CN213120752U

CN213120752U - Flowmeter calibration detection device

Info

Publication number: CN213120752U
Application number: CN202021516667.4U
Authority: CN
Inventors: 季腾飞
Original assignee: Kaifeng Jinke Flow Meter Co ltd
Current assignee: Kaifeng Jinke Flow Meter Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-05-04
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to a detection device is markd to flowmeter, including the liquid reserve tank, the liquid pump, the surge tank, the rose box, preceding straight tube section, back straight tube section and return line, liquid reserve tank export and liquid pump import intercommunication, liquid pump export and surge tank import intercommunication, surge tank export and rose box import intercommunication, back straight tube section export and return line import intercommunication, be equipped with standard flowmeter on the return line, a serial communication port, still include the water storage tank, gas holder and wastewater tank, the intercommunication has the washing pipeline in the surge tank import, the water storage tank delivery port, the gas holder gas outlet all with wash the pipeline intercommunication, it remains to mark flowmeter clamping mechanism to be equipped with between preceding straight tube section export and the back straight tube section import, return line exit linkage has the three-way valve, two exports of three-way valve communicate with liquid reserve tank import and wastewater tank import respectively. The utility model discloses can be quick, accurate clamping treat demarcating the flowmeter, can clean up the detection and use liquid to can wash the drying, in order to guarantee to mark efficiency and quality.

Description

Flowmeter calibration detection device

Technical Field

The utility model belongs to the technical field of check out test set, concretely relates to flowmeter calibration detection device.

Background

The flowmeter is an instrument for measuring the flow rate of fluid in a pipeline or an open channel, and can be divided into a liquid flowmeter and a gas flowmeter according to a flowing medium, and can be divided into a differential pressure flowmeter, a rotor flowmeter, a throttling flowmeter, a slit flowmeter, a volume flowmeter, an electromagnetic flowmeter, an ultrasonic flowmeter and the like according to a working form.

In order to ensure the use precision of the flowmeter, the flowmeter needs to be calibrated and detected regularly. The calibration method of the flowmeter mainly comprises a volume method, a weighing method, a standard flowmeter method and the like. However, in practical applications, the following problems still exist when the calibration of the liquid flow meter is performed by the standard flow meter method: 1. before calibration operation, the to-be-calibrated flowmeter is difficult to clamp, two or three persons are often required to operate simultaneously to ensure normal clamping work of the to-be-calibrated flowmeter, the clamping efficiency is low, and the coaxiality of the to-be-calibrated flowmeter and front and rear pipelines cannot be ensured, so that the calibration quality is influenced; 2. after the calibration operation is completed, the detection liquid is remained in the calibration detection device and cannot be discharged completely, so that the waste of the detection liquid is caused, meanwhile, the detection liquid is remained in the calibration detection device for a long time, corrosion can be caused to equipment and pipelines used for calibration, the service life of the calibration detection device is shortened, the accuracy of subsequent calibration detection is influenced, and the improvement is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a can quick accurate clamping treat mark flowmeter, can arrange clean detection liquid and can wash dry flowmeter and mark detection device to solve above-mentioned problem.

