Gas-liquid two-phase reverse driving vertical compression pump

Abstract

The present application belongs to the new technical field of integrated compressor and pump functions, and discloses a gas-liquid two-phase reverse driving vertical compression pump, which comprises a driving motor speed reducer, a three-throw five-support-point split crankshaft, a bearing connecting sleeve, an integral connecting rod, a reverse driving crosshead, a combined plunger, a pump body, an inlet and outlet gas-liquid two-phase combined valve, a bearing, a bearing cover, a bearing seat, a pump cover, a bearing gland and a sealing assembly; the driving motor speed reducer shaft is directly connected with the inner hole of the three-throw five-support-point split crankshaft to drive the three-throw five-support-point split crankshaft to rotate, and the rotation of the crankshaft is converted into the vertical reciprocating motion of the reverse driving crosshead through the integral connecting rod. The pump body and the machine body are designed in an integrated manner in the present application, so that the mold opening mold is reduced, the production is facilitated, the overall structure has high reliability, and the errors caused by assembly of the split body can be avoided; due to the coaxial arrangement of the inlet and outlet combined valve and the plunger, the pump body is clamped once, and the installation hole machining of the combined valve and the plunger is completed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of integrating the functions of compressor and pump, and particularly relates to a gas-liquid two-phase reverse driving vertical compression pump. BACKGROUND

[0002] Pump is a machine for conveying fluid or pressurizing fluid, and there are various types of pumps, among which, reciprocating pump is a volumetric pump and is widely used. The reciprocating pump realizes the function of conveying liquid through the periodic change of working cavity and the help of one-way valves at the inlet and outlet of the working cavity. The reciprocating pump mainly includes piston pump, plunger pump, diaphragm pump, pressure test pump and metering pump.

[0003] Through the above analysis, the problems and defects of the prior art are as follows:

[0004] (1) The reciprocating pump is mostly suitable for liquid working conditions and is not suitable for pure gas working conditions, and the reciprocating compressor is only suitable for gas working conditions and is not suitable for liquid working conditions, so that the existing pump, compressor and other general machines are difficult to meet the requirements of gas-liquid mixed conveying process, especially the oil-gas two-phase mixed flow working condition in oil field.

[0005] (2) The power end reciprocating mechanism of the existing vertical reciprocating pump or compressor is usually designed by positive driving and the cross head is arranged on the top. Firstly, the lubrication is difficult and insufficient, which easily causes dry grinding failure. Secondly, the distance between the cross head and the base is long, the overturning torque is large, the product is unstable in operation, and the vibration and noise are large.

[0006] (3) The power end of the existing reciprocating pump or compressor is connected with the speed reducer through a shaft coupling, and there is a poor centering and difficult adjustment. Not only is it easy to cause eccentric wear, leakage of lubricating oil and other failures, but also the power loss reduces the product efficiency, and affects the product operation stability and vibration noise.

[0007] (4) The power end of the existing reciprocating pump or compressor usually adopts a traditional integral crankshaft, and the crank is only configured with a sliding bearing. The sliding bearing has high requirements for the precision, roughness and hardness of the contact surface of the crank. The transmission efficiency is lower than that of rolling bearing, and the lubrication requirement is high. SUMMARY

[0008] In view of the problems existing in the prior art, the present application provides a gas-liquid two-phase reverse driving vertical compression pump.

[0009] The present application is realized as follows: a gas-liquid two-phase reverse driving vertical compression pump comprises a driving motor speed reducer, a three-crank five-branch point split crankshaft, a bearing connecting sleeve, an integral connecting rod, a reverse driving cross head, a combined plunger, a pump body, an inlet and outlet gas-liquid two-phase combined valve, a bearing, a bearing cover, a bearing seat, a pump cover, a bearing gland, and a sealing assembly.

[0010] The driving motor reducer shaft is directly connected with the three-throw five-joint split crankshaft inner hole, drives the three-throw five-joint split crankshaft to rotate, and through the whole connecting rod, the rotation of the crankshaft is converted into the vertical reciprocating motion of the reverse driving cross head.

