CN219809463U

CN219809463U - Pressure reducing regulating valve

Info

Publication number: CN219809463U
Application number: CN202320925250.0U
Authority: CN
Inventors: 金伟国; 杜勇平; 杜金鹏; 郑棚; 徐水芬
Original assignee: Junkang Fluid Technology Co ltd
Current assignee: Junkang Fluid Technology Co ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-10-10
Anticipated expiration: 2033-04-18

Abstract

The utility model discloses a pressure reducing regulating valve, which comprises a valve seat, a valve rod and a valve core, wherein the valve seat is provided with an inflow channel and an outflow channel, the valve core is positioned in the outflow channel, the valve rod is detachably connected with the valve core, a fixed seat and a sealing sleeve are arranged on the valve seat, the sealing sleeve is fixed between the valve seat and the fixed seat, a movable cavity is formed between the sealing sleeve and the fixed seat, a diaphragm is arranged in the movable cavity, the edge of the diaphragm is fixed between the sealing sleeve and the fixed seat, one end of the valve rod is fixed in the middle part of the diaphragm, and the diaphragm separates the movable cavity into a backflow cavity and an installation cavity.

Description

Pressure reducing regulating valve

Technical Field

The utility model discloses a pressure reducing regulating valve, and belongs to the technical field of valves.

Background

The pressure reducing valve is used as a pressure regulating device and is widely applied to pipeline systems of various fluids. When the system is in operation, the upstream high pressure fluid passes through the pressure relief valve, the fluid pressure drops to the point where the downstream load is required, and the pressure at the outlet is maintained constant.

When the existing pressure reducing valve is in actual use, when the fluid pressure at the inflow end of the valve is in a larger state, the backflow feedback system at the outflow end is relied on to reduce the fluid flow at the outflow end, although the pressure reducing and stabilizing effects can be realized, when the pressure at the inflow end exceeds the safety pressure of the valve, a larger potential safety hazard exists, meanwhile, partial residues still exist in the fluid in the backflow system of the pressure reducing valve after the work is finished, the fluid cannot be completely discharged, and certain influence is brought to the storage of the pressure reducing valve.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a pressure reducing regulating valve.

The utility model realizes the purpose through the following technical scheme that the pressure reducing regulating valve comprises a valve seat, a valve rod and a valve core, wherein the valve seat is provided with an inflow channel and an outflow channel, the valve core is positioned in the outflow channel, the valve rod is detachably connected with the valve core, a fixed seat and a sealing sleeve are arranged on the valve seat, the sealing sleeve is fixed between the valve seat and the fixed seat, a movable cavity is formed between the sealing sleeve and the fixed seat, a diaphragm is arranged in the movable cavity, the edge of the diaphragm is fixed between the sealing sleeve and the fixed seat, one end of the valve rod is fixed in the middle of the diaphragm, the diaphragm separates the movable cavity into a backflow cavity and a mounting cavity, a regulating piece is arranged in the mounting cavity, a diversion hole is formed in the inner side of the valve rod, one end of the diversion hole close to the backflow cavity is in an L-shaped structure, a first sealing rubber ring matched with the sealing sleeve is arranged on the outer side of the valve rod, a second sealing rubber ring is arranged on one side of the sealing sleeve, a positioning table capable of applying pressure to the second sealing rubber ring is arranged on the valve seat and the valve seat.

Preferably, the flowing back piece includes activity end cap, stop bolt, eccentric cylinder and dwang, be provided with the flowing back hole on the seal cover, activity end cap one end is with flowing back hole complex frustum structure, the diameter of the other end is less than the diameter of flowing back hole, the one end level of dwang pass the disk seat and with eccentric cylinder fixed connection, be provided with on the disk seat and apply the pretension spring of the effort of keeping away from the valve rod to the dwang, stop bolt's one end and activity end cap connection, the other end is contradicted with eccentric cylinder's outer wall, be provided with reset spring between seal cover and the stop bolt.

Preferably, the valve core comprises a valve plate and a fastener, the section of the valve plate is of a concave structure, a third sealing rubber ring is arranged on the valve plate, the fastener is in threaded connection with the valve rod, and a through hole communicated with the diversion hole is formed in the fastener.

