JPH09169418A - Vertical separation type air floating belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure by separating a carrier side trough and a return side trough in the vertical direction so as to utilize them as a strength member, and to reduce the pressure loss of the floating compressed air by utilizing a trough connecting member as an air duct for the floating compressed air. SOLUTION: Troughs 1, 2, which are separated in the vertical direction, are formed at the nearly same diameter, and in the condition that these troughs l, 2 are arranged in the vertical direction with the predetermined space, a connecting member 3 is provided at a distance from a core C of both the troughs 1, 2 in the cross direction so as to connect both the troughs l, 2. A space surrounded by both the troughs 2, 2, and the connecting member 3 is formed into an air duct D1 , and an air duct D2 is provided under the lower trough, and a carrying belt B inside of the upper trough 1 and the lower trough 2 is floated by the compressed air, which is supplied from these air ducts D1 , D2 , in the semi-circular condition along circulars of both the troughs 1, 2 so as to carry a material M to be carried. A strength member is thereby formed of both the troughs 1, 2 and the connecting member 3 so as to simplify the structure, and the reciprocating transportation of the material M to be carried is enabled by the upper and the lower troughs 1, 2.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The invention according to the present application conveys bulk materials (eg, coal, gypsum and wet ash in a thermal power plant, iron ore and auxiliary raw materials in a steel plant) by a belt floated by compressed air. More specifically, the present invention relates to an air levitation type belt conveyor in which the troughs on the transport side and the return side are vertically separated.

[0002]

2. Description of the Related Art In recent years, an air levitation system has been used as a means for transporting loose materials (for example, coal, gypsum and wet ash in thermal power plants, iron ore and auxiliary raw materials in ironworks, etc.). A belt conveyor may be used.
This air levitation type belt conveyor has low vibration and low noise, and is therefore useful depending on the place of use.

As a prior art of such an air levitation type belt conveyor, there is an invention described in Japanese Patent Laid-Open No. 4-317911. In this invention, an overall schematic view of FIG. 4 and a perspective view of a main part of FIG. 5 are shown. As shown in FIG. 5, the conveyor is an outer tube 51 (hereinafter referred to as “outer trough”) and an inner tube 5 arranged inside the outer tube 51.
2 (hereinafter referred to as “inner trough”) having a double pipe structure, the inner trough 52 as a transport side (hereinafter referred to as “carrier side”), and the outer trough 51 as a return side (hereinafter referred to as “return side”). The belt 53, which has been used and has conveyed the object to be conveyed through the inner trough 52, is configured to be reversed on the head pulley 54 side and return through the inside of the outer trough 51.

In order to float the belt in the air floating type belt conveyor, compressed air having a predetermined pressure is supplied from the outside to the contact surface between the outer trough 51 and the inner trough 52 and the belt 53, and this air causes the inner trough 52 to fly. On the side, the belt 53 is floated by a predetermined amount to carry the transported object M, and on the outer trough 51 side, only the belt 53 is floated by a predetermined amount and returned.

However, since the inner trough 52 does not act as a sufficient strength member in such a double pipe structure, a strength member such as a truss frame or gallery is provided as a member for supporting both troughs 51 and 52. Must be installed. In this case, the installation space becomes large and the amount of steel used also increases, which is uneconomical.

On the other hand, as a prior art in which the troughs forming the conveyor body are separated into upper and lower parts, the actual construction is 4-5611.
There is a device described in Japanese Patent No. 5 publication, and according to this device, a trough can be used as a strength member. This device is shown in Figure 6.
As shown in the sectional view of FIG. 1, the upper trough 61 and the lower trough 62 are vertically separated, and the spaces between them are connected by the air chamber frame 63, and the compressed air supplied from the blower 64 into the air chamber frame 63 is supplied to the air supply branch. It is supplied from the pipe 65 through the adjusting valve 65a into the upper trough 61 and the lower trough 62, and in the upper trough 61, the conveyor belt 66 that conveys the object to be conveyed is floated, and in the lower trough 62, it is made into a complete cylindrical shape. The conveyor belt 66 is floated. The air-floating belt conveyor configured as described above is supported by the pillar 67.

