Flow measurement system for through-wall reflux pump

Abstract

The utility model discloses a flow measuring system for a through-wall reflux pump, which relates to the technical field of through-wall reflux pumps and comprises a concrete pool component, a hoisting component, an embedded mounting component, a through-wall reflux pump component, a flow measuring component, a lift measuring component and a power distribution and control component. The concrete pool assembly stores test water through a concrete pool embedded underground, and guardrails are installed on the periphery of the concrete pool. The through-wall reflux pump assembly hoisting concrete platform is used for bearing and placing the hoisting assembly. According to the through-wall reflux pump calibrated by the measuring system, the actual flow under the current working condition can be quantitatively calculated; the measurement precision of the actual flow and lift is improved, the error between the flow curve of the through-wall reflux pump and the actual working condition is reduced, the refinement degree of the treatment process of a sewage plant is improved, and the risk that dissolved matter of treated water exceeds the standard and the treatment cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wall-piercing reflux pumps, in particular to a flow measurement system for wall-piercing reflux pumps. Background Technique

[0002] The wall-piercing reflux pump is a product developed on the basis of the production technology of submersible mixers. It is generally used for the treatment of nitrification liquid reflux in sewage treatment plants. It has the characteristics of small power, low head, and large flow during the working process; during the sewage treatment process, the control of the size of the nitrification liquid return flow directly affects the treatment effect. When the nitrification liquid return flow is insufficient, the total nitrogen in the effluent will exceed the standard, while too large an internal return flow will waste electric energy. At the same time, too much dissolved oxygen reflux will also waste denitrifying carbon sources, and too fast a flow rate will also affect the effective removal efficiency of chemical oxygen demand and ammonia nitrogen.

[0003] Conventional wall-piercing reflux pumps do not have flow display and cannot quantitatively give the relationship between frequency and flow. Even if the manufacturer provides the relationship between head and flow at the factory, it is usually a copy of the curve in the manual, which has a large deviation from the actual flow; although during sewage treatment operation, operators can calculate the working condition flow of the internal reflux pump according to the curve relationship provided by the equipment manufacturer of the wall-piercing reflux pump or the rated flow, frequency converter frequency, and estimated head of the use scenario, the flow curve of general wall-piercing reflux pumps has a very large error from the actual working condition, and the head also changes with factors such as the size of the return flow and the size of the influent flow. Therefore, the calculated flow has a large deviation, which is not conducive to the refined operation of the sewage treatment plant process, and there is a risk of exceeding the standard or increasing the operation cost. For this reason, we propose a flow measurement system for wall-piercing reflux pumps that can quantitatively detect the relationship between frequency and flow. Summary of the Invention

[0004] The purpose of the utility model is to provide a flow measurement system for wall-piercing reflux pumps to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model adopts a flow measurement system for wall-piercing reflux pumps. The flow measurement system includes a concrete pool assembly, a hoisting assembly, a pre-embedded installation assembly, a wall-piercing reflux pump assembly, a flow measurement assembly, a head measurement assembly, and a power distribution and control assembly, where:

[0006] The concrete pool assembly stores test water through a concrete pool embedded in the ground. The main body of the concrete pool is made of reinforced concrete. The length inside the pool is 8m - 10m, the width is 2m - 3m, and the depth is 3m - 4m. The wall thickness of the concrete pool is 0.3m, and the effective water depth is 3m - 3.5m. The effective water depth can be adjusted as needed. There is 90m 3 -105m 3A muddy water mixture. At both ends of the top of the concrete pool, there are symmetrically cast concrete platforms for hoisting the through-wall reflux pump assembly and the flow measurement assembly, each with a length of 5 m and a width of 3.5 m. Guardrails are installed around the concrete pool.

[0007] The concrete platform for hoisting the through-wall reflux pump assembly is used to carry and place the hoisting assembly, and the bottom of the hoisting assembly is fixed at the connection between the concrete platform for hoisting the through-wall reflux pump assembly and the top of the concrete pool; the concrete platform for hoisting the flow measurement assembly is used to place the power distribution and control assembly.

[0008] The embedded installation assembly is embedded in the concrete pool assembly, and the through-wall reflux pump assembly and the flow measurement assembly are respectively connected to both ends of the embedded installation assembly.

[0009] The through-wall reflux pump assembly includes a reflux pump main machine installation bracket, a reflux pump main machine, a reflux pump side pressure sensor, and an anti-winding and anti-rotation cyclone group. The through-wall reflux pump assembly is installed and tested for the reflux pump main machine.

[0010] The flow measurement assembly is fixed on the surface of the embedded stainless steel pipe, and the flow measurement assembly is used to measure the flow rate, flow velocity, and pressure of the through-wall reflux pump.

[0011] The head measurement assembly includes an adjustable weir gate weir plate fixed to the top of the partition wall of the concrete pool. One end of the adjustable weir gate weir plate is connected to an adjustable weir gate lead screw, and the upper end of the adjustable weir gate lead screw is fixed with an adjustable weir gate hoist; a reflux pump side static pressure type liquid level gauge and a flow measurement side static pressure type liquid level gauge are fixed to the inner bottom of the concrete pool; a sludge concentration gauge is fixed to the inner wall of the concrete pool. The head measurement assembly measures the internal pressure and liquid level of the flow measurement system and adjusts the liquid level difference on both sides of the measurement system.

[0012] As a further solution of the present utility model: At both ends of the top of the concrete pool, there are symmetrically cast concrete platforms for hoisting the through-wall reflux pump assembly and the flow measurement assembly.

[0013] The inner wall of the concrete pool is poured with a concrete platform for installing the regulating weir gate hoist. A reserved hole for the screw rod of the regulating weir gate hoist is provided at the top of the concrete platform for installing the regulating weir gate hoist. The reserved hole for the screw rod of the regulating weir gate hoist is reserved and a steel plate is embedded when the concrete platform for installing the regulating weir gate hoist is in the state of reinforced concrete pouring. The aperture of the reserved hole for the screw rod of the regulating weir gate hoist is 0.15 m. The center position of the reserved hole is 0.175 m away from the leftmost side of the concrete platform for installing the regulating weir gate hoist and 1.825 m away from the rightmost side of the concrete platform for installing the regulating weir gate hoist. The reserved hole for the screw rod of the regulating weir gate hoist is used for installing the screw rod of the regulating weir gate. The inner bottom of the concrete pool forms a concrete support pier for the flow measurement component and a concrete pool partition wall. The main body of the concrete support pier for the flow measurement component is made of reinforced concrete and is integrally poured with the main body of the concrete pool. The main body of the concrete support pier for the flow measurement component is 0.3 m wide, 0.8 m long and 0.8 m high. The center of the main body of the concrete support pier is 2.95 m away from the rightmost inner wall of the concrete pool, centered and 3 m away from the other two inner walls of the concrete pool. The main body of the concrete support pier for the flow measurement component is used for supporting the flow measurement component and absorbing the vibration generated by the flow measurement component; The main body of the concrete pool partition wall is made of reinforced concrete and is integrally poured with the concrete pool. The main body of the concrete pool partition wall is 3 m wide, 3 m long, 3 m high and 0.15 m thick. The main body of the concrete pool partition wall is used for installing the test system pre-embedded and fixed installation components;

[0014] On the inner wall of the concrete pool partition, a concrete limit for the regulating weir gate is formed, and a reserved hole for installing the weir plate of the regulating weir gate is provided at the top of the concrete pool partition wall; The main body of the concrete limit for the regulating weir gate is made of reinforced concrete, and the main body of the concrete limit for the regulating weir gate is integrally poured with the concrete pool partition wall. The main body of the concrete limit for the regulating weir gate is 0.08 m wide, 3 m long and 0.1 m high, and is located inside the concrete pool partition wall. The main body of the concrete limit for the regulating weir gate is used to adjust the lowest point of the weir plate of the regulating weir gate and play a limiting role.

[0015] As a further solution of the present utility model: The lifting assembly includes a traveling beam. At both ends of the bottom of the traveling beam, a traveling support column on the side of the return pump and a traveling support column on the side of the flow measurement are respectively fixed. A main traveling support column in the center is fixed between the concrete platform for installing the regulating weir gate hoist and the traveling beam. The main body of the concrete platform for installing the regulating weir gate hoist is made of reinforced concrete and is integrally poured with the concrete pool. The concrete platform for installing the regulating weir gate hoist is 3.6 m wide, 2 m long and 0.2 m thick. When the reinforced concrete is poured, a reserved hole for the screw rod of the regulating weir gate hoist is reserved and a steel plate is embedded. The concrete platform for installing the regulating weir gate hoist is used for the installation load bearing of the regulating weir gate hoist;

[0016] The bottoms of the traveling support column on the side of the return pump and the traveling support column on the side of the flow measurement are respectively fixed to the top of the concrete pool;

[0017] At both ends of the bottom of the traveling beam, a traveling main machine on the reflux pump side and a traveling main machine on the flow measurement side are respectively fixed. A hoisting wire on the reflux pump side is fixed on the traveling main machine on the reflux pump side. The bottom of the hoisting wire on the reflux pump side is fixed with a hoisting ring on the reflux pump side. The traveling beam is an I-beam and is supported by a main traveling support column in the center, a traveling support column on the reflux pump side, and a traveling support column on the flow measurement side. The traveling beam serves as the traveling track for the traveling main machine on the reflux pump side and the traveling main machine on the flow measurement side. The main traveling support column in the center is an I-beam and is used to support the traveling beam. The main traveling support column in the center is an I-beam and is used to support the traveling beam. The main traveling support column in the center is an I-beam and is used to support the traveling beam. The traveling main machine on the reflux pump side is an outdoor waterproof stainless steel traveling main machine with a maximum hoisting weight of [tons]. The traveling main machine on the reflux pump side is used to hoist the equipment on the reflux pump side. The traveling main machine on the flow measurement side is an outdoor waterproof stainless steel traveling main machine, and the maximum hoisting weight of the traveling main machine on the flow measurement side is [tons]. The traveling main machine on the flow measurement side is used to hoist the equipment on the flow measurement side;

