Temperature measuring device and temperature measuring structure

Abstract

The application belongs to the field of measuring equipment, and provides a temperature measuring device and a temperature measuring structure. The temperature measuring device comprises a protective tube assembly and a temperature measuring assembly. The protective tube assembly comprises a tube body, and the temperature measuring assembly comprises a temperature measuring element. One end of the tube body is a closed end, and the temperature measuring element is arranged in the tube body close to the closed end. The tube body further comprises a base and an elastic part. The base is used for fixedly and sealingly connecting with a first wall, and the elastic part is arranged between the closed end and the base. The temperature measuring structure comprises the above-mentioned temperature measuring device and a body to be measured. The body to be measured comprises a first wall and a second wall which are arranged in a stack. The closed end of the tube body penetrates through the first wall and is in contact with the second wall. The tube body is sealingly connected with the first wall, and the elastic part of the tube body presses the closed end on the second wall. The application can make the closed end tightly contact with the second wall, ensure the temperature measuring effect of the closed end, and avoid damaging the protective atmosphere when replacing the temperature measuring element. Meanwhile, the tube body is prevented from being damaged or broken due to being extruded by the second wall.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of measuring equipment, in particular to a temperature measuring device and a temperature measuring structure. BACKGROUND

[0002] In order to ensure the sealing performance, when liquid metal sodium and other materials requiring good sealing protection are used as transmission medium, a double-layer pipeline is usually used for the transmission pipeline. The double-layer pipeline includes an inner pipe and an outer pipe, and a protective atmosphere is usually filled between the inner pipe and the outer pipe. In order to detect the temperature of the transmission medium in the inner pipe, a temperature detection device is usually arranged between the inner pipe and the outer pipe, and the temperature of the transmission medium in the inner pipe is detected by detecting the temperature of the outer wall of the inner pipe. The temperature detection device needs to pass through the outer pipe in order to read the detection signal. Because different materials are used between the inner and outer pipes, the pipe expansion coefficients are different, or the same material is used between the inner and outer pipes, but the temperature difference between the inner and outer pipes causes different displacement amounts between the inner and outer pipes. When the distance between the inner and outer pipes increases, a gap appears between the temperature detection device and the outer wall of the inner pipe, which affects the measurement effect. When the distance between the inner and outer pipes decreases, the temperature measuring device is squeezed, causing damage to the temperature measuring device and the transmission pipeline. After the temperature measuring element in the temperature detection device is damaged, the temperature detection device needs to be replaced as a whole, and the direct replacement of the temperature detection device will cause the leakage of the protective atmosphere between the inner and outer pipes, which needs to be pre-vented, resulting in difficulty in maintenance and replacement of the temperature detection device. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a temperature measuring device and a temperature measuring structure, which can solve the problems of poor measurement effect, easy damage and difficult maintenance and replacement of the temperature detection device in the prior art.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a temperature measuring device for detecting the temperature of a measured body, the measured body comprising a first wall and a second wall arranged in layers, comprising:

[0005] A protective pipe assembly comprising a pipe body,

[0006] A temperature measuring assembly comprising a temperature measuring element,

[0007] Wherein one end of the pipe body is a closed end, the temperature measuring element is detachably arranged in the pipe body and in contact with the inner side of the closed end, the closed end is used to pass through the first wall and contact the second wall, the pipe body further comprises a base and an elastic part, the base is used to be fixedly and sealingly connected with the first wall, and the elastic part is arranged between the closed end and the base and used to press the closed end on the second wall.

[0008] Optionally, the temperature measuring assembly comprises a compression spring, which compresses the temperature measuring element on the inner side of the sealed end.

[0009] Optionally, the elastic part is an elastic bellow, which is arranged along the extension direction of the pipe body.

[0010] Optionally, one end of the pipe body away from the sealed end is a mounting end, which is provided with a mounting opening for mounting the temperature measuring assembly, and the temperature measuring element is arranged in the pipe body through the mounting opening.

