Nitrogen supply valve

Abstract

The invention discloses a nitrogen supply valve, and relates to the technical field of nitrogen supply systems, the nitrogen supply valve comprises a valve body, the valve body comprises a gas inlet cavity and a gas outlet cavity, and a valve hole is formed in the bottom of the gas inlet cavity; the main valve chamber is erected above the valve body, and a first diaphragm plate is arranged in the main valve chamber; the valve core is used for blocking the valve hole; the communicating vessel is fixedly arranged at the top of the main valve chamber; the director chamber is mounted at the top of the communicating vessel, and a second diaphragm plate is arranged in the director chamber; the director core is mounted on the second diaphragm plate, and the bottom end of the director core is positioned in the communicating vessel; one end of the pressure inlet pipe is communicated with the air inlet cavity, and the other end is communicated with the communicating vessel; one end of the pressure supplementing pipe communicates with the air outlet cavity, and the other end communicates with the upper valve cavity; one end of the driving pipe communicates with the air outlet cavity, and the other end communicates with the upper chamber cavity; one end of the pressure regulating pipe is communicated with the communicating vessel, the other end of the pressure regulating pipe is communicated with the lower valve cavity, and the pressure regulating pipe is connected with a distribution valve and communicated with the upper valve cavity through the distribution valve. The nitrogen supply valve has the effect of improving the efficiency and precision of the response of the nitrogen supply valve to the 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 to solve 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: A nitrogen supply valve, including 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; 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. 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. The communicating vessel is fixed at the top of the main valve chamber; 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. The conductor core is mounted on the second diaphragm plate, with its bottom end located inside the communicating vessel; 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. The pressure-reducing pipe is connected at one end to the air outlet chamber and at the other end to the upper valve chamber. The active tube is connected at one end to the outlet chamber and at the other end to the upper chamber. The pressure regulating pipe is communicated with the communicating device at one end and communicated with the lower valve cavity at the other end, and is further connected with a distribution valve communicated with the upper valve cavity through the distribution valve. The inlet pressure pipe and the pressure supplement pipe are communicated in the communicating device, and the gas flow is controlled by the sliding of the director core.

[0006] By adopting the above technical scheme, when the pressure of the outlet cavity is small, the pressure of the upper chamber cavity is reduced, and then the second diaphragm plate is moved upward due to the pressure, and the director core is moved upward, and then the pressure of the inlet pressure pipe can enter the pressure regulating pipe through the communicating device, and is transported into the upper valve cavity and the lower valve cavity at different proportions through the distribution valve. Due to the reduction of the outlet cavity pressure, the pressure of the upper valve cavity is also reduced, and the pressure of the lower valve cavity is given by the pressure regulating pipe, so that the pressure of the lower valve cavity is greater than that of the upper valve cavity, and the first diaphragm plate is moved upward, and then the valve core is moved upward, and the valve hole is opened to supplement nitrogen.

[0007] When the pressure of the outlet cavity is large, the pressure of the upper chamber cavity is increased, and the second diaphragm plate is moved downward, and then the director core is moved downward, and when the director core blocks the inlet pressure pipe and the pressure supplement pipe, the pressure of the lower valve cavity is reduced, and the pressure of the upper valve cavity is increased under the action of the pressure supplement pipe, and then the first diaphragm plate is moved downward, and the valve core is moved downward, and the valve hole is closed, and the larger the pressure of the outlet cavity is, the more tightly the valve core is blocked. In this way, the amplification effect of the director action is improved, and then the response speed and accuracy of the nitrogen supply valve are improved.

[0008] Optionally, a compression spring is fixedly arranged on the top wall in the upper valve cavity, and the bottom end of the compression spring abuts against the first diaphragm plate, and when the pressures of the upper valve cavity and the lower valve cavity are equal, the compression spring makes the valve core be in the position of closing the valve hole.

[0009] By adopting the above technical scheme, the setting of the compression spring can effectively improve the stability of the position of the valve core, and also achieve the range limitation of the displacement of the valve core, and further improve the service life of the first diaphragm plate.

