Metering precision detection device for flowmeter

Abstract

The invention relates to the field of instrument detection tools, in particular to a flowmeter metering precision detection device which comprises a workbench, a control cabinet, a drainage box, a test box, an electric air cylinder, an electronic scale, a liquid injection pipe and the like. The control cabinet, the drainage box and the electronic scale are sequentially installed on the workbench, the electric air cylinder drives the test box to slide in the drainage box, a first installation plate, a second installation plate and an adjusting plate are arranged on the installation frame, a liquid injection pipe is fixed through cooperation of a first motor, a rotating shaft, a bevel gear, a clamping block and the like, and the liquid injection pipe can be straightened through cooperation of a second motor, a gear, a rack and the like. The liquid injection pipe straightening device has the beneficial effects that the liquid injection pipe can be prevented from being bent, a second motor drives a gear to be in meshing transmission with a rack, and an adjusting plate drives an upper end clamping block to move upwards to straighten the liquid injection pipe; the grooves in the inner sides of the clamping blocks can better fix the liquid injection pipe; the connecting arm, the spring and the limiting rod assist in stretching, stabilizing and fixing the liquid injection pipe, the stability of the liquid injection pipe during detection is improved, and finally the accuracy of metering precision detection of the flowmeter is improved.

Description

Technical Field

[0001] The invention relates to the field of instrument detection tools, in particular to a flow meter measurement accuracy detection device. Background Art

[0002] A flow meter is an instrument used to measure fluid flow. In the fields of industrial production, energy management, environmental monitoring, etc., accurate measurement of fluid flow is crucial, which highlights the necessity of measuring flow meter accuracy. In industrial production processes, industries such as chemical and pharmaceutical industries require extremely high flow control accuracy for various fluids. Taking chemical synthesis reactions as an example, if the flow ratio of raw materials is inaccurate, it will cause incomplete reactions, reduce product quality, and may even cause safety accidents. In the prior art, the flow meter measurement accuracy test is to push the injection tube into the test box through an air pump. The liquid will drift away at the moment the air pump pushes the injection tube, and the flow rate will also decrease due to the instantaneous force. This method is not accurate enough in measurement accuracy when used. In addition, the bent injection tube will also cause the flow rate to slow down, and the flow rate per unit time is quite different from the actual situation.

[0003] Therefore, it is necessary to propose a flow meter measurement accuracy detection device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a flow meter measurement accuracy detection device to solve the problem that the bending of the injection tube will also cause the flow rate to slow down and the air pump pushes the liquid in the injection tube to drift, resulting in inaccurate accuracy.

[0005] To achieve the above object, the present invention provides the following technical solutions: A flow meter measurement accuracy detection device comprises a workbench, a control cabinet, a drainage box, a test box, an electric cylinder, an electronic scale, and a liquid injection pipe. The control cabinet, the drainage box, and the electronic scale are arranged and installed on the workbench in sequence. The electric cylinder is installed on the inner wall of the drainage box. The electric cylinder is connected to the test box by driving, and the test box is arranged inside the drainage box. A sliding rod 1 is fixedly connected to the inner wall of the drainage box, and the test box is slidably connected to the sliding rod 1. A mounting frame is also fixedly installed on the workbench, and the mounting frame is arranged above the drainage box, and the mounting frame is in the shape of an "I". A mounting plate 1 and a mounting plate 2 are fixedly connected on both sides of the inner wall of the mounting frame, and an adjustment plate is slidably connected to the inner side of the mounting plate 1. A motor 1 is fixedly installed on the outer side of one of the mounting plates 1, and the motor 1 is driven and connected to a rotating shaft 1. A detachable connecting component is installed on the top of the rotating shaft 1, and the rotating shaft 1 is connected to a rotating shaft 2 through the detachable connecting component. A bevel gear 1 is installed on the ends of the rotating shaft 1 and the rotating shaft 2 that are away from each other, and the bevel gear 1 is meshingly connected to the bevel gear 2. A roller is installed on the bevel gear 2, and the roller passes through the mounting plate 1. Both ends of the roller are provided with threads, and the threads at both ends are screwed in opposite directions. A clamping block is threadedly installed on the thread, and a sliding rod 2 is connected between the two mounting plates 1. The bottom of the clamping block is slidably installed on the sliding rod 2, and the clamping block is used to clamp and fix the injection tube; A second motor is fixedly mounted on one of the adjustment plates, and a gear is connected to the second motor for driving the second motor. A rack is fixedly mounted on the inner side of the second mounting plate, and the gear is meshed with the rack. An empty slot is provided in the middle of the second mounting plate, and a transmission shaft connecting the gear and the second motor is slidably connected to the empty slot.

