Exhaust gas extraction equipment

Abstract

The present invention discloses an exhaust gas extraction device, including a main pipeline, a sliding trolley, an exhaust pipe structure, an exhaust nozzle and a fan. The fan is connected to the main pipeline to exhaust the exhaust gas. The main pipeline is connected to a plurality of pipeline joints, and a valve structure is provided in the middle of the pipeline joint; the exhaust pipe structure and the exhaust nozzle are connected to the sliding trolley in sequence; the sliding trolley is installed on the main pipeline and can move back and forth, and the sliding trolley is provided with a valve opening structure; the sliding trolley moves to the middle of the pipeline joint, and the valve opening structure pushes the valve structure to open the exhaust pipe structure, and the exhaust pipe structure is connected to the main pipeline. The exhaust gas extraction device provided by the present invention has a valve structure for exhaust on the main pipeline, and a valve opening structure on the sliding trolley. The sealing performance of the connection is good, and a stable and reliable seal can be guaranteed even after long-term use; the universal accessories of the equipment can be purchased on-site, which improves the efficiency of engineering installation and reduces equipment costs.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, in particular to tail gas extraction equipment. Background Art

[0002] In car repair shops, car inspection stations or workshops with a large amount of exhaust emissions, exhaust extraction equipment is often needed to ensure that the air is not polluted by exhaust gas and to ensure safety and environmental protection in the workshop. An exhaust extraction equipment in the prior art includes an external hanger, a profile slide, a sealing end cover, a sealing rubber plate, a sliding trolley, a rubber straw, a suction nozzle, a fan and an exhaust pipe. The profile slide is fixed on the external hanger, and a sealing strip of the same length as the profile slide is installed at the joint of the profile slide. The sliding trolley is installed on the profile slide and can move left and right. A rubber straw and a suction nozzle are connected below to directly collect automobile exhaust. A sealing end cover is installed at one end of the profile slide, and a fan and an exhaust pipe are installed at the other end to discharge the collected automobile exhaust to the outside. The main exhaust duct is integrated on the profile slide, so the profile slide needs to be customized and cannot be purchased locally, which is inconvenient to transport. The joints of the profile slide rails are clamped and sealed by two obliquely arranged sealing rubber plates. The sealing rubber plates are expensive, and long-term use of the rubber plates will cause aging and cause air leakage, increasing energy consumption.

[0003] Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0004] In view of the above technical problems, the present invention provides an exhaust gas extraction device, wherein the main pipeline is provided with an exhaust valve structure, the sliding trolley is provided with a valve opening structure, the joint has good sealing performance, and stable and reliable sealing can be guaranteed even after long-term use; the universal accessories of the equipment can be purchased locally, thereby improving the engineering installation efficiency and reducing the equipment cost.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] An exhaust gas extraction device, comprising:

[0007] Main pipes installed in suspension;

[0008] A fan connected to the main pipeline to discharge the exhaust gas;

[0009] A pipeline joint connected to the main pipeline, wherein the pipeline joint is provided with a valve structure in a closed state;

[0010] A sliding trolley is installed on the main pipeline and can move back and forth, and the sliding trolley is provided with a valve opening structure;

[0011] A pumping and exhausting pipe structure, which is connected to the sliding trolley and has an outlet end located at the valve structure;

[0012] An exhaust nozzle, one end of which is connected to the inlet end of the exhaust pipe structure, and the other end of which is connected to the exhaust outlet;

[0013] The sliding trolley moves to the pipeline joint, the valve opening structure pushes open the valve structure, and the pumping and exhausting pipe structure is connected to the main pipeline.

[0014] The exhaust gas extraction equipment mentioned above has an exhaust valve structure on the main pipeline and a valve opening structure on the sliding trolley. The joints have good sealing performance and can ensure stable and reliable sealing even after long-term use. The main pipelines are connected as a whole through pipe joints, and there is no need to customize profile slide rail accessories. The universal accessories of the equipment can be purchased locally, which improves the engineering installation efficiency and reduces the equipment cost.

[0015] Furthermore, the outer cylindrical surface in the middle of the pipe joint has a valve fixing hole; the valve structure includes a sealing positioning sleeve, a valve plate, a valve plate positioning sub-sleeve and a valve plate spring, and a valve plate positioning female sleeve extends from one surface of the valve plate;

[0016] The sealing positioning sleeve is fixed to the valve fixing hole; the valve plate is in sealing cooperation with the sealing positioning sleeve;

[0017] The valve plate positioning sleeve is fixed on the pipe body of the pipe joint and arranged along its diameter direction. The valve plate positioning sleeve is connected to the valve plate positioning sleeve. The valve plate spring is arranged in the hollow interior. The valve plate spring presses the valve plate against the sealing positioning sleeve.

