WO2011122413A1

WO2011122413A1 - Branched duct construct, and uniaxial eccentric screw pump system

Info

Publication number: WO2011122413A1
Application number: PCT/JP2011/056956
Authority: WO
Inventors: 教晃榊原; 洋平高橋
Original assignee: 兵神装備株式会社
Priority date: 2010-03-29
Filing date: 2011-03-23
Publication date: 2011-10-06
Also published as: CN102893030A; JP5614740B2; CN102893030B; KR101801995B1; JP2011208537A; KR20130029375A

Abstract

Disclosed is a branched duct construct that branches a fluid into a desired number of branches, can dispose the discharge section of each branched duct at a desired position, and can equalize the discharge pressure and discharge quantity at each branched duct. Further disclosed is a uniaxial eccentric screw pump system provided with said branched duct construct. The branched duct (Bn) of the branched duct construct has n relay sections (Rn) so as to correspond to each of n discharge sections (Fn), and has: n systems of introduction-to-relay section ducts (SRn) that connect an introduction section (S) to the relay sections (Rn); and n systems of relay-to-discharge section ducts (RFn) that connect the aforementioned n relay sections (Rn) and discharge sections (Fn). Also, with the branched duct construct, the relay sections (Rn) are disposed at positions corresponding to n points that divide the circumference of an imaginary circle centered around a point on a vertical line passing through the center axis of the introduction section (S), and the branched duct (Bn) is formed in a manner so that the lengths of the n systems of relay-to-discharge section ducts (RFn) are each the same.

Description

Branch channel structure and uniaxial eccentric screw pump system

The present invention relates to a branch flow path structure capable of branching a fluid introduced into an introduction section into a plurality of systems, and a uniaxial eccentric screw pump system including the branch flow path structure.

Conventionally, when a non-conveyed object (fluid) pumped by a uniaxial eccentric screw pump as disclosed in Patent Document 1 below is branched into a plurality of flow paths, a flow path connected to the uniaxial eccentric screw pump is used. Measures such as branching one after another are adopted. In addition, conventionally, by adjusting the branch pressures and the discharge amount in each branch flow path, an adjustment valve, a nozzle, or the like is provided in each branch flow path and a fine adjustment is taken individually.

JP 2008-175199 A

However, when the flow path connected to the uniaxial eccentric screw pump is branched as described above, the number of branches is limited to the nth power of 2 (n = natural number) in order to make the discharge pressure and discharge amount uniform. In other words, there is a problem in that it may not be possible to branch to a desired number of branches. Further, in order to make the arrangement of each branch flow path arbitrary, there is a problem that it becomes more difficult to equalize the discharge pressure and discharge amount of the fluid discharged from each branch flow path. Specifically, there is a problem that complicated adjustment is required, such as adjusting a discharge pressure or a discharge amount by attaching a valve, a nozzle or the like to each branch flow path and finely adjusting them. Therefore, in the prior art, it is extremely difficult to form a branch flow path so that a fluid can be discharged to a desired position with a desired number of branches, and there is a problem that significant restrictions are imposed on the flow path design.

In addition, when measures such as adjusting the discharge pressure or discharge amount by attaching valves and nozzles to each branch flow path and making fine adjustments to these are required, skill is required for fine adjustment of the valves and nozzles described above. However, there has been a problem that it is extremely difficult to achieve uniform discharge pressure and discharge amount.

Therefore, the present invention can branch the fluid discharged from a uniaxial eccentric screw pump or the like into a desired number of branches, and can easily and appropriately arrange the discharge portions of the respective branch flow paths at desired positions. In addition, an object of the present invention is to provide a branch flow passage structure capable of achieving uniform discharge pressure and discharge amount in each branch flow path, and a uniaxial eccentric screw pump system including the branch flow path structure.

The branched flow path structure of the present invention provided to solve the above-described problem is capable of forming a branched flow path for discharging fluid introduced from the introduction portion evenly from the n discharge portions. . In the branch flow path structure of the present invention, n relay portions are provided so as to correspond to the n discharge portions, and there are n systems connecting the introduction portion and the n relay portions. A flow path between the introduction / relay sections; and n channels of flow paths between the relay / discharge sections that connect the n relay sections and the discharge sections corresponding to the relay sections. Further, in the branch flow path structure of the present invention, the relay portion is arranged at a position corresponding to a point where the circumference of a virtual circle centered on one point on a vertical line passing through the axis of the introduction portion is divided into n. The lengths of the flow paths between the n-system relay / discharge sections are the same.

In the branch flow path structure according to the present invention, it is preferable that the relay portion is arranged at a position that divides the circumference of the virtual circle into approximately n equal parts.

The branch flow path structure according to the present invention includes a descending section in which each of the flow paths between the relay and discharge sections can flow a fluid downward, and a horizontal section capable of flowing a fluid in a horizontal direction. A flow path having a bent portion between the horizontal portion and the descending portion, and the sum of the lengths of the horizontal portions related to each inter-relay / discharge portion flow path is the same. It is desirable that the total sum of the lengths of the descending parts related to the flow path between the discharge parts is the same, and the number of the bent parts in the flow path between the relay / discharge parts is the same.