[0006] Preferably, a groove is provided on the inner side of the clamping block.

[0007] Preferably, two guide rods are fixedly mounted on both left and right sides of the mounting plate, and a sliding sleeve is mounted in an array on the inner wall of the adjustment plate, and the sliding sleeve is movably mounted on the outer side of the guide rod.

[0008] Preferably, a slide groove is provided on one side of the second mounting plate close to the adjustment plate, and a slide bar is provided on one side of the adjustment plate close to the second mounting plate, and the slide bar is slidably connected inside the slide groove.

[0009] Preferably, the detachable connecting component includes a lower connecting member and an upper connecting member, the bottom of the lower connecting member is connected to rotating shaft one, the top of the upper connecting member is connected to rotating shaft two, a bar buckle is movably installed at the bottom of the lower connecting member, and one end of the bar buckle passes through the upper connecting member, and bar slots are arranged on both sides of the upper connecting member, and the size of the bar buckle is adapted to the size of the bar slot.

[0010] Preferably, the four guide rods are all slidably connected with a connecting arm, one end of the connecting arm is movably overlapped on the sliding sleeve, one end of the connecting arm is fixedly connected with a spring, the other end of the spring is connected to a limiting rod, and the limiting rod is "L" shaped.

[0011] Preferably, the limiting rod on any one of the connecting arms is movably connected to the limiting rod on the opposite side, and the injection tube is arranged between the two fixedly connected limiting rods.

[0012] Preferably, a cylindrical protrusion is provided at one end of the limiting rod, a hole groove is provided at one side of the limiting rod, and a rubber pad is installed on the inner wall of the limiting rod.

[0013] Preferably, the top of the injection pipe is connected to a flow meter detection port, and the bottom of the injection pipe is arranged above the drainage box.

[0014] Preferably, the connection between the electric cylinder and the test box is a detachable connection, and the electric cylinder is communicatively connected to the control cabinet.

[0015] Technical effects and advantages of the present invention: 1. The gear and rack are meshed and driven by the second motor, the adjustment plate is slidably connected with the mounting plate, and the detachable component disconnects the transmission connection between the first shaft and the second shaft, so that the adjustment plate drives the upper clamp block to move upward, thereby straightening the injection tube to avoid bending.

[0016] 2. Start motor 1, which drives bevel gear 1 on shaft 1 to rotate. Bevel gear 1 meshes with bevel gear 2 to rotate the roller. The threads at both ends of the roller drive the clamping blocks to approach each other under the guidance of slide rod 2, thereby clamping the injection tube.

[0017] 3. One end of the connecting arm on the four guide rods is overlapped on the sliding sleeve, and the other end is connected to the spring and the limit rod. After the injection tube is stretched, the connecting arms are fixed in pairs, and the injection tube is located between them. When the adjustment plate drives the clamping block to move up, the connecting arm also moves up to assist in stretching. At the same time, the limit rod and rubber pad better fix the injection tube to keep it stable during injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the flow meter measurement accuracy detection device of the present invention.

[0019] Figure 2 It is a schematic diagram of the internal structure of the drainage box of the present invention.

[0020] Figure 3 It is a schematic diagram of the overall structure of the mounting frame of the present invention.

[0021] Figure 4 It is a schematic diagram of the clamping block driving structure of the present invention.

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the proposed enlarged structure at point A.

[0023] Figure 6 For the present invention Figure 4 Schematic diagram of the proposed enlarged structure at location B.

[0024] Figure 7 For the present invention Figure 4 Schematic diagram of the proposed enlarged structure at location C.

[0025] Figure 8 It is a schematic diagram of the installation structure of the adjustment plate and the installation plate of the present invention.

[0026] Fig. 9 For the present invention Figure 8 Schematic diagram of the proposed enlarged structure at D.

[0027] Fig.10 This is a schematic diagram of the installation and fixing structure of the limit rod of the present invention.

[0028] Fig.11 For the present invention Fig.10 Schematic diagram of the proposed enlarged structure at E.

