An explosion-proof test box

Abstract

This invention discloses an explosion-proof test chamber, including a chamber body and a door. One side of the door is hinged to the chamber body. It also includes a first locking assembly and a second locking assembly. The first locking assembly is mounted on the door, and the second locking assembly is mounted on the chamber body. The first and second locking assemblies are engaged to lock the chamber. This invention features a two-stage explosion-proof mechanism. A pressure relief assembly is installed at the top, opening before the second locking assembly. This allows for timely pressure relief during the initial stage of pressure increase inside the chamber, reducing the pressure peak and minimizing impact on the chamber body and locking assemblies, thus preventing deformation or damage to the chamber body. The second stage utilizes the cooperation of the first and second locking assemblies. Through the design of the shearing screw and blade, when a large pressure is generated instantaneously inside the chamber, the outward pushing force of the door drives the blade to shear the screw, separating the second mounting base from the chamber body and safely unlocking the door. This prevents the door from violently opening due to forced breakage of the lock.

Description

Technical Field

[0001] This invention relates to the field of testing equipment, and in particular to an explosion-proof test chamber. Background Technology

[0002] In the research and development and production processes of new energy, chemical industry, and materials, it is often necessary to conduct performance tests on various samples under simulated extreme environments. During the testing process, some samples may generate a large amount of gas and high pressure instantaneously due to thermal runaway, violent reactions, or other reasons, which can easily lead to an explosion and pose a serious threat to the testing equipment and operators. Therefore, explosion-proof test chambers, as a specialized safety testing device, are widely used in such scenarios.

[0003] Existing explosion-proof test chambers typically only have safety valves as pressure relief ports. However, the instantaneous pressure relief capacity of these safety valves is small and cannot be released in time, leading to deformation and damage to the chamber. In addition, when a large pressure is generated instantaneously inside the test chamber, the locks can easily be broken, causing the chamber door to violently open. The opened door or flying debris can cause secondary injuries to surrounding equipment and personnel.

[0004] In view of the shortcomings of the existing technology, there is an urgent need for an explosion-proof test chamber with a reasonable structure, reliable explosion-proof performance and strong applicability, so as to solve the problems of insufficient safety protection and inconvenient adjustment of existing equipment. Summary of the Invention

[0005] In view of the above-mentioned defects in the prior art, the main objective of the present invention is to overcome the shortcomings of the prior art and disclose an explosion-proof test chamber, including a chamber body and a door. One side of the door is hinged to the chamber body by a hinge. The chamber also includes a first lock assembly and a second lock assembly. The first lock assembly is disposed on the door and the second lock assembly is disposed on the chamber body. The first lock assembly and the second lock assembly are engaged to complete the locking.

[0006] The first lock assembly includes a first mounting base, a latch, and a handle. A locking groove protrudes from one side of the first mounting base. The latch is rotatably mounted in the first mounting base by a torsion spring. The handle is connected to the latch, and the latch is driven to rotate by the handle. A hook-shaped portion is provided at the end of the latch, and the locking groove and the hook-shaped portion form a closed locking area.

[0007] The second lock assembly includes a second mounting base and a lock cover. The second mounting base is provided with a lock pin and at least two fixing holes. A shear screw is installed in the fixing holes, and a cutting edge is provided on the inner wall of the fixing holes, which acts on the shear screw. The lock cover is fitted onto the second mounting base and is securely connected to the second mounting base. An opening is provided on one side of the lock cover to allow the lock groove and the latch to pass through.

[0008] After the first locking assembly and the second locking assembly are locked, the locking pin is located within the locking area; when a large pressure is generated instantaneously inside the explosion-proof test chamber, it will push the chamber door to open outward and drive the blade to cut the shearing screw, so that the shearing screw breaks and the second mounting base separates from the chamber body.

[0009] Furthermore, it also includes a connecting component that connects the second lock assembly and the housing, and uses the connecting component to limit and restrict the maximum opening angle of the housing door.

[0010] Furthermore, the connecting assembly includes a first connecting seat, a second connecting seat, a connecting plate, a first limiting pin, a first spring, and a guide cover. The first connecting seat is fixed on the second lock assembly, the second connecting seat is disposed on the housing, one end of the connecting plate is hinged to the first connecting seat, and the second connecting seat is provided with a through guide groove that allows the connecting plate to pass through. The guide groove is provided with a first support hole and a second support hole on both sides.

[0011] One end of the first limiting pin has a tapered structure, and the other end extends radially to form a limiting edge; the guide cover is axially recessed to accommodate the first spring, the guide cover is disposed on the second connecting seat, the first spring is disposed in the cavity and acts on the limiting edge, and the first spring provides axial thrust to the first limiting pin; the first limiting pin is placed in the first support hole; the connecting plate is correspondingly provided with a first limiting hole; when locked, the first limiting pin connects the first support hole, the first limiting hole and the second support hole.

