Flowmeter accuracy testing device

Abstract

The present application relates to the field of instrument detection tools, particularly relates to a flow meter measurement precision detection device, including a workbench, a control cabinet, a drainage tank, a test box, an electric cylinder, an electronic scale and a liquid injection pipe etc. The control cabinet, the drainage tank and the electronic scale are sequentially installed on the workbench, the electric cylinder drives the test box to slide in the drainage tank, the mounting frame is provided with mounting plate one, mounting plate two and an adjusting plate, the liquid injection pipe is fixed by cooperation of the motor one, the rotating shaft, the bevel gear and the clamp block, and the motor two, the gear and the rack can straighten the liquid injection pipe. Its beneficial effects are that the liquid injection pipe can be prevented from being bent, the motor two drives the gear and the rack to mesh transmission, the adjusting plate drives the upper clamp block to move upward to straighten the liquid injection pipe, the inner groove of the clamp block better fixes the liquid injection pipe, the connecting arm, the spring and the limiting rod assist in stretching and stably fixing the liquid injection pipe, the stability of the liquid injection pipe during detection is improved, and finally the accuracy of the flow meter measurement precision detection is improved.

Description

Technical Field

[0001] This invention relates to the field of instrument testing equipment, and in particular to a device for testing the metering accuracy of flow meters. Background Technology

[0002] Flow meters are instruments used to measure the flow rate of fluids. Accurate measurement of fluid flow is crucial in fields such as industrial production, energy management, and environmental monitoring, highlighting the necessity of testing the metering accuracy of flow meters. In industrial production processes, industries like chemicals and pharmaceuticals have extremely high requirements for the accuracy of flow control of various fluids. Taking chemical synthesis reactions as an example, inaccurate flow ratios of raw materials can lead to incomplete reactions, reduced product quality, and even potential safety accidents. Current technology involves using an air pump to inject liquid into the test chamber through an injection tube. However, the liquid disperses instantly upon the pump's movement, and the flow velocity decreases due to the instantaneous force. This method lacks sufficient metering accuracy in practice. Furthermore, a bent injection tube can also slow down the flow velocity, resulting in a significant discrepancy between the actual flow rate per unit time and the actual flow rate.

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

[0004] The purpose of this invention is to provide a flow meter measurement accuracy detection device to solve the problems that the flow rate is slowed down due to the bending of the injection pipe and the liquid is scattered due to the air pump pushing the injection pipe, resulting in insufficient accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A flow meter measurement accuracy testing device includes a workbench, a control cabinet, a drainage tank, a test chamber, an electric cylinder, an electronic scale, and a liquid injection pipe. The control cabinet, drainage tank, and electronic scale are arranged in sequence on the workbench. The electric cylinder is installed on the inner wall of the drainage tank and is driven by the test chamber, which is located inside the drainage tank. A sliding rod is fixedly connected to the inner wall of the drainage tank, and the test chamber is slidably connected to the sliding rod. A mounting frame is also fixedly installed on the workbench, located above the drainage tank, and is in the shape of an "I". Mounting plate one and mounting plate two are fixedly connected to both sides of the inner wall of the mounting frame. An adjusting plate is slidably connected to the inner side of mounting plate one. One of the mounting plates is fixedly mounted on the outer side of a motor. The motor drives a rotating shaft. A detachable connecting assembly is mounted on the top of the rotating shaft, and the rotating shaft is connected to a rotating shaft two via the detachable connecting assembly. A bevel gear is mounted on the opposite ends of the rotating shafts one and two. The bevel gear one meshes with the bevel gear two. A roller is mounted on the bevel gear two. The roller passes through the mounting plate one. Both ends of the roller are threaded, and the threads at both ends are screwed in opposite directions. A clamping block is threaded onto the threads. A sliding rod two is connected between the two mounting plates one. The bottom of the clamping block is slidably mounted on the sliding rod two. The clamping block is used to clamp and fix the injection tube. One of the adjustment plates is fixedly mounted with a second motor, which drives a gear. A rack is fixedly mounted on the inner side of the second mounting plate, and the gear meshes with the rack. A slot is provided in the middle of the second mounting plate, and the transmission shaft connecting the gear and the second motor is slidably connected to the slot.

