A butterfly shield segment mold cover plate

Abstract

The utility model discloses a butterfly shield pipe piece mould cover plate is set up in the top of pouring mould, the cover plate includes cover plate body and buckling part, the cover plate body includes the first sub -cover plate of setting up the feed port, and the second sub -cover plate, third sub -cover plate of mirror image setting in the both ends of first sub -cover plate, second sub -cover plate, third sub -cover plate are connected with first sub -cover plate rotation to make the cover plate body present butterfly structure, the buckling part is installed in the both sides top of pouring mould, for the second sub -cover plate, third sub -cover plate is away from the one end of first sub -cover plate and is pressed on pouring mould. The cover plate body has adopted three segment type's butterfly structure, has reduced the vertical stroke required when opening, for pressing the second sub -cover plate, third sub -cover plate, the buckling part has replaced the traditional support foot, has saved the lateral space required for installing pouring mould. Comprehensive this two points, the cover plate is more efficient, convenient under the premise of satisfying the sealing requirement, solves the problem of insufficient configuration space.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel segment production technology, and in particular to a shield tunnel segment mold cover plate. Background Technology

[0002] In tunnel engineering, when producing large-sized shield tunnel segments, the workshop often faces challenges such as insufficient space for casting molds and difficulty in fully unfolding attached cover plates. The traditional solution is to use universal cover plates separate from the casting molds and manually transport them using a gantry crane. However, this method has significant drawbacks: firstly, manual tightening of the cover plate bolts before casting makes it difficult to guarantee sealing, easily leading to concrete leakage and severely affecting the density and appearance quality of the segment's outer arc surface; secondly, after casting, the cover plates still need to be manually transported back to the previous process, resulting in high labor intensity, high safety risks, and low construction efficiency. Therefore, a new technical solution is urgently needed that can more efficiently and conveniently solve the problem of insufficient space while meeting sealing requirements. Utility Model Content

[0003] The main technical problem to be solved by this utility model is to provide a shield tunnel segment mold cover plate that can solve the problem of insufficient configuration space more efficiently and conveniently while meeting the sealing requirements.

[0004] To solve the above-mentioned technical problems, this utility model provides a butterfly-shaped shield tunnel segment mold cover plate, which is disposed on the top of the casting mold; the cover plate includes a cover plate body and a fastening part;

[0005] The cover plate body includes a first sub-cover plate with a feed inlet, and a second sub-cover plate and a third sub-cover plate mirror-distributed at both ends of the first sub-cover plate; the second sub-cover plate and the third sub-cover plate are rotatably connected to the first sub-cover plate so that the cover plate body has a butterfly-shaped structure.

[0006] The fastening parts are installed on the top of both sides of the casting mold and are used to press the ends of the second sub-cover plate and the third sub-cover plate away from the first sub-cover plate onto the casting mold.

[0007] In a preferred embodiment, the fastening part includes a fixed base, a movable pressure plate, and an elastic reset member;

[0008] The fixed base is rigidly fixed to the top of both ends of the casting mold; the movable pressure plate is connected to the fixed base through the elastic reset member so as to open in the direction of the cover plate body; when the movable pressure plate opens at an angle to the fixed base, the elastic reset member accumulates elastic potential energy.

[0009] In a preferred embodiment, the cover plate body further includes an airbag telescopic mechanism and a transverse fastener; at least one set of the airbag telescopic mechanism is provided on the top of each of the second sub-cover plate and the third sub-cover plate; the transverse fastener includes a crossbar and a fastening hook; the crossbar is provided on the top of the airbag telescopic mechanism along the width direction of the second sub-cover plate and the third sub-cover plate; the fastening hook is connected to both ends of the crossbar and is used to hook the casting mold below the cover plate body.

[0010] In a preferred embodiment, the fastening hook is rotatably connected to both ends of the crossbar.

[0011] In a preferred embodiment, the top of the second sub-cover plate and the third sub-cover plate are provided with connecting portions for connection with external lifting rods.

[0012] In a preferred embodiment, the cover plate body is provided with a sulfurized steel plate at the bottom.

[0013] In a preferred embodiment, the cover plate body is provided with a seal at the bottom.