[0007]

SUMMARY OF THE INVENTION However, it is an object of the above air levitation type belt conveyor to provide an air levitation type belt conveyor having a function of correcting the meandering of a conveyor belt and having an excellent ability to convey an object to be conveyed. Because,
The air chamber frame 63 at the center connecting the carrier side trough 61 and the return side trough 62 has upper and lower troughs 61,
62 is provided only with a function as a connecting member and a function as an air chamber, and the air chamber frame 63 is not provided with a function as a strength member for supporting the entire air levitation type belt conveyor. .

That is, in this air levitation type belt conveyor, the width dimension of the air chamber frame 63 is the carrier side trough 6
Since it is formed to be narrower than the outer diameter of 1, it does not function sufficiently as a strength member for supporting the conveyor body, and the conveyor as a whole is fixed to the trough 61 on the carrier side. It is supported by 67. Moreover, since the return side trough 62 has a smaller diameter than the carrier side trough 61, the center of gravity is 6
Since it is located above the central portion of 1, 62, the sectional modulus of the conveyor as a whole also becomes small.

Therefore, in this air levitation type belt conveyor, a strength member such as a truss frame provided with many columns to support the whole conveyor is required, and the amount of steel used is the same as in the above air levitation type belt conveyor. Many are poor in productivity.

Further, the air floating type belt conveyor is
Since compressed air is supplied from the central air chamber frame 63 to both troughs 61 and 62 via the air supply branch pipe 65 and the adjustment valve 65a, the compressed air supply port required to float the conveyor belt 66 is provided. For example, if it is provided at a pitch of 150 mm, many branch pipes 65 and adjustment valves 65a must be provided, the structure becomes complicated and it is necessary to take measures against damage to the branch pipes 65 or the adjustment valve 65a. Therefore, it takes a lot of time and cost to manufacture, and it becomes a very uneconomical air floating belt conveyor.

Further, in this air levitation type belt conveyor, since the belt 66 on the return side is completely cylindrical and the belt edge is on the lower side, the conveyed object can be conveyed only on the carrier side. On the other hand, the return side cannot transport the transported object. Therefore, it is not possible to deal with the reciprocal transportation that requires the conveyance of the transported object on the carrier side and the transport of the transported object on the return side.

In view of the above problems, the invention according to this application simplifies the structure by vertically separating the trough on the carrier side and the trough on the return side and using them as a strength member, and the connecting member of the trough is floated. It is an object to provide an upper and lower separation type air levitation belt conveyor that can reduce the pressure loss of levitation compressed air by using it as an air duct for compressed air for use.
Another object of the present invention is to provide an upper and lower separation type air levitation type belt conveyor capable of reciprocating transportation by a separated trough.

[0013]

In order to achieve the above object, an upper and lower separation type air levitation type belt conveyor according to claim 1 has cylindrical troughs which are vertically separated and which is supplied from the lower part of both troughs. In the air-floating belt conveyor that conveys the object to be conveyed by levitating the conveyor belt with the compressed air, the troughs separated into the upper and lower sides are formed with substantially the same diameter, and the troughs are vertically separated by a predetermined distance. A connecting member is provided at a position separated from the axial center of both troughs in the width direction to connect both troughs, and a space surrounded by the both troughs and the connecting member is formed in an air duct, and a lower trough is provided below the lower trough. An air duct for use is provided, and the conveyor belts inside the upper trough and the lower trough are levitated in a semi-circular shape along the arcs of both troughs by compressed air supplied from the air duct and the air duct. It is characterized in that for conveying the conveying object. The connecting member may be a member that connects the upper trough and the lower trough and can form an air duct between them. Specifically, when both troughs are connected, a wall surface continuous in the longitudinal direction is formed. It can be achieved by such a plate-shaped member.