[0018] The valve structure of the exhaust gas extraction device realizes the switching function by pressing and releasing the sealing positioning sleeve through the valve plate, and the operation is stable and reliable.

[0019] Furthermore, a locking structure is provided on the valve plate, including a valve plate buckle, a locking spring, a locking rope, a pressure cover, a top pin and a top pin spring; the valve plate is symmetrically provided with locking grooves and spring retaining edges on both sides of the valve plate positioning sleeve;

[0020] The valve plate buckle is located in the buckle groove, and the pressure cover and the edge of the buckle groove fix and press the valve plate buckle tightly; the sealing positioning sleeve is provided with a buckle hole, and the buckle spring is installed between the spring retaining edge and the valve plate buckle, so that the valve plate buckle is pushed outward and extends into the buckle hole;

[0021] A top pin circular sleeve is provided in the middle of the valve plate, and the top pin passes through the top pin circular sleeve, and the top pin is sealed and matched with the top pin circular sleeve; the rotation of the top pin in the top pin circular sleeve is limited, and the top pin can move axially in the top pin circular sleeve; the top pin spring sleeve is mounted on the top pin and pressed inside the top pin circular sleeve, and the top pin is pressed and fixed on the top pin circular sleeve; the two ends of the locking rope respectively fix the valve plate buckle, and the middle passes through the valve plate positioning female sleeve and the top pin, and the top pin is pushed open, and the locking rope tightens the valve plate buckle to make it disengage from the locking hole.

[0022] The lock structure ensures that the valve plate is in a stable and reliable closed state, and avoids being pushed open by the external atmospheric pressure. Because the fan draws exhaust gas outward, the inside of the main pipeline is in a low-pressure state.

[0023] Further, the sliding trolley includes a mounting seat, and the valve opening structure includes a push spring, a pulley frame, a push wheel, a movable pulley, a locking pull rope and a pull box;

[0024] The push wheel and the movable pulley 1 are respectively connected to the two ends of the pulley frame; the pulley frame is sleeved in the mounting seat; the mounting seat has an inner step, and the push spring is sleeved in the mounting seat and is located between the inner step and the pulley frame; one end of the locking pull rope is fixed, passing through the movable pulley 1 in the middle, and the other end is connected to the pull box; the pull box is fixed on the exhaust pipe structure, and the pull box has a tightening position and a loosening position. When the pull box is located in the loosening position, the push wheel presses and opens the valve structure, and when the pull box is located in the tightening position, the valve structure is closed.

[0025] The valve structure can be opened and closed by pulling the draw wire box to put it in a tightened position or a loosened position, which is simple to operate and reliable in action.

[0026] Further, the sliding trolley includes a mounting seat, a pulley assembly and a fixing pin, two symmetrical pulley seats extend from the mounting seat, the pulley assembly includes two symmetrical pulley plates, pulley wheels and positioning wheels, the pulley plates are respectively mounted with the pulley wheels and the positioning wheels, the pulley seat and the pulley plate are hinged, the pulley plate has an upper positioning seat, the pulley seat has a lower positioning seat, and a plurality of fixing pins are arranged through the upper positioning seat and the lower positioning seat;

[0027] The pipe joint is provided with a positioning recess, the sliding trolley moves to the middle of the pipe joint, and the positioning wheel is located in the positioning recess.

[0028] The sliding trolley is installed on the main pipeline. Before installation, remove all the fixing pins, rotate the two pulley plates to the maximum angle, and embrace the main pipeline. After installation, insert all the fixing pins to complete the installation of the sliding trolley. The sliding trolley is easy and quick to install.

[0029] Further, the pipe joint comprises a joint body and a pipe buckle structure, wherein the pipe buckle structure is in two sets, one end of which is respectively sealed and sleeved inside the two ends of the joint body, and the other end of the pipe buckle structure is respectively sealed and sleeved inside the main pipe;

[0030] The tube buckle structure is provided with a plurality of tube buckle spring pieces and tube buckle spring buckles, the tube buckle spring buckles are pressed on the tube buckle spring pieces and have an outward elastic force, the main pipe is provided with a plurality of buckle holes, and the tube buckle spring buckles are buckled into the buckle holes.

[0031] The pipe buckle structure connects the joint body and the main pipe to ensure that the outer cylindrical surfaces of the two are flush after the connection, which is conducive to the sliding of the sliding trolley.

