Gas pressure reducing structure and gas pressure reducing valve having the same

Abstract

The application discloses a gas pressure reducing structure, comprising: a pressure reducing cylinder, an airflow channel is axially arranged in the cylinder wall of the pressure reducing cylinder, an air inlet hole is arranged on the inner side of the cylinder wall of the pressure reducing cylinder corresponding to the airflow channel, an air outlet hole is arranged on the outer side of the cylinder wall of the pressure reducing cylinder corresponding to the airflow channel, and the diameter of the air outlet hole is reduced along the gas outflow direction to realize throttling pressure reduction; and a counter-attack assembly is assembled in the airflow channel to perform multi-stage counter-attack pressure reduction on the airflow flowing from the air inlet hole to the air outlet hole in the airflow channel. The application further discloses a gas pressure reducing valve with the gas pressure reducing structure. The gas pressure reducing structure and the gas pressure reducing valve with the same can efficiently reduce pressure and ensure the stability of outlet pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas pressure reducing valve, more particularly to a gas pressure reducing structure and a gas pressure reducing valve with the same. BACKGROUND

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

[0003] 1) The traditional gas pressure reducing valve usually relies on the relative movement between the valve core and the valve seat to realize the pressure reducing function. Although this design can achieve the pressure reduction of gas to some extent, it is often difficult to achieve the ideal pressure reduction effect due to the relatively simple pressure reduction mechanism. In actual application, the outlet pressure after pressure reduction is often still too high, which not only cannot meet the demand of the system for low-pressure gas, but also may adversely affect the stability and safety of the system.

[0004] 2) Due to the high energy density and flowability of high-pressure gas, the traditional gas pressure reducing valve is prone to pressure fluctuation during adjustment. This is mainly caused by the limitation of the internal structure design and adjustment mechanism of the pressure reducing valve. During adjustment, the movement of the valve core is often affected by factors such as gas flow and frictional resistance, resulting in unstable output of the outlet pressure. Such pressure fluctuation not only affects the normal operation of the system, but also may cause damage to other equipment in the system.

[0005] Therefore, how to provide a gas pressure reducing structure capable of efficiently reducing pressure and ensuring the stability of the outlet pressure, and a gas pressure reducing valve with the same, is a problem that those skilled in the art need to solve. SUMMARY

[0006] Therefore, the present application provides a gas pressure reducing structure and a gas pressure reducing valve with the same, which can efficiently reduce pressure and ensure the stability of the outlet pressure.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] A gas pressure reducing structure, comprising:

[0009] a pressure reducing cylinder, an airflow passage is axially provided in the cylinder wall of the pressure reducing cylinder, a gas inlet hole is provided on the inner side of the cylinder wall of the pressure reducing cylinder corresponding to the airflow passage, and a gas outlet hole is provided on the outer side of the cylinder wall of the pressure reducing cylinder corresponding to the airflow passage, the diameter of the gas outlet hole decreases along the gas outflow direction to realize throttling pressure reduction;

[0010] The collision assembly is assembled in the airflow channel to perform multi-stage collision decompression on the airflow flowing from the gas inlet hole to the gas outlet hole in the airflow channel.

[0011] Through the technical scheme, the gas decompression structure is provided, multi-stage collision decompression is realized through the collision assembly, throttle decompression is realized through the gas outlet hole, and the collision decompression and the throttle decompression are matched, so that the kinetic energy loss in the gas flow is effectively increased to greatly reduce the gas pressure, and high-efficiency decompression is realized.

[0012] Preferably, the collision assembly comprises gas shunt chambers and a collision plate, the gas shunt chambers are two and are oppositely arranged on the inner side and the outer side of the cylinder wall of the decompression cylinder corresponding to the airflow channel, the cavity wall of the gas shunt chamber corresponding to the airflow channel is sequentially provided with a shunt hole one and a shunt hole two along the airflow direction of the airflow channel; the collision plate is located between the shunt hole one and the shunt hole two and the plate surface thereof is vertically fixed to the inner wall of the airflow channel, the airflow channel is divided into a first channel and a second channel, and the airflow collides with the plate surface of the collision plate in the first channel to realize decompression, and then the airflow is divided into two groups of airflow which respectively flow through the shunt hole one and the shunt hole two on the two sides and realize again decompression when entering the second channel.

[0013] Further, the two ends of the collision plate are respectively sealed and penetrate the cavity walls of the corresponding gas shunt chambers on the two sides and divide the gas shunt chambers into a collision chamber one and a collision chamber two, and the collision plate is provided with a collision hole which communicates the collision chamber one and the collision chamber two;

[0014] The cavity wall of each side gas shunt chamber is provided with two shunt hole ones, the two shunt hole ones are arranged along the airflow direction perpendicular to the airflow channel and are oppositely located on the two sides of the collision hole, so that the two groups of airflow flowing through the two shunt hole ones realize again decompression before entering the collision hole.

