Gas-liquid mixing closed nozzle

Abstract

The invention relates to a gas-liquid mixing closed type sprayer, and relates to the field of fire-fighting sprayers. The nozzle body is provided with a nozzle and a plurality of inlet holes, each inlet hole is communicated with the nozzle, the nozzle body is provided with a blocking block for blocking the nozzle, the nozzle body is provided with a limiting frame, a glass bulb is arranged between the limiting frame and the nozzle body, one end of the glass bulb abuts against the limiting frame, and the other end of the glass bulb enables the blocking block to abut against the nozzle. The effect that the multiple atomization nozzles on the same pipeline work independently can be achieved.

Description

Technical Field

[0001] The present application relates to the field of fire sprinklers, and in particular to a gas-liquid mixed closed sprinkler. Background Art

[0002] Atomizing nozzles are one of the more commonly used nozzles in the field of fire fighting. Their excellent fire extinguishing performance can achieve the effect of rapid fire extinguishing in many special scenarios.

[0003] The atomizing nozzle includes a gas-liquid mixing nozzle, which is provided with a liquid inlet hole and an air inlet hole. When in use, it is necessary to connect the liquid supply pipe and the air supply pipe respectively. The gas and liquid are mixed in the nozzle and then sprayed out to form water mist for fire fighting. This type of atomizing nozzle is mostly normally open and needs to be used in series with a solenoid valve to control the opening and closing of the atomizing nozzle. Usually, multiple atomizing nozzles are connected in series on the liquid supply pipe and the air supply pipe. The solenoid valve is set on the liquid supply pipe and the air supply pipe to control the simultaneous opening and closing of each atomizing nozzle on the pipeline.

[0004] When different nozzles on the same pipeline need to be applied in different spaces, for example, when the nozzle is applied to the battery pack of the energy storage container, at least one nozzle needs to be installed in each battery pack, and each nozzle needs to be controlled to open separately. Once a fire occurs in a battery pack, the fire of the battery pack can be extinguished separately. To achieve this function, it is currently necessary to set a solenoid valve on the air pipe and the liquid supply pipe corresponding to each atomizing nozzle, so that each atomizing nozzle needs to be set with at least two solenoid valves. When the number of atomizing nozzles is large, a large number of solenoid valves need to be used. In actual operation, it is not convenient for the operator to install them, which affects the installation efficiency. In addition, too many solenoid valves will also increase the leakage rate and a series of other problems, which makes it difficult to implement in practice. Summary of the invention

[0005] In order to solve the above technical problems and realize the effect of facilitating the control of the atomizing nozzle to work independently, the present application provides a gas-liquid mixing closed nozzle.

[0006] The present application provides a gas-liquid mixing closed nozzle adopts the following technical solution: A gas-liquid mixing closed nozzle comprises a nozzle body, wherein the nozzle body is provided with a nozzle and a plurality of inlet holes, each of the inlet holes is connected to the nozzle, and is characterized in that: a blocking block for blocking the nozzle is provided on the nozzle body, a limiting frame is provided on the nozzle body, a glass bubble is provided between the limiting frame and the nozzle body, one end of the glass bubble is pressed against the limiting frame, and the other end of the glass bubble presses the blocking block against the nozzle.

[0007] By adopting the above technical solution, different inlet holes are connected to the air supply pipe and the liquid supply pipe, and the glass bubble presses the block against the nozzle position of the nozzle body to achieve the blocking effect on the nozzle, so that the atomizing nozzle is in a normally closed state, so there is no need to add an additional solenoid valve. When the fire in the battery pack causes the temperature to rise, the glass bubble ruptures at high temperature, thereby releasing the blocking effect on the nozzle. Under the pressure of gas and liquid, the block is pushed out, and the gas and liquid are sprayed through the nozzle to form water mist, achieving the fire extinguishing effect. The block is limited by the glass bubble, thereby achieving the blocking effect of the block on the nozzle. The glass bubble ruptures at high temperature, causing the nozzle to open and spray water mist, so that each atomizing nozzle can work independently.

