JP6603517B2 - Suction port structure - Google Patents

Description

  The present invention relates to a suction port structure that sucks fluid from a suction port of a cylindrical member.

  At construction sites and civil engineering sites, pump tubes that suck and convey raw concrete are used to cast concrete.

JP 05-005480 A

  In general, a squeeze pump or a piston pump is used as such a pump tube. Moreover, although it has not been put into practical use, it is also possible to use a peristaltic pump using a peristaltic motion (see, for example, Patent Document 1).

  However, in a squeeze pump or a piston pump, fluid is sucked with one pump. For this reason, it is necessary to generate a high negative pressure in order to suck in a fluid having a high viscosity such as raw concrete. As a result, the pressure loss in the tube becomes excessive, and the fluid suction efficiency deteriorates. In addition, due to the high negative pressure, the fluid moisture may evaporate to compensate for the vapor pressure drop.

  On the other hand, in the peristaltic pump, fluid is conveyed by sequentially expanding and contracting a plurality of divided units. Thereby, since the driving force is dispersed, it is not necessary to generate a high negative pressure like a squeeze pump or a piston pump. However, a fluid with high viscosity, such as raw concrete, is difficult to be sucked into the tube if the generated negative pressure is small, and the problem still remains that the fluid suction efficiency is lowered.

  Then, an object of this invention is to provide the suction inlet structure which can improve the suction efficiency of the fluid with respect to a cylindrical member.

  The suction port structure according to the present invention includes a cylindrical member that sucks fluid from the suction port, and a scraping portion that is attached to a distal end portion of the cylindrical member on the suction port side and scrapes the fluid into the suction port.

  In the suction port structure according to the present invention, since the scraping portion is attached to the tip portion of the cylindrical member on the suction port side, the fluid is forcibly scraped into the suction port by the scraping portion. Thereby, the suction efficiency of the fluid with respect to a cylindrical member can be improved.

  In this case, the cylindrical member is a peristaltic motion pump that sucks and conveys fluid by a peristaltic motion, and the scavenging portion preferably stirs the fluid into the peristaltic motion pump when the fluid is sucked into the suction port. In this suction port structure, since the fluid is sucked by the peristaltic pump, the sucked fluid can be conveyed with a small driving force even if the viscosity of the fluid is high. And since the scavenging part scrapes the fluid into the suction port when the fluid is sucked into the suction port, the suction efficiency of the fluid can be improved appropriately.

  The peristaltic pump includes a plurality of peristaltic units connected along the axial direction, and the peristaltic unit is disposed on the inner peripheral side of the outer cylinder part and elastically expands and contracts on the inner peripheral side of the outer cylinder part, A pressure part that sucks fluid by contracting the inner cylinder part and pushes fluid by expanding the inner cylinder part, and the scratching part is a pressurizing part in the peristaltic unit arranged on the most suction side. However, when the inner cylinder portion is contracted, it is preferable that the fluid is scraped into the suction port. In this suction port structure, in each peristaltic unit, the pressurizing part contracts and expands the inner cylinder part, so that the fluid sucked by the upstream peristaltic unit can be pushed out to the downstream peristaltic unit. In addition, when the pressurizing part contracts the inner cylinder part in the peristaltic unit arranged closest to the suction port side, the scraping part scrapes the fluid into the suction port. Can be improved.

  Further, it is preferable that the scraping portion extends from the suction port to the side opposite to the cylindrical member and bends to the suction port side. In this suction port structure, the bending portion is bent, so that the fluid existing between the suction portion and the suction port can be scraped into the suction port.

  Further, the scraping portion is a tongue piece portion that forms the outer shape of the scraping portion, and is accommodated in the tongue piece portion, and is located on the opposite side of the tongue piece portion from the proximal end portion on the suction opening side of the tongue piece portion. It is preferable that the artificial muscle tube bends the tongue piece portion toward the suction port side by expanding and contracting. In this suction port structure, the fluid existing between the tongue piece and the suction port can be scraped into the suction port by expanding and contracting the artificial muscle tube.

