Pipeline fluid measuring device

Abstract

The utility model discloses a pipeline fluid measuring device which comprises a liquid inlet filtering device and an impeller type fluid measuring device, the impeller type fluid measuring device comprises an impeller shell, an impeller, a magnet and a magnetic inductor, the impeller shell is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet of the impeller shell is communicated with the liquid inlet filtering device, and the first liquid outlet of the impeller shell is communicated with the magnetic inductor. The impeller shell is internally provided with an impeller in running fit with the impeller shell, the impeller is provided with a magnet, the magnet is matched with the magnetic inductor, and the device has the advantages of being simple in structure, low in cost, good in detection effect, high in applicability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid measurement, and specifically relates to a pipeline fluid measurement device. Background Art

[0002] In the prior art, an impeller flowmeter is used to obtain the flow rate of pipeline medium. The existing impeller flowmeter includes an impeller housing and an impeller arranged in the impeller housing. The impeller housing is provided with a liquid inlet and a liquid outlet. A magnet is installed on the impeller. When the impeller rotates, the magnet on the impeller rotates. The magnetic inductor will sense the change of the magnetic field of the magnet and convert these changes into electrical signals, so as to measure the rotation speed of the impeller. Then, according to the rotation speed of the impeller, the fluid flow rate in the pipeline can be obtained.

[0003] The deficiencies of the existing structure are as follows: First, impurities contained in the fluid will affect the rotation of the impeller, affecting the rotation speed measurement effect and measurement accuracy; Second, impurities in the fluid will corrode the impeller, affecting the service life of the impeller. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art, and provide a pipeline fluid measurement device with simple structure, low cost, good detection effect, long service life and strong applicability.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A pipeline fluid measurement device, characterized in that: it includes a liquid inlet filtering device and an impeller type fluid measurement device. The impeller type fluid measurement device includes an impeller housing, an impeller, a magnet and a magnetic inductor. The impeller housing is provided with a first liquid inlet and a first liquid outlet. The first liquid inlet of the impeller housing is communicated with the liquid inlet filtering device. An impeller rotatably matched with the impeller housing is arranged in the impeller housing. A magnet is installed on the impeller, and the magnet is matched with the magnetic inductor.

[0007] The fluid flow drives the impeller to rotate, and the magnet moves in a circular motion following the impeller. The rotation speed of the impeller is proportional to the flow velocity of the fluid. When the impeller rotates, the magnetic inductor will sense the change of the magnetic field of the magnet and convert these changes into electrical signals, so as to measure the rotation speed of the impeller. According to the rotation speed of the impeller, the pipeline fluid flow rate can be calculated. The setting of the liquid inlet filtering device can first filter out impurities in the fluid, prevent the impurities from affecting the rotation of the impeller, the measurement of the rotation speed and the corrosion of the impeller, ensure the measurement effect and measurement accuracy, can be applicable to a variety of working conditions, has a wide application range, and the impeller has a long service life.

[0008] The liquid inlet filtering device of the present utility model includes a liquid inlet housing and a filtering element. A second liquid inlet and a second liquid outlet are provided on the liquid inlet housing. The second liquid outlet of the liquid inlet housing is communicated with the first liquid inlet of the impeller housing. The filtering element is arranged in the liquid inlet housing.

[0009] The liquid inlet filtering device of the present utility model further includes a fluid locking mechanism. The liquid inlet housing is provided with an upper opening, and an upper liquid inlet cover is covered at the upper opening. The fluid locking mechanism includes a flow blocking sleeve, a connecting shaft, a connecting sleeve and a flow blocking plug. The flow blocking sleeve extends into the liquid inlet housing, and the lower end is communicated with the second liquid inlet of the liquid inlet housing. A diversion groove is provided on the flow blocking sleeve. The filtering element is in a cylindrical mesh structure and sleeved outside the flow blocking sleeve;

[0010] The connecting shaft, the connecting sleeve and the flow blocking plug are arranged in the flow blocking sleeve. The connecting sleeve is provided with an internal thread, and the connecting shaft is provided with an external thread. The connecting sleeve is threadedly connected with the connecting shaft;

[0011] The connecting sleeve is in vertical sliding fit with the flow blocking sleeve and the lower end is connected with the flow blocking plug. The rotation of the connecting shaft drives the connecting sleeve and the flow blocking plug to move vertically. The flow blocking plug is inserted into the second liquid inlet of the liquid inlet housing; or the connecting shaft is in vertical sliding fit with the flow blocking sleeve and the lower end is connected with the flow blocking plug. The rotation of the connecting sleeve drives the connecting shaft and the flow blocking plug to move vertically. The flow blocking plug is inserted into the second liquid inlet of the liquid inlet housing;

[0012] When it is necessary to replace or clean the filtering element, rotating the connecting sleeve can drive the connecting shaft and the flow blocking plug to move downward, or rotating the connecting shaft can drive the connecting sleeve and the flow blocking plug to move downward, so that the flow blocking plug is inserted into the second liquid inlet to block the inflow of fluid, facilitating the opening of the upper liquid inlet cover to take out and clean the filtering element. The structure is simple and the filtering element is convenient to clean.