As described above, the upper and lower separated troughs are made to have substantially the same diameter, and the two troughs are connected by the connecting member, so that the strength of the air floating belt conveyor can be secured by the trough and the connecting member. Therefore, it is possible to configure a vertically separated air levitation type belt conveyor having a simplified structure. Further, since the internal space formed by both troughs and the connecting member is used as an air duct for compressed air, a large volume air duct can be easily formed, reducing pressure loss of compressed air and reducing blower pressure. And the number of blowers can be reduced. further,
Since the upper trough and the lower trough have almost the same diameter, it is possible to convey the conveyed object under almost the same conditions as the upper trough, even with the conveying belt that floats in a semi-circular shape in the lower trough. Round-trip transportation is possible.

According to a second aspect of the present invention, there is provided an upper and lower separation type air levitation type belt conveyor, wherein in the first aspect, a connecting member provided at a position apart from the axial center of both troughs in the width direction is provided on the conveyor belt with a width of an object to be conveyed. The width of the trough is substantially the same as that of the transfer belt. Since the weight of the transported object to be conveyed can be directly received by the connecting member, the vertically separated trough and the connecting member act advantageously as a strength member for the entire air floating belt conveyor.

According to a third aspect of the present invention, there is provided an upper and lower separation type air levitation type belt conveyor in which the space surrounded by both troughs and the connecting member is formed as an air duct of the upper trough, and the lower trough is formed. It is characterized in that an air duct for the lower trough is provided in the lower part of the above, and the system for supplying the compressed air to both air ducts is configured by separate systems.In this way, the compressed air to be supplied to the upper trough and the lower trough are separated. By supplying in a system, optimum compressed air can be supplied according to the loads on both conveyor belts.

An upper and lower separation type air levitation type belt conveyor according to claim 4 is characterized in that:
A control means for detecting the load acting on the upper trough conveyor belt and the load acting on the lower trough conveyor belt and controlling the amount of compressed air supplied to the upper trough and the lower trough according to both loads is provided. By detecting the load acting on the upper and lower conveyor belts and controlling the amount of compressed air in this way, both conveyor belts can be conveyed both when conveying only the upper trough and when conveying both upper and lower troughs. A required amount of compressed air can be supplied to each trough so that the flying height can be optimally maintained.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention according to the present application will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the basic structure of a vertically separated air levitation type belt conveyor according to this application. (A) is an overall structural view and (b) is an enlarged view of the X part of (a). .

As shown, a cylindrical upper trough 1 and
The upper trough 1 and a cylindrical lower trough 2 having substantially the same diameter are provided vertically spaced apart by a predetermined distance, and these are connected by a connecting member 3 continuous in the longitudinal direction. The connecting member 3 is provided at a predetermined position apart from the axial center C of both troughs 1 and 2 in the width direction, and an air duct D is provided in a space formed by the connecting member 3, the upper trough 1 and the lower trough 2. ₁ is formed. In this example, the space formed by the connecting member 3 and the upper trough 1 and the lower trough 2 is formed as a carrier side air duct D ₁ , and air for supplying compressed air from this air duct D ₁ to the lower surface of the conveyor belt B. The supply holes 4 are provided at a predetermined pitch in the longitudinal direction of the upper trough 1.

The connecting member 3 is preferably a plate-shaped member capable of forming a continuous space in the longitudinal direction inside by connecting the upper and lower troughs 1 and 2. Both the troughs 1 and 2 are continuous in the longitudinal direction. The two side walls of the air duct D ₁ are formed by the connection. The connecting position between the connecting member 3 and the troughs 1 and 2 has a width smaller than the outer diameter of the troughs 1 and 2 and is substantially the same as the width of the object to be conveyed on the conveyor belt B. In addition, the trough 1 is provided so as to face the axis C of the trough 1 in a symmetrical position, and the load of the transported object M can be directly received between the connecting members 3.

