Power station sand washing valve opening and closing structure

Abstract

The utility model provides a power station sand washing valve opening and closing structure, and relates to the technical field of valve opening and closing structures, the power station sand washing valve opening and closing structure comprises a valve body, a valve core is arranged in the valve body, a cavity is arranged in the valve core, two sides of the valve core are provided with communication ports, the communication ports penetrate through the valve core, and the cavity is communicated with the cavity in the valve body through the communication ports. An outer shell is fixedly installed on the valve body, a motor is fixedly installed in the outer shell, a sealing piece is arranged in the cavity in a sliding mode, two guide rods arranged in a spaced mode penetrate through the sealing piece, the upper ends of the guide rods are fixedly connected to the outer shell, and a screw rod is fixedly installed at the output shaft end of the motor, penetrates through the sealing piece and is in threaded connection with the sealing piece. An air pressure balance mechanism is arranged on the valve element, a first bevel gear is fixedly installed on an output shaft of the motor, a rotating shaft is rotatably installed on the outer shell and extends into the outer shell, a second bevel gear is fixedly installed at one end of the rotating shaft, the second bevel gear is meshed with the first bevel gear, and a rotating disc is fixedly installed at the other end of the rotating shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of valve opening and closing structures, in particular to an opening and closing structure of a sand flushing valve in a power station. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. In order to better control the opening and closing of the valve, an opening and closing mechanism is required.

[0003] The valve opening and closing mechanism and valve disclosed in the publication number CN107559477A specifically include a valve body mechanism and a control mechanism. The valve body mechanism includes a piston; the control mechanism includes a proportional electromagnet and a valve stem connected to the movable iron core of the proportional electromagnet. One end of the valve stem is connected to the valve body mechanism. The proportional electromagnet controls the stroke of the piston through the valve stem to adjust the flow rate of the medium passing through the valve. The piston's rest position is electromagnetically adjusted to achieve the purpose of controlling the valve flow rate.

[0004] The existing opening and closing mechanism can generally only use electric or manual means to open and close the valve. When the electric equipment suddenly fails, it is difficult to ensure the normal operation of the opening and closing mechanism. In view of the above problems, it is necessary to improve the existing equipment. For this purpose, we propose a power station sand flushing valve opening and closing structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides an opening and closing structure for a sand flushing valve in a power station, which solves the problems raised by the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a power station sand flushing valve opening and closing structure, including a valve body, a valve core is provided in the valve body, a cavity is provided inside the valve core, and connecting ports are provided on both sides of the valve core, the connecting ports pass through the valve core, and the cavity is connected to the internal cavity of the valve body through the connecting ports.

[0007] The valve body is fixedly mounted on the outer shell, a motor is fixedly mounted inside the outer shell, a seal is slidably arranged in the cavity, two guide rods arranged at intervals are passed through the seal, the upper end of the guide rod is fixedly connected to the outer shell, a screw is fixedly mounted on the output shaft end of the motor, the screw passes through the seal and is threadedly connected to the seal, an air pressure balancing mechanism is provided on the valve core, a first bevel gear is fixedly mounted on the output shaft of the motor, a rotating shaft is rotatably mounted on the outer shell, the rotating shaft extends into the outer shell, a second bevel gear is fixedly mounted on one end of the rotating shaft, the second bevel gear is meshed with the first bevel gear, and a turntable is fixedly mounted on the other end of the rotating shaft.

[0008] As a further technical solution of the present invention, a heat dissipation slot is provided on the outer shell, and a status indicator light is installed on the outer shell.

[0009] As a further technical solution of the present utility model, the air pressure balancing mechanism includes an inner pipe, which is installed on the valve core and connected to the cavity. A first support plate is fixedly installed in the valve core, and a first movable piece is provided at the port of the inner pipe. A first cross bar is fixedly connected to the first movable piece, and the first cross bar passes through the first support plate. A first spring is sleeved on the first cross bar, and the two ends of the first spring are respectively fixedly connected to the first movable piece and the first support plate.

[0010] As a further technical solution of the present utility model, the air pressure balancing mechanism also includes an external pipe, which is installed on the valve core and connected to the cavity. A second support plate is fixedly installed in the valve core, and a second movable piece is provided at the port of the external pipe. A second cross bar is fixedly connected to the second movable piece, and the second cross bar passes through the second support plate. A second spring is sleeved on the second cross bar, and both ends of the second spring are respectively fixedly connected to the second movable piece and the second support plate.

[0011] As a further technical solution of the present invention, the inner wall of the valve body is sprayed with a corrosion-resistant coating.

[0012] As a further technical solution of the present invention, annular plates are fixedly installed at both ends of the valve body, and a plurality of threaded mounting holes are opened on the annular plates.

[0013] The utility model provides a power station sand flushing valve opening and closing structure, which has the following advantages compared with the existing technology:

[0014] Beneficial effects:

[0015] 1. This design is a power station sand flushing valve opening and closing structure. The motor drives the screw to rotate, so that the seal moves along the direction of the guide rod, so that the seal moves down and blocks the connecting ports on both sides, thereby realizing the opening and closing of the valve. By driving the seal upward, the seal can be moved away from the connecting port and the connecting port is in an open state.

