A high-pressure wear-resistant gate valve

Abstract

The present application relates to the field of valves, and discloses a high-pressure wear-resistant gate valve, including a rectangular plate, a lifting assembly; a rotating assembly; a valve assembly; a gate valve assembly; a buffer assembly and a pressure reducing assembly. The present invention is equipped with a pressure reducing assembly. When the gate plate rises, the electric valve rotates and opens, allowing the connecting pipe to pass through. The water flow in the convex bend pipe will flow again due to the cancellation of the right-side obstruction. The water flow will impact the three drainage cones, compressing the first spring. The circular shaft will also drive the drainage cone to move a distance to the right side of the triangular plate. When the water flow impacts the drainage cone, part of the water flow will flow into the connecting pipe due to the guidance of the spiral groove. At this time, the area at the water inlet end of the shell will share the pressure brought by the water flow, forming a pressure reduction during flow, solving the problem of poor high-pressure performance of the existing equipment at the beginning of the gate plate flow.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a high-pressure wear-resistant gate valve. Background Art

[0002] As a key control valve in industrial pipeline systems, gate valves are widely used in petroleum, chemical, electric power, metallurgy and other fields. Their performance directly affects the safety and operating efficiency of the system. In high-pressure transmission scenarios, such as long-distance oil and gas pipelines, high-pressure steam systems and other working conditions, the high-pressure environment will place extremely high demands on the valve body's structural strength, sealing performance and pressure-bearing capacity. If the design is unreasonable, it is easy to cause valve body deformation, seal failure or medium leakage, causing safety hazards; conventional wear-resistant materials or surface treatment technologies are difficult to take into account both high-pressure bearing and long-term wear resistance requirements. Therefore, it is necessary to design a structure that can withstand the high pressure difference at the beginning of the gate flow and be wear-resistant when the gate is closed. Summary of the Invention

[0003] The present application proposes a high-pressure wear-resistant gate valve, which has the advantage of resisting water flow pressure and is used to solve the problem of poor performance of the gate in withstanding high pressure at the beginning of flow.

[0004] To achieve the above-mentioned object, the present application adopts the following technical solution: a high-pressure wear-resistant gate valve, comprising a rectangular plate, a plurality of support plates fixedly mounted on the top of the rectangular plate, a lifting assembly fixedly mounted on both sides of the plurality of support plates, and a linkage buffer gate valve mechanism, comprising a rotating assembly fixedly mounted on the middle part of the lifting assembly, a valve assembly fixedly mounted on the top of the plurality of support plates, a gate valve assembly fixedly mounted on the inner top side of the valve assembly, and a buffer assembly mounted on the outer edge of the gate valve assembly;

[0005] A pressure reducing assembly is installed on the left side of the interior of the valve assembly. The pressure reducing assembly includes two fixed shafts, three convex bent pipes are installed between the two fixed shafts, a triangular plate is installed on the right side of the three convex bent pipes, three circular shafts are installed on the left side of the triangular plate, the left ends of the three circular shafts are fixedly connected to the drainage cones, the outer surfaces of the three drainage cones are provided with spiral grooves, and the outer edges of the three circular shafts are sleeved with first springs.

[0006] Preferably, the three convex curved pipes are installed around between two fixed axes, the left sides of the three drainage cones correspond to the right sides of the three convex curved pipes, the right ends of the three first springs are elastically connected to the triangular plate, and the outer edges of the three convex curved pipes are supported by a support plate. The above structure can provide a buffering effect on water flow pressure during operation.

[0007] Preferably, the lifting assembly includes a vertical plate, two first hydraulic rods are fixedly installed on the inner top of the vertical plate, and movable plates are fixedly installed on the telescopic ends of the two first hydraulic rods. The two sides of the movable plates are movably clamped in the vertical plate. The above structure can drive the rotating assembly to move vertically during operation.

