CN115727143A

CN115727143A - High-temperature high-pressure self-sealing gate valve

Info

Publication number: CN115727143A
Application number: CN202211561165.7A
Authority: CN
Inventors: 夏崇茅; 王汉光; 王学丰; 王博文; 王云鹏
Original assignee: Weidouli Valves Manufacturing Co ltd
Current assignee: Weidouli Valves Manufacturing Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-03-03

Abstract

The invention discloses a high-temperature high-pressure self-sealing gate valve, which comprises a valve seat, a valve core and a valve rod, wherein the valve seat is provided with a channel, the middle part of the valve seat is provided with an installation cavity, the top of the installation cavity is provided with a cover plate, the cover plate is provided with an installation seat, one end of the valve rod penetrates through the installation seat and the cover plate to be fixedly connected with the valve core, the other end of the valve rod is provided with a hand wheel, two sides of the valve seat corresponding to the installation cavity are provided with sealing rings, two sides of the valve core are provided with inclined planes matched with the sealing rings, and the valve core is also provided with a pressing plate.

Description

High-temperature high-pressure self-sealing gate valve

Technical Field

The invention discloses a high-temperature high-pressure self-sealing gate valve, and belongs to the technical field of valves.

Background

The gate valve is generally opened and closed movably in the direction perpendicular to the fluid moving direction through a gate plate, so that the full opening and the full closing of the valve are controlled, the gate valve is widely applied to the fields of water conservancy, oil and gas pipelines and the like, the opening and the closing of a connecting pipeline are controlled conveniently and flexibly, and the existing gate valve is generally used for driving a valve rod to transmit through a hand wheel outside a valve body, lifting or putting down the gate plate, so that the effect of opening or closing the pipeline is achieved.

The flashboard of current gate valve is usually two kinds, and the branch maybe planar structure and inclined plane structure, relies on the side cooperation realization of gate valve and disk seat to seal, but these flashboards of two kinds of forms all have wearing and tearing when sealed, lead to the flashboard to use and need change after a period of time, especially in highly compressed environment, higher to the requirement of leakproofness, conventional gate valve can't satisfy the operation requirement.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide a high-temperature high-pressure self-sealing gate valve.

The high-temperature high-pressure self-sealing gate valve comprises a valve seat, a valve core and a valve rod, wherein the valve seat is provided with a channel, the middle part of the valve seat is provided with an installation cavity, the top of the installation cavity is provided with a cover plate, the cover plate is provided with an installation seat, one end of the valve rod penetrates through the installation seat and the cover plate to be fixedly connected with the valve core, the other end of the valve rod is provided with a hand wheel, the valve seat is provided with sealing rings corresponding to two sides of the installation cavity, two sides of the valve core are provided with inclined planes matched with the sealing rings, a pressing plate is further arranged on the valve core, a power part for driving the pressing plate to slide along the direction of the vertical inclined planes and to abut against the sealing rings is arranged on the inner side of the valve core, a slag discharge port is arranged at the bottom of the installation cavity, a sealing plate for covering the slag discharge port is arranged in the installation cavity, and an elastic device for enabling the sealing plate to abut against the bottom of the installation cavity is arranged on the outer side of the valve seat.

Preferably, the power part comprises a driving rod, a sliding seat, a push rod and a first spring, the sliding seat is slidably mounted in the valve core, two sides of the sliding seat are provided with wedging surfaces, the push rod is of a stepped shaft structure, one end with a small diameter is fixedly connected with the pressing plate through a bolt, one end with a large diameter is abutted to the wedging surfaces, a first mounting hole is formed in the valve core, the first spring is sleeved on the push rod, two ends of the first spring are abutted to the side walls of the push rod and the first mounting hole respectively, the driving rod is located at the center of the valve rod, one end of the driving rod is connected with the valve rod through a bolt, and the other end of the driving rod is abutted to the sliding seat.

Preferably, two push rods are connected to the same pressure plate, the inclined angle of the inclined plane is 15-30 degrees, and a knob groove is formed in the end portion of the drive rod.

