Spiral muck discharging device

Abstract

The invention discloses a spiral muck discharging device, and belongs to the technical field of soil layer tunneling. Comprising a spiral blade and a cylinder sleeved outside the spiral blade, a slag discharging channel is formed in a gap between the cylinder and the spiral blade, the pressure conveying device is provided with a deformation cavity and arranged on the surface of the spiral blade, the pressure conveying device comprises a rotor and a stator, and the rotor is arranged at the tail end of the spiral blade. A central shaft forming the spiral blade rotates along with the spiral blade, the stator, the rotor and the spiral blade are sequentially connected, and a pressure conveying channel is formed in the stator, the rotor and the spiral blade to pressurize the filling piece and seal the slag discharging channel. And the pressure source is connected with the stator. By means of the device, pressure can be continuously injected into the filling piece through the pressure source, the slag discharging channel is closed, the purpose of blocking water gushing is achieved, the problem of muck gushing of the earth pressure balance shield tunneling machine in water-rich stratum construction can be effectively solved, it can be guaranteed that the pressure of an earth bin is stable, and then the tunneling safety of equipment is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to a spiral type muck discharging device, belonging to the technical field of soil layer tunneling. BACKGROUND

[0002] The earth pressure balance shield machine is a construction equipment for underground soil layer tunneling, which tunnels the soil layer layer by layer through the cutter head, and stores the muck generated by excavation in the soil bin behind the cutter head, cooperates with the shaft type or belt type screw conveyor, takes the muck from the bottom of the soil bin, and transports it to the belt conveyor.

[0003] In the current existing construction scheme, the muck improvement construction needs to consume a lot of manpower and material resources, and the improvement effect cannot be well guaranteed. When the earth pressure balance shield machine passes through the water-rich stratum, if the muck improvement effect is not good, it will lead to the decrease of water stopping property, and then lead to the out-of-control of muck discharge, so that a large amount of mud and muck spurt out from the discharge port of the screw conveyor.

[0004] Therefore, for the soil layer construction in the water-rich stratum, it is an urgent need in the field to design a conveying device that can stably control the muck discharge. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a spiral type muck discharging device, which solves the problem of easy out-of-control of muck discharge in the existing technology when excavating in the water-rich stratum.

[0006] The technical problem to be solved by the present application is solved by the following technical scheme: a spiral type muck discharging device, comprising a spiral blade and a cylinder body sleeved outside the spiral blade, the gap between the cylinder body and the spiral blade forms a muck discharge channel, further comprising: a filling member having a deformation cavity, arranged on the surface of the spiral blade; a pressure conveying device comprising a rotor and a stator, the rotor is arranged at the end of the spiral blade, the central shaft constituting the spiral blade rotates with the spiral blade, the stator, the rotor and the spiral blade are sequentially connected and internally have a pressure conveying channel to fill the filling member with pressure, and the muck discharge channel is closed; a pressure source connected to the stator.

[0007] By adopting the above technical scheme, the pressure source can continuously inject pressure into the filling member to close the muck discharge channel, achieving the purpose of completely blocking the gushing water. Not only can it effectively deal with the problem of muck spurt in the construction of the earth pressure balance shield machine in the water-rich stratum, polluting the internal construction environment, but also can ensure the stability of the soil bin pressure, and further ensure the safety of the equipment tunneling.

[0008] The application is further provided with: the surface of the spiral blade facing the slag bin is a slag-facing surface, the surface away from the slag bin is a slag-back surface, and the slag-facing surface, the slag-back surface and the inner side of the spiral blade between the slag-facing surface and the slag-back surface are provided with a plurality of filling pieces.

[0009] By adopting the above technical scheme, the three filling pieces are used to punch and expand in three directions at the same cross-section position of the cylinder, thereby improving the sealing effect and greatly improving the sealing property of the slag discharge channel.

[0010] The application is further provided with: the spiral blade is provided with filling pieces on at least two pitches, and the filling pieces are equidistantly arranged along the axial direction.