[0012] Furthermore, the first limiting pin has a first guide portion extending axially from one end of the limiting edge, and the guide cover has a first guide hole that mates with the first guide portion. The first guide portion is slidably connected to the first guide hole, and the first spring is sleeved on the first guide portion, which guides the first spring to compress and unfold. When the first limiting pin is in the locked position, the first guide portion protrudes from the guide cover, so that the first limiting pin can be driven to move axially by lifting the first guide portion.

[0013] Furthermore, a first connecting portion and a second connecting portion protrude from both sides of the first connecting seat, and a first connecting hole and a second connecting hole are correspondingly provided on the first connecting portion and the second connecting portion. The first connecting hole is a screw hole and the second connecting hole is a smooth hole. A third connecting hole is provided on the connecting plate, and the third connecting hole is a smooth hole. The connecting plate and the first connecting seat are hinged by a hinge rod.

[0014] The hinge rod includes a gripping part, a fixing part, and a hinge part that are continuously arranged axially. The fixing part is threadedly engaged with the first connecting hole. The hinge part is a smooth rod. In use, the gripping part is driven to rotate the fixing part, so that the hinge rod is fixed to the first mounting base. The end of the hinge part is placed in the second connecting hole. The connecting plate is rotatably connected to the hinge part through the third connecting hole.

[0015] Furthermore, a fourth connecting hole is provided at the tail end of the connecting plate, and a second limiting pin is provided in the fourth connecting hole, the second limiting pin being tightly fitted with the fourth connecting hole.

[0016] Furthermore, an opening is provided at the top of the enclosure, and an explosion venting assembly is installed at the opening to depressurize the interior of the enclosure; the explosion venting assembly opens before the second locking assembly.

[0017] The explosion venting assembly includes an inner explosion venting cover, an outer explosion venting cover, guide rods, and a sealing cover. At least four guide rods are provided, positioned circumferentially around the opening. The sealing cover is slidably connected to the guide rods. The outer explosion venting cover is positioned outside the opening, and the inner explosion venting cover is positioned inside the opening. Both the inner and outer explosion venting covers have several vent holes. The sealing cover has a stepped structure circumferentially, and a sealing strip is provided around the contact surface between the sealing cover and the upper surface of the opening.

[0018] Furthermore, the guide rod includes a continuously arranged driving part, a second guide part, and a threaded part. The threaded part is threadedly connected to the housing. The second guide part is a smooth rod with a mounting hole. The mounting hole is obliquely oriented and contains a steel ball and a second spring. The steel ball and the second spring are disposed within the mounting hole, and a plug is provided at the tail end of the mounting hole. The second spring acts on the steel ball, causing the steel ball to protrude from the front end of the mounting hole. When the sealing cover moves upward, it pushes the steel ball to move obliquely upward along the mounting hole to be hidden within the mounting hole. As the sealing cover continues to move upward, the steel ball resets under the action of the second spring to prevent the sealing cover from falling back.

[0019] Furthermore, the box is provided with wall-mounting strips, support strips and basket racks. The wall-mounting strips are arranged on opposite sides of the box, and two wall-mounting strips are spaced apart on each side. The support strips are snapped onto the wall-mounting strips, and the two sides of the basket rack are placed on the support strips.

[0020] The wall-mounting strip has several vertically arranged hanging holes, and there is a gap between the hanging holes and the inner wall of the box in the circumferential direction; the hanging holes are square holes.

[0021] The support bar includes a mounting plate and a first support plate. The first support plate is horizontally arranged and fixed to the mounting plate. A first clip and a second clip are spaced apart on the mounting plate. The upper edge of the first clip is connected to the mounting plate, and the side edge of the second clip is connected to the mounting plate. The first clip is located near the door of the test chamber.

[0022] In use, the second clip is inserted into the hanging hole of the inner wall-mounted strip, and the upper and lower side walls of the second clip cooperate with the upper and lower side edges of the hanging hole to restrict the upper and lower movement of the second clip; then the first clip is inserted into the hanging hole of the outer wall-mounted strip, and the left and right sides of the first clip cooperate with the left and right side edges of the hanging hole to restrict the left and right movement of the first clip.

[0023] Furthermore, the first card and the second card have a square structure; the first card, the second card, and the mounting plate are an integral structure.

[0024] The beneficial effects achieved by this invention are as follows:

[0025] 1. Reliable explosion-proof performance: This invention features a two-stage explosion-proof mechanism with a top-mounted explosion-proof component that opens before the second locking assembly. This allows for timely pressure relief during the initial stage of pressure increase within the enclosure, reducing the peak pressure and minimizing impact on the enclosure and locking assembly, thus preventing deformation or damage to the enclosure. Simultaneously, the steel ball and second spring structure on the guide rod ensure positioning after the sealing cover moves upwards to prevent it from falling back and blocking the explosion-proof channel, ensuring continuous and effective explosion-proof performance.

