A shield trolley impact protection device

Abstract

The utility model relates to a tunnel construction technical field, concretely relates to a kind of anti-impact device for shield jumbo, including the support beam connected to shield jumbo, the side of the support beam is provided with lifting oil cylinder and telescopic leg, the lifting oil cylinder cylinder body one end is hinged with support beam, the top of telescopic leg is hinged with support beam, lifting oil cylinder telescopic rod one end is hinged with telescopic leg;The end of telescopic leg is connected with iron wedge, and the iron wedge is hinged with telescopic leg.The utility model connects anti-impact device stably to shield jumbo by support beam, after lifting oil cylinder stretches out, telescopic leg falls, then telescopic leg pushes out and supports iron wedge on ground;When shield jumbo is subjected to the explosion shock wave produced when face blasting, the anti-impact device relies on telescopic leg and iron wedge to transmit impact force to ground, prevent the whole shield jumbo from moving back, so as to ensure that shield jumbo can stably support upper surrounding rock, improve construction safety.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to an anti-impact device for a shield trolley. Background Technology

[0002] Drill and blast, a long-established and technologically mature tunnel construction method, is widely used in cut-and-cover tunnel projects due to its high flexibility, wide adaptability, and relatively low cost. Shield trolleys, as important auxiliary equipment in the drill and blast construction process, can significantly improve construction efficiency and enhance safety.

[0003] However, during actual construction, the shield trolley, being located close to the working face, is easily affected by the shock waves generated during blasting. These shock waves can cause the trolley to shift backward, making it unable to stably support the surrounding rock above, resulting in support failure and seriously affecting the safety performance of the shield trolley.

[0004] Currently, to prevent shield trolleys from shifting backward due to blast shock waves during construction, rail clamps or manual chocks are commonly used for stabilization. However, given that shield trolleys use tracked walking mechanisms, traditional shock-absorbing devices like rail clamps and manual chocks are unsuitable for this condition and cannot effectively solve the stability problem of shield trolleys under blast impacts. Therefore, designing a shock-absorbing device specifically tailored for shield trolleys that can effectively reduce manual labor and ensure shock absorption is particularly urgent and necessary. Summary of the Invention

[0005] To address the issue of shield trolleys shifting backward due to blast shock waves during drill-and-blast construction, leading to support failure and compromised safety, this invention proposes an anti-shock device for shield trolleys. The device is securely connected to the shield trolley via a support beam, ensuring its stability under shock waves and preventing backward shift. This ensures the shield trolley can stably support the surrounding rock, improving construction safety. Furthermore, the hydraulic drive enables one-button deployment and retraction, replacing tedious manual operations such as moving iron shoes and locking rail clamps, effectively reducing manual labor.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] An anti-impact device for a shield tunneling vehicle includes a support beam connected to the shield tunneling vehicle. A lifting cylinder and a telescopic leg are mounted on one side of the support beam. One end of the lifting cylinder is hinged to the support beam, and the top end of the telescopic leg is hinged to the support beam. One end of the lifting cylinder's telescopic rod is hinged to the telescopic leg. An iron wedge is connected to the end of the telescopic leg, and the iron wedge is hinged to the telescopic leg. After the lifting cylinder extends, the telescopic leg descends, and then extends to support the iron wedge on the ground. When the shield tunneling vehicle is subjected to the blast shock wave generated during a face blast, this anti-impact device uses the telescopic leg and the iron wedge to transmit the impact force to the ground, preventing the entire shield tunneling vehicle from moving backward.

[0008] Furthermore, the telescopic leg includes a telescopic cylinder, a telescopic outer tube, and a telescopic inner tube. The telescopic inner tube is inserted into the telescopic outer tube from its bottom end. The telescopic cylinder drives the telescopic inner tube to slide up and down relative to the telescopic outer tube along the axial direction of the outer tube. The telescopic cylinder is located inside the telescopic outer tube, and one end of the telescopic cylinder's telescopic rod is hinged to the telescopic inner tube. This design of the telescopic leg, particularly the combination of the telescopic cylinder, the telescopic outer tube, and the telescopic inner tube, allows the device to be adjusted in length as needed to adapt to different construction heights and distances.

