Pushing tunneling equipment

Abstract

The utility model provides a pushing tunneling device. The pushing tunneling equipment comprises a pushing end which is used for being connected with a fixed end and pushing a target object relative to the fixed end; the one or more limiting structures are mounted at the fixed end and can be switched between at least two states including a first state and a second state; wherein the limiting structure is used for stopping the target object in the first state so as to limit the target object to move relative to the fixed end, and the limiting structure is used for avoiding the target object in the second state. The pushing tunneling equipment can prevent the pushed target object from moving or shifting due to the compression of the soil body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, specifically, relates to a jacking tunneling equipment. BACKGROUND

[0002] The jacking tunneling equipment is a commonly used device in tunnel construction. For example, when tunnel construction is carried out by mechanical method, it is often necessary to involve the tunneling and laying of a bypass channel (for example, a connecting channel of a subway). Taking the connecting channel as an example, in the construction thereof, a pre-support trolley needs to be opened in the starting process, and the trolley is supported on the inner wall of the tunnel in the upward, downward, leftward and rightward directions, and the counterforce structure of the jacking tunneling equipment is supported on the main tunnel segment on the opposite side of the starting direction, so as to bear the thrust as the backrest of the jacking tunneling equipment. Further, the jacking tunneling equipment can push the main machine of the tunneling device and / or the segment to be laid forward, so as to carry out the construction.

[0003] It can be understood that, in addition to the bypass channel construction, the jacking tunneling equipment also has many other application scenarios in tunnel construction. It can be used for lateral jacking, and can also be used for longitudinal or inclined jacking. In addition to subway construction, the jacking tunneling equipment also has wide application prospects in the fields of underground pipeline laying, municipal pipe gallery construction and mining excavation.

[0004] As mentioned above, the jacking tunneling equipment needs to provide a counterforce through the counterforce structure to push the target object forward. In tunnel construction, such a target object is generally the main machine of a tunneling machine or a segment to be laid. The target object as the jacking target will bear the pressure from the soil body, so that the target object has a tendency to move in the direction of the counterforce structure after being stressed. Therefore, how to avoid the jacked target object from moving or shifting due to the pressure of the soil body is a technical problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a jacking tunneling equipment to solve the technical problem that the jacked target object moves or shifts due to the pressure of the soil body in the prior art.

[0006] To solve the above problems, the utility model provides a jacking tunneling equipment, which comprises: a target object; a jacking end, which is used to be connected with a fixed end and jacks the target object relative to the fixed end; one or more limiting structures, which are installed on the fixed end and can be switched between at least two states including a first state and a second state; wherein the limiting structure stops the target object in the first state to limit the movement of the target object relative to the fixed end, and the limiting structure avoids the target object in the second state.

[0007] In the above technical solution, the jacking tunneling equipment further comprises a fixed end, and the fixed end is a starting sleeve.

[0008] The jacking tunneling equipment further comprises a fixed end and a starting sleeve, and the fixed end is a fixed sleeve arranged outside the starting sleeve.

[0009] In the technical solution, the limiting structure is fixedly installed on the fixed end, or the limiting structure is movably installed on the fixed end.

[0010] In the technical solution, the two limiting structures are symmetrically arranged on the left and right sides of the fixed end, or the two limiting structures are symmetrically arranged on the upper and lower sides of the fixed end, or the multiple limiting structures are dispersedly arranged on the fixed end.

[0011] In the technical solution, the fixed end is a pipe segment, a wall body or a soil body.

[0012] In the technical solution, the jacking tunneling equipment further comprises one or more fixed seats, and the fixed seat is fixedly connected to the fixed end; wherein the limiting structure is installed on at least part of the fixed seat.

[0013] In the technical solution, the target object comprises a host, the fixed end is a pipe segment with an arc shape, the inner concave surface of the pipe segment has a platform structure, and the limiting structure is installed on the platform structure.

[0014] In the technical solution, the limiting structure comprises: an installation part, at least part of the installation part is installed on the fixed end; a limiting part, the limiting part is connected to the installation part; wherein at least part of the limiting part can move relative to the installation part.

[0015] In the technical solution, at least part of the limiting part moves relative to the installation part by at least one of the following actions or a combination thereof: rotation, overturning, movement, and telescoping.

[0016] In the technical solution, the limiting part can move relative to the installation part to adjust the extension length of the limiting part relative to the installation part.

[0017] In the technical solution, the limiting structure further comprises a telescopic driving mechanism for driving the limiting part to move; wherein the telescopic mechanism is an automatic telescopic driving mechanism or a manual telescopic driving mechanism.

[0018] In the technical solution, the limiting part comprises a head end and a tail end, the head end changes the pose relative to the installation part to switch the limiting part between at least two states, and the tail end is movably connected to the installation part and adjusts the extension length of the limiting part relative to the installation part by moving relative to the installation part.

[0019] In the technical solution, the installation part comprises an abutting part, and the ring nut is in abutting contact with the abutting part to provide a counterforce required for the ring nut to be screwed.

[0020] The technical scheme above, the limiting structure further comprises: a screwing part, the screwing part is arranged at the tail end; wherein the screwing part is used for inserting the screwing tool, so that the screwing tool drives the tail end to move forward and backward by rotating at least part of the screwing part.

[0021] The technical scheme above, the screwing part comprises: a rotatable ring nut, the ring nut is arranged at the tail end and is in threaded connection with the tail end; wherein the ring nut drives the tail end to move forward and backward by rotating.

[0022] The technical scheme above, the screwing part further comprises: a sleeve, the sleeve is sleeved outside the ring nut and is connected with the mounting part, and the sleeve has an opening; wherein the ring nut can rotate in the sleeve.

[0023] The technical scheme above, the ring nut has one or more screwing tool insertion holes corresponding to the position of the opening.

[0024] The technical scheme above, the mounting part comprises: a first mounting part, the first mounting part is mounted on the fixed end; a second mounting part, the second mounting part is connected with the first mounting part and protrudes outward relative to the surface of the first mounting part; wherein the limiting piece is supported by the second mounting part.

[0025] The technical scheme above, the limiting piece comprises a head end and a tail end, the tail end is connected with the mounting part, and the head end switches between at least two states including a first state and a second state by moving relative to the tail end.

[0026] The technical scheme above, the head end and the tail end are connected in a detachable manner.

[0027] The technical scheme above, the limiting structure further comprises: a locking piece, the locking piece is used for locking the head end relative to the tail end, so that the limiting piece remains in the first state.

[0028] The technical scheme above, the head end and the tail end are connected through a ball hinge structure; or the head end and the tail end are connected through a pin shaft structure.

[0029] The technical scheme above, the limiting structure further comprises: a first pin shaft, the first pin shaft penetrates the head end and the tail end to rotationally connect the two; a second pin shaft, the second pin shaft can be inserted and pulled out relative to the head end and the tail end in a movable manner, so that the limiting structure remains in the first state by locking the two.