  Further, it is preferable that the scraping portion extends from the suction port to the side opposite to the cylindrical member and reciprocates in the axial direction of the cylindrical member. In this suction port structure, the fluid in front of the suction port can be scraped into the suction port by the reciprocating motion of the scraping portion.

  Further, the scraping portion is arranged on the outer peripheral side of the cylindrical member, and the cylindrical portion for scratching extending from the suction port to the opposite side to the cylindrical member in the axial direction of the cylindrical member, and the axial line of the cylindrical member And a reciprocating part that reciprocates the cylindrical part for scraping relative to the cylindrical member in the direction, and a reverse that prevents movement of the fluid on the inner peripheral side of the cylindrical part for scraping to the opposite side of the cylindrical member. And a stop valve. In this suction port structure, the fluid can be caused to flow into the inner peripheral side of the cylindrical portion for scraping by moving the cylindrical portion for scraping to the side opposite to the cylindrical member by the reciprocating moving portion. Thereafter, the reciprocating portion moves the scribing cylindrical portion toward the cylindrical member, so that the fluid flowing into the inner peripheral side of the scrambling cylindrical portion can be swept into the suction port by the check valve. .

  ADVANTAGE OF THE INVENTION According to this invention, the suction efficiency of the fluid with respect to a cylindrical member can be improved.

It is a schematic side view which shows the suction inlet structure which concerns on 1st embodiment. It is a schematic sectional drawing which shows a peristaltic pump. It is a schematic diagram which shows the peristaltic motion of a peristaltic motion pump. It is a schematic side view which shows the surrounding of the scavenging part of a suction inlet structure. It is a schematic front view which shows the surroundings of the suction part of a suction inlet structure. It is sectional drawing in the VI-VI line shown in FIG. It is a schematic side view which shows the state which the scrambling part contracted. It is a schematic sectional drawing for demonstrating operation | movement of a rake part. It is a schematic sectional drawing for demonstrating operation | movement of a rake part. It is a schematic sectional drawing which shows the suction inlet structure which concerns on 2nd embodiment. It is a schematic bottom view of the suction inlet structure seen from the XI arrow line direction shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a suction port structure according to the present invention will be described in detail with reference to the drawings. In all drawings, the same or corresponding parts are denoted by the same reference numerals.

(First embodiment)
FIG. 1 is a schematic configuration diagram of a suction port structure according to the first embodiment. As shown in FIG. 1, the suction port structure 1 according to the first embodiment includes a peristaltic pump 2 and a scavenging portion 3.

  The peristaltic pump 2 is a cylindrical member that sucks fluid by peristaltic motion. In the present embodiment, the peristaltic pump 2 is described as being formed in a cylindrical shape, but the cylindrical shape of the peristaltic pump 2 is not particularly limited. Inside the peristaltic pump 2, a flow path 4 through which fluid flows is formed, and at one end of the peristaltic pump 2, a suction port 5 for sucking fluid into the flow path 4 is formed.

  Here, the peristaltic motion of peristaltic pump 2 will be described in detail. FIG. 2 is a schematic sectional view showing a peristaltic pump. As shown in FIG. 2, the peristaltic pump 2 includes a plurality of peristaltic units 20 connected along the axis L direction. The plurality of peristaltic units 20 are referred to as peristaltic unit 20A, peristaltic unit 20B, peristaltic unit 20C, peristaltic unit 20D, peristaltic unit 20E in order from the suction port 5 side for convenience. For this reason, the peristaltic unit 20 closest to the suction port 5 is a peristaltic unit 20A.

  The peristaltic unit 20 includes an outer cylinder part 21, an inner cylinder part 22, and a pressure part 23.

  The outer cylinder portion 21 is a part that forms the outer shape of the peristaltic unit 20. The outer cylinder part 21 is formed in a cylindrical shape. In the present embodiment, the outer cylinder portion 21 is described as having shape retention, but may be elastically expanded and contracted as in an inner cylinder portion 22 described later.

