A kind of corner excavation equipment for city gate tunnel

Abstract

The present invention relates to a corner excavation equipment for a city gate tunnel, comprising a main beam and a sliding sleeve, wherein the main beam extends in a front-to-back direction, the sliding sleeve is slidably assembled on the main beam in the front-to-back direction, a support body is provided on the main beam outside the sliding stroke of the sliding sleeve, and a support shoe is provided on the support body; a knife arm is provided on the left and right sides of the sliding sleeve respectively, a wheel cutter disc is connected to the lower part of the knife arm, a vertical telescopic cylinder for driving the knife arm to move in the up-down direction is provided between the upper part of the knife arm and the sliding sleeve, a vertical guide structure is provided on the sliding sleeve, and the vertical guide structure is used to guide the knife arm to move in the up-down direction and limit the knife arm in the front-to-back direction; a driving cylinder for driving the sliding sleeve to slide on the main beam is provided between the support body and the knife arm or the sliding sleeve. During cutting, the reaction force of the rock to be cut will be transmitted to the vertical guide sleeve after acting on the wheel cutter disc, and will not transmit the force to the vertical telescopic cylinder, thereby improving the service life of the vertical telescopic cylinder.

Description

Technical Field

[0001] The invention relates to a tunnel boring machine, in particular to a gate-shaped tunnel corner excavation device of the tunnel boring machine. Background Art

[0002] Special-shaped tunnels are tunnels that are different from circular shapes, such as city gates, rectangles, and horseshoes. This type of tunnel is extremely widely used, mainly in defense, energy, transportation, water conservancy and other projects. Compared with circular tunnels, the space utilization rate is increased by 15-20%, taking into account both structural stress and space utilization.

[0003] In the field of city gate tunnel hard rock tunnel construction equipment, the excavation of corners is carried out by using a wheeled cutterhead mounted behind the circular section main machine. While the main machine at the front excavates the circular section, the wheeled cutterhead at the rear excavates the corners on both sides of the lower part of the circle, and the two fit together to form a city gate tunnel.

[0004] A Chinese patent application with application publication number CN113586073A discloses a continuous excavation device, including a rear main beam and a slide box which are arranged inside and outside. The rear main beam extends in the front-to-back direction, the slide box is arranged outside the rear main beam and can move in the front-to-back direction relative to the rear main beam, and excavation mechanisms are provided on both sides of the slide box; the excavation mechanism includes a support arm and a wheel cutter disc, the wheel cutter disc is connected to the support arm through a cutter disc shaft, and slideways are provided on both sides of the lower part of the slide box, the slideways extend in the front-to-back direction, a sliding block is slidably mounted in the slideways, the support arm is connected to the sliding block through a pin shaft, and the support arm can rotate around the pin shaft. The excavation mechanism also includes a thrust cylinder and a swing cylinder. One end of the thrust cylinder is hinged to the slider, and the other end of the thrust cylinder is hinged to the slide box. The thrust cylinder can move the slider in the front-rear direction, so that the support arm and the wheel cutter disc move in the front-rear direction synchronously with the slider; one end of the swing cylinder is hinged to the slider, and the other end of the swing cylinder is connected to the support arm. The swing cylinder can rotate the support arm around the pin shaft, so that the wheel cutter disc rotates around the pin shaft.

[0005] The above-mentioned swing cylinder locks the wheel cutter disc after adjusting it into position, so that the swing cylinder, slider, support arm and wheel cutter disc form a fixed whole. In the process of cutting the corners of the tunnel, the rock to be cut will exert an alternating reaction force on the wheel cutter disc, thereby causing the swing cylinder to be subjected to an alternating force. The alternating force can easily cause damage to the swing cylinder and affect the normal excavation of the equipment. Summary of the invention

[0006] The purpose of the present invention is to provide a tunnel corner excavation device in the form of a city gate, so as to solve the technical problem that in the process of cutting the tunnel corners in the continuous excavation device in the prior art, the rock to be cut will apply an alternating reaction force to the wheel cutter head, thereby causing the swing cylinder to be subjected to an alternating force, which can easily cause damage to the swing cylinder.