[0030] The technical scheme above, the head end comprises two first abutting pieces, the tail end comprises a second abutting piece arranged between the two first abutting pieces, the first pin shaft and the second pin shaft respectively penetrate the first abutting piece and the second abutting piece, and the first abutting piece and the second abutting piece abut and contact each other.

[0031] In the technical scheme, the first abutting part is formed as a flat plate structure, and the second abutting part has a flat surface, and the first abutting part and the flat surface are in surface contact.

[0032] In the technical scheme, the head end has a convex surface, the tail end has a concave surface, and the head end and the tail end are in concave-convex matching at the connecting position, so that the head end can rotate relative to the tail end.

[0033] In the technical scheme, the limiting structure further comprises a bolt, and the bolt connects the head end and the tail end at the connecting position; wherein the head end can rotate relative to the tail end around the bolt.

[0034] In the technical scheme, the limiting part is movably connected with the mounting part, and the mounting part has a contact part, and the contact part is in abutting contact with the limiting part to limit the freedom of movement of the limiting part relative to the mounting part.

[0035] In the technical scheme, the contact part is symmetrically arranged on opposite sides of the limiting part.

[0036] In the technical scheme, the contact part and the limiting part are in surface contact, line contact or point contact.

[0037] In the technical scheme, at least part or all of the contact part can move to approach or move away from the limiting part.

[0038] In the technical scheme, the mounting part comprises a first mounting part mounted on the fixed end, and a second mounting part connected with the first mounting part and protruding outward relative to the surface of the first mounting part; wherein the limiting part is movably connected with the second mounting part, and at least part or all of the second mounting part is formed as the contact part.

[0039] In the technical scheme, the second mounting part comprises a connecting part connected with the first mounting part, a through hole is arranged on the connecting part, and the limiting part penetrates through the through hole; and an abutting part connected with the first mounting part and / or the connecting part; wherein two abutting parts are symmetrically arranged on opposite sides of the limiting part and abuttingly contact with the limiting part.

[0040] In the technical scheme, the abutting part comprises a support plate connected with the first mounting part and / or the connecting part, and an abutting nail penetrating through the support plate and used for abuttingly contacting with the limiting part; wherein the abutting nail can move relative to the support plate to approach or move away from the limiting part.

[0041] In the technical scheme, the limiting part can also move relative to the mounting part to adjust the extension length of the limiting part relative to the mounting part, and the contact part is used for limiting the movement direction of the limiting part relative to the mounting part.

[0042] In the technical solution, the limiting piece includes a head end and a tail end, the head end is movable relative to the tail end, the limiting piece is switched between at least two states, and the contact part is used for limiting the moving direction of the head end relative to the tail end.

[0043] Advantages

[0044] The pushing and tunneling equipment includes a pushing end and one or more limiting structures. The pushing end is used for connecting with the fixed end and pushing the target object relative to the fixed end. The limiting structure is installed on the fixed end and can be switched between at least two states including a first state and a second state. In the first state, the limiting structure stops the target object to limit the movement of the target object relative to the fixed end, and in the second state, the limiting structure avoids the target object. Therefore, the pushing and tunneling equipment provided by the utility model can stop and limit the target object to limit the movement of the target object, thereby avoiding the movement or displacement of the target object due to the pressure of the soil body. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 The pushing and tunneling equipment of the first embodiment of the utility model (top view direction-ball hinge flip opening and closing type-first state);

[0046] Figure 2 The pushing and tunneling equipment of the first embodiment of the utility model (top view direction-ball hinge flip opening and closing type-second state);

[0047] Figure 3 The pushing and tunneling equipment of the second embodiment of the utility model (top view direction-pin shaft rotation opening and closing type-first state);

[0048] Figure 4 The pushing and tunneling equipment of the second embodiment of the utility model (top view direction-pin shaft rotation opening and closing type-second state);

[0049] Figure 5 The pushing and tunneling equipment of the second embodiment of the utility model (side view direction-pin shaft rotation opening and closing type-first state);

[0050] Figure 6 The pushing and tunneling equipment of the third embodiment of the utility model (the limiting structure is installed on the fixed sleeve-top view direction);

[0051] Figure 7 The pushing and tunneling equipment of the fourth embodiment of the utility model (the limiting structure is installed on the pipe piece-side view direction);

[0052] Figure 8 The pushing and tunneling equipment of the fifth embodiment of the utility model (the length of the limiting structure is fixed-perspective view);

[0053] Figure 9 The pushing and tunneling equipment of the fifth embodiment of the utility model (the length of the limiting structure is fixed-perspective view);Figure 8 Close-up view of the middle D part;

[0054] Figure 10 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model;

[0055] Figure 11 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model; Figure 10 Close-up view of the middle C part;

[0056] Figure 12 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model;

[0057] Figure 13 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model; Figure 12 Close-up view of the middle A part;

[0058] Figure 14 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model;

[0059] Figure 15 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model; Figure 14 Close-up view of the middle B part;

[0060] Figure 16 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model;

[0061] Figure 17 The pushing and tunneling equipment (perspective view - pin shaft rotating opening and closing type - second state) of the second embodiment of the utility model;

[0062] BRIEF DESCRIPTION OF DRAWINGS

[0063] Fixed end: 100; fixed seat: 110; target object: 200; limiting structure: 300; mounting part: 310; first mounting part: 311; second mounting part: 312; through hole: 312a; connecting part: 312b; abutting part: 312c; support plate: 312c1; abutting nail: 312c2; notch: 312c3; limiting piece: 320; head end: 320a; tail end: 320b; second abutting part: 321; first abutting part: 322; first pin shaft: 330; second pin shaft: 340; screwing part: 350; sleeve: 351; opening: 351a; ring sleeve: 352; screwing tool insertion hole: 352a; bolt: 370; telescopic driving mechanism: 380; originating sleeve: 400; platform structure: 610; segment: 600. DETAILED DESCRIPTION

[0064] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0065] The present application provides a kind of push tunneling equipment, which is the equipment commonly used in tunnel construction. For example, when tunnel construction is carried out by mechanical method, it is often necessary to involve the excavation and laying of bypass channel (such as the communication channel of subway). Taking the communication channel as an example, it needs to be opened in the starting process during construction, and it is supported on the inner wall of the tunnel in the upper, lower, left and right directions, and the counterforce structure of the push tunneling equipment is supported on the main tunnel segment on the opposite side of the starting direction, to bear the thrust as the back of the push tunneling equipment. Further, the push tunneling equipment can push the main machine of the tunneling equipment and / or the pipe segment to be laid forward to carry out construction.

[0066] For the basic structure and working principle of the push tunneling equipment, please refer to the prior art disclosed in Chinese patents CN219910759U, CN219840653U and CN218780355U (also the applicant's prior application), which will not be repeated here.

