JP2006118456A - Linear squeeze type force-feed device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear squeeze type force-feed device requiring less tube arrangement space, capable of coping with a variation in flow resistance of various fluids, enabling the extension of the service life of a tube, having reduced size, simplified structure, and excellent fluid force-feeding power. <P>SOLUTION: This linear squeeze type force-feed device 1 comprises a pair of holdingly pressing means 9 disposed on both sides of the tube 7 and holdingly pressing the tube 7, a pair of carrying means 11 holding the pair of holdingly pressing means 9 and carrying them on a loop rail 13, and a drive means 15 driving the pair of carrying means 11 in synchronism with each other in a force-feed direction. A linear carrying part 31 linearly moving the holdingly pressing means 9 along the tube 7 is installed on the loop rail 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a squeeze-type pressure feeding device that conveys a fluid such as earth and sand supplied into a tube from the outside of the tube, and particularly in a state where the tube is linearly extended without bending the tube. The present invention relates to a linear squeeze type pumping device that can pump a fluid.

  Conventionally, a squeeze-type pumping device has been used as a means for transporting fluids such as ready-mixed concrete and earth and sand. Specifically, as shown in FIG. 11, the pumping tube 101 that conveys the fluid R is bent in a U shape along the drum 102, and the pumping tube 101 is pushed by a pumping roller 103 provided inside the bent portion. A squeeze type pressure feed pump 100 is used in which the pumping tube 101 is handled by the swirling movement while being crushed and the fluid R is pushed out.

  However, in such a squeeze type pressure feed pump 100, since the pumping tube 101 is bent in a U shape and used, the problem that the life of the pumping tube 101 is shortened has been pointed out. Further, when the pumping tube 101 is bent in a U shape, the space for disposing the pumping tube 101 increases. Therefore, if the length of the pumping tube 101 is increased, the number of the bent portions is increased, so that a huge arrangement space is required.

  Further, in the squeeze type pressure pump 100 shown in FIG. 11, the pumping roller 103 is swung on a circular orbit. Therefore, if an attempt is made to increase the transport amount of the fluid R, There is a problem that the squeeze-type pressure feed pump 100 is increased in size because a large turning radius is required. Further, since the pumping roller 103 is provided with a turning radius fixed with respect to the rotor 104, when the foreign matter is mixed in the pumping tube 101 or earth or sand having a large particle size is included, the flow resistance increases. In some cases, the smooth rotation of the pumping roller 103 is hindered.

  Further, instead of the method of bending the pumping tube 101 into a U-shape as described above, a squeeze type pump that can pump the fluid R in a state where the pumping tube 101 is linearly expanded has been developed. (See Patent Document 1 below). However, even in this method, if the conveyance amount of the fluid R is increased, the size of the apparatus is increased, and the swirling trajectory of the pumping roller 103 is strictly regulated by the guide rail, so that the flow resistance of the fluid R is reduced. When it becomes large, the case where the turning of the smooth pumping roller 103 is prevented may occur.

  Furthermore, in common with these two conventional systems, the drum 102 or the seat provided at the position facing the pumping roller 103 is provided in a fixed state and acts as a wall surface. The movement due to the pulsation of 101 is in frictional contact. Therefore, the pumping tube 101 is worn by the frictional resistance received from the drum 102 and the seat, and the service life is shortened.

Japanese Patent Laid-Open No. 9-256958

  The present invention has been made in view of the existence of such background technology and the problems of the background technology, and it is possible to reduce the space for disposing the tubes and to change various fluids, fluid flow resistance, etc. It is an object of the present invention to provide a useful linear squeeze-type pumping device that can cope with the above-mentioned problem and that can extend the life of the tube, is small and simple, and is excellent in the pumping force of a fluid.

  In order to solve the above-mentioned problem, the linear squeeze type pressure feeding device according to the first aspect of the present invention is a squeeze type pressure feeding device that conveys a fluid such as earth and sand supplied into the tube from the outside of the tube. The pressure feeding device is disposed at a position opposed to each other with the tube interposed therebetween, and holds each of the pair of clamping means for clamping the tube and the pair of clamping means individually, and the clamping means is placed on the loop track. A pair of conveying means for applying a feeding force by conveying, and a driving means for driving each of the pair of conveying means in a pressure-feeding direction in synchronization with each other. A linear conveyance unit that linearly moves along the tube is provided.

