A pressure relief device

Abstract

The present invention provides a pressure reducing device, which relates to the technical field of high-pressure pressure reducing, and includes a pressure reducing valve group, a pressure gauge valve group and a stop valve group, wherein the pressure gauge valve group displays the pressure of the gas at the inlet end of the pressure reducing valve group, and the stop valve group is used to open or close the gas delivery at the outlet end of the pressure reducing valve group, and the pressure reducing valve group includes a first pressure reducing valve, a second pressure reducing valve and a third pressure reducing valve, wherein the first pressure reducing valve is arranged on the side of the pressure reducing valve group close to the pressure gauge valve group, and the second pressure reducing valve and the third pressure reducing valve are arranged on the side of the pressure reducing valve group close to the stop valve group. The pressure reducing device designed by the present invention uses a two-stage pressure reducing method to quickly reduce the pressure of the passing gas, quickly reduce the pressure of the high-pressure gas entering the inlet end to a low-pressure gas suitable for the human body, and reduce the overall volume of the pressure reducing valve group as much as possible, so as to facilitate handling and carrying.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure decompression, and in particular to a decompression device. Background Art

[0002] During the voyage of a ship at sea, some special situations may occur, which may affect the life safety of the crew, and the crew may face the situation that they cannot immediately perform escape actions, such as the need to perform necessary operations in the cabin, or the ship is unable to escape due to disasters such as fire, pollution, flooding or the spread of unknown harmful substances, so that the crew must stay in the closed cabin for rescue, and the crew in the cabin cannot get enough oxygen and will face the danger of suffocation. Traditional oxygen equipment mostly uses a combination of oxygen cylinders, pressure reducing valves and breathing masks to supplement oxygen for the crew. However, this set of equipment has many parts, large volume, short service life, and cannot be equipped for all crew members at the same time. In addition, the situation is very chaotic when the danger occurs. The crew may not have time to find their own life-saving equipment, resulting in the lack of sufficient oxygen breathing equipment for the crew, or the oxygen breathing equipment is not durable enough, resulting in casualties due to lack of oxygen before rescue.

[0003] Most ships are equipped with air systems, and using air systems instead of oxygen cylinders is a good option for crew members to obtain oxygen. However, the gas pressure in the air system is relatively high, often above tens of MPa, and cannot be used directly by the human body. It can only be used after being decompressed by decompression equipment. However, there is currently no decompression device designed for the air system on ships on the market that can directly reduce the gas from high pressure to a level that can be used by the human body. Summary of the invention

[0004] The problem solved by the present invention is how to improve the decompression device so that the decompression device can directly reduce the high-pressure gas to a level that can be used by the human body, and can also be convenient for mobile use in emergency situations.

[0005] To solve the above problems, the present invention provides a pressure reducing device, comprising a pressure reducing valve group, a pressure gauge valve group and a stop valve group, the pressure gauge valve group is arranged at the inlet end of the pressure reducing valve group, the stop valve group is arranged at the outlet end of the pressure reducing valve group, the stop valve group is used to open or close the gas delivery at the outlet end of the pressure reducing valve group, the pressure reducing valve group comprises a first pressure reducing valve, a second pressure reducing valve and a third pressure reducing valve, the first pressure reducing valve is arranged on a side of the pressure reducing valve group close to the pressure gauge valve group, the first pressure reducing valve is used to reduce the pressure of high-pressure gas entering through the pressure gauge valve group to medium-pressure gas, the second pressure reducing valve and the third pressure reducing valve are arranged on a side of the pressure reducing valve group close to the stop valve group, the second pressure reducing valve and the third pressure reducing valve are used to jointly reduce the pressure of the medium-pressure gas transmitted by the first pressure reducing valve to low-pressure gas.

[0006] Preferably, the pressure reducing valve group also includes a pressure reducing valve body, which is a hollow structure and is provided with a first pressure reducing valve hole, a second pressure reducing valve hole and a third pressure reducing valve hole, the first pressure reducing valve, the second pressure reducing valve and the third pressure reducing valve are respectively installed in the first pressure reducing valve hole, the second pressure reducing valve hole and the third pressure reducing valve hole, and the distance from the center of the first pressure reducing valve to the center of the second pressure reducing valve hole is the same as the distance from the center of the first pressure reducing valve to the center of the third pressure reducing valve hole.

[0007] Preferably, the pressure reducing valve body is further provided with a first stop valve hole, a second stop valve hole, a third stop valve hole and a fourth stop valve hole, the first stop valve hole and the second stop valve hole are respectively arranged at the inlet ends of the second pressure reducing valve and the third pressure reducing valve, the third stop valve hole and the fourth stop valve hole are respectively arranged at the outlet ends of the second pressure reducing valve and the third pressure reducing valve, and the first stop valve hole, the second stop valve hole, the third stop valve hole and the fourth stop valve hole are used to install stop valves to control the gas input and output of the second pressure reducing valve and the third pressure reducing valve.

[0008] Preferably, the centers of the first stop valve hole and the third stop valve hole are on different horizontal planes, and the centers of the second stop valve hole and the fourth stop valve hole are on different horizontal planes.

[0009] Preferably, the pressure reducing valve body is further provided with a first pressure gauge valve hole, the first pressure gauge valve hole is arranged at the outlet end of the pressure reducing valve body, and a pressure gauge is installed on the first pressure gauge valve hole.

