Test device for resettable temperature protection element for potted explosion-proof equipment

Abstract

The present invention belongs to the technical field of temperature protection element test devices, especially a test device for a resetable temperature protection element used in potted explosion-proof equipment. The following solution is proposed. It includes a workbench, a control system arranged on the workbench, and a test device arranged on the workbench. The test device includes a test module, a lifting mechanism, and a positioning and clamping mechanism. The test module includes a heater and a stirring oil bath pot. The stirring oil bath pot is installed on the heater, and the heater is installed on the workbench. By setting the lifting mechanism and the positioning and clamping mechanism, multiple groups of tests can be carried out synchronously. When the lifting mechanism is started, the first motor will drive the first lead screw to rotate and at the same time drive the support platen to move vertically up and down along the limit rod, putting the protection element into and taking it out of the stirring oil bath pot, improving the test efficiency.

Description

Technical Field:

[0001] The present invention relates to the technical field of temperature protection element test devices, and in particular to a test device for a resetable temperature protection element for encapsulated explosion-proof equipment. Background Art:

[0002] Encapsulated explosion-proof products need to have a thermal protection function to protect the encapsulated compound from local heating. To achieve this function, encapsulated products generally use a resetable temperature protection element. The corresponding test items for this protection element are as follows: the function of the protection element should be verified, and the protection element should be able to break the rated current more than 5000 times. Currently, the test of the function of this protection element completely relies on manual operation, with a long test time, low efficiency, and the test results are greatly affected by the emotions and psychology of the personnel, making it difficult to ensure the consistency and accuracy of the test results. Summary of the Invention:

[0003] The purpose of the present invention is to address the deficiencies of the prior art by providing a test device for a resetable temperature protection element for encapsulated explosion-proof equipment, which is used to solve the problems that the current test of the function of this protection element completely relies on manual operation, with a long test time, low efficiency, and the test results are greatly affected by the emotions and psychology of the personnel, making it difficult to ensure the consistency and accuracy of the test results.

[0004] A test device for a resetable temperature protection element for encapsulated explosion-proof equipment includes a workbench and a test device arranged on the workbench. The test device includes a test module, a lifting mechanism, and a positioning and clamping mechanism;

[0005] The test module includes a heater and a stirring oil bath. The stirring oil bath is installed on the heater, and the heater is installed on the workbench;

[0006] The lifting mechanism is arranged above the test module and includes a first motor, a first lead screw, a limiting rod, and a supporting platform plate. The first lead screw is vertically installed on the workbench and supports the first motor through a fixing plate. The first lead screw is fixedly installed at the output end of the first motor, and its bottom is rotatably connected to the workbench. The supporting platform plate is rotatably connected to the first lead screw and moves vertically up and down along the limiting rod;

[0007] The positioning and clamping mechanism is arranged above the test module and includes a clamping component and a support and adjustment component. The clamping component includes a second motor, a second lead screw, a fixed base plate, a connecting ring, a limiting cylinder, a first adjusting rod, a second adjusting rod, a slider, a rotating block, a pressing end, and an adjusting nut. The second motor is installed on the support base plate. The fixed base plate is fixedly installed at the bottom of the support base plate through a connecting cylinder. The limiting cylinder is fixedly installed at the middle bottom end of the fixed base plate. The second lead screw is installed at the output end of the second motor and extends through the connecting cylinder to the inner bottom end of the limiting cylinder. The adjusting nut is rotatably sleeved on the threaded part at the lower end of the second lead screw. The connecting ring is fixedly installed at the upper end of the limiting cylinder. There are five groups of the second adjusting rods, one end of each of which is hinged to the adjusting nut, and the other end passes through the notch on the limiting cylinder and slides on the fixed base plate through an adjusting block. There are five groups of the first adjusting rods. One end of each of the five groups of the first adjusting rods is rotatably connected to the connecting ring and is arranged staggeredly corresponding to the five groups of the second adjusting rods. The slider is slidably sleeved on the second adjusting rod. One end face of the rotating block is rotatably connected to the slider through a rotating shaft and is sleeved on the first adjusting rod. The pressing end is rotatably connected to the bottom end of the first adjusting rod;

[0008] The support and adjustment component is arranged at the lower end of the clamping component. The support and adjustment component includes a base, a bearing plate, a connecting column, and a pin shaft. The connecting column is fixedly installed at the bottom end of the limiting cylinder. The base is slidably sleeved on the lower end of the connecting column. There are ten groups of the bearing plates, which are fixedly arranged around the base in a surrounding manner, and two of them are correspondingly arranged below each pressing end. The pin shaft horizontally penetrates the base and the connecting column on the central axis of the base.