Preferably, the valve rod is provided with a flow guiding table, and the diameter of the flow guiding table gradually increases towards the direction close to the third sealing rubber ring.

Preferably, a bottom cover is arranged on one side of the valve seat, which is positioned on the outflow channel, and a fourth sealing rubber ring is arranged between the bottom cover and the valve seat.

Preferably, the adjusting piece comprises a pressure-bearing spring, a pressure seat and an adjusting bolt, wherein the pressure-bearing spring and the pressure seat are arranged in the mounting cavity, two ends of the pressure-bearing spring are respectively abutted against the pressure seat and the diaphragm, the adjusting bolt is in threaded connection with the fixing seat, and one end of the adjusting bolt is abutted against the pressure seat.

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

1. through set up locating bench and second seal rubber ring respectively on valve rod and seal cover, rely on changing the elasticity of pressure-bearing spring for the locating bench is contradicted to second seal rubber ring, and the water conservancy diversion hole is sealed by second seal rubber ring, and fluid in the outflow passageway can't get into the backward flow chamber, so can keep the case in the state of full logical, in order to control the fluid pressure of inflow end and not surpass safe pressure, ensure the security of valve work.

2. Through setting up flowing back spare between seal cover and disk seat, when rotatory dwang for stop bolt drives the upward movement of movable end cap, so that the fluid in the backward flow chamber can enter into inflow channel from the flowing back hole, thereby effectually avoid remaining the fluid in the backward flow chamber to cause the influence to the storage of valve.

Drawings

FIG. 1 is a schematic diagram of a pressure reducing regulating valve according to the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial enlarged view at B in FIG. 1;

reference numerals: 1. a valve seat; 2. an inflow channel; 3. a valve stem; 4. sealing sleeve; 5. a membrane; 6. an adjusting member; 7. a pressure seat; 8. an adjusting bolt; 9. a fixing seat; 10. a pressure-bearing spring; 11. a mounting cavity; 12. an outflow channel; 13. a valve core; 14. a bottom cover; 15. a fastener; 16. a valve plate; 17. a diversion table; 18. a deflector aperture; 19. a first sealing rubber ring; 20. a through hole; 21. a third sealing rubber ring; 22. a positioning table; 23. a movable plug; 24. a liquid discharge hole; 25. a return spring; 26. a rotating lever; 27. an eccentric cylinder; 28. a limit bolt; 29. a liquid discharge member; 30. the second sealing rubber ring; 31. and a reflow chamber.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-3, a pressure reducing regulating valve comprises a valve seat 1, a valve rod 3 and a valve core 13, wherein the valve seat 1 is provided with an inflow channel 2 and an outflow channel 12, the valve core 13 is positioned in the outflow channel 12, the valve rod 3 is detachably connected with the valve core 13, a fixed seat 9 and a sealing sleeve 4 are arranged on the valve seat 1, the sealing sleeve 4 is fixed between the valve seat 1 and the fixed seat 9, a movable cavity is formed between the sealing sleeve 4 and the fixed seat 9, a diaphragm 5 is arranged in the movable cavity, the edge of the diaphragm 5 is fixed between the sealing sleeve 4 and the fixed seat 9, one end of the valve rod 3 is fixed in the middle of the diaphragm 5, the diaphragm 5 separates the movable cavity into a backflow cavity 31 and a mounting cavity 11, an adjusting piece 6 is arranged in the mounting cavity 11, a diversion hole 18 is arranged on the inner side of the valve rod 3, one end of the diversion hole 18 close to the backflow cavity 31 is in an L-shaped structure, a first sealing rubber ring 19 matched with the sealing sleeve 4 is arranged on the outer side of the valve rod 3, a second sealing rubber ring 30 is arranged on one side of the sealing sleeve 4, a positioning table 22 capable of applying pressure to the second sealing rubber ring 30 is arranged between the sealing sleeve 4 and the valve seat 1 and a liquid discharging piece 29 is arranged.

