CN216899151U

CN216899151U - Large-flow sonic nozzle type gas flow standard device

Info

Publication number: CN216899151U
Application number: CN202122883374.0U
Authority: CN
Inventors: 刘盈君; 杨依林; 王辉
Original assignee: Kaifeng Xinao Gas Co ltd
Current assignee: Kaifeng Xinao Gas Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-07-05
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a large-flow sonic nozzle type gas flow standard device, which relates to the technical field of gas flow calibration, in particular to a large-flow sonic nozzle type gas flow standard device. This large-traffic sound velocity nozzle formula gas flow standard device sets up through the cooperation of pressure-measuring chamber and pressure indication mechanism, can detect the flow of gas under the prerequisite of guaranteeing the whole leakproofness of pipeline road at the in-process that uses, avoids having unnecessary pipeline branch to influence whole leakproofness after the calibration finishes, has guaranteed the holistic leakproofness of pipeline under the high atmospheric pressure operating condition in long-time use.

Description

Large-flow sonic nozzle type gas flow standard device

Technical Field

The utility model relates to the technical field of gas flow calibration, in particular to a high-flow sonic nozzle type gas flow standard device.

Background

Flow rate is the amount of fluid that passes through a certain cross-sectional area in a unit of time. Measuring the flow rate of a fluid flowing within a channel is commonly referred to as flow metering. The gas flow rate is related to temperature, pressure, etc. In the industrial and research fields related to gas, the gas flowmeter is widely used in the process of calibrating gas flow, and compared with a pore plate flowmeter, the pressure loss of the nozzle flowmeter is smaller, so that the energy is saved, the nozzle flowmeter is firmer and durable, is suitable for high-temperature and high-pressure fluid, and is widely used for steam flow measurement in industries such as electric power industry and chemical industry.

Present nozzle formula flowmeter, get the pressure differential that the pipeline was intercepted through the setting when the pressure differential at calculation nozzle both ends mostly, calculate the gas flow who passes through calculating the pressure differential, thereby calibrate according to calculating numerical value, such calibration process at first need set up the return line at the both ends of nozzle, the return line keeps the normal position mostly after the calibration finishes, but the calibration work is not carried out at all times, under the not calibration condition, if atmospheric pressure is too high through long-time use, the return line can increase the hidden danger of the whole gas leakage of pipeline with the junction of pipeline inevitable, and the process of dismantling at current nozzle formula flow calibrating device installation is comparatively complicated, influence the efficiency of calibration.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a large-flow sonic nozzle type gas flow standard device, which solves the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: the high-flow sonic nozzle type gas flow standard device comprises a detection pipe, wherein two ends of the detection pipe are provided with slidable connecting sleeves, the interior of the connecting sleeve is inserted with a connector, one end of the detection tube positioned in the connecting sleeve is provided with a connecting socket, a sealing ring is arranged inside the connecting socket, a connecting groove is arranged on the connecting socket, a limiting ball is movably connected inside the connecting groove, the outer surface of one end of the connecting head inserted in the connecting sleeve is provided with a limit groove matched with the limit ball, the top of the inner surface of the connecting sleeve is provided with a abdication groove matched with the limiting ball, the top of the connecting sleeve is provided with an indicating lamp, the inner surface of the middle part of the detection tube is provided with a nozzle, one side of the nozzle in the detection tube is provided with a stop block, pressure measuring chambers are arranged on the two sides of the nozzle on the detection pipe, and pressure indicating mechanisms are arranged at the tops of the pressure measuring chambers.

Optionally, one end of the connecting sleeve, which is far away from the connector, is in threaded connection with a locking bolt, and one end of the locking bolt abuts against the annular side face of the connecting socket.

Optionally, the sealing ring is filled with electrorheological fluid, and the electrorheological fluid in the sealing ring is electrically connected with the indicator lamp through a lead.

Optionally, the pressure measuring chamber includes a sealed cavity, a piezoresistor is arranged at the top of the inner surface of the sealed cavity, an elastic sealing plate is arranged at the bottom of the sealed cavity, and a flexible pressing plate is arranged in the sealed cavity and between the piezoresistor and the elastic sealing plate.

