Vacuumizing device

Abstract

The utility model discloses a vacuumizing device, and belongs to the field of vacuumizing application. The device comprises a connecting nut, a vacuumizing sleeve, a compression nut, a pull rod, a KF40 joint and a vacuumizing seat, a stepped main cavity is formed in the vacuumizing sleeve in the axial direction in a penetrating mode, a secondary cavity communicating with the main cavity is formed in the side wall of one side of the vacuumizing sleeve, and a KF40 connector is arranged in the secondary cavity so that the secondary cavity can be connected with a vacuum pump KF40 connector. The bottom of the vacuumizing sleeve is fixedly connected with the top side of the vacuumizing base through a connecting nut, and the top of the vacuumizing sleeve is fixedly connected with the pull rod through a pressing nut. The lower portion of the pull rod penetrates through the main cavity of the vacuumizing sleeve, and the bottom of the pull rod extends into the piston of the vacuumizing base and can be fixedly connected with the piston in a threaded mode. The device disclosed by the utility model is used for small-volume vacuumizing, and has the advantages of convenience, low cost and reliability. The vacuumizing tool is matched with a vacuumizing seat for use. The size of the sleeve is increased, the welded KF40 connector is matched, and the O-shaped ring, the vacuum sealant and the like are added, so that the sealing performance and the air exhaust efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the field of vacuuming applications, and in particular relates to a vacuuming device. Background Art

[0002] In the prior art, the vacuum port of the vacuum device is usually KF25.

[0003] For example, the Chinese utility model patent with application number CN200620138384.4 provides a portable vacuum gauge calibration device, which includes a calibration chamber, a micro-adjusting valve, a standard vacuum gauge, a calibrated vacuum gauge, a molecular pump, a plug valve, a cut-off valve, a mechanical pump, a cut-off valve and a bellows. Although the device is miniaturized, small in size, light in weight and easy to carry, it meets the needs of on-site calibration of vacuum gauges and improves the stability and accuracy of calibration. However, the interface between the two cut-off valves and the cut-off valve components is KF16 to KF25. The Chinese utility model patent with application number CN201821187808.5 provides a vacuum pumping device for a magnet vacuum interface assembly, which includes a bottom plate and a cover plate, the two ends of the cover plate are sleeved with connecting rods, the bottom of the connecting rod is connected to the two ends of the top of the bottom plate, the top of the connecting rod is provided with a fixing member, the top of the cover plate and the bottom of the bottom plate are both connected with a vacuum pipe, and the bottom of the cover plate and the top of the bottom plate are both provided with a sealing member. Although the device improves the existing magnet vacuum interface assembly exhaust equipment and solves the problems of complex structure, high cost and difficulty in accurately controlling and grasping the vacuum degree of the vacuum parts of the existing magnet vacuum interface assembly exhaust equipment, the vacuum pipe used in the component is the KF25 vacuum pipe.

[0004] However, the commonly used KF25 vacuum port in the prior art has poor compatibility with the vacuum port KF40 of the existing vacuum pump and is prone to air leakage. Therefore, it is urgent to provide a new vacuum device. Utility Model Content

[0005] The utility model aims to overcome the defects in the prior art and provide a vacuum pumping device. The utility model improves the size of the traditional vacuum pumping device, adds an O-ring, and changes to a KF40 vacuum port, thereby reducing air leakage and improving vacuum pumping efficiency.

[0006] The specific technical solutions adopted by this utility model are as follows:

[0007] The utility model provides a vacuum pumping device, comprising a connecting nut, a vacuum pumping sleeve, a compression nut, a pull rod, a KF40 joint and a vacuum pumping seat;

[0008] A stepped main cavity is axially penetrated inside the vacuum sleeve, a secondary cavity connected to the main cavity is formed on one side wall, and a KF40 joint is provided in the secondary cavity to achieve connection with the KF40 interface of the vacuum pump; the bottom of the vacuum sleeve is fixedly connected to the top side of the vacuum seat by a connecting nut, and the top is fixedly connected to the pull rod by a clamping nut; a chamber is axially penetrated inside the vacuum seat, a piston is sealingly and slidably connected to the inner wall of the top side of the chamber, and the bottom side is used for sealing connection with the housing of the equipment to be vacuumed; the lower part of the pull rod penetrates the main cavity of the vacuum sleeve and the bottom extends into the piston of the vacuum seat, and the bottom of the pull rod can be threadedly fixedly connected to the piston.

[0009] Preferably, the top of the pull rod is a cross-shaped structure for easy rotation.

[0010] Preferably, the pull rod and the clamping nut are threadedly connected, and the connection between the pull rod, the clamping nut and the vacuum sleeve is filled with vacuum sealing putty.

[0011] Preferably, the vacuum seat and the vacuum sleeve are sealed by a first O-ring and a second O-ring.

[0012] Preferably, the pull rod drives the piston to slide axially, thereby achieving sealing and communication of the vacuum seat chamber.

