A suspended crucible-type anti-pollution drug testing device for ignition residue.

Abstract

This invention provides a suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue, belonging to the technical field of pharmaceutical testing devices. It includes a shell with a holding groove at its center, into which a graphite crucible is inserted; a heating mechanism including a heating block; a triggering mechanism including a pressure switch; and a pressure-holding mechanism including an air inlet with an exhaust fan inside. The device collects waste gas and replenishes inert gas in real time by controlling the pressure changes inside the testing chamber, ensuring that the internal pressure is always higher than the external pressure. This effectively prevents secondary pollution caused by backflow of external air. Simultaneously, the device constructs a unidirectional inert gas circulation system, combined with a multi-layer filtration structure to trap impurities in the waste gas generated during ignition, thus avoiding pollution of the testing environment by impurity diffusion and achieving the recycling of inert gas.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical testing equipment technology, and in particular to a suspended crucible-type anti-contamination pharmaceutical testing device for ignition residue. Background Technology

[0002] In the field of ignition residue testing for pharmaceuticals, the industry currently commonly uses crucibles in conjunction with various heating devices to complete the ignition operation of pharmaceuticals. The conventional test method is to place the pharmaceutical to be tested in a graphite or ceramic crucible, and then place the crucible directly on a heating device such as an electric heating block, alcohol torch, or muffle furnace for high-temperature ignition. In order to reduce the contamination of the test sample by the external environment, some test devices will add a simple sealing cover to the heating area, and at the same time, exhaust gas generated by ignition will be discharged through natural ventilation or a simple external exhaust device.

[0003] Existing devices for testing residue on ignition in pharmaceutical testing mostly use single bottom heating, resulting in uneven heating of the crucible. Pharmaceuticals tend to adhere to the crucible's sidewalls, preventing complete ignition and directly impacting the accuracy of residue detection. Furthermore, the sealing structure lacks sufficient pressure control, failing to consistently maintain a higher pressure inside the ignition chamber than the outside. This allows outside air to easily flow back into the ignition area, causing oxidation and contamination of the pharmaceutical residue, leading to data inaccuracies. In addition, the exhaust gas treatment lacks a systematic collection and filtration system. Solid impurities generated during ignition can easily diffuse with the airflow or flow back into the ignition chamber, polluting the testing environment and causing secondary contamination of the test samples. Accumulated exhaust gas cannot promptly expel abnormal pressure within the chamber and simultaneously replenish inert gas. Moreover, traditional crucibles are directly placed, easily coming into contact with heating components, causing impurities to detach and further increasing the risk of contamination. Overall, the anti-contamination effect of the testing process is low. Summary of the Invention

[0004] The present invention solves the problems mentioned in the background art by using surround heating to uniformly heat the crucible from all sides, adding a pressure-holding mechanism to maintain a slightly positive pressure in the combustion chamber, and timely removing waste gas with circulating inert gas.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a suspended crucible-type anti-pollution drug testing device for ignition residue, comprising a shell, wherein a holding groove is provided at the center of the shell, and a graphite crucible is inserted into the holding groove. A heating mechanism, comprising a heating block, which is fixedly connected to the bottom of a holding tank and has the same area as the bottom of the holding tank; A triggering mechanism includes a support frame, a groove is provided at the center of the upper surface of the support frame, a pressure column is slidably connected inside the groove, a piston is fixedly connected to the bottom end of the pressure column, the diameter of the groove is the same as the diameter of the piston, and a pressure switch is fixedly connected to the bottom of the groove. A pressure-holding mechanism includes a mounting frame. An air inlet groove is formed on the surface of the mounting frame and extends through the mounting frame. A sealing plate is slidably connected to the side of the mounting frame near the air inlet groove. The area of ​​the sealing plate is larger than that of the air inlet groove. An air inlet is fixedly connected to the upper end of the air inlet groove, and an exhaust fan is provided inside the air inlet.

