Nitrogen supply valve

Abstract

This application discloses a nitrogen supply valve, relating to the technical field of nitrogen supply systems. It includes a valve body comprising an inlet chamber and an outlet chamber, with a valve hole at the bottom of the inlet chamber; a main valve chamber mounted above the valve body, containing a first diaphragm plate; a valve core for sealing the valve hole; a communicating vessel fixed to the top of the main valve chamber; a pilot chamber mounted on top of the communicating vessel, containing a second diaphragm plate; a pilot core mounted on the second diaphragm plate, with its bottom end located within the communicating vessel; a pressure inlet pipe, one end connected to the inlet chamber and the other end connected to the communicating vessel; a pressure replenishment pipe, one end connected to the outlet chamber and the other end connected to the upper valve chamber; an active pipe, one end connected to the outlet chamber and the other end connected to the upper chamber; and a pressure regulating pipe, one end connected to the communicating vessel and the other end connected to the lower valve chamber, also connected to a distribution valve, which communicates with the upper valve chamber. This application improves the efficiency and accuracy of the nitrogen supply valve's response to downstream pressure.

Description

Technical Field

[0001] This application relates to the technical field of nitrogen supply systems, and in particular to a nitrogen supply valve. Background Technology

[0002] The nitrogen supply valve, also known as the nitrogen sealing valve, is part of the tank nitrogen supply system and is mainly used to control the supply of nitrogen to the tank.

[0003] Nitrogen supply valves are commonly self-operated regulating valves with pilot valves. These valves do not require external power or instruments; the pressure downstream of the valve acts on the pilot valve, enabling adaptive opening and closing of the valve port. Commercially available self-operated regulating valves with pilot valves can meet the needs of most storage tank nitrogen sealing systems. However, for storage tank systems with high pressure requirements or tanks containing highly oxidizing chemicals, a pressure regulation accuracy of 0.3 kPa is required, which existing nitrogen supply valves cannot easily meet. The main reason is that self-operated regulating valves with pilot valves have a certain response time. Therefore, improving the response efficiency and accuracy of existing nitrogen supply valves is a key challenge in nitrogen supply valve development. Summary of the Invention

[0004] The purpose of this invention is to provide a nitrogen supply valve that solves the technical problem of low efficiency and accuracy in response to downstream pressure in existing nitrogen supply valves. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A nitrogen supply valve, including

[0007] The valve body includes an air inlet chamber and an air outlet chamber, and the bottom of the air inlet chamber is provided with a valve hole that communicates with the air outlet chamber;

[0008] The main valve chamber is mounted above the valve body and contains a first diaphragm plate, which divides the main valve chamber into an upper valve chamber and a lower valve chamber.

[0009] The valve core is mounted on the first diaphragm plate, with its bottom end located inside the air intake chamber, and is used to seal the valve orifice.

[0010] The communicating vessel is fixed at the top of the main valve chamber;

[0011] The command chamber is installed on top of the communicating vessel and has a second membrane plate inside, which divides the command chamber into an upper chamber and a lower chamber.

[0012] The conductor core is mounted on the second diaphragm plate, with its bottom end located inside the communicating vessel;

[0013] The pressure inlet pipe is connected to the air inlet chamber at one end and to the communicating vessel at the other end, with a pressure reducing valve installed in the middle.

[0014] The pressure-reducing pipe is connected at one end to the air outlet chamber and at the other end to the upper valve chamber.

[0015] The active tube is connected at one end to the outlet chamber and at the other end to the upper chamber.

[0016] The pressure regulating pipe is connected to the communicating vessel at one end and to the lower valve chamber at the other end. It is also connected to the distribution valve, which connects to the upper valve chamber.

[0017] The pressure inlet pipe and the pressure replenishment pipe are connected within the communicating vessel, and the gas flow rate is controlled by the sliding of the conductor core.