  According to the first aspect of the present invention, since the fluid can be pumped in a state where the tube is linearly stretched without being bent, the space for disposing the tube can be reduced and the life of the tube can be extended. Further, since the tube is clamped by the pair of clamping means and the fluid in the tube is pumped while being handled in the linear transport section, the transport amount of the fluid can be increased, and the pumping force of the fluid is improved. Further, since the frictional resistance applied to the tube surface by the pinching means is reduced, wear of the tube surface and surface due to the friction is also prevented.

In the linear squeeze type pressure feeding device according to the second aspect of the present invention, in the first aspect, the pinching means is constituted by a pinching roller attached to the transport means so as to freely rotate. It is characterized by.
According to the second aspect of the present invention, since the frictional resistance applied to the tube surface by the pinching means generated at the start of pinching of the tube, at the time of the pinching movement, at the time of separation, etc. is reduced, the tube surface is worn by the friction. Is prevented.

The linear squeeze type pumping device according to a third aspect of the present invention is the first or second aspect, wherein the clamping means adjusts the clamping pressure in accordance with a change in the flow resistance or the like of the fluid flowing in the tube. It is characterized by being provided.
According to the third aspect of the present invention, even if foreign matter is mixed in the tube or the flow resistance is increased due to inclusion of earth or sand having a large particle size, the pinching pressure of the pinching means is appropriately adjusted. Smooth movement of the clamping means in the pumping direction is ensured.

The linear squeeze type pressure feeding device according to a fourth aspect of the present invention is the third aspect, wherein the adjustment of the pinching pressure by the pinching means is performed by forming the conveying means by a chain conveyor. It is characterized by using.
According to the fourth aspect of the present invention, when the flow resistance that prevents the pinching of the pinching means is generated, the chain is bent, so that the pinching means moves in a direction away from the tube. Smooth pumping can be maintained. Further, by using the bending of the chain, the adjustment of the clamping pressure by the clamping means can be easily performed with a simple configuration.

A linear squeeze type pressure feeding device according to a fifth aspect of the present invention is the linear squeeze type pressure feeding device according to any one of the first to fifth aspects, wherein a plurality of the clamping means are arranged at equal intervals on a loop track in the conveying means. It is characterized by that.
According to the fifth aspect of the present invention, the movement resistance of the fluid applied to the individual clamping means is reduced, and the pumping efficiency of the fluid is improved.

In the linear squeeze-type pumping device according to the sixth aspect of the present invention, in any one of the first to sixth aspects, the loop track in the conveying means is formed in an oval shape along the longitudinal direction of the tube. It is characterized by being.
According to the 6th aspect of this invention, since the linear conveyance part provided on the loop track | orbit in a conveyance means can be set long, the pumping stroke of a fluid becomes long and the pumping force of a fluid becomes large.

  According to the present invention, since the fluid can be pumped in a state where the tube is linearly stretched, the space for disposing the tube can be reduced, and the life of the tube can be extended. Further, by making it possible to adjust the clamping pressure of the clamping means, it is possible to cope with various fluids, changes in the flow resistance of the fluid, and the like.

  Hereinafter, the linear squeeze type pressure feeding device according to the present invention will be described with reference to the following examples. In addition, in the following description, the case where the earth and sand R as a fluid excavated by an excavating machine such as a shield machine as shown in FIG. FIG. 1 is a side sectional view showing a use state of a linear squeeze type pressure feeding device. FIG. 2 is a side sectional view showing the linear squeeze type pumping apparatus at the start of clamping, and FIG. 3 is a side sectional view showing the linear squeeze type pumping apparatus at the time of clamping. FIG. 4 is a cross-sectional view showing a state broken along line AA in FIG.

[Example]
The linear squeeze type pressure feeding device 1 is provided at an appropriate position of a tube 7 attached to the rear of the screw conveyor 5 provided at the rear of the shield machine 3. In general, the squeeze-type pumping device is used for transporting ready-mixed concrete or the like, and is also referred to as a “tube pump” in which the ready-mixed concrete supplied into the tube 7 is transported while being handled from the outside of the tube 7. It is a pumping device. In the present invention, the stretched state of the tube 7 is maintained, and the pair of clamping rollers 9 as the clamping means is linearly moved by clamping, and the tube 7 is moved from both sides in the pressure feeding direction so as to sandwich the tube 7. This is characterized in that the nipping roller 9 is acted.

