Heating device for valve body, valve body assembly and air separation device

Abstract

The utility model provides a heating device for a valve body, a valve body assembly and an air separation device, and relates to the technical field of valve heating and heat preservation, the heating device comprises a framework and a heating body, the framework comprises two sub-frameworks which are detachably connected, the two sub-frameworks jointly define a containing cavity, each sub-framework is provided with a plurality of hollowed-out structures, and the heating body is arranged in the containing cavity. The accommodating cavity is used for accommodating the valve body; the heating body is arranged on the framework, and the heat radiation surface of the heating body covers the peripheral wall of the framework. By arranging the framework and then arranging the heating body on the framework, the heating body is fixed to the valve body, compared with the mode that the heating body is directly fixed to the smooth outer wall face of the valve body, the arrangement of the framework can provide a physical limiting position for fixing of the heating body, and therefore the heating body is easier and more convenient to fix relative to the valve body; and the fixing reliability of the heating body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve heating and heat preservation, and in particular to a heating device for a valve body, a valve body assembly and an air separation device. BACKGROUND

[0002] Whether it is a pneumatic valve body, an electric valve body or a hydraulic valve body, when the valve body is operated in winter or during a period of low ambient temperature, the lubricating grease in the valve body is prone to solidification in a low-temperature environment, and the valve body is prone to deformation in the case of large diurnal temperature difference, thereby causing piston jamming in the valve body and poor operation of the valve body.

[0003] In related technologies, an electric heat tracing is additionally provided outside the valve body, a heating body, for example, an electric heat tracing tape, is wound around the outer peripheral wall of the valve body, and an aluminum foil tape is used for fixation. In winter or during a period of low ambient temperature, the heating body is turned on to heat the valve body, thereby preventing the solidification of the lubricating grease in the valve body and making the temperature contacted by the valve body consistent day and night.

[0004] However, in related technologies, the direct winding and sticking of the heating body have the technical problems of difficulty in fixing the heating body on the outer peripheral wall of the valve body and unreliable fixation. Content of the utility model

[0005] The present application provides a heating device for a valve body, a valve body assembly and an air separation device, aiming to solve the technical problems of difficulty in fixing the heating body on the outer peripheral wall of the valve body and unreliable fixation, so as to make the heating body more easily fixed on the valve body and improve the fixation reliability of the heating body.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The first aspect of the embodiment of the present application provides a heating device for a valve body, comprising:

[0008] The framework comprises two sub-frameworks which are detachably connected, the two sub-frameworks jointly form a containing cavity, and each of the sub-frameworks has a plurality of hollow structures, and the containing cavity is used for containing the valve body;

[0009] The heating body is arranged on the framework, and the heat radiation surface of the heating body covers the peripheral wall of the framework.

[0010] In some embodiments, one of the two sub-frameworks has a first threaded connection part, the other has a second threaded connection part, and the heating device further comprises a first fastener, when the two sub-frameworks are connected, the first threaded connection part and the second threaded connection part are threadedly connected by the first fastener; or,

[0011] One of the two sub-frames has a first magnetic attraction portion, and the other has a second magnetic attraction portion. When the two sub-frames are connected, the first magnetic attraction portion and the second magnetic attraction portion are magnetically connected; or...

[0012] One of the two sub-frames has a first snap-fit ​​portion and the other has a second snap-fit ​​portion. When the two sub-frames are connected, the first snap-fit ​​portion snaps into the second snap-fit ​​portion.

[0013] In some embodiments, each of the sub-frames includes a plurality of first metal purlins and a plurality of second metal purlins. The plurality of first metal purlins are spaced apart along the axial direction of the valve body, and the shape of each first metal purlin matches the shape of the outer peripheral wall of the valve body. The plurality of second metal purlins are spaced apart along the circumferential direction of the valve body, so that the plurality of first metal purlins and the plurality of second metal purlins are crisscrossed and interconnected to form a plurality of the hollow structures.

[0014] In some embodiments, each of the second metal purlins has a gap between it and the outer peripheral wall of the valve body.

[0015] In some embodiments, the heating element is laid on the outer periphery of the frame by bending and coiling multiple times along at least a portion of the second metal purlin in each of the sub-frames.

