JPH055480A - Peristaltic pump - Google Patents

Abstract

PURPOSE:To set up a pump driving mechanism in a place distant from a fluid transfer part of tube or the like by preventing a solid body in fluid from being easily bitten, and quickly and easily removing the solid body after biting. CONSTITUTION:In a volume adjusting means 2, volume of a plurality of flexible extension/contraction pressing units 9, 9... is changed, so that constricted parts A are moved, to press-feed fluid inside by worming an operating member 6. The flexible extension/contraction pressing units 9, 9... are provided with flexibility and also changing the volume by an in-out flow of operating fluid. The flexible extension/contraction pressing units 9, 9... are flexibly deformed relating to a solid body prevented from being easily bitten to easily remove the bitten solid body. When biting is generated, a biting abnormality signal is received by a pressing unit contraction control means to widen a fluid flow path 7 spread by reducing the volume of the flexible extension/contraction pressing units 9, 9....

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peristaltic pump for transporting a fluid by moving a constricted portion formed in a tube and performing a so-called peristaltic operation, and particularly to preventing and trapping solid matter in the fluid. The present invention relates to a peristaltic pump having a recovery measure when an abnormality occurs.

[0002]

2. Description of the Related Art Generally, peristaltic pumps are used for transporting special fluids such as raw concrete slurry, solid-liquid mixture and highly viscous solution. In particular, the drive part of the pump is hygienic because it does not come into contact with fluids, and moreover, it is possible to carry out quantitative transportation with high accuracy, and therefore it is used for the transportation of chemicals that need to be mixed in an accurate ratio.

The basic structure of this peristaltic pump is to press a tube through which a fluid flows from the outside to form a constricted portion, move the pressed portion so as to move the constricted portion in the traveling direction, and It pushes out the fluid.
When the pressure is released, the tube returns to its original shape due to the elastic restoring force of the tube, new fluid flows in, and fluid is transported by the next pressure.

Specifically, in the technique disclosed in Japanese Patent Laid-Open No. 61-268887, a rotor having a roller provided on the outer peripheral portion is housed in a rotor container, and a tube is wound around the rotor so that the outer side is covered. It is fixed and the tube is pressed by the roller to form a constriction in the tube, and the rotor is rotated to revolve the roller to move the constriction and perform the peristaltic motion (hereinafter referred to as the revolving roller type). Peristaltic pump). And, as a drive mechanism for rotating the rotor,
A case accommodating the drive motor is installed adjacent to the rotor container.

As another type of peristaltic pump, the technique disclosed in Japanese Utility Model Laid-Open No. 124284/1990 discloses that the tubes are arranged in a straight line and two rows of crushing pressing bodies are arranged in the longitudinal direction of the tubes. And two right and left rows of the pressing body for return are arranged to perform a peristaltic motion by alternately performing an up and down pressing motion and a left and right pressing motion (hereinafter referred to as a pressing body type peristaltic pump). The drive mechanism includes one drive shaft, a power transmission mechanism that transmits the rotational force of the drive shaft to each pressing body, and the transmitted power is converted into a reciprocating motion by an eccentric cam and transmitted to each pressing body. , A pressing mechanism that causes each pressing body to reciprocate so that the constricted portion moves, and these mechanisms are arranged around the tube.

[0006]

However, in the conventional peristaltic pump, neither the revolving roller type peristaltic pump nor the pressing body type peristaltic pump has a flexible roller or a pressing body for pressing the tube. When the fluid is a solid-liquid mixture, there is a drawback in that the roller or the pressing body tends to bite the solid matter in the fluid across the tube.

Since the tube needs to be removed from the drive source mechanism in order to remove the bitten solid matter, the entire apparatus must be disassembled, and once biting occurs, the operation is restarted. The problem is that it takes a lot of time and effort.

Further, in the revolving roller type peristaltic pump, a case accommodating the drive motor must be installed adjacent to the mechanism forming the constricted portion, and in the peristaltic pump of the pressing body type, the drive mechanism is provided around the tube. Must be provided.
In other words, both types of peristaltic pumps require a large drive mechanism adjacent to a fluid transfer portion such as a tube, which has a drawback that the installation place is restricted.

