Cabin-penetrating sealing device for vacuum experiment cabin

Abstract

The utility model relates to the technical field of special environment experiment equipment, in particular to a cabin-penetrating sealing device for a vacuum experiment cabin, which comprises a connecting rod, a sealing ring and a sealing ring, the connecting rod is of a hollow structure and comprises a connecting end and a threading end, and the threading end is arranged to be a cone inclined from outside to inside; the first clamping hoop is arranged at the connecting end; the sealing assembly comprises a conical wire clamping plug and a pressing plate, the wire clamping plug is made of an elastic material, a through hole is formed in the center of the pressing plate, an inclined face is arranged on the side, away from the wire clamping plug, of the pressing plate, and the sealing device further comprises a second clamping hoop which is arranged at the wire penetrating end and abuts against the inclined face of the pressing plate. The device can be rapidly installed and detached, is high in applicability, effectively improves the installation efficiency, reduces the production and operation cost, facilitates the maintenance of the stability of a vacuum experiment environment, improves the experiment efficiency, and guarantees the experiment accuracy.

Description

Technical Field

[0001] The utility model relates to a cabin penetration sealing device for a vacuum experiment cabin, belonging to the technical field of special environment experiment equipment. Background Art

[0002] In a ground-based aerospace environment simulation experiment cabin, different experimental equipment often needs to be set up inside the vacuum cabin according to different experimental requirements. The current technology is to open a hole in the side wall of the vacuum cabin, then pass the plug-in wires or signal transmission lines of the experimental equipment through the through-hole, and then seal the hole with sealant to maintain the sealing of the vacuum cabin. However, in actual use, it is found that the sealant is very easy to loosen or crack and fall off due to uneven sealing techniques of workers or due to experiments in a simulated vibration aerospace environment, resulting in vacuum leakage of the vacuum cabin, thereby affecting the accuracy of the experiment and reducing the efficiency of the experimental work; and when the experimental equipment needs to be replaced, the sealant needs to be peeled off again, and then the plug-in wires or signal transmission lines of the new equipment need to be replaced and the openings need to be sealed again. Such operation is not only time-consuming and labor-intensive, increasing work costs, but also often leaves old sealant during replacement, further increasing the risk of vacuum leakage. Therefore, it is of practical significance to study a new type of through-cabin sealing device for vacuum experimental cabins. Utility Model Content

[0003] The utility model aims to solve the deficiencies in the prior art and provides a through-cabin sealing device for a vacuum experiment cabin.

[0004] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: A cabin penetration sealing device for a vacuum experiment cabin, comprising: a connecting rod, the connecting rod is a hollow structure with both ends extending outward to form a clamping flange, comprising a connecting end and a threading end, the threading end is set to a cone inclined from the outside to the inside; a first clamp, the first clamp is arranged at the connecting end, for connecting the cabin interface with the connecting rod; a sealing assembly, comprising a conical wire clamp plug plugged in the threading end, and a pressure plate abutting the wire clamp plug, the wire clamp plug is made of an elastic material and has a threading channel penetrating the center thereof, a through hole is provided in the center of the pressure plate and an inclined surface is provided on the side away from the wire clamp plug, and also comprises a second clamp, the second clamp is arranged at the threading end and abuts the inclined surface of the pressure plate.

[0005] Furthermore, the threading end is provided with a first sealing ring, which is arranged between the pressure plate and the threading end clamping flange, and the connecting end is provided with a second sealing ring.

[0006] Furthermore, a snap ring is provided inside the second sealing ring, one side of the snap ring is embedded in the diameter expansion groove provided on the inner side of the connecting end, and the other side of the snap ring is used for positioning when connecting to the cabin interface.

[0007] Furthermore, a snap ring is provided inside the first sealing ring, one side of the snap ring is embedded in a first ring groove provided on the lower surface of the pressure plate, and the other side of the snap ring is embedded in a second ring groove provided on the upper surface of the clamping plug. A boss is provided on the lower surface of the pressure plate.

[0008] Furthermore, the wire clamp is made of rubber or silicone material.

[0009] Furthermore, the pressure plate, the wire clamp and the connecting rod are coaxially arranged.

[0010] Furthermore, the conical surface of the wire clamp plug and the axis of the wire clamp plug have a first angle α1, the conical surface of the threading end and the axis of the connecting rod have a second angle α2, and the first angle α1 is greater than the second angle α2.

