Waste gas filtering device for cable combustion experiment

Abstract

The invention relates to the technical field of cable testing, in particular to a cable combustion experiment waste gas filtering device which comprises a vertically-arranged filtering cylinder, a filtering part, a liquid storage tank and a switching mechanism. A second mounting cylinder and an extrusion cylinder which are coaxial and are arranged at an interval are inserted into the first mounting cylinder; the filtering part is of a double-layer annular elastic structure and is provided with an outer-layer annular part and an inner-layer annular part, the connecting part between the outer-layer annular part and the inner-layer annular part is clamped between the second mounting cylinder and the extrusion cylinder, and the outer-layer annular part is inserted between the first mounting cylinder and the second mounting cylinder; the inner-layer annular part is inserted into the second mounting cylinder; treating fluid is stored in the liquid storage tank; and the switching mechanism is used for enabling the outer-layer annular part and the inner-layer annular part to be mutually switched, so that the invalid treatment liquid is extruded out of the filtering part through the second mounting barrel and the extrusion barrel, and self-cleaning of the filtering part can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable testing, in particular to a cable combustion experiment waste gas filtering device. BACKGROUND

[0002] The cable is a device for transmitting and distributing electric energy or signal, which is usually composed of several or several groups of wires and wrapped in an insulating protective layer, and is an important part of various electrical systems.

[0003] During the use of the cable, the occurrence of fire may be caused by the risks such as unreliable connection, carbonization path arc, air arc, external heat source, wire core overheating and short circuit, and the fire caused by the cable is often accompanied by the generation of a large amount of smoke and harmful gas, which not only affects the safety of the human body, but also pollutes the environment and causes property loss; therefore, in order to study the fire risk caused by the cable, it is necessary to conduct a combustion experiment on the cable.

[0004] During the cable combustion experiment, a large amount of smoke, toxic gas and combustion products will be generated by the cable combustion, and if these waste gases are directly discharged to the external environment, it will inevitably pollute the environment; in order to reduce the pollution to the external environment, the waste gas generated by the cable combustion is usually purified by filtering equipment before being discharged, and in the related technology, for example, a cable flame-retardant testing device is disclosed in Chinese patent CN213689507U, in which the harmful gas and smoke generated by the cable combustion is diffused upward under the influence of high temperature, the baffle on the air guide pipe is used to prevent the gas from flowing to the outside through the air guide pipe, the control panel controls the work of the fan, the harmful gas enters the air suction pipe from the air suction port, and after passing through the fan, it is sent into the water absorption tank through the air pipe, and the dust and impurities in the smoke are filtered by the filter screen.

[0005] Although the above-mentioned cable flame-retardant testing device can purify the waste gas to a certain extent, it is found in actual use that after a long time of use, various impurities will be attached to the filter screen, which will cause the filtering effect of the filter screen to be poor, and after the filter screen is blocked, it needs to be replaced or cleaned, and during the replacement or cleaning of the filter screen, the experiment cannot be carried out, thereby affecting the test efficiency of the cable combustion. SUMMARY

[0006] Therefore, it is necessary to provide a cable combustion experiment waste gas filtering device in view of the poor working continuity in the current cable combustion experiment waste gas treatment process.

[0007] The above-mentioned purpose is realized by the following technical scheme: A cable combustion experiment waste gas filtering device, comprising: The vertical filter cartridge is provided with a partition tube, an air inlet and an air outlet, the air inlet is communicated with the filter cartridge, the air outlet is communicated with the partition tube, the partition tube is provided with a first mounting tube, and the first mounting tube is provided with a first through hole; the first mounting tube is provided with a second mounting tube and an extrusion tube which are coaxial and arranged at intervals, the second mounting tube is provided with a second through hole; the first mounting tube and the second mounting tube are provided with a first telescopic stop ring and a second telescopic stop ring; The filter part is provided as a double-layer annular elastic structure and has an outer annular part and an inner annular part, and a connecting part between the outer annular part and the inner annular part is clamped between the second mounting tube and the extrusion tube; the outer annular part is clamped between the first mounting tube and the second mounting tube and connected through the first telescopic stop ring and the first mounting tube; the inner annular part is clamped in the second mounting tube and connected through the second telescopic stop ring and the second mounting tube; The liquid storage tank is arranged on the filter cartridge and stores treatment liquid therein, and the treatment liquid is configured to absorb impurity particles and harmful components in exhaust gas; The conversion mechanism is configured to convert the outer annular part and the inner annular part to each other, so as to extrude the invalid treatment liquid from the filter part through the second mounting tube and the extrusion tube.

[0008] Further, the conversion mechanism comprises a first elastic member and a moving assembly, the first elastic member is connected between the first mounting tube and the outer annular part, and the outer annular part has a tendency to move upward along the axis direction of the first mounting tube under the action of the first elastic member; the moving assembly is configured to provide driving force for the inner annular part to move upward and downward along the axis direction of the mounting tube.

[0009] Further, the moving assembly comprises a worm, a worm wheel and a rack, the worm and the worm wheel are arranged on the first mounting tube and can rotate, and the worm and the worm wheel are engaged; the rack is partially clamped in the second mounting tube and extends along the axis direction of the second mounting tube, one end of the rack is fixedly connected to the inner annular part; the worm wheel is coaxially and fixedly provided with a gear, and the gear and the rack are engaged.

[0010] Further, the cable combustion experiment exhaust gas filtering device further comprises a locking mechanism, which is configured to lock the conversion ratio between the outer annular part and the inner annular part when the filtering part has the maximum filtering efficiency during the conversion of the outer annular part and the inner annular part.