[0009] Furthermore, multiple sets of support components are provided between the inner wall of the telescopic outer tube and the outer wall of the telescopic inner tube. These support components are arranged in a circumferential array along the circumference of the telescopic inner tube. Multiple sliding grooves are formed on the outer wall of the telescopic inner tube, and each groove corresponds to one of the support components, which are located within the grooves. Each support component includes a support frame, which is a U-shaped frame. Rollers are rotatably mounted on both sides and the bottom of the support frame, and these rollers contact the inner wall of the sliding groove. The circumferential array of support components along the circumference of the telescopic inner tube ensures the stability and balance of the telescopic inner tube during telescopic movement, preventing skewing or jamming caused by uneven friction.

[0010] Furthermore, one end of the lifting cylinder body is hinged to the support beam via a connecting pin, and one end of the lifting cylinder telescopic rod is hinged to the telescopic outer tube via a connecting pin. The lifting cylinder can retract its telescopic legs when the shield trolley is moving, thus retracting the device without affecting the trolley's forward or backward movement.

[0011] Furthermore, one end of the telescopic outer tube and the telescopic cylinder body is hinged to the support beam via a connecting pin.

[0012] Furthermore, the iron wedge is hinged to the end of the telescopic inner tube via a hinge shaft. This hinged design between the iron wedge and the telescopic inner tube allows the iron wedge to flexibly contact the ground or other fixed objects.

[0013] The beneficial effects of this utility model through the above technical solution are as follows:

[0014] The anti-impact device for the shield trolley provided by this utility model has the following mechanism: When the device needs to be deployed, the lifting cylinder starts working, its telescopic rod extends, and pushes the telescopic leg down; the telescopic cylinder inside the telescopic outer tube then works, driving the telescopic inner tube to slide axially downward relative to the telescopic outer tube to adjust the length of the telescopic leg; after the telescopic leg is adjusted to the appropriate length, it supports the iron wedge on the ground; when the shield trolley is subjected to the blast shock wave generated by the blasting face, the anti-impact device begins to function: the telescopic leg and the iron wedge transmit the impact force to the ground, preventing the entire shield trolley from moving backward, thereby ensuring that the shield trolley can stably support the upper surrounding rock and improve construction safety.

[0015] In this invention, the support components are designed such that, during the process of the telescopic inner tube sliding axially downward relative to the telescopic outer tube to adjust the length of the telescopic leg, the contact design between the roller and the inner wall of the slide groove greatly reduces the friction between the telescopic inner tube and the telescopic outer tube, improving the smoothness and efficiency of the telescopic process. At the same time, the support components are arranged in a circumferential array along the circumference of the telescopic inner tube, ensuring the stability and balance of the telescopic inner tube during the telescopic process, preventing skewing or jamming caused by uneven friction, and maintaining the stability of the telescopic inner tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an anti-impact device for a shield platform vehicle according to the present invention;

[0017] Figure 2 This is a schematic diagram of the support assembly between the telescopic outer tube and the telescopic inner tube in the anti-impact device for a shield vehicle according to this utility model.

[0018] Figure 3 This is a schematic diagram showing the positional relationship between the support frame and rollers in the support component of the anti-impact device for a shield vehicle according to this utility model.

[0019] The numbers in the attached diagram are:

[0020] 1. Support beam; 2. Lifting cylinder; 3. Iron wedge; 4. Telescopic cylinder; 5. Telescopic outer tube; 6. Telescopic inner tube; 7. Slide groove; 8. Support frame; 9. Roller; 10. Connecting pin one; 11. Connecting pin two; 12. Connecting pin three; 13. Hinge shaft. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] like Figures 1-3As shown, this embodiment provides an anti-impact device for a shield trolley, including a support beam 1 connected to the shield trolley. A lifting cylinder 2 and a telescopic leg are provided on one side of the support beam 1. One end of the lifting cylinder 2 is hinged to the support beam 1, and the top end of the telescopic leg is hinged to the support beam 1. One end of the telescopic rod of the lifting cylinder 2 is hinged to the telescopic leg. An iron wedge 3 is connected to the end of the telescopic leg, and the iron wedge 3 is hinged to the telescopic leg. This invention securely connects the anti-impact device to the shield trolley via the support beam 1. After the lifting cylinder 2 extends, the telescopic leg descends, and then extends to support the iron wedge 3 on the ground. When the shield trolley is subjected to the blast shock wave generated during face blasting, this anti-impact device, relying on the telescopic leg and the iron wedge 3, transmits the impact force to the ground, preventing the entire shield trolley from moving backward, thereby ensuring that the shield trolley can stably support the upper surrounding rock and improving construction safety.

