Tester

Abstract

The invention provides a tester which comprises a box body, a pumping assembly and an electromagnetic stirrer, the box body is provided with a first cavity and a second cavity, the second cavity is arranged at the bottom of the first cavity, and a first partition plate and a second partition plate which are arranged at intervals are arranged in the first cavity so that a high-temperature cavity, a test cavity and a low-temperature cavity which are arranged side by side can be limited; the pumping assembly comprises a water return pipe, a high-temperature pipe, a low-temperature pipe and a first water pump, the first water pump is arranged in the second cavity, the water return pipe is used for communicating the first water pump with the test cavity, the high-temperature pipe is used for communicating the first water pump with the high-temperature cavity, and the low-temperature pipe is used for communicating the first water pump with the low-temperature cavity; and the two electromagnetic stirrers are respectively arranged in the high-temperature cavity and the low-temperature cavity. The tester device has the advantages of being compact in structure, convenient to operate, high in automation degree and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing test equipment, and particularly relates to a tester. Background Art

[0002] Contour markers can indicate the direction of the road. At night or when visibility is poor, they clearly outline the edge and direction of the road, helping drivers understand the alignment of the road, such as the location of curves, uphill and downhill sections, etc., so that they can make driving preparations in advance.

[0003] The sealing performance of reflectors is one of the most important technical indicators of contour markers (microprismatic type). Due to extensive processing, this indicator also has the lowest pass rate among such products at present. Once there is a problem with the sealing performance of the product, water or fog will seep into the microprisms during use, resulting in the inability to reflect light and losing the function of line of sight guidance, thereby reducing driving safety. In the existing technology, manual operation is required when testing reflectors, and the test efficiency is low. Therefore, there is an urgent need for a device that can test the sealing performance of reflectors. Summary of the Invention

[0004] The present invention provides a tester to solve the defect of low manual test efficiency in the existing technology.

[0005] An embodiment of the present invention discloses a tester, including: A box body, the box body has a first chamber and a second chamber, the second chamber is arranged at the bottom of the first chamber, and a first partition and a second partition are arranged at intervals in the first chamber to define a side-by-side arrangement of a high-temperature chamber, a test chamber, and a low-temperature chamber. A first solenoid valve is provided on the first partition, and a second solenoid valve is provided on the second partition; A pumping assembly, the pumping assembly includes a return pipe, a high-temperature pipe, a low-temperature pipe, and a first water pump. The first water pump is arranged in the second chamber. The return pipe is used to connect the first water pump and the test chamber. The high-temperature pipe is used to connect the first water pump and the high-temperature chamber. The low-temperature pipe is used to connect the first water pump and the low-temperature chamber; Electromagnetic stirrers, there are two electromagnetic stirrers, and the two electromagnetic stirrers are respectively arranged in the high-temperature chamber and the low-temperature chamber.

[0006] In some embodiments, the tester includes: A sample fixing plate, the sample fixing plate is arranged in the test chamber, and the sample fixing plate is spaced from the bottom wall of the test chamber; A water outlet, the water outlet is arranged on the bottom wall of the test chamber and is located below the sample fixing plate. The return pipe is connected to the test chamber through the water outlet.

[0007] In some embodiments, the high-temperature pipe includes: The first section is disposed in the second cavity and connected to the first water pump; The second section, one end of the second section communicates with the first section, the other end of the second section passes through the bottom wall of the high-temperature cavity and extends into the high-temperature cavity, and the second section is sealingly connected to the bottom wall of the high-temperature cavity.

[0008] In some embodiments, the low-temperature tube includes: The third section is disposed in the second cavity and connected to the first water pump; The fourth section, one end of the fourth section communicates with the third section, the other end of the fourth section passes through the bottom wall of the low-temperature cavity and extends into the low-temperature cavity, and the fourth section is sealingly connected to the bottom wall of the low-temperature cavity.

[0009] In some embodiments, the tester includes a circulation assembly, and the circulation assembly includes: A second water pump; The first tube is disposed in the test cavity and connected to the second water pump; The second tube is connected to the second water pump, and both the second tube and the second water pump are disposed in the high-temperature cavity, or both the second tube and the second water pump are disposed in the low-temperature cavity.

