Pressurizing type oil-gas multiphase pump

Abstract

The utility model discloses a pressurizing type oil-gas multiphase pump which comprises a pump body, a pump cylinder provided with a liquid inlet pipe and a liquid outlet pipe, and an oil-gas multiphase pump main body formed by a piston driven by a driving component on the pump body to move back and forth in the pump cylinder, the piston comprises a piston connecting rod, a piston head is installed on the piston connecting rod, a buffering assembly is arranged on the piston connecting rod in a sliding mode, the buffering assembly comprises buffering plates and a connecting rod, and the two sets of buffering plates are arranged and penetrate through the piston head through the connecting rod to be connected so that the buffering plates can be arranged on the two sides of the piston head respectively; according to the pressurizing type oil-gas multiphase pump, the pulsation amplitude generated in the liquid conveying process can be effectively reduced, and meanwhile unnecessary influences on the piston caused by the fact that the piston makes direct contact with liquid are effectively avoided; and the conveying stability and the conveying uniformity of the liquid and the working efficiency of the pump body are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-gas mixed transmission pumps, in particular to a pressurized oil-gas mixed transmission pump. Background Art

[0002] In the process of oil and gas field development, as a key device, the oil-gas mixed transmission pump mainly transports crude oil containing gas, water, sand, etc., realizes the centralized purification, separation and storage of crude oil, and can also reduce the wellhead pressure and increase the production of a single well or a region. The oil-gas mixed transmission pumps produced in China are mainly divided into single-screw, double-screw, triple-screw pumps and plunger pumps according to the structural form, among which the screw pump is the most widely used.

[0003] At present, the widely used oil-gas mixed transmission pump in the market includes a reciprocating pump structure. The reciprocating pump is a positive-displacement pump that uses the reciprocating motion of a piston or a plunger in the pump cylinder to transport liquids. That is to say, it also achieves the purpose of transporting liquids by means of the periodic change of the volume in the working chamber. However, the common piston structure in the pump cylinder usually directly contacts the liquid during the reciprocating motion. On the one hand, the piston movement stroke causes an instant negative pressure in the pump cylinder, which easily causes a large flow pulsation of the liquid in the pump cylinder under the influence of pressure, affecting the uniformity of liquid transportation for downstream equipment. This is particularly obvious in the single-acting pump structure due to the acceleration of the piston movement and the intermittency of liquid discharge. On the other hand, the liquid directly contacting the piston is also likely to cause certain corrosion to the piston body, thus affecting the working stability of the piston and the sealing performance of the corresponding cavity in the pump cylinder. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pressurized oil-gas mixed transmission pump, which can effectively reduce the pulsation amplitude generated during the liquid transportation process, and at the same time effectively avoid the unnecessary influence on the piston caused by the direct contact between the piston and the liquid, further improving the transportation stability and uniformity of the liquid and the working efficiency of such a pump body.

[0005] The technical solution adopted by the utility model to solve the above problems is:

[0006] A pressurized oil-gas mixed transmission pump includes a pump body, a pump cylinder provided with an inlet pipe and a discharge pipe thereon, and an oil-gas mixed transmission pump main body formed by a piston that reciprocates in the pump cylinder driven by a driving component on the pump body. The piston includes a piston connecting rod, a piston head mounted thereon, and a buffer assembly slidably arranged. The buffer assembly includes a buffer plate and a connecting rod. The buffer plates are arranged in two groups and are connected by the connecting rod passing through the piston head so as to be respectively disposed on both sides of the piston head. Compression springs are sleeved on the connecting rods on both sides of the piston head.

[0007] Preferably, the buffer plate is slidably arranged on the connecting rod and is detachably installed on the connecting rod through a plurality of locking members rotatably arranged on the connecting rod.

[0008] Preferably, two sets of liquid inlet and outlet ports are respectively arranged in the liquid inlet pipe and the liquid outlet pipe and are located on both sides of the piston movement cavity in the pump cylinder.

[0009] Preferably, valve bodies are arranged at both the liquid inlet and outlet ports, and the valve bodies are arranged in a one-way ball valve structure.

