A propulsion mechanism for a vertical tunneling head

Abstract

The present invention discloses a propulsion mechanism for a vertical tunneling head, which relates to the technical field of construction equipment for pit bodies in tunnels. The propulsion mechanism includes a propulsion oil cylinder, a propulsion pressing plate, a connecting ring, a spring, an elastic body, and a connecting sleeve. A plurality of guide holes are provided on the propulsion pressing plate, and a guide post is inserted through each guide hole. Both the propulsion oil cylinder and the guide posts are fixedly connected to the frame. The bottom end of the connecting ring is detachably connected to the pipe section. The connecting ring is fixedly connected to the bottom end of the connecting sleeve. A spherical concave surface is provided on the top surface of the connecting ring, and a spherical convex surface that fits the spherical concave surface is provided on the bottom surface of the propulsion pressing plate. A through hole is provided in the propulsion pressing plate, and the connecting sleeve is inserted through the through hole with a gap between the connecting sleeve and the through hole. One end of the spring abuts against the propulsion pressing plate, and the other end abuts against a convex ring on the connecting sleeve. The elastic body is fixedly arranged in the through hole and sleeved on the connecting sleeve. The present invention can prevent jamming between the guide holes of the propulsion pressing plate and the guide posts.

Description

Technical Field

[0001] The present invention relates to the technical field of pit construction equipment in tunnels, and particularly to a propulsion mechanism for a vertical boring head. Background Art

[0002] In the disposal of high-level radioactive waste, burying high-level radioactive waste in a stable geological body at a depth range of 500 m to 1000 m is currently the internationally recognized final disposal method with feasible technology.

[0003] The disposal repository of high-level radioactive waste in the geological body usually includes a horizontal passage and a disposal pit vertically downward on the passage. The above-mentioned vertically downward disposal pit needs to be formed by vertically boring downward in the rock mass by a vertical boring head, that is, vertical boring operation.

[0004] During the vertical boring operation, it is necessary to drive the vertical boring head downward through a propulsion mechanism; the existing propulsion mechanism usually includes a propulsion oil cylinder and a propulsion pressure plate. The propulsion pressure plate is sleeved on a plurality of vertical guide columns, and the guide columns are fixed. The vertical boring head is detachably connected to the pressure plate; the propulsion oil cylinder drives the propulsion pressure plate to move downward along the guide column, and at the same time, the propulsion pressure plate pushes the vertical boring head downward; however, since the external force received by the vertical boring head during the boring process is very large, and the direction of the external force received by it may not be parallel to the vertical direction, a force not parallel to the vertical direction exists between the guide hole of the propulsion pressure plate and the corresponding guide column, resulting in an increase in the mutual force between the guide hole and the guide column different from the vertical direction. In severe cases, the guide hole of the propulsion pressure plate and the corresponding guide column will be stuck, and then it will be impossible to drive the propulsion pressure plate to lift and lower through the oil cylinder, affecting the normal progress of the propulsion operation of the vertical boring head. Summary of the Invention

[0005] The purpose of the present invention is to provide a propulsion mechanism for a vertical boring head to solve the problems existing in the above-mentioned prior art, prevent the guide hole of the propulsion pressure plate from being stuck with the guide column, and thus ensure the normal progress of the propulsion operation of the vertical boring head.

[0006] To achieve the above purpose, the present invention provides the following solution:

[0007] The present invention provides a propulsion mechanism for a vertical boring head, including a propulsion oil cylinder, a propulsion pressure plate, a connecting ring, a spring, an elastic body, and a connecting sleeve; the propulsion oil cylinder is used to drive the propulsion pressure plate to perform lifting and lowering movements in the vertical direction; a plurality of guide holes are provided on the propulsion pressure plate, and each guide hole is provided with a guide column. The propulsion oil cylinder and the guide column are both fixedly connected to the frame;

