Precise control type fire-fighting wet alarm valve

Abstract

The utility model relates to the related field of wet-type alarm valves, in particular to an accurate control type fire-fighting wet-type alarm valve which comprises a wet-type alarm valve body, a valve seat, a valve clack, a sealing ring, a positioning column, a positioning groove, a reset spring, a push rod, a transmission plate, a sliding rod, an adjusting plate, an adjusting spring, a screw rod, a transparent plate, scale marks and the like. The adjusting plate and the adjusting spring are arranged on the wet-type alarm valve body, the initial elastic force of the spring is adjusted through horizontal movement of the adjusting plate, the reactive force applied to the valve clack by the adjusting spring can better adapt to the actual use condition of the wet-type alarm valve, and it is guaranteed that the valve clack cannot affect the response speed of a system, and the service life of the system is prolonged. And the spring with moderate elasticity is beneficial to more accurate resetting of the valve clack, and is beneficial to improving the flexibility of the wet alarm valve in the using process.

Description

Technical Field

[0001] The utility model relates to the relevant field of wet alarm valves, in particular to a precision-controlled fire-fighting wet alarm valve. Background Art

[0002] A wet alarm valve is a one-way valve that only allows water to flow into the sprinkler system in one direction and alarms at a specified flow rate. Normally, the water pressure before and after the wet alarm valve is equal (water passes through the water pressure balancing hole in the guide pipe to maintain the water pressure balance before and after the valve disc). Due to the difference in the deadweight of the valve disc and the total pressure of the water before and after the valve disc, the valve disc is in a closed state (the total pressure above the valve disc is greater than the total pressure below the valve core). When a fire occurs, the closed sprinkler sprays water. Since the water pressure balancing hole has no time to replenish water, the water pressure above the alarm valve drops. At this time, the water pressure before the valve disc is greater than the water pressure behind the valve disc, so the valve disc opens to supply water to the riser and pipe network. At the same time, water enters the delay device, pressure switch, hydraulic alarm and other facilities along the annular groove of the alarm valve, sending out a fire alarm signal and starting the fire pump

[0003] The existing published patent number is: CN219242714U, which discloses an automatically reset wet alarm valve. When the pressure difference in the valve chamber disappears, the valve disc will quickly and automatically reset under the reaction force of the reset spring. In this way, the valve disc has a precise positioning structure and will not be misplaced when closed, which facilitates its automatic and precise reset.

[0004] The tension of the spring of the existing patent is relatively fixed, so that the reaction force applied by the spring to the valve disc is also relatively fixed. It is difficult to adjust the initial elastic force of the spring according to the actual use of the wet alarm valve, and the elastic force of the reset spring directly affects the resetting effect of the valve disc. If the spring is too loose or too tight, it may cause inaccurate resetting of the valve disc. The fixed spring can easily reduce the accuracy of the valve disc, thereby reducing the flexibility of the wet alarm valve during use. Summary of the invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a precision-controlled fire wet alarm valve to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a precision control type fire wet alarm valve, comprising a wet alarm valve body, a valve seat arranged in the wet alarm valve body, a valve disc rotatably mounted at the right end of the inner side of the wet alarm valve body and dividing the inner cavity of the wet alarm valve body into two upper and lower chambers, the valve disc is attached to the top of the valve seat, the top of the valve disc is connected to the inner wall of the wet alarm valve body through a reset spring, and a push rod is installed at the right end of the top of the valve disc;

[0007] A positioning column is horizontally installed at the free end of the valve disc, and an arc-shaped positioning groove corresponding to the rotation trajectory of the positioning column is opened on the inner wall of the wet alarm valve body;

[0008] The right end of the push rod is provided with a transmission plate fitted therewith, and a sliding rod is fixedly provided at one end of the transmission plate away from the push rod, the sliding rod movably penetrates the outer surface of the wet alarm valve body, and a collar is sleeved on the sliding rod, and the collar is movably connected to the inner side of a fixed cylinder installed on the side surface of the wet alarm valve body;

[0009] An adjusting plate is slidably installed in the fixed cylinder, the adjusting plate is connected to the collar through an adjusting spring, and a screw is rotatably installed at one end of the adjusting plate away from the adjusting spring;

[0010] The screw rod is threadedly connected to the fixing cylinder, and the screw rod is connected to the hand wheel after passing through the inner side of the fixing cylinder.

