CN218150933U - Prevent gushing device, screw conveyer and shield structure machine - Google Patents

Abstract

The utility model belongs to the technical field of the shield constructs the machine, a prevent spouting device, screw conveyer and shield structure machine is disclosed, one of them prevents spouting the device, is applied to the screw conveyer that the shield constructs the machine, include: the pressure relief pipeline is provided with a first end used for communicating the spiral conveyor and a second end used for discharging sludge; the gate valve is provided with at least one pressure relief pipeline arranged between the first end and the second end; and the cleaning pipeline is communicated with the pressure relief pipeline, is connected to the discharge direction of the gate valve and is used for conveying cleaning liquid to the pressure relief pipeline. The utility model discloses a pressure release pipeline and gate valve can realize the pressure release to the mud sediment in the screw conveyer, just can not take place the condition that gushes behind the pressure release, and the shield constructs the machine and can normally impel to can wash to pressure release pipeline input bentonite solution through wasing the pipeline, can effectively reduce piling up of mud sediment in the pipeline through wasing.

Description

Prevent gushing device, screw conveyer and shield structure machine

Technical Field

The utility model belongs to the technical field of the shield constructs the machine, concretely relates to prevent spouting device, screw conveyer and shield and construct machine.

Background

The structure of slagging tap of current shield structure machine does: the muck truck comprises a screw conveyor, a belt conveyor and a storage battery car, wherein a slag discharge port is formed in the tail part of the screw conveyor, two hydraulic gates are arranged below the slag discharge port at the tail part, the anti-surging capability during construction of a water-rich stratum is extremely poor, when a shield machine tunnels out soil, the gates are opened, muck falls to the belt conveyor below from the slag discharge port, and the muck is conveyed into the muck truck of the storage battery car by the conveyor and is conveyed out of a tunnel. When the shield machine is used for tunneling a water-rich stratum, underground water in the soil bin can slowly permeate to the tail part of the screw conveyor in the period that the screw conveyor does not discharge soil, the pressure at the tail part of the screw conveyor can be gradually increased along with the passage of time, at the moment that a slag discharge port gate of the screw conveyor is opened in next tunneling construction, slag soil and accumulated water in the screw conveyor are sprayed out instantly under the action of water pressure, a large amount of slag soil is accumulated on the belt conveyor instantly, the belt conveyor cannot convey the sprayed slag soil and muddy water away in a short time, the more slag soil and muddy water are accumulated on the belt conveyor, the slag soil and muddy water are sprayed onto electrical equipment on the lower pipe piece and the two side surfaces, at the moment, the drainage of the slag discharge port can only be passively waited, the slag soil accumulated on the belt and the slag soil splashed on the pipe piece need to be manually cleaned, the tunneling construction can be carried out after the reduction of the water pressure is waited, and sewage is conveyed away by a sewage pump at the tail end of the shield.

Therefore, the construction conditions have the following defects:

1. the operation controllability is low: the pressure, the drainage and the slag discharge conditions at the tail part of the screw conveyor cannot be controlled, and the screw conveyor can be propelled only after passively waiting for drainage and depressurization;

2. the slag soil and muddy water splashing controllability is low: the speed of slag and water discharge can be adjusted only by adjusting the gate opening of the screw conveyor, and the splashing of the slag soil and muddy water cannot be accurately controlled;

3. long time for cleaning the residue soil and poor environment: after the dregs are accumulated and the muddy water is splashed, the dregs and the muddy water can be removed only in a manual cleaning mode, so that the construction time is wasted; meanwhile, the shield machine has narrow space, so that the construction area is extremely poor in environmental sanitation caused by splashed muddy water, and the cleanness degree of equipment and the civilized construction difficulty are greatly influenced;

4. the equipment failure rate increases: because the space in the shield tunneling machine is narrow, a large number of valve banks, sensors, electric boxes and electrical equipment are distributed on two sides of the screw conveyor, and protective measures are taken, but after muddy water is splashed, the muddy water cannot be prevented from permeating into the equipment, so that the equipment is damaged, and the maintenance cost is increased;

5. the safety performance is reduced: the shutdown accident caused by sudden damage of the running equipment can happen, and the probability of accident potential is greatly increased.

