CN214035681U - Soil loosening mechanism and screw conveyor - Google Patents
Soil loosening mechanism and screw conveyor Download PDFInfo
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- CN214035681U CN214035681U CN202120013757.XU CN202120013757U CN214035681U CN 214035681 U CN214035681 U CN 214035681U CN 202120013757 U CN202120013757 U CN 202120013757U CN 214035681 U CN214035681 U CN 214035681U
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- loosening mechanism
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Abstract
The utility model relates to a soil body not hard up mechanism and screw conveyer, including drive unit and driven unit, driven unit includes barrel and slide, at a plurality of slides of the inner wall slidable mounting of barrel, a plurality of slides radial symmetry arrange and around barrel inner wall round, the one end and the drive unit contact of slide, drive unit promotes the slide along axial displacement, make with the slide contact the soil body not hard up. The utility model discloses greatly reduce the number of times of having avoided the soil body to harden even, if the soil body takes place when hardening, the utility model discloses also can not hinder the construction process, reduce construction cost.
Description
Technical Field
The utility model belongs to the technical field of the shield constructs the machine, a screw conveyer is related to, especially avoids the soil body not hard up mechanism and screw conveyer that the soil body hardens.
Background
Along with the development of economy in China, overground space resources are more and more limited, people turn the attention to the development of underground space, shield construction is a safe and efficient construction method, common shield machine types comprise an earth pressure balance shield machine and a muddy water balance shield machine, and the earth pressure balance shield machine has the advantages of small occupied area, high construction speed, low construction cost and the like, so that the number of shields in shield engineering is absolute dominance. Due to the reasons of geological change, construction sites and the like, taking an earth pressure balance shield machine as an example, a screw conveyor is one of key systems of the earth pressure balance shield machine, the screw conveyor can convey soil bodies cut off by a cutter disc in a sealed cabin to a soil outlet at the upper part of the screw conveyor under the action of a propeller, then the muck is conveyed to a trolley by adopting a belt conveying mode, and finally the muck is discharged out of a shield body. The soil mass conveyed by the screw rod is compressed to form a sealed soil plug, so that the soil pressure in the sealed cabin is stabilized. The screw conveyer driven and controlled by hydraulic pressure can control the rotating speed of the screw conveyer according to the feedback of the pressure in the sealed cabin and the electrical proportion of the variable pump, so that a certain soil pressure is kept in the sealed cabin, and the soil pressure is balanced with the pressure of an excavation surface. However, the problem of soil hardening and blocking at the soil discharge outlet of the screw conveyor is easy to occur in the conveying process, so that the change of soil pressure in the sealed cabin is caused, the balance of the pressure of the excavation surface and the pressure of the sealed cabin is further damaged, the collapse of the excavation surface is possibly caused finally, and construction accidents are caused. A plurality of methods are adopted at home and abroad to solve the problem, the most used method is to wash hardened soil blocks by using water pipes manually, and the method has the obvious defects of time consumption, more manpower and material resources, excessive water accumulation in the excavated tunnel, poor working environment and potential safety hazard. In addition, the method is that a plurality of rods are arranged on the shaft of the conveyor to stir the soil body, and the method also has obvious defects that the occupied space of the conveyor is too large, and the stirring effect still cannot meet the requirement of fully discharging the residue soil.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide a soil body that can avoid the soil body to harden not hard up mechanism and screw conveyer.
The utility model provides a technical scheme that technical problem adopted is:
the utility model provides a soil body loosening mechanism, includes drive unit and driven unit, driven unit includes barrel and slide, at a plurality of slides of the inner wall slidable mounting of barrel, a plurality of slides radial symmetry arrange and around barrel inner wall round, the one end and the drive unit contact of slide, drive unit promotes slide along axial displacement, make the soil body not hard up with the slide contact.
And the sliding installation is that a plurality of guide grooves are symmetrically formed in the inner wall of the cylinder body in the radial direction, the guide grooves are all arranged along the axial direction, a spring is arranged in each guide groove, a guide rod is fixedly arranged on one surface of the sliding plate, the guide rod is embedded into the guide grooves, the sliding plate slides along the guide grooves through the guide rods, one end of each guide rod is in contact with the spring, and the other end of each guide rod is in contact with the driving unit.
And the driving unit is of a cam structure and comprises a plurality of arc-shaped bulges, the arc-shaped bulges are radially and symmetrically formed on the edge of a rotating disc, and one end of the guide rod is in contact with the arc-shaped bulges.
Furthermore, the end of the slide plate facing the drive unit is made in the shape of an arc.
And one end of the guide rod is positioned in the middle of the sliding plate, the other end of the guide rod is positioned at one end of the sliding plate facing the driving unit, and the guide rod extends out of one end of the sliding plate facing the driving unit by a certain distance.
And, the guide bar diameter is slightly less than the guide way diameter, and the opening width of guide way is 1/3 ~ 1/2 of guide way diameter.
Moreover, the end surface of the guide rod contacted with the arc-shaped bulge is made into a cambered surface.