[0007] To achieve the above-mentioned purpose, the technical solution of the corner excavation equipment of the city gate tunnel of the present invention is:

[0008] The corner excavation equipment of a city gate tunnel comprises a main beam and a sliding sleeve, wherein the main beam extends in the front-rear direction, the sliding sleeve is slidably assembled on the main beam in the front-rear direction, a support body is provided on the main beam outside the sliding stroke of the sliding sleeve, and a support shoe is provided on the support body; knife arms are provided on the left and right sides of the sliding sleeve respectively, a wheel cutter disc is connected to the lower part of the knife arm, a vertical telescopic cylinder for driving the knife arm to move in the up-down direction is provided between the upper part of the knife arm and the sliding sleeve, a vertical guide structure is provided on the sliding sleeve, and the vertical guide structure is used to guide the knife arm to move in the up-down direction and limit the knife arm in the front-rear direction; a driving cylinder for driving the sliding sleeve to slide on the main beam is provided between the support body and the knife arm or the sliding sleeve.

[0009] The beneficial effect is that the gate-shaped tunnel corner excavation equipment of the present invention has a cutter arm that moves in the up-down direction and is limited by the vertical guide sleeve in the front-back direction. When cutting, the horizontal reaction force generated by the rock to be cut will be transmitted to the vertical guide sleeve after acting on the wheel cutter head, and will not transmit the force to the vertical telescopic cylinder, thereby improving the service life of the vertical telescopic cylinder. In addition, compared with the prior art, if both the vertical telescopic cylinder and the horizontal telescopic cylinder fail, the wheel cutter head will not swing backward and upward under the reaction force of the rock to be cut, thereby ensuring the safety of the staff.

[0010] As a further improvement, the vertical guide structure is a vertical guide sleeve, the upper part of the knife arm is guided and slidably assembled in the vertical guide sleeve in the up and down directions, and the vertical telescopic cylinder is located in the vertical guide sleeve.

[0011] The beneficial effect is that since the vertical telescopic cylinder is located in the vertical guide sleeve, the overall structure is relatively compact while the guidance of the tool setting arm is ensured.

[0012] As a further improvement, a vertical locking piece is provided between the upper portion of the knife arm and the vertical guide sleeve, and the vertical locking piece is used to lock the upper portion of the knife arm and the vertical guide sleeve together after the upper portion of the knife arm slides into place.

[0013] The beneficial effect is: with this design, the vertical telescopic cylinder is only used to adjust the upper and lower positions of the wheel cutter disc and the cutter arm. The vertical reaction force received by the wheel cutter disc during operation is mainly borne by the vertical locking member, while the vertical telescopic cylinder is subjected to a smaller reaction force or even no reaction force, thereby preventing the vertical telescopic cylinder from being damaged by a large force.

[0014] As a further improvement, the vertical locking piece is a locking pin shaft, a first locking hole is provided on the vertical guide sleeve, a second locking hole is provided on the upper part of the knife arm, and at least two first locking holes and / or second locking holes are arranged at intervals in the up and down directions. The locking pin shaft is inserted into the corresponding first locking hole and second locking hole to lock the upper part of the knife arm and the vertical guide sleeve together.

[0015] As a further improvement, each knife arm corresponds to at least two vertical telescopic cylinders, and the vertical telescopic cylinders corresponding to the same knife arm are arranged at intervals in the front-to-back direction.

[0016] The beneficial effect is that such a design improves the stability of the cutter arm when it moves up and down, thereby improving the stability of the wheel cutter disc when it moves up and down.

[0017] As a further improvement, there are two vertical guide sleeves arranged at intervals along the front-to-back direction, the upper part of the knife arm is a fork arm structure, the fork arm structure includes two vertical insert arms arranged at intervals along the front-to-back direction, the vertical insert arms correspond one-to-one to the vertical guide sleeves and are guided and slidably assembled in the vertical guide sleeves.

[0018] The beneficial effect is that by designing the upper part of the knife arm into a fork arm structure, the weight of the knife arm can be reduced, thereby facilitating the vertical telescopic cylinder to drive the wheel-type knife disc to move up and down.

[0019] As a further improvement, the sliding sleeve includes a sleeve body and two movable frames arranged on the left and right sides of the sleeve body, a transverse telescopic cylinder for driving the movable frame to move in the left and right directions is provided between the sleeve body and the corresponding movable frame, and a transverse guide structure for guiding the movable frame to move in the left and right directions is provided on the sleeve body, wherein the vertical guide structure is arranged on the movable frame.

[0020] The beneficial effect is that such a design can adjust the excavation depth of the wheel cutter head up and down and left and right according to the diameter of the excavated tunnel by adjusting the horizontal telescopic cylinder and the vertical telescopic cylinder to meet the excavation requirements of different cross-sectional sizes.