[0018] The bottom of the traveling main machine on the flow measurement side is fixed with a hoisting ring on the flow measurement side at the bottom of the hoisting wire on the flow measurement side. The hoisting wire on the reflux pump side is a special steel wire rope for cranes, with good tensioning performance, strong load-bearing capacity, and waterproof and rust-proof properties. The maximum bearing weight of the hoisting wire on the reflux pump side is [tons]. The hoisting wire on the reflux pump side is connected to the traveling main machine on the reflux pump side and is used to hoist the equipment on the reflux pump side. The hoisting ring on the reflux pump side is a high-strength rotating hoisting ring with a quick-release structure and a maximum load-bearing capacity of [tons]. It is mainly used to connect the hoisting wire on the reflux pump side and the installation bracket of the reflux pump main machine. The hoisting ring on the flow measurement side is a high-strength rotating hoisting ring with a quick-release structure and a maximum load-bearing capacity of [tons]. The hoisting ring on the flow measurement side is used to connect the hoisting wire on the flow measurement side and the straight pipe for the flow velocity meter. The main body of the installation bracket of the reflux pump main machine is made of stainless steel. The installation bracket of the reflux pump main machine is welded into a C shape by I-shaped stainless steel, and the installation bracket of the reflux pump main machine has multiple hoisting holes. The installation bracket of the reflux pump main machine is connected to the hoisting ring on the reflux pump side. The right side of the installation bracket of the reflux pump main machine is coupled and limited in cooperation with the reflux pump assembly through a guiding limiting groove. Different hole positions are opened at the lower end of the installation bracket of the reflux pump main machine. The different hole positions can be fitted and installed with different models of the reflux pump main machine, so as to play the role of installing the wall-piercing reflux pump assembly; The reflux pump main machine can be selected to install and use the corresponding model of the test reflux pump according to needs. After the reflux pump main machine is connected to the cable transfer box, it is connected to the power distribution control box.

[0019] As a further solution of the present utility model: The embedded installation component includes an embedded stainless steel pipe penetrating and fixed in the partition wall of the concrete water tank. The main body of the embedded stainless steel pipe is embedded in the partition wall of the concrete water tank. The main body of the embedded stainless steel pipe is welded to one side of the partition wall of the concrete water tank and the flange on the side of the return pump. The main body of the embedded stainless steel pipe is welded to the other side of the flange on the flow measurement side. The main body of the embedded stainless steel pipe is used for water passing and bearing the wall-piercing return pump assembly and the flow measurement assembly.

[0020] Flange on the side of the return pump and flange on the flow measurement side are respectively welded at both ends of the embedded stainless steel pipe. The lower end of the flange on the side of the return pump is connected with the coupling limit of the return pump assembly. The bottom of the flange on the flow measurement side is fixed with the coupling limit of the flow measurement assembly. The bottom surface of the flange on the side of the return pump is welded with the coupling limit of the return pump assembly.

[0021] Installation positioning guides for the return pump assembly and the flow measurement assembly are respectively fixed at both ends of the top of the embedded stainless steel pipe. The main body of the coupling limit of the return pump assembly is made of stainless steel and is welded to the bottom of the flange on the side of the return pump. The installation positioning guide for the return pump assembly is a stainless steel pipe. The bottom of the return pump assembly is welded to the embedded stainless steel pipe, and the upper part of the return pump assembly is connected to the partition wall of the concrete water tank. The return pump assembly is used in cooperation with the installation bracket of the return pump main unit and is used to guide the lifting and lowering of the wall-piercing return pump assembly. The flange on the flow measurement side is a stainless steel flange, and the bottom surface of the flange on the flow measurement side is welded with the coupling limit of the flow measurement assembly.

[0022] The main body of the coupling limit of the flow measurement assembly is made of stainless steel and is welded to the bottom of the flange on the flow measurement side. The bottom of the installation positioning guide for the flow measurement assembly is welded to the embedded stainless steel pipe, and the upper part of the installation positioning guide for the flow measurement assembly is connected to the partition wall of the concrete water tank. The installation positioning guide for the flow measurement assembly is used in cooperation with the guide groove on the straight pipe of the flowmeter installation and is used to guide the lifting and lowering of the flow measurement assembly. The pressure sensor on the side of the return pump is a high-precision pressure sensor. After being connected to the cable transfer box, the pressure sensor on the side of the return pump is connected to the power distribution control box and is used for pressure measurement.

[0023] As a further solution of the present utility model: The anti-winding and anti-rotation cyclone group includes a DN500 - 600 anti-winding and anti-rotation cyclone, a DN400 - 600 anti-winding and anti-rotation cyclone, and a DN300 - 600 anti-winding and anti-rotation cyclone.

[0024] As a further solution of the utility model: The flow measurement assembly includes a flowmeter installation straight pipe fixed on the surface of the embedded stainless steel pipe, an external clamp type ultrasonic flowmeter, a current meter installation straight pipe, a current meter, and a flow measurement side pressure sensor. The upper part of one flange of the flowmeter installation straight pipe has a guiding groove and is used in cooperation with the flow measurement assembly installation positioning guide rail. The middle part of the other flange of the flowmeter installation straight pipe is coupled with a limiting hook and is connected to the flange on one side of the current meter installation straight pipe. An insertion type electromagnetic flowmeter installation hole is opened in the middle of the top of the flowmeter installation straight pipe, and the insertion type electromagnetic flowmeter installation hole is used for installing the external clamp type ultrasonic flowmeter;

[0025] The external clamp type ultrasonic flowmeter is installed in the middle of the flowmeter installation straight pipe. After being connected to the cable transfer box, it is connected to the power distribution control box. The external clamp type ultrasonic flowmeter is used for flow measurement, and the measurement results of the external clamp type ultrasonic flowmeter are mutually verified with those of the insertion type electromagnetic flowmeter and the current meter;

[0026] An insertion type electromagnetic flowmeter is connected to the top of the external clamp type ultrasonic flowmeter; The insertion type electromagnetic flowmeter is integrally designed and installed on the insertion type electromagnetic flowmeter installation hole at the middle position of the top of the main body of the flowmeter installation straight pipe. The insertion type electromagnetic flowmeter is used for flow measurement, and its measurement results are mutually verified with those of the external clamp type ultrasonic flowmeter and the current meter;

[0027] The main body of the current meter installation straight pipe is a stainless steel pipe. The flange on one side of the current meter installation straight pipe is connected to the flange on the other side of the flowmeter installation straight pipe. The flange on the other side of the flowmeter installation straight pipe is connected to the flange on one side of the check valve. The top of the current meter installation straight pipe is connected to the flow measurement side lifting ring through a lifting hook. A current meter installation hole is opened at the middle position of the top of the current meter installation straight pipe, and a flow measurement side pressure sensor installation hole is opened at the end of the top of the current meter installation straight pipe;

[0028] The current meter is a propeller type current meter. After being connected to the cable transfer box, it is connected to the power distribution control box. The current meter is used for current measurement and its measurement results are mutually verified with those of the external clamp type ultrasonic flowmeter and the insertion type electromagnetic flowmeter;

[0029] The main body of the flow measurement side pressure sensor is a high-precision pressure sensor. After being connected to the cable transfer box, it is connected to the power distribution control box. The flow measurement side pressure sensor is used for measuring the water pressure at the end of the pipe. The difference between the measurement results of the flow measurement side pressure sensor and the return pump side pressure sensor is the boost value of the return pump main engine, and the actual working head of the return pump main engine can be calculated through this difference;

[0030] One end of the embedded stainless steel pipe is connected with a check valve, which plays the role of stopping water and simulating the actual working conditions during operation.

[0031] As a further solution of the utility model: a surge-proof sleeve of the static pressure type liquid level gauge on the reflux pump side is connected through the surface of the static pressure type liquid level gauge on the reflux pump side, and a surge-proof sleeve of the static pressure type liquid level gauge on the flow measurement side is connected to the surface of the static pressure type liquid level gauge on the flow measurement side.

[0032] As a further solution of the utility model: the power distribution and control components are fixed on the top of the hoisting concrete platform of the flow measurement components. The power distribution and control components include a control room cabin, a power distribution control box, a system host computer, a cable transfer box and a PLC touch screen; the power distribution control box and the system host computer are respectively installed in the control room cabin. The main body of the control room cabin is a sandwich fireproof cabin. The control room cabin is installed on the hoisting concrete platform of the flow measurement components. The sandwich fireproof board has double-layer glass sliding windows and a fire door. The control room cabin is used to place the power distribution control box, the system host computer and the personnel control office equipment;

[0033] The outer shell of the power distribution control box is made of stainless steel. The power distribution control box is installed in the control room cabin. The power distribution control box is composed of components such as a PLC touch screen, in-situ control buttons, internal circuit components of the box, control software, a switch, etc. The power distribution control box is used to supply power to the equipment in the measurement system and control the start and stop of the reflux pump main engine. On the other hand, the power distribution control box also plays a role in controlling and adjusting the opening of the regulating weir gate hoist. The power distribution control box collects data of the pressure sensor on the reflux pump side, external clamp-on ultrasonic flowmeter, insertion electromagnetic flowmeter, current meter, pressure sensor on the flow measurement side, static pressure type liquid level gauge on the reflux pump side, static pressure type liquid level gauge on the flow measurement side, and sludge concentration meter;

[0034] The system host computer is a high-performance host computer and is installed in the control room cabin;

[0035] The outer shell of the cable transfer box is made of stainless steel and is installed on the hoisting concrete platform of the regulating weir gate hoist. The inside of the outer shell of the cable transfer box contains a wiring row, which is mainly used for the transfer of power cables and signal cables of the reflux pump main engine, pressure sensor on the reflux pump side, external clamp-on ultrasonic flowmeter, insertion electromagnetic flowmeter, current meter, pressure sensor on the flow measurement side, regulating weir gate hoist, etc.;

[0036] The in-situ control buttons are composed of an emergency stop switch, two change-over switches, two fault display lights and five illuminated switch buttons, and are used to control the start and stop of the test reflux pump main engine and the regulating weir gate hoist.