[0026] The second-level mechanism uses a combination of the first and second locking components. Through the design of the shearing screw and the blade, when a large pressure is generated instantly inside the box, the outward pushing force of the box door can drive the blade to shear the screw, causing the second mounting base to separate from the box body. This achieves safe unlocking of the box door and prevents the box door from violently opening due to the lock being forcibly broken. At the same time, the connecting component limits the maximum opening angle of the box door, further improving the safety protection effect and preventing secondary injuries.

[0027] 2. Convenient sample placement: The chamber is equipped with adjustable wall-mounting strips, support strips, and a basket rack. The support strips engage with the hanging holes of the wall-mounting strips via first and second clips, allowing for flexible adjustment of the height and position of the support strips according to the sample size, adapting to the testing needs of samples of different specifications. The basket rack, in conjunction with the support strips, employs a pull-out placement structure, which is convenient and reliable. The engagement direction of the first and second clips prevents the basket rack from tilting during the pulling process, ensuring reliable use. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an explosion-proof test chamber according to the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the first lock assembly;

[0030] Figure 3 This is a three-dimensional structural diagram of the second lock assembly;

[0031] Figure 4 This is a three-dimensional structural diagram of the second mounting base;

[0032] Figure 5 This is a schematic diagram showing the fit between the second mounting bracket and the shear screw;

[0033] Figure 6 This is a schematic diagram showing the interaction between the connecting component and the second lock component;

[0034] Figure 7 This is a cross-sectional view of the second lock assembly;

[0035] Figure 8 for Figure 7 Enlarged view of A in the middle;

[0036] Figure 9 This is a three-dimensional structural diagram of the first connecting seat;

[0037] Figure 10 This is a schematic diagram of the three-dimensional structure of the connecting plate;

[0038] Figure 11 This is a three-dimensional structural diagram of the hinge rod;

[0039] Figure 12 This is a three-dimensional structural diagram of the explosion venting assembly;

[0040] Figure 13 This is a schematic diagram showing the fit between the sealing cap and the guide rod.

[0041] Figure 14 This is a sectional view of the guide rod;

[0042] Figure 15 for Figure 14 Enlarged view of A in the middle;

[0043] Figure 16 This is a structural diagram of the components mounted inside the box;

[0044] Figure 17 This is a schematic diagram showing the fit between the wall-mounting strip and the support strip;

[0045] Figure 18 for Figure 17 Enlarged view of A in the middle;

[0046] Figure 19 for Figure 17 Enlarged view of B in the middle;

[0047] Figure 20 This is a schematic diagram of the three-dimensional structure of the support bar;

[0048] Figure 21 for Figure 20 Enlarged view of A in the middle;

[0049] Figure 22 for Figure 20 Enlarged view of B in the middle;

[0050] Figure 23 This is a force analysis diagram when the basketball hoop is pulled out.

[0051] The attached figures are labeled as follows:

[0052] 1. Box body; 2. Box door; 4. First lock assembly; 41. First mounting base; 42. Locking buckle; 43. Handle; 44. Lock groove; 46. Hook-shaped part; 5. Second lock assembly; 51. Second mounting base; 52. Lock outer cover; 53. Lock pin; 54. Fixing hole; 55. Shear screw; 56. Blade; 57. Opening; 6. Connecting assembly; 61. First connecting base; 62. Second connecting base; 63. Connecting plate; 64. First limiting pin; 65. First spring; 66. Guide cover; 67. Guide groove; 68. First support hole; 69. Second support hole; 610. Limiting edge; 611. Cavity; 612. First limiting hole; 613. First guide part; 614. First guide hole; 615. First connecting part; 616. 617. Second connecting part; 618. First connecting hole; 619. Second connecting hole; 620. Third connecting hole; 621. Hinge rod; 622. Grip part; 623. Fixing part; 624. Hinge part; 625. Fourth connecting hole; 626. Second limiting pin; 7. Explosion relief assembly; 71. Explosion relief inner cover; 72. Explosion relief outer cover; 73. Guide rod; 74. Sealing cover; 75. Vent hole; 76. Stepped structure; 78. Drive part; 79. Second guide part; 710. Threaded part; 711. Mounting hole; 712. Steel ball; 713. Second spring; 714. Plug; 8. Wall hanging strip; 81. Hanging hole; 9. Support strip; 91. Hanging plate; 92. First support plate; 93. First clip; 94. Second clip; 10. Basket frame. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0054] An explosion-proof test chamber, such as Figures 1-11As shown, the device includes a housing 1 and a door 2. One side of the door 2 is hinged to the housing 1, facilitating the opening and closing of the door 2 for sample loading and unloading and testing. To enhance explosion-proof safety during testing, the device also includes a first locking assembly 4 and a second locking assembly 5. The first locking assembly 4 is fixedly installed at the free end of the door 2 (the end away from the hinge), and the second locking assembly 5 is correspondingly fixedly installed at the opening edge of the housing 1. The first locking assembly 4 and the second locking assembly 5 are engaged to lock the door 2 to the housing 1, ensuring the sealing and closure of the housing 1 during testing.

