Plunger pump piston packing leakage alarm device for oilfield water injection

Abstract

The utility model discloses a plunger pump piston packing leakage alarm device for oilfield water injection, which relates to the technical field of plunger pumps and comprises a water tank, a flow alarm device and a liquid level alarm device. The flow alarm device comprises a flow meter and a monitor, the flow meter is connected with a port of the drainage pipe, and the flow meter is in communication connection with the monitor; the liquid level alarm device is connected with the tank wall of the water containing tank, and the liquid level alarm device is in communication connection with the monitor. The flow meter is arranged, the leakage amount is accurately and quantitatively judged, and advanced alarm, advanced maintenance and quantitative monitoring are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plunger pump, concretely to a plunger pump piston packing leakage alarm device for oilfield water injection. BACKGROUND

[0002] At present, there are four main methods to monitor the plunger pump packing leakage: first, unattended water injection station mainly relies on camera manual monitoring, which cannot see the piston movement, water leakage and drainage condition in the plunger pump box; second, when manually inspecting, it is difficult to judge by the (60-150) drop / min standard to observe the plunger packing water drop or water leakage, which cannot be clearly seen through the drainage pipe into the drainage ditch; third, it is difficult to monitor the plunger pump outlet pressure and displacement by PCS, which changes slightly in the initial stage of plunger packing leakage; fourth, it is also difficult to achieve the monitoring purpose by monitoring the liquid level of the pump plunger pool when the packing leakage water level rises rapidly and the leakage occurs instantly. The above methods are found in the middle and after control, and cannot achieve the pre-control. In view of these deficiencies, an improved technical scheme is proposed.

[0003] Publication No.: CN218151361U discloses a plunger pump packing leakage detection device, which comprises a water collecting tank, a float ball switch connected to the water collecting tank, and a PLC control system connected to the float ball switch. The float ball switch comprises a sensing guide rod, which extends vertically downward in the water collecting tank, and a protective cover is arranged outside the sensing guide rod. An upper float ball, a middle float ball and a lower float ball are sequentially arranged from top to bottom outside the sensing guide rod. The upper float ball, the middle float ball and the lower float ball make fixed stroke rising and falling on the sensing guide rod. The upper float ball, the middle float ball and the lower float ball correspond to the high liquid level, the middle liquid level and the low liquid level of the liquid in the water collecting tank respectively.

[0004] The technical scheme is to connect the float ball switch with the PLC control system to judge the leakage condition. The patent does not have the functions of early warning, early maintenance and quantitative monitoring.

[0005] Publication No.: CN212838283U discloses a sealing packing failure monitoring device for plunger pump, which comprises a light beam emitting device and a light beam receiving device arranged on the opposite first groove wall and second groove wall of the sewage tank of the plunger pump respectively. When the plunger pump does not leak, the light beam receiving device can continuously receive the light beam signal emitted by the light beam emitting device. When the plunger pump leaks, the leaked liquid will block the transmission of the light beam signal, so that the light beam receiving device cannot receive the light beam signal. The light beam receiving device generates an electric signal according to the reception of the light beam signal and transmits it to the controller. The controller receives and controls the alarm device based on the electric signal, so that the staff can know the sealing failure of the sealing packing.

[0006] The technical scheme is to detect and alarm the leakage of the plunger pump by the light beam, and belongs to post-monitoring alarm.

[0007] CN109931255B discloses a plunger pump wear evaluation system and method based on leakage test and pump shell temperature test, which realizes change collection of test pump leakage and related information of pump shell temperature, so as to judge the wear of the pump. The wear evaluation system comprises a test plunger pump, an overflow valve, a measurement pressure gauge, a calibration pressure gauge, a flow meter, a thermometer and a flange plate. Compared with the prior art, the flow, temperature and pressure of the hydraulic system pipeline are collected by the present application to judge the wear degree and remaining service life of the test plunger pump, and make a spare part plan accordingly. Meanwhile, the differences in wear degree and deterioration speed of each pump can be compared to further investigate the design, manufacture, installation and maintenance of different hydraulic pumps, and provide data for system improvement and optimization.