[0009] By adopting the above technical solution, it is possible to realize multi-directional clamping and protection of the component, and enable the protected component to be tested in the test module.

[0010] The bottom of the base is evenly surrounded by limiting plates that are correspondingly arranged between two adjacent bearing plates. Each group of the limiting plates has two spaced and parallel arrangements.

[0011] By adopting the above technical solution, while being able to separate the protected components at intervals, it is possible to allow the air outlet plate to pass through smoothly.

[0012] It further includes an air-drying and heat-dissipating mechanism, which is arranged between the test module and the positioning and clamping mechanism. The air-drying and heat-dissipating mechanism includes a fan, a channel ring and an air outlet plate. The fan is installed on the workbench through a support block. The output end of the fan is connected to the channel ring through a ventilation pipe. The channel ring is installed above the stirring oil bath through a support plate. The air outlet plates are evenly arranged around the inner wall of the channel ring and are respectively located directly below each group of the limiting plates.

[0013] By adopting the above technical solution, while dissipating heat from the protection element, the liquid on the protection element can be quickly blown into the stirring oil bath and its surface can be air-dried, which is convenient for subsequent operations.

[0014] The central axis of each group of the air outlet plates and the central axis of each group of the limiting plates are in the same vertical cross-section, and the thickness of the air outlet plate is less than the distance between the corresponding two limiting plates.

[0015] By adopting the above technical solution, the air outlet plate can pass through smoothly.

[0016] A fan facing the positioning and clamping mechanism is installed on the upper end surface of the workbench, and the height of the air outlet of the fan is higher than the height of the channel ring.

[0017] By adopting the above technical solution, the heat dissipation speed of the protection element is increased.

[0018] The diameter of the stirring oil bath gradually increases from bottom to top. The diameter of the upper end of the stirring oil bath is larger than the diameter of the channel ring. The support plate for supporting the channel ring on the stirring oil bath is fixedly installed on the inner wall of the stirring oil bath.

[0019] By adopting the above technical solution, when the air blown out by the air outlet plate blows the liquid on the protection element, it can be caught by the stirring oil bath.

[0020] The connecting cylinder is hollow, and the diameter of the connecting cylinder is larger than the diameter of the second lead screw. The outer wall of the upper end of the second lead screw is smooth, and the part of the second lead screw below the fixed platen is threaded.

[0021] By adopting the above technical solution, while stabilizing the fixed platen, the second lead screw can rotate smoothly.

[0022] The central points of the second lead screw, the limiting cylinder, the connecting column, the base and the connecting cylinder are all on the same vertical center line. The limiting cylinder is rotatably connected to the inner bottom end of the limiting cylinder through a bearing.

[0023] By adopting the above technical solution, the positioning and clamping mechanism can operate smoothly.

[0024] The beneficial effects of the test device for the resetable temperature protection element used in the potted explosion-proof equipment of the present invention are as follows:

[0025] 1. By setting the lifting mechanism and the positioning and clamping mechanism, multiple groups of tests can be carried out synchronously. When the lifting mechanism is started, the first motor will drive the first lead screw to rotate and drive the support platen to move vertically up and down along the limit rod, putting the protection element into and taking it out of the stirring oil bath, improving the test efficiency;

[0026] 2. By setting the air-drying and heat-dissipating mechanism, the fan conveys air to the air outlet plate through the channel ring, and can cool the protection element during the rising process of the protection element. Subsequently, the fan starts, which can also cool the protection element. After the temperature drops to the reset temperature of the protection element, it is convenient for subsequent cyclic tests;

