Vacuum tube negative pressure suction device

Abstract

The utility model belongs to the technical field of solar energy, and relates to a vacuum tube negative pressure suction device which comprises a vacuum suction tube, a fixing sleeve and a sealing-off device, a connector, a venturi nozzle, a suction connector and an air outlet are arranged in the vacuum suction tube, the connector is connected with an external air source, the suction connector is arranged on the side wall of the venturi nozzle, and the outlet is connected with the air outlet. The fixed sleeve comprises a fixed ring, a connecting rod and a stabilizing cylinder, the fixed ring is arranged outside the suction pipe in a sleeving mode and connected with the stabilizing cylinder through the connecting rod, the sealing-off device comprises a telescopic rod, a sealing-off lantern ring and a fire spraying opening, the telescopic rod is connected with the sealing-off lantern ring, the fire spraying opening is formed in the inner wall of the lantern ring, the air outlet is provided with a silencer, the stabilizing cylinder is fixed through a rubber gasket, and an anti-falling sleeve is arranged below the sealing-off lantern ring. According to the vacuum suction pipe, air in the vacuum pipe is pumped out through the venturi effect, the effect that the interior of the vacuum pipe is vacuumized through suction is achieved, the air suction opening of the vacuum pipe is sealed through the sealing-off device while suction of the vacuum pipe is in negative-pressure vacuum, and gas leakage is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of solar energy technology, specifically relating to a vacuum tube negative pressure suction device. Background Technology

[0002] During the use of solar energy, the heat-absorbing coating of the inner tube absorbs sunlight and heats the water inside the inner tube. The water then exchanges heat with the water tank or connected tank to increase the water temperature. To improve the heating efficiency of solar energy, a vacuum layer needs to be maintained between the inner and outer tubes to prevent heat conduction.

[0003] In the production process of solar vacuum tubes, a vacuum pump is used to remove the air from the center of the inner and outer tubes. At the same time, a heating source is used to heat the sealing area before sealing. This method makes it difficult to maintain a negative pressure vacuum state inside the vacuum tube during the sealing process. In addition, the tube wall is not heated evenly. The negative pressure during suction may blow the unevenly heated tube wall, resulting in a decrease in the yield rate of vacuum tube production and an increase in production costs. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a vacuum tube negative pressure suction device.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0006] A vacuum tube negative pressure suction device includes a vacuum suction tube, a fixed sleeve, and a sealing device. The vacuum suction tube is internally divided into an interface, a Venturi nozzle, a suction interface, and an outlet. The interface is connected to an external compressed gas source and is connected to the Venturi nozzle. The side wall of the Venturi nozzle has a suction interface, and the outlet of the Venturi nozzle is connected to the outlet. The fixed sleeve includes a fixed ring, a connecting rod, a stabilizing cylinder, and a flame nozzle. The fixed ring is fitted onto the outside of the vacuum suction tube and is connected to the stabilizing cylinder via the connecting rod. The stabilizing cylinder is coaxially installed with the suction interface. The flame nozzles are evenly distributed on the inner wall of the stabilizing cylinder and pass through the stabilizing cylinder to connect to an external gas source. The sealing device includes a telescopic rod and a sealing sleeve. The telescopic rod is installed at the bottom of the stabilizing cylinder and is connected to the sealing sleeve.

[0007] Furthermore, a silencer is provided at the outlet of the vacuum suction pipe.

[0008] Furthermore, the stabilizing sleeve of the fixed sleeve is fixed in contact with the vacuum tube by a rubber gasket.

[0009] Furthermore, an anti-fall sleeve is provided below the sealing collar, and the inner wall of the anti-fall sleeve is provided with anti-slip protrusions.

[0010] According to the above technical solution, the beneficial effects of this utility model are as follows: the vacuum suction tube of this utility model uses the Venturi effect to extract the air from the vacuum tube, thereby achieving the vacuum tube to be drawn into a vacuum. At the same time as the vacuum tube is drawn into a negative pressure vacuum, the sealing device seals the air suction port of the vacuum tube to prevent gas leakage. Attached Figure Description

[0011] Figure 1 A schematic diagram of the overall structure of the vacuum tube negative pressure suction device;

[0012] Figure 2 A schematic diagram of the internal structure of a vacuum tube negative pressure suction device;

[0013] 1-Vacuum suction pipe; 11-Interface; 12-Venturi nozzle; 13-Suction interface; 14-Outlet; 15-Silencer; 2-Fixing sleeve; 21-Fixing ring; 22-Connecting rod; 23-Stabilizing cylinder; 24-Flame nozzle; 25-Rubber gasket; 3-Sealing device; 31-Telescopic rod; 32-Sealing collar; 33-Anti-fall sleeve. Detailed Implementation

[0014] To more clearly illustrate the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0015] See Figure 1-2 A vacuum tube negative pressure suction device includes a vacuum suction tube 1, a fixed sleeve 2, and a sealing device 3.

[0016] See Figure 1-2 The vacuum suction tube 1 is internally divided into an interface 11, a Venturi nozzle 12, a suction interface 13, and an outlet 14. The interface 11 is connected to an external compressed air source, and the interface 11 is connected to the Venturi nozzle 12. The side wall of the Venturi nozzle 12 is provided with a suction interface 13, and the outlet of the Venturi nozzle 12 is connected to the outlet 14. Compressed air is introduced into the vacuum suction tube 1 through the interface 11. The compressed air flows through the Venturi nozzle 12. During this process, the air velocity increases and is compressed. After the compressed air flows through the nozzle, the velocity decreases again and a vacuum is generated, so that air is drawn in through the suction interface 13. The drawn-in air and compressed air are discharged through the outlet 14.

