JP3080570U - Slip device - Google Patents

Abstract

(57) [Summary] [Object] To obtain a slip device capable of reducing the labor and time required for testing the slip device and reducing the cost. A slip mechanism is provided between a driving part and a driven part of the slip device, and in a slip device having a rotation transmitting hole inside the driven part, a rotation transmitting part is also provided outside the driven part. This is used for the slip torque test.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for operating a steering wheel such as a ball valve and a butterfly valve, and more particularly to a safety device for preventing excessive torque from being transmitted to a valve body by operating a steering wheel by using a slip mechanism. Belong.

[0002]

2. Description of the Related Art A slip device is mounted between a handle and a valve, and is made on the principle that when an excessive torque is applied to the handle, the slip is caused to prevent the excessive torque from being transmitted to the valve. Since it is a safety device, it is necessary to verify the slipping torque. Conventionally, this test is troublesome and causes high cost.

A conventional test method will be described with reference to FIG. FIG. 1A shows a torque measuring device to which an adapter B is attached, a slip device C is attached to the adapter B, and an operation handle D is attached to the slip device C. When the operating handle D is turned in this state, the torque is transmitted to the measuring device A via the slip device C adapter B, so that the torque applied to the handle can be measured. Then, the torque applied to the steering wheel is increased, the torque when the slip device C slips is measured, and the verification is completed.

[0004] In such a procedure, the verification of the slip device is performed one after another, but it takes time to mount the first half of the handle. It's easy because it only needs to be done. Next, I explain the reason for the trouble in the first half.

[0005] The slip device C is configured as follows. 1 is a drive unit and 2 is a driven unit, between which a slip mechanism is incorporated. Inside the driven part 2, there is a rotation transmitting hole 3 for transmitting rotation by being attached to a shaft of a valve rod or a gear device for operating a valve. In FIG. There is. Since the rotation transmitting hole 3 is formed in accordance with the valve stem and gear device of the customer, the diameter and the size of the key are various even when a circular hole and a key are used. In addition, some use pins instead of keys, others use square holes, and other shapes and dimensions are available. Therefore, the types of the rotation transmitting holes 3 are very large. The accuracy of the rotation transmitting hole 3 is high in order to reduce rattling when the rotation transmitting hole 3 is mounted on a valve stem or a shaft of a gear device.

The adapter B is for connecting the rotation transmitting hole 3 of the slip device C to the input shaft 5 of the measuring device, and the rotation is transmitted by the keys 6 and 7 in FIG. Since there are many types of rotation transmitting holes 3 as described above, adapters B are required for each of these types, and the number becomes large.

[0007] The mounting of the adapter B of many types to the input shaft 5 and the mounting of the slip device C to the adapter B have high accuracy of the input shaft 5 and the rotation transmitting hole 3, and include keys, pins, square holes and the like. It is difficult to adjust the position. Increasing the gap with the adapter B to make it easier to mount the slip device C is not possible because the rotation transmitting hole 3 will be damaged and cannot be mounted on the valve stem or gear device. Therefore, the replacement of the adapter B, which has many types, and the installation of the slip device C are time-consuming and costly.

[0008]

[Problem to be solved by the invention] This invention is to obtain a slip device which can solve the above-mentioned problem "it takes time to replace an adapter".

[0009]

The essence of the problem lies in the use of the rotation transmitting hole 3 for connection with the adapter B. Instead of using the rotation transmitting hole 3, a rotation transmitting part to the adapter is provided outside the driven part 2 separately, and the adapter B is attached to this to transmit the rotation. If this rotation transmitting unit is standardized to a constant shape and size regardless of the size of the slip device, there is no need to replace one adapter.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an explanatory view of a test method according to an embodiment of the present invention, which is in the same state as FIG. 1, but does not show the operation handle D. FIG. 3 is a bottom view of the slip device C of FIG. The driven portion 2 of the slip device B has a rotation transmitting hole 3 on the inside, and a rotation transmitting portion E for transmitting rotation to the adapter B on the outside. The rotation transmitting portion E in FIG. 2 has a circular outer periphery and is provided with a two-face width 8.

A hole is made in the adapter B in accordance with the rotation transmitting section E. A gap is provided in the hole of the adapter B to make it easier to fit. Attach this adapter B to the measuring device.

The shape and dimensions of the rotation transmitting portion E are the same regardless of the type of the rotation transmitting hole 3. Therefore, there is no need to replace adapter B with only one type. Even if the shape and dimensions of the rotation transmitting section E must be changed depending on the size of the slip device C, the adapter B may be changed only when the slip device C changes, so that the labor for replacing the adapter B can be greatly reduced.

It is easy to attach the slip device C to the adapter B because there is a gap. The width across flats 8 may be damaged due to the gap, but there is no problem because the width across flats 8 is not used except for the test.

The width across flats 8 can also be used for testing slip torque by another method. For example, the two-face width 8 can be fixed by sandwiching it with a vice, and the slip torque can be measured by turning the drive unit 1 with a torque wrench. In this method, the test can be performed regardless of the rotation transmitting hole 3 without the need for an adapter, so that the labor can be saved in the same manner as described above. If the width across flats 8 is not present, the adapter B must be sandwiched between vice for testing, and as described above, only the type of the rotation transmitting hole 3 requires an adapter, which is troublesome.

In the above-described embodiment, the rotation transmitting portion E uses the width across flats 8. However, in another embodiment, instead of the width across flats 8, the width may be square or hexagonal. Sometimes a pin is used. However, the effects described above can be obtained if they are unified to any one.

In the above description, the case where the operation handle D and the slip device C are separate has been described. However, the case where the slip device C is incorporated in the handle, that is, the case where the above-described drive unit 1 is provided in the handle boss. The same effect can be obtained by providing the same rotation transmitting portion E in the driven portion 2 as described above.

[0017]

[Effects of the Invention] According to the present invention, it is possible to reduce the labor and time required for testing a slip device and a handle with a slip device, thereby reducing costs.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a conventional method for testing a slip device.

FIG. 2 is an explanatory view of a test method according to an embodiment of the present invention.

FIG. 3 is a bottom view of the slip device shown in FIG. 2;

[Explanation of symbols]

A: Torque measurement device B: Adapter C: Slip device D: Operation handle E: Rotation transmission unit 1: Drive unit 2: Driven unit 3: Rotation transmission hole 4: Keyway 5: Input shaft 6: Key 7: Key 8: Width across flats

Claims (1)

[Utility model registration claims] 1. A slip device having a slip mechanism between a driving part and a driven part and having a rotation transmitting hole inside the driven part, wherein a rotation transmitting part is also provided outside the driven part. A slip device characterized by the above-mentioned.