[0027] 3. By setting the pressing end part, since the pressing end part is rotatably connected to the lower end of the first adjusting rod, and the two end parts of the pressing end part are integrally in a cross-shaped structure, it can be stuck on the upper edge part of the protection element when the lower end part of the first adjusting rod approaches the protection element, thereby positioning and clamping the protection element;

[0028] 4. By setting the air outlet plate and the limit plate, since the distance between two adjacent limit plates is greater than the thickness of the air outlet plate, it can smoothly move through the air outlet plate into the stirring oil bath, and can disperse the protection elements, for rapid air-drying and rapid cooling of the protection elements. Description of the drawings:

[0029] Figure 1 It is the front view of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0030] Figure 2 It is the rear view of the workbench of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0031] Figure 3 It is the structural schematic diagram of the positioning and clamping mechanism and the test module of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0032] Figure 4 It is the structural schematic diagram of the air-drying and heat-dissipating mechanism and the test module of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0033] Figure 5 It is the top view of the positioning and clamping mechanism of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0034] Figure 6Front view of the positioning and clamping mechanism of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0035] Figure 7 Schematic diagram of the structure of the second motor, second lead screw, connecting column and base of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention;

[0036] Figure 8 Schematic diagram of the structure of the base, connecting column and pin shaft of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention.

[0037] Figure 9 Circuit diagram of the control system of the test device for the resetable temperature protection element used in the potted explosion-proof equipment proposed by the present invention.

[0038] In the figure: 1, workbench; 2, industrial integrated touch computer; 3, AC voltage regulator; 4, DC regulated power supply; 5, resistance box; 6, test module; 601, heater; 602, stirring oil bath; 7, lifting mechanism; 701, first motor; 702, first lead screw; 703, limiting rod; 704, supporting platform plate; 8, positioning and clamping mechanism; 801, second motor; 802, second lead screw; 803, fixed platform plate; 804, connecting ring; 805, limiting cylinder; 806, first adjusting rod; 807, second adjusting rod; 808, slider; 809, rotating block; 810, pressing end; 811, base; 812, bearing plate; 813, limiting plate; 814, adjusting nut; 815, adjusting block; 816, connecting column; 817, pin shaft; 9, connecting cylinder; 10, air drying and heat dissipation mechanism; 1001, fan; 1002, channel ring; 1003, air outlet plate; 11, fan; 12, PLC controller; 13, 485 communication interface; 14, digital display voltage and ammeter; 15, temperature controller. Specific embodiments:

[0039] The following elaborates on the preferred embodiments of the present invention with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0040] Refer to Figures 1-9 , a test device for a resetable temperature protection element used in a potted explosion-proof equipment, comprising a workbench 1, a control system arranged on the workbench 1, and a test device arranged on the workbench 1.

[0041] The control system includes an industrial all-in-one touch computer 2 (with human-machine interaction software) set on the upper left side of the workbench 1. On the left side of the middle layer of the workbench 1, an AC voltage regulator 3 and a DC regulated power supply 4 are arranged in the front and back. On the right side of the middle layer of the workbench 1 is the test module 6. On the left side of the bottom layer of the workbench 1, a resistance box 5 is installed. On the industrial all-in-one touch computer 2, there is a 485 communication interface 13 and casters for moving the bottom of the workbench 1. On the right rear side of the workbench 1, a digital display voltage and ammeter 14 and a PLC controller 12 are installed. This device has a voltage and current monitoring system, which can monitor various parameters of the protection element in real time and display the data on the industrial all-in-one touch computer 2. It has the function of communicating with the upper computer through the 485 communication interface 13 and can transmit the test data to the upper computer in real time for processing. There are two power supply modes: the AC voltage regulator 3 and the DC regulated power supply 4. By setting the temperature value on the industrial all-in-one touch computer 2, the heater 601 can heat up according to the set value. During this process, the temperature value is fed back to the industrial all-in-one touch computer 2 in real time until the set value is reached;

[0042] The AC voltage regulator 3 can adjust the AC220V input power supply to an output of AC0 - 250V, and the capacity at the highest output voltage is 4000VA. The DC regulated power supply 4 outputs a voltage of DC0 - 60V, and the voltage value is continuously adjustable, with a maximum current of 10A; Resistance box 5: rated current 10A, resistance value continuously adjustable; PLC controller 12: selects the test circuit by controlling the action of the relay; collects measurement values such as voltage and current through the RS485 communication interface 13; Industrial all-in-one touch computer 2: sets parameters; displays data; Temperature controller 15: controls the temperature of the oil bath and transmits temperature data to and from the PLC controller 12.

