Function detection device for production of thermal gas mass flow meter

Abstract

The invention relates to the field of thermal gas mass flow meters, in particular to a function detection device for thermal gas mass flow meter production. Comprising a hot air box assembly, the hot air box assembly is communicated with a detection pipe, the output end of the detection pipe is communicated with a thermal gas mass flow meter, and the outer wall of the detection pipe is sleeved with a compatible clamping assembly; according to the device, a second air pump is started to fill a second inflatable bag structure, so that the second inflatable bag structure is expanded to fill a space between a limiting round shell and a detection pipe, then an equal amount of second electric ball valves are selectively opened, an equal amount of hot air is subjected to function detection after passing through an air conveying pipe, the accurate and controllable effect of detection is improved, and the detection efficiency is improved. And in the subsequent hot air conveying process, the second motor is started to drive the disc body to rotate and convey hot air, the uniform effect of hot air conveying is improved, and the function detection effect of the equipment on hot air with different flow speeds and different masses is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal gas mass flowmeters, and in particular relates to a function detection device for production of thermal gas mass flowmeters. Background Art

[0002] Thermal gas mass flow meter is an instrument that uses the principle of thermal diffusion to measure gas flow. The sensor consists of two reference-level thermal resistors (RTDs).

[0003] After searching, in the prior art, Chinese Patent Publication No.: CN117091679A, Publication Date: 2023-11-21, discloses a gas flow meter calibration device and method, including a workbench, on the top of which a first gas storage tank and a second gas storage tank are fixedly installed, and an upper air cavity and a lower air cavity are provided in the first gas storage tank and the second gas storage tank, and a first connecting component is provided between the two upper air cavities and the two lower air cavities, and the first connecting component includes a gas storage cavity, and the inner walls of the surrounding sides of the two upper air cavities or the two lower air cavities are respectively sealed with an air inlet pipe and an air outlet pipe. The above embodiment does not need to repeatedly inflate the gas storage tank and experiment on the two flow meters separately, which saves a lot of working time and effectively improves work efficiency.

[0004] But the device still has the following defects:

[0005] The inability to control the flow velocity and overall hot gas mass when hot gas enters the thermal gas mass flow meter limits the functional detection, thereby reducing the functional detection effect of the thermal gas mass flow meter. Summary of the invention

[0006] In view of the above problems, the present invention provides a function detection device for production of thermal gas mass flowmeters, comprising a hot air box assembly, the hot air box assembly is connected to a detection tube, the output end of the detection tube is connected to a thermal gas mass flowmeter, a compatible clamping assembly is sleeved on the outer wall of the detection tube, a flow control assembly is installed on the outer wall of the detection tube, and a sealing assembly is installed on the compatible clamping assembly;

[0007] The flow control component includes a second motor and a disc body, a limited circular shell is sleeved on the outer wall of the disc body, a second inflatable bag structure is installed on the limited circular shell, a second air pump is installed on the disc body, and a plurality of groups of air pipes are movably penetrated through the disc body, and a group of second electric ball valves are installed at one end of each group of air pipes. When equal amounts of second electric ball valves are opened, equal amounts of hot air can pass through the air pipes for functional testing.

[0008] Furthermore, the output end of the thermal gas mass flowmeter is connected to a recovery bucket, and the recovery bucket is connected to a temperature measuring component. The hot air box component includes a hot air box body, and a first electric push rod is installed on the top inner wall of the hot air box body. A push plate is installed on the output end of the first electric push rod, and the outer wall of the push plate slides on the inner wall of the hot air box body. A heating plate is installed on the bottom inner wall of the hot air box body, and a first electric ball valve is installed at the junction of the hot air box body and the detection tube.

[0009] Furthermore, the compatible clamping assembly includes a fixed plate, which is provided with a cavity, and the outer wall of the detection tube is slidably fitted on the inner wall of the cavity. Two groups of sliding cavities are symmetrically provided on a side wall of the fixed plate close to the thermal gas mass flowmeter, and a threaded rod is rotatably connected in each group of the sliding cavities. Two groups of first motors are symmetrically installed on the inner walls on both sides of the fixed plate, and the output end of each group of the first motors is transmission-connected to one of the threaded rods. A balancing block is movably sleeved on the outer wall of each group of the threaded rods, and one end of each group of the balancing blocks is installed on the inner wall of the fixed plate.