[0011] By adopting the above technical scheme, the filling pieces are arranged at multiple points of the cylinder, and the sealing effect of the slag discharge channel can be further improved to form multiple sealing ports.

[0012] The application is further provided with: the pressure conveying channel in the spiral blade is spiral-shaped, and the spiral line is parallel to the inner and outer sides of the spiral blade, and the pressure conveying channel communicates the inner cavity of the filling piece with the pressure source.

[0013] By adopting the above technical scheme, the pressure conveying channel can convey pressure to the entire spiral blade, so that the spiral blade can be provided with different numbers of filling pieces at different positions according to specific working conditions, and the adjustability of the device is improved.

[0014] The application is further provided with: the spiral blade is provided with a pressing piece, the filling piece is fixed to the spiral blade through the pressing piece, and a closed pressure cavity is formed after punching.

[0015] By adopting the above technical scheme, the filling piece can be quickly fixed to the spiral blade, the installation efficiency is improved, and the filling piece can be quickly replaced when damaged later.

[0016] The application is further provided with: the pressing piece is embedded in the spiral blade and fixed to the spiral blade through bolts, and the filling piece and the pressing piece are hook-shaped and interact with each other.

[0017] By adopting the above technical scheme, the filling piece can be tightly attached to the pressing piece after punching and expanding through the hook-shaped structure, and the connection strength of the two is improved.

[0018] The application is further provided with: the rotor is provided with an optical axis section, the spiral blade is disconnected at the optical axis section, and the cylinder is disconnected at the optical axis section and connected with a middle section cylinder.

[0019] By adopting the technical scheme, a buffer cavity is formed in the optical axis section area, and the muck transmitted by the spiral blade can be buffered at the buffer cavity, and when the muck in the buffer cavity encounters water-rich soil layer, the muck in the buffer cavity can hinder the gushing water and soil, and provide reaction time for subsequent construction personnel to close the muck discharge channel through the filling piece.

[0020] The application is further provided that the optical axis section is provided with a filling piece, and the filling piece on the optical axis section is arranged on the inner wall of the middle section cylinder.

[0021] By adopting the technical scheme, the sealing effect of the muck discharge channel is further improved, and the filling piece at the position can adjust the aperture of the muck discharge channel at the position of the optical axis section, and adjust the muck discharge speed.

[0022] The application is further provided that the cylinder body adopts a half-structure or a whole-structure.

[0023] By adopting the technical scheme, the half-structure is convenient for installation, and the whole-structure has better sealing effect.

[0024] The application is further provided that the filling piece is a rubber bag or an air bag.

[0025] By adopting the technical scheme, the filling piece can be quickly inflated after being punched, and is tough and durable.

[0026] The application has the following beneficial effects: By installing multiple filling pieces on the spiral blade, when the spiral blade encounters water-rich soil layer, the filling pieces can be quickly inflated by the pressure source, so as to close the muck discharge channel and prevent a large amount of mud from gushing, and achieve the purpose of blocking the gushing water. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic diagram of the muck discharge process of the application; Figure 2 It is a structure schematic diagram of the spiral blade and the filling piece in the first embodiment of the application; Figure 3 It is a structure schematic diagram of the filling piece installation in the first embodiment of the application; Figure 4 It is a sectional view of the spiral blade in the first embodiment of the application; Figure 5 It is a structure schematic diagram of the muck discharge process in the second embodiment of the application; Figure 6 It is a structure schematic diagram of the optical axis section and the middle section cylinder in the second embodiment of the application; Figure 7 It is a structure schematic diagram of the third embodiment of the application.

[0028] Fig. 1, helical blade; 110, face of the slag; 120, back of the slag; 2, barrel; 2a, front blade segment; 2b, rear blade segment; 3, slag discharge channel; 4, filling piece; 4a, filling piece one; 4b, filling piece one; 5, rotor; 6, stator; 7, pressure conveying channel; 710, first pressure conveying channel; 720, second pressure conveying channel; 730, third pressure conveying channel; 8, compaction piece; 9, middle section barrel; 10, optical axis segment; 11, bulkhead; 12, shield; 13, slag; 14, injection hole. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in combination with specific drawings.

