CN113503942A - Gas flowmeter detection device and detection method using detection device - Google Patents
Gas flowmeter detection device and detection method using detection device Download PDFInfo
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- CN113503942A CN113503942A CN202110840091.XA CN202110840091A CN113503942A CN 113503942 A CN113503942 A CN 113503942A CN 202110840091 A CN202110840091 A CN 202110840091A CN 113503942 A CN113503942 A CN 113503942A
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Abstract
The application relates to the field of flowmeter detection, in particular to a gas flowmeter detection device and a detection method using the detection device, wherein the gas flowmeter detection device comprises a gas supply mechanism for supplying compressed gas, a gas storage mechanism for storing and releasing the compressed gas and a test mechanism for detecting the accuracy of a gas flowmeter; the air storage mechanism comprises an air storage cylinder and a floating barrel arranged in the air storage cylinder in a sliding manner, an air storage space is formed by the inner side wall of the air storage cylinder and the bottom wall of the floating barrel, a guide frame is fixedly arranged on the outer side wall of the air storage cylinder, a sliding assembly is arranged at the top of the floating barrel, the sliding assembly is arranged on the guide frame in a sliding manner, a travel switch group is further arranged on the guide frame, and a traction assembly for traction of the floating barrel to move is arranged at the top of the guide frame; the gas supply mechanism and the testing mechanism are communicated with the bottom of the gas storage cylinder. The method has the advantages of being simple and convenient in detection method and high in detection efficiency.
Description
Technical Field
The application relates to the technical field of flowmeter detection, in particular to a gas flowmeter detection device and a detection method using the detection device.
Background
A gas flow meter is a meter that measures the flow of gas and is installed in a pipeline to record the amount of gas flowing through. With the great use of household gas meters, the detection requirements of gas flow meters are continuously improved. After the gas flowmeter is produced, the measurement accuracy of the gas flowmeter needs to be detected, and the detection is generally carried out by a gas flow detection device.
At present, most gas flow detection device detects through establishing ties or parallelly connected back with gas flowmeter and the standard gas flowmeter that awaits measuring, judges whether gas flowmeter that awaits measuring is qualified through the registration of comparing gas flowmeter and the standard gas flowmeter that awaits measuring. However, the above method has a high requirement on the gas supply precision of the gas supply module, and particularly when a plurality of standard gas flow meters are connected in parallel or in series, it is necessary to ensure that the gas pressure passing through the gas flow meter to be tested and the gas pressure passing through the standard gas flow meter are stable and the flow rates are equivalent.
Disclosure of Invention
In order to simplify the detection method of the gas flowmeter and improve the detection efficiency, the application provides a gas flowmeter detection device and a detection method using the detection device.
In a first aspect, the present application provides a gas flowmeter detection device, which adopts the following technical scheme:
a gas flowmeter detection device comprises a gas supply mechanism for supplying compressed gas, a gas storage mechanism for storing and releasing the compressed gas and a testing mechanism for detecting the accuracy of a gas flowmeter;
the air storage mechanism comprises an air storage cylinder and a floating barrel arranged in the air storage cylinder in a sliding manner, an air storage space is formed by the inner side wall of the air storage cylinder and the bottom wall of the floating barrel, a guide frame is fixedly arranged on the outer side wall of the air storage cylinder, a sliding assembly is arranged at the top of the floating barrel, the sliding assembly is arranged on the guide frame in a sliding manner, a travel switch group is further arranged on the guide frame, and a traction assembly for traction of the floating barrel to move is arranged at the top of the guide frame;
the gas supply mechanism and the testing mechanism are communicated with the bottom of the gas storage cylinder.
Through adopting above-mentioned technical scheme, when detecting the gas flowmeter that awaits measuring, through the air feed mechanism to the air storage mechanism air feed, compressed gas is with the flotation pontoon jack-up slowly, until the subassembly that slides is located travel switch group top, stops ventilating. When the gas storage mechanism supplies gas to the testing mechanism, the buoy slowly descends, when the sliding assembly passes through the starting point of the travel switch group, the gas flowmeter to be tested starts to work, and when the sliding assembly passes through the terminal point of the travel switch group, the gas flowmeter to be tested stops working. Because the starting point and the end point of the travel switch group are fixed, namely the distance between the starting point and the end point of the travel switch group is fixed, and then the actual gas discharge amount in the testing stage can be calculated according to the preset inner bottom area of the gas storage cylinder. And judging whether the gas flowmeter to be tested is qualified or not by comparing the test quantity of the gas flowmeter to be tested with the actual gas discharge quantity. According to the arrangement, the detection method of the gas flowmeter is simplified, the detection of the gas flowmeter can be completed without the help of a computer module for precise control, and the detection efficiency is improved.