In addition, it is preferable that each relay / discharge portion flow path constituting the branch flow path structure of the present invention has a plurality of bent portions formed in the vertical direction.

The branch flow channel structure of the present invention may be provided with a reduced diameter portion in which the flow channel diameter is reduced in each of the flow paths between the relay and discharge portions.

In the branched flow path structure of the present invention, it is desirable that the flow path diameter in each part constituting each branched flow path is substantially uniform regardless of the branched flow path.

The branch channel structure of the present invention may be configured by stacking plates on which grooves forming the respective branch channels are formed. In the branched flow path structure of the present invention, it is preferable that the cross-sectional shape of the introduction portion is circular or a positive n × a square (a is an arbitrary natural number).

The uniaxial eccentric screw pump system of the present invention includes the above-described branch flow path structure of the present invention and a uniaxial eccentric screw pump, and the fluid discharged from the uniaxial eccentric screw pump is supplied to the branch flow path structure. It can be introduced into the introduction section.

In the branch flow path structure of the present invention, the relay section is provided at a position corresponding to a point where the circumference of a virtual circle centering on one point on the vertical line passing through the axis of the introduction section is divided into n. Further, since there are n channels for introduction / relay units so as to connect the introduction unit and each relay unit, the lengths of the channels for introduction / relay units are uniform for each system. Therefore, in the section from the introduction part to the relay part, the fluid flows in each branch flow path with a substantially uniform pressure and flow rate. Further, in the branch flow path structure of the present invention, the lengths of the n-system relay / discharge section flow paths from the n relay sections to the n discharge sections are uniform. It is possible to make the pressure loss generated by the fluid flowing through the flow path between the discharge sections and the fluid flow rate uniform. Therefore, according to the branch flow path structure of the present invention, it is possible to branch the fluid introduced into the introduction portion into a desired number of branches while making the discharge amount and discharge pressure substantially constant.

In the branched flow path structure of the present invention, it is possible to make the discharge amount and discharge pressure uniform in each discharge section without providing a separate valve or nozzle. Therefore, it is possible to simplify the flow path configuration, and it is possible to minimize the installation work and maintenance work as much as the adjustment of the valves and nozzles described above is unnecessary.

Further, in the branch flow path structure of the present invention, it is sufficient that the length of the flow path between each relay / discharge section is uniform, and no special restriction is imposed on the arrangement thereof. Therefore, according to the branch flow path structure of the present invention, the discharge part of each branch flow path can be arranged at a desired position, and the degree of freedom in designing the flow path becomes extremely high.

According to the branch flow path structure of the present invention, the flow rate of the fluid flowing through the flow path between each introduction / relay section is determined by arranging each relay section at a position that substantially divides the virtual circle concentric with the introduction section. It becomes possible to make the pressure more uniform. Therefore, according to the present invention, it is possible to make the flow rate and discharge pressure of the fluid in each discharge section more uniform.

As described above, the branch flow path structure of the present invention is configured such that each relay / discharge section flow path is a bent flow path having a descending portion and a horizontal portion, and the total length of the horizontal portion and the descending portion The total length is made uniform for each relay / discharge section flow path, and the number of the bent portions in each relay / discharge section flow path is the same, so that each relay / discharge section flow path is It is possible to make the pressure loss generated by the flow of fluid and the flow rate distribution uniform. Therefore, by making each inter-relay / discharge section flow path a flow path having a bent flow path constituting section as described above, it becomes possible to further uniform the flow rate and discharge pressure of the fluid in each discharge section. .

In addition, when each of the flow paths between the relay and discharge portions includes a plurality of bent portions in the vertical direction, the orientation of the horizontal portion located downstream of the bent portions in the fluid flow direction is set to It is possible to face the direction different from the horizontal portion located on the upstream side, and it is possible to increase the degree of freedom of the layout of each discharge portion accordingly.

In addition, the branch flow path structure of the present invention has a substantially uniform flow path diameter of each branch flow path regardless of the branch flow path, thereby substantially reducing the discharge amount and discharge pressure in the discharge section connected to each branch flow path. It is possible to make it uniform. In addition, as described above, in the present invention, when a reduced diameter portion with a reduced flow path diameter is provided in the middle of the flow path between the introduction / relay section and the flow path between the relay / discharge section, or the flow path diameter is increased. When the enlarged diameter part is provided, the flow diameter of the reduced diameter part and the enlarged diameter part is substantially uniform regardless of the branch flow path system, so that the discharge amount and discharge pressure in each branch flow path are substantially uniform. It is possible to Thus, by making the flow path diameter at each part of the branch flow path substantially uniform regardless of the branch flow path system, it becomes possible to achieve substantially uniform flow conditions such as pressure loss caused by the flow of fluid. In addition, the discharge amount and discharge pressure in each discharge unit can be substantially uniformed.

