CN212360153U - Split type cross head for pump - Google Patents

Abstract

The utility model provides a split type crosshead for a pump, which relates to the field of high-pressure plunger pump parts, and comprises a split type crosshead main body, a crosshead extension and a locking part, wherein in the later-stage actual use process, the abrasion degree of the crosshead extension is far less than that of the crosshead main body, so that a worker can only replace the crosshead main body, further the later-stage maintenance cost is reduced, and the cost is reduced; in addition, the crosshead main body and the crosshead extension can be manufactured independently, so that the post-processing of an inner cavity of the crosshead and a pin hole is avoided, and the production efficiency is improved; in addition, the locking component can lock the crosshead body and the crosshead extension in the axial direction, so that the joint of the crosshead body and the crosshead extension is prevented from being broken, and the overall strength of the crosshead can be effectively increased.

Description

Split type cross head for pump

Technical Field

The utility model relates to a high-pressure plunger pump spare part field especially relates to a pump is with split type cross head.

Background

The power end transmission mechanism of the existing high-pressure plunger pump mainly comprises three parts, namely a crankshaft, a connecting rod and a crosshead, wherein the connecting rod of the power end is connected with a ceramic plunger of a water end through the crosshead, and the crosshead plays a role in transition from top to bottom.

In the field of high-pressure plunger pumps, a crosshead is arranged in a crankcase, and in order to ensure the tightness of the crankcase, an oil seal is usually required to be matched and nested on a crosshead extension, so that the length of the crosshead extension is almost half of the whole length of the whole crosshead, and the crosshead for the pump is classified into a shaft sleeve type part.

With the increase of service life, the wear of the side wall part of the inner cavity of the crosshead is increased continuously, but under the lubricating action of the oil seal, the wear of the stretching area of the crosshead is far less than that of the inner cavity part of the crosshead, once the wear of the crosshead exceeds a certain degree, the crosshead needs to be replaced integrally, and the subsequent maintenance cost is high.

In addition, the plastic forming, i.e., forging, causes the following problems: the inner cavity of the crosshead is difficult to demould, and in addition, an oil passing hole and a pin hole of the inner cavity need to be processed in a later period, so that the utilization rate of materials is reduced, and the working hour of machining is increased; although the liquid forming, i.e. casting method, can avoid a series of problems caused by forging forming, because of the limitation of casting itself, the crystal grains of the casting material are often relatively coarse due to the liquid forming for the crosshead with strict requirement on working conditions, and any casting defects such as insufficient casting, cold shut, slag inclusion, air holes and the like are also not allowed.

The high-power and high-frequency operation of the high-pressure plunger pump enables extremely high design requirements to be invisibly added to the tensile strength and the fatigue strength of a transmission part, so that the crosshead design scheme which can meet the requirements of a material forming process, can meet the requirements of corresponding material strength and can bring economic benefits is designed to solve the problem to be urgently solved in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a pump with split type cross head, this split type cross head later maintenance is with low costs to production packaging efficiency is high.

The utility model discloses a realize through following technical scheme: the utility model provides a split type cross head for pump, stretches and locking part including the cross head main part, the cross head of components of a whole that can function independently, and the inner chamber has been seted up in the left side of cross head main part, and the right side of cross head main part is passed through locking part and is stretched locking connection with the cross head, and cross head main part and cross head stretch all be the cylinder structure to the diameter that the cross head stretched is less than the cross head main part, and the pinhole has been seted up to the.

The crosshead of the utility model comprises a separated crosshead main body, a crosshead extension and a locking part, and in the later-stage actual use process, the abrasion degree of the crosshead extension is far less than that of the crosshead main body, so that a worker can only replace the crosshead main body, the later-stage maintenance cost is reduced, and the cost is reduced; in addition, the crosshead main body and the crosshead extension can be manufactured independently, so that the later-stage treatment on an inner cavity and a pin hole of the crosshead is avoided, and the production efficiency is improved; in addition, the locking component can lock the crosshead body and the crosshead extension in the axial direction, so that the joint of the crosshead body and the crosshead extension is prevented from being broken, and the overall strength of the crosshead can be effectively increased.

According to the technical scheme, preferably, the locking component is a threaded pin, the performance grade of the threaded pin reaches over 12.9 grades, the middle parts of the crosshead main body and the crosshead extension are provided with screw holes matched with the threaded pin, the threaded connection locking effect is stable, and the assembly is efficient.

