CN112903131A - High-protection multifunctional explosion-proof temperature measuring device and manufacturing method thereof - Google Patents

Abstract

The invention discloses a high-protection multifunctional explosion-proof temperature measuring device and a manufacturing method thereof, wherein the device comprises a shell, the top of the shell is in threaded connection with a shell cover, the bottom of the shell is provided with a lead-in end, two sides of the shell are respectively provided with a cable-in end, the bottom of the lead-in end is provided with a temperature measuring connection structure, the inside of the shell is provided with a boss, the top of the boss is fixedly provided with an intelligent temperature transmitter, and the top of the intelligent temperature transmitter is provided with a stud Light weight, simple installation and fixation and can be fixed at any angle.

Description

High-protection multifunctional explosion-proof temperature measuring device and manufacturing method thereof

Technical Field

The invention belongs to the field of temperature measuring devices, and particularly relates to a high-protection multifunctional explosion-proof temperature measuring device and a manufacturing method thereof.

Background

In the existing life, the explosion-proof temperature measuring device is mainly used for monitoring the temperature of various gases, liquids, solids and other media in flammable and explosive dangerous places in real time, the positions where the explosion-proof temperature measuring device is installed are different according to the characteristics of the media and the process requirements, for example, some of the explosion-proof temperature measuring devices need to be installed at the bottom of a tank body and completely immersed in the media, and some of the explosion-proof temperature measuring devices need to be installed on a pipeline and exposed outdoors and simultaneously need to locally display. The existing explosion-proof temperature measuring device is mainly divided into a three-wire system and a four-wire system, wherein the three-wire system only has a temperature measuring function, the monitored temperature needs to be checked in a master control chamber of a background, the deviation of the measurement precision is 0.3 ℃, the temperature measuring range is from minus 40 ℃ to plus 600 ℃, and a temperature signal needs to be transmitted to the background, so that the temperature drift is very large due to interference, and the applicable environment temperature range is from minus 20 ℃ to plus 40 ℃; the four-wire system has the temperature display function, the measurement precision deviation is 0.15 ℃, the temperature measurement range is-40 ℃ to +500 ℃, and the liquid crystal panel is adopted to display the temperature, so the applicable environment temperature range is only 0 ℃ to +40 ℃.

The above contents show that the existing explosion-proof temperature measuring device has the defects of low measurement precision, small temperature measuring range, small applicable environment temperature range, large temperature drift and the like; the protection and corrosion prevention grade is low, the protection is only IP65, and the corrosion prevention is only WF1, so the use requirements of outdoor oil pipelines and chemical plant pipelines cannot be met; the defects of high failure rate and short service life exist, because the lead of the temperature sensing element in the protection tube is not isolated and is encapsulated by magnesium oxide, the magnesium oxide can easily absorb moisture, and the temperature measurement is inaccurate or even can not be carried out; the disadvantage of inconvenient installation and fixation exists, because the flange plate is adopted for fixed connection, a plurality of screws are required to be installed, and the total weight of the product is larger.

The invention content is as follows:

the invention aims to solve the problems in the prior art by providing a high-protection multifunctional explosion-proof temperature measuring device and a manufacturing method thereof.

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

a high-protection multifunctional explosion-proof temperature measuring device comprises a shell, wherein the top of the shell is in threaded connection with a shell cover, a lead introduction end is arranged at the bottom of the shell, cable introduction ends are arranged on two sides of the shell, a temperature measuring connecting structure is arranged at the bottom of the lead introduction end, a boss is arranged inside the shell, an intelligent temperature transmitter is fixedly arranged at the top of the boss, a stud is arranged at the top of the intelligent temperature transmitter, the top of the stud is connected with a nixie tube display module through a screw, a heating wire is integrated at the top of the nixie tube display module, a pressing block is arranged at the top of the shell and inside the shell cover, a glass window is arranged between the top of the pressing block and the top of the inner wall of the shell cover, a positioning groove is arranged outside the shell and above the cable introduction end, and a jacking, one end of the jacking screw extends to the inside of the positioning groove, a sealing ring is arranged inside the cable leading-in end, one end, far away from the shell, of the cable leading-in end is connected with a compression joint through threads, a stepped groove is formed inside the compression joint, one end, far away from the cable leading-in end, outside the compression joint is provided with a sheath spring, a signal cable and a power cable are fixedly arranged inside the two compression joints respectively, and one ends of the signal cable and the power cable are electrically connected with the intelligent temperature transmitter.

