A pressure reducing valve

Abstract

This invention relates to a counter-flushing component and a pressure-reducing valve having the same, belonging to the technical field of pressure-reducing valves. It includes a column with a counter-flushing cavity inside and multiple inlet channels and multiple outlet channels arranged radially on its outer wall. The inlet and outlet channels are staggered and spaced along the circumference of the column and are all connected to the counter-flushing cavity. This invention first arranges multiple inlet and outlet channels circumferentially and staggeredly on the outer wall of the column, and then connects all the inlet and outlet channels to the counter-flushing cavity inside the column. When multiple streams of high-pressure gas or high-pressure liquid simultaneously flow into the counter-flushing cavity, they are first counter-flushed and depressurized within the counter-flushing cavity before flowing out through the outlet channels. This significantly reduces the pressure of the high-pressure gas or liquid, preventing high-pressure impact on the counter-flushing component and extending its service life.

Description

Technical Field

[0001] This invention relates to the field of pressure reducing valve technology, and particularly to a pressure reducing valve. Background Technology

[0002] A pressure reducing valve is a valve that automatically reduces the working pressure of a pipeline. It can accurately and stably reduce the high gas or liquid pressure (such as 35 / 70MPa) in the pipeline upstream of the valve to the required level (such as 0.5 to 1MPa) in the pipeline downstream of the valve.

[0003] Currently, common pressure reduction methods include throttling, counter-pressure reduction, and capacity expansion, which essentially involve some energy loss during the pressure reduction process. However, ① during pressure reduction, a large amount of energy is absorbed by the internal structure of the valve, which bears significant pressure and impact, leading to a substantial reduction in the service life of the pressure reducing valve; ② due to the complexity of operating conditions (high temperature, low temperature, high pressure, supersonic speed, etc.), the unstable nature of gases or liquids (under high temperature and high pressure, some gases or liquids undergo phase changes or are compressed, making them prone to explosion), and improper operation by workers, the pressure reducing valve may fail to reach the target pressure after reducing the pressure of high-pressure gas or liquid, and the pressure after pressure reduction may still be higher than the rated outlet pressure; ③ insufficient pressure reduction capacity; ④ insufficient pressure stabilization effect, making it difficult to achieve precise pressure reduction under high pressure and maintain stable outlet pressure and flow.

[0004] Therefore, how to design a counter-pressure component with strong pressure reduction capacity, high pressure stabilization capacity, long service life and high safety factor, and a pressure reducing valve with such a component, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a pressure reducing valve that solves the technical problems of existing pressure reducing valves, such as short service life, insufficient pressure reducing capacity, poor pressure stabilization effect, and low safety factor.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a counter-pressure component, comprising: a column, wherein the column has a counter-pressure cavity inside and a plurality of inflow channels and a plurality of outflow channels arranged radially on its outer wall, the plurality of inflow channels and the plurality of outflow channels being staggered along the circumference of the column and all communicating with the counter-pressure cavity, so that multiple streams of high-pressure gas or multiple streams of high-pressure liquid simultaneously injected from the plurality of inflow channels are focused in the counter-pressure cavity to complete the counter-pressure reduction.

[0007] The beneficial effects of this invention are as follows: An innovative design of the anti-flush component involves firstly, circumferentially spaced and staggered arrangement of multiple inlet channels and multiple outlet channels on the outer wall of the column, and then connecting these channels to the anti-flush cavity inside the column. Since the multiple inlet channels and multiple outlet channels are arranged radially along the column, when multiple streams of high-pressure gas or high-pressure liquid simultaneously flow into the multiple inlet channels, they will first be anti-flushd and depressurized within the anti-flush cavity before flowing out through the multiple outlet channels. This significantly reduces the pressure of the high-pressure gas or high-pressure liquid, preventing high-pressure impact on the anti-flush component and extending its service life.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the anti-flush chamber, the plurality of inflow channels, and the plurality of outflow channels form an anti-flush unit. The anti-flush units are multiple and spaced apart along the axial direction of the column. The plurality of outflow channels and the plurality of inflow channels of the adjacent anti-flush units are arranged opposite to each other. The outer wall of the column is provided with a plurality of connecting grooves. The outlets of adjacent and opposite outflow channels and the inflow channels are all located in the same connecting groove, so that after the column is inserted into the inflow channel of the pressure reducing valve body, the adjacent and opposite outflow channels and the inflow channels are connected.

