Vacuum tank clamping device

Abstract

The utility model discloses a vacuum tank clamping device which comprises a first fixing plate, a second fixing plate, a first clamping arm, a second clamping arm, a telescopic driving mechanism and a spring, the first fixing plate is fixed on a tank, and the second fixing plate is fixed on a tank flange; the telescopic driving mechanism is hinged to the first fixing plate, and the first clamping arm is hinged to the telescopic end of the telescopic driving mechanism. The second clamping arm comprises a second clamping arm connecting part and a second clamping arm supporting part, the second clamping arm supporting part is hinged to the second fixing plate, and the second clamping arm connecting part is hinged to the first clamping arm; and the spring is connected with the hinged end of the first tightening arm and the connecting part of the second tightening arm. The vacuum tank body tightening device is convenient to use, does not occupy space, and can well achieve the effect of tightening a small vacuum tank body.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical equipment and relates to a vacuum tank body tightening device, in particular to a small vacuum tank body tightening device. Background Art

[0002] Small or medium-sized vacuum tanks generally use manual tightening devices. Manual tightening devices achieve tightening by rotating the screw. The screw often slips and is damaged. Secondly, it is difficult to tighten it with a handwheel or ratchet wrench.

[0003] The utility model patent CN 202578246 U discloses a pneumatic pre-tightening mechanism for a vacuum chamber door, in which the clamp body is connected to the flange support through a pin shaft, the clamp tail is connected to the cylinder push rod, and the clamp is pushed by the cylinder so that the clamp head presses the head flange to achieve a tightening effect.

[0004] The clamp of the pneumatic pre-tightening mechanism of the vacuum chamber door is relatively long, so the swing radius is relatively large, which brings problems such as occupying space. Therefore, improvements need to be made to solve the above problems and design a small vacuum tank body tightening device. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide a tank body tightening device that can be operated on a small vacuum tank, so as to achieve the purpose of being easy to use and not taking up space.

[0006] Technical solution: A vacuum tank body tightening device of the utility model comprises a first fixing plate, a second fixing plate, a first tightening arm, a second tightening arm, a telescopic driving mechanism and a spring, wherein the first fixing bottom plate is fixed on the tank body, and the second fixing plate is fixed on the tank body flange;

[0007] The telescopic driving mechanism is hinged to the first fixing plate, the first tightening arm is hinged to the telescopic end of the telescopic driving mechanism, and the first tightening arm has an inward folding angle in the middle;

[0008] The second tightening arm comprises a second tightening arm connecting portion and a second tightening arm supporting portion, the second tightening arm supporting portion is hinged to the second fixing plate, and the second tightening arm connecting portion is hinged to the first tightening arm;

[0009] The spring is connected to the hinged end of the first tightening arm and the connecting portion of the second tightening arm.

[0010] Furthermore, the first tightening arm has an inwardly folded corner in the middle, and the second tightening arm supporting portion is L-shaped.

[0011] Furthermore, a limiting block is arranged on the connecting portion of the second tightening arm, and a side of the limiting block opposite to the first tightening arm is a bevel.

[0012] Furthermore, the limiting block is welded on the second tightening arm connecting portion.

[0013] Furthermore, a bearing is provided at the free end of the first tightening arm.

[0014] Furthermore, the telescopic driving mechanism is a cylinder.

[0015] Beneficial effect: Compared with the prior art, the vacuum tank body tightening device of the utility model has a compact structure and a small rotation angle, so it occupies a small space and can tighten the cover plate located in a narrow space to ensure the sealing of the vacuum tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model in a tightened state.

[0017] Figure 2 It is a structural schematic diagram of the utility model in a loosened state.

[0018] Figure 3 It is a structural schematic diagram of the second tightening arm of the utility model. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-3 As shown, a vacuum tank body clamping device of the utility model includes a first fixing plate 1, a second fixing plate 2, a first clamping arm 3, a second clamping arm 4, a telescopic drive mechanism 6 and a spring 5. In a specific implementation, the first fixing plate 1 is fixed to the tank body by welding, and the second fixing plate 2 is fixed to the tank body flange by welding.

[0021] In this embodiment, the telescopic drive mechanism 6 is hinged to the first fixed plate 1, the first clamping arm 3 is hinged to the telescopic end of the telescopic drive mechanism 6, the first clamping arm 3 has an inward angle in the middle, and a rolling member 7 is provided at the free end of the first clamping arm 3. In a specific embodiment, the rolling member 7 adopts a bearing.

[0022] The second tightening arm 4 includes a second tightening arm connecting portion 42 and a second tightening arm supporting portion 41. The second tightening arm supporting portion 41 is L-shaped. A limiting block 8 is welded on the second tightening arm connecting portion 42. The side of the limiting block 8 opposite to the first tightening arm 3 is a hypotenuse. The second tightening arm supporting portion 41 is hinged on the second fixed plate 2. The second tightening arm connecting portion 41 is hinged at the corner of the first tightening arm 3.

[0023] The spring 5 is connected to the hinged end of the first tightening arm 3 and the second tightening arm connecting portion 42 .

[0024] In a specific embodiment, the telescopic drive mechanism 6 adopts a cylinder. When in use, the push rod of the cylinder is extended, and under the pull of the spring 5, the first tightening arm 3 and the second tightening arm 4 are pushed to move, thereby tightening the flange of the vacuum tank body. The bearing 7 can prevent the head of the free end of the first tightening arm 3 from biting when it is in force contact with the head flange, while obtaining the maximum preload force.

[0025] When the vacuum tank needs to be opened, the push rod of the cylinder is retracted, driving the first tightening arm 3 to loosen. At the same time, the spring 5 retracts, and the first tightening arm 3 abuts against the bevel of the limit block 8 to prevent the first tightening arm 3 from swinging too much.

Claims

1. A vacuum tank body tightening device, characterized in that: It comprises a first fixing plate (1), a second fixing plate (2), a first tightening arm (3), a second tightening arm (4), a telescopic drive mechanism (6) and a spring (5), wherein the first fixing plate (1) is fixed on the tank body, and the second fixing plate (2) is fixed on the tank body flange; The telescopic drive mechanism (6) is hinged to the first fixed plate (1), and the first tightening arm (3) is hinged to the telescopic end of the telescopic drive mechanism (6); The second tightening arm (4) comprises a second tightening arm connecting portion (42) and a second tightening arm supporting portion (41), the second tightening arm supporting portion (41) being hinged to the second fixing plate (2), and the second tightening arm connecting portion (42) being hinged to the first tightening arm (3); The spring (5) is connected to the hinged end of the first tightening arm (3) and the second tightening arm connecting portion (42).

2. The vacuum tank body tightening device according to claim 1, characterized in that: The first tightening arm (3) has an inwardly folded corner in the middle, and the second tightening arm support portion (41) is L-shaped.

3. The vacuum tank body tightening device according to claim 1, characterized in that: A limiting block (8) is provided on the second tightening arm connecting portion (42), and a side of the limiting block (8) opposite to the first tightening arm (3) is a beveled edge.

4. The vacuum tank body tightening device according to claim 3, characterized in that: The limiting block (8) is welded to the second tightening arm connecting portion (42).

5. The vacuum tank body tightening device according to claim 1, characterized in that: A rolling element (7) is provided at the free end of the first tightening arm (3).

6. The vacuum tank body tightening device according to claim 1, characterized in that: The telescopic driving mechanism (6) is a cylinder.

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