6. The work efficiency is reduced and the cost is increased: the time for cleaning the muck and the time for maintaining the equipment are increased, the work efficiency is reduced, the construction period is prolonged, and the construction cost is increased;

7. the probability of occurrence of gushing of the screw conveyor increases.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent spouting device, screw conveyer and shield structure machine to the problem of the screw conveyer of solution shield structure machine easily takes place to spout the condition.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, a blowout preventer is provided, which is applied to a screw conveyer of a shield tunneling machine, and comprises:

the pressure relief pipeline is provided with a first end used for communicating the spiral conveyor and a second end used for discharging sludge;

the gate valve is provided with at least one pressure relief pipeline arranged between the first end and the second end; and

and the cleaning pipeline is communicated with the pressure relief pipeline, is connected to the discharge direction of the gate valve and is used for conveying cleaning liquid to the pressure relief pipeline.

In a possible implementation, the cleaning fluid is a bentonite solution.

In a possible implementation mode, the input end of the cleaning pipeline is connected with a delivery pump, and is connected with a bentonite system through the delivery pump; the cleaning pipeline is provided with a one-way valve.

In a possible implementation manner, the two gate valves are arranged and spaced from each other, and the pressure relief pipeline between the cleaning pipeline and the two gate valves is communicated.

In a possible implementation manner, the two gate valves are respectively a first gate valve and a second gate valve, and the first gate valve and the second gate valve are both electro-hydraulic knife-type gate valves and are electrically connected with a controller.

In a possible implementation manner, the spiral conveyer further comprises a pressure sensor for detecting the pressure in the spiral conveyer, and the pressure sensor is electrically connected with the controller.

In a possible implementation manner, the controller is a control system in an operation chamber of the shield tunneling machine.

In a possible implementation mode, the pressure relief pipeline is provided with a bent pipe section and a hose section which are sequentially distributed along the slag discharge direction, and the first gate valve and the second gate valve are respectively arranged at two ends of the bent pipe section.

In a second aspect, a screw conveyor is also provided, which comprises a screw conveyor body, wherein the screw conveyor body is provided with a slag inlet and a slag outlet which can be opened and closed respectively at two ends; the screw conveyer body is provided with the slag discharge port, and one end of the screw conveyer body is communicated with the first end of the pressure relief pipeline of the anti-surging device in any one technical scheme.

In a third aspect, a shield tunneling machine is further provided, including:

the spiral conveyer is provided with a slag inlet and a slag outlet which can be opened and closed which are respectively positioned at two ends;

the belt conveyor is provided with a receiving end, and the receiving end is positioned below the slag discharge port of the spiral conveyor; and

a blowout preventer according to any of the above aspects; and the first end of a pressure relief pipeline of the anti-gushing device is communicated with one end of the screw conveyor, which is provided with a slag discharge port.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a prevent spouting device through pressure release pipeline and gate valve, can realize the pressure release to the mud sediment in the screw conveyer, just can not take place to spout the condition of gushing after the pressure release, the shield constructs the machine and can normally impel to can wash to pressure release pipeline input bentonite solution through wasing the pipeline, can effectively reduce piling up of mud sediment in the pipeline through wasing.

Moreover, through setting up two gate valves, in case when the condition that certain gate valve can't be closed takes place, can in time close another gate valve, effectively reduced because of the unable gushing situation that closes and lead to of gate valve takes place.

Meanwhile, the pressure sensor can detect the pressure in the screw conveyer in real time, so that the pressure relief and the pressure stop can be facilitated according to pressure parameters, and the screw conveyer is more practical and convenient.

The utility model discloses a screw conveyer through the configuration prevent gushing the device, increases pressure release mouth alright install the device at screw conveyer, to the controllability of preventing gushing when effectively having improved screw conveyer and slagging tap to through the design of double-brake, the effectual security of preventing gushing the device of preventing gushing can also wash the pressure release pipeline in addition, has prevented pipe blockage.

The utility model discloses a shield constructs machine, make full use of shield constructs machine has systematic combination application, like pressure sensor, bentonite system, band conveyer etc. combine the blowout prevention of configuration to gush the device, realized the function of autonomous control in the control chamber, the cost is lower.

Drawings

FIG. 1 is a schematic block diagram of a blowout preventer according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of a screw conveyor according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a slag tapping structure of a shield tunneling machine according to an embodiment of the present application.

In the figure: 1-a shield machine; 11-a blowout preventer; 111-pressure relief line; 1111-a first end; 1112-a second end; 1113-first gate valve; 1114-a second gate valve; 112-cleaning the pipeline; 113-a one-way valve; 114-a delivery pump; 115-a pressure sensor; 12-a screw conveyor; 121-a slag discharge port; 13-a belt conveyor; 14-a muck truck; 15-an operating room; 16-bentonite system.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The embodiment of the application provides a blowout preventer 11 which is applied to a screw conveyer 12 of a shield tunneling machine 1. The anti-gushing device 11 achieves the effect of gushing prevention mainly through pressure relief and is used for being installed on a spiral conveyor 12 of the shield tunneling machine 1.

