CN203577817U - Piston type burette - Google Patents

Abstract

Translated fromChinese

一种活塞式滴管，包括管体、气筒、活塞以及连杆，活塞设置在气筒内部，活塞的一端与连杆连接，气筒底部设有开口，开口的直径与管体的直径相同，气筒内设有挡板，挡板位于气筒下方并与气筒底部形成间隙，管体通过开口插接在气筒上并抵靠在挡板上，气筒上与管体相对的一端设有手指着力支架，连杆上与活塞相对的一端设有圆形压板，手指着力支架与圆形压板之间的连杆部分套有弹簧，气筒内壁和活塞表面覆盖聚四氟乙烯材料层。本实用新型用活塞式结构代替了传统的橡胶胶帽，避免了经常更换胶帽造成的资源浪费，而且能够轻松地吸取粘度较大的液体试剂，气筒内壁和活塞表面的聚四氟乙烯材料具有极低的摩擦系数以及较高的抗酸碱腐蚀强度。

A piston-type dropper, including a tube body, a gas cylinder, a piston and a connecting rod. The piston is arranged inside the gas cylinder, and one end of the piston is connected to the connecting rod. There is a baffle, the baffle is located below the gas cylinder and forms a gap with the bottom of the gas cylinder, the tube body is plugged into the gas cylinder through the opening and leans against the baffle plate, the end of the gas cylinder opposite to the tube body is provided with a finger force support, a connecting rod The end opposite to the piston is provided with a circular pressure plate, the connecting rod part between the finger support and the circular pressure plate is covered with a spring, and the inner wall of the gas cylinder and the surface of the piston are covered with a polytetrafluoroethylene material layer. The utility model replaces the traditional rubber rubber cap with a piston structure, avoids the waste of resources caused by frequent replacement of the rubber cap, and can easily absorb liquid reagents with high viscosity. The polytetrafluoroethylene material on the inner wall of the cylinder and the surface of the piston has Very low coefficient of friction and high resistance to acid and alkali corrosion.

Description

Translated fromChinese

一种活塞式滴管A piston dropper

技术领域technical field

本实用新型涉及一种实验室用的滴管，尤其是一种活塞式滴管。The utility model relates to a dropper for laboratories, in particular to a piston type dropper.

背景技术Background technique

胶头滴管是一种实验室中常用的化学仪器，在滴加液体试剂时使用频繁。但是，如果液体试剂粘度过大(例如丙三醇，硬脂酸，OP-10等)，经常会出现胶头滴管的胶帽即使捏干瘪了也无法吸取试剂的现象，而且橡胶材质的胶帽容易老化，需要经常更换，费时费力，浪费资源。The rubber dropper is a chemical instrument commonly used in the laboratory, and it is frequently used when adding liquid reagents. However, if the viscosity of the liquid reagent is too high (such as glycerin, stearic acid, OP-10, etc.), it often occurs that the rubber cap of the rubber dropper cannot absorb the reagent even if it is pinched dry, and the rubber rubber The cap is easy to age and needs to be replaced frequently, which is time-consuming and labor-intensive, and a waste of resources.

实用新型内容Utility model content

为了克服传统的胶头滴管存在的无法吸取粘度较大的试剂和胶帽容易老化的问题，本实用新型提供了一种活塞式半自动滴管，该种活塞式半自动滴管不但不使用橡胶胶帽，而且可以轻松地吸取粘度较大的液体试剂。In order to overcome the problems that the traditional rubber dropper cannot absorb the reagent with high viscosity and the rubber cap is easy to age, the utility model provides a piston-type semi-automatic dropper, which not only does not use rubber cap, and can easily absorb viscous liquid reagents.

本实用新型所采取的技术方案是：一种活塞式滴管，包括管体、气筒、活塞以及连杆，所述活塞设置在气筒内部，所述活塞的一端与连杆连接，所述气筒底部设有开口，所述开口的直径与管体的直径相同，所述气筒内设有挡板，所述挡板位于气筒下方并与气筒底部形成间隙，所述管体通过开口插接在气筒上并抵靠在挡板上，所述气筒上与管体相对的一端设有手指着力支架，所述连杆上与活塞相对的一端设有圆形压板，所述手指着力支架与圆形压板之间的连杆部分套有弹簧。The technical scheme adopted by the utility model is: a piston-type dropper, including a pipe body, an air cylinder, a piston and a connecting rod, the piston is arranged inside the air cylinder, one end of the piston is connected with the connecting rod, and the bottom of the air cylinder An opening is provided, and the diameter of the opening is the same as that of the pipe body, and a baffle is provided inside the gas cylinder, and the baffle is located below the gas cylinder and forms a gap with the bottom of the gas cylinder, and the pipe body is inserted into the gas cylinder through the opening And lean against the baffle, the end of the gas cylinder opposite to the tube body is provided with a finger force support, the end of the connecting rod opposite to the piston is provided with a circular pressure plate, and the finger force support and the circular pressure plate The connecting rod part between is covered with spring.