[0013] A through hole penetrating up and down is provided on the upper liquid inlet cover of the present utility model. The flow blocking sleeve is inserted into the liquid inlet housing through the through hole;

[0014] The upper end of the connecting shaft or the connecting sleeve extends radially outward to form a shaft head. An internal limiting boss extends radially inward inside the flow blocking sleeve. The shaft head is limited by the internal limiting boss;

[0015] By rotating the shaft head, the flow blocking plug is driven to control the on-off of the fluid. The structure is simple and the operation is convenient.

[0016] The lower end of the flow blocking sleeve of the present utility model is connected to the first liquid inlet pipe, and the first liquid inlet pipe is inserted into the second liquid inlet. The lower end of the flow blocking sleeve extends radially outward to form an outer limiting boss, and the outer limiting boss abuts against the inside of the liquid inlet housing. The flow blocking sleeve is connected to the first liquid inlet pipe, and the flow blocking plug can control the on-off of the fluid in the first liquid inlet pipe. The cooperation of the flow blocking sleeve, the first liquid inlet pipe and the outer limiting boss is convenient for assembly and can limit the position of the flow blocking sleeve, while ensuring the sealing performance with the housing.

[0017] An O-ring seal is sleeved between the shaft head and the flow blocking sleeve, between the through hole of the flow blocking sleeve and the upper liquid inlet cover, and between the first liquid inlet pipe and the second liquid inlet.

[0018] The present utility model further includes a liquid outlet device, which includes a liquid outlet housing and a fluid locking mechanism. The liquid outlet housing is provided with an upper opening, a third liquid inlet and a third liquid outlet. The upper opening is covered with a liquid outlet upper cover. The third liquid inlet of the liquid outlet housing is communicated with the first liquid outlet of the impeller housing. The fluid locking mechanism includes a flow blocking sleeve, a connecting shaft, a connecting sleeve and a flow blocking plug. The flow blocking sleeve extends into the liquid outlet housing and is connected to the third liquid outlet of the liquid outlet housing at the lower end. A diversion groove is provided on the flow blocking sleeve.

[0019] The connecting shaft, the connecting sleeve and the flow blocking plug are arranged in the flow blocking sleeve. The connecting sleeve is provided with an internal thread, and the connecting shaft is provided with an external thread. The connecting sleeve is threadedly connected to the connecting shaft.

[0020] The connecting sleeve is vertically slidably matched with the flow blocking sleeve and is connected to the flow blocking plug at the lower end. The rotation of the connecting shaft drives the connecting sleeve and the flow blocking plug to move vertically, and the flow blocking plug is inserted into the third liquid outlet of the liquid outlet housing; or the connecting shaft is vertically slidably matched with the flow blocking sleeve and is connected to the flow blocking plug at the lower end. The rotation of the connecting sleeve drives the connecting shaft and the flow blocking plug to move vertically, and the flow blocking plug is inserted into the third liquid outlet of the liquid outlet housing.

[0021] When it is necessary to clean the filter element, first block the second liquid inlet through the fluid locking mechanism in the liquid inlet housing, and block the third liquid outlet through the fluid locking mechanism in the liquid outlet housing, effectively preventing fluid leakage.

[0022] A filter element is further provided in the liquid outlet housing of the present utility model, and the filter element is in a cylindrical mesh structure and is sleeved outside the flow blocking sleeve.

[0023] An impeller shaft is provided in the impeller housing of the present utility model. The impeller is sleeved on the impeller shaft. The upper surface of the impeller hub extends upward along the axial direction of the impeller to form a protrusion, and the position of the protrusion is higher than the impeller blade. The magnet is installed on the protrusion.

[0024] A rear guide slope with a smooth transitional connection is provided between the inner wall of the impeller housing of the present utility model and the first liquid outlet near the first liquid outlet, and the rotation direction of the impeller matches the inclination direction of the rear guide slope.

[0025] The beneficial effects of the present utility model are as follows: The impeller is driven to rotate by the fluid flow, the magnet moves in a circular motion following the impeller, the rotation speed of the impeller is proportional to the flow rate of the fluid. When the impeller rotates, the magnetic sensor will sense the magnetic field change of the magnet and convert these changes into electrical signals, and the rotation speed of the impeller can be measured. According to the rotation speed of the impeller, the fluid flow rate can be obtained. The setting of the liquid inlet filtering device can first filter out impurities in the fluid, prevent the impurities from affecting the rotation of the impeller, the measurement of the rotation speed and the corrosion of the impeller, ensure the measurement effect and measurement accuracy, can be applied to a variety of working conditions, has a wide application range, and the impeller has a long service life. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0027] Figure 2 It is a top view of the overall structure of the present utility model.

