Nitrogen supply valve

Abstract

The utility model relates to a kind of nitrogen supply valves in the technical field of valve body, including valve body, valve core, valve stem and adjusting part, adjusting part is set to the top of valve body, valve stem is set between valve body and adjusting part for driving valve core to move up and down, the inside of adjusting part is equipped with a diaphragm, diaphragm is the sheet structure with elasticity, the middle part of diaphragm is equipped with the extension sleeve nozzle to two end faces, sleeve nozzle is the hollow structure of conical frustum, the top of valve stem penetrates the middle part of sleeve nozzle, and the outside of sleeve nozzle is equipped with fastener, sleeve nozzle is connected on the outside of valve stem by fastener and is locked and fixed, sleeve nozzle can be covered on the surface of valve stem by fastener and is locked and fixed, keep the sealing between valve stem and diaphragm, play the fixed structure of optimization diaphragm, while keeping the sealing between diaphragm and adjusting part.

Description

Technical Field

[0001] This utility model relates to the field of valve body technology, and in particular to a nitrogen supply valve. Background Technology

[0002] A nitrogen supply valve is a valve used to control and seal high-pressure gases. It is mainly used for the management and regulation of high-pressure gases such as nitrogen. The nitrogen supply valve requires no external power source, utilizing the energy of the regulated medium itself. It is a pressure stabilizing device that automatically controls the flow rate of the medium through the valve, maintaining a constant downstream pressure.

[0003] Existing nitrogen supply valves typically consist of a control valve, regulator, pressure spring, and valve stem. They provide self-regulation through a diaphragm within the regulator, allowing for large differential pressure ratios (e.g., 0.8 MPa upstream, 0.001 MPa downstream), making them particularly suitable for low-pressure gas control. The main regulating component is the diaphragm, located inside the regulator and forming two mutually sealed chambers. Currently, there is an urgent need to develop a nitrogen supply valve to improve the sealing effect between the diaphragm and the chambers. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen supply valve to solve the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A nitrogen supply valve includes a valve body, a valve core, a valve stem, and an adjusting component. The adjusting component is disposed above the valve body, and the valve stem is disposed between the valve body and the adjusting component to drive the valve core to move up and down. The adjusting component has a diaphragm inside, which is an elastic sheet structure. The diaphragm has a sleeve extending to both ends in the middle of the diaphragm. The sleeve has a frustoconical hollow structure. The top of the valve stem passes through the middle of the sleeve, and a fastener is provided on the outside of the sleeve. The sleeve is locked and fixed to the outside of the valve stem by the fastener.

[0007] As a further embodiment of the above description, the fastener is composed of a clamp, one end of which is equipped with a rotatable bolt, and the other end of which has a toothed structure. The clamp is a ring structure that fits into the middle of the sleeve, and the two ends of the clamp are tightened in the form of a worm gear.

[0008] As a further embodiment of the above description, the adjusting component includes an upper shell, a lower shell, and a diaphragm, with the diaphragm clamped and fixed between the upper shell and the lower shell.

[0009] As a further embodiment of the above description, the valve body is equipped with a valve core for switching, and the valve stem extends into the valve body and connects with the valve core. A through hole is provided in the middle of the valve body, and the bottom end of the valve core is a truncated cone-shaped wedge. The inner wall of the through hole is an outwardly inclined abutting cone surface. The wedge of the valve core can be embedded in the inner wall of the through hole, and the valve core can adjust the gap width between the abutting cone surface and the wedge through the valve stem.

[0010] As a further embodiment of the above description, the valve body is provided with a first flow channel and a second flow channel at both ends, and the first flow channel and the second flow channel are connected by a through hole to form a conductive structure. Both ends of the valve body are provided with mounting flanges, which are located at the ports of the first flow channel and the second flow channel.

[0011] In the above description, as a further embodiment, the top of the valve stem penetrates through the valve body, the lower shell, and the diaphragm. The top of the valve stem is fixedly connected to the center of the diaphragm. The bottom of the valve stem extends into the interior of the valve body. The top of the valve core is a columnar connecting post with a hole diameter smaller than the through hole. The valve core is fixedly connected to the valve stem through the connecting post.

