CN109611104B

CN109611104B - Muck modifier injection device for shield excavation

Info

Publication number: CN109611104B
Application number: CN201811481680.8A
Authority: CN
Inventors: 陈涛; 李明宇; 王珍; 白杨; 刘军
Original assignee: Huanghe Science and Technology College
Current assignee: Huanghe Science and Technology College
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2020-01-07
Anticipated expiration: 2038-12-05
Also published as: CN109611104A; CN111075458B; CN111075459A; CN111075458A

Abstract

The invention discloses a muck modifier injection device for shield excavation, and relates to the technical field of medium conveying devices. The invention comprises a spray head, a nozzle ring, a middle supporting plate and an elastic sealing plate, wherein an upper raceway is fixed on the peripheral side surface of a pressure ring, a nozzle mechanism matched with the upper raceway is arranged at the top of the upper raceway, a connecting ring is fixed at the bottom of the nozzle mechanism through screws, and a lower raceway matched with the upper raceway is fixed on the connecting ring through screws. According to the invention, through the use of the nozzle mechanism, the modifier can be uniformly sprayed into the slag soil around the nozzle mechanism through the nozzle, and the surrounding slag soil is stirred and crushed through the cross scraper and the protective knife, so that the modifier and the slag soil are mixed more uniformly, and the problems of mud cake formation of a cutter head and wrapping of a screw machine are avoided; the shower nozzle ring cap can block dregs direct action in spout rubber, avoids the excessive wearing and tearing of rubber to cause sealed inefficacy, perhaps leads to the appearance of the not enough condition of sealed resilience force of rubber because dregs are more.

Description

Muck modifier injection device for shield excavation

Technical Field

The invention belongs to the technical field of medium conveying devices, and particularly relates to a muck modifier injection device for shield excavation.

Background

The shield constructs the machine and is the main equipment that carries out tunnel construction, and the shield constructs the machine and is a cylindrical steel subassembly, and when using the shield to construct, the shield constructs the machine and pushes away the limit along the tunnel axis limit forward and cut the soil body, and the casing of shield constructs the machine is the shield, and the shield plays the effect of temporary support to the tunnel hole section that the shield constructs the machine cutting and has not lined up yet, and the cutting of shield constructs the machine, arrange soil and the lining is all gone on under the shield of shield.

During the construction of the earth pressure balance type shield, a soil body is often required to be injected with a muck modifier, and the muck modifier is conveyed to the cutter head through a center rotary joint at the front part of the shield machine, so that the problems of mud cake formation of the cutter head and wrapping of a screw machine caused by muck entering an earth bin of the shield machine are solved.

However, in actual construction, the problems that the muck modifier is conveyed to the cutter head to inject the muck modifier into the soil body only through the central rotary joint at the front part of the shield tunneling machine, the muck modifier cannot be modified in place, and the problems of mud cake formation of the cutter head and wrapping of a screw machine still occur; and the rubber sealing resilience of the existing slag soil modifier nozzle is insufficient, and the rubber sealing resilience is easy to wear or tear in the slag soil, so that the sealing failure is caused, and the slag soil modifier nozzle is blocked.

Disclosure of Invention

The invention aims to provide a muck modifier injection device for shield excavation, which solves the problems that the existing muck modifier injection device can not inject the muck modifier in place, the rubber of a nozzle of the muck modifier is easy to wear or tear, the sealing effect is poor or fails, and the nozzle is blocked.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a muck modifier injection device for shield excavation, which comprises a spray head, a nozzle ring, a middle supporting plate arranged in the middle of the nozzle ring and an elastic sealing plate pressed on the nozzle ring through a pressing ring, wherein the elastic sealing plate is made of polyurethane, a protection one-way valve is arranged in an internal channel of the spray head, an upper raceway is fixed on the peripheral side surface of the pressing ring, a nozzle mechanism matched with the upper raceway is arranged at the top of the upper raceway, a connecting ring is fixed at the bottom of the nozzle mechanism through screws, and a lower raceway matched with the upper raceway is fixed on the connecting ring through screws.

The nozzle mechanism comprises a nozzle ring cap, an injection channel is formed in the axis of the nozzle ring cap, a nozzle communicated with the injection channel is formed in the peripheral side face of the nozzle ring cap, a cross-shaped scraper is fixed to the top of the nozzle ring cap, a protection knife matched with the nozzle is fixed to the peripheral side face of the nozzle ring cap, and an inner limiting ring is arranged on the nozzle ring cap.

