Novel low-leakage high-reliability bottle valve

Abstract

The novel low-leakage high-reliability bottle head valve comprises a valve body, a valve deck and a protective cap, the valve body is a T-shaped valve, the valve deck is in sealed connection with an inlet end valve port of the valve body in a spiral mode, the protective cap is in sealed connection with an outlet end valve port of the valve body in a spiral mode, a piston assembly is arranged in the valve body, and a valve core is arranged in the valve deck. One end of the piston assembly is an open port, the other end of the piston assembly is a sealed port, the open port faces the valve core, and the piston assembly is used for sealing or opening the outlet end valve port. According to the low-leakage and high-reliability bottle head valve, the functions of inflation, sealing, opening, pressure display, overpressure release and automatic valve closing of the bottle head valve can be achieved, compared with the prior art, the low-leakage and high-reliability bottle head valve is suitable for the bottle head valve with high requirements for micro leakage and reliability in a special environment, the working state is timely and efficient, the performance is stable and reliable, the structure is reasonable and compact, and assembling is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing, and in particular to a novel low-leakage and high-reliability bottle head valve. Background Art

[0002] As a key component of the gas fire extinguishing system, the bottle head valve is assembled with the gas cylinder to store and seal the gas fire extinguishing medium. Because the fire extinguishing agent needs to be stored under pressure, there is a risk of leakage regardless of the sealing structure of the bottle head valve used. Once a fire occurs, the fire extinguishing agent may be insufficient due to micro-leakage, resulting in reduced fire extinguishing efficiency or fire extinguishing failure, which has a huge impact on the safety of life and economic losses. Especially for special environments where personnel stay in relatively closed spaces for a long time, such as underwater submersibles, micro-leakage of fire extinguishing agent will cause varying degrees of harm to the crew's body. Reducing the micro-leakage rate of gas fire extinguishing devices can improve the reliability of products. Provide safe and reliable protection for the use of gas fire extinguishing systems in special environments. .

[0003] In order to solve the above-mentioned problems, it is necessary to provide a bottle head valve which can be applied to special environments and has the characteristics of low micro leakage rate and high reliability. Summary of the invention

[0004] In order to solve the above-mentioned deficiencies in the prior art, the present invention proposes a novel low-leakage and high-reliability bottle head valve.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a new type of low-leakage and high-reliability bottle head valve, including a valve body, a valve cover and a protective cap, the valve body is a "T" type valve, the valve cover is sealed and connected to the inlet valve port of the valve body by a spiral method, the protective cap is sealed and connected to the outlet valve port of the valve body by a spiral method, a piston assembly is arranged in the valve body, a valve core is arranged in the valve cover, one end of the piston assembly is an open port, the other end is a sealed port, and the open port faces the valve core, and the piston assembly is used to seal or open the outlet valve port.

[0006] Preferably, the piston assembly includes a piston body, an O-ring, a seal, and a sealing ring. An annular conical groove is opened in the middle of the piston body, and the conical groove is used to indicate the position of the piston body. The piston body is respectively provided with an O-ring and two sealing rings. The O-ring is located above the conical groove, and the two sealing rings are located below the conical groove. The seal is used to seal one end of the piston body.

[0007] Preferably, a needle valve hole is also provided on the valve body, and the safety relief hole is connected to a needle valve assembly. The needle valve assembly includes a needle part, an inflation head and a sealing ring. The needle part is located in the needle valve hole. The needle part has a cavity inside that communicates with the valve body. The inflation head is used to simultaneously seal the needle valve hole and one end of the needle part, and the sealing ring is sleeved on the needle part.

[0008] Preferably, a safety relief hole is opened on the valve body, and the safety relief hole is connected to a safety relief component, which includes a safety plug, a safety pressure ring, a safety diaphragm and a safety gasket. The safety plug is used to seal the safety relief hole, and has a hollow cavity inside and is communicated with the valve body. The safety gasket, safety diaphragm and safety pressure ring are sequentially mounted on the safety plug.

[0009] Preferably, an observation port for observing the position of the piston member is provided on the valve body, and a plugging member is connected to the observation port, and the plugging member is used to seal the observation port. When the piston assembly is reset, the observation port is consistent with the conical groove of the piston member.

