Wear-resistant high-voltage power station gate valve

Abstract

The invention discloses a wear-resistant high-pressure power station gate valve, and belongs to the technical field of gate valves, the wear-resistant high-pressure power station gate valve comprises a lower valve shell, an upper valve shell is arranged at the upper end of the lower valve shell, a gasket is arranged between the lower valve shell and the upper valve shell, and the lower valve shell and the upper valve shell are fixed through a plurality of fixing bolts. A valve rod is slidably connected to the upper end of the upper valve shell in a penetrating mode, a supporting frame is fixedly connected to the upper end of the upper valve shell, a first sealing mechanism is arranged at the lower end of the valve rod, a second sealing mechanism is arranged between the lower valve shell and the upper valve shell, and a third sealing mechanism is arranged between the valve rod and the upper valve shell. Through the use of the first sealing mechanism, the second sealing mechanism and the third sealing mechanism, the abrasion of the second valve element is greatly reduced, the sealing performance among the upper valve shell, the lower valve shell and the valve rod is improved, meanwhile, through the use of the bypass valve, the pressure difference on the two sides can be balanced, the operation difficulty and the equipment loss are reduced, and the system safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gate valves, and particularly relates to a wear-resistant high-pressure power station gate valve. BACKGROUND

[0002] The high-pressure power station gate valve is a special valve specially designed for high-temperature and high-pressure pipelines in power station systems such as thermal power, hydraulic power and nuclear power. Its core function is to reliably cut off or connect the medium (such as water flow and steam) in the pipeline, and to completely isolate the pipeline system when maintenance or failure occurs. It is solid in structure, has excellent sealing performance and extremely high pressure-bearing capacity, and is a key control equipment for ensuring the safe and stable operation of the power station power system.

[0003] Since the gate valve is used in a high-temperature and high-pressure environment, wear is easily generated between the valve core and the pipeline, which leads to a decrease in sealing performance. At the same time, the medium of high temperature and high pressure also generates a large pressure on the joint between the valve stem and the valve shell, which affects the overall sealing effect. SUMMARY

[0004] The technical problem to be solved by the application is to overcome the shortcomings of the prior art and provide a wear-resistant high-pressure power station gate valve.

[0005] The technical scheme adopted to solve the above technical problem is as follows: a wear-resistant high-pressure power station gate valve, comprising a lower valve shell, an upper valve shell arranged at the upper end of the lower valve shell, a gasket arranged between the lower valve shell and the upper valve shell, the lower valve shell and the upper valve shell being fixed by a plurality of fixing bolts, a valve stem slidingly connected to the upper end of the upper valve shell, a support frame fixedly connected to the upper end of the upper valve shell, a first sealing mechanism arranged at the lower end of the valve stem, a second sealing mechanism arranged between the lower valve shell and the upper valve shell, and a third sealing mechanism arranged between the valve stem and the upper valve shell. The first sealing mechanism comprises a second valve core fixedly connected to the lower end of the valve stem, a second spring fixedly connected to the inner upper end of the second valve core, a fixed plate fixedly connected to the lower end of the second spring, a connecting rod rotatably connected to both ends of the fixed plate, a fixed seat rotatably connected to the end of the connecting rod away from the fixed plate, and a moving plate fixedly connected to the end of the fixed seat away from the connecting rod.

[0006] Through the use of the first sealing mechanism, the second sealing mechanism and the third sealing mechanism, the wear of the second valve core is greatly reduced, and the sealing performance between the upper valve shell, the lower valve shell and the valve stem is improved.

[0007] Further, the lower valve shell is fixedly connected with a connecting pipe at both ends, a flange is fixedly connected with the end of the connecting pipe away from the lower valve shell, a bypass pipe is fixedly connected with the connecting pipe, a bypass valve is arranged on the bypass pipe, a support frame is fixedly connected with the upper end of the upper valve shell, a hand wheel is rotatably connected with the upper end of the support frame, the hand wheel is in threaded cooperation with the valve rod, and a reinforcing rib is arranged between the lower valve shell and the connecting pipe.

