Gas pressure reducing structure and gas pressure reducing valve with same

Abstract

The invention discloses a gas pressure reduction structure which comprises a pressure reduction cylinder, a gas flow channel is axially formed in the cylinder wall of the pressure reduction cylinder, a gas inlet hole is formed in the inner side, corresponding to the gas flow channel, of the cylinder wall of the pressure reduction cylinder, a gas outlet hole is formed in the outer side, corresponding to the gas flow channel, of the cylinder wall of the pressure reduction cylinder, and the hole diameter of the gas outlet hole is decreased in the gas outflow direction to achieve throttling and pressure reduction; and the hedging assembly is assembled in the airflow channel so as to perform multi-stage hedging pressure reduction on airflow flowing from the air inlet hole to the air outlet hole in the airflow channel. The invention further discloses a gas pressure reducing valve with the gas pressure reducing structure. According to the gas pressure reducing structure and the gas pressure reducing valve with the gas pressure reducing structure, efficient pressure reduction can be achieved, and the stability of the outlet pressure can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of gas pressure reducing valves, and more particularly to a gas pressure reducing structure and a gas pressure reducing valve having the same. Background Art

[0002] In the field of traditional gas pressure reducing valve technology, pressure reducing valves, as a key control component, are widely used in various industrial gas transmission systems to reduce high-pressure gas to the required low-pressure level to ensure safe and efficient operation of the system. However, although the structure of traditional gas pressure reducing valves has been optimized and improved many times, they still have the following shortcomings:

[0003] 1) Traditional gas pressure reducing valves usually rely on the relative movement between the valve core and the valve seat to achieve the pressure reducing function. Although this design can achieve gas pressure reduction to a certain extent, it is often difficult to achieve the ideal pressure reducing effect due to its relatively simple pressure reducing mechanism. In practical applications, the outlet pressure after pressure reduction is often too high, which not only fails to meet the system's demand for low-pressure gas, but may also have an adverse effect on the stability and safety of the system.

[0004] 2) Due to the extremely high energy density and fluidity of high-pressure gas, traditional gas pressure reducing valves are prone to pressure fluctuations during the adjustment process. This is mainly due to the structural design of the pressure reducing valve and the limitations of the adjustment mechanism. During the adjustment process, the movement of the valve core is often affected by various factors such as gas flow and friction resistance, resulting in the inability to maintain a stable output of the outlet pressure. This pressure fluctuation will not only affect the normal operation of the system, but may also cause damage to other equipment in the system.

[0005] Therefore, how to provide a gas pressure reducing structure and a gas pressure reducing valve having the same that can reduce pressure efficiently and ensure stable outlet pressure is an issue that those skilled in the art urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a gas pressure reducing structure and a gas pressure reducing valve having the same, which are intended to reduce pressure efficiently and ensure the stability of outlet pressure.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A gas decompression structure, comprising:

[0009] A decompression cylinder, wherein an air flow channel is axially opened in the cylinder wall of the decompression cylinder, an air inlet hole is arranged on the inner side of the cylinder wall of the decompression cylinder corresponding to the air flow channel, and an air outlet hole is arranged on the outer side of the cylinder wall corresponding to the air flow channel, and the aperture of the air outlet hole decreases along the gas outflow direction to achieve throttling and decompression;

[0010] The counter-impact component is assembled in the air flow channel to perform multi-stage counter-impact pressure reduction on the air flow flowing from the air inlet to the air outlet in the air flow channel.

[0011] Through the above technical scheme, the present invention provides a gas decompression structure, which realizes multi-stage counter-pressure reduction through the counter-pressure component and realizes throttling decompression through the air outlet. The coordination of counter-pressure reduction and throttling decompression can effectively increase the kinetic energy loss in the gas flow, thereby greatly reducing the gas pressure and realizing efficient decompression.

[0012] Preferably, the hedging component includes a gas diversion chamber and a hedging plate, wherein there are two gas diversion chambers which are relatively opened on the inner and outer cylinder walls of the pressure reducing cylinder corresponding to the air flow channel, and a diversion hole 1 and a diversion hole 2 are opened in sequence on the cavity wall of the air flow channel corresponding to the gas diversion chamber along the air flow direction of the air flow channel; the hedging plate is located between the diversion hole 1 and the diversion hole 2 and its plate surface is vertically fixed to the inner wall of the air flow channel, and the air flow channel is divided into a first channel and a second channel, and the air flow in the first channel is offset against the plate surface of the hedging plate to achieve decompression, and then is divided into two groups of air flows which flow through the diversion hole 1 and the diversion hole 2 on both sides respectively and offset when entering the second channel to achieve further decompression.

[0013] Furthermore, the two ends of the hedging plate respectively seal the cavity walls of the gas diversion chambers corresponding to the two sides and divide the gas diversion chambers into a hedging chamber 1 and a hedging chamber 2, and a hedging hole connecting the hedging chamber 1 and the hedging chamber 2 is opened on the hedging plate;

[0014] Two diversion holes 1 are provided on the cavity wall of each side of the gas diversion chamber. The two diversion holes 1 are arranged along the airflow direction of the vertical airflow channel and are relatively located on both sides of the punch hole, so that the two groups of airflows flowing through the two diversion holes 1 are counter-charged before entering the punch hole to achieve re-decompression.

[0015] Furthermore, there may be two second flow diversion holes, which are arranged along the airflow direction perpendicular to the airflow channel and are relatively located on two sides of the punching hole.

