Regulating valve for hydrogen

Abstract

The utility model relates to the technical field of regulating valves, in particular to a regulating valve for hydrogen, which comprises a valve body, an internal channel of the valve body extends to the outside and is provided with three ports, a first port is arranged at the top of the valve body, and a second port and a third port are arranged on the side surface of the valve body; the valve cover is arranged at the top of the valve body; the valve rod penetrates through the valve cover, one end extends into the valve body, and the other end extends to the outside; the valve plug is arranged in the valve body, one end of the valve rod is fixedly connected with the valve plug, and connection and disconnection of the second opening and the third opening are controlled; wherein a connecting thread is arranged at the joint of the valve rod and the valve plug, and a plurality of self-locking thin nuts are arranged on the part, extending out of the valve plug, of the valve rod. According to the utility model, the valve rod and the valve plug are fixed through the connecting threads, and the part of the valve rod extending out of the valve plug is provided with a plurality of self-locking thin nuts, so that the stationarity is enhanced, the flow and direction of fluid passing through the second port and the third port are flexibly controlled by adjusting the valve rod, and different use requirements are met; and the valve rod is effectively prevented from loosening in the long-term use process.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a regulating valve for hydrogen. Background Art

[0002] In the automatic control system of modern factories, the regulating valve plays a very important role. It can automatically control the opening of the valve according to the control signal, control process parameters such as the flow rate, temperature, and pressure of the medium, and promote the realization of the automatic regulation function.

[0003] With the strong promotion of hydrogen energy and the expansion of hydrogen production and hydrogenation enterprises, the demand for valves used in the hydrogen system is also increasing. Due to the special requirements of hydrogen in terms of safety, the requirements for regulating valves used in the hydrogen system are getting higher and higher. It not only needs to meet the usage requirements of the regulating valve but also needs to consider the characteristics of hydrogen being colorless, odorless, extremely flammable, and having small hydrogen molecules. Moreover, the valve stem of the regulating valve used for a long time is extremely easy to loosen.

[0004] In order to solve the above problems, a regulating valve for hydrogen is designed.

[0005] The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Utility Model

[0006] The utility model provides a regulating valve for hydrogen, thus effectively solving the problems in the background art.

[0007] In order to achieve the above object, the technical solution adopted by the utility model is: a regulating valve for hydrogen, comprising:

[0008] 1. A regulating valve for hydrogen, characterized by comprising:

[0009] A valve body, the internal channel of the valve body is set as a meandering flow type, the internal channel extends to the outside with three ports, the ports are respectively a first port, a second port and a third port, the first port is arranged at the top of the valve body, and the second port and the third port are arranged on the side surface of the valve body;

[0010] A valve cover, the valve cover is arranged on the top of the valve body to cover the first port;

[0011] A valve stem, the valve stem penetrates through the valve cover, one end extends into the valve body, the other end extends to the outside, and moves along the vertical direction;

[0012] A valve plug is disposed inside the valve body. One end of the valve stem is fixedly connected to the valve plug, and the valve plug moves in the vertical direction to control the on / off of the second port and the third port.

[0013] Wherein, a connecting thread is provided at the connection between the valve stem and the valve plug, and a number of self-locking thin nuts are provided on the part of the valve stem extending outside the valve plug.

[0014] Further, a boss is provided on the valve stem, and the boss is disposed above the connecting thread between the valve stem and the valve plug for stopping and fixing the valve stem to prevent the valve stem from loosening and coming out.

[0015] Further, an anti-wear ring is provided on the passage of the valve stem passing through the valve cover. The anti-wear ring is disposed at a position close to the bottom of the valve cover, and the diameter of the passage is larger than the diameter of the valve stem.

[0016] Further, a positioning stop is provided on the valve plug, and the positioning stop is used for guiding and fixing the valve stem.

[0017] Further, a packing mechanism is provided at the top of the valve cover. The packing mechanism is filled with packing for pressing the valve cover, and the packing contacts the valve stem to form a seal.

[0018] Further, a sleeve is provided between the part of the valve plug in contact with the valve body. The sleeve is slidably connected to the valve plug, and a number of channel openings are provided on the sleeve, and the channel openings are used to realize the flow between the second port and the third port.

[0019] Further, sealing components are provided between the valve body and the sleeve, between the valve body and the valve seat, between the valve plug and the sleeve, between the valve cover and the valve body, and at the top of the valve cover;

[0020] Wherein, the sealing component includes a wound metal gasket, an O-ring and a valve gasket.

