CN218325159U

CN218325159U - Straight pin crosshead

Info

Publication number: CN218325159U
Application number: CN202222256028.4U
Authority: CN
Inventors: 史金松; 施小军; 施爱民; 庄小云; 肖雷刚
Original assignee: Huaqiang Chemical Group Co Ltd
Current assignee: Huaqiang Chemical Group Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2023-01-17
Anticipated expiration: 2032-08-25

Abstract

The utility model relates to a straight pin crosshead, which comprises a crosshead main body, a crosshead pin arranged on the crosshead main body and a sealing limit component for reinforcing the connection between the crosshead pin and the crosshead main body, wherein the surface of the crosshead main body is provided with a mounting hole for the crosshead pin to be arranged in, and the sealing limit component comprises a limit part and a fixed sealing part for fixing the position of the limit part on the crosshead pin; the utility model discloses an established spacing portion and fixed seal portion, can carry out spacingly via spacing portion to the position of cross head round pin in the mounting hole in the cross head main part when, let fixed seal portion cover spacing gasket, it deviates from the draw-in groove on the cross head round pin to restrict, also can be under the effect of seal cover sealing member, with spacing gasket isolated with the external world, effectual reinforcement and the rust-resistant of realizing spacing gasket lose, when guaranteeing that the cross head round pin is fixed enough firm, also can make things convenient for the follow-up dismantlement of cross head round pin to change.

Description

Straight pin crosshead

Technical Field

The utility model relates to a cross head technical field, concretely relates to straight round pin cross head.

Background

The crosshead is a part for connecting the piston rod and the connecting rod, is commonly used in the compressor, can be matched with the piston rod, converts power generated by the piston which does linear reciprocating motion into force for driving the connecting rod to do swinging motion, is often applied to the compressor, and is an indispensable important part in the compressor.

The patent is published in China: in a novel crosshead body cross pin (application number: CN 201521138829.4) for an MH compressor, in order to avoid the situation that a conical crosshead pin is subjected to axial force in the crosshead and further the crosshead pin falls off, the cylindrical crosshead pin is arranged and matched with a locking gasket clamped on the crosshead pin to avoid the crosshead pin from falling off, although the anti-falling effect of the crosshead pin can be achieved, the crosshead needs to move along with a piston rod for a long time, the generated vibration is large, only a clamping mode is used, the locking gasket is easy to loosen and fall off, meanwhile, if the locking gasket is clamped tightly in a clamping groove, the situation of corrosion is difficult to avoid after long-time work, the locking gasket is difficult to take out of the clamping groove, the locking gasket is required to be tightly attached to the crosshead, the stressed surface is few, when the crosshead pin is disassembled, replaced or overhauled, the taking-out operation of the locking gasket is difficult, and the overhauling efficiency of an operator is influenced to a certain degree.

SUMMERY OF THE UTILITY MODEL

Based on the above expression, the utility model provides a straight round pin cross head to solve among the prior art and restrict the position of cross round pin in the cross head through the joint on the cross round pin gasket, connect firmly and be not convenient for after the corrosion take off's technical problem inadequately.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a straight pin crosshead comprising:

a crosshead body;

the crosshead pin is connected with the crosshead main body, and the surface of the crosshead main body is provided with a mounting hole for the crosshead pin to be installed;

the sealing and limiting assembly comprises a limiting part for limiting the position of the crosshead pin in the mounting hole, a fixed sealing part for fixing the position of the limiting part on the crosshead pin, and a reinforcing part for reinforcing the connection between the fixed sealing part and the crosshead pin.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the limiting part comprises a limiting gasket and a clamping groove which is formed in the surface of the crosshead pin and matched with the limiting gasket.

Furthermore, fixed sealing portion includes that the cage covers in the outside sealed cowling of spacing gasket, locates the inside sealing member of sealed cowling, locates the inside mounting of sealed cowling.

Further, the surface of seal cover is equipped with the through-hole that is worn out for the cross head round pin, the inside of seal cover surface through-hole and the position department that the seal cover surface is close to the cross head main part are located to the sealing member, the seal cover all laminates with the cross head main part with the sealing member.

Furthermore, the number of the limiting gaskets is more than or equal to two, and notches which are mutually matched are arranged between the adjacent limiting gaskets.

Furthermore, a plurality of combined limiting gaskets form an annular structure distributed around the cross head pin, and the combined limiting gaskets are matched with the inside of the sealing cover.

Furthermore, bayonets for the fixing pieces to extend into are arranged at the opposite positions of the notches of the adjacent limiting gaskets, and after the fixing pieces extend into the bayonets arranged on the adjacent limiting gaskets, the limiting gaskets of the plurality of combinations cannot be separated from the clamping grooves on the cross head pins.

Further, the reinforcing part is in threaded connection with the surface of the crosshead pin, and the surface of the reinforcing part is provided with a groove matched with the sealing cover.

