Alarm valve

Abstract

The alarm valve of the present invention includes a valve housing 100 in which a clapper operation space 103 of a predetermined size is formed between a primary main pipeline 101 and a secondary branch pipeline 102; a seat ring 110 provided on the inner peripheral surface of the primary main pipeline 101 as an outlet for fire water; a support ring 120 provided on the inner peripheral surface of the secondary branch pipeline 102 and having a pin hole formed at the center of a support stem 121; a guide pin 130 having one end fitted and fixed to the pin hole of the support ring 120 and the other end vertically extending toward the seat ring 110; a clapper 140 that vertically moves up and down along the guide pin 130 slidably inserted into a guide hole 141 formed at the center of the upper surface and opens and closes the primary main pipeline 101 by contacting and non-contacting with the seat ring 110; and an elastic member 160 attached to the guide pin 130 so as to be compressed when the clapper 140 rises and apply tension when the clapper 140 descends to maintain the sealing force of the clapper 140. The sealing pressure between the clapper 140 and the seat ring 110 is increased, and a setting adjustment pin 220 that contacts the back surface of the clapper 140 is provided at the tip 211 of the paddle 210 of the paddle switch 200 so as to be height-adjustable, making it easy to set and adjust the fire signal issuing switch.

Description

Technical Field

[0001] The present invention relates to an alarm valve, and more particularly, to a cylindrical alarm valve that prevents malfunction due to the risk of water leakage caused by an imbalance in the sealing pressure when the clapper performs an opening and closing operation, and is easy to set the fire signal command switch.

Background Art

[0002] Generally, an alarm valve is basically installed on the fire water supply pipeline, and is a fire protection facility that automatically notifies a control panel when the supply of fire water is started due to a fire.

[0003] Such an alarm valve is installed between the primary fire water supply pipeline and the secondary fire water supply pipeline equipped with a sprinkler. In a normal state where no fire has occurred, the alarm valve shuts off between the primary fire water supply pipeline and the secondary fire water supply pipeline.

[0004] However, when a fire occurs and the sprinkler provided on the secondary fire water supply pipeline operates to spray fire water, the flow path of the alarm valve is automatically opened by the pressure difference of the fire water between the secondary fire water supply pipeline and the primary fire water supply pipeline, so that the fire water in the primary fire water supply pipeline is continuously supplied toward the secondary fire water supply pipeline. Therefore, the fire can be suppressed early by the continuous spraying of fire water through the sprinkler.

[0005] Since the alarm valve is provided with a paddle switch whose position is variable by the fire water supplied through the primary fire water supply pipeline, when fire water is supplied due to a fire, the paddle switch automatically notifies the control panel of the occurrence of the fire.

[0006] Looking at the prior art related to such an alarm valve, there is the Republic of Korea Registered Patent No. 10-1285294 (announced on July 11, 2013) "Flow Water Detection Device for Fire Alarm Valve" disclosed in Patent Document 1 of the following prior art documents.

[0007] In Patent Document 1 mentioned above, a clapper that rotates about a hinge shaft on one side is provided so as to contact a seat ring between the primary-side fire water supply pipe (flow path) and the secondary-side fire water supply pipe (flow path) inside the valve housing, and it is configured to open and close between the primary-side fire water supply pipe and the secondary-side fire water supply pipe.

[0008] As another prior art, there is the Republic of Korea Registered Patent No. 10-2358358 (announced on February 8, 2022), "Alarm Valve" disclosed in Patent Document 2 of the following prior art documents.

[0009] In the alarm valve of Patent Document 2 mentioned above as well, a clapper that rotates about a hinge shaft is provided so as to contact a seat ring between the primary-side fire water supply pipe (flow path) and the secondary-side fire water supply pipe (flow path) inside the valve housing, and it is configured to open and close between the primary-side fire water supply pipe and the secondary-side fire water supply pipe.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0011] By the way, a clapper that rotates about a hinge shaft like the alarm valves of Patent Documents 1 and 2 above has a structural problem that when it contacts the seat ring and closes the flow path, the pressure of the fire water in the primary-side fire water supply pipe acts more greatly on the opposite side part compared to the hinge shaft part of the clapper, and there is a risk of water leakage due to the imbalance of the sealing pressure with the seat ring.

