Slurry pump plunger assembly structure convenient to disassemble and assemble

Abstract

A mud pump plunger assembly structure convenient to disassemble and assemble comprises a pump body, a pull rod, a pump head and a plunger and is characterized by further comprising a connecting assembly, a sealing assembly and a positioning assembly. When quick-wear parts such as the plunger and the sealing assembly are disassembled, the sealing assembly and the plunger can be taken down from a gap between the pull rod and the pump body only by loosening the sealing connecting sleeve, retreating the pull rod by a certain distance, loosening the plunger connecting sleeve on the pull rod and moving towards the pull rod side, and parts in the plunger and the sealing assembly can be easily replaced. And the dismounting operation is simple and labor-saving, the dismounting efficiency can be greatly improved, and the use efficiency of the slurry pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating mud pumps, in particular to a plunger assembly structure of a mud pump which is convenient for disassembly and assembly. Background Technique

[0002] At present, in the geological exploration industry, as the drilling depth continues to increase, the pressure requirements for supporting mud pumps are getting higher and higher, and the commonly used piston pumps cannot meet the requirements. In order to ensure the reliability of the operation of the mud pump, high-pressure mud pumps mostly adopt a plunger structure design, and the plunger and its sealing components are vulnerable parts that are easily consumed, and the convenience of disassembly needs to be considered.

[0003] As Figure 1 shown, the traditional plunger assembly structure is to pass the plunger (4) through the plunger connecting sleeve (5) and the sealing sleeve (8) in sequence, and then install corresponding sealing parts in the gap between the plunger (4) and the sealing sleeve (8) to form a sealing assembly. Then, the plunger (4) and the sealing sleeve (8) with the assembled sealing assembly are inserted into the plunger installation hole of the pump body (1) from the outside of the pump body (1), and then the plunger connecting sleeve (5) is threadedly connected with the pull rod (2), and the sealing sleeve (8) is in a tight fit with the plunger installation hole of the pump body (1) to play a positioning role. Finally, the pump head (3) is installed on the outer end of the pump body (1) of the sealing sleeve (8).

[0004] The disadvantages of this structure are as follows: Each time when replacing the vulnerable parts, it is necessary to disassemble the pump head, multiple connecting bolts for fixing the pump head, and the pipelines connected to the pump head. Since the pump head is relatively heavy, it is time-consuming and laborious to disassemble, and generally it needs to rely on auxiliary lifting equipment to complete; since the sealing sleeve and the plunger installation hole of the pump body are in a tight fit, a special tool is needed to push it out or slowly knock it with a copper bar when disassembling, the disassembly operation is difficult and easy to damage, time-consuming and laborious and the efficiency is extremely low, seriously affecting the use efficiency of the mud pump. Summary of the Invention

[0005] The utility model provides a plunger assembly structure of a mud pump which is convenient for disassembly and assembly aiming at the problems mentioned in the background technique. When disassembling the plunger and the sealing assembly, it is not necessary to disassemble the pump head, and the disassembly operation is simple and labor-saving, which can greatly improve the disassembly efficiency and the use efficiency of the mud pump.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A plunger assembly structure of a mud pump which is convenient for disassembly and assembly, including a pump body, a pull rod, a pump head and a plunger, and is characterized in that it further includes a connection assembly, a sealing assembly and a positioning assembly;

[0008] The described connecting component includes a plunger connecting sleeve, two semi-circular snap rings, and two semi-circular snap positioning sleeves. One end of the inner hole of the plunger connecting sleeve is provided with a ring of inwardly protruding steps, and the inner wall of the other end is provided with an internal thread of a certain length. The end with the steps is sleeved on the pull rod, and the end with the internal thread is threadedly engaged and connected with the outer wall of one end of the plunger. A ring of grooves is provided on the side wall of the plunger connecting end on the pull rod, and the semi-circular snap rings are arranged in the grooves. The two semi-circular snap rings form a complete circular snap ring. The semi-circular snap ring positioning sleeves are respectively covered on the two semi-circular snap rings. The semi-circular snap rings and the semi-circular snap ring positioning sleeves form a ring of protruding bosses at the groove of the outer wall of the pull rod, which cooperate with the steps in the inner hole of the plunger connecting sleeve to prevent the plunger connecting sleeve from disengaging from the pull rod;

