Testing device of gas alarm

Abstract

The invention relates to the technical field of gas detection, and discloses a gas alarm testing device which comprises a gas alarm testing machine body and an adaptive detection box. By arranging the sealing assembly, the cover plate and the base in the sealing assembly not only can effectively block gas leakage in the feeding and taking-out process, but also can resist interference of external gas, so that potential safety hazards are greatly reduced, and the personal safety of operators and the stability of a test environment are guaranteed; structures such as an inclined surface and a slope of an external expansion plate are also arranged, stirring blades and a vortex-shaped track of a turntable are matched, the inclined surface guides gas to directionally and rapidly flow into a sealing assembly in an initial test stage, and meanwhile, certain sealing performance is kept to rapidly establish a stable gas concentration environment; and after the subsequent convex block is separated from the groove, the slope further promotes the gas to flow around and be mixed, so that the gas concentration around the alarm is highly consistent with the overall concentration in the detection box, the detection error caused by non-uniform gas distribution is reduced, and the test efficiency and accuracy are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of gas detection, and in particular relates to a testing device for a gas alarm. Background Art

[0002] In the field of gas detection, performance testing of alarms is crucial to ensuring the safety of production and life. The accuracy, sensitivity, reliability and other performance indicators of the alarm directly determine whether it can issue an effective alarm at the first time of danger. If the alarm is not accurate enough, false alarms or missed alarms may occur, which may cause safety hazards.

[0003] At present, common gas detection equipment on the market has obvious defects in the delivery and removal of alarms. On the one hand, when the alarm is delivered to the test box and when the alarm is taken out after the test is completed, the opening structure of the equipment is difficult to achieve effective sealing, which can easily cause the test gas in the test box to leak, posing a threat to the personal safety of the operator; on the other hand, when the alarm is delivered to the test box, its surface will carry gas from the external environment, and the composition and concentration of the external gas are often different from the preset test gas concentration in the test box. This makes it difficult for the gas concentration in the test box to quickly reach a stable and uniform state in the initial stage of the test, resulting in inconsistency between the gas concentration around the alarm and the overall concentration in the test box, affecting the test results.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A gas alarm testing device comprises a gas alarm testing machine body and an adapted detection box.

[0006] A gas concentration sensor is installed inside the detection box; The detection box is equipped with a sealing assembly, which includes a plurality of pairs of columns and expansion plates arranged alternately around each other, a cover plate and a base being installed on the top and bottom of the columns respectively, the expansion plates being slidably connected to the columns and the inner walls of the expansion plates, and a positioning assembly for locating the position of the gas alarm body being installed on the bottom of the cover plate; One end of the outer expansion plate is provided with an inclined surface for guiding the gas flow into the detection box, and the other end is provided with a protrusion, and the protrusion is adapted to the groove opened in the side wall of the column. The inner side wall of the outer expansion plate is provided with a slope for guiding the gas flow in the sealing assembly; A turntable is rotatably mounted on the base, a vortex track for driving the outward expansion plate to move outward and open the sealing component is mounted on the turntable, and a stirring blade for circling flow is mounted on the rotation center of the turntable.

[0007] As a preferred embodiment of the present invention, a base is installed at the bottom of the gas alarm test machine body, a pair of parallel support frames are installed on the base, a connecting pipe connected to the gas compensation system in the gas alarm test machine body is installed on the side wall of the detection box, and the gas concentration sensor is electrically connected to the gas alarm test machine body.

[0008] As a preferred embodiment of the present invention, a through hole is opened on the detection box, an O-ring gasket is installed on the inner wall of the through hole, and the sealing component is cylindrical, the outer diameter of the cylinder is adapted to the inner diameter of the through hole, and the stirring blade is placed inside the detection box.

[0009] As a preferred embodiment of the present invention, positioning frames are installed on the inner side walls of several pairs of the columns, positioning plates are installed on the positioning frames, the positioning plates are placed above the turntable, and the gas alarm body is overlapped on the top of the positioning plates.

[0010] As a preferred embodiment of the present invention, the positioning assembly includes a force storage cover, a baffle is slidingly provided inside the force storage cover, a force storage rod is installed on the baffle, and the force storage rod is movably connected to the force storage cover, a top plate is installed at the bottom of the force storage rod, and the top plate is squeezed on the surface of the gas alarm body, a force storage spring is provided inside the force storage cover, one end of the force storage spring is clamped on the baffle, and the other end is clamped on the force storage cover, and the compression direction of the force storage spring and the moving direction of the force storage rod are on the same straight line.

