Protection device for air pipes of secondary lining trolley and cloth hanging trolley

Abstract

The invention provides a protection device for an air pipe of a secondary lining trolley and a cloth hanging trolley, which comprises an air pipe main body, supporting ring assemblies are uniformly arranged on the outer side of the air pipe main body along the axial direction of the air pipe main body, the outer sides of the supporting ring assemblies are sleeved with sliding wheel sets, and the sliding wheel sets are detachably and fixedly erected in a tunnel. A protective net is arranged at the position, between every two adjacent sliding wheel sets, of the top of the air pipe body, and the protective net is fixedly supported between every two adjacent sliding wheel sets. According to the air pipe, the supporting ring assemblies are evenly arranged on the outer side of the air pipe body, the supporting ring assemblies are sleeved with the sliding wheel sets, when the secondary lining trolley and the cloth hanging trolley move and pass through, the sliding wheel sets can slide in the fixing sleeves of the trolleys, and the situation that the air pipe body makes contact with the inner walls of the fixing sleeves of the trolleys is avoided; therefore, abrasion of the air pipe main body caused by direct contact between the trolley and the air pipe main body can be avoided.

Description

Technical Field

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

[0002] During tunnel construction, air ducts are usually used 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, leading to problems such as air duct falling off and air leakage, which affects the construction progress and construction environment.

[0003] In the prior art, for example, Chinese utility model patent document with authorization announcement number CN213953650U discloses a device for protecting the wind tube of the tunnel face, and Chinese utility model patent document with 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, and other problems; 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 ducts of the second lining trolley and the cloth hanging trolley, which can avoid direct contact with the air ducts and cause wear when the second lining trolley and the cloth hanging trolley move through, and at the same time prevent falling objects from damaging the air ducts during construction to solve the current technical problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a protective device for the air ducts of the secondary lining trolley and the cloth hanging trolley, which can avoid wear and tear caused by direct contact with the air ducts when the secondary lining trolley and the cloth hanging trolley move through, and can also prevent falling objects from damaging the air ducts during construction.

[0006] The technical solution of the present invention is as follows: a protective device for the air duct of a secondary lining trolley and a cloth hanging trolley comprises an air duct main body, a support ring assembly is evenly arranged on the outer side of the air duct main body along its axial direction, a sliding wheel group is sleeved on the outer side of the support ring assembly, the sliding wheel group is detachably fixedly mounted 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 semicircular arc-shaped protective net main body matching 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 evenly arranged on the protective net main body, and protective connecting pieces are arranged at the ends of the protective support rods; the sliding wheel group has a pulley support tube detachably fixedly sleeved on the outer side of the air duct main body, pulleys are evenly arranged on the outer side of the pulley support tube, and a plug-in seat matching the protective connecting piece is fixedly arranged on the outer side of the pulley support tube.

[0007] An insertion hole is provided on the insertion seat; the protective connecting piece has a protective adjusting 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 adjusting screw away from the protective support rod, a retaining ring is fixedly provided on the end of the hexagonal prism away from the protective adjusting screw, and a plug matching the insertion hole is fixedly provided on the side of the retaining ring away from the hexagonal prism.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] A support member is arranged 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, and a rotation locking assembly is arranged on the top of the mounting base plate, and a lifting and lowering adjustment rod is arranged on the rotation locking assembly, and a connecting assembly for detachably and fixedly connecting with the bottom of the sliding wheel group is arranged on the upper end of the lifting and lowering adjustment rod.

[0012] 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 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 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.

[0014] 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.

[0015] 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.

[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 body, and a sliding wheel assembly is mounted on the support ring assembly. When the secondary lining trolley and the cloth hanging trolley move through, the sliding wheel assembly can slide inside the fixed sleeve of the trolley to avoid the air duct body from contacting the inner wall of the fixed sleeve of the trolley, thereby avoiding direct contact between the trolley and the air duct body and causing wear of the air duct body;

[0018] (2) A protective net is provided on the top of the air duct body between two adjacent sliding wheel groups, and the protective net can play a protective role above the air duct body to prevent falling objects during construction from directly falling on the top of the air duct body and causing damage to the air duct 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 body between the two adjacent sliding wheel groups can be tensioned to prevent the air duct body from falling and contacting with the inside of the fixed sleeve of the trolley to cause wear;

[0020] (4) The support ring assembly on the outside of the air duct body can play a role in fixing and limiting the sliding wheel assembly, thereby preventing the sliding wheel assembly and the air duct body from relative movement and causing wear on the air duct body. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

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

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

[0026] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0027] Figure 7 It is a schematic structural diagram of an implementation mode of the sleeve in the present invention.

