Temperature measuring transmission device

Abstract

The utility model relates to a kind of temperature measurement transmission devices, comprising: flange, one side of flange is sealed side, the other side is non-sealed side, the sealed side of flange is equipped with containing groove, the side wall of containing groove has wavy recess structure;The non-sealed side of flange is equipped with multiple wire holes that communicate containing groove;Epoxy resin casting, epoxy resin casting is set in containing groove and wire hole;And multiple thermocouple wires, thermocouple wire is respectively set in wire hole, and it is threaded through epoxy resin casting, by the containing groove of flange is set into wavy recess structure, on the one hand, it can increase the interface bonding length of flange and epoxy resin, improve the quality of interface bonding;On the other hand, it can form smooth transition, so that epoxy resin is not prone to stress concentration, to avoid epoxy resin and flange peeling, ensure that temperature measurement transmission device has better sealing, significantly reduce the interface air leakage problem.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a temperature measurement and transmission device. Background Technology

[0002] GIS (SF6 gas-insulated metal-enclosed switchgear) is a crucial piece of equipment for ensuring the safe operation of power systems. Its design prioritizes miniaturization, and temperature rise is a key factor limiting this miniaturization. To ensure the safe and stable operation of GIS, temperature rise tests are necessary to verify its adaptability to temperature changes under specific operating conditions. These tests assess the temperature rise of the GIS at rated current or higher, thereby determining whether it meets standard and usage requirements.

[0003] In GIS temperature rise experiments, a temperature transmission device is typically installed on the casing. This device transmits temperature signals monitored at sampling points on the conductors inside the GIS casing to a temperature detection instrument outside the casing for measurement and display, thereby determining whether the test results meet the requirements. Since the casing is filled with SF6 gas at a pressure ranging from 0.3 MPa to 0.6 MPa, while the outside is atmospheric pressure air, the pressure difference between the inside and outside is significant. Therefore, the sealing performance of the temperature transmission device is crucial for the GIS temperature rise test.

[0004] Current temperature measurement transmission devices generally include a temperature rise plate and thermocouple wires. The temperature rise plate has a cavity and a circular hole connecting the cavity. The thermocouple wires are placed inside the circular hole of the temperature rise plate, allowing the thermocouple wires to connect the inside and outside of the housing for signal transmission. Epoxy resin is injected into the cavity to fix the thermocouple wires and fill the gap between the temperature rise plate and the thermocouple wires, thus achieving good sealing. However, during the curing of the epoxy resin, residual stress exists, causing the formed epoxy resin casting to peel off from the temperature rise plate, creating gaps and leading to air leakage problems. Utility Model Content

[0005] Therefore, it is necessary to provide a temperature measurement transmission device that addresses the air leakage problem caused by residual stress in current temperature measurement transmission devices.

[0006] A temperature measurement transmission device, comprising:

[0007] A flange, wherein one side of the flange is a sealing side and the other side is a non-sealing side, the sealing side of the flange is provided with a receiving groove, the sidewall of the receiving groove has a wavy recessed structure; the non-sealing side of the flange is provided with a plurality of wire passage holes communicating with the receiving groove.

[0008] An epoxy resin casting, wherein the epoxy resin casting is disposed within the receiving groove and the wire passage hole; and...

[0009] Multiple thermocouple wires are respectively disposed in the wire through holes and pass through the epoxy resin casting body.

[0010] In one embodiment, the recessed structure includes an arc-shaped recessed wall recessed outward from the sidewall of the receiving groove and two arc-shaped transition walls connected to both ends of the arc-shaped recessed wall, both of which are tangent to the arc-shaped recessed wall and the sidewall of the receiving groove.

[0011] In one embodiment, the junction of the sidewall and bottom wall of the receiving groove has a rounded chamfer.

[0012] In one embodiment, the thermocouple wire has an adhesive section that is bonded to the epoxy resin casting.

[0013] In one embodiment, the thermocouple wire includes a conductor and an insulating protective layer, the conductor having an exposed section and a protective section connected to both sides of the exposed section, the insulating protective layer wrapping around the protective section, and the exposed section being part of the adhesive section.

[0014] In one embodiment, the length of the adhesive segment is greater than the length of the exposed segment, and the difference between the length of the adhesive segment and the length of the exposed segment is in the range of 2 mm to 3 mm.