[0008] The prior art is used for evaluating the plunger pump and cannot be applied to the field, and the patent does not have the functions of early warning, early maintenance and quantitative monitoring.

[0009] In summary, the technical solutions, technical problems to be solved and beneficial effects of the above disclosed technologies are different from those of the present application. The above disclosed technology documents do not have technical inspiration for more technical features, technical problems to be solved and beneficial effects of the present application. Utility model content

[0010] In view of the above defects of the prior art, the present application provides a plunger pump piston packing leakage alarm device for oilfield water injection.

[0011] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0012] A plunger pump piston packing leakage alarm device for oilfield water injection, comprising a water tank, a drain pipe is arranged at the bottom of the water tank, further comprising a flow alarm device and a liquid level alarm device; the flow alarm device comprises a flow meter and a monitor, the flow meter is connected with the port of the drain pipe, and the flow meter is in communication connection with the monitor; the liquid level alarm device is connected with the tank wall of the water tank, and the liquid level alarm device is in communication connection with the monitor.

[0013] Further, the flow meter is connected with a transmitter through a communication line, the transmitter is wirelessly connected with a base station, and the base station is connected with the monitor.

[0014] Further, the floating ball liquid level alarm device comprises a side-mounted floating ball liquid level switch, an electric connector of the side-mounted floating ball liquid level switch is embedded in a side wall of the water tank, a float of the side-mounted floating ball liquid level switch is arranged in the water tank, and the electric connector is connected with the sound-light alarm through an electric wire; and the electric connector is connected with the transmitter through a cable.

[0015] Further, the automatic packing cap tightening mechanism is further provided.

[0016] Specifically, the automatic packing cap tightening mechanism comprises a worm cap, a motor and a controller.

[0017] Specifically, a worm structure is arranged on an outer peripheral side wall of the packing cap of the plunger pump, i.e., the worm cap.

[0018] Specifically, an output shaft of the motor is connected with a worm through a shaft coupling, and the worm is engaged with a worm wheel of the worm cap.

[0019] Specifically, the motor is connected with the controller through a control line, and the controller is connected with the base station through a communication line.

[0020] Further, a camera is further provided, and the camera is connected with a monitor through a switch, and the base station is connected with the monitor through the switch.

[0021] Further, the flow meter is a micro gear flow meter, the monitor is a terminal monitoring computer, and the controller is a PLC controller.

[0022] Further, the drain pipe is a transparent pipe.

[0023] Further, the water tank is communicated with a drain hole in a bottom of the plunger pump through a water leakage pipe.

[0024] Further, a filter is arranged on the drain hole in the bottom of the water tank.

[0025] Further, an outlet of the flow meter is provided with a drain tail pipe, an overflow pipe is arranged above an alarm water level of the floating ball liquid level alarm device on the side wall of the water tank, and the overflow pipe is communicated with the drain tail pipe.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] 1. According to the plunger pump packing leakage standard, the micro gear flow meter is arranged, the leakage amount is accurately quantified and judged, and advanced alarm, advanced maintenance and quantitative monitoring are realized.

[0028] 2. The utility model has sound-light and remote prediction functions; the PLC control is applied to the reduction motor, automatic packing is realized, the inspection frequency is effectively reduced, and the labor intensity is reduced.

[0029] 3. The utility model discloses avoid the sudden emergence of the packing and eliminate the hidden danger of safety.

[0030] 4. The utility model discloses simple structure, easy production, low in production cost, practicality is strong, safe and reliable, simple installation, no change equipment, no influence equipment integrity. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a kind of oilfield injection with plunger pump piston packing leakage alarm device's structure schematic diagram of the utility model.

