Protective door sealing device and tunnel boring machine

Abstract

The utility model discloses a protective door sealing device and a tunnel boring machine. The problem that in the prior art, a movable door of a protective device is poor in reliability in large-gradient construction is solved. The sliding door comprises a fixed door body and a movable door body, a sliding rail is arranged on the fixed door body, a driving piece is connected to the movable door body, the movable door body moves along the sliding rail and relative to the fixed door body under the action of the driving piece, and a pressing mechanism used for pressing and fixing the movable door body and a limiting and supporting mechanism used for supporting the movable door body are further arranged on the fixed door body. According to the protective door sealing device, by means of the pressing mechanism and the limiting supporting mechanism, the movable door is effectively prevented from sliding off accidentally, and safety, reliability and sealing performance of the protective door sealing device are improved. When the protective door sealing device is applied to the tunnel boring machine, the problem that a protective door sealing device in the prior art cannot adapt to personnel and equipment protection under the large-gradient working condition is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel boring machines, in particular to a protective door sealing device and a tunnel boring machine. Background Art

[0002] At present, the first domestic pumped storage power station high-angle inclined shaft hard rock tunnel boring machine is being promoted in an orderly manner in the Luoning project, and has been advanced 680 meters since its launch. The tunnel boring machine digs along a horizontal upward large slope with a slope of 39°. The tunneling conditions are completely different from the horizontal tunneling of conventional equipment. In view of its special working conditions, it is necessary to add a protective door between the cutterhead flange and the drive box. The protective door has a through hole to facilitate the passage of materials and personnel and the replacement of the roller cutter in the later stage. The protective door can effectively separate the cutter compartment and the drive box, block the slag powder and water spray brought by the cutterhead when breaking the rock, and ensure the safe and reliable operation of some important equipment in the drive box. For this reason, a safe and reliable protective door sealing device needs to be set on the protective door to ensure that the protective door can play a protective role. The protective door sealing device is one of the important devices in the protective door. If the sealing device fails to play a sealing role, the function of the protective door will be greatly reduced. Therefore, a reliable sealing device will provide safety protection for the protective door. During the excavation process of the roadheader under the condition of a large upward slope, if the sealing device is not well made, the slag-water mixture can flow into the drive box through the protection system at any time. Once the slag-water mixture accumulates in the drive box, it will damage the internal seal of the drive.

[0003] In recent years, with the development of pumped storage power stations, there are more and more steep tunnels such as inclined shafts, which in turn accelerates the rapid development of steep tunnel boring machines such as inclined shafts. In the prior art, there is an inclined shaft tunnel boring machine and its protective device with publication number CN 116556972 A. Although the protective device can be used for inclined shaft tunnel boring machines, there is a risk of sliding of the moving door after the failure of the driving part during steep slope construction. Therefore, it is necessary to design a protective door sealing device that is simple to operate, safe, and reliable. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model provides a protective door sealing device and a tunnel boring machine, which solves the problem of poor reliability of the movable door of the protective device in the prior art during construction on a large slope.

[0005] The technical solution of the utility model is implemented as follows: a protective door sealing device includes a fixed door and a movable door, the fixed door is provided with a slide rail, the movable door is connected with a driving member, the movable door moves along the slide rail and relative to the fixed door under the action of the driving member, and the fixed door is also provided with a clamping mechanism for pressing the movable door and a limit support mechanism for supporting the movable door.

[0006] Furthermore, in order to improve the sealing performance between the fixed door and the movable door, a sealing member is provided between the fixed door and the movable door. Preferably, a sealing groove is provided on the fixed door and the sealing groove is provided around the through hole provided on the fixed door, and the sealing member is provided in the sealing groove. Preferably, the sealing member is a sealing strip with a D-shaped cross section.

[0007] As a preferred solution, the slide rail includes an upper slide rail and a lower slide rail which are arranged in parallel, and the movable door is arranged between the upper slide rail and the lower slide rail, and is slidably matched with the upper slide rail and the lower slide rail respectively.

[0008] Wherein, a left track is provided between the upper slide rail and the lower slide rail, and the left track is located at the closing position of the moving door. When the moving door is in the closed state, the moving door cooperates with the left track.

[0009] Preferably, the position limiting support mechanisms are respectively arranged on the upper slide rail and the lower slide rail, and support the movable door in a closed state.

[0010] As another optional solution, the slide rail includes an upper rack and a lower rack arranged in parallel, and the movable door is provided with gears respectively matching with the upper rack and the lower rack, and the gears are connected to the driving member.