[0010] Preferably, the pressure gauge valve group includes a pressure gauge valve body and a pressure gauge valve wheel, the pressure gauge valve body includes a first connecting part, a second connecting part, a pressure gauge valve mounting part and a pressure gauge joint, the first connecting part is connected to the inlet end of the pressure reducing valve group, the second connecting part is used to connect to an external air system, the pressure gauge valve mounting part is used to install the pressure gauge valve wheel, the pressure gauge joint is used to install the pressure gauge, and the pressure gauge valve wheel is used to control the switch of the pressure gauge.

[0011] Preferably, an air intake channel and a first mounting hole are provided on the pressure gauge valve body, the first mounting hole is communicated with the air intake channel, the pressure gauge joint is communicated with the first mounting hole, and the pressure gauge valve wheel is installed in the first mounting hole for opening or blocking the gas flow between the air intake channel and the pressure gauge joint.

[0012] Preferably, the stop valve assembly includes a stop valve body, a stop valve and a safety valve. The safety valve is installed on both sides of the stop valve body and is connected to the stop valve for relieving the pressure exceeding the standard of the stop valve. The stop valve is installed on the upper side of the stop valve body for controlling the output of the gas.

[0013] Preferably, the stop valve body is provided with an air outlet channel, a fifth stop valve hole and a sixth stop valve hole, the fifth stop valve hole and the sixth stop valve hole are used to install the stop valve, one end of the air outlet channel is connected to the outlet end of the pressure reducing valve group, and the other end is provided with a fork, and the two channels of the fork are respectively connected to the fifth stop valve hole and the sixth stop valve hole.

[0014] Preferably, the input air pressure at the inlet end of the pressure reducing valve group is between 25MPa and 40MPa, the output air pressure at the output end of the first pressure reducing valve is between 3.5MPa and 15MPa, and the output air pressure at the outlet end of the pressure reducing valve group is less than or equal to 0.7MPa.

[0015] The pressure reducing device designed in the present invention comprises a pressure gauge valve group, a pressure reducing valve group and a stop valve group. The pressure gauge valve group enables the pressure reducing device to monitor the pressure and input amount of the input gas, and the stop valve group enables the pressure reducing device to control the output amount of the output gas, so that the user can monitor the gas pressure output by the air system in real time to judge the gas residual in the air system, and control the gas output amount of the pressure reducing device, so that the pressure reducing device can meet the use of different number of people. At the same time, the first pressure reducing valve on the pressure reducing valve group is arranged at the front end, and the second pressure reducing valve and the third pressure reducing valve are arranged at the rear end. After the gas input is reduced in pressure by the first pressure reducing valve, it is reduced in two ways by the second pressure reducing valve and the third pressure reducing valve at the same time. A two-stage pressure reducing method is adopted to quickly reduce the pressure of the passing gas, and quickly reduce the high-pressure gas entering the inlet end to the low-pressure gas suitable for the human body, and reduce the overall volume of the pressure reducing valve group as much as possible, so as to facilitate handling and carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A top view of a pressure reducing device according to an embodiment of the present invention;

[0017] Figure 2 A rear view of a pressure relief device according to an embodiment of the present invention;

[0018] Figure 3 It is a left side view of the pressure reducing device according to an embodiment of the present invention;

[0019] Figure 4 A structural diagram of a pressure reducing valve body according to an embodiment of the present invention;

[0020] Figure 5 It is a rear view of the pressure reducing valve body of the embodiment of the present invention;

[0021] Figure 6 A cross-sectional view of the structure of a first pressure reducing valve according to an embodiment of the present invention;

[0022] Figure 7 A cross-sectional view of the stamping channel structure of a pressure reducing valve body according to an embodiment of the present invention;

[0023] Figure 8 A partial cross-sectional view of a pressure reducing valve body in a top view according to an embodiment of the present invention;

[0024] Fig. 9 A top sectional view of a pressure reducing valve body according to an embodiment of the present invention;

[0025] Fig.10 A cross-sectional view of the pressure gauge valve group structure of an embodiment of the present invention;

[0026] Fig.11 A top sectional view of a stop valve body according to an embodiment of the present invention;

[0027] Fig.12 It is a side sectional view of a stop valve body according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1-pressure reducing valve group, 2-pressure gauge valve group, 3-stop valve group;

[0030] 11-first pressure reducing valve, 12-second pressure reducing valve, 13-third pressure reducing valve, 14-pressure reducing valve body, 21-pressure gauge valve body, 22-pressure gauge valve wheel, 23-pressure gauge connector, 31-stop valve body;

[0031] 111-cover body, 112-base, 113-pressure reducing rod, 141-first pressure reducing valve hole, 142-second pressure reducing valve hole, 143-third pressure reducing valve hole, 144-first air inlet, 145-stop valve hole, 146-first air outlet, 148-first pressure gauge valve hole, 211-air inlet channel, 311-fifth stop valve hole, 312-sixth stop valve hole, 313-air outlet channel, 314-first safety valve hole, 315-second safety valve hole, 316-mounting head;

[0032] 1111-upper cover, 1112-blocking cover, 1113-diaphragm, 1114-connecting screw plate, 1115-piston plate, 1121-base spring, 1122-bottom cover, 1123-valve seat screw cover, 1124-sealing seat, 1125-fixed seat, 1131-balance spring, 1132-pressure reducing valve seat, 1133-top rod, 1411-air chamber, 1412-cover mounting hole, 1413-base mounting hole, 1 441-main air inlet, 1442-charging channel, 1451-first stop valve hole, 1452-second stop valve hole, 1454-fourth stop valve hole, 1471-first air passage, 1472-second air passage, 1473-third air passage, 1474-fourth air passage, 1475-fifth air passage, 1476-sixth air passage, 1477-seventh air passage, 1478-ninth air passage. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0034] The examples represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this article, each embodiment may be represented individually or collectively by the term "invention", which is merely for convenience, and if more than one invention is in fact disclosed, it is not intended to automatically limit the scope of the application to any single invention or inventive concept.