[0016] Furthermore, the decompression cylinder includes a decompression cylinder 1 and a decompression cylinder 2, the air flow channel is opened in the cylinder wall of the decompression cylinder 1, and the cylinder wall of the decompression cylinder 1 corresponding to the air flow channel forms an inner wall and an outer wall, the air inlet is opened on the inner wall; and the outer wall is provided with an outflow hole;

[0017] The counter-pressure components are evenly arranged in 2n groups along the airflow direction of the airflow channel; two air inlet holes are arranged oppositely at the two ends of the airflow channel along its airflow direction; the outflow hole is located in the middle of the 2n groups of gas diversion chambers, so that the two groups of airflows entering the two air inlet holes respectively flow through the corresponding n groups of gas diversion chambers in sequence and then counter-pressure is achieved at the position of the corresponding outflow hole in the airflow channel to achieve re-decompression;

[0018] The second decompression cylinder is coaxially arranged on the outer side of the outer wall and is interference fit with the outer wall; the air outlet is opened on the cylinder wall of the second decompression cylinder and is communicated with the outflow hole.

[0019] Further, a gas circulation cavity 1 and a gas circulation cavity 2 are axially opened in the cylinder wall of the second decompression cylinder, and the second gas circulation cavity is located outside the first gas circulation cavity, and the first gas circulation cavity is connected with the outflow hole; a plurality of circulation holes are opened in the cylinder wall of the second decompression cylinder corresponding to the first gas circulation cavity and the second gas circulation cavity, and a plurality of gas outlet holes are opened on the cylinder wall of the second decompression cylinder corresponding to the outside of the second gas circulation cavity and are in communication with the second gas circulation cavity;

[0020] The plurality of flow holes and the plurality of air outlet holes are arranged in a staggered manner to achieve airflow counteraction and pressure reduction again.

[0021] Furthermore, the outflow hole and the air outlet hole both include a first outlet hole and a second outlet hole which are connected in sequence, and the aperture of the second outlet hole is smaller than the aperture of the first outlet hole to achieve throttling and pressure reduction.

[0022] Preferably, in order to facilitate the assembly of the above structure, the decompression cylinder 1 includes an inner cylinder and an outer cylinder arranged coaxially, the inner cylinder and the outer cylinder are interference-fitted, and the outer cylinder adopts a two-half symmetrical semi-ring columnar structure that can be opened and closed for assembly; an air flow channel is provided on the side wall surface of the inner cylinder close to the outer cylinder, and gas diversion grooves are provided on both sides of the side walls of the inner cylinder and the outer cylinder corresponding to the air flow channel, and a gas diversion chamber is formed by fixing a longitudinal partition at the opening of the gas diversion groove, and the diversion hole 1 and the diversion hole 2 are both provided on the longitudinal partition; the air inlet is provided on the side wall of the inner cylinder, and the outflow hole is provided on the side wall of the outer cylinder;

[0023] The second decompression cylinder includes an inner cylinder and an outer cylinder which are coaxially arranged and have an interference fit with each other. The inner cylinder is coaxially arranged on the outside of the outer cylinder and has an interference fit with the outer cylinder. A gas circulation groove 1 is provided on the wall surface of the inner cylinder close to the outer cylinder and the gas circulation groove 1 and the outer wall surface of the outer cylinder form a gas circulation cavity 1. A gas circulation groove 2 is provided on the wall surface of the inner cylinder close to the outer cylinder and the gas circulation groove 2 and the outer cylinder avoid forming a gas circulation cavity 2.

[0024] Furthermore, the longitudinal partition plate and the hedging plate are both made of PEEK material.

[0025] Preferably, the air flow channels, air inlet holes, air outlet holes and counter-impact components are evenly and correspondingly arranged in multiple rows along the annular direction of the cylinder wall.

[0026] Optionally, the airflow channel, air inlet holes, air outlet holes and counter-impact components may be arranged in 6 columns, each column is provided with 4 groups of gas diversion chambers, and each group of gas diversion chambers is two corresponding to both sides of the airflow channel.

[0027] The gas decompression structure disclosed in the present invention has the following process:

[0028] The gas enters the airflow channel through the air inlet, and is subjected to the first counterpressure reduction under the action of the counterplate; the gas then enters the counterpressure chamber one through the diverter hole one, and each counterpressure chamber one corresponds to two diverter holes one, and the two groups of airflows flowing through the two diverter holes one are subjected to the second gas counterpressure reduction when entering the counterpressure hole; the gas enters the counterpressure chamber two, and the two groups of airflows flowing out of the diverter holes two corresponding to both sides are subjected to the third gas counterpressure reduction when entering the second channel of the airflow channel;

[0029] The gas enters the next set of gas diversion chambers and repeats the above steps for multiple gas counterpressure decompressions;

[0030] The two groups of airflows entering the upper and lower air inlet holes respectively flow through the corresponding n groups of gas diversion chambers in sequence, and then perform gas counterpressure again at the position of the corresponding outflow hole in the air flow channel; and then enter the outflow hole;

[0031] The gas enters the gas flow chamber 1 through the outflow hole, enters the multiple flow holes, enters the gas flow chamber 2, and flows out through the multiple outlet holes. Since the multiple flow holes and the outlet holes are arranged in a staggered manner, the gas undergoes multiple flows to counteract the pressure reduction in the process, and finally flows out through the outlet holes.

[0032] In the above process, the gas is throttled and decompressed when passing through the outflow hole and the gas outlet hole.