The branch flow path structure of the present invention is such that each branch flow path is formed by superimposing plates with grooves, thereby easily and reliably forming a branch flow path that meets the above-described conditions. It becomes possible to do. Moreover, when it is set as this structure, an assembly, decomposition | disassembly, cleaning, etc. of a branch flow path structure are easy, and it becomes easy to install and maintain a branch flow path structure.

In addition, the branch flow path structure of the present invention is formed from the introduction portion by n systems by forming the introduction portion so that the cross-sectional shape is circular or a positive n × a square (a is an arbitrary natural number). Further, the flow rate and pressure of the fluid flowing into each of the introduction / relay unit flow paths can be made uniform.

The uniaxial eccentric screw pump system of the present invention includes the above-described branch flow path structure of the present invention and a uniaxial eccentric screw pump, and introduces the fluid discharged from the uniaxial eccentric screw pump into the branch flow path structure. Therefore, the fluid supplied from the uniaxial eccentric screw pump can be branched into a desired number of branches, and the discharge portions of the respective branch flow paths can be arranged at desired positions. In the uniaxial eccentric screw pump system of the present invention, it is possible to easily and appropriately equalize the discharge pressure and the discharge amount in each branch flow path.

It is explanatory drawing which shows the uniaxial eccentric screw pump system which concerns on one Embodiment of this invention. (A) is a top view which shows the branch flow-path structure based on one Embodiment of this invention, (b) is this side view. It is a perspective view which shows the structure of the branch flow path formed in the branch flow path structure shown in FIG. It is a perspective view for demonstrating the structure of a branch flow path. It is explanatory drawing explaining the design method of the relay part in the flow path design of a branched flow path, and the path | route between introduction | transduction / intermediate parts. It is explanatory drawing explaining the design method of the horizontal part of the flow path between the relay part and discharge part which connects the relay part and discharge part in the flow path design of a branch flow path. (A), (b) is explanatory drawing which shows the modification of the pipe line which comprises a branch flow path, respectively. (A), (b) is explanatory drawing which shows the modification of an introduction part, respectively.

Subsequently, the uniaxial eccentric screw pump system 1 (hereinafter also simply referred to as “pump system 1”) and the branch flow path structure 50 of the present invention will be described in detail with reference to the drawings. The pump system 1 is configured by a combination of a uniaxial eccentric screw pump 5 and a branch flow path structure 50. The pump system 1 of the present embodiment is characterized by the branch flow path structure 50. Prior to the description of this, the structure of the uniaxial eccentric screw pump 5 will be outlined.

≪About single-shaft eccentric screw pump 5≫
The uniaxial eccentric screw pump 5 is a so-called rotary displacement pump, and is configured such that the stator 10, the rotor 30, the power transmission mechanism 40, and the like are accommodated in the casing 20. As shown in FIG. 2, the stator 10 is a member incorporated in the uniaxial eccentric screw pump 5, and is a cylindrical body having an oval cross-sectional shape and having two female screw-shaped holes. The stator 10 is made of rubber or the like. The type of rubber composing the stator 10 can be appropriately selected according to the type and properties of the object to be transported transferred by the uniaxial eccentric screw pump 5.

The casing 20 is a metallic and cylindrical member, and a first opening 22a is provided in a disc-shaped end stud 20a attached to one end in the longitudinal direction. A second opening 22 b is provided in the outer peripheral portion of the casing 20. The second opening 22 b communicates with the internal space of the casing 20 at the intermediate portion 20 d located at the intermediate portion in the longitudinal direction of the casing 20. The first and

second openings

22a and 22b function as a discharge port and a suction port of the uniaxial eccentric screw pump 5, respectively. The stator 10 described above is housed and fixed in a stator attachment portion 22c provided at a position adjacent to the first opening 22a in the casing 20. The stator 10 is fixed by sandwiching the flange portion 10a at the end portion of the casing 20 by the end stud 20a and attaching and tightening the stay bolt 24 across the end stud 20a and the main body portion of the casing 20.

The rotor 30 is a metal shaft and has a single male thread shape. The rotor 30 is inserted into the stator 10 described above, and can be freely eccentrically rotated inside the stator 10. The rotor 30 is inserted through the through-hole 16 of the stator 10 described above, and the outer peripheral surface of the rotor 30 and the inner peripheral surface of the stator 10 are in contact with each other over the tangent line therebetween. Further, in this state, a fluid conveyance path 32 is formed between the inner peripheral surface of the stator 10 forming the through hole 16 and the outer peripheral surface of the rotor 30.

The fluid conveyance path 32 extends spirally in the longitudinal direction of the stator 10 and the rotor 30, and when the rotor 30 is rotated in the through hole 16 of the stator 10, the longitudinal direction of the stator 10 is rotated while rotating in the stator 10. Go in the direction. Therefore, when the rotor 30 is rotated, fluid is sucked into the fluid conveyance path 32 from one end side of the stator 10, and is transferred toward the other end side of the stator 10 in a state of being confined in the fluid conveyance path 32. It is possible to discharge at the other end side of the stator 10.