[0008] Optionally, the nozzle body includes a nozzle seat and a spray head, the inlet hole is arranged on the nozzle seat, the nozzle is arranged on the spray head, a mixing chamber connected with the nozzle is arranged in the spray head, and the mixing chamber can be connected with each of the inlet holes, and the spray head can be detachably arranged on the nozzle seat.

[0009] By adopting the above technical scheme, gas and liquid enter the mixing chamber from the corresponding inlet holes to be mixed, and then are sprayed out by the nozzle, so that the water mist is more uniform, which is beneficial to improving the fire extinguishing effect of the atomizing nozzle; in addition, the sprinkler head and the sprinkler head seat are detachably connected, which is convenient for processing the mixing chamber on the one hand, and convenient for the operator to replace the sprinkler head or the sprinkler head seat on the other hand.

[0010] Optionally, a connecting body is detachably connected between the nozzle seat and the sprinkler head, and one or more first flow channels and one or more second flow channels are arranged in the connecting body. Two inlet holes are arranged, which are used for air intake and liquid intake respectively. One end of the first flow channel and the second flow channel are connected to the mixing chamber, and the other end of the first flow channel is connected to one of the inlet holes, and the other end of the second flow channel is connected to the other inlet hole.

[0011] Optionally, one first flow channel is provided, and a plurality of second flow channels are provided around the first flow channel.

[0012] By adopting the above technical solution, the operator can connect the inlet hole connected to the first flow channel to the air supply pipe, connect the inlet hole connected to the second flow channel to the liquid supply pipe, and make multiple streams of water flow to the air flow ejected from the first flow channel to further improve the gas-liquid mixing effect. The operator can also connect the inlet hole connected to the first flow channel to the liquid supply pipe, and connect the inlet hole connected to the second flow channel to the air supply pipe, so that multiple streams of air flow to the water flow ejected from the first flow channel to further improve the gas-liquid mixing effect. By increasing the gas-liquid mixing effect, a finer water mist is formed, further improving the atomization effect of the atomizing nozzle, and thus improving its fire extinguishing effect.

[0013] Optionally, one end of the second flow channel close to the mixing chamber is inclined toward the first flow channel.

[0014] By adopting the above technical solution, the injection direction of each second flow channel intersects with the injection direction of the first flow channel, which is beneficial to the rapid mixing of gas and liquid.

[0015] Optionally, a screw hole is opened on the nozzle seat, and the screw hole is connected to one of the inlet holes. A screw sleeve connected to the first flow channel is provided on the connecting body, and the screw sleeve can be threadedly matched with the screw hole. A first annular groove is opened on one end of the connecting body facing the nozzle seat, and each of the second flow channels is connected to the first annular groove. A second annular groove is opened on the nozzle seat, and the second annular groove is connected to another inlet hole, and the first annular groove can be mutually connected with the second annular groove.

[0016] By adopting the above technical solution, the threaded sleeve on the connecting body is threadedly connected to the screw hole on the nozzle seat, so as to realize a detachable connection between the connecting body and the nozzle seat. After the connecting body is connected to the nozzle seat, the first flow channel is connected to one of the inlet holes of the nozzle seat, and the first annular groove is connected to the second annular groove, so that each second flow channel is connected to another inlet hole to facilitate gas-liquid mixing.

[0017] Optionally, a sealing ring is sleeved on the threaded sleeve and is pressed between the connecting body and the nozzle seat. The sealing ring covers between the first annular groove and the second annular groove, and a through hole connecting the first annular groove and the second annular groove is opened on the sealing ring.

[0018] By adopting the above technical solution and setting a sealing ring, the connection sealing between the connecting body and the nozzle seat is improved, thereby improving the sealing effect of the connection position between the first flow channel and the second flow channel and the corresponding inlet hole.

[0019] Optionally, a sealing cylinder connected to the first flow channel is provided at one end of the connecting body facing the sprinkler head, a gap for gas or liquid to pass through is left between the sealing cylinder and the inner wall of the mixing chamber, and an insert block for inserting the sealing cylinder is provided on the blocking block.

