JP5727332B2 - Screw conveyor device - Google Patents

Description

  The present invention relates to a screw conveyor device configured to be able to convey a conveyed product introduced from one end side of a trough to the other end side by rotating a screw disposed in a trough or cylindrical trough. In particular, the present invention relates to a screw conveyor device configured to be able to measure an instantaneous transportation amount and a cumulative transportation amount of a conveyed product.

  When it is necessary to continuously convey a solid, fluid, or semi-fluid treatment target in various facilities, for example, sewage discharged from an apparatus that performs a certain treatment in a sewage sludge treatment facility. In the case where sludge sludge, dewatered cake, dried sludge, or the like is continuously conveyed toward an apparatus for performing the next processing, an apparatus called a screw conveyor is often used conventionally. In a conventional general screw conveyor device, a screw is arranged in a trough or cylindrical trough, and the screw is continuously rotated by a motor, and thereby an introduction port formed on one end side of the trough. The introduced processing object is transported toward the other end of the trough and can be discharged from the discharge port.

JP 2002-240923 A Japanese Patent Laid-Open No. 2004-224666

  By the way, in a system in which a processing object is transported between a plurality of processing apparatuses, if the transport amount of the processing object to be transported can be grasped, the processing amount of each processing apparatus and the processing object This is effective for controlling properties (water content, etc.). However, in the conventional screw conveyor apparatus, the transport amount of the processing object cannot be measured.

  The present invention has been made to solve the conventional technology as described above, and provides a screw conveyor device capable of measuring the instantaneous transportation amount and the cumulative transportation amount of a processing object (conveyed object). Objective.

The screw conveyor apparatus according to the present invention has a single screw disposed in a trough or cylindrical trough, and the screw is continuously rotated by a motor so that the screw conveyor device can be rotated from an inlet formed on one end side of the trough. The introduced transported material is transported toward the other end of the trough, and can be discharged from the discharge port. The trough that accommodates a single screw is divided into a measuring unit and a transporting unit. The trough of the conveyor and the trough of the transport unit are elastically connected to each other at the joint portion via an elastic sealing material, and measure the screw feed speed or the rotational speed to the shaft that transmits the rotational driving force to the screw ( (Speed detector) is connected and the measured value is sent to the accumulator, and introduced into the trough between the trough of the measuring unit and the means (leg) supporting it A weight meter (load cell) for measuring the weight of the conveyed product is arranged and the measured value is transmitted to the accumulator. In the accumulator, the measured value of the screw feed speed or the rotational speed and the trough The instantaneous transportation amount of the conveyed product is calculated and displayed based on the measured value of the weight of the conveyed product introduced into the vehicle, and is displayed.

  The joint portion includes a trough flange of the measurement unit, a flange of the trough of the conveyance unit, an elastic seal material, a bolt, and a nut. The flange of the trough of the measurement unit and the flange of the trough of the conveyance unit are intermediate. It is preferable to elastically connect the trough of the measuring section and the trough of the transport section by abutting with an elastic sealing material sandwiched between them and fastening the bolt and nut elastically with a spring interposed. Furthermore, the cumulative transport amount can be calculated by integrating the instantaneous transport amount value calculated by the accumulator from the start or reset, and displayed together with the instantaneous transport amount, or can be switched. It is preferable to configure as described above.

  The screw conveyor device according to the present invention can measure the instantaneous transport amount and the cumulative transport amount of the transported material continuously introduced into the trough, and can handle the processing amount and processing target of each processing device disposed in the subsequent stage. It is possible to use it suitably when trying to control the properties (water content, etc.).

FIG. 1 is a partial side view of a screw conveyor device 1 according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the trough 2 and the screw 3 taken along line XX shown in FIG. FIG. 3 is an enlarged view of the joint portion 12 shown in FIG. FIG. 4 is an enlarged view of the joint portion 12 shown in FIG.

  Here, the form for implementing this invention is demonstrated. FIG. 1 is a partial side view of a screw conveyor device 1 according to a first embodiment of the present invention. 1 (1) shows a side surface near the front end of the screw conveyor device 1, and FIG. 1 (2) shows a side surface near the rear end. As shown in these drawings, the screw conveyor device 1 includes a trough 2, a screw 3 disposed therein, a motor 4 that supplies rotational driving force to the screw 3, and a plurality of troughs 2 that support the trough 2 from below. It is comprised by the leg part 5, the integrating meter which is not shown in figure, a control apparatus, etc.