[0010] In some embodiments, the tester includes a heating element and a first temperature sensor, and both the heating element and the first temperature sensor are disposed in the high-temperature cavity.

[0011] In some embodiments, the tester includes a refrigerating element and a second temperature sensor, and both the refrigerating element and the second temperature sensor are disposed in the low-temperature cavity.

[0012] In some embodiments, the pumping assembly includes: A third solenoid valve disposed on the high-temperature tube; A fourth solenoid valve disposed on the low-temperature tube.

[0013] In some embodiments, the tester includes: A cover body rotatably connected to the box body; An electric push rod, one end of the electric push rod is rotatably connected to the cover body, and the other end of the electric push rod is rotatably connected to the box body.

[0014] In some embodiments, the tester includes heat-insulating cotton, and the heat-insulating cotton is disposed on the surface of any one of the cover body, the box body, the first partition board, and the second partition board.

[0015] The tester device of the embodiment of the present invention has the advantages of compact structure, convenient operation, high intelligence level, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the tester provided by the present invention.

[0018] REFERENCE NUMERALS: 100, tester; 1, box body; 11, first chamber; 111, first partition; 112, second partition; 113, high-temperature chamber; 1131, heating element; 1132, first temperature sensor; 114, test chamber; 1141, third temperature sensor; 115, low-temperature chamber; 1151, refrigeration element; 1152, second temperature sensor; 12, second chamber; 2, pumping assembly; 21, return water pipe; 22, high-temperature pipe; 221, first section; 222, second section; 23, low-temperature pipe; 231, third section; 232, fourth section; 24, first water pump; 3, electromagnetic stirrer; 41, first solenoid valve; 42, second solenoid valve; 43, third solenoid valve; 44, fourth solenoid valve; 5, sample fixing plate; 6, water outlet; 71, second water pump; 72, first pipe; 73, second pipe; 8, cover body; 9, controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] The tester 100 of the embodiment of the present invention includes a box body 1, a pumping assembly 2, and an electromagnetic stirrer 3.

[0021] The box body 1 has a first cavity 11 and a second cavity 12. The second cavity 12 is arranged at the bottom of the first cavity 11. In the first cavity 11, a first partition plate 111 and a second partition plate 112 are arranged at intervals to define a high-temperature cavity 113, a test cavity 114, and a low-temperature cavity 115 arranged side by side. A first solenoid valve 41 is provided on the first partition plate 111, and a second solenoid valve 42 is provided on the second partition plate 112.

[0022] The pumping assembly 2 includes a return water pipe 21, a high-temperature pipe 22, a low-temperature pipe 23, and a first water pump 24. The first water pump 24 is arranged in the second cavity 12. The return water pipe 21 is used to connect the first water pump 24 and the test cavity 114. The high-temperature pipe 22 is used to connect the first water pump 24 and the high-temperature cavity 113. The low-temperature pipe 23 is used to connect the first water pump 24 and the low-temperature cavity 115.

[0023] There are two electromagnetic stirrers 3, which are respectively arranged in the high-temperature cavity 113 and the low-temperature cavity 115.

[0024] For example, for the convenience of description, the up-down direction and the left-right direction are as shown in the figure.

[0025] In the first cavity 11, the space is divided into a high-temperature cavity 113, a test cavity 114, and a low-temperature cavity 115 arranged in the left-right direction by the spaced-apart first partition plate 111 and second partition plate 112.

[0026] A first solenoid valve 41 is provided on the first partition plate 111 to control the fluid connection and disconnection between the high-temperature cavity 113 and the test cavity 114. The first solenoid valve 41 is arranged at the middle position of the first partition plate 111, that is, the distance between the first solenoid valve 41 and the top of the first partition plate 111 is half of the size of the first partition plate 111 in the up-down direction.

[0027] A second solenoid valve 42 is provided on the second partition plate 112 to control the fluid connection and disconnection between the low-temperature cavity 115 and the test cavity 114. The second solenoid valve 42 is arranged at the middle position of the second partition plate 112, that is, the distance between the second solenoid valve 42 and the top of the second partition plate 112 is half of the size of the second partition plate 112 in the up-down direction.

