Valve for low-temperature environment

Abstract

According to the valve used in the low-temperature environment, the electric heating wire is wound on the valve, when the temperature of the using environment of the valve is lower than the temperature of water freezing, the temperature sensor transmits a signal to the controller, the controller controls the electric heating wire to be powered on, and the temperature in the installation space rises after the electric heating wire is powered on; by means of the structure, it can be guaranteed that water in the valve cannot be frozen under the condition that the outside air temperature is low, normal use of the valve is guaranteed, it is guaranteed that the valve cannot be frozen to crack, the installation space can be filled with heat preservation filler through seasoning openings formed in the first shell and the second shell, and the service life of the valve is prolonged. And a heating layer is constructed for the valve through the joint work of the heat preservation filler in the mounting space and the electric heating wire, so that the integrity of the valve can be further ensured, and the valve can be continuously used.

Description

Technical Field

[0001] The utility model relates to a valve used in a low-temperature environment and belongs to the technical field of valves. Background Art

[0002] A valve is a device used to control the flow of fluids (such as liquids, gases, steam, etc.). Valves are usually used in pipeline systems to open, close or adjust the flow of fluids. There are many types and uses of valves, including manual valves, automatic valves, safety valves, regulating valves, etc. In real life, when a valve is used in an environment where water can freeze under low temperatures, if the water inside the valve does not circulate, the water inside the valve will freeze in cold climates, which will seriously affect the normal use of the valve. At the same time, the valve may be frozen and cracked, causing the valve to be unable to be used normally. Therefore, the utility model proposes a valve for low temperature environments to solve the above problems. Utility Model Content

[0003] Based on the above background, the purpose of the present utility model is to provide a valve for low temperature environment to solve the problems in the background technology.

[0004] The utility model provides the following technical solutions:

[0005] A valve for low temperature environment, the valve comprises a valve body, a first flange head is arranged on the top of the valve body, a valve cover is connected to the top flange of the first flange head, second flange heads are arranged on both ends of the valve body, a shell is arranged between the first flange head and the second flange head on the outside of the valve body, a certain installation space is provided between the shell and the valve body, a heating wire is wound around the outside of the valve body, the heating wire is located in the installation space, the shell comprises a first shell and a second shell, a packing port is arranged at the upper position of the first shell and the second shell, a cover plate for covering the packing port is detachably connected to the packing port on the first shell and the second shell by bolts, a controller and a temperature sensor are fixedly connected to the outside of the cover plate located at the packing port of the first shell, a packing for heat preservation is arranged in the installation space, the temperature sensor and the heating wire are both controlled by being electrically connected to an external power supply through the controller,

[0006] Preferably, the contact surfaces of the first shell and the second shell are both provided with sealing strips, and the contact surfaces of the second shell and the first shell and the valve body are both provided with sealing rings.

[0007] Preferably, a water passage cavity is provided inside the valve body, two ends of the water passage cavity are connected to the second flange head respectively, a valve flap integrally formed with the valve body is provided in the center of the water passage cavity, and a water passage hole is provided on the valve flap.

[0008] Preferably, a movable cavity is provided on the top of the valve body, the top of the movable cavity passes through the first flange head, the bottom of the movable cavity is connected to the water passage cavity, and the movable cavity is coaxially arranged with the water passage hole.

[0009] Preferably, a mounting groove is provided inside the valve cover, a through hole is provided at the bottom of the mounting groove, the through hole is provided coaxially with the movable cavity and the mounting groove, and a multi-layer sealing gasket is provided in the mounting groove.

[0010] Preferably, a group of fixing blocks are provided on the top of the valve cover extension surface, and the fixing blocks are detachably connected with pull rods, and the pull rods are detachably connected with extrusion blocks, and the bottom of the extrusion blocks extends into the installation groove to squeeze the multi-layer sealing gasket.