[0023] In this embodiment, the telescopic leg includes a telescopic cylinder 4, a telescopic outer tube 5, and a telescopic inner tube 6. The telescopic inner tube 6 is inserted into the telescopic outer tube 5 from the bottom end of the telescopic outer tube 5. The telescopic cylinder 4 drives the telescopic inner tube 6 to slide up and down relative to the telescopic outer tube 5 along the axial direction of the telescopic outer tube 5. The telescopic cylinder 4 is located inside the telescopic outer tube 5, and one end of the telescopic rod of the telescopic cylinder 4 is hinged to the telescopic inner tube 6.

[0024] The design of the aforementioned telescopic legs, particularly the combination of the telescopic cylinder 4, the telescopic outer tube 5, and the telescopic inner tube 6, allows the device to be adjusted in length as needed to adapt to different construction heights and distances. The telescopic cylinder 4 is located inside the telescopic outer tube 5, saving space and improving the device's compactness and reliability. The hinged design between the telescopic inner tube 6 and the telescopic rod of the telescopic cylinder 4 ensures the smoothness and accuracy of the telescopic process.

[0025] Please refer to this again. Figure 2 and Figure 3 Multiple sets of support components are provided between the inner wall of the telescopic outer tube 5 and the outer wall of the telescopic inner tube 6. The multiple sets of support components are arranged in a circumferential array along the circumference of the telescopic inner tube 6. Multiple sliding grooves 7 are provided on the outer wall of the telescopic inner tube 6. The sliding grooves 7 are arranged one-to-one with the support components, and the support components are located in the sliding grooves 7. Each set of support components includes a support frame 8. The support frame 8 is a U-shaped frame. Rollers 9 are rotatably arranged on both sides and the bottom of the support frame 8. The rollers 9 are in contact with the inner wall of the sliding groove 7.

[0026] The design of the support components, especially the contact design between the roller 9 and the inner wall of the groove 7, greatly reduces the friction between the telescopic inner tube 6 and the telescopic outer tube 5, improving the smoothness and efficiency of the telescopic process. At the same time, the support components are distributed in a circumferential array along the circumference of the telescopic inner tube 6, ensuring the stability and balance of the telescopic inner tube 6 during the telescopic process and preventing skewing or jamming caused by uneven friction.

[0027] Specifically, one end of the lifting cylinder 2 is hinged to the support beam 1 via a connecting pin 10, and one end of the telescopic rod of the lifting cylinder 2 is hinged to the telescopic outer tube 5 via a connecting pin 11. With this structure, the lifting cylinder 2 can retract its telescopic legs when the shield trolley is moving, thus retracting the device without affecting the trolley's forward or backward movement.

[0028] The hinged design of the lifting cylinder 2 with the support beam 1 and the telescopic outer tube 5 allows the lifting cylinder 2 to flexibly adjust its angle and position to adapt to different construction needs and terrain conditions. At the same time, this hinged design also improves the flexibility and adaptability of the device, enabling it to work stably in various complex environments.

[0029] In this embodiment, one end of the telescopic outer tube 5 and the telescopic oil cylinder 4 is hinged to the support beam 1 via a connecting pin 12.

[0030] In this invention, the iron wedge 3 is hinged to the end of the telescopic inner tube 6 via a hinge shaft 13. The hinged design of the iron wedge 3 and the telescopic inner tube 6 allows the iron wedge 3 to flexibly contact the ground or other fixed objects. At the same time, this hinged method also facilitates the adjustment of the angle and position of the iron wedge 3 as needed during construction to better adapt to the terrain and construction requirements.

