CN217028871U - Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof - Google Patents

Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof Download PDF

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Publication number
CN217028871U
CN217028871U CN202121265695.8U CN202121265695U CN217028871U CN 217028871 U CN217028871 U CN 217028871U CN 202121265695 U CN202121265695 U CN 202121265695U CN 217028871 U CN217028871 U CN 217028871U
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China
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pump body
valve port
pump
piston
dosing
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CN202121265695.8U
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史佳
黄海澈
池爱文
温庆宇
徐萌
周黎莎
陈瑞鹏
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ZHEJIANG JINLONG AUTOMATIC CONTROL EQUIPMENT CO LTD
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ZHEJIANG JINLONG AUTOMATIC CONTROL EQUIPMENT CO LTD
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Abstract

The utility model discloses an intelligent negative pressure oil well mouth dosing device and a steady flow displacement pump thereof, wherein the steady flow displacement pump comprises a pump body and a driving device, a piston cavity, a medium outlet, a medium inlet and a steady flow structure are arranged in the pump body, the steady flow structure comprises a front upper valve port, a rear upper valve port, a front lower valve port and a rear lower valve port which are respectively arranged on the top surface and the bottom surface of the piston cavity, a sealing surface and a check ball are arranged in the valve ports, and the check ball is matched with the sealing surface and is movably arranged up and down along the valve ports. The medicine adding device comprises a volumetric pump, a medicine storage tank, a water inlet pipe, a jet device, a heater and a control cabinet for checking the running state. According to the utility model, the steady flow structure and the piston in the pump body divide the piston cavity into a left cavity structure and a right cavity structure, so that the stable dosing of the liquid medicine is realized; the flow is accurately controlled through the control cabinet, the ejector, the heater and the like, and the dosing pressure is improved, so that the dosing efficiency of the dosing device is improved, and the operation cost is reduced.

Description

Intelligent negative pressure oil well wellhead chemical feeding device and steady flow displacement pump thereof
Technical Field
The utility model relates to the technical field of chemical dosing of a wellhead of a water injection well, in particular to an intelligent negative-pressure chemical dosing device for the wellhead of an oil well and a steady flow displacement pump of the intelligent negative-pressure chemical dosing device.
Background
In the process of oilfield water injection, agents such as corrosion inhibitors, bactericides, scale inhibitors and the like are added, and the agents are injected into a water injection pipeline by a chemical injection pump and then injected into a water injection well after being pressurized by the water injection pump. At present, the dosing modes of a water injection well are generally divided into two types: firstly, a low-pressure dosing pump is used for filling before the pressurization of a water injection station; and secondly, injecting by a high-pressure dosing pump at the wellhead of the water injection well. However, with the deep development of oil fields, the environmental conditions are worsened more and more, the method has certain inapplicability, the in-station dosing is only suitable for the whole block or well group, the dosing cost is high, the pertinence is not strong, and the dosing of a single well cannot be realized; although the filling of the wellhead high-pressure dosing pump can meet the requirement of dosing of a single well, the pertinence is strong, the dosage of the medicament is low, but a high-pressure metering pump needs to be installed on site, so that the workload of safety, management and maintenance and the energy consumption of industrial power consumption are increased.
The utility model provides a high-pressure jet dosing mode and a dosing device for a wellhead of a water injection well, wherein a nozzle which is connected with a pressure pipe box and is provided with an abrasion-resistant coating extends into a cavity from one end of a negative pressure generation cavity, the other end of the negative pressure generation cavity is connected with a reducing throat pipe, the other end of the throat pipe is connected with an expanding diffusion pipe, the other end of the diffusion pipe is connected with a discharge pipeline, one end of the dosing pipe box is connected with a medicine storage tank, the other end of the dosing pipe box is radially connected with the negative pressure generation cavity, and a gate for controlling dosing amount is arranged on the dosing pipe box. This scheme is producing the negative pressure through fluidic device, and discharge line pours into the well into after inhaling the liquid medicine and carrying out energy conversion in the venturi, has improved the pressure of pouring into liquid into, has played energy saving and consumption reduction's effect to a certain extent.