And the axial length of the sliding plates enables the sliding plates to cover the guide grooves, and the gap between every two adjacent sliding plates is smaller than the grain size of soil.
A screw conveyor comprising: the soil loosening mechanism is arranged in the material barrel between a discharge port of the spiral conveyor and the engine, a driving unit of the soil loosening mechanism is coaxially and fixedly arranged at the end part of the screw, the screw is connected with the engine of the spiral conveyor through the driving unit, a driven unit of the soil loosening mechanism is arranged at one end, close to the engine, of the inner part of the material barrel of the spiral conveyor, and the outer wall of a barrel body of the driven unit is attached to the inner wall of the material barrel and fixedly arranged.
The utility model has the advantages that:
the utility model discloses at the not hard up mechanism of soil body of screw conveyer's feed cylinder discharge gate top installation, greatly reduce and avoided the soil body number of times that hardens even, if the soil body takes place when hardening, this device can not hinder the construction process yet, the cost is reduced. The device represents excellent performance and good economic benefit compared with a screw conveyor without any device or with other devices.
Drawings
Fig. 1 is a schematic view of the internal structure of the screw conveyor of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the soil loosening mechanism of the present invention;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is a schematic view of the structure of the guide groove and the spring on the inner wall of the cylinder;
FIG. 6 is a perspective view of the slide plate;
FIG. 7 is a schematic perspective view of a driving unit;
fig. 8 is an external structural schematic view of the screw conveyor of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
A soil loosening mechanism comprises a driving unit and a driven unit, wherein the driving unit is coaxially and fixedly arranged at the end part of a screw rod 2, the screw rod is connected with an engine 9 of a spiral conveyor through the driving unit, the driving unit rotates along with the screw rod, and the driven unit is arranged at one end, close to the engine, in a material barrel 1 of the spiral conveyor. The driving unit is of a cam structure and comprises a plurality of arc-shaped protrusions 7 which are radially and symmetrically manufactured on the edge of a rotating disc 8. The driven unit comprises a cylinder body 3 and sliding plates 5, the outer wall of the cylinder body is fixedly installed with the inner wall of a charging barrel of the spiral conveyor, a plurality of sliding plates are installed on the inner wall of the cylinder body in a sliding mode, and the sliding plates are radially and symmetrically arranged and surround the inner wall of the cylinder body for one circle. One end of the sliding plate is in contact with the arc-shaped bulge of the driving unit, the driving unit rotates, and the arc-shaped bulge pushes the sliding plate to enable the sliding plate to move along the axial direction, so that the sliding plate is in contact with a soil body to be loosened, and hardening is avoided.
The sliding installation is that a plurality of guide grooves 10 are symmetrically formed in the inner wall of the cylinder body in the radial direction, the guide grooves are all arranged along the axial direction, a spring 4 is installed in each guide groove, a guide rod 6 is fixedly installed on one surface of the sliding plate, the guide rods are embedded into the guide grooves, and the sliding plate slides along the guide grooves through the guide rods. One end of the guide rod is in contact with the spring, and the other end of the guide rod is in contact with the arc-shaped protrusion of the driving unit. When the guide rod is in contact with the high point of the arc-shaped bulge, the arc-shaped bulge pushes the guide rod to compress the spring at the other end of the guide rod, and when the guide rod leaves the highest point of the arc-shaped bulge, the spring rebounds to drive the guide rod to return to the initial position.
The one end of slide towards drive unit make the arc, the one end of guide bar is located the middle part of slide, and the other end is located the arc end of slide and stretches out arc end a section distance. One end of the sliding plate is designed into an arc shape, so that the resistance between the guide rod and the driving unit can be reduced.
The preferred apex of the arcuate projection is 90mm from its base plane and then smoothly transitions to both ends.
The preferred barrel external diameter size is 810mm, and the barrel outer wall is tightly laminated with the feed cylinder inner wall, makes 12 guide ways on the barrel, and the guide way diameter is 18 mm.
The guide bar diameter is slightly less than the guide way diameter to guarantee that the guide bar can slide in the guide way, the opening width of guide way is 5mm, can prevent the radial follow guide way roll-off of guide bar.
The sliding plates are tightly attached to the inner wall of the barrel body, and the 12 sliding plates are tightly wound into a circle around the inner wall of the barrel body, so that gaps among the sliding plates are prevented, and soil is prevented from being deposited in the gaps. The slide will be 120mm longer than the length of the guide bar, when the spring is in natural state, the slide can cover the spring and the opening of the guide groove, preventing the earth from flowing into the opening of the guide groove and the spring.
The local soil loosening mechanism is arranged in a charging barrel between a discharge port 11 of the screw conveyor and the engine.