[0021] Further, the materials of the valve body, the valve cover, the valve plug and the valve stem are selected as austenitic stainless steel, the material of the O-ring is selected as nitrile rubber, the material of the valve gasket is selected as polytetrafluoroethylene, and the material of the wound metal gasket is selected as a composite material composed of stainless steel and graphite.

[0022] The beneficial effects of the present utility model are as follows: The connection between the valve stem and the valve plug is fixed through connecting threads, and a number of self-locking thin nuts are assembled on the part of the valve stem extending outside the valve plug, enhancing the fixation of the entire structure. Moreover, precise fluid control can be achieved inside the valve body. By adjusting the position of the valve stem, the flow rate and direction of the fluid passing through the second port and the third port can be flexibly controlled, thereby adapting to different usage requirements and working conditions. This design adopts a dual fixation method, namely the connecting threads between the valve stem head and the valve plug and the self-locking thin nuts on the extending part of the valve stem head, which can effectively prevent the valve stem from loosening during long-term use and reduce the leakage risk caused by loosening, ensuring the overall safety and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of a regulating valve for hydrogen;

[0025] Reference numerals: 1, valve body; 11, internal passage; 11A, first port; 11B, second port; 11C, third port; 2, valve cover; 21, anti-wear ring; 22, packing mechanism; 3, valve stem; 31, self-locking thin nut; 32, boss; 4, valve plug; 41, positioning stop; 5, sleeve; 51, passage port; 6, sealing assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] As Figure 1 shown, a regulating valve for hydrogen includes:

[0030] A valve body 1, the internal passage 11 of the valve body 1 is arranged in a meandering manner, and the internal passage 11 extends to the outside with three ports, which are the first port 11A, the second port 11B, and the third port 11C respectively. The first port 11A is arranged at the top of the valve body 1, and the second port 11B and the third port 11C are arranged on the side of the valve body 1;

[0031] A valve cover 2, the valve cover 2 is arranged on the top of the valve body 1 to cover the first port 11A;

[0032] A valve stem 3, the valve stem 3 penetrates through the valve cover 2, one end extends into the valve body 1, and the other end extends to the outside, and moves in the vertical direction;

[0033] A valve plug 4, the valve plug 4 is arranged inside the valve body 1, one end of the valve stem 3 is fixedly connected to the valve plug 4, and the valve plug 4 moves in the vertical direction to control the opening and closing of the second port 11B and the third port 11C;

[0034] Wherein, a connecting thread is provided at the connection between the valve stem 3 and the valve plug 4, and a number of self-locking thin nuts 31 are provided on the part of the valve stem 3 extending outside the valve plug 4.

[0035] The internal passage 11 of the valve body 1 is designed in a meandering manner. This passage extends from the inside to the outside and forms three ports. The valve cover 2 is located on the top of the valve body 1 to cover the first port 11A, while the second port 11B and the third port 11C are located on the side of the valve body 1. The valve stem 3 passes through the valve cover 2, one end enters the valve body 1, and the other end extends to the outside. Through the movement in the vertical direction, the valve stem 3 drives the valve plug 4 fixedly connected thereto to move in the vertical direction, thereby controlling the opening and closing of the second port 11B and the third port 11C.

[0036] The connection between the valve stem 3 and the valve plug 4 is fixed through connecting threads, and several self-locking thin nuts 31 are assembled on the part of the valve stem 3 extending outside the valve plug 4, enhancing the fixation of the entire structure. Moreover, precise fluid control can be achieved inside the valve body 1. By adjusting the position of the valve stem 3, the flow rate and direction of the fluid passing through the second port 11B and the third port 11C can be flexibly controlled, so as to adapt to different usage requirements and working conditions. This design adopts a dual fixation method, that is, the connecting threads between the head of the valve stem 3 and the valve plug 4 and the self-locking thin nuts 31 on the extending part of the head of the valve stem 3, which can effectively prevent the valve stem 3 from loosening during long-term use, reduce the leakage risk caused by loosening, and ensure the overall safety and efficiency.

[0037] In this embodiment, the materials of the valve body 1, the valve cover 2, the valve stem 3, and the valve plug 4 are selected as austenitic stainless steel. The material of the O-ring seal on the valve plug 4 is selected as nitrile rubber. The material of the valve port gasket is selected as polytetrafluoroethylene, and the material of the metal wound gasket is selected as a composite material composed of stainless steel and graphite.