[0018] By adopting the above technical solution, when the pressure in the outlet chamber is low, the pressure in the upper chamber decreases, causing the second diaphragm to move upward due to the pressure. This, in turn, causes the pilot valve core to move upward, allowing the pressure from the inlet pipe to enter the pressure regulating pipe through the connector. The pressure is then distributed to the upper and lower valve chambers in different proportions via the distribution valve. Because the pressure in the outlet chamber decreases, the pressure in the upper valve chamber also decreases. Combined with the pressure supplied to the lower valve chamber by the pressure regulating pipe, the pressure in the lower valve chamber becomes greater than the pressure in the upper valve chamber, causing the first diaphragm to move upward. This, in turn, causes the valve core to move upward, opening the valve orifice for nitrogen replenishment.

[0019] When the outlet pressure is high, the pressure in the upper chamber increases, causing the second diaphragm to move downwards, which in turn moves the pilot valve core downwards. As the pilot valve core blocks the inlet and outlet pressure lines, the pressure in the lower valve chamber decreases, while the pressure in the upper valve chamber increases under the influence of the outlet pressure line. This causes the first diaphragm to move downwards, pulling the valve core down to seal the valve orifice. The higher the outlet pressure, the tighter the valve core seal. This method amplifies the pilot valve's action, thereby improving the response speed and accuracy of the nitrogen supply valve.

[0020] Optionally, a compression spring is fixedly installed on the top wall of the upper valve chamber. The bottom end of the compression spring abuts against the first diaphragm plate. When the pressure in the upper valve chamber and the lower valve chamber is equal, the compression spring causes the valve core to be in the position of closing the valve orifice.

[0021] By adopting the above technical solution, the setting of the compression spring can effectively improve the stability of the valve core position, while also limiting the displacement range of the valve core, and further improving the service life of the first diaphragm plate.

[0022] Optionally, a stabilizing cylinder is installed on the top of the command chamber, with the top of the command core located inside the stabilizing cylinder. A stabilizing spring is fixed to the bottom wall of the stabilizing cylinder, with the top of the stabilizing spring abutting against the top part of the command core.

[0023] By adopting the above technical solution, the setting of the stabilizing cylinder and the cooperation of the stabilizing spring effectively improve the stability of the initial position of the controller core, realize the pressure adjustment of the second diaphragm plate, and also improve the service life of the second diaphragm plate.

[0024] Optionally, the communicating vessel has a first chamber and a second chamber. The first chamber is connected to the pressure regulating pipe, and the second chamber is connected to the pressure inlet pipe. The first chamber has a first through hole that communicates with the second chamber. The controller core is fixed with a first plug. When the controller core moves down, it can block the first through hole through the first plug.

[0025] By adopting the above technical solution, this method not only realizes the connection between the pressure inlet pipe and the pressure regulating pipe inside the communicating vessel, but also realizes the switching of the blocking and connection of the pressure regulating pipe and the pressure inlet pipe by the sliding control of the controller core.

[0026] Optionally, the intake chamber is connected to a first regulating pipe, the other end of which is connected to the lower chamber. The first regulating pipe is also equipped with a pressure reducing valve.

[0027] By adopting the above technical solution, the first regulating pipe reduces the pressure in the intake chamber and provides it to the lower chamber, thereby realizing the adjustment of the movement amplitude of the controller core and the adjustment of the valve core opening pressure.

[0028] Optionally, the communicating vessel is further provided with a third chamber and a fourth chamber. The third chamber is provided with a second through hole that communicates with the fourth chamber. The conductor core is fixed with a second plug. When the conductor core moves down, it can block the second through hole through the second plug.

[0029] The lower chamber is connected to a second regulating tube, and the other end of the second regulating tube is connected to a third chamber.

[0030] The lower valve chamber is connected to a third regulating pipe, and the other end of the third regulating pipe is connected to a fourth chamber.

[0031] By adopting the above technical solution, the second regulating pipe transmits the gas in the lower valve chamber to the lower valve cavity through the communicating vessel, providing pressure to the lower valve cavity together with the pressure regulating pipe. Since the pressure in the lower chamber remains constant, if the pressure in the outlet chamber increases, the pressure in the upper chamber will also gradually increase, causing the valve core to move downwards. Consequently, both the second and first through holes are blocked, stopping the pressure supply to the lower valve cavity. The pressure replenishing pipe continues to replenish the pressure to the lower valve cavity, thus causing the valve core to move downwards. Because the lower valve cavity stops receiving pressure from two sources, the pressure difference increases, the valve core moves faster, and the sealing effect is better.

