CN116411925A

CN116411925A - Pressure and flow measuring device, related equipment, method and application

Info

Publication number: CN116411925A
Application number: CN202111662143.5A
Authority: CN
Inventors: 刘合; 郑立臣; 俞佳庆; 明尔扬; 高扬; 孙伟
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-11

Abstract

The invention provides a pressure and flow measuring device, a related method and an application. The pressure and flow measuring device comprises a shell, a probe rod, a displacement transfer rod, a sampler, a displacement sensor, a first pressure sensor, a second pressure sensor, a central channel in the shell, a first pressure sensing channel and a second pressure sensing channel; the probe rod is positioned in the central channel and is connected with the probe and the displacement transfer rod, the displacement transfer rod at least partially extends out of the central channel, and the sampler is connected to the lower end of the displacement transfer rod; the first pressure sensor is arranged at the first port of the first pressure sensing channel, the second port of the first pressure sensing channel is communicated with the central channel, and the central channel is suitable for being communicated with the water outlet channel of the water nozzle of the water distributor. The underground multi-parameter high-precision metering device is compact in structure, convenient to install and low in power consumption, and can realize underground multi-parameter high-precision metering.

Description

Pressure and flow measuring device, related equipment, method and application

Technical Field

The invention relates to a pressure and flow measuring device, a water distributor, a layered water injection method and application.

Background

Separate layer water injection is an important technical means for economic and effective development of oil fields, continuous high and stable production and improvement of water flooding recovery ratio. In recent years, in order to improve the development level of oil fields and realize the efficient development of oil reservoirs, petroleum workers are forced to develop the research of the separate-layer water injection technology, the development requirement of the oil reservoirs is met to a certain extent, the problem of uneven water absorption caused by differences between layers and in layers is relieved, and the purpose of the separate-layer balanced injection and production development of the oil fields is achieved.

In the water injection process, continuous real-time monitoring of parameters such as underground flow, water injection pressure, formation pressure and the like in the injection allocation state of the injection allocation layer section of the water injection well is required to obtain a layered water injection state.

Disclosure of Invention

The inventor of the present invention found that the existing measuring and adjusting instrument adopts a separate pressure measuring instrument and a flow measuring instrument to measure pressure and flow respectively, so that the electrical wiring of the measuring and adjusting instrument is complex and the reliability is not high.

Based on the pressure and flow measuring device, the invention provides a pressure and flow measuring device, and high-precision measurement of three parameters of pressure before the mouth, pressure after the mouth and underground flow is realized.

As a first aspect of an embodiment of the present invention, the embodiment of the present invention provides a pressure and flow measuring device applied to a water dispenser, including a housing, a probe rod, a displacement transfer rod, a sampler, a displacement sensor, a first pressure sensor, a second pressure sensor, and a central channel, a first pressure sensing channel, and a second pressure sensing channel disposed in the housing;

the shell is fixed on a base of the water distributor;

the displacement sensor and the probe rod are arranged at the upper end part of the shell side by side, the probe rod is positioned in the central channel and is connected with the probe and the displacement transfer rod, the displacement transfer rod at least partially extends out of the central channel, and the sampler is connected with the lower end of the displacement transfer rod;

the first port of the first pressure sensing channel is provided with the first pressure sensor, the second port of the first pressure sensing channel is communicated with the central channel, and the central channel is suitable for being communicated with a water outlet channel of a water nozzle of the water distributor;

in one or some alternative embodiments, the first port of the second pressure sensing channel is provided with the second pressure sensor, and the second port of the second pressure sensing channel is suitable for communicating with the water inlet channel of the water nozzle of the water distributor.

In one or some optional embodiments, the sampler includes a sampling plane, a connecting rod, and a locking piece, wherein a connecting hole is formed at the top end of the connecting rod, the displacement transfer rod passes through the connecting hole to the inside of the connecting rod, the connecting rod is connected with the sampling plane, a locking hole is formed at one end of the connecting rod, which is far away from the sampling plane, and the locking piece passes through the locking hole to press the displacement transfer rod;

the sampling plane is suitable for facing the water inlet direction of the water outlet channel of the water nozzle.

In one or some alternative embodiments, the housing includes an upper housing and a lower housing, the upper housing forming a step with the lower housing.

In one or some alternative embodiments, the pressure and flow measuring device further comprises a coupling nut and a positioning nut, the lower housing being fixedly connected to the coupling nut and the positioning nut, the coupling nut being adapted to be threadedly connected to the base of the water dispenser.