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

[0007] Preferably, two guide rods are fixedly installed on both the left and right sides of the mounting plate, and sliding sleeves are arrayed on the inner wall of the adjusting plate, with the sliding sleeves movably sleeved on the outside of the guide rods.

[0008] Preferably, the mounting plate two is provided with a sliding groove on the side near the adjusting plate, and the adjusting plate is provided with a sliding strip on the side near the mounting plate two, the sliding strip being slidably connected inside the sliding 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 a first rotating shaft, and the top of the upper connecting member is connected to a second rotating shaft. A strip-shaped buckle is movably installed at the bottom of the lower connecting member, and one end of the strip-shaped buckle passes through the upper connecting member. Strip-shaped slots are provided on both sides of the upper connecting member, and the size of the strip-shaped buckle is adapted to the size of the strip-shaped slots.

[0010] Preferably, each of the four guide rods is slidably connected to a connecting arm, one end of which is movably attached to a sliding sleeve, and one end of which is fixedly connected to a spring. The other end of the spring is connected to a limit rod, which is L-shaped.

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

[0012] Preferably, one end of the limiting rod is provided with a cylindrical protrusion, one side of the limiting rod is provided with a groove, 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 the flow meter detection port, and the bottom of the injection pipe is positioned above the drain tank.

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

[0015] The technical effects and advantages of this invention are as follows: 1. The motor drives the gear and rack to mesh and transmit power. The adjusting plate and the mounting plate are slidably connected. The detachable component disconnects the transmission connection between the rotating shaft and the rotating shaft, so that the adjusting plate drives the upper clamping block to move upward, thereby straightening the injection tube and preventing bending.

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

[0017] 3. One end of the connecting arm on each of the four guide rods overlaps the sliding sleeve, and the other end is connected to the spring and the limiting rod. After the injection tube is stretched, the connecting arms are fixed in pairs, and the injection tube is located between them. When the adjusting plate moves the clamping block upward, the connecting arm also moves upward to assist in the stretching. At the same time, the limiting rod and the rubber pad better fix the injection tube, making it stable during injection. Attached Figure Description

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

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

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

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

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

[0023] Figure 6 For the present invention Figure 4 A schematic diagram of the enlarged structure at point B.

[0024] Figure 7 For the present invention Figure 4 A schematic diagram of the enlarged structure at point C.

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

[0026] Figure 9 For the present invention Figure 8 A schematic diagram of the enlarged structure at point D.

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

[0028] Figure 11 For the present invention Figure 10 A schematic diagram of the enlarged structure at point E.

[0029] In the diagram: 1. Workbench; 2. Control cabinet; 3. Drainage tank; 4. Test box; 5. Electric cylinder; 6. Electronic scale; 7. Mounting bracket; 8. Mounting plate one; 801. Motor one; 802. Shaft one; 803. Shaft two; 804. Bevel gear one; 805. Bevel gear two; 806. Thread; 807. Clamping block; 808. Slide rod two; 809. Groove; 810. Guide rod; 9. Mounting plate two; 901. Rack; 902. 10. Empty slot; 11. Slide groove; 12. Adjusting plate; 13. Motor II; 14. Gear; 15. Sliding sleeve; 16. Detachable connecting assembly; 17. Lower connecting piece; 18. Upper connecting piece; 19. Strip buckle; 10. Strip groove; 11. Injection pipe; 12. Connecting arm; 13. Spring; 14. Limiting rod; 15. Columnar protrusion; 16. Hole groove; 17. Rubber pad. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides, for example Figures 1-11 The flow meter measurement accuracy testing device shown includes a workbench 1, a control cabinet 2, a drainage tank 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 tank 3, and the electronic scale 6 are arranged in sequence on the workbench 1. The electric cylinder 5 is installed on the inner wall of the drainage tank 3 and is driven by the test box 4. The test box 4 is located inside the drainage tank 3. A sliding rod 301 is fixedly connected to the inner wall of the drainage tank 3. 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 located above the drainage tank 3 and is in the shape of an "I". Mounting plate 8 and mounting plate 9 are fixedly connected to both sides of the inner wall of the mounting frame 7. An adjusting plate 10 is slidably connected to the inner side of mounting plate 8. A motor 801 is fixedly mounted on the outer side of one of the mounting plates 8. The motor 801 drives and connects to a rotating shaft 802. A detachable connecting component 11 is mounted on the top of the rotating shaft 802. The rotating shaft 802 is connected to a rotating shaft 803 through the detachable connecting component 11. A bevel gear 804 is mounted on the opposite ends of the rotating shafts 802 and 803. The bevel gear 804 meshes with a bevel gear 805. A roller is mounted on the bevel gear 805. 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 threaded onto the threads 806. A sliding rod 808 is connected between the two mounting plates 8. The bottom of the clamping block 807 is slidably mounted on the sliding rod 808. The clamping block 807 is used to clamp and fix the injection tube 12. One of the adjustment plates 10 is fixedly mounted with a motor 1001, which drives a gear 1002. A rack 901 is fixedly mounted on the inner side of the mounting plate 9, and the gear 1002 meshes with the rack 901. A slot 902 is provided in the middle of the mounting plate 9, and the transmission shaft connecting the gear 1002 and the motor 1001 is slidably connected to the 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 positioned above the drain tank 3.