[0010] Preferably, a plurality of piston heads installed on the piston connecting rod in the pump cylinder and the buffer assemblies connected thereto are correspondingly arranged in multiple groups, and the liquid inlet and outlet ports correspondingly arranged in the liquid inlet pipe and the liquid outlet pipe are correspondingly arranged in multiple groups and are respectively located in the corresponding chambers between the multiple piston heads in the pump cylinder.

[0011] Compared with the prior art, the present invention has the following advantages and effects:

[0012] The present invention is a pressurized oil-gas mixed transportation pump. Compared with the traditional pump body structure, the structure of this pressurized oil-gas mixed transportation pump further improves the piston structure that reciprocates in the pump cylinder. The addition of the buffer assembly on the piston head can move synchronously with the movement direction of the piston. The buffer plates in the corresponding chambers on both sides of the piston head in the pump cylinder can be in direct contact with the liquid in the chambers. When moving in the corresponding direction through the connecting rod and the matching compression spring sleeved outside it, on the one hand, it can play a certain buffering role for the instantaneous negative pressure generated in the corresponding chamber at the initial stage of the piston head movement. Then, when the negative pressure reaches a certain level, it moves synchronously in the corresponding direction following the piston head, thereby effectively reducing the pulsation amplitude generated during the liquid transportation process, improving the stability and uniformity during the liquid transportation process, and being able to appropriately stabilize the instantaneous negative pressure generated in the pump cylinder, reducing the probability of the occurrence of cylinder explosion phenomena and improving the use safety; on the other hand, the addition of the buffer assembly and the setting of the buffer plates on both sides of the piston head in the pump cylinder can effectively prevent the piston head from directly contacting the liquid and causing unnecessary influence on the piston head, thereby further improving the working stability of the piston in the pump cylinder, the sealing performance of the corresponding cavity in the pump cylinder, and the working efficiency of this pump body. Description of the Drawings

[0013] Figure 1 is a structural cross-sectional view of a pressurized oil-gas mixed transportation pump according to an embodiment of the present invention.

[0014] Figures 2-3 is an enlarged view of the pump cylinder structure and its internal corresponding structure according to an embodiment of the present invention.

[0015] Figure numbers: pump body 100, pump cylinder 101, liquid inlet pipe 102, liquid inlet port 1021, liquid discharge pipe 103, liquid discharge port 1031, driving component 104, crankshaft connecting rod 105, valve body 106, piston 1, piston connecting rod 11, piston head 12, buffer assembly 2, buffer plate 21, connecting rod 22, compression spring 221, locking piece 222. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and through examples. The following examples are intended to explain the present invention, but the present invention is not limited to the following examples.

[0017] See also Figures 1-2 The present embodiment relates to a pressurized oil-gas mixed pump, comprising a pump body 100 and a pump cylinder 101 provided with a liquid inlet pipe 102 and a liquid discharge pipe 103, and an oil-gas mixed pump main body formed by a piston 1 in the pump cylinder 101 driven by a driving component 104 on the pump body 100 to move back and forth. The piston 1 comprises a piston connecting rod 11 on which a piston head 12 is mounted and a buffer assembly 2 is slidably provided. The buffer assembly 2 comprises a buffer plate 21 and a connecting rod 22. The buffer plates 21 are arranged in two groups and are connected by passing through the piston head 12 through the connecting rod 22 so that they are respectively placed on both sides of the piston head 12. The connecting rods 22 on both sides of the piston head 12 are both provided with an adaptive compression spring 221.

