Large high-pressure spiral gate

Abstract

The utility model relates to related technical fields of tunnel construction equipment especially, and relates to a large high pressure screw machine gate, including support frame and gate, the top middle position of support frame is fixedly connected with support plate, the inside of support frame is inlayed with gate, the top bolt fixedly connected with the connecting plate of gate, the surface of lower installation base is equipped with synchronous hydraulic cylinder, the inside of support frame is provided with the sliding slot. This large high pressure screw machine gate, gate bevel sealing inlay strip generates self-tightening effect with the increase of water pressure, the sealing performance is positively correlated with pressure, and the polyurethane - metal composite layer and stainless steel inlay strip constitute multiple sealing system, and the service life is prolonged three times compared with the traditional single sealing strip scheme, the gate is optimized through structure reinforcement, sealing innovation and intelligent drive cooperation, solves the leakage problem under the high pressure working condition, and the service life and reliability are obviously superior to traditional gate, and are suitable for tunnel boring machine and other severe environment.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel construction equipment, and in particular to a large high-pressure spiral gate. Background Technology

[0002] Tunnel boring machines (TBMs) are heavy machinery used to excavate tunnels in flat ground. They achieve continuous operation by mechanically breaking rocks, removing slag, and providing support. They are widely used in tunnels, mines, and municipal engineering. Gates are one of the key components of TBMs, and their structural performance and service life directly affect the reliability and service life of the subsequent components. Therefore, a large, high-pressure spiral gate is particularly needed.

[0003] However, in the use of existing large-scale high-pressure spiral gates, most gates will have their sealing performance affected under high pressure, thus affecting the gate's performance.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN216342166U that discloses a sealing gate for the slag discharge of a tunnel boring machine's auger. The patent describes a gate comprising a gate plate, a gate frame, and a gate drive cylinder. The gate frame has an opening on one side at its upper end and insertion slots on the other sides. An oil inlet communicating with the corresponding insertion slot is located on the outer side of the gate frame. The gate plate has a gate plate edge on its outer side, and the gate plate is driven by the gate drive cylinder from the opening end of the gate frame. The gate plate's edge is inserted into the gate plate on each side. In the corresponding insertion slot, both sides of the slot are equipped with sealing strips, and when the door panel edge is inserted, the upper and lower sides respectively abut against the sealing strips on the corresponding sides. This invention greatly improves the sealing effect, avoiding damage to the equipment inside the shield due to moisture caused by water leakage. Although a complete waterproof seal can be achieved by the door panel edge abutting against the sealing strips on the upper and lower sides, and by injecting sealing grease through the oil inlet while maintaining a certain internal pressure, the sealing effect is poor under high pressure, and leakage can still occur.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Utility Model Content

[0006] The purpose of this utility model is to provide a large, high-pressure spiral machine gate to solve the problem mentioned in the background art that, during use, most of the existing large, high-pressure spiral machine gates will have their sealing performance affected under high pressure, thus affecting the gate's performance.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a large high-pressure spiral gate, comprising a support frame and a gate plate, wherein a lower mounting base is fixedly connected to the side of the support frame, a through hole is opened on the surface of the support frame, a side support frame is fixedly connected to the top side of the support frame, a support plate is fixedly connected to the middle position of the top of the support frame, a gate plate is embedded inside the support frame, a connecting plate is bolted to the top of the gate plate, a synchronous hydraulic cylinder is installed on the surface of the lower mounting base, and a sliding groove is opened inside the support frame.

[0008] Preferably, the side support frame is provided in two sets symmetrically distributed, and the support plate is provided in two sets symmetrically distributed.

[0009] Preferably, the gate is fitted inside the support frame via a groove, and a stainless steel sealing strip with a 45° bevel is provided on the side of the gate.

[0010] Preferably, two sets of connecting plates are provided and are disposed between the side support frame and the support plate.

[0011] Preferably, the piston end of the synchronous hydraulic cylinder is mounted on the surface of the upper mounting base.

[0012] Preferably, the groove is embedded with a polyurethane-metal composite sealing layer.

[0013] Preferably, the support frame is manufactured using an integral casting process and has radial reinforcing ribs inside, while the gate plate has cross-shaped reinforcing ribs inside.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the large high-pressure spiral gate has a self-tightening effect on the inclined sealing strip of the gate plate as the water pressure increases, and the sealing performance is positively correlated with the pressure. The polyurethane-metal composite layer and the stainless steel strip form a multi-seal system, which extends the service life by 3 times compared with the traditional single sealing strip solution. Through structural reinforcement, sealing innovation and intelligent drive synergistic optimization, this gate solves the leakage problem under high pressure conditions. Its service life and reliability are significantly better than traditional gates, and it is suitable for harsh environments such as tunnel boring machines. Attached Figure Description

[0015] Figure 1 This is a side view of the appearance structure of this utility model; Figure 2 This is a schematic diagram of the structure of the support frame and the synchronous hydraulic cylinder of this utility model. Figure 3 This is a schematic diagram of the cooperation structure between the gate and the connecting plate of this utility model; Figure 4 This is a schematic diagram of the structure in which the support frame and the gate plate of this utility model cooperate.