[0028] Figure 3 It is Figure 2 The A-A cross-sectional view in

[0029] Figure 4 It is a schematic diagram of the connection structure of the liquid inlet device, the impeller type fluid measurement device and the liquid outlet device.

[0030] Figure 5 It is Figure 4 The top view.

[0031] Figure 6 It is Figure 5 The B-B cross-sectional view in

[0032] Figure 7 It is a schematic diagram of the structure of the impeller type fluid measurement device.

[0033] Figure 8 It is Figure 7 The top view.

[0034] Figure 9 It is Figure 8 The C-C cross-sectional view in

[0035] Figure 10 It is a schematic diagram of the structure of the impeller type fluid measurement device with the impeller upper cover hidden.

[0036] Figure 11 It is a schematic diagram of the structure of the liquid inlet filtering device.

[0037] Figure 12 It is Figure 11Top view.

[0038] Figure 13 is Figure 12 the sectional view taken along D-D in the middle.

[0039] Figure 14 It is a schematic structural diagram of a fluid locking mechanism.

[0040] Figure 15 It is a sectional structural view of a liquid discharging device.

[0041] Reference numerals: housing - 1;

[0042] impeller type fluid measuring device - 2, impeller housing - 201, first liquid inlet - 2011, first liquid outlet - 2012, impeller upper cover - 202, upper cover limit ring - 2021, convex accommodation groove - 2022, impeller - 203, upper cover limit groove - 2031, convex - 2032, impeller shaft - 204, magnet placement groove - 205, magnetic inductor - 206, front guide wall - 2071, front guide inclined surface - 20711, rear guide wall - 2072, rear guide inclined surface - 20721;

[0043] liquid inlet filtering device - 3, liquid inlet housing - 301, liquid inlet upper cover - 302, limit ring - 3021, guide inclined surface - 30211, first liquid inlet pipe - 3031, first liquid outlet pipe - 3032, liquid inlet filter screen - 304;

[0044] liquid discharging device - 4, liquid discharging housing - 401, liquid discharging upper cover - 402, second liquid inlet pipe - 4031, second liquid outlet pipe - 4032, liquid discharging filter screen - 404;

[0045] O-ring - 5;

[0046] fluid locking mechanism - 6, flow blocking sleeve - 601, guide groove - 6011, outer limit boss - 6012, inner limit boss - 6013, guide groove - 6014, filter screen limit block - 6015, connecting sleeve - 6021, flow blocking plug - 6022, guide block - 6023, connecting shaft - 603, shaft head - 6031, slot - 6032, clamp - 604. Detailed implementation mode

[0047] The present utility model will be described below in conjunction with the accompanying drawings and embodiments.

[0048] As shown in the attached Figures 1 - 15As shown in the figure, a pipeline fluid measurement device includes a liquid inlet filtering device 3 and an impeller-type fluid measurement device 2. The impeller-type fluid measurement device 2 includes an impeller housing, an impeller 203, a magnet, and a magnetic inductor 206. An inlet port 2011 and an outlet port 2012 are provided on the impeller housing. The inlet port 2011 of the impeller housing is communicated with the liquid inlet filtering device. An impeller 203 that is rotationally matched with the impeller housing is arranged inside the impeller housing. A magnet is installed on the impeller 203. The magnet is matched with the magnetic inductor 206, and the magnetic inductor 206 is connected to a controller. In this embodiment, the controller can be a PLC controller or a controller developed based on an MCU;

[0049] The rotation of the impeller 203 is driven by the fluid flow. The magnet follows the impeller 203 to perform a circular motion. The rotation speed of the impeller is proportional to the flow rate of the fluid. When the impeller rotates, the magnetic inductor 206 will sense the magnetic field change of the magnet and convert these changes into electrical signals. The rotation speed of the impeller 203 can be measured. According to the rotation speed of the impeller 203, the fluid flow rate can be obtained. The setting of the liquid inlet filtering device 3 can first filter out the impurities in the fluid to prevent the impurities from affecting the rotation of the impeller 203, the measurement of the rotation speed, and the corrosion of the impeller 203, ensuring the measurement effect and measurement accuracy. It can be applied to a variety of working conditions, has a wide application range, and the impeller 203 has a long service life.

[0050] As shown in the attachment Figures 7 - 10 As shown in the figure, an upper opening is provided on the impeller housing 201. An impeller upper cover 202 is covered at the upper opening. An O-ring seal 5 is sleeved at the upper opening to ensure the sealing performance after the impeller upper cover 202 is covered. The impeller upper cover 202 is fixed to the impeller housing 201 by bolts.

