CN219388145U - Special device for disassembling and assembling plunger - Google Patents

Abstract

The utility model discloses a special device for disassembling and assembling a plunger, which comprises: push-pull rod, driving rod, support frame and hand wheel; one end of the push-pull rod enters the plunger and is connected with the plunger, the other end of the push-pull rod is connected with one end of the driving rod, the other end of the driving rod is connected with the supporting frame, and the hand wheel is fixed at the other end of the driving rod; the support frame is contacted with the inner surface and the outer surface of the end cover of the plunger pump. According to the technical content disclosed by the utility model, the plunger is pulled out and loaded by utilizing screw transmission, so that the plunger and a plunger cavity have good coaxiality and straightness, the plunger is uniformly stressed, and the contact surface of the plunger and the plunger cavity is not easy to damage; the same device can realize the pulling-out and loading of the plunger, is convenient for maintenance personnel to maintain quickly, and reduces the complexity of tool use.

Description

A special device for plunger disassembly

technical field

The utility model relates to the technical field of plunger pumps, in particular to a special device for disassembling and assembling plungers.

Background technique

The special device for dismantling and assembling the plunger is an auxiliary device for the disassembly, installation and maintenance of the plunger of the plunger pump. Under the high temperature and high pressure working conditions, the plunger will produce scale on the inner wall of the plunger cavity, which will affect the performance of the plunger. When replacing the plunger, it will be difficult to pull out due to the increase of friction due to scale.

In order for maintenance personnel to operate conveniently during maintenance and replacement of the plunger, the existing device that utilizes impact to pull out the plunger is used as an auxiliary tool. However, in the actual use process, the coaxiality of the plunger and the plunger chamber will be affected if the plunger is pulled out by the impact device, and friction will occur with the plunger chamber. The change of the impact force will cause the force of the plunger to be uneven, and the plunger chamber will be damaged during the pull-out process of the plunger.

Therefore, how to provide a special device for disassembling the plunger has become a technical problem that needs to be solved urgently in this field.

Utility model content

The purpose of the utility model is to provide a special device for disassembling and assembling the plunger.

According to the utility model, a special device for disassembling and assembling the plunger is provided, including a push-pull rod, a driving rod, a support frame and a hand wheel;

One end of the push-pull rod enters the plunger and is connected to the plunger, the other end of the push-pull rod is connected to one end of the drive rod, the other end of the drive rod is connected to the support frame, and the hand wheel is fixed to the other end of the drive rod; the support frame is in contact with the inner and outer surfaces of the end cover of the plunger pump.

Optionally, the support frame includes: a fixed structure and a contact structure;

The fixed structure is disc-shaped; the other end of the drive rod is connected to the center of the fixed structure; the contact structure is a right-angle structure; there are four contact structures, and one end of the four contact structures are respectively fixed at the positions of 0°, 90°, 180° and 270° of the fixed structure.

Optionally, the support frame further includes: movable clamping feet;

The movable clamping feet are arranged at the other end of the contact structure.

Optionally, the movable clamping foot 7 can move within a preset stroke.

Optionally, the connecting end of the push-pull rod and the plunger has a first thread with a predetermined length, which is screwed into the plunger through the first thread.

Optionally, the device further includes: a coupling buckle;

The other end of the push-pull rod is connected to one end of the driving rod through the coupling buckle.

Optionally, the other end of the driving rod is provided with a second thread, which is coupled with the internal thread of the support frame through the second thread.

Optionally, the device further includes: a lock nut;

The hand wheel is fixed on the other end of the driving rod through the locking nut.

According to the technical content disclosed in the utility model, it has the following beneficial effects: the plunger is pulled out and loaded by screw transmission, so that the plunger and the plunger chamber have good coaxiality and straightness, the force on the plunger is uniform, and the contact surface between the plunger and the plunger chamber is not easy to be damaged; the same device can realize the pulling out and loading of the plunger, which is convenient for maintenance personnel to quickly perform maintenance and reduces the complexity of tool use.

Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

Fig. 1 is an axonometric view of a special device for disassembling a plunger provided according to an embodiment;

Fig. 2 is a front view of a special device for disassembling a plunger according to an embodiment;

Figure 3 is a schematic diagram of the movable clamping feet.

Explanation of reference signs: 1-push-pull rod, 2-connection buckle, 3-driving rod, 4-support frame, 41-fixed structure, 42-contact structure, 5-lock nut, 6-hand wheel, 7-movable clamping foot.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature, and in no way serves as any limitation of the invention and its application or use.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

It should be noted that like numbers and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

According to the utility model, as shown in Figure 1 and Figure 2, a special device for disassembling and assembling the plunger is provided, including a push-pull rod 1, a driving rod 3, a support frame 4 and a hand wheel 6;

One end of the push-pull rod 1 enters the plunger and is connected to the plunger, the other end of the push-pull rod 1 is connected to one end of the drive rod 3, the other end of the drive rod 3 is connected to the support frame 4, and the hand wheel 6 is fixed on the other end of the drive rod 3; the support frame 4 contacts the inner and outer surfaces of the plunger pump end cover to form a stressed frame.

