A high-protection multifunctional explosion-proof temperature measuring device and its manufacturing method

Abstract

The invention discloses a high-protection multifunctional explosion-proof temperature measuring device and a manufacturing method thereof, comprising a shell, wherein the top of the shell is threadedly connected with a shell cover, the bottom of the shell is provided with a wire lead-in end, both sides of the shell are provided with cable lead-in ends, the bottom of the wire lead-in end is provided with a temperature measurement connection structure, a boss is provided inside the shell, an intelligent temperature transmitter is fixedly installed on the top of the boss, and a stud is provided on the top of the intelligent temperature transmitter. The invention adopts four-wire PW RTD platinum high-precision temperature sensing element, high-temperature resistant silicone potting, intelligent temperature transmitter module, stepped multi-stage sealing structure, universal connection structure and other measures to make the device have the advantages of high precision, large range, instantaneous response, extremely small temperature drift, low failure rate, long service life, high corrosion resistance, high shell strength, light weight, simple installation and fixation, and can be fixed at any angle.

Description

Technical Field

[0001] The invention belongs to the field of temperature measuring devices, and specifically relates to a high-protection multifunctional explosion-proof temperature measuring device and a manufacturing method thereof. Background Art

[0002] In current life, explosion-proof temperature measuring devices are mainly used to monitor the temperature of various gases, liquids, solids and other media in flammable and explosive hazardous places in real time. According to the characteristics of the medium and process requirements, the installation positions of explosion-proof temperature measuring devices are different. For example, some need to be installed at the bottom of the tank and completely immersed in the medium, and some need to be installed on the pipeline to be exposed outdoors and also need to display the temperature locally. The existing explosion-proof temperature measuring devices are mainly divided into three-wire and four-wire systems. Among them, the three-wire system only has the temperature measurement function. The monitored temperature needs to be checked in the main control room of the background. The measurement accuracy deviation is 0.3℃, and the temperature measurement range is -40℃ to +600℃. Since the temperature signal needs to be transmitted to the background, it is easily interfered, resulting in a large temperature drift. The applicable ambient temperature range is -20℃ to +40℃; the four-wire system has a temperature display function, the measurement accuracy deviation is 0.15℃, and the temperature measurement range is -40℃ to +500℃. Since the temperature is displayed on a liquid crystal panel, the applicable ambient temperature range is only 0℃ to +40℃.

[0003] From the above content, it can be seen that the existing explosion-proof temperature measuring devices have the disadvantages of low measurement accuracy, small temperature measurement range, small applicable ambient temperature range, large temperature drift, etc.; there are also low protection and anti-corrosion levels, with protection only IP65 and anti-corrosion only WF1, so they cannot meet the requirements of outdoor oil pipelines and chemical plant pipelines; there are also disadvantages of high failure rate and short service life, because the wires of the temperature sensing element in the protective tube are not isolated, and magnesium oxide is used for potting, but magnesium oxide can easily absorb moisture, resulting in inaccurate temperature measurement or even failure to measure temperature; there is also the disadvantage of inconvenient installation and fixation, because the flange plate is used for fixed connection, which requires the installation of multiple screws, resulting in a relatively large total weight of the product. Summary of the invention

[0004] The purpose of the present invention is to provide a high-protection multifunctional explosion-proof temperature measuring device and a manufacturing method thereof in order to solve the above-mentioned problems, thereby solving the problems mentioned in the background technology.

[0005] In order to solve the above problems, the present invention provides a technical solution:

