CN215110712U

CN215110712U - Swing check valve

Info

Publication number: CN215110712U
Application number: CN202121251193.XU
Authority: CN
Inventors: 冯玉柱; 冯一宸; 李超
Original assignee: Yuanda Vavle Group Co ltd
Current assignee: Yuanda Vavle Group Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-12-10
Anticipated expiration: 2031-06-04

Abstract

The utility model discloses a swing check valve has and encloses the valve pocket that constitutes by valve body and valve gap, and the end of intaking in the valve pocket is provided with the disk seat, is fixed with a rocker shaft on the valve body, and rotatable rocker that is equipped with on the rocker shaft is fixed with on the rocker and can covers the check valve clack of pressing in order to block the runner on the disk seat. This check valve still is equipped with embedded seal structure between the sealed face of valve clack and disk seat, through realize the sealed of book shape of face in imbedding the wedge-shaped sealing part of round seal groove, sealed effect is better than the sealed effect of plane. Once the plane seal on the valve clack wears, then the part that the sealing part embedding in the seal groove is more, and the dynamics that the circle sealing layer supported and is pressed on the seal groove is bigger, and the sealed effect of folded surface is better. And the sealing layer on the valve clack is not impacted by the front of the fluid, so that the stability is better.

Description

Swing check valve

Technical Field

The utility model relates to a check valve technical field especially relates to a swing check valve.

Background

The check valve is also called as a one-way valve or a check valve, and is used for preventing media in a pipeline from flowing backwards, belongs to the automatic valve class, is mainly used for pipelines with media flowing in one direction, and only allows the media to flow in one direction so as to prevent accidents.

The existing swing check valve mainly comprises a valve body, a valve seat and a check valve flap, wherein the valve seat is provided with a valve seat sealing surface and fixed in a valve body flow channel, the check valve flap is provided with a valve flap sealing surface and installed in a valve body inner cavity by utilizing a pin shaft, when a medium enters the valve body inner cavity from an inlet side of a valve (medium flows forwards), the medium pushes the check valve flap to rotate around the pin shaft to open, and when the medium enters the valve body inner cavity from an outlet side of the valve (medium flows backwards), the check valve flap rotates around the pin shaft to close a valve port. The opening and closing piece is opened or closed by the medium flow and the force to prevent the medium from flowing backwards.

When the fluid of the swing check valve normally flows in the correct direction, the check valve flap hovers above the fluid in an almost horizontal attitude, which can be maintained due to the continuous impact force of the fluid against the front face of the check valve flap. This frontal fluid impact causes severe wear to the elastomeric seals mounted on the check valve flap surfaces, especially in the case of fluids containing small solid particles, and swing check valves often fail due to wear of the elastomeric seals.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a swing check valve that can effectively seal is provided.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a swing check valve is provided with a valve cavity formed by a valve body and a valve cover in an enclosing manner, a transverse flow channel is formed in the valve cavity, the two ends of the flow channel are divided into a water inlet end and a water outlet end, a valve seat is arranged at the water inlet end in the valve cavity, a rocker shaft is fixed on the valve body, a rocker is rotatably arranged on the rocker shaft, and a check valve clack capable of being pressed on the valve seat to block the flow channel is fixed on the rocker, and is characterized in that:

a circle of sealing groove is arranged on the end surface of one side of the valve seat facing the water outlet end,

the end face of one side, facing the water inlet end, of the check valve clack is provided with a circle of sealing part which can enter the sealing groove along with the rotation of the rocker, the inner ring surface and the outer ring surface of the sealing part are both in a wedge shape and are fixedly provided with sealing layers, and the maximum thickness of the sealing part is larger than the width of the sealing groove;

after the sealing part enters the sealing groove and moves in place, the two circles of sealing layers are pressed on the sealing groove in a propping mode, and a gap for adjusting the sealing degree is formed between the bottom of the sealing groove and the end face of the sealing part.

A further technical solution consists in that,

a first permanent magnet sheet is fixed at the bottom of the sealing groove;

the end face of one side, facing the water inlet end, of the check valve clack is provided with a circle of protective groove, a sealing ring and a return spring are arranged in the protective groove in a floating mode, one end, facing the sealing groove, of the sealing ring forms a sealing part, and the end face of the sealing part is provided with a second permanent magnet sheet which is mutually attracted with the first permanent magnet sheet;

the check valve clack rotates along with the rocker to be close to the valve seat, and under the action of magnetic field suction, the sealing part stretches the reset spring to protrude out of the protective groove and enter the sealing groove;

the check valve clack rotates along with the rocker and is far away from the valve seat, and the sealing part enters the protective groove under the action of the reset force of the reset spring.

The technical scheme is that the reset spring is sleeved on a sealing ring in the protection groove, and one end of the sealing ring in the protection groove is provided with an extended convex edge used for limiting the reset spring to be separated.