[0021] As a further improvement, the transverse guide structure is a transverse outer sleeve, and a transverse inner sleeve is provided on the movable frame. The transverse inner sleeve is slidably assembled in the transverse outer sleeve in the left and right directions, and the transverse telescopic cylinder is located in the transverse inner sleeve.

[0022] The beneficial effect is that since the transverse telescopic cylinder is located in the transverse inner sleeve, the overall structure is made more compact while the guidance of the movable frame is ensured.

[0023] As a further improvement, a transverse locking piece is provided between the transverse outer sleeve and the transverse inner sleeve, and the transverse locking piece is used to lock the transverse inner sleeve and the transverse outer sleeve together after the transverse inner sleeve slides into place.

[0024] The beneficial effect is: with this design, the transverse telescopic cylinder is only used to adjust the left and right position of the transverse inner sleeve. The horizontal reaction force received by the wheel cutter disc when working is borne by the transverse locking piece, while the reaction force received by the transverse telescopic cylinder is smaller or even not received, thereby avoiding damage to the transverse telescopic cylinder due to a large force.

[0025] As a further improvement, the above-mentioned transverse telescopic cylinders are provided on both upper and lower sides of the left and right sides of the sleeve body.

[0026] The beneficial effect is that such a design ensures the stability of the movable frame moving in the left and right directions, thereby ensuring the stability of the wheel cutter disc moving in the left and right directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the corner excavation equipment of the city gate tunnel type tunnel of the present invention;

[0028] Figure 2 for Figure 1 Left side view of the middle sliding sleeve;

[0029] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0030] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0031] In the figure: 11, front support body; 12, upper support shoe; 13, front protective cover; 14, vertical telescopic cylinder; 15, movable frame; 16, rear protective cover; 17, rear support body; 18, lower support shoe; 19, walking wheel; 20, wheeled cutter head; 21, cutter arm; 22, drive cylinder; 23, first locking pin shaft; 24, transverse telescopic cylinder; 25, main beam; 26, sliding sleeve; 27, transverse inner sleeve; 28, second locking pin shaft; 29, oil filling hole; 30, third locking hole; 31, transverse outer sleeve; 32, second locking hole; 33, vertical insert arm; 34, vertical guide sleeve; 35, sleeve body. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0034] It should be noted that the terms that may appear, such as "first" and "second", etc., are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." etc. do not exclude the existence of other identical elements in the process, method, article or device including the elements. In addition, the terms "front", "back", "up", "down", "left" and "right" are based on the orientation and positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention, rather than indicating that the device or component referred to must have a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] Embodiment 1 of the corner excavation equipment of the city gate tunnel of the present invention:

[0037] like Figure 1 and Figure 2 As shown, the corner excavation equipment of the gate-shaped tunnel includes a main beam 25 and a sliding sleeve 26. The main beam 25 extends in the front-to-back direction. The sliding sleeve 26 is sleeved outside the main beam 25 and slidably assembled on the main beam 25 in the front-to-back direction. The front and rear ends of the main beam 25 are respectively connected to other equipment of the tunnel boring machine.

[0038] In this embodiment, the main beam 25 is provided with a front support body 11 and a rear support body 17 outside the sliding travel of the sliding sleeve 26, that is, the sliding sleeve 26 is located between the front support body 11 and the rear support body 17, and the two support bodies are provided with grippers. Among them, the lower parts of the front support body 11 and the rear support body 17 are provided with walking wheels 19 to facilitate the movement of the entire excavation equipment.

[0039] In this embodiment, the positions and numbers of the grippers on the two support bodies are the same, and only the arrangement angles are different. Taking the front support body 11 as an example, the front support body 11 is provided with two upper grippers 12 and two lower grippers 18, the two upper grippers 12 are symmetrically arranged on the left and right sides of the main beam 25, and are used to support the cave wall obliquely upward; the two lower grippers 18 are symmetrically arranged on the left and right sides of the main beam 25, and are used to support the cave wall obliquely downward.

[0040] In this embodiment, a retractable front protective cover 13 is provided between the sliding sleeve 26 and the front support body 11, and a retractable rear protective cover 16 is provided between the sliding sleeve 26 and the rear support body 17. The front protective cover 13 and the rear protective cover 16 are used to protect the outer surface of the main beam 25 to prevent dust and other impurities from falling on the main beam 25 and affecting the sliding of the sliding sleeve 26 on the main beam 25.