[0013] Preferably, the main chamber of the vacuum sleeve comprises a first inner cavity, a second inner cavity, a third inner cavity, a fourth inner cavity and a fifth inner cavity which are connected in sequence along the axial direction; the axial length of the first inner cavity is 12 mm, and the radial width is 26 mm; the axial length of the second inner cavity is 12 mm, and the radial width is 14 mm; the axial length of the third inner cavity is 8.3 mm, and the radial width is 8.8 mm; the axial length of the fourth inner cavity is 63.7 mm, and the radial width is 26.6 mm; the axial length of the fifth inner cavity is 9 mm, and the radial width is 30.7 mm.

[0014] Preferably, the axial direction of the secondary cavity is perpendicular to the axial direction of the main cavity, and the diameter of the secondary cavity is 36 mm.

[0015] Preferably, the KF40 joint in the secondary cavity is connected by welding.

[0016] Preferably, a plurality of sealing rings are provided between the inner wall of the vacuum seat and the piston to achieve a sealed sliding connection.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The device of the utility model is used for small volume vacuuming, and has the advantages of convenience, low cost and reliability. The vacuuming tool is used in conjunction with the vacuuming seat. The sleeve size is enlarged, the welded KF40 joint is matched, and O-rings, vacuum sealants, etc. are added to improve the sealing and vacuuming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the vacuum pumping device of the utility model;

[0020] Figure 2 The front view (a) and side view (b) of the connecting nut;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the vacuum sleeve;

[0022] Figure 4 The front view (a) and side view (b) of the compression nut;

[0023] Figure 5 The front view (a) and top view (b) of the tie rod;

[0024] Figure 6 It is a structural schematic diagram of the vacuum seat;

[0025] The reference numerals in the figure are: connecting nut 1, vacuum sleeve 2, vacuum sealing putty 3, compression nut 4, pull rod 5, KF40 joint 6, first O-ring 7, second O-ring 8, vacuum seat 9. DETAILED DESCRIPTION

[0026] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific implementations. The technical features of each implementation of the present invention can be combined accordingly without conflicting with each other.

[0027] like Figure 1 As shown, a vacuum pumping device provided by the utility model mainly comprises a connecting nut 1, a vacuum pumping sleeve 2, a compression nut 4, a pull rod 5, a KF40 joint 6 and a vacuum pumping seat 9.

[0028] The structure and connection method of each component will be described in detail below.

[0029] In the present utility model, if Figure 3 As shown, a stepped main cavity is axially penetrated inside the vacuum sleeve 2, a secondary cavity connected to the main cavity is formed on one side wall, and a KF40 connector 6 is provided in the secondary cavity to achieve connection with the vacuum pump KF40 interface.

[0030] As a preferred embodiment of the utility model, the main chamber of the vacuum sleeve 2 mainly includes the first inner cavity, the second inner cavity, the third inner cavity, the fourth inner cavity and the fifth inner cavity which are connected in sequence along the axial direction. Among them, the axial length of the first inner cavity is 12mm, and the radial width is 26mm; the axial length of the second inner cavity is 12mm, and the radial width is 14mm; the axial length of the third inner cavity is 8.3mm, and the radial width is 8.8mm; the axial length of the fourth inner cavity is 63.7mm, and the radial width is 26.6mm; the axial length of the fifth inner cavity is 9mm, and the radial width is 30.7mm. The axial direction of the secondary cavity is perpendicular to the axial direction of the main cavity, and the diameter of the secondary cavity is 36mm. The connection method of the KF40 joint 6 in the secondary cavity is welding.

[0031] In the present invention, the bottom of the vacuum sleeve 2 (i.e. Figure 1 The right side of the middle part) is fixedly connected to the top side of the vacuum seat 9 through the connecting nut 1, and the top (i.e. Figure 1 The left end in the middle is fixedly connected to the pull rod 5 through a clamping nut 4.

[0032] As a preferred embodiment of the present invention, Figure 2 and 4 As shown in the figure, they are schematic diagrams of the connection nut and the compression nut. Figure 1 As shown, the vacuum seat 9 and the vacuum sleeve 2 can be sealed by a first O-ring 7 and a second O-ring 8, and a plurality of sealing rings are arranged between the inner wall of the vacuum seat 9 and the piston to achieve a sealed sliding connection.

[0033] In the present utility model, if Figure 6 As shown, a chamber is provided in the axial direction inside the vacuum seat 9, a piston is sealingly and slidably connected to the inner wall of the top side of the chamber, and the bottom side is used for sealing connection with the housing of the device to be vacuumed. The lower part of the pull rod 5 passes through the main cavity of the vacuum sleeve 2 and the bottom extends into the piston of the vacuum seat 9, and the bottom of the pull rod 5 can be threadedly fixedly connected with the piston.