[0011] The bearing connecting sleeve is connected with the driving motor reducer at one end and connected with the machine pump body at the other end, so that the driving motor reducer and the machine pump body are directly connected (the shaft coupling is saved, the length is shortened, the connection accuracy is improved, and the problems of traditional products, such as poor centering, difficult adjustment, easy to produce eccentric wear, leakage of lubricating oil, power loss, reduction of efficiency, operation stability and vibration noise, etc., are solved).

[0012] The gas-liquid two-phase reverse driving vertical compression pump, the inlet and outlet gas-liquid combination valve and the combination plunger are coaxially vertically arranged, and the inlet and outlet gas-liquid combination valve is arranged above the combination plunger (so that the product has the function of discharging gas first and then discharging liquid).

[0013] The reverse driving cross head drives the combination plunger to reciprocate, the combination plunger is provided with an external sealing assembly, the inlet and outlet gas-liquid two-phase combination valve is arranged on the sealing assembly, and a closed cavity is formed in the machine pump body. When the combination plunger moves downward, the volume of the closed cavity increases, the pressure decreases, the inlet one-way valve in the inlet and outlet gas-liquid two-phase combination valve opens, and the gas or liquid medium enters the cavity. When the combination plunger moves upward, the volume of the closed cavity decreases, the pressure increases, the outlet one-way valve in the inlet and outlet gas-liquid two-phase combination valve opens, and the gas or liquid medium is discharged from the cavity. The gas-liquid medium is continuously inhaled and discharged through the inlet and outlet gas-liquid two-phase combination valve. Especially important is that the gas-liquid medium enters the closed cavity, the gas is placed in the upper part of the closed cavity, and the liquid is placed in the lower part of the closed cavity. When the outlet gas-liquid one-way valve works, it has the characteristics of discharging gas first and then discharging liquid, so that the product has a unique gas-liquid mixing function, and the influence of the residual volume on the gas conveying performance of the product can be eliminated, the dry grinding of the reciprocating seal can be prevented, and the service life can be prolonged.

[0014] Further, the reverse driving cross head is composed of a traditional cross head reverse four-rib hollow driving head.

[0015] Further, the reverse driving cross head has a hollow structure in the middle, and the crankshaft crank is vertically through the cross head.

[0016] Further, the reverse driving cross head has a hollow structure in the middle, and the connecting rod is arranged in the hollow space in the middle and freely moves under the driving of the crankshaft.

[0017] Further, the cross driving head of the compression pump needs to be arranged upward, and the reverse driving cross head and the cross head slide are arranged downward and intrude into the oil pool.

[0018] Further, the reverse drive crosshead support slide is arranged below the three-throw five-fulcrum split crankshaft in the pump body, and compared with the conventional crosshead support slide arranged above the crankshaft, the distance to the pump bottom surface is short (more than 2 / 3 shortened).

[0019] Further, the gas-liquid two-phase reverse drive vertical compression pump, the inlet and outlet gas-liquid combination valve and the combination plunger are coaxially and vertically arranged.

[0020] Further, the gas-liquid two-phase reverse drive vertical compression pump, the inlet and outlet gas-liquid combination valve is arranged above the combination plunger.

[0021] Further, the gas-liquid two-phase reverse drive vertical compression pump, a sealing assembly is arranged outside the combination plunger.

[0022] Further, the gas-liquid two-phase reverse drive vertical compression pump, the sealing assembly is arranged in the pump body.

[0023] Further, the gas-liquid two-phase reverse drive vertical compression pump adopts a whole connecting rod structure (most of the conventional products are split structures, which are complex in structure and poor in process; the connecting bolt is large in stress, and it is difficult to control the pre-tightening force).

[0024] Further, the gas-liquid two-phase reverse drive vertical compression pump, rolling bearings are arranged between the crank and the whole connecting rod (most of the conventional products adopt sliding bearings, the sliding bearings are high in requirements for the precision, roughness and hardness of the contact surface of the crank, the transmission efficiency is lower than that of the rolling bearings, and lubrication is difficult).

