Retaining hook and pushing tunneling equipment

Abstract

The utility model provides a retaining hook and pushing tunneling equipment. The retaining hook comprises a mounting part and a locking part, wherein the mounting part is used for mounting and fixing the retaining hook; the limiting part is movably connected with the mounting part, the limiting part can be switched between at least two states including a first state and a second state, and the limiting part stops the target object in the first state and avoids the target object in the second state; wherein the mounting part is provided with a contact part, and the contact part abuts against and makes contact with the limiting piece so as to limit the freedom degree of movement of the limiting piece relative to the mounting part. The technical problem that in the prior art, a limiting and retaining structure cannot be stably switched between an opening state and a closing state can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, specifically, relates to a retreat hook and push driving equipment. BACKGROUND

[0002] The push driving equipment is a commonly used equipment in tunnel construction. For example, when the tunnel is constructed by mechanical method, the push driving and laying of bypass channel (for example, the connection channel of subway) are often involved. Taking the connection channel as an example, in the construction, the pre-supporting trolley is opened, and the trolley is supported on the inner wall of the tunnel in the upward, downward, left and right directions, and the counterforce structure of the push driving equipment is supported on the main tunnel segment on the opposite side of the starting direction, so as to bear the thrust as the back of the push driving equipment. Further, the push driving equipment can push the main machine of the driving equipment and / or the segment to be laid forward to carry out the construction.

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

[0004] As mentioned above, the push driving equipment needs to provide the counterforce through the counterforce structure to push the target object forward. In tunnel construction, such target objects are generally the main machine of the driving machine or the segment to be laid. The target object as the push target will bear the pressure from the soil, so that the target object tends 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 to be pushed due to the pressure of the soil. The prior art generally uses the retreat hook to limit and stop the target object. The technical problem to be solved in the prior art is how to ensure that the retreat hook can be stably switched between the open and closed states. SUMMARY

[0005] Therefore, the utility model provides a retreat hook and push driving equipment to solve the technical problem that the limiting and stopping structure in the prior art is difficult to be stably switched between the open and closed states.

[0006] To solve the above problems, the utility model provides a retreat hook, which comprises: a mounting part for mounting and fixing the retreat hook; a limiting part movably connected with the mounting part, the limiting part can be switched between at least two states including a first state and a second state, the limiting part stops the target object in the first state and avoids the target object in the second state; wherein the mounting part has a contact part, the contact part is in contact with the limiting part to limit the freedom of movement of the limiting part relative to the mounting part.

[0007] In any of the above technical solutions, the contact portions are symmetrically arranged on opposite sides of the limiting member.

[0008] In any of the above technical solutions, the contact portions are in surface contact, line contact or point contact with the limiting member.

[0009] In any of the above technical solutions, at least part or all of the contact portions are movable to approach or move away from the limiting member.

[0010] In any of the above technical solutions, the mounting portion comprises: a first mounting portion mounted to the fixed end; a second mounting portion connected to the first mounting portion and protruding outward relative to the surface of the first mounting portion; wherein the limiting member is movably connected to the second mounting portion, and at least part or all of the second mounting portion forms the contact portion.

[0011] In any of the above technical solutions, the second mounting portion comprises: a connecting portion connected to the first mounting portion, the connecting portion being provided with a through hole, and the limiting member penetrating through the through hole; and an abutting portion connected to the first mounting portion and / or the connecting portion; wherein two abutting portions are symmetrically arranged on opposite sides of the limiting member and abut against the limiting member.

[0012] In any of the above technical solutions, the abutting portion comprises: a support plate connected to the first mounting portion and / or the connecting portion; and an abutting nail penetrating through the support plate and used for abutting against the limiting member; wherein the abutting nail is movable relative to the support plate to approach or move away from the limiting member.

[0013] In any of the above technical solutions, the limiting member is also movable relative to the mounting portion to adjust the protruding length of the limiting member relative to the mounting portion, and the contact portion is used for limiting the movement direction of the limiting member relative to the mounting portion.

[0014] In any of the above technical solutions, the limiting member comprises a head end and a tail end, the head end is movable relative to the tail end to switch the limiting member between at least two states, and the contact portion is used for limiting the movement direction of the head end relative to the tail end.

