Heat dissipation type pressure reducing valve for preventing gas desublimation

Abstract

The invention relates to the technical field of gas pressure reducing valves, and discloses a heat dissipation type pressure reducing valve for preventing gas desublimation, which mainly comprises a valve body assembly, a valve switch group and a valve cover group. The valve body assembly comprises a valve body and a crank arm, and up-down movement of the diaphragm set is converted into left-right movement. And the valve inlet and the valve outlet are connected in series without intersection, so that heat exchange between the valve inlet and the valve outlet can be effectively reduced. A diffuser in the valve switch group comprises a diffusion cavity, an extension valve rod, a supporting ring and a valve plate. The crank arm drives the extension valve rod to precisely control the opening degree of the valve, and throttling and pressure reduction are conducted on high-pressure gas. And meanwhile, the diffuser dissipates heat (cold) of the decompressed low-temperature gas, so that the low temperature of the decompressed gas transmitted to the high-pressure inlet end of the pressure reducing valve is effectively reduced, and desublimation caused by supercooling of the high-pressure gas at the inlet end is avoided. And outlet low temperature transferred to the valve body group and the valve cover group can be reduced, and the valve cover group is prevented from being condensed and frozen. The pressure reducing valve is suitable for various macromolecular high-pressure gas pressure reducing occasions.

Description

Technical Field

[0001] The invention relates to the technical field of gas pressure reducing valves, and in particular to a heat dissipation type pressure reducing valve for preventing gas condensation. Background Art

[0002] In industrial gas applications, for the convenience of storage and transportation, the gas is usually compressed and stored in high-pressure gas cylinders. When users need to use these gases, they must be decompressed through a pressure reducing valve to make the gas pressure meet the use requirements. During the gas compression process, external forces do work on it, the internal energy increases, and its temperature rises. During the decompression, the gas expands and does work externally, the internal energy decreases, the temperature drops, and it absorbs heat from the surroundings, causing the temperature of the pressure reducing valve to drop.

[0003] In particular, for gases with polyatomic molecules, the molecular mass is large, the internal energy is large, and the temperature drops more after decompression. For example, carbon dioxide, Figure 1 As shown in the figure, when it is reduced from a high pressure state to a low pressure state, the gas temperature at the high pressure end of the valve may drop to a level sufficient to cause the gas to condense. The condensation phenomenon will cause the formation of solid particles (such as dry ice), which will affect the opening and closing state of the valve, which may interfere with the normal operation of the pressure reducing valve. In order to prevent this from happening, such as Figure 3 , Figure 4 As shown, the existing technical solutions mainly rely on external heat dissipation (cooling) means or electric heating to maintain the temperature of the gas at the inlet of the pressure reducing valve to prevent condensation.

[0004] However, these existing technical solutions have some problems. First, there is an intersection between the inlet and outlet of the existing external heat dissipation (cooling) pressure reducing valve. Although the heat dissipation fins are added to absorb heat from the surrounding environment, the low temperature at the outlet will still be directly transferred to the high-pressure side of the inlet, reducing the gas temperature at the high-pressure inlet end. Figure 1 As shown, the higher the gas pressure, the higher the condensation temperature, and the easier it is to condense. When working for a long time or the working flow is large, the gas temperature at the high-pressure inlet end is more likely to drop to the condensation temperature, condensation occurs at the inlet end, and solid crystals are formed, affecting the normal operation of the pressure reducing valve. The electric heating method increases the complexity and cost of the system, and the electric heating method also requires additional power supply and related safety measures. In addition, these technologies are mainly suitable for small flow gas supply occasions. When the gas flow is large or it needs to work for a long time, condensation will occur, affecting electrical safety, and they may not be able to effectively prevent the occurrence of condensation.

[0005] Therefore, how to effectively solve the problems of condensation and sublimation caused by the temperature drop during the pressure reduction process of the pressure reducing valve has become a technical problem that needs to be solved urgently in the field of industrial gas applications. Summary of the invention

[0006] One of the purposes of the present invention is to provide a heat dissipation pressure reducing valve that prevents gas condensation. By improving the structural design of the pressure reducing valve, a crank arm is used to convert the up-and-down movement of the diaphragm assembly into left-and-right movement, so that the valve switch group is separated from the valve body, and there is no intersection between the inlet and outlet of the pressure reducing valve. The low temperature of the outlet is not easily transmitted to the high-pressure inlet, and the gas temperature of the high-pressure inlet will not be too low. The condensation phenomenon of the high-pressure inlet gas during the pressure reduction process is prevented, and at the same time, condensation and freezing at the valve body end are eliminated to ensure the normal operation of the pressure reducing valve.

[0007] In order to solve the above technical problems, the present invention provides a heat dissipation pressure reducing valve for preventing gas condensation, comprising a valve body assembly, a valve switch assembly and a valve cover assembly.

[0008] The valve body assembly comprises a valve body and a crank arm, and the crank arm can swing to convert the up-and-down movement of the diaphragm assembly into left-and-right movement.

[0009] The valve switch group includes a valve inlet group and a diffuser, which is connected to the lower side of the valve body assembly through a heat insulation pad and has no intersection with the valve body assembly. The inlet group and the diffuser are connected in series and have no intersection, which can effectively reduce the heat (cold) conduction between them. A gas channel is set between the valve inlet group and the diffuser, and the gas channel connects the valve inlet group and the diffuser;

[0010] When high-pressure gas passes through the valve inlet group, the high-pressure gas is throttled and decompressed, and enters the diffuser for heat dissipation (cooling), absorbing external heat;

[0011] The valve cover assembly is connected to the valve body assembly and is used to adjust the output pressure of the high-pressure gas and stabilize the pressure within a required range.

