JP2000257567A - Supplying pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability and an operation rate, and reduce initial costs and running costs by attaching an elastic seal material to an outside of a rotary locus of a rotor top part in a pump casing, and disposing a delivery port and a suction port on upper and lower parts of a rotor rotating direction where the attaching part is held. SOLUTION: When a part of an elastic seal material 13 which is brought into pressure contact with a circumferential wall 19 of a housing part 8 at a rotor top part 12 in association with rotation of a rotor 5 moves, a capacity of a suction port 9 side between the elastic seal material 13 and the circumferential wall 19 is enlarged, and thereby, a fluid is sucked from a suction port 9. When a next rotor top part 12 passes the suction port 9, the fluid 20 is closed between both rotor top parts 12, 12. When a top side rotor top part 12 passes a delivery port 10 and the next rotor top part 12 approaches the delivery port 10, a capacity in which the fluid 20 is closed is reduced, and thereby, the fluid 20 is delivered from the delivery port 10. A feed pump 1 is acted so that the fluid 20 is circulated from the suction port 9 to the delivery port 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed pump mainly used for feeding a liquid having a high viscosity, a liquid containing solid lumps such as a slurry of sludge, and a chemical liquid for corroding metals. It is about.

[0002]

2. Description of the Related Art A tube pump is generally known as this kind of feed pump. Such tube pumps
A tube connecting the suction port and the discharge port formed in the pump casing is housed in a tube storage portion formed in a substantially circular space, and the tube is pressed against the side wall of the tube storage portion to be crushed and discharged from the suction port to the discharge port. And a rotor provided with a crushing portion that moves to the tube housing portion.

[0003]

In the above-described conventional tube pump, since the tube is moved while being crushed by the crushing portion, the crushed portion (particularly, the folded portion) of the tube is damaged quickly and has low durability. There was a problem.
In addition, the tube is expensive with a reinforcing material inserted inside, and it must be replaced relatively frequently, which causes a problem that the initial cost and the running cost increase.

[0004] In addition, if the operation of the tube pump is stopped and the tube is replaced, if the tube pump is replaced relatively frequently, the operation rate of the tube pump is reduced correspondingly. In particular, for those containing lubricating liquid such as glycerin to reduce the frictional resistance between the rotor and the tube,
At the time of replacement, first, the tube can be replaced only after the lubricating liquid is drawn out, and there is a problem that the operating rate of the tube pump is further reduced. Thus, the present invention has been proposed in view of the above problems, has high durability, can reduce initial cost and running cost,
It is an object of the present invention to provide a feed pump having a high operation rate.

[0005]

To achieve the above object, a feed pump according to the present invention comprises a pump casing,
The pump casing includes a rotor housed in a rotor housing section, and an elastic sealing material interposed between a peripheral wall of the rotor housing section and a top of the rotor. It is installed outside the rotation locus of the rotor, and the suction port is opened in the pump casing on the lower side in the rotation direction of the rotor, and the discharge port is opened in the pump casing on the lower side in the rotation direction of the rotor, with the mounting portion of the elastic seal material interposed therebetween. It is a feature.

Further, the pump casing is formed of a rotor housing in which a rotor housing portion is formed and a side plate for closing a side opening of the rotor housing, and at least one of a suction port and a discharge port is formed in the rotor housing. Is formed, the elastic sealing material is formed in an annular shape, and a part thereof is attached to the pump casing.

Further, the elastic sealing material is constituted by a band-shaped material,
The end portions of the band-shaped material are overlapped with each other, and the end portion of the band-shaped material thus overlapped is fixed to the pump casing with a fixing tool, or the rotor is formed in a disk shape, and the rotor is concentric with the rotor storage portion. And a rotatable member is provided on the disk-shaped rotor in such a manner that a part thereof protrudes from the peripheral surface of the disk to form the top of the rotor.

