A standard table method gas flow standard device

Abstract

The application discloses a standard table method gas flow standard device, which comprises a positioning plate, a rectangular clearance hole is formed in the middle of the positioning plate, one row of air pipes and one row of clamping pipes are arranged on the two sides of the rectangular clearance hole, one row of the air pipes and one row of the clamping pipes are opposite to each other, and the air pipes and the clamping pipes opposite to each other are coaxial, the inner diameters of one row of the air pipes are different, and the air pipes and the positioning plate are fixedly connected. In the application, the positioning plate, the supporting plate, the sliding seat, the upper and lower sliding rods, the supporting plate and the table support are arranged, so that each to-be-measured instrument can be moved to the corresponding air pipe and clamping pipe by the sliding seat and the upper and lower sliding rods, manual carrying and lifting are not needed, the driving mechanism and the transmission component are arranged, so that the to-be-measured instrument can be clamped on the air pipe by the clamping pipe when the to-be-measured instrument is lifted to the docking position, manual locking treatment is not needed, the working amount of manual participation is greatly reduced in the installation mode of the to-be-measured instrument, and the installation efficiency of the to-be-measured instrument is improved.

Description

Technical Field

[0001] This invention relates to the field of instrument calibration technology, and in particular to a standard gas flow standard device. Background Technology

[0002] In order to use gases scientifically, save energy, improve the efficiency of gas flow meter verification and calibration, and expand the range of flow verification and calibration, it is necessary to accurately measure gas flow. Gas flow standard devices are metrological standards established for verifying gas flow meters (such as gas flow meters). Their purpose is to ensure the accuracy of gas flow meter measurement and to carry out flow value transfer.

[0003] Most flow meter characteristic tests are performed on standard flow calibration platforms. However, these platforms can only calibrate and verify flow meters / gauges of the same specification in a single test. Calibrating and verifying flow meters / gauges of different specifications requires dismantling the corresponding piping, increasing the difficulty and reducing efficiency. Furthermore, the flow meters / gauges under test are heavy and typically have flanges at both ends, requiring manual lifting and connection to the testing piping during installation, which is quite laborious.

[0004] Therefore, there is an urgent need in the market for a flow standard device that can simultaneously test the air flow of multiple specifications of flow meters / gauges under test, and also makes the installation and disassembly of the flow meters / gauges under test labor-saving, convenient and efficient. Summary of the Invention

[0005] The purpose of this invention is to provide a standard gas flow rate standard device in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A standard gas flow meter device includes a positioning plate with a rectangular clearance hole in the center. A row of vent pipes and a row of clamping pipes are respectively arranged on both sides of the rectangular clearance hole. The vent pipes and clamping pipes are aligned and coaxial. The vent pipes have different inner diameters. The vent pipes are fixedly connected to the positioning plate, and the clamping pipes are slidably connected to the positioning plate. A support plate is fixedly arranged below the positioning plate. A transverse slide block is slidably connected to the support plate below the rectangular clearance hole. An upper and lower sliding rod are connected to the transverse slide block. A meter support is fixedly connected to the top of the upper and lower sliding rods above the transverse slide block. A support plate is fixedly connected to the bottom of the upper and lower sliding rods below the transverse slide block. A drive mechanism for controlling the up and down movement of the support plate is arranged below the positioning plate. A slider is connected to the bottom of the support plate, and a push plate is fixedly connected to one end of the slider. A transmission component is arranged below the clamping pipes, and the push plate can control the individual movement of each clamping pipe through the transmission component.

[0007] As a further description of the above technical solution: The support plate has a slide rail in the middle, the transverse slide block is located in the slide rail, and a lead screw is rotatably connected in the slide rail. The lead screw and the transverse slide block are connected by a through screw.

[0008] As a further description of the above technical solution: The number of upper and lower sliding rods is two, and the bottom ends of the two upper and lower sliding rods are fixedly connected to the top wall of the support plate. The two upper and lower sliding rods are set through the transverse sliding block and are slidably connected. The table support is a plate-shaped structure, and the top wall of the table support has a V-shaped groove.

[0009] As a further description of the above technical solution: The driving mechanism includes a drive shaft and an electric push rod. The bottom wall of the slider is fixedly connected to a connecting sleeve via a connecting plate. A rotating sleeve is fitted inside the connecting sleeve. The rotating sleeve is fitted outside the drive shaft and the two are slidably connected. The two ends of the drive shaft are hinged to the bottom wall of the support plate via an arm and one side of the arm. One side of the arm is hinged to the bottom of the support plate via an electric push rod.

