A high-temperature and high-pressure self-sealing gate valve
The high-temperature, high-pressure self-sealing gate valve addresses wear issues in conventional designs by using a sliding pressure plate mechanism and self-cleaning features, enhancing sealing and extending the valve's lifespan.
Patent Information
- Application Number
- CN202211561165.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-07
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2042-12-07
AI Technical Summary
The existing gate valves have poor sealing properties in high-pressure environments and severe wear of the gate plates, resulting in a short service life and cannot meet the sealing requirements of high-temperature and high-pressure environments.
A high-temperature and high-pressure self-sealing gate valve is designed. By setting up a pressure plate and a power piece, the driving rod is used to push the sliding seat and push rod to drive the pressure plate to slide along the vertical inclined surface to inflect with the sealing ring. Combined with the slag discharge port and the elastic device, the sealing effect is achieved, and the impurities are automatically cleaned through the coordination of the movable clamping device and the sealing plate.
In high-pressure environment, the wear of the pressure plate and sealing ring is reduced, the service life of the gate valve is extended, and the accumulation of impurities is avoided through the automatic cleaning function, which improves sealing and reliability of use.
Smart Images
Figure CN115727143B_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a high-temperature and high-pressure self-sealing gate valve, belonging to the technical field of valves. Background Art
[0002] Gate valves usually control the full opening and closing of the valve by opening and closing the gate in a direction perpendicular to the direction of fluid movement. They are widely used in fields such as water conservancy and oil and gas pipelines to conveniently and flexibly control the opening and closing of connecting pipelines. Existing gate valves usually drive the valve stem through a handwheel on the outside of the valve body to lift or lower the gate, thereby opening or closing the pipeline.
[0003] There are usually two types of gate plates for existing gate valves, namely a flat structure and an inclined structure. The gate valve relies on the side cooperation with the valve seat to achieve sealing. However, both types of gate plates will wear out during sealing, resulting in the need to replace the gate plates after a period of use. Especially in high-pressure environments, higher requirements are placed on sealing performance, and conventional gate valves cannot meet the requirements. Summary of the invention
[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a high-temperature and high-pressure self-sealing gate valve.
[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a high-temperature and high-pressure self-sealing gate valve, comprising a valve seat, a valve core and a valve stem, the valve seat being provided with a channel and a mounting cavity being provided in the middle, the top of the mounting cavity being provided with a cover plate, the cover plate being provided with a mounting seat, one end of the valve stem passing through the mounting seat and the cover plate and being fixedly connected to the valve core, and the other end being provided with a handwheel, sealing rings being provided on both sides of the valve seat corresponding to the mounting cavity, both sides of the valve core having inclined surfaces matching the sealing ring, and a pressure plate being further provided on the valve core, a power part driving the pressure plate to slide along a direction perpendicular to the inclined surface and to contact the sealing ring being provided on the inner side of the valve core, a slag discharge port being provided at the bottom of the mounting cavity, and a sealing plate covering the slag discharge port being provided in the mounting cavity, and an elastic device for making the sealing plate abut against the bottom of the mounting cavity being provided on the outer side of the valve seat.
[0006] Preferably, the power part includes a driving rod, a sliding seat, a push rod and a first spring. The sliding seat is slidably installed in the valve core, and has wedging surfaces on both sides thereof. The push rod is a stepped shaft structure, and the end with a small diameter is fixedly connected to the pressure plate by bolts, and the end with a large diameter is against the wedging surface. A first mounting hole is provided in the valve core, and the first spring is sleeved on the push rod, and the two ends are respectively against the push rod and the side walls of the first mounting hole. The driving rod is located at the center of the valve stem, and one end of the driving rod is bolted to the valve stem, and the other end is against the sliding seat.
[0007] Preferably, two push rods are connected to the same pressing plate, and the inclination angle of the inclined surface is 15-30°, and a knob groove is provided at the end of the driving rod.
[0008] Preferably, two second springs are arranged at the bottom of the sliding seat, and a second mounting hole for mounting the second spring is arranged on the valve core.
[0009] Preferably, the valve core comprises a core seat and a core cover connected by bolts, and the power member is mounted on the core seat.
[0010] Preferably, the sealing plate is an arc-shaped structure, the elastic device includes a mounting plate, a connecting rod and a third spring, four connecting rods are symmetrically arranged, and both ends are respectively threadedly connected to the mounting plate and the sealing plate, the third spring is sleeved on the connecting rod and is located on the outside of the valve seat.
[0011] Preferably, two blocks are provided on one side of the mounting plate close to the valve seat, and a flow guide protrusion is provided between the two blocks.