[0010] Furthermore, each group of the threaded rods is threadedly connected to a group of sliding blocks, each group of the sliding blocks is slidably connected in the sliding cavity, a group of second electric push rods are installed on the side wall of each group of sliding blocks close to the thermal gas mass flowmeter, and a group of fixed blocks are installed on the output end of each group of the second electric push rods.

[0011] Furthermore, two groups of sliding grooves are symmetrically opened on one side wall corresponding to each group of the fixed blocks, a group of mounting plates are slidably connected in each group of the sliding grooves, an elastic limiting plate is connected between the two groups of mounting plates, two groups of mounting blocks are symmetrically installed on one side wall of each group of the fixed blocks close to the sliding grooves, a group of compression springs are installed on one side wall of each group of the mounting blocks, and one end of each group of the compression springs away from the mounting blocks is installed on one of the groups of mounting plates.

[0012] Furthermore, the sealing assembly includes a third electric push rod, one end of which is mounted on a side wall of the fixed plate, a fixing ring is mounted on the output end of the third electric push rod, and a first inflatable bag structure is mounted on the inner wall of the fixing ring.

[0013] Furthermore, a thermal insulation film is installed on the outer wall of the first inflatable bag structure, and the outer wall of the thermal insulation film is slidably fitted on the outer wall of the detection tube. A first air pump is installed on the outer wall of the fixed ring, and the output end of the first air pump passes through the fixed ring and is connected to the input end of the first inflatable bag structure.

[0014] Furthermore, the flow control component also includes a support block, which is installed on the outer wall of the detection tube, a connecting rod is installed on the bottom of the support block, and the end of the connecting rod away from the support block passes through the detection tube and is connected to the connecting block, a first temperature sensor is installed on the outer wall of the connecting rod, and the first temperature sensor is located in the detection tube, the second motor is installed on the bottom of the connecting block, and a fixed column is transmission-connected to the output end of the second motor, the disc body is installed on the end of the fixed column away from the second motor, and the output end of the second air pump passes through the limiting circular shell and is connected to the input end of the second inflatable bag structure.

[0015] Furthermore, the temperature measuring component includes a connecting pipe, one end of which is connected to the outer wall of the recovery barrel, and one end of which is away from the recovery barrel is connected to the heat collecting pipe.

[0016] Furthermore, a third electric ball valve is installed at the junction of the connecting pipe and the heat collecting pipe, a vacuum pump is installed on the outer wall of the heat collecting pipe, and a second temperature sensor is installed on the outer wall of the heat collecting pipe.

[0017] The beneficial effects of the present invention are:

[0018] 1. Start the second air pump to fill the second inflatable bag structure, so that the second inflatable bag structure expands and fills the space between the limiting circular shell and the detection tube, and then selectively open the second electric ball valve of equal amount, so that equal amount of hot air passes through the air pipe for functional detection, which improves the precise and controllable effect of the detection, and in the subsequent hot air delivery process, start the second motor to drive the disc body to rotate and transport hot air, which improves the uniformity of hot air delivery and improves the functional detection effect of the equipment under different flow rates and different qualities of hot air.

[0019] 2. Start the two sets of second electric push rods to drive the two sets of elastic limit plates to move to the two ends of the thermal gas mass flowmeter input end, then start the first motor to drive the two sets of fixed blocks to limit the thermal gas mass flowmeter, and then start to squeeze the two sets of elastic limit plates when they come into contact with the thermal gas mass flowmeter, causing them to bend and deform, and during the bending process, the two sets of mounting plates will be driven to slide in the slide groove, and during the sliding process, the two sets of mounting plates will be driven to pull the compression springs, thereby improving the limiting stability effect while reducing the limitations of the shape of the inlet end of the thermal gas mass flowmeter.

[0020] 3. Start the third electric push rod to push the fixed ring toward the junction of the detection tube and the thermal gas mass flowmeter, and then start the first air pump to inflate the first air bag structure, so that the first air bag structure can be expanded to seal the junction and limit it, so as to prevent the subsequent leakage of the junction from causing unstable air pressure and reducing the detection accuracy. In addition, since the outer wall of the first air bag structure is provided with a heat insulation film, the first air bag structure will not be damaged by the heat released by the detection tube, thereby extending the service life of the equipment, improving the sealing effect of the device and improving the service life of the device.

