JPH0745908B2 - Diaphragm valve compressor connection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a diaphragm drive part of a diaphragm valve, and more specifically, to a device for connecting a central part of a compressor to a tip part of a spindle. It is a thing.

[Prior Art] As shown in FIG. 3, in a conventional diaphragm valve, a pin 11 projecting from the center of the upper surface of a diaphragm 10 sandwiched between a cylinder 20 and a body 30 is hooked in a connecting hole 14 of a compressor 12. Then, the compressor suspension 16 is hung on the U-shaped hook 15 on the upper surface of the compressor, and the compressor suspension is connected to the lower end of the spindle 16. Before attaching the cylinder 20 to the main body,
Attach the compressor suspension 16 to the diaphragm 10 as shown.
In order to hang it on the U-shaped hook 15 of the compressor 13 integrated with the compressor 13, the spindle 17 had to be lowered further than the lowered position where the valve was closed and the compressor suspension 16 had to project below the lower end of the cylinder 20. Since the spindle 17 and the piston 18 are integrated, in order to make the compressor suspension 16 project from the lower end of the cylinder 20, a special compressor connecting stroke S is provided below the valve opening / closing stroke as shown in FIG. I had to.

[Problems to be Solved by the Invention] Since the diaphragm connecting stroke S is out of the range of the stroke of the piston when the valve is opened and closed, the height of the valve is increased by that much, and the space of the installation place is narrowed. Was increasing costs.

The present invention has been made to solve the above problems, and an object thereof is to provide a diaphragm valve that does not require a stroke for connecting a compressor.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the characteristic means of the present invention is:
As shown in FIG. 1, the compressor is suspended on the spindle 17.
From the bottom, fix 16 with bolts 50 that pass through the axis, and
There is a connecting hole 14 in 13 through which the head of the bolt passes.

[Operation] The compressor suspension 16 is connected to the U-shaped hook 15 of the compressor 13.
Then, the bolt 50 is inserted into the bolt hole of the spindle 17 from below the compressor 13, the compressor suspension 16 is fixed to the spindle 17 by the bolt, and then the diaphragm 10 is attached to the compressor 13. Compressor suspension
Both the insertion of the compressor 13 fitted with 16 into the cylinder 20 and the insertion of the bolt 50 are performed in the axial direction of the spindle 17, so that the spindle 17 can be easily installed without lowering it from the valve shut-off position. Therefore, the piston
It is not necessary to provide the cylinder 20 with a space for a stroke for connecting the compressor, which further lowers 18 together with the spindle 17 below the valve opening / closing range.

[Embodiment] The device of the present invention will be specifically described based on an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, the diaphragm valve is sandwiched between the flange of the main body 30 and the flange of the cylinder 20 which partition the flow path. A pin 11 is attached to the center of the upper surface of the diaphragm 10, and an arm-shaped enlarged portion 12 projects radially from the tip of the pin 11. In the center of the compressor 13, a vertically extending connecting hole 14 is formed, and a radial recess 31 into which the enlarged portion 12 is fitted is provided in the connecting hole 14. When the pin 11 is inserted into the connecting hole 14 of the compressor 13 and the enlarged portion 12 is fitted into the recess 31, the diaphragm 10 is connected to the compressor 13. A U-shaped hook 15 is fitted on the compressor 13. The spindle 17 is provided with a bolt hole 51 extending from the lower end to the axial center, and a bolt through hole 52 is formed in the center of the compressor suspension 16. Compressor suspension 16 bolt
It is fixed to the lower end of the spindle 17 via 50.

The spindle 17 is composed of upper and lower spindles connected in tandem, and upper and lower pistons 18 are fixed respectively. An air pressure introducing hole 21 is provided in the cylinder 20, and the air pressure introducing hole 21 opens below the lower spindle 18. The upper and lower spindles 17 are provided with a connection hole 19 that is drawn from the lower side of the lower piston 18 to the lower side of the upper piston. A partition plate 22 is fixed between the upper and lower pistons 18 of the cylinder 20, and the partition plate 22 is fitted to the piston 17 in an airtight and slidable manner. The upper spindle 17 slidably penetrates a boss portion 26 of a cylinder cover 25 screwed into the cylinder 20 from above. Exhaust ports 23 and 24 are opened in the cylinder 20 and the cylinder cover 25, and the air spaces above the upper and lower pistons 18 are vented to the atmosphere.