Preferably, two second springs are arranged at the bottom of the sliding seat, and a second mounting hole for mounting the second springs is formed in the valve core.

Preferably, the valve core comprises a core seat and a core cover which are connected through a bolt, and the power part is arranged on the core seat.

Preferably, the sealing plate is of an arc-shaped structure, the elastic device comprises a mounting plate, four connecting rods and a third spring, the four connecting rods are symmetrically arranged, two ends of the four connecting rods are respectively in threaded connection with the mounting plate and the sealing plate, and the connecting rods are sleeved with the connecting rods and located on the outer side of the valve seat.

Preferably, two check blocks are arranged on one side, close to the valve seat, of the mounting plate, and a flow guide protrusion is arranged in the middle of each check block.

Preferably, a movable clamping device is arranged between the valve core and the sealing plate and comprises an inserting column, a positioning clamp protrusion and a fourth spring, the inserting column is of a round platform structure and is located on the sealing plate, a positioning hole matched with the inserting column is formed in the valve core, an annular groove is formed in the inserting column, the positioning clamp protrusion and the fourth spring are both provided with two positioning clamp protrusions, the two positioning clamp protrusions and the two fourth spring are horizontally arranged on two sides of the positioning hole, and an end cap is arranged on the outer side of the fourth spring.

Preferably, the sealing sleeve is provided with a rib for limiting the rotation of the sealing sleeve, and the valve seat is provided with a groove matched with the rib.

Compared with the prior art, the invention has the beneficial effects that:

1. through setting up clamp plate and power spare, utilize the actuating lever to promote the sliding seat and slide down to force the push rod to promote the clamp plate and slide and contradict with the sealing washer along the direction on perpendicular inclined plane, thereby close the gate valve, because the effort of fluid to the clamp plate is not perpendicular with the push rod, so weakened the effort to the push rod, can be applicable to in the highly compressed environment, the wearing and tearing of clamp plate and sealing washer are little moreover, have prolonged the life of gate valve.

2. Set up the slag notch through the bottom at the installation cavity, can realize sealing by the closing plate when normal condition, when needs are clear to the gate valve, only need upwards promote the mounting panel, thereby open the slag notch, avoid impurity to pile up in the installation cavity, dog and water conservancy diversion arch can be with fluid to both sides water conservancy diversion, avoid spattering operator's on one's body, and when the case moves down and touch the post of inserting, can keep the chucking, when case rebound, also stimulate the closing plate rebound, the slag notch is opened and self-closing in the short time, also can reach the effect of clearance.

Drawings

FIG. 1 is a schematic structural view of a high-temperature high-pressure self-sealing gate valve according to the present invention;

FIG. 2 is a cross-sectional view of a high temperature and high pressure self-sealing gate valve of the present invention;

FIG. 3 is an exploded view of the pressure plate, power element and valve cartridge of the present invention;

FIG. 4 is a schematic structural view of a core print of the present invention;

FIG. 5 is a schematic view of the elastic device according to the present invention;

reference numerals are as follows: 1. a channel; 2. a cover plate; 3. a hand wheel; 4. a drive rod; 5. a knob slot; 6. a valve stem; 7. a mounting seat; 8. a valve seat; 9. an elastic device; 10. a seal ring; 11. a power member; 12. a mounting cavity; 13. a valve core; 14. a movable clamping device; 15. a rib; 16. a third spring; 17. a slag discharge port; 18. mounting a plate; 19. a sealing plate; 20. a core cover; 21. a sliding seat; 22. pressing a plate; 23. a first spring; 24. a fourth spring; 25. a core print; 26. positioning the clamping protrusion; 27. a plug; 28. a second spring; 29. a push rod; 30. a wedging surface; 31. a first mounting hole; 32. a bevel; 33. a second mounting hole; 34. an annular groove; 35. inserting a column; 36. a connecting rod; 37. a stopper; 38. and (4) flow guide bulges.