[0041] like Figure 1 and Figure 2 As shown, a knife arm 21 is provided on the left and right sides of the sliding sleeve 26, and a wheeled cutter disc 20 is connected to the lower part of the knife arm 21, and the axis of the wheeled cutter disc 20 extends in the left and right direction. A driving cylinder 22 is provided between the rear support body 17 and the knife arm 21, and the driving cylinder is used to drive the sliding sleeve 26, the knife arm 21 and the wheeled cutter disc 20 to slide on the main beam 25. In other embodiments, the driving cylinder can be arranged between the front support body and the knife arm.

[0042] In this embodiment, a vertical telescopic cylinder 14 for driving the knife arm 21 to move in the up-down direction is provided between the upper part of the knife arm 21 and the sliding sleeve 26. Specifically, a vertical guide sleeve 34 is provided on the sliding sleeve 26, and the vertical guide sleeve 34 constitutes a vertical guide structure. The upper part of the knife arm 21 is in the vertical guide sleeve 34, and the vertical guide sleeve 34 is used to guide the knife arm 21 to move in the up-down direction. The upper end of the vertical telescopic cylinder 14 is hinged on the sliding sleeve 26, and the lower end of the vertical telescopic cylinder 14 is hinged on the upper end of the knife arm 21 to drive the knife arm 21 to move in the up-down direction. Among them, the vertical guide sleeve 34 can limit the knife arm 21 in the front-back direction, so that the reaction force of the rock to be cut is transmitted to the vertical guide sleeve 34, rather than the vertical telescopic cylinder 14. It should be noted that the vertical guide sleeve 34 has a certain strength to avoid deformation or damage when subjected to the reaction force of the rock to be cut.

[0043] In this embodiment, each knife arm 21 corresponds to two vertical telescopic cylinders 14, and the vertical telescopic cylinders 14 corresponding to the same knife arm 21 are arranged at intervals in the front-to-back direction. Correspondingly, two vertical guide sleeves 34 are arranged at intervals in the front-to-back direction, and the upper part of the knife arm 21 is a fork arm structure, which includes two vertical insert arms 33 arranged at intervals in the front-to-back direction, and the vertical insert arms 33 correspond to the vertical guide sleeves 34 one by one, and the vertical insert arms 33 are guided and slidably assembled in the vertical guide sleeves 34 in the up-down direction.

[0044] In this embodiment, the outer side (at the section line) of the vertical insert arm 33 and the inner side (at the section line) of the vertical guide sleeve 34 are provided with a wear-resistant layer to prevent the vertical insert arm 33 and the vertical guide sleeve 34 from being worn and affecting the guiding accuracy; wherein the wear-resistant layer is fixed by screws for easy disassembly and assembly during replacement.

[0045] like Figure 2 and Figure 4 As shown, a vertical locking member is provided between the vertical insertion arm 33 and the vertical guide sleeve 34, and the vertical locking member is used to lock the vertical insertion arm 33 and the vertical guide sleeve 34 together after the vertical insertion arm 33 slides into place. Specifically, the vertical locking member is a first locking pin shaft 23, a first locking hole is provided on the vertical guide sleeve 34, and a second locking hole 32 is provided on the vertical insertion arm 33. A plurality of second locking holes 32 are arranged at intervals along the up-down direction, and the first locking pin shaft 23 is inserted into the corresponding first locking hole and second locking hole 32 to lock the vertical insertion arm 33 and the vertical guide sleeve 34 together. The first locking pin shaft 23 not only plays a positioning role, but also utilizes its anti-shear function to prevent the vertical telescopic cylinder 14 from being subjected to a large bearing force.

[0046] like Figure 2 and Figure 3 As shown, the sliding sleeve 26 includes a sleeve body 35 and two movable frames 15 arranged on the left and right sides of the sleeve body 35. The sleeve body 35 is guided and slidably assembled on the main beam 25 along the front-back direction. A transverse telescopic cylinder 24 is arranged between the sleeve body 35 and the corresponding movable frame 15. The transverse telescopic cylinder 24 is used to drive the movable frame 15 to move in the left-right direction relative to the sleeve body 35. Among them, the vertical guide sleeve 34 is arranged on the movable frame 15.

