JPS6224135Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a valve opening/closing device for a shutoff valve suitable for use in large-diameter piping, particularly piping that conducts high-temperature and/or high-pressure fluid.

The above-mentioned high temperature and high pressure mean above 400° C. and above 0.5 bar, respectively.

As a general valve opening/closing device for a shutoff valve, the one described in German Patent Publication No. 2226986 belongs to the public domain. In this opening/closing device, the operating lever is fixed to a rotating shaft for driving. Due to the possibly large rotational torques acting on such shafts, conventional drive elements are often unusable or cost-effective.

This rotating shaft is installed outside the cavity of the housing, and the power is transmitted through a nutcle joint and an angle joint.
The method using a lever is known from DE 2017833 A1. However, it has been pointed out that this type of device also has the problem that a large moment acts on the drive shaft, and that the device becomes complicated.

An important solution to avoid these disadvantages of previously known devices is to use a linear motion drive member as the drive member; such an idea is described in German patent no.
It belongs to the public domain under No. 1141500.

However, in the method described therein, the linear motion drive member is connected to a rotary lever having a center of rotation outside the cavity of the housing, so the lever arm is relatively long and the space required for installation is accordingly large. Become. Furthermore, the power transmission efficiency is also unfavorable, which is clear from the fact that an additional drive member is described for pulling the valve body away from the valve seat.

The purpose of this invention is to eliminate the above-mentioned drawbacks of the prior art, in particular when the fluid being handled is at a high temperature.
To provide a valve opening/closing device for a shutoff valve that is compact in structure and inexpensive, including an operating mechanism that operates reliably even when the pressure is high or the diameter of the pipe is large.

In order to achieve the above object, this invention is characterized by adopting the following configuration. That is,
A center bracket 17 is provided protruding from the valve body 2, and a housing bracket 18 is provided within the housing 1.
These two brackets 17, 18 are connected to the two brackets by connecting shafts 9, 9' and 10, 10' at both ends, and are parallel to each other when the valve is closed. 8, the support arm 8 is longer in length than the deflection arm 4, and is arranged near the sealing surface E of the valve body 2, and furthermore, when the valve is closed, the support arm 8 is connected to the bracket 17 of both arm parts 4 and 8. The connecting shafts 9 and 10 are located near the central axis G of the housing 1, and the support arm part 8 has a length shorter than that of the support arm part, and the support arm part and the direction changing arm part 4 are connected to each other.
Actuating arm part 1 extending at an acute angle on the side
1 are connected to form an actuating member 3, and the tip of an actuating rod 12 of an actuating cylinder 5 attached to the upper part of the housing 1 so as to move in a direction substantially perpendicular to the central axis G of the housing 1 is an actuating arm portion. 1
The distal end of the actuating arm portion 11 is pivotally attached to the distal end of the actuating arm 11 by a connecting shaft 19 so that it can reciprocate on an arc centered on the connecting shaft 10' when the actuating rod 12 moves linearly.

Hereinafter, preferred embodiments of this invention will be described with reference to the drawings.

1A and 1B show a first embodiment, in which a housing 1 with a flange 27 has a circumferential valve seat 7 on its inner surface, and a valve body 2 is attached to the valve seat 7. The outer edge 6 of the valve seat 7 is airtightly crimped via a seal ring provided on the valve seat 7, the outer edge 6, or both. The necessary crimping force is transmitted via an actuating cylinder 5 mounted at the top of the housing 1. The working cylinder 5 is
The piston rod is inserted into the housing 1 and serves as an operating rod 12. A connecting shaft 13 is connected to the tip of the actuating rod 12, and its free end is connected via a connecting shaft 19 to the outer end of an actuating arm portion 11 constituting one arm portion of the actuating member 3. The actuating member 3 is designed in this embodiment as an angle bar, which is rotatably mounted on a housing bracket 18 fixed in the housing 1 via a connecting shaft 10'. The support arm part 8 constituting the other arm part of the actuating member 3 located on the opposite side of the actuating arm part 11 with respect to the connecting shaft 10' has its outer end approximately at the same height as the central axis G of the housing 1. The valve body 2 is connected to a center bracket 17 that projects into the housing 1 via a connecting shaft 10 provided in the valve body 2 . One end of the deflection arm portion 4 is connected to this bracket 17 via a connecting shaft 9 at a location that is far away from the sealing surface E of the valve body 2 in the axial direction, and the other end is connected to an extension of the housing bracket 18. The connecting shaft 9' is connected to the connecting shaft 9'. Further, a counterweight 21 is attached to the free end of the bracket 17, which enables quick closing of the valve in an emergency.