  The inner cylinder part 22 is a part that forms the flow path 4. The inner cylinder part is formed in a cylindrical shape and is arranged on the inner peripheral side of the outer cylinder part 21. That is, the outer cylinder part 21 and the inner cylinder part 22 form a double pipe. A pressurizing passage 24 is formed between the outer cylinder portion 21 and the inner cylinder portion 22.

  The inner cylinder portion 22 is formed of a material that elastically expands and contracts. The inner cylindrical portion 22 expands when a pressurizing medium is supplied to the pressurizing passage 24. The expansion of the inner cylindrical portion 22 due to the supply of the pressurizing medium to the pressurizing passage 24 is the expansion of the inner cylindrical portion 22 inward in the radial direction. When the outer cylinder portion 21 is also formed of a material that elastically expands and contracts, when the pressurizing medium is supplied to the pressurizing passage 24, the outer cylinder portion 21 is on the opposite side of the inner cylinder portion 22 in the radial direction. Inflates outward. On the other hand, the inner cylinder portion 22 contracts when the pressurizing medium is discharged from the pressurizing passage 24. When the inner cylindrical portion 22 contracts, the fluid is sucked into the flow path 4, and when the inner cylindrical portion 22 expands, the fluid is pushed out of the flow path 4.

  The pressurizing unit 23 is connected to the pressurizing passage 24. The pressurizing unit 23 supplies the pressurizing medium to the pressurizing passage 24 and discharges the pressurizing medium from the pressurizing passage 24. As the pressurizing unit 23, various pumps can be used.

  FIG. 3 is a schematic diagram showing the peristaltic motion of the peristaltic pump. In FIG. 3, the pressurizing unit 23 is not shown for easy understanding. As shown in FIG. 3, first, the suction port 5 of the peristaltic pump 2 is inserted into the fluid. Then, the pressurizing medium is supplied to the pressurizing passage 24 in the peristaltic unit 20A (see FIG. 3A). Then, in the peristaltic unit 20A, the inner cylinder part 22 expands and the flow path 4 is closed.

  Next, the pressurizing medium is supplied to the pressurizing passage 24 in the peristaltic unit 20B, and the pressurizing medium is discharged from the pressurizing passage 24 in the peristaltic unit 20A (see FIG. 3B). Then, in the peristaltic unit 20B, the inner cylinder part 22 expands and the flow path 4 is closed, and in the peristaltic unit 20A, the inner cylinder part 22 contracts and the flow path 4 opens. Thereby, since the flow path 4 of the peristaltic unit 20A becomes a negative pressure, the fluid is sucked into the flow path 4 of the peristaltic unit 20A.

  Next, the pressurizing medium is supplied to the pressurizing passage 24 in the peristaltic unit 20C, the pressurizing medium is discharged from the pressurizing passage 24 in the peristaltic unit 20B, and the pressurizing medium is supplied to the pressurizing passage 24 in the peristaltic unit 20A. (See (c) of FIG. 3). Then, in the peristaltic unit 20C, the inner cylindrical part 22 expands and the flow path 4 is closed, in the peristaltic unit 20B, the inner cylindrical part 22 contracts and the flow path 4 opens, and in the peristaltic unit 20A, the inner cylindrical part 22 expands. The flow path 4 is closed. Thereby, the fluid sucked into the flow path 4 of the peristaltic unit 20A is pushed out of the flow path 4 of the peristaltic unit 20A and sucked into the flow path 4 of the peristaltic unit 20B.

  Next, the pressurizing medium is supplied to the pressurizing passage 24 in the peristaltic unit 20D, the pressurizing medium is discharged from the pressurizing passage 24 in the peristaltic unit 20C, and the pressurizing medium is supplied to the pressurizing passage 24 in the peristaltic unit 20B. Then, the pressurizing medium is discharged from the pressurizing passage 24 in the peristaltic unit 20A (see FIG. 3D). Then, in the peristaltic unit 20D, the inner cylinder part 22 expands and the flow path 4 is closed, in the peristaltic unit 20C, the inner cylinder part 22 contracts and the flow path 4 opens, and in the peristaltic unit 20B, the inner cylinder part 22 expands. The flow path 4 is closed, and in the peristaltic unit 20A, the inner cylinder portion 22 contracts and the flow path 4 is opened. Thereby, the fluid sucked into the flow path 4 of the peristaltic unit 20B is pushed out of the flow path 4 of the peristaltic unit 20B and sucked into the flow path 4 of the peristaltic unit 20C. Further, the fluid is sucked into the flow path 4 of the peristaltic unit 20A.

