CN212525712U - Steel bushing self-tightening device for high-pressure plunger pump - Google Patents
Steel bushing self-tightening device for high-pressure plunger pump Download PDFInfo
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- CN212525712U CN212525712U CN202021216671.9U CN202021216671U CN212525712U CN 212525712 U CN212525712 U CN 212525712U CN 202021216671 U CN202021216671 U CN 202021216671U CN 212525712 U CN212525712 U CN 212525712U
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Abstract
The utility model provides a steel bushing self-tightening device for a high-pressure plunger pump, which comprises a frame and a punch assembly; the hydraulic cylinder is detachably arranged at the top of the rack, and the guide connecting frame is slidably arranged in the rack; the two opposite sides of the guide connecting frame are respectively and fixedly provided with the punch assembly and a piston rod in the hydraulic cylinder; a steel sleeve fixing plate is arranged at the bottom of the frame, and a high-pressure steel sleeve is detachably arranged on the steel sleeve fixing plate; and a self-tightening punch in the punch assembly is movably inserted into the inner hole of the high-pressure steel sleeve. The application provides a steel bushing self-tightening device for high pressure plunger pump is exclusively used in high pressure plunger pump's machinery self-tightening, and its characteristics to the high pressure steel bushing design, when carrying out the self-tightening to high pressure steel bushing inner wall, can produce certain plastic deformation, and generate the residual stress opposite with the operating stress, reduce the operating stress amplitude, improve its life.
Description
Technical Field
The utility model relates to the technical field of machinery, especially, relate to steel bushing self-tightening device for high pressure plunger pump.
Background
The high-pressure plunger pump is a positive displacement pump with the pressure of 10-160MPa generally, and can achieve the purpose of conveying liquid by means of the periodic volume change in a high-pressure steel sleeve. In the use process of the high-pressure plunger pump, the high-pressure steel sleeve is constantly under the action of reciprocating high and low pressure stress, so that the strength and the service life of the high-pressure steel sleeve are important factors for ensuring the quality of the high-pressure plunger pump.
In order to prolong the service life of the high-pressure steel sleeve, the inner wall of the high-pressure steel sleeve needs to be subjected to self-tightening treatment, so that certain plastic deformation is generated, and residual stress is generated. The barrel components are typically autofretched by hydraulic autofrettage, such as autofrettage of the barrel of a firearm. The hydraulic self-tightening has high sealing requirements, the high-pressure steel sleeve is not provided with a non-closed element, and the high-pressure steel sleeve is difficult to seal, so that the hydraulic self-tightening method is difficult to self-tighten the high-pressure steel sleeve. In addition, the inner hole of the high-pressure steel sleeve is a stepped hole, and the self-tightening treatment is not performed on all the inner walls, so that the hydraulic self-tightening treatment is difficult to perform on part of the inner walls of the high-pressure steel sleeve.
SUMMERY OF THE UTILITY MODEL
The utility model provides a steel bushing self-tightening device for high pressure plunger pump to solve the problem that current hydraulic pressure self-tightening method is difficult to carry out the self-tightening to the high pressure steel bushing.
The utility model provides a steel bushing self-tightening device for a high-pressure plunger pump, which comprises a frame and a punch assembly;
the hydraulic cylinder is detachably arranged at the top of the rack, and the guide connecting frame is slidably arranged in the rack;
the two opposite sides of the guide connecting frame are respectively and fixedly provided with the punch assembly and a piston rod in the hydraulic cylinder;
a steel sleeve fixing plate is arranged below the inside of the frame, and a high-pressure steel sleeve is detachably arranged on the steel sleeve fixing plate;
and a self-tightening punch in the punch assembly is movably inserted into the inner hole of the high-pressure steel sleeve.
Preferably, the punch assembly comprises a punch fixing plate detachably arranged on the guide connecting frame, a punch connecting piece detachably arranged on the punch fixing plate and the self-tightening punch;
the self-tightening punch comprises a punch guide end, a punch connecting end and a punch extruding and expanding end which are sequentially connected;
the punch guide end is movably clamped inside the punch fixing plate and the punch connecting piece;
and the extruding and expanding end of the punch is movably inserted into the inner hole of the high-pressure steel sleeve.
