CN107387357B - High-low pressure well testing pump - Google Patents
High-low pressure well testing pump Download PDFInfo
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- CN107387357B CN107387357B CN201710764849.XA CN201710764849A CN107387357B CN 107387357 B CN107387357 B CN 107387357B CN 201710764849 A CN201710764849 A CN 201710764849A CN 107387357 B CN107387357 B CN 107387357B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a high-low pressure well test pump, and relates to the technical field of water pumps. It comprises the following steps: a reciprocating driving mechanism and a pumping mechanism driven by the reciprocating driving mechanism; the water pumping mechanism is provided with a first piston cavity and a second piston cavity with parallel axes; the first piston section is matched with the first piston cavity, and the cross section area of the first piston section is smaller than that of the second piston section; the liquid outlet pipe is communicated with the first unidirectional liquid outlet and the second unidirectional liquid outlet; the liquid inlet pipe is communicated with the first unidirectional liquid inlet and the second unidirectional liquid inlet, and is provided with a switching mechanism for placing the second unidirectional liquid inlet into bidirectional conduction. The second piston section is matched with the second piston cavity, and the first piston section is matched with the first piston cavity to form two plunger structures. The second piston section and the plunger structure of the second piston cavity are enabled or disabled through the switching mechanism, and the pumping pressure is adjusted.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to a high-low pressure well testing pump.
Background
The conventional well test pump adopts a water pump in a structure that an internal combustion engine or a motor drives an impeller, and can only regulate the water discharge amount of the well test pump by regulating the rotation speed of the internal combustion engine or the motor, so that the pumping pressure of the well test pump is difficult to accurately regulate. Meanwhile, due to the limitation of the impeller structure, the traditional well testing pump is difficult to reach higher pumping pressure.
Disclosure of Invention
The invention aims to provide a high-low pressure well test pump, which solves the technical problems that in the prior art, the pumping pressure of the traditional well test pump is difficult to accurately adjust and the pumping pressure is difficult to reach higher.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a high and low pressure well test pump, comprising: a reciprocating driving mechanism and a pumping mechanism driven by the reciprocating driving mechanism; the pumping mechanism comprises:
the pump body is connected with the reciprocating driving mechanism, a first piston cavity and a second piston cavity which are communicated with each other and are parallel to each other in axis are arranged in the pump body, a first one-way liquid inlet and a first one-way liquid outlet are arranged on the outer side of the first piston cavity, and a second one-way liquid inlet and a second one-way liquid outlet are arranged on the outer side of the second piston cavity;
the reciprocating driving mechanism is connected with a second piston section, and the second piston section is in sliding sealing fit with the second piston cavity;
the top end of the second piston section is connected with the first piston section, the first piston section is in sliding sealing fit with the first piston cavity, and the sectional area of the first piston section is smaller than that of the second piston section;
the liquid outlet pipe which is arranged on the pump body and provided with a main liquid outlet is respectively communicated with the first unidirectional liquid outlet and the second unidirectional liquid outlet; and
the liquid inlet pipe which is arranged on the pump body and provided with a main liquid inlet is respectively communicated with the first unidirectional liquid inlet and the second unidirectional liquid inlet, and a switching mechanism for placing the second unidirectional liquid inlet into bidirectional conduction is arranged in the liquid inlet pipe.
Further, the second unidirectional liquid inlet comprises: the liquid inlet is communicated between the second piston cavity and the liquid inlet pipe, the limiting plate is fixed in the liquid inlet, the valve cover is movably arranged in the liquid inlet, and the sealing limiting ring is fixed in the liquid inlet; and in the conduction direction of the liquid inlet hole, the limiting plate is positioned at one side of the valve cover facing the second piston cavity, and the sealing limiting ring is positioned at one side of the valve cover facing the liquid inlet pipe and is used for sealing fit with the valve cover.
Further, the switching mechanism comprises a rotating shaft hinged to the liquid inlet pipe, a base arranged in the liquid inlet pipe and provided with a guide hole, and a push rod penetrating through the guide hole; one end of the rotating shaft penetrates into the liquid inlet pipe, and an eccentric wheel is arranged on the end part of the rotating shaft penetrating into the liquid inlet pipe; one end of the push rod is propped against the outer edge of the eccentric wheel, and the other end of the push rod is propped against the second unidirectional liquid inlet.
Further, the first piston cavity is in clearance fit with the first piston segment, and a first sealing ring in sliding sealing fit with the first piston segment is arranged between the first piston cavity and the second piston cavity.
Further, the second piston section is in clearance fit with the second piston section, and a second sealing ring in sliding sealing fit with the second piston section is arranged at the starting end of the second piston cavity.
Further, the front end and the rear end of the reciprocating driving mechanism are respectively provided with a driving end; the pumping mechanism is provided with two front ends and rear ends which are respectively connected with the reciprocating driving mechanism.
Further, the reciprocating drive mechanism includes:
the hydraulic cylinder is provided with a power fluid inlet and a power fluid outlet, the inner cavity of the hydraulic cylinder comprises a power section and a liquid return section which are communicated with each other and are parallel to each other in axis, and the sectional area of the power section is larger than that of the liquid return section; and
the piston is arranged in the inner cavity of the hydraulic cylinder, the piston comprises a separation part, a main body part and a power part which are sequentially connected from front to back, the sectional area of the power part is larger than that of the separation part, the separation part is in sliding sealing fit with the liquid return section, the power part is in sliding sealing fit with the power section, the separation part and the power part divide the inner cavity of the hydraulic cylinder into a liquid return cavity, a back cavity and a forward cavity from front to back in sequence, the power liquid inlet is communicated with the back cavity, the power liquid outlet is communicated with the forward cavity, and an inertia valve which is used for enabling the forward cavity to be communicated with the liquid return cavity or enabling the forward cavity to be communicated with the back cavity is arranged on the piston.
