A screw conveyor with a blowout prevention gate for a shield machine

Abstract

The utility model provides a kind of spiral conveyor with anti-spray sluice gate for shield machine, including cylinder, spiral shaft is provided in cylinder, the one end of cylinder is installed with the driving device for the power of spiral shaft rotation is provided, the top of cylinder is installed with hoist device, the side of cylinder is installed with observation window, the bottom of one end of cylinder is provided with slag outlet, gate assembly is fixedly installed at slag outlet, first sealing strip, second sealing strip, third sealing strip, fourth sealing strip, fifth sealing strip, sixth sealing strip and graphite packing are formed in gate assembly Multiple sealing structure is formed, effectively strengthen the sealing effect and realize anti-spray, and inject sealing grease in sealing cavity, sealing grease not only can play the sealing effect, but also can lubricate first sealing strip and second sealing strip, effectively prolong the service life of first sealing strip and second sealing strip.

Description

Technical Field

[0001] This utility model belongs to the field of spiral conveyor technology, specifically relating to a storage container for pathological slides. Background Technology

[0002] With the rapid development of tunnel construction technology and theory in my country, and the increasing level of mechanization in construction, the number of tunnel projects using tunnel boring machines (TBMs) is growing rapidly. Among these projects, the screw conveyor is a crucial component of the TBM, primarily used for transporting excavated soil within the TBM's soil chamber. When tunnel boring machines (TBMs) are excavating in deep, water-rich strata, the pressure of mud and water in the soil chamber can reach 10 Bar. The sealing effect is crucial for the normal operation of the TBM. The screw conveyor is directly connected to the soil chamber. If the sealing system of the screw conveyor gate fails, a surge will occur, and mud and water will enter the TBM. This can cause the TBM to stop working or even flood the entire tunnel with mud. Currently, screw conveyors mainly consist of a cylinder, screw shaft, drive system, and muck discharge gate. The muck discharge gate mainly consists of a gate seat, gate plate, sealing system, and hydraulic cylinder. Due to defects in the gate sealing system, leakage is easy. Therefore, most screw conveyors currently use double gate muck discharge. Double gates increase the cost of screw conveyors, and the control of double gates is also more complex than that of single gates. Therefore, we provide a single-gate screw conveyor with good sealing performance. Utility Model Content

[0003] The purpose of this invention is to provide a screw conveyor for a tunnel boring machine with an anti-gushing gate, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a screw conveyor for a tunnel boring machine with an anti-gushing gate, comprising a cylinder, a screw shaft disposed inside the cylinder, a drive device for providing power for the rotation of the screw shaft installed at one end of the cylinder, a hoisting device installed at the top of the cylinder, an observation window installed on the side of the cylinder, a slag outlet opened at the bottom of the end of the cylinder located at the drive device, and a gate assembly fixedly installed at the slag outlet;

[0005] The gate assembly includes a gate seat, a mounting groove on the top of the gate seat, sliding plates on both sides of the mounting groove, a gate plate slidably mounted on the top of the sliding plates, a gate cover plate fixedly mounted on the top of the gate seat, and a through slag discharge port on the surface of the gate cover plate for sealing the slag discharge port. A bracket is fixedly mounted on one side of the gate seat and the gate cover plate, and the gate plate is slidably mounted to the bracket. Hydraulic cylinders are mounted on both the front and back of the gate cover plate, and the telescopic ends of the hydraulic cylinders are connected to a connecting piece. The connector is connected to the outer end of the gate plate. The bottom end of the gate cover plate is provided with a first sealing groove and a second sealing groove on the side of the slag discharge port. A first sealing strip and a second sealing strip are installed in the first sealing groove and the second sealing groove respectively. The gap between the first sealing strip, the second sealing strip and the gate plate and the gate cover plate forms a sealing cavity. A first channel communicating with the sealing cavity is provided inside the gate cover plate. A first connector is installed at the opening of the first channel on the gate cover plate. Sealing grease is injected into the sealing cavity through the first connector and the first channel.

[0006] As a preferred technical solution of this utility model, a third sealing groove is provided at one end of the gate cover plate and the gate seat located outside the gate plate. A third sealing strip is installed in the third sealing groove. A sealing plate is fixedly installed on the side of the gate cover plate and the gate seat. The sealing plate presses the third sealing strip. The sealing plate has a convex structure and a through hole for the gate plate to pass through is provided in the middle. A fourth sealing groove is provided in the through hole. A graphite packing is installed in the fourth sealing groove. A pressure plate is fixedly installed at the top and bottom of one end of the bracket. The pressure plate presses the graphite packing.