  Thus, in the peristaltic pump 2, the fluid is sucked and conveyed by the peristaltic motion that repeats the expansion and contraction of the inner cylindrical portion 22 in each peristaltic unit 20. However, the liquid is sucked into the flow path 4 from the suction port 5 only by the negative pressure generated in the flow path 4 of the peristaltic unit 20A. For this reason, when a fluid with high viscosity, such as raw concrete, is sucked into the flow path 4 from the suction port 5, the suction efficiency of the fluid decreases.

  FIG. 4 is a schematic side view showing the vicinity of the scavenging portion of the suction port structure. FIG. 5 is a schematic front view showing the vicinity of the scavenging portion of the suction port structure. 6 is a cross-sectional view taken along line VI-VI shown in FIG. FIG. 7 is a schematic side view showing a state where the scraping portion is contracted. As shown in FIG. 1 and FIG. 4 to FIG. 7, the scraping portion 3 is attached to the tip of the peristaltic pump 2 on the suction port 5 side and scrapes the fluid into the suction port 5 of the peristaltic pump 2. It is. The scraping portion 3 extends from the suction port 5 to the side opposite to the peristaltic pump 2 and bends to the suction port 5 side. More specifically, the scraping unit 3 includes a tongue piece 31, an artificial muscle tube 32, and a pressurizing medium supply unit 33.

  The tongue piece portion 31 is a member that forms the outer diameter of the scraping portion 3. The tongue piece 31 is formed in a tongue shape extending from the suction port 5 to the opposite side of the peristaltic pump 2. Moreover, the tongue piece part 31 is formed in the hollow bag shape so that the artificial muscle tube 32 can be accommodated in the inside. The tongue piece 31 is made of a material that can be bent and deformed, and can be made of a resin material such as rubber, for example.

  Here, in the side view of the peristaltic pump 2 (see FIG. 4), the region located on one side is referred to as one side region A with the axis L of the peristaltic pump 2 as a reference, and the region located on the other side is referred to as the other side. This is called side region B. The tongue piece 31 extends from the suction port 5 to the side opposite to the peristaltic pump 2 in the one side region A. Further, the tongue piece portion 31 is curved so as to cover the suction port 5 in the other side region B, and the distal end portion of the tongue piece portion 31 is located in the other side region B. In addition, the cross-sectional shape of the tongue piece part 31 in the direction crossing the axis L of the peristaltic pump 2 is an arc shape.

  The artificial muscle tube 32 is a member that is accommodated in the tongue piece portion 31 and bends the tongue piece portion 31 toward the suction port 5. The artificial muscle tube 32 is composed of a rubber tube whose periphery is covered with fibers. The artificial muscle tube 32 extends from the proximal end portion of the tongue piece portion 31 on the suction port 5 side to the distal end portion of the tongue piece portion 31 opposite to the suction port 5. Specifically, both end portions of the artificial muscle tube 32 are positioned at the proximal end portion of the tongue piece portion 31 on the suction port 5 side, and the central portion of the artificial muscle tube 32 is the suction port 5 of the tongue piece portion 31. It is located at the tip on the opposite side.

  Inside the artificial muscle tube 32, a pressurizing passage 32a through which a pressurizing medium flows is formed. When the pressurizing medium is supplied to the pressurizing passage 32a, the artificial muscle tube 32 expands and contracts to shorten (see FIG. 7). As a result, the artificial muscle tube 32 pulls the tongue piece portion 31 into the suction port by pulling the distal end portion of the tongue piece portion 31 opposite to the suction port 5 to the proximal end portion of the tongue piece portion 31 on the suction port 5 side. Bend to the 5th side. On the other hand, when the pressurizing medium is discharged from the pressurizing passage 32a, the artificial muscle tube 32 relaxes and extends and becomes long (see FIG. 4). Thereby, the tongue piece part 31 returns to the original state. In addition, in order to return the tongue piece part 31 to the original state, for example, the restoring force of the tongue piece part 31 may be used, and biasing means for biasing the tongue piece part 31 to the one side region A is used. May be.