Optionally, pressure indication mechanism includes protective housing, protective housing's inside is rotated and is connected with the pilot lever, protective housing's inside and the corresponding one end of pilot lever are equipped with the instruction scale, the other end of pilot lever is equipped with the transmission groove, protective housing's inside is equipped with the direction spout, the inside one end of direction spout is equipped with the circular telegram spring, the other end transmission of circular telegram spring is connected with the sliding block, the top of sliding block is equipped with the spicing axle.

Optionally, the sliding block is connected in the guide sliding groove in a sliding mode, the insertion shaft is inserted in the transmission groove, the height of the sliding block in the vertical direction is lower than the lower surface of the indicating rod, and the power-on spring is electrically connected with the piezoresistor through a wire.

(III) advantageous effects

The utility model provides a large-flow sonic nozzle type gas flow standard device, which has the following beneficial effects:

1. this large-traffic sound velocity nozzle formula gas flow standard device sets up through the cooperation of pressure-measuring chamber and pressure indicating mechanism, can detect the flow of gas under the prerequisite of guaranteeing the whole leakproofness of pipeline road in the in-process of using, avoids having unnecessary pipeline branch to influence whole leakproofness after the calibration finishes, has guaranteed the holistic leakproofness of pipeline under high atmospheric pressure operating condition in long-time use.

2. This large-traffic sound velocity nozzle formula gas flow standard device, through adapter sleeve, the connector, connect the socket, the spread groove, the cooperation setting of spacing ball and spacing groove, can be convenient quick install this device on the pipeline, and also can be quick dismantlement when change is dismantled to needs, the efficiency of flow calibration work has been improved greatly, the loaded down with trivial details degree of installation has been reduced, cooperation setting through sealing washer and pilot lamp, can monitor the junction of sense tube and gas transmission pipeline, can be directly perceived timely give the staff with leaking gas the phenomenon feedback, avoid the junction to leak gas the accuracy nature that influences the flow calibration.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front cross-sectional structural schematic view of the present invention;

FIG. 3 is a front cross-sectional structural schematic view of the coupling sleeve of the present invention;

fig. 4 is a schematic structural view in a top cross section of the pressure indicating mechanism of the present invention.

In the figure: 1. a detection tube; 2. connecting a sleeve; 3. a connector; 4. a connecting socket; 5. a seal ring; 6. connecting grooves; 7. a limiting ball; 8. a limiting groove; 9. an indicator light; 10. a nozzle; 11. a stopper; 12. a pressure measuring chamber; 1201. sealing the cavity; 1202. a voltage dependent resistor; 1203. an elastic sealing plate; 1204. a flexible platen; 13. a pressure indicating mechanism; 1301. a protective housing; 1302. an indication lever; 1303. indicating scales; 1304. a transmission groove; 1305. a guide chute; 1306. a power-on spring; 1307. a slider; 1308. a plug shaft; 14. a yielding groove; 15. and locking the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 4, the present invention provides a technical solution: the high-flow sound velocity nozzle type gas flow standard device comprises a detection tube 1, two ends of the detection tube 1 are provided with slidable connecting sleeves 2, a connector 3 is inserted in the connecting sleeve 2, one end of the detection tube 1, which is positioned in the connecting sleeve 2, is provided with a connecting socket 4, one end of the connecting sleeve 2, which is far away from the connector 3, is in threaded connection with a locking bolt 15, one end of the locking bolt 15 is abutted against the annular side surface of the connecting socket 4, a sealing ring 5 is arranged in the connecting socket 4, the connecting socket 4 is provided with a connecting groove 6, the inside of the connecting groove 6 is movably connected with a limiting ball 7, the outer surface of one end of the connector 3, which is inserted in the connecting sleeve 2, is provided with a limiting groove 8 matched with the limiting ball 7, the top of the inner surface of the connecting sleeve 2 is provided with a stepping groove 14 matched with the limiting ball 7, the top of the connecting sleeve 2 is provided with an indicator lamp 9, and the inside of the sealing ring 5 is filled with electrorheological fluid, the electrorheological fluid in the sealing ring 5 is electrically connected with an indicator lamp 9 through a lead, a nozzle 10 is arranged on the inner surface of the middle part of the detection tube 1, a stop block 11 is arranged on one side, which is positioned at the nozzle 10, of the detection tube 1, pressure measuring chambers 12 are arranged on the two sides, which are positioned at the nozzle 10, of the detection tube 1, the pressure measuring chambers 12 comprise a sealed cavity 1201, a piezoresistor 1202 is arranged at the top of the inner surface of the sealed cavity 1201, an elastic sealing plate 1203 is arranged at the bottom of the sealed cavity 1201, a flexible pressing plate 1204 is arranged between the piezoresistor 1202 and the elastic sealing plate 1203 in the sealed cavity 1201, a pressure indicating mechanism 13 is arranged at the top of the pressure measuring chamber 12, the pressure indicating mechanism 13 comprises a protective shell 1301, an indicating rod 1302 is rotatably connected inside the protective shell 1301, an indicating scale 1303 is arranged at one end, which corresponds to the indicating rod 1302, a transmission groove 1304 is arranged at the other end of the indicating rod 1302, a guide sliding groove 1305 is arranged inside the protective shell 1301, an energizing spring 1306 is arranged at one end inside the guide sliding groove 1305, a sliding block 1307 is in transmission connection with the other end of the energizing spring 1306, a plug-in shaft 1308 is arranged at the top of the sliding block 1307, the sliding block 1307 is in sliding connection with the guide sliding groove 1305, the plug-in shaft 1308 is plugged in the transmission groove 1304, the height of the sliding block 1307 in the vertical direction is lower than the lower surface of the indicating rod 1302, and the energizing spring 1306 is electrically connected with the piezoresistor 1202 through a wire.

