CN210719694U

CN210719694U - Overpressure exhaust valve detection device

Info

Publication number: CN210719694U
Application number: CN201921802230.4U
Authority: CN
Inventors: 李德胜; 崇海波; 仰宗年
Original assignee: Anhui Civil Defense Engineering Quality Inspection Center
Current assignee: Anhui Civil Defense Engineering Quality Inspection Center
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-09
Anticipated expiration: 2029-10-24

Abstract

The utility model relates to the field of civil air defense engineering equipment, and discloses an overpressure exhaust valve detection device, which comprises an air collection chamber, a fan, an air pipe connected with the fan and the air collection chamber, wherein the air collection chamber is provided with a mounting groove; a sealing door is arranged at the mounting groove, an exhaust valve is arranged on the sealing door, and a sealing frame is arranged on one side of the sealing door close to the inside of the gas collection chamber; the sealing frame is provided with a sealing strip which is attached to the groove wall of the mounting groove; one side of the sealing door is hinged with the outer wall of the gas collection chamber; the outer wall of the sealing frame is provided with a connecting plate; the connecting plate is arranged along the outer wall of the sealing frame; a sealing sleeve is arranged on the connecting plate; a sealing ring which is abutted with the outer wall of the gas collection chamber is arranged on one side of the sealing sleeve, which is close to the outer wall of the gas collection chamber; the inside of sealing washer is equipped with the hollow layer. The utility model has the advantages of it is following and effect: the accuracy of the measurement result is high.

Description

Overpressure exhaust valve detection device

Technical Field

The utility model relates to a civil air defense engineering equipment field, in particular to superpressure exhaust valve detection device.

Background

The overpressure exhaust valve has the advantages of simple structure, attractive appearance, advanced technology and reliable function, and is indispensable protective equipment for a toxic filtering and ventilating system of a protective project. The explosion-proof overpressure exhaust valve is adopted, an exhaust system consisting of an original common explosion-proof wave valve, an automatic exhaust wave-eliminating active gas and an automatic exhaust valve can be directly replaced, and the valve can also be independently used as the overpressure exhaust valve, is indispensable protective equipment in modern protective engineering, and has two functions: 1. the valve is automatically opened and closed by the difference between the air pressure inside and outside the valve so as to ensure good ventilation inside the engineering; 2. when the explosion shock wave comes, the valve is automatically closed instantly to play the role of explosion wave prevention. It is therefore desirable to develop a platform for detecting the performance of the vent valve. The overpressure exhaust valve detection device mainly comprises a gas collection chamber, a fan, a valve disc, a lever, a heavy hammer, an eccentric wheel and a tripbar, wherein the valve disc can directly bear the pressure effect of pressure waves and can be arranged on an outer wall of a low-resistance project to replace an exhaust explosion wave-proof valve, so that the overpressure exhaust valve is called an explosion wave-proof overpressure automatic exhaust valve.

At present, the chinese utility model patent with publication number CN106855457A discloses an overpressure exhaust valve aerodynamic curve detection device, which comprises a variable frequency fan, a square variable circular tube, a first connecting pipe, a first measuring air pipe, a pore plate, a second measuring air pipe, a second connecting pipe and a static pressure box, which are connected in sequence; a first grid is arranged in the first connecting pipe; static pressure holes are formed in the first measuring air pipe and the second measuring air pipe; a second grid is arranged between the second connecting pipe and the static pressure box; the static pressure box is provided with a movable door, the movable door is provided with an overpressure exhaust valve, and the overpressure exhaust valve is fixed through a vertical clamp; a plurality of static pressure holes are uniformly distributed in the static pressure box, and the static pressure holes are connected together through silicone tubes.

The technical scheme has simple structure and low manufacturing cost, but has the following defects: the sealing performance between the movable door and the static pressure box is not high, so that gas leakage is easily caused, the gas pressure value in the static pressure box is reduced, and the measurement accuracy is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing an superpressure exhaust valve detection device, its measuring result's accuracy is high.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the overpressure exhaust valve detection device comprises a gas collection chamber, a fan, and a wind pipe connected with the fan and the gas collection chamber, wherein the gas collection chamber is provided with a mounting groove; a movable door is arranged at the mounting groove, an exhaust valve is arranged on the movable door and comprises a valve and a valve disc, the valve is arranged on the movable door, the valve disc is arranged in the valve, and a sealing frame is arranged on one side of the movable door close to the inside of the gas collection chamber; a circle of sealing strips attached to the mounting groove are arranged on the sealing frame; one side of the movable door is hinged with the outer wall of the gas collection chamber; the outer wall of the sealing frame is provided with a connecting plate; the connecting plate is arranged along the outer wall of the sealing frame; a sealing sleeve is arranged on the connecting plate; a sealing ring which is abutted against the outer wall of the gas collection chamber is arranged on one side of the sealing sleeve, which is close to the outer wall of the gas collection chamber; the inside of sealing washer is equipped with the cavity layer.

