CN221221469U - Lifting check valve - Google Patents

Abstract

The utility model discloses a lifting check valve, which comprises a valve body with a check channel, a valve seat, a valve cover and a valve rod, wherein the valve seat, the valve cover and the valve body are arranged in the check channel, the valve cover is fixed with the valve body through bolts, the valve rod is matched with the valve cover, a compression spring is arranged between the valve rod and the valve cover, a plugging block is arranged at the bottom of the valve rod and is used for carrying out first-layer plugging on the lower port of the valve seat, a reinforcing sealing piece is arranged in the plugging block, when the plugging block plugs the bottom end of the valve seat, the reinforcing sealing piece and the upper port of the valve seat form second-layer plugging, the check valve can realize double plugging through the arrangement of the plugging block and the reinforcing sealing piece, the sealing effect is improved, and the check valve does not need manual adjustment.

Description

Lifting check valve

Technical Field

The present utility model relates to a lifting check valve.

Background

The check valve is a valve with a circular valve clack and can stop the medium from flowing backwards by means of self weight and medium pressure, the check valve is divided into a lifting check valve and a swing check valve, the lifting check valve is characterized in that the medium flows from the lower side of an inlet section and flows out from an outlet end, when the inlet pressure is greater than the sum of the weight of the valve clack and the flowing resistance of the valve clack, for example, the valve is opened, the valve is driven to rotate by a valve rod by a rotating turntable, so that the threaded rod moves, the threaded rod in a moving state is matched with a first vertical rod and a second vertical rod, the valve clack is driven to move, the sealing performance of the valve body is improved under the limit of the threaded rod, and water leakage is prevented; the valve body drives the valve rod to rotate through the rotating turntable, and the valve rod is matched with the threaded rod to adjust and move the position of the valve clack, so that the flexibility of the valve clack is reduced, the turntable is required to be manually adjusted when the door is opened or closed every time, the sealing effect can be achieved, the valve body is inconvenient to use, and the valve clack is also protected from being damaged due to water impact.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model aims to provide a lifting check valve, which can realize double plugging through the arrangement of a plugging block and a reinforcing sealing piece, improves the sealing effect and does not need manual adjustment.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a lifting check valve, includes disk seat, valve gap and the valve rod that valve body, check channel that has the check channel were equipped with, the valve gap passes through the bolt and is fixed with the valve body, valve rod and valve gap cooperation and between are equipped with compression spring, the valve rod bottom is equipped with the shutoff piece, the shutoff piece is used for carrying out the first layer shutoff to the disk seat lower port, be equipped with the enhancement sealing member in the shutoff piece, when shutoff piece shutoff disk seat bottom, the enhancement sealing member forms the second floor shutoff with the disk seat upper port.

Further, a concave cavity is formed in the valve cover, a vertical sliding groove is formed in the concave cavity, the vertical sliding groove is used for sliding connection of the valve rod, the upper end of the compression spring is fixed to the upper end of the concave cavity, and vertical through holes are formed in the valve cover and the valve rod corresponding to the inner portion of the cavity.

Further, the shutoff piece comprises round platform below the higher authority cylinder, the cylinder is inside to be equipped with first cavity, and the outer terminal surface is equipped with the ring channel, strengthen sealing member distribution in cavity and ring channel, it includes O type gasbag, fills the air cavity, bulldozes the piece to strengthen sealing member, O type gasbag sets up in the ring channel and O type gasbag part and the inside fixed connection of ring channel, O type gasbag passes through pipeline and fills the air cavity intercommunication and aerifys the cavity and wear to establish in vertical through-hole, bulldozes the piece setting and is in the air cavity upper end that fills, bulldozes the gas in the air cavity and carries to O type gasbag through bulldozing the piece, makes O type gasbag transversely expand towards the one end of disk seat.

Further, the pushing piece is a hydraulic push rod, the end part of the hydraulic push rod is connected with a sealing piston, when the spring is unfolded, the hydraulic push rod is pressed down to extrude the inflating cavity, and when the spring is contracted, the hydraulic push rod is pulled up to pump gas in the O-shaped air bag back into the inflating cavity.

Further, the inflation cavity is provided with an inflation inlet.

Further, the inside second cavity that is equipped with of round platform, upper end is connected with a plurality of buffer springs and buffer spring one end and cavity up end fixed connection down in the second cavity, be equipped with first fly leaf in the second cavity, first fly leaf wears out round platform bottom through the connecting rod and is connected with the retaining plate, the terminal surface is the arc under the retaining plate.

