技术领域technical field
本发明涉及一种测定混凝土渗透性的装置。The invention relates to a device for measuring the permeability of concrete.
背景技术Background technique
在评价混凝土的性能时，渗透性是一个重要指标，它是指气体、液体或者离子受压力、化学势或者电场作用，在混凝土中渗透、扩散或迁移的难易程度。混凝土渗透性与耐久性之间有着密切的关系，开展对混凝土渗透性的研究，无疑是耐久性研究中不可少的组成部分，对混凝土耐久性的评价与高耐久性混凝土的设计亦具有重要的现实意义。When evaluating the performance of concrete, permeability is an important indicator, which refers to the difficulty of permeation, diffusion or migration of gases, liquids or ions in concrete under the action of pressure, chemical potential or electric field. There is a close relationship between the permeability and durability of concrete. The research on the permeability of concrete is undoubtedly an indispensable part of the durability research. It is also important for the evaluation of the durability of concrete and the design of high-durability concrete. Practical significance.
目前国内对混凝土渗透性的测试方法有多种，普遍使用的抗渗等级方法结果真实、可靠，但由于水泥基复合材料往往具有较好的抗渗性能，因此该实验方法周期长，效率很低，并且该试验方法水压力随时间变化，难以通过流量比较渗透系数。采用气体渗透法，快速且精度较高，但对试样处理的要求较高，尤其对于掺混合材的混凝土试样加热处理后，混凝土的强度有不同程度的提高，孔结构可能发生了较大变化，不能保证测试结果的真实性。At present, there are many methods for testing the permeability of concrete in China. The widely used method of impermeability level is true and reliable. However, because cement-based composite materials often have good impermeability, this experimental method has a long cycle and low efficiency. , and the test method water pressure changes with time, it is difficult to compare the permeability coefficient by flow rate. The gas permeation method is fast and has high precision, but it has high requirements for sample processing, especially for concrete samples mixed with mixed materials. After heating, the strength of the concrete is improved to varying degrees, and the pore structure may be larger. changes, and the authenticity of test results cannot be guaranteed.
发明内容Contents of the invention
本发明的目的在于一种测定混凝土渗透性的装置，以解决目前检测混凝土渗透性的装置复杂、检测方法操作繁琐且精度不够的问题。The object of the present invention is a device for measuring the permeability of concrete, so as to solve the problems that the current device for detecting the permeability of concrete is complex, the detection method is cumbersome to operate and the precision is not enough.
为了解决上述技术问题，本发明的技术方案为：一种测定混凝土渗透性的装置，包括用来固定混凝土试件的试样架，并且试样架可将混凝土试件的边壁密封，还包括依次通过管道连通的渗水漏斗、测量管、加压箱和储水箱，渗水漏斗密封式、可拆卸式连接的在试样架一端，测量管竖直布置，在加压箱和储水箱连通的管道上安装有第一电控阀，加压箱和储水箱上端均连通有第一压缩空气管，在第一压缩空气管上安装有第一压力控制阀，在测量管上安装有液位计。In order to solve the above technical problems, the technical solution of the present invention is: a device for measuring the permeability of concrete, including a sample holder for fixing the concrete sample, and the sample holder can seal the side wall of the concrete sample, and also includes The water seepage funnel, the measuring tube, the pressurized tank and the water storage tank are connected through the pipeline in turn. The water seepage funnel is sealed and detachably connected at one end of the sample holder, the measuring tube is arranged vertically, and the pipeline connected between the pressurized tank and the water storage tank The first electric control valve is installed on the upper end of the pressure tank and the water storage tank are connected with the first compressed air pipe, the first pressure control valve is installed on the first compressed air pipe, and the liquid level gauge is installed on the measuring pipe.