[0008] Preferably, the rotating assembly includes a horizontal bar, which is installed through the middle of the two movable plates. A track plate is fixedly installed in the middle position of the horizontal bar. Two racks are slidably installed on the bottom side of the track plate. The left and right ends of the two racks are fixedly connected to a second hydraulic rod, and the inner sides of the two racks are meshed with gears. The above structure can control the opening and closing of the gate valve during operation.

[0009] Preferably, the gear is rotatably mounted on the bottom side of the track plate, and the fixed ends of the four second hydraulic rods are all installed through the two movable plates.

[0010] Preferably, the valve assembly includes a shell, which is fixedly installed on the top of the support plate. The shell is divided into a left water inlet end, a right water outlet end and a top control end. The outer edge of the right end of the shell and the outer edge of the left fixed shaft are fixedly installed with a connecting ring, the back of the shell is fixedly connected to a connecting pipe, the middle position of the connecting pipe is fixedly installed with an electric valve, and the bottom of the shell is fixedly installed with a limit block.

[0011] Preferably, a fixed shaft and a triangular plate are fixedly connected to the left inner wall of the shell in sequence, the left end of the connecting pipe is fixedly connected to the water inlet end of the shell, and the other end is fixedly connected to the water outlet end of the shell.

[0012] Preferably, the gate valve assembly includes a sealing plate, which is fixedly installed on the top of the shell, and the sealing plate is divided into a bottom plate and a top plate. A plurality of bolts are installed between the bottom plate and the bottom plate. A thread is provided on the inner side of the sealing plate, and a screw is connected to the inner thread of the sealing plate. A swivel and a gate plate are fixedly installed on the top and bottom of the screw respectively. The above structure can block or connect the water flow during operation.

[0013] Preferably, the top end of the screw is fixedly connected to the bottom side of the gear, and the gate plate abuts against the limit block when sealing the housing;

[0014] Preferably, a plurality of first curved holes are opened through the interior of the movable ring, a second spring is fixedly connected to the top of the movable ring, a fixed ring is elastically connected to the top of the second spring, a plurality of second curved holes are opened through the interior of the fixed ring, the bending directions of the first curved holes and the second curved holes are opposite, and the fixed ring is fixedly sleeved on the outer edge of the screw rod. The above structure can buffer the backflow of water during operation.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention is equipped with a pressure reducing assembly. When the gate plate rises, the electric valve rotates and opens, allowing the connecting pipe to pass through. The water flow in the convex bent pipe will flow again due to the cancellation of the obstruction on the right side. The water flow will impact the three drainage cones, compressing the first spring. The circular shaft will also drive the drainage cone to move a distance to the right side of the triangular plate. When the water flow impacts the drainage cone, part of the water flow will flow into the connecting pipe due to the guidance of the spiral groove. At this time, the area at the water inlet end of the shell will share the pressure brought by the water flow, forming a pressure reduction during flow, which solves the problem of poor high-pressure performance of existing equipment at the beginning of gate flow.

[0017] 2. The present invention is designed with a buffer component. The backflowing water flow will first squeeze the movable ring and cause the second spring to contract. Part of the water flow will go upward through the first bend hole, and then fill the upper cavity of the shell after passing through the second bend hole, and finally be blocked by the sealing plate. Because the curved pipelines of the first bend hole and the second bend hole are opposite, the backflowing water flow will have its pressure greatly reduced again, thereby protecting the entire gate valve assembly and improving the structural wear resistance when the gate is closed.

[0018] 3. The present invention is designed with a mechanism that cooperates with a lifting assembly and a rotating assembly. Four second hydraulic rods are linked together, two of which extend and two shorten the stroke, thereby driving two symmetrical racks to move and driving the gear to rotate counterclockwise. At this time, the screw will continue to rotate upward in the sealing plate. At the same time, the first hydraulic rod increases the stroke, pushing the movable plate upward and making it move upward in the vertical plate, driving the entire rotating assembly to move upward, thereby cooperating with the continuously rotating screw, and the hydraulic direct drive force is converted into rotational force, which can achieve greater rotational torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A schematic diagram of the structure at center A;

[0022] Figure 3 This is a schematic structural diagram of the rotating assembly of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the valve assembly of the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 6 This is a schematic structural diagram of the gate valve assembly of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the decompression assembly of the present invention;

[0027] Figure 8 This is a schematic structural diagram of the buffer assembly of the present invention.