[0006] Preferably, a bracket is fixedly connected to the outer surface of the housing, a support leg is fixedly connected to the bottom of the bracket, a sealing cap is snapped onto the upper end of the housing, an air intake chamber is opened at the bottom of the housing, an air intake pipe is inserted into the bottom of the air intake chamber, an air intake channel is opened on the upper side of the housing above the air intake chamber, the air intake channel is interconnected with the air intake chamber, and the mounting bracket is fixedly connected to the interior of the air intake channel at the end away from the air intake chamber.

[0007] Preferably, a dust collection chamber is provided on the side of the housing away from the air inlet chamber, and an exhaust air duct is provided on the upper end of the housing on the side of the dust collection chamber. The exhaust air duct is connected to the dust collection chamber. The dust collection chamber and the air inlet chamber are located on the same horizontal plane. A filter screen is fixedly connected to the housing in the middle of the dust collection chamber and the air inlet chamber. A through groove is provided on the side of the dust collection chamber away from the filter screen, and a cover plate is snapped into the inside of the through groove.

[0008] Preferably, a heat-conducting block is fixedly connected to the side of the heating block of the housing, a heat-conducting groove is opened on the side of the housing located in the holding groove, a heat-conducting plate is fixedly connected inside the heat-conducting groove, and an adhesive block is fixedly connected to the side wall of the heat-conducting groove near the holding groove.

[0009] Preferably, waste inlet grooves are provided on both sides of the surface of the support frame, the waste inlet grooves penetrate the support frame, a pressure plate is fixedly connected to the top of the pressure column, a return spring is wound around the surface of the pressure column, and a transmission rack is provided on the side wall of the pressure column.

[0010] Preferably, a rotating wheel is rotatably connected inside the waste inlet tank, a baffle is fixedly connected to the surface of the rotating wheel, a transmission gear is fixedly connected to the outer surface of the rotating wheel, and a torsion spring is elastically connected inside the rotating wheel.

[0011] Preferably, the mounting bracket has a horizontal groove on the side of the air intake slot, the horizontal groove is connected to the air intake slot, the sealing plate is slidably connected inside the horizontal groove, an electromagnet is fixedly connected inside the sealing plate, a push-out spring is fixedly connected to one end of the sealing plate near the bottom of the horizontal groove, a magnetic block is fixedly connected to the bottom of the horizontal groove, and a second pressure switch is fixedly connected to the bottom of the horizontal groove.

[0012] Preferably, the air intake chamber and the dust collection chamber are interconnected by a filter screen, the filter screen has multiple layers, and the support frame is fixedly connected inside the air intake and exhaust duct, and the diameter of the support frame is the same as that of the air intake and exhaust duct.

[0013] Preferably, one end of the heat-conducting block is connected to the heating block, and the end of the heat-conducting block away from the heating block is connected to the heat-conducting plate, and the bonding block is a copper sheet.

[0014] Preferably, the transmission rack meshes with the transmission gear, and the length and width of the baffle are the same as those of the waste inlet trough.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, waste gas collection and inert gas replenishment are completed in real time by changing the air pressure inside the test chamber, ensuring that the air pressure inside the test chamber is always higher than that outside, effectively preventing secondary pollution caused by backflow of outside air. At the same time, the device constructs a one-way circulation system for inert gas, which, together with a multi-layer filtration structure, intercepts impurities in the waste gas generated by combustion. This not only avoids the pollution of the test environment by the diffusion of impurities, but also realizes the recycling of inert gas, reducing resource consumption during the test. In addition, the entire device is automatically triggered without the need for real-time manual intervention, reducing the operational difficulty for test personnel and improving the standardization of test operations and overall test efficiency.

