KR200330628Y1 - The locking structure of shaft for butterfly valve - Google Patents

Abstract

The present invention relates to a locking structure of a rotating shaft applied to a butterfly valve, and more specifically, to install a support through which a mounting hole is drilled between a valve body and a reducer, and having a flat bottom on a part of the outer circumferential surface of the rotating shaft. The locking groove has a locking groove, but the locking piece which can change the protruding degree of the inner end according to the fixing direction is detachably fastened through the fastening hole eccentric to one inner wall of the support, so that the inner end of the locking piece is rotated when the valve is in operation. In order to restrain the rotation axis of the valve according to the user's need, such as maintenance replacement, the inner end of the locking piece is forced to restrain the rotation by restraining the rotation axis. Ensure the structure is concealed inside the support to prevent wear or damage To maintain the accuracy of the extension to the operation of the service life, and to a to prevent the increase of durability and failures and malfunctions and configured to have a strong resistance to the force moment generated a locking structure in the rotation direction of the rotation axis.

Description

LOCKING STRUCTURE OF SHAFT FOR BUTTERFLY VALVE}

The present invention relates to a locking structure of a rotating shaft applied to a butterfly valve used to supply or cut off various types of water (drinking water, industrial water, agricultural water, etc.), and more specifically, even in a state of supplying various types of water. To securely and easily repair and repair, install a support hole through which the installation hole is drilled between the valve body and the reducer, and at the same time, place a locking groove having a flat bottom on a part of the outer circumferential surface of the rotating shaft, and eccentrically tightening the inner wall of one side of the support. When the valve is operated, the inner end of the locking piece is spaced apart from the rotating shaft so as to be detachably fastened so that the protrusion of the inner end can be changed according to the fixed direction through the ball. If the user wants to restrain the axis of rotation of the valve, the inner end of the locking piece It is designed to restrain the rotation by contacting the groove, and the structure constraining the rotating shaft is installed in a concealed state inside the support, so that it can maintain the extension of service life and the precision of operation by preventing wear or damage. It is configured to have a strong resistance to the moment generated in the direction of rotation of the rotary shaft to improve the durability and to prevent failure and malfunction.

In general, a butterfly valve for supplying and cutting off various types of water has a great force on the disk because the valve opens and closes the disk at a pressure of 2-7 kg / cm 2.

In the case of opening and closing the disc by manual or electric movement, the drive shaft is rotated to open and close the disc by the reduction gear. At this time, the opening and closing angle of the disc is opened and closed. Although it was known by the indicator (Indicator), if the disc was installed with an error in the opening, an accident may occur that deviates from the opening and closing angle of the disc. This kind of accident is actually occurring frequently in the field. When maintenance replacement is required due to wear and damage of the reduction gear constituting the reduction gear, it was necessary to disassemble the reduction gear of the reduction gear. At this time, it is necessary to fix it so that the rotating shaft supporting the disk does not rotate. Stop water supply, repair and water Were hayeoyaman.

If the decelerator is disassembled in the presence of pressure or flow velocity of water flowing through the pipe, the rotating shaft supporting the disk will rotate arbitrarily by the flow velocity or hydraulic pressure, and water hammer There was a risk of causing a large accident that damages the valve body due to the water hammer phenomenon.If only the reduction gear is replaced, a wedge-shaped steel is fixed to the rotating shaft by welding to fix it. If the welding work was carried out and repaired but the work space was narrow and the working conditions were poor, and the perfect welding was not performed, the welding part may be damaged during the work, which also causes the risk of human injury. The preconditions for watering and draining various water flowing through the pipe As it had to be followed, it resulted in time and economic loss, and it was very inconvenient to use the water according to the singular number, and according to the current regulations, it was necessary to replace the repair only when the regular inspection period of three years came.

Conventionally, the invention is known as Korean Patent Publication No. 2000-27090 "Butterfly Valve" to stop the rotation of the rotating shaft even in the state of supplying various water,

It is installed on both sides of the center of the disk, and the outer end surface of one rotating shaft having a function of opening and closing the disk at an angle of 90 ° forms a semicircular protrusion, and the bonnet of the bonnet is installed outside the shaft. A quarter circular protrusion is formed on the inner end, but a semicircular protrusion is formed on the outer end, so that the bonnet can be easily supplied even when water is supplied in the process of supplying water or cutting water. By disassembling the internal and external cross sections and installing them, the rotating shaft is fixed and the disc is opened at an angle of 90 ° so that it can be easily repaired and repaired even when the water is supplied. There was this.

