Two-stage pressure reduction bottled liquefied gas pressure regulator

Abstract

The utility model relates to the technical field of bottled liquefied gas pressure regulators, in particular to a two-stage pressure reduction bottled liquefied gas pressure regulator. The device comprises a fixed shell and a sealing cover arranged at an opening in the top of the fixed shell, an air outlet pipe communicated with the fixed shell is arranged on the right side wall of the fixed shell, a positioning pipe is vertically arranged in the center of the bottom of the fixed shell, and an air inlet pipe is arranged at the bottom of the left side wall of the fixed shell. And the positioning pipe is communicated with the inner end of the air inlet pipe through a communicating pipe arranged at the bottom of the fixed shell. The pressure regulator is compact in structural design, can be conveniently installed on a steel cylinder, is small in size and mass, does not topple over the steel cylinder and is not interfered by a guardrail, a two-stage pressure reduction mode is adopted, the pressure regulating mechanisms are all arranged in the body, the pressure in the pressure regulator is controllable, the use safety is guaranteed to a great extent, disassembly and adjustment by a user can be effectively prevented, and the use safety is improved. The use safety is further improved, and the problems in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bottled liquefied gas pressure regulators, in particular to a two-stage pressure-reducing bottled liquefied gas pressure regulator. Background Art

[0002] Currently, the vast majority of bottled liquefied gas pressure regulators marketed as high-flow-rate regulators fail to comply with the national product standard GB35844-2018, either regulated at excessively high pressures or with falsely inflated nominal flow rates (the actual flow rate is far from achieved). In particular, bottled liquefied gas pressure regulators require an inlet pressure range of 0.03MPa to 1.56MPa and an outlet pressure of 2.8kPa or 5.0kPa, resulting in a significant inlet-outlet pressure ratio. Furthermore, existing bottled liquefied gas flow rates can only reach the 1.2m³ / h specified in GB35844, a relatively low flow rate that can only meet the needs of households and a small number of commercial applications, limiting their scope of application.

[0003] Clearly, commercially available pressure regulators are unable to simultaneously maintain flow and achieve pressure compliance with national standards. Some pressure regulator manufacturers, in order to cater to user demands for high flow rates, make their regulators adjustable, but this sacrifices pressure regulation, resulting in excessive outlet pressure, posing a significant safety hazard. Additionally, some pressure regulators on the market utilize two-stage pressure reduction. However, these are either bulky or heavy, making them prone to tipping over when installed on cylinders or interfering with the cylinder's guardrails, making them unsuitable for installation on liquefied gas cylinders. Alternatively, the first-stage pressure regulator is mounted externally, posing a significant risk of leakage and failing to prevent user disassembly and adjustment. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a two-stage pressure-reducing bottled liquefied gas pressure regulator. The utility model has a compact structure and can be conveniently installed on a steel cylinder. It has a small volume and mass, will not cause the steel cylinder to fall over, and will not be interfered with by guardrails. It adopts a two-stage pressure reduction method, and the pressure regulating mechanisms are all arranged in the body. The first-stage pressure regulating mechanism can adjust the intake pressure to 0.03-0.2MPa, thereby reducing the inlet and outlet pressure ratio. The second-stage pressure regulating mechanism can expand the ventilation area, thereby increasing the flow rate of the bottled liquefied gas, so that it can reach 2.0m3 / h specified in GB35844, to meet the needs of most consumers and expand the scope of application. In addition, the pressure in the pressure regulator is controllable, which greatly ensures the safety of use, and can effectively prevent the user from disassembling and adjusting, further improving the safety of use, and solving the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A two-stage pressure-reducing bottled liquefied gas pressure regulator comprises a fixed shell and a sealing cover arranged at the top opening of the fixed shell, an air outlet pipe connected to the fixed shell is provided on the right side wall of the fixed shell, a positioning pipe is vertically provided in the center of the bottom of the fixed shell, an air inlet pipe is provided at the bottom of the left side wall of the fixed shell, the positioning pipe is connected to the inner end of the air inlet pipe through a connecting pipe arranged at the bottom of the fixed shell, a first-level pressure regulating mechanism cooperating with the positioning pipe is provided at the bottom of the inner wall of the fixed shell, and a second-level pressure regulating mechanism is provided in the fixed shell above the first-level pressure regulating mechanism.

[0007] Optionally, the first-stage pressure regulating mechanism includes a sealing base riveted to the bottom opening of the positioning tube, the sealing base is arranged below the connecting tube, a first valve seat is arranged in the sealing base, the first valve seat is fixed in the sealing base by a first spring, a valve core is vertically arranged on the first valve seat, and a first rubber gasket sleeved on the valve core is arranged in the first valve seat; a support tube is vertically arranged at the bottom of the inner wall of the fixed housing, a limiting collar is clamped on the inner wall of the support tube, and support plates are symmetrically provided on the front and rear sides of the inner wall of the limiting collar, a first elastic sensing plate is arranged in the support tube, the outer edge of the bottom of the first elastic sensing plate abuts against the top of the limiting collar, the middle part of the plate is recessed downward and abuts against the two support plates, a pressing piece is provided in the middle of the first elastic sensing plate, a through hole is provided in the bottom of the fixed housing corresponding to the central position of the support tube, the upper end of the valve core movably passes through the through hole and cooperates with the pressing piece, a limiting cover is riveted in the support tube abutting against the top edge of the first elastic sensing plate, and a second spring sleeved on the pressing piece is provided between the limiting cover and the first elastic sensing plate.