Through adopting above-mentioned technical scheme, improved the leakproofness of dodge gate and collection chamber for when the dodge gate was closing, the inside gas of whole collection chamber is difficult for revealing, can accurately make exhaust valve action through the increase of gas pressure, thereby measure the size of the volume of airing exhaust according to the pressure that promotes exhaust valve and open, and holistic measurement accuracy is high.

When closing the dodge gate, the sealing strip on the sealed frame is located the butt with the mounting groove of plenum chamber to form one sealed, because dodge gate one side sets up with the plenum chamber is articulated, make the leakproofness of articulated department not high, increase the sealing washer in sealed frame department, the inside hollow layer that is equipped with of sealing washer makes the outer wall butt of sealing washer and plenum chamber, thereby it is sealed to form the second way, makes the leakproofness of dodge gate and plenum chamber high, is difficult for causing gas leakage.

The utility model is further provided with that the air pipe comprises a first pipeline and a second pipeline; a vortex street type flowmeter is connected between the first pipeline and the second pipeline; one end of the first pipeline is connected with the soft-connection reducing taper pipe, and the other end of the first pipeline is connected with one side of the vortex street type flowmeter; one end of the second pipeline is connected with the other side of the vortex street type flowmeter, and the other end of the second pipeline is communicated with the gas collection chamber.

Through adopting above-mentioned technical scheme, vortex street formula flowmeter can integrate temperature and pressure compensation function simultaneously, but measuring body's standard volume flow or standard mass flow for flow measurement to gas is more accurate reliable, and the detection sensor direct contact is surveyed the gaseous medium, and the stable performance, longe-lived, the working costs is low, has energy-conserving effect.

The utility model discloses further set up as, the top of collection chamber is equipped with the relief valve.

Through adopting above-mentioned technical scheme, set up the relief valve, avoid exhaust valve to damage and can not work for the valve disc can not open, and leads to the collection chamber internal pressure too big, when collection chamber internal pressure reached the highest value that the relief valve set for, can automatic pressure release, in order to guarantee detection device's security performance.

The utility model discloses further set up to, the wind gap department of fan is connected with the rectification bars.

By adopting the technical scheme, the guide vanes which are arranged in a staggered mode are arranged in the rectifying grid, so that fluid can stably and orderly pass through the guide vanes, the disturbance of airflow to the fan blades is reduced, and the pressure loss caused by the turning of the airflow is reduced. Break up the amount of wind that gets into measuring device through the rectifier grating, because the amount of wind of fan advances along the blast pipe wall after getting into the measurement tuber pipe, still probably forms the swirl, breaks up with the grid, just so can measure in the tuber pipe and the gas collecting chamber incasement accurate pressure value, has improved measuring result's precision for measuring effect is better.

The utility model is further arranged that a sealing groove is arranged at the position of the gas collection chamber corresponding to the sealing ring; and an elastic part used for abutting the sealing ring with the groove wall of the sealing groove is arranged in the sealing ring.

Through adopting above-mentioned technical scheme, set up the seal groove for the area of contact of sealing washer and plenum is bigger, sets up the elastic component, makes the sealing washer can keep with the butt of the cell wall of seal groove, improves sealing performance, makes gaseous being difficult for revealing from the crack of dodge gate, thereby makes detection device's testing result accuracy nature higher.

The utility model discloses further set up to, first pipeline and second pipeline are close to the position of vortex street formula flowmeter and are equipped with the pipe bracket.

Through adopting above-mentioned technical scheme, set up pipeline bracket, improve the support of the pipeline of being connected with vortex street formula flowmeter, can carry out effectual shock attenuation to the position that first pipeline and second pipeline are close to vortex street formula flowmeter, further improve the accuracy that vortex street formula flowmeter detected.