[0016] 2. In this invention, a multi-directional heating structure achieves uniform heating of the entire crucible, allowing the drug to burn completely and avoiding incomplete burning caused by the drug adhering to the crucible wall. This significantly improves the detection accuracy of the ignition residue test. At the same time, the device adopts a sealed test chamber design, which, together with the filling of inert gas, creates an oxygen-free test environment, fundamentally preventing the oxidation of drug residue. Furthermore, the plug-in placement of the crucible reduces unnecessary contact with the heating components, lowering the probability of contact contamination and further ensuring the authenticity and reliability of the test results. Attached Figure Description

[0017] Figure 1 This invention provides a frontal three-dimensional structural diagram of the overall equipment in a suspended crucible-type anti-pollution drug testing ignition residue test device. Figure 2 This invention provides a front cross-sectional view of the shell and graphite crucible in a suspended crucible-type anti-pollution drug testing ignition residue test device. Figure 3 This invention provides a frontal three-dimensional structural diagram of the shell in a suspended crucible-type anti-pollution drug testing ignition residue test device. Figure 4 This invention provides a front cross-sectional plan view of the shell in a suspended crucible-type anti-pollution drug testing ignition residue test device. Figure 5This invention provides a front cross-sectional plan view of the triggering mechanism in a suspended crucible-type anti-pollution drug testing device for ignition residue. Figure 6 This invention proposes a suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue. Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This invention provides a front sectional view of the pressure-holding mechanism in a suspended crucible-type anti-pollution drug testing device for ignition residue. Figure 8 This invention proposes a suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue. Figure 7 A magnified structural diagram at point B.

[0018] Legend: 100, Shell; 101, Support; 102, Sealing cover; 103, Container tank; 104, Air inlet chamber; 105, Air inlet pipe; 106, Air inlet duct; 107, Exhaust air inlet duct; 108, Dust collection chamber; 109, Filter screen; 110, Cover plate; 200, Heating mechanism; 201, Heating block; 202, Heat-conducting block; 203, Heat-conducting groove; 204, Heat-conducting plate; 205, Adhesive block; 300, Triggering mechanism; 301, Support frame; 302, Exhaust air inlet tank; 303 304. Slide groove; 305. Pressure column; 306. Pressure plate; 307. Transmission rack; 308. Return spring; 309. Baffle; 300. Rotary wheel; 310. Transmission gear; 311. Torsion spring; 312. Pressure switch No. 1; 400. Pressure holding mechanism; 401. Mounting bracket; 402. Air inlet groove; 403. Air inlet; 404. Horizontal groove; 405. Sealing plate; 406. Electromagnet; 407. Ejection spring; 408. Magnetic block; 409. Pressure switch No. 2; 500. Graphite crucible. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0021] like Figure 2 As shown, a suspended crucible-type anti-pollution drug testing ignition residue test device includes a shell 100, a holding groove 103 is opened at the center of the shell 100, and a graphite crucible 500 is inserted into the holding groove 103. like Figures 1-2 As shown, a bracket 101 is fixedly connected to the outer surface of the shell 100, and a support leg is fixedly connected to the bottom of the bracket 101. A sealing cover 102 is snapped onto the upper end of the shell 100, and the sealing cover 102 seals the upper end of the shell 100, making the holding tank 103 a sealed space. A heating mechanism 200 is provided at the bottom of the holding tank 103, and the heating mechanism 200 heats and burns the graphite crucible 500 inside the holding tank 103. An air inlet chamber 104 is opened at the bottom of the shell 100, and an air inlet pipe 105 is inserted into the bottom of the air inlet chamber 104. The outer end of the air inlet pipe 105 is connected to a nitrogen or argon inert gas tank to fill the air inlet chamber 104. like Figure 2 and Figure 4 As shown, the housing 100 has an air intake duct 106 on the upper side of the air intake chamber 104. The air intake duct 106 is connected to the air intake chamber 104. The mounting bracket 401 is fixedly connected to the interior of the end of the air intake duct 106 away from the air intake chamber 104. The air inside the air intake chamber 104 enters the interior of the air intake duct 106 and then enters the interior of the mounting bracket 401. like Figure 4 As shown, a dust collection chamber 108 is provided on the side of the shell 100 away from the air inlet chamber 104. An exhaust air duct 107 is provided at the upper end of the shell 100 on the side of the dust collection chamber 108. The exhaust air duct 107 is connected to the dust collection chamber 108 and to the holding tank 103. When the flue gas generated by the burning of the graphite crucible 500 enters the interior of the dust collection chamber 108 through the exhaust air duct 107. like Figure 3 and Figure 4 As shown, the dust collection chamber 108 and the air intake chamber 104 are located on the same horizontal plane. The housing 100 is fixedly connected to the filter screen 109 in the middle of the dust collection chamber 108 and the air intake chamber 104. A through groove is opened on the side of the dust collection chamber 108 away from the filter screen 109. A cover plate 110 is snapped into the inside of the through groove. The air inside the dust collection chamber 108 enters the interior of the air intake chamber 104 through the filter screen 109, maintaining the pressure inside the dust collection chamber 108. Furthermore, the air intake pipe 105 is provided with a one-way valve inside, and the one-way valve faces the inside of the air intake chamber 104. The air intake duct 106 is provided with a one-way valve facing the side of the mounting bracket 401 inside, and the exhaust air duct 107 is provided with a one-way valve facing the dust collection chamber 108 inside. When the inert gas enters the storage tank 103 from the inside of the inlet duct 106, and then enters the exhaust duct 107 from the storage tank 103, and then enters the dust collection chamber 108 through the exhaust duct 107, a one-way circulating airflow is formed inside the shell 100 to collect the combustion exhaust gas in the graphite crucible 500.