[0034] As a preferred embodiment of the present invention, Figure 5 As shown, the top of the tie rod 5 can be designed as a cross-shaped structure for easy rotation. The tie rod 5 is threadedly connected to the clamping nut 4, and the connection between the tie rod 5, the clamping nut 4 and the vacuum sleeve 2 is filled with vacuum sealing glue 3. In actual use, the tie rod 5 drives the piston to slide along the axial direction, so that the vacuum seat 9 chamber can be closed and connected.

[0035] Based on the above vacuum pumping device of the utility model, the operation process in actual use is as follows:

[0036] First, install the vacuum seat 9 on the housing of the vacuum component, then install the first O-ring 7 and the second O-ring 8, fix the connection nut 1 and the bottom thread of the vacuum sleeve 2, and fill the connection with vacuum sealant. Press the clamping nut 4 on the top of the vacuum sleeve 2, insert the pull rod 5 from the top of the vacuum sleeve 2 into the clamping nut 4, the vacuum sleeve 2 and the vacuum seat 9 in turn, and connect them with the piston spiral, and keep each connection sealed. Connect the vacuum pump to the KF40 connector 6 of the vacuum device, and pull the pull rod 5 outward (i.e. Figure 1 The left side is pulled a certain distance (about 30mm in this embodiment) to drive the piston to slide, so that the vacuum pump, KF40 connector 6, vacuum sleeve 2, vacuum seat 9 and the part to be vacuumed are connected, and the vacuum pump is turned on. When the vacuum value reaches the requirement, push the pull rod 5 to move a certain distance (about 30mm in this embodiment), and then remove the KF40 interface, vacuum sleeve 2, pull rod 5, etc. Finally, fill the connection between the vacuum seat 9 and the part to be vacuumed with vacuum sealant, and then cover it with a plastic protective cover to extend the vacuum life.

[0037] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A vacuum pumping device, characterized in that: It comprises a connecting nut (1), a vacuum sleeve (2), a clamping nut (4), a pull rod (5), a KF40 connector (6) and a vacuum seat (9); The vacuum sleeve (2) is provided with a stepped main cavity extending axially therethrough, and a secondary cavity connected to the main cavity is provided on one side wall, and a KF40 connector (6) is provided in the secondary cavity to achieve connection with the KF40 interface of the vacuum pump; the bottom of the vacuum sleeve (2) is fixedly connected to the top side of the vacuum seat (9) via a connecting nut (1), and the top is fixedly connected to the pull rod (5) via a clamping nut (4); the vacuum seat (9) is provided with a chamber extending axially therethrough, and the inner wall of the top side of the chamber is sealingly and slidably connected with a piston, and the bottom side is used for sealing connection with the housing of the equipment to be vacuumed; the lower part of the pull rod (5) extends through the main cavity of the vacuum sleeve (2) and the bottom extends into the piston of the vacuum seat (9), and the bottom of the pull rod (5) is threadedly fixedly connected to the piston.

2. A vacuum pumping device according to claim 1, characterized in that: The top of the pull rod (5) is a cross-shaped structure that is easy to rotate.

3. A vacuum pumping device according to claim 1, characterized in that: The pull rod (5) and the clamping nut (4) are threadedly connected, and the connection between the pull rod (5), the clamping nut (4) and the vacuum sleeve (2) is filled with vacuum sealing glue (3).

4. A vacuum pumping device according to claim 1, characterized in that: The vacuum seat (9) and the vacuum sleeve (2) are sealed via a first O-type sealing ring (7) and a second O-type sealing ring (8).

5. A vacuum pumping device according to claim 1, characterized in that: The pull rod (5) drives the piston to slide in the axial direction, thereby achieving the closure and connection of the chamber of the vacuum seat (9).

6. A vacuum pumping device according to claim 1, characterized in that: The main chamber of the vacuum sleeve (2) comprises a first inner chamber, a second inner chamber, a third inner chamber, a fourth inner chamber and a fifth inner chamber which are connected in sequence along the axial direction; the first inner chamber has an axial length of 12 mm and a radial width of 26 mm; the second inner chamber has an axial length of 12 mm and a radial width of 14 mm; the third inner chamber has an axial length of 8.3 mm and a radial width of 8.8 mm; the fourth inner chamber has an axial length of 63.7 mm and a radial width of 26.6 mm; the fifth inner chamber has an axial length of 9 mm and a radial width of 30.7 mm.

7. A vacuum pumping device according to claim 1, characterized in that: The axial direction of the secondary cavity is perpendicular to the axial direction of the main cavity, and the diameter of the secondary cavity is 36 mm.

8. A vacuum pumping device according to claim 1, characterized in that: The connection method of the KF40 joint (6) in the secondary cavity is welding.

9. A vacuum pumping device according to claim 1, characterized in that: A plurality of sealing rings are arranged between the inner wall of the vacuum seat (9) and the piston to achieve a sealed sliding connection.

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