JPH0730739B2 - Transport tube movement prevention device in squeeze pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for preventing movement of a transfer tube in a squeeze pump.

(Prior Art) In the squeeze pumps shown in FIGS. 5 and 6, a plurality of pairs of pinching rollers 50 revolving while freely rotating are used to press the elastic tubes 51 arranged in an arc shape from both sides thereof. , Elastic tube 51
The slurry inside is sucked and discharged.

In this squeeze pump, when the roller 50 separates from the elastic tube 51, the roller 50 separates while pulling the elastic tube 51 in the revolving direction of the roller 50. Therefore, when the roller 50 completely separates, the elastic tube 51 reacts to the pump case 52 side. The elastic tube 51 was strongly impacted. Therefore, when the position of the elastic tube 52 is not stable and the roller 50 presses the elastic tube 51 again, there is a problem that the proper position cannot be pressed and the slurry transfer efficiency is reduced.

Therefore, the applicant of the present invention has proposed to solve the above-mentioned problems.
No. 58-158389 discloses a squeeze pump as shown in FIG.

This squeeze pump has a horseshoe-shaped restricting member along an elastic tube 51 arranged in an arc shape inside a pump case 52.
54 is provided, and the restriction member 54 restricts the elastic tube 51 from moving toward the center of the pump case 52 and being pulled in the revolving direction of the roller 50 near the position where the roller 50 ends the pressing. However, this regulating member 54
Is provided along the entire elastic tube 51 in the pump case 52, which causes a problem of large scale and high manufacturing cost. Further, since the restricting member 54 has a horseshoe shape, the elastic tube 51 extends from the position where it is clamped by the roller 50 located on the lower side in FIG. 7 to the vicinity of the position where the clamping by the roller 50 ends. There is also a problem that the peripheral side portion is strongly pressed against the outer surface of the regulation member 54 as the roller 59 revolves, which causes the tube surface to be worn and damaged early.

(Problems to be Solved by the Invention) As described above, the present invention not only solves the problems that the position of the elastic tube is not stable but the transport efficiency of slurry and the like is lowered, and the manufacturing cost is increased. However, the present invention intends to solve all of the problems that the elastic tube is worn and damaged in an early stage by the restricting member adopted to solve these problems.

Configuration of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention has an introduction hole 8
A plurality of pairs of pinching rollers 22 that revolve while revolving are provided in the casing 6 having the guide hole 9 and the elastic tube 16 introduced from the introducing hole 8 along the revolution locus of the pinching roller 22. On the other hand, in the squeeze pump in which the tip end of the elastic tube 16 is led out of the casing 6 through the outlet hole 9 so that the pinching roller 22 rolls and presses the elastic tube 16 from both side surfaces. A movement restricting member 12 is provided at a position S corresponding to the revolving direction of the pressure roller 22 in the peripheral portion of the guide hole 9 of the casing 6 so as to project into the casing 6, and the tip portion thereof is a pressure roller for the elastic tube 16. While extending to near the clamping end position by 22,
A support surface (14a) is provided at the tip end thereof, which is inclined in a direction along the bulge generated on the inner peripheral side of the elastic tube (16) when it is pressed by the pressing roller (22).

(Operation) That is, the elastic tube contacts the support surface of the movement restricting member at the position where the pressing pressure of the pressing roller ends, and the movement of the pressing roller in the revolving direction is restricted.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS.

In FIG. 1, reference numeral 1 indicates a squeeze pump, which is fixedly mounted on a pump car 2. Reference numeral 3 is a hopper of the squeeze pump 1, and 4 is a water tank for cleaning provided on the pump wheel 2 in front of the squeeze pump 1. 5
Is a boom mounted on the column 5a in the front part of the pump car 2 and can be folded in three stages.

The configuration of the squeeze pump 1 will be described below. Reference numeral 6 denotes a horizontally-arranged planar casing, and a motor 7 is fixedly mounted on the upper surface of the casing via a speed reducer D.
The rotation shaft of the motor 7 is connected to the speed reducer D, and the rotation shaft R extending downward from the speed reducer D has a casing 6.
Penetrates through the center of. As shown in FIG. 2, reference numerals 8 and 9 denote an introduction hole and an extraction hole, respectively, which are provided through the arcuate surface of the casing 6, and a slit S extending in a direction toward each other is formed at a part of each peripheral edge. Has been done. Ten
Is a ridge provided on the left half of the arcuate inner peripheral surface of the casing 6, and is located substantially at the center of the casing 6 in the thickness direction as shown in FIG.