The technical scheme is that one side of the valve body is provided with a threaded counter bore, the other side of the valve body is provided with a threaded through hole coaxial with the threaded counter bore, two ends of the rocker shaft are respectively in threaded connection with the threaded counter bore and the threaded through hole, the outer end of the threaded through hole is further in threaded connection with a plug screw for tightly pushing the rocker shaft, and one end of the rocker shaft, which is positioned in the threaded through hole, is provided with a rotary joint connected with a tool.

The technical scheme is that a thread seal tape is wound on the outer wall of the stud end of the screw plug.

The further technical proposal is that the rotary joint is a square head, and a space for tools to enter is arranged between the rotary joint and the inner wall of the threaded through hole.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

this check valve still is equipped with embedded seal structure between the sealed face of valve clack and disk seat, through realize the sealed of book shape of face in imbedding the wedge-shaped sealing part of round seal groove, sealed effect is better than the sealed effect of plane. Once the plane seal on the valve clack wears, then the part that the sealing part embedding in the seal groove is more, and the dynamics that the circle sealing layer supported and is pressed on the seal groove is bigger, and the sealed effect of folded surface is better. And the sealing layer on the valve clack is not impacted by the front of the fluid, so that the stability is better.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

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

FIG. 2 is a schematic structural view of portion B of FIG. 1;

fig. 3 is a schematic structural view of a portion a-a in fig. 1.

Detailed Description

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

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 3, a swing check valve includes a valve cavity surrounded by a valve body 1 and a valve cover 2, a transverse flow passage is formed in the valve cavity, two ends of the flow passage are divided into a water inlet end and a water outlet end, a valve seat 3 is disposed at the water inlet end in the valve cavity, a rocker shaft 4 is fixed on the valve body 1, a rocker 5 is rotatably disposed on the rocker shaft 4, and a check valve flap 6 capable of covering the valve seat 3 to block the flow passage is fixed on the rocker 5. The check valve clack 6 is provided with a clack sealing surface, when a medium enters the valve cavity from the water inlet end (the medium flows in a forward direction), the medium pushes the check valve clack 6 to rotate around the rocker shaft 4 to open, when the medium enters the valve cavity from the water outlet end (the medium flows in a reverse direction), the check valve clack 6 rotates around the rocker shaft 4 to close the valve port, and the check valve clack 6 is in sealing contact with the valve seat 3. The check valve clack 6 is opened or closed automatically by medium flow and gravity to prevent the medium from flowing backwards.

In the swing check valve disclosed herein, an embedded sealing structure is further arranged between the sealing surfaces of the valve clack and the valve seat 3, a circle of sealing groove is formed in the end surface of the valve seat 3 facing one side of the water outlet end, a circle of sealing part 7 capable of entering the sealing groove along with the rotation of the rocker 5 is formed in the end surface of the check valve clack 6 facing one side of the water inlet end, the inner and outer annular surfaces of the sealing part 7 are both in a wedge shape and are fixed with a sealing layer 8, and the maximum thickness of the sealing part 7 is greater than the width of the sealing groove. In order to ensure that the sealing part 7 can smoothly enter the sealing groove when the valve clack is closed in a rotating mode, the sealing part 7 can smoothly fall out of the sealing groove when the valve clack is opened in a rotating mode, and therefore the sealing groove and the sealing part 7 are both arranged to be arc-shaped with the rocker shaft 4 as the center. When the sealing part 7 enters the sealing groove and moves in place, the two circles of sealing layers 8 are pressed on the sealing groove, and a gap for adjusting the sealing degree is formed between the bottom of the sealing groove and the end face of the sealing part 7.

Through realize the sealed of shape of a broken face with 7 embedding seal grooves of wedge-shaped sealing of round in the seal groove, sealed effect is better than the sealed effect of plane. Once the plane seal on the valve clack wears, the part that sealing 7 imbeds in the seal groove is more, and the dynamics that circle sealing layer 8 supported and presses on the seal groove is bigger, and the sealed effect of folded surface is better. And the sealing layer 8 on the valve clack is not impacted by the front of the fluid, so that the stability is better.

The seal portion 7 is provided with a floating structure to further protect the seal layer 8 on the seal portion 7. A first permanent magnet piece 9 is fixed at the bottom of the sealing groove. Check valve clack 6 has round protective tank 10 on the terminal surface towards intaking one side, and what float in protective tank 10 is equipped with a sealing ring and reset spring 12, and reset spring 12 overlaps on locating the sealing ring in protective tank 10, the one end that the sealing ring is located protective tank 10 has epitaxial, is used for restricting the protruding edge that reset spring 12 breaks away from. One end of the sealing ring facing the sealing groove forms a sealing part 7, and the end face of the sealing part 7 is provided with a second permanent magnet piece 11 mutually attracted with the first permanent magnet piece 9.