Preferably, the temperature measurement connection structure includes a fixed joint, the inside threaded connection of wire leading-in end has a fixed joint, the outside of fixed joint bottom is provided with universal joint, universal joint's inside is provided with attach fitting, the protection tube has been inserted to fixed joint's inside, the bottom of protection tube extends to attach fitting's below, the bottom fixedly connected with temperature measurement end of protection tube, the inside lower extreme of temperature measurement end is fixed with temperature sensing element, the division board of temperature measurement end upper end fixedly connected with flabellum shape, four fretwork holes have been laid to the division board, just be located on the division board and all be equipped with spacing hole between two adjacent fretwork holes, four wires of temperature sensing element run through corresponding spacing hole and with intelligent temperature transmitter electric connection.

Preferably, a third sealing gasket is arranged between the outer side of the top of the shell and the inner wall of the shell cover at equal intervals.

Preferably, a gasket is arranged inside the cable leading-in end and between the sealing ring and the compression joint, and a fourth sealing gasket is arranged outside the compression joint and on one side of the cable leading-in end.

Preferably, four counter bores are uniformly distributed at the top of the shell cover.

Preferably, the protection tube is internally filled with high-temperature-resistant silica gel.

Preferably, the temperature measuring end is internally encapsulated with high-performance heat-conducting silica gel.

Preferably, a first sealing gasket is arranged inside the lead-in end and on one side of the fixed joint, and a second sealing gasket is arranged outside the fixed joint and below the lead-in end.

Preferably, the shell and the shell cover are both made of aviation aluminum materials.

A manufacturing method of a high-protection multifunctional explosion-proof temperature measuring device comprises the following steps:

s1, firstly, fixedly connecting a temperature measuring end at the bottom of a protection tube, fixing a temperature sensing element at the lower end in the temperature measuring end and enabling a lead of the temperature sensing element to penetrate out of a spacing hole of a partition plate, then sequentially filling high-performance heat-conducting silica gel in the temperature measuring end and high-temperature-resistant silica gel in a protection tube, then assembling a fixed joint, a universal joint and a connecting joint, inserting the top of the fixed joint into the lead-in end after the assembly is finished, simultaneously inserting the top of the protection tube into the fixed joint for assembly, extending the lead of the temperature sensing element in the temperature measuring end into the shell, and then connecting the lead with an intelligent temperature transmitter;

s2, simultaneously, inserting the signal cable and the power cable into the corresponding compression joints respectively, screwing the compression joints into the corresponding cable leading-in ends respectively and screwing the compression joints, embedding high-temperature-resistant silica gel into the compression joints, arranging sheath springs at one ends of the outer sides of the compression joints, which are far away from the cable leading-in ends, and electrically connecting the signal cable and the power cable with the intelligent temperature transmitter respectively;

s3, pass through the top of screw installation at the boss with intelligent temperature transmitter after that, then install charactron display module on the double-screw bolt at intelligent temperature transmitter top, place the top at the cap inside with the glass window after that, and at its gap department embedment high temperature resistant silica gel with the cap inner wall of glass window, then compress tightly the glass window at cap internally mounted compact heap, then connect the top screw thread of fixing at the casing with the cap, then screw in the positioning groove of casing and screw with the top of cap bottom, can accomplish the manufacturing to equipment this moment.