[0055] Specifically, the first lock assembly 4 includes a first mounting base 41, a latch 42, and a handle 43. The first mounting base 41 is fixed to the door 2 by bolts. A U-shaped locking groove 44 is integrally formed on one side of the first mounting base 41. The latch 42 is rotatably mounted in the first mounting base 41 by a torsion spring. One end of the torsion spring is connected to the first mounting base 41, and the other end is connected to the latch 42, providing a return spring force for the latch 42. The handle 43 is fixedly connected to the middle of the latch 42. By rotating the handle 43, the latch 42 can be driven to rotate around the mounting axis of the torsion spring. A hook-shaped part 46 is integrally formed at the end of the latch 42. The hook-shaped part 46 is opposite to the locking groove 44. When the latch 42 is rotated to the locked position, the hook-shaped part 46 and the locking groove 44 enclose a closed locking area for cooperation with the second lock assembly 5 to achieve locking.

[0056] The second lock assembly 5 includes a second mounting base 51 and a lock cover 52. The second mounting base 51 is fitted to the edge of the opening of the housing 1. A locking pin 53 and at least two fixing holes 54 are integrally formed on the second mounting base 51. The size of the locking pin 53 is adapted to the size of the locking area for embedding within the locking area to achieve a latching connection. The fixing holes 54 are symmetrically arranged on both sides of the locking pin 53. Shear screws 55 are installed in the fixing holes 54, and the screws of the shear screws 55 pass through the fixing holes 54 and are threadedly connected to the housing 1, thus fixing the second mounting base 51 to the housing 1. The inner wall of the fixed hole 54 is integrally provided with a cutting edge 56. The cutting edge 56 has a ring-shaped sharp structure and fits against the outer periphery of the shear screw 55. It can shear the shear screw 55 when subjected to external force. The lock cover 52 is bolted to the second mounting base 51 to protect the second mounting base 51, the lock pin 53 and the shear screw 55. An opening 57 is provided on one side of the lock cover 52. The size of the opening 57 is adapted to the size of the lock groove 44 and the lock buckle 42, allowing the lock groove 44 and the lock buckle 42 to pass through the opening 57 and cooperate with the lock pin 53.

[0057] When the first locking assembly 4 and the second locking assembly 5 are locked, turn the handle 43 to drive the latch 42 to rotate, so that the locking pin 53 passes through the opening 57 and enters the locking groove 44. Release the handle 43, and under the reset action of the torsion spring, the latch 42 rotates, and the hook-shaped part 46 surrounds the locking groove 44, locking the locking pin 53 in the locking area, thus completing the locking of the door 2. When a large pressure is generated instantaneously inside the explosion-proof test chamber, the pressure pushes the door 2 to open outward, and the door 2 drives the first locking assembly 4 to move outward. The first locking assembly 4 drives the second mounting base 51 to move outward through the locking pin 53. At this time, the blade 56 on the inner wall of the fixing hole 54 is subjected to the reaction force of the shearing screw 55, which shears the shearing screw 55, causing the shearing screw 55 to break. The second mounting base 51 separates from the chamber body 1, and the door 2 can be safely opened, realizing the pressure release and preventing the lock from being forcibly broken.

[0058] In the above embodiments, the number of shearing screws is determined according to the actual needs and the safety pressure value of the test chamber; and the shearing pressure required for different specifications of shearing screws is different. Therefore, the number of shearing screws is determined based on the conventional knowledge of those skilled in the art, and will not be elaborated here.

[0059] To limit the maximum angle of the door 2 when it is opened and to prevent the door 2 from opening excessively and causing secondary damage, a connecting component 6 is also included. The connecting component 6 connects the second lock component 5 and the box body 1. Through the limiting function of the connecting component 6, the maximum opening angle of the door 2 is controlled, and at the same time, it plays an auxiliary supporting role when the door 2 is opened and closed normally.

[0060] Specifically, the connecting assembly 6 includes a first connecting seat 61, a second connecting seat 62, a connecting plate 63, a first limiting pin 64, a first spring 65, and a guide cover 66. The first connecting seat 61 is bolted to the outside of the second mounting base 51, and the second connecting seat 62 is bolted to the outside of the housing 1 and is positioned opposite to the first connecting seat 61. One end of the connecting plate 63 is hinged to the first connecting seat 61, and the other end of the connecting plate 63 passes through the second connecting seat 62, allowing it to move relative to the second connecting seat 62. A through-hole is provided on the second connecting seat 62. The guide groove 67 is adapted to the size of the connecting plate 63 (a gap is set between the connecting plate 63 and the guide groove 67. Since the door 2 rotates horizontally when it is opened, it will cause the connecting plate to shift horizontally when it moves. The gap is used to compensate for this and prevent the connecting plate 63 from moving poorly in the guide groove 67). The guide groove 67 allows the connecting plate 63 to pass through and move along the guide groove 67. The first support hole 68 and the second support hole 69 are symmetrically arranged on both sides of the guide groove 67. Both the first support hole 68 and the second support hole 69 are connected to the guide groove 67.