[0011] Furthermore, the first angle α1 is in the range of 13°-17°, and the difference between the first angle α1 and the second angle α2 is in the range of 1°-2°.

[0012] Furthermore, the contact point between the second clamp and the pressure plate is configured as a rounded corner.

[0013] The beneficial effects of the utility model are:

[0014] (1) The sealing device has a simple structure, can be quickly installed and disassembled, and has strong applicability. It can be used for wiring operations with various types of wires. When different equipment needs to be replaced for wiring, there is no need to disassemble and replace other sealing devices that are compatible with the wires to be replaced, which effectively improves installation efficiency and reduces production and operation costs.

[0015] (2) The sealing device solves the problem that the threading holes fixed by punching sealant are prone to cracking and falling off, ensuring the sealing of the vacuum experiment chamber, which is conducive to maintaining the stability of the vacuum experiment environment, improving the experimental efficiency, ensuring the accuracy of the experiment, and playing a vibration-reducing role on the wires passing through the cabin, extending the service life of the wires passing through the cabin, ensuring the stability of signal transmission, and further ensuring the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the sealing device provided in an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of a sealing device provided in an embodiment of the present utility model;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the second sealing ring provided in an embodiment of the utility model;

[0019] Figure 4A cross-sectional view of a wire clamp provided by an embodiment of the present utility model;

[0020] Figure 5 A cross-sectional view of a pressure plate provided in an embodiment of the present utility model;

[0021] Figure 6 This is a cross-sectional view of a connecting rod provided in an embodiment of the present utility model.

[0022] Figure numerals: 1. connecting rod; 2. clamping flange; 3. connecting end; 4. threading end; 5. first clamp; 6. fastening bolt; 7. wire clamp; 8. pressure plate; 9. threading channel; 10. second clamp; 11. first sealing ring; 12. second sealing ring; 13. clamping ring; 14. diameter expansion groove; 15. first annular groove; 16. second annular groove; 17. boss. DETAILED DESCRIPTION

[0023] The following is a detailed description of the specific embodiments of the present invention. The present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used are only for describing specific embodiments and are not intended to limit the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] Example:

[0028] like Figure 1-2As shown, the utility model provides a cabin penetration sealing device for a vacuum experiment cabin, including a connecting rod 1, the connecting rod 1 is a hollow structure with both ends extending outward to form a clamping flange 2, including a connecting end 3 and a threading end 4, the threading end 4 is set to a cone inclined from the outside to the inside; a first clamp 5, the first clamp 5 is arranged at the connecting end 3, for connecting the cabin interface with the connecting rod 1; a sealing assembly, including a conical wire clamping plug 7 plugged in the threading end 4, and a pressure plate 8 abutting the wire clamping plug 7, the wire clamping plug 7 is made of an elastic material and has a threading channel 9 penetrating the center thereof, the pressure plate 8 is provided with a through hole in the center and an inclined surface is provided on the side away from the wire clamping plug 7, and also includes a second clamp 10, the second clamp 10 is arranged at the threading end 4 and abuts against the inclined surface of the pressure plate 8.

[0029] It should be pointed out that the connecting rod 1 is a one-piece structure formed by processing, or formed by welding. Considering the later sealing and maintenance-free requirements, it is preferably a one-piece structure formed by processing. The wire clamp 7 is made of rubber or silicone. The first clamp 5 and the second clamp 10 have the same structure, both of which include upper and lower parts hinged together and a fastening bolt 6. Because the clamp is common knowledge in the field, it will not be described here. By tightening the second clamp 10, pressure is applied to the pressure plate 8, and the pressure plate 8 pushes the wire clamp 7 toward the threading The end 4 moves internally, so that the outer wall of the wire clamping plug 7 is in close contact with the conical inner wall of the threading end 4, and because of the reaction force applied by the threading end 4, the wire clamping plug 7 is squeezed and deformed, and then the wires passing through the cabin are pressed, thereby achieving the installation and fixation of the wires passing through the cabin and the sealing of the vacuum experiment cabin. The wire clamping plug 7 can be applicable to various types of wires. Preferably, multiple groups of wire clamping plugs 7 with different inner diameters of threading channels 9 can be set. If the outer diameter of the wire passing through the cabin that needs to be replaced is too thick or too thin, it is only necessary to replace different wire clamping plugs 7 to achieve wire fixation and cabin sealing.