The invention has the beneficial effects that:

1. by adopting the measures of a four-wire PW RTD platinum high-precision temperature sensing element, an industrial silver wire, high-performance heat-conducting silica gel filled in a temperature measuring section and the like, the temperature measuring device has the advantages of high measuring precision, maximum deviation of 0.1 ℃, wide temperature measuring range of-200 ℃ to +850 ℃, short response time of not more than 1 second and small temperature drift of not more than 0.1 percent.

2. Through the arrangement of the partition plate in the protection pipe, the measures of high-temperature-resistant silica gel encapsulation and the like and the adoption of 321 stainless steel materials, the four leads of the temperature sensing element cannot be short-circuited and cannot suck moisture, and the temperature sensing element has the advantages of low failure rate and long service life.

3. By adopting the measures of the low-temperature intelligent temperature transmitter module, the low-temperature nixie tube display module and the like, the temperature display, fault diagnosis and alarm, wide power supply voltage input and the like have the advantages of use in the extremely low temperature environment of minus 60 ℃.

4. By adopting surface treatment processes such as aviation aluminum material, hard anodic oxidation, resin powder spraying and the like, the advantages of light weight, high strength and high corrosion resistance of WF2 and CM-5 are realized.

5. Through adopting measures such as step multistage seal structure, silica gel embedment, realized IP68 high protection level, can be used for 20 meters under water, the unable advantage that gets into the shell of nanometer dust.

6. By adopting the measure of the universal connection structure, the advantages of simple installation and fixation and capability of fixing the shell at any angle of 360 degrees are realized.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 1;

fig. 4 is a schematic view of the divider plate structure of the present invention.

In the figure: 1. a housing; 2. a shell cover; 3. a lead-in end; 4. a cable lead-in; 5. a temperature measurement connecting structure; 51. fixing the joint; 52. a first sealing gasket; 53. a second sealing gasket; 54. a universal joint; 55. connecting a joint; 56. protecting the tube; 57. a temperature sensing element; 58. a partition plate; 59. high performance thermally conductive silica gel; 510. hollowing out holes; 511. a limiting hole; 512. a temperature measuring end; 513. high temperature resistant silica gel; 6. a boss; 7. an intelligent temperature transmitter; 8. a stud; 9. a nixie tube display module; 10. a compression block; 11. a glass window; 12. a third sealing gasket; 13. a seal ring; 14. heating wires; 15. compressing the joint; 151. a stepped recess; 16. a gasket; 17. a fourth gasket; 18. a sheath spring; 19. a signal cable; 20. a power cable; 21. a counter bore; 22. jacking the screw tightly; 23. a positioning groove.

The specific implementation mode is as follows:

as shown in fig. 1 to 4, the following technical solutions are adopted in the present embodiment:

example (b):