Further, the inertia valve comprises a valve cavity, an inertia valve core which is positioned in the valve cavity and is used for reciprocating in the movement direction of the piston, and a guide mechanism for guiding the inertia valve core in the movement direction of the piston;
the valve cavity comprises a front end conduction ring groove, a front end step cylindrical section, a cylindrical communication section, a rear end step cylindrical section and a rear end conduction ring groove which are coaxially arranged and are sequentially communicated from front to back; the front end of the front end step cylindrical section is communicated with the opening at the inner side of the front end conduction ring groove, and the diameter of the front end step cylindrical section is larger than that of the communicating section; the rear end of the rear end step cylindrical section is communicated with the opening at the inner side of the rear end conduction ring groove, and the diameter of the rear end step cylindrical section is smaller than the outer diameter of the rear end conduction ring groove; the front end conduction ring groove is communicated with the liquid return cavity through a liquid return pipe, the rear end conduction ring groove is communicated with the backward cavity through a backward pipe, and the communication section is communicated with the forward cavity through a forward pipe;
the front end seal portion includes: the outer side surface is used for sealing a circular pipe-shaped front end sealing section of the inner side opening of the front end conduction ring groove and a front end sealing section used for sealing and matching with the front end step cylindrical section;
the rear end seal portion includes: the side surface is used for sealing a cylindrical rear end sealing section of the inner side opening of the rear end conduction ring groove and a rear end sealing section used for sealing and matching with the rear end step cylindrical section;
the front end plugging section, the front end sealing section, the connecting part, the rear end sealing section and the rear end plugging section are sequentially connected from front to back;
and a conduction gap is formed between the communication section and the connecting part, and the length of the communication section is smaller than that of the connecting part.
Further, the guide mechanism includes: the annular front end guide cavity is positioned at the front end of the valve cavity and is in sliding fit with the front end plugging section, and the cylindrical rear end guide cavity is positioned at the rear end of the valve cavity and is in sliding fit with the rear end plugging section.
Further, a balance pipe which is communicated with the liquid return cavity and the advancing cavity is arranged on the piston, a liquid return annular groove is formed in the front end face of the separation part, and the liquid return pipe is communicated with the liquid return annular groove; the rear end face of the power part is provided with an advancing annular groove, and the advancing pipe is communicated with the advancing annular groove; one end of the balance pipe is communicated with the liquid return annular groove, and the other end of the balance pipe is communicated with the advancing pipe.
The invention has the beneficial effects that: compared with the prior art, the second piston section of the high-low pressure well testing pump is matched with the second piston cavity, the first piston section is matched with the first piston cavity to form two plunger structures, and the liquid outlet pressure of the plunger structures is larger. The plunger structures of the second piston section and the second piston cavity are disabled through the switching mechanism, so that the first piston section and the first piston cavity pump liquid independently, and a first pumping pressure is formed in the liquid outlet pipe; the plunger structures of the second piston section and the second piston cavity are switched into effective states through the switching mechanism, the first piston section and the first piston cavity and the second piston section and the second piston cavity pump liquid together, and second pumping pressure is formed in the liquid outlet pipe, so that the pumping pressure is adjusted.
Drawings
FIG. 1 is a front view of a high and low pressure well test pump of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a cross-sectional view of a high and low pressure test well pump of the present invention;
fig. 5 is an enlarged view at a in fig. 4;
FIG. 6 is a cross-sectional view of the reciprocating drive mechanism of the high and low pressure test well pump of the present invention;
FIG. 7 is an enlarged view at B in FIG. 6;
FIG. 8 is an enlarged view at C in FIG. 6;
fig. 9 is a cross-sectional view of a switching mechanism of the high and low pressure well test pump of the present invention.
In the figure: 01-reciprocating driving mechanism, 02-pump body, 021-first piston cavity, 0211-first one-way liquid inlet, 0212-first one-way liquid outlet, 022-second piston cavity, 0221-second one-way liquid inlet, 0222-second one-way liquid outlet, 03-second piston segment, 04-first piston segment, 05-liquid outlet pipe, 051-main liquid outlet, 052-relief valve, 06-liquid inlet pipe, 061-main liquid inlet, 071-valve cover, 072-limiting plate, 073-sealing limiting ring, 074-liquid inlet hole, 081-rotating shaft, 082-base, 083-push rod, 084-eccentric wheel, 085-handle, 091-first sealing ring, 092-second sealing ring, 11-power liquid inlet 12-power fluid outlet, 13-power section, 14-liquid return section, 15-cylinder, 16-cylinder liner, 17-cover part, 21-partition part, 22-main body part, 23-power part, 31-liquid return cavity, 32-back cavity, 33-forward cavity, 4-inertia valve, 41-front end step cylinder section, 42-communication section, 43-rear end step cylinder section, 44-front end conducting ring groove, 45-rear end conducting ring groove, 46-connection part, 47-front end sealing section, 48-rear end sealing section, 6-connecting rod, 71-liquid return pipe, 72-forward pipe, 73-back pipe, 81-front end sealing section, 82-rear end sealing section, 83-front end guiding cavity, 84-rear end guiding cavity, 9-balance tube.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The high-low pressure well test pump provided by the invention will now be described.