[0028] In addition, the first water pump 24 is installed in the second cavity 12 to drive the fluid circulation. The return water pipe 21 connects the first water pump 24 and the test cavity 114 to realize the fluid return; The high-temperature pipe 22 connects the first water pump 24 and the high-temperature cavity 113 to lead the water in the test cavity 114 to the high-temperature cavity 113; the low-temperature pipe 23 connects the first water pump 24 and the low-temperature cavity 115 to lead the water in the test cavity 114 to the low-temperature cavity 115.

[0029] In order to further improve the uniformity of the fluid in the high-temperature chamber 113 and the low-temperature chamber 115, the present invention also arranges electromagnetic stirrers 3 in the high-temperature chamber 113 and the low-temperature chamber 115 respectively. Through the action of the electromagnetic stirrer 3, the stability and consistency of the temperature field in the high-temperature chamber 113 or the low-temperature chamber 115 are ensured.

[0030] The tester 100 of the embodiment of the present invention can efficiently complete the multi-temperature zone test of the test sample by accurately controlling the temperature and fluid circulation in each cavity during the test. The specific test process is as follows: First, the test sample is placed in the test chamber 114, and water is filled into the low-temperature chamber 115 and the high-temperature chamber 113 according to the test requirements, and the water temperature in the high-temperature chamber 113 and the low-temperature chamber 115 is waited to reach the target temperature. During the waiting process, the electromagnetic stirrer 3 is started to ensure that the temperature of the water flow in each place in the high-temperature chamber 113 or the low-temperature chamber 115 remains consistent.

[0031] Then, after the water temperature in the high temperature chamber 113 reaches the current temperature, the first solenoid valve 41 is controlled to operate, and the water in the high temperature chamber 113 enters the test chamber 114 to immerse the test sample. Since the first solenoid valve 41 is arranged in the middle of the first partition 111, nearly half of the water in the high temperature chamber 113 will enter the test chamber 114.

[0032] After the test sample is immersed for a preset time, the first solenoid valve 41 is controlled to close, and then the first water pump 24 is started to pump the water in the test chamber 114 back into the high temperature chamber 113 through the return pipe 21 and the high temperature pipe 22 .

[0033] Next, the first water pump 24 stops running, and then the second control valve is opened to allow water in the low-temperature zone to enter the test chamber 114. After the test sample is soaked for a preset time, the second solenoid valve 42 is controlled to close, and then the first water pump 24 is started and the water flow in the test chamber 114 is pumped back to the low-temperature chamber 115 through the return pipe 21 and the low-temperature pipe 23.

[0034] Then, the cycle is run several times to alternately deliver the water in the high temperature chamber 113 and the low temperature chamber 115 to the test chamber 114 , so as to immerse the test sample.

[0035] The tester 100 further includes a controller 9 , which is electrically connected to the first solenoid valve 41 , the second solenoid valve 42 , the first water pump 24 and the electromagnetic stirrer 3 , so that the working process of the tester 100 can be controlled by setting a program in the controller 9 .

[0036] Optionally, the tester 100 further includes a water level detector disposed in the test chamber 114 to detect the water level in the test chamber 114, so that the controller 9 can know whether there is water in the test chamber 114, thereby facilitating the switching between high-temperature water flow and low-temperature water flow.

[0037] For the tester 100 according to the embodiment of the present invention, first, by providing the first chamber 11 and the second chamber 12 arranged vertically, and sequentially providing a high-temperature chamber 113, a test chamber 114, and a low-temperature chamber 115 in the first chamber 11, and providing a first water pump 24 in the second chamber 12, the overall structure of the tester 100 is made compact and the space utilization rate is high. Secondly, for the tester 100 according to the embodiment of the present invention, it can automatically alternate the delivery of high-temperature water and low-temperature water to the test chamber 114, with a high degree of automation and no need for manual testing, thus improving the testing efficiency. Moreover, the switching frequency between high temperature and low temperature and the soaking time can be flexibly adjusted according to test requirements, making it suitable for a variety of multi-temperature zone test scenarios.

