阅读说明：本技术 防卡螺旋输送机 (Anti-sticking screw conveyer ) 是由 聂树广 于 2018-08-14 设计创作，主要内容包括：一种防卡螺旋输送机,包括：壳体,具有物料输送腔以及连通所述物料输送腔的进料口和出料口；转轴,可旋转的设置于所述壳体,位于所述物料输送腔内的所述转轴的外表面上固定设有沿所述转轴延伸的螺旋叶片；沿物料输送方向,所述螺旋叶片的外边缘与所述壳体之间的间隙逐渐增大。因此,在防卡螺旋输送机输送物料的过程中,卡在螺旋叶片和壳体之间的间隙内的物料能够因间隙变大而脱离间隙,不会导致越卡越紧的情况发生,从而能够防止驱动电机过载,防止设备中断,避免防卡螺旋输送机遭受损坏。(An anti-seize screw conveyor comprising: the shell is provided with a material conveying cavity, a feeding hole and a discharging hole which are communicated with the material conveying cavity; the rotating shaft is rotatably arranged on the shell, and a spiral blade extending along the rotating shaft is fixedly arranged on the outer surface of the rotating shaft positioned in the material conveying cavity; along the material conveying direction, the clearance between the outer edge of the spiral blade and the shell gradually increases. Therefore, in the process of conveying materials by the anti-blocking screw conveyor, the materials blocked in the gap between the screw blade and the shell can be separated from the gap due to the increase of the gap, the situation that the materials are more and more tightly blocked can not be caused, the driving motor can be prevented from being overloaded, the equipment is prevented from being interrupted, and the anti-blocking screw conveyor is prevented from being damaged.)

1. An anti-seize screw conveyor comprising:

the shell is provided with a material conveying cavity, a feeding hole and a discharging hole which are communicated with the material conveying cavity;

the rotating shaft is rotatably arranged on the shell, and a spiral blade extending along the rotating shaft is fixedly arranged on the outer surface of the rotating shaft positioned in the material conveying cavity;

characterized in that, along the direction of material transport, the clearance between the outer edge of helical blade and the casing increases gradually.

2. The anti-jamming screw conveyor of claim 1, wherein the material conveying cavity has a cross-sectional area in the material conveying direction that increases in a direction perpendicular to the material conveying direction.

3. The anti-jamming screw conveyor of claim 1, wherein the distance between the outer edge of the screw blade and the shaft decreases gradually in the material conveying direction.

4. The anti-jamming spiral conveyor of claim 1, wherein the housing includes a fixedly connected upper cover and a lower cover, the upper cover and the lower cover enclosing a material conveying chamber;

the lower cover comprises a first wall, a second wall and a first side wall, wherein the first wall and the second wall are oppositely arranged along the material conveying direction, and the first side wall is positioned between the first wall and the second wall;

along material direction of delivery, the distance between first lateral wall and the pivot increases gradually.

5. The anti-jamming spiral conveyor of claim 4, wherein the first side wall intersects a cross section perpendicular to the material conveying direction to form a circular arc segment centered on the axis of rotation.

6. The anti-jamming screw conveyor of claim 4, wherein the side wall intersects a cross section through the rotating shaft to form a straight segment, the straight segment and the rotating shaft having an included angle α therebetween, the included angle α satisfying 0.5 ° - α ° or less and 10 °.

7. The anti-seize screw conveyor according to any one of claims 1 to 6, wherein at least two of said helical blades are provided on said shaft.

8. The anti-seize screw conveyor of any one of claims 1 to 6, wherein the screw blade is provided with a threaded hole adapted to fixedly mount a stopper to protect the screw blade.

9. The anti-seize screw conveyor according to any one of claims 1 to 6, wherein the screw blade is welded and fixed to the rotary shaft.

10. The anti-seize screw conveyor of any one of claims 1 to 6, wherein the outer edges of the screw flights are flash welded with a wear resistant material.

Technical Field

The invention relates to the technical field of material conveying equipment, in particular to an anti-blocking screw conveyor.

Background

The screw conveyor generally includes a housing, a rotating shaft disposed in the housing, and a screw blade fixedly disposed on the rotating shaft, and the rotating shaft is connected to a driving motor. In the working process of the screw conveyor, the driving motor operates to drive the rotating shaft to rotate and drive the helical blades to rotate, and the rotating helical blades push materials to advance so as to achieve the purpose of conveying the materials. The extension direction of the rotating shaft generally determines the conveying direction of the materials, and the screw conveyor can convey the materials horizontally, obliquely and vertically.