a high-protection multifunctional explosion-proof temperature measuring device comprises a shell 1, wherein the top of the shell 1 is in threaded connection with a shell cover 2 and is screwed, and then a jacking screw 22 at the bottom of the shell cover 2 is screwed into a positioning groove 23 of the shell 1 and is screwed, so that the shell cover 2 can be effectively prevented from loosening when the temperature changes frequently or the shell 1 vibrates, and the shell cover 2 can be better sealed on the top of the shell 1; the bottom of the shell 1 is provided with a lead-in end 3, both sides of the shell 1 are provided with cable lead-in ends 4, the bottom of the lead-in end 3 is provided with a temperature measurement connecting structure 5, the inside of the shell 1 is provided with a boss 6, the top of the boss 6 is fixedly provided with an intelligent temperature transmitter 7, the intelligent temperature transmitter 7 adopts Emerson's 248 series HART intelligent temperature transmitter module, the applicable environment temperature range is-60 ℃ to +60 ℃, the MODBUS communication protocol is adopted to have an RS485 communication function, meanwhile, 4 to 20mA direct current signals can be output, the power supply is 12 to 36VDC wide voltage, the fault diagnosis function is also provided, and the fault of the temperature sensing element 57 can be detected and then an alarm is given; the top of the intelligent temperature transmitter 7 is provided with a stud 8, the stud 8 fixes a nixie tube display module 9 through a screw, the nixie tube display module 9 adopts a five-digit nixie tube to display a temperature value, a nixie tube display circuit is firstly designed, and electronic elements such as a capacitor, a resistor and a nixie tube which are resistant to the low temperature of-20 ℃ are integrated on a PCB (printed circuit board); a heating wire 14 is integrated on the top of the nixie tube display module 9, the diameter of the heating wire 14 is 0.6mm, the maximum heating power is 2W, the heating wire is arranged below the nixie tube in an S shape, and then copper is coated on the surface of the heating wire, so that the heat dissipation efficiency can be effectively improved, and the heat dissipation is more uniform; the glass window 11 is arranged at the top of the shell 1 and inside the shell cover 2, the pressing block 10 is arranged below the glass window 11, the temperature can be better observed and displayed through the glass window 11, meanwhile, the glass window 11 is made of high borosilicate toughened glass, the thickness of the glass window 11 is 15mm, the glass window can bear 2MPa water pressure and 4J energy impact, high-temperature-resistant silica gel is adopted for bonding and fixing, the sealing performance can be effectively guaranteed, meanwhile, the pressing block 10 is made of aviation aluminum and is subjected to hard anodic oxidation treatment, the glass window 11 can be further fixed after being screwed, and the glass window 11 can be effectively guaranteed not to be loosened when the temperature is frequently or severely changed; the inside of cable leading-in 4 all is provided with sealing washer 13, the one end that casing 1 was kept away from to cable leading-in 4 all is equipped with the joint 15 that compresses tightly through threaded connection, the one end that cable leading-in 4 was kept away from in the outside that compresses tightly joint 15 all overlaps and is equipped with sheath spring 18, two inside difference fixed mounting that compress tightly joint 15 have signal cable 19 and power cable 20, signal cable 19 and power cable 20's one end all with intelligent temperature transmitter 7 electric connection, the inside that compresses tightly joint 15 is equipped with stepped groove 151, compress tightly the equal embedment high temperature resistant silica gel in the inside that connects 15, through stepped groove 151, sheath spring 18 can effectively guarantee to receive drawing when the cable, can not separate with high temperature resistant silica gel when bending, thereby effectively guarantee the leakproofness of shell.

Wherein, the temperature measurement connecting structure 5 comprises a fixed joint 51, the inner thread of the lead-in end 3 is connected with the fixed joint 51, the outer side of the bottom of the fixed joint 51 is provided with a universal joint 54, the inner part of the universal joint 54 is provided with a connecting joint 55, the inner part of the fixed joint 51 is inserted with a protection tube 56, the protection tube 56 is welded and fixed with the fixed joint 51 by adopting argon arc welding full welding process, the bottom of the protection tube 56 extends to the lower part of the connecting joint 55, the bottom of the protection tube 56 is fixedly connected with a temperature measurement end 512 by adopting argon arc welding full welding process, the inner part of the temperature measurement end 512 is encapsulated with high-performance heat-conducting silica gel 59, the lower end of the inner part of the temperature measurement end 512 is fixed with a temperature sensing element 57, the upper end of the temperature measurement end 512 is fixedly connected with a partition plate 58 in the shape of fan blade, four hollow holes 510 are uniformly, four leads of the temperature sensing element 57 penetrate through the corresponding limiting holes 511 and are electrically connected with the intelligent temperature transmitter 7, and the temperature measuring connection structure 5 is arranged, so that the temperature sensing element 57 can be conveniently and better installed at the bottom of the shell 1.