The utility model is further provided with that the pipeline bracket comprises a base and a fixed sleeve arranged above the base; the fixing sleeve comprises a first half ring and a second half ring hinged with one side of the first half ring; the first half ring and the second half ring are symmetrically arranged; mounting blocks are formed at the end parts of the first half ring and the second half ring, which are far away from the hinged part of the first half ring and the second half ring; the two mounting blocks are fixed through bolts; the bottom of the second half ring is provided with an installation rod; the bottom end of the mounting rod is fixed above the base; the first semi-ring and the second semi-ring inside wall in opposite directions all are equipped with the rubber pad.

Through adopting above-mentioned technical scheme, place the tuber pipe on the second semi-ring, close first semi-ring lid again on the tuber pipe for the installation piece laminating on first semi-ring and the second semi-ring is fixed first semi-ring and second semi-ring through the bolt, thereby can fix first semi-ring and second semi-ring. The bottom of the second half ring is provided with the mounting rod and the fixing barrel and is connected with the spring of the mounting rod and the fixing barrel, so that the vibration of the pipeline can be effectively reduced, the pipeline can be more stably mounted, and the measurement accuracy is improved. The rubber pad is arranged, so that the clamping of the pipeline is improved, the pipeline is not prone to vibration, and in addition, certain buffering effect can be achieved on the shaking of the pipeline.

The utility model is further provided with a clamping groove at one side of the valve close to the movable door; and a sealing gasket attached to the valve disc is arranged at the clamping groove.

By adopting the technical scheme, the sealing gasket is added between the valve and the valve disc, so that the tightness of the exhaust valve is ensured, and the detection accuracy is improved; meanwhile, when impact force towards the inside of the air collection chamber is applied to the valve disc by external impact, the air collection chamber has a buffering effect on the exhaust valve, so that the exhaust valve is firm in structure and not easy to damage.

To sum up, the utility model discloses a beneficial technological effect does:

the tightness of the movable door and the gas collection chamber is improved, so that when the movable door is closed, gas in the whole gas collection chamber is not easy to leak, the exhaust valve can accurately act through the increase of gas pressure, the exhaust volume is measured according to the pressure for pushing the exhaust valve to open, and the overall measurement accuracy is high;

the air quantity entering the measuring device is scattered through the rectifying grids, and the air quantity of the fan advances along the wall of the air duct after entering the measuring air duct, so that a vortex is possibly formed, and the grid is used for scattering, so that the accurate pressure values in the air duct and the gas collecting chamber can be measured, the accuracy of the measuring result is improved, and the measuring effect is better;

the vortex street type flowmeter can integrate the temperature and pressure compensation function at the same time, can measure the standard volume flow or the standard mass flow of fluid, and has more accurate and reliable flow measurement of gas, stable performance and no direct contact between a detection sensor and a measured gas medium.

Drawings

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

FIG. 2 is a schematic view of an exhaust valve mounting structure of the embodiment;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is an enlarged schematic view at B in FIG. 2;

FIG. 5 is a schematic view of a pipe rack configuration of an embodiment.

Reference numerals: 1. a gas collection chamber; 11. a safety valve; 12. an exhaust valve; 121. a valve; 122. a valve disc; 123. a card slot; 124. a gasket; 13. mounting grooves; 14. a sealing groove; 2. a fan; 21. a rectifying grid; 22. soft-connecting the variable-diameter taper pipe; 23. a vortex shedding flowmeter; 24. an air duct; 241. a first conduit; 242. a second conduit; 3. a movable door; 31. a sealing frame; 311. a sealing strip; 32. a connecting plate; 321. sealing sleeves; 322. a seal ring; 323. a hollow layer; 33. an elastic member; 331. a spring; 332. an elastic sheet; 4. a pipe support; 41. a base; 42. fixing a sleeve; 421. a first half ring; 422. a second half ring; 423. mounting blocks; 43. mounting a rod; 44. a rubber pad; 5. a support; 51. a shock pad; 6. a fixing frame.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the overpressure exhaust valve detection device includes a gas collection chamber 1 and a fan 2.

The top of the gas collection chamber 1 is provided with a safety valve 11. Mounting groove 13 has been seted up to one side that collection chamber 1 deviates from fan 2, and mounting groove 13 department installs dodge gate 3. One side of the movable door 3 in the thickness direction is hinged with the outer wall of the gas collection chamber 1. The movable door 3 is provided with an exhaust valve 12.