[0047] In this embodiment, the movable frame 15 includes a vertical plate, the outer side of the vertical plate is provided with the above-mentioned vertical guide sleeve 34, the inner side of the vertical plate is provided with a horizontal inner sleeve 27, and the sleeve body 35 is provided with a horizontal outer sleeve 31. The horizontal inner sleeve 27 is located in the horizontal outer sleeve 31 and cooperates with the horizontal outer sleeve 31 for guiding. The horizontal outer sleeve 31 is used to guide the movable frame 15 to move in the left and right directions. The horizontal telescopic cylinder 24 is arranged in the horizontal inner sleeve 27, one end of the horizontal telescopic cylinder 24 is hinged to the vertical plate of the movable frame 15, and the other end of the horizontal telescopic cylinder 24 is hinged to the sleeve body 35. Among them, the horizontal outer sleeve 31 constitutes a horizontal guide structure.

[0048] In this embodiment, the outer side (at the section line) of the transverse inner sleeve 27 and the inner side (at the section line) of the transverse outer sleeve 31 are provided with a wear-resistant layer to prevent the transverse inner sleeve 27 and the transverse outer sleeve 31 from being worn and affecting the guiding accuracy; wherein the wear-resistant layer is fixed by screws for easy disassembly and assembly during replacement.

[0049] In this embodiment, a transverse locking member is provided between the transverse outer sleeve 31 and the transverse inner sleeve 27, and the transverse locking member is used to lock the transverse inner sleeve 27 and the transverse outer sleeve 31 together after the transverse inner sleeve 27 slides into place. Specifically, the transverse locking member is a second locking pin shaft 28, a third locking hole 30 is provided on the transverse inner sleeve 27, and a fourth locking hole is provided on the transverse outer sleeve 31. A plurality of third locking holes 30 are arranged at intervals along the left-right direction, and the second locking pin shaft 28 is inserted into the corresponding third locking hole 30 and fourth locking hole to lock the transverse inner sleeve 27 and the transverse outer sleeve 31 together. The second locking pin shaft 28 not only plays a positioning role, but also uses its shear resistance function to prevent the transverse telescopic cylinder 24 from being subjected to a large bearing force.

[0050] In this embodiment, two transverse telescopic cylinders 24 are provided on the upper and lower sides of the left and right sides of the sleeve body 35 to ensure the stability of the movable frame 15 moving in the left and right directions.

[0051] like Figure 3 As shown, an oil injection hole 29 is provided on the transverse outer sleeve 31 , and grease is injected into between the transverse inner sleeve 27 and the transverse outer sleeve 31 through the oil injection hole 29 to facilitate the sliding of the transverse inner sleeve 27 in the transverse outer sleeve 31 .

[0052] In this embodiment, an oil filling hole is provided on the vertical guide sleeve 34 , and grease is injected into the space between the vertical guide sleeve 34 and the vertical insertion arm 33 through the oil filling hole to facilitate the vertical insertion arm 33 to slide in the vertical guide sleeve 34 .

[0053] In this embodiment, both the horizontal telescopic cylinder 24 and the vertical telescopic cylinder 14 are hydraulic cylinders.

[0054] The working process of the corner excavation equipment of the city gate tunnel of the present invention is as follows:

[0055] During conventional straight section excavation, the wheeled cutterhead 20 is adjusted to meet the specified excavation section requirements by adjusting the vertical telescopic cylinder 14 and the horizontal telescopic cylinder 24, and then the first locking pin 23 and the second locking pin 28 are used to lock the movable frame 15 and the cutter arm 21, so that the movable frame 15 and the cutter arm 2 do not produce relative movement; then, the vertical telescopic cylinder 14 and the horizontal telescopic cylinder 24 are adjusted to a free state, and the wheeled cutterhead 20 starts excavation. When the excavation section size of the tunnel changes, the first locking pin 23 and the second locking pin 28 are pulled out, and the vertical telescopic cylinder 14 and the horizontal telescopic cylinder 24 are readjusted to adjust the wheeled cutterhead 20 to a new excavation position to meet the excavation requirements of different section sizes.

[0056] When the tunnel encounters transition sections such as ups and downslopes and small left and right turns, the first locking pin shaft 23 and the second locking pin shaft 28 are pulled out, and the vertical telescopic cylinder 14 and the horizontal telescopic cylinder 24 are used to provide support for the excavation of the wheeled cutter head 20. When the excavation equipment is working, the sliding sleeve 26 slides forward along the main beam 25, and the vertical telescopic cylinder 14 and the horizontal telescopic cylinder 24 can be adjusted according to the force applied to prevent the wheeled cutter head 20 from getting stuck during excavation, realizing the adaptive and continuous adjustment of the wheeled cutter head 20 during the entire construction process, and improving the reliability of the equipment and the construction quality.

