JPH0719673U - Diaphragm valve with lock mechanism - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Providing a diaphragm valve with a rocky mechanism that ensures the open or closed state of the valve and pushes and turns the handle knob to close or open the valve. To do. [Structure] A valve box 1 having a fluid inlet 2 on one side and a fluid outlet 3 on the other side and provided with a valve seat sheet 4, and a diaphragm provided inside the valve box facing the valve seat sheet. 5, a diaphragm piece 12 that presses the diaphragm, a spindle cap 13 and a spindle 15 that rotates and rises,
In the diaphragm valve including the handle knob 17 connected to the spindle, the ascending spring 22 is loaded in the lower recess 21 of the lower spindle 15a, and the protrusion 23 of the upper spindle 15b is connected to the lower spindle. Non-rotatably and vertically slidably fitted in the upper recess 20
The adjust ring 28, the lock pin 27, and the stopper pin 29 are provided in the notched hole 26 provided in the bonnet 8.
Insert.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention makes it possible to lock the valve closed or open state in a diaphragm valve that opens and closes by rotating the handle knob 90 degrees, and pushes the handle knob around when the valve is opened or closed. The present invention relates to a diaphragm valve with a lock mechanism.

[0002]

[Prior art]

 The conventional manually opened / closed diaphragm valve 30 shown in FIGS. 7 and 8 is opened by rotating the diamond-shaped (or diamond-shaped deformation) handle knob 31 in parallel to the flow direction of the fluid arrow by 1/4. The mainstream type is a type that can be opened and closed at a glance by turning it 1/4 turn at a right angle, and other manually opened and closed diaphragm valves that have more than 1/2 turn. It is a diaphragm valve that has characteristics such as stroke and flow rate similar to those of the above, and is easy to operate.

However, the diaphragm valve 30 that opens and closes 90 degrees creates the open and closed states of the valve by stopping the 90-degree rotation of the handle knob 31 with the stopper 32 and the stopper pin 33. Since it is a valve that opens and closes with a slight rotation of 31, if the valve is not completely closed or opened, or if a person, article, etc. mistakenly touches the handle knob 31, the valve opens, If the opening of the valve changes, the fluid may flow unnecessarily or the flow rate may change, which may cause an accident.

[0004]

[Problems to be solved by the device]

 In view of this, the present invention ensures that the valve is in the closed or open state so that it does not move when a person or an article contacts the handle knob or when the handle knob is rotated in parallel, and the valve is opened. It is intended to provide a diaphragm valve with a lock mechanism in which a handle knob is pushed and turned to be brought into a closed state or a closed state.

[0005]

[Means for Solving the Problems]

 A diaphragm valve with a lock mechanism according to the present invention for solving the above-mentioned problems has a fluid inlet on one side and a fluid outlet on the other side, and a valve seat is provided at the periphery of any inner opening. A valve box and a diaphragm that is provided inside the valve box facing the valve seat, and the peripheral edge is placed on an annular projection on the peripheral edge of the bottom surface of the valve box, pressed by the bonnet, and tightened with a nut. A diaphragm piece slidably arranged in the bonnet to press the diaphragm, a spindle cap, and a spindle that rotates and rises were fitted to the upper end of the bonnet, and were connected to the spindle with a set screw via an adjust ring. In a diaphragm valve consisting of a handle knob, the spindle is divided into two parts, the lower spindle is provided with two recesses at the center of the upper surface, and the lower recess is provided with upper recesses. Insert a spring for the upper spindle, provide a convex portion on the lower surface of the upper spindle, and fit the convex portion into the upper concave portion of the lower spindle so that it cannot rotate but can slide up and down. The upper peripheral wall is symmetrically provided with a substantially rectangular hole having a notch on the upper side of one side end and over 90 degrees, and the adjust ring and the lock pin attached to the upper spindle are inserted into the hole and at the same circumferential position. When the stopper pin attached to the lower spindle is inserted and the handle knob is turned 90 degrees from the valve open or closed state of the diaphragm valve to the valve closed or valve open state, The upper spring is pushed up by the ascending spring in the recess, and the lock pin engages with the notch on the upper side of one end of the hole to lock the lock pin.