[0008] The bottom end of the connecting ring is detachably connected to the top pipe joint in the vertical boring head;

[0009] The connecting ring is fixedly connected to the bottom end of the connecting sleeve; a spherical concave surface is provided on the top surface of the connecting ring, a spherical convex surface that fits with the spherical concave surface is provided on the bottom surface of the pushing pressure plate, a through hole corresponding to the connecting sleeve is provided on the pushing pressure plate, the connecting sleeve is arranged in the through hole, and there is a gap between the outer wall of the connecting sleeve and the inner wall of the through hole; one end of the spring abuts against the pushing pressure plate and the other end abuts against a convex ring on the connecting sleeve, and under the action of the elastic force of the spring, the spherical concave surface and the spherical convex surface are closely fitted; the elastic body is in a cylindrical shape, the elastic body is fixedly arranged in the through hole, and the elastic body is sleeved on the connecting sleeve, and the inner wall of the elastic body fits with the outer wall of the connecting sleeve; the elastic body is made of an elastic material.

[0010] Preferably, a mounting seat is provided at the top end of the through hole corresponding to the spring, the mounting seat is fixedly connected to the pushing pressure plate, the spring is located below the convex ring, the spring is sleeved on the connecting sleeve, the top end of the spring abuts against the convex ring, and the bottom end of the spring abuts against the mounting seat.

[0011] Preferably, a limiting ring is provided at the top end of the connecting ring, a receiving cavity is provided at the bottom of the pushing pressure plate, the limiting ring is located in the receiving cavity, the bottom of the connecting ring extends out of the bottom opening of the receiving cavity, and the diameter of the bottom opening is smaller than the diameter of the limiting ring;

[0012] The connecting ring can move relative to the pushing pressure plate.

[0013] Preferably, there are two pushing oil cylinders, the piston rod of each pushing oil cylinder is fixedly connected to the frame, and the cylinder body of each pushing oil cylinder is fixedly connected to the pushing pressure plate.

[0014] The present invention has achieved the following technical effects compared with the prior art:

[0015] The pushing mechanism for the vertical tunneling head of the present invention can prevent jamming between the guiding hole of the pushing pressure plate and the guiding column, thereby ensuring the normal progress of the pushing operation of the vertical tunneling head.

[0016] Specifically, during the process of pushing the vertical tunneling head by the pushing mechanism for the vertical tunneling head of the present invention, when the vertical tunneling head is subjected to an external force different from the vertical direction, it will drive the connecting ring to shake relative to the pushing pressure plate, rather than driving the pushing pressure plate to shake together, thus avoiding jamming between the guiding hole of the pushing pressure plate and the guiding column. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the propulsion mechanism for the vertical tunneling head of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the propulsion mechanism for the vertical tunneling head of the present invention;

[0020] Figure 3 is Figure 2 a partial enlarged view of part A in

[0021] Among them, 1, propulsion oil cylinder; 2, propulsion pressing plate; 3, connecting sleeve; 4, pipe section; 5, convex ring; 6, spring; 7, mounting seat; 8, elastic body; 9, connecting ring; 10, limiting ring; 11, accommodating cavity; 12, guiding hole. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a propulsion mechanism for a vertical tunneling head to solve the problems existing in the above-mentioned prior art, prevent jamming between the guiding holes of the propulsion pressing plate and the guiding columns, and thus ensure the normal progress of the propulsion operation of the vertical tunneling head.

[0024] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0025] As Figures 1-3 shown, this embodiment provides a propulsion mechanism for a vertical tunneling head, including a propulsion oil cylinder 1, a propulsion pressing plate 2, a connecting ring 9, a spring 6, an elastic body 8 and a connecting sleeve 3.

[0026] Among them, the propulsion oil cylinder 1 is used to drive the propulsion pressing plate 2 to move up and down vertically; four guiding holes 12 are provided on the propulsion pressing plate 2, and a guiding column (not shown in the figure) is inserted into each guiding hole 12. Both the propulsion oil cylinder 1 and the guiding column are fixedly connected to the frame.