优选地，所述气筒内壁和活塞表面覆盖聚四氟乙烯材料层。Preferably, the inner wall of the cylinder and the surface of the piston are covered with a polytetrafluoroethylene material layer.

优选地，所述挡板呈圆环形。Preferably, the baffle is circular.

优选地，所述挡板与气筒底部的间隙大小为气筒高度的1/5。Preferably, the gap between the baffle plate and the bottom of the gas cylinder is 1/5 of the height of the gas cylinder.

优选地，所述挡板上方气筒的直径是管体直径的1.5倍到2倍。Preferably, the diameter of the gas cylinder above the baffle is 1.5 to 2 times the diameter of the pipe body.

优选地，所述手指着力支架的两端呈三角形。Preferably, both ends of the finger support support are triangular in shape.

本实用新型的有益效果是：滴管用活塞式结构代替了传统的橡胶胶帽，避免了经常更换胶帽造成的资源浪费，而且能够轻松地吸取粘度较大的液体试剂，气筒内壁和活塞表面的聚四氟乙烯材料具有极低的摩擦系数以及较高的抗酸碱腐蚀强度。The beneficial effects of the utility model are: the dropper uses a piston structure instead of the traditional rubber rubber cap, which avoids the waste of resources caused by frequent replacement of the rubber cap, and can easily absorb the liquid reagent with high viscosity, the inner wall of the gas cylinder and the surface of the piston. PTFE material has extremely low friction coefficient and high resistance to acid and alkali corrosion.

附图说明Description of drawings

图1为本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.

图2为挡板的结构示意图。Figure 2 is a schematic structural view of the baffle.

图3为手指着力支架的俯视图。Figure 3 is a top view of the finger support.

具体实施方式Detailed ways

以下结合附图对本实用新型作进一步说明。Below in conjunction with accompanying drawing, the utility model is further described.

如图1、图2和图3所示，一种活塞式滴管，包括管体1，它的一端为圆锥形吸嘴2，另一端连接气筒3，气筒3呈空心圆柱形，气筒3与管体1相对的一端设有手指着力支架4，手指着力支架4的两端呈三角形。气筒3内设有活塞5，气筒3内壁和活塞5表面覆盖聚四氟乙烯材料层，聚四氟乙烯材料具有抗酸碱腐蚀，摩擦系数低的优点，活塞5可以在气筒3内很顺畅的来回运动。气筒3内设有圆环形挡板6，挡板6位于气筒3下方并与气筒3底部形成间隙7，间隙7的大小为气筒3高度的1/5。气筒3底部设有开口8，开口8的直径与管体1的直径相同，二者正好能组装到一起，形成密封配合，挡板6上方气筒3的直径是管体1直径的1.5倍到2倍。管体1通过开口8插接在气筒3上并抵靠在挡板6上，挡板6的作用是不会使得安装时导致管体1过于靠上而减少活塞5的活动空间。活塞5的一端设有连杆9，连杆9伸出气筒3的外部，连杆9的末端设有圆形压板10，在手指着力支架4与圆形压板10之间的连杆9部分套有弹簧11。其中，管体1由玻璃制成，气筒3、手指着力支架4、活塞5、连杆6、圆形压板10都由塑料制成。As shown in Figure 1, Figure 2 and Figure 3, a piston-type dropper includes apipe body 1, one end of which is aconical suction nozzle 2, and the other end is connected to an air cylinder 3, the air cylinder 3 is hollow cylindrical, and the air cylinder 3 and The opposite end of thetube body 1 is provided with a finger force support 4, and the two ends of the finger force support 4 are triangular. The gas cylinder 3 is provided with apiston 5, and the inner wall of the gas cylinder 3 and the surface of thepiston 5 are covered with a polytetrafluoroethylene material layer. The polytetrafluoroethylene material has the advantages of anti-acid and alkali corrosion and low friction coefficient. Thepiston 5 can move smoothly in the gas cylinder 3. back and forth motion. The gas cylinder 3 is provided with anannular baffle 6, thebaffle 6 is located below the gas cylinder 3 and forms agap 7 with the bottom of the gas cylinder 3, and the size of thegap 7 is 1/5 of the height of the gas cylinder 3. The bottom of the gas cylinder 3 is provided with anopening 8. The diameter of theopening 8 is the same as that of thepipe body 1. The two can be assembled together to form a sealed fit. The diameter of the gas cylinder 3 above thebaffle plate 6 is 1.5 times to 2 times the diameter of thepipe body 1. times. Thepipe body 1 is plugged into the gas cylinder 3 through the opening 8 and leans against thebaffle plate 6. The function of thebaffle plate 6 is not to cause thepipe body 1 to be too high during installation and reduce the movable space of thepiston 5. One end of thepiston 5 is provided with a connecting rod 9, and the connecting rod 9 protrudes from the outside of the air cylinder 3. The end of the connecting rod 9 is provided with a circularpressing plate 10, and the connecting rod 9 between the finger support 4 and the circularpressing plate 10 is covered with aspring 11. Wherein, thepipe body 1 is made of glass, and the air cylinder 3, the finger support bracket 4, thepiston 5, the connectingrod 6, and the circularpressing plate 10 are all made of plastic.