[0006]

[Action]

 The diaphragm valve with a lock mechanism of the present invention configured as described above has the upper spindle connected to the handle knob with the set screw when the handle knob is manually rotated 90 degrees in the valve open or valve closed state. Also, the lower spindle rotates 90 degrees and descends in the bonnet, whereby the spindle cap and diaphragm piece also descend, the diaphragm is pressed and adheres to the valve seat seat, the valve is closed or opened, and the handle knob is It stops when the stopper pin comes into contact with one end of the hole. When the valve is closed or opened in this way, the lock pin is released from the upper edge of the hole and located near the inlet of the notch above the one end, so the upper spindle is pushed by the lift spring. When the lock pin is raised, the lock pin enters into the notch on the upper side of one side and engages with the lock pin to automatically lock the closed or opened state. Therefore, even if a person or article accidentally contacts the handle knob, the handle knob does not move and the valve does not open or close.

When opening or closing the valve, push the handle knob to lower the upper spindle against the lifting spring, remove the lock pin from the notch above one end of the hole, By turning the handle knob 90 degrees backward, the stopper pin contacts the other end of the hole and stops, and the valve opens or closes.

[0008]

【Example】

 An embodiment of a diaphragm valve with a lock mechanism according to the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 is a valve box having a fluid inlet 2 on one side and a fluid outlet 3 on the other side. A valve seat 4 is provided on the inner peripheral edge of the opening. A diaphragm 5 is provided in the valve box 1 so as to face the valve seat 4, and a peripheral portion of the diaphragm 5 is placed on an annular projection 6 on a peripheral edge of a bottom surface of the valve box 1, and a bonnet 8 having a flange 7 on a lower outer periphery thereof. The cylindrical nut 10 is screwed into the threaded portion 9 on the outer periphery of the vertical portion of the valve box 1, the bonnet 8 is tightened via the flange 7, and the diaphragm 5 is fixed. Reference numeral 11 is a lock nut of the tubular nut 10. A diaphragm piece 12 for pressing the diaphragm 5 is slidably arranged at the lower end of the hood 8, and a cylindrical spindle cap 13 having a bottom is slidably arranged thereon, and a disc spring 14 is arranged thereon. The spindle 15 is screwed to the screw 16 at the upper inner circumference of the bonnet 8 so that the spindle 15 can be rotated and moved up and down, and the lower end is fitted in the spindle cap 13. A handle knob 17 is fitted to the upper end of the bonnet 8, and is connected to an adjusting string 19 and an upper end of the spindle 15 with a set screw 18.

In this diaphragm valve, the spindle 15 is vertically divided into two, and two recesses 20 and 21 are provided at the center of the upper surface of the lower spindle 15a. A spring 22 is inserted, a convex portion 23 is provided at the center of the lower surface of the upper spindle 15b, and the convex portion 23 is fitted into the concave portion 20 so that it can be unrotatably slid up and down with two keys 24. . As shown in FIG. 4, two substantially rectangular holes 26 having a notch 25 on one side end upper side are provided in the upper peripheral wall of the bonnet 8 symmetrically (see FIG. 2). The adjusting ring 19 and the two lock pins 27 attached at the symmetrical positions of the upper spindle 15b are inserted into the individual holes 26, respectively. Further, a stopper pin 29 attached at the same circumferential position as the lock pin 27 is inserted into the hole 26 in an adjust ring 28 fitted to the upper end of the lower spindle 15a and its outer periphery.

In the diaphragm valve with a lock mechanism of the embodiment configured as described above, the handle knob 17 is manually indicated by the two-dot chain line in FIGS. 2 and 3 in the valve open state of FIGS. 1 to 3. When rotated 90 degrees in this way, the upper spindle 15b and the lower spindle 15a, which are connected to the handle knob 17 with the set screw 18, rotate 90 degrees and descend in the bonnet 8 as shown in FIG. As a result, the spindle cap 13 and the diaphragm piece 12 are also lowered, the diaphragm 5 is pressed and is brought into close contact with the valve seat seat 4, the valve is closed, and the handle knob 17 causes the stopper pin 29 to abut one end of the hole 26. Stop. When the valve is closed in this way, the lock pin 27 is released from the upper edge of the hole 26 and positioned near the entrance of the notch 25 on the one side end, so that the upper spindle 15b is pushed up by the rising spring 22. Then, as shown in FIG. 6, the lock pin 27 enters into the notch 25 and engages, and the valve closed state is automatically locked. Therefore, even if a person or an article accidentally contacts the handle knob 17, the handle knob 17 does not move and the valve does not open.

