Detection device for detecting flow of pump pipeline

Abstract

The utility model relates to a detection device for detecting pump pipeline flow, which comprises a case, a constant-temperature liquid storage device is arranged in the case, a control cabinet and a detection assembly are mounted on the case, the detection assembly comprises a liquid inlet pipe, a liquid return pipe and a power pump, the liquid inlet pipe and the liquid return pipe are mounted on the case, and liquid can enter the liquid inlet pipe through the power pump. One end of the liquid return pipe and one end of the liquid inlet pipe are located outside the machine box, the other end of the liquid return pipe and the other end of the liquid inlet pipe are communicated with the constant-temperature liquid storage device, and the liquid inlet pipe is communicated with a flow meter. A pipe extrusion mechanism capable of extruding and loosening the liquid inlet pipe is installed in the machine box, the liquid inlet pipe is further communicated with a pressure detection sensor, the pressure detection sensor and the flow meter are located on the side, away from the constant-temperature liquid storage device, of the pipe extrusion mechanism, and the control cabinet is electrically connected with the pipe extrusion mechanism, the power pump, the flow meter and the pressure detection sensor. According to the utility model, standardized detection can be respectively carried out on the flow of the pump pipeline in a normal pressure state and a pressurized state, so that whether the pump pipeline is a qualified product or not can be conveniently detected.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, and in particular relates to a testing device for detecting the flow rate of pump pipelines. Background Technology

[0002] The extracorporeal circulation tubing of a blood purification device is used in conjunction with the hemodialyzer, hemodiafiltration unit, and hemoperfusion unit during treatments such as hemodialysis and hemodiafiltration. It consists of arterial tubing, venous tubing, replacement fluid tubing, and other necessary accessories. When in use, it is used for hemodialysis patients in accordance with the "Standard Operating Procedures for Blood Purification".

[0003] Flow rate detection in the pump tubing of extracorporeal circulation systems is one of the important performance indicators of blood purification extracorporeal circulation systems. It can reflect the smoothness of extracorporeal circulation, blood flow rate, and fatigue characteristics of the pump tubing at its maximum service life. It is also an important indicator for the quality inspection of extracorporeal circulation systems. However, according to the national standard YY0267-2016 for extracorporeal circulation systems of hemodialysis and related treatment blood purification devices, there is currently no dedicated testing equipment to detect the flow rate of the pump tubing. In other words, it is currently inconvenient to test whether the pump tubing is qualified, which will affect production efficiency and quality. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a detection device for detecting the flow rate of pump pipelines, so as to solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows:

[0006] A detection device for detecting the flow rate of a pump pipeline includes a chassis with a cavity structure. A constant temperature liquid storage device is installed inside the chassis. A control cabinet and a detection assembly are installed on the chassis. The detection assembly includes an inlet pipe, a return pipe, and a power pump that allows liquid to enter the inlet pipe, all mounted on the chassis. One end of the return pipe and the inlet pipe are located outside the chassis, and the other end of the return pipe and the inlet pipe are connected to the constant temperature liquid storage device. A flow meter is connected to the inlet pipe.

[0007] The casing is equipped with a tube-squeezing mechanism that can squeeze and release the inlet pipe. A pressure detection sensor is also connected to the inlet pipe. The pressure detection sensor and the flow meter are located on the side of the tube-squeezing mechanism away from the constant temperature liquid storage device. The control cabinet is electrically connected to the tube-squeezing mechanism, the power pump, the flow meter, and the pressure detection sensor.

[0008] Furthermore, the power pump is a peristaltic pump, and the pump body of the peristaltic pump is located outside the casing and is equipped with a removable pump cover.

[0009] Furthermore, a partition is installed inside the chassis, and the tube extrusion mechanism includes a mounting base mounted on the partition. A linear drive mechanism electrically connected to the control cabinet is installed on one side of the mounting base, and a first tube clamping groove is opened on the other side of the mounting base, which penetrates the mounting base. A sliding groove connected to the first tube clamping groove is opened on the mounting base to form an inverted T-shaped groove. A slider that can move in the sliding groove is installed on the linear drive mechanism, and the tube body of the liquid inlet pipe penetrates the mounting base through the first tube clamping groove.

