Fracturing plunger pump for oil field

Abstract

The invention provides a fracturing plunger pump for an oil field. The fracturing plunger pump comprises a shell. The oil suction cavity is arranged at one end of the shell, one end of the oil suction cavity is an oil inlet, and the other end of the oil suction cavity is an oil outlet; the sliding cavity is formed in the middle position of the shell; the power cavity is formed in the shell, and the power cavity and the oil suction cavity are connected through a sliding cavity; the sliding block is arranged in the sliding cavity, a push rod and a shaft head are arranged on the sliding block, the shaft head is connected with a swing arm, the other end of the swing arm is connected with a rotating wheel, and the other end of the swing arm is connected to the edge of the rotating wheel to form eccentricity; the oil inlet and outlet device has the advantages that oil inlet and oil outlet can be achieved, the working efficiency is high, and the sealing effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of fracturing plunger pumps, and in particular to a fracturing plunger pump used in oil fields. Background Art

[0002] The working principle of the fracturing plunger pump is to rely on the reciprocating motion of the plunger in the cylinder body to change the volume of the sealed working chamber to achieve oil suction and oil pressure; the structure of the existing fracturing plunger pump group is such as the "coal mine underground fracturing plunger pump group" disclosed in Chinese patent CN201461291U, which includes a power skid and a plunger pump skid detachably connected to the power skid through a bolt connection structure, an explosion-proof motor is provided on the power skid, and the front end of the power output shaft of the explosion-proof motor is transmission-connected to the input end of the gearbox through a clutch, a three-cylinder horizontal plunger pump is provided on the plunger pump skid, and the input shaft of the three-cylinder horizontal plunger pump is transmission-connected to the output end of the reducer, and the output end of the gearbox is transmission-connected to the input end of the reducer through a universal transmission shaft, and the gearbox, the universal transmission shaft and the reducer constitute a transmission mechanism for transmission between the explosion-proof motor and the three-cylinder plunger pump. The plunger pump group also includes a lubrication system for lubricating the transmission mechanism. The lubrication system includes a lubrication pipeline for conveying lubricating liquid and a lubricating liquid pump for providing conveying power for the lubricating liquid. An oil pump transmission wheel is provided at the rear end of the power output shaft of the explosion-proof motor. The oil pump transmission wheel is connected to the input end of the lubricating liquid pump through a transmission belt. The explosion-proof motor provides working power for the lubricating liquid pump.

[0003] The patent publication number CN211500958U was retrieved, and the patent name was a public material of a new type of small acid fracturing plunger pump, and specifically disclosed a new type of small acid fracturing plunger pump, including a base plate, a fixed shell, a mounting pipe, a valve, a connecting pipe, a disassembly sealing protection water inlet pipe structure, an isolation sealing protection water filter frame structure, a mounting plate, a support plate, a support block, a fastening plate and a pump body. The fixed shell is bolted to the middle position of the upper surface of the base plate; the mounting pipe is bolted to the lower part of the right side of the fixed shell; the valve is threadedly connected to the right side of the mounting pipe; the connecting pipe is threadedly connected to the right side of the valve; the disassembly sealing protection water inlet pipe structure is installed in the middle position of the left side of the fixed shell; the isolation sealing protection The water-liquid filtering frame structure is installed on the left side inside the mounting tube; the mounting plate is bolted to the middle position of the upper surface of the base plate; the supporting plate is bolted to the middle position of the upper surface of the mounting plate; the supporting block is bolted to the middle position of the upper surface of the supporting plate; the fastening plate is bolted to the upper part of the supporting block; the disassembly sealing and protective water inlet pipe structure includes a mounting shell, a fastening pipe, a liquid inlet valve, a dredging pipe, a flange, a supporting pipe and a sleeve, and the fastening pipe is threadedly connected to the middle position of the right side of the mounting shell; the liquid inlet valve is threadedly connected to the upper part of the mounting shell; the dredging pipe is threadedly connected to the lower part of the left side of the mounting shell; the flange is bolted to the left side of the dredging pipe; the supporting pipe is bolted to the middle position of the left side of the flange.

