Explosion-proof test box and explosion-proof method

Abstract

The present invention belongs to the technical field of test equipment, and specifically relates to an explosion-proof test box and an explosion-proof method. Through the setting of a rotating ring mechanism and two test chambers with different temperature test environments opened in the box, different component test environment needs can be met more conveniently, quickly and safely. When performing high and low temperature impact tests, the environment can be switched directly without the need to additionally take out the test components to cause possible explosion or deflagration risks. The setting of the protection component can provide certain protection during the component testing process without affecting the component placement and automatically changing the test environment. The setting of the over-temperature mechanism can further reduce the impact of changes in the test environment and improve the accuracy of the test. At the same time, it can also provide certain protection during the component transfer process to reduce the impact caused by deflagration or explosion.

Description

Technical Field

[0001] The invention belongs to the technical field of test equipment, and in particular relates to an explosion-proof test box and an explosion-proof method. Background Art

[0002] In order to ensure the safety of electronic and electrical components during use, most of these devices will undergo corresponding explosion-proof tests before they are put into use. For example, the safety testing of batteries in the new energy that is being vigorously developed currently includes high and low temperature environment tests.

[0003] At present, in order to ensure safety during the test, the battery is placed in a relatively closed box, and then the environment inside the box is changed, such as heating or cooling, so as to simulate the use of batteries in extreme environments. At present, most general test chambers only use the box door for protection. When the battery components fail, deflagration or explosion occurs, the box door will be directly impacted. At the same time, when conducting high and low temperature impact tests, there is a need to manually transfer the battery or wait for the temperature in the test chamber to change slowly. This also easily leads to the risk of opening the box to transfer the device or waiting for the temperature change, which may extend the test time or affect the test accuracy. Summary of the invention

[0004] The purpose of the present invention is to provide an explosion-proof test box and an explosion-proof method to solve the problems mentioned in the background technology.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0006] An explosion-proof test box, comprising a box body and a control panel, wherein the box body is provided with two test chambers correspondingly distributed up and down, a heating mechanism and a cooling mechanism are respectively provided in the two test chambers, and a conversion mechanism is provided between the two test chambers;

[0007] The box body is provided with a connecting window between the two test cavities, the upper inner wall of the upper test cavity and the lower inner wall of the lower test cavity are both provided with inner cavity grooves, the conversion mechanism is slid up and down in the connecting window, the conversion mechanism includes a lifting component, a protection component and a placement table, the lifting component is provided on the upper inner wall of the upper test cavity and extends into the connecting window, the number of the protection components is two and they are respectively provided on the lower inner walls of the two test cavities, and the placement table is connected to the lifting component and provided between the two test cavities.

[0008] The lifting assembly includes a motor, a screw and a first guide rod. The motor is embedded in the upper end of the box body. The screw is connected to the output shaft of the motor and rotates the upper inner wall of the test chamber on the upper side. The number of the first guide rods is at least two. The screw and the first guide rod are equidistantly arranged around the circumference of the placement table behind the door side away from the box body. The placement table is connected to the screw and the first guide rod.

[0009] The placing table includes a table top and a connecting rod. There are two table tops. The connecting rod is arranged between the two table tops. There are several connecting rods and they are arranged equidistantly around the circumference of the table top behind the door side away from the box body. The table top is composed of two concentrically overlapping circular plates of different diameters. The circular plate with a larger diameter matches the diameter of the connecting window and is slidingly and sealingly connected to it. The upper table top is connected and matched with the screw and the first guide rod.

[0010] The depth of the connecting window and the inner cavity groove is greater than the height of the platform.

[0011] The protection component includes a damping swivel and a shielding cover. The damping swivel rotates around the center of the inner cavity groove and is arranged on the lower inner wall of the corresponding test cavity. The shielding cover is arranged on the upper end of the damping swivel through bolts. The shielding cover is an arc-shaped structure and is made of transparent explosion-proof composite glass.