Preferably, a buffer groove is formed in the punch fixing plate, a through groove is formed in the punch connecting piece, and the punch guide end is movably arranged in the buffer groove and the through groove.
Preferably, gaps are reserved between the buffer groove and the through groove and between the buffer groove and the punch guide end.
Preferably, the end surface of the punch guide end facing the punch fixing plate is a cambered surface.
Preferably, the end face of the punch, which faces the steel sleeve fixing plate, is of a double-cone-column structure.
Preferably, the frame comprises a cross beam frame and four upright frames, and the cross beam frame is arranged at the tops of the four upright frames;
a cylinder body in the hydraulic cylinder is fixedly arranged on the cross beam frame;
the guide connecting frames are arranged on the four upright post frames in a sliding mode.
Preferably, a sliding groove is formed in the stand column frame, a rack guide column is arranged on the guide connecting frame, and the rack guide column slides in the sliding groove.
Preferably, the bottom of the frame is provided with a supporting table, and the supporting table is detachably provided with the steel sleeve fixing plate.
The embodiment of the utility model provides a technical scheme can include following beneficial effect:
the utility model provides a steel bushing self-tightening device for a high-pressure plunger pump, which comprises a frame and a punch assembly; the hydraulic cylinder is detachably arranged at the top of the rack, and the guide connecting frame is slidably arranged in the rack; the two opposite sides of the guide connecting frame are respectively and fixedly provided with the punch assembly and a piston rod in the hydraulic cylinder; a steel sleeve fixing plate is arranged below the inside of the frame, and a high-pressure steel sleeve is detachably arranged on the steel sleeve fixing plate; and a self-tightening punch in the punch assembly is movably inserted into the inner hole of the high-pressure steel sleeve. The application provides a steel bushing self-tightening device for high pressure plunger pump is exclusively used in high pressure plunger pump's machinery self-tightening, and its characteristics to the high pressure steel bushing design, when carrying out the self-tightening to high pressure steel bushing inner wall, can produce certain plastic deformation, and generate the residual stress opposite with the operating stress, reduce the operating stress amplitude, improve its life.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a three-dimensional structure diagram of a steel bushing self-tightening device for a high-pressure plunger pump provided in an embodiment of the present invention;
fig. 2 is a cross-sectional view of a steel bushing self-tightening device for a high-pressure plunger pump according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a punch assembly according to an embodiment of the present invention;
the symbols represent:
1-a frame, 2-a punch assembly, 3-a hydraulic cylinder, 4-a guide connecting frame, 5-a steel sleeve fixing plate, 6-a high-pressure steel sleeve, 7-a buffer groove, 8-a through groove, 9-a supporting table and 10-the ground;
101-a beam frame, 102-a column frame, 103-a chute and 104-a rack guide column;
201-punch fixing plate, 202-punch connecting piece, 203-self-tightening punch;
301-cylinder, 302-piston rod;
2031-punch guide end, 2032-punch connection end, 2033-punch extrusion end.
Detailed Description
Referring to fig. 1, fig. 1 is a perspective view illustrating a steel bushing auto-fastening device for a high-pressure plunger pump according to an embodiment of the present disclosure. As shown in fig. 1, the steel bushing self-tightening device for the high-pressure plunger pump provided by the embodiment of the application comprises a frame 1 and a punch assembly 2. The hydraulic cylinder 3 is detachably arranged at the top of the frame 1, the guide connecting frame 4 is slidably arranged inside the frame 1, and the steel sleeve fixing plate 5 is arranged below the inside of the frame 1. The two opposite sides of the guide connecting frame 4 are respectively fixedly provided with a punch component 2 and a piston rod 302 in the hydraulic cylinder 3, a high-pressure steel sleeve 6 is detachably arranged on the steel sleeve fixing plate 5, and a self-tightening punch 203 in the punch component 2 is movably inserted into an inner hole of the high-pressure steel sleeve 6.