[0051] An impeller 203 is arranged inside the impeller housing 201. The impeller 203 is sleeved on the impeller shaft 204 and is fixedly or rotatably connected to the impeller shaft 204. An annular protrusion 2032 extending upward is formed on the upper surface of the hub of the impeller 203 near the impeller shaft 204. A magnet placement groove 205 is provided on the upper surface of the protrusion 2032. The magnet is placed in the magnet placement groove 205. An annular upper cover limiting groove 2031 is opened downward on the upper surface of the hub of the impeller 203 outside the protrusion 2032.

[0052] A protrusion receiving groove 2022 with a downward opening is formed by the upward extension of the middle part of the impeller upper cover 202. The protrusion 2032 is inserted into the protrusion receiving groove 2022. The impeller upper cover 202 further extends upward in the protrusion receiving groove 2022 to form an impeller shaft upper limiting groove. An impeller shaft lower limiting groove is provided at the bottom of the impeller housing 201. In this embodiment, the impeller 203 is rotationally matched with the impeller shaft 204. The upper end of the impeller shaft 204 is inserted into the impeller shaft upper limiting groove, and the lower end is inserted into the impeller shaft lower limiting groove; it is convenient for assembly and maintenance.

[0053] On the inner wall of the upper cover 202 of the impeller, a upper cover limiting ring 2021 extends downward on the outer periphery of the convex accommodating groove 2022. The position of the upper cover limiting ring 2021 is matched with the position of the upper cover limiting groove 2031. When the upper cover 202 of the impeller covers the upper opening, the convex 2032 is inserted into the convex accommodating groove 2022, and the upper cover limiting ring 2021 is inserted into the upper cover limiting groove 2031. The cooperation between the upper cover limiting ring 2021 and the upper cover limiting groove 2031 not only facilitates the positioning and installation of the upper cover 202 of the impeller, but also can further effectively block the fluid in the impeller housing 201 from splashing onto the magnet through the upper cover limiting ring 2021.

[0054] On the inner wall of the impeller housing 201, a front guide wall 2071 and a rear guide wall 2072 are fixed. The front guide wall 2071 and the rear guide wall 2072 are arranged in an arc shape, and the arc opening faces the impeller 203 in the middle. The front guide wall 2071 and the rear guide wall 2072 are arranged opposite to each other front and back. A left opening communicating with the first liquid inlet 2011 is formed between the left sides of the front guide wall 2071 and the rear guide wall 2072, and a right opening communicating with the first liquid outlet 2012 is formed between the right sides of the front guide wall 2071 and the rear guide wall 2072.

[0055] At the right opening, the rear guide wall 2072 forms a rear guide inclined surface 20721 that is smoothly connected to the first liquid outlet 2012. At the right opening, the front guide wall 2071 forms a front guide inclined surface 20711 that is parallel to the rear guide inclined surface 20721.

[0056] The rotation direction of the impeller is matched with the inclination direction of the rear guide inclined surface 20721.

[0057] The setting of the rear guide inclined surface 20721 and its cooperation with the front guide inclined surface 20711 enable the fluid to flow out smoothly through this inclined surface from the liquid outlet, ensuring the efficiency of the impeller and the accuracy of the magnetic sensor detection.

[0058] In this embodiment, the inclination direction of the front guide inclined surface 20711 is tangent to the outer circle of the impeller. This direction is the tangent direction of the maximum force arm of the impeller, further enabling the impeller to have higher efficiency and ensuring the accuracy of the magnetic sensor detection.

[0059] As shown in the appendix Figures 11 - 14As shown, the liquid inlet filtering device 3 includes a liquid inlet housing 301 and a liquid inlet filter screen 304. A second liquid inlet and a second liquid outlet are formed on the liquid inlet housing 301. In this embodiment, the second liquid inlet is located at the bottom of the liquid inlet housing 301, and the second liquid outlet is located on the side wall of the liquid inlet housing 301. A first liquid outlet pipe 3032 is connected to the second liquid outlet of the liquid inlet housing. An O-ring seal 5 is sleeved at the connection between the first liquid outlet pipe 3032 and the second liquid outlet to ensure the liquid outlet sealing performance. The first liquid outlet pipe 3032 is communicated with the first liquid inlet 2011 of the impeller housing. The liquid inlet filter screen 304 is arranged in the liquid inlet housing 301 and is used to filter impurities in the fluid.

[0060] The liquid inlet housing 301 is provided with an upper opening, and a liquid inlet upper cover 302 is covered at the upper opening. In this embodiment, the liquid inlet upper cover 302 is fixed to the liquid inlet housing by bolts, and an O-ring seal is sleeved at the upper opening to achieve the seal with the liquid inlet upper cover. A fluid locking mechanism 6 is arranged in the liquid inlet housing 301. The fluid locking mechanism 6 includes a flow blocking sleeve 601, a connecting shaft 603, a connecting sleeve 6021 and a flow blocking plug 6022. The lower end of the flow blocking sleeve 601 is communicated with the second liquid inlet of the liquid inlet housing 301. A plurality of diversion grooves 6014 are formed on the flow blocking sleeve 601. The liquid inlet filter screen 304 adopts a cylindrical mesh structure and is sleeved outside the flow blocking sleeve 601.