As shown in fig. 2, the exhaust valve 12 includes a valve 121 fixed to the movable door 3, and a valve disc 122 movably mounted on the valve 121. Referring to fig. 3, a clamping groove 123 is formed in one side of the valve 121 close to the movable door 3 (shown in fig. 2), and a sealing gasket 124 attached to the valve disc 122 is bonded to the clamping groove 123.

As shown in fig. 4, a sealing frame 31 is formed on the side surface of the movable door 3 close to the inside of the plenum 1, and a sealing strip 311 closely attached to the mounting groove 13 is mounted on the outer side wall of the sealing frame 31. The outer wall of the sealing frame 31 is welded with a connecting plate 32, and the connecting plate 32 is arranged along the outer wall of the sealing frame 31. A sealing sleeve 321 is bonded on the connecting plate 32, and a sealing ring 322 is formed on one side of the sealing sleeve 321 close to the outer wall of the gas collecting chamber 1. One side of the sealing ring 322 departing from the movable door 3 is abutted against the outer wall of the gas collection chamber 1, and a hollow layer 323 is arranged inside the sealing ring 322. The elastic part 33 is installed inside the sealing ring 322, the elastic part 33 is preferably a spring 331 and an elastic sheet 332, the spring 331 extends from the side of the sealing ring 322 close to the sealing sleeve 321 to the side away from the sealing sleeve 321, and the elastic sheet 332 is fixed at the end of the spring 331 away from the sealing sleeve 321. The spring 331 and the elastic sheet 332 are both located within the hollow layer 323. The position of the gas collection chamber 1 corresponding to the sealing ring 322 is provided with a sealing groove 14, the width of the notch of the sealing groove 14 is greater than the width of the groove bottom of the sealing groove 14, and the width of the elastic sheet 332 is less than the width of the notch of the sealing groove 14. When the movable door 3 is closed, the sealing ring 322 is abutted against the groove wall of the sealing groove 14 by the combined action of the elastic piece 332 and the spring 331.

As shown in fig. 1, the fan 2 is fixed on the bracket 5, and a shock pad 51 is adhered to the bottom of the bracket 5 for reducing the vibration of the fan 2. The air inlet of the fan 2 is fixedly connected with a rectifying grid 21, and one end of the rectifying grid 21 departing from the fan 2 is fixedly connected with a soft-connection reducing taper pipe 22. An air pipe 24 is fixedly connected to one end of the flexible connection reducing taper pipe 22, which is far away from the rectifying grating 21. The air duct 24 is horizontally disposed, and the air duct 24 includes a first duct 241 and a second duct 242. A vortex flowmeter 23 is connected between the first pipe 241 and the second pipe 242. The vortex flowmeter 23 is supported by the fixing frame 6. One end of the first pipeline 241 is connected with the soft-connection reducing taper pipe 22, the other end of the first pipeline 241 is connected with one side of the vortex-street type flowmeter 23, one end of the second pipeline 242 is connected with the other side of the vortex-street type flowmeter 23, and the other end of the second pipeline 242 is communicated with the inside of the gas collection chamber 1. The first pipe 241 and the second pipe 242 are each provided with a pipe bracket 4 at a position close to the vortex flowmeter 23.

Referring to fig. 5, the pipe bracket 4 includes a base 41 and a fixing sleeve 42 fixed above the base 41. The fixing sleeve 42 includes a first half ring 421 and a second half ring 422 hinged to one side of the first half ring 421. The first half ring 421 and the second half ring 422 are symmetrically arranged, the end parts of the first half ring 421 and the second half ring 422 departing from the hinged parts of the first half ring 421 and the second half ring 422 are respectively provided with a mounting block 423 in a forming mode, after the first half ring 421 and the second half ring 422 are covered, the two mounting blocks 423 are fixed through bolts, and therefore the first pipeline 241 and the second pipeline 242 are fixedly supported. The bottom of the second half ring 422 is formed with a mounting rod 43, the bottom end of the mounting rod 43 is fixed above the base 41, and rubber pads 44 are adhered to the opposite inner side walls of the first half ring 421 and the second half ring 422.

