A protective device for the air duct of the secondary lining trolley and the cloth hanging trolley

Abstract

The present invention provides a protective device for air ducts of a secondary lining trolley and a cloth hanging trolley, comprising an air duct main body, the outer side of the air duct main body is evenly provided with support ring assemblies along its axial direction, the outer side of the support ring assembly is sleeved with a sliding wheel group, the sliding wheel group is detachably fixedly mounted inside the tunnel, and a protective net is provided on the top of the air duct main body between two adjacent sliding wheel groups, and the protective net is fixedly supported between two adjacent sliding wheel groups; in the present invention, the outer side of the air duct main body is evenly provided with support ring assemblies, and the sliding wheel group is sleeved on the support ring assembly, and when the secondary lining trolley and the cloth hanging trolley move through, the sliding wheel group can slide inside the fixed sleeve of the trolley to avoid contact between the air duct main body and the inner wall of the fixed sleeve of the trolley, thereby avoiding direct contact between the trolley and the air duct main body to cause wear of the air duct main body.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel ventilation, and specifically relates to a protective device for air ducts of a secondary lining trolley and a cloth hanging trolley. Background Technology

[0002] During tunnel construction, air ducts are usually used for ventilation in order to ensure good ventilation in the construction environment. However, in the actual construction process, the movement of the secondary lining trolley and the cloth hanging trolley in the tunnel can easily damage the air duct, causing problems such as air duct falling off and air leakage, affecting the construction progress and construction environment.

[0003] In the prior art, for example, the Chinese utility model patent document with the authorization announcement number CN213953650U discloses a device for protecting the tunnel face wind tube, and the Chinese utility model patent document with the authorization announcement number CN217080494U discloses a tunnel lining trolley and ventilation duct cross protection device, wherein the wind tube (air duct) is suspended in the tunnel, and when the secondary lining trolley and the cloth hanging trolley move through, the outer wall of the air duct directly rubs against the inside of the fixed sleeve of the trolley, which can easily cause the air duct to be damaged, fall off, leak, etc.; and during the construction process, it is easy for falling objects to contact the top of the air duct, causing the air duct to be damaged and leak.

[0004] Therefore, it is necessary to design a protective device for the air duct of the secondary lining trolley and the cloth hanging trolley, which can avoid direct contact with the air duct and cause wear when the secondary lining trolley and the cloth hanging trolley pass by, and can also prevent falling objects from damaging the air duct during the construction process to solve the current technical problems. SUMMARY OF THE INVENTION

[0005] In view of the shortcomings of the prior art, the present invention provides a protective device for the air duct of the secondary lining trolley and the cloth hanging trolley, which can avoid direct contact with the air duct and cause wear when the secondary lining trolley and the cloth hanging trolley pass by, and can also prevent falling objects from damaging the air duct during the construction process.

[0006] The technical solution of the present invention is: a protection device for the air ducts of the secondary lining trolley and the cloth hanging trolley, including an air duct main body. Along the axial direction of the air duct main body, support ring assemblies are uniformly arranged on the outside. A sliding wheel group is sleeved on the outside of the support ring assemblies, and the sliding wheel group is detachably and fixedly installed inside the tunnel. A protective net is arranged on the top of the air duct main body between two adjacent sliding wheel groups, and the protective net is fixedly supported between two adjacent sliding wheel groups; the protective net has a semi-circular arc-shaped protective net main body that matches the top of the air duct main body. At least two protective support rods parallel to the axis of the air duct main body are uniformly arranged on the protective net main body, and a protective connecting piece is arranged at the end of the protective support rod; the sliding wheel group has a pulley support cylinder that is detachably and fixedly sleeved on the outside of the air duct main body. Pulleys are uniformly arranged on the outside of the pulley support cylinder, and an insertion seat that matches the protective connecting piece is fixedly arranged on the outside of the pulley support cylinder.

[0007] An insertion hole is opened on the insertion seat; the protective connecting piece has a protective adjustment screw rod that is threadedly connected to the inner side of the end of the protective support rod. A hexagonal prism is fixedly arranged at one end of the protective adjustment screw rod away from the protective support rod, and a retaining ring is fixedly arranged at one end of the hexagonal prism away from the protective adjustment screw rod. A plug bolt that matches the insertion hole is fixedly arranged on one side of the retaining ring away from the hexagonal prism.