To avoid the helical blade touching the housing during rotation of the helical blade, there is typically a gap between the outer edge of the helical blade and the housing. However, in the prior art, the outer edge of the helical blade and the housing all have the same clearance in the material conveying direction. The material in the housing may be caught between the screw blade and the housing, and the material is more and more tightly caught along with the rotation of the screw blade, which easily causes the motor to be overloaded, interrupts the operation of the equipment, and even damages the screw conveyor.

Disclosure of Invention

The invention solves the problem that the spiral conveyor in the prior art has the same clearance between the outer edge of the spiral blade and the shell along the material conveying direction, and materials are easy to be blocked between the spiral blade and the shell, so that the motor is overloaded and even the spiral conveyor is damaged.

In order to solve the above problems, the present invention provides an anti-jamming screw conveyor, comprising: the shell is provided with a material conveying cavity, a feeding hole and a discharging hole which are communicated with the material conveying cavity; the rotating shaft is rotatably arranged on the shell, and a spiral blade extending along the rotating shaft is fixedly arranged on the outer surface of the rotating shaft positioned in the material conveying cavity; along the material conveying direction, the clearance between the outer edge of the spiral blade and the shell gradually increases.

Optionally, along the material conveying direction, the cross-sectional area of the material conveying cavity along a direction perpendicular to the material conveying direction gradually increases.

Optionally, the distance between the outer edge of the helical blade and the rotating shaft gradually decreases along the material conveying direction.

Optionally, the housing includes an upper cover and a lower cover fixedly connected, and the upper cover and the lower cover enclose a material conveying cavity; the lower cover comprises a first wall, a second wall and a first side wall, wherein the first wall and the second wall are oppositely arranged along the material conveying direction, and the first side wall is positioned between the first wall and the second wall; along material direction of delivery, the distance between first lateral wall and the pivot increases gradually.

Optionally, the first side wall intersects with a cross section perpendicular to the material conveying direction to form an arc section with the rotating shaft as a circle center.

Optionally, the side wall intersects with a cross section passing through the rotating shaft to form a straight line segment, an included angle α is formed between the straight line segment and the rotating shaft, and the included angle α satisfies that the included angle is 0.5- α -10 degrees.

Optionally, the rotating shaft is provided with at least two helical blades.

Optionally, the helical blade is provided with a threaded hole adapted to fixedly mount a blocking piece to protect the helical blade.

Optionally, the helical blade is welded and fixed to the rotating shaft.

Optionally, the outer edge of the helical blade is welded with a wear-resistant material.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the anti-jamming screw conveyor comprises a shell, a rotary shaft and a screw blade, wherein the rotary shaft is rotatably arranged on the shell, and the screw blade is fixedly arranged on the rotary shaft. Along material direction of delivery, through making the clearance between helical blade and the casing crescent, then at the in-process of anti-sticking screw conveyer transported substance material, the material of card in the clearance between helical blade and casing can break away from the clearance because of the clearance grow, can not lead to blocking more tight condition emergence to can prevent that driving motor from transshipping, prevent that equipment from breaking off, avoid anti-sticking screw conveyer to suffer damage.

Drawings

FIG. 1 is a schematic structural view of a jam-resistant screw conveyor according to an embodiment of the present invention, wherein a portion of the housing is hidden to show the internal structure of the jam-resistant screw conveyor;

fig. 2 is a schematic structural view of the anti-sticking screw conveyor shown in fig. 1 in the direction a.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1 and 2, an anti-jamming screw conveyor 100 includes a housing 10 enclosing a material conveying cavity 100a, the housing 10 has a feeding port 10a and a discharging port 10b communicating with the material conveying cavity 100a, and the feeding port 10a and the discharging port 10b are arranged along a material conveying direction x. The housing 10 is rotatably provided with a rotating shaft 20, at least a portion of the rotating shaft 20 is located in the material conveying cavity 100a, an axial direction of the rotating shaft 20 is a material conveying direction x, and a helical blade 30 extending along the material conveying direction x is fixedly arranged on an outer surface of the rotating shaft 20 located in the material conveying cavity 100 a. The outer edge 30a of the helical blade 30 has a clearance aa from the housing 10 to ensure that the helical blade 30 does not touch the housing 10 during rotation.

The anti-jamming screw conveyor 100 further includes a driving motor (not shown) connected to the rotating shaft 20 and adapted to drive the rotating shaft 20 to rotate. In the process of conveying materials by using the anti-jamming screw conveyor 100, the driving motor is powered on to work, the rotating shaft 20 is driven to rotate, and the helical blade 30 rotates along with the rotating shaft 20. The material to be conveyed is put into the material conveying cavity 100a from the feeding hole 10a, the material in the material conveying cavity 100a is pushed by the helical blade 30 to move from the feeding hole 10a to the discharging hole 10b, and finally discharged out of the material conveying cavity 100a from the discharging hole 10b, so that the material conveying is completed.

