Two-position three-way valve and fire extinguishing equipment thereof

Abstract

The utility model relates to a selector valve, and discloses a two-position three-way valve and fire extinguishing equipment thereof. A starting cavity is formed among the valve body, the valve element and the driver. The valve body is provided with an inlet, a first outlet and a second outlet, the valve element is provided with a channel communicated with the starting cavity and the second outlet, the lower end of the valve element is provided with a plug to connect and disconnect the second outlet, a first sealing piece is arranged between the valve element and the plug, and the valve element is sleeved with a conversion sleeve. When the driver blocks the port of the valve core channel, the inlet is separated from the second outlet, and the inlet is communicated with the first outlet through the conversion cavity; the driver is separated from the port, high-pressure fluid pushes the valve element to move upwards, the inlet is communicated with the second outlet, the first sealing piece seals the conversion sleeve, and the inlet is separated from the first outlet. The valve can change positions under high pressure, is used for fire fighting, is matched with a fire fighting bottle group, and can realize two-cluster partition protection. The first partition protection only needs to open a bottle group valve, and the second partition protection needs to cooperate with the bottle group valve and the valve.

Description

Technical Field

[0001] This utility model relates to selector valves, and more particularly to two-position three-way valves and their fire extinguishing equipment. Background Technology

[0002] In recent years, with the development of industrial automation and fluid control technology, two-position three-way valves have been widely used in many fields. They are mainly used to control the flow direction of fluids and achieve switching between different pipelines. In existing technologies, such as the fire extinguishing system described in patent number CN202410108698.2, although complex piping systems and valve control are involved, the specific structure and working principle of a two-position three-way valve with similar functions are not explicitly mentioned. This patent mainly focuses on the overall layout and emergency start function of the fire extinguishing system, using components such as electrically controlled selector valves and fire detection tubes to achieve the delivery and control of extinguishing agents. However, further optimization is still needed in terms of the flexibility and accuracy of fluid control.

[0003] Existing two-position three-way valves typically employ simple electromagnetic drives or mechanical structures for on / off control, but these methods have several drawbacks. For example, some existing two-position three-way valves may experience sealing issues during switching, leading to fluid leakage and affecting system stability and reliability. Furthermore, the complex structural designs of some valves result in high manufacturing costs and difficult maintenance. Additionally, existing two-position three-way valves often struggle to achieve rapid and stable switching when dealing with high-pressure fluids, limiting their application in high-precision, high-requirement scenarios. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a two-position three-way valve and its fire extinguishing device.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0006] A two-position three-way valve includes a valve body, a valve core, and an actuator mounted thereon. An actuation chamber is formed between the valve body, valve core, and actuator. The valve body has an inlet, a first outlet, and a second outlet. The valve core has a valve core channel for connecting the actuation chamber to the second outlet. A plug for switching the second outlet is installed at the lower end of the valve core.

[0007] A first sealing element is installed between the valve core and the plug, and a conversion sleeve is fitted on the valve core. A conversion chamber communicating with the first outlet is provided between the conversion sleeve and the valve core.

[0008] When the actuator blocks the port of the valve core channel, the inlet and the second outlet are separated by the plug, the conversion sleeve is separated from the first seal, and the inlet is connected to the first outlet through the conversion chamber;

[0009] When the actuator is separated from the port of the valve core channel, the high-pressure fluid at the inlet pushes the valve core upward, the inlet connects with the second outlet, the first seal moves upward and seals on the conversion sleeve, and the inlet is separated from the first outlet.

[0010] Preferably, the valve core includes an upper core body and a lower core body, the outer diameter of the upper core body is larger than the outer diameter of the lower core body, and the conversion sleeve is fitted onto the lower core body and sealed to the valve body.

[0011] Preferably, a fourth sealing element is fitted onto the lower core body to seal against the inner wall of the conversion sleeve, and the fourth sealing element is located above the conversion cavity.

[0012] Preferably, the conversion sleeve is provided with a first through hole for connecting the conversion chamber and the first outlet, and the upper and lower ends of the conversion sleeve are provided with a second sealing element and a third sealing element for sealing with the valve body, and the first through hole is located between the second sealing element and the third sealing element.