[0021] 4. When the hot air passes through the thermal gas mass flow meter and enters the recovery barrel, start the vacuum pump and open the third electric ball valve at the same time, so that the hot gas after the detection passes through the connecting pipe and enters the collector tube. The temperature is detected by the second temperature sensor to determine whether the hot gas temperature after the detection is within the specified functional value of the thermal gas mass flow meter, thereby improving the temperature detection effect and the diversity of functional detection.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a function detection device according to an embodiment of the present invention is shown;

[0025] Figure 2 A schematic structural diagram of a thermal gas mass flowmeter according to an embodiment of the present invention is shown;

[0026] Figure 3 A schematic cross-sectional view of a hot air box assembly according to an embodiment of the present invention is shown;

[0027] Figure 4 A schematic diagram of the structure of a compatible clamping assembly according to an embodiment of the present invention is shown;

[0028] Figure 5 A schematic cross-sectional view of a fixing plate according to an embodiment of the present invention is shown;

[0029] Figure 6A schematic diagram of the structure of an elastic limiting plate according to an embodiment of the present invention is shown;

[0030] Figure 7 A schematic structural diagram of a sealing assembly according to an embodiment of the present invention is shown;

[0031] Figure 8 A schematic diagram of the structure of a flow control component according to an embodiment of the present invention is shown;

[0032] Fig. 9 A schematic diagram of the structure of a temperature measurement component according to an embodiment of the present invention is shown.

[0033] In the figure: 1. hot air box assembly; 101. hot air box body; 102. first electric push rod; 103. push plate; 104. heating plate; 105. first electric ball valve; 2. detection tube; 3. thermal gas mass flow meter; 4. recovery barrel; 5. compatible clamping assembly; 501. fixed plate; 502. threaded rod; 503. sliding cavity; 504. sliding block; 505. first motor; 506. balancing block; 507. second electric push rod; 508. fixed block; 509. slide groove; 510. mounting plate; 511. elastic limit plate; 512. mounting block; 513. compression spring; 514. cavity; 6. sealing assembly; 601 , the third electric push rod; 602, the fixing ring; 603, the first inflatable bag structure; 604, the thermal insulation film; 605, the first air pump; 7, the flow control component; 701, the support block; 702, the connecting rod; 703, the first temperature sensor; 704, the connecting block; 705, the second motor; 706, the disc body; 707, the limiting circular shell; 708, the second inflatable bag structure; 709, the second air pump; 710, the air supply pipe; 711, the second electric ball valve; 712, the fixing column; 8, the temperature measurement component; 801, the connecting pipe; 802, the heat collecting pipe; 803, the vacuum pump; 804, the third electric ball valve; 805, the second temperature sensor. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0035] The embodiment of the present invention provides a function detection device for production of a thermal gas mass flow meter. It includes a hot air box assembly 1, exemplarily, such as Figure 1 and Figure 2As shown, the hot air box assembly 1 is connected to a detection tube 2, the output end of the detection tube 2 is connected to a thermal gas mass flowmeter 3, the output end of the thermal gas mass flowmeter 3 is connected to a recovery bucket 4, the recovery bucket 4 is connected to a temperature measuring assembly 8, a compatible clamping assembly 5 is sleeved on the outer wall of the detection tube 2, a flow control assembly 7 is installed on the outer wall of the detection tube 2, and a sealing assembly 6 is installed on the compatible clamping assembly 5.

[0036] Before conducting functional testing for production, the detection equipment is connected and installed with the thermal gas mass flowmeter 3. First, it is connected with the output end of the thermal gas mass flowmeter 3 through the recovery barrel 4, and then it is connected with the input end of the thermal gas mass flowmeter 3 through the detection tube 2.