[0022] It should be noted that, in order to prevent outside air from flowing back into the combustion chamber during the combustion process, it is necessary to ensure that the air pressure inside the combustion chamber is greater than the outside air pressure. To address this, a triggering mechanism 300 is installed inside the housing 100 to recover the exhaust gas inside the combustion chamber, while a pressure-maintaining mechanism 400 is triggered to maintain the air pressure inside the combustion chamber. like Figures 4-5 As shown, the triggering mechanism 300 includes a support frame 301, which is fixedly connected to the inside of the waste air inlet duct 107. The diameter of the support frame 301 is the same as that of the waste air inlet duct 107. The support frame 301 blocks the waste air inlet duct 107 to maintain stable air pressure inside the holding tank 103. like Figure 5 As shown, a groove 303 is provided at the center of the upper surface of the support frame 301. A pressure column 304 is slidably connected inside the groove 303. A piston is fixedly connected to the bottom end of the pressure column 304. The diameter of the groove 303 is the same as the diameter of the piston. A pressure switch 312 is fixedly connected to the bottom of the groove 303. When the waste gas generated by the chemical residue inside the graphite crucible 500 during the burning process increases, the gas pressure at the upper end of the support frame 301 increases. The piston at the bottom of the pressure column 304 moves downward under the action of pressure and presses the pressure switch 312 at the bottom of the groove 303. like Figure 5 As shown, waste inlet grooves 302 are provided on both sides of the surface of the support frame 301. The waste inlet grooves 302 penetrate the support frame 301. A pressure plate 305 is fixedly connected to the top of the pressure column 304. A return spring 307 is wound around the surface of the pressure column 304. A transmission rack 306 is provided on the side wall of the pressure column 304. During the downward movement of the pressure column 304, it needs to overcome the elastic force of the return spring 307 to move downward. like Figures 5-6 As shown, a rotating wheel 309 is rotatably connected inside the waste inlet trough 302. A baffle 308 is fixedly connected to the surface of the rotating wheel 309. A transmission gear 310 is fixedly connected to the outer surface of the rotating wheel 309. A torsion spring 311 is elastically connected inside the rotating wheel 309. A transmission rack 306 meshes with the transmission gear 310. The length and width of the baffle 308 are the same as those of the waste inlet trough 302. When the pressure column 304 moves downward, the transmission rack 306 on its side can mesh with the transmission gear 310 to drive the rotating wheel 309 to rotate. At this time, the baffle 308 rotates accordingly, opening the waste inlet trough 302 that it was blocking. The waste gas can enter the interior of the waste inlet duct 107 through the waste inlet trough 302 to achieve the collection of waste gas. like Figure 4 and Figure 7As shown, the pressure holding mechanism 400 includes a mounting bracket 401, which is fixedly connected to the inside of the air intake duct 106 and has the same diameter as the air intake duct 106, thus blocking the air intake duct 106. An air intake groove 402 is provided on the surface of the mounting bracket 401, which penetrates the mounting bracket 401. When the air intake groove 402 is opened, air can enter the interior of the holding tank 103 through the air intake groove 402, maintaining the air pressure inside the holding tank 103. like Figure 7 As shown, a sealing plate 405 is slidably connected to the side of the mounting bracket 401 near the air inlet slot 402. The area of ​​the sealing plate 405 is larger than that of the air inlet slot 402. An air inlet 403 is fixedly connected to the upper end of the air inlet slot 402. An exhaust fan is provided inside the air inlet 403. The exhaust fan inputs the air inside the air inlet slot 402 into the storage slot 103. The movement of the sealing plate 405 can block or open the air inlet slot 402. like Figure 7 As shown, the mounting bracket 401 has a horizontal groove 404 on the side of the air intake groove 402. The horizontal groove 404 is connected to the air intake groove 402. The sealing plate 405 is slidably connected inside the horizontal groove 404 and can seal the air intake groove 402. like Figures 7-8 As shown, an electromagnet 406 is fixedly connected inside the sealing plate 405. A push-out spring 407 is fixedly connected to one end of the sealing plate 405 near the bottom of the transverse groove 404. A magnetic block 408 is fixedly connected to the bottom of the transverse groove 404. The magnetic block 408 and the electromagnet 406 have opposite magnetic poles at their proximal ends. The electromagnet 406 is connected to the first pressure switch 312 via a wire. When the first pressure switch 312 is pressed, the electromagnet 406 is energized, and the electromagnet 406 and the magnetic block 408 attract each other. The sealing plate 405 is driven to slide into the transverse groove 404, and at this time the air inlet groove 402 is opened. like Figure 4 and Figure 8 As shown, a second pressure switch 409 is fixedly connected to the bottom of the transverse groove 404. When the sealing plate 405 slides to the bottom of the transverse groove 404 and presses the second pressure switch 409 at the bottom, the second pressure switch 409 is connected to the exhaust fan inside the air inlet 403 through a wire. At this time, the exhaust fan works to discharge the inert gas inside the air inlet 106 into the interior of the holding tank 103.