[0067] It can be understood that in addition to bypass channel construction, the push tunneling equipment also has many other application scenarios in tunnel construction. It can be used for horizontal pushing, and also for vertical or inclined pushing. In addition to subway construction, the push tunneling equipment also has wide application prospects in the fields of underground pipeline laying, municipal pipe gallery construction and mining excavation.

[0068] The push tunneling equipment needs to provide a counterforce to the target object by the counterforce structure. In tunnel construction, the counterforce structure is generally a counterforce frame, and the target object is generally the main machine of the tunneling machine or the pipe segment to be laid. The counterforce structure is connected to the fixed end of the push tunneling equipment by a structure such as a pull rod. Since the counterforce structure is connected to the fixed end, the counterforce cylinder above the counterforce structure can push the target object when providing the pushing force, so as to realize the excavation of the tunnel and the laying of the pipe segment.

[0069] For example, the counterforce structure is located at the right side of Figure 1 . The counterforce structure is connected to the fixed end 100, Figure 1 The fixed end 100 in Figure 1 is a sleeve fixed to the pipe segment 600, and the counterforce structure is connected to the fixed end 100 along Figure 1In the direction from right to left, the target object 200 is pushed to the left, and the target object 200 is the main machine of the pushing and excavating equipment. Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 As indicated by the direction of the arrow, the target object 200 as the pushing target will bear the pressure from the soil, so that the target object 200 will tend to move in the direction of the counterforce structure after being stressed. Therefore, it is necessary to avoid the movement or displacement of the target object 200 pushed by the soil.

[0070] Therefore, the utility model provides a pushing and excavating equipment, which comprises a pushing end (not shown in the figure) and one or more limiting structures 300. The pushing end is used to be connected with the fixed end 100 and push the target object 200 relative to the fixed end 100. The limiting structure 300 is installed on the fixed end 100 and can be switched between at least two states including a first state and a second state. In the first state, the limiting structure 300 stops the target object 200 to limit the movement of the target object 200 relative to the fixed end 100, and in the second state, the limiting structure 300 avoids the target object 200.

[0071] In the above embodiment, the pushing end can be a counterforce device, which is provided with a power mechanism for applying a pushing force. A gap can be left between the pushing end and the fixed end 100, which can accommodate the target object 200. Since the pushing end is connected with the fixed end 100, the pushing force applied by the pushing end can push the target object 200 between the pushing end and the fixed end 100 in the direction of the fixed end 100. Specifically, the counterforce device can be a counterforce frame, and the power mechanism provided by the counterforce device can be a counterforce oil cylinder. The number of counterforce oil cylinders can be one or more. The counterforce frame can be a support or a box structure.

[0072] After describing the function of the limiting structure 300 of the utility model, the installation position and installation method of the limiting structure 300 of the utility model will be described below.

[0073] As shown in Figure 1 , the fixed end 100 can be a sleeve of the pushing and excavating equipment, which can be fixed on the pipe segment 600 or in the soil, or can be directly fixed in the soil. As shown in Figure 7 , the fixed end can also be the pipe segment 600 or the soil. In the case that the fixed end 100 is a sleeve or a part of the sleeve, the fixed end 100 belongs to a part of the pushing and excavating equipment. In the case that the fixed end 100 is the pipe segment 600 or the soil, the fixed end 100 does not belong to a part of the pushing and excavating equipment.

[0074] It can be understood that the segment 600 referred to in the above embodiments is a segment that has been assembled on the inner wall of the tunnel. The segment that is the target object 200 or one of the target objects 200 is a segment to be assembled.

[0075] It can be understood that whether the sleeve is used as the fixed end 100 or the segment 600 or the soil is used as the fixed end, the function of the fixed end is to connect and fix the jacking end so that the jacking end can apply the jacking force to the target object 200.

[0076] The limiting structure 300 of the utility model can be installed in various different positions, and specific examples are as follows.

[0077] As shown in Figure 1 and Figure 2 In an embodiment of the utility model, the limiting structure 300 is installed on the originating sleeve. In other words, the jacking tunneling equipment further comprises the fixed end 100, and the fixed end 100 is the originating sleeve. In this case, the limiting structure 300 is installed on the outer sidewall of the originating sleeve, and the limiting structure 300 and the originating sleeve can be directly connected or indirectly connected. Since the host machine or the segment to be assembled is generally used as the target object 200, installing the limiting structure 300 on the originating sleeve can facilitate limiting and stopping at least part or all of the target objects 200 that have entered the originating sleeve, preventing displacement or disengagement relative to the originating sleeve.

[0078] As shown in Figure 5 and Figure 6 In another embodiment of the utility model, a fixed structure can be separately provided outside the originating sleeve of the host machine for installing the limiting structure 300. Specifically, the jacking tunneling equipment further comprises the fixed end 100 and the originating sleeve 400, and the fixed end 100 is a fixed sleeve sleeved outside the originating sleeve 400. In this case, the limiting structure 300 is installed on the outer sidewall of the fixed sleeve, and the limiting structure 300 and the fixed sleeve can be directly connected or indirectly connected. It can be understood that the fixed sleeve is formed in a cylindrical shape and is sleeved outside the originating sleeve, and it can be connected with the originating sleeve or can only be sleeved with the originating sleeve without being directly connected. The fixed sleeve is used for installing the limiting structure 300, and it can also be installed and fixed on the segment 600 or the soil.

[0079] As shown in Figure 7 In still another embodiment of the utility model, the limiting structure 300 can be installed on the segment 600 or the wall or the soil. In other words, the fixed end 100 is the segment or the wall or the soil. In this case, the limiting structure 300 can be directly connected and fixed with the segment 600 or the wall or the soil, or the connection and fixation with the segment 600 or the wall or the soil can be realized through an anchoring structure.

[0080] Exemplarily, as shown inFigure 7 As shown, the pushing and excavating equipment further comprises one or more fixed seats 110 fixedly connected to the fixed end 100; wherein the limiting structure 300 is installed on at least part of the fixed seats 110. Preferably, the fixed seat 110 is a reinforced concrete embedded block (also known as an anchor block). The limiting structure 300 can be fixedly connected to the fixed seat 110, or can be movably connected to the fixed seat 110, so as to adjust the installation position by installing the fixed seat 110 at different positions in the plurality of fixed seats 110.

[0081] As shown in the drawings, Figure 17 As shown, a platform for installing the limiting structure 300 and other required structures can also be erected or laid on the pipe segment serving as the fixed end 100 using concrete or steel structure. In other words, the fixed end 100 is a pipe segment with an arc shape, and the inner concave surface of the pipe segment has a platform structure 610 on which the limiting structure 300 is installed. The platform structure 610 can be a steel plate or a steel box connected to the pipe segment, or can be concrete cast on the inner concave surface of the pipe segment.

[0082] In some embodiments of the present application, the limiting structure 300 is fixedly installed on the fixed end 100, and the specific fixed installation method can be welding or rivet connection. The above connection methods are relatively more stable. In some embodiments of the present application, the limiting structure 300 is movably installed on the fixed end 100. The specific movable installation method can be plug-in. For example, a sliding groove is provided on the fixed end 100, and the limiting structure 300 is inserted into the sliding groove.

