JPH0444027Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a valve provided in a nozzle for injecting liquid such as liquid fertilizer or disinfectant into soil or the like.

[Prior Art] In a conventional valve of this type, as shown in FIGS. 6 and 7, for example, a valve body d can be seated on a valve seat c disposed in a valve box b below a valve body a. and the valve body d
is connected to an operating lever i that is pivotably supported on the valve body a through a valve stem e, a double nut f, an actuating plate g and a pin h that slide vertically on the valve body a, and is operated. The valve body d is opened and closed by the reciprocating swing operation of the lever i. Note that j indicates an entrance and k indicates an exit.

[Problem to be solved by the invention] However, in the conventional valve, when the operating lever i is swung upward in the drawing against the pressing means m, the actuating plate g is swung upward via the pin h. When the operating lever i is swung downward by the pressing means m, the valve body d is closed. Therefore, the discharge amount from the outlet k changes depending on the upward swinging time of the control lever i, and it is difficult to maintain a constant discharge amount even when the control lever i is swung up and down multiple times. It is.

[Means for Solving the Problems] This invention was devised in view of the above-mentioned circumstances, in which a valve body is disposed so as to be able to sit on a valve seat formed in a valve box of a valve body, and the valve body is A valve that locks an operating lever that is pivotally supported through a support shaft, and that allows the valve body to be opened and closed by swinging the operating lever, the valve body having a valve body that is attached to the valve body in substantially the same direction as the movement direction of the valve body. An actuating plate is disposed to be slidable in the sliding direction, and a first elongated hole is formed in the actuating plate, the actuating plate having a parallel portion extending substantially in the sliding direction and a perpendicular portion extending in a direction substantially orthogonal to the sliding direction. A second elongated hole extending substantially radially from the support shaft is formed in the operating lever, and the actuating plate and the operating lever are connected to each other through pins slidably engaged with both of the elongated holes. the pin is engaged, and the pin is moved to the first position by swinging the operating lever in one direction.
When the pin is locked in the orthogonal part of the first elongated hole, the valve element is opened via the actuating plate, and when the pin is engaged in the parallel part of the first elongated hole, the valve element is pressed. This paper proposes a valve that is closed by

[Operation] In the valve of this invention having the above configuration,
By swinging the control lever in one direction at a constant speed, the valve body is opened for a certain period of time and then closed, thereby maintaining a constant discharge amount.

[Example] An example of this invention will be described below based on the accompanying drawings.

Figures 1 and 2 are partially cutaway side and rear views showing a first embodiment of the valve according to this invention. is the entrance 2 located above in the drawing.
A passage 4 communicating from the outlet 3 to the outlet 3 below is formed, and a valve box 5 is formed in the passage 4 above the outlet 3.

A valve seat member 7 in which a valve seat 6 is formed is arranged in the valve box 5, and a valve body 9 that is pressed in the direction of the valve seat 6 by a pressing means 8 such as a spring is attached to the valve seat 6. 6 so that it can be seated. The valve body 9 is the valve stem 1
0, and the upper end of the actuating plate 12, which is slid in the vertical passage 4 of the valve body 1 and has a U-shaped cross section, is connected to the upper end of the valve rod 10, which is inserted through the passage 4. They are connected by a double nut 11 so that they can be adjusted up and down.

The actuating plate 12 is provided at opposite ends of the actuating plate 12.
a parallel part 13a extending substantially in the sliding direction; and a perpendicular part 13 extending in a direction substantially perpendicular to the sliding direction.
A first elongated hole 13 having a substantially L-shape is formed, respectively. In addition, an operating lever 15 having a substantially U-shaped cross section is pivotally supported on the valve body 1 via a support shaft 14 so as to be able to swing vertically, and a second straight line formed in a substantially radial direction from the support shaft 14 is provided. Long hole 16
are formed in pairs so as to face each other, and a pair of pins 17 are connected to each other by connecting portions 17a bent in a U-shape as shown in FIG. Slideably locked. The pins 17 are also slidably engaged with the elongated holes 13, respectively. Further, the pin 17 is moved to the operating plate 12 by a tensioning means 18 such as a spring.
It is pulled in the direction of the end of the orthogonal part 13b of the elongated hole 13. The operating lever 15 is pressed downward by a pressing means 19 such as a spring.