[0015] In one embodiment, the conductor is made of a copper-nickel alloy material.

[0016] In one embodiment, the inner surface of the receiving groove has a sandblasted layer.

[0017] In one embodiment, the surface roughness of the blasted layer is Ra6.3.

[0018] In one embodiment, the flange has a rectangular sealing groove on the sealing side, the sealing groove surrounding the receiving groove.

[0019] In one embodiment, the surface roughness of the inner surface of the sealing groove is Ra1.6.

[0020] In one embodiment, the flange is made of aluminum alloy.

[0021] In summary, the temperature measurement and transmission device of this application has a simple manufacturing process and low manufacturing cost. The receiving groove and wire passage hole of the flange can be formed by machining. The epoxy resin casting body can be formed by injecting epoxy resin into the receiving groove of the flange as a whole, which has higher process reliability. Each thermocouple wire is respectively passed through each wire passage hole and sealed and fixed by the epoxy resin casting body.

[0022] The temperature measurement and transmission device of this application, by setting the receiving groove of the flange as a wavy recessed structure, can, on the one hand, increase the bonding length of the interface between the flange and the epoxy resin casting, and improve the quality of the interface bonding; on the other hand, it can form a smooth transition, making it less likely for stress concentration to occur in the epoxy resin casting, thereby avoiding the peeling of the epoxy resin casting from the flange, ensuring that the temperature measurement and transmission device has good sealing performance, and significantly reducing the problem of interface leakage. Attached Figure Description

[0023] Figure 1 A cross-sectional schematic diagram of a temperature measurement transmission device provided in one embodiment of this application;

[0024] Figure 2 A top view schematic diagram of the flange of the temperature measuring transmission device according to the above embodiments of this application is shown;

[0025] Figure 3 To illustrate, as shown Figure 1 A partial enlarged schematic diagram (A) of the flange of the temperature measurement and transmission device shown;

[0026] Figure 4 To illustrate, as shown Figure 1 The diagram shows a partial enlarged view (B) of the flange of the temperature measurement and transmission device.

[0027] Reference numerals: 10, flange; 11, sealing side; 12, non-sealing side; 13, receiving groove; 131, arc-shaped recessed wall; 132, arc-shaped transition wall; 133, rounded chamfer; 14, wire hole; 15, mounting hole; 20, epoxy resin casting; 30, thermocouple wire; 31, adhesive section; 32, conductor; 321, exposed section; 323, protective section; 33, insulating protective layer. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] In view of the air leakage problem caused by residual stress in the current temperature measurement transmission device, this application provides a temperature measurement transmission device.

[0035] Specifically, please refer to Figure 1 , Figure 2 and Figure 3 The temperature measurement and transmission device may include a flange 10, an epoxy resin casting 20, and multiple thermocouple wires 30. One side of the flange 10 is a sealed side 11, and the other side is a non-sealed side 12. The sealed side 11 of the flange 10 has a receiving groove 13, and the sidewall of the receiving groove 13 has a wavy concave structure. The non-sealed side 12 of the flange 10 has multiple wire-passing holes 14 that connect to the receiving groove 13. The epoxy resin casting 20 is disposed in the receiving groove 13 and the wire-passing holes 14, and the thermocouple wires 30 are respectively disposed in the wire-passing holes 14 and pass through the epoxy resin casting 20.

[0036] The temperature measurement and transmission device of this application has a simple manufacturing process and low manufacturing cost. The receiving groove 13 and the wire hole 14 of the flange 10 can be formed by machining. The epoxy resin casting body 20 can be formed by injecting epoxy resin into the receiving groove 13 of the flange 10 and casting it as a whole, which has higher process reliability. Each thermocouple wire 30 is respectively passed through each wire hole 14 and sealed and fixed by the epoxy resin casting body 20.

[0037] Understandably, the temperature measurement and transmission device of this application, by setting the receiving groove 13 of the flange 10 into a wavy recessed structure, can, on the one hand, increase the bonding length of the interface between the flange 10 and the epoxy resin casting 20, and improve the quality of the interface bonding; on the other hand, it can form a smooth transition curve, making it less likely for stress concentration to occur in the epoxy resin casting 20, thereby avoiding the epoxy resin casting 20 from peeling off from the flange 10, ensuring that the temperature measurement and transmission device has good sealing performance, and significantly reducing the problem of interface leakage.