[0023] Furthermore, when the heating block 201 at the bottom of the holding tank 103 heats the graphite crucible 500, the gas generated by the burning of the medicine is discharged into the space between the shell 100 and the sealing cover 102. At this time, the gradually increasing gas pressure causes the pressure on the piston to exceed the elastic force of the return spring 307. The pressure column 304 slides into the interior of the slide groove 303. At the same time as the baffle 308 is opened to block the waste inlet 302, the first pressure switch 312 at the bottom of the slide groove 303 is pressed. At this time, the electromagnet 406 is energized and generates magnetism. The attraction between the electromagnet 406 and the magnetic block 408 causes the sealing plate 405 to separate from the air inlet 402. The exhaust fan inside the air inlet 403 works synchronously, forming a unidirectional circulating airflow inside the shell 100 to discharge the waste gas generated by the burning of the graphite crucible 500 and simultaneously replenish new inert gas. Furthermore, the waste gas entering the dust collection chamber 108 passes through the filter screen 109, which adsorbs impurities in the waste gas and recirculates it along with the inert gas, thus achieving the collection of internal waste gas while maintaining stable internal air pressure.

[0024] It should be noted that uneven heating of the graphite crucible 500 may occur during combustion, resulting in some chemicals not being fully burned, which affects the accuracy of the experiment. To address this issue, a heating mechanism 200 is added to the side of the holding tank 103. like Figure 4 As shown, the heating mechanism 200 includes a heating block 201, which is a tube furnace with an external power supply. The heating block 201 is fixedly connected to the bottom of the holding tank 103 and has the same area as the bottom area of ​​the holding tank 103, so as to uniformly heat the bottom of the graphite crucible 500. like Figure 4 As shown, a heat-conducting block 202 is fixedly connected to the side of the heating block 201 on the shell 100. One end of the heat-conducting block 202 is connected to the heating block 201. A heat-conducting groove 203 is opened on the side of the holding tank 103 on the shell 100. The heat-conducting groove 203 surrounds the holding tank 103. A heat-conducting plate 204 is fixedly connected inside the heat-conducting groove 203. The end of the heat-conducting block 202 away from the heating block 201 is connected to the heat-conducting plate 204. The heating block 201 conducts heat to the inside of the heat-conducting plate 204 through the heat-conducting block 202. The heat-conducting plate 204 is placed in a ring inside the heat-conducting groove 203, so that the side wall of the holding tank 103 can be heated simultaneously, avoiding the medicine from adhering to the graphite crucible wall 500 and thus not being able to burn completely. like Figure 4 As shown, a bonding block 205 is fixedly connected to the side wall of the heat conduction groove 203 near the holding groove 103. The bonding block 205 is a copper sheet. The bonding block 205 further conducts heat and improves the heating uniformity of the graphite crucible 500.

[0025] Working principle: The drug to be tested is placed in the graphite crucible 500, which is then inserted into the holding groove 103 in the center of the shell 100. The sealing cap 102 is snapped onto the upper end of the shell 100, so that the holding groove 103 forms a sealed drug burning chamber. The bracket 101 provides overall support for the shell 100. The gas inlet pipe 105 is connected to an inert gas tank such as nitrogen or argon to provide an inert gas source for the device.

[0026] The heating block 201 of the heating mechanism 200 is fixed to the bottom of the holding tank 103, directly and uniformly heating the bottom of the graphite crucible 500. The heat generated by the heating block 201 is conducted through the heat-conducting block 202 to the heat-conducting plate 204 in the heat-conducting groove 203 on the side wall of the holding tank 103. The heat-conducting groove 203 is arranged around the holding tank 103. The heat of the heat-conducting plate 204 is further conducted to the side wall of the graphite crucible 500 through the copper bonding block 205 on the side of the heat-conducting groove 203 near the holding tank 103. This achieves all-round uniform heating of the bottom and side wall of the graphite crucible 500, avoids the problem of insufficient burning caused by the drug adhering to the crucible wall, and ensures the accuracy of the test.

[0027] The exhaust gas generated during the burning of the medicine causes the air pressure inside the sealed cavity of the holding tank 103 to gradually increase. The high-pressure gas acts on the pressure plate 305 at the top of the pressure column 304 on the support frame 301 inside the exhaust duct 107. When the pressure of the air on the pressure plate 305 exceeds the elastic force of the return spring 307 on the surface of the pressure column 304, the pressure column 304 slides downward along the slide groove 303 of the support frame 301, and its bottom piston directly presses the first pressure switch 312 at the bottom of the slide groove 303. The transmission rack 306 on the side wall of the pressure column 304 meshes with the transmission gear 310 outside the rotating wheel 309 inside the waste inlet trough 302, driving the rotating wheel 309 to rotate against the elastic force of the internal torsion spring 311, causing the baffle 308 on the surface of the rotating wheel 309 to rotate synchronously, opening the waste inlet trough 302 that was originally blocked by the baffle 308, and the burning waste gas in the holding tank 103 enters the waste inlet air duct 107 through the waste inlet trough 302, and finally flows into the dust collection bin 108 of the shell 100.