[0015] Further, the shunt hole two can be two and are arranged along the airflow direction perpendicular to the airflow channel and are oppositely located on the two sides of the collision hole.

[0016] Further, the decompression cylinder comprises a decompression cylinder one and a decompression cylinder two, the airflow channel is arranged in the cylinder wall of the decompression cylinder one, and the cylinder wall of the decompression cylinder one corresponding to the airflow channel forms an inner wall and an outer wall, and the gas inlet hole is arranged on the inner wall; the outer wall is provided with a flow-out hole;

[0017] The collision assembly is uniformly arranged with 2n groups along the airflow direction of the airflow channel; the gas inlet hole is provided with two and is oppositely arranged at the two ends of the airflow channel along the airflow direction thereof; the flow-out hole is located at the middle position of the 2n groups of gas shunt chambers, so that the two groups of airflow respectively entering the two gas inlet holes realize again decompression by sequentially flowing through the corresponding n groups of gas shunt chambers and colliding at the position of the flow-out hole in the airflow channel;

[0018] The second pressure reduction cylinder is coaxially arranged outside the outer wall and is in interference fit with the outer wall; and the gas outlet hole is arranged on the wall of the second pressure reduction cylinder and is in communication with the outflow hole.

[0019] Further, the wall of the second pressure reduction cylinder is axially provided with a gas flow cavity one and a gas flow cavity two, and the gas flow cavity two is located outside the gas flow cavity one; the wall of the second pressure reduction cylinder corresponding to the gas flow cavity one and the gas flow cavity two is provided with a plurality of flow holes, and a plurality of gas outlet holes are arranged on the wall of the second pressure reduction cylinder corresponding to the gas flow cavity two and are in flow communication with the gas flow cavity two.

[0020] The plurality of flow holes and the plurality of gas outlet holes are correspondingly arranged in a staggered manner to realize gas flow collision pressure reduction again.

[0021] Further, the outflow hole and the gas outlet hole each include a first outlet hole and a second outlet hole in sequence, and the aperture of the second outlet hole is smaller than the aperture of the first outlet hole, so as to realize throttling pressure reduction.

[0022] Preferably, in order to facilitate the assembly of the above structure, the first pressure reduction cylinder includes an inner cylinder and an outer cylinder arranged coaxially, the inner cylinder is in interference fit with the outer cylinder, and the outer cylinder adopts a symmetrical half-ring column structure with two halves that can be opened and closed for easy assembly; the inner cylinder is provided with a gas flow channel on the side wall surface close to the outer cylinder, the inner cylinder and the outer cylinder are oppositely provided with gas shunt grooves corresponding to the two sides of the gas flow channel, and a gas shunt chamber is formed by fixing a longitudinal partition plate at the opening of the gas shunt groove, the shunt holes one and two are each arranged on the longitudinal partition plate; the gas inlet hole is arranged on the side wall of the inner cylinder, and the outflow hole is arranged on the side wall of the outer cylinder.

[0023] The second pressure reduction cylinder includes an inner cylinder and an outer cylinder arranged coaxially, and the inner cylinder and the outer cylinder are in interference fit; the inner cylinder is coaxially arranged outside the outer cylinder and is in interference fit with the outer cylinder; the inner cylinder is provided with a gas flow groove one on the wall surface close to the outer cylinder, and the gas flow groove one and the outer wall surface of the outer cylinder form a gas flow cavity one; the inner cylinder is provided with a gas flow groove two on the wall surface close to the outer cylinder, and the gas flow groove two and the outer wall surface of the outer cylinder form a gas flow cavity two.

[0024] Further, the longitudinal partition plate and the collision plate are each made of PEEK material.

[0025] Preferably, the gas flow channel, the gas inlet hole, the gas outlet hole and the collision assembly are uniformly and correspondingly arranged in multiple rows along the annular direction of the wall.

[0026] Optionally, the gas flow channel, the gas inlet hole, the gas outlet hole and the collision assembly can be correspondingly arranged in 6 rows, and each row is correspondingly provided with 4 groups of gas shunt chambers, and each group of gas shunt chambers corresponds to two sides of the gas flow channel.

[0027] The gas pressure reduction structure disclosed in the application has the following process:

[0028] The gas enters the gas flow channel through the inlet hole, and is subjected to first gas collision and pressure reduction under the action of the collision plate; the gas enters the collision chamber I through the shunt hole I, each collision chamber I corresponds to two shunt holes I, and two groups of gas flows flowing through the two shunt holes I are subjected to second gas collision and pressure reduction when entering the collision hole; the gas enters the collision chamber II, and two groups of gas flows flowing out of the corresponding shunt holes II are subjected to third gas collision and pressure reduction when entering the second channel of the gas flow channel;

[0029] The gas enters the next group of gas shunt chambers and is subjected to multiple gas collision and pressure reduction according to the above steps;

[0030] Two groups of gas flows entering the upper and lower inlet holes in turn flow through the corresponding n groups of gas shunt chambers, and are subjected to gas collision and pressure reduction again at the position of the corresponding outlet hole of the gas flow channel; then the gas enters the outlet hole;

[0031] The gas enters the gas flow passage I through the outlet hole, then enters multiple flow-through holes, then enters the gas flow passage II, and then flows out through multiple gas outlet holes, because the multiple flow-through holes and the gas outlet holes are correspondingly staggered, the gas is subjected to multiple flow collision and pressure reduction in the process, and finally flows out through the gas outlet holes;

[0032] In the above process, the gas is subjected to throttling and pressure reduction when passing through the outlet hole and the gas outlet hole.

