It is provided with the safety valve of dust-proof exhaust nozzleTechnical field
The utility model relates to machinery fields, are related to valve industry, and one kind being provided with dust-proof exhaust nozzleSafety valve.
Background technique
Safety valve is that opening and closing element is in normally off under by external force, is surpassed when the pressure medium in equipment or pipeline increasesWhen crossing specified value, by outside system discharge medium come to prevent pressure medium in pipeline or equipment be more than the particular usage valve of specified valueDoor.
Safety valve with bellows generally can all hold a threaded hole on valve deck, make in valve deck inner cavity and bellowsChamber is communicated with atmosphere, is guaranteed that inner cavity will not generate additional back pressure because of safety valve action, is influenced the performance of safety valve.
Common structure with a threaded elbow 50 with the threaded hole of valve deck 11 as shown in Figure 1, be connected, below threaded elbow 50A cap 51 is reconnected, rainwater and some big sundries can be prevented in this way；But then seem incompetent for some adverse circumstancesIt accumulates over a long period if not dust-proof processing for power, such as the area that desert dust is big, will be damaged full of dust in safety valveThe part of evil safety valve, eventually leads to safe defective valve.
It can be seen that although existing exhaust nozzle can prevent rainwater, big sundries, the environment big for some dustsThen less suitable, tiny dust is easy to enter valve by gas vent, influences the performance of safety valve.Therefore, one kind is designedThe exhaust nozzle for capableing of dust-proof, suitable adverse circumstances is very necessary.
Summary of the invention
The purpose of the utility model is to provide a kind of safety valves for being provided with dust-proof exhaust nozzle, in existing exhaust nozzleOn the basis of increase by one of Air Filter, while dust-proof, but facilitate user disassembly, replacement Air Filter.
In order to achieve the above objectives, the technical solution adopted in the utility model is：
A kind of safety valve being provided with dust-proof exhaust nozzle, including safe valve body are arranged on the safe valve bodyThere is dust-proof exhaust nozzle, the dust-proof exhaust nozzle includes the junction block, Air Filter and compression that both ends are respectively provided with openingComponent, one end of the junction block are connected with the safe valve body, and the compacting part is by the Air FilterIt is fixed on the opening of the junction block other end.
Preferably, it is provided with the first threaded portion on the outer peripheral surface of described junction block one end, the junction block passes through theOne threaded portion is connected with the safe valve body.
Preferably, the compacting part is open at one end, the other end offers through-hole, and described compacting part one end is openedThe junction block other end and the Air Filter are coated on interior by mouth.
It is further preferred that being provided with the second threaded portion, the compression on the outer peripheral surface of the junction block other endThird threaded portion is provided on component inner peripheral surface open at one end, the junction block, compacting part pass through second spiral shellLine portion, third threaded portion are connected.
It is further preferred that the compacting part is nut.
Preferably, the extending direction of the center line of the junction block is vertical with the extending direction of safety valve valve rod.
Preferably, the opening bore of described junction block one end is less than the opening bore of its other end.
Preferably, the outer diameter of described junction block one end is less than the outer diameter of its other end.
Preferably, the dust-proof exhaust nozzle is arranged on the valve deck of safety valve.
Preferably, safety valve setting and bellows.
Since above-mentioned technical proposal is used, the utility model has following advantages compared with prior art：
1, allow bellows safety valve that there is dust reduction capability；
2, can allow bellows safety valve be used in sand and dust more than adverse circumstances；
3, dust-proof exhaust nozzle disassembly, replace very convenient, be not required to specific purpose tool.
Detailed description of the invention
Attached drawing 1 is the partial schematic diagram of safety valve in the prior art；
Attached drawing 2 is the schematic diagram of dust-proof exhaust nozzle in the present embodiment
Attached drawing 3 is the partial schematic diagram of safety valve in the present embodiment.
Wherein：10, valve body；11, valve deck；12, valve rod；13, bellows；2, junction block；20,21, opening；22, the first spiral shellLine portion；23, the second threaded portion；3, Air Filter；4, compacting part；40, through-hole；41, third threaded portion；50, threaded elbow；51,Cap.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments：
A kind of safety valve being provided with dust-proof exhaust nozzle as shown in Figure 2,3, including safe valve body, safe valve bodyIncluding conventional arrangement of valve body 10, the valve deck 11 that 10 top of valve body is set, the valve seat that valve inner is set, it is pressed on valve seatFlap, the valve rod 12 that is connected with flap of one end, flap and valve seat can be with respect to the setting of open and close, the safety of the present embodimentValve further comprises bellows 13.
In the present embodiment：Dust-proof exhaust nozzle is provided on safe valve body, dust-proof exhaust nozzle includes both ends differenceJunction block 2, Air Filter 3 and compacting part 4 with opening 20,21.Specifically：
One end of junction block 2 is connected with the valve deck 11 of safe valve body, and a kind of connection type is：2 one end of junction blockOuter peripheral surface on be provided with the first threaded portion 22, the other end outer peripheral surface on be provided with the second threaded portion 23, junction block 2 passes through theOne the first threaded portion of threaded portion is connected with the valve deck 11 of safe valve body.In the present embodiment：Junction block 2 is a straight tube,The extending direction of the center line of junction block 2 is vertical with the extending direction of valve rod 12 of safety valve.In addition, junction block 2 is open at one end20 bore is less than the bore of its another end opening 21, and the outer diameter of one end is less than the outer diameter of its other end.
The area of Air Filter 3 is greater than another 21 opening area of end opening of junction block, it is ensured that opening 21 is completely covered.
Compacting part 4 is open at one end, the other end offers through-hole 40, is arranged on the inner peripheral surface open at one end of compacting part 4There is third threaded portion 41, the structure of such as similar nut.
When use：Air Filter 3 is covered on to the opening of 2 other end of junction block, the opening of 4 one end of compacting part is by junction blockIn 2 other ends and Air Filter 3 are coated on, and fixed by the second threaded portion 23,41 phase of third threaded portion；It again will entire dust-proof rowTracheae mouth is connected on the valve deck 11 of safe valve body by the first threaded portion 22 of junction block 2.If necessary to replace Air Filter3, compacting part 4 need to only be backed out（It is slightly exerted oneself with hand or shfting wrench）, very convenient.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with techniquePersonage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model itIt is interior.