In one or some alternative embodiments, the retention nut is a reverse thread.

In one or some alternative embodiments, the pressure and flow measuring device further comprises a fitting fixedly attached to the upper housing upper end for an incoming sensor wire.

In one or some alternative embodiments, the pressure and flow measuring device further comprises a displacement sensor base fixedly connected to the housing, the displacement sensor being located within the displacement sensor base.

In one or some alternative embodiments, the pressure and flow measuring device further comprises a first pressure sensor seat and a second pressure sensor seat, wherein the first pressure sensor seat and the second pressure sensor seat are fixed on the top end of the shell side by side, the first pressure sensor is located in the first pressure sensor seat, and the second pressure sensor is located in the second pressure sensor seat.

In one or some alternative embodiments, the displacement sensor comprises two eddy current sensors, and the probe is located between the two eddy current sensors.

In one or some alternative embodiments, the base is provided with a water flow channel along the radial direction, the water flow channel is communicated with a water outlet channel of the water nozzle, and the sampler is positioned in the water flow channel.

In one or some alternative embodiments, the sampling plane is detachably connected to the connecting rod.

In one or some alternative embodiments, the probe is a vertically disposed circular metal sheet. In one or some alternative embodiments, the probe is a hollow cylindrical rod.

As a second aspect of the embodiments of the present invention, embodiments of the present invention provide a water dispenser comprising the pressure and flow measuring device.

As a third aspect of the embodiments of the present invention, the embodiments of the present invention provide an application of the pressure and flow measurement device described above in the stratified injection of water injection wells.

As a fourth aspect of the embodiments of the present invention, the embodiments of the present invention provide a method for flooding a layer, using the pressure and flow measuring device described above.

The embodiment of the invention at least realizes the following technical effects:

according to the pressure and flow measuring device provided by the embodiment of the invention, the first pressure sensing channel is communicated with the water outlet channel of the water nozzle of the water distributor through the central channel, the second pressure sensing channel is communicated with the water inlet channel of the water nozzle of the water distributor, the first pressure sensing channel is internally provided with the first pressure sensor, and the second pressure sensing channel is internally provided with the second pressure sensor, so that the front and rear pressure of the water nozzle in the injection distributing state of the injection distributing layer section of the water injection well is measured; the second pressure sensor may detect the pre-nozzle pressure of the water nozzle and the first pressure sensor may detect the post-nozzle pressure of the water nozzle (i.e., the pressure of the water flow injected into the water-injected layer). The device can obtain the pressure before the mouth and the pressure after the mouth of the water nozzle simultaneously, and the measured pressure before the mouth and the measured pressure after the mouth can be used for water injection indication curve measurement, packer seal checking, stratum pressure recovery curve measurement, instrument normal operation judgment and the like.

According to the pressure and flow measuring device provided by the embodiment of the invention, the probe is arranged between the displacement sensors, the top end of the probe rod is connected with the probe, the bottom end of the probe rod is connected with the displacement transfer rod, the displacement transfer rod is connected with the sampler, the lower end of the probe rod deflects under the action of impact force through water flow impacting the sampling plane of the sampler, and the probe is driven to deflect through the displacement transfer rod, so that the distance between the probe and the displacement sensors is changed. And the measurement of the layered flow in the injection allocation state of the injection allocation layer section of the water injection well is realized through the change of the distance between the measuring probe and the displacement sensor.

In the pressure and flow measuring device provided by the embodiment of the invention, the displacement sensor adopts the eddy current sensor, and the eddy current sensor can accurately measure the static and dynamic relative displacement change between the measured body and the end face of the probe, so that the accuracy of the flow parameter measured by the device is high, and the long-term working reliability of the eddy current sensor is good, so that the service life of the pressure and flow measuring device is prolonged.

In the pressure and flow measuring device provided by the embodiment of the invention, the sampling plane of the sampler is detachably connected with the connecting rod, so that the sampling plane with corresponding size can be selected to be connected with the transfer rod according to the range of flow to be measured, and the range of the flow which can be measured by the device is enlarged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a side view of an embodiment of the present invention;

FIG. 3 is a front view of an embodiment of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

FIG. 5 is a B-B cross-sectional view of FIG. 3;

FIG. 6 is a schematic diagram of a sampler according to an embodiment of the present invention;

FIG. 7 is a side view of a sampler according to an embodiment of the present invention

FIG. 8 is a cross-sectional view A-A of FIG. 7;

fig. 9 is a B-B cross-sectional view of fig. 7.