[0011] As a preferred embodiment of the present invention, a driving motor is installed inside the gas alarm testing machine body, a sleeve shaft is installed on the driving motor, and the sleeve shaft movably passes through the detection box, a plug shaft is movably inserted inside the sleeve shaft, and the plug shaft is interconnected with the rotation center of the stirring blade, a synchronization shaft is installed on the top of the plug shaft, the synchronization shaft movably passes through the base, and the synchronization shaft is interconnected with the rotation center of the turntable.

[0012] As a preferred embodiment of the present invention, a slider is meshedly provided on the spiral track, a connecting plate is installed on the side wall of the slider, and the end of the connecting plate is connected to the corresponding side wall of the outward expansion plate.

[0013] As a preferred embodiment of the present invention, a slide plate is installed at the bottom of the connecting plate, a limit rod is movably provided on the slide plate, limit seats are installed at both ends of the limit rod, the limit seat is installed at the bottom of the base, a limit spring is sleeved on the limit rod, one end of the limit spring is clamped on the slide plate, and the other end of the limit spring is clamped on the limit seat.

[0014] As a preferred embodiment of the present invention, a handle is installed on the top of the cover plate, an anti-slip groove is installed on the handle, a pressure plate is installed on the side wall of the cover plate, a guide rod is provided through the pressure plate, the bottom of the guide rod is installed on the detection box, a guide plate is installed on the top of the guide rod, a compression spring is sleeved on the guide rod, one end of the compression spring is clamped on the side wall of the guide plate, and the other end of the compression spring is clamped on the pressure plate.

[0015] As a preferred embodiment of the present invention, a connecting seat is installed on the pressure plate, a card plate is rotatably installed on the connecting seat, and the card plate is overlapped above the guide plate, and a card slot for unlocking and separating is opened on the card plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with a sealing assembly, in which the cover and base in the sealing assembly can not only effectively block gas leakage during the feeding and taking out process, but also resist interference from external gas, greatly reducing safety hazards, ensuring the personal safety of operators and the stability of the test environment; and is also provided with structures such as inclined surfaces and slopes of the outer expansion plate, which cooperate with the stirring blades and the turntable vortex track. In the initial stage of the test, the inclined surface guides the gas to flow into the sealing assembly in a directional and rapid manner, while maintaining a certain sealing to quickly establish a stable gas concentration environment; after the subsequent separation of the protrusion and the groove, the slope further promotes the gas flow and mixing. Compared with the traditional simple open air intake method, the gas concentration around the alarm is highly consistent with the overall concentration in the detection box, reducing the detection error caused by uneven gas distribution, and significantly improving the test efficiency and accuracy.

[0017] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached figure: Figure 1 A three-dimensional structural diagram of a gas alarm test device; Figure 2 This is an overall diagram of a test device for a gas alarm; Figure 3 A test device for a gas alarm Figure 2 Enlarged view of point A in the middle; Figure 4 A cross-sectional view of a test box of a gas alarm test device; Figure 5 A part of a test device for a gas alarm Figure 1 ; Figure 6 A part of a test device for a gas alarm Figure 2 ; Figure 7A part of a test device for a gas alarm Figure 3 ; Figure 8 A part of a test device for a gas alarm Figure 4 ; Figure 9 The present invention is a flow chart of the movement of an expansion plate of a test device for a gas alarm.

[0019] In the picture: 1. Gas alarm tester body; 11. Base; 111. Support frame; 12. Test box; 121. Connecting pipe; 122. Gas concentration sensor; 123. Through hole; 2. Column; 21. Cover plate; 211. Handle; 22. Base; 23. Energy storage cover; 231. Baffle; 232. Energy storage rod; 233. Top plate; 234. Energy storage spring; 24. Positioning plate; 241. Positioning bracket; 242. Gas alarm body; 25. Expansion plate; 251. Inclined surface; 252. Slope; 253. Bump; 254. Groove; 3. Drive motor; 31. Sleeve shaft; 311. Insert shaft; 32. Mixing blade; 33. Turntable; 331. Synchronous shaft; 332. Vortex track; 333. Slider; 334. Connecting plate; 335. Slide plate; 336. Limit rod; 337. Limit spring; 338. Limit seat; 4. Guide rod; 41. Guide plate; 411. Compression spring; 412. Pressure plate; 42. Clamping plate; 421. Clamping slot; 422. Connecting seat. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0021] Example 1: like Figures 1 to 9 As shown, a gas alarm testing device includes a gas alarm testing machine body 1 and an adapted detection box 12.