[0012] As a further embodiment, the top of the adjusting component is provided with an adjusting cylinder, and the inside of the adjusting cylinder is provided with a rotatable adjusting screw. The bottom end of the adjusting screw extends into the interior of the adjusting component, and the adjusting screw is threadedly connected to the adjusting component. The bottom end of the adjusting screw abuts against the top end of the valve stem.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: a sleeve extending to both ends is provided in the middle of the diaphragm, and the valve stem is sleeved through the conical hollow structure of the sleeve and locked and fixed by fasteners on the outside of the valve stem. First, it can reduce the input of conventional gaskets. At the same time, the sleeve can cover the surface of the valve stem and be locked and fixed by fasteners to maintain the sealing between the valve stem and the diaphragm, thereby optimizing the fixing structure of the diaphragm and maintaining the sealing between the diaphragm and the regulating component. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a nitrogen supply valve described in this embodiment;

[0015] Figure 2 This is an exploded view of the structure of the adjusting component described in this embodiment;

[0016] Figure 3 This is a cross-sectional view of a nitrogen supply valve as described in this embodiment;

[0017] Figure 4 for Figure 3 A magnified schematic diagram of the structure of part A in the diagram;

[0018] Figure 5 for Figure 3 A partially enlarged structural diagram of B in the diagram.

[0019] In the diagram: 1-valve body, 11-first flow channel, 12-second flow channel, 13-mounting flange, 14-through hole, 141-abutting conical surface, 2-adjusting component, 21-upper shell, 22-lower shell, 3-adjusting cylinder, 4-adjusting screw, 5-diaphragm, 51-sleeve, 6-valve core, 61-connecting column, 62-wedge, 7-valve stem, 8-clamp. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] For this embodiment, please refer to Figures 1-5 The specific implementation of the nitrogen supply valve includes a valve body 1, a valve core 6, a valve stem 7, and an adjusting component 2. The adjusting component 2 is located above the valve body 1. The valve stem 7 is located between the valve body 1 and the adjusting component 2 to drive the valve core 6 to move up and down. The adjusting component 2 has a diaphragm 5 inside. The diaphragm 5 is an elastic sheet structure. The middle of the diaphragm 5 has a sleeve 51 extending to both ends. The sleeve 51 is a frustum-shaped hollow structure. The top of the valve stem 7 passes through the middle of the sleeve 51, and the outside of the sleeve 51 is provided with a fastener. The sleeve 51 is locked and fixed to the outside of the valve stem 7 by the fastener. The fastener is composed of a clamp 8. One end of the clamp 8 has a rotatable bolt, and the other end of the clamp 8 has a toothed structure. The clamp 8 is ring-shaped and fits into the middle of the sleeve 51. The two ends of the clamp 8 are worm gear-shaped for tightening.

[0022] A sleeve 51 extending to both ends is provided in the middle of the diaphragm 5. The valve stem 7 is sleeved through the frustoconical hollow structure of the sleeve 51 and locked and fixed by fasteners on the outside of the valve stem 7. First, it can reduce the input of conventional gaskets. At the same time, the sleeve 51 can cover the surface of the valve stem 7 and be locked and fixed by fasteners to maintain the sealing between the valve stem 7 and the diaphragm 5, thereby optimizing the fixing structure of the diaphragm 5 and maintaining the sealing between the diaphragm 5 and the regulating component 2.

[0023] Specifically, such as Figure 2 and Figure 3 As shown, the adjusting member 2 includes an upper shell 21, a lower shell 22 and a diaphragm 5, with the diaphragm 5 clamped and fixed between the upper shell 21 and the lower shell 22.