[0016] In some embodiments, the heating device further includes a plurality of second fasteners, and the heating element and the second metal purlin are fixedly connected by the second fasteners.

[0017] In some embodiments, the heating device further includes a thermal insulation layer surrounding the outer periphery of the frame; and / or,

[0018] The heating device further includes a temperature detection element and a control unit. The temperature detection element is configured to detect the temperature of the accommodating cavity, and the control unit is fixed on the side of the frame away from the valve body. Both the temperature detection element and the heating element are electrically connected to the control unit.

[0019] In some embodiments, when the heating device includes a heat-insulating protective layer surrounding the outer periphery of the frame, the bottom of the heat-insulating protective layer has a drain outlet that communicates with the receiving cavity.

[0020] The heating device in this embodiment fixes the heating element to the valve body by setting a frame and then placing the heating element on the frame. Compared to directly fixing the heating element to the smooth outer wall of the valve body, the frame provides a physical limiting position for fixing the heating element, making it easier and more convenient to fix the heating element relative to the valve body, thereby improving the reliability of the heating element's fixation. Furthermore, the frame consists of two detachably connected sub-frames, making the installation and removal of the frame and the heating element set on the frame relative to the valve body more convenient and quick, and also facilitating subsequent maintenance of the heating element and the frame. In addition, the sub-frames have multiple hollow structures, allowing the heating element to directly radiate heat to the valve body through thermal radiation, thereby improving the heat transfer efficiency from the heating element to the valve body.

[0021] A second aspect of this application provides a valve body assembly, including a valve body and a heating device as described in any of the above embodiments.

[0022] The valve body assembly provided in this application embodiment has the same beneficial effects as the heating device for the valve body provided in the above embodiment, and will not be repeated here.

[0023] A third aspect of this application provides an air separation device, including a valve body assembly as described in the above embodiments.

[0024] The air separation device provided in this application embodiment has the same beneficial effects as the heating device for valve body provided in the above embodiment, and will not be described again here.

[0025] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems solved by the heating device for valve body, valve body assembly, and air separation device provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 An exploded view of the valve body assembly provided for the implementation of this application;

[0028] Figure 2A schematic diagram of the structure of a heating device provided in an embodiment of this application;

[0029] Figure 3 A schematic diagram of an unfolded structure of the heating device provided in an embodiment of this application;

[0030] Figure 4 for Figure 2 A magnified view of a section at point A in the middle;

[0031] Figure 5 for Figure 2 A magnified view of a section at point B.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10 - Heating device; 20 - Valve body assembly;

[0034] 100-Skeleton;

[0035] 101-Sub-skeleton; 102-Accommodation cavity;

[0036] 1011 - Hollowed-out structure; 1012 - First threaded connection part; 1013 - Second threaded connection part;

[0037] 1014 - First metal purlin; 1015 - Second metal purlin; 1016 - Gap;

[0038] 110 - Heating element;

[0039] 120 - Second fastener;

[0040] 130 - Temperature sensing element; 140 - Control unit;

[0041] 200 - Valve body. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0043] This application uses a three-bar butterfly valve in the molecular sieve adsorption system of an air separation unit as an example for explanation. In the molecular sieve adsorption system of an air separation unit, a programmable switching valve is required to control the flow direction, flow pressure, and switching cycle of gas in the molecular sieve adsorption tower. This programmable switching valve is a three-bar butterfly valve. When the three-bar butterfly valve operates in winter or during periods of low ambient temperature, the lubricating grease in the valve is prone to solidification at low temperatures. Furthermore, the valve body is prone to deformation under large day-night temperature differences, leading to piston jamming within the valve body and malfunction of the three-bar butterfly valve, thus affecting the normal operation of the air separation unit.

[0044] In some embodiments, by providing steam or electric heat tracing to the outer peripheral wall of the three-bar butterfly valve body, heat is supplied to the three-bar butterfly valve, keeping the grease in the three-bar butterfly valve in a liquid state, and overcoming the problem of large temperature differences between day and night, thereby preventing deformation of the cylinder of the three-bar butterfly valve.

[0045] Steam tracing heats the three-bar butterfly valve by wrapping a pipe carrying hot steam around the outer wall of the valve body. However, the temperature of the hot steam in the steam pipe is provided by the steam heating station and cannot be adjusted in real time.

