Anti-freezing self-heating thermal insulation butterfly valve

Abstract

This utility model relates to the field of butterfly valve insulation technology and discloses an antifreeze self-heating insulation butterfly valve. A valve plate is rotatably connected to the inner wall of the valve body, and a valve stem is fixedly connected to one end of the valve plate. A valve stem tube is rotatably connected to the surface of the valve stem. Axially symmetrical connecting flanges are fixedly connected to both ends of the valve body, and an insulation groove is formed between the two symmetrical connecting flanges. An insulation structure is fixedly installed on the inner wall of the insulation groove, and a protective shell is sandwiched on the outer side of the insulation structure. By setting the heat-conducting layer, electric heating tape, and heat insulation layer in the insulation groove set in the valve body, it is not only convenient to add to the existing butterfly valve, but also increases the heat conduction area with the butterfly valve body compared with the existing insulation structure, which greatly improves the insulation effect. In addition, the protective shell is made of elastic alloy plate, which can fix its installation position by elasticity, which is not only convenient to install, but also reduces the processing difficulty of the insulation structure.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve insulation technology, specifically to an antifreeze self-heating insulation butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of pipeline media under pressure. A butterfly valve is a type of valve whose closing element is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] Currently, the commonly used butterfly valve insulation structure is relatively complicated and time-consuming to process, and the heating area is small, which reduces the insulation effect. For example, the antifreeze self-heating insulation butterfly valve disclosed in CN217440893U includes a valve body, a first insulation box, a second insulation box, an insulation plate, and a fixing frame disposed on the outside of the valve body; the fixing frame is used to connect and fix the first insulation box and the second insulation box, and both the first insulation box and the second insulation box are provided with snap-fit ​​grooves for fixing the fixing frame; a hook plate is integrally provided at the end of the first insulation box away from the fixing frame, and a snap hook is integrally provided at the end of the hook plate away from the first insulation box.

[0004] As can be seen from the above-disclosed scheme, the butterfly valve insulation structure is fixed by connecting the hook plate to the hook set at one end of the insulation box to fix the first insulation and the enclosed position of the second insulation box. Then the insulation structure is positioned. Not only is the processing of the insulation box cumbersome and time-consuming, but the heating and insulation area of ​​the butterfly valve is small, which reduces the insulation effect. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an antifreeze self-heating and heat-insulating butterfly valve, which solves the problems of poor heat insulation and troublesome installation of existing butterfly valves.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a freeze-proof self-heating and heat-insulating butterfly valve, comprising a butterfly valve body, the butterfly valve body including a valve body, a valve plate rotatably connected to the inner wall of the valve body, a valve stem fixedly connected to one end of the valve plate, a valve stem tube rotatably connected to the surface of the valve stem, axially symmetrical connecting flanges fixedly connected to both ends of the valve body, and a heat-insulating groove formed between the two symmetrical connecting flanges, a heat-insulating structure fixedly installed on the inner wall of the heat-insulating groove, and a protective shell sandwiched on the outer side of the heat-insulating structure. By setting the heat-conducting layer, electric heating tape, and heat insulation layer in the heat-insulating groove of the valve body, it is not only convenient to add to existing butterfly valves, but also increases the heat-conducting area with the butterfly valve body compared to existing heat-insulating structures, greatly improving the heat-insulating effect. Furthermore, the protective shell is made of elastic alloy plate, which can be fixed in its installation position by elasticity, which is not only convenient to install, but also reduces the processing difficulty of the heat-insulating structure.

[0007] Preferably, the heat preservation structure includes an electric heating tape, which is tightly wound inside the heat preservation tank. A heat-conducting layer is provided between the electric heating tape and the heat preservation tank. The heat-conducting layer is filled and covered with heat-conducting mud. The electric heating tape and the heat-conducting layer can increase the contact area with the inner wall of the heat preservation tank, thereby greatly increasing the heating and heat preservation area of ​​the valve body.

[0008] Preferably, a thermal insulation layer is provided on the outside of the electric heating tape and the heat-conducting layer. The thermal insulation layer is made of glass wool and is movably connected to the inner wall of the protective shell. The thermal insulation layer has the function of heat insulation.

[0009] Preferably, the protective shell is made of an elastic alloy plate. The closed part of the protective shell is provided with a central hole and a side clamping hole. The inner wall of the central hole is movably connected to the surface of the valve stem tube. The protective shell is fixed by elastic clamping, which can protect the outside of the thermal insulation layer.

[0010] Preferably, sealing gaskets are fixedly connected to both sides of the protective shell. The sealing gaskets are made of elastic insulating rubber, and their surfaces are movably connected to the inner wall of the insulation groove. The sealing gaskets can increase the sealing effect on both sides of the protective shell.

[0011] Preferably, the surface of the electric heating tape is electrically connected to an external wire, and the surface of the external wire is movably connected to the inner wall of the side clamping hole. The side clamping hole not only facilitates the lead-out of the external wire, but also ensures the sealing of the connection through clamping force.