Detailed Description

The technical solutions in the embodiments of the present invention will be 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-5, a high-temperature high-pressure self-sealing gate valve includes a valve seat 8, a valve core 13 and a valve rod 6, the valve seat 8 is provided with a channel 1, and the middle portion of the valve seat is provided with an installation cavity 12, the top of the installation cavity 12 is provided with a cover plate 2, the cover plate 2 is provided with an installation seat 7, one end of the valve rod 6 passes through the installation seat 7 and the cover plate 2 to be fixedly connected with the valve core 13, the other end of the valve rod is provided with a hand wheel 3, the valve seat 8 is provided with sealing rings 10 corresponding to two sides of the installation cavity 12, two sides of the valve core 13 are provided with inclined planes 32 matched with the sealing rings 10, the valve core 13 is further provided with a pressure plate 22, the inner side of the valve core 13 is provided with a power part 11 driving the pressure plate 22 to slide along the direction of the vertical inclined planes 32 and abut against the sealing rings 10, the bottom of the installation cavity 12 is provided with a slag discharge port 17, and a sealing plate 19 covering the slag discharge port 17 is provided in the installation cavity 12, and the outer side of the valve seat 8 is provided with an elastic device 9 making the sealing plate 19 abut against the bottom of the installation cavity 12.

The power part 11 comprises a driving rod 4, a sliding seat 21, a push rod 29 and a first spring 23, the sliding seat 21 is slidably mounted in a valve core 13, two sides of the sliding seat are provided with wedging surfaces 30, the push rod 29 is of a stepped shaft structure, one end with a small diameter is fixedly connected with a pressing plate 22 through a bolt, one end with a large diameter abuts against the wedging surfaces 30, a first mounting hole 31 is formed in the valve core 13, the first spring 23 is sleeved on the push rod 29, two ends of the first spring respectively abut against the side walls of the push rod 29 and the first mounting hole 31, the driving rod 4 is positioned at the center of the valve rod 6, one end of the driving rod 4 is in bolted connection with the valve rod 6, the other end of the driving rod abuts against the sliding seat 21, the same pressing plate 22 is connected with the two push rods 29, the inclined plane 32 has an inclination angle of 15-30 degrees, the end part of the driving rod 4 is provided with a knob groove 5, the bottom of the sliding seat is provided with the two second springs 28, the valve core 13 is provided with a second mounting hole 33 for mounting the second spring 28, the valve core 13 comprises a core seat 25 and a core cover 20 which are connected through a bolt, the power part 11 is mounted on the core seat 25, a sealing sleeve is provided with a convex rib 15 for limiting the rotation of the valve seat, and a groove 15 matched with the valve seat 8.

The sealing plate 19 is of an arc-shaped structure, the elastic device 9 comprises a mounting plate 18, a connecting rod 36 and a third spring 16, the connecting rod 36 is symmetrically provided with four connecting rods, two ends of each connecting rod are respectively in threaded connection with the mounting plate 18 and the sealing plate 19, the connecting rod 36 is sleeved with the connecting rod, the connecting rod is located on the outer side of the valve seat 8, two stop blocks 37 are arranged on one side, close to the valve seat 8, of the mounting plate 18, a flow guide bulge 38 is arranged in the middle of the two stop blocks 37, a movable clamping device 14 is arranged between the valve element 13 and the sealing plate 19, the movable clamping device 14 comprises an insertion column 35, positioning clamping bulges 26 and a fourth spring 24, the insertion column 35 is of a circular truncated cone structure and is located on the sealing plate 19, a positioning hole matched with the insertion column 35 is formed in the valve element 13, an annular groove 34 is formed in the insertion column 35, the positioning clamping bulges 26 and the fourth spring 24 are both provided with two positioning holes, the positioning blocks are horizontally installed on two sides of the positioning hole, and a plug 27 is arranged on the outer side of the fourth spring 24.

