Cylinder head fixing mechanism of diaphragm compressor

Abstract

The utility model discloses a diaphragm compressor cylinder head fixing mechanism, and relates to the technical field of diaphragm compressor cylinder head fixing, the diaphragm compressor cylinder head fixing mechanism comprises a double-end stud, a nut 1 and a nut 2, the double-end stud respectively passes through a cylinder body and a cylinder cover of a compressor, the nut 1 is in threaded connection with one end of the double-end stud and is provided with a cutting edge, and the nut 2 is provided with a cutting edge. The cutting edge is tangent to the flange edge on the cylinder body, and the second nut is connected to the other end of the double-end stud in a threaded mode. According to the edge-cutting flange nut, the arc flange on the lower portion of one side edge of the hexagonal flange nut is cut off, the arc face of the wide flange is changed into a plane which is tangent to the flange face of a cylinder head, and when a torque wrench is used for tightening the nut on the side of a cylinder cover, the hexagonal flange nut on one side of the cylinder body is tangent to the flange edge of the cylinder cover; due to the resistance effect of the flange edge, rotation of the hexagonal flange nut is limited, the hexagonal flange nut is made to be static, and therefore the fixing effect is achieved, and pre-tightening of the cylinder head nut can be completed without other auxiliary tools and complex processes.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder head fixing for diaphragm compressors, and particularly relates to a cylinder head fixing mechanism for diaphragm compressors. Background Art

[0002] As the core component of a compressor, the cylinder head mainly consists of a cylinder block, a diaphragm, and a cylinder head cover. After the cylinder is assembled, pre-tightening is required. The nut needs to be loaded with the required pre-tightening force through a torque wrench to meet the sealing requirements of the cylinder head. The conventional method is to use a fixing device (such as a wrench) to support and fix the nut on one side of the cylinder head cover, and use a torque wrench to pre-tighten the nut on one side of the cylinder block. Since the nut on the cylinder head cover side remains stationary due to external fixation, the nut on the cylinder block side rotates under force to start tightening until the required pre-tightening force is reached. This method requires the use of fixing devices such as wrenches to fix the nut on the cylinder head cover side, increasing the use of tools, and the fixing device needs to be removed after pre-tightening. The entire operation process is complex, time-consuming, and laborious. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cylinder head fixing mechanism for diaphragm compressors to overcome the above-mentioned defects in the prior art.

[0004] A cylinder head fixing mechanism for diaphragm compressors includes a stud, a first nut, and a second nut. The stud passes through the cylinder block and the cylinder head cover of the compressor respectively. The first nut is threadedly connected to one end of the stud and has a cut edge, and the cut edge is tangent to the flange edge on the cylinder block. The second nut is threadedly connected to the other end of the stud.

[0005] Preferably, a plurality of studs are provided and evenly distributed along the circumference of the cylinder block and the cylinder head cover. The first nut and the second nut are threadedly connected to both ends of each stud respectively.

[0006] Preferably, the first nut is a hexagon flange nut.

[0007] Preferably, the cut edge is located on the wide flange of the hexagon flange nut.

[0008] The utility model has the following advantages:

[0009] The cut-edge flange nut designed by the utility model cuts off the lower arc flange on one side of the hexagon flange nut, making the wide flange arc surface become a plane and tangent to the flange surface of the cylinder head. When using a torque wrench to tighten the nut on the cylinder head cover side, the hexagon flange nut on the cylinder block side is tangent to the flange edge of the cylinder head cover. Due to the resistance of the flange edge, the rotation of the hexagon flange nut is restricted and it remains stationary, thus achieving the fixing effect. The pre-tightening of the cylinder head nut can be completed without other auxiliary tools and complex processes. Brief Description of the Drawings

[0010] Figure 1 This is a three-dimensional structural schematic diagram of the whole of the present utility model.

[0011] Figure 2 This is a structural schematic diagram of the whole of the present utility model.

[0012] Figure 3 This is a structural schematic diagram of the first nut of the present utility model.

[0013] Figure 4 is Figure 3 a cross-sectional view along the A-A direction in

[0014] Wherein: 1. Stud; 2. First nut; 21. Trimming edge; 22. Wide flange; 3. Second nut; 4. Cylinder block; 41. Flange edge; 5. Cylinder head. Specific embodiments

[0015] The following is a more detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings through the description of the embodiments, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present utility model.

[0016] As Figure 1 , 2 shown, the present utility model provides a diaphragm compressor cylinder head fixing mechanism, including a stud 1, a first nut 2 and a second nut 3. A plurality of the studs 1 are provided and evenly distributed along the circumference of the cylinder block 4 and the cylinder head 5;

[0017] In addition, the first nut 2 is a hexagonal flange nut. The first nut 2 is threadedly connected to one end of the stud 1. A trimming edge 21 is provided on the wide flange 22 of the hexagonal flange nut. The trimming edge 21 is tangent to the flange edge 41 on the cylinder block 4. The second nut 3 is threadedly connected to the other end of the stud 1.

[0018] As Figure 3 , 4 shown, the first nut 2 on one side of the cylinder block 4 is trimmed to remove the lower arc of one side of the hexagonal flange nut, making it a plane. The trimming edge can be tangent to the flange edge 41 on the side of the cylinder block 4. During the tightening process of the cylinder head nut, due to the resistance of the flange edge 41, the rotation of the first nut 2 is restricted and it is stationary, so as to achieve the fixing effect. The pre-tightening of the cylinder head nut can be completed without other auxiliary tools and complex processes.

[0019] During operation, after the cylinder body 4 and the cylinder head 5 are assembled, the stud 1 is inserted into the edge through holes of the cylinder body 4 and the cylinder head 5, one end of which is threadedly connected to the nut 2, and the other end is threadedly connected to the nut 2 3, and a torque wrench is used to apply a pre-tightening force F to the nut 2 3 on one side of the cylinder head 5. The nut 2 on the side of the cylinder body 4 is limited by the flange edge 41 on the cylinder body 4 (that is, a supporting force f is applied to the trimmed edge of the trimmed nut) and remains stationary until the pre-tightening force F reaches the required value.

[0020] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A diaphragm compressor cylinder head fixing mechanism, characterized in that: The invention comprises a stud (1), a nut 1 (2) and a nut 2 (3), wherein the stud (1) passes through a cylinder block (4) and a cylinder head (5) of a compressor respectively, the nut 1 (2) is threadedly connected to one end of the stud (1) and is provided with a cutting edge (21), the cutting edge (21) is tangent to a flange edge (41) on the cylinder block (4), and the nut 2 (3) is threadedly connected to the other end of the stud (1).

2. A diaphragm compressor cylinder head fixing mechanism according to claim 1, characterized in that: The stud bolts (1) are provided in a plurality and are evenly distributed along the circumference of the cylinder body (4) and the cylinder cover (5). The two ends of each stud bolt (1) are respectively threadedly connected with a nut 1 (2) and a nut 2 (3).

3. A diaphragm compressor cylinder head fixing mechanism according to claim 1, characterized in that: The nut one (2) is a hexagonal flange nut.

4. A diaphragm compressor cylinder head fixing mechanism according to claim 3, characterized in that: The cut edge (21) is located on the wide flange (22) of the hexagonal flange nut.

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