Performance testing mechanism for reciprocating pump

Abstract

The utility model discloses a reciprocating pump performance testing mechanism, and belongs to the technical field of petroleum drilling and production equipment. Comprising a driving device, at least three fixed manifolds with different bearing pressures, a movable manifold, a low-pressure manifold, a cooling unit, a circulating water tank and a suction manifold, the driving device is used for driving the reciprocating pump; the movable manifold is connected with a discharge port of a reciprocating pump to be tested, and the movable manifold can be communicated with the input end of any one of the fixed manifolds; the output end of each fixed manifold is communicated with the inlet of the cooling unit through a low-pressure manifold; an outlet of the cooling unit communicates with the circulating water tank; and the other end of the suction manifold is communicated with a suction inlet of the reciprocating pump. According to the utility model, the simulation test of different working environments of reciprocating pumps of different models can be realized under a simple structure, and the maximum test pressure can reach 140MPa, so that the test requirements of various reciprocating pumps can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pump performance test mechanism, specifically is a reciprocating pump performance test mechanism, belongs to petroleum drilling and production equipment technical field. BACKGROUND

[0002] Reciprocating pump is through the reciprocating movement of piston directly to the liquid with pressure energy form to provide energy delivery machinery. Reciprocating pump is widely used in petroleum drilling, acidification fracturing, water injection and other production in petroleum mine. With the increasing demand of petroleum industry to reciprocating pump, reciprocating pump is developing towards high output pressure, large flow, convenient manufacture and maintenance, small flow pressure pulsation, small volume and weight. The output of China's reciprocating pump industry exceeds 460 million, and the consumption exceeds 418 million, and it grows by about 10% to 15% per year.

[0003] Reciprocating pump performance test is directly related to the working efficiency, stability, service life and many parameters after production. The existing reciprocating pump test system is basically complex structure, low test efficiency, large test result error, and cannot meet the current reciprocating pump test demand. SUMMARY

[0004] The utility model solves the technical problem in overcome prior art defects, provide a reciprocating pump performance test mechanism with simple structure, high test efficiency, accurate and reliable test result.

[0005] In order to solve the above technical problem, the utility model provides a reciprocating pump performance test mechanism, including drive arrangement, at least three ways of bearing pressure different fixed manifold, movable manifold, low pressure manifold, cooling unit, circulating water tank and suction manifold;

[0006] The drive arrangement is used to drive reciprocating pump;

[0007] The movable manifold is connected with the discharge port of the reciprocating pump to be tested, and the input end of any one of the fixed manifolds can be communicated with the movable manifold.

[0008] The output end of each fixed manifold is communicated with the inlet of cooling unit through low pressure manifold;

[0009] The outlet of cooling unit is communicated with circulating water tank;

[0010] One end of suction manifold is communicated with circulating water tank, and the other end is communicated with the suction inlet of reciprocating pump.

[0011] In the utility model, the fixed manifold includes high pressure manifold, low pressure manifold and medium pressure manifold;

[0012] The high pressure manifold, low pressure manifold, medium pressure manifold and low pressure manifold are all installed with pressure retaining valve group for adjusting the pressure of circulating medium.

[0013] The pressure valve group comprises a plurality of mutually-communicating adjusting valves with different bearing pressures, and pressure transmitters for pre-valve pressure monitoring and overpressure protection are respectively connected between adjacent adjusting valves.

[0014] The low-pressure manifold comprises two parallelly-arranged steady-pressure pipe sections; the inlets of the steady-pressure pipe sections are connected to the fixed manifold, and the outlets are connected to cooling units.

[0015] The steady-pressure pipe sections are respectively provided with first electromagnetic flowmeters and first electric gate valves, and the first electromagnetic flowmeters are located between the first electric gate valves and the cooling units.

[0016] The suction manifold comprises two perfusion pumps, a circulation pipeline, a second electric gate valve, a third electric gate valve and a second electromagnetic flowmeter; one end of each of the two perfusion pumps is connected to a circulating water tank via the second electric gate valve, and the other end of each of the two perfusion pumps is connected to the second electromagnetic flowmeter via the third electric gate valve.

