CN216077113U - Open type TBM sealing device suitable for water-rich broken stratum - Google Patents

Abstract

The utility model discloses an open TBM sealing device suitable for a water-rich broken stratum, which comprises an outer sealing component and an inner sealing component which are matched with each other, wherein the outer sealing component comprises an outer sealing dustproof mechanism and a small cyclone dust removal mechanism; the small cyclone dust removal mechanism comprises a temporary settling chamber, a dust outlet, a small cyclone dust collector and a cyclone dust outlet channel, wherein the cyclone dust outlet channel is formed in the outer pressing ring; this device is through setting up the gyration number of times that outer seal subassembly and inner seal subassembly optimize the labyrinth seal chamber and reduce the invasion of grit granule and slow down TBM seal failure, and with the cooperation of the dustproof subassembly of inner seal, for seal structure provides dual guarantee, have dustproof, the effectual, convenient construction's of sand control stone granule characteristics.

Description

Open type TBM sealing device suitable for water-rich broken stratum

Technical Field

The utility model relates to the technical field of shield machine sealing equipment, in particular to an open type TBM sealing device suitable for a water-rich broken stratum.

Background

The shield method is a fully mechanical construction method in the construction of the undercut method, it is to advance the shield machinery in the ground, prevent the collapse to the tunnel in taking place through shield outer casing and pipe sheet support surrounding rock, excavate the soil body with the cutting device in front of the excavation face at the same time, transport out of the hole through the unearthing machinery, lean on the jack to pressurize and jack in the rear portion, and assemble the precast concrete pipe sheet, form a mechanical construction method of the tunnel structure;

in the process of constructing the diversion tunnel by adopting the open TBM, the rapid abrasion and frequent failure of a bee system of the TBM are easily caused due to the high content of the sand and stone in the fissure water developed in the tunnel, and in order to reduce the invasion of the sand and stone particles in the fissure water into the sealing cavity and slow down the failure of the TBM seal, the sealing structure of the open TBM at the water-rich broken bottom layer needs to be improved.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing problems, the utility model aims to provide an open type TBM sealing device suitable for a water-rich broken stratum, the device optimizes the revolution times of a labyrinth seal cavity and reduces the invasion of sandstone particles to slow down TBM sealing failure by arranging an outer sealing component and an inner sealing component, the device is matched with an inner sealing dustproof component to achieve a dustproof effect, the sealing effect of grease on the sandstone in water is improved by replacing TBM sealing lubricating grease, double guarantee is provided for a sealing structure, and the device has the characteristics of good dustproof and sand control stone particle effect and convenience in construction.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

an open type TBM sealing device suitable for a water-rich broken stratum comprises an outer sealing assembly and an inner sealing assembly which are matched with each other, wherein the outer sealing assembly comprises an outer sealing dustproof mechanism and a small cyclone dust removal mechanism; the small cyclone dust removal mechanism comprises a temporary settling chamber, a dust outlet, a small cyclone dust collector and a cyclone dust outlet channel, wherein the cyclone dust outlet channel is formed in an outer pressing ring, the small cyclone dust collector is arranged at the tail end of the inner side end of the cyclone dust outlet channel, the dust outlet is arranged at the outer side end of the cyclone dust outlet channel, and the temporary settling chamber is formed by the outer pressing ring and an anti-settling labyrinth.

Preferably, the outer sealing dustproof mechanism comprises an outer sealing dustproof mounting ring and a dustproof sealing brush, the outer sealing dustproof mounting ring is mounted on the outer compression ring through M8 × 45 connecting screws, and the dustproof sealing brush is mounted in a mounting groove of the outer sealing dustproof mounting ring.

Preferably, the dustproof sealing brush is arranged in a mounting groove of a 6-section external sealing dustproof mounting ring at the bottom of the cleaning cutter head.

Preferably, the inner sealing assembly comprises an inner sealing rubber gasket and a gasket ring, and the inner sealing rubber gasket is mounted on the inner sealing labyrinth through M16 x 35 screws.

Preferably, the inner sealing rubber pad is made of a polyurethane plate material;

the backing ring is made of 402 stainless steel material;

the outer sealed dustproof mounting ring is made of 42 chromium molybdenum materials; the dustproof sealing brush is made of a polyurethane material.