[0011] Furthermore, the limiting support mechanism includes a limiting block, on which a locking bolt is threadedly connected, and the locking bolt is arranged in a direction perpendicular to the movable door; and is used to support the movable door.

[0012] Furthermore, the clamping mechanism includes a base arranged on the fixed door or the slide rail, the base is threadedly connected with a screw, the screw is threadedly connected with a pressure block, a pry rod is provided at one end of the screw passing through the pressure block, and the pressure block is connected to the fixed door through a limit piece.

[0013] A tunnel boring machine comprises the protective door sealing device, wherein the fixed door of the protective door sealing device is fixed on the cutter head flange so that the protective door sealing device can rotate with the cutter head.

[0014] The beneficial effects of the utility model are as follows: the protective door sealing device of the utility model effectively prevents the movable door from accidentally sliding down through the clamping mechanism and the limit support mechanism, thereby improving its safety, reliability and sealing. When the protective door sealing device is applied to a tunnel boring machine, when the cutterhead is excavating during the construction process, after the movable door of the protective door sealing device is closed, the cutterhead cutter compartment is separated from the drive box channel, and water, slag powder, and slag-water mixture are prevented from falling into the drive box, thereby providing a safe and tidy space; it not only solves the problem that the protective door sealing device in the prior art cannot adapt to the protection of personnel and equipment under large slope conditions, but also provides a protective door sealing device that is simple to operate, safe, and reliable, and has practical application significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the horizontal excavation state of a tunnel boring machine equipped with a protective door sealing device.

[0017] Figure 2 This is a schematic diagram of a tunnel boring machine equipped with a protective door sealing device while digging upward at a large slope.

[0018] Figure 3 for Figure 2 Center B view.

[0019] Figure 4 This is a schematic diagram of the sliding door in the open state.

[0020] Figure 5 It is a schematic diagram of the working status of the clamping mechanism.

[0021] Figure 6 Schematic diagram of the state where the protective door sealing device is rotated to the top of the cave wall.

[0022] Figure 7 This is a schematic diagram of the tightening status of the locking bolt on the limit block.

[0023] Figure 8 This is a schematic diagram of the state where the locking bolt on the limit block is not tightened.

[0024] Fig. 9 Schematic diagram of the seal arrangement.

[0025] Fig.10 This is a schematic diagram of the slide rail structure in Example 3.

[0026] Fig.11 The schematic diagram of the clamping mechanism is a bolt clamping mechanism. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 3As shown, in Example 1, a protective door sealing device includes a fixed door 1 and a movable door 2. The fixed door is provided with a through hole for facilitating the passage of materials and personnel. The fixed door 1 is provided with a slide rail, which can provide guidance for the movement of the movable door and reduce friction resistance. A driving member 8 is connected to the movable door 2. Under the action of the driving member 8, the movable door 2 moves along the slide rail and relative to the fixed door 1 to realize the opening and closing of the through hole. The fixed door 1 is also provided with a clamping mechanism 5 for pressing the movable door 2 and a limit support mechanism 11 for supporting the movable door 2. The clamping mechanism presses the movable door from both sides to ensure the safety of the sealed door in the closed state. The limit support mechanism can provide anti-drop support for the movable door in the closed state, effectively preventing the movable door from falling off when the driving member fails under large slope conditions, thereby improving reliability.

[0029] As a preferred solution, Fig. 9 As shown, in order to further improve the sealing performance between the fixed door and the movable door, a sealing member 7 is provided between the fixed door 1 and the movable door 2. Specifically, a sealing groove is provided on the fixed door 1 and the sealing groove is provided around the through hole 1-1 provided on the fixed door 1, and the sealing member 7 is provided in the sealing groove. That is, the sealing member 7 is arranged around the through hole of the fixed door in the circumferential direction, and the through hole of the fixed door is fully sealed. The sealing member 7 is a sealing strip with a D-shaped cross section, that is, the sealing member adopts a D-shaped seal to improve the sealing effect.

[0030] like Figure 4 As shown, embodiment 2 is a protective door sealing device. The slide rails in this embodiment include an upper slide rail 3 and a lower slide rail 4 arranged in parallel. The upper slide rail 3 and the lower slide rail 4 are detachably connected to the fixed door, and provide guidance for the movement of the mobile door. The mobile door 2 is arranged between the upper slide rail 3 and the lower slide rail 4, and slides with the upper slide rail 3 and the lower slide rail 4 respectively; under the action of the driving member 8, the mobile door 2 slides smoothly between the upper slide rail 3 and the lower slide rail 4 to realize the opening and closing of the through hole. In this embodiment, the driving member can be a cylinder.