[0008] Through the above technical scheme, the use of the bypass valve can balance the pressure difference on both sides, reduce the operation difficulty and equipment loss, ensure the safety of the system, and the hand wheel drives the valve rod to lift and lower, and the valve rod drives the second valve core to lift and lower, so as to open or close the valve.

[0009] Further, a first groove and a second groove are arranged in the end of the connecting pipe close to the lower valve shell, a first spring is fixedly connected in the first groove, a sealing ring is fixedly connected with the end of the first spring away from the first groove, a sealing plate is fixedly connected with the end of the sealing ring away from the first spring, and a first sealing rubber ring is fixedly connected with the end of the sealing plate away from the sealing ring.

[0010] Through the above technical scheme, the high-pressure medium pushes the sealing plate in the first groove and the second groove, and the sealing plate is pressed against the second sealing rubber ring in cooperation with the moving plate under the pressure of the first spring and the high-pressure medium.

[0011] Further, a second sealing rubber ring is arranged between the moving plate and the sealing plate, the second sealing rubber ring is arranged in an inclined manner on both sides, the moving plate and the sealing plate are arranged in an inclined manner on the side close to the second sealing rubber ring, a plurality of slide rods are fixedly connected with the moving plate, through holes are arranged on both sides of the second valve core, the through holes and the slide rods are in sliding cooperation, a push rod is fixedly connected with the lower end of the fixed plate, a buffer head is fixedly connected with the end of the push rod away from the fixed plate, and the push rod penetrates through the second valve core in sliding connection.

[0012] Through the above technical scheme, when the second valve core descends, the lower valve shell pushes against the buffer head, the push rod pushes the fixed plate to move upwards, the fixed plate moves upwards to push the moving plate to the two sides through the connecting rod, and the sealing plate moves to the moving plate under the pushing of the high-pressure medium, the moving plate and the sealing plate simultaneously extrude the second sealing rubber ring, so as to improve the sealing effect, and in the process of lifting the second valve core, the second spring pushes the fixed plate to descend, so as to recover the moving plate, and in the process of lifting and descending the second valve core, the second sealing rubber ring does not need to be rubbed, so as to reduce the wear of the second valve core and improve the service life.

[0013] Further, the bypass valve comprises a valve body fixedly connected to the bypass pipe, a first valve core is rotationally connected in the valve body, a connecting shaft is fixedly connected to the first valve core, a handle is fixedly connected to an end of the connecting shaft away from the first valve core, and the connecting shaft penetrates the valve body.

[0014] Through the above technical scheme, when the valve needs to be opened, the bypass valve can be slowly opened first to balance the pressure on both sides of the second valve core, and after the pressure on both sides is basically the same, the valve can be easily opened in a state of nearly no pressure difference, which greatly reduces the operation difficulty and equipment loss, and ensures the safety of the system.

[0015] Further, the second sealing mechanism comprises a third groove opened in the upper valve shell, a fourth groove opened in the lower valve shell, a first wedge fixedly connected in the third groove, a second wedge fixedly connected in the fourth groove, and a push plate slidingly connected in the third groove and the fourth groove.

[0016] Through the above technical scheme, the first wedge and the second wedge can be pressed against each other by the movement of the push plate, so as to increase the pressure between the upper valve shell and the lower valve shell, thereby improving the sealing performance.

[0017] Further, a pair of third sealing rubber rings are fixedly connected to the push plate, a pair of support rods are fixedly connected to an end of the push plate close to the first wedge, and rollers are rotationally connected to an end of the support rods away from the push plate.

[0018] Through the above technical scheme, when the high-pressure medium fills the valve shell, the push plate is pushed to move outward, the push plate pushes the rollers to move through the support rods, and the rollers press the upper valve shell and the lower valve shell more closely through the first wedge and the second wedge, so that the sealing effect between the upper valve shell and the lower valve shell is greatly improved.