[0013] Preferably, the opening of the conversion cavity faces the first seal, and the bottom of the conversion sleeve is provided with a downwardly protruding, tapered sealing part. When the conversion sleeve seals with the first seal, the end face of the sealing part seals on the first seal.

[0014] Preferably, the valve body is provided with a valve body channel, and the valve core is provided with a second through hole that communicates with the starting chamber. The inlet communicates with the starting chamber after passing through the valve body channel and the second through hole.

[0015] Preferably, the upper end of the plug is threaded to the valve core, and a clamping element is installed at the lower end of the plug. A fifth sealing element is installed between the clamping element and the plug. When the plug blocks the port of the second outlet, the fifth sealing element seals the port of the second outlet.

[0016] Preferably, the plug includes a small head and a large head, the outer diameter of the large head is larger than the outer diameter of the small head, the small head is located above the large head and is threadedly connected to the valve core, the first sealing element is fitted on the small head, and when the plug is tightened on the valve core, the valve core presses the first sealing element on the large head to form an end face seal.

[0017] Preferably, a sixth sealing element is fitted on the small head to seal against the inner wall of the valve core, and the small head is sealed to the valve core through the sixth sealing element.

[0018] Fire extinguishing equipment, including two-position three-way valves.

[0019] This utility model, by adopting the above technical solution, has significant technical effects:

[0020] This two-position three-way valve can achieve stable switching operation under high pressure conditions. When the actuator blocks the valve core passage port, the inlet and the second outlet are isolated, and the high-pressure fluid at the inlet can push open the switching sleeve, connecting the inlet and the first outlet. When the actuator separates from the valve core passage port, the high-pressure fluid pushes the valve core upward, connecting the inlet and the second outlet. At the same time, the switching chamber of the switching sleeve seals with the first seal, isolating the inlet and the first outlet. This switching mechanism operates reliably under high pressure, ensuring accurate switching of the fluid path.

[0021] In the field of fire protection, when used in conjunction with fire cylinder assemblies, precise protection of specific areas can be achieved. For example, it can achieve two-zone protection: when zone one needs protection, only the cylinder assembly valve is opened, while when zone two needs protection, both the cylinder assembly valve and the two-position three-way valve are opened. This zone protection method improves the utilization efficiency of fire protection resources, avoids unnecessary waste of extinguishing agents, and allows for precise control of fire situations in different areas, enhancing the targeting and effectiveness of the fire protection system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a two-position three-way valve when the inlet and the first outlet are connected.

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure of the valve core and its components.

[0024] Figure 3 This is a schematic diagram of the structure of a two-position three-way valve when the inlet and the second outlet are connected.

[0025] The names of the body parts referred to by the numbers in the above attached diagrams are as follows:

[0026] 10—Valve body, 101—Inlet, 102—First outlet, 103—Second outlet, 104—Valve body passage

[0027] 11—Valve core, 111—Valve core channel, 112—Upper core body, 113—Lower core body, 114—Second through hole

[0028] 12-Driver

[0029] 13—Plug, 131—Small head, 132—Large head

[0030] 14—First Seal

[0031] 15—Transformer sleeve, 151—Transformer cavity, 152—First through hole, 153—Sealing part

[0032] 16—Fourth seal

[0033] 17—Second Seal

[0034] 18—Third seal

[0035] 19—Clamping parts

[0036] 20—Fifth Seal

[0037] 21—Sixth Seal

[0038] 100—Starting Chamber Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described in detail with reference to the embodiments.

[0040] Example 1

[0041] A two-position three-way valve includes a valve body 10, a valve core 11 mounted thereon, and an actuator 12. The actuator 12 is threadedly fastened to the valve body 10. An elastic reset element, which is a spring, is installed between the actuator 12 and the valve core 11. In this embodiment, the actuator 12 is an electromagnetic actuator, but in other embodiments, it can be a motor. An actuation chamber 100 is formed between the valve body 10, the valve core 11, and the actuator 12. The valve body 10 has an inlet 101, a first outlet 102, and a second outlet 103. The valve core 11 has a valve core channel 111 for connecting the actuation chamber 100 and the second outlet 103. A plug 13 for switching the second outlet 103 is installed at the lower end of the valve core 11. The plug 13 is fastened to the valve core 11. When the plug 13 blocks the port of the second outlet 103, the inlet 101 is disconnected from the second outlet 103; when the plug 13 is not blocking the port of the second outlet 103, the inlet 101 is connected to the second outlet 103.