[0016] In the diagram: 1. Support frame; 2. Lower mounting base; 3. Through hole; 4. Side support frame; 5. Support plate; 6. Gate plate; 7. Connecting plate; 8. Upper mounting base; 9. Synchronous hydraulic cylinder; 10. Slide groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 This utility model provides a technical solution: a large high-pressure spiral gate, including a support frame 1 and a gate plate 6. A lower mounting base 2 is fixedly connected to the side of the support frame 1. A through hole 3 is opened on the surface of the support frame 1. A side support frame 4 is fixedly connected to the top side of the support frame 1. A support plate 5 is fixedly connected to the middle position of the top of the support frame 1. The gate plate 6 is embedded inside the support frame 1. A connecting plate 7 is bolted to the top of the gate plate 6. A synchronous hydraulic cylinder 9 is installed on the surface of the lower mounting base 2. A sliding groove 10 is opened inside the support frame 1. First, the support frame 1 is installed and fixed. The synchronous hydraulic cylinder 9 pushes the upper mounting base 8 through the piston end, driving the connecting plate 6 to move the gate plate 6. The connecting plate 7 causes the gate plate 6 to rise and fall vertically along the slide groove 10, achieving reliable opening and closing. The radial reinforcing ribs and the cross reinforcing ribs work together to control the form and position tolerance of the support frame 1 and the gate plate 6 within 0.2mm. The 45° inclined stainless steel sealing strip and the polyurethane-metal composite sealing layer form a multi-seal, achieving the technical target of ≤6% pressure drop in 30 minutes. When the water pressure increases, the inclined structure generates a self-tightening effect to enhance the sealing performance. The dual cylinders are symmetrically arranged, and the displacement is synchronized through a PID controller. The piston end is connected to the upper mounting base 8 by a ball hinge to compensate for installation errors. The cylinders are arranged on both sides between the side support frame 4 and the support plate 5 to evenly transmit the hydraulic thrust to the gate plate 6.

[0019] Furthermore, two sets of side support frames 4 are symmetrically distributed, and two sets of support plates 5 are symmetrically distributed. Through the arrangement of side support frames 4 and support plates 5, during use, the two sets of symmetrically distributed side support frames 4 form a portal frame, which is rigidly connected with the support frame 1 to resist the lateral load when the gate plate 6 moves, limit the horizontal displacement of the gate plate 6 during the lifting process, and ensure the technical specification of form and position tolerance ≤0.2mm. Symmetrically arranged in the middle of the top, the thrust of the synchronous hydraulic cylinder 9 is evenly distributed to the overall structure of the support frame 1, and together with the side support frames 4, a double triangle stable structure is formed to prevent the frame from deforming under high water pressure. The side support frames 4 are located on the top side of the support frame 1, and the support plates 5 are arranged in the middle. The two form a force transmission closed loop through the connecting plate 7. The symmetrical distribution design eliminates stress concentration on one side and improves fatigue life.

[0020] Furthermore, the gate plate 6 is fitted inside the support frame 1 via the slide groove 10. The side of the gate plate 6 is provided with a 45° inclined stainless steel sealing strip. Through the setting of the gate plate 6, as the core moving part of the gate, it directly bears the 10 bar water pressure during use. The 45° inclined stainless steel sealing strip cooperates with the slide groove 10 to achieve dynamic sealing, ensuring the technical indicator that the pressure drop is ≤6% within 30 minutes. The gate plate 6 is made of steel plate and has cross reinforcing ribs inside, which transmit the driving force of the synchronous hydraulic cylinder 9 to the entire sealing surface, while resisting the deformation caused by high water pressure. The inclined sealing strip and the polyurethane-metal composite sealing layer form a triple sealing system. When the water pressure increases, a self-tightening effect is generated, and the sealing performance is enhanced with the increase of pressure. It is linked with the synchronous hydraulic cylinder 9 through the connecting plate 7. The synchronization error of the two cylinders is ≤0.3mm, ensuring that the vertical movement of the gate plate 6 is unobstructed. The guide structure of the slide groove 10 restricts the movement trajectory of the gate plate 6, and the double triangular frame composed of the side support frame 4 and the support plate 5 provides stable support.