The utility model has the beneficial effects that: the utility model discloses an open type TBM sealing device suitable for a water-rich broken stratum, which is improved in that:

the utility model designs an open type TBM sealing device suitable for a water-rich broken stratum, which comprises an outer sealing assembly and an inner sealing assembly which are matched with each other, wherein when the device is used, the outer sealing assembly and the inner sealing assembly are arranged to optimize the revolution times of a labyrinth sealing cavity and reduce the invasion of sand and stone particles to slow down the sealing failure of the TBM, so that the dustproof effect is achieved, the sealing lubricating grease of the TBM is replaced, the blocking effect of grease on sand and stone in water is improved, double guarantee is provided for the sealing structure, and the open type TBM sealing device has the advantages of good dustproof and sand and stone particle prevention effects and convenience in construction.

Drawings

Fig. 1 is an assembly view of an upper ring outer sealing dustproof mechanism of the utility model.

Fig. 2 is an assembly view of the lower ring outer sealing dustproof mechanism of the utility model.

Fig. 3 is an assembly view of the inner seal dust seal assembly of the present invention.

Wherein: 1. the device comprises an outer compression ring, 2 a temporary settling chamber, 3 a dustproof sealing installation ring, 4 a dustproof seal, 5 an anti-settling labyrinth, 6 a dust outlet, 7 a small cyclone dust collector, 8 a cyclone dust outlet channel, 9 an inner sealing rubber pad, 10 an inner sealing labyrinth and 11M 16 & 35 screws.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.

Referring to the attached drawings 1-3, the open type TBM sealing device suitable for the water-rich broken stratum comprises an outer sealing assembly and an inner sealing assembly which are matched with each other, the outer sealing assembly comprises an outer sealing dustproof mechanism and a small cyclone dust removal mechanism, when the device is used, the structural size of a TBM labyrinth sealing cavity is optimized by the inner sealing assembly, the revolution times of the labyrinth sealing cavity are increased, and the invasion of sand and stone particles is reduced, the outer sealing assembly accelerates sand and stone through a cyclone dust outlet channel by using the small cyclone dust removal mechanism, the angular velocity and the radius are increased in a gradient manner, the centrifugal force is further increased, sand and stone enter a temporary settling chamber through a dust outlet, and accordingly the stone and the stone in a cutter head are emptied.

Preferably, small-size cyclone dust removal mechanism includes temporary settling chamber 2, goes out dirt mouth 6, small-size cyclone 7, whirlwind goes out dirt passageway 8 and sets up on clamp ring 1 outward, small-size cyclone 7 sets up at 8 medial extremity end terminal ends of whirlwind play dirt passageway, it sets up at the outside terminal of whirlwind play dirt passageway 8 to go out dirt mouth 6, temporary settling chamber 2 is formed with anti-settling labyrinth 5 by outer clamp ring 1, when carrying out the sediment operation promptly, opens the motor switch of small-size cyclone 7, and the stone sediment goes out dirt passageway 8 through whirlwind and accelerates, and angular velocity and radius are the gradient increase, and centrifugal force and then increase, in getting into temporary settling chamber 2 through going out dirt mouth 6, then carries out centralized processing to the stone sediment.

Preferably, the outer sealing dustproof mechanism is used for preventing dust and stone slag from entering and comprises an outer sealing dustproof mounting ring 3 and a dustproof sealing brush 4, the outer sealing dustproof mounting ring 3 is mounted on the outer compression ring 1 through M8 × 45 connecting screws, and the dustproof sealing brush 4 is mounted in a mounting groove of the outer sealing dustproof mounting ring 3.

Preferably, in order to install the dustproof sealing brush 4, a mounting groove is formed in the 6 sections of external sealing dustproof mounting rings at the bottom of the cleaning cutter head, and the dustproof sealing brush 4 is mounted in the mounting groove.

Preferably, the inner sealing assembly comprises an inner sealing rubber gasket 9 and a gasket ring, and the inner sealing rubber gasket 9 is mounted on the inner sealing labyrinth 10 through M16 × 35 screws 11.

Preferably, the inner sealing rubber pad 9 is made of a polyurethane plate material; the backing ring is made of 402 stainless steel material; the outer sealed dustproof mounting ring 3 is made of 42 chromium molybdenum materials; the dustproof sealing brush 4 is made of polyurethane materials.