[0061] The connecting shaft 603, the connecting sleeve 6021 and the flow blocking plug 6022 are arranged in the flow blocking sleeve 601. The connecting sleeve 6021 is provided with internal threads, and the connecting shaft 603 is provided with external threads. The connecting shaft 603 is in threaded connection with the connecting sleeve 6021.

[0062] The connecting sleeve is in vertical sliding fit with the flow blocking sleeve and is connected to the flow blocking plug at the lower end. The rotation of the connecting shaft drives the connecting sleeve and the flow blocking plug to move vertically, and the flow blocking plug is inserted into the second liquid inlet of the liquid inlet housing; or the connecting shaft is in vertical sliding fit with the flow blocking sleeve and is connected to the flow blocking plug at the lower end. The rotation of the connecting sleeve drives the connecting shaft and the flow blocking plug to move vertically, and the flow blocking plug is inserted into the second liquid inlet of the liquid inlet housing.

[0063] In this embodiment, a flow blocking plug 6022 is fixedly connected to the lower end of the connecting sleeve 6021. The flow blocking plug 6022 is arranged in an inverted cone shape. A guide block 6023 is fixedly connected to the side wall of the connecting sleeve 6021. A vertically arranged guide groove 6011 is formed on the flow blocking sleeve 601. The guide block 6023 is in vertical sliding fit with the guide groove 6011. The rotation of the connecting shaft 603 drives the connecting sleeve 6021 and the flow blocking plug 6022 to move up and down.

[0064] A through hole penetrating up and down is provided on the liquid inlet upper cover 302. The flow blocking sleeve 601 is inserted into the liquid inlet housing 301 through the through hole. An O-ring seal is provided between the flow blocking sleeve 601 and the through hole. An inner limiting boss 6013 is formed by radially inward extension at the upper end inside the flow blocking sleeve 601. A circumferentially arranged limiting groove is provided on the inner wall of the upper end of the flow blocking sleeve 601 above the inner limiting boss 6013.

[0065] The lower end of the flow blocking sleeve 601 is connected to the first liquid inlet pipe 3031. The first liquid inlet pipe 3031 is inserted into the second liquid inlet. An O-ring seal 5 is provided between the first liquid inlet pipe 3031 and the second liquid inlet. An outer limiting boss 6012 is formed by radially outward extension at the lower end of the flow blocking sleeve 601. The outer limiting boss 6012 abuts against the inside of the liquid inlet housing 301. By connecting the flow blocking sleeve 601 and the first liquid inlet pipe 3031, the on-off of the fluid in the first liquid inlet pipe can be controlled by the flow blocking plug 6022. The cooperation of the flow blocking sleeve 601, the first liquid inlet pipe 3031 and the outer limiting boss 6012 is convenient for assembly and can limit the position of the flow blocking sleeve 601, while ensuring the sealing performance with the housing.

[0066] A filter screen limiting block 6015 is formed by radially outward extension on the outer limiting boss 6012 at the lower end of the flow blocking sleeve 601. The outer diameter of the filter screen limiting block 6015 is smaller than the outer diameter of the outer limiting boss 6012. The outer periphery of the filter screen limiting block 6015 is provided with a guiding inclined surface that slopes outward from top to bottom. The liquid inlet filter screen is sleeved outside the filter screen limiting block 6015. The filter screen limiting block 6015 can not only limit the liquid inlet filter screen, but also play a guiding role in the installation of the liquid inlet filter screen, facilitating the installation of the liquid inlet filter screen.

[0067] An axle head 6031 is formed by radially outward extension at the upper end of the connecting shaft 603. The connecting shaft 603 is inserted into the flow blocking sleeve. The lower end surface of the axle head 6031 abuts against the inner limiting boss. The upper end surface of the axle head 6031 is limited by a clamp 604 stuck in the limiting groove. The position of the axle head 6031 is limited to ensure that the axle head 6031 will not move up and down, and it is convenient for installation and disassembly during assembly.

[0068] A slot 6032 or a handle is provided on the axle head 6031. It is convenient for the rotation of the axle head to drive the movement of the flow blocking plug. By rotating the axle head 6031, the flow blocking plug 6022 is driven to control the on-off of the fluid. The structure is simple and the operation is convenient.

[0069] In this embodiment, a slot 6032 is provided on the axle head 6031. The slot 6032 is a hexagonal hole. An inner hexagon wrench is inserted into the hexagonal hole, and the rotation of the inner hexagon wrench drives the rotation of the connecting shaft. The slot can also be a long slot. A flat head screwdriver is inserted into the long slot, and the rotation of the flat head screwdriver drives the rotation of the connecting shaft.

