Pneumatic rotating arm exhaust fume collecting hood

Abstract

The invention discloses a pneumatic rotating arm exhaust fume collecting hood, and belongs to the technical field of exhaust fume collecting hoods. Comprising a stand column, a cantilever unit, a first pneumatic swing assembly and a smoke collecting unit, and the cantilever unit comprises a rotating seat which is fixed to the top of the stand column and is of a C-shaped structure; bearing bodies are oppositely fixed on the upper and lower sides of the rotating seat; a cantilever body is rotationally arranged between the bearing bodies through a rotating shaft; a pipeline support is fixed to the top of the outer side of the rotating base. A limiting block attached to the cantilever body is fixed to the side of the rotating base. The first pneumatic swing assembly is fixed outside the rotating seat, and the swing end of the first pneumatic swing assembly is hinged to the cantilever body; the first pneumatic swing assembly is connected with a control switch through a controller, and the control switch is fixed to the stand column. According to the exhaust fume collecting hood with the pneumatic rotating arm, the hood body can hover or rotate through the air pressure difference, and meanwhile, comprehensive collection or fixed-point collection of local low-position side exhaust fume can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of pneumatic rotary arm fume hoods, belong to fume hood technical field. BACKGROUND

[0002] In industrial smoke dust treatment system, fume hood is the key source collection equipment that determines treatment efficiency and energy consumption;Its main function is to capture and import purification system near the generation point before pollutant diffusion;Such as Chinese patent authorized announcement No. CN223571608U, the disclosed dust removal fume hood includes fume hood body and translation adjustment mechanism, the bottom of fume hood body is provided with smoke port, the top of fume hood body is provided with connecting pipe connected with smoke port, the structure provides medium for user to translate adjustment of fume hood body smoke collection range according to actual smoke collection demand, avoids the situation that fume hood body is difficult to adjust smoke collection range during use;In addition, the existing fume hood is applied to fixed station of fine operation, generally adopts pure manual universal arm, relies on friction between joints to position, there are inherent defects such as tedious operation, arm pipe loosening and sagging (i.e. "nodding" phenomenon) caused by friction wear after long-term use, which affects collection efficiency and stability;When smoke is just generated or in the later stage of collection, the smoke is at the lowest position, and the suction force of the cover body for the low-position smoke is limited due to the large area of the cover body for suctioning smoke, which cannot guarantee the complete collection of smoke, and the cover body suctions air in a large area of the surrounding smoke-free area, causing suction force waste;In addition, the existing cover body cannot realize fixed-point smoke collection for a process in the station. SUMMARY

[0003] To solve the above problems, the present application provides a kind of pneumatic rotary arm fume hoods, cover body can realize hovering or rotation by air pressure difference, and can realize local low-position side smoke collection or fixed-point collection.

[0004] The pneumatic rotary arm fume hood of the present application comprises: a stand column; a cantilever unit, the cantilever unit comprises a rotating seat fixed to the top of the stand column and having a C-shaped structure;The rotating seat is oppositely fixed with bearing bodies on the upper and lower sides;The bearing bodies are rotatably provided with a cantilever body through a rotating shaft;A pipeline support is fixed to the top of the outer side of the rotating seat;Limiting blocks are fixed to the side of the rotating seat and abut the cantilever body; a first pneumatic swing assembly, the first pneumatic swing assembly is fixed to the outside of the rotating seat, and the swing end of the first pneumatic swing assembly is hingedly connected with the cantilever body;The first pneumatic swing assembly is connected with a control switch through a controller, and the control switch is fixed to the stand column; a smoke collection unit, the smoke collection unit comprises a square cover body, a smoke collection pipe is fixed to the center of the cover body, and the smoke collection pipe is connected to a filter bag dust collector through a hose.