[0032] Furthermore, buckling rings are respectively provided inside the two ends of the joint body, and the tube buckle structure is provided with a plurality of spring buckle compression springs and a joint spring buckle. The joint spring buckle is pressed against the spring buckle compression spring to support the inner wall of the joint body. The buckling ring is located between the step surface of the tube buckle structure and the joint spring buckle to limit the axial movement of the tube buckle structure.

[0033] The connection method between the above-mentioned pipe buckle structure and the joint body enables the pipe buckle structure to rotate on the joint body, making it convenient for the pipe buckle of the pipe buckle structure to be buckled into the buckle hole of the main pipe, making the connection faster.

[0034] Further, the extraction pipe structure includes a fixed sleeve, several levels of telescopic sleeves, a balancer, a fixed pulley, a movable pulley 2 and a telescopic steel rope. Two balancers are symmetrically arranged outside the fixed sleeve, two fixed pulleys are symmetrically installed inside the fixed sleeve, and the movable pulley 2 is installed in the last level of the telescopic sleeve. Both ends of the telescopic steel rope are respectively fixed on the two balancers, and pass through the two fixed pulleys and the movable pulley 2 in the middle.

[0035] Through the action of the balancer, the exhaust pipe structure is stretched out when in use and automatically retracted after use, which is convenient to use.

[0036] Furthermore, the exhaust pipe structure includes a three-way valve and a hose. The middle of the three-way valve is connected to the last-stage pipe of the telescopic sleeve, and both sides are connected to the hoses respectively, and the hoses are connected to the tail exhaust gun.

[0037] By adjusting the three-way valve, single-station or double-station working switching, as well as left and right single-station switching can be achieved.

[0038] Furthermore, the exhaust gas extraction equipment also includes a control system, which is provided with a display screen and a bracket, the display screen is mounted on the bracket, and the bracket is mounted around the exhaust pipe structure.

[0039] The device can be operated through the control system's display screen, the fan can be controlled on and off, and environmental parameters such as PM2.5 values ​​can be viewed on the display screen.

[0040] The exhaust gas extraction device further includes a filter element, which is installed on the main pipeline at the air inlet end of the fan. The filter element plays a role in purifying the exhaust gas, making the exhausted air cleaner and more environmentally friendly.

[0041] Furthermore, a plurality of pipe hanging pulls are provided on the main pipeline, and the main pipeline is suspended and installed by the pipe hanging pulls.

[0042] Compared with the prior art, the present invention has the following technical advantages:

[0043] 1. The main pipeline of the exhaust gas extraction equipment is equipped with an exhaust valve structure, and the sliding trolley is equipped with a valve opening structure. The joint has good sealing performance and can ensure stable and reliable sealing even after long-term use;

[0044] 2. The main pipeline is connected as one through the pipeline joint, and there is no need to customize the profile slide rail accessories. The universal accessories of the equipment can be purchased locally, which improves the efficiency of engineering installation and reduces equipment costs;

[0045] 3. The sliding trolley is installed on the main pipeline. Before installation, remove all the fixing pins, rotate the two pulley plates to the maximum angle, and surround the main pipeline. After installation, insert all the fixing pins to complete the installation of the sliding trolley. The installation of the sliding trolley is convenient and quick;

[0046] 4. The exhaust pipe structure stretches out during use through the balancer and automatically retracts after use, making it easy to use;

[0047] 5. A three-way valve is set on the extraction pipe structure. By adjusting the three-way valve, single-station or double-station working switching, as well as left and right single-station switching can be achieved;

[0048] 6. Set up a control system. The equipment can be operated through the display screen of the control system, the fan switch can be controlled, and environmental parameters such as PM2.5 value can be viewed on the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a front view of an embodiment of the present invention;

[0050] Figure 2 yes Figure 1 A partial diagram without the main pipeline;

[0051] Figure 3 yes Figure 2 A cross-sectional view of

[0052] Figure 4 yes Figure 2 Side view of

[0053] Figure 5 yes Figure 1 The front view of the central extraction pipe structure after it is folded;

[0054] Figure 6 yes Figure 1 Exploded view of the pipe joint;

[0055] Figure 7 yes Figure 6 Cross-sectional view of the pipe joint after assembly;

[0056] Figure 8 yes Figure 1 A three-dimensional view of the pipe joint in the middle;

[0057] Fig. 9 yes Figure 7 Side view of

[0058] Fig.10 yes Figure 7 Exploded view of the center joint body, valve structure and lock structure;

[0059] Fig.11 yes Fig.10 A three-dimensional view of the middle valve plate;

[0060] Fig.12 yes Fig.11 Bottom view of the middle valve plate;