Wherein, the equidistance is provided with No. three sealed pad 12 between the outside at casing 1 top and the inner wall of cap 2, through setting up No. three sealed pad 12 at the co-altitude not, the position of different external diameters, thereby form multistage seal structure of step, the passageway that medium got into equipment like this is "nearly" font, the resistance can the doubling increase, at first block by two preceding No. three sealed pads 12, then block by casing 1 and cap 2' S locking screw thread again, the gap between the screw thread is "S" shape, the resistance is the geometric figure increase this moment, block by No. three sealed pad 12 at last, can effectively guarantee the holistic leakproofness of equipment through this level four protection.

Wherein, the cable inlet 4 top of casing 1 is provided with positioning groove 23, 2 bottoms of cap are provided with top tight screw 22, screw cap 2 back top tight screw 22 of screw at casing 1 just can aim at positioning groove 23, explain that cap 2 has screwed in place, make No. three sealed pad 12 fully compressed to effectively guarantee cap 2 to the top seal of casing 1, cap 2 can not become flexible when also effectively guaranteeing that the temperature takes place frequent change or casing 1 vibration simultaneously.

Wherein, the inside of cable inlet 4 just is located sealing washer 13 and compresses tightly and all is provided with gasket 16 between connecting 15, makes to compress tightly to connect 15 and sealing washer 13 area of contact bigger, thereby guarantees that sealing washer 13 compresses tightly the better leakproofness that provides of effect, compresses tightly the outside that connects 15 and is located one side of cable inlet 4 and all is provided with No. four sealed pads 17, the better leakproofness of assurance cable inlet 4 of being convenient for.

Wherein, the top equipartition of cap 2 is equipped with four counter bores 21 for the spanner of the fixed cap 2 of screwing, can save some aviation aluminium's material simultaneously.

Wherein, the inside that compresses tightly joint 15 is equipped with stepped groove 151, and the inside that compresses tightly joint 15 all encapsulates high temperature resistant silica gel, can effectively guarantee through stepped groove 151, sheath spring 18 that can not separate with high temperature resistant silica gel when the cable receives to draw, bend to effectively guarantee the leakproofness of shell.

Wherein, the inside embedment of protection tube 56 has high temperature resistant silica gel 513, through embedment high temperature resistant silica gel 513, can effectively guarantee in the vibration environment that can not lead to the short circuit to break down because of the distance is too near or contact between four wires and the inner wall of protection tube 56, also effectively guarantee simultaneously that protection tube 56 is inside can not inhale moisture.

Wherein, the first sealing pad 52 is arranged inside the lead-in end 3 and on one side of the fixed joint 51, and the second sealing pad 53 is arranged outside the fixed joint 51 and below the lead-in end 3, so as to better ensure the sealing performance of the lead-in end 3.

The shell 1 and the shell cover 2 are made of aviation aluminum materials, the shell 1 and the shell cover 2 are made of high-pressure casting die forming technology, the light weight of equipment can be effectively guaranteed, the strength is high, meanwhile, the shell cover 2 and the shell 1 are firstly processed by hard anodic oxidation technology, the hard anodic oxidation thickness is 0.02mm, the measure has two effects, one effect is that the surface hardness of the shell can be effectively improved, the rigidity of the shell is further improved, the shell can bear 2MPa water pressure, the adverse effect of corrosive media and sunlight ultraviolet rays can be effectively prevented, then the surface is subjected to resin powder spraying technology processing, the spraying thickness is 0.15mm, the anti-corrosion and anti-ultraviolet capabilities of the shell are further improved, and therefore the shell can be applied to WF2 outdoor strong-corrosion environments and CM-5 ocean strong-corrosion environments.