[0011] Preferably, a mounting bracket is further provided at the top of the outer extension surface of the valve cover, a threaded rod is threadedly connected to the mounting bracket, a handwheel is detachably connected to the top of the threaded rod, a valve stem is fixedly connected to the bottom of the threaded rod, a valve plug is provided at the bottom of the valve stem, the threaded rod and the valve stem are coaxially arranged with the through hole, and the valve stem passes through the extrusion block and the sealing gasket in sequence from top to bottom and is rotatably connected thereto, and the valve plug can move up and down in the active cavity driven by the threaded rod and the valve stem.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The utility model discloses a valve for low-temperature environment, by winding a heating wire on the valve, when the temperature of the operating environment of the valve is lower than the freezing temperature of water, the temperature sensor transmits a signal to the controller, and the controller controls the heating wire to be energized. When the heating wire is energized, the temperature inside the installation space rises, which can ensure that the water inside the valve will not be frozen when the external temperature is low, ensure the normal use of the valve, and ensure that the valve will not be frozen and cracked; the installation space can be filled with a filler for heat preservation through the seasoning openings opened on the first shell and the second shell, and the heat-insulating filler in the installation space and the heating wire work together to build a heating layer for the valve, which can further ensure the integrity of the valve so that the valve can continue to be used; the seasoning openings on the first shell and the second shell are detachably connected to the cover plate by bolts, which provides a prerequisite for filling the installation space with the heat-insulating filler; and the shell is set as the first shell and the second shell, and the detachable connection method of bolts and nuts is used to ensure the installation of the shell and the winding of the heating wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 It is a schematic diagram of the shell structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the first shell structure of the utility model.

[0019] In the figure: 1. valve body; 2. first flange head; 3. valve cover; 4. second flange head; 5. shell; 51. first shell; 52. second shell; 6. installation space; 7. heating wire; 8. packing port; 9. bolt; 10. cover plate; 11. controller; 12. temperature sensor; 13. packing; 14. sealing strip; 15. sealing ring; 16. water chamber; 17. valve disc; 18. water hole; 19. movable chamber; 20. installation groove; 21. through hole; 22. sealing gasket; 23. fixing block; 24. pull rod; 25. extrusion block; 26. mounting frame; 27. threaded rod; 28. hand wheel; 29. ​​valve stem; 30. valve plug. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the implementation of the utility model is not limited to the following embodiments, and any form of modification and / or change made to the utility model will fall within the protection scope of the utility model.

[0021] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the field. The methods in the following embodiments, unless otherwise specified, are conventional methods in the field. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0022] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may also be implemented by those skilled in the art without these specific details.

[0023] like Figure 1-Figure 4 As shown, a valve for low temperature environment includes a valve body 1, a first flange head 2 is provided on the top of the valve body 1, a valve cover 3 is connected to the top flange of the first flange head 2, second flange heads 4 are provided at both ends of the valve body 1, a shell 5 is provided between the first flange head 2 and the second flange head 4 outside the valve body 1, a certain installation space 6 is provided between the shell 5 and the valve body 1, a heating wire 7 is wound around the outside of the valve body 1, the heating wire 7 is located in the installation space 6, the shell 5 includes a first shell 51 and a second shell 52, a packing port 8 is provided at the upper position of the first shell 51 and the second shell 52, and a first shell 51 and a second shell 52 are provided with a packing port 8 at the upper position. A cover plate 10 for covering the filling port 8 is detachably connected to the filling port 8 on the first shell 51 and the second shell 52 by bolts 9. A controller 11 and a temperature sensor 12 are fixedly connected to the outside of the cover plate 10 located at the filling port 8 of the first shell 51. A filler 13 for heat preservation is provided in the installation space 6. The temperature sensor and the heating wire 7 are both electrically connected to an external power supply through the controller 11 for control. A sealing strip 14 is provided at the contact surface of the first shell 51 and the second shell 52. A sealing ring 15 is provided at the contact surface of the second shell 52 and the first shell 51 and the valve body 1.

[0024] In the above technical solution, by winding the heating wire 7 on the valve, when the operating environment temperature of the valve is lower than the freezing temperature of water, the temperature sensor 12 transmits a signal to the controller 11, and the controller 11 controls the heating wire 7 to be energized. When the heating wire 7 is energized, the temperature inside the installation space 6 rises, which can ensure that the water inside the valve will not be frozen when the external temperature is low, ensure the normal use of the valve, and ensure that the valve will not be frozen and cracked. The seasoning port opened on the first shell 51 and the second shell 52 can be used to fill the installation space 6 with a filler 13 for insulation. The insulation filler 13 in the installation space 6 and the heating wire 7 work together to build a heating layer for the valve, which can further ensure the integrity of the valve so that the valve can continue to be used. The seasoning port on the first shell 51 and the second shell 52 is detachably connected to the cover plate 10 by bolts 9, which provides a prerequisite for filling the insulation filler 13 in the installation space 6. The shell 5 is set as the first shell 51 and the second shell 52, and the installation of the shell 5 and the winding of the heating wire 7 are ensured by using the detachable connection method of bolts 9 and nuts.