[0015] The utility model also provides a kind of push advancing equipment, and push advancing equipment includes: target object;Push end, push end is used to push target object relative to fixed end;One or more any of the above technical solutions of stop hook, stop hook is installed in fixed end, and is used to stop target object.

[0016] Beneficial effects

[0017] The retreat-preventing hook is used for the jacking and tunneling equipment, which comprises a mounting portion and a limiting piece. The mounting portion is used for mounting and fixing the retreat-preventing hook. The limiting piece is movably connected with the mounting portion. The limiting piece can be switched among at least two states including a first state and a second state. The limiting piece stops the target object in the first state and avoids the target object in the second state. In order to ensure that the limiting piece can be switched stably and to ensure that the limiting piece can more stably limit and stop the target object in the first state, the utility model sets a contact portion on the mounting portion, and the contact portion is used for abutting and contacting with the limiting piece. Thus, the contact portion can limit the freedom of the limiting piece relative to the mounting portion, so that the limiting piece can only move relative to the mounting portion along a specific direction or angle, thereby avoiding the dislocation or deviation of the limiting piece from the activity track of the target object in the process of movement, and achieving the purpose of protecting the limiting piece. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The jacking and tunneling equipment (perspective view - pin shaft rotating opening and closing type - first state) of the first embodiment of the utility model;

[0019] Figure 2 The jacking and tunneling equipment (perspective view - pin shaft rotating opening and closing type - first state) of the first embodiment of the utility model; Figure 1 The partial enlarged view of the middle C part;

[0020] Figure 3 The moving principle schematic view of the jacking and tunneling equipment of the first embodiment of the utility model;

[0021] Figure 4 The jacking and tunneling equipment (perspective view - pin shaft rotating opening and closing type - first state) of the first embodiment of the utility model; Figure 3 The partial enlarged view of the middle A part;

[0022] Figure 5 The jacking and tunneling equipment (length fixed - perspective view) of the second embodiment of the utility model;

[0023] Figure 6 The jacking and tunneling equipment (length fixed - perspective view) of the second embodiment of the utility model; Figure 5 The partial enlarged view of the middle D part;

[0024] Figure 7 The jacking and tunneling equipment (perspective view - pin shaft rotating opening and closing type - first state) of the first embodiment of the utility model;

[0025] Figure 8 The jacking and tunneling equipment (perspective view - pin shaft rotating opening and closing type - first state) of the first embodiment of the utility model;

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] Fixed end: 100; mounting seat: 110; target object: 200; retreat prevention hook: 300; mounting portion: 310; first mounting portion: 311; second mounting portion: 312; through hole: 312a; connecting portion: 312b; abutting portion: 312c; support plate: 312c1; abutting nail: 312c2; notch: 312c3; limiting piece: 320; head end: 320a; tail end: 320b; second abutting piece: 321; first abutting piece: 322; first pin shaft: 330; second pin shaft: 340; twisting portion: 350; sleeve: 351; opening: 351a; ring sleeve: 352; twisting tool insertion hole: 352a; pipe piece: 600. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] The utility model provides a kind of retreat prevention hook, which is used in push-jacking equipment. Push-jacking equipment is 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 channels (such as the communication channels of the subway). Taking the communication channel as an example, it needs to be opened in the starting process during construction, supported in various directions of up, down, left and right on the tunnel inner wall, and the counterforce structure of the push-jacking 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-jacking equipment. Further, the push-jacking equipment can push the main machine of the excavation equipment and / or the segment to be laid forward to carry out construction.

[0030] For the basic structure and working principle of the push-jacking 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.

[0031] It can be understood that, in addition to bypass channel construction, push-jacking equipment also has many other application scenarios in tunnel construction. It can be used for lateral pushing, and also for longitudinal or inclined pushing. In addition to subway construction, push-jacking equipment also has wide application prospects in the fields of underground pipeline laying, municipal pipe gallery construction, mining and excavation, etc.

[0032] In tunnel boring machine (TBM) systems, the reaction force provided by a reaction structure propels the target object forward. In tunnel construction, the reaction structure is typically a reaction frame, and the target object is usually the main unit of the TBM or the tunnel segments to be laid. The reaction structure is connected to the fixed end of the TBM via a structure such as a tie rod. The fixed end is usually the sleeve of the TBM, but it can also be a tunnel segment or soil. Because the reaction structure is connected to the fixed end, the reaction cylinders on the reaction structure, when providing the jacking force, can push the target object forward, thus achieving tunnel excavation and tunnel segment laying.