[0030] Through the above settings, it plays multiple roles. First, the sealing device has a simple structure, can be quickly installed and disassembled, and has strong applicability. It can be used for various types of wires for cabin connection operations. When different equipment needs to be replaced for cabin connection, there is no need to disassemble and replace other sealing devices that are compatible with the wires to be replaced, which effectively improves the installation efficiency and reduces production and operation costs; secondly, the device solves the problem of easy cracking and falling off of the wire holes fixed by punching sealant, ensures the sealing of the vacuum test cabin, is conducive to maintaining the stability of the vacuum test environment, improves experimental efficiency, ensures experimental accuracy, and has a vibration reduction effect on the cabin wires, extends the service life of the cabin wires, ensures stable signal transmission, and further ensures experimental accuracy.

[0031] Specifically, such as Figure 2As shown, the threading end 4 is provided with a first sealing ring 11, which is provided between the pressing plate 8 and the threading end 4 clamping flange 2, and the connecting end 3 is provided with a second sealing ring 12. The sealing performance can be further improved by providing the sealing ring.

[0032] Specifically, such as Figure 3 As shown, a snap ring 13 is disposed within the second sealing ring 12. One side of the snap ring 13 is embedded in an expanded groove 14 provided on the inner side of the connecting end 3, and the other side of the snap ring 13 is used for positioning during connection to the cabin interface. It should be noted that the snap ring 13 has an interference fit with the inner side of the expanded groove 14, and the bottom surface of the snap ring 13 abuts the bottom surface of the expanded groove 14. This arrangement provides a positioning function, facilitating quick connection to the cabin interface, and further improving the sealing performance between the cabin penetration sealing device and the cabin interface.

[0033] Specifically, such as Figure 2 、 4 As shown in Figure 5, a snap ring 13 is provided inside the first sealing ring 11. One side of the snap ring 13 is embedded in the first ring groove 15 opened on the lower surface of the pressure plate 8, and the other side of the snap ring 13 is embedded in the second ring groove 16 opened on the upper surface of the clamping plug 7. A boss 17 is provided on the lower surface of the pressure plate 8. It should be pointed out that the cross section of the first sealing ring 11 is square, the snap ring 13 is fixed at the upper position of the inner side of the first sealing ring 11, and the boss 17 is located in the annular area of ​​the first ring groove 15 and abuts against the clamping plug 7. Through the above arrangement, it plays a variety of roles. First, it further improves the sealing performance of the threading end 4. Secondly, it plays a limiting role, so that the clamping plug 7 is evenly stressed, reducing the influence of uneven stress on the service life of the clamping plug 7, avoiding the problem of pressure deviation that affects the seal and even damages the clamping plug 7. Finally, it can prevent the clamping plug 7 from being excessively pressed down, avoiding the problem of difficulty in pulling out the clamping plug 7 when replacing it.

[0034] Specifically, such as Figure 2 As shown, the pressure plate 8, the clamping plug 7 and the connecting rod 1 are coaxially arranged. The above arrangement ensures that the through-cabin wires are installed in the center, reduces the difficulty of threading, and further avoids the problem of wear and short circuit caused by the through-cabin wires contacting the inner wall of the sealing device under vibration conditions.

[0035] Specifically, such as Figure 4 and 6 As shown, the conical surface of the clamp plug 7 and the axis of the clamp plug 7 have a first angle α1, and the conical surface of the threading end 4 and the axis of the connecting rod 1 have a second angle α2, and the first angle α1 is greater than the second angle α2. It should be noted that Figure 4 The dotted line shown in the figure is the axis of the clamp plug 7. Figure 6 The dotted line shown in the figure is the axis of the connecting rod 1. Through the above arrangement, during use, it can be ensured that the threading end 4 stably supports the wire clamping plug 7, so that the wire clamping plug 7 is easy to deform, further ensuring the sealing performance.

