Device for detecting air leakage rate of fireproof valve

Abstract

The utility model discloses a fireproof valve air leakage rate detection device which comprises a frequency conversion centrifugal fan, the frequency conversion centrifugal fan is installed at one end of the top of a bottom frame, an adjusting air inlet valve is installed at the air inlet end of the frequency conversion centrifugal fan, and meanwhile a door frame is installed at the top of the bottom frame. A connecting air pipe is installed on the top of the frequency conversion centrifugal fan, the top of the connecting air pipe is connected with the bottom of the static pressure box, and meanwhile the static pressure box is arranged above the bottom frame. A micromanometer is mounted on the static pressure box; the whole device is compact in structure, the bottom frame and the door frame are both made of stainless steel materials, a carrier of the device is formed through welding, electric power assistance is carried out through cooperation of the four idler wheels and the driving module, the whole device can be transferred through single-person operation, the size of the whole device is 1700 * 1300 * 1900 mm, the whole device can enter a common elevator conveniently, and the whole device is convenient to use. And the convenience of the whole device during transferring and conveying is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fire damper detection equipment, specifically a fire damper air leakage rate detection equipment. BACKGROUND

[0002] The fire damper detection equipment is a professional equipment for testing and evaluating the performance of the fire damper, which plays a crucial role in the safety and reliability evaluation of the fire-fighting equipment. These devices can simulate various conditions under fire scenarios and accurately measure and evaluate the key indicators of the fire damper, such as fire resistance, air leakage, and smoke leakage. The airtightness of the fire damper, smoke exhaust fire damper, and smoke exhaust valve is particularly important for blocking smoke during system operation. If the air leakage of the above-mentioned valves is greater than the allowable value, it will result in a smoke exhaust volume and smoke supply volume that is less than the design requirement, indirectly reducing the safety of personnel evacuation in fire situations. Referring to the publication number "CN209707020U", the disclosed "fire damper air leakage detection device" includes a combustion furnace, a hot gas extraction detection piece, and a to-be-tested fire damper connected between the combustion furnace and the hot gas extraction detection piece. The connection end of the to-be-tested fire damper is provided with a connecting convex edge. The air outlet end of the combustion furnace is connected with a circular connector. The air outlet end of the circular connector is connected with a transition connecting pipe through a combination piece one. The transition connecting pipe includes a connecting circular pipe connected with the circular connector and a transition square pipe connected with the connecting convex edge of the to-be-tested fire damper through a combination piece two, achieving the purpose of installing different sizes of to-be-tested fire dampers on the hot gas extraction detection piece.

[0003] However, the current fire damper air leakage rate detection equipment is usually large in size and cannot be moved freely after completion of construction. Especially when the fire damper needs to be detected on the construction site, the traditional fire damper air leakage rate detection equipment cannot be quickly constructed on the construction site, thus having the use drawbacks. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a fire damper air leakage rate detection equipment to solve the problem of the current fire damper air leakage rate detection equipment being usually large in size and not movable, which cannot be quickly detected on the construction site.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A fire damper air leakage rate detection equipment includes a variable frequency centrifugal fan. The variable frequency centrifugal fan is installed at one end of the top of the chassis, and the air inlet end of the variable frequency centrifugal fan is installed with an air inlet regulating valve. Meanwhile, a portal frame is installed on the top of the chassis. A connecting air pipe is installed on the top of the variable frequency centrifugal fan, and the top of the connecting air pipe is connected with the bottom of a static pressure tank. Meanwhile, the static pressure tank is arranged above the chassis. A micro pressure gauge is installed on the static pressure tank.

[0007] As a further scheme of the utility model: the air outlet end of the fireproof valve is equipped with a terminal air pipe, and a DN40 flow hole is formed in the terminal air pipe; the terminal air pipe is equipped with an anemograph, and the anemograph is in communication with the DN40 flow hole; the adapter air pipe is erected at one end of the top of the portal.

[0008] As a further scheme of the utility model: the bottom of the chassis is symmetrically equipped with two groups of rollers, and each group of rollers is symmetrically provided with two rollers, and a transmission shaft is arranged between the two rollers close to the variable frequency centrifugal fan.

[0009] As a further scheme of the utility model: the bottom of the chassis is symmetrically equipped with two groups of rollers, and each group of rollers is symmetrically provided with two rollers, and a transmission shaft is arranged between the two rollers close to the variable frequency centrifugal fan.

[0010] As a further scheme of the utility model: the bottom of the chassis is symmetrically equipped with two groups of rollers, and each group of rollers is symmetrically provided with two rollers, and a transmission shaft is arranged between the two rollers close to the variable frequency centrifugal fan.

[0011] As a further scheme of the utility model: the bottom of the chassis is symmetrically equipped with two groups of rollers, and each group of rollers is symmetrically provided with two rollers, and a transmission shaft is arranged between the two rollers close to the variable frequency centrifugal fan.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1. The utility model is provided with a chassis, a portal and a driving module, the whole device structure is compact, the chassis and the portal are made of stainless steel material, the carrier of the device is formed by welding, and the four rollers and the driving module are matched to realize electric power assistance, one person can complete the transfer of the whole device, the size of the whole device is 1700*1300*1900mm, the whole device can enter the inside of a common elevator, and the convenience of the whole device during transfer and transportation is improved.