所述试样架包括套在混凝土试件外的套管、套在套管外的环套和分别设置在混凝土试件两端的两块环形压板，两块压板通过多根螺杆可拆卸式连接，套管两端延伸出混凝土试件的端头被压紧压板与混凝土试件之间或者压板与环套之间，压板与所述环套之间采用密封连接，由环套和套管间隔出压水空腔，在环套下端连通有进水管，环套上端设有排气管，进水管与一个压水装置连通，排气管上安装有密封螺栓，所述套管是为乳胶膜制成，所述渗水漏斗通过螺丝密封连接在压板上。The sample holder includes a casing sleeved outside the concrete specimen, a ring sleeve sleeved outside the sleeve pipe and two annular pressure plates respectively arranged at both ends of the concrete specimen, and the two pressure plates are detachably connected by a plurality of screws. The end of the concrete specimen extending from both ends of the casing is compressed between the pressure plate and the concrete specimen or between the pressure plate and the ring sleeve. The pressure plate and the ring sleeve are sealed and connected, separated by the ring sleeve and the sleeve The water pressure cavity is connected with a water inlet pipe at the lower end of the ring sleeve, and an exhaust pipe is provided at the upper end of the ring sleeve. The water inlet pipe is connected with a water pressure device, and a sealing bolt is installed on the exhaust pipe. As a result, the seepage funnel is sealed and connected to the pressure plate through screws.
环套两端具有环板，在环板上设有一圈环形凸起，在压板端面上设有一圈环形切槽，在切槽内设有密封圈，在将两块压板相互靠近时，所述凸出可插入到切槽中，并压紧在密封圈上。There are ring plates at both ends of the ring sleeve, a ring-shaped protrusion is set on the ring plate, a ring-shaped groove is arranged on the end surface of the pressure plate, and a sealing ring is arranged in the groove. When the two pressure plates are brought close to each other, the The protrusions are inserted into the slots and pressed against the sealing ring.
所述压水装置包括储水罐，进水管一端连通在储水罐的下部，在储水罐上端面连通有第二压缩空气管，在第二压缩空气管上安装有第二压力控制阀、压力传感器和第二电控阀。The pressurized water device includes a water storage tank, one end of the water inlet pipe is connected to the lower part of the water storage tank, a second compressed air pipe is connected to the upper surface of the water storage tank, and a second pressure control valve, Pressure sensor and second electrically controlled valve.
所述液位计为差压液位计，差压液位计和压力传感器将检测的信号传输给计算机，计算机控制第一电控阀和第二电控阀启闭。The liquid level gauge is a differential pressure liquid level gauge, and the differential pressure liquid level gauge and the pressure sensor transmit the detected signals to the computer, and the computer controls the opening and closing of the first electric control valve and the second electric control valve.
一种测试混凝土渗透系数的方法，包括如下步骤：A method for testing concrete permeability, comprising the steps of:
第一步：将混凝土试件安装到试样架内将水灌入到储水罐内，通过压缩空气将水压入到压水空腔内，让水漫过排气管，随后将密封螺栓旋紧到排气管上；Step 1: Install the concrete specimen into the sample rack, pour water into the water storage tank, press the water into the pressurized water cavity through compressed air, let the water overflow the exhaust pipe, and then seal the bolt screwed onto the exhaust pipe;
第二步：持续将压缩空气压入到储水罐中，让套管紧贴混凝土在混凝土试件周围，以将混凝土试件边壁密封；Step 2: Continuously press the compressed air into the water storage tank, let the casing cling to the concrete around the concrete specimen, so as to seal the side wall of the concrete specimen;
第三步：将水灌入到储水箱内，打开第一电控阀，当水进入到渗水漏斗和测量管后，第一电控阀关闭；Step 3: Pour water into the water storage tank, open the first electric control valve, when the water enters the seepage funnel and the measuring tube, the first electric control valve is closed;
第四步：将压缩空气充入到储水箱和加压箱内，测量管内的水位随着混凝土渗透缓缓下降，在下降的过程中，差压液位计实时监测液位的高度差，计算机换算出测量管内流速v1，已知气压力P、混凝土试件长度L、测量管（5）截面积A1和混凝土试件截面积A2，可得到通过混凝土试样的流速v2；再由达西定律计算出试样的渗透系数K，计算公式为：K=v2*L/P。Step 4: Fill the compressed air into the water storage tank and the pressurized tank, and the water level in the measuring tube will drop slowly with the penetration of concrete. Convert the flow velocity v1 in the measuring tube, the air pressure P, the length L of the concrete specimen, the cross-sectional area A1 of the measuring tube (5) and the cross-sectional area A2 of the concrete specimen are known, and the flow velocity v2 passing through the concrete specimen can be obtained; then by Darcy's law Calculate the permeability coefficient K of the sample, and the calculation formula is: K=v2*L/P.
