An adjustable environmental test chamber for detecting harmful gas release

Abstract

The present invention discloses an adjustable environmental test chamber for detecting the amount of harmful gas released, which relates to the technical field of harmful gas detection, and includes a chamber, a placement component, a sealing component, a lifting component and a transmission component. A rectangular hole is provided on the outer wall of one side of the chamber, and the placement component and the rectangular hole are slidably connected. The placement component includes a rectangular seat slidably connected in the rectangular hole, and a connection hole is provided on one side of the top outer wall and the bottom outer wall of the rectangular seat. The same sliding seat is slidably connected in the two connecting holes, and a placement groove is provided on the top outer wall of the sliding seat, and a placement table is fixedly connected to the bottom inner wall of the placement groove. The present invention can draw the gas in the placement groove into the cavity through the air extraction hole, and then enter the circular groove through the cavity and the third one-way valve, so that only a very small part of the harmful gas in the placement groove enters the detection workshop, thereby ensuring the air quality of the detection workshop and protecting the health of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of harmful gas detection, and in particular to an adjustable environmental test chamber for detecting the release amount of harmful gases. Background Art

[0002] The raw materials of finished furniture are mostly artificial boards, which are the main source of indoor formaldehyde. Therefore, in order to ensure the health of users and comply with national standards, it is necessary to test the release of harmful gases (the main component is formaldehyde) before the artificial boards are put into use to determine whether the artificial boards meet the furniture manufacturing standards. Therefore, an adjustable environmental test chamber for detecting the release of harmful gases is needed.

[0003] A Chinese invention patent with publication number CN106093312B discloses an odor, VOC and floating harmful substance detection cabin with a light testing function, including a constant temperature and / or constant humidity cabin for providing a standard test environment, at least one odor sampling port is provided on the cabin, the cabin is connected to a gas compensation device for compensating the gas volume inside the cabin during the gas sampling process to prevent polluted gas outside the cabin from entering the cabin due to pressure difference, the gas compensation device is installed inside or outside the cabin, or the gas compensation device is opened and sealed and fixed on the wall of the cabin, at least one side of the cabin is a glass structure, and an infrared heating device or a sunlight lamp is provided on the outside of the glass structure.

[0004] This technical solution has the following deficiencies:

[0005] In this technical solution, when conducting specific detection of harmful gas content, it is necessary to extract the gas inside the cabin through the odor sampling port, and then use the detection device to detect the content of harmful gases such as formaldehyde in the sample gas. In order for the detection work to proceed normally, it is necessary to extract more gas in the cabin as a sample, which leads to a large deviation in the test result when the test is performed again after the temperature is changed. Summary of the invention

[0006] The purpose of the present invention is to provide an adjustable environmental test chamber for detecting the release of harmful gases, so as to solve the technical problem in the prior art that the sampling process causes a large reduction in the gas inside the chamber, thereby affecting the subsequent detection results.

[0007] The present invention provides an adjustable environmental test chamber for detecting the amount of harmful gas released, comprising a chamber body, a placement component, a sealing component, a lifting component and a transmission component.

[0008] A rectangular hole is provided on the outer wall of one side of the cabin body, and the placement component is slidably connected to the rectangular hole, the placement component includes a rectangular seat slidably connected in the rectangular hole, a connection hole is provided on one side of the top outer wall and the bottom outer wall of the rectangular seat, and the same sliding seat is slidably connected in the two connecting holes, a placement groove is provided on the top outer wall of the sliding seat, and a placement table is fixedly connected to the bottom inner wall of the placement groove, the placement table is used to place the detection reagent, and the sealing component is used to seal the placement groove;

[0009] A cavity is provided in the sliding seat below the placement groove, a plurality of equally spaced exhaust holes are provided on the inner wall at the bottom of the placement groove, and the exhaust holes are all connected to the cavity, and an exhaust component for extracting gas from the placement groove is provided on the inner wall at the bottom of the cavity;

[0010] The outer wall of the top of the sliding seat is provided with connecting grooves at both sides of the placement groove, and the sealing component is slidably connected to the two connecting grooves. A connecting hole is provided inside the sliding seat below the air extraction component, and the connecting hole is connected to the air extraction component and the two connecting grooves.