The working principle is as follows: when the gate valve needs to be closed, the valve rod 6 drives the valve core 13 and the driving rod 4 to descend synchronously by rotating the hand wheel 3, when the valve core 13 is opposite to the sealing ring 10, the pressing plate 22 is abutted against the inclined surface 32 of the core seat 25 under the action of the first spring 23, then a hexagonal wrench is inserted into the knob groove 5 and rotates the driving rod 4, so that the driving rod 4 descends relative to the valve rod 6, one end of the driving rod presses the sliding seat 21 downwards, the second spring 28 is compressed, the wedging surface 30 on the sliding seat 21 and the end of the push rod 29 move relatively, the push rod 29 is pushed to move to compress the first spring 23, the push rod 29 drives the pressing plate 22 to move towards the direction of the vertical inclined surface 32 and finally abuts against the sealing ring 10, sealing is achieved, the moving distance of the push rod 29 is determined by the first mounting hole 31, damage to parts caused by overpressure between the pressing plate 22 and the sealing ring 10 is avoided, the inclined surface 32 is 15-30 degrees, when fluid pressure acts on the pressing plate 22, the acting force in the direction of the vertical inclined surface 32 is reduced, the two push rods 29 can bear the fluid pressure of the larger, the sealing ring 22 and the sealing ring 10 is convenient to be matched with the sealing ring 10, and the sealing ring can be better in a sealing environment, and the sealing environment.

Meanwhile, when the gate valve is closed, after the valve core 13 descends, the insert column 35 on the sealing plate 19 can be inserted into the positioning hole, the positioning clamping protrusion 26 is firstly stressed to compress the fourth spring 24, then under the elastic force of the fourth spring 24, the positioning clamping protrusion 26 is clamped into the annular groove 34, so that positioning clamping is realized, when the gate valve needs to be opened, the driving rod 4 is firstly rotated reversely, the second spring 28 can drive the sliding seat 21 to reset, the push rod 29 retracts towards the inner side of the core seat 25 under the elastic force of the first spring 23, so that the press plate 22 is abutted against the inclined surface 32 of the core seat 25, a gap is reserved between the sealing ring 10 and the press plate 22, fluid can pass through the gap, then the hand wheel 3 is rotated reversely, so that the valve rod 6 drives the valve core 13 to move to the highest point, so that the gate valve is completely opened, when the valve core 13 moves upwards, the clamping force of the positioning clamping protrusion 26 on the insert column 35 is greater than the elastic force of the third spring 16, so that the sealing plate 19 is pulled to move upwards for a short time, the slag discharge port 17 is opened, and the situation that impurities in the slag discharge port 17 can be prevented from being blocked in the short-time can be discharged.

And after the gate valve used a period, also can be through pressing mounting panel 18, make the compression of third spring 16, connecting rod 36 can drive closing plate 19 rebound, thereby make row's cinder notch 17 not sheltered from, impurity in the installation cavity 12 can be discharged from row's cinder notch 17 under fluidic drive, need not to close the gate valve, dog 37 and water conservancy diversion arch 38 can be with fluid to both sides water conservancy diversion, fluidic flow direction is parallel with passageway 1, can avoid splashing the operator on one's body, when releasing mounting panel 18, third spring 16 can drive closing plate 19 and reset and shelter from row's cinder notch 17 again and realize the self sealedly, and easy operation can effectively regularly clear up the gate valve.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A high-temperature high-pressure self-sealing gate valve, which comprises a valve seat (8), a valve core (13) and a valve rod (6), it is characterized in that the valve seat (8) is provided with a channel (1), the middle part of the valve seat is provided with an installation cavity (12), a cover plate (2) is arranged at the top of the mounting cavity (12), a mounting seat (7) is arranged on the cover plate (2), one end of the valve rod (6) passes through the mounting seat (7) and the cover plate (2) to be fixedly connected with the valve core (13), the other end is provided with a hand wheel (3), the two sides of the valve seat (8) corresponding to the mounting cavity (12) are provided with sealing rings (10), two sides of the valve core (13) are provided with inclined planes (32) matched with the sealing ring (10), a pressure plate (22) is also arranged on the valve core (13), a power part (11) which drives the pressure plate (22) to slide along the direction of the vertical inclined plane (32) and is butted with the sealing ring (10) is arranged on the inner side of the valve core (13), a slag discharge port (17) is arranged at the bottom of the mounting cavity (12), and a sealing plate (19) for covering the slag discharge hole (17) is arranged in the mounting cavity (12), and an elastic device (9) which enables the sealing plate (19) to abut against the bottom of the mounting cavity (12) is arranged on the outer side of the valve seat (8).