[0008] The support ring assembly has support retaining edges that respectively correspond to the two ends of the pulley support cylinder, and the support retaining edges are fixedly arranged on the outside of the air duct main body; the pulley support cylinder has an upper arc plate and a lower arc plate. One end of the upper arc plate is hinged to one end of the lower arc plate, and the other end of the upper arc plate and the other end of the lower arc plate are detachably and fixedly connected through a bolt and nut mechanism.

[0009] A sleeve is slidably sleeved on the outside of the air duct main body, and the sleeve is fixedly installed on the secondary lining trolley or the cloth hanging trolley. Tapered guide cylinders are fixedly arranged at both ends of the sleeve, and the inner wall of the sleeve is in sliding fit with the pulley.

[0010] Door-shaped retaining frames are fixedly arranged at the tops of both ends of the sleeve. Hanging claws are arranged above both sides of the door-shaped retaining frames. A hanging screw rod is rotatably arranged at the bottom of one end of the hanging claw. A threaded connection seat is threadedly connected to the outside of the hanging screw rod, and the threaded connection seat is fixedly arranged on the side of the sleeve. A hanging fixing nut that abuts against the bottom of the threaded connection seat is threadedly assembled on the outside of the hanging screw rod.

[0011] A support is provided below the sliding wheel set, and the sliding wheel set is detachably fixedly mounted inside the tunnel through the support; the support has a mounting base, a rotation locking assembly is provided on the top of the mounting base, a lifting and lowering adjustment rod is provided on the rotation locking assembly, and a connection assembly for detachably and fixedly connecting with the bottom of the sliding wheel set is provided on the upper end of the lifting and lowering adjustment rod.

[0012] The lifting and lowering adjustment rod has an adjustment tube, and the upper and lower ends of the adjustment tube are respectively threadedly connected to an upper support rod and a lower support rod, and the outer side of the lower end of the upper support rod and the outer side of the upper end of the lower support rod have external threads with opposite spiral directions; the connecting component is arranged at the upper end of the upper support rod, and the rotating locking component is arranged at the lower end of the lower support rod.

[0013] The swivel lock assembly comprises two swivel support plates symmetrically fixedly arranged on the top of the mounting base plate, a swivel seat is rotatably arranged between the two swivel support plates, an arc-shaped slideway with the rotating axis of the swivel seat as the center is provided on the swivel support plate, a card slot connected thereto is provided on the lower side of the upper end of the arc-shaped slideway, the lower end of the lower support rod is fixedly arranged on the top of the swivel seat, a sliding tube is slidably arranged on the lower support rod, a lifting plate is fixedly arranged on the outer side of the sliding tube, a supporting ring is fixedly arranged on the lower support rod above the sliding tube, a supporting spring is sleeved on the outer side of the lower support rod between the supporting ring and the sliding tube, and a clamping bolt matching the arc-shaped slideway is fixedly arranged on one side of the sliding tube; when the lower support rod is perpendicular to the mounting base plate, the clamping bolt is clamped into the inner part of the clamping slot under the elastic force of the supporting spring.

[0014] A diagonal brace assembly is provided between the lifting adjustment rod and the mounting base plate, and the diagonal brace assembly comprises an upper diagonal brace plate and a lower diagonal brace plate, the upper end of the upper diagonal brace plate is hinged to one side of the lower support rod, the lower end of the upper diagonal brace plate is rotatably connected to the upper part of the lower diagonal brace plate through a hinge shaft, the upper end of the lower diagonal brace plate is detachably fixedly connected to the lower part of the upper diagonal brace plate through a diagonal brace fixing bolt, and the bottom end of the lower diagonal brace plate is hinged to the top of the mounting base plate.

[0015] The connection assembly has a connection seat fixedly arranged at the bottom of the pulley support tube, and a U-shaped connection groove corresponding to the upper end of the upper support rod is provided on the connection seat. A transition slide column matching the U-shaped connection groove is fixedly arranged concentrically on the upper end of the upper support rod, and a baffle is fixedly arranged concentrically on the end of the transition slide column away from the upper support rod. A threaded locking tube is threadedly sleeved on the outer side of the upper end of the upper support rod, and a locking groove matching the threaded locking tube is provided at the bottom of the connection seat.