[0005] In operation, the controller receives a clockwise or counterclockwise rotation signal sent by the control switch, and sends a signal to the corresponding electromagnetic valve of the first pneumatic swing assembly to make the first pneumatic swing assembly swing clockwise or counterclockwise. The first pneumatic swing assembly synchronously drives the cantilever body to swing along the rotating seat, and the swing range of the cantilever body is limited by the limiting block. When the cantilever body swings, the cover body synchronously swings, and the cantilever body is locked by the first pneumatic swing assembly when the cantilever body is right above the flue gas source. Then, the smoke collection process is performed, and the filter bag dust collector provides suction to the smoke collection pipe and the cover body through the hose.

[0006] Further, the cover body is fixed at the front end with a flue gas sensing unit connected to the controller. The controller controls the reciprocating rotation of the first pneumatic swing assembly, and the flue gas sensing unit can actively capture the surrounding flue gas intensity. When the flue gas intensity reaches the highest point, the cover body is locked, and the smoke collection is performed by the cover body. The flue gas sensing unit can use laser and infrared detection methods, such as a laser gas remote sensor or an infrared flue gas detector, or detect the temperature of the processing area of the work station to indirectly determine the flue gas generation position.

[0007] Further, the inside top of the cover body is fixed with a smoke guide cover through a flange, and the bottom of the smoke collection pipe is embedded and fixed with the bottom of the smoke guide cover. The cover body is rotatably provided with a smoke guide plate on both sides. Two outer fixed plates are fixed below the smoke guide cover at the inside bottom of the cover body, and two groups of louver plates are rotatably provided outside the outer fixed plates at the inside bottom of the cover body. The louver plates are connected by an opening and closing drive. A plurality of inner fixed plates are fixed between the two outer fixed plates. The smoke guide plate is movably attached to the outer fixed plate. Two groups of second pneumatic swing assemblies are fixed on both sides of the smoke collection pipe at the outside top of the cover body, and the swing ends of the two second pneumatic swing assemblies are hingedly installed outside the smoke guide plate.

[0008] The smoke guide cover can linearly concentrate or expand the collection surface of the suction, specifically as follows: When expanding the collection surface, the cover body can collect flue gas comprehensively, and the swing end of the second pneumatic swing assembly drives the smoke guide plate to approach the inside top of the cover body. At this time, the flue gas can enter the smoke guide cover through the gaps between the louver plates, the gaps between the louver plates and the outer fixed plates, the gaps between the outer fixed plates and the inner fixed plates, and the gaps between the inner fixed plates, and then be sent to the smoke collection pipe through the smoke guide cover. When linearly collecting flue gas, the opening and closing drive drives the louver to swing, so that the adjacent louvers are attached to each other. At this time, the louver closes the space outside the outer fixed plate. Then, the second pneumatic swing assembly is actuated, and the second pneumatic swing assembly drives the smoke guide plate to rotate and swing along the cover body. At this time, the smoke guide plate is pressed against the outside of the outer fixed plate, thereby forming an internal independent smoke collection channel in the cover body through the smoke guide cover, the smoke guide plate and the outer fixed plate. The filter bag dust collector maintains a constant suction force, which can ensure that the smoke collection channel has sufficient suction force for low-position flue gas.

[0009] Further, the first pneumatic swing assembly and the second pneumatic swing assembly comprise an outer cylinder seat; the outer cylinder seat is provided with a swing sliding groove; a gas cylinder is fixed to the inner side of the outer cylinder seat, and the pipeline of the gas cylinder is hung on the pipeline support; the front end of the outer cylinder seat is hingedly connected to the middle part of a Y-shaped rocker; one end of the rocker is hingedly connected to the piston rod of the gas cylinder, and the other end of the rocker is hingedly connected to one end of a connecting plate, and the other end of the connecting plate is hingedly connected to a cantilever body or a smoke guide plate.

[0010] When the first pneumatic swing assembly and the second pneumatic swing assembly are working, the outer cylinder seat is externally closed, and the outer cylinder seat has a swing space for the rocker and the connecting plate. Meanwhile, the connecting plate can protrude out of the outer cylinder seat through the swing sliding groove. The top of the cover body is provided with a sliding channel opposite to the swing sliding groove. When working, the gas cylinder is actuated, the gas cylinder drives one end of the rocker to actuate, the middle part of the rocker swings on the outer cylinder seat, and the other end of the rocker drives the connecting plate to swing, so that the connecting plate can be driven to rotate and swing by the gas cylinder, and the cantilever body or the smoke guide plate can be rotated and swung.