[0033] The present invention also discloses a gas pressure reducing valve having the above-mentioned gas pressure reducing structure, further comprising:

[0034] A valve body, wherein the valve body has a valve cavity, an air inlet channel and an air outlet channel, and the air outlet port of the air inlet channel and the air inlet port of the air outlet channel are respectively opened on the cavity wall of the valve cavity;

[0035] The regulating and reducing pressure component includes multiple groups of regulating and reducing pressure components and each group of regulating and reducing pressure components includes a valve seat and a valve core. The multiple groups of valve seats are coaxially arranged from the inside to the outside and a reducing pressure space is reserved between the multiple groups of valve seats. The valve seat is fixed to the bottom wall of the valve cavity, and a flow port is opened thereon, and the flow port of the valve seat located in the center is connected to the gas outlet port of the gas inlet channel; the upper end of the valve core is elastically connected to the top plate of the valve cavity, and the lower end thereof is located in the corresponding flow port, and the outer wall thereof can form a gas flow channel with an adjustable flow width with the inner wall of the flow port; the gas flow channel is connected to the reducing pressure space, and the outlet of the gas flow channel located on the outermost side is connected to the gas inlet port of the gas outlet channel;

[0036] The gas decompression structures are multiple groups and are correspondingly assembled in the multiple groups of decompression spaces, and the decompression cylinders are fastened on the bottom walls of the decompression spaces.

[0037] Furthermore, the valve body includes a valve body and a valve cover, an open groove is opened at the upper end of the valve body, an air inlet channel and an air outlet channel are both opened on the valve body, and the air outlet port of the air inlet channel and the air inlet port of the air outlet channel are both opened at the bottom of the open groove; the valve cover is threadedly connected to the upper end of the valve body and forms a valve cavity with the open groove.

[0038] Furthermore, the valve seat and valve core corresponding to the regulating and reducing pressure component located in the center are both columnar, and the regulating and reducing pressure components coaxially arranged on the outside of the regulating and reducing pressure component in the center are both annular structures.

[0039] Through the above technical scheme, the present invention provides a gas pressure reducing valve, which makes the flow width of the gas flow channel adjustable through the relative movement between the valve seat and the valve core, thereby realizing throttling and pressure reduction. Combined with the gas pressure reducing structure, the gas pressure reducing valve can achieve efficient pressure reduction.

[0040] Preferably, it also includes a pressure-stabilizing component, which is divided into multiple groups and corresponds one-to-one with the regulating and reducing pressure components. The pressure-stabilizing component includes a support ring plate, a guide ring plate, an adjusting spring and a pressure-stabilizing gas channel body. The support ring plate is vertically fixed to the upper end of the valve core; the guide ring plate is sleeved on the outer side of the support ring plate and its upper end is fixed to the top plate of the valve cavity, and a pressure-stabilizing space is formed between the inner wall of the guide ring plate, the upper end surface of the support ring plate and the top plate of the valve cavity; the adjusting spring is located in the pressure-stabilizing space and its two ends are correspondingly abutted against the top plate and the upper end surface of the support ring plate; the pressure-stabilizing gas channel body is opened on the valve core, the inlet end of the pressure-stabilizing gas channel body is connected with the outlet of the gas flow channel, and the outlet end of the pressure-stabilizing gas channel body passes through the support ring plate and is connected with the pressure-stabilizing space, so as to adaptively adjust the flow width of the gas flow channel to achieve pressure stabilization.

[0041] Furthermore, the pressure stabilizing assembly also includes a supporting ring plate and two adjusting springs. The upper end of the pressure reducing cylinder is lower than the upper end of the valve core. The supporting ring plate is located in the pressure reducing space and its lower end is vertically fixed to the upper end of the pressure reducing cylinder. The lower end of the guide ring plate is fastened to the upper end face of the supporting ring plate. A pressure stabilizing space 2 is formed between the upper end face of the supporting ring plate 2, the inner wall of the guide ring plate and the lower end face of the supporting ring plate 1; the adjusting spring 2 is located in the pressure stabilizing space 2 and its two ends are fixed correspondingly to the lower end face of the supporting ring plate 1 and the upper end face of the supporting ring plate 2.

[0042] Furthermore, an annular support seat is sleeved on the outside of the outermost regulating and reducing pressure assembly, the bottom end of which is fixed to the bottom wall of the valve cavity, and the upper end surface of which is perpendicular and tightly connected to the corresponding guide ring plate to improve the stability of the corresponding pressure stabilizing assembly during adjustment.

[0043] Preferably, it also includes a pressure regulating component, which includes a push plate and a push rod. The push plate is located in a pressure stabilizing space 1 corresponding to the central valve core, and is slidably connected to the upper end of the pressure stabilizing space 1 and its lower end face abuts against an adjusting spring 1; the push rod is threadedly connected to the top plate of the valve cavity and its lower end is vertically fixed to the push plate, and its upper end passes through the top plate of the valve cavity and is located outside the valve cavity.

[0044] Furthermore, it also includes a screw cap, which is fixed to the external leakage end of the push rod.

[0045] The above technical solution can change the pre-tightening force of the push rod on the valve core by rotating the screw cap, thereby adjusting the initial setting pressure of the pressure reducing valve, so that the pressure reducing valve can adapt to different working pressure requirements.

[0046] The process of the gas pressure reducing valve disclosed by the present invention is as follows:

[0047] High-pressure gas enters from the air inlet channel, and enters the valve cavity through the flow port and gas flow channel of the regulating and decompression component in the middle, realizing throttling and decompression. Among them, one path of high-pressure gas enters the corresponding pressure-stabilizing space 1 through the pressure-stabilizing gas channel body of the valve core. Under the joint action of the high-pressure gas, regulating spring 1 and regulating spring 2, the flow width of the gas flow channel can be adaptively adjusted to realize pressure stabilization. Another path of high-pressure gas enters the gas decompression structure through the air inlet hole of the gas decompression structure to reduce gas pressure, flows out through the air outlet hole and enters the gas flow channel corresponding to the outer regulating and decompression component, repeats the cycle in sequence, and finally flows out through the air outlet channel. The gas pressure reducing valve can realize multiple gas pressure reduction-pressure stabilization coordination, and ensures the stability of gas pressure while reducing pressure efficiently.

