KR102589246B1 - preaction valve - Google Patents

Abstract

The present invention relates to a preaction valve, and more specifically, to relieve damage to the body and disk by relieving the shock that occurs when the disk provided inside the body and blocking the fluid is opened and collides with the inner surface of the body. It relates to a preaction valve that can prevent a decrease in sealing force due to hardening of the disk packing even when used for a long time.
The present invention for achieving the above object includes a body having a space inside, an inlet formed at the bottom of the body through which external fluid flows in, an outlet formed at the top of the body through which fluid is discharged, and A disk installed inside the body to open and close the inlet, a locking lever rotatably installed on one side of the disk to fix the disk, and a diaphragm formed on one side of the body to operate a push bar that controls the locking lever. It is characterized by being made up of parts.

Description

Preaction valve {preaction valve}

The present invention relates to a preaction valve, and more specifically, to relieve damage to the body and disk by relieving the shock that occurs when the disk provided inside the body and blocking the fluid is opened and collides with the inner surface of the body. It relates to a preaction valve that can prevent a decrease in sealing force due to hardening of the disk packing even when used for a long time.

In general, water flow detection devices are divided into wet, dry, and pre-operated valves. Wet water flow detection devices maintain the fluid coexistence on the primary side where fluid (pressurized water) flows in and the secondary side where fluid (pressurized water) is discharged. In case of a fire, the sealed part of the sprinkler head (closed type) is melted or separated by heat and the head is opened, the pressurized water on the secondary side is discharged and the secondary pressure decreases, sending a signal from the pressure switch to the alarm device and operating the fire pump. It is a method of continuously supplying fire extinguishing water. The dry water detection device injects nitrogen gas or compressed air into the valve to balance the pressurized water on the primary side. When the head is opened due to a fire, the pressure is lowered and the chamber inside the valve opens, causing 1 This is a system that supplies pressurized water to the side of the vehicle.

In addition, the pre-action valve (pre-action valve) maintains atmospheric pressure without gas or compressed air on the secondary side, and when a fire occurs, the detector operates. When the pre-action valve is activated, the water flow detection device operates, and fire extinguishing water is supplied to the closed head. , a closed sprinkler head is opened by heat.

All three of the above-mentioned types are different, but the dry type and the pre-operation type have something in common in that the secondary side is not normally filled with water, so it has been legislated to install the two types in parking lots, etc., excluding the wet type, which requires pressurized water due to the risk of freezing. there is.

Among these valves, an example of a pre-action valve (preaction valve) is the technology described in Korean Patent No. 10-1631050 (registered on June 9, 2016) as shown in Figures 1 and 2, the technical feature of which is the inner A body 10 in which a communication hole 12 is formed, a seat ring 14 installed in the communication hole 12 of the body 10, one side is hinged to the body 10, and the other side is free. A disk 20 formed in a single stage, the outer surface of which selectively opens and closes the communication hole 12 by selectively contacting the seat ring 14, is disposed in contact with the outer surface of the disk 20, and the seat ring 14 ) and a disk packing (30) in contact with the disk to maintain airtightness, and a disk washer (40) that is in contact with the outer surface of the disk packing (30) and is screwed to the disk (20), and the disk packing (30) ), a bent portion 32 surrounding the edge of the disk washer 40 extends around the disk, and a reinforcing portion surrounding the bent portion 32 of the disk packing 30 protrudes downward on the disk 20. The disk washer 40 has a step portion 42 formed on the edge, and the step portion 42 is inserted into the bent portion 32 of the disk packing 30. Do it as

However, the technology described in Korean Patent No. 10-1631050 (registered on June 9, 2016) allows the bent portion 32, which is bent and extended in a U shape on the disk packing 30, to be separated from the surface of the disk washer 40. There is an advantage in that pressure sealing can be performed efficiently by pressing the seat ring 14 while forming a gap and deforming outward by hydraulic pressure. However, since the bent portion 32 is formed thin and continuously deformed, it hardens easily when used for a long time. There is a problem that cracks may occur and the sealing force may be reduced as a result.

In addition, when the valve is opened, the disc 20 and the body are damaged by the shock generated when the disc 20 collides with the inner surface of the body 10 due to the pressure of the fluid flowing in through the communication hole 12. There is a problem that (10) is easily damaged.

Korean Patent No. 10-1631050 (registered on 2016.06.09)

The present invention was devised to solve the above-mentioned problems. The purpose of the present invention is to provide a disc inside the body to block the fluid by sealing the seat ring installed at the inlet, and to open the disc in case of a fire to protect against sprinklers, etc. Fluid is supplied, and by providing a buffer member on the outside of the disc, a pre-action valve is provided to reduce the impact when the disc collides with the inner surface of the body when opened, thereby preventing damage to the disc and body. It is done.