[0012] In addition to the above technical features, the present invention also makes improvements in the following aspects:

[0013] In some embodiments, a diaphragm cavity is provided in the valve body, and a pin groove and a vent hole penetrating the valve body are provided on one side of the bottom of the valve body;

[0014] The crank arm comprises a pin shaft and a crank arm, wherein the pin shaft is used to connect and support the crank arm; the pin shaft is inserted into the hinge hole of the crank arm so that the crank arm can rotate around the pin shaft;

[0015] The crank arm includes an active arm and a passive arm. The passive arm of the crank arm is inserted into the vent hole of the valve body. The crank arm is installed at the pin groove on the valve body through a pin. One end of the passive arm of the crank arm abuts against the extended valve stem, and the lower side of the active arm of the crank arm abuts against the upper end of the reset spring.

[0016] In some embodiments, the active arm and the driven arm of the crank arm form an included angle of a certain angle.

[0017] In some embodiments, a boss may be provided at the bottom center of the diaphragm cavity, and a reset spring is installed on the boss. The reset spring is sleeved outside the boss provided at the center of the valve body and is used to reset the crank arm and the valve stem.

[0018] In some embodiments, a boss may be provided at the bottom center of the diaphragm cavity, a reset spring is installed on the boss, and the reset spring is sleeved outside the boss provided at the center of the valve body for resetting the crank arm and the valve stem.

[0019] In some embodiments, the valve inlet assembly includes an inlet section, a valve stem, and a spring assembly;

[0020] The center of the inlet section is provided with an air duct along its axial direction, and the middle section of the air duct is provided with a support plate with a center hole;

[0021] One end of the valve stem is set to be conical; the other end is installed with a spring assembly; the spring assembly is installed to match the center hole of the support plate;

[0022] The valve stem is installed in the air passage at the center of the inlet section, and the valve stem can move axially along the air passage.

[0023] In some embodiments, a pressure measuring threaded hole is provided on the side of the inlet section and is connected to the gas channel.

[0024] In some embodiments, the diffuser includes a diffuser, and a diffusion cavity is defined in the diffuser;

[0025] An extended valve stem, a support ring and a valve plate are arranged in the diffusion chamber;

[0026] The extended valve stem is mounted on the support ring and can slide axially along the support ring;

[0027] The valve plate is arranged in a multi-step concave cavity arranged near the inlet section of the diffusion cavity;

[0028] The support ring is placed in the diffusion chamber, and the extended valve stem passes through the support ring and abuts against the valve stem of the valve inlet group. The extended valve stem pushes the valve stem to move and adjust the opening between the valve stem and the valve plate to perform throttling and pressure reduction and control the valve output pressure.

[0029] In some embodiments, one end of the diffuser is a square flange, the other end is a block with a convex edge, and the middle part is a column with heat dissipation fins on the outer surface;

[0030] The center of the square flange is provided with a multi-step concave cavity, the center of the end of the block is provided with a pipe thread hole, and the multi-step concave cavity is connected with the diffusion cavity;

[0031] A transverse flange is provided in the middle of one side of the block body, a vent hole is opened in the center of the transverse flange, and the vent hole is communicated with the pipe thread hole.

[0032] In some embodiments, the valve plate is in the shape of a raised frustum with a small central hole at one end, an inverted slope at the center of the front end, and is placed in a double-step concave cavity at the front end of the diffuser.

[0033] In some embodiments, the support ring is a disk with a central through hole and a through channel on the periphery. The outer circumferential surface of the disk cooperates with the diffusion cavity in the diffuser and is fixed in the diffusion cavity. One support ring is provided at the front and the back.

[0034] In some embodiments, the extended valve stem is in the shape of a round rod, with a disc head provided at one end, which cooperates with the central hole of the support ring and is placed in the center of the support ring.

[0035] In some embodiments, an outlet connector is provided at the outlet of the diffusion chamber;

[0036] The air outlet connector is a three-way threaded pipe connector with external heat dissipation fins, and has an inlet male thread and at least one outlet female threaded hole.

[0037] In some embodiments, the pressure regulating spring of the valve cover assembly is adjusted through a knob assembly to change the position of the diaphragm assembly, and then the opening of the valve plate is adjusted through the crank arm and the valve stem.

[0038] In some embodiments, the heat dissipation pressure reducing valve for preventing gas condensation further includes an inlet pressure gauge and an outlet pressure gauge, which are respectively connected to the pressure measuring threaded hole and one side of the gas outlet joint for monitoring the gas pressure at the inlet and outlet.

[0039] By adopting the above technical solution, the present invention has at least one of the following beneficial effects:

[0040] 1. Effectively prevent gas condensation

[0041] The present invention throttles and reduces the pressure of high-pressure gas through the air intake section, and the diffuser dissipates heat (cools). When the high-pressure gas is reduced in pressure through the pressure reducing valve, its temperature decreases during expansion, and the absorbed heat can be quickly dissipated to the external environment, that is, the external environment quickly absorbs heat; thereby avoiding a sharp drop in gas temperature and effectively preventing the problem of gas condensation due to temperature reduction during the pressure reduction process.

[0042] 2. Increase the working flow of the pressure reducing valve

[0043] The present invention separates the valve flap assembly from the valve body assembly and moves it to the outside, so that the heat absorbed by the gas during decompression and expansion can be more fully exchanged to the outside, reducing the negative impact of low temperature at the valve outlet on the valve operation. This design enables the pressure reducing valve to work normally without power supply and heating, with a larger working flow and a wider range of applications.

[0044] 4. Accurately adjust the output pressure

[0045] The present invention affects the position of the diaphragm assembly by changing the compression amount of the pressure regulating spring, and then adjusts the opening of the valve plate through the crank arm and the valve stem to achieve separation of the valve body and the inlet assembly and precise control of the output pressure. The precise adjustment of the pressure regulating spring and the knob assembly of the valve cover group can stably control the pressure of the outlet gas, and then indirectly affect the temperature of the gas, so that it is kept within the range that is not easy to condense, and then accurately adjust the output pressure, so that the pressure reducing valve can meet the pressure regulation requirements under different working conditions.

