Vacuum-pumping sealing device for gas cylinder

Abstract

The utility model relates to the technical field of gas storage and treatment, in particular to a gas cylinder vacuumizing sealing device which comprises a connecting sleeve, sealing cavities are symmetrically formed in the connecting sleeve, limiting rods are arranged in the sealing cavities, a hinge seat is arranged at one end of each limiting rod, a pressure spring is arranged at the top end of each limiting rod, and a sealing ring is arranged at the other end of each limiting rod. Threaded pipes are symmetrically arranged in the connecting sleeve, threaded rods are arranged in the threaded pipes, limiting gaskets are arranged at one ends of the threaded rods, the connecting sleeve is connected with a sealing piece, a fastening hoop is arranged outside the sealing piece, a conveying pipe is arranged at one end of the connecting sleeve and connected with a gas cylinder, and a connecting pipe is arranged at the other end of the connecting sleeve. The connecting pipe is connected with vacuumizing equipment, and by means of the structure of the threaded pipe, the screw rod, the limiting gasket, the sealing piece, the fastening hoop and the compressed spring, the problem that the vacuum degree time is shortened due to the fact that a sealing structure between a common vacuumizing device and the gas cylinder connecting piece is not tight is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas storage and processing, in particular to a gas cylinder vacuum sealing device. Background Art

[0002] In industrial production and laboratory environments, gas cylinders are commonly used gas storage equipment. In order to ensure the purity and safety of the gas inside the gas cylinder, the gas cylinder needs to be vacuumed regularly to remove impurities and air inside the cylinder. Generally, the gas cylinder uses a vacuum air pump to extract air to form a vacuum state, but the connection between the vacuum air pump pipeline and the cryogenic gas cylinder is inconvenient, and the sealing structure at both ends of the connector is not strong, so the vacuum retention time will be shortened and the vacuum loss will increase.

[0003] The sealing structure between the general vacuum device and the gas cylinder connector is not tight, resulting in a shortened vacuum time.

[0004] Therefore, it is particularly important to design a gas cylinder vacuum sealing device to change the above technical defects and improve overall practicality. Utility Model Content

[0005] The utility model aims to provide a gas cylinder vacuum sealing device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A gas cylinder vacuum sealing device comprises a connecting sleeve, a sealing cavity is symmetrically arranged inside the connecting sleeve, a limiting rod is arranged inside the sealing cavity, a hinge seat is arranged at one end of the limiting rod, a compression spring is arranged at the top of the limiting rod, threaded tubes are symmetrically arranged inside the connecting sleeve, a screw is arranged inside the threaded tube, a limiting gasket is arranged at one end of the screw, the connecting sleeve is connected to a sealing plate, a fastening hoop is arranged outside the sealing plate, a delivery pipe is arranged at one end of the connecting sleeve, the delivery pipe is connected to the gas cylinder, a connecting pipe is arranged at the other end of the connecting sleeve, and the connecting pipe is connected to a vacuum equipment.

[0008] As a preferred solution of the utility model, the limit rod and the hinge seat are rotatably connected, and the two ends of the compression spring are fixedly connected to the limit rod and the inner side wall of the sealing cavity respectively.

[0009] As a preferred solution of the utility model, the position of the limiting gasket is adjusted up and down inside the threaded tube by a screw rod, and the material of the limiting gasket is a rubber pad.

[0010] As a preferred solution of the utility model, the fastening hoop is provided with an opening, and threaded holes are provided at both ends of the fastening hoop, and the tightness is adjusted by a threaded rod.

[0011] As a preferred solution of the utility model, the sealing sheet setting layers are respectively silicone rubber and aluminum sealing gaskets, the silicone rubber is in direct contact with the delivery pipe and the connecting pipe, and the aluminum sealing gasket is in direct contact with the fastening hoop.

[0012] As a preferred solution of the utility model, the connecting sleeve is made of stainless steel, and the interior of the connecting sleeve is hollow to facilitate the passage of gas, and a rubber sealing pad is provided at one end of the limiting rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, a gas cylinder vacuum sealing device is provided, which utilizes the structure of a threaded tube, a screw rod, a limiting gasket, a sealing sheet, a fastening hoop and a compression spring, and is used to connect two pipelines through a connecting sleeve. Three layers of protection are provided inside the connecting sleeve, the first layer is a rotatable limiting rod plus a sealing cushion, the second layer is a screw rod plus a limiting gasket, and the third layer is a fastening hoop and a sealing sheet. At the same time, the connecting sleeve can be used with pipelines of different sizes, and has strong versatility, thereby solving the problem that the sealing structure between a general vacuum device and a gas cylinder connector is not tight, resulting in a shortened vacuum time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the entire utility model;

[0016] Figure 2 It is a schematic diagram of the connecting sleeve assembly of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the screw assembly of the utility model.