In addition, the rotor is formed in a disk shape, and the rotor is disposed concentrically in the rotor storage portion, and a portion of the disk is formed so as to protrude to form the top of the rotor or to rotate the rotor. A shaft is provided concentrically in a rotor housing portion, and a disk or arm-shaped rotor is provided on the rotating shaft, and a top portion of the rotor is formed at a portion far from the axis of the rotating shaft. It is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a feed pump according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the feed pump, and reference numeral 1 in the figure generally indicates the feed pump. In the feed pump 1, a pump casing 2 is supported by a support 3 in which bearings (not shown) are provided, and an input shaft 4 connected to a motor such as an electric motor projects from the support 3. It is.

The pump casing 2 includes a rotor housing 6 formed to have substantially the same thickness as a thickness W of a rotor 5 described later, and side plates 7.7 for closing both sides of the rotor housing 6. 6, a rotor housing portion 8 for housing a rotor 5 described later is formed (see FIG. 2). The rotor storage section 8 is formed in a substantially perfect circle and communicates with a suction port 9 and a discharge port 10 formed near the upper end of the rotor housing 6.

The rotor 5 housed in the rotor housing 8 is formed in a disk shape as shown in FIG. 3 and is arranged concentrically with the rotor housing 8. Rotor top 12 consisting of short, cylindrical rollers 11 in position
・ 12 are provided. The cylindrical roller 11 is made of a material having a high hardness such as stainless steel, ceramic, or the like.
It is desirable to use self-lubricating Duracon, MC nylon or the like, but it is also possible to use a needle bearing (not shown) itself or a needle bearing-shaped rotating body instead of the columnar roller 11. In addition, an elastic sealing material 13 is interposed between the rotor 5 and the rotor housing portion 8 that houses the rotor 5.

As shown in FIGS. 2 and 3, the elastic sealing member 13 is formed of an elastic material having elasticity such as rubber and has toughness in a loop shape, and a part of the elastic material is formed in the suction port 9 and the discharge port. 10 is fixed to the upper end portion of the rotor housing portion 8 outside the rotation trajectory of the rotor top portions 12 by a fixture 14. The fixing device 14 is formed by engraving a semicircular groove 15 at the upper end of the rotor housing portion 8 in the thickness direction of the rotor 5, and inserting a bolt through the semicircular groove 15 from the outside of the rotor housing 6 to the semicircular groove 15. A bolt 17 inserted into the hole 16 and a portion of the bolt 17 exposed to the semicircular groove 15 are passed through the elastic seal material 13, and the elastic seal material 13 is fitted to the bolt 17 for fixing the elastic seal material. The nut 18 is formed.

The width W of the elastic seal member 13 is substantially the same as the width W of the rotor 5 as shown in FIG. 4, and the thickness t of the elastic seal member 13 is equal to the peripheral wall 19 of the rotor housing 8 and the top of the rotor. 12 is formed thicker than the gap between them. The elastic sealing member 13 is pressed against the peripheral wall 19 of the rotor housing portion 8 at the rotor top 12 so that the suction port 9 and the discharge port 10 are partitioned.

The operation of the feed pump 1 constructed as described above will now be described. First, the suction port 9 is connected to the base end of a suction duct (not shown) whose tip opens to a fluid to be fed, such as a liquid containing a solid mass such as a slurry of sludge. (Not shown). Next, when a prime mover such as an electric motor (not shown) is driven, the input shaft 4 is driven to rotate by the drive of the prime mover, and this rotation is transmitted to the rotor 5 of the feed pump 1 so that the rotor 5 is rotated as shown in FIGS. As shown in FIG. 7, it rotates in the arrow direction (counterclockwise).

When the portion of the elastic sealing material 13 which is pressed against the peripheral wall 19 of the accommodating portion 8 by the rotation of the rotor 5 and pressed against the peripheral wall 19 of the housing portion 8 moves from FIG. 2 to FIG. Since the volume on the side of the suction port 9 between the rotor housing 8 and the peripheral wall 19 gradually increases, the fluid 20 supplied from the suction port 9 via the suction duct is sucked. When the succeeding rotor top 12 passes through the suction port 9, the fluid 20 sucked into the rotor storage section 8 is moved to both rotor tops 1.
The state is trapped between 2 and 12.