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

[0029] Fig. 9This is one of the structural schematic diagrams of the support member and the sliding wheel group in the present invention.

[0030] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle.

[0031] Fig.11 for Fig. 9 A partial enlarged view of point D in the middle.

[0032] Fig.12 This is the second structural schematic diagram of the support member and the sliding wheel group in the present invention.

[0033] Fig.13 for Fig.12 A partial enlarged view of point E in the middle. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit 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 express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0035] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] like Figures 1 to 7As shown, the protective device for the air duct of the secondary lining trolley and the cloth hanging trolley comprises an air duct body 1, the outer side of the air duct body 1 is evenly provided with a support ring assembly 11 along its axial direction, the outer side of the support ring assembly 11 is sleeved with a sliding wheel group 2, the sliding wheel group 2 is detachably fixedly mounted inside the tunnel, and a protective net 4 is provided on the top of the air duct body 1 between two adjacent sliding wheel groups 2, and the protective net 4 is fixedly supported between the two adjacent sliding wheel groups 2; the protective net 4 has a semicircular arc-shaped protective net matching the top of the air duct body 1 The main body 41, the protective net main body 41 is evenly provided with at least two protective support rods 42 parallel to the axis of the air duct main body 1, and the ends of the protective support rods 42 are provided with protective connectors 43; the sliding wheel group 2 has a pulley support tube 21 that is detachably fixedly mounted on the outside of the air duct main body 1, and the pulley 22 is evenly provided on the outside of the pulley support tube 21, and a plug-in seat 23 matching the protective connector 43 is fixedly provided on the outside of the pulley support tube 21; in this embodiment, the outside of the air duct main body 1 is evenly provided with a support ring assembly 11 The support ring assembly 11 is provided with a sliding wheel group 2. When the second lining trolley and the cloth hanging trolley move through, the sliding wheel group 2 can slide inside the fixed sleeve of the trolley to avoid the contact between the air duct main body 1 and the inner wall of the fixed sleeve of the trolley, thereby avoiding direct contact between the trolley and the air duct main body 1 and causing wear of the air duct main body 1; a protective net 4 is provided on the top of the air duct main body 1 between two adjacent sliding wheel groups 2, and the protective net 4 can play a protective role above the air duct main body 1 to avoid falling objects directly falling on the top of the air duct main body 1 during the construction process and causing damage to the air duct main body 1; the protective net 4 is fixedly supported between two adjacent sliding wheel groups 2, and the fixed support of the protective net 4 can make the air duct main body 1 between the two adjacent sliding wheel groups 2 be tightened to avoid the air duct main body 1 from falling and contacting with the inside of the fixed sleeve of the trolley to cause wear; the support ring assembly 11 on the outside of the duct main body 1 can play a role of fixing and limiting the sliding wheel group 2 to avoid relative movement between the sliding wheel group 2 and the duct main body 1 and causing wear of the duct main body 1.

[0037] In some embodiments, Figure 3 As shown, the insertion seat 23 is provided with an insertion hole 231; Figure 5 and Figure 6As shown, the protective connecting piece 43 has a protective adjusting screw 431 which is threadedly connected to the inner side of the end of the protective support rod 42. The inner sides of both ends of the protective support rod 42 are provided with internal threaded holes matching the protective adjusting screw 431. The protective adjusting screw 431 is threadedly assembled inside the internal threaded holes. A hexagonal prism 432 is fixedly provided on the end of the protective adjusting screw 431 away from the protective support rod 42. A retaining ring 433 is fixedly provided on the end of the hexagonal prism 432 away from the protective adjusting screw 431. A plug 434 matching the insertion hole 231 is fixedly provided on the side of the retaining ring 433 away from the hexagonal prism 432. When the protective net 4 is installed between two adjacent sliding wheel groups 2, the protective connecting piece 43 is connected to the protective net 43. Corresponding to the insertion seat 23, the hexagonal prism 432 is clamped to rotate the protective adjustment screw 431, and the threaded structure between the protective adjustment screw 431 and the protective support rod 42 cooperates to drive the plug 434 to move along its axial direction, so that the plug 434 can be inserted into the interior of the insertion hole 231, and the retaining ring 433 is against one side of the insertion seat 23, thereby realizing the installation and fixation of the protective net 4 between the two adjacent sliding wheel groups 2; with the rotation and adjustment of the protective adjustment screw 431, the retaining ring 433 will push the two sliding wheel groups 2 at both ends of the protective net 4 away from each other, thereby tightening the air duct body 1 between the two adjacent sliding wheel groups 2, to prevent the air duct body 1 from bending and falling under the action of gravity and contacting with the inside of the fixing sleeve of the trolley to cause wear.