[0033] The application also discloses a gas pressure reduction valve with the gas pressure reduction structure.

[0034] The valve body has a valve cavity, an inlet channel and an outlet channel in the valve body, and the outlet port of the inlet channel and the inlet port of the outlet channel are arranged on the cavity wall of the valve cavity;

[0035] The adjusting and pressure reduction assembly is multiple groups, each group of the adjusting and pressure reduction assembly comprises a valve seat and a valve core, the multiple groups of valve seats are coaxially arranged from inside to outside, and a pressure reduction space is reserved between the multiple groups of valve seats, the valve seat is fixed to the bottom wall of the valve cavity, the valve seat is arranged at the center and has a flow-through port, the flow-through port of the valve seat in the center is in communication with the outlet port of the inlet channel, the upper end of the valve core is elastically connected to the top plate of the valve cavity, the lower end of the valve core is located in the corresponding flow-through port, and the outer wall of the valve core can form a gas flow-through channel with adjustable flow-through width between the inner wall of the flow-through port, the gas flow-through channel is in communication with the pressure reduction space, and the outlet of the gas flow-through channel located at the outermost side is in communication with the inlet port of the outlet channel;

[0036] The gas pressure reduction structure is multiple groups and is correspondingly assembled in the multiple groups of pressure reduction spaces, and the pressure reduction cylinder is fastened to the bottom wall of the pressure reduction space.

[0037] Further, the valve body comprises a valve body and a valve cover, an open groove is formed on the upper end of the valve body, the gas inlet channel and the gas outlet channel are both formed on the valve body, and the gas outlet port of the gas inlet channel and the gas inlet port of the gas outlet channel are both formed on the groove 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] Further, the valve seat and the valve core corresponding to the central adjusting and pressure reducing assembly are both columnar, and the adjusting and pressure reducing assemblies arranged coaxially outside the central adjusting and pressure reducing assembly are all annular structures.

[0039] Through the above technical scheme, the application provides a gas pressure reducing valve, the flow width of the gas flow channel can be adjusted through the relative movement between the valve seat and the valve core, thereby realizing throttling pressure reduction, and in combination with the gas pressure reducing structure, the high-efficiency pressure reduction of the gas pressure reducing valve can be realized.

[0040] Preferably, the application further comprises a plurality of pressure stabilizing assemblies corresponding to the adjusting and pressure reducing assemblies one by one, each pressure stabilizing assembly comprises a support ring plate 1, a guide ring plate, an adjusting spring 1 and a pressure stabilizing gas channel body, the support ring plate 1 is vertically fixed on the upper end of the valve core; the guide ring plate is sleeved outside the support ring plate 1 and the upper end thereof is fixed with the top plate of the valve cavity, the inner wall of the guide ring plate, the upper end surface of the support ring plate 1 and the top plate of the valve cavity form a pressure stabilizing space 1; the adjusting spring 1 is located in the pressure stabilizing space 1 and the two ends thereof abut against the top plate and the upper end surface of the support ring plate 1; the pressure stabilizing gas channel body is formed on the valve core, the inlet end of the pressure stabilizing gas channel body is communicated with the outlet of the gas flow channel, and the outlet end of the pressure stabilizing gas channel body penetrates through the support ring plate 1 and is communicated with the pressure stabilizing space 1, so as to adaptively adjust the flow width of the gas flow channel and realize pressure stabilization.

[0041] Further, the pressure stabilizing assembly further comprises a support ring plate 2 and an adjusting spring 2, the upper end of the pressure reducing cylinder is lower than the upper end of the valve core, the support ring plate 2 is located in the pressure reducing space and the lower end thereof is vertically fixed with the upper end of the pressure reducing cylinder, the lower end of the guide ring plate is fastened to the upper end surface of the support ring plate 2, the upper end surface of the support ring plate 2, the inner wall of the guide ring plate and the lower end surface of the support ring plate 1 form a pressure stabilizing space 2; the adjusting spring 2 is located in the pressure stabilizing space 2 and the two ends thereof are fixed with the lower end surface of the support ring plate 1 and the upper end surface of the support ring plate 2.

[0042] Further, an annular support seat is sleeved outside the outermost adjusting and pressure reducing assembly, the bottom end of the annular support seat is fixed with the bottom wall of the valve cavity, and the upper end surface thereof is vertically and tightly connected with the corresponding guide ring plate to improve the stability of the corresponding pressure stabilizing assembly during the adjusting process.

