KR20050007969A - high temperature impact test device - Google Patents

Abstract

PURPOSE: A hot impact test apparatus is provided to exactly measure the impact force at the closing of a valve disk inside a check valve by having the functions of a hot device and an impact controller. CONSTITUTION: An impact rod(26) is installed in the upper part of a fixing member(19) to axially rotate by supporting through a support(46) and to have an impact piece(28). A sample piece(54) is faced to the impact piece of the impact rod. The sample piece is connected through another support(47). A heater box(52) having a heater(50) is operated as a heat source around the sample piece. The heater box is connected with the sample piece through an arm to rotate in an impact tester(20) at a certain angle. Thereby, the impact force is exactly measured when a valve disk embedded inside a check valve is closed.

Description

High temperature impact test device for valve discs

The present invention relates to a high temperature impact test apparatus for a valve disc, and more particularly, to precisely reproduce the function of the high temperature means and the impact control means to accurately measure the impact force upon closing of the valve disc embedded in the check valve. It relates to a high temperature impact test apparatus that makes this possible.

In general, a check valve for preventing a backflow, which is used for piping of a power generation equipment, is opened by a conveying force of steam during operation as shown in FIG. The valve disc 12 closes instantaneously by its own weight about 10, and has a structure which blocks | blocks steam from backflow.

Therefore, when the heavy duty medium moving in the direction of the arrow is stopped and the valve disc 12 installed in the pipe 14 is closed, the valve disc 12 and the valve seat part 16 are completely contacted to prevent leakage of steam or water. do.

However, since the surface contact between the valve seat portion 16 and the valve disc 12 cannot be sufficiently maintained by the material of the valve itself due to abrasion and stop shock generated during operation, the valve seat portion 16 and The valve disc 12 is hard faced with a material having impact resistance and abrasion resistance.

Accordingly, the present invention has been proposed to solve the above problems, and when the valve disc embedded in the shank valve is closed, the high temperature means and the impact control means to accurately measure the impact force according to the closed to enable precise reproduction There is a purpose in that.

1 is a cross-sectional view showing a check valve through which steam passes

2 is a perspective view showing a conventional impact tester

Figure 3 is a front view showing the impact tester of the present invention

<Explanation of symbols for the main parts of the drawings>

10 hinge portion 12 valve disc

14 piping 16 valve seat

20: high temperature impact tester 22: impact part

24: bearing 26: impact rod

36: load adjustment disk 40: angle division

44: heating part 48: control box

50: heater 68: chamber

70: arm

The present invention is to achieve the above object, the upper part of the fixing member is supported by a vertically installed support is provided with a shock rod that is equipped with an impact piece while allowing axial rotation freely, the impact piece of the impact rod abuts The test piece to be fastened through another support, characterized in that the heater box is equipped with a heater around the test piece is connected through the arm to act as a heat source to rotate the test piece by a certain angle to the test piece.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The high temperature impact tester according to the present invention includes an impact part for impact, a heating part for maintaining a high temperature, a test piece to be impacted, and a support part for supporting each part, as shown in FIG. 3.

First, the impact portion 22 of the high temperature impact tester 20 is supported by a support 46 provided with a vertically mounted impact rod 26 free of shaft rotation through a bearing 24, and the impact rod 26 On one side, an impact impact piece 28 is fastened via a bolt 30.

In addition, two methods are applied to the impact rod 26 to adjust the load at the time of impact. First, the load adjusting plate 32 is separated through the bolt 30 at a position corresponding to the impact piece 28 vertically. To be possible. Second, the load adjustment rod 34 machined with a screw is fastened to the impact rod 26 in a state in which one side end corresponding to the impact piece 28 is extended.

In addition, the load adjusting rod 34 is fitted with a load adjusting disk 36 to adjust the load while the load adjusting disk 36 is moved within the range of the load adjusting rod 34. In addition, the nut 38 is fastened to the load adjusting rod 34 to fix the position of the load adjusting disk 36 on both sides in order to prevent the arbitrary position movement of the load adjusting disk 36.