Furthermore, the surface of the limiting gasket, which is positioned inside the clamping groove on the crosshead pin, is provided with a smooth cambered surface.

Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:

1. the utility model discloses an established spacing portion and fixed seal portion, can carry out spacingly via spacing portion to the position of cross head round pin in the mounting hole in the cross head main part, let fixed seal portion cover spacing gasket cage, it is deviate from the draw-in groove on the cross head round pin to restrict it, also can cover under the effect of sealing member in sealed, with spacing gasket isolated with the external world, effectual realization spacing gasket's reinforcement and rust-resistant lose, when guaranteeing that the cross head round pin is fixed enough firm, also can make things convenient for the follow-up dismantlement of cross head round pin to change.

2. The utility model discloses a notch and bayonet socket that establish on the spacing gasket, can be guaranteeing that spacing gasket can encircle the annular gasket structure of cross head pin surface shape, the atress is even, spacing effect to the cross head pin is better, and simultaneously, also can cooperate the mounting of establishing in the sealed cowling, come to restrict the position of spacing gasket, thereby can be inside to leave out certain allowance at the sealed cowling and ensure when spacing gasket packs into smoothly, also can ensure between the spacing gasket laminating that can be inseparable at the cross head epaxially, let the cross head axle firmly and stable and cross head bulk phase be connected.

Drawings

Fig. 1 is a schematic cross-sectional view of a straight pin crosshead according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1 from another perspective;

FIG. 3 is an enlarged view of a portion of area A of FIG. 1;

FIG. 4 is a schematic structural view of a fixing seal portion according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a reinforcement part according to an embodiment of the present invention;

in the drawings, the reference numbers indicate the following list of parts:

1. a crosshead body; 2. a crosshead pin; 3. sealing the limit component; 31. a limiting part; 311. a limiting gasket; 312. a card slot; 32. a fixed seal portion; 321. a sealing cover; 322. a seal member; 323. a fixing member; 33. a reinforcing part.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that spatial relationship terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The terms "comprises/comprising" or "having" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

In the description of the present technology, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present technology can be understood in a specific case to those of ordinary skill in the art.

Referring to fig. 1 to 5, a straight pin crosshead includes a crosshead body 1, a crosshead pin 2 mounted on the crosshead body 1, and a seal stopper assembly 3 reinforcing a connection between the crosshead pin 2 and the crosshead body 1, and a mounting hole for mounting the crosshead pin 2 is formed in a surface of the crosshead body 1.

Specifically, the sealing and limiting assembly 3 includes a limiting portion 31 for limiting the position of the crosshead pin 2 in the mounting hole, a fixing and sealing portion 32 for fixing the position of the limiting portion 31 on the crosshead pin 2, and a reinforcing portion 33 for reinforcing the connection between the fixing and sealing portion 32 and the crosshead pin 2, wherein the limiting portion 31 is a common limiting structure in the existing crosshead, and specifically includes a limiting gasket 311 and a clamping groove 312 arranged on the surface of the crosshead pin 2 and adapted to the limiting gasket 311, and the fixing and sealing portion 32 includes a sealing cover 321 covering the outside of the limiting gasket 311, a sealing member 322 arranged inside the sealing cover 321, and a fixing member 323 arranged inside the sealing cover 321, in the process of limiting and fixing the crosshead pin 2 by the limiting gasket 311, the limiting gasket 311 can be covered inside by the sealing cover 321, so that the limiting gasket 311 is effectively prevented from falling out of the clamping groove 312, and the inside of the sealing cover 321 can be sealed by the sealing member 322 arranged on the sealing cover 321, thereby realizing the anti-falling off of the limiting gasket 311 and sealing, and effectively reducing the possibility of damage and the labor of an operator for maintenance.

In order to facilitate the installation of the reinforcing part 33 and the fixation of the fixed seal part 32, the reinforcing part 33 is screwed to the surface of the crosshead pin 2, and the surface of the reinforcing part 33 is provided with a groove adapted to the seal cover 321, and the reinforcing part 33 is preferably in a nut-shaped structure, so that the reinforcing part 33 can be screwed by an operator using a wrench, and the contact area with the seal cover 321 can be increased by matching the groove provided on the surface, the friction force with the seal cover 321 is also increased, and a certain anti-slip effect is achieved.

In some embodiments, the surface of the sealing cover 321 is provided with a through hole for the crosshead pin 2 to penetrate out, the sealing element 322 is arranged in the through hole on the surface of the sealing cover 321 and at a position where the surface of the sealing cover 321 is close to the crosshead body 1, the sealing cover 321 and the sealing element 322 are both attached to the crosshead body 1, the sealing element 322 is preferably a sealing rubber ring, the inside of the sealing cover 321 can be isolated from the outside, and the outside air is prevented from contacting the limiting gasket 311 to cause the limiting gasket 311 and the clamping groove 312 to be rusted.