The drain 29 comprises a movable plug 23, a limit bolt 28, an eccentric cylinder 27 and a rotating rod 26, wherein a drain hole 24 is formed in the sealing sleeve 4, one end of the movable plug 23 is of a frustum structure matched with the drain hole 24, the diameter of the other end of the movable plug is smaller than that of the drain hole 24, one end of the rotating rod 26 horizontally penetrates through the valve seat 1 and is fixedly connected with the eccentric cylinder 27, a pre-tightening spring which applies acting force to the rotating rod 26 far away from the valve rod 3 is arranged on the valve seat 1, one end of the limit bolt 28 is connected with the movable plug 23, the other end of the limit bolt abuts against the outer wall of the eccentric cylinder 27, a reset spring 25 is arranged between the sealing sleeve 4 and the limit bolt 28, when the adjusting valve is detached from a pipeline or after the adjusting valve is completed, the abutting position of the limit bolt 28 and the eccentric cylinder 27 is changed, the drain hole 24 is not blocked by rotating the rotating rod 26, fluid can smoothly flow into the inflow channel 2 from the backflow cavity 31, and then the rotating rod 26 is continuously, the movable plug 23 again blocks the drain hole 24 under the action of the reset spring 25, so that fluid cannot remain in the backflow cavity 31, and therefore the valve is not affected, and the valve rod 23 can be moved to the position to the lowest position when the valve rod 23 is kept under the pressure, and can bear the pressure, and the valve rod 23.

The valve core 13 includes valve plate 16 and fastener 15, the cross-section of valve plate 16 is concave structure, and be provided with third seal rubber ring 21 on the valve plate 16, fastener 15 and valve rod 3 threaded connection, and be provided with the through-hole 20 with water conservancy diversion hole 18 intercommunication on the fastener 15, valve plate 16 passes through fastener 15 to be fixed on valve rod 3, when valve rod 3 drove valve plate 16 and block inflow passageway 2 and outflow passageway 12, third seal rubber ring 21 can produce deformation under the pressure effect of valve plate 16 for have better leakproofness between valve plate 16 and the disk seat 1, have water conservancy diversion platform 17 on the valve rod 3, the diameter of water conservancy diversion platform 17 is towards the direction that is close to third seal rubber ring 21 grow gradually, when fluid flows along water conservancy diversion platform 17, the fluid can outwards present the trend of diffusion, so can reduce the impact force to third seal rubber ring 21, thereby prolong the life of third seal rubber ring 21.

The valve seat 1 is provided with the bottom 14 in one side of outflow passageway 12, be provided with the fourth sealing rubber circle between bottom 14 and the valve seat 1, through dismantling bottom 14, can clear up the impurity in the outflow passageway 12, the leakproofness between bottom 14 and the valve seat 1 can be guaranteed to the fourth sealing rubber circle, regulating part 6 includes pressure-bearing spring 10, pressure seat 7 and adjusting bolt 8, pressure-bearing spring 10 and pressure seat 7 are located installation cavity 11, and pressure-bearing spring 10's both ends are contradicted with pressure seat 7 and diaphragm 5 respectively, adjusting bolt 8 and fixing base 9 threaded connection, and one end is contradicted with pressure seat 7, through rotating adjusting bolt 8, make the position of pressure seat 7 in installation cavity 11 change, thereby adjust pressure-bearing spring 10's elasticity, so that the position of valve rod 3 and diaphragm 5 junction changes in the movable chamber, the flow of fluid under the normal condition between pressure-bearing spring 13 and the valve seat 1 can be indirectly adjusted, the effect of adjusting the fluid pressure size of outflow passageway 12 has also been reached simultaneously.