As shown in FIG. 7, the rotation of the rotor 5 causes the rotor top 12 to be sent to the discharge port 10 side.
Further rotation causes the leading rotor top 12 to be
0, and when the trailing rotor top 12 approaches the discharge port 10, the volume in which the fluid 20 is confined gradually decreases, and the fluid 20 is discharged from the discharge port 10 to the supply duct. (See FIG. 7). Thereafter, by repeating this operation, the fluid 20 to be fed is suctioned from the suction port 9 and functions as the feed pump 1 discharged from the discharge port 10. As described above, since the feed pump 1 has only the rotor top 12 pressed against the inner peripheral surface of the rotor housing 6 through the elastic sealing material 13 without being in direct contact with the inner peripheral surface of the rotor housing 6, even if the fluid Even if gravel or the like is mixed in the rotor 20, the rotor 5 and the rotor housing 6 hardly wear. Therefore, the rotor top portion 12, the rotor 5, or the rotor housing 6 can be made of, for example, a hard synthetic resin without being limited to metal.

In the above embodiment, the rotor top 12 is formed by providing a pair of columnar rollers 11 at symmetrical positions of the rotor 5, but as shown in FIG. The top 12 can be formed integrally with the rotor 5. In this case, the operation as the pump is the same as described above, but if the radius of the lower rotation side of the rotor 5 is moderated, the contact of the rotor top 12 becomes smooth as shown in FIGS. A low-noise pump can be realized with almost no hitting sound. Further, since the impact on the elastic sealing material 13 is reduced, even if the rotation of the rotor 5 is accelerated, the damage to the elastic sealing material 13 is reduced, and the durability can be improved. It is needless to say that the number of rotor tops 12 can be three or four or more as shown in FIG. In each of the above-described embodiments, an example in which the disk-shaped rotor 5 is provided on the rotor rotation shaft has been described. However, the present invention is not limited thereto, and an arm-shaped (for example, arm-shaped or branch-shaped) rotor may be used. May be provided on the rotor rotation shaft, and the rotor top may be formed at a portion far from the axis of the rotor rotation shaft.

Further, a fixing member 14 for fixing a part of the elastic sealing material 13 to the upper end portion of the rotor housing portion 8 is replaced with a bolt 17 and a nut 18 for fixing the elastic sealing material, as shown in FIGS.
As a matter of course, as shown in FIG. 5, it is of course possible to mount it with a rod 21 fixed between the side plates 7 and 7. In that case, the elastic sealing material 13
Can be easily attached and detached or replaced. in addition,
Although not shown, the elastic sealing member 13 is not limited to an annular member, and both ends of an inexpensive strip-shaped material may be fixed by the fixing member 14 including a bolt 17 and an elastic sealing member fixing nut 18. can do. Further, in the above-described embodiment, the suction port 9 and the discharge port 10 are provided in the rotor housing 6, but one or both of the suction port 9 and the discharge port 10 are provided on the side plates 7, 7.
Can also be provided. The rotation direction of the rotor 5 is not limited to the direction shown in the figures (counterclockwise), and may be reversed in the direction opposite to the direction shown. In that case, the fluid 20 is sucked in from the discharge port 10 shown in FIG.
Can be discharged.

[0019]

As described above, in the feed pump according to the present invention, the elastic sealing material is interposed between the rotor accommodating portion of the pump casing and the rotor accommodated in the same. By moving the rotor storage section from the suction port to the discharge port in a state where the top of the rotor storage section and the peripheral wall of the rotor storage section are air-tight, the fluid such as gas or liquid sucked from the suction port is moved to the discharge port. Is discharged from the nozzle. As a result, there is no part that is folded back and crushed like a tube that moves while crushing the tube at the crushing part as in the above-mentioned conventional tube pump. There is an advantage that performance can be greatly improved.

Further, since the elastic sealing material has higher durability than the tube, the elastic sealing material does not need to be replaced frequently, and the feed pump can be operated continuously by that amount.
There is also an advantage that operation efficiency can be improved.