[0032] Optionally, the bottom portion of the controller core located at the second through hole is a gradient shape, with the diameter of the gradient shape gradually increasing from bottom to top, and the second plug is fixed on the top of the gradient shape.

[0033] By adopting the above technical solution, the gradual change setting can gradually reduce the pressure provided by the third regulating pipe to the downward valve chamber during the downward movement of the controller core, realizing the pre-adjustment of the valve core action. Compared with the traditional setting, it can further improve the response efficiency and accuracy of the nitrogen supply valve.

[0034] Optionally, the gradient shape is slidably connected to the bottom of the controller core, and a compression spring is provided on the top of the gradient shape. The top of the compression spring is fixedly connected to the controller core, so that the second through hole can remain open after the second plug closes the second through hole.

[0035] By adopting the above technical solution, the sliding setting and compression spring setting of the gradual changer can enable the gradual changer to close the second through hole through the second plug and then allow the pilot core to continue to move downward, and then close the first through hole through the first plug. This achieves a step-like response speed between the valve core and the outlet chamber pressure. Since the pressure provided to the lower valve chamber by the third regulating pipe under normal conditions is greater than the pressure provided to the lower valve chamber by the pressure regulating pipe (the pressure regulating pipe also provides pressure to the upper valve chamber), during the process of the pilot core moving after the second through hole is closed by the second plug, the displacement and pressure adjustment of the valve core are further fine-tuned, improving the response efficiency and accuracy of the nitrogen supply valve.

[0036] Optionally, the second diaphragm is fitted with a stiffening shell, which is fastened to the second diaphragm by a nut on the controller core.

[0037] By adopting the above technical solution, the rib shell can effectively protect the second diaphragm, ensuring that the second diaphragm will not shift downwards locally, and improving the response accuracy of the pilot valve.

[0038] Optionally, a concave shell is installed on the first diaphragm plate, and the concave shell is fastened to the first diaphragm plate by a nut on the valve core, with the compression spring pressing against the inner wall of the concave shell.

[0039] By adopting the above technical solution, the concave shell can protect the first diaphragm plate, reduce the local downward movement of the first diaphragm plate, enable the first diaphragm plate to move as a whole over a large area, and improve the response accuracy of the valve core.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] When the pressure in the outlet chamber decreases, the pressure in the upper chamber also decreases. The second diaphragm moves the pilot valve core upward, opening the first through hole and connecting the pressure inlet pipe and the pressure regulating pipe. This restores pressure to the lower valve chamber, causing the first diaphragm to move the valve core upward, connecting the inlet and outlet chambers for gas supply. When the pressure in the outlet chamber increases, the second diaphragm moves the pilot valve core downward to reset. Simultaneously, the pressure in the upper valve chamber also increases, causing the valve core to move downward. Once the pilot valve core closes the first through hole, the pressure supply to the pressure regulating pipe stops, reducing the pressure in the lower valve chamber. This causes the valve core to press downward, closing the valve orifice, thus achieving self-response regulation of the nitrogen supply valve. The pipeline connection achieved through the communicating vessel further improves the efficiency of the nitrogen supply valve's response.

[0042] The connection of the first regulating pipe, the second regulating pipe, and the third regulating pipe to the communicating vessel effectively cooperates with the pilot valve core. This not only provides an additional stable pressure source for the lower valve chamber, but also enables further regulation and control of the valve core by adjusting the pressure change of the third regulating pipe when the pilot valve core slides. This amplifies the pressure change in the outlet chamber at the lower valve chamber, thereby improving the efficiency and accuracy of the nitrogen supply valve's response to the outlet chamber pressure. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0045] Figure 2 This is a partial schematic diagram of communicating vessels;

[0046] Figure 3 This is a schematic diagram showing the position of the conductor core when the second through hole is just closed;

[0047] Figure 4 This is a schematic diagram showing the position of the conductor core when the first through hole is closed.