In order to achieve the above object, the utility model adopts the following technical scheme: a flowmeter calibration detection device comprises a liquid storage tank, a liquid pump, a pressure stabilizing tank, a filter tank, a front straight pipe section, a rear straight pipe section and a return pipeline, wherein an outlet of the liquid storage tank is communicated with an inlet of the liquid pump, an outlet of the liquid pump is communicated with an inlet of the pressure stabilizing tank, an outlet of the pressure stabilizing tank is communicated with an inlet of the filter tank, the front straight pipe section and the rear straight pipe section are coaxial, an outlet of the rear straight pipe section is communicated with an inlet of the return pipeline, a standard flowmeter is arranged on the return pipeline, the flowmeter further comprises a water storage tank, a gas storage tank and a waste water tank, a flushing pipeline is communicated with the inlet of the pressure stabilizing tank, a water outlet of the water storage tank is communicated with the flushing pipeline through a water inlet pipe with the water pump, a gas outlet of the gas storage tank is communicated with the flushing pipeline through a gas inlet pipe with a gas pump, a telescopic corrugated pipe is communicated with the, the outlet of the return pipeline is connected with a three-way valve, and two outlets of the three-way valve are respectively communicated with the inlet of the liquid storage tank and the inlet of the waste water tank; the to-be-calibrated flowmeter clamping mechanism comprises a workbench arranged below a front straight pipe section and a rear straight pipe section, wherein one end of the workbench close to the rear straight pipe section is vertically and fixedly provided with a first supporting plate, the other end of the workbench slides along the length direction of the workbench and is vertically provided with a second supporting plate, the end where the inlet of the rear straight pipe section is arranged is fixedly erected on the first supporting plate, the end where the outlet of the front straight pipe section is arranged is fixedly erected on the second supporting plate, a base is arranged on the workbench between the first supporting plate and the second supporting plate in a sliding manner along the length direction of the workbench, a bottom plate is arranged above the base, two lifting oil cylinders are symmetrically arranged at the two ends of the base, piston rods of the lifting oil cylinders are upward and fixedly connected to the corresponding bottom plate bottom surfaces, connecting plates are arranged at the two ends of the top surface of the bottom plate, a bidirectional screw rod is rotatably arranged between the, an inverted trapezoidal placing groove is formed in the top of the clamping plate.

Preferably, two T-shaped guide rails are symmetrically arranged on two sides of one end, close to the front straight pipe section, of the workbench, electric sliding blocks matched with the guide rails are arranged on two sides of the bottom of the second supporting plate and four corners of the bottom of the base, and the electric sliding blocks are connected to the guide rails in a sliding mode.

Preferably, one end of the bidirectional screw rod extends out of the corresponding connecting plate, and a handle is fixedly connected to the end face of the end of the bidirectional screw rod.

Preferably, two guide shafts are symmetrically arranged on two sides of the bidirectional screw rod, two ends of each guide shaft are fixedly connected to the corresponding connecting plates, and two sides of the bottom end of the clamping plate are sleeved on the corresponding guide shafts in a sliding mode.

Preferably, the rose box includes the box, box one side lower part is equipped with the import, opposite side upper portion is equipped with the export, the filter screen has been cup jointed to the box internal screw thread between import and the export, the vertical pivot that has set firmly in filter screen top center, the box top is stretched out and is equipped with spacing flange in pivot top, the bottom half intercommunication has the blow off pipe that has the valve.

Preferably, the rotating shaft is connected with the top of the box body in a sealing and rotating mode through a shaft sleeve.

Preferably, a humidity sensor is arranged on a pipeline for communicating the inlet of the waste water tank with the three-way valve, and an exhaust pipe is arranged on the waste water tank.

The utility model has the advantages that: the utility model relates to a rationally, compact structure treats to mark in the flowmeter clamping mechanism, and two clamping boards of seting up the trapezoidal standing groove of falling can be used for bearing the weight of and support and treat to mark the flowmeter, and through the just reverse rotation of two-way lead screw, alright drive two clamping boards and be close to each other or keep away from to can load and support the different specifications size of waiting to mark the flowmeter, satisfy and mark the demand, enlarge device application range, can improve device's use flexibility and convenience greatly. Meanwhile, the vertical movement of the flowmeter to be calibrated can be realized through the arrangement of the lifting oil cylinder, the base is in sliding connection with the workbench, and the transverse movement of the flowmeter to be calibrated can be realized, so that the flowmeter to be calibrated can be quickly adjusted in place, and can be accurately centered with the rear straight pipe section.