[0006] A high-protection multifunctional explosion-proof temperature measuring device, comprising a shell, the top of the shell is threadedly connected to a shell cover, the bottom of the shell is provided with a wire lead-in end, both sides of the shell are provided with cable lead-in ends, the bottom of the wire lead-in end is provided with a temperature measurement connection structure, a boss is provided inside the shell, an intelligent temperature transmitter is fixedly installed on the top of the boss, a stud is provided on the top of the intelligent temperature transmitter, a digital tube display module is connected to the top of the stud by screws, a heating wire is integrated on the top of the digital tube display module, a pressing block is provided on the top of the shell and inside the shell cover, and the top of the pressing block is connected to the top of the inner wall of the shell cover A glass window is arranged between them, a positioning groove is arranged on the outside of the shell and above the cable introduction end, a tightening screw is arranged on the bottom of the shell cover, and one end of the tightening screw extends to the inside of the positioning groove, a sealing ring is arranged inside the cable introduction end, and the end of the cable introduction end away from the shell is connected with a clamping joint through a thread, a stepped groove is arranged inside the clamping joint, and a sheath spring is arranged on the end of the outer side of the clamping joint away from the cable introduction end, a signal cable and a power cable are fixedly installed inside the two clamping joints respectively, and one end of the signal cable and the power cable are electrically connected to the intelligent temperature transmitter.

[0007] Preferably, the temperature measuring connection structure includes a fixed joint, the internal thread of the wire introduction end is connected with a fixed joint, a universal joint is arranged on the outer side of the bottom of the fixed joint, a connecting joint is arranged inside the universal joint, a protective tube is inserted inside the fixed joint, the bottom of the protective tube extends to the bottom of the connecting joint, a temperature measuring end is fixedly connected to the bottom of the protective tube, a temperature sensing element is fixed at the lower end of the temperature measuring end, a fan-shaped partition plate is fixedly connected to the upper end of the temperature measuring end, the partition plate is provided with four hollow holes, and limit holes are provided on the partition plate and between two adjacent hollow holes, and the four wires of the temperature sensing element pass through the corresponding limit holes and are electrically connected to the intelligent temperature transmitter.

[0008] Preferably, a No. 3 sealing gasket is arranged equidistantly between the outer side of the shell top and the inner wall of the shell cover.

[0009] Preferably, a gasket is provided inside the cable lead-in end and between the sealing ring and the compression joint, and a No. 4 sealing gasket is provided outside the compression joint and on one side of the cable lead-in end.

[0010] Preferably, four countersunk holes are evenly distributed on the top of the shell cover.

[0011] Preferably, the interior of the protection tube is filled with high temperature resistant silicone.

[0012] Preferably, the interior of the temperature measuring end is filled with high-performance thermally conductive silica gel.

[0013] Preferably, a No. 1 sealing gasket is provided inside the wire lead-in end and located on one side of the fixed joint, and a No. 2 sealing gasket is provided outside the fixed joint and located below the wire lead-in end.

[0014] Preferably, the shell and the shell cover are both made of aviation aluminum.

[0015] A method for manufacturing a high-protection multifunctional explosion-proof temperature measuring device comprises the following steps:

[0016] S1. First, fix the temperature measuring end at the bottom of the protection tube, fix the temperature sensing element at the lower end of the temperature measuring end and pass its wire through the limiting hole of the partition plate, then fill the high-performance thermal conductive silicone inside the temperature measuring end and the protection tube with high-temperature resistant silicone in turn, then assemble the fixed joint, universal joint and connecting joint, after the assembly is completed, insert the top of the fixed joint into the inside of the wire introduction end, and insert the top of the protection tube into the inside of the fixed joint for assembly, and extend the wire of the temperature sensing element inside the temperature measuring end into the inside of the shell, and then connect the wire to the intelligent temperature transmitter;

[0017] S2. At the same time, the signal cable and the power cable are respectively inserted into the corresponding compression joints, and then the compression joints are respectively screwed into the corresponding cable lead-in ends and tightened, and then the high-temperature resistant silicone is potted inside the compression joints, and a sheath spring is provided at the end of the outer side of the compression joint away from the cable lead-in end, and at the same time, the signal cable and the power cable are respectively electrically connected to the intelligent temperature transmitter;

[0018] S3. Then install the intelligent temperature transmitter on the top of the boss with screws, and then install the digital tube display module on the studs on the top of the intelligent temperature transmitter, then place the glass window on the top of the shell cover, and fill the gap between the glass window and the inner wall of the shell cover with high-temperature resistant silicone, then install the clamping block inside the shell cover and clamp the glass window, then connect and fix the shell cover to the top thread of the shell, and then screw the tightening screws at the bottom of the shell cover into the positioning groove of the shell and tighten it, and the manufacturing of the equipment is completed at this time.

