JP3585405B2 - Electric valve device and chemical spraying device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric valve device used for a pipe for chemicals and the like, and a chemical spraying device equipped with the electric valve device and mounted on a speed sprayer or the like.
[0002]
[Prior art]
In general, a speed sprayer has a driver's seat disposed at the front of a vehicle body, and a chemical pump and a jet head disposed at the rear of the vehicle body. The jet head is equipped with nozzles grouped into several nozzle groups, and each nozzle receives a supply of a chemical from a chemical pressure pump to spray the chemical. The pipe for the chemical solution pumped by the chemical solution pump is branched into each nozzle group by a water separator having the same number of outlets as the number of nozzle groups. The operation of spraying and stopping the chemical solution can be performed for each nozzle group, and an operating tool for performing the operation is provided in a driver's seat.
[0003]
If the operation tool for spraying and stopping the chemical is a manual cock, the pipes branching to each nozzle group must be pulled from the rear of the vehicle to the driver's seat at the front of the vehicle, so the pipes branching to each nozzle group in the water separator. A method is adopted in which an electric valve device is connected to a position corresponding to the above, and an open / close switch of the electric valve device is provided in the driver's seat as an operating tool for spraying and stopping the chemical solution.
[0004]
The opening and closing of the electric valve device is switched according to the rotational position of a valve element that is rotatable about a rotation axis, and the rotation axis of the valve element is driven by a motor.
[0005]
[Problems to be solved by the invention]
The problems of the conventional electric valve device are as follows.
(A) A motor is connected to the rotary shaft of the valve body, and the valve body cannot be moved manually when it stops operating due to sticking of the valve body.
(B) Since a motor having a rotation speed suitable for the rotation of the valve element is required, a motor including a speed reduction mechanism is used. However, when a plurality of electric valve devices are arranged in a straight line in the water separator. It is not in a form suitable for reducing the thickness of each electric valve device.
[0006]
Further, in the chemical spraying device in the conventional speed sprayer, since the number of motorized valve devices connected to the water separator is equal to the number of nozzle groups, waste occurs in the piping of the unit including the water separator and the motorized valve device. When the size of the nozzle group increases and the number of nozzle groups changes, it is necessary to newly prepare a water separator capable of connecting a branch pipe corresponding thereto.
[0007]
An object of the present invention is to provide an electric valve device and a chemical solution spraying device that overcome the above-mentioned problems.
[0008]
[Means for Solving the Problems]
An electric valve device (10) according to the present invention includes a motor (12) having an output shaft (14) projecting in a direction perpendicular to the longitudinal direction, and a projecting portion of the output shaft (14) aligned with the motor (12) in the longitudinal direction. And a tubular body (20) having a water passage (42) formed therein and being rotatably supported by the tubular body (20) in the same direction as the output shaft (14). A rotating shaft (22) protruding from the rotating shaft (22) and fixed to the rotating shaft (22) while being slidably in contact with the sealing means (34, 36) in the flowing water channel (42) to a rotating position around the rotating shaft (22). A valve body (32) that opens and closes the water passage (42) accordingly, a driving gear (24) detachably fixed to the output shaft (14), and a rotating shaft (24) that engages with the driving gear (24). 22) and a driven gear (26) fixed to the driven gear (22).
[0009]
Since the valve body (32) is fixed to the rotating shaft (22), the valve body (32) is driven by the output shaft (14) of the motor (12) via the driving side gear (24) and the driven side gear (26), and seals. It is slidably rotated with respect to the means (34, 36). The electric valve device (10) opens and closes the water passage (42) in accordance with the rotational position of the valve body (32), and controls the passage of liquid in the water passage (42). When the electric valve device (10) stops operating due to the sticking of the valve body (32) to the sealing means (34, 36), the drive side gear (24) is removed from the output shaft (14) and the driven side gear (24) is removed. The engagement with (26) is released, and the driven gear (26) is manually moved to rotate the valve body (32). Since the motor (12) and the tubular body (20) are arranged in the same longitudinal direction, the dimensions of the electric valve device (10) other than the longitudinal direction are reduced, and the output shaft (14) and the rotating shaft (22). Is externally exposed to the side in the direction in which the motor (12) and the output shaft (14) are juxtaposed, so that the attaching and detaching work of the driving side gear (24) and the manual operation of the driven side gear (26) can be performed. Facilitated.
[0010]
Further, according to the electric valve device (10) of the present invention, the motor (12) includes the worm speed reduction mechanism.