[0043] Preferably, the pressure regulating assembly further comprises a push plate and a push rod, the push plate is located in the corresponding pressure stabilizing space of the center valve core, is slidingly connected to the upper end of the pressure stabilizing space, and the lower end surface of the push plate is in abutment with the adjusting spring one; the push rod is screwedly connected to the top plate of the valve cavity, the lower end of the push rod is vertically fixed with the push plate, and the upper end of the push rod penetrates through the top plate of the valve cavity and is located outside the valve cavity.

[0044] Further, the screw cap is fixed to the outer leakage end of the push rod.

[0045] The above technical solution is provided, the pre-tightening force of the push rod on the valve core can be changed by rotating the screw cap, so that the initial set pressure of the pressure reducing valve is adjusted, and the pressure reducing valve can adapt to different working pressure requirements.

[0046] The process of the gas pressure reducing valve disclosed in the application is as follows:

[0047] The high-pressure gas enters the valve cavity through the gas inlet channel, the flow-through port of the intermediate regulating and reducing assembly, and the gas flow-through channel, and realizes throttling pressure reduction, wherein one way of the high-pressure gas enters the corresponding pressure stabilizing space one through the pressure stabilizing gas channel body of the valve core, and the flow-through width of the gas flow-through channel can be self-adaptively adjusted under the joint action of the high-pressure gas, the adjusting spring one and the adjusting spring two, so that pressure stabilization is realized; another way of the high-pressure gas enters the gas pressure reducing structure through the gas inlet hole of the gas pressure reducing structure, is reduced in pressure in the gas pressure reducing structure, flows out through the gas outlet hole and enters the corresponding gas flow-through channel of the outer regulating and reducing assembly, is sequentially and repeatedly circulated, and finally flows out through the gas outlet channel. The gas pressure reducing valve can realize multiple gas pressure reduction and pressure stabilization cooperation, efficiently reduces the pressure, and ensures the pressure stability of the gas.

[0048] According to the above technical solution, compared with the prior art, the application discloses a gas pressure reducing structure, realizes multi-stage pressure reduction through the counter-punch assembly, realizes throttling pressure reduction through the gas outlet hole, and cooperates the counter-punch pressure reduction and the throttling pressure reduction, so that the kinetic energy loss in the gas flow is effectively increased, the gas pressure is greatly reduced, and efficient pressure reduction is realized. The application further discloses a gas pressure reducing valve with the gas pressure reducing structure, the adjusting spring and the pressure stabilizing gas channel body are used to enable the gas flow-through channel to be self-adaptively adjusted in flow-through width, self-adaptive adjustment is realized, pressure stabilization is realized, and the gas pressure is stably ensured under efficient pressure reduction. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0050] Figure 1 A structure diagram of a gas pressure reducing structure according to an embodiment of the present application.

[0051] Figure 2 A front view of the gas pressure reducing structure. Figure 1

[0052] Figure 3 A top view of the gas pressure reducing structure in the A-A direction. Figure 2

[0053] Figure 4 A distribution structure diagram of the shunt hole one, the shunt hole two and the counter-bore provided by the present application.

[0054] Figure 5 A structure diagram of a gas pressure reducing valve according to an embodiment of the present application.

[0055] Figure 6 A front view of the gas pressure reducing valve. Figure 5

[0056] Figure 7 A structure diagram of an adjusting pressure reducing assembly provided by the present application.

[0057] Figure 8 A front view of the adjusting pressure reducing assembly. Figure 7

[0058] Figure 9 An assembly diagram of the adjusting pressure reducing assembly and the pressure stabilizing assembly provided by the present application.

[0059] Wherein,

[0060] 1 is a pressure reducing cylinder; 11 is a pressure reducing cylinder one; 111 is a gas flow passage; 112 is an air inlet hole; 113 is an outflow hole; 1131 is a first outflow hole; 1132 is a second outflow hole; 12 is a pressure reducing cylinder two; 121 is an air outlet hole; 122 is a gas flow passage one; 123 is a gas flow passage two; 124 is a flow passage hole;

[0061] 2 is a counter-bore assembly; 21 is a gas shunt chamber; 211 is a counter-bore chamber one; 212 is a counter-bore chamber two; 22 is a shunt hole one; 23 is a shunt hole two; 24 is a counter-bore plate; 241 is a counter-bore hole;

[0062] 3 is a valve body; 31 is a valve cavity; 32 is an air inlet passage; 33 is an air outlet passage;

[0063] 4 is an adjusting pressure reducing assembly; 41 is a valve seat; 411 is a flow passage; 42 is a valve core; 421 is a gas flow passage;

[0064] 5 is a pressure reducing space;

[0065] ​​​​6 is a pressure stabilizing assembly; 61 is a support ring plate one; 62 is a guide ring plate; 63 is an adjusting spring one; 64 is a pressure stabilizing space one; 65 is a support ring plate two; 66 is an adjusting spring two; 67 is a pressure stabilizing gas passage body; 68 is a pressure stabilizing space two;