However, the above-described scheme has the following problems:
in the practical application process of the scheme, a medicine feeding pipe box for controlling medicine feeding is usually provided with a medicine feeding pump for pumping out liquid medicine from a medicine storage tank. The conventional plunger pump, the conventional diaphragm pump and the like are easy to pump out unstable liquid medicine flow due to self structural factors, and meanwhile, the conventional dosing pump is low in power and generally needs larger energy consumption to maintain the normal operation of the dosing device, so that the operation cost of the dosing device is increased.
In view of this, it is urgently needed to improve a wellhead dosing device in the prior art so as to improve the stability of dosing flow and reduce the operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the existing wellhead chemical adding device is complex in structure, unstable in chemical adding flow, high in operation cost and incapable of meeting the production requirements of oil wells at the present stage.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a steady flow volumetric pump, includes the pump body, be equipped with piston chamber and medium export and medium entry in the pump body, still include:
the driving device is arranged on the left side of the pump body, is connected with the piston rod through a connecting assembly and is used for driving the piston rod and the piston to move left and right along the piston cavity;
still be equipped with the stationary flow structure in the pump body, the stationary flow structure includes:
the front upper valve port and the rear upper valve port which are communicated with the medium outlet are arranged on the top surface of the piston chamber and are communicated with the piston chamber; the front upper valve port and the rear upper valve port are arranged in the front-back direction along the length direction of the piston chamber; a first sealing surface is arranged in the front upper valve port, and a first check ball is movably arranged in the front upper valve port and is matched with the first sealing surface; a second sealing surface is arranged in the rear upper valve port, and a second check ball is movably arranged in the rear upper valve port and is matched with the second sealing surface;
the front lower valve port and the rear lower valve port are communicated with the medium inlet, are arranged on the bottom surface of the piston chamber and are communicated with the piston chamber; the front lower valve port and the rear lower valve port are arranged in the front-back direction along the length direction of the piston chamber; a third sealing surface is arranged in the front lower valve port, and a third check ball is movably arranged in the front lower valve port and is matched with the third sealing surface; and a fourth sealing surface is arranged on the rear lower valve port, and a fourth check ball is movably arranged in the rear lower valve port and is matched with the fourth sealing surface.
In the above solution, preferably, the pump body includes a main pump body, and further includes:
the upper pump body is arranged on the top surface of the main pump body, and the upper pump body is internally provided with the medium outlet and a medium outlet channel for communicating the front upper valve port, the rear upper valve port and the medium outlet;
the lower pump body is arranged on the bottom surface of the main pump body, and the lower pump body is internally provided with the medium inlet and a medium inlet channel for communicating the front lower valve port, the rear lower valve port and the medium inlet; the third sealing surface and the fourth sealing surface are disposed on the top surface of the lower pump body.
In the foregoing aspect, preferably, the main pump body includes:
an intermediate pump body, the piston chamber disposed within the intermediate pump body; the first and second sealing surfaces are disposed on a top surface of the intermediate pump body;
the left pump body is arranged on the left end face of the middle pump body; the right end surface of the piston is convexly arranged in the piston cavity;
the right pump body is arranged on the right end surface of the middle pump body, and the left end surface of the right pump body is convexly arranged in the piston cavity; a packing chamber is arranged on the right end face of the piston rod, a packing gland is arranged on the packing chamber, the piston rod penetrates through the packing chamber and the packing gland, and packing is arranged between the piston rod and the packing chamber.
In the above solution, preferably, the upper portions of the front upper valve port, the rear upper valve port, the front lower valve port, and the rear lower valve port are provided with check ball blocking portions for preventing the check balls from being separated.
In the above scheme, preferably, graphite is disposed between the middle pump body and the left pump body, between the middle pump body and the right pump body, between the middle pump body and the upper pump body, and between the middle pump body and the lower pump body.
In the above scheme, preferably, the driving device is an electric actuator, and is disposed on the right side of the bracket, and the connection assembly includes:
the bracket is arranged on the right end surface of the right pump body, and the piston rod is arranged in the bracket;
the piston rod nut is arranged on the output end of the electric actuator and is in threaded connection with the piston rod; the electric actuator is mounted on the bracket.