As shown in FIG. 2B, the shackle 13 is attached to the tip of the actuating rod 12 in a symmetrical position across the vertical plane V. Actuation arm part 11
is inserted.

The bracket 17 and also the bracket 18 are divided into two parts which, like the shaft 13, occupy a symmetrical position with respect to the vertical plane V, and between which the bearing bolts forming the connecting shafts 10, 10' are accommodated. are doing. Two deflection arms 4, which are also arranged symmetrically with respect to the vertical plane V, are also attached to the outside of the brackets 18 and 17,
It plays the role of positioning the connecting shafts 9, 9'. A counterweight 21 positioned within the vertical plane V is inserted and connected between the tips of the two brackets 17. This makes the overall structure extremely compact.

In this embodiment, the distance between the connecting shafts 9, 9' of the deflection arm section 4, that is, the effective length of the deflection arm section 4, is determined by the distance between the coupling shaft 10 of the bracket 17 and the support arm section 8; Bracket 17 and direction changing arm section 4
and the connecting shaft 9.
The effective length of the deflection arm section 4 is shorter than the effective length of the support arm section 8, that is, the length between the support shafts 10, 10'. The connecting shaft 9' between the bracket 18 and the deflection arm 4 is further away from the sealing surface E than the connecting shaft 10' of the actuating member 3. The positions of the connecting shafts 9, 9', 10, and 10' are such that the deflection arm part 4 and the support arm part 8 are parallel to each other when the valve is closed, and both are approximately parallel to the sealing surface E of the valve body 2. It is determined that

Further, in this embodiment, the actuating arm portion 11 as the actuating member 3 and the support arm portion 8 form an acute angle with each other on the side of the direction changing arm portion 4, and the actuating arm portion The effective length of 11 is somewhat shorter than that of support arm 8.

In this embodiment, therefore, the direction of movement of the actuating rod 12 of the actuating cylinder 5 can be arranged in a virtually vertical R direction. The position of the actuating cylinder 5 configured for linear motion is relative to the connecting shaft 19 of the actuating arm portion 11 with respect to the actuating member 3.
The arcuate trajectory of the actuating rod 12 is determined so that it does not deviate significantly from the linear trajectory of the operating rod 12, and the deviation can be absorbed by the relatively short shackle 13.

Therefore, in this embodiment, when the actuating rod 12 is pushed up, both arm portions 8,
11 and the deflection arm section 4 rotate counterclockwise.

The valve body 2 is then first pulled away from the valve seat 7 approximately along the central axis G of the housing 1 . Since the deflection arm section 4 is shorter than the support arm section 8, it rotates more than the support arm section 8, and the valve body 2 rotates around the connecting shaft 10. The valve reaches a valve opening position substantially parallel to the central axis G of the valve. The connecting shaft 19 at the outer end of the operating arm portion 11 is connected to the connecting shaft 19 when the operating rod 12 moves linearly.
It reciprocates on an arc centered at 0', which is possible because a shackle 13 is provided between the actuating rod 12 and the actuating arm 11.

In this embodiment, the connecting shafts 9, 9', 10, 1
0', 19 are all positioned and movable within the cavity Q of the housing 1.

