CN216894869U - Plunger pump connecting rod - Google Patents
Plunger pump connecting rod Download PDFInfo
- Publication number
- CN216894869U CN216894869U CN202220239184.7U CN202220239184U CN216894869U CN 216894869 U CN216894869 U CN 216894869U CN 202220239184 U CN202220239184 U CN 202220239184U CN 216894869 U CN216894869 U CN 216894869U
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- connecting rod
- plunger pump
- sliding shaft
- flange
- left end
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Abstract
A connecting rod of a plunger pump comprises a connecting rod and a flange, wherein a step hole is formed in the center of the flange, and connecting holes are uniformly distributed in the flange along the circumferential direction; the connecting rod is composed of a positioning shaft at the left end and a sliding shaft at the right end, the right end of the sliding shaft is provided with an annular clamping groove, the left end of the sliding shaft is provided with an annular retaining shoulder, and the positioning shaft, the sliding shaft, the annular clamping groove and the annular retaining shoulder are coaxially arranged; the flange is sleeved at the left end of the sliding shaft through the step hole, and the annular retaining shoulder is clamped into the left end of the step hole. On the premise of meeting the use requirement, the plunger pump connecting rod adopts a split structure, so that the production cost is reduced, and the connecting rod is made of a 38CrMoALA material and is subjected to nitriding treatment integrally, so that the surface hardness of the connecting rod is higher, and the service life of the plunger pump connecting rod is prolonged.
Description
Technical Field
The utility model relates to the technical field of plunger pumps, in particular to a connecting rod of a plunger pump.
Background
The plunger pump is mainly used in oil fields, the connecting rod is an important component of the plunger pump, the existing connecting rod is of an integrated structure and is made of corrosion-resistant stainless steel (3Cr13), the surface hardness of the connecting rod reaches HRC 50-55 after quenching treatment, the production cost is high, and the service life is short.
SUMMERY OF THE UTILITY MODEL
The utility model provides a plunger pump connecting rod, which overcomes the defects of the prior art.
The technical scheme adopted by the utility model is as follows: a plunger pump connecting rod comprises a connecting rod and a flange, wherein a step hole is formed in the center of the flange, and connecting holes are uniformly distributed in the flange along the circumferential direction; the connecting rod is composed of a positioning shaft at the left end and a sliding shaft at the right end, the right end of the sliding shaft is provided with an annular clamping groove, the left end of the sliding shaft is provided with an annular retaining shoulder, and the positioning shaft, the sliding shaft, the annular clamping groove and the annular retaining shoulder are coaxially arranged; the flange is sleeved at the left end of the sliding shaft through the step hole, and the annular retaining shoulder is clamped into the left end of the step hole.
The groove wall on the right side of the ring-shaped clamping groove is an outward convex inclined surface, and the outward convex inclined surface and the groove bottom of the ring-shaped clamping groove form an included angle of 75 degrees.
The right end of the sliding shaft is necked down through a 15-degree chamfer, and the annular clamping groove is located on the necked-down part.
The connecting rod is a high-grade nitrided steel connecting rod, and the surface of the connecting rod is provided with a nitrided layer with the thickness of 0.6-0.8 mm and the surface hardness of HRC 65-68.
Compared with the prior art, the plunger pump connecting rod has the advantages that on the premise of meeting the use requirements, the plunger pump connecting rod is of a split structure, the production cost is reduced, the connecting rod is made of a 38CrMoALA material and is subjected to nitriding treatment integrally, the surface hardness of the connecting rod is higher, and the service life of the plunger pump connecting rod is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a linkage arrangement of the present invention;
FIG. 3 is a schematic view of the flange configuration of the present invention;
FIG. 4 is a state diagram of the present invention in use;
fig. 5 is a partially enlarged view of a portion a in fig. 4.
Detailed Description
The present invention will be described in detail with reference to the accompanying fig. 1 to 5 and the embodiments.
A connecting rod of a plunger pump comprises a connecting rod 1 and a flange 2, wherein a step hole 2-1 is formed in the center of the flange 2, and four connecting holes 2-2 are uniformly distributed in the flange 2 along the circumferential direction; the connecting rod 1 is composed of a positioning shaft 1-1 at the left end and a sliding shaft 1-2 at the right end, the right end of the sliding shaft 1-2 is provided with an annular clamping groove 1-3, the left end of the sliding shaft 1-2 is provided with an annular retaining shoulder 1-4, and the positioning shaft 1-1, the sliding shaft 1-2, the annular clamping groove 1-3 and the annular retaining shoulder 1-4 are coaxially arranged; the flange 2 is sleeved at the left end of the sliding shaft 1-2 through the step hole 2-1, and the annular retaining shoulder 1-4 is clamped at the left end of the step hole 2-1.
