Mobile fire source weight measuring device for tunnel fire experiment

Abstract

The utility model discloses a mobile fire source weight measuring device for tunnel fire experiments, which can measure the weight of fuel in real time and control the moving speed of a trolley. Comprising a tunnel body and a movable weight measuring trolley, a track is arranged in the tunnel body, the movable weight measuring trolley is matched with the track, the movable weight measuring trolley comprises a weight measuring bottom plate, the upper end of the weight measuring bottom plate supports a fuel car hopper through a weight measuring system, and the lower end of the weight measuring bottom plate is provided with a driving system and four rubber rolling wheels distributed at the four corners. The driving system is used for driving the rubber rollers to rotate, and the rubber rollers are used for driving the movable weight measuring trolley to move along a track in the tunnel body; the driving system comprises a driving motor and an electronic speed regulator, the driving motor is a positive and negative rotation motor and is in power connection with the rubber rollers, and the electronic speed regulator controls the rotating speed of the driving motor; a hydraulic telescopic supporting steel frame is arranged at the bottom of the tunnel body and used for changing the gradient of the tunnel body.

Description

Technical Field

[0001] The utility model relates to the technical field of fire experiments, in particular to a mobile fire source weight measuring device used for tunnel fire experiments. Background Art

[0002] Conducting research on tunnel fires is an important way to reduce the occurrence of tunnel fires and reduce the impact of fires. Tunnel fire research includes full-scale fire tests, reduced-scale fire tests, theoretical analysis, numerical simulation and other methods. Full-scale fire tests do have the advantages of high intuitiveness and authenticity in tunnel structure research, but the application of this method is greatly limited due to the irreparable damage it may cause to the tunnel structure and the insufficient number of abandoned tunnels in reality. Therefore, establishing a reduced-scale tunnel fire test platform has become a more common and practical choice. The reduced-scale tunnel fire test platform simulates the situation of a tunnel fire by reducing the actual tunnel size. It has the advantages of low cost, easy operation, repeatable operation, and easy change of parameters and working conditions.

[0003] In response to tunnel fires, domestic and foreign studies have established tunnel fire simulation experiments with different tunnel geometries, blocking rates, single and double lanes, fuel areas, etc. However, the existing tunnel fire experimental platform mainly measures the weight of the fire source fuel before and after the experiment, and the impact of fuel changes on the heat release rate is mainly calculated through the average value. In actual situations, at different locations in the tunnel, due to differences in ventilation, oxygen content, humidity, etc., there are differences in combustion rates and fuel weights, which ultimately lead to differences in heat release rates at different times and locations. Therefore, real-time measurement of the fuel weight of the mobile trolley in the fire experiment is an important step in conducting tunnel fire research, and it is particularly important to develop a mobile fire source weight measurement device for tunnel fire tests.

[0004] The existing technology mainly uses a cable driven by a traction motor to pull a trolley for moving fire sources, which cannot achieve speed control, two-way movement, emergency braking and speed measurement of the trolley, so further improvement is needed. At the same time, the existing technology cannot perform real-time weight measurement of moving fire sources in tunnels, which needs to be solved urgently. Summary of the invention

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a mobile fire source weight measuring device for tunnel fire experiments, which can measure the fuel weight in real time and control the moving speed of the trolley.

[0006] The purpose of the utility model is achieved in this way:

[0007] A mobile fire source weighing device for tunnel fire experiments, comprising a tunnel body and a mobile weighing trolley, wherein a track is arranged in the tunnel body, and the mobile weighing trolley cooperates with the track in the tunnel body, and is characterized in that: the mobile weighing trolley comprises a rectangular weighing bottom plate, a power source is arranged on the weighing bottom plate, the upper end of the weighing bottom plate supports a fuel bucket through a weighing system, the lower end of the weighing bottom plate is provided with a driving system and four rubber rollers distributed at four corners, the weighing system and the driving system are electrically connected to the power source through a wire, the driving system is used to drive the four rubber rollers to rotate, and the four rubber rollers are used to drive the mobile weighing trolley to move along the track in the tunnel body;

[0008] The driving system includes a driving motor and an electronic speed regulator. The driving motor is a forward and reverse motor. The driving motor is connected to the rubber roller by power. The electronic speed regulator controls the speed of the driving motor through a frequency converter.