[0036] Specifically, the range of the first angle α1 is 13°-17°, and the difference between the first angle α1 and the second angle α2 is 1°-2°. The definition of the above angle parameters is very critical. If the first angle α1 is less than 13°, under the premise that the size of the connecting rod 1 is determined, the size of the wire clamp 7 needs to be lengthened to be able to be used in conjunction with the connecting rod 1, which increases the production cost. If the first angle α1 is greater than 17°, then in the process of tightening the wire clamp 7, it is easy to cause local stress concentration of the wire clamp 7, shortening the service life of the wire clamp 7, and when the first angle α1 is greater than 17°, after fixing the cabin wires, the contact area between the cabin wires and the threading channel 9 is small, and vacuum leakage is likely to occur under a vibration environment, increasing the vacuum. The uncertainty of the air seal; and by limiting the range of the difference between the first angle α1 and the second angle α2, it is possible to coordinate the extremely small errors generated in the production process while ensuring the sealing, and at the same time solve the problem of local stress concentration on the side wall of the wire clamp 7. During use, the threading end 4 affects the stress distribution of the wire clamp 7. If the difference between the first angle α1 and the second angle α2 is greater than 2°, the compressive stress of the wire clamp 7 on the threading end 4 is too large and there is no buffer, which affects the service life of the wire clamp 7. Therefore, only by limiting the above angle parameters can the sealing and service life be further coordinated.

[0037] Specifically, the contact area between the second clamp 10 and the pressure plate 8 is configured as a rounded corner. It should be noted that the contact areas between the first clamp 5 and the second clamp 10 and the clamping flange 2 can both be configured as rounded corners. This configuration can avoid stress concentration at the contact area and hard damage during tightening of the clamps to achieve a secure connection, and can also prevent jamming during adjustment.

[0038] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all fall within the scope of protection of the utility model. The scope of protection of the utility model shall be based on the attached claims.

Claims

1. A penetration sealing device for a vacuum test chamber, characterized in that: include: A connecting rod, the connecting rod being a hollow structure with both ends extending outward to form a clamping flange, including a connecting end and a threading end, the threading end being configured as a conical shape inclined from the outside to the inside; a first clamp, which is provided at the connecting end and is used to connect the cabin interface and the connecting rod; The sealing assembly includes a conical wire clamping plug plugged in the threading end and a pressure plate abutting the wire clamping plug. The wire clamping plug is made of an elastic material and has a threading channel running through its center. A through hole is provided in the center of the pressure plate and a slope is provided on the side away from the wire clamping plug. The second clamp is also provided, and the second clamp is provided at the threading end and abuts against the slope of the pressure plate.

2. A penetration sealing device for a vacuum test chamber according to claim 1, characterized in that: The threading end is provided with a first sealing ring, which is arranged between the pressure plate and the threading end clamping flange, and the connecting end is provided with a second sealing ring.

3. The penetration sealing device for a vacuum test chamber according to claim 2, characterized in that: A snap ring is provided inside the second sealing ring, one side of the snap ring is embedded in the diameter-enlarging groove provided on the inner side of the connecting end, and the other side of the snap ring is used for positioning when connecting to the cabin interface.

4. The penetration sealing device for a vacuum test chamber according to claim 2, characterized in that: A snap ring is provided inside the first sealing ring, one side of the snap ring is embedded in the first ring groove opened on the lower surface of the pressure plate, and the other side of the snap ring is embedded in the second ring groove opened on the upper surface of the wire clamp. A boss is provided on the lower surface of the pressure plate.

5. A penetration sealing device for a vacuum test chamber according to any one of claims 1 to 4, characterized in that: The wire clamping plug is made of rubber or silicone material.

6. The penetration sealing device for a vacuum test chamber according to claim 5, characterized in that: The pressing plate, the wire clamping plug and the connecting rod are coaxially arranged.

7. The penetration sealing device for a vacuum test chamber according to claim 6, characterized in that: The conical surface of the wire clamp plug and the axis of the wire clamp plug have a first angle α1, and the conical surface of the threading end and the axis of the connecting rod have a second angle α2, and the first angle α1 is greater than the second angle α2.

8. The penetration sealing device for a vacuum test chamber according to claim 7, characterized in that: The first angle α1 is in the range of 13°-17°, and the difference between the first angle α1 and the second angle α2 is in the range of 1°-2°.

9. The penetration sealing device for a vacuum test chamber according to claim 1, characterized in that: The contact portion between the second clamp and the pressure plate is configured as a rounded corner.

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