[0018] Specifically in this embodiment, Figure 1 The overall structure of the pressurized oil-gas mixed transfer pump shown is that during use, the driving component 104 on the pump body 100 is connected to the piston connecting rod 11 by means of a crankshaft connecting rod 105 and drives the piston 1 to move back and forth in the pump cylinder 101. At the same time, the liquid inlet and outlet ports 1021 and 1031 in the liquid inlet pipe 102 and the liquid outlet pipe 103 are respectively connected to the chambers on both sides according to the movement characteristics of the piston 1 in the pump cylinder 101 to realize the liquid inlet and outlet transportation process. In addition, when the piston connecting rod 11 drives the piston head 12 to move back and forth under the drive of the driving component 104, the buffer assembly 2 provided on the piston head 12 can slide in the corresponding direction following the movement direction of the piston head 12. When the piston head 12 moves along the corresponding chamber in the pump cylinder 101, see Figure 2As shown, on one side of the piston head 12, the buffer plate 21 in the corresponding chamber is under the action of a certain negative pressure generated in the chamber when the piston head 12 moves. Through the connecting rod 22 passing through the through hole opened at the corresponding position of the piston head 12 and the compression spring 221 sleeved on the outside of the connecting rod 22, it can move along the direction of the buffer plate 21 on the other side of the piston head 12 and drive the buffer plate 21 on the other side to move synchronously at the same time. When the piston head 12 moves in the reverse direction, the movement mode of the buffer assembly 2 is correspondingly opposite, realizing the movement process of the buffer assembly 2. The structural setting of this type of pressurized oil-gas mixed transportation pump is an improvement on the structure of the piston 1 that reciprocates in the pump cylinder 101 compared with the traditional pump body 100 structure. The addition of the buffer assembly 2 on the piston head 12 can move synchronously with the movement direction of the piston 1. The buffer plates 21 on both sides of the piston head 12 in the corresponding chambers in the pump cylinder 101 can be in direct contact with the liquid in the chamber. When moving in the corresponding direction through the connecting rod 22 and the matching compression spring 221 sleeved on the outside of the connecting rod 22, on the one hand, it can play a certain buffering role in the instant negative pressure generated in the corresponding chamber at the initial stage of the movement of the piston head 12. Then, when the negative pressure reaches a certain level, it follows the piston head 12 to move synchronously in the corresponding direction, so as to effectively reduce the pulsation amplitude generated during the liquid transportation process, improve the stability and uniformity during the liquid transportation process, and can appropriately stabilize the instant negative pressure generated in the pump cylinder 101, reduce the probability of the occurrence of the cylinder explosion phenomenon, and improve the use safety; on the other hand, the addition of the buffer assembly 2 and the setting of the buffer plates 21 on both sides of the piston head 12 in the pump cylinder 101 can effectively prevent the piston head 12 from directly contacting the liquid and causing unnecessary influence on the piston head 12, thereby further improving the working stability of the piston 1 in the pump cylinder 101, the sealing performance of the corresponding cavity in the pump cylinder 101, and the working efficiency of this type of pump body 100.

[0019] The buffer plate 21 is slidably arranged on the connecting rod 22 and is detachably installed on the connecting rod 22 through a plurality of locking members 222 rotatably arranged on the connecting rod 22. From Figure 2As can be seen, the connecting rod 22 can be set as a threaded rod structure, and the locking member 222 is rotationally arranged on the connecting rod 22 through a threaded structure, thereby realizing the detachable connection process of the buffer plate 21. By adopting this detachable structure setting method, the distance between the two buffer plates 21 on both sides of the piston head 12 can be adjusted by rotating multiple groups of locking members 222 on the connecting rod 22, and the locking process at the corresponding distance can be realized. Thus, the elastic force of the corresponding compression springs 221 on the connecting rods 22 on both sides of the piston head 12 can be correspondingly changed. According to different usage requirements and corresponding medium transportation requirements, the buffer force of the buffer assembly 2 can be adjusted and locked through the structure of the connecting rod 22 and multiple groups of locking members 222 rotationally arranged thereon. This not only facilitates the disassembly and replacement of the buffer plate 21, improves the disassembly flexibility and usage convenience of the buffer assembly 2, but also can play a certain pressurizing effect on the piston head 12 according to different transportation media and corresponding characteristics, improve the transportation stability and transportation efficiency of the corresponding medium, and improve the applicability.

[0020] The liquid inlet 1021 and the liquid outlet 1031 provided in the liquid inlet pipe 102 and the liquid outlet pipe 103 are respectively provided with two groups and are placed on both sides of the movement cavity of the piston 1 in the pump cylinder 101. Figure 1 Or Figure 2 As can be seen from, the connection and arrangement methods of the liquid inlet 1021 and the liquid outlet 1031 in the liquid inlet pipe 102 and the liquid outlet pipe 103 with the corresponding chambers inside the pump cylinder 101. The liquid inlet 1021 and the liquid outlet 1031 arranged in two groups can further improve the transportation efficiency of the corresponding medium in this pressurized oil-gas mixed transportation pump, improve the work efficiency of the piston 1 and the utilization rate of the transportation space of the corresponding chambers in the pump cylinder 101, and meet different usage requirements.

