CN209928602U

CN209928602U - Gas alarm calibrating device

Info

Publication number: CN209928602U
Application number: CN201920683508.4U
Authority: CN
Inventors: 李勇; 罗京广; 王国锋; 崔国居; 戈琳; 张志强; 周卫锋; 曾毅; 李畅; 陈小萌; 郎宝
Original assignee: PETROCHEMICAL GENERAL PLANT SHENGLI OILFIELD BRANCH CHINA PETROLEUM & CHEMICAL Corp; China Petrochemical Corp
Current assignee: PETROCHEMICAL GENERAL PLANT SHENGLI OILFIELD BRANCH CHINA PETROLEUM & CHEMICAL Corp; China Petroleum and Chemical Corp; China Petrochemical Corp
Priority date: 2019-04-04
Filing date: 2019-05-14
Publication date: 2020-01-10
Anticipated expiration: 2029-05-14
Also published as: CN111784993A

Abstract

The utility model provides a gas alarm calibrating installation, a gas alarm calibrating installation includes gas alarm calibration module, gas circuit module, portable ventilation case and diffusion cover connector, the diffusion cover connector is located in the portable ventilation incasement, gas alarm calibration module passes through the gas circuit module is connected in the gas alarm who treats the examination. A gas alarm calibrating installation when improving 3 times examination work efficiency, very big reduction examination personnel intensity of labour has reduced occupational disease risk. The gas alarm calibration process is convenient, fast, safe and efficient, and an ideal use effect is obtained.

Description

Gas alarm calibrating device

Technical Field

The utility model relates to a combustible and poisonous and harmful gas alarm examination technical field especially involves a gas alarm calibrating installation.

Background

In recent years, safety accidents caused by combustible and poisonous harmful gases have increased the safety protection of petrochemical enterprises in the processes of oil and gas development, storage and processing, and the purchasing and using quantity of combustible and poisonous harmful gas alarms serving as important safety protection equipment is greatly increased year by year. At present, when a gas alarm is tested in a laboratory, standard gas is supplied to the outside of a standard gas cylinder in a fume hood for testing. The standard gas cylinder needs to be moved up and down frequently, so that the problems of high labor intensity, high danger and low verification working efficiency exist. Most of advanced calibrating devices in the market are over-expensive, and most of the advanced calibrating devices are not accurate in judgment of acquisition time of a stable value after standard gas is introduced into an instrument for a portable gas alarm under the condition that no electric signal is output for acquisition. Therefore, a novel gas alarm calibrating device is provided, and the technical problems are solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a small, easy and simple to handle has improved a gas alarm calibrating installation of examination efficiency.

The purpose of the utility model can be realized by the following technical measures:

the utility model provides a gas alarm calibrating installation, includes gas alarm verification module, gas circuit module, portable ventilation case, diffusion cover connector is located in the portable ventilation incasement for the gas alarm that the centre gripping was waited to examine and determine, gas alarm verification module passes through the gas circuit module is connected in the gas alarm of waiting to examine and determine.

The diffusion cover connector comprises a base plate, a spring, a diffusion cover, a traveling block and a slide rail beam, wherein the slide rail beam is located above the base plate, a U-shaped groove is formed in the slide rail beam, the spring is located on the inner side of the U-shaped groove of the slide rail beam, one end of the slide rail beam is connected with the base plate, the other end of the slide rail beam is connected with the traveling block, the traveling block is connected with the spring, the diffusion cover penetrates through a tail air faucet, a through hole of the traveling block is formed in the lower side of the traveling block in an interference fit mode with the through hole of the traveling block, and the diffusion cover is external to the air.

Portable ventilation case includes that the gas circuit passes hole, has transparent removable cover, bellows, vane, ventilation hole, air discharge fan of loose axle, the vane is located portable ventilation case's box upper portion, the air discharge fan install in portable ventilation case right side boxboard upper portion trompil department, the bellows in the box outside with air discharge fan air outlet interference fit connects, the ventilation hole is located portable ventilation case left side boxboard upper portion, the gas circuit module passes through the gas circuit pass the hole with in the portable ventilation case the diffusion cover connector is connected, the transparent removable cover who has the loose axle is installed at portable ventilation roof portion.