[0014] In a preferred embodiment, the cover plate body is further provided with a plurality of positioning pins on its outer periphery, and the positioning pins are positioned in conjunction with positioning holes opened on the casting mold.

[0015] In a preferred embodiment, the elastic reset member is a high-strength spring.

[0016] In a preferred embodiment, the top surface of the cover plate body is provided with an orthogonal primary and secondary rib structure.

[0017] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0018] The cover plate provided by this utility model adopts a three-section butterfly structure, allowing the second and third sub-cover plates to rotate and open independently, reducing the vertical stroke required for opening and lowering the height requirements for the operating space. Simultaneously, the cover plate uses a snap-fit ​​part instead of traditional support legs, and a spring mechanism stably presses the two sub-cover plates together with a movable pressure plate, saving lateral space required for mold installation and ensuring a tight seal between the cover plate body and the casting mold. Regarding sealing performance, a vulcanized steel plate and sealing elements are added to the bottom of the cover plate body. Combined with the stable clamping force provided by the snap-fit ​​part and the control of installation accuracy by the positioning pin, the risk of grout leakage during concrete pouring is effectively avoided. Attached Figure Description

[0019] Figure 1 This is a partial schematic diagram of the cover plate installed on the casting mold in an embodiment of the present invention;

[0020] Figure 2This is a side view of the cover plate body when closed according to an embodiment of the present utility model;

[0021] Figure 3 This is a side view of the cover plate body partially opened in an embodiment of this utility model;

[0022] Figure 4 This is a top view of the cover plate body described in an embodiment of this utility model.

[0023] The markings in the diagram are as follows: 1-Cover plate body, 11-First sub-cover plate, 12-Second sub-cover plate, 13-Third sub-cover plate, 14-Airbag telescopic mechanism, 15-Horizontal fastener, 151-Crossbar, 152-Fasting hook, 16-Positioning pin, 2-Snap-fit ​​part, 21-Fixed base, 22-Modible pressure plate, 3-Casting mold. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] like Figures 1-4As shown, this embodiment of the utility model provides a butterfly-shaped shield tunnel segment mold cover plate, which is disposed on the top of an existing shield tunnel segment casting mold 3 (hereinafter referred to as "casting mold 3"). The cover plate includes a cover plate body 1 and a fastening part 2. Generally speaking, the cover plate body 1 adopts a three-section structure, including a first sub-cover plate 11 with a feed inlet, and a second sub-cover plate 12 and a third sub-cover plate 13 mirror-distributed at both ends of the first sub-cover plate 11. The second sub-cover plate 12 and the third sub-cover plate 13 are rotatably connected to the first sub-cover plate 11 along the transverse direction of the casting mold 3, so that the cover plate body 1 presents a butterfly-shaped structure similar to a bird wing or a butterfly. It is easy to understand that the second sub-cover plate 12 and the third sub-cover plate 13 can be opened and closed independently. The fastening part 2 is installed on the top of both sides of the casting mold 3, and is used to press the end of the second sub-cover plate 12 and the third sub-cover plate 13 away from the first sub-cover plate 11 onto the casting mold 3. The following describes each part of the cover plate in further detail with reference to the figures.

[0028] The second sub-cover plate 12 and the third sub-cover plate 13 are provided with connecting parts at their tops for connection to external lifting rods. Each of the second sub-cover plate 12 and the third sub-cover plate 13 is externally connected to at least one lifting rod. The other end of each lifting rod is connected to the output end of a pneumatic cylinder. Under wireless remote control, the pneumatic cylinder drives the lifting rod to extend and retract axially, thereby lifting or lowering the second sub-cover plate 12 or the third sub-cover plate 13. When the lifting rod lifts a traditional cover plate, the vertical stroke of the cover plate is often large to achieve the required opening area for construction, which places high demands on the operating space. Therefore, as... Figure 2 , Figure 3 As shown, the cover plate provided in this embodiment of the present invention has undergone structural optimization. The cover plate body 1 is divided into multiple sub-cover plates along its length: a first sub-cover plate 11 located in the middle section, and a second sub-cover plate 12 and a third sub-cover plate 13 mirror-imagely disposed at both ends of the first sub-cover plate 11. The first sub-cover plate 11 is provided with a feed inlet. The second sub-cover plate 12 and the third sub-cover plate 13 are independently lifted or lowered by the lifting rod, effectively shortening the vertical stroke required for lifting and giving the cover plate higher passability. It should be understood that when the second sub-cover plate 12 or the third sub-cover plate 13 is closed, the connection with the first sub-cover plate 11 is sealed to prevent concrete slurry from leaking out from the connection during pouring. The top surface of the cover plate body 1 is provided with an orthogonal primary and secondary rib structure to improve structural rigidity.

