Anti-seismic thermal resistor

Abstract

An anti-seismic thermal resistor comprises a sheath and a detection part, the detection part comprises a junction box, a groove is formed in the bottom of the junction box, a hollow bolt is fixedly installed in the groove through threads, a chuck is fixedly arranged at the lower end of the hollow bolt, a movable nut is movably arranged on the hollow bolt, and the movable nut is clamped through the chuck; according to the utility model, the sheath and the detection part are installed together through the movable nut capable of freely rotating and the threaded connection, the product height and the vibration amplitude are reduced through the connection mode, the service life of the product is prolonged, the product stability is ensured, and the installation is faster and more convenient in a narrow space. Meanwhile, the interior of the junction box is filled with the sealant, and the sealant wraps the ceramic plate, thereby preventing the vibration from being transmitted to the binding post, preventing the binding post and a metal net lead or an external cable from being disconnected in connection or not in firm contact, and preventing the signal transmission from being affected.

Description

Technical Field

[0001] The utility model relates to the field of thermal resistors, in particular to a shock-resistant thermal resistor. Background Art

[0002] Thermal resistors are the most commonly used temperature detectors in the medium and low temperature range. Thermal resistor temperature measurement is based on the property that the resistance of a metal conductor increases with the increase of temperature. Its main features are high measurement accuracy and stable performance. Among them, the measurement accuracy of platinum thermal resistors is relatively high. It is not only widely used in industrial temperature measurement, but also made into a standard reference instrument.

[0003] At present, due to the high height of thermal resistor products, severe vibration will occur during the detection process. Excessive vibration amplitude will lead to inaccurate measurement accuracy, and the durability of the product will be reduced and the service life will be shortened under vibration. Utility Model Content

[0004] The purpose of the utility model is to provide a shock-resistant thermal resistor to solve the problems raised in the above background technology.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A seismic-resistant thermal resistor, comprising a sheath and a detection part, wherein the detection part comprises a junction box, wherein a groove is provided at the bottom of the junction box, wherein a hollow bolt is fixedly installed in the groove by a thread, wherein a chuck is fixedly provided at the lower end of the hollow bolt, wherein a movable nut is movably provided on the hollow bolt, wherein the movable nut is clamped by the chuck to prevent the movable nut from being separated from the hollow bolt, wherein the movable nut can be freely rotated on the hollow bolt without falling off, wherein a metal mesh wire is provided at the bottom of the junction box, wherein the metal mesh wire extends into the interior of the junction box, wherein the metal mesh wire is crimped with a hollow tube at the bottom of the movable nut, and wherein the bottom of the hollow tube is provided with a A thermal resistor, wherein the output end of the thermal resistor is connected to one end of the metal mesh wire, a ceramic plate is provided on the bottom wall of the inner cavity of the junction box, a terminal is provided on the ceramic plate, the other end of the metal mesh wire is connected to the terminal, and glue is poured at the bottom of the inner cavity of the junction box, and the height of the sealant exceeds the height of the ceramic plate, so that the ceramic plate can be wrapped as a whole, thereby reducing vibration transmission and protecting the product. The sheath includes a protective tube, and the outer wall of the protective tube is fixed with an installation thread, a fixing nut, and a connecting thread from top to bottom in sequence, and is connected to the device to be detected through the connecting thread, and the thread is adapted to the movable nut, and the two can be rotatably connected.

[0007] Preferably, a proper amount of thermal conductive silicone grease is poured between the thermal resistor and the inner wall of the hollow tube.

[0008] Preferably, a sealing cover is fixed on the junction box by bolts.

[0009] Preferably, the sealing cover may be made of a transparent material.

[0010] Preferably, a junction box plug is provided on the side of the junction box, and the external cable enters the interior of the junction box through the junction box plug to be connected to the terminal.

[0011] The advantages and positive effects of the utility model are:

[0012] 1. The utility model installs the sheath and the detection part together through a freely rotatable movable nut and a threaded connection. This connection method reduces the product height and vibration amplitude, increases the product life, and ensures product stability. At the same time, this connection method is faster when installed in a narrow space and does not affect the use and detection of the equipment;

[0013] 2. The utility model fills the inside of the junction box with sealant, and the sealant wraps the ceramic plate to prevent vibration from being transmitted to the terminal, causing the connection between the terminal and the metal mesh wire or the external cable to be disconnected or in loose contact, thereby affecting the transmission of the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall main structure of a seismic-resistant thermal resistor of the utility model;

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the central detection unit;

[0017] Figure 3 For this utility model Figure 1 Schematic diagram of the middle sheath structure;

[0018] Figure 4 For this utility model Figure 2 A is a schematic diagram of the enlarged structure;

[0019] Figure 5 For this utility model Figure 2 A schematic diagram of the internal enlarged structure at B in the middle;

[0020] Figure 6 For this utility model Figure 1 Schematic diagram on the left.

[0021] The marks in the accompanying drawings are described as follows: 10, sheath; 11, detection part; 12, protection tube; 13, connecting thread; 14, fixing nut; 15, movable nut; 16, junction box; 17, sealing cover; 18, junction box plug; 19, thread; 20, ceramic plate; 21, hollow tube; 22, metal mesh wire; 23, hollow bolt; 24, groove; 25, chuck; 26, terminal; 27, thermal resistor; 28, movable nut. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] Combine the following Figure 1-6 The utility model is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The view direction is consistent in front, back, left, right, up and down. Figure 1 It is a front view of the device of the utility model. Figure 1 The direction shown is consistent with the front, back, left, right, up and down directions of the device of the utility model when viewed from the front.