The portable ventilation box comprises a rechargeable battery and a key switch, the rechargeable battery is connected with the key switch, and the key switch is connected with the exhaust fan.

The gas circuit module comprises a through plate, a hand-pull valve, a float flowmeter, a gas-containing tank and a pressure gauge, wherein the gas-containing tank is connected to a standard gas cylinder and receives standard gas, the pressure gauge is connected to the gas-containing tank, the through plate is connected to the hand-pull valve and the float flowmeter are provided with a plurality of single through plate, the hand-pull valve and the float flowmeter are connected in sequence and then are connected to the gas-containing tank.

The gas alarm calibrating device further comprises a temperature and humidity time instrument, and the temperature and humidity time instrument is mounted at the upper left part of the panel of the gas alarm calibrating module.

The gas alarm calibrating device further comprises a circuit module, wherein the circuit module comprises an alternating current power supply, a leakage protector, a transformer, a manual switch, a fuse, a terminal bar and a coaxial socket which are sequentially connected, and the coaxial socket is connected with a gas alarm to be calibrated.

The utility model provides a gas alarm calibrating installation can be applied to the product of flammable and poisonous and harmful gas alarm manufacturing enterprise and examine and determine in batches to and the manufacturing enterprise of using flammable and poisonous and harmful gas alarm in a large number such as oil refining chemical industry, the technical test department that the measurement utensil was examined and determined is engaged in to the specialty. The utility model has the advantages of small volume, simple operation and being suitable for being operated and used in a fume hood. When the verification procedure is executed for verification, one verification person can simultaneously perform verification work on 4 portable gas alarms or 4 fixed gas detectors under the self-powered condition of the verification device. The detected alarm is connected with the gas diffusion cover through a special connector, and the application of handheld operation, 4-path external gas supply channel design and a hand-pulling type quick cut-off valve is avoided when standard gas is introduced, so that the detection working efficiency is improved by 3 times compared with that under the prior art. Realized calibrating installation self safe power supply, avoided often needing external power supply box link in the present examination working process, saved operating time, the unexpected electric shock hidden danger of 220VAC power wiring when eliminating to connect, utility model's use purpose is the quick examination under the realization safety prerequisite. After the utility model is put into use, the real-time acquisition and display of ambient temperature, humidity, time and pressure parameters of the gas pipeline are realized; fast adjustment of standard gas flow; the standard gas output channel is rapidly started and stopped; the device may output 4-way 24VDC supply. Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses the design has 4 external gas supply channels, and all gas circuit pipelines and pneumatic equipment all adopt the formula connected mode of inserting soon, and more current device cutting ferrule formula connected mode has the installation and dismantles the convenience, sealed good, with low costs advantage.

2. The utility model provides a gas alarm calibrating installation is with gas circuit flow and power supply system rational arrangement in same box, has and controls the convenience, characteristics safe in utilization swiftly.

3. The calibrating device is provided with a temperature, humidity and time display instrument, has the advantages of real-time acquisition of environmental temperature and humidity indexes, visual and convenient digital display and avoids the defect of large reading error caused by the manual pointer instrument of the prior device.

4. The pressure gauge is arranged to monitor the actual pressure of the decompressed standard gas in real time; monitoring the storage amount of residual gas in the gas cylinder; and prompting a checker to close the gas cylinder main valve in time after the verification work is finished.

5. The utility model discloses 4 formula quick valves are drawn to hand in gas circuit part design installation, have the manual needle type valve of switching on, off swiftly rapidly than current device optional dress, the operating advantage of being convenient for.