[0011] Further, the opening and closing drive comprises a transmission assembly and a driving assembly. The transmission assembly comprises a connecting block fixed to the top side of the louver, and a first linkage plate is hingedly connected between adjacent connecting blocks. One of the two sets of louvers is fixed with a first linkage seat, and the outer part of the smoke guide plate is fixed with a second linkage seat. The driving assembly is a second linkage plate hingedly connected between the first linkage seat and the second linkage seat.

[0012] When high linearity smoke collection is required, the second pneumatic swing assembly drives the smoke guide plate to attach to the outer fixed plate, so that the cover body center position, the spring pipe and the suction nozzle form a smoke collection pipeline. When the smoke guide plate swings, the second linkage seat, the second linkage plate and the second linkage seat drive a certain louver to swing. When a certain louver swings, the connecting block and the first linkage plate are linked to realize the synchronous swinging of other louvers, and the mutual attachment between the louvers is realized. When the smoke guide plate is reset, the smoke guide plate is separated from the outer fixed plate, and at the same time, the second linkage plate and the linkage plate synchronously drive each louver to swing synchronously, so that the louvers are perpendicular to the ground.

[0013] Further, the transmission assembly includes a chain wheel arranged outside the cover body and fixed with the rotating end of the smoke guide plate, and a chain is sleeved outside the chain wheel; the driving assembly is an opening and closing motor fixed with one chain wheel; the opening and closing motor can drive one chain wheel to rotate, and through cooperation of the chain wheel and the chain, the louver plates can be mutually adhered to each other, the bottom of the cover body is closed, the louver plates can be driven to be perpendicular to the ground, the cover body can smoothly collect flue gas, in addition, the opening and closing motor can adjust the inclination angle of the louver plates, and the collection angle of flue gas can be adjusted.

[0014] Further, two groups of guide plates are hingedly connected to the inner bottom of the smoke guide cover, and the two groups of guide plates are sleeved with an 8-shaped transmission belt outside the smoke guide cover; the rotating end of one guide plate is fixed with a guide motor; the guide motor can drive one guide plate to rotate and swing, synchronous action of the two guide plates is driven through the transmission belt, the guide plates are perpendicular to the ground, mutually close to or away from each other; the guide plates can adjust the suction direction of the smoke guide cover, when point collection and area collection are simultaneously performed, the center of the cover body has suction, the suction is dispersed to other positions of the cover body through adjustment of the guide plates, when point collection is performed, the area collection of the cover body has suction.

[0015] Further, a clamping groove is formed in one side of the lower part of the outer fixed plate; a clamping opening is formed in the front end of the cover body; clamping rails are arranged on both sides of the clamping opening, and elastic clamping plates are movably clamped on the clamping rails; a point smoke suction assembly is clamped at the clamping opening, and the point smoke suction assembly includes a spring pipe, and a suction nozzle is fixed to the bottom of the spring pipe; a frame seat is fixed to the top of the spring pipe, and clamping edges are integrally formed on both sides of the top of the frame seat; the clamping edges are movably clamped with the clamping groove.

[0016] In use, point collection with high suction, local area collection and point collection can be realized according to requirements, and specific implementation is as follows: When point collection is performed, the smoke guide plate is first movably adhered with the outer fixed plate, the smoke guide plate and the outer fixed plate form a guide interval, then the clamping edges of the frame seat are embedded into the clamping groove, and the elastic clamping plates are clamped; at this time, the guide interval, the frame seat, the spring pipe and the suction nozzle form a smoke collection pipeline; the suction nozzle is adjusted to be 30°-60° to a certain flue gas generation point of the work station through swing, at this time, the filter bag dust collector provides a smoke collection suction, and the smoke collection area is greatly reduced relative to the cover body due to the smoke collection pipeline, and the suction of point collection is ensured.

