Screw conveyor rear unearthed jaw crushing quarrying system

Abstract

The utility model discloses a screw conveyor rear unearthing jaw crushing quarrying system which comprises two sets of screw conveyors, and the two sets of screw conveyors are respectively matched with a driving device; cylinder bodies of the two sets of screw conveyors are connected front and back, a quarrying box communicated with the rear set of screw conveyor is arranged below the rear portion of the rear set of screw conveyor, a jaw crusher is arranged in the quarrying box, and a slurry discharging pipe is arranged on the rear portion of the quarrying box. According to the screw conveyor rear unearthed jaw type crushing quarrying system, the structural design of a double-screw rear unearthed mode of the screw conveyor is adopted, the quarrying box is arranged towards the rear end, the spare space at the front end of the connecting bridge is fully utilized, and the problem that the quarrying box is stagnated in discharging due to the fact that the volume of the quarrying box is insufficient is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of shield machines for tunnel construction, in particular to a screw machine rear-excavation type jaw crushing and quarrying system. Background Art

[0002] At present, in order to improve the adaptability of shield machines to more geological conditions, shield machines integrating multiple modes have gradually become a trend. Various types of dual-mode shield machines have been used, such as slurry and earth pressure dual-mode shield machines, slurry TBM dual-mode shield machines, earth pressure TBM dual-mode shield machines and variable density dual-mode shield machines.

[0003] Due to space limitations, the screw conveying system of the slurry-water-earth-pressure dual-mode shield machine generally uses the lower end of the screw machine to discharge slag, and the spiral channel of the screw machine is compatible with the slurry discharge pipe function of the slurry circulation. In the slurry mode, the slurry flows into the quarrying box due to gravity, and the crusher crushes the large stones in the slurry and transports them to the ground through the grille. However, due to the limited crushing capacity of the crusher and the limited volume of the quarrying box, stagnation and pressure accumulation often occur in the quarrying box. The impact of this pressure causes fluctuations in the pressure of the slurry balance, which brings safety hazards to the pressure maintenance of the face, and requires the machine to be stopped for manual cleaning of blocked stones, which seriously affects the construction efficiency of the shield machine.

[0004] like Figure 4 As shown in the figure, the space at the wireframe A is narrow, and it is difficult to set a large quarrying box here. In order to prevent the quarrying box from being blocked, the flow rate of the muddy water circulation needs to be increased, and the volume of the quarrying box must be increased. Under the large flow rate of muddy water circulation, the slurry's slag carrying capacity can be improved, which can effectively solve the problem of stagnation. However, since the shield machine of this model is limited by the space for slag discharge at the lower end of the screw machine, the volume of the quarrying box cannot be increased. Utility Model Content

[0005] The purpose of the utility model is to provide a screw machine rear-excavation type jaw crushing quarrying system, which adopts the structural design of the double-helix rear-excavation mode of the screw machine, arranges the quarrying box to the rear end, makes full use of the free space at the front end of the connecting bridge, and effectively solves the problem of stagnation of the quarrying box due to insufficient volume of the quarrying box.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is to design a screw machine rear-excavation type jaw crushing and quarrying system, including two sets of screw machines, and the two sets of screw machines are respectively equipped with driving devices; the cylinders of the two sets of screw machines are connected front to back, and a quarrying box connected to the rear of the rear set of screw machines is provided below, a jaw crusher is arranged in the quarrying box, and a slurry discharge pipe is provided at the rear of the quarrying box.

[0007] Furthermore, the driving device includes a hydraulic motor, a gear ring inner cylinder and spiral blades; the spiral blades are fixed to the inner wall of the gear ring inner cylinder, the gear ring inner cylinder is located inside the cylinder of the screw machine, the hydraulic motor is located outside the cylinder of the screw machine, and the teeth of the gear ring inner cylinder extend out of the cylinder of the screw machine and engage with the transmission end of the hydraulic motor.

[0008] Since the inner cylinder of the gear ring rotates axially relative to the screw machine barrel, the screw machine barrel is disconnected at the position where the teeth of the inner cylinder of the gear ring extend out of the screw machine barrel. Figure 2 As shown, there is a housing that encloses the transmission end of the hydraulic motor and the teeth of the gear ring inner cylinder to combine the disconnected screw machine cylinder, and the movement of the transmission end of the hydraulic motor and the teeth of the gear ring inner cylinder all occurs inside the housing.

[0009] Furthermore, wear-resistant steel plates are provided on the front and rear end surfaces of the inner cylinder of the gear ring. A lip seal is provided on the cylinder of the screw machine near the wear-resistant steel plate. Lubricating grease is injected into the lip seal to lubricate and seal the gap between the wear-resistant steel plate and the cylinder of the screw machine.

[0010] Furthermore, the spiral blade is connected to the rotary blade of the screw machine through a pin shaft.

[0011] Furthermore, a hydraulic gate which can be opened and closed is provided between the two sets of screw machines.

[0012] Furthermore, a chain pressure relief valve is provided at the tail of the rear set of screw machines.