[0032] In the drawing: plunger 1, worm gear pressure cap 2, reduction motor 3, packing box 4, filter 5, tank bottom 6, water leakage bend 7, water tank 8, float 9, drain pipe 10, micro gear flowmeter 11, drainage tail pipe 12, drainage ditch 13, overflow pipe 14, power connector 15, cable 16, wire 17, audible and visual alarm 18, transmitter 19, base station 20, switch 21, camera 22, terminal monitoring computer 23, communication line 24, PLC controller 25, control line 26. DETAILED DESCRIPTION

[0033] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0034] Embodiment 1:

[0035] Please refer to Figure 1 The utility model discloses a kind of oilfield injection with plunger pump piston packing leakage alarm device, including water tank 8, micro flow alarm device, float liquid level alarm device, packing pressure cap automatic tightening mechanism.

[0036] The water tank 8 is communicated with the tank bottom 6 of plunger pump by water leakage bend 7, and the water tank 8 is communicated with drainage ditch 13 by drain pipe 10.

[0037] The micro flow alarm device includes micro gear flowmeter 11 and terminal monitoring computer 23, the micro gear flowmeter 11 is connected with the port of drain pipe 10, and the micro gear flowmeter 11 is communicatively connected with terminal monitoring computer 23;The micro gear flowmeter 11 is used to measure the micro flow of plunger pump packing leakage, and the measured data is transmitted to terminal monitoring computer 23, when the water leakage flow is close to the upper limit, an alarm signal is sent, and the alarm is displayed on terminal monitoring computer 23.

[0038] Specifically, the micro gear flow meter 11 is connected with a transmitter 19 through a communication line, the transmitter 19 is connected with a base station 20 wirelessly, and the base station 20 is connected with a terminal monitoring computer 23.

[0039] Specifically, the drain pipe 10 is a transparent pipe, facilitating observation of the clogging condition.

[0040] The side-mounted floating ball liquid level alarm device includes an electric connector 15 of a side-mounted floating ball liquid level switch embedded in a side wall of the water tank 8 and a float 9 of the side-mounted floating ball liquid level switch arranged in the water tank 8, and the electric connector 15 is connected with an audible and visual alarm 18 through an electric wire 17; the side-mounted floating ball liquid level alarm device is used for alarming when the micro gear flow meter 11 is clogged by rust scale, and the float 9 is floated up to close a normally open switch in the circuit when the side-mounted floating ball liquid level switch is subjected to the buoyancy of water, the circuit is closed to supply power to the audible and visual alarm 18, and audible and visual alarm is issued, so that maintenance personnel can respond and dispose in time to clean the drain pipe 10; the side-mounted floating ball liquid level alarm device is also used for alarm when the pump piston packing flow exceeds the standard, the float 9 is floated up when the leakage is too fast and liquid cannot be completely discharged, audible and visual alarm is issued, and the water injection pump is stopped, so that maintenance personnel can respond and dispose in time to replace the plunger and packing disc, preventing leakage accidents.

[0041] Specifically, the electric connector 15 is connected with the transmitter 19 through the electric cable 16,

[0042] The packing cap automatic tightening mechanism includes a worm cap 2, a speed reducer motor 3 and a PLC controller 25, the worm cap 2 is arranged on the outer peripheral side wall of the packing cap of the plunger pump, the output shaft of the speed reducer motor 3 is connected with a worm through a shaft coupling, the worm is engaged with the worm cap 2, the speed reducer motor 3 is connected with the PLC controller 25 through a control line 26, and the PLC controller 25 is connected with the base station 20 through a communication line 24; when the PLC controller 25 receives the alarm signal sent by the micro gear flow meter 11, the signal is converted to a motor driving module, the speed reducer motor 3 is started, the worm drives the worm cap 2 to rotate and press the packing, until the set number of turns, and the PLC controller 25 stops the speed reducer motor 1 from running.

[0043] Embodiment 2

[0044] Based on the embodiment 1, the embodiment further improves.