[0030] Example one: As shown in Figure 1 and Figure 2 , a helical slag 13 discharge device, comprising a helical blade 1 and a barrel 2 sleeved outside the helical blade 1, the gap between the barrel 2 and the helical blade 1 forms a slag discharge channel 3, further comprising a filling piece 4 with a deformation cavity, provided on the surface of the helical blade 1.

[0031] A pressure conveying device, comprising a rotor 5 and a stator 6, the rotor 5 is provided at the end of the helical blade 1, the central shaft of the helical blade 1 rotates with the helical blade 1, the stator 6, the rotor 5 and the helical blade 1 are connected in sequence and internally open a pressure conveying channel 7 to charge the filling piece 4 with pressure, and close the slag discharge channel 3.

[0032] A pressure source connected to the stator 6.

[0033] During the construction process of the device discharging slag, one end of the barrel 2 is connected to the bottom of the soil bin, one end of the helical blade 1 extends outward from the opening of the barrel 2 and is inserted into the soil bin, the helical blade 1 is driven to rotate by the rotor 5 to bring the slag 13 out of the soil bin, and the slag 13 is discharged through the slag discharge channel 3.

[0034] Among them, the slag 13 discharge device in the present application is mainly applied to the slag discharge system of the earth pressure balance shield machine, and the system further comprises a bulkhead 11 and a shield 12. During excavation, the face of the soil body and the bulkhead 11 form a closed soil bin, which can balance the pressure of the front soil body and play a role in stabilizing the stratum.

[0035] As shown in Figure 2 and Figure 3As shown, the side of the spiral blade 1 facing the soil chamber is the slag-facing side 110, and the side facing away from the soil chamber is the slag-receiving side 120. A plurality of filling elements 4 are provided on the inner side of the spiral blade 1 between the slag-facing side 110 and the slag-receiving side 120. The filling elements 4 are arranged at least at two pitches on the spiral blade 1, and the filling elements 4 are equidistant along the axial direction.

[0036] Furthermore, the pressure delivery channel 7 inside the spiral blade 1 is spiral-shaped and the spiral line is parallel to the inner and outer sides of the spiral blade 1. The pressure delivery channel 7 connects the inner cavity of the filling member 4 with the pressure source.

[0037] In this embodiment, the helical blade 1 includes two sections: a hollow section near the soil chamber and a drive section away from the soil chamber. The center of the hollow section of the helical blade 1 is hollow, and the center of the drive section of the helical blade 1 is connected to the rotor 5, that is, the rotor 5 is fixed on the drive section of the helical blade 1.

[0038] By driving the rotor 5 to rotate, one end of the rotor 5 is fixed to the stator 6, such as Figure 2 As shown, a pressure conveying channel 7 is provided inside the stator 6, and a pressure conveying channel 7 is provided in the middle of the rotor 5, which is connected to the pressure conveying channel 7 inside the stator 6. The pressure conveying channel 7 on the stator 6 is connected to a pressure source.

[0039] Specifically, the filling component 4 is filled with gas or liquid and expanded by a pressure conveying device. The rotor 5 is located at the end of the spiral blade 1, near the slag outlet. The rotor 5 forms the central axis of the spiral blade 1 and rotates with the spiral blade 1. The stator 6 is stationary and located outside the rotor 5. The stator 6 and the rotor 5 have a first pressure conveying channel 710 and a second pressure conveying channel 720 respectively. The spiral blade 1 has a third pressure conveying channel 730. The stator 6 also has air holes. The air holes, the first pressure conveying channel 710, the second pressure conveying channel 720 and the third pressure conveying channel 730 are connected in sequence. The pressure source is connected to the air holes on the stator 6 to fill the filling component 4 with gas or liquid and make it expand.

[0040] like Figure 3 and Figure 4 As shown, a clamping member 8 is provided on the spiral blade 1, and the filling member 4 is fixed to the spiral blade 1 by the clamping member 8, forming a sealed pressure chamber after stamping. The clamping member 8 is embedded in the spiral blade 1 and fixed to the spiral blade 1 by bolts, and the filling member 4 and the clamping member 8 interact in a hook shape.