[0016] Beneficial effects of the present invention: ​​

[0017] (1) In the present invention, support ring assemblies are evenly arranged on the outer side of the air duct main body, and sliding wheel groups are sleeved on the support ring assemblies. When the secondary lining trolley and the cloth hanging trolley move through, the sliding wheel groups can slide inside the fixed sleeves of the trolleys, avoiding contact between the air duct main body and the inner walls of the fixed sleeves of the trolleys, thereby avoiding wear of the air duct main body caused by direct contact between the trolley and the air duct main body;

[0018] (2) A protective net is arranged on the top of the air duct main body between two adjacent sliding wheel groups. The protective net can play a protective role above the air duct main body, avoiding damage to the air duct main body caused by falling objects during construction directly falling on the top of the air duct main body;

[0019] (3) The protective net is fixedly supported between two adjacent sliding wheel groups. Through the fixed support of the protective net, the air duct main body between two adjacent sliding wheel groups can be tensioned, avoiding wear caused by the air duct main body sagging and contacting the inside of the fixed sleeve of the trolley;

[0020] (4) The support ring assemblies on the outer side of the air duct main body can play a role in fixing and limiting the sliding wheel groups, avoiding relative movement between the sliding wheel groups and the air duct main body and causing wear of the air duct main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the protection device for the air duct of the secondary lining trolley and the cloth hanging trolley in the present invention.

[0022] Figure 2 is a partial structural schematic diagram of the protection device for the air duct of the secondary lining trolley and the cloth hanging trolley in the present invention.

[0023] Figure 3 is Figure 2 a partial enlarged view of part A in

[0024] Figure 4 is a schematic structural diagram of the air duct main body in the present invention.

[0025] Figure 5 is a schematic structural diagram of the protective net in the present invention.

[0026] Figure 6 is Figure 5 a partial enlarged view of part B in

[0027] Figure 7 is a schematic structural diagram of one embodiment of the sleeve in the present invention.

[0028] Figure 8 is a schematic structural diagram of another embodiment of the sleeve in the present invention.

[0029] Figure 9One of the structural schematic diagrams of the support member and the sliding wheel set in the present invention.

[0030] Figure 10 It is Figure 9 The partial enlarged view of the C position in

[0031] Figure 11 It is Figure 9 The partial enlarged view of the D position in

[0032] Figure 12 Another structural schematic diagram of the support member and the sliding wheel set in the present invention.

[0033] Figure 13 It is Figure 12 The partial enlarged view of the E position in Detailed implementation manners

[0034] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully convey the scope of the present invention to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions, and numerical values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0035] The "first", "second", and similar terms used in the present invention do not denote any order, quantity, or importance, but are only used to distinguish different parts. Words such as "comprising" or "including" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements. "Up", "down", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0036] Such as Figures 1 to 7As shown in the figure, a protection device for the air duct of the secondary lining trolley and the cloth hanging trolley includes an air duct main body 1. Along the axial direction of the air duct main body 1, support ring assemblies 11 are evenly arranged on the outside. A sliding wheel set 2 is sleeved on the outside of the support ring assemblies 11. The sliding wheel set 2 is detachably and fixedly installed inside the tunnel. On the top of the air duct main body 1 between two adjacent sliding wheel sets 2, a protective net 4 is arranged. The protective net 4 is fixedly supported between two adjacent sliding wheel sets 2; the protective net 4 has a semi-circular protective net main body 41 that matches the top of the air duct main body 1. At least two protective support rods 42 parallel to the axis of the air duct main body 1 are evenly arranged on the protective net main body 41. At the end of the protective support rod 42, a protective connecting piece 43 is arranged; the sliding wheel set 2 has a pulley support cylinder 21 that is detachably and fixedly sleeved on the outside of the air duct main body 1. Pulleys 22 are evenly arranged on the outside of the pulley support cylinder 21. An insertion seat 23 that matches the protective connecting piece 43 is fixedly arranged on the outside of the pulley support cylinder 21; in this embodiment, support ring assemblies 11 are evenly arranged on the outside of the air duct main body 1. The sliding wheel set 2 is sleeved on the support ring assemblies 11. When the secondary lining trolley and the cloth hanging trolley move through, the sliding wheel set 2 can slide inside the fixed sleeve of the trolley, avoiding contact between the air duct main body 1 and the inner wall of the fixed sleeve of the trolley, so as to avoid direct contact between the trolley and the air duct main body 1 and cause wear of the air duct main body 1; on the top of the air duct main body 1 between two adjacent sliding wheel sets 2, a protective net 4 is arranged. The protective net 4 can play a protective role above the air duct main body 1, avoiding falling objects during construction from directly falling on the top of the air duct main body 1 and causing damage to the air duct main body 1; the protective net 4 is fixedly supported between two adjacent sliding wheel sets 2. Through the fixed support of the protective net 4, the air duct main body 1 between two adjacent sliding wheel sets 2 can be tightened, avoiding the air duct main body 1 from sagging and contacting the inside of the fixed sleeve of the trolley to cause wear; the support ring assemblies 11 on the outside of the air duct main body 1 can play a role in fixing and limiting the sliding wheel set 2, avoiding relative movement between the sliding wheel set 2 and the air duct main body 1 and causing wear of the air duct main body 1.