[0070] An O-ring seal is sleeved between the shaft head and the flow blocking sleeve 601 to ensure the sealing effect.

[0071] In this embodiment, a circumferentially arranged limiting ring 3021 is fixed to the lower surface of the liquid inlet upper cover 302. The liquid inlet upper cover 302 covers the upper opening of the liquid inlet housing 301. The limiting ring 3021 is inserted into the upper opening, and the outer wall of the limiting ring 3021 abuts against the inner wall of the liquid inlet housing 301. An O-ring seal 5 is provided between the outer wall of the limiting ring 3021 and the inner wall of the housing.

[0072] The upper end of the liquid inlet filter screen 304 is located between the limiting ring 3021 and the flow blocking sleeve 601, and the lower end is sleeved outside the filter screen limiting block 6015. The upper surface of the liquid inlet filter screen 304 abuts against the lower surface of the liquid inlet upper cover 302, and the lower surface of the liquid inlet filter screen 304 abuts against the upper surface of the outer limiting boss 6012.

[0073] The setting of the limiting ring 3021 can limit the liquid inlet upper cover 302 to ensure that the liquid inlet upper cover 302 is accurately covered at the upper opening position of the housing. The limiting ring 302 cooperates with the filter screen limiting block 6015 to limit the liquid inlet filter screen 304 to ensure the stability of the placement of the liquid inlet filter screen 304.

[0074] The lower end of the inner wall of the limiting ring 3021 is provided with an annular guiding inclined surface 30211 that inclines inward from bottom to top.

[0075] The setting of the guiding inclined surface 30211 facilitates the prior removal of the liquid inlet upper cover 302 when the liquid inlet filter screen 304 needs to be removed, and also facilitates the assembly of the liquid inlet upper cover 302 after the liquid inlet filter screen 304 is cleaned and installed.

[0076] As shown in the appendix Figure 15As shown, it further includes a liquid outlet device 4. The liquid outlet device 4 includes a liquid outlet housing 401 and a fluid locking mechanism 6. In this application, the structure of the fluid locking mechanism in the liquid outlet housing is the same as that in the liquid inlet housing, and the structure of the liquid outlet upper cover is the same as that of the liquid inlet upper cover, which will not be described in detail here. The liquid outlet housing 401 is provided with an upper opening, a liquid inlet three, and a liquid outlet three. The upper opening is covered with a liquid outlet upper cover 402. In this embodiment, the liquid outlet upper cover 402 is fixed to the liquid outlet housing 401 by bolts. An O-ring seal 5 is sleeved at the upper opening. In this embodiment, the liquid inlet three is located on the side wall of the liquid outlet housing, and the liquid outlet three is located at the bottom of the liquid outlet housing 401. The liquid inlet three of the liquid outlet housing 401 is connected to a second liquid inlet pipe 4031. An O-ring seal 5 is sleeved at the connection between the second liquid inlet pipe 4031 and the liquid inlet three. The second liquid inlet pipe 4031 is communicated with the liquid outlet one of the impeller housing. The fluid locking mechanism includes a flow blocking sleeve 601, a connecting shaft 603, a connecting sleeve 6021, and a flow blocking plug 6022. The flow blocking sleeve 601 extends into the liquid outlet housing and is connected to a second liquid outlet pipe 4032 at the lower end. The second liquid outlet pipe 4032 is inserted into the liquid outlet three of the liquid outlet housing. A diversion groove 6014 is formed on the flow blocking sleeve 601;

[0077] The connecting shaft 603, the connecting sleeve 6021, and the flow blocking plug 6022 are arranged in the flow blocking sleeve 601. The connecting sleeve 6021 is provided with internal threads, and the connecting shaft 603 is provided with external threads. The connecting sleeve and the connecting shaft are threadedly connected. The lower end of the connecting sleeve 6021 is connected to the flow blocking plug 6022. The connecting sleeve 6021 is in vertical sliding fit with the flow blocking sleeve 601. The rotation of the connecting shaft 603 drives the connecting sleeve 6021 and the flow blocking plug 6022 to move vertically. The flow blocking plug 6022 is inserted into the second liquid outlet pipe 4032; When it is necessary to clean the liquid inlet filter screen 304, first block the liquid inlet two through the fluid locking mechanism in the liquid inlet housing, and block the liquid outlet three through the fluid locking mechanism in the liquid outlet housing to effectively prevent fluid leakage.

[0078] A liquid outlet filter screen 404 is further arranged in the liquid outlet housing. The liquid outlet filter screen 404 adopts a cylindrical mesh structure and is sleeved outside the flow blocking sleeve 601.