[0010] Preferably, the protective cap is penetrated and connected with a fixing device, which includes a fixing piece, an iron chain and a fixing plug. The fixing plug penetrates the protective cap and is fixedly connected to the protective cap. The fixing piece penetrates the valve body and is fixedly connected to the valve body and is located below the same side of the protective cap. One end of the iron chain is fixedly connected to the fixing plug, and the other end is fixedly connected to the fixing piece.

[0011] This type of gas bottle head valve adopts the differential pressure sealing and opening principle. After the fire extinguishing agent is filled in the liquid storage bottle, the pressure balance between the upper and lower chambers can be automatically adjusted to achieve the sealing of the bottle head valve. The bottle head valve is opened by destroying the pressure balance to spray the fire extinguishing agent. Compared with the previous pressure relief type that uses a gate knife to pierce the working diaphragm, this design adopts a special valve core pressure relief type. The advantage of this type is that it can be reused repeatedly without replacing the diaphragm, which is easy to maintain. The automatic valve closing function can be realized through structural design, reducing the operation links, and the sealing is safe and reliable. The valve body and the needle valve assembly, the safety pressure relief assembly and the plug are threaded. The formed interface can correspond to the pressure display, safety pressure relief and piston position observation functions on the gas bottle head valve. The selection design can meet different technical requirements.

[0012] Compared with the prior art, the present invention has the following beneficial effects: a low-leakage and high-reliability bottle head valve can realize the functions of inflation, sealing, opening, pressure display, overpressure relief and automatic valve closing of the bottle head valve. Compared with the prior art, the present invention is suitable for bottle head valves with high requirements for micro-leakage and reliability in special environments. The working state is timely and efficient, the performance is stable and reliable, the structure is reasonable and compact, and the assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of the present invention

[0014] Figure 2 The exploded structure diagram of the present invention

[0015] Figure 3 Schematic diagram of the needle valve assembly structure in the present invention

[0016] Figure 4 Schematic diagram of the piston assembly structure of the present invention

[0017] Figure 5 It is a schematic diagram of the structure of the safety discharge assembly of the present invention.

[0018] Markings in the figure: 2-valve cover, 3-valve core, 4-valve body, 411-safety relief hole 412-needle valve hole, 5-protection cap, 6-needle valve assembly, 61-needle part, 62-inflating head, 63-sealing ring, 7-blocking part, 8-piston assembly, 81-O-ring, 82-piston body, 83-sealing ring, 84-sealing part, 85-conical groove, 9-safety relief assembly, 91-safety screw plug, 92-safety pressure ring, 93-safety diaphragm, 94-safety gasket, 10-fixing plug, 11-iron chain, 12 fixing part. DETAILED DESCRIPTION

[0019] 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.

[0020] The invention is described in detail below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1-5 As shown, a novel low-leakage and high-reliability bottle head valve proposed by the present invention includes a valve body 4, a valve cover 2 and a protective cap 5. The valve body 4 is a "T"-type valve. The valve cover 2 is sealed and connected to the inlet valve port of the valve body 4 by a spiral method. The protective cap 5 is sealed and connected to the outlet valve port of the valve body 4 by a spiral method. A piston assembly 8 is arranged in the valve body 4, and a valve core 3 is arranged in the valve cover 2. One end of the piston assembly 8 is an open port, and the other end is a sealed port, and the open port faces the valve core 3. The piston assembly 8 is used to seal or open the outlet valve port.

[0022] The valve cover 2 can be connected to an electric starter, a pneumatic starter and a manual starter through threads according to functional requirements to realize various starting modes of the bottle head valve, such as electric, pneumatic, and manual. The electric starter and the pneumatic manual starter are threaded on the upper end of the valve cover 2. The starter is a common means in this field, so the figure shows that when the valve core 3 is working, the thrust of the electric starter and the pneumatic manual starter threaded on the upper end of the valve cover 2 is used to squeeze the valve core 3 so that the upper cavity of the valve body 4 is depressurized, the piston assembly 8 moves upward, and the fire extinguishing agent flows out from the outlet end of the valve body 4. The bottle head valve is in an open state at this time. If the bottle head valve needs to be used again, the valve core 3 and the piston assembly 8 need to be reset. When the bottle head valve is in a closed state, the pressure of the upper cavity of the valve body 4 and the lower cavity of the valve body 4 is balanced, the piston assembly 8 closes the outlet end of the valve body 4, and the fire extinguishing agent is sealed in the gas cylinder. The bottle head valve can be repeatedly pressurized and opened through the valve core 3, which is convenient for maintenance.