[0046] Electric heat tracing involves wrapping a heating element, such as an electric heating tape, around the outer wall of a three-bar butterfly valve and securing it with aluminum foil tape. While electric heat tracing allows for temperature control, the method of directly wrapping and bonding the heating element presents technical problems, such as difficulty in securing the heating element to the outer wall of the valve body and unreliable fixation.

[0047] To address the technical problems described in the above embodiments, this application provides a heating device for a valve body, a valve body assembly, and an air separation device.

[0048] The air separation device includes a valve body assembly 20, which, for example, is a three-bar butterfly valve assembly. Further, as... Figure 1 As shown, the valve body assembly 20 includes a valve body 200 and a heating device 10. The heating device 10 is used to heat the valve body 200 to prevent the grease in the valve body 200 from solidifying and the valve body 200 from deforming in low-temperature environments. Of course, the embodiments of this application are also applicable to other valve bodies 200 that need to operate in low-temperature environments, such as gate valves, slide gate valves, globe valves, ball valves, etc.

[0049] The heating device for the valve body in the embodiments of this application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0050] like Figure 1 andFigure 2 As shown, the heating device 10 includes a frame 100 and a heating element 110.

[0051] The frame 100 includes two detachably connected sub-frames 101, which together form a receiving cavity 102 for accommodating the valve body 200. Thus, the frame 100 can be disassembled and assembled on the valve body 200 by disassembling and connecting the two sub-frames 101, making the operation more convenient and faster, and facilitating the maintenance and repair of the frame 100.

[0052] Furthermore, the heating element 110 is disposed on the frame 100, and the heat radiation surface of the heating element 110 covers the peripheral wall of the frame 100, so that the heat emitted by the heating element 110 can heat the entire valve body 200, thereby preventing the solidification of the lubricating grease inside the valve body 200 and the deformation of the valve body 200 in a low-temperature environment.

[0053] Furthermore, each sub-frame 101 has multiple hollow structures 1011, thereby forming an air layer at the hollow structure 1011. The heating element 110 heats the valve body 200 through the air layer by means of thermal radiation, so as to reduce the heating thermal resistance and thereby improve the heat transfer efficiency from the heating element 110 to the valve body 200.

[0054] For example, two sub-skeletons 101 are prepared by an integral molding process, such as extrusion molding or stamping, and the hollow structure 1011 on them is made simultaneously during the preparation of the skeleton 100.

[0055] For example, the heating element 110 can be an electric heating tape, an electric heating wire, or an electric heating tube, etc.

[0056] In this embodiment of the heating device 10, the heating element 110 is fixed to the valve body 200 by setting a frame 100 and then placing the heating element 110 on the frame 100. Compared with directly fixing the heating element 110 to the smooth outer wall of the valve body 200, the frame 100 provides a physical limiting position for fixing the heating element 110, making it easier and more convenient to fix the heating element 110 relative to the valve body 200, thereby improving the reliability of the fixing of the heating element 110; and the frame The frame 100 consists of two detachably connected sub-frames 101, which makes the installation and removal of the frame 100 and the heating element 110 mounted on the frame 100 relative to the valve body 200 more convenient and quick, and also facilitates the later maintenance of the heating element 110 and the frame 100. In addition, the sub-frame 101 is provided with multiple hollow structures 1011, which allows the heating element 110 to directly radiate heat to the valve body 200 through thermal radiation, thereby improving the heat transfer efficiency from the heating element 110 to the valve body 200.

[0057] Furthermore, the two sub-frames 101 are detachably connected as follows:

[0058] An example, such as Figure 1 and Figure 2 As shown, one of the two sub-frames 101 has a first threaded connection portion 1012 and the other has a second threaded connection portion 1013. The heating device 10 also includes a first fastener. When the two sub-frames 101 are connected, the first threaded connection portion 1012 and the second threaded connection portion 1013 are threadedly connected by the first fastener. This arrangement improves the connection strength and stability between the two sub-frames 101, thereby improving the reliability of the heating element 110 mounted on the frame 100 relative to the valve body 200.