When in use, the connectors 3 at two ends are fixedly connected with the pipeline to be calibrated, the locking bolt 15 is loosened, the connecting sleeve 2 is pulled to enable the position of the abdicating groove 14 to correspond to the position of the connecting groove 6, the connectors 3 connected with the pipelines at two ends are inserted into the connecting sleeve 2, the connector 3 pushes the limiting ball 7 to enter the abdicating groove 14 in the inserting process, after the connectors are completely inserted, one end of the connector 3 is tightly abutted against the side surface of the sealing ring 5, the position of the limiting groove 8 corresponds to the position of the limiting ball 7 at the moment, the connecting sleeve 2 is pulled to be in situ, the abdicating groove 14 and the connecting groove 6 are staggered, the limiting balls 7 arranged in an annular array are inserted into the corresponding limiting groove 8, then the locking bolt 15 is locked, the relative position of the connecting sleeve 2 and the detection tube 1 cannot be changed, and the limiting ball 7 is kept inserted into the corresponding limiting groove 8, the connection process is realized, when the sealing ring 5 is damaged to influence the connection tightness, the electrorheological fluid in the sealing ring 5 leaks, the electrorheological fluid in the sealing ring 5 becomes an open circuit state, so that the indicator lamp 9 electrically connected with the sealing ring is extinguished, poor sealing is fed back to a worker, the air pressures at two ends of the nozzle 10 change, so that the pressures of the elastic sealing plates 1203 at two sides of the nozzle 10 are different, the pressures conducted to the piezoresistor 1202 through the flexible pressing plate 1204 are different, the currents passing through the piezoresistor 1202 are different, the contraction amounts of the energized springs 1306 are different after the energized springs 1306 are passed through the energized springs 1306, the displacement distances of the sliding blocks 1307 are different, the rotation angles of the indicating rods 1302 are also different, and the air flow can be detected by reading the air pressures at two ends of the nozzle 10 at different pointing indication scales 1303, so that the gas flow can be calibrated according to the detection result.