[0083] As shown in the drawings,

[0084] It can be understood that the setting position and the number of the limiting structure 300 can be selected and adjusted by those skilled in the art. Preferably, the limiting structure 300 is dispersedly arranged in pairs on the outer periphery of the sleeve, or dispersedly arranged in pairs on the pipe segment 600. The limiting structure 300 can be 2, or 3, 4 or more. The plurality of limiting structures 300 can be dispersedly arranged on the fixed end 100.

[0085] As shown in the drawings, Figure 1 and Figure 2 As shown, the two limiting structures 300 are symmetrically arranged on the left and right sides of the fixed end 100. Alternatively, the two limiting structures 300 are symmetrically arranged on the upper and lower sides of the fixed end 100 (as shown in the drawings). Figure 16 As shown in the drawings, Figure 7As shown, the two number of limiting structures 300 can be arranged on the pipe piece 600 along the horizontal (or vertical direction) through the fixing seat 110. Exemplarily, according to the construction needs, three or four or more number of limiting structures 300 can be uniformly arranged on the sleeve or the pipe piece.

[0086] After the installation position and installation mode of the limiting structure 300 of the utility model are described, the specific shape structure of the limiting structure 300 of the utility model will be described below.

[0087] The limiting structure 300 of the utility model comprises: an installation part 310 and a limiting piece 320. At least part of the installation part 310 is installed on the fixed end 100. The limiting piece 320 is connected to the installation part 310. Among them, at least part of the limiting piece 320 can move relative to the installation part 310.

[0088] Regarding the installation part 310, its role is to install and fix the whole limiting structure 300. As shown, Figure 1 As shown, the fixed end 100 of the push tunneling equipment can be a sleeve fixed on the pipe piece 600, and the limiting structure 300 is installed on the outer wall of the sleeve through the installation part 310. As shown, Figure 7 As shown, the fixed end of the push tunneling equipment can also be the pipe piece 600 itself, and the limiting structure 300 is installed on the pipe piece 600 through the installation part 310.

[0089] The installation part 310 can be formed as an installation plate or an installation support, which can be connected with the fixed end through welding, rivet connection, plug-in and the like. It can be understood that the installation part 310 can be fixedly connected with the fixed end 100, or can be movably connected with the fixed end 100.

[0090] Regarding the limiting piece 320, its role is to stop and limit the target object 200. As mentioned above, the target object 200 is generally the main machine of the tunneling machine or the pipe piece to be laid. One end of the limiting piece 320 is connected with the installation part 310 to realize the connection and fixation relative to the fixed end 100, and the other end is formed as a hook-shaped structure and changes the state through opening and closing action. The opening and closing action can be realized through rotation or overturning of the hook-shaped structure. It can be understood that the skilled in the art can leave the space required for rotation or overturning around the head end 320a of the limiting piece 320 according to actual needs.

[0091] It can be understood that the limiting piece 320 can directly switch between the first state and the second state, or indirectly realize the switching between the first state and the second state through one or more intermediate states. For example, the limiting piece 320 can be switched from the first state to the third state, and then switched from the third state to the second state; the limiting piece 320 can be switched from the second state to the third state, and then switched from the third state to the first state.

[0092] The position-limiting member 320 can switch between at least two states including the first state and the second state by changing its position or shape. Since the position of the mounting portion 310 is fixed, the position-limiting member 320 can change its position by rotating or flipping around the mounting portion 310 to switch between the states.

[0093] It can be understood that the at least part of the position-limiting member 320 being movable relative to the mounting portion 310 means that the position-limiting member 320 as a whole is movable relative to the mounting portion 310, and can also include the case where a part of the position-limiting member 320 is movable relative to the mounting portion 310. For example, the position-limiting member 320 can include two parts that are sleeved with each other, and the two parts are movable relative to each other, so that a part of the position-limiting member 320 is movable relative to the mounting portion 310.

[0094] For example, at least part of the position-limiting member 320 is movable relative to the mounting portion 310 by performing at least one of the following actions or a combination thereof: rotating (as shown in Figure 3 and Figure 4 ), flipping (as shown in Figure 1 and Figure 2 ), moving (as shown in Figure 12 and Figure 13 ), and stretching.

[0095] The movable connection between the position-limiting member 320 and the mounting portion 310 can be pin shaft rotation connection, ball hinge torsion connection, sliding rail sliding connection, one-through-hole insertion into the other, and the like. It can be understood that, in the above-mentioned movable connection modes, for example, the pin shaft rotation connection and the ball hinge torsion connection can enable the position-limiting member 320 to rotate or flip relative to the mounting portion 310, so that the position-limiting member 320 changes its posture relative to the mounting portion 310 to switch between the states. In the above-mentioned movable connection modes, for example, the sliding rail sliding connection and the insertion can enable the position-limiting member 320 to move relative to the mounting portion 310, so that the position-limiting member 320 changes its position relative to the mounting portion 310 to stretch relative to the mounting portion 310.

[0096] As mentioned above, the purpose of movably connecting the position-limiting member 320 and the mounting portion 310 mainly includes two kinds. The first kind is to enable the position-limiting member 320 to change its position by moving relative to the mounting portion 310, thereby switching between the first state and the second state. For example, Figure 8 and Figure 9 show a way in which the position-limiting member 320 rotates relative to the mounting portion 310 to switch between the open state and the closed state. This embodiment has the advantages of simple structure and low cost.

[0097] The second purpose of setting the limiting member 320 and the mounting portion 310 in a movable connection is to change the extension length of the limiting member 320 relative to the mounting portion 310 by moving the limiting member 320 relative to the mounting portion 310. For example, Figure 5 、 Figure 7 、 Figure 10 to Figure 13 The scheme of enabling the limiting member 320 to move forward and backward relative to the mounting portion 310 is shown. The advantage of this embodiment is that the extension length of the limiting member 320 is flexible and adjustable. It can be understood that in this case, the limiting member 320 needs to change its own form to realize the switching between the first state and the second state. For example, the limiting member 320 can use the spherical hinge structure shown in Figure 14 and Figure 15 to realize the flipping action shown in Figure 1 and Figure 2 . For another example, the limiting member 320 can use the pin shaft structure shown in Figure 10 and Figure 11 to realize the rotating action shown in Figure 3 and Figure 4 .

[0098] The limiting structure 300 that can achieve the above-mentioned first purpose in the utility model will be described below.

[0099] As shown in Figure 8 and Figure 9 , in some embodiments of the utility model, at least part of the limiting member 320 can rotate relative to the mounting portion 310, thereby realizing the stop limiting of the target object by switching the open and closed states.