The power transmission mechanism 40 is provided for transmitting power from the power source (not shown) such as a motor provided outside the casing 20 to the rotor 30 described above. The power transmission mechanism 40 is capable of transmitting the rotational power transmitted from the power source described above to the rotor 30 and rotating the rotor 30 eccentrically. The uniaxial eccentric screw pump 5 can transport the fluid via the fluid transport path 32 by operating the power source described above and rotating the rotor 30.

<< About the branch channel structure 50 >>
The branch flow path structure 50 is connected to the first opening 22a functioning as a discharge port of the uniaxial eccentric screw pump 5 having the above-described structure. As shown in FIG. 2, the branch channel constituting body 50 is inserted so that metal channel constituting plates P1 to P4 are overlapped in the vertical direction and penetrated between the plates P1 to P4 in the vertical direction. Integrated with bolts. In addition to the introduction part S and n (n is a natural number greater than or equal to 2) discharge parts Fn, the branch flow path structure 50 connects the introduction part S and each of the n discharge parts Fn. A branch flow path Bn of the system is provided, and the fluid introduced into the introduction part S can be branched almost evenly into the n system of branch flow paths Bn and discharged from each of the n discharge parts Fn. Is.

In the flow path constituting plates P1 to P4, in addition to the introduction part S and the n discharge parts Fn described above, grooves for forming n systems of branch flow paths Bn connecting them are formed. Hereinafter, the configuration of the introduction section S, the n discharge sections Fn, and the n-system branch flow paths Bn will be described in more detail.

As shown in FIG. 2 and FIG. 3, the introduction portion S is a substantially circular portion having a cross-sectional shape provided on the flow path configuration plate P <b> 1 disposed at the uppermost position in the branch flow path structure 50. The flow path constituting plate P1 is a disk-shaped metal plate, and the introduction part S is provided at the approximate center of the flow path constituting plate P1. Further, the discharge part Fn is provided on the flow path configuration plate P4 arranged at the lowest position in the branch flow path structure 50. The arrangement and the number (n) of the discharge portions Fn can be arbitrary, but in this embodiment, as shown in FIG. 3, seven discharge portions Fn (n = 1 to 7) are on the straight line L. It is formed to line up.

The branch channel Bn is configured by grooves formed in the channel configuration plates P1 to P4. The branch flow path Bn is formed for n systems corresponding to each of the n discharge sections Fn (n = 1 to 7). That is, the first to nth branch flow paths Bn are formed. In the present embodiment, since seven discharge portions Fn are provided, seven branch channels Bn including the first branch channel B1 to the seventh branch channel B7 are formed.

As shown in FIG. 4, the branch channel Bn (n = 1 to 7) is introduced into each relay unit Rn (n = 1 to 7) provided corresponding to the discharge unit Fn (n = 1 to 7). A relay connecting the introduction / relay unit flow path SRn (n = 1 to 7) connecting the part S and each relay unit Rn (n = 1 to 7) and each discharge unit Fn (n = 1 to 7). It is broadly divided into discharge part flow paths RFn (n = 1 to 7). Each introduction / relay unit flow path SRn (n = 1 to 7) and each relay / discharge section flow path RFn (n = 1 to 7) communicate with each other to form a series of flow paths. Yes.

As shown in FIG. 5, the relay part Rn (n = 1 to 7) is arranged on a virtual circle C1 concentric with the introduction part S described above. Further, the relay unit Rn (n = 1 to 7) is arranged at a position where the circumference of the virtual circle C1 is divided into n (in this embodiment, divided into 7). The relay part Rn (n = 1 to 7) may be arranged so as to divide the circumference of the virtual circle C1 into n parts, but the fluid is substantially evenly distributed to each branch channel Bn (n = 1 to 7). In consideration of supply, it is preferable to arrange the circumference of the virtual circle C1 at a position that divides the circumference of the virtual circle C1 into approximately n equal parts. From this point of view, in the present embodiment, the relay portion Rn (n = 1 to 7) is arranged at a position that divides the circumference of the virtual circle C1 into approximately n equal parts (7 equal parts in the present embodiment). Therefore, each introduction / relay part flow path SRn (n = 1 to 7) is formed radially with the introduction part S as the center.

As shown in FIG. 4, the relay-discharge part flow path RFn (n = 1 to 7) includes a descending part Dnp (n = 1 to 7, p = 1 to 3) and a horizontal part Lnq (n = 1). 7 and q = 1 to 2), and these are bent flow paths formed by communicating them. Specifically, each relay / discharge unit flow path RFn (n = 1 to 7) communicates in the order of the descending part Dn1 → the horizontal part Ln1 → the descending part Dn2 → the horizontal part Ln2 → the descending part Dn3. The flow path is formed so as to be connected to Fn (n = 1 to 7).

