Power station valve capable of preventing frost crack

Abstract

The utility model discloses a power station valve capable of preventing frost cracking, and relates to the field of power station valves, the power station valve capable of preventing frost cracking comprises an elliptical valve shell, two sides of the elliptical valve shell are connected with connecting pipes, coils are wound at the outer ends of the connecting pipes, an outer protective shell is arranged at the outer end of the elliptical valve shell, and the outer protective shell is connected with the elliptical valve shell. And an outer protective pipe is arranged at the outer end of the connecting pipe. The space between the outer protection shell and the oval valve shell and the space between the outer protection pipe and the connecting pipe are filled with heat preservation and insulation cotton, heat preservation can be conducted on the valve, and therefore the influence of external low temperature on the valve is reduced; and the device is simple in structure, good in heat preservation effect, capable of electrifying the coil when the environment temperature is too low so as to generate heat, good in practicability and capable of effectively preventing the valve from being damaged by the low temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of power station valves, in particular to a power station valve capable of preventing freezing and cracking. Background Art

[0002] Power station valves, also known as power station special valves, are mainly used in the pipelines of various systems in thermal power plants. They play an important role in the water supply system, circulating water system, steam system and liquid medium transportation system of the power station. They are used to control the flow of the medium, adjust the flow and pressure, and protect equipment and systems from damage caused by excessive pressure. Due to the characteristics of the working environment of the power station, these valves also need to withstand high temperature and high pressure.

[0003] However, although existing power station valves can withstand high temperatures and high pressures by their own strength, their antifreeze effect and thermal insulation effect are not ideal. In cold weather, valves and related components are prone to freezing and cracking, which not only causes damage to the valves, but may also cause leakage in the pipeline system, thereby affecting the safe operation of the entire power station.

[0004] In order to solve this technical problem, the utility model proposes a power station valve that can prevent freezing and cracking. Utility Model Content

[0005] The main purpose of the utility model is to provide a power station valve that can prevent freezing and cracking, which can effectively solve the problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A power station valve that can prevent freezing and cracking includes an elliptical valve housing, connecting pipes are connected on both sides of the elliptical valve housing, a coil is wound around the outer end of the connecting pipe, an outer protective shell is provided at the outer end of the elliptical valve housing, an outer protective pipe is provided at the outer end of the connecting pipe, thermal insulation cotton is filled between the outer protective shell and the elliptical valve housing, and between the outer protective pipe and the connecting pipe, deformation strips are provided in the outer protective shell and the outer protective pipe, a relay is provided at the upper end of the outer protective shell, a protective cover is connected to the upper end of the outer protective shell, and a temperature detector is provided at the upper end of the protective cover.

[0008] Preferably, the elliptical valve shell is connected to the connecting pipe, the outer protective shell is connected to the outer protective tube, the thermal insulation cotton has a good thermal insulation effect, the deformation strip can be passively deformed, and it is sealed and connected to the outer protective shell and the outer protective tube.

[0009] Preferably, the coil is conductive, the relay is connected to the coil and the temperature detector respectively through wires, a valve body is slidably connected in the elliptical valve housing, a water stop ring is provided in the elliptical valve housing, and the valve body can be connected to the water stop ring.

[0010] Preferably, the upper end of the valve body is connected to a connecting rod, the upper end of the connecting rod is connected to a threaded rod, the threaded rod is inserted into the protective cover, the upper end of the elliptical valve shell is connected to a fixed tube, and the fixed tube is inserted into the outer protective shell.

[0011] Preferably, the connecting rod is slidably connected in a fixed tube, the upper end of the fixed tube is rotatably connected to a rotating ring, a threaded groove is provided in the rotating ring, and the threaded rod is threadedly connected in the rotating ring.

[0012] Preferably, the outer end of the rotating ring is connected to a worm gear, the protective cover is connected to a servo motor, the driving end of the servo motor is connected to a worm, the worm is engaged with the worm gear, and the worm gear and the worm gear are both located in the protective cover.

[0013] Preferably, a convex strip is connected inside the fixing tube, a groove is provided at the outer end of the connecting rod, the convex strip is located in the groove, and the two are slidably connected.

[0014] Preferably, the connecting tube and the side end of the outer protective tube are connected with a connecting plate, a connecting hole is opened in the connecting plate, and a sealing ring is provided at the side end of the connecting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the utility model, an outer protective shell and an outer protective tube are provided to seal and protect the valve. Thermal insulation cotton is filled between the outer protective shell and the elliptical valve shell, and between the outer protective tube and the connecting tube to insulate the valve, thereby reducing the impact of the low temperature of the external environment on the valve. A coil is wound around the outer end of the connecting tube, and when the temperature detector detects that the current temperature is too low, it will be able to send the signal to the relay. The relay will power the coil through the wire, so that the coil is energized. According to the principle of electromagnetic induction, the connecting tube will be able to generate heat to provide heat for the device, thereby preventing the valve from being damaged or broken due to low temperature. The device has a simple structure and good thermal insulation effect. When the ambient temperature is too low, the coil can be energized to generate heat. It has good practicality and can effectively prevent the valve from being damaged by low temperature.