[0100] In the case that the limiting member 320 is switched between the open and closed states by rotating around the mounting portion 310, the limiting structure 300 is locked in the following manner. The limiting structure 300 comprises the mounting portion 310 and the limiting member 320. The mounting portion 310 comprises a first mounting portion 311 and a second mounting portion 312. The first mounting portion 311 is riveted to the fixed end 100 and is formed in a flat plate or an arc plate. The second mounting portion 312 is connected to the first mounting portion 311 and protrudes outward relative to the surface of the first mounting portion 311. The second mounting portion 312 comprises two parallel connection plates. The first mounting portion 311 and the second mounting portion 312 are connected by a triangular rib plate, and the two parallel connection plates are connected by a rectangular rib plate. The limiting member 320 comprises a head end 320a and a tail end 320b. The head end 320a is used to limit and stop the target object 200, and the tail end 320b is movably connected to the second mounting portion 312 of the mounting portion 310 by a first pin shaft 330 and is inserted between the two connection plates. A second pin shaft 340 can be reciprocally inserted and removed. Thus, in the case that the limiting structure 300 is arranged in a horizontal direction, the second pin shaft 340 is removed, and the limiting member 320 can rotate around the first pin shaft 330 in the horizontal direction. The second mounting portion 312 formed by the two connection plates can be used as a contact portion, which abuts against the tail end 320b of the limiting member 320 to limit the freedom of movement of the tail end 320b of the limiting member 320 from the top and bottom sides, thereby ensuring that the limiting member 320 is smoothly and stably rotated to open and close, and facilitating the installation and fixation of the first pin shaft 330 and the second pin shaft 340.

[0101] The limiting structure 300 capable of achieving the second purpose will be described below.

[0102] In some embodiments of the present application, the limiting member 320 can move relative to the mounting portion 310 to adjust the extension length of the limiting member 320 relative to the mounting portion 310. Specifically, the limiting member 320 can extend or retract relative to the mounting portion 310 by moving relative to the mounting portion 310, so as to adjust the extension length of the limiting member 320 relative to the mounting portion 310.

[0103] Thus, in different construction environments or construction requirements, if the size of the target object 200 to be pushed changes, the extension length of the limiting member 320 relative to the mounting portion 310 can be adjusted to adapt to different target objects 200. Therefore, the limiting member 320 of the present application can be used to stop different sizes of target objects 200, and when the type or size of the target object 200 changes, different limiting structures are no longer needed, and only the extension length of the limiting member 320 needs to be adjusted. Therefore, the present application can simplify the construction process of the push-pull tunneling equipment in tunnel construction and improve the construction efficiency.

[0104] The limiting piece 320 is preferably adjusted in a linear reciprocating movement relative to the mounting portion 310. The limiting structure 300 further comprises a telescopic driving mechanism for driving the limiting piece 320 to move. The telescopic mechanism is an automatic telescopic driving mechanism or a manual telescopic driving mechanism. The automatic telescopic driving mechanism has the advantages of easy control and accurate stroke. The manual telescopic driving mechanism has the advantages of relatively low cost and simple structure.

[0105] Preferably, as shown in Figure 10 and 11 The tail end 320b of the limiting piece 320 penetrates the through hole 312a and can move back and forth along the axis of the through hole 312a.

[0106] The advantage of the above method is that the tail end 320b penetrating the through hole 312a can be supported and limited by the mounting portion 310. During the telescopic movement of the tail end 320b relative to the mounting portion 310, the travel direction of the tail end 320b is limited by the through hole 312a, and it is not easy to be affected by the weight and deviate from the travel trajectory. Therefore, the way of connecting the tail end 320b and the mounting portion 310 through the through hole 312a can ensure the relative stable telescopic movement of the limiting piece 320 with a relatively simple structure.

[0107] Preferably, a matching structure that can contact each other is arranged on the limiting piece 320 and the mounting portion 310, or part of the structure of the mounting portion 310 is arranged to be symmetrical on both sides, and part of the structure of the limiting piece 320 is inserted between the corresponding symmetrical structures of the mounting portion 310, so that the mounting portion 310 can clamp the limiting piece 320. Therefore, it is helpful to keep the limiting piece 320 stable during the telescopic movement relative to the mounting portion 310.

[0108] It can be understood that in the prior art, there are various power supply elements and movement modes for driving target components to move. For example: the utility model can adopt an automatic telescopic driving mechanism such as an oil cylinder, an electric cylinder, a motor, an electric push rod, etc. to realize the driving of the limiting piece 320. The limiting piece 320 and the automatic telescopic driving mechanism can be connected through a transmission structure. For example, gear and rack, ball screw, belt, cam, etc. structures that can convert rotary motion into linear motion can be used to realize transmission.

[0109] Preferably, an oil cylinder can be used as a telescopic driving mechanism, and the oil cylinder is directly connected with the limiting piece 320. Since the limiting piece 320 is movably connected with the mounting portion 310, the telescopic movement of the oil cylinder can directly drive the limiting piece 320 to move relative to the mounting portion 310.

[0110] For the movable connection between the limiting piece 320 and the mounting portion 310, it can be ensured that the limiting piece 320 can be connected with the mounting portion 310 and can move relative to the mounting portion 310. For example, a sliding rail can be arranged on the mounting portion 310, and a sliding block can be arranged on the limiting piece 320, and the two are in sliding connection, so that the limiting piece 320 can slide relative to the mounting portion 310 along the sliding rail under the drive of the telescopic drive mechanism.

[0111] Regarding the manual telescopic drive mechanism, it refers to a telescopic drive mechanism that is driven to move the limiting piece 320 by an operator directly or with the help of a tool. For example, the operator can drive the limiting piece 320 to move linearly by rotating the manual telescopic drive mechanism through a wrench.

[0112] As described above, the manual telescopic drive mechanism has the advantages of low cost and small structure, therefore, the utility model exemplarily designs a manual telescopic drive mechanism that can be rotated through the following technical solutions.

[0113] As shown in Figure 12 and Figure 13 , the limiting structure 300 further comprises a rotating portion 350 arranged at the tail end 320b. The rotating portion 350 is used for inserting a rotating tool to drive the tail end 320b to move forward and backward along the axis of the through hole 312a by rotating at least part of the rotating portion 350. The rotating mode for driving the limiting piece 320 to move can facilitate relatively accurate control of the movement stroke of the limiting piece 320.

[0114] Specifically, as shown in Figure 12 and Figure 13 , the rotating portion 350 comprises a rotatable ring nut 352 arranged at the tail end 320b and threadedly connected with the tail end 320b. The ring nut 352 drives the tail end 320b to move forward and backward along the axis of the through hole 312a by rotating.

[0115] The ring nut 352 is arranged outside the outer periphery of the tail end 320b and has an internal thread. The tail end 320b has an external thread at a position corresponding to the ring nut 352. Thus, the ring nut 352 can drive the tail end 320b to move by rotating.

[0116] Preferably, as shown in Figure 12 and Figure 13 , the rotating portion 350 further comprises a sleeve 351 arranged outside the ring nut 352 and connected with the mounting portion 310, and the sleeve 351 has an opening 351a. The ring nut 352 can rotate within the sleeve 351.