[0014] 2. The utility model, be provided with variable frequency centrifugal fan and adjust inlet valve, according to GB15930 test requirement, smoke valve requirement is 1000Pa plus or minus 15Pa, and fire damper, smoke fire damper requirement is 300Pa plus or minus 15Pa, and the working environment pressure of different valve is different, and variable frequency centrifugal fan adopts 0-50Hz global frequency conversion, realizes precision regulation, according to fan characteristic curve, variable frequency centrifugal fan with the decrease of air volume will increase total pressure, utilize the regulating inlet valve as throttling device and promote internal pressure, so that the device can pass through single variable frequency centrifugal fan cooperation regulating inlet valve, can simulate multiple performance curves, provide extensive pressure coverage, and then simulate the use environment of various smoke valve, fire damper or smoke fire damper, improve the overall application range of device.

[0015] 3. The utility model, be provided with anemograph and DN40 flow hole, when testing the fire damper needed to test, the wind speed value at DN40 flow hole can be obtained quickly through anemograph, then cooperate formula: air leakage = (DN40 flow hole) wind speed * DN40 flow hole cross section area, can obtain the air leakage of the fire damper tested currently quickly, compared with the more complicated in national standard specification, and need to carry out multiple static pressure and air volume conversion relation calculation mode, adopt the original calculation formula of air volume = wind speed * cross section area, simplify the air leakage calculation process of fire damper, directly calculate air leakage rate, improve the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0017] Figure 2 It is another perspective view of the utility model Figure 1 .

[0018] Figure 3 It is another perspective view of the utility model Figure 2 .

[0019] Figure 4 It is another perspective view of the utility model Figure 3 .

[0020] Figure 5 It is the three-dimensional structure schematic diagram of the utility model in drive module.

[0021] In the drawing: 1-variable frequency centrifugal fan, 2-adjust inlet valve, 3-connecting air pipe, 4-static pressure tank, 5-micro pressure gauge, 6-connecting hose, 7-adapting air pipe, 8-fire damper, 9-end air pipe, 10-anemograph, 11-DN40 flow hole, 12-bottom frame, 13-gantry, 14-baffle, 15-control box, 16-handrail, 17-roller, 18-drive module, 1801-battery, 1802-electric wheel, 19-transmission shaft. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] Please refer to Figures 1-5 In the embodiments of the utility model, a fire damper air leakage rate detection equipment, including variable frequency centrifugal fan 1, variable frequency centrifugal fan 1 is installed at the top of the chassis 12 one end, and the air inlet end of variable frequency centrifugal fan 1 is equipped with adjusting air inlet valve 2, and the top of chassis 12 is equipped with portal frame 13;Variable frequency centrifugal fan 1's top is equipped with connecting air pipe 3, and the top of connecting air pipe 3 is connected with the bottom of static pressure tank 4, and static pressure tank 4 is arranged above the chassis 12;The static pressure tank 4 is equipped with micro pressure gauge 5;The air outlet end of static pressure tank 4 is equipped with connecting hose 6, and the end of connecting hose 6 is connected with adapter air pipe 7, and the air outlet end of adapter air pipe 7 is equipped with fire damper 8;The air outlet end of fire damper 8 is equipped with end air pipe 9, and DN40 flow hole 11 is formed in end air pipe 9;The end air pipe 9 is equipped with anemometer 10, and anemometer 10 is communicated with DN40 flow hole 11;Adapter air pipe 7 is erected at the top of portal frame 13 one end.

[0024] Specifically, fire damper 8 and adapter air pipe 7 and end air pipe 9 are connected by flange bolts, and soft padding is added between fire damper 8 and adapter air pipe 7 and end air pipe 9 to increase air tightness, and aluminum foil tape is used outside the connection to increase air tightness.

[0025] As a further description of the embodiment, micro pressure gauge 5 is used to read the static pressure value provided by variable frequency centrifugal fan 1 during the test to meet the test requirements.

[0026] In the embodiment, the bottom of the chassis 12 is symmetrically distributed and equipped with two groups of rollers 17, and each group of rollers 17 is symmetrically distributed and equipped with two, and a transmission shaft 19 is installed between the two rollers 17 close to the variable frequency centrifugal fan 1 end.

[0027] Specifically, the whole device is supported by the rollers 17 contacting the ground, and the two rollers 17 away from the handrails 16 end can rotate freely within a certain range, which is convenient for adjusting the direction of the device.

[0028] As a further illustration of the embodiment, the moving direction of the two rollers 17 connected to the ends of the transmission shaft 19 is fixed, which improves the controllability of the direction of the device when moving.

[0029] In the embodiment, the bottom of the chassis 12 is provided with a drive module 18 near one end of the variable frequency centrifugal fan 1, and the drive module 18 is electrically connected with the control box 15.

[0030] Specifically, the drive module 18 is controlled by the control box 15.

