JPH0538088Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an opening/closing device provided at the outlet of a storage tank such as a bottle or silo for storing powdered materials such as asphalt mixture or grain.

[Conventional technology]

The conventional opening/closing device installed at the outlet of the storage tank is
A single cutgate or a clam shell double cutgate is rotatably attached to the discharge port of the storage tank using a pivot, and the cutgate is rotated by an opening/closing drive device such as a cylinder to open and close the discharge port.

[The problem that the idea aims to solve]

In the above-mentioned conventional opening/closing device, when discharging the contents of the storage tank directly from the discharge port to the hopper of the weighing device for measurement, it is necessary to adjust the opening degree of the cut gate and the gate opening/closing speed, or the jogging operation to reduce the measurement error. Although it is necessary to set the number of repetitions and the opening/closing speed of the gate appropriately, there is a problem in that it is difficult to obtain high measurement accuracy. If the properties of the contents of the storage tank are always the same and the outflow rate does not seem to change, it is still possible to obtain fairly high measurement accuracy based on past experience, but if the properties of the contents stored in the storage tank are frequently It is not possible to measure accurately if the amount changes.

The present invention provides an opening/closing device for a discharge port in a storage tank that can change the opening area of the discharge port in accordance with the flow rate of the contents and improve measurement accuracy when the properties of the contents differ. The purpose is to

[Means to solve the problem]

In order to achieve the above object, the present invention provides a pair of left and right auxiliary ports, which each have an auxiliary port and are individually attached to the storage tank by a pivot, and which rotate around the pivot to open and close the discharge port of the storage tank. A main gate, a pair of left and right crank means that rotate together with the main gate about the pivot shaft, and their ends are mutually connected between the end of one crank means and the end of the other crank means. an interlocking link provided in connection with the pair of main gates and interlocking the opening/closing operations of the pair of main gates; a main gate opening/closing drive means for simultaneously rotating the pair of main gates to open and close the discharge port; A pair of sub-gates that are individually attached to the pair of main gates and are moved relative to each main gate to open and close the auxiliary ports of the main gate, respectively, and one of the sub-gates is moved to open and close one of the auxiliary ports. The structure includes a first sub-gate opening/closing drive means and a second sub-gate opening/closing means for moving the other sub-gate to open/close the other auxiliary port.

[Effect]

When the fluidity of the contents stored in the storage tank is poor and the outflow speed is slow, the main gate is moved by the main gate opening/closing driving means to open the discharge port and discharge the contents. On the other hand, if the contents have good fluidity and flow out quickly, the subgate is moved by the subgate opening/closing drive means and the auxiliary port formed in the main gate is opened while the main gate closes the discharge port. to discharge the contents from the auxiliary port.

In some cases, the main gate may be opened first to allow the contents to be discharged from the discharge port, and when the contents approach a predetermined amount, the main gate may be used to close the discharge port, and the sub-gate may be moved to open the auxiliary port. This causes the contents to flow out from the auxiliary port at a slow rate until a predetermined amount is reached.

When the two auxiliary ports formed on a pair of main gates are of different sizes, there are a total of four types of openings: a discharge port opening, one auxiliary port opening, the other auxiliary port opening, and both auxiliary port openings. degree can be obtained by simple on/off control of the three opening/closing driving means.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention, and reference numeral 1 in the figures indicates a storage tank such as a silo or a bottle. Two pivots 2 and 3 are provided horizontally and in parallel on the side of the storage tank 1, and the main gates 4 and 5 that open and close the discharge port 1a of the storage tank 1 and a bell crank ( Crank means) 6 and 7 are fixed to each other, and a rotating lever 8 is rotatably supported on one pivot shaft 2. Further, a main gate operation cylinder (main gate opening/closing driving means) 9 is connected to one end 6a of the bell crank 6, and the other end 6b of the bell crank 6 and one end of the other bell crank 7 are connected to each other. End 7a
are bin-coupled via interlocking links 10. Therefore, when the main gate operation cylinder 9 is operated, the main gates 4 and 5 are rotated via the bell crank 6 and the pivot shaft 2, and the other main gate is rotated via the interlocking link 10, the bell crank 7, and the pivot shaft 3. The gate 5 rotates in the opposite direction to the main gate 4.

