JPH0828726A - Device for stopping turn of valve element of multiple way valve - Google Patents

Abstract

PURPOSE:To stop a valve element reaching a fixed position with a simple structure by mounting a cam body to a support shaft of the valve element to shut off the current supply to a motor and stop the turn of the valve element when a sensor claw of a limit switch engages a recess on the cam body. CONSTITUTION:A five way valve M as a multiple way valve has a valve element B of synthetic resin material having the inside partitioned by a partition wall and pivotably received in a casing A of synthetic resin material formed in five ways with flow paths communicating to the outside. A support shaft 29 is erected on the center part of the partition wall. While the support shaft 29 is connected to the output shaft of a motor C, a cam body 30 formed on the three vertical stages respectively with recesses alpha, beta, gamma is provided on the peripheral wall of the support shaft 29. Limit switches 31-33 having sensor claws 34-36 overlaid on three stages are provided in positions of a casing A facing the cam body 30 so that the valve element B is automatically stopped at a fixed rotary angle position by the combination of these limit switches 31-33 and cam body 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body rotation stopping device for a multi-way valve.

[0002]

2. Description of the Related Art Conventionally, for example, in a circulating bath or the like, hot water is caused to flow through a circulation flow path, and the hot water is heated, sterilized, and filtered by a heating device, a sterilizing device, or a filtering device provided in the middle of the circulation flow path. Some of them have a function, but in these bathtubs,
In order to wash the filter material of the filtering device, the circulation flow path is back-flowed and back-washed, and then the flow path is washed again and drained, and the flow path is switched.

In order to switch between these flow paths, a multi-way valve is provided at the beginning of the circulation flow path, and the motor operates the multi-way valve to obtain a desired flow path.

[0004]

However, when the multi-way valve is rotated, the motor is stopped and the motor is stopped and the flow path is switched after the multi-way valve has been rotated, and filtration, backwashing, and subsequent washing are performed. Although it is performed, various techniques are conceivable for controlling at which position the motor is stopped in order to perform switching for filtering, backwashing, washing, and the like.

However, all of them require a complicated structure such as a method of controlling the rotation angle of the motor and a stop control of the motor by sensing the rotation angle of the valve body support shaft, which is disadvantageous in terms of cost. there were.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a cam body is provided on a support shaft of a valve body of a multi-way valve connected to an output shaft of an electric motor, the cam body having a plurality of recesses vertically offset from each other. A plurality of limit switches with protruding sensor claws are stacked at a position facing the cam body, and it is configured to stop the energization of the motor by turning on each limit switch. Moreover, each sensor claw of each limit switch is It is intended to provide a valve body rotation stopping device of a multi-way valve configured to detect each recess.

[0007]

According to the present invention, the electric motor is energized by the separately provided operation portion to rotate the output shaft to rotate the valve body of the multi-way valve via the support shaft, thereby switching the flow path by the multi-way valve. However, after the valve body switches the flow path, it must operate to stop at that position.

Therefore, when the support shaft rotates, the cam body also rotates, and when the sensor claw of the limit switch engages with the recess provided in the cam body, the limit switch is turned on to stop the energization of the electric motor.

When the electric motor is stopped, the valve body is also stopped and the switched flow path is retained.

Therefore, by making the position of each recess of the cam body correspond to each stop position of the valve body, if the sensor claw engages with the recess, the valve body will stop at a certain position at that time. It will be.

[0011]

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

As shown in FIG. 4, a five-way valve M, which is a multi-way valve, has a casing A made of a synthetic resin material in which an external flow passage is formed on five sides, and a casing A rotatably housed therein. It is mainly composed of a synthetic resin material valve body B partitioned by a partition wall 16 'and an electric motor C connected to a support shaft 29 of the valve body B.

As shown in FIG. 4, the casing A is composed of a cylindrical valve case 1 and a holding case 3 which is continuously provided on the lower surface of the valve case 1 so as to form a holding space 2 for holding a fluid. In the center of the water inlet 4 that communicates with the holding space 2
A water inlet pipe 5 is provided on the outer peripheral wall of the valve case 1, and the first communication port 6, the second communication port 7, the third communication port 8, and the fourth communication port 9 are provided in a substantially right angle direction. Is opened, and communication pipes 10, 11, 12, 13 are connected to each of the ports.

The communication pipes 10, 11, 12 and 13 provided at the respective communication ports 6, 7, 8 and 9 are elbow-shaped in a substantially L shape, and are invertedly mounted around the base end portion connected to the valve case 1 as a center. Is configured to be possible.