The present invention has been made in view of the above problems, and makes it difficult for a solid substance in a fluid to be bitten, and the solid substance can be quickly and easily removed after being bitten once. Another object is to allow the pump drive mechanism to be installed at a place apart from a fluid transfer portion such as a tube.

[0010]

In order to achieve the above object, the means taken by the present invention is such that an actuating member (6) is housed in a casing (4) and the actuating member (6) is always flexible. The flexible expansion / contraction member is made to follow the flexible expansion / contraction member, and the flexible member is expanded / contracted by the volume adjusting means to cause the actuating member (6) to perform a peristaltic motion.

Specifically, in the invention according to claim 1, first, it is housed in the casing (4), and one end of the tubular shape is formed at the inlet (4a) and the other end is formed at the outlet (4b). In addition, an actuating member (6) which is elastically deformable and whose inside is formed in a fluid flow path (7) for the fluid is provided. Further, a plurality of actuating members (6) are arranged in the longitudinal direction of the actuating member (6) in the actuating space (8) formed between the casing (4) and the actuating member (6). Constriction (A)
, And a plurality of flexible expansion / contraction pressure bodies (9), (9) ... With variable volume that expand and contract so as to restore the constricted portion (A) are provided. In addition, the working fluid is supplied to the flexible telescopic pressing bodies (9), (9) ... And the working fluid is supplied to the flexible telescopic pressing bodies (9), (9) ,.
(9) …… Discharge from the constricted part (A) and
The volume adjusting means (2) for changing the volume of each flexible telescopic pressing body (9), (9) ... Is provided so as to move from a) toward the outlet (4b). ..

According to the second aspect of the present invention, first, the casing (4) is housed in the casing (4) so as to form an annular fluid flow passage (7) through which the fluid flows, and the inside is sealed. An elastically deformable actuating member (6) formed in the actuated working space (8) is provided. Further, a plurality of the actuating members (6) are arranged in the actuating space (8) in the longitudinal direction of the actuating member (6) to form a constricted portion (A) and the constricted portion (A) is restored. A plurality of variable volume flexible telescopic pressing bodies (9) that expand and contract to
(9) ... is provided. In addition, the working fluid is supplied to the flexible telescopic pressing bodies (9), (9) ... And the working fluid is supplied to the flexible telescopic pressing bodies (9), (9).
The volume of each flexible telescopic pressing body (9), (9) is discharged so that the constricted part (A) moves from the inflow port (4a) toward the outflow port (4b). The volume adjusting means (2) for changing is provided.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the peristaltic pump described, the flexible telescopic pressing body (9),
In (9) ..., Entrapment abnormality detecting means (31) for detecting that solid matter in the fluid is entrapped across the actuating member (6) is provided. Further, the biting abnormality detecting means (31)
The volume of the flexible expansion / contraction pressing bodies (9), (9) ... or all the flexible expansion / contraction pressing bodies (9), (9) .. The pressing body contraction control means (B) is provided.

[0014]

With the above construction, according to the invention of claim 1, when the volume adjusting means (2) changes the volumes of the plurality of flexible telescopic pressing bodies (9), the flexible telescopic pressing bodies ( 9), (9) ... Inflate and contract, and the constriction (A) is formed and the constriction (A) is restored in the actuating member (6). Then, the volume adjusting means (2) changes the volumes of the plurality of flexible telescopic pressing bodies (9) so that the constricted portion (A) moves, whereby the actuating member (6) is peristaltic, and the internal fluid is discharged. Will be pumped.