[0041] In the embodiment, the filling member 4 is a plastic bag, and a clamping portion is connected to the opening periphery of the filling member 4 and clamped with the pressing member 8. The filling member 4 is clamped with the pressing member 8 through the clamping portion, and is fixed to the spiral blade 1 and communicated with the third pressure conveying passage 730 in the spiral blade 1. In the embodiment, the pressing member 8 is a pressing block, which is embedded in the spiral blade 1 and fixed to the spiral blade 1 by bolts. The filling member 4 is tightly attached to the spiral blade 1 under the action of the pressing block, and will not be separated from the pressing member 8 under the internal pressure. In order to further press the filling member 4, the filling member 4 and the pressing member 8 are clamped with each other in a hook shape.

[0042] In the embodiment, the filling member 4 can also be an air bag, and the fixing mode can also be adhesion or sleeving on the spiral blade 1.

[0043] Embodiment two: As shown in Figure 5 The entire spiral blade 1 is arranged as a driving section, the rotor 5 is connected to the entire spiral blade 1, and the optical shaft section 10 is arranged on the rotor 5. The spiral blade 1 is disconnected at the optical shaft section 10, the barrel 2 is disconnected at the optical shaft section 10 and connected to the middle section barrel 9.

[0044] The barrel 2 and the middle section barrel 9 can be in a half structure or a whole structure. The half structure can make the installation process more convenient, and the whole structure can ensure better sealing effect.

[0045] Further, the filling member 4 is arranged on the optical shaft section 10 and attached to the inner wall of the middle section barrel 9.

[0046] The optical shaft section 10 divides the entire rotor 5 into a front blade section 2a close to the soil bin and a rear blade section 2b away from the soil bin. The optical shaft section 10 is located between the front blade section 2a and the rear blade section 2b, and the optical shaft section 10 is not provided with the spiral blade 1. During the discharge of the muck 13, the rotor 5 rotates to drive the spiral blade 1 to rotate, the muck 13 in the soil bin enters the front blade section 2a, and is moved to the rear under the pushing of the spiral blade 1. Since the optical shaft section 10 is not provided with the spiral blade 1, the muck 13 is accumulated on the optical shaft section 10 and forms a soil plug.

[0047] It should be noted that the original state of the muck 13 cut by the cutter head is improved to form a flowable muck 13, and in the absence of the active conveying of the spiral blades 1 in the optical axis section 10, a large amount of muck 13 will accumulate here, and finally form a soil plug effect, which can play a certain role in blocking the water inrush. The muck 13 still has flowability here, and during the continuous tunneling operation of the earth pressure balance shield machine, the spiral blades 1 continuously take out the muck 13 from the soil chamber, so that the muck 13 continuously accumulates in front of the optical axis section 10, and after a certain amount of accumulation, the pressure of the muck 13 in front of the optical axis section 10 will extrude the muck 13 in the rear of the optical axis section 10 into the next section of the spiral blade 1, and after the muck 13 enters the rear blade section 2b, it can be driven by the spiral blade 1 to move forward again and be conveyed to the muck discharge port.

[0048] In this embodiment, the optical axis section 10 can be provided with one or more according to different construction conditions, so as to achieve the purpose of multiple water inrush blocking.

[0049] Further, the optical axis section 10 can be a constant diameter shaft or a stepped shaft. The constant diameter shaft has a very top diameter, so that the large particle size soil can pass quickly, preventing the soil pressure at the position of the optical axis section 10 from being too large due to blocking. The stepped shaft can be suitable for soil layers with small particle size soil, and can appropriately increase the soil pressure of the optical axis section 10, so that the muck 13 of the optical axis section 10 is not too loose.

[0050] The cylinder 2 has a top-down half structure and is connected by a half flange. A pressure source is used to continuously inject gas or liquid into the filling member 4. After being pressurized, the filling member 4 continuously expands, the space through which the muck discharge channel 3 can pass continuously decreases, until the filling member 4 and the rotor 5 of the optical axis section 10 are tightly fitted, so as to completely close the muck discharge channel 3, and achieve the purpose of completely blocking the water inrush.

