TWI551850B - Gripping and auxiliary alignment deice for valve rod stress sensor - Google Patents

Description

Valve stem force sensor clamping and auxiliary alignment device

The invention relates to a valve stem force sensor clamping and auxiliary alignment device, in particular to a nuclear power plant safety related power valve (electric valve, pneumatic valve) test, adhered to the valve stem for correct The device for measuring the force of the valve stem, especially the innovative performance with more correct and fast strain gauge alignment, convenient installation and stable clamping, and multi-size correspondence.

Nuclear power plant power valve stems are tested by force. Strain Gage is directly attached to the stem (Stem), or Teledyne's Quick Stem Sensor (QSS) is used. Most of them stick to the valve stem.

However, it is most troublesome to use the strain gauge to directly stick to the valve stem. Firstly, the crosshair of the valve stem must be drawn. After the strain gauge is glued, the drawn crosshairs are used for the correct alignment, and the fingers (or other alternatives) are required to be pressed. Tested after about ten minutes. If this work is performed in a high-radiation area, workers will inevitably accept high radiation doses. After the test is completed, the strain gauge cannot be reused once it is removed, resulting in waste and environmental protection.

Further, the strain gauge 41 is glued to the metal foil 4 by using the QSS system, and the metal foil 4 is pressed (welded) to the metal block 42 at both ends thereof as a clamping portion of the elastic clamp 5, as shown in Fig. 5. It is adhered to the valve stem 6, and it can be confirmed that the strain gauges are aligned with the axial direction of the valve stem 6 by confirming that the two ends of the metal foil 4 are at the same horizontal plane, thereby measuring the force on the valve stem 6 (Thrust & Torque). As shown in Fig. 6, the adhesion is convenient, and it is not required to be pressed by hand. When sticking to the valve stem 6, it is only necessary to use the elastic clamp 5 to sandwich the metal block 41 protruding from both ends of the metal foil 4, and clamp it to The elastic clip 5 can be removed after the glue has solidified and dried. However, in addition to the error of the positive valve stem, and if the elastic clamp is not removed during the test, most cases will not be tested due to interference. For example, the QSS is easily dropped from the valve stem due to the impact of the spring clip, and must be reattached. And if glued, if the elastic clip is inadvertently stuck to the glue, it will stick to the QSS, and after the glue is dry, when the elastic clip is removed, the QSS will not be removed from the valve stem together. Therefore, the user-like users cannot meet the needs of the user in actual use.

The main object of the present invention is to overcome the above problems encountered in the prior art and to provide an innovative performance with more accurate and rapid strain gauge alignment, convenient installation and stable clamping, and multi-size correspondence, which can be reduced. The exposure of the personnel radiation dose and the accuracy of the measurement value are clamped by the force sensor and the auxiliary alignment device.

A secondary object of the present invention is to provide a rubber belt fixing with an elastic force, without using an elastic clip, and directly performing the valve stem test without removing the rubber belt, and having a feeling of stress on the stem which reduces the risk of re-adhesion The detector is clamped and the auxiliary alignment device.

Another object of the present invention is to provide a valve stem force sensor clamping and auxiliary alignment device with reusability.

It is still another object of the present invention to provide a valve stem that is versatile and that is versatile and that is versatile and that is versatile.

For the purpose of the above, the present invention relates to a valve stem force sensor clamping and auxiliary alignment device, comprising: a flexible metal carrier, a strain gauge attached to the outer side thereof, and the metal slide One positioning pointer is disposed at one end, and a positioning scale is disposed at the other end, and two fixing hooks are respectively disposed at both ends. When the metal carrier is adhered to a valve stem, the positioning pointer corresponds to the positioning scale, and the positioning is performed by the positioning The pointer is aligned with the scale at the center of the positioning scale for measuring the strain of the valve stem and estimating the force thereof; and the two fixing members are provided with a hole at each end thereof for passing through the fixed hook and loop The metal slide is fixed by tension, and the stem test can be directly performed without removing the fixing member.

In the above embodiment of the present invention, the fixing member is a rubber belt which is flexible and moderately stretchable.

In the above embodiment of the invention, the size of the metal slide is corresponding to the valve stem of different diameters.

In the above embodiment of the invention, the positioning pointer, the positioning scale and the fixed hook and loop of the metal slide are stamped by a die.

In the above embodiment of the present invention, the positioning pointer is aligned with the center of the positioning scale, and it is confirmed that the metal carrier pasting posture has been aligned with the axial direction of the valve stem, so that the valve stem is accurately subjected to the thrust and The strain generated when torque is applied.

In the above embodiment of the present invention, the valve stem force sensor clamping and auxiliary alignment device are reusable.

(part of the invention)

1‧‧‧Metal slides

11‧‧‧Strain gauge

12‧‧‧ Positioning pointer

13‧‧‧ Positioning scale

14‧‧‧Fixed shackle

2‧‧‧Fixed components

21‧‧‧ holes

3‧‧‧ valve stem

(customized part)

4‧‧‧Sheet

41‧‧‧Strain gauge

42‧‧‧metal block

5‧‧‧ elastic clip

6‧‧‧ valve stem

Fig. 1 is a schematic exploded view of the structure of the present invention.

Figure 2 is a schematic view of the fixed hook and loop of the present invention.

Fig. 3 is a plan view showing the state of use of the present invention.

Fig. 4 is a partial perspective view showing the state of use of the present invention.

Figure 5 is a schematic diagram of the structure of the conventional QSS.

Figure 6 is a schematic view of the conventional QSS fixed to the valve stem using a spring clip.