  Specifically, the linear squeeze type pressure feeding device 1 is disposed at a position facing each other with the tube 7 interposed therebetween, a pair of pressure rollers 9 that abut against the tube 7 and clamp the linear tube 7, and a pair of pressure rollers A pair of chain conveyors 11 serving as conveying means for holding a pressure feeding force by holding each of the belts 9 individually and conveying the pinching rollers 9 onto the loop track 13 and the pair of chain conveyors 11 are synchronized for pressure feeding. And a drive motor 15 as drive means for driving in the direction.

  The tube 7 is a relatively soft tubular member formed of a material having flexibility and mechanical strength suitable for transporting the earth and sand R as a fluid, such as synthetic rubber. A pair of the pressing rollers 9 are provided on the upper and lower sides of the tube 7 so that the upper pressing roller 17 is positioned above and the lower pressing roller 19 is positioned below. And the clamping roller 9 comprised by the upper clamping roller 17 and the lower clamping roller 19 is a pair of upper rotating shafts 23 and 23 provided so that it may protrude in the horizontal direction from the flame | frame 21, and It is supported horizontally by each chain 29 spanned between a pair of lower rotary shafts 25 and 25 so as to be freely rotatable.

  Further, as shown in FIG. 4, two sprockets 27 are provided on the rotary shafts 23 and 25 so as to sandwich the upper and lower pressure rollers 17 and 19 from the left and right. Two sets of sprockets 27 are provided so as to be separated from each other along the longitudinal direction of the tube 7, and a chain 29 is wound between the two sets of sprockets 27. The chain 29 is provided with three pairs of pinching rollers 9 at equal intervals, and these three pairs of pinching rollers 9 are in contact with the tube 7 in order and moved by pinching, so that the earth and sand in the tube 7 are transferred. R and the like are pumped.

  The chain conveyor 11 includes the rotary shafts 23 and 25, two right and left, two sets of four sprockets 27, and two chains 29 wound between the sprockets 27. The loop track 13 formed by the chain 29 in the chain conveyor 11 has an oval shape as an example, and the straight part on the tube 7 side linearly moves the pinching roller 9 along the tube 7. It is a transport unit 31.

  The chain 29 is tension adjusted so that the pinching roller 9 can move within a predetermined range in accordance with changes in the flow resistance of the earth and sand R. Therefore, when foreign matter G or the like is mixed in the tube 7 or earth and sand R having a large particle diameter is supplied, the chain 29 is bent and deformed in a direction away from the tube 7, so that the pinching roller 9 is Move in the same direction to slightly reduce the clamping pressure.

  As shown in FIG. 4, the drive motor 15 has an output shaft connected in series to an upper rotary shaft 23 to which the upper pressing roller 17 is attached. The rotation of the output shaft of the drive motor 15 is also transmitted to the lower rotary shaft 25 through appropriate drive transmission means (not shown). The two rotating shafts 23 and 25 are synchronized so as to rotate at the same speed and at the same timing in opposite directions along the pressure feeding direction of the earth and sand R. Note that when the tube 7 is sandwiched and a part of the lower clamping roller 19 is in contact with a part of the upper clamping roller 17 and is driven to rotate, the drive transmission means can be omitted.

  Next, an operation mode of the linear squeeze type pressure feeding device 1 of the present invention configured as described above will be described. The earth and sand R excavated by the excavating machine such as the shield machine 3 is conveyed obliquely toward the rear upper portion by the screw conveyor 5 and supplied into the tube 7. The earth and sand R supplied into the tube 7 is pinched by the pinching roller 9 held by the chain 29 in the chain conveyor 11 provided above and below the tube 7 as shown in FIG. The pressure roller 9 is pressure-feeded rearward so as to be handled by the linear movement of the nipping roller 9 (see FIG. 3).

  When the chain conveyor 11 rotates at a predetermined number of rotations, the second pair of pressing rollers 9 come into contact with the tube 7 and the subsequent earth and sand R are similarly sent backward by the same action as described above. In the same manner, the third pair of pressure rollers 9, the first pair of pressure rollers 9, and the second pair of pressure rollers 9 are in contact with the tube 7 in this order, and the subsequent earth and sand R are directed backward one after another. To pump.

  Further, when the excavated earth and sand R includes foreign matter G such as a large lump of stone or the earth and sand R having a large particle diameter is included, the chain 29 is bent in the direction away from the tube 7 and the upper clamping pressure The roller 17 moves upward and the lower pinching roller 19 moves downward to weaken the pinching pressure of the pinching roller 9. Therefore, the earth and sand R in the tube 7 is smoothly pumped without being hindered by the pinching roller 9.