[0019] Further, the third sealing mechanism comprises a fifth groove opened in the upper valve shell, a rubber sleeve fixedly connected in the fifth groove, a first sealing valve fixedly connected to an upper end of the rubber sleeve, a second sealing valve fixedly connected to a lower end of the rubber sleeve, a sealing block fixedly connected to the rubber sleeve, and a plurality of communication pipes opened in the upper valve shell.

[0020] Through the above technical scheme, the high-pressure medium enters the space between the rubber sleeve and the upper valve shell through the communication pipes, so that the rubber sleeve expands, the first sealing valve and the second sealing valve are close to the valve rod, and the gap between the valve rod and the upper valve shell is blocked, and at the same time, the sealing block is pressed against the rubber sleeve under the blockage of the valve rod, so as to avoid that the rubber sleeve is over-expanded and cracked.

[0021] The beneficial effects of the present application are as follows: (1) the present application uses the first sealing mechanism, when the second valve core is lowered, the lower valve shell pushes against the buffer head, the fixed plate is pushed up by the push rod, the moving plate is pushed to both sides by the connecting rod through the upward movement of the fixed plate, and the sealing plate moves in the direction of the moving plate under the push of the high-pressure medium, the moving plate and the sealing plate simultaneously extrude the second sealing rubber ring, thereby improving the sealing effect, and in the process of the second valve core rising, the second spring pushes the fixed plate to descend, thereby recovering the moving plate, and in the process of the second valve core rising and falling, friction with the second sealing rubber ring is not required, thereby reducing the wear of the second valve core and improving the service life; (2) the present application uses the second sealing mechanism, when the high-pressure medium fills the valve shell, the push plate is pushed to move outward, the push plate pushes the roller to move through the support rod, the roller extrudes the upper valve shell and the lower valve shell more closely through the first wedge and the second wedge, and the sealing effect between the upper valve shell and the lower valve shell is greatly improved; (3) the present application uses the third sealing mechanism, high-pressure medium enters the communication pipe, the high-pressure medium enters the space between the rubber sleeve and the upper valve shell, the rubber sleeve is pushed to expand inward, the rubber sleeve drives the first sealing valve and the second sealing plate valve to extrude the valve rod, in the process of the movement of the valve rod, the gap between the valve rod and the upper valve shell is blocked by the first sealing valve and the second sealing valve, thereby avoiding leakage, and the use of the sealing block can avoid the rupture of the rubber sleeve due to excessive expansion. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the first perspective structural view of the present application; Figure 2 is the second perspective structural view of the present application; Figure 3 is the side view of the present application; Figure 4 is the A enlarged view of Figure 3 ; Figure 5 is the B enlarged view of Figure 3 ; Figure 6 is the C enlarged view of Figure 3 ; Figure 7 is the top view of the present application; Figure 8 is the first sealing mechanism explosion structural view of the present application; Figure 9 is the valve core explosion structural view of the present application; Figure 10 is the push plate structural view of the present application; Figure 11 is the third sealing mechanism sectional view of the present application; Figure 12 is the third sealing mechanism perspective view of the present application.