[0059] Specifically, one of the two sub-frames 101 has a first threaded connection portion 1012 at both ends, and the other has a second connection portion at both ends. Both the first and second connection portions include multiple flanges connected to the sub-frame 101. The flanges have threaded holes or through holes. The first fastener is a bolt and nut. When the two sub-frames 101 need to be installed on the valve body 200, the bolts are passed through the threaded holes or through holes on the corresponding flanges of the first and second connection portions, and then tightened with nuts.

[0060] For example, one of the two sub-frames 101 has a first magnetic attraction part and the other has a second magnetic attraction part. When the two sub-frames 101 are connected, the first magnetic attraction part and the second magnetic attraction part are magnetically connected. The arrangement of the first magnetic attraction part and the second magnetic attraction part makes the disassembly and installation of the two sub-frames 101 faster and more convenient, thereby realizing the rapid disassembly and assembly of the heating element 110 set on the frame 100 relative to the valve body 200, and improving the disassembly and assembly efficiency of the heating device 10.

[0061] Specifically, one of the two sub-frames 101 has a first magnetic attraction part at both ends, and the other has a second magnetic attraction part at both ends. Both the first and second magnetic attraction parts include multiple permanent magnets. When the two sub-frames 101 need to be installed on the valve body 200, the corresponding permanent magnets on the first and second magnetic attraction parts are magnetically connected.

[0062] Three examples are provided, one of the two sub-frames 101 has a first snap-fit ​​portion and the other has a second snap-fit ​​portion. When the two sub-frames 101 are connected, the first snap-fit ​​portion snaps into the second snap-fit ​​portion. The arrangement of the first snap-fit ​​portion and the second snap-fit ​​portion makes the disassembly and installation of the two sub-frames 101 more stable and reliable, thereby improving the reliability of the fixing of the heating element 110 on the frame 100 relative to the valve body 200.

[0063] Specifically, one of the two sub-frames 101 has a first snap-fit ​​portion at both ends, and the other has a second snap-fit ​​portion at both ends. The first snap-fit ​​portion has one of multiple buckles or multiple slots, and the second snap-fit ​​portion has another of multiple buckles or multiple slots. The buckles and slots match. When the two sub-frames 101 need to be installed on the valve body 200, the corresponding buckles and slots on the first and second snap-fit ​​portions can be snapped together.

[0064] In addition, in some specific embodiments, such as Figure 2 and Figure 3 As shown, each sub-frame 101 includes a plurality of first metal purlins 1014 and a plurality of second metal purlins 1015. The plurality of first metal purlins 1014 are spaced apart along the axial direction of the valve body 200, and the shape of each first metal purlin 1014 matches the shape of the outer peripheral wall of the valve body 200. The plurality of second metal purlins 1015 are spaced apart along the circumferential direction of the valve body 200, so that the plurality of first metal purlins 1014 and the plurality of second metal purlins 1015 are crisscrossed and interconnected to form a plurality of hollow structures 1011.

[0065] The arrangement of multiple first metal purlins 1014 and multiple second metal purlins 1015 in each sub-frame 101 allows the heating element 110 to transfer heat to the valve body 200 through the hollow structure 1011 via thermal radiation, and also through the first metal purlins 1014 and second metal purlins 1015 via thermal conduction. This ensures that the entire outer wall surface of the valve body 200 can receive heat from the heating element 110, thereby improving the heating reliability of the heating device 10 on the valve body 200.

[0066] For example, the first metal purlin 1014 and the second metal purlin 1015 can be made of aluminum, copper, stainless steel, etc. Specifically, the first metal purlin 1014 and the second metal purlin 1015 are aluminum purlins, which are inexpensive and have high thermal conductivity.

[0067] In some embodiments, the first metal purlin 1014 and the second metal purlin 1015 are fixedly connected, and the fixed connection method is welding, bonding, bolt and nut connection, snap-fit, etc.

[0068] Furthermore, the distance between two adjacent first metal purlins 1014 and between two adjacent second metal purlins 1015 can both be in the range of 50~150mm, which can be selected according to the size of the valve body 200. When the size of the valve body 200 is larger, the distance between two adjacent first metal purlins 1014 and between two adjacent second metal purlins 1015 can be larger. For example, the distance between two adjacent first metal purlins 1014 and between two adjacent second metal purlins 1015 is 50mm, 80mm, 100mm, 120mm, 150mm, etc.

