Power station gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a power station gate valve, which comprises a valve plate arranged in a valve body, communicated medium pipelines are symmetrically arranged at two ends of the bottom of the valve body, a filter plate is arranged at a port of each medium pipeline through a fixing piece, and a screw rod is in threaded connection with the top of the valve body. The bottom of the lead screw is located in the valve body and is in threaded connection with the valve plate, the valve plate can block the medium pipeline, the top of the valve body is provided with a protection assembly used for protecting the lead screw, and a filter plate is arranged at a port of the medium pipeline to prevent impurity particles in water from blocking the medium pipeline and affecting normal use of the gate valve. And in addition, a protection assembly is further arranged, a protection shell is conveniently fixed through a fixing rod to prevent the protection shell from being separated from the protection base, the situation that the fixing rod is separated from the protection shell and consequently the protection shell falls off can be prevented through the effect of a second unlocking rod, and the situation that a lead screw is rusted due to long-term contact with the outside, and operation is affected can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve for a power station. Background Art

[0002] A power station gate valve is a valve used to control the flow of fluid in the power station's media pipeline. It is usually used in important locations such as the power station's inlet and outlet media pipelines, boiler systems, cooling systems, etc. to control the flow, pressure and direction of the fluid. It usually has a large flow capacity and high sealing performance, which can ensure the normal operation and safety of the power station system.

[0003] In order to ensure the normal operation of the power station system, it is necessary to use a power station gate valve to control the flow. For example, the prior art Chinese patent announcement number "CN109058491 B" discloses a power station gate valve, including an exhaust pipe, a main body, a closing mechanism, a fixing plate, an extrusion mechanism, a fixing mechanism and a venting mechanism. The exhaust pipe is installed inside the main body, and the bottom end of the exhaust pipe extends into the two ends of the main body. The venting mechanism is installed inside the top of the exhaust pipe. When the pressure inside the medium pipeline is too large, the medium inside the medium pipeline pushes the venting mechanism to move inside the exhaust pipe, so that the outside world is connected to the medium pipeline, reducing the pressure inside the medium pipeline and avoiding the medium pipeline from bursting; the fixing mechanism is engaged at the bottom end of the exhaust pipe, and the fixing mechanism is connected to the extrusion mechanism, and the extrusion mechanism is fixedly connected to the closing mechanism. When the closing mechanism descends to close the inside of the main body, it drives the extrusion mechanism to move and squeeze the fixing mechanism, so that the fixing mechanism slides inside the exhaust pipe and the fixing plate, so that the exhaust pipe is connected to the inside of the main body, ensuring that when the inside of the main body is closed, the venting mechanism inside the exhaust pipe is connected to the main body, thereby maintaining the sensitivity of the venting mechanism.

[0004] Traditional gate valves do not have filtering measures on both sides of the medium pipeline. In actual operation, considering that the impurities and floating objects in the water may be in contact with the medium pipeline for a long time, the medium pipeline may be blocked and affect the operation of the power station. In addition, the screw rod is exposed to the air without protection measures. Long-term contact with the outside world may cause rust, making the screw rod difficult to twist and affecting the use of the gate valve. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art that the medium pipeline may be blocked by impurities and the screw rod is easy to rust, and proposes a power station gate valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A power station gate valve is designed, comprising a valve plate arranged in a valve body, two ends of the bottom of the valve body are symmetrically provided with communicating medium pipelines, the medium pipeline is provided with a filter plate at the port through a fixing member, the top of the valve body is threadedly connected with a screw rod, the bottom of the screw rod is located in the valve body and is threadedly connected with the valve plate, the valve plate can block the medium pipeline, and the top of the valve body is provided with a protective component for protecting the screw rod;

[0008] Among them, the protection component includes a protection seat provided on the top of the valve body, a protection shell is inserted in the protection seat, the screw rod is rotatably connected in the protection shell, the sides of the protection shell are penetrated by slots, and the internal sliding connection of the two sides of the protection seat is provided with fixed rods, and the fixed rods can be inserted into the slots.