[0011] Preferably, the outer top of the push rod is a spherical structure, and the outer diameter of the push rod is smaller than the width of the transmission plate.

[0012] Preferably, a sealing ring is adhered to the bottom end surface of the valve flap, and the sealing ring movably extends into the inner side of the valve seat when the valve flap is in a closed state.

[0013] Preferably, the sealing ring is made of silicone.

[0014] Preferably, a transparent plate is fixedly embedded in the front end surface of the fixed tube, and the rear end surface of the transparent plate is connected to the front end of the inner side of the fixed tube.

[0015] Preferably, the front end surface of the fixing cylinder is provided with a plurality of scale lines, and the scale lines are aligned with the bottom of the transparent plate.

[0016] Preferably, the screw is perpendicular to the right end surface of the adjustment plate.

[0017] Beneficial effects of the utility model:

[0018] The utility model arranges an adjusting plate and an adjusting spring on the wet alarm valve body, and adjusts the initial elastic force of the spring by horizontally moving the adjusting plate. The reaction force exerted by the adjusting spring on the valve disc can better adapt to the actual use of the wet alarm valve, ensuring that the valve disc will not affect the response speed of the system while ensuring the accuracy of valve disc resetting and the sealing of the system. A spring with moderate elastic force is conducive to more accurate valve disc resetting and to improving the flexibility of the wet alarm valve during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front cross-sectional structure of the wet alarm valve of the utility model;

[0020] Figure 2 It is a schematic diagram of the push rod connection structure of the utility model;

[0021] Figure 3 It is a front view structural schematic diagram of the fixing cylinder of the utility model.

[0022] Among them: wet alarm valve body -1, valve seat -2, valve disc -3, sealing ring -4, positioning column -5, positioning groove -6, reset spring -7, push rod -8, transmission plate -9, sliding rod -10, collar -11, fixed cylinder -12, adjustment plate -13, adjustment spring -14, screw -15, hand wheel -16, transparent plate -17, scale line -18. DETAILED DESCRIPTION

[0023] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0024] like Figure 1 As shown, the utility model provides a precision-controlled fire-fighting wet alarm valve, comprising a wet alarm valve body 1, a valve seat 2 arranged in the wet alarm valve body 1, and a valve flap 3 rotatably mounted on the right end of the inner side of the wet alarm valve body 1 and dividing the inner cavity of the wet alarm valve body 1 into two upper and lower chambers, the valve flap 3 is attached to the top of the valve seat 2, and the valve flap 3 is used to control the opening and closing of the inside of the wet alarm valve body 1;

[0025] In this embodiment, a sealing ring 4 is attached to the bottom end surface of the valve disc 3. When the valve disc 3 is in a closed state, the sealing ring 4 movably extends into the inner side of the valve seat 2, which is beneficial to improve the sealing performance of the valve disc 3 connected to the valve seat 2;

[0026] In this embodiment, the sealing ring 4 is made of silicone material, which has good elasticity and good sealing performance;

[0027] Specifically, when in use, the wet alarm valve body 1 is connected to the fire protection pipe system. When no fire occurs, the upper and lower water pressures of the valve flap 3 are balanced, and the upper pressure-bearing surface of the valve flap 3 is larger than the lower pressure-bearing surface. The valve flap 3 will not open to cause a false alarm. When a fire occurs, water flows in the fire protection pipe system, and a water pressure difference appears in the chambers on both sides of the valve flap 3. The valve flap 3 in the wet alarm valve rotates upward and automatically opens under the action of the water pressure difference, and at the same time, a large amount of water is supplied to the water supply lateral system network to ensure continuous water spraying for fire extinguishing. When the valve flap opens, water will flow through the alarm pipe on the wet alarm valve body 1. After passing through the delay device, the water will trigger the pressure switch and drive the hydraulic alarm. The pressure switch sends an electrical signal to the fire control room to alarm, and at the same time, the fire water pump is started to ensure that there is sufficient water pressure and water supply for fire extinguishing.