[0066] 7 is a pressure adjusting 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 application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0069] Embodiment one

[0070] Referring to the accompanying drawings, Figures 1-4 The embodiment of the present application discloses a gas pressure reducing structure, which comprises:

[0071] A pressure reducing cylinder 1, an airflow passage 111 is axially arranged 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 airflow passage 111, an air outlet hole 121 is arranged on the outer side of the cylinder wall of the pressure reducing cylinder 1 corresponding to the airflow passage 111, and the diameter of the air outlet hole 121 decreases along the gas outflow direction to realize throttling pressure reduction.

[0072] A buttressing assembly 2 is assembled in the airflow passage 111 to perform multi-stage buttressing pressure reduction on the airflow flowing from the air inlet hole 112 to the air outlet hole 121 in the airflow passage 111.

[0073] In order to further optimize the above technical solution, the buttressing assembly 2 comprises a gas shunt chamber 21 and a buttressing plate 24, the gas shunt chamber 21 is two and oppositely arranged on the cylinder walls corresponding to the inner side and the outer side of the airflow passage 111 of the pressure reducing cylinder 1, the shunt holes one 22 and the shunt holes two 23 are sequentially arranged on the cavity walls of the gas shunt chamber 21 corresponding to the airflow passage 111 along the airflow direction of the airflow passage 111; the buttressing plate 24 is located between the shunt holes one 22 and the shunt holes two 23 and its plate surface is vertically fixed in the inner wall of the airflow passage 111, the airflow passage 111 is divided into a first passage and a second passage, the airflow in the first passage collides with the plate surface of the buttressing plate 24 to realize pressure reduction, and then the airflow is divided into two groups of airflow which respectively flow through the shunt holes one 22 and the shunt holes two 23 on both sides and realize pressure reduction again when entering the second passage.

[0074] Specifically, the two ends of the butt plate 24 respectively seal the cavity wall of the corresponding gas shunt chamber 21 on both sides and divide the gas shunt chamber 21 into butt chamber one 211 and butt chamber two 212, and the butt plate 24 is provided with a butt hole 241 communicating the butt chamber one 211 and the butt chamber two 212;

[0075] The cavity wall of each side gas shunt chamber 21 is provided with two shunt holes one 22, and the two shunt holes one 22 are arranged along the airflow direction perpendicular to the airflow channel 111 and located on the two sides of the butt hole 241, so that the two groups of airflows flowing through the two shunt holes one 22 are re-pressured by butt before entering the butt hole 241.

[0076] Specifically, the shunt hole two 23 can be two and arranged along the airflow direction perpendicular to the airflow channel 111 and located on the two sides of the butt hole 241.

[0077] In order to further optimize the above technical scheme, the pressure reduction cylinder 1 includes a pressure reduction cylinder one 11 and a pressure reduction cylinder two 12, the airflow channel 111 is provided in the cylinder wall of the pressure reduction cylinder one 11, and the cylinder wall of the pressure reduction cylinder one 11 corresponding to the airflow channel 111 forms an inner wall and an outer wall, and the inlet hole 112 is provided on the inner wall; the outer wall is provided with an outlet hole 113;

[0078] The butt assembly 2 is uniformly arranged with 2n groups along the airflow direction of the airflow channel 111; the inlet hole 112 is provided with two and arranged on the two ends of the airflow channel 111 along the airflow direction thereof; the outlet hole 113 is located at the middle position of the 2n groups of gas shunt chambers 21, so that the two groups of airflows entering the two inlet holes 112 respectively flow through the corresponding n groups of gas shunt chambers 21 in turn and are re-pressured by butt at the position of the outlet hole 113 corresponding to the airflow channel 111;

[0079] The pressure reduction cylinder two 12 is coaxially arranged outside the outer wall and is in interference fit with the outer wall; the outlet hole 121 is provided in the cylinder wall of the pressure reduction cylinder two 12 and is in communication with the outlet hole 113.

[0080] In order to further optimize the above technical scheme, the cylinder wall of the pressure reduction cylinder two 12 is axially provided with a gas flow cavity one 122 and a gas flow cavity two 123, and the gas flow cavity two 123 is located outside the gas flow cavity one 122, the gas flow cavity one 122 is in communication with the outlet hole 113; the pressure reduction cylinder two 12 is provided with a plurality of flow holes 124 corresponding to the cylinder wall between the gas flow cavity one 122 and the gas flow cavity two 123, and a plurality of outlet holes 121 are provided on the cylinder wall of the pressure reduction cylinder two 12 corresponding to the outer side of the gas flow cavity two 123 and in flow communication with the gas flow cavity two 123;

[0081] The plurality of flow holes 124 and the plurality of outlet holes 121 are correspondingly arranged in a staggered manner to realize re-pressuring by airflow butt.