In this embodiment, the length of each descending part Dnp and each horizontal part Lnq is substantially the same for each system, and the inner diameter is also substantially the same. For this reason, the total length and the opening diameter of the relay / discharge portion flow path RFn are substantially the same regardless of the system, and the pressure loss caused by the passage of fluid through the inside is also substantially uniform.

≪About design method of branch channel Bn≫
Next, a method for designing the above-described branch channel Bn (n = 1 to 7) will be described. In the branch flow path Bn, the descending portions Dn1, Dn2, Dn3 (n = 1 to 7) are through holes having the same opening diameter formed so as to penetrate the flow path constituting plates P2, P3, P4 in the vertical direction, respectively. Formed by. Therefore, the lengths and opening diameters of the descending portions Dn1, Dn2, Dn3 (n = 1 to 7) are uniform regardless of the system of the branch flow path Bn (n = 1 to 7). Therefore, when the branch flow path B is designed, a portion extending in the horizontal direction, specifically, the introduction / relay section flow path SRn (n = 1 to 7) or the relay / discharge section flow path RFn (n = The arrangement of the horizontal portions Lnq (n = 1 to 7, q = 1 to 2) constituting 1 to 7) becomes a problem. Hereinafter, the design method of the introduction / relay unit flow path SRn (n = 1 to 7) and the horizontal part Lnq (n = 1 to 7, q = 1 to 2) will be mainly described.

The introduction / relay unit flow path SRn (n = 1 to 7) and the horizontal portion Lnq (n = 1 to 7, q = 1 to 2) are introduced into the introduction unit S, the relay unit Rn, and the discharge unit Fn (n = The positional relationship in the horizontal direction of 1 to 7) is determined with reference to a point where these are projected on the virtual horizontal plane H. Specifically, the intersections of the vertical line passing through the axial position of the introduction part S, the relay part Rn, and the discharge part Fn (n = 1 to 7) and the horizontal plane H are respectively the introduction reference point s, the relay reference point rn, It is determined as a discharge reference point fn (see FIG. 4).

Since the introduction / relay unit flow path SRn (n = 1 to 7) is a flow path connecting the introduction part S and the relay part Rn, it is necessary to define the relay part Rn (n = 1 to 7). As shown in FIG. 5, the relay part Rn (n = 1 to 7) defines a virtual circle C1 having a radius r1 around the introduction reference point s set on the horizontal plane H corresponding to the introduction part S, A relay reference point rn corresponding to the relay unit Rn (n = 1 to 7) is set at a position that divides the circumference of the virtual circle C1 into approximately n equal parts. In this embodiment, since it is necessary to form seven branches Bn, the relay reference point rn (n = 1 to 7) is set every 360/7 [degree] on the circumference of the virtual circle C1. The

Here, the horizontal portion Ln1 (n = 1 to 7) is formed between the flow path constituting plates P2 and P3, and is set in the horizontal direction with reference to the position directly below the relay portion Rn (n = 1 to 7). It is an extending flow path. Further, the horizontal portion Ln2 (n = 1 to 7) is formed between the flow path constituting plates P3 and P4 and extends in the horizontal direction with reference to the position immediately above the discharge portion Fn (n = 1 to 7). It is a flow path. Further, the channel length of the horizontal portion Ln1 (n = 1 to 7) needs to be uniform for each system, and the channel length of the horizontal portion Ln2 (n = 1 to 7) is also uniform for each system. There is a need.

Therefore, when designing the horizontal portions Ln1 and Ln2, first, as shown in FIG. 6, the relay reference point rn (n = n) set on the horizontal plane H so as to correspond to the discharge portion Fn (n = 1 to 7). 1 to 7) intersects a virtual circle C2n (n = 1 to 7) with a radius r2 centered on the center and a virtual circle C2n (n = 1 to 7) centered on a discharge reference point fn (n = 1 to 7). A virtual circle C3n (n = 1 to 7) having a radius r3 is set on the horizontal plane H. The intersection of the virtual circle C2n (n = 1 to 7) and the virtual circle C3n (n = 1 to 7) formed thereby is determined as the bending reference point xn (n = 1 to 7).

Specifically, the design method of the first branch flow path B1 will be described as an example. When designing the horizontal portions L11 and L12, the discharge reference point f1 is set at a position corresponding to the discharge portion F1 as shown in FIG. Is done. Further, a virtual circle C21 having a radius r2 centered on the relay reference point r1 assumed in the first branch flow path B1 and a virtual circle C31 having a radius r3 centered on the discharge reference point f1 are set. A horizontal portion L11 is set at a position connecting the intersection point X1 of the virtual circles C21 and C31 and the relay reference point r1, and a horizontal portion L12 is set at a position connecting the intersection point X1 and the discharge reference point f1. Similarly, horizontal portions Ln1 and Ln2 (n = 1 to 7) of the second to seventh branch flow paths B2 to B7 are set.