[0033] by Figure 7 For example, the reaction structure is located in Figure 7 The right-hand position (not shown in the figure). The reaction structure is connected to the fixed end, which can be segment 600. The reaction structure is along... Figure 7 From right to left, the target object 200 is pushed to the left; the target object 200 is the main unit of the jacking tunneling equipment. Figure 7 As indicated by the direction of the middle arrow, the target object 200, which is being pushed, will be subjected to pressure from the soil, causing it to tend to move in the direction of the reaction structure after being subjected to force. Therefore, it is essential to prevent the target object 200 from moving or shifting due to soil pressure.

[0034] The structure that achieves the purpose of stopping and limiting the target object can be called a "stop hook". This type of stop hook can be fixed to a fixed end, and the target object can be stopped or avoided by opening and closing the hook-shaped stop hook. However, the shortcoming of the prior art is that when the stop hook opens and closes by changing its own position or shape, it is difficult to switch stably between the open and closed states because it lacks a degree of freedom limiting element.

[0035] Therefore, this utility model provides an anti-reverse hook. For example... Figure 1 As shown, the anti-reverse hook 300 includes a mounting portion 310 and a limiting member 320. The mounting portion 310 is used to install and fix the anti-reverse hook 300. The limiting member 320 is movably connected to the mounting portion 310 and can switch between at least two states, including a first state and a second state. In the first state, the limiting member 320 stops the target object 200, and in the second state, it avoids the target object 200. The mounting portion 310 has a contact portion that abuts against the limiting member 320 to restrict the degree of freedom of movement of the limiting member 320 relative to the mounting portion 310.

[0036] The function of the mounting part 310 is to install and secure the entire anti-reverse hook 300. For example... Figure 1 As shown, the fixed end 100 of the top-pushing tunneling equipment can be a sleeve fixed to the pipe or soil, and the anti-reverse hook 300 is installed on the outer wall of the sleeve. Figure 7As shown, the fixed end of the pushing and excavating device can also be the pipe segment 600 itself, and the retreat-preventing hook 300 is mounted on the pipe segment 600. The mounting portion 310 can be formed as a mounting plate or a mounting bracket, which can be connected with the fixed end by welding, rivet connection, insertion, or the like. It can be understood that the mounting portion 310 can be fixedly connected with the fixed end, or can be movably connected with the fixed end.

[0037] Regarding the limiting member 320, the function thereof is to stop and limit the target object 200. As mentioned above, the target object 200 is generally the main machine of the excavating machine or the pipe segment to be laid. One end of the limiting member 320 is connected and fixed relative to the fixed end 100 by being connected with the mounting portion 310, and the other end is formed as a hook-shaped structure and changes the state by opening and closing action. The opening and closing action can be realized by rotation or overturning of the hook-shaped structure.

[0038] It can be understood that the limiting member 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 member 320 can be switched from the first state to the third state, and then switched from the third state to the second state; or the limiting member 320 can be switched from the second state to the third state, and then switched from the third state to the first state.

[0039] As shown, Figure 1 The limiting member 320 can be arranged on the left and right opposite sides of the target object 200, and stops and limits the target object 200 in the first state, and is opened by relatively rotating in the horizontal direction to switch to the second state. The limiting member 320 avoids the target object 200 in the second state.

[0040] It can be understood that the arrangement position and the arrangement number of the retreat-preventing hook 300 can be selected and adjusted by those skilled in the art. Preferably, the retreat-preventing hook 300 is arranged in pairs and dispersed on the outer periphery of the sleeve, or arranged in pairs and dispersed on the pipe segment. The number of the retreat-preventing hook 300 can be 2, or 3, 4, or more.

[0041] Exemplarily, as shown, Figure 1 The two retreat-preventing hooks 300 can be arranged in pairs on the sleeve in the horizontal (or vertical) direction.

[0042] Exemplarily, as shown, Figure 7 The two retreat-preventing hooks 300 can be arranged on the pipe segment 600 in the horizontal (or vertical) direction through the fixing seat 110. The fixing seat 110 is a reinforced concrete embedded block (also referred to as an anchor block).