[0009] Furthermore, the fixing member includes a mounting groove provided on one side of the medium pipeline port, the top of the filter plate is rotatably connected to the mounting groove via a rotating shaft, and a first torsion spring is provided inside the mounting groove and is located on the outer periphery of the rotating shaft.

[0010] Furthermore, a guide rod is fixedly installed in the mounting groove, one end of the guide rod is slidably connected to the first unlocking rod and is sleeved with a second torsion spring, the two ends of the second torsion spring are respectively fixedly connected to the bottom surface of the mounting groove and the bottom of the first unlocking rod, a buckle is provided at the bottom of the first unlocking rod, and a clamping block is provided at the top of the filter plate through the clamping slot, and the buckle can be inserted into the clamping slot and clamp the clamping block.

[0011] Furthermore, a first spring is fixedly connected between the inner side surface of the protective seat and the fixed rod, a tooth plate is provided at the bottom of the fixed rod, a second unlocking rod is rotatably connected to the protective seat below the fixed rod, and a groove is provided on its inner side surface, one end of the second unlocking rod is provided with a protrusion that can be inserted into the groove, and a gear is fixedly installed on the other end, and the gear meshes and rotates with the tooth plate.

[0012] Furthermore, one end of the second unlocking rod is provided with a blocking piece and passes through the protective seat, and one end of the second unlocking rod is sleeved with a second spring, and the two ends of the second spring are respectively fixedly connected to the inner side surface of the protective seat and the side surface of the blocking piece.

[0013] The utility model proposes a power station gate valve, which has the following beneficial effects: the utility model provides a filter plate at the port of the medium pipeline to prevent impurity particles in the water from clogging the medium pipeline and affecting the normal use of the gate valve, and the fixing part facilitates the cleaning of both sides of the filter plate. In addition, a protective component is provided, and a fixing rod is used to fix the protective shell to prevent it from being separated from the protective seat, and the second unlocking rod can also prevent the fixing rod from being separated from the protective shell, causing the protective shell to fall off, and can effectively prevent the screw rod from being rusted due to long-term contact with the outside world and affecting the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the filter plate of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of area A;

[0017] Figure 4 This is a schematic diagram of the structure of the protective shell of the utility model;

[0018] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area B;

[0019] Figure 6 It is a cross-sectional view of the second unlocking lever of the utility model;

[0020] Figure 7 It is a cross-sectional view of the utility model.

[0021] In the figure: 1. valve body; 2. valve plate; 3. medium pipeline; 4. fixing member; 41. mounting groove; 42. rotating shaft; 43. first torsion spring; 44. guide rod; 45. first unlocking rod; 46. second torsion spring; 47. buckle; 48. slot; 49. block; 5. filter plate; 6. screw rod; 7. protection assembly; 71. protection seat; 711. groove; 72. protection shell; 73. slot; 74. fixing rod; 741. tooth plate; 75. first spring; 76. second unlocking rod; 761. bump; 762. baffle; 77. gear; 78. second spring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-7A power station gate valve, comprising a valve plate 2 arranged in a valve body 1, two ends of the bottom of the valve body 1 are symmetrically provided with communicating medium pipelines 3, the medium pipeline 3 is provided with a filter plate 5 at the port through a fixing member 4, the top of the valve body 1 is threadedly connected with a screw rod 6, the bottom of the screw rod 6 is located in the valve body 1 and is threadedly connected with the valve plate 2, the valve plate 2 can block the medium pipeline 3, and the top of the valve body 1 is provided with a protective component 7 for protecting the screw rod 6;

[0024] Among them, the protection component 7 includes a protection seat 71 provided on the top of the valve body 1, a protection shell 72 is inserted in the protection seat 71, the screw rod 6 is rotatably connected in the protection shell 72, and the sides of the protection shell 72 are penetrated by slots 73. The internal sliding connection of the two sides of the protection seat 71 is provided with a fixing rod 74, and the fixing rod 74 can be inserted into the slot 73. By the action of the fixing rod 74 being inserted into the slot 73, the protection seat 71 and the protection shell 72 are fixed.