6. The diffusion cover elastic force clamp type connection mode liberates both hands of the calibrating personnel and thoroughly comes out, reduces the labor intensity of the calibrating personnel, and improves the safety protection capability of the calibrating personnel on toxic gas.

7. The gas circuit part is provided with the gas-containing tank, so that the influence of pressure fluctuation of the conveying gas in the gas circuit on the verification process caused by first-order lag can be prevented.

8. The circuit part is provided with the leakage protector, so that the safety of verification personnel and equipment can be effectively protected.

9. The circuit part is designed and provided with a fuse, so that the damage of current to the detected instrument in overload can be prevented.

10. The design of box shell ground connection can prevent the injury to examination personnel when the shell is electrified.

11. 4 pairs of coaxial power sockets are designed and installed outside the box body, so that the detected instrument can be operated by quickly taking 24VDC power.

12. A ship-shaped power switch is arranged on the left side of the front panel, so that the 24VDC power supply can be switched on and off quickly.

13. The utility model discloses can use with the portable ventilation case combination of supporting design outside the laboratory.

14. The portable ventilation box can quickly evacuate toxic gas which is conveyed to the alarm by the diffusion cover connector connected with the gas circuit in the box.

15. The portable ventilation box upper portion is equipped with the wind vane, and the exhaust pipe can be placed according to the wind direction instruction to the examination personnel.

16. The portable ventilation box is provided with a rechargeable battery with a switch to supply power for the explosion-proof exhaust fan.

17. A lift-type transparent box cover is designed on the upper portion of the portable ventilation box, and internal conditions can be observed conveniently in real time.

18. The corrugated pipe matched with the portable ventilation box has the advantages of free length expansion and adjustment and portability.

Drawings

FIG. 1 is a block diagram of a prior art gas alarm calibration apparatus;

fig. 2 is a structural diagram of a gas circuit module of a gas alarm calibrating apparatus according to an embodiment of the present invention;

fig. 3 is a block diagram of a diffusion cover connector of a gas alarm calibration apparatus in an embodiment of the present invention;

fig. 4 is a block diagram of a circuit module of a gas alarm calibrating apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a practical application of a gas alarm calibrating apparatus according to an embodiment of the present invention;

FIG. 6 is a top view of a portable ventilation box in an embodiment of the present invention;

fig. 7 is a left side view of a portable ventilation box in an embodiment of the present invention;

fig. 8 is a structural diagram of an embodiment of a gas alarm calibrating apparatus according to the present invention.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

As shown in fig. 1, fig. 1 is a simplified diagram of a calibration apparatus used in most laboratories currently engaged in gas alarm calibration. The gas alarm calibrating device comprises a standard gas cylinder 1, a pressure reducing valve 2, a gas circuit module 3 and a gas alarm 4. During detection, standard gas in the standard gas bottle 1 is decompressed through the decompression valve 2, then is output through the gas transmission pipeline 3 and is transmitted to the detected gas alarm 4 to carry out detection.

Fig. 8 is a block diagram of a gas alarm verification device including a gas alarm verification module 71, a gas circuit module 3, a portable ventilation box 72, and a diffusion cover connector 73. The diffusion cover connector 73 is located in the portable ventilation box 72 and used for clamping the gas alarm 4 to be verified, and the gas alarm verification module 71 is connected to the gas alarm 4 to be verified through the gas circuit module 3 so as to verify the gas alarm 4.

When the verification work is carried out, the gas alarm verification module 71 is connected to the diffusion cover connector 73 which is positioned in the portable ventilation box 72 and clamps the gas alarm 4 through the gas circuit module 3, and when the verification work is carried out, the safe and efficient verification work is realized by controlling the gas alarm verification module 71 and the portable ventilation box 72.