[0022] A gas concentration sensor 122 is installed inside the detection box 12; A sealing assembly is installed on the detection box 12. The sealing assembly includes several pairs of columns 2 and expansion plates 25 arranged alternately around each other. The top and bottom of the columns 2 are respectively installed with a cover plate 21 and a base 22. The expansion plate 25 is slidably connected to the inner wall of the column 2 and the expansion plate 25. A positioning assembly for positioning the gas alarm body 242 is installed at the bottom of the cover plate 21; One end of the expansion plate 25 is equipped with an inclined surface 251 for directing the flow of gas into the test chamber, and the other end is equipped with a bump 253, which is adapted to fit into a groove 254 on the side wall of the column 2. The inner wall of the expansion plate 25 is equipped with a slope 252 for guiding the flow of gas in the sealing assembly. A turntable 33 is rotatably mounted on the base 22. The turntable 33 is equipped with a vortex track 332 for driving the expansion plate 25 outward and opening the sealing assembly. The center of rotation of the turntable 33 is equipped with a stirring blade 32 for circumferential flow. This structure allows the combination of inclined surface 251 and groove 254 to accurately control the flow rate and direction during the initial stage of gas introduction, preventing disordered gas diffusion from affecting test accuracy. When the seal assembly is fully opened to begin the test phase, bevel 251 and slope 252 form a continuous flow path, guiding the gas to continuously circulate within the seal assembly and prevent gas deposition. The continuous rotation of stirring blade 32 not only quickly establishes a stable gas concentration environment, but also provides continuous stirring throughout the test, ensuring uniform gas concentration and preventing detection deviations caused by gas stratification. Compared to traditional test devices, this design is used throughout the entire test process, significantly shortening test preparation time and significantly improving the stability and reliability of test data, thereby enhancing overall test efficiency and quality.

[0023] like Figures 1 to 9 As shown, in a specific embodiment, a base 11 is mounted at the bottom of the gas alarm tester body 1, on which a pair of parallel support frames 111 are mounted. A connecting pipe 121 connected to the gas compensation system in the gas alarm tester body 1 is mounted on the side wall of the test box 12. A gas concentration sensor 122 is electrically connected to the gas alarm tester body 1. The linkage between the connecting pipe 121 and the gas compensation system allows the gas concentration in the test box to be adjusted in real time according to test requirements, effectively simulating a variety of complex gas environments. This greatly expands the application scenarios of the device, making it suitable for both routine testing and special operating condition testing.

[0024] like Figures 1 to 9 As shown, the detection box 12 is further provided with a through hole 123, an O-ring gasket is installed on the inner wall of the through hole 123, and the sealing component is cylindrical, the outer diameter of the cylinder is adapted to the inner diameter of the through hole 123, and the stirring blade 32 is placed inside the detection box 12. The O-ring gasket and the precisely adapted cylindrical structure can improve the sealing effect, significantly improve the reliability of the test data, reduce the risk of error caused by gas leakage, and provide a solid guarantee for high-precision testing.

[0025] Example 2: The difference between the above embodiment and this embodiment is that: Figures 1 to 9As shown, positioning frames 241 are installed on the inner side walls of several pairs of columns 2, and positioning plates 24 are installed on the positioning frames 241. The positioning plates 24 are placed above the turntable 33, and the gas alarm body 242 is overlapped on the top of the positioning plates 24.

[0026] like Figures 1 to 9 As shown, in a specific embodiment, the positioning assembly includes a force storage cover 23, a baffle 231 is slidably provided inside the force storage cover 23, a force storage rod 232 is mounted on the baffle 231, and the force storage rod 232 is movably connected to the force storage cover 23, a top plate 233 is mounted on the bottom of the force storage rod 232, and the top plate 233 is pressed against the surface of the gas alarm body 242, and a force storage spring 234 is provided inside the force storage cover 23, one end of the force storage spring 234 is clamped on the baffle 231, and the other end is clamped on the force storage cover 23, and the compression direction of the force storage spring 234 and the movement direction of the force storage rod 232 are both on the same straight line. This positioning assembly can adapt to gas alarms of different specifications through the elastic adaptive adjustment of the force storage spring 234, and can also maintain stable clamping under test vibration environment. Compared with the traditional rigid fixing method, it effectively avoids damage to the alarm caused by external force impact, and improves the compatibility and protection of the device.