Wherein:

1. the device comprises a shell, 2, an upper joint, 3, a probe, 4, a central channel, 5, a probe rod, 6, a displacement transfer rod, 7, a sampler, 701, a sampling plane, 702, a connecting rod, 703, a locking piece, 704, a connecting hole, 705, a locking hole, 8, a connecting nut, 9, a positioning nut, 10, a displacement sensor, 11, a displacement sensor base, 12, a first pressure sensor base, 13, a first pressure sensor, 14, a second pressure sensor base, 15, a second pressure sensor, 16, a second pressure sensing channel, 17, a second pressure sensing channel, 18, a water flow channel, 19 and a base.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the embodiment of the invention, the pressure and flow measuring device is applied to a water distributor and comprises a shell 1, a probe 3, a probe rod 5, a displacement transfer rod 6, a sampler 7, a displacement sensor 10, a first pressure sensor 13, a second pressure sensor 15, a central channel 4, a first pressure sensing channel 16 and a second pressure sensing channel 17 which are arranged in the shell 1;

the housing 1 is fixed on a base 19 of the water distributor;

the displacement sensor 10 and the probe rod 5 are arranged at the upper end part of the shell 1 side by side, the probe rod 5 is positioned in the central channel 4 and is connected with the probe 3 and the displacement transfer rod 6, the displacement transfer rod 6 at least partially extends out of the central channel 4, and the sampler 7 is connected with the lower end of the displacement transfer rod 6;

the first pressure sensor 13 is arranged at a first port of the first pressure sensing channel 16, a second port of the first pressure sensing channel is communicated with the central channel 4, and the central channel 4 is suitable for being communicated with a water outlet channel of a water nozzle of the water distributor;

the first port of the second pressure sensing channel 17 is provided with the second pressure sensor 15, and the second port is suitable for being communicated with a water inlet channel of a water nozzle of the water distributor.

The embodiment of the invention realizes high-precision measurement of 3 parameters of underground flow, pressure after mouth and pressure before mouth through the displacement sensor 10, the first pressure sensor 13 and the second pressure sensor probe 15. The measured pressure before the mouth and pressure after the mouth can be used for water injection indication curve measurement, packer seal inspection, stratum pressure recovery curve measurement, instrument normal operation judgment and the like. When the device works, water flow impacts the sampling plane 701 of the sampler 7, the lower end of the probe rod 5 deflects under the action of impact force, and the deflection drives the distance between the probe 3 and the displacement sensor 10 to change through the displacement transfer rod 6. The displacement sensor 10 measures the flow rate by measuring the change in distance. The method for acquiring the flow through the displacement sensor comprises the following steps: after the displacement sensor is installed, the displacement sensor is calibrated. And when the flow is calibrated, measuring with different flow to obtain the corresponding output quantity of the displacement sensor, performing curve fitting on the data to obtain a flow-displacement sensor output quantity relation curve, and writing the curve into a sensor control system. When any flow is measured, the measured output quantity of the displacement sensor is substituted into a flow-displacement sensor output quantity relation curve, and a corresponding flow value can be obtained. The first pressure sensor can detect the pressure behind the water nozzle, namely the pressure of water flow injected into the water injection layer; the second pressure sensor can detect the pressure before the mouth of water injection well choke, and this device can obtain the pressure before the mouth of water injection well choke and pressure after the mouth simultaneously, can confirm the pressure that loses the mouth according to this pressure before the mouth and pressure after the mouth, and the staff can adjust the water injection well choke according to this pressure that loses the mouth. According to the embodiment of the invention, the first pressure sensor, the second pressure sensor and the displacement sensor are arranged, so that the pressure after the mouth under different flow rates can be measured. The technician can obtain the starting pressure of the water injection layer according to different flow rates of water flow injected into the water injection layer and the pressure behind the nozzle under different flow rates. Because the pressure of the water flow injected into the water injection layer is the pressure after the water nozzle is opened, the error is eliminated, and therefore, the starting pressure determined by the device provided by the embodiment of the invention is more accurate.