The utility model provides an intelligence negative pressure oil well wellhead charge device, includes the cabinet of adding medicine, adds the above-mentioned stationary flow displacement pump in the cabinet of adding medicine, still includes:
the medicine storage tank is arranged at the lower part of the medicine feeding cabinet and is communicated with a medium inlet of the steady flow volumetric pump;
the water inlet pipe is arranged in the medicine feeding cabinet;
the ejector is arranged on the water inlet pipe and is communicated with the medium outlet of the steady flow volumetric pump through a dosing pipe;
the heater is communicated with the outlet of the ejector through a medicine conveying pipe and is used for heating the medicine; the outlet end of the heater is provided with a medicine outlet pipe;
and the control cabinet is arranged in the medicine adding cabinet and is used for monitoring the running state of each device in the medicine adding cabinet.
In the above scheme, preferably, be equipped with the potentiometre in the medicine storage tank, still be equipped with the flowmeter on the medicine conveying pipe, be equipped with temperature transmitter on the heater, be equipped with pressure transmitter on going out the pencil, the potentiometre the flowmeter temperature transmitter with pressure transmitter's signal access the switch board.
In the above scheme, preferably, be equipped with medicine storage tank heat preservation cotton on medicine storage tank's the lateral surface, medicine storage tank heat preservation cotton pastes on medicine storage tank's the left and right sides and front and back side.
In the above scheme, preferably, the medicine adding cabinet comprises a box body frame and a door plate, the door plate is detachably mounted on the box body frame, the door plate and the box body frame are grounded, and the grounding wire is arranged on the inner side of the box body frame.
Compared with the prior art, the intelligent negative pressure oil well wellhead dosing device provided by the utility model has the advantages that the volume pump realizes stable dosing of the dosing pump through the flow stabilizing structure, and the problem of unstable flow generated by a conventional plunger pump and a diaphragm pump is avoided; the displacement pump adopts the actuator to control the movement of the piston rod in the pump, so that the traditional motor drive is changed, the power is reduced, and the energy consumption is reduced. The intelligent negative pressure oil well mouth dosing device realizes steady flow dosing through the displacement pump, and realizes accurate control of pump flow by controlling the driving device to drive the piston to move through the control cabinet, so that the accuracy of the dosing control of the dosing device is greatly improved, and accurate dosing is realized; the dosing pressure is improved through the flow ejector, the heater and the like, and the liquid outlet effect of small flow and large pressure is realized, so that the dosing efficiency of the dosing device is improved, the operation cost is reduced, and the application prospect is wide.
Drawings
FIG. 1 is a schematic diagram of the internal structure of an intelligent negative pressure oil well wellhead chemical dosing device in the utility model;
FIG. 2 is a side view of the intelligent negative pressure oil well wellhead chemical dosing device of the present invention;
FIG. 3 is a top view of the intelligent negative pressure wellhead chemical dosing device of the present invention;
FIG. 4 is a schematic sectional view of the positive displacement pump of the present invention;
FIG. 5 is a schematic cross-sectional view of the pump body according to the present invention;
fig. 6 is a side view of the positive displacement pump of the present invention.
The correspondence between the names and reference numbers of the components in fig. 1 to 6 is as follows:
a medicine adding cabinet 1, a steady flow volumetric pump 2, a medicine storage tank 3, a water inlet pipe 4, an ejector 5, a heater 6, a medicine outlet pipe 7 and a control cabinet 8,
the box body frame 11, the door panel 12,
a driving device 21, a piston rod 22, a piston 23, an upper pump body 24, a lower pump body 25, a middle pump body 26, a left pump body 27, a right pump body 28, graphite 29,
the combination of bracket 211, piston rod nut 212,
the media outlet 241, the media outlet channel 242,
a media inlet 251, a media inlet passage 252, a third sealing surface 253, a fourth sealing surface 254,
a front upper port 261, a rear upper port 262, a front lower port 263, a rear lower port 264, a check ball blocking portion 265,
a first sealing surface 2611, a first check ball 2612,
a second sealing surface 2621, a second check ball 2622,
the third check ball 2631 is provided in a third position,
the fourth check ball 2641 is provided in a shape of a ball,
a packing chamber 281, a packing gland 282, a packing 283,
the potentiometer (31) is used for measuring the voltage,
a dosing tube 51, a drug delivery tube 52, a flow meter 53,
the temperature of the temperature transmitter (61) is,
a pressure transmitter 71.