[0028] like Figures 1 to 3 As shown, in this embodiment, the top of the valve disc 3 is connected to the inner wall of the wet alarm valve body 1 through a reset spring 7, so that the valve disc 3 can be quickly rotated downward and reset under the action of the reset spring 7, and a push rod 8 is vertically fixedly installed at the right end of the top of the valve disc 3;

[0029] A positioning column 5 is horizontally installed at the left end of the outer side of the valve disc 3, and an arc-shaped positioning groove 6 corresponding to the rotation trajectory of the positioning column 5 is opened on the inner wall of the wet alarm valve body 1, so that the valve disc 3 can drive the positioning column 5 to slide in the positioning groove 6 when rotating. The positioning column 5 cooperates with the positioning groove 6 to provide positioning for the valve disc 3, thereby improving the accuracy of the valve disc 3 when rotating and resetting;

[0030] The right end of the push rod 8 is provided with a transmission plate 9 fitted therewith, and the right end of the transmission plate 9 is vertically installed with a sliding rod 10, which movably penetrates the inner right end surface and the right end surface of the wet alarm valve body 1, and a collar 11 is fixedly sleeved on the sliding rod 10, and the collar 11 is movably connected to the inner side of a fixed cylinder 12 locked and fixed to the right end surface of the wet alarm valve body 1, and the collar 11 can move horizontally along the inner wall of the fixed cylinder 12, which is used to provide auxiliary positioning for the sliding rod 10, thereby improving the stability of the sliding rod 10 during the horizontal movement process;

[0031] An adjusting plate 13 is slidably installed in the fixed cylinder 12, and the adjusting plate 13 is connected to the collar 11 through an adjusting spring 14, so that the adjusting spring 14 can apply elastic force to the collar 11 and the sliding rod 10, so that the sliding rod 10 and the transmission plate 9 cooperate with the push rod 8 to apply a reaction force to the valve disc 3, so that the valve disc 3 can be quickly reset. The end of the adjusting plate 13 away from the adjusting spring 14 is rotatably installed with a screw 15;

[0032] The screw rod 15 is threadedly connected to the fixed cylinder 12, and the screw rod 15 passes through the inner side of the fixed cylinder 12 and is connected to the hand wheel 16, so that the screw rod 15 can be rotated by the hand wheel 16;

[0033] In this embodiment, the outer top of the push rod 8 is a spherical structure, and the outer diameter of the push rod 8 is smaller than the width of the transmission plate 9, so that the valve disc 3 drives the push rod 8 to apply a stable thrust to the transmission plate 9 when rotating;

[0034] In this embodiment, a transparent plate 17 is fixedly embedded in the front end surface of the fixed cylinder 12, and the rear end surface of the transparent plate 17 is connected to the front end of the inner side of the fixed cylinder 12, so that the position of the adjustment plate 13 can be observed through the transparent plate 17, thereby calculating the initial elastic force applied by the adjustment spring 14 to the valve disc 3;

[0035] In this embodiment, a plurality of scale lines 18 are provided on the front end surface of the fixed cylinder 12, and the scale lines 18 are aligned with the bottom of the transparent plate 17, so that the initial elastic force exerted by the adjustment spring 14 on the valve flap 3 can be more accurately calculated by the scale lines 18 in cooperation with the adjustment plate 13;

[0036] The screw 15 is perpendicular to the right end surface of the adjustment plate 13, so that the screw 15 can stably drive the adjustment plate 13 to move horizontally.

