JPH053341U - Steering device for valve stem - Google Patents

Abstract

(57) [Abstract] [Purpose] It is easy and inexpensive to generate abnormal noise that occurs in the valve stem drive system when the gate opening and closing device is opened without the cost of modifying the valve stem drive system after on-site installation. To prevent it. [Structure] Position regulating bodies 18, 19 for pressing the outer peripheral surface of the valve rod 9 to position in the horizontal direction are provided.
The pressing amount of 8 and 19 against the valve rod 9 is adjusted by the screw operation type eccentricity adjusting members 25 and 26 so that the natural frequency of the drive system of the valve rod 9 can be arbitrarily changed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is applicable to, for example, gates and movable weirs in waterworks, sewers or river facilities. The present invention relates to a valve stem steadying device used for an opening / closing device.

[0002]

[Prior art]

  In gate opening / closing devices, the valve rod connected to the door body is It is screwed and supported on the female thread, and the handle of the lifting drive mechanism is operated. The gate is opened and closed by moving the valve rod up and down.

[0003]

[Problems to be solved by the device]

  By the way, the above door is relatively heavy, so lower it to close the gate. When moving, the magnitude of the torque required to move the door tends to change due to various factors. is there. Such torque fluctuation induces a slight vibration to cause self-excited vibration or resonance. When an abnormal sound is generated due to a phenomenon and it is remarkable, this sound reaches 80 to 90 phones. May reach. As a measure to prevent this, change the natural frequency of the valve stem drive system. For self-excited vibration, measures are taken to absorb the vibration using a damper, etc. ing. However, these measures should be taken with the drive system onsite after the installation of the gate opening / closing device. In many cases, it had to be remodeled, and this cost a lot of money.

[0004]   The present invention was made in order to solve the above problems. A valve stem steady rest device that can easily and effectively prevent abnormal noise from being generated. It is intended to be provided.

[0005]

[Means for solving the problem]

  In order to achieve the above object, the present invention presses the outer peripheral surface of a valve rod that is driven up and down. The position regulating plate that regulates the horizontal position and the pressing amount of this position regulating plate can be screwed. And a variable valve rod eccentricity adjustment member.

[0006]   Further, the position regulating body and the valve rod eccentricity adjusting member are provided in a plurality of stages in the axial direction of the valve rod. Preferably.

[0007]

[Action]

  According to the above configuration, the valve rod eccentricity adjusting member is screwed to face the valve rod of the position regulating body. By changing the amount of pressure applied, the natural frequency of the valve rod drive system changes, and self-excited vibration In addition, it is possible to suppress the generation of abnormal sound due to the resonance phenomenon.

[0008]   Particularly, the position regulating body and the valve rod eccentricity adjusting member are provided in a plurality of stages in the axial direction of the valve rod. In this case, the natural frequency can be finely adjusted to suppress the generation of abnormal noise. The effect can be further enhanced.

[0009]

【Example】

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention FIG. 11 is a front view showing a gate opening / closing device to which the valve stem steady rest device according to the present invention is applied.

[0010]   In FIG. 1, 1 is a gate composed of 2 upper doors and 3 lower doors, and 4 Is a door for opening and closing the gate 1, and 5 is a stand fixed to the installation floor 6. 7 is It is an up-and-down drive mechanism attached to the stand 5, and is operated by operating the handle 8. It is configured to drive the valve rod 9 screwed and supported by the thread portion (not shown) up and down. The door body 4 is connected to the lower end of the valve rod 9. The stand 5 has A steady rest 10 for the valve rod 9 shown in FIGS. 2 to 4 is provided.

[0011]   2 to 4, 11 has a notch 12 that does not prevent the valve rod 9 from moving up and down. Horizontal direction via the fixing bolts 13 and nuts 14 to the stand 5 The substrate 15 and 15 are removably fixed to the substrate 11 and are formed on the substrate 11. A bolt through hole that penetrates each bolt 13, and is a long hole extending in the horizontal direction in the left and right direction. It is composed of. The left and right ends of the base plate 11 are respectively provided with the valve rods. A pair of support walls 16, 16 and 17, 17 are erected on the front and rear sides of the 9 It