[0048] In the diagram, 1. Valve body; 11. Inlet chamber; 111. Pressure inlet pipe; 1111. Pressure reducing valve; 112. First regulating pipe; 12. Outlet chamber; 121. Pressure replenishing pipe; 122. Active pipe; 13. Valve orifice; 2. Main valve chamber; 21. First diaphragm plate; 211. Concave shell; 212. Compression spring; 22. Upper valve chamber; 23. Lower valve chamber; 3. Valve core; 4. Communicating device; 41. First chamber; 411. First through hole; 42. Second... 43. Third chamber; 431. Second through hole; 44. Fourth chamber; 45. Second regulating pipe; 46. Third regulating pipe; 5. Commander chamber; 51. Second diaphragm plate; 511. Rib shell; 52. Upper chamber; 53. Lower chamber; 6. Pressure regulating pipe; 61. Distribution valve; 7. Stabilizing cylinder; 71. Stabilizing spring; 8. Commander core; 81. First plug; 82. Gradient type; 821. Second plug; 822. Compression spring. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0050] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The following is in conjunction with the appendix Figure 1-4 To further illustrate this application, an embodiment of this application discloses a nitrogen supply valve.

[0053] This application discloses a nitrogen supply valve.

[0054] refer to Figure 1 The nitrogen supply valve includes a valve body 1, a main valve chamber 2, a valve core 3, a communicating vessel 4, a pilot chamber 5, a pilot core 8, and a stabilizing cylinder 7.

[0055] The valve body 1 includes an inlet chamber 11 and an outlet chamber 12. The bottom of the inlet chamber 11 has a valve hole 13 communicating with the outlet chamber 12. The main valve chamber 2 is mounted above the valve body 1. The main valve chamber 2 is formed by two interlocking shells, with a first diaphragm plate 21 pressed and fixed at the connection point. The first diaphragm plate 21 divides the main valve chamber 2 into an upper valve chamber 22 and a lower valve chamber 23. A recessed shell 211 is installed on the upper surface of the first diaphragm plate 21. The valve core 3 is installed on the first diaphragm plate 21 by a nut, and the recessed shell 211 is fastened to the first diaphragm plate 21. The bottom of the valve core 3 passes through the main valve chamber 2 and the valve body 1 and is located within the inlet chamber 11. A protrusion with rubber material at the bottom seals the top of the valve hole 13. Multiple compression springs 212 are fixed to the top wall of the upper valve chamber 22, with the bottom ends of the compression springs 212 abutting against the recessed shell 211. When the pressure in the upper valve chamber 22 and the lower valve chamber 23 is equal, the compression spring 212 causes the valve core 3 to be in the position that closes the valve hole 13.

[0056] The communicating vessel 4 is fixed to the top of the main valve chamber 2, and the pilot chamber 5 is installed on top of the communicating vessel 4. The pilot chamber 5 is formed by two shells that are interlocked and fixed together. A second diaphragm plate 51 is pressed and fixed at the connection point, dividing the pilot chamber 5 into an upper chamber 52 and a lower chamber 53. A reinforcing shell 511 is installed at the bottom of the second diaphragm plate 51. The pilot core 8 is fixed to the second diaphragm plate 51 by a nut, and the reinforcing shell 511 is also fastened to the second diaphragm plate 51. The bottom of the pilot core 8 extends into the communicating vessel 4. A stabilizing cylinder 7 is installed at the top of the pilot chamber 5, and the top of the pilot core 8 is located inside the stabilizing cylinder 7. A stabilizing spring 71 is fixed to the bottom wall of the stabilizing cylinder 7. The top of the stabilizing spring 71 abuts against the top part of the pilot core 8 to adjust the pressure of the pilot core 8 and improve the stability of the pilot core 8's movement. The first diaphragm plate 21 and the second diaphragm plate 51 are both made of airtight and elastic materials. In this embodiment, they are made of rubber, specifically fluororubber.