[0010] The further beneficial effects of adopting the above are:

[0011] 1. Multiple counter-pressure units are designed on the column at intervals along the axial direction, which can reduce the pressure of high-pressure gas or high-pressure liquid in stages and multiple times, thus greatly reducing the impact force of high-pressure gas or high-pressure liquid on the column.

[0012] 2. The further beneficial effect of adopting the above is that by setting the relatively connected outflow channel and inflow channel at the bottom of the same connecting groove, it is convenient for the relatively connected inflow channel and outflow channel to communicate with each other.

[0013] Furthermore, the first end of the column has multiple inlet connection channels along its axial direction, and the second end has multiple outlet connection channels along its axial direction. The multiple inlet connection channels are respectively connected to the multiple adjacent inlet channels one by one, so that after the column is inserted into the inlet channel, the axially flowing high-pressure gas or high-pressure liquid is converted into radial flow. The multiple outlet connection channels are respectively connected to the multiple adjacent outlet channels one by one, so that after the column is inserted into the inlet channel, the radially flowing high-pressure gas or high-pressure liquid is converted into axial flow.

[0014] The further beneficial effect of the above is that by setting multiple connecting inlet channels and multiple connecting outlet channels at both ends of the column, since the multiple connecting inlet channels are respectively connected to multiple adjacent inlet channels, and since the multiple connecting outlet channels are respectively connected to multiple adjacent outlet channels, after the column is inserted into the inlet channel, the axially flowing high-pressure gas or high-pressure liquid can be first converted into radial flow for counterflow, and then the radially flowing high-pressure gas or high-pressure liquid can be converted into axial flow for subsequent flow.

[0015] Furthermore, the diameters of the plurality of outflow channels and the plurality of inflow channels increase sequentially from the direction closest to the counter-current chamber to the direction furthest from the counter-current chamber.

[0016] The further beneficial effect of adopting the above is that by increasing the diameter of the multiple outflow channels and the diameter of the multiple inflow channels sequentially from the direction closer to the counter-current chamber to the direction farther away from the counter-current chamber, the flow rate of high-pressure gas or high-pressure liquid can be increased, thereby improving the counter-current effect of high-pressure gas or high-pressure liquid.

[0017] Additionally, a pressure reducing valve is provided, comprising: a valve body, a pressure reducing assembly, and two counteracting members. The valve body has a valve cavity inside and an inlet channel and a pressure reducing valve hole on its outer wall. Both the inlet channel and the pressure reducing valve hole are connected to the valve cavity, and the pressure reducing valve hole has a pressure reducing outlet hole on its wall. The two columns are respectively placed in the inlet channel and the pressure reducing outlet hole. The pressure reducing assembly is detachably connected to the pressure reducing valve hole and can discharge high-pressure gas or high-pressure liquid in the valve cavity that is higher than a predetermined pressure from the pressure reducing outlet hole.

[0018] The further beneficial effect of adopting the above is that by placing multiple columns in the inlet channel and the pressure reducing outlet hole respectively, the impact force of high pressure gas or high pressure liquid can be greatly reduced, avoiding the impact of high pressure gas or high pressure liquid on the valve body, counter-impact parts, pressure reducing valve cover, pressure reducing spring or pressure reducing valve core, thus extending the service life of the pressure reducing valve.

[0019] Furthermore, the pressure reducing assembly includes a pressure reducing valve cover, a pressure reducing spring, and a pressure reducing valve core. The pressure reducing valve cover is detachably connected to the pressure reducing valve orifice. The pressure reducing spring is placed inside the pressure reducing valve orifice, with one end contacting the pressure reducing valve cover. The pressure reducing valve core passes through the valve cavity and slides in a sealed manner within the pressure reducing valve orifice. The other end of the pressure reducing spring contacts the pressure reducing valve core, so that under the impact of the high-pressure gas or high-pressure liquid in the valve cavity, the pressure reducing valve core slides, compressing the pressure reducing spring, thereby connecting the valve cavity with the pressure reducing outlet, and completing the pressure reducing and discharge of the high-pressure gas or high-pressure liquid in the valve cavity.