[0013] Furthermore, a pressurized flushing pipeline is provided at the bottom of the front end of the quarrying box, and a grille is provided in front of the slurry discharge pipe at the rear of the quarrying box. The grille is used to block large particles that have not been crushed by the jaw crusher or large particles that have been crushed by the jaw crusher but are still large in size.

[0014] Furthermore, the jaw crusher includes a fixed plate, an oil cylinder and a toothed jaw plate; the fixed plate is fixed on the quarrying box; there are two oil cylinders and two toothed jaw plates, one end of the two oil cylinders is hinged on both sides of the fixed plate, and the other ends of the two oil cylinders are hinged to the two toothed jaw plates; the fixed plate is hinged to the two toothed jaw plates at the center of the fixed plate, and the tooth surfaces of the two toothed jaw plates are opposite to each other.

[0015] The advantages and beneficial effects of the utility model are as follows: the utility model proposes a double-screw conveying mode (i.e., the front screw machine feeds the material, and the rear screw machine relays the transportation) for a jaw crushing and quarrying system with a screw machine after excavation. The excavation form under the screw machine is changed to the excavation form after excavation, and the screw drive module is changed accordingly (i.e., a separate drive device is provided on the front screw machine and the rear screw machine). The excavation form of the screw machine after excavation can move the quarrying box to a larger area for expansion design, which effectively solves the problem that the quarrying box has a small volume and a weak mud slag carrying capacity, especially in strata with too many large pebbles and boulders, the crusher has no time to crush them, and the slag is accumulated in a very small quarrying box, resulting in stagnation. The combination of the screw machine in the after-excavation mode and the slag discharge concept of the jaw crushing quarrying box effectively improves the dual-mode shield machine in the mud-water mode, especially in strata with more large pebbles and boulders. By increasing the volume of the quarrying box, the accumulation of stones at the crusher is effectively avoided. The system greatly reduces slag accumulation and the frequency of slag cleaning, reduces the safety risks and downtime costs caused by shutdown for slag cleaning, and improves the overall shield construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 A schematic diagram of the drive device.

[0018] Figure 3 Schematic diagram of jaw crusher.

[0019] Figure 4 It is a schematic diagram of a mud-water earth pressure dual-mode shield machine in the prior art.

[0020] Among them, the front screw machine 1, the front drive device 2, the hydraulic gate 3, the rear screw machine 4, the rear drive device 5, the interlocking pressure relief valve 6, the pressurized flushing pipeline 7, the jaw crusher 8, the grid delete 9, the hydraulic motor 11, the gear ring inner cylinder 12, the wear-resistant steel plate 13, the lip seal 14, the spiral blade 15, the pin shaft 16, the maintenance manhole 17, the toothed jaw plate 18, the quarrying box 19, and the oil cylinder 20. DETAILED DESCRIPTION

[0021] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example

[0022] like Figure 1 , Figure 2 and Figure 3As shown, a screw machine rear-excavation type jaw crushing and quarrying system includes a front screw machine 1, a front drive device 2, a hydraulic gate 3, a rear screw machine 4, a rear drive device 5, an interlocking pressure relief valve 6, a pressurized flushing pipeline 7, a jaw crusher 8, and a grid delete 9.

[0023] The rear end of the front screw machine 1 is connected to the front end of the rear screw machine 4, and a hydraulic gate 3 that can be opened and closed is arranged between the two; a front drive device 2 and a rear drive device 5 are respectively arranged on the front screw machine 1 and the rear screw machine 4; the front drive device 2 and the rear drive device 5 have the same structure, and are both composed of a hydraulic motor 11, a gear ring inner cylinder 12, a wear-resistant steel plate 13, a lip seal 14, a spiral blade 15, and a pin 16; the spiral blade 15 is welded and assembled on the inner wall of the gear ring inner cylinder 12, and the rotating shaft of the spiral blade 15 is connected to the rotating blade in the screw machine (including the front screw machine 1 and the rear screw machine 4) through the pin 16, the gear ring inner cylinder 12 is located inside the cylinder of the screw machine (including the front screw machine 1 and the rear screw machine 4), the hydraulic motor 11 is arranged outside the cylinder of the screw machine, and the teeth of the gear ring inner cylinder 12 are meshed with the transmission end of the hydraulic motor 11, and the gear ring inner cylinder 12 is driven by the transmission end of the hydraulic motor 11 to rotate inside the cylinder of the screw machine.

[0024] A wear-resistant steel plate 13 is fixed to the front and rear end surfaces of the gear ring inner cylinder 12 by bolts; a lip seal 14 is arranged on the cylinder of the screw machine near the wear-resistant steel plate 13, and lubricating grease is injected into the lip seal 14 to lubricate and seal the gap between the wear-resistant steel plate 13 and the cylinder of the screw machine, ensuring that the debris or mud in the screw machine will not flow out of the screw machine.

[0025] A quarrying box 19 is arranged below the rear part of the rear screw machine 4 , and the rear part of the rear screw machine 4 is communicated with the quarrying box 19 ; a chain pressure relief valve 6 is also arranged at the tail of the rear screw machine 4 .