[0042] A first sealing element 14 is installed between the valve core 11 and the plug 13. The first sealing element 14 is an annular sealing gasket. A conversion sleeve 15 is fitted on the valve core 11. The lower end of the conversion sleeve 15 is axially limited on the valve body 10. A conversion cavity 151 communicating with the first outlet 102 is provided between the conversion sleeve 15 and the valve core 11. The opening of the conversion cavity 151 faces downward.

[0043] When the actuator 12 blocks the port of the valve core channel 111, that is, when the actuator 12 is pressed against the valve core 11, the plug 13 blocks the upper port of the second outlet 103, the inlet 101 and the second outlet 103 are separated by the plug 13, the conversion sleeve 15 is separated from the first seal 14, and the inlet 101 is connected to the first outlet 102 through the conversion chamber 151.

[0044] When the actuator 12 is separated from the port of the valve core channel 111, the high-pressure fluid at the inlet 101 pushes the valve core 11 upward, the plug 13 moves synchronously with the valve core 11, the inlet 101 is connected to the second outlet 103, the first seal 14 moves upward and seals on the conversion sleeve 15, the first seal 14 seals the port of the conversion chamber 151, and the inlet 101 is separated from the first outlet 102.

[0045] This two-position three-way valve can be switched under high pressure. In fire protection applications, this structure, when paired with fire cylinder groups, can achieve two-zone protection. If zone one requires protection, the cylinder group valve is opened; if zone two requires protection, both the cylinder group valve and this valve are opened.

[0046] Working principle: When this two-position three-way valve is working, the state of the actuator 12 determines the position of the valve core 11 and the connectivity of each channel. When the actuator 12 blocks the valve core channel 111 port and presses against the valve core 11, the valve core 11 moves downward, and the plug 13 blocks the upper port of the second outlet 103, isolating the inlet 101 from the second outlet 103 through the plug 13. At the same time, the downward movement of the valve core 11 causes the first seal 14 to separate from the conversion sleeve 15, allowing the fluid in the inlet 101 to connect with the first outlet 102 through the conversion chamber 151.

[0047] When the actuator 12 separates from the port of the valve core channel 111, the pressure in the starting chamber 100 is released to the second outlet 103 through the valve core channel 111. The high-pressure fluid at the inlet 101 pushes the valve core 11 upward, and the plug 13 moves synchronously with the valve core 11, connecting the inlet 101 and the second outlet 103. At the same time, the first seal 14 moves upward with the valve core 11 and seals on the conversion sleeve 15, sealing the port of the conversion chamber 151, thereby isolating the inlet 101 from the first outlet 102.

[0048] The valve core 11 includes an upper core body 112 and a lower core body 113. The valve core 11 is an integral valve core. The upper core body 112 is located on the lower core body 113. The outer diameter of the upper core body 112 is larger than the outer diameter of the lower core body 113. The conversion sleeve 15 is fitted on the lower core body 113 and is sealed to the valve body 10.

[0049] The lower core 113 is fitted with a fourth sealing element 16 that seals the inner wall of the conversion sleeve 15. The fourth sealing element 16 is an O-ring. The fourth sealing element 16 is located above the conversion chamber 151. The fourth sealing element 16 is used to prevent high-pressure fluid in the valve body channel 104 from flowing into the conversion chamber 151 through the gap between the conversion sleeve 15 and the valve core 11.