[0035] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method or device including a series of elements includes not only those elements, but also other elements not explicitly listed. The various embodiments herein are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the structures, products, etc. disclosed in the embodiments, since they correspond to the parts disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0036] A coordinate system XYZ is set in this article, wherein the positive direction of the Z axis represents the top, the negative direction of the Z axis represents the bottom, the positive direction of the Y axis represents the front, the negative direction of the Y axis represents the back, the positive direction of the X axis represents the left, and the negative direction of the X axis represents the right.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] The embodiment of the present invention provides a decompression device. In this embodiment, Figure 1-3 As shown, it includes a pressure reducing valve group 1, a pressure gauge valve group 2 and a stop valve group 3, the pressure gauge valve group 2 is arranged at the inlet end of the pressure reducing valve group 1, the pressure gauge valve group 2 is used to display the pressure of the gas at the inlet end of the pressure reducing valve group 1, the stop valve group 3 is arranged at the outlet end of the pressure reducing valve group 1, the stop valve group 3 is used to open or close the gas delivery at the outlet end of the pressure reducing valve group 1, and a first pressure reducing valve 11, a second pressure reducing valve 12 and a third pressure reducing valve 13 are arranged on the pressure reducing valve group 1, the first pressure reducing valve 11 is arranged on a side of the pressure reducing valve group 1 close to the pressure gauge valve group 2, the first pressure reducing valve 11 is used to reduce the high-pressure gas entering through the pressure gauge valve group 2 to medium-pressure gas, the second pressure reducing valve 12 and the third pressure reducing valve 13 are arranged side by side on a side of the pressure reducing valve group 1 close to the stop valve group 3, the second pressure reducing valve 12 and the third pressure reducing valve 13 are used to jointly reduce the medium-pressure gas transmitted from the first pressure reducing valve to low-pressure gas.

[0039] The pressure reducing device in this embodiment includes a pressure gauge valve group 2, a pressure reducing valve group 1 and a stop valve group 3. The pressure gauge valve group 2 enables the pressure reducing device to monitor the pressure and input amount of the input gas, and the stop valve group 3 enables the pressure reducing device to control the output amount of the output gas, so that the user can monitor the gas pressure output by the air system in real time to judge the gas remaining in the air system, and control the gas output amount of the pressure reducing device, so that the pressure reducing device can meet the needs of different number of people. In actual use, one pressure reducing device can provide breathing for more than 80 people, and the output amount can be reduced by adjusting the output amount to meet the needs of different number of people, thereby reducing The gas in the air-less system is used to extend the rescue time. At the same time, the first pressure reducing valve 11 on the pressure reducing valve group 1 is arranged at the front end, and the second pressure reducing valve 12 and the third pressure reducing valve 13 are arranged side by side at the rear end. The gas input is reduced in pressure by the first pressure reducing valve 11 and then reduced in pressure by two ways through the second pressure reducing valve 12 and the third pressure reducing valve 13 at the same time. A two-stage pressure reducing method is adopted to quickly reduce the pressure of the passing gas, and the high-pressure gas entering the inlet end is quickly reduced to a low-pressure gas suitable for the human body. The triangular arrangement of the first pressure reducing valve 11, the second pressure reducing valve 12 and the third pressure reducing valve 13 can reduce the overall volume of the pressure reducing valve group 1 as much as possible, which is convenient for handling and carrying.

[0040] In this embodiment, combined with Figure 4 and Figure 5 As shown, the pressure reducing valve group 1 includes a pressure reducing valve body 14, and the first pressure reducing valve 11, the second pressure reducing valve 12 and the third pressure reducing valve 13 are all installed on the pressure reducing valve body 14, wherein the pressure reducing valve body 14 is a hollow structure, and is provided with a first pressure reducing valve hole 141, a second pressure reducing valve hole 142, a third pressure reducing valve hole 143, a first air inlet 144, a stop valve hole 145 and a first air outlet 146, the first pressure reducing valve 11, the second pressure reducing valve 12 and the third pressure reducing valve 13 are correspondingly installed on the first pressure reducing valve hole 141, the second pressure reducing valve hole 142 and the third pressure reducing valve hole 143, the first air inlet 144 is connected with the first pressure reducing valve hole 141, and the second pressure reducing valve hole 142 and the third pressure reducing valve hole 143 are connected with the first pressure reducing valve hole 141.

