CN219692342U

CN219692342U - Lifting check valve

Info

Publication number: CN219692342U
Application number: CN202321208192.6U
Authority: CN
Inventors: 李志朋; 羊山百; 谢奎; 代富阳; 周德胜; 曾燕; 余应洪
Original assignee: Chengdu Xinsanye Technology Co ltd
Current assignee: Chengdu Xinsanye Technology Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-09-15
Anticipated expiration: 2033-05-18

Abstract

The utility model provides a lifting check valve, and belongs to the technical field of check valve valves. Including valve body, valve gap, valve clack and elastic component, be equipped with the medium runner of intercommunication valve body both ends open-ended in the valve body, the roof of valve body has offered the installation cavity of intercommunication medium runner downwards, and the valve gap can be dismantled and set up at the valve body top, and the valve clack setting is in the installation cavity and through vertical elevating motion in order to open and close the medium runner, still includes the sealing washer, and the sealing washer is equipped with the multiturn along the circumference coaxial of medium runner and installation cavity intercommunication opening part, and the one end that the valve clack is located the installation cavity outwards coaxial extension is provided with sealed step. By utilizing the sealing step sealing contact of at least three layers of sealing rings in the installation cavity and the bottom of the valve clack, when impurities in the check valve are in contact with the sealing rings and the sealing rings are pressed and deformed, other sealing rings can still continuously play a role in sealing the check valve, and the check valve has the advantage of improving the check sealing effect of the check valve.

Description

Lifting check valve

Technical Field

The utility model relates to the technical field of check valve valves, in particular to a lifting check valve.

Background

The check valve is a valve with a circular valve clack as an opening and closing part and can stop the medium from flowing backwards by the action of the self weight and the medium pressure. Belongs to automatic valves, which are also called check valves, one-way valves, reflux valves or isolation valves. The lifting check valve is similar to a stop valve in structure, medium in a flow passage in the valve body flows in from an inlet end (lower side) and flows out from an outlet end (upper side), when the inlet pressure is greater than the sum of the weight of the valve clack and the flow resistance of the valve clack, the valve is opened, and otherwise, the valve is closed when the medium flows back.

However, in the use process of the check valve, impurities are easily brought into a medium in a pipeline, the impurities are rusted from a medium source or the inner wall of the pipeline, when the impurities are pressed between the valve clack and the flow passage in the check valve by the valve clack in the check valve, gaps are easily formed between the valve clack and the flow passage, and the check valve is not tightly sealed.

Disclosure of Invention

In view of the above, the present utility model provides a lifting check valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a lift check valve, including the valve body, the valve gap, valve clack and elastic component, be equipped with the medium runner of intercommunication valve body both ends open-ended in the valve body, the mounting chamber of intercommunication medium runner has been seted up downwards to the roof of valve body, the valve gap can be dismantled and set up at the valve body top and be used for closing the mounting chamber, the valve clack setting is in the mounting chamber and through vertical elevating movement with switching medium runner, the elastic component sets up between valve clack and valve gap in order to order about the valve clack to move down and close the medium runner, still include the sealing washer, the sealing washer is equipped with the multiturn along the circumference coaxial of medium runner and mounting chamber intercommunication opening part, the sealing washer is fixed to be set up in the mounting chamber, the outside coaxial extension of one end that the valve clack is located the mounting chamber is provided with seal step, seal step and sealing washer sealing contact when the valve clack closes the medium runner.

Further, the water-blocking cover comprises an auxiliary sealing assembly, the auxiliary sealing assembly comprises a movable sealing plug and a water-blocking cover, the water-blocking cover is hollow, the movable sealing plug is movably arranged in the water-blocking cover, the water-blocking cover vertically penetrates through and is provided with a water passing hole, the movable sealing plug can seal the water passing hole at the bottom of the water-blocking cover, and the top of the water-blocking cover is provided with a plurality of water passing strips communicated with the inside of the water-blocking cover at intervals along the edge of the water passing hole.

Further, one surface, close to the water hole at the top, of the inside of the water blocking cover is set to be an inclined surface, and the top of the movable sealing plug can be contacted with the inclined surface of the inside of the water blocking cover.

