A high-precision double-layer explosion-proof container

Abstract

The present invention aims at the drawback that the poor installation accuracy of explosion-proof containers in the prior art leads to poor concentricity, and provides a high-precision double-layer explosion-proof container, which belongs to the technical field of double-layer explosion-proof containers, and includes an outer tube, a connecting ring, an inner tube, and an explosion-proof cover. The connecting ring is fixedly arranged at the opening position of the outer tube, the inner tube is sleeved in the outer tube, and a clamping ring is sleeved on the outer side of the inner tube opening. The explosion-proof cover includes a cover plate and a cover body. The lower end surface of the cover plate is fixedly provided with a limit ring sleeved outside the connecting ring, and a screw hole is opened in the middle position of the cover plate. The cover body includes a coaxially arranged connecting column and a skirt, the connecting column is screwed with the screw hole, the skirt extends into the connecting ring, and the skirt and the connecting ring are threaded or clamped. The lower end of the skirt extends into the opening of the inner tube. The present invention has high concentricity between the various components, high installation accuracy, stable installation of the inner tube, and a small gap between the inner tube and the skirt, which can effectively improve the explosion-proof performance.

Description

Technical Field

[0001] The invention belongs to the technical field of double-layer explosion-proof containers, and in particular relates to a high-precision double-layer explosion-proof container. Background Art

[0002] Double-layer explosion-proof containers or multi-layer explosion-proof containers generally have three main components: explosion-proof cover, outer cylinder and inner cylinder. Due to its complex structure, the cover plate, cover body, buffer block and cylinder body and connecting ring on the outer cylinder that make up the explosion-proof cover are generally processed separately. After the separate processing is completed, the cover plate, cover body, cylinder body and connecting ring are fixed by welding. This processing method is relatively simple, but due to electric welding deformation, gap between the inner cylinder and the outer cylinder, easy shaking during installation and other reasons, the concentricity between the various components is poor, the cover body is easy to get stuck during opening and closing operations, and it is inconvenient to use. In addition, in order to avoid the occurrence of such problems, the various dimensional margins of the closed contact surface are usually enlarged, resulting in a larger gap when the cover body and the cylinder body are closed, which will cause the explosion-proof performance of the explosion-proof container to decrease. Summary of the invention

[0003] In order to solve the problem that poor installation accuracy leads to poor concentricity of explosion-proof containers in the prior art, the present invention provides a high-precision double-layer explosion-proof container, which has high installation accuracy and good concentricity, thereby improving the overall explosion-proof performance. The installation and disassembly between the explosion-proof cover and the connecting ring are also very smooth, and the inner cylinder is also relatively stable.