[0020] The further beneficial effect of the above is that when the pressure of the high-pressure gas or high-pressure liquid in the valve cavity is too high, it will push the pressure reducing valve core to slide, squeeze the compression spring, and cause the pressure reducing valve core to slide away from the pressure reducing outlet, thus connecting the valve cavity and the pressure reducing outlet, and completing the pressure reduction and discharge of the high-pressure gas or high-pressure liquid.

[0021] Furthermore, the pressure-reducing valve orifice is divided into a pressure-reducing orifice section and a pressure-stabilizing orifice section from near the valve cavity to far away from the valve cavity. The pressure-reducing orifice section communicates with the valve cavity, and the pressure-reducing outlet is located on the wall of the pressure-stabilizing orifice section. The pressure-reducing valve core includes a core block, a valve stem, and a valve plate. The core block is sealed and fixed within the pressure-reducing orifice section and has a through hole in its middle. The valve stem passes through the valve cavity and gaps through the through hole to define a pressure-reducing channel between the outer wall of the valve stem and the inner wall of the through hole. The valve plate slides sealed within the pressure-stabilizing orifice section, and one side of its plate surface can contact the core block. The other end of the pressure-reducing spring contacts the other side of the valve plate to push the valve plate to slide under the impact of the high-pressure gas or high-pressure liquid in the valve cavity, squeezing and compressing the pressure-reducing spring, causing the valve plate to move away from the core block and open the through hole, thus completing the pressure reduction and discharge of the high-pressure gas or high-pressure liquid in the valve cavity.

[0022] The further beneficial effects of adopting the above are:

[0023] 1. High-pressure gas or high-pressure liquid flows into the valve chamber through the inlet channel, and then the pressure is reduced again after passing through the pressure reducing channel.

[0024] 2. When the pressure of the high-pressure gas or high-pressure liquid flowing out through the pressure reducing channel is still too high, it will push the valve plate to slide and squeeze the compression spring, so that the valve plate is away from the through hole of the core block, opening the valve cavity, pressure reducing channel, through hole and pressure reducing outlet hole, thus completing the pressure reduction and discharge of high-pressure gas or high-pressure liquid.

[0025] Furthermore, the valve plate includes a support ring, a push rod, and a spring seat. The support ring slides in a sealed manner within the pressure-reducing hole section; the push rod slides in a sealed manner within the support ring, and one end of the push rod can contact the core block; the spring seat is fixed to the other end of the push rod; the other end of the pressure-reducing spring contacts the spring seat, so that under the impact of the high-pressure gas or high-pressure liquid in the valve cavity, the push rod is pushed to slide, compressing the pressure-reducing spring, causing the push rod to move away from the core block and open the through hole, thereby completing the pressure reduction and discharge of the high-pressure gas or high-pressure liquid in the valve cavity.

[0026] Furthermore, it also includes a pressure relief assembly, wherein the valve body is provided with a pressure relief valve hole communicating with the valve cavity and the wall of the pressure relief valve hole is provided with a pressure relief outlet hole; the pressure relief assembly is detachably connected to the pressure relief valve hole and can discharge high-pressure gas or high-pressure liquid in the valve cavity that is higher than a predetermined pressure from the pressure relief outlet hole.

[0027] Furthermore, the pressure relief assembly includes a pressure relief valve cover, a pressure relief spring, and a pressure relief valve core. The pressure relief valve cover is detachably connected to the pressure relief valve orifice. The pressure relief spring is placed inside the pressure relief valve orifice, with one end in contact with the pressure relief valve cover. The pressure relief valve core slides in a sealing manner within the pressure relief valve orifice. The other end of the pressure relief spring contacts the pressure relief valve core, so that under the impact of the counter-pressure gas or counter-pressure liquid, the pressure relief valve core is pushed to slide, compressing the pressure relief spring, thereby connecting the valve cavity with the pressure relief outlet and completing the pressure relief discharge of the high-pressure gas or high-pressure liquid in the valve cavity.