[0031] Furthermore, a left track 6 is provided between the upper slide rail 3 and the lower slide rail 4, and the left track 6 is located at the closed position of the moving door 2. When the moving door 2 is in the closed state, the moving door 2 cooperates with the left track 6. That is, when the moving door is in the fully closed state, its left end is just located in the left track, and the left track provides a limit for the opening of the moving door, ensuring that the moving door can be opened and closed smoothly.

[0032] In this embodiment, the position-limiting support mechanism 11 is respectively arranged on the upper slide rail 3 and the lower slide rail 4, and supports the moving door 2 in the closed state. That is, when the moving door is in the closed state, the position-limiting support mechanism provides contact support for the moving door to prevent the moving door from failing and falling; when the moving door is in the open state, the position-limiting support mechanism 11 does not work and does not affect the smooth movement of the moving door 2.

[0033] As a further preferred solution, Figure 7 , 8 As shown, the position-limiting support mechanism 11 comprises a position-limiting block 1101, and a locking bolt 1102 is threadedly connected to the position-limiting block 1101, and the locking bolt 1102 is arranged along the direction perpendicular to the movable door 2. In this embodiment, the position-limiting blocks are respectively fixed on the upper slide rail 3 and the lower slide rail 4, and when the movable door is in a closed state, the locking bolt is rotated so that the locking bolt extends out of the position-limiting block and supports the lower part of the movable door, effectively preventing the movable door from failing to slip or accidentally opening under a large slope condition.

[0034] The other structures are the same as those in Example 1.

[0035] Embodiment 3, as Fig.10 As shown, the difference between this embodiment and embodiment 2 is that the slide rail in this embodiment includes an upper rack 31 and a lower rack 32 arranged in parallel, the upper rack 31 and the lower rack 32 play a guiding role, and the upper rack 31 and the lower rack 32 are detachably connected to the fixed door. The movable door 2 is provided with a gear 21 respectively matched with the upper rack 31 and the lower rack 32, and the gear 21 is connected to the driving member 8; in this embodiment, the driving member is preferably a motor. The driving member drives the movable door to move relative to the fixed door by driving the gear to rotate along the upper and lower racks, thereby realizing the smooth opening and closing of the movable door.

[0036] In this embodiment, as a preferred solution: Figure 4 As shown, the clamping mechanism 5 includes a base 5-4 arranged on the fixed door 1 or the slide rail; in this embodiment, the base is fixed on the fixed door as an example; the base is located on both sides of the upper and lower slide rails, and one or more bases can be arranged on each side as needed. A screw 5-5 is threadedly connected to the base 5-4, and a pressure block 5-3 is threadedly connected to the screw 5-5. A pry bar 5-1 is provided at one end of the screw 5-5 passing through the pressure block 5-3, and the pressure block 5-3 is connected to the fixed door 1 through a limiter 5-2; the limiter can be a rope to prevent the pressure block from failing and sliding. The pressure block can rotate around the screw so that it can be pressed on the mobile door. Through the transmission of force, the mobile door can be fully pressed on the fixed door. When the mobile door needs to be opened, the pressure block must be turned away from the mobile door first, and then moved under the action of the driving member. The pressure block can be tightened by using the pry bar provided on the clamping mechanism. The pry bar can be removed and installed when working. The pressure block can press the mobile door against the fixed door to provide an axial clamping effect. When the cutter disc needs to be inspected, the equipment is shut down and the cutter disc stops rotating. The crowbar on the pressure block is used to loosen the pressure block mechanism. At this time, the oil cylinder drives the moving door to open, and personnel can enter the cutter disc compartment.

[0037] In addition, if Fig.11 As shown, the clamping mechanism 5 can also adopt a bolt clamping mechanism, which uses bolts to clamp the movable door, and can also clamp the movable door to ensure its safety and reliability.

[0038] The other structures are the same as those in Example 2.