[0061] One end of the first limiting pin 64 has a tapered structure, which facilitates insertion into the limiting hole and the second support hole 69. The other end extends radially and is provided with a limiting edge 610, which is used to limit the axial movement of the first limiting pin 64. The second connecting seat 62 has a recessed countersunk hole, and the inner wall of the countersunk hole is provided with an internal thread. The outer side of the guide cover 66 is provided with an external thread. The guide cover 66 is threadedly connected to the countersunk hole so that the guide cover 66 is fixed on the second connecting seat 62. The guide cover 66 has an axially recessed cavity 611, which is used to accommodate the first spring 65. The first spring 65 is disposed in the cavity 611, with one end abutting against the bottom of the cavity 611 and the other end abutting against the limiting edge 610. The first spring 65 provides an axial thrust to the first limiting pin 64, keeping the first limiting pin 64 in the inserted state. The first limiting pin 64 is placed in the first support hole 68, and the connecting plate 63 is correspondingly provided with a first limiting hole 612. When the door 2 is locked, the first limiting pin 64, under the thrust of the first spring 65, passes through the first support hole 68, the first limiting hole 612, and the second support hole 69 in sequence, locking the connecting plate 63 onto the second connecting seat 62, thereby locking the connecting assembly 6. When the door 2 needs to be opened, the first limiting pin 64 is driven to compress the first spring 65, causing the first limiting pin 64 to disengage from the second support hole 69 and the first limiting hole 612, thus pushing the door 2 open.

[0062] To improve the movement stability of the first limiting pin 64 and prevent the first spring 65 from deviating, a first guide portion 613 is axially extended from one end of the limiting edge 610 of the first limiting pin 64. A first guide hole 614 is correspondingly provided on the guide cover 66. The first guide portion 613 is slidably connected to the first guide hole 614. The first spring 65 is sleeved on the first guide portion 613. The compression and expansion of the first spring 65 are guided by the first guide portion 613 to ensure accurate axial movement of the first limiting pin 64. When the first limiting pin 64 is in the locked position, the first guide portion 613 protrudes from the guide cover 66, making it easier for the operator to lift the first guide portion 613 and drive the first limiting pin 64 to move axially, making the operation more convenient.

[0063] The first connecting seat 61 has an integrally protruding first connecting portion 615 and second connecting portion 616 on both sides. The first connecting portion 615 and the second connecting portion 616 are respectively provided with a first connecting hole 617 and a second connecting hole 618. The first connecting hole 617 is a threaded hole, and the second connecting hole 618 is a smooth hole. One end of the connecting plate 63 is provided with a third connecting hole 619, which is also a smooth hole. The connecting plate 63 is hinged to the first connecting seat 61 via a hinge rod 620. The hinge rod 620 includes an axially continuous gripping portion 621, a fixing portion 622, and a hinge portion 623. The gripping portion 621 has a hexagonal structure, facilitating tool-driven or manual drive. The fixing portion 622 has an external thread on its outer periphery, which engages with the first connecting hole 617. The hinge portion 623 is a smooth hole. The rod has a diameter that matches the diameters of the second connecting hole 618 and the third connecting hole 619. In use, one end of the connecting plate 63 is placed between the first connecting part 615 and the second connecting part 616, so that the third connecting hole 619 is aligned with the first connecting hole 617 and the second connecting hole 618. The hinge part 623 of the hinge rod 620 is passed through the second connecting hole 618 and the third connecting hole 619 in sequence. The gripping part 621 is rotated, which drives the fixing part 622 to rotate, so that the fixing part 622 is threadedly fastened to the first connecting hole 617. At this time, the end of the hinge part 623 is placed in the second connecting hole 618. The connecting plate 63 is rotatably connected to the hinge part 623 through the third connecting hole 619, realizing the hinge between the connecting plate 63 and the first connecting seat 61. The structure is stable and easy to disassemble and assemble.

[0064] To further enhance the limiting effect of the connecting component 6 and prevent the connecting plate 63 from detaching from the guide groove 67, a fourth connecting hole 624 is provided at the tail end of the connecting plate 63. A second limiting pin 625 is provided in the fourth connecting hole 624. The second limiting pin 625 is tightly fitted with the fourth connecting hole 624. The diameter of the second limiting pin 625 is larger than the width of the guide groove 67, which can limit the maximum travel of the connecting plate 63 and prevent the connecting plate 63 from detaching from the guide groove 67.

[0065] To achieve timely pressure relief within the chamber and reduce pressure peaks, such as Figures 12-15 As shown, an opening is provided at the top of the box 1, and an explosion relief component 7 is installed at the opening. The explosion relief component 7 is used to relieve pressure inside the box 1, and the explosion relief component 7 opens before the second locking component 5. Pressure relief can be achieved in the early stage of pressure increase inside the box, reducing the impact on the locking component and the box 1.

