CN215979847U

CN215979847U - Piston assembly of slurry pump

Info

Publication number: CN215979847U
Application number: CN202121942755.5U
Authority: CN
Inventors: 王少群; 王亚超
Original assignee: Puyang Yousheng Petroleum Machinery Manufacturing Co ltd
Current assignee: Puyang Yousheng Petroleum Machinery Manufacturing Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-03-08
Anticipated expiration: 2031-08-19

Abstract

The mud pump piston assembly is a kind of oil field mud pump technology, it overcomes the disadvantage of other technologies, it includes piston seat, piston seal block, piston baffle, elasticity keep off ring and seal ring, the said piston seat is fitted with the piston seal block, piston baffle, elasticity keep off ring sequentially, there are seal rings on the centre hole of the piston seat; the significance of the utility model is as follows: the piston adopts a two-layer sealing structure, so that the sealing performance is good; the piston adopts the structure of the piston sealing block and the piston baffle plate, so that the piston has the characteristics of wear resistance, compression resistance, high temperature resistance, low temperature resistance, corrosion resistance, tear resistance and the like; the service life is prolonged; the elastic baffle ring is provided with the opening, so that the elastic baffle ring is convenient to stretch and retract, and the elastic baffle ring can be prevented from being torn.

Description

Piston assembly of slurry pump

Technical Field

The utility model relates to an oil field slurry pump technology, in particular to a slurry pump piston assembly.

Background

The conventional slurry pump is of a piston type or a plunger type, a power machine drives a crankshaft of the pump to rotate, and the crankshaft drives the piston or the plunger to reciprocate in a pump cylinder through a crosshead. The purpose of pressure feeding and flushing liquid circulating is realized under the alternate action of the suction valve and the discharge valve. The mud pump belongs to one type of reciprocating pump, and the action principle of the mud pump is completely the same as that of a common reciprocating pump. When the slurry pump works, the power machine drives the main shaft and the crank fixed on the main shaft to rotate through a belt, a transmission shaft, a gear and other transmission parts. When the crank rotates from the horizontal position to the left and the right in a counterclockwise way, the piston moves to the power end, the pressure in the hydraulic cylinder is gradually reduced and vacuum is formed, and the liquid in the suction pool jacks up the suction valve to enter the hydraulic cylinder under the action of the liquid level pressure until the piston moves to a right dead center. This operation is referred to as the pump intake process. After the crank finishes the above-mentioned suction process, it continues to rotate in the anticlockwise direction, at this time, the piston begins to move to the hydraulic end, the liquid in the hydraulic cylinder is squeezed, the pressure rises, the suction valve closes, the discharge valve is opened, the liquid enters the discharge pipe, until the piston moves to the left dead center. This operation is called a pump discharge operation. The reciprocating pump continuously repeats the processes of sucking and discharging along with the continuous running of the power machine, and the liquid in the sucking pool is continuously sent to the bottom of the well through the discharge pipe. The mud pump has high requirements on the piston and has the characteristics of wear resistance, compression resistance, high temperature and low temperature resistance, corrosion resistance, tear resistance and the like. Most of the existing pistons are close to a leather cup, the leather cup is poor in corrosion resistance, easy to corrode toxic metals such as heat, oxygen and copper, poor in tear resistance and short in service life.

Disclosure of Invention

The utility model aims to provide a piston assembly with better sealing performance and long service life, which overcomes the defects of other technologies and comprises a piston seat, a piston sealing block, a piston baffle plate, an elastic baffle ring and a sealing ring, wherein the piston sealing block, the piston baffle plate and the elastic baffle ring are sequentially arranged on the piston seat, and the sealing ring is arranged on a central hole of the piston seat.

The piston seat is of a hollow structure with the upper end face and the mounting body integrated, the diameter of an inner hole of the piston seat is 42mm, the outer diameter of the upper end face is 170mm, a sealing groove is arranged at the port of the upper end face, and the diameter of the sealing groove is 55 mm; the external diameter of the installation body is 95mm, and the lower extreme of its installation body is provided with the fender annular, and the diameter of its fender annular is 89 mm.