2. The high-temperature high-pressure self-sealing gate valve according to claim 1, wherein the power member (11) comprises a driving rod (4), a sliding seat (21), a push rod (29) and a first spring (23), the sliding seat (21) is slidably mounted in the valve core (13), two sides of the sliding seat are provided with wedging surfaces (30), the push rod (29) is of a stepped shaft structure, one end with a small diameter is fixedly connected with the pressing plate (22) through a bolt, one end with a large diameter abuts against the wedging surfaces (30), a first mounting hole (31) is formed in the valve core (13), the first spring (23) is sleeved on the push rod (29), two ends of the first spring respectively abut against the side walls of the push rod (29) and the first mounting hole (31), the driving rod (4) is located at the center of the valve rod (6), one end of the driving rod (4) is bolted with the valve rod (6), and the other end of the driving rod abuts against the sliding seat (21).

3. A high-temperature high-pressure self-sealing gate valve according to claim 2, characterized in that two push rods (29) are connected to the same pressure plate (22), the inclined angle of the inclined surface (32) is 15-30 °, and a knob groove (5) is arranged at the end of the driving rod (4).

4. A high-temperature high-pressure self-sealing gate valve according to claim 2, characterized in that two second springs (28) are arranged at the bottom of the sliding seat (21), and a second mounting hole (33) for mounting the second spring (28) is arranged on the valve core (13).

5. A high temperature and high pressure self-sealing gate valve according to claim 2, wherein the valve core (13) comprises a core base (25) and a core cover (20) which are connected through a bolt, and the power member (11) is mounted on the core base (25).

6. The high-temperature high-pressure self-sealing gate valve according to claim 1, wherein the sealing plate (19) is of an arc-shaped structure, the elastic device (9) comprises a mounting plate (18), four connecting rods (36) and a third spring (16), the four connecting rods (36) are symmetrically arranged, two ends of each connecting rod are respectively in threaded connection with the mounting plate (18) and the sealing plate (19), and the connecting rods (36) are sleeved with the connecting rods and are located on the outer side of the valve seat (8).

7. A high-temperature high-pressure self-sealing gate valve according to claim 6, characterized in that two blocks (37) are arranged on one side of the mounting plate (18) close to the valve seat (8), and a flow guide protrusion (38) is arranged in the middle of the two blocks (37).

8. The high-temperature high-pressure self-sealing gate valve according to claim 6, wherein a movable clamping device (14) is arranged between the valve element (13) and the sealing plate (19), the movable clamping device (14) comprises an insertion column (35), a positioning clamping protrusion (26) and a fourth spring (24), the insertion column (35) is of a circular truncated cone structure and is located on the sealing plate (19), the valve element (13) is provided with a positioning hole matched with the insertion column (35), the insertion column (35) is provided with an annular groove (34), the positioning clamping protrusion (26) and the fourth spring (24) are respectively provided with two positioning clamping protrusions and two positioning clamping protrusions, the positioning clamping protrusions and the fourth spring (24) are horizontally arranged on two sides of the positioning hole, and a plug (27) is arranged on the outer side of the fourth spring (24).

9. A high-temperature high-pressure self-sealing gate valve according to claim 1, wherein the sealing sleeve is provided with a rib (15) for limiting the rotation of the sealing sleeve, and the valve seat (8) is provided with a groove matched with the rib (15).