Furthermore, the side surface of the middle supporting plate is of a boss conical structure, through holes are uniformly distributed in the circumference of the middle supporting plate, the inner surface of the elastic sealing plate is of a conical surface structure matched, attached and sealed with the middle supporting plate, the elastic sealing plate comprises a first fan-shaped sealing plate and a second fan-shaped sealing plate which are matched, attached and complemented, the sum of the central angle alpha of the first fan-shaped sealing plate and the central angle beta of the second fan-shaped sealing plate is 360 degrees, and alpha is more than 90 degrees and less than 180 degrees.

Furthermore, a limiting pin is arranged at the top of the upper rolling path, and a limiting hole matched with the limiting pin is formed in the limiting ring.

Furthermore, balls are arranged between the upper rolling way and the lower rolling way, grooves matched with the balls are formed in the bottom of the upper rolling way and the top of the lower rolling way, and the balls are arranged in the grooves between the upper rolling way and the lower rolling way in an annular equidistant mode.

Furthermore, the protection knife is of a U-shaped structure, and convex teeth are arranged on the cross scraper.

Further, the nozzle ring is connected with the pressure ring through a bolt.

Furthermore, the outer edge of the elastic sealing plate is matched and pressed between the nozzle ring and the pressing ring.

The invention has the following beneficial effects:

1. according to the invention, through the use of the nozzle mechanism, the modifier can be uniformly sprayed into the slag soil around the nozzle mechanism through the nozzle, and the surrounding slag soil is stirred and crushed through the cross scraper and the protective knife, so that the modifier and the slag soil are mixed more uniformly, a good injection effect is achieved, and the problems of mud cake formation of a cutter head and wrapping of a screw machine are avoided; and the shower nozzle ring cap can block dregs direct action in spout rubber, avoids the excessive wearing and tearing of rubber to cause sealed inefficacy, perhaps leads to the appearance of the not enough condition of sealed resilience force of rubber because dregs are more.

2. According to the invention, the protection knife is arranged at the nozzle, so that the injection channel is prevented from being blocked due to the fact that the muck enters the injection channel from the nozzle.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a muck modifier injection device for shield excavation according to the present invention;

FIG. 2 is a schematic view of the nozzle mechanism of the present invention;

FIG. 3 is a schematic bottom view of FIG. 2;

FIG. 4 is a schematic view of the structure of the elastic sealing plate of the present invention;

FIG. 5 is a schematic view of a portion of FIG. 4 taken at A-A;

FIG. 6 is a schematic structural view of a stay plate according to the present invention;

FIG. 7 is a schematic view of a portion of FIG. 6 at B-B;

in the drawings, the components represented by the respective reference numerals are listed below:

1-nozzle, 2-nozzle ring, 3-middle supporting plate, 301-through hole, 4-press ring, 5-elastic sealing plate, 501-fan-shaped sealing plate I, 502-fan-shaped sealing plate II, 6-upper raceway, 601-limiting pin, 7-nozzle mechanism, 701-nozzle ring cap, 702-injection channel, 703-nozzle, 704-cross scraper, 705-protective knife, 706-limiting ring, 707-limiting hole, 8-connecting ring, 9-lower raceway and 10-ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the invention relates to a muck modifier injection device for shield excavation, which comprises a nozzle 1, a nozzle ring 2, a middle support plate 3 arranged in the middle of the nozzle ring 2, and an elastic sealing plate 5 pressed on the nozzle ring 2 through a pressing ring 4, wherein the elastic sealing plate 5 is made of polyurethane, a protection one-way valve is arranged in an internal channel of the nozzle 1 to prevent fluid in muck from flowing backward into the nozzle, an upper raceway 6 is fixed on the peripheral side surface of the pressing ring 4, a nozzle mechanism 7 matched with the upper raceway 6 is arranged at the top of the upper raceway 6, a connecting ring 8 is fixed at the bottom of the nozzle mechanism 7 through screws, and a lower raceway 9 matched with the upper raceway 6 is fixed on the connecting ring 8 through screws.