[0046] 5. The present invention adopts an external switch mechanism for the inlet of the pressure reducing valve, which is separated from the valve body to isolate the low temperature area of ​​the pressure reducing valve after pressure reduction, and prevent the high pressure inlet section from being too low to produce condensation. This solves the problem that the gas pressure reducing valve produces dry ice due to gas condensation, which affects the normal operation of the pressure reducing valve. Without power supply or heating, the pressure reducing valve can still work normally at a large flow rate, saving energy, working reliably, and being easy to use.

[0047] In summary, the present invention separates the valve outlet that needs to absorb heat externally through innovative design and optimized structure, and the valve inlet and outlet have no intersection, thereby reducing the impact of the low temperature of the valve outlet on the high-pressure inlet of the valve, and reducing the risk of condensation on the high-pressure side of the valve inlet. The heat required to be absorbed by the gas after decompression can be more fully exchanged to the outside of the diffusion section and the outlet, ensuring that the temperature of the inlet is higher than the condensation temperature, and no dry ice solid is generated. The working flow of the pressure reducing valve can be larger when it is used, without the need for electric heating.

[0048] The invention avoids the rapid drop of gas temperature, effectively prevents the condensation problem of gas caused by the rapid drop of gas temperature during the decompression process, and has broad application prospects in modern industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0050] Figure 1 It is the three-phase state diagram of CO2;

[0051] Figure 2 It is a structural schematic diagram of an external heat dissipation pressure reducing valve in the prior art;

[0052] Figure 3 It is a structural schematic diagram of an existing electric heating pressure reducing valve;

[0053] Figure 4 It is a cross-sectional schematic diagram of a heat dissipation type pressure reducing valve for preventing gas condensation in accordance with a first embodiment of the present invention;

[0054] Figure 5It is an isometric view of a heat dissipation type pressure reducing valve for preventing gas condensation according to a first embodiment of the present invention;

[0055] Figure 6 This is an exploded schematic diagram of a heat dissipation type pressure reducing valve for preventing gas condensation according to a first embodiment of the present invention;

[0056] Figure 7 It is a cross-sectional view of the inlet section of the first embodiment of the present invention;

[0057] Figure 8 A cross-sectional view of a diffuser according to a first embodiment of the present invention;

[0058] Fig. 9 It is a cross-sectional view and views at different angles of a valve body of an embodiment of the present invention;

[0059] Fig.10 A schematic structural diagram of a crank arm assembly according to an embodiment of the present invention;

[0060] Fig.11 This is an exploded schematic diagram of a valve body assembly according to a first embodiment of the present invention;

[0061] Fig.12 This is a schematic diagram of the working principle of the first embodiment of the present invention;

[0062] Fig.13 This is a schematic diagram of the split structure of the second implementation of the present invention.

[0063] The numbers in the figure are as follows:

[0064] 100, valve switch group; 110, inlet pressure gauge; 120, outlet pressure gauge; 300, valve inlet group; 310, inlet section; 312, flange; 313, air duct; 316, support plate; 317, pressure measuring threaded hole; 318, flange threaded hole; 319, heat dissipation fin; 320, valve stem; 200, valve body assembly; 210, valve body; 211, diaphragm cavity; 212, external thread; 213, boss; 214, air vent; 215, screw hole; 216, pin shaft groove; 217, crank arm groove; 219, sealing end face; 220, crank arm; 221, pin shaft; 222, right-angle arm; 223. Active arm; 224. Driven arm; 225. Arc; 226. Hinge support; 227. Hinge support hole; 230. Return spring; 240. Connecting screw; 400. Diffuser; 410. Diffuser; 412. Block; 413. Heat dissipation fin; 414. Multi-step cavity; 415. Pipe thread hole; 416. Diffuser cavity; 417. Transverse flange; 418. Air vent 420. Valve plate; 430. Support ring; 440. Extended valve stem; 450. Insulation pad; 460. Air outlet connector; 500. Valve cover assembly; 510. Diaphragm assembly; 520. Pressure regulating spring; 530. Knob assembly. DETAILED DESCRIPTION

[0065] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in other different forms and is not limited to the embodiments described herein.

[0066] 1. Explanation of Descriptive Terms in the Present Invention

[0067] The embodiments of the present invention in combination with the technical solutions are intended to make the present invention more thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically described in the present invention, the relative arrangement of the components described in these embodiments should be interpreted as merely exemplary, rather than as a limitation to the technical solutions of the present invention.

[0068] If the present invention involves the use of directional terms such as "upper", "lower", "left", "right", "bottom", "top", etc., they are defined relative to the directions in the respective drawings and are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be understood as restrictive terms.

[0069] In the present invention, the words "a", "an", "a", "the" and the like do not indicate a quantity limitation and may indicate the singular or plural. The terms "include", "comprises", "has" and any variations thereof involved in the present invention are intended to cover non-exclusive inclusions; the terms "first", "second", "third" and the like involved in the present invention are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0070] In the present invention, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0071] In addition, the present invention does not discuss in detail the techniques and devices known to ordinary technicians in the relevant fields, but where appropriate, the techniques and devices should be considered as part of the specification.

[0072] 2. Based on the existing technology, when solving the sublimation and condensation problems caused by the temperature drop during the pressure reduction process of the pressure reducing valve, there are mainly the following disadvantages: First, the existing heat dissipation (cold) technical solution does not solve the key problem of condensation, and there is still an intersection between the valve inlet and outlet. Although heat dissipation fins are set externally, the low temperature at the outlet will still be quickly transmitted to the high-pressure inlet, causing condensation; second, the electric heating technology is complex and costly, and needs to rely on external heat dissipation or electric heating equipment; the electric heating method has safety hazards and requires additional power supply and safety measures; third, the applicability of these technical solutions is limited, and it is difficult to effectively deal with the sublimation phenomenon during large flow or long-term operation, which affects the stable operation of the pressure reducing valve. Based on the above problems, the present invention specifically provides a technical solution to solve the above problems. The technical solution, working principle and technical effect of the present invention are described in detail below in combination with specific embodiments.