On the other hand, the flexible expansion / contraction pressing bodies (9), (9) ... Forming the constricted portion (A) have flexibility and
Since the volume changes due to the inflow and outflow of the working fluid, the flexible expansion and contraction pressing bodies (9), (9), etc. are flexibly deformed even when the solid matter is likely to be trapped, and the solid matter is trapped. Is less likely to occur and solids are easily removed. Further, by adjusting the supply amount of the working fluid to the flexible telescopic pressing bodies (9), (9), ..., the flexible telescopic pressing bodies (9), (9).
If the volume of ... is changed, the cross-sectional area of the constricted portion (A) can be changed freely according to the particle size and shape of the solid matter.

According to the second aspect of the invention, the fluid flow path (7) is formed between the casing (4) and the operating member (6), and the operating space (8) is formed in the operating member (6). Has been formed. By the flexible expansion / contraction pressing bodies (9), (9) ..., the flexible expansion / contraction pressing bodies (9), (9) in the working space (8).
When the member expands and contracts, the actuating member (6) is peristaltic, and the fluid is pumped in the annular fluid flow path (7) formed between the casing (4) and the actuating space (8).

According to the third aspect of the invention, when the solid matter in the fluid is caught in the flexible expansion / contraction pressing bodies (9), (9), ... Occurs, and the bite detection means (31) detects this bite abnormality. The pressing body contraction control means (B) receives this biting abnormality signal, and the pressing body contraction control means (B) receives the volume of the biting part or all of the flexible telescopic pressing bodies (9), (9) .... To reduce. Then, the flexible expansion / contraction pressing bodies (9), (9) ... Contract and the fluid flow path (7) expands, and the flexible expansion / contraction pressing bodies (9), (9). Are removed.

[0018]

As described above, according to the invention of claim 1, the flexible telescopic pressing members (9), (9), ... Which cause the actuating member (6) to perform a peristaltic motion are flexible. In addition, since the volume is variable by the inflow and outflow of the working fluid, it is possible to flexibly deform the solid matter even if the solid matter is likely to be caught. Also, the volume adjusting means (2)
Can freely change the cross-sectional area of the constricted portion (A) according to the particle size and shape of the solid matter, and can provide a peristaltic pump in which the solid matter is less likely to be caught.

Further, even when biting occurs, the flexible expansion / contraction pressing bodies (9), (9) ... With variable volume can be flexibly deformed, and therefore work can be performed without disassembling the peristaltic pump. It is possible for a person to remove the bitten solid matter, and to restart the operation quickly and easily.

Further, since the flexible expansion / contraction pressing bodies (9), (9) ... Are operated by the volume adjusting means (2), the volume adjusting means (2) and the flexible expansion / contraction pressing bodies (9), (9), 9) The volume adjusting means (2) can be installed separately from the casing (4) as long as they are connected to each other by piping, and the degree of freedom in design can be increased.

According to the second aspect of the present invention, since the flexible expansion / contraction pressing bodies (9), (9) ... Are arranged in the actuating member (6), the flexible expansion / contraction pressing body having a small volume. (9), (9) ...
... and a small-capacity drive pump (2) can exhibit the same effect as the invention of claim 1.

According to the third aspect of the present invention, when the bite occurs, the bite detection means (31) detects an abnormal bite, and the pressing body contraction control means (B) causes the fluid flow path (7). Can be extended, so that the operation can be restarted quickly and easily without the operator's hand being hurt.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the peristaltic pump comprises a peristaltic pump body (1) and a drive pump (2) as a volume adjusting means. The peristaltic pump body (1) comprises:
It is connected to the transfer pipe (3) by flange joining.

In the peristaltic pump body (1), an inlet (4a) and an outlet (4b) are opened at both ends of the casing (4), and a large diameter portion (5) having a slightly large inner diameter is formed inside. The operating member (6) is inserted in the large diameter portion (5). The actuating member (6) is formed in a tubular shape with both ends open, and both ends are fixed to the pipe wall near the inlet (4a) and the outlet (4b) of the casing (4). The inside of the operating member (6) serves as a fluid flow path (7) through which the fluid flows, while an annular operating space (7) is formed between the large diameter portion (5) of the casing (4) and the operating member (6). 8).