[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 that are connected in sequence. The aperture of the second outlet hole 1132 is smaller than that of the first outlet hole 1131 to achieve throttling and pressure reduction.

[0083] To further optimize the above technical solution, the decompression cylinder 11 includes a coaxially arranged inner cylinder and outer cylinder. The inner cylinder and the outer cylinder have an interference fit, and the outer cylinder adopts a two-half symmetrical semi-circular columnar structure that can be opened and closed for easy assembly. An air flow channel 111 is defined on the side wall of the inner cylinder near the outer cylinder. Gas diversion grooves are defined on both sides of the inner and outer cylinder side walls corresponding to the air flow channel 111. A gas diversion chamber 21 is formed by fixing a longitudinal partition at the opening of the gas diversion groove. Diversion hole 12 and diversion hole 23 are both defined on the longitudinal partition. An air inlet 112 is defined on the side wall of the inner cylinder, and an outlet hole 113 is defined on the side wall of the outer cylinder.

[0084] The decompression cylinder 12 includes an inner cylinder and an outer cylinder arranged coaxially, and the inner cylinder and the outer cylinder are interference fit. The inner cylinder is coaxially arranged on the outside of the outer cylinder and is 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 2 123.

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

[0086] Preferably, the air flow channels 111 , the air inlet holes 112 , the air outlet holes 121 and the counter-pressure components 2 are evenly and correspondingly arranged in multiple rows along the annular direction of the wall of the decompression cylinder 1 .

[0087] Optionally, the air flow channel 111 , the air inlet 112 , the air outlet 121 and the counter-impact assembly 2 may be arranged in 6 columns, each column corresponding to 4 groups of gas diversion chambers 21 , and each group of gas diversion chambers 21 is two corresponding to both sides of the air flow channel 111 .

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

[0089] The gas enters the air flow channel 111 through the air inlet 112 and undergoes a first counterpressure reduction under the action of the counterplate 24. The gas then enters the counterchamber 1 211 through the diverter hole 1 22. Each counterchamber 1 211 corresponds to two diverter holes 1 22. The two groups of air flows flowing through the two diverter holes 1 22 undergo a second counterpressure reduction when entering the counterchamber 241. The gas enters the counterchamber 2 212. The two groups of air flows flowing out of the corresponding diverter holes 23 on both sides undergo a third counterpressure reduction when entering the second channel of the air flow channel 111.

[0090] The gas enters the next group of gas distribution chambers 21 and repeats the gas collision decompression according to the above steps;

[0091] The two groups of gas flows entering the upper and lower gas inlet holes 112 respectively flow through the corresponding n groups of gas distribution chambers 21 in turn, and then perform gas collision decompression again at the position of the corresponding outflow hole 113 of the gas flow channel 111; and then enter the outflow hole 113;

[0092] The gas enters the gas flow passage one 122 through the outflow hole 113, then enters the plurality of flow-through holes 124, then enters the gas flow passage two 123, and then flows out through the plurality of gas outlet holes 121. Since the plurality of flow-through holes 124 and the plurality of gas outlet holes 121 are correspondingly staggered, the gas flows through multiple times in the process, and the gas collision decompression is performed again, and finally flows out through the plurality of gas outlet holes 121.

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

[0094] Embodiment two

[0095] Referring to the accompanying drawings, Figures 5-9 The embodiment of the present application discloses a gas decompression valve, which comprises the gas decompression structure disclosed in the embodiment one, and further comprises:

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

[0097] The adjusting and decompression assembly 4 is a plurality of groups, and each group of the adjusting and decompression assembly 4 comprises a valve seat 41 and a valve core 42. The plurality of valve seats 41 are coaxially arranged from inside to outside, and a decompression space 5 is reserved between the plurality of valve seats 41. The valve seat 41 is fixed to the bottom wall of the valve cavity 31, and the valve seat 41 is arranged at the center and has a flow-through hole 411. The flow-through hole 411 of the valve seat 41 is in communication with the outlet port of the inlet passage 32. The upper end of the valve core 42 is elastically connected to the top plate of the valve cavity 31, the lower end of the valve core 42 is located in the corresponding flow-through hole 411, and the outer wall of the valve core 42 can form a gas flow-through channel 421 with the inner wall of the flow-through hole 411, and the flow-through width of the gas flow-through channel 421 is adjustable. The gas flow-through channel 421 is in communication with the decompression space 5, and the outlet of the gas flow-through channel 421 located at the outermost side is in communication with the inlet port of the outlet passage 33.

[0098] The gas decompression structure is a plurality of groups and is correspondingly arranged in the plurality of decompression spaces 5. The decompression cylinder 1 is fastened to the bottom wall of the decompression space 5.

[0099] Further, the valve body 3 comprises a valve body and a valve cover, the valve body is provided with an open slot at the upper end, the inlet passage 32 and the outlet passage 33 are both provided on the valve body, and the outlet port of the inlet passage 32 and the inlet port of the outlet passage 33 are both provided on the bottom of the open slot; the valve cover is threadedly connected to the upper end of the valve body and forms a valve cavity 31 with the open slot.