Specifically, the frame 1 is used for erecting a punch assembly 2 and a hydraulic cylinder 3. The frame 1 in the embodiment of the present application includes a cross frame 101 and four column frames 102, and the cross frame 101 is disposed on top of the four column frames 102, whereby the frame 1 forms one frame-shaped structure. The guide link frames 4 are slidably disposed on the four column frames 102, and the guide link frames 4 are slidable with respect to the column frames 102. Further, in order to facilitate the vertical sliding of the guide link 4 on the column frames 102, the four column frames 102 are provided with sliding grooves 103, and the guide link 4 is provided with frame guide posts 104, wherein the frame guide posts 104 can slide in the sliding grooves 103, as shown in fig. 2. Further, four column frames 102 are fixedly installed on the ground 10 by bolts.
The bottom of frame 1 still is equipped with a supporting bench 9, can dismantle on this supporting bench 9 and be equipped with steel bushing fixed plate 5. Can dismantle through steel bushing fixed plate 5 and set up high pressure steel bushing 6, and then be convenient for to high pressure steel bushing 6's fixed. Preferably, the steel jacket fixing plate 5 and the supporting platform 9 are detachably connected through bolts.
The hydraulic cylinder 3 is a component for providing thrust and pulling force, and includes a cylinder body 301 and a piston rod 302, and an oil inlet and an oil outlet are provided on the cylinder body 301, so that hydraulic oil can enter and exit the hydraulic cylinder 3 through the oil inlet and the oil outlet, and thrust and pulling force can be provided. The cylinder 301 is fixedly provided to the cross frame 101, and the end of the piston rod 302 is fixedly provided to the guide link 4. The piston rod 302 of the hydraulic cylinder 3 is vertically moved relative to the cross frame 101 by the hydraulic oil. When the piston rod 302 moves up and down with respect to the cross frame 101, the guide link 4 is fixed to the end of the piston rod 302 and the frame guide 104, and the frame guide 104 slides with respect to the slide groove 103, so that the guide link 4 can slide up and down on the four column frames 102.
The punch assembly 2 is a member for performing a self-tightening process of the high-pressure steel sleeve 6. Referring to fig. 3, fig. 3 shows a schematic structural diagram of a punch assembly 2 provided in the embodiment of the present application. As seen in fig. 3, the punch assembly 2 in the embodiment of the present application includes a punch retaining plate 201, a punch coupling member 202, and a clinch punch 203. Specifically, the punch fixing plate 201 is detachably provided on the guide link 4 by bolts or the like, the punch connecting member 202 is detachably provided on the punch fixing plate 201 by bolts or the like, and the clinch punch 203 is movably provided inside the punch connecting member 202. Since the punch fixing plate 201 is provided on the guide link frame 4 and the guide link frame 4 slides up and down with respect to the four column frames 102, the punch assembly 2 can also slide up and down with respect to the frame 1.
The self-tightening punch 203 in the embodiment of the present application is in a double-cone structure, and includes a punch guide end 2031, a punch connection end 2032, and a punch squeezing end 2033, which are connected in sequence. The punch guide end 2031 is movably clamped inside the punch fixing plate 201 and the punch connecting piece 202, and is used for realizing connection between the punch guide end 2031 and the punch fixing plate 201. The punch connecting end 2032 is used for connecting the punch guide end 2031 and the punch expanding end 2033 and is also used for extruding the inner hole of the high-pressure steel sleeve 6. In this embodiment, the diameter of the cylindrical section of the plunger tip extruding end 2033 is larger than the diameter of the inner hole of the high pressure steel bushing 6, so as to extrude the inner hole of the high pressure steel bushing 6. The punch squeezing end 2033 is located at the end of the self-tightening punch 203, the tapered end face of the punch squeezing end 2033 plays a role in transition and guiding, and can be conveniently and movably inserted into the inner hole of the high-pressure steel bushing 6, and then the inner hole of the high-pressure steel bushing 6 is squeezed through the punch squeezing end 2033, so that self-tightening is realized. Preferably, punch guide end 2031, punch coupling end 2032 and punch flaring end 2033 are integrally formed.
