A vacuum extraction and sealing device based on pipeline

Abstract

The utility model discloses a vacuum extraction sealing device based on a pipeline, comprising a sealing cup with a circular cross-section, the sealing cup comprising a sealing ring and an air pumping part, the air pumping part and the sealing ring are integrally fixedly connected; an air pumping hole is opened in the middle of the air pumping part, the air pumping hole is sealingly connected to an air pumping pipe with a valve, the air pumping hole is communicated with the sealing ring, and a detection hole is opened along the radial direction of the air pumping part for sealingly connecting a pressure gauge; a sealing ring is rotatably connected to the inner wall of the middle part of the sealing ring; the sealing ring moves to the outer wall of the corrugated tube with a membrane, the sealing ring is used to seal the membrane and the bellows, and through the channel of the corrugated groove, the gas between the corrugated groove and the membrane is extracted into the sealing ring or flows to the outside through the air pumping hole under the action of external suction.

Description

Technical Field

[0001] The utility model relates to the field of bellows, in particular to a vacuum extraction and sealing device based on a pipeline. Background Art

[0002] Bellows lamination is to fit a layer of film tightly to the surface of the bellows. This can enhance the performance of the bellows, provide additional protection, or improve its appearance and texture. During the lamination process, both the bellows and the film need to be cleaned and processed to ensure that their surfaces are clean, free of oil and impurities, and that there is no air between the bellows and the film to maintain a vacuum state.

[0003] Since there are annular corrugated grooves on the outer wall surface between the two ends of the bellows and the end portions are smooth outer walls, it is difficult to extract the gas between the bellows and the membrane. Due to the presence of the corrugated grooves, a portion of the gas will exist in the corrugated grooves, making it difficult for the prior art to completely clear the air, which has a great impact on the subsequent heating and softening process of the membrane, resulting in bubbles or wrinkles between the membrane and the bellows, affecting product quality. For this reason, the utility model provides a vacuum extraction and sealing device based on a pipeline. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum extraction and sealing device based on a pipeline to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pipeline-based vacuum extraction sealing device comprises a sealing cup with a circular cross section, the sealing cup comprises a sealing ring and a pumping part, the pumping part and the sealing ring are integrally fixedly connected; a pumping hole is provided in the middle of the pumping part, the pumping hole is sealedly connected to a pumping pipe with a valve, the pumping hole is communicated with the sealing ring, a detection hole is provided along the radial direction of the pumping part, and is used for sealingly connecting a pressure gauge; a sealing ring is rotatably connected to the inner wall of the middle of the sealing ring;

[0007] The sealing ring moves to the outer wall of the bellows with the membrane on it, and uses the sealing ring to seal the membrane and the bellows. Through the channel of the bellows groove, the gas between the bellows groove and the membrane is drawn into the sealing ring or flows to the outside through the suction hole under the action of external suction.

[0008] Preferably, a ring groove is formed on a side of the sealing ring away from the air pumping portion, and a retaining portion is inserted into the ring groove.

[0009] Preferably, the retaining portion comprises a retaining ring and a retaining block which are fixedly connected, and the retaining block is used to be inserted into the annular groove.

[0010] Preferably, the inner diameter of the retention ring is the same as the inner diameter of the sealing ring, and the maximum outer diameter of the retention ring is less than or equal to the inner wall diameter of the sealing ring.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model has a simple structure, convenient operation and good air extraction effect; the membrane and the bellows can be sealed by the cooperation of the sealing ring and the sealing ring to prevent external gas from entering the sealing cup and affecting the extraction of gas, and at the same time, the gas between the bellows and the membrane can be extracted by using the bellows groove;

[0013] After the gas extraction is completed, the retention ring will not move with the withdrawal of the sealing cup. It can be manually slid so that the retention ring is placed at the end without the corrugated groove to prevent external gas from entering between the bellows and the membrane again, so that the vacuum state can be maintained for a long time, ensuring that when the membrane is heated and softened, the membrane and the outer wall of the bellows fit evenly to avoid quality problems such as bubbles and wrinkles; the performance of the bellows after coating is maximized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 It is a schematic diagram of the internal structure of the sealing ring of the utility model.