[0004] The sealing performance of the fracturing plunger pump in the prior art is poor, which affects the working efficiency. Summary of the invention

[0005] In view of this, the present invention provides a fracturing plunger pump for oil fields, which can not only realize oil inlet and oil outlet but also has high working efficiency and good sealing effect.

[0006] In order to solve the above technical problems, the present invention provides a fracturing plunger pump for oil fields, comprising:

[0007] case;

[0008] An oil suction chamber, wherein the oil suction chamber is arranged at one end of the housing, one end of the oil suction chamber is an oil inlet, and the other end is an oil outlet;

[0009] A sliding cavity, wherein the sliding cavity is arranged in the middle of the housing;

[0010] A power chamber, wherein the power chamber is arranged inside the housing, and the power chamber and the oil suction chamber are connected via a sliding chamber;

[0011] A slider, the slider is arranged inside the sliding cavity, a push rod and a shaft head are arranged on the slider, the shaft head is connected to a swing arm, the other end of the swing arm is connected to a rotating wheel, and the other end of the swing arm is connected to the edge of the rotating wheel to form an eccentricity;

[0012] The sealing mechanism comprises a sealing ring arranged on the slider and a sealing gasket arranged on the push rod, and the sealing gasket is fixed by a locking screw.

[0013] Furthermore, one end of the push rod extends into the oil suction chamber, and the pressure change in the oil suction chamber is achieved by reciprocating pushing and pulling.

[0014] Furthermore, a lubricating oil pipe A is connected to the sliding sleeve on the outer side of the push rod.

[0015] Furthermore, a lubricating oil pipe B is provided on the sliding cavity.

[0016] Furthermore, the cross-sectional shape of the sealing gasket is V-shaped, and the opening faces the push rod.

[0017] Furthermore, a fixing piece is provided at the end of the swing arm, and the fixing piece is connected to a bearing, and is connected to the swing arm through the bearing.

[0018] The beneficial effects of the above technical solution of the present invention are as follows:

[0019] 1. It can realize oil inlet and outlet. Through the cooperation of the slider and the push rod, the pressure change in the oil suction chamber is realized, with high working efficiency and good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] In the figure: 1. Shell; 2. Oil suction chamber; 3. Sliding chamber; 4. Rotor; 5. Fixing part; 6. Swing arm; 7. Shaft head; 8. Sliding block; 9. Sealing ring; 10. Sealing gasket; 11. Locking screw; 12. Push rod; 13. Lubricating oil pipe A; 14. Oil inlet; 15. Oil outlet; 16. Lubricating oil pipe B. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0023] like Figure 1 As shown:

[0024] Example 1

[0025] A fracturing plunger pump for oil fields, comprising a shell 1; an oil suction chamber 2, the oil suction chamber 2 is arranged at one end of the shell 1, one end of the oil suction chamber 2 is an oil inlet 14, and the other end is an oil outlet 15; a sliding chamber 3, the sliding chamber 3 is arranged in the middle of the shell 1; a power chamber, the power chamber is arranged inside the shell 1, and the power chamber and the oil suction chamber 2 are connected through the sliding chamber 3; a sliding block 8, the sliding block 8 is arranged inside the sliding chamber 3, a push rod 12 and a shaft head 7 are arranged on the sliding block 8, the shaft head 7 is connected to a swing arm 6, the other end of the swing arm 6 is connected to a runner 4, and the other end of the swing arm 6 is connected to the edge of the runner 4 to form an eccentricity; a sealing mechanism, the sealing mechanism comprises a sealing ring 9 arranged on the sliding block 8, and a sealing pad 10 arranged on the push rod 12, and the sealing pad 10 is fixed by a locking screw 11.

[0026] In this embodiment, the housing 1 is a housing 1 of a plunger pump, in which an oil suction chamber 2, a sliding chamber 3 and a power chamber are provided, and an oil inlet 14 and an oil outlet 15 are provided on the oil suction chamber 2. A slider 8 is provided in the sliding chamber 3, and the movement of the slider 8 drives the push rod 12 to reciprocate to realize the pressure change in the oil suction chamber 2. The operating power of the slider 8 is realized in the power chamber.