[0037] As a further solution of the utility model: when starting the test, start the main engine of the through-wall return pump and adjust the instrument in the flow measurement system by the gate hoist of the regulating weir; the gate hoist of the regulating weir is an intelligent opening control integrated electric actuator, the gate hoist of the regulating weir has a cast iron base, the opening is displayed on the surface of the gate hoist of the regulating weir through a display screen, a conductive plastic potentiometer is installed in the switch control box of the gate hoist of the regulating weir as an indication signal of the proportional regulating type electric actuator, the potentiometer of the gate hoist of the regulating weir compares and amplifies the resistance value that changes with the stroke of the output shaft, the comparison amplifier outputs a current indication signal, after the gate hoist of the regulating weir is connected to the cable transfer box, it is connected to the power distribution control box, and the gate hoist of the regulating weir is used to control the up and down movement of the screw rod of the regulating weir, so as to accurately control the movement path of the weir plate of the regulating weir.

[0038] As a further solution of the utility model: the screw rod of the regulating weir is used to cooperate with the gate hoist of the regulating weir and connect the weir plate of the regulating weir; the weir plate of the regulating weir is a stainless steel weir plate, the weir plate of the regulating weir is subjected to single-sided pressure, and the weir plate of the regulating weir is used to adjust the opening of the regulating weir.

[0039] As a further solution of the utility model: the static pressure type liquid level gauge on the return pump side and the static pressure type liquid level gauge on the flow measurement side are respectively static pressure type liquid level gauges, the static pressure type liquid level gauge on the return pump side and the static pressure type liquid level gauge on the flow measurement side are respectively installed in the anti-wave casing of the static pressure type liquid level gauge on the return pump side, the static pressure type liquid level gauge on the return pump side and the static pressure type liquid level gauge on the flow measurement side respectively have an ultrasonic and aeration self-cleaning system, the static pressure type liquid level gauge on the return pump side and the static pressure type liquid level gauge on the flow measurement side are respectively connected to the power distribution control box, and the static pressure type liquid level gauge on the return pump side and the static pressure type liquid level gauge on the flow measurement side are respectively used to cooperate with the pressure sensor on the return pump side to measure the water surface level on one side of the through-wall return pump assembly.

[0040] As a further solution of the utility model: the anti-wave casing of the static pressure type liquid level gauge on the return pump side and the anti-wave casing of the static pressure type liquid level gauge on the flow measurement side are both stainless steel pipes, a plurality of water inlet holes are respectively opened at the lower bottom parts of the anti-wave casing of the static pressure type liquid level gauge on the return pump side and the anti-wave casing of the static pressure type liquid level gauge on the flow measurement side, the anti-wave casing of the static pressure type liquid level gauge on the return pump side and the anti-wave casing of the static pressure type liquid level gauge on the flow measurement side are both installed outside the static pressure type liquid level gauge on the return pump side, and the anti-wave casing of the static pressure type liquid level gauge on the return pump side and the anti-wave casing of the static pressure type liquid level gauge on the flow measurement side are both used for the protection of the static pressure type liquid level gauge on the return pump side and to prevent the influence on the measurement of the static pressure type liquid level gauge on the return pump side after the main engine of the return pump is started.

[0041] As a further solution of the utility model: the sludge concentration meter is connected to the power distribution control box and measures the concentration of the sludge in the water used in the concrete pool by using a variety of sensor measurement principles, so as to facilitate the preparation of the sludge concentration of the test water according to the test requirements.

[0042] The flow measurement method further includes:

[0043] Set measurement parameters on the touch screen of the distribution control box and start automatic measurement. The PLC touch screen is used to control and display various parameters of the measurement system test.

[0044] As a further solution of the present utility model: after completing the automatic measurement, an encrypted data file is generated by the system host computer and imported into the control box. The control box displays the actual flow rate of the current return pump according to the actual frequency of the return pump main unit and the pressure value of the pressure sensor.

[0045] Compared with the prior art, the beneficial effects of the present utility model are:

[0046] 1. The present utility model can quantitatively calculate the actual flow rate under the current working conditions through the wall-piercing return pump calibrated by the measurement system, improve the measurement accuracy of the actual flow rate and head, reduce the error between the flow rate curve of the wall-piercing return pump and the actual working conditions, enhance the refinement degree of the sewage treatment process in the sewage treatment plant, and reduce the risk of excessive dissolved substances in the treated water and the treatment cost.

[0047] 2. The present utility model effectively reduces the civil engineering cost consumed to determine the actual flow rate of the wall-piercing return pump, greatly improves the convenience of measuring the relationship between the head and the flow rate, the relationship between the frequency and the flow rate, as well as the stability and reliability of the calculated actual flow rate.

[0048] 3. The present utility model only needs one network cable to communicate with other PLCs, and can directly obtain the flow rate data of the wall-piercing return pump, which is convenient for the operation personnel to adjust and control the sewage treatment process; in engineering applications, the main equipment of the wall-piercing return pump with flow rate display can be hoisted for water maintenance, without having to empty the water tank or carry out underwater operations, greatly reducing the maintenance time and maintenance cost. At the same time, the measurement system has a wide adaptability, simple structure, flexible installation, stable connection and high measurement automation degree. Brief Description of the Drawings

[0049] Figure 1 is the overall system schematic diagram of the present utility model;

[0050] Figure 2 is the installation schematic diagram of the hoisting component of the present utility model;

[0051] Figure 3 is the top view of the concrete pool component of the present utility model;

[0052] Figure 4 is the sectional structure schematic diagram of the regulating weir gate opening of the concrete pool component of the present utility model;

[0053] Figure 5 is the sectional view of the regulating weir gate limit of the concrete pool component of the present utility model;

[0054] Figure 6 It is a schematic diagram of the installation of the head measurement component of the present utility model;

[0055] Figure 7 It is a schematic diagram of anti-winding, anti-rotation and variable diameter of the wall-piercing reflux pump component of the present utility model;

[0056] Figure 8 It is a schematic diagram of the power distribution and control component of the present utility model;

[0057] Figure 9 It is a schematic diagram of the touch screen of the control component of the present utility model;

[0058] Figure 10 It is the general schematic diagram page of the operation software of the control component of the present utility model;

[0059] Figure 11 It is the parameter setting page of the operation software of the control component of the present utility model;

[0060] Figure 12 It is the data filtering page of the operation software of the control component of the present utility model;

[0061] Figure 13 It is the general schematic diagram of the engineering application of the wall-piercing reflux pump after the flow measurement of the present utility model is completed.

[0062] In the figure: 1. Concrete pool assembly; 2. Lifting assembly; 3. Embedded installation assembly; 4. Wall-piercing reflux pump assembly; 5. Flow measurement assembly; 6. Head measurement assembly; 7. Power distribution and control assembly; 11. Concrete pool; 12. Concrete platform for lifting the wall-piercing reflux pump assembly; 13. Concrete platform for lifting the flow measurement assembly; 14. Concrete platform for installing the regulating weir gate hoist; 15. Reserved hole for the screw rod of the regulating weir gate hoist; 16. Concrete support pier for the flow measurement assembly; 17. Partition wall of the concrete pool; 18. Concrete limit for the regulating weir gate; 19. Reserved hole for installing the weir plate of the regulating weir gate; 20. I-beam; 21. Crane beam; 221. Main support column at the center of the crane; 222. Crane support column on the reflux pump side; 223. Crane support column on the flow measurement side; 231. Crane main machine on the reflux pump side; 232. Crane main machine on the flow measurement side; 233. Lifting wire on the reflux pump side; 234. Lifting wire on the flow measurement side; 235. Lifting ring on the reflux pump side; 236. Lifting ring on the flow measurement side; 31. Embedded stainless steel pipe; 321. Flange on the reflux pump side; 322. Coupling limit for the reflux pump assembly; 323. Installation positioning guide rail for the reflux pump assembly; 331. Flange on the flow measurement side; 332. Coupling limit for the flow measurement assembly; 333. Installation positioning guide rail for the flow measurement assembly; 41. Installation bracket for the reflux pump main machine; 42. Reflux pump main machine; 43. Pressure sensor on the reflux pump side; 44. DN600 anti-winding and anti-rotation cyclone; 45. DN500 - 600 anti-winding and anti-rotation cyclone; 46. DN400 - 600 anti-winding and anti-rotation cyclone; 47. DN300 - 600 anti-winding and anti-rotation cyclone; 51. Straight pipe for installing the flowmeter; 511. External clamp type ultrasonic flowmeter; 512. Insert type electromagnetic flowmeter; 52. Straight pipe for installing the current meter; 521. Current meter; 522. Pressure sensor on the flow measurement side; 53. Check valve; 61. Regulating weir gate hoist; 62. Screw rod of the regulating weir gate; 63. Weir plate of the regulating weir gate; 641. Static pressure type liquid level gauge on the reflux pump side; 642. Static pressure type liquid level gauge on the flow measurement side; 651. Anti-wave casing for the static pressure type liquid level gauge on the reflux pump side; 652. Anti-wave casing for the static pressure type liquid level gauge on the flow measurement side; 66. Sludge concentration meter; 71. Control room shed; 72. Power distribution control box; 73. System host computer; 74. Cable transfer box; 721. PLC touch screen; 7211. Software interface of the PLC touch screen; 722. Local control button; 731. "General drawing" interface of the host computer measurement software; 732. "Parameter setting" interface of the host computer measurement software; 733. "Data filtering" interface of the host computer measurement software. Detailed implementation manners

[0063] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0064] As Figure 1 shown in the overall system schematic diagram of the present invention, the present invention provides a flow measurement system for a wall-piercing return pump. The flow measurement system includes a concrete pool assembly 1, a hoisting assembly 2, a pre-embedded installation assembly 3, a wall-piercing return pump assembly 4, a flow measurement assembly 5, a head measurement assembly 6, and a power distribution and control assembly 7.

