CN215596492U

CN215596492U - Three-section type guide double-seal mute check valve

Info

Publication number: CN215596492U
Application number: CN202122161546.3U
Authority: CN
Inventors: 刘向阳
Original assignee: Guangxi Kede Valve Co ltd
Current assignee: Guangxi Kede Valve Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-01-21
Anticipated expiration: 2031-09-08

Abstract

The three-section type guide double-seal silent check valve comprises a valve body, a valve plate and a valve shaft, wherein the valve plate is fixedly arranged on the valve shaft, the valve body is formed by connecting a middle valve body, a left valve body and a right valve body through flange face bolts, and the left valve body and the right valve body are both provided with flow ports; a valve shaft guide disc is installed in the flow port of the left valve body or the right valve body, a large guide disc is installed in the end, far away from the valve shaft guide disc, of the middle valve body, and two ends of the valve shaft are respectively installed in a valve shaft sliding hole of the large guide disc and an installation hole of the valve shaft guide disc in a sliding mode; the valve shaft of valve plate, far away from valve shaft guiding disc side, is equipped with the tetrafluoro cover on the cover, installs the spring in the tetrafluoro cover, and the spring housing is on the valve shaft and stretches out the tetrafluoro cover outside, and the end of the tetrafluoro cover that stretches out of spring is with big guiding disc top-connected, and the sealing connection face solid of flow opening and valve plate has the valve body cover, installs the alloy disk seat in the flow opening between valve shaft guiding disc and the valve body cover. The valve body of the check valve adopts a three-section split structure, so that the sealing element is convenient to replace, the valve plate does not deviate in movement, and the sealing is reliable.

Description

Three-section type guide double-seal mute check valve

Technical Field

The utility model relates to the technical field of fluid valves, in particular to a three-section type guide double-seal mute check valve.

Background

In the existing engineering technology, a valve is used in many occasions, and particularly in chemical engineering and hydraulic engineering, the valve is required to be used as an opening and closing element for fluid flow. In some projects, it is necessary to ensure that the fluid flows in a fixed direction and prevent the fluid from flowing backwards, and for this reason, technicians design a check valve with one-way conduction, and the fluid flows in a previously designed direction, and if the fluid flows reversely, the check valve is closed, so that the fluid flows in one direction.

The check valve is also called a one-way valve, can prevent the backflow of downstream media, and is widely applied to pipeline systems. The existing general swing check valve is provided with a disc-shaped valve clack in a valve seat, the valve clack can rotate around a rotating shaft arranged in the valve seat, when fluid medium flows backwards in a pipeline, a sealing surface of the valve clack is tightly matched with a sealing surface of the valve seat under the action of the backflow medium, so that the valve is quickly closed, and the function of preventing the medium from flowing backwards is achieved. However, when the valve is closed, because the medium backflow speed is high and the instantaneous pressure is large, the sealing surface of the valve clack impacts the sealing surface of the valve seat at a high speed, so that the sealing surface is damaged to cause internal leakage, the service life of the valve is shortened, and simultaneously, a loud sound is generated to cause a water hammer phenomenon, and the pipeline is broken in severe cases. To prevent the valve from closing quickly, the check valve is configured as a cushion check valve. The publications also report some slow-closing check valves, such as:

1. chinese patent: check valve, application No.: 200810103658.X, filing date: 2008.04.09, patentee: picrorhiza kurroa, address: 100078 Jia Xian A room 1705 in Toyotai district, Beijing, inventor: picrorhiza kurz, abstract: the utility model discloses a check valve, which comprises a valve seat and a valve clack, and further comprises a damper, wherein the damper is arranged on the wall of an inner cavity of the valve seat, the end part of the damper is connected with the valve clack through a flexible part, and reverse resistance is generated on the valve clack when the valve clack approaches the closing position of the valve clack by utilizing the damper, so that the closing speed of the valve clack is reduced, and the impact force on a sealing surface of the valve seat is reduced. The check valve has simple structure, can effectively eliminate the impact and water hammer between the valve clack and the sealing seat, and prevents the medium in the valve cavity from leaking.

