JP2017187112A - Device for opening and closing shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for opening and closing a shutter which improves a manufacturing capacity of a plant by surely delivering a stored object such as a cement slurry from a container in short time.SOLUTION: In a device for opening and closing a shutter for discharging an object in a container 21 by opening and closing a shutter 34 provided at a discharge port 33 of the container 21, a slider 35 is provided at the shutter 34 and a driving shaft 46 is provided through a driving shaft hole 36 of the slider 35, in which a cross groove 47 is formed on an outer circumference of the driving shaft 46 at a predetermined length which crosses with each other in a spiral manner. At both ends of the cross groove 47, a reverse groove 48 is provided continuously with the cross groove 47. A fitting hook 40 of a swingable piece 38 provided on the slider 35 is freely fitted to the cross groove 47 so as to reciprocally move the slider 35 by a one-direction rotation of the driving shaft 46.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shutter opening / closing device used in the case where cement slurry is kneaded in a container to produce a cement slurry in batch, and the cement slurry is quickly sent out from the container.

A method of producing a cement slurry by kneading cement and water shown in FIG. 12 in a container is known (Patent Document 1).
The method described in Patent Document 1 includes a predetermined amount of cement and water (including bentonite, sand, aggregate, etc., if necessary) from the cement supply port 11 and the water supply port 12 in the kneading container 10 of the primary container. ) Are sequentially supplied to the container 10, and a vertical drive shaft 13 to which a stirring blade 15 is attached is rotated by a drive mechanism 14 and stirred and kneaded to produce a cement slurry.

The kneaded cement slurry opens the discharge valve 18, is sent out from the discharge port 16 by the pump 17, and is sent through the feed pipe 20 to the mixer 19 of the secondary container.
This type of cement slurry is produced in a so-called batch, which is produced in a predetermined amount (for example, in units of 1000 liters), and a plurality of batches are sequentially sent to the next secondary container and conveyed to a construction site or the like while being stirred.
In batch production in the primary container, each measuring operation of water, bentonite, cement, etc., mixing and mixing, and sending out the mixed cement slurry constitute one time cycle. Plant manufacturing capacity is determined.

Japanese Patent Publication No. 5-85332

In the conventional method shown in FIG. 12, in the time cycle of the weighing work, the stirring work, and the sending work, the sending work opens the discharge valve 18 and sends it from the discharge port 16 to the delivery pipe 20 by the pump 17. In general, a butterfly valve is often used as the valve 18. The butterfly valve is disposed in the middle of the delivery pipe 20, and a circular valve body is attached to the shaft passing through the center, and the delivery pipe 20 is opened by rotating the shaft 90 degrees.
In such a butterfly valve, one semicircular portion opens in the direction of the cement slurry flow, while the other semicircular portion opens in a direction against the flow of the cement slurry. A heavy load is applied. Further, the shaft at the center of the valve body obstructs the flow of the cement slurry, and in particular, it takes time to send out the cement slurry, which limits the production capacity of the plant.
A so-called knife gate valve that opens and closes the knife plate in a direction orthogonal to the delivery pipe 20 may be used instead of the butterfly valve. However, the mechanism for moving the knife plate back and forth is complicated and expensive. Alternatively, the knife plate advances and retreats along the groove and opens and closes, so that there is a problem that the slurry is clogged with cement slurry and cannot be completely closed.

  It is an object of the present invention to provide a shutter opening / closing device that enhances the production capacity of a plant by reliably sending out a kneaded cement slurry container from a container in a short time, and that has a simple opening / closing mechanism and less failure. It is what.

  The shutter opening and closing device according to the present invention is a shutter opening and closing device for opening and closing the shutter 34 provided at the discharge port 33 of the container 21 and discharging the contents in the container 21. The drive shaft 46 penetrates the drive shaft hole 36 of the slider 35, and a spiral cross groove 47 is formed on the outer periphery of the drive shaft 46 with a predetermined length. At both ends of the cross groove 47, a reversing groove portion 48 that is continuous with the cross groove 47 is provided. The slider 35 is reciprocated by rotation of the shaft 46 in one direction.

  In the first embodiment, a shutter 34 is directly connected to the slider 35, and the shutter 34 is slid along the discharge port 33 by the reciprocation of the slider 35.

  The shutter 34 may be one-sided, but in order to improve the discharge workability, the drive shaft 46 is provided with two predetermined lengths of cross grooves 47, and the sliders 35 are fitted in the cross grooves 47, respectively. Desirably, the pawl body 40 is loosely fitted, and a shutter 34 directly connected to each slider 35 is provided to be double-opened.