[0027] like Figures 1 to 9 As shown, further, a driving motor 3 is installed inside the gas alarm tester body 1, and a sleeve shaft 31 is installed on the driving motor 3. The sleeve shaft 31 movably penetrates the detection box 12. An insert shaft 311 is movably inserted inside the sleeve shaft 31, and the insert shaft 311 is interconnected with the rotation center of the stirring blade 32. A synchronization shaft 331 is installed on the top of the insert shaft 311. The synchronization shaft 331 movably penetrates the base 22 and is interconnected with the rotation center of the turntable 33. This multi-axis linkage structure realizes the efficient reuse of the driving source, simplifies the power system of the device, and reduces energy consumption and maintenance costs. At the same time, the precise shaft system coordination ensures the synchronous operation of the stirring blade 32 and the turntable 33, ensures the coordination of gas circulation and the opening and closing of the sealing component, and improves the stability of the test process.

[0028] Example 3: The difference between the above embodiment and this embodiment is that: Figures 1 to 9As shown, a slider 333 is meshed with the vortex track 332. A connecting plate 334 is mounted on the side wall of the slider 333. The end of the connecting plate 334 is connected to the corresponding side wall of the expansion plate 25. A slide plate 335 is mounted on the bottom of the connecting plate 334. A limit rod 336 is movably provided through the slide plate 335. The limit rod 336 is mounted on both ends of the limit seat 338. The limit seat 338 is mounted on the bottom of the base 22. A limit spring 337 is sleeved on the limit rod 336. One end of the limit spring 337 is clamped to the slider 335, and the other end of the limit spring 337 is clamped to the limit seat 338. The transmission design of the vortex track 332 and the slider 333 achieves smooth and precise control of the opening and closing of the sealing assembly. Compared with traditional mechanical structures, the opening and closing process is smoother and mechanical wear is reduced. The buffering effect of the limit spring 337 effectively absorbs the impact force during movement, extending the service life of the device, while reducing operating noise and optimizing the operating environment.

[0029] like Figures 1 to 9 As shown, in a specific embodiment, a handle 211 is installed on the top of the cover plate 21, and an anti-slip groove is installed on the handle 211. A pressure plate 412 is installed on the side wall of the cover plate 21. A guide rod 4 is installed through the pressure plate 412. The bottom of the guide rod 4 is installed on the detection box 12. A guide plate 41 is installed on the top of the guide rod 4. A compression spring 411 is sleeved on the guide rod 4. One end of the compression spring 411 is clamped to the side wall of the guide plate 41, and the other end of the compression spring 411 is clamped to the pressure plate 412. The combined design of the handle 211 and the compression spring 411 makes the installation and removal of the sealing assembly more convenient and labor-saving. It can be completed quickly by one person. Compared with the traditional cumbersome disassembly method, it significantly improves operating efficiency and reduces labor costs. The guiding structure of the guide rod 4 and the guide plate 41 ensures the precise alignment of the sealing assembly, further enhancing the sealing effect.

[0030] like Figures 1 to 9 As shown, the pressure plate 412 is further mounted with a connection seat 422, on which a clamping plate 42 is rotatably mounted. The clamping plate 42 overlaps the guide plate 41 and is provided with a slot 421 for unlocking and separating. The secure locking design of the clamping plate 42 and the slot 421 effectively prevents the seal assembly from accidentally loosening or falling off during testing, ensuring the safety of operators and equipment. At the same time, the convenient unlocking mechanism does not affect the normal requirement for rapid disassembly and assembly, achieving a balance between safety and operability.

[0031] The implementation principle of the test device for a gas alarm of the present invention is as follows: When the gas alarm body 242 is placed inside the sealing assembly, the positioning assembly begins to work. When the cover plate 21 of the sealing assembly is installed, the cover plate 21 is moved downward, and the force storage cover 23 then drops, and the top plate 233 first contacts the surface of the gas alarm body 242. As the cover plate 21 continues to move downward, the force storage spring 234 is compressed under the action of the baffle 231, and the force storage rod 232 drives the top plate 233 to squeeze the gas alarm body 242 with a stable and moderate pressure, firmly fixing it in the designated position of the positioning plate 24. The advantage of this design is that it ensures that the alarm will not be displaced during the test due to factors such as airflow disturbances and component operation, thereby ensuring that the alarm is always in the best detection position, laying the foundation for subsequent precise testing.