[0011] Optionally, the temperature measuring assembly further comprises a mounting fixture, which is detachably connected to the pipe body, and the mounting fixture restricts the position of the compression spring, and the temperature measuring element is compressed on the inner side of the sealed end of the pipe body by the compression spring.

[0012] Optionally, the temperature measuring element is provided with a retaining ring, one end of the compression spring acts on the mounting fixture, and the other end of the compression spring acts on the retaining ring, and the mounting fixture compresses the temperature measuring element in the pipe body through the spring and the retaining ring.

[0013] Optionally, the temperature measuring element is a sheathed thermocouple.

[0014] Optionally, one end of the temperature measuring element close to the sealed end of the pipe body is a hot end, and the other end of the temperature measuring element is a cold end, the cold end is provided with a cold end protection cap, and the cold end protection cap and the temperature measuring element are filled with insulating material.

[0015] Optionally, the protection pipe assembly further comprises a mounting seat for sealing connection with the first wall, the mounting seat is tubular, the pipe body is detachably arranged in the mounting seat and sealingly connected with the mounting seat, and the pipe body is sealingly connected between the mounting seat and the first wall.

[0016] Optionally, the protection pipe assembly further comprises a connecting screw sleeve, which is rotatably sleeved on the base of the pipe body, and the mounting seat is provided with threads matched with the connecting screw sleeve, and the pipe body is sealingly connected on the mounting seat through the connecting screw sleeve.

[0017] Optionally, a sealing gasket is arranged between the mounting seat and the pipe body, and the mounting seat and the pipe body are sealed through the sealing gasket.

[0018] Optionally, a wiring assembly is further included, a telescopic cavity is arranged in the wiring assembly, the wiring assembly is sleeved on one end of the pipe body away from the closed end, the pipe body can telescopically move in the telescopic cavity, and the wiring assembly comprises a clamping nut which restricts the relative position between the wiring assembly and the pipe body.

[0019] The application further provides a temperature measuring structure comprising the temperature measuring device and a body to be measured, wherein the body to be measured comprises a first wall and a second wall which are arranged in layers, the closed end of the pipe body penetrates through the first wall and is in contact with the second wall, the pipe body is in sealed connection with the first wall, and the elastic part of the pipe body presses the closed end against the second wall. Optionally, the elastic part is an elastic bellow which is arranged along the line between the closed end and the mounting end.

[0020] As described above, the temperature measuring device and the temperature measuring structure have the following beneficial effects: since the closed end of the pipe body is in a closed state and the base is in sealed connection with the first wall, when the first wall and the second wall are filled with a medium such as a protective atmosphere, the protective atmosphere will not leak from the temperature measuring device. Moreover, since the temperature measuring element is detachably arranged in the pipe body, when the temperature measuring element is damaged, the temperature measuring element can be detached from the pipe body for replacement. Since the pipe body is sealed with the first wall and the end of the pipe body penetrating into the first wall is closed as the closed end, when the temperature measuring element is detached for replacement, the protective atmosphere between the first wall and the second wall will not leak, and the protective atmosphere does not need to be discharged in advance, so that the replacement of the temperature measuring element is simple and convenient.

[0021] Meanwhile, since the pipe body comprises the elastic part, when the elastic part is fixedly connected to the first wall, the elastic part is compressed by a part, and the closed end is pressed against the second wall. When the relative distance between the first wall and the second wall increases due to temperature change or the like, the elastic part can be correspondingly elongated, so that the closed end is still in close contact with the second wall, and the temperature measuring effect of the closed end is good. When the relative distance between the first wall and the second wall decreases, the elastic part can be correspondingly contracted, so that the pipe body is prevented from being damaged or broken due to the extrusion of the second wall. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a structural schematic view of a temperature measuring structure in an embodiment of the application;

[0023] Figure 2 FIG. 2 is a structural schematic view of a temperature measuring device in an embodiment of the application;

[0024] Figure 3 FIG. 3 is a structural schematic view of a wiring assembly in an embodiment of the application;

[0025] Figure 4 FIG. 4 is a structural schematic view of a temperature measuring assembly in an embodiment of the application;

[0026] Figure 5 Structure diagram of the protective tube assembly in the embodiment of the present application;

[0027] Figure 6 Structure diagram of the protective tube assembly in the embodiment of the present application; Figure 5 Sectional view of A-A direction in the embodiment of the present application;

[0028] Figure 7 Structure diagram of the temperature measuring assembly and the protective tube assembly after assembly in the embodiment of the present application.