[0061] Fig.13 yes Fig.10 A three-dimensional diagram of the middle sealing positioning sleeve;

[0062] Fig.14 yes Figure 1 A three-dimensional view of the sliding trolley;

[0063] Fig.15 yes Fig.14 The main view of

[0064] Fig.16 yes Fig.15 Side view of

[0065] Fig.17 yes Fig.14 Exploded diagram of

[0066] Fig.18 yes Fig.17 Exploded view of the middle pulley assembly;

[0067] Fig.19 yes Fig.17 A perspective view of the middle pulley frame;

[0068] Fig. 20 yes Fig.16 Assembly explosion diagram of the middle pulley frame, the top push pulley and the movable pulley 1;

[0069] Fig.21 yes Figure 1 Exploded diagram of the central extraction pipe structure;

[0070] Fig. 22 yes Figure 1 Partial cross-sectional view of the middle pipe joint, sliding trolley and extraction pipe structure;

[0071] Fig.23 yes Fig. 22 Side sectional view of . DETAILED DESCRIPTION

[0072] The present invention will be further described in detail below with reference to the embodiments in the accompanying drawings.

[0073] like Figures 1 to 23 As shown, an embodiment of the exhaust gas extraction equipment of the present invention.

[0074] like Figure 1 As shown, the exhaust gas extraction equipment includes a main pipeline 10, a fan 20, a plurality of pipeline joints 30, a sliding trolley 40, an exhaust pipe structure 50 and an exhaust nozzle 60. The main pipeline 10 is suspended and installed; the fan 20 is connected to the main pipeline 10 to exhaust the exhaust gas; the main pipelines 10 are connected through the pipeline joint 30, and a valve structure 31 in a closed state is provided in the middle of the pipeline joint 30; the sliding trolley 40 is installed on the main pipeline 10 and can move back and forth, and the sliding trolley 40 is provided with a valve opening structure 41; the exhaust pipe structure 50 is connected to the sliding trolley 40, and the outlet end is located at the valve structure 31; one end of the exhaust nozzle 60 is connected to the inlet end of the exhaust pipe structure 50, and the other end is connected to the exhaust gas outlet; the sliding trolley 40 moves to the middle of the pipeline joint 30, and the valve opening structure 41 pushes the valve structure 31 to open the exhaust pipe structure 50, and the exhaust pipe structure 50 is connected to the main pipeline 10.

[0075] The exhaust gas extraction equipment has an exhaust valve structure on the main pipeline and a valve opening structure on the sliding trolley. The joints have good sealing performance and can ensure stable and reliable sealing even after long-term use. The main pipelines are connected as one through pipe joints, and there is no need to customize profile slide rail accessories. The universal accessories of the equipment can be purchased locally, which improves the efficiency of engineering installation and reduces equipment costs.

[0076] like Fig.10As shown, the outer cylindrical surface in the middle of the pipe joint 30 has a valve fixing hole 32, and the valve fixing hole 32 has an extending edge outward; the valve structure 31 includes a sealing positioning sleeve 311, a valve plate 312, a valve plate positioning sub-sleeve 313 and a valve plate spring 314, and a valve plate positioning female sleeve 315 extends from one surface of the valve plate 312.

[0077] like Figure 7 As shown, the sealing positioning sleeve 311 is welded on the valve fixing hole 32; Fig. 9 and Fig.13 As shown, the sealing positioning sleeve 311 is provided with an inner ring rib 3112 , and a valve plate O-ring 316 is provided on the inner ring rib 3112 . The valve plate 312 and the sealing positioning sleeve 311 are sealed and matched with each other through the valve plate O-ring 316 .

[0078] like Fig. 9 As shown, the valve plate positioning sleeve 313 is fixed on the pipe body of the pipe joint 30 and arranged along its diameter direction. The valve plate positioning sleeve 313 is connected to the valve plate positioning sleeve 315 in a sleeve arrangement. A valve plate spring 314 is arranged in the hollow interior. The valve plate spring 314 presses the valve plate 312 against the sealing positioning sleeve 311.

[0079] The valve structure of the exhaust gas extraction equipment realizes the switching function by pressing and releasing the sealing positioning sleeve through the valve plate, and the action is stable and reliable.

[0080] like Fig. 9 and Fig.10 As shown, a locking structure 33 is provided on the valve plate 312, including a valve plate buckle 331, a locking spring 332, a locking rope 334, a pressure cover 333, a top pin 335 and a top pin spring 336; Fig.11 As shown, the valve plate 312 is symmetrically provided with locking grooves 337 and spring retaining edges 338 on both sides of the valve plate positioning female sleeve 315.