[0045] Since the plunger 1 and the packing box 4 are continuously dripped with water for a long time, rust scale is formed on the bottom 6 of the water injection pump tank, and the rust scale pieces falling off are pushed into the drain hole of the tank bottom 6 by the dripped water, causing the drain pipe 7 to be clogged. In order to prevent the drain pipe 7 and the drain pipe 10 from being clogged, the filter 5 is installed on the drain hole of the tank bottom 6 to prevent the rust scale pieces falling off from entering the water tank 8.

[0046] In this embodiment, a camera 22 is also included, which is connected to a terminal monitoring computer 23 through the switch 21, and the base station 20 is connected to the terminal monitoring computer 23 through the switch 21; when the audible and light alarm 18 emits sound and light, the personnel in the monitoring room monitors the sound and light emitted by the audible and light alarm 18 from the camera 22 and the terminal monitoring computer 23, and timely arranges the inspection personnel to take the measure of replacing the packing to control the dripping amount within the standard for the water injection pump station without the speed reducer motor 3. When the transmitter 19 emits an alarm signal, the signal is converted by the PLC controller 25 and transmitted to the motor driving module through the control line 26, the speed reducer motor 3 is started to drive the worm to rotate the worm gear cap 2 to tighten the packing until the set number of turns, and the speed reducer motor 3 is automatically stopped. At the same time, the personnel in the monitoring room monitors the operation of the speed reducer motor 3 from the terminal monitoring computer 23.

[0047] In this embodiment, the outlet of the micro gear flowmeter 11 is provided with a drainage tail pipe 12, the side wall of the water tank 8 is provided with an overflow pipe 14 above the alarm water level of the floating ball liquid level alarm device, the overflow pipe 14 is communicated with the drainage tail pipe 12; the dripping water of the plunger 1 and the packing box 4 flows into the water leakage elbow 7, the water tank 8, the drainage pipe 10, the micro gear flowmeter 11 and the drainage tail pipe 12 in sequence and enters the drainage ditch 13, and the dripping water is drained; when the dripping amount of the plunger 3 and the packing box 4 exceeds the set standard drainage amount, the liquid level of the water tank 8 rises to lift the float 9, the power supply loop of the audible and light alarm 18 and the transmitter 19 is connected through the cable 16 and the wire 17 respectively, and alarm signals are emitted respectively; when the liquid level of the water tank 8 continues to rise, the dripping water flows out of the overflow pipe 14 and flows into the drainage tail pipe 12 to the drainage ditch 13.

[0048] It should be noted that the micro gear flowmeter 11, the audible and light alarm 18, the transmitter 19, the base station 20, the switch 21, the camera 22, the terminal monitoring computer 23, the PLC controller 25 and the floating ball liquid level alarm device all belong to the prior art, and the contribution of the utility model lies in that they are combined together.

[0049] Embodiment 3:

[0050] On the basis of embodiment 2, the use method of the plunger pump piston packing leakage alarm device for oil field water injection is provided in this embodiment.

[0051] S1, the micro gear flowmeter 11 measures the fluid flow in real time, and when the flow exceeds the preset threshold value, the control unit in the micro gear flowmeter 11 generates an alarm signal, which is sent to the base station 20 through the transmitter 19, and the base station 20 transmits the alarm signal to the PLC controller 25 and the switch 21 respectively after receiving the alarm signal;

[0052] The alarm signal received by the switch 21 is transmitted to the terminal monitoring computer 23, and finally displayed on the terminal monitoring computer 23;

[0053] The alarm signal received by the PLC controller 25 is converted into a control instruction, and the speed reducer motor 3 is started through the control line 26 to drive the worm gear cap 2 to rotate the packing box 4 until the alarm signal disappears, and the PLC controller 25 stops the speed reducer motor 3, and generally, the worm gear cap 2 rotates 1-2 rounds.

