CN221762147U - New structure of compressor piston cover - Google Patents

Abstract

The utility model relates to the field of structural engineering, and discloses a new structure of a compressor piston cover, including a piston body, a cylindrical countersunk hole coaxially provided at the end of the piston body away from the piston rod, and a screw plug is connected by thread in the cylindrical countersunk hole; a plurality of superior arc-shaped threaded bore holes are provided at the end of the piston body away from the piston rod, and a plurality of inferior arc-shaped threaded bore holes are distributed in a circular array about the central axis of the piston body, and a plurality of inferior arc-shaped threaded bore holes are provided on the screw plug, and the inferior arc-shaped threaded bore holes correspond to the superior arc-shaped threaded bore holes one by one, and each inferior arc-shaped threaded bore hole matches the corresponding superior arc-shaped threaded bore hole and together form a complete slit threaded bore hole; a screw is threadedly connected in each slit threaded bore hole; and the threaded portion of the screw plug and the threaded portion of the screw are sprayed with locking glue. The utility model connects the screw plug and the piston body by screws, and at the same time, the threaded portions of the screw and the screw plug are sprayed with locking glue, so as to prevent the screw plug from loosening or even falling off, and reduce the risk of accidents.

Description

New structure of compressor piston cover

Technical Field

The utility model relates to the field of structural engineering, in particular to a new type of compressor piston cover structure.

Background Art

A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. The actual responsibility of the compressor is to increase the pressure, raising the suction pressure state to the exhaust pressure state.

In order to reduce the weight of the piston plug body, thereby reducing the operating load and reducing the operating cost, the piston plug body in the existing DW type hydrogen compressor adopts a hollow structure. On the basis of this structure, a screw plug is required to seal the piston body. Since the screw plug may fall off during the movement of the piston, the piston needs to be treated to prevent it from falling off.

In the prior art, a locking plate is generally used to prevent disengagement. Since the locking plate is easily broken and loosened during the reciprocating motion of the piston body, it is very easy to cause the screw plug to loosen or even fall off, causing the screw plug to collide with the cylinder body, hydrogen leakage, and fire and explosion risks.

Therefore, it is necessary to solve the above problems by adopting a new type of compressor piston cover structure.

Summary of the invention

The purpose of the utility model is to provide a new structure of a compressor piston cover to solve the problems raised in the above background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel structure of a compressor piston cover, comprising a piston body, wherein a cylindrical countersunk hole is coaxially provided at the end of the piston body away from the piston rod, and a portion of the cylindrical countersunk hole near the piston rod is threadedly connected to a screw plug; a plurality of superior arc-shaped threaded drill holes are provided at the end of the piston body away from the piston rod, and a plurality of inferior arc-shaped threaded drill holes are distributed in a circular array about the central axis of the piston body, and a plurality of inferior arc-shaped threaded drill holes are provided on the screw plug, and the inferior arc-shaped threaded drill holes correspond to the superior arc-shaped threaded drill holes one by one, Each inferior arc-shaped threaded drill hole matches with the corresponding superior arc-shaped threaded drill hole and together they form a complete slit threaded drill hole, wherein the slit is a gap formed between the non-threaded portion of the screw plug and the non-threaded portion of the cylindrical countersunk hole of the piston body 1; a screw is threadedly connected in each complete slit threaded drill hole; the threaded portion of the screw plug and the threaded portion of the screw are sprayed with locking glue; the locking glue of the threaded portion of the screw plug fixes the screw plug and the piston body, and the locking glue of the threaded portion of the screw fixes the screw and the screw plug, and also fixes the screw and the piston body.

Preferably, a gasket is coaxially arranged in the cylindrical countersunk hole, the gasket is located between the piston body and the screw plug, and the screw plug and the piston body are sealed and connected through the gasket.

Technical effects and advantages of the utility model:

First, the utility model connects the screw plug and the piston body by screws, and the threaded parts of the screws and the screw plug are sprayed with locking glue, so the screws and the screw plug will not loosen due to the reciprocating motion of the piston body, preventing the screw plug from loosening or even falling off, causing the screw plug to collide with the cylinder body, hydrogen leakage, fire and explosion and other production accidents.

Secondly, the utility model reduces the maintenance frequency and the maintenance and use costs because the nails and the screw plug will not become loose due to the reciprocating motion of the piston body.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic front cross-sectional view of the utility model;

Fig. 2 is a left side view of the present invention.

In the figure: 1. Piston body; 2. Screw plug; 3. Screw; 4. Gasket.

