CN213899197U

CN213899197U - Can prevent that mud from getting into plunger pump of power end

Info

Publication number: CN213899197U
Application number: CN202021461313.4U
Authority: CN
Inventors: 张斌; 王传鸿; 张磊; 曲玉强; 李振峰; 李宏化
Original assignee: SJS Ltd
Current assignee: SJS Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-08-06
Anticipated expiration: 2030-07-22

Abstract

The utility model provides a can prevent that mud from getting into plunger pump of power end, includes by reduction gear, bent axle, the power end that the connecting rod connected on the bent axle is constituteed with the fluid end, and it is unique to lie in: the one end of power end is the output, still have a cross head in the power end, this cross head one end is connected the other end through round pin axle and connecting rod and is passed through transmission and be connected with hydraulic end plunger, transmission passes and forms airtight cavity with the sealing member cooperation that sets up on output port from the output of power end. The utility model has the advantages that: the device can prevent slurry at the hydraulic end from entering the power end, thereby ensuring the cleanness of parts in the power end.

Description

Can prevent that mud from getting into plunger pump of power end

Technical Field

The utility model relates to an oil drilling field, especially a can prevent that mud from getting into plunger pump of power end.

Background

Oil gas field well cementation cement truck usually uses two plunger pumps to arrange back to back, and this kind of double pump is arranged displacement pressure interval wide range, and the reliability is high. However, although the conventional plunger pump meets the equipment requirements on the back-to-back arrangement size of the double pumps, the whole pump is small in size, structurally, the plunger pump is directly connected with the power end crosshead by adopting the plunger at the hydraulic end of the plunger pump, and after the hydraulic end high-pressure sealing packing fails, high-pressure liquid or cement paste directly rushes into the power end, so that lubricating oil at the power end is polluted, parts fail, and the serious power end is directly scrapped.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can prevent that mud from getting into the plunger pump of power end, it can prevent that hydraulic end mud from getting into the power end to guaranteed the cleanness of spare part in the power end, prolonged its life.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides a can prevent that mud from getting into plunger pump of power end, includes by reduction gear, bent axle, connect the power end that the connecting rod on the bent axle constitutes with the fluid end, its characterized in that: the one end of power end is the output, still have a cross head in the power end, this cross head one end is connected the other end through round pin axle and connecting rod and is passed through transmission and be connected with hydraulic end plunger, transmission passes and forms airtight cavity with the sealing member cooperation that sets up on output port from the output of power end.

And the transmission device is a push rod, and the diameter of the push rod is larger than 115.7 mm.

The cross section of the end with the smaller diameter of the connecting rod is arc-shaped and is fixedly connected with a pin shaft, and oil holes are also formed in the pin shaft and the connecting rod; the length of the pin shaft is larger than the thickness of the connecting rod.

And a pin shaft copper bush is arranged between the contact surfaces of the crosshead and the pin shaft, and the cross sections of the two ends of the pin shaft copper bush are O-shaped, and the cross section of the middle part of the pin shaft copper bush is arc-shaped.

And the pin shaft copper bush has the same width with the crosshead and is matched with the crosshead hole to form a sliding thrust surface.

And the seal is an oil seal.

The utility model has the advantages that:

1. the small end of the connecting rod of the semi-cylinder is mechanically connected with the left cylindrical surface of the pin shaft, the right cylindrical surface of the pin shaft is utilized to directly push the crosshead, the length of the connecting rod and the space of the crosshead are reduced, and therefore the length of the plunger pump is reduced.

3. The crosshead copper sheathing length equals the crosshead width, and the longest thrust friction surface in the limited space of the crosshead that forms reduces frictional stress, has improved the sliding friction reliability, reduces the power end overhaul.

4. The transmission device penetrates through the output end of the power end and is connected with the plunger in the hydraulic end. Because the diameter of the transmission device is far larger than that of the plunger, and the transmission device and the sealing element form a small and long and narrow sealing cavity, water or slurry is prevented from entering the power end, and the waste of the power end is prevented.

Drawings

FIG. 1 is a schematic diagram of a plunger pump configuration that prevents mud from entering the plunger pump;

FIG. 2 is a cross-sectional view of a left side view of the plunger pump to prevent mud from entering;

FIG. 3 is a schematic view of the structure of a connecting rod (with a pin shaft) and a crosshead (with a copper sleeve);

Detailed Description

Referring to fig. 1 to 3, the present invention will be further described with reference to the following embodiments.

The utility model relates to an oil drilling field, especially a can prevent that mud from getting into plunger pump of power end, include power end 1 and the hydraulic end 2 of forming by reduction gear 10, bent axle 11, connecting in the connecting rod 3 on bent axle 11, it is unique lies in: the one end of power end 1 is the output, still have a cross head 6 in the power end 1, this cross head 6 one end is connected the other end through round pin axle 4 and connecting rod 3 and is connected with hydraulic end plunger 8 through transmission 7, transmission 7 passes and forms airtight cavity with the sealing member 9 cooperation that sets up on the output port from the output of power end 1.