[0100] Further, the valve seat 41 and the valve core 42 of the central regulating pressure reducing assembly 4 are both columnar, and the regulating pressure reducing assemblies 4 coaxially arranged outside the columnar regulating pressure reducing assembly 4 are all annular structures.

[0101] Preferably, the regulating pressure reducing assembly 4 further comprises a pressure stabilizing assembly 6, the pressure stabilizing assembly 6 is a plurality of groups and corresponds to the regulating pressure reducing assembly 4 one by one, the pressure stabilizing assembly 6 comprises a support ring plate one 61, a guide ring plate 62, a regulating spring one 63 and a pressure stabilizing gas passage body 67, the support ring plate one 61 is vertically fixed on the upper end of the valve core 42; the guide ring plate 62 is sleeved outside the support ring plate one 61 and the upper end thereof is fixed with the top plate of the valve cavity 31, the inner wall of the guide ring plate 62, the upper end surface of the support ring plate one 61 and the top plate of the valve cavity 31 form a pressure stabilizing space one 64; the regulating spring one 63 is located in the pressure stabilizing space one 64 and the two ends thereof abut with the top plate and the upper end surface of the support ring plate one 61; the pressure stabilizing gas passage body 67 is provided on the valve core 42, the inlet end of the pressure stabilizing gas passage body 67 is communicated with the outlet of the gas flow passage 421, and the outlet end of the pressure stabilizing gas passage body 67 penetrates through the support ring plate one 61 and is communicated with the pressure stabilizing space one 64, so as to adaptively adjust the flow width of the gas flow passage 421 and realize pressure stabilization.

[0102] Further, the pressure stabilizing assembly 6 further comprises a support ring plate two 65 and a regulating spring two 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 two 65 is located in the pressure reducing space 5 and the lower end thereof is vertically fixed with 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 two 65, the upper end surface of the support ring plate two 65, the inner wall of the guide ring plate 62 and the lower end surface of the support ring plate one 61 form a pressure stabilizing space two 68; the regulating spring two 66 is located in the pressure stabilizing space two 68 and the two ends thereof are fixed with the lower end surface of the support ring plate one 61 and the upper end surface of the support ring plate two 65.

[0103] Further, a ring-shaped support seat 8 is sleeved outside the outermost regulating pressure reducing assembly 4, the bottom end of the ring-shaped support seat 8 is fixed with the bottom wall of the valve cavity 31, and the upper end surface thereof is vertically and tightly connected with the corresponding guide ring plate 62 to improve the stability of the corresponding pressure stabilizing assembly 6 during the adjusting process.

[0104] Preferably, the pressure regulating assembly 7 comprises a push plate 71 and a push rod 72, the push plate 71 is located in the corresponding pressure stabilizing space 64 of the center valve core 42, is slidingly connected to the upper end of the pressure stabilizing space 64, and the lower end surface thereof is in abutment with the adjusting spring 63; the push rod 72 is screwedly connected to the top plate of the valve cavity 31, and the lower end thereof is vertically fixed with the push plate 71, and the upper end thereof penetrates through the top plate of the valve cavity 31 and is located outside the valve cavity 31.

[0105] Further, the screw cap is fixed to the outer 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] The high-pressure gas enters the valve cavity 31 through the flow-through port 411 and the gas flow-through channel 421 of the middle adjusting and pressure reducing assembly 4, and realizes throttling pressure reduction, wherein one way of the high-pressure gas enters the corresponding pressure stabilizing space 64 through the pressure stabilizing gas channel body 67 of the valve core 42, and under the joint action of the high-pressure gas, the adjusting spring 63 and the adjusting spring 66, the flow-through width of the gas flow-through channel 421 can be adaptively adjusted to realize pressure stabilization, and the other way of the high-pressure gas enters the gas pressure reducing structure through the gas inlet hole 112 of the gas pressure reducing structure to realize gas pressure reduction, flows out through the gas outlet hole 121 and enters the corresponding gas flow-through channel 421 of the outer adjusting and pressure reducing assembly 4, and is sequentially repeated and circulated, and finally flows out through the gas outlet channel 33. Through the gas pressure reducing valve, multiple gas pressure reduction and pressure stabilization can be realized, the gas pressure is stably ensured while the high-efficiency pressure reduction is realized.

[0108] According to the gas pressure reducing structure designed in the application, the multi-stage pressure reduction is realized through the impact assembly, the throttling pressure reduction is realized through the gas outlet hole, and the combination of the impact pressure reduction and the throttling pressure reduction can effectively increase the kinetic energy loss in the gas flow to greatly reduce the gas pressure and realize high-efficiency pressure reduction. The application further discloses a gas pressure reducing valve with the gas pressure reducing structure, the adjusting spring and the pressure stabilizing gas channel body are used to adaptively adjust the flow-through width of the gas flow-through channel to realize adaptive adjustment and pressure stabilization, and the gas pressure is stably ensured while the high-efficiency pressure reduction is realized.