[0037] For example, Figure 3 As shown, the hot air box assembly 1 includes a hot air box body 101, a first electric push rod 102 is installed on the top inner wall of the hot air box body 101, a push plate 103 is installed on the output end of the first electric push rod 102, the outer wall of the push plate 103 slides on the inner wall of the hot air box body 101, a heating plate 104 is installed on the bottom inner wall of the hot air box body 101, and a first electric ball valve 105 is installed at the junction of the hot air box body 101 and the detection tube 2.

[0038] The heating plate 104 is turned on to heat the air in the hot air box body 101 to prepare for the subsequent functional detection work, and then the first electric ball valve 105 is turned on to make the hot air box body 101 and the thermal gas mass flowmeter 3 in a connected state, and then the first electric push rod 102 is started to push the push plate 103 down, and the push plate 103 begins to squeeze the air in the hot air box body 101, so that the hot air enters the thermal gas mass flowmeter 3 through the detection tube 2 for functional detection. The thermal flowmeter is a flow meter designed based on the principle of heat diffusion, that is, when the fluid flows through the heating object, the amount of heat dissipated by the heating object is in a certain proportional relationship with the flow rate of the fluid. The sensor of this series of flowmeters has two standard-grade RTDs, one is used as a heat source, and the other is used to measure the fluid temperature. When the fluid flows, the temperature difference between the two is linearly related to the flow rate, and then through microelectronic control technology, this relationship is converted into a linear output of the measurement flow signal.

[0039] For example, Figure 4 , Figure 5 and Figure 6As shown, the compatible clamping assembly 5 includes a fixed plate 501, a cavity 514 is opened on the fixed plate 501, the outer wall of the detection tube 2 is slidably fitted on the inner wall of the cavity 514, and two groups of sliding cavities 503 are symmetrically opened on a side wall of the fixed plate 501 close to the thermal gas mass flowmeter 3, and a threaded rod 502 is rotatably connected in each group of the sliding cavities 503, and two groups of first motors 505 are symmetrically installed on the inner walls of both sides of the fixed plate 501, and the output end of each group of the first motors 505 is transmission-connected to one of the threaded rods 502, and a balancing block 506 is movably sleeved on the outer wall of each group of the threaded rods 502, and one end of each group of the balancing blocks 506 is installed on the inner wall of the fixed plate 501, and each group of the threaded rods 502 is threadedly connected with a group of sliding blocks 504, and each group of the sliding The moving blocks 504 are all slidably connected in the sliding cavity 503, and a group of second electric push rods 507 are installed on the side wall of each group of sliding blocks 504 close to the thermal gas mass flowmeter 3, and a group of fixed blocks 508 are installed on the output end of each group of the second electric push rods 507. Two groups of slide grooves 509 are symmetrically opened on the side wall corresponding to each group of fixed blocks 508, and a group of mounting plates 510 are slidably connected in each group of the slide grooves 509. An elastic limiting plate 511 is connected between the two groups of mounting plates 510, and two groups of mounting blocks 512 are symmetrically installed on the side wall of each group of fixed blocks 508 close to the slide grooves 509. A group of compression springs 513 are installed on one side wall of each group of mounting blocks 512, and one end of each group of compression springs 513 away from the mounting block 512 is installed on one of the groups of mounting plates 510.

[0040] In order to improve the stability of the connection, the two groups of second electric push rods 507 are started to drive the two groups of elastic limit plates 511 to move to the two ends of the input end of the thermal gas mass flowmeter 3, and then the first motor 505 is started to drive the threaded rod 502 to rotate, and the threaded rod 502 drives the sliding block 504 to slide in the sliding cavity 503, and then drives the two groups of fixed blocks 508 to move in the direction close to the thermal gas mass flowmeter 3, and then when they contact the thermal gas mass flowmeter, they begin to bend and deform by squeezing, and during the bending process, they will drive the two groups of mounting plates 510 to slide in the sliding groove 509, and during the sliding process, they will drive the two groups of mounting plates 510 to pull the compression spring 513, when the subsequent two groups of mounting plates 510 finish working, the compression spring 513 feels that the pressure disappears and starts to rebound and reset, which improves the limiting stability effect while reducing the limitations of the shape of the inlet end of the thermal gas mass flowmeter.