[0027] In this embodiment, there are two propulsion cylinders 1. The piston rod of each propulsion cylinder 1 is fixedly connected to the frame, and the cylinder body of each propulsion cylinder 1 is fixedly connected to the propulsion pressing plate 2.

[0028] The center of the top surface of the connecting ring 9 is fixedly connected to the bottom end of the connecting sleeve 3; a spherical concave surface is provided on the top surface of the connecting ring 9, and the connecting sleeve 3, the connecting ring 9 and the spherical concave surface are coaxial.

[0029] A spherical convex surface that fits the spherical concave surface is provided on the bottom surface of the propulsion pressing plate 2. The propulsion pressing plate 2 is provided with a through hole corresponding to the connecting sleeve 3, and the connecting sleeve 3 is inserted through the through hole, and there is a gap between the outer wall of the connecting sleeve 3 and the inner wall of the through hole.

[0030] At the top end of the through hole, a mounting seat 7 is provided corresponding to the spring 6. The mounting seat 7 is fixedly connected to the propulsion pressing plate 2. The spring 6 is located below the convex ring 5. The spring 6 is sleeved on the connecting sleeve 3. The top end of the spring 6 abuts against the convex ring 5 fixed on the connecting sleeve 3, and the bottom end of the spring 6 abuts against the mounting seat 7. The spring 6 gives an upward elastic force to the connecting sleeve 3 through the convex ring 5. Under the action of the elastic force of the spring 6, the spherical concave surface and the spherical convex surface are closely attached.

[0031] The bottom end of the connecting ring 9 is used to be detachably connected to the pipe section 4 at the top end in the vertical tunneling head; it should be noted that when disconnecting, the elastic force of the spring 6 only needs to overcome the gravity of the connecting sleeve 3, the connecting ring 9 and the pipe section 4 to make the spherical concave surface and the spherical convex surface closely attached. Because during the tunneling of the vertical tunneling head, when adding a pipe section 4 to the top of the vertical tunneling head, only the propulsion mechanism needs to lift the added pipe section 4 upward. The process of how to add a pipe section 4 to the vertical tunneling head is prior art. For example, there are relevant records in the patent with the application number CN202110375947.0. Therefore, in this application, the specific process of how to add a pipe section to the vertical tunneling head will not be elaborated here; and it does not need to overcome the entire gravity of the vertical tunneling head, because during the working process, the cutter head at the bottom end of the vertical tunneling head is abutted against the face of the tunneling pit, and the face of the tunneling pit (i.e., the bottom surface) supports other parts of the vertical tunneling head except the topmost pipe section 4.

[0032] The elastomer 8 is in a cylindrical shape and is made of an elastic material; the elastomer 8 is fixedly arranged in the through hole provided in the propulsion pressing plate 2 corresponding to the connecting sleeve 3, and the elastomer 8 is sleeved on the connecting sleeve 3, and the inner wall of the elastomer 8 is attached to the outer wall of the connecting sleeve 3.

[0033] A limit ring 10 is provided at the top end of the connecting ring 9, and a receiving cavity 11 is provided at the bottom of the pushing pressure plate 2. The limit ring 10 is located in the receiving cavity 11. The bottom of the connecting ring 9 extends out of the bottom opening of the receiving cavity 11, and the diameter of the bottom opening is smaller than the diameter of the limit ring 10. It should be noted that although the top of the connecting ring 9 is located in the receiving cavity 11, it should be ensured that the connecting ring 9 as a whole can move relative to the pushing pressure plate 2. When it is necessary to drive the vertical tunneling head to rise, the pushing oil cylinder 1 drives the pushing pressure plate 2 to move upward along the guiding column. The bottom surface of the limit ring 10 contacts the bottom surface of the receiving cavity 11, so that the pushing pressure plate 2 drives the connecting ring 9 to move upward, and the connecting ring 9 further drives the pipe joint 4 to rise, and the pipe joint 4 then drives other parts of the vertical tunneling head to rise.