According to above-mentioned technical scheme, preferably, the right side of cross head main part is equipped with protruding tang, and the cross head stretches to press close to the side with the cross head main part and opens the concave tang that is equipped with protruding tang looks adaptation, through the cooperation of protruding tang with concave tang, can realize tentatively locking cross head main part and cross head and stretch, the staff's of being convenient for installation threaded pin.

According to above-mentioned technical scheme, preferably, protruding tang and concave tang interference fit can prevent effectively that cross head main part and cross head from stretching to take place relative rotation.

According to above-mentioned technical scheme, preferably, the cross head main part adopts the investment casting method to pour the shaping, because the investment casting method can directly cast out to the hole more than diameter 2mm, consequently the inner chamber and the pinhole homoenergetic of cross head cast the shaping integratively, and then avoid current post processing inner chamber and pinhole, not only improve the production efficiency of cross head main part, can promote the utilization ratio of production material moreover greatly.

According to above-mentioned technical scheme, preferably, the cross head stretches to adopt steel bar stock turning machine-shaping, because steel bar stock generally adopts the hot rolling of plastic forming to handle, tensile strength and plasticity are superior to the gained stock of casting shaping greatly, can effectively satisfy the cross head and stretch the use operating mode that bears compressive stress and tensile stress repeatedly, compare the various casting defects that the casting brought simultaneously for the quality of product can promote.

According to the technical scheme, preferably, the concave spigot is the circular clamping groove, the convex spigot is the cylindrical lug matched with the circular clamping groove, the circular clamping groove and the cylindrical lug are high in production efficiency, and the size precision is easy to control.

According to the technical scheme, preferably, the end part of the locking component is provided with the polygonal slot, the polygonal slot can be preferably a hexagonal slot, and a worker can conveniently use the inner hexagonal wrench to lock the locking component.

The utility model has the advantages that: the crosshead of the utility model comprises a separated crosshead main body, a crosshead extension and a locking part, and in the later use process, the abrasion degree of the crosshead extension is far less than that of the crosshead main body, so that a worker can only replace the crosshead main body, the later maintenance cost is reduced, and the cost is reduced; in addition, the crosshead main body and the crosshead extension can be manufactured independently, so that the post-processing of an inner cavity of the crosshead and a pin hole is avoided, and the production efficiency is improved; in addition, the locking component can lock the crosshead body and the crosshead extension in the axial direction, so that the joint of the crosshead body and the crosshead extension is prevented from being broken, and the overall strength of the crosshead can be effectively increased.

Drawings

Fig. 1 shows a schematic perspective view of an assembled structure according to an embodiment of the present invention.

Fig. 2 shows a schematic perspective view of an embodiment of the present invention during separation.

Fig. 3 shows a schematic cross-sectional structure during separation according to an embodiment of the invention.

In the figure: 1. a crosshead body; 2. stretching a crosshead; 3. a locking member; 4. an inner cavity; 5. a pin hole; 6. a male end; 7. a concave spigot; 8. a polygonal slot; 9. and a screw hole.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in the figure, the utility model provides a split type cross head for pump, including the cross head main part 1 of components of a whole that can function independently, the cross head stretches 2 and locking part 3, cross head main part 1 and cross head stretch 2 all are the cylinder structure, and the diameter that the cross head stretches 2 is less than cross head main part 1, in later stage in-service use, the degree of wear that the cross head stretches 2 is far less than cross head main part 1, therefore the staff can only change cross head main part 1, and then reduce the maintenance expense in later stage, realize reducing the cost, the left side of cross head main part 1 is seted up the inner chamber 4 that inserts one end of connecting rod, the right side of cross head main part 1 is connected with cross head stretch 2 locking through locking part 3, locking part 3 is preferred threaded pin, and the performance grade of threaded pin reaches more than 12.9 grades, the middle part of cross head main, the threaded connection locking effect is stable, the assembly is efficient, the threaded pin can lock the crosshead body 1 and the crosshead extension 2 in the axial direction, the fracture at the joint of the crosshead body 1 and the crosshead extension 2 is prevented, further, the overall strength of the crosshead can be effectively increased, pin holes 5 are symmetrically formed in the side wall of an inner cavity 4 of the crosshead body 1, a male spigot 6 is arranged on the right side of the crosshead body 1, a female spigot 7 matched with the male spigot 6 is arranged on the side, close to the crosshead body 1, of the crosshead extension 2, the male spigot 6 is matched with the female spigot 7, preliminary locking of the crosshead body 1 and the crosshead extension 2 can be achieved, a worker can conveniently install the threaded pin, the male spigot 6 is slightly in interference fit with the female spigot 7, relative rotation of the crosshead body 1 and the crosshead extension 2 can be effectively prevented, the female spigot 7 is a circular clamping groove, the male spigot 6 is a cylindrical lug matched with the circular clamping groove, circular draw-in groove and columniform lug processing production efficiency are high, and size precision easily controls moreover.

