Special gas starting delay valve for ship gas fire extinguishing device

Abstract

The invention discloses a special gas starting time-delay valve for a ship gas fire extinguishing device, which comprises a valve body, the valve body comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are connected through threads, a gas inlet is arranged above one side of the upper valve body, a through hole communicated with the gas inlet is arranged on the other side of the upper valve body, a gas outlet is arranged below the upper valve body, and the gas inlet is communicated with the gas outlet. The air outlet and the air inlet are arranged on the same side, and an adjusting device used for adjusting the flow of the air source is arranged in the through hole. A conveying channel is formed in the upper valve body and communicated with the air inlet and the through hole, a spring assembly is arranged in the conveying channel, one end of the spring assembly extends into the lower valve body, the lower end of the lower valve body is connected with an adjusting screw, and the adjusting screw is used for adjusting the yield torque of the spring assembly. By adjusting the valve rod, the flow of a starting gas source can be adjusted, the 30-s delayed opening function of the valve set is achieved by adjusting the yield torque of the adjusting spring, and the fire extinguishing agent release design requirement of a gas fire extinguishing device is met.

Description

Technical Field

[0001] The invention relates to the technical field of time-delay valves, and in particular to a special gas-activated time-delay valve for ship gas fire-fighting extinguishing devices. Background Art

[0002] The delay valve is an important component of the ship's gas fire extinguishing system. It is mainly used to delay the release of fire extinguishing agent after the gas fire extinguishing system is activated, giving the operator time to evacuate the fire scene. At the same time, if the fire alarm is misjudged within the 30s delay period, the activation of the fire extinguishing system will be immediately shut down to avoid accidental release of fire extinguishing agent.

[0003] The 30s delay function is a regulation for the operator to evacuate the fire scene after the ship's gas fire extinguishing device implements the extinguishing agent release action. At present, the delay function adopted by domestic gas fire extinguishing devices is realized by using gas tank diaphragm type and electric delay. The diaphragm type delay device has a large error in the detonation time, a large volume, and a weak device stability function. The electric delay device cannot be used when the power is off, which is inconsistent with the requirements of the SOLAS Convention.

[0004] The above-mentioned problems have not been solved. It is necessary to provide a device on the ship's gas fire-fighting fire-fighting device that has a gas delay of 30 seconds when the fire-extinguishing agent release is activated, and a delay device that can immediately shut down the fire-extinguishing agent release in the event of a false fire alarm. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention proposes a special gas-activated delay valve for a ship gas fire-fighting extinguishing device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a gas-activated delay valve specially used for ship gas fire-fighting extinguishing device, comprising a valve body, the valve body comprising an upper valve body and a lower valve body, the upper valve body and the lower valve body being connected by a thread, an air inlet is provided above one side of the upper valve body, a through hole communicating with the air inlet is provided on the other side, an air outlet is provided below the upper valve body, and the air outlet and the air inlet are arranged on the same side, and an adjusting device for adjusting the flow rate of the gas source is arranged in the through hole; a conveying channel is provided in the upper valve body, the conveying channel is communicated with the air inlet and the through hole, a spring assembly is arranged in the conveying channel, one end of the spring assembly extends into the lower valve body, and an adjusting screw is connected to the lower end of the lower valve body, and the adjusting screw is used to adjust the yield moment of the spring assembly.

[0007] Preferably, the adjusting device includes a tightening nut, an adjusting valve stem and a throttling screw, wherein the adjusting valve stem is located in the through hole, the left side of the adjusting valve stem is connected to the upper valve body through the tightening nut, and the throttling screw is located on the right side of the adjusting valve stem and is connected to the upper valve body through a thread.

[0008] Preferably, the spring member includes a piston and an adjusting spring, the upper end of the adjusting spring is fixedly connected to the piston, and the lower end of the adjusting spring extends into the lower valve body.

[0009] Preferably, a stop flow channel hole communicating with the delivery channel is vertically opened on one side of the upper valve body, and a position limiting spring member is provided in the stop flow channel hole, and the limit member cooperates with the stop flow channel hole to form a sealing gap.

[0010] Preferably, the limiting member includes a stop piston, an O-ring and a plug, one side of the stop piston is connected to the delivery channel, and the other side is sleeved with an O-ring, and the plug is used to seal the stop channel hole.

[0011] Preferably, the stop piston is installed with an O-ring and forms a sealing gap with the stop flow channel hole in the upper valve body. The tail end of the stop piston is equipped with an anti-reset spring to prevent the small stop piston from vibrating or shaking and causing displacement to affect the seal. When the stop piston is static, the anti-reset spring is pressed to limit the displacement of the stop piston during vibration or shaking. When the stop piston is working, the air pressure of the air inlet acts on the piston. When the piston moves downward to the stop design distance position under the action of pressure, the stop piston moves in a parallel direction due to pressure, and the piston moves in a vertical direction due to pressure. The piston pressure action surface is large, and when it moves downward, it produces a tangential linear movement with the small stop piston. When the design movement distance value is reached, the piston and the small stop piston complete the stop cooperation under the action of pressure. Then, the air inlet and the air outlet are connected.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) By adjusting the valve stem to achieve adjustable starting gas source flow and adjustable spring yield force distance, the valve group can be opened with a delay of 30 seconds, meeting the design requirements for the release of fire extinguishing agents in gas fire extinguishing devices; (2) Through the bidirectional adjustment design of adjusting the valve stem and adjusting the spring, the delay time can be adjusted and controlled, ensuring reliable delay performance and stable delay time value (30s); (3) The design adopts a gas-start delay method to ensure that the safe release of the fire extinguishing agent of the fire extinguishing device is not affected after the power is lost; it meets the various force majeure factors of the fire extinguishing agent release of the ship's gas fire extinguishing device and complies with the requirements of the SOLAS Convention.