A valve body B is rotatably accommodated in the valve case 1, the outer peripheral sliding surface of the valve body B is formed in a curved shape, and the inner peripheral surface of the valve case 1 is also concave accordingly. It is formed in a curved surface, and the valve element B has a function of switching the flow path of the fluid from the water inlet 4 while rotating in the cylindrical valve case 1 having an inner circumference of a concave curved surface. , The valve body B is a cylindrical valve wall 16 having an upper surface closed and a partition wall 1 inside thereof.
It is formed by 6'and.

As shown in FIG. 12, the inside of the valve wall 16 is divided into three chambers by a partition wall 16 ', and the partition wall 16' extends radially from the center in three directions, and its tip end is a valve of the valve body B. It is joined to the inside of the wall 16 and is the first of the three chambers formed by the partition 16 '.
The chamber 17 is formed by a partition having an angle of about 90 degrees, and the other second chamber
The 18th and 3rd chamber 19 is formed by the partition of an angle of about 135 degrees.

A groove portion 20 is provided in the vertical direction on the outer peripheral surface of the valve body corresponding to the joint portion between the partition wall 16 'and the valve wall 16.
When integrally molding the valve body B of synthetic resin material with a mold,
It is provided at the joint between the split mold and the split mold,
By forming a projecting piece corresponding to the groove at the joint portion of the split mold, the groove 20 is formed at the time of integral molding.

Further, as shown in FIG. 5, a disc-shaped valve lid 21 having a partially cutout is integrally provided on the lower surface of the valve body B, and the lower surface of the valve body B except for the first chamber 17 is provided. It is blocked.

That is, the disc-shaped valve lid 21 is the valve case 1
It is arranged at the boundary between the holding case 3 and the
It is configured to rotate at the same time as the valve body B, and a notch 22 is formed by notching a disk-shaped portion in a fan shape that matches the shape of the first chamber 17.

As shown in FIGS. 5 and 6, the valve wall 16 of the valve element B has two valve openings for each chamber, and the first chamber 17 has the first valve opening. 23, the second valve opening 24, the second chamber 18, the third valve opening 25, the fourth valve opening 26, the third chamber 19, the fifth valve opening 27,
The sixth valve openings 28 are provided respectively.

Then, each of these valve openings is appropriately connected to the first, second, third and fourth communication openings of the valve case 1 by the displacement caused by the rotation of the valve element B, and the water is introduced from the water entrance 4. The flow path of the fluid is switched. Therefore, the flow path from the water inlet 4 passes from the holding space 2 through the cutout portion 22 of the valve lid body 21 and the valve body B.
The first chamber 17 of the valve body B forms a flow path that passes through the first valve port 23 or the second valve port 24 to the required communication port of the valve case 1, and the second chamber 18 and the third chamber of the valve body B are formed. 19 valve openings 25, 26, 27, 28
Is to communicate with each of the communication ports 6, 7, 8, 9 of the valve case 1 as appropriate to form a flow path for suction and discharge.

A supporting shaft 29 is erected at the center of each partition wall 16 ', and the supporting shaft 29 is connected to the output shaft of the electric motor C, as shown in FIGS. As shown in the drawing, a cam body 30 having three recesses α, β, γ formed at three upper and lower positions is provided on the peripheral wall of the support shaft 29, and a casing A is provided at a position facing the cam body 30. The limit switches 31, 32, 33 are arranged in three layers, and the sensor claws 34, 35, 36 of the limit switches 31, 32, 33 are arranged corresponding to the concave portions of the cam body 30, respectively. When the sensor claw comes to the position of the recess, the limit switch integrated with the sensor claw operates to stop the electric motor C. Reference numeral 30 'designates a penetration pin that supports three limit switches 31, 32, 33.

The electric motor C starts its operation by energization by a separately provided operation switch and rotates the valve body B.
When the sensor pawl of the limit switch comes into the concave portion of the cam body 30 after turning by a certain angle, the millit switch is turned off, the electric power to the electric motor C is cut off, and the turning of the valve body B is stopped.

As described above, by combining the limit switch and the cam body, the valve body B is automatically stopped when it rotates by a certain angle, and each valve opening of the valve body B becomes a required communication opening of the valve case 1. It is positioned automatically so that the switching of the flow paths is automatically performed.

Therefore, the positions of the three-stage recesses of the cam body 30 are
The position is determined depending on which valve opening matches which communication opening (this will be described later).

The five-way valve M constructed as described above is used in a so-called 24-hour heat-retaining bath, and the 24-hour heat-retaining bath will be described with reference to the schematic diagram shown in FIG.

The 24-hour heat-insulating bath mainly comprises a bath 100, a heating device 101, a sterilizing device 102, a filtering device 103 and a circulation pump P, and a circulation pipe is provided between them.
The circulation pipe 104 is connected and connected, and a five-way valve M is interposed in the middle of the circulation pipe 104 to switch the hot water from the bath 100 in the circulation passage.