[0043] Such as Figure 9 shown:

[0044] V1: AC voltage transmitter, RS485 communication interface.

[0045] A1: AC current transmitter, RS485 communication interface.

[0046] V1: DC voltage transmitter, RS485 communication interface.

[0047] A1: DC current transmitter, RS485 communication interface.

[0048] S1, S2: Relays controlled by the PLC controller 12.

[0049] The test device includes a test module 6, a lifting mechanism 7 and a positioning and clamping mechanism 8. The test module 6 includes a heater 601 and a stirring oil bath 602. The stirring oil bath 602 is installed on the heater 601, and the heater 601 is installed on the workbench 1;

[0050] The lifting mechanism 7 includes a first motor 701, a first lead screw 702, a limiting rod 703 and a supporting table plate 704. The first lead screw 702 is vertically installed on the workbench 1 and supports the first motor 701 through a fixing plate. The first lead screw 702 is fixedly installed at the output end of the first motor 701, and its bottom is rotatably connected to the workbench 1. The supporting table plate 704 is rotatably connected to the first lead screw 702 and moves vertically up and down along the limiting rod 703;

[0051] The positioning and clamping mechanism 8 is arranged above the test module 6. The positioning and clamping mechanism 8 includes a clamping component and a supporting and adjusting component. The clamping component includes a second motor 801, a second lead screw 802, a fixed table plate 803, a connecting ring 804, a limiting cylinder 805, a first adjusting rod 806, a second adjusting rod 807, a slider 808, a rotating block 809, a pressing end 810 and an adjusting nut 814. The second motor 801 is installed on the supporting table plate 704. The fixed table plate 803 is fixedly installed at the bottom of the supporting table plate 704 through a connecting cylinder 9. The limiting cylinder 805 is fixedly installed at the middle bottom end of the fixed table plate 803. The second lead screw 802 is installed at the output end of the second motor 801 and extends through the connecting cylinder 9 to the inner bottom end of the limiting cylinder 805. The adjusting nut 814 is rotatably sleeved on the thread at the lower end of the second lead screw 802. The connecting ring 804 is fixedly installed at the upper end of the limiting cylinder 805. There are five groups of second adjusting rods 807, one end of each of which is hinged to the adjusting nut 814, and the other end passes through the notch on the limiting cylinder 805 and slides on the fixed table plate 803 through an adjusting block 815. There are five groups of first adjusting rods 806. One end of each of the five groups of first adjusting rods 806 is rotatably connected to the connecting ring 804 and is arranged in an alternating manner corresponding to the five groups of second adjusting rods 807. The slider 808 is slidably sleeved on the second adjusting rod 807. One end face of the rotating block 809 is rotatably connected to the slider 808 through a rotating shaft and is sleeved on the first adjusting rod 806. The pressing end 810 is rotatably connected to the bottom end of the first adjusting rod 806;

[0052] The supporting and adjusting component is arranged at the lower end of the clamping component. The supporting and adjusting component includes a base 811, a bearing plate 812, a connecting column 816 and a pin shaft 817. The connecting column 816 is fixedly installed at the bottom end of the limiting cylinder 805. The base 811 is slidably sleeved on the lower end of the connecting column 816. There are ten groups of bearing plates 812 which are fixedly arranged around the base 811, and two of them are correspondingly arranged below each pressing end 810. The pin shaft 817 horizontally penetrates through the base 811 and the connecting column 816 on the central axis of the base 811.

[0053] The bottom of the base 811 is evenly surrounded by limiting plates 813 which are correspondingly arranged between two adjacent bearing plates 812. Each group of limiting plates 813 has two intervals and is arranged in parallel.