The utility model has the beneficial effects that: the sealing block is in contact with the valve seat in long-term use, so that abrasion is easy to occur, gaps are generated to enable the sealing performance of the check valve to be poor, and the reinforcing sealing piece is arranged, so that the sealing block can play a role in secondary sealing when the sealing of the sealing block is poor, and has a double sealing effect with the sealing block, so that the sealing performance of the check valve is greatly improved; when the medium flows to impact the bottom end of the plugging block, the medium is contacted with the resisting plate first, and the medium is enabled to rise to drive the buffer spring to compress, so that the elastic force of the protection spring can be utilized, impact force generated by the medium flowing can be reduced to impact and wear the bottom end of the plugging block, the abrasion and damage of the plugging block caused by overlarge medium impact are avoided, the corresponding maintenance cost is reduced, and the service life of the plugging block is prolonged.

Drawings

FIG. 1 is a schematic view showing a state in which a check valve is closed;

FIG. 2 is a schematic diagram showing a state in which the check valve is opened;

Fig. 3 is an enlarged partial schematic view of the portion a in fig. 2.

Reference numerals: 1. a valve body; 2. a check passage; 3. a valve seat; 4. a valve cover; 41. a cavity; 5. a valve stem; 6. a block; 7. a compression spring; 8. reinforcing the seal; 81. an O-shaped air bag; 82. an air-filling cavity; 83. a pushing member; 831. a hydraulic push rod; 832. a sealing piston; 9. a vertical through hole; 10. a first cavity; 11. an annular groove; 12. a second cavity; 13. a buffer spring; 14. a first movable plate; 15. and the baffle is abutted.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-3, the utility model provides a lifting check valve, which comprises a valve body 1 with a check channel 2, a valve seat 3, a valve cover 4 and a valve rod 5, wherein the valve seat 3, the valve cover 4 and the valve rod 5 are arranged in the check channel 2, the valve cover 4 is fixed with the valve body 1 through bolts, the valve rod 5 is matched with the valve cover 4, a compression spring 7 is arranged between the valve rod 5 and the valve cover 4, a sealing block 6 is arranged at the bottom of the valve rod 5, the sealing block 6 is used for sealing the lower port of the valve seat 3 in a first layer, a reinforcing sealing element 8 is arranged in the sealing block 6, when the sealing block 6 seals the bottom end of the valve seat 3, the reinforcing sealing element 8 and the upper port of the valve seat 3 form a second layer of sealing, a concave cavity 41 is arranged on the valve cover 4, a vertical sliding groove is arranged on the inner wall of the concave cavity 41 for sliding connection of the valve rod 5, and the vertical sliding groove corresponding to the vertical sliding groove of the valve rod 5 is provided with a sliding block to ensure that the valve rod 5 moves up and down in a vertical direction; the upper end of the compression spring 7 is fixed with the upper end of the cavity;

referring to fig. 3, the plugging block 6 is formed by a round table below an upper cylinder, a first cavity 10 is arranged in the cylinder, an annular groove 11 is arranged on the outer end face of the cylinder, a reinforcing sealing piece 8 is distributed in the cavity and the annular groove 11, the reinforcing sealing piece 8 comprises an O-shaped air bag 81, an inflation cavity 82 and a pushing piece 83, the O-shaped air bag 81 is arranged in the annular groove 11, part of the O-shaped air bag 81 is fixedly connected with the inside of the annular groove 11, the O-shaped air bag is communicated with the inflation cavity 82 through a pipeline, the inflation cavity 82 penetrates through a vertical through hole 9, gas is filled in the inflation cavity 82 through an inflation port, the pushing piece 83 is arranged at the upper end of the inflation cavity 82, the pushing piece 83 is a hydraulic push rod 831, the end part of the hydraulic push rod 831 is connected with a sealing piston 832, the sealing performance is guaranteed, the air leakage of the inflation cavity 82 is avoided, when the spring is unfolded, the hydraulic push rod 831 is pressed down to squeeze the inflation cavity 82, the O-shaped air bag 81 is transversely expanded to be in sealing fit with the valve seat 3, a secondary sealing effect is formed, and the sealing block 6 is formed by the lowering the sealing performance for a long time; when the spring is contracted, the hydraulic ram 831 is pulled up to pump the gas in the O-shaped air bag 81 back to the gas filling chamber 82, so that the plugging block 6 is conveniently disconnected from the valve seat 3, and the flow of the liquid medium is not affected.