[0054] S2, when the drain pipe 10 is blocked by scaling, the leakage cannot be discharged, at this time, the flow is low, the leakage makes the side-mounted floating ball liquid level switch be subjected to the buoyancy of water, the float 9 floats up, the circuit normally-open switch is closed, the circuit is closed to supply power to the sound and light alarm 18, sound and light alarms are issued, maintenance personnel respond in time to deal with, and the drain pipe 10 is cleaned.

[0055] S3, when the leakage amount is greater than the displacement, the liquid accumulates, at this time, the flow is high, the micro gear flowmeter 11 issues an alarm, the float 9 floats up, sound and light alarms are issued, and the water injection pump is stopped, maintenance personnel respond in time to deal with, and the plunger and the packing are replaced to prevent leakage accidents.

[0056] After the utility model is applied, the number of inspection times is reduced by 110,000 yuan of cost is saved per year, the plunger and the packing are replaced in time, water loss is reduced, the service life of the crankcase is prolonged, 330,000 yuan of maintenance cost is saved per year, and 440,000 yuan of benefits are created per year. Through application of the device, pump efficiency is improved, alarms are issued before leakage to prevent equipment accidents; labor intensity of workers is reduced, safe operation of the water injection pump is ensured, and system efficiency is improved; the service life of the water injection pump is prolonged, and the whole life cycle maintenance cost is saved.

[0057] In the application, parts that are not expanded are the known technology in the technical field, and the connection mode of the parts in the application is the known technology in the technical field. Direct application can be used, and details are not repeated.

[0058] In the utility model, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense. For example, "connection" can be fixed connection, or detachable connection, or integrally connected. "Connection" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0059] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0060] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and the utility model can have various changes and changes for those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An oilfield water-filling plunger pump piston packing leakage alarm device, comprising a water tank, a drain pipe is arranged at the bottom of the water tank, characterized in that, Further comprising flow alarm device, liquid level alarm device; The flow alarm device comprises a flow meter and a monitor, the flow meter is connected with the port of the drain pipe, and the flow meter is in communication connection with the monitor; The liquid level alarm device is connected with the tank wall of the water tank, and the liquid level alarm device is in communication connection with the monitor.

2. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 1, characterized in that, The flow meter is connected with a transmitter through a communication line, the transmitter is wirelessly connected with a base station, and the base station is connected with the monitor.

3. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 2, characterized in that, The liquid level alarm device comprises a side-mounted floating ball liquid level switch, an electric connector of the side-mounted floating ball liquid level switch is embedded in the side wall of the water tank, a float of the side-mounted floating ball liquid level switch is arranged in the water tank, the electric connector is connected with the audible and visual alarm through an electric wire, and the electric connector is connected with the transmitter through a cable.

4. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 3, characterized in that, Further comprising a packing cap automatic tightening mechanism; The packing cap automatic tightening mechanism comprises a worm gear cap, a motor and a controller. The worm gear structure arranged on the outer peripheral side wall of the packing cap of the plunger pump is a worm gear cap. The output shaft of the motor is connected with a worm through a shaft coupling, and the worm is engaged with the worm gear of the worm gear cap. The motor is connected with the controller through a control line, and the controller is connected with the base station through a communication line.

5. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 4, characterized in that, Further comprising a camera, the camera is connected with the monitor through a switch, and the base station is connected with the monitor through the switch.

6. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 4, characterized in that, The flow meter is a micro gear flow meter, the monitor is a terminal monitoring computer, and the controller is a PLC controller.

7. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 1, characterized in that, The drain pipe is a transparent pipe.

8. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 1, characterized in that, The water tank is communicated with the drain hole at the bottom of the plunger pump through a leakage pipe.

9. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 8, characterized in that, A filter is installed on the drain hole at the bottom.

10. The leak-off alarm device for the plunger pump piston packing of an oilfield water injection pump according to claim 1, characterized in that, An outlet of the flow meter is provided with a drain tail pipe, an overflow pipe is arranged above the alarm water level of the liquid level alarm device on the side wall of the water tank, and the overflow pipe is communicated with the drain tail pipe.

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