[0017] When the local interval smoke collection and the fixed point smoke collection are performed, the smoke guide plate is separated from the outer fixed plate, so that the whole cover has the smoke collection capability, at this time, the cover center position, the spring pipe and the suction nozzle form a smoke collection pipeline; the spring pipe is adjusted by swinging, so that the suction nozzle is opposite to a certain smoke generation point of the work station, the suction force of the fixed point smoke collection is realized by providing the smoke collection suction force by the filter bag dust collector, meanwhile, other positions of the cover also have the smoke collection capability, when the smoke dust which is not completely collected at the fixed point or the smoke dust generated at other points can be absorbed by the high position cover, so that the fixed point smoke collection and the local space smoke collection are realized.

[0018] Further, the cantilever body is a Y-shaped structure, the cantilever body can be hung and supported on the cover, and can be cooperated with the rotating seat to realize hovering or rotation.

[0019] Compared with the prior art, the pneumatic rotating arm smoke cover of the present application can realize the accurate movement of the cover to the dust collection area by the first pneumatic swing assembly depending on the air pressure difference, so that the efficient smoke collection of the work station interval can be realized; when the smoke is at a low position, the independent smoke collection interval is formed by the smoke guide cover and the smoke guide plate, and the remaining smoke collection surface of the cover is blocked by the two groups of louver plates, so that the smoke collection area of the cover on the horizontal plane can be greatly reduced, the suction force provided by the filter bag dust collector is fully applied to the independent smoke collection interval, the linearity of the suction force is improved, the comprehensive collection of the smoke at the low position can be realized, and the spring pipe and the suction nozzle can be arranged at the independent smoke collection interval according to the process requirement, the point-to-point smoke collection of a certain process can be realized by the extension and contraction and the universal memory of the spring pipe; in addition, the independent smoke collection interval can be removed, the spring pipe and the cover can be installed, and the fixed point smoke collection and the work station space smoke collection can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the pneumatic rotating arm smoke cover embodiment 1 of the present application.

[0021] Figure 2 It is the whole structure schematic diagram of the pneumatic rotating arm smoke cover embodiment 2 of the present application.

[0022] Figure 3 It is the arrangement structure schematic diagram of each component inside the cover of the present application.

[0023] Figure 4 It is the installation structure schematic diagram of the cover and each component inside the cover in the embodiment 3 of the present application.

[0024] Figure 5 It is the installation structure schematic diagram of the cover and each component inside the cover in the embodiment 4 of the present application.

[0025] Figure 6 It is the whole structure schematic diagram of the cover in the embodiment 4 of the present application.

[0026] Figure 7 This is a schematic diagram of the connection structure between the smoke hood and the guide plate in Embodiment 5 of the present invention.

[0027] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0028] Figure 9 This is a schematic diagram of the installation structure of the cover and its internal components in Embodiment 6 of the present invention.

[0029] Figure 10 This is a schematic diagram of the mounting structure of the frame, retaining edge, spring tube, and suction nozzle of the present invention.

[0030] Figure 11 This is a schematic diagram of the overall structure of the cover in Embodiment 6 of the present invention.

[0031] Figure 12 For the present invention Figure 11 A magnified schematic diagram of the structure at point B in the middle.

[0032] Reference numerals: 1. Column, 2. Rotating seat, 3. Cantilever body, 4. Pipe support, 5. Limiting block, 6. Control switch, 7. Cover, 8. Smoke collection pipe, 9. Smoke sensing unit, 10. Smoke guide hood, 11. Smoke guide plate, 12. Outer fixing plate, 13. Louvered plate, 14. Inner fixing plate, 15. Second pneumatic swing assembly, 16. Cylinder, 17. Rocker arm, 18. Connecting plate, 19. Connecting block, 20. First linkage plate, 21. First linkage seat, 22. Second linkage seat, 23. Outer cylinder seat, 24. Chain, 25. Guide plate, 26. Transmission belt, 27. Slot, 28. Rail, 29. Elastic plate, 30. Nozzle, 31. Frame seat, 32. Edge, 33. Spring tube. Detailed Implementation