[0028] Among them: 1. rectangular plate; 2. lifting assembly; 3. rotating assembly; 4. valve assembly; 5. pressure reducing assembly; 6. gate valve assembly; 7. buffer assembly; 11. support plate; 21. vertical plate; 22. first hydraulic rod; 23. movable plate; 31. horizontal bar; 32. track plate; 33. rack; 34. second hydraulic rod; 35. gear; 41. housing; 42. connecting ring; 43. connecting pipe; 44. electric valve; 45. limit block; 51. fixed shaft; 52. convex bend; 53. triangular plate; 54. circular shaft; 55. drainage cone; 56. spiral groove; 57. first spring; 61. sealing plate; 62. bolt; 63. swivel; 64. screw; 65. gate; 71. movable ring; 72. first bend hole; 73. second spring; 74. fixed ring; 75. second bend hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] See also Figures 1-8 The high-pressure wear-resistant gate valve of this embodiment includes a rectangular plate 1, a plurality of support plates 11 are fixedly mounted on the top of the rectangular plate 1, a lifting assembly 2 is fixedly mounted on both sides of the plurality of support plates 11, and a linkage buffer gate valve mechanism includes a rotating assembly 3, the rotating assembly 3 is fixedly mounted on the middle part of the lifting assembly 2, a valve assembly 4 is fixedly mounted on the top of the plurality of support plates 11, a gate valve assembly 6 is fixedly mounted on the inner top side of the valve assembly 4, and a buffer assembly 7 is mounted on the outer edge of the gate valve assembly 6;

[0031] The pressure reducing assembly 5 is installed on the left side of the interior of the valve assembly 4. The pressure reducing assembly 5 includes two fixed shafts 51, three convex elbows 52 are installed between the two fixed shafts 51, and a triangular plate 53 is installed on the right side of the three convex elbows 52. Three circular shafts 54 are installed on the left side of the triangular plate 53. The left ends of the three circular shafts 54 are fixedly connected to the drainage cones 55. The outer surfaces of the three drainage cones 55 are provided with spiral grooves 56. The outer edges of the three circular shafts 54 are sleeved with first springs 57; the three convex elbows 52 are installed around the two fixed shafts 51, and the left sides of the three drainage cones 55 correspond to the right sides of the three convex elbows 52. The right ends of the three first springs 57 are elastically connected to the triangular plate 53, and the outer edges of the three convex elbows 52 are supported by the support plate 11;

[0032] As the gate plate 65 rises, the electric valve 44 rotates and opens, allowing the connecting pipe 43 to pass through. The water flow in the convex bend pipe 52 will flow again due to the removal of the right-side obstruction. The water flow will impact the three diversion cones 55, compressing the first spring 57. The circular shaft 54 will also drive the diversion cone 55 to move a distance to the right side of the triangular plate 53. When the water flow impacts the diversion cone 55, part of the water flow will flow into the connecting pipe 43 due to the guidance of the spiral groove 56. At this time, the area of the water inlet end of the housing 41 will share the pressure brought by the water flow, forming a pressure reduction during the flow.

[0033] The lifting assembly 2 includes a vertical plate 21, two first hydraulic rods 22 are fixedly installed on the top of the vertical plate 21, and movable plates 23 are fixedly installed on the telescopic ends of the two first hydraulic rods 22. The two sides of the movable plates 23 are movably connected to the vertical plate 21.