[0010] As a further description of the above technical solution: The top wall of the positioning plate is fixedly connected to a guide seat, and the middle part of the guide seat is fixedly connected to a guide sleeve that is sleeved on the outside of the clamp tube. The guide sleeve and the clamp tube are slidably connected.

[0011] As a further description of the above technical solution: The transmission component includes a vertical plate and a horizontal plate. A cantilever located below the clamping tube is connected to one side of the support plate. One end of the cantilever is slidably connected to the vertical plate. A grooved plate is provided below the clamping tube. A limiting shaft is fixedly connected inside the grooved plate. A seat plate connected to the grooved plate is fixedly connected to the bottom wall of the clamping tube. An oblong inclined hole is provided on the vertical plate near the top and fitted outside the limiting shaft. The horizontal plate is slidably connected to the bottom of the support plate, and a wedge plate located below the vertical plate is fixedly connected to one end of the horizontal plate. A vertical plate is fixedly connected to the other end of the horizontal plate. A pad is provided on one side of the vertical plate. An electromagnet is embedded in the pad. A magnetic suction plate is fixedly connected to one end of the push plate.

[0012] As a further description of the above technical solution: A guide rod is fixedly connected to one side of the grooved plate, passing through the base plate. The guide rod is slidably connected to the base plate. An adjusting shaft is screwed through one side of the base plate. One end of the adjusting shaft is rotatably connected to one side of the grooved plate. An adjusting shaft is screwed through one side of the upright plate. One end of the adjusting shaft is rotatably connected to the back of the pad. The back of the pad is slidably connected to the upright plate via the guide rod.

[0013] As a further description of the above technical solution: The top of the push plate is provided with a positioning groove, a sliding plate is provided in the positioning groove, a second roller is provided at the bottom of the sliding plate, and a pressure sensor located on one side of the positioning groove is fixedly installed in the positioning groove.

[0014] As a further description of the above technical solution: The vent pipe and clamp pipe, which are coaxially distributed, are respectively connected to baffles at their opposite ends, and a sealing gasket is adhered to the front side of the baffle.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by setting a positioning plate, a support plate, a slide block, upper and lower sliding bars, a tray, and a support, each instrument under test can be transferred by the slide block and upper and lower sliding bars to the corresponding vent pipe and clamp pipe, eliminating the need for manual handling and lifting. By setting a drive mechanism and transmission components, the instrument under test can be clamped onto the vent pipe by the clamp pipe when it is lifted to the docking position, eliminating the need for manual locking. This method of installing the instrument under test greatly reduces the amount of manual work and improves the efficiency of instrument installation.

[0016] 2. In this invention, by setting up an adjustment shaft one, an adjustment shaft two, a horizontal plate, a vertical plate, a seat plate and a pad, the axial position of the clamping tubes with different inner diameters can be adjusted, which facilitates the clamping and ventilation testing of instruments of different lengths. In other words, the position of the clamping tube after clamping the instrument can be adjusted according to the actual length of the instrument. This setting enables the device to perform testing and processing on instruments of various specifications.

[0017] 3. In this invention, by setting up a transmission shaft, connecting sleeve, rotating sleeve and upper and lower sliding bars, the sliding function of the left and right slide blocks, combined with the swing function of the transmission shaft, enables the left and right slide blocks and upper and lower sliding bars to drive various specifications of instruments under test without interference and connect different vent pipes and clamps without interference. This setting enables the device to simultaneously perform venting tests on multiple instruments under test of different specifications.

[0018] 4. In this invention, by setting a positioning groove, a sliding plate, rollers, and a pressure sensor, various specifications of measuring instruments to be measured can be intelligently and reliably clamped between the corresponding air pipe and clamping pipe, which can effectively prevent air leakage and ensure detection accuracy.

