Cloud chamber pyrolysis particle fogging control device

Abstract

The invention relates to a cloud chamber pyrolysis particle fogging control device applied to the technical field of fire detection, and the cloud chamber pyrolysis particle fogging control device comprises a cloud chamber, an air inlet, an air outlet, an air inlet valve, an air outlet valve, an air plug module, a sealing plug piece, a buffer spring, an air inlet partition door, an air outlet partition door, a fog blocking piece and a connecting cable. When sampling gas is discharged and cloud is formed, the sampling gas can be discharged through the gas inlet and the gas outlet at the same time, the cloud formed in the middle of the cloud chamber is subjected to equal reverse thrust on the two sides, turbulent flow is effectively prevented, and when pressurized gas is discharged at the gas inlet and the gas outlet at the same time, after the gas pressure in the cloud chamber is recovered, the state of the sealing piece is restored. And the mist blocking sheet separates the mist formed in the middle of the mist chamber, so that the loss reduction and anti-interference capabilities of the mist are further effectively improved, and the concentration detection precision of the mist is effectively improved.

Description

Technical Field

[0001] A fog formation control device involved in the present invention, particularly a cloud chamber pyrolysis particle fog formation control device applied to the field of fire detection technology. Background Art

[0002] A pyrolysis particle detector is a device used for fire detection. It identifies fires by detecting pyrolysis particles generated by fires. The working principle of the pyrolysis particle detector is to utilize laser scattering technology. When a laser irradiates pyrolysis particles in the air, a scattering phenomenon will occur. The detector can judge the concentration of pyrolysis particles in the air by detecting the intensity and distribution of the scattered light. When the concentration of pyrolysis particles exceeds the set threshold, the detector will issue an alarm to indicate that a fire may occur.

[0003] The working mode of the existing pyrolysis particle fog formation control device is to continuously send sampling gas into the cloud chamber by using an air pump to form high-pressure sampling gas in the cloud chamber. Subsequently, the high-pressure gas inside the cloud chamber is quickly discharged, the air pressure drops rapidly, and at the same time the gas temperature drops rapidly. Water vapor forms clouds with pyrolysis particles as condensation nuclei.

[0004] The specification of Chinese Patent CN202111227866.2 discloses "An Early Fire Identification Method and System", which provides an early fire identification method and system for ultra-early fire identification based on the integration of cloud chamber pre-detection technology and optical scattering chamber secondary detection technology. By performing a mixed numerical mathematical algorithm on the microparticle data detected by the cloud chamber and the large particle data detected by the scattering chamber, accurate on-site early fire risk data can be obtained; and targeted analysis is carried out on the ultra-early fire detection data in this environment to formulate an ultra-early fire monitoring and warning mechanism that conforms to the on-site characteristics, so as to achieve efficient and accurate perception of the on-site ultra-early fire risk.

[0005] The air inlet and outlet of the existing cloud chamber can only perform unidirectional air intake and exhaust operations. When the outlet is opened alone to discharge the high-pressure gas inside the cloud chamber, the clouds generated inside the cloud chamber will have turbulence due to the flow of gas towards the outlet direction. Therefore, it is necessary to perform numerical detections multiple times in the above-mentioned patent to improve the detection accuracy. However, the clouds used for detection in the middle of the cloud chamber are not stable enough, the concentration of the clouds is easy to drop rapidly, and the clouds are uneven in thickness due to the movement of the turbulence, directly greatly affecting the observation data and ultimately bringing deviations in the observation results. Summary of the Invention

[0006] Aiming at the above-mentioned existing technologies, the technical problem to be solved by the present invention is that the clouds used for detection in the middle of the cloud chamber are not stable enough, the concentration of the clouds is easy to drop rapidly, and the clouds are uneven in thickness due to the movement of the turbulence, directly greatly affecting the observation data and ultimately bringing deviations in the observation results.

[0007] To solve the above problems, the present invention provides a cloud chamber pyrolysis particle atomization control device, which includes a cloud chamber. At both ends of the bottom of the cloud chamber, an air inlet and an air outlet are respectively and fixedly opened. The outer ports of the air inlet and the air outlet are fixedly connected with an intake pipe and an outlet pipe. An intake valve and an outlet valve are respectively and fixedly connected in series in the middle of the intake pipe and the outlet pipe.