[0012] The two test chambers are also provided with an over-temperature mechanism matching the placement table, the over-temperature mechanism includes an elastic bellows cover, a fixed ring, a second guide rod and a clamping piece, the over-temperature mechanisms in the upper and lower test chambers are respectively arranged on the lower inner wall and the upper inner wall in the corresponding chamber, the elastic bellows cover is fixedly connected to the inner wall in the corresponding chamber, the fixed ring is concentrically arranged with the table plate and connected to the other end of the corresponding elastic bellows cover, the number of the second guide rods is at least two and they are arranged between the upper and lower inner walls in the corresponding chamber, the second guide rod is slidably connected to the corresponding fixed ring, the clamping piece is arranged on the fixed ring and a circular plate with a larger diameter is provided with a clamping groove matching the clamping piece, the fixed ring is slidably engaged and sealed with the circular plate with the clamping groove.

[0013] The clamping component includes a first spring, a limiting slide, a locking tongue and a self-unlocking device. The corresponding circular plate is provided with an installation cavity corresponding to the clamping groove. A step ring is provided in the installation cavity. The limiting slide is slidably arranged in the installation cavity and is located on the side of the step ring away from the opening of the installation cavity. The first spring is arranged between the other end of the limiting slide and the inner wall of the installation cavity. The locking tongue is connected to the other end of the limiting slide and extends out of the installation cavity. The inclined surface of the locking tongue faces the side away from the connecting window. The self-unlocking device is arranged on the fixing ring and corresponds to the locking tongue.

[0014] The self-unlocking device includes a sliding rod, a second spring, a bracket and an end head. The bracket is fixedly arranged on the upper end of the fixing ring. The sliding rod is connected to the bracket by sliding up and down through a guide rib and penetrates the fixing ring and extends into the installation cavity. The sliding rod corresponds to the inclined end of the lock tongue. The end head is connected to an end of the sliding rod away from the lock tongue. The spring is sleeved on the sliding rod and is located between the end head and the bracket. A sliding groove matching the guide rib is opened on the side of the sliding rod, and the length of the sliding groove is less than the length of the sliding rod.

[0015] A method for explosion-proof testing comprises the following steps: adjusting a placement table to a corresponding test chamber according to the environmental requirements of the component to be tested, placing the component to be tested therein and pre-protecting it through a protective component, and then closing the chamber door for testing; when a high and low temperature impact test is required, the position of the placement table can be adjusted through a lifting component to adjust the component environment in a closed chamber, thereby avoiding the risk of opening the chamber to transfer the component; further, an over-temperature mechanism can synchronize the spatial change of the placement table to achieve the effect of temporarily cutting off the space through synchronous movement, thereby avoiding excessive variables in the test environment caused by direct connection of two test chambers.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] Through the setting of the rotating ring mechanism and the two test chambers with different temperature test environments opened in the box, the needs of different component test environments can be met more conveniently, quickly and safely. The environment can be switched directly during high and low temperature impact tests without the need to remove the test components and incur the risk of possible explosion or deflagration. The setting of the protection component can provide certain protection during the component testing process without affecting the component placement and automatically changing the test environment. The setting of the over-temperature mechanism can further reduce the impact of changes in the test environment and improve the accuracy of the test. At the same time, it can also provide certain protection during the component transfer process to reduce the impact caused by deflagration or explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further illustrated by means of the non-limiting examples given in the accompanying drawings.

[0019] Figure 1 The figure is a schematic structural diagram of an explosion-proof test box of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention after the box door is removed.

[0021] Figure 3 It is a structural cross-sectional view of the present invention.

[0022] Figure 4 for Figure 3 Schematic diagram at A in the middle.

[0023] Figure 5It is a schematic diagram of the structure of the conversion mechanism and the over-temperature mechanism of the present invention.

