CN211175410U

CN211175410U - Screw thread type meter front double check valve

Info

Publication number: CN211175410U
Application number: CN201921351343.7U
Authority: CN
Inventors: 李陈燕; 郑成超
Original assignee: Shanghai Yucheng Fluid Control Co ltd
Current assignee: Shanghai Yucheng Fluid Control Co ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-08-04
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a two check valves before table of screw thread formula, which comprises a valve body, the equal threaded connection in both sides of valve body has the connecting pipe, the bearing has been cup jointed to the outside of connecting pipe, the straight thread sleeve has been cup jointed to the outer ring of bearing, the inboard of valve body is equipped with the disk seat, the inside fixedly connected with countershaft and the valve shaft of valve body, valve clack and torsional spring have been cup jointed to the outside of valve shaft, valve clack and torsional spring all are provided with two sets ofly, one side at the valve clack is hugged closely to the one end of torsional spring, the other end lock joint of torsional spring is in the outside of countershaft, one side at the disk seat is hugged. The utility model discloses a threaded connection has the connecting pipe in the both sides of valve body, passes through the straight thread sleeve of bearing installation in the outside of connecting pipe, when with the pipe connection, twist the pipeline into the straight thread sleeve through rotating the straight thread sleeve and dock with the connecting pipe to the installation of the valve body of being convenient for.

Description

Screw thread type meter front double check valve

Technical Field

The utility model relates to a check valve technical field specifically is a two check valves before table of screw thread formula.

Background

The oppositely clamped double-flap check valve is used for pure pipelines and industrial, environment-friendly and water treatment pipelines of high-rise buildings, and prevents media from reversely flowing. The check valve adopts a wafer type, the butterfly plate is two semicircles, the butterfly plate is forced to reset by a spring, a sealing surface can be made of a body surfacing wear-resistant material or lining rubber, the use range is wide, and the sealing is reliable. The check valve is a valve that is opened or closed by the medium flowing and force to prevent the medium from flowing backwards. The check valve belongs to the automatic valve class, is mainly used on the pipeline of medium one-way flow, only allows medium to flow to one direction to prevent the accident. The check valve is divided into three types, namely a lifting check valve, a swing check valve and a butterfly check valve according to the structure. The lift check valve can be divided into a vertical type and a horizontal type. The swing check valve is divided into a single-flap type, a double-flap type and a multi-flap type. The butterfly check valve is a straight-through type, and the connection form of the check valves can be divided into three types, namely threaded connection, flange connection and welding. The check valve is a valve which can automatically prevent the reverse flow of fluid. The flap of the check valve opens under fluid pressure, which flows from the inlet side to the outlet side. When the pressure at the inlet side is lower than that at the outlet side, the valve clack automatically closes under the action of fluid pressure difference, self gravity and other factors to prevent the fluid from flowing backwards.

At present, when installing the check valve, adopt flange, bolt fastening's mode mostly, increase the sealing washer between the flange and improve sealed effect, but because after long-time the use, the sealing washer harms easily, the condition of leaking appears. To this end, we propose a screw-type double check valve in front of the meter.

Disclosure of Invention

An object of the utility model is to provide a two check valves before table of screw thread formula, through the both sides threaded connection connecting pipe at the valve body, pass through the straight thread sleeve of bearing installation in the outside of connecting pipe, when with the pipe connection, twist the pipeline into the straight thread sleeve through rotating straight thread sleeve and dock with the connecting pipe to the installation of the valve body of being convenient for improves the leakproofness of pipeline and valve body simultaneously, with the problem of proposing in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a two check valves before table of screw thread formula, includes the valve body, the equal threaded connection in both sides of valve body has the connecting pipe, the bearing has been cup jointed to the outside of connecting pipe, the straight thread sleeve has been cup jointed to the outer ring of bearing, the inboard of valve body is equipped with the disk seat, the inside fixedly connected with countershaft and the valve shaft of valve body, valve clack and torsional spring have been cup jointed to the outside of valve shaft, valve clack and torsional spring all are provided with two sets ofly, the one side at the valve clack is hugged closely to the one end of torsional spring, the other end lock joint of torsional spring is in the outside of countershaft, one side at the.

Preferably, a connecting piece is inserted into the connecting pipe, and the connecting piece comprises an insertion pipe and a sleeve.

Preferably, the diameter of the sleeve is the same as that of the connecting pipe, and the two ends of the sleeve are provided with sealing rings.

Preferably, a sealing gasket is bonded to one side of the valve seat.

Preferably, the external part of the straight thread sleeve is welded with the convex blocks.

Preferably, the rubber sleeve is sleeved outside the protruding block, and the surface of the rubber sleeve is provided with anti-skid lines.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has the advantages that the connecting pipes are connected with the threads on the two sides of the valve body, the straight thread sleeve is arranged outside the connecting pipes through the bearing, and when the connecting pipes are connected with a pipeline, the pipeline is screwed into the straight thread sleeve to be butted with the connecting pipes by rotating the straight thread sleeve, so that the valve body is convenient to install, and the sealing performance of the pipeline and the valve body is improved;

2. the utility model discloses a countershaft and valve shaft are fixed a position torsional spring and valve clack, and the valve clack receives the extrusion of torsional spring and hugs closely in disk seat one side, is favorable to improving the leakproofness of check valve, and mobility.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic sectional view of the valve body of the present invention;

fig. 3 is a schematic view of a cross-sectional structure of the connecting member of the present invention.