The air storage tank and the water storage tank are arranged, so that after calibration operation, clean air in the air storage tank is firstly introduced into the calibration loop through the flushing pipeline, and detection liquid remained in the calibration loop can be pushed back into the liquid storage tank by utilizing the pressure of the air; then, flushing water in the water storage tank can be introduced into the calibration loop through the flushing pipeline, the calibration loop is flushed, and the flushed wastewater is guided into the wastewater tank by using the three-way valve; and finally, clean air in the air storage tank can be introduced into the calibration loop again, residual flushing water is pushed back into the wastewater tank, and the calibration loop is dried, so that residual detection liquid can be discharged completely, the waste and the pollution to the surrounding environment of the detection liquid are avoided, the calibration loop can be flushed and dried, the cleanliness of each calibration pipeline and calibration equipment is ensured, the corrosion of the detection liquid is prevented, the service life of each calibration pipeline and calibration equipment is prolonged, and the quality of subsequent calibration operation is ensured.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the filter box of the present invention;

FIG. 3 is a schematic structural view of the clamping mechanism of the to-be-calibrated flowmeter of the present invention;

FIG. 4 is a schematic diagram of a right-view structure of the clamping mechanism of the to-be-calibrated flowmeter of the present invention;

fig. 5 is a schematic top view of the bottom plate of the present invention;

fig. 6 is a schematic structural view of the clamping plate of the present invention.

Reference numbers in the figures: 1 is a liquid storage tank, 2 is a valve, 3 is a liquid pump, 4 is a flushing pipeline, 5 is a gas storage tank, 6 is an air inlet pipe, 7 is an air pump, 8 is a water storage tank, 9 is a water inlet pipe, 10 is a water pump, 11 is a pressure stabilizing tank, 12 is a filter tank, 13 is a telescopic corrugated pipe, 14 is a front straight pipe section, 15 is a to-be-calibrated flowmeter clamping mechanism, 16 is a rear straight pipe section, 17 is a return pipeline, 18 is a standard flowmeter, 19 is a waste water tank, 20 is an exhaust pipe, 21 is a humidity sensor, 22 is a three-way valve, 16 is a tank cover, 17 is a partition plate, 18 is an exhaust chamber, 19 is a filter chamber, 20 is an exhaust valve, 21 is a lever, 22 is a floating ball, 23 is a tank body, 24 is a filter screen, 25 is an inlet, 26 is an outlet, 27 is a shaft sleeve, 28 is a rotating shaft, 29 is a limiting flange, 30 is a drain pipe, 31 is a workbench, 32 is a, 36 is a base, 37 is a lifting oil cylinder, 38 is a bottom plate, 39 is a connecting plate, 40 is a bidirectional screw rod, 41 is a clamping plate, 42 is a handle, 43 is a guide shaft, and 44 is a placing groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 6, a flowmeter calibration detection device comprises a liquid storage tank 1, a liquid pump 3, a surge tank 11, a filter tank 12, a front straight pipe section 14, a rear straight pipe section 16 and a return line 17, wherein an outlet of the liquid storage tank 1 is communicated with an inlet of the liquid pump 3, an outlet of the liquid pump 3 is communicated with an inlet of the surge tank 11, an outlet of the surge tank 11 is communicated with an inlet 25 of the filter tank 12, the front straight pipe section 14 is coaxial with the rear straight pipe section 16, an outlet of the rear straight pipe section 16 is communicated with an inlet of the return line 17, and the return line 17 is provided with a standard flowmeter 18. Also comprises a water storage tank 8, an air storage tank 5 and a waste water tank 19. The inlet of the pressure stabilizing tank 11 is communicated with a flushing pipeline 4, and the water outlet of the water storage tank 8 is communicated with the flushing pipeline 4 through a water inlet pipe 9 with a water pump 10. The air outlet of the air storage tank 5 is communicated with the flushing pipeline 4 through an air inlet pipe 6 with an air pump 7. The inlet of the front straight pipe section 14 is communicated with a telescopic corrugated pipe 13, the telescopic corrugated pipe 13 is communicated with the outlet 26 of the filter box 12, the axial movement of the front straight pipe section 14 is realized by utilizing the scalability of the telescopic corrugated pipe 13, and the clamping of the flowmeter to be calibrated is conveniently completed in a matching manner. A gap is formed between the outlet of the front straight pipe section 14 and the inlet of the rear straight pipe section 16, and a to-be-calibrated flowmeter clamping mechanism 15 is arranged for clamping a calibrated flowmeter. The outlet of the return pipeline 17 is connected with a three-way valve 22, and two outlets of the three-way valve 22 are respectively communicated with the inlet of the liquid storage tank 1 and the inlet of the waste water tank 19. During practical use, the flushing pipeline 4 and the communicating pipelines of the inlets and the outlets are respectively provided with the valve 2, after the to-be-calibrated flowmeter is clamped by the to-be-calibrated flowmeter clamping mechanism 15, and the to-be-calibrated flowmeter and the standard flowmeter 18 are electrically connected with a control center (not shown in the figure, but not described in detail in the prior art), calibration detection operation can be performed by using a calibration loop formed by the liquid storage tank 1, the liquid pump 3, the pressure stabilizing tank 11, the filter tank 12, the front straight pipe section 14, the to-be-calibrated flowmeter, the rear straight pipe section 16, the return pipeline 17 and the standard flowmeter 18. And the setting of gas holder 5 and water storage tank 8 can be after the operation of maring detection is accomplished, through washing pipeline 4 earlier to the clean air that lets in gas holder 5 in the return circuit of maring, can utilize the pressure of air to push back the liquid reserve tank 1 with the detection liquid that remains in the return circuit of maring. Then, the flushing water in the water storage tank 8 can be introduced into the calibration loop through the flushing pipeline 4 again to flush the calibration loop, and the flushed wastewater is guided into the wastewater tank 19 by using the three-way valve 22. Finally, clean air in the air storage tank 5 can be introduced into the calibration loop again, the residual flushing water is pushed back into the waste water tank 19 and the calibration loop is dried, so that the residual detection liquid can be completely discharged, the waste and the pollution to the surrounding environment caused by the detection liquid are avoided, the calibration loop can be flushed and dried, the cleanliness of each calibration pipeline and each calibration device is ensured, the corrosion of the detection liquid is prevented, the service life of each calibration pipeline and each calibration device is prolonged, and the quality of subsequent calibration operation is ensured.