[0011] The lifting assembly is used to drive the sealing assembly to rise and fall, and the transmission assembly is used to drive the sliding seat to rise and fall.

[0012] Preferably, the vacuum assembly includes a circular groove formed on the inner wall of the bottom of the cavity, a third one-way valve is fixedly connected to the top of the inner wall of the circular groove, a first piston block is slidably connected to the inner wall of the circular groove below the third one-way valve, two fixed holes are formed on the outer wall of the top of the first piston block, the first one-way valve is fixedly connected in both of the fixed holes, a transmission rod is fixedly connected to the outer wall of the bottom end of the transmission rod, a second piston block is fixedly connected to the outer wall of the bottom end of the transmission rod, a second through hole connected to the connecting hole is formed on the outer wall of the bottom of the circular groove, and the second piston block is slidably connected in the second through hole.

[0013] Preferably, a first through hole communicating with the connecting hole is formed on the inner wall of the bottom of the circular groove, and a second one-way valve is fixedly connected in the first through hole.

[0014] Preferably, the sealing assembly includes a hollow tube slidably connected in two connecting grooves, the outer walls of the bottom ends of the two hollow tubes are fixedly connected with sealing rings, the arc-shaped outer walls of the two hollow tubes are fixedly connected with the same sealing block, the top outer wall of the sealing block is fixedly connected with a connecting plate, and the two hollow tubes pass through the top outer wall of the connecting plate, and the top outer wall of the connecting plate is fixedly connected with a pressure relief assembly connected to the two hollow tubes.

[0015] Preferably, the pressure relief assembly includes a connecting tube fixedly connected to the top outer wall of the connecting plate, and the connecting tube is connected to the two hollow tubes, an output tube is fixedly connected to the top of the arc-shaped outer wall of the connecting tube, a support block is fixedly connected to the top of the inner wall of the output tube, a spring is fixedly connected to the bottom outer wall of the support block, a third piston block is slidably connected to the inner wall of the output tube, and the third piston block and the spring are fixedly connected, a plurality of equidistantly distributed output holes are opened on the arc-shaped outer wall of the output tube below the support block, and a limiting ring is fixedly connected to the inner wall of the output tube below the third piston block.

[0016] Preferably, the transmission assembly includes a transmission plate, and the transmission plate and the bottom inner wall of the sliding seat are fixedly connected, the bottom outer wall of the transmission plate is fixedly connected with a connecting rod, the bottom outer wall of the connecting rod is rotatably connected with a connecting rod, and a connecting block is fixedly connected to the inner wall of one side of the cabin near the rectangular hole, and the connecting block and the connecting rod are rotatably connected.

[0017] Preferably, the lifting assembly includes a servo motor, a transmission block is rotatably connected to the inner wall at the top of the cabin, and the output shaft of the servo motor is fixedly connected to the transmission block, a connecting seat is slidably connected to the bottom outer wall of the transmission block, a sleeve is fixedly connected to the bottom outer wall of the connecting seat, a screw rod is fixedly connected to the top outer wall of the connecting plate, the screw rod is inserted in the sleeve, and a thread matching the screw rod is opened in the sleeve.

[0018] Preferably, two symmetrically arranged handles are fixedly connected to an outer wall of one side of the rectangular seat.