[0012] In Patent Documents 1 and 2, since the position of the paddle for operating the paddle switch is fixed, there is a problem that it is difficult to set the fire signal issuing switch.

[0013] The present invention has been devised to solve the problems of Patent Documents 1 and 2 as described above, and by making the sealing pressure at the time of closing due to the contact between the seat ring and the clapper inside the alarm valve act evenly on the entire peripheral edge of the clapper, an alarm valve is provided that prevents malfunction without the risk of water leakage.

[0014] Another object of the present invention is to provide an alarm valve in which the setting adjustment of the fire signal issuing switch is easy by making it possible to easily adjust the gap between the paddle for operating the paddle switch and the clapper.

Means for Solving the Problems

[0015] In order to achieve the above object, the present invention provides an alarm valve to which a paddle switch is attached on one side, a valve housing in which a clapper operation space of a predetermined size is formed between a primary main pipeline and a secondary branch pipeline; a seat ring provided on the inner peripheral surface of the primary main pipeline as an outlet for fire fighting water; a support ring provided on the inner peripheral surface of the secondary branch pipeline and having a pin hole formed at the center of the support stem; a guide pin having one end fitted and fixed to the pin hole of the support ring and the other end vertically provided toward the seat ring; a clapper that vertically moves up and down along the guide pin slidably inserted into a guide hole formed at the center of the upper surface and opens and closes the primary main pipeline by contacting and non-contacting with the seat ring; and an elastic member that is attached to the guide pin so as to be compressed when the clapper rises and apply tension when the clapper descends to maintain the sealing force of the clapper.

[0016] In that case, it is preferable that the clapper has only the back surface formed in a conical shape or both the back surface and the front surface formed in a conical shape in order to reduce the resistance when the fire fighting water in the primary main pipeline flows toward the secondary branch pipeline.

[0017] And, a sealing ring made of a rubber material with a round and curved surface is fitted on the inclined surface of the inner peripheral opening edge in contact with the clapper of the seat ring, and a clapper ring is fitted on the peripheral edge of the clapper in contact with the sealing ring, so that the sealing ring and the clapper ring are in line contact when the clapper descends.

[0018] Also, the clapper is formed by joining a conical upper body and a lower body facing each other to form a hollow portion inside, and a plurality of through holes for allowing fire fighting water to flow into the hollow portion are formed in the upper body so that the clapper operates sensitively. The support ring is formed such that the support rod has a V-shaped cross section in order to reduce the resistance when the fire fighting water in the primary main pipeline passes through.

[0019] And, the paddle switch is arranged such that the tip of the paddle penetrating through the side wall of the primary main pipeline is placed on the back side of the clapper, and a setting adjustment pin that contacts the back surface of the clapper is provided at the tip of the paddle so as to be height-adjustable, making it easy to adjust the setting of the fire alarm signal switch.

Advantages of the Invention

[0020] In such an invention of the present application, since the clapper that moves vertically up and down in the valve housing contacts the entire inner peripheral opening edge of the seat ring at the same time when descending to seal, the sealing pressure acts on the seat ring in a well-balanced manner, so there is no risk of water leakage, and thus there is an effect of preventing malfunction of the alarm valve.

[0021] And, since the back surface of the clapper is conical, the resistance when the fire fighting water is supplied can be significantly reduced. Also, when the clapper contacts the seat ring, the conical back surface of the clapper is in line contact with the sealing ring fitted on the inclined surface of the seat ring, so there is an effect of increasing the sealing force of the clapper.

[0022] In addition, since the gap between the paddle and the clapper can be easily adjusted, it is possible to easily and accurately perform setting adjustment of the fire alarm switch.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0024] Hereinafter, the alarm valve according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0025] The terms or words used in the present invention described below should not be construed as being limited to their conventional or dictionary meanings. The configurations shown in the embodiments and drawings described in this specification are only preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modifications that can replace them at the time of this application.