[0008] Both the intake valve and the outlet valve are arranged as two-position three-way valves. The intake valve has three ports A1, A2, and A3. The A1 port communicates with the air inlet, and the A2 port is fixedly connected with an air pump. The outlet valve has three ports B1, B2, and B3. The B1 port communicates with the air outlet, the B2 port communicates with the outlet end of the outlet pipe, and the B3 port is set in a blocked state.

[0009] In the middle of the inner ports of the air inlet and the air outlet, a gas plug module is respectively and fixedly inserted. A sealing piece is movably connected in the middle of the gas plug module. Buffer springs are respectively and fixedly connected between the upper surface and the lower surface of the sealing piece and the top end and the bottom end of the gas plug module. At both ends of the inside of the cloud chamber, an intake partition door and an outlet partition door are respectively and fixedly connected corresponding to the air inlet and the air outlet. At both ends of the inside of the intake partition door and the outlet partition door, fog-blocking sheets are respectively and fixedly connected. A connecting cable is fixedly connected between the middle of the fog-blocking sheet and the upper surface of the sealing piece.

[0010] In the above cloud chamber pyrolysis particle atomization control device, by arranging the intake valve and the outlet valve as two-position three-way valves, when sampling gas is discharged and fog is formed, it can be discharged simultaneously through the air inlet and the air outlet. The fog formed in the middle of the cloud chamber receives equal reaction forces from both sides, effectively preventing the generation of turbulence and minimizing the loss and interference of the fog.

[0011] As a further improvement of the present application, the intake valve and the outlet valve also include being arranged as three-position four-way valves and three-position five-way valves, so as to realize that while exhausting air at the air inlet, the high pressure stored in the air pump is not affected, which is convenient for the air pump to transport sampling gas to the cloud chamber again.

[0012] As a further improvement of the present application, at the edges of the opposite ends of the two fog-blocking sheets, support ribs are respectively and fixedly inlaid. The middle of the support ribs is fixedly connected with the connecting cable. The support ribs are made of stainless steel material, and the fog-blocking sheets are made of elastic rubber material. The support ribs are used to effectively improve the extension effect of the fog-blocking sheets and facilitate the bending change of the fog-blocking sheets made of elastic rubber material, thereby effectively improving the blocking effect of the fog-blocking sheets on rain and fog.

[0013] As a further improvement of the present application, at one end of the middle of the intake partition door facing the air inlet and at one end of the middle of the outlet partition door facing the air outlet, spool holders are respectively and fixedly connected. The connecting cable bypasses the spool holders. By the connecting cable bypassing the spool holders, the middle of the fog-blocking sheet can be directly pulled by the connecting cable, thereby effectively improving the bending and opening effect of the fog-blocking sheet.

[0014] As another improvement of the present application, air holes are fixedly provided at the joint of the intake partition door and the cloud chamber. The air holes are parallel to the inner wall of the cloud chamber. When gas enters the cloud chamber, the gas passes through the air holes at the edge of the intake partition door, causing the air flow to blow the inner wall of the cloud chamber and quickly eliminating the condensed water mist on the inner wall of the cloud chamber, thereby avoiding the influence of the residual moisture in the cloud chamber on the detection effect of pyrolysis particles.

[0015] As a supplement to another improvement of the present application, a valve flap is covered at one end of the air hole facing the middle of the cloud chamber. The end of the valve flap away from the inner wall of the cloud chamber is fixedly connected to the surface of the intake partition door, and the valve flap is made of elastic rubber material. By covering and closing the air hole with the valve flap, when the cloud chamber deflates, the released gas is prevented from flowing through the air hole to the air inlet, thereby avoiding that when the cloud chamber performs the deflation operation, the amount of gas flowing to the air inlet is greater than the amount of gas flowing to the air outlet, and thus avoiding affecting the balance of the cloud state in the middle of the cloud chamber.

