JPH03111699A - Pump - Google Patents

Abstract

PURPOSE:To obtain a pump in which a changeover means of the pressure feeding direction of a fluid is built in by providing a changeover valve that can be rotated so as for its outer side flow port to be displaced being changed over to two flow ports on a casing side, and by providing a changeover means for it. CONSTITUTION:When a motor M is started after setting a changeover valve 20 so that its intake port 22c is positioned to a flow port 16 formed on a casing 14, a fluid is sucked into a valve chamber 22e from the intake port 22c of the changeover valve 20 through the flow port 16, and enters a chamber 14b of the casing 14 through a flow hole 22d and a rotating vane 25, and is discharged from a flow port 17. A changeover shaft 24 is then rotated by a changeover means 24a, so as to rotate the changeover valve 20 to rotatively change over its opening port 22c to the other flow port 17 formed on the casing 14. When the motor M is started and a rotating vane 25 is rotated in the same direction, the fluid is sucked from the intake port 22c of the changeover valve 20 through the flow port 17 into the valve chamber 22e, and enters the chamber 14b of the casing 14 through the flow hole 22d and the rotating vane 25, and is discharged from the flow port 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pump, and more particularly to a pump incorporating a switching valve.

[Prior art]

Conventionally, as a dye liquid circulation pump l in a cheese dyeing machine as shown in FIG. 8, a spiral pump has been used which pumps the dye liquid only in the direction indicated by the arrow. Therefore, by providing a switching valve 3 at the bottom of the dye tank 2 and switching it between the solid line state and the broken line state shown in the figure, the dye liquid flowing in the direction A from the pump 1 is directed to the dyed object 4 from the inside. The flow is converted into a flow A to the outside and a flow B from the outside to the inside. In addition, when the air introduction valve 6 is opened and compressed air is circulated from the outside to the inside of the object 4 for air dehydration, the air is sealed so that the air and moisture do not pass through the heat exchanger 5, which has a large resistance. A valve 8 is provided and operated in a sealed manner, and air and moisture are discharged from the air dehydration valve 7.

[Problem to be solved by the invention]

If the switching valve 3 is provided at the lower part of the dyeing tank of the dyeing machine as in the conventional method, there are problems in that the dyeing tank becomes large and the manufacturing of the dyeing tank becomes troublesome. Furthermore, in order to provide an air dehydration function, it is necessary to independently provide a sealing valve 8 for air dehydration and a mechanism for controlling the opening and closing of the air dehydration valve 8, which poses problems such as the need for installation space and high manufacturing costs.

Therefore, the present invention proposes a pump with a built-in switching valve that can switch the direction of fluid pumping between forward and reverse. In addition, this switching valve also has the function of a shut-off valve, so that, for example, the above-mentioned dyeing machine with an air dehydrator does not need a shut-off valve. is also the purpose.

[Means to solve the problem]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention includes a rotary vane in a casing, and a method for sending fluid from a suction part at the center of rotation to an outer peripheral part of the rotary vane by rotation of the rotary vane. In the rotary pump, two flow ports are opened in a casing surrounding the outer periphery of the rotary vane, spaced apart in the circumferential direction, and an inner flow port is provided in the center of the casing and communicates with the suction portion of the rotary vane. and a switching valve having a valve chamber having an outer flow port formed in the outer periphery that communicates with one of the flow ports on the casing side, the outer flow port being selectively connected to the two flow ports on the casing side. The switching valve is provided rotatably so as to be displaced, and the switching valve is provided with switching means.

In a second aspect of the invention, a valve plate that rotates along the inner surface of the casing as the switching valve rotates is fixedly attached to the switching valve, and the valve plate has an outer flow port of the switching valve that is connected to the flow of the casing. When the switching valve is rotated to a position where the outside flow port does not communicate with the flow port of the casing, the flow port of the casing is blocked. It is characterized by forming a closed non-opening part.

[Effect]

According to the first invention, the outer flow port (2o) of the switching valve (2o)
2c) at one of the flow ports (16) on the casing side and rotate the rotary vane (25), the fluid is sucked in from the one flow port (16), and the fluid is sucked into the outer flow port of the switching valve (20). (22c), valve chamber (22e), inner flow port (22d), rotating blade (25), casing (14)
The liquid flows through the inner chamber (14b) and is discharged from the other circulation port (17). Also, rotate the switching valve (20) to connect the outer flow port (22c) to the other flow port (17) on the casing side.
) and rotate the rotary vane (25), the fluid flows in the opposite direction to the above, and the fluid flows through the flow port (1).
7) and discharged from the flow port (18).