[0034] The first hydraulic rod 22 increases its stroke, pushing the movable plate 23 upward and causing it to move upward within the vertical plate 21, driving the entire rotating assembly 3 to move upward, thereby cooperating with the screw 64 that is continuously rotated out;

[0035] The rotating assembly 3 includes a horizontal bar 31, which is installed through the middle of the two movable plates 23. A track plate 32 is fixedly installed in the middle of the horizontal bar 31. Two racks 33 are slidably installed on the bottom side of the track plate 32. The left and right ends of the two racks 33 are fixedly connected to second hydraulic rods 34. The inner sides of the two racks 33 are meshed with gears 35; the gear 35 is rotatably installed on the bottom side of the track plate 32, and the fixed ends of the four second hydraulic rods 34 are all installed through the two movable plates 23.

[0036] The four second hydraulic rods 34 work in tandem, with two extending and the other shortening their strokes, thereby driving the two symmetrical racks 33 to move and drive the gear 35 to rotate counterclockwise. At this time, the screw 64 will continue to rotate upward in the sealing plate 61, pushing the gear 35 to rotate clockwise, thereby cutting off the water flow in the housing 41.

[0037] Among them, the valve assembly 4 includes a shell 41, which is fixedly installed on the top of the support plate 11. The shell 41 is divided into a left water inlet end, a right water outlet end and a top control end. The outer edge of the right end of the shell 41 and the outer edge of the left fixed shaft 51 are fixedly installed with a connecting ring 42. The back of the shell 41 is fixedly connected to a connecting pipe 43, and an electric valve 44 is fixedly installed in the middle position of the connecting pipe 43. A limit block 45 is fixedly installed at the bottom of the shell 41; the left inner wall of the shell 41 is fixedly connected with the fixed shaft 51 and the triangular plate 53 in sequence. The left end of the connecting pipe 43 is fixedly connected to the water inlet end of the shell 41, and the other end is fixedly connected to the water outlet end of the shell 41;

[0038] As the gate plate 65 rises, the electric valve 44 rotates and opens, allowing the connecting pipe 43 to pass through. Part of the water flow will flow into the connecting pipe 43 due to the guidance of the spiral groove 56. At this time, the area at the water inlet end of the shell 41 will share the pressure brought by the water flow.

[0039] The gate valve assembly 6 includes a sealing plate 61, which is fixedly mounted on the top of the housing 41. The sealing plate 61 is divided into a bottom plate and a top plate. A plurality of bolts 62 are installed between the bottom plate and the bottom plate. The inner side of the sealing plate 61 is provided with a thread. The inner side of the sealing plate 61 is threadedly connected to a screw 64. A swivel 63 and a gate plate 65 are fixedly mounted on the top and bottom of the screw 64, respectively. The top of the screw 64 is fixedly connected to the bottom side of the gear 35. When the gate plate 65 seals the housing 41, it abuts against the limit block 45.

[0040] When the screw 64 is continuously rotated upward in the sealing plate 61, the gate 65 moves upward under the pull of the screw 64, thereby removing the blockage of the water inlet and outlet in the housing 41. When the gate 65 moves downward and causes the electric valve 44 to rotate and close, the water flow in the housing 41 can be gradually cut off through the gate 65.

[0041] The buffer assembly 7 includes a movable ring 71, a plurality of first curved holes 72 extending therethrough, a second spring 73 fixedly connected to the top of the movable ring 71, a fixed ring 74 elastically connected to the top of the second spring 73, a plurality of second curved holes 75 extending therethrough, the first curved holes 72 and the second curved holes 75 having opposite bending directions, and the fixed ring 74 fixedly sleeved on the outer edge of the screw 64;

[0042] The backflowing water flow will first squeeze the movable ring 71 and cause the second spring 73 to contract. Part of the water flow will go upward through the first bend hole 72 and then through the second bend hole 75 to fill the upper cavity of the shell 41 and finally be blocked by the sealing plate 61. Because the curved pipes of the first bend hole 72 and the second bend hole 75 are opposite, the backflowing water flow will have its pressure greatly reduced again, thereby protecting the entire gate valve assembly 6.