Detailed Description
The utility model provides an intelligent negative pressure oil well wellhead dosing device and a steady flow displacement pump thereof, which are used for regulating the liquid medicine to be pumped into a jet pipe and mixed with water through the steady flow displacement pump, so that the flow stability and the flow control accuracy during dosing are improved, stable dosing and flow control are realized, and the intelligent negative pressure oil well wellhead dosing device has wide applicability. The utility model is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1, 2 and 3, the intelligent negative pressure oil well wellhead chemical feeding device provided by the utility model comprises a chemical feeding cabinet 1, wherein a steady flow displacement pump 2 is arranged in the chemical feeding cabinet 1, and the intelligent negative pressure oil well wellhead chemical feeding device is further provided with a chemical storage tank 3, a water inlet pipe 4, an ejector 5, a heater 6, a chemical outlet pipe 7 and a control cabinet 8.
As shown in fig. 4, 5 and 6, the steady flow volumetric pump 2 includes a pump body, a driving device 21, a piston rod 22 and a piston 23, the driving device 21 is mounted on the pump body through a connecting assembly, a piston chamber 20 is provided in the pump body, and the piston rod 22 drives the piston 23 to move left and right along the piston chamber 20. The pump body comprises a main pump body, an upper pump body 24 and a lower pump body 25.
The main pump body is a combined pump body and comprises a middle pump body 26, a left pump body 27 and a right pump body 28. The piston chamber 20 is provided in the intermediate pump body 26, and a front upper valve port 261 and a rear upper valve port 262 are provided on the top surface of the intermediate pump body 26, and the front upper valve port 261 and the rear upper valve port 262 are provided on the top surface of the piston chamber 20, are provided back and forth in the length direction of the piston chamber 20, and communicate with the piston chamber 20. The front upper valve port 261 is provided with a first sealing surface 2611 and a first check ball 2612 inside, the first sealing surface 2611 is arranged at the lower end of the front upper valve port 261, and the first check ball 2612 is movably arranged up and down along the front upper valve port 261 and is matched with the first sealing surface 2611. The rear upper valve port 262 is internally provided with a second sealing surface 2621 and a second check ball 2622, the second sealing surface 2621 is arranged at the lower end of the rear upper valve port 262, and the second check ball 2621 is movably arranged up and down along the rear upper valve port 262 and is matched with the second sealing surface 2622.
The bottom surface of the middle pump body 26 is provided with a front lower valve port 263 and a rear lower valve port 264, and the front lower valve port 263 and the rear lower valve port 264 are disposed on the bottom surface of the piston chamber 20, disposed back and forth along the length direction of the piston chamber 20, and communicated with the piston chamber 20. A third check ball 2631 is disposed in the lower front valve port 263 and the third check ball 2631 is vertically movably disposed along the upper front valve port 263. A fourth check ball 2641 is disposed in the lower rear valve port 264, and the fourth check ball 2641 is movably disposed up and down along the lower rear valve port 264.
The front upper valve port 261, the rear upper valve port 262, the front lower valve port 263 and the rear lower valve port 264 are each provided at an upper portion thereof with a check ball blocking portion 265 for preventing a check ball from being separated from the valve ports.
The left pump body 27 is mounted on the left end face of the intermediate pump body 26, with its right end face disposed convexly within the piston chamber 20. The right pump body 28 is mounted on the right end face of the intermediate pump body 27, with its left end face disposed convexly within the piston chamber 20. A packing chamber 281 is provided on the right end surface of the right pump body 28, a packing gland 282 is provided on the packing chamber 281, the piston rod 22 is provided to penetrate the packing chamber 281 and the packing gland 282, and a packing 283 is provided between the piston rod 22 and the packing chamber 281.
The upper pump body 24 is mounted on the top surface of the main pump body, and the upper pump body 24 is provided with a medium outlet 241 and a medium outlet channel 242, and the medium outlet channel 242 is used for communicating the front upper valve orifice 261, the rear upper valve orifice 262 and the medium outlet 241. The lower pump body 25 is disposed on the bottom surface of the main pump body, the lower pump body 25 is provided with a medium inlet 251 and a medium inlet channel 252, and the medium inlet channel 252 is used for communicating the front lower valve port 263, the rear lower valve port 264 and the medium inlet 251. The top surface of the lower pump body 25 is provided with a third sealing surface 253 and a fourth sealing surface 254, the third sealing surface 253 and the fourth sealing surface 254 are respectively arranged at the lower ends of the front lower valve port 263 and the rear lower valve port 264, and the third check ball 2631 and the fourth check ball 2641 are respectively matched with the third sealing surface 253 and the fourth sealing surface 254.