[0009] The described sealing component includes a sealing sleeve, a compression plug, a sealing ring, and a guide ring. The plunger passes through the sealing sleeve and is installed in the plunger installation hole of the pump body together with the sealing sleeve. The sealing sleeve is cylindrical, and the inner hole is a stepped hole divided into two levels along the axis. The front aperture of the stepped hole far from the pump body is larger than the rear aperture inserted close to the pump body. The sealing ring and the guide ring are successively arranged from the inside to the outside in the gap between the front end of the inner hole of the sealing sleeve and the plunger, and then are fixed by the compression plug;

[0010] The outer wall of the sealing sleeve is divided into a section A surface and a section B surface according to the outer diameter size. The section far from the pump body is the section A surface, and the section close to the pump body is the section B surface. The outer diameter of the section A surface is larger than the outer diameter of the section B surface. One end of the section B surface is inserted into the plunger installation hole of the pump body and is connected with the plunger installation hole on the pump body in a matching manner. A ring of bosses is provided on the outer wall of the end of the section A surface close to the pump body;

[0011] The described positioning component includes a sealing sleeve positioning disc and a sealing connecting sleeve. The sealing sleeve positioning disc is disc-shaped, and a sealing sleeve positioning hole with the same outer diameter as the sealing sleeve is provided in the middle and is aligned with the plunger installation hole on the pump body. Bolt holes are provided on the skirt around the sealing sleeve positioning hole. The sealing sleeve positioning disc is fixedly connected to the pump body by bolts. A ring of convex edges protruding from the surface of the sealing sleeve positioning disc by a certain height is provided on the end face of the hole opening of the sealing sleeve positioning hole on the side of the sealing sleeve positioning disc close to the pull rod. The outer side surface of the convex edge is provided with threads, and the upper end face of the convex edge abuts against the stepped surface at the junction of the section A surface and the section B surface of the sealing sleeve. One end of the inner hole of the sealing connecting sleeve is provided with a ring of inwardly protruding steps, and the inner wall of the other end is provided with an internal thread of a certain length. The sealing connecting sleeve is sleeved on the bottom of the section A surface of the sealing sleeve and the convex edge of the sealing sleeve positioning disc, and is threadedly engaged with the threads on the convex edge to fixedly connect the sealing sleeve and the sealing sleeve positioning disc. The steps in the inner hole of the sealing connecting sleeve cooperate with the bosses on the section A surface of the sealing sleeve to prevent the sealing sleeve from disengaging from the sealing connecting sleeve.

[0012] A further solution is that a groove is provided on the outer wall of the seal sleeve at the end of the sealed connection sleeve away from the pump head, and a separable and detachable snap ring is provided in the groove. The snap ring forms a step at the groove to block one end of the sealed connection sleeve and prevent the sealed connection sleeve from loosening, thereby increasing stability.

[0013] A further solution is that an annular sealing gasket is provided in the gap between the end face of the seal sleeve close to the pump head and the pump head to increase the sealing performance.

[0014] A further solution is that the pump body and the pump head are fixedly connected through a connecting positioning sleeve.

[0015] The beneficial effect of the present utility model is that when disassembling the vulnerable parts such as the plunger and the seal assembly, as long as the sealed connection sleeve is loosened, then the pull rod is retracted a certain distance, and then the plunger connection sleeve on the pull rod is loosened and moved toward the pull rod side, the seal assembly and the plunger can be removed from the gap between the pull rod and the pump body. Thus, the parts in the plunger and the seal assembly can be easily replaced without disassembling the pump head. The disassembly operation is simple and labor-saving, which can greatly improve the disassembly efficiency and the service efficiency of the mud pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the prior art;

[0017] Figure 2 is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the seal assembly of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Embodiment

[0020] As Figure 2 and Figure 3 shown, a mud pump plunger assembly structure convenient for disassembly and assembly includes a pump body 1, a pull rod 2, a pump head 3, and a plunger 4, and further includes a connection assembly, a seal assembly, and a positioning assembly;