[0017] One end of the circulation pipeline is connected to the circulating water tank, and the other end is connected to a pipeline between the third electric gate valve and the second electromagnetic flowmeter; the circulation pipeline is provided with a fourth electric gate valve.

[0018] The pipeline between the third electric gate valve and the reciprocating pump is sequentially provided with the second electromagnetic flowmeter, a fifth electric gate valve and a temperature transmitter.

[0019] The circulating water tank is composed of a plurality of mutually-communicating independent tanks and is used for over-storage of circulating medium.

[0020] The driving device comprises a DC motor, a transmission and a torque and speed sensor; the DC motor is connected to the transmission, and the transmission is connected to the reciprocating pump; a torque and speed sensor is arranged between the transmission and the reciprocating pump and is used for measuring the input speed and input torque of the reciprocating pump.

[0021] The driving device comprises a DC motor, a shaft coupling and a torque and speed sensor; the DC motor is connected to the reciprocating pump via the shaft coupling; a torque and speed sensor is arranged between the DC motor and the reciprocating pump and is used for measuring the input speed and input torque of the reciprocating pump.

[0022] The cooling unit is a plate-type air cooler.

[0023] The utility model beneficial effect lies in: (1) through at least three way load pressure different fixed manifold cooperation movable manifold, low pressure manifold, cooling unit, circulating water tank and suction manifold, can realize the simulation test of different working environment of different model reciprocating pump under simple structure, and the test pressure can reach 140MPa, thereby can satisfy the test demand of various reciprocating pump, (2) can according to test different working condition, complete test test with the most energy -conserving mode, and can dynamically control test parameter in the test process, greatly improve test efficiency, (3) the output end of high pressure manifold, the output end of medium pressure manifold and low pressure manifold are equipped with the pressure -holding valve group for adjusting circulating medium pressure, can set different test pressure according to the need, (4) low pressure manifold adopts two steady -pressure pipe sections of parallel arrangement, one way goes to big flow, one way goes to small flow, to improve flow measurement accuracy, (4) suction manifold can realize reciprocating pump self -priming test quickly, and through electric gate valve carries out quick switching, convenient and efficient, (5) can dynamically select transmission or coupling to realize different power transmission test according to the need, can increase mechanism to meet the test need of different reciprocating pump, (6) cooling unit adopts plate type air cooler and can greatly accelerate the cooling speed of circulating medium, so that the circulating medium temperature can be kept below 50 DEG C, and then improve the reciprocating pump full load operation time length. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0025] Figure 1 It is reciprocating pump performance test mechanism schematic view;

[0026] Figure 2 It is pressure -holding valve group structure schematic view. EMBODIMENT

[0027] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will combine the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0029] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0033] Some embodiments of the application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] As Figure 1As shown, the technical scheme of the utility model will be further explained in detail below by using a reciprocating pump performance testing mechanism for oil field. The reciprocating pump performance testing mechanism for oil field provided in the embodiment comprises a DC motor, a transmission, a torque and rotating speed sensor, a high-pressure manifold, a pressure holding valve group, a low-pressure manifold, a plate air cooler, a circulating water tank and a suction manifold.

[0035] In the embodiment, the output shaft of the DC motor is connected with the transmission, and the end of the transmission is connected with the input shaft of the power end of the reciprocating pump to be tested through a half-tooth flange. In the embodiment, 750kW, 1600kW and 2000kW DC motors are matched as the power source of the testing system, and different specifications of motors can be matched according to the rated power of the testing object.