Auxiliary ports 11 and 12 are provided at the bottoms of the main gates 4 and 5, respectively, and sub-gates 1
3 and 14 are rotatably attached with sub-gate shafts 15 and 16 supported by bearings 17 and 18 fixed to the main gates 4 and 5, respectively. The sub-gates 13 and 14 open and close the auxiliary ports 11 and 12 by rotating around the sub-gate shafts 15 and 16, and an operating lever 1 is attached to the sub-gate shafts 15 and 16.
It has 9,20. Between the one end 6a of the bell crank 6 and the operating lever 19, more specifically, between the end 6a of the bell crank 6 and the rotating lever 8.
between, and the other end 7b of the other bell crank 7.
Sub-gate operating cylinders (sub-gate opening/closing drive means) 21 and 22 are provided between the and operating lever 20, respectively, and an operating lever 19 is connected to the rotary lever 8 via a rod 23.

Next, the operation of the opening/closing device for the discharge port in the storage tank according to the present invention configured as described above will be explained.

In Figures 1 and 2, main gates 4 and 5 are storage tank 1.
The discharge port 1a is closed, and the sub gates 13 and 14 are auxiliary ports 11 and 12 bored in the main gates 4 and 5.
In order to open the discharge port 1a from this state, the main gate operation cylinder 9 is extended and the bell crank 6 is rotated clockwise in FIG. This rotation of the bell crank 6 is transmitted to the main gate 4 via the pivot 2, and is also transmitted to the other main gates 5 via the interlocking link 10, the bell crank 7, and the pivot 3.

As a result, the main gate 4 rotates clockwise in FIG. 1, and the other main gate 5 rotates counterclockwise so as to separate from each other to open the discharge port 1a. This opening operation is performed when the contents contained in the storage tank 1 have low fluidity, for example, and the discharge port 1a is fully opened even if the fluidity is poor. The contents can be discharged at an appropriate speed without any trouble, and the contents can be measured with high accuracy. In addition, simply rotating the bell crank 6 with the main gate operation cylinder 9 will not work.
Since the entire sub-gate operation cylinders 21, 21, rotation lever 8, etc. rotate together with the main gates 4, 5, the sub-gates 13, 14 are separated from the main gates 4, 5 to open the auxiliary ports 11, 12. There isn't.

Furthermore, in order to open the auxiliary ports 11, 12 formed in the main gates 4, 5 from the states shown in FIGS. 1 and 2, the sub-gate operating cylinders 21, 22 are reduced. Due to the contraction of the sub-gate operation cylinder 21, the rotation lever 8 rotates upward about the pivot 2,
In order to pull the operating lever 19 upward via the rod 23, the sub-gate 13 rotates clockwise in FIG. Also, when the other sub-gate operation cylinders 22 are contracted, the operation lever 20
is pulled directly upward, so the sub-gate 14 rotates counterclockwise in FIG.

When the fluidity of the contents in the storage tank 1 is very good, the subgates 13 and 14 are usually opened as described above to discharge the contents from the auxiliary ports 11 and 12. The auxiliary ports 11 and 12 are sufficiently smaller than the discharge port 1a, but if the contents have good fluidity, they will be discharged at a moderate speed without clogging, so even in this case, accurate measurement can be achieved. . Only one of the auxiliary ports 11 and 12 may be opened. When the opening areas of the auxiliary ports 11 and 12 are different, the opening of the discharge port 1a, the opening of one auxiliary port 11, the opening of the other auxiliary port 12, and both auxiliary ports 1
1 and 12 openings, and a total of four types of opening areas can be obtained.