The piston sealing block is arranged on the mounting body of the piston seat by threads, and the inner diameter of the upper opening of the sealing block is 95mm and is larger than the outer diameter of the mounting body below the piston seat; the outer diameter of the upper opening of the piston sealing block is 170mm, and is consistent with the diameter of the upper end face of the piston seat; two inclined steps are arranged at the lower side of the piston sealing block, the inner diameter of the middle inclined step is 101mm, and the inclination of the middle inclined step is 22 degrees; the inner diameter of the lower inclined step is 115mm, and the inclination is 25 degrees.

The piston baffle is installed on the installation body of the piston seat through threads, the piston baffle is a hollow body with a trapezoidal section, the inner diameter of an upper opening of the piston baffle is 95mm and is consistent with the inner diameter of the upper opening of the sealing block, and the height of the inner diameter of the upper opening is 12 mm; the inner diameter of the lower opening of the piston baffle is 146.977mm, the outer diameter of the piston baffle is 166mm, and the inclination of the lower opening and the upper opening is 22 degrees.

The elastic baffle ring is an open hollow ring and is embedded in a baffle ring groove of the mounting body below the piston seat; the inner diameter of the elastic baffle ring is 89mm and is consistent with the diameter of the baffle ring groove; the aperture of the opening of the elastic baffle ring is 4 mm.

The sealing ring is embedded in a sealing groove on the upper end surface of the piston seat; the inner diameter of the sealing ring is 43mm, is larger than the hollow inner diameter of the upper end surface of the piston seat, and is consistent with the inner diameter of the sealing groove of the upper end surface of the piston seat.

The significance of the utility model is as follows: the piston adopts a two-layer sealing structure, so that the sealing performance is good; the piston adopts the structure of the piston sealing block and the piston baffle plate, so that the piston has the characteristics of wear resistance, compression resistance, high temperature resistance, low temperature resistance, corrosion resistance, tear resistance and the like; the service life is prolonged; the elastic baffle ring is provided with the opening, so that the elastic baffle ring is convenient to stretch and retract, and the elastic baffle ring can be prevented from being torn.

Drawings

Fig. 1 is a schematic structural diagram of a mud pump piston assembly, and in the diagram, 1, a piston seat 2, a piston sealing block 3, a piston baffle 4, an elastic baffle ring 5 and a sealing ring are shown.

Fig. 2 is a schematic structural diagram of the piston seat, in which fig. 6, an upper end surface 7, an installation body 8, a sealing groove 9, and a retainer ring groove.

Fig. 3 is a schematic structural diagram of the piston sealing block, in the diagram, 10, a middle inclined step 11 and a lower inclined step.

Fig. 4 is a schematic diagram of the piston baffle, in the figure 12, an upper port 13 and a lower port.

Fig. 5 is a schematic structural view of the snap ring, fig. 4, the snap ring 14, and the opening.

Detailed Description

Embodiment 1, the utility model includes a piston seat 1, a piston sealing block 2, a piston baffle 3, an elastic baffle ring 4 and a sealing ring 5, wherein the piston sealing block 2, the piston baffle 3 and the elastic baffle ring 4 are sequentially installed on the piston seat 1, and the sealing ring 5 is arranged on a central hole of the piston seat 1.

Embodiment 2, the piston seat 1 is a hollow structure with an upper end surface 6 and an installation body 7 integrated, the diameter of an inner hole is 42mm, the outer diameter of the upper end surface 6 is 170mm, a sealing groove 8 is arranged at the port of the upper end surface 6, and the diameter of the sealing groove 8 is 55 mm; the outer diameter of the mounting body 7 is 95mm, the lower end of the mounting body 7 is provided with a baffle ring groove 9, and the diameter of the baffle ring groove 9 is 89 mm.

In embodiment 3, the piston sealing block 2 is installed on the installation body 7 of the piston seat 1 by screw threads, and the inner diameter of the upper opening of the sealing block 2 is 95mm and is larger than the outer diameter of the installation body 7 at the lower side of the piston seat 1; the outer diameter of the upper opening of the piston sealing block 2 is 170mm, and is consistent with the diameter of the upper end surface of the piston seat 1; two inclined steps are arranged at the lower side of the piston sealing block 2, wherein the inner diameter of the middle inclined step 10 is 101mm, and the inclination is 22 degrees; the inner diameter of the lower inclined step 11 is 115mm, and the inclination is 25 degrees.