[0036] In the embodiment, the transmission adopts two 2000kW speed increasers, three 2000kW speed reducers and one gear transmission. In the two 2000kW speed increasers, one has a speed increasing ratio of 1:1.5 and an input rotating speed of 0r / min-1000r / min, and the other has a speed increasing ratio of 1:2.118 and an input rotating speed of 0r / min-1000r / min. In the three 2000kW speed reducers, two have a speed reducing ratio of 1.909:1 and an input rotating speed of 0r / min-1000r / min, and one has a speed reducing ratio of 1.423:1 and an input rotating speed of 350r / min-526r / min, which is used as a secondary speed reducing device. The gear transmission has a speed increasing ratio of 1:1.79 and a speed reducing ratio of 2.19:1, which is used as a backup.

[0037] In the embodiment, the transmission is provided with a special cooling and lubricating system to ensure the normal operation of the transmission.

[0038] The torque and rotating speed sensor is arranged between the transmission and the reciprocating pump to be tested, and is used for measuring the input rotating speed and input torque of the reciprocating pump. In the embodiment, several torque and rotating speed sensors of different specifications are matched and installed according to different testing objects, and the specific parameters are as follows: 1, the maximum load torque of DSTP-5000 is 5000kg.m, and the maximum rotating speed is 1500r / min; 2, the maximum load torque of JC4B is 50kN.m, and the maximum rotating speed is 2000r / min; 3, the maximum load torque of DSTP-2000 is 2000kg.m, and the maximum rotating speed is 2000r / min; 4, the maximum load torque of DSTP-1000 is 1000kg.m, and the maximum rotating speed is 1000r / min.

[0039] From the above configuration, it can be seen that it can be dynamically powered according to different test objects. If it is a drilling pump, by 1600kW and 2000kW DC motor master-slave and dynamic, the maximum power 3200kW can be realized. If the test object is a cementing pump, the maximum power 2000kW can be realized; if the reciprocating pump with rated power 2000kW requires test input speed 2000r / min, the speed increaser with speed ratio 1:2.118 can be connected to realize the maximum speed 2118r / min; if the reciprocating pump is in low speed and high torque condition, the reducer with speed ratio 1.909:1 can be connected, or even the second reducer with speed ratio 1.423:1 is installed to realize the maximum torque 136kN.m.

[0040] In the embodiment, the high-pressure manifold is divided into a fixed manifold and a movable manifold. The fixed manifold is divided into three paths, which are a 5" low-pressure pipeline (20MPa), a 4" pressure pipeline (70MPa) and a 2" high-pressure pipeline (140MPa), and is matched and installed according to different working conditions.

[0041] The movable manifold is provided with a 2" pipeline, an elbow, a 4" pipeline and an elbow. When testing low pressure, the 4" pipeline is assembled, and a 4-to-5" conversion joint is configured. When testing high pressure, the 2" pipeline is assembled, and a 4-to-2" conversion joint is configured.

[0042] One end of the movable pipeline is connected to the reciprocating pump to be tested, and the other end can be connected to the 5" low-pressure pipeline (20MPa), the 4" pressure pipeline (70MPa) and the 2" high-pressure pipeline (140MPa) respectively to realize the construction of different test environments. Since the back pressure of the pressure retaining valve group is large, when testing the no-load test of the reciprocating pump, the 5" pipeline needs to be connected.

[0043] In the embodiment, pressure transmitters P6, P9 and P10 are respectively arranged on the three fixed manifolds. The pressure transmitters P6, P9 and P10 respectively measure the 140MPa pressure, the 70MPa pressure and the 20MPa pressure discharged by the reciprocating pump.

[0044] As shown in Figure 2 The pressure retaining valve group is mainly used for adjusting the pressure of the circulating medium (clear water is used in the embodiment). In the embodiment, the pressure retaining valve group is assembled on the 2" and 4" high-pressure fixed manifolds. The pressure retaining valve group adopts a plurality of electrically adjusted valves which are connected to each other. The bearing pressures of the valves are different from each other and increase from small to large. The pressure transmitters are connected between adjacent valves respectively. The pressure transmitters are used for monitoring the pressure before the valve and overpressure protection. Figure 2 C1-C7 in the middle are electrically adjusted valves, and P1-P9 are pressure transmitters.