[0017] In the present invention, deformation strips are provided in the outer protective shell and the outer protective tube. Since the outer protective shell and the outer protective tube will produce a "thermal expansion and contraction" effect due to temperature changes, their volumes will change. At this time, they will be able to interact with the deformation strips, and the deformation strips will be deformed, providing space for the deformation of the two, thereby avoiding the outer protective shell and the outer protective tube from being broken due to "thermal expansion and contraction", thereby effectively improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a power station valve that can prevent freezing and cracking according to the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a power station valve that can prevent freezing and cracking according to the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of an elliptical valve housing of a power station valve that can prevent freezing and cracking according to the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a rotating ring of a power station valve that can prevent freezing and cracking according to the utility model;

[0022] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of a power station valve capable of preventing freezing and cracking.

[0023] In the figure: 1. Elliptical valve housing; 2. Connecting pipe; 3. Coil; 4. Outer protective housing; 5. Outer protective pipe; 6. Thermal insulation cotton; 7. Deformation strip; 8. Relay; 9. Protective cover; 10. Temperature detector; 11. Valve body; 12. Water stop ring; 13. Connecting rod; 14. Threaded rod; 15. Fixed pipe; 16. Rotating ring; 17. Worm gear; 18. Servo motor; 19. Worm; 20. Raised strip; 21. Groove; 22. Connecting plate. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1-5 As shown, a power station valve that can prevent freezing and cracking includes an elliptical valve shell 1, connecting pipes 2 are connected on both sides of the elliptical valve shell 1, the elliptical valve shell 1 is communicated with the connecting pipe 2, and the elliptical valve shell 1 and its internal parts and connecting pipe 2 together constitute the power station valve body, the outer end of the elliptical valve shell 1 is provided with an outer protective shell 4, and the outer end of the connecting pipe 2 is provided with an outer protective pipe 5, the outer protective shell 4 and the outer protective pipe 5 are used to protect the elliptical valve shell 1 and the connecting pipe 2 therein, and thermal insulation cotton 6 is filled between the outer protective shell 4 and the elliptical valve shell 1, and between the outer protective pipe 5 and the connecting pipe 2. The thermal insulation cotton 6 has good thermal insulation effect and can block the external low temperature, thereby reducing the interference of the external low temperature on the valve, and a connecting plate 22 is connected to the side end of the connecting pipe 2 and the outer protective pipe 5, a connecting hole is opened in the connecting plate 22, and a sealing ring is provided at the side end of the connecting plate 22, and the connecting plate 22 is used to connect to the infusion pipeline, and the sealing ring is used to increase the sealing between the connecting plate 22 and the infusion pipeline.

[0026] Deformation strips 7 are provided inside the outer protective shell 4 and the outer protective tube 5. The deformation strips 7 can be compressed and deformed. They are sealed with the outer protective shell 4 and the outer protective tube 5. When the volume of the outer protective shell 4 and the outer protective tube 5 changes due to "thermal expansion and contraction", the deformation strips 7 will be deformed to provide space for the deformation of the two, thereby avoiding the outer protective shell 4 and the outer protective tube 5 from being broken due to "thermal expansion and contraction".

[0027] A protective cover 9 is connected to the upper end of the outer protective shell 4, and a temperature detector 10 is provided on the upper end of the protective cover 9. The temperature detector 10 is used to detect the external temperature. A relay 8 is provided on the upper end of the outer protective shell 4. A coil 3 is wound around the outer end of the connecting tube 2. The coil 3 is conductive. The relay 8 is connected to the coil 3 and the temperature detector 10 through wires. When the temperature detector 10 detects that the external temperature is too low, it will send a signal to the relay 8, and the relay 8 will energize the coil 3, so that according to the principle of electromagnetic induction, the connecting tube 2 can generate heat, thereby actively providing heat for the device.