[0029] Legend of the reference signs: mounting base 2, outer tube 3, inner tube 4, wiring assembly 5, protective tube assembly 7, thermal insulation layer 8, cable locking joint 51, junction box assembly 52, locking nut 53, extension section 54, clamping nut 55, compensation wire 61, mounting and fixing part 62, cold end protective cap 63, compression spring 64, retaining ring 65, temperature measuring element 66, mounting end 71, connecting screw sleeve 72, sealing gasket 73, elastic bellows 74, closed end 75. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0031] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the defined conditions that the present application can be implemented, so they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the present application that can be implemented, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application that can be implemented.

[0032] Please refer to Figures 1 to 7 The present embodiment provides a temperature measuring device for detecting the temperature of a measured body, which includes a first wall and a second wall arranged in layers. As shown in Figure 2 , the temperature measuring device includes a protective tube assembly 7 and a temperature measuring assembly, the protective tube assembly 7 includes a tube body, one end of the tube body is closed as a closed end 75, the closed end 75 can pass through the first wall and contact the second wall. As shown in Figure 7 and Figure 4As shown, the temperature measuring element 66 is arranged in the tube body and contacts the inner side of the closed end 75, and the temperature measuring element 66 can measure the temperature of the second wall through the closed end 75.

[0033] The tube body further comprises a base part and an elastic part, the base part is fixedly and sealingly connected to the first wall, and the elastic part is arranged between the closed end 75 and the base part and can press the closed end 75 against the second wall to ensure good contact between the closed end 75 and the second wall and ensure the temperature measuring effect. In the embodiment, the elastic part is an elastic bellows 74, which is arranged along the extension direction of the tube body. The elastic bellows 74 is a hollow sealed tubular structure, and no additional hole is needed for the temperature measuring element 66 to pass through, so the production process is simple and easy to manufacture.

[0034] Since the closed end 75 of the tube body is in a closed state, and the base part is sealingly connected to the first wall, when the medium such as the protective atmosphere is filled between the first wall and the second wall, the protective atmosphere will not leak from the temperature measuring device. Moreover, since the temperature measuring element 66 is detachably arranged in the tube body, when the temperature measuring element 66 is damaged, the temperature measuring element 66 can be detached from the tube body for replacement. Since the tube body is sealed with the first wall, and the end of the tube body extending into the first wall is closed as the closed end 75, when the temperature measuring element 66 is replaced, the protective atmosphere between the first wall and the second wall will not leak, and the protective atmosphere does not need to be discharged in advance, so that the replacement of the temperature measuring element 66 is simple and convenient.

[0035] Meanwhile, since the tube body comprises the elastic part, when fixedly connected to the first wall, the elastic part is compressed by a part, so that the closed end 75 is pressed against the second wall. When the relative distance between the first wall and the second wall increases due to temperature changes or other reasons, the elastic part can be correspondingly elongated, so that the closed end 75 is still in close contact with the second wall, and the temperature measuring effect of the closed end 75 is good. When the relative distance between the first wall and the second wall decreases, the elastic part can be correspondingly contracted, so as to prevent the tube body from being damaged or broken due to the extrusion of the second wall.

[0036] In the embodiment, the temperature measuring assembly further comprises a pressing spring 64, which presses the temperature measuring element 66 against the inner side of the closed end, so that the temperature measuring element 66 is always in good contact with the closed end 75, ensuring the detection effect of the temperature measuring element 66. Also, when the closed end 75 is pressed, the temperature measuring element 66 can move correspondingly, preventing the temperature measuring element 66 from being damaged by pressure.