A spring retainer sleeve 27 is screwed onto a boss portion 26 of the cylinder cover 25, and its lower edge is projected outward to form an outer peripheral protrusion 28. A spring bearing 30 is placed on the upper surface of the upper piston 18, and a coil spring is arranged between the spring bearing 30 and the cylinder cover 25. The upper edge of the spring bearing sleeve 27, which extends above the central cylindrical portion 34 of the spring bearing 30 and is higher than the outer peripheral protrusion 28, projects inward to form an inner peripheral protrusion 29 having an inner diameter smaller than the outer diameter of the outer peripheral protrusion 28.

Next, the assembly of the compressor coupling device of the present invention will be described.

Compressor suspension 16 to compressor 13 U-shaped hook 15
And then insert it into the cylinder 20 from the bottom
The bolt through hole 52 of the compressor suspension 16 in the bolt hole 51 of
Match. Then, insert a hexagonal grooved head bolt 50 into the connecting hole 14 of the compressor from below and pass it through the bolt passing hole 52 of the compressor suspension 16 to the bolt hole 51 of the spindle 17,
Fix the compressor suspension 16 to the spindle 17 and fix it. Next, the diaphragm is installed in the connecting hole 22 of the compressor 13.
The pin 11 of 10 is fitted, and the recessed part 31 is hooked with the arm-shaped enlarged part 12 to integrally connect the diaphragm 10 and the spindle 1.

In this way, the spindle 17, the compressor suspension 16,
It is not necessary to lower the spindle 17 below the opening and closing range of the valve, since the connection of the compressor 13 is all axially via the bolts 50. Therefore, it is not necessary to provide a space for a special stroke in the cylinder 20 for lowering the piston 18 beyond the normal lifting range.

[Advantages of the Invention] As described above, since the compressor for connecting the diaphragm of the diaphragm valve of the present invention and the spindle is inserted into the spindle in the axial direction, not in the conventional radial direction,
It is not necessary to lower the spindle beyond the lifting range when opening and closing the valve and hang it from the cylinder. As a result, the space for raising and lowering the spindle, which is provided to connect the compressor and the spindle, is not required, and the height of the valve is lower than that of the conventional one, so that the cost is reduced accordingly. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a part of a diaphragm valve provided with the device of the present invention by cutting away, FIG. 2 is a front view of a half section of the diaphragm valve of FIG. 1, and FIG. 4 and FIG. 4 are views showing a mounting state of a conventional example. In the figure, reference numeral 10 is a diaphragm, 11 is a pin, 12 is an enlarged part, 13 is a compressor, 14 is a connecting hole, 16 is a compressor suspension, 17 is a spindle, 31 is a recess, 50 is a bolt, 51 is a bolt hole, and 52 is a The bolt through holes are shown respectively.

Claims (2)

[Claims] 1. A device comprising a spindle, a compressor suspension fixed to a lower end of the spindle, a compressor hung on the compressor suspension, and a diaphragm having an upper surface center fixed to the compressor. A bolt hole passing through the axial center is provided at the lower end, a bolt through hole is opened in the center of the compressor suspension, the compressor suspension is fixed to the spindle via a bolt, and a connecting hole through which the head of the bolt passes is provided in the compressor. A compressor connecting device for a diaphragm valve, wherein a fastening portion provided at the center of the upper surface of the diaphragm in the coupling hole is fastened after passing through the bolt. 2. A diaphragm is formed by projecting a pin from the center of the upper surface of the diaphragm, a radial expansion portion is provided at the head of the pin, and a radial recess into which the expansion portion fits is provided in a connecting hole of the compressor. The compressor connecting device for a diaphragm valve according to claim 1, wherein the compressor connecting device is provided.