In the working space (8), eight annular flexible telescopic pressing members (9), (9) ... Are arranged side by side.
Each of the flexible telescopic pressing bodies (9), (9) ... Is inserted so as to surround the actuating member (6). The flexible telescopic pressing bodies (9), (9) ...
It is connected to the drive pump (2) through hydraulic pipes (10), (10) ..., and the drive pump (2) converts the working oil, which is the working fluid, into the flexible telescopic pressing bodies (9), (9). Expands and contracts by flowing in or out of.

The material of the actuating member (6) is elastically deformable, and has a thickness and material capable of appropriately responding to the expansion and contraction of the flexible expansion / contraction pressing bodies (9), (9). Is set to.

As the material of the flexible telescopic pressing members (9), (9) ..., a flexible material such as a film or sheet of natural or synthetic rubber is used, and its shape is like a tire tube. It is formed in a ring shape.

Further, the working space (8) has a pressure reducing pump (1
6) is connected. The decompression pump (16) keeps the working space (8) at a pressure lower than that of the fluid flow path (7), and when the flexible telescopic pressing bodies (9), (9) ... (8) is a flexible stretchable pressing body (9), (9)
I try to make it easy to follow. As a result, it is possible to improve the responsiveness of the working space (8) to the volume change of the flexible expansion / contraction pressing bodies (9), (9) ....

Further, the flexible stretchable pressing bodies (9), (9) ...
Are fixed to the casing (4). This allows
Flexible expansion / contraction pressing bodies (9), (9) ... are working spaces (8)
It is possible to prevent the movement of the inside, and it is possible to surely cause the actuating member (6) to perform the peristaltic movement which is the movement of the constricted portion (A).

The drive pump (2) is flexible so that the flexible expansion / contraction pressure bodies (9), (9), ... Interlock with each other to form and restore the constricted portion (A) regularly. Flexible expansion / contraction pressing bodies (9), (9), ...
(9) The volume of is changed so that the actuating member (6) causes a peristaltic movement.

As the drive pump (2) that operates in this way, there are a hydraulic multi-cylinder swash plate pump and a star pump using a crank mechanism.

As shown in FIG. 3, the multi-cylinder swash plate pump (15a) includes a motor (21) and four hydraulic cylinders (2).
2), (22) and so on. An inclined plate (23) is attached to the tip of the drive shaft (21a) of the motor (21), and a piston (24) of each hydraulic cylinder (22), (22) ... Is attached to the peripheral edge of the inclined plate (23). , (2
4) ... are arranged in a circle, and the piston (2
The tips of 4), (24) ... Are rotatably connected to the inclined plate (23). Nth and n + from the inlet (4a) side
The fourth (n = 1,2,3,4) flexible expansion / contraction pressers (9) and (9) have the same hydraulic cylinders (22) and (22).
...... connected to two flexible expansion / contraction pressing bodies (9), (9) of four types each having a volume change, and hydraulic pipes (10), (1).
0) ... through four hydraulic cylinders (22), (2
2) ... are connected in the order of orbit. When the tilt plate (23) is rotated by driving the motor (21),
Since the connecting position of the inclined plate (23) changes up and down, the four pistons (24), (24) ...
2), (22) ... Are pushed in and pulled out, and four kinds of volume changes having different phases are performed by one rotation of the inclined plate (23).

As a result, the driving pumps (2) simultaneously perform four types of volume changes, two by two, and the nth and n + 4th flexible telescopic pressing bodies (9), (9) from the inlet (4a) side.
Becomes the same volume change. The period of peristaltic movement from the constricted part (A) to the next constricted part (A) is formed by the four flexible telescopic pressing bodies (9), (9) ... Will result in two peristaltic cycles.

As shown in FIG. 4, the star pump (15b) has a drive section (26) in which a motor (21) is housed.
4 hydraulic cylinders (22), (2
2) is formed, and the crank rod (2
The pistons (24), (24), ... Of the hydraulic cylinders (22), (22) ... Are connected to the tip of 7), and the pistons (24), (24) ,. Perform a reciprocating motion corresponding to two cycles of peristaltic motion.