Another object of the present invention is to install a disk packing on one side of the disk in order to seal the seat ring installed in the inlet, an insertion groove is formed in the packing seating portion of the disk, and an insertion groove is formed on one side of the disk packing. A corresponding insertion protrusion is formed, and the position of the insertion protrusion is installed to correspond to the position of the seat ring, so that even if the seat ring is compressed by the force pressing the disk packing, the overall compression ratio is minimized to prevent a decrease in sealing force due to hardening. The goal is to provide a preaction valve that can

The present invention to solve these problems;

A body having a space inside, an inlet formed in the lower part of the body through which external fluid flows in, an outlet formed in the upper part of the body through which fluid is discharged, and installed on the inside of the body to open and close the inlet. It is characterized by consisting of a disk, a locking lever rotatably installed on one side of the disk to fix the end of the disk, and a diaphragm portion formed on one side of the body to operate a push bar that controls the locking lever.

Here, a buffer member is further installed on the upper surface of the disk, and a coupling protrusion is formed to protrude on the upper surface of the disk, and a coupling groove into which the coupling protrusion is inserted is formed in the lower part of the buffer member.

At this time, a locking protrusion is formed to protrude on a side of the engaging protrusion, and a locking groove into which the locking protrusion is inserted is formed on a side of the engaging groove.

Meanwhile, a packing seating portion in which the disk packing is installed is formed on the lower edge of the disk, an insertion groove is formed in the packing seating portion, and the disk packing is characterized in that an insertion protrusion that is inserted into the insertion groove is formed to protrude. .

Here, the insertion groove and the insertion protrusion are characterized in that they are formed to correspond to the position of the seat ring installed in the inlet.

According to the present invention of the above-described configuration, a disk is provided inside the body, and the seat ring installed at the inlet is sealed to block fluid. In the event of a fire, the disk is opened to supply fluid to sprinklers, etc., and the outer side of the disk is By providing a buffer member, there is an effect of reducing the impact when the disc collides with the inner surface of the body when opened, thereby preventing damage to the disc and the body.

In addition, in the present invention, a disk packing is installed on one side of the disk to seal the seat ring installed in the inlet, an insertion groove is formed in the packing seating portion of the disk, and an insertion groove corresponding to the insertion groove is formed on one side of the disk packing. A protrusion is formed, but the position of the insertion protrusion is installed to correspond to the position of the seat ring, so that even if the seat ring is compressed by the force pressing the disk packing, the overall compression ratio is minimized, which has the effect of preventing a decrease in sealing force due to hardening. There is.

1 is a cross-sectional view of a conventional ready-to-act valve.
Figure 2 is a cross-sectional view showing a modification of a conventional pre-operation valve.
Figure 3 is a cross-sectional view of the preaction valve according to the present invention.
Figure 4 is an enlarged view of the disk of the preaction valve according to the present invention.
Figure 5 is a cross-sectional view of the disc of the preaction valve according to the present invention in an open state.
Figure 6 is an enlarged view of the portion where the disc packing and seat ring of the preaction valve according to the present invention are in contact.
Figure 7 is an enlarged view of a portion where the disc packing and the seat ring of the preaction valve according to another embodiment of the present invention are in contact.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. The same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted. Additionally, it should be understood that the present invention can be implemented in many different forms and is not limited to the described embodiments.

Figure 3 is a cross-sectional view of the preaction valve according to the present invention, Figure 4 is an enlarged view of the disk of the preaction valve according to the present invention, and Figure 5 is a cross-sectional view of the disk of the preaction valve according to the present invention in an open state. , Figure 6 is an enlarged view of the portion where the disc packing and seat ring of the preaction valve according to the present invention are in contact.

The present invention relates to a preaction valve, and as shown in FIGS. 3 to 6, the structure includes a body 100 with a space inside and an inlet formed at the lower part of the body 100 through which external fluid flows. It consists of an outlet 120 formed on the upper part of the body 100 and the body 100 through which fluid is discharged, and a disk 150 installed inside the body 100 to open and close the inlet 110.

Here, a hinge portion is formed at one end of the disk 150 to be rotatable, and a locking lever 190 for fixing the end of the disk 150 is installed at the other side of the disk 150. A hinge is formed at the bottom of the lever 190 so that it can rotate, and a locking member 192 formed on one side supports the upper surface of the end of the disk 150 and fixes the disk 150 to seal the inlet 110. do.

At this time, a diaphragm part 130 is formed on one side of the body 100, and a diaphragm 132 is installed inside the diaphragm part 130, and the diaphragm 132 moves back and forth by the diaphragm 132. A push bar 140 is installed.

Therefore, the push bar 140 moves back and forth by the operation of the diaphragm unit 130, and the locking lever 190 supported on the end of the push bar 140 rotates accordingly to control the opening and closing of the disk 150. I do it.

Therefore, in normal times, the locking member 192 of the locking lever 190 presses the upper surface of the end of the disk 150 so that the disk 150 maintains the inlet 110 in a sealed state, and in case of fire, the diaphragm The pressure acting on the unit 130 causes the push bar 140 to move rearward and the locking lever 190 to rotate, causing the disk 150 to rotate to open the inlet 110 and allow water to flow through the outlet 120. Supply fluid to sprinklers, etc. to extinguish the fire.