[0025] In the utility model, a water passage cavity 16 is provided inside the valve body 1, and two ends of the water passage cavity 16 are respectively connected to the second flange head 4, a valve flap 17 integrally formed with the valve body 1 is provided in the center of the water passage cavity 16, and a water passage hole 18 is provided on the valve flap 17, and an active cavity 19 is provided on the top of the valve body 1, and the top of the active cavity 19 passes through the first flange head 2, and the bottom of the active cavity 19 is connected to the water passage cavity 16, and the active cavity 19 is coaxially arranged with the water passage hole 18, and a mounting groove 20 is provided inside the valve cover 3, and a through hole 21 is provided at the bottom of the mounting groove 20, and the through hole 21 is coaxially arranged with the active cavity 19 and the mounting groove 20, and a multi-layer sealing gasket 22 is provided in the mounting groove 20, and a group of fixing blocks 23 are provided on the top of the outer surface of the valve cover 3, and the fixing blocks A pull rod 24 is detachably connected to 23, and an extrusion block 25 is detachably connected to the pull rod 24. The bottom of the extrusion block 25 extends into the mounting groove 20 to squeeze the multi-layer sealing gasket 22. A mounting frame 26 is also provided on the top of the outer extension surface of the valve cover 3. A threaded rod 27 is threadedly connected to the mounting frame 26. A hand wheel 28 is detachably connected to the top of the threaded rod 27. A valve stem 29 is fixedly connected to the bottom of the threaded rod 27. A valve plug 30 is provided at the bottom of the valve stem 29. The threaded rod 27 and the valve stem 29 are coaxially arranged with the through hole 21, and the valve stem 29 passes through the extrusion block 25 and the sealing gasket 22 from top to bottom in sequence and is rotatably connected thereto. The valve plug 30 can move up and down in the active cavity 19 driven by the threaded rod 27 and the valve stem 29.

[0026] In the above technical scheme, a water passage chamber 16 is provided inside the valve body 1 so that water can flow through the inside of the valve body 1, a valve disc 17 is provided in the water passage chamber 16, and a water passage hole 18 is provided thereon, so that a channel is provided for the passage of water, and an active chamber 19 is provided on the valve body 1 to provide space for the up and down lifting and lowering movement of the valve stem 29 and the valve plug 30, and a mounting groove 20 on the valve cover 3 can be used to place a sealing gasket 22, and an extrusion block 25 is connected to the fixed block 23 by a pull rod 24, so that the position of the extrusion block 25 in the mounting groove 20 can be adjusted by the pull rod 24, so that the sealing gasket 22 can seal the gap between the through hole 21 and the valve stem 29 more tightly, thereby avoiding water seepage in the valve, and a threaded rod 27 is threadedly connected to the mounting frame 26 on the top of the valve cover 3, so that the rotating hand wheel 28 can drive the threaded rod 27 to move up and down, and further drive the valve stem 29 and the valve plug 30 to move up and down in the active chamber 19, so that the valve has an on-off function.

[0027] The working principle of the valve used in low temperature environment of the utility model is:

[0028] During installation, the heating wire 7 is firstly wound around the valve body 1, and then the heating wire 7 is electrically connected to the controller 11, and then the controller 11 is fixed to the cover plate 10, and then the controller 11 together with the cover plate 10 passes through the packing port 8 on the first shell 51, and then the first shell 51 together with the sealing strip 14 and the sealing ring 15 are attached to the valve body 1, and then the second shell 52 is aligned with the sealing strip 14 and the sealing ring 15, and the positions of the first shell 51 and the second shell 52 are adjusted so that the edges of the two are aligned, and then they are fixedly connected to the valve body with bolts 9 and nuts. 1, and then fill the heat-insulating filler 13 into the installation space 6 from the filling ports 8 on the first shell 51 and the second shell 52, and finally cover the cover plate 10, connect the external power supply to complete the installation, when the operating environment temperature of the valve is lower than the freezing temperature of water, the temperature sensor 12 transmits a signal to the controller 11, and the controller 11 controls the electric heating wire 7 to be energized. When the electric heating wire 7 is energized, the temperature inside the installation space 6 rises, which can ensure that the water inside the valve will not be frozen when the external temperature is low, ensure the normal use of the valve, and ensure that the valve will not be frozen and cracked.