[0051] In this embodiment, the pressure in the filling member 4 can be adjusted. When the soil plug pressure value is greater than the pressure value of the filling member 4, the muck discharge channel 3 is opened to discharge the muck, and the soil chamber pressure is dynamically adjusted.

[0052] In other embodiments, an injection hole 14 is provided on the filling member 4 for supplying pressure. The injection hole 14 is fixed on the inner wall of the middle section cylinder 9. The edge of the injection hole 14 of the filling member 4 is turned outward to the outside of the middle section cylinder 9 and is fixed on the middle section cylinder 9 by bolts. The inside of the middle section cylinder 9 is provided with at least two filling members 4.

[0053] Embodiment three: This embodiment is based on embodiment two, and the difference lies in that the filling member 4 and the middle section cylinder 9 both adopt a half structure, as shown in Figure 7 The filling member 4 is respectively a filling member one 4a and a filling member two 4b. The upper and lower connecting parts of the filling member one 4a and the filling member two 4b are pressed on the connecting surface of the two middle section cylinders 9.

[0054] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and such changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A spiral type slag discharge device comprising a spiral blade (1) and a cylinder (2) sleeved outside the spiral blade (1), a gap between the cylinder (2) and the spiral blade (1) forming a slag discharge channel (3), characterized in that, Also include: The filling member (4) has a deformation cavity, which is arranged on the surface of the spiral blade (1); The pressure conveying device includes a rotor (5) and a stator (6), the rotor (5) is arranged at the end of the spiral blade (1), the central axis of the spiral blade (1) rotates with the spiral blade (1), the stator (6), the rotor (5) and the spiral blade (1) are sequentially connected and internally provided with a pressure conveying channel (7) to charge the filling member (4) with pressure, and the discharge channel (3) is closed; The pressure source is connected to the stator (6).

2. A screw-type sludge discharge apparatus according to claim 1, characterized in that: The surface of the spiral blade (1) facing the soil bin is the slag-facing surface (110), the surface away from the soil bin is the slag-backing surface (120), and a plurality of filling members (4) are arranged on the inner side of the spiral blade (1) between the slag-facing surface (110) and the slag-backing surface (120).

3. A screw type sludge discharge apparatus according to claim 2, wherein: The spiral blade (1) is arranged with filling members (4) on at least two pitches, and the filling members (4) are equidistantly arranged along the axial direction.

4. A screw-type sludge discharge apparatus according to claim 1, characterized by: The pressure conveying channel (7) in the spiral blade (1) is spiral-shaped, and the spiral line is parallel to the inner and outer sides of the spiral blade (1), and the pressure conveying channel (7) communicates the inner cavity of the filling member (4) with the pressure source.

5. A screw type sludge discharge apparatus according to claim 3, wherein: The spiral blade (1) is provided with a pressing member (8), and the filling member (4) is fixed on the spiral blade (1) through the pressing member (8), and a closed pressure cavity is formed after stamping.

6. A screw type sludge discharge apparatus according to claim 5, wherein: The pressing member (8) is embedded in the spiral blade (1) and fixed on the spiral blade (1) by bolts, and the filling member (4) and the pressing member (8) are hook-shaped and interact with each other.

7. A screw type sludge discharge apparatus according to claim 1, wherein: The rotor (5) is provided with an optical axis section (10), the spiral blade (1) is disconnected at the optical axis section (10), the barrel (2) is disconnected at the optical axis section (10) and connected with a middle section barrel (9).

8. A screw type sludge discharge apparatus according to claim 7, wherein: The optical axis section (10) is provided with a filling member (4), and the filling member (4) on the optical axis section (10) is arranged on the inner wall of the middle section barrel (9).

9. A screw type sludge discharge apparatus according to claim 1, wherein: The barrel (2) adopts a half-part structure or an integral structure.

10. A screw type sludge discharge apparatus according to claim 1, wherein: The filling member (4) is a rubber bag or an air bag.

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