Referring to fig. 3, a second cavity 12 is provided in the circular truncated cone, the upper end in the second cavity 12 is downward connected with a plurality of buffer springs 13, one end of each buffer spring 13 is fixedly connected with the upper end surface of the cavity, a first movable plate 14 is provided in the second cavity 12, the first movable plate 14 penetrates out of the bottom of the circular truncated cone through a connecting rod and is connected with a resisting plate 15, the lower end surface of the resisting plate 15 is arc-shaped, when the medium flows to impact the bottom end of the plugging block 6, the medium contacts with the resisting plate 15 first, and makes the medium rise to drive the buffer springs 13 to compress, and then the elasticity of the protection springs can be utilized, so that impact force generated by the medium flow can be reduced to impact and wear the bottom end of the plugging block 6, abrasion and damage of the plugging block 6 caused by excessive medium impact can be avoided, corresponding maintenance cost can be reduced, and the service life of the plugging block 6 can be prolonged.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (6)

1. The utility model provides a lifting check valve, includes valve body (1) that has check passageway (2), check passageway (2) are equipped with disk seat (3), valve gap (4) and valve rod (5), valve gap (4) are fixed with valve body (1) through the bolt, valve rod (5) and valve gap (4) cooperation and be equipped with compression spring (7), its characterized in that between: the valve rod (5) bottom is equipped with shutoff piece (6), shutoff piece (6) are used for carrying out the first layer shutoff to disk seat (3) lower port, be equipped with in shutoff piece (6) and strengthen sealing member (8), when shutoff piece (6) shutoff disk seat (3) bottom, strengthen sealing member (8) and disk seat (3) upper port and form the second floor shutoff.

2. The lifting check valve of claim 1, wherein: be equipped with cavity (41) on valve gap (4), cavity (41) inside is equipped with vertical spout, vertical spout supplies valve rod (5) to slide and connects, compression spring (7) upper end is fixed with cavity (41) upper end, valve gap (4) and valve rod (5) correspond cavity inside and all are equipped with vertical through-hole (9).

3. The lifting check valve of claim 2, wherein: the sealing block (6) is composed of a circular table below an upper cylinder, a first cavity (10) is formed in the cylinder, an annular groove (11) is formed in the outer end face of the cylinder, reinforcing sealing pieces (8) are distributed in the cavity and the annular groove (11), the reinforcing sealing pieces (8) comprise O-shaped air bags (81), an inflation cavity (82) and pushing pieces (83), the O-shaped air bags (81) are arranged in the annular groove (11) and are fixedly connected with the inner portion of the annular groove (11), the O-shaped air bags are communicated with the inflation cavity (82) through pipelines, the inflation cavity (82) is arranged in a penetrating mode in a vertical through hole (9), the pushing pieces (83) are arranged at the upper end of the inflation cavity (82), and gas in the inflation cavity (82) is pushed by the pushing pieces (83) to be conveyed to the O-shaped air bags (81), so that the O-shaped air bags (81) transversely expand towards one end of a valve seat (3).

4. A lifting check valve according to claim 3, wherein: the pushing and pressing piece (83) is a hydraulic push rod (831), the end part of the hydraulic push rod (831) is connected with a sealing piston (832), when the compression spring (7) is unfolded, the hydraulic push rod (831) is pressed down to press the inflating cavity (82), and when the compression spring (7) is contracted, the hydraulic push rod (831) is pulled up to pump gas in the O-shaped air bag (81) back into the inflating cavity (82).

5. The lifting check valve of claim 4, wherein: the inflation cavity (82) is provided with an inflation inlet.

6. The lifting check valve of claim 5, wherein: the novel round table is characterized in that a second cavity (12) is formed in the round table, a plurality of buffer springs (13) are downwards connected to the upper end of the second cavity (12), one end of each buffer spring (13) is fixedly connected with the upper end face of the cavity, a first movable plate (14) is arranged in the second cavity (12), the first movable plate (14) penetrates out of the bottom of the round table through a connecting rod to be connected with a resisting plate (15), and the lower end face of the resisting plate (15) is arc-shaped.