[0048] It can be known from the above technical solutions that, compared with the prior art, the present invention discloses a gas decompression structure, which realizes multi-stage counter-pressure reduction through counter-pressure components, and realizes throttling pressure reduction through air outlet holes. The coordination of counter-pressure reduction and throttling pressure reduction can effectively increase the kinetic energy loss in gas flow, thereby greatly reducing gas pressure and realizing efficient pressure reduction. The present invention also discloses a gas pressure reducing valve having the gas decompression structure, which can adaptively adjust the flow width of the gas flow channel by adjusting the spring and the pressure-stabilizing gas channel body, realize adaptive adjustment and thus realize pressure stabilization, and combined with the setting of the gas decompression structure, ensures the stability of gas pressure while achieving efficient pressure reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0050] Figure 1 This is a structural schematic diagram of a gas decompression structure according to an embodiment of the present invention.

[0051] Figure 2 for Figure 1 Front cross-sectional view of .

[0052] Figure 3 for Figure 2 A top view of the gas decompression structure in the AA direction.

[0053] Figure 4 This is a schematic diagram of the distribution structure of the diversion hole 1, the diversion hole 2 and the punching hole provided by the present invention.

[0054] Figure 5 This is a schematic structural diagram of a gas pressure reducing valve according to Embodiment 2 of the present invention.

[0055] Figure 6 for Figure 5 Front cross-sectional view of .

[0056] Figure 7 This is a schematic structural diagram of the regulating and reducing pressure assembly provided by the present invention.

[0057] Figure 8 for Figure 7 Front cross-sectional view of .

[0058] Fig. 9 This is a schematic diagram of the assembly of the regulating and reducing pressure component and the voltage stabilizing component provided by the present invention.

[0059] in,

[0060] 1 is a decompression cylinder; 11 is a decompression cylinder 1; 111 is an air flow channel; 112 is an air inlet; 113 is an outlet; 1131 is a first outlet; 1132 is a second outlet; 12 is a decompression cylinder 2; 121 is an outlet; 122 is a gas circulation cavity 1; 123 is a gas circulation cavity 2; 124 is a circulation hole;

[0061] 2 is a counter-hedge component; 21 is a gas diversion chamber; 211 is a counter-hedge chamber 1; 212 is a counter-hedge chamber 2; 22 is a diversion hole 1; 23 is a diversion hole 2; 24 is a counter-hedge plate; 241 is a counter-hedge hole;

[0062] 3 is the valve body; 31 is the valve cavity; 32 is the air inlet channel; 33 is the air outlet channel;

[0063] 4 is a regulating pressure reducing assembly; 41 is a valve seat; 411 is a flow port; 42 is a valve core; 421 is a gas flow channel;

[0064] 5 is the decompression space;

[0065] 6 is a pressure stabilizing assembly; 61 is a supporting ring plate 1; 62 is a guide ring plate; 63 is an adjusting spring 1; 64 is a pressure stabilizing space 1; 65 is a supporting ring plate 2; 66 is an adjusting spring 2; 67 is a pressure stabilizing gas channel body; 68 is a pressure stabilizing space 2;

[0066] 7 is a pressure regulating assembly; 71 is a push plate; 72 is a push rod;

[0067] 8 is an annular support seat. DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] Embodiment 1

[0070] See attached Figure 1-4 , an embodiment of the present invention discloses a gas decompression structure, comprising:

[0071] A pressure reducing cylinder 1, wherein an air flow channel 111 is axially opened in the cylinder wall of the pressure reducing cylinder 1, an air inlet hole 112 is arranged on the inner side of the cylinder wall of the pressure reducing cylinder 1 corresponding to the air flow channel 111, and an air outlet hole 121 is arranged on the outer side corresponding to the air flow channel 111, and the aperture of the air outlet hole 121 decreases along the gas outflow direction thereof to realize throttling pressure reduction;

[0072] The counter-impact component 2 is assembled in the air flow channel 111 to perform multi-stage counter-impact pressure reduction on the air flow flowing from the air inlet 112 to the air outlet 121 in the air flow channel 111 .

[0073] In order to further optimize the above technical solution, the hedging component 2 includes a gas diversion chamber 21 and a hedging plate 24. The gas diversion chambers 21 are two and are relatively opened on the inner and outer cylinder walls of the pressure reducing cylinder 1 corresponding to the air flow channel 111. The gas diversion chamber 21 corresponds to the air flow channel 111. The cavity wall of the air flow channel 111 is provided with a diversion hole 1 22 and a diversion hole 23 in sequence along the air flow direction of the air flow channel 111; the hedging plate 24 is located between the diversion hole 1 22 and the diversion hole 23 and its plate surface is vertically fixed to the inner wall of the air flow channel 111. The air flow channel 111 is divided into a first channel and a second channel. The air flow in the first channel is offset against the plate surface of the hedging plate 24 to achieve decompression, and then is divided into two groups of air flows that flow through the diversion hole 1 22 and the diversion hole 23 on both sides respectively and offset when entering the second channel to achieve decompression again.

[0074] Specifically, the two ends of the hedging plate 24 respectively seal and penetrate the cavity walls of the corresponding gas diversion chambers 21 on both sides and divide the gas diversion chambers 21 into a hedging chamber 1 211 and a hedging chamber 2 212. The hedging plate 24 is provided with a hedging hole 241 connecting the hedging chamber 1 211 and the hedging chamber 2 212.

[0075] Two diversion holes 22 are provided on the cavity wall of each side gas diversion chamber 21. The two diversion holes 22 are arranged along the airflow direction of the vertical airflow channel 111 and are relatively located on both sides of the punch hole 241, so that the two groups of airflows flowing through the two diversion holes 22 are offset before entering the punch hole 241 to achieve further decompression.

[0076] Specifically, there may be two second flow diversion holes 23 , which are arranged along the airflow direction perpendicular to the airflow channel 111 and are located on two sides of the punching hole 241 .