[0065] As Figure 3 shown in the top view of the concrete pool assembly of the present invention, the concrete pool assembly 1 stores test water through the concrete pool 11 embedded in the ground. The main body of the concrete pool 11 is made of reinforced concrete, with a length of 8m - 10m, a width of 2m - 3m, and a depth of 3m - 4m inside the pool. The wall thickness of the concrete pool 11 is 0.3m, and the effective water depth is 3m - 3.5m, which can be adjusted according to needs. There is 90m 3 -105m 3 of muddy water mixture accumulated in the concrete pool 11. At both ends of the top of the concrete pool 11, a wall-piercing return pump assembly hoisting concrete platform 12 and a flow measurement assembly hoisting concrete platform 13 with a length of 5m and a width of 3.5m are symmetrically cast. Guardrails are installed around the concrete pool 11;

[0066] Preferably, the wall-piercing return pump assembly hoisting concrete platform 12 is used to carry and place the hoisting assembly 2, and the bottom of the hoisting assembly 2 is fixed at the connection between the wall-piercing return pump assembly hoisting concrete platform 12 and the top of the concrete pool 11; the flow measurement assembly hoisting concrete platform 13 is used to place the power distribution and control assembly 7;

[0067] Preferably, the pre-embedded installation assembly 3 is pre-embedded in the concrete pool assembly 1, and the wall-piercing return pump assembly 4 and the flow measurement assembly 5 are respectively connected to both ends of the pre-embedded installation assembly 3;

[0068] Preferably, the wall-piercing return pump assembly 4 includes a return pump main machine installation bracket 41, a return pump main machine 42, a return pump side pressure sensor 43, and an anti-winding and anti-rotation cyclone group 44. The wall-piercing return pump assembly 4 installs and tests the wall-piercing return pump main machine;

[0069] Preferably, the flow measurement assembly 5 is fixed on the surface of the pre-embedded stainless steel pipe 31, and the flow measurement assembly 5 is used to measure the flow rate, flow velocity, and pressure of the wall-piercing return pump;

[0070] As Figure 6 shown in the installation schematic diagram of the head measurement component of the present utility model, the head measurement component 6 includes a regulating weir gate weir plate 63 fixed to the top of the partition wall 17 of the concrete water tank. One end of the regulating weir gate weir plate 63 is connected to a regulating weir gate screw rod 62, and the upper end of the regulating weir gate screw rod 62 is fixed with a regulating weir gate hoist 61. A backflow pump side static pressure type liquid level gauge 641 and a flow measurement side static pressure type liquid level gauge 642 are fixed to the inner bottom of the concrete water tank 11. A sludge concentration gauge 66 is fixed to the inner wall of the concrete water tank 11. The head measurement component 6 measures the internal pressure and liquid level of the flow measurement system and adjusts the liquid level difference on both sides of the measurement system.

[0071] Preferably, hoisting concrete platforms 12 for the through-wall backflow pump assembly and hoisting concrete platforms 13 for the flow measurement component are symmetrically cast at both ends of the top of the concrete water tank 11.

[0072] Preferably, a concrete platform 14 for installing the regulating weir gate hoist is cast on the inner wall of the concrete water tank 11. A reserved hole 15 for the regulating weir gate screw rod is opened at the top of the concrete platform 14 for installing the regulating weir gate hoist. The reserved hole 15 for the regulating weir gate screw rod is reserved and a steel plate is embedded when the concrete platform 14 for installing the regulating weir gate hoist is in the state of reinforced concrete pouring. The aperture of the reserved hole 15 for the regulating weir gate screw rod is 0.15 m. The center position of the reserved hole is 0.175 m away from the leftmost side of the concrete platform 14 for installing the regulating weir gate hoist and 1.825 m away from the rightmost side of the concrete platform 14 for installing the regulating weir gate hoist. The reserved hole 15 for the regulating weir gate screw rod is used to install the regulating weir gate screw rod 62.

[0073] As Figure 5 shown in the sectional schematic diagram of the regulating weir gate limit of the concrete water tank component of the present utility model, a flow measurement component concrete support pier 16 and a partition wall 17 of the concrete water tank are formed on the inner bottom of the concrete water tank 11. The flow measurement component concrete support pier 16 is made of reinforced concrete and is integrally cast with the main body of the concrete water tank 11. The flow measurement component concrete support pier 16 is 0.3 m wide, 0.8 m long and 0.8 m high. The center of the main body of the support pier 16 is 2.95 m away from the rightmost inner wall of the concrete water tank 11, centered and 3 m away from the other two inner walls of the concrete water tank 11. The flow measurement component concrete support pier 16 is used to support the flow measurement component 5 and absorb the vibration generated by the flow measurement component 5. The partition wall 17 of the concrete water tank is made of reinforced concrete and is integrally cast with the concrete water tank 11. The partition wall 17 of the concrete water tank is 3 m wide, 3 m long, 3 m high and the wall thickness is 0.15 m. The partition wall 17 of the concrete water tank is used to install the test system embedded and fixed installation component 3.

[0074] As Figure 4The figure shows a schematic cross-sectional structure diagram of the adjustable weir gate opening of the concrete pool assembly of the present utility model. An adjustable weir gate concrete limiting platform 18 is formed on the inner wall of the concrete pool partition wall 17, and a reserved hole 19 for installing the weir gate plate is provided at the top of the concrete pool partition wall 17; the adjustable weir gate concrete limiting platform 18 is made of reinforced concrete, integrally cast with the concrete pool 17 partition wall. The adjustable weir gate concrete limiting platform 18 is 0.08 m wide, 3 m long, and 0.1 m high, and is located inside the concrete pool partition wall 17. The adjustable weir gate concrete limiting platform 18 is used to adjust the lowest point of the weir gate plate 63 and plays a limiting role.

[0075] As Figure 2 The figure shows a schematic installation diagram of the hoisting assembly of the present utility model. The hoisting assembly 2 includes a traveling beam 21. At both ends of the bottom of the traveling beam 21, a reflux pump side traveling support column 222 and a flow measurement side traveling support column 223 are respectively fixed. A traveling center main support column 221 is fixed between the adjustable weir gate hoist installation concrete platform 14 and the traveling beam 21. The main body of the adjustable weir gate hoist installation concrete platform 14 is made of reinforced concrete and integrally cast with the concrete pool 11. The adjustable weir gate hoist installation concrete platform 14 is 3.6 m wide, 2 m long, and 0.2 m thick. When the reinforced concrete is poured, a reserved hole 15 for the adjustable weir gate hoist screw rod and a buried steel plate are reserved. The adjustable weir gate hoist installation concrete platform 14 is used for the installation bearing of the adjustable weir gate hoist 61;

[0076] Preferably, the bottoms of the reflux pump side traveling support column 222 and the flow measurement side traveling support column 223 are respectively fixed to the top of the concrete pool 11;

[0077] Preferably, at both ends of the bottom of the traveling cross beam 21, a traveling main machine 231 on the reflux pump side and a traveling main machine 232 on the flow measurement side are respectively fixed. A hoisting wire 233 on the reflux pump side is fixed on the traveling main machine 231 on the reflux pump side. At the bottom of the hoisting wire 233 on the reflux pump side, a hoisting ring 235 on the reflux pump side is fixed. The traveling cross beam 21 is an I-beam 20. The length of the traveling cross beam 21 is 16 m. The traveling cross beam 21 is supported by a main traveling support column 221 at the center, a traveling support column 222 on the reflux pump side, and a traveling support column 223 on the flow measurement side. The height of the traveling cross beam 21 from the hoisting concrete platform 13 of the flow measurement assembly is 4 m. The traveling cross beam 21 serves as the traveling track for the traveling main machine 231 on the reflux pump side and the traveling main machine 232 on the flow measurement side. The main traveling support column 221 at the center is an I-beam 20. The length of the main traveling support column 221 at the center is 4 m. The main traveling support column 221 at the center is used to support the traveling cross beam 21. The main traveling support column 221 at the center is an I-beam 20. The length of the main traveling support column 221 at the center is 4 m. The main traveling support column 221 at the center is used to support the traveling cross beam 21. The main traveling support column 221 at the center is an I-beam 20. The length of the main traveling support column 221 at the center is 4 m. The main traveling support column 221 at the center is used to support the traveling cross beam 21. The traveling main machine 231 on the reflux pump side is an outdoor waterproof stainless steel traveling main machine with a maximum hoisting weight of 3 tons. The traveling main machine 231 on the reflux pump side is used to hoist the equipment on the reflux pump side. The traveling main machine 232 on the flow measurement side is an outdoor waterproof stainless steel traveling main machine. The maximum hoisting weight of the traveling main machine 232 on the flow measurement side is 3 tons. The traveling main machine 232 on the flow measurement side is used to hoist the equipment on the flow measurement side;

[0078] Preferably, a lifting ring 236 is fixed to the bottom of the traffic main unit 232 on the flow measurement side, and a lifting wire 234 is fixed to the bottom of the lifting ring 236 on the flow measurement side. The lifting wire 233 on the return pump side is a 13-mm high-strength special steel wire rope for cranes, with good tensioning performance, strong load-bearing capacity, waterproof and rust-proof properties. The maximum load-bearing capacity of the lifting wire 233 on the return pump side is 9 tons. The lifting wire 233 on the return pump side is connected to the traffic main unit 231 on the return pump side and is used to lift the equipment on the return pump side. The lifting ring 235 on the return pump side is a high-strength rotating lifting ring with a quick-release structure and a maximum load-bearing capacity of 6 tons. It is mainly used to connect the lifting wire 233 on the return pump side and the installation bracket 41 of the return pump main unit. The lifting ring 236 on the flow measurement side is a high-strength rotating lifting ring with a quick-release structure and a maximum load-bearing capacity of 6 tons. The lifting ring 236 on the flow measurement side is used to connect the lifting wire 234 on the flow measurement side and the straight pipe 52 for flow velocity meter installation. The main body of the installation bracket 41 of the return pump main unit is made of stainless steel. The installation bracket 41 of the return pump main unit is welded into a C shape by I-shaped stainless steel. The total length of the upper end of the installation bracket 41 of the return pump main unit is 2.25 m, and the installation bracket 41 of the return pump main unit has multiple lifting holes. The installation bracket 41 of the return pump main unit is connected to the lifting ring 235 on the return pump side. The right side of the installation bracket 41 of the return pump main unit is used in conjunction with the coupling limit 322 of the return pump assembly through a guiding limit groove. The total length of the lower end of the installation bracket 41 of the return pump main unit is 0.7 m and is provided with different hole positions, which can be fitted and installed with return pump main units 42 of different models, thus playing the role of installing the wall-piercing return pump assembly 4. The return pump main unit 42 can be selected and installed with a corresponding model of test return pump according to needs. The conventional models of the return pump main unit 42 are DN300, DN400, DN500, and DN600. After the return pump main unit 42 is connected to the cable transfer box 74, it is connected to the power distribution control box 72.