  The pressurizing medium supply unit 33 is connected to the pressurizing passage 32a. The pressurizing medium supply unit 33 supplies the pressurizing medium to the pressurizing passage 32a and discharges the pressurizing medium from the pressurizing passage 32a. Specifically, the pressurizing medium supply unit 33 supplies the pressurizing medium to the pressurizing passage 32 a when sucking the fluid into the suction port 5, so that the scavenging unit 3 supplies the suction port 5 with the pressurizing medium. Stir fluid. That is, the scraping unit 3 scrapes the fluid into the suction port 5 when the pressurizing unit 23 contracts the inner cylindrical unit 22 in the peristaltic unit 20A (see FIGS. 3B and 3D). On the other hand, the pressurizing medium supply unit 33 squeezes the fluid into the suction port 5 by the scrambling unit 3 by discharging the pressurization medium from the pressurization passage 32 a while the fluid is not sucked into the suction port 5. No. As the pressurizing medium supply unit 33, various pumps can be used.

  Next, the operation of the suction port structure 1 will be described with reference to FIGS. 8 and 9 are schematic cross-sectional views for explaining the operation of the scraping portion.

  First, as shown in FIG. 8, while the pressurizing unit 23 expands the inner cylinder portion 22 in the peristaltic unit 20A, the pressurizing medium supply unit 33 discharges the pressurizing medium from the pressurizing passage 32a. Thus, the artificial muscle tube 32 is in an expanded and contracted state. Thereby, while the flow path 4 of the peristaltic unit 20 </ b> A is closed, the fluid is not scraped into the suction port 5 by the scraping unit 3.

  Then, as shown in FIG. 9, when the pressurizing unit 23 contracts the inner cylindrical part 22 in the peristaltic unit 20A, the pressurizing medium supply unit 33 supplies the pressurizing medium to the pressurizing passage 32a. The muscle tube 32 is expanded and contracted. Thereby, when the flow path 4 of the peristaltic unit 20 </ b> A is opened and the fluid is sucked into the suction port 5, the fluid is scraped into the suction port 5 by the scraping unit 3.

  As described above, in the suction port structure 1 according to the present embodiment, the scraping unit 3 is attached to the tip of the peristaltic pump 2 on the suction port 5 side. It is stirred into the suction port 5. Thereby, the suction efficiency of the fluid with respect to the peristaltic pump 2 can be improved.

  Moreover, in this suction inlet structure 1, since the fluid is sucked by the peristaltic pump 2, even if the viscosity of the fluid is high, the sucked fluid can be conveyed with a small driving force. Then, when the fluid is sucked into the suction port 5, the scraping unit 3 scrapes the fluid into the suction port 5, so that the suction efficiency of the fluid can be improved appropriately.

  Further, in this suction port structure 1, in each peristaltic unit 20, the pressurizing portion 23 contracts and expands the inner cylindrical portion 22, so that the fluid sucked by the upstream peristaltic unit 20 is transferred to the downstream peristaltic unit 20. Can be extruded. Then, when the pressurizing unit 23 contracts the inner cylinder part 22 in the peristaltic unit 20 </ b> A arranged closest to the suction port 5, the scraping unit 3 scrapes the fluid into the suction port 5. Therefore, the fluid suction efficiency can be appropriately improved.

  Further, in the suction port structure 1, the artificial muscle tube 32 is expanded and contracted, so that the scraping portion 3 is bent toward the suction port 5 side. Thereby, the fluid existing between the tongue piece portion 31 and the suction port 5 can be scraped into the suction port 5.