[0038] The tester 100 device according to the embodiment of the present invention has the advantages of compact structure, convenient operation, and high degree of automation.

[0039] In some embodiments, as Figure 1 shown, the tester 100 includes a sample fixing plate 5 and a water outlet 6. The sample fixing plate 5 is disposed in the test chamber 114, and the sample fixing plate 5 is spaced from the bottom wall of the test chamber 114.

[0040] The water outlet 6 is provided on the bottom wall of the test chamber 114 and is located below the sample fixing plate 5. The return water pipe 21 is communicated with the test chamber 114 through the water outlet 6.

[0041] For example, during the test, the test sample is fixed on the sample fixing plate 5. When it is necessary to draw back the water flow in the test chamber 114, the water flow will flow into the return water pipe 21 from the water outlet 6 below the sample fixing plate 5 and finally return to the low-temperature chamber 115 or the high-temperature chamber 113. Since there is a gap between the sample fixing plate 5 and the bottom wall, the water flow can pass through smoothly, and at the same time, the test sample is always firmly fixed on the sample fixing plate 5 and will not be affected by the water flow. Moreover, due to the strong fluidity of the water flow at the water outlet 6, when the first water pump 24 sucks the water flow in the test chamber 114 through the return water pipe 21, a water flow with a certain speed and pressure will be formed near the water outlet 6. This high-speed flowing water flow can directly impact the test sample placed on the sample fixing plate 5, thus posing a higher test on the sealing performance of the test sample.

[0042] In some embodiments, as Figure 1 shown, the high-temperature pipe 22 includes a first section 221 and a second section 222. The first section 221 is disposed in the second chamber 12 and is connected to the first water pump 24.

[0043] One end of the second section 222 communicates with the first section 221. The other end of the second section 222 passes through the bottom wall of the high-temperature chamber 113 and extends into the high-temperature chamber 113, and the second section 222 is sealingly connected to the bottom wall of the high-temperature chamber 113.

[0044] For example, when the first water pump 24 is started, the water flow will first be delivered to the second section 222 through the first section 221, and then injected into the high-temperature chamber 113 through the second section 222. A sealing connection is adopted between the second section 222 and the bottom wall of the high-temperature chamber 113, thereby preventing the water flow in the high-temperature chamber 113 from leaking.

[0045] In some embodiments, as Figure 1 shown, the low-temperature pipe 23 includes a third section 231 and a fourth section 232. The third section 231 is arranged in the second chamber 12 and is connected to the first water pump 24.

[0046] One end of the fourth section 232 communicates with the third section 231. The other end of the fourth section 232 passes through the bottom wall of the low-temperature chamber 115 and extends into the low-temperature chamber 115, and the fourth section 232 is sealingly connected to the bottom wall of the low-temperature chamber 115.

[0047] For example, when the first water pump 24 is started, the water flow will first be delivered to the fourth section 232 through the third section 231, and then injected into the low-temperature chamber 115 through the fourth section 232. A sealing connection is adopted between the fourth section 232 and the bottom wall of the low-temperature chamber 115, thereby preventing the water flow in the low-temperature chamber 115 from leaking.

[0048] In some embodiments, as Figure 1 shown, the tester 100 includes a circulation assembly. The circulation assembly includes a second water pump 71, a first pipe 72, and a second pipe 73. The first pipe 72 is arranged in the test chamber 114 and is connected to the second water pump 71.

[0049] The second pipe 73 is connected to the second water pump 71. Both the second pipe 73 and the second water pump 71 are arranged in the high-temperature chamber 113, or both the second pipe 73 and the second water pump 71 are arranged in the low-temperature chamber 115.

[0050] For example, the second water pump 71 is installed in the test chamber 114 or the high-temperature chamber 113, or the second water pump 71 is installed in both the test chamber 114 and the high-temperature chamber 113.

[0051] The first pipe 72 is arranged in the test chamber 114 and is connected to the second water pump 71, and is used to guide the water flow in the test chamber 114 to the high-temperature chamber 113 or the low-temperature chamber 115.