[0023] like Figure 4 As shown, in this embodiment, the piston assembly 8 includes a piston body 82, an O-ring 8163, a seal 84, and a sealing ring 83. An annular conical groove 85 is provided in the middle of the piston body 82. The conical groove 85 is used to indicate the position of the piston body 82. The piston body 82 is respectively sleeved with an O-ring 8163 and two sealing rings 83. The O-ring 8163 is located above the conical groove 85, and the two sealing rings 83 are located below the conical groove 85. The seal 84 is used to seal one end of the piston body 82. The seal 84 can be a composition of a sealing sheet and a clamping screw shown in this structure, or can be a press-type sealing head, or can be a sealing structure in the art. In this invention, the seal 84 is not further limited;

[0024] The contact part between the piston assembly 8 and the valve body 4 is provided with a double seal to realize the double seal technology of the valve and realize the low leakage and high reliability of the bottle head valve. That is, the sealing ring 83 is provided at the sealing stop of the valve body 4 to realize the end face sealing, and the material is nylon. A second sealing ring 83 is provided between the pressure ring and the piston body 82. The sealing ring 83 is in sealing contact with the inner wall of the lower cavity of the valve body 4 and is fixed by a sealing member 84.

[0025] like Figure 3As shown, in this embodiment, a needle valve hole 412 is further provided on the valve body 4, and the safety relief hole 411 is connected to the needle valve assembly 6. The needle valve assembly 6 includes a needle part 61, an inflation head 62 and a sealing ring 63. The needle part 61 is located in the needle valve hole 412, and the needle part 61 has a cavity in it that communicates with the valve body 4. The inflation head 62 is used to simultaneously seal the needle valve hole 412 and one end of the needle part 61. The sealing ring 63 is sleeved on the needle part 61, and the sealing ring 63 is used to strengthen the sealing with the needle valve hole 412. The structure is not limited to this structure, and a pressure gauge can be added to the structure to realize the pressure display function. For technicians in this field, the position of the pressure gauge can be determined according to the actual environmental conditions. The present invention does not further limit the position of the pressure gauge. When the needle valve assembly is opened, the inflation head 62 is first screwed outward, and then the external air source can enter the lower cavity of the valve body 4 through the cavity in the needle part 61 to achieve the inflation function.

[0026] like Figure 5 As shown, in this embodiment, a safety relief hole 411 is opened on the valve body 4, and the safety relief hole 411 is connected to a safety relief component, which includes a safety plug 91, a safety pressure ring 92, a safety diaphragm 93 and a safety gasket 94. The safety plug 91 is used to seal the safety relief hole 411, and the inside is a hollow cavity and communicates with the valve body 4. The safety gasket 94, the safety diaphragm 93 and the safety pressure ring 92 are sequentially sleeved on the safety plug 91. When the bottle head valve is connected to the gas cylinder, when the pressure in the gas cylinder exceeds the upper limit value as the temperature increases, the safety diaphragm 93 in the safety relief component 9 will rupture automatically, the safety plug 91 will fall off, and the fire extinguishing agent will be released from the safety relief component 9 to avoid the hazard of high-pressure explosion of the equipment.

[0027] In this embodiment, an observation port for observing the position of the piston member is opened on the valve body 4, and the observation port is connected to a plugging member 7, which is used to seal the observation port. When the piston assembly 8 is reset, the observation port is consistent with the tapered groove 85 of the piston member. The 90° tapered groove 85 processed in the middle of the piston body 82 can be observed through the piston position observation port to determine whether the piston assembly 8 is in working or closed reset state. The piston position observation port is usually closed by plugging.