[0045] In this embodiment, a 4″ pressure-reducing valve assembly is used for larger flow rates and output pressures below 70MPa, while a 2″ pressure-reducing valve assembly is used for higher pressures. During no-load cycling, all regulating valves are fully open. During the step-by-step pressurization process, the electronic regulating valves gradually close in the order of C2, C3, etc. During the step-by-step closing process, the valve pressure must be kept below the valve pressure range shown in the figure. The pressures before and after the valves are monitored in real time by pressure transmitters P1 to P9 to ensure that the pressures before and after each electronic regulating valve are within the specified range. During the depressurization process, the action sequence of the electronic regulating valves is reversed.

[0046] like Figure 1 As shown, the low-pressure manifold in this implementation uses an atmospheric pressure pipeline. It is located downstream of the three high-pressure manifolds, merging into one. The low-pressure manifold includes two pressure-stabilizing sections, one for high flow and the other for low flow, to improve flow measurement accuracy. A temperature transmitter T1 is connected between the front end of the low-pressure manifold and the rear end of the three high-pressure manifolds; the temperature transmitter T1 measures the discharge temperature of the reciprocating pump. The two pressure-stabilizing sections are equipped with electromagnetic flowmeters F1 and F2, and electric gate valves SV1 and SV2, respectively. Electric gate valves SV1 and SV2 are used for switching pipelines. Back pressure must be provided at the end of the low-pressure manifold to ensure a full pipe condition during flow measurement.

[0047] In this embodiment, the end of the low-pressure manifold is connected to the inlet of the plate air cooler via a pipeline, and an electric gate valve SV3 is installed between the two. Since excessively high water temperatures (above 50°C) can damage the reciprocating pump seals, a plate air cooler is used in this embodiment to cool the circulating medium. Actual measurements show that when the plate air cooler is operating normally and the spray pump is on, the reciprocating pump (2000kW full load) can maintain the circulating medium temperature below 50°C for several hours.

[0048] In this embodiment, the circulating water tank consists of four 10m... 3 The system consists of a water tank for storing the circulating medium (clean water). One end of the circulating water tank is connected to the outlet of the plate air cooler, and the other end is injected into the suction manifold via a priming pump. The water tank is equipped with a drain port and a fill port for discharging and injecting the circulating medium (clean water).

[0049] The suction manifold includes two injection pumps, a circulation pipeline, and an electromagnetic flowmeter F3. The same end of each injection pump is connected to the circulating water tank via electric gate valves SV4 and SV6, respectively. The other ends of each injection pump are connected to the pipeline between the electromagnetic flowmeter F3 via electric gate valves SV5 and SV7, respectively. One end of the circulation pipeline is connected to the circulating water tank, and the other end is connected to electric gate valves SV5 and SV7 and the electromagnetic flowmeter F3. An electric gate valve SV8 is installed on the circulation pipeline.

[0050] In this embodiment, the flow rate of the injection pump is 300 m³ / h. 3 / h, head 50m, power 75kW, one for one spare, through SV4-SV7 switching.

[0051] Suction manifold is used for reciprocating pump self-suction test, through electric gate valve SV5, SV7, SV8 switching.

[0052] In this embodiment, electromagnetic flowmeter F3 is connected with reciprocating pump through metal hose, and electric gate valve SV9 and temperature transmitter T2 are sequentially arranged on the metal hose.

[0053] In this embodiment, a pressure transmitter P11 is arranged on the pipeline line in front of the inlet of the reciprocating pump, and the pressure transmitter P11 is used for measuring the suction pressure of the reciprocating pump, and the range is 1MPa.

[0054] In another embodiment, a shaft coupling is used instead of the speed changer in the foregoing embodiment, so as to be installed according to the test working condition, and the adaptability of the reciprocating pump performance test mechanism to the reciprocating pump is further improved.

[0055] The utility model provides a kind of reciprocating pump performance test mechanism's thought, the method and approach of specific implementation this technical scheme are many, above-mentioned only is the preferred implementation mode of the utility model, it should be pointed out, for the ordinary skilled in the art of this technology, under the premise of not departing from the principle of the utility model, still can make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.The unspecified components in this embodiment can be realized by prior art.