[0081] like Fig. 9 As shown, the valve plate buckle 331 is located in the buckle groove 337, and the pressure cover 333 and the edge of the buckle groove 337 are fixed and pressed against the valve plate buckle 331; Fig.13 As shown, the sealing positioning sleeve 311 has a locking hole 3111 , and the locking spring 332 is installed between the spring retaining edge 338 and the valve plate buckle 331 , so that the valve plate buckle 331 is pushed outward and extends into the locking hole 3111 .

[0082] like Fig. 9 As shown, a top pivot sleeve 3121 is disposed in the center of the valve plate 312, and a top pivot sleeve 335 is disposed through the top pivot sleeve 3121, and the top pivot sleeve 335 is sealed with the top pivot sleeve 3121. Fig.10 and Fig.12As shown, the middle section of the top pivot 335 is an axial hexagonal structure, and the top pivot circular sleeve 3121 has an inner hexagonal hole that matches the axial hexagonal structure of the top pivot 335. The axial hexagonal structure cooperates with the inner hexagonal hole to limit the rotation of the top pivot 335 in the top pivot circular sleeve 3121, and the top pivot 335 can move axially in the top pivot circular sleeve 3121. The top pivot spring 336 is sleeved on the top pivot 335 and pressed tightly against the inside of the top pivot circular sleeve 3121, and the top pivot 335 is pressed and fixed on the top pivot circular sleeve 3121; the two ends of the locking rope 334 respectively fix the valve plate buckle 331, and the middle passes through the valve plate positioning female sleeve 315 and the top pivot 335, and the top pivot 335 is pushed open, and the locking rope 334 tightens the valve plate buckle 331 to disengage it from the locking hole 3111.

[0083] The lock structure ensures that the valve plate is in a stable and reliable closed state, and avoids being pushed open by the external atmospheric pressure. Because the fan draws exhaust gas outward, the inside of the main pipeline is in a low-pressure state.

[0084] like Figure 4 , Fig.16 and Fig.17 As shown, the sliding trolley 40 includes a mounting seat 42, and the valve opening structure 41 includes a push spring 411, a pulley frame 412, a push wheel 413, a movable pulley 414, a locking pull rope 415 and a pull box 416. Fig.19 and Fig. 20 As shown, the push wheel 413 and the movable pulley 414 are respectively connected to the two ends of the pulley frame 412, and are fixed to the brackets 72 at the two ends of the pulley frame 412 through pins and buckles; the pulley frame 412 is sleeved in the mounting seat 42, and the outer cylindrical surface of the pulley frame 412 and the inner cylindrical surface of the mounting seat 42 respectively have four axial protrusions that fit together, and the pulley frame 412 can move axially in the mounting seat 42; the mounting seat 42 has an inner step 421, and the push spring 411 is sleeved in the mounting seat 42 and is located between the inner step 421 and the pulley frame 412.

[0085] like Figure 4 and Fig.23 As shown, one end of the locking rope 415 is fixed, passes through the movable pulley 1 414 in the middle, and then transfers through the side fixed pulley 1 417 and the side fixed pulley 2 418, and the other end is connected to the pull box 416. Fig.21 As shown, the draw box 416 is fixed on the pumping pipe structure 50, and the draw box 416 has a tightening position 4161 and a loosening position 4162. When the draw box 416 is located at the loosening position 4162, the push wheel 413 presses and opens the valve structure 31, and when the draw box 416 is located at the tightening position 4161, the valve structure 31 is closed. Fig. 22 As shown, the valve structure 31 is in an open state; Figure 7 As shown, the valve structure 31 is in a closed state.

[0086] The valve structure can be opened and closed by pulling the draw wire box to put it in a tightened position or a loosened position, which is simple to operate and reliable in action.

[0087] like Fig.14 As shown, the sliding trolley 40 also includes a trolley assembly 43 and a fixing pin 44, and two symmetrical trolley seats 45 extend from the mounting seat 42. Fig.17 As shown, the pulley assembly 43 includes two symmetrical pulley plates 431, a pulley wheel 432 and a positioning wheel 433. Fig.18 As shown, a pulley wheel 432 and a positioning wheel 433 are respectively installed on the pulley plate 431. The positioning wheel 433 is installed in the movable hole of the positioning wheel 433 through a pin and a retaining spring. A positioning torsion spring 436 is also provided on the positioning wheel 433. The positioning torsion spring 436 is fixed to the torsion spring installation hole through a pin and a retaining spring. The extended end of the positioning torsion spring 436 is sleeved on the pins on both sides of the pulley positioning wheel 433, pressing down the pulley positioning wheel 433, and the rear end of the positioning torsion spring 436 is buckled on the torsion spring buckle 437.