[0016] As a supplement to another improvement of the present application, guide sheets arranged in parallel are fixedly connected to one end of the inner wall of the cloud chamber close to the intake partition door. The guide sheets are parallel to the air holes. The air flow passing through the air holes passes through the parallel arranged guide sheets, realizing the dispersion of the air flow, and thus realizing the dehumidification effect on the inner wall of the cloud chamber.

[0017] In summary, in the present invention, by setting the intake valve and the exhaust valve as two-position three-way valves, when sampling gas is released to form clouds, it can be released simultaneously through the air inlet and the air outlet. The clouds formed in the middle of the cloud chamber are subjected to equal counter-thrusts on both sides, effectively preventing the generation of turbulence. When pressurized gas is released simultaneously at the air inlet and the air outlet, the pressurized gas pushes the sealing sheet in the middle of the air plug module, pushing the sealing sheet down to realize the release and flow of the gas. During the process of the sealing sheet descending, the fog blocking sheet is pulled by the connecting cable to bend and open, facilitating the flow of the pressurized gas in the middle of the cloud chamber to both ends. After the internal pressure of the cloud chamber is restored, the state of the sealing sheet is restored, and the fog blocking sheet divides the clouds formed in the middle of the cloud chamber, further effectively improving the loss reduction and anti-interference capabilities of the clouds, and thus effectively improving the concentration detection accuracy of the clouds. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional sectional view structure diagram of the first embodiment of the present application;

[0019] Figure 2 It is a three-dimensional structure diagram of the first embodiment of the present application;

[0020] Figure 3 It is a plan view of the first embodiment of the present application;

[0021] Figure 4It is an enlarged view of the air plug module in the second embodiment of this application;

[0022] Figure 5 It is a three-dimensional structure diagram of the air plug module in the second embodiment of this application;

[0023] Figure 6 It is a demonstration diagram of the state where the sealing piece is lifted in the second embodiment of this application;

[0024] Figure 7 It is a demonstration diagram of the state where the sealing piece is pressed down in the second embodiment of this application;

[0025] Figure 8 It is a demonstration diagram of the bending change of the fog barrier sheet in the second embodiment of this application;

[0026] Figure 9 It is a three-dimensional structure diagram of the intake partition door in the second embodiment of this application;

[0027] Figure 10 It is a top-down sectional three-dimensional structure diagram of the cloud chamber in the third embodiment of this application;

[0028] Figure 11 It is an enlarged view of the air hole in the third embodiment of this application;

[0029] Figure 12 It is a demonstration diagram of the bending change of the valve sheet in the third embodiment of this application.

[0030] Explanation of the reference numerals in the figure:

[0031] 1. Cloud chamber; 101. Intake port; 102. Exhaust port; 103. Intake pipe; 104. Exhaust pipe; 105. Intake valve; 106. Exhaust valve; 107. Air pump; 2. Air plug module; 201. Sealing piece; 202. Buffer spring; 3. Intake partition door; 301. Exhaust partition door; 302. Fog barrier sheet; 303. Connecting cable; 304. Spool holder; 305. Support rib; 4. Air hole; 401. Valve sheet; 402. Guide sheet. Specific embodiments

[0032] The following will make a detailed description of the three embodiments of this application with reference to the accompanying drawings.

[0033] The first embodiment:

[0034] Figures 1 to 3Shown is a cloud chamber pyrolysis particle atomization control device, including a cloud chamber 1. At both ends of the bottom of the cloud chamber 1, an air inlet 101 and an air outlet 102 are fixedly provided respectively. The outer ports of the air inlet 101 and the air outlet 102 are fixedly connected with an air inlet pipe 103 and an air outlet pipe 104. An air inlet valve 105 and an air outlet valve 106 are fixedly connected in series in the middle of the air inlet pipe 103 and the air outlet pipe 104 respectively. And the input end of the air inlet pipe 103 is fixedly connected with an air pump 107. Both the air inlet valve 105 and the air outlet valve 106 are arranged as two-way three-way valves. The air inlet valve 105 has three ports A1, A2 and A3. The A1 port communicates with the air inlet 101, the A2 port communicates with the air pump 107. The air outlet valve 106 has three ports B1, B2 and B3. The B1 port communicates with the air outlet 102, the B2 port communicates with the outlet end of the air outlet pipe 104, and the B3 port is set in a blocked state. The air inlet valve 105 and the air outlet valve 106 also include being arranged as three-way four-way valves and three-way five-way valves, realizing that while exhausting at the air inlet 101, the high pressure stored in the air pump 107 is not affected, facilitating the air pump 107 to transport sampling gas to the cloud chamber 1 again. At the same time, the newly added ports can also mix a certain amount of water vapor into the sampling gas. Usually, due to the objective existence of air humidity, the sampling gas generally already contains an indefinite amount of mixed water vapor. Therefore, additional water vapor does not need to be mixed separately;