[0057] The intake chamber 11 is connected to a pressure inlet pipe 111, the other end of which is connected to a communicating vessel 4. The exhaust chamber 12 is connected to a pressure replenishing pipe 121, the other end of which is connected to the upper valve chamber 22. The exhaust chamber 12 is also connected to an active pipe 122, the other end of which is connected to the upper chamber 52. The communicating vessel 4 is also connected to a pressure regulating pipe 6, the other end of which is connected to the lower valve chamber 23. A distribution valve 61 is also installed on the pressure regulating pipe 6, which is connected to the upper valve chamber 22. The distribution valve 61 can adjust the gas flow rate supplied to the upper valve chamber 22 by a knob. The intake chamber 11 is also connected to a first regulating pipe 112, the other end of which is connected to the lower chamber 53. Both the first regulating pipe 112 and the pressure inlet pipe 111 are equipped with pressure reducing valves 1111 to adjust the gas flow rate. The lower chamber 53 is also connected to a second regulating pipe 45, the other end of which is connected to the communicating vessel 4. The communicating gas is also connected to a third regulating pipe 46, the other end of which is connected to the lower valve chamber 23. The communicating vessel 4 provides space for the pressure inlet pipe 111 to connect to the pressure regulating pipe 6, and for the second regulating pipe 45 to connect to the third regulating pipe 46, and controls the gas flow rate by sliding the controller core 8.

[0058] The intake chamber 11 provides a stable air pressure to the lower chamber 53 through the first regulating pipe 112, while the upper chamber 52 maintains the same air pressure as the outlet chamber 12 under the action of the active pipe 122. The pressure of the upper chamber 52 can be regulated by the pressure reducing valve 1111 of the first regulating pipe 112, thereby regulating the air pressure value of the outlet chamber 12 when the first diaphragm 21 is in equilibrium. The outlet chamber 12 provides a stable air pressure to the upper valve chamber 22 through the pressure replenishment pipe 121. The air pressure of the upper valve chamber 22 is also provided by the intake chamber 11 through the pressure inlet pipe 111, the pressure regulating pipe 6, and the distributor. The air pressure of the lower valve chamber 23 is provided by the intake chamber 11 through the pressure inlet pipe 111 and the pressure regulating pipe 6, with a portion being diverted by the distributor; on the other hand, it is provided by the lower chamber 53 through the second regulating pipe 45 and the third regulating pipe 46. The air pressure flowing into the upper valve chamber 22 and the lower valve chamber 23 is mostly controlled by the pilot valve core 3 inside the communicating vessel 4.

[0059] When the pressure in the outlet chamber 12 is less than the pressure in the lower chamber 53, the second diaphragm 51 moves the pilot valve core 3 upward. At this time, although the pressure in the upper valve chamber 22 also decreases, the pilot core 8 moves upward from a state of closing the pressure regulating pipe 6 and the third regulating pipe 46. The pressure in the lower valve chamber 23 remains unchanged, while the pressure in the upper valve chamber 22 gradually decreases. The pressure in the valve core 3 decreases, but the change is not significant. During the upward movement of the pilot core 8, both the regulating pipe and the third regulating pipe 46 open, causing the pressure in both the lower valve chamber 23 and the upper valve chamber 22 to increase. However, since the lower valve chamber 23 has two pressure sources from the inlet chamber 11, the increase rate is higher, and the pressure in the lower valve chamber 23 is greater than that in the upper valve chamber 22. This causes the first diaphragm 21 to move upward, which in turn causes the valve core 3 to move upward, opening the valve orifice 13 and supplying gas to the outlet chamber 12, thus realizing the automatic gas supply of the nitrogen supply valve.

[0060] During the gas supply process, the pressure in the outlet chamber 12 gradually increases, the pressure in the upper chamber 52 gradually increases, and the pressure in the upper valve chamber 22 also increases, but the increase is not significant, only causing the valve core 3 to move slightly downward. The second diaphragm 51 gradually causes the pilot core 8 to move downward. After sealing the third regulating pipe 46 and the pressure regulating pipe 6, the lower valve chamber 23 loses its pressure source, and the pressure decreases, which in turn significantly causes the first diaphragm 21 to move downward, causing the valve core 3 to move downward and block the valve orifice 13. The greater the pressure in the outlet chamber 12, the tighter the seal of the valve core 3.

[0061] The adaptive opening and closing regulation of the nitrogen supply valve is realized through the connection relationship between the communicating vessel 4 and the pipeline. The setting of the regulating pipe not only realizes the amplification feedback of the movement of the pilot core 8 on the valve core 3, but also further improves the amplification feedback of the movement of the pilot core 8 on the movement of the valve core 3 through the setting of the first regulating pipe 112, the second regulating pipe 45 and the third regulating pipe 46, thereby improving the reaction efficiency of the nitrogen supply valve.