Claims

1. A reciprocating pump performance testing mechanism, characterized by: The device comprises a driving device, at least three fixed manifolds with different pressure, a movable manifold, a low-pressure manifold, a cooling unit, a circulating water tank and a suction manifold. The driving device is used to drive the reciprocating pump. The movable manifold is connected to the discharge port of the reciprocating pump to be tested, and can communicate with the input end of any one of the fixed manifolds. The output end of each fixed manifold is connected to the low-pressure manifold, and the low-pressure manifold is connected to the inlet of the cooling unit. The outlet of the cooling unit is connected to the circulating water tank. One end of the suction manifold is connected to the circulating water tank, and the other end is connected to the suction port of the reciprocating pump.

2. The reciprocating pump performance testing mechanism of claim 1, wherein: The fixed manifold comprises a high-pressure manifold, a low-pressure manifold and a medium-pressure manifold. The high-pressure manifold, the low-pressure manifold, the medium-pressure manifold and the low-pressure manifold are provided with a pressure retaining valve group for adjusting the pressure of the circulating medium.

3. The reciprocating pump performance testing mechanism of claim 2, wherein: The pressure retaining valve group comprises a plurality of adjusting valves which are connected to each other and bear different pressures, and the adjacent adjusting valves are respectively connected to pressure transmitters for monitoring the pressure before the valve and overpressure protection.

4. The reciprocating pump performance testing mechanism of any one of claims 1 to 3, wherein: The low-pressure manifold comprises two parallel stable pressure pipe sections; the inlet of the stable pressure pipe section is connected to the fixed manifold, and the outlet is connected to the cooling unit. The stable pressure pipe section is respectively provided with a first electromagnetic flowmeter and a first electrically operated gate valve, and the first electromagnetic flowmeter is located between the first electrically operated gate valve and the cooling unit.

5. The reciprocating pump performance testing mechanism of any one of claims 1 to 3, wherein: The suction manifold comprises two perfusion pumps, a circulating pipeline, a second electrically operated gate valve, a third electrically operated gate valve and a second electromagnetic flowmeter; one end of each of the two perfusion pumps is connected to the circulating water tank through the second electrically operated gate valve, and the other end is connected to the second electromagnetic flowmeter through the third electrically operated gate valve. One end of the circulating pipeline is connected to the circulating water tank, and the other end is connected to the pipeline between the third electrically operated gate valve and the second electromagnetic flowmeter; the circulating pipeline is provided with a fourth electrically operated gate valve.

6. The reciprocating pump performance testing mechanism of claim 5, wherein: The pipeline between the third electrically operated gate valve and the reciprocating pump is sequentially provided with a second electromagnetic flowmeter, a fifth electrically operated gate valve and a temperature transmitter.

7. The reciprocating pump performance testing mechanism of any one of claims 1 to 3, wherein: The circulating water tank is composed of a plurality of independent tanks which are connected to each other and used for over-storage of the circulating medium.

8. The reciprocating pump performance testing mechanism of any one of claims 1 to 3, wherein: The driving device comprises a DC motor, a speed changer and a torque and speed sensor; the DC motor is connected to the speed changer, and the speed changer is connected to the reciprocating pump; the speed changer and the reciprocating pump are provided with a torque and speed sensor for measuring the input speed and input torque of the reciprocating pump.

9. The reciprocating pump performance testing mechanism of any one of claims 1 to 3, wherein: The driving device comprises a DC motor, a shaft coupling and a torque and speed sensor; the DC motor is connected to the reciprocating pump through the shaft coupling; the DC motor and the reciprocating pump are provided with a torque and speed sensor for measuring the input speed and input torque of the reciprocating pump.

10. The reciprocating pump performance testing mechanism of any one of claims 1 to 3, wherein: The cooling unit is a plate air cooler.

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