(Second embodiment)
Next, the suction inlet structure according to the second embodiment will be described. The second embodiment is basically the same as the first embodiment, but only the scraping portion is different from the first embodiment. For this reason, below, only the matter which is different from 1st embodiment is demonstrated, and description of the matter similar to 1st embodiment is abbreviate | omitted.

  FIG. 10 is a schematic cross-sectional view showing a suction port structure according to the second embodiment. FIG. 11 is a schematic bottom view of the suction port structure viewed from the direction of the arrow XI shown in FIG. As shown in FIGS. 10 and 11, the suction port structure 11 according to the second embodiment includes a peristaltic pump 2 and a scavenging portion 6.

  The scraping unit 6 is a member that is attached to the tip of the peristaltic pump 2 on the suction port 5 side and scrapes the fluid into the suction port 5 of the peristaltic pump 2 in the same manner as the scraping unit 6 of the first embodiment. It is. The scraping portion 6 extends from the suction port 5 to the opposite side of the peristaltic pump 2 and reciprocates in the direction of the axis L of the peristaltic pump 2. More specifically, the scraping portion 6 includes a scraping cylindrical portion 61, a reciprocating movement portion 62, and a check valve 63.

  The take-up cylindrical portion 61 is a member that reciprocates in the direction of the axis L of the peristaltic pump 2. The take-up tubular portion 61 is formed in a tubular shape, and is disposed on the outer peripheral side of the outer tubular portion 21. Further, the take-up cylindrical portion 61 extends from the suction port 5 to the side opposite to the peristaltic pump 2 in the axis L direction of the peristaltic pump 2.

  The reciprocating unit 62 is a member that causes the peristaltic pump 2 to reciprocate with respect to the peristaltic pump 2 in the axis L direction of the peristaltic pump 2. The specific configuration of the reciprocating unit 62 is not particularly limited. For example, a bearing mechanism that supports the scrambling cylinder 61 so as to be slidable in the axis L direction with respect to the peristaltic pump 2. And a driving device such as a motor for reciprocating the scrambling tubular portion 61 in the direction of the axis L with respect to the peristaltic pump 2.

  The check valve 63 is a member that prevents the fluid on the inner peripheral side of the take-up cylindrical portion 61 from moving to the side opposite to the peristaltic pump 2. The check valve 63 includes a plurality of leaflets 63a and a shaft portion 63b that pivotally supports each leaflet 63a so as to swing within a predetermined angle range. The shaft portion 63b allows each valve leaf 63a to swing to the peristaltic pump 2 side from the position where the inner circumferential side space of the scraping cylindrical portion 61 is closed. Swinging from the position of closing the space on the inner peripheral side to the side opposite to the peristaltic pump 2 is restricted. As the check valve 63, for example, a medical mechanical valve can be used.

  Next, operation | movement of the suction inlet structure 11 is demonstrated.

  First, while the pressure unit 23 expands the inner cylinder part 22 in the peristaltic unit 20 </ b> A, the reciprocating movement part 62 moves the cylindrical part 61 for scraping to the side opposite to the peristaltic pump 2. Thereby, each leaflet 63a of the check valve 63 is opened, and fluid flows into the inner peripheral side of the cylindrical portion 61 for scraping.

  Then, when the pressure unit 23 contracts the inner cylinder part 22 in the peristaltic unit 20 </ b> A, the reciprocating unit 62 moves the take-up cylindrical part 61 to the peristaltic pump 2 side. Then, each leaflet 63a of the check valve 63 is closed. Thereby, when the flow path 4 of the peristaltic unit 20 </ b> A is opened and the fluid is sucked into the suction port 5, the fluid that has flowed into the inner peripheral side of the take-up cylindrical portion 61 is allowed to flow into each valve leaf 63 a of the check valve 63. Is pushed into the suction port 5.