[0033] Example 1: like Figure 1 The pneumatic rotating arm smoke hood shown includes: Column 1; The cantilever unit includes a C-shaped rotating seat 2 fixed to the top of the column 1; bearing bodies are fixed to the upper and lower sides of the rotating seat 2; a cantilever body 3 is rotatably arranged between the bearing bodies via a rotating shaft; a pipe support 4 is fixed to the top outer side of the rotating seat 2; and a limiting block 5 that fits against the cantilever body 3 is fixed to the side of the rotating seat 2. The first pneumatic swing assembly is fixed to the outside of the rotating base 2, and the swing end of the first pneumatic swing assembly is hinged to the cantilever body 3; the first pneumatic swing assembly is connected to the control switch 6 through the controller, and the control switch 6 is fixed on the column 1; The smoke collection unit includes a square hood 7, with a smoke collection pipe 8 fixed at the center of the hood 7. The smoke collection pipe 8 is connected to the filter bag dust collector via a flexible hose.

[0034] During operation, a clockwise or counterclockwise rotation signal is sent through the control switch 6. After receiving the signal, the controller sends a signal to the solenoid valve corresponding to the first pneumatic swing component, so that the first pneumatic swing component swings clockwise or counterclockwise. The first pneumatic swing component synchronously drives the cantilever body 3 to rotate and swing along the rotating seat 2, and the swing range of the cantilever body 3 can be limited by the limit block 5. When the swing arm swings, the drive hood 7 swings synchronously. After swinging directly above the flue gas source, the first pneumatic swing component locks the position of the swing arm. Then the smoke collection process is carried out. The filter bag dust collector provides suction to the smoke collection pipe 8 and the hood 7 through the hose.

[0035] Example 2: like Figure 2 The pneumatic rotating arm fume hood shown has a fume sensing unit 9 fixed at the front end of the hood body 7, which is connected to a controller. The controller controls the reciprocating rotation of the first pneumatic swing assembly and actively captures the intensity of the surrounding fume through the fume sensing unit 9. When the fume intensity reaches its highest point, the position of the hood body 7 is locked, and fume collection is performed through the hood body 7. The fume sensing unit 9 can detect fumes using laser and infrared methods, such as using a laser gas telemetry instrument or an infrared fume detector, or by detecting the temperature of the processing area of ​​the workstation, and indirectly determine the location of fume generation by capturing the temperature.

[0036] Example 3: like Figure 3 and Figure 4 The pneumatic rotating arm smoke hood shown has a smoke guide hood 10 fixed to the top inner side of the hood body 7 via a flange, and the bottom of the smoke collection pipe 8 is fitted and fixed to the bottom of the smoke guide hood 10; smoke guide plates 11 are rotatably arranged on both sides of the hood body 7; two outer fixing plates 12 are fixed to the bottom inner side of the hood body 7 directly below the smoke guide hood 10, and two sets of louvers 13 are rotatably arranged to the bottom inner side of the hood body 7 outside the outer fixing plates 12; the louvers 13 are connected by an opening and closing driver; multiple inner fixing plates 14 are fixed between the two outer fixing plates 12; the smoke guide plates 11 are movably fitted with the outer fixing plates 12; two sets of second pneumatic swing assemblies 15 are fixed to the top outer side of the hood body 7 on both sides of the smoke collection pipe 8, and the swing ends of the two second pneumatic swing assemblies 15 are hinged to the outside of the smoke guide plates 11.

[0037] The smoke guide hood 10 can linearly concentrate the suction or expand the collection surface, as detailed below: When the collecting area is expanded, the cover 7 can collect flue gas comprehensively, the swing end of the second pneumatic swing assembly 15 drives the smoke guide plate 11 to approach the top inside of the cover 7; at this time, the flue gas can enter the smoke guide cover 10 from the gaps between the louvers 13, the gaps between the louvers 13 and the outer fixed plate 12, the gaps between the outer fixed plate 12 and the inner fixed plate 14, the gaps between the inner fixed plates 14, and be sent into the smoke collecting pipe 8 through the smoke guide cover 10; When the flue gas is collected linearly, the opening and closing drive drives the louvers 13 to swing, so that the adjacent louvers 13 are attached to each other; at this time, the louvers 13 close the space outside the outer fixed plate 12, then the second pneumatic swing assembly 15 acts, the second pneumatic swing assembly 15 drives the smoke guide plate 11 to rotate and swing along the cover 7; at this time, the smoke guide plate 11 and the outside of the outer fixed plate 12 are attached to each other, thereby forming an internal independent smoke collecting channel in the cover 7 through the smoke guide cover 10, the smoke guide plate 11 and the outer fixed plate 12, and the filter bag dust collector can ensure that the smoke collecting channel has sufficient suction for low-position flue gas in the state of keeping the suction unchanged.