[0062] refer to Figure 1 and Figure 2The communicating vessel 4 contains, from top to bottom, a first chamber 41, a second chamber 42, a third chamber 43, and a fourth chamber 44. The first chamber 41 has a first through hole 411 at the bottom center, communicating with the second chamber 42; the third chamber 43 has a second through hole 431 at the bottom center, communicating with the fourth chamber 44. The first chamber 41 is connected to the pressure regulating pipe 6, and the second chamber 42 is connected to the pressure inlet pipe 111. The second regulating pipe 45 is connected to the third chamber 43, and the third regulating pipe 46 is connected to the fourth regulating pipe. The controller core 8 is inserted into the controller and simultaneously located within the first chamber 41, the second chamber 42, and the third chamber 43. The controller core 8 passes through the first through hole 411 and the second through hole 431, and is fixed with a first plug 81, which closes the first through hole 411. A tapered section 82 is slidably connected to the bottom of the controller core 8, and a compression spring 822 is fixedly mounted on the top of the tapered section 82, with the top of the spring 822 fixedly connected to the controller core 8. The diameter of the tapered section 82 gradually increases from bottom to top, and a second plug 821 is fixedly mounted on the top of the tapered section 82. The tapered section 82 is located within the second through hole 431, and the second plug 821 can close the second through hole 431.

[0063] Combination Figure 3 and Figure 4 When the second through hole 431 is closed by the second plug 821, the first plug 81 has not yet moved to the position that closes the first through hole 411. When the first through hole 411 is closed by the first plug 81, the compression spring 822 is in a compressed state.

[0064] During the downward movement of the valve core 8, the flow rate of the pressure inlet pipe 111 and the regulating pipe remains unchanged. Due to the variable diameter setting of the gradient shape 82, the gas flow rate of the second regulating pipe 45 and the third regulating pipe 46 gradually decreases, thereby providing greater feedback to the valve core 3 and significantly reducing the pressure in the lower valve chamber 23. This results in the valve core 3 moving downward earlier and more noticeably. The setting of the gradient shape 82, in conjunction with the compression spring 822, allows the valve core 8 to continue moving downward even after the third regulating pipe 46 is closed. The pressure supply to the lower valve chamber 23 is now provided by the regulating pipe. After the lower valve chamber 23 loses its pressure source after the first through hole 411 is closed, this causes the valve core 3 to continue moving downward with a greater amplitude or being pressed downward with greater force.

[0065] During the upward movement of the pilot valve core 8, the first through-hole 411 opens first, providing pressure to the lower valve chamber 23. Since the regulating pipe also provides pressure to the upper valve chamber 22, the movement of the valve core 3 is not obvious at this time, and it is a small-amplitude adjustment. After the second through-hole 431 opens, the lower valve chamber 23 receives pressure from the third regulating pipe 46, and the pressure in the lower valve chamber 23 gradually increases, thereby driving the valve core 3 to gradually move upward, opening the valve orifice 13, and realizing stable pressure replenishment and nitrogen supply to the outlet chamber 12. This makes the upward movement of the valve core 3 slow at first and then fast during the nitrogen replenishment process, thereby reducing the probability of frequent movement of the valve core 3 due to unstable pressure changes in the outlet chamber 12. Through this design of the communicating vessel 4 and the pilot valve core 8, an additional pressure feedback unit is provided for the valve core 3, improving the efficiency and accuracy of the nitrogen supply valve's response to downstream pressure.