[0035] The working process of the cloud chamber atomization control device of the present invention is divided into three states:

[0036] State 1: The air inlet valve 105 is in a state where the A1 port is connected to the A2 port, the air outlet valve 106 is in a state where the B1 port is connected to the B2 port, the air pump 107 is in a gas delivery state, the sampling gas enters the cloud chamber 1 through the air inlet 101 and then is discharged from the air outlet 102. The air pump 107 keeps working until all the original air in the cloud chamber 1 is replaced by the sampling gas.

[0037] State 2: The air outlet valve 106 is switched to a state where the B1 port is connected to the B3 port, that is, the air outlet pipe 104 is blocked. The air pump 107 continuously inputs the sampling gas into the cloud chamber 1. Since the sampling gas cannot be discharged through the air outlet 102 at this time, the gas in the cloud chamber 1 will be continuously compressed and the air pressure will increase until the internal air pressure of the cloud chamber 1 reaches the preset value, and then the air pump 107 stops working.

[0038] State 3: The internal air pressure of the cloud chamber 1 has reached the preset value. At this time, the air inlet valve 105 is switched to a state where the A1 port is connected to the A3 port, and the air outlet valve 106 resumes the state where the B1 port is connected to the B2 port, forming two discharge paths for the compressed gas in the cloud chamber 1, that is, the air inlet 101 and the air outlet 102 discharge simultaneously. The pressure of the compressed sampling gas drops suddenly, and the gas does external work equivalent to it, and the internal temperature drops rapidly, forming clouds.

[0039] At both ends of the cloud chamber 1, the high-pressure sampling gas is discharged simultaneously. The cloud formed in the middle of the cloud chamber 1 is subjected to equal counter-thrust forces on both sides, thereby effectively reducing the movement of the cloud and effectively preventing the generation of turbulence. A large amount of cloud generated in the middle of the cloud chamber 1 is in a stable state, effectively improving the detection accuracy of the cloud concentration.

[0040] The second implementation method:

[0041] Compared with the first implementation method, an air plug module 2 and a fog barrier 302 are mainly added. The specific added structure is as follows, and the rest of the structure is the same as that of the first implementation method.

[0042] Figures 4 to 9 As shown, air plug modules 2 are fixedly inserted in the middle of the inner ports of the air inlet 101 and the air outlet 102. A sealing piece 201 is movably connected to the middle of the air plug module 2. Buffer springs 202 are fixedly connected between the upper and lower surfaces of the sealing piece 201 and the top and bottom of the air plug module 2. At both ends of the inside of the cloud chamber 1 corresponding to the air inlet 101 and the air outlet 102, an air inlet partition door 3 and an air outlet partition door 301 are fixedly connected respectively. Fog barriers 302 are fixedly connected to both ends of the inside of the air inlet partition door 3 and the air outlet partition door 301. A connecting cable 303 is fixedly connected between the middle of the fog barrier 302 and the upper surface of the sealing piece 201. At the edges of the opposite ends of the two fog barriers 302, support ribs 305 are fixedly inlaid. The middle of the support ribs 305 is fixedly connected to the connecting cable 303. The support ribs 305 are made of stainless steel material, and the fog barriers 302 are made of elastic rubber material. The use of the support ribs 305 effectively improves the extension effect of the fog barriers 302 and facilitates the bending change of the fog barriers 302 made of elastic rubber material, thereby effectively improving the blocking effect of the fog barriers 302 on rain and fog. At one end of the middle of the air inlet partition door 3 facing the air inlet 101 and at one end of the middle of the air outlet partition door 301 facing the air outlet 102, spool holders 304 are fixedly connected respectively. The connecting cable 303 bypasses the spool holders 304. By the connecting cable 303 bypassing the spool holders 304, the middle of the fog barrier 302 is directly pulled by the connecting cable 303, thereby effectively improving the bending opening effect of the fog barrier 302;