[0041] The first pressure reducing valve hole 141 passes through the upper and lower surfaces of the pressure reducing valve body 14 . The first pressure reducing valve 11 adopts a plug-in structure and can be quickly installed in the first pressure reducing valve hole 141 to facilitate component replacement. The first pressure reducing valve 11 includes a cover body 111 , a base 112 and a pressure reducing rod 113 .

[0042] Among them, combined Figure 6 As shown, the cover body 111 includes an upper cover 1111, a blind cover 1112, a diaphragm 1113, a connecting screw disc 1114, and a piston disc 1115. The base 112 includes a base spring 1121, a bottom cover 1122, a valve seat screw cover 1123, a sealing seat 1124, and a fixing seat 1125. The pressure relief rod 113 includes a balance spring 1131, a pressure relief valve seat 1132, and a push rod 1133. The first pressure relief valve hole 141 includes a cover body mounting hole 1412, a gas chamber 1411, and a base mounting hole 1413.

[0043] The fixed seat 1125 is arranged in the air chamber 1411, and a thread is arranged at the lower end of the fixed seat 1125. A thread matching the thread at the lower end of the fixed seat 1125 is arranged at the upper end of the valve seat screw cover 1123. The fixed seat 1125 is connected with the valve seat screw cover 1123 through threads, and a sealing seat mounting hole is arranged in the middle of the upper end of the valve seat screw cover 1123. The sealing seat 1124 is installed at the upper end of the valve seat screw cover 1123 and sealed at the lower end of the fixed seat 1125 to ensure the sealing between the fixed seat 1124 and the valve seat screw cover 1123.

[0044] The sealing seat 1124, the valve seat screw cover 1123 and the fixed seat 1125 have a through hole in the middle, and a push rod 1133 is inserted in the through hole. The push rod 1133 includes a cylindrical shaft at the upper end and a conical frustum at the lower end, wherein the small end of the frustum is connected to the shaft, that is, the frustum is a structure with a large top and a small bottom. When not in operation, the small end of the frustum is pressed against the lower end of the middle through hole of the sealing seat 1124 to seal the through hole in the middle of the sealing seat 1124. The frustum of the push rod 1133 is inside the valve seat screw cover 1123, and the valve seat screw cover 1123 is arranged in the base mounting hole 1413. A bottom cover 1122 is arranged below the valve seat screw cover 1123, and a base spring 1121 is arranged at the lower end of the frustum, and one end of the base spring 1121 is pressed against the lower end of the push rod 1133, and the other end is pressed against the bottom cover 1122. Preferably, the bottom cover 1122 is also provided with a drainage hole. When water accumulates in the pipeline, the bottom cover 1122 can be loosened and the accumulated water can be discharged through the drainage hole.

[0045] The upper end of the push rod 1133 is connected to the piston disc 1115, and a diaphragm 1113 is arranged above the piston disc 1115. An upper cover 1111 is arranged above the diaphragm 1113, and the upper cover 1111 is fixed on the upper end surface of the pressure reducing valve body 14. A sealing cover 1112 is arranged between the upper cover 1111 and the diaphragm 1113. The sealing cover 1112 is sealedly connected to the upper cover 1111, so that an air bag chamber is formed inside the upper cover 1111, and the air bag chamber is connected to the inlet end of the pressure reducing valve body 14, that is, the first air inlet 144, through the charging channel 1442, which is used for inflating the air bag chamber. A connecting screw disc 1114 is arranged below the piston disc 1115, and the connecting screw disc 1114 is above the air chamber 1411. A vent is provided on the connecting screw disc 1114, and the vent is communicated with the air chamber 1411. The cover 1112 is provided with a damping hole. When the compressed air in the airbag chamber passes through the damping hole on the cover 1112 and acts on the diaphragm 1113, the diaphragm 1113 is driven to push the piston disc 1115 downward, so that the push rod 1133 moves downward, and the convex cone on the push rod 1133 is separated from the sealing seat 1124 to form a throttle. The middle of the connecting screw disc 1114 is matched with the pressure reducing valve seat 1132. A balance spring 1131 is provided between the pressure reducing valve seat 1132 and the piston disc 1115. The balance spring 1131 is sleeved on the outer side of the upper end of the push rod 1133.

[0046] Combination Figure 7As shown, the first air inlet 144 includes a main air inlet 1441 and a pressure-charging channel 1442. The main air inlet 1441 is connected to the base mounting hole 1413. The pressure-charging channel 1442 branches out from one side of the main air inlet 1441 and is arranged on one side of the first pressure reducing valve hole 141. A first needle valve core is arranged between the pressure-charging channel 1442 and the main air inlet 1441, which is used to cut off or connect the main air inlet 1441 and the pressure-charging channel 1442. A second needle valve core is arranged on the side of the upper cover 1111, that is, between the pressure-charging channel 1442 and the airbag chamber, which is used to cut off or connect the pressure-charging channel 1442 and the airbag chamber. A steel ball, a pressure relief spring and a screw plug are arranged at the bottom end of the pressure-charging channel 1442, which are used to adjust the internal pressure of the stamping channel 1442.