一种测试混凝土渗透系数的方法中在进行上述第二步前，需要检查压水空腔的密封性，检查方法为：持续将压缩空气压入到储水罐中，当压力传感器监测到储水罐内的气压达到第二压力控制阀的预设压力时，计算机控制第二电控阀关闭，让储水罐保压一段时间，而后压力传感器检测储水罐内压力值，如若压力传感器检测到储水罐内压力值小于第二压力控制阀预设值，则代表压水空腔密封不严，存在漏水，需要排除漏水点，直到压水空腔完全密封。In a method of testing the concrete permeability coefficient, before performing the second step above, it is necessary to check the tightness of the pressurized water cavity. The inspection method is: continuously press compressed air into the water storage tank, and when the pressure sensor monitors the water storage tank When the air pressure in the tank reaches the preset pressure of the second pressure control valve, the computer controls the second electric control valve to close, allowing the water storage tank to maintain pressure for a period of time, and then the pressure sensor detects the pressure value in the water storage tank. If the pressure sensor detects If the pressure value in the water storage tank is less than the preset value of the second pressure control valve, it means that the pressure water cavity is not tightly sealed and there is water leakage. It is necessary to eliminate the leak point until the pressure water cavity is completely sealed.
一种测试混凝土渗透系数的方法还包括第五步：计算机预设测量管上下限水头液位，当水头低于下限液位时，计算机控制第一电控阀开启，让水位上升，当水位上升到水头上限液位时，计算机控制第一电控阀关闭，实现自动加水。A method for testing the concrete permeability coefficient also includes the fifth step: the computer presets the upper and lower limits of the water head level of the measuring tube. When the water head is lower than the lower limit level, the computer controls the opening of the first electric control valve to allow the water level to rise. When the upper limit of the water head is reached, the computer controls the first electric control valve to close to realize automatic water addition.
本发明的有益效果为：本发明可以方便的测量出混凝土试件的渗透系数，在测试时，能够对混凝土边壁进行良好的密封，确保测量的准确性，通过差压液位计能够实时监控渗透情况，求出任意时间段内的渗透系数，通过自动控制实现测试管内自动加水，能够连续进行加压渗水测试，使用操作更加方便，通过控制气压力的施加大小，能够对混凝土试件进行多个压力梯度下测量，增加试验结果的可靠性,能够更加精确的测试渗透流速，提高了渗透系数的测试精度。The beneficial effects of the present invention are: the present invention can conveniently measure the permeability coefficient of the concrete specimen, and can perform good sealing on the concrete side wall during the test to ensure the accuracy of the measurement, and can monitor in real time through the differential pressure liquid level gauge Infiltration condition, find out the permeability coefficient in any period of time, through automatic control to realize automatic water addition in the test tube, can continuously carry out pressurized water seepage test, and the operation is more convenient. The measurement under a pressure gradient increases the reliability of the test results, can test the permeation flow rate more accurately, and improves the test accuracy of the permeability coefficient.
附图说明Description of drawings
下面结合附图对本发明做进一步的说明：Below in conjunction with accompanying drawing, the present invention will be further described:
图1为本发明的主视结构示意图，Fig. 1 is the front view structure schematic diagram of the present invention,
图2为本发明关于试样架的主视结构示意图，Fig. 2 is the schematic diagram of the front view structure of the sample holder of the present invention,
图3为图2中A处的局部放大结构示意图。FIG. 3 is a schematic diagram of a partially enlarged structure at point A in FIG. 2 .