[0020] By adopting the above technical solution, the sealing cylinder is inserted into the sealing cylinder to achieve the blocking effect on the first flow channel. When the blocking block blocks the nozzle, the first flow channel and the second flow channel are separated from each other, thereby reducing the pressure difference between the air supply pipe and the liquid supply pipe, which causes the gas to flow toward the liquid supply pipe, or the liquid to flow toward the air supply pipe.

[0021] Optionally, a ring plate is connected to the limit frame, a limit nut is threadedly connected to the nozzle body, a limit ring is provided at one end of the limit nut facing the limit frame, and the limit ring is used to press the ring plate onto the nozzle body.

[0022] By adopting the above technical solution, the operator presses the ring plate onto the nozzle body through the limiting ring on the limiting nut to realize the detachable connection of the limiting frame on the nozzle body, which is convenient for the operator to install, disassemble or replace the glass bulb.

[0023] Optionally, the glass bulb is connected to a conductive wire.

[0024] By adopting the above technical solution, when the operator detects a fire risk in the battery pack through other means or methods, the operator can energize the wire to cause the glass bulb to rupture due to heat, thereby opening the atomizing nozzle to achieve the effect of cooling and extinguishing the fire.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The glass bubble limits the blockage, thereby achieving the blocking effect of the blockage on the nozzle. The glass bubble breaks at high temperature, causing the nozzle to open and spray water mist, so that each nozzle can work independently; 2. While the block blocks the nozzle, the sealing cylinder is sealed by the plug block, thereby separating the first flow channel from the second flow channel, reducing the pressure difference between the air supply pipe and the liquid supply pipe, causing the gas to flow into the liquid supply pipe, or the liquid to flow into the air supply pipe, thereby affecting the normal use of the nozzle; 3. A wire is set on the glass bulb. When the operator detects that a battery pack is abnormal and there is a risk of fire through other detection methods, the operator inputs current into the wire to make the glass bulb rupture due to heat, thereby achieving the effect of actively spraying water to prevent fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0027] Figure 2 It is an exploded diagram of the shower head and the shower head used to reflect the embodiment 1 of the present application.

[0028] Figure 3 It is a cross-sectional view of the first flow channel and the second flow channel used in Example 1 of the present application.

[0029] Figure 4 It is a cross-sectional view of the sealing cylinder and the insert block according to the second embodiment of the present application.

[0030] Figure 5 yes Figure 4 A magnified schematic diagram of position A in the middle.

[0031] Figure 6 It is a schematic diagram of the overall structure of Example 3 of the present application.

[0032] Explanation of the reference numerals: 1. nozzle body; 11. inlet hole; 12. nozzle; 13. wire; 2. blocking block; 21. limiting frame; 22. glass bulb; 23. limiting groove; 24. first sealing member; 25. first sink groove; 31. ring plate; 32. receiving groove; 33. limiting nut; 34. limiting ring; 4. nozzle seat; 41. spray head; 42. mixing chamber; 43. spray head; 44. first flow channel; 45. second flow channel; 5. screw sleeve; 51. screw hole; 52. first annular groove; 53. second annular groove; 54. sealing ring; 55. second sink groove; 56. through hole; 6. connecting sleeve; 61. third sink groove; 62. second sealing member; 7. sealing cylinder; 71. plug-in block; 72. third sealing member; 73. step groove. Implementation

[0033] The following is combined with Figure 1-6 This application is described in further detail. Example 1

[0034] The present application discloses a gas-liquid mixing closed nozzle. Figure 1 and Figure 2 The gas-liquid mixing closed nozzle includes a nozzle body 1, on which a nozzle 12 and a plurality of inlet holes 11 are provided, and the inlet holes 11 are used to connect to a gas supply pipe or a liquid supply pipe. In the embodiment of the present application, two inlet holes 11 are provided on the nozzle body 1, and the two inlet holes 11 are used to connect to a liquid supply pipe and a gas supply pipe respectively. The liquid supply pipe is used to deliver water to the nozzle body 1, and the gas supply pipe is used to deliver argon, helium, carbon dioxide or other gases that can be used for fire extinguishing into the nozzle body 1.