[0012] Preferably, an L-shaped anti-slip plate is fixedly connected to the surface of the protective shell. The anti-slip plate can prevent fingers from slipping and facilitate the opening of the protective shell for assembly and disassembly.

[0013] Compared with the prior art, this utility model provides an antifreeze self-heating and heat-insulating butterfly valve, which has the following characteristics:

[0014] Beneficial effects:

[0015] By placing the heat-conducting layer, electric heating tape, and thermal insulation layer inside the insulation groove of the valve body, it is not only convenient to add to existing butterfly valves, but also increases the heat-conducting area with the butterfly valve body compared to the existing insulation structure, greatly improving the insulation effect. In addition, the protective shell is made of elastic alloy plate, which can fix its installation position by elasticity, which is not only convenient to install, but also reduces the processing difficulty of the insulation structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the insulation structure and butterfly valve body installation structure of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of part A;

[0019] Figure 4 yes Figure 3 A schematic diagram of the protective shell structure;

[0020] Figure 5 This is a schematic diagram of the butterfly valve body structure of this utility model.

[0021] In the diagram: 1. Butterfly valve body; 11. Valve body; 12. Valve plate; 13. Valve stem tube; 14. Connecting flange; 15. Insulation groove; 2. Insulation structure; 21. Heat-conducting layer; 22. Electric heating tape; 23. External wire; 24. Insulation layer; 25. Protective shell; 26. Center hole; 27. Side clamping hole; 28. Anti-slip plate; 29. ​​Sealing gasket. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a technical solution: a freeze-proof, self-heating, and heat-insulating butterfly valve, comprising a butterfly valve body 1, which includes a valve body 11. A valve plate 12 is rotatably connected to the inner wall of the valve body 11. A sealing structure is provided between the valve plate 12 and the inner wall of the valve body 11 to prevent poor sealing when the valve plate 12 blocks airflow. A valve stem is fixedly connected to one end of the valve plate 12, and a worm gear is engaged at one end of the valve stem. A rotary motor is provided at one end of the worm gear to drive the valve stem to rotate automatically, thereby controlling the valve plate 12 to open or close the butterfly valve. A valve stem tube 13 is rotatably connected to the surface of the valve stem. A sealed bearing is provided on the inner wall of the valve stem tube 13 to prevent the valve stem from being blocked. The joints are sealed. The two ends of the valve body 11 are fixedly connected to axially symmetrical connecting flanges 14. The surface of the connecting flanges 14 has through holes to facilitate the connection position of the butterfly valve and the pipeline by bolts. The two symmetrical connecting flanges 14 form a heat insulation groove 15. The inner wall of the heat insulation groove 15 is fixedly installed with a heat insulation structure 2. The heat insulation structure 2 can heat and insulate the valve body 11 to prevent the medium inside the butterfly valve from freezing due to low temperature, which would cause the butterfly valve to fail to work properly. A protective shell 25 is sandwiched on the outside of the heat insulation structure 2. The protective shell 25 is used to protect the heat insulation layer 24, the electric heat tracing tape 22 and the heat conduction layer 21.

[0024] The insulation structure 2 includes an electric heating cable 22, which is tightly wrapped inside the insulation tank 15. The electric heating cable 22 is preferably a flexible, self-limiting heating cable 22. A heat-conducting layer 21 is provided between the electric heating cable 22 and the insulation tank 15. The heat-conducting layer 21 is filled and covered with heat-conducting putty. The material of the heat-conducting layer 21 can also be heat-conducting adhesive or heat-conducting metal foil, which can increase the heat conduction effect. The electric heating cable 22 and the heat-conducting layer 21 can increase the contact area with the inner wall of the insulation tank 15, thereby greatly increasing the heating and insulation area of ​​the valve body 11. A heat insulation layer 24 is provided on the outside of the electric heating cable 22 and the heat-conducting layer 21. The heat insulation layer 24 is wrapped with glass wool. The outside of the heat insulation layer 24 is movably connected to the inner wall of the protective shell 25. The heat insulation layer 24 has the function of heat insulation.

[0025] The protective shell 25 is made of elastic alloy plate. The closed portion of the protective shell 25 has a central hole 26 and side clamping holes 27. The inner wall of the central hole 26 is movably connected to the surface of the valve stem tube 13. The central hole 26 serves as a clearance valve. The inner wall of the central hole 26 is clamped to the surface of the valve stem tube 13 by elastic force, thereby sealing the connection. The protective shell 25 is fixed by elastic clamping, protecting the exterior of the thermal insulation layer 24. Sealing gaskets 29 are fixedly connected to both sides of the protective shell 25. The sealing gaskets 29 are made of elastic insulating rubber, and their surfaces are movably connected to the inner wall of the insulation groove 15. The sealing gaskets 29 enhance the sealing effect on both sides of the protective shell 25.