[0079] In this embodiment, the pipeline fluid measuring device is fixed in the housing 1. The upper end of the housing is provided with an opening, which is covered with a housing upper cover. The left side of the housing upper cover is provided with an upper left opening, and the right side is provided with an upper right opening. The left side of the bottom of the housing is provided with a lower left opening, and the right side is provided with a lower right opening. The shaft head of the fluid locking mechanism in the liquid inlet housing is located at the position of the upper left opening, the shaft head of the fluid locking mechanism in the liquid outlet housing is located at the position of the upper right opening, the first liquid inlet pipe 3031 is located at the position of the lower left opening, and the second liquid outlet pipe 4032 is located at the position of the lower right opening. The magnetic sensor 206 is fixed inside the housing 1, and the position is close to the position of the magnet on the impeller.

[0080] When the utility model is in use:

[0081] 1. The fluid enters the flow - resistance sleeve 601 in the liquid - inlet housing through the first liquid - inlet pipe 3031, passes through the diversion groove 6014 of the flow - resistance sleeve 601, is filtered by the liquid - inlet filter screen 304, then successively enters the impeller housing 201 through the first liquid - outlet pipe 3032 and the first liquid - inlet port 2011 of the impeller housing 201. The fluid flow drives the impeller 203 to rotate, and the magnet moves in a circular motion following the impeller 203. When the impeller 203 rotates, the magnetic inductor 206 can sense the magnetic - field change of the magnet and convert these changes into electrical signals, and the rotation speed of the impeller 203 can be measured. Then the fluid flows through the first liquid - outlet port 2012 of the impeller housing, the second liquid - inlet pipe 4031, the liquid - outlet filter screen 404, and the diversion groove 6014 of the flow - resistance sleeve 601 in the liquid - outlet housing and then flows out from the second liquid - outlet pipe 4032;

[0082] 2. When it is necessary to clean the liquid - inlet filter screen 304 and the liquid - outlet filter screen 404, insert the hexagon wrench into the shaft - head slot at the position of the liquid - inlet housing and rotate it forward, driving the connecting shaft 603 to rotate forward. The connecting sleeve 6021 and the flow - resistance plug 6022 move downward along the guiding groove 6011 of the flow - resistance sleeve 601. The flow - resistance plug 6022 is inserted into the first liquid - inlet pipe 3031. Insert the hexagon wrench into the shaft - head slot at the position of the liquid - outlet housing 401 and rotate it forward, driving the connecting shaft 603 to rotate forward. The connecting sleeve 6021 and the flow - resistance plug 6022 move downward along the guiding groove 6011 of the flow - resistance sleeve 601. The flow - resistance plug 6022 is inserted into the second liquid - outlet pipe 4032;

[0083] 3. Open the upper cover of the outer shell, and then open the upper liquid - inlet cover 302. Take out the liquid - inlet filter screen 304 in the liquid - inlet housing 301 for cleaning. After cleaning, insert the liquid - inlet filter screen 304 into the liquid - inlet housing 301, and it is guided and limited by the filter - screen limiting block 6015. Cover the upper liquid - inlet cover 302. Open the upper liquid - outlet cover 402, take out the liquid - outlet filter screen 404 in the liquid - outlet housing 401 for cleaning. After cleaning, insert the liquid - outlet filter screen 404 into the liquid - outlet housing 401, and it is guided and limited by the filter - screen limiting block 6015. Cover the upper liquid - outlet cover 402 and the upper cover of the outer shell;

[0084] 4. Insert the hexagon wrench into the shaft - head slot at the position of the liquid - inlet housing and rotate it reversely, driving the connecting shaft 603 to rotate reversely. The connecting sleeve 6021 and the flow - resistance plug 6022 move upward along the guiding groove 6011 of the flow - resistance sleeve 601, and the flow - resistance plug 6022 is removed from the first liquid - inlet pipe 3031. Insert the hexagon wrench into the shaft - head slot at the position of the liquid - outlet housing 401 and rotate it reversely, driving the connecting shaft 603 to rotate reversely. The connecting sleeve 6021 and the flow - resistance plug 6022 move upward along the guiding groove 6011 of the flow - resistance sleeve 601, and the flow - resistance plug 6022 is removed from the second liquid - outlet pipe 4032.

Claims

1. A pipeline fluid measuring device, characterized in that: It comprises a liquid inlet filtering device and an impeller-type fluid measuring device, wherein the impeller-type fluid measuring device comprises an impeller housing, an impeller, a magnet and a magnetic sensor, wherein a liquid inlet port 1 and a liquid outlet port 1 are provided on the impeller housing, the liquid inlet port 1 of the impeller housing is connected with the liquid inlet filtering device, an impeller which is rotatably matched with the impeller housing is provided in the impeller housing, a magnet is installed on the impeller, and the magnet matches with the magnetic sensor.

2. A pipeline fluid measuring device according to claim 1, characterized in that: The liquid inlet filter device comprises a liquid inlet housing and a filter element. The liquid inlet housing is provided with a second liquid inlet and a second liquid outlet. The second liquid outlet of the liquid inlet housing is connected to the first liquid inlet of the impeller housing. The filter element is arranged in the liquid inlet housing.