[0026] Figures 1a and 1b are end views showing the alarm valve of the present invention, showing the closed state (normal state) and the open state (operating state) of the clapper 140, respectively.

[0027] The present invention is characterized in that an alarm valve with a paddle switch 200 attached to one side is configured as a circular alarm valve using a valve housing 100, a seat ring 110, a support ring 120, a guide pin 130, a clapper 140 that moves vertically up and down, an elastic member 160, and a paddle switch 200 that is easy to adjust the setting of the paddle 210, so that when the supply of fire fighting water is started due to a fire, the control panel is automatically notified of this.

[0028] In the valve housing 100, a clapper operation space 103 for the clapper 140 to move vertically up and down without interference is formed with a predetermined size between the primary side main pipeline 101 and the secondary side branch pipeline 102.

[0029] The seat ring 110 is screwed onto the inner peripheral surface of the primary side main pipeline 101 and serves as the outlet of the fire fighting water in the primary side main pipeline 101.

[0030] The support ring 120 is screwed onto the inner peripheral surface of the secondary side branch pipeline 102, and a pin hole into which one end of the guide pin 130 is fitted is formed at the center of the support rod 121 that crosses the support ring 120.

[0031] The guide pin 130 is formed in a long rod shape, one end is fitted and fixed to the pin hole of the support rod 121 of the support ring 120, and the other end is vertically installed in the clapper operation space 103.

[0032] The clapper 140 moves vertically up and down with the guide pin 130 slidably inserted into the guide hole 141 formed at the center of the upper surface, and opens and closes the primary side main pipeline 101 by contacting and non - contacting with the seat ring 110.

[0033] The elastic member 160 is preferably composed of a coil spring, is compressed when the clapper 140 rises, and is attached to the guide pin 130 so as to apply tension when the clapper 140 descends to maintain the sealing force of the clapper 140.

[0034] When the pressures of the fire protection water in the primary main pipeline 101 and the fire protection water in the secondary branch pipeline 102 are the same as each other under normal conditions, as shown in Fig. 1a, due to the tension of the elastic member 160, the clapper 140 descends vertically along the guide pin 130, so that the back surface of the clapper 140 is simultaneously in close contact with the entire inner peripheral opening edge of the seat ring 110.

[0035] When the back surface of the clapper 140 is simultaneously in close contact with the entire inner peripheral opening edge of the seat ring 110 in this way, a uniform sealing pressure is generated, so there is no risk of water leakage compared with the conventional clapper that rotates around the hinge part.

[0036] When the fire protection water is sprinkled through the sprinkler connected to the secondary branch pipeline 102 due to the occurrence of a fire, and the pressure of the fire protection water in the secondary branch pipeline 102 becomes lower than the pressure of the fire protection water in the primary main pipeline 101, as shown in Fig. 1b, the clapper 140 rapidly rises vertically along the guide pin 130 while compressing the elastic member 160, that is, the back surface of the clapper 140 simultaneously separates from the inner peripheral opening edge of the seat ring 110, so the primary main pipeline 101 is opened.

[0037] Thereby, the fire protection water in the primary main pipeline 101 can be supplied to the secondary branch pipeline 102 as quickly as possible, so the initial suppression of the fire against time can be carried out very efficiently.

[0038] In the present invention, it is preferable that the back surface of the clapper 140 in contact with the seat ring 110 is formed in a conical shape. Then, during operation, the resistance of the fire protection water supplied from the primary main pipeline 101 to the secondary branch pipeline 102 hitting the back surface of the clapper 140 is significantly reduced to induce a rapid flow, so that the rapid supply of the fire protection water becomes possible.

[0039] And it is preferable to fit a sealing ring 111 made of rubber material on the inner peripheral opening edge where the back surface of the clapper 140 contacts the seat ring 110.