Reference numerals 11 and 12 are a pair of movement restricting members fitted in the slits S of the holes 8 and 9, respectively, and one end is fixed to the outer surface of the casing 6 and the other end projects into the casing 6, The end extends to the vicinity of the position where the pressing roller 22 of the elastic tube 16 described later ends the pressing operation. As shown in FIG. 4, the movement restricting members 11 and 12 are composed of a mounting portion 13 positioned horizontally in the slit S and a supporting portion 14 welded and fixed so as to be orthogonal to the left end or the right end of the mounting portion 13. It has a T-shaped cross section. The support portion 14 of each of the movement restricting members 11 and 12 is bent at its tip end portion extending inward of the casing 6 from the outer peripheral edge of the introduction hole 8 or the extraction hole 9,
The support surface 14a is formed so as to be inclined in the direction along the bulge generated on the inner peripheral side of the elastic tube 16 when pressed by the pressing roller 22 (FIG. 2). Reference numeral 15 is a rod-shaped reinforcing member that connects both the movement restricting members 11 and 12 to increase the attachment strength of the both movement restricting members 11 and 12 to the casing 6.

Reference numeral 16 denotes an elastic tube which is introduced into the casing 6 from the introduction hole 8 of the casing 6 and then extends along the ridge 10. The elastic tube 16 is led out of the casing 6 from the lead-out hole 9. Note that the elastic tube 16 is led out of the casing 6 from the lead-out hole 9 of the casing 6 and then led to the tip of the boom 5.

Reference numeral 17 is a rotary plate having an irregular hexagonal shape provided in the central portion of the casing 6, and is adapted to rotate integrally with a rotary shaft R penetrating the central portion. The rotating plate 17
More specifically, the pair of corners A and A'which face each other are connected by straight lines to the adjacent corners B, C and B ', C', respectively, and the corners B and B ', Each of C and C'is connected by a curve slightly curved in the central direction. The intervals between the corners A and B, C and between the corners A ′ and B ′, C ′ are long, and the intervals between the corners B and B ′ and the corners C and C ′ are short. Reference numeral 18 denotes a pair of restoration rollers provided so as to be freely rotatable with respect to the corners A and A'of the rotary plate 17, and revolve around as the rotary plate 17 rotates. Reference numeral 19 also denotes four pressing rollers attached to the corners B, B'and C, C'of the rotary plate 17, and 20 denotes four pairs of rollers mounted between the restoring roller 18 and the pressing 19 on both upper and lower surfaces of the rotary plate 17. Is a guide roller. Incidentally, the pressing roller 19 and the guide roller 20 are designed to freely revolve while revolving in the same manner as the restoring roller 18.

Reference numeral 21 denotes a pair of mounting shafts attached to the upper and lower surfaces of the rotary plate 17 so that the bolts 21a are attached so as to traverse between the double-sided lines of the rotary plate 17. ing. Further, the pinching rollers 22 attached to both ends of the mounting shaft 21 are divided into three parts, an inner part 22a, a central part 22b, and an outer part 22c, and each of them is allowed to rotate at the same time with respect to the mounting shaft 21. ing. The pinching roller 22 revolves while pinching the elastic tube 16, and is formed such that the end portion of the outer portion 22c on the side of the central portion 22b and the central portion 22b have a large diameter. In addition, as shown in FIG.
22 is arranged such that the base end portion of the inner portion 22a thereof is located between the pair of pressing rollers 19.

Here, the restoration roller 18, the pressing roller 19, the guide roller
20, the orbital trajectory of the pinching roller 22 will be described. The restoring roller 18 revolves in a state of being in contact with the inner outer wall of the elastic tube 16 having an arc shape, and the pressing roller 19 revolves slightly on the center side of the restoring roller 18. The guide roller 20 and the pinching roller 22 revolve on the side surface of the elastic tube 16.

Now, the operation of the transport tube movement preventing device configured as described above will be described. The slurry charged from the hopper 3 of the squeeze pump 1 is continuously fed into the elastic tube 16. On the other hand, the rotation axis R rotated by the motor 7
Rotates the rotary plate 17 in the casing 6, and along with this, the restoration roller 18, the pressing roller 19, and the guide roller.
20. Rotate the pinching roller 22 clockwise. As described above, since the pair of pinching rollers 22 revolve around the elastic tube 16 while being pinched, the slurry in the elastic tube 16 is guided by the pinching roller 22 from the introduction hole 8 side of the casing 6 to the outlet hole 9. It is forcibly transported to the side.

By the way, the pinching roller 22 uses the elastic tube 16 as a roller.
Since it revolves while pulling in the revolving direction of 22, the force in the revolving direction of the roller 22 is applied to the elastic tube 16 at a position near the lead-out hole 9.

However, since the movement restricting member 12 is provided in the casing 6 from the peripheral portion of the lead-out hole 9 in correspondence with the direction of this force, the elastic restricting tube 16 is positioned by the movement restricting member 12 in the roller revolving direction. It is possible to prevent the shift and the reaction thereof from colliding with the inner peripheral wall of the casing 6. Therefore, it is possible to maintain the transport function of the elastic tube 16 for a long period of time without being stretched by applying an unreasonable force when the position is displaced or damaged by the impact force at the time of collision.

Further, since the movement restricting member 12 only slightly protrudes from the peripheral edge of the outlet hole 9 into the casing 6, unlike the case of the conventional restricting member 54 having a horseshoe shape, the manufacturing cost can be reduced.