[0011]
The output shaft (14) of the motor (12) is connected to the valve body (32) because it is not necessary to make the reduction ratio of the driving gear (24) and the non-driven gear (26) extremely large. It is desirable to provide a speed reduction mechanism that reduces the speed until the rotation speed approaches a rotation speed suitable for rotation. By providing the motor (12) with the worm speed reduction mechanism, the motor (12) can have the output shaft (14) arranged at a right angle to the longitudinal direction while sufficiently reducing the rotation speed. Thus, the motor (12) does not need to have a complicated speed reduction mechanism, and the dimensions other than the longitudinal direction are reduced, which contributes to the reduction in the dimensions of the electric valve device (10).
[0012]
Further, according to the motor-operated valve device (10) of the present invention, the output shaft (14) rotates by 180 degrees in one action, and the driven gear (26) has twice the number of teeth as the drive gear (24). And the valve element (32) switches the opening and closing of the water channel (42) every 90 degrees of rotation around the rotation axis (22).
[0013]
One action is, for example, an operation when the switch button is pressed once. Since the number of teeth of the driven gear (26) is twice the number of teeth of the driving gear (24), when the output shaft (14) rotates 180 degrees, the rotation shaft (22) rotates 90 degrees. Therefore, each time the switch button is pressed once, the valve element (32) fixed to the rotating shaft (22) rotates in one direction by 90 degrees, and the electric valve device (10) can be sequentially switched between open and closed. Thus, by rotating the valve element (32) in only one direction, the sliding of the valve element (32) with respect to the sealing means (34, 36) is performed smoothly, and the sealing means (34, 36) can be reduced.
[0014]
Further, according to the electric valve device (10) of the present invention, the tubular body (20) communicates with the flowing water channel (42) and is perpendicular to the direction in which the tubular body (20) and the motor (12) are juxtaposed. A connection passage (58) is formed which is open on the side surface.
[0015]
By connecting the openings of the connection passages (58) of the plurality of electric valve devices (10) by the connection pipe (50), a multiple electric valve unit can be obtained. At this time, since the cylindrical body (20) and the motor (12) are arranged in a direction perpendicular to the direction in which the electric valve devices (10) are connected, the plurality of electric valve devices (10) are dimensioned in the connection direction. Connection can be performed in a compact state while suppressing an increase in the number.
[0016]
Chemical spraying apparatus of this invention, the chemical liquid feed pump (80), a plurality of nozzle groups, and connect the connection passage (58) of the electric valve apparatus of claim 1, wherein the number is equal to the nozzle group (10) An electric valve unit (90) connected by a pipe (50) is provided. The electric valve unit (90) receives supply of a chemical from a chemical liquid pressure pump (80) and branches to each electric valve device (10). A branch pipe (88) for branching to each nozzle group is connected to each electric valve device (10).
[0017]
The chemical solution pumped by the chemical solution pump (80) is branched by an electric valve unit (90) into a branch pipe (88) to each nozzle group, and each nozzle group is opened and closed by opening and closing each electric valve device (10). Spraying and stopping of the chemical solution from the nozzle (86) are switched. The motor-operated valve unit (90) is configured to have a function of a water separator by the tubular body (20) and the connection pipe (50) of each motor-operated valve device (10), so that space is saved, and the nozzle is By freely changing the numbers of the motor-operated valve device (10) and the connecting pipe (50) according to the number of groups, it is possible to reduce waste in design.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view schematically showing main elements of the speed sprayer 2. FIG. On the traveling vehicle body of the speed sprayer 2, a driver's seat 70, a chemical tank 71, an engine room 72, a jet head 73, and a blower 74 are arranged in this order from the front side to the rear side. The operator gets on the driver's seat 70 and performs the driving operation and the spraying operation of the speed sprayer 2. The chemical liquid tank 71 stores a chemical liquid for spraying. In the engine room 72, an engine 84, a chemical liquid pump 80, a quadruple electric valve unit 90, and the like are provided. The engine 84 drives the traveling of the speed sprayer 2, drives the chemical liquid pressure pump 80, and drives the blower provided in the blower unit 74. On the jetting head 73, nozzles 86 for spraying a chemical solution are arranged in a fan shape on the left and right sides and above, and each nozzle 86 is grouped into four nozzle groups of lower left, upper left, upper right, and lower right. . The chemical pressure pump 80 sucks the chemical in the chemical tank 71 and pumps the chemical to the nozzle 86. The quadruple electric valve unit 90 is formed by connecting the four electric valve devices 10 by the connection pipe 50, and receives the inflow of the chemical solution pumped from the chemical solution pump 80 via the discharge hose 82, and also controls each electric valve device. The chemical solution is branched by 10. Four branch pipes 88 communicating with each of the lower left, upper left, upper right, and lower right nozzle groups are connected to each electric valve device 10 in the quadruple electric valve unit 90, and the nozzles 86 to which each nozzle group belongs are connected. The opening and closing of each electric valve device 10 can independently switch between spraying and stopping of the chemical solution. An operation panel 76 including four switches 78 is installed in the driver's seat 70. The switches 78 are associated with each other so that the electric valve devices 10 of the quadruple electric valve unit 90 can be opened and closed. I have. The blower unit 74 causes the chemical liquid sprayed from the nozzle 86 to reach a distant place by the blowing of the blower.