[0057] The corner excavation equipment for the city gate-shaped tunnel of the present invention adjusts the up-down and left-right excavation depth of the wheeled cutter disc by adjusting the transverse telescopic cylinder and the vertical telescopic cylinder according to the diameter of the excavated tunnel, so as to meet the excavation requirements of different cross-sectional sizes, realize multi-purpose use of one machine, and reduce costs. Moreover, since the cutter arm moves in the up-down direction and is limited by the vertical guide sleeve in the front-back direction, the reaction force of the rock to be cut will be transmitted to the vertical guide sleeve after acting on the wheeled cutter disc, and will not transmit the force to the vertical telescopic cylinder, thereby improving the service life of the vertical telescopic cylinder. In addition, compared with the prior art, even if the vertical telescopic cylinder and the transverse telescopic cylinder fail, the wheeled cutter disc will not swing backward and upward under the reaction force of the rock to be cut, thereby ensuring the safety of the staff.

[0058] Embodiment 2 of the corner excavation equipment of the city gate tunnel of the present invention:

[0059] The difference between this embodiment and embodiment 1 is that in embodiment 1, the vertical guide structure is a vertical guide sleeve, and the upper part of the knife arm is guided and slidably assembled in the vertical guide sleeve in the up-down direction. In this embodiment, the vertical guide structure is a vertical guide rail, and the vertical guide rail is provided with a T-shaped slot extending in the up-down direction, and the upper part of the knife arm is provided with a protrusion extending in the up-down direction, and the protrusion is adapted to the T-shaped slot. In other embodiments, the T-shaped slot can be replaced by a dovetail slot.

[0060] Embodiment 3 of the corner excavation equipment of the city gate tunnel of the present invention:

[0061] The difference between this embodiment and embodiment 1 is that in embodiment 1, the vertical locking member is a first locking pin shaft, a first locking hole is provided on the vertical guide sleeve, a second locking hole is provided on the upper part of the knife arm, a plurality of second locking holes are arranged at intervals in the up-down direction, and the first locking pin shaft is inserted into the corresponding first locking hole and second locking hole to lock the upper part of the knife arm and the vertical guide sleeve together. In this embodiment, the vertical locking member is a set screw, a threaded hole is provided on the vertical guide sleeve, and the upper part of the knife arm and the vertical guide sleeve are locked together by the set screw.

[0062] Embodiment 4 of the corner excavation equipment of the city gate tunnel of the present invention:

[0063] The difference between this embodiment and embodiment 1 is that in embodiment 1, each knife arm corresponds to two vertical telescopic cylinders, two vertical guide sleeves are arranged at intervals along the front-to-back direction, the upper part of the knife arm is a fork arm structure, the fork arm structure includes two vertical plug arms arranged at intervals along the front-to-back direction, the vertical plug arms correspond to the vertical guide sleeves one by one and are guided and slidably assembled in the vertical guide sleeves. In this embodiment, based on the situation that each knife arm corresponds to two vertical telescopic cylinders, one vertical guide sleeve is provided, the upper part of the knife arm is adapted to the vertical guide sleeve, and is slidably assembled in the vertical guide sleeve.

[0064] Embodiment 5 of the corner excavation equipment of the city gate tunnel shape of the present invention:

[0065] The difference between this embodiment and embodiment 1 is that in embodiment 1, the transverse guide structure is a transverse outer sleeve, the movable frame is provided with a transverse inner sleeve, the transverse inner sleeve is slidably assembled in the transverse outer sleeve in the left-right direction, and the transverse telescopic cylinder is in the transverse inner sleeve. In this embodiment, the transverse guide structure is a transverse guide rail, the transverse guide rail is provided with a T-shaped slot extending in the left-right direction, the inner side of the vertical plate is provided with a transverse slider extending in the left-right direction, the transverse slider is adapted to the T-shaped slot, wherein the transverse slider is fixed by a set screw after sliding into place on the transverse guide rail.