3. A pipeline fluid measuring device according to claim 2, characterized in that: The liquid inlet filter device also includes a fluid locking mechanism, the liquid inlet housing is provided with an upper opening, the upper opening is covered with a liquid inlet upper cover, the fluid locking mechanism includes a flow blocking sleeve, a connecting shaft, a connecting sleeve and a flow blocking plug, the flow blocking sleeve extends into the liquid inlet housing, and the lower end is connected to the liquid inlet port of the liquid inlet housing, a guide groove is provided on the flow blocking sleeve, and the filter element adopts a cylindrical mesh structure and is sleeved outside the flow blocking sleeve; The connecting shaft, the connecting sleeve and the flow-blocking plug are arranged in the flow-blocking sleeve, the connecting sleeve is provided with an internal thread, the connecting shaft is provided with an external thread, and the connecting sleeve is threadedly connected to the connecting shaft; The connecting sleeve and the baffle sleeve are vertically slidably matched and the lower end is connected to the baffle plug. The connecting shaft rotates to drive the connecting sleeve and the baffle plug to move vertically, and the baffle plug is inserted into the second liquid inlet of the liquid inlet shell; or the connecting shaft and the baffle sleeve are vertically slidably matched and the lower end is connected to the baffle plug. The connecting sleeve rotates to drive the connecting shaft and the baffle plug to move vertically, and the baffle plug is inserted into the second liquid inlet of the liquid inlet shell.

4. A pipeline fluid measuring device according to claim 3, characterized in that: The liquid inlet upper cover is provided with a through hole extending vertically, and the baffle sleeve is inserted into the liquid inlet housing through the through hole; The upper end of the connecting shaft or the connecting sleeve extends radially outward to form a shaft head, and the interior of the baffle sleeve extends radially inward to form an inner limiting boss, and the shaft head is limited by the inner limiting boss.

5. A pipeline fluid measuring device according to claim 4, characterized in that: The lower end of the baffle sleeve is connected to the first liquid inlet pipe, and the first liquid inlet pipe is inserted into the second liquid inlet port. The lower end of the baffle sleeve extends radially outward to form an outer limiting boss, and the outer limiting boss abuts against the inside of the liquid inlet housing.

6. A pipeline fluid measuring device according to claim 5, characterized in that: O-shaped sealing rings are sleeved between the shaft head and the baffle sleeve, between the baffle sleeve and the through hole of the liquid inlet upper cover, and between the first liquid inlet pipe and the second liquid inlet port.

7. A pipeline fluid measuring device according to claim 3 or 4 or 5 or 6, characterized in that: It also includes a liquid outlet device, the liquid outlet device includes a liquid outlet housing and a fluid locking mechanism, the liquid outlet housing is provided with an upper opening, a third liquid inlet and a third liquid outlet, the upper opening is covered with a liquid outlet upper cover, the third liquid inlet of the liquid outlet housing is communicated with the first liquid outlet of the impeller housing, the fluid locking mechanism includes a baffle sleeve, a connecting shaft, a connecting sleeve and a baffle plug, the baffle sleeve extends into the liquid outlet housing, the lower end is communicated with the third liquid outlet of the liquid outlet housing, and a guide groove is provided on the baffle sleeve; The connecting shaft, the connecting sleeve and the flow-blocking plug are arranged in the flow-blocking sleeve, the connecting sleeve is provided with an internal thread, the connecting shaft is provided with an external thread, and the connecting sleeve and the connecting shaft are threadedly connected; The connecting sleeve and the baffle sleeve are vertically slidably matched and the lower end is connected to the baffle plug. The connecting shaft rotates to drive the connecting sleeve and the baffle plug to move vertically, and the baffle plug is inserted into the third liquid outlet of the liquid outlet shell; or the connecting shaft and the baffle sleeve are vertically slidably matched and the lower end is connected to the baffle plug. The connecting sleeve rotates to drive the connecting shaft and the baffle plug to move vertically, and the baffle plug is inserted into the third liquid outlet of the liquid outlet shell.

8. A pipeline fluid measuring device according to claim 7, characterized in that: A filter is also arranged in the liquid outlet housing, and the filter adopts a cylindrical mesh structure and is sleeved outside the flow-blocking sleeve.

9. A pipeline fluid measuring device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8, characterized in that: An impeller shaft is arranged in the impeller housing, the impeller is sleeved on the impeller shaft, the upper surface of the impeller hub extends upward along the impeller axis to form a protrusion, the protrusion is located higher than the impeller blades, and the magnet is mounted on the protrusion.

10. A pipeline fluid measuring device according to claim 9, characterized in that: A rear guide slope with a smooth transition connection is provided between the inner wall of the impeller housing near the first liquid outlet and the first liquid outlet, and the rotation direction of the impeller matches the inclination direction of the rear guide slope.

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