[0073] In order to more clearly illustrate the technical solution adopted by the present invention, the pressure reducing principle of the pressure reducing valve is described as follows:

[0074] The pressure reducing valve reduces pressure by throttling. When throttling, the pressure difference between upstream and downstream is large, and the throttling gap is small. When high-pressure gas enters the throttling gap, the pressure energy is converted into air flow velocity energy, the air flow velocity becomes very high, and the pressure is reduced to the outlet pressure. When the gas flows out of the gap, it expands and does work. Through impact and momentum exchange, most of the gas kinetic energy is consumed to achieve pressure reduction. In actual operation, the outlet pressure is sensed by the diaphragm, and the opening of the throttle is adjusted through negative feedback. When the outlet flow increases, the outlet pressure will decrease, and the thrust of the pressure regulating spring will push the diaphragm downward, increase the throttle, increase the flow, increase the outlet pressure, reach a new balance, and maintain the outlet pressure stable. Conversely, when the outlet flow decreases, the outlet pressure will increase, and the outlet pressure will push the diaphragm upward. The reset spring pushes the valve stem to reset and reduce the throttle, reduce the flow, reduce the outlet pressure, reach a new balance, and maintain the outlet pressure stable. Until zero flow, the conical surface of the valve stem 320 rests on the central orifice of the valve plate 420, closing the throttle.

[0075] Embodiment 1

[0076] Combined with the description of the above principles, such as Figure 4 , Figure 5 As shown, the present invention describes a heat dissipation type pressure reducing valve for preventing gas condensation, which includes a valve switch assembly 100, a valve body assembly 200 and a valve cover assembly 500.

[0077] The valve switch group 100 includes a valve inlet group 300 and a diffuser 400 . A gas channel is provided between the valve inlet group 300 and the diffuser 400 . The gas channel connects the valve inlet group 300 and the diffuser 400 .

[0078] The valve inlet assembly 300 includes an inlet section 310 , a valve stem 320 , a return spring, a spring seat and a damping ring.

[0079] like Figure 7 As shown, the inlet section 310 has a base body that is a square block, a front section that is a boss, and a rear section that is a flange with a central convex edge.

[0080] A transversely penetrating air duct 313 is arranged at the center of the inlet section 310 along its axial direction, and the position of the air duct 313 corresponding to the boss is an inlet connecting screw hole; the position of the air duct 313 corresponding to the flange is a two-section circular cavity with a small outer part and a large inner part; the middle section of the air duct 313 is provided with a support plate 316 with a center hole, and a plurality of flow channel holes are opened around the support plate 316. The flow channel holes of the support plate 316 connect the support plate 316 to the front and back, and the center hole of the support plate 316 is conical.

[0081] A pressure measuring threaded hole 317 is provided on the side of the middle section of the block of the inlet section 310. The pressure measuring threaded hole 317 is connected to the gas channel and is used to connect the inlet pressure gauge 110 to measure the gas pressure at the inlet.

[0082] The valve stem 320 is installed in the air passage 313 at the center of the inlet section 310 , and the valve stem 320 can move axially along the air passage 313 .

[0083] The valve stem 320 is a multi-step rotating body, the main body of which is a columnar structure, the outer periphery of which is cut into a polygon, which also serves as a fluid channel and retains a guide position.

[0084] One end of the valve stem 320 is set to be conical, and a return spring is installed at the other end. The return spring is sleeved on the valve stem 320, one end abuts against the spring seat set at the end of the valve stem 320, and the other end abuts against the conical bottom of the valve stem 320.

[0085] The center hole of the support plate 316 is set to be conical, and the spring seat is installed to match the center hole of the support plate 316 to provide support for the return spring. The damping ring is set between the spring seat and the return spring to provide additional damping effect to prevent the valve stem 320 from resonating after being impacted.

[0086] In summary, the present invention ensures smooth flow of gas in the channel and effectively optimizes the flow path of gas by providing a transversely penetrating air passage 313 in the inlet section 310, configuring two circular cavities with a small outer portion and a large inner portion, and configuring a support plate 316 with flow channel holes. This design can reduce the resistance and vortex of gas during the flow process, thereby improving the flow efficiency of gas and the performance of the valve.

[0087] At the same time, the design of the support plate 316 not only realizes the segmented control of the gas in the channel, but also provides stable support and guidance for the valve stem 320 and the return spring through the conical central orifice.

[0088] The present invention also provides a pressure measuring threaded hole 317 on the side of the middle section of the inlet section 310 block, which is connected to the gas channel and can be conveniently connected to the inlet pressure gauge 110 to measure the gas pressure at the inlet in real time.

[0089] The above design helps to improve the accuracy and reliability of air pressure measurement, thereby better controlling the opening and closing of valves and the flow of gas.

[0090] The valve stem 320 is designed with a multi-step rotating body structure. The main body is a columnar structure with the outer periphery cut into a polygon, which not only retains the guide position but also serves as a fluid channel, making the movement of the valve stem 320 in the air passage 313 more stable.

[0091] In addition, the present invention designs one end of the valve stem 320 to be conical and a return spring is installed at the other end, and a damping ring is arranged between the spring seat and the return spring. The return spring and the damping ring cooperate with each other to provide additional support and damping effects for the valve stem 320, while realizing precise control and automatic return of the valve stem 320. This design helps to prevent resonance of the valve stem 320 and improve the stability and reliability of the system.

[0092] The diffuser 400 includes a diffuser 410, such as Figure 8 As shown, a diffusion chamber 416 is provided in the diffuser 410 , and an extended valve stem 440 , a support ring 430 and a valve plate 420 are arranged in the diffusion chamber 416 . The extended valve stem 440 is installed on the support ring 430 and can slide axially along the support ring 430 .

[0093] The diffuser 410 has a special-shaped column with a through-cavity in the center, a square flange at one end, and a block 412 with a convex edge at the other end, connected by a column in the middle.