[0069] Specifically, the spacing between two adjacent first metal purlins 1014 and between two adjacent second purlins is taken to be the same value, so that the thermal resistance distribution between the heating element 110 and the valve body 200 is uniform, thereby making the heat transferred from the heating element 110 to the valve body 200 uniform, thus improving the heating uniformity of the heating device 10.

[0070] In addition, combined Figure 2 and Figure 4 As shown, there is a gap 1016 between each of the second metal purlins 1015 and the outer peripheral wall of the valve body 200, thereby forming a fluid channel between two adjacent first metal purlins 1014. This allows condensate generated by the temperature difference between the valve body 200 and the external environment to flow downward along the outer wall of the valve body 200 without being blocked by the transverse metal purlins, i.e., the second metal purlins 1015, under the action of gravity and the guiding effect of the fluid channel. This avoids the accumulation of condensate at the hollow structure 1011, thereby avoiding prolonged contact between condensate and the outer wall of the valve body 200, and preventing the valve body 200 from rusting due to condensate.

[0071] As an example, by overlapping multiple second metal purlins 1015 on the side of multiple first metal purlins 1014 away from the receiving cavity 102, a gap 1016 is formed between the second metal purlins 1015 and the outer peripheral wall of the valve body 200, and a fluid channel is formed between two adjacent first metal purlins 1014.

[0072] Two examples, such as Figure 4 As shown, multiple first metal purlins 1014 and multiple second metal purlins 1015 are arranged in a cross configuration. The end faces of each first metal purlin 1014 and each second metal purlin 1015 facing away from the receiving cavity 102 are flush. The thickness of each second metal purlin 1015 is less than the thickness of each first metal purlin 1014, thereby forming a gap 1016 between the second metal purlin 1015 and the outer peripheral wall of the valve body 200, and forming a fluid channel between two adjacent first metal purlins 1014. This configuration reduces the thickness of the hollow structure 1011, reduces thermal resistance, and improves heat transfer efficiency, thereby improving the heating reliability of the heating device 10.

[0073] Specifically, the thickness of the first metal purlin 1014 ranges from 5 to 15 mm, for example, the thickness of the first metal purlin 1014 is 5 mm, 8 mm, 10 mm, 12 mm, 15 mm, etc.; the thickness of the second metal purlin 1015 ranges from 0.5 to 3 mm, for example, the thickness of the second metal purlin 1015 is 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0074] Furthermore, the width of the first metal purlin 1014 ranges from 1 to 3 mm, for example, the width of the first metal purlin 1014 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.; the width of the second metal purlin 1015 ranges from 5 to 15 mm, for example, the width of the second metal purlin 1015 is 5 mm, 8 mm, 10 mm, 12 mm, 15 mm, etc.

[0075] It should be noted that the shape of each first metal purlin 1014 matches the shape of the outer peripheral wall of the valve body 200, so that the first metal purlin 1014 is in close contact with the outer peripheral wall of the valve body 200. This allows the frame 100 to be supported on the valve body 200 by multiple first metal purlins 1014, thereby avoiding stress concentration on the valve body 200 and making the stress on the valve body 200 more dispersed and uniform. In addition, this arrangement makes the heat distribution more uniform during the partial heat transfer between the heating element 110 and the valve body 200 through heat conduction, thereby making the heating of the valve body 200 more uniform and improving the heating uniformity and reliability of the heating device 10.

[0076] In addition, in some embodiments, the heating element 110 may also be laid on the outer periphery of the frame 100 by bending and coiling multiple times along at least a portion of the first metal purlin 1014 in each sub-frame 101, so that the valve body 200 is heated by heat radiation through the hollow structure 1011, and the valve body 200 is also heated by heat conduction through the first metal purlin 1014.

[0077] In other embodiments, such as Figure 2 and Figure 3As shown, the heating element 110 is laid on the outer periphery of the frame 100 after being bent and coiled multiple times along at least a portion of the second metal purlins 1015 in each sub-frame 101. The heating element 110 is bent and coiled multiple times along the multiple second metal purlins 1015 to control the heating density of the heating element 110. The heating element 110 is positioned on the outer periphery of the frame 100 to avoid direct contact with the valve body 200 when it is positioned inside the frame 100, thus preventing heat concentration on the valve body 200. This allows the heating element 110 to evenly cover the valve body 200 with heat through thermal radiation via the perforated structure 1011 and the first metal purlins 1014, further improving the heating uniformity and reliability of the heating device 10.