[0037] Specifically, the valve disc 3 applies a thrust to the reset spring 14 when it rotates upward to open, and the valve disc 3 drives the push rod 8 to rotate synchronously when it rotates, and the push rod 8 drives the transmission plate 9 to move rightward, and the transmission plate 9 drives the sliding rod 10 and the collar 11 to move rightward, and the adjusting spring 14 is compressed by the thrust of the collar 11. When the water pressure difference in the wet alarm valve body 1 disappears, the valve disc 3 is quickly reset by the reaction force of the adjusting spring 14 and the reset spring 7, so that the wet alarm valve is closed. When the valve disc 3 rotates, the positioning column 5 cooperates with the positioning groove 6 to provide positioning for the valve disc 3, thereby improving the accuracy of the valve disc 3 during rotation;

[0038] And the initial elastic force of the adjusting spring 14 can be adjusted according to the actual use of the wet alarm valve, and the screw 15 can be driven to rotate by turning the hand wheel 16, and the screw 15 drives the adjusting plate 13 to move horizontally, so that the pressure applied by the adjusting plate 13 to the adjusting spring 14 is adjusted, and the initial elastic force of the adjusting spring 14 is adjusted, and the position of the adjusting plate 13 can be observed through the transparent plate 17, and the position of the adjusting plate 17 can be judged by the scale line 18 to more accurately calculate the initial elastic force of the adjusting spring 14, so as to adjust the reaction force applied by the adjusting spring 14 to the valve disc 3 according to the actual use of the wet alarm valve, so as to ensure that it will not affect the response speed of the system, and can ensure the accuracy of the valve disc 3 resetting and the sealing of the system.

[0039] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precision control type fire wet alarm valve, comprising a wet alarm valve body, a valve seat arranged in the wet alarm valve body, a valve disc rotatably mounted on the right end of the inner side of the wet alarm valve body and dividing the inner cavity of the wet alarm valve body into two upper and lower chambers, and the valve disc is attached to the top of the valve seat; It is characterized in that The top of the valve disc is connected to the inner wall of the wet alarm valve body through a return spring, and a push rod is installed at the right end of the top of the valve disc; A positioning column is horizontally installed at the free end of the valve disc, and an arc-shaped positioning groove corresponding to the rotation trajectory of the positioning column is opened on the inner wall of the wet alarm valve body; The right end of the push rod is provided with a transmission plate fitted therewith, and a sliding rod is fixedly provided at one end of the transmission plate away from the push rod, the sliding rod movably penetrates the outer surface of the wet alarm valve body, and a collar is sleeved on the sliding rod, and the collar is movably connected to the inner side of a fixed cylinder installed on the side surface of the wet alarm valve body; An adjusting plate is slidably installed in the fixed cylinder, the adjusting plate is connected to the collar through an adjusting spring, and a screw is rotatably installed at one end of the adjusting plate away from the adjusting spring; The screw rod is threadedly connected to the fixing cylinder, and the screw rod is connected to the hand wheel after passing through the inner side of the fixing cylinder.

2. According to claim 1, a precision control type fire wet alarm valve is characterized by: The outer top of the push rod is a spherical structure, and the outer diameter of the push rod is smaller than the width of the transmission plate.

3. According to claim 1, a precision control type fire wet alarm valve is characterized in that: A sealing ring is pasted on the bottom end surface of the valve disc, and the sealing ring moves and extends into the inner side of the valve seat when the valve disc is in a closed state.

4. According to claim 3, a precision control type fire wet alarm valve is characterized in that: The sealing ring is made of silicone.

5. According to claim 1, a precision control type fire wet alarm valve is characterized by: A transparent plate is fixedly embedded in the front end surface of the fixed tube, and the rear end surface of the transparent plate is connected to the front end of the inner side of the fixed tube.

6. According to claim 5, a precision control type fire wet alarm valve is characterized in that: The front end surface of the fixing cylinder is provided with a plurality of scale lines, and the scale lines are aligned with the bottom of the transparent plate.

7. According to claim 1, a precision control type fire wet alarm valve is characterized by: The screw rod is perpendicular to the right end surface of the adjusting plate.

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