[0019] Preferably, a cabin door is connected to the outer wall of one side of the cabin body, a horizontally arranged support plate is fixedly connected to the inner wall of the cabin body below the rectangular seat, a horizontally arranged heating plate is fixedly connected to the inner wall of the cabin body below the support plate, both the support plate and the heating plate are porous structures, a heating wire is embedded in the outer wall of the bottom of the heating plate, and two fans are fixedly connected to the inner wall of the bottom of the cabin body.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The present invention provides a sliding seat, a rectangular seat, a placement groove and a sealing component, so that when performing detection work, the phenol reagent for detecting the formaldehyde concentration is poured into a vessel, and then the vessel is placed on a placement table. The sliding seat is raised and lowered to make the vessel containing the phenol reagent rise and pass through the connecting hole on the rectangular seat, and then the sealing component is driven to rise, so that the phenol reagent in the vessel is in direct contact with the gas in the cabin to perform detection work, thereby avoiding the situation where the detection result is biased due to insufficient samples.

[0022] (2) The present invention, through the provision of a transmission assembly, a lifting assembly and a sealing assembly, can achieve the goal of, after the phenol reagent and the gas in the chamber react to a certain degree, driving the sealing assembly to descend through the lifting assembly to seal the placement groove, and then, through the transmission of the transmission assembly, when the rectangular seat is pulled out, driving the sliding seat to descend, thereby separating the sliding seat from the sealing assembly inside the rectangular seat, making it easy to take out the vessel for the next step of detection operation.

[0023] (3) The present invention, through the arrangement of the vacuum assembly, hollow tube, sealing ring and pressure relief assembly, can realize that in the process of separation of the sliding seat and the sealing assembly inside the rectangular seat, the volume of the space formed by the connecting groove and the hollow tube increases, and the air pressure decreases. Under the action of the air pressure, the second piston block is driven to descend along the second through hole. During the descent of the second piston block, the first piston block is driven to descend through the transmission rod, and the gas in the placement groove is sucked into the cavity through the vacuum hole, and then enters the circular groove through the cavity and the third one-way valve, so that only a very small part of the harmful gas in the placement groove enters the inspection workshop, thereby ensuring the air quality of the inspection workshop and protecting the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the cavity and hatch structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the rectangular seat and the sliding seat of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the connecting seat, sleeve and connecting plate of the present invention;

[0029] Figure 5 It is a schematic diagram of the cabin and rectangular seat structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the connecting block, connecting rod, connecting rod and transmission plate of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the sliding seat and the placing table of the present invention;

[0032] Figure 8It is a schematic diagram of the cross-sectional structure of the sleeve of the present invention;

[0033] Fig. 9 The present invention Figure 8 A schematic diagram of the partially enlarged structure at center A;

[0034] Fig.10 It is a schematic diagram of the cross-sectional structure of the sliding seat of the present invention

[0035] Fig.11 It is a schematic diagram of the structure of the cavity, circular groove, first through hole, second through hole and connecting hole of the present invention.

[0036] Reference numerals:

[0037] 1. Cabin; 101. Cabin door; 2. Lifting assembly; 201. Servo motor; 202. Connecting seat; 203. Sleeve; 204. Transmission block; 205. Screw rod; 3. Placement assembly; 301. Handle; 302. Rectangular seat; 303. Sliding seat; 304. Placement table; 305. Connecting groove; 306. Circular groove; 307. First piston block; 308. First one-way valve; 309. Transmission rod; 310. Second piston block; 311. Connecting hole; 312. First through hole; 313. Second one-way valve; 314. Third one-way valve To valve; 315, placement groove; 316, cavity; 317, second through hole; 4, sealing assembly; 401, connecting plate; 402, sealing block; 403, hollow tube; 404, sealing ring; 5, pressure relief assembly; 501, connecting pipe; 502, output pipe; 503, support block; 504, output hole; 505, spring; 506, third piston block; 507, limiting ring; 6, support plate; 7, heating plate; 8, fan; 9, transmission assembly; 901, transmission plate; 902, connecting rod; 903, connecting block; 904, connecting rod. DETAILED DESCRIPTION

[0038] Combine the following Figures 1 to 11 As shown, an embodiment of the present invention provides an adjustable environmental test chamber for detecting harmful gas release, comprising a chamber body 1, a placement component 3, a sealing component 4, a lifting component 2 and a transmission component 9.