The to-be-calibrated flowmeter clamping mechanism 15 comprises a workbench 31 arranged below a front straight pipe section 14 and a rear straight pipe section 16, one end, close to the rear straight pipe section 16, of the workbench 31 is vertically and fixedly provided with a first supporting plate 32, the other end of the workbench 31 slides along the length direction of the workbench and is vertically provided with a second supporting plate 35, the end, at which the inlet of the rear straight pipe section 16 is located, is fixedly erected on the first supporting plate 32, and the end, at which the outlet of the front straight pipe section 14 is located, is fixedly erected on the second supporting plate 35. A base 36 is slidably arranged on the workbench 31 between the first support plate 32 and the second support plate 35 along the length direction thereof, a bottom plate 38 is arranged above the base 36, two lifting cylinders 37 are symmetrically arranged at two ends of the base 36, and piston rods of the lifting cylinders 37 face upwards and are fixedly connected to the bottom surfaces of the corresponding bottom plates 38. The two ends of the top surface of the bottom plate 38 are respectively provided with a connecting plate 39, a bidirectional screw rod 40 is rotatably arranged between the middle parts of the two connecting plates 39, two thread sections of the bidirectional screw rod 40 are respectively in threaded sleeve connection with a clamping plate 41, and the top of the clamping plate 41 is provided with an inverted trapezoidal placement groove 44. During the use, two clamping boards 41 of seting up trapezoidal standing groove 44 can be used for bearing the weight of and support the flowmeter of waiting to markd, and just reverse rotation through two-way lead screw 40, alright drive two clamping boards 41 and be close to each other or keep away from to can load and support the flowmeter of waiting to mark of different specifications size, satisfy and mark the demand, enlarge device application range, can improve the use flexibility and the convenience of device greatly. Meanwhile, the vertical movement of the flowmeter to be calibrated can be realized by the arrangement of the lifting oil cylinder 37, the base 36 is in sliding connection with the workbench 31, and the transverse movement of the flowmeter to be calibrated can be realized, so that the flowmeter to be calibrated can be quickly adjusted in place, and can be accurately centered with the rear straight pipe section 16, then the position of the front straight pipe section 14 can be adjusted by the sliding connection of the second supporting plate 35 and the workbench 31, the concentric axial butt joint of the flowmeter to be calibrated with the front straight pipe section 14 and the rear straight pipe section 16 can be realized, the operation is simple and convenient, the operation can be completed by only one person, the operation difficulty and the labor intensity of clamping the flowmeter to be calibrated can be greatly reduced, the coaxiality of the flowmeter to be calibrated and front and rear pipelines can be ensured.