[0021] Furthermore, two sets of connecting plates 7 are provided and positioned between the side support frame 4 and the support plate 5. Through the setting of the connecting plates 7, during use, they serve as rigid connecting parts between the gate plate 6 and the synchronous hydraulic cylinder 9, efficiently transmitting the thrust of the hydraulic cylinder piston end to the gate plate 6, driving it to vertically rise and fall within the slide groove 10, thereby realizing the opening and closing of the gate. The two sets of symmetrically distributed connecting plates 7 are located between the side support frame 4 and the support plate 5, and the hydraulic thrust is dispersed by bolt fixing, avoiding local stress concentration in the gate plate 6 and ensuring structural stability. The layout of the double connecting plates 7, combined with the PID control of the synchronous hydraulic cylinder 9, limits the deviation of the movement trajectory of the gate plate 6 to within ≤0.3mm, preventing the gate plate 6 from tilting and jamming due to uneven thrust.

[0022] Furthermore, the piston end of the synchronous hydraulic cylinder 9 is mounted on the surface of the upper mounting base 8. Through the setting of the synchronous hydraulic cylinder 9, as the core driving element of the gate, it drives the gate plate 6 to rise and fall vertically through the synchronous output of hydraulic thrust of the two cylinders during use, realizing reliable opening and closing operation under 10 bar high water pressure conditions. Its thrust output directly determines the dynamic sealing performance and response speed of the gate. The symmetrical layout of the two cylinders can evenly distribute the load and avoid gate plate 6 jamming or sealing failure caused by unilateral load. The piston rod end is rigidly connected to the gate plate 6 through the connecting plate 7, which efficiently converts the linear thrust into the vertical displacement of the gate plate 6. At the same time, the bolt fine-tuning design compensates for the installation tolerance and reduces unilateral load wear.

[0023] Furthermore, the slide groove 10 is embedded with a polyurethane-metal composite sealing layer. Through the setting of the slide groove 10, it serves as a rigid running track for the gate 6 during use. The vertical lifting trajectory of the gate 6 is constrained by the precision-machined guide surface, ensuring that there is no deviation or jamming during the movement process, and the synchronization accuracy is ≤0.3mm. The double slide grooves 10 form a symmetrical guiding system, which cooperates with the stainless steel strips on the side of the gate 6 to resist the lateral impact force caused by the high-pressure water flow (10 bar) and maintain the dynamic stability of the gate. The slide groove 10 is embedded with a 45° inclined sealing base, which forms a dynamic sealing pair with the sealing strips of the gate 6. The self-tightening effect is generated by hydraulic drive, and the higher the water pressure, the stronger the sealing performance.

[0024] Furthermore, the support frame 1 is made using an integral casting process and has radial reinforcing ribs inside. The gate plate 6 has cross reinforcing ribs inside. Through the setting of the support frame 1, it serves as the load-bearing skeleton of the main structure of the gate. The support frame 1 directly bears all the water pressure load (10 bar) transmitted by the gate plate 6, the slide 10 and the hydraulic system, and evenly transmits it to the foundation structure to prevent local stress concentration from causing deformation.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large high-pressure spiral gate, comprising a support frame (1) and a gate plate (6), characterized in that: The support frame (1) is fixedly connected to a lower mounting base (2) on its side. The support frame (1) has a through hole (3) on its surface. The support frame (1) is fixedly connected to a side support frame (4) on its top side. The support frame (1) is fixedly connected to a support plate (5) at the top middle position. The support frame (1) has a gate plate (6) embedded inside. The gate plate (6) is fixedly connected to a connecting plate (7) by bolts on its top. The lower mounting base (2) is equipped with a synchronous hydraulic cylinder (9). The support frame (1) has a sliding groove (10) inside.

2. The large high-pressure spiral gate according to claim 1, characterized in that: The side support frame (4) is provided in two symmetrically distributed sets, and the support plate (5) is provided in two symmetrically distributed sets.

3. A large high-pressure spiral gate according to claim 1, characterized in that: The gate (6) is fitted into the inside of the support frame (1) through the slide groove (10), and the side of the gate (6) is provided with a stainless steel sealing strip with a 45° bevel.

4. A large high-pressure spiral gate according to claim 1, characterized in that: The connecting plate (7) is provided in two sets and is located between the side support frame (4) and the support plate (5).

5. A large high-pressure spiral gate according to claim 1, characterized in that: The piston end of the synchronous hydraulic cylinder (9) is mounted on the surface of the upper mounting base (8).

6. A large high-pressure spiral gate according to claim 1, characterized in that: The groove (10) is embedded with a polyurethane-metal composite sealing layer.

7. A large high-pressure spiral gate according to claim 1, characterized in that: The support frame (1) is made by integral casting and has radial reinforcing ribs inside. The gate plate (6) has cross reinforcing ribs inside.

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