[0078] Furthermore, the heating element 110 is arranged along the second metal purlin 1015. Compared with the arrangement along the first metal purlin 1014, this avoids the heat of the heating element 110 being directly conducted to the valve body 200 through the metal purlin, thereby avoiding the concentration of heat at the contact position between the first metal purlin 1014 and the valve body 200, thus improving the heating uniformity and reliability of the heating device 10.

[0079] For example, such as Figure 2 and Figure 3 As shown, the heating element 110 is bent and coiled multiple times along multiple second metal purlins 1015 to form an “S”-shaped extension path.

[0080] Furthermore, such as Figure 5 As shown, the heating device 10 also includes a plurality of second fasteners 120, and the heating body 110 and the second metal purlin 1015 are fixedly connected by the second fasteners 120, thereby further improving the fixing reliability of the heating body 110.

[0081] For example, the second fastener 120 is a metal buckle or metal cable tie, etc., and the spacing between two adjacent second fasteners 120 is 100~300mm. For example, the spacing between two adjacent second fasteners 120 is 100mm, 150mm, 200mm, 250mm, 300mm, etc. Furthermore, the second fastener 120 is disposed at the connection position of the first metal purlin 1014 and the second metal purlin 1015, and multiple second fasteners 120 can be disposed at the same connection position.

[0082] In addition, such as Figure 2 and Figure 3As shown, the heating device 10 also includes a temperature detection element 130 and a control unit 140. The temperature detection element 130 is configured to detect the temperature of the accommodating cavity 102. The control unit 140 is fixed on the side of the frame 100 away from the valve body 200. The temperature detection element 130 and the heating element 110 are both electrically connected to the control unit 140 so that the heating temperature of the heating element 110 can be controlled by the control unit 140 according to the temperature feedback received by the accommodating cavity 102, i.e., the valve body 200, to adjust the heating temperature under different temperature environments and improve the environmental adaptability of the heating device 10.

[0083] Both the temperature sensing element 130 and the control unit 140 are fixedly connected to the frame 100. The fixed connection methods include, but are not limited to, adhesive bonding, snap-fit ​​connection, and strap connection. A heat insulation layer is provided between the frame 100 and the control unit 140; exemplarily, the heat insulation layer is composed of heat-insulating rock wool or heat-insulating aerogel. The placement of the temperature sensing element 130 and the control unit 140 on the frame 100 reduces the length of the connecting cable between the temperature sensing element 130, the heating element 110, and the control unit 140, and allows for on-site monitoring and modification of the heating degree of the heating element 110, thereby improving the convenience of monitoring the heating element 110.

[0084] For example, the temperature sensing element 130 can be a thermocouple, a resistance temperature detector (RTD), an infrared temperature sensor, a fiber optic temperature sensor, etc.

[0085] In some embodiments, the control unit 140 includes a controller, a signal processor, an actuator, etc. The heating power of the heating element 110 and the temperature value detected by the temperature detection element 130 are first transmitted to the signal processor to convert the digital signal into an electrical signal. The electrical signal is then transmitted to the controller, which issues a control command based on the target temperature set in advance. The control command is then transmitted to the actuator to control the heating element 110 to increase or decrease its heating power.

[0086] Furthermore, a junction box is provided between the heating element 110 and the control unit 140 to electrically connect the signal output cable of the control unit 140 to the heating element 110. The tail end of the heating element 110 also has a tail end junction box to protect the tail end of the heating element 110, prevent external condensate from contacting the heat source in the heating element 110, and protect the heating element 110 to avoid mechanical damage to the tail end of the heating element 110.

[0087] In addition, the heating device 10 also includes a thermal insulation layer, which surrounds the outer periphery of the frame 100 to increase the thermal resistance between the heating element 110 and the surrounding environment, reduce the ineffective heat loss of the heating element 110, improve the heating efficiency of the heating device 10, and thus improve the heating reliability of the heating device 10. Furthermore, the frame 100 improves the fixing strength of the thermal insulation layer, thereby increasing the service life and thermal insulation reliability of the thermal insulation layer.