[0010] Optionally, a stabilizing cylinder is installed on the top of the director chamber, the top of the director core is located in the stabilizing cylinder, and a stabilizing spring is fixedly arranged on the bottom wall in the stabilizing cylinder, and the top end of the stabilizing spring abuts against the top of the director core.

[0011] By adopting the above technical scheme, the setting of the stabilizing cylinder cooperates with the stabilizing spring to effectively improve the stability of the initial position of the director core, realize the pressure regulation of the second diaphragm plate, and also improve the service life of the second diaphragm plate.

[0012] Optionally, a first cavity and a second cavity are arranged in the communicating device, the first cavity is communicated with the pressure regulating pipe, the second cavity is communicated with the inlet pressure pipe, the first cavity is provided with a first through hole communicated with the second cavity, the director core is fixedly provided with a first plug, and the downward movement of the director core can block the first through hole through the first plug.

[0013] By adopting the technical scheme, the communication between the inlet pressure pipe and the pressure regulating pipe in the communication device is realized, and the switching of the plugging and communication of the plugging control pressure regulating pipe and the inlet pressure pipe by the commander core is also realized.

[0014] Optionally, the first regulating pipe is in communication with the inlet cavity, and the other end of the first regulating pipe is in communication with the lower chamber cavity.

[0015] By adopting the technical scheme, the pressure of the inlet cavity is reduced by the first regulating pipe and then provided to the lower chamber cavity, so that the adjustment of the moving range of the commander core and the adjustment of the opening pressure of the valve core are realized.

[0016] Optionally, the communication device further has a third cavity and a fourth cavity, the third cavity is provided with a second through hole in communication with the fourth cavity, the commander core is fixedly provided with a second plug, and the commander core can plug the second through hole through the second plug when moving downward. The second regulating pipe is in communication with the lower chamber cavity, and the other end of the second regulating pipe is in communication with the third cavity. The third regulating pipe is in communication with the lower valve cavity, and the other end of the third regulating pipe is in communication with the fourth cavity.

[0017] By adopting the technical scheme, the second regulating pipe transmits the gas in the lower valve chamber to the lower valve cavity through the communication device, and provides pressure to the lower valve cavity together with the pressure regulating pipe. Since the pressure of the lower chamber cavity is constant, if the pressure of the outlet cavity increases, the pressure of the upper chamber cavity will also gradually increase, driving the commander core to move downward, and then the second through hole and the first through hole are plugged, the pressure supply to the lower valve cavity is stopped, the pressure compensation pipe still compensates the pressure of the lower valve cavity, and then the valve core moves downward. Since the lower valve cavity stops two pressure supply sources, the pressure difference increases, the valve core moves faster, and the plugging effect is better.

[0018] Optionally, the part of the commander core at the bottom located in the second through hole is a gradual change body, the diameter of the gradual change body gradually increases from bottom to top, and the second plug is fixedly arranged at the top of the gradual change body.

[0019] By adopting the technical scheme, the gradual change body can gradually reduce the pressure provided by the third regulating pipe to the lower valve cavity during the downward movement of the commander core, so that the pre-adjustment of the valve core movement is realized, and the response efficiency and accuracy of the nitrogen supply valve can be further improved compared with the traditional setting.

[0020] Optionally, the gradual change body is in sliding connection with the bottom of the commander core, the top of the gradual change body is provided with a compression spring, the top end of the compression spring is fixedly connected with the commander core, and the second through hole can still be kept in an open state after the second plug plugs the second through hole.

[0021] By adopting the technical scheme, the sliding of the gradual change body and the compression spring setting can realize that the gradual change body is closed by the second plug to make the commander core continue to move downward, then the first through hole is closed by the first plug, the step response speed of the valve core and the outlet cavity pressure is realized, the displacement of the valve core and the pressure adjustment are further adjusted in the process of the commander core moving after the second through hole is closed by the second plug, and the response efficiency and the accuracy of the nitrogen supply valve are improved.