[0019] The beneficial effects of the present invention are:

[0020] 1. By adopting four-wire PW RTD platinum high-precision temperature sensing elements, industrial silver wires, and temperature measuring sections filled with high-performance thermal conductive silicone, it has the advantages of high measurement accuracy with a maximum deviation of 0.1°C, a large temperature measurement range of -200°C to +850°C, a short response time of no more than 1 second, and a temperature drift of no more than 0.1%.

[0021] 2. By setting a partition in the protective tube, adopting high-temperature resistant silicone encapsulation and other measures, and using 321 stainless steel, the four wires of the temperature sensing element will not short-circuit or absorb moisture, and have the advantages of low failure rate and long service life.

[0022] 3. By adopting low-temperature intelligent temperature transmitter module, low-temperature digital tube display module and other measures, it has the functions of temperature display, fault diagnosis and alarm, wide power supply voltage input and other functions, and can be used in an extremely low temperature environment of -60℃.

[0023] 4. By adopting aviation aluminum material, hard anodizing, resin powder spraying and other surface treatment processes, it achieves the advantages of light weight, high strength, and high corrosion resistance levels of WF2 and CM-5.

[0024] 5. By adopting the stepped multi-level sealing structure, silicone potting and other measures, the high protection level of IP68 is achieved, it can be used 20 meters underwater, and nano-level dust cannot enter the shell.

[0025] 6. By adopting the universal connection structure, the advantages of simple installation and fixation and the ability to fix the shell at any angle of 360° are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 2 is a top view of the present invention;

[0029] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0030] Figure 4 It is a schematic diagram of the structure of the partition plate of the present invention.

[0031] In the figure: 1, shell; 2, shell cover; 3, wire lead-in terminal; 4, cable lead-in terminal; 5, temperature measurement connection structure; 51, fixed joint; 52, No. 1 sealing gasket; 53, No. 2 sealing gasket; 54, universal joint; 55, connecting joint; 56, protection tube; 57, temperature sensing element; 58, partition plate; 59, high-performance thermal conductive silicone; 510, hollow hole; 511, limit hole; 512, temperature measurement terminal; 513, high temperature resistant silicone; 6. Boss; 7. Intelligent temperature transmitter; 8. Stud; 9. Digital tube display module; 10. Clamping block; 11. Glass window; 12. No. 3 sealing gasket; 13. Sealing ring; 14. Heating wire; 15. Clamping joint; 151. Step groove; 16. Gasket; 17. No. 4 sealing gasket; 18. Sheath spring; 19. Signal cable; 20. Power cable; 21. Countersunk hole; 22. Tightening screw; 23. Positioning groove. DETAILED DESCRIPTION

[0032] like Figure 1-4 As shown, this specific implementation adopts the following technical solutions:

[0033] Example:

[0034] A high-protection multifunctional explosion-proof temperature measuring device comprises a shell 1, the top of the shell 1 is threadedly connected with a shell cover 2 and tightened, and then the tightening screw 22 at the bottom of the shell cover 2 is screwed into the positioning groove 23 of the shell 1 and tightened, which can effectively ensure that the shell cover 2 will not loosen when the temperature changes frequently or the shell 1 vibrates, so that the shell cover 2 can better seal the top of the shell 1; a wire lead-in terminal 3 is arranged at the bottom of the shell 1, cable lead-in terminals 4 are arranged on both sides of the shell 1, a temperature measurement connection structure 5 is arranged at the bottom of the wire lead-in terminal 3, a boss 6 is arranged inside the shell 1, and an intelligent temperature transmitter 7 is fixedly installed on the top of the boss 6. The intelligent temperature transmitter 7 adopts Emerson's 248 series HART intelligent temperature transmitter module, which can be used for ambient temperature The range is -60℃ to +60℃, the MODBUS communication protocol has RS485 communication function, and it can also output 4 to 20mA DC signals. The power supply is a wide voltage of 12 to 36VDC. It also has a fault diagnosis function, which can detect the fault of the temperature sensing element 57 and then issue an alarm; a stud 8 is arranged on the top of the intelligent temperature transmitter 7, and the stud 8 is fixed with a digital tube display module 9 by screws. The digital tube display module 9 uses a five-digit digital tube to display the temperature value. First, a digital tube display circuit is designed, and electronic components such as capacitors, resistors, and digital tubes that are resistant to low temperatures of -20℃ are used and then integrated on a PCB circuit board; a heating wire 14 is integrated on the top of the digital tube display module 9, and the diameter of the heating wire 14 is 0.6mm, the maximum The maximum heating power is 2W, and it is arranged in an S shape under the digital tube, and then copper is covered on its surface, which can effectively improve the heat dissipation efficiency and make the heat dissipation more uniform; a glass window 11 is arranged on the top of the shell 1 and inside the shell cover 2, and a clamping block 10 is arranged under the glass window 11. The glass window 11 is convenient for better observation of the displayed temperature. At the same time, the glass window 11 is made of high borosilicate tempered glass with a thickness of 15mm, which can withstand 2MPa water pressure and 4J energy impact. It is bonded and fixed with high-temperature resistant silicone, which can effectively ensure the sealing. At the same time, the clamping block 10 is made of aviation aluminum and is hard anodized. After tightening, the glass window 11 can be further fixed, which can effectively ensure that the glass is in a state of constant temperature when the temperature changes frequently or drastically. The viewing window 11 is not loose; a sealing ring 13 is provided inside the cable lead-in end 4, and a clamping joint 15 connected by a thread is provided at one end of the cable lead-in end 4 away from the shell 1, and a sheath spring 18 is provided on the outer side of the clamping joint 15 away from the cable lead-in end 4. A signal cable 19 and a power cable 20 are fixedly installed inside the two clamping joints 15 respectively, and one end of the signal cable 19 and the power cable 20 are electrically connected to the intelligent temperature transmitter 7. A stepped groove 151 is provided inside the clamping joint 15, and the interior of the clamping joint 15 is filled with high-temperature resistant silicone. The stepped groove 151 and the sheath spring 18 can effectively ensure that the cable will not be separated from the high-temperature resistant silicone when being pulled or bent, thereby effectively ensuring the sealing of the shell.

[0035] The temperature measuring connection structure 5 includes a fixed joint 51, the internal thread of the wire introduction end 3 is connected with the fixed joint 51, a universal joint 54 is arranged on the outside of the bottom of the fixed joint 51, a connecting joint 55 is arranged inside the universal joint 54, a protective tube 56 is inserted inside the fixed joint 51, the protective tube 56 is welded and fixed to the fixed joint 51 by a argon arc welding full welding process, the bottom of the protective tube 56 extends to the bottom of the connecting joint 55, the bottom of the protective tube 56 is fixedly connected with a temperature measuring end 512 by a argon arc welding full welding process, and the temperature measuring end 512 is High-performance thermally conductive silicone 59 is encapsulated inside, a temperature sensing element 57 is fixed at the lower end of the temperature measuring end 512, a fan-shaped partition plate 58 is fixedly connected to the upper end of the temperature measuring end 512, and the partition plate 58 is evenly distributed with four hollow holes 510, and the partition plate 58 is provided with a limiting hole 511 between two adjacent hollow holes 510, and four wires of the temperature sensing element 57 pass through the corresponding limiting holes 511 and are electrically connected to the intelligent temperature transmitter 7. By setting the temperature measuring connection structure 5, it is convenient to better install the temperature sensing element 57 at the bottom of the shell 1.