[0011] Further, the first mounting cylinder can slide along the axial direction of the separation pipe; the locking mechanism comprises a second elastic member, a ratchet, a ratchet block and a friction ball, the second elastic member is connected between the filtering cylinder and the first mounting cylinder, and the first mounting cylinder has a tendency to move upward along the axial direction of the filtering cylinder under the action of the second elastic member; the ratchet is fixedly inserted into the inner circumferential wall of the separation pipe and extends along the axial direction of the separation pipe; the ratchet block is arranged on the first mounting cylinder and can elastically slide along the radial direction of the first mounting cylinder and can be in one-way cooperation with the ratchet, so that the first mounting cylinder can only move downward along the axial direction of the filtering cylinder; the friction ball is movably inserted into the worm, and under the action of centrifugal force, the friction ball can move to frictionally contact with the ratchet block and drive the ratchet block to move towards or away from the ratchet when the worm rotates.

[0012] Further, the locking mechanism further comprises a third elastic member, which is connected between the ratchet block and the first mounting cylinder, and the ratchet block has a tendency to move towards the ratchet under the action of the third elastic member.

[0013] Further, the moving assembly further comprises a driving member configured to provide a driving force for the rotation of the worm.

[0014] Further, the extrusion cylinder is provided with a communication hole, which communicates the extrusion cylinder and the filtering cylinder, and a one-way valve is inserted into the communication hole, and the opening direction of the one-way valve is from the extrusion cylinder to the filtering cylinder.

[0015] Further, the cable combustion experiment exhaust gas filtering device further comprises a gas guiding part, and under the action of the gas guiding part, the exhaust gas entering from the gas inlet can move in the circumferential direction.

[0016] Further, the cable combustion experiment exhaust gas filtering device further comprises a barrier part, which is inserted into the filtering cylinder and located below the first mounting cylinder, and the barrier part is configured to block the splashing of the treatment liquid at the bottom of the filtering cylinder; a third through hole is formed in the barrier part.

[0017] The beneficial effects of the present application are: The cable combustion experiment waste gas filtering device provided by the application can realize double filtration of the waste gas through the outer annular part and the inner annular part, and can realize coarse-to-fine filtration of the waste gas, thereby improving the filtration effect and realizing pollution-free emission.

[0018] Further, the locking mechanism is arranged to lock the conversion ratio between the outer annular part and the inner annular part when the filtration part has the maximum filtration efficiency during the mutual conversion of the outer annular part and the inner annular part, so that the filtration part always has the maximum filtration efficiency according to the impurity particle content in the waste gas, thereby improving the test efficiency of the cable combustion experiment.

[0019] Further, the air guide part is arranged to enable the waste gas entering from the air inlet to move in the circumferential direction, so that the waste gas can be filtered by the filtration part in the form of uniform circumferential arrangement, thereby improving the filtration efficiency and utilization rate of the filtration part.

[0020] Further, the blocking part is arranged to block the treatment liquid at the bottom of the filter cylinder from being splashed by the waste gas, thereby avoiding adhesion to the first mounting cylinder and affecting the passage of the waste gas through the first through hole. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The perspective structural schematic view of the cable combustion experiment waste gas filtering device provided by an embodiment of the application is shown in the figure. Figure 2 The top view structural schematic view of the cable combustion experiment waste gas filtering device provided by an embodiment of the application is shown in the figure. Figure 3 The Figure 2 The sectional view of A-A in the figure. Figure 4 The Figure 3 The local enlarged structural schematic view of B in the figure. Figure 5 The Figure 3 The local enlarged structural schematic view of C in the figure. Figure 6A front view structural schematic diagram of a cable combustion experiment waste gas filtering device provided by an embodiment of the present application is shown in the figure. Figure 7 A Figure 6 A D-D cross-sectional view is shown in the figure. Figure 8 A Figure 6 A E-E cross-sectional view is shown in the figure. Figure 9 A perspective sectional view structural schematic diagram of a cable combustion experiment waste gas filtering device provided by an embodiment of the present application is shown in the figure. Figure 10 A Figure 9 A local enlarged structural schematic diagram at F is shown in the figure.

[0022] Wherein: 1, filter cartridge; 101, air inlet; 102, air outlet; 11, partition pipe; 12, first mounting cylinder; 121, first through hole; 122, support; 123, liquid receiving seat; 1231, liquid receiving port; 124, limiting seat; 125, support seat; 13, second mounting cylinder; 131, second through hole; 14, extrusion cylinder; 15, first telescopic stop ring; 16, second telescopic stop ring; 17, mounting seat; 171, liquid receiving hole; 18, flow guide part; 181, flow guide channel; 19, plugging plug; 2, filter part; 21, outer annular part; 22, inner annular part; 23, connecting part; 3, liquid storage tank; 4, conversion mechanism; 41, first tension spring; 42, moving assembly; 421, worm; 4211, mounting groove; 422, worm gear; 423, rack; 424, gear; 425, drive motor; 5, locking mechanism; 51, second tension spring; 52, ratchet; 53, ratchet block; 54, friction ball; 55, third tension spring; 6, air guide part; 7, blocking part. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application clearer and more apparent, the present application is further described in detail below by embodiments, and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0024] The ordinal numbers of components in the present document, such as "first", "second", etc., are merely intended for differentiating between the described objects, and do not have any sequential or technical meaning. The "connection" or "coupling" in the present document, unless otherwise specified, includes both direct and indirect connection (coupling). In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter-clockwise", etc., indicate the orientation or positional relationship shown in the drawings, and are merely intended for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation of the present application.