[0041] For example, Figure 7As shown, the sealing assembly 6 includes a third electric push rod 601, one end of the third electric push rod 601 is installed on a side wall of the fixed plate 501, a fixed ring 602 is installed on the output end of the third electric push rod 601, a first air bag structure 603 is installed on the inner wall of the fixed ring 602, a thermal insulation film 604 is installed on the outer wall of the first air bag structure 603, the outer wall of the thermal insulation film 604 is slidably fitted on the outer wall of the detection tube 2, a first air pump 605 is installed on the outer wall of the fixed ring 602, and the output end of the first air pump 605 passes through the fixed ring 602 and is connected to the input end of the first air bag structure 603.

[0042] Start the third electric push rod 601 to push the fixed ring 602 to move toward the junction of the detection tube 2 and the thermal gas mass flowmeter 3, and then start the first air pump 605 to inflate the first air-filled bag structure 603, so that the first air-filled bag structure 603 can be expanded to seal and limit the junction, thereby preventing the subsequent problem of unstable air pressure due to air leakage at the junction, which reduces the detection accuracy. In addition, since the outer wall of the first air-filled bag structure 603 is provided with a heat-insulating film 604, the first air-filled bag structure 603 will not be damaged by the heat released by the detection tube 2, thereby extending the service life of the equipment, improving the sealing effect of the device and improving the service life of the device.

[0043] For example, Figure 8 As shown, the flow control component 7 includes a support block 701, which is mounted on the outer wall of the detection tube 2. A connecting rod 702 is mounted at the bottom of the support block 701. One end of the connecting rod 702 away from the support block 701 passes through the detection tube 2 and is connected to a connecting block 704. A first temperature sensor 703 is mounted on the outer wall of the connecting rod 702. The first temperature sensor 703 is located in the detection tube 2. A second motor 705 is mounted at the bottom of the connecting block 704. A fixed column 712 is transmission-connected to the output end of the second motor 705. The fixed column 71 A disc body 706 is installed at one end away from the second motor 705, a limiting circular shell 707 is sleeved on the outer wall of the disc body 706, a second air bag structure 708 is installed on the limiting circular shell 707, a second air pump 709 is installed on the disc body 706, an output end of the second air pump 709 passes through the limiting circular shell 707 and is connected to the input end of the second air bag structure 708, a plurality of groups of air delivery pipes 710 are movably passed through the disc body 706, and a group of second electric ball valves 711 are installed on the end of each group of air delivery pipes 710 close to the connecting rod 702.

[0044] In order to improve the functional detection effect of the equipment under different flow rates and different qualities of hot air, the second air pump 709 is started to fill the second inflatable bag structure 708, so that the second inflatable bag structure 708 expands and fills the space between the limiting circular shell 707 and the detection tube 2, thereby forming a closed space between the disc body 706 and the hot air delivery structure, and then the same amount of second electric ball valve 711 is selectively opened to allow an equal amount of hot air to pass through the air delivery pipe 710 for functional detection, thereby improving the precise and controllable effect of the detection, and in the subsequent hot air delivery process, the second motor 705 can be started to drive the disc body 706 to rotate and transport hot air, thereby improving the uniformity of hot air delivery and improving the functional detection effect of the equipment under different flow rates and different qualities of hot air.

[0045] For example, Fig. 9 As shown, the temperature measuring component 8 includes a connecting pipe 801, one end of the connecting pipe 801 is connected to the outer wall of the recovery barrel 4, the end of the connecting pipe 801 away from the recovery barrel 4 is connected to the heat collecting pipe 802, a third electric ball valve 804 is installed at the junction of the connecting pipe 801 and the heat collecting pipe 802, a vacuum pump 803 is installed on the outer wall of the heat collecting pipe 802, and a second temperature sensor 805 is installed on the outer wall of the heat collecting pipe 802.

[0046] When the hot air passes through the thermal gas mass flow meter 3 and enters the recovery barrel 4, the vacuum pump 803 is started and the third electric ball valve 804 is opened, so that the hot gas after the detection passes through the connecting pipe 801 and enters the heat collecting pipe 802. The temperature is detected by the second temperature sensor 805 to determine whether the temperature of the hot gas after the detection is within the specified functional value of the thermal gas mass flow meter, thereby improving the temperature detection effect and the diversity of functional detection.