[0016] 2. This design is a power station sand flushing valve opening and closing structure. When the motor fails, the rotating shaft is driven to rotate by rotating the turntable. The second bevel gear at one end of the rotating shaft drives the first bevel gear to rotate. The first bevel gear and the motor output shaft rotate synchronously, thereby manually driving the screw to rotate, so that the seal moves along the direction of the guide rod, preventing the control valve body from being unable to open and close due to motor failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an opening and closing structure of a sand flushing valve in a power station;

[0018] Figure 2 This is a side view of the opening and closing structure of a sand flushing valve in a power station;

[0019] Figure 3 This is a cross-sectional view of the opening and closing structure of a sand flushing valve in a power station;

[0020] Figure 4 A power station sand flushing valve opening and closing structure Figure 3 A magnified schematic diagram of some structures in .

[0021] In the figure: valve body 1, valve core 2, cavity 3, connecting port 4, outer shell 5, motor 6, seal 7, guide rod 8, screw 9, first bevel gear 10, rotating shaft 11, second bevel gear 12, turntable 13, status indicator light 14, inner pipe 15, first support plate 16, first movable piece 17, first cross bar 18, first spring 19, outer pipe 20, second support plate 21, second movable piece 22, second cross bar 23, second spring 24. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-4The utility model provides a technical solution for the opening and closing structure of a sand flushing valve in a power station: an opening and closing structure of a sand flushing valve in a power station, comprising a valve body 1, a valve core 2 being arranged inside the valve body 1, a cavity 3 being arranged inside the valve core 2, connecting ports 4 being opened on both sides of the valve core 2, the connecting ports 4 penetrating the valve core 2, and the cavity 3 being connected with the internal cavity of the valve body 1 through the connecting ports 4.

[0024] An outer shell 5 is fixedly mounted on the valve body 1, a motor 6 is fixedly mounted inside the outer shell 5, a seal 7 is slidably mounted in the cavity 3, two guide rods 8 are inserted through the seal 7, and the upper end of the guide rod 8 is fixedly connected to the outer shell 5. A screw 9 is fixedly mounted on the output shaft end of the motor 6, which passes through the seal 7 and is threadedly connected to the seal 7. A gas pressure balancing mechanism is provided on the valve core 2, a first bevel gear 10 is fixedly mounted on the output shaft of the motor 6, and a rotating shaft 11 is rotatably mounted on the outer shell 5. The rotating shaft 11 extends into the outer shell 5, and a second bevel gear 12 is fixedly mounted on one end of the rotating shaft 11. The second bevel gear 12 meshes with the first bevel gear 10, and a turntable 13 is fixedly mounted on the other end of the rotating shaft 11. A heat dissipation slot is provided on the outer shell 5, and a status indicator light 14 is installed on the outer shell 5.

[0025] Among them, such as Figure 4 As shown, the air pressure balancing mechanism includes an inner pipe 15, which is mounted on the valve core 2 and communicates with the cavity 3. A first support plate 16 is fixedly mounted within the valve core 2. A first movable piece 17 is disposed at the end of the inner pipe 15. A first crossbar 18 is fixedly connected to the first movable piece 17, which passes through the first support plate 16. A first spring 19 is sleeved on the first crossbar 18, with the ends of the first spring 19 respectively fixed to the first movable piece 17 and the first support plate 16. When the valve body 1 is mounted on an external pipeline, fluid enters the valve body 1 from one end, enters the cavity 3 through the connecting port 4 on one side, and is discharged from the connecting port 4 on the other side. Finally, it is discharged from the other end of the valve body 1 and enters the external pipeline. The motor 6 drives the screw 9 to rotate, causing the seal 7 to move along the guide rod 8, thereby moving the seal 7 downward and blocking the connecting ports 4 on both sides, thereby opening and closing the valve. By driving the seal 7 upward, the seal 7 can be removed from the connecting port 4, leaving the connecting port 4 in an open state.

[0026] Among them, such as Figure 4As shown, the air pressure balancing mechanism also includes an external pipe 20, which is mounted on the valve core 2 and communicates with the cavity 3. A second support plate 21 is fixedly mounted within the valve core 2. A second movable piece 22 is disposed at the end of the external pipe 20. A second crossbar 23 is fixedly connected to the second movable piece 22, which extends through the second support plate 21. A second spring 24 is sleeved on the second crossbar 23, with the ends of the second spring 24 respectively fixed to the second movable piece 22 and the second support plate 21. The inner wall of the valve body 1 is spray-coated with a corrosion-resistant coating. An annular piece is fixedly mounted at each end of the valve body 1, and each annular piece has multiple threaded mounting holes. When the seal 7 moves downward, the air pressure in the cavity 3 increases, the second movable piece 22 moves, and the end of the external pipe 20 is opened, thereby balancing the air pressure within the cavity 3. When the seal 7 moves upward, the air pressure in the cavity 3 decreases, and the first movable piece 17 moves under the action of the air pressure, opening the end of the internal pipe 15, allowing external air to enter the cavity 3, thereby balancing the air pressure within the cavity 3.