使用时，将中指与食指抵在手指着力支架4的下方，拇指按动圆形压板10，此时活塞5在连杆9的推动下，压缩弹簧11向气筒3下方运动，排出气筒3内的空气，将滴管的吸嘴2浸入液体试剂中并松开拇指，此时活塞5在弹簧11的弹力作用下向气筒3上方运动，将液体试剂吸入管体1内。When in use, put the middle finger and forefinger under the support 4 of the finger, and press thecircular pressure plate 10 with the thumb. At this time, thepiston 5 is pushed by the connecting rod 9, and thecompression spring 11 moves to the bottom of the gas cylinder 3 to discharge the gas in the gas cylinder 3. Air, immerse thesuction nozzle 2 of the dropper in the liquid reagent and release the thumb. At this time, thepiston 5 moves to the top of the air cylinder 3 under the elastic force of thespring 11, and the liquid reagent is sucked into thetube body 1.

本实用新型用活塞式结构代替了传统的橡胶胶帽，避免了经常更换胶帽造成的资源浪费，而且能够轻松地吸取粘度较大的液体试剂，气筒内壁和活塞表面的聚四氟乙烯材料具有极低的摩擦系数以及较高的抗酸碱腐蚀强度。The utility model replaces the traditional rubber rubber cap with a piston structure, avoids the waste of resources caused by frequent replacement of the rubber cap, and can easily absorb liquid reagents with high viscosity. The polytetrafluoroethylene material on the inner wall of the cylinder and the surface of the piston has Very low coefficient of friction and high resistance to acid and alkali corrosion.

需要说明的是，上述说明并非是对本实用新型的限制，本实用新型也并不仅限于上述举例，本领域的普通技术人员在本实用新型的实质范围内所做出的变化、改型、添加或替换，都应涵盖于本实用新型的保护范围之内。It should be noted that the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples, changes, modifications, additions or changes made by those skilled in the art within the essential scope of the present utility model Replacement should be covered within the protection scope of the present utility model.

Claims (6)

Translated fromChinese

1.一种活塞式滴管，包括管体、气筒、活塞以及连杆，所述活塞设置在气筒内部，所述活塞的一端与连杆连接，其特征在于，所述气筒底部设有开口，所述开口的直径与管体的直径相同，所述气筒内设有挡板，所述挡板位于气筒下方并与气筒底部形成间隙，所述管体通过开口插接在气筒上并抵靠在挡板上，所述气筒上与管体相对的一端设有手指着力支架，所述连杆上与活塞相对的一端设有圆形压板，所述手指着力支架与圆形压板之间的连杆部分套有弹簧。1. A piston type dropper, comprising a body, a gas cylinder, a piston and a connecting rod, the piston is arranged inside the gas cylinder, and one end of the piston is connected with the connecting rod, it is characterized in that the bottom of the gas cylinder is provided with an opening, The diameter of the opening is the same as that of the pipe body. A baffle is provided inside the gas cylinder. The baffle is located below the gas cylinder and forms a gap with the bottom of the gas cylinder. The pipe body is inserted into the gas cylinder through the opening and leans against it. On the baffle, the end of the air cylinder opposite to the tube body is provided with a finger force support, and the end of the connecting rod opposite to the piston is provided with a circular pressure plate, and the connecting rod between the finger force support and the circular pressure plate Some are covered with springs.2.根据权利要求1所述的活塞式滴管，其特征在于，所述气筒内壁和活塞表面覆盖聚四氟乙烯材料层。2. The piston-type dropper according to claim 1, characterized in that, the inner wall of the cylinder and the surface of the piston are covered with a polytetrafluoroethylene material layer.3.根据权利要求1所述的活塞式滴管，其特征在于，所述挡板呈圆环形。3. The piston-type dropper according to claim 1, characterized in that, the baffle is circular.4.根据权利要求1所述的活塞式滴管，其特征在于，所述挡板与气筒底部的间隙大小为气筒高度的1/5。4. The piston-type dropper according to claim 1, wherein the gap between the baffle plate and the bottom of the gas cylinder is 1/5 of the height of the gas cylinder.5.根据权利要求1所述的活塞式滴管，其特征在于，所述挡板上方气筒的直径是管体直径的1.5倍到2倍。5. The piston-type dropper according to claim 1, wherein the diameter of the air cylinder above the baffle is 1.5 to 2 times the diameter of the pipe body.6.根据权利要求1所述的活塞式滴管，其特征在于，所述手指着力支架的两端呈三角形。6 . The piston-type dropper according to claim 1 , characterized in that, the two ends of the finger support support are triangular. 7 .

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