[0036] Among them, No. 3 sealing gaskets 12 are equidistantly arranged between the outer side of the top of the shell 1 and the inner wall of the shell cover 2. By arranging three No. 3 sealing gaskets 12 at different heights and different outer diameters, a stepped multi-level sealing structure is formed. In this way, the channel for the medium to enter the equipment is in the shape of a "J". The resistance will increase exponentially. It is first blocked by the first two No. 3 sealing gaskets 12, and then blocked by the locking threads of the shell 1 and the shell cover 2. The gap between the threads is in an "S" shape. At this time, the resistance increases geometrically and is finally blocked by the third No. 3 sealing gasket 12. Through these four levels of protection, the overall sealing of the equipment can be effectively guaranteed.

[0037] Among them, a positioning groove 23 is arranged above the cable entry end 4 of the shell 1, and a tightening screw 22 is arranged at the bottom of the shell cover 2. After the shell cover 2 is tightened on the top thread of the shell 1, the tightening screw 22 can just align with the positioning groove 23, indicating that the shell cover 2 has been tightened into place, so that the No. 3 sealing gasket 12 is fully compressed, thereby effectively ensuring that the shell cover 2 is sealed to the top of the shell 1, and at the same time, it can also effectively ensure that the shell cover 2 will not loosen when the temperature changes frequently or the shell 1 vibrates.

[0038] Among them, a gasket 16 is arranged inside the cable lead-in end 4 and between the sealing ring 13 and the clamping joint 15, so that the contact area between the clamping joint 15 and the sealing ring 13 is larger, ensuring a better clamping effect of the sealing ring 13 and thus providing sealing. A No. 4 sealing pad 17 is arranged on the outside of the clamping joint 15 and on one side of the cable lead-in end 4, so as to better ensure the sealing of the cable lead-in end 4.

[0039] Among them, four countersunk holes 21 are evenly distributed on the top of the shell cover 2, which are used to fix the wrench for tightening the shell cover 2, and at the same time some aviation aluminum materials can be saved.

[0040] Among them, a stepped groove 151 is provided inside the compression joint 15, and the interior of the compression joint 15 is filled with high-temperature resistant silicone. The stepped groove 151 and the sheath spring 18 can effectively ensure that the cable will not separate from the high-temperature resistant silicone when it is pulled or bent, thereby effectively ensuring the sealing of the outer shell.

[0041] Among them, the interior of the protection tube 56 is filled with high-temperature resistant silicone 513. By filling the high-temperature resistant silicone 513, it can effectively ensure that the four wires and the inner wall of the protection tube 56 will not be too close or contact in a vibration environment, resulting in a short circuit and failure, and it can also effectively ensure that the interior of the protection tube 56 will not absorb moisture.

[0042] Among them, a No. 1 sealing gasket 52 is arranged inside the wire introduction end 3 and on one side of the fixed joint 51, and a No. 2 sealing gasket 53 is arranged outside the fixed joint 51 and below the wire introduction end 3, so as to better ensure the sealing of the wire introduction end 3.

[0043] Among them, the shell 1 and the shell cover 2 are both made of aviation aluminum. At the same time, the shell 1 and the shell cover 2 are made by high-pressure casting mold forming process, which can effectively ensure that the equipment is light in weight and high in strength. At the same time, the shell cover 2 and the shell 1 are first treated with hard anodizing process, and the hard anodizing thickness is 0.02mm. This measure has two functions. First, it can effectively improve the surface hardness of the shell, and then improve the rigidity of the shell, so as to ensure that it can withstand 2MPa water pressure. Second, it can effectively prevent the adverse effects of corrosive media and ultraviolet rays from the sun. Then the surface is treated with resin powder spraying process with a spraying thickness of 0.15mm, so as to further improve the corrosion resistance and UV resistance of the shell. Therefore, it can be used in WF2 outdoor strong corrosion environment and CM-5 marine strong corrosion environment.