[0028] The further beneficial effect of adopting the above is that when the pressure inside the valve cavity is too high, the pressure relief valve core can be pushed to slide and compress the pressure relief spring, opening the valve cavity and the pressure relief outlet, completing the pressure relief and discharge of high-pressure gas or high-pressure liquid, avoiding excessive pressure inside the valve cavity, damaging the pressure reducing valve, and improving the safety of the pressure reducing valve in use. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of a pressure reducing valve according to the present invention;

[0030] Figure 2 This is a front view schematic diagram of a pressure reducing valve according to the present invention;

[0031] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0032] Figure 4 for Figure 3 A magnified structural diagram of section B;

[0033] Figure 5 This is a side view of a pressure reducing valve according to the present invention.

[0034] Figure 6 for Figure 5 Cross-sectional structural diagram at CC;

[0035] Figure 7 This is a three-dimensional structural schematic diagram of a countersinking component according to the present invention;

[0036] Figure 8 This is a schematic diagram of the internal structure of a countersinking component according to the present invention.

[0037] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0038] 1. Column, 11. Counter-current chamber, 12. Inlet channel, 13. Outlet channel, 14. Connecting groove, 15. Connecting inlet channel, 16. Connecting outlet channel, 2. Valve body, 21. Valve cavity, 22. Inlet channel, 23. Pressure reducing valve hole, 231. Pressure reducing hole section, 232. Pressure stabilizing hole section, 24. Pressure reducing outlet, 25. Pressure relief valve hole, 26. Pressure relief outlet, 3. Pressure reducing assembly, 31. Pressure reducing valve cover, 32. Pressure reducing spring, 33. Pressure reducing valve core, 331. Core block, 332. Valve stem, 333. Valve plate, 3331. Support ring, 3332. Top rod, 3333. Spring seat, 4. Pressure relief assembly, 41. Pressure relief valve cover, 42. Pressure relief spring, 43. Pressure relief valve core. Detailed Implementation

[0039] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0040] like Figure 7 and Figure 8 As shown, a counter-pressure component includes: a column 1, the column 1 having a counter-pressure cavity 11 inside and a plurality of inflow channels 12 and a plurality of outflow channels 13 arranged radially on its outer wall. The plurality of inflow channels 12 and the plurality of outflow channels 13 are staggered along the circumference of the column 1 and are all connected to the counter-pressure cavity 11, so that multiple streams of high-pressure gas or multiple streams of high-pressure liquid simultaneously injected from the plurality of inflow channels 12 are focused in the counter-pressure cavity 11 to complete the counter-pressure reduction.

[0041] like Figure 7 and Figure 8 As shown, in some specific embodiments, the anti-flush chamber 11, multiple inflow channels 12, and multiple outflow channels 13 form an anti-flush unit. There are multiple anti-flush units, which are distributed at intervals along the axial direction of the column 1. The multiple outflow channels 13 and multiple inflow channels 12 of each pair of adjacent anti-flush units are arranged opposite to each other. Multiple connecting grooves 14 are provided on the outer wall of the column 1. The outlets of adjacent and opposite outflow channels 13 and the inlets of inflow channels 12 are located in the same connecting groove 14, so that after the column 1 is inserted into the inflow channel 22 in the pressure reducing valve body 2, the adjacent and opposite outflow channels 13 and inflow channels 12 are connected.

[0042] like Figure 7 and Figure 8As shown, in some specific embodiments, the first end of the column 1 has a plurality of inflow connection channels 15 along its axial direction, and the second end has a plurality of outflow connection channels 16 along its axial direction. The plurality of inflow connection channels 15 are respectively connected to the plurality of adjacent inflow channels 12 one by one, so that after the column 1 is inserted into the inflow channel 22, the axially flowing high-pressure gas or high-pressure liquid is converted into radial flow. The plurality of outflow connection channels 16 are respectively connected to the plurality of adjacent outflow channels 13 one by one, so that after the column 1 is inserted into the inflow channel 22, the radially flowing high-pressure gas or high-pressure liquid is converted into axial flow.

[0043] like Figure 7 and Figure 8 As shown, in some specific embodiments, the diameters of the plurality of outflow channels 13 and the plurality of inflow channels 12 increase sequentially from the direction closer to the counter-current chamber 11 to the direction farther away from the counter-current chamber 11.