When opening the valve, the handle knob 17 is pushed to lower the upper spindle 15b against the ascending spring 22 to remove the lock pin 27 from the notch 25, and then the handle knob 17 is moved to the position shown in FIG. When it is rotated 90 degrees as shown by the alternate long and short dash line in FIG. 3, the stopper pin 29 comes into contact with the other end of the hole 26 to stop, and when the handle knob 17 is released, the lifting spring 22 pushes the upper spindle 15b. Although it is raised, since the lock pin 27 is locked to the upper edge of the hole 26 as shown in FIG. 4, the upper spindle 15b stops and the handle knob 17 stops without being pushed up. In the above embodiment, the valve is locked when the valve is closed. However, if the notch 25 of the hole 26 is changed from one side end upper side to the other side end upper side, it can be locked when the valve is opened.

[0012]

[Effect of device]

 As described above, the diaphragm valve with a lock mechanism of the present invention is completely locked automatically when it is closed or opened, and the handle knob does not move even if a person or an article accidentally touches the handle knob, and the valve does not move. It never opens or closes. Therefore, the closed or open state of the valve can be completely ensured, and safety and reliability are improved. Further, when the valve is opened or closed, it is only necessary to push the handle knob around, so that the valve opening or closing operation is easy.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a diaphragm valve with a lock mechanism according to the present invention.

FIG. 2 is a cross-sectional plan view taken along the line AA of FIG.

3 is a cross-sectional plan view taken along line BB of FIG.

FIG. 4 is a perspective view showing a lock mechanism of the diaphragm valve of the present invention when the valve is open.

5 is a longitudinal sectional view showing a state when the valve is closed in the diaphragm valve with a lock mechanism of FIG.

FIG. 6 is a perspective view showing a lock mechanism of the diaphragm valve of the present invention when the valve is closed.

FIG. 7 is a vertical cross-sectional view showing a conventional manually opened and closed diaphragm valve.

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

[Explanation of symbols]

 1 Valve box 2 Fluid inlet 3 Fluid outlet 4 Valve seat 5 Diaphragm 6 Annular protrusion 7 Flange 8 Bonnet 9 Screw part 11 Cylindrical nut 11 Lock nut 12 Diaphragm piece 13 Spindle cap 14 Disc spring 15 Spindle 15a Lower spindle 15b Upper spindle 16 Screw 17 Handle knob 18 Set screw 19 Adjusting ring 20 Upper recess 21 Lower recess 22 Lifting spring 23 Convex part 24 Key 25 Notch 26 Hole 27 Lock pin 28 Adjust ring 29 Stopper pin

Claims (1)

[Scope of utility model registration request] 1. A valve box having a fluid inlet on one side and a fluid outlet on the other side, and a valve seat seat provided on the inner peripheral edge of any one of the inner side and a valve seat facing the valve seat. The diaphragm is mounted on the annular protrusion on the bottom of the bottom of the valve box, is pressed by the bonnet, and is clamped and fixed by the nut, and the diaphragm is slidably arranged in the bonnet and presses the diaphragm. In a diaphragm valve consisting of a piece, a spindle cap, and a spindle that rotates and moves up and down, and a handle knob that is fitted to the upper end of the bonnet and is connected to the spindle with a set screw via an adjust ring, the spindle valve is moved up and down. It is divided into two, and a recess is provided in two steps in the center of the upper surface of the lower spindle, and a rising spring is inserted in the recess of the lower step, and the upper spindle is projected to the center of the lower surface. A portion is provided, and the convex portion is non-rotatably and vertically slidably fitted in the upper concave portion of the lower spindle, and the upper peripheral wall of the bonnet is in the range of more than 90 degrees and on one side end upper side. A roughly rectangular hole with a notch is provided symmetrically, and the adjust ring, the lock pin attached to the upper spindle, and the stopper pin attached to the lower spindle at the same circumferential position are inserted into this hole. When the handle knob is rotated 90 degrees from the valve open or valve closed state to the valve closed or valve open state, the upper spindle is pushed up and locked by the rising spring in the lower recess of the lower spindle. A diaphragm valve with a lock mechanism, wherein a pin is engaged with a notch on an upper side of one end of a hole to be locked.