[0038] The first pneumatic swing assembly and the second pneumatic swing assembly 15 include an outer cylinder seat 23; the outer cylinder seat 23 is provided with a swing sliding groove; a cylinder 16 is fixed inside the outer cylinder seat 23, and a pipeline of the cylinder 16 is hung on the pipeline support 4; a front end of the outer cylinder seat 23 is hinged to a middle part of a Y-shaped rocker 17; one end of the rocker 17 is hinged to a piston rod of the cylinder 16, and the other end of the rocker 17 is hinged to one end of a connecting plate 18, and the other end of the connecting plate 18 is hinged to the cantilever body 3 or the smoke guide plate 11.

[0039] When the first pneumatic swing assembly and the second pneumatic swing assembly 15 work, the outer cylinder seat 23 is externally closed, the outer cylinder seat 23 has a swing space of the rocker 17 and the connecting plate 18 inside, and the connecting plate 18 can protrude out of the outer cylinder seat 23 through the swing sliding groove, wherein a sliding groove is provided on the top of the cover 7 opposite to the swing sliding groove; when working, the cylinder 16 acts, the cylinder 16 drives one end of the rocker 17 to act, the middle part of the rocker 17 swings on the outer cylinder seat 23, and the other end of the rocker 17 drives the connecting plate 18 to swing, so that the connecting plate 18 can be driven to rotate and swing by the cylinder 16, and the rotation and swing of the cantilever body 3 or the smoke guide plate 11 are realized.

[0040] The opening and closing drive includes a transmission assembly and a driving assembly, the transmission assembly includes a connecting block 19 fixed to the top side of the louver 13, and a first linkage plate 20 is hinged between adjacent connecting blocks 19; one of the two groups of louvers 13 is fixed with a first linkage seat 21, and a second linkage seat 22 is fixed outside the smoke guide plate 11, and the driving assembly is a second linkage plate hinged between the first linkage seat 21 and the second linkage seat 22.

[0041] When high linearity smoke collection is needed, the second pneumatic swing assembly 15 drives the smoke guide plate 11 to adhere to the outer fixed plate 12, so that the center position of the cover 7, the spring pipe and the suction nozzle form a smoke collection pipeline; when the smoke guide plate 11 swings, a certain louver 13 is driven to swing through the second linkage seat 22, the second linkage plate and the second linkage seat 22, when a certain louver 13 swings, the other louvers 13 are linked and swung synchronously through the connecting block 19 and the first linkage plate 20, realizing the mutual adhesion between the louvers 13; when the smoke guide plate 11 is reset, the smoke guide plate 11 is separated from the outer fixed plate 12, and at the same time, the louvers 13 are synchronously swung through the second linkage plate and a linkage plate, so that the louvers 13 are perpendicular to the ground.

[0042] Example 4: As shown in Figure 5 and Figure 6 The pneumatic rotating arm smoke collection cover, the transmission assembly includes a chain wheel arranged outside the cover 7 and fixed with the rotating end of the smoke guide plate 11, and the chain wheel is sleeved with a chain 24 outside; the driving assembly is an on-off motor fixed with a chain wheel; the on-off motor can drive a chain wheel to rotate, and through the cooperation of the chain wheel and the chain 24, the louvers 13 can be mutually adhered, realizing the closure of the bottom of the cover 7, and the louvers 13 can also be driven to be perpendicular to the ground, ensuring that the cover 7 can smoothly collect smoke, in addition, the inclination angle of the louver 13 can also be adjusted through the on-off motor, and the collection angle of smoke can be adjusted.