[0094] like Figure 8 As shown, the center of the square flange is a multi-step cavity 414 , the end of the block 412 is provided with a central pipe thread hole 415 , and the bottom of the pipe thread hole 415 is a diffusion cavity 416 .

[0095] The small holes at the bottom of the multi-step concave cavity 414 are connected to the diffusion cavity 416 , and a tapered transition is provided at the bottom of the diffusion cavity 416 .

[0096] A transverse flange 417 is provided in the middle of a side surface of the block body 412, a vent hole 214 is provided in the center of the transverse flange 417, the vent hole 214 is connected with the bottom hole of the pipe threaded hole 415, connecting threaded holes are symmetrically provided on both sides of the vent hole 418 of the transverse flange 417, and a sealing groove can be provided at the opening of the vent hole 418.

[0097] The valve plate 420 has a convex cone-shaped end with a central small hole and an inverted slope at the center of the front end. The valve plate 420 is placed in the double-step concave cavity at the front end of the diffuser 410.

[0098] The support ring 430 is placed in the diffusion chamber 416, and the extended valve stem 440 passes through the support ring 430 and abuts against the valve stem 320 of the valve inlet group 300. The extended valve stem 440 pushes the valve stem 320 to move and thus controls the opening of the center hole of the valve plate 420 to throttle and reduce pressure.

[0099] The support ring 430 is a disk with a central through hole and a through channel on the periphery. The outer circumferential surface of the disk is threadedly connected to the pipe thread hole 415 in the diffuser 410, and one is provided at the front and the back.

[0100] The extended valve stem 440 is in the shape of a round rod, with a disc head provided at one end, which cooperates with the central hole of the support ring 430 and is placed in the center of the support ring 430 .

[0101] As an optimization, a thermal insulation pad 450 is set at the connection between the heat sink and the valve body 210. The thermal insulation pad 450 is a square sealing gasket that matches the side with holes of the block 412 above the diffuser 410. A hole is opened in the center, and a sealing groove can be set at the hole mouth to place a sealing ring. Screw holes are symmetrically set on the left and right sides of the center hole.

[0102] The present invention provides a diffuser 410 and a diffusion cavity 416 therein, which helps to uniformly diffuse and flow the gas and improve the uniformity of gas distribution. The taper transition design at the bottom of the diffusion cavity 416 can further promote the smooth flow of the gas and reduce the flow resistance.

[0103] The present invention also adopts a combined design of an extended valve stem 440, a support ring 430 and a valve plate 420, so that the opening of the center hole of the valve plate 420 can be accurately controlled by pushing the valve stem 320, thereby realizing flexible adjustment of the gas flow. This design helps to meet the gas flow requirements under different working conditions and improve the adaptability and flexibility of the system.

[0104] The present invention further designs the middle outer surface of the diffuser 410 to have heat dissipation fins 413, which helps to increase the heat dissipation area, improve the heat dissipation efficiency and quickly absorb external heat, ensuring that the system can remain stable when running under high load. As an optimization solution, heat dissipation fins 413 can also be set on other sides of the block body 412 to further enhance the heat dissipation effect.

[0105] At the same time, the design of the diffuser 410 takes into account the convenience of installation, such as the provision of the square flange and the pipe threaded hole 415, so that the diffuser 400 can be easily connected and fixed with other components. The design of the support ring 430 and the extended valve stem 440 is also convenient for disassembly and replacement, which is conducive to the maintenance and maintenance of the system.

[0106] In summary, the present invention achieves uniformity of gas flow, flexible adjustment of gas flow, enhanced heat dissipation performance, improved sealing and connection reliability, and convenience of installation and maintenance by optimizing the structure and function of the diffuser 400. These technical effects help to improve the performance and stability of the entire system and meet the needs of different application scenarios.

[0107] In order to further enhance the heat dissipation effect, the present invention provides an outlet connector 460 at the outlet of the diffusion chamber 416. The outlet connector 460 is a three-way threaded pipe connector with an external heat dissipation fin, having an inlet male thread and at least one outlet female threaded hole. An outlet female threaded hole provided on one side of the outlet connector 460 is threadedly connected to an outlet pressure gauge 120 for monitoring the gas pressure at the outlet.

[0108] As an optimization, the heat dissipation fins on the outside of the air outlet connector 460 significantly increase the heat dissipation area, which helps to dissipate the heat generated inside the diffuser 400 to the surrounding environment more quickly, thereby further enhancing the rapid heat exchange capability.

[0109] The gas outlet connector 460 adopts a three-way threaded pipe connector design, which is not only convenient for connection with other gas pipelines or equipment, but also realizes flexible gas flow control through the setting of the inlet male thread and the outlet female thread hole.

[0110] The present invention has an outlet pressure gauge 120 threadedly connected to the outlet female threaded hole provided on one side of the outlet connector 460, so that the user can conveniently monitor the gas pressure at the outlet, providing an important basis for monitoring and adjusting the system.

[0111] Furthermore, the present invention can timely discover abnormalities or potential problems in the system by real-time monitoring of the outlet gas pressure, and take corresponding measures to deal with them, thereby improving the reliability and safety of the system.

[0112] In addition, the design of the gas outlet connector 460 takes into account the requirements of various connection methods and gas flow directions, so that the system can be flexibly configured and adjusted according to different application scenarios.

[0113] The valve body assembly 200 is disposed on the diffuser 400 and connected to the diffuser 400. The valve body assembly 200 includes a valve body 210 and a crank arm 220.

[0114] like Fig. 9 As shown, the valve body 210 is a disc-shaped valve body 210, the center of the upper end of the valve body 210 is a concave diaphragm cavity 211, and the outer end surface of the concave diaphragm cavity 211 is a sealing end surface 219. The outer surface of the valve body 210 is provided with an external thread 212 for connecting the valve cover assembly 500.