[0009] A hydraulic telescopic support steel frame is provided at the bottom of the tunnel body. The hydraulic telescopic support steel frame has a plurality of hydraulic telescopic support legs. The hydraulic telescopic support steel frame is used to change the slope of the tunnel body.

[0010] Preferably, the drive system further comprises a radiator, and the radiator is used to dissipate heat from the drive motor.

[0011] Preferably, the driving system further comprises a braking system, and the braking system is used to brake the driving motor.

[0012] Preferably, the drive system further comprises a rotary encoder; the rotary encoder is used to monitor the rotation speed of the drive motor.

[0013] Preferably, the weight measuring system includes a pressure sensor, a timing recording system and a microprocessor, the pressure sensor is used to measure the weight of the fuel bucket, the microprocessor is used to calculate the weight of the fuel in the fuel bucket, and the timing recording system is used to regularly record the weight of the fuel in the fuel bucket.

[0014] Preferably, a wireless system is provided on the weighing base plate, the wireless system is electrically connected to a power source via a wire, and the wireless system is connected to a computer via Bluetooth.

[0015] Preferably, a support shaft is provided at the lower end of the weighing base plate, and the lower end of the support shaft is connected to a fixed bayonet, which is an installation space for the rubber roller and the driving motor.

[0016] Preferably, a fireproof spacer is provided between the weighing system and the fuel bucket.

[0017] Preferably, the track in the tunnel body is a groove on the bottom surface of the tunnel, and the two sides of the mobile weighing trolley cooperate with the two side groove walls of the groove on the bottom surface of the tunnel to limit the position.

[0018] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0019] The weight measuring system can be used to measure the fuel weight of the mobile trolley in real time. The movement trajectory of the mobile fire source can be flexibly controlled by changing the tunnel slope and track route. The weight measuring system, drive system and wireless system are powered by a power supply. The wireless system is directly connected to the computer to record and control the fuel weight and speed of the trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a mobile weighing trolley;

[0022] Figure 3 It is a side view schematic diagram of the mobile weighing trolley;

[0023] Figure 4 This is a schematic diagram of a mobile weighing trolley viewed from above;

[0024] Figure 5 for Figure 2 A magnified schematic diagram of center A.

[0025] Attached photos

[0026] In the attached drawings, 1. hydraulic telescopic support steel frame; 2. tunnel body; 3. mobile weighing trolley; 2-1. groove on the bottom surface of the tunnel; 3-1. weighing bottom plate; 3-2. fireproof pad; 3-3. fuel truck bed; 3-4. rubber roller; 3-5. wireless system; 3-6. power supply; 3-7. drive system; 3-8. weighing system; 3-9 support shaft; 3-10. fixed bayonet; 3-11. drive motor. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] A mobile fire source weighing device for tunnel fire experiment, comprising a tunnel body 2, a mobile weighing trolley 3, a track is arranged in the tunnel body 2, the mobile weighing trolley 3 cooperates with the track in the tunnel body 2, the mobile weighing trolley 3 comprises a rectangular weighing bottom plate 3-1, a power supply 3-6 is arranged on the weighing bottom plate 3-1, the upper end of the weighing bottom plate 3-1 supports a fuel bucket 3-3 through a weighing system 3-8, the lower end of the weighing bottom plate 3-1 is provided with a driving system 3-7 and four rubber rollers 3-4 distributed at four corners, the weighing system 3-8 and the driving system 3-7 are electrically connected to the power supply 3-6 through wires, and the driving system 3-7 is electrically connected to the power supply 3-6 through wires. The driving system 3-7 is used to drive the four rubber rollers 3-4 to rotate, and the four rubber rollers 3-4 are used to drive the mobile weighing trolley 3 to move along the track in the tunnel body 2; the driving system 3-7 includes a driving motor 3-11 and an electronic speed regulator. The driving motor 3-11 is a forward and reverse motor. The driving motor 3-11 is power-connected to the rubber rollers 3-4, and the electronic speed regulator controls the speed of the driving motor 3-11 through a frequency converter; a hydraulic telescopic support steel frame 1 is provided at the bottom of the tunnel body 2. The hydraulic telescopic support steel frame 1 has a plurality of hydraulic telescopic support legs. The hydraulic telescopic support steel frame 1 is used to change the slope of the tunnel body 2.