1 to 4 are respectively a schematic exploded view of the structure of the present invention, a schematic view of the fixed hook and loop of the present invention, a schematic plan view of the state of use of the present invention, and a partial perspective view of the state of use of the present invention. As shown in the figure, the present invention is a valve stem force sensor clamping and auxiliary alignment device, which comprises a metal carrier 1 and two fixing members 2.

The metal carrier 1 mentioned above is a flexible thin metal carrier 1 . As shown in the first and second figures, a strain gauge 11 is disposed on the outer side of the outer surface, and a positioning pointer 12 is disposed at one end. The other end is provided with a positioning scale 13 and two fixing hooks 14 are disposed at both ends. Wherein, the metal carrier sheet 1 has a fixed width and can be cut into several different sizes to correspond to valve stems of different diameters; after each size of the metal carrier sheet 1 is cut, the positioning pointer can be formed by stamping with a mold. 12. The positioning scale 13 and the fixed shackles 14.

The fixing elements 2 are rubber material belts which are appropriately sized and flexible and moderately stretchable, and each fixing element 2 is provided with a suitable hole 21 at each end thereof. If so, a new valve stem force sensor clamping and auxiliary alignment device is constructed by the above disclosed process.

When in use, as shown in Figures 3 and 4, the metal carrier 1 is adhered to a valve stem 3 to be tested, and the positioning pointer 12 corresponds to the positioning scale 13 by the positioning pointer. 12 pairs the scale in the center of the positioning scale 13 to measure the strain of the valve stem 3, and calculate the force; when the positioning pointer 12 is aligned with the center scale, the metal carrier 1 pasting posture can be confirmed. It has been aligned with the valve stem 3, indicating that the upper strain gauge 11 is aligned with the axial direction of the valve stem 3, so that the strain generated by the valve stem 3 when subjected to thrust and torsion is accurately measured. In addition, the fixed shackle 14 provided at both ends of the metal slide piece 1 is fastened by a fixing member 2 (ie, a rubber belt) having a hole, and the metal slide piece 1 is fixed by the tensile force of the rubber belt. And it is not necessary to remove the fixing element 2 during the test. In addition, since the fixing member 2 (ie, the rubber belt) is flexible, it can be appropriately stretched and stretched, so that a metal carrier does not need to be applied only to a single-sized valve stem, and has versatility.

Therefore, the valve stem force sensor clamping and auxiliary alignment device of the present invention are mainly used for performing the safety related power valve (electric valve, pneumatic valve) of the nuclear power plant, and are adhered to the valve stem. A device that measures the force of the valve stem correctly. The invention is fixed by using an elastic rubber belt, does not need to use the elastic clamp, and can directly perform the valve stem test without removing the rubber belt, so that the device has fast and correct alignment, and convenient and stable clamping, etc. Great innovation. Compared with other similar products, it has more accurate and fast strain gauge alignment, convenient installation and clamping, and multi-size correspondence and other innovative performance. Therefore, the present invention mainly includes the following advantages:

1. It can be quickly adhered to the valve stem to reduce the exposure of personnel radiation dose.

2. Correctly correct the accuracy of the measured value by correcting the valve stem.

3. Reusable.

4. Use rubber belt to fix, do not need to remove when testing, reduce the risk of re-sticking.

5. The same slide does not need to be applied to a single size valve stem, and has versatility.

In summary, the present invention is a valve stem force sensor clamping and auxiliary alignment device, which can effectively improve various disadvantages of the conventional use, has more correct and fast alignment, convenient installation and stable clamping, and more Innovative performance such as dimensional correspondence, in turn, makes the invention more progressive, more practical, and more in line with the needs of the user. It has indeed met the requirements of the invention patent application, and has filed a patent application according to law.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.

1‧‧‧Metal slides

11‧‧‧Strain gauge

12‧‧‧ Positioning pointer

13‧‧‧ Positioning scale

14‧‧‧Fixed shackle

2‧‧‧Fixed components

21‧‧‧ holes

Claims (6)

A valve stem force sensor clamping and auxiliary alignment device comprises: a flexible metal carrier, a strain gauge is attached on an outer side thereof, and one end of the metal carrier is provided with a positioning pointer, and the other end is provided a positioning scale, and two fixing hooks are arranged at both ends, when the metal carrier is adhered to a valve stem, the positioning pointer corresponds to the positioning scale, and the positioning pointer is aligned with the center of the positioning scale a scale for measuring the strain of the valve stem and estimating the force thereof; and two fixing members each having a hole at each end thereof for fixing the metal slide piece by pulling the fixed hook and loop, and The stem test can also be performed directly without removing the fixing element. The valve stem force sensor clamping and auxiliary alignment device according to the first aspect of the patent application scope, wherein the two fixing components are rubber belts which are flexible and moderately stretchable. According to the scope of the patent application, the valve stem force sensor clamping and auxiliary alignment device, wherein the size of the metal slide is corresponding to the valve stem of different diameters. According to the scope of claim 1, the valve stem force sensor clamping and auxiliary alignment device, wherein the positioning finger, the positioning scale and the fixed hook ring of the metal slide are stamped by a die. The valve stem force sensor clamping and auxiliary alignment device according to the first application of the patent scope, wherein the positioning pointer is aligned with the center of the positioning scale, confirming that the metal carrier pasting posture has been Aligning the axial direction of the valve stem accurately measures the strain generated by the valve stem when subjected to thrust and torsion. According to the scope of the patent application, the stem force sensor is clamped and the auxiliary pair is installed. The system can be reused.