[0031] As a further illustration of the embodiment, the control box 15 is located above the handrail 16, which is convenient for the operator to use.

[0032] In the embodiment, the portal frame 13 is provided with a baffle 14 near the upper portion of one side of the variable frequency centrifugal fan 1, and the control box 15 is installed on the baffle 14; the baffle 14 is provided with a handrail 16 below, and the two ends of the handrail 16 are connected with the portal frame 13; and the control box 15 is electrically connected with the variable frequency centrifugal fan 1.

[0033] Specifically, the working state of the variable frequency centrifugal fan 1 is controlled by the control box 15.

[0034] As a further illustration of the embodiment, the handrail 16 is convenient for the operator to push the device to move.

[0035] In the embodiment, the drive module 18 comprises a battery 1801 and an electric wheel 1802; the electric wheel 1802 is symmetrically arranged in two, and the two electric wheels 1802 are respectively installed at the two ends of the battery 1801, and the two electric wheels 1802 are electrically connected with the battery 1801.

[0036] Specifically, the battery 1801 can continuously provide power to the electric wheel 1802 in the state of being separated from the external power supply.

[0037] As a further illustration of the embodiment, the electric wheel 1802 keeps in contact with the ground at the same time as the roller 17, and the rotation of the electric wheel 1802 can provide power assistance when the device moves.

[0038] The working principle of the utility model is: in use, first, the internal power supply is connected, the drive module 18 is started, the battery 1801 continuously provides power to the electric wheel 1802, the rotation of the electric wheel 1802 provides power assistance when the device moves, then the operator pushes the device through the handrail 16 to move to the designated place in cooperation with the roller 17, and the drive module 18 is turned off.

[0039] Subsequently, the fire damper 8 to be tested is installed between the adapter air pipe 7 and the terminal air pipe 9, and a soft pad needs to be added at the connection between the fire damper 8 and the adapter air pipe 7 and the terminal air pipe 9, and an aluminum foil tape is used outside the connection to increase the air tightness;

[0040] Connect the external power supply, start the variable frequency centrifugal fan 1 and the anemometer 10, observe the pressure data in the static pressure tank 4 through the micro pressure gauge 5, adjust the pressure data in the static pressure tank 4 by operating the adjusting air inlet valve 2 in cooperation with the variable frequency centrifugal fan 1, until the pressure is within the working pressure range of the fire damper 8 to be tested, finally observe the wind speed data at the DN40 flow hole 11 displayed by the anemometer 10, and then cooperate with the formula: air leakage = measured (DN40 flow hole) wind speed * DN40 flow hole cross-sectional area, so that the air leakage of the fire damper to be tested can be quickly obtained.

[0041] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0042] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A fire damper air leakage rate detection device, characterized by: The invention comprises a variable frequency centrifugal fan (1), wherein the variable frequency centrifugal fan (1) is installed at one end of the top of a base frame (12), and an adjustable air inlet valve (2) is installed at the air inlet end of the variable frequency centrifugal fan (1), and a door frame (13) is installed at the top of the base frame (12); a connecting air duct (3) is installed at the top of the variable frequency centrifugal fan (1), and the top of the connecting air duct (3) is connected to the bottom of a static pressure box (4), and the static pressure box (4) is arranged above the base frame (12); a micromanometer (5) is installed on the static pressure box (4); The air outlet end of the static pressure box (4) is equipped with a connecting hose (6), and the end of the connecting hose (6) is connected to the transfer air duct (7), and the air outlet end of the transfer air duct (7) is equipped with a fire damper (8); the air outlet end of the fire damper (8) is equipped with a terminal air duct (9), and a DN40 flow hole (11) is provided on the terminal air duct (9); an anemometer (10) is installed on the terminal air duct (9), and the anemometer (10) is connected to the DN40 flow hole (11); the transfer air duct (7) is mounted on one end of the top of the door frame (13).

2. The fire damper air leakage rate detection device according to claim 1, characterized in that: The bottom of the base frame (12) is symmetrically provided with two groups of rollers (17), and each group of rollers (17) is symmetrically provided with two rollers. A transmission shaft (19) is installed between the two rollers (17) near one end of the variable frequency centrifugal fan (1).

3. The fire damper air leakage rate detection device according to claim 1, characterized in that: A drive module (18) is installed at one end of the bottom of the base frame (12) close to the variable frequency centrifugal fan (1), and the drive module (18) is electrically connected to the control box (15).

4. The fire damper air leakage rate detection device according to claim 1, characterized in that: A baffle (14) is installed on the upper part of the door frame (13) close to the variable frequency centrifugal fan (1), and a control box (15) is installed on the baffle (14); a handrail (16) is provided below the baffle (14), and both ends of the handrail (16) are connected to the door frame (13); the control box (15) is electrically connected to the variable frequency centrifugal fan (1).

5. The fire damper air leakage rate detection device according to claim 3, characterized in that: The driving module (18) includes a battery (1801) and an electric wheel (1802); two electric wheels (1802) are symmetrically distributed, and the two electric wheels (1802) are respectively installed at the two ends of the battery (1801), and the two electric wheels (1802) are electrically connected to the battery (1801).

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