[0038] In some embodiments, the support ring assembly 11 has support edges 111 corresponding to the two ends of the pulley support tube 21, and the support edges 111 are fixedly arranged on the outside of the air duct body 1; Figure 3As shown, the pulley support tube 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 fixedly connected to the other end of the lower arc plate 212 by a bolt and nut mechanism; the support baffle 111 is a rigid circular ring structure, and the support baffle 111 is fixedly bonded to the outer side of the wind duct body 1, and the support baffle 111 can support the wind duct body 1 to ensure smooth flow of air inside the wind duct body 1, and at the same time, the two support baffles 111 limit the pulley support tube 21 at both ends to avoid relative movement between the sliding wheel group 2 and the wind duct body 1 and cause wear of the wind duct body 1; further, at the end of the pulley support tube 21 and the support baffle, A buffer rubber pad can be arranged between 111 to eliminate the installation gap and further avoid the relative movement between the sliding wheel group 2 and the wind duct body 1, which may cause wear of the wind duct body 1; more specifically, the cross-section of the support stop edge 111 is in an "L" shape; a part of the support stop edge 111 is fixedly mounted on the outside of the wind duct body 1 to form a support between the pulley support tube 21 and the wind duct body 1, and the other part forms a block at the end of the pulley support tube 21; the upper arc plate 211 and the lower arc plate 212 in the pulley support tube 21 are mounted on the outside between the two support stops 111, and the bolt and nut mechanism between one end of the upper arc plate 211 and the lower arc plate 212 can be disassembled to remove the pulley support tube 21 from the wind duct body 1, so as to facilitate replacement and maintenance.

[0039] In some embodiments, Figure 7 As shown, the outer sliding sleeve of the air duct body 1 is provided with a sleeve 3, and the sleeve 3 is fixedly installed on the second lining trolley or the cloth hanging trolley. Both ends of the sleeve 3 are fixedly provided with a tapered guide cylinder 31, and the inner wall of the sleeve 3 slides with the pulley 22; for some second lining trolleys, cloth hanging trolleys or other trolleys that do not have a fixed sleeve, it is necessary to fix the sleeve 3 on the frame of the trolley, and the sleeve 3 slides with the pulley 22 on the outer side of the sliding wheel group 2, so that the sleeve 3 can avoid contact with the air duct body 1 when the trolley moves, thereby avoiding wear on the air duct body 1; both ends of the sleeve 3 are fixedly provided with a tapered guide cylinder 31, and through the tapered guide cylinder 31, when relative movement occurs between the sleeve 3 and the sliding wheel group 2, the sliding wheel group 2 can be introduced into the interior of the sleeve 3, which is conducive to the smooth entry of the sliding wheel group 2 into the interior of the sleeve 3.

[0040] In some embodiments, as a specific installation method for installing the sleeve 7 on the trolley, such as Figure 8As shown, door-shaped stoppers 34 are fixedly provided at the tops of both ends of the sleeve 3, and hanging claws 33 are provided on the upper sides of both sides of the door-shaped stoppers 34. A hanging screw 32 is rotatably provided at the bottom of one end of the hanging claw 33. The outer side of the hanging screw 32 is threadedly connected to a threaded connection seat 35. The threaded connection seat 35 is fixedly provided on the side of the sleeve 3. The outer side of the hanging screw 32 is threadedly equipped with a hanging fixing nut 36 that abuts against the bottom of the threaded connection seat. The hanging claw 33 can be driven to move up and down by rotating the hanging screw 32. The claw 33 moves downward to cooperate with the door-shaped stop frame 34, and can be clamped and fixed on the top of the door frame of the trolley, thereby realizing the fixed installation of the sleeve 3 on the trolley; the hanging fixing nut 36 can lock the hanging screw 32 and the threaded connection seat 35 when the hanging claw 33 and the door-shaped stop frame 34 are clamped and fixed on the door frame, so as to prevent the hanging screw 32 from loosening after installation; the door frame structure of the trolley can refer to the door frame disclosed in the Chinese utility model patent document with authorization announcement number CN220621896U.