[0054] It further includes an air-drying and heat-dissipating mechanism 10, which is arranged between the test module 6 and the positioning and clamping mechanism 8. The air-drying and heat-dissipating mechanism 10 includes a fan 1001, a channel ring 1002 and an air outlet plate 1003. The fan 1001 is installed on the workbench 1 through a support block, and the output end of the fan 1001 is connected to the channel ring 1002 through a ventilation pipe. The channel ring 1002 is installed above the stirring oil bath 602 through a support plate, and the air outlet plate 1003 is evenly surrounded by the inner wall of the channel ring 1002 and is directly below each group of limit plates 813 one by one.

[0055] The central axis of each air outlet plate 1003 and the central axis of each group of limit plates 813 are in the same vertical section, and the thickness of the air outlet plate 1003 is less than the distance between the corresponding two limit plates 813.

[0056] A fan 11 facing the positioning and clamping mechanism 8 is installed on the upper end surface of the workbench 1, and the height of the air outlet of the fan 11 is higher than the height of the channel ring 1002.

[0057] The diameter of the stirring oil bath 602 gradually increases from bottom to top. The diameter of the upper end of the stirring oil bath 602 is larger than the diameter of the channel ring 1002, and the support plate for supporting the channel ring 1002 on the stirring oil bath 602 is fixedly installed on the inner wall of the stirring oil bath 602.

[0058] The connecting cylinder 9 is hollow, and the diameter of the connecting cylinder 9 is the same as that of the second lead screw 802. The outer wall of the upper end of the second lead screw 802 is smooth, and the part of the second lead screw 802 below the fixed platen 803 is threaded.

[0059] The central points of the second lead screw 802, the limit cylinder 805, the connecting column 816, the base 811 and the connecting cylinder 9 are all on the same vertical center line. The limit cylinder 805 is rotatably connected to the inner bottom end of the limit cylinder 805 through a bearing;

[0060] The properties of the protection components are divided into two types. One uses a DC circuit, and the other uses an AC circuit. According to the protection components, AC or DC is selected, and the corresponding AC voltage regulator 3 or DC regulated power supply 4 is connected to the protection components, and the corresponding current is applied to the protection components.

[0061] Working principle: The first step is to connect the temperature control switch; the second step is to select AC or DC on the touch screen; the third step is to adjust the voltage and current of the circuit to meet the test requirements; the fourth step is to set the temperature value of the stirring oil bath 602 and the number of test times on the touch screen; the fifth step is to start the test after the temperature of the stirring oil bath 602 reaches the set value; the sixth step is to connect the AC voltage regulator 3 or DC regulated power supply 4 according to the nature of the protection element to be tested, and according to the size of the protection element, remove the pin shaft 817 from the base 811 and the connecting column 816. After adjusting the position of the base 811 on the connecting column 816 up and down, insert the pin shaft 817 into the base 811 and the connecting column 816 again to fix the base 811 and the connecting column 816. Then place the protection elements to be tested at the corresponding positions on the bearing plate 812 one by one. At this time, the second motor 801 can be started to drive the second lead screw 802 to rotate. The second lead screw 802 drives the adjusting nut 814 to move downward in the limiting cylinder 805 to a suitable position. When the adjusting nut 814 moves downward, it drives one end of the second adjusting rod 807 to move downward at the same time, while the other end of the second adjusting rod 807 will slide on the fixed platen 803 toward the center point of the fixed platen 803. Since the slider 808 is slidably connected to the second adjusting rod 807, and the rotating block 809 is rotatably connected to the slider 808 through a rotating shaft, and one end of the first adjusting rod 806 is rotatably connected to the connecting ring 804, the lower end of the first adjusting rod 806 at this time will move toward the position of the limiting cylinder 805. Since the pressing end 810 is rotatably connected to the lower end of the first adjusting rod 806, and the two end parts of the pressing end 810 are integrally in a cross-shaped structure, it can be stuck on the upper edge part of the protection element when the lower end part of the first adjusting rod 806 leans against the protection element, so as to position and clamp the protection element;

[0062] Then the lifting mechanism 7 can be started. While the first motor 701 drives the first lead screw 702 to rotate, it drives the support platen 704 to move vertically downward along the limiting rod 703, so as to drive the protection element downward into the stirring oil bath 602; during the descending process, since the limiting plate 813 separates the protection elements from each other, and the distance between two adjacent limiting plates 813 is greater than the thickness of the air outlet plate 1003, it can smoothly move through the air outlet plate 1003 into the stirring oil bath 602.