The sampler 7 comprises a sampling plane 701, a connecting rod 702 and a locking piece 703, wherein a connecting hole 704 is formed in the top end of the connecting rod 702, the displacement transfer rod 6 passes through the connecting hole 704 and is led into the connecting rod 702, the connecting rod 702 is connected with the sampling plane 701, a locking hole 705 is formed in one end, away from the sampling plane 701, of the connecting rod 702, and the locking piece 703 passes through the locking hole 705 to press the displacement transfer rod 6;

the sampling plane 701 is adapted to face the incoming water direction of the water outlet channel of the water nozzle. The sampling plane 701 is locked with the displacement transfer rod 6 by a locking member 703, so that when the water flow impacts the sampling plane, the displacement transfer rod 6 can deflect, and the deflection is transmitted to the probe rod 5. As a specific embodiment, the locking member 703 is a locking jackscrew, and the external thread of the locking jackscrew is matched with the internal thread of the connecting rod 702, so as to lock the displacement transfer rod 6. When the device is suitable for different measuring flows, the sampler with different sizes can be replaced only by taking out the locking jackscrew.

In one or some alternative embodiments, the housing 1 includes an upper housing 101 and a lower housing 102, and the upper housing 101 and the lower housing 102 form a step. The upper housing 101 and the lower housing 102 are configured to be wider at the top and narrower at the bottom, so as to facilitate the fixing of the lower housing 102 to the base 19 of the water dispenser.

In one or some alternative embodiments, the pressure and flow measuring device further comprises a coupling nut 8 and a positioning nut 9, the lower housing 102 being fixedly connected to the coupling nut 8 and the positioning nut 9, the coupling nut 8 being adapted to be screwed to the base 19 of the water dispenser. The positioning nut 9 is used for positioning the coupling nut 9. As a specific embodiment, the diameter of the positioning nut 9 is smaller than that of the connecting nut 9, after the connecting nut 8 and the positioning nut 9 are fixedly connected with the lower housing 102 through threads, the lower housing 102 is fixed in the through hole of the base 19 of the water distributor by rotating the connecting nut 8, so that the sampler can enter the water flow channel.

In one or some alternative embodiments, the positioning nut 9 is a reverse thread. During installation, the coupling nut 8 is turned so that the entire device is fixed to the base 19. If the coupling nut 8 is rotated and the positioning nut 9 is threaded in the forward direction, the positioning nut 9 is rotated by friction force to move downward, so that the position of the coupling nut 8 cannot be ensured. By adopting the reverse thread, the positioning nut 9 is tightly fixed on the lower shell 102, and only becomes tighter and tighter under the action of friction force, and cannot loosen.

In one or some alternative embodiments, the pressure and flow measuring device further includes a fitting 2 fixedly attached to the upper end of the upper housing 101 for an incoming sensor wire. As a specific example, the joint 2 is connected to the housing by welding. The central hole of the joint 2 is used for transmitting wires, and the signal ends of the displacement sensor 10, the first pressure sensor 13 and the second pressure sensor 15 are respectively connected. As a specific embodiment, the central hole of the connector 2 is designed as a ferrule seat, and can be connected with a ferrule, a ferrule nut and a wire, the wire is connected with the device through the ferrule, and sealing is realized through matching of the ferrule and the ferrule seat. The specific structure of the ferrule and the ferrule holder may refer to the specific structure and implementation form in the prior art, and is not limited herein.

In one or some alternative embodiments, the pressure and flow measuring device further comprises a displacement sensor base 11, the displacement sensor base 11 is fixedly connected to the housing 1, and the displacement sensor 10 is located in the displacement sensor base 11. The displacement sensor base 11 is fixed on the top of the shell 1, and the displacement sensor 10 is fixed in the sensor base 11, so that the displacement sensor 10 is prevented from deflecting, and errors of measured relative deflection data of the probe 3 and the displacement sensor are avoided. As a specific example, the displacement sensor base 11 is connected to the housing 1 by welding.

In one or some alternative embodiments, the pressure and flow measuring device further includes a first pressure sensor seat 12 and a second pressure sensor seat 14, where the first pressure sensor seat 12 and the second pressure sensor seat 14 are fixed on top of the housing 1 side by side, the first pressure sensor 13 is located in the first pressure sensor seat 12, and the second pressure sensor 15 is located in the second pressure sensor seat 14. The first pressure sensor 13 and the second pressure sensor 15 are fixed in the housing by providing the first pressure sensor mount 12 and the second pressure sensor mount 14. As a specific example, the first pressure sensor mount 12, the second pressure sensor mount 14 are connected to the housing 1 by welding.