[0028] A valve body 11 is slidingly connected to the elliptical valve housing 1. A water stop ring 12 is provided in the elliptical valve housing 1. The valve body 11 can be connected to the water stop ring 12, so that sealing can be achieved when the valve is closed. A connecting rod 13 is connected to the upper end of the valve body 11, and a threaded rod 14 is connected to the upper end of the connecting rod 13. The threaded rod 14 is inserted in the protective cover 9. A fixed tube 15 is connected to the upper end of the elliptical valve housing 1, and the fixed tube 15 is inserted in the outer protective shell 4. A convex strip 20 is connected to the fixed tube 15. A groove 21 is provided at the outer end of the connecting rod 13, and the convex strip 20 is located in the groove 21. The two are slidably connected, so that the connecting rod 13 can be constrained so that it cannot rotate and can only be lifted and lowered smoothly in the fixed tube 15. At the same time, the threaded rod 14 can also be constrained so that it cannot rotate.

[0029] The connecting rod 13 is slidably connected in the fixed tube 15, and the upper end of the fixed tube 15 is rotatably connected to the rotating ring 16. A threaded groove is provided in the rotating ring 16, and the threaded rod 14 is threadedly connected in the rotating ring 16. The outer end of the rotating ring 16 is connected to a worm gear 17. A servo motor 18 is connected in the protective cover 9. The driving end of the servo motor 18 is connected to a worm 19. The worm 19 is engaged with the worm gear 17. Starting the servo motor 18 will drive the worm 19 to rotate. The rotation of the worm 19 acts on the worm gear 17, which will drive the rotating ring 16 to rotate. The threaded groove inside the rotating ring 16 will act on the threaded rod 14, and the threaded rod 14 cannot rotate, so that it can move up and down, thereby driving the valve body 11 to move in the elliptical valve housing 1 through the connecting rod 13, thereby realizing the opening and closing of the valve.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A power station valve capable of preventing freezing and cracking, comprising an elliptical valve housing (1), characterized in that: The elliptical valve housing (1) is connected to connecting pipes (2) on both sides, the outer end of the connecting pipe (2) is wound with a coil (3), the outer end of the elliptical valve housing (1) is provided with an outer protective housing (4), the outer end of the connecting pipe (2) is provided with an outer protective pipe (5), the space between the outer protective housing (4) and the elliptical valve housing (1), and between the outer protective pipe (5) and the connecting pipe (2) is filled with thermal insulation cotton (6), the outer protective housing (4) and the outer protective pipe (5) are both provided with deformation strips (7), the upper end of the outer protective housing (4) is provided with a relay (8), the upper end of the outer protective housing (4) is connected to a protective cover (9), and the upper end of the protective cover (9) is provided with a temperature detector (10).

2. A power station valve capable of preventing frost cracking according to claim 1, characterized in that: The elliptical valve housing (1) is in communication with the connecting pipe (2), the outer protective housing (4) is in communication with the outer protective pipe (5), the thermal insulation cotton (6) has a good thermal insulation effect, the deformation strip (7) can be passively deformed, and is sealedly connected to the outer protective housing (4) and the outer protective pipe (5).

3. The power station valve capable of preventing frost cracking according to claim 1, characterized in that: The coil (3) is electrically conductive, the relay (8) is connected to the coil (3) and the temperature detector (10) respectively via wires, a valve body (11) is slidably connected in the elliptical valve housing (1), a water stop ring (12) is provided in the elliptical valve housing (1), and the valve body (11) is connectable to the water stop ring (12).

4. The power station valve capable of preventing frost cracking according to claim 3, characterized in that: The upper end of the valve body (11) is connected to a connecting rod (13), the upper end of the connecting rod (13) is connected to a threaded rod (14), the threaded rod (14) is inserted into the protective cover (9), and the upper end of the elliptical valve housing (1) is connected to a fixed tube (15), and the fixed tube (15) is inserted into the outer protective housing (4).

5. The power station valve capable of preventing frost cracking according to claim 4, characterized in that: The connecting rod (13) is slidably connected in a fixed tube (15); the upper end of the fixed tube (15) is rotatably connected to a rotating ring (16); a threaded groove is provided in the rotating ring (16); and the threaded rod (14) is threadedly connected in the rotating ring (16).

6. The power station valve capable of preventing freezing and cracking according to claim 5, characterized in that: The outer end of the rotating ring (16) is connected to a worm gear (17), the protective cover (9) is connected to a servo motor (18), the driving end of the servo motor (18) is connected to a worm (19), the worm (19) is meshed with the worm gear (17), and the worm gear (17) and the worm gear (19) are both located in the protective cover (9).

7. The power station valve capable of preventing frost cracking according to claim 4, characterized in that: A convex strip (20) is connected inside the fixing tube (15), a groove (21) is provided at the outer end of the connecting rod (13), the convex strip (20) is located in the groove (21), and the two are slidably connected.

8. The power station valve capable of preventing freezing and cracking according to claim 1, characterized in that: The connecting tube (2) and the side end of the outer protective tube (5) are connected with a connecting plate (22), a connecting hole is provided in the connecting plate (22), and a sealing ring is provided at the side end of the connecting plate (22).

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