2. Chinese patent: economic benefits and social benefits slow-closure check valve, application number: 201611117669.4, filing date: 2016.12.07, patentee: dalian blue energy-saving and environment-friendly technology ltd, address: 116600 Haerbin way 34-3 of developing area of Dalian economic technology in Dalian City of Liaoning province, inventor: zhao Xiao Dong, abstract: the utility model discloses a double-effect slow-closing check valve, and relates to a check valve. Before the double-effect slow-closing check valve is completely opened, the water pressure between the inlet end and the outlet end of the valve is reduced, and the hydraulic impact effect when the double-effect slow-closing check valve is completely opened is reduced. The valve core opening height of the double-effect slow-closing check valve can change along with the flow, when the double-effect slow-closing check valve is closed, under the combined action of the rotation inertia resistance of the valve core and the hydraulic piston resistance, the delay closing time of the double-effect slow-closing check valve also changes along with the flow of the water pump, the impact of a water hammer is effectively avoided, meanwhile, the double-effect slow-closing check valve can be closed in time, and the water backflow in a pipeline is avoided. The double-effect slow-closing check valve is suitable for pole-changing flow-changing water pumps in two flow operation states.

3. Chinese patent: check valve, application No.: 202110156711.8, filing date: 2021.02.04, Applicant: zhejiang Jing Yi Feng science and technology company, address: 317600 Shandong county Yuhuan, Taizhou, Zhejiang, inventor: chen xin, abstract: the utility model provides a check valve, and belongs to the technical field of valves. It has solved the great problem of current check valve during operation noise. This check valve, including valve body and case, the valve body has into water end and goes out the water end, the end setting of intaking is in the one end of valve body, it sets up on the lateral wall of valve body to go out the water end, it can promote the end of intaking of case shutoff to be equipped with spring and spring in the valve body, the other end threaded connection of valve body has the joint, the inner of joint has a plurality of convex gibs and gibs insert in the valve body, the case is located between the gib s and the lateral wall of case pastes and leans on in the inside wall of gib s. Its case of this check valve has the better and less advantage of during operation noise of direction effect.

4. Chinese patent: check valve, application No.: 201320115116.0, filing date: 2013.03.14, patentee: ningbo Huacheng valve, Inc., address: 315608 Dongdao of Huangtan town station No. 103, Ningbo City, Ninghai county, Zhejiang province, inventor: dynasty, plum static appearance, lianchaoyan, Fangjian soil, Linfangjie, abstract: the utility model discloses a check valve, relates to the technical field of valves, and realizes one-way flow control of fluid. The check valve comprises a valve body, a valve core assembly, a positioner, a spring seat and a locknut; the valve body is provided with a water inlet, a water outlet, a check valve seat and a locator hole; the method is characterized in that: the water inlet and the water outlet are separated by the valve core assembly, the non-return effect is good, and backflow pollution can be effectively prevented.

Research shows that most of the existing buffering silent check valves adopt a single pivot, so that deviation is easily caused, the operation is not stable enough, and a sealing element is damaged and is not easy to replace.

Disclosure of Invention

The utility model aims to provide a three-section type guide double-seal silent check valve, a valve body of the check valve adopts a three-section split structure, a sealing element is convenient to replace, deviation does not occur in the movement of a valve plate, and the valve plate and a valve body sleeve are soft and hard to seal, so that the check valve is reliable in sealing and stable in operation.

In order to realize the purpose of the utility model, the technical scheme is as follows:

a three-section type guide double-sealing silent check valve comprises a valve body, a valve plate and a valve shaft, wherein the valve plate is fixedly arranged on the valve shaft, the valve body is formed by connecting a middle valve body, a left valve body and a right valve body through flange face bolts, the left valve body and the right valve body are respectively arranged on the left side and the right side of the middle valve body, and the left valve body and the right valve body are both provided with flow ports; a valve shaft guide disc is installed in the flow port of the left valve body or the right valve body, a large guide disc is installed in the end, far away from the valve shaft guide disc, of the middle valve body, and two ends of the valve shaft are respectively installed in a valve shaft sliding hole of the large guide disc and an installation hole of the valve shaft guide disc in a sliding mode; the valve shaft of the valve plate far away from the valve shaft guide disc is sleeved with a polytetrafluoroethylene sleeve, one end of the polytetrafluoroethylene sleeve is connected with the valve plate in a propping manner, a spring is arranged in the other end of the polytetrafluoroethylene sleeve, the spring is sleeved on the valve shaft and extends out of the polytetrafluoroethylene sleeve, the end of the spring extending out of the polytetrafluoroethylene sleeve is connected with the large guide disc in a propping manner, and a valve body sleeve is fixedly arranged on the sealing connection surface of the flow port of the left valve body or the right valve body and the valve plate; an alloy valve seat is installed in the flow opening between the valve shaft guide disc and the valve body sleeve, namely the alloy valve seat is made of alloy materials, the alloy valve seat is in threaded connection with the flow opening, and the valve seat has the function of protecting and sealing the valve body sleeve. The valve body sleeve is made of polytetrafluoroethylene or made of polytetrafluoroethylene as required, carbon fibers are additionally added, the carbon fibers account for 10-30% of the weight of the valve body sleeve, the valve body sleeve can be directly sintered in the sealing section, and the valve body sleeve is reliable in fastening.