[0007] As a preferred technical solution of this utility model, a fifth sealing groove is provided at the top of one end of the gate seat, and a fourth sealing strip is installed in the fifth sealing groove, and the fourth sealing strip is pressed and fixed in the fifth sealing groove by the gate cover plate.

[0008] As a preferred technical solution of this utility model, a sixth sealing groove is formed on one end surface of the sealing plate located in the third sealing groove, and a fifth sealing strip is installed in the sixth sealing groove.

[0009] As a preferred technical solution of this utility model, the gate seat has a second channel inside, the bottom end of the sliding plate has a connecting hole that connects to the second channel, and the gate seat is equipped with a second connector at the opening of the first channel.

[0010] As a preferred technical solution of this utility model, a seventh sealing groove is provided on the surface of the gate cover plate, and a sixth sealing strip is installed in the seventh sealing groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the gate assembly forms a multi-seal structure by setting a first sealing strip, a second sealing strip, a third sealing strip, a fourth sealing strip, a fifth sealing strip, a sixth sealing strip, and a graphite packing, which effectively enhances the sealing effect and prevents jetting. In addition, the sealing grease injected into the sealing cavity can not only play a sealing role, but also lubricate the first and second sealing strips, effectively extending the service life of the first and second sealing strips. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the gate assembly in this utility model;

[0015] Figure 3 This is one of the cross-sectional structural schematic diagrams of the gate assembly in this utility model;

[0016] Figure 4 This is the second cross-sectional structural schematic diagram of the gate assembly in this utility model;

[0017] Figure 5 In this utility model Figure 4 Enlarged structural diagram at point A;

[0018] Figure 6 In this utility model Figure 4 A magnified structural diagram located at point B.

[0019] In the diagram: 1. Cylinder; 2. Spiral shaft; 3. Drive device; 4. Lifting device; 5. Observation window; 6. Gate assembly; 61. Gate seat; 62. Sliding plate; 63. Gate plate; 64. Gate cover plate; 65. Slag discharge port; 66. Support; 67. Hydraulic cylinder; 68. Connecting piece; 7. First sealing strip; 8. Second sealing strip; 9. Sealing cavity; 10. First channel; 11. First connector; 12. Third sealing strip; 13. Sealing plate; 14. Graphite packing; 15. Pressure plate; 16. Fourth sealing strip; 17. Fifth sealing strip; 18. Second channel; 19. Connecting hole; 20. Second connector; 21. Sixth sealing strip. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0021] Please see Figures 1-6 The present invention provides the following technical solution: a screw conveyor for a tunnel boring machine with an anti-gushing gate, comprising a cylinder 1, a screw shaft 2 disposed inside the cylinder 1, a drive device 3 for providing power for the rotation of the screw shaft 2 installed at one end of the cylinder 1, a hoisting device 4 installed at the top of the cylinder 1, an observation window 5 installed on the side of the cylinder 1, and a slag outlet opened at the bottom of the end of the cylinder 1 located at the drive device 3, and a gate assembly 6 fixedly installed at the slag outlet.

[0022] In this embodiment, the gate assembly 6 includes a gate seat 61. A mounting groove is provided on the top of the gate seat 61, and sliding plates 62 are installed on both sides of the mounting groove. A gate plate 63 is slidably mounted on the top of the sliding plates 62. A gate cover plate 64 is fixedly installed on the top of the gate seat 61 and is fixedly installed at the slag outlet. A through slag discharge port 65 is provided on the surface of the gate cover plate 64. The gate plate 63 is used to block the slag discharge port 65. A bracket 66 is fixedly installed on one side of the gate seat 61 and the gate cover plate 64. The gate plate 63 and the bracket 66 are slidably installed. Hydraulic cylinders 67 are installed on both the front and back of the gate cover plate 64. The extension and retraction ends of the hydraulic cylinders 67 are connected to the connecting... The connector 68 is connected to the outer end of the gate plate 63. The bottom end of the gate cover plate 64 is provided with a first sealing groove and a second sealing groove on the side of the slag discharge port 65. A first sealing strip 7 and a second sealing strip 8 are installed in the first sealing groove and the second sealing groove respectively. The gap between the first sealing strip 7, the second sealing strip 8 and the gate plate 63 and the gate cover plate 64 forms a sealing cavity 9. A first channel 10 communicating with the sealing cavity 9 is provided inside the gate cover plate 64. A first connector 11 is installed at the opening of the first channel 10 of the gate cover plate 64. Sealing grease is injected into the sealing cavity 9 through the first connector 11 and the first channel 10.