⊙ One part of the bonnet's protrusion that constrains the rotating shaft is exposed to the outside, which increases the chance of contact with external force, which increases the risk of abrasion and damage, making it difficult to shorten the service life and maintain the precision of operation.

⊙ In order to suppress the rotation of the rotating shaft, the projecting part is formed through the step groove at the end of the rotating shaft, but such structure has a weak fracture resistance at the side, so that when the hydraulic pressure of the water acts strongly, it is structural such as cracking, cutting or bending at the interface. There was a problem that causes the anxiety factors that cause the deformation and malfunction of the operator to threaten the safety of workers.

The present invention was devised to solve and solve all the structural problems caused by the conventional butterfly valve as described above,

The purpose of the present invention is to provide a structure that restrains the rotating shaft in a concealed state inside the support to prevent abrasion or damage to maintain the extension of the service life and the precision of the operation, and to generate the moment in the direction of rotation of the rotating shaft To provide a locking structure of the butterfly valve that can prevent the occurrence of failure and malfunction through the strong durability by configuring the locking structure to have a strong resistance to the

Hereinafter, the configuration of the present invention in detail based on the accompanying drawings.

1 shows an example of the configuration of a butterfly valve to which the present invention is applied

Front illustration.

Figure 2 is an exploded perspective view of the main portion of the present invention.

Figure 3 is an exemplary cross-sectional view showing a main portion of the present application application state.

Figure 4 (A) (B) (C) is an exemplary cross-sectional view showing various application positions of the locking piece to be applied to the present invention.

※ Explanation of code for main part of drawing ※

1: valve body 2: valve seat

3: disc 4,4 ': rotating shaft

5,5 ': Bearing part 6: Worm wheel

8: Reducer 10: Support

11: Mounting hole 20, 20 ': Side and bottom thread holes

30: Locking piece 31, 31 ': Long side, ground plane

32: Fastener 40: Locking Home

1 is a front view illustrating an example of a configuration of a butterfly valve to which the present invention is applied, FIG. 2 is an exploded perspective view illustrating an essential part of the present invention, and FIG. 3 is a partial cross-sectional view illustrating an application state of the present invention. 4 is a cross-sectional view showing various application positions of the locking piece to be applied to the present invention.

The present invention provides an inner end of the rotating shaft (4) (4 ') to both sides of the center surface of the disk (3) having a function of supplying and cutting various kinds of water by rotating movement in the valve seat (2) of the valve body (1) The outer end of the rotary shaft 4 has a worm wheel (6) and the worm wheel (6) is interlocked with the worm wheel (6). In the known structure in which the reducer 8 is formed by installing a);

A support 10 fixedly installed between the valve body 1 and the speed reducer 8 and having a plurality of installation holes 11 penetrated to an outer circumferential surface thereof;

Side and bottom screw holes (20) (21) which are drilled in a state in which they are perpendicular to each other on one sidewall of the support (10) in contact with the reducer (8);

Selectively attachable and detachably fixed to one of the side and bottom screw holes 20 and 21 of the support 10 in a state having straight long and short side ground surfaces 31 and 31 'on both sides. A locking piece 30 which allows the projecting degree of the ground plane toward the rotation shaft 4 to be changed in accordance with the fixing direction through a set of fastening holes 32 eccentric to a predetermined width at CL;

The concave portion is configured to have a depth equal to or slightly larger than the eccentric width of the fastening hole 32 while having a flat bottom on the outer periphery of the rotating shaft 4 corresponding to the locking piece 30. Each of the locking groove 40 is configured to face the side screw hole 20 and face the bottom screw hole 21 in the open state of the valve.

Referring to the operation of the present invention configured as described above are as follows.

In the case of supplying or cutting various kinds of water, the disk (3) is fixed by driving the worm and the worm wheel 6 engaged therewith by manual or electric movement so that the rotary shafts 4 and 4 'are rotated. The function of supplying or cutting off various types of water by rotating or opening the valve seat 2 is the same as that of the known art.