According to the two troughs 1 and 2 thus connected by the connecting member 3, both the troughs 1 and 2 and the connecting member 3 function as a strength member of the belt conveyor itself.
The belt conveyor itself has sufficient strength.
In addition, since the troughs 1 and 2 have substantially the same diameter, the center of gravity is also substantially in the center of the connecting member 3, which is advantageous in terms of section modulus.

Further, an air duct D ₂ is formed by providing a box-shaped member 5 having a relatively large volume under the lower trough 2, and the compressed air is supplied from the air duct D ₂ to the lower surface of the conveyor belt B. The air supply holes 6 are provided at a predetermined pitch in the longitudinal direction of the lower trough 2.

The air duct D _{1 of the} upper trough ₁
A compressed air supply line L ₁ of each separate system for air duct D ₂ of the lower trough 2, L ₂ are connected, each of these compressed air supply line L _1, L ₂ flow regulating valve b _1, b ₂ are provided, and the lines on the upstream side of these flow rate adjusting valves b ₁ and b ₂ are connected to the blower 7. Accordingly, the compressed air from the blower 7 and is supplied respectively to both flow control valve b _1, air duct from the flow rate adjusted above the trough 1 by b ₂ D ₁ and air duct D ₂ below the trough 2.

According to the vertically separated air levitation type belt conveyor F constructed as above, the structure is simplified by the following actions, or the pressure loss of the levitation compressed air is reduced, or the object to be conveyed is conveyed. It is possible to make a reciprocating conveyance.

That is, the cross-section coefficient and the second moment of inertia as a strength member are defined by the troughs 1 and 2 which are vertically separated by a predetermined distance and separated from each other, and the connecting member 3 which connects the troughs 1 and 2 and which is continuous in the longitudinal direction. Since the air levitation type belt conveyor F itself is made to have a large size, columns for supporting the entire upper and lower separation type air levitation type belt conveyors can be provided at a wide interval to some extent. It is possible to simplify the structure by reducing the number of constituent members of F.

Further, since the upper and lower separation type air levitation type belt conveyors F themselves have sufficient strength, an auxiliary structure such as a corridor can be provided from the belt levitation type belt conveyors themselves. It is possible to greatly simplify the entire structure of the facility in which F is provided.

Further, the upper and lower troughs 1 and the connecting member 3
By configuring the space as a duct D ₁ formed by the, it is possible to increase the capacity of the air duct D _1, to reduce the pressure loss of the compressed air, in the long distance conveyor installation number of the blower 7 It becomes possible to reduce the blower pressure, and in the short distance conveyor, the blower pressure can be reduced to reduce the size of the blower 7.

Moreover, since the upper trough 1 and the lower trough 2 have substantially the same diameter, the conveyor belts B running in these troughs 1 and 2 are both semicircular arcs along the arcs of the lower portions of the troughs 1 and 2. That is, since the object M to be conveyed is floated while the both edge portions of the belt are curved upward, the object M to be conveyed is conveyed by the conveyor belt B of the upper trough 1 and the reverse belt B is conveyed by the conveyor belt B of the lower trough 2. It is possible to transport the transported object M in any direction, and it is possible to easily transport the same transported object back and forth or different transported objects back and forth.

Since the upper trough 1 and the lower trough 2 have substantially the same diameter, it is possible to easily provide an inspection port or the like, and the inspection from this inspection port can be easily performed.

By the way, the air duct D of the upper trough 1
₁ and the compressed amount of air supplied to the air duct D ₂ below the trough 2 is regulated by the flow control valve b _1, b ₂ provided on the carrier side pipe L ₁ and the return pipe L _2.