In embodiment 4, the piston baffle 3 is installed on the installation body 7 of the piston seat 1 by screw threads, the piston baffle 3 is a hollow body with a trapezoidal cross section, the inner diameter of the upper opening 12 of the piston baffle 3 is 95mm and is consistent with the inner diameter of the upper opening of the sealing block 2, and the height of the inner diameter of the upper opening 12 is 12 mm; the inner diameter of the lower opening 13 of the piston baffle 3 is 146.977mm, the outer diameter thereof is 166mm, and the inclination of the lower opening 13 and the upper opening 12 is 22 degrees.

In embodiment 5, the elastic baffle ring 4 is an open hollow ring, and the elastic baffle ring 4 is embedded in a baffle ring groove 9 of the installation body 7 below the piston seat 1; the inner diameter of the elastic baffle ring 4 is 89mm and is consistent with the diameter of the baffle ring groove 9; the aperture of the opening 14 of the elastic baffle ring 4 is 4 mm.

Embodiment 6, the seal ring 5 is embedded in the seal groove 5 on the upper end surface of the piston seat 1; the inner diameter of the sealing ring 5 is 43mm, is larger than the hollow inner diameter of the upper end surface of the piston seat 1, and is consistent with the inner diameter of the sealing groove 5 of the upper end surface of the piston seat 1.

Claims

1. Mud pump piston assembly, it includes piston seat (1), piston seal block (2), piston baffle (3), elasticity keep off ring (4) and sealing washer (5), characterized by: the piston seat (1) is sequentially provided with a piston sealing block (2), a piston baffle (3) and an elastic baffle ring (4), and a sealing ring (5) is arranged on a central hole of the piston seat (1).

2. The mud pump piston assembly as set forth in claim 1, wherein: the piston seat (1) is of a hollow structure with an upper end surface (6) and a mounting body (7) integrated, the diameter of an inner hole of the piston seat is 42mm, the outer diameter of the upper end surface (6) is 170mm, a sealing groove (8) is arranged at the port of the upper end surface (6), and the diameter of the sealing groove (8) is 55 mm; the outer diameter of the mounting body (7) is 95mm, the lower end of the mounting body (7) is provided with a ring blocking groove (9), and the diameter of the ring blocking groove (9) is 89 mm.

3. The mud pump piston assembly as set forth in claim 1, wherein: the piston sealing block (2) is arranged on the mounting body (7) of the piston seat (1) through threads, the inner diameter of the upper opening of the sealing block (2) is 95mm and is larger than the outer diameter of the mounting body (7) on the lower side of the piston seat (1); the outer diameter of the upper opening of the piston sealing block (2) is 170mm, and is consistent with the diameter of the upper end surface of the piston seat (1); two inclined steps are arranged at the lower side of the piston sealing block (2), the inner diameter of the middle inclined step (10) is 101mm, and the inclination is 22 degrees; the inner diameter of the lower inclined step (11) is 115mm, and the inclination is 25 degrees.

4. The mud pump piston assembly as set forth in claim 1, wherein: the piston baffle (3) is installed on the installation body (7) of the piston seat (1) through threads, the piston baffle (3) is a hollow body with a trapezoidal section, the inner diameter of an upper opening (12) of the piston baffle (3) is 95mm and is consistent with the inner diameter of the upper opening of the sealing block (2), and the height of the inner diameter of the upper opening (12) is 12 mm; the inner diameter of the lower opening (13) of the piston baffle plate (3) is 146.977mm, the outer diameter of the piston baffle plate is 166mm, and the inclination between the lower opening (13) and the upper opening (12) is (22).

5. The mud pump piston assembly as set forth in claim 1, wherein: the elastic baffle ring (4) is an open hollow ring, and the elastic baffle ring (4) is embedded in a baffle ring groove (9) of the mounting body (7) below the piston seat (1); the inner diameter of the elastic baffle ring (4) is 89mm and is consistent with the diameter of the baffle ring groove (9); the caliber of the opening (14) of the elastic baffle ring (4) is 4 mm.

6. The mud pump piston assembly as set forth in claim 1, wherein: the sealing ring (5) is embedded in a sealing groove (8) on the upper end surface of the piston seat (1); the inner diameter of the sealing ring (5) is 43mm, is larger than the hollow inner diameter of the upper end surface of the piston seat (1), and is consistent with the inner diameter of the sealing groove (5) of the upper end surface of the piston seat (1).