In addition, the impact portion 22 is provided with an angle scale plate 40 to adjust the size of the moment, and also for the accurate angle adjustment is equipped with an angle indicator 42 on the rotating shaft.

In addition, the heating unit 44 is connected to the control box 48 fixed to the support 46 to control the temperature, the heater box 52 equipped with a pipe-shaped heater 50 acts as a heat source It is connected to the impact tester 20 through the arm 7 to rotate by a predetermined angle.

The test piece 54 is fastened to the other support 47, the temperature is raised by the surface contact with the heater box 52, so that the jig (using the bolt 56 and the nut 60) for accurate coupling before the test ( It is fixed to 58, and is installed so that it can be finely adjusted in up, down, left and right directions using the impact angle adjusting bolt 62 fitted into four holes machined in the jig 58.

Therefore, since the test piece 54 which is in surface contact with the heater box 52 and the heater box 52 by the heat generated from the heater 50 is an indirect heating method, the thermocouple 64 for temperature control is performed by the test piece 54. It is installed on the surface of the heater box 52 which is in contact.

In addition, the heater box 52 is wrapped with a heat insulating material 66 and sealed with a chamber 68 to prevent heat from being released by blocking the entire heater 50 from the outside, and when the temperature of the test piece 54 reaches the test temperature, the chamber The heater box 52 is rotated by using the arm 70 attached to the heater box 52 to open the heater 20 and remove the heater box 52 from the rotation path of the impact rod 26. 28) to prevent interference when moving to the specimen (54).

When the above state is completed, the impact rod 26 is positioned at the test angle indicated by the angle indicator 42 using the load adjusting rod 34, and then the impact rod 26 is rotated by its own weight. By the axial rotation, the impact test piece 28 transmits the impact force as much as the calculated amount to the impact test piece 54 which is maintained at a high temperature, and through this high temperature impact test, accurate measurement can be performed. .

The present invention configured as described above is equipped with the functions of the high temperature means and the impact control means to accurately measure the impact force when the valve disk built in the check valve is closed, there is an effect capable of precise reproduction.

Claims (6)

An upper part of the fixing member 19 is provided with a shock rod 26 which is supported by a vertically mounted support 46 and is provided with an impact piece 28 while allowing free rotation of the shaft. The test piece 54 to which the impact piece 28 abuts is fastened through another support 47, and a heater box 52 equipped with a heater 50 acts as a heat source around the test piece 54. High temperature impact test apparatus for a valve disc, characterized in that connected to (54) through the arm (7) to rotate by a predetermined angle to the impact tester (20). The method of claim 1, The test piece 54 is a high-temperature shock for the valve disk further comprises a minute angle moves up, down, left and right by the impact angle adjusting bolt 62 inserted into the four holes machined in the jig 58. Test equipment. The method of claim 1, High temperature impact test apparatus for a valve disc further comprises a thermocouple (64) is installed so that the heater box (52) indirectly measures the heating temperature of the test piece (54) on the surface to control the temperature. The method according to any one of claims 1 to 3, The heater box (52) is wrapped with a heat insulating material (66) and sealed with a chamber (68) to block the entire heater (50) from the outside to prevent heat from being released, characterized in that the valve disk high temperature impact test apparatus. The method of claim 1, One side of the impact rod 26 is a shock piece 28 is fastened so as to be detachable, and the upper portion corresponding to the impact piece 28 further includes a high temperature for valve disc further comprising a load control plate 32 is detachably fastened. Impact test device. The method according to any one of claims 1 to 5, One side of the impact rod 26 is fastened in a state in which the load adjusting rod 34, which is machined on the other side corresponding to the impact piece 28, extends to the impact rod 26, and the load adjusting rod 34 High temperature impact test apparatus for a valve disc, characterized in that the load adjustment disk 36 is fitted to move within the range of the load control rod (34).