[0043] Example 5: As shown in Figures 7 to 8 The pneumatic rotating arm smoke collection cover, the transmission assembly includes a chain wheel arranged outside the cover 7 and fixed with the rotating end of the smoke guide plate 11, and the chain wheel is sleeved with a chain 24 outside; the driving assembly is an on-off motor fixed with a chain wheel; the on-off motor can drive a chain wheel to rotate, and through the cooperation of the chain wheel and the chain 24, the louvers 13 can be mutually adhered, realizing the closure of the bottom of the cover 7, and the louvers 13 can also be driven to be perpendicular to the ground, ensuring that the cover 7 can smoothly collect smoke, in addition, the inclination angle of the louver 13 can also be adjusted through the on-off motor, and the collection angle of smoke can be adjusted.

[0044] Example 6: As shown in Figures 9 to 12The shown gas rotary arm smoke collecting cover, the lower part of the outer fixed plate 12 is provided with a clamping groove 27 on one side close to each other; the front end of the cover body 7 is provided with a clamping hole; the clamping hole is provided with clamping rails 28 on both sides, and the clamping rails 28 are movably clamped with elastic clamping plates 29; the clamping hole is clamped with a fixed point smoke suction assembly, the fixed point smoke suction assembly comprises a spring pipe 33, and the bottom of the spring pipe 33 is fixed with a suction nozzle 30; the top of the spring pipe 33 is fixed with a frame seat 31, and the frame seat 31 is integrally formed with clamping edges 32 on both sides of the top; the clamping edges 32 are movably clamped with the clamping groove 27.

[0045] In use, the high suction fixed point smoke collecting and the local interval and fixed point smoke collecting of the work station can be realized according to the requirements, and the specific implementation is as follows: When the fixed point smoke collecting is performed, the smoke guide plate 11 is movably attached with the outer fixed plate 12, so that the smoke guide plate 11 and the outer fixed plate 12 form a guide interval, then the clamping edges 32 of the frame seat 31 are embedded into the clamping groove 27, and clamped by the elastic clamping plates 29; at this time, the guide interval, the frame seat 31, the spring pipe 33 and the suction nozzle 30 form a smoke collecting pipeline; the spring pipe 33 is adjusted by swinging, so that the suction nozzle 30 is at an angle of 30°-60° and faces a certain smoke generating point of the work station, at this time, the filter bag dust collector provides a smoke collecting suction force, and since the smoke collecting pipeline is greatly reduced relative to the cover body 7, the suction force of the fixed point smoke collecting is ensured.

[0046] When the local interval and fixed point smoke collecting of the work station is performed, the smoke guide plate 11 is separated from the outer fixed plate 12, so that the whole cover body 7 has a smoke collecting capability, at this time, the center position of the cover body 7, the spring pipe 33 and the suction nozzle 30 form a smoke collecting pipeline; the spring pipe 33 is adjusted by swinging, so that the suction nozzle 30 faces a certain smoke generating point of the work station, and the filter bag dust collector provides a smoke collecting suction force, so that the suction force of the fixed point smoke collecting is realized, at the same time, other positions of the cover body 7 also have a smoke collecting capability, when the dust not completely collected at the fixed point position or the smoke dust generated at other points can be absorbed by the high position cover body 7; so that the fixed point smoke collecting and the local space smoke collecting are realized.

[0047] The cantilever body 3 is a Y-shaped structure, and can hang and support the cover body 7, and can cooperate with the rotary seat 2 to realize hovering or rotation.

[0048] The above embodiments are only preferred embodiments of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the present application are included in the present application.