[0050] The conversion sleeve 15 is provided with a first through hole 152 for connecting the conversion chamber 151 and the first outlet 102. Both the upper and lower ends of the conversion sleeve 15 are provided with a second sealing element 17 and a third sealing element 18 that seal with the valve body 10. Both the first sealing element 17 and the second sealing element 18 are O-rings. The first through hole 152 is located between the second sealing element 17 and the third sealing element 18. The first through hole 152 on the conversion sleeve 15 connects the conversion chamber 151 and the first outlet 102, ensuring that under specific valve operating conditions, fluid can flow from the inlet 101 through the conversion chamber 151 and the first through hole 152 to the first outlet 102 according to the designed path, achieving precise control of the fluid flow direction and improving the accuracy and reliability of valve operation. When the inlet 101 is connected to the second outlet 103, the second sealing element 17 and the third sealing element 18 prevent fluid from flowing into the first outlet 102, avoiding accidental activation of other zones.

[0051] The opening of the switching chamber 151 faces the first seal 14. The bottom of the switching sleeve 15 has a downwardly protruding, conical sealing part 153. When the switching sleeve 15 seals with the first seal 14, the starter 12 is in the open state. The sealing gasket on the starter 12 separates from the valve core 11. High-pressure fluid pushes open the valve core 11, and the valve core 11 drives the plug 13 to move upward. The end face of the sealing part 153 on the plug 13 seals on the first seal 14, thereby cutting off the inlet 101 from the first outlet 102. The conical sealing part 153 design increases the sealing area and the tightness of the seal. Compared with ordinary flat seals, it can better adapt to pressure changes inside the valve and effectively prevent fluid leakage. Even under high-pressure environments, it can ensure the sealing performance between the inlet 101 and the first outlet 102, improve the sealing reliability of the valve, and thus enhance the safety and stability of the entire system.

[0052] The valve body 10 is provided with a valve body channel 104, and the valve core 11 is provided with a second through hole 114 communicating with the starting chamber 100. The inlet 101 communicates with the starting chamber 100 through the valve body channel 104 and the second through hole 114. When the starter 12 is activated, the high-pressure fluid at the inlet 101 can push open the valve core 11 through the valve body channel 104, and the valve core 11 moves up and down to switch the high-pressure fluid line. This design simplifies the valve operation method. Only the starter 12 needs to be controlled to achieve precise action of the valve core 11 using high-pressure fluid, which improves the convenience and accuracy of valve operation and meets the needs of fluid line switching in different working scenarios.

[0053] The upper end of the plug 13 is threaded to the valve core 11, and the lower end of the plug 13 is fitted with a clamping member 19. The clamping member 19 is T-shaped and is threaded to the plug 13. A fifth sealing member 20 is installed between the clamping member 19 and the plug 13. The fifth sealing member 20 is an O-ring. When the plug 13 blocks the port of the second outlet 103, the fifth sealing member 20 seals the port of the second outlet 103.

[0054] The plug 13 includes a small head 131 and a large head 132. The outer diameter of the large head 132 is larger than that of the small head 131. The small head 131 is located above the large head 132 and is threadedly connected to the valve core 11. The first sealing element 14 is fitted onto the small head 131. When the plug 13 is tightened onto the valve core 11, the valve core 11 presses the first sealing element 14 against the large head 132 to form an end face seal. The threaded connection between the small head 131 and the valve core 11 makes the installation and removal of the plug 13 convenient. During installation, the plug 13 can be easily connected to the valve core 11 by rotating it. Furthermore, the tightness of the first sealing element 14 can be adjusted by tightening or loosening the plug 13 according to actual needs to achieve the best sealing effect, improving operational convenience and flexibility.

[0055] The small head 131 is fitted with a sixth sealing element 21 that seals against the inner wall of the valve core 11. The sixth sealing element 21 is an O-ring seal, and the small head 131 is sealed to the valve core 11 through the sixth sealing element 21. The sixth sealing element 21 further improves the sealing between the plug 13 and the valve core 11 to prevent leakage from the valve core channel 111 at the connection between the plug 13 and the valve core 11.

[0056] Example 2

[0057] Fire extinguishing equipment, including the two-position three-way valve in Example 1.