[0028] When pressure switch 312 is pressed, the electromagnet 406 inside the sealing plate 405 of the pressure-holding mechanism 400 is energized. The electromagnet 406 and the magnetic block 408 at the bottom of the transverse groove 404 are opposite poles; energization generates an attractive force, causing the sealing plate 405 to slide downwards along the transverse groove 404 and compress the ejector spring 407, thus separating the sealing plate 405 from the air inlet slot 402 of the mounting bracket 401, opening the air inlet slot 402. The sealing plate 405 then slides... When the gas reaches the bottom of the horizontal groove 404, press the second pressure switch 409 directly to trigger the exhaust fan inside the air inlet 403 at the upper port of the air inlet groove 402 to work. The air inlet pipe 105 is then introduced into the air inlet chamber 104, and then the inert gas is transported to the air inlet groove 402 through the air inlet channel 106. The gas is then quickly discharged into the sealed cavity of the holding tank 103 to replenish the gas in the cavity in real time, ensuring that the gas pressure inside the burning chamber is always higher than the external gas pressure, and preventing the backflow of external air from causing contamination of the medicine residue.

[0029] One-way valves are installed in the air inlet pipe 105, air inlet channel 106, and exhaust air inlet channel 107 to form a one-way circulating airflow of inert gas inside the shell 100, from the air inlet chamber 104 to the air inlet channel 106, from the air inlet channel 106 to the holding tank 103, from the holding tank 103 to the exhaust air inlet channel 107, and from the exhaust air inlet channel 107 to the dust collection chamber 108. This continuously carries the burning exhaust gas out of the holding tank 103. A multi-layer filter screen 109 is fixedly connected between the dust collection chamber 108 and the air inlet chamber 104. When the exhaust gas in the dust collection chamber 108 flows through the filter screen 109, the solid impurities are adsorbed and trapped by the filter screen 109. The filtered inert gas re-enters the air inlet chamber 104 to participate in the circulation, realizing the recycling of inert gas. After the test is completed, the cover plate 110 on the outside of the dust collection chamber 108 can be opened to clean the trapped impurities.

[0030] When the air pressure in the holding tank 103 returns to normal, the spring force of the reset spring 307 pushes the pressure column 304 to slide upward along the slide groove 303 to reset. The transmission rack 306 drives the transmission gear 310 to rotate in the opposite direction. The torsion spring 311 resets, causing the baffle 308 to re-seal the waste inlet tank 302. After the first pressure switch 312 resets, the electromagnet 406 is de-energized. The spring force of the push-out spring 407 pushes the sealing plate 405 to slide upward along the transverse groove 404 to re-seal the air inlet tank 402. The second pressure switch 409 resets, causing the exhaust fan to stop working, and the device returns to its initial state.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue, characterized in that: Includes a shell (100), and a holding groove (103) is provided at the center of the interior of the shell (100), and a graphite crucible (500) is inserted into the interior of the holding groove (103). Heating mechanism (200), the heating mechanism (200) includes heating block (201), the heating block (201) is fixedly connected to the bottom of the holding tank (103), and the area is the same as the bottom area of ​​the holding tank (103); A triggering mechanism (300) includes a support frame (301). A groove (303) is provided at the center of the upper surface of the support frame (301). A pressure column (304) is slidably connected inside the groove (303). A piston is fixedly connected to the bottom end of the pressure column (304). The diameter of the groove (303) is the same as the diameter of the piston. A pressure switch (312) is fixedly connected to the bottom of the groove (303). A pressure holding mechanism (400) includes a mounting bracket (401). The surface of the mounting bracket (401) is provided with an air inlet groove (402) that penetrates the mounting bracket (401). A sealing plate (405) is slidably connected to the side of the mounting bracket (401) near the air inlet groove (402). The area of ​​the sealing plate (405) is larger than that of the air inlet groove (402). An air inlet (403) is fixedly connected to the upper port of the air inlet groove (402). An exhaust fan is provided inside the air inlet (403).