[0010] Furthermore, the linear drive mechanism is a lead screw transmission mechanism, and a position sensing plate is installed on the side of the slider away from the first tube groove. The side of the position sensing plate away from the slider is located outside the slide groove. A position sensor is installed on the mounting base that is opposite to the position of the position sensing plate. The position sensor is electrically connected to the control cabinet.

[0011] Furthermore, the control cabinet is electrically connected to a display screen embedded in the chassis.

[0012] Furthermore, a fixing rod is installed on the outside of the chassis below the inlet pipe and the return pipe, and a second pipe clamping groove is opened on the end of the fixing rod away from the chassis.

[0013] Furthermore, the number of the detection assemblies is multiple.

[0014] Furthermore, the constant temperature liquid storage device is a constant temperature water bath.

[0015] Furthermore, a temperature and humidity sensor is installed outside the chassis, and the temperature and humidity sensor is electrically connected to the control cabinet.

[0016] Furthermore, the chassis has an opening on one side, and an openable door is installed on the opening side of the chassis. All four corners of the chassis's outer bottom surface are equipped with casters with self-locking function.

[0017] The beneficial effects of this utility model by adopting the above technical solution are as follows:

[0018] This utility model is an automated testing device developed based on the detection method and standard for pump pipeline flow rate specified in the national standard. When in use, it can perform standardized testing of the flow rate of pump pipeline under normal pressure and pressurized conditions, so as to detect whether the pump pipeline is qualified, thereby improving production efficiency and quality. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0020] Figure 2 This is the second structural schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of the middle part of the device;

[0023] Figure 5 for Figure 1 A magnified structural diagram of part A in the middle;

[0024] Figure 6 This is the third structural schematic diagram of the present invention;

[0025] Figure 7 This is a structural diagram of the present invention in its use state;

[0026] Figure 8 for Figure 7 A magnified structural diagram of section B in the middle;

[0027] Reference numerals: 1. Power pump; 2. Inlet pipe; 3. Return pipe; 4. Pipe extrusion mechanism; 41. Mounting base; 42. Linear drive mechanism; 421. Bracket; 422. Drive motor; 43. First pipe clamping groove; 44. Slide groove; 45. Slider; 46. Position sensing plate; 47. Position sensor; 5. Flow meter; 6. Pressure sensor; 7. Chassis; 71. Door; 72. Heat dissipation hole; 8. Constant temperature liquid storage device; 9. Control cabinet; 10. Pump pipe; 11. Support plate; 12. Partition plate; 13. Display screen; 14. Fixing rod; 15. Second pipe clamping groove; 16. Temperature and humidity sensor; 17. Caster wheel; 18. Cooling fan; 19. Branch pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 8As shown, this utility model provides a detection device for detecting the flow rate of a pump pipeline, including a housing 7 with a cavity structure. A constant-temperature liquid storage device 8 is installed inside the housing 7, located at the bottom of the housing 7. During use, the constant-temperature liquid storage device 8 contains test water at 37°C as the test liquid, and the device ensures that the test water remains at 37°C at all times. A control cabinet 9 and a detection assembly are installed on the housing 7. The control cabinet 9 is a PLC controller with data storage functions. The detection assembly includes an inlet pipe 2, a return pipe 3, and a power pump 1 installed on the housing 7 to allow liquid to enter the inlet pipe 2. One end of the return pipe 3 and the inlet pipe 2 are respectively located at... Outside the casing 7, the other ends of the return pipe 3 and the inlet pipe 2 are respectively connected to the constant temperature liquid storage device 8. Specifically, the ends of the return pipe 3 and the inlet pipe 2 located outside the casing 7 are respectively connected to connectors, so that it is easy to connect both ends of the pump pipe 10 to the return pipe 3 and the inlet pipe 2 during use. When the two ends of the pump pipe 10 are respectively connected to the inlet pipe 2 and the return pipe 3, after starting the power pump 1, the test water in the constant temperature liquid storage device 8 can circulate through the inlet pipe 2, the pump pipe 10 and the return pipe 3. In addition, a pipe fixing bracket can be set inside the casing 7 to fix the positions of the return pipe 3 and the inlet pipe 2 respectively, so as to organize the pipes of the return pipe 3 and the inlet pipe 2 and prevent the pipes from being kinked.