In one or some alternative embodiments, the displacement sensor 10 comprises two eddy current sensors, and the probe 3 is located between the two eddy current sensors. The displacement sensor 10 is two eddy current sensors, and the probe 3 is positioned between the two eddy current sensors. The eddy current sensor can accurately measure static and dynamic relative displacement changes between the measured body and the probe end face. The underground flowmeter has the characteristics of good long-term working reliability, high sensitivity, strong anti-interference capability, non-contact measurement, high response speed, no influence of oil-water and other mediums, and the traditional underground flowmeter, such as electromagnetic flowmeter and ultrasonic flowmeter, needs to actively emit electromagnetic wave or ultrasonic wave and then detect signals, and has higher power consumption. The displacement sensor of the embodiment adopts an eddy current sensor, has low power consumption, and can accurately measure the relative displacement change between the probe 3 and the probe of the eddy current sensor, thereby measuring the flow.

In one or some alternative embodiments, the base 19 is provided with a water flow channel 18 along a radial direction, the water flow channel 18 is communicated with a water outlet channel of the water nozzle, and the sampler 7 is positioned in the water flow channel 18. The lower housing 102 passes through the through-hole of the base until the sampler 7 is located in the water flow channel 18, through which water of the water nozzle flows into the water flow channel 18, striking the sampling plane 701.

In one or some alternative embodiments, the sampling plane 701 is detachably coupled to the connecting rod 702. The sampling plane 701 can be detached from the connecting rod 702, and the sampling plane 701 can be replaced according to actual needs, so that the range of the flow which can be measured by the device is improved. As a specific embodiment, the sampling plane 701 is in threaded connection with the connecting rod 702, the left end of the sampling plane 701 is a threaded male buckle, and the right end of the connecting rod 702 is a threaded female buckle, so that the connection structure is convenient to detach and install on one hand, and convenient to replace on the other hand. The specific connection between the sampling plane 701 and the connecting rod 702 may refer to the specific structure and implementation of the detachable structure in the prior art, which is not limited herein. In one or some alternative embodiments, the probe 3 is a circular metal sheet arranged vertically. The present invention uses the probe 3 to deflect between two eddy current sensors to measure displacement. The eddy current effect results from the energy of the oscillating circuit, which eddy currents need to be formed in a conductive material, so that the probe 3 is made of a conductive material such as metal. An alternating current is supplied to the coils within the sensor probe to create a magnetic field around the sensor coils. By placing the probe 3 in this magnetic field, an eddy current is excited in the probe 3 according to faraday's law of electromagnetic induction. According to the Lenz law, the magnetic field direction of the eddy current is exactly opposite to the magnetic field of the coil, and this will change the impedance value of the coil in the eddy current sensor probe. And this change in impedance value is directly related to the distance between the coil and the probe 3. When the probe 3 deflects between the eddy current sensors, the controller can obtain the variation of the voltage value from the sensor probe after the sensor probe is connected to the controller, and calculate the corresponding distance value based on the variation.

In one or some alternative embodiments, the probe 5 is a hollow cylindrical rod. As a specific embodiment, the upper end of the probe rod 5 is connected with the housing 1 by welding, and the probe rod 5 is light in weight and easy to deflect by adopting a hollow cylindrical rod, so that the accuracy of measurement is provided.

Based on the same inventive concept, the embodiment of the invention also provides a water distributor, which comprises the pressure and flow measuring device.

The specific implementation manner of the pressure and flow measurement device provided by the embodiment of the present invention may refer to the detailed description of the pressure and flow measurement device in the foregoing embodiment, and of course, in the implementation process, those skilled in the art may refer to the detailed description in the prior art, and the repetition is omitted.

Based on the same inventive concept, the embodiment of the invention also provides application of the pressure and flow measuring device in water injection well stratified injection.

Based on the same inventive concept, the embodiment of the invention also provides a separate layer water injection method, and the pressure and flow measuring device is used.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or elements in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The present invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and/or permutation of these aspects and/or embodiments. Each aspect and/or embodiment of the invention may be used alone or in combination with one or more other aspects and/or embodiments.

Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A pressure and flow measuring device for a water dispenser, characterized by: the device comprises a shell (1), a probe (3), a probe rod (5), a displacement transfer rod (6), a sampler (7), a displacement sensor (10), a first pressure sensor (13), a second pressure sensor (15), and a central channel (4), a first pressure sensing channel (16) and a second pressure sensing channel (17) which are arranged in the shell (1);

the shell (1) is fixed on a base (19) of the water distributor;

the displacement sensor (10) and the probe rod (5) are arranged at the upper end part of the shell (1) side by side, the probe rod (5) is positioned in the central channel (4) and is connected with the probe (3) and the displacement transfer rod (6), the displacement transfer rod (6) at least partially extends out of the central channel (4), and the sampler (7) is connected with the lower end of the displacement transfer rod (6);

the first pressure sensor (13) is arranged at a first port of the first pressure sensing channel (16), a second port of the first pressure sensing channel is communicated with the central channel (4), and the central channel (4) is suitable for being communicated with a water outlet channel of a water nozzle of the water distributor;

the first port of the second pressure sensing channel (17) is provided with the second pressure sensor (15), and the second port of the second pressure sensing channel is suitable for being communicated with a water inlet channel of a water nozzle of the water distributor.

2. The pressure and flow measurement device of claim 1, wherein: the sampler (7) comprises a sampling plane (701), a connecting rod (702) and a locking piece (703), wherein a connecting hole (704) is formed in the top end of the connecting rod (702), the displacement transfer rod (6) passes through the connecting hole (704) to the inside of the connecting rod (702), the connecting rod (702) is connected with the sampling plane (701), a locking hole (705) is formed in one end, away from the sampling plane (701), of the connecting rod (702), and the locking piece (703) passes through the locking hole (705) to press the displacement transfer rod (6);

the sampling plane (701) is adapted to face the incoming water direction of the water outlet channel of the water nozzle.

3. The pressure and flow measurement device of claim 1, wherein: the housing (1) comprises an upper housing (101) and a lower housing (102), wherein the upper housing (101) and the lower housing (102) form a step part.

4. A pressure and flow measurement device according to claim 3, wherein: the water distributor further comprises a connecting nut (8) and a positioning nut (9), wherein the lower shell (102) is fixedly connected with the connecting nut (8) and the positioning nut (9), and the connecting nut (8) is suitable for being in threaded connection with a base (19) of the water distributor.

5. The pressure and flow measurement device of claim 4, wherein: the positioning nut (9) adopts reverse threads.

6. A pressure and flow measurement device according to claim 3, wherein: the sensor further comprises a connector (2) fixedly connected with the upper end of the upper shell (101) and used for being introduced into a sensor wire.

7. The pressure and flow measurement device of claim 1, wherein: the sensor also comprises a displacement sensor base (11), wherein the displacement sensor base (11) is fixedly connected with the shell (1), and the displacement sensor (10) is positioned in the displacement sensor base (11).

8. The pressure and flow measurement device of claim 1, wherein: the pressure sensor comprises a shell (1), and is characterized by further comprising a first pressure sensor seat (12) and a second pressure sensor seat (14), wherein the first pressure sensor seat (12) and the second pressure sensor seat (14) are fixed on the top end of the shell (1) side by side, the first pressure sensor (13) is positioned in the first pressure sensor seat (12), and the second pressure sensor (15) is positioned in the second pressure sensor seat (14).

9. The pressure and flow measurement device of claim 1, wherein: the displacement sensor (10) comprises two eddy current sensors, and the probe (3) is positioned between the two eddy current sensors.

10. The pressure and flow measurement device of claim 1, wherein: the base (19) is provided with a water flow channel along the radial direction, the water flow channel is communicated with a water outlet channel of the water nozzle, and the sampler (7) is positioned in the water flow channel.

11. The pressure and flow measurement device of claim 2, wherein: the sampling plane (701) is detachably connected with the connecting rod (702).

12. The pressure and flow measurement device of any one of claim 1, wherein: the probe (3) is a round metal sheet which is vertically arranged.

13. The pressure and flow measurement device of any one of claim 1, wherein: the probe rod (5) is a hollow cylindrical rod.

14. A water dispenser comprising a pressure and flow measuring device according to any one of claims 1 to 13.

15. Use of a pressure and flow measurement device according to any one of claims 1 to 13 in the zone injection of water injection wells.

16. A method of stratified water injection, characterized in that a pressure and flow measuring device as claimed in any one of claims 1-13 is used.