[0077] In order to further optimize the above technical solution, the decompression cylinder 1 includes a decompression cylinder 11 and a decompression cylinder 12, an air flow channel 111 is opened in the cylinder wall of the decompression cylinder 11, and the cylinder wall of the decompression cylinder 11 corresponding to the air flow channel 111 forms an inner wall and an outer wall, an air inlet 112 is opened on the inner wall; and an outflow hole 113 is opened on the outer wall;

[0078] The counter-component 2 is evenly arranged in 2n groups along the airflow direction of the airflow channel 111; two air inlet holes 112 are provided and are arranged oppositely at the two ends of the airflow channel 111 along its airflow direction; the outflow hole 113 is located in the middle of the 2n groups of gas diversion chambers 21, so that the two groups of airflows entering the two air inlet holes 112 flow through the corresponding n groups of gas diversion chambers 21 in sequence and then counter-compact at the position of the airflow channel 111 corresponding to the outflow hole 113 to achieve decompression again;

[0079] The second decompression cylinder 12 is coaxially arranged outside the outer wall and has an interference fit with the outer wall; the air outlet 121 is opened in the cylinder wall of the second decompression cylinder 12 and is connected with the outflow hole 113.

[0080] In order to further optimize the above technical solution, a gas circulation cavity 122 and a gas circulation cavity 123 are axially opened in the cylinder wall of the second decompression cylinder 12, and the second gas circulation cavity 123 is located outside the first gas circulation cavity 122, and the first gas circulation cavity 122 is connected with the outflow hole 113; a plurality of circulation holes 124 are opened in the cylinder wall of the second decompression cylinder 12 corresponding to the first gas circulation cavity 122 and the second gas circulation cavity 123, and a plurality of gas outlet holes 121 are opened on the cylinder wall of the second decompression cylinder 12 corresponding to the outer side of the second gas circulation cavity 123 and are in communication with the second gas circulation cavity 123;

[0081] The plurality of flow holes 124 and the plurality of air outlet holes 121 are arranged in a staggered manner to correspond to each other so as to realize airflow counteraction and pressure reduction again.

[0082] Specifically, the outflow hole 113 and the air outlet hole 121 both include a first outlet hole 1131 and a second outlet hole 1132 which are connected in sequence, and the aperture of the second outlet hole 1132 is smaller than the aperture of the first outlet hole 1131 to achieve throttling and pressure reduction.

[0083] In order to further optimize the above technical solution, the decompression cylinder 11 includes an inner cylinder and an outer cylinder arranged coaxially, the inner cylinder and the outer cylinder are interference fit, and the outer cylinder adopts a two-half symmetrical semi-ring columnar structure that can be opened and closed for assembly; the inner cylinder is provided with an air flow channel 111 on the side wall surface close to the outer cylinder, and the inner cylinder and the outer cylinder side walls are provided with gas diversion grooves on both sides corresponding to the air flow channel 111, and a gas diversion chamber 21 is formed by fixing a longitudinal partition at the opening of the gas diversion groove, and the diversion hole 1 22 and the diversion hole 23 are both provided on the longitudinal partition; the air inlet 112 is provided on the side wall of the inner cylinder, and the outflow hole 113 is provided on the side wall of the outer cylinder;

[0084] The decompression cylinder 12 includes an inner cylinder and an outer cylinder which are coaxially arranged and have an interference fit with each other. The inner cylinder is coaxially arranged on the outside of the outer cylinder and has an interference fit with the outer cylinder. A gas circulation groove 1 is provided on the wall of the inner cylinder close to the outer cylinder, and the gas circulation groove 1 and the outer wall of the outer cylinder form a gas circulation cavity 122. A gas circulation groove 2 is provided on the wall of the inner cylinder close to the outer cylinder, and the gas circulation groove 2 and the outer cylinder avoid forming a gas circulation cavity 123.

[0085] Furthermore, the longitudinal partition plate and the hedging plate 24 are both made of PEEK material.

[0086] Preferably, the air flow channel 111 , the air inlet 112 , the air outlet 121 and the impact assembly 2 are evenly and correspondingly arranged in multiple rows along the annular direction of the wall of the pressure reducing cylinder 1 .

[0087] Optionally, the airflow channel 111 , the air inlet 112 , the air outlet 121 and the counter-component 2 may be arranged in 6 columns, each column being provided with 4 groups of gas diversion chambers 21 , and each group of gas diversion chambers 21 being two corresponding to the two sides of the airflow channel 111 .

[0088] The process of the gas decompression structure disclosed in the first embodiment is as follows:

[0089] The gas enters the airflow channel 111 through the air inlet 112, and is subjected to the first counterpressure reduction under the action of the counterplate 24; the gas then enters the counterchamber 1 211 through the diverter hole 1 22, and each counterchamber 1 211 corresponds to two diverter holes 1 22, and the two groups of airflows flowing through the two diverter holes 1 22 are subjected to the second gas counterpressure reduction when entering the counterhole 241; the gas enters the counterchamber 2 212, and the two groups of airflows flowing out of the corresponding diverter holes 23 on both sides are subjected to the third gas counterpressure reduction when entering the second channel of the airflow channel 111;

[0090] The gas enters the next set of gas diversion chambers 21 and repeats the above steps for multiple gas counterpressure decompressions;

[0091] The two groups of airflows entering the upper and lower air inlet holes 112 flow through the corresponding n groups of gas diversion chambers 21 in sequence, and then are subjected to gas counterpressure again at the position of the air flow channel 111 corresponding to the outlet hole 113; and then enter the outlet hole 113;

[0092] The gas enters the gas circulation chamber 122 through the outflow hole 113, then enters the plurality of circulation holes 124, then enters the gas circulation chamber 2 123, and then flows out through the plurality of outlet holes 121. Since the plurality of circulation holes 124 and the outlet holes 121 are arranged in a staggered manner, the gas undergoes multiple flows to counteract the pressure reduction in the process, and finally flows out through the outlet holes 121.