Considering that the stress on the surface of the crosshead pin 2 is more balanced by uniformly covering the limiting gaskets 311, but if the number of the limiting gaskets 311 is one, all the limiting gaskets 311 cannot be smoothly clamped into the clamping grooves 312, therefore, the number of the limiting gaskets 311 is greater than or equal to two, preferably two, and the adjacent limiting gaskets 311 are provided with notches which are mutually matched, and meanwhile, the combined limiting gaskets 311 form an annular structure distributed around the crosshead pin 2, and the combined limiting gaskets 311 are matched with the inside of the sealing cover 321, so that the stress between the limiting gaskets 311 and the crosshead pin 2 can be uniformly distributed, and the fixing stability of the crosshead pin 2 in the crosshead body 1 is effectively ensured.

Meanwhile, because the sealing cover 321 is required to cover all the limiting gaskets 311, in order to facilitate the installation of the sealing cover 321, a certain margin can be left in the sealing cover 321, on this basis, in order to ensure that the limiting gaskets 311 can be closely connected, please refer to fig. 2, the opposite positions of the notches formed by the adjacent limiting gaskets 311 are provided with bayonets for the fixing parts 323 to extend into, after the fixing parts 323 extend into the bayonets formed in the adjacent limiting gaskets 311, the limiting gaskets 311 of a plurality of combinations cannot be separated from the clamping grooves 312 formed in the crosshead pins 2, wherein the fixing parts 323 are preferably cylindrical structures, the manufacturing and processing are convenient, the overall stress is uniform, and the integrity of the plurality of limiting gaskets 311 in the sealing cover 321 after combination can be effectively ensured by using the principle of the mortise and tenon joint structure.

And because when screwing the fixed part, the fixed part may drive the sealed cowling 321 and rotate together, and the sealed cowling 321 then can drive spacing gasket 311 and rotate together, for the frictional force of convenient reduction spacing gasket 311 in draw-in groove 312, the surface that spacing gasket 311 is located draw-in groove 312 inside on cross head pin 2 is equipped with smooth cambered surface, ensures that the fixed part can be screwed up on cross head pin 2 tightly enough, reduces the not hard up probability after long-term work.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A straight pin crosshead comprising:

a crosshead body (1);

the crosshead pin (2) is connected with the crosshead main body (1), and the surface of the crosshead main body (1) is provided with a mounting hole for the crosshead pin (2) to be installed;

and the sealing and limiting assembly (3) comprises a limiting part (31) for limiting the position of the crosshead pin (2) in the mounting hole, a fixed sealing part (32) for fixing the position of the limiting part (31) on the crosshead pin (2), and a reinforcing part (33) for reinforcing the connection between the fixed sealing part (32) and the crosshead pin (2).

2. The straight pin crosshead according to claim 1, characterised in that the stop portion (31) comprises a stop washer (311) and a snap groove (312) provided on the surface of the crosshead pin (2) for fitting the stop washer (311).

3. The straight pin crosshead of claim 2, wherein the stationary seal part (32) comprises a seal housing (321) that houses the outer portion of the position limiting washer (311), a seal member (322) that is provided inside the seal housing (321), and a fixing member (323) that is provided inside the seal housing (321).

4. The straight pin crosshead according to claim 3, wherein the surface of the sealing cover (321) is provided with a through hole for the crosshead pin (2) to pass through, the sealing member (322) is arranged inside the through hole on the surface of the sealing cover (321) and at the position where the surface of the sealing cover (321) is close to the crosshead main body (1), and the sealing cover (321) and the sealing member (322) are attached to the crosshead main body (1).

5. The straight pin crosshead of claim 4, wherein the number of the limiting shims (311) is equal to or greater than two, and mutually fitting notches are provided between adjacent limiting shims (311).

6. The straight pin crosshead according to claim 5, characterised in that the combined plurality of spacing shims (311) form an annular structure distributed around the crosshead pin (2), and that the combined spacing shims (311) are adapted to the interior of the sealing cap (321).

7. The straight pin crosshead according to claim 6, wherein the opposite positions of the notches provided on adjacent limiting shims (311) are provided with bayonets into which the fixing members (323) are inserted, and after the fixing members (323) are inserted into the bayonets provided on the adjacent limiting shims (311), the combined limiting shims (311) are not separated from the clamping slots (312) on the crosshead pins (2).

8. A straight pin crosshead according to claim 1, characterised in that the reinforcement part (33) is threaded to the surface of the crosshead pin (2) and that the surface of the reinforcement part (33) is provided with recesses adapted to the sealing cups (321).

9. The straight pin crosshead according to claim 7, characterised in that the surface of the spacing washer (311) located inside the clamping groove (312) on the crosshead pin (2) is provided with a smooth curved surface.