As shown in fig. 1 to 4, a high-low pressure well test pump includes: a reciprocating driving mechanism 01 and a water pumping mechanism driven by the reciprocating driving mechanism 01; the pumping mechanism comprises:
the pump body 02 connected with the reciprocating driving mechanism 01, a first piston cavity 021 and a second piston cavity 022 which are communicated with each other and have axes parallel to each other are arranged in the pump body 02, a first unidirectional liquid inlet 0211 and a first unidirectional liquid outlet 0212 are arranged on the outer side of the first piston cavity 021, and a second unidirectional liquid inlet 0221 and a second unidirectional liquid outlet 0222 are arranged on the outer side of the second piston cavity 022;
the reciprocating driving mechanism 01 is connected with a second piston section 03, and the second piston section 03 is in sliding sealing fit with the second piston cavity 022;
the top end of the second piston section 03 is connected with a first piston section 04, the first piston section 04 is in sliding sealing fit with the first piston cavity 021, and the sectional area of the first piston section 04 is smaller than that of the second piston section 03;
a liquid outlet pipe 05 provided on the pump body 02 and having a main liquid outlet 051 is respectively connected to the first unidirectional liquid outlet 0212 and the second unidirectional liquid outlet 0222; and
the liquid inlet pipe 06 provided with a main liquid inlet 061 and arranged on the pump body 02 is respectively communicated with the first unidirectional liquid inlet 0211 and the second unidirectional liquid inlet 0221, and a switching mechanism for placing the second unidirectional liquid inlet 0221 into bidirectional conduction is arranged in the liquid inlet pipe 06.
Compared with the prior art, the high-low pressure well testing pump provided by the invention has the advantages that the second piston section 03 is matched with the second piston cavity 022, the first piston section 04 is matched with the first piston cavity 021 to form two plunger structures, and the liquid outlet pressure of the plunger structures is larger. The plunger structures of the second piston section 03 and the second piston cavity 022 are disabled through the switching mechanism, so that the first piston section 04 and the first piston cavity 021 pump liquid independently, and a first pumping pressure is formed in the liquid outlet pipe 05; the plunger structures of the second piston section 03 and the second piston cavity 022 are switched to be effective through the switching mechanism, the first piston section 04 and the first piston cavity 021 and the second piston section 03 and the second piston cavity 022 pump liquid together, and second pumping pressure is formed in the liquid outlet pipe 05, so that the pumping pressure is adjusted.
Specifically, a first piston chamber 021 and a second piston chamber 022 are machined in the pump body 02. The first piston chamber 021 and the second piston chamber 022 are coaxially arranged, the diameter of the second piston chamber 022 is larger than that of the first piston chamber 021, and the bottom end of the first piston chamber 021 is communicated with the top end of the second piston chamber 022. The second piston section 03 and the first piston section 04 are cylindrical, and are coaxially arranged, the bottom end of the first piston section 04 is connected to the top end of the second piston section 03, and the diameter of the second piston section 03 is larger than that of the first piston section 04. The liquid outlet pipe 05 and the liquid inlet pipe 06 are arranged in parallel and are respectively arranged on two sides of the pump body 02. The first unidirectional liquid inlet 0211 and the second unidirectional liquid inlet 0221 are arranged on one side of the pump body 02, on which the liquid inlet pipe 06 is arranged, and the first unidirectional liquid inlet 0211 and the second unidirectional liquid inlet 0221 are respectively communicated with the side walls of the first piston cavity 021 and the second piston cavity 022. The first unidirectional liquid outlet 0212 and the second unidirectional liquid outlet 0222 are arranged on one side of the pump body 02, provided with the liquid outlet pipe 05, and the first unidirectional liquid outlet 0212 and the second unidirectional liquid outlet 0222 are respectively communicated with the side walls of the first piston cavity 021 and the second piston cavity 022. The first unidirectional liquid inlet 0211, the first unidirectional liquid outlet 0212, the second unidirectional liquid inlet 0221 and the second unidirectional liquid outlet 0222 adopt valve cover type or steel ball type unidirectional valves, and the switching mechanism enables the second unidirectional liquid inlet 0221 to be in a bidirectional conduction normally open state by pushing the valve cover 071 or the steel ball. The reciprocating driving mechanism 01 adopts a hydraulic reciprocating driving mechanism 01, and a piston of the reciprocating driving mechanism 01 is connected with the bottom end of the second piston section 03 to drive the second piston section 03 and the first piston section 04 to reciprocate in the first piston cavity 021 and the second piston cavity 022. The first piston section 04 and the first piston cavity 021 are matched to form a plunger structure, and the second piston section 03 and the second piston cavity are matched to form a plunger structure; the cross-sectional area of the first piston section 04 is smaller than the cross-sectional area of the second piston section 03, and the first piston section 04 exits from the first piston chamber 021 and enters the second piston chamber 022. When the switching mechanism is at the initial position and the second unidirectional liquid inlet 0221 is functioning as a unidirectional valve normally, the first piston cavity 021 and the second piston cavity 022 both perform pumping action, and the effective areas of the first piston section 04 and the second piston section 03 are the sectional areas of the second piston section 03; when the switching mechanism is switched, the second unidirectional liquid inlet 0221 is in a normally open state of bidirectional conduction, the first piston cavity 021 generates pumping action, the second piston cavity 022 does not generate pumping pressure because the second unidirectional liquid inlet 0221 is in bidirectional conduction, and the effective areas of the first piston section 04 and the second piston section 03 are the sectional areas of the first piston section 04. The liquid outlet pipe 05 is connected with a safety valve 052.