[0063] Set the heating temperature value through the industrial all-in-one touch computer 2. By adjusting the DC regulated power supply 4 or the AC voltage regulator 3, a predetermined current is made to flow through the protection element. Set the heating temperature value on the industrial all-in-one touch computer 2. Through the heating of the heater 601 and the stirring action of the stirring oil bath 602, the protection element is heated slowly and evenly. After reaching the operating temperature of the protection element, the protection element operates, the contact is disconnected, and the PLC controller 12 continuously collects the voltage and current signals of the circuit. When the current signal is 0 and it is determined that the protection element is disconnected, then the lifting mechanism 7 is started. The first motor 701 will drive the first lead screw 702 to rotate while driving the support platen 704 to move vertically upward along the limit rod 703, taking the protection element away from the stirring oil bath 602 for cooling;

[0064] Then start the fan 1001 to send air through the channel ring 1002 to the air outlet plate 1003, and the protection element can be cooled during the rising process of the protection element. Subsequently, the fan 11 is started, which can also cool the protection element. After the temperature drops to the reset temperature of the protection element, the element resets (the contact is closed), and the lifting mechanism 7 is started to put the element into the heater 601. This is one cycle. Count 1 on the display screen of the industrial all-in-one touch computer 2. During this process, the real-time temperature of the heater 601 and the voltage and current values of the protection element can be displayed on the touch computer display screen in real time through the PLC controller 12, and communicate with the upper computer in real time through the 485 communication interface 13. Set the required number of cycles on the industrial all-in-one touch computer 2, and the entire test process can be automatically operated without manual intervention. In case of a fault or special situation during the process, the fault can be automatically judged and an alarm can be given.

[0065] When the protection element rises again after completing the final test, the air blown out by the air outlet plate 1003 can quickly blow the liquid on the protection element back into the stirring oil bath 602, and the protection element can be quickly air-dried, facilitating the test of the next group of elements.

[0066] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A test device for a resetable temperature protection element used in a potted explosion-proof device, comprising a workbench (1) and a test device arranged on the workbench (1). It is characterized in that: The test device includes a test module (6), a lifting mechanism (7) and a positioning and clamping mechanism (8); The test module (6) includes a heater (601) and a stirring oil bath (602). The stirring oil bath (602) is installed on the heater (601), and the heater (601) is installed on the workbench (1); The lifting mechanism (7) is arranged above the test module (6) and includes a first motor (701), a first lead screw (702), a limiting rod (703) and a support platform plate (704). The first lead screw (702) is vertically installed on the workbench (1) and supports the first motor (701) through a fixing plate. The first lead screw (702) is fixedly installed at the output end of the first motor (701), and its bottom is rotatably connected to the workbench (1). The support platform plate (704) is rotatably connected to the first lead screw (702) and moves vertically up and down along the limiting rod (703); The positioning and clamping mechanism (8) is arranged above the test module (6) and includes a clamping assembly and a support and adjustment assembly. The clamping assembly includes a second motor (801), a second lead screw (802), a fixed base plate (803), a connecting ring (804), a limiting cylinder (805), a first adjusting rod (806), a second adjusting rod (807), a slider (808), a rotating block (809), a pressing end (810) and an adjusting nut (814). The second motor (801) is installed on the support base plate (704). The fixed base plate (803) is fixedly installed at the bottom of the support base plate (704) through a connecting cylinder (9). The limiting cylinder (805) is fixedly installed at the middle bottom end of the fixed base plate (803). The second lead screw (802) is installed at the output end of the second motor (801) and extends through the connecting cylinder (9) to the inner bottom end of the limiting cylinder (805). The adjusting nut (814) is rotatably sleeved on the threaded part of the lower end of the second lead screw (802). The connecting ring (804) is fixedly installed at the upper end of the limiting cylinder (805). There are five groups of the second adjusting rods (807), one end of each of which is hinged to the adjusting nut (814), and the other end passes through the notch on the limiting cylinder (805) and slides on the fixed base plate (803) through an adjusting block (815). There are five groups of the first adjusting rods (806). One end of each of the five groups of the first adjusting rods (806) is rotatably connected to the connecting ring (804) and is arranged in an alternating and corresponding manner with the five groups of the second adjusting rods (807). The slider (808) is slidably sleeved on the second adjusting rod (807). One end face of the rotating block (809) is rotatably connected to the slider (808) through a rotating shaft and is sleeved on the first adjusting rod (806). The pressing end (810) is rotatably connected to the bottom end of the first adjusting rod (806). The support and adjustment assembly is arranged at the lower end of the clamping assembly. The support and adjustment assembly includes a base (811), a bearing plate (812), a connecting column (816) and a pin shaft (817). The connecting column (816) is fixedly installed at the bottom end of the limiting cylinder (805). The base (811) is slidably sleeved on the lower end of the connecting column (816). There are ten groups of the bearing plates (812) which are fixedly arranged around the base (811), and two of them are correspondingly arranged below each of the pressing ends (810). The pin shaft (817) horizontally penetrates through the base (811) and the connecting column (816) on the central axis of the base (811).