[0115] A vent hole 214 penetrating the valve body 210 is disposed at one side of the bottom of the diaphragm cavity 211 of the valve body 210 , and screw holes 215 are symmetrically disposed on the left and right sides of the vent hole 214 , and sealing grooves may be disposed at the openings of the screw holes.

[0116] A pin shaft groove 216 is arranged outside the vent hole 214 and parallel to the left and right screw holes, and a crank arm 220 groove 217 is arranged in the middle of the pin shaft groove to accommodate the hinge support boss of the crank arm 220 .

[0117] A boss 218 is also provided at the bottom center of the diaphragm cavity 211, and a reset spring 230 is installed on the boss 218. The reset spring 230 is sleeved outside the boss 218 provided at the center of the valve body 210 and is used to reset the crank arm 220 and the valve stem 320. The height of the boss 218 can limit the swing angle of the crank arm 220.

[0118] like Fig.10 As shown, the crank arm 220 includes a pin shaft 221 and a right angle arm 222, wherein the pin shaft 221 is used to connect and support the right angle arm 222. The pin shaft 221 is inserted into a hinge hole 227 of the right angle arm 222, so that the right angle arm 222 can rotate around the pin shaft 221.

[0119] The right-angle arm 222 includes an active arm 223 and a driven arm 224, and the active arm 223 and the driven arm 224 of the right-angle arm 222 form an angle of 90°. A protruding arc 225 is provided at the ends of the active arm 223 and the driven arm 224, and a hinge support 226 is provided at a right angle on the driven arm 224, and a hinge support hole 227 is provided at the center of the hinge support 226, and a pin shaft 221 is inserted into the hinge support hole 227 of the right-angle arm, so that the right-angle arm can rotate around the pin shaft 221.

[0120] like Figure 4 , Fig.11 As shown, the driven arm 224 of the right-angle arm 222 is inserted into the vent hole 214 of the valve body 210, and the right-angle arm 222 is installed at the pin groove 216 on the valve body 210 through the pin 221, and the pin 221 is fixed by the screw 240; one end of the driven arm 224 of the right-angle arm 222 abuts against the extended valve stem 440, and the lower side of the active arm 223 of the right-angle arm 222 abuts against the upper end of the return spring 230.

[0121] During operation, when high-pressure gas enters the diffuser 400 through the valve inlet assembly 300, the gas is throttled and decompressed by the gap between the conical surface of the valve stem 320 and the central opening of the valve plate 420, and the diffuser 400 dissipates heat (cools).

[0122] The valve body assembly 200 can convert the up-and-down movement of the diaphragm assembly 510 into the left-and-right movement of the driving valve stem 320 through the design of the disc-shaped valve body 210 and the crank arm 220. This realizes direct control of the valve opening and ensures the effective operation of the system. The outlet pressure gauge 120 is provided so that the operator can monitor the outlet gas pressure in real time, thereby making timely adjustments to ensure the stability of the system pressure.

[0123] A boss is provided at the bottom center of the diaphragm cavity 211 of the valve body 210, and a reset spring 230 is sleeved thereon. This design enables the crank arm 220 and the valve stem 320 to be quickly reset after the work is completed, thus ensuring the stability and reliability of the system. At the same time, the height of the boss can also limit the swing angle of the crank arm 220, further improving safety.

[0124] The valve cover assembly 500 is connected to the valve body assembly 200 and is used to adjust and control the output pressure of the high-pressure gas. The valve cover assembly 500 is arranged above the valve body assembly 200 and includes a diaphragm assembly 510, a pressure regulating spring 520 and a knob assembly 530.

[0125] The lower center of the diaphragm assembly 510 abuts against the arc 225 on the active arm 223 of the crank arm 220 in the valve body assembly 200, thereby compressing the return spring 230 during installation. The valve cover and knob assembly 530 are fixedly screwed onto the valve body 210, so that the diaphragm of the diaphragm assembly 510 is tightly pressed against the sealing end surface 219 of the valve body 210, thereby achieving a sealing effect.

[0126] The pressure regulating spring 520 of the valve cover assembly 500 is adjusted through the knob assembly 530 to drive the diaphragm assembly 510 to move downward, and then the opening between the valve plate 420 and the valve stem 320 is adjusted through the crank arm 220 and the valve stem 320 .

[0127] Based on the above description, the specific assembly process of the valve switch assembly 100, the valve body assembly 200 and the valve cover assembly 500 in the heat dissipation type pressure reducing valve for preventing gas condensation of the present invention is as follows:

[0128] First, the return spring, spring seat and damping ring are inserted into the outer side of the lower straight rod of the valve stem 320, and inserted into the circular cavity of the inlet section 310 from the flange end. The lower straight rod of the valve stem 320 is inserted into the central hole of the support plate 316 of the inlet section 310, and the spring seat and the damping ring cone base fall on the conical surface of the central hole of the support plate 316 to form the valve inlet assembly 300. The valve stem 320 is constrained in the circular cavity of the inlet section 310 and the central hole of the support plate 316, and can move axially.

[0129] The valve plate 420 is placed in the multi-step concave cavity 414 of the square flange end of the diffuser 410; the support ring 430 is placed in the diffusion cavity 416 of the diffuser 410, and is tightly fitted and fixed; the extended valve stem 440 is inserted into the center hole of the support ring 430 and can move axially. The air outlet joint 460 is screwed into the pipe threaded hole 415 of the diffuser 410. The sealing ring is placed in the air vent 214 of the diffuser 410 and the sealing groove of the insulation pad 450; the insulation pad 450 is then placed on the transverse flange 417 of the diffuser 410, and the respective hole positions are aligned to form the diffuser 400.