As means for adjusting the flow rates b ₁ and b ₂ , load signals (for example, motor current) when the object M to be conveyed is conveyed only by the conveyor belt B on the carrier side, and both the carrier side and the return side. The load signals when the object M is conveyed by the conveyor belt B are detected, and these signals are input to the control means (for example, "microcomputer") to be operated, whereby the carrier side air duct is operated from this control means. To D
₁ may be to control the amount of compressed air supplied to the compressed air quantity is supplied and the return-side air duct D _2.
This adjustment is performed by increasing the opening degree of the flow rate adjusting valve b ₁ on the carrier side and decreasing the opening degree of the flow rate adjusting valve b ₂ on the return side when the object M is conveyed only on the carrier side. When the object M to be conveyed is conveyed by the belts 1 and 2, both the carrier side b2 and the return side flow rate adjusting valve b2 are controlled so as to have a large opening degree.

FIG. 2 is a sectional view showing an embodiment in which the vertically separable air levitation type belt conveyor F according to this application is provided as an elevated air levitation type belt conveyor. In this example, upper and lower troughs are connected. An example is shown in which the upper and lower separation type air levitation belt conveyors F having sufficient strength as the belt conveyor itself are installed in an elevated manner by a strength member composed of members.

Since the belt conveyor itself has sufficient strength as described above, the columns 8 are provided at relatively wide intervals along the outer wall of the connecting member 3, and a relatively wide area above the column 8 is connected to the connecting member. By fixing the support member 9 to the support member 3, the support member 9 is provided on the side of the support column 8 and the stairs 10 and the corridor 11 are provided.
Can also be installed, and the design according to the installation conditions and the like of the vertically separated air levitation type belt conveyor F can be relatively freely performed. In addition, 12 is a handrail provided beside the stairs and the corridor. Further, the structure for supplying compressed air is omitted.

Further, as shown in the cross-sectional view of FIG.
It is also possible to easily arrange the bases in parallel and to provide the corridor 15 between them. In this example, struts 13 are directly provided on the lower portions of both lower troughs 2, and a support member 14 is provided between these struts 13.
A corridor 15 is provided on the upper part of the support member 14. Also in this case, since the upper trough 1, the lower trough 2, and the connecting member 3 are connected to each other, the member is sufficiently strong as an air floating type belt conveyor. Therefore, even the columns 13 provided only on the lower trough 2 are separated from each other vertically. The whole type air floating belt conveyor can be supported. When supported by such a column 13, there is no structure protruding beyond the troughs 1 and 2, so that a large-capacity air floating belt conveyor F can be installed in a small space. In addition, about the same structure as the structure mentioned above in this example, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Further, the configuration for supplying compressed air is omitted.

The structure of the corridor 15 and the structure 11 of the corridor as described above may be appropriately selected according to the installation conditions of the vertically separated air levitation type belt conveyor and the conditions of the transported object. According to the vertical separation type air levitation type belt conveyor according to this application, since the strength member of the conveyor is constituted by both the troughs 1 and 2 and the connecting member 3, it is possible to design with a wide degree of freedom of peripheral equipment. Becomes

In each of the above-described embodiments, an example of carrying the object M by the upper trough 1 on the carrier side is shown, but in any of the embodiments, the lower trough 2 on the return side is also used. The object M can be conveyed as indicated by the chain double-dashed line, and the reciprocating transportation between the carrier side and the return side can be easily realized.

Further, in any of the above embodiments, as shown in FIG. 1, the air ducts D ₁ and D of the upper trough 1 and the lower trough 2 are formed.
It is possible to control the compressed air supplied to ₂ , and in this case, as described above, the compressed air amount is controlled according to the carrier conditions on the carrier side and the return side.

[0039]

The invention according to the present application is configured as described above, and has the following effects.