[0023] Specifically, the hydraulic cylinder 67, in conjunction with the connecting piece 68, can move the gate plate 63. The sliding plate 62 facilitates the sliding of the gate plate 63. When the hydraulic cylinder 67 moves the gate plate 63 outward, it opens the slag discharge port 65, facilitating slag discharge. The gate plate 63 can also seal the slag discharge port 65. The first sealing strip 7 and the second sealing strip 8 improve the sealing between the gate cover plate 64 and the gate plate 63, thereby reducing the risk of slag gushing during discharge. The first connector 11, in conjunction with the first channel 10, allows workers to inject sealing grease into the sealing cavity 9. The sealing grease not only provides a sealing function but also lubricates the first sealing strip 7 and the second sealing strip 8, effectively extending their service life.

[0024] In this embodiment, a third sealing groove is provided at one end of the gate cover plate 64 and the gate seat 61 located outside the gate plate 63. A third sealing strip 12 is installed in the third sealing groove. A sealing plate 13 is fixedly installed on the side of the gate cover plate 64 and the gate seat 61. The sealing plate 13 presses the third sealing strip 12. The sealing plate 13 has a "convex" structure and a through hole for the gate plate 63 to pass through in the middle. A fourth sealing groove is provided in the through hole. A graphite packing 14 is installed in the fourth sealing groove. A pressure plate 15 is fixedly installed at the top and bottom of one end of the bracket 66. The pressure plate 15 presses the graphite packing 14.

[0025] Specifically, the sealing plate 13 can press and fix the third sealing strip 12, and the third sealing strip 12 can improve the sealing between the gate cover plate 64 and the gate seat 61. The graphite packing 14 is mainly made of graphite wire reinforced by various reinforcing fibers and metal wires (steel wire, copper wire, nickel wire, carbon fiber, pre-oxidized fiber, glass yarn) and is suitable for dynamic sealing under high temperature and high pressure conditions. Therefore, the graphite packing 14 can improve the sealing effect on the gate plate 63 and further reduce the risk of slag gushing during the slag discharge process.

[0026] In this embodiment, a fifth sealing groove is provided at the top of one end of the gate seat 61, and a fourth sealing strip 16 is installed in the fifth sealing groove. The fourth sealing strip 16 is pressed and fixed in the fifth sealing groove by the gate cover plate 64.

[0027] Specifically, the fourth sealing strip 16 can improve the sealing performance between the gate cover plate 64 and the gate seat 61.

[0028] In this embodiment, a sixth sealing groove is formed on one end surface of the sealing plate 13 located in the third sealing groove, and a fifth sealing strip 17 is installed in the sixth sealing groove.

[0029] Specifically, the fifth sealing strip 17, in conjunction with the third sealing strip 12, can further improve the sealing performance of the gate seat 61 and the gate cover plate 64, thereby further reducing the risk of gushing during the slag discharge process.

[0030] In this embodiment, a second channel 18 is provided inside the gate seat 61, and a connecting hole 19 connecting the second channel 18 is provided at the bottom end of the sliding plate 62. A second connector 20 is installed at the opening of the first channel 10 on the gate seat 61.

[0031] Specifically, the staff can inject lubricating grease into the second channel 18 through the second connector 20. The lubricating grease can lubricate the sliding plate 62 through the connecting hole 19, which effectively reduces the friction between the gate plate 63 and the sliding plate 62, thereby improving the service life of the gate plate 63.

[0032] In this embodiment, a seventh sealing groove is provided on the surface of the gate cover plate 64, and a sixth sealing strip 21 is installed in the seventh sealing groove.

[0033] Specifically, the sixth sealing strip 21 can improve the sealing performance of the gate cover 64 when it is installed at the slag outlet.