[0079] Preferably, the embedded installation component 3 includes an embedded stainless steel pipe 31 penetrating and fixed in the concrete water tank partition wall 17. The main body 31 of the embedded stainless steel pipe is a DN600 stainless steel pipe. The main body 31 of the embedded stainless steel pipe is 2.7 m long and has a wall thickness of 9 mm. The main body 31 of the embedded stainless steel pipe is embedded in the concrete water tank partition wall 17, and the two pipe heads protrude 0.35 m from both sides of the concrete water tank partition wall 17. The bottom of the pipe is 0.8 m from the bottom of the concrete water tank 11 and is horizontally centered. The main body 31 of the embedded stainless steel pipe is welded to one side of the concrete water tank partition wall 17 and the return pump side flange 321, and the main body 31 of the embedded stainless steel pipe is welded to the other side of the flow measurement side flange 331. The main body 31 of the embedded stainless steel pipe is used for water passing and bearing the wall-piercing return pump assembly 4 and the flow measurement assembly 5.

[0080] Preferably, both ends of the embedded stainless steel pipe 31 are welded with a reflux pump side flange 321 and a flow measurement side flange 331 respectively. The lower end of the reflux pump side flange 321 is connected with a reflux pump assembly coupling limit 322, and the bottom of the flow measurement side flange 331 is fixed with a flow measurement assembly coupling limit 332. The reflux pump side flange 321 is a DN600 stainless steel flange, the thickness of the reflux pump side flange 321 is 22.5 mm, the lower bottom surface of the reflux pump side flange 321 is welded with the reflux pump assembly coupling limit 322, and the reflux pump side flange 321 is in contact with the DN600 stainless steel flange to stop water leakage;

[0081] Preferably, both ends of the top of the embedded stainless steel pipe 31 are respectively fixed with a reflux pump assembly installation positioning guide rail 323 and a flow measurement assembly installation positioning guide rail 333. The main body of the reflux pump assembly coupling limit 322 is made of stainless steel, and one side of the reflux pump assembly coupling limit 322 has a 45° guiding slope. The reflux pump assembly coupling limit 322 is welded to the bottom of the reflux pump side flange 321. The reflux pump assembly coupling limit 322 is used to guide and limit the DN600 stainless steel flange on the other side of the wall-piercing reflux pump assembly 4. The reflux pump assembly installation positioning guide rail 323 is a DN120 stainless steel pipe, the length of the reflux pump assembly 323 is 1.6 m, the bottom of the reflux pump assembly 323 is welded to the embedded stainless steel pipe 31, the upper part of the reflux pump assembly 323 is connected to the concrete water tank partition wall 17 and is 10 cm away from one side wall of the concrete water tank partition wall 17. The reflux pump assembly 323 is used in cooperation with the reflux pump main machine installation bracket 41, and the reflux pump assembly 323 is used to guide the lifting and lowering of the wall-piercing reflux pump assembly 4; The flow measurement side flange 331 is a DN600 stainless steel flange, the thickness of the flow measurement side flange 331 is 22.5 mm, the lower bottom surface of the flow measurement side flange 331 is welded with the flow measurement assembly coupling limit 332, and the flow measurement side flange 331 is used to contact the DN600 stainless steel flange on the other side of the flow measurement assembly 5 to stop water leakage;

[0082] Preferably, the main body of the flow measurement component coupling limit 332 is made of stainless steel. One side of the flow measurement component coupling limit 332 has a 45° guiding slope. The flow measurement component coupling limit 332 is welded to the bottom of the flow measurement side flange 331. The flow measurement component coupling limit 332 is used to guide and limit the DN600 stainless steel flange on the left side of the flow measurement component 5. The flow measurement component installation and positioning guide rail 333 is a 120mm*120mm cross-shaped stainless steel guiding column with a cross-shaped stainless steel thickness of 18mm. The bottom of the flow measurement component installation and positioning guide rail 333 is welded to the 31 embedded stainless steel pipe, and the upper part of the flow measurement component installation and positioning guide rail 333 is connected to the 17 concrete pool partition wall. The flow measurement component installation and positioning guide rail 333 is 10cm away from the wall on one side of the 17 concrete pool partition wall. The flow measurement component installation and positioning guide rail 333 is used in cooperation with the guiding groove on the flowmeter installation straight pipe 51. The flow measurement component installation and positioning guide rail 333 is used to guide the lifting and lowering of the flow measurement component 5. The measurement range of the return pump side pressure sensor 43 is 0-2 bar, and the measurement accuracy is ±0.05%. After being connected to the cable transfer box 74, the return pump side pressure sensor 43 is connected to the power distribution control box 72. The return pump side pressure sensor 43 is used for pressure measurement.

[0083] As Figure 7 Shown is a schematic diagram of the anti-winding and anti-rotation variable diameter of the wall-piercing return pump assembly of the present utility model. The anti-winding and anti-rotation cyclone group 44 includes a DN500-600 anti-winding and anti-rotation cyclone 45, a DN400-600 anti-winding and anti-rotation cyclone 46, and a DN300-600 anti-winding and anti-rotation cyclone 47. The main bodies of the DN500-600 anti-winding and anti-rotation cyclone 45, the DN400-600 anti-winding and anti-rotation cyclone 46, and the DN300-600 anti-winding and anti-rotation cyclone 47 are all made of stainless steel. The DN500-600 anti-winding and anti-rotation cyclone 45, the DN400-600 anti-winding and anti-rotation cyclone 46, and the DN300-600 anti-winding and anti-rotation cyclone 47 are all composed of an anti-winding and anti-rotation cyclone barrel, a DN600 inlet and outlet flange, a coupling limit hook, an anti-winding and anti-rotation vane, and an anti-winding cutter. The DN500-600 anti-winding and anti-rotation cyclone 45, the DN400-600 anti-winding and anti-rotation cyclone 46, and the DN300-600 anti-winding and anti-rotation cyclone 47 respectively resist the water flow through the return pump main unit 42 of the DN600 model and the return pump side flange 321 to prevent fibrous garbage in the sewage from winding around equipment such as the anti-rotation vane plate, the insertion type electromagnetic flowmeter 512, and the 521 current meter.

[0084] As Figure 8The following is a schematic diagram of the power distribution and control components of the present utility model. The flow measurement component 5 includes a flowmeter installation straight pipe 51 fixed on the surface of the embedded stainless steel pipe 31, an external clamp type ultrasonic flowmeter 511, a current meter installation straight pipe 52, a current meter 521, and a flow measurement side pressure sensor 522. The main body of the flowmeter installation straight pipe 51 is a DN600 stainless steel pipe. The flowmeter installation straight pipe 51 is 0.6 m long. The upper part of one flange of the flowmeter installation straight pipe 51 has a guide groove and is used in cooperation with the flow measurement component installation positioning guide rail 333. The middle part of the other flange of the flowmeter installation straight pipe 51 is coupled with a limit hook and is connected to the flange on one side of the current meter installation straight pipe 52. An insertion type electromagnetic flowmeter installation hole 512 is opened in the middle of the top of the flowmeter installation straight pipe 51. The insertion type electromagnetic flowmeter installation hole 512 is used to install the external clamp type ultrasonic flowmeter 511;

[0085] Preferably, the external clamp type ultrasonic flowmeter 511 is installed in the middle of the flowmeter installation straight pipe 51. By adopting floating-point operation and cooperating with MODBUS communication, it can achieve a measurement range of 0 - 10000 m 3 / h and a measurement accuracy of ±2 m 3 / h. After the external clamp type ultrasonic flowmeter 511 is connected to the cable transfer box 74, it is connected to the power distribution control box 72. The external clamp type ultrasonic flowmeter 511 is used for flow measurement, and the measurement results of the external clamp type ultrasonic flowmeter 511, the insertion type electromagnetic flowmeter 512, and the current meter 521 are mutually verified;

[0086] Preferably, an insertion type electromagnetic flowmeter 512 is connected to the top of the external clamp type ultrasonic flowmeter 511; the insertion type electromagnetic flowmeter 512 is integrally designed and installed on the insertion type electromagnetic flowmeter installation hole 512 at the middle position of the top of the main body of the flowmeter installation straight pipe 51. The insertion type electromagnetic flowmeter 512 is used for flow measurement, and its measurement results are mutually verified with the measurement results of the external clamp type ultrasonic flowmeter 511 and the current meter 521;

[0087] Preferably, the main body of the current meter installation straight pipe 52 is a DN600 stainless steel pipe. The current meter installation straight pipe 52 is 1.2 m long. The flange on one side of the current meter installation straight pipe 52 is connected to the flange on the other side of the flowmeter installation straight pipe 51. The flange on the other side of the flowmeter installation straight pipe 51 is connected to the flange on one side of the check valve 53. The top of the current meter installation straight pipe 52 is connected to the flow measurement side lifting ring 236 through a lifting hook. A current meter installation hole 521 is opened at the center position of the top of the current meter installation straight pipe 52. A flow measurement side pressure sensor installation hole 522 is opened at the end of the top of the current meter installation straight pipe 52;