When it is necessary to quickly and accurately weigh the contents, open the main gates 4 and 5 to quickly discharge the contents from the discharge port 1a, and when the discharge amount of the contents approaches the measurement setting value, operate the main gate. The cylinder 9 is contracted and the main gates 4 and 5 close the discharge port 1a, and the sub gates 13 and 1 are operated by the sub gate operation cylinders 21 and 22.
4 to open the auxiliary ports 11 and 12, reducing the discharge speed of the contents and increasing the measurement accuracy.

The main gate operating cylinder 9, the sub-gate operating cylinders 21 and 22, and the bell cranks 6 and 7 related thereto constitute an opening/closing drive device 24. Although the illustrated sub-gates 13 and 14 are configured to rotate to open and close the auxiliary ports 11 and 12, they can also be configured to slide laterally to open and close the auxiliary ports.

[Effect of idea]

As explained above, the opening/closing device for the discharge port in a storage tank according to the present invention has individual auxiliary ports and is individually attached to the storage tank by a pivot, and rotates about the pivot to open the discharge port of the storage tank. A pair of left and right main gates that open and close, a pair of left and right crank means that rotate together with the main gates about the axis, and an end of one crank means and an end of the other crank means. An interlocking link that is provided by interconnecting their ends and that mutually interlocks the opening and closing operations of the pair of main gates, and a main gate that rotates the pair of main gates simultaneously to open and close the discharge port. an opening/closing driving means; a pair of subgates that are individually attached to the pair of main gates and are moved relative to each main gate to individually open and close the auxiliary ports of the main gate; The structure includes a first sub-gate opening/closing drive means for opening and closing the auxiliary port, and a second sub-gate opening/closing means for moving the other sub-gate to open/close the other auxiliary port. The opening area can be changed in up to four stages by simple on/off control.
Therefore, it is possible to select an opening degree suitable for the type and properties of the contents of the storage tank to smoothly discharge the contents, and also to uniformly and precisely weigh various contents with different properties. be able to.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a partially cutaway front view, and FIG. 2 is a bottom view showing the relationship between the main gate, sub-gates, etc. 1... Storage tank, 1a... Discharge port, 2, 3... Pivot, 4, 5... Main gate, 6... Bell crank (crank means), 6b... End, 7... Bell crank (crank means) ), 7a... end, 9...
...Main gate operation cylinder (main gate opening/closing drive means), 10...Interlocking link, 11, 12
...Auxiliary gate, 13,14...Subgate, 21,
22...Sub-gate operation cylinder (sub-gate opening/closing drive means).

Claims (1)

[Scope of utility model registration request] It has auxiliary ports 11 and 12 respectively, and is attached to the storage tank 1 by pivots 2 and 3, respectively, and rotates about the pivots 2 and 3 to open the storage tank 1.
A pair of left and right main gates 4, 5 that open and close the discharge port 1a of the main gates 4, 5, a pair of left and right crank means 6, 7 that rotate together with the main gates 4, 5 about the pivots 2, 3, and one crank. End 6b of means 6
and an end 7a of the other crank means 7, with their ends 6b and 7a interconnected;
An interlocking link 10 that mutually interlocks the opening and closing operations of the pair of main gates 4 and 5, and an interlocking link 10 that rotates the pair of main gates 4 and 5 simultaneously to open and close the discharge port 1.
Main gate opening/closing drive means 9 for opening/closing a.
and are individually attached to the pair of main gates 4, 5, and are moved relative to each main gate 4, 5 to open the auxiliary port 1 of the main gates 4, 5.
a pair of sub-gates 13 and 14 that open and close the auxiliary ports 1 and 12 individually, a first sub-gate opening/closing drive means 21 that moves one of the sub-gates 13 to open and close one of the auxiliary ports 11, and moves the other sub-gate 14. An opening/closing device for a discharge port in a storage tank, comprising a second sub-gate opening/closing means 22 for opening and closing the other auxiliary port 12.