Further, as shown in fig. 4 to 5, as a specific embodiment of the high-low pressure well testing pump provided by the present invention, the second unidirectional liquid inlet 0221 includes: a liquid inlet 074 communicated between the second piston chamber 022 and the liquid inlet pipe 06, a limiting plate 072 fixed in the liquid inlet 074, a valve cover 071 movably arranged in the liquid inlet 074 and a sealing limiting ring 073 fixed in the liquid inlet 074; in the direction of conduction of the inlet 074, the limiting plate 072 is located on the side of the valve cap 071 facing the second piston chamber 022, and the sealing limiting ring 073 is located on the side of the valve cap 071 facing the inlet pipe 06 and is used for sealing engagement with the valve cap 071. Specifically, the second unidirectional liquid inlet 0221 adopts a valve cap type unidirectional valve. The inner end of the liquid inlet 074 is communicated with the second piston cavity 022, and the outer end is communicated with the liquid inlet pipe 06. The valve cover 071 is located in the liquid inlet 074, and the limiting plate 072 and the sealing limiting ring 073 are respectively located at two sides of the valve cover 071 to limit the position of the valve cover 071. The limiting plate 072 can be a net-shaped or a clamping block structure arranged on the side wall of the liquid inlet 074; when the liquid in the second piston cavity 022 flows outwards through the liquid inlet hole 074, the limiting plate 072 is pressed on the sealing limiting ring 073 to form sealing; when the liquid flows into the second piston chamber 022 through the liquid inlet hole 074, the limiting plate 072 is separated from the sealing limiting ring 073, and the liquid flows into the second piston chamber 022 through a gap between the limiting plate 072 and the sealing limiting ring 073.
Further, as shown in fig. 9, as a specific embodiment of the high-low pressure well testing pump provided by the present invention, the switching mechanism includes a rotating shaft 081 hinged to the liquid inlet pipe 06, a base 082 provided in the liquid inlet pipe 06 and provided with a guiding hole, and a push rod 083 penetrating through the guiding hole; one end of the rotating shaft 081 penetrates into the liquid inlet pipe 06, and an eccentric wheel 084 is arranged on the end part of the rotating shaft 081 penetrating into the liquid inlet pipe 06; one end of the push rod 083 abuts against the outer edge of the eccentric wheel 084, and the other end abuts against the second unidirectional liquid inlet 0221. Specifically, the base 082 is connected to the side wall of the liquid inlet pipe 06, and is opposite to the liquid inlet 074 of the second unidirectional liquid inlet 0221, the guide hole on the base 082 is aligned with the valve cover 071 of the second unidirectional liquid inlet 0221, the push rod 083 penetrates into the guide hole, and the top end of the push rod 083 abuts against the valve cover 071 of the second unidirectional liquid inlet 0221. One end of the rotating shaft 081 penetrates into the liquid inlet pipe 06 from the outside of the liquid inlet pipe 06, and an eccentric wheel 084 is arranged at one end of the rotating shaft 081 penetrating into the liquid inlet pipe 06, and the bottom end of the push rod 083 abuts against the outer edge of the eccentric wheel 084. Rotating the rotating shaft 081 drives the eccentric wheel 084, the eccentric wheel 084 can push the bottom end of the push rod 083, and the valve cover 071 of the second unidirectional liquid inlet 0221 is separated from the sealing limiting ring 073. Further, a handle 085 is attached to one end of the shaft 081 located outside the inlet pipe 06.
Further, as shown in fig. 4, as a specific embodiment of the high-low pressure well testing pump provided by the invention, the first piston cavity 021 is in clearance fit with the first piston section 04, and a first sealing ring 091 in sliding sealing fit with the first piston section 04 is arranged between the first piston cavity 021 and the second piston cavity 022. Specifically, there is a certain clearance between first piston chamber 021 and first piston section 04, avoids direct contact, increase of service life. The first sealing ring 091 is fixed between the first piston cavity 021 and the second piston cavity 022, so that the sealing between the first piston segment 04 and the first piston cavity 021 is ensured, and meanwhile, the fixing and sealing effects of the first sealing ring 091 are better, and the service life is longer.
Further, as shown in fig. 4, as a specific embodiment of the high-low pressure well testing pump provided by the invention, the second piston section 03 is in clearance fit with the second piston section 03, and a second sealing ring 092 in sliding sealing fit with the second piston section 03 is provided at the start end of the second piston chamber 022. Specifically, a certain gap exists between the second piston cavity 022 and the second piston section 03, so that direct contact is avoided, and the service life is prolonged. The second piston segment 03 is inserted from the starting end of the second piston chamber 022, and the second sealing ring 092 is fixed at the starting end of the second piston chamber 022, so that the sealing between the second piston segment 03 and the second piston chamber 022 is guaranteed, meanwhile, the fixing sealing effect of the second sealing ring 092 is better, and the service life is longer.
Further, as shown in fig. 1, 2, 4 and 6, as a specific embodiment of the high-low pressure well testing pump provided by the invention, the front end and the rear end of the reciprocating driving mechanism 01 are respectively provided with a driving end; the pumping mechanism is provided with two pumping mechanisms and is respectively connected with the front end and the rear end of the reciprocating driving mechanism 01. Specifically, the reciprocating driving mechanism 01 adopts a hydraulic reciprocating driving mechanism 01, and both ends of a piston of the hydraulic reciprocating driving mechanism are provided with connecting rods 6 to form a driving end for driving. Two pumping mechanisms are installed at the front end and the rear end of the reciprocating driving mechanism 01 in a mirror image mode. The second piston section 03 of the pumping mechanism positioned at the front end of the reciprocating driving mechanism 01 is connected with the front end of the piston of the reciprocating driving mechanism 01; the second piston section 03 of the pumping mechanism positioned at the rear end of the reciprocating driving mechanism 01 is connected with the rear end of the piston of the reciprocating driving mechanism 01.