Preferably, the fixed otic placode that is provided with in flotation pontoon top, the subassembly that slides is including fixed block and the first gyro wheel of setting near leading truck one end at the fixed block that sets up at the otic placode top. The fixing block is provided with a waist-shaped hole, a locking bolt is arranged in the waist-shaped hole, and the fixing block is fixed with the lug plate through the locking bolt.
Through adopting above-mentioned technical scheme, at the in-process that the flotation pontoon goes up and down, first gyro wheel rolls along vertical direction on the leading truck, has improved the smooth and easy degree that the flotation pontoon goes up and down, simultaneously, plays the guide effect to the lift of flotation pontoon, reduces the condition emergence that the flotation pontoon took place the skew at the lift in-process. Through setting up waist shape hole, be convenient for adjust the fixed block according to actual conditions, make first gyro wheel contradict with the leading truck.
Preferably, the number of the first rollers is two, the two first rollers are respectively arranged on two sides of the end part of the fixed block, the two first rollers incline towards the guide frame, and the inclination angle is 30-45 degrees. Further preferably, the inclination angle of the first roller is 45 °.
Through adopting above-mentioned technical scheme, through the cooperation of two sets of subassemblies that slide, and two first gyro wheels in the subassembly that slide with the group all incline towards the leading truck, have reduced the condition emergence of skew takes place at the flotation pontoon in-process that rises. The above-mentioned effects can be sufficiently exerted when the inclination angle is within the range of 30 to 45 °, and particularly, the anti-bias effect is most preferable when the inclination angle is 45 °.
Preferably, two one side that the fixed plate was kept away from to first gyro wheel all is provided with the extension rod, the extension rod is buckled towards the leading truck, two the extension rod forms staple bolt structure, just the one end that the first gyro wheel was kept away from to the extension rod still is provided with the second gyro wheel.
Through adopting above-mentioned technical scheme, can further improve the subassembly that slides and prevent inclined to one side effect to the flotation pontoon lift. When the sliding assembly passes through the travel switch group, the second roller can collide with a contact of the travel switch, so that the contact acts to connect or disconnect a control circuit, and the work of the flowmeter to be measured is controlled.
Preferably, the traction assembly comprises a fixed pulley block arranged at the top of the guide frame, a swing arm hinged to the side wall of the guide frame and a traction rope used for connecting the buoy and the swing arm, one end of the traction rope is fixedly arranged at the top of the buoy, and the other end of the traction rope is changed to be back through the fixed pulley block and is fixedly connected with one end of the swing arm far away from the guide frame.
By adopting the technical scheme, the traction assembly plays a role in traction buffering for the lifting of the buoy, when the buoy rises, the swing arm swings downwards, and the traction rope is kept in a tensioning state under the action of the gravity of the swing arm; when the flotation pontoon descends, the swing arm swings upwards, and the descending speed of the flotation pontoon can be reduced under the action of gravity of the swing arm, so that the situation that the test is influenced due to the too high descending speed of the flotation pontoon is reduced.
Preferably, the swing arm is provided with a heavy hammer, and the swing arm can be detachably provided with weights.
By adopting the technical scheme, the weight of the swing arm can be increased by the heavy hammer, and the descending speed of the buoy is slowed down in the process of supplying air to the testing mechanism by the air storage mechanism. Simultaneously, can dismantle on the swing arm and be provided with the weight, can further increase the weight of swing arm, according to the needs of in-service use, increase and decrease weight quantity to the falling speed of flotation pontoon when being convenient for further slow down the air receiver exhaust. According to the arrangement, on one hand, damage to equipment caused by the fact that the buoy descends too fast is reduced, on the other hand, the travel switch group is convenient to correspond, and testing errors are reduced.