[0035] like Figure 2 and Figure 3 The nozzle body 1 is provided with a blocking block 2 at the position of the nozzle 12, and the blocking block 2 is used to block the nozzle 12. A limit frame 21 is detachably provided at one end of the nozzle body 1 close to the nozzle 12, and a glass bulb 22 is provided between the limit frame 21 and the blocking block 2. The glass bulb 22 contains a liquid that expands when heated. When the temperature at the position where the glass bulb 22 is located increases, the liquid in the glass bulb 22 expands, which can cause the glass bulb 22 to rupture. The glass bulb 22 is cylindrical, and the glass bulb 22 is supported between the limit frame 21 and the blocking block 2, so that the glass bulb 22 maintains the state of blocking the nozzle 12. The opposite surfaces of the blocking block 2 and the limit frame 21 are both provided with a limiting groove 23 for limiting the end of the glass bulb 22.

[0036] The nozzle body 1 is inserted into the nozzle 12, and a circle of first grooves 25 are provided at one end of the blocking block 2 away from the glass bulb 22, and a first sealing member 24 is embedded in the first groove 25. The first sealing member 24 can be a sealing ring made of rubber. When the blocking block 2 is pressed against the nozzle 12 under the pushing action of the glass bulb 22, the first sealing member 24 on the plug 71 is pressed against the inner wall of the nozzle 12, further sealing the blocking block 2 and the nozzle 12, reducing the leakage of gas and liquid from the gap between the blocking block 2 and the nozzle 12, which is conducive to further improving the sealing effect of the blocking block 2 on the nozzle 12.

[0037] The limit frame 21 can be fixedly connected to the nozzle body 1 through a threaded member, and a threaded sleeve can be provided on the limit frame 21, and the threaded sleeve is threadedly connected to the nozzle body 1. In the embodiment of the present application, the limit frame 21 is fixedly connected to the ring plate 31 through a connecting rod at one end facing the nozzle body 1, and the outer ring of the ring plate 31 extends along its own radial direction to form a positive projection of the limit frame 21 on the ring plate 31. An annular receiving groove 32 is provided at one end of the nozzle body 1 close to the nozzle 12, and the receiving groove 32 is used for the ring plate 31 to be plugged in. A limit nut 33 is sleeved at one end of the nozzle body 1 close to the nozzle 12, and a thread is provided at one end of the nozzle body 1 close to the nozzle 12 for threaded connection with the limit nut 33. A limit ring 34 is fixedly connected to one end of the limit nut 33, and the inner diameter of the limit nut 33 is larger than the outer diameter of the ring plate 31, and the inner diameter of the limit ring 34 is smaller than the outer diameter of the ring plate 31, and both the limit frame 21 and the connecting rod can pass through the inner ring of the limit ring 34.

[0038] The operator inserts the ring plate 31 on the limit frame 21 into the receiving groove 32, and then sleeves the limit nut 33 on the limit frame 21 and the connecting rod. By screwing the limit nut 33, the limit nut 33 is threadedly connected to the nozzle body 1, and the limit ring 34 presses the ring plate 31 into the receiving groove 32, thereby realizing the detachable installation of the limit frame 21 on the nozzle body 1.

[0039] In some embodiments, the nozzle body 1 includes a nozzle seat 4 and a spray head 41 detachably mounted on the nozzle seat 4. The end of the spray head 41 facing the nozzle seat 4 is integrally formed or later cut and processed to have a mixing chamber 42. The mixing chamber 42 is connected to the nozzle 12. When the spray head 41 is installed on the nozzle body 1, the two inlet holes 11 on the nozzle body 1 are both connected to the mixing chamber 42. The spray head 41 can be connected by a threaded member or by a flange connection to achieve a detachable connection.

[0040] In the embodiment of the present application, a connecting body 43 is provided between the nozzle seat 4 and the spray head 41 , and one end of the connecting body 43 is detachably connected to the nozzle seat 4 , and the other end of the connecting body 43 is detachably connected to the spray head 41 .