[0029] Specifically:

[0030] like Figure 1 As shown, a mobile fire source weighing device for tunnel fire experiment includes a hydraulic telescopic support steel frame 1, a tunnel body 2, and a mobile weighing trolley 3 carrying a fire source. The tunnel body 2 has a track. In this embodiment, the track adopts a groove 2-1 on the bottom surface of the tunnel. The hydraulic telescopic support steel frame 1 can change the slope of the tunnel body 2; the groove 2-1 on the bottom surface of the tunnel can control the driving route of the trolley. Of course, the track can adopt various other common structural forms, such as an I-shaped track.

[0031] See also Figures 2 to 4 , 4 rubber rollers 3-4 are arranged under the mobile weighing trolley 3 carrying the fire source, and the rubber rollers 3-4 match the grooves 2-1 on the bottom surface of the tunnel, and the groove spacing includes the spacing of the rubber rollers of the trolley. The two sides of the trolley can also be guided by separately setting guide wheels to cooperate with the track to reduce friction.

[0032] The mobile weighing trolley 3 is provided with a weighing system 3-8, which is connected to the power supply 3-6 through a wire, so that the power supply 3-6 can supply power to the weighing system 3-8; the weighing system 3-8 includes a pressure sensor, a timing recording system and a microprocessor, the pressure sensor senses the weight of the fuel and converts it into an electrical signal, the microprocessor processes the electrical signal, measures the weight of the fuel bucket 3-3 through the pressure sensor, and accurately calculates the weight through the microprocessor to finally obtain the absolute weight value; the timing recording system can adjust the weight recording frequency of the weighing system according to the experimental requirements, and regularly records the weight burned in the fuel bucket 3-3. That is, the utility model can realize real-time monitoring of the weight of the trolley fuel.

[0033] The mobile weighing trolley 3 is provided with a driving system 3-7, which is connected to the power supply 3-6 through a wire, so that the power supply 3-6 can supply power to the driving system 3-7; the driving system includes a driving motor, an electronic speed regulator, a brake system, a radiator and a rotary encoder; the driving motor is a forward and reverse motor, which can drive the mobile weighing trolley 3 forward and backward; the electronic speed regulator controls the rotation speed of the driving motor by using a frequency converter to control the speed of the trolley; the brake system slows down and stops the trolley by controlling the motor to stop rotating or reverse rotation; the radiator can effectively dissipate the heat of the motor to ensure the safe operation of the motor; the rotary encoder converts the mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion, determines the rotation speed of the motor, and further determines the running speed of the trolley. That is, the utility model can realize the forward motion, reverse motion, speed control and monitoring of the trolley. Of course, the brake system can also use various common mechanical brake structures for braking.

[0034] The mobile weighing trolley 3 is provided with a wireless system 3-5, which is connected to the power supply 3-6 through a wire, so that the power supply 3-6 can supply power to the wireless system 3-5; the wireless system 3-5 includes a wireless receiving and sending module, and the wireless system 3-5 is connected to the computer via Bluetooth. The wireless receiving and sending module converts electrical signals and electromagnetic waves to each other, so as to realize real-time monitoring of the fuel weight and speed of the trolley 3.

[0035] See also Figure 5 , is a tunnel mobile fire source weight measuring device according to the embodiment of the utility model Figure 2 In the enlarged view of point A, a support shaft is provided at the lower end of the weighing base plate, and the lower end of the support shaft is connected to a fixed bayonet, which is the installation space for the rubber roller and the drive motor. The rubber roller is installed in the fixed bayonet 3-10 through a bearing, and the corresponding drive motor of the rubber roller to be driven is fixed in the fixed bayonet, and the shaft of the drive motor is connected to the rubber roller. The connection between the rubber roller and the main body of the trolley is realized.