Fig. 2 shows a structure diagram of a gas circuit module of a gas alarm calibrating apparatus of the present invention, fig. 2. The air circuit module consists of a through plate 21, a hand-pulling valve 22, a float flowmeter 23, an air container tank 24 and a pressure gauge 25. When the gas alarm is used for detection, standard gas is decompressed from a standard gas bottle 1 and then sent to a gas container tank-24, then the pressure is output in two paths, one path of the gas enters a pressure gauge 25 for pressure monitoring, the other path of the gas enters a hand-pull valve 22, the hand-pull valve 22 is controlled to be opened, the standard gas enters a float flowmeter 23 for flow control, and the standard gas after flow adjustment is sent out from a through plate 21 to the gas alarm 4.

Fig. 3 shows a general design of the hands-free ventilation diffusion cover connector, which is composed of a base plate 31, a spring 32, a diffusion cover 33, a movable plate 34 and a slide rail beam 35. When the gas circuit module is used, the gas circuit module 3 is connected with the diffusion cover 33, the movable plate 34 connected with the spring 32 is pulled outwards along the slide rail beam 35, the alarm 4 to be detected is placed on the base plate 31, the movable plate 34 is loosened, and the diffusion cover 33 is connected with the gas alarm 4 to be detected under the action of the elastic force of the spring 32.

Fig. 5 shows a diagram of a practical application of a gas alarm calibrating device. The calibrating personnel executes the calibration procedure, reduces the pressure of the standard gas in the standard gas cylinder 1 to the specified pressure, and then sends the standard gas into the calibrating device through the plate through 21 from the back of the device. The temperature, humidity and time instrument 51 collects relevant data, and a verification worker connects 4 detected alarms 4 with the gas circuit 3 connected with the through-plate through-hole 21 in the front of the device, the diffusion cover 33, the diffusion cover connector and the coaxial socket 47 in the front of the device to lead out a power line 48 to be connected with the verification device. After the examiner controls the manual switch 44 to supply 24VDC to the alarm 4 to be examined, the examiner performs the examination work by controlling the pull valve 22 and the float flowmeter 23.

Referring to fig. 6 and 7, a design of portable ventilation box 71, when portable ventilation box 71 is used outside a laboratory, handles 612 on both sides of the box are grasped to carry and place ventilation box 71, and box 71 is stably placed by adjusting the height of box foot 613. The handle 66 is grasped to open the transparent flap 67 with the movable shaft 63, and the alarm 4 is placed in the case 71 and clamped by the diffusion cover connector. The air path module 3 is led out from a through plate 21 of a gas alarm calibrating device, penetrates through the air path through hole 61 and is connected with a diffusion cover connector 73 in the box 71, before calibrating work is carried out, the corrugated pipe 62 is stretched according to the indication of a wind vane 68 on the upper part of the box 71, and an air outlet is arranged at a correct position. The transparent movable cover plate 67 is covered after the inspection, the power supply is provided through the power line 64 by pressing the key switch 65 of the rechargeable battery 69, the exhaust fan 611 is started, the external air is pumped into the box 71 through the vent hole 610 and is rapidly exhausted through the corrugated pipe 62 after being mixed with the air in the box 71, and the air then enters the verification working link.

Fig. 4 shows a circuit design diagram of a gas alarm calibrating device, which is composed of an alternating current power supply 41, a leakage protector 42, a transformer 43, a manual switch 44, a fuse 45, a terminal strip 46, a coaxial socket 47 and a power line 48.

When the gas alarm needs 24CDC power supply, a 24VDC positive and negative power line 48 is connected with the alarm 4 to be detected, a manual switch 44 is turned on, and 220VAC introduced by an alternating current power supply 41 is finally connected with the alarm 4 to be detected through a power line 48 by passing through a leakage protector 42, a transformer 43, a breaker 45, a terminal row 46 and a transmission coaxial socket 47.