[0017] See Figure 1-2The fixed sleeve 2 includes a fixed ring 21, a connecting rod 22, a stabilizing cylinder 23, and a flame nozzle 24. The fixed ring 21 is fitted onto the outside of the vacuum suction tube 1. The fixed ring 21 is connected to the stabilizing cylinder 23 through the connecting rod 22. The stabilizing cylinder 23 is coaxially installed with the suction interface 13. The flame nozzles 24 are evenly distributed on the inner wall of the stabilizing cylinder 23. The flame nozzles 24 pass through the stabilizing cylinder 23 and connect to an external gas source. The stabilizing cylinder 23 is connected to the vacuum tube and is used to fix the vacuum tube to prevent displacement of the vacuum tube during the negative pressure suction process and reduce the probability of gas leakage during the negative pressure suction process. The flame nozzles 24 heat the vacuum tube wall evenly, which can prevent leakage caused by uneven heating of a certain part of the vacuum tube wall during the sealing stage.

[0018] See Figure 1-2 The sealing device 3 includes a telescopic rod 31 and a sealing collar 32. The telescopic rod 31 is installed at the bottom of the stabilizing cylinder 23. The telescopic rod 31 is connected to the sealing collar 32, which is connected to the vacuum tube. During the sealing stage, the telescopic rod 31 is extended after the tube wall is heated, so that the sealing collar 32 is moved away from the flame nozzle 24, thereby achieving the sealing of the vacuum tube.

[0019] See Figure 1-2 A silencer 15 is provided at the outlet 14 of the vacuum suction pipe 1 to reduce the noise generated by the outlet airflow and avoid noise pollution.

[0020] See Figure 1-2 The stabilizing sleeve 23 of the fixed sleeve 2 is fixed in contact with the vacuum tube by a rubber gasket 25. The rubber gasket 25 can prevent the stabilizing sleeve 23 from scratching the wall of the vacuum tube.

[0021] See Figure 1-2 A fall-proof sleeve 33 is provided below the sealing ring 32. The inner wall of the fall-proof sleeve is provided with anti-slip protrusions. The fall-proof sleeve 33 is used to stabilize the vacuum tube and prevent the vacuum tube from slipping out of the sealing ring 32 after sealing is completed.

[0022] According to the above embodiments, the working process of this utility model is as follows:

[0023] The glass tube to be vacuumed is inserted into the suction port 13 through the center of the anti-drop sleeve 34, the sealing collar 32, and the stabilizing cylinder 23. The compressed air source is connected to the port 11, and high-speed compressed gas is introduced into the vacuum suction tube 1. The compressed air flows through the Venturi nozzle 12. During this process, the air velocity increases and is compressed. After the compressed air flows through the nozzle, the velocity decreases again and a vacuum is generated, so that air is drawn in through the suction port 13. The drawn-in air and compressed air are discharged through the outlet 14, realizing negative pressure suction of the vacuum tube. When the suction reaches the end, the flame source of the flame nozzle 24 is activated to uniformly heat the tube wall, soften the tube wall, extend the telescopic rod 31, and cause the sealing collar 32 to drive the tube wall to extend. After gradually closing, it is slowly pulled out to realize the sealing of the vacuum tube.

[0024] The above-disclosed embodiments of the present invention are only for illustrating the present invention. The preferred embodiments do not describe all details exhaustively, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A vacuum tube negative pressure suction device, characterized by: Vacuum suction pipe (1), fixed sleeve (2), sealing device (3) are included. The vacuum suction pipe (1) is internally divided into an interface (11), a Venturi nozzle (12), a suction interface (13), and an air outlet (14). The interface (11) is connected to an external compressed gas source. The interface (11) is in communication with the Venturi nozzle (12). The Venturi nozzle (12) has a suction interface (13) on its side wall. The Venturi nozzle (12) is connected to the air outlet (14) at its outlet. The fixed sleeve (2) includes a fixed ring (21), a connecting rod (22), a stabilizing cylinder (23), and a fire nozzle (24). The fixed ring (21) is fitted outside the vacuum suction pipe (1). The fixed ring (21) is connected to the stabilizing cylinder (23) through the connecting rod (22). The stabilizing cylinder (23) is coaxially installed with the suction interface (13). The fire nozzles (24) are evenly arranged on the inner wall of the stabilizing cylinder (23). The fire nozzles (24) pass through the stabilizing cylinder (23) to communicate with an external gas source. The sealing device (3) includes an extension rod (31) and a sealing sleeve ring (32). The extension rod (31) is installed at the bottom end of the stabilizing cylinder (23). The extension rod (31) is connected to the sealing sleeve ring (32).

2. The vacuum tube negative pressure suction device according to claim 1, wherein: The air outlet (14) of the vacuum suction pipe (1) is provided with a silencer (15).

3. The vacuum tube negative pressure suction device according to claim 1, wherein: The stabilizing cylinder (23) of the fixed sleeve (2) is in contact with the vacuum pipe through a rubber gasket (25) for fixation.

4. The vacuum tube negative pressure suction device according to claim 1, wherein: The sealing sleeve ring (32) is provided below with an anti-falling sleeve (33). The inner wall of the anti-falling sleeve (33) is provided with anti-slip convex points.

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