[0029] like Figure 1 , Figure 4As shown, the cover plate body 1 also includes an airbag telescopic mechanism 14, a transverse fastener 15, a positioning pin, and a sealing element. The airbag telescopic mechanism 14 works in conjunction with the transverse fastener 15. Specifically, at least one set of airbag telescopic mechanisms 14 is provided on the top of each of the second sub-cover plate 12 and the third sub-cover plate 13. The transverse fastener 15 includes a crossbar 151 and a fastening hook 152. The crossbar 151 is located on the top of the airbag telescopic mechanism 14 along the width direction of the second sub-cover plate 12 and the third sub-cover plate 13. The fastening hook 152 is rotatably connected to both ends of the crossbar 151, with the hook tip pointing downwards. During the installation stage of the cover plate body 1, the fastening hook 152 is bent inwards so that the hook tip extends inwards to hook onto the side of the casting mold 3 below when lifted. When the airbag telescopic mechanism 14 is inflated, it pushes the crossbar 151 upwards. The upward movement of the crossbar 151 causes the fastening hooks 152 on both sides to gradually hook onto the sides of the casting mold 3 until it can no longer move upward. At this time, the transverse fastener 15 generates a downward reaction force on the second sub-cover plate 12 and the third sub-cover plate 13 through the airbag telescopic mechanism 14, which stably presses these two sub-cover plates onto the casting mold 3. Conversely, when the airbag telescopic mechanism 14 deflates, the crossbar 151 moves downward, the force between the fastening hooks 152 and the casting mold 3 decreases, allowing construction personnel to pry it outward and remove it from its position.

[0030] To improve sealing, the cover plate body 1 is equipped with a vulcanized steel plate and a rubber sealing element at the bottom to minimize grout leakage during tightening. The cover plate body 1 also has several positioning pins 16 on its outer periphery. These positioning pins 16 engage with positioning holes on the casting mold 3 for positioning, which not only improves the installation accuracy of the cover plate but also enhances the sealing effect by improving the fit between the cover plate and the casting mold 3.

[0031] To allow the cover plate to open and close at both ends along its length, conventional casting molds 3 have legs extending outwards at both ends. In this embodiment, due to limited installation space, these legs are removed from the casting mold 3 and replaced by the fastening parts 2. Figure 1As shown, in this embodiment, the fastening part 2 includes at least a fixed base 21, a movable pressure plate 22, and an elastic reset member. The elastic reset member is a high-strength spring. The fixed base 21 is rigidly fixed to the top of both ends of the casting mold 3. The fastening part 2 adopts a spring clip-like structure, connecting the fixed base 21 and the movable pressure plate 22 through the high-strength spring, so that the movable pressure plate 22 opens towards the cover plate body 1. When the movable pressure plate 22 opens at an angle to the fixed base 21, the high-strength spring accumulates elastic potential energy to continuously provide a biting force pointing in the return direction. The movable pressure plate 22 extends towards the cover plate body 1, and with this biting force, the end of the second sub-cover plate 12 or the third sub-cover plate 13 away from the first sub-cover plate 11 is tightly and reliably pressed onto the bottom casting mold 3, achieving a stable seal.