Graphite 29 is arranged between the middle pump body 26 and the left pump body 27, between the right pump body 28, between the upper pump body 24 and between the middle pump body and the lower pump body 25, so that sealing is kept among all parts of the pump bodies.
The driving device 21 is an electric actuator, the connecting assembly comprises a bracket 211 and a piston rod nut 212, the bracket 211 is arranged on the right end face of the right pump body 28, the piston rod 22 is arranged in the bracket, and the electric actuator is arranged on the right side of the pump body through the bracket 211. The piston rod nut 212 is installed on the output end of the electric actuator, is in threaded connection with the piston rod 22, and is used for driving the piston rod 22 to drive the piston 23 to move left and right along the piston chamber 20.
Add medicine cabinet 1 and include box frame 11 and door plant 12, door plant 12 detachably installs on box frame 11, door plant 12 and box frame 11 ground connection for prevent to add medicine cabinet 1 and add the interior equipment of medicine cabinet 1 and take place the electric leakage accident. The grounding wire is arranged on the inner side of the box body frame 11, so that the grounding wire is prevented from being damaged by external force, and the effects of protecting the grounding wire and prolonging the service life of the grounding wire are achieved.
The medicine storage tank 3 is arranged at the lower part of the box body frame 11, and the medicine storage tank 3 is communicated with a medium inlet 251 of the steady flow volumetric pump 2. The water inlet pipe 4 is arranged in the medicine adding cabinet 1 and is used for accessing clear water for diluting the medicine liquid. The ejector 5 is arranged on the water inlet pipe 4 and is communicated with a medium outlet 241 of the steady flow volumetric pump 2 through a dosing pipe 51.
The heater 6 is communicated with the outlet of the ejector 5 through a drug delivery pipe 52 for heating the drug. The medicine outlet pipe 7 is arranged on the outlet end of the heater 6. The control cabinet 8 is arranged in the dosing cabinet 1, the potentiometer 31 is arranged in the medicine storage tank 3, the flow meter 53 is further arranged on the medicine conveying pipe 52, the temperature transmitter 61 is arranged on the heater 6, the pressure transmitter 71 is arranged on the medicine outlet pipe 7, and signals of the potentiometer 31, the flow meter 53, the temperature transmitter 61 and the pressure transmitter 71 are connected into the control cabinet 8 and used for monitoring the operation state of each device in the dosing cabinet 1.
The working process of the utility model is as follows:
water passes through inlet tube 4 and gets into charge device, the medicament is stored in medicine storage tank 3, when needs add the medicine, stationary flow volumetric pump 2 begins work, the medicament gets into the pump in from medium entry 251, stationary flow volumetric pump 2 realizes that the dose is stable to get into and output because its special stationary flow structure, the medicament flows through stationary flow volumetric pump 2 and gets into ejector 5 from adding pencil 51, ejector 5 has certain suction to the medicament, make the medicament get into inlet tube 4 more easily and water misce bene, later flow through flowmeter 53 again after the heating of heater 6 by play during the system that the pencil 7 flows out and get into the medicine that needs. Signals of the temperature transmitter 61, the pressure transmitter 71, the potentiometer 31, the flowmeter 53 and the like are connected to the control cabinet 10 through wires, and the operation state of the equipment can be observed through the control cabinet 10, so that the flow of the dosing device can be accurately controlled.
The working process of the steady flow displacement pump 2 is as follows:
the driving device 21 is an electric actuator, which generates a rotational motion, and the rotational force is converted into an axial force by the piston rod nut 212 to drive the piston rod 22 to push and pull left and right, so that the push-pull force is transmitted to the piston 23 to move left and right along the piston chamber 20.
When the piston 23 moves rightward, a vacuum is generated in the left chamber of the piston chamber 20, which generates a suction force on the first check ball 2612 and the third check ball 2631, so that the first check ball 2612 moves downward to press the first sealing surface 2611, thereby increasing the sealing performance of the main pump body; and the third check ball 2631 is moved upward to allow the medical fluid in the medium inlet passage 252 to enter the left chamber of the piston chamber 20.
Meanwhile, the pressure of the right chamber of the piston chamber 20 increases, which generates thrust on the second check ball 2622 and the fourth check ball 2641, so that the fourth check ball 2641 moves downward, and the fourth check ball 2641 is matched with the fourth sealing surface 254, thereby increasing the sealing performance of the main pump body; and the second check ball 2622 is moved upward to extrude the medical fluid in the right chamber of the piston chamber 20 and deliver the medical fluid to the medium outlet 241 through the medium outlet passage 242.