[0039] A rectangular hole is provided on the outer wall of one side of the cabin 1, and the placement component 3 is slidably connected to the rectangular hole. The placement component 3 includes a rectangular seat 302 slidably connected in the rectangular hole. Connection holes are provided on one side of the top outer wall and the bottom outer wall of the rectangular seat 302. The same sliding seat 303 is slidably connected in the two connection holes. A placement groove 315 is provided on the top outer wall of the sliding seat 303. A placement table 304 is fixedly connected to the bottom inner wall of the placement groove 315. The placement table 304 is used to place the detection reagent. The sealing component 4 is used to seal the placement groove 315.

[0040] A cavity 316 is provided in the sliding seat 303 below the placement groove 315. A plurality of equally spaced exhaust holes are provided on the inner wall at the bottom of the placement groove 315, and the exhaust holes are all connected to the cavity 316. An exhaust component for extracting the gas inside the placement groove 315 is provided on the inner wall at the bottom of the cavity 316.

[0041] The outer wall of the top of the sliding seat 303 is provided with connecting grooves 305 on both sides of the placement groove 315, and the sealing component 4 is slidably connected to the two connecting grooves 305. A connecting hole 311 is provided inside the sliding seat 303 below the air extraction component, and the connecting hole 311 is connected to the air extraction component and the two connecting grooves 305.

[0042] The lifting assembly 2 is used to drive the sealing assembly 4 to move up and down, and the transmission assembly 9 is used to drive the sliding seat 303 to move up and down.

[0043] Furthermore, the vacuum assembly includes a circular groove 306 formed on the inner wall at the bottom of the cavity 316, a third one-way valve 314 is fixedly connected to the top of the inner wall of the circular groove 306, a first piston block 307 is slidably connected to the inner wall of the circular groove 306 below the third one-way valve 314, two fixed holes are formed on the outer wall at the top of the first piston block 307, a first one-way valve 308 is fixedly connected in both fixed holes, a transmission rod 309 is fixedly connected to the outer wall at the bottom of the first piston block 307, a second piston block 310 is fixedly connected to the outer wall at the bottom end of the transmission rod 309, a second through hole 317 connected to the connecting hole 311 is formed on the outer wall at the bottom of the circular groove 306, and the second piston block 310 is slidably connected in the second through hole 317.

[0044] When the sliding seat 303 and the sealing block 402 are separated, the exhaust component extracts the gas in the placement groove 315 into the cavity 316 and the circular groove 306, thereby preventing a large amount of harmful gas brought out of the placement groove 315 from entering the inspection workshop.

[0045] Furthermore, a first through hole 312 connected to the connecting hole 311 is formed on the inner wall at the bottom of the circular groove 306, and a second one-way valve 313 is fixedly connected to the first through hole 312. During multiple detection operations, the first piston block 307 needs to be raised and lowered multiple times, so that the air pressure below the first piston block 307 in the circular groove 306 increases, and the gas below the first piston block 307 in the circular groove 306 can be timely input into the cabin 1 through the first through hole 312, the connecting hole 311, the connecting groove 305, the hollow tube 403 and the pressure relief assembly 5 through the second one-way valve 313.

[0046] Further, the sealing assembly 4 includes a hollow tube 403 slidably connected in the two connecting grooves 305, the outer walls of the bottom ends of the two hollow tubes 403 are fixedly connected with a sealing ring 404, the arc-shaped outer walls of the two hollow tubes 403 are fixedly connected with the same sealing block 402, the top outer wall of the sealing block 402 is fixedly connected with a connecting plate 401, and the two hollow tubes 403 both penetrate the top outer wall of the connecting plate 401, the top outer wall of the connecting plate 401 is fixedly connected with a pressure relief assembly 5 connected with the two hollow tubes 403, and the pressure relief assembly 5 includes a connecting pipe 501 fixedly connected to the top outer wall of the connecting plate 401, and The connecting tube 501 is connected to the two hollow tubes 403, the output tube 502 is fixedly connected to the top of the arc-shaped outer wall of the connecting tube 501, the support block 503 is fixedly connected to the top of the inner wall of the output tube 502, the spring 505 is fixedly connected to the bottom outer wall of the support block 503, the third piston block 506 is slidably connected to the inner wall of the output tube 502, and the third piston block 506 and the spring 505 are fixedly connected, a plurality of equidistantly distributed output holes 504 are provided on the arc-shaped outer wall of the output tube 502 below the support block 503, and a limiting ring 507 is fixedly connected to the inner wall of the output tube 502 below the third piston block 506.