[0028] like Figure 1 As shown, in this embodiment, the protective cap 5 is penetrated and connected with a fixing device, the fixing device includes a fixing piece 12, an iron chain 11 and a fixing plug 10, the fixing plug 10 penetrates the protective cap 5 and is fixedly connected to the protective cap 5, the fixing piece 12 penetrates the valve body and is fixedly connected to the valve body and is located below the same side of the protective cap 5, one end of the iron chain 11 is fixedly connected to the fixing plug 10, and the other end is fixedly connected to the fixing piece 12, the fixing device is only for further fixing the protective cap 5 to prevent it from falling off, the fixing device may not be installed, or other fixing structures that can prevent the protective cap 5 from falling off may be used.

[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 new type of low leakage and high reliability bottle head valve, characterized by: The invention comprises a valve body (4), a valve cover (2) and a protective cap (5); the valve body (4) is a "T"-type valve; the valve cover (2) is sealedly connected to the inlet valve port of the valve body (4) by means of a screw; the protective cap (5) is sealedly connected to the outlet valve port of the valve body (4) by means of a screw; a piston assembly (8) is arranged in the valve body (4); a valve core (3) is arranged in the valve cover (2); one end of the piston assembly (8) is an open port and the other end is a sealed port, and the open port faces the valve core (3); the piston assembly (8) is used to seal or open the outlet valve port.

2. A new type of low leakage and high reliability bottle head valve as claimed in claim 1, characterized in that: The piston assembly (8) comprises a piston body (82), an O-ring (81) (63), a sealing member (84) and a sealing ring (83). An annular conical groove (85) is provided in the middle of the piston body (82). The conical groove (85) is used to indicate the position of the piston body (82). An O-ring (81) (63) and two sealing rings (83) are respectively sleeved on the piston body (82). The O-ring (81) (63) is located above the conical groove (85), and the two sealing rings (83) are located below the conical groove (85). The sealing member (84) is used to seal one end of the piston body (82).

3. A new type of low leakage and high reliability bottle head valve as claimed in claim 1, characterized in that: The valve body (4) is also provided with a needle valve hole (412), the needle valve hole (412) is connected to a needle valve assembly (6), the needle valve assembly (6) comprises a needle part (61), an air charging head (62) and a sealing ring (63), the needle part (61) is located in the needle valve hole (412), the needle part (61) has a cavity in it and is in communication with the valve body (4), the air charging head (62) is used to simultaneously seal the needle valve hole (412) and one end of the needle part (61), and the sealing ring (63) is sleeved on the needle part (61).

4. A new type of low leakage and high reliability bottle head valve as claimed in claim 3, characterized in that: The valve body (4) is provided with a safety relief hole (411), and the safety relief hole (411) is connected to a safety relief component, and the safety relief component comprises a safety screw plug (91), a safety pressure ring (92), a safety diaphragm (93) and a safety gasket (94). The safety screw plug (91) is used to seal the safety relief hole (411), and has a hollow cavity therein and is in communication with the valve body (4). The safety gasket (94), the safety diaphragm (93) and the safety pressure ring (92) are sequentially sleeved on the safety screw plug (91).

5. A new type of low leakage and high reliability bottle head valve as claimed in claim 2, characterized in that: The valve body (4) is provided with an observation port for observing the position of the piston member, the observation port is connected to a plugging member (7), and the plugging member (7) is used to seal the observation port. When the piston assembly (8) is reset, the observation port is consistent with the conical groove (85) of the piston member.

6. A new type of low leakage and high reliability bottle head valve as claimed in claim 1, characterized in that: The protective cap (5) is penetrated and connected with a fixing device, and the fixing device comprises a fixing piece (12), an iron chain (11) and a fixing plug (10); the fixing plug (10) penetrates the protective cap (5) and is fixedly connected to the protective cap (5); the fixing piece (12) penetrates the valve body and is fixedly connected to the valve body and is located below the same side of the protective cap (5); one end of the iron chain (11) is fixedly connected to the fixing plug (10), and the other end is fixedly connected to the fixing piece (12).

Images