[0043] Exemplarily, according to the construction needs, three retreat-preventing hooks 300 can be uniformly arranged on the sleeve or the pipe segment.

[0044] The movable connection between the limiting member 320 and the mounting portion 310 can be pin shaft rotation connection, ball hinge torsion connection, sliding rail sliding connection, active through hole insertion and the like. It can be understood that in the above movable connection modes, for example, the pin shaft rotation connection and the ball hinge torsion connection can enable the limiting member 320 to rotate or overturn relative to the mounting portion 310, so that the limiting member 320 realizes state switching by changing the posture relative to the mounting portion 310. In the above movable connection modes, for example, the sliding rail sliding connection and the active through hole insertion can enable the limiting member 320 to move relative to the mounting portion 310, so that the limiting member 320 realizes extension and contraction relative to the mounting portion 310 by changing the position relative to the mounting portion 310.

[0045] Figure 5 And Figure 6 The limiting member 320 rotates relative to the mounting portion 310 to realize the opening and closing state switching by changing the posture. Figure 1 And Figure 2 The limiting member 320 moves forward and backward relative to the mounting portion 310 to realize the retreat stop position adjustment. The specific structure and working mode of the above two embodiments will be described in detail below.

[0046] It should be noted that no matter whether the limiting member 320 needs to perform rotation, overturning or movement, the freedom of movement of the limiting member 320 needs to be limited to ensure the stability of the limiting member 320 during movement, thereby protecting the limiting member 320 from being misaligned or deviating from the target movement track during movement. Therefore, the utility model sets a contact portion on the mounting portion 310, which is used for abutting contact with the limiting member 320, so that the limiting member 320 can only move relative to the mounting portion 310 along a specific direction or angle, thereby achieving the purpose of protecting the limiting member.

[0047] Preferably, the contact portion is symmetrically arranged on the opposite sides of the limiting member 320 to abut and limit the limiting member 320 from the opposite sides, so as to ensure that the limiting member 320 can stably reciprocate along a certain specific plane (such as a horizontal plane) or along a certain specific direction (such as a straight line direction).

[0048] Exemplarily, the contact portion and the limiting member 320 can be 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 member 320. Among them, in the case that the limiting member 320 can move or rotate relative to the mounting portion 310, the surface contact mode is preferably adopted to improve the stability of the movement or rotation of the limiting member 320.

[0049] Preferably, at least part or all of the contact portion is movable to approach or move away from the limiting member 320. In this way, by causing at least part or all of the contact portion to approach the limiting member 320, the contact portion and the limiting member 320 can be brought into close contact with each other, by causing at least part or all of the contact portion to move away from the limiting member 320, the close contact between the contact portion and the limiting member 320 can be reduced, or even the contact portion and the limiting member 320 can no longer contact each other. In this way, the operator can adjust the degree of freedom of the contact portion relative to the limiting member 320 according to actual needs. If necessary, the contact portion can also be adjusted to avoid the limiting member 320, so as to facilitate the maintenance or replacement of the limiting member 320.

[0050] In some embodiments of the present application, the mounting portion 310 includes a first mounting portion 311 and a second mounting portion 312. The first mounting portion 311 is mounted to the fixed end 100. 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. Among them, the limiting member 320 is movably connected to the second mounting portion 312, and at least part or all of the second mounting portion 312 forms a contact portion.