[0038] Due to its excellent mechanical strength and corrosion resistance, austenitic stainless steel can significantly reduce the risk of material damage when contacting with media such as hydrogen that is prone to cause metal hydrogen embrittlement. At the same time, as the material of the O-ring seal, nitrile rubber can provide effective sealing during valve operation and prevent gas leakage due to its good chemical stability and sealing performance. The valve port gasket is made of carbon fiber-reinforced filled polytetrafluoroethylene, which is chemically stable, resistant to high and low temperatures, wear-resistant and corrosion-resistant, ensuring good sealing effect during long-term opening and closing of the valve and preventing gas leakage. The combination of materials not only improves the operation safety of the regulating valve but also extends its service life, ensuring the stable operation of the system under high pressure and harsh environments. The two materials of stainless steel and graphite have stable chemical properties, are wear-resistant and corrosion-resistant, have excellent resilience, have appropriate plasticity, can adapt to the uneven sealing surface after being pressed and fill the sealing gap, and can ensure good sealing under the condition of temperature and pressure changes.

[0039] In this embodiment, a boss 32 is provided on the valve stem 3. The boss 32 is arranged above the connecting threads between the valve stem and the valve plug and is used to stop and fix the valve stem 3.

[0040] The design of the boss 32 not only effectively prevents the valve stem 3 from loosening or even detaching during long-term use or under high-pressure conditions but also greatly facilitates the installation and tightening of the self-locking thin nuts 31. By arranging the structure of the boss 32, the stability of the valve stem 3 is strengthened, and at the same time, the maintenance and adjustment work are simplified.

[0041] In this embodiment, an anti-wear ring 21 is provided on the channel through which the valve stem 3 passes through the valve cover 2. The anti-wear ring 21 is arranged at a position close to the bottom of the valve cover 2, and the diameter of the channel is larger than the diameter of the valve stem 3.

[0042] The wear-resistant ring 21 is arranged at the passage where the valve stem 3 penetrates through the valve cover 2 and is located at the bottom of the valve cover 2, providing an additional fixed guiding effect for the valve stem 3. Since the diameter of the passage is larger than that of the valve stem 3, the arrangement of the wear-resistant ring 21 helps to reduce the friction between the contact surfaces of the valve stem 3 and the valve cover 2, thus significantly reducing the wear of the valve stem 3. This not only improves the concentricity of the valve stem 3, ensures the smoothness and accuracy of the movement of the valve stem 3, but also extends the service life of the valve stem 3 and the entire valve. By enhancing the guiding stability of the valve stem 3, the reliability of the entire control valve is improved, effectively avoiding the performance degradation caused by friction during long-term operation and ensuring the continuous and stable operation of the system.

[0043] In this embodiment, a positioning stop 41 is provided on the valve plug 4, and the positioning stop 41 is used to guide and fix the valve stem 3.

[0044] As a key structure for guiding and fixing the valve stem 3, the positioning stop 41 ensures the concentricity and straightness of the valve stem 3 during vertical movement, thereby reducing friction and wear during operation. This not only optimizes the movement efficiency of the valve stem 3, but also improves the overall sealing performance and reliability of the valve. The stability of the control valve during long-term use is guaranteed, effectively extending the service life of the equipment, reducing maintenance costs at the same time, and ensuring the efficient operation of the system under various working conditions.

[0045] In this embodiment, a packing mechanism 22 is provided at the top of the valve cover 2. The packing mechanism 22 is filled with packing inside and is used to compress the valve cover 2.

[0046] The packing mechanism 22 compresses the valve cover 2 through the packing filled inside, effectively preventing the leakage of gas or liquid, and at the same time maintaining the sealing performance of the valve stem 3 during operation. The existence of this sealing mechanism greatly improves the overall safety and environmental protection performance of the control valve.

[0047] In this embodiment, a sleeve 5 is arranged between the contact part of the valve plug 4 and the valve body 1. The sleeve 5 is slidably connected to the valve plug 4, and a plurality of channel openings 51 are provided on the sleeve 5. The channel openings 51 are used to realize the communication between the second port 11B and the third port 11C.