[0047] The second air pump 709 is started to fill the second inflatable bag structure 708, so that the second inflatable bag structure 708 expands and fills the space between the limiting circular shell 707 and the detection tube 2, and then the second electric ball valve 711 is selectively opened to allow an equal amount of hot air to pass through the air pipe 710 for functional testing, thereby improving the precise and controllable effect of the detection, and in the subsequent hot air delivery process, the second motor 705 is started to drive the disc body 706 to rotate and transport hot air, thereby improving the uniformity of hot air delivery and improving the functional detection effect of the equipment under different flow rates and different quality hot air.

[0048] Start the two sets of second electric push rods 507 to drive the two sets of elastic limit plates 511 to move to the two ends of the input end of the thermal gas mass flowmeter 3, and then start the first motor 505 to drive the two sets of fixing blocks 508 to limit the thermal gas mass flowmeter 3. Then, when they come into contact with the thermal gas mass flowmeter, they begin to bend and deform by squeezing, and during the bending process, they drive the two sets of mounting plates 510 to slide in the slide groove 509, and during the sliding process, they drive the two sets of mounting plates 510 to pull the compression springs 513, thereby improving the limiting stability effect while reducing the limitations of the shape of the inlet end of the thermal gas mass flowmeter.

[0049] Start the third electric push rod 601 to push the fixed ring 602 to move toward the junction of the detection tube 2 and the thermal gas mass flowmeter 3, and then start the first air pump 605 to inflate the first air-filled bag structure 603, so that the first air-filled bag structure 603 can be expanded to seal and limit the junction, thereby preventing the subsequent problem of unstable air pressure due to air leakage at the junction, which reduces the detection accuracy. In addition, since the outer wall of the first air-filled bag structure 603 is provided with a heat-insulating film 604, the first air-filled bag structure 603 will not be damaged by the heat released by the detection tube 2, thereby extending the service life of the equipment, improving the sealing effect of the device and improving the service life of the device.

[0050] When the hot air passes through the thermal gas mass flow meter 3 and enters the recovery barrel 4, the vacuum pump 803 is started and the third electric ball valve 804 is opened, so that the hot gas after the detection passes through the connecting pipe 801 and enters the heat collecting pipe 802. The temperature is detected by the second temperature sensor 805 to determine whether the temperature of the hot gas after the detection is within the specified functional value of the thermal gas mass flow meter, thereby improving the temperature detection effect and the diversity of functional detection.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A function detection device for production of a thermal gas mass flowmeter, comprising a hot air box assembly (1), characterized in that: The hot air box component (1) is connected to a detection tube (2), the output end of the detection tube (2) is connected to a thermal gas mass flow meter (3), a compatible clamping component (5) is sleeved on the outer wall of the detection tube (2), a flow control component (7) is installed on the outer wall of the detection tube (2), and a sealing component (6) is installed on the compatible clamping component (5); The flow control component (7) comprises a second motor (705) and a disc body (706); a limiting circular shell (707) is sleeved on the outer wall of the disc body (706); a second air bag structure (708) is installed on the limiting circular shell (707); a second air pump (709) is installed on the disc body (706); a plurality of groups of air pipes (710) are movably passed through the disc body (706); a group of second electric ball valves (711) are installed at one end of each group of air pipes (710); an equal number of second electric ball valves (711) are opened to allow an equal amount of hot air to pass through the air pipes (710) before a functional test is performed.

2. The function detection device for production of thermal gas mass flowmeter according to claim 1, characterized in that: The output end of the thermal gas mass flow meter (3) is connected to a recovery bucket (4), and the recovery bucket (4) is connected to a temperature measuring component (8). The hot air box component (1) comprises a hot air box body (101), a first electric push rod (102) is installed on the top inner wall of the hot air box body (101), a push plate (103) is installed on the output end of the first electric push rod (102), and the outer wall of the push plate (103) is slidably fitted on the inner wall of the hot air box body (101), a heating plate (104) is installed on the bottom inner wall of the hot air box body (101), and a first electric ball valve (105) is installed at the junction of the hot air box body (101) and the detection tube (2).