[0051] Specifically, the first mounting portion 311 is formed in a flat plate structure or an arc surface structure that is attached to the fixed end 100. Figure 5 and 6 Taking the embodiment of the limiting member 320 rotating relative to the mounting portion 310 as an example, the first mounting portion 311 is formed in a flat plate structure or an arc surface structure that is attached to the fixed end 100. For example, in the case of a sleeve as the fixed end 100, the first mounting portion 311 can be formed in an arc-shaped plate to be attached to the outer wall of the sleeve. For example, in the case of a pipe segment 600 as the fixed end, a construction plane can be arranged or built on the concave surface of the pipe segment 600. The concave surface of the pipe segment 600 is filled and reinforced as a construction plane, and the first mounting portion 311 can be attached to the construction plane in a flat plate structure. The second mounting portion 312 serves to support the limiting member 320, and therefore it needs to protrude outward relative to the surface of the first mounting portion 311. For example, in the case of a sleeve as the fixed end 100, the second mounting portion 312 can be formed in an arc-shaped plate to be attached to the outer wall of the sleeve. Figure 5 、 Figure 6 , and Figure 8As shown, the second mounting portion 312 includes two connecting plates arranged in parallel from top to bottom, and both of the connecting plates protrude outward relative to the surface of the first mounting portion 311. The limiting member 320 includes a head end 320a and a tail end 320b, the head end 320a is used for limiting and stopping the target object 200, and the tail end 320b is movably connected with the mounting portion 310 through the first pin shaft 330 and is inserted between the two connecting plates. Thus, in the case of arranging the stopper hook 300 along the horizontal direction, the second pin shaft 340 is pulled out, so that the limiting member 320 can rotate along the horizontal direction around the first pin shaft 330. The second mounting portion 312 formed by the two connecting plates can serve 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 respectively, which not only ensures that the limiting member 320 is smoothly and stably opened and closed, but also facilitates the installation and fixation of the first pin shaft 330 and the second pin shaft 340.

[0052] In Figure 1 and 2 For example, in the case of the limiting member 320 moving relative to the mounting portion 310 in the front-back direction, the second mounting portion 312 can also include a connecting portion 312b and an abutting portion 312c. The connecting portion 312b is formed in a protruding structure relative to the first mounting portion 311, and can be a square plate, a polygonal plate, a circular plate or any other shape. The connecting portion 312b is connected with the first mounting portion 311. The abutting portion 312c is connected with either the connecting portion 312b or the first mounting portion 311, or is respectively connected with both the connecting portion 312b and the first mounting portion 311. The limiting member 320 abuts against the abutting portion 312c in the second mounting portion 312 to support and limit the limiting member 320. The connecting portion 312b is provided with a through hole 312a, and the limiting member 320 penetrates through the through hole 312a. Thus, the limiting member 320 is not only supported and fixed by the through hole 312a, but also can move back and forth along the axis of the through hole 312a.

[0053] In this case, since the limiting member 320 moves linearly relative to the mounting portion 310, the two abutting portions 312c can be symmetrically arranged on the opposite sides of the limiting member 320 and abut against the limiting member 320 respectively, so as to stop and limit the limiting member 320 from the opposite sides respectively, and ensure that the movement trajectory of the limiting member 320 is always linear and is not easy to be deflected or twisted.

[0054] For example, Figure 1 and 2As shown, 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. Wherein, the abutting nail 312c2 is movable relative to the support plate 312c1 to approach or move away from the limiting part 320.

[0055] It can be understood that a through hole is provided on the abutting part 312c, and the abutting nail 312c2 penetrates through the abutting part 312c through the through hole. Wherein, 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 can be moved relative to the abutting part 312c by rotating, so as to adjust the tightness of clamping the limiting part 320, thereby ensuring that the limiting part 320 moves smoothly and stably. The number of abutting nails 312c2 can be one or more, preferably, as shown in the embodiment, the abutting part 312c has two abutting nails 312c2. Figure 2 As shown, the abutting nail 312c2 is in contact with the first abutting part 322.

[0056] For Figure 1 and 2 The embodiment of the limiting part 320 moving relative to the mounting part 310 is shown, which has the advantage that the extension length of the limiting part 320 relative to the mounting part 310 can be adjusted.

[0057] Due to changes in construction environment or construction needs, the target object 200 that is pushed often changes, and when the type or size of the target object 200 changes, different length of the retaining hook needs to be replaced, which leads to complex construction process. If the limiting part 320 can be moved relative to the mounting part 310 to extend or shrink relative to the mounting part 310, the extension length of the limiting part 320 relative to the mounting part 310 can be adjusted, so that it can be adapted to target objects 200 of different sizes or types according to the actual needs of the site. Therefore, by the above method, the limiting part 320 can be used to stop different sizes of target objects 200, and when the type or size of the target object 200 changes, different retaining hooks no longer need to be replaced, only the extension length of the limiting part 320 needs to be adjusted. Therefore, the above method can simplify the construction process of the pushing and tunneling equipment in tunnel construction and improve the construction efficiency. In the above case, the contact part is used to limit the movement direction of the limiting part 320 relative to the mounting part 310, so as to ensure that the limiting part 320 can stably extend and retract.