[0041] The connection body 43 and the nozzle seat 4 and the spray head 41 can be connected by screws or by flange connection to achieve detachable connection. The connection body 43 is integrally formed or post-processed with a first flow channel 44 and a second flow channel 45. One end of the first flow channel 44 and the second flow channel 45 are connected to the mixing chamber 42 of the spray head 41. The end of the first flow channel 44 away from the spray head 41 is connected to one of the inlet holes 11 of the nozzle seat 4, and the end of the second flow channel 45 away from the spray head 41 is connected to another inlet hole 11 of the nozzle seat 4. One or more first flow channels 44 and second flow channels 45 can be provided, and the arrangement is not unique.

[0042] In the embodiment of the present application, the connection body 43 is a rotating body, and one first flow channel 44 is provided in the connection body 43, and the first flow channel 44 is coaxially arranged with the connection body 43. A plurality of second flow channels 45 are provided in the connection body 43, and the plurality of second flow channels 45 are evenly arranged in the circumferential direction around the first flow channel 44.

[0043] The second flow channel 45 has different shapes and can be set at an angle or parallel to the first flow channel 44. In the embodiment of the present application, one end of each second flow channel 45 close to the spray head 41 is inclined toward the first flow channel 44, so that the flow direction of the second flow channel 45 intersects with the flow direction of the first flow channel 44.

[0044] Gas and liquid are transported in the first flow channel 44 and the second flow channel 45 respectively, and gas can be passed through the first flow channel 44 and liquid can be passed through the second flow channel 45, or liquid can be passed through the first flow channel 44 and gas can be passed through the second flow channel 45. The gas and liquid flow out of the connecting body 43, and are mixed in the mixing chamber 42, and finally atomized liquid is sprayed out through the nozzle 12, which is conducive to improving the fire extinguishing effect of the nozzle.

[0045] In some embodiments, a screw sleeve 5 is fixedly connected to one end of the connection body 43 facing the nozzle seat 4, and the screw sleeve 5 has a thread disposed on the outer peripheral surface of the screw sleeve 5. The screw sleeve 5 is coaxially disposed with the first flow channel 44 and is interconnected with the first flow channel 44. A screw hole 51 for threading with the screw sleeve 5 is provided on the nozzle body 1, and the screw hole 51 is communicated with one of the inlet holes 11. When the screw sleeve 5 is threadedly connected in the screw hole 51, the first flow channel 44 is communicated with the inlet hole 11 corresponding to the screw hole 51.

[0046] The end of the connection body 43 facing the nozzle seat 4 is integrally formed or later provided with a first annular groove 52, and each second flow channel 45 is connected to the first annular groove 52. The end of the nozzle seat 4 facing the connection body 43 is provided with a second annular groove 53, and the second annular groove 53 is connected to another inlet hole 11. When the screw sleeve 5 on the connection body 43 is threadedly connected to the screw hole 51, the first annular groove 52 is connected to the second annular groove 53.

[0047] A sealing ring 54 is provided between the connecting body 43 and the nozzle seat 4. The sealing ring 54 is made of rubber and has elasticity. The nozzle seat 4 is provided with a circle of second recessed grooves 55 outside the screw hole 51 for accommodating the sealing ring 54. The second annular groove 53 is located on the bottom wall of the second recessed groove 55. When the sealing ring 54 is placed in the second annular groove 53, the sealing ring 54 blocks the notch of the second annular groove 53. When the screw sleeve 5 on the connecting body 43 is threadedly connected to the screw hole 51 on the nozzle seat 4, the sealing ring 54 is blocked between the first annular groove 52 and the second annular groove 53. A plurality of through holes 56 are provided on the sealing ring 54 for connecting the first annular groove 52 and the second annular groove 53, so as to realize that each second flow channel 45 is connected to the inlet hole 11 corresponding to the second annular groove 53.