[0088] like Figures 14 to 16 As shown, the pulley seat 45 and the pulley plate 431 are hinged, the pulley plate 431 has an upper positioning seat 434, the pulley seat 45 has a lower positioning seat 435, and a plurality of fixing pins 44 are arranged through the upper positioning seat 434 and the lower positioning seat 435.

[0089] like Fig.15 and Fig. 22 As shown, the mounting seat 42 is externally mounted with a pulley connector 46, which is then mounted on the pumping and exhausting pipe structure 50, which is achieved by an inner convex ring inside the pulley connector 46 and outer concave rings on the mounting seat 42 and the pumping and exhausting pipe structure 50, respectively.

[0090] like Figure 8 As shown, a positioning recess 34 is provided on the pipe joint 30 , and the sliding trolley 40 moves to the middle of the pipe joint 30 , and the positioning wheel 433 is pressed into the positioning recess on the joint body 35 under the action of the positioning torsion spring 436 , thereby positioning the sliding trolley 40 .

[0091] The sliding trolley is installed on the main pipeline. Before installation, remove all the fixing pins, rotate the two pulley plates to the maximum angle, and embrace the main pipeline. After installation, insert all the fixing pins to complete the installation of the sliding trolley. The sliding trolley is easy and quick to install.

[0092] like Figure 6 and Figure 7 As shown, the pipe joint 30 includes a joint body 35 and a pipe buckle structure 36. The pipe buckle structure 36 is divided into two sets, one end of which is respectively mounted inside the two ends of the joint body 35 through an O-ring sealing sleeve, and the other end of the pipe buckle structure 36 is respectively mounted inside the main pipe 10 through an O-ring sealing sleeve.

[0093] like Figure 6 As shown, the tube buckle structure 36 is provided with a plurality of tube buckle spring pieces 361 and tube buckle spring buckles 362. The tube buckle spring buckles 362 are pressed tightly against the tube buckle spring pieces 361 and have an outward elastic force, as shown in FIG. Figure 1 As shown, the main pipe 10 has a plurality of buckle holes 11 , into which the buckle spring buckles 362 are buckled.

[0094] The pipe buckle structure connects the joint body and the main pipe to ensure that the outer cylindrical surfaces of the two are flush after the connection, which is conducive to the sliding of the sliding trolley.

[0095] like Figure 6 and Figure 7 As shown, buckling rings 37 are respectively provided inside the two ends of the joint body 35, and the tube buckle structure 36 is provided with a plurality of spring buckle compression springs 363 and joint spring buckles 364. The joint spring buckles 364 are pressed against the spring buckle compression springs 363 to support the inner wall of the joint body 35. The buckling ring 37 is located between the step surface of the tube buckle structure 36 and the joint spring buckle 364 to limit the axial movement of the tube buckle structure 36.

[0096] The connection method between the pipe buckle structure and the joint body enables the pipe buckle structure to rotate on the joint body, making it convenient for the pipe buckle structure to buckle into the buckle hole of the main pipe, making the connection faster.

[0097] like Figure 3 , Fig.21 and Fig. 22 As shown, the pumping pipe structure 50 includes a fixed sleeve 51, several stages of telescopic sleeves 52, a balancer 53, a fixed pulley 54, a second movable pulley 55 and a telescopic steel rope 56. There are three stages of telescopic sleeves 52 in the figure. Two balancers 53 are symmetrically arranged outside the fixed sleeve 51, two fixed pulleys 54 are symmetrically installed inside the fixed sleeve 51, and a second movable pulley 55 is installed inside the last stage of the telescopic sleeve 52. Both ends of the telescopic steel rope 56 are fixed to the two balancers 53, respectively, and respectively transfer through the third side fixed pulley 59, and then pass through the two fixed pulleys 54 and the second movable pulley 55. The end of the fixed sleeve 51 has an outer concave ring, and the inner convex ring of the pulley connector 46 is sleeved on the outer concave ring of the fixed sleeve 51 to achieve the connection between the two.

[0098] Through the action of the balancer, the exhaust pipe structure is stretched out when in use and automatically retracted after use, which is convenient to use.

[0099] like Figure 2 and Figure 3 As shown, the exhaust pipe structure 50 also includes a three-way valve 57 and a hose 58. The three-way valve 57 is connected to the last stage pipe of the telescopic sleeve 52 in the middle, and is connected to the hoses 58 on both sides. The hoses 58 are connected to the tail exhaust gun.