[0019]
2, 3, and 4 are a front view, a side view, and a bottom view showing a partial cross section of the electric valve device 10, respectively. In each drawing, for simplicity, two electric valve devices 10 are illustrated in a connected state. In FIG. 3, the nut 27 and the nut 28 are illustrated in a detached state. The motor 12 has a worm speed reduction mechanism inside, and an output shaft 14 of the motor 12 projects in a direction perpendicular to the longitudinal direction of the motor 12. The motor 12 is set by the relay control so that the output shaft 14 rotates 180 degrees and stops each time the switch 78 is operated once. The valve body 18 has a cylindrical body 20 integrally. The stay 16 is fixed to the valve body 18 by a bolt (not shown). The motor 12 has three bolts 21 with the output shaft 14 oriented in a direction perpendicular to the direction in which the cylindrical body 20 and the motor 12 are juxtaposed while aligning the longitudinal direction parallel to the cylindrical body 20 and juxtaposing them. To the stay 16. The dimensions of the cylindrical body 20 and the motor 12 in other directions are smaller than the longitudinal direction, and the dimensions in the thickness direction of the electric valve device 10 (the direction in which the output shaft 14 and the rotating shaft 22 are directed) are also reduced. I have. The rotating shaft 22 is rotatably supported by the tubular body 20 via two O-rings 30. The rotation shaft 22 is orthogonal to the axis of the cylindrical body 20 and protrudes in a direction perpendicular to the direction in which the cylindrical body 20 and the motor 12 are juxtaposed and equal to the direction in which the output shaft 14 protrudes. The driving gear 24 is fixed to the output shaft 14 by a nut 27, and the driven gear 26 is fixed to the rotating shaft 22 by a nut 28 while engaging with the driving gear 24. The gear ratio between the driving gear 24 and the driven gear 26 is set to 1: 2.
[0020]
A flow channel 42 is formed inside the tubular body 20 at the same axis as the tubular body 20. Further, a sealing means 34, a valve body 32, and a sealing means 36 are arranged in the flowing water channel 42 in order from the base end side in the axial direction of the cylindrical body 20 to the front end side. The valve body 32 is fixed to the rotation shaft 22 and is rotatable around the rotation shaft 22. The sealing means 34 and the sealing means 36 are inserted into the flowing water channel 42 from the distal end side of the tubular body 20 and are in sliding contact with the valve body 32. The pressing member 40 is screwed to the cylindrical body 20 at the distal end of the cylindrical body 20, and presses the sealing means 34, the valve body 32, and the sealing means 36 from the distal end side of the cylindrical body 20. Is prevented from coming off toward the tip end in the axial direction. A branch pipe 88 is connected to the holding member 40. A linear perforation 38 orthogonal to the rotary shaft 22 is formed in the valve body 32. When the openings on both ends of the perforation 38 face the flowing water channel 42 due to the rotation of the valve body 32 around the rotating shaft 22, the flowing water channel is formed. When the passage of the liquid inside the perforated hole 42 is permitted and the openings at both ends of the perforations 38 face the inner wall of the tubular body 20 and are located between the sealing means 34 and the sealing means 36 and do not face the flowing water path 42, the flowing water path The passage of the liquid inside 42 is blocked. Permitting and blocking of the passage of the liquid in the flowing water channel 42 is switched every time the valve body 32 rotates around the rotation axis 22 by 90 degrees.
[0021]
A connection passage 58 orthogonal to the water passage 42 is formed at a base end portion of the tubular body 20 in the valve body 18. The connection pipe 50 connects the openings of the connection passages 58 of the adjacent electric valve device 10. The O-ring 52 seals between the valve body 18 and the connection pipe 50. A flange 54 and a hose connection flange 56 are connected to end portions of the connection passage 58 of the electric valve device 10 located at both ends where the connection pipe 50 is not connected, respectively. And the electric valve device 10 at both ends are sealed by O-rings 55 and 53, respectively. The four electric valve devices 10 and the three connection pipes 50 that are alternately arranged are sandwiched by the flange 54 and the hose connection flange 56, and are fixed in this state by the bolts 62 and the nuts 60, and the quadruple electric valve unit 90. Is formed. A discharge hose 82 is connected to the hose connection flange 56.