Preferably, the air supply mechanism includes air supply spare and the air supply pipe with air supply spare output intercommunication, the one end and the air cylinder bottom intercommunication of air supply spare are kept away from to the air supply pipe, be provided with first valve on the air supply pipe.
Preferably, the air supply device can be an air compressor or other devices capable of providing compressed air.
Through adopting above-mentioned technical scheme, the air feed spare is used for providing compressed gas for gas storage mechanism, and compressed gas passes through the gas supply pipe and gets into in the gas storage mechanism. Through the arrangement, air supply is more convenient.
Preferably, the test mechanism includes the connecting pipe with gas receiver bottom intercommunication, keeps away from the intake pipe of the lateral wall intercommunication of gas receiver one end with the connecting pipe, sets up the outlet duct of keeping away from connecting pipe one end in the intake pipe and sets up in the outlet duct outside and be used for the gas flowmeter centre gripping that awaits measuring between intake pipe and outlet duct, the one end that the gas receiver was kept away from to the connecting pipe is provided with the second valve, the one side of gas receiver is kept away from in the intake pipe to the second valve setting, the one end that the intake pipe is close to the connecting pipe is provided with the third valve.
Through adopting above-mentioned technical scheme, the gas flowmeter that awaits measuring is by the centre gripping of holder centre gripping between intake pipe and outlet duct, and compressed gas in the gas storage mechanism gets into in the gas flowmeter behind connecting pipe, the intake pipe in proper order, then flows from the outlet duct again. The device is convenient for measurement of the gas flowmeter to be measured. The second valve and the third valve are arranged, so that the gas passage is convenient to control, and when the second valve is closed and the third valve is opened, gas can flow into the gas inlet pipe from the connecting pipe; when the second valve is opened and the third valve is closed, the gas in the gas storage mechanism is conveniently discharged to the outside.
Preferably, a lifting assembly used for assisting in installing the gas flowmeter to be tested is further arranged between the gas inlet pipe and the gas outlet pipe, and the lifting assembly is arranged at the bottom of the gas flowmeter to be tested.
Preferably, the lifting assembly comprises a second driving cylinder and a U-shaped supporting plate fixed at the top of the second driving cylinder.
Through adopting above-mentioned technical scheme, when needs will await measuring gas flowmeter centre gripping is fixed, will await measuring gas flowmeter earlier place in the backup pad, then open the second and drive actuating cylinder, will await measuring gas flowmeter lifting to between intake pipe and the outlet duct. As the arrangement, in the clamping process of the gas flowmeter to be tested, an operator is not required to lift the gas flowmeter all the time, so that the clamping and installation of the gas flowmeter are more convenient, and the manpower is saved.
In a second aspect, the present application provides a detection method for a gas flowmeter, which adopts the following technical solutions:
a method of testing a gas meter, comprising the steps of:
s1, gas storage: closing the second valve and the third valve, opening the first valve, introducing compressed air into the air storage cylinder through the air supply piece to enable the buoy to ascend, and closing the first valve to stop air supply when the buoy ascends to the top end and the sliding assembly is positioned at the top of the travel switch group;
s2, installing the gas flowmeter to be measured: placing the gas flowmeter to be tested on the lifting assembly, lifting the gas flowmeter to be tested to the middle of the gas inlet pipe and the gas outlet pipe through the lifting assembly, and tightly clamping the gas flowmeter to be tested between the gas inlet pipe and the gas outlet pipe through the clamping piece;
s3, test: opening a third valve, enabling compressed air in the air storage cylinder to sequentially pass through the connecting pipe, the air inlet pipe and the gas flowmeter to be detected and then to flow out of the air outlet pipe, enabling the floating barrel to fall down, enabling the gas flowmeter to be detected to work when the sliding assembly passes through the starting point of the travel switch group, enabling the gas flowmeter to be detected to finish working when the sliding assembly passes through the terminal point of the travel switch group, and marking the gas flow measured by the gas flowmeter to be detected as V1;
s4, calculating the actual gas emission: recording the inner bottom area of the air storage cylinder as S, and the distance between the starting point and the end point of the travel switch group as H, wherein the actual gas discharge amount is V = SH;
s5, analysis of results: and comparing the V1 with the V, if the error is not more than 0.5%, the gas flowmeter to be detected is qualified in detection, and if the error is more than 0.5%, the gas flowmeter to be detected is unqualified in detection.