[0037] Specifically, the temperature measuring assembly further comprises a mounting and fixing member 62, which is detachably connected to the pipe body and restricts the position of the compression spring 64. The temperature measuring element 66 is compressed on the inner side of the closed end 75 of the pipe body by the compression spring 64. The temperature measuring element 66 is provided with a check ring 65. One end of the compression spring 64 acts on the mounting and fixing member 62, and the other end of the compression spring 64 acts on the check ring 65. The mounting and fixing member 62 compresses the temperature measuring element 66 in the pipe body through the spring and the check ring 65.

[0038] In the embodiment, one end of the pipe body away from the closed end 75 is the mounting end 71. The mounting end 71 is provided with a mounting opening for mounting the temperature measuring assembly. The temperature measuring element 66 is arranged in the pipe body through the mounting opening. The mounting and fixing member 62 is a mounting bolt. The inner wall of the mounting opening is provided with threads matched with the mounting and fixing member 62. The mounting and fixing member 62 can be connected to the mounting opening of the pipe body through the threads. Meanwhile, the mounting and fixing member 62 can also adjust the compression amount of the compression spring 64 through the threads, so as to ensure that the temperature measuring element 66 is compressed on the inner side of the closed end 75.

[0039] In the embodiment, the temperature measuring element 66 is a sheathed thermocouple. One end of the temperature measuring element 66 close to the closed end 75 of the pipe body is the hot end, and the other end is the cold end. The cold end is connected with a compensation lead wire 61. The cold end is covered with a cold end protection cap 63. An insulating material such as epoxy resin is filled between the cold end protection cap 63 and the temperature measuring element 66. The insulating material insulates the temperature measuring element 66 from the surrounding components and ensures safety. Meanwhile, the mounting and fixing member is provided with a mounting groove for mounting the cold end protection cap 63. The cold end protection cap 63 is mounted on the mounting and fixing member through the mounting groove. The two sides of the cold end protection cap 63 are machined with planes. The shape of the groove is adapted to the cross-sectional shape of the cold end protection cap 63. The planes on the cold end protection cap 63 cooperate with the mounting groove on the mounting and fixing member 62, which can prevent the cold end protection cap 63 from rotating in the circumferential direction, fix the position of the compensation lead wire 61, and protect the compensation lead wire 61. Meanwhile, the planes on the cold end protection cap 63 also play a guiding role when the cold end protection cap 63 is mounted on the mounting and fixing member.

[0040] The protective tube assembly 7 further comprises a mounting seat 2, which can be sealingly connected to the first wall by welding, screwing or the like. The mounting seat 2 is tubular. The pipe body is detachably arranged in the mounting seat 2 and sealingly connected to the mounting seat. The pipe body is sealingly connected between the mounting seat 2 and the first wall.

[0041] As Figure 5As shown, the protection tube assembly 7 in the embodiment also includes a connecting screw 72, which is rotatably sleeved on the base of the tube body. The mounting seat 2 is provided with threads matched with the connecting screw 72, and the tube body can be sealingly connected to the mounting seat 2 through the connecting screw 72. Specifically, a sealing gasket 73 is arranged between the mounting seat 2 and the tube body, and the mounting seat 2 and the tube body are sealed through the sealing gasket 73.

[0042] As shown in the drawings, Figure 3 As shown, the temperature measuring device also includes a wiring assembly 5, which is provided with an extension cavity. The wiring assembly 5 is composed of a cable locking joint 51, a wiring box assembly 52, a locking nut 53, and an extension section 54. The wiring box assembly 52 is composed of a wiring box body, a wiring box cover, a wiring board assembly, and the like. The wiring box body and the wiring box cover are connected by a chain, and the wiring board assembly is composed of a ceramic wiring board, a wiring post, and the like.