  As shown in FIG. 2 (a cross-sectional view of the trough 2 and the screw 3 taken along the line XX shown in FIG. 1), the trough 2 is formed so that the cross section is U-shaped as a whole. Is closed by side plates 21a, 21b (see FIG. 1). A flat lid plate 6 is placed on the upper edge portion (upper edge flange 22) of the trough 2. The lid plate 6 is fixed to the upper edge flange 22 of the trough 2 by bolts or clamps (not shown). The lid plate 6 is disposed over the entire length of the trough 2 (25 m in the present embodiment), and the upper edge opening portion of the trough 2 is configured to be almost entirely closed by the lid plate 6.

  The screw 3 disposed inside the trough 2 is set to a dimension slightly shorter than the entire length of the trough 2 (the distance between the side plates 21a and 21b at both ends of the trough 2), and the rear side (FIG. At the end on the right side in 2), the shaft 8 is connected. The shaft 8 is rotatably supported, passes through the side plate 21b on the rear side of the trough 2, and is motively connected to the drive shaft of the motor 4 via a speed reducer or the like. The rotational driving force of the motor 4 is transmitted to the shaft 8 and further transmitted to the screw 3. A speed detector 13 is attached to the shaft 8 so that the feed speed of the screw 3 is measured and the measured value is transmitted to the accumulator.

  Of the inner surface of the trough 2, a liner 9 (see FIG. 2) made of ultra-high molecular weight polyethylene is disposed on the curved inner surface of the lower half, and friction resistance when the screw 3 rotates in the trough 2. Is reduced.

  In the vicinity of the end of the trough 2 on the front side (left side in FIG. 1 (1)), an introduction port 10 for introducing a conveyed product into the trough 2 is formed. The introduction port 10 is configured to face a through-hole formed in the cover plate 6 and is connected to a discharge port of a processing device disposed in the front stage of the screw conveyor device 1 or a hopper.

  In the vicinity of the rear end portion of the trough 2, a discharge port 11 for discharging the conveyed product from the inside of the trough 2 to the outside is formed. The discharge port 11 is configured to face a through-hole formed in a curved portion on the lower half side of the trough 2, and is connected to an introduction port of a processing device disposed at a subsequent stage of the screw conveyor device 1.

  The screw conveyor device 1 has a joint portion 12 as a boundary and a front side thereof (more specifically, from a side plate 21a at a front side end portion of the trough 2 to a predetermined range (3.1 m in the present embodiment)). Is configured as a measurement unit A, and the rear side of the joint unit 12 is configured as a conveyance unit B. The introduction port 10 described above is formed in the cover plate 6A of the measurement unit A, and the discharge port 11 is formed in the trough 2B of the transport unit B.

  The trough 2 </ b> A of the measurement unit A and the trough 2 </ b> B of the transport unit B are elastically connected at the joint unit 12. More specifically, as shown in FIG. 3, the joint portion 12 includes a flange 14A of the trough 2A of the measuring portion A, a flange 15A of the cover plate 6A, a flange 14B of the trough 2B of the transport portion B, and a flange 15B of the cover plate 6B. And the elastic sealing material 16 and fastening means (bolts 17 and nuts 18). The flanges 14A and 15A and the flanges 14B and 15B are butted together with the elastic sealing material 16 sandwiched between them, and bolts 17 and nut 18 are connected by fastening.

  As shown in FIG. 3, the bolt 17 and the nut 18 are elastically fastened with a spring 19 having an appropriate elasticity (with an appropriate spring constant) interposed therebetween, and Since the elastic sealing material sandwiched between the flanges 14A and 15A and the flanges 14B and 15B also has an appropriate elastic force, the trough 2A and the cover plate 6A of the measuring unit A are transported as shown in FIG. The trough 2B and the lid plate 6B of the part B are elastically connected in a swingable state.

  The trough 2A of the measurement unit A and the trough 2B of the transport unit B are both supported by the leg 5 from below. However, the trough 2B of the transport unit B is supported in a fixed state on the leg 5, while the trough 2A of the measurement unit A is supported in an unfixed state. And between the trough 2A of the measurement part A and the leg part 5 which supports this, four load cells 20 (weighing scales) are arranged at positions spaced apart in the longitudinal direction and the lateral width direction of the trough 2A, respectively. (Four point support) (see FIG. 1 (1)), the weight of the conveyed product introduced into the trough 2A from the introduction port 10 is measured and transmitted to the accumulator.

