Vacuumizing connection sealing device

Abstract

The utility model discloses a vacuumizing connection sealing device, which relates to the technical field of vacuum pumping and injection, and comprises a vacuum cover shell, a copper electrode, a guide gland and a corrugated pipe, one side of the vacuum cover shell is connected with a vacuum suction nozzle, the upper end of the vacuum cover shell is an electrode mounting port, and the lower end of the vacuum cover shell is a saddle-shaped port with the same curvature as a steel pipe; the guide gland is provided with an external thread which is arranged in the electrode mounting port, and a guide sealing ring is arranged between the lower end of the guide gland and the inner wall of the vacuum cover shell; the copper electrode is a cylinder, is inserted into the guide gland in a sliding sealing manner, and forms extrusion sealing with the guide sealing ring, and the lower end of the copper electrode extends into the inner cavity of the vacuum cover shell; the corrugated pipe is positioned in the inner cavity of the vacuum cover shell and sleeves the copper electrode, and two ends of the corrugated pipe are respectively fixed on the outer wall of the copper electrode and the inner wall of the vacuum cover shell in a sealing manner; the device adopts an embedded corrugated pipe mode, so that the sealing effect and the dynamic stability of the device are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum extraction and injection, in particular to a vacuum extraction and connection sealing device. Background Art

[0002] The vacuum connection sealing device is a vacuum sealing device widely used in the production process of thermal insulation pipe extraction and injection. One end is connected to the vacuum unit and the other end is connected to the steel pipe. It can easily form a vacuum extraction and injection channel connecting the vacuum unit and the steel pipe cavity.

[0003] At present, in the manufacturing process of insulated steel pipes, since the vacuum connection sealing device generally adopts the copper rod + sealing ring mode, the vacuum sealing effect is not good, resulting in micro-leakage, long pumping time, high energy consumption, low efficiency, seriously affecting production efficiency, forming a production bottleneck, causing backlog of steel pipe production lines and waste of energy, especially when it is necessary to pump to a high vacuum state, the micro-leakage will be more obvious. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum connection sealing device to address the defects of the prior art.

[0005] The technical scheme of the utility model is: a vacuum connection sealing device, comprising a vacuum cover shell, a copper electrode, a guide pressure cover and a bellows, wherein a vacuum nozzle is connected to one side of the vacuum cover shell, an upper end of which is an electrode mounting port, and a lower end of which is a saddle-shaped port with the same curvature as that of a steel pipe; an external thread is provided on the guide pressure cover, the thread is installed in the electrode mounting port, and a guide sealing ring is provided between the lower end and the inner wall of the vacuum cover shell; the copper electrode is a cylinder, a sliding seal of which is inserted in the guide pressure cover and forms an extrusion seal with the guide sealing ring, and the lower end of which probes into the inner cavity of the vacuum cover shell; the bellows is located in the inner cavity of the vacuum cover shell, and is sleeved on the outer side of the copper electrode, and its two ends are respectively sealed and fixed on the outer wall of the copper electrode and the inner wall of the vacuum cover shell.

[0006] Preferably, a mounting plate having the same curvature as the steel pipe is provided on the inner edge of the saddle-shaped opening, and an L-shaped sealing ring is clamped on the mounting plate.

[0007] Preferably, the lower end of the copper electrode is connected to a welding plug via an electrode joint.

[0008] Preferably, the guide sealing ring is a T-shaped sealing ring.

[0009] Preferably, the upper and lower ends of the bellows are respectively welded to the outer wall of the copper electrode and the inner wall of the vacuum cover shell.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] This device adopts an embedded bellows mode to ensure the sealing effect and dynamic stability of the device; this device can further ensure the sealing effect through L-shaped sealing rings and T-shaped sealing rings, effectively reduce the leakage of the vacuum chamber, improve efficiency, reduce energy consumption, and have more stable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0013] In the figure: 1. vacuum cover shell, 2. vacuum nozzle, 3. copper electrode, 4. guide pressure cover, 5. guide sealing ring, 6. bellows, 7. electrode joint, 8. welding plug, 9. mounting plate, 10. L-shaped sealing ring, 11. steel pipe. DETAILED DESCRIPTION

[0014] The utility model is further described below with reference to the accompanying drawings and embodiments. Embodiment 1