According to the second invention, in addition to being capable of switching between forward and reverse flow as in the first invention, the switching valve (20) is connected to its valve plate (
The non-opening part (26d) of 26) is connected to the flow port (26d) on the casing side.
By rotating it to position 16) or (17), the flow port (16) or (17) can be closed and the flow of fluid can be interrupted.

〔Example〕

Next, a first embodiment of the present invention shown in FIGS. 1 to 3 will be described.

Reference numeral 9 indicates a pump, and the pump base 10 is provided with a bearing 11 for a pump shaft 13. The rear part of the pump shaft 13 protrudes from the rear end of the bearing 11 and connects to the pulley 1.
3a is fixed, and the pulley 13a is rotated by a motor M via a pulley 13b and a belt. 1
2 is a flange fixed to the front part of the pump base 10.

14 is a cylindrical casing, one side plate 14a
is fixed to the flange 12. Casing 1
The other side of 4 is sealed with a lid 15. Casing 14
There are two flow holes 16 and 17 on the outer peripheral wall of the
The openings are spaced apart from each other with a phase of 90' in the circumferential direction. Reference numeral 18.19 indicates a flow path provided in the flow port 16.17. 20 is a switching valve, which is separated from the board 21 by Fi
It consists of 22.

The substrate 21 is formed into a disk whose outer diameter is approximately equal to the inner diameter of the outer circumferential wall of the casing 14, and is rotatably fitted into the other side of the casing 14, and a sealing material 23 is provided on the outer circumferential portion of the substrate 21. It is designed so that it can be rotated while maintaining its sealing properties. Reference numeral 24 denotes a switching shaft fixed to the base Fi, 21, which is located concentrically with the rotating shaft 13 and is rotatably provided at 15. 24a is a switching means such as a motor that selectively rotates the switching shaft 24. The partition plate 22 is formed into a bowl shape as shown in FIG.
is fixed to the inner surface of the substrate 21 in a watertight manner. A suction portion 22b is formed on a part of the outer periphery of the partition plate 22 by expanding the core portion and opening its outer peripheral surface. It is formed in a shape that surrounds one of the flow ports 16 and 17. 23a is a sealing material provided at the tip of the suction portion 22b, which allows the suction portion 22b to rotate while maintaining sealing properties with respect to the casing 14.

A communication hole 22d concentric with the rotating shaft 13 is formed in the center of the gap Fi22. Reference numeral 25 denotes a thinly wound rotary blade fixed to the rotary shaft 13, and a suction portion 25a at the center end thereof is rotatably fitted into the communication hole 22d, and its rotation causes the inside of the valve chamber 22e of the switching valve 20 to be rotated. The fluid is sucked in from the suction portion 25a and fed under pressure into the chamber 14b of the casing 14 outside the switching valve 20.

Next, the operation will be explained.

Now, as shown in FIGS. 1 and 2, when the switching valve 20 is set so that its suction port 22c is located at the flow port 16 formed in the casing 14 and the motor M is started, the rotating blade 20 is The fluid in the flow path within one day is sucked into the valve chamber 22e from the suction port 22c of the switching valve 20 through the flow port 16, enters the chamber 14b of the casing 14 through the flow hole 22a1 and the rotating blade 25, and flows through the flow port I7. It is discharged from the flow path 19. Therefore, the flow path 18 communicating with the flow port 16 becomes a fluid suction path, and the flow path 19 communicating with the flow port 17 becomes a fluid discharge path.

Next, the switching shaft 24 is rotated by a switching means 24a such as a motor to open the switching valve 20 so that its opening 22c is connected to the casing 1.
4 is rotated to switch to the other flow port 17 formed in FIG. It is sucked into the valve chamber 22e through the port 22c, enters the chamber 14b of the casing 14 through the circulation hole 22a1 and the rotating blade 25, and is discharged from the circulation port 16 into the flow path 1B. Therefore, the flow path 19 becomes a fluid suction path, and the flow path 1B becomes a fluid discharge path.

A case where this pump 9 is used as a dye solution circulation pump of a dyeing machine as shown in FIG. 7 will be explained.