When the relay reference point rn, the bending reference point xn, and the discharge reference point fn are determined as described above, vertical lines Vrn, Vxn, and Vfn passing through these are set as shown in FIG. Further, a horizontal plane J1 passing between the flow path component plates P1 and P2, a horizontal plane J2 passing between the flow path component plates P2 and P3, and a horizontal plane J3 passing between the flow path component plates P3 and P4 are assumed. The intersection of the vertical line Vrn and the horizontal plane J1 serves as a boundary between the introduction / relay unit flow path SRn (n = 1 to 7) and the descending part Dn1. Further, the intersection of the vertical line Vxn and the horizontal plane J2 becomes the boundary between the horizontal portion Ln1 and the descending portion Dn2, and the intersection of the vertical line Vxn and the horizontal plane J3 becomes the boundary between the descending portion Dn2 and the horizontal portion Ln2. Furthermore, the intersection of the vertical line Vfn and the horizontal plane J3 becomes the boundary between the horizontal portion Ln2 and the descending portion Dn3. Thus, by designing the introduction / intermediate part flow path Srn and the relay / discharge part flow path RFn (n = 1 to 7), the flow path length is the same, and the introduction part S to each discharge part Fn. A series of branch flow paths Bn (n = 1 to 7) connected to can be formed.

As described above, in the branch flow path structure 50 of the present embodiment, n relay references are provided at positions where the circumference of the virtual circle C1 centered on the introduction reference point s concentric with the introduction part S is divided into n. A point rn is set, and a relay unit Rn is provided at a position corresponding to each relay reference point rn on the horizontal plane J1. Further, since the n-system introduction / relay unit flow path SRn is provided so as to connect the introduction section S and each relay section Rn, the length of the introduction / relay section flow path SRn is uniform for each system. It is. For this reason, in the branch flow path structure 50, the fluid introduced from the uniaxial eccentric screw pump 5 to the introduction part S reaches the relay part Rn at a substantially uniform pressure and flow rate with respect to each branch flow path Bn. It can be distributed.

Moreover, in the branch flow path structure 50 of this embodiment, by designing in accordance with the flow path design method as described above, from the n relay sections Rn to the discharge sections Fn provided corresponding thereto. The length of each of the relay-discharge portion flow paths RFn is made uniform. Therefore, in the branch flow path structure 50, it is possible to make the pressure loss and the flow rate of the fluid generated by the fluid flowing through each relay / discharge portion flow path RFn uniform, regardless of the branch flow path Bn. Therefore, according to the branch flow path structure 50, it is possible to branch the fluid introduced into the introduction section S into a desired number of branches while making the discharge amount and discharge pressure substantially constant.

As described above, by using the branch flow path structure 50, the discharge amount and discharge pressure of the fluid in each discharge portion Fn can be made uniform. Therefore, it is not necessary to provide a valve or nozzle for adjusting the discharge amount or discharge pressure in each discharge portion Fn or a flow path separately connected to the discharge portion Fn as in the prior art, and there is no need to adjust the valve or nozzle. . Therefore, if the fluid supplied from the uniaxial eccentric screw pump 5 is branched into a plurality of systems using the above-described branch flow path structure 50, the flow path structure is simplified and the discharge amount and the discharge pressure are adjusted. Is eliminated, and the labor required for maintenance and installation work can be minimized.

The branch flow path structure 50 has the same flow path length between the introduction / relay section flow path SRn and the relay / discharge section flow path RFn regardless of the branch flow path Bn by performing the flow path design as described above. Is possible. Therefore, the branch flow path structure 50 can arrange not only the discharge part Fn on a predetermined straight line as described above, but also can appropriately arrange the discharge part Fn according to the demand, and freedom of layout selection of the discharge part Fn. The degree is extremely high. Further, according to the branch flow path structure 50, the discharge amount and discharge pressure of the fluid in each discharge portion Fn can be made uniform even if the number of the discharge portions Fn is not 2 n as in the prior art. It is possible to adjust the number of ejection portions Fn as appropriate according to demand.

In the branch flow path structure 50 of this embodiment, the sum of the lengths of the descending portions Dnp and the sum of the lengths of the horizontal portions Lnq are the same regardless of the system of the branch flow paths Bn. Further, the branch flow path structure 50 includes the size of each part constituting each branch flow path Bn, specifically, the size of the pipe line constituting the flow path SRn between the introduction / relay part and the flow path RFn between the relay / discharge part. The cross-sectional shapes are substantially the same. Furthermore, the total number of bent portions formed at the boundary between the horizontal portion Lnq and the descending portion Dnp is the same in each branch system Bn. Therefore, the pressure loss caused by the fluid flowing through each relay / discharge portion flow path RFn and the uniform flow distribution are substantially uniform regardless of the branch flow path Bn system, and the amount of fluid discharged from each discharge portion Fn. And the discharge pressure can be made uniform.