In the present embodiment, the clearance aa between the outer edge 30a of the helical blade 30 and the housing 10 gradually increases along the material conveying direction x. In the process of conveying hard materials such as particulate matters, part of the hard materials are inevitably clamped between the outer edge 30a and the gap aa of the housing 10, and if the gap aa is always kept constant or the gap aa is gradually reduced along the material conveying direction x, the materials clamped in the gap aa are tighter and tighter, which finally causes overload of the driving motor, interruption of equipment operation, and even damage to the anti-clamping screw conveyor 100. Through along material direction of delivery x, make clearance aa crescent, then in rotatory process, the material of card in clearance aa breaks away from clearance aa because of clearance aa grow, can not lead to the situation emergence tight more the card, can prevent driving motor from transshipping, prevents that equipment from breaking off, avoids preventing that calorie spiral conveyer 100 from suffering the damage.

The following ways may be used to gradually increase the gap aa between the outer edge 30a of the helical blade 30 and the housing 10. Firstly, under the condition that the outer diameter of the spiral blade 30 is kept unchanged (namely, the distance L between the outer edge 30a and the rotating shaft 20 is kept unchanged), the sectional area of the material conveying cavity 100a along the direction perpendicular to the material conveying direction x is gradually increased; secondly, under the condition that the cross-sectional area of the material conveying cavity 100a along the direction perpendicular to the material conveying direction x is kept unchanged, the outer diameter of the helical blade 30 along the material conveying direction x is gradually reduced (even if the distance L between the outer edge 30a and the rotating shaft 20 is gradually reduced); thirdly, the sectional area of the material conveying cavity 100a along the direction perpendicular to the material conveying direction x is gradually increased, and the outer diameter of the helical blade 30 along the material conveying direction x is gradually decreased.

In the present embodiment, as shown in fig. 1, the distance L between the outer edge 30a and the rotating shaft 20 is constant along the material conveying direction x, and the cross-sectional area of the material conveying cavity 100a along the direction perpendicular to the material conveying direction x is gradually increased, so as to gradually increase the gap aa between the outer edge 30a and the housing 10.

With continued reference to fig. 1 and 2, the anti-jamming screw conveyor 100 is embodied as a horizontal anti-jamming screw conveyor, and the housing 10 and the rotating shaft 20 extend in a horizontal direction and are adapted to convey materials in the horizontal direction. The housing 10 includes an upper cover 11 and a lower cover 12 fixedly connected to each other, the upper cover 11 and the lower cover 12 enclose a material conveying cavity 100a, a material inlet 10a is disposed on the upper cover 11, and a material outlet 10b is disposed on the lower cover 12.

The lower cover 12 includes a first wall 12a, a second wall 12b disposed opposite to each other along the material conveying direction x, and a first side wall 12c located between the first wall 12a and the second wall 12 b. The distance between the first side wall 12a and the rotation axis 20 gradually increases along the material conveying direction x, that is, the cross-sectional area of the material conveying cavity 100a along the direction perpendicular to the material conveying direction x gradually increases. The upper cover 11 includes third and fourth walls 11a and 11b disposed opposite to each other in the material conveying direction x, and a second side wall 11c between the third and fourth walls 11a and 11 b. The distance between the second side wall 11a and the rotating shaft 20 is constant along the material conveying direction x.

In the process of conveying materials, the anti-jamming screw conveyor 100 conveys materials horizontally, so that a large amount of materials are concentrated on the bottom of the material conveying cavity 100a, namely the first side wall 12c, due to the self-gravity action. Hard materials such as particulate matter are liable to be caught between the first side wall 12c and the outer edge 30a of the spiral blade 30, and are liable to be caught between the second side wall 11c and the outer edge 30a of the spiral blade 30. By increasing the distance between the first side wall 12a and the rotating shaft 20, that is, the gap aa between the first side wall 12a and the outer edge 30a of the helical blade 30 is increased, so that the material clamped in the gap aa can be separated from the gap aa due to the increase of the gap aa, the situation that the material is clamped more and more tightly is not caused, the driving motor can be prevented from being overloaded, the equipment is prevented from being interrupted, and the anti-clamping screw conveyor 100 is prevented from being damaged.

In this embodiment, the first wall 12a and the third wall 11a are screwed and fixed, and the screwed and fixed first wall 12a and the fixed third wall 11a form a first mounting hole 20 a; the second wall 12b and the fourth wall 11b are screwed and fixed, and the screwed and fixed second wall 12b and the fixed fourth wall 11b form a second mounting hole (not shown in the figure). The rotating shaft 20 is rotatably disposed in the first mounting hole 20a and the second mounting hole. The rotating shaft 20 outside the material conveying cavity 100a may be connected to a driving motor, so that the driving motor drives the rotating shaft 20 to rotate.