Claims

1. A two-position three-way valve comprising a valve body (10) and a valve core (11) and a driver (12) mounted on the valve body (10), the valve body (10), the valve core (11) and the driver (12) forming an actuating cavity (100) therebetween, the valve body (10) being provided with an inlet (101), a first outlet (102) and a second outlet (103), the valve core (11) being provided with a valve core channel (111) for connecting the actuating cavity (100) with the second outlet (103), the lower end of the valve core (11) being mounted with a plug (13) for opening and closing the second outlet (103), characterized in that: a first sealing member (14) is mounted between the valve core (11) and the plug (13), a conversion sleeve (15) is sleeved on the valve core (11), and the conversion sleeve (15) is provided with a conversion cavity (151) communicating with the first outlet (102) between the conversion sleeve (15) and the valve core (11); when the driver (12) blocks the port of the valve core channel (111), the inlet (101) is disconnected from the second outlet (103) through the plug (13), the conversion sleeve (15) is separated from the first sealing member (14), and the inlet (101) is communicated with the first outlet (102) through the conversion cavity (151); when the driver (12) is separated from the port of the valve core channel (111), the high-pressure fluid at the inlet (101) pushes the valve core (11) to move upward, the inlet (101) is communicated with the second outlet (103), the first sealing member (14) moves upward and is sealed on the conversion sleeve (15), and the inlet (101) is disconnected from the first outlet (102). The valve core (11) comprises an upper core body (112) and a lower core body (113), the outer diameter of the upper core body (112) is larger than that of the lower core body (113), and the conversion sleeve (15) is sleeved on the lower core body (113) and is sealingly connected with the valve body (10).

2. The two-position, three-way valve of claim 1, wherein: The lower core body (113) is sleeved with a fourth sealing member (16) sealing the inner wall of the conversion sleeve (15), and the fourth sealing member (16) is arranged above the conversion cavity (151).

3. The two-position, three-way valve of claim 2, wherein: The conversion sleeve (15) is provided with a first through hole (152) for connecting the conversion cavity (151) with the first outlet (102), and the conversion sleeve (15) is provided with a second sealing member (17) and a third sealing member (18) sealing with the valve body (10) at the upper and lower ends thereof, and the first through hole (152) is arranged between the second sealing member (17) and the third sealing member (18).

4. The two position, three way valve of claim 1, wherein: The opening of the conversion cavity (151) faces the first sealing member (14), the bottom of the conversion sleeve (15) is provided with a sealing portion (153) protruding downward and tapering, and when the conversion sleeve (15) is sealed with the first sealing member (14), the end face of the sealing portion (153) is sealed on the first sealing member (14).

5. The two-position three-way valve according to claim 1 or 4, characterized in that: The valve body (10) is provided with a valve body channel (104), and the valve core (11) is provided with a second through hole (114) communicating with the actuating cavity (100), and the inlet (101) is communicated with the actuating cavity (100) through the valve body channel (104) and the second through hole (114).

6. The two position, three way valve of claim 1, wherein: ​ 7. The two position, three way valve of claim 1, wherein: The upper end of the plug (13) is threadedly connected with the valve core (11), the lower end of the plug (13) is provided with a pressing part (19), the fifth sealing part (20) is arranged between the pressing part (19) and the plug (13), and the fifth sealing part (20) is sealed with the port of the second outlet (103) when the plug (13) blocks the port of the second outlet (103).

8. The two position, three way valve of claim 1, wherein: The plug (13) comprises a small head part (131) and a large head part (132), the outer diameter of the large head part (132) is larger than that of the small head part (131), the small head part (131) is arranged above the large head part (132) and is threadedly connected with the valve core (11), the first sealing part (14) is sleeved on the small head part (131), and the valve core (11) presses the first sealing part (14) on the large head part (132) to form an end face seal when the plug (13) is screwed on the valve core (11).

9. The two position, three way valve of claim 1, wherein: The sixth sealing part (21) is sleeved on the small head part (131) and is sealed with the inner wall of the valve core (11), and the small head part (131) is sealed with the valve core (11) through the sixth sealing part (21).

10. Fire extinguishing apparatus characterised in that: The two-position three-way valve comprises the two-position three-way valve according to any one of claims 1-9.

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