Further, the elastic sealing material may be simple and inexpensive, for example, in the form of a belt, and the initial cost and running cost can be greatly reduced as compared with an expensive tube in which a reinforcing material is inserted inside. There are advantages.

[Brief description of the drawings]

FIG. 1 is a side view of a feed pump according to the present invention.

FIG. 2 is a vertical sectional front view of a feed pump according to the present invention.

FIG. 3 is a front view, an exploded view and a sectional view of a rotor of the feed pump according to the present invention.

FIG. 4 is a front view and a vertical sectional side view of an elastic sealing material of the feed pump according to the present invention.

FIG. 5 is an explanatory diagram of an operation of the feed pump according to the present invention.

FIG. 6 is an explanatory diagram of an operation of the feed pump according to the present invention.

FIG. 7 is an operation explanatory view of the feed pump according to the present invention.

FIG. 8 is a front view of a modified example of the rotor of the feed pump according to the present invention.

FIG. 9 is a vertical sectional front view of a modified example of the rotor of the feed pump according to the present invention.

FIG. 10 is an operation explanatory view of a modified example of the rotor of the feed pump according to the present invention.

FIG. 11 is an operation explanatory view of a modified example of the rotor of the feed pump according to the present invention.

FIG. 12 is an operation explanatory view of a modified example of the rotor of the feed pump according to the present invention.

FIG. 13 is a front view showing still another modified example of the rotor of the feed pump according to the present invention.

FIG. 14 is a vertical sectional side view of a main part showing a modification of a portion for fixing an elastic sealing material of the rotor of the feed pump according to the present invention.

FIG. 15 is a perspective view of a main part showing a modification of a portion for fixing an elastic sealing material of the rotor of the feed pump according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Feeding pump 2 ... Pump casing 5 ... Rotor 6 ... Rotor housing 7 ... Side plate 8 ... Rotor storage part 9 ... Suction port 10 ... Discharge port 11 ... Roller 12 ... Top of rotor 13 ... Elastic sealing material 14 ... Fixing device 19 ... Peripheral wall

Claims (8)

[Claims] A pump casing, a rotor accommodated in a rotor accommodating portion of the pump casing, and an elastic sealing material interposed between a peripheral wall of the rotor accommodating portion and a top of the rotor. A part is attached to the pump casing outside the rotation trajectory at the top of the rotor, and a suction port is provided in the pump casing on the lower side in the rotation direction of the rotor with the attachment portion of the elastic sealing material interposed therebetween, and the pump casing on the upper side in the rotation direction of the rotor is provided. A feed pump characterized by having a discharge port opened in each case. 2. The feed pump according to claim 1, wherein the pump casing is formed by a rotor housing in which a rotor housing portion is formed and a side plate that closes a side opening of the rotor housing. 3. The feed pump according to claim 2, wherein at least one of a suction port and a discharge port is formed in the rotor housing. 4. The feed pump according to claim 1, wherein the elastic sealing material is formed in an annular shape, and a part thereof is attached to the pump casing. 5. An elastic sealing material comprising a band-shaped material, the ends of the band-shaped material being overlapped, and the end of the overlapped band-shaped material being fixed to a pump casing by a fixture. Item 2. A feed pump according to Item 1. 6. A rotor is formed in a disk shape, and the rotor is disposed concentrically in a rotor storage portion, and a member rotatable by the disk-shaped rotor partially projects from the peripheral surface of the disk. 2. The rotor according to claim 1, wherein the rotor is provided in a state where the top of the rotor is formed.
The feed pump according to 1. 7. The rotor according to claim 1, wherein the rotor is formed in a disk shape, the rotor is disposed concentrically in the rotor storage portion, and a portion of the disk is formed so as to protrude to form a top portion of the rotor. Item 1
The feed pump according to 1. 8. A rotating shaft of a rotor is provided concentrically in a rotor housing portion, and a disk or arm-shaped rotor is provided on the rotating shaft, and a top of the rotor is located at a portion far away from the axis of the rotating shaft. The feed pump according to claim 1, wherein the feed pump is formed.