In this embodiment, two T-shaped guide rails 33 are symmetrically disposed on two sides of one end of the worktable 31 close to the front straight tube section 14, and two sides of the bottom of the second support plate 35 and four corners of the bottom of the base 36 are respectively provided with an electric slider 34 adapted to the guide rails 33, so that the second support plate 35 and the base 36 can be slidably connected to the guide rails 33 through the corresponding electric sliders 34, and the front straight tube section 14 and the flow meter to be calibrated can be moved laterally in a matched manner.

In this embodiment, one end of the bidirectional screw 40 extends out of the corresponding connecting plate 39 and a handle 42 is fixedly connected to the end face of the end, so as to conveniently control the bidirectional screw 40 to rotate forwards and backwards. The bilateral symmetry of two-way lead screw 40 is equipped with two guiding axles 43, and the both ends fixed connection of guiding axle 43 is on corresponding connecting plate 39, and the bottom both sides of clamping board 41 all slide to cup joint on the guiding axle 42 that corresponds, utilizes guiding axle 43 can lead and spacing to the removal of clamping board 41, makes the removal of clamping board 41 more steady.

In this embodiment, the filter box 12 includes a box 23, and the box 23 has an inlet 25 at a lower portion of one side and an outlet 26 at an upper portion of the other side for respectively inputting and outputting the detection liquid. The filter screen 24 is sleeved on the inner thread of the box body 23 between the inlet 25 and the outlet 26 and used for filtering and removing impurities of the detection liquid and ensuring the accuracy of calibration detection. The center of the top of the filter screen 24 is vertically and fixedly provided with a rotating shaft 28, the top end of the rotating shaft 28 extends out of the top of the box body 23 and is provided with a limiting flange 29, the rotating shaft 28 can be controlled to rotate to drive the filter screen 24 to rotate in the box body 23 to ascend or descend, so that the position of the filter screen 24 is changed, the filter screen 24 can be positioned between an inlet 25 and an outlet 26 when the detection operation is calibrated, the detection liquid is filtered and purified, the filter screen 24 can be positioned below the inlet 25 when the ventilation and water flushing operation is performed, the filter screen 24 is backwashed by the introduced flushing water under the condition that the flow of air and water is not influenced, the filter screen is kept clean, and the filtering effect of the filter screen 24. The bottom of the tank 23 is communicated with a drainage pipe 30 having a valve 2 for discharging the filtered impurities. The rotating shaft 28 is connected with the top of the box body 23 in a sealing and rotating mode through the shaft sleeve 27, so that the sealing performance of the box body 23 is guaranteed, the rotation of the rotating shaft 28 is not influenced, and the position of the filter screen 24 is conveniently and smoothly adjusted.