[0037] In some embodiments, as Figure 3 shown, an insertion hole 231 is opened on the insertion seat 23; as Figure 5 and Figure 6As shown, the protective connecting member 43 has a protective adjusting screw 431 that is threadedly connected to the inner side of the end of the protective support rod 42. Internal threaded holes that match the protective adjusting screw 431 are provided on the inner sides of both ends of the protective support rod 42. The protective adjusting screw 431 is threadedly assembled inside the internal threaded hole. A hexagonal prism 432 is fixedly provided at one end of the protective adjusting screw 431 that faces away from the protective support rod 42. A retaining ring 433 is fixedly provided at one end of the hexagonal prism 432 that faces away from the protective adjusting screw 431. A bolt 434 that matches the insertion hole 231 is fixedly provided on the side of the retaining ring 433 that faces away from the hexagonal prism 432. When installing the protective net 4 between two adjacent sliding wheel sets 2, the protective connecting member 43 is aligned with the insertion seat 23, and the hexagonal prism 432 is clamped and rotated to turn the protective adjusting screw 431. The threaded structure between the protective adjusting screw 431 and the protective support rod 42 cooperates to drive the bolt 434 to move along its axial direction, enabling the bolt 434 to be inserted into the insertion hole 231. The retaining ring 433 abuts against one side of the insertion seat 23, realizing the installation and fixation of the protective net 4 between two adjacent sliding wheel sets 2. With the rotational adjustment of the protective adjusting screw 431, the retaining ring 433 will push the two sliding wheel sets 2 at both ends of the protective net 4 away from each other, thereby tensioning the air duct main body 1 between the two adjacent sliding wheel sets 2 and preventing the air duct main body 1 from bending and sagging under the action of gravity and contacting the inner part of the fixed sleeve of the trolley, causing wear.

[0038] In some embodiments, the support ring assembly 11 has support retaining edges 111 that respectively correspond to both ends of the pulley support cylinder 21. The support retaining edges 111 are fixedly provided on the outer side of the air duct main body 1; as Figure 3As shown in the figure, the pulley support cylinder 21 has an upper arc plate 211 and a lower arc plate 212. One end of the upper arc plate 211 is hinged to one end of the lower arc plate 212, and the other end of the upper arc plate 211 is detachably and fixedly connected to the other end of the lower arc plate 212 through a bolt and nut mechanism; the support retaining edge 111 is a rigid circular ring structure, and the support retaining edge 111 is fixedly bonded to the outside of the air duct main body 1. The support retaining edge 111 can support the air duct main body 1 to ensure the smooth flow of air inside the air duct main body 1. At the same time, the two support retaining edges 111 limit the pulley support cylinder 21 at both ends to prevent relative movement between the sliding wheel set 2 and the air duct main body 1, which may cause wear of the air duct main body 1; further, a buffer rubber pad can be provided between the end of the pulley support cylinder 21 and the support retaining edge 111 to eliminate the installation gap and further prevent relative movement between the sliding wheel set 2 and the air duct main body 1, which may cause wear of the air duct main body 1; more specifically, the cross-section of the support retaining edge 111 is in an "L" shape; a part of the support retaining edge 111 is fixedly sleeved on the outside of the air duct main body 1 to form a support between the pulley support cylinder 21 and the air duct main body 1, and the other part forms a block at the end of the pulley support cylinder 21; the upper arc plate 211 and the lower arc plate 212 in the pulley support cylinder 21 are sleeved on the outside between the two support retaining edges 111. By disassembling the bolt and nut mechanism between one end of the upper arc plate 211 and the lower arc plate 212, the pulley support cylinder 21 can be removed from the air duct main body 1, which is convenient for replacement and maintenance.