[0025] Further, the pump body and the machine body of the gas-liquid two-phase reverse drive vertical compression pump are integrally arranged.

[0026] Further, the inlet and outlet combination valve and the plunger are coaxially arranged, and the pump body is clamped once.

[0027] In combination with the above technical solutions and the technical problems solved, the technical solutions to be protected by the present application have the following advantages and positive effects:

[0028] The gas-liquid two-phase reverse driving vertical compression pump provided by the application has a compact structure, a short pump body height, and cost saving; the cross head of the gas-liquid two-phase reverse driving vertical compression pump is supported and arranged at the lower center of the pump, and the pump is not easy to overturn during operation.

[0029] The gas-liquid two-phase reverse driving vertical compression pump provided by the application has a compact structure, a short pump body height, and cost saving; the cross head of the gas-liquid two-phase reverse driving vertical compression pump is supported and arranged at the lower center of the pump, and the pump is not easy to overturn during operation.

[0030] The oilfield associated gas is natural gas escaping from an oil well, and more than 100 billion cubic meters of associated gas is produced in China every year. At present, more than 70% of the associated gas is burned or wasted, which not only wastes green energy but also pollutes the environment. After the technical scheme of the application is transformed, advanced equipment can be provided for eliminating torches, recovering natural gas and protecting the environment. A single product can recover 3000-6000 m3 of natural gas per day, 1-2 million cubic meters of natural gas per year, and the social benefits of a single product can reach 1.5-3 million yuan per year. The annual added value can reach hundreds of millions of yuan, and the profit and tax can be about 30-50% of the value.

[0031] The technical scheme of the application fills the technical gap in the industry at home and abroad. The product adopts a vertical structure, a reverse driving cross head, a three-throw five-point split crankshaft, a bearing connecting sleeve, an integral connecting rod, a combined plunger and an integral pump body, and has the functions of a reciprocating pump and a compressor. No similar product has been found.

[0032] The technical scheme of the application solves the technical problems that people have been eager to solve but have failed to solve successfully. If the technical scheme is successfully implemented, advanced equipment can be provided for eliminating torches, recovering natural gas and protecting the environment. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is a structural schematic diagram of a gas-liquid two-phase reverse driving vertical compression pump provided by an embodiment of the application.

[0034] In the diagram: 1. Drive motor reducer; 2. Bearing connecting sleeve; 3. Three-crankshaft with five-point support split crankshaft; 4. Combined plunger; 5. Inlet and outlet gas-liquid two-phase combined valve; 6. Pump body; 7. Integral connecting rod; 8. Reverse drive crosshead. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] To enable those skilled in the art to fully understand how the present invention is specifically implemented, this section provides an explanatory description of the embodiments that expand upon the technical solutions of the claims.

[0037] like Figure 1 As shown, the gas-liquid two-phase reverse driven vertical compression pump provided in this embodiment of the invention includes a drive motor reducer 1, a bearing connecting sleeve 2, a three-crankshaft with five fulcrums 3, a combined plunger 4, an inlet and outlet gas-liquid two-phase combined valve 5, a pump body 6, an integral connecting rod 7, a reverse drive crosshead 8, bearings, bearing covers, bearing seats, a pump cover, a bearing gland, and sealing components, etc.

[0038] The shaft of the drive motor reducer 1 is directly connected to the inner hole of the three-crank five-point split crankshaft 3, which drives the three-crank five-point split crankshaft 3 to rotate. Through the integral connecting rod 7, it acts on the reverse drive crosshead 8, converting the rotational motion of the three-crank five-point split crankshaft 3 into the vertical reciprocating motion of the reverse drive crosshead 8.

[0039] One end of the bearing connecting sleeve is connected to the drive motor reducer 1, and the other end is connected to the pump body 6, realizing a precise direct connection between the drive motor reducer 1 and the pump body 6 (saving the coupling, shortening the length, improving the connection accuracy, and solving the problems of poor alignment, difficulty in adjustment, easy to generate uneven wear, leakage of lubricating oil, power loss, reduced efficiency, operation stability and vibration noise in traditional products where the coupling is connected to the reducer).