[0058] It can be understood that the movement of the limiting part 320 mentioned above includes the case that the limiting part 320 moves as a whole, and also includes the case that part of the limiting part 320 moves alone. For example, the limiting part 320 can comprise two parts that are sleeved with each other, and the two parts are relative to each other to extend and retract, so that part of the structure of the limiting part 320 can move relative to the mounting part 310.

[0059] The limiting member 320 of this utility model preferably achieves its telescopic distance adjustment by reciprocating along a straight line relative to the mounting part 310. The anti-reverse hook 300 of this utility model also includes a telescopic drive mechanism for driving the limiting member 320 to move. The telescopic mechanism can be an automatic telescopic drive mechanism or a manual telescopic drive mechanism.

[0060] It is understood that in the existing technology, there are various power supply elements and motion methods for driving target components to move. For example, this utility model can use automatic telescopic drive mechanisms such as hydraulic cylinders, electric cylinders, motors, and electric push rods to drive the limiting member 320. The limiting member 320 and the automatic telescopic drive mechanism can be connected by a transmission structure. For example, a gear rack, ball screw, belt, cam, or other structure that can convert rotary motion into linear motion can be used to achieve transmission.

[0061] Preferably, a hydraulic cylinder can be used as the telescopic drive mechanism, and the hydraulic cylinder can be directly connected to the limiting member 320. Since the limiting member 320 is movably connected to the mounting part 310, the limiting member 320 can be directly moved relative to the mounting part 310 by the telescopic movement of the hydraulic cylinder.

[0062] The movable connection between the limiting member 320 and the mounting part 310 should ensure that the limiting member 320 can both connect to the mounting part 310 and move relative to it. For example, a slide rail can be provided on the mounting part 310, and a slider can be provided on the limiting member 320, with the two slidably connected, so that the limiting member 320 can slide and extend relative to the mounting part 310 along the slide rail under the drive of the telescopic drive mechanism. Alternatively, a similar method can be used... Figure 1 and Figure 2 As shown, the tail end 320b of the limiting member 320 is inserted through the through hole 312a to be movably connected to the mounting part 310. Then, a manual or automatic telescopic drive mechanism is used to drive the limiting member 320 to extend or retract relative to the mounting part 310 along the axis of the through hole 312a. Figure 1 and Figure 2 In one embodiment, two abutting parts 312c are symmetrically arranged on opposite sides of the limiting member 320 and respectively abut against the limiting member 320, thereby restricting the degree of freedom of the limiting member 320 when it moves back and forth from opposite sides of the limiting member 320.

[0063] like Figure 3 and Figure 4As shown, the retreat prevention hook 300 further comprises a screwing portion 350 provided at the tail end 320b. The screwing portion 350 is configured to be inserted by a screwing tool, so that the screwing tool drives the tail end 320b of the limiting member 320 to move back and forth along the axis of the through hole 312a by rotating at least a portion of the screwing portion 350. The screwing manner of driving the limiting member 320 to move can facilitate relatively accurate regulation of the moving stroke of the limiting member 320.

[0064] Specifically, as shown in Figure 3 and Figure 4 , the screwing portion 350 comprises a rotatable ring nut 352 provided at the tail end 320b and threadedly connected with the tail end 320b. The ring nut 352 drives the tail end 320b to move back and forth along the axis of the through hole 312a by rotating.

[0065] The ring nut 352 is sleeved on 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.

[0066] Preferably, as shown in Figure 3 and Figure 4 , the screwing portion 350 further comprises a sleeve 351 sleeved 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.

[0067] Specifically, the mounting portion 310 comprises an abutting portion 312b, and the ring nut 352 abuts against the abutting portion 312b to provide the ring nut 352 with a counterforce required for screwing. The opening 351a is configured to be inserted by a screwing tool, so that an operator rotates the ring nut 352 using the screwing tool. Exemplarily, the screwing tool can be a wrench.

[0068] Preferably, as shown in Figure 3 and Figure 4 , 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.