2. The suspended crucible-type anti-pollution drug testing ignition residue test device according to claim 1, characterized in that: A bracket (101) is fixedly connected to the outer surface of the housing (100). A support leg is fixedly connected to the bottom of the bracket (101). A sealing cap (102) is snapped onto the upper end of the housing (100). An air intake chamber (104) is opened at the bottom of the housing (100). An air intake pipe (105) is inserted into the bottom of the air intake chamber (104). An air intake channel (106) is opened on the upper side of the housing (100) above the air intake chamber (104). The air intake channel (106) is interconnected with the air intake chamber (104). The mounting bracket (401) is fixedly connected to the interior of the air intake channel (106) at the end away from the air intake chamber (104).

3. The suspended crucible-type anti-pollution drug testing ignition residue test device according to claim 2, characterized in that: A dust collection chamber (108) is provided on the side of the housing (100) away from the air inlet chamber (104). An exhaust air duct (107) is provided on the upper end of the housing (100) on the side of the dust collection chamber (108). The exhaust air duct (107) is connected to the dust collection chamber (108). The dust collection chamber (108) and the air inlet chamber (104) are located on the same horizontal plane. A filter screen (109) is fixedly connected between the housing (100) and the dust collection chamber (108) and the air inlet chamber (104). A through groove is provided on the side of the dust collection chamber (108) away from the filter screen (109). A cover plate (110) is snapped into the inside of the through groove.

4. The suspended crucible-type anti-pollution drug testing ignition residue test device according to claim 1, characterized in that: A heat-conducting block (202) is fixedly connected to the side of the heating block (201) of the housing (100). A heat-conducting groove (203) is opened on the side of the housing (100) of the holding tank (103). A heat-conducting plate (204) is fixedly connected inside the heat-conducting groove (203). A bonding block (205) is fixedly connected to the side wall of the heat-conducting groove (203) near the holding tank (103).

5. The suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue as described in claim 1, characterized in that: Waste inlet grooves (302) are provided on both sides of the surface of the support frame (301), the waste inlet grooves (302) penetrate the support frame (301), a pressure plate (305) is fixedly connected to the top of the pressure column (304), a return spring (307) is wound around the surface of the pressure column (304), and a transmission rack (306) is provided on the side wall of the pressure column (304).

6. The suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue as described in claim 5, characterized in that: The waste inlet trough (302) is rotatably connected to a wheel (309), a baffle (308) is fixedly connected to the surface of the wheel (309), a transmission gear (310) is fixedly connected to the outer surface of the wheel (309), and a torsion spring (311) is elastically connected to the inside of the wheel (309).

7. The suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue as described in claim 1, characterized in that: The mounting bracket (401) has a horizontal groove (404) on the side of the air inlet groove (402). The horizontal groove (404) is connected to the air inlet groove (402). The sealing plate (405) is slidably connected inside the horizontal groove (404). An electromagnet (406) is fixedly connected inside the sealing plate (405). A push-out spring (407) is fixedly connected to one end of the sealing plate (405) near the bottom of the horizontal groove (404). A magnetic block (408) is fixedly connected to the bottom of the horizontal groove (404). A second pressure switch (409) is fixedly connected to the bottom of the horizontal groove (404).

8. The suspended crucible-type anti-pollution pharmaceutical testing device for ignition residue as described in claim 3, characterized in that: The air intake chamber (104) and the dust collection chamber (108) are interconnected by a filter screen (109), which has multiple layers. The support frame (301) is fixedly connected inside the exhaust duct (107), and the diameter of the support frame (301) is the same as that of the exhaust duct (107).

9. The suspended crucible-type anti-pollution drug testing ignition residue test device according to claim 4, characterized in that: One end of the heat-conducting block (202) is connected to the heating block (201), and the end of the heat-conducting block (202) away from the heating block (201) is connected to the heat-conducting plate (204). The bonding block (205) is a copper sheet.

10. The suspended crucible-type anti-pollution drug testing ignition residue test device according to claim 6, characterized in that: The transmission rack (306) meshes with the transmission gear (310), and the length and width of the baffle (308) are the same as those of the waste inlet trough (302).

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