[0030] A flow meter 5 is connected to the inlet pipe 2. Both the flow meter 5 and the control cabinet 9 are mounted inside the chassis 7 via a support plate 11. Specifically, the flow meter 5 can be a high-precision ultrasonic flow meter to ensure accurate flow measurement. Both the sequential flow and the cumulative flow per unit time in the pipeline can be measured by the flow meter 5. At this time, the inlet pipe 2 is under normal pressure. Before use, a detection program can be set in the control cabinet 9, including relevant parameters for each component. During use, first set the operating flow rate of the power pump 1 to L0 in the control cabinet 9. Then, insert both ends of the pump pipe 10 to be tested into the inlet pipe 2 and the return pipe 3 located outside the chassis 7, respectively. Connect both ends of the pump pipe 10 to the inlet pipe 2 and the return pipe 3, respectively. Then, when the power pump 1 is started... When pump 1 is running, the test water in the constant temperature storage device 8 can circulate through the inlet pipe 2, pump pipe 10 and return pipe 3. After running for a period of time, the control cabinet 9 automatically reads the flow rate value on the flow meter 5 multiple times per unit time, for example three times, and takes the average value to calculate the actual flow rate of pump pipe 10 under normal pressure as L1. According to the pre-set detection program: δ1=|(L0-L1) / L0|×100%, the control cabinet 9 can calculate the relative deviation δ1 of the flow rate of pump pipe 10 under normal pressure and compare it with the standard value set in the national standard: when δ1 does not exceed 10%, pump pipe 10 is qualified. The control cabinet 9 judges whether the pipeline flow rate of pump pipe 10 under normal pressure is qualified. If pump pipe 10 is unqualified, the test ends.

[0031] When the flow rate of pump pipe 10 is qualified under normal pressure, the next stage of the testing process continues. Specifically, the casing 7 is equipped with a pipe-squeezing mechanism 4 that can squeeze and release the inlet pipe 2. In the initial state, the pipe-squeezing mechanism 4 does not squeeze the inlet pipe 2, and at this time, the inlet pipe 2 is under normal pressure. When the pipe-squeezing mechanism 4 moves to the position to squeeze the inlet pipe 2, it can change the pressure in the inlet pipe 2, switching from normal pressure to pressurized pressure. The inlet pipe 2 is also connected to a pressure detection sensor 6 through a branch pipe 19. When the test water is in the inlet pipe... When the liquid flows inside the inlet pipe 2, the pressure sensor 6 can measure the pressure inside the pipe 2. The pressure sensor 6 and the flow meter 5 are both located on the side of the extrusion mechanism 4 away from the constant temperature liquid storage device 8. In use, the inlet pipe 2 passes through the extrusion mechanism 4 and the flow meter 5 in sequence and then connects to the pressure sensor 6 through the branch pipe 19. The end of the inlet pipe 2 away from the constant temperature liquid storage device 8 is located outside the housing 7 after passing through the housing 7. The control cabinet 9 is electrically connected to the extrusion mechanism 4, the power pump 1, the flow meter 5, and the pressure sensor 6 to realize automated detection.

[0032] Specifically, when the flow rate of pump pipe 10 is qualified under normal pressure, control cabinet 9 automatically starts the pipe squeezing mechanism 4 to squeeze the inlet pipe 2. When the pipe squeezing mechanism 4 reaches the position, it stops operating and maintains the squeezing state, so that the inlet pipe 2 switches from normal pressure state to pressurized state. After running for a period of time, for example, the running time can be set to 10 minutes, when the pressure in the pipeline does not reach the pressure value set in control cabinet 9: 33.3 kPa or continues to fluctuate, control cabinet 9 judges pump pipe 10 as defective based on the pressure value signal transmitted by pressure detection sensor 6 and ends the detection process.