The right groove wall of the annular clamping groove 1-3 is an outward convex inclined surface 1-5, and an included angle of 75 degrees is formed between the outward convex inclined surface 1-5 and the groove bottom of the annular clamping groove 1-3. When the plunger pump is installed, the clamping sleeve component 4 of the plunger pump is clamped in the annular clamping groove 1-3, and the inner inclined surface 4-1 on the clamping sleeve component 4 is clamped in along the outer inclined surface 1-5, so that the right end face of the connecting rod 1 is ensured to be tightly attached to the left end face of the plunger rod 5 of the plunger pump, and the connecting rod 1 is fixedly connected with the plunger rod 5.
The right end of the sliding shaft 1-2 is necked down through a 15-degree chamfer, and the annular clamping groove 1-3 is positioned on the necked-down part. The installation of sealing washer 6 when convenient to use to can prevent the damage when the installation of sealing washer 6, guarantee the leakproofness after the installation.
The connecting rod 1 is a high-grade nitrided steel connecting rod, and the surface of the connecting rod is provided with a nitrided layer with the thickness of 0.6-0.8 mm and the surface hardness of HRC 65-68. The connecting rod 1 is made of 38CrMoALA advanced nitriding steel, and is subjected to nitriding treatment integrally, so that the thickness of a surface nitriding layer reaches 0.6-0.8 mm, and the surface hardness reaches HRC 65-68; the flange 2 is made of No. 45 steel.
During installation, the positioning shaft 1-1 is inserted into an installation hole at the right end of the plunger pump crosshead 3, the left end face of the annular retaining shoulder 1-4 is abutted against the right end face of the plunger pump crosshead 3, the flange 2 is sleeved at the left end of the sliding shaft 1-2 through the stepped hole 2-1, the annular retaining shoulder 1-4 is clamped at the left end of the stepped hole 2-1, the stepped surface in the stepped hole 2-1 is abutted against the right end face of the annular retaining shoulder 1-4, four bolts respectively penetrate through the four connecting holes 2-2 to be in threaded connection with the plunger pump crosshead 3, and the left end of the connecting rod 1 is fixedly connected with the plunger pump crosshead 3; then the plunger pump ferrule assembly 4 is clamped in the annular clamping groove 1-3, and the inner inclined surface 4-1 on the ferrule assembly 4 is clamped along the outer inclined surface 1-5, so that the right end face of the connecting rod 1 is ensured to be tightly attached to the left end face of the plunger pump plunger rod 5, and the right end of the connecting rod 1 is fixedly connected with the plunger pump plunger rod 5.
Taking 3ZS-25/25 plunger pump as an example, compared with the prior art, the utility model saves 90 yuan of production cost of each connecting rod, can save 270 yuan because each plunger pump uses three connecting rods, reduces the production cost, and improves HRC5-10 and the service life of the connecting rods compared with the prior art, thereby prolonging the service life of the plunger pump.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the scope of the utility model, and therefore all equivalent variations made by the following claims should be included in the scope of the utility model.
Claims (4)
1. A plunger pump connecting rod which characterized in that: the connecting rod comprises a connecting rod (1) and a flange (2), wherein a step hole (2-1) is formed in the center of the flange (2), and the connecting holes (2-2) are uniformly distributed in the flange (2) along the circumferential direction; the connecting rod (1) is composed of a positioning shaft (1-1) at the left end and a sliding shaft (1-2) at the right end, an annular clamping groove (1-3) is formed in the right end of the sliding shaft (1-2), an annular retaining shoulder (1-4) is formed in the left end of the sliding shaft (1-2), and the positioning shaft (1-1), the sliding shaft (1-2), the annular clamping groove (1-3) and the annular retaining shoulder (1-4) are coaxially arranged; the flange (2) is sleeved at the left end of the sliding shaft (1-2) through the step hole (2-1), and the annular retaining shoulder (1-4) is clamped into the left end of the step hole (2-1).
2. A plunger pump connecting rod according to claim 1, characterized in that: the groove wall on the right side of the ring-shaped clamping groove (1-3) is an outward convex inclined surface (1-5), and an included angle of 75 degrees is formed between the outward convex inclined surface (1-5) and the groove bottom of the ring-shaped clamping groove (1-3).
3. A plunger pump connecting rod according to claim 1 or 2, characterized in that: the right end of the sliding shaft (1-2) is necked down through a 15-degree chamfer, and the annular clamping groove (1-3) is located on the necked-down part.
4. A plunger pump connecting rod according to claim 3, characterized in that: the connecting rod (1) is a high-grade nitrided steel connecting rod, and the surface of the connecting rod is provided with a nitrided layer with the thickness of 0.6-0.8 mm and the surface hardness of HRC 65-68.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220239184.7U CN216894869U (en) | 2022-01-28 | 2022-01-28 | Plunger pump connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220239184.7U CN216894869U (en) | 2022-01-28 | 2022-01-28 | Plunger pump connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216894869U true CN216894869U (en) | 2022-07-05 |
Family
ID=82182930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220239184.7U Active CN216894869U (en) | 2022-01-28 | 2022-01-28 | Plunger pump connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216894869U (en) |
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2022
- 2022-01-28 CN CN202220239184.7U patent/CN216894869U/en active Active
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