Further preferred is: the tetrafluoro sleeve is in threaded connection with the valve shaft, namely, a shaft neck is arranged on the valve shaft, an external thread is arranged on the shaft neck, and an internal thread is arranged in the tetrafluoro sleeve.

Further preferred is: and valve body sleeves are fixed in the left valve body and the right valve body.

Further preferred is: the large guide disc and the middle valve body are connected through welding or threads, and when welding is adopted, the large guide disc and the middle valve body are welded firmly, and then the large guide disc is machined.

Further preferred is: the large guide disc comprises a connecting ring, a connecting seat is arranged at the center of an inner ring of the connecting ring through a connecting arm, and a valve shaft sliding hole for slidably mounting the valve shaft is formed in the center of the connecting seat. When the threaded connection is adopted, the outer ring of the connecting ring is provided with an external thread which is used for being in threaded connection with the middle valve body.

Further preferred is: the valve shaft guide disc is in threaded connection with a flow port of the left valve body or the right valve body and comprises a mounting ring, a mounting sleeve is arranged at the center of an inner ring of the mounting ring through a fixing arm, and a mounting hole for slidably mounting a valve shaft is formed in the center of the mounting sleeve; and the outer ring of the mounting ring is provided with an external thread which is used for being in threaded connection with the flow opening of the left valve body or the right valve body.

Further preferred is: the outer end of the flow port of the mounting hole is provided with a sealing plate, a fluid through hole is formed in the sealing plate, and the diameter of the fluid through hole is smaller than that of the mounting hole.

This syllogic direction double containment silence check valve's advantage does:

1. this syllogic direction double containment silence check valve structure sets up ingeniously, and valve plate fixed mounting is on the valve shaft, and the both ends difference slidable mounting of valve shaft has the double bracing in the valve shaft sliding hole of big guiding disc and the mounting hole of valve shaft guiding disc, valve shaft, and the difficult emergence deviation of valve plate motion adopts valve plate and the soft or hard double containment of valve body cover, and is sealed reliable, operates steadily.

2. The valve body adopts a three-section split structure, so that the replacement of a sealing element and the replacement and maintenance of parts in the valve body are facilitated.

3. The outer end of the flow opening of the mounting hole is provided with a sealing plate, a fluid through hole is formed in the sealing plate, the diameter of the fluid through hole is smaller than that of the mounting hole, when the valve is opened, fluid enters the mounting hole from the fluid through hole, and when the valve is closed, the fluid is slowly discharged from the mounting hole through the fluid through hole due to extrusion of the valve shaft, so that a certain buffering effect is achieved.

Drawings

Fig. 1 is a schematic structural view of the three-section type guiding double-sealing silent check valve;

FIG. 2 is a schematic structural view of the large guide plate of FIG. 1;

FIG. 3 is a schematic illustration of the structure of the valve shaft pilot disk of FIG. 1;

FIG. 4 is a schematic view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of the tetrafluoro sleeve of FIG. 1;

FIG. 6 is a schematic structural view of the valve shaft of FIG. 1;

fig. 7 is a schematic structural view of a three-section type guide double-seal silent check valve in embodiment 3;

the names corresponding to the sequence numbers in the figure are:

1. the valve comprises a left valve body, a valve body sleeve, a large guide disc, a middle valve body, a valve seat, an alloy valve seat, a right valve body, a valve shaft guide disc, a valve plate, a polytetrafluoroethylene sleeve, a spring, a valve shaft, a sealing plate, a fluid through hole, a connecting ring, a connecting seat, a valve shaft sliding hole, a connecting arm, a mounting ring, a fixing arm, a mounting sleeve, a mounting hole and a connecting seat, wherein the valve shaft sliding hole is formed in the connecting seat, the connecting arm, the mounting ring, the mounting sleeve and the mounting sleeve.

