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

Abstract

The invention 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] The present invention relates to a selection valve, and particularly to a two-way three-way valve and its fire extinguishing equipment. Background Art

[0002] In recent years, with the development of industrial automation and fluid control technology, two-way three-way valves have been widely used in many fields. It is mainly used to control the flow direction of fluids and achieve switching between different pipelines. In the existing technology, for example, in the fire extinguishing system with the patent number CN202410108698.2, although it involves a complex pipeline system and valve control, the specific structure and working principle of the two-way three-way valve with similar functions are not clearly mentioned. This patent mainly focuses on the overall layout and emergency start-up function of the fire extinguishing system, and realizes the delivery and control of fire extinguishing agents through components such as electric control selection valves and fire detection tubes. However, there is still room for further optimization in terms of the flexibility and accuracy of fluid control.

[0003] Existing two-way three-way valves usually use simple electromagnetic drive or mechanical structures to achieve on-off control, but there are some deficiencies. For example, some two-way three-way valves in the existing technology may have problems with poor sealing during the switching process, resulting in fluid leakage and affecting the stability and reliability of the system. In addition, the structural design of some valves is relatively complex, resulting in high manufacturing costs and difficult maintenance. At the same time, existing two-way three-way valves often have difficulty achieving fast and stable switching when facing high-pressure fluids, limiting their use in some high-precision and high-requirement application scenarios. Summary of the Invention

[0004] The present invention aims at the deficiencies in the existing technology and provides a two-way three-way valve and its fire extinguishing equipment.

[0005] To solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A two-way three-way valve, comprising a valve body, a valve core and a driver installed thereon. An activation chamber is formed among the valve body, the valve core and the driver. The valve body is provided with an inlet, a first outlet and a second outlet. The valve core is provided with a valve core channel for connecting the activation chamber and the second outlet. A plug for opening and closing the second outlet is installed at the lower end of the valve core.

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

[0008] When the driver blocks the port of the valve core channel, the inlet and the second outlet are blocked by the plug, the conversion sleeve is separated from the first sealing member, and the inlet communicates with the first outlet through the conversion chamber.

[0009] When the driver is separated from the port of the valve core channel, the high-pressure fluid at the inlet pushes the valve core upward, the inlet communicates with the second outlet, the first seal moves upward and seals on the conversion sleeve, and the inlet is cut off 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 that of the lower core body. The conversion sleeve is sleeved on the lower core body and is hermetically connected to the valve body.

[0011] Preferably, a fourth seal that seals with the inner wall of the conversion sleeve is sleeved on the lower core body, and the fourth seal is arranged above the conversion cavity.

[0012] Preferably, a first through hole for communicating the conversion cavity with the first outlet is provided on the conversion sleeve. Second seals and third seals that seal with the valve body are provided at both the upper and lower ends of the conversion sleeve, and the first through hole is arranged between the second seal and the third seal.

[0013] Preferably, the opening of the conversion cavity faces the first seal. A sealing portion that protrudes downward and has a conical shape is provided at the bottom of the conversion sleeve. When the conversion sleeve seals with the first seal, the end face of the sealing portion seals on the first seal.

[0014] Preferably, a valve body channel is provided on the valve body, a second through hole communicating with the starting cavity is provided on the valve core, and the inlet communicates with the starting cavity through the valve body channel and the second through hole.

[0015] Preferably, the upper end of the plug is threadedly connected to the valve core. A pressing member is installed at the lower end of the plug, and a fifth seal is installed between the pressing member and the plug. When the plug blocks the port of the second outlet, the fifth seal seals with the port of the second outlet.

[0016] Preferably, the plug includes a small head portion and a large head portion. The outer diameter of the large head portion is larger than that of the small head portion. The small head portion is arranged above the large head portion and is threadedly connected to the valve core. The first seal is sleeved on the small head portion. When the plug is screwed tightly on the valve core, the valve core presses the first seal on the large head portion to form an end face seal.

[0017] Preferably, a sixth seal that seals with the inner wall of the valve core is sleeved on the small head portion, and the small head portion seals with the valve core through the sixth seal.

[0018] A fire extinguishing device, including a two-position three-way valve.

[0019] Due to the adoption of the above technical solutions, the present invention has remarkable technical effects:

[0020] This two-position three-way valve can achieve stable position switching under high-pressure conditions. When the actuator blocks the valve core channel port, the inlet is cut off from the second outlet, and the high-pressure fluid at the inlet can push open the conversion sleeve, connecting the inlet to the first outlet; when the actuator separates from the valve core channel port, the high-pressure fluid pushes the valve core upward, connecting the inlet to the second outlet. At the same time, the conversion cavity of the conversion sleeve is sealed with the first seal, cutting off the inlet from the first outlet. This position-switching mechanism operates reliably in a high-pressure environment, ensuring accurate switching of the fluid passage.