[0004] The invention objective of the present invention is achieved through the following technical solutions: a high-precision double-layer explosion-proof container, comprising an outer tube, a connecting collar, an inner tube, and an explosion-proof cover, wherein the connecting collar is a circular ring structure, the connecting collar is fixedly arranged at the opening position of the outer tube, the inner tube is sleeved in the outer tube, a clamping ring sleeved on the outer side of the inner tube opening is arranged between the outer side of the opening of the inner tube and the connecting collar, and the outer wall of the clamping ring is connected to the inner wall of the connecting collar; the explosion-proof cover comprises a cover plate and a cover body, a limit ring sleeved outside the connecting collar is fixedly arranged on the lower end surface of the cover plate, a screw hole coaxially arranged with the limit ring is opened in the middle position of the cover plate, the cover body comprises a coaxially arranged connecting column and a skirt, the connecting column is fixedly arranged on the upper end surface of the skirt, and the connecting column and the skirt are an integrated structure, the skirt protrudes relative to the side of the connecting column, the connecting column extends into the screw hole and is screwed with the screw hole, the side of the skirt facing the connecting column is fitted with the lower end surface of the cover plate, the skirt extends into the connecting collar, and the skirt and the connecting collar are threaded or clamped. In the above scheme, the explosion-proof cover is divided into a cover plate and a cover body, which can be processed separately. Separate processing can reduce the processing difficulty. The cover body includes a coaxially arranged connecting column and a skirt, so the cover plate and the cover body can be processed by a lathe, thereby ensuring the concentricity of the connecting column and the skirt on the cover body, and further ensuring the concentricity between the cover plate and the cover body. The connecting collar is also processed by a lathe, which can also ensure the concentricity between the connecting collar and the explosion-proof cover. Insert the inner cylinder into the space between the collar and the skirt, and the inner cylinder should be able to rotate easily when it is turned. Then put on the outer cylinder, and fix the connecting collar and the outer cylinder, and the outer cylinder and the inner cylinder respectively. In this way, the concentricity of the explosion-proof cover, the connecting collar, and the inner cylinder is ensured, the installation accuracy is improved, and the gap between the components is reduced, thereby making the installation and removal of the explosion-proof cover very smooth while improving the explosion-proof performance of the container. When the explosive items in the explosion-proof container explode, the limit ring set on the cover plate can limit the connecting collar to prevent the upper end of the connecting collar from cracking outward, thereby improving the explosion-proof performance. The provided clamping ring can not only securely fit the outer side of the opening of the inner tube to prevent the opening end of the inner tube from being torn due to explosion and improve the explosion-proof performance, but also limit the inner tube to prevent the inner tube from shaking in the outer tube. The clamping ring can be directly fixed on the connecting ring, or it can be designed to be separated from the connecting ring and sleeved in the connecting ring. The lower end of the skirt extends into the opening of the inner tube, and the outer wall of the skirt fits the inner wall of the inner tube. Because the concentricity of the above-mentioned components is relatively high, it can be arranged in this way. The skirt arranged in this way cooperates with the clamping ring to better limit the inner tube to prevent the inner tube from shaking in the outer tube. At the same time, it can also reduce the gap between the skirt and the inner tube, thereby improving the explosion-proof performance of the explosion-proof container.

[0005] Preferably, the clamping ring is fixedly arranged on the inner side of the connecting collar and is coaxially arranged with the connecting collar.

[0006] Preferably, the collar is composed of a plurality of arc blocks distributed in a circumferential array around the center line of the connecting collar, the inner diameter of the arc block is equal to the outer diameter of the inner cylinder, and the arc block and the connecting collar are an integral structure. The arc block arranged in this way can be processed together with the connecting collar by a lathe first, and then processed together by a wire cutting machine. The arc block and the connecting collar of the integral structure have better concentricity, which is conducive to improving the installation accuracy, and the structure is more solid.

[0007] Preferably, the skirt and the connecting collar are connected by a clamping connection, and the outer side of the skirt is fixed with eight clamping blocks distributed in a circumferential array around the center line of the skirt, and a gap is left between the clamping blocks and the lower end surface of the cover plate, and the upper end of the inner wall of the connecting collar is fixed with eight clamping teeth distributed in a circumferential array around the center line of the connecting collar, and the thickness of the clamping teeth is not greater than the distance between the clamping blocks and the cover plate. In this way, there are a large number of clamping blocks and clamping teeth, so that the explosion-proof cover only needs to be rotated at a small angle to open and close the explosion-proof cover, which is easier to operate the explosion-proof cover.

[0008] Preferably, there are eight arc blocks, and the eight arc blocks correspond to the eight latch teeth one by one, and the arc blocks are located directly below the corresponding latch teeth, and the length of the arc blocks is equal to the length of the latch teeth. When machining the connecting collar with a lathe, two coaxial circular rings can be lathe-machined on the inner side of the connecting collar, and then the latch teeth and the arc blocks can be machined together with a wire cutting machine, which is more convenient.

[0009] Preferably, the skirt and the connecting ring are threadedly connected.

[0010] Preferably, the connecting ring is welded to the outer cylinder.

[0011] Preferably, a handle is fixedly provided on the upper end of the connecting column.