Working principle: by controlling the elasticity of the pressure-bearing spring 10, the diaphragm 5 is in a small deformation state, the guide hole 18 is communicated with the backflow cavity 31 and the outflow channel 12, fluid in the inflow channel 2 enters the backflow cavity 31 along the guide hole 18 after entering the outflow channel 12, when the fluid pressure in the outflow channel 12 is increased, the fluid pressure in the backflow cavity 31 is also increased, the diaphragm 5 is pushed to move upwards to compress the pressure-bearing spring 10, so that the fluid flow in the outflow channel 12 is reduced, the pressure-reducing and pressure-stabilizing effects are achieved, when the pressure in the inflow channel 2 is increased to approach the safe pressure, the elasticity of the pressure-bearing spring 10 is increased by rotating the adjusting bolt 8, the diaphragm 5 and the valve rod 3 are pushed to move downwards, the positioning table 22 is abutted against the second sealing rubber ring 30, the guide hole 18 and the backflow cavity 31 are in a blocking state, and the inflow channel 2 and the outflow channel 12 are in an all-through state, the valve is in a safe pressure range, the deformation quantity of the diaphragm 5 can be controlled by the positioning table 22, damage caused by overlarge deformation of the diaphragm 5 is avoided, in addition, the whole fluid in the backflow cavity 31 can be discharged by the valve can be guaranteed, and the whole fluid can be prevented from being discharged by the residual fluid in the backflow cavity 31.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a pressure reducing regulating valve, includes disk seat (1), valve rod (3) and case (13), its characterized in that, disk seat (1) has an inflow passageway (2) and outflow passageway (12), case (13) are located outflow passageway (12), valve rod (3) are connected with case (13) can be dismantled, be provided with fixing base (9) and seal cover (4) on disk seat (1), seal cover (4) are fixed between disk seat (1) and fixing base (9), be formed with the movable chamber between seal cover (4) and fixing base (9), the movable intracavity is provided with diaphragm (5), the edge of diaphragm (5) is fixed between seal cover (4) and fixing base (9), the middle part at diaphragm (5) is fixed to the one end of valve rod (3), diaphragm (5) separate the movable chamber and are reflux chamber (31) and installation chamber (11), be provided with regulating part (6) in installation chamber (11), the inboard of valve rod (3) is provided with guide ring (18), guide ring (18) are close to the outside of valve rod (3) and are sealed with seal cover (19) in shape structure, the sealing sleeve (4) is provided with a second sealing rubber ring (30) on one side of the backflow cavity (31), a positioning table (22) capable of applying pressure to the second sealing rubber ring (30) is arranged on the valve rod (3), and a liquid discharging part (29) is arranged between the sealing sleeve (4) and the valve seat (1).

2. The pressure reducing regulating valve according to claim 1, wherein the liquid draining member (29) comprises a movable plug (23), a limit bolt (28), an eccentric cylinder (27) and a rotating rod (26), the sealing sleeve (4) is provided with a liquid draining hole (24), one end of the movable plug (23) is of a frustum structure matched with the liquid draining hole (24), the diameter of the other end of the movable plug is smaller than that of the liquid draining hole (24), one end of the rotating rod (26) horizontally penetrates through the valve seat (1) and is fixedly connected with the eccentric cylinder (27), a pre-tightening spring for applying a force far away from the valve rod (3) to the rotating rod (26) is arranged on the valve seat (1), one end of the limit bolt (28) is connected with the movable plug (23), the other end of the limit bolt is in collision with the outer wall of the eccentric cylinder (27), and a reset spring (25) is arranged between the sealing sleeve (4) and the limit bolt (28).

3. The pressure reducing regulating valve according to claim 1, wherein the valve core (13) comprises a valve plate (16) and a fastener (15), the cross section of the valve plate (16) is of a concave structure, a third sealing rubber ring (21) is arranged on the valve plate (16), the fastener (15) is in threaded connection with the valve rod (3), and a through hole (20) communicated with the diversion hole (18) is formed in the fastener (15).

4. A pressure reducing regulating valve according to claim 3, characterized in that the valve rod (3) is provided with a flow guiding table (17), and the diameter of the flow guiding table (17) gradually increases towards the direction approaching the third sealing rubber ring (21).

5. The pressure reducing regulating valve according to claim 1, wherein a bottom cover (14) is arranged on one side of the valve seat (1) located on the outflow channel (12), and a fourth sealing rubber ring is arranged between the bottom cover (14) and the valve seat (1).

6. The pressure reducing regulating valve according to claim 1, wherein the regulating member (6) comprises a pressure-bearing spring (10), a pressure seat (7) and a regulating bolt (8), the pressure-bearing spring (10) and the pressure seat (7) are located in the mounting cavity (11), two ends of the pressure-bearing spring (10) are respectively abutted against the pressure seat (7) and the diaphragm (5), the regulating bolt (8) is in threaded connection with the fixing seat (9), and one end of the regulating bolt is abutted against the pressure seat (7).