[0034] Working principle: The gate assembly 6 has multiple sealing effects through the first sealing strip 7, the second sealing strip 8, the third sealing strip 12, the fourth sealing strip 16, the fifth sealing strip 17, the sixth sealing strip 21, the sealing cavity 9, and the graphite packing 14. This effectively enhances the sealing effect of the gate assembly 6 and thus prevents blowouts. In addition, sealing grease is injected into the sealing cavity 9. The sealing grease not only plays a sealing role, but also lubricates the first sealing strip 7 and the second sealing strip 8, effectively extending the service life of the first sealing strip 7 and the second sealing strip 8. Furthermore, in emergency situations, polyurethane can be injected into the sealing cavity 9, thereby effectively controlling the blowouts of the gate.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A screw conveyor for a tunnel boring machine with an anti-gushing gate, comprising a cylinder (1), characterized in that: The cylinder (1) is provided with a spiral shaft (2), and a drive device (3) is installed at one end of the cylinder (1) to provide power for the rotation of the spiral shaft (2). A hoisting device (4) is installed at the top of the cylinder (1), and an observation window (5) is installed on the side of the cylinder (1). A slag outlet is opened at the bottom of the cylinder (1) at one end of the drive device (3), and a gate assembly (6) is fixedly installed at the slag outlet. The gate assembly (6) includes a gate seat (61), the top of which has an installation groove, and sliding plates (62) are installed on both sides of the installation groove. A gate plate (63) is slidably mounted on the top of the sliding plates (62). A gate cover plate (64) is fixedly mounted on the top of the gate seat (61). The gate cover plate (64) is fixedly mounted at the slag outlet. A through slag discharge port (65) is opened on the surface of the gate cover plate (64). The gate plate (63) is used to block the slag discharge port (65). A bracket (66) is fixedly mounted on one side of the gate seat (61) and the gate cover plate (64). The gate plate (63) and the bracket (66) are slidably mounted. A hydraulic cylinder (67) is installed on both the front and back of the gate cover plate (64). The extension of the hydraulic cylinder (67) The constricted end is connected to the connector (68), and the connector (68) is connected to the outer end of the gate plate (63). The bottom end of the gate cover plate (64) is provided with a first sealing groove and a second sealing groove on the side of the slag discharge port (65). A first sealing strip (7) and a second sealing strip (8) are installed in the first sealing groove and the second sealing groove. The gap between the first sealing strip (7) and the second sealing strip (8) and the gate plate (63) and the gate cover plate (64) forms a sealing cavity (9). A first channel (10) communicating with the sealing cavity (9) is provided inside the gate cover plate (64). A first connector (11) is installed at the opening of the first channel (10) of the gate cover plate (64). Sealing grease is injected into the sealing cavity (9) through the first connector (11) and the first channel (10).

2. A screw conveyor for a tunnel boring machine with an anti-gushing gate as described in claim 1, characterized in that: The gate cover plate (64) and the gate seat (61) are both provided with a third sealing groove at one end outside the gate plate (63). A third sealing strip (12) is installed in the third sealing groove. A sealing plate (13) is fixedly installed on the side of the gate cover plate (64) and the gate seat (61). The sealing plate (13) presses the third sealing strip (12). The sealing plate (13) has a "convex" structure and a through hole for the gate plate (63) to pass through in the middle. A fourth sealing groove is provided in the through hole. A graphite packing (14) is installed in the fourth sealing groove. A pressure plate (15) is fixedly installed at the top and bottom of one end of the bracket (66). The pressure plate (15) presses the graphite packing (14).

3. A screw conveyor for a tunnel boring machine with an anti-gushing gate according to claim 1, characterized in that: A fifth sealing groove is provided at the top of one end of the gate seat (61), and a fourth sealing strip (16) is installed in the fifth sealing groove. The fourth sealing strip (16) is pressed and fixed in the fifth sealing groove by the gate cover plate (64).

4. A screw conveyor for a tunnel boring machine with an anti-gushing gate according to claim 2, characterized in that: The sealing plate (13) has a sixth sealing groove on one end surface of the third sealing groove, and a fifth sealing strip (17) is installed in the sixth sealing groove.

5. A screw conveyor for a tunnel boring machine with an anti-gushing gate according to claim 1, characterized in that: The gate seat (61) has a second channel (18) inside, and the bottom end of the sliding plate (62) has a connecting hole (19) that connects to the second channel (18). The gate seat (61) is equipped with a second connector (20) at the opening of the first channel (10).

6. A screw conveyor for a tunnel boring machine with an anti-gushing gate according to claim 1, characterized in that: The gate cover plate (64) has a seventh sealing groove on its surface, and a sixth sealing strip (21) is installed in the seventh sealing groove.

Images