[0048] The end of the spray head 41 facing the connection body 43 is provided with a connection sleeve 6, and the connection sleeve 6 is connected to the mixing chamber 42. The inner wall of the connection sleeve 6 is provided with a thread, and the outer wall of the connection body 43 facing the end of the spray head 41 is provided with an external thread, and the connection sleeve 6 can be threadedly connected to the connection body 43, so that the spray head 41 can be detachably connected to the connection body 43. The connection sleeve 6 is provided with a circle of third grooves 61 coaxially close to the mounting seat, and the connection sleeve 6 is provided with a second sealing member 62 in the corresponding third groove 61, and the second sealing member 62 can be an annular sealing ring, and the second sealing member 62 is made of rubber. When the connection sleeve 6 is threadedly connected to the connection body 43, the connection body 43 presses the second sealing member 62 onto the connection sleeve 6, so as to achieve the connection sealing between the spray head 41 and the connection body 43.

[0049] The implementation principle of the embodiment of the present application is as follows: the operator installs the nozzle body 1 in the battery pack. When the fire in the battery pack causes the temperature to rise, the liquid medium in the glass bulb 22 will expand due to the heat, causing the glass bulb 22 to rupture. The rupture of the glass bulb 22 will release the pushing effect on the block 2, and the block 2 will be pushed out of the nozzle 12 under the pressure of the gas and liquid, thereby releasing the blocking effect on the nozzle 12. The gas and liquid are mixed in the mixing chamber 42 and then sprayed out from the nozzle 12 under the pressure to form fine water mist, thereby achieving the fire extinguishing effect on the battery pack on fire.

[0050] The traditional method of controlling the opening and closing of the atomizing nozzle through a solenoid valve is to either set multiple solenoid valves on each atomizing nozzle, which makes installation inconvenient. When the number of atomizing nozzles is large, it is inconvenient to control the atomizing nozzles individually, or one solenoid valve controls multiple atomizing nozzles, resulting in the atomizing nozzles being unable to work alone. The atomizing nozzle disclosed in this application sets the atomizing nozzle to a normally closed state, and can be automatically triggered according to the temperature increase. There is no need to install a large number of solenoid valves, which reduces the difficulty of installation and operation control. In addition, each atomizing nozzle can work independently, which is more conducive to reducing resource waste compared to opening and closing multiple atomizing nozzles at the same time. Example 2

[0051] like Figure 4 and Figure 5 , the difference between Example 2 of the present application and Example 1 is that: a sealing cylinder 7 is coaxially arranged at one end of the connection body 43 facing the spray head 41, and a gap is left between the sealing cylinder 7 and the inner wall of the mixing chamber 42 for the passage of gas and liquid. The sealing cylinder 7 can be fixedly connected to the connection body 43, can be threadedly connected to the connection body 43, or can be fixedly connected to the connection body 43 by welding or gluing. The sealing cylinder 7 is coaxially arranged with the first flow channel 44 of the connection body 43, and the first flow channel 44 is connected to the sealing cylinder 7. The end of the block 2 extending into the nozzle 12 is fixedly connected with an insert block 71 for inserting the sealing cylinder 7, and the insert block 71 is cylindrical.

[0052] A circle of stepped groove 73 is formed on one end of the plug block 71 facing the sealing cylinder 7, and a third sealing member 72 is sleeved on the plug block 71, and the third sealing member 72 is located in the stepped groove 73. When the plug block 2 blocks the nozzle 12, the groove wall of the stepped groove 73 presses the third sealing member 72 against the end surface of the sealing cylinder 7 away from the connecting body 43.

[0053] In this way, while the blocking block 2 blocks the nozzle 12, the sealing tube 7 is sealed by the insert block 71, thereby separating the first flow channel 44 and the second flow channel 45, thereby reducing the pressure difference between the air supply pipe and the liquid supply pipe, causing gas to flow into the liquid supply pipe, or liquid to flow into the air supply pipe, thereby affecting the normal use of the nozzle. Example 3