[0025] It is worth mentioning that the valve plate 2 is slidably connected to the top of the valve body 1 and a sealing gasket is provided on its side. The valve plate 2 blocks the medium pipeline 3 through the sealing gasket to achieve the effect of cutting off the flow, and a handwheel is provided on the top of the screw rod 6.

[0026] Furthermore, the fixing member 4 includes a mounting groove 41 provided at one side of the port of the medium pipeline 3, the top of the filter plate 5 is rotatably connected to the mounting groove 41 through a rotating shaft 42, and a first torsion spring 43 is provided inside the outer periphery of the rotating shaft 42;

[0027] It should be added that, under normal circumstances, due to the action of the first torsion spring 43, the filter plate 5 and the medium pipeline 3 are in a vertical state. Under the action of the fixing member 4, the filter plate 5 and the medium pipeline 3 are closed. The vertical arrangement between the filter plate 5 and the medium pipeline 3 facilitates cleaning of both sides thereof to prevent accumulation of impurities and particles.

[0028] Furthermore, a guide rod 44 is fixedly installed in the installation groove 41, one end of the guide rod 44 is slidably connected to the first unlocking rod 45 and is sleeved with a second torsion spring 46, the two ends of the second torsion spring 46 are respectively fixedly connected to the bottom surface of the installation groove 41 and the bottom of the first unlocking rod 45, a buckle 47 is provided at the bottom of the first unlocking rod 45, and a clamping block 49 is provided at the top of the filter plate 5 through a clamping slot 48, and the buckle 47 can be inserted into the clamping slot 48 and clamp the clamping block 49.

[0029] It should be noted that the slot 48 has a certain space, so that when the first unlocking rod 45 is pressed, the buckle 47 can move in the slot 48, so that the block 49 can be engaged with the buckle 47, and the buckle 47 can be disengaged from the block 49 by rotating the first unlocking rod 45.

[0030] In general, a first spring 75 is fixedly connected between the inner side surface of the protective seat 71 and the fixed rod 74, a tooth plate 741 is provided at the bottom of the fixed rod 74, a second unlocking rod 76 is rotatably connected to the protective seat 71 below the fixed rod 74, and a groove 711 is provided on its inner side surface, one end of the second unlocking rod 76 is provided with a protrusion 761 that can be inserted into the groove 711, and a gear 77 is fixedly installed on the other end, and the gear 77 is meshed and rotated with the tooth plate 741.

[0031] In detail, the first spring 75 provides a supporting force for the fixing rod 74 so that it cooperates with the second unlocking rod 76 to be tightly inserted into the slot 73. The first spring 75 also has the function of assisting the second unlocking rod 76 to quickly insert and fix the fixing rod 74 when the second unlocking rod 76 is rotated to drive the fixing rod 74 to be inserted into the slot 73.

[0032] Finally, one end of the second unlocking rod 76 is provided with a blocking piece 762 and passes through the protective seat 71. One end of the second unlocking rod 76 is sleeved with a second spring 78. The two ends of the second spring 78 are respectively fixedly connected to the inner side surface of the protective seat 71 and the side surface of the blocking piece 762.

[0033] The specific operation is that under the action of the second spring 78, the protrusion 761 is engaged with the groove 711 to fix the second unlocking rod 76, so that the second unlocking rod 76 will not rotate due to accidental touch to cause the fixing rod 74 to be separated from the slot 73;

[0034] In addition, by clamping the protrusion 761 through the groove 711, the fixing rod 74 can also be fixed when the protective shell 72 is replaced, which facilitates the disassembly and assembly of the protective shell 72. After that, the second unlocking rod 76 is pulled out to disengage the protrusion 761 from the groove 711 so that it can be rotated and the fixing rod 74 can be inserted into the slot 73.