[0012] Preferably, a movable clamping device is provided between the valve core and the sealing plate, and the movable clamping device includes a plug post, a positioning clamping protrusion and a fourth spring. The plug post is a truncated cone structure and is located on the sealing plate. The valve core is provided with a positioning hole cooperating with the plug post, and the plug post is provided with an annular groove. Two of the positioning clamping protrusion and the fourth spring are provided and horizontally installed on both sides of the positioning hole. A plug is provided on the outer side of the fourth spring.
[0013] Preferably, the sealing ring is provided with a ridge for limiting its rotation, and the valve seat is provided with a groove cooperating with the ridge.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. By setting the pressure plate and the power part, the driving rod is used to push the sliding seat to slide downward, so as to force the push rod to push the pressure plate to slide along the vertical slope and contact with the sealing ring, thereby closing the gate valve. Since the force of the fluid on the pressure plate is not perpendicular to the push rod, the force on the push rod is weakened, which can be applied to high-pressure environments, and the wear of the pressure plate and the sealing ring is small, which extends the service life of the gate valve.
[0016] 2. By setting a slag discharge port at the bottom of the installation cavity, the sealing can be achieved by the sealing plate under normal conditions. When the gate valve needs to be cleaned, it is only necessary to push the installation plate upward to open the slag discharge port to prevent impurities from accumulating in the installation cavity. The block and the guide protrusion can guide the fluid to both sides to avoid splashing on the operator. When the valve core moves down and hits the plug column, it can remain clamped. When the valve core moves upward, it also pulls the sealing plate upward. The slag discharge port opens and closes automatically in a short time, which can also achieve the cleaning effect. Brief Description of the Drawings
[0017] Figure 1 It is a schematic structural view of a high-temperature and high-pressure self-sealing gate valve of the present invention;
[0018] Figure 2 It is a cross-sectional view of a high-temperature and high-pressure self-sealing gate valve of the present invention;
[0019] Figure 3 It is an exploded view of the pressing plate, the power component and the valve core in the present invention;
[0020] Figure 4 It is a schematic structural view of the core seat in the present invention;
[0021] Figure 5 It is a schematic structural view of the elastic device in the present invention;
[0022] Reference numerals: 1, passage; 2, cover plate; 3, handwheel; 4, driving rod; 5, knob groove; 6, valve stem; 7, mounting seat; 8, valve seat; 9, elastic device; 10, sealing ring; 11, power component; 12, mounting cavity; 13, valve core; 14, movable clamping device; 15, convex rib; 16, third spring; 17, slag discharge port; 18, mounting plate; 19, sealing plate; 20, core cover; 21, sliding seat; 22, pressing plate; 23, first spring; 24, fourth spring; 25, core seat; 26, positioning and clamping projection; 27, plug; 28, second spring; 29, push rod; 30, wedging surface; 31, first mounting hole; 32, inclined surface; 33, second mounting hole; 34, annular groove; 35, inserting post; 36, connecting rod; 37, stop block; 38, guide bulge. Detailed Description of the Invention
[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] Such as Figures 1-5As shown in the figure, a high-temperature and high-pressure self-sealing gate valve includes a valve seat 8, a valve core 13 and a valve stem 6. The valve seat 8 is provided with a channel 1 and an installation cavity 12 is arranged in the middle. A cover plate 2 is arranged at the top of the installation cavity 12. An installation seat 7 is arranged on the cover plate 2. One end of the valve stem 6 passes through the installation seat 7 and the cover plate 2 and is fixedly connected to the valve core 13. The other end is provided with a handwheel 3. Sealing rings 10 are arranged on both sides of the valve seat 8 corresponding to the installation cavity 12. Both sides of the valve core 13 have inclined surfaces 32 that cooperate with the sealing rings 10. A pressing plate 22 is also arranged on the valve core 13. A power member 11 for driving the pressing plate 22 to slide along the direction perpendicular to the inclined surface 32 and abut against the sealing ring 10 is arranged inside the valve core 13. A slag discharge port 17 is arranged at the bottom of the installation cavity 12, and a sealing plate 19 covering the slag discharge port 17 is arranged in the installation cavity 12. An elastic device 9 for making the sealing plate 19 abut against the bottom of the installation cavity 12 is arranged outside the valve seat 8.
[0025] The power member 11 includes a driving rod 4, a sliding seat 21, a push rod 29 and a first spring 23. The sliding seat 21 is slidably installed in the valve core 13, and wedge tightening surfaces 30 are arranged on both sides thereof. The push rod 29 is a stepped shaft structure. The end with a smaller diameter is fixedly connected to the pressing plate 22 through a bolt, and the end with a larger diameter abuts against the wedge tightening surface 30. A first installation hole 31 is arranged in the valve core 13. The first spring 23 is sleeved on the push rod 29, and both ends respectively abut against the push rod 29 and the side wall of the first installation hole 31. The driving rod 4 is located at the center of the valve stem 6, and one end of the driving rod 4 is bolted to the valve stem 6, and the other end abuts against the sliding seat 21. Two push rods 29 are connected to the same pressing plate 22, and the inclination angle of the inclined surface 32 is 15-30°. A knob groove 5 is arranged at the end of the driving rod 4. Two second springs 28 are arranged at the bottom of the sliding seat. A second installation hole 33 for installing the second spring 28 is arranged on the valve core 13. The valve core 13 includes a core seat 25 and a core cover 20 connected by bolts. The power member 11 is installed on the core seat 25. A convex rib 15 for restricting its self-rotation is arranged on the sealing ring 10. A groove cooperating with the convex rib 15 is arranged on the valve seat 8.