Further, as shown in FIG. 1, each hydraulic pipe (10), (10) ... Is connected to a pressure sensor (31) as a biting abnormality detecting means and a connecting pipe (32). Reserve tank (33) and oil cooler (3
4) and purge valves (35), (35) ... Are interposed in the connecting pipe (32).

The pressure sensor (31) is connected to the controller (36), and the controller (36) is configured to drive the drive pump (2) during steady operation. Further, the controller (36) is provided with pressing body contraction control means (B) and alarm command means (C). The pressing body contraction control means (B) includes a pressure sensor (3
When the abnormal signal from 1) is received, the purge valve (35) is controlled to open, and all flexible telescopic pressing bodies (9), (9).
... is configured to reduce the volume. Also,
The alarm command means (C) is configured to receive an abnormal signal from the pressure sensor (31) and activate the alarm means (D). The alarm means (D) may be an alarm buzzer (37) shown in FIG. 1 or an alarm lamp.

Next, the operation of the peristaltic pump will be described.

As shown in FIG. 5 (a), the drive pump (2) continuously generates four different volume changes with respect to the flexible telescopic pressing bodies (9), (9) .... , Nth and n + 4th from the inlet (4a) side (n = 1, 2, 3,
4) The flexible expansion / contraction pressure bodies (9), (9) ... Are press-fitted or sucked with the same volume of hydraulic oil to form or restore two constricted portions (A) in the operating member (6). .. Thereby, as shown in FIGS. 5B to 5D, the constricted portion (A) is formed.
Moves from the inlet (4a) to the outlet (4b), and the fluid is pumped.

On the other hand, adjacent flexible stretchable pressing bodies (9),
Since there is a difference in volume in (9), there is a difference in length in the inner diameter direction, and the solid matter in the fluid flow path (7) enters between the two via the actuating member (6) and bites in. In some cases, the tendency is large in the constricted part (A). In such a case, the flexible expansion / contraction pressing bodies (9), (9), ... Are flexible and change in volume due to inflow / outflow of hydraulic oil. (9) ... deforms flexibly, and solids pass without being caught.

On the other hand, the flexible stretchable pressing bodies (9), (9) ...
When the solid matter in the fluid is caught in the hydraulic fluid, the hydraulic oil cannot flow in any more, resulting in abnormal pressure in the hydraulic pipes (10), (10). This pressure abnormality is detected by the pressure sensor (31).
Is detected, the pressing body contraction control means (B) receives the detected abnormal signal, and controls the opening of the purge valve (35). As a result, the flexible stretchable pressing bodies (9), (9) ...
The hydraulic oil therein is stored in the reserve tank (33), and all the flexible telescopic pressing bodies (9), (9) ... Contract.
Therefore, the fluid channel (7) is expanded, and the solid matter is removed from the flexible stretchable pressing bodies (9), (9), .... at the same time,
When the alarm command means (C) receives the abnormal signal from the pressure sensor (31), the alarm buzzer (37) is activated to notify the bite abnormality.

According to this embodiment, since the flexible expansion / contraction pressing members (9), (9) ... Forming the constricted portion (A) have variable volumes, solid matter is likely to be caught. However, the flexible stretchable pressing bodies (9), (9) ... Can be flexibly deformed, and the biting of solid matter is unlikely to occur. Further, by adjusting the amount of hydraulic oil supplied to the flexible expansion / contraction pressing bodies (9), (9), ..., the flexible expansion / contraction pressing bodies (9), (9) ,.
Since the volume of ... Can be changed, the cross-sectional area of the constricted portion (A) can be freely changed according to the particle size and shape of the solid matter, and also from this point, biting can be prevented. ..

Further, even if biting occurs, the flexible expansion / contraction pressing bodies (9), (9), ... Can be flexibly deformed, so that the peristaltic pump main body (1) is not disassembled. The operator can remove the solid matter.