[0022]
When the chemical solution pump 80 is driven, the chemical solution pump 80 pumps the chemical solution to the hose connection flange 56 via the discharge hose 82. The chemical solution delivered to the hose connection flange 56 passes through the connection passage 58 and the connection pipe 50 and then flows into each of the water passages 42 of the four electric valve devices 10. That is, the quadruple electric valve unit 90 functions as a water separator.
[0023]
In each electric valve device 10, the output shaft 14 of the motor 12 is rotated by 180 degrees by one operation of the corresponding switch 78 and stopped. Since the number of teeth of the driven side gear 26 is twice the number of teeth of the driving side gear 24, the rotating shaft 22 and the valve body 32 fixed thereto are rotated by 90 degrees and stopped. At this stop position, if the drive-side gear 24 and the driven-side gear 26 are engaged so that the opening at both ends of the perforation 38 formed in the valve body 32 faces the water passage 42, When the switch 78 is operated again and the valve body 32 is rotated by 90 degrees and stopped, the openings at both ends of the perforations 38 are located between the sealing means 34 and the sealing means 36 and no longer face the water passage 42 so that the closed position is established. Become. Therefore, each time the switch 78 is operated, the valve 32 rotates in only one direction to switch between opening and closing, and the sliding of the valve 32 with respect to the sealing means 34 and the sealing means 36 becomes smooth.
[0024]
When the valve element 32 is fixed to the sealing means 34 and the sealing means 36 and the valve element 32 stops rotating due to the driving of the motor 12, the nut 27 is removed, the driving gear 24 is removed from the output shaft 14, and the driven gear 24 is removed. The rotation shaft 22 is made rotatable by releasing the engagement of the drive gear 26 with the drive gear 24. Then, the operator grips the driven gear 26 by hand and manually rotates the valve body 32. The nut 27 is located on the side of the motor-operated valve device 10, and the motor-operated valve devices 10 are arranged at intervals by the connecting pipe 50. To loosen the nut 27 is easy.
[Brief description of the drawings]
FIG. 1 is a plan view schematically showing main elements of a speed sprayer.
FIG. 2 is a front view of the electric valve device.
FIG. 3 is a side view of the electric valve device.
FIG. 4 is a bottom view showing a partial cross section of the electric valve device.
[Explanation of symbols]
2 Speed sprayer 10 Electric valve device 12 Motor 14 Output shaft 20 Cylindrical body 22 Rotating shaft 24 Drive side gear 26 Driven side gear 32 Valve body 34 Sealing means 36 Sealing means 42 Flowing water channel 58 Connection passage 80 Chemical liquid pressure pump 86 Nozzle 88 Branch piping 90 Quadruple electric valve unit (Electric valve unit)

Claims (4)

A motor (12) having an output shaft (14) projecting in a direction perpendicular to the longitudinal direction;
A tubular body (20) which is juxtaposed with the motor (12) in a direction perpendicular to the direction in which the output shaft (14) projects while being aligned with the motor (12), and in which a water passage (42) is formed;
A rotating shaft (22) rotatably supported by the cylindrical body (20) and projecting in the same direction as the output shaft (14);
The water passage (42) is fixed to the rotation shaft (22) and is disposed in the water passage (42) in sliding contact with the sealing means (34, 36) in accordance with the rotational position around the rotation shaft (22). ) For opening and closing the valve body;
A drive-side gear (24) detachably fixed to the output shaft (14);
A driven gear (26) engaged with the drive gear (24) and fixed to the rotating shaft (22) ;
A connecting passageway (58) communicating with the water flow passage (42) and opening on a side surface perpendicular to a direction in which the cylindrical body (20) and the motor (12) are juxtaposed with the cylindrical body (20). Is formed . The motor-operated valve device according to claim 1, wherein the motor (12) includes a worm speed reduction mechanism. The output shaft (14) is rotated by 180 degrees in one action, the driven gear (26) has twice the number of teeth as the driving gear (24), and the valve body (32) is rotated by the action. The motor-operated valve device according to claim 1 or 2, wherein opening and closing of the water passage (42) is switched every 90 degrees around the axis (22). The chemical liquid pressure pump (80), a plurality of nozzle groups, and the same number of connection passages (58) of the motor-operated valve device (10) according to any one of claims 1 to 3 as the connection pipes (50). ), The electric valve unit (90) is connected to the electric valve unit (90). The electric valve unit (90) receives the supply of the chemical solution from the chemical solution pressure pump (80) and branches to the electric valve devices (10). And a branch pipe (88) for branching to each of the nozzle groups is connected to each of the electric valve devices (10).

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