[0026] A jaw crusher 8 is provided in the quarrying box 19; and the jaw crusher 8 is located at the rear of the quarrying box 19, a pressurized flushing pipeline 7 is provided at the front bottom of the quarrying box 19, a slurry discharge pipe is provided at the rear of the quarrying box 19, and a grille 9 is provided in front of the slurry discharge pipe.

[0027] A maintenance manhole 17 which can be opened and closed is also provided on both sides of the bottom of the quarrying box 19 .

[0028] like Figure 3As shown, the jaw crusher 8 at least includes a fixed plate, an oil cylinder 20 and a toothed jaw plate 18; the fixed plate is fixed on a quarrying box 19; there are two oil cylinders 20 and two toothed jaw plates 18, and the telescopic rods (or cylinder bodies) of the two oil cylinders 20 are respectively hinged on both sides of the fixed plate; the two toothed jaw plates 18 are respectively hinged at the central position of the fixed plate, and the tooth surfaces of the two toothed jaw plates 18 are opposite to each other; the cylinder bodies (or telescopic rods) of the two oil cylinders 20 are respectively hinged with the two toothed jaw plates 18, so that the two toothed jaw plates 18 are driven to perform periodic biting actions through the telescopic action of the telescopic rods of the two oil cylinders 20.

[0029] Working process: the front driving device 2 drives the front screw machine 1, and the mud and slag are transported backward through the front screw machine 1, and the rear driving device 5 drives the rear screw machine 4 to relay the transported mud and slag, and the mud and slag fall into the quarrying box 19, and the jaw crusher 8 crushes the large particles of soil or stones mixed in the mud and slag; then the mud and slag after the crushing operation of the jaw crusher 8 is discharged through the slurry discharge pipe provided with a grille 9, and the discharged mud and slag is then transported to the ground through the traditional mode.

[0030] In the above process, in order to adapt to the working conditions of soft rock formations, a pressurized flushing pipe 7 can be led from the slurry inlet circulation to the bottom of the front end of the quarrying box 19 to pressurize the bottom of the quarrying box 19 to enhance the fluidity of the slurry at the bottom of the quarrying box 19 and prevent sedimentation and stagnation.

[0031] The design of the maintenance manhole 17 and the hydraulic gate 3 is mainly used for the maintenance and cleaning of the quarrying box 19. When necessary, the hydraulic gate 3 can be closed, the maintenance manhole 17 can be opened, and the quarrying box 19 can be entered for maintenance and cleaning.

[0032] When pressure build-up occurs, the interlocking pressure relief valve 6 can be quickly opened to perform a safe pressure relief operation to prevent pressure build-up.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A screw conveyor rear excavation type jaw crushing quarrying system, characterized by: It comprises two sets of screw machines, and each set of screw machines is equipped with a driving device; the cylinders of the two sets of screw machines are connected front to back, a quarrying box connected to the rear set of screw machines is arranged below the rear part, a jaw crusher is arranged in the quarrying box, and a slurry discharge pipe is arranged at the rear of the quarrying box.

2. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 1 is characterized in that: The driving device includes a hydraulic motor, a gear ring inner cylinder and a spiral blade; the spiral blade is fixed to the inner wall of the gear ring inner cylinder, the gear ring inner cylinder is located inside the cylinder of the screw machine, the hydraulic motor is located outside the cylinder of the screw machine, and the teeth of the gear ring inner cylinder extend out of the cylinder of the screw machine and mesh with the transmission end of the hydraulic motor.

3. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 2 is characterized in that: The front and rear end surfaces of the inner cylinder of the gear ring are provided with wear-resistant steel plates. A lip seal is provided on the cylinder of the screw machine near the wear-resistant steel plate. Lubricating grease is injected into the lip seal to lubricate and seal the gap between the wear-resistant steel plate and the cylinder of the screw machine.

4. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 2 is characterized in that: The spiral blade is connected with the rotary blade of the screw machine through a pin shaft.

5. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 1 is characterized by: A hydraulic gate which can be opened and closed is arranged between the two sets of screw machines.

6. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 1 is characterized by: The tail of the latter set of screw machines is provided with a chain pressure relief valve.

7. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 1 is characterized by: A pressurized flushing pipeline is arranged at the bottom of the front end of the quarrying box, and a grille is arranged in front of the slurry discharge pipe at the rear of the quarrying box.

8. The screw conveyor rear-excavation jaw crushing and quarrying system according to claim 1 is characterized by: The jaw crusher includes a fixed plate, an oil cylinder and a toothed jaw plate; the fixed plate is fixed on the quarrying box; there are two oil cylinders and two toothed jaw plates, one end of the two oil cylinders is hinged on both sides of the fixed plate, and the other ends of the two oil cylinders are hinged with the two toothed jaw plates; the fixed plate is hinged with the two toothed jaw plates at the central position of the fixed plate, and the tooth surfaces of the two toothed jaw plates are opposite to each other.

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