[0022] Optionally, the second diaphragm plate is provided with a rib shell, and the rib shell is fastened to the second diaphragm plate by a nut on the commander core.

[0023] By adopting the technical scheme, the rib shell can effectively protect the second diaphragm plate, so that the second diaphragm plate cannot move downward locally, and the response accuracy of the commander valve is improved.

[0024] Optionally, the first diaphragm plate is provided with a concave shell, the concave shell is fastened to the first diaphragm plate by a nut on the valve core, and the compression spring is tightly arranged on the inner wall of the concave shell.

[0025] By adopting the technical scheme, 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 integrally in a large area, and improve the response accuracy of the valve core.

[0026] In summary, the present application has at least one of the following beneficial technical effects: After the outlet cavity pressure decreases, the upper chamber cavity pressure decreases, the second diaphragm plate drives the commander core to move upward, the first through hole is opened, the inlet pressure pipe and the pressure regulating pipe are communicated, the lower valve cavity is provided with pressure again, the first diaphragm plate drives the valve core to move upward, the inlet cavity and the outlet cavity are communicated to supply gas, the outlet cavity pressure increases, the second diaphragm plate drives the commander core to move downward to reset, the upper valve cavity pressure also increases, the valve core moves downward, the pressure supply to the pressure regulating pipe is stopped after the commander core moves downward to close the first through hole, the lower valve cavity pressure decreases, the valve core is pressed downward, the valve hole is closed, the self-response adjustment of the nitrogen supply valve is realized, and the pipeline communication is realized through the communicating device to improve the response efficiency of the nitrogen supply valve. The connection of the first adjusting pipe, the communication relationship between the second adjusting pipe and the third adjusting pipe and the communicating device effectively cooperate with the commander core, not only provide a stable pressure source for the lower valve cavity, but also realize further adjustment and control of the valve core through the change of the pressure supply pressure of the third adjusting pipe when the commander core slides, realize the amplification of the change of the outlet cavity pressure in the lower valve cavity, and improve the efficiency and accuracy of the response of the nitrogen supply valve to the outlet cavity pressure. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and do not illustrate all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0028] Figure 1 is a structural schematic diagram of the embodiment of the present application; Figure 2 is a partial schematic diagram of the communication device; Figure 3 is a schematic diagram of the position of the pilot core showing that the second through hole is just in the closed state; Figure 4 is a schematic diagram of the position of the pilot core showing that the first through hole is in the closed state.

[0029] In the figure, 1, valve body; 11, air inlet cavity; 111, pressure inlet pipe; 1111, pressure reducing valve; 112, first adjusting pipe; 12, air outlet cavity; 121, pressure supplement pipe; 122, main pipe; 13, valve hole; 2, main valve chamber; 21, first diaphragm; 211, concave shell; 212, compression spring; 22, upper valve cavity; 23, lower valve cavity; 3, valve core; 4, communication device; 41, first chamber; 411, first through hole; 42, second chamber; 43, third chamber; 431, second through hole; 44, fourth chamber; 45, second adjusting pipe; 46, third adjusting pipe; 5, pilot chamber; 51, second diaphragm; 511, rib shell; 52, upper chamber cavity; 53, lower chamber cavity; 6, pressure regulating pipe; 61, distribution valve; 7, stabilizing cylinder; 71, stabilizing spring; 8, pilot core; 81, first plug; 82, gradual change body; 821, second plug; 822, compression spring. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described in detail. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The following will be described in detail with reference to the accompanying drawings Figures 1-4 Further detailed description of the present application, the present application embodiment discloses a kind of nitrogen supply valve.

[0034] The present application embodiment discloses a kind of nitrogen supply valve.

[0035] Reference Figure 1 The nitrogen supply valve includes a valve body 1, a main valve chamber 2, a valve core 3, a communication device 4, a commander chamber 5, a commander core 8 and a stabilizing cylinder 7.