As described above, according to the first embodiment, as shown in FIG. While sliding the orthogonal part 13b of the hole 13 toward the parallel part 13a, the actuating plate 12 is slid upward, and the valve body 9 is opened via the valve rod 10 that is locked to the actuating plate.

Further, as shown in FIG. 5, when the operating lever 15 is further swung upward, the pin 17 reaches the parallel portion 13a of the elongated hole 13, and the operating plate 12 slides downward due to the pressing force of the pressing means 8. and the valve body 9 is closed.

Then, when the grip on the operating lever 15 is released, the operating lever 15 is swung downward by the pressing force of the pressing means 19, and at the same time, the pulling force of the tensioning means 18 causes the operating lever 15 to swing downward.
The pin 17 is moved to the end of the orthogonal part 13b of the elongated hole 13.

[Effects of the invention] As described above, the valve according to this invention has the following effects.

(1) The valve can be opened and closed simply by swinging the control lever upward, and by keeping the swing speed constant, the discharge amount per time can be regulated to a nearly constant level.

(2) The discharge amount per discharge is adjusted by replacing parts to adjust the length of the orthogonal part of the first elongated hole in the first embodiment and the interval between the valve bodies facing each other in the second embodiment. It is possible to change it by doing so.

(3) By maintaining the swing of the operating lever at a constant angle, the valve can be kept open.

(4) The valve body is urged by a pressing means so that it can sit on the valve seat, and after the pin engages in the parallel part of the second elongated hole, the valve body can be pressed without applying any artificial force. Since the valve body is seated, a long and stable closing operation by the valve body and valve seat can be expected.

[Brief explanation of the drawing]

1 and 2 are partially cutaway side and rear views of a first embodiment of the valve of this invention, FIG. 3 is a side view of a pin used in the valve, and FIGS. FIG. 5 is an explanatory diagram showing the operating state of the valve, and FIGS. 6 and 7 are partially cutaway side and rear views of the conventional valve. In the figure, 1...valve body, 2...inlet,
3... Outlet, 4... Passage, 5... Valve box, 6... Valve seat, 7... Valve seat member, 8... Pressing means, 9... Valve body, 10... Valve stem, 12... Actuation plate, 13...first elongated hole, 13a...parallel part, 13b...orthogonal part, 14...support shaft, 15...operation lever, 16...
. . . second long hole, 17 . . . pin, 17a . . . connecting portion, 18 . . . tension means, 19 . . . pressing means.

Claims (1)

[Scope of utility model registration request] A valve body is arranged so as to be able to sit on a valve seat formed in a valve box of a valve body, and an operating lever that is pivotally supported on the valve body via a support shaft is locked, and the swinging operation of the operating lever causes the above-mentioned A valve capable of opening and closing a valve body, wherein an actuating plate is disposed on the valve body so as to be slidable in substantially the same direction as the moving direction of the valve body, and the actuating plate extends substantially in the sliding direction. forming a first elongated hole having a parallel portion and an orthogonal portion extending in a direction substantially orthogonal to the sliding direction, and forming a second elongated hole extending in a substantially radial direction from the spindle in the operating lever; , the actuating plate and the operating lever are engaged with each other through pins slidably locked in both of the elongated holes, and when the operating lever is swung in one direction, the pin is moved into the first elongated hole. When the valve body is locked in the orthogonal part, the valve body is opened via an actuating plate, and when the pin is engaged in the parallel part of the first elongated hole, the valve body is closed by a pressing means. Valve.