[0024] Box body 1, test cavity 11, connecting window 12, inner cavity groove 13, screw 2, first guide rod 21, connecting rod 22, circular plate 3, snap-in groove 31, damping swivel 4, shielding cover 41, elastic corrugated cover 5, fixing ring 51, second guide rod 52, first spring 6, limiting slide plate 61, locking tongue 62, installation cavity 63, step ring 64, sliding rod 7, second spring 71, bracket 72, end 73. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Example 1: Figure 1-5 As shown, an explosion-proof test box includes a box body 1 and a control panel. The box body 1 is provided with two test chambers 11 correspondingly distributed up and down. A heating mechanism and a cooling mechanism are respectively provided in the two test chambers 11. A conversion mechanism is provided between the two test chambers 11.

[0027] The box body 1 is provided with a connecting window 12 located between the two test chambers 11. The upper inner wall of the upper test chamber 11 and the lower inner wall of the lower test chamber 11 are both provided with inner cavity grooves 13. The conversion mechanism is slidable up and down in the connecting window 12. The conversion mechanism includes a lifting component, a protection component and a placement table. The lifting component is provided on the upper inner wall of the upper test chamber 11 and extends into the connecting window 12. There are two protection components and they are respectively provided on the lower inner walls of the two test chambers 11. The placement table is connected to the lifting component and is provided between the two test chambers 11.

[0028] The two test chambers 11 provided in the box 1 are used as a high temperature test chamber and a low temperature test chamber respectively. Different test chambers 11 can be flexibly used according to the needs of the test. When conducting the test, the lifting component is first started through the control panel according to the test item, and the placement table is adjusted to the corresponding test chamber 11, wherein the connecting window 12 is used to meet the position change of the placement table. The battery to be tested is placed in the corresponding test chamber 11 in the box 1 according to the test item, and the placement table is maintained and protected by the protection component, and then the box door of the box 1 is closed, and the temperature control device in the corresponding test chamber 11 is opened, that is, the ambient temperature in the test chamber 11 is adjusted by the heating mechanism or the cooling mechanism to achieve the test purpose of the ambient temperature change, wherein the box 1 is used to provide a closed test space, and the protection component is used to provide a buffer protection effect for the placement table, reducing the probability of direct impact on the box door of the box 1 when the test component has deflagration or explosion, resulting in the door collapse, impact opening and other dangerous situations, thereby reducing the destructiveness of adverse conditions during component testing to the test chamber;

[0029] Furthermore, in order to test the adaptability of the same component in different environments or to test shocking ambient temperature changes, the component will also be tested for conversion to high or low temperature environments. At this time, in order to reduce the delay failure problem that may occur when opening the box door when transferring components and the problem of data being affected by ambient temperature changes, the position of the placement table can be directly changed through the lifting assembly, that is, it can be lifted up and down to directly achieve the change of the test environment. Before that, the ambient temperature in the test chamber 11 can be pre-adjusted to achieve the effect of controlling and reducing environmental variables, and also to improve the safety during the test process.

[0030] The lifting assembly includes a motor, a screw 2 and a first guide rod 21. The motor is embedded in the upper end of the box body 1. The screw 2 is connected to the output shaft of the motor and rotates on the upper inner wall of the test chamber 11. There are at least two first guide rods 21. The screw 2 and the first guide rod 21 are equidistantly arranged around the circumference of the placement table behind the door side away from the box body 1. The placement table is connected to the screw 2 and the first guide rod 21.

[0031] When the motor starts, the screw rod 2 is controlled to rotate forward and reversely, and then the screw rod 2 is driven to generate a rotational force on the placement table. The corresponding first guide rod 21 can provide vertical guidance for the placement table, thereby forcing the placement table to only be able to move up and down.

[0032] The placing table includes a table top and a connecting rod 22. There are two table tops. The connecting rod 22 is arranged between the two table tops. There are several connecting rods 22 and they are evenly spaced around the circumference of the table top behind the door side away from the box body 1. The table top is composed of two concentrically overlapping circular plates 3 of different diameters. The circular plate 3 with a larger diameter matches the diameter of the connecting window 12 and is slidingly and sealingly connected to it. The upper table top is connected and matched with the screw 2 and the first guide rod 21.