The nozzle mechanism 7 comprises a spray head ring cap 701, an injection channel 702 is arranged at the axis of the spray head ring cap 701, a spray nozzle 703 communicated with the injection channel 702 is arranged on the peripheral side of the spray head ring cap 701, a cross-shaped scraper 704 is fixed on the top of the spray head ring cap 701, a protection knife 705 matched with the spray nozzle 703 is fixed on the peripheral side of the spray head ring cap 701, and a limit ring 706 is arranged inside the spray head ring cap 701.

The side surface of the middle supporting plate 3 is of a boss conical structure, through holes 301 are uniformly distributed on the middle supporting plate 3 in a circumferential mode, the inner surface of the elastic sealing plate 5 is of a conical surface structure matched with the middle supporting plate 3, the elastic sealing plate 5 is attached and sealed through matching, the elastic sealing plate 5 comprises a first fan-shaped sealing plate 501 and a second fan-shaped sealing plate 502 which are attached and complementary through matching, the sum of the central angle alpha of the first fan-shaped sealing plate and the central angle beta of the second fan-shaped sealing plate is 360 degrees, and alpha is more than 90 degrees and less than.

Wherein, the top of the upper raceway 6 is provided with a limit pin 601, and the limit ring 706 is provided with a limit hole 707 matched with the limit pin 604.

Wherein, be provided with the ball between upper raceway 6 and the lower raceway 9, upper raceway 6 bottom and lower raceway 9 top all seted up with ball matched with channel, the ball is annular equidistance setting in the channel between upper raceway 6 and lower raceway 9.

Wherein, the protection knife 705 is a U-shaped structure, and the cross-shaped scraping plate 704 is provided with convex teeth.

Wherein, through bolted connection between spout ring 2 and the clamping ring 4, the outer fringe of elastic seal plate 5 match to press and establish between spout ring 2 and the clamping ring 4.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. Shield constructs excavation and uses dregs modifier injection device, including shower nozzle (1), spout ring (2), set up in the well fagging (3) at spout ring (2) middle part and press elastic sealing plate (5) of establishing on spout ring (2) through clamping ring (4), its characterized in that: an upper rolling way (6) is fixed on the peripheral side surface of the compression ring (4), a nozzle mechanism (7) matched with the upper rolling way (6) is arranged at the top of the upper rolling way (6), a connecting ring (8) is fixed at the bottom of the nozzle mechanism (7) through a screw, and a lower rolling way (9) matched with the upper rolling way (6) is fixed on the connecting ring (8) through a screw; the nozzle mechanism (7) comprises a spray head ring cap (701), an injection channel (702) is arranged at the axis of the spray head ring cap (701), the circumferential side surface of the spray head ring cap (701) is provided with a spray nozzle (703) communicated with the injection channel (702), a cross-shaped scraper (704) is fixed at the top of the spray head ring cap (701), a protective knife (705) matched with the spray nozzle (703) is fixed on the peripheral side surface of the spray head ring cap (701), a limiting ring (706) is arranged in the spray head ring cap (701), the side surface of the middle supporting plate (3) is of a boss conical structure, through holes (301) are uniformly distributed on the circumference of the middle supporting plate (3), the inner surface of the elastic sealing plate (5) is of a conical surface structure which is matched, attached and sealed with the middle supporting plate (3), the elastic sealing plate (5) comprises a first fan-shaped sealing plate (501) and a second fan-shaped sealing plate (502) which are matched, attached and complementary.

2. The muck modifier injection device for shield excavation according to claim 1, wherein a limit pin (601) is arranged at the top of the upper raceway (6), and a limit hole (707) matched with the limit pin (604) is formed in the limit ring (706).

3. The muck modifier injection device for shield excavation according to claim 1, wherein balls are arranged between the upper raceway (6) and the lower raceway (9), channels matched with the balls are formed in the bottom of the upper raceway (6) and the top of the lower raceway (9), and the balls are arranged in the channels between the upper raceway (6) and the lower raceway (9) in an annular and equidistant manner.

4. The muck modifier injection device for shield excavation according to claim 1, wherein the guard knife (705) has a "U" shaped structure, and the cross-shaped scraper (704) is provided with convex teeth.

5. The muck improver injection device for shield excavation according to claim 1, wherein the nozzle ring (2) and the compression ring (4) are connected by bolts.

6. The muck improver injection device for shield excavation according to claim 1, wherein the outer edge of the elastic sealing plate (5) is pressed in a matching manner between the spout ring (2) and the pressing ring (4).