[0044] In addition, such as Figure 1 and Figure 2 As shown, a pressure reducing valve is provided, including: a valve body 2, a pressure reducing assembly 3, and two counteracting parts. The valve body 2 has a valve cavity 21 inside and an inlet channel 22 and a pressure reducing valve hole 23 on its outer wall. The inlet channel 22 and the pressure reducing valve hole 23 are both connected to the valve cavity 21, and the pressure reducing valve hole 23 has a pressure reducing outlet hole 24 on its hole wall. Two columns 1 are respectively placed in the inlet channel 22 and the pressure reducing outlet hole 24. The pressure reducing assembly 3 is detachably connected to the pressure reducing valve hole 23 and can discharge high-pressure gas or high-pressure liquid in the valve cavity 21 with a pressure higher than a predetermined pressure from the pressure reducing outlet hole 24.

[0045] like Figure 3 and Figure 4 As shown, in some specific embodiments, the pressure reducing assembly 3 may include a pressure reducing valve cover 31, a pressure reducing spring 32, and a pressure reducing valve core 33. The pressure reducing valve cover 31 is detachably connected to the pressure reducing valve hole 23; the pressure reducing spring 32 is placed inside the pressure reducing valve hole 23 and one end of it contacts the pressure reducing valve cover 31; the pressure reducing valve core 33 passes through the valve cavity 21 and slides in the pressure reducing valve hole 23 in a sealed manner; the other end of the pressure reducing spring 32 contacts the pressure reducing valve core 33 so that under the impact of high-pressure gas or high-pressure liquid in the valve cavity 21, the pressure reducing valve core 33 is pushed to slide, squeezing and compressing the pressure reducing spring 32, so that the valve cavity 21 communicates with the pressure reducing outlet hole 24, thereby completing the pressure reducing and discharge of high-pressure gas or high-pressure liquid in the valve cavity 21.

[0046] like Figure 3 and Figure 4As shown, in some specific embodiments, the pressure reducing valve orifice 23 is divided into a pressure reducing orifice section 231 and a pressure stabilizing orifice section 232 in the direction from the valve cavity 21 to the direction away from the valve cavity 21. The pressure reducing orifice section 231 communicates with the valve cavity 21, and the pressure reducing outlet 24 is provided on the orifice wall of the pressure stabilizing orifice section 232. The pressure reducing valve core 33 includes a core block 331, a valve stem 332, and a valve plate 333. The core block 331 is sealed and fixed in the pressure reducing orifice section 231 and has a through hole in its middle. The valve stem 332 passes through the valve cavity 21 and passes through the through hole with a gap. A pressure-reducing channel is defined between the outer wall of the valve stem 332 and the inner wall of the through hole; the valve plate 333 is sealed and slides within the pressure-stabilizing hole section 232, and one side of its plate can contact the core block 331; the other end of the pressure-reducing spring 32 contacts the other side of the valve plate 333, so that under the impact of high-pressure gas or high-pressure liquid in the valve cavity 21, the valve plate 333 is pushed to slide, squeezing and compressing the pressure-reducing spring 32, so that the valve plate 333 moves away from the core block 331 and opens the through hole, thus completing the pressure reduction and discharge of high-pressure gas or high-pressure liquid in the valve cavity 21.

[0047] like Figure 3 and Figure 4 As shown, in some specific embodiments, the valve plate 333 may include a support ring 3331, a push rod 3332, and a spring seat 3333. The support ring 3331 is sealed and slides within the pressure reducing hole section 231; the push rod 3332 is sealed and slides within the support ring 3331, and one end of it can contact the core block 331; the spring seat 3333 is fixed to the other end of the push rod 3332; the other end of the pressure reducing spring 32 contacts the spring seat 3333, so that under the impact of high-pressure gas or high-pressure liquid in the valve cavity 21, the push rod 3332 is pushed to slide, squeezing and compressing the pressure reducing spring 32, so that the push rod 3332 moves away from the core block 331 to open the through hole, thereby completing the pressure reduction and discharge of high-pressure gas or high-pressure liquid in the valve cavity 21.

[0048] like Figure 5 and Figure 6 As shown, in some specific embodiments, a pressure relief component 4 may also be included. The valve body 2 is provided with a pressure relief valve hole 25 communicating with the valve cavity 21, and the wall of the pressure relief valve hole 25 is provided with a pressure relief outlet hole 26. The pressure relief component 4 is detachably connected to the pressure relief valve hole 25 and can discharge high-pressure gas or high-pressure liquid in the valve cavity 21 that is higher than the predetermined pressure from the pressure relief outlet hole 26.