[0029] In the figure: 1, workbench; 2, control cabinet; 3, drainage box; 4, test box; 5, electric cylinder; 6, electronic scale; 7, mounting frame; 8, mounting plate 1; 801, motor 1; 802, shaft 1; 803, shaft 2; 804, bevel gear 1; 805, bevel gear 2; 806, thread; 807, clamping block; 808, slide rod 2; 809, groove; 810, guide rod; 9, mounting plate 2; 901, rack; 902 , empty slot; 903, slide slot; 10, adjustment plate; 1001, motor 2; 1002, gear; 1003, sleeve; 11, detachable connecting assembly; 1101, lower connecting piece; 1102, upper connecting piece; 1103, bar buckle; 1104, bar slot; 12, injection tube; 13, connecting arm; 1301, spring; 1302, limit rod; 1303, columnar protrusion; 1304, hole slot; 1305, rubber pad. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides Figure 1-Figure 11 The flow meter measurement accuracy detection device shown includes a workbench 1, a control cabinet 2, a drainage box 3, a test box 4, an electric cylinder 5, an electronic scale 6, and a liquid injection pipe 12. The control cabinet 2, the drainage box 3 and the electronic scale 6 are installed on the workbench 1 in sequence. The electric cylinder 5 is installed on the inner wall of the drainage box 3. The electric cylinder 5 is connected to the test box 4 by driving, and the test box 4 is arranged inside the drainage box 3. A sliding rod 301 is fixedly connected to the inner wall of the drainage box 3, and the test box 4 is slidably connected to the sliding rod 301. A mounting frame 7 is also fixedly installed on the workbench 1. The mounting frame 7 is arranged above the drainage box 3, and the mounting frame 7 is in the shape of an "I". Both sides of the inner wall of the mounting frame 7 are fixedly connected to a mounting plate 1 8 and a mounting plate 2 9, and an adjusting plate 10 is slidably connected to the inner side of the mounting plate 8; A motor 801 is fixedly installed on the outer side of one of the mounting plates 8, and the motor 801 is driven and connected to a rotating shaft 802. A detachable connecting component 11 is installed on the top of the rotating shaft 802, and the rotating shaft 802 is connected to a rotating shaft 2 803 through the detachable connecting component 11. A bevel gear 804 is installed on the ends of the rotating shaft 802 and the rotating shaft 2 803 that are away from each other, and the bevel gear 804 is meshingly connected to a bevel gear 2 805. A roller is installed on the bevel gear 2 805, and the roller passes through the mounting plate 8. Both ends of the roller are provided with threads 806, and the threads 806 at both ends are screwed in opposite directions. A clamping block 807 is threadedly installed on the thread 806. A sliding rod 2 808 is connected between the two mounting plates 8. The bottom of the clamping block 807 is slidably installed on the sliding rod 2 808, and the clamping block 807 is used to clamp and fix the injection tube 12; A second motor 1001 is fixedly mounted on one of the adjustment plates 10, and a gear 1002 is driven and connected to the second motor 1001. A rack 901 is fixedly mounted on the inner side of the second mounting plate 9, and the gear 1002 is meshed with the rack 901. An empty slot 902 is provided in the middle of the second mounting plate 9, and a transmission shaft connecting the gear 1002 and the second motor 1001 is slidably connected to the empty slot 902.

[0032] Furthermore, the top of the injection pipe 12 is connected to the flow meter detection port, and the bottom of the injection pipe 12 is arranged above the drainage box 3.

[0033] Furthermore, the connection between the electric cylinder 5 and the test box 4 is a detachable connection, and the electric cylinder 5 is communicatively connected with the control cabinet 2 .

[0034] In one embodiment of the present invention, when the flow meter metering accuracy test is performed, the injection tube 12 is first aligned with the drainage box 3, the top of the injection tube 12 is connected to the flow meter detection port, the injection tube 12 is placed between the clamping blocks 807, and the motor 801 is started. The motor 801 drives the bevel gear 1 804 on the rotating shaft 802 to rotate, and the bevel gear 1 804 is meshed with the bevel gear 2 805 for transmission. The clamping blocks 807 are guided by the transmission of the thread 806 and the slide rod 2 808 to clamp the injection tube 12. When the injection tube 12 needs to be stretched to avoid bending, the gear 1002 is driven by the motor 2 1001 to mesh with the rack 901 for transmission, and the adjustment plate 10 is slidably connected to the mounting plate 1 8. The mounting plate 1 8 and the mounting plate 2 9 are fixedly connected to the mounting frame 7, and the detachable components are used. 11 disconnects the transmission connection between the rotating shaft 1 802 and the rotating shaft 2 803, so that the adjustment plate 10 drives the clamping block 807 at the upper end to move upward, thereby straightening the injection pipe 12; after the injection pipe 12 is fixed and adjusted, the injection pipe 12 begins to inject water into the drainage box 3 through the flow meter detection port, and after a period of time, the timing system inside the control cabinet 2 immediately starts timing. At the same time, the electric cylinder 5 pushes the test box 4 to move below the water outlet of the injection pipe 12, and the injection pipe 12 begins to inject water into the test box 4. After a period of time, the water injection is stopped, and the timing is stopped immediately. After the water in the injection pipe 12 flows out, the test box 4 is removed, and the test box 4 is placed on the electronic scale 6 for weighing. After removing the weight of the test box 4 itself, combined with the water injection time and the liquid weight, the control cabinet 2 calculates the flow meter measurement accuracy data.

