High-sealing thermocouple common return connection assembly and its manufacturing method

Abstract

This invention relates to the field of testing technology, and more particularly to a high-sealing thermocouple common return connection assembly and its manufacturing method. The connection assembly includes: a connecting flange, two first thermocouple wires, two second thermocouple wires, two male thermocouple sockets, and two female thermocouple sockets. The two first thermocouple wires and two second thermocouple wires pass through four thermocouple wire holes alternately. Both ends of each set of thermocouple wires are coiled and wound at least once within a sealing groove. The thermocouple wire layers are filled with sealant to form a sealant layer. One end of each thermocouple wire set is connected to a male thermocouple socket, and the other end of each set of thermocouple wires is connected to a female thermocouple socket. On the same side of the connecting flange are a male thermocouple socket and a female thermocouple socket. The advantage of this invention is that the symmetry of the connecting flange is ensured by the male and female thermocouple sockets connected on both sides of the connecting flange.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and in particular to a high-sealing thermocouple common return connection assembly and its manufacturing method. Background Technology

[0002] In spacecraft thermal balance, thermal vacuum, vacuum discharge, or thermo-optical experiments, it is often necessary to monitor the temperature of critical components throughout the entire process and assess the product's temperature status. Thermocouples, as commonly used temperature sensors, are widely used in these experiments. The temperature measurement characteristics of thermocouples dictate that a stable reference point temperature must be provided when using them for temperature measurement; this reference point temperature is provided by a "freezing point" device. Since the aforementioned vacuum tests all need to be conducted within various types of vacuum chambers, a connection assembly is required when using thermocouples to connect the common loop of the thermocouples inside the vacuum chamber to the "freezing point" reference point outside the vacuum chamber.

[0003] Thermocouple common return connection components need to have high sealing performance to ensure that the vacuum level inside the vacuum container is not affected by leakage. Patent CN 204732600 U invented a container-penetrating connector. The connector body is made of polyimide, and two sets of thermocouple wires of different materials pass through four holes on the connector. Finally, adhesive is used to seal the holes through which the thermocouples pass. Due to the inherent strength limitations of polyimide material, the connector is susceptible to deformation leading to leakage. Moreover, sealing only the holes locally with adhesive results in insufficient sealing, thus causing leakage. Summary of the Invention

[0004] In view of this, the present invention aims to create a high-sealing thermocouple common return connection assembly and its manufacturing method, wherein the symmetrical structure of the connection flange and the winding method of the thermocouple wire ensure the sealing performance of the connection flange.

[0005] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0006] A high-sealing thermocouple common return connection assembly includes: a connecting flange, two first thermocouple wires, two second thermocouple wires, two thermocouple male sockets, and two thermocouple female sockets; wherein, the connecting flange has four through-holes for the thermocouple wires, and sealing grooves are provided on both end faces of the connecting flange; the thermocouple wire holes are tapered holes that narrow in the middle and gradually widen at both ends; the two first thermocouple wires and the two second thermocouple wires pass through the four thermocouple wire holes alternately, forming two sets of thermocouple wire groups; the two sets of thermocouples... Each thermocouple assembly includes a first thermocouple wire and a second thermocouple wire; both ends of the two thermocouple wire assemblies are coiled and wound in the sealing groove to form at least one layer of thermocouple wire, each layer of thermocouple wire being coiled at least once, and the thermocouple wire layers are filled with sealant to form a sealant layer; one end of each thermocouple wire assembly is connected to a male thermocouple socket, and the other end of each thermocouple wire assembly is connected to a female thermocouple socket; on the same side of the connecting flange, one end of each of the two thermocouple wire assemblies is connected to a male thermocouple socket and a female thermocouple socket, respectively.

[0007] Furthermore, the first and second thermocouple wires in each thermocouple wire layer are coiled more than two times, with gaps between adjacent coils.

[0008] Furthermore, the number of thermocouple wire layers is greater than or equal to two.

[0009] Furthermore, the end face of the sealant layer is flush with the end face of the connecting flange.

[0010] Furthermore, the connecting flange is made of aluminum alloy.

[0011] Furthermore, the four thermocouple wire holes are evenly distributed radially along the connecting flange.

[0012] Furthermore, the center line connecting the four thermocouple wire holes forms a rectangle, and this rectangle is symmetrically arranged with respect to the center line of the connecting flange.

[0013] A method for manufacturing a high-sealing thermocouple common return connection assembly, based on the aforementioned high-sealing thermocouple common return connection assembly, includes the following steps:

[0014] S1. Pass the two first thermocouple wires and the two second thermocouple wires through the four thermocouple wire holes in an alternating manner;

[0015] S2. Divide the two first thermocouple wires and the two second thermocouple wires into two groups, each group consisting of one first thermocouple wire and one second thermocouple wire.