[0117] Specifically, the mounting portion 310 comprises an abutting portion 312b, the ring nut 352 abuttingly contacts the abutting portion 312b, so that the abutting portion 312b provides the ring nut 352 with a counterforce required for screwing. The position of the opening 351a is used for inserting a screwing tool, so that an operator rotates the ring nut 352 using the screwing tool. Exemplarily, the screwing tool can be a wrench.

[0118] Preferably, as shown in Figure 12 and Figure 13 , the ring nut 352 has one or more screwing tool insertion holes 352a corresponding to the position of the opening 351a. Thus, a more compact screwing tool such as an internal hexagonal wrench can be used to rotate the ring nut 352.

[0119] As mentioned above, if the limiting member 320 can move relative to the mounting portion 310 to adjust the extension length of the limiting member 320 relative to the mounting portion 310, when the type or size of the target object 200 changes, it is no longer necessary to replace different limiting structures, but only to adjust the extension length of the limiting member 320. Since the limiting member 320 needs to change its position or posture to stop the target object 200, the limiting member 320 needs to be movably connected with the mounting portion 310 by a pin shaft, a hinge, a ball hinge or the like (such as the pin shaft connection shown in Figure 8 and Figure 9 ). In this case, it is also feasible to make the limiting member 320 not only reciprocate back and forth relative to the mounting portion 310, but also rotate or flip open and close relative to the mounting portion 310. For example, the limiting member 320 is connected with the mounting portion 310 by a slide rail and a slide block, and a ball hinge structure is arranged at the slide block, so that the limiting member 320 can twist around the slide block. However, such a structure is relatively complex.

[0120] Therefore, as shown in Figure 5 to Figure 7 , and Figure 10 and Figure 11 , in order to simplify the structure and take into account the stability of state switching, the utility model designs the limiting member 320 to comprise a head end 320a and a tail end 320b movably connected with each other. The head end 320a changes the position and posture relative to the tail end 320b, so that the limiting member 320 switches between at least two states. The tail end 320b is movably connected with the mounting portion 310, and adjusts the extension length of the limiting member 320 relative to the mounting portion 310 by moving relative to the mounting portion 310.

[0121] In other words, the limiting piece 320 of the utility model preferably separates the head end 320a and the tail end 320b and connects them movably. The tail end 320b is movably connected with the mounting part 310, so that the tail end 320b can move forward and backward relative to the mounting part 310. The head end 320a for limiting and stopping the target object 200 can change the position (such as rotation or overturning) relative to the tail end 320b to switch between the first state and the second state. It can be understood that the head end 320a needs to change the position, so it needs to be movably connected with the tail end 320b. For example, the head end 320a and the tail end 320b are connected by a pin shaft, a hinge or a ball hinge.

[0122] In the above manner, the limiting piece 320 can be moved forward and backward as a whole. When moved to a suitable position, the head end 320a which is separately arranged with the tail end 320b and movably connected can be bent or twisted relative to the tail end 320b to stop or avoid the target object 200. The above structure is simple, low in cost and can effectively stop the target object 200.

[0123] In addition to avoiding the movement or displacement of the target object 200 which is pushed by the soil pressure, another advantage of separating the head end 320a and the tail end 320b and switching the opening and closing state by the movement of the head end 320a relative to the tail end 320b is that it is convenient to repair and maintain, and the cost and efficiency are lower during repair and maintenance.

[0124] Specifically, assuming that the mounting part 310 and the limiting piece 320 of the limiting structure 300 are movably connected (such as pin shaft connection or ball hinge connection), the limiting piece 320 as a whole can also lock the target object 200 if it changes the position or posture relative to the fixed mounting part 310. For example, as shown in FIG. 6, the limiting piece 320 is connected with the mounting part 310 by a pin shaft, and the head end 320a is connected with the tail end 320b by a pin shaft. When the limiting piece 320 is in the first state, the head end 320a is in the state of being parallel to the tail end 320b. When the limiting piece 320 is in the second state, the head end 320a is in the state of being perpendicular to the tail end 320b. Figure 8 and Figure 9As shown, the limiting part 320 is rotationally connected with the second mounting part 312 of the mounting part 310 through the first pin shaft 330, and when the second pin shaft 340 is inserted, the limiting part 320 can be locked. After the second pin shaft 340 is pulled out, the limiting part 320 can rotate around the mounting part 310. Since the position of the movable connection is prone to wear and damage, the limiting structure 300 will have the need for maintenance and replacement. If the above-mentioned way is used to realize the limiting locking, when the damage occurs at the position of the movable connection between the mounting part 310 and the limiting part 320, the mounting part 310 and the limiting part 320 need to be replaced at the same time, which increases the cost of maintenance and maintenance. In addition, since the mounting part 310 is fixedly mounted, the way to realize the fixed mounting is usually welding, riveting and the like. The replacement of the mounting part 310 is relatively complex and troublesome. Therefore, compared with the technical solution that the mounting part 310 and the limiting part 320 of the limiting structure 300 are arranged to be movably connected to realize opening and closing, the utility model also connects the limiting structure 300 with the mounting part 310 through the tail end 320b thereof, and arranges the head end 320a to be movably connected with the tail end 320b, so that the limiting structure 300 realizes state switching through the morphological change thereof. When wear and damage occur at the position of the movable connection, only the limiting part 320 or part of the limiting part 320 needs to be replaced, so that the maintenance can be completed, the cost of maintenance and maintenance is lower, and the required process is simple and efficient.

[0125] Preferably, the head end 320a and the tail end 320b can be arranged to be connected with each other in a detachable manner. The ways to realize detachable connection include bolt and nut connection, pin shaft connection, buckle connection and the like. The advantage of arranging the head end 320a and the tail end 320b to be detachably connected is that the maintenance and replacement of the corresponding parts of the head end 320a and / or the tail end 320b can be further facilitated.

[0126] It can be understood that for the limiting structure 300, the self-weight of the target object 200 or the force acting on the limiting structure 300 can facilitate the relative fixation of the limiting structure 300 when the limiting structure 300 is in the first state. However, preferably, the limiting structure 300 can be further provided with a locking structure to ensure that the limiting structure 300 can be fixed in the first state, thereby improving the stability of the limiting and locking of the target object 200.

[0127] As shown in Figure 5 to Figure 7 , Figure 10 and Figure 11 , in the case that the limiting part 320 adjusts the length by extending and retracting relative to the mounting part 310, and realizes the state switching of opening and closing by rotating the head end 320a relative to the tail end 320b, the limiting structure 300 further comprises a locking part for locking the head end 320a relative to the tail end 320b, so that the limiting part 320 remains in the first state.

[0128] Exemplarily, the locking member can be arranged at the joint of the head end 320a and the tail end 320b, and the locking member can realize the relative fixation of the head end 320a and the tail end 320b by means of frictional braking, elastic locking, clamping locking or the like. Of course, in addition to mechanical locking, hydraulic locking, pneumatic locking, electromagnetic locking or the like can also be adopted to realize the relative fixation of the head end 320a and the tail end 320b.