Further, as shown in fig. 6 to 8, as a specific embodiment of the high-low pressure well test pump provided by the present invention, the reciprocating driving mechanism 01 includes:
the hydraulic cylinder is provided with a power fluid inlet 11 and a power fluid outlet 12, the inner cavity of the hydraulic cylinder comprises a power section 13 and a liquid return section 14 which are communicated with each other and are parallel to each other in axis, and the sectional area of the power section 13 is larger than the sectional area of the liquid return section 14; and
the piston is arranged in the inner cavity of the hydraulic cylinder, the piston comprises a separation part 21, a main body part 22 and a power part 23 which are sequentially connected from front to back, the sectional area of the power part 23 is larger than that of the separation part 21, the separation part 21 is in sliding sealing fit with the liquid return section 14, the power part 23 is in sliding sealing fit with the power section 13, the separation part 21 and the power part 23 sequentially divide the inner cavity of the hydraulic cylinder into a liquid return cavity 31, a back cavity 32 and a forward cavity 33 from front to back, the power liquid inlet 11 is communicated with the back cavity 32, the power liquid outlet 12 is communicated with the forward cavity 33, and an inertia valve 4 used for enabling the forward cavity 33 to be communicated with the liquid return cavity 31 or enabling the forward cavity 33 to be communicated with the back cavity 32 is arranged on the piston.
Specifically, the hydraulic cylinder is formed by casting processing, and the inner cavity of the hydraulic cylinder is provided with a power section 13 and a liquid return section 14 which are cylindrical and coaxially arranged. The diameter of the power section 13 is larger than that of the liquid return section 14, and the diameter difference between the power section 13 and the liquid return section 14 can be directly processed in a hydraulic cylinder; it is also possible to first process a cylindrical hole in the hydraulic cylinder and then arrange a cylinder sleeve 16 in the processed hole to realize the diameter difference between the power section 13 and the liquid return section 14. The piston reciprocates in the inner cavity of the hydraulic cylinder, the piston comprises three sections of separating parts 21, a main body part 22 and a power part 23 which are cylindrical and coaxially arranged, the diameter of the power part 23 is larger than that of the separating parts 21, and the diameter of the separating parts 21 is larger than that of the main body part 22. An inertia valve 4 is provided on the piston, and the inertia valve 4 is used to communicate the advance chamber 33 with the return chamber 31 or the retreat chamber 32. When the piston moves forward, the inertia valve 4 communicates the forward cavity 33 with the backward cavity 32, simultaneously cuts off the forward cavity 33 from the liquid return cavity 31, hydraulic oil enters the backward cavity 32 from the power liquid inlet 11 and then enters the forward cavity 33, high pressure is formed in the backward cavity 32 and the forward cavity 33, and the hydraulic oil in the forward cavity 33 pushes the power part 23 to enable the piston to move forward in the inner cavity of the hydraulic cylinder due to the fact that the diameter of the separation part 21 is smaller than the diameter of the power part 23, and the hydraulic oil in the liquid return cavity 31 is discharged from the power liquid outlet 12. After the piston moves forward to the front end of the inner cavity of the hydraulic cylinder, the inertia valve 4 is switched due to self inertia, and the piston starts to move backwards. After the inertia valve 4 is switched, the inertia valve 4 blocks the forward cavity 33 from the backward cavity 32, simultaneously communicates the forward cavity 33 with the backward cavity 31, hydraulic oil enters the backward cavity 32 from the power fluid inlet 11, high pressure is formed in the backward cavity 32, so that the hydraulic oil pushes the piston to move backwards, the hydraulic oil in the forward cavity 33 flows into the backward cavity 31, and then is discharged from the power fluid outlet 12.
Further, as shown in fig. 6, as a specific embodiment of the ultra-high pressure water pump provided by the invention, the hydraulic cylinder comprises a tubular cylinder body 15 with two open ends, a tubular cylinder sleeve 16 arranged in the inner cavity of the cylinder body 15, and a cover part 17 covered at two ends of the cylinder body 15; the middle shaft of the cylinder sleeve 16 is coaxially arranged with the middle shaft of the inner cavity of the cylinder body 15; the power fluid inlet 11 and the power fluid outlet 12 are arranged on the side wall of the cylinder body 15, and the cylinder sleeve 16 is positioned between the power fluid inlet 11 and the power fluid outlet 12; the cover 17 is provided with a through hole having a sealing structure. The tubular cylinder body 15 and the cover parts 17 at both ends are assembled into a hydraulic cylinder for easy processing and installation. The inner cavity of the cylinder sleeve 16 forms a liquid return section 14 which is matched with a separation part 21 of the piston, and the part of the inner cavity of the hydraulic cylinder, which is not provided with the cylinder sleeve 16, forms a power section 13 which is matched with a power part 23 of the piston. The cover 17 is provided with a through hole for passing through the link 6 of the plunger pump unit, and a sealing structure is sealed between the link 6 and the through hole of the cover 17.
Further, as shown in fig. 6 to 8, as a specific embodiment of the high-low pressure well testing pump provided by the present invention, the inertia valve 4 includes a valve cavity, an inertia valve core located in the valve cavity and used for reciprocating in the piston movement direction, and a guiding mechanism for guiding the inertia valve core in the piston movement direction;
the valve cavity comprises a front end conduction ring groove 44, a front end step cylindrical section 41, a cylindrical communication section 42, a rear end step cylindrical section 43 and a rear end conduction ring groove 45 which are coaxially arranged and are communicated sequentially from front to back; the front end of the front end step cylindrical section 41 is communicated with the opening inside the front end conducting ring groove 44, and the diameter of the front end step cylindrical section 41 is larger than that of the communicating section 42; the rear end of the rear end step cylindrical section 43 is communicated with the opening at the inner side of the rear end conduction ring groove 45, and the diameter of the rear end step cylindrical section 43 is smaller than the outer diameter of the rear end conduction ring groove 45; the front end conduction ring groove 44 is communicated with the liquid return cavity 31 through a liquid return pipe 71, the rear end conduction ring groove 45 is communicated with the rear cavity 32 through a rear pipe 73, and the communicating section 42 is communicated with the front cavity 33 through a front pipe 72;
the front end seal portion includes: the outer side surface is used for sealing a circular pipe-shaped front end sealing section 81 which is opened at the inner side of the front end conduction ring groove 44 and a front end sealing section 47 which is used for being in sealing fit with the front end step cylindrical section 41;
the rear end seal portion includes: a cylindrical rear end blocking section 82 with a side surface for blocking the opening inside the rear end conduction ring groove 45 and a rear end sealing section 48 for sealing fit with the rear end step cylindrical section 43;
the front end plugging section 81, the front end sealing section 47, the connecting portion 46, the rear end sealing section 48 and the rear end plugging section 82 are connected in order from front to back;
a conduction gap is formed between the communication section 42 and the connection portion 46, and the length of the communication section 42 is smaller than the length of the connection portion 46.