[0024] Specifically, such as Figure 4As shown, the valve body 1 has a valve core 6 for switching inside. The valve stem 7 extends into the valve body 1 and connects with the valve core 6. A through hole 14 is provided in the middle of the valve body 1. The bottom end of the valve core 6 is a truncated cone-shaped wedge 62. The inner wall of the through hole 14 is an outwardly inclined abutment cone surface 141. The wedge 62 of the valve core 6 can be embedded in the inner wall of the through hole 14. The valve core 6 can adjust the gap width between the abutment cone surface 141 and the wedge 62 through the valve stem 7. The valve body 1 has a first flow channel 11 and a second flow channel 12 at both ends. The first flow channel 11 and the second flow channel 12 are connected by the through hole 14. The valve body 1 has a mounting flange 13 at both ends. The mounting flange 13 is located at the port of the first flow channel 11 and the second flow channel 12.

[0025] In a further embodiment, the top end of the valve stem 7 penetrates the valve body 1, the lower shell 22, and the diaphragm 5. The top end of the valve stem 7 is fixedly connected to the center of the diaphragm 5. The bottom end of the valve stem 7 extends into the interior of the valve body 1. The top end of the valve core 6 is a columnar connecting post 61. The diameter of the connecting post 61 is smaller than that of the through hole 14. The valve core 6 is fixedly connected to the valve stem 7 through the connecting post 61. The top end of the adjusting component 2 is also provided with an adjusting cylinder 3. The interior of the adjusting cylinder 3 is provided with a rotatable adjusting screw 4. The bottom end of the adjusting screw 4 extends into the interior of the adjusting component 2, and the adjusting screw 4 is threadedly connected to the adjusting component 2. The bottom end of the adjusting screw 4 abuts against the top end of the valve stem 7.

[0026] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A nitrogen supply valve, comprising a valve body, a valve core, a valve stem, and an adjusting element, wherein the adjusting element is disposed above the valve body, and the valve stem is disposed between the valve body and the adjusting element for driving the valve core to move up and down, characterized in that: The regulating component has a diaphragm inside, which is an elastic sheet structure. The middle of the diaphragm has a sleeve extending to both ends. The sleeve has a frustum-shaped hollow structure. The top of the valve stem passes through the middle of the sleeve, and a fastener is provided on the outside of the sleeve. The sleeve is locked and fixed to the outside of the valve stem by the fastener.

2. A nitrogen supply valve according to claim 1, characterized in that: The fastener consists of a clamp, one end of which has a rotatable bolt, and the other end of which has a toothed structure. The clamp is a ring structure that fits into the middle of the sleeve, and the two ends of the clamp are tightened in a worm gear structure.

3. A nitrogen supply valve according to claim 1, characterized in that: The adjusting component includes an upper shell, a lower shell, and a diaphragm, with the diaphragm clamped and fixed between the upper shell and the lower shell.

4. A nitrogen supply valve according to claim 3, characterized in that: The valve body has a valve core for switching inside. The valve stem extends into the valve body and connects with the valve core. A through hole is opened in the middle of the valve body. The bottom end of the valve core is a truncated cone-shaped wedge. The inner wall of the through hole is an outwardly inclined abutting cone surface. The wedge of the valve core can be embedded in the inner wall of the through hole. The valve core can adjust the gap width between the abutting cone surface and the wedge through the valve stem.

5. A nitrogen supply valve according to claim 4, characterized in that: The valve body has a first flow channel and a second flow channel at both ends, and the first flow channel and the second flow channel are connected by a through hole to form a conductive structure. Both ends of the valve body are provided with mounting flanges, which are located at the ports of the first flow channel and the second flow channel.

6. A nitrogen supply valve according to claim 5, characterized in that: The top end of the valve stem penetrates the valve body, lower shell, and diaphragm. The top end of the valve stem is fixedly connected to the center of the diaphragm. The bottom end of the valve stem extends into the interior of the valve body. The top end of the valve core is a columnar connecting post with a hole diameter smaller than the through hole. The valve core is fixedly connected to the valve stem through the connecting post.

7. A nitrogen supply valve according to any one of claims 1-6, characterized in that: The top of the adjusting component is also provided with an adjusting cylinder, and the inside of the adjusting cylinder is provided with a rotatable adjusting screw. The bottom end of the adjusting screw extends into the interior of the adjusting component, and the adjusting screw is threadedly connected to the adjusting component. The bottom end of the adjusting screw abuts against the top end of the valve stem.

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