When the piston 23 moves to the left, vacuum in the right chamber of the piston chamber 20 generates suction on the second check ball 2622 and the fourth check ball 2641, so that the second check ball 2622 moves downward to press the second sealing surface 2611, thereby increasing the sealing performance of the main pump body; and the fourth check ball 2641 is moved upward, drawing inlet media into the chamber on the right side of the piston.
Meanwhile, the pressure of the left chamber of the piston chamber 20 increases, which generates thrust on the first check ball 2612 and the third check ball 2631, so that the first check ball 2612 moves upwards to extrude the medical liquid in the left chamber of the piston chamber 20 out and deliver the medical liquid to the medium outlet 241 through the medium outlet channel 242; the third check ball 2631 is moved downward to press against the third sealing surface 253, increasing the sealing of the main pump body.
Through the steady flow structure of the pump body 10, the flow of the liquid medicine pumped by the displacement pump is kept stable, so that the phenomenon of unstable flow in the application process of a conventional plunger pump, a conventional diaphragm pump and the like is eliminated, the accuracy of the concentration of the liquid medicine is improved, and meanwhile, the medicine feeding flow is accurately controlled.
Compared with the prior art, the intelligent negative pressure oil well wellhead dosing device provided by the utility model has the advantages that the steady flow displacement pump utilizes the left and right chambers and the steady flow structure to realize steady flow dosing, and the accuracy of liquid medicine preparation and the accuracy of dosing flow control are improved. The control cabinet is connected with the flow meter and the heater, so that the operation states of all devices in the dosing process can be observed and monitored, and the automation and intelligence level of the dosing device is greatly improved.
In this scheme, the pump body includes the main pump body, installs respectively on the main pump body top surface and the upper pump body and the lower pump body on the bottom surface, adopts the combination formula pump body, has reduced the combination degree of difficulty of stationary flow structure, conveniently assembles the stationary flow pump.
In this scheme, be equipped with the potentiometre in the medicine storage tank, still be equipped with the flowmeter on the medicine conveying pipe, be equipped with temperature transmitter on the heater, be equipped with pressure transmitter on going out the pencil, potentiometre, flowmeter, temperature transmitter and pressure transmitter's signal access switch-in switch board has improved the control cabinet to the control intensity of each equipment running state in adding the medicine cabinet, is favorable to realizing the automation intellectuality that adds the medicine flow, improves and adds medicine efficiency.
The present invention is not limited to the above preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a stationary flow volumetric pump which characterized in that, includes the pump body, be equipped with piston chamber and medium export and medium entry in the pump body, still include:
the driving device is arranged on the left side of the pump body, is connected with the piston rod through a connecting assembly and is used for driving the piston rod and the piston to move left and right along the piston cavity;
still be equipped with the stationary flow structure in the pump body, the stationary flow structure includes:
the front upper valve port and the rear upper valve port are communicated with the medium outlet, are arranged on the top surface of the piston chamber and are communicated with the piston chamber; the front upper valve port and the rear upper valve port are arranged in the front-back direction along the length direction of the piston chamber; a first sealing surface is arranged in the front upper valve port, and a first check ball is movably arranged in the front upper valve port and is matched with the first sealing surface; a second sealing surface is arranged in the rear upper valve port, and a second check ball is movably arranged in the rear upper valve port and is matched with the second sealing surface;
a front lower valve port and a rear lower valve port communicated with the medium inlet, which are arranged on the bottom surface of the piston chamber and communicated with the piston chamber; the front lower valve port and the rear lower valve port are arranged in the front-back direction along the length direction of the piston chamber; a third sealing surface is arranged in the front lower valve port, and a third check ball is movably arranged in the front lower valve port and is matched with the third sealing surface; and a fourth sealing surface is arranged on the rear lower valve port, and a fourth check ball is movably arranged in the rear lower valve port and is matched with the fourth sealing surface.