Meanwhile, a buffering member 180 may be further installed on the upper surface of the disk 150. The buffering member 180 is made of an elastic material such as rubber or synthetic rubber and is used in the process of opening the disk 150. The shock that occurs when the inner surface of the disk 150 and the body 100 collide is resolved.

Here, an engaging protrusion 158 is formed on the upper surface of the disk 150 to protrude upward, and an insertion groove 182 into which the engaging protrusion 158 is inserted is formed on the lower part of the buffer member 180 to prevent interference. It is joined by insertion method.

At this time, a locking protrusion 159 is formed on the side of the coupling protrusion 158 to protrude outward, and a locking groove 184 into which the locking protrusion 159 is inserted is formed on the side of the coupling groove 182. You can.

Therefore, even if an external force acts on the buffer member 180 inserted into the coupling protrusion 158 by the locking protrusion 159 and the locking groove 184, it is prevented from being separated arbitrarily, so that the disk 150 and the body can be maintained even when used for a long time. The shock that occurs when (100) collides is stably resolved.

In addition, a packing seating portion 152 is formed on the lower edge of the disk 150, and a disk packing 160 for sealing the seat ring 112 is installed on the picking seating portion 152.

Here, a concave insertion groove 154 is formed in the inner direction of the disk 150 in the packing seating portion 152 formed on the lower surface of the disk 150, and the insertion groove 154 is formed on the upper surface of the disk packing 160. The insertion protrusion 162 is formed to protrude upward so as to be inserted into (154).

At this time, a disc-shaped disc washer 170 is further provided at the lower part of the disc 150, and a fixing bolt 174 is provided at the center of the disc washer 170 to be coupled to the lower part of the disc 150. , Support wings 172 are formed on the edge of the disk washer 170 to support the inner side of the disk packing 160 to fix the disk packing 160 so that it does not separate.

Meanwhile, the insertion protrusion 162 formed on the upper part of the disk packing 160 and the insertion groove 154 formed on the lower surface of the disk 150 are formed to correspond to the position of the seat ring 112.

Therefore, when the disk 150 closes the inlet 110, the portion where the seat ring 112 presses the disk packing 160 is made thicker, so that the seat ring 112 acts as a disk packing 160. Even if the disk packing 160 is compressed by the force pressing (160), the overall compression ratio is minimized so that it does not harden easily even when used for a long time. Accordingly, when the inlet 110 is closed, the hardening of the disk packing 160 is prevented. This prevents a decrease in sealing force due to

In another embodiment of the present invention, as shown in FIG. 7, a seating groove 164 may be further formed in the lower portion of the disk packing 160 at a portion where the seat ring 112 contacts. By inserting the seat ring 112 into (164), a wider portion is brought into contact, thereby increasing the sealing force.

Of course, the degree to which the disc packing 160 is pressed is reduced by the seating groove 164, making it possible to more reliably prevent the disc packing 160 from hardening.

Although the preferred embodiments of the present invention have been described above, the scope of the rights of the present invention is not limited thereto, and the scope of the rights of the present invention extends to the scope substantially equivalent to the embodiments of the present invention. Various modifications can be made by those skilled in the art without departing from the above.

The present invention relates to a preaction valve, and more specifically, to relieve damage to the body and disk by relieving the shock that occurs when the disk provided inside the body and blocking the fluid is opened and collides with the inner surface of the body. It relates to a preaction valve that can prevent a decrease in sealing force due to hardening of the disk packing even when used for a long time.

100: body 110: inlet
120: outlet 130: diaphragm part
140: push bar 150: disk
160: disk packing 170: disk washer
180: Buffering member 190: Locking lever

Claims (5)

A body with a space formed inside,
an inlet formed in the lower part of the body through which external fluid flows;
an outlet formed at the top of the body through which fluid is discharged;
A disk installed inside the body to open and close the inlet,
a locking lever rotatably installed on one side of the disk to secure an end of the disk;
It consists of a diaphragm portion formed on one side of the body to operate a push bar that controls the locking lever,
A packing seating portion in which disk packing is installed is formed on the lower edge of the disk,
An insertion groove is formed in the packing seating portion,
An insertion protrusion that is inserted into the insertion groove is formed to protrude on the disk packing,
The insertion groove and insertion protrusion are formed to correspond to the position of the seat ring installed in the inlet,
A disc-shaped disc washer is further provided at the lower part of the disc,
A fixing bolt is provided at the center of the disc washer and is coupled to the lower part of the disc,
A preaction valve, characterized in that a support wing is formed on the edge of the disk washer to support the inside of the disk packing to prevent the disk packing from being separated.
According to paragraph 1,
A buffer member is further installed on the upper surface of the disk,
A coupling protrusion is formed on the upper surface of the disk,
A preaction valve, characterized in that a coupling groove into which the coupling protrusion is inserted is formed in the lower part of the buffer member.
According to paragraph 2,
A locking protrusion is formed protruding on the side of the engaging protrusion,
A preaction valve, characterized in that a locking groove into which the locking protrusion is inserted is formed on a side of the coupling groove.
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