The utility model discloses a gas alarm calibrating installation is when the operation, and the standard gas after to the regulated pressure will decompress, send to through the dedicated connection pipeline the utility model discloses a gas alarm calibrating installation gas container jar 24, gas divide two tunnel to send to calibrating installation gas transmission pipeline respectively on installation stainless steel shock-proof pressure gauge 25 and 4 float flowmeter 23, 4 the accurate gas of road sign send to hand-pulling type quick cut-off valve 22 after flow adjustment control again before, the last calibrating personnel pass through the standard gas after operating the hand-pulling type quick cut-off valve with flow adjustment, through 4 only wear the straight 21 transport of board to being examined 4 on the gas alarm. In the verification process, a verification worker can master environmental temperature, humidity and time parameters in real time through a temperature, humidity and time instrument arranged on a panel of the verification device. The gas alarm to be detected, which needs to supply 24VDC power supply, can directly get electricity from the calibrating device.

The utility model discloses a gas alarm calibrating installation when improving 3 times examination work efficiency, very big reduction examination personnel intensity of labour has reduced occupational disease danger risk. The gas alarm calibration process is convenient, fast, safe and efficient, and an ideal use effect is obtained.

Claims

1. The utility model provides a gas alarm calibrating installation, its characterized in that, includes gas alarm verification module, gas circuit module, portable ventilation case, diffusion cover connector is located in the portable ventilation incasement for the gas alarm that the examination was waited to the centre gripping, gas alarm verification module passes through the gas circuit module is connected in the gas alarm of waiting to examine and determine.

2. The gas alarm calibrating device according to claim 1, wherein the diffusion cover connector comprises a base plate, a spring, a diffusion cover, a movable plate and a slide rail beam, the slide rail beam is located above the base plate, the slide rail beam is provided with a U-shaped groove, the spring is located inside the U-shaped groove of the slide rail beam, one end of the spring is connected with the base plate, the other end of the spring is connected with the movable plate, the movable plate is connected with the spring, the diffusion cover penetrates through a through hole of the movable plate through a tail air tap and is installed on the lower side of the movable plate in an interference fit mode with the through hole of the movable plate, and the diffusion cover is externally connected with the gas circuit module.

3. The gas alarm calibrating device according to claim 1, wherein the portable ventilation box comprises a gas path passing hole, a transparent removable cover plate with a movable shaft, a corrugated pipe, a wind vane, a ventilation hole and an exhaust fan, the wind vane is located on the upper portion of the box body of the portable ventilation box, the exhaust fan is installed on the upper portion of the box plate on the right side of the portable ventilation box, the corrugated pipe is connected with the air outlet of the exhaust fan in an interference fit mode, the ventilation hole is located on the upper portion of the box plate on the left side of the portable ventilation box, the gas path module passes through the gas path passing hole and is connected with the diffusion cover connector in the portable ventilation box, and the transparent removable cover plate with the movable shaft is installed on the top of the portable ventilation box.

4. The calibrating apparatus for gas alarm equipment according to claim 3, wherein said portable ventilation box comprises a rechargeable battery and a key switch, said rechargeable battery is connected to said key switch, said key switch is connected to said exhaust fan.

5. The calibrating device for the gas alarm device according to claim 1, wherein the gas circuit module comprises a through plate, a hand-operated valve, a float flowmeter, a gas-containing tank and a pressure gauge, the gas-containing tank is connected to a standard gas cylinder to receive standard gas, the pressure gauge is connected to the gas-containing tank, the through plate, the hand-operated valve and the float flowmeter are respectively provided with a plurality of gas-containing tanks, and a single through plate, the hand-operated valve and the float flowmeter are connected to the gas-containing tank after being sequentially connected.

6. The gas alarm verification device according to claim 1, further comprising a temperature and humidity time meter, wherein the temperature and humidity time meter is mounted on the upper left portion of the panel of the gas alarm verification module.

7. The calibrating device for the gas alarm of claim 1, further comprising a circuit module, wherein the circuit module comprises an alternating current power supply, a leakage protector, a transformer, a manual switch, a fuse, a terminal strip and a coaxial socket which are sequentially connected, and the coaxial socket is connected to the gas alarm to be calibrated.