[0033] The depth of the communication window 12 and the inner cavity groove 13 is greater than the height of the table.

[0034] The table plate with a larger diameter is used to cooperate with the connecting window 12. After entering the corresponding test cavity 11 upward or downward, the connecting window 12 is sealed by the table plate to reduce the temperature influence between the two test cavities 11. Furthermore, the depth of the connecting window 12 and the inner cavity groove 13 is greater than the combined height of the two table plates. In this way, during the test, the component is actually in a state of being sunken in the connecting window 12 or the inner cavity groove 13. Therefore, the shielding of the connecting window 12 and the inner cavity groove 13 can further reduce the impact of explosion or deflagration.

[0035] The protection assembly includes a damping swivel 4 and a shielding cover 41. The damping swivel 4 is rotatable around the center of the inner cavity groove 13 and is arranged on the lower inner wall of the corresponding test cavity 11. The shielding cover 41 is arranged on the upper end of the damping swivel 4 by bolts. The shielding cover 41 is an arc-shaped structure and is made of transparent explosion-proof composite glass.

[0036] The damping swivel 4 rotates around the placement table when rotating, and the direction corresponding to the notch of the shielding cover 41 can be adjusted to meet the shielding requirements during component placement or testing. The shielding cover 41 is made of transparent explosion-proof composite glass, which can play a certain explosion-proof shielding role and cooperate with the observation window on the door of the box body 1 for external observation during normal testing.

[0037] Example 2: Figure 2-3 and Figure 5 As shown, it is a further improvement on the basis of Example 1, the two test chambers 11 are also provided with an over-temperature mechanism matching the placement table, the over-temperature mechanism includes an elastic bellows cover 5, a fixed ring 51, a second guide rod 52 and a clamping piece, the over-temperature mechanisms in the upper and lower test chambers 11 are respectively arranged on the lower inner wall and the upper inner wall in the corresponding chamber, the elastic bellows cover 5 is fixedly connected to the inner wall in the corresponding chamber, the fixed ring 51 is concentrically arranged with the table and connected to the other end of the corresponding elastic bellows cover 5, the number of the second guide rods 52 is at least two and is arranged between the upper and lower inner walls in the corresponding chamber, the second guide rod 52 is slidably connected with the corresponding fixing ring 51, the clamping piece is arranged on the fixing ring 51 and the circular plate 3 with a larger diameter is provided with a clamping groove 31 matching the clamping piece, and the fixing ring 51 is slidably engaged and sealed with the circular plate 3 with the clamping groove 31.

[0038] The clamping part includes a first spring 6, a limiting slide 61, a locking tongue 62 and a self-unlocking device. The corresponding circular plate 3 is provided with an installation cavity 63 corresponding to the clamping groove 31. A step ring 64 is provided in the installation cavity 63. The limiting slide 61 is slidably arranged in the installation cavity 63 and is located on the side of the step ring 64 away from the opening of the installation cavity 63. The first spring 6 is arranged between the other end of the limiting slide 61 and the inner wall of the installation cavity 63. The locking tongue 62 is connected to the other end of the limiting slide 61 and extends out of the installation cavity 63. The inclined surface of the locking tongue 62 faces the side away from the connecting window 12. The self-unlocking device is arranged on the fixing ring 51 and corresponds to the locking tongue 62.

[0039] The self-unlocking device includes a slide rod 7, a second spring 71, a bracket 72 and an end 73. The bracket 72 is fixedly arranged on the upper end of the fixing ring 51. The slide rod 7 is connected to the bracket 72 by sliding up and down through the guide rib and penetrates the fixing ring 51 and extends into the installation cavity 63. The slide rod 7 corresponds to the inclined end of the lock tongue 62. The end 73 is connected to the end of the slide rod 7 away from the lock tongue 62. The spring is sleeved on the slide rod 7 and is located between the end 73 and the bracket 72. A slide groove matching the guide rib is opened on the side of the slide rod 7, and the length of the slide groove is less than the length of the slide rod 7.