The outer side surface of the front end plugging section 81 plugs the opening at the inner side of the front end conduction ring groove 44, so that the water flow pressure in the front end conduction ring groove 44 acts on the front end plugging section 81 along the radial direction, and the inertia valve core is not driven to move back and forth in the valve cavity. The side surface of the rear end plugging section 82 is used for plugging the opening at the inner side of the rear end conduction ring groove 45, so that the water flow pressure in the rear end conduction ring groove 45 acts on the rear end plugging section 82 along the radial direction, and the inertia valve core is not driven to move back and forth in the valve cavity.
Specifically, the valve chamber is sequentially communicated from front to back and is coaxially provided with a front end conduction ring groove 44, a front end stepped cylindrical section 41, a cylindrical communication section 42, a rear end stepped cylindrical section 43 and a rear end conduction ring groove 45. The front end conducting ring groove 44 is annular, is open on the inner side and is communicated with the front end step cylindrical section 41. The front stepped cylindrical section 41 includes two coaxial cylindrical cavities of different diameters, the side walls being stepped. The communication section 42 is cylindrical, the rear-end stepped cylindrical section 43 includes two coaxial cylindrical cavities of different diameters, and the side wall forms a stepped shape. The rear end conduction ring groove 45 is annular, is open on the inner side and is communicated with the rear end step cylindrical section 43. The front end conduction ring groove 44, the front end step cylindrical section 41, the cylindrical communication section 42, the rear end step cylindrical section 43 and the rear end conduction ring groove 45 are processed in the piston through a numerical control machine tool. The inertia valve core is coaxially provided with a front end plugging section 81 in a round tube shape, a front end sealing section 47 in a stepped cylindrical shape, a cylindrical connecting part 46, a rear end sealing section 48 in a stepped cylindrical shape and a rear end plugging section 82 in a cylindrical shape from front to back in sequence. The length of the communication section 42 is smaller than the length of the connecting portion 46, so that the inertia valve core can move back and forth in the valve cavity.
When the inertia valve 4 is at the initial position, the front end plugging section 81 is inserted into the front end conduction ring groove 44 to plug the inner opening of the front end conduction ring groove 44, and meanwhile, the front end sealing section 47 is inserted into the front end stepped cylindrical section 41 to limit the movement position of the inertia valve core in the front-back direction in the valve cavity, and the front end conduction ring groove 44 can be further separated from the conduction gap; the front end blocking section 81 and the front end sealing section 47 block the liquid return pipe 71 from the conduction gap. The rear end plugging section 82 is drawn out from the rear end conduction ring groove 45, and simultaneously the rear end sealing section 48 is separated from the rear end step cylindrical section 43, so that the inner side opening of the rear end conduction ring groove 45 is opened and communicated with the conduction gap; the retreating pipe 73 communicates with the conduction gap through the rear-end stepped cylindrical section 43 and the rear-end conduction ring groove 45.
After the inertia valve 4 is switched, the front end plugging section 81 is drawn out from the front end conduction ring groove 44, and the front end sealing section 47 is separated from the front end step cylindrical section 41, so that the inner opening of the front end conduction ring groove 44 is opened to communicate with the conduction gap, and the liquid return pipe 71 is communicated with the conduction gap through the front end conduction ring groove 44 and the front end step cylindrical section 41. The rear end plugging section 82 is inserted into the rear end conduction ring groove 45 to plug the inner side opening of the rear end conduction ring groove 45, and meanwhile, the rear end sealing section 48 is inserted into the rear end stepped cylindrical section 41 to limit the movement position of the inertia valve core in the front-rear direction in the valve cavity, and the rear end conduction ring groove 45 can be further separated from the conduction gap; the back end blocking section 82 and the back end sealing section 48 isolate the back pipe 73 from the conduction gap.
Further, as shown in fig. 6 to 8, as a specific embodiment of the high-low pressure well testing pump provided by the present invention, the guiding mechanism includes: an annular front end guide cavity 83 at the front end of the valve cavity and in sliding fit with the front end blocking section 81, and a cylindrical rear end guide cavity 84 at the rear end of the valve cavity and in sliding fit with the rear end blocking section 82.
The front end plugging section 81 and the rear end plugging section 82 play a guiding role, so that the structure is more compact. Specifically, the front end guide chamber 83 is a circular annular chamber coaxially arranged with the valve chamber, and the rear end guide chamber 84 is a cylindrical chamber coaxially arranged with the valve chamber. The front end plugging section 81 in a round tube shape is inserted into the front end guiding cavity 83 and guided in a sliding fit manner; the rear end guide part 82 is inserted into the rear end guide cavity 84 and guided in a sliding fit; so that the inertia valve core can move back and forth in the valve cavity.