In conclusion, the device can detect the flow of gas on the premise of ensuring the whole sealing performance of a pipeline road in the using process through the matching arrangement of the pressure measuring chamber 12 and the pressure indicating mechanism 13, avoids the influence of redundant pipeline branches on the whole sealing performance after the calibration is finished, ensures the whole sealing performance of the pipeline under the high-pressure working condition in the long-time using process, can be conveniently and quickly installed on the pipeline through the matching arrangement of the connecting sleeve 2, the connecting head 3, the connecting socket 4, the connecting groove 6, the limiting ball 7 and the limiting groove 8, can be quickly disassembled when the disassembly and replacement are needed, greatly improves the efficiency of flow calibration work, reduces the complexity of installation, can monitor the connection part of the detecting pipe 1 and the gas transmission pipeline through the matching arrangement of the sealing ring 5 and the indicating lamp 9, the air leakage phenomenon can be visually and timely fed back to the working personnel, and the influence of air leakage at the joint on the accuracy of flow calibration is avoided.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. Large-traffic sound velocity nozzle formula gas flow standard device, including test tube (1), its characterized in that: the detection device is characterized in that slidable connecting sleeves (2) are arranged at two ends of the detection tube (1), a connector (3) is inserted into the connecting sleeves (2), a connecting socket (4) is arranged at one end, located in the connecting sleeves (2), of the detection tube (1), a sealing ring (5) is arranged inside the connecting socket (4), a connecting groove (6) is arranged on the connecting socket (4), a limiting ball (7) is movably connected inside the connecting groove (6), a limiting groove (8) matched with the limiting ball (7) is arranged on the outer surface of one end, inserted into the connecting sleeves (2), of the connector (3), a yielding groove (14) matched with the limiting ball (7) is arranged at the top of the inner surface of the connecting sleeves (2), an indicating lamp (9) is arranged at the top of the connecting sleeves (2), and a nozzle (10) is arranged on the inner surface of the middle part of the detection tube (1), one side of the interior of the detection pipe (1) located at the nozzle (10) is provided with a stop block (11), pressure measurement chambers (12) are arranged on the two sides of the detection pipe (1) located at the nozzle (10), and the tops of the pressure measurement chambers (12) are provided with pressure indication mechanisms (13).

2. The mass flow sonic nozzle-type gas flow calibration device of claim 1, wherein: one end of the connecting sleeve (2) far away from the connector (3) is connected with a locking bolt (15) in a threaded mode, and one end of the locking bolt (15) abuts against the annular side face of the connecting socket (4).

3. The mass flow sonic nozzle-type gas flow calibration device of claim 1, wherein: the electrorheological fluid is filled in the sealing ring (5), and the electrorheological fluid in the sealing ring (5) is electrically connected with the indicator lamp (9) through a lead.

4. The mass flow sonic nozzle-type gas flow calibration device of claim 1, wherein: the pressure measuring chamber (12) comprises a sealed cavity (1201), a piezoresistor (1202) is arranged at the top of the inner surface of the sealed cavity (1201), an elastic sealing plate (1203) is arranged at the bottom of the sealed cavity (1201), and a flexible pressing plate (1204) is arranged in the sealed cavity (1201) and located between the piezoresistor (1202) and the elastic sealing plate (1203).

5. The mass flow sonic nozzle-type gas flow calibration device of claim 1, wherein: the pressure indication mechanism (13) comprises a protective shell (1301), an indication rod (1302) is rotatably connected to the interior of the protective shell (1301), indication scales (1303) are arranged at one end, corresponding to the indication rod (1302), of the interior of the protective shell (1301), a transmission groove (1304) is formed in the other end of the indication rod (1302), a guide sliding groove (1305) is formed in the interior of the protective shell (1301), an electrifying spring (1306) is arranged at one end of the interior of the guide sliding groove (1305), a sliding block (1307) is connected to the other end of the electrifying spring (1306) in a transmission mode, and a plug-in shaft (1308) is arranged at the top of the sliding block (1307).

6. The mass flow sonic nozzle-type gas flow calibration device of claim 5, wherein: the sliding block (1307) is connected in the guide sliding groove (1305) in a sliding mode, the inserting shaft (1308) is inserted into the transmission groove (1304), the height of the sliding block (1307) in the vertical direction is lower than the lower surface of the indicating rod (1302), and the electrified spring (1306) is electrically connected with the piezoresistor (1202) through a wire.