[0044] A method for manufacturing a high-protection multifunctional explosion-proof temperature measuring device comprises the following steps:

[0045] S1. First, fix the temperature measuring end 512 at the bottom of the protective tube 56, fix the temperature sensing element 57 at the lower end inside the temperature measuring end 512, and fix the fan-shaped partition plate 58 at the upper end of the temperature measuring end 512. Pass the wire of the temperature sensing element 57 through the limiting hole 511 of the partition plate 58, and then fill the high-performance thermal conductive silicone 59 inside the temperature measuring end 512 and the high-temperature resistant silicone 513 inside the protective tube 56 in turn, and then assemble the fixed joint 51, the universal joint 54 and the connecting joint 55. After the assembly is completed, insert the top of the fixed joint 51 into the inside of the wire introduction end 3, and insert the top of the protective tube 56 into the inside of the fixed joint 51 for assembly, and extend the wire of the temperature sensing element 57 inside the temperature measuring end 512 into the inside of the shell 1, and then connect the wire to the intelligent temperature transmitter 7;

[0046] S2. At the same time, the signal cable 19 and the power cable 20 are respectively inserted into the corresponding compression joints 15, and then the compression joints 15 are respectively screwed into the corresponding cable lead-in ends 4 and tightened, and then the high-temperature resistant silica gel 513 is potted in the compression joints 15, and a sheath spring 18 is provided at the outer end of the compression joints 15 away from the cable lead-in end 4, and at the same time, the signal cable 19 and the power cable 20 are respectively electrically connected to the intelligent temperature transmitter 7;

[0047] S3. Then install the intelligent temperature transmitter 7 on the top of the boss 6 by screws, and then install the digital tube display module 9 on the stud 8 on the top of the intelligent temperature transmitter 7, then place the glass window 11 on the top of the shell cover 2, and fill the gap between the glass window 11 and the inner wall of the shell cover 2 with high temperature resistant silica gel 513, then install the clamping block 10 inside the shell cover 2 and clamp the glass window 11, then tighten the shell cover 2 and the top thread of the shell 1, and then screw the tightening screw 22 into the positioning groove 23 of the shell 1 and tighten it. At this time, the manufacturing of the equipment can be completed.

[0048] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0050] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-protection multifunctional explosion-proof temperature measuring device, characterized in that: The invention comprises a shell (1), wherein the top of the shell (1) is threadedly connected to a shell cover (2), the bottom of the shell (1) is provided with a wire lead-in end (3), both sides of the shell (1) are provided with cable lead-in ends (4), the bottom of the wire lead-in end (3) is provided with a temperature measurement connection structure (5), a boss (6) is provided inside the shell (1), an intelligent temperature transmitter (7) is fixedly installed on the top of the boss (6), a stud (8) is provided on the top of the intelligent temperature transmitter (7), the top of the stud (8) is connected to a digital tube display module (9) by screws, the top of the digital tube display module (9) is integrated with a heating wire (14), a pressing block (10) is provided at the top of the shell (1) and located inside the shell cover (2), and a glass window (11) is provided between the top of the pressing block (10) and the top of the inner wall of the shell cover (2). ), a positioning groove (23) is provided on the outer side of the shell (1) and above the cable lead-in end (4), a tightening screw (22) is provided at the bottom of the shell cover (2), and one end of the tightening screw (22) extends to the inside of the positioning groove (23), a sealing ring (13) is provided inside the cable lead-in end (4), the end of the cable lead-in end (4) away from the shell (1) is connected to a clamping joint (15) by threading, the inside of the clamping joint (15) is provided with a stepped groove, the end of the outer side of the clamping joint (15) away from the cable lead-in end (4) is provided with a sheath spring (18), the inside of the two clamping joints (15) are respectively fixed with a signal cable (19) and a power cable (20), and one end of the signal cable (19) and the power cable (20) are electrically connected to the intelligent temperature transmitter (7); The temperature measuring connection structure (5) comprises a fixed joint (51), the internal thread of the wire introduction end (3) is connected to the fixed joint (51), a universal joint (54) is arranged on the outside of the bottom of the fixed joint (51), a connecting joint (55) is arranged inside the universal joint (54), a protective tube (56) is inserted inside the fixed joint (51), the bottom of the protective tube (56) extends to the bottom of the connecting joint (55), and the bottom of the protective tube (56) is fixedly connected to the temperature measuring An end (512) is provided, a temperature sensing element (57) is fixed at the lower end of the temperature measuring end (512), a fan-shaped partition plate (58) is fixedly connected to the upper end of the temperature measuring end (512), the partition plate (58) is provided with four hollow holes (510), and a limiting hole (511) is provided on the partition plate (58) and between two adjacent hollow holes (510), and four wires of the temperature sensing element (57) pass through the corresponding limiting holes (511) and are electrically connected to the intelligent temperature transmitter (7); A No. 3 sealing gasket (12) is arranged equidistantly between the outer side of the top of the shell (1) and the inner wall of the shell cover (2).