[0129] Under the premise of ensuring the stability of locking, the needs of simplifying the structure and reducing the cost are taken into account, and the head end 320a and the tail end 320b are preferably connected by a pin shaft structure to realize the relative fixation of the two.

[0130] Exemplarily, as shown in Figure 10 and Figure 11 , the limiting structure 300 of the utility model further includes: a first pin shaft 330 and a second pin shaft 340. The first pin shaft 330 penetrates the head end 320a and the tail end 320b to rotatably connect the two. The second pin shaft 340 can be plugged and unplugged relative to the head end 320a and the tail end 320b to lock the two, so that the limiting structure 300 remains in the first state.

[0131] Specifically, the head end 320a and the tail end 320b are respectively provided with position corresponding through holes, the first pin shaft 330 penetrates the head end 320a and the tail end 320b, and the head end 320a can rotate relative to the tail end 320b around the first pin shaft 330 to realize state switching. It can be understood that in order to keep the head end 320a in the first state, the head end 320a and the tail end 320b are also respectively provided with another pair of position corresponding through holes, the second pin shaft 340 penetrates the other pair of through holes of the head end 320a and the tail end 320b, and can be plugged and unplugged in the other pair of through holes. Thus, when the second pin shaft 340 is in the inserted state, the head end 320a and the tail end 320b are relatively fixed. When the second pin shaft 340 is in the pulled-out state, the head end 320a can rotate relative to the tail end 320b around the first pin shaft 330.

[0132] In addition to the pin shaft connection, the utility model can also adopt the following spherical hinge connection mode to movably connect the head end 320a and the tail end 320b. It can be understood that the pin shaft connection mode enables the head end 320a to rotate relative to the tail end 320b around a specific plane. Thus, the two limiting structures 300 arranged oppositely can realize locking and opening by relative opening and closing. The difference between the spherical hinge connection and the pin shaft connection lies in that the rotation direction of the spherical hinge connection is not limited. For example, as shown in Figure 1 and Figure 2As shown, the two oppositely arranged limiting structures 300 can be respectively flipped to realize locking and opening. Each limiting structure 300 can be flipped in the same direction or in different directions.

[0133] As shown in the drawings, the head end 320a can be provided with a convex surface, and the tail end 320b can be provided with a concave surface. The head end 320a and the tail end 320b are matched in concave-convex at the connection to enable the head end 320a to rotate relative to the tail end 320b. The above-mentioned ball hinge connection makes the movement of the limiting structure 300 not easily restricted by space. In a construction environment, if it is blocked or encounters an obstacle, it can be adjusted by adjusting the flipping direction and changing the movement path to realize locking and opening. Therefore, the connection mode of the ball hinge makes the application scenario of the limiting structure 300 less restricted, and the locking or avoiding path is more flexible. Figure 14 Figure 15 As shown in the drawings, the head end 320a can be provided with a convex surface, and the tail end 320b can be provided with a concave surface. The head end 320a and the tail end 320b are matched in concave-convex at the connection to enable the head end 320a to rotate relative to the tail end 320b. The above-mentioned ball hinge connection makes the movement of the limiting structure 300 not easily restricted by space. In a construction environment, if it is blocked or encounters an obstacle, it can be adjusted by adjusting the flipping direction and changing the movement path to realize locking and opening. Therefore, the connection mode of the ball hinge makes the application scenario of the limiting structure 300 less restricted, and the locking or avoiding path is more flexible.

[0134] It can be understood that one side of the head end 320a is formed as a ball head, and one side of the tail end 320b is formed as a spherical surface. They can form a self-locking ball hinge structure through interference fit or elastic deformation. In order to ensure the connection strength of the two, preferably, the limiting structure 300 further comprises a bolt 370, which connects the head end 320a and the tail end 320b at the connection. The head end 320a can rotate relative to the tail end 320b around the bolt 370.

[0135] It can be understood that the utility model provides an embodiment of the head end 320a and the tail end 320b driven by the screwing part 350 to move together in the drawings, and also provides an embodiment of the head end 320a and the tail end 320b driven by the oil cylinder to move together. Based on this, those skilled in the art can know the embodiment of the head end 320a and the tail end 320b driven by the screwing part 350 to move together, and the embodiment of the head end 320a and the tail end 320b driven by the oil cylinder to move together.

[0136] ​The above describes the movement and extension mode of the limiting piece 320 relative to the mounting piece 310, and also describes the rotation mode of the limiting piece 320 relative to the mounting piece 310. It can be understood that, in the process of movement or rotation or extension or movement of the limiting piece 320, the freedom of movement of the limiting piece 320 is preferably limited to ensure that the limiting piece 320 can move stably, thereby protecting the limiting piece 320 and avoiding dislocation or deviation from the target movement track during movement. Therefore, the utility model sets a contact part on the mounting part 310, which is used for abutting contact with the limiting piece 320 to limit the freedom of movement of the limiting piece 320 relative to the mounting part 310. The contact part enables the limiting piece 320 to move relative to the mounting part 310 only in a specific direction or angle, achieving the purpose of protecting the limiting piece.

[0137] Preferably, the contact part is symmetrically arranged on opposite sides of the limiting piece 320 to abut and limit the limiting piece 320 from opposite sides, ensuring that the limiting piece 320 can stably reciprocate along a certain specific plane (such as a horizontal plane) or in a certain specific direction (such as a straight line direction).

[0138] Exemplarily, the contact part and the limiting piece 320 can be in surface contact, line contact or point contact. Among them, the above contact modes can all achieve the purpose of limiting the freedom of movement of the limiting piece 320. Among them, in the case that the limiting piece 320 can move or rotate relative to the mounting part 310, the surface contact mode is preferably adopted to improve the stability of movement or rotation of the limiting piece 320.

[0139] Preferably, at least part or all of the contact part can move to approach or move away from the limiting piece 320. Thus, by moving at least part or all of the contact part to approach the limiting piece 320, the contact part and the limiting piece 320 can be more closely in abutting contact, and by moving at least part or all of the contact part away from the limiting piece 320, the close degree of abutting contact between the contact part and the limiting piece 320 can be reduced, or the contact part and the limiting piece 320 can no longer be in contact with each other. The above mode enables the operator to adjust the limiting degree of the freedom of movement of the limiting piece 320 by the contact part according to actual needs. If necessary, the contact part can also be adjusted to avoid the limiting piece 320 to facilitate maintenance or replacement of the limiting piece 320.

[0140] In some embodiments of the utility model, the mounting part 310 includes a first mounting part 311 and a second mounting part 312. The first mounting part 311 is mounted on the fixed end 100. The second mounting part 312 is connected with the first mounting part 311 and protrudes outward relative to the surface of the first mounting part 311. Among them, the limiting piece 320 is movably connected with the second mounting part 312, and at least part or all of the second mounting part 312 forms the contact part.