By adopting the technical scheme, the detection method has the advantages of simple steps, small measurement error, simplified test steps and improved test efficiency, and can be used for measurement without the help of accurate control of a computer module.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the gas flowmeter, the gas storage cylinder is matched with the floating barrel, and the travel switch group is arranged, so that the actual gas discharge amount is convenient to calculate, the detection of the gas flowmeter to be detected is realized, the structure of the detection device is simplified, and the detection efficiency is improved;
2. the traction assembly is arranged, so that the traction and buffering effects on the lifting of the buoy are achieved, when the buoy descends, the descending speed of the buoy can be properly slowed down under the influence of the self weight of the swing arm, and the reduction of test errors is facilitated;
3. this application is through the distance of predetermineeing travel switch group and the interior bottom surface of gas storage cylinder, can calculate the actual gas discharge volume in the gas flowmeter working process that awaits measuring, then compares the measurement registration and the actual gas discharge volume of the gas flowmeter that awaits measuring, can judge whether the gas flowmeter that awaits measuring is qualified.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a gas flowmeter detecting device in the embodiment of the present application;
FIG. 2 is a schematic view of the gas supply mechanism in the embodiment of the present application for highlighting;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic diagram of the testing mechanism in the embodiment of the present application for highlighting the structure;
FIG. 5 is an enlarged view of portion B of FIG. 4;
FIG. 6 is a schematic view of the first clamping disk according to the embodiment of the present application for highlighting the first clamping disk.
Reference numerals: 1. an air supply mechanism; 101. a gas supply member; 102. a gas supply pipe; 2. a gas storage mechanism; 201. an air reservoir; 202. a float bowl; 3. a testing mechanism; 301. a connecting pipe; 302. an air inlet pipe; 303. an air outlet pipe; 304. a clamping member; 3041. a first driving cylinder; 3042. a piston rod; 3043. a first clamping plate; 4. a first valve; 5. a guide frame; 501. a vertical rod; 502. a transverse plate; 6. a slipping component; 601. a fixed block; 602. a first roller; 7. a travel switch group; 701. a start switch; 702. a termination switch; 8. a traction assembly; 801. a fixed pulley block; 8011. a fixed pulley; 802. swinging arms; 803. a hauling rope; 9. an ear plate; 10. a waist-shaped hole; 11. locking the bolt; 12. an extension pole; 13. a second roller; 14. a weight; 15. a weight; 16. a second valve; 17. a third valve; 18. a first clamping step; 19. a first gasket; 20. a second clamping plate; 21. a second clamping step; 22. a second gasket; 23. a lifting assembly; 231. a second driving cylinder; 232. a support plate; 24. a base.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses gas flowmeter detection device. Referring to fig. 1, the gas flowmeter detecting device includes a gas supply mechanism 1, a gas storage mechanism 2 and a testing mechanism 3. Wherein, the gas supply mechanism 1 and the testing mechanism 3 are both connected with the gas storage mechanism 2.
Referring to fig. 1, the air supply mechanism 1 includes an air supply member 101 and an air supply pipe 102, and in the embodiment of the present application, the air supply member 101 is an air compressor. One end of the air supply pipe 102 is communicated with the output end of the air supply part 101, one end of the air supply pipe 102, which is far away from the air supply part 101, is communicated with the air storage mechanism 2, and in order to control the opening and closing of the air supply pipe 102, the air supply pipe 102 is further provided with a first valve 4. When air needs to be supplied to the air storage mechanism 2, the first valve 4 is opened, and the air supply member 101 inputs compressed air into the air storage mechanism 2 through the air supply pipe 102, so as to complete the storage of the compressed air.