[0021] The described connecting component includes a plunger connecting sleeve 5, two semi-circular snap rings 6, and two semi-circular snap positioning sleeves 7. One end of the inner hole of the plunger connecting sleeve 5 is provided with a ring of inwardly protruding steps 51, and the inner wall of the other end is provided with an internal thread of a certain length. The end with the steps 51 is sleeved on the pull rod 2, and the end with the internal thread is threadedly engaged with the outer wall of one end of the plunger 4. A ring of grooves A21 is provided on the side wall of the plunger connection end on the pull rod 2, and the semi-circular snap rings 6 are arranged in the grooves. The two semi-circular snap rings 6 form a complete circular snap ring. The semi-circular snap ring positioning sleeves 7 are respectively placed on the two semi-circular snap rings 6. The semi-circular snap rings 6 and the semi-circular snap ring positioning sleeves 7 form a ring of protruding bosses at the groove of the outer wall of the pull rod 2, which cooperate with the steps 51 in the inner hole of the plunger connecting sleeve 5 to prevent the plunger connecting sleeve 5 from disengaging from the pull rod 2;

[0022] The described sealing component includes a sealing sleeve 8, a compression plug 9, a sealing ring 10, and a guide ring 11. The plunger 4 passes through the sealing sleeve 8 and is installed together with the sealing sleeve 8 into the plunger installation hole of the pump body 1. The sealing sleeve 8 is cylindrical, and the inner hole is a stepped hole divided into two levels along the axial direction. The front section diameter of the stepped hole far from the pump body 1 is larger than the diameter of the rear section inserted close to the pump body 1. The sealing ring 10 and the guide ring 11 are sequentially arranged from the inside to the outside in the gap between the front section of the inner hole of the sealing sleeve 8 and the plunger 4, and then are fixed by the compression plug 9;

[0023] The outer wall of the sealing sleeve 8 is divided into an A-section surface 81 and a B-section surface 82 according to the outer diameter. The section far from the pump body 1 is the A-section surface 81, and the section close to the pump body 1 is the B-section surface 82. The outer diameter of the A-section surface 81 is larger than the outer diameter of the B-section surface 82. One end of the B-section surface 82 is inserted into the plunger installation hole of the pump body 1 and is engaged with the plunger installation hole on the pump body 1. A ring of bosses 811 is provided on the outer wall of one end of the A-section surface 81 close to the pump body 1;

[0024] The positioning component described above includes a sealing sleeve positioning disc 12 and a sealing connection sleeve 13. The sealing sleeve positioning disc 12 is disc-shaped. There is a sealing sleeve positioning hole in the middle of the sealing sleeve positioning disc 12 that matches the outer diameter of the sealing sleeve 8 and is aligned with the plunger installation hole on the pump body 1. There are bolt holes on the skirt around the sealing sleeve positioning hole. The sealing sleeve positioning disc 12 is fixedly connected to the pump body 1 by bolts. On the end face of the hole opening of the sealing sleeve positioning hole on the side of the sealing sleeve positioning disc 12 close to the pull rod, there is a convex edge 121 that protrudes a certain height from the surface of the sealing sleeve positioning disc 12. The outer side of the convex edge 121 is provided with threads. The upper end face of the convex edge 121 abuts against the step surface at the junction of the A section surface 81 and the B section surface 82. One end of the inner hole of the sealing connection sleeve 13 is provided with a stepped portion that protrudes inward, and the inner wall of the other end is provided with internal threads of a certain length. The sealing connection sleeve 13 is sleeved on the bottom of the A section surface 81 of the sealing sleeve 8 and the convex edge 121 of the sealing sleeve positioning disc 12, and is fixedly connected to the sealing sleeve 8 and the sealing sleeve positioning disc 12 by cooperating with the threads on the convex edge 121. The stepped portion of the inner hole of the sealing connection sleeve 13 cooperates with the convex platform 811 on the A section surface 81 of the sealing sleeve 8 to prevent the sealing sleeve 8 from coming out of the sealing connection sleeve 13.

[0025] On the outer wall of the sealing sleeve 8 at one end of the sealing connection sleeve 13 away from the pump head 3, there is a groove B83. A separable and detachable snap ring 84 is arranged in the groove B83. The snap ring 84 forms a step at the groove B83 to block one end of the sealing connection sleeve 13 and prevent the sealing connection sleeve 13 from loosening and increase stability.

[0026] An annular sealing gasket 14 is arranged in the gap between one end face of the sealing sleeve 8 close to the pump head 3 and the pump head 3 to improve the sealing performance.

[0027] The pump body 1 and the pump head 3 are fixedly connected by a connecting positioning sleeve 15.