[0141] Specifically, with Figure 8 and 9 Taking the embodiment where the limiting member 320 rotates relative to the mounting portion 310 as an example, the first mounting portion 311 is formed as a flat plate structure or an arc-shaped structure that fits against the fixed end 100. For example, when the fixed end 100 is a sleeve, the first mounting portion 311 can be formed as an arc-shaped plate to fit against the outer wall of the sleeve. As another example, when the pipe segment 600 is used as the fixed end, a construction plane can be provided or built on the concave surface of the pipe segment 600. The first mounting portion 311 can be a flat plate structure that fits against the construction plane by filling and reinforcing the concave surface of the pipe segment 600. The function of the second mounting portion 312 is to support the limiting member 320, therefore it needs to protrude outward relative to the surface of the first mounting portion 311. The second mounting portion 312 includes two connecting plates arranged parallel to each other, both of which protrude outward relative to the surface of the first mounting portion 311. The two connecting plates form a contact portion for abutting against the limiting member 320 to restrict the degree of freedom of rotation of the limiting member 320 relative to the mounting portion 310, so that the limiting member 320 rotates stably along the fixed plane.

[0142] by Figure 10 to Figure 13 Taking the embodiment where the limiting member 320 moves back and forth relative to the mounting part 310 as an example, the contact part is used to limit the direction of movement of the head end 320a relative to the tail end 320b, so as to ensure that the head end 320a can open and close stably.

[0143] The second mounting portion 312 includes a connecting portion 312b and an abutting portion 312c. The connecting portion 312b is formed as a protrusion relative to the first mounting portion 311, and its shape can be a square plate, a polygonal plate, a circular plate, or any other shape. The connecting portion 312b is connected to the first mounting portion 311. The abutting portion 312c is connected to either the connecting portion 312b or the first mounting portion 311, or to both. The limiting member 320 abuts against the abutting portion 312c in the second mounting portion 312, so that the abutting portion 312c supports and limits the limiting member 320. A through hole 312a is provided on the connecting portion 312b, and the limiting member 320 passes through the through hole 312a. Therefore, the limiting member 320 is not only supported and fixed by the through hole 312a, but can also reciprocate back and forth along the axis of the through hole 312a.

[0144] In this case, since the limiting member 320 moves in a straight line relative to the mounting part 310, two abutting parts 312c can be symmetrically arranged on opposite sides of the limiting member 320 and abut against the limiting member 320 respectively, thereby stopping and limiting the limiting member 320 from opposite sides, ensuring that its movement trajectory is always along a straight line and is not easy to deflect or twist.

[0145] Preferably, the abutting part 312c comprises a support plate 312c1 and an abutting nail 312c2. The support plate 312c1 is connected with the first mounting part 311 and / or the connecting part 312b. The abutting nail 312c2 penetrates through the support plate 312c1 and is used to abut against the limiting part 320. The abutting nail 312c2 is movable relative to the support plate 312c1 to approach or move away from the limiting part 320.

[0146] It can be understood that a through hole is arranged on the abutting part 312c, and the abutting nail 312c2 penetrates through the abutting part 312c through the through hole. The through hole on the abutting part 312c has an internal thread, and the outer wall of the abutting nail 312c2 has an external thread. The abutting nail 312c2 is movable relative to the abutting part 312c by rotating to adjust the tightness of clamping the limiting part 320, so as to ensure that the limiting part 320 moves smoothly and stably. The number of the abutting nails 312c2 can be one or more.

[0147] Preferably, the tail end 320b has a second abutting part 321, and the head end 320a has a first abutting part 322. The head end 320a and the tail end 320b are in contact with each other through the first abutting part 322 and the second abutting part 321. The first abutting part 322 can be formed as a flat plate structure, and the second abutting part 321 has a flat surface to realize the surface contact of the two. The abutting nail 312c2 is in contact with the first abutting part 322.

[0148] Further preferably, the head end 320a comprises two first abutting parts 322, the tail end 320b comprises a second abutting part 321 arranged between the two first abutting parts 322, the first pin shaft 330 and the second pin shaft 340 respectively penetrate through the first abutting part 322 and the second abutting part 321, and the first abutting part 322 and the second abutting part 321 abut against each other. The abutting nail 312c2 is in contact with the first abutting part 322. The above structure ensures that the head end 320a and the tail end 320b remain stable during relative movement.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some technical features. These modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A top-push tunneling machine, characterized in that, The top-pushing tunneling equipment includes: A pushing end, which is used to connect to a fixed end (100) and push the target (200) relative to the fixed end (100); One or more limiting structures (300) are mounted on the fixed end (100) and are switchable in at least two states, including a first state and a second state. In the first state, the limiting structure (300) stops the target object (200) to restrict the movement of the target object (200) relative to the fixed end (100), and in the second state, the limiting structure (300) avoids the target object (200).

2. The top-pushing tunneling equipment according to claim 1, characterized in that, The top-pushing tunneling equipment also includes the fixed end (100), which is a starting sleeve.

3. The top-pushing tunneling equipment according to claim 1, characterized in that, The top-pushing tunneling equipment also includes the fixed end (100) and the starting sleeve (400), wherein the fixed end (100) is a fixed sleeve sleeved outside the starting sleeve (400).

4. The top-pushing tunneling equipment according to claim 1, characterized in that, The limiting structure (300) is fixedly installed on the fixed end (100); or The limiting structure (300) is movably mounted on the fixed end (100).

5. The top-pushing tunneling equipment according to claim 1, characterized in that, Two of the limiting structures (300) are symmetrically arranged on the left and right sides of the fixed end (100); or Two of the limiting structures (300) are symmetrically arranged on the upper and lower sides of the fixed end (100); or Multiple limiting structures (300) are distributed at the fixed end (100).

6. The top-pushing tunneling equipment according to claim 1, characterized in that, The fixed end (100) is a pipe segment, wall, or soil.

7. The top-pushing tunneling equipment according to claim 6, characterized in that, The top-pushing tunneling equipment also includes: One or more fixing seats (110) are fixedly connected to the fixing end (100); The limiting structure (300) is mounted on at least a portion of the fixing base (110).

8. The top-pushing tunneling equipment according to claim 1, characterized in that, The fixed end (100) is an arc-shaped tube segment, the concave surface of the tube segment has a platform structure (610), and the limiting structure (300) is installed on the platform structure (610).

9. The top-pushing tunneling equipment according to any one of claims 1 to 8, characterized in that, The limiting structure (300) includes: Mounting part (310), at least a portion of which is mounted on the fixed end (100); A limiting member (320) is connected to the mounting part (310); At least a portion of the limiting member (320) is movable relative to the mounting portion (310).

10. The top-pushing tunneling equipment according to claim 9, characterized in that, At least a portion of the limiting member (320) moves relative to the mounting portion (310) by performing at least one or a combination of the following actions: rotation, flipping, moving, and extension / retraction.

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