[0025] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of a first feature to a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] As Figures 1 to 10As shown, the cable combustion experiment waste gas filtering device provided by the embodiment of the application is used for absorbing waste gas generated in the process of cable combustion experiment, and is arranged to include a vertical filter cylinder 1, a filter part 2, a liquid storage tank 3 and a conversion mechanism 4, wherein the filter cylinder 1 is internally inserted with a partition pipe 11, the filter cylinder 1 is provided with an air inlet 101 and an air outlet 102, the air inlet 101 is communicated with the filter cylinder 1, the air outlet 102 is communicated with the partition pipe 11, the partition pipe 11 is internally inserted with a first mounting cylinder 12, the first mounting cylinder 12 is provided with a first through hole 121; the first mounting cylinder 12 is internally inserted with a second mounting cylinder 13 and an extrusion cylinder 14 which are coaxial and arranged at intervals, the second mounting cylinder 13 is provided with a second through hole 131; the first mounting cylinder 12 and the second mounting cylinder 13 are inserted with a first telescopic stop ring 15, the second mounting cylinder 13 is internally inserted with a second telescopic stop ring 16; the filter part 2 is arranged as a double-layer annular elastic structure and has an outer annular part 21 and an inner annular part 22, a connecting part 23 between the outer annular part 21 and the inner annular part 22 is clamped between the second mounting cylinder 13 and the extrusion cylinder 14; the outer annular part 21 is inserted between the first mounting cylinder 12 and the second mounting cylinder 13 and is connected through the first telescopic stop ring 15 and the first mounting cylinder 12; the inner annular part 22 is inserted in the second mounting cylinder 13 and is connected through the second telescopic stop ring 16 and the second mounting cylinder 13; the liquid storage tank 3 is arranged on the filter cylinder 1 and stores treatment liquid therein, the liquid storage tank 3 is configured to be able to provide the treatment liquid to the filter part 2, and the treatment liquid is configured to be able to absorb impurity particles and harmful components in the waste gas; the conversion mechanism 4 is configured to be able to convert the outer annular part 21 and the inner annular part 22 to each other, so as to extrude the invalid treatment liquid from the filter part 2 through the second mounting cylinder 13 and the extrusion cylinder 14.

[0027] Specifically in the embodiment, as shown in the drawings, Figure 1 The upper part of the filter cylinder 1 is arranged as a box body structure, the lower part is arranged as a cylinder body structure, the air inlet 101 is arranged on the rear side wall of the box body structure of the filter cylinder 1, and the air outlet 102 is arranged on the front side wall of the box body structure of the filter cylinder 1; as shown in the drawings, Figure 3As shown, the partition pipe 11 and the filter cylinder 1 are coaxially arranged, the top end is fixedly connected to the inner top wall of the filter cylinder 1, and the bottom end is suspended; the first mounting cylinder 12 is coaxially inserted into the partition pipe 11 during installation, the top is open, is in communication with the partition pipe 11, the bottom is suspended, and the first through hole 121 is provided in plurality on the circumferential side wall of the first mounting cylinder 12; the second mounting cylinder 13 is coaxially inserted into the first mounting cylinder 12 during installation, the top is fixedly connected to the inner top wall of the first mounting cylinder 12, the top of the second mounting cylinder 13 is open, is in communication with the partition pipe 11, the bottom is open and suspended, and the second through hole 131 is provided in plurality on the circumferential side wall of the second mounting cylinder 13; the extrusion cylinder 14 is coaxially inserted into the first mounting cylinder 12 during installation, and the bottom is fixedly connected to the inner bottom wall of the first mounting cylinder 12, and the top is open.

[0028] As shown in Figure 3 The first telescopic blocking ring 15 is coaxially inserted between the first mounting cylinder 12 and the second mounting cylinder 13 during installation, the top is fixedly connected to the inner top wall of the first mounting cylinder 12, the bottom is fixedly connected to the top of the outer annular portion 21, and can be telescopic along the axis direction, the setting of the first telescopic blocking ring 15 makes the exhaust gas entering between the first mounting cylinder 12 and the second mounting cylinder 13 only pass through the outer annular portion 21 and the second through hole 131 in sequence to enter the second mounting cylinder 13; the second telescopic blocking ring 16 is coaxially inserted into the second mounting cylinder 13 during installation, the top is fixedly connected to the inner top wall of the second mounting cylinder 13, the bottom is fixedly connected to the top of the inner annular portion 22, and can be telescopic along the axis direction, the setting of the second telescopic blocking ring 16 makes the exhaust gas entering the second mounting cylinder 13 only pass through the inner annular portion 22 to be discharged from the gas outlet 102.

[0029] As shown in Figure 3 The cross-sectional shape of the filter part 2 is U-shaped, the outer annular portion 21 is located on the outside, the inner annular portion 22 is located on the inside, and the transition section between the outer annular portion 21 and the inner annular portion 22 is the connecting portion 23, wherein the outer annular portion 21 is located on the outside, has a larger diameter and a smaller thickness, and can coarsely filter the exhaust gas; the inner annular portion 22 is located on the inside, has a smaller diameter and a larger thickness, and can finely filter the exhaust gas.

[0030] It can be understood that the filter part 2 can be composed of cotton material.

[0031] It can be understood that the filter part 2 can also be structured by taking elastic metal mesh as support and taking cotton as filter material.