[0043] Working principle:

[0044] When the present invention is used, when the gate plate 65 is in a closed state relative to the housing 41, the lifting assembly 2 and the rotating assembly 3 are started, and the four second hydraulic rods 34 cooperate with each other, with two extending and two shortening their strokes, thereby driving the two symmetrical racks 33 to move, and the driving gear 35 to rotate counterclockwise. At this time, the screw 64 will continuously rotate upward in the sealing plate 61. At the same time, the first hydraulic rod 22 increases its stroke, pushing the movable plate 23 upward and causing it to move upward in the vertical plate 21, driving the entire rotating assembly 3 to also move upward, thereby cooperating with the continuously rotating screw 64;

[0045] The gate plate 65 will move upward under the pull of the screw 64, and remove the blockage of the water inlet and outlet ends in the housing 41. At the same time as the gate plate 65 rises, the electric valve 44 rotates and opens, allowing the connecting pipe 43 to pass through. At this time, the water flow in the convex elbow 52 will flow again due to the removal of the obstruction on the right side. The water flow will impact the three diversion cones 55, compressing the first spring 57. The circular shaft 54 will also drive the diversion cone 55 to move a distance to the right side of the triangular plate 53. When the water flow impacts the diversion cone 55, part of the water flow will flow into the connecting pipe 43 due to the guidance of the spiral groove 56. At this time, the area of the water inlet end of the housing 41 will share the pressure brought by the water flow, forming a pressure reduction during the flow.

[0046] When it is necessary to cut off the water flow in the shell 41, the gear 35 is pushed clockwise to rotate, and the lifting assembly 2 and the rotating assembly 3 descend at the same time, driving the gate 65 to move downward and causing the electric valve 44 to rotate and close. When the gate 65 gradually cuts off the water flow in the shell 41, part of the water flow will flow back upward. The backflowing water will first squeeze the movable ring 71 and cause the second spring 73 to shrink. Part of the water flow will pass through the first bend hole 72 upward, and then pass through the second bend hole 75 to fill the upper part of the cavity of the shell 41, and finally be blocked by the sealing plate 61. Because the curved pipelines of the first bend hole 72 and the second bend hole 75 are opposite, the backflowing water flow will be greatly reduced in pressure again, thereby protecting the entire gate valve assembly 6.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-pressure wear-resistant gate valve, comprising a rectangular plate (1), characterized in that: A plurality of support plates (11) are fixedly mounted on the top of the rectangular plate (1), and a lifting assembly (2) is fixedly mounted on both sides of the plurality of support plates (11), further comprising: A linked buffer gate valve mechanism, comprising a rotating assembly (3), the rotating assembly (3) being fixedly mounted on the middle portion of a lifting assembly (2), a valve assembly (4) being fixedly mounted on the top of a plurality of support plates (11), a gate valve assembly (6) being fixedly mounted on the inner top side of the valve assembly (4), and a buffer assembly (7) being mounted on the outer edge of the gate valve assembly (6); A pressure reducing assembly (5) is installed on the left side of the interior of the valve assembly (4), the pressure reducing assembly (5) comprising two fixed shafts (51), three convex curved pipes (52) are installed between the two fixed shafts (51), a triangular plate (53) is installed on the right side of the three convex curved pipes (52), three circular shafts (54) are installed on the left side of the triangular plate (53), the left ends of the three circular shafts (54) are fixedly connected to a drainage cone (55), the outer surfaces of the three drainage cones (55) are each provided with a spiral groove (56), and the outer edges of the three circular shafts (54) are each sleeved with a first spring (57); The back of the housing (41) is fixedly connected to a connecting pipe (43), and the middle position of the connecting pipe (43) is fixedly installed with an electric valve (44). The left end of the connecting pipe (43) is fixedly connected to the water inlet end of the housing (41), and the other end is fixedly connected to the water outlet end of the housing (41). The electric valve (44) is rotated to open, so that the connecting pipe (43) can pass through. At this time, the water flow in the convex curved pipe (52) will flow again due to the cancellation of the right-side obstruction. The water flow will impact the three drainage cones (55), compressing the first spring (57). The circular shaft (54) will also drive the drainage cone (55) to move a distance to the right side of the triangular plate (53). When the water flow impacts the drainage cone (55), part of the water flow will flow into the connecting pipe (43) due to the guidance of the spiral groove (56). At this time, the area of the water inlet end of the housing (41) will share the pressure brought by the water flow, forming a pressure reduction during the flow.