[0047] The pressure reducing device is pressure-regulated before use, or it can be uniformly pressure-regulated after production is completed, that is, the first needle valve core and the second needle valve core are adjusted so that the pressure at the outlet of the first pressure reducing valve 11 meets the use requirements. The upper cover 1111 and the blind cover 1112 constitute the airbag chamber of the first pressure reducing valve 11, so that the first pressure reducing valve 11 is not affected by external pressure when regulating the pressure; the upper cover 1111 and the blind cover 1112 have a heat-insulating coating on the surface, so that the use of the first pressure reducing valve 11 is not affected by external temperature within a certain time range. Specifically, when the first pressure reducing valve 11 is pressure-regulated, first slowly loosen the two needle valve cores to allow the air at the inlet end of the pressure reducing valve group 1 to enter the airbag chamber. Observe the corresponding pressure gauge value on the pressure gauge valve group 2. When the pressure gauge value reaches the specified value, tighten the upper cover 1111 and the two needle valve cores on the pressure reducing valve group 1 in turn. A steel ball, a pressure relief spring and a screw plug are installed at the bottom end of the side of the pressure reducing valve group 1 to adjust the charging pressure. When the pressure in the airbag chamber exceeds the set value during the charging process, the gas medium will push the steel ball to compress the pressure relief spring and be discharged from the hole in the middle of the screw plug.

[0048] The first pressure reducing valve 11 acts on the diaphragm 1113 through the damping hole on the cover 1112 through the compressed air in the airbag chamber, driving the diaphragm 1113 to push the piston disc 1115 downward, so that the push rod 1133 also moves downward and separates from the sealing seat 1124 to form a throttle. The air medium enters the inlet end of the first pressure reducing valve 11 through the main air inlet 14413, wherein the inlet end of the first pressure reducing valve 11 is arranged on the valve seat screw cover 1123, and the throttle effect is generated through the throttle of the sealing seat 1124, so that the pressure of the gas medium changes, and flows through the connecting screw disc 1114, and acts on the piston disc 1115 to generate an upward force and exert on the diaphragm 1113. After this force and the force of the airbag chamber on the diaphragm 1113 are balanced, the push rod 1133 no longer moves, so that the push rod 1133 and the sealing seat 1124 maintain a certain opening, ensuring the stability of the pressure of the air chamber 1411 in the first pressure reducing valve hole 141.

[0049] Among them, the second pressure reducing valve hole 142 and the third pressure reducing valve hole 143 are arranged side by side on the right side of the first pressure reducing valve hole 141, and are connected with the first pressure reducing valve hole 141. The second pressure reducing valve hole 142 and the third pressure reducing valve hole 143 form an isosceles triangle structure, that is, the distance from the center of the first pressure reducing valve 141 to the center of the second pressure reducing valve hole 142 is the same as the distance from the center of the first pressure reducing valve 141 to the center of the third pressure reducing valve hole 143. The diameters of the second pressure reducing valve hole 142 and the third pressure reducing valve hole 143 are slightly smaller than those of the first pressure reducing valve hole 141, and the corresponding structures of the second pressure reducing valve 12 and the third pressure reducing valve 13 are also correspondingly reduced, but the principles and structures of the second pressure reducing valve 12 and the third pressure reducing valve 13 are the same as those of the first pressure reducing valve 11, so they are not repeated here.

[0050] The pressure reducing valve body 14 includes a first part and a second part, wherein the first part and the second part are both rectangular block structures, the width of the first part is smaller than that of the second part, the first pressure reducing valve hole 141 is installed on the first part, and the second pressure reducing valve hole 142 and the third pressure reducing valve hole 143 are installed on the second part, wherein the width of the first part is the same as the maximum width of the upper cover 1111 of the first pressure reducing valve 11, and the width of the second part is the same as the sum of the widths of the upper cover of the second pressure reducing valve 12 and the upper cover of the third pressure reducing valve 13. In this embodiment, the width of the first part is between 125mm-140mm, and the width of the second part is between 215mm-225mm, wherein the width of the first part and the second part is the distance in the Y-axis direction of the figure, and the length of the pressure reducing valve body 14, that is, the length of the first part plus the length of the second part is between 280mm-290mm, wherein the length of the pressure reducing valve body 14 is the distance in the X-axis direction of the figure. In actual use, the user is in a dangerous situation, and there are many rooms with air systems, and it is impossible to predict whether the rooms with air systems can be used in the event of danger. Therefore, the pressure reducing device needs to be as small and convenient as possible to facilitate users to move and use it in crisis situations.

[0051] A plurality of stop valve holes 145 are provided on the side of the pressure reducing valve body 14, including a first stop valve hole 1451, a second stop valve hole 1452, a third stop valve hole and a fourth stop valve hole 1454, wherein the first stop valve hole 1451 and the second stop valve hole 1452 are respectively provided at the inlet ends of the second pressure reducing valve 12 and the third pressure reducing valve 13, and the third stop valve and the fourth stop valve hole 1454 are respectively provided at the outlet ends of the second pressure reducing valve 12 and the third pressure reducing valve 13, and stop valves are provided on the first stop valve hole 1451, the second stop valve hole 1452, the third stop valve hole and the fourth stop valve hole 1454, and the input and output amounts of the gas of the second pressure reducing valve 12 and the third pressure reducing valve 13 are controlled by the stop valves, thereby limiting the flow inside the pressure reducing valves and adjusting the number of applicable personnel.