[0019] 5. In this invention, the transmission components also have a self-locking function. After the transverse slide moves the slider, the support plate and the push plate synchronously, under the drive of a set of drive mechanisms, multiple instruments under test with different inner diameters can be installed on the device between the corresponding clamps and vent pipes through the various transmission components. This arrangement makes the control structure of the device for installing instruments under test of various specifications simpler, and the design is ingenious, greatly reducing the manufacturing cost. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a standard meter method gas flow standard device proposed in this invention; Figure 2 for Figure 1 A magnified view of the "a" in the middle; Figure 3 for Figure 1 A schematic diagram of the bottom structure; Figure 4 for Figure 3 A magnified view of the "c" in the middle; Figure 5 for Figure 1 A magnified view of the "b" in the middle; Figure 6 for Figure 5 The diagram below; Figure 7 A pressure sensor, slide plate, and push plate are used in a standard meter gas flow standard device.

[0021] Legend: 1. Positioning plate; 11. Rectangular clearance hole; 2. Vent pipe; 3. Clamping pipe; 31. Seat plate; 4. Horizontal slide; 5. Upper and lower sliding bars; 6. Support; 61. V-groove; 7. Transmission components; 71. Vertical plate; 711. Waist-shaped inclined hole; 72. Horizontal plate; 721. Wedge plate; 722. Vertical plate; 7221. Pad plate; 72211. Electromagnet; 72212. Guide rod two; 8. Drive mechanism; 81. Drive shaft; 811. Arm; 82. Electric push rod; 101. Support plate; 102. Slider; 102 1. Connecting sleeve; 10211. Rotating sleeve; 103. Push plate; 1031. Magnetic suction plate; 1032. Positioning groove; 10321. Slide plate; 103211. Roller II; 104. Lead screw; 105. Support plate; 1051. Slide rail; 106. Guide seat; 1061. Guide sleeve; 107. Cantilever; 108. Channel plate; 1081. Guide rod I; 109. Limiting shaft; 110. Adjusting shaft I; 120. Adjusting shaft II; 130. Baffle; 1301. Sealing gasket; 140. Pressure sensor. Detailed Implementation

[0022] 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. Example 1

[0023] Please see Figure 1-7 This invention relates to a standard gas flow metering device. This device is used to verify the standardization of a gas flow meter. Currently, gas flow meters are typically connected in series in gas transmission pipelines. The gas flow meter incorporates a smart sensor and a microprocessor. The smart sensor acquires gas flow data passing through the meter's inner orifice, and the microprocessor analyzes and processes this data to obtain an accurate gas flow value. Because gas flow meters may experience "drift" due to aging, wear, or environmental influences after prolonged use, leading to inaccurate readings, regular standardization testing is necessary. Currently, the common method for testing gas flow meters is to connect a standard meter and the meter under test in series in the gas pipeline. By comparing the flow values ​​measured by the two, the standardization of the meter under test is determined, and the calibration of the meter under test is then determined based on the test results.

[0024] This device includes a positioning plate 1. A rectangular clearance hole 11 is provided in the center of the positioning plate 1. A row of vent pipes 2 and a row of clamp pipes 3 are respectively arranged on both sides of the rectangular clearance hole 11. The row of vent pipes 2 and the row of clamp pipes 3 are opposite each other and coaxial. The inner diameters of the row of vent pipes 2 are different. The other end of the row of vent pipes 2 is fixedly connected to a main pipe. The main pipe is connected to an air supply source, which includes an air tank, a compressor pump, and a flow regulating valve. The air supply source provides air to the main pipe. In this embodiment, an airflow at a certain pressure is introduced. The inner diameter of the row of vent pipes 2 gradually increases along the length of the positioning plate 1. The inner diameters of the vent pipes 2 and the corresponding clamp pipes 3 are the same. The vent pipes 2 and the positioning plate 1 are fixedly connected, while the clamp pipes 3 and the positioning plate 1 are slidably connected. Specifically, a guide seat 106 is fixedly connected to the top wall of the positioning plate 1, and a guide sleeve 1061, which is fitted onto the outside of the clamp pipes 3, is fixedly connected to the middle of the guide seat 106. The guide sleeve 1061 and the clamp pipes 3 are slidably connected. The space between the clamp pipes 3 and the corresponding vent pipes 2 is the space for installing the instrument under test. Specifically, the instrument under test is placed in the aforementioned space, and then the clamp pipes 3 are moved a certain distance towards the vent pipes 2, at which point the instrument under test is clamped. The clamped instrument under test is connected to the vent pipes 2 and the clamp pipes 3. The gas used for flow detection is contained in vent pipe 2, and a standard meter is connected in series with vent pipe 2. During monitoring, the gas in vent pipe 2 flows through the standard meter and then into the instrument under test, and then exits through clamp pipe 3. At this time, the standard meter detects the actual flow rate value, and the instrument under test displays the flow rate value. Then, the flow rate is compared, and the result determines whether the instrument under test needs to be calibrated. An expansion cylinder is installed at the outlet end of clamp pipe 3 to buffer the airflow impact and improve the stability of flow monitoring.