[0100] By adjusting the three-way valve, single-station or double-station working switching, as well as left and right single-station switching can be achieved.

[0101] like Figure 2 and Figure 4 As shown, the exhaust gas extraction device further includes a control system 70, the control system 70 is provided with a display screen 71 and a bracket 72, the display screen 71 is mounted on the bracket 72, and the bracket 72 is mounted around the exhaust pipe structure 50. Figure 2 As shown, a tube-hanging bending member is installed on the bracket 72, and the hose 58 can be hung on the tube-hanging bending member.

[0102] The device can be operated through the control system's display screen, the fan can be controlled on and off, and environmental parameters such as PM2.5 values ​​can be viewed on the display screen.

[0103] like Figure 1 As shown, the exhaust gas extraction device also includes a filter element 80, which is installed on the main pipeline 10 at the air inlet end of the fan 20. The filter element 80 plays a role in purifying the exhaust gas, making the exhausted air cleaner and more environmentally friendly.

[0104] like Figure 1 As shown, a plurality of pipe hanging pulls 12 are provided on the main pipeline 10, and the main pipeline 10 is suspended and installed by the pipe hanging pulls 12.

[0105] like Figure 5 As shown, the three-stage telescopic sleeve 52 of the exhaust pipe structure 50 is folded, and the hose 58 can be hung on the pipe hanging bending piece when not in use.

[0106] The operation process of the exhaust gas extraction equipment is as follows: remove the hose from the pipe hanging bending part, pull it downward to extend the extraction pipe structure, connect the extraction nozzle to the external exhaust pipe, adjust the three-way valve to the work station that needs to be exhausted, pull the pull box to the release position, open the valve structure, start the fan on the display screen, and the equipment will exhaust the exhaust gas.

[0107] In summary, the present invention is as described in the specification and the illustrations, and actual samples are made and tested for multiple times. From the test results, it is proved that the invention can achieve the expected purpose and its practicality is beyond doubt. The above embodiments are only used to facilitate the description of the content of the invention, and are not formally limited to it; any equivalent embodiments made by partial changes or modifications made by anyone with common knowledge in the technical field of the invention without departing from the scope of the technical features and similar features of the present invention and using the technical content disclosed by the invention, all belong to the protection scope of the present invention.

Claims

1. An exhaust gas extraction device, characterized in that: include: Main pipes installed in suspension; A fan connected to the main pipeline to discharge the exhaust gas; A pipeline joint, connected to the main pipeline, wherein the pipeline joint is provided with a valve structure in a closed state; A sliding trolley is installed on the main pipeline and can move back and forth, and the sliding trolley is provided with a valve opening structure; A pumping and exhausting pipe structure, which is connected to the sliding trolley and has an outlet end located at the valve structure; An exhaust nozzle, one end of which is connected to the inlet end of the exhaust pipe structure, and the other end of which is connected to the exhaust outlet; The sliding trolley moves to the pipeline joint, the valve opening structure pushes open the valve structure, and the pumping and exhausting pipe structure is connected to the main pipeline; The sliding trolley includes a mounting seat, and the valve opening structure includes a push spring, a pulley frame, a push wheel, a movable pulley, a locking pull rope and a pull box; The push wheel and the movable pulley 1 are respectively connected to the two ends of the pulley frame; the pulley frame is sleeved in the mounting seat; the mounting seat has an inner step, and the push spring is sleeved in the mounting seat and is located between the inner step and the pulley frame; one end of the locking pull rope is fixed, passes through the movable pulley 1 in the middle, and the other end is connected to the draw box; the draw box is fixed on the exhaust pipe structure, and the draw box has a tightening position and a loosening position. When the draw box is located in the loosening position, the push wheel presses and opens the valve structure, and when the draw box is located in the tightening position, the valve structure is closed; The sliding trolley comprises a positioning wheel, and a positioning recess is provided on the pipe joint. The sliding trolley moves to the middle of the pipe joint, and the positioning wheel is located in the positioning recess.

2. The exhaust gas extraction equipment according to claim 1, characterized in that: The outer cylindrical surface in the middle of the pipe joint has a valve fixing hole; the valve structure includes a sealing positioning sleeve, a valve plate, a valve plate positioning sleeve and a valve plate spring, and a valve plate positioning sleeve extends from one surface of the valve plate; The sealing positioning sleeve is fixed to the valve fixing hole; the valve plate is in sealing cooperation with the sealing positioning sleeve; The valve plate positioning sleeve is fixed on the pipe body of the pipe joint and arranged along its diameter direction. The valve plate positioning sleeve is connected to the valve plate positioning sleeve. The valve plate spring is arranged in the hollow interior. The valve plate spring presses the valve plate against the sealing positioning sleeve.