[0039] Example 4: Figure 1 , 2 As shown, a tunnel boring machine includes the protective door sealing device. The tunnel boring machine can be an inclined shaft tunnel boring machine. When the cutter disc excavates forward horizontally, it can effectively prevent slag powder and dust from entering the drive box; during the process of the cutter disc excavating obliquely upward, if the protection is not in place, the slag powder on the top of the cave wall and the face, as well as the water spray in the cutter chamber, can fall into the drive box through various gaps on the protective door at any time, damaging the drive inner seal 10; therefore, the use of the protective door sealing device can solve the above problems well. The fixed door 1 of the protective door sealing device is fixed on the cutter disc flange 9, so that the protective door sealing device can rotate with the cutter disc. The protective door sealing device completely separates the cutter disc cutter chamber from the drive box channel, effectively preventing slag powder, water, and slag-water mixture at the cutter chamber and the face from entering the drive box and the inner case, so it has dustproof, slag-proof and waterproof functions. When the drive member adopts an oil cylinder, the entire protective door sealing device will rotate with the cutter disc. During the rotation process, the oil pipe of the oil cylinder has been removed and only the quick-connect connector is left on the protective door sealing device. In order to prevent the sudden pressure release of the oil cylinder during rotation, which may cause the moving door to slide or open, the limit blocks are fixed on the upper and lower tracks, and the locking bolts are screwed on the limit blocks to prevent the moving door from sliding or opening. Figure 4 The moving door is in the open state. Before the moving door is opened, the pressing block of the pressing block mechanism needs to be loosened and rotated to a certain angle, as shown in the figure. At this time, the moving door is opened along the upper and lower tracks under the drive of the oil cylinder. Figure 5 This is the working state of the pressing block clamping mechanism. When the moving door is closed, the pressing block clamping mechanism also starts to work. Figure 6 To protect the door seal device from turning to the top of the hole wall, if the cylinder suddenly releases pressure at this moment, the sliding door may slide down. Therefore, when the sliding door in the protective door seal device is closed, tightening the locking bolt on the limit block can prevent the sliding door from accidentally sliding down.

[0040] The other structures are the same as those in Example 2 or 3.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective door sealing device, comprising a fixed door (1) and a movable door (2), characterized in that: The fixed door (1) is provided with a slide rail, the movable door (2) is connected with a driving member (8), the movable door (2) moves along the slide rail and relative to the fixed door (1) under the action of the driving member (8), and the fixed door (1) is also provided with a pressing mechanism (5) for pressing the movable door (2) and a limit support mechanism (11) for supporting the movable door (2).

2. The protective door sealing device according to claim 1, characterized in that: A sealing member (7) is provided between the fixed door (1) and the movable door (2).

3. The protective door sealing device according to claim 2, characterized in that: The fixed door (1) is provided with a sealing groove, and the sealing groove is arranged along the periphery of a through hole (1-1) arranged on the fixed door (1), and a sealing member (7) is arranged in the sealing groove.

4. The protective door sealing device according to any one of claims 1 to 3, characterized in that: The slide rails comprise an upper slide rail (3) and a lower slide rail (4) which are arranged in parallel, and the movable door (2) is arranged between the upper slide rail (3) and the lower slide rail (4) and is slidably matched with the upper slide rail (3) and the lower slide rail (4) respectively.

5. The protective door sealing device according to claim 4, characterized in that: A left track (6) is provided between the upper slide track (3) and the lower slide track (4), and the left track (6) is located at the closed position of the movable door (2). When the movable door (2) is in the closed state, the movable door (2) cooperates with the left track (6).

6. The protective door sealing device according to claim 5, characterized in that: The position-limiting support mechanisms (11) are respectively arranged on the upper slide rail (3) and the lower slide rail (4), and support the movable door (2) in a closed state.

7. The protective door sealing device according to any one of claims 1 to 3, characterized in that: The slide rail comprises an upper rack (31) and a lower rack (32) arranged in parallel, and a gear (21) respectively matched with the upper rack (31) and the lower rack (32) is provided on the movable door (2), and the gear (21) is connected to the driving member (8).

8. The protective door sealing device according to claim 1 or 6, characterized in that: The position-limiting support mechanism (11) comprises a position-limiting block (1101), on which a locking bolt (1102) is threadedly connected, and the locking bolt (1102) is arranged along the direction of the vertically movable door (2).

9. The protective door sealing device according to claim 1, characterized in that: The clamping mechanism (5) comprises a base (5-4) arranged on the fixed door (1) or the slide rail, a screw rod (5-5) being threadedly connected to the base (5-4), a pressing block (5-3) being threadedly connected to the screw rod (5-5), a pry rod (5-1) being provided at one end of the screw rod (5-5) passing through the pressing block (5-3), and the pressing block (5-3) being connected to the fixed door (1) via a stopper (5-2).

10. A tunnel boring machine, characterized in that: It comprises a protective door sealing device as claimed in any one of claims 1 to 9, wherein the fixed door (1) of the protective door sealing device is fixed on a cutter disc flange (9) so that the protective door sealing device can rotate with the cutter disc.

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