Referring to fig. 1 and 2, the air storage mechanism 2 includes a cylindrical air storage cylinder 201 and a float 202 slidably disposed in the air storage cylinder 201. The bottom of the float 202 is of a piston structure, so that the gas in the gas storage cylinder 201 leaks out through a gap between the float 202 and the inner side wall of the gas storage cylinder 201. The bottom of the air storage cylinder 201 is also provided with a cylindrical base 24, and the air supply pipe 102 penetrates through the side wall of the base 24 and then is communicated with the bottom in the air storage cylinder 201. In the air storage process, the air supply pipe 102 continuously supplies compressed air into the air storage cylinder 201 to slowly jack up the buoy 202, and at the moment, a closed area formed by the inner side wall of the air storage cylinder 201 and the piston at the bottom of the buoy 202 is an air storage space. The outer side wall of the air storage cylinder 201 is fixedly provided with a guide frame 5, and the guide frame 5 comprises two cylindrical vertical rods 501 and two square transverse plates 502 arranged at the tops of the vertical rods 501. The two vertical rods 501 are symmetrically arranged on two sides of the air storage cylinder 201 and are fixed with the outer side wall of the air storage cylinder 201, and the two transverse plates 502 are symmetrically arranged on two sides of the vertical rods 501 and fix the two vertical rods 501. The top of the float 202 is provided with two sets of sliding components 6, and the two sets of sliding components 6 are respectively arranged on two vertical rods 501 in a sliding manner. When the air storage cylinder 201 is inflated, the floating cylinder 202 is jacked up and ascended by compressed air, and the sliding component 6 is matched with the guide frame 5 in the sliding process of the floating cylinder 202, so that the ascending smoothness of the floating cylinder 202 is improved, and meanwhile, the floating cylinder 202 can be guided to ascend. The vertical rod 501 is further provided with a travel switch group 7 at a position between the air storage cylinder 201 and the horizontal plate 502, the travel switch group 7 includes a start switch 701 and an end switch 702, and in this embodiment, the start switch 701 and the end switch 702 are both roller travel switches.
Referring to fig. 2 and 3, the top of the float 202 is fixedly provided with the ear plate 9, and the sliding assembly 6 comprises a fixed block 601 arranged at the top of the ear plate 9 and a first roller 602 arranged at one end of the fixed block 601 close to the vertical rod 501. The fixing block 601 is provided with a waist-shaped hole 10, a locking bolt 11 is arranged in the waist-shaped hole 10, and the fixing block 601 is fixed with the lug plate 9 through the locking bolt 11. First gyro wheel 602 sets up to two, and two first gyro wheels 602 set up respectively in the both sides of fixed block 601 tip to two first gyro wheels 602 all incline towards the axis of montant 501, in this application embodiment, the inclination of first gyro wheel 602 is 45, thereby makes that first gyro wheel 602 can more smoothly slide along vertical direction on montant 501 surface. One side that fixed block 601 was kept away from to two first gyro wheels 602 all is provided with extension rod 12, and extension rod 12 is buckled towards montant 501 direction, and two extension rods 12 form the staple bolt structure in the montant 501 outside, and extension rod 12 keeps away from the one end of first gyro wheel 602 and still is provided with second gyro wheel 13, and second gyro wheel 13 slides the butt with montant 501 lateral wall.
Referring to fig. 2, the transverse plates 502 are further provided with a traction assembly 8, and the traction assembly 8 comprises a fixed pulley block 801 arranged between the two transverse plates 502, a swing arm 802 hinged to the vertical rod 501 through a pin shaft, and a traction rope 803. The fixed pulley set 801 is composed of two fixed pulleys 8011, the two fixed pulleys 8011 are arranged between the two transverse plates 502, and the two fixed pulleys 8011 are arranged at intervals along the horizontal direction. One end of the pulling rope 803 is fixedly connected with the center of the top of the buoy 202, and the other end of the pulling rope 803 is sequentially changed by two fixed pulleys 8011 and then fixedly connected with one end of the swing arm 802 far away from the guide frame 5. A weight 14 is disposed on the swing arm 802, and a weight 15 is detachably disposed on the swing arm 802. During the in-service use, can increase and decrease the quantity of weight 15 as required, through hanging weight 15 on swing arm 802, can improve the weight of swing arm 802, the speed that the flotation pontoon 202 descends when the gas storage cylinder 201 exhausts is convenient for slow down.