[0041] In some embodiments, Figure 1 and Figure 2 As shown, a support member 5 is provided below the sliding wheel group 2, and the sliding wheel group 2 is detachably fixedly mounted inside the tunnel through the support member 5; Figures 9 to 13 As shown, the support member 5 has a mounting base plate 55, a rotation locking assembly 53 is arranged on the top of the mounting base plate 55, a lifting and lowering adjustment rod 51 is arranged on the rotation locking assembly 53, and a connecting assembly 54 for detachably fixedly connected to the bottom of the sliding wheel group 2 is arranged on the upper end of the lifting and lowering adjustment rod 51; the sliding wheel group 2 is detachably fixedly mounted 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, the support member 5 close to the trolley in its moving direction needs to be folded to reserve space for the trolley to pass through; first, the connecting assembly 54 is separated from the sliding wheel group 2, and then Release the locking state of the lifting and adjusting rod 51 by the rotating locking assembly 53, then rotate the lifting and adjusting rod 51 to one side and lay it down to lower its height so that it can move through with the trolley. After the trolley moves through, immediately rotate the lifting and adjusting rod 51 to reset it to a vertical state, and then connect the connecting assembly 54 to the sliding wheel group 2 to restore the supporting state of the sliding wheel group 2. At the same time, lock the lifting and adjusting rod 51 with it by rotating the locking assembly 53, so that the lifting and adjusting rod 51 remains in a vertical state, providing stable support for the sliding wheel group 2; the mounting base plate 55 can be fixed to the ground in the tunnel by means of expansion bolts.

[0042] In some embodiments, the lifting adjustment rod 51 has an adjustment tube 512, and the upper and lower ends of the adjustment tube 512 are respectively threadedly connected with an upper support rod 511 and a lower support rod 513, and the outer side of the lower end of the upper support rod 511 and the outer side of the upper end of the lower support rod 513 have external threads with opposite spiral directions; the connecting component 54 is arranged at the upper end of the upper support rod 511, and the rotation locking component 53 is arranged at the lower end of the lower support rod 513. By rotating the adjustment tube 512, the adjustment tube 512 cooperates with the upper support rod 511 and the lower support rod 513 through the threaded structure, which can drive the upper support rod 511 and the lower support rod 513 to extend or retract from the two ends of the adjustment tube 512 respectively, thereby realizing the length adjustment of the lifting adjustment rod 51, meeting the different height support requirements of the sliding wheel group 2 and the wind tube main body 1, and making the sliding wheel group 2, the wind tube main body 1 and the sleeve 3 correspond.

[0043] In some embodiments, Fig. 9 and Fig.10 As shown, the rotation locking assembly 53 has two rotation support plates 531 symmetrically fixedly arranged on the top of the mounting base plate 55, a rotation seat 532 is rotatably arranged between the two rotation support plates 531, an arc-shaped slideway 518 with the rotation axis of the rotation seat 532 as the center is opened on the rotation support plate 531, and a clamping groove 5181 connected thereto is arranged on the lower side of the upper end of the arc-shaped slideway 518, 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 supporting ring 516 is fixedly arranged on the lower support rod 513 above the sliding tube 514, a supporting spring 517 is sleeved on the outer side of the lower support rod 513 between the supporting ring 516 and the sliding tube 514, and a clamping bolt 518 matching 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 55, the latch 519 is inserted into the slot 5181 under the elastic force of the support spring 517, so that the lifting and adjusting rod 51 remains in a vertical state; when the trolley needs to pass, the lifting plate 515 is pulled upward, and the lifting plate 515 drives the sliding tube 514 to slide upward outside the lower support rod 513, the support spring 517 is compressed, and the latch 519 moves out from the slot 5181. At this time, the latch 519 can slide along the arc slide 518, and the lifting and adjusting rod 51 can rotate to one side to reserve space for the passage of the trolley; after the trolley passes, the lifting and adjusting rod 51 is rotated and reset to a vertical state, and when the latch 519 slides to the slot 5181 inside the arc slide 518, the support spring 517 is reset, and the latch 519 is pushed to the inside of the slot 5181, so that the lifting and adjusting rod 51 remains in a vertical state.