[0088] For example, the thermal insulation and protective layer includes an insulation layer and a protective layer. The protective layer is disposed on the outer peripheral wall of the insulation layer. The insulation layer can be made of insulating rock wool, glass wool or aluminum silicate wool, etc., and the protective layer can be made of galvanized iron sheet.

[0089] Furthermore, the bottom of the thermal insulation layer has a drain outlet, which is connected to the accommodating cavity 102. This allows condensate flowing through the gap 1016 between each of the second metal purlins 1015 and the outer peripheral wall of the valve body 200 to the bottom of the thermal insulation layer to be discharged from the drain outlet. Of course, during non-drainage periods, a drain plug can be installed at the drain outlet to close it. When there is a need for drainage, the drain plug can be opened to discharge the condensate.

[0090] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not all embodiments necessarily include that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0091] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "one" can be understood to convey either singular or plural usage.

[0092] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0093] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heating device for a valve body, characterized in that, include: The frame (100) includes two detachably connected sub-frames (101), the two sub-frames (101) together enclose a receiving cavity (102), and each sub-frame (101) has a plurality of hollow structures (1011), the receiving cavity (102) is used to receive the valve body (200). A heating element (110) is disposed on the frame (100), and the heat radiation surface of the heating element (110) covers the peripheral wall of the frame (100).

2. The heating device according to claim 1, characterized in that, One of the two sub-frames (101) has a first threaded connection portion (1012), and the other has a second threaded connection portion (1013). The heating device (10) also includes a first fastener. When the two sub-frames (101) are connected, the first threaded connection portion (1012) and the second threaded connection portion (1013) are threadedly connected by the first fastener; or, One of the two sub-frames (101) has a first magnetic attraction part, and the other has a second magnetic attraction part. When the two sub-frames (101) are connected, the first magnetic attraction part and the second magnetic attraction part are magnetically connected; or, One of the two sub-frames (101) has a first snap-fit ​​portion and the other has a second snap-fit ​​portion. When the two sub-frames (101) are connected, the first snap-fit ​​portion snaps into the second snap-fit ​​portion.

3. The heating device according to claim 2, characterized in that, Each of the sub-frames (101) includes a plurality of first metal purlins (1014) and a plurality of second metal purlins (1015). The plurality of first metal purlins (1014) are spaced apart along the axial direction of the valve body (200), and the shape of each first metal purlin (1014) matches the shape of the outer peripheral wall of the valve body (200). The plurality of second metal purlins (1015) are spaced apart along the circumferential direction of the valve body (200), so that the plurality of first metal purlins (1014) and the plurality of second metal purlins (1015) are interwoven and connected to each other to form a plurality of hollow structures (1011).

4. The heating device according to claim 3, characterized in that, Each of the second metal purlins (1015) has a gap (1016) between it and the outer peripheral wall of the valve body (200).

5. The heating device according to claim 4, characterized in that, The heating element (110) is laid on the outer periphery of the frame (100) after being bent and coiled multiple times along at least a portion of the second metal purlin (1015) in each of the sub-frames (101).

6. The heating device according to claim 5, characterized in that, The heating device (10) also includes a plurality of second fasteners (120), and the heating body (110) and the second metal purlin (1015) are fixedly connected by the second fasteners (120).

7. The heating device according to any one of claims 1-6, characterized in that, The heating device (10) further includes a heat-insulating protective layer, which surrounds the outer periphery of the frame (100); and / or, The heating device (10) further includes a temperature detection element (130) and a control unit (140). The temperature detection element (130) is configured to detect the temperature of the accommodating cavity (102). The control unit (140) is fixed to the side of the frame (100) away from the valve body (200). The temperature detection element (130) and the heating element (110) are both electrically connected to the control unit (140).

8. The heating device according to claim 7, characterized in that, When the heating device (10) includes a heat insulation protective layer, and the heat insulation protective layer surrounds the outer periphery of the frame (100), the bottom of the heat insulation protective layer has a drain outlet, and the drain outlet is connected to the accommodating cavity (102).

9. A valve body assembly, characterized in that, It includes a valve body (200) and a heating device (10) as described in any one of claims 1-8 above.

10. An air separation device, characterized in that, Includes the valve body assembly (20) as described in claim 9 above.

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