The flow path 18 in the casing 14 of the pump 9 is communicated with the flow path 18a shown in FIG. 7, and the flow path 19 is communicated with the flow path 19a shown in FIG. In this state, when the switching valve 20 in the pump 9 is set to the position shown in FIG. 2 and the motor M is started, the dye liquor flows as shown by the arrow A in FIG.
．． Flow path 2a+ It passes through the carrier 2b and spindle 2C, flows from the inside to the outside of the dyed object 4 as shown by arrow A, flows through the flow paths 2d and 18a, flows into the pump from the flow path 18 of the pump 9, and this circulation Repeat.

Next, when the switching valve 20 in the pump 9 is switched so that its suction port 22 (is located in the flow path 17) and the motor M is started, the dye liquid flows in the direction of arrow B, which is opposite to the above, and the dyeing liquid flows into the object 4. flows from the outside to the inside.

Therefore, if the pump of the present invention is used, the carrier 2b
The flow path 2a that communicates with the flow path 2a may be a simple pipe, and there is no need to provide the switching valve 3 as in the prior art.

Next, a second embodiment of the present invention shown in FIGS. 4 and 5 will be described. In this embodiment, a valve plate 26 is provided on the outer periphery of the switching valve 20. The valve plate 26 is connected to the switching valve 20.
The substrate 21. The valve plate 26 has a cylindrical shape that is installed and fixed over the outer circumferential ends of the partition plate 22 and the other side plate 27, and has a diameter that allows the outer circumferential surface of the valve plate 26 to rotate in close contact with the inner circumferential surface of the casing 14. . As shown in FIG. 5, the valve plate 26 has a suction side opening 26a located at the suction port 22c formed in the partition plate 22 of the switching valve 20. A first discharge side opening portion 26b and a second discharge side opening portion 26c are formed with a phase of 90° on both sides in the circumferential direction around the center. The opening shapes of these three openings 26a, 26b, and 26c are formed in the same shape as the suction port 22c. still,
The rest of the structure is the same as that of the first embodiment, so the same parts are given the same reference numerals and the explanation thereof will be omitted.

In this embodiment, as shown in FIG.
When rotated, the fluid in the flow path 18 flows through the suction side opening 2.
6a, and is discharged into the flow path 19 from the first discharge side opening 26b. Next, the switching valve 20 is rotated 90° clockwise from the state shown in FIG.
6 and start the motor M, the flow path 19
The fluid inside is sucked in through the suction side opening 26a and is discharged into the flow passage 18 through the second discharge side opening 26c.

Also, move the switching valve 20 counterclockwise 90 degrees from the state shown in FIG.
When rotated, the non-opening portion 26d of the valve plate 26 opens into the flow path 19.
The outlet 17 is located at the outlet 17 of the outlet and the outlet 17 is closed.

Therefore, the switching valve 20 also functions as a weekly valve between the flow paths I8 and 19.

The case where the pump of this second embodiment is used in a dyeing machine with an air dehydrator as shown in FIG. 7 will be explained. In FIG. 7, 6 is an air introduction valve, and 28 is an air dewatering valve. First, for forward and reverse flow of dye liquor, the suction port 22c of the switching valve 20 in the pump 9 is connected to the flow port 17 as described above.
This is done by switching to and 18. Next, the work of dehydrating the dyed object 4 with air is performed by rotating the switching valve 20 906 times counterclockwise in FIG. Open the valve 6 and open the air dehydration valve 28.
As a result, the compressed air introduced into the dye tank 2 from the air introduction valve 6 leads out the moisture in the dyed object 4 into the spindle 2c, passes through the carrier 2b and the flow path 2d, and exits from the pipe of the air dewatering valve 28. It is discharged. Therefore, if the pump of the present invention is used in a dyeing machine equipped with an air dehydrator, air and moisture can be prevented from flowing into the heat exchanger 5 by switching the switching valve 20 during air dehydration, as shown in FIG. The sealing valve 8 for air dehydration in the conventional dyeing machine shown in Fig. 1 is no longer necessary.