In this embodiment, the pipeline that waste water tank 19 import and three-way valve 22 communicate is equipped with humidity transducer 21, and during the in-service use, humidity transducer 21 is connected with the control center electricity for when drying process, detect the humidity information of the air that flows through, judge the drying degree with this, convenient control. The waste water tank 19 is provided with an exhaust pipe 20 for exhausting tail gas.

The utility model discloses a theory of operation: the utility model discloses when using, rotate two-way lead screw 40 earlier through handle 42, according to waiting to mark the distance between the big or small two clamping boards 41 of good adjustment of flowmeter, then will wait to mark the flowmeter and place on the standing groove 44 of two clamping boards 41. Then, the vertical and horizontal movement of the flowmeter to be calibrated is realized through the action of the lifting oil cylinder 37 and the electric slide block 34, and the outlet of the flowmeter to be calibrated is accurately centered and attached to the inlet of the rear straight pipe section 16. Then, the electric slide block 34 on the second support plate 35 is used to drive the second support plate 35 and the front straight pipe section 14 thereon to move towards the flowmeter to be calibrated until the outlet of the second support plate is butted with the inlet of the flowmeter to be calibrated, so as to complete the concentric axial butt joint of the flowmeter to be calibrated with the front straight pipe section 14 and the rear straight pipe section 16. Then, the valves 2 on the communication pipelines can be opened, the devices are operated, and the calibration is started, specifically: the three-way valve 22 is communicated with an inlet of the liquid storage tank 1, liquid for detection is pumped out from the liquid storage tank 1 by the liquid pump 3, then flows through the pressure stabilizing tank 11, the filter tank 12, the front straight pipe section 14, the flowmeter to be calibrated, the rear straight pipe section 16, the return pipeline 17, the standard flowmeter 18 and the three-way valve 22 in sequence through all communicating pipelines, finally flows back into the liquid storage tank 1, the control center receives and analyzes all detection data, and calibration detection of the flowmeter to be calibrated is completed by comparing all detection data of the flowmeter to be calibrated and the standard flowmeter.