图中：混凝土试件1、试样架2、储水箱3、加压箱4、测量管5、储水罐6、渗水漏斗7、密封圈25、第一电控阀301、液位计8、套管21、环套22、压板24、螺杆241、压水空腔23、进水管202、排气管201、密封螺栓27、环板222、凸起221、密封圈25、进水管202、第二压缩空气管92、第二压力控制阀102、压力传感器10、第二电控阀302。In the figure: concrete specimen 1, specimen holder 2, water storage tank 3, pressurization tank 4, measuring tube 5, water storage tank 6, seepage funnel 7, sealing ring 25, first electric control valve 301, liquid level gauge 8 , sleeve pipe 21, ring sleeve 22, pressure plate 24, screw rod 241, pressure water cavity 23, water inlet pipe 202, exhaust pipe 201, sealing bolt 27, ring plate 222, protrusion 221, sealing ring 25, water inlet pipe 202, The second compressed air pipe 92 , the second pressure control valve 102 , the pressure sensor 10 , and the second electric control valve 302 .
具体实施方式detailed description
如图1到3所示，一种测定混凝土渗透性的装置，包括用来固定混凝土试件的试样架2，并且试样架2可将混凝土试件的边壁密封，还包括依次通过管道连通的渗水漏斗7、测量管5、加压箱4和储水箱3，渗水漏斗7通过螺丝安装在试样架2一端，在渗水漏斗7与试样架2之间使用密封圈25密封，测量管5竖直布置，在加压箱4和储水箱3连通的管道上安装有第一电控阀301，加压箱4和储水箱3上端均连通有第一压缩空气管91，在第一压缩空气管91上安装有第一压力控制阀101，在测量管5上安装有液位计8。As shown in Figures 1 to 3, a device for measuring the permeability of concrete includes a sample holder 2 for fixing the concrete sample, and the sample holder 2 can seal the side wall of the concrete sample, and also includes passing through the pipeline successively. Connected water seepage funnel 7, measuring tube 5, pressurized tank 4 and water storage tank 3, water seepage funnel 7 is installed on one end of sample holder 2 by screws, seal ring 25 is used between water seepage funnel 7 and sample holder 2, measure The pipe 5 is vertically arranged, and a first electric control valve 301 is installed on the pipeline connecting the pressurized tank 4 and the water storage tank 3. The upper ends of the pressurized tank 4 and the water storage tank 3 are connected with a first compressed air pipe 91. A first pressure control valve 101 is installed on the compressed air pipe 91 , and a liquid level gauge 8 is installed on the measuring pipe 5 .
在使用时，首先打开第一电磁阀301，将储水箱3中的水灌入到加压箱4，并沿测量管5和管道使渗水漏斗7充满液体。而后通过压缩空气将水推送到混凝土试件内渗透，因为是通过气压推动水，所以能够保证水持续稳定的进入到混凝土试件中，保证试验结果的准确性，通过第一电控阀301可以在测量管5液面过低时为测量管5自动加水，保证试验的持续进行，使得操作更加方便。When in use, the first electromagnetic valve 301 is first opened, the water in the water storage tank 3 is poured into the pressurized tank 4, and the seepage funnel 7 is filled with liquid along the measuring tube 5 and the pipeline. Then, the compressed air is used to push the water into the concrete specimen for infiltration. Because the water is pushed by the air pressure, it can ensure that the water enters the concrete specimen continuously and stably, ensuring the accuracy of the test results. The first electric control valve 301 can When the liquid level of the measuring tube 5 is too low, water is automatically added to the measuring tube 5 to ensure the continuous operation of the test and make the operation more convenient.