[0069] It can be understood that the retreat prevention hook 300 can switch between the open and closed states by changing its position or shape. If the mounting portion 310 and the limiting member 320 of the retreat prevention hook 300 are configured as shown in Figure 5 or Figure 6The pin shaft connection, the limiting member 320 can be achieved by changing the posture (such as rotation) relative to the mounting portion 310, to achieve the locking of the target object. However, for the embodiment of Figure 1 and Figure 2 , because the limiting member 320 has been set to be able to move relative to the mounting portion 310, it is difficult to set the limiting member 320 as a whole, which can move relative to the mounting portion 310, and rotate or flip relative to the mounting portion 310. Therefore, in the embodiment of Figure 1 and Figure 2 , it is necessary to switch the opening and closing state of the limiting member 320 by other means. Specifically, the limiting member 320 can be designed to include a head end 320a and a tail end 320b. The head end 320a is moved relative to the tail end 320b, so that the limiting member 320 switches between at least two states.

[0070] For example, as shown in Figure 1 and Figure 2 , the tail end 320b is inserted through the through hole 312a and the connecting portion 312b in the mounting portion 310, and the tail end 320b is moved relative to the mounting portion 310 to adjust the extension length of the limiting member 320 relative to the mounting portion 310. The head end 320a is moved relative to the tail end 320b to change the pose, so that the limiting member 320 switches between at least two states including the first state and the second state. Exemplarily, the head end 320a and the tail end 320b can be connected by a pin shaft, or a hinge, or a ball hinge.

[0071] In the above manner, the limiting member 320 can be moved as a whole. When moved to a suitable position, the head end 320a which is separately provided and movably connected with the tail end 320b 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.

[0072] In the above embodiment, the contact portion is used to limit the movement direction of the head end 320a relative to the tail end 320b, to ensure that the head end 320a can be stably opened and closed. Specifically, as shown in Figure 1 and Figure 2As shown, the head end 320a and the tail end 320b can be rotatably connected through the first pin shaft 330. 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 the person skilled in the art can leave out the space required for rotation around the head end 320a according to actual needs. The contact part includes the upper and lower symmetrically arranged abutting nails 312c2, and the two sides of the abutting nails 312c2 are respectively limited by the limiting member 320 to ensure that the limiting member 320 remains stable during linear movement, and to ensure that the head end 320a remains stable during rotation.

[0073] 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 inserted and pulled out in the other pair of through holes. The second pin shaft 340 is used to realize the locking of the head end 320a. 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.

[0074] It can be understood that the head end 320a and the tail end 320b are preferably in surface contact at the position of mutual connection to ensure that they remain stable during relative movement.

[0075] Preferably, as shown in Figure 1 and Figure 2 The tail end 320b has a second abutting member 321, and the head end 320a has a first abutting member 322. The head end 320a and the tail end 320b are in contact with each other through the first abutting member 322 and the second abutting member 321. The first abutting member 322 can be formed as a flat plate structure, and the second abutting member 321 has a flat surface to realize surface contact between the two.

[0076] Further preferably, the head end 320a includes two first abutting members 322, the tail end 320b includes a second abutting member 321 arranged between the two first abutting members 322, the first pin shaft 330 and the second pin shaft 340 respectively penetrate the first abutting member 322 and the second abutting member 321, and the first abutting member 322 and the second abutting member 321 abut and contact each other. Accordingly, it can be understood that the two pairs of through holes mentioned above are arranged on the first abutting member 322 and the second abutting member 321. The above structure ensures that the head end 320a and the tail end 320b remain stable during relative movement, and makes the first pin shaft 330 easy to install and the second pin shaft 340 easy to insert and pull out.

[0077] In addition, since the part of the movable connection is prone to wear and damage, the retreat hook will generate the need for maintenance and replacement. Figure 5 and Figure 6 The limit stop is achieved in the way of display, when the wear occurs at the movable connection position between the mounting part 310 and the limiting piece 320, the mounting part 310 and the limiting piece 320 need to be replaced at the same time generally, which increases the cost of maintenance and maintenance. In addition, since the mounting part 310 is fixedly installed, the way of fixed installation is generally welding, riveting and the like, and the replacement of the mounting part 310 is relatively complex and troublesome. Therefore, compared with the technical solution of setting the mounting part 310 and the limiting piece 320 of the retreat hook 300 as movable connection to achieve the limit stop, the technical solution of setting the head end 320a of the retreat hook 300 as movable connection with the tail end 320b can reduce the difficulty and cost of maintenance, when the wear and damage occur at the movable connection position, only the limiting piece 320 or part of the limiting piece 320 needs to be replaced, and the maintenance can be completed, the cost of maintenance and maintenance is lower, and the required process is simple and convenient, and the efficiency is higher.