The utility model discloses a theory of operation does:
the drive unit rotates along with the rotation of the screw rod of the screw conveyor, when the arc-shaped protrusion of the drive unit is contacted with the guide rod, the guide rod is pressed to the spring, the sliding plate moves towards the spring, when the guide rod slides to the highest point of the arc-shaped protrusion, the spring is in a compressed state, when the guide rod leaves the arc-shaped protrusion, the spring applies resilience force to the guide rod, the arc-shaped top end of the guide rod is tightly attached to the turntable, and the sliding plate moves towards the turntable. The heights of the arc-shaped bulges contacted by the two adjacent guide rods are different, so that the two adjacent sliding plates have relative motion, and soil hardening is prevented.
From the economic effect, when soil hardening is prevented without any device, the hardening times per month are about 10 times, the dredging cost is as high as more than 400 yuan, the soil hardening influences the construction each time, and the construction progress is influenced, so that the indirect economic loss is caused. When soil hardening is prevented by other devices, the soil hardening times per month are about 6 times, and the dredging cost is added, and the construction progress is influenced by the hardening, so that great economic loss is caused. The device greatly reduces or even avoids the times of soil body hardening, and if the soil body is hardened, the device can not delay the construction process, thereby reducing the cost. Therefore, the device represents excellent performance and good economic benefit compared with the screw conveyor without any device or with other devices.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the spirit of the present invention, and these modifications and improvements are all within the protection scope of the present invention.
Claims (9)
1. The utility model provides a soil body loosening mechanism which characterized in that: including drive unit and driven unit, driven unit includes barrel and slide, at a plurality of slides of the inner wall slidable mounting of barrel, and a plurality of slides radial symmetry arrange and around barrel inner wall round, the one end and the drive unit contact of slide, drive unit promote the slide along axial displacement, make the soil body not hard up with the slide contact.
2. The soil loosening mechanism of claim 1 wherein: the sliding installation is that a plurality of guide grooves are symmetrically formed in the inner wall of the cylinder body in the radial direction, the guide grooves are all arranged along the axial direction, a spring is arranged in each guide groove, a guide rod is fixedly arranged on one surface of the sliding plate, the guide rods are embedded in the guide grooves, the sliding plate slides along the guide grooves through the guide rods, one end of each guide rod is in contact with the spring, and the other end of each guide rod is in contact with the driving unit.
3. The soil loosening mechanism of claim 2, wherein: the driving unit is of a cam structure and comprises a plurality of arc-shaped bulges, the arc-shaped bulges are radially and symmetrically formed on the edge of a turntable, and one end of the guide rod is in contact with the arc-shaped bulges.
4. A soil loosening mechanism as claimed in claim 1, 2 or 3, wherein: the end of the sliding plate facing the driving unit is made into an arc shape.
5. The soil loosening mechanism of claim 2, wherein: one end of the guide rod is located in the middle of the sliding plate, the other end of the guide rod is located at one end, facing the driving unit, of the sliding plate, and the other end of the guide rod extends out of one end, facing the driving unit, of the sliding plate by a certain distance.
6. The soil loosening mechanism of claim 2, wherein: the diameter of the guide rod is slightly smaller than the diameter of the guide groove, and the opening width of the guide groove is 1/3-1/2 of the diameter of the guide groove.
7. The soil loosening mechanism of claim 3, wherein: the end surface of the guide rod contacted with the arc-shaped bulge is made into an arc surface.
8. The soil loosening mechanism of claim 2, wherein: the axial length of the sliding plates enables the sliding plates to cover the guide grooves, and the gap between every two adjacent sliding plates is smaller than the grain size of soil.
9. A screw conveyor comprising a soil loosening mechanism as claimed in any one of claims 1 to 8, wherein: the method comprises the following steps: the soil loosening mechanism is arranged in the material barrel between a discharge port of the spiral conveyor and the engine, a driving unit of the soil loosening mechanism is coaxially and fixedly arranged at the end part of the screw, the screw is connected with the engine of the spiral conveyor through the driving unit, a driven unit of the soil loosening mechanism is arranged at one end, close to the engine, of the inner part of the material barrel of the spiral conveyor, and the outer wall of a barrel body of the driven unit is attached to the inner wall of the material barrel and fixedly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120013757.XU CN214035681U (en) | 2021-01-05 | 2021-01-05 | Soil loosening mechanism and screw conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120013757.XU CN214035681U (en) | 2021-01-05 | 2021-01-05 | Soil loosening mechanism and screw conveyor |
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| CN214035681U true CN214035681U (en) | 2021-08-24 |
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| CN202120013757.XU Active CN214035681U (en) | 2021-01-05 | 2021-01-05 | Soil loosening mechanism and screw conveyor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814694A (en) * | 2021-01-05 | 2021-05-18 | 中铁十九局集团轨道交通工程有限公司 | Soil loosening mechanism and screw conveyor |
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2021
- 2021-01-05 CN CN202120013757.XU patent/CN214035681U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814694A (en) * | 2021-01-05 | 2021-05-18 | 中铁十九局集团轨道交通工程有限公司 | Soil loosening mechanism and screw conveyor |
| CN112814694B (en) * | 2021-01-05 | 2022-07-29 | 中铁十九局集团轨道交通工程有限公司 | Soil loosening mechanism and screw conveyor |
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