所述试样架2包括套在混凝土试件外的套管21、套在套管21外的环套22和分别设置在混凝土试件两端的两块环形压板24，两块压板24通过多根螺杆241可拆卸式连接，套管21两端延伸出混凝土试件的端头211被压紧压板24与混凝土试件之间或者压板24与环套22之间，压板24与所述环套22之间采用密封连接，由环套22和套管21间隔出压水空腔23，在环套22下端连通有进水管202，环套22上端设有排气管201，进水管202与一个压水装置连通，排气管201上安装有密封螺栓27，所述套管21是为乳胶膜制成，所述渗水漏斗7通过螺丝密封连接在压板24上。The sample holder 2 includes a casing 21 set outside the concrete test piece, a ring sleeve 22 set outside the casing 21, and two annular pressure plates 24 respectively arranged at both ends of the concrete test piece. The two pressure plates 24 pass through a plurality of The screw rod 241 is detachably connected, and the ends 211 of the concrete specimen extending from the two ends of the casing 21 are compressed between the pressure plate 24 and the concrete specimen or between the pressure plate 24 and the ring sleeve 22, and the pressure plate 24 and the ring sleeve 22 A sealed connection is adopted between them, and the pressurized water cavity 23 is separated by the ring sleeve 22 and the sleeve pipe 21. The lower end of the ring sleeve 22 is connected with a water inlet pipe 202, and the upper end of the ring sleeve 22 is provided with an exhaust pipe 201. The water inlet pipe 202 is connected with a pressure The water device is connected, and a sealing bolt 27 is installed on the exhaust pipe 201. The sleeve 21 is made of latex film, and the water seepage funnel 7 is connected to the pressure plate 24 by screw sealing.
试样架2密封混凝土试件边壁的过程为：首先打开密封螺栓27，通过压水装置将水灌入到压水空腔23内，水渐渐上升，压水空腔23内的空气被排空，当水漫过排气管201时，将密封螺栓27安装到排气管201内，随着水的持续灌入，套管21会受压而紧贴混凝土试件的周围，进而混凝土试件边壁被完全密封，当使用渗水漏斗7向混凝土试件内加压渗水时，试样架2保证水不会沿混凝土边壁泄漏，确保测量的准确性。The process of sealing the side wall of the concrete specimen by the sample holder 2 is as follows: firstly open the sealing bolt 27, pour water into the water pressure cavity 23 through the water pressure device, the water gradually rises, and the air in the water pressure cavity 23 is exhausted. When the water overflows the exhaust pipe 201, install the sealing bolt 27 into the exhaust pipe 201. As the water continues to pour in, the casing 21 will be pressed and close to the surrounding of the concrete specimen, and then the concrete specimen will The side wall of the piece is completely sealed, and when the water seepage funnel 7 is used to pressurize water into the concrete test piece, the sample holder 2 ensures that water will not leak along the side wall of the concrete to ensure the accuracy of the measurement.
环套22两端具有环板222，在环板222上设有一圈环形凸起221，在压板24端面上设有一圈环形切槽，在切槽内设有密封圈25，在将两块压板24相互靠近时，所述凸出可插入到切槽中，并压紧在密封圈25上。这种结构能够提高环板222与压板24之间的密封效果，此外切槽能够限制凸起221向外扩张，避免环套22两端因受水压而向外扩张变形。There are ring plates 222 at both ends of the ring sleeve 22, and a circle of annular protrusions 221 is arranged on the ring plate 222, and an annular groove is arranged on the end surface of the pressure plate 24, and a sealing ring 25 is arranged in the groove. When 24 is close to each other, the protrusion can be inserted into the slot and pressed against the sealing ring 25 . This structure can improve the sealing effect between the ring plate 222 and the pressure plate 24 , and the notch can limit the outward expansion of the protrusion 221 , avoiding outward expansion and deformation of both ends of the ring sleeve 22 due to water pressure.
所述压水装置包括储水罐6，进水管202一端连通在储水罐6的下部，在储水罐6上端面连通有第二压缩空气管92，在第二压缩空气管92上安装有第二压力控制阀102、压力传感器10和第二电控阀302。The pressurized water device includes a water storage tank 6, one end of the water inlet pipe 202 communicates with the lower part of the water storage tank 6, and a second compressed air pipe 92 is communicated with the upper end of the water storage tank 6, and a second compressed air pipe 92 is installed on the second compressed air pipe 92. The second pressure control valve 102 , the pressure sensor 10 and the second electric control valve 302 .