On the other hand, Fig. 4 (A) shows the attachment state of the locking piece 30 in the state that the rotating shaft 4 is rotatable through the reducer (8), the side or bottom screw hole (20, 20 ') When the locking piece 30 which is selectively fastened to the locking piece 30 is fixed so that the short side ground plane 31 ′ on the short side with respect to the center of the fastening hole 32 faces the rotation shaft 4, the short side ground plane 31 ′ is rotated. Since the locking piece 30 does not interfere with the rotation of the rotating shaft 4 at all because it is separated from each other without being in contact with each other, it is possible to freely adjust the disk 3, which is normally applied when maintenance or repair is not required. It is a state.

On the other hand, if the butterfly valve is damaged and requires repair and repair, and the repair is required while the valve is shut off to shut off the water, the closed state of the valve must be artificially maintained.

First, by using the mounting hole 11 in the state that the locking groove 40 formed in the rotating shaft 4 to the position facing the side screw hole 20 by forcibly rotating the disk 3 to the closed position ( 10) remove the locking piece 30 and then reverse the locking piece 30 as shown in FIG. 4 (B) so that the long side ground surface 31 is the bottom of the locking groove 40. When the bolt is inserted into the fastening hole 32 of the locking piece 30 in the state that it is in contact with the side screw hole 20, the long side ground surface 31 of the locking piece 30 integrally coupled with the support 10 ) Is in contact with the bottom of the locking groove 40 in parallel to the rotational shaft 4 is fixed in the closed position, the rotation is suppressed to be able to repair in the state of maintaining the closed state of the valve.

On the other hand, when the valve is required to be repaired in the state of continuously supplying water by opening the valve, the open state of the valve must be artificially maintained.

In this case, as shown in FIG. 4C, the disk 3 is forcibly rotated to the open position so that the locking groove 40 formed in the rotation shaft 4 is in a position facing the bottom screw hole 20 ′. Then, the locking piece 30 is separated from the support 10 by using the installation hole 11, and then the long side ground surface 31 of the locking piece 30 is the locking groove 40 as shown in FIG. Longitudinal ground of the locking piece 30 integrally coupled with the support 10 when the bolt is inserted into the fastening hole 32 of the locking piece 30 and the bottom screw hole 20 ' Since the surface 31 is in contact with the bottom of the locking groove 40 in parallel with the rotation shaft 4 is fixed in the open position, the rotation is suppressed to be able to repair in the state of maintaining the open state of the valve.

As such, the present invention allows the structure constraining the rotating shaft to be installed in a concealed state inside the support to prevent wear or damage, thereby maintaining the extension of the service life and the precision of the operation, and the moment generated in the rotational direction of the rotating shaft. The locking structure is constructed to have strong resistance to resist, which can prevent the occurrence of malfunction and malfunction through strong durability.

It is a useful design to prevent the reduction of civil complaints and relieve discomfort in high numbers.

Claims (1)

Rotating shafts 4 (2) on both sides of the center surface of the disk 3 having a function of supplying and cutting various kinds of water by rotating at an angle of 90 ° in the inner valve seat 2 of the valve body 1. 4 ') to fix the inner end of the reducer (5) (5') and the outer end of the rotating shaft (4) is provided with a worm wheel (worm wheel) (6) interlocking through the worm In the known structure constituting 8); A support 10 fixedly installed between the valve body 1 and the speed reducer 8 and having a plurality of installation holes 11 penetrated to an outer circumferential surface thereof; Side and bottom screw holes (20) (21) which are drilled in a state in which they are maintained at right angles to one wall of the support (10) in contact with the reducer (8); Selectively attachable and detachably fixed to one of the side and bottom screw holes 20 and 21 of the support 10 in a state having straight long and short side ground surfaces 31 and 31 'on both sides. A locking piece 30 which allows the projecting degree of the ground plane toward the rotation shaft 4 to be changed in accordance with the fixing direction through a set of fastening holes 32 eccentric to a predetermined width at CL; The concave portion is configured to have a depth equal to or slightly larger than the eccentric width of the fastening hole 32 while having a flat bottom on the outer periphery of the rotating shaft 4 corresponding to the locking piece 30. Rotating shaft locking structure of the butterfly valve, characterized in that it comprises a locking groove (40) facing the side screw hole (20) and configured to face the bottom screw hole (21) in the open state of the valve.