[0012] Preferably, an annular groove is provided on the upper end of the connecting ring and the lower end surface of the cover plate, and a sealing ring is provided between the two annular grooves.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the concentricity between the various components of the present invention is higher, the installation accuracy is higher, the inner cylinder is firmly installed, the gap between the inner cylinder and the skirt is smaller, and the explosion-proof performance can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 is a schematic diagram of the cross-sectional structure of the cover plate;

[0016] Figure 3 It is a three-dimensional diagram of the cover;

[0017] Figure 4A three-dimensional diagram of the connecting ring;

[0018] Markings in the figure: 1. outer cylinder, 2. connecting ring, 3. inner cylinder, 4. arc block, 5. cover plate, 6. limit ring, 7. screw hole, 8. connecting column, 9. skirt, 10. block, 11. tooth, 14. handle, 16. circular ring groove, 17. sealing ring. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0020] Example 1

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a high-precision double-layer explosion-proof container includes an outer tube 1, a connecting collar 2, an inner tube 3, and an explosion-proof cover. The connecting collar 2 is a circular ring structure. The connecting collar 2 is welded and fixedly arranged at the opening position of the outer tube 1. The inner tube 3 is sleeved in the outer tube 1. A clamping ring sleeved on the outer side of the opening of the inner tube 3 is provided between the outer side of the opening of the inner tube 3 and the connecting collar 2. The clamping ring is fixedly arranged on the inner side of the connecting collar 2 and is coaxially arranged with the connecting collar 2. The clamping ring is composed of eight arc blocks 4 distributed in a circular array around the center line of the connecting collar 2. The inner diameter of the arc block 4 is equal to the outer diameter of the inner tube 3. The arc block 4 and the connecting collar 2 are an integral structure. The explosion-proof cover includes a cover plate 5 and a cover body. The lower end surface of the cover plate 5 is fixedly provided with a limit ring 6 sleeved outside the connecting collar 2. The middle position of the cover plate 5 is provided with a screw hole 7 coaxially arranged with the limit ring 6. The cover body includes a coaxially arranged connecting column 8 and a skirt 9. The connecting column 8 is fixedly arranged on the upper end surface of the skirt 9 and the connecting column 8 and the skirt 9 are an integrated structure. The skirt 9 protrudes relative to the side of the connecting column 8. The connecting column 8 extends into the screw hole 7 and is screwed with the screw hole 7. The side of the skirt 9 facing the connecting column 8 is in contact with the lower end surface of the cover plate 5, and the skirt 9 extends into the connecting collar 2. The lower end of the skirt 9 extends into the opening of the inner tube 3, and the outer wall of the skirt 9 is in contact with the inner wall of the inner tube 3.

[0022] The skirt 9 is snap-fitted to the connecting collar 2. Eight blocks 10 are fixedly arranged on the outer side of the skirt 9 and are arranged in a circular array around the center line of the skirt 9. A gap is left between the blocks 10 and the lower end surface of the cover plate 5. Eight teeth 11 are fixedly arranged on the upper end of the inner wall of the connecting collar 2 and are arranged in a circular array around the center line of the connecting collar 2. The thickness of the teeth 11 is not greater than the distance between the blocks 10 and the cover plate 5. The eight arc blocks 4 correspond to the eight teeth 11 one by one, and the arc blocks 4 are located directly below the corresponding teeth 11. The length of the arc blocks 4 is equal to the length of the teeth 11. Two handles 14 are fixedly arranged on the upper end of the connecting column 8.

[0023] In the present application, the outer cylinder 1, the connecting ring 2, the inner cylinder 3, the cover plate 5 on the explosion-proof cover, and the cover body are all separate structures and can be processed separately. The processed cover plate 5 and the cover body are screwed and assembled to form an explosion-proof cover. Then, the inner cylinder 3 is inserted into the outer cylinder 1, and the connecting ring 2 is welded to the outer cylinder 1. Finally, the explosion-proof cover is installed on the connecting ring 2. This arrangement has good concentricity, can effectively improve the installation accuracy, and reduce the gap between the skirt 9 on the explosion-proof cover and the inner cylinder 3, thereby greatly improving the explosion-proof performance. At the same time, the inner cylinder 3 can also be limited and fixed to prevent the inner cylinder 3 from shaking in the outer cylinder 1.