Referring to fig. 1 and 4, the testing mechanism 3 includes a connection pipe 301 penetrating through the base 24 and communicating with the bottom of the air reservoir 201, an air inlet pipe 302 communicating with a side wall of the connection pipe 301 far from one end of the air reservoir 201, an air outlet pipe 303 disposed at one end of the air inlet pipe 302 far from the connection pipe 301, and a clamping member 304 disposed outside the air outlet pipe 303. The end of the connecting pipe 301 far away from the air reservoir 201 is further provided with a second valve 16, the air inlet pipe 302 is arranged on the connecting pipe 301 and is positioned between the second valve 16 and the air reservoir 201, and the end of the air inlet pipe 302 close to the connecting pipe 301 is provided with a third valve 17.
Referring to fig. 4 and 5, the clamp 304 includes a first drive cylinder 3041, a piston stem 3042, and a first clamp plate 3043. The first driving cylinder 3041 is sleeved on the air outlet pipe 303, and one end of the first driving cylinder 3041 away from the air inlet pipe 302 is fixed to the air outlet pipe 303 in a sealing manner. The piston rod 3042 is slidably disposed at an end of the first driving cylinder 3041 close to the air inlet pipe 302, the piston rod 3042 is slidably disposed outside the air outlet pipe 303, and the piston rod 3042 and the air outlet pipe 303 are sealed by a piston.
Referring to fig. 5 and 6, the first clamping disk 3043 is integrally formed at an end of the piston rod 3042 close to the air inlet pipe 302, the first clamping disk 3043 is a tubular structure, an edge of a tubular passage of the first clamping disk 3043 close to an end of the air inlet pipe 302 is recessed inward to form a first clamping step 18, and a first sealing gasket 19 is fixedly disposed on a surface of the first clamping step 18. The end of the air inlet pipe 302 close to the first clamping disk 3043 is integrally formed with a second clamping disk 20, the second clamping disk 20 is also in a tubular structure, the edge of the tubular channel of the second clamping disk 20 close to the end of the first clamping disk 3043 is recessed inwards to form a second clamping step 21, and a second sealing gasket 22 is fixedly arranged on the surface of the second clamping step 21.
Before testing, the gas flowmeter to be tested is placed between the first clamping disk 3043 and the second clamping disk 20, the first driving cylinder 3041 is started, the first clamping disk 3043 pushes the gas flowmeter to be tested to move towards the second clamping disk 20, so that the gas flowmeter to be tested is inserted into the tubular channels of the first clamping disk 3043 and the second clamping disk 20 and is abutted against the first clamping step 18 and the second clamping step 21, and the gas flowmeter to be tested is clamped tightly. The first gasket 19 and the second gasket 22 reduce the occurrence of leakage of compressed air from both ends of the gas meter under test.
Referring to fig. 5, a lifting assembly 23 is further disposed between the air inlet pipe 302 and the air outlet pipe 303, and the lifting assembly 23 is disposed at the bottom of the gas flowmeter to be measured. The elevating assembly 23 includes a second driving cylinder 231 and a U-shaped supporting plate 232 fixed to the top of the second driving cylinder 231.
The detection method using the gas flowmeter detection device comprises the following steps:
s1, gas storage: closing the second valve 16 and the third valve 17, opening the first valve 4, introducing compressed air into the air storage cylinder 201 through the air supply piece 101 to enable the buoy 202 to ascend, and closing the first valve 4 and stopping air supply when the buoy 202 ascends to the top end and the sliding assembly 6 is positioned at the top of the travel switch group 7;
s2, installing the gas flowmeter to be measured: placing the gas flowmeter to be tested on the supporting plate 232, starting the second driving cylinder 231, lifting the gas flowmeter to be tested to the middle of the gas inlet pipe 302 and the gas outlet pipe 303, starting the first driving cylinder 3041, pushing the gas flowmeter to be tested to move towards the second clamping disk 20 by the piston sleeve rod 3042, and tightly clamping the gas flowmeter to be tested between the gas inlet pipe 302 and the gas outlet pipe 303 through the first clamping disk 3043 and the second clamping disk 20;
s3, test: opening the third valve 17, allowing the compressed air in the air storage cylinder 201 to sequentially pass through the connecting pipe 301, the air inlet pipe 302 and the gas flowmeter to be detected, and then flowing out of the air outlet pipe 303, allowing the buoy 202 to fall, allowing the gas flowmeter to be detected to work when the sliding assembly 6 passes through the starting switch 701, allowing the gas flowmeter to be detected to complete work when the sliding assembly 6 passes through the stopping switch 702, and recording the gas flow measured by the gas flowmeter to be detected as V1;