[0049] like Figure 5 and Figure 6As shown, in some specific embodiments, the pressure relief assembly 4 includes a pressure relief valve cover 41, a pressure relief spring 42, and a pressure relief valve core 43. The pressure relief valve cover 41 is detachably connected to the pressure relief valve hole 25; the pressure relief spring 42 is placed inside the pressure relief valve hole 25 and one end of it contacts the pressure relief valve cover 41; the pressure relief valve core 43 slides in a sealed manner in the pressure relief valve hole 25; the other end of the pressure relief spring 42 contacts the pressure relief valve core 43 so that under the impact of the counter-pressure gas or counter-pressure liquid, the pressure relief valve core 43 is pushed to slide, squeezing and compressing the pressure relief spring 42, so that the valve cavity 21 is connected to the pressure relief outlet 26, thereby completing the pressure relief and discharge of the high-pressure gas or high-pressure liquid in the valve cavity 21.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure reducing valve, characterized in that, include: Valve body (2), pressure reducing assembly (3), and two counter-flush parts, The counter-pressure component includes a column (1), the column (1) has a counter-pressure cavity (11) inside and a plurality of inlet channels (12) and a plurality of outlet channels (13) arranged radially on its outer wall. The plurality of inlet channels (12) and the plurality of outlet channels (13) are staggered along the circumference of the column (1) and are all connected to the counter-pressure cavity (11) so that multiple streams of high-pressure gas or multiple streams of high-pressure liquid simultaneously injected from the plurality of inlet channels (12) are focused in the counter-pressure cavity (11) to complete the counter-pressure reduction. The valve body (2) has a valve cavity (21) inside and an inlet channel (22) and a pressure reducing valve hole (23) on its outer wall. The inlet channel (22) and the pressure reducing valve hole (23) are both connected to the valve cavity (21), and the pressure reducing valve hole (23) has a pressure reducing outlet hole (24) on its hole wall. The two columns (1) are respectively placed in the inlet channel (22) and the pressure reducing outlet hole (24). The pressure reducing assembly (3) is detachably connected to the pressure reducing valve hole (23) and can discharge high-pressure gas or high-pressure liquid in the valve cavity (21) that is higher than the predetermined pressure from the pressure reducing outlet hole (24). The counter-flush chamber (11), the plurality of inflow channels (12) and the plurality of outflow channels (13) form a counter-flush unit. The counter-flush units are multiple and spaced apart along the axial direction of the column (1). The plurality of outflow channels (13) and the plurality of inflow channels (12) of the counter-flush units are arranged opposite to each other. The outer wall of the column (1) is provided with a plurality of connecting grooves (14). The outlets of the adjacent and opposite outflow channels (13) and the inflow channels (12) are located in the same connecting groove (14) so ​​that after the inflow channel (22) of the pressure reducing valve is inserted into the column (1), the adjacent and opposite outflow channels (13) and the inflow channels (12) are connected. The first end of the column (1) is provided with a plurality of connecting inlet channels (15) along its axial direction, and the second end is provided with a plurality of connecting outlet channels (16) along its axial direction. The plurality of connecting inlet channels (15) are respectively connected to the plurality of adjacent inlet channels (12) one by one, so that after the column (1) is inserted into the inlet channel (22), the axially flowing high-pressure gas or high-pressure liquid is converted into radial flow. The plurality of connecting outlet channels (16) are respectively connected to the plurality of adjacent outlet channels (13) one by one, so that after the column (1) is inserted into the inlet channel (22), the radially flowing high-pressure gas or high-pressure liquid is converted into axial flow. The diameters of the plurality of outflow channels (13) and the plurality of inflow channels (12) increase sequentially from the direction closer to the counter-current chamber (11) to the direction farther away from the counter-current chamber (11); The pressure reducing assembly (3) includes a pressure reducing valve cover (31), a pressure reducing spring (32), and a pressure reducing valve core (33). The pressure reducing valve cover (31) is detachably connected to the pressure reducing valve hole (23). The pressure reducing spring (32) is placed inside the pressure reducing valve hole (23) and one end of it is in contact with the pressure reducing valve cover (31). The pressure reducing valve core (33) passes through the valve cavity (21) and slides in the pressure reducing valve hole (23) in a sealed manner. The other end of the pressure reducing spring (32) is in contact with the pressure reducing valve core (33) so that under the impact of the high-pressure gas or high-pressure liquid in the valve cavity (21), the pressure reducing valve core (33) is pushed to slide, and the pressure reducing spring (32) is squeezed and compressed, so that the valve cavity (21) communicates with the pressure reducing outlet (24), and the pressure reducing gas or high-pressure liquid in the valve cavity (21) is discharged. It also includes a pressure relief assembly (4), wherein the valve body (2) is provided with a pressure relief valve hole (25) communicating with the valve cavity (21), and the pressure relief valve hole (25) is provided with a pressure relief outlet hole (26) on the hole wall; the pressure reducing valve hole (23) is divided into a pressure reducing hole section (231) and a pressure stabilizing hole section (232) in sequence from the direction close to the valve cavity (21) to the direction away from the valve cavity (21), the pressure reducing hole section (231) communicating with the valve cavity (21), and the pressure reducing outlet hole (24) is provided on the hole wall of the pressure stabilizing hole section (232); the pressure reducing valve core (33) includes a core block (331), a valve stem (332) and a valve plate (333), the core block (331) is sealed and fixed in the pressure reducing hole section (231) and has a through hole in its middle; The valve stem (332) passes through the valve cavity (21) and gaps through the through hole to define a pressure relief channel between the outer wall of the valve stem (332) and the inner wall of the through hole; the valve plate (333) slides in the pressure stabilizing hole section (232) and one side of its plate can contact the core block (331); the other end of the pressure relief spring (32) contacts the other side of the valve plate (333) so that under the impact of the high pressure gas or high pressure liquid in the valve cavity (21), the valve plate (333) is pushed to slide, squeezing and compressing the pressure relief spring (32), so that the valve plate (333) moves away from the core block (331) and opens the through hole, thereby completing the pressure relief and discharge of the high pressure gas or high pressure liquid in the valve cavity (21).