In some embodiments, the support frame 4 includes: a fixed structure 41 and a contact structure 42;

The fixed structure 41 is disc-shaped; the other end of the drive rod 3 is connected to the center of the fixed structure 41; the contact structure 42 is a right-angle structure; there are four contact structures 42, and one end of the four contact structures 42 is respectively fixed at the positions of 0°, 90°, 180° and 270° of the fixed structure 41.

The support frame 4 also includes: movable clamping feet 7;

The movable clamping foot 7 is disposed at the other end of the contact structure 42 .

As shown in FIG. 3 , the movable clamping feet 7 can move within a preset stroke, so that the lower clamping feet of the support frame 4 can enter the end cover hole of the plunger pump, contact the inner surface, and be stressed when the plunger is pulled out.

In some embodiments, the connecting end of the push-pull rod 1 and the plunger has a first thread with a predetermined length, which is screwed into the plunger through the first thread.

The device also includes: a coupling buckle 2;

The other end of the push-pull rod 1 is connected to one end of the drive rod 3 through the coupling buckle 2. The coupling buckle 2 makes the push-pull rod 1 and the drive rod 3 unaffected when rotating, and can be synchronized when stressed.

The other end of the driving rod 3 is provided with a second thread, which is coupled with the internal thread of the support frame 4 through the second thread.

The device also includes: a locking nut 5;

The hand wheel 6 is fixed on the other end of the driving rod 3 through the locking nut 5 .

Specific working principle: the supporting frame 4 is in contact with the inner and outer surfaces of the end cover of the plunger pump to form a stress frame, the hand wheel 6 rotates the limited thread of the driving rod 3 and the supporting frame 4 for screw transmission, the driving rod 3 transmits the push-pull force required by the push-pull rod 1, and the limited thread on the surface of the push-pull rod 1 is screwed into the plunger. , which is in contact with the inner surface and is stressed when the plunger is pulled out.

To sum up, the technical content disclosed in this utility model utilizes screw transmission to pull out and load the plunger, so that the plunger and the plunger cavity have good coaxiality and straightness, the force on the plunger is uniform, and the contact surface between the plunger and the plunger cavity is not easy to be damaged; the same device can realize the pulling out and loading of the plunger, which is convenient for maintenance personnel to quickly perform maintenance and reduces the complexity of tool use.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, rather than limiting the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims (8)

1. A plunger disassembly and assembly specific device, comprising: push-pull rod, driving rod, support frame and hand wheel;

one end of the push-pull rod enters the plunger and is connected with the plunger, the other end of the push-pull rod is connected with one end of the driving rod, the other end of the driving rod is connected with the supporting frame, and the hand wheel is fixed at the other end of the driving rod; the support frame is contacted with the inner surface and the outer surface of the end cover of the plunger pump.

2. The plunger assembling and disassembling dedicated apparatus as set forth in claim 1, wherein the supporting frame includes: a fixed structure and a contact structure;

the fixing structure is disc-shaped; the other end of the driving rod is connected with the center of the fixed structure; the contact structure is a right-angle structure; the contact structures are four, and one ends of the four contact structures are respectively fixed at the positions of 0 DEG, 90 DEG, 180 DEG and 270 DEG of the fixed structure.

3. The plunger assembly and disassembly specific apparatus as set forth in claim 2, wherein the support frame further comprises: a movable clamping foot;

the movable clamping pin is arranged at the other end of the contact structure.

4. A plunger assembly and disassembly special device according to claim 3, wherein the movable catch is movable within a predetermined travel.

5. The plunger assembly and disassembly device according to claim 4, wherein the connecting end of the push-pull rod and the plunger has a first thread of a predefined length, which is screwed into the plunger through the first thread.

6. The plunger assembly and disassembly specific apparatus as set forth in claim 5, further comprising: the connecting buckle;

the other end of the push-pull rod is connected with one end of the driving rod through the connecting buckle.

7. The plunger assembling and disassembling dedicated apparatus according to claim 6, wherein the other end of the driving rod is provided with a second screw thread, which is coupled with the internal screw thread of the supporting frame through the second screw thread.

8. The plunger assembly and disassembly specific apparatus as set forth in claim 7, further comprising: a lock nut;

the hand wheel is fixed at the other end of the driving rod through the locking nut.