s4, calculating the actual gas emission: recording the inner bottom area of the gas cylinder 201 as S, and the distance between the starting switch 701 and the ending switch 702 as H, wherein the actual gas discharge amount V = SH;
s5, analysis of results: and comparing the V1 with the V, if the error is not more than 0.5%, the gas flowmeter to be detected is qualified in detection, and if the error is more than 0.5%, the gas flowmeter to be detected is unqualified in detection.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The gas flowmeter detection device is characterized by comprising a gas supply mechanism (1) for supplying compressed gas, a gas storage mechanism (2) for storing and releasing the compressed gas and a testing mechanism (3) for detecting the accuracy of a gas flowmeter;
the gas storage mechanism (2) comprises a gas storage cylinder (201) and a buoy (202) arranged in the gas storage cylinder (201) in a sliding mode, a gas storage space is formed by the inner side wall of the gas storage cylinder (201) and the bottom wall of the buoy (202), a guide frame (5) is fixedly arranged on the outer side wall of the gas storage cylinder (201), a sliding assembly (6) is arranged at the top of the buoy (202), the sliding assembly (6) is arranged on the guide frame (5) in a sliding mode, a travel switch group (7) is further arranged on the guide frame (5), and a traction assembly (8) used for traction the buoy (202) to move is arranged at the top of the guide frame (5);
the gas supply mechanism (1) and the testing mechanism (3) are communicated with the bottom of the gas storage cylinder (201).
2. The gas flowmeter detection device as claimed in claim 1, wherein an ear plate (9) is fixedly arranged on the top of the float (202), and the sliding assembly (6) comprises a fixed block (601) fixedly arranged on the top of the ear plate (9) and a first roller (602) arranged at one end of the fixed block (601) close to the guide frame (5).
3. The gas flowmeter detecting device according to claim 2, wherein the first rollers (602) are provided in two, the two first rollers (602) are respectively provided on both sides of an end of the fixed block (601), and both the first rollers (602) are inclined toward the guide frame (5) at an angle of 30-45 °.
4. The gas flowmeter detection device according to claim 3, wherein an extension rod (12) is arranged on each side of the two first rollers (602) away from the fixed plate, the extension rods (12) are bent towards the guide frame (5), the two extension rods (12) form a hoop structure, and a second roller (13) is further arranged at one end of each extension rod (12) away from the first roller (602).
5. The gas flowmeter detection device of claim 1, wherein the pulling assembly (8) comprises a fixed pulley block (801) arranged at the top of the guide frame (5), a swing arm (802) hinged to the side wall of the guide frame (5), and a pulling rope (803) for connecting the buoy (202) with the swing arm (802), one end of the pulling rope (803) is fixedly arranged at the top of the buoy (202), and the other end of the pulling rope (803) is changed back through the fixed pulley block (801) to be fixedly connected with one end of the swing arm (802) far away from the guide frame (5).
6. The gas flowmeter detecting device according to claim 5, wherein a weight (14) is disposed on the swing arm (802), and a weight (15) is detachably disposed on the swing arm (802).
7. The gas flowmeter detecting device as claimed in claim 1, wherein the gas supply mechanism (1) comprises a gas supply member (101) and a gas supply pipe (102) communicated with an output end of the gas supply member (101), one end of the gas supply pipe (102) far away from the gas supply member (101) is communicated with the bottom of the gas storage cylinder (201), and the gas supply pipe (102) is provided with a first valve (4).
8. The gas flowmeter detecting device according to claim 1, wherein the testing mechanism (3) comprises a connecting pipe (301) communicated with the bottom of the gas storage cylinder (201), a gas inlet pipe (302) communicated with the side wall of the connecting pipe (301) far away from one end of the gas storage cylinder (201), a gas outlet pipe (303) arranged at one end of the gas inlet pipe (302) far away from the connecting pipe (301), and a clamping piece (304) arranged outside the gas outlet pipe (303) and used for clamping the gas flowmeter to be tested between the gas inlet pipe (302) and the gas outlet pipe (303), the end of the connecting pipe (301) far away from the gas storage cylinder (201) is provided with the second valve (16), the second valve (16) is arranged at one side of the gas inlet pipe (302) far away from the gas storage cylinder (201), and one end of the gas inlet pipe (302) close to the connecting pipe (301) is provided with the third valve (17).