[0043] When the intake port 101 and the outlet port 102 of the cloud chamber 1 are simultaneously vented, the high-pressure sampling gas presses down the sealing piece 201 in the middle of the air plug module 2, and uses the connecting cable 303 to pull the fog barrier piece 302 to bend and deform. The gas pressure at the positions of the intake port 101 and the outlet port 102 is high, which facilitates the displacement of the sealing piece 201 affected by the wind force, and facilitates the pressure relief of the sampling gas in the middle of the cloud chamber 1. After the internal air pressure environment of the cloud chamber 1 is restored, the position of the sealing piece 201 is restored, and the fog barrier piece 302 is driven to resume blocking the middle of the cloud chamber 1, providing a relatively stable environment for the cloud in the middle of the cloud chamber 1. The reason is that the clouds generated at both ends of the cloud chamber 1 will follow the gas and be discharged from the intake port 101 and the outlet port, that is, the clouds at both ends of the cloud chamber 1 are thinner than the clouds in the middle, so as to effectively prevent the clouds in the middle of the cloud chamber 1 from filling the intake port 101 area and the outlet port 102 area, facilitating the maintenance of a large amount of clouds in the middle of the cloud chamber 1 and effectively improving the detection accuracy of the cloud concentration.

[0044] The third implementation mode:

[0045] Compared with the second implementation mode, a pore 4 is mainly newly added. The specific newly added structure is as follows, and the other structures are the same as those of the first implementation mode.

[0046] Figures 9 to 12 As shown, a pore 4 is fixedly opened at the joint of the intake partition door 3 and the cloud chamber 1. When the intake port 101 is in the intake state, at this time, the fog barrier piece 302 in the intake partition door 3 can only be blown open by the wind force. Therefore, through the opened pore 4, it is more convenient for the gas to enter the cloud chamber 1. The pore 4 is parallel to the inner wall of the cloud chamber 1. When the gas enters the cloud chamber 1, the gas passing through the pore 4 is closer to the inner wall of the cloud chamber 1, which is convenient for quickly eliminating the water droplets condensed on the inner wall of the cloud chamber 1, thereby avoiding the influence of the residual moisture in the cloud chamber 1 on the detection effect of the pyrolysis particles. One end of the pore 4 facing the middle of the cloud chamber 1 is covered with a valve piece 401. One end of the valve piece 401 away from the inner wall of the cloud chamber 1 is fixedly connected to the surface of the intake partition door 3, and the valve piece 401 is made of elastic rubber material. By covering the pore 4 with the valve piece 401, it is realized that when the cloud chamber 1 is vented, the vented gas is blocked by the valve piece 401 and cannot flow through the pore 4 to the intake port 101, thus avoiding affecting the balance of the cloud state in the middle of the cloud chamber 1. That is, when the cloud chamber 1 is vented, the vented gas is blocked by the valve piece 401 and cannot pass through the pore 4, effectively preventing more gas from passing through the intake partition door 3 and maintaining the relative balance of the gas discharged from the cloud chamber 1 to both ends. One end of the inner wall of the cloud chamber 1 close to the intake partition door 3 is fixedly connected with parallel guide pieces 402. The guide pieces 402 are parallel to the pore 4. The air flow passing through the pore 4 passes through the parallel guide pieces 402, realizing the dispersion of the air flow, and thus realizing the dehumidification effect on the inner wall of the cloud chamber 1;

[0047] When replacing the original air in the cloud chamber 1 with the sampling gas, the gas entering from the air inlet 101 needs to rely on its own wind force to blow open the fog barrier 302 in the middle of the air inlet partition door 3. Therefore, most of the gas is blocked by the air inlet partition door 3 and the fog barrier 302 at one end of the cloud chamber 1 close to the air inlet 101. At this time, the gas can more conveniently pass through the air inlet partition door 3 through the opening pores 4, so as to realize the entry of the sampling gas into the cloud chamber 1. The sampling gas passing through the pores 4 pushes open the valve flap 401, and the gas flows along the inclined valve flap 401, as Figure 12 shown. The sampling gas is further dispersed by the guide piece 402, blows on the inner wall of the cloud chamber 1, and dries the condensed water droplets on the inner wall of the cloud chamber 1, so as to realize the dehumidification effect on the inner wall of the cloud chamber 1.