In order to facilitate the punch guiding end 2031 to be arranged inside the punch fixing plate 201 and the punch connecting member 202, a buffer groove 7 is arranged on the punch fixing plate 201 in the embodiment of the present application, a through groove 8 is arranged on the punch connecting member 202, and the punch guiding end 2031 is movably arranged in the buffer groove 7 and the through groove 8.
Further, the joints of the clinch punch 203, the punch fixing plate 201 and the punch connecting member 202 in the embodiment of the present application are set to be in a floating form, that is, gaps are left between the buffer groove 7 and the through groove 8 and the punch guide end 2031. Therefore, the self-tightening punch 203 can move a little left and right in the process of extruding the high-pressure steel sleeve 6, and automatically adapts to the fixed position of the high-pressure steel sleeve 6.
Further, the end surface of the punch guide end 2031 facing the punch fixing plate 201 is an arc surface, and the punch guide end 2031 has a certain degree of freedom. When a slight axial deviation occurs between the high-pressure steel sleeve 6 and the clinch punch 203, the punch guide end 2031 of the arc surface can automatically adjust the position of the clinch punch 203 so that the high-pressure steel sleeve 6 overlaps the axis of the clinch punch 203. The requirement of the guide precision when the self-tightening punch 203 enters the high-pressure steel sleeve 6 can be reduced, the self-tightening punch 203 is prevented from being clamped in the high-pressure steel sleeve 6 or the punch connecting end 2032 is prevented from being broken, and the flexibility is improved.
In addition, the length of the cylindrical section of the punch squeezing end 2033 cannot be too long, so that the friction force when the self-tightening punch 203 enters the high-pressure steel sleeve 6 is reduced, a large pushing force is avoided, and the energy loss of the hydraulic cylinder 3 is reduced. The end face of the punch squeezing end 2033 is of a double-cone-column structure, wherein the end face facing the steel sleeve fixing plate 5 can enable the punch to enter the inner hole of the high-pressure steel sleeve 6 in a transition manner, so that the high-pressure steel sleeve 6 is prevented from bearing overlarge interference expanding amount instantly; the end face facing the punch connecting end 2032 can be used for transitionally removing interference when the inner wall of the high-pressure steel sleeve 6 is squeezed and expanded.
The application embodiment provides a steel bushing self-tightening device's for high pressure plunger pump working process does: when the piston rod 302 in the hydraulic cylinder 3 slides downward, the guide link 4 also moves downward, and the self-tightening punch 203 is driven to move downward. Because the high-pressure steel bushing 6 is fixedly arranged on the steel bushing fixing plate 5, the punch extruding and expanding end 2033 in the self-tightening punch 203 which moves downwards can be extruded into the inner hole of the high-pressure steel bushing 6, and the inner wall of the high-pressure steel bushing 6 is extruded by a certain interference, so that the inner wall of the high-pressure steel bushing 6 generates plastic deformation, and residual stress opposite to working stress is generated. When the punch squeezing end 2033 of the self-tightening punch 203 reaches the position where the bore diameter of the inner bore of the high-pressure steel sleeve 6 becomes smaller, the piston rod 302 in the hydraulic cylinder 3 stops moving downwards and moves upwards in the opposite direction, so that the self-tightening punch 203 can be driven to be pulled out of the high-pressure steel sleeve 6, and the self-tightening process of the high-pressure steel sleeve 6 is completed. When the punch squeezing end 2033 of the self-tightening punch 203 reaches the position where the bore diameter of the inner bore of the high-pressure steel sleeve 6 becomes small, the inner wall of the high-pressure steel sleeve 6 generates residual compressive stress to counteract pulsating pressure borne by the high-pressure steel sleeve 6 during working in the high-pressure plunger pump, reduce the working stress amplitude, and improve the fatigue life of the high-pressure steel sleeve 6.