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

[0034] In one embodiment of the present invention, when performing flow meter measurement accuracy testing, the injection pipe 12 is first aligned with the drain tank 3, the top of the injection pipe 12 is connected to the flow meter detection port, the injection pipe 12 is placed between the clamping blocks 807, the motor 801 is started, the motor 801 drives the bevel gear 804 on the rotating shaft 802 to rotate, the bevel gear 804 meshes with the bevel gear 805, and the clamping blocks 807 move closer to each other to clamp the injection pipe 12 under the transmission guidance of the thread 806 and the slide rod 808; when it is necessary to stretch the injection pipe 12 to avoid bending, the motor 1001 drives the gear 1002 to mesh with the rack 901, the adjusting plate 10 is slidably connected to the mounting plate 8, the mounting plate 8 and the mounting plate 9 are fixedly connected to the mounting bracket 7, and the detachable components are used for transmission. 11. Disconnect the transmission connection between the first rotating shaft 802 and the second rotating shaft 803, so that the adjusting plate 10 drives the clamp 807 located 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 starts to inject water into the drain tank 3 through the flow meter detection port. 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 drain port of the injection pipe 12, and the injection pipe 12 starts to inject water into the test box 4. After a period of time, the water injection stops, and the timing stops immediately. After the water inside the injection pipe 12 has drained, the test box 4 is removed and placed on the electronic scale 6 for weighing. After removing the weight of the test box 4 itself, the control cabinet 2 calculates the flow meter measurement accuracy data by combining the water injection time and the liquid weight.

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

[0036] Furthermore, two guide rods 810 are fixedly installed on both the left and right sides of the mounting plate 8, and sliding sleeves 1003 are arrayed on the inner wall of the adjusting plate 10, with the sliding sleeves 1003 movably sleeved on the outside of the guide rods 810.

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

[0038] Furthermore, the detachable connecting assembly 11 includes a lower connecting member 1101 and an upper connecting member 1102. The bottom of the lower connecting member 1101 is connected to a first rotating shaft 802, and the top of the upper connecting member 1102 is connected to a second rotating shaft 803. A strip-shaped buckle 1103 is movably installed at the bottom of the lower connecting member 1101, and one end of the strip-shaped buckle 1103 passes through the upper connecting member 1102. Strip-shaped slots 1104 are provided on both sides of the upper connecting member 1102, and the size of the strip-shaped buckle 1103 is adapted to the size of the strip-shaped slots 1104.

[0039] In one embodiment of the present invention, when disconnecting the transmission connection between the first rotating shaft 802 and the second rotating shaft 803, the strip buckle 1103 is twisted to keep the strip buckle 1103 and the strip groove 1104 horizontally aligned. At this time, the lower connecting member 1101 and the upper connecting member 1102 are disconnected, thereby realizing the disconnection of the transmission connection between the first rotating shaft 802 and the second rotating shaft 803.

[0040] Furthermore, each of the four guide rods 810 is slidably connected to a connecting arm 13. One end of the connecting arm 13 is movably attached to 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 limit 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 fixed limiting rods 1302. One end of the limiting rod 1302 is provided with a cylindrical protrusion 1303, and one side of the limiting rod 1302 is provided with a groove 1304. 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 maintain the stability of the injection tube 12 during injection, the connecting arms 13 are fixedly connected in pairs according to the size of the injection tube 12. The injection tube 12 is located between the connecting arms 13. While the adjusting plate 10 drives the clamping block 807 located 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 assisting stretching and at the same time achieving better fixation of the injection tube 12.