[0023] 1, lower valve shell; 2, upper valve shell; 3, fixing bolt; 4, valve rod; 5, bypass pipe; 6, bypass valve; 61, valve body; 62, first valve core; 63, connecting shaft; 64, handle; 7, first sealing mechanism; 71, first groove; 72, first spring; 73, second groove; 74, sealing ring; 75, sealing plate; 76, first sealing rubber ring; 77, second sealing rubber ring; 78, second valve core; 79, through hole; 710, sliding rod; 711, moving plate; 712, second spring; 713, fixed plate; 714, connecting rod; 715, fixed seat; 716, push rod; 717, buffer head; 8, second sealing mechanism; 81, third groove; 82, fourth groove; 83, first wedge; 84, second wedge; 85, push plate; 86, third sealing rubber ring; 87, supporting rod; 88, roller; 9, third sealing mechanism; 91, fifth groove; 92, communication pipe; 93, rubber sleeve; 94, first sealing valve; 95, sealing block; 96, second sealing valve; 10, support frame; 11, hand wheel; 12, reinforcing rib; 13, connecting pipeline; 14, flange. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0025] As Figures 1-12 shown in the embodiment, the wear-resistant high-pressure power station gate valve comprises a lower valve shell 1, an upper valve shell 2 is arranged at the upper end of the lower valve shell 1, a gasket is arranged between the lower valve shell 1 and the upper valve shell 2, the lower valve shell 1 and the upper valve shell 2 are fixed by a plurality of fixing bolts 3, a valve rod 4 is slidably connected to the upper end of the upper valve shell 2, a support frame 10 is fixedly connected to the upper end of the upper valve shell 2, the upper valve shell 2 and the lower valve shell 1 are pre-tightened by the fixing bolts 3, and the sealing effect is improved by the gasket.

[0026] The connecting pipeline 13 is fixedly connected to both ends of the lower valve shell 1, the flange 14 is fixedly connected to the end of the connecting pipeline 13 away from the lower valve shell 1, the bypass pipe 5 is fixedly connected to the connecting pipeline 13, the bypass valve 6 is arranged on the bypass pipe 5, the support frame 10 is fixedly connected to the upper end of the upper valve shell 2, the hand wheel 11 is rotatably connected to the upper end of the support frame 10, the hand wheel 11 is threadedly connected to the valve rod 4, the reinforcing rib 12 is arranged between the lower valve shell 1 and the connecting pipeline 13, the overall strength is improved by the reinforcing rib 12, and the gate valve is installed on the pipeline by the flange 14.

[0027] The bypass valve 6 comprises a valve body 61 fixedly connected to the bypass pipe 5, a first valve core 62 rotatably connected in the valve body 61, a connecting shaft 63 fixedly connected to the first valve core 62, a handle 64 fixedly connected to one end of the connecting shaft 63 away from the first valve core 62, and the connecting shaft 63 penetrates the rotatably connected valve body 61. When it is needed to close the valve, the handle 64 is first driven to rotate the connecting shaft 63, and the connecting shaft 63 drives the first valve core 62 to rotate, so as to close the bypass valve 6. When it is needed to open the valve, the handle 64 is first driven to slowly rotate the first valve core 62, so as to slowly open the bypass valve 6 and balance the pressure on both sides of the second valve core 78. After the pressure on both sides is basically the same, the valve can be easily opened in a state of nearly no pressure difference, which greatly reduces the operation difficulty and equipment loss and guarantees the system safety.

[0028] As shown in Figure 4 , Figure 6 、 Figure 8 and Figure 9 , the lower end of the valve rod 4 is provided with a first sealing mechanism 7. The first sealing mechanism 7 comprises a second valve core 78 fixedly connected to the lower end of the valve rod 4, a second spring 712 fixedly connected to the upper end in the second valve core 78, a fixed plate 713 fixedly connected to the lower end of the second spring 712, connecting rods 714 rotatably connected to both ends of the fixed plate 713, a fixed seat 715 rotatably connected to one end of the connecting rod 714 away from the fixed plate 713, a moving plate 711 fixedly connected to one end of the fixed seat 715 away from the connecting rod 714, and the hand wheel 11 is rotated to lower the valve rod 4. The valve rod 4 pushes the second valve core 78 to lower. In the process of lowering the second valve core 78, the buffer head 717 contacts the lower valve shell 1, the lower valve shell 1 abuts against the buffer head 717, the push rod 716 moves upward relative to the second valve core 78, thereby pushing the fixed plate 713 to move upward, and the fixed plate 713 moves the moving plate 711 to both sides through the connecting rod 714, thereby extruding the second sealing rubber ring 77.