[0047] When the sealing block 402 descends, the placement groove 315 can be sealed to prevent the internal gas of the cabin body 1 from entering the rectangular seat 302, thereby preventing the internal gas of the cabin body 1 from leaking into the inspection workshop when taking and placing containers. The limiting ring 507 limits the range of the third piston block 506 to descend, thereby ensuring that the internal gas of the cabin body 1 cannot enter the hollow tube 403 through the output pipe 502. At the same time, under the action of the spring 505, the rising height of the third piston block 506 is limited, thereby keeping the air pressure in the hollow tube 403, the connecting groove 305, the connecting hole 311 and the second through hole 317 within a relatively high range, thereby pushing the second piston block 310 to rise and driving the first piston block 307 to reset.

[0048] Furthermore, the transmission assembly 9 includes a transmission plate 901, and the transmission plate 901 is fixedly connected to the bottom inner wall of the sliding seat 303, the bottom outer wall of the transmission plate 901 is fixedly connected to a connecting rod 902, the bottom outer wall of the connecting rod 902 is rotatably connected to a connecting rod 904, and a connecting block 903 is fixedly connected to the inner wall of one side of the cabin 1 near the rectangular hole, and the connecting block 903 and the connecting rod 904 are rotatably connected.

[0049] During the movement of the rectangular seat 302, the connecting rod 904 is rotated around the connecting block 903 through the connecting rod 902. During the rotation, the connecting rod 904 drives the transmission plate 901 to descend through the connecting rod 902, thereby driving the sliding seat 303 to descend, so that the sliding seat 303 descends inside the rectangular seat 302 and separates from the sealing block 402.

[0050] Furthermore, the lifting assembly 2 includes a servo motor 201, a transmission block 204 is rotatably connected to the top inner wall of the cabin body 1, and the output shaft of the servo motor 201 is fixedly connected to the transmission block 204, the bottom outer wall of the transmission block 204 is slidably connected to a connecting seat 202, the bottom outer wall of the connecting seat 202 is fixedly connected to a sleeve 203, the top outer wall of the connecting plate 401 is fixedly connected to a screw rod 205, the screw rod 205 is inserted in the sleeve 203, and a thread matching the screw rod 205 is opened in the sleeve 203.

[0051] When the rectangular seat 302 slides, it drives the sliding seat 303 to move, so that the connecting seat 202 moves along the length direction of the transmission block 204. After the connecting seat 202 is reset, the servo motor 201 can still rotate through the connecting seat 202 and the transmission drive sleeve 203 of the transmission block 204, ensuring the normal lifting function of the connecting plate 401.

[0052] A cabin door 101 is connected to the outer wall of one side of the cabin body 1, and a horizontally arranged support plate 6 is fixedly connected to the inner wall of the cabin body 1 below the rectangular seat 302. A horizontally arranged heating plate 7 is fixedly connected to the inner wall of the cabin body 1 below the support plate 6. Both the support plate 6 and the heating plate 7 have porous structures, and an electric heating wire is embedded in the outer wall at the bottom of the heating plate 7. Two fans 8 are fixedly connected to the inner wall at the bottom of the cabin body 1, and two symmetrically arranged handles 301 are fixedly connected to the outer wall on one side of the rectangular seat 302.

[0053] Place the artificial board sample on the support plate 6, close the cabin door 101, turn on the switches of the heating wire and the fan 8, and the heating wire heats the gas inside the cabin 1 when working. Through the operation of the fan 8, the gas circulates inside the cabin 1, making the temperature inside the cabin 1 more uniform.