[0013] (4) The time-delay valve device has the advantages of small size, accurate time-delay opening time, easy installation, simple maintenance and reusability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded view of the present invention.

[0015] Figure 2 It is a cross-sectional view of the present invention.

[0016] Figure 3 It is a stereogram of the present invention.

[0017] Figure numerals: 1-upper valve body, 2-piston, 3-adjusting spring, 4-lower valve body, 5-through hole, 6-tightening nut, 7-adjusting valve stem, 8-delivery channel, 9-throttling screw, 10 stop piston, 11-stop flow channel hole, 12-O-ring, 13 plug, 14-adjusting screw, 15-anti-reset spring, 16-inlet, 17-outlet DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0019] The invention is described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-3 As shown, the present invention proposes a special gas-activated time-delay valve for ship gas fire extinguishing device, comprising a valve body, the valve body comprising an upper valve body 1 and a lower valve body 4, the upper valve body 1 and the lower valve body 4 are connected by threads, an air inlet is provided on the upper side of one side of the upper valve body 1, a through hole 5 communicating with the air inlet is provided on the other side, an air outlet is provided on the lower side of the upper valve body 1, and the air outlet and the air inlet are arranged on the same side, and an adjusting device for adjusting the air source flow is arranged in the through hole 5; A delivery channel 8 is provided in the upper valve body 1, and the delivery channel 8 is communicated with the air inlet and the through hole 5. A spring assembly is arranged in the delivery channel 8, and one end of the spring assembly extends into the lower valve body 4. An adjusting screw 14 is connected to the lower end of the lower valve body 4, and is used to adjust the yield moment of the spring 3 assembly.

[0021] As a preferred embodiment of the present invention, it may also have the following additional technical features: In this embodiment, the regulating device includes a tightening nut 6, an adjusting valve stem 7 and a throttling screw 9. In the initial state, the throttling screw 9 is in a relatively loose state, and the airflow enters the valve body through the threaded seam of the throttling screw 9. The sealing method of the regulating valve stem 7 and the valve body is a conical surface seal. When the thread in the regulating valve stem 7 is turned, its left and right movement forms a change in the distance from the conical surface of the valve body and the cross-section. The flow rate of the air source will change with the size of the opening cross-section. When the airflow needs to be increased, the throttling screw 9 is also loosened. When throttling or stopping is required, the throttling screw 9 is tightened. Through the cooperation of the adjusting valve stem 7 and the throttling screw 9, the airflow and flow rate can be accurately controlled. The regulating valve stem 7 is located in the through hole 5, and the left side of the regulating valve stem 7 is connected to the upper valve body 1 through the tightening nut 6. The throttling screw 9 is located on the right side of the regulating valve stem 7 and is connected to the upper valve body 1 through a thread. The regulating valve stem 7 is installed in the upper valve body 1 by the tightening nut 6, and the intake pressure flow is regulated by adjusting the size of the intake port cross-section; a throttling screw is installed at the front end to make the flow regulation of the regulating valve stem more accurate; after the 30s delay test is completed in conjunction with the adjusting spring, the regulating valve stem is fixed by the set screw to maintain the balance of the intake port flow and ensure the stability of the 30s delay.

[0022] In this embodiment, the spring component includes a piston 2 and an adjusting spring 3, and the upper end of the adjusting spring 3 is fixedly connected to the piston 2. It should be noted that the piston 2 is located in the upper valve body 1 but is not fixedly connected and can be pushed, and the lower end extends into the lower valve body 4.

[0023] In this embodiment, a stop channel hole 11 communicating with the delivery channel 8 is vertically opened on one side of the upper valve body 1. A position limiting spring member is provided in the stop channel hole 11. The limit member cooperates with the stop channel hole 11 to form a sealing gap.

[0024] In this embodiment, the limiter includes a stop piston 10, an O-ring 12 and a plug 13. One side of the stop piston 10 is connected to the delivery channel 8, and the other side is sleeved with an O-ring 12. The plug 13 is used to seal the stop channel hole 11. The stop piston 10 is first installed, and then the O-ring 12 is sleeved on the stop piston 10, and finally the plug is installed for sealing.