[0025] A support plate 105 is fixedly installed below the positioning plate 1. A transverse slide 4 is slidably connected to the support plate 105 below the rectangular clearance hole 11. The transverse slide 4 can move horizontally below the rectangular clearance hole 11. In specific implementation, a slide rail 1051 is opened in the middle of the support plate 105. The transverse slide 4 is located in the slide rail 1051 and is slidably connected to the slide rail 1051. A lead screw 104 is rotatably connected inside the slide rail 1051. The lead screw 104 and the transverse slide 4 are screwed together. When the lead screw 104 rotates, it can drive the transverse slide 4 to move inside the slide rail 1051. In use, a servo motor is fixedly installed at one end of the support plate 105. The output shaft of the servo motor is fixedly connected to one end of the lead screw 104. The servo motor provides driving force to the rotation of the lead screw 104. The transverse slide block 4 is connected to two upper and lower sliding rods 5, which are slidably connected to the transverse slide block 4. Specifically, there are two upper and lower sliding rods 5, and the bottom ends of the two upper and lower sliding rods 5 are fixedly connected to the top wall of the support plate 101. The two upper and lower sliding rods 5 are flat plates that pass through the top of the transverse slide block 4 and are slidably connected. The top of the upper and lower sliding rods 5 is fixedly connected to a gauge support 6 located above the transverse slide block 4. The function of the gauge support 6 is to support the instrument under test. The gauge support 6 is a plate-shaped structure, and the top wall of the gauge support 6 has a V-shaped groove 61. The gauge support 6 limits the placement of the instrument under test through the V-shaped groove 61. When the transverse slide block 4 moves horizontally, it can move the instrument under test horizontally to the space below the matching vent pipe 2 and clamp pipe 3. When the upper and lower sliding rods 5 rise, they can lift the instrument under test to the position between the vent pipe 2 and clamp pipe 3 through the gauge support 6.

[0026] Among them, the opposite ends of the coaxially distributed vent pipe 2 and clamp pipe 3 are respectively connected to baffle 130. The baffle 130 is a flange structure. A sealing gasket 1301 is bonded to the front side of the baffle 130. The sealing gasket 1301 has a certain thickness. When the coaxially distributed vent pipe 2 and clamp pipe 3 move in opposite directions, the corresponding instrument under test can be reliably clamped through the sealing gasket 1301.

[0027] The bottom of the upper and lower sliding bar 5 is fixedly connected to a support plate 101 located below the transverse slide block 4. When the support plate 101 moves up and down, it can drive the upper and lower sliding bar 5 to move up and down. A drive mechanism 8 for controlling the up and down movement of the support plate 101 is provided below the positioning plate 1. A slider 102 is connected to the bottom of the support plate 101. A push plate 103 is fixedly connected to one end of the slider 102. A transmission component 7 is provided below the clamp tube 3. One clamp tube 3 corresponds to one transmission component 7. When the transverse slide block 4 moves, it can drive the push plate 103 on it to move to one side of the transmission component 7. The push plate 103 can control each clamp tube 3 to move individually through the transmission component 7. Specifically, when the push plate 103 applies a pushing force to the transmission component 7, the transmission component 7 will push the corresponding clamp tube 3 to move towards the coaxial vent pipe 2.

[0028] The drive mechanism 8 includes a drive shaft 81 and an electric push rod 82. The bottom wall of the slider 102 is fixedly connected to a connecting sleeve 1021 via a connecting plate. A rotating sleeve 10211 is fitted inside the connecting sleeve 1021. The rotating sleeve 10211 is fitted outside the drive shaft 81 and the two are slidably connected. The two ends of the drive shaft 81 are hinged to the bottom wall of the support plate 105 via an arm 811 and one side. One side of the arm 811 is hinged to the bottom of the support plate 105 via the electric push rod 82. When the electric push rod 82 moves, it can drive the drive shaft 81 to swing through the arm 811. When the drive shaft 81 swings, it will move through the slider 102. When the slider 102 moves, it will indirectly push the support plate 101 to move up and down, and at the same time, it can also drive the push plate 103 to move.