[0078] The utility model also provides a push jacking equipment, the push jacking equipment includes: target 200 and push end, push end is used for pushing target 200 relative to fixed end 100. Target 200 can be the main machine and / or segment of push jacking equipment, and the push end can be the counterforce frame with push cylinder. The push end is connected with the fixed end 100. The push jacking equipment further includes one or more retreat hooks 300 of any of the above technical solutions, which is installed on the fixed end 100 and used to stop the target 200.

[0079] The push jacking equipment of the utility model includes the retreat hook 300 of any of the technical solutions of the utility model, and therefore has all the beneficial effects of the retreat hook 300 of any of the technical solutions of the utility model, which will not be repeated here.

[0080] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements 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 utility model.

Claims

1. A retreat prevention hook, characterized by comprising: The stop hook (300) comprises: a mounting portion (310) for mounting and fixing the stop hook (300); a limiting piece (320) movably connected with the mounting portion (310), the limiting piece (320) being switchable between at least two states including a first state and a second state, the limiting piece (320) stopping a target object (200) in the first state and avoiding the target object (200) in the second state; wherein the mounting portion (310) has a contact portion in abutting contact with the limiting piece (320) to limit the freedom of movement of the limiting piece (320) relative to the mounting portion (310).

2. The retreat hook of claim 1, wherein, The contact portion is symmetrically arranged on opposite sides of the limiting piece (320).

3. The retreat hook of claim 1, wherein, The contact portion and the limiting piece (320) are in surface contact, line contact or point contact.

4. The retreat hook of claim 1, wherein, At least part or all of the contact portion is movable to approach or move away from the limiting piece (320).

5. The retreat hook of claim 1, wherein, The mounting portion (310) comprises: a first mounting portion (311) mounted to a fixed end (100); a second mounting portion (312) connected with the first mounting portion (311) and protruding outward relative to the surface of the first mounting portion (311); wherein the limiting piece (320) is movably connected with the second mounting portion (312), and at least part or all of the second mounting portion (312) forms the contact portion.

6. The retreat hook of claim 5, wherein, The second mounting portion (312) comprises: a connecting portion (312b) connected with the first mounting portion (311), and a through hole (312a) is provided on the connecting portion (312b), and the limiting piece (320) penetrates through the through hole (312a); an abutting portion (312c) connected with the first mounting portion (311) and / or the connecting portion (312b); wherein the two abutting portions (312c) are symmetrically arranged on opposite sides of the limiting piece (320) and are in abutting contact with the limiting piece (320) respectively.

7. The retreat hook of claim 6, wherein, The abutting portion (312c) comprises: a support plate (312c1) connected with the first mounting portion (311) and / or the connecting portion (312b); an abutting nail (312c2) penetrating through the support plate (312c1) and used for abutting contact with the limiting piece (320); wherein the abutting nail (312c2) is movable relative to the support plate (312c1) to approach or move away from the limiting piece (320).

8. The retreat hook according to any one of claims 1 to 7, wherein The limiting piece (320) is also movable relative to the mounting portion (310) to adjust the protruding length of the limiting piece (320) relative to the mounting portion (310), and the contact portion is used for limiting the movement direction of the limiting piece (320) relative to the mounting portion (310).

9. The retreat hook according to any one of claims 1 to 7, wherein The limiting piece (320) comprises a head end (320a) and a tail end (320b), the head end (320a) is movable relative to the tail end (320b), so that the limiting piece (320) switches between the at least two states, and the contact part is used for limiting the moving direction of the head end (320a) relative to the tail end (320b).

10. A jacking advance device, characterized by The pushing and excavating device comprises: A target object (200); A pushing end used for pushing the target object (200) relative to a fixed end (100); One or more retreat-preventing hooks (300) as claimed in any one of claims 1 to 9, which are installed on the fixed end (100) and used for stopping the target object (200).

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