[0093] In the above process, the gas is throttled and decompressed when passing through the outflow hole 113 and the outlet hole 121 .

[0094] Embodiment 2

[0095] See attached Figure 5-9 The embodiment of the present invention discloses a gas pressure reducing valve, which includes the gas pressure reducing structure disclosed in the first embodiment, and further includes:

[0096] The valve body 3 has a valve cavity 31, an air inlet channel 32 and an air outlet channel 33, and the air outlet port of the air inlet channel 32 and the air inlet port of the air outlet channel 33 are respectively opened on the cavity wall of the valve cavity 31;

[0097] The regulating and reducing pressure component 4 is a plurality of groups of regulating and reducing pressure components 4, and each group of regulating and reducing pressure components 4 includes a valve seat 41 and a valve core 42. The plurality of groups of valve seats 41 are coaxially arranged from the inside to the outside, and a reducing pressure space 5 is reserved between the plurality of groups of valve seats 41. The valve seat 41 is fixed to the bottom wall of the valve cavity 31, and is provided with a flow port 411, and the flow port 411 of the valve seat 41 located at the center is connected to the gas outlet port of the gas inlet channel 32; the upper end of the valve core 42 is elastically connected to the top plate of the valve cavity 31, and the lower end thereof is located in the corresponding flow port 411, and the outer wall thereof can form a gas flow channel 421 with an adjustable flow width with the inner wall of the flow port 411; the gas flow channel 421 is connected to the reducing pressure space 5, and the outlet of the gas flow channel 421 located at the outermost side is connected to the gas inlet port of the gas outlet channel 33;

[0098] The gas decompression structures are multiple groups and are correspondingly assembled in the multiple groups of decompression spaces 5 . The decompression cylinder 1 is fastened to the bottom wall of the decompression space 5 .

[0099] Furthermore, the valve body 3 includes a valve body and a valve cover, an open groove is opened at the upper end of the valve body, an air inlet channel 32 and an air outlet channel 33 are both opened on the valve body, and the air outlet port of the air inlet channel 32 and the air inlet port of the air outlet channel 33 are both opened at the bottom of the open groove; the valve cover is threadedly connected to the upper end of the valve body and it and the open groove form a valve cavity 31.

[0100] Furthermore, the valve seat 41 and the valve core 42 corresponding to the regulating and decompressing component 4 located in the center are both columnar, and the regulating and decompressing components 4 coaxially arranged outside the columnar regulating and decompressing component 4 are both annular structures.

[0101] Preferably, it also includes a pressure stabilizing component 6, which is a plurality of groups and corresponds to the regulating and reducing pressure components 4 one by one. The pressure stabilizing component 6 includes a supporting ring plate 61, a guide ring plate 62, an adjusting spring 63 and a pressure stabilizing gas channel body 67. The supporting ring plate 61 is vertically fixed to the upper end of the valve core 42; the guide ring plate 62 is sleeved on the outer side of the supporting ring plate 61 and its upper end is fixed to the top plate of the valve cavity 31. The inner wall of the guide ring plate 62, the upper end surface of the supporting ring plate 61 and the top plate of the valve cavity 31 are fixed to each other. A pressure-stabilizing space 64 is formed; an adjusting spring 63 is located in the pressure-stabilizing space 64 and its two ends are correspondingly abutted against the upper end surfaces of the top plate and the supporting ring plate 61; a pressure-stabilizing gas channel body 67 is opened on the valve core 42, and the inlet end of the pressure-stabilizing gas channel body 67 is connected to the outlet of the gas flow channel 421, and the outlet end of the pressure-stabilizing gas channel body 67 passes through the supporting ring plate 61 and is connected to the pressure-stabilizing space 64, so as to adaptively adjust the flow width of the gas flow channel 421 to achieve pressure stabilization.

[0102] Furthermore, the pressure stabilizing assembly 6 also includes a support ring plate 65 and an adjusting spring 66. The upper end of the pressure reducing cylinder 1 is lower than the upper end of the valve core 42. The support ring plate 65 is located in the pressure reducing space 5 and its lower end is vertically fixed to the upper end of the pressure reducing cylinder 1. The lower end of the guide ring plate 62 is fastened to the upper end surface of the support ring plate 65. A pressure stabilizing space 68 is formed between the upper end surface of the support ring plate 65, the inner wall of the guide ring plate 62 and the lower end surface of the support ring plate 1 61; the adjusting spring 66 is located in the pressure stabilizing space 68 and its two ends are fixed correspondingly to the lower end surface of the support ring plate 1 61 and the upper end surface of the support ring plate 65.

[0103] Furthermore, an annular support seat 8 is sleeved on the outside of the outermost regulating and reducing pressure assembly 4, the bottom end of the annular support seat 8 is fixed to the bottom wall of the valve cavity 31, and the upper end surface thereof is perpendicular to and tightly connected to the corresponding guide ring plate 62 to improve the stability of the corresponding pressure stabilizing assembly 6 during the adjustment process.

[0104] Preferably, it also includes a pressure regulating component 7, which includes a push plate 71 and a push rod 72. The push plate 71 is located in the pressure-stabilizing space 64 corresponding to the central valve core 42, and is slidably connected to the upper end of the pressure-stabilizing space 64 and its lower end face abuts against the regulating spring 63; the push rod 72 is threadedly connected to the top plate of the valve cavity 31 and its lower end is vertically fixed to the push plate 71, and its upper end passes through the top plate of the valve cavity 31 and is located outside the valve cavity 31.

[0105] Furthermore, it also includes a screw cap, which is fixed to the external leakage end of the push rod 72.