[0052] Further, the first stop valve hole 1451 and the third stop valve hole are arranged on the front side of the pressure reducing valve body 14, and the second stop valve hole 1452 and the fourth stop valve hole are arranged on the rear side of the pressure reducing valve body 14. The centers of the first stop valve hole 1451 and the third stop valve hole are not on the same horizontal plane, wherein the horizontal plane is parallel to the plane formed by the XY axis. Further, the first stop valve hole 1451 is arranged close to the lower surface of the pressure reducing valve body 14, and the third stop valve hole is arranged close to the upper surface of the pressure reducing valve 14. Similarly, the second stop valve hole 145 The arrangement mode of the first stop valve hole 1451 and the fourth stop valve hole is the same as the installation mode of the first stop valve hole 1451 and the third stop valve hole, that is, they are staggered, compressing the distance between the first stop valve hole 1451 and the third stop valve hole or the distance between the second stop valve hole 1452 and the fourth stop valve hole, thereby reducing the distance between the first pressure reducing valve hole 141 and the second pressure reducing valve hole 142 and the third pressure reducing valve hole 143, so that the volume of the pressure reducing valve body 14 is reduced as much as possible, which is convenient for users to carry and reduces physical exertion during carrying.

[0053] Combination Figure 5 , Figure 8 and Fig. 9 As shown, the pressure reducing valve body 14 is provided with a plurality of gas passages connecting the valve holes, so that the gas medium can smoothly enter from the first gas inlet 144 of the pressure reducing valve body 14 and be output from the first gas outlet 146, including the first gas passage 1471, the second gas passage 1472, the third gas passage 1473, the fourth gas passage 1474, the fifth gas passage 1475, the sixth gas passage 1476, the seventh gas passage 1477, the eighth gas passage and the ninth gas passage 1478.

[0054] The first air passage 1471 is horizontally arranged and connects the first air inlet 144 and the first pressure reducing valve hole 141. Specifically, one end of the first air passage 1471 is connected to the main air inlet 1441, and the other end is connected to the base mounting hole 1413. The connecting position of the first air passage 1471 and the base mounting port 1413 corresponds to the installation position of the valve seat screw cover 1123. The gas entering the first air passage 1471 directly enters the valve seat screw cover 1123.

[0055] The second gas passage 1472 is arranged on one side of the first pressure reducing valve hole 141, and one end of the second gas passage 1472 is connected to the first pressure reducing valve hole 141, and the other end is connected to the third gas passage 1473 and the fourth gas passage 1474 respectively. Specifically, one end of the second gas passage 1472 is connected to the gas chamber 1411, and the gas medium in the gas chamber 1411 is transported to the third gas passage 1473 and the fourth gas passage 1474 through the second gas passage 1472. The second gas passage 1472 is arranged obliquely. Specifically, the gas passage 1472 The angle between 1472 and the horizontal plane is between 40° and 50°. If the angle of the air passage 1472 is outside 40° and 50°, the structural design of the pressure reducing valve body 14 will be unreasonable, and the structure of the pressure reducing valve body 14 cannot be reduced to the extreme, resulting in inconvenience for users when using it. In this embodiment, the angle of the second air passage 1472 is set to 45°, which minimizes the distance of the second air passage 1472, thereby reducing the overall structure of the pressure reducing valve body 14 and reducing the weight of the pressure reducing valve body 14.

[0056] One end of the third air passage 1473 and the fourth air passage 1474 are respectively connected with the right end of the second air passage 1472 to form a three-way structure, and the other end of the third air passage 1473 and the fourth air passage 1474 are respectively connected with the first stop valve hole 1451 and the second stop valve hole 1452, wherein the third air passage 1473 and the fourth air passage 1474 are both horizontally arranged to facilitate the processing operation of the pressure reducing valve body.

[0057] One end of the fifth air passage 1475 is connected to the first stop valve 1451, and the other end is connected to the second pressure reducing valve hole 142. One end of the sixth air passage 1476 is connected to the second stop valve 1452, and the other end is connected to the third stop valve 143. The fifth air passage 1475 and the sixth air passage 1476 are horizontally arranged and perpendicular to the third air passage 1473 or the fourth air passage 1474.

[0058] One end of the seventh air passage 1477 is connected to the second pressure reducing valve hole 142, and the other end is connected to the third stop valve hole. One end of the eighth air passage is connected to the third pressure reducing valve hole 143, and the other end is connected to the fourth stop valve hole 1454. Among them, the seventh air passage 1477 and the eighth air passage are parallel to the fifth air passage 1475 or the sixth air passage 1476.

[0059] A ninth air passage 1478 is provided between the third stop valve hole and the fourth stop valve hole 1454. Both ends of the ninth air passage 1478 are respectively connected with the third stop valve hole and the fourth stop valve hole 1454. The ninth air passage 1478 is parallel to the third air passage 1473 or the fourth air passage 1474. The middle part of the ninth air passage 1478 is connected with the first air outlet 146. The first air outlet 146 is perpendicular to the ninth air passage 1478. A rational design of the plurality of air passages 147 can greatly reduce the volume of the pressure reducing valve body 14 and reduce the physical exertion of the user during carrying.

[0060] Furthermore, a first pressure gauge valve hole 148 is provided on the upper surface of the pressure reducing valve body 14, wherein the first pressure gauge valve hole 148 is provided at the outlet end of the pressure reducing valve body 14, that is, it is provided above the ninth air passage 1478, and passes through the ninth air passage 1478. The pressure gauge is directly installed on the first pressure gauge valve hole 148 to monitor the gas pressure inside the ninth air passage 1478, so as to ensure that the gas output from the outlet end of the pressure reducing valve body is within an acceptable range for the human body, and to avoid personal injury caused by excessive output pressure.