[0040] A vertical compression pump with gas and liquid phases driven in opposite directions is used. The inlet and outlet gas and liquid phase combination valve 5 and the combination plunger 4 are set vertically and coaxially. The inlet and outlet gas and liquid phase combination valve 5 is placed above the combination plunger 4 (so that the product has the function of first venting gas and then venting liquid).

[0041] The reverse-drive crosshead 8 drives the combined plunger 4 in a reciprocating motion. With the help of an external sealing assembly on the combined plunger 4, which is equipped with inlet and outlet gas-liquid two-phase combination valves 5, a sealed cavity is formed within the pump body 6. When the combined plunger 4 moves downward, the volume of the sealed cavity increases, the pressure decreases, and the inlet check valve in the inlet and outlet gas-liquid two-phase combination valves 5 opens, allowing gas or liquid media to enter the cavity. When the combined plunger 4 moves upward, the volume of the sealed cavity decreases, the pressure increases, and the outlet check valve in the inlet and outlet gas-liquid two-phase combination valves 5 opens, allowing gas or liquid media to exit the cavity. This cycle continues, with gas and liquid media constantly being drawn in and discharged through the inlet and outlet gas-liquid two-phase combination valves 5. Crucially, when gas and liquid media enter the sealed cavity, the gas is positioned in the upper part and the liquid in the lower part. When the outlet gas-liquid check valve is in operation, it exhibits the characteristic of discharging gas first and then liquid, giving the product a unique gas-liquid mixed-transmission function. This also eliminates the influence of clearance volume on the product's gas delivery performance, prevents dry friction of the reciprocating seal, and extends service life.

[0042] The reverse-drive crosshead 8 is constructed by adding a four-ribbed, hollowed-out drive head to the traditional crosshead in reverse. The reverse-drive crosshead 8 features a hollowed-out structure in the middle, through which the crankshaft crank passes perpendicularly. The connecting rod is positioned within this hollowed-out space and moves freely under the drive of the crankshaft.

[0043] The crosshead of the compression pump needs to be positioned upwards, while the reverse drive crosshead 8 and crosshead slide are positioned downwards and submerged in the oil sump. The reverse drive crosshead 8 support slide is located in the pump body 6 below the three-crankshaft and five-point split crankshaft 3. Compared with the traditional crosshead support slide being located above the crankshaft, the distance to the bottom of the pump is shorter (more than 2 / 3 shorter).

[0044] This is a vertical compressor pump with two-phase gas-liquid phase drive. The inlet and outlet gas-liquid phase combination valves 5 and the combination plunger 4 are arranged coaxially and vertically. The inlet and outlet gas-liquid combination valves 5 are positioned above the combination plunger 4. A sealing assembly is installed outside the combination plunger 4. The sealing assembly is located inside the pump body 6. This vertical compressor pump with two-phase gas-liquid phase drive adopts an integral connecting rod structure (traditional products mostly have split structures, which are complex, have poor manufacturability, and the connecting bolts are subject to high stress and difficult preload control).

[0045] A vertical compressor pump with gas and liquid driving in opposite directions is used. A rolling bearing is installed between the crank and the integral connecting rod 7 (most traditional products use sliding bearings, which have high requirements for the precision, roughness and hardness of the crank contact surface, and the transmission efficiency is lower than that of rolling bearings, and lubrication is also difficult).

[0046] The pump body and frame of the vertical compressor pump with gas and liquid reverse drive are integrated.

[0047] The inlet and outlet combination valve and the plunger are coaxially arranged, and the machine pump body is clamped once.