[0032] In order to facilitate the installation of the liquid storage tank 3, as shown inFigure 3 As shown in the figure, the mounting seat 17 is fixedly arranged at the top of the filter cartridge 1, and the liquid storage tank 3 is arranged to be mounted on the mounting seat 17 with the tank opening downward. The liquid receiving hole 171 is arranged at the top of the mounting seat 17, and the liquid receiving hole 171 is communicated with the tank opening of the liquid storage tank 3. In order to facilitate the guiding of the treatment liquid in the liquid storage tank 3 to the filter part 2, the flow guide part 18 is inserted in the partition pipe 11. The flow guide part 18 is arranged to be composed of a reverse T-shaped rotary body structure and a strip-shaped flow guide structure. The rotary body structure is arranged to be composed of a vertically arranged disc-shaped part and a tubular part. The cross-sectional shape of the disc-shaped part is arranged to be C-shaped, and the opening is downward. The flow guide part 18 is arranged to be inserted into the inner top wall of the filter cartridge 1 with the top of the tubular part during installation, and is communicated with the liquid receiving hole 171. The first flow groove extending in the radial direction and penetrating the tubular part is arranged on the top end surface of the disc-shaped part. The flow guide structure is vertically arranged at the bottom of the disc-shaped part. The strip-shaped second flow groove is arranged outside the flow guide structure. The second flow groove and the first flow groove jointly form the flow guide channel 181. Figure 10 As shown in the figure, the liquid receiving seat 123 is arranged at the top of the first mounting cylinder 12. The liquid receiving opening 1231 is vertically arranged on the liquid receiving seat 123. Figure 3 As shown in the figure, the liquid receiving opening 1231 is located directly below the flow guide channel 181, so as to facilitate the guiding of the treatment liquid into the space between the first telescopic blocking ring 15 and the second mounting cylinder 13.

[0033] More specifically, in order to improve the extrusion effect of the second mounting cylinder 13 and the extrusion cylinder 14 on the connecting part 23, as shown in the figure, Figure 4 As shown in the figure, the extrusion ring is coaxially and fixedly arranged at the bottom of the second mounting cylinder 13 and the top of the extrusion cylinder 14. The cross-sectional shape of the extrusion ring is arranged to be circular. When the connecting part 23 is extruded, the connecting part 23 and the two extrusion rings have a large contact area.

[0034] In use, first, the exhaust gas is inputted into the filter cylinder 1 through the air inlet 101, and then the exhaust gas is discharged from the air outlet 102 after sequentially passing through the first through hole 121, the outer annular part 21, the second through hole 131 and the inner annular part 22, so that the exhaust gas can be filtered by the outer annular part 21 and the inner annular part 22, and the exhaust gas can be filtered from coarse to fine, which is beneficial to improve the filtering effect and realize pollution-free emission; when the treatment liquid in the filtering part 2 is invalid, the outer annular part 21 and the inner annular part 22 are converted by the conversion mechanism 4, and the invalid treatment liquid is extruded from the filtering part 2 under the clamping of the second mounting cylinder 13 and the extrusion cylinder 14, and the new treatment liquid is first flowed out from the liquid storage tank 3, and then flowed to the filtering part 2 after sequentially passing through the liquid connecting hole 171, the flow guide channel 181 and the liquid connecting port 1231, so that on the one hand, the treatment liquid on the filtering part 2 can be replaced without stopping, and the influence of stopping on the cable combustion test efficiency is avoided, and on the other hand, the utilization rate of the filtering part 2 is improved, and the use cost is reduced.

[0035] In some embodiments, the conversion mechanism 4 is provided with a first elastic member and a moving assembly 42, the first elastic member is connected between the first mounting cylinder 12 and the outer annular part 21, and the outer annular part 21 has a tendency to move upward along the axis direction of the first mounting cylinder 12 under the action of the first elastic member; the moving assembly 42 is configured to provide a driving force for the inner annular part 22 to move upward and downward along the axis direction of the mounting cylinder.

[0036] Specifically, in the embodiment, the first elastic member is provided as a first tension spring 41, as shown in Figure 3 and Figure 4 When installed, the first tension spring 41 is provided in a vertical manner and is inserted between the first telescopic blocking ring 15 and the second mounting cylinder 13, the top end of the first tension spring 41 is fixedly connected to the inner top wall of the first mounting cylinder 12, and the bottom end is fixedly connected to the top of the outer annular part 21, and the outer annular part 21 has a tendency to move upward along the axis direction of the first mounting cylinder 12 under the action of the first tension spring 41.

[0037] During use, when the moving assembly 42 drives the inner annular part 22 to move upward, the outer annular part 21 is converted to the inner annular part 22, and the first tension spring 41 is elongated and stored; when the moving assembly 42 drives the inner annular part 22 to move downward, the inner annular part 22 is converted to the outer annular part 21 under the pulling of the first tension spring 41.

[0038] In a further embodiment, the moving assembly 42 is arranged to include a worm 421, a worm wheel 422 and a rack 423, the worm 421 and the worm wheel 422 are arranged on the first mounting cylinder 12 and are capable of rotating, the worm 421 and the worm wheel 422 are engaged, the rack 423 is partially inserted into the second mounting cylinder 13 and extends along the axial direction of the second mounting cylinder 13, one end of the rack 423 is fixedly connected to the inner annular portion 22, and the worm wheel 422 is coaxially and fixedly provided with a gear 424, the gear 424 and the rack 423 are engaged.

[0039] Specifically, as shown in Figure 3 and Figure 5 , the worm 421 is vertically arranged at the top of the first mounting cylinder 12, and the worm wheel 422 is horizontally arranged at the top of the first mounting cylinder 12; in order to facilitate the installation of the worm wheel 422, as shown in Figure 10 , a support seat 125 is arranged at the top of the first mounting cylinder 12, the support seat 125 is arranged in a “” shape and is arranged with the opening downward, and the worm wheel 422 is arranged to be rotatably sleeved on the support seat 125 during installation; the gear 424 is arranged to be rotatably sleeved on the support seat 125 during installation, and is fixedly connected with the worm wheel 422 to be capable of rotating synchronously with the worm wheel 422.

[0040] In use, the worm 421 is driven to rotate, the worm 421 drives the worm wheel 422 to rotate, the worm wheel 422 drives the gear 424 to rotate, and the gear 424 drives the inner annular portion 22 to move up and down through the rack 423.

[0041] In a further embodiment, the cable combustion experiment exhaust gas filtering device is arranged to further include a locking mechanism 5, the locking mechanism 5 is configured to lock the conversion ratio between the outer annular portion 21 and the inner annular portion 22 when the filtering portion 2 has the maximum filtering efficiency during the conversion of the outer annular portion 21 and the inner annular portion 22.