[0088] Preferably, the current meter 521 is a propeller current meter. After being connected to the cable transfer box 74, the current meter 521 is connected to the power distribution control box 72. The measurement range of the current meter 521 is 0.01 - 8 m / s, and the measurement accuracy of the current meter 521 is ±1%. The current meter 521 is used for current measurement and verifies the measurement results with those of the external clamp-on ultrasonic flowmeter 511 and the insertion electromagnetic flowmeter 512;

[0089] Preferably, the main body of the flow measurement side pressure sensor 522 is a high-precision pressure sensor. The measurement range of the flow measurement side pressure sensor 522 is 0 - 2 bar, and the measurement accuracy of the flow measurement side pressure sensor 522 is ±0.05%. After being connected to the cable transfer box 74, the flow measurement side pressure sensor 522 is connected to the power distribution control box 72. The flow measurement side pressure sensor 522 is used for measuring the water pressure at the end of the pipe. The difference between the measurement results of the flow measurement side pressure sensor 522 and the return pump side pressure sensor 43 is the boost value of the return pump main unit 42, and the actual working head of the return pump main unit 42 can be calculated through this difference;

[0090] Preferably, one end of the embedded stainless steel pipe 31 is connected with a check valve 53. The check valve 53 is a DN600 stainless steel flap check valve, which plays the role of water stop and simulating the actual working conditions during operation.

[0091] Preferably, a surge-proof sleeve 651 for the return pump side static pressure type liquid level gauge is connected through the surface of the return pump side static pressure type liquid level gauge 641, and a surge-proof sleeve 652 for the flow measurement side static pressure type liquid level gauge is connected to the surface of the flow measurement side static pressure type liquid level gauge 642.

[0092] As Figure 9 shown is a schematic diagram of the touch screen of the control component of the present utility model. The power distribution and control component 7 is fixed on the top of the concrete platform 13 for hoisting the flow measurement component. The power distribution and control component 7 includes a control room panel house 71, a power distribution control box 72, a system host computer 73, a cable transfer box 74, and a PLC touch screen 721; The power distribution control box 72 and the system host computer 73 are respectively installed in the control room panel house 71. The main body of the control room panel house 71 is a sandwich fireproof panel house. The control room panel house 71 is installed on the concrete platform 13 for hoisting the flow measurement component. The control room panel house 71 is 3 m long, 2.2 m wide, and 2.6 m high. The sandwich fireproof panel of the control room panel house 71 is 0.1 m thick. The sandwich fireproof panel has double-layer glass sliding windows and a fire door. The control room panel house 71 is used to place the power distribution control box 72, the system host computer 73, and personnel control office equipment;

[0093] As Figure 10 shown is the general drawing page of the operation software schematic diagram of the control component of the present utility model. The "general drawing" interface 731 of the host computer measurement software is displayed on the PLC touch screen 721 of the system host computer 73.

[0094] As Figure 11 shown in the figure is the parameter setting page of the control component operation software of the present utility model. The "parameter setting" interface 732 of the upper computer measurement software is displayed on the PLC touch screen 721 of the upper computer 73 of the system;

[0095] As Figure 12 shown in the figure is the data filtering page of the control component operation software of the present utility model. The "data filtering" interface 733 of the upper computer measurement software is displayed on the PLC touch screen 721 of the upper computer 73 of the system;

[0096] As Figure 13 shown in the figure is the general schematic diagram of the engineering application of the through-wall reflux pump after the flow measurement is completed. After the automatic measurement is completed, the "result export" control of the upper computer measurement software of the upper computer 73 of the system. At this time, the upper computer measurement software will automatically generate an encrypted data file, and import this encrypted data file into the control box display software program in the engineering application. The control box display software program in the engineering application can calculate and display the actual flow rate of the current reflux pump according to the actual reflux pump main engine frequency and the pressure value of the pressure sensor;

[0097] Preferably, the outer shell of the power distribution control box 72 is made of stainless steel. The power distribution control box 72 is 1.8 m high, 0.8 m wide and 0.6 m thick. The power distribution control box 72 is installed in the control room shed 71. The power distribution control box 72 is composed of a PLC touch screen 721, local control buttons 722, internal circuit components of the box, control software, a switch, etc. The power distribution control box 72 is used to supply power to the equipment in the measurement system and control the start and stop of the reflux pump main engine 42. On the other hand, the power distribution control box 72 also plays a role in controlling and adjusting the opening of the regulating weir gate hoist 61. The power distribution control box 72 collects data of the pressure sensor 43 on the reflux pump side, the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, the current meter 521, the pressure sensor 522 on the flow measurement side, the static pressure type liquid level gauge 641 on the reflux pump side, the static pressure type liquid level gauge 642 on the flow measurement side, and the sludge concentration meter 66;

[0098] Preferably, the upper computer 73 of the system is a high-performance upper computer, installed in the control room shed 71. The upper computer 73 of the system is connected to the power distribution control box 72. The upper computer 73 of the system uses windows server 2012R2, SOL Server2022Standard Edition and 15CAL Pack, and self-developed measurement-related software as the operating system. The upper computer 73 of the system is used to control the entire measurement system and output test results;

[0099] Preferably, the cable transfer box housing 74 is made of stainless steel and is installed on the concrete platform 14 for installing the regulating weir gate hoist. The cable transfer box housing 74 is 0.6 m high (including a 0.05 m waterproof cap), 0.4 m wide, and 0.3 m thick. The cable transfer box housing 74 contains a wiring row, which is mainly used for the transfer of power cables and signal cables of the reflux pump main unit 42, the side pressure sensor 43 of the reflux pump, the external clamp type ultrasonic flowmeter 511, the insertion type electromagnetic flowmeter 512, the current meter 521, the flow measurement side pressure sensor 522, the regulating weir gate hoist 61, etc.;

[0100] Preferably, the local control button 722 consists of an emergency stop switch, two changeover switches, two fault display lights, and five illuminated switch buttons. The local control button 722 is used to control the start and stop of the test reflux pump main unit 42 and the regulating weir gate hoist 61;

[0101] The present utility model also provides a flow measurement method for a wall-piercing reflux pump, comprising the following steps:

[0102] Pour and construct the concrete pool 11, the concrete platform 12 for hoisting the wall-piercing reflux pump assembly, the concrete platform 13 for hoisting the flow measurement assembly, the concrete platform 14 for installing the regulating weir gate hoist, the concrete support pier 16 for the flow measurement assembly, and the concrete pool partition wall 17;

[0103] Install the embedded installation assembly 3 through the concrete pool partition wall 17;

[0104] Install the wall-piercing reflux pump assembly 4 and the flow measurement assembly 5 at both ends of the embedded installation assembly 3 respectively, and install the head measurement assembly 6 at the top of the concrete pool partition wall 17;

[0105] Install the anti-winding and anti-rotation cyclone group 44 at the connection between the reflux pump main unit installation bracket 41 and the embedded installation assembly 3;

[0106] Inject clean water into the concrete pool 11 and make the clean water just submerge the concrete pool partition wall 17. At the same time, erect the hoisting assembly 2 at the top of the concrete pool 11 and start the test.

[0107] Preferably, when starting the test, the host of the through-wall reflux pump 42 and the regulating weir gate hoist 61 are started to test the instruments in the flow measurement system; the regulating weir gate hoist 61 is an intelligent opening control integrated electric actuator. The regulating weir gate hoist 61 has a cast iron base. The opening of the regulating weir gate hoist 61 is displayed on the surface through a display screen. In the switch control box of the regulating weir gate hoist 61, there are PM electronic position and conductive plastic potentiometers as position sensing elements and position indication signals of a proportional regulating type electric actuator. The potentiometer of the regulating weir gate hoist 61 sends the resistance value that changes with the stroke of the output shaft into the comparison and amplification circuit of the PM-2 control board. The comparison amplifier outputs a 4mA-20mA DC current indication signal. After being connected to the cable transfer box 74, the regulating weir gate hoist 61 is connected to the power distribution control box 72. The regulating weir gate hoist 61 is used to control the up and down movement of the regulating weir gate screw rod 62 so as to precisely control the movement path of the regulating weir gate weir plate 63;

[0108] Preferably, the regulating weir gate screw rod 62 is a φ32mm stainless steel screw rod with a length of 2.3m. The regulating weir gate screw rod 62 is used to cooperate with the regulating weir gate hoist 61 and connect the regulating weir gate weir plate 63; the regulating weir gate weir plate 63 is a stainless steel weir plate. The regulating weir gate weir plate 63 is under single-sided pressure. The regulating weir gate weir plate 63 is 2m long, 0.65m high and 0.04m thick. The regulating weir gate weir plate 63 is used to adjust the weir gate opening;

[0109] Preferably, the static pressure type liquid level gauge 641 on the reflux pump side and the static pressure type liquid level gauge 642 on the flow measurement side are respectively static pressure type liquid level gauges. The static pressure type liquid level gauge 641 on the reflux pump side and the static pressure type liquid level gauge 642 on the flow measurement side are respectively installed in the anti-wave casing 651 of the static pressure type liquid level gauge on the reflux pump side. The static pressure type liquid level gauge 641 on the reflux pump side and the static pressure type liquid level gauge 642 on the flow measurement side respectively have ultrasonic and aeration self-cleaning systems. The measurement ranges of the static pressure type liquid level gauge 641 on the reflux pump side and the static pressure type liquid level gauge 642 on the flow measurement side are both 0m-5m. The static pressure type liquid level gauge 641 on the reflux pump side and the static pressure type liquid level gauge 642 on the flow measurement side are respectively connected to the power distribution control box 72. The static pressure type liquid level gauge 641 on the reflux pump side and the static pressure type liquid level gauge 642 on the flow measurement side are respectively used to cooperate with the pressure sensor 43 on the reflux pump side to measure the water surface level on one side of the through-wall reflux pump assembly 4;