[0031] The working principle of this utility model is as follows:

[0032] Initial state and preparation:

[0033] The shock-absorbing device is securely connected to the shield trolley via the support beam 1; the lifting cylinder 2 and the telescopic legs are in their initial retracted state, which does not affect the forward or backward movement of the shield trolley.

[0034] Deployment and Adjustment: When the shock-absorbing device needs to be deployed, the lifting cylinder 2 activates, extending its telescopic rod to lower the telescopic leg. The telescopic cylinder 4 inside the outer telescopic tube 5 then operates, driving the inner telescopic tube 6 to slide axially downwards relative to the outer telescopic tube 5, thereby adjusting the length of the telescopic leg. During this process, the support assembly between the inner wall of the outer telescopic tube 5 and the outer wall of the inner telescopic tube 6 ensures smooth extension and retraction, reduces friction, and maintains the stability of the inner telescopic tube 6.

[0035] After the telescopic legs are adjusted to the appropriate length, the iron wedge 3 is supported on the ground. When the shield trolley is subjected to the shock wave generated by the blasting at the working face, the anti-shock device begins to function: the telescopic legs and iron wedge 3 transfer the impact force to the ground, preventing the entire shield trolley from moving backward, thereby ensuring that the shield trolley can stably support the upper surrounding rock and improve construction safety.

[0036] Retraction and Movement: When construction is completed or the shield trolley needs to be moved, the lifting cylinder 2 begins to retract, retracting the telescopic legs; the telescopic cylinder 4 of the telescopic legs also retracts accordingly, causing the inner telescopic tube 6 to retract into the outer telescopic tube 5. At this time, the shock-absorbing device returns to its initial retracted state, without affecting the forward or backward movement of the shield trolley.

[0037] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An anti-impact device for a shield trolley, characterized in that, It includes a support beam (1) connected to the shield trolley. A lifting cylinder (2) and a telescopic leg are provided on one side of the support beam (1). One end of the cylinder body of the lifting cylinder (2) is hinged to the support beam (1). The top end of the telescopic leg is hinged to the support beam (1). One end of the telescopic rod of the lifting cylinder (2) is hinged to the telescopic leg. An iron wedge (3) is connected to the end of the telescopic leg. The iron wedge (3) is hinged to the telescopic leg.

2. The anti-impact device for a shield trolley according to claim 1, characterized in that, The telescopic leg includes a telescopic cylinder (4), a telescopic outer tube (5), and a telescopic inner tube (6). The telescopic inner tube (6) is inserted into the telescopic outer tube (5) from the bottom end of the telescopic outer tube (5). The telescopic cylinder (4) drives the telescopic inner tube (6) to slide up and down relative to the telescopic outer tube (5) along the axial direction of the telescopic outer tube (5). The telescopic cylinder (4) is located inside the telescopic outer tube (5), and one end of the telescopic rod of the telescopic cylinder (4) is hinged to the telescopic inner tube (6).

3. The anti-impact device for a shield trolley according to claim 2, characterized in that, Multiple sets of support components are provided between the inner wall of the telescopic outer tube (5) and the outer wall of the telescopic inner tube (6). The multiple sets of support components are arranged in a circumferential array along the circumference of the telescopic inner tube (6). Multiple sliding grooves (7) are provided on the outer wall of the telescopic inner tube (6). The sliding grooves (7) are provided one-to-one with the support components, and the support components are located in the sliding grooves (7). Each set of support components includes a support frame (8). The support frame (8) is a U-shaped frame. Rollers (9) are rotatably provided on both sides and the bottom of the support frame (8). The rollers (9) are in contact with the inner wall of the sliding groove (7).

4. The anti-impact device for a shield trolley according to claim 2, characterized in that, The lifting cylinder (2) has one end of its cylinder body hinged to the support beam (1) via a connecting pin (10), and one end of its telescopic rod is hinged to the telescopic outer tube (5) via a connecting pin (11).

5. The anti-impact device for a shield trolley according to claim 2, characterized in that, The telescopic outer tube (5) and the telescopic oil cylinder (4) are hinged at one end to the support beam (1) via a connecting pin (12).

6. The anti-impact device for a shield trolley according to claim 2, characterized in that, The iron wedge (3) is hinged to the end of the telescopic inner tube (6) via a hinge shaft (13).

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