[0032] After the alarm is positioned, the retaining plate 42 on the pressure plate 412 mounted on the side wall of the cover 21 overlaps the guide plate 41 mounted on the top of the guide rod 4. The retaining groove 421 of the retaining plate 42 is in a non-aligned state, thus fixing the position of the sealing assembly. When a test operation is required, the retaining plate 42 is rotated so that the retaining groove 421 of the retaining plate 42 aligns with the guide plate 41. The retaining plate 42 loses its restraining effect on the sealing assembly, achieving unlocking and separation. Driven by the elastic force of the compression spring 411 sleeved on the guide rod 4, the pressure plate 412 drives the sealing assembly downward as a whole, and the cover 21 of the sealing assembly gradually aligns with the through hole 123 of the detection box 12.

[0033] At the start of the test, the drive motor 3 installed within the gas alarm tester body 1 starts, rotating the stirring blade 32 via the sleeve shaft 31 and the plug shaft 311. Simultaneously, the sleeve shaft 31 rotates the synchronizing shaft 331, which in turn rotates the turntable 33 mounted on the base 22. The vortex track 332 mounted on the turntable 33 starts to drive the engaged slider 333 to move. The slider 333 drives the outward expansion plate 25 through the connecting plate 334, opening the sealing assembly.

[0034] In the initial stage, the end of the expansion plate 25 with the inclined surface 251 is first connected to the internal chamber of the detection box 12. At this time, the protrusion 253 of the expansion plate 25 is still in contact with the groove 254 on the side wall of the column 2. The advantage of this design is that the inclined surface 251 can guide the gas in the detection box 12 to flow into the sealing component at a specific angle, forming a directional airflow, so that the gas can quickly and evenly reach the vicinity of the gas alarm. At the same time, the contact between the protrusion 253 and the groove 254 ensures that the sealing component can still maintain a certain degree of sealing during the initial gas flow, preventing excessive gas leakage, helping to quickly establish a stable gas concentration environment within the sealing component, and improving testing efficiency and accuracy.

[0035] As the turntable 33 continues to rotate, the expansion plate 25 continues to move outward, and the protrusion 253 separates from the groove 254. At this time, the sealing assembly is in a fully open state. The advantages of this design are: on the one hand, the slope 252 installed on the inner wall of the expansion plate 25 can further guide the gas to form a vortex inside the sealing assembly, enhancing the gas mixing effect and making the gas concentration around the alarm more consistent with the overall gas concentration in the detection box 12; on the other hand, the fully open structure facilitates the smooth discharge of gas from the sealing assembly after being detected by the gas alarm, forming a good gas circulation, and preventing the accumulation of gas after detection in the sealing assembly, which may affect subsequent test results.

[0036] During the entire test process, the stirring blade 32 rotates continuously, constantly stirring the gas in the detection box 12, causing the gas near the alarm to be fully mixed with the gas inside the detection chamber, ensuring that the gas near the alarm is consistent with the gas content inside the detection chamber, thereby ensuring that the gas alarm can accurately detect the real and uniform gas concentration, and realize accurate testing of the gas alarm performance.

[0037] During the entire test process, the gas concentration sensor 122 installed inside the detection box 12 monitors the gas concentration inside the detection box in real time and transmits the data to the gas alarm tester body 1. The gas alarm body 242 detects the gas in the sealing component. When the gas concentration detected by the alarm reaches or exceeds the preset alarm threshold, the alarm triggers the alarm mechanism to sound an alarm. The detection results fed back by the gas alarm are compared and analyzed with the data monitored by the gas concentration sensor 122. The advantage of this detection method is that through double data verification, it can accurately determine whether the gas alarm can accurately detect the internal gas and alarm. If the data of the two are consistent or within the allowable error range, it indicates that the gas alarm can work accurately and meet the performance standards; otherwise, it means that the alarm has a detection deviation and needs further debugging or is judged as an unqualified product, thereby achieving an accurate assessment of the detection accuracy and alarm reliability of the gas alarm.

Claims

1. A gas alarm test device, comprising a gas alarm tester body (1) and a matching test box (12), characterized in that: A gas concentration sensor (122) is installed inside the detection box (12); A sealing assembly is installed on the detection box (12), and the sealing assembly includes a plurality of pairs of columns (2) and expansion plates (25) arranged alternately around each other, a cover plate (21) and a base (22) are installed on the top and bottom of the column (2), respectively, the expansion plate (25) is slidably connected to the column (2) and the inner wall of the expansion plate (25), and a positioning assembly for positioning the position of the gas alarm body (242) is installed on the bottom of the cover plate (21); One end of the outer expansion plate (25) is provided with an inclined surface (251) for guiding the flow of gas into the detection box, and the other end is provided with a protrusion (253), and the protrusion (253) is adapted to the groove (254) provided on the side wall of the column (2), and the inner side wall of the outer expansion plate (25) is provided with a slope (252) for guiding the flow direction of gas in the sealing assembly; A turntable (33) is rotatably mounted on the base (22), a vortex track (332) for driving the outward expansion plate (25) to move outward and open the sealing assembly is mounted on the turntable (33), and a stirring blade (32) for circumferential flow is mounted on the rotation center of the turntable (33).