[0026] The sealing plate 19 is of an arc structure. The elastic device 9 includes a mounting plate 18, a connecting rod 36, and a third spring 16. Four connecting rods 36 are symmetrically arranged, and the two ends are respectively threadedly connected to the mounting plate 18 and the sealing plate 19. The third spring 16 is sleeved on the connecting rod 36 and is located outside the valve seat 8. Two stoppers 37 are provided on the side of the mounting plate 18 close to the valve seat 8, and a diversion protrusion 38 is provided between the two stoppers 37. An active clamping device 14 is provided between the valve core 13 and the sealing plate 19. The active clamping device 14 includes a plug post 35, a positioning convex 26, and a fourth spring 24. The plug post 35 is of a frustum structure and is located on the sealing plate 19. A positioning hole matching the plug post 35 is provided on the valve core 13. An annular groove 34 is provided on the plug post 35. Two positioning convexes 26 and two fourth springs 24 are provided and are horizontally installed on both sides of the positioning hole. A plug 27 is provided on the outside of the fourth spring 24.
[0027] Working principle: When it is necessary to close the gate valve, by rotating the handwheel 3, the valve stem 6 drives the valve core 13 and the drive rod 4 to descend synchronously. When the valve core 13 is aligned with the sealing ring 10, at this time, the pressing plate 22 abuts against the inclined surface 32 of the core seat 25 under the action of the first spring 23. Subsequently, a hexagonal wrench is inserted into the knob groove 5 and the drive rod 4 is rotated, so that the drive rod 4 descends relative to the valve stem 6, and one end of it presses down on the sliding seat 21. The second spring 28 is compressed, and a relative movement occurs between the wedging surface 30 on the sliding seat 21 and the end of the push rod 29, and the push rod 29 is pushed to move and compress the first spring 23, so that the push rod 29 drives the pressing plate 22 to move in a direction perpendicular to the inclined surface 32 and finally abuts against the sealing ring 10, thereby achieving sealing. The moving distance of the push rod 29 is determined by the first mounting hole 31 to prevent overpressure between the pressing plate 22 and the sealing ring 10 and cause damage to parts. The inclined surface 32 is 15 - 30°. When the fluid pressure acts on the pressing plate 22, the acting force in the direction perpendicular to the inclined surface 32 decreases. The two push rods 29 can withstand a greater fluid pressure, and it is also convenient for the cooperation between the pressing plate 22 and the sealing ring 10. The mating surface between the two is larger, the sealing effect is better, and it can adapt to a high-pressure working environment.
[0028] Meanwhile, when the gate valve is closed, after the valve core 13 descends, the insertion post 35 on the sealing plate 19 can be inserted into the positioning hole. The positioning convex 26 is first forced to compress the fourth spring 24, and then under the elastic force of the fourth spring 24, the positioning convex 26 is snapped into the annular groove 34, thus realizing positioning and clamping. When it is necessary to open the gate valve, first rotate the driving rod 4 in the reverse direction. The second spring 28 will drive the sliding seat 21 to reset. The push rod 29 retracts towards the inside of the core seat 25 under the elastic force of the first spring 23, so that the pressing plate 22 abuts against the inclined surface 32 of the core seat 25. There is a gap between the sealing ring 10 and the pressing plate 22, and the fluid can pass through the gap. Then rotate the hand wheel 3 in the reverse direction, so that the valve stem 6 drives the valve core 13 to move to the highest point, thus completely opening the gate valve. When the valve core 13 moves upward, the clamping force of the positioning convex 26 on the insertion post 35 is greater than the elastic force of the third spring 16, so as to pull the sealing plate 19 to move upward a small distance. At this time, the slag discharge port 17 is opened. As the third spring 16 is compressed due to force, its elastic force gradually increases, so that the insertion post 35 disengages from the positioning convex 26, and the sealing plate 19 closes the slag discharge port 17 again. In this way, the impurities in the installation cavity 12 can be discharged in a short time, and the situation that the pipeline will not be blocked can be avoided.