[0048] The driving motor of the present application drives the rotation of the crankshaft, and the rotation movement of the crankshaft is converted into the vertical reciprocating movement of the reverse drive crosshead through the connecting rod, and the reverse drive crosshead drives the reciprocating movement of the plunger. Due to the volume change in the machine pump body, the medium is continuously sucked and discharged through the inlet and outlet combination valve. The reverse drive crosshead is composed of a traditional crosshead with four hollow driving heads added reversely; the hollow structure in the middle of the reverse drive crosshead can vertically pass through the crosshead; the connecting rod can be arranged in the hollow space in the middle of the reverse drive crosshead and can freely move under the driving of the crankshaft; the gas-liquid two-phase reverse drive vertical compression pump, the cross drive head needs to be arranged upward, then the reverse drive crosshead and the crosshead slide way are placed in the oil pool, lubricated well and reliable operation; the distance between the reverse drive crosshead and the pump bottom surface is short, the overturning torque is small, and the operation is stable; the gas-liquid two-phase reverse drive vertical compression pump, the inlet and outlet combination valve and the plunger are coaxially arranged vertically, the gas medium is easy to be discharged, and the volumetric efficiency is high; the gas-liquid two-phase reverse drive vertical compression pump, the pump body and the machine body are designed as a whole, reducing the mold opening, facilitating production, and the overall structure has high reliability, which can avoid the errors caused by processing and assembly; the gas-liquid two-phase reverse drive vertical compression pump, due to the coaxial arrangement of the inlet and outlet combination valve and the plunger, the machine pump body is clamped once, the installation hole processing of the combination valve and the plunger can be completed, the processing is convenient, and there is no processing error; the above design makes the structure of the gas-liquid two-phase reverse drive vertical compression pump more compact, the height of the machine pump body is short, and the cost is saved; the crosshead and the center of the gas-liquid two-phase reverse drive vertical compression pump are low, and the pump is not easy to overturn during operation.

[0049] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0050] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any modification, equivalent replacement and improvement made by any person skilled in the art within the technical scope disclosed by the present application shall be covered within the protection scope of the present application.

Claims

1. A vertical compression pump with gas-liquid two-way reverse drive, characterized in that, The gas-liquid two-way reverse driven vertical compression pump includes: a drive motor reducer and a three-crankshaft with five support points; The drive motor reducer is directly connected to the inner hole of the three-crankshaft with five-point support. One end of the bearing connecting sleeve is connected to the drive motor reducer, and the other end is connected to the pump body. The inlet and outlet gas-liquid combination valves and the combination plunger of the gas-liquid two-way reverse-drive vertical compressor are coaxially and vertically arranged, with the inlet and outlet gas-liquid combination valves positioned above the combination plunger. The reverse drive crosshead support slide is located in the pump body below the three-turn, five-support split crankshaft; The reverse drive crosshead is composed of a crosshead with four ribs added in the reverse direction to form a hollow drive head, thus forming a hollow structure in the middle of the reverse drive crosshead. The crankshaft crank passes vertically through the hollow structure in the middle of the reverse drive crosshead. The connecting rod is set in the space of the middle hollow structure, and the lower end of the connecting rod is connected to the lower end of the reverse drive crosshead. The upper end of the connecting rod is connected to the crankshaft crank that passes vertically through the middle hollow structure of the reverse drive crosshead. The connecting rod moves freely under the drive of the crankshaft.

2. The vertical compression pump with gas-liquid two-way reverse drive as described in claim 1, characterized in that, The reverse drive crosshead of the gas-liquid two-way reverse driven vertical compressor pump needs to be arranged upwards, and the lower end of the reverse drive crosshead and the reverse drive crosshead support slide is placed in the oil sump.

3. The vertical compression pump with gas-liquid two-way reverse drive as described in claim 1, characterized in that, A sealing assembly is installed on the outside of the combined plunger; the sealing assembly is located inside the pump body.

4. The vertical compression pump with gas-liquid two-way reverse drive as described in claim 1, characterized in that, The connecting rod of the gas-liquid two-way reverse driven vertical compressor pump adopts an integral connecting rod structure, and a rolling bearing is installed between the crank and the integral connecting rod.

5. The vertical compression pump with gas-liquid two-way reverse drive as described in claim 1, characterized in that, The pump body and frame of the vertical compressor pump with gas and liquid reverse drive are integrated.

6. The vertical compression pump with gas-liquid two-way reverse drive as described in claim 1, characterized in that, The inlet and outlet combination valves and plungers are arranged coaxially, and the pump body is clamped in one go.

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