Further, since it is possible to detect the bite abnormality and expand the fluid flow path (7), the bitten solid matter can be immediately removed without the operator's hand being affected. Therefore, the operation can be restarted quickly and easily.

Since the flexible pumps (9), (9), ... Are operated by the drive pump (2), the drive pump can be connected by connecting the hydraulic pipes (10), (10). (2) can be installed separately from the peristaltic pump body (1), and the degree of freedom in design can be increased.

The flexible expansion / contraction pressing bodies (9), (9), etc. that contract when biting occurs may be limited to only the biting portion.

Next, FIG. 6 shows a first modification of the peristaltic motion. In this modified example, the actuating member (6) is caused to perform a peristaltic motion having a rectangular cross section, and instead of the annular flexible telescopic pressing bodies (9), (9), ... Two rows of flexible telescopic pressing bodies (9), (9) ... Are arranged on both sides (upper and lower sides in the figure) of the member (6), and the two rows of flexible telescopic pressing bodies (9), (9) are arranged. ) ... The volume of the flexible expansion / contraction pressing bodies (9), (9), ... Which oppose each other is operated with a phase difference.

Spherical bodies such as spheres and ellipsoidal spheres are used as the flexible stretchable pressing bodies (9), (9) ....

The upper and lower two rows of flexible telescopic pressing bodies (9), (9), ... Are connected to two drive pumps (2), (2) in order to adjust the volume. .. 2
The formation of the periodic peristaltic motion is similar to that of the above-mentioned embodiment, and the drive mechanism of each drive pump (2), (2) is similar to that of the above-mentioned embodiment.

In this modification, since the upper and lower flexible telescopic pressing members (9), (9), ... Do not simultaneously reach the maximum volume when forming the constricted portion (A), the effect of preventing biting is increased. be able to.

The number of drive pumps (2) may be one. In that case, since the volume changes of the 16 flexible expansion / contraction pressing bodies (9), (9), etc. in the upper and lower two rows are summarized into four types of changes of four, one hydraulic cylinder. (2
Four flexible expansion / contraction pressing bodies (9), (9), ... Which change the same volume are connected to 2), and four kinds of volume changes are performed at the same time.

Next, FIG. 7 shows a second modification in which the fluid passage and the working space are exchanged. In this modification, the fluid flow path (7) is formed between the casing (4) and the operating member (6), and the operating space (8) is formed in the operating member (6) formed in the closed container. It is a thing.

In the operating member (6), the pressing body support cylinder (4
0) is accommodated, and eight annular flexible expansion / contraction pressing bodies (9), (9) ... Are arranged on the outer periphery of the pressing body supporting cylinder (40). The hydraulic pipes (10), (10), ... Are passed through the pressing body supporting cylinder (40) to the respective flexible telescopic pressing bodies (9),
(9) ... is connected to. Caps (4) for reducing fluid flow resistance are provided at both ends of the operating member (6).
1) and (41) are worn. In addition, the drive mechanism of the drive pump (2) and the flexible telescopic pressing body (9),
The operating mechanism of (9) ... Is the same as in the above embodiment. When the actuating member (6) performs the peristaltic movement, the fluid is pumped to the annular fluid flow path (7) formed between the casing (4) and the actuating space (8).

According to this modification, when the same casing (4) as in the above-mentioned embodiment is used, the flexible expansion / contraction pressing bodies (9), (9) of small volume and the drive pump (of small capacity) By 2) and, the pump function can be exhibited.

Also in this modification, the rectangular peristaltic motion of the first modification may be performed in this modification.

Further, in the above-mentioned embodiment, the flexible expansion / contraction pressing bodies (9), (9), ... whose volume is reduced by the pressing body contraction control means (B) may be only the engaging portion.

Further, in the above-mentioned embodiment and modification,
The working fluid may be air, and in that case, the drive pump includes a compressor and a rotary valve, and the high-pressure air from the compressor is compressed by the rotary valve into the flexible telescopic pressing bodies (9), (9) ... To be distributed to ...