More specifically, the water intake port 108 provided in the water suction pipe 107 for taking out the hot water from the bathtub 100 communicates with the water inlet 4 of the five-way valve M, and supplies the circulating hot water to the bathtub 100. The discharge port 106 provided in the discharge pipe 105 for communicating with the third communication port 8 of the five-way valve M communicates with the first communication port of the five-way valve M.
Between the communication port 6 and the second communication port 7, there is provided a circulation flow path R in which the heating device 101, the sterilization device 102, and the filtration device 103 are connected and communicated with each other. In the fourth communication port 9,
Sewage drainage pipe 109 is connected.

As described above, the bathtub 100 is connected to the circulation flow path R including the heating device 101, the sterilization device 102, the filtration device 103 and the waste water discharge pipe 109 via the five-way valve M. The bath water in the bathtub 100 is heated, sterilized, and filtered while circulating in the circulation flow path R by the circulation pump P provided in the middle of the water supply pipe 107.
It is constructed so that it can be used for a long period of time without having to replace the bath water by sterilization and filtration while maintaining it at an appropriate temperature at all times for 4 hours.

Further, by switching the five-way valve M, the filtration device 103 is backwashed to wash the filter medium, thereby circulating the flow passage R.
In some cases, a backwash flow path Q is formed in which the bath water is discharged in the opposite direction to discharge the wash wastewater from the wastewater discharge pipe 109 (see FIG. 7), and further, another switching of the five-way valve M is performed. In some cases, after backwashing is performed by operation, normal washing is performed to wash away dust and the like accumulated in the backwashing channel Q (see FIG. 8).

Thus, by operating the five-way valve M between the bath 100 and the circulation flow path R, a flow path for heating, sterilizing and filtering the bath water is formed as shown in FIG. (Hereinafter referred to as a filtration channel), a case where a channel for performing backwashing of the filtration device is formed as shown in FIG. 10 (hereinafter referred to as a backwashing channel), and washing after backwashing as shown in FIG. There are three forms for forming a flow path for performing the cleaning (hereinafter referred to as a cleaning flow path).

Next, the operation of the five-way valve M in each flow path will be specifically described as follows.

(I) When forming a filtration channel (see FIG. 6). The valve body B is rotated to connect the first valve opening 23 in the first chamber 17 to the first communication opening 6 of the valve case 1, and the third valve opening 25 of the second chamber 18 to the third communication opening 8. The fourth valve port 26 is communicated with the second communication port 7, respectively.

In this state, when the circulation pump P is operated, the bath water is sent from the water intake port 108 of the bathtub 100 and the water absorption pipe 107 to the water inlet port 4 of the casing A, and from the water inlet port 4 through the holding space 2 to the valve lid body. Water enters the first chamber 17 of the valve body B from the notch 22 of 21 and is sent from the first valve opening 23 to the circulation flow path R through the first communication port 6 to perform heating, sterilization, and filtration. Second communication port 7
From the third valve opening 25 of the second chamber 18 into the bathtub 100 through the third valve opening 25 of the second chamber 18 through the fourth valve opening 26.
It reaches 6 and is supplied to bathtub 100.

This running water path is shown as follows: water intake port 108 → water inlet port 4 → first chamber 17 → first valve port 23 → first communication port 6 → circulation flow path R → second communication port 7 → fourth valve port 26 → 2nd chamber 18 → 3rd valve opening 25
→ Third communication port 8 → Discharge port 106.

(Ii) In the case of forming a backwash channel (see FIG. 7). The valve body B is rotated so that the first valve opening 23 in the first chamber 17 communicates with the second communication opening 7 of the valve case 1 and the second chamber 18
The fourth valve port 26 of the first communication port 6 and the third valve port 25 of the fourth
The communication ports 9 are made to communicate with each other. This running water path is shown as follows: water intake 108 → water inlet 4 → first chamber 17 → first valve opening 23 → second communication port 7 → reverse circulation flow path R → first communication port 6 → second
Fourth valve port 26 of chamber 18 → second chamber 18 → third valve port 25 → fourth communication port 9 → sewage discharge pipe 109 (iii) In the case of forming a cleaning flow path (see FIG. 8). The valve body B is rotated to allow the second valve port 24 in the first chamber 17 to communicate with the first communication port 6 of the valve case 1 and the third chamber 19
5th valve port 27 of the 2nd communicating port 7, and 6th valve port 28 of the 4th
The communication ports 9 are made to communicate with each other. The flow path is shown as follows: Water intake port 108 → Water inlet port 4 → First chamber 17 → Second valve port 24 → First communication port 6 → Circulation flow path R → Second communication port 7 → Fifth of third chamber 19 Valve opening 27 → 3rd chamber 19 → 6th valve opening 28 → 4th communication opening 9 → sewage discharge pipe 109 The five-way valve M operates as described in (i), (ii) and (iii) above. It is a thing.