[0040] In order to further improve the accuracy of the test data and reduce the mutual influence of the temperature between the two chambers, the over-temperature mechanism can provide a certain environmental sealing restriction during the transfer of components between the two chambers. When the placement table moves, it will be connected to the lock tongue 62 in the clamping part on the fixing ring 51 through the clamping groove 31 opened on the circular plate 3, so that the fixing ring 51 is pulled through the circular plate 3. Since the inclined surface of the lock tongue 62 faces the opposite direction to the actual test chamber 11 of the placement table, that is, the plane end of the lock tongue 62 will correspond to the opposite direction of the movement direction of the test chamber 11 that the placement table needs to change to the test, thereby ensuring the stability of the traction of the fixing ring 51 during the change of the placement table position. When the fixing ring 51 moves synchronously, the elastic corrugated cover 5 will be unfolded, thereby covering the exposed part of the placement table, that is, covering the gap of the connecting window 12, to prevent the cross-flow of ambient air from affecting the test effect;

[0041] When the placement table moves to the designated position of the corresponding test cavity 11, that is, when it is about to reach the upper end or the lower end of the test cavity 11, the circular plate 3 has closed the connecting window 12, and the slide bar 7 in the self-unlocking device is blocked by the inner wall of the test cavity 11, slides toward the side of the installation cavity 63 and squeezes the lock tongue 62, so that the lock tongue 62 is gradually retracted into the installation cavity 63 and disconnected from the circular table. At this time, the elastic bellows 5 can be reset by its own elastic force. Of course, a spring located between the fixing ring 51 and the inner wall of the corresponding test cavity 11 can also be set on the second guide rod 52 to achieve a more effective reset effect.

[0042] In order to further cope with the risk of deflagration or explosion caused by sudden environmental changes, an elastic metal mesh can be arranged on the outside of the elastic bellows 5, wherein the elastic metal mesh refers to a cylindrical mesh structure woven from multiple metal wires, which has a certain ductility. In this way, before the element is completely transferred to the test chamber 11, the elastic metal mesh can also block and protect against possible explosions, thereby further achieving an explosion-proof effect.

[0043] A method for explosion-proof testing, according to the environmental requirements of the component to be tested, a placement table is adjusted to a corresponding test chamber 11, and then the component to be tested is placed and pre-protected by a protection component, and then the box door is closed for testing; when a high and low temperature impact test is required, the position of the placement table can be adjusted by a lifting component to achieve component environment adjustment in a closed box 1, thereby avoiding the risk of opening the box 1 and then transferring the component; further, an over-temperature mechanism can synchronize the spatial change of the placement table to achieve the effect of temporarily cutting off the space by synchronous movement, thereby avoiding the direct connection of two test chambers 11 causing excessive variables in the test environment.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An explosion-proof test box, comprising a box body and a control panel, characterized in that: The box body is provided with two test chambers correspondingly distributed up and down, a heating mechanism and a cooling mechanism are respectively provided in the two test chambers, and a conversion mechanism is provided between the two test chambers; The box body is provided with a connecting window between the two test chambers, the upper inner wall of the upper test chamber and the lower inner wall of the lower test chamber are both provided with inner chamber grooves, the conversion mechanism is slid up and down and is arranged in the connecting window, the conversion mechanism includes a lifting component, a protection component and a placement table, the lifting component is arranged on the upper inner wall of the upper test chamber and extends into the connecting window, the number of the protection components is two and they are respectively arranged on the lower inner walls of the two test chambers, and the placement table is connected to the lifting component and is arranged between the two test chambers; The placing table includes a table plate and a connecting rod, the number of the table plates is two, the connecting rod is arranged between the two table plates, the number of the connecting rods is several and is arranged equidistantly around the circumference of the table plate behind the door side away from the box body, the table plate is composed of two concentrically overlapping circular plates of different diameters, the circular plate with a larger diameter matches the diameter of the connecting window and is slidably sealed therewith, and the table plate on the upper side is connected and matched with the screw rod and the first guide rod; The two test chambers are also provided with an over-temperature mechanism matching the placement table, the over-temperature mechanism includes an elastic bellows cover, a fixed ring, a second guide rod and a clamping piece, the over-temperature mechanisms in the upper and lower test chambers are respectively arranged on the lower inner wall and the upper inner wall in the corresponding chamber, the elastic bellows cover is fixedly connected to the inner wall in the corresponding chamber, the fixed ring is concentrically arranged with the table and connected to the other end of the corresponding elastic bellows cover, the number of the second guide rods is at least two and they are arranged between the upper and lower inner walls in the corresponding chamber, the second guide rod is slidably connected with the corresponding fixed ring, the clamping piece is arranged on the fixed ring and a circular plate with a larger diameter is provided with a clamping groove matching the clamping piece, the fixed ring is slidably engaged and sealed with the circular plate with the clamping groove; The clamping component includes a first spring, a limiting slide, a locking tongue and a self-unlocking device. The corresponding circular plate is provided with an installation cavity corresponding to the clamping groove. A step ring is provided in the installation cavity. The limiting slide is slidably arranged in the installation cavity and is located on the side of the step ring away from the opening of the installation cavity. The first spring is arranged between the other end of the limiting slide and the inner wall of the installation cavity. The locking tongue is connected to the other end of the limiting slide and extends out of the installation cavity. The inclined surface of the locking tongue faces the side away from the connecting window. The self-unlocking device is arranged on the fixing ring and corresponds to the locking tongue.