[0043] The extension cavity is arranged in the extension section 54, and the wiring assembly 5 is sleeved on one end of the tube body provided with the temperature measuring assembly. The tube body of the protection tube assembly 7 can move in and out of the extension cavity.

[0044] The wiring assembly 5 also includes a clamping nut 55, which restricts the relative position between the wiring assembly 5 and the protection tube assembly 7. The tube body can move in and out of the extension cavity, so the wiring assembly 55 can adjust the position relative to the tube body, so as to adapt to the installation space on site.

[0045] The clamping nut 55 is composed of a nut body, a movable clamp, a clamping bolt seat, and a locking screw. The clamping bolt seat is welded to the extension section. In the embodiment, the part between the mounting end 71 of the tube body and the elastic bellow 74 is a guide rod, as shown in the drawings. Figure 6 A limiting plane is machined on one side of the guide rod, and the limiting plane is matched with the locking screw on the clamping nut 55.

[0046] When the clamping nut 55 is sleeved on the guide rod and adjusted to a suitable position, the movable clamp can be clamped tightly around the guide rod by tightening the nut body. By tightening the locking screw, the limiting plane is matched with the locking screw, which can prevent the wiring assembly 5 from rotating around the axis of the tube body and restrict the limit extension position of the wiring assembly 5 relative to the tube body.

[0047] As shown in the drawings, Figure 1 The embodiment also provides a temperature measuring structure, which includes the temperature measuring device and a measured body, as described above. The measured body includes a first wall and a second wall arranged in layers, and the closed end 75 of the tube body penetrates through the first wall and contacts the second wall. The tube body is sealingly connected to the first wall, and the elastic element of the tube body presses the closed end 75 against the second wall. Optionally, the elastic element is an elastic bellow 74, which is arranged along the connecting line between the closed end 75 and the mounting end 71.

[0048] In this embodiment, the measured body is a double-layer pipeline, the first wall is the outer pipe 3 of the double-layer pipeline, the outer pipe 3 is provided with a detection hole for the protection pipe assembly 7 to pass through, and the second wall is the inner pipe 4 of the double-layer pipeline, and the inner pipe 4 flows with liquid sodium.

[0049] When the temperature measuring assembly is actually assembled, the sequence is as follows:

[0050] 1. After distinguishing the positive and negative poles of the compensation wire 61, the compensation wire 61 is welded with the temperature measuring element 66;

[0051] 2. The cold end protection cap 63 is fixed on the temperature measuring element 66 by size pressing, and the cold end protection cap 63 is filled with sealing and insulating material;

[0052] 3. The temperature measuring element 66, the mounting fixture 62, the compression spring 64 and the retaining ring 65 are assembled in sequence, wherein the retaining ring 65 can be fixed on the temperature measuring element 66 by laser welding or extrusion deformation.

[0053] In actual use, the mounting seat 2 is first welded with the outer pipe 3, then the connecting interface of the mounting seat 2 is sealed by a plug, and then the leak detection test and pressure test between the inner and outer pipes are carried out, and after the test is qualified, the temperature measuring instrument is screwed and fixed on the mounting seat 2.

[0054] When the temperature measuring element 66 needs to be replaced, the wiring assembly 5 can be detached from the guide rod, and then the mounting fixture 62 of the protection pipe assembly 7 is disassembled, so that the temperature measuring element 66 can be taken out of the pipe body. At this time, the outer pipe 3 and the outer pipe 3 are still in a sealed state, so that during the replacement of the temperature measuring element 66, the leakage of dangerous media such as liquid sodium can be effectively prevented, and the operation is simple.

[0055] As described above, in this embodiment, the protection pipe assembly 7 and the temperature measuring assembly can be axially deformed to adapt to the deformation of the double-layer pipe. The temperature measuring element 66 can select armored thermocouples and platinum thermal resistors of various scales. The elastic protection pipe can realize axial compression movement and ensure its structural integrity under 2Mpa pressure.