[0015] Reference Figure 1 As shown, a vacuum connection sealing device comprises a vacuum cover shell 1, a copper electrode 3, a guide pressure cover 4 and a bellows 6, wherein a vacuum nozzle 2 is connected to one side of the vacuum cover shell 1, the upper end of which is an electrode mounting port, and the lower end of which is a saddle-shaped port with the same curvature as the steel pipe 11; an external thread is provided on the guide pressure cover 4, the thread of which is mounted in the electrode mounting port, and a guide sealing ring 5 is provided between the lower end and the inner wall of the vacuum cover shell 1; the guide sealing ring 5 is a T-shaped sealing ring, the copper electrode 3 is a cylinder, the sliding seal of which is inserted in the guide pressure cover 4, and forms an extrusion seal with the guide sealing ring 5, and the lower end of which protrudes into the inner cavity of the vacuum cover shell 1; the lower end of the copper electrode 3 is connected to a welding plug 8 through an electrode joint 7, the bellows 6 is located in the inner cavity of the vacuum cover shell 1, and is sleeved on the outer side of the copper electrode 3, and the two ends of the bellows are respectively sealed and fixed on the outer wall of the copper electrode 3 and the inner wall of the vacuum cover shell 1.

[0016] In more detail, a mounting plate 9 having the same curvature as the steel pipe 11 is provided at the inner edge of the saddle-shaped opening, and an L-shaped sealing ring 10 is clamped on the mounting plate 9 .

[0017] When in use, the device is tightly pressed on the designated position of the outer wall of the steel pipe 11 through the L-shaped sealing ring 10. The steel pipe 11, the copper electrode 3, the bellows 6, the vacuum cover shell 1 and the L-shaped sealing ring 10 together form a closed cavity, which is isolated from the external air; the vacuum unit is connected through the outer end of the vacuum nozzle 2, and the vacuum unit performs vacuum operation on the steel pipe 11 through the device; after the vacuum is completed, the copper electrode 3 moves along the guide gland 4 toward the steel pipe 11 until the welding plug 8 is inserted into the pore of the steel pipe 11 wall, and finally the welding plug 8 is welded in the pore. The bellows 6 stretches or compresses with the movement of the copper electrode 3, ensuring the sealing of the device.

[0018] The device adopts a mode of embedded bellows 6 to ensure the sealing effect and dynamic stability of the device; the device can further ensure the sealing effect through L-shaped sealing ring 10 and T-shaped sealing ring, effectively reduce the leakage of the vacuum chamber, improve efficiency, reduce energy consumption, and have more stable performance. Embodiment 2

[0019] In this embodiment, the upper and lower ends of the bellows 6 are welded to the outer wall of the copper electrode 3 and the inner wall of the vacuum housing 1 respectively.

[0020] The present invention is not limited to the above-mentioned embodiments. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention. The changed contents still belong to the protection scope of the present invention.

Claims

1. A vacuum connection sealing device, comprising a vacuum housing, characterized in that: It also includes a copper electrode, a guide pressure cover and a bellows. A vacuum nozzle is connected to one side of the vacuum cover shell, and its upper end is an electrode mounting port, and its lower end is a saddle-shaped port with the same curvature as the steel pipe; the guide pressure cover is provided with an external thread, and its thread is installed in the electrode mounting port, and a guide sealing ring is provided between its lower end and the inner wall of the vacuum cover shell; the copper electrode is a cylinder, and its sliding seal is inserted in the guide pressure cover and forms an extrusion seal with the guide sealing ring, and its lower end probes into the inner cavity of the vacuum cover shell; the bellows is located in the inner cavity of the vacuum cover shell, and is sleeved on the outside of the copper electrode, and its two ends are respectively sealed and fixed on the outer wall of the copper electrode and the inner wall of the vacuum cover shell.

2. A vacuum connection sealing device according to claim 1, characterized in that: The inner edge of the saddle-shaped opening is provided with a mounting plate with the same curvature as the steel pipe, and an L-shaped sealing ring is clamped on the mounting plate.

3. The vacuum connection sealing device according to claim 1, characterized in that: The lower end of the copper electrode is connected with a welding plug through an electrode joint.

4. A vacuum connection sealing device according to claim 1, characterized in that: The guide sealing ring is a T-shaped sealing ring.

5. The vacuum connection sealing device according to claim 1, characterized in that: The upper and lower ends of the bellows are respectively welded to the outer wall of the copper electrode and the inner wall of the vacuum cover shell.

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