JPS6118421Y2 - - Google Patents

Description

[Detailed description of the invention] This invention compresses the packing made of an elastic body through which a cable made of twisted wire connects the float and the level gauge.
In liquid level measurement equipment in which the cable is held in a packing to seal the gap between the circumference of the cable and the inner circumferential surface of the cable through hole in the packing, the cable passes through the packing as the float moves up and down in the cable. The present invention is described below based on the example drawings regarding a device that can further ensure the seal between the inner surface of the packing through hole and the outer surface of the cable by configuring the section with a cable having a circular cross section. Explain.

In FIG. 1, a liquid 2 is stored in a tank 1, and a float 3 is suspended by a cable 4 from the liquid surface. The cable body 4 passes through the interior of the cutoff valve 5 and is connected to the level gauge 7 via a guide 8, and the open ports on both sides of the cutoff valve 5 are connected to the tank 1 and the level gauge 7 via piping 6. are connected to each.

The shutoff valve 5 has a valve box formed by valve bodies A and B and a handle shaft support C, and each valve body is fastened with a screw or the like. The openings of the valve bodies A and B communicate with a liquid level gauge 7 and a tank chamber 1 via piping 6, respectively, as shown in FIG. A packing 16 made of an elastic body is disposed within the shutoff valve 5, and the packing 16 has a truncated conical shape. In addition, index body 4 is included in packing 16.
A through hole 16a is formed through which (more precisely, a round rod-shaped index body 25 to be described later) passes. Packing 16
A packing receiver 1 is provided on the frustoconical portion and the bottom of the
7 and packing support 15 are in contact with each other,
The bottom of the packing fits into the recess 15a of the support 15 so that the diameter is reduced when compressed.

The packing support 15 is arranged on the valve body B side via the guide 14, and holds the packing 16 together with the packing receiver 17. Furthermore, the packing support 15 and the packing receiver 17 are connected by a guide pin 18, so that the packing support 1
5 is prevented from rotating. Packing support 1
A thread is formed on the outer diameter portion of the shaft of the guide 1.
It is screwed together with the internal thread part of No.4. As described above, the guide 14 is pivotally supported by the valve body B, and the bevel gear 13 is fixed to a part of the guide via a pin 20 as shown in the figure. On the other hand, the shaft of the handle 11 is pivotally attached to the inner peripheral portion of the handle shaft support portion C via a metal 21. A bevel pinion 12 is connected to pin 1 on the side of the handle shaft opposite to the side where the handle 11 is attached.
9 and the bevel pinion 12
meshes with the bevel gear 13.

By the way, in the present invention, the entire length of the float suspension rope 4 is not made up of cables made of stranded wire, but only a part of the rope is made up of the through-hole of the cutoff valve as the float goes up and down. The portion where the cable is connected is constituted by a cable 25 having a circular cross section.

Next, the action will be explained. When it becomes necessary to perform periodic maintenance and inspection of the liquid level gauge, etc., first rotate the handle 11 of the shutoff valve 5. Rotation of the handle rotates the bevel pinion 12 and bevel gear 13, and the guide 14. The rotational force of the guide 14 is applied to the support 15
Although the support 15 is prevented from rotating by the pin 18, it is movable in the axial direction (up and down in the drawing), so it can be moved up and down by the forward and reverse rotation of the guide 14. Therefore, when the support 15 is screwed upward by operating the handle, the packing 16 is sandwiched between the receiver 17 and the support 15 .

As a result, the packing 16 is compressed, and the through hole 1
6a has a reduced diameter and holds the cable on its inner peripheral surface.

By the way, if the cable 4 is a cable made by twisting wires as shown in FIG. A gap along the twisting direction is inevitably formed between the inner circumferential surfaces of the through-hole portion 16a of the packing, and the paper in the tank leaks from this gap.

However, in this device, the entire length of the cable 4 is not made up of cables, and the portion held by the packing 16 is made up of a cable 25 having a circular cross section, so that the cable 25 has a hole through the packing to be compressed. The inner circumferential surface tightly hugs the outer surface of the cable 25. Therefore,
By packing, the inside of the shutoff valve 5 can be completely partitioned into a primary side and a secondary side, and leakage of paper in the tank can be completely prevented.

As is clear from the above description, this device can completely prevent paper from leaking in the tank, and can safely perform maintenance and inspection of liquid level gauges, etc.

[Brief explanation of the drawing]

Figure 1 is an overall view of this device, Figure 2 is a sectional view showing the internal structure of the shutoff valve, Figure 3 is a sectional view when the cable is used as a cable, and Figure 4 is a cable using the cable of the present invention. FIG. In the figure, 1...Tank, 2...Liquid, 3...Float, 4... Index body, 5... Shutoff valve, 7... Level gauge, 11... Handle, 12... Bevel pinion, 13... ...Bevel gear, 14...Guide, 15
...Patsuking support, 16...Patsuking,
17...Patsuking Uke, 25...Sakujo.

Claims (1)

[Scope of utility model registration request] In a liquid level measuring device in which a cable for suspending a float on the liquid level in a tank is connected to a liquid level gauge outside the tank, and the cable runs through piping connecting the tank and the liquid level gauge, the cable has a penetrating hole. A packing made of an elastic body is provided inside the valve box, and this packing is compressed and compressed by a packing receiver and support that are activated by an operation from outside the valve box, and the diameter of the packing is reduced. A cutoff valve whose circumferential surface wraps around a cable is provided at an appropriate position in the piping, and the cable has a cable with a circular cross section interposed in the part held by the packing of the cutoff valve. Paper cutoff device for surface measurement equipment.