[0033] When the pressure in the pipeline is constant, the control cabinet 9 automatically reads the flow rate value on the flow meter 5 multiple times per unit time, for example, three times, and takes the average value to calculate the actual flow rate of the pump pipe 10 under pressurization as L2. The control cabinet 9 calculates the relative deviation δ2 of the flow rate of the pump pipe 10 under pressurization according to the pre-set detection program: δ2=|(L1-L2) / L1|×100%. It compares this value with the standard value set in the national standard: when δ2 does not exceed 10%, the pump pipe 10 is a qualified product. This determines whether the pipeline flow rate of the pump pipe 10 under pressurization is qualified. At this time, regardless of whether the pump pipe 10 is qualified, the extrusion mechanism 4 returns to the initial state, the power pump 1 stops running, and then the pump cover is removed. After removing the pump pipe 10, the entire detection process is completed.

[0034] In summary, this utility model is an automated testing device developed based on the pump pipe flow detection method and standard specified in national standard YY0267-2016. During use, it can perform standardized testing of the flow rate of pump pipe 10 under both normal and pressurized conditions, facilitating the detection of whether pump pipe 10 is a qualified product, thereby improving production efficiency and quality. In other words, this utility model is a testing device specifically designed for pump pipe flow detection, and it can perform automated testing, providing valuable application reference for pump pipe flow detection.

[0035] Furthermore, such as Figure 7 and Figure 8 As shown, the power pump 1 is a peristaltic pump. The pump body of the peristaltic pump is located outside the casing 7 and is equipped with a removable pump cover. Specifically, the pump body of the peristaltic pump, the end of the inlet pipe 2 away from the constant temperature liquid storage device 8, and the end of the return pipe 3 away from the constant temperature liquid storage device 8 can be set on the same side outside the casing 7. The peristaltic pump is a peristaltic pump in the prior art. When in use, after removing the pump cover, the pump tube 10 to be tested can be installed on the pump body of the peristaltic pump. That is, the existing peristaltic pump itself can serve as a carrier for the pump tube 10. At the same time, after starting the peristaltic pump, the peristaltic pump circulates and squeezes the pump tube 10, which can realize the test water circulating through the inlet pipe 2, the pump tube 10 and the return pipe 3, which is more convenient for testing.

[0036] The specific configuration of the extrusion mechanism 4 is as follows: Figure 3 , Figure 4 and Figure 6 As shown, a partition 12 is installed inside the chassis 7, and the constant temperature liquid storage device 8 is located inside the chassis 7 below the partition 12; the tube extrusion mechanism 4 includes a mounting base 41 mounted on the partition 12. A linear drive mechanism 42 electrically connected to the control cabinet 9 is mounted on one side of the mounting base 41, and a first tube clamping groove 43 penetrating the mounting base 41 is opened on the other side of the mounting base 41. A sliding groove 44 connected to the first tube clamping groove 43 is opened on the mounting base 41 to form an inverted T-shaped groove. A slider 45 that can move in the sliding groove 44 is installed on the linear drive mechanism 42. The tube body of the liquid inlet pipe 2 passes through the mounting base 41 through the first tube clamping groove 43. Specifically, the first tube clamping groove 43... The groove 43 is a U-shaped groove, and the U-shaped opening of the first tube clamping groove 43 is flush with the edge of the mounting base 41. This makes it easy to clamp the inlet tube 2 onto the mounting base 41 through the first tube clamping groove 43, so that the inlet tube 2 can pass through the mounting base 41. In use, the linear drive mechanism 42 can drive the slider 45 to move in the sliding groove 44. When the slider 45 moves to abut against the inlet tube 2 in the first tube clamping groove 43 and moves into place, the pressure at the inlet of the inlet tube 2 can be changed and gradually increased to a certain range, such as when the pressure increases to 33.3 kPa, or 250 mmHg, the inlet tube 2 is switched from the normal pressure state to the pressurized state.