[0035] Furthermore, a groove 809 is provided on the inner side of the clamping block 807, and the groove 809 is used to better adapt to the shape of the injection tube 12 for easy fixation.

[0036] Furthermore, two guide rods 810 are fixedly installed on the left and right sides of the mounting plate 8 , and a sliding sleeve 1003 is installed in an array on the inner wall of the adjustment plate 10 , and the sliding sleeve 1003 is movably sleeved on the outer side of the guide rod 810 .

[0037] Furthermore, a slide groove 903 is provided on one side of the mounting plate 2 9 close to the adjusting plate 10 , and a slide bar is provided on one side of the adjusting plate 10 close to the mounting plate 2 9 , and the slide bar is slidably connected inside the slide groove 903 .

[0038] Furthermore, the detachable connecting component 11 includes a lower connecting member 1101 and an upper connecting member 1102. The bottom of the lower connecting member 1101 is connected to the rotating shaft 1 802, and the top of the upper connecting member 1102 is connected to the rotating shaft 2 803. A bar buckle 1103 is movably installed at the bottom of the lower connecting member 1101, and one end of the bar buckle 1103 passes through the upper connecting member 1102. Bar slots 1104 are arranged on both sides of the upper connecting member 1102, and the size of the bar buckle 1103 is adapted to the size of the bar slot 1104.

[0039] In one embodiment of the present invention, when the transmission connection between shaft one 802 and shaft two 803 is disconnected, the bar buckle 1103 is twisted to keep the bar buckle 1103 and the bar slot 1104 horizontally overlapped. At this time, the lower connecting member 1101 and the upper connecting member 1102 are disconnected, thereby achieving the disconnection of the transmission connection between shaft one 802 and shaft two 803.

[0040] Furthermore, each of the four guide rods 810 is slidably connected to a connecting arm 13, one end of which is movably overlapped on the sliding sleeve 1003, one end of which is fixedly connected to a spring 1301, and the other end of the spring 1301 is connected to a limiting rod 1302, which is "L" shaped.

[0041] Furthermore, the limiting rod 1302 on any one of the connecting arms 13 is movably connected to the limiting rod 1302 on the opposite side, the injection tube 12 is arranged between the two connected and fixed limiting rods 1302, a cylindrical protrusion 1303 is arranged at one end of the limiting rod 1302, a hole groove 1304 is arranged on one side of the limiting rod 1302, and a rubber pad 1305 is installed on the inner wall of the limiting rod 1302.