Further, the movable sealing plug is made of alumina ceramic.

Further, an installation step matched with the size of the water-blocking cover is formed in the edge of an opening, which passes through the medium flow channel, on the inner bottom wall of the installation cavity along the medium flow channel, an installation sheet is integrally and fixedly arranged above the water-blocking cover, the installation sheet is fixedly connected with the valve body through a bolt, and the sealing ring is arranged on the top wall of the installation sheet.

Further, the screw rod is worn to be equipped with by the screw thread on the valve gap, and the coaxial fixedly connected with handle of one end of screw rod, the other end stretch into in the installation cavity and fixedly connected with pressure disk, and the one end and the valve clack butt of elastic component, the other end and pressure disk butt.

The beneficial effects of the utility model are as follows:

1. by utilizing the sealing step sealing contact of at least three layers of sealing rings in the installation cavity and the bottom of the valve clack, when impurities in the check valve are in contact with the sealing rings and the sealing rings are pressed and deformed, other sealing rings can still continuously play a role in sealing the check valve, and the sealing effect of the check valve is greatly improved.

2. By adopting the water blocking cover and the movable sealing plug structure, the impact force of medium fluid on the valve clack and the valve body when the check valve is opened can be buffered, so that the medium can slowly pass through the valve clack, the vibration problem of the check valve is reduced, and the service life of the check valve is prolonged.

Drawings

Fig. 1 is a schematic view showing an internal cross-sectional structure of a check valve according to an embodiment of the present utility model.

Fig. 2 is an enlarged partial schematic view of the portion a in fig. 1.

Fig. 3 is a schematic perspective view of a water blocking cover according to an embodiment of the present utility model.

Wherein, 1, the valve body; 11. a media flow path; 12. a mounting chamber; 121. mounting steps; 13. a plugging ring; 2. a valve cover; 3. a valve flap; 31. a sealing step; 4. an elastic member; 5. a seal ring; 6. a movable sealing plug; 7. a water blocking cover; 71. a water passing hole; 72. water passing strips; 73. a mounting piece; 8. a screw; 81. a handle; 82. and (3) pressing a plate.

Detailed Description

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

The embodiment of the utility model discloses a lifting check valve, which comprises a valve body 1, a valve cover 2, a valve clack 3 and an elastic piece 4, wherein the two ends of the valve body 1 are respectively provided with a water inlet and a water outlet, a medium flow passage 11 which is communicated with the water inlet and the water outlet at the two ends of the valve body 1 is also arranged in the valve body 1, the medium flow passage 11 is vertically arranged in the middle part of the valve body 1, the water inlet is connected with the lower end of the medium flow passage 11, and the water outlet is connected with the higher end of the medium flow passage 11. The top wall of the valve body 1 is further vertically provided with an installation cavity 12, the installation cavity 12 is communicated with a vertical section of the medium flow channel 11, the medium flow channel 11 is connected with communication ports on the inner bottom wall of the installation cavity 12 and the side wall of the installation cavity 12, the valve clack 3 is vertically and movably arranged in the installation cavity 12, and the valve clack 3 can open and close the communication ports on the inner bottom wall of the installation cavity 12. The valve cover 2 is fixedly connected to the top of the valve body 1 through bolts to seal the mounting cavity 12, the elastic element 4 is arranged in the mounting cavity 12 and positioned between the valve cover 2 and the valve clack 3, and the elastic element 4 drives the valve clack 3 to seal the medium flow passage 11.

In the embodiment of the utility model, the sealing ring 5 is further arranged in the mounting cavity 12, the sealing ring 5 is coaxially provided with a plurality of circles along the circumference of the communication opening of the medium flow channel 11 and the mounting cavity 12, the sealing ring 5 is at least three circles, the upper edges of the plurality of circles of sealing rings 5 are all on the same horizontal plane, one end, positioned in the mounting cavity 12, of the valve clack 3 is outwardly and coaxially extended and provided with a sealing step 31, and when the valve clack 3 closes the medium flow channel 11, the sealing step 31 is in sealing contact with the sealing ring 5. Through valve clack 3 and the sealing washer 5 sealing contact of multiturn, when impurity in the medium is pressed between valve body 1 and valve clack 3, the partial sealing washer 5 in the installation cavity 12 is pressed and is warp, and other sealing washer 5 that does not contact with impurity still can contact with the sealing step 31 of valve clack 3, still plays reliable sealed partition effect to medium runner 11.