2. A high-pressure wear-resistant gate valve according to claim 1, characterized in that: The three convex curved tubes (52) are mounted around the two fixed shafts (51), the left sides of the three drainage cones (55) correspond to the right sides of the three convex curved tubes (52), the right ends of the three first springs (57) are elastically connected to the triangular plate (53), and the outer edges of the three convex curved tubes (52) are supported by a support plate (11).

3. A high-pressure wear-resistant gate valve according to claim 1, characterized in that: The lifting assembly (2) comprises a vertical plate (21), two first hydraulic rods (22) are fixedly mounted on the top end of the vertical plate (21), movable plates (23) are fixedly mounted on the telescopic ends of the two first hydraulic rods (22), and both sides of the movable plates (23) are movably clamped in the vertical plate (21).

4. A high-pressure wear-resistant gate valve according to claim 3, characterized in that: The rotating assembly (3) includes a horizontal bar (31), which is installed through the middle of the two movable plates (23). A track plate (32) is fixedly installed at the middle position of the horizontal bar (31), and two racks (33) are slidably installed on the bottom side of the track plate (32). The left and right ends of the two racks (33) are fixedly connected to a second hydraulic rod (34), and the inner sides of the two racks (33) are meshed with gears (35).

5. A high-pressure wear-resistant gate valve according to claim 4, characterized in that: The gear (35) is rotatably mounted on the bottom side of the track plate (32), and the fixed ends of the four second hydraulic rods (34) are all installed through the two movable plates (23).

6. A high-pressure wear-resistant gate valve according to claim 5, characterized in that: The valve assembly (4) comprises a housing (41), the housing (41) being fixedly mounted on the top of the support plate (11), the housing (41) being divided into a left water inlet end, a right water outlet end and a top control end, a connecting ring (42) being fixedly mounted on the outer edge of the right end of the housing (41) and the outer edge of the left fixed shaft (51), and a limit block (45) being fixedly mounted on the bottom of the housing (41).

7. A high-pressure wear-resistant gate valve according to claim 6, characterized in that: The left inner wall of the housing (41) is fixedly connected in sequence with a fixed shaft (51) and a triangular plate (53).

8. A high-pressure wear-resistant gate valve according to claim 6, characterized in that: The gate valve assembly (6) includes a sealing plate (61), which is fixedly mounted on the top of the housing (41). The sealing plate (61) is divided into a bottom plate and a top plate. A plurality of bolts (62) are installed between the bottom plate and the bottom plate. The inner side of the sealing plate (61) is provided with a thread. The inner side of the sealing plate (61) is threadedly connected to a screw rod (64). The top and bottom of the screw rod (64) are respectively fixedly mounted with a swivel (63) and a gate plate (65).

9. A high-pressure wear-resistant gate valve according to claim 8, characterized in that: The top end of the screw (64) is fixedly connected to the bottom side of the gear (35), and the gate (65) abuts against the limit block (45) when sealing the housing (41).

10. A high-pressure wear-resistant gate valve according to claim 9, characterized in that: The buffer assembly (7) includes a movable ring (71), a plurality of first curved holes (72) are formed inside the movable ring (71), a second spring (73) is fixedly connected to the top of the movable ring (71), a fixed ring (74) is elastically connected to the top of the second spring (73), a plurality of second curved holes (75) are formed inside the fixed ring (74), the first curved holes (72) and the second curved holes (75) have opposite bending directions, and the fixed ring (74) is fixedly sleeved on the outer edge of the screw rod (64).

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