[0054] like Figure 6 The difference between Example 3 of the present application and Example 1 is that a conductive wire 13 is provided on the glass bulb 22. When the operator detects that a battery pack is abnormal and there is a risk of fire through other detection methods, the operator inputs current into the wire 13 to cause the glass bulb 22 to rupture due to heat, thereby achieving the effect of actively spraying water to prevent fire.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A closed type gas-liquid mixing nozzle, comprising a nozzle body (1), wherein the nozzle body (1) is provided with a nozzle (12) and a plurality of inlet holes (11), wherein each of the inlet holes (11) is connected to the nozzle (12), characterized in that: The nozzle body (1) is provided with a blocking block (2) for blocking the nozzle (12); a limiting frame (21) is provided on the nozzle body (1); a glass bulb (22) is provided between the limiting frame (21) and the nozzle body (1); one end of the glass bulb (22) is pressed against the limiting frame (21); and the other end of the glass bulb (22) presses the blocking block (2) against the nozzle (12).

2. A gas-liquid mixing closed nozzle according to claim 1, characterized in that: The nozzle body (1) comprises a nozzle seat (4) and a spray head (41); the inlet hole (11) is arranged on the nozzle seat (4); the nozzle (12) is arranged on the spray head (41); a mixing chamber (42) connected to the nozzle (12) is arranged in the spray head (41); and the mixing chamber (42) can be connected to each of the inlet holes (11); and the spray head (41) is detachably arranged on the nozzle seat (4).

3. A gas-liquid mixing closed nozzle according to claim 2, characterized in that: A connecting body (43) is detachably connected between the nozzle seat (4) and the spray head (41), and one or more first flow channels (44) and one or more second flow channels (45) are arranged in the connecting body (43). Two inlet holes (11) are arranged, and one end of each of the first flow channel (44) and the second flow channel (45) is connected to the mixing chamber (42), and the other end of the first flow channel (44) is connected to one of the inlet holes (11), and the other end of the second flow channel (45) is connected to another inlet hole (11).

4. A gas-liquid mixing closed nozzle according to claim 3, characterized in that: One first flow channel (44) is provided, and a plurality of second flow channels (45) are provided around the first flow channel (44).

5. A gas-liquid mixing closed nozzle according to claim 4, characterized in that: One end of the second flow channel (45) close to the mixing chamber (42) is inclined toward the first flow channel (44).

6. A gas-liquid mixing closed nozzle according to claim 4, characterized in that: The nozzle seat (4) is provided with a screw hole (51), and the screw hole (51) is connected to one of the inlet holes (11). The connecting body (43) is provided with a screw sleeve (5) connected to the first flow channel (44), and the screw sleeve (5) can be threadedly matched with the screw hole (51). The connecting body (43) is provided with a first annular groove (52) at one end facing the nozzle seat (4), and each of the second flow channels (45) is connected to the first annular groove (52). The nozzle seat (4) is provided with a second annular groove (53), and the second annular groove (53) is connected to another of the inlet holes (11), and the first annular groove (52) can be connected to the second annular groove (53).

7. A gas-liquid mixing closed nozzle according to claim 6, characterized in that: A sealing ring (54) is sleeved on the threaded sleeve (5), and the sealing ring (54) is pressed between the connecting body (43) and the nozzle seat (4), the sealing ring (54) covers the first annular groove (52) and the second annular groove (53), and a through hole (56) is opened on the sealing ring (54) to connect the first annular groove (52) and the second annular groove (53).

8. The closed gas-liquid mixing nozzle according to claim 3, characterized in that: A sealing cylinder (7) connected to the first flow channel (44) is provided at one end of the connecting body (43) facing the spray head (41), a gap for gas or liquid to pass through is left between the sealing cylinder (7) and the inner wall of the mixing chamber (42), and an insert block (71) for inserting the sealing cylinder (7) is provided on the blocking block (2).

9. The closed gas-liquid mixing nozzle according to claim 1, characterized in that: The limiting frame (21) is connected to a ring plate (31), the nozzle (12) body is threadedly connected to a limiting nut (33), and a limiting ring (34) is provided at one end of the limiting nut (33) facing the limiting frame (21), and the limiting ring (34) is used to press the ring plate (31) onto the nozzle body (1).

10. The closed type gas-liquid mixing nozzle according to claim 1, characterized in that: The glass bulb (22) is connected to a conductive wire (13) for conducting electricity.

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