[0021] Valves 106 are provided at both the liquid inlet 1021 and the liquid outlet 1031. The valves 106 are set as one-way ball valve structures. The valves 106 set as one-way ball valve structures at the liquid inlet 1021 and the liquid outlet 1031 can ensure the normal transportation of liquids and other media in the pump cylinder 101 while effectively improving its transportation stability and liquid outlet uniformity, and can also effectively improve the sealing performance in the pump cylinder 101. While the work is more stable, the phenomenon of air leakage or liquid leakage can be effectively reduced.

[0022] Multiple groups of piston heads 12 installed on the piston connecting rod 11 in the pump cylinder 101 and the buffer assemblies 2 connected thereto are correspondingly provided. The liquid inlets 1021 and the liquid outlets 1031 correspondingly provided in the liquid inlet pipe 102 and the liquid outlet pipe 103 are provided with multiple groups and are respectively placed in the corresponding chambers between multiple groups of piston heads 12 in the pump cylinder 101. For details, please refer to Figure 3The arrangement of the corresponding liquid inlet 1021 and liquid outlet 1031 in the liquid inlet pipe 102 and the liquid discharge pipe 103 on the pump cylinder 101 and the corresponding internal structure of the pump cylinder 101 are shown. The multiple piston heads 12 installed on the piston connecting rod 11 and the buffer assembly 2 connected to the piston head 12 can perform synchronous movement in the corresponding direction in the corresponding chamber of the pump cylinder 101 under the drive of the driving component 104 on the pump body 100, and realize the liquid delivery process through the liquid inlet 1021 and the liquid outlet 1031 in the corresponding chamber. The pump cylinder 101 with this kind of structure setting can be adaptively set and selected according to different usage requirements, so as to further improve the liquid delivery efficiency and enhance the applicability and practicability.

[0023] The above content described in this specification is only an example of the present utility model. Those skilled in the technical field to which the present utility model belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the content of this specification of the present utility model or exceed the scope defined by this claim book, they shall fall within the protection scope of the present utility model.

Claims

1. A supercharged oil-gas mixed transportation pump, comprising a pump body, a pump cylinder provided with a liquid inlet pipe and a liquid discharge pipe thereon, and an oil-gas mixed transportation pump main body formed by a piston that reciprocates in the pump cylinder driven by a driving component on the pump body, characterized in that: The piston described above includes a piston connecting rod with a piston head mounted thereon and a buffer assembly slidably arranged. The buffer assembly includes a buffer plate and a connecting rod. The buffer plates are arranged in two groups and are connected by the connecting rod passing through the piston head so as to be respectively disposed on both sides of the piston head. Compression springs are sleeved on the connecting rods on both sides of the piston head.

2. The pressurized oil-gas multiphase pump according to claim 1, wherein: The buffer plate is slidably arranged on the connecting rod and is detachably mounted on the connecting rod by a plurality of locking members rotatably arranged on the connecting rod.

3. The boosted oil-gas multiphase pump according to claim 1, wherein: There are two sets of liquid inlet and liquid outlet respectively arranged in the liquid inlet pipe and the liquid outlet pipe, and they are disposed on both sides of the piston movement cavity in the pump cylinder.

4. The pressurized oil-gas mixed transportation pump according to claim 3, characterized in that: Valve bodies are provided at both the liquid inlet and the liquid outlet, and the valve bodies are configured as one-way ball valve structures.

5. The pressurized oil-gas multiphase pump according to claim 1, wherein: There are multiple groups of piston heads mounted on the piston connecting rod in the pump cylinder and the buffer assemblies connected thereto correspondingly. There are multiple groups of liquid inlets and liquid outlets correspondingly arranged in the liquid inlet pipe and the liquid outlet pipe, and they are respectively disposed in the corresponding chambers between multiple groups of piston heads in the pump cylinder.

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