[Other embodiments]
The linear squeeze-type pumping device 1 according to the present invention is based on the above-described configuration, but it is needless to say that the partial configuration may be changed or omitted without departing from the gist of the present invention. Is possible. For example, the clamping means is not limited to the rolling contact with the tube 7 like the clamping roller 9 but may be a clamping pad 33 that makes sliding contact as shown in FIG. Further, the conveying means is not limited to the chain conveyor 11, and may be a conveying means having other configurations such as a belt drive type conveying means in which a V belt is wound between pulleys.

  Further, the loop track 13 in the conveying means is not limited to an oval shape, but may be another shape such as a rectangular shape or an oval shape. In addition, the linear conveyance unit 31 on the loop track 13 does not need to be on a straight line when strictly interpreted, and includes a somewhat curved shape such as an arc shape having a large curvature radius. This is what is used in the book.

  Moreover, as shown in FIG. 6, it is also possible to provide a guide rail 35 or the like that strictly regulates the loop track 13 in the conveying means. In that case, the clamping means is attached via an urging means such as the compression coil spring 37 as shown in the figure, and the compression coil spring 37 is compressed and deformed in accordance with changes in the flow resistance of the earth and sand R, so that the clamping means is clamped. It is also possible to adjust the pressure.

  In addition, as shown in FIG. 7, a guide rail 35 can be provided in order to stabilize the movement of the pinching roller 9 in the linear conveyance unit 31. In the illustrated embodiment, the guide rail 35 is provided so as to be supported by the compression coil spring 37, and the compression coil spring 37 is compressed and deformed in accordance with changes in the flow resistance of the earth and sand R, and the upper and lower guide rails 35 are The interval is automatically adjusted.

  Furthermore, it is also possible to employ the linear squeeze type pumping device 1 having a structure as shown in FIGS. In this embodiment, as in the embodiment shown in FIG. 7, a guide rail 35 is provided in order to stabilize the movement of the pinching roller 9 in the linear conveyance section 31. However, only the upper guide rail 35 is supported by the compression coil spring 37 and is provided in a movable state, whereas the lower guide rail 35 is provided in a fixed state. .

  Hereinafter, the guide rail 35 provided in the movable state is defined as a movable guide rail 35A, and the guide rail 35 provided in the fixed state is defined as a fixed guide rail 35B. The structure will be described. In this embodiment, a pinching roller 9 having a bowl shape whose central diameter is somewhat larger than the diameters at both ends is used. The pinching roller 9 is attached to a horizontal rod 41 passing through the center of the pinching roller 9 via a bearing 39 so as to be freely rotatable. A guide roller 43 is attached to both ends of the pinching roller 9 through a bearing 45 so as to be freely rotatable with respect to the horizontal rod 41. Further, a connection fitting 47 for connecting to the chain 29 is attached to the outside of the guide roller 43 and near the both ends of the horizontal rod 41, and the pinching roller 9 is wound between the sprockets 27 through the connection fitting 47. It can move on the loop track 13 of the chain 29 being rotated.

  The lower pinching roller 9 is supported by the fixed guide rail 35B laid on the upper surface of the fixed frame 49B through the guide roller 43 so that the lower pressing roller 9 cannot move downward. In this sense, the lower pressure roller 9 is hereinafter referred to as a fixed roller 9B. On the other hand, the upper nipping roller 9 seems to be restricted from moving upward through the guide roller 43 by the movable guide rail 35A attached to the lower surface of the movable frame 49A. It is possible to move upward along with the upward movement of. In this sense, the upper nipping roller 9 is hereinafter referred to as a movable roller 9A.

  That is, the fixed frame body 49B is provided in a fixed state so as to be horizontally bridged between the opposing side plates at the inner side in the width direction below the frame 21, and the fixed guide rail 35B provided on the upper surface of the fixed frame body 49B. Thus, both guide rollers 43 of the fixed roller 9B are supported in a freely rolling manner in such a manner that downward movement is prevented. On the other hand, the movable frame body 49 </ b> A is provided in a movable state using a support bracket 51 that protrudes outward in the width direction of the upper portion of the frame 21. Specifically, the support bracket 51 is provided with support rods 53 extending downward in the vertical direction, and sliding sleeves 55 provided at both ends of the movable frame body 49A are slidable with respect to the support rods 53. The movable frame 49A can be moved up and down by being externally fitted. A compression coil spring 37 that is externally fitted to the support rod 53 is provided between the support bracket 51 and the sliding sleeve 55.

