CN205350697U

CN205350697U - Vertical check valve anti -back suction device

Info

Publication number: CN205350697U
Application number: CN201521058830.6U
Authority: CN
Inventors: 赵向阳; 尚俊杰; 谷金灿
Original assignee: Shanghai Scc Fine Chemicals Co Ltd
Current assignee: Shanghai Scc Fine Chemicals Co Ltd
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2016-06-29
Anticipated expiration: 2025-12-18

Abstract

The utility model discloses a vertical check valve anti -back suction device, including the tee pipe coupling, the tee pipe coupling respectively with the end -to -end connection of no. Two pipes of top and gas input of the end of an input tube of high -pressure steam, no. Two input tubes of high -pressure steam, the input of a check valve of end -to -end connection of no. Two input tubes of high -pressure steam, the output of a check valve passes through the pipe connection water tank, the top and the output of no. Two check valves of no. Two pipes of gas input are connected, are connected with pipe of gas input at the input of no. Two check valves. The utility model discloses a cooperation of a check valve, no. Two check valves can effectively be avoided a check valve department upstream pressure to appear and reduce to because of the sealed suck -back problem that does not sternly cause of the quality problems of check valve after the negative pressure, prevents consequently and the accident that causes.

Description

A kind of vertical check valve suck-back device

Technical field

This utility model relates to valve applications technical field, specifically a kind of vertical check valve suck-back device.

Background technology

Check valve is that fluid can only flow along water inlet, and outlet medium but cannot reflux, and is commonly called as check valve.Check valve is also known as check-valves or non-return valve.For hydraulic system prevents oil stream reverse flow, or for pneumatic system prevents compression air reverse flow, check valve has through type and right-angle type two kinds, straight check valve is arranged on pipeline with threaded, and angle check valve has connection threaded, board-like and three kinds of forms of Flange joint.

In the industrial production; often use check valve; the use of check valve can derive high steam to water on the one hand effectively; the generation water suck-back when check valve upstream pressure is reduced to negative pressure can also be prevented on the other hand; but in actual use, run into some check valves off quality sometimes, in the problem occurring causing water suck-back after check valve upstream pressure reduces; and once there occur a phenomenon in which, it will cause unnecessary loss.

Summary of the invention

The purpose of this utility model is in that to provide a kind of vertical check valve suck-back device, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, this utility model provides following technical scheme:

A kind of vertical check valve suck-back device, including tee pipe coupling, described tee pipe coupling is connected with the end of a number input pipe of high steam, the top of No. two input pipes of high steam and the end of gas No. two pipes of input respectively, the end of No. two input pipes of high steam connects the input of a check valve, the outfan of a number check valve connects water tank by pipeline, the top of gas No. two pipes of input and the outfan of No. two check valves connect, and the input at No. two check valves is connected to a gas number pipe of input.

As further program of the utility model: number input pipe of described high steam, gas input No. two pipes, gas inputs a pipe and No. two input pipes of high steam are metal tube.

As further program of the utility model: the top of a described gas number pipe of input and atmosphere.

Compared with prior art, this utility model is by the cooperation of a check valve, No. two check valves, the suck-back problem that a check valve place occurs that upstream pressure causes because the quality problems of check valve are poorly sealed after being reduced to negative pressure can be prevented effectively from, it is prevented that the accident therefore caused.

Accompanying drawing explanation

Fig. 1 is the structural representation of vertical check valve suck-back device.

In figure: 1-water tank, number check valve of 2-, No. bis-check valves of 3-, number input pipe of 4-high steam, 5-tee pipe coupling, 6-gas input No. two pipes, 7-gas input number pipe, No. two input pipes of 8-high steam.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.

Refer to Fig. 1, in this utility model embodiment, a kind of vertical check valve suck-back device, including tee pipe coupling 5, described tee pipe coupling 5 respectively with the end of a number input pipe 4 of high steam, the end of the top of No. two input pipes 8 of high steam and gas No. two pipes 6 of input connects, the end of No. two input pipes 8 of high steam connects the input of a check valve 2, the outfan of a number check valve 2 connects water tank 1 by pipeline, the top of gas No. two pipes 6 of input and the outfan of No. two check valves 3 connect, input at No. two check valves 3 is connected to a gas number pipe 7 of input.Number input pipe 4 of described high steam, gas input No. two pipes 6, a gas number pipe 7 of input and No. two input pipes 8 of high steam and are metal tube.The top of a described gas number pipe 7 of input and atmosphere.

One tee pipe coupling 5 is installed in the upstream of a check valve 2, then No. two check valves 3 are additionally installed additional at tee pipe coupling 5 side pipe position, make it directly and atmosphere, installation direction with towards check valve 2 contrast in water, under this mounting means, when check valve 3 upstream pressure increases, unnecessary steam just can import in water tank；On the contrary, when upstream pressure reduces, turning on atmosphere No. two check valves 3, making upstream negative pressure release, thus efficiently avoid suck-back problem.

This utility model is by the cooperation of a check valve, No. two check valves, it is possible to be prevented effectively from the suck-back problem that a check valve place occurs that upstream pressure causes because the quality problems of check valve are poorly sealed after being reduced to negative pressure, it is prevented that the accident therefore caused.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and when without departing substantially from spirit of the present utility model or basic feature, it is possible to realize this utility model in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in this utility model.Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.

In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.

Claims

1. a vertical check valve suck-back device, including tee pipe coupling, it is characterized in that, described tee pipe coupling is connected with the end of a number input pipe of high steam, the top of No. two input pipes of high steam and the end of gas No. two pipes of input respectively, the end of No. two input pipes of high steam connects the input of a check valve, the outfan of a number check valve connects water tank by pipeline, the top of gas No. two pipes of input and the outfan of No. two check valves connect, and the input at No. two check valves is connected to a gas number pipe of input.

2. the vertical check valve suck-back device of one according to claim 1, it is characterised in that number input pipe of described high steam, gas input No. two pipes, gas inputs a pipe and No. two input pipes of high steam are metal tube.

3. the vertical check valve suck-back device of one according to claim 1, it is characterised in that the top of a described gas number pipe of input and atmosphere.