[0106] The process of the gas pressure reducing valve disclosed in the second embodiment is as follows:

[0107] High-pressure gas enters from the air inlet channel 32, and enters the valve cavity 31 through the flow port 411 and the gas flow channel 421 of the regulating and decompression component 4 located in the middle, to achieve throttling and decompression. Among them, one high-pressure gas enters the corresponding pressure-stabilizing space 1 64 through the pressure-stabilizing gas channel body 67 of the valve core 42. Under the joint action of the high-pressure gas, the regulating spring 1 63 and the regulating spring 2 66, the flow width of the gas flow channel 421 can be adaptively adjusted to achieve pressure stabilization. Another high-pressure gas enters the gas decompression structure through the air inlet hole 112 of the gas decompression structure to reduce gas pressure, flows out through the air outlet hole 121 and enters the gas flow channel 421 corresponding to the outer regulating and decompression component 4, repeats the cycle in sequence, and finally flows out through the air outlet channel 33. The gas pressure reducing valve can achieve multiple gas pressure reduction-pressure stabilization coordination, and ensures the stability of gas pressure while reducing pressure efficiently.

[0108] According to the gas decompression structure designed by the present invention, multi-stage counter-pressure reduction is achieved through the counter-pressure component, and throttling pressure reduction is achieved through the air outlet. The coordination of counter-pressure reduction and throttling pressure reduction can effectively increase the kinetic energy loss in the gas flow, thereby greatly reducing the gas pressure and achieving efficient pressure reduction. The present invention also discloses a gas pressure reducing valve with the gas decompression structure, which can adaptively adjust the flow width of the gas flow channel by adjusting the spring and the pressure-stabilizing gas channel body, realize adaptive adjustment and thus achieve pressure stabilization. Combined with the setting of the gas decompression structure, the gas pressure stability is ensured while the pressure is efficiently reduced.

[0109] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0110] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas decompression structure, characterized in that: include: A decompression cylinder (1), wherein an air flow channel (111) is axially provided in a cylinder wall of the decompression cylinder (1), an air inlet hole (112) is provided on the inner side of the cylinder wall of the decompression cylinder (1) corresponding to the air flow channel (111), and an air outlet hole (121) is provided on the outer side of the cylinder wall corresponding to the air flow channel (111), and the aperture of the air outlet hole (121) decreases along the gas outflow direction thereof to achieve throttling decompression; A counter-pressure component (2) is installed in the air flow channel (111) to perform multi-stage counter-pressure reduction on the air flow flowing from the air inlet (112) to the air outlet (121) in the air flow channel (111).

2. A gas decompression structure according to claim 1, characterized in that: The counter-pressure assembly (2) comprises a gas diversion chamber (21) and a counter-pressure plate (24); the gas diversion chambers (21) are two and are arranged on the inner and outer cylinder walls of the decompression cylinder (1) corresponding to the air flow channel (111); the gas diversion chamber (21) has a first diversion hole (22) and a second diversion hole (23) arranged in sequence along the air flow direction of the air flow channel (111) on the cavity wall corresponding to the air flow channel (111); the counter-pressure plate (24) is provided with a first gas diversion hole (22) and a second gas diversion hole (23) arranged in sequence along the air flow direction of the air flow channel (111); 4) is located between the first diversion hole (22) and the second diversion hole (23) and its plate surface is vertically fixed to the inner wall of the airflow channel (111), the airflow channel (111) is divided into a first channel and a second channel, and the airflow in the first channel collides with the plate surface of the counter plate (24) to achieve pressure reduction, and then is divided into two groups of airflows that flow through the first diversion hole (22) and the second diversion hole (23) on both sides respectively, and collide with each other when entering the second channel to achieve pressure reduction again.

3. A gas decompression structure according to claim 2, characterized in that: The two ends of the counter plate (24) respectively seal and penetrate the cavity walls of the gas diversion chambers (21) corresponding to the two sides and divide the gas diversion chambers (21) into a counter chamber 1 (211) and a counter chamber 2 (212); the counter plate (24) is provided with a counter hole (241) connecting the counter chamber 1 (211) and the counter chamber 2 (212); Two diversion holes (22) are provided on the cavity wall of the gas diversion chamber (21) on each side. The two diversion holes (22) are arranged along the gas flow direction perpendicular to the gas flow channel (111) and are relatively located on both sides of the counter-punching hole (241), so that the two groups of gas flows flowing through the two diversion holes (22) are counter-punched before entering the counter-punching hole (241) to achieve re-decompression.

4. A gas decompression structure according to claim 2, characterized in that: The decompression cylinder (1) comprises a decompression cylinder 1 (11) and a decompression cylinder 2 (12); the air flow channel (111) is provided in the cylinder wall of the decompression cylinder 1 (11); and the cylinder wall of the decompression cylinder 1 (11) corresponding to the air flow channel (111) forms an inner wall and an outer wall; the air inlet (112) is provided on the inner wall; and an outflow hole (113) is provided on the outer wall; The counter-pressure components (2) are evenly arranged in 2n groups along the airflow direction of the airflow channel (111); two air inlet holes (112) are provided and are arranged oppositely at the two ends of the airflow channel (111) along its airflow direction; the outlet holes (113) are located in the middle of the 2n groups of gas diversion chambers (21), so that the two groups of airflows respectively entering the two air inlet holes (112) flow through the corresponding n groups of gas diversion chambers (21) in sequence and then counter-pressure is achieved at the position of the airflow channel (111) corresponding to the outlet holes (113) to achieve re-decompression; The second decompression cylinder (12) is coaxially arranged on the outside of the outer wall and is interference fit with the outer wall; the air outlet (121) is opened on the cylinder wall of the second decompression cylinder (12) and is connected to the outflow hole (113).

