WO2017067467A1

WO2017067467A1 - Miniature high-pressure submersible pump

Info

Publication number: WO2017067467A1
Application number: PCT/CN2016/102638
Authority: WO
Inventors: 胡学文
Original assignee: 胡学文
Priority date: 2015-10-23
Filing date: 2016-10-20
Publication date: 2017-04-27
Also published as: CN105257500A

Abstract

A miniature high-pressure submersible pump, comprising a housing (1), a piston (2), a piston ring (3), a connecting rod (4), a crankshaft (5), an inlet valve (6), an outlet valve (7) and an active valve opening apparatus. A rocker arm (9) is hingedly connected at the inlet of the inlet valve (6), and a slide passage (10) is provided on the housing (1); a push rod (8) is slidably fixed in the slide passage (10); a cam component (11) is provided on the crankshaft (5), one end of the push rod (8) being fit to the face of the cam and the other end connected to one end of the rocker arm (9); the other end of the rocker arm (9) is connected to the valve core component of the inlet valve (6); and either the push rod (8) or rocker arm (9) is provided with a return spring (12); the push rod (8) can move reciprocatingly along the slide passage (10) as the crankshaft (5) rotates, thereby controlling the opening of the inlet valve (6). The present pump works reliably, and pumping pressure is higher and not affected by the temperature of the medium; the pump can be used to pressurize and convey low-viscosity liquids like liquid nitrogen.

Description

Manual Title: Micro high pressure submersible pump

Technical field

[0001] The present invention relates to a submersible pump, and in particular to a miniature high pressure submersible pump that can be applied to a low viscosity liquid.

Background technique

[0002] Existing submersible pumps, mostly centrifugal pumps, are medium to low pressure delivery. Conventional multi-stage centrifugal pumps, vane pumps, rotor pumps, gear pumps, plunger pumps, etc., due to the large internal leakage and the inability to solve lubrication problems, encounter low-viscosity liquids (such as: water), will be helpless. It is not possible to deliver at higher pressures (the friction surface of the plunger pump needs to be lubricated with oil and cannot be used in low viscosity liquid environments). Conventional submersible pumps or submersible pumps, typically below -40 ° C, can cause some components to fail and fail to function properly. technical problem

The technical problem to be solved by the present invention is: To solve the above problems, a micro high pressure submersible pump which can be used for low viscosity liquid pumping in a low temperature environment is provided.

Problem solution

Technical solution

[0004] The technical solution of the present invention is: a miniature high-pressure submersible pump including a housing, a piston, a piston ring, a connecting rod, a crankshaft, an inlet valve, an outlet valve, an active valve opening device composed of a jack and a rocker arm The rocker arm is hinged at the inlet of the inlet valve, the housing is provided with a slide rail, the jack is slidably fixed in the slide rail, the crankshaft is provided with a cam component, and one end of the jack is matched with the cam surface. The other end is connected to one end of the rocker arm, the other end of the rocker arm is connected with the valve core member of the inlet valve, and the top rod or the rocker arm is provided with a return spring. Under the action of the cam member and the return spring, the jack can rotate with the crankshaft. Reciprocating along the slideway causes the rocker arm to swing, thereby controlling the opening of the inlet valve.

Advantageous effects of the invention

Beneficial effect

[0005] It has the advantages of reliable operation, higher pumping pressure and no influence on the temperature of the medium, and can be used for pressurizing and conveying low-viscosity liquid such as liquid nitrogen. The oil liquid is delivered for better effect and higher pressure. Actively populated inlet valves ensure the effectiveness and reliability of working in harsh environments. This product has no lubrication conditions Requires, adaptable to water, and high pressure delivery of various low viscosity, high and low temperature liquid media. This product uses a piston, sealed by a piston ring, without the contact surface of the plunger; the crankshaft is used instead of the cam drive; the active valve is not affected by the medium and the ambient temperature, and the lubrication condition is not required.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of the present invention;

2 is a side view showing the structure of a cam and a jack of the present invention.

detailed description

[0008] As shown in Figures 1 and 2, a miniature high pressure submersible pump comprising a housing 1, a piston 2, a piston ring 3, a connecting rod 4, a crankshaft 5, an inlet valve 6, an outlet valve 7, a ram 8 and a rocker The active valve opening device of the arm 9 is hinged at the inlet of the inlet valve 6, and the housing 1 is provided with a slide 10, and the ram 8 is slidably fixed in the slide 10 The crankshaft 5 is provided with a cam member 11, one end of which is engaged with the cam surface, the other end is connected to one end of the rocker arm 9, and the other end of the rocker arm 9 is connected with the valve core member of the inlet valve 6, the ram 8 or the rocker The arm 9 is provided with a return spring 12, and under the action of the cam member 11 and the return spring 12, the jack 8 can reciprocate along the slide 10 with the rotation of the crankshaft 5, causing the rocker arm 9 to swing, thereby controlling the inlet valve 6. Qi Kai. The active valve hoisting device ensures the effectiveness and reliability of the work.