[0037] The linear drive mechanism 42 is specifically configured as follows: The linear drive mechanism 42 is a screw transmission mechanism. Specifically, the linear drive mechanism 42 includes a bracket 421 mounted on the mounting base 41. A screw parallel to the slide groove 44 is rotatably connected inside the bracket 421. A drive motor 422 mounted on the bracket 421 is driven and connected to the screw. The drive motor 422 is electrically connected to the control cabinet 9. A slider 45 is fitted onto the end of the screw near the first tube clamping groove 43. The side of the slider 45 near the first tube clamping groove 43 is located inside the slide groove 44 and is slidably connected to the mounting base 41. For example, guide grooves parallel to the slide groove 44 can be opened on the two opposite groove walls of the slide groove 44, and guide blocks located inside the guide grooves and slidably connected to the guide grooves are fixedly connected to both sides of the slider 45 to achieve a sliding connection between the slider 45 and the mounting base 41. In use, the drive motor 422 can drive the screw to rotate. During the rotation of the screw, the slider 45 can move along the slide groove 44 to squeeze the liquid inlet tube 2 in the first tube clamping groove 43.

[0038] In addition, to facilitate the detection of whether the slider 45 has moved into position when squeezing the inlet pipe 2, a positioning sensor 46 is installed on the side of the slider 45 away from the first pipe clamping groove 43. The side of the positioning sensor 46 away from the slider 45 is located outside the slide groove 44, that is, the slide groove 44 is a U-shaped groove, and the U-shaped opening of the slide groove 44 is flush with the edge of the mounting base 41. A positioning sensor 47 is installed on the mounting base 41, which is opposite to the position of the positioning sensor 46. The positioning sensor 47 is electrically connected to the control cabinet 9. Specifically, in use, when the positioning sensor 47 senses the positioning sensor 46, the slider 45 moves into position, and then the drive motor 422 can be automatically controlled by the control cabinet 9 to stop running, so that the extrusion mechanism 4 maintains the squeezing state of the inlet pipe 2.

[0039] Furthermore, such as Figure 1 and Figure 7 As shown, the control cabinet 9 is electrically connected to a display screen 13 embedded in the chassis 7. Specifically, the display screen 13 can be set as a touch screen. During use, the relevant parameters of each component can be set through the display screen 13, and the operating parameters of each component can be displayed in real time on the display screen 13, as well as the prompt information on whether the pump pipe 10 is a qualified product.

[0040] Furthermore, such as Figure 1 , Figure 5 and Figure 7As shown, a fixing rod 14 is installed on the outside of the casing 7 located below the inlet pipe 2 and the return pipe 3. A second pipe clamping groove 15 is opened on the end of the fixing rod 14 away from the casing 7. Specifically, the second pipe clamping groove 15 is a U-shaped groove, and the U-shaped opening of the second pipe clamping groove 15 is flush with the end of the fixing rod 14 away from the casing 7. This makes it easy to clamp the body of the pump pipe 10 onto the fixing rod 14 through the second pipe clamping groove 15. In use, the two ends of the pump pipe 10 can be clamped onto the fixing rod 14 respectively, and then connected to the inlet pipe 2 and the return pipe 3. This can straighten the pipeline of the pump pipe 10 and prevent the pump pipe 10 from being kinked.

[0041] Furthermore, such as Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, the number of detection assemblies is multiple, for example, two sets can be set, and the two sets of detection assemblies can be symmetrically distributed on both sides of the chassis 7. In this way, during use, the flow rate of multiple pump pipes 10 can be detected simultaneously to improve detection efficiency.

[0042] Furthermore, the constant temperature liquid storage device 8 is a constant temperature water bath, which can easily ensure that the test water is always at 37°C to ensure the accuracy of the test results.