[0032] The following is a brief description of the steps for using the cover plates. After the casting mold 3 is in place, the pneumatic cylinder is controlled to extend the boom axially, causing the second sub-cover plate 12 and the third sub-cover plate 13 to be lowered. After the two sub-cover plates are lowered, the positioning pins 16 are inserted into the positioning holes on the casting mold 3. Then, the fastening hooks 152 are inwardly pried into place, and the airbag telescopic mechanism 14 is controlled to inflate and extend, pushing the crossbar 151 upward, clamping the second sub-cover plate 12 and the third sub-cover plate 13 to the casting mold 3 through the fastening hooks 152 on both sides. During the insertion of the positioning pins 16 or the locking of the fastening hooks 152, the fastening part 2 causes the movable pressure plate 22 to further press the second sub-cover plate 12 and the third sub-cover plate 13. After the concrete pouring of the shield tunnel segments is completed, the airbag telescopic mechanism 14 is controlled to deflate and retract, causing the crossbar 151 to move downward under gravity, and the fastening hooks 152 on both sides to gradually loosen. Then, the fastening hook 152 is pulled outward, and the pneumatic cylinder is controlled to axially retract the lifting rod. The second sub-cover plate 12 and the third sub-cover plate 13 are lifted in a butterfly shape, and the cover plate and the casting mold 3 enter the next cycle of casting.

[0033] In summary, to address the issue of limited installation space, the cover plate adopts a three-section butterfly structure, allowing the second and third sub-cover plates 13 to rotate and open independently. This significantly reduces the vertical travel required for opening and lowers the height requirements for the operating space. Simultaneously, the cover plate uses the fastening part 2 instead of traditional supports, and a spring mechanism ensures that the movable pressure plate 22 stably presses the two sub-cover plates together. This not only saves lateral space required for mold installation but also ensures a tight seal between the cover plate body 1 and the casting mold 3. Regarding sealing performance, a vulcanized steel plate and sealing elements are added to the bottom of the cover plate body 1. Combined with the stable clamping force provided by the fastening part 2 and the control of installation accuracy by the positioning pin 16, the risk of grout leakage during concrete pouring is effectively avoided.

[0034] The above description is merely a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All technically equivalent modifications made based on the content of the present utility model specification shall fall within the protection scope of the present utility model.

Claims

1. A butterfly-shaped shield tunnel segment mold cover plate, disposed on the top of the casting mold, characterized in that: Includes the cover body and the fastening part; The cover plate body includes a first sub-cover plate with a feed inlet, and a second sub-cover plate and a third sub-cover plate mirror-distributed at both ends of the first sub-cover plate; the second sub-cover plate and the third sub-cover plate are rotatably connected to the first sub-cover plate so that the cover plate body has a butterfly-shaped structure. The fastening parts are installed on the top of both sides of the casting mold and are used to press the ends of the second sub-cover plate and the third sub-cover plate away from the first sub-cover plate onto the casting mold.

2. The butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The fastening part includes a fixed base, a movable pressure plate, and an elastic reset component; The fixed base is rigidly fixed to the top of both ends of the casting mold; the movable pressure plate is connected to the fixed base through the elastic reset member so as to open in the direction of the cover plate body; when the movable pressure plate opens at an angle to the fixed base, the elastic reset member accumulates elastic potential energy.

3. The butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The cover plate body also includes an airbag telescopic mechanism and lateral fasteners; At least one set of the airbag telescopic mechanism is provided on the top of each of the second and third sub-cover plates; the transverse fastener includes a crossbar and a fastening hook; the crossbar is provided on the top of the airbag telescopic mechanism along the width direction of the second and third sub-cover plates; the fastening hook is connected to both ends of the crossbar and is used to hook the casting mold below the cover plate body.

4. The butterfly-shaped shield tunnel segment mold cover plate according to claim 3, characterized in that: The fastening hooks are rotatably connected to both ends of the crossbar.

5. A butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The second and third sub-cover plates are provided with connecting parts at their tops for connection to external hanger rods.

6. The butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The cover plate body has a sulfidated steel plate at the bottom.

7. A butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The cover plate body has a sealing element at the bottom.

8. A butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The cover plate body is also provided with several positioning pins on its outer periphery, and the positioning pins are positioned in conjunction with the positioning holes opened on the casting mold.

9. A butterfly-shaped shield tunnel segment mold cover plate according to claim 2, characterized in that: The elastic reset component uses a high-strength spring.

10. A butterfly-shaped shield tunnel segment mold cover plate according to claim 1, characterized in that: The top surface of the cover plate body is provided with an orthogonal primary and secondary rib structure.

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