[0024] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0025] See also Figure 1-5The utility model provides an embodiment: a seismic thermal resistor, including a sheath 10 and a detection part 11, wherein the detection part 11 includes a junction box 16, wherein a groove 24 is provided at the bottom of the junction box 16, wherein the groove 24 is threadedly fixed to install a hollow bolt 23, wherein a chuck 25 is fixedly provided at the lower end of the hollow bolt 23, wherein a movable nut 28 is provided on the hollow bolt 23, wherein the movable nut 28 is clamped by the chuck 25 to prevent the movable nut 28 from being separated from the hollow bolt 23, wherein the movable nut 28 can be freely rotated on the hollow bolt 23 without falling off, wherein a metal mesh wire 22 is provided at the bottom of the junction box 16, wherein the metal mesh wire 22 extends into the interior of the junction box 16, wherein the metal mesh wire 22 is pressed against the hollow tube 21 at the bottom of the movable nut 28 A thermal resistor 27 is provided at the bottom of the hollow tube 21, and the output end of the thermal resistor 27 is connected to one end of the metal mesh wire 22. A ceramic plate 20 is provided on the bottom wall of the inner cavity of the junction box 16, and a terminal 26 is provided on the ceramic plate 20. The other end of the metal mesh wire 22 is connected to the terminal 26. The bottom of the inner cavity of the junction box 16 is filled with glue. The height of the sealant exceeds the height of the ceramic plate 20, and the terminal 26 can be wrapped as a whole, which reduces vibration transmission and protects the product. The sheath 10 includes a protective tube 12, and the outer wall of the protective tube 12 is fixed with an installation thread 19, a fixing nut 14, and a connecting thread 13 from top to bottom in sequence, and is connected to the device to be detected through the connecting thread 13. The thread 19 is adapted to the movable nut 28, and the two can be rotatably connected.

[0026] In addition, in one embodiment, a certain amount of thermal conductive silicone grease is poured between the thermal resistor 27 and the inner wall of the hollow tube 21 .

[0027] In addition, in one embodiment, a sealing cover 17 is fixed on the junction box 16 by bolts.

[0028] In addition, in one embodiment, the sealing cover 17 can be made of a transparent material.

[0029] In addition, in one embodiment, a junction box plug 18 is provided on the side of the junction box 16 , and the external cable enters the interior of the junction box 16 through the junction box plug 18 and is connected to the terminal 26 .

[0030] During the specific implementation; the detection part 11 on the rotating sheath 10 fixes the nut 14 to connect the connecting thread 13 with the device to be detected, and then the movable nut 15 is rotated to connect the movable nut 15 with the thread 19 on the sheath 10. Compared with the previous traditional method, the sheath 10 and the detection part 11 are connected together by the connection method of the movable nut 15 and the thread 19, which reduces the product height and vibration amplitude. At the same time, it is faster to install and is convenient for quick installation in a narrow space. After the sheath 10 and the detection part 11 are connected, the hollow tube 21 is located in the protective tube 12, and the thermal resistor 27 at the end of the hollow tube 21 is close to the protective tube 12, so that the data is measured more accurately. The measured data is connected to the external cable through the metal mesh wire 22 and the terminal 26. At the same time, the inside of the junction box 16 is filled with sealant, and the sealant wraps the ceramic plate 20 to prevent the vibration from being transmitted to the terminal 26, so that the connection between the terminal 26 and the metal mesh wire 22 or the external cable is broken or the contact is not firm, which affects the transmission of the signal.

[0031] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A seismic-resistant thermal resistor, comprising a sheath (10) and a detection unit (11), characterized in that: The detection unit (11) comprises a junction box (16), a groove (24) is provided at the bottom of the junction box (16), a hollow bolt (23) is fixedly installed in the groove (24) by means of a thread, a chuck (25) is fixedly provided at the lower end of the hollow bolt (23), a movable nut (28) is provided on the hollow bolt (23), and the movable nut (28) is freely rotatable on the hollow bolt (23), a metal mesh wire (22) is provided at the bottom of the junction box (16), the metal mesh wire (22) extends into the interior of the junction box (16), the metal mesh wire (22) is crimped with the hollow tube (21) at the bottom of the movable nut (28), a thermal resistor (27) is provided inside the hollow tube (21), and the thermal resistor (27) is provided inside the hollow tube (21). The output end of the resistor (27) is connected to one end of the metal mesh wire (22); a ceramic plate (20) is provided on the bottom wall of the inner cavity of the junction box (16); a terminal (26) is provided on the ceramic plate (20); the other end of the metal mesh wire (22) is connected to the terminal (26); the bottom of the inner cavity of the junction box (16) is filled with glue; the height of the sealant exceeds the height of the ceramic plate (20); the sheath (10) comprises a protective tube (12); an installation thread (19), a fixing nut (14), and a connecting thread (13) are fixed on the outer wall of the protective tube (12) from top to bottom in sequence; the protective tube is connected to the device to be detected through the connecting thread (13); the thread (19) is matched with the movable nut (28), and the two are rotatably connected.

2. The seismic-resistant thermal resistor according to claim 1, characterized in that: An appropriate amount of thermal conductive silicone grease is poured between the thermal resistor (27) and the inner wall of the hollow tube (21).

3. The seismic-resistant thermal resistor according to claim 1, characterized in that: A sealing cover (17) is fixed on the junction box (16) by means of bolts.

4. The seismic-resistant thermal resistor according to claim 3, characterized in that: The sealing cover (17) is made of transparent material.

5. The seismic-resistant thermal resistor according to claim 1, characterized in that: A junction box plug (18) is provided on the side of the junction box (16), and an external cable enters the interior of the junction box (16) through the junction box plug (18) and is connected to the terminal post (26).

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