[0040] That is, as shown in Fig. 4a, it can be formed in a type where a sealing ring 111 made of a rubber material with a round and curved surface is fitted on the inclined surface of the inner peripheral opening edge of the sheet ring 110, or as shown in Fig. 4b, it can be formed in a type where a sealing ring 111 made of a rubber material with a round and curved surface is fitted on the stepped inner peripheral surface of the inner peripheral opening edge of the sheet ring 110.

[0041] Then, since the back surface of the clapper 140 comes into line contact with the sealing ring 111, the sealing force is improved, and it is preferable because the replacement work of only the sealing ring 111 can be facilitated as needed.

[0042] Figs. 3a and 3b are cross-sectional views showing clappers with different structures.

[0043] As shown in Fig. 3a, the clapper 140 is configured in a hollow conical shape with the upper and lower parts facing each other, and the conical back surface is in line contact with the sealing ring 111 of the sheet ring 110.

[0044] Such a clapper 140 can be brought into direct contact with the sealing ring 111 of the sheet ring 110 as shown in Fig. 1a. However, when the clapper 140 is manufactured in a conical shape, if it is not precisely machined, the contact surface contacting the sealing ring 111 of the sheet ring 110 becomes non-uniform, so there is a risk of gaps occurring when contacting the sealing ring 111 of the sheet ring 110.

[0045] Therefore, as shown in Fig. 3b, it is preferable to have a structure in which a clapper ring 143 precision-machined from a metal material is externally fitted to the peripheral edge of the clapper 140 in line contact with the sealing ring 111 and tightened and fixed with a cap 144 having a female thread.

[0046] Then, fastening and releasing the cap 144 facilitates the attachment and detachment of the clapper ring 143, making the replacement work easier. Also, since such a clapper ring 143 can be easily precision machined, when it comes into contact with the sealing ring 111 of the sheet ring 110, the adhesion force is good and there is no risk of gap generation, and it can make good line contact with the sealing ring 111, so the sealing force increases.

[0047] And when fitting the clapper ring 143 onto the peripheral edge of the clapper 140, it is preferable to interpose a plurality of O-rings between the peripheral edge of the clapper 140 and the clapper ring 143. Then, the gaps generated on the contact surface between the peripheral edge of the clapper 140 and the clapper ring 143 will be well sealed by the plurality of O-rings.

[0048] Also, as shown in FIGS. 3a and 3b, the clapper 140 is formed in a hollow shape with an empty interior by joining a conical upper body 140a and a lower body 140b facing each other, and it is preferable to form a plurality of through holes 142 for allowing fire fighting water to flow into the hollow interior in the upper body 140a.

[0049] Then, in addition to the weight reduction of the clapper 140 itself, the fire fighting water in the secondary side branch pipeline 102 flows into and fills the hollow portion 140c through the through holes 142, so that the clapper 140 can operate very sensitively and quickly when a fire occurs.

[0050] FIG. 5a is a plan view showing the structure of the support ring 120, and FIG. 5b is a cross-sectional view taken along line A-A of FIG. 5a.

[0051] The support ring 120 screwed onto the inner peripheral surface of the secondary side branch pipeline 102 is preferably formed such that the support stem 121 having a pin hole into which one end of the guide pin 130 is fitted has a V-shaped cross-section with a narrower width at the lower surface than at the upper surface, as shown in FIG. 5b.

[0052] Then, when the clapper 140 is opened and the fire fighting water in the primary main pipeline 101 heads towards the secondary branch pipeline 102, the pressure resistance of the fire fighting water hitting the support stem 121 can be reduced to the maximum, enabling smooth supply of the fire fighting water.

[0053] And the paddle switch 200 is arranged such that the tip 211 of the paddle 210 inserted through the side wall of the primary main pipeline 101 for setting adjustment of the paddle 210 is placed on the back side of the clapper 140, and the tip 211 of the paddle 210 is provided with a setting adjustment pin 220 that contacts the back of the clapper 140 and is adjusted in height by screwing or in a multi-stage manner as shown in FIGS. 1a, 1b, and 2.