[0036] The tunnel mobile fire source weighing device for tunnel fire experiments provided by the embodiment of the utility model can flexibly control the movement trajectory of the mobile fire source by changing the slope of the tunnel body and the groove path on the bottom surface of the tunnel; the trolley's own power supply system can be used to charge the trolley's weighing system, driving system and wireless system; the trolley's weighing system can realize real-time measurement and monitoring of the fuel weight; the rotary encoder can realize real-time monitoring of the trolley's speed; and the built-in braking system in the trolley's power system can realize timely braking.

[0037] On the basis of the above embodiment, a fireproof spacer 3-2 is arranged above the weighing system 3-8 to further prevent damage to the weighing system 3-8 caused by high temperature of the wall surface;

[0038] On the basis of the above embodiments, the drive system 3-7 also includes a heat dissipation system for the motor, which can achieve effective heat dissipation of the drive motor and prevent damage to the motor caused by excessive heat.

[0039] The mobile fire source weighing device for tunnel fire testing provided by the embodiment of the utility model further prevents damage to the equipment due to high temperature and overheating.

[0040] On the basis of the above embodiment, the tunnel body 2 can change the tunnel slope by means of the hydraulic telescopic support steel frame 1. The slope is changed according to the experimental requirements. The hydraulic telescopic support steel frame 1 has a plurality of hydraulic telescopic support legs, which can be extended and retracted individually.

[0041] The mobile fire source weighing device for tunnel fire test provided by the embodiment of the utility model further realizes flexible control of the movement trajectory of the mobile fire source.

[0042] The utility model measures the weight of the fire source fuel in real time to clarify the relationship between the reduction of the fuel and the heat release rate during the experiment; controls and monitors the moving speed of the trolley inside the tunnel body through the trolley power system and the rotary encoder; and monitors and records the fuel weight and speed of the trolley in the tunnel in real time through the wireless system.

[0043] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A mobile fire source weighing device for tunnel fire experiments, comprising a tunnel body and a mobile weighing trolley, wherein a track is arranged in the tunnel body, and the mobile weighing trolley is matched with the track in the tunnel body, and characterized in that: The mobile weighing trolley includes a rectangular weighing bottom plate, a power source is arranged on the weighing bottom plate, the upper end of the weighing bottom plate supports the fuel bucket through a weighing system, the lower end of the weighing bottom plate is provided with a driving system and four rubber rollers distributed at four corners, the weighing system and the driving system are electrically connected to the power source through wires, the driving system is used to drive the four rubber rollers to rotate, and the four rubber rollers are used to drive the mobile weighing trolley to move along the track in the tunnel body; The driving system includes a driving motor and an electronic speed regulator. The driving motor is a forward and reverse motor. The driving motor is connected to the rubber roller by power. The electronic speed regulator controls the speed of the driving motor through a frequency converter. A hydraulic telescopic support steel frame is provided at the bottom of the tunnel body. The hydraulic telescopic support steel frame has a plurality of hydraulic telescopic support legs. The hydraulic telescopic support steel frame is used to change the slope of the tunnel body.

2. A mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: The driving system further comprises a radiator, which is used for dissipating heat from the driving motor.

3. A mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: The driving system also includes a brake system, and the brake system is used to brake the driving motor.

4. A mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: The driving system further comprises a rotary encoder; the rotary encoder is used to monitor the rotation speed of the driving motor.

5. The mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: The weight measuring system comprises a pressure sensor, a timing recording system and a microprocessor. The pressure sensor is used to measure the weight of the fuel bucket. The microprocessor is used to calculate the weight of the fuel in the fuel bucket. The timing recording system is used to regularly record the weight of the fuel in the fuel bucket.

6. The mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: The weighing bottom plate is provided with a wireless system, the wireless system is electrically connected to a power source via a wire, and the wireless system is connected to a computer via Bluetooth.

7. The mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: A support shaft is arranged at the lower end of the weighing bottom plate, and the lower end of the support shaft is connected to a fixed bayonet, which is an installation space for a rubber roller and a driving motor.

8. The mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: A fireproof partition is installed between the weighing system and the fuel truck bed.

9. The mobile fire source weighing device for tunnel fire experiment according to claim 1, characterized in that: The track in the tunnel body is a groove on the bottom surface of the tunnel, and the two sides of the mobile weighing trolley are limited by the groove walls on both sides of the groove on the bottom surface of the tunnel.

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