  In the case of this embodiment, instead of directly transmitting the rotation of the drive motor 15 to the sprocket 27, a drive transmission means is interposed, and a chain drive mechanism 59 using a separate chain 57 as the drive transmission means is provided. Adopted. As shown in FIG. 8, the chain drive mechanism 59 includes a drive sprocket 61 attached to the output shaft of the drive motor 15, two relay sprockets 63 and 65, and two upper and lower sprockets positioned downstream in the transport direction. 27, two driven sprockets 67 and 69 provided at the ends of the rotary shafts 23 and 25, and the chain 57 wound between these sprockets 61, 63, 65, 67 and 69. Yes. Note that the winding direction of the chain 57 is changed to the inner side at the portion wound around the driven sprocket 67. However, as described above, this means that the rotating shafts 23 and 25 are moved in the opposite directions at the same speed and at the same timing. This is a configuration for synchronous rotation.

  In the present invention, when the earth and sand excavated at a construction site such as a tunnel is to be transported and discharged to the outside, more specifically, the tube installation space can be reduced, the tube life can be extended, and This can be used when it is desired to efficiently pump the fluid without being affected by the flow resistance of the animal.

It is a sectional side view which shows the use condition of a linear squeeze type pumping apparatus. It is a sectional side view which shows the linear squeeze type pumping apparatus at the time of a clamping start. It is a sectional side view which shows the linear squeeze type pumping apparatus at the time of pinching movement. It is sectional drawing which shows the state fractured | ruptured by the AA line in FIG. It is a sectional side view which shows two other examples of a linear squeeze type pumping apparatus. It is a sectional side view which shows other Example as same as the above. It is a sectional side view which shows other Example as same as the above. It is a sectional side view which shows other Example as same as the above. It is sectional drawing which shows the state fractured | ruptured by the BB line in FIG. It is sectional drawing which shows the state fractured | ruptured by the CC line in FIG. It is side sectional drawing which shows the conventional squeeze type pumping apparatus.

Explanation of symbols

1 Linear squeeze type pumping device, 3 shield machine, 5 screw conveyor,
7 Tube, 9 Clamping roller (Clamping means), 9A Movable roller, 9B Fixed roller,
11 Chain conveyor (conveying means), 13 loop track, 15 drive motor (driving means),
17 Upper clamping roller, 19 Lower clamping roller, 21 frame, 23 Rotating shaft (upper),
25 Rotating shaft (downward), 27 Sprocket, 29 Chain, 31 Linear conveying part,
33 clamping pad, 35 guide rail, 35A movable guide rail,
35B fixed guide rail, 37 compression coil spring (biasing means), 39 bearing,
41 Horizontal rod, 43 Guide roller, 45 Bearing, 47 Connecting bracket,
49A movable frame, 49B fixed frame, 51 support bracket, 53 support rod,
55 sliding sleeve, 57 chain, 59 chain drive mechanism,
61 Drive sprocket, 63 Relay sprocket, 65 Relay sprocket,
67 driven sprocket, 69 driven sprocket, R earth and sand (fluid), G foreign matter

Claims (6)

A squeeze type pressure feeding device that conveys fluid such as earth and sand supplied into the tube from outside the tube,
The pressure feeding device is disposed at a position facing each other across the tube, and holds each of the pair of clamping means and the pair of clamping means for clamping the tube, and transports the clamping means on the loop track. A pair of conveying means for applying a pressure feeding force, and a driving means for driving each of the pair of conveying means in a pressure feeding direction in synchronization with each other. A linear squeeze-type pressure feeding device, characterized in that a linear conveyance unit that moves linearly along the linear squeeze unit is provided.   2. The linear squeeze type pressure feeding device according to claim 1, wherein the pinching means is constituted by a pinching roller attached to the transport means so as to be freely rotatable.   3. The linear squeeze type pressure feeding device according to claim 1, wherein the pinching means is provided so as to be able to adjust the pinching pressure in accordance with a change in flow resistance or the like of a fluid flowing in the tube.   4. The linear squeeze type pressure feeding device according to claim 3, wherein the adjustment of the pinching pressure by the pinching means uses the bending of the chain produced by forming the conveying means by a chain conveyor.   5. The linear squeeze type pressure feeding device according to claim 1, wherein a plurality of the clamping means are arranged at equal intervals on a loop track in the conveying means.   6. The linear squeeze type pumping device according to claim 1, wherein the loop track in the conveying means is formed in an oval shape along a longitudinal direction of the tube.

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