[0034] The working principle of the pushing mechanism for the vertical tunneling head in this embodiment is as follows:

[0035] The vertical tunneling head is used to vertically tunnel a tunneling pit in a rock mass. The surface of the rock mass or the face (i.e., the bottom surface) of the tunneling pit supports other parts of the vertical tunneling head except the topmost pipe joint 4. Under the action of the elastic force of the spring 6, the gravity of the connecting sleeve 3, the connecting ring 9 and the pipe joint 4 is overcome, so that the spherical concave surface on the top surface of the connecting ring 9 is closely attached to the spherical convex surface at the bottom end of the pushing pressure plate 2. During the process of pushing the vertical tunneling head, when the vertical tunneling head is subjected to an external force other than the vertical direction, it will drive the connecting ring 9 to shake relative to the pushing pressure plate 2 through grouting, rather than driving the pushing pressure plate 2 to shake together, thus avoiding jamming between the guiding hole 12 of the pushing pressure plate 2 and the guiding column.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "top", "bottom", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] Specific examples are applied in the present invention to elaborate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A propulsion mechanism for a vertical tunneling head, characterized in that: It includes a propulsion oil cylinder, a propulsion pressing plate, a connecting ring, a spring, an elastomer and a connecting sleeve; the propulsion oil cylinder is used to drive the propulsion pressing plate to move up and down vertically; a plurality of guiding holes are provided on the propulsion pressing plate, and a guiding column is inserted through each of the guiding holes, and both the propulsion oil cylinder and the guiding column are fixedly connected to the frame; The bottom end of the connecting ring is detachably connected to the pipe section at the top end in the vertical tunneling head; The connecting ring is fixedly connected to the bottom end of the connecting sleeve; a spherical concave surface is provided on the top surface of the connecting ring, a spherical convex surface that fits the spherical concave surface is provided on the bottom surface of the propulsion pressing plate, a through hole corresponding to the connecting sleeve is provided on the propulsion pressing plate, the connecting sleeve is inserted through the through hole, and there is a gap between the outer wall of the connecting sleeve and the inner wall of the through hole; one end of the spring abuts against the propulsion pressing plate, and the other end abuts against a convex ring on the connecting sleeve, and under the action of the elastic force of the spring, the spherical concave surface and the spherical convex surface are closely attached; the elastomer is in a cylindrical shape, the elastomer is fixedly arranged in the through hole, and the elastomer is sleeved on the connecting sleeve, and the inner wall of the elastomer is attached to the outer wall of the connecting sleeve; the elastomer is made of an elastic material.

2. The propulsion mechanism for a vertical tunneling head according to claim 1, wherein: A mounting seat corresponding to the spring is provided at the top end of the through hole, the mounting seat is fixedly connected to the propulsion pressing plate, the spring is located below the convex ring, the spring is sleeved on the connecting sleeve, the top end of the spring abuts against the convex ring, and the bottom end of the spring abuts against the mounting seat.

3. The propulsion mechanism for a vertical tunneling head according to claim 1, characterized in that: A limiting ring is provided at the top end of the connecting ring, a receiving cavity is provided at the bottom of the propulsion pressing plate, the limiting ring is located in the receiving cavity, the bottom of the connecting ring extends out of the bottom opening of the receiving cavity, and the diameter of the bottom opening is smaller than the diameter of the limiting ring; The connecting ring can move relative to the propulsion pressing plate.

4. The propulsion mechanism for a vertical tunneling head according to claim 1, characterized in that: There are two propulsion oil cylinders, the piston rod of each propulsion oil cylinder is fixedly connected to the frame, and the cylinder body of each propulsion oil cylinder is fixedly connected to the propulsion pressing plate.

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