The check valve clack 6 is close to the valve seat 3 along with the rotation of the rocker 5, and under the action of magnetic field suction, the sealing part 7 stretches the reset spring 12 to protrude out of the protective groove 10 and enter the sealing groove. The check valve clack 6 is opened along with the rotation of the rocker 5 and is far away from the valve seat 3, and the sealing part 7 enters the protective groove 10 under the action of the reset force of the reset spring 12. Therefore, after the valve clack is opened, the sealing part 7 is hidden in the protective groove 10 to protect the sealing part 7 and further prevent the sealing part from being washed by fluid.

In order to solve the problem of leakage in online maintenance of the rocker shaft 4, a threaded counter bore is formed in one side of the valve body 1, a threaded through hole coaxial with the threaded counter bore is formed in the other side of the valve body 1, two ends of the rocker shaft 4 are respectively in threaded connection with the threaded counter bore and the threaded through hole, a plug screw 13 for tightly pushing the rocker shaft 4 is further in threaded connection with the outer end of the threaded through hole, and a raw material belt is wound on the outer wall of the stud end of the plug screw 13 for sealing.

And one end of the rocker shaft 4 positioned in the threaded through hole is provided with a rotary joint connected with a tool, so that the rocker shaft 4 can be conveniently installed or taken out by the tool. The swivel is in the form of a square head 401 with a space for a tool to enter between it and the inner wall of the threaded through hole. The structure has the advantages that the interface part is well sealed, the mounting and the dismounting are convenient, and the structure is suitable for popularization and use.

The above is only the preferred embodiment of the present invention, and any person can make some simple modifications, deformations and equivalent replacements according to the present invention, all fall into the protection scope of the present invention.

Claims

1. The utility model provides a swing check valve, has the valve pocket that encloses by valve body (1) and valve gap (2) and constitutes, is formed with horizontal runner in the valve pocket, divide into water end and play water end in the both ends of runner, the valve pocket is provided with disk seat (3) in the end of intaking, be fixed with rocker shaft (4) on valve body (1), rotatable rocker (5) that are equipped with on rocker shaft (4), be fixed with on rocker (5) and can cover the check valve clack (6) in order to block the runner on disk seat (3), its characterized in that:

a circle of sealing groove is arranged on the end surface of one side of the valve seat (3) facing the water outlet end,

the end face of one side, facing the water inlet end, of the check valve clack (6) is provided with a circle of sealing part (7) which can enter the sealing groove along with the rotation of the rocker (5), the inner ring surface and the outer ring surface of the sealing part (7) are both in a wedge shape and are fixedly provided with sealing layers (8), and the maximum thickness of the sealing part (7) is larger than the width of the sealing groove;

after the sealing part (7) enters the sealing groove and moves in place, the two sealing layers (8) are pressed on the sealing groove in a propping mode, and a gap for adjusting the sealing degree is formed between the bottom of the sealing groove and the end face of the sealing part (7).

2. The swing check valve of claim 1,

a first permanent magnet sheet (9) is fixed at the bottom of the sealing groove;

the end face of one side, facing the water inlet end, of the check valve clack (6) is provided with a circle of protective groove (10), a sealing ring and a return spring (12) are arranged in the protective groove (10) in a floating mode, one end, facing the sealing groove, of the sealing ring forms a sealing part (7), and the end face of the sealing part (7) is provided with a second permanent magnet sheet (11) which is mutually attracted with the first permanent magnet sheet (9);

the check valve clack (6) rotates along with the rocker (5) to be close to the valve seat (3), and under the action of magnetic field suction, the sealing part (7) stretches the reset spring (12) to protrude out of the protective groove (10) and enter the sealing groove;

the check valve clack (6) rotates along with the rocker (5) and is far away from the valve seat (3), and the sealing part (7) enters the protective groove (10) under the action of the reset force of the reset spring (12).

3. The swing check valve according to claim 2, wherein the return spring (12) is sleeved on a sealing ring in the protection groove (10), and one end of the sealing ring in the protection groove (10) is provided with an outward extending convex edge for limiting the release of the return spring (12).

4. The swing check valve according to claim 1, wherein one side of the valve body (1) is provided with a threaded counter bore, the other side of the valve body (1) is provided with a threaded through hole coaxial with the threaded counter bore, two ends of the rocker shaft (4) are respectively in threaded connection with the threaded counter bore and the threaded through hole, the outer end of the threaded through hole is further in threaded connection with a plug screw (13) for tightly pushing the rocker shaft (4), and one end of the rocker shaft (4) in the threaded through hole is provided with a rotary joint connected with a tool.

5. The swing check valve according to claim 4, wherein the screw plug (13) has a thread tape wound on the outer wall of the screw end.

6. The swing check valve according to claim 4, wherein the swivel is a square head (401) having a space for a tool to enter between it and the inner wall of the threaded through hole.