2. The explosion-proof test chamber according to claim 1, characterized in that: The lifting assembly includes a motor, a screw and a first guide rod. The motor is embedded in the upper end of the box body. The screw is connected to the output shaft of the motor and rotates the upper inner wall of the test chamber on the upper side. The number of the first guide rods is at least two. The screw and the first guide rod are equidistantly arranged around the circumference of the placement table behind the door side away from the box body. The placement table is connected to the screw and the first guide rod.

3. An explosion-proof test box according to claim 2, characterized in that: The depth of the connecting window and the inner cavity groove is greater than the height of the platform.

4. The explosion-proof test box according to claim 3, characterized in that: The protection component includes a damping swivel and a shielding cover. The damping swivel rotates around the center of the inner cavity groove and is arranged on the lower inner wall of the corresponding test cavity. The shielding cover is arranged on the upper end of the damping swivel through bolts. The shielding cover is an arc-shaped structure and is made of transparent explosion-proof composite glass.

5. The explosion-proof test box according to claim 4, characterized in that: The self-unlocking device includes a sliding rod, a second spring, a bracket and an end head. The bracket is fixedly arranged on the upper end of the fixing ring. The sliding rod is connected to the bracket by sliding up and down through a guide rib and penetrates the fixing ring and extends into the installation cavity. The sliding rod corresponds to the inclined end of the lock tongue. The end head is connected to an end of the sliding rod away from the lock tongue. The spring is sleeved on the sliding rod and is located between the end head and the bracket. A sliding groove matching the guide rib is opened on the side of the sliding rod, and the length of the sliding groove is less than the length of the sliding rod.

6. An explosion-proof test method, characterized in that: The explosion-proof test is carried out using the test chamber described in any one of claims 1 to 5, and the specific steps are as follows: According to the environmental requirements of the component test, the placement table is adjusted to the corresponding test chamber, and then the component to be tested is placed and pre-protected by the protection component, and then the box door is closed for testing; when high and low temperature impact testing is required, the position of the placement table can be adjusted by the lifting component to achieve component environment adjustment in the closed box, thereby avoiding the risks that may arise from opening the box and then transferring the component; further, the over-temperature mechanism can synchronize the spatial changes of the placement table to achieve the effect of temporarily cutting off the space by synchronous movement, thereby avoiding the direct connection of the two test chambers causing excessive variables in the test environment.

Images