Moreover, the support surface 14 provided at the tip of the movement restricting member 12
Since a is inclined in the direction along the bulge generated in the elastic tube 16 when pressed by the pressing roller 22 as described above, unlike the conventional case where the horseshoe-shaped restricting member 54 is used, its supporting surface 14a and There is almost no possibility that the inner peripheral surface of the elastic tube 16 will be deteriorated due to abrasion damage due to the contact of.

On the other hand, the pinching roller 22 is
Is applied in the revolving direction, the movement of the elastic tube 16 is restricted by the inner peripheral wall of the casing 6 in this case.

Further, as shown in FIG. 3, the elastic tube is further added.
16 is closed when pinched by the pinching roller 22,
Pressing rollers 19 provided in front of and behind the pressing roller 22 press the front and rear of the closed portion of the elastic tube 16 from the central direction to open the elastic tube 16 largely. Therefore, aggregates such as pebbles mixed in the slurry can escape from the closed portion of the elastic tube 16 in the front-rear direction, and deterioration of the inner peripheral surface of the elastic tube 16 is reduced.

When the pressing rollers 22 press the elastic tubes 16, strong pressure is applied to both side surfaces of the elastic tubes 16 to deform the elastic tubes 16 into a flat shape.
The pair of guide rollers (20) presses both side surfaces of the elastic tube (16) to deform the elastic tube (16) into a slightly flat shape in advance. Therefore, the elastic tube 16 is gradually deformed without being applied with a large pressure at once. Therefore, the elastic tube 16 does not deteriorate and burst due to the pressure applied during pinching.

Elastic tube deformed into a flat shape after passing through the nip roller 22
The pressing roller 19 following the pinching roller 22 presses 16 from the center, and the restoring roller 18 presses it again from the center. Therefore, the elastic tube 16 is restored to have an annular cross section, and the slurry is efficiently transported.

Since the restoring roller 18, the pressing roller 19, the guide roller 20, and the pressing roller 22 are all configured to be idle, they roll on the elastic tube 16. Therefore, wear of the elastic tube 16 can be minimized.

In addition, the pinching roller 22 is provided with an inner portion 22a, a central portion 22b, and an outer portion 22a.
Since it is divided into three parts of c and each rolls independently on the elastic tube 16, there is a difference in the peripheral speed of the pressure roller 22 and the pressure roller 22 slips on the elastic tube 16. There is no.

Effects of the Invention As described above in detail, according to the present invention, even when the pressing force of the pressing roller against the elastic tube in the casing is completed, the roller tries to move the elastic tube by pulling the elastic tube in the roller revolving direction. Since the movement restricting member regulates the movement and stabilizes the position of the elastic tube in the vicinity of the clamping pressure end position, the elastic tube is prevented from unnecessarily expanding or colliding with the casing inner peripheral wall and being damaged. it can. Further, since the movement restricting member is formed so as to slightly project from the peripheral portion of the lead-out hole into the casing, the manufacturing cost of the entire apparatus can be reduced. Further, since the tip of the movement restricting member is provided with a supporting surface inclined in the direction along the bulge generated in the elastic tube when pressed by the pressing roller, the supporting surface is supported by the pulling force in the roller revolving direction. Even when the elastic tube comes into contact with the surface, there is almost no risk of wear and damage to the inner peripheral surface of the elastic tube, and there is an excellent effect that the elastic tube can be less likely to deteriorate as compared with the conventional horseshoe-shaped restricting member.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view embodying the present invention, FIG. 2 is a plan sectional view thereof, FIG. 3 is a front sectional view taken along line III-III of FIG. 2, and FIG. 5 and 6 are a front sectional view and a side sectional view showing the prior art, respectively.
The figure is a front sectional view showing another conventional technique. Casing 6, introduction hole 8, derivation hole 9, movement restricting members 11,1
2, support surface 14a, elastic tube 16, pinching roller 22.

Claims (1)

[Claims] 1. A plurality of pairs of pinching rollers (22) revolving while revolving are provided in a casing (6) having an introduction hole (8) and a discharge hole (9), and the introduction hole (8) is provided. While the elastic tube (16) introduced from (1) is arranged along the revolving locus of the pressure roller (22), the tip of the elastic tube (16) is moved from the outlet hole (9) to the outside of the casing (6). In a squeeze pump that is drawn out and the pressing roller (22) rolls and presses the elastic tube (16) from both sides, a pressing roller (22) is provided at the peripheral portion of the guide hole (9) of the casing (6). The movement restricting member (12) is provided so as to project into the casing (6) at a position (S) corresponding to the revolving direction of (22), and the tip portion of the movement restricting member (12) is disposed between the pressure roller (2) of the elastic tube (16).
2) It extends to near the end position of the pinching pressure, and its tip end is tilted in the direction along the bulge generated on the inner peripheral side of the elastic tube (16) when pinched by the pinching roller (22). A device for preventing movement of a transfer tube in a squeeze pump, which is provided with a surface (14a).