[0066] Specifically, the explosion venting assembly 7 includes an inner explosion venting cover 71, an outer explosion venting cover 72, guide rods 73, and a sealing cover 74. At least four guide rods 73 are evenly distributed around the opening. The lower ends of the guide rods 73 are fixedly connected to the housing 1. The sealing cover 74 has corresponding guide holes and is slidably connected to the guide rods 73 through these guide holes, allowing it to move up and down along the guide rods 73. The outer explosion venting cover 72 is fixed to the outside of the opening with bolts, and the inner explosion venting cover 71 is fixed to the inside of the opening with bolts. Both 71 and the explosion-proof cover 72 are provided with several vent holes 75. The vent holes 75 are used to allow gas to flow inside and outside the chamber 1, which facilitates explosion venting and pressure relief. The sealing cover 74 is provided with a stepped structure 76 in the circumference. The stepped structure 76 fits against the upper surface of the opening. The contact surface between the sealing cover 74 and the upper surface of the opening is provided with a sealing strip. The sealing strip is made of high-temperature resistant and corrosion-resistant silicone rubber, which can improve the sealing performance between the sealing cover 74 and the chamber 1, prevent the leakage of the test medium, and ensure the sealing of the test.

[0067] The guide rod 73 includes a continuously arranged driving part 78, a second guide part 79, and a threaded part 710. The threaded part 710 is threadedly connected to the threaded hole of the housing 1 to fix the guide rod 73 to the housing 1. The second guide part 79 is a smooth rod used to guide the sliding of the sealing cover 74. The second guide part 79 is provided with a mounting hole 711, which is obliquely arranged. A steel ball 712 and a second spring 713 are placed in the mounting hole 711. A plug 714 is provided at the tail of the mounting hole 711. The plug 714 is fixed to the mounting hole 711 by threads to seal the tail of the mounting hole 711 and prevent the steel ball 712 and the second spring 713 from coming out. One end of the second spring 713 abuts against the plug 714, and the other end abuts against the steel ball 712. Under the action of the second spring 713, a portion of the steel ball 712 protrudes from the front end of the mounting hole 711 and abuts against the lower surface of the sealing cover 74. When the pressure inside the housing 1 increases, the pressure pushes the sealing cover 74 upward, and the lower surface of the sealing cover 74 squeezes the steel ball 712, pushing the steel ball 712 to move obliquely upward along the mounting hole 711 and hide inside the mounting hole 711. The sealing cover 74 continues to move upward. When the sealing cover 74 moves above the steel ball 712, the steel ball 712 resets under the action of the second spring 713 and protrudes from the front end of the mounting hole 711. At this time, the steel ball 712 abuts against the upper surface of the sealing cover 74, preventing the sealing cover 74 from falling back under the action of gravity, ensuring that the explosion relief channel remains unobstructed, and achieving effective pressure relief.

[0068] To facilitate the placement of test samples and allow for flexible adjustment of the placement height according to sample size, such as Figure 16-23As shown, the box 1 is equipped with wall-mounting strips 8, support strips 9, and a basket frame 10. The wall-mounting strips 8 are fixed to the opposite side walls inside the box 1 by bolts, and two wall-mounting strips 8 are spaced apart on each side. The two wall-mounting strips 8 are arranged in parallel. The support strips 9 are snapped onto the corresponding wall-mounting strips 8 on both sides. The two sides of the basket frame 10 are placed on the support strips 9. The basket frame 10 is used to place test samples, and the support strips 9 provide support for the basket frame 10.

[0069] A plurality of hanging holes 81 are evenly arranged vertically on the wall-mounting strip 8. The hanging holes 81 are square holes, and a gap is provided between the hanging holes 81 and the inner wall of the chamber 1 around the circumference. This gap allows the support strip 9 to have a hanging space with the hanging holes 81. The support strip 9 includes a hanging plate 91 and a first support plate 92. The first support plate 92 is horizontally arranged and is integrally fixedly connected to the hanging plate 91 to form an L-shaped structure. A first clip 93 and a second clip 94 are arranged at intervals on the hanging plate 91. The first clip 93 and the second clip 94 are both square structures and are integrally formed with the hanging plate 91, making the structure sturdy. The upper edge of the first clip 93 is connected to the hanging plate 91, and the side edge of the second clip 94 is connected to the hanging plate 91. The first clip 93 is located on the side of the chamber door 2 of the test chamber.