[0066] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A nitrogen supply valve, characterized in that: The system includes a valve body (1), which includes an inlet chamber (11) and an outlet chamber (12). The bottom of the inlet chamber (11) is provided with a valve hole (13) that communicates with the outlet chamber (12); a main valve chamber (2), which is mounted above the valve body (1) and has a first diaphragm plate (21) inside, which divides the main valve chamber (2) into an upper valve chamber (22) and a lower valve chamber (23); a valve core (3), which is mounted on the first diaphragm plate (21) and has its bottom end located inside the inlet chamber (11) for sealing the valve hole (13); a communicating vessel (4), which is fixed on the top of the main valve chamber (2); a controller chamber (5), which is mounted on the top of the communicating vessel (4) and has a second diaphragm plate (51) inside, which divides the controller chamber (5) into an upper chamber (52) and a lower chamber (53); and a controller core (8), which is mounted on the second diaphragm plate (51) and has its bottom end located inside the communicating vessel (4). The pressure inlet pipe (111) is connected to the air inlet chamber (11) at one end and to the communication device (4) at the other end, with a pressure reducing valve (1111) installed in the middle; the pressure replenishing pipe (121) is connected to the air outlet chamber (12) at one end and to the upper valve chamber (22) at the other end; the active pipe (122) is connected to the air outlet chamber (12) at one end and to the upper chamber (52) at the other end; the pressure regulating pipe (6) is connected to the communication device (4) at one end and to the lower valve chamber (23) at the other end, and is also connected to a distribution valve (61), which is connected to the upper valve chamber (22) through the distribution valve (61); the pressure inlet pipe (111) and the pressure replenishing pipe (121) are connected in the communication device (4), and the gas flow rate is controlled by the sliding of the controller core (8); The communicating vessel (4) has a first chamber (41) and a second chamber (42). The first chamber (41) is connected to the pressure regulating pipe (6), and the second chamber (42) is connected to the pressure inlet pipe (111). The first chamber (41) has a first through hole (411) that is connected to the second chamber (42). The controller core (8) is fixed with a first plug (81). When the controller core (8) moves down, it can block the first through hole (411) through the first plug (81).

2. A nitrogen supply valve according to claim 1, characterized in that: A compression spring (212) is fixedly installed on the top wall of the upper valve chamber (22). The bottom end of the compression spring (212) abuts against the first diaphragm plate (21). When the pressure in the upper valve chamber (22) and the lower valve chamber (23) is equal, the compression spring (212) makes the valve core (3) in a position that closes the valve hole (13).

3. A nitrogen supply valve according to claim 2, characterized in that: A stabilizing cylinder (7) is installed on the top of the controller chamber (5). The top of the controller core (8) is located inside the stabilizing cylinder (7). A stabilizing spring (71) is fixed on the bottom wall of the stabilizing cylinder (7). The top of the stabilizing spring (71) is pressed against the top part of the controller core (8).

4. A nitrogen supply valve according to claim 1, characterized in that: The intake chamber (11) is connected to the first regulating pipe (112), and the other end of the first regulating pipe (112) is connected to the lower chamber (53). The first regulating pipe (112) is also equipped with a pressure reducing valve (1111).

5. A nitrogen supply valve according to claim 4, characterized in that: The communicating vessel (4) is also provided with a third chamber (43) and a fourth chamber (44). The third chamber (43) is provided with a second through hole (431) that communicates with the fourth chamber (44). The controller core (8) is fixed with a second plug (821). When the controller core (8) moves down, it can block the second through hole (431) through the second plug (821). The lower chamber (53) is connected to a second regulating pipe (45), and the other end of the second regulating pipe (45) is connected to the third chamber (43). The lower valve chamber (23) is connected to a third regulating pipe (46), and the other end of the third regulating pipe (46) is connected to the fourth chamber (44).

6. A nitrogen supply valve according to claim 5, characterized in that: The bottom part of the controller core (8) located in the second through hole (431) is a gradient part (82), the diameter of the gradient part (82) gradually increases from bottom to top, and the second plug (821) is fixed on the top of the gradient part (82).

7. A nitrogen supply valve according to claim 6, characterized in that: The gradient shape (82) is slidably connected to the bottom of the controller core (8). A compression spring (822) is provided on the top of the gradient shape (82). The top of the compression spring (822) is fixedly connected to the controller core (8). After the second plug (821) closes the second through hole (431), the second through hole (431) can still remain open.

8. A nitrogen supply valve according to claim 1, characterized in that: The second diaphragm plate (51) is fitted with a stiffener shell (511), which is fastened to the second diaphragm plate (51) by a nut on the controller core (8).

9. A nitrogen supply valve according to claim 1, characterized in that: A concave shell (211) is installed on the first diaphragm plate (21). The concave shell (211) is fastened to the first diaphragm plate (21) by a nut on the valve core (3). The compression spring (212) abuts against the inner wall of the concave shell (211).

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