[0036] The valve body 1 includes an air inlet cavity 11 and an air outlet cavity 12, and the air inlet cavity 11 is provided with a valve hole 13 communicated with the air outlet cavity 12 at the bottom. The main valve chamber 2 is arranged above the valve body 1, and the main valve chamber 2 is formed by two part shells being buckled and fixed to each other, and a first diaphragm 21 is fixedly connected at the joint. The first diaphragm 21 divides the main valve chamber 2 into an upper valve cavity 22 and a lower valve cavity 23. A concave shell 211 is mounted on the upper surface of the first diaphragm 21, and the valve core 3 is mounted on the first diaphragm 21 through a nut, and the concave shell 211 is fastened to the first diaphragm 21. The valve core 3 penetrates the main valve chamber 2 and the valve body 1 at the bottom and is located in the air inlet cavity 11, and the top of the valve hole 13 is blocked by a convex part with rubber material at the bottom. A plurality of compression springs 212 are fixedly arranged on the inner top wall of the upper valve cavity 22, and the bottom end of the compression spring 212 abuts against the concave shell 211. When the pressure of the upper valve cavity 22 and the lower valve cavity 23 is equal, the compression spring 212 makes the valve core 3 in the position of closing the valve hole 13.

[0037] The communicating device 4 is fixed on the top of the main valve chamber 2, and the commander chamber 5 is installed on the top of the communicating device 4. The commander chamber 5 is formed by two parts of shell fixed by buckling, and the second diaphragm 51 is fixed by pressing on the connection. The second diaphragm 51 divides the commander chamber 5 into the upper chamber 52 and the lower chamber 53. The rib shell 511 is installed on the bottom of the second diaphragm 51, the commander core 8 is fixed on the second diaphragm 51 by the nut, and the rib shell 511 is fastened on the second diaphragm 51. The bottom of the commander core 8 extends into the communicating device 4. The stabilizing cylinder 7 is installed on the top of the commander chamber 5, and the top of the commander core 8 is located in the stabilizing cylinder 7. The stabilizing spring 71 is fixed on the inner bottom wall of the stabilizing cylinder 7, and the top end of the stabilizing spring 71 abuts against the top of the commander core 8, which is used to adjust the pressure of the movement of the commander core 8 and improve the stability of the movement of the commander core 8. The first diaphragm 21 and the second diaphragm 51 are both made of air-tight and elastic material, which is rubber material in this embodiment, specifically fluorine rubber material.

[0038] The inlet cavity 11 is communicated with the inlet pipe 111, and the other end of the inlet pipe 111 is communicated with the communicating device 4. The outlet cavity 12 is communicated with the supplement pipe 121, and the other end of the supplement pipe 121 is communicated with the upper valve chamber 22. The outlet cavity 12 is also communicated with the active pipe 122, and the other end of the active pipe 122 is communicated with the upper chamber 52. The communicating device 4 is also connected with the pressure regulating pipe 6, and the other end of the pressure regulating pipe 6 is communicated with the lower valve chamber 23. The pressure regulating pipe 6 is also installed with the distribution valve 61, which is communicated with the upper valve chamber 22, and the distribution valve 61 can adjust the gas flow provided to the upper valve chamber 22 by the knob. The inlet cavity 11 is also communicated with the first adjusting pipe 112, and the other end of the first adjusting pipe 112 is communicated with the lower chamber 53. The first adjusting pipe 112 and the inlet pipe 111 are both installed with the pressure reducing valve 1111, which is used to adjust the gas flow. The lower chamber 53 is also connected with the second adjusting pipe 45, and the other end of the second adjusting pipe 45 is communicated with the communicating device 4. The communicating device 4 is also connected with the third adjusting pipe 46, and the other end of the third adjusting pipe 46 is communicated with the lower valve chamber 23. The communicating device 4 is used to provide space, so that the inlet pipe 111 is communicated with the pressure regulating pipe 6, the second adjusting pipe 45 is communicated with the third adjusting pipe 46, and the gas communication amount is controlled by the sliding of the commander core 8.