[0054] The specific working method is: when conducting the harmful gas release detection work of the artificial board, open the cabin door 101, place the artificial board sample on the support plate 6, close the cabin door 101, turn on the switches of the heating wire and the fan 8, and the heating wire heats the gas inside the cabin 1 when working. Through the operation of the fan 8, the gas circulates inside the cabin 1, so that the temperature inside the cabin 1 is relatively uniform. By controlling the power of the heating wire, the gas inside the cabin 1 is kept at a constant temperature. After heating the artificial board sample for a period of time, the formaldehyde content in the gas inside the cabin 1 is detected. During the detection work, first turn on the servo motor 201 to drive the transmission block 204 to rotate, and the transmission block 204 drives the sleeve 203 to rotate through the connecting seat 202, driving the screw rod 2 05 descends, thereby driving the connecting plate 401 and the sealing block 402 to descend, and the placement groove 315 on the sliding seat 303 is sealed by the sealing block 402, and the connecting hole on the top of the rectangular seat 302 is sealed by the connecting plate 401, and then the rectangular seat 302 is driven to slide along the rectangular hole through the handle 301, and the sliding seat 303 is driven to move when the rectangular seat 302 slides, so that the connecting seat 202 moves along the length direction of the transmission block 204. After the connecting seat 202 is reset, the servo motor 201 can still rotate through the transmission drive sleeve 203 of the connecting seat 202 and the transmission block 204. When the rectangular seat 302 moves, it drives the sliding seat 303 to gradually approach the rectangular hole, which is convenient for taking and placing containers. In the process of the rectangular seat 302 moving, the connecting rod 902 is used to make the connecting rod 90 4 rotates around the connecting block 903. During the rotation process, the connecting rod 904 drives the transmission plate 901 to descend through the connecting rod 902, thereby driving the sliding seat 303 to descend, so that the sliding seat 303 descends inside the rectangular seat 302 and separates from the sealing block 402, leaking out of the placement groove 315 on the sliding seat 303. During the separation process of the sliding seat 303 and the sealing block 402, the volume of the space formed by the connecting groove 305 and the hollow tube 403 increases, and the air pressure decreases. Under the action of the air pressure, the second piston block 310 is driven to descend along the second through hole 317. During the descent of the second piston block 310, the first piston block 307 is driven to descend through the transmission rod 309, so that the air between the first piston block 307 and the third one-way valve 314 in the circular groove 306 is The pressure drop is reduced, and the gas in the cavity 316 is sucked into the circular groove 306 through the third one-way valve 314, and then through the cavity 316 and the air extraction hole at the bottom of the placement groove 315, a negative pressure is generated at the bottom of the placement groove 315, and then a large amount of gas in the placement groove 315 is sucked into the circular groove 306 for storage, so that only a very small part of the harmful gas in the placement groove 315 enters the detection workshop, thereby ensuring the air quality of the detection workshop and protecting the health of the staff. Then, the container containing the phenol reagent is placed on the placement table 304 on the placement groove 315, and the rectangular seat 302 is pushed into the interior of the cabin 1 by the handle 301. Under the action of the connecting rod 904, the connecting block 903, the connecting rod 902 and the transmission plate 901, the sliding seat 303 is driven to rise.The upper surface of the sliding seat 303 is flush with the upper surface of the rectangular seat 302. During the rising process of the sliding seat 303, the volume of the space formed by the connecting groove 305 and the hollow tube 403 is reduced, and the air pressure is increased. Under the action of the spring 505, the rising height of the third piston block 506 is limited, so that the air pressure in the hollow tube 403, the connecting groove 305, the connecting hole 311 and the second through hole 317 is maintained within a relatively high range, thereby pushing the second piston block 310 to rise and driving the first piston block 307 to reset. During the resetting process of the first piston block 307, the air pressure on the first piston block 307 is increased. The first one-way valve 308 allows the gas in the circular groove 306 between the third one-way valve 314 and the first piston block 307 to enter the lower part of the first piston block 307. As the sliding seat 303 continues to rise, the air pressure in the hollow tube 403, the connecting groove 305, the connecting hole 311 and the second through hole 317 continues to rise, compressing the spring 505 so that the third piston block 506 is above the output hole 504. The gas in the hollow tube 403, the connecting groove 305, the connecting hole 311 and the second through hole 317 is output to the interior of the cabin 1 through the output hole 504, thereby avoiding the loss of the gas inside the cabin 1. The servo motor 201, the transmission block 204, the connecting seat 202, the sleeve 203 and the screw rod 205 drive the connecting plate 401 and the sealing block 402 to rise, so that the vessel on the placing table 304 is fully in contact with the gas inside the cabin 1, and the gas flow inside the cabin 1 is coordinated to improve the accuracy of the formaldehyde concentration detection. After the phenol reagent in the vessel reacts with the gas in the cabin 1 for a certain period of time, the same operation is adopted to separate the sliding seat 303 and the sealing block 402 inside the rectangular seat 302, and the spectrometer is coordinated to carry out the next step of formaldehyde concentration detection, and then the electric The power of the hot wire causes the temperature inside the cabin 1 to rise, and the next detection operation is performed. After multiple detection operations using this device, the change in the total amount of gas inside the cabin 1 is within a very small range, and the situation in which the formaldehyde concentration is reduced by taking out the gas sample is also avoided, further ensuring the accuracy of the formaldehyde concentration detection result. Since the vacuum equipment takes a long time to evacuate the space, and it is difficult to control the amount of air pumped, this device reduces the complexity of the operation and improves the work efficiency compared to the vacuum equipment used to evacuate the space where the vessel is located.