  The fitting claw body 40 goes straight at the crossing position of the cross groove 47 and changes its direction at the reversing groove 48, and the fitting claw body 40 does not move to another crossing groove at the crossing point of the cross shaft 47. Like that.

  In the second embodiment, a rack 55 provided on the slider 35 and a pinion 56 provided on the shutter 34 are engaged with each other, and the shutter 34 can be opened and closed by a reciprocating motion of the slider 35.

According to the first aspect of the present invention, in the shutter opening and closing device for opening and closing the contents in the container by opening and closing the shutter provided at the discharge port of the container,
A slider is provided on the shutter, the drive shaft is passed through the drive shaft hole of the slider, cross grooves that cross each other are formed in a predetermined length on the outer periphery of the drive shaft, and continuous with the cross grooves at both ends of the cross groove. A reversing groove portion is provided, and a fitting claw body of a swinging piece provided on the slider is loosely fitted in the cross groove, and the slider is reciprocated by rotation in one direction of the drive shaft, so that the shutter is opened and closed. However, the rotation for opening and closing the drive shaft and the rotation for closing operation can be opened and closed only in one direction without controlling forward and reverse, and the control circuit for opening and closing can be configured easily. it can. In addition, the shutter is not a circle like a butterfly valve, but can be configured in a square shape or any other shape, and the contents in the container are approximately twice as large as the circular valve (capacity is approximately 4 times larger). ), And the contents can be discharged efficiently and in a short time. Furthermore, the structure is simple and inexpensive compared to a knife gate valve.

  According to the second aspect of the present invention, the shutter is directly connected to the slider, and the shutter is slid along the discharge port by the reciprocating movement of the slider. The slurry can be quickly delivered to the secondary container by its own weight without using a pump from the discharge port, and the plant production capacity per hour can be increased.

  According to the third aspect of the present invention, the drive shaft is provided with the predetermined length of the cross grooves at two locations, the fitting claws of the respective sliders are loosely fitted in the respective cross grooves, and the shutters are directly connected to the respective sliders. Since the two shutters are opened, the mutually opposite movements of the two shutters can be controlled by one drive shaft and the drive shaft can be controlled in the same rotational direction. Moreover, it can discharge quickly.

  According to the fourth aspect of the present invention, since the fitting claw body has a slender shape that goes straight at the cross groove crossing position and changes its direction at the reversing groove portion, the fitting claw body is reversed at the cross groove crossing point. Therefore, the shutter can be reliably opened and closed in one rotation direction of the drive shaft.

  According to the fifth aspect of the present invention, the rack provided on the slider and the pinion provided on the shutter are engaged, and the shutter is opened and closed by the reciprocating motion of the slider. It can be opened and discharged by utilizing the weight of the stored item, and when closed, it can be reliably closed in an unloaded state. In addition, since the groove in which the shutter slides is not required, there is no possibility that the contents are clogged in the groove.

It is a top view which shows Example 1 of the opening / closing apparatus of the shutter by this invention. It is a longitudinal cross-sectional view of the shutter opening and closing device according to the present invention. (A) is sectional drawing of the state which opened the shutter 34 of the opening-and-closing apparatus of the shutter of this invention, (b) is sectional drawing of the state which closed the shutter 34 similarly. 1 is a side view of a shutter opening and closing device according to the present invention. (A) is a longitudinal sectional view of the slider 35 according to the present invention, and (b) is a front view of the slider 35 according to the present invention. It is a disassembled perspective view of the rocking | fluctuation piece 38 and the piece holding body 39 by this invention. FIG. 4 is a development view of a drive shaft 46 of a shutter opening / closing device according to the present invention. The drive shaft 46 of the shutter opening / closing apparatus by this invention is shown, (a) is a top view, (b) is a side view, (c) is a bottom view. 1 is a perspective view of a shutter opening and closing device according to the present invention. It is sectional drawing which shows Example 2 of the opening / closing apparatus of the shutter by this invention. 3 shows a third embodiment of the shutter opening and closing device according to the present invention, in which (a) is a sectional view showing an example in which a plurality of discharge ports 33 are opened and closed in a single opening, and (b) a plurality of discharge ports 33 are double-opened It is sectional drawing which shows the example opened and closed by. It is the front view partly cut away of the conventional cement and water kneading apparatus.