[0039] The inlet cavity 11 provides stable air pressure for the lower chamber cavity 53 through the first regulating pipe 112, and the upper chamber cavity 52 maintains the same air pressure as the outlet cavity 12 under the action of the main pipe 122. The pressure of the upper chamber cavity 52 can be adjusted by the pressure reducing valve 1111 of the first regulating pipe 112, thereby adjusting the air pressure value of the outlet cavity 12 when the first diaphragm 21 is in the balanced state. The outlet cavity 12 stably provides air pressure for the upper valve cavity 22 through the pressure supplement pipe 121, and the air pressure of the upper valve cavity 22 is also provided by the inlet cavity 11 through the inlet pressure pipe 111, the pressure regulating pipe 6 and the distributor. The air pressure of the lower valve cavity 23 is provided by the inlet cavity 11 through the inlet pressure pipe 111 and the pressure regulating pipe 6 on the one hand, and by the lower chamber cavity 53 through the second regulating pipe 45 and the third regulating pipe 46 on the other hand. A part of the air pressure is taken away by the distributor. The air pressure flowing to the upper valve cavity 22 and the lower valve cavity 23 is mostly controlled by the commander valve core 3 in the communicating vessel 4.

[0040] When the pressure of the outlet cavity 12 is less than the pressure of the lower chamber cavity 53, the second diaphragm 51 drives the commander valve core 3 to move upwards. At this time, although the pressure of the upper valve cavity 22 also decreases, the commander core 8 moves upwards from the state of closing the pressure regulating pipe 6 and the third regulating pipe 46. The pressure of the lower valve cavity 23 does not change, and the pressure of the upper valve cavity 22 gradually decreases. The pressure of the lower valve cavity 23 increases faster than the upper valve cavity 22 because it has two air pressure sources from the inlet cavity 11. The pressure of the lower valve cavity 23 is greater than that of the upper valve cavity 22, which drives the first diaphragm 21 to move upwards, thereby driving the valve core 3 to move upwards and opening the valve hole 13 to supply air to the outlet cavity 12, thereby realizing automatic air supply of the nitrogen supply valve.

[0041] During the air supply process, the pressure of the outlet cavity 12 gradually increases, the pressure of the upper chamber cavity 52 gradually increases, and the pressure of the upper valve cavity 22 also increases, but the amplitude is not obvious, only driving the valve core 3 to move slightly downwards. The second diaphragm 51 gradually drives the commander core 8 to move downwards. After closing the third regulating pipe 46 and the pressure regulating pipe 6, the lower valve cavity 23 loses the pressure source and the pressure decreases, thereby obviously driving the first diaphragm 21 to move downwards, so that the valve core 3 moves downwards to block the valve hole 13. The greater the pressure of the outlet cavity 12, the more tightly the valve core 3 blocks.

[0042] The self-adaptive opening and closing adjustment of the nitrogen supply valve is realized through the connection relationship of the communicating vessel 4 and the pipeline. The setting of the regulating pipe not only realizes the amplification feedback of the movement of the commander core 8 on the valve core 3, but also further improves the amplification feedback of the movement of the commander core 8 on 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.

[0043] Reference Figure 1 and Figure 2The first chamber 41, the second chamber 42, the third chamber 43 and the fourth chamber 44 are sequentially arranged in the communicating device 4 from top to bottom. The first chamber 41 is provided with a first through hole 411 in the middle of the bottom, which is in communication with the second chamber 42. The third chamber 43 is provided with a second through hole 431 in the middle of the bottom, which is in communication with the fourth chamber 44. The first chamber 41 is in communication with the pressure regulating pipe 6, and the second chamber 42 is in communication with the pressure inlet pipe 111. The second regulating pipe 45 is in communication with the third chamber 43, and the third regulating pipe 46 is in communication with the fourth regulating pipe. The commander core 8 is inserted into the commander and simultaneously located in the first chamber 41, the second chamber 42 and the third chamber 43. The commander core 8 passes through the first through hole 411 and the second through hole 431, and the commander core 8 is fixedly provided with a first plug 81, which can close the first through hole 411. The bottom of the commander core 8 is slidably connected with a gradual change body 82, the top of the gradual change body 82 is fixedly provided with a compression spring 822, and the top end of the compression spring 822 is fixedly connected with the commander core 8. The diameter of the gradual change body 82 gradually increases from bottom to top, and the top of the gradual change body 82 is fixedly provided with a second plug 821. The gradual change body 82 is located in the second through hole 431, and the second plug 821 can close the second through hole 431.