  The screw conveyor apparatus 1 according to the present embodiment is configured as described above, and can measure the instantaneous transportation amount and the cumulative transportation amount of the conveyed product. Specifically, first, the screw conveyor device 1 is formed in the measuring unit A by continuously rotating the screw 3 in a predetermined direction by the rotational driving force output from the motor 4 as in the conventional device. The conveyed product introduced into the trough 2 </ b> A from the introduced inlet 10 can be conveyed toward the other end of the trough 2 and discharged from the outlet 11.

  And when a conveyed product is introduced into the trough 2A from the introduction port 10, the weight of the introduced conveyed product (the weight of the conveyed product per 1 m in the conveying direction (longitudinal direction of the trough 2), unit: kg / m) is The measurement value is measured by the measurement unit A, and the measurement value is converted into an electrical signal and output, and transmitted to the accumulator. The speed detector 13 attached to the shaft 8 measures the feed speed of the screw 3 (the number of revolutions per minute × the pitch of the screw 3, unit: m / min), and the measured value is converted into an electric signal. It is converted and output, and sent to the accumulator.

  In addition, the weight of the conveyed product is calculated based on the total value of the weights measured by the four load cells 20 (such as the trough 2A, the cover plate 6A, the introduction port 10, the screw 3 in the measuring unit A, etc.). (Weight value measured by the load cell 20 at the time) is subtracted and divided by the total length (3.1 m) of the measuring part A.

  The accumulator electrically multiplies the signal transmitted from the load cell 20 (the value of the weight of the conveyed product) and the signal transmitted from the speed detector 13 (the feed speed of the screw 3), thereby instantaneously conveying the conveyed item. The transport amount (unit: kg / min) is output and displayed. The unit for displaying the instantaneous transportation amount can be further multiplied by “60” to be “kg / h”. In addition, the total transportation amount can be output by integrating the transportation amount calculated in this way from the time of start or reset, and displayed together with the instantaneous transportation amount, or can be switched. it can.

In the present embodiment, a shaftless screw is used as the screw 3. However, the present invention is not necessarily limited to this, and a screw in which a spiral flight (screw blade) is fixed around the shaft may be used. it can. Further, in the present embodiment, the speed detector 13 is configured to measure the feed speed of the screw 3, but the rotational speed (unit: min ⁻¹ ) of the screw 3 is measured and the measured value ( Signal) is transmitted to the accumulator, and the feed speed of the screw 3 can be calculated in the accumulator based on the measured value of the rotational speed.

  Moreover, in this embodiment, although the load cell is used as a weighing scale which measures the weight of a conveyed product, another weighing scale can also be used.

1: Screw conveyor device,
2, 2A, 2B: trough,
3: Screw,
4: Motor,
5: Leg,
6, 6A, 6B: lid plate,
8: Shaft,
9: Liner,
10: introduction port,
11: outlet,
12: Joint part
13: Speed detector
14A, 14B, 15A, 15B: flange,
16: elastic sealing material,
17: Bolt,
18: Nut,
19: Spring,
20: Load cell,
21a: side plate,
21b: side plate,
22: Upper edge flange,
A: Measurement unit,
B: Transport section

Claims (3)

A screw is placed in a trough or cylindrical trough, and the screw is continuously rotated by a motor, so that the transported material introduced from the inlet formed at one end of the trough In the screw conveyor device configured to be conveyed toward the other end side and discharged from the discharge port,
It said trough for accommodating a single screw, is split a measuring unit in the transport unit,
The trough of the measurement unit and the trough of the transport unit are elastically connected to each other through an elastic sealing material in the joint unit.
A measuring instrument that measures the screw feed speed or the number of rotations is connected to the shaft that transmits the rotational driving force to the screw, and the measurement value is configured to be transmitted to the accumulator.
Between the trough of the measuring unit and the means for supporting the same, a weighing scale for measuring the weight of the transported object introduced into the trough is arranged, and the measured value is transmitted to the accumulator. ,
In the accumulator, the instantaneous transport amount of the transported object is calculated and displayed based on the measured value of the screw feed speed or rotational speed and the measured value of the weight of the transported object introduced into the trough. A screw conveyor device that is configured. The joint portion includes a trough flange of the measurement unit, a trough flange of the transport unit, an elastic seal material, a bolt, and a nut.
The flange of the trough of the measuring unit and the flange of the trough of the transport unit are butted together with an elastic sealing material sandwiched between them, and the bolt and nut are elastically fastened with a spring interposed. The screw conveyor device according to claim 1.   By integrating the instantaneous transportation amount calculated by the accumulator at the time of starting or resetting, the cumulative transportation amount can be calculated and displayed together with the instantaneous transportation amount or can be switched. The screw conveyor device according to claim 1, wherein the screw conveyor device is configured.

Images