  The shutter opening and closing device according to the present invention is a shutter opening and closing device for opening and closing the shutter 34 provided at the discharge port 33 of the container 21 and discharging the contents in the container 21. And a cross groove 47 that penetrates the drive shaft 46 in the drive shaft hole 36 of the slider 35 and intersects each other on the outer periphery of the drive shaft 46 is formed in a predetermined length, and the cross groove 47 is formed at both ends of the cross groove 47. A reversing groove 48 that is continuous with the slider 35 is fitted into the cross groove 47, and the fitting claw body 40 of the swing piece 38 provided on the slider 35 is loosely fitted. Move back and forth.

  A shutter 34 is directly connected to the slider 35, and the shutter 34 is slid along the discharge port 33 by the reciprocating motion of the slider 35.

  The drive shaft 46 is provided with two cross shafts 47 having a predetermined length, the fitting claws 40 of the respective sliders 35 are loosely fitted in the respective cross grooves 47, and the shutters 34 directly connected to the respective sliders 35 are opened. can do.

  The fitting claw body 40 moves straight at the crossing position of the cross groove 47 and changes its direction at the reversing groove portion 48, so that the fitting claw body 40 can move without being reversed at the crossing point of the cross groove 47. .

  A rack 55 provided on the slider 35 and a pinion 56 provided on the shutter 34 are engaged with each other, and a shutter opening and closing device that opens and closes the shutter 34 by swinging by the reciprocating movement of the slider 35 can be provided.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 21 denotes a cylindrical stirring container composed of a side wall 22, a bottom part 23, and a lid body 24, and has a capacity capable of kneading, for example, 1000 liters of cement slurry. An inner shaft 28 and an outer shaft 29 are provided at the inner central portion of the stirring vessel 21, and the inner blade 31 and the outer blade 32 are connected to each other, and the middle shaft 28 and the outer shaft 29 are coupled by a gear 30. The inner blade 31 and the outer blade 32 rotate in opposite directions and are stirred. The lid body 24 is provided with a cement supply port 25, a bentonite supply port 26, and a water supply port 27, and weighed cement, bentonite, and water are supplied thereto, respectively. In Example 1, the stirring container 21 capable of kneading the cement slurry is illustrated, but the contents are not limited to the cement slurry, and the stirring container may be a container other than stirring, and is limited to this example. It is not something that can be done.

The bottom 23 is provided with a rectangular discharge port 33 at a position where the middle shaft 28 and the outer shaft 29 are shifted. A shutter 34 including a first shutter 34a and a second shutter 34b for opening and closing the discharge port 33 is provided on the lower surface of the discharge port 33 so as to be movable in the horizontal direction. Further, one drive shaft 46 is arranged on both sides of the shutter 34 in parallel and rotatably. A first slider 35a integrally provided on both sides of the first shutter 34a and a second slider 35b integrally provided on both sides of the second shutter 34b are slidably fitted to these drive shafts 46. doing.
The drive shaft 46 is a circular shaft, and on the outer periphery of the drive shaft 46, as shown in FIGS. 7 and 8, spiral cross grooves 47 intersecting at an angle of about 15 to 30 degrees have two predetermined lengths. It is formed with. These cross grooves 47 are for reciprocation of the first shutter 34a and for reciprocation of the second shutter 34b. In this example, the cross groove 47 intersects twice by one rotation of the drive shaft 46. At both end positions of the cross groove 47, a reversing groove portion 48 is formed for changing the direction of a fitting claw body 40 of a swing piece 38 to be described later.

Since the first slider 35a and the second slider 35b have the same structure, they will be described with the same reference numeral 35 based on FIG. 5, FIG. 6, and FIG. The cross groove 47 on the outer periphery of the drive shaft 46 in FIG. 9 is not shown.
In these drawings, the slider 35 is fixed to the shutter 34, the drive shaft 46 passes through the drive shaft hole 36 of the slider 35, and the guide shaft hole 37 below the drive shaft hole 36 has a guide shaft. 54 penetrates. The slider 35 is provided with a stepped hole 57 penetrating in a direction orthogonal to the drive shaft hole 36, and the swing piece 38 is swingably fitted into the stepped hole 57. The swinging piece 38 has a disk shape, and is provided with a fitting claw body 40 fitted to the cross groove 47 on the lower surface. A protruding portion 42 protrudes at the center of the upper surface, and an arc shape slightly outside the protruding portion 42. Is formed. The swinging piece 38 is covered with a piece holding body 39, and the projection 42 is loosely fitted in the engaging hole 44 at the center of the lower surface of the piece holding body 39 and penetrates from above the piece holding body 39. A swing shaft 43 protruding from the lower surface is loosely fitted in the swing groove 41, and the piece holder 39 is fixed to the slider 35 with a fixing screw 45.