A manufacturing method of a high-protection multifunctional explosion-proof temperature measuring device comprises the following steps:

s1, firstly, fixedly connecting a temperature measuring end 512 at the bottom of a protection tube 56, fixing a temperature sensing element 57 at the lower end inside the temperature measuring end 512, fixedly connecting a partition plate 58 in a fan blade shape at the upper end of the temperature measuring end 512, penetrating out a lead of the temperature sensing element 57 from a limiting hole 511 of the partition plate 58, then sequentially potting high-performance heat-conducting silica gel 59 inside the temperature measuring end 512 and potting high-temperature-resistant silica gel 513 inside a protection tube 56, then assembling a fixed joint 51, a universal joint 54 and a connecting joint 55, inserting the top of the fixed joint 51 into the lead-in end 3 after the assembly is completed, simultaneously inserting the top of the protection tube 56 into the fixed joint 51 for assembly, extending the lead of the temperature sensing element 57 inside the temperature measuring end 512 into the shell 1, and then connecting the lead with an intelligent temperature transmitter 7;

s2, simultaneously, inserting the signal cable 19 and the power cable 20 into the corresponding compression joint 15, screwing the compression joint 15 into the corresponding cable lead-in end 4 and screwing the compression joint, encapsulating the high-temperature-resistant silica gel 513 in the compression joint 15, arranging a sheath spring 18 at one end of the outer side of the compression joint 15 far away from the cable lead-in end 4, and electrically connecting the signal cable 19 and the power cable 20 with the intelligent temperature transmitter 7;