3. The function detection device for production of thermal gas mass flowmeter according to claim 2, characterized in that: The compatible clamping assembly (5) comprises a fixed plate (501), a cavity (514) is provided on the fixed plate (501), the outer wall of the detection tube (2) is slidably fitted on the inner wall of the cavity (514), two groups of sliding cavities (503) are symmetrically provided on a side wall of the fixed plate (501) close to the thermal gas mass flow meter (3), a threaded rod (502) is rotatably connected in each group of the sliding cavities (503), two groups of first motors (505) are symmetrically installed on the inner walls on both sides of the fixed plate (501), the output end of each group of the first motors (505) is transmission-connected to one of the threaded rods (502), a balance block (506) is movably sleeved on the outer wall of each group of the threaded rods (502), and one end of each group of the balance blocks (506) is installed on the inner wall of the fixed plate (501).

4. The function detection device for production of thermal gas mass flowmeter according to claim 3, characterized in that: A group of sliding blocks (504) are threadedly connected to each group of threaded rods (502), and each group of sliding blocks (504) is slidably connected in the sliding cavity (503). A group of second electric push rods (507) are installed on a side wall of each group of sliding blocks (504) close to the thermal gas mass flow meter (3), and a group of fixed blocks (508) are installed on the output end of each group of second electric push rods (507).

5. The function detection device for production of thermal gas mass flowmeter according to claim 4, characterized in that: Two groups of sliding grooves (509) are symmetrically provided on a side wall corresponding to each group of the fixed blocks (508); a group of mounting plates (510) are slidably connected in each group of the sliding grooves (509); an elastic limiting plate (511) is connected between the two groups of mounting plates (510); two groups of mounting blocks (512) are symmetrically installed on a side wall of each group of the fixed blocks (508) close to the sliding grooves (509); a group of compression springs (513) are installed on a side wall of each group of the mounting blocks (512); and one end of each group of the compression springs (513) away from the mounting block (512) is installed on one of the groups of mounting plates (510).

6. The function detection device for production of thermal gas mass flowmeter according to claim 1, characterized in that: The sealing assembly (6) comprises a third electric push rod (601), one end of which is mounted on a side wall of a fixed plate (501), a fixed collar (602) is mounted on the output end of the third electric push rod (601), and a first inflatable bag structure (603) is mounted on the inner wall of the fixed collar (602).

7. The function detection device for production of thermal gas mass flowmeter according to claim 6, characterized in that: A heat-insulating film (604) is installed on the outer wall of the first inflatable bag structure (603), and the outer wall of the heat-insulating film (604) is slidably fitted on the outer wall of the detection tube (2). A first air pump (605) is installed on the outer wall of the fixed ring (602), and the output end of the first air pump (605) passes through the fixed ring (602) and is connected to the input end of the first inflatable bag structure (603).

8. The function detection device for production of thermal gas mass flowmeter according to claim 1, characterized in that: The flow control component (7) also includes a support block (701), wherein the support block (701) is mounted on the outer wall of the detection tube (2), a connecting rod (702) is mounted on the bottom of the support block (701), an end of the connecting rod (702) away from the support block (701) passes through the detection tube (2) and is connected to the connecting block (704), a first temperature sensor (703) is mounted on the outer wall of the connecting rod (702), and the first temperature sensor (703) is located in the detection tube (2), the second motor (705) is mounted on the bottom of the connecting block (704), a fixed column (712) is transmission-connected to the output end of the second motor (705), the disc body (706) is mounted on the end of the fixed column (712) away from the second motor (705), and the output end of the second air pump (709) passes through the limiting circular shell (707) and is connected to the input end of the second inflatable bag structure (708).

9. The function detection device for production of thermal gas mass flowmeter according to claim 2, characterized in that: The temperature measuring component (8) comprises a connecting pipe (801), one end of which is connected to the outer wall of the recovery barrel (4), and one end of which is away from the recovery barrel (4) is connected to a heat collecting pipe (802).

10. The function detection device for production of thermal gas mass flowmeter according to claim 9, characterized in that: A third electric ball valve (804) is installed at the junction of the connecting pipe (801) and the heat collecting pipe (802), a vacuum pump (803) is installed on the outer wall of the heat collecting pipe (802), and a second temperature sensor (805) is installed on the outer wall of the heat collecting pipe (802).

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