[0029] The connecting pipe 13 is provided with a first recess 71 and a second recess 73 in one end close to the lower valve shell 1. The first recess 71 is fixedly connected with a first spring 72, one end of the first spring 72 away from the first recess 71 is fixedly connected with a sealing ring 74, one end of the sealing ring 74 away from the first spring 72 is fixedly connected with a sealing plate 75, and one end of the sealing plate 75 away from the sealing ring 74 is fixedly connected with a first sealing rubber ring 76. Since the connecting pipe 13 is filled with high-pressure medium, the high-pressure medium pushes the sealing plate 75 in the first recess 71 and the second recess 73. The sealing plate 75 is pressed tightly with the moving plate 711 under the pressure of the first spring 72 and the high-pressure medium, thereby improving the sealing effect. Meanwhile, the connecting rod 714 and the fixed seat 715 form a straight line, which can bear a larger pressure.

[0030] The second sealing rubber ring 77 is arranged between the moving plate 711 and the sealing plate 75, and is arranged in an inclined manner on both sides of the second sealing rubber ring 77; the side, close to the second sealing rubber ring 77, of the moving plate 711 and the sealing plate 75 is arranged in an inclined manner; a plurality of sliding rods 710 are fixedly connected to the moving plate 711; a through hole 79 is formed in each side of the second valve core 78; the through hole 79 and the sliding rod 710 are in sliding connection with each other; the lower end of the fixed plate 713 is fixedly connected with a push rod 716; the end, away from the fixed plate 713, of the push rod 716 is fixedly connected with a buffer head 717; the push rod 716 penetrates through and is in sliding connection with the second valve core 78; as the second valve core 78 rises, the second spring 712 pushes the fixed plate 713 to move downward; the fixed plate 713 retracts the moving plate 711 through the connecting rod 714, so as to avoid the abrasion between the moving plate 711 and the second sealing rubber ring 77, and greatly improve the overall service life.

[0031] As shown in Figure 5 and Figure 10 shown, the second sealing mechanism 8 is arranged between the lower valve shell 1 and the upper valve shell 2; the third groove 81 is formed in the upper valve shell 2; the fourth groove 82 is formed in the lower valve shell 1; the first wedge block 83 is fixedly connected in the third groove 81; the second wedge block 84 is fixedly connected in the fourth groove 82; the push plate 85 is in sliding connection with the third groove 81 and the fourth groove 82; the pair of third sealing rubber rings 86 is fixedly connected outside the push plate 85; the pair of support rods 87 is fixedly connected to the end, close to the first wedge block 83, of the push plate 85; the roller 88 is rotatably connected to the end, away from the push plate 85, of the support rod 87; when the high-pressure medium fills in the valve, the push plate 85 is pushed to move outward; the push plate 85 drives the roller 88 to move outward through the support rod 87; the roller 88, through the cooperation of the first wedge block 83 and the second wedge block 84, extrudes the upper valve shell 2 and the lower valve shell 1 relative to each other, and improves the sealing performance between the upper valve shell 2 and the lower valve shell 1.

[0032] As shown in Figure 11 and Figure 12 shown, the third sealing mechanism 9 is arranged between the valve rod 4 and the upper valve shell 2; the fifth groove 91 is formed in the upper valve shell 2; the rubber sleeve 93 is fixedly connected in the fifth groove 91; the first sealing valve 94 is fixedly connected to the upper end of the rubber sleeve 93; the second sealing valve 96 is fixedly connected to the lower end of the rubber sleeve 93; the sealing block 95 is fixedly connected in the rubber sleeve 93; a plurality of communication pipes 92 are formed in the upper valve shell 2; the high-pressure medium enters the space between the rubber sleeve 93 and the upper valve shell 2 through the communication pipe 92, so that the rubber sleeve 93 expands, the first sealing valve 94 and the second sealing valve 96 are close to the valve rod 4, and the gap between the valve rod 4 and the upper valve shell 2 is blocked; at the same time, the sealing block 95 is pressed against the rubber sleeve 93 under the block of the valve rod 4, so as to avoid that the rubber sleeve 93 is over-expanded and is cracked.