Detailed Description

The technical solution of the present invention is described clearly and completely with reference to the following embodiments, which are only a part of the present invention, but not all of the embodiments.

Example 1

A three-section type guide double-seal mute check valve comprises a valve body, a valve plate 8 and a valve shaft 11, wherein the valve plate 8 is fixedly installed on the valve shaft 11, the valve body is formed by connecting a middle valve body 4, a left valve body 1 and a right valve body 6 through flange face bolts, the left valve body 1 and the right valve body 6 are respectively installed on the left side and the right side of the middle valve body 4, and the left valve body 1 and the right valve body 6 are both provided with a flow port; a valve shaft guide disc 7 is installed in a flow port of the left valve body 1 or the right valve body 6, a large guide disc 3 is installed in the end, far away from the valve shaft guide disc 7, of the middle valve body 4, and two ends of a valve shaft 11 are respectively installed in a valve shaft sliding hole 16 of the large guide disc 3 and an installation hole 21 of the valve shaft guide disc 7 in a sliding mode; the cover is equipped with tetrafluoro cover 9 on valve shaft 11 of valve shaft guiding disc 7 side of keeping away from of valve plate 8, and the one end and the valve plate 8 top of tetrafluoro cover 9 connect, installs spring 10 in the other end of tetrafluoro cover 9, and spring 10 overlaps on valve shaft 11 and stretches out outside tetrafluoro cover 9, and the end that stretches out tetrafluoro cover 9 of spring 10 connects with 3 tops of big guiding disc, and the mouth of flowing of left valve body 1 or right valve body 6 and the sealing connection face solid of valve plate 8 have valve body cover 2, valve shaft guiding disc 7 and valve body cover 2 between the mouth of flowing in install alloy disk seat 5.

Example 2

The tetrafluoro sleeve 9 is in threaded connection with the valve shaft 11, namely, a shaft neck is arranged on the valve shaft 11, an external thread is arranged on the shaft neck, and an internal thread is arranged in the tetrafluoro sleeve 9.

And a valve body sleeve 2 is fixed in the left valve body 1 and the right valve body 6.

The large guide disc 3 and the middle valve body 4 are connected in a welding mode.

The large guide disc 3 comprises a connecting ring 14, a connecting seat 15 is arranged at the center of the inner ring of the connecting ring 14 through a connecting arm 17, and a valve shaft sliding hole 16 for slidably mounting the valve shaft 11 is arranged at the center of the connecting seat 15.

The valve shaft guide disc 7 is in threaded connection with a flow port of the left valve body 1 or the right valve body 6 and comprises a mounting ring 18, the center of the inner ring of the mounting ring 18 is provided with a mounting sleeve 20 through a fixing arm 19, and the center of the mounting sleeve 20 is provided with a mounting hole 21 for slidably mounting the valve shaft 11; and the outer ring of the mounting ring 18 is provided with an external thread which is used for being in threaded connection with the flow port of the left valve body 1 or the right valve body 6.

Example 3

The large guide disc 3 is connected with the middle valve body 4 by welding or threads.

The large guide disc 3 comprises a connecting ring 14, the center of the inner ring of the connecting ring 14 is provided with a connecting seat 15 through a connecting arm 17, and the center of the connecting seat 15 is provided with a valve shaft sliding hole 16 for slidably mounting the valve shaft 11; when the threaded connection is adopted, the outer ring of the connecting ring 14 is provided with an external thread for being in threaded connection with the intermediate valve body 4.

The outer end of the flow port of the mounting hole 21 is provided with a sealing plate 12, the sealing plate 12 is provided with a fluid through hole 13, and the diameter of the fluid through hole 13 is smaller than that of the mounting hole 21.