[0029] The transmission component 7 includes a vertical plate 71 and a horizontal plate 72. A cantilever 107 located below the clamping tube 3 is connected to one side of the support plate 105. One end of the cantilever 107 is slidably connected to the vertical plate 71. In a specific implementation, a vertical sleeve is welded to one end of the cantilever 107 and fitted onto the outside of the vertical plate 71. The vertical sleeve and the vertical plate 71 are slidably connected vertically. A grooved plate 108 is provided below the clamping tube 3. A limiting shaft 109 is fixedly connected inside the grooved plate 108. A seat plate 31 connected to the grooved plate 108 is fixedly connected to the bottom wall of the clamping tube 3. An oblong inclined hole 711 is provided on the vertical plate 71 near the top and fitted onto the outside of the limiting shaft 109. When the vertical plate 71 moves up and down, it pushes the limiting shaft 109 to move laterally through the oblong inclined hole 711. When the limiting shaft 109 moves laterally, it can push the corresponding clamping tube 3 to move. The horizontal plate 72 is slidably connected to the bottom of the support plate 105 and one end is fixedly connected to a vertical sleeve located below the clamping tube 3. Below the vertical plate 71 is a wedge-shaped plate 721, with its inclined surface facing upwards. Specifically, the bottom wall of the support plate 105 is fixedly connected to a horizontal sleeve that covers the outside of the horizontal plate 72. The horizontal sleeve and the horizontal plate 72 are slidably connected. The other end of the horizontal plate 72 is fixedly connected to a vertical plate 722. A pad 7221 is provided on one side of the vertical plate 722, and an electromagnet 72211 is embedded in the pad 7221. One end of the push plate 103 is fixedly connected to a magnetic suction plate. 1031. When the push plate 103 contacts the pad 7221 and continues to apply a pushing force to the pad 7221, the horizontal plate 72 will move laterally. In specific implementation, a second roller 103211 is provided on one side of the push plate 103. When the second roller 103211 abuts against the front side of the pad 7221, the magnetic plate 1031 and the front surface wall of the pad 7221 are approximately in contact. The electromagnet 72211 is electrically connected to the controller (PLC) through wires. When the horizontal plate 72 moves, it will push the vertical plate 71 up and down through the inclined surface on the wedge plate 721. The bottom end of the vertical plate 71 is provided with a first roller. The inclined surface on the wedge plate 721 abuts against the first roller, thereby reducing friction. It should be noted that a resistance-increasing groove is opened on the upper wall of the wedge plate 721 near the inclined surface. The resistance-increasing groove is used to prevent the first roller from rolling freely.

[0030] Furthermore, a guide rod 1081 is fixedly connected to one side of the slotted plate 108, penetrating the base plate 31. The guide rod 1081 and the base plate 31 are slidably connected. An adjusting shaft 110 is screwed through one side of the base plate 31. One end of the adjusting shaft 110 is rotatably connected to one side of the slotted plate 108. When the adjusting shaft 110 rotates, it can adjust the distance between the slotted plate 108 and the base plate 31. An adjusting shaft 120 is screwed through one side of the upright plate 722. One end of the adjusting shaft 120 is rotatably connected to the back of the pad 7221. The back of the pad 7221 is slidably connected to the upright plate 722 via a guide rod 72212. When the adjusting shaft 120 rotates, it can adjust the distance between the pad 7221 and the upright plate 722. The adjustable position structure of the slotted plate 108 and the pad 7221 allows different clamping tubes 3 to reliably clamp instruments of different lengths. Specifically, the lengths of instruments under test vary depending on their inner diameter, and the initial positions of the clamping tubes 3 used to clamp instruments of different specifications are also different. Therefore, during debugging, by rotating the adjusting shaft 110 and the adjusting shaft 2120, the corresponding horizontal plate 72 can be moved laterally and the corresponding clamping tube 3 can be pushed by the vertical plate 71 to reliably clamp the corresponding instrument under test.