2. A pressure reducing valve according to claim 1, characterized in that, The pressure relief assembly (4) is detachably connected to the pressure relief valve hole (25) and can discharge high-pressure gas or high-pressure liquid in the valve chamber (21) that is higher than the predetermined pressure from the pressure relief outlet (26).

3. A pressure reducing valve according to claim 2, characterized in that, The valve plate (333) includes a support ring (3331), a push rod (3332), and a spring seat (3333). The support ring (3331) is sealed and slides within the pressure reducing hole section (231). The push rod (3332) is sealed and slides within the support ring (3331), and one end of it can contact the core block (331). The spring seat (3333) is fixed to the other end of the push rod (3332). The other end of the pressure reducing spring (32) contacts the spring seat (3333) so that under the impact of the high-pressure gas or high-pressure liquid in the valve cavity (21), the push rod (3332) is pushed to slide, and the pressure reducing spring (32) is squeezed and compressed, so that the push rod (3332) moves away from the core block (331) and opens the through hole, thereby completing the pressure reduction and discharge of the high-pressure gas or high-pressure liquid in the valve cavity (21).

4. A pressure reducing valve according to claim 1, characterized in that, The pressure relief assembly (4) includes a pressure relief valve cover (41), a pressure relief spring (42), and a pressure relief valve core (43). The pressure relief valve cover (41) is detachably connected to the pressure relief valve hole (25). The pressure relief spring (42) is placed inside the pressure relief valve hole (25) and one end of it is in contact with the pressure relief valve cover (41). The pressure relief valve core (43) is sealed and slid in the pressure relief valve hole (25). The other end of the pressure relief spring (42) is in contact with the pressure relief valve core (43) so that under the impact of the counter-pressure gas or the counter-pressure liquid, the pressure relief valve core (43) is pushed to slide, and the pressure relief spring (42) is squeezed and compressed, so that the valve cavity (21) is connected to the pressure relief outlet (26), and the pressure relief of the high-pressure gas or high-pressure liquid in the valve cavity (21) is completed.

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