2. A high-protection multifunctional explosion-proof temperature measuring device according to claim 1, characterized in that: A gasket (16) is provided inside the cable lead-in end (4) and between the sealing ring (13) and the compression joint (15), and a No. 4 sealing gasket (17) is provided outside the compression joint (15) and on one side of the cable lead-in end (4).

3. A high-protection multifunctional explosion-proof temperature measuring device according to claim 1, characterized in that: Four countersunk holes (21) are evenly distributed on the top of the shell cover (2).

4. The high-protection multifunctional explosion-proof temperature measuring device according to claim 1 is characterized in that: The interior of the protection tube (56) is filled with high temperature resistant silica gel (513).

5. The high-protection multifunctional explosion-proof temperature measuring device according to claim 1 is characterized in that: The temperature measuring end (512) is internally potted with high-performance thermally conductive silica gel (59).

6. A high-protection multifunctional explosion-proof temperature measuring device according to claim 1, characterized in that: A first sealing pad (52) is provided inside the wire lead-in end (3) and located on one side of the fixed joint (51), and a second sealing pad (53) is provided outside the fixed joint (51) and located below the wire lead-in end (3).

7. The high-protection multifunctional explosion-proof temperature measuring device according to claim 1 is characterized in that: The shell (1) and the shell cover (2) are both made of aviation aluminum.

8. A method for manufacturing a high-protection multifunctional explosion-proof temperature measuring device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. First, a temperature measuring end (512) is fixedly connected to the bottom of the protective tube (56), and a temperature sensing element (57) is fixed to the lower end of the temperature measuring end (512) and its wire is passed through the limiting hole (511) of the partition plate (58). Then, high-performance thermal conductive silicone (59) is filled inside the temperature measuring end (512) and high-temperature resistant silicone (513) is filled inside the protective tube (56) in sequence. Then, the fixed joint (51), the universal joint (54) and the connecting joint (55) are assembled. After the assembly is completed, the top of the fixed joint (51) is inserted into the inside of the wire introduction end (3), and the top of the protective tube (56) is inserted into the inside of the fixed joint (51) for assembly. The wire of the temperature sensing element (57) inside the temperature measuring end (512) is extended into the inside of the housing (1), and then the wire is connected to the intelligent temperature transmitter (7); S2. At the same time, the signal cable (19) and the power cable (20) are respectively inserted into the corresponding compression joints (15), and then the compression joints (15) are respectively screwed into the corresponding cable lead-in ends (4) and tightened, and then the compression joints (15) are filled with high-temperature resistant silicone (513), and a sheath spring (18) is provided on the outer side of the compression joint (15) away from the cable lead-in end (4), and at the same time, the signal cable (19) and the power cable (20) are respectively electrically connected to the intelligent temperature transmitter (7); S3. Then, the intelligent temperature transmitter (7) is installed on the top of the boss (6) by means of screws, and then the digital tube display module (9) is installed on the stud (8) on the top of the intelligent temperature transmitter (7). Then, the glass window (11) is placed on the top of the inside of the shell cover (2), and the gap between the glass window (11) and the inner wall of the shell cover (2) is filled with high-temperature resistant silica gel (513). Then, a pressing block (10) is installed inside the shell cover (2) and the glass window (11) is pressed tightly. Then, the shell cover (2) is connected and fixed to the top thread of the shell body (1), and then the tightening screw (22) at the bottom of the shell cover (2) is screwed into the positioning groove (23) of the shell body (1) and tightened. At this time, the manufacture of the device is completed.

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