[0018] In the figure: 1 sealing cup, 11 sealing ring, 12 exhaust part, 21 exhaust hole, 22 detection hole, 23 exhaust pipe, 3 sealing ring, 4 retention part, 41 retention ring, 42 retention block, DETAILED DESCRIPTION

[0019] Embodiment 1:

[0020] See also Figure 1-4The utility model provides a technical solution: a vacuum extraction sealing device based on a pipeline, comprising a sealing cup 1 with a circular cross-section, the sealing cup 1 comprising a sealing ring 11 and a suction part 12, the suction part 12 and the sealing ring 11 are integrally fixedly connected; a suction hole 21 is provided in the middle of the suction part 12, the suction hole 21 is sealed and connected to a suction pipe 23 with a valve, the suction hole 21 is communicated with the sealing ring 11, and a detection hole 22 is provided along the radial direction of the suction part 12 for sealing and connecting a pressure gauge; a sealing ring 3 is rotatably connected to the inner wall of the middle part of the sealing ring 11 for sealing the bellows with a membrane; the sealing ring 3 is preferably made of metal; the sealing cup 1 is preferably made of organic glass;

[0021] The sealing ring 3 is provided with an annular groove on one side away from the air extraction part 12, into which a retaining part 4 is inserted. The retaining part 4 includes a retaining ring 41 and a retaining block 42 which are fixedly connected. The retaining block 42 is used to be inserted into the annular groove. The inner diameter of the retaining ring 41 is the same as the inner diameter of the sealing ring 3 (see FIG. Figure 3 The maximum diameter of the outer circumference of the retaining ring 41 is less than or equal to the inner wall diameter of the sealing ring 11, so that the retaining portion 4 can slide axially inside the sealing ring 11.

[0022] Working principle: prepare two sets of sealing cups 1. For one of the sealing cups 1, the operator first places the retention part 4 into the sealing ring 11, and the retention block 42 faces the sealing ring 3, so that the retention part 42 slides close to the sealing ring 3 until the retention block 42 is inserted into the ring groove; close the valve of the exhaust pipe 23, seal the detection hole 22, and then slide the sealing cup 1 from one end of the bellows with the membrane to the outer wall with the corrugated groove, and use the sealing ring 3 and the retention ring 41 to squeeze the membrane;

[0023] Similarly, pick up another sealing cup 1, insert the retention part 4, connect the pressure gauge to the air extraction hole 22, close the valve and slide from the other end of the bellows to the outer wall of the bellows with the corrugated groove, then connect the air extraction pipe 23 to the external air extraction pipeline, open the valve to extract air, and extract the gas between the bellows and the membrane through the corrugated groove, observe the pressure gauge until the bellows and the membrane are kept in a vacuum state, then close the valve and disconnect from the air extraction pipeline; move one of the sealing cups 1 out of one end of the bellows, at this time, due to the friction between the retention ring 42 and the membrane on the outer periphery of the bellows, it will not move with the sealing cup 1, and then slide the retention ring 42 to the end of the bellows, so that the retention ring 42 is placed on the outer wall of the end of the bellows without the corrugated groove, to prevent external gas from entering between the bellows and the membrane again;

[0024] The same is true for the retaining ring 42 in the other sealing cup 1. After the two sealing cups 1 are moved and pulled out, the retaining ring 42 always maintains a sealed state on the end of the bellows to avoid problems such as bubbles or wrinkles between the bellows and the membrane when the membrane is subsequently heated.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline-based vacuum extraction and sealing device, characterized in that: The sealing cup (1) comprises a sealing ring (11) with a circular cross section, the sealing cup (1) comprising a sealing ring (11) and an air extraction portion (12), the air extraction portion (12) and the sealing ring (11) being integrally fixedly connected; an air extraction hole (21) is provided in the middle of the air extraction portion (12), the air extraction hole (21) is sealingly connected to an air extraction pipe (23) with a valve, the air extraction hole (21) is communicated with the sealing ring (11), and a detection hole (22) is provided along the radial direction of the air extraction portion (12) for sealingly connecting to a pressure gauge; a sealing ring (3) is rotatably connected to the inner wall of the middle of the sealing ring (11); The sealing ring (11) moves to the outer wall of the bellows on which the membrane is sleeved, and the sealing ring (3) is used to seal the membrane and the bellows. Through the channel of the bellows groove, the gas between the bellows groove and the membrane is drawn into the sealing ring (11) or flows to the outside through the air extraction hole (21) under the action of external suction.

2. A pipeline-based vacuum extraction and sealing device according to claim 1, characterized in that: A ring groove is formed on a side of the sealing ring (3) away from the air extraction portion (12), and a retaining portion (4) is inserted into the ring groove.

3. A pipeline-based vacuum extraction and sealing device according to claim 2, characterized in that: The retention portion (4) comprises a retention ring (41) and a retention block (42) which are fixedly connected, and the retention block (42) is used to be inserted into the ring groove.

4. A pipeline-based vacuum extraction and sealing device according to claim 3, characterized in that: The inner diameter of the retention ring (41) is the same as the inner diameter of the sealing ring (3), and the maximum outer diameter of the retention ring (41) is less than or equal to the inner wall diameter of the sealing ring (11).

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