[0070] The installation process of support bar 9 is as follows: First, insert the second clip 94 into the hanging hole 81 of the inner wall hanging bar 8. The upper and lower side walls of the second clip 94 are tightly fitted with the upper and lower side edges of the hanging hole 81, restricting the upper and lower movement of the second clip 94. Then, insert the first clip 93 into the hanging hole 81 of the outer wall hanging bar 8. The left and right sides of the first clip 93 are tightly fitted with the left and right sides of the hanging hole 81, restricting the left and right movement of the first clip 93, thereby achieving a stable connection between support bar 9 and wall hanging bar 8. According to the sample size, select different heights of hanging holes 81 to install support bar 9, thereby adjusting the height of basket frame 10 to adapt to the testing needs of samples of different specifications.

[0071] In use, the test sample is placed on the basket frame 10, and the basket frame 10 can be pushed into the housing 1 along the support bar 9. When pulled out, the basket frame 10 can still be stably supported on the support bar 9. When the basket frame 10 is pulled out, the center of gravity shifts outward, and the basket frame's alignment F points downward. Therefore, the other end of the support bar 9 will tilt upward along A. However, due to the horizontal locking structure of the second locking piece 94, the support bar 9 will not tilt upward around the first locking piece 93, thus preventing the test sample from falling.

[0072] The working principle of this invention is as follows: Figures 1-23As shown, before the test, adjust the height of the support bar 9 according to the sample size, place the sample on the basket frame 10, close the box door 2, turn the handle 43 to drive the latch 42 to rotate, so that the locking pin 53 enters the locking area, release the handle 43, and lock under the action of the torsion spring. At the same time, the first limit pin 64, under the pushing force of the first spring 65, passes through the first support hole 68, the first limit hole 612 and the second support hole 69, and locks the connecting plate 63, completing the sealing and locking of the box door 2; start the test equipment and test the sample; when a large pressure is generated instantaneously in the box 1 during the test, the pressure first pushes the sealing cover 74 to move upward, squeezing the steel ball 712 into the mounting hole 711. The sealing cover 74 continues to move upward, and the steel ball 712 resets to position the sealing cover 74. The explosion relief component 7 opens to achieve initial pressure relief; if the pressure continues to rise, it pushes the box door 2 to open outward, and the box... Door 2 moves the first lock assembly 4, which in turn moves the second mounting base 51 outward via the lock pin 53. The blade 56 on the inner wall of the fixing hole 54 cuts the shearing screw 55, causing it to break. The second mounting base 51 separates from the box body 1. At the same time, the connecting plate 63 moves along the guide groove 67. When it reaches its maximum stroke, the first limit pin 64 inserts into the first limit hole 612 and the second support hole 69 of the connecting plate 63 to limit the connecting plate 63 from moving further, thereby limiting the maximum opening angle of the box door 2, achieving complete pressure relief, and avoiding equipment damage and personal injury. After the test, the first guide part 613 is pulled up, driving the first limit pin 64 to disengage from the first limit hole 612 and the second support hole 69. The handle 43 is turned, driving the latch 42 to rotate, causing the first lock assembly 4 and the second lock assembly 5 to separate. The second lock assembly 5 is then re-fixed to the box door via the shearing screw.

[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications or equivalent substitutions made to the present invention without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present invention.

Claims

1. An explosion-proof test chamber comprising a chamber body and a chamber door, one side of which is hinged to the chamber body by a hinge, characterised in that, It also includes a first lock assembly and a second lock assembly. The first lock assembly is disposed on the door, and the second lock assembly is disposed on the body. The first lock assembly and the second lock assembly are engaged to complete the locking. The first lock assembly includes a first mounting base, a latch, and a handle. A locking groove protrudes from one side of the first mounting base. The latch is rotatably mounted in the first mounting base by a torsion spring. The handle is connected to the latch, and the latch is driven to rotate by the handle. A hook-shaped portion is provided at the end of the latch, and the locking groove and the hook-shaped portion form a closed locking area. The second lock assembly includes a second mounting base and a lock cover. The second mounting base is provided with a lock pin and at least two fixing holes. A shear screw is installed in the fixing holes, and a cutting edge is provided on the inner wall of the fixing holes, which acts on the shear screw. The lock cover is fitted onto the second mounting base and is securely connected to the second mounting base. An opening is provided on one side of the lock cover to allow the lock groove and the latch to pass through. After the first lock assembly and the second lock assembly are locked, the lock pin is located in the locking area; when a large pressure is generated instantaneously inside the explosion-proof test chamber, it will push the chamber door to open outward and drive the blade to cut the shear screw, so that the shear screw breaks and the second mounting base separates from the chamber body; It also includes a connecting component that connects the second lock assembly and the housing, and uses the connecting component to limit and limit the maximum opening angle of the housing door; the top of the housing is provided with an opening, and an explosion relief component is installed at the opening to relieve pressure inside the housing; the explosion relief component opens before the second lock assembly.