在储水罐6将水灌入到压水空腔23中后，通过压力传感器10监控储水罐6内的空气压力变化，判断压力空腔是否存在漏水，保证了混凝土试件边壁有效密封，此外，本压水装置不仅出水稳定，还可以通过压力控制阀控制压缩空气压力来调节水压。After the water storage tank 6 pours water into the pressurized water cavity 23, the air pressure change in the water storage tank 6 is monitored by the pressure sensor 10 to determine whether there is water leakage in the pressure cavity, which ensures that the side wall of the concrete specimen is effectively sealed , In addition, the pressurized water device not only has stable water output, but also can adjust the water pressure by controlling the compressed air pressure through the pressure control valve.
所述液位计8为差压液位计8，差压液位计8的两个测量端头211分别连接在测量管5下端和加压箱4上端，差压液位计8和压力传感器10将检测的液位信号和压力信号传输给计算机，计算机控制第一电控阀301和第二电控阀302启闭。The liquid level gauge 8 is a differential pressure liquid level gauge 8, and the two measuring terminals 211 of the differential pressure liquid level gauge 8 are respectively connected to the lower end of the measuring tube 5 and the upper end of the pressurized tank 4, and the differential pressure liquid level gauge 8 and the pressure sensor 10 transmits the detected liquid level signal and pressure signal to the computer, and the computer controls the opening and closing of the first electric control valve 301 and the second electric control valve 302 .
一种测试混凝土渗透系数的方法，包括如下步骤：A method for testing concrete permeability, comprising the steps of:
第一步：将混凝土试件安装到试样架2内将水灌入到储水罐6内，通过压缩空气将水压入到压水空腔23内，让水漫过排气管201，在压水空腔23内空气排空后，通过密封螺栓27将排气管201封闭；The first step: install the concrete specimen in the sample rack 2, pour water into the water storage tank 6, press the water into the pressurized water cavity 23 through compressed air, let the water flow through the exhaust pipe 201, After the air in the pressurized water cavity 23 is emptied, the exhaust pipe 201 is closed by the sealing bolt 27;
第二步：持续将压缩空气压入到储水罐6中，让套管21紧贴混凝土在混凝土试件周围，以将混凝土试件边壁密封；Step 2: continuously press the compressed air into the water storage tank 6, let the casing 21 cling to the concrete around the concrete specimen, so as to seal the side wall of the concrete specimen;
第三步：将水灌入到储水箱3内，打开第一电控阀301，当水进入到渗水漏斗7和测量管5后，第一电控阀301关闭，假如储水箱3内的水被排空，保证储水箱3内存有2/3箱水；Step 3: pour water into the water storage tank 3, open the first electric control valve 301, when the water enters the seepage funnel 7 and the measuring tube 5, the first electric control valve 301 is closed, if the water in the water storage tank 3 It is emptied to ensure that there are 2/3 tanks of water in the storage tank 3;
第四步：将压缩空气充入到储水箱3和加压箱4内，测量管5内的水位随着混凝土渗透缓缓下降，在下降的过程中，差压液位计8实时监测液位的高度差，计算机换算出测量管5内流速v1，已知气压力P、混凝土试件长度L、测量管（5）截面积A1和混凝土试件截面积A2，可得到通过混凝土试样的流速v2；再由达西定律计算出试样的渗透系数K，计算公式为：K=v2*L/P，L是混凝土试件长度，P是压缩空气压力。Step 4: Fill the compressed air into the water storage tank 3 and the pressurized tank 4, and the water level in the measuring tube 5 drops slowly with the penetration of the concrete. During the falling process, the differential pressure level gauge 8 monitors the liquid level in real time height difference, the computer converts the flow velocity v1 in the measuring tube 5, given the air pressure P, the length L of the concrete specimen, the cross-sectional area A1 of the measuring tube (5) and the cross-sectional area A2 of the concrete specimen, the flow velocity through the concrete specimen can be obtained v2; then calculate the permeability coefficient K of the sample by Darcy's law, the calculation formula is: K=v2*L/P, L is the length of the concrete specimen, and P is the compressed air pressure.