[0018] In the figure: 1. connecting sleeve; 101. sealing chamber; 102. limiting rod; 103. hinged seat; 104. compression spring; 2. threaded pipe; 201. screw rod; 202. limiting gasket; 3. sealing sheet; 301. fastening hoop; 4. delivery pipe; 401. gas cylinder; 402. connecting pipe; 403. vacuum equipment. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings below. Several embodiments of the utility model are given. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0024] A gas cylinder vacuum sealing device comprises a connecting sleeve 1, wherein a sealing cavity 101 is symmetrically arranged inside the connecting sleeve 1, a limiting rod 102 is arranged inside the sealing cavity 101, a hinge seat 103 is arranged at one end of the limiting rod 102, a compression spring 104 is arranged at the top of the limiting rod 102, a threaded tube 2 is symmetrically arranged inside the connecting sleeve 1, a screw 201 is arranged inside the threaded tube 2, a limiting gasket 202 is arranged at one end of the screw 201, the connecting sleeve 1 is connected to a sealing sheet 3, a fastening hoop 301 is arranged outside the sealing sheet 3, a delivery pipe 4 is arranged at one end of the connecting sleeve 1, the delivery pipe 4 is connected to a gas cylinder 401, and a connecting pipe 402 is arranged at the other end of the connecting sleeve 1, and the connecting pipe 402 is connected to a vacuum device 401. 3. Pass the fastening hoop 301 through the delivery pipe 4, and then the delivery pipe 4 passes through the sealing piece 3 and goes deep into the interior of the connecting sleeve 1 until it reaches a suitable position. Then adjust the position of the screw rod 201 inside the threaded tube 2 until the limiting gasket 202 contacts the delivery pipe 4 and limits the position of the delivery pipe 4. At this time, the rubber sealing cushion on the limiting rod 102 is in contact with the surface of the delivery pipe 4. At the same time, place the fastening hoop 301 on the outside of the sealing piece 3, and then tighten the fastening hoop 301 by twisting the threaded rod. At this time, the sealing piece 3 is close to the surface of the delivery pipe 4. Similarly, install the connecting sleeve 1 and the connecting pipe 402. At this time, the connection between the gas cylinder 401 and the vacuum device 403 is completed, and gas delivery can begin.

[0025] The limiting rod 102 and the hinge seat 103 are rotatably connected, and the two ends of the compression spring 104 are fixedly connected to the limiting rod 102 and the inner side wall of the sealing cavity 101 respectively, so as to contact and seal with the pipeline. The limiting gasket 202 is adjusted up and down inside the threaded pipe 2 by the screw 201. The limiting gasket 202 is made of rubber pads, which is convenient for limiting the position of the pipeline. An opening is provided on the fastening hoop 301, and threaded holes are provided at both ends of the fastening hoop 301. The tightness is adjusted by the threaded rod to tighten the sealing piece. The sealing piece 3 is provided with two layers, namely silicone rubber and aluminum sealing gaskets. The silicone rubber is in direct contact with the conveying pipe 4 and the connecting pipe 402, and the aluminum sealing gasket is in direct contact with the fastening hoop 301, so as to better seal the gap between the pipeline and the connecting sleeve. The connecting sleeve 1 is made of stainless steel, and the interior of the connecting sleeve 1 is hollow for gas to pass through. One end of the limiting rod 102 is provided with a rubber sealing cushion for gas delivery.

[0026] The working process of the utility model is as follows: when using the gas cylinder vacuum sealing device, firstly, the fastening hoop 301 is passed through the delivery pipe 4, and then the delivery pipe 4 passes through the sealing plate 3 and goes deep into the interior of the connecting sleeve 1 until it reaches a suitable position, and then the position of the screw rod 201 inside the threaded tube 2 is adjusted until the limiting gasket 202 contacts the delivery pipe 4 and limits the position of the delivery pipe 4, at which time the rubber sealing cushion on the limiting rod 102 is in contact with the surface of the delivery pipe 4, and at the same time, the fastening hoop 301 is placed on the outside of the sealing plate 3, and then the threaded rod is twisted to tighten the fastening hoop 301, at which time the sealing plate 3 is close to the surface of the delivery pipe 4, and similarly, the connecting sleeve 1 and the connecting pipe 402 are installed, and at this time, the connection between the gas cylinder 401 and the vacuum equipment 403 is completed, and gas delivery can begin.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas cylinder vacuum sealing device, comprising a connecting sleeve (1), characterized in that: A sealing cavity (101) is symmetrically arranged inside the connecting sleeve (1), a limiting rod (102) is arranged inside the sealing cavity (101), a hinge seat (103) is arranged at one end of the limiting rod (102), a compression spring (104) is arranged at the top end of the limiting rod (102), a threaded tube (2) is symmetrically arranged inside the connecting sleeve (1), a screw rod (201) is arranged inside the threaded tube (2), a limiting gasket (202) is arranged at one end of the screw rod (201), the connecting sleeve (1) is connected to a sealing sheet (3), a fastening hoop (301) is arranged outside the sealing sheet (3), a delivery pipe (4) is arranged at one end of the connecting sleeve (1), the delivery pipe (4) is connected to a gas cylinder (401), and a connecting pipe (402) is arranged at the other end of the connecting sleeve (1), the connecting pipe (402) is connected to a vacuum pump (403).

2. A gas cylinder vacuum sealing device according to claim 1, characterized in that: The limiting rod (102) and the hinge seat (103) are rotatably connected, and the two ends of the compression spring (104) are respectively fixedly connected to the limiting rod (102) and the inner side wall of the sealing cavity (101).

3. A gas cylinder vacuum sealing device according to claim 1, characterized in that: The position of the limiting gasket (202) is adjusted up and down inside the threaded tube (2) via a screw rod (201), and the material of the limiting gasket (202) is a rubber pad.

4. A gas cylinder vacuum sealing device according to claim 1, characterized in that: The fastening hoop (301) is provided with an opening, and threaded holes are provided at both ends of the fastening hoop (301), and the tightness is adjusted by means of a threaded rod.

5. A gas cylinder vacuum sealing device according to claim 1, characterized in that: The sealing sheet (3) is provided with two layers, namely a silicone rubber and an aluminum sealing gasket. The silicone rubber is in direct contact with the delivery pipe (4) and the connecting pipe (402), and the aluminum sealing gasket is in direct contact with the fastening hoop (301).

6. A gas cylinder vacuum sealing device according to claim 1, characterized in that: The connecting sleeve (1) is made of stainless steel, and the interior of the connecting sleeve (1) is hollow to facilitate the passage of gas, and a rubber sealing pad is provided at one end of the limiting rod (102).

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