[0024] The upper end of the connecting collar 2 and the lower end surface of the cover plate 5 are both provided with an annular groove 16, and a sealing ring 17 is provided between the two annular grooves 16. The provision of the sealing ring 17 can improve the sealing performance between the connecting collar 2 and the cover plate 5.

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A high-precision double-layer explosion-proof container, comprising an outer cylinder (1), a connecting ring (2), an inner cylinder (3), and an explosion-proof cover, characterized in that: The connecting collar (2) is a circular ring structure, the connecting collar (2) is fixedly arranged at the opening position of the outer cylinder (1), the inner cylinder (3) is sleeved in the outer cylinder (1), a clamping ring sleeved on the outer side of the opening of the inner cylinder (3) is provided between the outer side of the opening of the inner cylinder (3) and the connecting collar (2), and the outer wall of the clamping ring is connected to the inner wall of the connecting collar (2); the explosion-proof cover comprises a cover plate (5) and a cover body, a limit ring (6) sleeved outside the connecting collar (2) is fixedly provided on the lower end surface of the cover plate (5), a screw hole (7) coaxially arranged with the limit ring (6) is opened in the middle position of the cover plate (5), and the cover body comprises a coaxially arranged connecting column (8) and a skirt (9), the connecting column (8) being fixedly arranged on the upper end surface of the skirt (9) and the connecting column (8) and the skirt (9) being an integrated structure, the skirt (9) protruding relative to the side surface of the connecting column (8), the connecting column (8) extending into the screw hole (7) and being screwed with the screw hole (7), the side surface of the skirt (9) facing the connecting column (8) being in contact with the lower end surface of the cover plate (5), the skirt (9) extending into the connecting sleeve (2) and the skirt (9) and the connecting sleeve (2) being threadedly connected or clamped; the lower end of the skirt (9) extending into the opening of the inner tube (3), the outer wall of the skirt (9) being in contact with the inner wall of the inner tube (3); The clamping ring is fixedly arranged on the inner side of the connecting collar (2) and is coaxially arranged with the connecting collar (2); The collar is composed of a plurality of arc blocks (4) distributed in a circular array around the center line of the connecting collar (2); the inner diameter of the arc block (4) is equal to the outer diameter of the inner cylinder (3); the arc block (4) and the connecting collar (2) are an integral structure; The skirt (9) and the connecting collar (2) are connected by a clamping connection. Eight clamping blocks (10) are fixedly provided on the outer side surface of the skirt (9) and are distributed in a circular array around the center line of the skirt (9). A gap is left between the clamping block (10) and the lower end surface of the cover plate (5). Eight clamping teeth (11) are fixedly provided on the upper end of the inner wall of the connecting collar (2) and are distributed in a circular array around the center line of the connecting collar (2). The thickness of the clamping teeth (11) is not greater than the distance between the clamping block (10) and the cover plate (5); The upper end of the connecting collar (2) and the lower end surface of the cover plate (5) are both provided with an annular groove (16), and a sealing ring (17) is provided between the two annular grooves (16).

2. A high-precision double-layer explosion-proof container according to claim 1, characterized in that: There are eight circular arc blocks (4), and the eight circular arc blocks (4) correspond to the eight latching teeth (11) one by one. The circular arc blocks (4) are located directly below the corresponding latching teeth (11), and the length of the circular arc blocks (4) is equal to the length of the latching teeth (11).

3. A high-precision double-layer explosion-proof container according to claim 2, characterized in that: The skirt (9) and the connecting collar (2) are threadedly connected.

4. A high-precision double-layer explosion-proof container according to any one of claims 1 to 3, characterized in that: The connecting sleeve (2) is welded on the outer cylinder (1).

5. A high-precision double-layer explosion-proof container according to any one of claims 1 to 3, characterized in that: A handle (14) is fixedly provided on the upper end of the connecting column (8).

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