Most of the following embodiments have the same configuration as the first embodiment, so parts with the same functions are given the same reference numerals, and differences from the previously described embodiments will be mainly explained. do.

In the second embodiment shown in FIG. 2, the actuating member 3 is formed as a triangular plate in which the support arm part 8 and the actuating arm part 11 are connected by a plate-like body. In order to cope with the arcuate trajectory of the connecting shaft 19, the actuating cylinder 5 is mounted on a swing bearing 14 of the housing 1.
is supported by. A movable compensator 29 is provided for keeping the housing 1 airtight at the location where the operating cylinder 5 is attached.

In the third embodiment shown in FIG. 3, the actuating cylinder 5 is fixed to the housing 1. The connecting shaft 19 is attached to the tip of the operating rod 12 by a bolt 15, and is connected so as to be able to be displaced within a slit 16 provided in the triangular operating member 3 in order to maintain its arcuate trajectory. This slit 16 has its vertical axis aligned with the actuating arm portion 1 of the actuating member 3.
1, that is, the direction in which the connecting shaft 19 and the connecting shaft 10' of the actuating member 3 to the bracket 18 are connected when the valve is closed.

The actuating cylinder 5 is mounted at right angles to the central axis G of the housing 1 in this embodiment.

In the fourth embodiment shown in FIG. 4, a shackle 13 connected to the free end of the actuating rod 12 is mounted on the triangular actuating member 3 in a direction that makes an acute angle with the direction of movement R of the actuating rod 12. It is adapted to be able to be displaced within the guide hole 30 that is formed. The longitudinal axes of the shackle 13 and the guide hole 30 are along the direction of the actuating arm portion 11 of the actuating member 3. That is, this axis points towards the connecting axis 10' between the actuating member 3 and the bracket 18. This structure also allows the actuating cylinder 5 to be fixed to the housing 1 in this embodiment.

This invention is as described above, and the operating arm part is connected to the support arm part and is shorter in length than the support arm part and extends at an acute angle on the side of the support arm part and the deflection arm part. The tip of the actuating rod of the actuating cylinder attached to the upper part of the housing is attached to the tip of the actuating arm so that the actuating cylinder moves in a direction substantially perpendicular to the central axis of the housing. Since the tip of the arm part is pivoted by the connecting shaft 19 so that it can reciprocate on an arc centered on the connecting shaft 10', the rotation angle of the operating arm part can be made smaller than 90 degrees, and the connecting shaft 19 The arcuate locus of the actuating cylinder can be prevented from deviating significantly from the linear locus of the actuating rod of the actuating cylinder, and the linear motion of the actuating rod can be converted into rotational movement of both arms of the actuating member and the direction changing arm. Therefore, when the valve is closed, the valve body, which is crimped onto the valve seat provided in the housing, is forcibly separated from the valve seat by the support arm connected to the operating arm and the deflection arm when the valve is opened. In a shutoff valve that is designed to move to the open position by rotating 90 degrees, the linear motion of the operating rod of the operating cylinder is efficiently transmitted to the force that opens and closes the valve body, allowing the valve body to open and close smoothly. , can be carried out smoothly and reliably.

Additionally, the fact that the operating rod moves in a direction perpendicular to the center axis of the housing means that most of the rotational force that attempts to rotate the housing is transferred to the operating cylinder attached to the top of the housing due to the reaction force from the valve body. Therefore, the unbalanced load will not act on the joint of the conduit on the housing attached to the conduit, and the unbalanced load will reduce the sealing force of the joint seal, causing leakage or damage to the housing. There is no need to increase the wall thickness of the housing in order to increase the strength of the housing, and it is possible to provide an excellent valve with high reliability at a low cost. Further, since the actuating cylinder is attached to the upper part of the housing, the installation area of the valve in a planar space can be reduced, and the arrangement when multiple piping is installed can be made compact.