The inlet valve 6 is a ball valve including a valve ball 13 and a spring 14, and the other end of the rocker arm 9 opens the inlet valve 6 by pressing against the surface of the valve ball 13. The valve ball 13 can be engaged with the copper sleeve and automatically enters the mating surface after returning.

[0010] The housing 1 includes a cylinder barrel 15 and a pump seat 16, and the cylinder barrel 15 and the pump base 16 are screwed. The use of a split structure facilitates the use of different materials and facilitates machining assembly.

[0011] The cam member 11 is provided at an end of the crankshaft 5. The range of motion of the cam member 11 is within the radius of the crankshaft end face, which facilitates machining assembly.

[0012] Liquid suction stroke: The pump is submerged into the liquid to be transported, and is connected to the drive motor through the crankshaft. Under the driving of the motor, the crankshaft rotates and the piston reciprocates. When the piston reaches the top dead center 吋, the cam on the crankshaft pushes the ram and presses the inlet valve ball through the rocker arm. During the whole process of the piston descending, the inlet valve is always in the open state, but the outlet valve is closed under the action of the spring, which ensures the smooth suction of the liquid from the inlet valve. When the piston reaches the bottom dead center 吋, the cam is out of contact with the ram, the steel ball is restored Bit, the inlet valve is closed.

[0013] The liquid discharge stroke: As the crankshaft continues to rotate, the piston moves from the bottom dead center to the upper dead center, so that the inlet valve of the crucible has been closed, and then the pressurized liquid is topped out of the outlet valve and sent out from the passage. Until the piston reaches the top dead center, the work of this cycle ends and begins to enter the next work cycle.

[0014] It has been proved by experiments that the passive inlet valve performs well in the liquid medium at normal temperature, but the performance in the low temperature liquid, especially the ultra-low temperature liquid, is not satisfactory. Its main performance is: The spring pressure is small, although it can ensure the natural inhalation smoothly, but the closure is not enough and the sealing is unreliable. The spring pressure is large, although it can ensure the return and reliable sealing, but the liquid is sucked in. The amount will be greatly affected, reducing the efficiency of the pump assembly.

[0015] The device uses a principle similar to the gas distribution mechanism of an internal combustion engine, adopts a steel ball active valve, has a simple structure, reliable performance, excellent positioning and sealing performance, and can accurately and accurately respond to the position of the piston. The high efficiency and reliability of the inlet valve are realized; the cam disposed on the free end surface of the crankshaft not only provides a precise phase relationship for the mechanism, but also omits the cumbersome configuration of the camshaft separately and simplifies the mechanism. Through experiments, the device can not only effectively output viscous liquid, but also effectively output non-viscosity liquid without being affected by the temperature of the medium.

Claims

Claim

Miniature high pressure submersible pump, including housing (1), piston (2), piston ring (3), connecting rod

(4), crankshaft (5), inlet valve (6) and outlet valve (7), characterized in that it also comprises an active valve opening device consisting of a jack (8) and a rocker arm (9), the rocker arm (9) hinged at the inlet of the inlet valve (6), the housing (1) is provided with a slide (10), and the ram (8) is slidably fixed in the slide (10) The crankshaft (5) is provided with a cam member (11), one end of the jack (8) is engaged with the cam surface, the other end is connected with one end of the rocker arm (9), and the other end of the rocker arm (9) is connected to the inlet valve (6). The spool member is connected, and the ejector pin (8) or the rocker arm (9) is provided with a return spring (12). Under the action of the cam member (11) and the return spring (12), the ram (8) can follow the crankshaft The rotation of (5) reciprocates along the slide (10) to cause the rocker arm (9) to swing, thereby controlling the opening of the inlet valve (6). The miniature high pressure submersible pump according to claim 1, wherein said inlet valve (6) is a ball valve including a valve ball (13) and a spring (14), and the other end of said rocker arm (9) passes Press the surface of the valve ball (13) to open the inlet valve (6).

A miniature high pressure submersible pump according to claim 1, wherein said housing (1) comprises a cylinder (15) and a pump seat (16), the cylinder (15) and the pump seat (16) are threaded Connection

[Claim 4] The micro high pressure submersible pump according to claim 1, wherein the cam member (1)

1) Located at the end of the crankshaft (5).