[0052] When performing a high-temperature immersion on a test sample, the second water pump 71 is used to realize the circulating flow of the water flow between the test chamber 114 and the high-temperature chamber 113, thereby improving the effect of the high-temperature immersion and the temperature uniformity.

[0053] When the test sample is soaked at low temperature, the second water pump 71 is used to realize the circulating flow of water between the test chamber 114 and the low-temperature chamber 115, thereby improving the effect of low-temperature soaking and the temperature uniformity.

[0054] By adding a circulation component, the tester 100 device of the embodiment of the present invention further enhances the precise control ability of the temperature in the test chamber 114.

[0055] In some embodiments, as Figure 1 shown, the tester 100 includes a heating element 1131 and a first temperature sensor 1132, and both the heating element 1131 and the first temperature sensor 1132 are arranged in the high-temperature chamber 113.

[0056] For example, the heating element 1131 provides a stable heat source for the fluid in the high-temperature chamber 113, and quickly raises the temperature of the water flow in the high-temperature chamber 113 through an efficient heat conduction mechanism, ensuring that the high-temperature chamber 113 can reach and maintain the target temperature.

[0057] The first temperature sensor 1132 is used to detect the temperature change in the high-temperature chamber 113 in real time and feed the data back to the controller 9 for dynamically adjusting the working state of the heating element 1131. Moreover, the controller 9 can judge whether the water temperature in the high-temperature chamber 113 reaches the target temperature according to the value of the first temperature sensor 1132.

[0058] The collaborative work of the heating element 1131 and the first temperature sensor 1132 enables the high-temperature chamber 113 to establish a stable temperature field in a short time, providing a reliable high-temperature environment guarantee for the sample test in the test chamber 114. By arranging the heating element 1131 and the first temperature sensor 1132 in the high-temperature chamber 113, the tester 100 device of the embodiment of the present invention significantly improves the stability and reliability of high-temperature testing.

[0059] In some embodiments, as Figure 1 shown, the tester 100 includes a refrigerating element 1151 and a second temperature sensor 1152, and both the refrigerating element 1151 and the second temperature sensor 1152 are arranged in the low-temperature chamber 115.

[0060] For example, the refrigerating element 1151 provides a stable cold source for the fluid in the low-temperature chamber 115, ensuring that the low-temperature chamber 115 can reach and maintain the target temperature.

[0061] The second temperature sensor 1152 is used to detect the temperature change in the low-temperature chamber 115 in real time and feed the data back to the controller 9 for dynamically adjusting the working state of the refrigerating element 1151. Moreover, the controller 9 can judge whether the water temperature in the low-temperature chamber 115 reaches the target temperature according to the value of the second temperature sensor 1152.

[0062] The collaborative work of the refrigeration component 1151 and the second temperature sensor 1152 enables the low-temperature chamber 115 to establish a stable temperature field in a relatively short time, providing a reliable low-temperature environment guarantee for the sample test in the test chamber 114. By arranging the refrigeration component 1151 and the second temperature sensor 1152 in the low-temperature chamber 115, the tester 100 device of the embodiment of the present invention significantly improves the stability and reliability of the low-temperature test.

[0063] Optionally, a third temperature sensor 1141 is provided in the test chamber 114. The third temperature sensor 1141 is used to detect the water temperature in the test chamber 114, and the third temperature sensor 1141 is electrically connected to the controller 9.

[0064] In some embodiments, such as Figure 1 shown, the pumping assembly 2 includes a third solenoid valve 43 and a fourth solenoid valve 44. The third solenoid valve 43 is arranged on the high-temperature pipe 22 and is used to control the on-off of the water flow between the test chamber 114 and the high-temperature chamber 113. The fourth solenoid valve 44 is arranged on the low-temperature pipe 23 and is used to control the on-off of the water flow between the test chamber 114 and the low-temperature chamber 115. The controller 9 is electrically connected to the third solenoid valve 43 and the fourth solenoid valve 44 to control the operation of the third solenoid valve 43 and the fourth solenoid valve 44.