Furthermore, the connecting shaft 10', which has one end pivotally connected to the center bracket and the other end pivotally connected to the housing bracket, simply supports the weight of the valve body, is not subjected to rotational moment, and has a long length. In addition, it is short and receives less bending moment due to the weight of the valve body, so its diameter can be made small, and the bearing part does not need to be strong. It is effective.

[Brief explanation of the drawing]

Fig. 1A is a partially cutaway front view of the first embodiment of this invention, Fig. 1B is a side view taken along the arrow B of the same above, and Figs. FIG. 3 is a partially cutaway front view of the embodiment. DESCRIPTION OF SYMBOLS 1... Housing, 2... Valve body, 3... Actuation member, 4... Direction change arm part, 5... Actuation cylinder,
8...Support arm part, 9, 9', 10, 10', 1
9... Connection shaft, 11... Operating arm section, 12...
Operating rod (piston rod), 13... Connection shaft, 17... Center bracket, 18, 18'
...Housing bracket, Q...Housing cavity, G...Housing center axis, R...Movement direction, E...Sealing surface.

Claims (1)

[Claims for Utility Model Registration] 1. Comprising a rotary disk-shaped valve body 2 incorporated in a housing 1 and its operating cylinder 5, the operation of the operating cylinder 5 causes the valve body 2 to open when the valve is closed. In a valve opening/closing device for a shutoff valve, the outer peripheral edge is pressed against a valve seat 7 provided in a housing 1, and when the valve is opened, the valve body 2 is rotated by 90 degrees and moved to the valve open position. A center bracket 17 is provided protrudingly provided in the housing 1, and a housing bracket 18 is provided protrusively provided in the housing 1, and both ends of the brackets 17, 18 are pivotally connected to the two brackets by connecting shafts 9, 9' and 10, 10'. , and is connected by a deflection arm section 4 and a support arm section 8 that are parallel when the valve is closed, and the support arm section 8 is longer than the deflection arm section 4 and is located near the sealing surface E of the valve body 2. Furthermore, when the valve is closed, the connecting shafts 9 and 10 of both arm parts 4 and 8 with the bracket 17 are located near the central axis G of the housing 1, and the support arm part 8 has a length longer than that of the support arm part. An actuation member 3 is formed by connecting a short actuation arm portion 11 that extends at an acute angle between the support arm portion and the direction changing arm portion 4, and
The tip of the actuating rod 12 of the actuating cylinder 5, which is attached to the upper part of the housing 1 so as to move in a direction substantially perpendicular to the central axis G of the housing 1, is attached to the tip of the actuating arm section 11 when the actuating rod 12 moves linearly. A valve opening/closing device for a shutoff valve, characterized in that the tip of the operating arm portion 11 is pivotally attached to a connecting shaft 19 so as to be able to reciprocate on an arc centered on the connecting shaft 10'. 2. The valve opening/closing device according to claim 1, wherein a connecting shaft 13 is connected to the operating rod 12 of the operating cylinder 5, and a free end of the connecting shaft 13 is connected to the operating arm portion 11 by a connecting shaft 19. 3. A connecting shaft 13 is connected to the operating rod 12 of the operating cylinder 5, and the free end thereof is connected by sliding in a guide hole 30 provided in the operating arm portion 11. The valve opening/closing device according to scope 1. 4. The valve opening/closing device according to claim 1, wherein the operating cylinder 5 is attached to the housing 1 using a swing bearing 14. 5. The valve opening/closing device according to claim 1, wherein the operating rod 12 of the operating cylinder 5 is connected via a connecting shaft 19 so as to be displaceable within the slit 16 of the operating member 3. 6 The connecting shaft 19 of the operating rod 12 is connected to the housing cavity Q.
The valve opening/closing device according to claim 1, which is installed in the utility model. 7. The valve opening/closing device according to claim 1, in which a counterweight 21 is attached to the outer end of the center bracket 17. 8. The valve opening/closing device according to claim 2, wherein the connecting shaft 19 of the connecting shaft 13 is installed in the housing cavity Q.