Anti-falling super nut for reciprocating piston compressor

Abstract

The utility model discloses an anti-off super nut for a reciprocating piston compressor, which comprises a nut body, a piston rod connecting hole is arranged in the center of the nut body, and the anti-off super nut is characterized in that a circle of bolt holes which are axially arranged are further arranged on the nut body, a pushing bolt is arranged in the bolt holes in a matched mode, and the pushing bolt is connected with the piston rod connecting hole. The pushing bolt comprises a bolt head, a bolt neck and a threaded body which are sequentially connected, the threaded body is in threaded fit with the bolt hole, a limiting section with the inner diameter reduced is arranged in the bolt hole, the limiting section is in limiting fit with the threaded body, and the corresponding bolt head and the corresponding bolt neck can penetrate through the limiting section in a matched mode. The device is simple in structure, low in cost, economical, safe, capable of being disassembled and used repeatedly, and long in service life.

Description

Technical Field

[0001] The utility model relates to an improved invention of a nut, in particular to an improved invention of an anti-stripping super nut for a reciprocating piston compressor. Background Art

[0002] The piston and piston rod of traditional reciprocating piston compressors are fastened by electric heating (see attached for details). Figure 4 The tightening method involves heating the end of the piston rod to cause it to expand and elastically stretch. The tightening nut is then rotated a certain angle to the specified engraved mark, then heating is stopped. The rod cools and the deformation is restored, achieving the required preload. This method is time-consuming, and the nut rotation angle is difficult to determine, making it difficult to determine the initial preload applied to the nut. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an anti-slip super nut for a reciprocating piston compressor.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: the anti-slip super nut for reciprocating piston compressor includes a nut body, a piston rod connecting hole is provided in the center of the nut body, and is characterized in that: a circle of axially arranged bolt holes is also provided on the nut body, and a push bolt is provided in the bolt hole, and the push bolt includes a bolt head, a bolt neck and a threaded body connected in sequence, the threaded body is threadedly matched with the bolt hole, and a limiting section with a reduced inner diameter is provided in the bolt hole, and the limiting section is limitedly matched with the threaded body, and the corresponding bolt head and bolt neck can match and pass through the limiting section.

[0005] The bolt head is located inside the bolt hole, and a screwing gap is reserved between the bolt head and the bolt hole.

[0006] The bolt head is located inside the bolt hole, and a screwing inner hole is provided on the bolt head.

[0007] The nut body is threadedly connected to the front end of the piston rod, and a nut body accommodating groove is provided on the corresponding piston.

[0008] The inner end of the nut body is provided with a washer, which is pressed between the end of the threaded body and the bottom of the accommodating groove.

[0009] The beneficial effect of the present invention is that the improved anti-slip super nut for reciprocating piston compressors has the following advantages: 1. The push bolt of this structure is designed to be placed inside the bolt hole, and the installation of the bolt is unidirectional, that is, it has an anti-slip function, which prevents it from falling into the cylinder due to loosening and causing property loss; 2. This structure has a larger push contact surface and a higher elastic deformation, so it is safer and more reliable and only requires an ordinary torque wrench to complete the installation, which truly saves time, effort and money; 3. This structure does not require the electric heating hole to be processed at the tail of the piston rod, avoiding the risk of stress concentration in this hole and greatly improving the service life of the piston rod; 4. After the structure is installed, the nut is in a suspended state, and its fatigue strength is greater, and the bolt will not be disengaged or loosened; 5. This structure has low cost, simple structure, economical and safe, can be disassembled and reused many times, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure 2 It is a top view of the structure of the present utility model.

[0013] Figure 3 This is a structural diagram of the utility model applied to a piston.

[0014] Figure 4 This is a diagram of the electric heating fastening structure in the background technology of this utility model. DETAILED DESCRIPTION

[0015] The accompanying drawings show the structure of the present invention, and the following further describes its relevant details in conjunction with the accompanying drawings. Figure 1-4 The anti-slip super nut for the reciprocating piston compressor includes a nut body 1, a piston rod connecting hole 11 is provided in the center of the nut body 1, and the piston rod connecting hole 11 is a threaded hole. The nut body 1 is also provided with a circle of axially arranged bolt holes 12, and a plurality of bolts are provided at intervals. A push bolt 2 is provided in the bolt hole 12, and the push bolt 2 includes a bolt head 21, a bolt neck 22 and a threaded body 23 connected in sequence. The threaded body 23 is threadedly matched with the bolt hole 12. A limiting section 3 with a reduced inner diameter is provided in the bolt hole 12. The limiting section 3 is limitedly matched with the threaded body 23, and the corresponding bolt head 21 and bolt neck 22 can match and pass through the limiting section 3.

[0016] As a further improved specific implementation, the bolt head 21 is located inside the bolt hole 12, and a screwing gap 4 is reserved between the bolt head 21 and the bolt hole 12; or, a screwing inner hole is provided on the bolt head 21, and the screwing gap is eliminated to facilitate the rotation of the bolt head 21.

[0017] As a further improved specific implementation, the nut body 1 is threadedly connected to the front end of the piston rod 5, and a corresponding piston 6 is provided with a nut body 1 receiving groove.

[0018] As a further improved specific embodiment, a washer 7 is provided at the inner end of the nut body 1 , and the washer 7 is pressed between the end of the threaded body 23 and the bottom of the receiving groove.

[0019] During installation of the present invention, the push bolt 2 is first inserted through the lower end of the bolt hole 12, with the bolt head 21 and the bolt neck 22 passing through the limiting section 3 of the bolt hole 12, and the threaded body 23 is limited in the limiting section 3. The nut body 1 is then threadedly connected to the front end of the piston rod and placed in the receiving groove of the piston. Finally, the push bolt 2 is screwed in, so that the threaded body 23 presses against the gasket, thereby obtaining the pre-tightening force required for tightening the nut body 1. Since the push bolt 2 is limited between the limiting section 3 of the threaded hole and the receiving groove, it has a slip-proof performance and prevents it from falling into the cylinder due to loosening.

[0020] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A super nut for preventing a reciprocating piston compressor from falling off, comprising a nut body, the center of which is provided with a piston rod connection hole, characterized in that: The nut body is also provided with a circle of axially arranged bolt holes, and a push bolt is arranged in the bolt hole. The push bolt includes a bolt head, a bolt neck and a threaded body connected in sequence. The threaded body is threadedly matched with the bolt hole. A limiting section with a reduced inner diameter is provided in the bolt hole. The limiting section is limitedly matched with the threaded body, and the corresponding bolt head and bolt neck can match and pass through the limiting section.

2. The anti-slip super nut for a reciprocating piston compressor according to claim 1, characterized in that: The bolt head is located inside the bolt hole, and a screwing gap is reserved between the bolt head and the bolt hole.

3. The anti-slip super nut for a reciprocating piston compressor according to claim 1, characterized in that: The bolt head is located inside the bolt hole, and a screwing inner hole is provided on the bolt head.

4. The anti-slip super nut for a reciprocating piston compressor according to claim 1, wherein: The nut body is threadedly connected to the front end of the piston rod, and a nut body accommodating groove is provided on the corresponding piston.

5. The anti-slip super nut for a reciprocating piston compressor according to claim 4, characterized in that: The inner end of the nut body is provided with a washer, which is pressed between the end of the threaded body and the bottom of the accommodating groove.

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