  As shown in FIGS. 7 and 8, the cross groove 47 of the drive shaft 46 has a groove width that allows the fitting claw body 40 to be loosely fitted. The fitting claw body 40 has a long and narrow shape that can go straight at the crossing portion of the cross groove 47 and can reverse the direction at the reverse groove portion 48 described later. The lower surface of the fitting claw body 40 has an arc shape that substantially matches the curved surface of the bottom of the cross groove 47. Further, both ends of the cross groove 47 are formed with inversion groove portions 48 that are curved so that the fitting claws 40 can change the direction from the forward movement to the backward movement while being in contact with the side wall of the cross groove 47. When the fitting claw body 40 of the swinging piece 38 changes its direction, the projection 42 is fitted into the engaging hole 44, and the swinging shaft body 43 is loosely fitted into the swinging groove 41 and swings.

As shown in FIGS. 1 and 4, the two drive shafts 46 have the same rotation of the motor 49 provided at the intermediate position regardless of whether the shutter 34 is opened or closed with the left and right timing belts 58 and pulleys 50 interposed therebetween. Rotate in the direction.
In FIG. 9, moving rollers 52 are attached to both outer side surfaces of the shutter 34, and move while being placed on rails 51 provided integrally with the stirring container 21.

The effect | action by the above structures is demonstrated.
(1) With the discharge port 33 of the stirring vessel 21 closed by the shutter 34 (the first shutter 34a and the second shutter 34b), water is measured and supplied from the water supply port 27, the bentonite is measured and the bentonite supply port 26 is measured. The cement is weighed and fed from the cement supply port 25.
(2) The introduced water, bentonite and cement are stirred and kneaded with the inner blade 31 and the outer blade 32 for a certain time to form a slurry batch.
(3) When the slurry batch is formed, the shutter 34 is opened.

The opening operation of the shutter 34 will be described in detail.
As shown in FIG. 3B, when the first shutter 34a is closed, the fitting claw body 40 of the swing piece 38 is at the position of the reverse groove 48 at the right end of the cross groove 47 shown in FIG. When the second shutter 34 b is closed, the fitting claw body 40 of the swing piece 38 is in the position of the reverse groove 48 at the left end of the cross groove 47.
In order to open the shutter 34 (the first shutter 34a and the second shutter 34b), the drive shaft 46 is rotated.
The fitting claw body 40 of the swing piece 38 in the first shutter 34a moves along the cross groove 47 in the dotted line direction of FIG. FIG. 7 is a development view of the drive shaft 46, and therefore, the fitting claw body 40 is described as moving. However, the fitting claw body 40 is actually fitted in the cross groove 47 in the dotted line direction. With the rotation maintained, the drive shaft 46 moves in the left direction.

Similarly, the fitting claw body 40 of the swing piece 38 in the second shutter 34b moves along the cross groove 47 in the solid line direction of FIG. Since FIG. 7 is a development view of the drive shaft 46, it is described that the fitting claw body 40 is moved. However, the fitting claw body 40 is actually fitted in the cross groove 47 in the solid line direction. With the rotation maintained, the drive shaft 46 is rotated to the right.
In this way, the first shutter 34a moves in the left direction integrally with the first slider 35a as the fitting claw body 40 moves, and the second shutter 34b moves in the right direction integrally with the second slider 35b. Open with double doors.

When the fitting claw body 40 of the first slider 35a moves to the reverse groove portion 48 at the left end of the cross groove 47, the shutter first shutter 34a is completely opened as shown in FIG. At this time, the shutter second shutter 34b similarly moves in the right direction and is completely opened.
As the shutter 34 is opened, the slurry batch in the stirring vessel 21 gradually falls from the discharge port 33 to the secondary vessel 53 due to its own weight and stirring of the inner blade 31 and the outer blade 32.
When the shutter 34 is completely opened and the slurry batch is completely dropped, the drive shaft 46 is rotated in the same direction as when the shutter 34 is opened. Then, the direction of the fitting claw body 40 of the swinging piece 38 is changed by the reversing groove 48, and the first slider 35a moves in the solid line direction in FIG. 7 and the second slider 35b moves in the dotted line direction in FIG. When each fitting claw body 40 reaches the reversal groove portion 48 of the cross groove 47, the first shutter 34a and the second shutter 34b are in close contact with each other and the shutter 34 is closed.
As described above, the shutter 34 opens and closes when the drive shaft 46 rotates in the same direction.

  In the embodiment shown in FIGS. 1 and 3, the shutter 34 is double-opened, but it may be single-opened.