2. The test device for a resettable temperature protection element for a potted explosion-proof device according to claim 1, characterized in that: The bottom of the base (811) is evenly surrounded by limiting plates (813) which are correspondingly arranged between two adjacent groups of the bearing plates (812). Each group of the limiting plates (813) has two spaced and parallel arrangements.

3. The test device for a resetable temperature protection element used in a potted explosion-proof device according to claim 2, characterized in that: it further includes an air-drying and heat-dissipating mechanism (10), the air-drying and heat-dissipating mechanism (10) is arranged between the test module (6) and the positioning and clamping mechanism (8), the air-drying and heat-dissipating mechanism (10) includes a fan (1001), a channel ring (1002) and an air outlet plate (1003), the fan (1001) is installed on the workbench (1) through a support block, the output end of the fan (1001) is connected to the channel ring (1002) through a ventilation pipe, the channel ring (1002) is installed above the stirring oil bath (602) through a support plate, and the air outlet plates (1003) are evenly arranged around the inner wall of the channel ring (1002) and are respectively located directly below each group of the limiting plates (813).

4. The test device for a resetable temperature protection element used in a potted explosion-proof device according to claim 3, characterized in that: the central axes of each group of the air outlet plates (1003) and each group of the limiting plates (813) are in the same vertical section, and the thickness of the air outlet plate (1003) is less than the distance between the corresponding two limiting plates (813).

5. The test device for a resetable temperature protection element used in a potted explosion-proof device according to claim 4, characterized in that: a fan (11) facing the positioning and clamping mechanism (8) is installed on the upper end surface of the workbench (1), and the height of the air outlet of the fan (11) is higher than the height of the channel ring (1002).

6. The test device for a resetable temperature protection element used in a potted explosion-proof device according to claim 3, characterized in that: the diameter of the stirring oil bath (602) gradually increases from bottom to top, the upper diameter of the stirring oil bath (602) is larger than the diameter of the channel ring (1002), and the support plate for supporting the channel ring (1002) on the stirring oil bath (602) is fixedly installed on the inner wall of the stirring oil bath (602).

7. The test device for a resetable temperature protection element used in a potted explosion-proof device according to claim 1, characterized in that: the connecting cylinder (9) is hollow, and the diameter of the connecting cylinder (9) is larger than the diameter of the second lead screw (802), the outer wall of the upper end of the second lead screw (802) is smooth, and the part of the second lead screw (802) below the fixed platen (803) is threaded.

8. The test device for a resetable temperature protection element used in a potted explosion-proof device according to claim 7, characterized in that: the central points of the second lead screw (802), the limiting cylinder (805), the connecting column (816), the base (811) and the connecting cylinder (9) are all on the same vertical center line, and the limiting cylinder (805) is rotatably connected to the inner bottom end of the limiting cylinder (805) through a bearing.

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