[0042] In use, during the conversion of the outer annular portion 21 and the inner annular portion 22, the locking mechanism 5 can lock the conversion ratio between the outer annular portion 21 and the inner annular portion 22 when the filtering portion 2 has the maximum filtering efficiency, so that the filtering portion 2 can always have the maximum filtering efficiency according to the content of impurity particles in the exhaust gas, thereby improving the test efficiency of the cable combustion experiment.

[0043] In a further embodiment, the first mounting cylinder 12 can slide along the axial direction of the separator tube 11; the locking mechanism 5 is configured to include a second elastic element, a ratchet 52, a ratchet block 53, and a friction ball 54. The second elastic element is connected between the filter tube 1 and the first mounting cylinder 12. Under the action of the second elastic element, the first mounting cylinder 12 has a tendency to move upward along the axial direction of the filter tube 1; the ratchet 52 is fixedly inserted into the inner peripheral wall of the separator tube 11 and extends in a direction parallel to the axial direction of the separator tube 11; the ratchet block 53 is disposed on the first mounting cylinder 12 and can slide elastically along the radial direction of the first mounting cylinder 12, and can form a one-way engagement with the ratchet 52, so that the first mounting cylinder 12 can only move downward along the axial direction of the filter tube 1; the friction ball 54 is movably inserted into the worm gear 421. When the worm gear 421 rotates, under the action of centrifugal force, the friction ball 54 can move to frictional contact with the ratchet block 53 and drive the ratchet block 53 to move towards or away from the ratchet 52.

[0044] Specifically, in this embodiment, the second elastic element is configured as a second tension spring 51, such as... Figure 7 As shown, the second tension spring 51 is vertically placed inside the separator tube 11, with its top end fixedly connected to the bottom of the guide section 18 and its bottom end fixedly connected to the first mounting cylinder 12. Under the action of the second tension spring 51, the first mounting cylinder 12 has a tendency to move upward along the axial direction of the filter cylinder 1; as Figure 8 As shown, the ratchet block 53 is configured as a "Z"-shaped block structure and is horizontally positioned at the top of the first mounting cylinder 12. To restrict the sliding direction of the ratchet block 53, a limiting seat 124 is fixedly provided at the top of the first mounting cylinder 12. During installation, the ratchet block 53 is configured to slide into the limiting seat 124. Under the restriction of the limiting seat 124, the ratchet block 53 can only slide along the radial direction of the first mounting cylinder 12 and can simultaneously move along the axial direction with the first mounting cylinder 12. Figure 5 As shown, an installation groove 4211 is obliquely opened on the bottom outer peripheral wall of the worm 421. The end of the installation groove 4211 closer to the axis of the worm 421 is set lower than the other end farther away from the axis of the worm 421. There are multiple installation grooves 4211, which are evenly arranged along the circumference. A friction ball 54 is inserted into each installation groove 4211.

[0045] Initially, under the pull of the second tension spring 51, the first mounting cylinder 12 has an upward tendency. At this time, under the unidirectional cooperation of the ratchet 52 and the ratchet block 53, the first mounting cylinder 12 is in a stationary state.

[0046] When the processing liquid in the filter part 2 is invalid, the worm 421 is driven to rotate, and the worm 421 drives the gear 424 to rotate through the worm wheel 422, and the gear 424 first drives the rack 423 to move downwards, at this time, the inner ring part 22 is converted to the outer ring part 21 under the pulling of the first tension spring 41, so that the inner ring part 22 is first extruded out of the invalid processing liquid, on the other hand, the friction ball 54 is driven to move to the end of the installation groove 4211 far away from the axis of the worm 421 by the centrifugal force, and is in frictional contact with the ratchet block 53, under the action of the frictional force when the worm 421 rotates, the friction ball 54 synchronously drives the ratchet block 53 to move towards the rack 52 under the action of the frictional force, so that the ratchet block 53 and the rack 52 are continuously engaged, at this time, the first installation cylinder 12 has a tendency to move upwards along the axis direction of the filter cylinder 1 under the pulling of the second tension spring 51; in the process of converting the inner ring part 22 to the outer ring part 21, as the area of the inner ring part 22 decreases, the exhaust gas is more difficult to pass through the inner ring part 22, so that the content of the exhaust gas outside the second installation cylinder 13 gradually increases, and the pressure increases.

[0047] When the inner ring part 22 disappears, the exhaust gas cannot be discharged through the gas outlet 102; then the rack 423 is driven to move upwards, and the outer ring part 21 is converted to the inner ring part 22 under the pulling of the rack 423, so that the invalid processing liquid in the outer ring part 21 is extruded out, and the first tension spring 41 is elongated and stored; in the process of converting the outer ring part 21 to the inner ring part 22, as the area of the outer ring part 21 decreases, the exhaust gas is more difficult to pass through the outer ring part 21, so that the content of the exhaust gas outside the first installation cylinder 12 further increases, and the pressure further increases, under the joint action of the pressure difference and the second tension spring 51, the first installation cylinder 12 can move upwards along the axis direction of the filter cylinder 1.