The working principle of the three-section type guide double-seal mute check valve is as follows: fluid medium enters from a flow port at the end of a valve shaft guide disc 7 to push a valve plate 8 to drive a valve shaft 11 to move backwards in a valve shaft sliding hole 16 and a mounting hole 21, a spring 10 presses a large guide disc 3, a valve is opened, a medium streamline passes through, an alloy valve seat 5 plays a role in protecting a valve body sleeve 2 to prevent fluid from directly scouring the valve body sleeve 2 for sealing, when the valve is closed, the fluid medium reversely flows back, the spring 10 returns to enable the valve plate 8 to be rapidly sealed, the valve plate 8 is stressed mainly by the return force of the spring 10 at the moment, the valve plate 8 is in contact sealing with the valve body sleeve 2, the valve body sleeve 2 plays a role in sealing and noise elimination, then a large amount of backflow medium is isolated, the valve shaft 11 moves, two ends of the valve shaft are fixedly slid, the operation is stable, and when the pressure of the fluid medium is increased, the valve plate 8 and the valve body sleeve 2 are tightly attached and sealed. The sealing plate 12 is provided with a fluid through hole 13, the diameter of the fluid through hole 13 is smaller than that of the mounting hole 21, when the valve is opened, fluid enters the mounting hole 21 from the fluid through hole 13, and when the valve is closed, the fluid is slowly discharged from the mounting hole 21 through the fluid through hole 13 due to the extrusion of the valve shaft 11, so that a certain buffering effect is achieved.

The above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.

Claims

1. The utility model provides a syllogic direction double containment silence check valve, includes valve body, valve plate (8) and valve shaft (11), valve plate (8) fixed mounting on valve shaft (11), its characterized in that: the valve body is formed by connecting a middle valve body (4), a left valve body (1) and a right valve body (6) through flange face bolts, the left valve body (1) and the right valve body (6) are respectively arranged on the left side and the right side of the middle valve body (4), and the left valve body (1) and the right valve body (6) are provided with flow ports; a valve shaft guide disc (7) is installed in a flow port of the left valve body (1) or the right valve body (6), a large guide disc (3) is installed in the end, far away from the valve shaft guide disc (7), of the middle valve body (4), and two ends of a valve shaft (11) are respectively installed in a valve shaft sliding hole (16) of the large guide disc (3) and an installation hole (21) of the valve shaft guide disc (7) in a sliding mode; a tetrafluoro sleeve (9) is sleeved on a valve shaft (11) of the valve plate (8) far away from the side of the valve shaft guide disc (7), one end of the tetrafluoro sleeve (9) is abutted with the valve plate (8), a spring (10) is installed in the other end of the tetrafluoro sleeve (9), the spring (10) is sleeved on the valve shaft (11) and extends out of the tetrafluoro sleeve (9), the end, extending out of the tetrafluoro sleeve (9), of the spring (10) is abutted with the large guide disc (3), and a valve body sleeve (2) is fixedly arranged on the sealing connection surface of a flow port of the left valve body (1) or the right valve body (6) and the valve plate (8); an alloy valve seat (5) is arranged in a flow opening between the valve shaft guide disc (7) and the valve body sleeve (2).

2. The three-section type guide double-seal silent check valve as claimed in claim 1, wherein: the tetrafluoro sleeve (9) is in threaded connection with the valve shaft (11).

3. The three-section type guide double-seal silent check valve as claimed in claim 1, wherein: and a valve body sleeve (2) is fixed in the left valve body (1) and the right valve body (6).

4. The three-section type guide double-seal silent check valve as claimed in claim 1, wherein: the large guide disc (3) is connected with the middle valve body (4) by welding or threads.

5. The three-section type guide double-seal silent check valve as claimed in claim 1 or 4, wherein: the large guide disc (3) comprises a connecting ring (14), a connecting seat (15) is arranged at the center of an inner ring of the connecting ring (14) through a connecting arm (17), and a valve shaft sliding hole (16) for slidably mounting the valve shaft (11) is formed in the center of the connecting seat (15).

6. The three-section type guide double seal silent check valve as claimed in claim 5, wherein: the outer ring of the connecting ring (14) is provided with an external thread which is used for being in threaded connection with the middle valve body (4).

7. The three-section type guide double-seal silent check valve as claimed in claim 1, wherein: the valve shaft guide disc (7) is in threaded connection with a flow port of the left valve body (1) or the right valve body (6) and comprises a mounting ring (18), the center of an inner ring of the mounting ring (18) is provided with a mounting sleeve (20) through a fixing arm (19), and the center of the mounting sleeve (20) is provided with a mounting hole (21) for slidably mounting the valve shaft (11); and the outer ring of the mounting ring (18) is provided with an external thread which is used for being in threaded connection with the flow port of the left valve body (1) or the right valve body (6).

8. The three-section type guide double seal silent check valve as claimed in claim 7, wherein: the outer end of the flow port of the mounting hole (21) is provided with a sealing plate (12), the sealing plate (12) is provided with a fluid through hole (13), and the diameter of the fluid through hole (13) is smaller than that of the mounting hole (21).