[0056] The compression spring can realize the corresponding axial compression movement of the temperature measuring element 66 and the protection pipe assembly 7, so that the temperature measuring element 66 is always tightly attached to the bottom of the closed end 75. The temperature measuring assembly can be replaced at any time after reaching the calibration period or failure, and the replacement steps are simple. In the case that the distance between the double-layer pipes is different, the protection pipe assembly 77 can ensure that the closed end 75 is tightly attached to the inner pipe wall, so as to accurately measure the surface temperature of the inner pipe.

[0057] The embodiment is suitable for double-layer pipeline or other double-layer container, and is simple to install and replace under the condition of meeting the temperature measuring purpose. Since the temperature measuring assembly is detachably arranged on the pipe body, when the temperature measuring assembly is invalid or damaged, the temperature measuring assembly can be detached without detaching the pipe body, so that the temperature measuring element 66 can be replaced without destroying the protective atmosphere, and leakage and loss of dangerous transmission medium such as liquid sodium are avoided.

[0058] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A temperature measuring device for detecting a temperature of an object to be measured, the object to be measured including a first wall and a second wall which are arranged in a stacked manner, characterized by, The temperature measuring device comprises: a protective tube assembly comprising a tube body, a temperature measuring assembly comprising a temperature measuring element, the temperature measuring element being a sheathed thermocouple; wherein one end of the tube body is a closed end, the temperature measuring element is detachably arranged in the tube body and in contact with the inner side of the closed end, the closed end is used to pass through the first wall and contact the second wall, the tube body further comprises a base and an elastic part, the base is used to be fixedly and sealingly connected with the first wall, the elastic part is arranged between the closed end and the base and is used to press the closed end against the second wall; the elastic part is an elastic bellows, and the elastic bellows is arranged along the extension direction of the tube body; the protective tube assembly further comprises a mounting seat used to be sealingly connected with the first wall, the mounting seat is tubular, the tube body is detachably arranged in the mounting seat and sealingly connected with the mounting seat, and the tube body is sealingly connected with the first wall through the mounting seat; the protective tube assembly further comprises a connecting screw sleeve, the connecting screw sleeve is rotationally arranged on the base of the tube body, the mounting seat is provided with threads matched with the connecting screw sleeve, and the tube body is sealingly connected with the mounting seat through the connecting screw sleeve; the temperature measuring assembly comprises a compression spring, the compression spring is used to press the temperature measuring element against the inner side of the closed end; the temperature measuring assembly further comprises a mounting fixture, the mounting fixture is detachably connected with the tube body, the mounting fixture restricts the position of the compression spring, and the temperature measuring element is pressed against the inner side of the closed end of the tube body through the compression spring; one end of the temperature measuring element close to the closed end of the tube body is a hot end, and the other end of the temperature measuring element is a cold end, the cold end is provided with a cold end protection cap, and the cold end protection cap is filled with insulating material with the temperature measuring element; when the elastic part is fixedly connected with the first wall, the elastic part is in a compressed state, and the closed end abuts against the second wall; when the relative distance between the first wall and the second wall increases, the elastic part is elongated and in a compressed state, and the closed end is in close contact with the second wall; the temperature measuring device further comprises a wiring assembly, the wiring assembly is provided with an extension cavity, and the wiring assembly is arranged on one end of the tube body away from the closed end; the tube body can move in and out of the extension cavity, and the wiring assembly comprises a clamping nut, the clamping nut restricts the relative position between the wiring assembly and the tube body.

2. The temperature measuring device of claim 1, wherein: one end of the tube body away from the closed end is a mounting end, the mounting end is provided with a mounting opening used for mounting the temperature measuring assembly, and the temperature measuring element is arranged in the tube body through the mounting opening.

3. A temperature measuring structure, characterized by: The temperature measuring device comprises the temperature measuring device and a measured body according to any one of claims 1-2, the measured body comprises a first wall and a second wall arranged in layers, the closed end of the tube body passes through the first wall and contacts the second wall, the tube body is sealingly connected with the first wall, and the elastic part of the tube body presses the closed end against the second wall.

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