[0065] In some embodiments, such as Figure 1 shown, the tester 100 includes a cover body 8 and an electric push rod. The cover body 8 is rotatably connected to the box body 1. One end of the electric push rod is rotatably connected to the cover body 8, and the other end of the electric push rod is rotatably connected to the box body 1. The cover body 8 is hingedly connected to the box body 1, and an electric push rod is provided between the cover body 8 and the box body 1, so as to facilitate the opening and closing of the box body 1.

[0066] In some embodiments, such as Figure 1 shown, the tester 100 includes heat insulation cotton, and heat insulation cotton is provided on the surface of any one of the cover body 8, the box body 1, the first partition 111 and the second partition 112. For example, the heat insulation cotton is used to reduce heat transfer, thereby improving the heat insulation performance of the tester 100.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tester, characterized in that: include: A box body, the box body having a first cavity and a second cavity, the second cavity being arranged at the bottom of the first cavity, a first partition plate and a second partition plate arranged at intervals are arranged in the first cavity, so as to limit a high-temperature cavity, a test cavity and a low-temperature cavity arranged side by side, a first solenoid valve is arranged on the first partition plate, and a second solenoid valve is arranged on the second partition plate; A pumping assembly, the pumping assembly comprising a return pipe, a high-temperature pipe, a low-temperature pipe and a first water pump, the first water pump being arranged in the second chamber, the return pipe being used to connect the first water pump and the test chamber, the high-temperature pipe being used to connect the first water pump and the high-temperature chamber, and the low-temperature pipe being used to connect the first water pump and the low-temperature chamber; Electromagnetic stirrer, there are two electromagnetic stirrers, and the two electromagnetic stirrers are respectively arranged in the high-temperature chamber and the low-temperature chamber.

2. The tester according to claim 1, characterized in that: The tester comprises: A sample fixing plate, the sample fixing plate is arranged in the test chamber, and the sample fixing plate is spaced apart from the bottom wall of the test chamber; A water outlet is provided on the bottom wall of the test chamber and is located below the sample fixing plate, and the return water pipe is connected with the test chamber through the water outlet.

3. The tester according to claim 1, characterized in that: The high temperature tube comprises: a first section, the first section being disposed in the second chamber and connected to the first water pump; The second section, one end of the second section is connected to the first section, the other end of the second section passes through the bottom wall of the high-temperature chamber and extends into the high-temperature chamber, and the second section is sealed and connected to the bottom wall of the high-temperature chamber.

4. The tester according to claim 1, characterized in that: The cryogenic tube comprises: a third section, the third section being disposed in the second chamber and connected to the first water pump; The fourth section, one end of the fourth section is connected to the third section, the other end of the fourth section passes through the bottom wall of the low-temperature chamber and extends into the low-temperature chamber, and the fourth section is sealed and connected to the bottom wall of the low-temperature chamber.

5. The tester according to claim 1, characterized in that: The tester includes a circulation assembly, the circulation assembly including: Second water pump; a first tube, the first tube being disposed in the test chamber and connected to the second water pump; The second tube is connected to the second water pump, and the second tube and the second water pump are both arranged in the high-temperature chamber, or the second tube and the second water pump are both arranged in the low-temperature chamber.

6. The tester according to any one of claims 1 to 5, characterized in that: The tester comprises a heating element and a first temperature sensor, and both the heating element and the first temperature sensor are arranged in the high temperature chamber.

7. The tester according to any one of claims 1 to 5, characterized in that: The tester comprises a refrigeration element and a second temperature sensor, and both the refrigeration element and the second temperature sensor are arranged in the low temperature chamber.

8. The tester according to any one of claims 1 to 5, characterized in that: The pumping assembly comprises: a third solenoid valve, the third solenoid valve being arranged on the high temperature tube; A fourth solenoid valve is arranged on the cryogenic tube.

9. The tester according to any one of claims 1 to 5, characterized in that: The tester comprises: A cover body, the cover body is rotatably connected to the box body; An electric push rod, one end of which is rotatably connected to the cover body, and the other end of which is rotatably connected to the box body.

10. The tester according to claim 9, characterized in that: The tester includes heat-insulating cotton, and the surface of any one of the cover body, the box body, the first partition plate and the second partition plate is provided with the heat-insulating cotton.

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