[0130] Secondly, align the flange on the valve inlet assembly 300 with the flange of the diffuser 400, insert the central convex edge of the flange into the multi-step concave cavity 414 at the flange end, and press the valve plate 420 in the diffuser 400, the conical surface of the valve stem 320 abuts against the central orifice of the valve plate 420, compress the reset spring, and give a sealing force to the contact surface between the conical surface of the valve stem 320 and the valve plate 420. The conical surface of the valve stem 320 can provide greater sealing force like a wedge, and improve the sealing performance of the valve port. The conical tip of the valve stem 320 abuts against the end of the extended valve stem 440, and the diffuser 400 and the valve inlet assembly are assembled into one by screws to form the valve switch assembly 100.

[0131] The return spring 230 is sleeved on the outside of the boss described in the valve body 210, the sealing ring is sleeved into the sealing groove of the screw hole of the valve body 210, the driven arm 224 of the crank arm 220 is inserted into the vent hole 214 of the valve body 210, the pin 221 on the crank arm 220 is placed on the bottom of the pin groove of the valve body 210, and the lower side of the active arm 223 of the crank arm 220 abuts against the upper end of the return spring 230. The screw 240 is inserted into the screw hole of the valve body 210 to press the two ends of the pin 221 to form the valve body assembly 200. Next, align the vent hole 214 and the screw hole of the valve body 210 in the valve body assembly 200 with the vent hole 214 and the threaded hole of the diffuser 410 in the diffuser 400, insert the follower arm 224 in the valve body assembly 200 into the vent hole 214 of the diffuser section, and the arc 225 on the follower arm 224 abuts against the end of the extended valve stem 440 in the valve switch assembly 100. Tighten the screw 240 to fix the valve body assembly 200 and the diffuser 400 together.

[0132] Finally, place the diaphragm assembly 510 on the upper sealing end surface 219 of the valve body 210, the lower center of the diaphragm assembly 510 abuts against the arc 225 on the active arm 223 of the crank arm 220, compress the reset spring 230, place the pressure regulating spring 520 on the diaphragm assembly 510, cover the valve cover and the knob assembly 530, screw it on the valve body 210, and press the diaphragm of the diaphragm assembly 510 against the sealing end surface 219 of the valve body 210 for sealing.

[0133] The air inlet pressure gauge is installed in the pressure measuring threaded hole 317 of the inlet section 310, and the air outlet pressure gauge is installed in the side threaded hole of the air outlet connector 460, forming a new type of heat dissipation pressure reducing valve of the present invention.

[0134] In summary, if Fig.12 As shown, the working principle of the heat dissipation pressure reducing valve for preventing gas condensation of the present invention is as follows:

[0135] The inlet of the pressure reducing valve is connected to a high-pressure gas source, and the gas source enters the air passage 313 of the inlet section 310 through the air passage 313 in the inlet section 310. At this time, the outlet pressure has not been set, and the conical surface of the valve stem 320 contacts the central orifice of the valve plate 420, closing the gas passage and preventing gas output.

[0136] When the output pressure is to be set, the knob on the knob assembly 530 is turned to compress the pressure regulating spring 520 to drive the diaphragm assembly 510 to move downward. The diaphragm assembly 510 abuts against the active arm 223 through the arc 225 of the active arm 223 to drive the active arm 223 to rotate downward, thereby driving the driven arm 224 to rotate counterclockwise.

[0137] The driven arm 224 rotates counterclockwise to drive the driven arm 224 to rotate, and abuts against the extended valve stem 440 through the arc 225 above, driving the extended valve stem 440 to move rightward, and the extended valve stem 440 then abuts against the valve stem 320 through it, pushing the valve stem 320 to move rightward.

[0138] The movement of the valve stem causes the conical surface of the valve stem 320 to disengage from the contact with the central orifice of the valve plate 420, opening a small gap, and the imported high-pressure gas is throttled through the gap, enters the diffusion chamber 416 to expand and reduce pressure, and then passes through the channel around the support ring 430, enters the gas outlet connector 460, and is output from the outlet of the pressure reducing valve.

[0139] When the high-pressure gas expands and reduces pressure, it does work externally, reduces internal energy, and lowers temperature. The heat dissipation fins 413 outside the diffuser 410 absorb heat from the atmosphere, preventing the inlet section 310 from being cooled by the absorbed heat and preventing condensation from occurring in the inlet section 310, thereby ensuring the normal operation of the pressure reducing valve. The heat dissipation fins 319 on the inlet section 310 can also absorb heat from the atmosphere to prevent condensation from occurring.

[0140] At the same time, the gas that expands and decompresses after entering the diffusion chamber 416 also enters the diaphragm chamber 211 through the vent hole 214. The decompressed gas acts on the bottom of the diaphragm assembly 510, driving the diaphragm assembly 510 to move upward, forming a dynamic balance with the force of the compressed pressure-regulating spring 520.

[0141] When the outlet pressure increases, the diaphragm assembly 510 is pushed upward, the return spring 230 and the intake pressure drive the valve stem 320, extend the valve stem 440, and reset the right-angle arm. The gap between the conical surface of the valve stem 320 and the central orifice of the valve plate 420 is reduced, increasing throttling and reducing the outlet pressure.

[0142] On the contrary, when the outlet pressure decreases, the valve stem 320 is driven to open, increasing the gap between the conical surface of the valve stem 320 and the central opening of the valve plate 420, reducing throttling and increasing the outlet pressure. Finally, the outlet pressure and the compressed pressure regulating spring 520 force reach a dynamic balance and stabilize at the set pressure, achieving the purpose of pressure reduction.

[0143] The inlet pressure gauge 110 is connected to the inlet pressure through the pressure measuring threaded hole 317, and the outlet pressure gauge 120 is connected to the outlet pressure through the three-way threaded hole of the outlet joint 460, so as to realize the inlet and outlet pressure monitoring.

[0144] Embodiment 2

[0145] like Fig.13 As shown, the difference between this embodiment and the first embodiment is that the connecting screw 240 between the valve body assembly 200 and the valve switch assembly 100 is externally arranged to facilitate the disassembly and maintenance of the switch assembly, and a screw 241 is provided to fix the pin 221 of the crank arm 200. Other technical features are the same as those of the first embodiment and are not described in detail here.