The specific use process and use principle of the open type TBM sealing device suitable for the water-rich fractured formation comprise the following steps:

the method comprises the following steps: stage for installing TBM upper ring outer seal by utilizing box with cutterhead back observation port

S101, equally cutting the outer sealing dustproof mounting ring 3 into 15 sections, and cutting each section of ring into two sections along the center position of each section of ring;

s102, drilling a connecting hole on the outer compression ring 1;

s103, mounting the 30 sections of outer sealing dustproof mounting rings 3 on the TBM outer compression ring 1 one by penetrating 30M 8-45 connecting screws through connecting holes;

step two: TBM lower ring outer sealing stage

S201, welding 3 positions of each section of outer sealing dustproof mounting ring 3 and a lower ring cutter head, wherein the welding length of each position is not less than 8 cm;

s202, after the outer sealing dustproof mounting ring 3 is mounted, manually controlling the cutter head to rotate anticlockwise for 12 degrees, and then mounting the next outer sealing dustproof mounting ring 3 until all the mounting rings are mounted;

s203, cleaning the installation groove of the outer sealing dustproof installation ring 3 at the section 6 at the bottom of the cutter head, and inserting the dustproof sealing brush 4 into the installation ring along the installation groove (in the process of the step S101, the installation groove needs to be formed in the outer sealing dustproof installation ring 3);

step three: TBM cutter ring dust removal device installation stage

A cyclone dust outlet channel 8 is formed in the outer compression ring 1, a small-sized cyclone dust collector 7 is installed at the tail end of the cyclone dust outlet channel 8, and the outer compression ring 1 and the anti-settling labyrinth 5 form a temporary settling chamber 2 at a dust outlet 6 of the cyclone dust outlet channel 8;

step four: the slag discharging stage in the cutter head comprises two slag discharging modes

(1) Rotating to discharge slag: rotating the TBM cutter head, starting the conveyer belt, and emptying the ballast in the cutter head by using gravity in the rotating process of the TBM cutter head;

(2) cyclone deslagging: a motor switch of the small-sized cyclone dust collector 7 is turned on, the stone slag is accelerated through the cyclone dust outlet channel 8, the angular velocity and the radius are increased in a gradient manner, the centrifugal force is further increased, and the stone slag enters the temporary settling chamber 2 through the dust outlet 6, so that the stone slag is conveniently subjected to centralized treatment;

step five: TBM cutter head inner sealing stage

S501, cutting off 15cm of a slag receiving hopper close to the inner seal, and removing 10 sections of inner labyrinth rings at the position where the slag receiving hopper is cut off;

s502, after the labyrinth rings are removed, additionally arranging 3M 16 bolt holes in the positions of backing ring bolt holes corresponding to each section of labyrinth ring;

s503, reinstalling the labyrinth ring with the opened hole on the main drive;

s504, fixing the backing ring and the inner sealing rubber pad 9 on the labyrinth ring by using M16 x 35 screws, and welding and recovering the slag receiving hopper;

s505, replacing a TBM sealing grease material;

wherein: the TBM sealing grease material is HBW black grease.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a be applicable to broken stratum open-type TBM sealing device of rich water which characterized in that: the sealing device comprises an outer sealing assembly and an inner sealing assembly which are matched with each other, and the outer sealing assembly comprises an outer sealing dustproof mechanism and a small cyclone dust removal mechanism; the small-sized cyclone dust removal mechanism comprises a temporary settling chamber (2), a dust outlet (6), a small-sized cyclone dust collector (7) and a cyclone dust outlet channel (8), wherein the cyclone dust outlet channel (8) is formed in an outer pressing ring (1), the small-sized cyclone dust collector (7) is arranged at the tail end of the inner side end of the cyclone dust outlet channel (8), the dust outlet (6) is arranged at the outer end of the cyclone dust outlet channel (8), and the temporary settling chamber (2) is formed by the outer pressing ring (1) and a sinking-preventing labyrinth (5).

2. The device for sealing the water-rich fractured stratum open type TBM according to claim 1, wherein: the outer sealing dustproof mechanism comprises an outer sealing dustproof mounting ring (3) and a dustproof sealing brush (4), the outer sealing dustproof mounting ring (3) is mounted on the outer compression ring (1) through M8-45 connecting screws, and the dustproof sealing brush (4) is mounted in a mounting groove of the outer sealing dustproof mounting ring (3).

3. The device for sealing the water-rich fractured stratum open type TBM according to claim 2, wherein: the dustproof sealing brush (4) is arranged in the mounting groove of the 6 sections of external sealing dustproof mounting rings (3) at the bottom of the cleaning cutter head.

4. The device for sealing the water-rich fractured stratum open type TBM according to claim 3, wherein: the inner sealing assembly comprises an inner sealing rubber gasket (9) and a gasket ring, wherein the inner sealing rubber gasket (9) is arranged on the inner sealing labyrinth (10) through M16-35 screws (11).

5. The device for sealing the water-rich fractured stratum open type TBM according to claim 4, wherein:

the inner sealing rubber pad (9) is made of polyurethane plate material; the backing ring is made of 402 stainless steel material;

the outer sealed dustproof mounting ring (3) is made of 42 chromium molybdenum materials;

the dustproof sealing brush (4) is made of a polyurethane material.

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