Here, the operation of the cam body 30 of the five-way valve M in such a 24-hour warm bath will be described. The concave portions α, β, γ formed on the peripheral surface of the cam body 30 are the filtering passages of the circulating bath,
It is provided so as to correspond to the backwash channel and the wash channel. That is, as shown in FIGS. 14 to 16, the recess α is recessed in the uppermost stage, and the valve body B is rotated by operating an operation panel (not shown) to form a filtration flow path. In this case, the recess α and the sensor claw 34 of the uppermost limit switch 31 are engaged with each other after a certain rotation to cut off the power supply to the electric motor C to stop the rotation of the valve body B. Is the state of the filtration channel.

The recess β is recessed in the middle stage,
This is because when the operation panel (not shown) is operated to rotate the valve body B to form a backwash flow path, the recess β and the sensor claw 35 of the middle limit switch 32 are engaged after a certain rotation. Then, the electric power to the electric motor C is cut off to stop the rotation of the valve body B, and this stop position is the state of the backwash flow path.

Further, the concave portion γ is provided at the lowermost stage, and this is operated by operating a control panel (not shown) so as to form a cleaning channel, or automatically after a lapse of a certain time after backwashing. When the valve element B is rotated, the concave portion γ and the sensor claw 36 of the lowermost limit switch 33 are engaged with each other after a constant rotation, so that the electric motor C is rotated.
Is turned off to stop the rotation of the valve element B, and the cleaning flow path is established.

In this way, operations such as filtration, backwashing and washing are performed by the operation panel (not shown). First, when the filtering operation is performed, the valve body B is rotated by the electric motor C. The engagement between the concave portion α of the cam body 30 and the sensor claw 34 causes the valve body B to stop at the position of the filtration channel. In normal circulation, such a filtration flow path is used and functions as a 24-hour heat-retaining bath. And sometimes, when cleaning the filtration device 103,
When the backwash operation is performed on the operation panel, the electric motor C is activated, the valve body B is rotated, the recess 32 of the cam body 30 and the sensor claw 35 are engaged, and the electric motor C is operated at the backwash position of the valve body B. Is stopped and then a washing operation is performed, or when a predetermined required time elapses, the electric motor C is actuated by the washing operation or automatically and the valve body B is rotated to cause the concave portion of the cam body 30. 33 and sensor claw 36
Is engaged and the electric motor C is stopped at the cleaning position of the valve element B.

[0041]

According to the present invention, the cam body is attached to the support shaft of the valve body, and when the sensor claw of the limit switch is engaged with the concave portion of the cam body, the electric motor is de-energized and the valve body Since the rotation is stopped, the valve body that has come to a fixed position can be reliably stopped with a simple structure, and moreover, the concave portions of the cam body are provided in the upper and lower parts, and the limit switch is also correspondingly moved up and down. By stacking a plurality of valves, it is possible to set a plurality of stop positions of the valve element, and it is possible to automatically and easily perform a plurality of flow path switching operations in the multi-way valve.

[Brief description of drawings]

FIG. 1 is an overall front view of a multi-way valve structure of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is an exploded perspective view of the multi-way valve structure of the present invention.

FIG. 6 is a cross-sectional view showing a valve body position in the case of a filtration channel.

FIG. 7 is a transverse cross-sectional view showing a valve body position in the case of a backwash flow channel.

FIG. 8 is a transverse cross-sectional view showing a valve body position in the case of a cleaning channel.

FIG. 9 is an overall schematic diagram of a filtration channel.

FIG. 10 is an overall schematic diagram of a backwash channel.

FIG. 11 is an overall schematic diagram of a cleaning channel.

FIG. 12 is a cross-sectional view of a valve body.

FIG. 13 is a partial cross-sectional explanatory view of a cam body.

14 is a sectional view taken along the line AA of FIG.

FIG. 15 is a sectional view taken along line BB of FIG.

16 is a cross-sectional view taken along the line CC of FIG.

FIG. 17 is an explanatory diagram of a communication pipe.

[Explanation of symbols]

 A casing B valve disc C electric motor M five-way valve 1 valve case 3 holding case 4 water inlet 16 valve wall 16 'bulkhead 20 groove 21 valve lid 23 fitting groove

Claims (1)

[Claims] 1. A cam body formed by vertically arranging a plurality of recesses on a support shaft of a valve body of a multi-way valve connected to an output shaft of an electric motor, and a sensor at a position facing the cam body. Multiple limit switches with protruding claws are stacked, and each limit switch is turned on to stop energizing the motor. Moreover, each sensor claw of each limit switch is configured to detect each recess of the cam body. A valve body rotation stopping device for a multi-way valve.