Claims

1. A mud pump plunger assembly structure that is convenient for disassembly and assembly, comprising a pump body, a pull rod, a pump head and a plunger, characterized in that It further includes a connecting component, a sealing component and a positioning component; The connecting component includes a plunger connecting sleeve, two semi-circular snap rings and two semi-circular snap positioning sleeves. One end of the inner hole of the plunger connecting sleeve is provided with a circle of inwardly protruding steps, and the inner wall of the other end is provided with an internal thread of a certain length. The end with the steps is sleeved on the pull rod, and the end with the internal thread is threadedly connected with the outer wall of one end of the plunger. A circle of grooves is provided on the side wall of the plunger connecting end on the pull rod, and the semi-circular snap rings are arranged in the grooves. The two semi-circular snap rings form a complete circular snap ring. The semi-circular snap ring positioning sleeves are respectively covered on the two semi-circular snap rings. The semi-circular snap ring and the semi-circular snap ring positioning sleeve form a circle of protruding bosses at the groove of the outer wall of the pull rod, which cooperate with the steps in the inner hole of the plunger connecting sleeve to prevent the plunger connecting sleeve from slipping off the pull rod; The sealing component includes a sealing sleeve, a compression plug, a sealing ring and a guide ring. The plunger passes through the sealing sleeve and is inserted into the plunger installation hole of the pump body together with the sealing sleeve. The sealing sleeve is cylindrical, and the inner hole is a stepped hole divided into two levels along the axis. The front aperture of the stepped hole far from the pump body is larger than the rear aperture inserted close to the pump body. The sealing ring and the guide ring are sequentially arranged from the inside to the outside in the gap between the front end of the inner hole of the sealing sleeve and the plunger, and then are fixed by the compression plug; The outer wall of the sealing sleeve is divided into an A section surface and a B section surface according to the outer diameter size. The section far from the pump body is the A section surface, and the section close to the pump body is the B section surface. The outer diameter of the A section surface is larger than the outer diameter of the B section surface. One end of the B section surface is inserted into the plunger installation hole of the pump body and is connected with the plunger installation hole on the pump body. A circle of bosses is provided on the outer wall of the end of the A section surface close to the pump body; The positioning component includes a sealing sleeve positioning disc and a sealing connecting sleeve. The sealing sleeve positioning disc is disc-shaped, and is provided with a sealing sleeve positioning hole with the same outer diameter as the sealing sleeve in the middle and is aligned with the plunger installation hole on the pump body. Bolt holes are provided on the skirt around the sealing sleeve positioning hole, and the sealing sleeve positioning disc is fixedly connected with the pump body by bolts. A circle of convex edges protruding a certain height from the surface of the sealing sleeve positioning disc is provided on the orifice end face of the sealing sleeve positioning hole on the side close to the pull rod. The outer side surface of the convex edge is provided with threads. The upper end face of the convex edge abuts against the step surface at the junction of the A section surface and the B section surface of the sealing sleeve. One end of the inner hole of the sealing connecting sleeve is provided with a circle of inwardly protruding steps, and the inner wall of the other end is provided with an internal thread of a certain length. The sealing connecting sleeve is sleeved on the bottom of the A section surface of the sealing sleeve and the convex edge of the sealing sleeve positioning disc, and is threadedly connected with the threads on the convex edge to fix the sealing sleeve and the sealing sleeve positioning disc. The steps in the inner hole of the sealing connecting sleeve cooperate with the bosses on the A section surface of the sealing sleeve to prevent the sealing sleeve from slipping out of the sealing connecting sleeve.

2. The assembly structure of the mud pump plunger that is convenient for disassembly and assembly according to claim 1 is characterized in that A groove is provided on the outer wall of the sealing sleeve at the end of the sealing connecting sleeve far from the pump head, and a detachable snap ring is arranged in the groove. The snap ring forms a step at the groove to block one end of the sealing connecting sleeve and prevent the sealing connecting sleeve from loosening and increase stability.

3. The assembled structure of a mud pump plunger which is convenient for disassembly and assembly according to claim 1 or 2, characterized in that An annular sealing gasket is provided in the gap between the end face of the sealing sleeve close to the pump head and the pump head to improve the sealing performance.

4. A mud pump plunger assembly structure that is easy to disassemble and assemble as described in claim 1 or 2, characterized in that The pump body and the pump head are fixedly connected by a connecting positioning sleeve.

5. The assembly structure of a mud pump plunger that is convenient for disassembly and assembly according to claim 3, characterized in that The pump body and the pump head are fixedly connected by a connecting positioning sleeve.

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