[0044] In 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 moved to the position of closing 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.

[0045] During the downward movement of the commander core 8, the flow capacity of the pressure inlet pipe 111 and the regulating pipes remains unchanged. Due to the variable-diameter arrangement of the gradual change body 82, the gas flow capacity of the second regulating pipe 45 and the third regulating pipe 46 gradually decreases, thereby bringing greater feedback to the valve core 3, so that the pressure of the lower valve chamber 23 is significantly reduced, thereby making the valve core 3 move downward more in advance and more obviously. The arrangement of the gradual change body 82 cooperates with the compression spring 822, so that the commander core 8 can continue to move downward after the third regulating pipe 46 is closed. The pressure supply of the lower valve chamber 23 is provided by the regulating pipe, and the lower valve chamber 23 loses the pressure source after the first through hole 411 is closed, thereby making the valve core 3 continue to move downward or press downward with greater force.

[0046] During the process of the commander core 8 moving up, the first through hole 411 opens first, providing pressure for the lower valve cavity 23, and because the adjusting pipe also provides pressure for the upper valve cavity 22, at this time the action of the valve core 3 is not obvious, and belongs to small-amplitude movement adjustment. After the second through hole 431 opens, the lower valve cavity 23 obtains the pressure supply of the third adjusting pipe 46, the pressure of the lower valve cavity 23 is gradually improved, and then drives the valve core 3 to gradually move up, opens the valve hole 13, realizes stable pressure compensation and nitrogen supply for the outlet cavity 12, so that the upward movement of the valve core 3 during the nitrogen compensation process is slow at first and then fast, and then the probability of frequent movement of the valve core 3 due to unstable pressure change of the outlet cavity 12 is reduced. Through the design of the communicating device 4 and the commander core 8, the valve core 3 is provided with an additional pressure feedback unit, and the efficiency and accuracy of the response of the nitrogen supply valve to the pressure after the valve are improved.

[0047] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A nitrogen supply valve, characterized in that: include The valve body (1) includes an air inlet chamber (11) and an air outlet chamber (12), and the bottom of the air inlet chamber (11) is provided with a valve hole (13) that communicates with the air outlet chamber (12); The main valve chamber (2) is mounted above the valve body (1) and has a first diaphragm plate (21) inside, which divides the main valve chamber (2) into two parts: the upper valve chamber (22) and the lower valve chamber (23). The valve core (3) is installed on the first diaphragm plate (21), with its bottom end located in the air inlet chamber (11), and is used to seal the valve hole (13); The communicating vessel (4) is fixed on the top of the main valve chamber (2); The command chamber (5) is installed on top of the communicating vessel (4) and has a second membrane plate (51) inside, which divides the command chamber (5) into an upper chamber (52) and a lower chamber (53). The controller core (8) is installed on the second diaphragm plate (51), with 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 communicating vessel (4) at the other end, and a pressure reducing valve (1111) is installed in the middle. The pressure-replenishing pipe (121) is connected at one end to the air outlet chamber (12) and at the other end to the upper valve chamber (22); The active tube (122) is connected at one end to the outlet chamber (12) and at the other end to the upper chamber (52); The pressure regulating pipe (6) is connected to the communicating vessel (4) at one end and to the lower valve chamber (23) at the other end. It is also connected to the 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 replenishment pipe (121) are connected in the communicating vessel (4), and the gas flow rate is controlled by the sliding of the controller core (8).

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 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).

5. A nitrogen supply valve according to claim 4, 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).

6. A nitrogen supply valve according to claim 5, 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 tube (45), and the other end of the second regulating tube (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).

7. A nitrogen supply valve according to claim 6, 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).

8. A nitrogen supply valve according to claim 7, 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.

9. 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).

10. 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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