[0048] When the outer annular portion 21 disappears, the exhaust gas cannot be discharged through the outlet 102. The first mounting cylinder 12 moves upward to its limit position, at which point the failed treatment liquid in the filter section 2 is completely squeezed out. Then, the rack 423 moves downward, and under the pull of the first tension spring 41, the inner annular portion 22 is converted to the outer annular portion 21. During the conversion process, since the inner annular portion 22 and the outer annular portion 21 have already filtered the exhaust gas once, impurity particles and harmful components remain in both. These impurity particles and harmful components will hinder the passage of exhaust gas. Due to the uncertainty of the distribution of impurity particles and harmful components, the filtration efficiency of the filter section 2 is different when the inner annular portion 22 and the outer annular portion 21 are in different proportions. As the rack 423 moves, the filtration efficiency of the filter section 2 will change from 0 to 1. The pressure gradually increases, causing the exhaust gas content and pressure outside the second mounting cylinder 13 to gradually decrease, and the pushing force on the first mounting cylinder 12 due to the pressure difference to gradually decrease. When the overall weight of the first mounting cylinder 12 is greater than the resultant force of the second tension spring 51 and the pushing force due to the pressure difference, the first mounting cylinder 12 begins to move downward. When the filtration efficiency of the filter section 2 approaches its maximum, the exhaust gas content and pressure outside the second mounting cylinder 13 tend to increase, and the pushing force on the first mounting cylinder 12 due to the pressure difference tends to increase. When the filtration efficiency of the filter section 2 reaches its maximum, the first mounting cylinder 12 tends to move upward along the axial direction. At this time, under the unidirectional cooperation of the ratchet block 53 and the ratchet 52, the first mounting cylinder 12 cannot move upward, thus locking the conversion ratio between the outer annular portion 21 and the inner annular portion 22.

[0049] In a further embodiment, the locking mechanism 5 is configured to further include a third elastic element, which is connected between the ratchet block 53 and the first mounting cylinder 12. Under the action of the third elastic element, the ratchet block 53 has a tendency to move towards the ratchet bar 52.

[0050] Specifically, in this embodiment, the third elastic element is set as a third tension spring 55, such as... Figure 8 As shown, the third tension spring 55 is connected between the ratchet block 53 and the limiting seat 124. Under the action of the third tension spring 55, the ratchet block 53 tends to move towards the ratchet bar 52 so that the ratchet block 53 can lock with the ratchet bar 52, thereby allowing the first mounting cylinder 12 to be in a stationary state at the beginning.

[0051] In other embodiments, to improve the stability of the first mounting cylinder 12 during movement, two of each of the ratchet 52, ratchet block 53, limit seat 124, and third tension spring 55 are provided, such as... Figure 7 As shown, two ratchet bars 52 are symmetrically inserted into the inner circumferential wall of the partition tube 11; as Figure 8As shown, the two ratchet blocks 53, the limiting seat 124 and the third tension spring 55 are all centrally symmetrically arranged on the top of the first mounting cylinder 12, and the ratchet blocks 53 and the ratchet bars 52 are arranged one by one.

[0052] In other embodiments, the moving assembly 42 is arranged to further include a driving member configured to be capable of providing a driving force for the rotation of the worm 421.

[0053] In particular to the present embodiment, the driving member is arranged as a driving motor 425, as Figure 7 As shown, in order to facilitate the installation of the driving motor 425, a bracket 122 is fixedly arranged on the top of the first mounting cylinder 12, the driving motor 425 is arranged on the top of the bracket 122 when installed, the motor shaft of the driving motor 425 is arranged downward, and is coaxially fixedly connected to the top of the worm 421.

[0054] More specifically, the bottom end of the second tension spring 51 is arranged to be fixedly connected to the top of the bracket 122 when installed.

[0055] In use, the driving motor 425 is started, the driving motor 425 drives the worm 421 to rotate, the worm 421 drives the gear 424 to rotate through the worm gear 422, and the gear 424 drives the rack 423 to move up and down.

[0056] In other embodiments, in order to reduce the accumulation of the treatment liquid inside the extrusion cylinder 14, a communication hole is arranged on the extrusion cylinder 14, the communication hole communicates the extrusion cylinder 14 and the filter cylinder 1, and a one-way valve is inserted in the communication hole, the opening direction of the one-way valve is from the extrusion cylinder 14 to the filter cylinder 1.

[0057] In use, with the conversion between the outer annular portion 21 and the inner annular portion 22, the treatment liquid of the connecting portion 23 is gradually extruded by the second mounting cylinder 13 and the extrusion cylinder 14, part of the treatment liquid will fall into the extrusion cylinder 14; with the increase of the treatment liquid in the extrusion cylinder 14, the one-way valve can be opened, so that the treatment liquid in the extrusion cylinder 14 can enter the bottom of the filter cylinder 1 through the communication hole.

[0058] In other embodiments, in order to further improve the utilization rate of the filter part 2, the cable combustion experiment waste gas filtering device is arranged to further include a gas guiding part 6, under the action of the gas guiding part 6, the waste gas entering from the gas inlet 101 can move circumferentially.

[0059] In particular to the present embodiment, as Figure 9 As shown, the guiding part is arranged in an annular structure, and is fixedly inserted between the filter cylinder 1 and the partition pipe 11, a plurality of guide vanes are obliquely arranged on the outer peripheral wall of the guiding part, under the guiding action of the guide vanes, the waste gas entering from the gas inlet 101 can move circumferentially.

[0060] In use, the exhaust gas entering from the air inlet 101 under the guidance of the guide vane can move circumferentially, and then the exhaust gas can be filtered by the filter part 2 in a circumferentially uniform distribution manner, so that the filtering efficiency and utilization rate of the filter part 2 can be improved.

[0061] In further embodiments, in order to avoid the splash of the treatment liquid at the bottom of the filter cartridge 1 caused by the exhaust gas, the cable combustion experiment exhaust gas filtering device is further provided with a blocking part 7, which is inserted into the inside of the filter cartridge 1 and located below the first mounting cylinder 12, and the blocking part 7 is configured to block the splash of the treatment liquid at the bottom of the filter cartridge 1; a third through hole is formed in the blocking part 7.

[0062] Specifically, as shown in Figure 3 , the blocking part 7 is provided in a cylindrical structure with an open top and is coaxially inserted into the inside of the filter cartridge 1, the bottom of the blocking part 7 is provided in a circular truncated cone structure with a small end upward, and the number of the third through holes is multiple and uniformly arranged on the bottom end face of the blocking part 7.