[0054] As described above, if the height of the setting adjustment pin 220 that contacts the back of the clapper 140 can be adjusted, the setting adjustment of the fire alarm signal switch can be performed very easily, so that the signal at the time of a fire can be sent as quickly as possible and rapid fire suppression becomes possible.

[0055] The invention made by the present inventor has been specifically described based on the above embodiments. However, it goes without saying for those with ordinary knowledge in this technical field that the present invention is not limited to the above embodiments and can be variously modified without departing from the gist thereof.

Explanation of Reference Numerals

[0056] 100: Valve housing 101: Primary main pipeline 102: Secondary branch pipeline 103: Clapper operation space 110: Seat ring 120: Support ring 130: Guide pin 140: Clapper 141: Guide hole 142: Through hole 160: Elastic member 200: Paddle switch 210: Paddle 211: Tip 220: Setting adjustment pin

Claims

1. When the supply of fire fighting water is started due to a fire, an alarm valve is configured in which a paddle switch 200 is attached to one side so as to automatically notify the control panel of this, a valve housing 100 in which a clapper operating space 103 of a predetermined size is formed between a primary main pipeline 101 and a secondary branch pipeline 102; a seat ring 110 provided on the inner peripheral surface of the primary main pipeline 101 as an outlet for fire fighting water; a support ring 120 provided on the inner peripheral surface of the secondary branch pipeline 102 and having a pin hole formed at the center of a support stem 121; a guide pin 130 having one end fitted and fixed to the pin hole of the support ring 120 and the other end vertically provided toward the seat ring 110; a clapper 140 that vertically moves up and down along the guide pin 130 slidably inserted into a guide hole 141 formed at the center of the upper surface, and opens and closes the primary main pipeline 101 by contacting and non - contacting the seat ring 110; an elastic member 160 that is compressed when the clapper 140 rises and applies tension when the clapper 140 descends, and is attached to the guide pin 130 to maintain the sealing force of the clapper 140; and An alarm valve characterized in that it has a cylindrical structure so that there is no risk of water leakage due to the uniformity of the sealing pressure of the clapper 140 that operates vertically.

2. The alarm valve according to claim 1, wherein the clapper 140 has a conical back surface that contacts the seat ring 110 so as to reduce the resistance when the fire fighting water in the primary main pipeline 101 flows toward the secondary branch pipeline 102.

3. A sealing ring 111 made of a rubber material with a round - curved surface is fitted to the inclined surface of the inner peripheral opening edge that contacts the clapper 140 on the seat ring 110, so that when the clapper 140 descends, the back surface of the clapper 140 is in direct line contact with the sealing ring 111 to increase the sealing force, The alarm valve according to claim 1, characterized in that.

4. A clapper ring 143 made of a metal material is fitted to the peripheral edge of the clapper 140 that is in line contact with the sealing ring 111, so that when the clapper 140 descends, the sealing force is increased by the line contact between the sealing ring 111 and the clapper ring 143, The alarm valve according to claim 3, characterized in that.

5. The clapper 140 is formed in a hollow conical shape with its upper and lower surfaces facing each other, and a plurality of through holes 142 for allowing secondary-side fire fighting water to flow into the hollow interior are formed on the upper surface, so that the clapper 140 operates sensitively. The alarm valve according to claim 1, characterized in that.

6. The support stem 121 of the support ring 120 is formed to have a V-shaped cross section with a narrower width at the lower surface than at the upper surface in order to reduce the resistance when the fire fighting water in the primary-side main pipeline 101 passes through. The alarm valve according to claim 1, characterized in that.

7. The paddle switch 200 is arranged such that the tip 211 of the paddle 210 inserted through the side wall of the primary-side main pipeline 101 is placed on the back side of the clapper 140. A setting adjustment pin 220 that contacts the back surface of the clapper 140 is provided at the tip 211 of the paddle 210 so as to be height-adjustable, facilitating the setting adjustment of the fire alarm signal switch. The alarm valve according to claim 1, characterized in that.

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