通过液位计8实时监测测量管5内液体流量变化，可以方便计算出任意时间段内混凝土试样的流速，并由达西定律计算该时间段内的试样渗透系数K。绘制出不同时间点的渗透性系数K变化曲线，通过调整第一压力控制阀101可控制气压力的施压大小，能够对混凝土试件进行多个压力梯度测量，增加了试验结果的可靠性。The flow rate of the concrete sample in any time period can be easily calculated by monitoring the change of the liquid flow in the measuring tube 5 by the liquid level gauge 8 in real time, and the permeability coefficient K of the sample in this time period can be calculated by Darcy's law. The variation curves of the permeability coefficient K at different time points are plotted, and the pressure applied by the air pressure can be controlled by adjusting the first pressure control valve 101. Multiple pressure gradient measurements can be performed on the concrete specimen, which increases the reliability of the test results.
一种测试混凝土渗透系数的方法中在进行上述第二步前，需要检查压水空腔23的密封性，检查方法为：持续将压缩空气压入到储水罐6中，当压力传感器10监测到储水罐6内的气压达到第二压力控制阀102的预设压力时，计算机控制第二电控阀302关闭，让储水罐6保压5到10分钟，而后压力传感器10检测储水罐6内压力值，如若压力传感器10检测到储水罐6内压力值小于第二压力控制阀102预设值10kpa以上，则代表压水空腔23密封不严，存在漏水，需要查找压水空腔23漏水点，并对漏点进行封堵，直到压水空腔23完全密封。In a method for testing the concrete permeability coefficient, before performing the second step above, it is necessary to check the tightness of the pressurized water cavity 23. The inspection method is: continuously press compressed air into the water storage tank 6, and when the pressure sensor 10 monitors When the air pressure in the water storage tank 6 reaches the preset pressure of the second pressure control valve 102, the computer controls the second electric control valve 302 to close, allowing the water storage tank 6 to maintain the pressure for 5 to 10 minutes, and then the pressure sensor 10 detects the pressure of the stored water. The pressure value in the tank 6, if the pressure sensor 10 detects that the pressure value in the water storage tank 6 is less than the preset value of the second pressure control valve 102 by more than 10kpa, it means that the pressure water cavity 23 is not tightly sealed and there is water leakage, and it is necessary to search for the pressure water The cavity 23 leaks, and the leak is blocked until the pressurized water cavity 23 is completely sealed.
一种测试混凝土渗透系数的方法还包括第五步：计算机预设测量管5上下限水头液位，当水头低于下限液位时，计算机控制第一电控阀301开启，让水位上升，当水位上升到水头上限液位时，计算机控制第一电控阀301关闭，实现自动加水，保证实验能够持续进行。A method for testing the concrete permeability coefficient also includes a fifth step: the computer presets the upper and lower limits of the water head level of the measuring tube 5, and when the water head is lower than the lower limit level, the computer controls the opening of the first electric control valve 301 to allow the water level to rise. When the water level rises to the upper limit of the water head, the computer controls the first electric control valve 301 to close to realize automatic water addition to ensure that the experiment can continue.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043510.0ACN106706500A (en) | 2017-01-21 | 2017-01-21 | Device for determining permeability of concrete |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043510.0ACN106706500A (en) | 2017-01-21 | 2017-01-21 | Device for determining permeability of concrete |
| Publication Number | Publication Date |
|---|---|
| CN106706500Atrue CN106706500A (en) | 2017-05-24 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710043510.0APendingCN106706500A (en) | 2017-01-21 | 2017-01-21 | Device for determining permeability of concrete |
| Country | Link |
|---|---|
| CN (1) | CN106706500A (en) |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20170524 |