Further, as shown in fig. 6 to 8, as a specific embodiment of the high-low pressure well testing pump provided by the present invention, a balance pipe 9 is provided on the piston, which communicates the liquid return chamber 31 with the advance chamber 33, a liquid return annular groove is provided on the front end surface of the partition portion 21, and the liquid return pipe 71 communicates with the liquid return annular groove; the rear end face of the power part 23 is provided with an advancing annular groove, and the advancing pipe 72 is communicated with the advancing annular groove; one end of the balance pipe 9 is communicated with the liquid return annular groove, and the other end is communicated with the advancing pipe 72. The balance pipe 9 ensures that the forward cavity 33 keeps a certain flow rate to the liquid return cavity 31, and prevents the hydraulic equipment for providing power liquid from being damaged due to overlarge pressure in the forward cavity 33 after the balance valve is damaged or the piston is blocked. The liquid return annular groove is a circular groove surrounding the axis of the partition part 21, and plays a role in guiding the power liquid, so that the pressure of the power liquid is ensured to uniformly act on the front end surface of the partition part 21; the forward annular groove is an annular groove surrounding the axis of the power part 23, and plays a role in guiding the power liquid, so that the pressure of the power liquid is ensured to uniformly act on the rear end face of the power part 23.
The technical features not specifically described in the above embodiments may be the same as those in other embodiments.
The positional concepts such as "upper" and "lower" mentioned in the above description of the embodiments should be understood as positional relationships of the embodiments of the present invention in a conventional state, which are merely for clarity of description of the embodiments, and should not be construed as limiting the present invention.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A high and low pressure well test pump, comprising: a reciprocating driving mechanism (01) and a water pumping mechanism driven by the reciprocating driving mechanism (01); the pumping mechanism comprises:
the reciprocating driving mechanism comprises a pump body (02) connected with the reciprocating driving mechanism (01), wherein a first piston cavity (021) and a second piston cavity (022) which are communicated with each other and are parallel to each other in the axial line are arranged in the pump body (02), a first one-way liquid inlet (0211) and a first one-way liquid outlet (0212) are arranged on the outer side of the first piston cavity (021), and a second one-way liquid inlet (0221) and a second one-way liquid outlet (0222) are arranged on the outer side of the second piston cavity (022);
the reciprocating driving mechanism (01) is connected with a second piston section (03), and the second piston section (03) is in sliding sealing fit with the second piston cavity (022);
the top end of the second piston section (03) is connected with a first piston section (04), the first piston section (04) is in sliding sealing fit with the first piston cavity (021), and the sectional area of the first piston section (04) is smaller than that of the second piston section (03);
a liquid outlet pipe (05) which is arranged on the pump body (02) and provided with a main liquid outlet (051) is respectively communicated with the first unidirectional liquid outlet (0212) and the second unidirectional liquid outlet (0222); and
a liquid inlet pipe (06) which is arranged on the pump body (02) and provided with a main liquid inlet (061) is respectively communicated with the first unidirectional liquid inlet (0211) and the second unidirectional liquid inlet (0221), and a switching mechanism for placing the second unidirectional liquid inlet (0221) into bidirectional conduction is arranged in the liquid inlet pipe (06);
the switching mechanism comprises a rotating shaft (081) hinged to the liquid inlet pipe (06), a base (082) arranged in the liquid inlet pipe (06) and provided with a guide hole, and a push rod (083) penetrating through the guide hole; one end of the rotating shaft (081) penetrates into the liquid inlet pipe (06), and an eccentric wheel (084) is arranged on the end part of the rotating shaft (081) penetrating into the liquid inlet pipe (06); one end of the push rod (083) is propped against the outer edge of the eccentric wheel (084), and the other end of the push rod is propped against the second unidirectional liquid inlet (0221);
the front end and the rear end of the reciprocating driving mechanism (01) are respectively provided with a driving end; the pumping mechanism is provided with two front ends and rear ends which are respectively connected with the reciprocating driving mechanism (01).
2. The high and low pressure well test pump of claim 1, wherein: the second unidirectional liquid inlet (0221) comprises: a liquid inlet hole (074) communicated between the second piston cavity (022) and the liquid inlet pipe (06), a limiting plate (072) fixed in the liquid inlet hole (074), a valve cover (071) movably arranged in the liquid inlet hole (074) and a sealing limiting ring (073) fixed in the liquid inlet hole (074); in the conduction direction of the liquid inlet hole (074), the limiting plate (072) is located on one side of the valve cover (071) facing the second piston cavity (022), and the sealing limiting ring (073) is located on one side of the valve cover (071) facing the liquid inlet pipe (06) and is used for being in sealing fit with the valve cover (071).
3. The high and low pressure well test pump of claim 1, wherein: the first piston cavity (021) is in clearance fit with the first piston section (04), and a first sealing ring (091) in sliding sealing fit with the first piston section (04) is arranged at the communication part of the first piston cavity (021) and the second piston cavity (022).
4. The high and low pressure well test pump of claim 1, wherein: the second piston section (03) is in clearance fit with the second piston section (03), and a second sealing ring (092) in sliding sealing fit with the second piston section (03) is arranged at the starting end of the second piston cavity (022).
5. The high and low pressure well test pump of any one of claims 1-4, wherein: the reciprocation drive mechanism (01) includes:
the hydraulic cylinder is provided with a power fluid inlet (11) and a power fluid outlet (12), wherein the inner cavity of the hydraulic cylinder comprises a power section (13) and a liquid return section (14) which are communicated with each other and are parallel to each other in axis, and the sectional area of the power section (13) is larger than the sectional area of the liquid return section (14); and
the piston in the inner cavity of the hydraulic cylinder comprises a separation part (21), a main body part (22) and a power part (23) which are sequentially connected from front to back, the cross section of the power part (23) is larger than that of the separation part (21), the separation part (21) is in sliding sealing fit with the liquid return section (14), the power part (23) is in sliding sealing fit with the power section (13), the separation part (21) and the power part (23) divide the inner cavity of the hydraulic cylinder into a liquid return cavity (31), a back cavity (32) and a front cavity (33) from front to back in sequence, the power liquid inlet (11) is communicated with the back cavity (32), the power liquid outlet (12) is communicated with the front cavity (33), and an inertia valve (4) used for enabling the front cavity (33) to be communicated with the liquid return cavity (31) or enabling the front cavity (33) to be communicated with the back cavity (32) is arranged on the piston.