[0048] Combined with the current actual needs, the above implementation manner adopted in this application, the protection scope is not limited thereto. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A cloud chamber pyrolysis particle mist control device, characterized in that: The invention comprises a mist chamber (1), wherein an air inlet (101) and an air outlet (102) are fixedly provided at both ends of the bottom of the mist chamber (1), an air inlet pipe (103) and an air outlet pipe (104) are fixedly connected to the outer ends of the air inlet (101) and the air outlet (102), and an air inlet valve (105) and an air outlet valve (106) are fixedly connected in series at the middle of the air inlet pipe (103) and the air outlet pipe (104); The air inlet valve (105) and the air outlet valve (106) are both arranged as two-position three-way valves. The air inlet valve (105) is provided with three ports, namely, A1, A2 and A3. The A1 port is connected to the air inlet (101), and the A2 port is fixedly connected to the air pump (107). The air outlet valve (106) is provided with three ports, namely, B1, B2 and B3. The B1 port is connected to the air outlet (102), and the B2 port is connected to the air outlet end of the air outlet pipe (104). The B3 port is arranged to be in a blocked state. The middle parts of the inner ports of the air inlet (101) and the air outlet (102) are fixedly plugged with an air plug module (2); the middle part of the air plug module (2) is movably connected with a sealing piece (201); a buffer spring (202) is fixedly connected between the upper surface and the lower surface of the sealing piece (201) and the top and the bottom of the air plug module (2); the inner ends of the cloud chamber (1) are respectively fixedly connected with an air inlet partition door (3) and an air outlet partition door (301) corresponding to the air inlet (101) and the air outlet (102); the inner ends of the air inlet partition door (3) and the air outlet partition door (301) are fixedly connected with a fog blocking piece (302); and a connecting rope (303) is fixedly connected between the middle part of the fog blocking piece (302) and the upper surface of the sealing piece (201).

2. A cloud chamber pyrolysis particle mist control device according to claim 1, characterized in that: The air inlet valve (105) and the air outlet valve (106) also include a three-position four-way valve and a three-position five-way valve.

3. The cloud chamber pyrolysis particle mist control device according to claim 1, characterized in that: The edges of the two fog blocking sheets (302) facing each other are fixedly inlaid with support ribs (305), the middle part of the support ribs (305) is fixedly connected to the connecting rope (303), the support ribs (305) are made of stainless steel material, and the fog blocking sheets (302) are made of elastic rubber material.

4. The cloud chamber pyrolysis particle mist control device according to claim 1, characterized in that: One end of the middle of the air inlet partition door (3) facing the air inlet (101) and one end of the middle of the air outlet partition door (301) facing the air outlet (102) are both fixedly connected to a bobbin frame (304), and the connecting rope (303) is passed around the bobbin frame (304).

5. The cloud chamber pyrolysis particle mist control device according to claim 1, characterized in that: An air hole (4) is fixedly provided at the joint between the air inlet partition door (3) and the mist chamber (1), and the air hole (4) corresponds to and is parallel to the inner wall of the mist chamber (1).

6. A cloud chamber pyrolysis particle mist control device according to claim 5, characterized in that: One end of the air hole (4) facing the middle of the mist chamber (1) is covered with a valve sheet (401), and one end of the valve sheet (401) away from the inner wall of the mist chamber (1) is fixedly connected to the surface of the air inlet partition door (3), and the valve sheet (401) is made of elastic rubber material.

7. The cloud chamber pyrolysis particle mist control device according to claim 5, characterized in that: One end of the inner wall of the cloud chamber (1) close to the air inlet partition door (3) is fixedly connected with a parallel-arranged guide piece (402), and the guide piece (402) corresponds to the air hole (4) in parallel.

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