9. The gas flowmeter detection device according to claim 8, wherein a lifting assembly (23) for assisting in installing the gas flowmeter to be detected is further arranged between the gas inlet pipe (302) and the gas outlet pipe (303), and the lifting assembly (23) is arranged at the bottom of the gas flowmeter to be detected.
10. A detection method of a gas flowmeter is characterized by comprising the following steps:
s1, gas storage: closing the second valve (16) and the third valve (17), opening the first valve (4), introducing compressed air into the air storage cylinder (201) through the air supply piece (101) to enable the buoy (202) to ascend, and closing the first valve (4) to stop air supply when the buoy (202) ascends to the top end and the sliding assembly (6) is located at the top of the travel switch group (7);
s2, installing the gas flowmeter to be measured: placing a gas flowmeter to be tested on the lifting assembly (23), lifting the gas flowmeter to be tested to the middle of the gas inlet pipe (302) and the gas outlet pipe (303) through the lifting assembly (23), and tightly clamping the gas flowmeter to be tested between the gas inlet pipe (302) and the gas outlet pipe (303) through the clamping piece (304);
s3, test: opening a third valve (17), enabling compressed air in the air storage cylinder (201) to sequentially pass through a connecting pipe (301), an air inlet pipe (302) and the gas flowmeter to be detected and then to flow out of an air outlet pipe (303), enabling the buoy (202) to fall down, enabling the gas flowmeter to be detected to work when the sliding assembly (6) passes through the starting point of the travel switch group (7), enabling the gas flowmeter to be detected to finish working when the sliding assembly (6) passes through the end point of the travel switch group (7), and marking the gas flow measured by the gas flowmeter to be detected as V1;
s4, calculating the actual gas emission: recording the inner bottom area of the air storage cylinder (201) as S, and the distance between the starting point and the end point of the travel switch group (7) as H, wherein the actual gas discharge amount V = SH;
s5, analysis of results: and comparing the V1 with the V, if the error is not more than 0.5%, the gas flowmeter to be detected is qualified in detection, and if the error is more than 0.5%, the gas flowmeter to be detected is unqualified in detection.
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| CN202110840091.XA CN113503942A (en) | 2021-07-24 | 2021-07-24 | Gas flowmeter detection device and detection method using detection device |
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| CN202110840091.XA CN113503942A (en) | 2021-07-24 | 2021-07-24 | Gas flowmeter detection device and detection method using detection device |
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| CN1123022A (en) * | 1994-02-08 | 1996-05-22 | 赫尔曼·克朗塞德机械工厂克朗塞有限公司 | Process for filling containers with a certain volume of liquid |
| US20090019914A1 (en) * | 2007-07-16 | 2009-01-22 | James Edward Winchester | Flowmeter Calibration System and Operational Method |
| CN205748519U (en) * | 2016-04-27 | 2016-11-30 | 新奥科技发展有限公司 | Gas flow meter calibrating installation |
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| CN207816420U (en) * | 2018-02-28 | 2018-09-04 | 丹东贝特自动化工程仪表有限公司 | A kind of bell-jar gas flow calibrating installation |
| CN209356031U (en) * | 2019-01-22 | 2019-09-06 | 合肥智旭仪表有限公司 | A kind of dual measurement caliberating device of flowmeter |
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- 2021-07-24 CN CN202110840091.XA patent/CN113503942A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1123022A (en) * | 1994-02-08 | 1996-05-22 | 赫尔曼·克朗塞德机械工厂克朗塞有限公司 | Process for filling containers with a certain volume of liquid |
| US20090019914A1 (en) * | 2007-07-16 | 2009-01-22 | James Edward Winchester | Flowmeter Calibration System and Operational Method |
| CN205748519U (en) * | 2016-04-27 | 2016-11-30 | 新奥科技发展有限公司 | Gas flow meter calibrating installation |
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Application publication date: 20211015 |