[0016] S3. Wrap the two ends of each thermocouple wire group around the sealing grooves on both sides of the connecting flange to form a thermocouple wire layer, leaving a gap between adjacent turns;

[0017] S4. Apply sealant to the thermocouple wire layer and the four thermocouple wire holes in step S3 to form a sealing layer;

[0018] S5. Connect one end of each thermocouple wire group to a thermocouple male socket, and the other end of each thermocouple wire group to a thermocouple female socket; and ensure that one end of each of the two thermocouple wire groups on the same side of the connecting flange is connected to a thermocouple male socket and a thermocouple female socket respectively.

[0019] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0020] 1) The shape of the thermocouple wire hole in this invention is a tapered hole that narrows in the middle and expands at both ends, and the winding method of the thermocouple wire makes the thermocouple wire seal more secure.

[0021] 2) The symmetry of the connecting flange is ensured by the thermocouple male and female sockets connected on both sides of the connecting flange. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a high-sealing thermocouple common return connection assembly provided in an embodiment of the present invention;

[0024] Figure 2 This is a structural schematic diagram of a connecting flange provided according to an embodiment of the present invention.

[0025] The reference numerals in the attached drawings include: 1. connecting flange; 2. first thermocouple wire; 3. second thermocouple wire; 4. thermocouple male socket; 5. thermocouple female socket; 6. thermocouple wire hole; 7. sealing groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute a limitation thereof.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not 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 on this invention. Furthermore, the terms "first," "second," etc., 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, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figure 1 , Figure 2 As shown in the figure, an embodiment of the present invention provides a high-sealing thermocouple common return connection assembly, comprising: a connecting flange 1, two first thermocouple wires 2, two second thermocouple wires 3, two thermocouple male sockets 4, and two thermocouple female sockets 5. In this embodiment, the connecting flange 1 is made of aluminum alloy. Using aluminum alloy increases the flange strength, thereby reducing deformation and improving the sealing performance of the connecting flange 1.

[0032] The flange face of the connecting flange 1 is provided with four thermocouple wire holes 6, and sealing grooves 7 are also provided on both ends of the connecting flange 1; the thermocouple wire holes 3 are tapered holes that narrow in the middle and gradually widen at both ends; this design helps the thermocouple wires to achieve a better sealing effect when passing through, while reducing stress concentration caused by thermal expansion and contraction.

[0033] Two first thermocouple wires 2 and two second thermocouple wires 3 are alternately passed through four thermocouple wire holes 6, forming two sets of thermocouple wire groups. Each thermocouple wire group includes one first thermocouple wire 2 and one second thermocouple wire 3. Specifically, one first thermocouple wire and one second thermocouple wire are sequentially passed through each thermocouple wire hole 3, forming an arrangement pattern of ABAB or BABA (where A represents the first thermocouple wire and B represents the second thermocouple wire). That is, the first thermocouple wire hole passes through a first thermocouple wire 2, the second thermocouple wire hole passes through a second thermocouple wire 3, the third thermocouple wire hole again passes through a first thermocouple wire 2, and the fourth hole passes through the last second thermocouple wire 3. This alternating arrangement ensures the uniform distribution of thermocouple wires inside the tank and helps reduce measurement errors caused by improper thermocouple wire arrangement. This alternating arrangement also helps to evenly distribute the stress of the thermocouple wires on the flange, improving the stability and durability of the overall structure.

[0034] Both ends of the two sets of thermocouple wires are coiled and wound within the sealing groove 7 to form at least one layer of thermocouple wire. Each layer of thermocouple wire is coiled at least once, and the thermocouple wire layers are filled with sealant to form a sealant layer. The end face of the sealant layer is flush with the end face of the connecting flange 1. This not only increases the contact area between the thermocouple wires and the sealing groove 7, but also forms a robust sealant layer by filling with sealant, effectively preventing interference from the external environment to the thermocouple wires.

[0035] In this embodiment, the first thermocouple wire 2 and the second thermocouple wire 3 in each thermocouple wire layer are coiled more than two turns, and there is a gap between adjacent turns.

[0036] In this embodiment, the thermocouple wire layer has one layer; in other embodiments, the thermocouple wire layer has two or more layers.

[0037] This increases the contact area between the thermocouple wire and the sealing groove 7, allowing the filled sealant to penetrate and cure more fully, thus enhancing the overall sealing effect. It also helps prevent gaseous, liquid, or solid impurities from the external environment from entering the gap between the thermocouple wire and the flange, ensuring the stability and measurement accuracy of the thermocouple wire. Two or more turns make the thermocouple wire more securely fixed to the flange, reducing the risk of loosening or falling off due to external factors such as vibration and impact. At the same time, the gap between adjacent turns allows for a certain amount of thermal expansion and contraction space, avoiding excessive stress caused by temperature changes, further improving the structural strength and service life of the assembly.

[0038] One end of each thermocouple wire assembly is connected to a male thermocouple socket 4, and the other end of each thermocouple wire assembly is connected to a female thermocouple socket 5. Furthermore, on the same side of the connecting flange 1, one end of each of the two thermocouple wire assemblies is connected to a male thermocouple socket 4 and a female thermocouple socket 5, respectively. This ensures the symmetry of the connecting flange 1, allowing workers to assemble the assembly without needing to distinguish between the correct and incorrect orientations; it is ready to use immediately.