The branch flow path Bn shown in the present embodiment exemplifies an example in which the horizontal portion Lnq and the descending portion Dnp are bent without greatly bending at the boundary portion, but the present invention is not limited to this. That is, the branch flow path structure 50 according to the present embodiment is formed by superimposing the flow path configuration plates P1 to P4 in which grooves are formed, so that each branch flow path Bn is configured. Therefore, the horizontal portion Lnq and the descending portion Dnp In the case where each branch passage Bn is formed by bending a pipe of a copper tube, for example, it is more horizontal than that shown in the present embodiment. It must be greatly curved at the boundary portion between the portion Lnq and the descending portion Dnp. Therefore, as shown in FIG. 7A, the branch channel Bn may be one in which the boundary portion is curved with a larger curvature than that shown in the present embodiment.

Even when the boundary portion is largely curved as described above, the branch flow path Bn has the substantially same flow path length as a whole regardless of the system, and the sum of the lengths of the descending portions Dnp regardless of the system. Are the same, the total sum of the lengths of the horizontal portions Lnq is the same, and the flow paths must be designed so that the number of bent portions is the same. As long as these conditions are satisfied, it is possible to make the discharge pressure and discharge amount of the fluid in each discharge portion Fn substantially uniform, similar to those exemplified in the present embodiment.

In the branch flow path structure 50, each of the relay / discharge section flow paths RFn includes a bent portion, and the horizontal portion Lnq on the downstream side is located upstream of the bent portion (above the bent portion). Can be directed in a direction different from the horizontal portion Lnq. In addition, the relay / discharge portion flow path RFn is configured to include bent portions at a plurality of locations in the vertical direction. Therefore, the branch flow path structure 50 can reach each relay / discharge section flow path RFn to an arbitrary position in the horizontal direction according to the layout of each discharge section Fn. High degree.

In the branch flow path structure 50 shown in the present embodiment, the opening diameter of the flow path constituting each branch flow path Bn is uniform regardless of the part, but the present invention is not limited to this. Alternatively, it is also possible to adopt a configuration in which the part (reduced diameter part 60) in which the opening diameter of the flow path is reduced as shown in FIG. is there. Conversely, each branch channel Bn can be provided with a portion (diameter enlarged portion) in which the channel diameter is larger than other portions. Furthermore, it is also possible to provide a part where the cross-sectional shape of the flow path is different from other parts as one of the parts constituting each branch flow path Bn. In addition, when providing the site | parts from which the flow path diameters and cross-sectional shape different from others, such as the diameter reducing part 60 mentioned above, in order to aim at equalization of the pressure loss generated by the fluid flowing in each branch flow path Bn, the fluid flow rate, etc. It is desirable to provide a portion such as the reduced diameter portion 60 at the same position in each branch channel Bn. Further, it is desirable that the channel diameter and the channel cross-sectional area of a portion such as the reduced diameter portion 60 provided in each branch channel Bn are substantially uniform regardless of the system of the branch channel Bn. In this way, even when the reduced diameter portion 60 is provided, it is possible to further uniform the balance of pressure loss and fluid flow rate in each branch flow path Bn, and fluid in each discharge portion Fn. It is possible to prevent variations in the discharge amount and discharge pressure.

Since the branch channel constituting body 50 is such that each branch channel Bn is formed by overlapping the channel constituting plates P1 to P4 in which grooves are formed, the branch channel designed by the above-described design method. It is possible to form Bn easily and accurately. In the present embodiment, the example in which each branch channel Bn is configured by overlapping the channel configuration plates P1 to P4 is illustrated, but the present invention is not limited to this, and a metal tube or a resin tube is used. The above-described branch flow path Bn may be formed by appropriately bending or the like. Further, the branch flow path structure 50 may be configured by a plurality of types of common parts, and the branch flow path Bn having a desired arrangement and shape may be formed by appropriately combining the common parts. . Further, the branch flow path structure 50 is configured by connecting a part constituting the introduction / relay part flow path SRn and a part constituting the relay / discharge part pipe flow path RFn as separate parts. Thus, each branch channel Bn may be configured. Further, for example, a part that constitutes the descending part Dnp and a part that constitutes the horizontal part Lnq are separately prepared, and the relay / discharge part pipe flow path RFn may be configured by appropriately connecting them.

Since the branch channel structure 50 shown in the present embodiment is formed by bending each branch channel Bn at a position corresponding to the horizontal planes J1 to J3 assumed at the boundaries of the channel configuration plates P1 to P4. Each branch flow path Bn is bent at the same height, but the present invention is not limited to this, as long as the total length of each branch flow path Bn is the same, Each branch channel Bn may be bent at different heights. When each branch flow path Bn is bent at different heights, interference between the branch flow paths Bn can be easily avoided, and the layout of each branch flow path Bn and each discharge portion Fn can be further improved. It becomes possible to increase the degree of freedom.

In the present embodiment, each branch channel Bn connected to the introduction part S forms a series of channels without branching in the middle, but the present invention is not limited to this, and each branch The flow paths Bn may be formed so as to further branch into multiple systems on the way. In addition, when branching each branch flow path Bn on the way, it is desirable to make the number of branches the same for each branch flow path Bn. In addition, also when each branch channel Bn is branched in the middle, by designing the channel according to the above-described channel design method, the pressure loss and the flow rate generated by the flow of fluid are made uniform, and each discharge unit Fn It is possible to make the discharge pressure and discharge amount of the fluid uniform.