[0039] In some embodiments, as Figure 7 shown, a sleeve 3 is slidably sleeved on the outside of the air duct main body 1. The sleeve 3 is fixedly installed on the secondary lining trolley or the cloth hanging trolley. Tapered guide cylinders 31 are fixedly provided at both ends of the sleeve 3. The inner wall of the sleeve 3 is slidably matched with the pulley 22; for some secondary lining trolleys, cloth hanging trolleys or other trolleys without a fixed sleeve, it is necessary to fixedly install the sleeve 3 on the frame of the trolley. By matching the sleeve 3 with the pulley 22 on the outside of the sliding wheel set 2 for sliding, it is possible to avoid contact with the air duct main body 1 when the trolley moves, thereby preventing wear of the air duct main body 1; tapered guide cylinders 31 are fixedly provided at both ends of the sleeve 3. Through the tapered guide cylinders 31, when relative movement occurs between the sleeve 3 and the sliding wheel set 2, the sliding wheel set 2 can be guided into the inside of the sleeve 3, which is beneficial for the sliding wheel set 2 to smoothly enter the inside of the sleeve 3.

[0040] In some embodiments, as a specific installation method of the sleeve 7 on the trolley, as Figure 8As shown, door-shaped brackets 34 are fixedly arranged at the top of both ends of the casing 3. Hanging claws 33 are arranged above both sides of the door-shaped brackets 34. A hanging screw 32 is rotatably arranged at the bottom of one end of the hanging claw 33. A threaded connection seat 35 is threadedly connected to the outside of the hanging screw 32. The threaded connection seat 35 is fixedly arranged on the side of the casing 3. A hanging fixing nut 36 that abuts against the bottom of the threaded connection seat is threadedly assembled on the outside of the hanging screw 32. By rotating the hanging screw 32, the hanging claw 33 can be driven to move up and down. The downward movement of the hanging claw 33 cooperates with the door-shaped bracket 34 to clamp and fix on the top of the gantry of the trolley, thereby realizing the fixed installation of the casing 3 on the trolley. The hanging fixing nut 36 can lock between the hanging screw 32 and the threaded connection seat 35 when the hanging claw 33 and the door-shaped bracket 34 cooperate to clamp and fix on the gantry, avoiding loosening of the hanging screw 32 after installation. The gantry structure of the trolley can refer to the gantry disclosed in the Chinese utility model patent document with the authorization announcement number CN220621896U.

[0041] In some embodiments, as Figure 1 and Figure 2 shown, a support member 5 is arranged below the sliding wheel set 2. The sliding wheel set 2 is detachably and fixedly installed inside the tunnel through the support member 5. As Figures 9 to 13 shown, the support member 5 has an installation base plate 55. A rotation locking assembly 53 is arranged on the top of the installation base plate 55. A lifting adjustment rod 51 is arranged on the rotation locking assembly 53. A connection assembly 54 for detachably and fixedly connecting with the bottom of the sliding wheel set 2 is arranged at the upper end of the lifting adjustment rod 51. The sliding wheel set 2 is detachably and fixedly installed inside the tunnel through the support member 5. When the trolley moves, the support member 5 in front of the moving direction of the trolley will block the movement of the trolley. Therefore, before the trolley moves, it is necessary to fold the support member 5 close to the trolley in its moving direction to reserve space for the trolley to pass through. First, disconnect the connection assembly 54 from the sliding wheel set 2, then release the locking state of the rotation locking assembly 53 on the lifting adjustment rod 51, and then rotate the lifting adjustment rod 51 to one side to lay it down to reduce its height for the trolley to move through. After the trolley moves through, immediately rotate the lifting adjustment rod 51 back to the vertical state, then connect the connection assembly 54 with the sliding wheel set 2 together to restore the support state of the sliding wheel set 2. At the same time, lock the lifting adjustment rod 51 with the rotation locking assembly 53 to keep the lifting adjustment rod 51 in a vertical state and provide stable support for the sliding wheel set 2. The installation base plate 55 can be assembled and fixed on the ground inside the tunnel through expansion bolts.