[0021] In the field of fire protection, when used in combination with a fire bottle group, it can achieve precise protection of specific areas. For example, it can achieve two-cluster partition protection. When partition one needs to be protected, only the bottle group valve is opened, and when partition two needs to be protected, the bottle group valve and this two-position three-way valve are opened. This partition protection method improves the utilization efficiency of fire protection resources, avoids unnecessary waste of fire extinguishing agents, precisely controls according to the fire situations in different areas, and enhances the pertinence and effectiveness of the fire protection system. Brief Description of the Drawings

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

[0023] Figure 2 It is Figure 1 a schematic structural diagram of the valve core and its upper components in

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

[0025] The names of the parts referred to by each digital label in the above drawings are as follows:

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

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

[0028] 12—Actuator

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

[0030] 14—First seal

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

[0032] 16—Fourth seal

[0033] 17—Second seal

[0034] 18—Third seal

[0035] 19 - Compression member

[0036] 20 - Fifth seal

[0037] 21 - Sixth seal

[0038] 100 - Starting chamber Specific implementation mode

[0039] The following combines the attached Figures 1-3 and embodiments to further describe the present invention in detail.

[0040] Embodiment 1

[0041] Two - position three - way valve, including valve body 10 and spool 11 and driver 12 installed thereon. The driver 12 is threadedly fastened to the valve body 10. An elastic reset member is installed between the driver 12 and the spool 11. The elastic reset member is a spring. The driver 12 in this embodiment is an electromagnetic driver, and it can also be a motor in other embodiments. A starting chamber 100 is formed among the valve body 10, the spool 11 and the driver 12. The valve body 10 is provided with an inlet 101, a first outlet 102 and a second outlet 103. The spool 11 is provided with a spool channel 111 for communicating the starting chamber 100 with the second outlet 103. A plug 13 for opening and closing the second outlet 103 is installed at the lower end of the spool 11. The plug 13 is fastened to the spool 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 does not block the port of the second outlet 103, the inlet 101 is communicated with the second outlet 103;

[0042] A first seal 14 is installed between the spool 11 and the plug 13. The first seal 14 is an annular sealing gasket. A conversion sleeve 15 is sleeved on the spool 11. The lower end of the conversion sleeve 15 is axially limited on the valve body 10. A conversion chamber 151 communicated with the first outlet 102 is provided between the conversion sleeve 15 and the spool 11. The conversion chamber 151 opens downward;

[0043] When the driver 12 blocks the port of the spool channel 111, that is, the driver 12 abuts against the spool 11, the plug 13 blocks the upper port of the second outlet 103, the inlet 101 is separated from the second outlet 103 by the plug 13, the conversion sleeve 15 is separated from the first seal 14, and the inlet 101 is communicated with the first outlet 102 through the conversion chamber 151;

[0044] When the driver 12 is separated from the port of the spool passage 111, the high-pressure fluid at the inlet 101 pushes the spool 11 upward. The plug 13 moves synchronously with the spool 11. The inlet 101 communicates with 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 cavity 151, and the inlet 101 is cut off from the first outlet 102.

[0045] This two-position three-way valve can be switched under high-pressure conditions. In fire protection applications, this structure is paired with a fire extinguisher bottle group to achieve two-zone protection. When protection is required for Zone 1, the bottle group valve is opened. When protection is required for Zone 2, the bottle group valve and this valve are opened.

[0046] Working principle: When this two-position three-way valve works, the state of the driver 12 determines the position of the spool 11 and the connection of each passage. When the driver 12 blocks the port of the spool passage 111 and presses on the spool 11, the spool 11 moves downward. The plug 13 blocks the upper port of the second outlet 103, and the inlet 101 is cut off from the second outlet 103 by the plug 13. At the same time, the downward movement of the spool 11 causes the first seal 14 to separate from the conversion sleeve 15, and the fluid at the inlet 101 can communicate with the first outlet 102 through the conversion cavity 151.

[0047] When the driver 12 is separated from the port of the spool passage 111, the pressure in the starting cavity 100 is released to the second outlet 103 through the spool passage 111. The high-pressure fluid at the inlet 101 pushes the spool 11 upward. The plug 13 moves synchronously with the spool 11, and the inlet 101 communicates with the second outlet 103. At the same time, the first seal 14 moves upward with the spool 11 and seals on the conversion sleeve 15, sealing the port of the conversion cavity 151, thereby cutting off the inlet 101 from the first outlet 102.