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

[0110] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded 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 opened 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 and decompression; A counter-pressure component (2), the counter-pressure component (2) being assembled 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); 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 relatively opened on the inner and outer cylinder walls of the decompression cylinder (1) corresponding to the air flow channel (111). The gas diversion chamber (21) is provided with a diversion hole 1 (22) and a diversion hole 2 (23) 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 gas diversion chamber (21) and a gas diversion chamber (21) on the cavity wall corresponding to the air flow channel (111). 4) is located between the diversion hole 1 (22) and the diversion hole 2 (23) and its plate surface is vertically fixed to the inner wall of the air flow channel (111), and the air flow channel (111) is divided into a first channel and a second channel, so that the air flow in the first channel collides with the plate surface of the hedging plate (24) to achieve pressure reduction, and then is divided into two groups of air flows that flow through the diversion hole 1 (22) and the diversion hole 2 (23) on both sides respectively and collide with each other when entering the second channel to achieve further pressure reduction.

2. A gas decompression structure according to claim 1, characterized in that: 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) communicating with the hedging chamber 1 (211) and the hedging 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 airflow direction perpendicular to the airflow channel (111) and are relatively located on both sides of the punching hole (241), so that the two groups of airflows flowing through the two diversion holes (22) are counter-balanced before entering the punching hole (241) to achieve further pressure reduction.

3. A gas decompression structure according to claim 1, characterized in that: The decompression cylinder (1) comprises a first decompression cylinder (11) and a second decompression cylinder (12), the air flow channel (111) is opened in the cylinder wall of the first decompression cylinder (11), and the cylinder wall of the first decompression cylinder (11) corresponding to the air flow channel (111) forms an inner wall and an outer wall, the air inlet (112) is opened on the inner wall; and an outflow hole (113) is opened on the outer wall; The counter-pressure components (2) are evenly arranged in 2n groups along the airflow direction of the airflow channel (111); the air inlet holes (112) are provided with two and are arranged oppositely at the two ends of the airflow channel (111) along the airflow direction thereof; the outlet holes (113) are located in the middle of the 2n groups of the 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 the gas diversion chambers (21) in sequence and then counter-pressure at the positions of the airflow channel (111) corresponding to the outlet holes (113) to achieve further pressure reduction; The second decompression cylinder (12) is coaxially arranged on the outside of the outer wall and is interference-fitted 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).

4. A gas decompression structure according to claim 3, characterized in that: A gas circulation chamber 1 (122) and a gas circulation chamber 2 (123) are axially opened in the 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 on the 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 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 circulation holes (124) and the plurality of air outlet holes (121) are arranged in a staggered manner to achieve airflow counteraction and pressure reduction again.

5. A gas decompression structure according to claim 4, 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) that 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.

6. A gas pressure reducing valve, comprising a gas pressure reducing structure according to any one of claims 1 to 5, 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), and each group of the regulating and decompression assemblies (4) comprises 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 decompression 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). The flow port (411) of the valve seat (41) located at the center is in contact with the air inlet passage ( 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 communicated with the decompression space (5), and the outlet of the gas circulation channel (421) located at the outermost side is connected to the air inlet port of the gas outlet channel (33); The gas decompression structures are in multiple groups and are correspondingly assembled in multiple groups of the decompression spaces (5). The decompression cylinders (1) are fastened to the bottom walls of the decompression spaces (5).

7. A gas pressure reducing valve according to claim 6, characterized in that: The invention also includes a pressure stabilizing assembly (6), wherein the pressure stabilizing assembly (6) is a plurality of groups and corresponds to the regulating and reducing assembly (4) one by one, and the pressure stabilizing assembly (6) includes a supporting ring plate (61), a guide 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 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), and 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 connected. A pressure-stabilizing space (64) is formed between the valve core (42) and the regulating spring (63) is located in the pressure-stabilizing space (64) and its two ends are correspondingly in contact with 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), the inlet end of the pressure-stabilizing gas channel body (67) is connected to the outlet of the gas circulation 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) to adaptively adjust the circulation width of the gas circulation channel (421) to achieve pressure stabilization.

8. A gas pressure reducing valve according to claim 7, characterized in that: The pressure stabilizing assembly (6) further includes 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 face of the second support ring plate (65). A second pressure stabilizing space (68) is formed between the upper end face of the second support ring plate (65), the inner wall of the guide ring plate (62) and the lower end face of the first support ring plate (61). The second regulating spring (66) is located in the second pressure stabilizing space (68) and its two ends are fixed correspondingly to the lower end face of the first support ring plate (61) and the upper end face of the second support ring plate (65).

9. A gas pressure reducing valve according to claim 7, characterized in that: It also includes a pressure regulating assembly (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 valve core (42) at the center, 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).

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