[0027] The working principle of the present utility model is as follows: the valve body 1 is installed on an external pipeline, and fluid enters from one end of the valve body 1, enters the cavity 3 through the connecting port 4 on one side, and is discharged from the connecting port 4 on the other side. Thereafter, it is discharged from the other end of the valve body 1 and enters the external pipeline. The motor 6 drives the screw 9 to rotate, causing the seal 7 to move along the direction of the guide rod 8, thereby moving the seal 7 downward and blocking the connecting ports 4 on both sides, thereby achieving the opening and closing of the valve. By driving the seal 7 upward, the seal 7 can be moved away from the connecting ports 4 and the connecting ports 4 are placed in an open state. When the motor 6 fails, the rotating shaft 11 is driven to rotate by rotating the turntable 13. The second bevel gear 12 at one end of the rotating shaft 11 drives the first bevel gear 10 to rotate. The first bevel gear 10 and the output shaft of the motor 6 rotate synchronously, thereby manually driving the screw 9 to rotate, causing the seal 7 to move along the direction of the guide rod 8, preventing the opening and closing of the control valve body 1 from being unable to be controlled due to the failure of the motor 6.

[0028] When the sealing member 7 moves downward, the air pressure in the cavity 3 increases, the second movable piece 22 moves and opens the port of the outer pipe 20, which can balance the air pressure in the cavity 3; when the sealing member 7 moves upward, the air pressure in the cavity 3 decreases, the first movable piece 17 moves under the action of the air pressure, the port of the inner pipe 15 opens, and external air can enter the cavity 3, thereby balancing the air pressure in the cavity 3.

[0029] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A power station sand flushing valve opening and closing structure, characterized in that: The valve body (1) comprises a valve core (2) provided in the valve body (1), a cavity (3) provided inside the valve core (2), a communication port (4) provided on both sides of the valve core (2), the communication port (4) passing through the valve core (2), and the cavity (3) communicating with the internal cavity of the valve body (1) through the communication port (4); An outer shell (5) is fixedly mounted on the valve body (1), a motor (6) is fixedly mounted inside the outer shell (5), a sealing member (7) is slidingly arranged in the cavity (3), two guide rods (8) arranged at intervals are passed through the sealing member (7), the upper ends of the guide rods (8) are fixedly connected to the outer shell (5), a screw (9) is fixedly mounted on the output shaft end of the motor (6), the screw (9) passes through the sealing member (7) and is threadedly connected to the sealing member (7), an air pressure balancing mechanism is provided on the valve core (2), a first bevel gear (10) is fixedly mounted on the output shaft of the motor (6), a rotating shaft (11) is rotatably mounted on the outer shell (5), the rotating shaft (11) extends into the outer shell (5), a second bevel gear (12) is fixedly mounted on one end of the rotating shaft (11), the second bevel gear (12) is meshed with the first bevel gear (10), and a rotating disk (13) is fixedly mounted on the other end of the rotating shaft (11).

2. A power station sand flushing valve opening and closing structure according to claim 1, characterized in that: A heat dissipation slot is provided on the outer shell (5), and a status indicator light (14) is installed on the outer shell (5).

3. A power station sand flushing valve opening and closing structure according to claim 2, characterized in that: The air pressure balancing mechanism includes an inner pipe (15), which is installed on the valve core (2) and communicates with the cavity (3). A first support plate (16) is fixedly installed in the valve core (2). A first movable piece (17) is provided at the end of the inner pipe (15). A first cross bar (18) is fixedly connected to the first movable piece (17). The first cross bar (18) passes through the first support plate (16). A first spring (19) is sleeved on the first cross bar (18), and two ends of the first spring (19) are respectively fixedly connected to the first movable piece (17) and the first support plate (16).

4. A power station sand flushing valve opening and closing structure according to claim 3, characterized in that: The air pressure balancing mechanism further comprises an external pipe (20), the external pipe (20) being mounted on the valve core (2) and communicating with the cavity (3), a second support plate (21) being fixedly mounted in the valve core (2), a second movable piece (22) being provided at the end of the external pipe (20), a second cross bar (23) being fixedly connected to the second movable piece (22), the second cross bar (23) passing through the second support plate (21), a second spring (24) being sleeved on the second cross bar (23), and two ends of the second spring (24) being fixedly connected to the second movable piece (22) and the second support plate (21), respectively.

5. A power station sand flushing valve opening and closing structure according to claim 4, characterized in that: The inner wall of the valve body (1) is sprayed with a corrosion-resistant coating.

6. A power station sand flushing valve opening and closing structure according to claim 5, characterized in that: An annular piece is fixedly mounted on both ends of the valve body (1), and a plurality of threaded mounting holes are provided on the annular piece.

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