[0038] More specifically, such as Figure 3As shown, in some embodiments, the recessed structure includes an arc-shaped recessed wall 131 recessed outward from the sidewall of the receiving groove 13 and two arc-shaped transition walls 132 connected to both ends of the arc-shaped recessed wall 131. Both arc-shaped transition walls 132 are tangent to the arc-shaped recessed wall 131 and the sidewall of the receiving groove 13. The two arc-shaped transition walls 132 and the arc-shaped recessed wall 131 form a wavy recessed structure. The arc-shaped recessed wall 131 can increase the interfacial bonding length between the sidewall of the receiving groove 13 and the epoxy resin casting 20, improving the interfacial bonding quality. Furthermore, the combination of the arc-shaped recessed wall 131 and the two arc-shaped transition walls 132 allows the sidewall of the receiving groove 13 to form a smooth, wavy transition curve, avoiding stress concentration and preventing the epoxy resin casting 20 from peeling off from the flange 10.

[0039] Preferably, such as Figure 3 As shown, in some embodiments, the connection between the sidewall and bottom wall of the receiving groove 13 has a rounded chamfer 133. In this way, a smooth transition curve is formed between the sidewall and bottom wall of the receiving groove 13 through the rounded chamfer 133, making it less likely for the epoxy resin casting 20 to experience stress concentration at the connection between the sidewall and bottom wall of the receiving groove 13, thus achieving better bonding quality between the epoxy resin casting 20 and the flange 10 at the connection between the sidewall and bottom wall of the receiving groove 13.

[0040] Furthermore, such as Figure 4 As shown, in some embodiments, the thermocouple wire 30 has an adhesive section 31 that is bonded to the epoxy resin casting 20. In this way, by applying an adhesive to the adhesive section 31 of the thermocouple wire 30 before casting the epoxy resin casting 20, the bonding quality between the epoxy resin casting 20 and the thermocouple wire 30 can be improved.

[0041] In particular, such as Figure 4 As shown, in some embodiments, the thermocouple wire 30 includes a conductor 32 and an insulating protective layer 33. The conductor 32 has an exposed section 321 and protective sections 323 connected to both sides of the exposed section 321. The insulating protective layer 33 wraps around the protective section 323, and the exposed section 321 is part of the adhesive section 31. Because the adhesion quality between the insulating protective layer 33 of the thermocouple wire 30 and the epoxy resin casting 20 is poor, the insulating protective layer 33 of the adhesive section 31 of the thermocouple wire 30 can be peeled off before applying the adhesive, dividing the conductor 32 into a protective section 323 wrapped by the insulating protective layer 33 and an exposed section 321 not wrapped by the insulating protective layer 33. Applying the adhesive directly to the exposed section 321 of the conductor 32 can significantly improve the adhesion quality between the thermocouple wire 30 and the epoxy resin casting 20.

[0042] Preferably, in some embodiments, the length of the adhesive section 31 is greater than the length of the exposed section 321, and the difference between the lengths of the adhesive section 31 and the exposed section 321 is in the range of 2 mm to 3 mm. With this configuration, by controlling the length of the exposed section 321 of the conductor 32, it can be ensured that the entire exposed section 321 of the conductor 32 is located within the epoxy resin casting 20. The epoxy resin casting 20 replaces the insulating protection section 323 to protect the exposed section 321 of the conductor 32, thereby preventing short circuits.

[0043] Optionally, in some embodiments, conductor 32 is made of copper-nickel alloy. Copper-nickel alloy has a wide temperature measurement range, and thermocouple wire 30 made of copper-nickel alloy can typically cover a temperature measurement range of -200°C to +1350°C, which can meet the testing requirements of temperature rise tests for GIS equipment. In addition, copper-nickel alloy has a lower cost, which can reduce the manufacturing cost of thermocouple wire 30.

[0044] Optionally, in some embodiments, the flange 10 is made of aluminum alloy. Aluminum alloy has high compressive strength, and the flange 10 made of aluminum alloy can meet the pressure requirements during the temperature rise test of GIS equipment.