When the movable door is used, the movable door 3 is firstly locked, the sealing strip 311 is tightly attached to the wall of the mounting groove 13 to form a first seal, and the sealing ring 322 is abutted to the sealing groove 14 to form a second seal. The fan 2 is started, gas blown out by the fan 2 is rectified through the rectifying grid 21, is transmitted to the vortex flow meter 23 through the air pipe 24 for detection feedback, and then flows into the gas collection chamber 1, and after the air pressure in the gas collection chamber 1 reaches the opening pressure of the exhaust valve 12, the valve disc 122 is pushed open, so that the gas in the gas collection chamber 1 can be discharged, and a detection result with high accuracy can be obtained.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The overpressure exhaust valve detection device comprises a gas collection chamber (1), a fan (2) and a wind pipe (24) connected with the fan (2) and the gas collection chamber (1), wherein a mounting groove (13) is formed in the gas collection chamber (1); mounting groove (13) department is equipped with dodge gate (3), be equipped with exhaust valve (12) on dodge gate (3), exhaust valve (12) are including valve (121) and valve disc (122), valve (121) are located on dodge gate (3), valve disc (122) are located in valve (121), characterized by: a sealing frame (31) is arranged on one side of the movable door (3) close to the interior of the gas collection chamber (1); a circle of sealing strips (311) attached to the mounting groove (13) are arranged on the sealing frame (31); one side of the movable door (3) is hinged with the outer wall of the gas collection chamber (1); the outer wall of the sealing frame (31) is provided with a connecting plate (32); the connecting plate (32) is arranged along the outer wall of the sealing frame (31); a sealing sleeve (321) is arranged on the connecting plate (32); a sealing ring (322) which is abutted against the outer wall of the gas collection chamber (1) is arranged on one side, close to the outer wall of the gas collection chamber (1), of the sealing sleeve (321); and a hollow layer (323) is arranged inside the sealing ring (322).

2. A device for detecting an overpressure vent valve as set forth in claim 1, characterized in that: the air duct (24) comprises a first duct (241), a second duct (242); a vortex street type flowmeter (23) is connected between the first pipeline (241) and the second pipeline (242); one end of the first pipeline (241) is connected with the soft-connection reducing taper pipe (22), and the other end of the first pipeline (241) is connected with one side of the vortex street type flowmeter (23); one end of the second pipeline (242) is connected with the other side of the vortex street type flowmeter (23), and the other end of the second pipeline (242) is communicated with the inside of the gas collection chamber (1).

3. A device for detecting an overpressure vent valve as set forth in claim 1, characterized in that: the top of the gas collection chamber (1) is provided with a safety valve (11).

4. A device for detecting an overpressure vent valve as set forth in claim 1, characterized in that: and the air port of the fan (2) is connected with a rectifying grid (21).

5. A device for detecting an overpressure vent valve as set forth in claim 1, characterized in that: a sealing groove (14) is formed in the position, corresponding to the sealing ring (322), of the gas collection chamber (1); an elastic piece (33) used for enabling the sealing ring (322) to be abutted against the groove wall of the sealing groove (14) is arranged in the sealing ring (322).

6. A device for detecting an overpressure vent valve as set forth in claim 2 wherein: and the first pipeline (241) and the second pipeline (242) are provided with pipeline supports (4) at positions close to the vortex street type flowmeter (23).

7. An overpressure vent valve detection apparatus as set forth in claim 6 wherein: the pipeline bracket (4) comprises a base (41) and a fixed sleeve (42) arranged above the base (41); the fixed sleeve (42) comprises a first half ring (421) and a second half ring (422) hinged with one side of the first half ring (421); the first half ring (421) and the second half ring (422) are symmetrically arranged; the end parts of the first half ring (421) and the second half ring (422) departing from the hinged part of the first half ring and the second half ring are both provided with a mounting block (423) in a molding way; the two mounting blocks (423) are fixed through bolts; the bottom of the second half ring (422) is provided with a mounting rod (43); the bottom end of the mounting rod (43) is fixed above the base (41); the opposite inner side walls of the first half ring (421) and the second half ring (422) are provided with rubber pads (44).

8. A device for detecting an overpressure vent valve as set forth in claim 1, characterized in that: a clamping groove (123) is formed in one side, close to the movable door (3), of the valve (121); and a sealing gasket (124) attached to the valve disc (122) is arranged at the clamping groove (123).