[0110] Preferably, the anti-wave casing 651 of the static pressure type liquid level gauge on the reflux pump side and the anti-wave casing 652 of the static pressure type liquid level gauge on the flow measurement side are both DN50 stainless steel pipes. The anti-wave casing 651 of the static pressure type liquid level gauge on the reflux pump side and the anti-wave casing 652 of the static pressure type liquid level gauge on the flow measurement side are both 4m long and 2mm thick. Multiple water inlet holes with a diameter of 3cm are respectively opened at the bottom of the anti-wave casing 651 of the static pressure type liquid level gauge on the reflux pump side and the anti-wave casing 652 of the static pressure type liquid level gauge on the flow measurement side. The anti-wave casing 651 of the static pressure type liquid level gauge on the reflux pump side and the anti-wave casing 652 of the static pressure type liquid level gauge on the flow measurement side are both installed outside the static pressure type liquid level gauge 641 on the reflux pump side. The anti-wave casing 651 of the static pressure type liquid level gauge on the reflux pump side and the anti-wave casing 652 of the static pressure type liquid level gauge on the flow measurement side are both used for the protection of the static pressure type liquid level gauge 641 on the reflux pump side and to prevent the influence on the measurement of the static pressure type liquid level gauge 641 on the reflux pump side after the reflux pump main unit 42 is started;

[0111] Preferably, the sludge concentration meter 66 is connected to the power distribution control box 72 and uses a variety of sensor measurement principles to measure the concentration of the water-using sludge in the concrete pool 11, which is convenient for adjusting the concentration of the test water-using sludge according to the test requirements;

[0112] The flow measurement method further includes:

[0113] Set the measurement parameters on the touch screen of the power distribution control box 72 and start automatic measurement. The PLC touch screen 721 is used to control and display various parameters of the measurement system test;

[0114] After the automatic measurement is completed, an encrypted data file is generated by the system host computer 73, and this encrypted data file is imported into the control box. The control box displays the actual flow rate of the current reflux pump according to the actual reflux pump main unit frequency and the pressure sensor pressure value.

[0115] When in use, it includes the following steps:

[0116] S1. Pour and construct the concrete pool, hoist the concrete platform for the wall-piercing reflux pump assembly, hoist the concrete platform for the flow measurement assembly, install the regulating weir gate hoist on the concrete platform, the concrete support pier for the flow measurement assembly and the concrete pool partition wall;

[0117] S2. Install the embedded installation components through the concrete pool partition wall;

[0118] S3. Install the wall-piercing reflux pump assembly and the flow measurement assembly at both ends of the embedded installation components respectively, and install the head measurement assembly on the top of the concrete pool partition wall;

[0119] S4. Install the anti-winding and anti-rotation cyclone group at the connection between the reflux pump main unit installation bracket and the embedded installation components;

[0120] S5. Inject clear water into the interior of the concrete water tank, and make the clear water just submerge the isolation wall of the concrete water tank. At the same time, erect a hoisting assembly on the top of the concrete water tank;

[0121] S6. Turn on the main power supply 72 of the distribution control box, and gradually turn on the power supplies of the hoisting assembly 2, the pressure sensor 43 on the reflux pump side, the external clamp ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, the current meter 521, the pressure sensor 522 on the flow measurement side, the regulating weir gate hoist 61, the static pressure liquid level gauge 641 on the reflux pump side, the static pressure liquid level gauge 642 on the flow measurement side, the sludge concentration 66, the PLC 72 of the distribution control box, the system upper computer 73, etc.; Start the PLC touch screen 721 and the system upper computer 73, and open the independently developed PLC touch screen 721 and the upper computer measurement software; Observe and test whether all electrical components of the flow measurement system except the reflux pump main unit 42 start and stop and the signal display is normal.

[0122] S7. Select a suitable anti-winding and anti-rotation cyclone according to the model (outlet diameter) of the reflux pump main unit 42 to be measured, and install the reflux pump main unit 42 to be measured in place with the anti-winding and anti-rotation cyclone through screws, and then install it on the reflux pump main unit installation bracket 41 to complete the wall-piercing reflux pump assembly 4 to be measured.

[0123] S8. Connect and fix the lifting ring 235 on the reflux pump side of the hoisting assembly 2 with the lifting hole on the reflux pump main unit installation bracket 41. Use the hoisting main unit 231 on the reflux pump side to lift the installed wall-piercing reflux pump assembly 4 to an appropriate height and move it to an appropriate position. Align the guiding limit groove on the reflux pump main unit installation bracket 41 with the top of the reflux pump assembly installation positioning guide rail 323, and control the hoisting main unit 231 on the reflux pump side to slowly lower the wall-piercing reflux pump assembly 4 to the lowest end.

[0124] S9. Connect the power cable 42 and signal cable of the reflux pump main unit to the designated terminal 74 of the cable transfer box.

[0125] S10. Turn on the sub-power supply 41 of the reflux pump main unit of the distribution control box 72; Start the local control button 722 on the distribution control box 72, and observe the forward and reverse rotation conditions and the start and stop of the reflux pump main unit 41, whether it is normal, the PLC touch screen software interface 7211, and whether the start and stop signals of the reflux pump main unit 41 are normal; Click the "Start" and "Stop" controls in the PLC touch screen software interface 7211 on the PLC touch screen 721, and observe whether the start and stop of the reflux pump main unit 41 are normal and whether the start and stop signals of the reflux pump main unit 41 in the PLC touch screen software interface 7211 are normal.

[0126] S11. Open all the regulating weir gate plates 63 in the lift measurement assembly 6 through the local control button 722 on the power distribution control box 72; start the main unit 41 of the reflux pump; put an appropriate amount of sludge into the concrete water tank 11, and put an appropriate amount of sludge again by referring to the data displayed by the sludge concentration meter 66, so that the sludge concentration of the muddy water in the concrete water tank 11 meets the sludge concentration of the main unit 41 of the reflux pump to be tested under the actual working conditions, with the error controlled within 20 mg / l.

[0127] S12. Rotate the changeover switch in the local control button 722 on the power distribution control box 72 to the remote gear; click the "PLC Program Control" control on the PLC touch screen software interface 7211 of the power distribution control box 72.

[0128] S13. Input parameters on the "Parameter Setting" interface 732 of the host computer measurement software of the system host computer 73. For example, set the "Pump Start Measurement Frequency" to 10 Hz; set the "Pump Stop Measurement Frequency" to 50 Hz; set the "Frequency Interval" to 0.5 Hz; set the "Steady Frequency Time" to 1 min; set the "Start Measurement Lift" to 20 cm; set the "Stop Measurement Lift" to 150 cm; set the "Lift Interval" to 5 cm; set the "Steady Lift Time" to 3 min; set the "Number of Cycles" to 10 times; set the "Weir Gate Adjustment" to 0.1%; set the "Weir Gate Stability" to 30 s.

[0129] S14. Input parameters on the "Data Filtering" interface 733 of the host computer measurement software of the system host computer 73. For example, set the "External Clamp-on Flowmeter - Lower Limit / Upper Limit / Maximum Fluctuation Value / Sampling Time" to 0000.0 m 3 / h, 9999.9 m 3 / h, 020.0 m 3 / h, 00100 ms; set the "Insertion Flowmeter - Lower Limit / Upper Limit / Maximum Fluctuation Value / Sampling Time" to 0000.0 m 3 / h, 9999.9 m 3 / h, 020.0 m 3 / h, 00100 ms; the "flow velocity meter - lower limit value / upper limit value / maximum fluctuation value / value-taking time" is set to 0.000 m / s, 9.999 m / s, 0.050 m / s, 00100 ms respectively; the "return pump liquid level gauge - lower limit value / upper limit value / maximum fluctuation value / value-taking time" is set to 180.00 cm, 300.00 cm, 020.00 cm, 00500 ms respectively; the "flow measurement liquid level gauge - lower limit value / upper limit value / maximum fluctuation value / value-taking time" is set to 220.00 cm, 370.00 cm, 020.00 cm, 00500 ms respectively; the "return pump pressure gauge - lower limit value / upper limit value / maximum fluctuation value / value-taking time" is set to 03000 Pa, 15000 Pa, 02000 Pa, 00500 ms respectively; the "flow measurement side pressure gauge - lower limit value / upper limit value / maximum fluctuation value / value-taking time" is set to 07000 Pa, 22000 Pa, 02000 Pa, 00500 ms respectively; the "sludge concentration meter - lower limit value / upper limit value / maximum fluctuation value / value-taking time" is set to 01000 mg / l, 10000 mg / l, 00100 mg / l, 01000 ms respectively.