The steel bushing self-tightening device for the high-pressure plunger pump is specially used for mechanical self-tightening of the high-pressure plunger pump, is designed aiming at the characteristics of the high-pressure steel bushing 6, can generate certain plastic deformation when self-tightening treatment is carried out on the inner wall of the high-pressure steel bushing 6, generates residual stress opposite to working stress, reduces the working stress amplitude, and prolongs the service life of the residual stress amplitude.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The present invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (9)
1. A steel bushing self-tightening device for a high-pressure plunger pump is characterized by comprising a frame (1) and a punch assembly (2);
the hydraulic cylinder (3) is detachably arranged at the top of the rack (1), and the guide connecting frame (4) is slidably arranged in the rack (1);
the two opposite sides of the guide connecting frame (4) are respectively fixedly provided with the punch assembly (2) and a piston rod (302) in the hydraulic cylinder (3);
a steel sleeve fixing plate (5) is arranged below the inside of the frame (1), and a high-pressure steel sleeve (6) is detachably arranged on the steel sleeve fixing plate (5);
and a self-tightening punch (203) in the punch assembly (2) is movably inserted into an inner hole of the high-pressure steel sleeve (6).
2. The steel bushing auto-tighting device for the high-pressure plunger pump according to claim 1, wherein the punch assembly (2) comprises a punch fixing plate (201) detachably disposed on the guide connection frame (4), a punch connection member (202) detachably disposed on the punch fixing plate (201), and the auto-tighting punch (203);
the self-tightening punch (203) comprises a punch guide end (2031), a punch connecting end (2032) and a punch squeezing and expanding end (2033) which are connected in sequence;
the punch guide end (2031) is movably clamped in the punch fixing plate (201) and the punch connecting piece (202);
the punch head squeezing and expanding end (2033) is movably inserted into the inner hole of the high-pressure steel sleeve (6).
3. The steel bushing auto-tighting device for the high-pressure plunger pump according to claim 2, wherein a buffer groove (7) is arranged on the punch fixing plate (201), a through groove (8) is arranged on the punch connecting piece (202), and the punch guide end (2031) is movably arranged in the buffer groove (7) and the through groove (8).
4. The steel bushing auto-tighting device for the high-pressure plunger pump according to claim 3, wherein a clearance is left between the buffer groove (7), the through groove (8) and the punch guide end (2031).
5. The steel sleeve auto-tighting device for the high-pressure plunger pump according to claim 2, wherein the end surface of the punch guide end (2031) facing the punch fixing plate (201) is a cambered surface.
6. The steel bushing auto-tighting device for the high-pressure plunger pump according to claim 2, wherein the end surface of the punch head squeezing end (2033) facing the steel bushing fixing plate (5) is of a double-cone structure.
7. The steel sleeve auto-tighting device for a high-pressure plunger pump according to claim 1, wherein the frame (1) comprises a cross-beam frame (101) and four column frames (102), the cross-beam frame (101) being disposed on top of the four column frames (102);
a cylinder body (301) in the hydraulic cylinder (3) is fixedly arranged on the cross beam frame (101);
the guide connecting frame (4) is arranged on the four upright post frames (102) in a sliding mode.
8. The steel sleeve self-tightening device for the high-pressure plunger pump as claimed in claim 7, wherein a sliding groove (103) is formed in the upright post frame (102), a frame guide post (104) is formed in the guide connecting frame (4), and the frame guide post (104) slides in the sliding groove (103).
9. The steel bushing self-tightening device for the high-pressure plunger pump according to any one of claims 1 to 8, characterized in that a support table (9) is arranged at the bottom of the frame (1), and the steel bushing fixing plate (5) is detachably arranged on the support table (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021216671.9U CN212525712U (en) | 2020-06-28 | 2020-06-28 | Steel bushing self-tightening device for high-pressure plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021216671.9U CN212525712U (en) | 2020-06-28 | 2020-06-28 | Steel bushing self-tightening device for high-pressure plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212525712U true CN212525712U (en) | 2021-02-12 |
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ID=74545727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021216671.9U Active CN212525712U (en) | 2020-06-28 | 2020-06-28 | Steel bushing self-tightening device for high-pressure plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212525712U (en) |
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2020
- 2020-06-28 CN CN202021216671.9U patent/CN212525712U/en active Active
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