[0045] In particular, in some embodiments, the inner surface of the receiving groove 13 has a sandblasted layer. In this way, sandblasting is performed on the inner surface of the receiving groove 13 to form a sandblasted layer before the epoxy resin casting 20 is poured, which can reduce the smoothness of the inner surface of the receiving groove 13, increase the bonding area, and thereby improve the interfacial bonding quality between the epoxy resin casting 20 and the flange 10.

[0046] Preferably, in some embodiments, the surface roughness of the sandblasted layer is Ra6.3. Thus, the greater the roughness, the rougher the surface of the sandblasted layer, and the larger the bonding area. Therefore, by controlling the surface roughness of the sandblasted layer to Ra6.3, the interfacial bonding quality between the epoxy resin casting 20 and the flange 10 can be ensured.

[0047] It is worth noting that after sandblasting the inner surface of the receiving tank 13, at least 24 hours must be waited to ensure that the surface roughness of the sandblasted layer is stable before the epoxy resin casting body 20 is cast.

[0048] In particular, such as Figure 2 and Figure 3 As shown, in some embodiments, the sealing side 11 of the flange 10 has a rectangular sealing groove that surrounds the receiving groove 13. The sealing groove can be used to install a sealing ring to ensure the sealing between the flange 10 and the GIS equipment housing, preventing SF6 gas inside the GIS equipment from leaking from the gap between the flange 10 and the GIS equipment housing.

[0049] Preferably, in some embodiments, the surface roughness of the inner surface of the sealing groove is Ra1.6. By controlling the surface roughness of the inner surface of the sealing groove, the smoothness of the inner surface of the sealing groove is ensured, so that the sealing ring can effectively fit with the inner surface of the sealing groove, thereby ensuring the sealing performance between the flange 10 and the GIS equipment housing.

[0050] Furthermore, such as Figure 2 and Figure 3 As shown, in some embodiments, the flange 10 is also provided with a plurality of mounting holes 15, which are arranged at intervals on the flange 10 and can engage with the threaded holes on the GIS equipment housing to fix the flange 10 to the GIS equipment housing.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A temperature measuring transmission device, characterized by, include: A flange, wherein one side of the flange is a sealing side and the other side is a non-sealing side, the sealing side of the flange is provided with a receiving groove, the sidewall of the receiving groove has a wavy recessed structure; the non-sealing side of the flange is provided with a plurality of wire passage holes communicating with the receiving groove. An epoxy resin casting, wherein the epoxy resin casting is disposed within the receiving groove and the wire passage hole; and Multiple thermocouple wires are respectively disposed in the wire-passing holes and pass through the epoxy resin casting body.

2. The temperature measuring transmission apparatus according to claim 1, wherein The recessed structure includes an arc-shaped recessed wall that is recessed outward from the side wall of the receiving groove and two arc-shaped transition walls connecting the two ends of the arc-shaped recessed wall. Both arc-shaped transition walls are tangent to the arc-shaped recessed wall and the side wall of the receiving groove.

3. The temperature measuring transmission apparatus according to claim 1, wherein The junction between the sidewall and bottom wall of the receiving groove has a rounded chamfer.

4. The temperature measurement transmission device according to any one of claims 1 to 3, characterized in that, The thermocouple wire has an adhesive section, which is bonded to the epoxy resin casting.

5. The temperature measurement and transmission device according to claim 4, characterized in that, The thermocouple wire includes a conductor and an insulating protective layer. The conductor has an exposed section and a protective section connected to both sides of the exposed section. The insulating protective layer wraps around the protective section. The exposed section is part of the adhesive section.

6. The temperature measurement and transmission device according to claim 5, characterized in that, The length of the bonded section is greater than the length of the exposed section, and the difference between the length of the bonded section and the length of the exposed section is in the range of 2mm to 3mm.

7. The temperature measurement and transmission device according to claim 5, characterized in that, The conductor is made of copper-nickel alloy material.

8. The temperature measurement and transmission device according to any one of claims 1 to 3, characterized in that, The inner surface of the receiving groove has a sandblasted layer.

9. The temperature measurement and transmission device according to any one of claims 1 to 3, characterized in that, The flange has a rectangular sealing groove on its sealing side, which surrounds the receiving groove.

10. The temperature measuring transmission apparatus according to any one of claims 1 to 3, wherein The flange is made of aluminum alloy.

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