6. The high and low pressure well test pump of claim 5, wherein: the inertia valve (4) comprises a valve cavity, an inertia valve core which is positioned in the valve cavity and reciprocates in the piston movement direction, and a guide mechanism for guiding the inertia valve core in the piston movement direction;
the valve cavity comprises a front end conduction ring groove (44), a front end step cylindrical section (41), a cylindrical communication section (42), a rear end step cylindrical section (43) and a rear end conduction ring groove (45) which are coaxially arranged and sequentially communicated from front to back; the front end of the front end step cylindrical section (41) is communicated with an opening at the inner side of the front end conduction ring groove (44), and the diameter of the front end step cylindrical section (41) is larger than that of the communicating section (42); the rear end of the rear end step cylindrical section (43) is communicated with an opening at the inner side of the rear end conduction ring groove (45), and the diameter of the rear end step cylindrical section (43) is smaller than the outer diameter of the rear end conduction ring groove (45); the front end conduction ring groove (44) is communicated with the liquid return cavity (31) through a liquid return pipe (71), the rear end conduction ring groove (45) is communicated with the backward cavity (32) through a backward pipe (73), and the communication section (42) is communicated with the forward cavity (33) through a forward pipe (72);
the front end sealing part includes: the outer side surface is used for sealing a circular pipe-shaped front end sealing section (81) of the inner side opening of the front end conduction ring groove (44) and a front end sealing section (47) used for being in sealing fit with the front end step cylindrical section (41);
the rear end seal portion includes: a cylindrical rear end blocking section (82) with a side surface for blocking an opening at the inner side of the rear end conduction ring groove (45) and a rear end sealing section (48) for sealing fit with the rear end step cylindrical section (43);
the front end plugging section (81), the front end sealing section (47), the connecting part (46), the rear end sealing section (48) and the rear end plugging section (82) are sequentially connected from front to back;
a conduction gap is formed between the communication section (42) and the connecting part (46), and the length of the communication section (42) is smaller than that of the connecting part (46).
7. The high and low pressure well test pump of claim 6, wherein: the guide mechanism includes: an annular front end guide cavity (83) positioned at the front end of the valve cavity and in sliding fit with the front end plugging section (81), and a cylindrical rear end guide cavity (84) positioned at the rear end of the valve cavity and in sliding fit with the rear end plugging section (82).
8. The high and low pressure well test pump of claim 6, wherein: the piston is provided with a balance pipe (9) which is communicated with the liquid return cavity (31) and the advancing cavity (33), the front end surface of the separation part (21) is provided with a liquid return annular groove, and the liquid return pipe (71) is communicated with the liquid return annular groove; the rear end face of the power part (23) is provided with an advancing annular groove, and the advancing pipe (72) is communicated with the advancing annular groove; one end of the balance pipe (9) is communicated with the liquid return annular groove, and the other end of the balance pipe is communicated with the advancing pipe (72).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764849.XA CN107387357B (en) | 2017-08-30 | 2017-08-30 | High-low pressure well testing pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764849.XA CN107387357B (en) | 2017-08-30 | 2017-08-30 | High-low pressure well testing pump |
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| CN107387357A CN107387357A (en) | 2017-11-24 |
| CN107387357B true CN107387357B (en) | 2023-08-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409349Y (en) * | 2000-02-17 | 2000-12-06 | 韩云吉 | High-displacement automatic reversing horizontal double-cylinder plunger pump |
| CN102536925A (en) * | 2012-01-05 | 2012-07-04 | 解始建 | Hydraulic automatic reciprocating booster |
| CN203892134U (en) * | 2013-06-08 | 2014-10-22 | 张晔 | Piston type refrigeration compressor |
| CN204804795U (en) * | 2015-05-18 | 2015-11-25 | 中国石油大学(华东) | Energy -conserving water injection supercharging equipment of two effects of oil well |
| CN207297252U (en) * | 2017-08-30 | 2018-05-01 | 张家口德中钻探机械有限责任公司 | High-low pressure well testing pumps |
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2017
- 2017-08-30 CN CN201710764849.XA patent/CN107387357B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409349Y (en) * | 2000-02-17 | 2000-12-06 | 韩云吉 | High-displacement automatic reversing horizontal double-cylinder plunger pump |
| CN102536925A (en) * | 2012-01-05 | 2012-07-04 | 解始建 | Hydraulic automatic reciprocating booster |
| CN203892134U (en) * | 2013-06-08 | 2014-10-22 | 张晔 | Piston type refrigeration compressor |
| CN204804795U (en) * | 2015-05-18 | 2015-11-25 | 中国石油大学(华东) | Energy -conserving water injection supercharging equipment of two effects of oil well |
| CN207297252U (en) * | 2017-08-30 | 2018-05-01 | 张家口德中钻探机械有限责任公司 | High-low pressure well testing pumps |
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| CN107387357A (en) | 2017-11-24 |
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Effective date of registration: 20230824 Address after: 076250 Zone 210/B, 2nd Floor, Building B, Enterprise Incubation Building, No. 8 Shenkong Road, High tech Industrial Development Zone, Zhangjiakou City, Hebei Province Patentee after: Zhangjiakou Yixian Technology Engineering Co.,Ltd. Address before: No. 1, Fuqiang Road, Xishi Industrial Cluster District, Zhangjiakou City, Hebei Province, 076250 Patentee before: ZHANGJIAKOU DEZHONG DRILLING MACHINERY CO.,LTD. |
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