2. A gas alarm testing device according to claim 1, characterized in that: The gas alarm test machine body (1) is provided with a base (11) at the bottom thereof, a pair of mutually parallel support frames (111) being provided on the base (11), a connecting pipe (121) connected to a gas compensation system in the gas alarm test machine body (1) being provided on a side wall of the detection box (12), and the gas concentration sensor (122) being electrically connected to the gas alarm test machine body (1).

3. A gas alarm testing device according to claim 1, characterized in that: The detection box (12) is provided with a through hole (123), an O-shaped gasket is installed on the inner wall of the through hole (123), and the sealing component is cylindrical, the outer diameter of the cylinder and the inner diameter of the through hole (123) are mutually adapted, and the stirring blade (32) is placed inside the detection box (12).

4. A gas alarm testing device according to claim 1, characterized in that: A positioning frame (241) is installed on the inner side walls of several pairs of the uprights (2), a positioning plate (24) is installed on the positioning frame (241), the positioning plate (24) is placed above the turntable (33), and a gas alarm body (242) is overlapped on the top of the positioning plate (24).

5. A gas alarm testing device according to claim 1, characterized in that: The positioning assembly includes a force storage cover (23), a baffle (231) is slidably provided inside the force storage cover (23), a force storage rod (232) is installed on the baffle (231), and the force storage rod (232) is movably connected to the force storage cover (23), a top plate (233) is installed at the bottom of the force storage rod (232), and the top plate (233) is pressed on the surface of the gas alarm body (242), and a force storage spring (234) is provided inside the force storage cover (23), one end of the force storage spring (234) is clamped on the baffle (231), and the other end is clamped on the force storage cover (23), and the compression direction of the force storage spring (234) and the movement direction of the force storage rod (232) are both on the same straight line.

6. A gas alarm testing device according to claim 1, characterized in that: A driving motor (3) is installed inside the gas alarm tester body (1), a sleeve shaft (31) is installed on the driving motor (3), and the sleeve shaft (31) movably penetrates the detection box (12), an insert shaft (311) is movably inserted inside the sleeve shaft (31), and the insert shaft (311) and the rotation center of the stirring blade (32) are mutually connected, a synchronization shaft (331) is installed on the top of the insert shaft (311), the synchronization shaft (331) movably penetrates the base (22), and the synchronization shaft (331) and the rotation center of the turntable (333) are mutually connected.

7. A gas alarm testing device according to claim 1, characterized in that: A slider (333) is meshedly provided on the vortex track (332), a connecting plate (334) is installed on the side wall of the slider (333), and the end of the connecting plate (334) is interconnected with the side wall of the corresponding outward expansion plate (25).

8. A gas alarm testing device according to claim 7, characterized in that: A slide plate (335) is installed at the bottom of the connecting plate (334), a limit rod (336) is movably provided on the slide plate (335), limit seats (338) are installed at both ends of the limit rod (336), the limit seat (338) is installed at the bottom of the base (22), a limit spring (337) is sleeved on the limit rod (336), one end of the limit spring (337) is clamped on the slide plate (335), and the other end of the limit spring (337) is clamped on the limit seat (338).

9. A gas alarm testing device according to claim 1, characterized in that: A handle (211) is installed on the top of the cover plate (21), and an anti-slip groove is installed on the handle (211). A pressure plate (412) is installed on the side wall of the cover plate (21), and a guide rod (4) is provided through the pressure plate (412). The bottom of the guide rod (4) is installed on the detection box (12), and a guide plate (41) is installed on the top of the guide rod (4). A compression spring (411) is sleeved on the guide rod (4), and one end of the compression spring (411) is clamped on the side wall of the guide plate (41), and the other end of the compression spring (411) is clamped on the pressure plate (412).

10. A gas alarm testing device according to claim 9, characterized in that: A connecting seat (422) is mounted on the pressing plate (412), a clamping plate (42) is rotatably mounted on the connecting seat (422), the clamping plate (42) is overlapped above the guide plate (41), and a clamping slot (421) for unlocking and separating is provided on the clamping plate (42).

Images