The crankshaft 11 in the power end 1 is connected with the hydraulic end plunger 8 through the transmission device 7, the transmission device 7 penetrates through the output end of the power end 1 and is matched with the sealing element 9 arranged on the output port to form a closed cavity, so that the hydraulic end plunger 8 cannot enter an oil seal of the power end 1 when reciprocating, the cleanness of parts in the power end 1 is guaranteed, and the service life of the hydraulic end plunger is prolonged.

The plunger pump has a transverse length of no more than 1.3 m and a plunger stroke of no less than 152.4 mm, thereby ensuring that it can still be used on board a vehicle in the case of a dual pump arrangement.

And the transmission device 7 is a push rod, and the diameter of the push rod 7 is larger than 115.7 mm.

The push rod is used as the transmission device 7, the structure is simple, the space is saved, and the diameter of the push rod 7 is far larger than that of the plunger, and the transmission device and the sealing piece form a small and long and narrow sealing cavity, so that water or slurry is prevented from entering the power end, and the waste of the power end is prevented.

The cross section of the end of the connecting rod 3 with smaller diameter is arc-shaped and is fixedly connected with a pin shaft 4, and oil holes are also formed in the pin shaft 4 and the connecting rod 3; the length of the pin shaft 4 is larger than the thickness of the connecting rod 3.

Adopt the arc cross-section with the less one end of connecting rod 3 diameter, utilize the right side face of cylinder of round pin axle 4 directly to promote cross head 6, can effectively reduce the length of connecting rod 3 and the shared space of cross head 6 to reduce the whole length of the pump body, can realize on-vehicle when making the double pump arrange.

The pin shaft 4 and the connecting rod 3 are internally provided with the oil hole 12, so that the pump body can perform oil lubrication on a sliding thrust surface formed by matching the crosshead 6 and the pin shaft brasses 5 through the oil hole 12 during working, friction is reduced, and the service life is prolonged.

And a pin shaft copper tile 5 is also arranged between the contact surfaces of the crosshead 6 and the pin shaft 4, and the cross sections of the two ends of the pin shaft copper tile 5 are O-shaped, and the cross section of the middle part of the pin shaft copper tile is arc-shaped.

Set up round pin axle brasses 5 between the contact surface of cross head 6 and connecting rod round pin axle 4, multiplicable sliding contact area increases its intensity, increase life.

And the pin shaft copper bush 5 and the crosshead 6 have the same width and are matched with a crosshead hole to form a sliding thrust surface.

The width of the pin shaft copper bush 5 is equal to that of the crosshead 6, the longest thrust friction surface is formed in the limited space of the crosshead 6, the friction stress is reduced, the sliding friction reliability is improved, and the power end overhaul is reduced.

And the seal 9 is an oil seal.

The push rod penetrates through the oil seal and is matched with the oil seal to form a closed cavity.

Claims

1. The utility model provides a can prevent that mud from getting into plunger pump of power end, includes by reduction gear, bent axle, connect the power end that the connecting rod on the bent axle constitutes with the fluid end, its characterized in that: the one end of power end is the output, still have a cross head in the power end, this cross head one end is connected the other end through round pin axle and connecting rod and is passed through transmission and be connected with hydraulic end plunger, transmission passes and forms airtight cavity with the sealing member cooperation that sets up on output port from the output of power end.

2. The plunger pump of claim 1 wherein the plunger pump prevents mud from entering the power end, further comprising: the transmission device is a push rod, and the diameter of the push rod is larger than 115.7 mm.

3. The plunger pump of claim 1 wherein the plunger pump prevents mud from entering the power end, further comprising: the cross section of the end of the connecting rod with smaller diameter is arc-shaped and is fixedly connected with a pin shaft, and oil holes are also formed in the pin shaft and the connecting rod; the length of the pin shaft is larger than the thickness of the connecting rod.

4. A plunger pump for preventing mud from entering a power end as defined in claim 3, wherein: and a pin shaft copper bush is also arranged between the contact surfaces of the crosshead and the pin shaft, and the cross sections of the two ends of the pin shaft copper bush are O-shaped, and the cross section of the middle part of the pin shaft copper bush is arc-shaped.

5. The plunger pump of claim 4 wherein the plunger pump prevents mud from entering the power end, further comprising: the pin shaft copper bush has the same width as the crosshead and is matched with the crosshead hole to form a sliding thrust surface.

6. The plunger pump of claim 1 wherein the plunger pump prevents mud from entering the power end, further comprising: the seal is an oil seal.