Referring mainly to fig. 1, a blowout preventer 11 according to an embodiment of the present disclosure may include: a pressure relief line 111 having a first end 1111 for communicating with the screw conveyor 12 and a second end 1112 for discharging sludge; a gate valve having at least one pressure relief line 111 disposed between the first end 1111 and the second end 1112; and a cleaning pipeline 112 communicating with the pressure relief pipeline 111 and connected to a discharge direction of the gate valve, and configured to deliver a cleaning liquid to the pressure relief pipeline 111.

The first end 1111 of the pressure relief pipeline is used for being connected and communicated with the rear end of the screw conveyor 12, the second end 1112 of the pressure relief pipeline is used for discharging sludge, and the sludge is conveyed out of the shield through the belt conveyor 13 of the shield tunneling machine 1. The gate valve is used to control the communication of the pressure release line 111 with the screw conveyor 12, and may be provided in one or more. And the pressure release pipeline is not direct to be connected with screw conveyer 12's row cinder notch 121, but connect pressure release pipeline 111 through seting up a pressure release notch on screw conveyer 12, it can assist the passageway of mud sediment to carry out the pressure release also to set up one alone, and because screw conveyer 12 is higher than the front end at its rear end in the shield, dregs and water are mostly in the detached state, dregs mostly deposit in the lower part, the water floats in upper portion, pressure release pipeline and screw conveyer 12 intercommunication after the gate valve is opened, under the effect of pressure, the water on upper portion is being taken a small amount of dregs and getting into in pressure release pipeline 111, can discharge through pressure release pipeline 111, like this alright discharge the main part for the discharge mode pressure release of water, the pressure release is easier and difficult to block up, and can set up the pressure release pipeline into less pipe diameter, even there is a small amount of muddy water blowout like this, can not cause band conveyer 13 dregs to pile up yet. The cleaning pipeline 112 is used for conveying cleaning liquid to the pressure relief pipeline 111, the cleaning liquid has certain pressure and can flow through the pressure relief pipeline 111 after entering the pressure relief pipeline 111, so that the pressure relief pipeline 111 can be cleaned, and the time for accumulation of pipeline sludge, pipeline blockage and manual pipe passing is effectively reduced.

It should be noted that the cleaning solution may be water or a bentonite solution of the bentonite system 16 of the shield machine 1, or may be other media that can be used for cleaning at present, and is not limited.

Through foretell technical scheme, the pressure release pipeline 111 and the gate valve of setting can realize the pressure release to mud sediment in the screw conveyer 12, just can not take place to spout the condition of gushing after the pressure release, and shield constructs machine 1 and can normally impel to can wash to pressure release pipeline 111 input bentonite solution through wasing pipeline 112, can effectively reduce the piling up of mud sediment in the pipeline through the washing.

In one embodiment, the cleaning solution is a bentonite solution.

The bentonite solution can change the workability of soil, can improve the fluidity of the residue soil, is more suitable to be used as a cleaning solution and is more effective to clean.

Further, in order to fully utilize the self condition of the shield and the one-way delivery of the bentonite solution, the input end of the cleaning pipeline 112 is connected with a delivery pump 114, and is connected with a bentonite system 16 through the delivery pump 114; the purge line 112 is provided with a check valve 113.

The bentonite solution can be generated through the own bentonite system 16 of the shield machine 1, the cost can be reduced by utilizing the bentonite system 16, and the self condition of the shield machine is fully utilized. The delivery pump 114 can be connected with a control system in the operation chamber of the shield tunneling machine 1 to form a unified control. The provision of the one-way valve 113 prevents reverse entry of the sewage into the bentonite system 16.

Consider that after the mud passed through the gate valve, the gate valve probably broke down and can't be closed and cause the phenomenon that intraductal small amount gushed, piled up silt and rivers, consequently in the embodiment of this application, the gate valve can be equipped with two and mutual interval, wash between pipeline 112 and two gate valves pressure release pipeline 111 communicates.

So, in case when taking place the unable circumstances of closing of certain gate valve, can in time close another gate valve, effectively reduced because of the unable gushing emergence of closing the result of gate valve.

Further, two the gate valve is first gate valve 1113 and second gate valve 1114 respectively, and first gate valve 1113 and second gate valve 1114 are the electricity liquid and move sword type gate valve and with a controller electric connection.