5. A gas decompression structure according to claim 4, characterized in that: A gas circulation chamber 1 (122) and a gas circulation chamber 2 (123) are axially opened in the cylinder wall of the second decompression cylinder (12), and the second gas circulation chamber (123) is located outside the first gas circulation chamber (122), and the first gas circulation chamber (122) is connected to the outflow hole (113); a plurality of circulation holes (124) are opened in the cylinder wall of the second decompression cylinder (12) corresponding to the first gas circulation chamber (122) and the second gas circulation chamber (123), and a plurality of the gas outlet holes (121) are opened on the cylinder wall of the second decompression cylinder (12) corresponding to the outside of the second gas circulation chamber (123) and are in communication with the second gas circulation chamber (123); The plurality of flow holes (124) and the plurality of air outlet holes (121) are arranged in a staggered manner corresponding to each other so as to achieve airflow counteraction and pressure reduction again.

6. A gas decompression structure according to claim 5, characterized in that: The outflow hole (113) and the air outlet hole (121) both comprise a first outlet hole (1131) and a second outlet hole (1132) which are connected in sequence, and the aperture of the second outlet hole (1132) is smaller than the aperture of the first outlet hole (1131) to achieve throttling and pressure reduction.

7. A gas pressure reducing valve, comprising a gas pressure reducing structure according to any one of claims 1 to 6, characterized in that: Also includes: A valve body (3), wherein the valve body (3) has a valve cavity (31), an air inlet channel (32) and an air outlet channel (33), and the air outlet port of the air inlet channel (32) and the air inlet port of the air outlet channel (33) are respectively opened on the cavity wall of the valve cavity (31); The regulating and decompression assembly (4) comprises a plurality of groups of regulating and decompression assemblies (4), each group of the regulating and decompression assemblies (4) comprises a valve seat (41) and a valve core (42), the plurality of groups of the valve seats (41) are coaxially arranged from the inside to the outside, and a decompression space (5) is reserved between the plurality of groups of the valve seats (41), the valve seat (41) is fixed to the bottom wall of the valve cavity (31), a flow opening (411) is provided thereon, and the flow opening (411) of the valve seat (41) located at the center is in contact with the air inlet passage ( The valve core (42) is connected to the outlet port of the valve cavity (32); the upper end of the valve core (42) is elastically connected to the top plate of the valve cavity (31), and the lower end thereof is located in the corresponding circulation port (411), and the outer wall thereof can form a gas circulation channel (421) with an adjustable circulation width between the outer wall and the inner wall of the circulation port (411); the gas circulation channel (421) is connected to the decompression space (5), and the outlet of the gas circulation channel (421) located at the outermost side is connected to the inlet port of the gas outlet channel (33); The gas decompression structure comprises multiple groups and is correspondingly assembled in multiple groups of the decompression spaces (5), and the decompression cylinder (1) is fastened to the bottom wall of the decompression space (5).

8. A gas pressure reducing valve according to claim 7, characterized in that: It also includes a pressure stabilizing assembly (6), wherein the pressure stabilizing assembly (6) is a plurality of groups and corresponds one to one with the regulating and reducing assembly (4), wherein the pressure stabilizing assembly (6) includes a supporting ring plate (61), a guiding ring plate (62), an regulating spring (63) and a pressure stabilizing gas channel body (67), wherein the supporting ring plate (61) is vertically fixed to the upper end of the valve core (42); the guiding ring plate (62) is sleeved on the outer side of the supporting ring plate (61) and its upper end is fixed to the top plate of the valve cavity (31), and the inner wall of the guiding ring plate (62), the upper end surface of the supporting ring plate (61) and the top plate of the valve cavity (31) are connected to each other. A pressure-stabilizing space (64) is formed between the valve core (42) and the pressure-stabilizing gas channel body (67). The regulating spring (63) is located in the pressure-stabilizing space (64) and its two ends are correspondingly abutted against the upper end surfaces of the top plate and the supporting ring plate (61). The pressure-stabilizing gas channel body (67) is opened on the valve core (42), and the inlet end of the pressure-stabilizing gas channel body (67) is connected to the outlet of the gas circulation channel (421). The outlet end of the pressure-stabilizing gas channel body (67) passes through the supporting ring plate (61) and is connected to the pressure-stabilizing space (64), so as to adaptively adjust the circulation width of the gas circulation channel (421) to achieve pressure stabilization.

9. A gas pressure reducing valve according to claim 8, characterized in that: The pressure stabilizing assembly (6) further comprises a second support ring plate (65) and a second regulating spring (66); the upper end of the pressure reducing cylinder (1) is lower than the upper end of the valve core (42); the second support ring plate (65) is located in the pressure reducing space (5) and its lower end is vertically fixed to the upper end of the pressure reducing cylinder (1); the lower end of the guide ring plate (62) is fastened to the upper end surface of the second support ring plate (65); the upper end surface of the second support ring plate (65), the inner wall of the guide ring plate (62) and the lower end surface of the first support ring plate (61) form a second pressure stabilizing space (68); the second regulating spring (66) is located in the second pressure stabilizing space (68) and its two ends are fixed to the lower end surface of the first support ring plate (61) and the upper end surface of the second support ring plate (65) respectively.

10. A gas pressure reducing valve according to claim 8, characterized in that: It also includes a pressure regulating component (7), which includes a push plate (71) and a push rod (72). The push plate (71) is located in the pressure stabilizing space (64) corresponding to the central valve core (42), and is slidably connected to the upper end of the pressure stabilizing space (64) and its lower end surface abuts against the regulating spring (63); the push rod (72) is threadedly connected to the top plate of the valve cavity (31) and its lower end is vertically fixed to the push plate (71), and its upper end passes through the top plate of the valve cavity (31) and is located outside the valve cavity (31).

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