Referring to fig. 3, further, an auxiliary sealing assembly is further provided in the valve body 1, the auxiliary sealing assembly includes a movable sealing plug 6 and a water blocking cover 7, the water blocking cover 7 is hollow, the water blocking cover 7 vertically penetrates through to form a water passing hole 71, the movable sealing plug 6 is movably installed in the water blocking cover 7, the size of the movable sealing plug 6 is larger than the water passing hole 71 and smaller than the inner diameter of the water blocking cover 7, so that the movable sealing plug 6 can seal the water passing hole 71 at the bottom of the water blocking cover 7 when falling. The top of the water blocking cover 7 is provided with a plurality of water passing bars 72 which are communicated with the inside of the water blocking cover 7 at intervals along the edge of the water passing hole 71. When flowing medium at the water inlet in the valve body 1 enters and lifts up the movable sealing plug 6, the medium can be pushed against the bottom wall of the pressing plate through the water passing strip 72, and the valve clack 3 can be lifted up. The medium rushing into the installation cavity 12 is divided by the water passing strip 72, so that the impact effect of the medium on the valve clack 3 can be reduced, when the valve clack 3 is opened, the water flow is divided by the water passing strip 72 and the gravity of the movable sealing plug 6 is retarded, so that the medium can be effectively prevented from causing larger impact on the inner wall of the valve body 1 after the valve clack 3 is rushed open, and the overall stability of the check valve body 1 is improved.

Further, a surface of the inside of the water blocking cover 7, which is close to the top water passing hole 71, is set to be an inclined surface, and when the movable sealing plug 6 is impacted upwards by a medium, the top of the movable sealing plug 6 is contacted with the inclined surface of the inside of the water blocking cover 7. Therefore, a clearance is reserved between the movable sealing plug 6 and the valve clack 3, so that the valve clack 3 can be normally opened and closed, and the medium flow rate of the check valve in the working process is improved.

Specifically, the movable sealing plug 6 may be made of alumina ceramic. The movable sealing plug 6 made of alumina ceramic has strong wear resistance and has a density larger than a large amount of medium, so that the movable sealing plug 6 can automatically subside to seal the water passing hole 71 at the bottom of the water blocking cover 7 when the medium stops flowing in the check valve. And the movable sealing plug 6 made of the alumina ceramic material has strong corrosion resistance, and the service life of the alumina ceramic material is prolonged.

Further, an installation step 121 which is matched with the size of the water-blocking cover 7 is formed on the inner bottom wall of the installation cavity 12 along the edge of the opening of the medium flow channel 11 passing through the inner bottom wall of the installation cavity 12, an installation sheet 73 is integrally and fixedly arranged above the water-blocking cover 7, the installation sheet 73 is fixedly connected with the valve body 1 through a bolt, and the sealing ring 5 is arranged on the top wall of the installation sheet 73. Through the detachable connection of the water blocking cover 7 and the valve body 1, when the water blocking cover 7 is damaged or the sealing ring 5 is damaged, an operator can open the valve cover 2 so as to detach and replace the water blocking cover 7, and the reusability of the check valve is greatly improved.

Further, a sealing ring 13 may be embedded in the inner bottom wall of the installation chamber 12, and when the water blocking cover 7 is installed in the valve body 1, the bottom wall of the installation piece 73 contacts with the sealing ring 13, so as to ensure the sealing effect of the installation gap between the water blocking cover 7 and the valve body 1.

In order to adjust the plugging pressure of the valve clack 3 to the medium flow channel 11, so that the medium flowing in the check valve can impact the valve clack 3 under proper pressure to be suitable for various working environments, in the embodiment of the utility model, a threaded hole is vertically formed in the valve cover 2 in a penetrating manner, a screw rod 8 is threaded in the threaded hole, one end of the screw rod 8 extending out of the valve cover 2 is coaxially and fixedly connected with a handle 81, the other end of the screw rod 8 extends into the mounting cavity 12 and is fixedly connected with a pressure plate 82, the elastic piece 4 is specifically a spring, one end of the spring is in butt joint with the valve clack 3, and the other end of the spring is in butt joint with the pressure plate 82. The operator can control the initial compression amount of the spring by rotating the handle 81 outside the check valve, thereby adjusting the pressure of the spring to the valve clack 3, and the operation is convenient.