In the figure: 1. a valve body; 2. a connecting pipe; 3. a bearing; 4. a straight threaded sleeve; 5. a connecting member; 6. a valve seat; 7. a valve flap; 8. a torsion spring; 9. a counter shaft; 10. a valve shaft; 11. inserting a tube; 12. a sleeve; 13. a seal ring; 14. a gasket; 15. a raised block; 16. a rubber sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a threaded front double check valve comprises a valve body 1, wherein connecting pipes 2 are in threaded connection with two sides of the valve body 1, threads are arranged on two sides of the valve body 1, the connecting pipes 2 are in threaded connection with the valve body 1, the valve body 1 and the connecting pipes 2 are convenient to assemble, a bearing 3 is sleeved outside the connecting pipes 2, the bearing 3 is a sealing bearing and can prevent rusting, an inner ring of the bearing 3 is welded outside the connecting pipes 2, a straight thread sleeve 4 is sleeved on an outer ring of the bearing 3, the straight thread sleeve 4 is welded with an outer ring of the bearing 3, the stability between the connecting pipes 2 and the bearing 3 is improved, a valve seat 6 is arranged on the inner side of the valve body 1, the valve seat 6 is matched with a valve clack 7, the valve clack 7 is centered on a valve shaft 10, two groups are symmetrically arranged, and an auxiliary shaft 9 and the valve shaft 10 are fixedly connected inside the valve body 1, the valve shaft 10 is provided with a valve clack 7 and a torsion spring 8 in a sleeved mode, the valve clack 7 and the torsion spring 8 are both provided with two groups, one end of the torsion spring 8 is tightly attached to one side of the valve clack 7, the other end of the torsion spring 8 is buckled on the outer portion of an auxiliary shaft 9, and the other side of the valve clack 7 is tightly attached to one side of a valve seat 6.

Specifically, a connecting piece 5 is inserted into the connecting tube 2, and the connecting piece 5 includes an insertion tube 11 and a sleeve 12. The cannula 11 is inserted in the connecting tube 2 and the pipe and the sleeve 12 facilitates the abutment between the connecting tube 2 and the pipe.

Specifically, the diameter of the sleeve 12 is the same as that of the connecting pipe 2, and the two ends of the sleeve 12 are both provided with the sealing rings 13. The sealing ring 13 is advantageous for improving the sealing between the connecting pipe 2 and the pipe and the connecting piece 5.

Specifically, a gasket 14 is bonded to one side of the valve seat 6. The sealing gasket 14 is beneficial to improving the sealing performance of the valve seat 6 and the valve clack 7 and improving the non-return effect.

Specifically, the external part of the straight thread sleeve 4 is welded with a convex block 15. The two sets of bumps 15 facilitate the rotation of the straight threaded sleeve 4.

Specifically, the rubber sleeve 16 is sleeved outside the protruding block 15, and the surface of the rubber sleeve 16 is provided with anti-slip lines. The rubber sleeve 16 is beneficial to improving the comfort of the hand.

The working principle is as follows: during the use, pass through threaded connection with connecting pipe 2 on valve body 1, insert connecting pipe 2 to the one end of connecting piece 5, then dock the pipeline in direct thread sleeve 4, through rotating direct thread sleeve 4, twist the pipeline into direct thread sleeve 4, can dock with connecting pipe 5 after the pipeline enters into direct thread sleeve 4, then screw up thread sleeve 4, improve the leakproofness between takeover 2 and pipeline and the connecting piece 5, be convenient for valve body 1's installation, valve clack 7 receives 8 extrusion and hugs closely in 6 one sides of disk seat, be favorable to improving the leakproofness of check valve, and flexibility.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a two check valves before table of screw thread formula, includes valve body (1), its characterized in that: the equal threaded connection in both sides of valve body (1) has connecting pipe (2), bearing (3) have been cup jointed to the outside of connecting pipe (2), straight thread sleeve (4) have been cup jointed to the outer ring of bearing (3), the inboard of valve body (1) is equipped with disk seat (6), the inside fixedly connected with countershaft (9) and valve shaft (10) of valve body (1), valve clack (7) and torsional spring (8) have been cup jointed to the outside of valve shaft (10), valve clack (7) and torsional spring (8) all are provided with two sets ofly, one side at valve clack (7) is hugged closely to the one end of torsional spring (8), the other end lock joint of torsional spring (8) is in the outside of countershaft (9), the opposite side at valve seat (6) is hugged closely to the opposite side of valve clack (7).

2. The threaded watch front double check valve as recited in claim 1, wherein: the connecting piece (5) is inserted in the connecting pipe (2), and the connecting piece (5) comprises an insertion pipe (11) and a sleeve (12).

3. The threaded watch front double check valve as recited in claim 2, wherein: the diameter of the sleeve (12) is the same as that of the connecting pipe (2), and sealing rings (13) are arranged at two ends of the sleeve (12).

4. The threaded watch front double check valve as recited in claim 1, wherein: and a sealing gasket (14) is bonded on one side of the valve seat (6).

5. The threaded watch front double check valve as recited in claim 1, wherein: the outer part of the straight thread sleeve (4) is welded with a convex block (15).

6. The threaded watch front double check valve as recited in claim 5, wherein: the rubber sleeve (16) is sleeved outside the protruding block (15), and anti-skid grains are arranged on the surface of the rubber sleeve (16).