The first side wall 12c intersects a cross section perpendicular to the material conveying direction x to form an arc section with the rotating shaft 20 as a circle center, namely, the first side wall 12c is a truncated conical surface, the first side wall 12c intersects a cross section passing through the center line of the rotating shaft 20 to form a straight line section, an included angle α is formed between the straight line section and the rotating shaft 20, and the included angle α is more than or equal to 0.5 degrees and less than or equal to α and less than or equal to 10 degrees.

The size of the included angle α determines the degree of gradual increase of the gap aa between the outer edge 30a of the spiral blade 30 and the first side wall 12c, if the included angle α is larger, the increasing speed of the gap aa is relatively faster, and if the included angle α is smaller, the increasing speed of the gap aa is relatively slower.

Optionally, the included angle α between the straight line segment and the rotating shaft 20 is controlled to meet the condition that α is more than or equal to 5 degrees and less than or equal to 7 degrees, so that the risk that the material is stuck between the helical blade 30 and the first side wall 12c is reduced on the premise that the material is not stacked in the material conveying cavity 100a to a large extent.

Specifically, in the present embodiment, the clearance aa between the outer edge 30a of the spiral vane 30 and the first side wall 12c at the position of the feed port 10a satisfies: aa is more than or equal to 5mm and less than or equal to 20mm, and can be selected as 15 mm. The clearance aa between the outer edge 30a of the helical blade 30 at the position of the discharge port 10b and the first side wall 12c satisfies: aa is more than or equal to 60mm and less than or equal to 80mm, and can be selected as 70 mm.

It should be understood that the anti-jamming screw conveyor 100 of the present embodiment is a horizontal anti-jamming screw conveyor because the housing 10 and the rotating shaft 20 extend in a horizontal direction to horizontally convey the material. In other modifications, the housing 10 and the rotating shaft 20 may be designed to extend in a direction forming a certain angle with the horizontal plane, so as to realize inclined material conveying; alternatively, the housing 10 and the rotary shaft 20 are designed to extend in a vertical direction to achieve the transfer of the materials in the vertical direction. The implementation of the technical scheme is not influenced.

In addition, the second side wall 11c may also be made in a truncated conical shape like the first side wall 12 c.

With continued reference to FIG. 1, the helical blade 30 is provided with a threaded bore 30b, and the helical blade 30 is adapted to receive a stop (not shown) through the threaded bore 30 b. Generally speaking, the helical blade 30 is relatively complex to machine and relatively expensive to produce. When the anti-seize screw conveyor 100 conveys materials such as iron blocks and stone blocks, if the screw blade 30 is directly contacted with the materials, the screw blade 30 is quickly abraded, the screw blade 30 is damaged, and the service life of the screw blade 30 is shortened. By fixedly arranging the baffle plate and the like on the helical blade 30, the helical blade 30 can be protected, and the helical blade 30 is prevented from being damaged.

Further, when the material is located in the gap aa between the outer edge 30a of the spiral blade 30 and the housing 10, the material may exert a force on the outer edge 30a of the spiral blade 30 to wear the outer edge 30a of the spiral blade 30. Specifically, the wear-resistant material is deposited on the outer edge 30a, so that the helical blade 30 has better wear resistance, heat resistance and corrosion resistance, and the service life of the helical blade 30 is further prolonged.

During the operation of the anti-seize screw conveyor 100, the screw blade 30 pushes the material to move, and the screw blade 30 always receives a relatively large acting force. If the helical blade 30 is not firmly connected to the shaft 20, there is a great risk of breakage. In this embodiment, to ensure the reliability of the helical blade 30, the helical blade 30 is welded and fixed to the rotating shaft 20 to increase the connection stability of the helical blade 30.

As shown in fig. 1, in the present embodiment, a helical blade 30 is fixedly disposed on the rotating shaft 20. In another modification, two or more spiral blades 30 may be provided on the rotating shaft 20, and the more the spiral blades 30 are, the higher the efficiency of the anti-seizing spiral conveyor 100 in conveying the material is.

The feeding hole 10a is arranged at the top of the casing 10, the anti-jamming screw conveyor 100 further comprises a feeding bin 40, the feeding bin 40 is communicated with the feeding hole 10a, and the material to be conveyed is suitable for being placed in the feeding bin 40. When the anti-jamming screw conveyor 100 works, the feeding hole 10a is opened, the material in the feeding bin 40 can enter the material conveying cavity 100a through the self gravity, and the helical blade 30 exerts acting force on the material conveying cavity to realize conveying.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.