[0048] The spool 11 includes an upper spool body 112 and a lower spool body 113. The spool 11 is an integral spool. The upper spool body 112 is arranged on the lower spool body 113. The outer diameter of the upper spool body 112 is larger than that of the lower spool body 113. The conversion sleeve 15 is sleeved on the lower spool body 113 and is hermetically connected to the valve body 10.

[0049] A fourth seal 16 that seals with the inner wall of the conversion sleeve 15 is sleeved on the lower spool body 113. The fourth seal 16 is an O-ring seal. The fourth seal 16 is arranged above the conversion cavity 151. The fourth seal 16 is used to prevent the high-pressure fluid in the valve body passage 104 from flowing into the conversion cavity 151 through the gap between the conversion sleeve 15 and the spool 11.

[0050] The conversion sleeve 15 is provided with a first through hole 152 for connecting the conversion cavity 151 and the first outlet 102. Both the upper and lower ends of the conversion sleeve 15 are provided with a second seal 17 and a third seal 18 that are sealed with the valve body 10. Both the first seal 17 and the second seal 18 are O-ring seals. The first through hole 152 is provided between the second seal 17 and the third seal 18. The first through hole 152 provided on the conversion sleeve 15 is used to connect the conversion cavity 151 and the first outlet 102, ensuring that in a specific working state of the valve, the fluid can flow from the inlet 101 through the conversion cavity 151 and the first through hole 152 to the first outlet 102 along the designed path, achieving precise control of the fluid flow direction and improving the accuracy and reliability of the valve operation. When the inlet 101 is connected to the second outlet 103, the second seal 17 and the third seal 18 prevent the fluid from flowing into the first outlet 102 in series and avoid misactivation of other partitions.

[0051] The opening of the conversion cavity 151 faces the first seal 14. The bottom of the conversion sleeve 15 is provided with a downwardly protruding sealing portion 153 having a conical shape. When the conversion sleeve 15 is sealed with the first seal 14, the actuator 12 is in the open state, the gasket on the actuator 12 is separated from the valve core 11, the high-pressure fluid pushes open the valve core 11, the valve core 11 drives the plug 13 to move upward, and the end face of the sealing portion 153 on the plug 13 is sealed on the first seal 14, thereby cutting off the connection between the inlet 101 and the first outlet 102. The design of the conical sealing portion 153 increases the sealing area and the tightness of the seal. Compared with ordinary planar sealing, it can better adapt to the pressure changes inside the valve and effectively prevent fluid leakage. Even in a high-pressure environment, it can ensure the sealing performance between the inlet 101 and the first outlet 102, improve the sealing reliability of the valve, and further enhance the safety and stability of the entire system.

[0052] The valve body 10 is provided with a valve body passage 104, and the valve core 11 is provided with a second through hole 114 communicating with the starting cavity 100. The inlet 101 is connected to the starting cavity 100 through the valve body passage 104 and the second through hole 114. When the actuator 12 is activated, the high-pressure fluid at the inlet 101 can push open the valve core 11 through the valve body passage 104, and the valve core 11 moves up and down to realize the switching of the high-pressure fluid line. This design simplifies the control method of the valve. By only controlling the actuator 12, the precise movement of the valve core 11 can be achieved by using high-pressure fluid, improving the convenience and accuracy of valve control and meeting the requirements for fluid line switching in different working scenarios.

[0053] The upper end of the plug 13 is threadedly connected to the valve core 11. A pressing member 19 is installed at the lower end of the plug 13. The outer shape of the pressing member 19 is T-shaped. The pressing member 19 is threadedly connected to the plug 13. A fifth seal 20 is installed between the pressing member 19 and the plug 13. The fifth seal 20 is an O-ring. When the plug 13 blocks the port of the second outlet 103, the fifth seal 20 seals with 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 greater than that of the small head 131. The small head 131 is arranged above the large head 132 and is threadedly connected to the valve core 11. The first seal 14 is sleeved on the small head 131. When the plug 13 is screwed tightly onto the valve core 11, the valve core 11 presses the first seal 14 against the large head 132 to form an end face seal. The threaded connection mode between the small head 131 and the valve core 11 makes the installation and disassembly of the plug 13 relatively convenient. During the installation process, the connection with the valve core 11 can be easily achieved by rotating the plug 13, and the pressing degree of the first seal 14 can be adjusted by screwing the plug 13 tightly or loosening it according to actual needs to achieve the best sealing effect, improving the convenience and flexibility of the operation.