DETAILED DESCRIPTION

The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

The utility model provides a new type of compressor piston cover structure, including a piston body 1. As shown in FIG1, an opening is left at the end of the piston body 1 away from the piston rod, and a cylindrical countersunk hole is drilled through the opening along the axial direction of the piston body 1. The cylindrical countersunk hole is threadedly connected to a screw plug 2, and the screw plug 2 is a cover and is matched with the cylindrical countersunk hole. The threaded part of the screw plug 2 is sprayed with locking glue, and the locking glue is 263 glue, which is used to fix the connection between the screw plug 2 and the piston body 1 to prevent the screw plug 2 from rotating during the reciprocating movement of the piston body 1.

An annular gasket 4 is coaxially placed in the cylindrical countersunk hole of the piston body 1. The gasket 4 is located between the piston body 1 and the screw plug 2. When the screw plug 2 completely enters the piston body 1, the screw plug 2 and the piston body 1 will squeeze the gasket 4 to form a sealed connection.

Four major arc-shaped threaded holes are drilled at the end of the piston body 1 away from the piston rod, and the four major arc-shaped threaded holes are distributed in a circular array along the central axis of the piston body 1. Four minor arc-shaped threaded holes are drilled at the end of the screw plug 2 away from the piston rod, and the four major arc-shaped threaded holes correspond to the four minor arc-shaped threaded holes one by one. Each major arc-shaped threaded hole matches the corresponding minor arc-shaped threaded hole and together form a complete slit threaded hole, which is a gap formed between the non-threaded portion of the screw plug 2 and the non-threaded portion of the cylindrical countersunk hole of the piston body. Screws 3 are threadedly connected in each complete threaded hole, and screws 3 are threadedly connected to both the screw plug 2 and the piston body 1. Screws 3 are used to limit the rotation of the screw plug 2 and to ensure that the screw plug 2 does not fall off.

The threaded part of each screw 3 is sprayed with locking glue, which is 263 glue, which is used to fix the connecting screw 3 and the screw plug 2, and to fix the connecting screw 3 and the piston body 1. Ensure that the screw 3 does not rotate or fall off.

Working principle:

When in use, first spray locking glue on the threaded part of the screw plug 2 and put the gasket 4 into the non-threaded part of the cylindrical countersunk hole of the piston body 1. Then screw the screw plug 2 to thread the screw plug 2 and the piston body 1. When the screw plug 2 completely enters the cylindrical countersunk hole, stop screwing the screw plug 2. At this time, the locking glue solidifies and fixes the piston body 1 and the screw plug 2. The screw plug 2 and the piston body 1 squeeze the gasket 4 and form a sealed connection. The four superior arc thread drill holes on the piston body 1 are connected with the corresponding inferior arc thread drill holes on the screw plug 2 to form a complete slit thread drill hole.

Then, spray locking glue on the threaded parts of the four screws 3, and then screw the four screws 3 into the corresponding slit threaded holes at a torque of 1820 N/m until the threaded part of each screw 3 is completely inserted into the corresponding slit threaded hole. At this time, the locking glue solidifies to fix the connection screw 3 and the screw plug 2, and also fix the connection screw 3 and the piston body 1.

Finally, tighten the screw 3 to knock out the damage and rivet it, then flatten the end face to the requirements of the drawing.

Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. Novel structure of compressor piston blank cap, including piston body (1), its characterized in that: the end part of the piston body (1) far away from the piston rod is coaxially provided with a cylindrical countersunk head hole, and the part of the cylindrical countersunk head hole close to the piston rod is in threaded connection with a screw plug (2); the end part of the piston body (1) far away from the piston rod is provided with a plurality of major arc screw holes, the plurality of minor arc screw holes are distributed in a circumferential array with respect to the central axis of the piston body (1), the screw plug (2) is provided with a plurality of minor arc screw holes, the minor arc screw holes are in one-to-one correspondence with the major arc screw holes, each minor arc screw hole is matched with the corresponding major arc screw hole and jointly forms a complete kerf screw hole, and the kerf is a gap formed between a non-screw part of the screw plug (2) and a non-screw part of a cylindrical countersink of the piston body (1); a threaded connection screw (3) is arranged in each complete kerf threaded borehole; the thread part of the screw plug (2) and the thread part of the screw (3) are sprayed with locking glue; the locking glue of the threaded part of the screw plug (2) is fixedly connected with the screw plug (2) and the piston body (1), and the locking glue of the threaded part of the screw (3) is fixedly connected with the screw (3) and the screw plug (2) and is also fixedly connected with the screw (3) and the piston body (1).

2. The novel structure of a compressor piston cover as set forth in claim 1, wherein: the cylindrical counter bore is internally and coaxially provided with a gasket (4), the gasket (4) is positioned between the piston body (1) and the screw plug (2), and the screw plug (2) is in sealing connection with the piston body (1) through the gasket (4).