  As described above, in the suction port structure 11 according to the present embodiment, the fluid in front of the suction port 5 can be scraped into the suction port by the reciprocating motion of the scraping unit 3. That is, the reciprocating unit 62 moves the scraping cylindrical portion 61 to the side opposite to the peristaltic pump 2, thereby allowing fluid to flow into the inner peripheral side of the scratching cylindrical portion 61. Thereafter, the reciprocating part 62 moves the scraping cylindrical part 61 to the peristaltic pump 2 side, so that the fluid flowing into the inner peripheral side of the scratching cylindrical part 61 is sucked into the suction port 5 by the check valve 63. Can be rubbed into.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, in the above embodiment, the cylindrical member is described as a peristaltic pump, but the cylindrical member may be a tube connected to a squeeze pump or a piston pump.

  Further, in the first embodiment, the scavenging part is bent toward the suction port side to scavenge the fluid into the suction port, and in the second embodiment, the scoring part is reciprocated in the axial direction of the cylindrical member. Although the description has been given assuming that the fluid is scraped into the suction port, the scraping portion may be configured to scrape the fluid into the suction port by other methods.

  Further, in the first embodiment, the tongue piece portion has a shape extending from the one side region to the other side region, so that the tongue piece portion is bent toward the suction port side by an artificial muscle tube that simply expands and contracts. However, the tongue piece portion may be bent toward the suction port side by regulating the direction in which the artificial muscle tube expands and contracts.

  Moreover, although 2nd embodiment demonstrated as what reciprocates a cylindrical member, the member to reciprocate may be a rod-shaped or cross-sectional arc-shaped member. In this case, instead of the check valve, a simple protrusion protruding from the reciprocating member toward the axial line of the cylindrical member may be used.

  DESCRIPTION OF SYMBOLS 1,11 ... Suction port structure, 2 ... Peristaltic pump, 3 ... Scratch part, 4 ... Flow path, 5 ... Suction port, 6 ... Scratch part, 20 (20A, 20B, 20C, 20D, 20E) ... Peristaltic Unit: 21 ... Outer cylinder part, 22 ... Inner cylinder part, 23 ... Pressurizing part, 24 ... Pressurizing passage, 31 ... Tongue piece part, 32 ... Artificial muscle tube, 32a ... Pressurizing passage, 33 ... Pressurizing medium supply 61, cylindrical portion for scraping, 62 ... reciprocating movement portion, 63 ... check valve, 63a ... leaflet, 63b ... shaft portion, A ... one side region, B ... other side region, L ... axis.

Claims (4)

A cylindrical member that sucks fluid into the flow path from the suction port;
A scraping portion attached to a tip of the cylindrical member on the suction port side and scraping the fluid into the suction port;
The scraping portion is formed of a material that can be bent and deformed, extends from the suction port to the side opposite to the cylindrical member, and bends to the suction port side.
Suction port structure. A cylindrical member that sucks fluid into the flow path from the suction port;
A scraping portion attached to a tip of the cylindrical member on the suction port side and scraping the fluid into the suction port;
The scraping portion extends from the suction port to the side opposite to the cylindrical member, and bends to the suction port side.
The scraping portion is
A tongue piece portion forming the outer shape of the scraping portion;
An artificial muscle tube housed in the tongue piece portion and extending from a proximal end portion of the tongue piece portion on the suction port side to a distal end portion on the opposite side to the suction port of the tongue piece portion,
The artificial muscle tube expands and contracts to bend the tongue piece to the suction port side,
Suction port structure. The cylindrical member is a peristaltic motion pump that sucks and conveys the fluid by a peristaltic motion,
When the fluid is sucked into the suction port, the scraping portion scrapes the fluid into the peristaltic pump.
The suction inlet structure according to claim 1 or 2 . The peristaltic pump includes a plurality of peristaltic units connected along an axial direction,
The peristaltic unit is
An outer cylinder,
An inner cylinder part which is arranged on the inner peripheral side of the outer cylinder part and elastically expands and contracts;
A pressure part that sucks in the fluid by contracting the inner cylinder part and pushes out the fluid by inflating the inner cylinder part, and
When the pressurizing portion contracts the inner tube portion in the peristaltic unit arranged closest to the suction port side, the scraping portion scrapes the fluid into the suction port.
The suction inlet structure according to claim 3 .

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