3. The exhaust gas extraction equipment according to claim 2, characterized in that: The valve plate is provided with a lock structure, including a valve plate buckle, a lock spring, a lock pull rope, a pressure cover, a top hanging pin and a top hanging pin spring; the valve plate is symmetrically provided with a lock groove and a spring retaining edge on both sides of the valve plate positioning female sleeve; The valve plate buckle is located in the buckle groove, and the pressure cover and the edge of the buckle groove fix and press the valve plate buckle tightly; the sealing positioning sleeve is provided with a buckle hole, and the buckle spring is installed between the spring retaining edge and the valve plate buckle, so that the valve plate buckle is pushed outward and extends into the buckle hole; A top pin circular sleeve is provided in the middle of the valve plate, and the top pin passes through the top pin circular sleeve, and the top pin is sealed and matched with the top pin circular sleeve; the top pin is restricted from rotating in the top pin circular sleeve, and the top pin can move axially in the top pin circular sleeve, the top pin spring is sleeved on the top pin and is pressed inside the top pin circular sleeve, and the top pin is pressed and fixed on the top pin circular sleeve; the two ends of the locking rope respectively fix the valve plate buckle, and the middle passes through the valve plate positioning female sleeve and the top pin, the top pin is pushed open, and the locking rope tightens the valve plate buckle to make it disengage from the locking hole.

4. The exhaust gas extraction equipment according to claim 1, characterized in that: The sliding trolley includes a mounting seat, a pulley assembly and a fixing pin. Two symmetrical pulley seats extend from the mounting seat. The pulley assembly includes two symmetrical pulley plates, a pulley wheel and the positioning wheel. The pulley plates are respectively mounted with the pulley wheels and the positioning wheel. The pulley seat and the pulley plate are hinged. The pulley plate is provided with an upper positioning seat. The pulley seat is provided with a lower positioning seat. A plurality of fixing pins are arranged through the upper positioning seat and the lower positioning seat.

5. The exhaust gas extraction equipment according to claim 1, characterized in that: The pipe joint comprises a joint body and a pipe buckle structure, wherein the pipe buckle structure is in two sets, one end of which is respectively sealed and sleeved inside the two ends of the joint body, and the other end of the pipe buckle structure is respectively sealed and sleeved inside the main pipe; The tube buckle structure is provided with a plurality of tube buckle spring pieces and tube buckle spring buckles, the tube buckle spring buckles are pressed on the tube buckle spring pieces and have an outward elastic force, the main pipe is provided with a plurality of buckle holes, and the tube buckle spring buckles are buckled into the buckle holes.

6. The exhaust gas extraction equipment according to claim 5, characterized in that: Buckling rings are respectively provided inside the two ends of the joint body, and the tube buckle structure is provided with a plurality of spring buckle compression springs and a joint spring buckle. The joint spring buckle is pressed against the spring buckle compression spring to support the inner wall of the joint body. The buckling ring is located between the step surface of the tube buckle structure and the joint spring buckle to limit the axial movement of the tube buckle structure.

7. The exhaust gas extraction equipment according to claim 1, characterized in that: The extraction pipe structure includes a fixed sleeve, several stages of telescopic sleeves, a balancer, a fixed pulley, a movable pulley 2 and a telescopic steel rope. Two balancers are symmetrically arranged outside the fixed sleeve, two fixed pulleys are symmetrically installed inside the fixed sleeve, and the movable pulley 2 is installed in the last stage of the telescopic sleeve. Both ends of the telescopic steel rope are respectively fixed on the two balancers, and pass through the two fixed pulleys and the movable pulley 2 in the middle.

8. The exhaust gas extraction equipment according to claim 7, characterized in that: The exhaust pipe structure includes a three-way valve and a hose. The middle of the three-way valve is connected to the last-stage pipe of the telescopic sleeve, and both sides are connected to the hoses respectively. The hoses are connected to the tail exhaust gun.

9. The exhaust gas extraction equipment according to claim 1, characterized in that: It also includes a control system, which is provided with a display screen and a bracket, the display screen is installed on the bracket, and the bracket is installed in an embrace on the exhaust pipe structure.

10. The exhaust gas extraction equipment according to claim 1, characterized in that: It also includes a filter element, which is installed on the main pipeline and located at the air inlet end of the fan.

11. The exhaust gas extraction equipment according to claim 1, characterized in that: The main pipeline is provided with a plurality of pipe hanging pulls, through which the main pipeline is suspended and installed.

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