The electric hydraulic knife gate valve, also called electric hydraulic knife gate valve, is suitable for the pipeline with suspended particles, fibrous material pulp, sewage, coal slurry, ash cement mixture and other medium, and cutting off these medium by the blade-shaped gate plate capable of cutting fibrous material. By adopting the electro-hydraulic moving-blade type gate valve, the circulation can be effectively cut off when the gate valve is closed, and the controller is used for controlling the two electro-hydraulic moving-blade type gate valves. The first gate valve 1113 and the second gate valve 1114 are only for convenience of illustration, and are not limited in practical implementation. As shown in fig. 1, the first gate valve 1113 is located before the second gate valve 1114.

In order to fully utilize the bentonite system 16 of the shield tunneling machine 1, the controller is further a control system in the operation room 15 of the shield tunneling machine 1.

In the specific implementation process of the pressure relief pipeline 111, the pressure relief pipeline 111 has a bend section and a hose section which are sequentially distributed along the slag discharge direction, and the first gate valve 1113 and the second gate valve 1114 are respectively arranged at two ends of the bend section. The pipe section ends can serve as a guide and spray the sludge sprayed out through the longer pipe sections onto the belt conveyor 13.

Specifically, the pressure relief pipeline 111 is formed by connecting an iron 90-degree elbow of DN200 iron pipe, DN200 flange disc, DN200 electric hydraulic knife type gate valve, DN200 iron pipe, hoop and DN200 hose, wherein 1 DN50 pair of threads are welded at the corner of the iron 90-degree elbow, the DN50 pair of threads are connected with a DN50 one-way valve 113, and the other end of the DN50 one-way valve 113 is connected with a bentonite system 16. The pressure relief vent may be replaced by a sight glass finish of the screw conveyor 12.

The blowout preventer 11 of the embodiment of the present application further has the following advantages:

1. the method is suitable for preventing and controlling the gushing of the earth pressure balance shield machine 1 in the fully, strongly and moderately induced hydration water-rich shale stratum, and plays a certain guiding role in preventing and controlling the gushing of the earth pressure balance shield machine 1 in the water-rich stratum during tunneling by the screw machine;

2. the possibility of occurrence of a gushing accident of the screw machine is reduced;

3. the occurrence of slag soil accumulation and muddy water sputtering caused by the spewing of the screw machine is avoided, so that the time for manually cleaning the slag soil and overhauling equipment is greatly reduced;

4. the possibility of accidents caused by mechanical failure due to muddy water sputtering is reduced;

5. the tunneling construction process of the shield tunneling machine 1 is more smoothly connected, and a large amount of time is saved, so that the construction period is shortened, the loss of various manual, mechanical, material and management costs is reduced, and a large amount of loss is reduced for enterprises.

As shown in fig. 2, the embodiment of the present application further provides a screw conveyor 12, which includes a screw conveyor 12 body, where the screw conveyor 12 body has a slag inlet and an openable slag outlet 121 at two ends; the spiral conveyor 12 body is communicated with the first end 1111 of the pressure relief pipeline 111 of the anti-gushing device 11 according to any one of the above technical solutions at the end provided with the slag discharge port 121.

Through the configuration prevent gushing device 11, increase the pressure release mouth at screw conveyer 12 and alright install the device, effectively improved the control ability to preventing gushing when screw conveyer 12 slags tap to through the design of double-brake, the effectual security of preventing gushing device 11 of having guaranteed can also wash pressure release pipeline 111 in addition, prevented the pipe blockage.

As shown in fig. 3, an embodiment of the present application also provides a shield tunneling machine 1, which may include: a screw conveyor 12 having a slag inlet and an openable/closable slag discharge port 121 at both ends thereof; the belt conveyor 13 is provided with a receiving end, and the receiving end is positioned below the slag discharge port 121 of the spiral conveyor 12; and a blowout preventer 11 according to any of the preceding claims; the first end 1111 of the pressure relief pipeline 111 of the anti-gushing device 11 is communicated with the end of the screw conveyor 12 provided with the slag discharge port 121.

The anti-gushing device 11 of the shield machine 1 makes full use of the combined application of the existing systems of the shield machine 1, such as the pressure sensor 115, the bentonite system 16, the belt conveyor 13 and the like, and is combined with the anti-gushing device 11, so that the function of unified control in the operation room 15 is realized, and the cost is lower.