[0061] Combination Figure 5 and 10 As shown, the pressure gauge valve group 2 includes a pressure gauge valve body 21 and a pressure gauge valve wheel 22. The pressure gauge valve body 21 includes a first connection part, a second connection part and a pressure gauge valve mounting part, wherein the first connection part and the second connection part are provided with threads, the first connection part is connected to the first air inlet 144 of the pressure reducing valve group 1, and the first air inlet 144 of the pressure reducing valve group 1 is provided with corresponding threads, the first connection part is connected to the first air inlet 144 by threads, and the second connection part is also provided with threads, and the second connection part is used to connect with the external air system through a pipeline, so as to receive the air output from the air system, and an air intake channel 211 is provided inside the pressure gauge valve body 21, the air intake channel 211 is provided in the first connection part and the second connection part, passes through both ends of the first connection part and the second connection part, and the air intake channel 211 near the first connection part is enlarged to be in the shape of an outward bell mouth, and at the same time, one end of the first air inlet 144 near the first connection part is also provided in the shape of an outward bell mouth, and an enlarged cavity is provided between the first connection part and the first air inlet 144 after the two are connected. A first mounting hole is provided on the pressure gauge valve mounting portion. The first mounting hole extends from the upper surface of the pressure gauge valve body 21, that is, the upper surface of the pressure gauge valve mounting portion, to the air inlet channel 211 and is connected to the air inlet channel 211. The pressure gauge valve wheel 22 is directly mounted on the air inlet channel 211. The pressure gauge valve wheel 22 includes a wheel disc and a plunger. The wheel disc rotates to drive the plunger to move up and down, so that the first mounting hole is connected to or blocked from the air inlet channel 211. Figure 3As shown, the pressure gauge valve body 21 also includes a pressure gauge connector 23, which is connected to the middle of the first mounting hole. A pressure gauge is installed on the pressure gauge connector 23. By rotating the pressure gauge valve wheel 22, the pressure gauge connector 23 and the air intake passage 211 are connected or blocked, so as to detect the gas pressure in the air intake passage 211, and only the gas pressure output by the air system is detected.

[0062] Combination Figure 2 , Fig.11 and Fig.12 As shown, the stop valve assembly 3 includes a stop valve body 31, a stop valve 32 and a safety valve, wherein a fifth stop valve hole 311 and a sixth stop valve hole 312 are arranged on the upper surface of the stop valve body 31, and stop valves are arranged in the fifth stop valve hole 311 and the sixth stop valve hole 312, wherein the stop valves can be directly inserted into the fifth stop valve hole 311 and the sixth stop valve hole 312 through a plug-in structure, and are fixed to the upper surface of the stop valve body 31 by bolts. In this embodiment, the wheel discs of the stop valves on the fifth stop valve hole 311 and the sixth stop valve hole 312 have different heights and are in a stepped structure, thereby avoiding interference between the wheel discs of the two stop valves and reducing the distance between the two stop valves and the volume of the stop valve body 31.

[0063] The stop valve body 31 includes a mounting end, which is mounted on the first air outlet 146, and the two are connected by threads. An air outlet channel 313 is arranged in the mounting end, and the air outlet channel 313 is coaxial with the first air outlet 146, and one end is connected to the first air outlet 146, and the other end of the air outlet channel 313 is provided with a fork, which is divided into two channels respectively connected to the fifth stop valve hole 311 and the sixth stop valve hole 312, and a first safety valve hole 314 and a second safety valve hole 315 are respectively arranged on the two sides of the stop valve body 31, the first safety valve hole 314 is connected to the fifth stop valve hole 311, and the second safety valve hole 315 is connected to the sixth stop valve hole 312, and safety valves are installed on the first safety valve hole 314 and the second safety valve hole 315, which are used to reduce the pressure of the gas passing through when the gas pressure in the stop valve body 31 is too high, so as to further protect the safety of users and avoid inhaling uncomfortable and human-used gases to cause physical harm. A second air outlet and a third air outlet are arranged at the lower ends of the fifth stop valve hole 311 and the sixth stop valve hole 312, and a mounting head 316 is arranged at the ends of the second air outlet and the third air outlet. The mounting head 316 is provided with a thread, so that the mounting head 316 is connected to the connecting end of the breathing mask through a thread, or is connected to an integrated breathing mask group through the mounting head 316. The breathing mask group includes multiple masks and can be used by multiple people at one time.

[0064] Preferably, the input air pressure at the inlet end of the pressure reducing valve group 1 is between 25MPa-40MPa, the output air pressure at the output end of the first pressure reducing valve 11 is between 3.5MPa-15MPa, and the output air pressure at the outlet end of the pressure reducing valve group 1 is less than or equal to 0.7MPa. By gradually reducing the air pressure, the high air pressure is quickly reduced to a low air pressure suitable for human use.