After the calibration operation is completed, the valve 2 on the drainage pipe 30 of the filter box 12 is opened to drain the impurities, and the filter screen 24 is rotated to the lower part of the inlet 25 by rotating the rotating shaft 27. Then, the valve 2 on the communicating pipeline of the liquid pump 3 and the inlet of the pressure stabilizing tank 11 is closed, the valve 2 on the flushing pipeline 4 is opened, clean air in the air storage tank 5 is conveyed into the pressure stabilizing tank 11 through the air pump 7, the clean air flows through the pressure stabilizing tank 11, the filter box 12, the front straight pipe section 14, the flowmeter to be calibrated, the rear straight pipe section 16, the return pipeline 17, the standard flowmeter 18 and the three-way valve 22 and is finally conveyed into the liquid storage tank 1, and in the process, under the pressure of the air, detection liquid remained in each pipeline and equipment can be pushed back into the liquid storage tank 1 to drain the detection liquid. Then, the air pump 7 is closed, the three-way valve 22 is communicated with the inlet of the waste water tank 19, the water pump 10 is operated, the flushing water in the water storage tank 8 is conveyed into the pressure stabilizing tank 11 through the water pump 10, the flushing water flows through the pressure stabilizing tank 11, the filter tank 12, the front straight pipe section 14, the flow meter to be calibrated, the rear straight pipe section 16, the return pipeline 17, the standard flow meter 18 and the three-way valve 22 and is finally conveyed into the waste water tank 19, and flushing treatment is carried out on all pipelines and equipment. After the washing is finished, the water pump 10 is closed, the air pump 7 is operated, clean air is introduced into the pressure stabilizing tank 11 again, the clean air flows through the pressure stabilizing tank 11, the filter box 12, the front straight pipe section 14, the flow meter to be calibrated, the rear straight pipe section 16, the return pipeline 17, the standard flow meter 18 and the three-way valve 22 and is finally conveyed into the waste water tank 19, in the process, under the pressure of the air, washing water remained in each pipeline and equipment can be pushed into the waste water tank 19, the washing water is drained, each pipeline and equipment are dried, the humidity of the flowing air is detected by using a humidity sensor 21 arranged on a pipeline communicated with the three-way valve 22 at the inlet of the waste water tank 19, the drying degree is judged until the drying degree reaches the standard, and the air entering the waste water tank 19 is discharged through an exhaust pipe 20 on the waste water tank 19.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A flowmeter calibration detection device comprises a liquid storage tank, a liquid pump, a pressure stabilizing tank, a filter tank, a front straight pipe section, a rear straight pipe section and a return pipeline, wherein an outlet of the liquid storage tank is communicated with an inlet of the liquid pump, an outlet of the liquid pump is communicated with an inlet of the pressure stabilizing tank, an outlet of the pressure stabilizing tank is communicated with an inlet of the filter tank, the front straight pipe section and the rear straight pipe section are coaxial, an outlet of the rear straight pipe section is communicated with an inlet of the return pipeline, and a standard flowmeter is arranged on the return pipeline. The outlet of the return pipeline is connected with a three-way valve, and two outlets of the three-way valve are respectively communicated with the inlet of the liquid storage tank and the inlet of the waste water tank; the to-be-calibrated flowmeter clamping mechanism comprises a workbench arranged below a front straight pipe section and a rear straight pipe section, wherein one end of the workbench close to the rear straight pipe section is vertically and fixedly provided with a first supporting plate, the other end of the workbench slides along the length direction of the workbench and is vertically provided with a second supporting plate, the end where the inlet of the rear straight pipe section is arranged is fixedly erected on the first supporting plate, the end where the outlet of the front straight pipe section is arranged is fixedly erected on the second supporting plate, a base is arranged on the workbench between the first supporting plate and the second supporting plate in a sliding manner along the length direction of the workbench, a bottom plate is arranged above the base, two lifting oil cylinders are symmetrically arranged at the two ends of the base, piston rods of the lifting oil cylinders are upward and fixedly connected to the corresponding bottom plate bottom surfaces, connecting plates are arranged at the two ends of the top surface of the bottom plate, a bidirectional screw rod is rotatably arranged between the, an inverted trapezoidal placing groove is formed in the top of the clamping plate.

2. The flowmeter calibration detection device as claimed in claim 1, wherein two T-shaped guide rails are symmetrically arranged on two sides of one end of the workbench near the front straight pipe section, electric sliders adapted to the guide rails are arranged on two sides of the bottom of the second support plate and four corners of the bottom of the base, and the electric sliders are slidably connected to the guide rails.

3. The flowmeter calibration detection device as claimed in claim 1, wherein one end of the bidirectional screw rod extends out of the corresponding connecting plate and a handle is fixedly connected to the end surface of the end.

4. The flowmeter calibration detection device as claimed in claim 1, wherein two guide shafts are symmetrically arranged on two sides of the bidirectional screw rod, two ends of each guide shaft are fixedly connected to corresponding connecting plates, and two sides of the bottom end of the clamping plate are slidably sleeved on the corresponding guide shafts.

5. The flowmeter calibration detection device as claimed in claim 1, wherein the filter box comprises a box body, an inlet is arranged at the lower part of one side of the box body, an outlet is arranged at the upper part of the other side of the box body, a filter screen is sleeved in the box body between the inlet and the outlet through threads, a rotating shaft is vertically and fixedly arranged at the center of the top of the filter screen, the top end of the rotating shaft extends out of the top of the box body and is provided with a limiting flange, and the bottom of the box body is communicated with a drain pipe with.

6. The flowmeter calibration detection device as claimed in claim 5, wherein the rotating shaft is connected with the top of the box body in a sealing and rotating manner through a shaft sleeve.

7. The flowmeter calibration detection device as claimed in claim 1, wherein a humidity sensor is arranged on a pipeline connecting an inlet of the waste water tank and the three-way valve, and an exhaust pipe is arranged on the waste water tank.