2. The explosion-proof test chamber according to claim 1, characterized in that The connecting assembly includes a first connecting seat, a second connecting seat, a connecting plate, a first limiting pin, a first spring, and a guide cover. The first connecting seat is fixed on the second lock assembly, and the second connecting seat is disposed on the housing. One end of the connecting plate is hinged to the first connecting seat. The second connecting seat is provided with a through guide groove that allows the connecting plate to pass through. The two sides of the guide groove are provided with a first support hole and a second support hole. One end of the first limiting pin has a tapered structure, and the other end extends radially to form a limiting edge; the guide cover is axially recessed to accommodate the first spring, the guide cover is disposed on the second connecting seat, the first spring is disposed in the cavity and acts on the limiting edge, and the first spring provides axial thrust to the first limiting pin; The first limiting pin is placed inside the first support hole; the connecting plate is correspondingly provided with a first limiting hole; when locked, the first limiting pin connects the first support hole, the first limiting hole and the second support hole.

3. A test chamber according to claim 2, wherein The first limiting pin has a first guide portion extending axially from one end of the limiting edge. The guide cover has a first guide hole that mates with the first guide portion. The first guide portion is slidably connected to the first guide hole. The first spring is sleeved on the first guide portion, and the first guide portion guides the first spring to compress and unfold. When the first limiting pin is in the locked position, the first guide portion protrudes from the guide cover, so that the first limiting pin can be driven to move axially by lifting the first guide portion.

4. The explosion-proof test chamber of claim 2, wherein The first connecting seat has a first connecting part and a second connecting part protruding on both sides. The first connecting part and the second connecting part are respectively provided with a first connecting hole and a second connecting hole. The first connecting hole is a screw hole and the second connecting hole is a smooth hole. The connecting plate is provided with a third connecting hole, which is also a smooth hole. The connecting plate is hinged to the first connecting seat through a hinge rod. The hinge rod includes a gripping part, a fixing part, and a hinge part that are continuously arranged axially. The fixing part is threadedly engaged with the first connecting hole. The hinge part is a smooth rod. In use, the gripping part is driven to rotate the fixing part, so that the hinge rod is fixed to the first mounting base. The end of the hinge part is placed in the second connecting hole. The connecting plate is rotatably connected to the hinge part through the third connecting hole.

5. The explosion-proof test chamber of claim 2, wherein The tail end of the connecting plate is provided with a fourth connecting hole, and a second limiting pin is provided in the fourth connecting hole, the second limiting pin being tightly fitted with the fourth connecting hole.

6. The explosion-proof test chamber according to claim 1, characterized in that, The explosion venting assembly includes an inner explosion venting cover, an outer explosion venting cover, guide rods, and a sealing cover. At least four guide rods are provided, positioned circumferentially around the opening. The sealing cover is slidably connected to the guide rods. The outer explosion venting cover is positioned outside the opening, and the inner explosion venting cover is positioned inside the opening. Both the inner and outer explosion venting covers have several vent holes. The sealing cover has a stepped structure circumferentially, and a sealing strip is provided around the contact surface between the sealing cover and the upper surface of the opening.

7. An explosion-proof test chamber according to claim 6, characterized in that The guide rod includes a continuously arranged driving part, a second guide part, and a threaded part. The threaded part is threadedly connected to the housing. The second guide part is a smooth rod with a mounting hole. The mounting hole is obliquely arranged. A steel ball and a second spring are arranged in the mounting hole. The steel ball and the second spring are arranged in the mounting hole, and a plug is provided at the tail of the mounting hole. The second spring acts on the steel ball, causing the steel ball to protrude from the front end of the mounting hole. When the sealing cap moves upward, it pushes the steel ball to move obliquely upward along the mounting hole to hide inside the mounting hole; as the sealing cap continues to move upward, the steel ball is reset under the action of the second spring to prevent the sealing cap from falling back.

8. The explosion-proof test chamber of claim 1, wherein, The box is equipped with wall-mounting strips, support strips and a basket frame. The wall-mounting strips are arranged on opposite sides of the box, with two wall-mounting strips spaced apart on each side. The support strips are snapped onto the wall-mounting strips, and the two sides of the basket frame are placed on the support strips. The wall-mounting strip has several vertically arranged hanging holes, and there is a gap between the hanging holes and the inner wall of the box in the circumferential direction; the hanging holes are square holes. The support bar includes a mounting plate and a first support plate. The first support plate is horizontally arranged and fixed to the mounting plate. A first clip and a second clip are spaced apart on the mounting plate. The upper edge of the first clip is connected to the mounting plate, and the side edge of the second clip is connected to the mounting plate. The first clip is located near the door of the test chamber. In use, the second clip is inserted into the hanging hole of the inner wall-mounted strip, and the upper and lower side walls of the second clip cooperate with the upper and lower side edges of the hanging hole to restrict the upper and lower movement of the second clip; then the first clip is inserted into the hanging hole of the outer wall-mounted strip, and the left and right sides of the first clip cooperate with the left and right side edges of the hanging hole to restrict the left and right movement of the first clip.

9. The explosion-proof test chamber according to claim 8, characterized in that, The first card and the second card have a square structure; the first card, the second card and the mounting plate are an integral structure.

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