[0031] In this embodiment, a positioning groove 1032 is provided on the top of the push plate 103, and a sliding plate 10321 is provided in the positioning groove 1032. A roller 103211 is provided at the bottom of the sliding plate 10321. A pressure sensor 140 is fixedly installed in the positioning groove 1032 on one side. When the roller 103211 is squeezed, it will drive the sliding plate 10321 to move slightly in the positioning groove 1032. When the sliding plate 10321 moves slightly, it will squeeze the pressure sensor 140. The pressure sensor 140 is electrically connected to the controller (PLC). The setting of the pressure sensor 140 can determine whether the corresponding vent pipe 2 and clamp pipe 3 can reliably clamp the instrument under test of the corresponding specification based on the pressure value it receives, so as to avoid leakage.

[0032] Before use, a PLC and an operating box are provided for this device. The controller is installed in the operating box and is electrically connected to the electric push rod 82, the servo motor and the electromagnet 72211. The controller has a built-in program for installing and removing the instrument under test. A row of operating buttons is set on the outer wall of the operating box. The operating buttons are electrically connected to the controller. Each operating button corresponds to one instrument under test.

[0033] Working principle: In the initial state, with the transverse slide 4 near the end of the support plate 105, a test instrument of a certain specification is placed on the instrument support 6. Then, the button corresponding to the test instrument is pressed, and the servo motor drives the lead screw 104 to rotate. When the lead screw 104 rotates, it moves the transverse slide 4 and moves the test instrument to the space below the space between two opposing vent pipes 2 and clamp pipes 3. Then, the controller controls the electric push rod 82. When the electric push rod 82 moves, it drives the transmission shaft 81 to swing upward through the arm 811. When the transmission shaft 81 swings upward, it drives the slider 102 to slide in the groove opened at the bottom of the support plate 101. When the slider 102 moves, it drives the support plate 101 to rise. The upper and lower sliding bars 5 drive the test instrument to rise to the vent position through the instrument support 6. The position between tube 2 and clamp tube 3, wherein during the upward movement of the support 6, the slider 102 drives the push plate 103 to move and push the pad 7221. The pad 7221 pushes the horizontal plate 72 to move laterally. When the horizontal plate 72 moves laterally, the wedge plate 721 uses its inclined surface to push the vertical plate 71 to move upward. When the vertical plate 71 moves upward, it uses the waist-shaped inclined hole 711 to push the limiting shaft 109, thereby driving the clamp tube 3 to move towards the vent tube 2, completing the alignment and clamping of the instrument under test between the two. During clamping, the roller at the bottom of the vertical plate 71 is located in the resistance-increasing groove (arc-shaped groove) near the inclined surface on the upper end face of the wedge plate 721. It should be noted that the alignment and clamping of the instrument under test with the clamp tube 3 and the vent tube 2 are performed synchronously. When the electromagnet 72211 is energized, it generates a magnetic attraction force. When the instrument under test is disassembled after testing, the electromagnet 72211 is energized, and the magnetic suction plate 1031 at one end of the push plate 103 is magnetically attracted by the electromagnet 72211. When the push plate 103 moves in the reverse direction, it will pull the horizontal plate 72 to move laterally through the pad 7221. The clamp tube 3 will move in the reverse direction and release the instrument under test. The instrument under test will be lifted by the instrument support 6. When the horizontal slide 4 is controlled to descend and move laterally, the instrument under test after testing can be moved to the initial loading position.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A standard gas flow rate standard device, comprising a positioning plate (1), characterized in that, The positioning plate (1) has a rectangular clearance hole (11) in the middle. A row of vent pipes (2) and a row of clamp pipes (3) are respectively arranged on both sides of the rectangular clearance hole (11). The row of vent pipes (2) and the row of clamp pipes (3) are opposite each other and are coaxial. The inner diameters of the row of vent pipes (2) are different. The vent pipes (2) are fixedly connected to the positioning plate (1), and the clamp pipes (3) are slidably connected to the positioning plate (1). A support plate (105) is fixedly arranged below the positioning plate (1). A transverse slide (4) is slidably connected to the support plate (105) below the rectangular clearance hole (11). An upper and lower sliding rod (5) is connected to the slide block (4). The top of the upper and lower sliding rod (5) is fixedly connected to a support (6) located above the transverse slide block (4). The bottom of the upper and lower sliding rod (5) is fixedly connected to a support plate (101) located below the transverse slide block (4). A drive mechanism (8) for controlling the up and down movement of the support plate (101) is provided below the positioning plate (1). A slider (102) is connected to the bottom of the support plate (101). A push plate (103) is fixedly connected to one end of the slider (102). A transmission component (7) is provided below the clamp tube (3). The push plate (103) can control the individual movement of each clamp tube (3) through the transmission component (7).