[0035] Working mode: When working, the first unlocking lever 45 is rotated to disengage the buckle 47 from the block 49, and the filter plate 5 is turned over under the action of the first torsion spring 43 to clean both sides thereof;

[0036] Then, the protective shell 72 is inserted into the protective seat 71, and the second unlocking rod 76 is pulled out toward the side of the second spring 78 to make the protrusion 761 disengage from the groove 711, and then the second unlocking rod 76 is rotated to drive the gear 77 to rotate together, and the fixing rod 74 is inserted into the slot 73 under the rotation of the gear 77 and the support of the first spring 75;

[0037] Finally, the second unlocking rod 76 is released, and under the action of the second spring 78 , the second unlocking rod 76 moves and the protrusion 761 is inserted into the groove 711 again, thereby achieving the effect of fixing the second unlocking rod 76 .

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power station gate valve, comprising a valve plate (2) arranged in a valve body (1), characterized in that: The two ends of the bottom of the valve body (1) are symmetrically provided with interconnected medium pipes (3); the medium pipe (3) is provided with a filter plate (5) at the port through a fixing member (4); the top of the valve body (1) is threadedly connected with a screw rod (6); the bottom of the screw rod (6) is located inside the valve body (1) and is threadedly connected with the valve plate (2); the valve plate (2) is capable of blocking the medium pipe (3); the top of the valve body (1) is provided with a protective component (7) for protecting the screw rod (6); The protection assembly (7) comprises a protection seat (71) provided on the top of the valve body (1), a protection shell (72) is inserted into the protection seat (71), the screw rod (6) is rotatably connected to the protection shell (72), the sides of the protection shell (72) are penetrated by slots (73), and the insides of both sides of the protection seat (71) are slidably connected with fixed rods (74), and the fixed rods (74) can be inserted into the slots (73).

2. A power station gate valve according to claim 1, characterized in that: The fixing member (4) comprises a mounting groove (41) provided on one side of the port of the medium pipeline (3); the top of the filter plate (5) is rotatably connected to the mounting groove (41) via a rotating shaft (42); and a first torsion spring (43) is provided inside the mounting groove and is located on the periphery of the rotating shaft (42).

3. A power station gate valve according to claim 2, characterized in that: A guide rod (44) is fixedly installed in the installation groove (41), one end of the guide rod (44) is slidably connected to a first unlocking rod (45) and is sleeved with a second torsion spring (46), the two ends of the second torsion spring (46) are respectively fixedly connected to the bottom surface of the installation groove (41) and the bottom of the first unlocking rod (45), a buckle (47) is provided at the bottom of the first unlocking rod (45), and a clamping block (49) is provided at the top of the filter plate (5) through a clamping groove (48), and the buckle (47) can be inserted into the clamping groove (48) and clamp the clamping block (49).

4. A power station gate valve according to claim 3, characterized in that: A first spring (75) is fixedly connected between the inner side surface of the protective seat (71) and the fixed rod (74); a tooth plate (741) is provided at the bottom of the fixed rod (74); a second unlocking rod (76) is rotatably connected below the fixed rod (74) in the protective seat (71), and a groove (711) is provided on the inner side surface thereof; one end of the second unlocking rod (76) is provided with a protrusion (761) that can be inserted into the groove (711), and a gear (77) is fixedly installed on the other end thereof; the gear (77) is meshed and rotatably engaged with the tooth plate (741).

5. A power station gate valve according to claim 4, characterized in that: One end of the second unlocking rod (76) is provided with a blocking piece (762) and passes through the protective seat (71); one end of the second unlocking rod (76) is sleeved with a second spring (78); two ends of the second spring (78) are respectively fixedly connected to the inner side surface of the protective seat (71) and the side surface of the blocking piece (762).

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