[0042] In some embodiments, the lifting adjustment rod 51 has an adjustment tube 512. Upper and lower support rods 511 and 513 are respectively threadedly connected to the inner parts of the upper and lower ends of the adjustment tube 512. The outer sides of the lower end of the upper support rod 511 and the upper end of the lower support rod 513 have external threads with opposite spiral directions; a connection assembly 54 is arranged at the upper end of the upper support rod 511, and a rotation locking assembly 53 is arranged at the lower end of the lower support rod 513. By rotating the adjustment tube 512, the adjustment tube 512 is matched with the upper support rod 511 and the lower support rod 513 through a threaded structure, which can drive the upper support rod 511 and the lower support rod 513 to extend or retract from both ends of the adjustment tube 512 respectively, so as to realize the length adjustment of the lifting adjustment rod 51, meet the different height support requirements for the sliding wheel set 2 and the air duct main body 1, and make the sliding wheel set 2, the air duct main body 1 correspond to the sleeve 3.

[0043] In some embodiments, as Figure 9 and Figure 10 shown, the rotation locking assembly 53 has two rotation support discs 531 symmetrically and fixedly arranged on the top of the mounting base plate 55. A rotation seat 532 is rotatably arranged between the two rotation support discs 531. An arc-shaped slideway 518 centered on the rotation axis of the rotation seat 532 is formed on the rotation support disc 531. A card slot 5181 communicated with the lower side of the upper end of the arc-shaped slideway 518 is arranged. The lower end of the lower support rod 513 is fixedly arranged on the top of the rotation seat 532. A sliding tube 514 is slidably arranged on the lower support rod 513. A lifting plate 515 is fixedly arranged on the outer side of the sliding tube 514. A support ring 516 is fixedly arranged on the lower support rod 513 above the sliding tube 514. A support spring 517 is sleeved on the outer side of the lower support rod 513 between the support ring 516 and the sliding tube 514. A bolt 519 matched with the arc-shaped slideway 518 is fixedly arranged on one side of the sliding tube 514; when the lower support rod 513 is perpendicular to the mounting base plate 55, the bolt 519 is snapped into the inside of the card slot 5181 under the elastic force of the support spring 517, so that the lifting adjustment rod 51 maintains a vertical state; when the trolley needs to pass through, the lifting plate 515 is pulled upward, the lifting plate 515 drives the sliding tube 514 to slide upward on the lower support rod 513, the support spring 517 is compressed, the bolt 519 moves out of the inside of the card slot 5181, at this time the bolt 519 can slide along the arc-shaped slideway 518, and the lifting adjustment rod 51 can rotate to one side to reserve space for the trolley to pass through; after the trolley passes through, the lifting adjustment rod 51 is rotated back to the vertical state. When the bolt 519 slides to the card slot 5181 inside the arc-shaped slideway 518, the support spring 517 resets and pushes the bolt 519 into the inside of the card slot 5181, so that the lifting adjustment rod 51 maintains a vertical state.