In the first embodiment, the shutter 34 and the slider 35 are integrally connected so as to open and close while sliding in the horizontal direction. However, as shown in FIG. You can also.
In the example shown in FIG. 10, a rack 55 (first rack 55a and second rack 55b) is connected to the slider 35 (first slider 35a and second slider 35b), and the shutter 34 (first shutter 34a and second shutter 35b). 34b) and the pinion 56 (the first pinion 56a and the second pinion 56b) are connected to engage the rack 55 (the first rack 55a and the second rack 55b) and the pinion 56 (the first pinion 56a and the second pinion 56b). When combined, the horizontal movement of the slider 35 (first slider 35a and second slider 35b) is performed via the rack 55 (first rack 55a and second rack 55b) and pinion 56 (first pinion 56a and second pinion 56b). The shutter 34 (the first shutter 34a and the second shutter 34b) can be rotated. By making such a double-sided opening, the shutter 34 (the first shutter 34a and the second shutter 34b) can be made smoother by the load of the slurry batch applied to the shutter 34 (the first shutter 34a and the second shutter 34b), and It can be opened in a short time and the slurry batch can be discharged.
When closing, the slider 35 (the first slider 35a and the second slider 35b) is unloaded and can be easily closed.

  In Examples 1 and 2, the contents in the stirring vessel 21 are slurry batches, but are not limited thereto, and may be liquids or other fluids. If the contents in the stirring vessel 21 are a fluid, the present invention may be a case where the discharge port 33 is provided in the side wall 22 of the stirring vessel 21.

In the embodiment shown in FIGS. 1 and 3, one discharge port 33 is used. However, as shown in FIG. 11, a plurality of discharge ports 33 may be opened and closed by respective shutters 34.
FIG. 11A shows an example in which a plurality of outlets 33 are simultaneously opened and closed by respective one-side shutters 34. FIG. 11B shows an example in which a plurality of discharge ports 33 are simultaneously opened and closed by respective double-open shutters 34a and 34b.

  DESCRIPTION OF SYMBOLS 10 ... Mixing container, 11 ... Cement supply port, 12 ... Water supply port, 13 ... Drive shaft, 14 ... Drive mechanism, 15 ... Stirrer blade, 16 ... Discharge port, 17 ... Pump, 18 ... Discharge valve, 19 ... Mixer Car, 20 ... delivery pipe, 21 ... stirring vessel, 22 ... side wall, 23 ... bottom, 24 ... lid, 25 ... cement supply port, 26 ... bentonite supply port, 27 ... water supply port, 28 ... middle shaft, 29 ... outside Shaft, 30 ... gear, 31 ... inner blade, 32 ... outer blade, 33 ... discharge port, 34 ... shutter, 35 ... slider, 36 ... drive shaft hole, 37 ... guide shaft hole, 38 ... swing piece, 39 ... piece Holding body, 40 ... fitting claw body, 41 ... swing groove, 42 ... projection, 43 ... swing shaft body, 44 ... engagement hole, 45 ... fixing screw, 46 ... drive shaft, 47 ... cross groove, 48 ... reversing groove, 49 ... motor, 50 ... timing belt, 51 ... rail 52 ... movable roller, 53 ... second vessel, 54 ... guide shaft, 55 ... rack 56 ... pinion 57 ... stepped hole.

Claims (5)

In a shutter opening and closing device for opening and closing a container provided in the container by opening and closing a shutter provided at the container outlet,
A slider is provided on the shutter, a drive shaft is passed through the drive shaft hole of the slider, a predetermined length of crossing spiral grooves are formed on the outer periphery of the drive shaft, and the cross is formed at both ends of the cross groove. A reversing groove continuous with the groove is provided, and a fitting claw body of a swinging piece provided on the slider is loosely fitted into the cross groove, and the slider is reciprocated by rotation in one direction of the drive shaft. Shutter opening and closing device.   2. The shutter opening / closing device according to claim 1, wherein a shutter is directly connected to the slider, and the shutter is slid along the discharge port by reciprocation of the slider.   The drive shaft is provided with two cross grooves of a predetermined length, the fitting claws of each slider are loosely fitted in the respective cross grooves, and the shutter directly connected to each slider is double-opened. Item 3. The shutter opening and closing device according to Item 1 or 2.   4. The shutter opening and closing device according to claim 1, wherein the fitting claw has an elongated shape that goes straight at the crossing position of the cross groove and changes its direction at the reversing groove.   A shutter opening and closing device characterized in that a rack provided on a slider and a pinion provided on a shutter are engaged with each other, and the shutter is opened and closed by a reciprocating movement of the slider.

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