[0044] In some embodiments, in order to improve the stability of the support of the sliding wheel group 2 and the wind tube body 1, as Fig. 9 and Fig.11As shown, an oblique support assembly 52 is provided between the lifting adjustment rod 51 and the mounting base plate 55, and the oblique support assembly 52 has an upper oblique support plate 521 and a lower oblique support plate 522. The upper end of the upper oblique support plate 521 is hinged to one side of the lower support rod 513, and the lower end of the upper oblique support plate 521 is rotatably connected to the upper part of the lower oblique support plate 522 through a hinge shaft 524. The upper end of the lower oblique support plate 522 is detachably fixedly connected to the lower part of the upper oblique support plate 521 through an oblique support fixing bolt 523, and the bottom end of the lower oblique support plate 522 is hinged to the top of the mounting base plate 55; the upper oblique support plate 521 and the lower oblique support plate 522 are located at the same When the lifting and lowering adjustment rod 51 is in a straight line, the diagonal support fixing bolts 523 can assemble and fix the lower diagonal support plate 522 and the lower part of the upper diagonal support plate 521. At this time, the diagonal support assembly 52, the lower support rod 513, and the mounting base 55 form a stable triangular support structure, which improves the stability of the lifting and lowering adjustment rod 51 and can provide stable support for the sliding wheel group 2 and the wind tube body 1. When the lifting and lowering adjustment rod 51 is rotated to avoid the passage of the trolley, the diagonal support fixing bolts 523 can be removed, so that the lower diagonal support plate 522 and the upper diagonal support plate 521 can rotate relative to each other, and can be folded with the rotation of the lifting and lowering adjustment rod 51. Figure 1 shown.

[0045] In some embodiments, when the lifting and adjusting rod 51 is rotated or reset, it is necessary to separate or connect the upper end of the lifting and adjusting rod 51 with the sliding wheel group 2, and the connecting component 54 can quickly separate or connect the upper end of the lifting and adjusting rod 51 with the sliding wheel group 2; Fig.12 and Fig.13 As shown, the connecting assembly 54 has a connecting seat 541 fixedly arranged at the bottom of the pulley support tube 21, and a U-shaped connecting groove 542 corresponding to the upper end of the upper support rod 511 is provided on the connecting seat 541. A transition slide column 545 matching the U-shaped connecting groove 542 is fixedly arranged concentrically on the upper end of the upper support rod 511, and a baffle 546 is fixedly arranged concentrically on the end of the transition slide 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, and a locking groove 544 matching the threaded locking tube 543 is provided at the bottom of the connecting seat 541; when the upper end of the lifting and lowering adjustment rod 51 is connected to the sliding wheel group 2, the transition slide column 545 slides The locking member 543 is inserted into the U-shaped connecting groove 542, and the threaded locking tube 543 is screwed so that the upper end of the threaded locking tube 543 is embedded in the locking groove 544. The threaded locking tube 543 and the baffle 546 are clamped on both sides of the connecting seat 541 at the locking groove 544, thereby realizing the fixed connection between the upper end of the lifting and adjusting rod 51 and the sliding wheel group 2. When the upper end of the lifting and adjusting rod 51 is separated from the sliding wheel group 2, the threaded locking tube 543 is screwed downward, and the upper end of the threaded locking tube 543 is disengaged from the locking groove 544. At this time, the transition sliding column 545 can slide outward from the inside of the U-shaped connecting groove 542, thereby realizing the separation between the upper end of the lifting and adjusting rod 51 and the sliding wheel group 2.

[0046] In some embodiments, at least four pulleys 22 are arranged in a circular array at both ends of the pulley support tube 21; preferably, at least eight pulleys 22 are arranged in a circular array at both ends of the pulley support tube 21.

[0047] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0048] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached 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 has a pulley support tube which is detachably fixedly mounted 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 connecting piece is fixedly arranged on the outside of the pulley support tube.

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 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.

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 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.

4. 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.

5. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 4 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.

6. 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.

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 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.

8. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 7 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.

9. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 7, 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.

10. The protective device for the air duct of the secondary lining trolley and the cloth hanging trolley according to claim 7, 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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