s3, then install intelligent temperature transmitter 7 at the top of boss 6 through the screw, then install charactron display module 9 on the double-screw bolt 8 at intelligent temperature transmitter 7 top, place glass window 11 at the inside top of cap 2 after that, and at the high temperature resistant silica gel 513 of the gap department embedment of glass window 11 and cap 2 inner wall, then at cap 2 internally mounted compact heap 10 and compress tightly glass window 11, then screw cap 2 and the top threaded connection of casing 1, then screw in the positioning groove 23 of casing 1 and screw tight screw 22, can accomplish the manufacturing to equipment this moment.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A high-protection multi-function explosion-proof temperature measuring device, characterized in that it comprises a casing (1), the top of the casing (1) is threadedly connected with a casing cover (2), and the The bottom is provided with a wire lead-in end (3), both sides of the housing (1) are provided with a cable lead-in end (4), and 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 housing (1), an intelligent temperature transmitter (7) is fixedly installed on the top of the boss (6), and the intelligent temperature transmitter (7) is provided on the top There are studs (8), the top of the studs (8) is connected with a digital tube display module (9) by screws, and a heating wire (14) is integrated on the top of the digital tube display module (9). The top of the body (1) and inside the shell cover (2) is provided with a pressing block (10), and a glass viewing window ( 11), a positioning groove (23) is provided on the outer side of the housing (1) and above the cable entry end (4), a top tightening screw (22) is provided on the bottom of the housing cover (2), and One end of the top tightening screw (22) extends to the interior of the positioning groove (23), a sealing ring (13) is provided inside the cable entry end (4), and the cable entry end (4) is far away from the casing One end of the body (1) is screwed with a compression joint (15), the inner of the compression joint (15) is provided with a stepped groove, and the outer side of the compression joint (15) is far away from the cable lead-in end ( 4) A sheath spring (18) is provided at one end, and a signal cable (19) and a power cable (20) are fixedly installed inside the two compression joints (15) respectively, and the signal cable (19) and the One end of the power cable (20) is electrically connected with the intelligent temperature transmitter (7). 2 . The high-protection multi-function explosion-proof temperature measuring device according to claim 1 , wherein the temperature measuring connection structure ( 5 ) comprises a fixed joint ( 51 ), and the inside of the wire lead-in end ( 3 ) is 2. 3 . A fixed joint (51) is threadedly connected, the outer side of the bottom of the fixed joint (51) is provided with a universal joint (54), and the inside of the universal joint (54) is provided with a connecting joint (55), the fixed joint A protection tube (56) is inserted inside the protection tube (51), the bottom of the protection tube (56) extends below the connection joint (55), and the temperature measurement end (512) is fixedly connected to the bottom of the protection tube (56). , a temperature sensing element (57) is fixed at the inner lower end of the temperature measuring end (512), and a fan blade-shaped partition plate (58) is fixedly connected to the upper end of the temperature measuring end (512). ) is arranged with four hollow holes (510), the partition plate (58) and between two adjacent hollow holes (510) are provided with limit holes (511), the temperature sensing element (57) The four conducting wires of the device pass through the corresponding limiting holes (511) and are electrically connected with the intelligent temperature transmitter (7). 3. A high-protection multi-function explosion-proof temperature measuring device according to claim 1, characterized in that a No. 3 seal is equidistant between the outer side of the top of the casing (1) and the inner wall of the casing cover (2). pad (12). 4. A high-protection multi-function explosion-proof temperature measuring device according to claim 1, characterized in that, the cable entry end (4) is located inside and between the sealing ring (13) and the compression joint (15) Gaskets (16) are provided on both sides, and No. 4 sealing gaskets (17) are provided on the outer side of the compression joint (15) and on the side located at the cable lead-in end (4). 5 . The high-protection multi-function explosion-proof temperature measuring device according to claim 1 , wherein the top of the shell cover ( 2 ) is evenly provided with four countersunk holes ( 21 ). 6 . 6 . The high-protection multi-function explosion-proof temperature measuring device according to claim 2 , wherein the protection tube ( 56 ) is potted with high-temperature resistant silica gel ( 513 ). 7 . 7 . The high-protection multi-function explosion-proof temperature measuring device according to claim 2 , wherein the inside of the temperature measuring end ( 512 ) is potted with high-performance thermally conductive silica gel ( 59 ). 8 . 8. A kind of high-protection multi-function explosion-proof temperature measuring device according to claim 2, characterized in that, a No. 1 gasket (No. 52), a No. 2 sealing gasket (53) is provided on the outer side of the fixed joint (51) and below the wire lead-in end (3). 9 . The high-protection multi-function explosion-proof temperature measuring device according to claim 1 , wherein the casing ( 1 ) and the casing cover ( 2 ) are made of aviation aluminum material. 10 . 10. The method for manufacturing a high-protection multifunctional explosion-proof temperature measuring device according to any one of claims 1-9, wherein the method comprises the following steps: S1. First, the temperature measuring end (512) is fixedly connected to the bottom of the protection tube (56), the temperature sensing element (57) is fixed at the inner lower end of the temperature measuring end (512), and its wires are removed from the limiting hole of the partition plate (58). (511), then the high-performance thermally conductive silica gel (59) is potted inside the temperature measuring end (512), and the high-temperature resistant silica gel (513) is potted inside the protection tube (56), and then the fixed joint (51) is sealed. , Assemble 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 lead-in end (3), and at the same time insert the top of the protection tube (56) into the fixed joint ( 51) is assembled, and the wire of the temperature sensing element (57) inside the temperature measuring end (512) is extended into the interior of the housing (1), and then the wire is connected to the intelligent temperature transmitter (7); S2. At the same time, insert the signal cable (19) and the power cable (20) into the corresponding compression joints (15) respectively, and then screw the compression joints (15) into the corresponding cable entry ends (4) respectively. Then, the high temperature resistant silica gel (513) is potted inside the compression joint (15), and the outer end of the compression joint (15) away from the cable entry end (4) is provided with a sheath spring (18). ), and respectively electrically connect the signal cable (19) and the power cable (20) with the intelligent temperature transmitter (7); S3. Next, install the smart temperature transmitter (7) on the top of the boss (6) through screws, and then install the digital tube display module (9) on the stud (8) on the top of the smart temperature transmitter (7). Then place the glass window (11) on top of the inside of the case cover (2), and potting high temperature resistant silica gel (513) at the gap between the glass window (11) and the inner wall of the case cover (2), (2) Install the pressing block (10) inside and press the glass window (11) tightly, then connect and fix the shell cover (2) on the top thread of the shell (1), and then press the top of the bottom of the shell cover (2) The tightening screw (22) is screwed into the positioning groove (23) of the casing (1) and screwed tightly, and the manufacture of the device can be completed at this time.

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