[0025] In this embodiment, the stop piston 10 is installed with the O-ring and cooperates with the stop flow channel hole 11 in the upper valve body 1 to form a sealing gap. The tail end of the stop piston 10 is equipped with an anti-reset spring 15 to prevent the stop piston 2 from vibrating or shaking and causing displacement to affect the seal; when the delay valve is working, the stop piston 10 is reset by unscrewing the plug 13, and the delay valve resumes its working condition. After the O-ring 12 is installed, the spring is inserted, and finally the plug is installed for sealing. In actual applications, not only springs but also rubber and other commonly used elastic structures with elastic functions can be used to prevent the stop piston 2 from shifting.

[0026] Working principle: the upper valve body 1 is connected to the lower valve body 4; the regulating valve stem 7 is connected to the upper valve body 1 by a tightening nut 6, and a throttling screw 9 is arranged inside to realize the regulation of the gas source flow rate and prevent the pressure from rising sharply. In an emergency, the air inlet source of the valve chamber is closed to prevent the delay valve from working; the piston 2 and the air outlet of the upper valve body 1 form a sealing structure, and a sealing ring can be added between them to enhance the sealing; the small stop piston 2 is installed in the upper valve body 1, and the air inlet and the air outlet are connected through an O-ring in static state. When the piston 2 moves to the designed distance, the stop piston 102 is pushed inwardly toward the conveying channel 8 under the action of the intake pressure to complete the stopping effect; the adjusting spring 3 is connected to the lower valve body 4, and the force of the spring 3 is adjusted by the screw to realize the length of time of the delayed yield movement. When the delay valve air inlet receives the starting gas source of the gas fire extinguishing device, the starting gas source passes through the throttling screw 9, and after the flow is adjusted by the regulating valve stem 7, it enters the middle hole of the upper valve body 1. After that, the piston 2 and the regulating spring 3 yield and move downward under the action of pressure. When the piston 2 moves to a certain distance, the stopper small piston 2 is pushed inward under the action of the intake pressure to form a stop fit, and the air inlet and the air outlet form a passage. The starting gas source smoothly realizes the opening of the fire extinguishing agent bottle group of the gas fire extinguishing device. The yield movement time of the delay valve is called delay. The delay time is achieved by adjusting the strength of the regulating spring 3 and the cross-section of the air source air inlet to reduce or increase the air source flow rate to achieve the length of the delayed opening time.

[0027] Those skilled in the art can flexibly select and design according to needs, and are not limited thereto.

[0028] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0029] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the patent and protection scope of the present invention shall be subject to the attached claims.

Claims

1. A gas-activated time-delay valve for ship gas fire extinguishing device, comprising a valve body, characterized in that: The valve body comprises an upper valve body (1) and a lower valve body (4), wherein the upper valve body (1) and the lower valve body (4) are connected by threads, an air inlet is provided on the upper side of one side of the upper valve body (1), and a through hole (5) communicating with the air inlet is provided on the other side of the upper valve body (1), an air outlet is provided on the lower side of the upper valve body (1), and the air outlet and the air inlet are arranged on the same side, and an adjusting device for adjusting the flow rate of the air source is arranged in the through hole (5); a conveying channel (8) is provided in the upper valve body (1), and the conveying channel (8) is communicated with both the air inlet and the through hole (5), and a spring assembly is arranged in the conveying channel (8), one end of the spring assembly extends into the lower valve body (4), and an adjusting screw is connected to the lower end of the lower valve body (4), and the adjusting screw (14) is used to adjust the yield torque of the spring (3) assembly.

2. A gas-activated time-delay valve for ship gas fire extinguishing device as claimed in claim 1, characterized in that: The regulating device comprises a tightening nut (6), a regulating valve stem (7) and a throttling screw (9); the regulating valve stem (7) is located in the through hole (5); the left side of the regulating valve stem (7) is connected to the upper valve body (1) via the tightening nut (6); the throttling screw (9) is located on the right side of the regulating valve stem (7) and is connected to the upper valve body (1) via a thread.

3. A gas-activated time-delay valve for ship gas fire extinguishing device as claimed in claim 1, characterized in that: The spring component comprises a piston (2) and an adjusting spring (3); the upper end of the adjusting spring (3) is fixedly connected to the piston (2), and the lower end extends into the lower valve body (4).

4. A gas-activated time-delay valve for ship gas fire extinguishing device as claimed in claim 2, characterized in that: A stop flow channel hole (11) communicating with the delivery channel (8) is vertically opened on one side of the upper valve body (1), and a position limiting spring member is provided in the stop flow channel hole (11), and the limiting member cooperates with the stop flow channel hole (11) to form a sealing gap.

5. A gas-activated time-delay valve for ship gas fire extinguishing device as claimed in claim 4, characterized in that: The stopper comprises a stop piston (10), an O-shaped sealing ring (12) and a plug (13); one side of the stop piston (10) (2) is connected to the delivery channel (8), and the other side is sleeved with an O-shaped sealing ring (12); the plug (13) is used to seal the stop channel hole (11).

6. A gas-activated time-delay valve for ship gas fire extinguishing device as claimed in claim 5, characterized in that: The stop piston (10) is installed with the O-ring and cooperates with the stop flow channel hole (11) in the upper valve body (1) to form a sealing gap. The tail end of the stop piston (10) is equipped with an anti-reset spring (15) for preventing the small stop piston (2) from vibrating or shaking and causing displacement to affect the seal.

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