[0012]   The base plate 11 has holes 18a and 19a in which the valve rod 9 is loosely fitted, and the inner circumference thereof is Surface of the valve rod 9 is pressed against the outer surface of the valve rod 9 to regulate the horizontal position. Control bodies 18 and 19 are provided. 20A and 20B are the holes 18a and 19a, respectively. It is a bush attached to the inner peripheral surface. 21 and 21 of the upper position regulating body 18 A pair of front and rear support bolts for penetrating and supporting the front and rear portions, 22 and 22 are provided on the lower side. They are a pair of support bolts that penetrate and support the front and rear portions of the position control body 19. These support bolts 21 and 22 are supported at their ends by nuts 23 and 24, respectively. It is fixed to the holding walls 16 and 17, respectively. 25, 25 of the upper position regulating body 18 With the nuts screwed onto the bolts 21 and 21 corresponding to the left and right sides, the upper side position regulation A valve rod eccentricity adjusting member that changes the amount of pressing of the body 18 against the valve rod 9 is configured. 26, Numeral 26 is screwed to the bolts 22 and 22 corresponding to the left and right sides of the lower position restricting body 19. A valve rod eccentricity in which the amount of pressing of the lower position regulating body 19 with respect to the valve rod 9 is varied with a nut. It constitutes an adjusting member.

[0013]   In the above configuration, when installing the gate opening / closing device first, And the center of each hole 18a, 19a of the lower position regulating bodies 18, 19 is the axial center of the valve rod 9. Position the board 11 relative to the stand 5 so that Tighten and fix with the nut 14.

[0014]   After installation, if the handle 8 of the lift drive mechanism 7 is rotated in one direction, the valve rod Door body 4 rises through 9, gate 1 is opened, and handle 8 is rotated in the opposite direction. If operated, the door 4 is lowered via the valve rod 9 and the gate 1 is closed. The above game When the door 1 is closed, the magnitude of the torque required to move the door 4 downward fluctuates and the valve When an abnormal sound is generated in the drive system of the rod 9, the position regulating bodies 18 and 19 with respect to the valve rod 9 Adjust the amount of pressure.

[0015]   That is, the nut 25 as the valve rod eccentricity adjusting member is screw-operated with respect to the bolt 21. If the upper position regulating member 18 is horizontally displaced, for example, leftward, The pressing amount to the left with respect to the valve rod 9 changes via the shoe 20A. Also same Then, the nut 26 as the valve rod eccentricity adjusting member is screwed to the bolt 22. If the lower position regulating body 19 is horizontally displaced to the right, the bush 20B is interposed. As a result, the amount of rightward pressing of the valve rod 9 changes. Thereby, the drive system of the valve rod 9 The natural frequency of is changed, and self-excited vibration or resonance phenomenon is suppressed. Therefore, After installation on site as described above, the above-mentioned game can be performed without modifying the drive system of the valve rod 9. It is possible to prevent the generation of abnormal sound when the door is closed. In other words, increase equipment costs It is possible to prevent the generation of abnormal sound without causing noise.

[0016]   By the way, as the valve rod 9 is repeatedly moved up and down, the upper and lower position regulating members 18, When the pressing amount of 19 against the valve rod 9 becomes small, the above adjustment operation is performed at that time. Do it again. If the bushes 20A and 20B are not used, the position The regulators 18 and 19 may be made of a material having good slidability, such as brass.

[0017]   It should be noted that, as in the above-described embodiment, the structure in which the upper and lower two-stage position regulating bodies 18 and 19 are used. In the case of the above, it is possible to finely change the natural frequency of the drive system of the valve rod 9, Preventing the generation of ordinary noise can be made more effective, but position regulation is limited to one step A configuration using the body 18 (19) may be used.

[0018]   In addition, in the above-described embodiment, the description has been made by applying it to the gate opening / closing device, but It is also applicable to those that open and close weirs.

[0019]

[Effect of device]

  As described above, according to the present invention, the pressing amount of the position regulating body that presses the outer peripheral surface of the valve rod is adjusted. Since the valve rod eccentricity adjustment member that is screw-operated is used for variable adjustment, Change the natural frequency of the valve stem drive system by a simple operation of It is possible to prevent the occurrence, and it is not necessary to modify the valve stem drive system after installation. Therefore, cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a front view of a gate opening / closing device to which a valve stem steadying device according to an embodiment of the present invention is applied.

FIG. 2 is a front sectional view showing a steady rest of a valve stem.

FIG. 3 is a plan sectional view showing a steady rest of a valve rod.

FIG. 4 is a left side view showing the steady rest of the valve stem.

[Explanation of symbols]

9 valve rod 18, 19 Position control body 25,26 Valve rod eccentricity adjustment member

Claims (2)

[Scope of utility model registration request] 1. A position regulating plate that regulates a horizontal position by pressing an outer peripheral surface of a valve rod that is driven up and down, and a valve rod eccentricity adjusting member that varies a pressing amount of the position regulating plate by a screw operation. A steady rest for a valve stem, comprising: 2. The valve stem steady rest device according to claim 1, wherein the position regulating plate and the valve rod eccentricity adjusting member are installed in a plurality of stages in the axial direction of the valve rod.