[0055] A sixth seal 21 that seals with the inner wall of the valve core 11 is sleeved on the small head 131. The sixth seal 21 is an O-ring. The small head 131 seals with the valve core 11 through the sixth seal 21. The sixth seal 21 is to prevent the valve core channel 111 from leaking at the connection between the plug 13 and the valve core 11, further improving the seal between the plug 13 and the valve core 11.

[0056] Embodiment 2

[0057] The fire extinguishing device includes the two-way three-way valve in Embodiment 1.

Claims

1. Two-way three-port valve, comprising a valve body (10) and a valve core (11) and a driver (12) mounted thereon. An activation chamber (100) is formed among the valve body (10), the valve core (11) and the driver (12). The valve body (10) is provided with an inlet (101), a first outlet (102) and a second outlet (103). The valve core (11) is provided with a valve core passage (111) for communicating the activation chamber (100) with the second outlet (103). A plug (13) for opening and closing the second outlet (103) is mounted at the lower end of the valve core (11). It is characterized in that: A first seal (14) is installed between the valve core (11) and the plug (13). A conversion sleeve (15) is sleeved on the valve core (11). A conversion chamber (151) communicating with the first outlet (102) is provided between the conversion sleeve (15) and the valve core (11); When the driver (12) blocks the port of the valve core passage (111), 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) communicates with the first outlet (102) through the conversion chamber (151); When the driver (12) is separated from the port of the valve core passage (111), the high-pressure fluid at the inlet (101) pushes the valve core (11) to move upward. The inlet (101) communicates with the second outlet (103). The first seal (14) moves upward and seals on the conversion sleeve (15), and the inlet (101) is separated from the first outlet (102).

2. The two-way three-way valve according to claim 1, characterized in that: 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). The conversion sleeve (15) is sleeved on the lower core body (113) and is sealingly connected to the valve body (10).

3. The two-position three-way valve according to claim 2, wherein: A fourth seal (16) sealing with the inner wall of the conversion sleeve (15) is sleeved on the lower core body (113). The fourth seal (16) is arranged above the conversion chamber (151).

4. The two-way three-way valve according to claim 1, wherein: The conversion sleeve (15) is provided with a first through hole (152) for communicating the conversion chamber (151) with the first outlet (102). Second seals (17) and third seals (18) for sealing with the valve body (10) are provided at both the upper and lower ends of the conversion sleeve (15). The first through hole (152) is arranged between the second seal (17) and the third seal (18).

5. The two-way three-position valve according to claim 1 or 4, characterized in that: The opening of the conversion chamber (151) faces the first seal (14). The bottom of the conversion sleeve (15) is provided with a downwardly protruding sealing portion (153) in a conical shape. When the conversion sleeve (15) seals with the first seal (14), the end face of the sealing portion (153) seals on the first seal (14).

6. The two-position three-way valve according to claim 1, characterized in that: The valve body (10) is provided with a valve body passage (104). The valve core (11) is provided with a second through hole (114) communicating with the activation chamber (100). The inlet (101) communicates with the activation chamber (100) through the valve body passage (104) and the second through hole (114).

7. The two-way three-way valve according to claim 1, characterized in that: The upper end of the plug (13) is threadedly connected to the valve core (11). A pressing member (19) is installed at the lower end of the plug (13). A fifth seal (20) is installed between the pressing member (19) and the plug (13). When the plug (13) blocks the port of the second outlet (103), the fifth seal (20) seals the port of the second outlet (103).

8. The two-way three-way valve according to claim 1, characterized in that: The plug (13) includes a small head portion (131) and a large head portion (132). The outer diameter of the large head portion (132) is greater than the outer diameter of the small head portion (131). The small head portion (131) is provided above the large head portion (132) and is threadedly connected to the valve core (11). The first seal (14) is sleeved on the small head portion (131). When the plug (13) is screwed tightly onto the valve core (11), the valve core (11) presses the first seal (14) against the large head portion (132) to form an end face seal.

9. The two-position three-way valve according to claim 1, wherein: A sixth seal (21) that seals with the inner wall of the valve core (11) is sleeved on the small head portion (131). The small head portion (131) is sealed with the valve core (11) through the sixth seal (21).

10. Fire extinguishing equipment, characterized in that: It includes the two-way three-way valve according to any one of claims 1-9.

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