In the branch flow path structure 50 of this embodiment, the cross-sectional shape of the introduction part S is circular and each branch flow path Bn is connected at substantially equal intervals in the circumferential direction. The fluid introduced into S can be supplied substantially uniformly to each branch channel Bn. The introduction portion S is not limited to a circular cross-sectional shape, and may have a polygonal cross-sectional shape. However, when the fluid is supplied substantially uniformly to each branch channel Bn. From this point of view, it is preferable that the cross-sectional shape is a substantially positive n-gon or a substantially positive n × a square (a is a natural number). Specifically, for example, when three discharge parts Fn are provided and three branch flow paths Bn are formed, the cross-sectional shape of the introduction part S is an equilateral triangle as shown in FIG. As shown in FIG. 8B, a regular hexagon (n = 3, a = 2, nxa = 6) can be used. By adjusting the shape of the introduction part S in this way, the fluid introduced into the introduction part S from the uniaxial eccentric screw pump 5 side can be supplied to the angular branch flow path Bn substantially uniformly.

In this embodiment, the introduction / intermediate portion flow path SRn has only a portion extending in the horizontal direction, but the present invention may be limited to this, and the relay / discharge section flow path It may have a portion extending in the vertical direction (vertical direction) like the descending portion Dnp of RFn. Also in the case of such a configuration, the relay part Rn and the introduction part S provided at the position where the circumference of the virtual circle C1 is divided into n are connected, as described in the method for designing the branch flow path Bn. As described above, by designing the flow paths SRn between the introduction / intermediate sections, it becomes possible to supply the fluid from the introduction section S to the branch flow paths Bn substantially uniformly.

In the present embodiment, the example in which the uniaxial eccentric screw pump system 1 is configured by combining the branch flow path structure 50 with the uniaxial eccentric screw pump 5 is illustrated, but the present invention is not limited to this, and the branch flow The path structure 50 may be used in combination with a conventionally known pump other than the uniaxial eccentric screw pump 5.

DESCRIPTION OF SYMBOLS 1 Uniaxial eccentric screw pump system 5 Uniaxial eccentric screw pump 50 Branch flow path structure 60 Reduced diameter part Pn Flow path structure plate S Introduction part Fn Discharge part Bn Branch flow path Rn Relay part SRn Introduction / relay part flow path RFn Discharge part flow path Dnp Lower part Lnq Horizontal part s Introduction reference point rn Relay reference point fn Discharge reference point H Horizontal plane V Vertical line

Claims

A branch flow path structure capable of configuring a branch flow path for discharging fluid introduced from the introduction section uniformly from the n discharge sections,
N relay portions are provided so as to correspond to each of the n discharge portions,
Each branch channel is
N system introduction / relay unit flow paths connecting the introduction unit and the n relay units;
Having n channels of relay / discharge unit channels connecting the n relay units and the discharge units corresponding to the relay units,
The relay unit is arranged at a position corresponding to a point that divides the circumference of a virtual circle centered on one point on a vertical line passing through the axis of the introduction unit into n parts,
The length of the flow path between the n systems of the relay / discharge sections is the same.
The branch flow path structure according to claim 1, wherein the relay section is arranged at a position that divides the circumference of the virtual circle into approximately n equal parts.
Each of the flow paths between the relay / discharge sections includes a descending portion capable of causing fluid to flow downward, and a horizontal portion capable of causing fluid to flow in a horizontal direction, and the horizontal portion and the descending portion. A flow path having a bent portion between the portion and
The sum of the lengths of the horizontal portions related to the flow paths between the relay and discharge portions is the same,
The total sum of the lengths of the descending portions related to the flow paths between the relay and discharge portions is the same,
3. The branch flow path structure according to claim 1, wherein the number of the bent portions in each relay / discharge section flow path is the same.
The branch flow path structure according to claim 3, wherein each of the flow paths between the relay / discharge sections has a plurality of bent portions formed in the vertical direction.
The branch flow path structure according to any one of claims 1 to 4, wherein each of the flow paths between the relays and the discharge sections is provided with a reduced diameter portion having a reduced flow path diameter.
6. The branch channel structure according to claim 1, wherein the channel diameter of each branch channel is substantially uniform regardless of the branch channel.
The branch flow path structure according to any one of claims 1 to 6, wherein the branch flow path structure is configured by superposing plates on which grooves forming the respective branch flow paths are formed.
The branch channel structure according to any one of claims 1 to 7, wherein a cross-sectional shape of the introduction portion is a circle or a regular n × a square (a is an arbitrary natural number).
A branch channel structure according to any one of claims 1 to 8 and a uniaxial eccentric screw pump,
A uniaxial eccentric screw pump system characterized in that fluid discharged from the uniaxial eccentric screw pump can be introduced into an introduction portion of the branch flow path structure.