[0027] Example 2

[0028] One end of the push rod 12 extends into the oil suction chamber 2, and the pressure change in the oil suction chamber 2 is achieved by reciprocating pushing and pulling.

[0029] Different from the above embodiment, in this embodiment, one end of the push rod 12 needs to extend into the oil suction chamber 2, and the pressure change in the oil suction chamber 2 is realized through reciprocating motion, and then the oil is transported in the oil inlet 14 and the oil outlet 15.

[0030] Example 3

[0031] The sliding sleeve outside the push rod 12 is connected with a lubricating oil pipe A13.

[0032] Different from the above-mentioned embodiment, in this embodiment, in order to achieve a better lubrication effect, a lubricating oil pipe A13 is provided on the sliding sleeve provided on the outer side surface of the push rod 12 .

[0033] Example 4

[0034] The sliding chamber 3 is provided with a lubricating oil pipe B16.

[0035] Different from the above-mentioned embodiment, in this embodiment, since a sliding block 8 is provided in the sliding chamber 3 , a lubricating oil pipe B16 is provided on the sliding chamber 3 .

[0036] Example 5

[0037] The sealing gasket 10 has a V-shaped cross section, and its opening faces the push rod 12 .

[0038] Different from the above-mentioned embodiment, in this embodiment, in order to achieve a better sealing effect, the cross-sectional shape of the sealing gasket 10 is designed to be V-shaped, and the opening fits the push rod 12 .

[0039] Example 6

[0040] A fixing part 5 is provided at the end of the swing arm 6 , and the fixing part 5 is connected to a bearing, and is connected to the swing arm 6 via the bearing.

[0041] Working method (or working principle) of the present invention:

[0042] When the present technology is working, it relies on the rotation of the impeller 4 in the power chamber to drive the eccentrically arranged swing arm 6 to swing, thereby driving the slider 8 to reciprocate in the sliding chamber 3, and the slider 8 drives the push rod 12 to reciprocate, thereby realizing the pressure change in the oil suction chamber 2, thereby realizing oil suction and oil discharge. In the present technology, research and development is carried out in terms of sealing. By setting a sealing gasket 10 with a V-shaped cross section and fixing it with a locking screw 11, a good sealing effect can be achieved.

[0043] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0044] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fracturing plunger pump for oil fields, characterized in that: include, Housing (1); An oil suction chamber (2), wherein the oil suction chamber (2) is arranged at one end of the housing (1), one end of the oil suction chamber (2) is an oil inlet (14), and the other end is an oil outlet (15); A sliding cavity (3), wherein the sliding cavity (3) is arranged in the middle of the housing (1); A power chamber, the power chamber being arranged inside the housing (1), the power chamber and the oil suction chamber (2) being connected via a sliding chamber (3); A slider (8), the slider (8) being arranged inside the sliding cavity (3), the slider (8) being provided with a push rod (12) and a shaft head (7), the shaft head (7) being connected with a swing arm (6), the other end of the swing arm (6) being connected with a rotating wheel (4), and the other end of the swing arm (6) being connected to the edge of the rotating wheel (4) to form an eccentricity; A sealing mechanism comprises a sealing ring (9) arranged on a slider (8) and a sealing pad (10) arranged on a push rod (12), wherein the sealing pad (10) is fixed by a locking screw (11).

2. A fracturing plunger pump for oil fields according to claim 1, characterized in that: One end of the push rod (12) extends into the oil suction chamber (2), and pressure changes in the oil suction chamber (2) are achieved through reciprocating pushing and pulling.

3. A fracturing plunger pump for oil fields according to claim 2, characterized in that: A lubricating oil pipe A (13) is connected to the sliding sleeve outside the push rod (12).

4. A fracturing plunger pump for oil fields according to claim 3, characterized in that: The sliding cavity (3) is provided with a lubricating oil pipe B (16).

5. A fracturing plunger pump for oil fields according to claim 4, characterized in that: The cross-sectional shape of the sealing gasket (10) is V-shaped, and the opening faces the push rod (12).

6. A fracturing plunger pump for oil fields according to claim 5, characterized in that: A fixing member (5) is provided at the end of the swing arm (6), and the fixing member (5) is connected to a bearing, and is connected to the swing arm (6) via the bearing.

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