Claims

1. A gas powered rotary arm hood, characterized by: Include: The column; Cantilever unit, cantilever unit includes fixed on the top of the column, and the rotating seat of C-shaped structure; The upper and lower sides of the rotating seat are opposite and fixed with bearing body; The cantilever body is rotatably arranged between the bearing bodies through the rotating shaft; The outer top of the rotating seat is fixed with a pipeline support; The side of the rotating seat is fixed with a limiting block abutting with the cantilever body; The first pneumatic swing assembly is fixed outside the rotating seat, and the swing end of the first pneumatic swing assembly is hingedly installed with the cantilever body; The first pneumatic swing assembly is connected with the control switch through the controller, and the control switch is fixed on the column; The smoke collecting unit includes a square cover body, a smoke collecting pipe is fixed at the center of the cover body, and the smoke collecting pipe is connected to the filter bag dust collector through a hose.

2. The air-driven rotary-arm fume hood of claim 1, wherein: The front end of the cover body is fixed with a smoke gas sensing unit, and the smoke gas sensing unit is connected to the controller.

3. The air-driven rotary-arm fume hood of claim 1, wherein: The inner side of the cover body is fixed with a smoke guide cover through a flange, and the bottom of the smoke guide cover is embedded and fixed with the bottom of the smoke guide cover; The smoke guide plate is rotatably arranged on both sides of the cover body; Two outer fixed plates are fixed below the smoke guide cover on the inner bottom of the cover body, and two groups of louver plates are rotatably arranged on the outer side of the outer fixed plate; The louver plate is connected through the opening and closing drive; A plurality of inner fixed plates are fixed between the two outer fixed plates; The smoke guide plate and the outer fixed plate are movably attached; Two groups of second pneumatic swing assemblies are fixed on both sides of the smoke collecting pipe on the outer top of the cover body, and the swing ends of the two second pneumatic swing assemblies are hingedly installed with the outer part of the smoke guide plate.

4. The air-driven rotary-arm fume hood of claim 3, wherein: The first pneumatic swing assembly and the second pneumatic swing assembly include an outer cylinder seat; The outer cylinder seat is provided with a swing sliding groove; The inner side of the outer cylinder seat is fixed with a gas cylinder, and the pipeline of the gas cylinder is hung on the pipeline support; The front end of the outer cylinder seat is hingedly connected with the middle part of the Y-shaped rocker; One end of the rocker is hingedly connected with the piston rod of the gas cylinder, and the other end of the rocker is hingedly connected to one end of the connecting plate, and the other end of the connecting plate is hingedly connected with the cantilever body or the smoke guide plate.

5. The air-driven rotary-arm fume hood of claim 3, wherein: The opening and closing drive includes a transmission assembly and a driving assembly, the transmission assembly includes a connecting block fixed on the top side of the louver plate, and a first linkage plate is hingedly connected between adjacent connecting blocks; One of the two groups of louver plates is fixed with a first linkage seat, and a second linkage seat is fixed on the outer part of the smoke guide plate, and the driving assembly is a second linkage plate hingedly connected between the first linkage seat and the second linkage seat.

6. The air-driven rotary-arm fume hood of claim 4, wherein: The transmission assembly includes a sprocket fixed on the rotating end of the smoke guide plate outside the cover body, and the sprocket is sleeved with a chain outside; The driving assembly is an opening and closing motor fixed with one sprocket.

7. The air-driven rotary-arm fume hood of claim 3, wherein: The inner bottom of the smoke guide cover is hingedly connected with two groups of guide plates, and the outer part of the two groups of guide plates is sleeved with an 8-shaped transmission belt; The rotating end of one of the guide plates is fixed with a guide motor.

8. The air-driven rotary-arm fume hood of claim 3, wherein: The outer fixed plate lower part is provided with a clamping groove on one side close to each other; the cover body is provided with a clamping port at the front end; the clamping port is provided with clamping rails on both sides, and elastic clamping plates are movably clamped on the clamping rails; a fixed-point smoking assembly is clamped at the clamping port, and the fixed-point smoking assembly comprises a spring pipe, and a suction nozzle is fixed at the bottom of the spring pipe; a frame seat is fixed at the top of the spring pipe, and clamping edges are integrally formed on both sides of the top of the frame seat; the clamping edges are movably clamped with the clamping groove.

9. The air-driven rotary arm fume hood of claim 1, wherein: The cantilever body is a Y-shaped structure.

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