[0026] The surface of the electric heating tape 22 is electrically connected to an external wire 23. One end of the external wire 23 is connected to a power switch, which facilitates the power supply and disconnection of the electric heating tape 22. The surface of the external wire 23 is movably connected to the inner wall of the side clamping hole 27. The side clamping hole 27 not only facilitates the lead-out of the external wire 23, but also ensures the sealing of the connection through clamping force. An L-shaped anti-slip plate 28 is fixedly connected to the surface of the protective shell 25. The anti-slip plate 28 can prevent fingers from slipping and facilitates the opening of the protective shell 25 for installation and removal.

[0027] The working principle of this device is as follows: During installation, first, heat-conducting mud is filled into the insulation groove 15. Then, the electric heating tape 22 is tightly wrapped around the insulation groove 15. Next, heat-conducting mud is covered to form a heat-conducting layer 21. Then, glass wool is wrapped around the insulation groove 15 to form a heat insulation layer 24. Finally, the two anti-slip plates 28 are held by both thumbs and then pried towards both sides of the opening of the protective shell 25 to open the opening. At this time, the protective shell 25 deforms and generates elasticity. Then, the protective shell 25 is put into the insulation groove 15. Then, the hands are released, and the protective shell 25 is reset by the elasticity, thereby closing the opening. At the same time, the inner wall of the central hole 26 is elastically clamped to the surface of the valve stem tube 13, and the inner wall of the side clamping hole 27 is elastically clamped to the surface of the external wire 23. Then, the external wire... Line 23 is connected to an external power switch. After the power is turned on, the electric heating tape 22 is energized and heated. The temperature is evenly conducted to the surface of the valve body 11 through the heat-conducting layer 21, so that the inside of the valve body 11 is heated. At the same time, the heat insulation layer 24 is used for heat preservation to prevent the inside of the valve body 11 from freezing due to low temperature, ensuring that the butterfly valve can be used normally. By setting the heat-conducting layer 21, the electric heating tape 22 and the heat insulation layer 24 in the heat insulation groove 15 set in the valve body 11, it is not only easy to add to the existing butterfly valve, but also increases the heat conduction area with the butterfly valve body 1 compared with the existing heat insulation structure 2, which greatly improves the heat preservation effect. In addition, the protective shell 25 is made of elastic alloy plate, which can fix its installation position by elasticity, which not only makes the installation convenient, but also reduces the processing difficulty of the heat insulation structure 2.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A freeze-proof, self-heating, heat-insulating butterfly valve, comprising a butterfly valve body (1), characterized in that: The butterfly valve body (1) includes a valve body (11), a valve plate (12) is rotatably connected to the inner wall of the valve body (11), a valve stem is fixedly connected to one end of the valve plate (12), a valve stem tube (13) is rotatably connected to the surface of the valve stem, and axially symmetrical connecting flanges (14) are fixedly connected to both ends of the valve body (11), and a heat insulation groove (15) is formed between the two symmetrical connecting flanges (14). A heat insulation structure (2) is fixedly installed on the inner wall of the heat insulation groove (15), and a protective shell (25) is clamped on the outer side of the heat insulation structure (2).

2. The antifreeze self-heating and heat-insulating butterfly valve according to claim 1, characterized in that: The heat preservation structure (2) includes an electric heat tracing cable (22), which is tightly wrapped in the heat preservation tank (15). A heat-conducting layer (21) is provided between the electric heat tracing cable (22) and the heat preservation tank (15), and the heat-conducting layer (21) is filled and covered with heat-conducting mud.

3. The antifreeze self-heating and heat-insulating butterfly valve according to claim 2, characterized in that: The electric heating tape (22) and the heat-conducting layer (21) are provided with a heat insulation layer (24) on the outside. The heat insulation layer (24) is made of glass wool and is movably connected to the inner wall of the protective shell (25).

4. The antifreeze self-heating and heat-insulating butterfly valve according to claim 1, characterized in that: The protective shell (25) is made of an elastic alloy plate. The closed part of the protective shell (25) is provided with a central hole (26) and a side clamping hole (27). The inner wall of the central hole (26) is movably connected to the surface of the valve stem tube (13).

5. The antifreeze self-heating and heat-insulating butterfly valve according to claim 1, characterized in that: The protective shell (25) is fixedly connected to two sides with sealing gaskets (29). The sealing gaskets (29) are made of elastic insulating rubber and the surface of the sealing gaskets (29) is movably connected to the inner wall of the heat insulation groove (15).

6. The antifreeze self-heating and heat-insulating butterfly valve according to claim 2, characterized in that: The surface of the electric heating tape (22) is electrically connected to an external wire (23), and the surface of the external wire (23) is movably connected to the inner wall of the side clamp hole (27).

7. The antifreeze self-heating and heat-insulating butterfly valve according to claim 1, characterized in that: An L-shaped anti-slip plate (28) is fixedly connected to the surface of the protective shell (25).

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