According to the above embodiment, preferably, crosshead body 1 adopts the investment casting method to pour the shaping, because the investment casting method can directly cast out the hole that diameter 2mm is above, therefore inner chamber 4 and the pinhole 5 homoenergetic of crosshead cast the shaping integratively, and then avoid current post processing inner chamber 4 and pinhole 5, not only improve crosshead body 1's production efficiency, can promote the utilization ratio of production material greatly moreover.

Further, the cross head is stretched 2 and is adopted steel bar stock lathe work shaping, because the steel bar stock generally adopts the hot rolling of plastic forming to handle, tensile strength and plasticity are obviously superior to the gained stock of casting shaping, can effectively satisfy the cross head and stretch 2 use operating mode that bears compressive stress and tensile stress repeatedly, various casting defects that the contrast casting piece brought simultaneously, the quality of product obviously can promote, simultaneously because the cross head stretches 2 and can directly use bar stock lathe work shaping without the die sinking, thereby the input cost of product in the development stage has been reduced.

Furthermore, the end of the threaded pin is provided with a polygonal slot 8, and the polygonal slot 8 can be preferably a hexagonal slot, so that a worker can lock the locking component 3 by using an inner hexagonal wrench conveniently.

The utility model has the advantages that: the crosshead of the utility model comprises a crosshead main body 1, a crosshead extension 2 and a locking part 3 which are separated, and in the later use process, the abrasion degree of the crosshead extension 2 is far less than that of the crosshead main body 1, so that a worker can only replace the crosshead main body 1, the later maintenance cost is reduced, and the cost is reduced; in addition, the crosshead body 1 and the crosshead extension 2 can be manufactured independently, so that the post-processing of an inner cavity of the crosshead and the pin hole 5 is avoided, and the production efficiency is improved; in addition, the locking component 3 can lock the crosshead body 1 and the crosshead extension 2 in the axial direction, so that the joint of the crosshead body 1 and the crosshead extension 2 is prevented from being broken, and the overall strength of the crosshead can be effectively increased.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The utility model provides a split type cross head for pump, its characterized in that, stretches and locking part including cross head main part, the cross head of components of a whole that can function independently, the inner chamber has been seted up in the left side of cross head main part, the right side of cross head main part is passed through locking part and is stretched locking connection with the cross head, the diameter that the cross head stretched is less than the cross head main part, the pinhole has been seted up to the lateral wall symmetry of the inner chamber of cross head main.

2. The split type crosshead for a pump according to claim 1, wherein the locking member is a threaded pin, and screw holes matched with the threaded pin are formed in the crosshead body and the middle of the crosshead extension.

3. The split type crosshead for the pump according to claim 2, wherein a male spigot is arranged on the right side of the crosshead body, and a female spigot matched with the male spigot is arranged on the side, close to the crosshead body, of the crosshead.

4. The split crosshead of claim 3, wherein the male spigot and the female spigot are in an interference fit.

5. The split type crosshead for a pump according to any one of claims 1 to 4, wherein the crosshead body and the crosshead extension are each of a cylindrical structure.

6. The split type crosshead for the pump according to claim 5, wherein the crosshead body is cast by an investment casting method.

7. The split type crosshead for a pump according to claim 6, wherein the crosshead is formed by turning.

8. The split crosshead according to claim 3, wherein the female spigot is a circular slot and the male spigot is a cylindrical projection fitted into the circular slot.

9. The split type crosshead for a pump according to claim 8, wherein an end portion of the locking member is formed with a polygonal slot.

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