[0130] S15. Click the "PLC Program Control Start" control on the "General Drawing" interface of the upper computer measurement software 731 of the system upper computer 73. At this time, the measurement software will control the entire measurement system through the PLC according to the set parameters and record various instrument data. The process is as follows:

[0131] Step 1, start the regulating weir gate hoist 61 to adjust the weir plate 63 of the regulating weir to an opening of 100%;

[0132] Step 2, start the return pump main engine 42 at the start measurement pump frequency set value of 10 Hz;

[0133] Step 3, after reaching the stable frequency time set value of 1 min, automatically record the three-phase voltage and current of the return pump main engine 42, the pressure value of the pressure sensor 43 on the return pump side, the flow value of the external clamp ultrasonic flowmeter 511, the flow value of the insertion electromagnetic flowmeter 512, the flow velocity value of the flow velocity meter 521, the pressure value of the pressure sensor 522 on the flow measurement side, the liquid level value of the static pressure liquid level gauge 641 on the return pump side, the liquid level value of the static pressure liquid level gauge 642 on the flow measurement side, and the sludge concentration value of the sludge concentration meter 66; the measurement system calculates the current head value according to the preset height value of the pressure of the pressure sensor 43 on the return pump side from the bottom of the pool, the head loss value of the pipeline of the measurement system, and the height value of the pressure sensor 522 on the flow measurement side from the bottom of the pool, combined with the measured pressure value of the pressure sensor 43 on the return pump side, the pressure value of the pressure sensor 522 on the flow measurement side, the liquid level value of the static pressure liquid level gauge 641 on the return pump side, the liquid level value of the static pressure liquid level gauge 642 on the flow measurement side, and the sludge concentration value of the sludge concentration meter 66 through the built-in calculation logic and automatically records it;

[0134] Step 4: The measurement system automatically determines the conditions of the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, and the current meter 521 of the current reflux pump main unit 42 at a frequency of 10 Hz. If there is no measured value or partial lack of measured value for the flow value of the external clamp-on ultrasonic flowmeter 511, the flow value of the insertion electromagnetic flowmeter 512, and the flow velocity value of the current meter 521, it indicates that the set value of the measured pump frequency of 10 Hz is too low. The measurement system will gradually increase the operating frequency of the 42 reflux pump main unit by 0.5 Hz each time according to the frequency interval set value until there are measured values for the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, and the current meter 521. Record the operating frequency of the reflux pump main unit 42 at this time and use it as the actual starting measurement pump frequency. If there are measured values for the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, and the current meter 521, then compare the current head value calculated through the built-in calculation logic with the starting head set value. If the current head value calculated through the built-in calculation logic is greater than or equal to the starting head set value, use the current head value calculated through the built-in calculation logic as the starting head value and record it. If the current head value calculated through the built-in calculation logic is less than the starting head set value, gradually adjust the weir gate opening according to the weir gate adjustment set value and the weir gate stability set value so that the current head value calculated through the built-in calculation logic is equal to the starting head set value.

[0135] Step 5: When the measurement system automatically adjusts to the situation where there are measured values for the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, and the current meter 521, and the current head value calculated through the built-in calculation logic is greater than or equal to the starting head set value, the measurement system starts to automatically measure according to the head interval set value, the stable head time set value, the weir gate adjustment set value, the weir gate stability set value, the frequency interval set value, the stable frequency time set value, etc.

[0136] Step 6: Record the operating frequency of the reflux pump main unit 42, the three-phase current value, the measured values of the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, and the current meter 521, and the current head value calculated through the built-in calculation logic.

[0137] Step 7: Adjust the weir gate opening according to the head interval set value so that the current head value calculated through the built-in calculation logic = the current head value calculated through the built-in calculation logic before adjusting the weir gate opening + the head interval set value. After reaching the stable head time set value, record the operating frequency of the reflux pump main unit 42, the three-phase current value, the measured values of the external clamp-on ultrasonic flowmeter 511, the insertion electromagnetic flowmeter 512, and the current meter 521, and the current head value calculated through the built-in calculation logic.

[0138] Step 8: Repeat the previous step (Step 7) until, after calculating that the current head value is equal to the set head value for stopping measurement through the built-in calculation logic and recording relevant data, adjust the opening of the weir gate to 100%;

[0139] Step 9: Adjust the operating frequency of the main unit 42 of the reflux pump to increase the frequency, and the amplitude of frequency increase is the set value of the frequency interval;

[0140] Step 10: Repeat Steps 5 - 9 until the operating frequency of the main unit 42 of the reflux pump is equal to the set frequency value for stopping measurement. After recording relevant data, adjust the opening of the weir gate to 100%. At this time, an automatic program measurement process is completed;

[0141] Step 11: After waiting for the set value of the loop interval time, repeat Steps 5 - 10 until the number of loops reaches the set value of the number of loops, and then stop the main unit 42 of the reflux pump;

[0142] Step 12: Based on the data recorded after completing Steps 5 - 11 and combined with the built-in calculation logic, calculate the relationship curve between the frequency and head of the main unit 42 of the reflux pump and the flow rate under the current sludge concentration.

[0143] S16. Click the "Result Export" control of the host computer measurement software on the system host computer 73. At this time, the host computer measurement software will automatically generate an encrypted data file. Import this encrypted data file into the control box display software program in engineering applications, and the control box display software program in engineering applications can calculate and display the actual flow rate of the current reflux pump based on the actual operating frequency of the reflux pump main unit and the pressure value of the pressure sensor.

[0144] S17. Turn off all sub - power supplies except the lifting component 2 through the power distribution control box 72. Lift the wall - piercing reflux pump assembly 4 and the flow measurement assembly 5 through the lifting component 2. Remove the measured main unit 42 of the reflux pump from the installation bracket 41 of the reflux pump main unit. Clean the wall - piercing reflux pump assembly 4 and the flow measurement assembly 5. Drain the muddy water in the concrete water tank 11, clean the concrete water tank assembly 1, turn off the sub - power supply of the lifting component 2, and turn off the main power supply of the power distribution control box 72. The test process ends.

[0145] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device.

[0146] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A flow measurement system for a through-wall reflux pump, characterized in that: The flow measurement system includes a concrete pool component, a hoisting component, a pre-buried installation component, a through-wall return pump component, a flow measurement component, a head measurement component, and a power distribution and control component, wherein: The concrete water tank assembly stores the test water through a concrete water tank embedded in the ground. The top two ends of the concrete water tank are symmetrically cast with a through-wall reflux pump assembly hoisting concrete platform and a flow measurement assembly hoisting concrete platform; The pre-buried installation component is pre-buried in the concrete pool component, and the through-wall reflux pump component and the flow measurement component are respectively connected to two ends of the pre-buried installation component; The through-the-wall reflux pump assembly includes the reflux pump host mounting bracket, the reflux pump host, the reflux pump side pressure sensor and the anti-winding anti-cyclone group. The through-the-wall reflux pump assembly is installed to test the through-the-wall reflux pump host; The flow measurement component is fixed on the surface of the embedded stainless steel pipe. The flow measurement component is used to measure the flow, flow velocity and pressure of the through-wall reflux pump; The lift measurement component includes an adjusting weir gate weir plate fixed to the top of the concrete water tank partition wall, one end of the adjusting weir gate weir plate is connected to an adjusting weir gate screw rod, and the upper end of the adjusting weir gate screw rod is fixed to an adjusting weir gate opening and closing machine; a static pressure level gauge on the reflux pump side and a static pressure level gauge on the flow measurement side are fixed to the inner bottom of the concrete water tank; a sludge concentration meter is fixed to the inner wall of the concrete water tank. The lift measurement component measures the internal pressure and liquid level of the flow measurement system and adjusts the liquid level difference on both sides of the measurement system.

2. A flow measurement system for a through-wall reflux pump according to claim 1, characterized in that: A through-the-wall reflux pump assembly hoisting concrete platform and a flow measurement assembly hoisting concrete platform are symmetrically cast at both ends of the top of the concrete pool; The inner wall of the concrete water pool is cast with a concrete platform for installing the regulating weir gate hoist, the top of which is provided with a reserved hole for the screw rod of the regulating weir gate hoist, and the inner bottom of the concrete water pool is formed with a concrete support pier for the flow measurement component and a concrete water pool partition wall; The inner wall of the concrete pool partition wall is formed with a concrete limit for adjusting the weir gate, and the top of the concrete pool partition wall is provided with a reserved hole for installing the weir gate and the weir plate.

3. A flow measurement system for a through-wall reflux pump according to claim 2, characterized in that: The hoisting assembly includes a crane beam, and the two ends of the bottom of the crane beam are respectively fixed with a crane support column on the return pump side and a crane support column on the flow measurement side. A crane center main support column is fixed between the concrete platform for installing the weir gate hoist and the crane beam; The bottoms of the reflux pump side traveling support column and the flow measurement side traveling support column are respectively fixed to the top of the concrete water tank; The two ends of the bottom of the crane crossbeam are respectively fixed with a crane main unit on the reflux pump side and a crane main unit on the flow measurement side. A lifting wire on the reflux pump side is fixed on the crane main unit on the reflux pump side, and a lifting ring on the reflux pump side is fixed at the bottom of the lifting wire on the reflux pump side. A flow measurement side lifting wire is fixed at the bottom of the flow measurement side traveling crane main machine, and a flow measurement side lifting ring is fixed at the bottom of the flow measurement side lifting wire.

4. A flow measurement system for a through-wall reflux pump according to claim 3, characterized in that: The embedded installation assembly includes embedded stainless steel pipes that penetrate and are fixed in the concrete pool partition wall; The two ends of the embedded stainless steel pipe are respectively welded with a reflux pump side flange and a flow measurement side flange, the lower end of the reflux pump side flange is connected with a reflux pump component coupling limiter, and the bottom of the flow measurement side flange is fixed with a flow measurement component coupling limiter; The top two ends of the embedded stainless steel pipe are respectively fixed with a reflux pump component mounting positioning rail and a flow measurement component mounting positioning rail.

5. A flow measurement system for a through-wall reflux pump according to claim 4, characterized in that: The anti-winding anti-cyclone device group includes a DN500-600 anti-winding anti-cyclone device, a DN400-600 anti-winding anti-cyclone device and a DN300-600 anti-winding anti-cyclone device.

6. A flow measurement system for a through-wall reflux pump according to claim 5, characterized in that: The flow measurement assembly includes a flow meter installation straight pipe fixed on the surface of the embedded stainless steel pipe, an external clamp-on ultrasonic flow meter, a velocity meter installation straight pipe, a velocity meter, and a flow measurement side pressure sensor; The top of the clamp-on ultrasonic flowmeter is connected with an insertion-type electromagnetic flowmeter; One end of the embedded stainless steel pipe is connected with a check valve.

7. A flow measurement system for a through-wall reflux pump according to claim 6, characterized in that: The surface of the static pressure level gauge on the reflux pump side is penetrated by a wave-proof sleeve of the static pressure level gauge on the reflux pump side, and the surface of the static pressure level gauge on the flow measurement side is connected by a wave-proof sleeve of the static pressure level gauge on the flow measurement side.

8. A flow measurement system for a through-wall reflux pump according to claim 7, characterized in that: The power distribution and control components are fixed on the top of the concrete platform where the flow measurement components are hoisted.

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