[0039] Furthermore, the four thermocouple wire holes 6 are evenly distributed circumferentially along the flange face of the connecting flange 1.

[0040] Therefore, the circumferentially distributed thermocouple wire holes 6 ensure that the thermocouple wires are subjected to more uniform stress when connected to the flange 1. This helps reduce the risk of damage to the thermocouple wires or flanges due to stress concentration, and improves the stability and durability of the overall structure.

[0041] Furthermore, the center lines connecting the four thermocouple wire holes form a rectangle, which is symmetrically arranged with respect to the centerline of the connecting flange. Because the rectangle is symmetrical with respect to the centerline of connecting flange 1, the entire assembly is structurally more balanced. This helps reduce vibration and stress concentration caused by imbalance, improving the stability and durability of the assembly.

[0042] A method for manufacturing a high-sealing thermocouple common return connection assembly, based on the aforementioned high-sealing thermocouple common return connection assembly, includes the following steps:

[0043] S1. Pass two first thermocouple wires 2 and two second thermocouple wires 3 through the four thermocouple wire holes 6 in an alternating manner.

[0044] S2. Divide the thermocouple wires in S1 into two groups of thermocouple wires, each group including a first thermocouple wire 2 and a second thermocouple wire 3.

[0045] S3. Wrap the two ends of each thermocouple wire group around the sealing groove 7, leaving a gap between adjacent turns.

[0046] S4. Apply sealant to form a sealing layer.

[0047] S5. Connect one end of each thermocouple wire group to a thermocouple male socket 4, and the other end of each thermocouple wire group to a thermocouple female socket 5; and ensure that on the same side of the connecting flange there is a thermocouple male socket 4 and a thermocouple female socket 5.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0049] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A high-sealing thermocouple common return connection assembly, characterized in that, include: The system includes a connecting flange, two first thermocouple wires, two second thermocouple wires, two male thermocouple sockets, and two female thermocouple sockets; among which, The flange face of the connecting flange is provided with four through thermocouple wire holes, and sealing grooves are also provided on both ends of the connecting flange; the thermocouple wire holes are tapered holes that narrow in the middle and gradually widen at both ends. The two first thermocouple wires and the two second thermocouple wires pass through the four thermocouple wire holes in an alternating manner, forming two sets of thermocouple wire groups; each set of thermocouple wire groups includes one first thermocouple wire and one second thermocouple wire; both ends of the two sets of thermocouple wire groups are coiled and wound in the sealing groove to form at least one layer of thermocouple wire, each layer of thermocouple wire is coiled at least once, and the thermocouple wire layers are filled with sealant to form a sealant layer; One end of each thermocouple wire group is connected to a male thermocouple socket, and the other end of each thermocouple wire group is connected to a female thermocouple socket; one end of each of the two thermocouple wire groups on the same side of the connecting flange is connected to a male thermocouple socket and a female thermocouple socket, respectively.

2. The high-sealing thermocouple common return connection assembly according to claim 1, characterized in that, The first and second thermocouple wires in each layer of thermocouple wires are coiled more than two turns, with a gap between adjacent turns.

3. The high-sealing thermocouple common return connection assembly according to claim 2, characterized in that, The thermocouple wire layer has two or more layers.

4. The high-sealing thermocouple common return connection assembly according to claim 3, characterized in that, The end face of the sealant layer is flush with the end face of the connecting flange.

5. The high-sealing thermocouple common return connection assembly according to claim 1, characterized in that, The connecting flange is made of aluminum alloy.

6. The high-sealing thermocouple common return connection assembly according to claim 1, characterized in that, The four thermocouple wire holes are evenly distributed radially along the connecting flange.

7. The high-sealing thermocouple common return connection assembly according to claim 1, characterized in that, The center line connecting the four thermocouple wire holes forms a rectangle, and this rectangle is symmetrically arranged with respect to the center line of the connecting flange.

8. A method for manufacturing a high-sealing thermocouple common-loop connection assembly, implemented based on the high-sealing thermocouple common-loop connection assembly as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Pass the two first thermocouple wires and the two second thermocouple wires through the four thermocouple wire holes in an alternating manner; S2. The two first thermocouple wires and the two second thermocouple wires are grouped into two groups of thermocouple wires, each group of thermocouple wires including one first thermocouple wire and one second thermocouple wire; S3. Wrap the two ends of each thermocouple wire group around the sealing grooves on both sides of the connecting flange to form a thermocouple wire layer, leaving a gap between adjacent turns; S4. Apply sealant to the thermocouple wire layer and the four thermocouple wire holes in step S3 to form a sealing layer; S5. Connect one end of each group of thermocouple wires to a male thermocouple socket, and connect the other end of each group of thermocouple wires to a female thermocouple socket; and ensure that one end of each of the two groups of thermocouple wires on the same side of the connecting flange is connected to a male thermocouple socket and a female thermocouple socket respectively.

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