The working principle of the shield tunneling machine 1 of the embodiment of the application is as follows:

before the screw conveyor 12 is ready to be driven and started to discharge soil, the indication number of the pressure sensor 115 at the tail part of the screw conveyor 12 on the screen of the operation room 15 is firstly observed, when the pressure display is larger than 0.5MPa, the pressure display indicates that the pressure at the tail part of the screw conveyor 12 is overlarge, at the moment, the belt conveyor 13 is started, the first gate valve 1113 and the second gate valve 1114 are opened, because the connecting port of the pressure relief pipeline 111 is positioned at the middle upper part of the screw conveyor, most of muck and water are in a separated state, most of muck is precipitated at the lower part, the water floats at the upper part, at the moment, the pressure relief pipeline 111 is unblocked, under the action of the pressure, a small amount of muck is carried by the water at the upper part to enter the pressure relief pipeline 111 and is discharged onto the belt conveyor 13 through the pressure relief pipeline 111, and because the pipe diameter is small, even if a small amount of muddy water is sprayed out, the muck and the belt conveyor 13 can not cause the accumulation of the belt conveyor 13 to quickly convey the muck and the muddy water into the muck vehicle 14. The muddy water in the screw conveyor 12 is discharged from the pressure relief pipeline 111, and the pressure is gradually reduced. When the pressure sensor 115 shows that the pressure is reduced to be below 0.2MPa, the water discharge amount in the pressure relief pipeline 111 becomes very small, at this time, the first gate valve 1113 is closed, the bentonite conveying pump 114 is opened for cleaning, the bentonite which is stirred in advance enters the elbow part between the second gate valve 1114 and the first gate valve 1113 through the cleaning pipeline 112 of the bentonite system 16, as the check valve 113 is arranged on the pressure relief pipeline 111, sewage cannot reversely enter the bentonite system 16, the bentonite solution cleans the pressure relief pipeline 111, the bentonite system 16 is closed after the cleaning is finished, and then the second gate valve 1114 is closed. At this time, the pressure in the soil bin and the screw conveyor is reduced to a low pressure state, and the screw conveyor 12 is started without a gushing phenomenon, so that the screw conveyor can be normally propelled.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A blowout prevention device applied to a screw conveyor (12) of a shield tunneling machine (1), characterized by comprising:

a pressure relief pipeline (111) having a first end (1111) for communicating with the screw conveyor (12) and a second end (1112) for discharging sludge;

a gate valve having at least one pressure relief line (111) disposed between the first end (1111) and the second end (1112); and

and the cleaning pipeline (112) is communicated with the pressure relief pipeline (111), is connected to the discharge direction of the gate valve, and is used for conveying cleaning liquid to the pressure relief pipeline (111).

2. The blowout preventer of claim 1, wherein the cleaning fluid is a bentonite solution.

3. A blowout preventer according to claim 2, wherein the input of the purge line (112) is connected to a transfer pump (114) and via the transfer pump (114) is connected to a bentonite system (16); the cleaning pipeline (112) is provided with a one-way valve (113).

4. A blowout preventer according to any one of claims 1-3, wherein the gate valves are provided in two and spaced apart relationship, and the flushing line (112) communicates with the pressure relief line (111) between the two gate valves.

5. A blowout preventer according to claim 4, wherein the two gate valves are a first gate valve (1113) and a second gate valve (1114), respectively, and the first gate valve (1113) and the second gate valve (1114) are both electro-hydraulic knife-type gate valves and are electrically connected to a controller.

6. A blowout preventer according to claim 5, further comprising a pressure sensor (115) for detecting pressure within the screw conveyor (12), the pressure sensor (115) being electrically connected to the controller.

7. A blowout preventer according to claim 6, wherein the controller is a control system in the operator's room (15) of the shield tunneling machine (1).

8. A blowout preventer according to claim 7, wherein the pressure relief pipeline (111) has a bent pipe section and a flexible pipe section which are sequentially arranged in a slag discharge direction thereof, and the first gate valve (1113) and the second gate valve (1114) are respectively provided at both ends of the bent pipe section.

9. The screw conveyor is characterized by comprising a screw conveyor (12) body, wherein the screw conveyor (12) body is provided with a slag inlet and a slag outlet (121) which can be opened and closed respectively at two ends; the screw conveyor (12) body communicates at the end provided with the slag discharge opening (121) with a first end (1111) of a pressure relief line (111) of a blowout preventer according to any of claims 1-8.

10. A shield tunneling machine, comprising:

a screw conveyor (12) which is provided with a slag inlet and a slag outlet (121) which can be opened and closed and are respectively positioned at two ends;

the belt conveyor (13) is provided with a receiving end, and the receiving end is positioned below the slag discharge port (121) of the spiral conveyor (12); and

a blowout preventer according to any one of claims 1 to 8; the first end (1111) of a pressure relief pipeline (111) of the anti-gushing device is communicated with one end of the spiral conveyer (12) provided with a slag discharge port (121).

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