[0065] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A pressure reducing device, characterized in that: The invention comprises a pressure reducing valve group (1), a pressure gauge valve group (2) and a stop valve group (3), wherein the pressure gauge valve group (2) is arranged at the inlet end of the pressure reducing valve group (1), the stop valve group (3) is arranged at the outlet end of the pressure reducing valve group (1), and the stop valve group (3) is used to open or close the gas delivery at the outlet end of the pressure reducing valve group (1). The pressure reducing valve group (1) comprises a first pressure reducing valve (11), a second pressure reducing valve (12) and a third pressure reducing valve (13), wherein the first pressure reducing valve (11) is arranged at the inlet end of the pressure reducing valve group (1), and the stop valve group (3) is used to open or close the gas delivery at the outlet end of the pressure reducing valve group (1). The pressure reducing valve group (1) is located on a side close to the pressure gauge valve group (2); the first pressure reducing valve (11) is used to reduce the pressure of high-pressure gas entering through the pressure gauge valve group (2) to medium-pressure gas; the second pressure reducing valve (12) and the third pressure reducing valve (13) are arranged on a side of the pressure reducing valve group (1) close to the stop valve group (3); the second pressure reducing valve (12) and the third pressure reducing valve (13) are used to jointly reduce the pressure of the medium-pressure gas transmitted by the first pressure reducing valve (11) to low-pressure gas; The pressure reducing valve assembly (1) further comprises a pressure reducing valve body (14), the pressure reducing valve body (14) being a hollow structure, and being provided with a first pressure reducing valve hole (141), a second pressure reducing valve hole (142) and a third pressure reducing valve hole (143); the first pressure reducing valve (11), the second pressure reducing valve (12) and the third pressure reducing valve (13) are respectively installed in the first pressure reducing valve hole (141), the second pressure reducing valve hole (142) and the third pressure reducing valve hole (143); the distance from the center of the first pressure reducing valve (11) to the center of the second pressure reducing valve hole (142) and the distance from the center of the first pressure reducing valve (11) to the center of the third pressure reducing valve hole (143) are the same; The pressure reducing valve body (14) is further provided with a first stop valve hole (1451), a second stop valve hole (1452), a third stop valve hole and a fourth stop valve hole (1454); the first stop valve hole (1451) and the second stop valve hole (1452) are respectively arranged at the inlet ends of the second pressure reducing valve (12) and the third pressure reducing valve (13); the third stop valve hole and the fourth stop valve hole (1454) are respectively arranged at the outlet ends of the second pressure reducing valve (12) and the third pressure reducing valve (13); the first stop valve hole (1451), the second stop valve hole (1452), the third stop valve hole and the fourth stop valve hole (1454) are used to install stop valves to control the gas input and output of the second pressure reducing valve (12) and the third pressure reducing valve (13); The pressure reducing valve body (14) is also provided with a first pressure gauge valve hole (148), which is arranged at the outlet end of the pressure reducing valve body (14), and a pressure gauge is installed on the first pressure gauge valve hole (148).

2. The pressure reducing device according to claim 1, characterized in that: The centers of the first stop valve hole (1451) and the third stop valve hole are located on different horizontal planes, and the centers of the second stop valve hole (1452) and the fourth stop valve hole (1454) are located on different horizontal planes.

3. The pressure reducing device according to claim 1, characterized in that: The pressure gauge valve group (2) comprises a pressure gauge valve body (21) and a pressure gauge valve wheel (22); the pressure gauge valve body (21) comprises a first connection portion, a second connection portion, a pressure gauge valve mounting portion and a pressure gauge connector (23); the first connection portion is connected to the inlet end of the pressure reducing valve group (1); the second connection portion is used to connect to an external air system; the pressure gauge valve mounting portion is used to mount the pressure gauge valve wheel (22); the pressure gauge connector (23) is used to mount a pressure gauge; and the pressure gauge valve wheel (22) is used to control the switch of the pressure gauge.

4. The pressure reducing device according to claim 3, characterized in that: The pressure gauge valve body (21) is provided with an air intake channel (211) and a first mounting hole, the first mounting hole is in communication with the air intake channel (211), the pressure gauge connector (23) is in communication with the first mounting hole, and the pressure gauge valve wheel (22) is mounted in the first mounting hole and is used to open or block the gas flow between the air intake channel (211) and the pressure gauge connector (23).

5. The pressure reducing device according to claim 3, characterized in that: The stop valve assembly (3) comprises a stop valve body (31), a stop valve and a safety valve. The safety valve is installed on both sides of the stop valve body (31) and is connected to the stop valve for relieving the pressure exceeding the standard of the stop valve. The stop valve is installed on the upper side of the stop valve body (31) for controlling the output of gas.

6. The pressure reducing device according to claim 5, characterized in that: The stop valve body (31) is provided with an air outlet channel (313), a fifth stop valve hole (311) and a sixth stop valve hole (312); the fifth stop valve hole (311) and the sixth stop valve hole (312) are used to install the stop valve; one end of the air outlet channel (313) is connected to the outlet end of the pressure reducing valve group (1); the other end is provided with a bifurcation; the two channels of the bifurcation are respectively connected to the fifth stop valve hole (311) and the sixth stop valve hole (312).

7. The pressure reducing device according to any one of claims 1 to 6, characterized in that: The input air pressure at the inlet end of the pressure reducing valve group (1) is between 25MPa and 40MPa, the output air pressure at the output end of the first pressure reducing valve (11) is between 3.5MPa and 15MPa, and the output air pressure at the outlet end of the pressure reducing valve group (1) is less than or equal to 0.7MPa.

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