[0029] After the gate valve has been used for a period of time, the installation plate 18 can also be pressed to compress the third spring 16. The connecting rod 36 can drive the sealing plate 19 to move upward, so that the slag discharge port 17 is not blocked. The impurities in the installation cavity 12 will be discharged from the slag discharge port 17 under the drive of the fluid without closing the gate valve. The stop block 37 and the diversion protrusion 38 can divert the fluid to both sides. The flow direction of the fluid is parallel to the channel 1, which can avoid splashing on the operator. When the installation plate 18 is released, the third spring 16 can drive the sealing plate 19 to reset and block the slag discharge port 17 again to achieve self-sealing. The operation is simple, and the gate valve can be effectively cleaned regularly.
[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.
[0031] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A high-temperature and high-pressure self-sealing gate valve, comprising a valve seat (8), a valve core (13) and a valve stem (6), characterized in that, The valve seat (8) is provided with a channel (1), and an installation cavity (12) is arranged in the middle. A cover plate (2) is arranged at the top of the installation cavity (12). An installation seat (7) is arranged on the cover plate (2). One end of the valve rod (6) passes through the installation seat (7) and the cover plate (2) and is fixedly connected with the valve core (13), and the other end is provided with a hand wheel (3). Sealing rings (10) are arranged on both sides of the valve seat (8) corresponding to the installation cavity (12). Both sides of the valve core (13) have inclined surfaces (32) that cooperate with the sealing rings (10), and a pressing plate (22) is also arranged on the valve core (13). A power member (11) for driving the pressing plate (22) to slide along the direction perpendicular to the inclined surface (32) and abut against the sealing ring (10) is arranged inside the valve core (13). A slag discharge port (17) is arranged at the bottom of the installation cavity (12), and a sealing plate (19) covering the slag discharge port (17) is arranged in the installation cavity (12). An elastic device (9) for making the sealing plate (19) abut against the bottom of the installation cavity (12) is arranged outside the valve seat (8). The power member (11) includes a driving rod (4), a sliding seat (21), a push rod (29), and a first spring (23). The sliding seat (21) is slidably installed inside the valve core (13), and wedge tightening surfaces (30) are arranged on both sides thereof. The push rod (29) has a stepped shaft structure. The end with a smaller diameter is fixedly connected with the pressing plate (22) by a bolt, and the end with a larger diameter abuts against the wedge tightening surface (30). A first installation hole (31) is arranged inside the valve core (13). The first spring (23) is sleeved on the push rod (29), and both ends respectively abut against the side walls of the push rod (29) and the first installation hole (31). The driving rod (4) is located at the center of the valve rod (6), and one end of the driving rod (4) is bolted to the valve rod (6), and the other end abuts against the sliding seat (21). Two push rods (29) are connected to the same pressing plate (22), and the inclination angle of the inclined surface (32) is 15 - 30°. A knob groove (5) is arranged at the end of the driving rod (4). Two second springs (28) are arranged at the bottom of the sliding seat (21). Second installation holes (33) for installing the second springs (28) are arranged on the valve core (13).
2. The high-temperature and high-pressure self-sealing gate valve according to claim 1, wherein The valve core (13) includes a core seat (25) and a core cover (20) connected by bolts, and the power member (11) is installed on the core seat (25).
3. The high-temperature and high-pressure self-sealing gate valve according to claim 1, characterized in that, The sealing plate (19) has an arc-shaped structure. The elastic device (9) includes a mounting plate (18), a connecting rod (36), and a third spring (16). Four connecting rods (36) are symmetrically arranged, and both ends are respectively threadedly connected with the mounting plate (18) and the sealing plate (19). The third spring (16) is sleeved on the connecting rod (36) and is located outside the valve seat (8).
4. The high-temperature and high-pressure self-sealing gate valve according to claim 3, characterized in that, Two stoppers (37) are arranged on one side of the mounting plate (18) close to the valve seat (8), and a diversion protrusion (38) is arranged between the two stoppers (37).
5. The high-temperature and high-pressure self-sealing gate valve according to claim 3, characterized in that, An active clamping device (14) is provided between the valve core (13) and the sealing plate (19). The active clamping device (14) includes an insertion post (35), a positioning clamping projection (26), and a fourth spring (24). The insertion post (35) has a frustum structure and is located on the sealing plate (19). A positioning hole matching the insertion post (35) is provided on the valve core (13). An annular groove (34) is provided on the insertion post (35). There are two positioning clamping projections (26) and two fourth springs (24), which are horizontally installed on both sides of the positioning hole. A plug (27) is provided on the outer side of the fourth spring (24).
6. A high-temperature and high-pressure self-sealing gate valve according to claim 1, characterized in that, A convex rib (15) for restricting its self-rotation is provided on the sealing ring (10), and a groove matching the convex rib (15) is provided on the valve seat (8).
Citation Information
Patent Citations
Three-linkage expansion-type gate valve
CN103883751A
Automobile fuel tank
CN2644206Y