FIG. 6 shows a modification of the flow port 16, 17 of the casing 14, the suction side opening 26a of the valve plate 26, and the first discharge side opening 26b in the second embodiment shown in FIGS. 4 and 5. . That is, with respect to the rotating direction of the valve plate 26, the flow port 1
6 and 17 and the first discharge side opening 26b are formed to have the same length, and the suction side opening 26a is formed longer than the flow port 16. According to this embodiment, in the positional relationship shown in FIG. 6, fluid is sucked in by the amount of the opening area of the communication port 16, and fluid is discharged by the amount of the opening area of the communication port 17. Furthermore, if the valve plate 26 is stopped at a position slightly displaced in the direction C in the drawing from the above-mentioned positional relationship, the flow area opened by the overlapping of the flow port 17 and the first discharge side opening portion 26b becomes larger than the flow area of the flow port 17. It is possible to adjust the discharge flow rate in the decreasing direction. The second discharge side opening portion 26c is also formed in the same manner as the first discharge side opening portion 26b.

Also, 1st. Even if the second discharge side openings 26b, 26c are formed to have the same length as the suction side opening 26a, and the suction side opening 26a is formed to have the same length as the flow port 16.17, the same effect as described above can be obtained. The flow rate can be adjusted.

Note that the shape of the switching valve 20 is formed so as to enclose the rotating blade 25, that is, in FIG. 1, the chamber 14b corresponds to the aforementioned valve chamber 22e, and the valve chamber 22e corresponds to the aforementioned chamber 14b. The valve chamber of the switching valve 22 may be configured such that the fluid is discharged from the inside to the outside.

〔Effect of the invention〕

According to the first invention, it is possible to provide a pump that includes a built-in means for switching the fluid pumping direction. Therefore, if the pump of the present invention is used in a fluid circulation path that requires switching between forward and reverse flow, the amount of space available for installing the switching valve will be greater than when the pump and switching valve are installed separately as in the past. For example, if the pump of the present invention is used in a dyeing machine that requires forward and reverse flow of dye solution, there is no need for a switching valve at the bottom of the dye tank as shown in Figure 8. Therefore, it is easy to manufacture the dye vat and the installation area can be reduced.

Further, since the fluid switching means can be formed by using the casing of the pump and the space within the casing, a pump that also includes the switching means can be formed in a small size.

According to the second invention, it is possible to provide a pump capable of switching the fluid pumping direction and blocking the fluid flow as described above.
Therefore, for example, if the pump of the present invention is used in a dyeing machine equipped with an air dehydrator, the sealing valve for air dehydration, which is installed separately from the pump as in the past, becomes unnecessary, and the installation space and mounting area for the sealing valve become unnecessary. No work is required.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1, and FIG. 3 is a perspective view of a partition plate in a switching valve. Fig. 4 is a side sectional view showing the second embodiment of the present invention, Fig. 5 is a sectional view taken along the line v--■ in Fig. 4, and Fig. 6 is a casing's circulation port, the suction side opening of the switching valve, and the discharge port. It is a figure which shows the opening relationship with a side opening part. FIG. 7 is a diagram showing a dye solution circulation system of a dyeing machine using the pump of the present invention, and FIG. 8 is a diagram showing a dye solution circulation system of a dyeing machine using a conventional pump. 14... Casing, 16.17... Distribution port, 20
...Switching valve, 22c...Suction port, 22d...Flow hole, 22e...Valve chamber, 24a...Switching means, 25.
... Rotating vane, 25a... Suction part, 26... Valve plate, 26b. 26e・・Discharge side opening, 26d・・No opening

Claims (1)

[Scope of Claims] 1. In a centrifugal pump that includes a rotating vane in a casing and sends fluid from a suction portion at the center of rotation to an outer circumference of the rotary vane by rotation of the rotary vane, the outer circumference of the rotary vane Two flow ports are opened in a casing surrounding the casing, spaced apart in the circumferential direction, and within the casing, an inner flow port that communicates with the suction portion of the rotary blade in the center and a flow port on the casing side in the outer periphery. a switching valve having a valve chamber having an outer flow port that communicates with one of the casing ports; A pump characterized in that the switching valve is equipped with a switching means. 2. A valve plate that rotates along the inner surface of the casing when the switching valve rotates is fixed to the switching valve, and the valve plate has an outer flow port of the switching valve that is located at one side of the flow port of the casing. If the switching valve is rotated to a position where the outer flow port does not communicate with the flow port in the casing, there is an opening that communicates with the other flow port in the casing. 2. The pump according to claim 1, further comprising an opening.