The implementation principle of the lifting check valve provided by the embodiment of the utility model is as follows: when the valve clack 3 is tightly pressed on the medium flow channel 11 in the valve body 1, the sealing step 31 at the bottom of the valve clack 3 is in sealing contact with at least three layers of sealing rings 5 in the mounting cavity 12, and when impurities are mixed in a medium passing through the check valve and are pressed between the valve clack 3 and the valve body 1, the sealing rings 5 contacted with the impurities are pressed and deformed, and other sealing rings 5 still can continuously play a role in sealing the check valve, so that the sealing effect of the check valve is greatly improved.

It will be apparent to those skilled in the art that while preferred embodiments of the present utility model have been described, additional variations and modifications may be made to these embodiments once the basic inventive concepts are known to those skilled in the art. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The utility model provides a lifting check valve, includes valve body (1), valve gap (2), valve clack (3) and elastic component (4), be equipped with intercommunication valve body (1) both ends open-ended medium runner (11) in valve body (1), mounting chamber (12) of intercommunication medium runner (11) have been seted up downwards to the roof of valve body (1), valve gap (2) can dismantle the setting at valve body (1) top and are used for closing mounting chamber (12), valve clack (3) set up in mounting chamber (12) and through vertical elevating movement with switching medium runner (11), elastic component (4) set up in order to order about valve clack (3) downstream and close medium runner (11) between valve clack (3) and valve gap (2), its characterized in that: still include sealing washer (5), sealing washer (5) are equipped with many circles along the circumference coaxial of medium runner (11) and installation cavity (12) intercommunication opening part, sealing washer (5) are fixed to be set up in installation cavity (12), the outside coaxial extension of one end that valve clack (3) are located installation cavity (12) is provided with seal step (31), seal step (31) and sealing washer (5) sealing contact when valve clack (3) close medium runner (11).

2. The lifting check valve according to claim 1, further comprising an auxiliary sealing assembly, wherein the auxiliary sealing assembly comprises a movable sealing plug (6) and a water blocking cover (7), the water blocking cover (7) is hollow, the movable sealing plug (6) is movably arranged in the water blocking cover (7), the water blocking cover (7) vertically penetrates through to form a water passing hole (71), the water passing hole (71) at the bottom of the water blocking cover (7) can be sealed by the movable sealing plug (6), and a plurality of water passing strips (72) communicated with the inside of the water blocking cover (7) are arranged at intervals at the top of the water blocking cover (7) along the edge of the water passing hole (71).

3. A lifting check valve according to claim 2, characterized in that the surface of the inside of the water-blocking cover (7) close to the top water-passing hole (71) is provided with an inclined surface, and the top of the movable sealing plug (6) can be contacted with the inclined surface of the inside of the water-blocking cover (7).

4. A lifting check valve according to claim 2, characterized in that the movable sealing plug (6) is of aluminium oxide ceramic material.

5. The lifting check valve according to claim 2, wherein an installation step (121) which is matched with the water-blocking cover (7) in size is formed on the edge of an opening which passes through the inner bottom wall of the installation cavity (12) along the medium flow channel (11) on the inner bottom wall of the installation cavity (12), an installation sheet (73) is integrally and fixedly arranged above the water-blocking cover (7), the installation sheet (73) is fixedly connected with the valve body (1) through a bolt, and the sealing ring (5) is arranged on the top wall of the installation sheet (73).

6. The lifting check valve according to any one of claims 1 to 5, wherein a screw rod (8) is threaded on the valve cover (2), one end of the screw rod (8) is coaxially and fixedly connected with a handle (81), the other end of the screw rod extends into the mounting chamber (12) and is fixedly connected with a pressure plate (82), and one end of the elastic piece (4) is abutted with the valve clack (3), and the other end of the elastic piece is abutted with the pressure plate (82).