[0029] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A valve for use in a low temperature environment, characterized in that: The valve comprises a valve body (1), the top of the valve body (1) is provided with a first flange head (2), the top of the first flange head (2) is flange-connected to a valve cover (3), both ends of the valve body (1) are provided with second flange heads (4), a shell (5) is provided between the first flange head (2) and the second flange head (4) outside the valve body (1), a certain installation space (6) is provided between the shell (5) and the valve body (1), a heating wire (7) is wound around the outside of the valve body (1), the heating wire (7) is located in the installation space (6), and the shell (5) comprises a first shell (51) and a second shell (52). ), a filling port (8) is provided at the upper position of the first shell (51) and the second shell (52), and a cover plate (10) for covering the filling port (8) is detachably connected to the filling port (8) on the first shell (51) and the second shell (52) through bolts (9), and a controller (11) and a temperature sensor (12) are fixedly connected to the outside of the cover plate (10) located at the filling port (8) of the first shell (51), and a filling material (13) for heat preservation is provided in the installation space (6), and the temperature sensor and the heating wire (7) are both electrically connected to an external power supply through the controller (11) for control.

2. A valve for low temperature environment according to claim 1, characterized in that: The contact surfaces of the first shell (51) and the second shell (52) are both provided with sealing strips (14), and the contact surfaces of the second shell (52) and the first shell (51) with the valve body (1) are both provided with sealing rings (15).

3. A valve for low temperature environment according to claim 1, characterized in that: A water passage chamber (16) is provided inside the valve body (1), and two ends of the water passage chamber (16) are connected to the second flange head (4) respectively. A valve flap (17) formed integrally with the valve body (1) is provided in the center of the water passage chamber (16), and a water passage hole (18) is provided on the valve flap (17).

4. A valve for low temperature environment according to claim 3, characterized in that: The top of the valve body (1) is provided with an active cavity (19), the top of the active cavity (19) passes through the first flange head (2), the bottom of the active cavity (19) is connected to the water passage cavity (16), and the active cavity (19) and the water passage hole (18) are coaxially arranged.

5. A valve for low temperature environment according to claim 4, characterized in that: The valve cover (3) is provided with a mounting groove (20) inside, a through hole (21) is provided at the bottom of the mounting groove (20), the through hole (21) is provided coaxially with the movable cavity (19) and the mounting groove (20), and a multi-layer sealing gasket (22) is provided in the mounting groove (20).

6. A valve for low temperature environment according to claim 5, characterized in that: A group of fixing blocks (23) are provided on the top of the outer extension surface of the valve cover (3), and the fixing blocks (23) are detachably connected with pull rods (24), and the pull rods (24) are detachably connected with extrusion blocks (25), and the bottom of the extrusion blocks (25) extends into the installation groove (20) to exert an extrusion effect on the multi-layer sealing gasket (22).

7. A valve for low temperature environment according to claim 6, characterized in that: A mounting frame (26) is also provided at the top of the outer extension surface of the valve cover (3), and a threaded rod (27) is threadedly connected to the mounting frame (26). A hand wheel (28) is detachably connected to the top of the threaded rod (27), and a valve stem (29) is fixedly connected to the bottom of the threaded rod (27). A valve plug (30) is provided at the bottom of the valve stem (29). The threaded rod (27) and the valve stem (29) are coaxially arranged with the through hole (21), and the valve stem (29) passes through the extrusion block (25) and the sealing gasket (22) in sequence from top to bottom and is rotatably connected thereto. The valve plug (30) can move up and down in the movable chamber (19) driven by the threaded rod (27) and the valve stem (29).

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