2. The standard meter method gas flow standard device according to claim 1, characterized in that, The support plate (105) has a slide rail (1051) in the middle, and the transverse slide block (4) is located in the slide rail (1051). A lead screw (104) is rotatably connected in the slide rail (1051), and the lead screw (104) and the transverse slide block (4) are connected by a through screw.

3. The standard meter method gas flow standard device according to claim 1, characterized in that, The number of the upper and lower sliding bars (5) is two. The bottom ends of the two upper and lower sliding bars (5) are fixedly connected to the top wall of the support plate (101). The two upper and lower sliding bars (5) are set through the transverse slide block (4) and are slidably connected. The table support (6) is a plate structure. The top wall of the table support (6) is provided with a V-shaped groove (61).

4. The standard meter method gas flow standard device according to claim 1, characterized in that, The drive mechanism (8) includes a drive shaft (81) and an electric push rod (82). The bottom wall of the slider (102) is fixedly connected to a connecting sleeve (1021) via a connecting plate. A rotating sleeve (10211) is fitted inside the connecting sleeve (1021). The rotating sleeve (10211) is fitted outside the drive shaft (81) and the two are slidably connected. The two ends of the drive shaft (81) are hinged to the bottom wall of the support plate (105) via an arm (811) and one side. One side of the arm (811) is hinged to the bottom of the support plate (105) via an electric push rod (82).

5. A standard meter method gas flow standard device according to claim 1, characterized in that, The top wall of the positioning plate (1) is fixedly connected to a guide seat (106), and the middle part of the guide seat (106) is fixedly connected to a guide sleeve (1061) sleeved outside the clamp tube (3). The guide sleeve (1061) and the clamp tube (3) are slidably connected.

6. A standard meter method gas flow standard device according to claim 1, characterized in that, The transmission component (7) includes a vertical plate (71) and a horizontal plate (72). A cantilever (107) located below the clamping tube (3) is connected to one side of the support plate (105). The vertical plate (71) is slidably connected to one end of the cantilever (107). A grooved plate (108) is provided below the clamping tube (3). A limit shaft (109) is fixedly connected inside the grooved plate (108). A seat plate (31) connected to the grooved plate (108) is fixedly connected to the bottom wall of the clamping tube (3). A grooved plate (71) is provided on the vertical plate (71) near the clamping tube (3). The top of the plate has a waist-shaped inclined hole (711) that fits outside the limiting shaft (109). The horizontal plate (72) is slidably connected to the bottom of the support plate (105) and one end of the plate is fixedly connected to a wedge plate (721) located below the vertical plate (71). The other end of the horizontal plate (72) is fixedly connected to a vertical plate (722). A pad (7221) is provided on one side of the vertical plate (722). An electromagnet (72211) is embedded in the pad (7221). One end of the push plate (103) is fixedly connected to a magnetic suction plate (1031).

7. A standard meter method gas flow standard device according to claim 6, characterized in that, A guide rod (1081) is fixedly connected to one side of the groove plate (108) and passes through the seat plate (31). The guide rod (1081) and the seat plate (31) are slidably connected. An adjustment shaft (110) is screwed through one side of the seat plate (31). One end of the adjustment shaft (110) is rotatably connected to one side of the groove plate (108). An adjustment shaft (120) is screwed through one side of the upright plate (722). One end of the adjustment shaft (120) is rotatably connected to the back of the pad (7221). The back of the pad (7221) is slidably connected to the upright plate (722) through the guide rod (72212).

8. A standard meter method gas flow standard device according to claim 6, characterized in that, The top of the push plate (103) is provided with a positioning groove (1032), a sliding plate (10321) is provided in the positioning groove (1032), a roller (103211) is provided at the bottom of the sliding plate (10321), and a pressure sensor (140) located on one side of the positioning groove (1032) is fixedly provided in the positioning groove (1032).

9. A standard meter method gas flow standard device according to claim 1, characterized in that, The vent pipe (2) and clamp pipe (3) are coaxially distributed and connected to baffles (130) at their opposite ends, and a sealing gasket (1301) is bonded to the front side of the baffle (130).

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