[0063] In use, the treatment liquid flowing out from the communication hole or the first through hole 121 can first freely fall to the bottom of the blocking part 7, then move outward under the guidance of the conical surface, and finally fall to the bottom of the filter cartridge 1 through the third through hole.

[0064] In other embodiments, in order to facilitate the discharge of the treatment liquid at the bottom of the filter cartridge 1, as shown in Figure 3 , a plugging plug 19 is inserted through the bottom of the filter cartridge 1.

[0065] In use, the plugging plug 19 can be introduced into the inside of the filter cartridge 1, so that the treatment liquid can be discharged outside the filter cartridge 1 through the plugged position of the plugging plug 19; after the discharge is completed, the plugging plug 19 is re-plugged at the bottom of the filter cartridge 1.

[0066] In other embodiments, in order to improve the efficiency and uniformity of the filter part 2 in absorbing the treatment liquid, as shown in Figure 8 , the number of the liquid receiving seats 123 is three, and they are uniformly arranged circumferentially; correspondingly, the number of the guide structures is three, and they are uniformly arranged circumferentially, so as to form three guide channels 181.

[0067] In use, the new treatment liquid first flows out from the inside of the liquid storage tank 3, and then is evenly divided into three streams through the liquid receiving holes 171, and the three streams of treatment liquid flow through the filter part 2 at the same time through the three guide channels 181 and the three liquid receiving openings 1231 at an interval of 120 degrees.

[0068] In combination with the above embodiments, the use principle and working process of the embodiments of the present application are as follows: Initially, the first mounting cylinder 12 has a tendency to move upward under the pulling of the second tension spring 51, at this time, the first mounting cylinder 12 is in a static state under the one-way cooperation of the ratchet bar 52 and the ratchet block 53.

[0069] In use, first, the exhaust gas is input into the filter cylinder 1 through the air inlet 101, and the exhaust gas is sequentially discharged from the air outlet 102 after passing through the first through hole 121, the outer annular portion 21, the second through hole 131, and the inner annular portion 22, thereby realizing pollution-free emission.

[0070] After a preset processing time, when the processing liquid in the filter portion 2 is invalid, the driving motor 425 is started, the driving motor 425 drives the worm 421 to rotate, the worm 421 drives the gear 424 to rotate through the worm gear 422 on one hand, the gear 424 first drives the rack 423 to move downward, at this time, the inner annular portion 22 is converted to the outer annular portion 21 under the pulling of the first tension spring 41, so that the inner annular portion 22 is first extruded out of the invalid processing liquid, on the other hand, the friction ball 54 is moved to the end portion of the mounting groove 4211 away from the axis of the worm 421 by the centrifugal force, and is in frictional contact with the ratchet block 53, under the action of friction, the friction ball 54 synchronously drives the ratchet block 53 to move towards the ratchet bar 52 when the worm 421 rotates, so that the ratchet block 53 and the ratchet bar 52 are continuously connected, at this time, the first mounting cylinder 12 has a tendency to move upward along the axis direction of the filter cylinder 1 under the pulling of the second tension spring 51; in the process of conversion of the inner annular portion 22 to the outer annular portion 21, as the area of the inner annular portion 22 decreases, the exhaust gas is more difficult to pass through the inner annular portion 22, so that the content of the exhaust gas outside the second mounting cylinder 13 gradually increases, and the pressure increases.

[0071] When the inner annular portion 22 disappears, the exhaust gas cannot be discharged through the air outlet 102; then the rack 423 is driven to move upward, the outer annular portion 21 is converted to the inner annular portion 22 under the pulling of the rack 423, and then the invalid processing liquid in the outer annular portion 21 is extruded out, the first tension spring 41 is elongated and stored; in the process of conversion of the outer annular portion 21 to the inner annular portion 22, as the area of the outer annular portion 21 decreases, the exhaust gas is more difficult to pass through the outer annular portion 21, so that the content of the exhaust gas outside the first mounting cylinder 12 further increases, and the pressure further increases, under the joint action of the pressure difference and the second tension spring 51, the first mounting cylinder 12 can move upward along the axis direction of the filter cylinder 1.

[0072] When the outer annular part 21 disappears, the exhaust gas cannot be discharged through the gas outlet 102, the first mounting cylinder 12 moves upward to the limit position, at this time, the invalid treatment liquid in the filter part 2 is completely squeezed out; then the rack 423 is driven to move downward, the inner annular part 22 is converted to the outer annular part 21 under the pulling of the first tension spring 41; in the process of the conversion of the inner annular part 22 to the outer annular part 21, since the inner annular part 22 and the outer annular part 21 have filtered the exhaust gas once, impurity particles and harmful components are left in them, which hinder the passing of the exhaust gas, due to the uncertainty of the distribution of the impurity particles and harmful components, when the inner annular part 22 and the outer annular part 21 are in different proportions, the filtering efficiency of the filter part 2 is different; with the movement of the rack 423, the filtering efficiency of the filter part 2 gradually increases from 0, so that the content of the exhaust gas outside the second mounting cylinder 13 gradually decreases, the pressure gradually decreases, and the pushing force of the first mounting cylinder 12 generated by the pressure difference gradually decreases; when the gravity of the first mounting cylinder 12 is greater than the resultant force of the second tension spring 51 and the pushing force generated by the pressure difference, the first mounting cylinder 12 starts to move downward, when the filtering efficiency of the filter part 2 approaches the maximum, the content of the exhaust gas outside the second mounting cylinder 13 has a trend of increasing, the pressure has a trend of increasing, and the pushing force of the first mounting cylinder 12 generated by the pressure difference has a trend of increasing; when the filtering efficiency of the filter part 2 reaches the maximum, the first mounting cylinder 12 has a trend of moving upward along the axial direction, at this time, the first mounting cylinder 12 cannot move upward under the one-way cooperation of the ratchet block 53 and the ratchet bar 52, so that the conversion ratio between the outer annular part 21 and the inner annular part 22 is locked.