According to the upper and lower separation type air levitation belt conveyors according to claims 1 to 4, the upper trough, the lower trough and the connecting member function as a strength member for the entire air levitation belt conveyor. The structure for supporting the belt conveyor can be simplified, and since the large space surrounded by both troughs and the connecting member is formed as an air duct, the pressure loss of the compressed air can be reduced and the blower It is possible to reduce the number and pressure, which makes it very economical. Further, since the upper and lower troughs have almost the same diameter, the transport belts in both troughs can carry out reciprocating transportation under substantially the same conditions.

In particular, according to the upper and lower separation type air levitation type belt conveyor of the second aspect, since the load of the conveyed object acting on the trough can be directly received by the connecting member,
It is possible to increase the strength of the air levitation type belt conveyor itself and further simplify the configuration of the columns or the like for supporting the entire air levitation type belt conveyor.

Particularly, according to the upper and lower separation type air levitation type belt conveyor according to the third aspect, it is possible to easily finely adjust the compressed air amount according to the transport state of the upper trough and the lower trough.

In particular, according to the upper and lower separation type air levitation type belt conveyor according to the fourth aspect, it becomes possible to automatically control the amount of compressed air according to the carrying state of the upper trough and the lower trough.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a basic configuration of an upper / lower separation type air levitation type belt conveyor according to this application, (a) is an overall configuration diagram, and (b) is an enlarged view of an X portion of (a).

FIG. 2 is a cross-sectional view showing an example in which the vertically separated air levitation belt conveyor according to this application is provided as an elevated air levitation belt conveyor.

FIG. 3 is a cross-sectional view showing an example of a case where two vertically separated air levitation type belt conveyors according to this application are installed side by side.

FIG. 4 is an overall schematic view showing a conventional air floating type belt conveyor.

5 is a perspective view of essential parts of the air floating belt conveyor shown in FIG. 4. FIG.

FIG. 6 is a cross-sectional view showing a conventional vertically separated air levitation type belt conveyor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper trough 2 ... Lower trough 3 ... Connection member 4 ... Air supply hole 5 ... Box-shaped member 6 ... Air supply hole 7 ... Blower 8,13 ... Strut 9,14 ... Support member 10 ... Stairs 11, 15 ... Walkway 12 ... handrail C ... axis B ... conveyor belt M ... transported object D _1, D ₂ ... air ducts L _1, L ₂ ... compressed air supply line b _1, b ₂ ... flow control valve F ... vertically separate type air floating belt Conveyor

Claims (4)

[Claims] 1. An air levitation type belt conveyor having upper and lower cylindrical troughs, which conveys an object to be conveyed by levitating a conveyor belt with compressed air supplied from the lower portions of the troughs. The troughs are formed to have substantially the same diameter, and the two troughs are connected to each other by providing a connecting member at a position spaced in the width direction from the axial center of the two troughs with the two troughs vertically separated from each other by a predetermined distance. A space surrounded by the connecting member and the connecting member is formed in an air duct, an air duct for the lower trough is provided under the lower trough, and a conveyor belt inside the upper trough and the lower trough is provided by the air duct and compressed air supplied from the air duct. An air levitation belt conveyor of the upper and lower separation type, characterized in that the object to be conveyed is floated in a semi-circular shape along the arcs of the lower parts of both troughs. 2. The connecting member provided at a position spaced apart from the axial center of both troughs in the width direction is provided with a width dimension substantially the same as the width dimension of the transported object on the transport belt.
The upper and lower separation type air floating belt conveyor described. 3. A space surrounded by both troughs and a connecting member is formed as an air duct for the upper trough, an air duct for the lower trough is provided under the lower trough, and a system for supplying compressed air to both air ducts is a separate system. The upper and lower separation type air levitation type belt conveyor according to claim 1 or 2, wherein 4. A control means for detecting the load acting on the conveyor belt of the upper trough and the load acting on the conveyor belt of the lower trough, and controlling the amount of compressed air supplied to the upper trough and the lower trough according to both loads. Is provided.
The upper and lower separation type air levitation type belt conveyor according to any one of 3 above.