Claims

1. An adjustable environmental test chamber for detecting harmful gas release, comprising a chamber body (1), a placement assembly (3), a sealing assembly (4), a lifting assembly (2) and a transmission assembly (9), characterized in that: A rectangular hole is provided on the outer wall of one side of the cabin (1), and the placement component (3) is slidably connected to the rectangular hole, the placement component (3) comprises a rectangular seat (302) slidably connected in the rectangular hole, the top outer wall and the bottom outer wall of the rectangular seat (302) are both provided with connecting holes, the same sliding seat (303) is slidably connected in the two connecting holes, a placement groove (315) is provided on the top outer wall of the sliding seat (303), the bottom inner wall of the placement groove (315) is fixedly connected to a placement table (304), the placement table (304) is used to place the detection reagent, and the sealing component (4) is used to seal the placement groove (315); A cavity (316) is provided in the sliding seat (303) below the placement groove (315); a plurality of equally spaced exhaust holes are provided on the inner wall at the bottom of the placement groove (315); and the exhaust holes are all connected to the cavity (316); and an exhaust assembly for extracting gas from the placement groove (315) is provided on the inner wall at the bottom of the cavity (316); The outer wall of the top of the sliding seat (303) is provided with connecting grooves (305) at both sides of the placement groove (315), and the sealing component (4) and the two connecting grooves (305) are slidably connected. The interior of the sliding seat (303) is provided with a connecting hole (311) below the air extraction component, and the connecting hole (311) is connected to the air extraction component and the two connecting grooves (305); The lifting assembly (2) is used to drive the sealing assembly (4) to move up and down, and the transmission assembly (9) is used to drive the sliding seat (303) to move up and down; The air extraction component comprises a circular groove (306) provided on the inner wall of the bottom of the cavity (316); a third one-way valve (314) is fixedly connected to the top of the inner wall of the circular groove (306); a first piston block (307) is slidably connected to the inner wall of the circular groove (306) below the third one-way valve (314); two fixing holes are provided on the outer wall of the top of the first piston block (307); a first one-way valve (308) is fixedly connected in both the fixing holes; a transmission rod (309) is fixedly connected to the outer wall of the bottom of the first piston block (307); a second piston block (310) is fixedly connected to the outer wall of the bottom end of the transmission rod (309); a second through hole (317) connected to the connecting hole (311) is provided on the outer wall of the bottom of the circular groove (306); and the second piston block (310) is slidably connected in the second through hole (317); The inner wall at the bottom of the circular groove (306) is provided with a first through hole (312) communicating with the communicating hole (311), and a second one-way valve (313) is fixedly connected in the first through hole (312); The sealing assembly (4) comprises a hollow tube (403) slidably connected in two connecting grooves (305); the bottom outer walls of the two hollow tubes (403) are fixedly connected with a sealing ring (404); the arc-shaped outer walls of the two hollow tubes (403) are fixedly connected with a same sealing block (402); the top outer wall of the sealing block (402) is fixedly connected with a connecting plate (401); the two hollow tubes (403) pass through the top outer wall of the connecting plate (401); the top outer wall of the connecting plate (401) is fixedly connected with a pressure relief assembly (5) in communication with the two hollow tubes (403).