[0042] In one embodiment of the present invention, after the injection tube 12 is stretched, in order to better keep the injection tube 12 stable during injection, the connecting arms 13 are fixedly connected in pairs according to the size of the injection tube 12, and the injection tube 12 is located between the connecting arms 13. While the adjustment plate 10 drives the clamping block 807 at the upper end to move upward to straighten the injection tube 12, the connecting arms 13 also move upward under the influence of the upward movement of the sliding sleeve 1003, thereby achieving the effect of auxiliary stretching and better fixing the injection tube 12.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A flow meter measurement accuracy detection device, comprising a workbench (1), a control cabinet (2), a drainage box (3), a test box (4), an electric cylinder (5), an electronic scale (6), and a liquid injection pipe (12), characterized in that: The workbench (1) is installed with a control cabinet (2), a drainage box (3) and an electronic scale (6) arranged in sequence, the electric cylinder (5) is installed on the inner wall of the drainage box (3), the electric cylinder (5) is connected to the test box (4) by driving, and the test box (4) is arranged inside the drainage box (3), a sliding rod (301) is fixedly connected to the inner wall of the drainage box (3), and the test box (4) is slidably connected to the sliding rod (301), and a mounting frame (7) is also fixedly installed on the workbench (1), the mounting frame (7) is arranged above the drainage box (3), and the mounting frame (7) is in the shape of an "I", and mounting plates (1) and (2) (9) are fixedly connected to the inner walls of the mounting frame (7), and an adjusting plate (10) is slidably connected to the inner side of the mounting plate (8); A motor 1 (801) is fixedly mounted on the outer side of one of the mounting plates 1 (8); the motor 1 (801) is drivingly connected to a rotating shaft 1 (802); a detachable connecting component (11) is mounted on the top of the rotating shaft 1 (802); and the rotating shaft 1 (802) is connected to a rotating shaft 2 (803) via the detachable connecting component (11); a bevel gear 1 (804) is mounted on the ends of the rotating shaft 1 (802) and the rotating shaft 2 (803) that are away from each other; and the bevel gear 1 (804) is meshingly connected to a bevel gear 1 (804). bevel gear 2 (805), a roller is mounted on the bevel gear 2 (805), the roller passes through the mounting plate 1 (8), threads (806) are arranged at both ends of the roller, and the threads (806) at both ends are screwed in opposite directions, a clamping block (807) is threadedly mounted on the threads (806), a sliding rod 2 (808) is connected between the two mounting plates 1 (8), the bottom of the clamping block (807) is slidably mounted on the sliding rod 2 (808), and the clamping block (807) is used to clamp and fix the injection tube (12); A second motor (1001) is fixedly mounted on one of the adjustment plates (10), the second motor (1001) is drivingly connected to a gear (1002), a rack (901) is fixedly mounted on the inner side of the second mounting plate (9), the gear (1002) meshes with the rack (901), an empty slot (902) is provided in the middle of the second mounting plate (9), and a transmission shaft connecting the gear (1002) and the second motor (1001) is slidably connected to the empty slot (902).

2. The flow meter measurement accuracy detection device according to claim 1 is characterized in that: A groove (809) is provided on the inner side of the clamping block (807).

3. The flow meter measurement accuracy detection device according to claim 1 is characterized in that: Two guide rods (810) are fixedly mounted on both left and right sides of the mounting plate 1 (8), and a sliding sleeve (1003) is mounted in an array on the inner wall of the adjustment plate (10), and the sliding sleeve (1003) is movably mounted on the outside of the guide rod (810).

4. The flow meter measurement accuracy detection device according to claim 1 is characterized in that: A slide groove (903) is provided on one side of the second mounting plate (9) close to the adjustment plate (10), and a slide bar is provided on one side of the adjustment plate (10) close to the second mounting plate (9), and the slide bar is slidably connected inside the slide groove (903).

5. The flow meter measurement accuracy detection device according to claim 1 is characterized in that: The detachable connection assembly (11) comprises a lower connection member (1101) and an upper connection member (1102); the bottom of the lower connection member (1101) is connected to a first rotating shaft (802); the top of the upper connection member (1102) is connected to a second rotating shaft (803); a bar buckle (1103) is movably mounted on the bottom of the lower connection member (1101); one end of the bar buckle (1103) passes through the upper connection member (1102); bar slots (1104) are arranged on both sides of the upper connection member (1102); the bar buckle (1103) and the bar slots (1104) are adapted in size.

6. The flow meter measurement accuracy detection device according to claim 3 is characterized in that: The four guide rods (810) are all slidably connected to a connecting arm (13), one end of the connecting arm (13) is movably overlapped on the sliding sleeve (1003), one end of the connecting arm (13) is fixedly connected to a spring (1301), the other end of the spring (1301) is connected to a limiting rod (1302), and the limiting rod (1302) is "L" shaped.

7. The flow meter measurement accuracy detection device according to claim 6, characterized in that: The limiting rod (1302) on any one of the connecting arms (13) is movably connected to the limiting rod (1302) on the opposite side, and the injection tube (12) is arranged between the two fixedly connected limiting rods (1302).

8. The flow meter measurement accuracy detection device according to claim 6, characterized in that: A columnar protrusion (1303) is provided at one end of the limiting rod (1302), a hole groove (1304) is provided at one side of the limiting rod (1302), and a rubber pad (1305) is installed on the inner wall of the limiting rod (1302).

9. The flow meter measurement accuracy detection device according to claim 1, characterized in that: The top of the injection pipe (12) is connected to a flow meter detection port, and the bottom of the injection pipe (12) is arranged above the drainage box (3).

10. The flow meter measurement accuracy detection device according to claim 1, characterized in that: The connection between the electric cylinder (5) and the test box (4) is a detachable connection, and the electric cylinder (5) is communicatively connected to the control cabinet (2).

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