[0048] The sleeve 5 realizes flexible adjustment of the fluid passage through its sliding connection with the valve plug 4. The passage opening 51 on the sleeve 5 is responsible for guiding the fluid from the inside of the valve body 1 to the second port 11B and the third port 11C. In addition, the passage opening 51 on the side wall of the sleeve 5 can be designed as an equal percentage, linear, or quick opening type according to different application requirements, and each design has specific flow control characteristics. The equal percentage window provides non-linear adjustment, making the flow rate change gradually at the initial stage of opening and increasing rapidly when approaching full open, which is suitable for occasions requiring fine control; the linear window provides a uniform increase in flow rate and is suitable for applications requiring stable flow control; the quick opening window design allows the flow rate to increase rapidly at the initial stage of the valve, which is suitable for occasions requiring quickly reaching a large flow rate.

[0049] Through the flexible flow regulation function, not only the adaptability and efficiency of the valve are improved, but also the performance of the entire system is optimized, ensuring the accuracy and reliability of fluid control.

[0050] In this embodiment, sealing components 6 are provided between the valve body 1 and the sleeve 5, between the valve plug 4 and the sleeve 5, and at the top of the valve cover 2.

[0051] The sealing components 6 are provided between the valve body 1 and the sleeve 5, between the valve plug 4 and the sleeve 5, and at the top of the valve cover 2, enhancing the sealing performance of the entire valve. The application of the sealing components 6 ensures that when the valve plug 4 and the sleeve 5 move, the fluid inside the valve will not leak, and at the same time prevents external impurities from entering the valve interior. By setting the sealing components 6 at the key contact points, the valve can maintain efficient fluid control during operation, reducing the energy waste and environmental risks that may be caused by leakage. In addition, the excellent sealing performance also helps to extend the service life of the regulating valve, reducing the wear and corrosion between components, thus ensuring the reliability and stability of the regulating valve during long-term operation.

[0052] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydrogen regulating valve, characterized in that: include: A valve body, wherein the internal passage of the valve body is arranged in a meandering manner, and the internal passage extends to the outside and has three openings, the openings being respectively a first opening, a second opening and a third opening, the first opening being arranged at the top of the valve body, and the second opening and the third opening being arranged at the side of the valve body; A valve cover, the valve cover is arranged on the top of the valve body and covers the first port; A valve stem, which passes through the valve cover, has one end extending into the interior of the valve body and the other end extending to the exterior, and moves in a vertical direction; A valve plug, the valve plug is arranged inside the valve body, one end of the valve stem is fixedly connected to the valve plug, and the valve plug moves in a vertical direction to control the opening and closing of the second port and the third port; Wherein, a connecting thread is arranged at the connection between the valve stem and the valve plug, and a plurality of self-locking thin nuts are arranged on the portion of the valve stem extending out of the valve plug.

2. The hydrogen regulating valve according to claim 1, characterized in that: The valve stem is provided with a boss, which is arranged above the connecting thread between the valve stem and the valve plug and is used to stop and fix the valve stem to prevent the valve stem from falling out after being loosened.

3. The hydrogen regulating valve according to claim 1, characterized in that: An anti-wear ring is arranged on the passage through which the valve stem passes through the valve cover. The anti-wear ring is arranged at a position close to the bottom of the valve cover, and the diameter of the passage is greater than the diameter of the valve stem.

4. The hydrogen regulating valve according to claim 2, characterized in that: The valve plug is provided with a positioning stop, and the positioning stop is used to guide and fix the valve stem.

5. The hydrogen regulating valve according to claim 3, characterized in that: A packing mechanism is arranged on the top of the valve cover, and packing is filled inside the packing mechanism to compress the valve cover, and the packing contacts the valve stem to form a seal.

6. The hydrogen regulating valve according to claim 1, characterized in that: A sleeve is arranged between the contact part of the valve plug and the valve body, the sleeve is slidably connected with the valve plug, and a plurality of channel openings are arranged on the sleeve, and the channel openings are used to realize the flow between the second port and the third port.

7. The hydrogen regulating valve according to claim 6, characterized in that: Sealing components are provided between the valve body and the sleeve, between the valve body and the valve seat, between the valve plug and the sleeve, between the valve cover and the valve body, and on the top of the valve cover; Wherein, the sealing assembly includes a metal wound gasket, an O-ring and a valve gasket.

8. The hydrogen regulating valve according to claim 7, characterized in that: The valve body, the valve cover, the valve plug and the valve stem are made of austenitic stainless steel, the O-ring is made of nitrile rubber, the valve gasket is made of polytetrafluoroethylene, and the metal wound gasket is made of a composite material composed of stainless steel and graphite.

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