2. The adjustable environmental test chamber for detecting harmful gas release according to claim 1, characterized in that: The pressure relief assembly (5) comprises a connecting pipe (501) fixedly connected to the outer wall at the top of the connecting plate (401), and the connecting pipe (501) is connected to the two hollow tubes (403); the top of the arc-shaped outer wall of the connecting pipe (501) is fixedly connected to an output pipe (502); the top of the inner wall of the output pipe (502) is fixedly connected to a support block (503); the bottom outer wall of the support block (503) is fixedly connected to a spring (505); the inner wall of the output pipe (502) is slidably connected to a third piston block (506), and the third piston block (506) and the spring (505) are fixedly connected; a plurality of output holes (504) distributed at equal distances are opened on the arc-shaped outer wall of the output pipe (502) below the support block (503); and a limiting ring (507) is fixedly connected to the inner wall of the output pipe (502) below the third piston block (506).

3. The adjustable environmental test chamber for detecting harmful gas release according to claim 1, characterized in that: The transmission assembly (9) comprises a transmission plate (901), and the transmission plate (901) is fixedly connected to the inner wall of the bottom of the sliding seat (303); the outer wall of the bottom of the transmission plate (901) is fixedly connected to a connecting rod (902); the outer wall of the bottom of the connecting rod (902) is rotatably connected to a connecting rod (904); a connecting block (903) is fixedly connected to the inner wall of one side of the cabin body (1) near the rectangular hole, and the connecting block (903) and the connecting rod (904) are rotatably connected.

4. The adjustable environmental test chamber for detecting harmful gas release according to claim 1, characterized in that: The lifting assembly (2) comprises a servo motor (201), the top inner wall of the cabin body (1) is rotatably connected to a transmission block (204), and the output shaft of the servo motor (201) and the transmission block (204) are fixedly connected, the bottom outer wall of the transmission block (204) is slidably connected to a connecting seat (202), the bottom outer wall of the connecting seat (202) is fixedly connected to a sleeve (203), the top outer wall of the connecting plate (401) is fixedly connected to a screw rod (205), the screw rod (205) is inserted into the sleeve (203), and the sleeve (203) is provided with a thread matching the screw rod (205).

5. The adjustable environmental test chamber for detecting harmful gas release according to claim 1, characterized in that: Two symmetrically arranged handles (301) are fixedly connected to an outer wall of one side of the rectangular seat (302).

6. The adjustable environmental test chamber for detecting harmful gas release according to claim 1, characterized in that: A cabin door (101) is connected to the outer wall of one side of the cabin body (1); a horizontally arranged support plate (6) is fixedly connected to the inner wall of the cabin body (1) below the rectangular seat (302); a horizontally arranged heating plate (7) is fixedly connected to the inner wall of the cabin body (1) below the support plate (6); both the support plate (6) and the heating plate (7) are porous structures; a heating wire is embedded in the outer wall at the bottom of the heating plate (7); and two fans (8) are fixedly connected to the inner wall at the bottom of the cabin body (1).

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