Further, the flexible stretchable pressing bodies (9), (9) ...
The number of ... And the period of the peristaltic movement are not limited to those in the present embodiment, and can be set freely, but it is necessary to be an integral multiple of the hydraulic cylinder of the drive pump to be installed.

Further, since the elastically deformable actuating member (6) can restore itself to its original shape, the decompression pump (16).
Need not be provided. Further, in the above-described embodiment and the first modification, the working space (8) is not formed in the fluid flow path (7), and therefore may not be hermetically sealed.

[Brief description of drawings]

FIG. 1 is an overall view showing a peristaltic pump according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a peristaltic pump body.

FIG. 3 is a perspective view of a multi-cylinder swash plate pump showing a distribution state of hydraulic oil to a flexible telescopic pressing body.

FIG. 4 is a perspective view of a star pump showing a distribution state of hydraulic oil to a flexible stretchable pressing body.

5 (a), (b), (c), (d) are cross-sectional views showing a peristaltic movement.

6 (a), (b), (c) and (d) are cross-sectional views showing a peristaltic movement, showing a first modification of the present invention.

FIG. 7 is a sectional view showing a peristaltic pump body according to a second modification of the present invention.

[Explanation of symbols]

 2 Drive Pump (Volume Adjusting Means) 4 Casing 4a Inlet 4b Outlet 6 Actuating Member 7 Fluid Flow Path 8 Working Space 9 Flexible Telescopic Pushing Body 31 Pressure Sensor (Bite Abnormality Detecting Means) A Constriction B B Pushing Body Contraction Control means

Claims (1)

Claims: What is claimed is: 1. A casing is housed in a casing (4), one end of which is a tubular shape is formed at an inlet (4a) and the other end is formed at an outlet (4b), and the inside of The elastically deformable actuating member (6) formed in the fluid flow path (7) and the actuating member (6) in the actuating space (8) formed between the casing (4) and the actuating member (6). 6) A plurality of variable volume flexible flexures arranged in the longitudinal direction of 6) to form a constriction (A) in the actuating member (6) and to expand and contract to restore the constriction (A). Stretchable pressing body (9),
(9) ... And the flexible expansion / contraction pressing bodies (9), (9) ...
The working fluid is supplied to the ... And the working fluid is discharged from the flexible expansion / contraction pressing bodies (9), (9) ..., and the constricted portion (A) flows from the inflow port (4a) to the outflow port (4b). Each flexible telescopic pressing body (9), (9) ... so that it may move toward.
A peristaltic pump, comprising: a volume adjusting means (2) for changing the volume of. 2. A working space (8) which is housed in the casing (4) so as to form an annular fluid flow path (7) through which a fluid flows between the casing (4) and the inside of which is sealed.
A plurality of elastically deformable actuating members (6) formed in the same and a plurality of actuating members (6) arranged in the actuating space (8) in the longitudinal direction of the actuating members (6) and constricted portions (A). A plurality of flexible expansion / contraction pressing bodies (9), (9), which form a plurality of parts and expand and contract so that the constricted portion (A) is restored, and the flexible expansion / contraction pressing body ( 9),
While supplying the working fluid to (9) ..., the working fluid is discharged from the flexible telescopic pressing bodies (9), (9).
Each flexible telescopic pressing body (9), so that the constricted portion (A) moves from the inflow port (4a) toward the outflow port (4b).
(9) A peristaltic pump comprising: a volume adjusting means (2) for changing the volume of. 3. The peristaltic pump according to claim 1 or 2, wherein a solid matter in the fluid is caught in the flexible telescopic pressing bodies (9), (9), ... with an operating member (6) interposed therebetween. The biting abnormality detecting means (31) for detecting the error and the abnormality signal from the biting abnormality detecting means (31), and the flexible telescopic pressing bodies (9), (9) corresponding to the biting portion. Alternatively, a peristaltic pump is provided with pressing body contraction control means (B) for reducing the volume of all of the flexible telescopic pressing bodies (9), (9) ....