[0033] The working principle of the embodiment is as follows: the gate valve is installed on the pipeline through the flange plate 14, when it is needed to close the valve, the handle 64 is first driven to rotate the connecting shaft 63, the connecting shaft 63 drives the first valve core 62 to rotate, the bypass valve 6 is closed, then the hand wheel 11 is rotated, the valve rod 4 is lowered, the second valve core 78 is pushed down by the valve rod 4, in the process of the second valve core 78 being lowered, the buffer head 717 contacts the lower valve shell 1, the lower valve shell 1 abuts against the buffer head 717, the push rod 716 is moved upwards relative to the second valve core 78, so as to move the fixed plate 713 upwards, the fixed plate 713 moves the moving plate 711 to both sides through the connecting rod 714, so as to extrude the second sealing rubber ring 77.

[0034] Since the connecting pipeline 13 is filled with high-pressure medium, the high-pressure medium pushes the sealing plate 75 in the first groove 71 and the second groove 73, the sealing plate 75 is pressed tightly with the moving plate 711 under the pressure of the first spring 72 and the high-pressure medium, so as to improve the sealing effect, at the same time, the connecting rod 714 and the fixed seat 715 form a straight line, which can bear a larger pressure.

[0035] When it is needed to open the valve, the handle 64 is first driven to slowly rotate the first valve core 62, so as to slowly open the bypass valve 6, balance the pressure on both sides of the second valve core 78, after the pressure on both sides is basically consistent, the valve can be easily opened in the state of nearly no pressure difference, which greatly reduces the operation difficulty and equipment loss, guarantees the safety of the system, at the same time, with the rising of the second valve core 78, the second spring 712 pushes the fixed plate 713 to move downwards, the fixed plate 713 moves the moving plate 711 back through the connecting rod 714, so as to avoid the abrasion between the moving plate 711 and the second sealing rubber ring 77, which greatly improves the overall service life.

[0036] When the high-pressure medium fills in the valve, the push plate 85 is pushed to move outward, the push plate 85 drives the roller 88 to move outward through the supporting rod 87, the roller 88 extrudes the upper valve shell 2 and the lower valve shell 1 through the cooperation of the first wedge block 83 and the second wedge block 84, so as to improve the sealing between the upper valve shell 2 and the lower valve shell 1.

[0037] At the same time, the high-pressure medium enters the space between the rubber sleeve 93 and the upper valve shell 2 through the communication pipe 92, so that the rubber sleeve 93 expands, the first sealing valve 94 and the second sealing valve 96 are close to the sealing block 95 relative to the valve rod 4, the gap between the valve rod 4 and the upper valve shell 2 is blocked, at the same time, the sealing block 95 is abutted against the rubber sleeve 93 under the block of the valve rod 4, so as to avoid the rubber sleeve 93 from being burst due to overexpansion.

[0038] The above merely describes the preferred embodiment of the present application, but is not used to limit the protection scope of the present application.

Claims

1. A wear-resistant high-voltage power station gate valve, comprising a lower valve body (1), characterized in that: The lower valve housing (1) is provided with an upper valve housing (2) at its upper end. A gasket is provided between the lower valve housing (1) and the upper valve housing (2). The lower valve housing (1) and the upper valve housing (2) are fixed by several fixing bolts (3). A valve stem (4) is slidably connected through the upper end of the upper valve housing (2). A support frame (10) is fixedly connected to the upper end of the upper valve housing (2). A first sealing mechanism (7) is provided at the lower end of the valve stem (4). A second sealing mechanism (8) is provided between the lower valve housing (1) and the upper valve housing (2). A third sealing mechanism (9) is provided between the valve stem (4) and the upper valve housing (2). The first sealing mechanism (7) includes a second valve core (78) fixedly connected to the lower end of the valve stem (4). A second spring (712) is fixedly connected to the upper end of the second valve core (78). A fixed plate (713) is fixedly connected to the lower end of the second spring (712). Both ends of the fixed plate (713) are rotatably connected to connecting rods (714). A fixed seat (715) is rotatably connected to the end of the connecting rod (714) away from the fixed plate (713). A movable plate (711) is fixedly connected to the end of the fixed seat (715) away from the connecting rod (714).