[0043] Furthermore, such as Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a temperature and humidity sensor 16 is installed outside the chassis 7. The temperature and humidity sensor 16 is electrically connected to the control cabinet 9. Specifically, the temperature and humidity sensor 16 is used to detect the temperature and humidity in the surrounding environment to ensure that the temperature and humidity of the pump tube 10 during the blood purification surgery are consistent with those during the flow detection process, thereby improving the accuracy of the detection. The temperature and humidity in the surrounding environment can be adjusted by existing equipment such as air conditioners and humidifiers.

[0044] Furthermore, such as Figure 2 and Figure 3 As shown, the chassis 7 has an opening on one side, and the opening side of the chassis 7 is equipped with an openable door 71. Specifically, when the door 71 is opened, it is convenient to maintain and repair the various components inside the chassis 7. In addition, it is also convenient to periodically replace the test water in the constant temperature liquid storage device 8. Furthermore, several heat dissipation holes 72 and cooling fans 18 are provided on the chassis 7 to ensure air circulation and heat dissipation inside the chassis 7.

[0045] Furthermore, such as Figures 1 to 3 , Figure 6 and Figure 7As shown, the four corners of the bottom surface of the chassis 7 are equipped with casters 17 with self-locking function. By setting the casters 17, the detection device can be moved as a whole. After it is moved into place, the position of the chassis 7 can be fixed by the self-locking function of the casters 17, which makes it easy to use.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A detection device for detecting the flow rate of a pump pipeline, comprising a housing with a cavity structure, characterized in that: The chassis is equipped with a constant temperature liquid storage device, and a control cabinet and a detection assembly are installed on the chassis. The detection assembly includes an inlet pipe, a return pipe and a power pump that can allow liquid to enter the inlet pipe. One end of the return pipe and the inlet pipe are located outside the chassis, and the other end of the return pipe and the inlet pipe are connected to the constant temperature liquid storage device. A flow meter is connected to the inlet pipe. The casing is equipped with a tube-squeezing mechanism that can squeeze and release the inlet pipe. A pressure detection sensor is also connected to the inlet pipe. The pressure detection sensor and the flow meter are located on the side of the tube-squeezing mechanism away from the constant temperature liquid storage device. The control cabinet is electrically connected to the tube-squeezing mechanism, the power pump, the flow meter, and the pressure detection sensor.

2. The detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: The power pump is a peristaltic pump, and the pump body of the peristaltic pump is located outside the chassis and is equipped with a removable pump cover.

3. The detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: The chassis is equipped with a partition. The tube extrusion mechanism includes a mounting base mounted on the partition. A linear drive mechanism electrically connected to the control cabinet is mounted on one side of the mounting base. A first tube clamping groove is opened through the mounting base on the other side. A sliding groove connected to the first tube clamping groove is opened on the mounting base to form an inverted T-shaped groove. A slider that can move in the sliding groove is mounted on the linear drive mechanism. The tube body of the liquid inlet pipe passes through the mounting base through the first tube clamping groove.

4. The detection device for detecting the flow rate of a pump pipeline according to claim 3, characterized in that: The linear drive mechanism is a lead screw transmission mechanism. A position sensing plate is installed on the side of the slider away from the first tube slot. The side of the position sensing plate away from the slider is located outside the slide groove. A position sensor is installed on the mounting base, which is opposite to the position of the position sensing plate. The position sensor is electrically connected to the control cabinet.

5. A detection device for detecting the flow rate of a pump pipeline according to any one of claims 1-4, characterized in that: The control cabinet is electrically connected to a display screen embedded in the chassis.

6. The detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: A fixing rod is installed on the outside of the casing below the liquid inlet pipe and the liquid return pipe. A second pipe clamping groove is opened on the end of the fixing rod away from the casing.

7. The detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: The number of detection assemblies is multiple.

8. The detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: The constant temperature liquid storage device is a constant temperature water bath.

9. A detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: A temperature and humidity sensor is installed outside the chassis, and the temperature and humidity sensor is electrically connected to the control cabinet.

10. A detection device for detecting the flow rate of a pump pipeline according to claim 1, characterized in that: The chassis has an opening on one side, and an openable door is installed on the opening side of the chassis. All four corners of the chassis's outer bottom surface are equipped with casters with self-locking function.

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