[0073] The new treatment liquid first flows out from the inside of the liquid storage tank 3, then flows to the filter part 2 through the liquid receiving hole 171, the flow guide channel 181 and the liquid receiving port 1231 in turn, so that the treatment liquid on the filter part 2 can be replaced without stopping.

[0074] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0075] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A cable burn experiment exhaust gas filtering device, characterized by, The cable combustion experiment waste gas filtering device comprises: A vertical filter cylinder, a partition pipe is inserted in the filter cylinder, an air inlet and an air outlet are arranged on the filter cylinder, the air inlet is communicated with the filter cylinder, the air outlet is communicated with the partition pipe, a first mounting cylinder is inserted in the partition pipe, a first through hole is arranged on the first mounting cylinder; a second mounting cylinder and an extrusion cylinder are coaxially and spaced arranged in the first mounting cylinder, a second through hole is arranged on the second mounting cylinder; a first telescopic stop ring is inserted between the first mounting cylinder and the second mounting cylinder, a second telescopic stop ring is inserted in the second mounting cylinder; A filter part is arranged as a double-layer annular elastic structure, and has an outer annular part and an inner annular part, a connecting part between the outer annular part and the inner annular part is clamped between the second mounting cylinder and the extrusion cylinder; the outer annular part is inserted between the first mounting cylinder and the second mounting cylinder, and is connected through the first telescopic stop ring and the first mounting cylinder; the inner annular part is inserted in the second mounting cylinder, and is connected through the second telescopic stop ring and the second mounting cylinder; A liquid storage tank is arranged on the filter cylinder, and a treatment liquid is stored in the liquid storage tank, the treatment liquid is configured to absorb impurity particles and harmful components in the waste gas; A conversion mechanism is configured to convert the outer annular part and the inner annular part to each other, so as to extrude the invalid treatment liquid from the filter part through the second mounting cylinder and the extrusion cylinder.

2. The cable burn experiment off-gas filter apparatus according to claim 1, characterized by, The conversion mechanism comprises a first elastic member and a moving assembly, the first elastic member is connected between the first mounting cylinder and the outer annular part, and the outer annular part has a tendency to move upward along the axis direction of the first mounting cylinder under the action of the first elastic member; The moving assembly is configured to provide a driving force for the inner annular part to move upward and downward along the axis direction of the mounting cylinder.

3. The cable burn experiment off-gas filter apparatus according to claim 2, wherein, The moving assembly comprises a worm, a worm wheel and a rack, the worm and the worm wheel are arranged on the first mounting cylinder and can rotate, and the worm and the worm wheel are engaged; the rack is partially inserted in the second mounting cylinder and extends along the axis direction of the second mounting cylinder, one end of the rack is fixedly connected to the inner annular part; a gear is coaxially and fixedly arranged on the worm wheel, and the gear and the rack are engaged.

4. The cable burn experiment off-gas filter apparatus according to claim 3, wherein The cable combustion experiment waste gas filtering device further comprises a locking mechanism, the locking mechanism is configured to lock the conversion ratio between the outer annular part and the inner annular part when the filter part has the maximum filtering efficiency during the conversion of the outer annular part and the inner annular part.

5. The cable burn experiment off-gas filter apparatus according to claim 4, wherein The first mounting cylinder can slide along the axial direction of the separation pipe; the locking mechanism comprises a second elastic member, a ratchet, a ratchet block and a friction ball, the second elastic member is connected between the filter cylinder and the first mounting cylinder, and the first mounting cylinder has a tendency to move upward along the axial direction of the filter cylinder under the action of the second elastic member; the ratchet is fixedly inserted into the inner circumferential wall of the separation pipe and extends along the axial direction parallel to the separation pipe; the ratchet block is arranged on the first mounting cylinder and can elastically slide along the radial direction of the first mounting cylinder and can form one-way cooperation with the ratchet, so that the first mounting cylinder can only move downward along the axial direction of the filter cylinder; the friction ball is movably inserted into the worm, and when the worm rotates, the friction ball can move to frictionally contact with the ratchet block under the action of centrifugal force and drive the ratchet block to move towards or away from the ratchet.

6. The cable burn experiment off-gas filter apparatus according to claim 5, wherein The locking mechanism further comprises a third elastic member, the third elastic member is connected between the ratchet block and the first mounting cylinder, and the ratchet block has a tendency to move towards the ratchet under the action of the third elastic member.

7. The cable burn experiment off-gas filter apparatus according to claim 3, wherein The moving assembly further comprises a driving member configured to provide driving force for self-rotation of the worm.

8. The cable burn experiment exhaust filter apparatus of claim 1, wherein, The extrusion cylinder is provided with a communication hole, the communication hole communicates the extrusion cylinder and the filter cylinder, and a one-way valve is inserted into the communication hole, and the opening direction of the one-way valve is from the extrusion cylinder to the filter cylinder.

9. The cable burn experiment exhaust filter apparatus of claim 1, wherein, The cable combustion experiment waste gas filtering device further comprises a gas guiding portion, and under the action of the gas guiding portion, the waste gas entering from the gas inlet can move in the circumferential direction.

10. The cable burn experiment exhaust gas filtration device of claim 9, wherein, The cable combustion experiment waste gas filtering device further comprises a blocking portion, the blocking portion is inserted into the inside of the filter cylinder and is located below the first mounting cylinder, and the blocking portion is configured to block the splashing of the treatment liquid at the bottom of the filter cylinder; a third through hole is formed in the blocking portion.

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