[0066] Embodiment 6 of the corner excavation equipment of the city gate tunnel of the present invention:

[0067] The difference between this embodiment and embodiment 1 is that in embodiment 1, the lateral telescopic cylinders are provided on both upper and lower sides of the left and right sides of the sleeve body. In this embodiment, the lateral telescopic cylinders are provided only on the upper side or the lower side of the left and right sides of the sleeve body.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. The corner excavation equipment of the city gate tunnel is characterized by: It includes a main beam and a sliding sleeve, the main beam extends in the front-to-back direction, the sliding sleeve is slidably assembled on the main beam in the front-to-back direction, a support body is provided on the main beam outside the sliding stroke of the sliding sleeve, and a support shoe is provided on the support body; knife arms are respectively provided on the left and right sides of the sliding sleeve, the lower part of the knife arm is connected with a wheel cutter disc, a vertical telescopic cylinder for driving the knife arm to move in the up and down directions is provided between the upper part of the knife arm and the sliding sleeve, a vertical guide structure is provided on the sliding sleeve, the vertical guide structure is used to guide the knife arm to move in the up and down directions and limit the knife arm in the front-to-back direction, so that the horizontal reaction force generated by the rock to be cut acts on the wheel cutter disc and then is transmitted to the vertical guide structure, and no force is transmitted to the vertical telescopic cylinder; a driving cylinder for driving the sliding sleeve to slide on the main beam is provided between the support body and the knife arm or the sliding sleeve.

2. The corner excavation equipment for gate-shaped tunnels according to claim 1 is characterized in that: The vertical guide structure is a vertical guide sleeve, the upper part of the knife arm is guided and slidably assembled in the vertical guide sleeve in the up and down directions, and the vertical telescopic cylinder is located in the vertical guide sleeve.

3. The corner excavation equipment for gate-shaped tunnels according to claim 2 is characterized in that: A vertical locking piece is provided between the upper part of the knife arm and the vertical guide sleeve, and the vertical locking piece is used to lock the upper part of the knife arm and the vertical guide sleeve together after the upper part of the knife arm slides into place.

4. The corner excavation equipment for gate-shaped tunnels according to claim 3 is characterized in that: The vertical locking piece is a locking pin shaft, a first locking hole is provided on the vertical guide sleeve, a second locking hole is provided on the upper part of the knife arm, at least two first locking holes and / or second locking holes are arranged at intervals in the up and down directions, and the locking pin shaft is inserted into the corresponding first locking hole and second locking hole to lock the upper part of the knife arm and the vertical guide sleeve together.

5. The corner excavation equipment for a city gate tunnel according to any one of claims 1 to 4, characterized in that: Each knife arm corresponds to at least two vertical telescopic cylinders, and the vertical telescopic cylinders corresponding to the same knife arm are arranged at intervals in the front-to-back direction.

6. The corner excavation equipment for a city gate tunnel according to any one of claims 2 to 4, characterized in that: There are two vertical guide sleeves arranged at intervals along the front-to-back direction. The upper part of the knife arm is a fork arm structure, which includes two vertical insertion arms arranged at intervals along the front-to-back direction. The vertical insertion arms correspond to the vertical guide sleeves one by one and are guided and slidably assembled in the vertical guide sleeves.

7. The corner excavation equipment for a city gate tunnel according to any one of claims 1 to 4, characterized in that: The sliding sleeve includes a sleeve body and two movable frames arranged on the left and right sides of the sleeve body. A transverse telescopic cylinder for driving the movable frame to move in the left and right directions is arranged between the sleeve body and the corresponding movable frame. A transverse guide structure for guiding the movable frame to move in the left and right directions is arranged on the sleeve body, wherein the vertical guide structure is arranged on the movable frame.

8. The corner excavation equipment for gate-shaped tunnels according to claim 7 is characterized in that: The transverse guide structure is a transverse outer sleeve, and a transverse inner sleeve is arranged on the movable frame. The transverse inner sleeve is slidably assembled in the transverse outer sleeve in the left-right direction, and the transverse telescopic cylinder is located in the transverse inner sleeve.

9. The corner excavation equipment for gate-shaped tunnels according to claim 8, characterized in that: A transverse locking piece is provided between the transverse outer sleeve and the transverse inner sleeve, and the transverse locking piece is used to lock the transverse inner sleeve and the transverse outer sleeve together after the transverse inner sleeve slides into place.

10. The corner excavation equipment for gate-shaped tunnels according to claim 7, characterized in that: The lateral telescopic cylinders are arranged on the upper and lower sides of the left and right sides of the sleeve body.

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