2. The flow-stabilizing volumetric pump of claim 1, wherein the pump body comprises a main pump body, further comprising:
the upper pump body is arranged on the top surface of the main pump body, and the upper pump body is internally provided with the medium outlet and a medium outlet channel for communicating the front upper valve port, the rear upper valve port and the medium outlet;
the lower pump body is arranged on the bottom surface of the main pump body, and the lower pump body is internally provided with the medium inlet and a medium inlet channel for communicating the front lower valve port, the rear lower valve port and the medium inlet; the third sealing surface and the fourth sealing surface are disposed on the top surface of the lower pump body.
3. The flow-stabilized volumetric pump of claim 2 wherein the main pump body includes:
an intermediate pump body, the piston chamber disposed within the intermediate pump body; the first sealing surface and the second sealing surface are provided on the top surface of the intermediate pump body;
the left pump body is arranged on the left end face of the middle pump body; the right end face of the piston is convexly arranged in the piston cavity;
the right pump body is arranged on the right end surface of the middle pump body, and the left end surface of the right pump body is convexly arranged in the piston cavity; a packing chamber is arranged on the right end face of the piston rod, a packing gland is arranged on the packing chamber, the piston rod penetrates through the packing chamber and the packing gland, and packing is arranged between the piston rod and the packing chamber.
4. The flow-stabilizing volumetric pump of claim 1, wherein upper portions of the front upper valve port, the rear upper valve port and the front lower valve port and the rear lower valve port are provided with check ball blocking portions for preventing a check ball from being separated.
5. The flow-stabilizing volumetric pump of claim 3 wherein graphite is disposed between the intermediate pump body and each of the left, right, upper and lower pump bodies.
6. The flow-regulated volumetric pump of claim 3 wherein the drive device is an electric actuator, the connection assembly comprising:
the bracket is arranged on the right end surface of the right pump body, and the piston rod is arranged in the bracket; the electric actuator is arranged on the right side of the bracket;
the piston rod nut is arranged on the output end of the electric actuator and is in threaded connection with the piston rod; the electric actuator is mounted on the bracket.
7. An intelligent negative pressure oil well mouth dosing device is characterized by comprising a dosing cabinet, wherein a steady flow volumetric pump as claimed in any one of claims 1 to 6 is arranged in the dosing cabinet, and the intelligent negative pressure oil well mouth dosing device further comprises:
the medicine storage tank is arranged at the lower part of the medicine feeding cabinet and is communicated with the medium inlet of the pump body;
the water inlet pipe is arranged in the medicine feeding cabinet;
the ejector is arranged on the water inlet pipe and is communicated with the medium outlet of the pump body through a dosing pipe;
the heater is communicated with the outlet of the ejector through a drug delivery pipe and is used for heating the drug; the outlet end of the heater is provided with a medicine outlet pipe;
and the control cabinet is arranged in the medicine adding cabinet and is used for monitoring the running state of each device in the medicine adding cabinet.
8. The intelligent negative-pressure oil well wellhead chemical feeding device according to claim 7, wherein a potentiometer is arranged in the chemical storage tank, a flowmeter is further arranged on the chemical conveying pipe, a temperature transmitter is arranged on the heater, a pressure transmitter is arranged on the chemical outlet pipe, and signals of the potentiometer, the flowmeter, the temperature transmitter and the pressure transmitter are connected into the control cabinet.
9. The intelligent negative-pressure oil well wellhead chemical feeding device according to claim 7, wherein the outer side surface of the chemical storage tank is provided with chemical storage tank heat-insulating cotton, and the chemical storage tank heat-insulating cotton is attached to the left side surface, the right side surface, the front side surface and the rear side surface of the chemical storage tank.
10. The intelligent negative-pressure oil well wellhead dosing device according to claim 7, wherein the dosing cabinet comprises a box body frame and a door plate, the door plate is detachably mounted on the box body frame, the door plate and the box body frame are grounded, and a grounding wire is arranged on the inner side of the box body frame.
CN202121265695.8U 2021-06-07 2021-06-07 Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof Active CN217028871U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121265695.8U CN217028871U (en) 2021-06-07 2021-06-07 Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121265695.8U CN217028871U (en) 2021-06-07 2021-06-07 Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof

Publications (1)

Publication Number Publication Date
CN217028871U true CN217028871U (en) 2022-07-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236209A (en) * 2021-06-07 2021-08-10 浙江金龙自控设备有限公司 Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236209A (en) * 2021-06-07 2021-08-10 浙江金龙自控设备有限公司 Intelligent negative pressure oil well mouth dosing device and steady flow displacement pump thereof

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