[0043] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A flow meter metering accuracy testing device, comprising a workbench (1), a control cabinet (2), a drainage tank (3), a test chamber (4), an electric cylinder (5), an electronic scale (6), and a liquid injection pipe (12), characterized in that: The control cabinet (2), drainage tank (3) and electronic scale (6) are arranged in sequence on the workbench (1). The electric cylinder (5) is installed on the inner wall of the drainage tank (3). The electric cylinder (5) is connected to the test box (4) and the test box (4) is located inside the drainage tank (3). A slide rod (301) is fixedly connected to the inner wall of the drainage tank (3). The test box (4) is slidably connected to the slide rod (301). A mounting frame (7) is also fixedly installed on the workbench (1). The mounting frame (7) is located above the drainage tank (3) and the mounting frame (7) is in the shape of an "I". Mounting plate (8) and mounting plate (9) are fixedly connected to both sides of the inner wall of the mounting frame (7). An adjusting plate (10) is slidably connected to the inner side of mounting plate (8). One of the mounting plates (8) is fixedly mounted with a motor (801) on its outer side. The motor (801) drives a rotating shaft (802). A detachable connecting assembly (11) is mounted on the top of the rotating shaft (802). The rotating shaft (802) is connected to a rotating shaft (803) via the detachable connecting assembly (11). A bevel gear (804) is mounted on the ends of the rotating shafts (802) and (803) that are far apart from each other. The bevel gear (804) meshes with a conical gear. A bevel gear (805) is provided with a roller, which 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 threaded on the thread (806). A sliding rod (808) is connected between the two mounting plates (8). The bottom of the clamping block (807) is slidably mounted on the sliding rod (808). The clamping block (807) is used to clamp and fix the injection tube (12). One of the adjustment plates (10) is fixedly mounted with a motor (1001), which drives a gear (1002). A rack (901) is fixedly mounted on the inner side of the mounting plate (9). The gear (1002) meshes with the rack (901). A slot (902) is provided in the middle of the mounting plate (9), and the transmission shaft connecting the gear (1002) and the motor (1001) is slidably connected to the slot (902). The inner side of the clamping block (807) is provided with a groove (809). Two guide rods (810) are fixedly installed on both the left and right sides of the mounting plate (8). Sliding sleeves (1003) are arrayed on the inner wall of the adjusting plate (10). The sliding sleeves (1003) are movably sleeved on the outside of the guide rods (810). The detachable connecting assembly (11) includes a lower connector (1101) and an upper connector (1102). The bottom of the lower connector (1101) is connected to a first rotating shaft (802), and the top of the upper connector (1102) is connected to a second rotating shaft (803). A strip buckle (1103) is movably installed at the bottom of the lower connector (1101), and one end of the strip buckle (1103) passes through the upper connector (1102). Strip grooves (1104) are provided on both sides of the upper connector (1102), and the size of the strip buckle (1103) is adapted to the size of the strip grooves (1104). Each of the four guide rods (810) is slidably connected to a connecting arm (13). The first end of the connecting arm (13) is movably attached to the sliding sleeve (1003). The second 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). The limiting rod (1302) is L-shaped.

2. The flow meter metering accuracy detection device according to claim 1, characterized in that: The mounting plate 2 (9) is provided with a sliding groove (903) on the side near the adjusting plate (10), and a sliding bar is provided on the side of the adjusting plate (10) near the mounting plate 2 (9), and the sliding bar is slidably connected inside the sliding groove (903).

3. The flow meter metering accuracy detection device according to claim 1, 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 fixed limiting rods (1302).

4. The flow meter metering accuracy detection device according to claim 1, characterized in that: One end of the limiting rod (1302) is provided with a cylindrical protrusion (1303), one side of the limiting rod (1302) is provided with a groove (1304), and a rubber pad (1305) is installed on the inner wall of the limiting rod (1302).

5. The flow meter metering accuracy detection device according to claim 1, characterized in that: The top of the injection pipe (12) is connected to the flow meter detection port, and the bottom of the injection pipe (12) is located above the drain tank (3).

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

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