[0044] In some embodiments, in order to improve the stability of the support for the sliding wheel set 2 and the air duct main body 1, as Figure 9 and Figure 11As shown, a diagonal brace assembly 52 is provided between the lifting adjustment rod 51 and the mounting base plate 55. The diagonal brace assembly 52 has an upper diagonal brace plate 521 and a lower diagonal brace plate 522. The upper end of the upper diagonal brace plate 521 is hinged to one side of the lower support rod 513. The lower end of the upper diagonal brace plate 521 is rotatably connected to the upper part of the lower diagonal brace plate 522 through a hinge shaft 524. The upper end of the lower diagonal brace plate 522 is detachably and fixedly connected to the lower part of the upper diagonal brace plate 521 through a diagonal brace fixing bolt 523. The bottom end of the lower diagonal brace plate 522 is hinged to the top of the mounting base plate 55. When the upper diagonal brace plate 521 and the lower diagonal brace plate 522 are on the same straight line, the diagonal brace fixing bolt 523 can assemble and fix the lower diagonal brace plate 522 and the lower part of the upper diagonal brace plate 521. At this time, the diagonal brace assembly 52, the lower support rod 513, and the mounting base plate 55 form a stable triangular support structure, improving the stability of the lifting adjustment rod 51 and providing stable support for the sliding wheel set 2 and the air duct main body 1. When rotating the lifting adjustment rod 51 to avoid the passage of the trolley, the diagonal brace fixing bolt 523 can be removed, enabling the lower diagonal brace plate 522 and the upper diagonal brace plate 521 to rotate relative to each other and fold with the rotation of the lifting adjustment rod 51, as Figure 1 shown.

[0045] In some embodiments, when rotating or resetting the lifting adjustment rod 51, it is necessary to separate or connect the upper end of the lifting adjustment rod 51 and the sliding wheel set 2. The connection assembly 54 can quickly separate or connect the upper end of the lifting adjustment rod 51 and the sliding wheel set 2; as Figure 12 and Figure 13 shown, the connection assembly 54 has a connection seat 541 fixedly provided at the bottom of the pulley support cylinder 21. A U-shaped connection groove 542 corresponding to the upper end of the upper support rod 511 is formed on the connection seat 541. A transition sliding column 545 matching the U-shaped connection groove 542 is concentrically and fixedly provided at the upper end of the upper support rod 511. A retaining disk 546 is concentrically and fixedly provided at one end of the transition sliding column 545 away from the upper support rod 511. A threaded locking tube 543 is threadedly sleeved on the outer side of the upper end of the upper support rod 511. A locking groove 544 matching the threaded locking tube 543 is formed at the bottom of the connection seat 541. When connecting the upper end of the lifting adjustment rod 51 and the sliding wheel set 2, the transition sliding column 545 slides into the interior of the U-shaped connection groove 542. The threaded locking tube 543 is screwed, so that the upper end of the threaded locking tube 543 is embedded into the interior of the locking groove 544. The threaded locking tube 543 and the retaining disk 546 clamp both sides of the connection seat 541 at the locking groove 544, realizing the fixed connection between the upper end of the lifting adjustment rod 51 and the sliding wheel set 2. When separating the upper end of the lifting adjustment rod 51 and the sliding wheel set 2, the threaded locking tube 543 is screwed downward, and the upper end of the threaded locking tube 543 is disengaged from the interior of the locking groove 544. At this time, the transition sliding column 545 can slide out of the interior of the U-shaped connection groove 542, realizing the separation between the upper end of the lifting adjustment rod 51 and the sliding wheel set 2.

[0046] In some embodiments, at least four pulleys 22 are circumferentially arrayed at both ends of the pulley support cylinder 21; preferably, eight pulleys 22 are circumferentially arrayed at both ends of the pulley support cylinder 21.

[0047] Thus far, the embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0048] The above-described embodiments merely represent some implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A protective device for the air duct of the secondary lining trolley and the cloth hanging trolley, characterized in that: It comprises an air duct body, the outer side of the air duct body is evenly provided with support ring components along the axial direction thereof, the outer side of the support ring component is sleeved with a sliding wheel group, the sliding wheel group is detachably fixedly mounted inside the tunnel, and a protective net is provided on the top of the air duct body between two adjacent sliding wheel groups, and the protective net is fixedly supported between the two adjacent sliding wheel groups; The protection net has a semicircular arc-shaped protection net body that matches the top of the air duct body, and at least two protection support rods parallel to the axis of the air duct body are evenly arranged on the protection net body, and the ends of the protection support rods are provided with protection connectors; The sliding wheel group comprises a pulley support tube which is detachably fixedly sleeved on the outside of the air duct body, pulleys are evenly arranged on the outside of the pulley support tube, and a plug-in seat matching the protective connector is fixedly arranged on the outside of the pulley support tube; The insertion seat is provided with an insertion hole; The protective connecting piece has a protective adjustment screw threadedly connected to the inner side of the end of the protective support rod, a hexagonal prism is fixedly provided on the end of the protective adjustment screw facing away from the protective support rod, a retaining ring is fixedly provided on the end of the hexagonal prism facing away from the protective adjustment screw, and a plug matching the insertion hole is fixedly provided on the side of the retaining ring facing away from the hexagonal prism.

2. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 1 is characterized in that: The support ring assembly has support baffles corresponding to the two ends of the pulley support tube respectively, and the support baffles are fixedly arranged on the outside of the air duct body; the pulley support tube has an upper arc plate and a lower arc plate, one end of the upper arc plate is hinged to one end of the lower arc plate, and the other end of the upper arc plate is detachably fixedly connected to the other end of the lower arc plate by a bolt and nut mechanism.

3. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 1 is characterized in that: The outer sliding sleeve of the air duct body is provided with a sleeve, and the sleeve is fixedly installed on the secondary lining trolley or the cloth hanging trolley. Both ends of the sleeve are fixedly provided with a tapered guide cylinder, and the inner wall of the sleeve is slidably matched with the pulley.

4. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 3 is characterized in that: Door-shaped stop frames are fixedly provided on the top of both ends of the sleeve, and hanging claws are provided on the upper sides of the door-shaped stop frames. A hanging screw is rotatably provided on the bottom of one end of the hanging claw, and the outer side of the hanging screw is threadedly connected to a threaded connection seat, and the threaded connection seat is fixedly provided on the side of the sleeve, and the outer side of the hanging screw is threadedly equipped with a hanging fixing nut that abuts against the bottom of the threaded connection seat.

5. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 1 is characterized in that: A support member is provided below the sliding wheel group, and the sliding wheel group is detachably fixedly mounted inside the tunnel through the support member; The support member has a mounting base plate, a rotation locking assembly is arranged on the top of the mounting base plate, a lifting adjustment rod is arranged on the rotation locking assembly, and a connecting assembly for detachably fixedly connecting with the bottom of the sliding wheel group is arranged on the upper end of the lifting adjustment rod.

6. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 5 is characterized in that: The lifting adjustment rod has an adjustment tube, and the upper and lower ends of the adjustment tube are respectively threadedly connected with an upper support rod and a lower support rod, and the outer side of the lower end of the upper support rod and the outer side of the upper end of the lower support rod have external threads with opposite spiral directions; The connecting assembly is arranged at the upper end of the upper support rod, and the rotation locking assembly is arranged at the lower end of the lower support rod.

7. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 6 is characterized in that: The locking plate is fixedly mounted on the top of the locking plate, and a support spring is mounted on the outer side of the locking plate to lock the locking plate. The locking plate is configured to lock the locking plate so that the locking plate is in a state of being lifted up and sliding relative to the locking plate.

8. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 6 is characterized in that: A diagonal brace assembly is arranged between the lifting adjustment rod and the mounting base plate, and the diagonal brace assembly comprises an upper diagonal brace plate and a lower diagonal brace plate, the upper end of the upper diagonal brace plate is hinged to one side of the lower support rod, the lower end of the upper diagonal brace plate is rotatably connected to the upper part of the lower diagonal brace plate via a hinge shaft, the upper end of the lower diagonal brace plate is detachably fixedly connected to the lower part of the upper diagonal brace plate via a diagonal brace fixing bolt, and the bottom end of the lower diagonal brace plate is hinged to the top of the mounting base plate.

9. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 6, characterized in that: The connecting assembly comprises a connecting seat fixedly arranged at the bottom of the pulley support tube, the connecting seat is provided with a U-shaped connecting groove corresponding to the upper end of the upper support rod, the upper end of the upper support rod is concentrically fixed with a transition slide column matching the U-shaped connecting groove, the end of the transition slide column facing away from the upper support rod is concentrically fixed with a baffle, the outer side of the upper end of the upper support rod is threadedly sleeved with a threaded locking tube, and the bottom of the connecting seat is provided with a locking groove matching the threaded locking tube.

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