[0146] In summary, the present invention is not limited to the above-mentioned embodiments, but can be modified and changed in various ways according to design requirements and other factors within the scope of the attached claims or their equivalents, and the scope of the present invention is intended to cover such modifications and changes. For example, changes in the shape of the inlet section, changes in the shape and length of the diffuser, changes in the right-angle arm, valve stem, valve plate, changes in the valve cover assembly, changes in the position and installation direction of the inlet and outlet ports, and other changes and other equivalent designs all belong to the protection scope of the present invention.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0148] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it; when the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A heat dissipation pressure reducing valve for preventing gas condensation, comprising a valve body assembly, a valve switch assembly and a valve cover assembly, characterized in that: The valve body assembly includes a valve body and a crank arm; the valve cover assembly includes a diaphragm assembly, a pressure regulating spring and a valve cover; the valve cover assembly is connected to the upper part of the valve body assembly, and is used to adjust the output pressure of the high-pressure gas and stabilize the output pressure within a set range; wherein the crank arm of the valve body assembly can swing, and is used to convert the up-and-down movement of the diaphragm assembly into left-and-right movement; The valve switch group includes a valve inlet group and a diffuser, which adopts a split structure with the valve body assembly, with a heat insulation pad in the middle for heat insulation, and is connected to the lower side of the valve body assembly by screws. The valve inlet group and the diffuser are connected in series to reduce the energy conduction between them; a gas channel is set between the valve inlet group and the diffuser, and the gas channel connects the valve inlet group and the diffuser; When high-pressure gas enters the diffuser through the valve inlet group, throttling and decompression are performed, and the diffuser decelerates and dissipates heat for the decompressed gas.

2. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 1, characterized in that: A diaphragm cavity is provided in the valve body of the valve body assembly, and a pin groove and a vent hole penetrating the valve body are provided on one side of the bottom of the valve body; The crank arm comprises a pin shaft and a right-angle arm, wherein the pin shaft is used to connect and support the right-angle arm; the pin shaft is inserted into the hinge hole of the right-angle arm so that the crank arm can rotate around the pin shaft; The right-angle arm includes an active arm and a passive arm. The passive arm of the right-angle arm is inserted into the vent hole of the valve body, and the right-angle arm is installed at the pin groove on the valve body through a pin. One end of the passive arm of the crank arm abuts against the extended valve stem, and the lower side of the active arm of the right-angle arm abuts against the upper end of the reset spring.

3. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 2, characterized in that: The active arm and the driven arm of the right-angle arm form an included angle of 90°.

4. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 2, characterized in that: A boss is also provided at the bottom center of the diaphragm cavity, and a reset spring is installed on the boss. The reset spring is sleeved outside the boss provided at the center of the valve body and is used for resetting the crank arm and the valve stem.

5. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 1, characterized in that: The valve inlet assembly includes an inlet section, a valve stem, and a spring assembly; The center of the inlet section is provided with an air duct along its axial direction, and the middle section of the air duct is provided with a support plate with a center hole; One end of the valve stem is set to be conical; the other end is installed with a spring assembly; the spring assembly is installed to match the center hole of the support plate; The valve stem is installed in the air passage at the center of the inlet section, and the valve stem can move axially along the air passage.

6. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 5, characterized in that: A pressure measuring threaded hole is arranged on the side of the inlet section and is connected with the gas channel.

7. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 1, characterized in that: The diffuser comprises a diffuser, and a diffusion cavity is provided in the diffuser; An extended valve stem, a support ring and a valve plate are arranged in the diffusion chamber; The extended valve stem is installed at the center of the support ring and can slide axially along the support ring; The valve plate is arranged in a multi-step concave cavity arranged near the inlet section of the diffusion cavity; The support ring is placed in the diffusion chamber, and the extended valve stem passes through the support ring and abuts against the valve stem of the valve inlet group. The extended valve stem pushes the valve stem to move and thus controls the opening between the valve stem and the valve plate, thereby throttling and reducing the pressure of the high-pressure gas.

8. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 7, characterized in that: One end of the diffuser is a square flange, the other end is a block with a convex edge, and the middle part is a column with heat dissipation fins on the outer surface; The center of the square flange is provided with a multi-step concave cavity, the center of the end of the block is provided with a pipe thread hole, and the multi-step concave cavity is connected with the diffusion cavity; A transverse flange is provided in the middle of one side of the block body, a vent hole is opened in the center of the transverse flange, and the vent hole is communicated with the pipe thread hole.

9. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 7, characterized in that: The valve plate is in the shape of a raised truncated cone with a central small hole at one end, an inverted slope at the center of the front end, and is placed in the double-step concave cavity at the front end of the diffuser.

10. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 7, characterized in that: The support ring is a disk with a central through hole and a through channel on the periphery. The outer circumferential surface of the disk cooperates with the diffusion cavity in the diffuser and is fixed in the diffusion cavity. One support ring is provided at the front and the back.

11. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 7, characterized in that: The extended valve stem is in the shape of a round rod, one end of which is provided with a disc head, which cooperates with the central hole of the support ring and is placed in the center of the support ring.

12. The heat dissipation pressure reducing valve for preventing gas condensation according to any one of claims 7 to 11, characterized in that: An air outlet joint is provided at the outlet of the diffusion chamber; The air outlet connector is a three-way threaded pipe connector with external heat dissipation fins, and has an inlet male thread and at least one outlet female threaded hole.

13. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 1, characterized in that: The pressure regulating spring of the valve cover assembly is adjusted through the knob assembly to change the position of the diaphragm assembly, and then the opening between the diaphragm assembly and the valve plate is adjusted through the crank arm and the valve stem.

14. The heat dissipation type pressure reducing valve for preventing gas condensation according to claim 1, characterized in that: It also includes an inlet pressure gauge and an outlet pressure gauge, which are respectively connected to the pressure measuring threaded hole and one side of the gas outlet joint to monitor the gas pressure at the inlet and outlet.

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