2. The wear-resistant high-pressure power station gate valve according to claim 1, characterized in that, The lower valve housing (1) is fixedly connected to two ends of a connecting pipe (13). A flange (14) is fixedly connected to one end of the connecting pipe (13) away from the lower valve housing (1). A bypass pipe (5) is fixedly connected to the connecting pipe (13). A bypass valve (6) is installed on the bypass pipe (5). A support frame (10) is fixedly connected to the upper end of the upper valve housing (2). A handwheel (11) is rotatably connected to the upper end of the support frame (10). The handwheel (11) is threadedly engaged with the valve stem (4). A reinforcing rib (12) is provided between the lower valve housing (1) and the connecting pipe (13).

3. The wear-resistant high-pressure power station gate valve according to claim 2, characterized in that, The connecting pipe (13) has a first groove (71) and a second groove (73) at one end near the lower valve housing (1). A first spring (72) is fixedly connected in the first groove (71). A sealing ring (74) is fixedly connected at the end of the first spring (72) away from the first groove (71). A sealing plate (75) is fixedly connected at the end of the sealing ring (74) away from the first spring (72). A first sealing rubber ring (76) is fixedly connected at the end of the sealing plate (75) away from the sealing ring (74).

4. The wear-resistant high-pressure power station gate valve according to claim 3, characterized in that, A second sealing rubber ring (77) is provided between the movable plate (711) and the sealing plate (75). The second sealing rubber ring (77) is inclined on both sides. The movable plate (711) and the sealing plate (75) are both inclined on the side near the second sealing rubber ring (77). Several sliding rods (710) are fixedly connected to the movable plate (711). Through holes (79) are provided on both sides of the second valve core (78). The through holes (79) and the sliding rods (710) slide against each other. A push rod (716) is fixedly connected to the lower end of the fixed plate (713). A buffer head (717) is fixedly connected to the end of the push rod (716) away from the fixed plate (713). The push rod (716) slides through and connects to the second valve core (78).

5. A wear-resistant high-voltage power station gate valve according to claim 2, characterized in that, The bypass valve (6) includes a valve body (61) fixedly connected to the bypass pipe (5), a first valve core (62) rotatably connected inside the valve body (61), a connecting shaft (63) fixedly connected to the first valve core (62), a handle (64) fixedly connected to one end of the connecting shaft (63) away from the first valve core (62), and the connecting shaft (63) rotatably connecting the valve body (61) through it.

6. The wear-resistant high-pressure power station gate valve according to claim 1, characterized in that, The second sealing mechanism (8) includes a third groove (81) opened in the upper valve housing (2), a fourth groove (82) opened in the lower valve housing (1), a first wedge (83) fixedly connected in the third groove (81), a second wedge (84) fixedly connected in the fourth groove (82), and a push plate (85) slidably connected in the third groove (81) and the fourth groove (82).

7. A wear-resistant high-voltage power station gate valve according to claim 6, characterized in that, A pair of third sealing rubber rings (86) are fixedly connected to the outside of the push plate (85). A pair of support rods (87) are fixedly connected to one end of the push plate (85) near the first wedge (83). A roller (88) is rotatably connected to one end of the support rod (87) away from the push plate (85).

8. A wear-resistant high-voltage power station gate valve according to claim 1, characterized in that, The third sealing mechanism (9) includes a fifth groove (91) opened in the upper valve housing (2), a rubber sleeve (93) is fixedly connected in the fifth groove (91), a first sealing valve (94) is fixedly connected at the upper end of the rubber sleeve (93), a second sealing valve (96) is fixedly connected at the lower end of the rubber sleeve (93), a sealing block (95) is fixedly connected in the middle of the rubber sleeve (93), and several connecting pipes (92) are opened in the upper valve housing (2).

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