[0008] Optionally, the down-pressing member includes a down-pressing plate arranged below the first elastic sensing piece, a down-pressing groove is provided in the center of the bottom of the down-pressing plate, the upper end of the valve core is movably clamped in the down-pressing groove, a stud movably passing through the center of the first elastic sensing piece is provided in the middle of the surface of the down-pressing plate, and a nut is threadedly connected to the stud, and its bottom abuts against the surface of the first elastic sensing piece.

[0009] Optionally, a sealing ring is sleeved on the stud between the nut and the first elastic sensing piece.

[0010] The cam is secured to the left of the valve body and has a locking plate which is secured on the second limit switch to the left of the valve body and is designed to lock the valve body into position when the cam is in the airtight position.

[0011] Optionally, the linkage part is an L-shaped flap, the second valve seat is arranged at the bottom of the vertical section of the L-shaped flap, and the front and rear sides of the vertical section of the L-shaped flap above the second valve seat are symmetrically provided with movable working pins connected to the corresponding side arms, and a long strip hole is opened on the horizontal section of the L-shaped valve plate along its length direction, and an adjusting rod passing through the long strip hole is vertically provided at the bottom of the adjusting seat, and a clamping plate is provided at the bottom end of the adjusting rod.

[0012] Optionally, a sealing ring is provided at the bottom of the limiting collar along its circumference and abuts against the bottom of the inner wall of the fixed shell.

[0013] The utility model adopts the above technical solution, and has the following advantages: compact structural design, can be easily installed on the cylinder, small size and mass, will not cause the cylinder to fall over, and will not be interfered with by the guardrail, adopts a two-stage pressure reduction method, and the pressure regulating mechanisms are all arranged in the body, the first-stage pressure regulating mechanism can adjust the intake pressure to 0.03~0.2MPa, thereby reducing the inlet and outlet pressure ratio, the second-stage pressure regulating mechanism can expand the ventilation area, thereby increasing the flow rate of bottled liquefied gas, so that it can reach 2.0m3 / h specified in GB35844, to meet the needs of most consumers, expand the scope of application, and the pressure in the pressure regulator is controllable, which ensures the safety of use to a great extent, and can also effectively prevent the user from disassembly and adjustment, further improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the top view structure;

[0016] Figure 3 for Figure 2AA-axis cross-sectional structural diagram;

[0017] Figure 4 Schematic diagram of the three-dimensional structure of the limiting collar;

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the L-shaped flap;

[0019] Figure 6 Schematic diagram of the three-dimensional structure of the fixed shell;

[0020] In the figure, 1, fixed housing; 2, sealing cover; 3, air outlet pipe; 4, positioning pipe; 5, air inlet pipe; 6, connecting pipe; 7, sealing base; 8, first valve seat; 9, first spring; 10, valve core; 11, first rubber pad; 12, support pipe; 13, limiting collar; 14, support plate; 15, first elastic sensor plate; 16, through hole; 17, limiting cover; 18, lower pressure plate; 19, lower pressure groove; 20, stud; 21 , nut; 22, sealing gasket; 23, notch; 24, positioning seat; 25, air guide nozzle; 26, support arm; 27, second valve seat; 28, second rubber pad; 29, second elastic sensor plate; 30, adjusting seat; 31, screw; 32, limiting circular plate; 33, third spring; 34, L-shaped flap; 35, pin shaft; 36, long strip hole; 37, adjusting rod; 38, clamping plate; 39, sealing ring; 40, second spring. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0022] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0024] like Figure 1-6 As shown, in this embodiment, a two-stage pressure-reducing bottled liquefied gas pressure regulator includes a fixed shell 1 and a sealing cover 2 arranged at the top opening of the fixed shell 1, an air outlet pipe 3 connected to the fixed shell 1 is provided on the right side wall of the fixed shell 1, a positioning pipe 4 is vertically provided in the center of the bottom of the fixed shell 1, and an air inlet pipe 5 is provided at the bottom of the left side wall of the fixed shell 1. The positioning pipe 4 is connected to the inner end of the air inlet pipe 5 through a connecting pipe 6 arranged at the bottom of the fixed shell 1, a first-level pressure regulating mechanism cooperating with the positioning pipe 4 is provided at the bottom of the inner wall of the fixed shell 1, and a second-level pressure regulating mechanism is provided in the fixed shell 1 above the first-level pressure regulating mechanism.

[0025] Optionally, the first-stage pressure regulating mechanism includes a sealing base 7 riveted to the bottom opening of the positioning tube 4, the sealing base 7 is arranged below the connecting tube 6, a first valve seat 8 is provided in the sealing base 7, the first valve seat 8 is fixed in the sealing base 7 by a first spring 9, a valve core 10 is vertically provided on the first valve seat 8, and a first rubber pad 11 sleeved on the valve core 10 is provided in the first valve seat 8; a support tube 12 is vertically provided at the bottom of the inner wall of the fixed shell 1, a limiting collar 13 is clamped on the inner wall of the support tube 12, and symmetrical support plates 14 are provided on the front and rear sides of the inner wall of the limiting collar 13, and in the support tube 12 A first elastic sensing piece 15 is provided, the outer edge of the bottom of the first elastic sensing piece 15 abuts against the top of the limiting ring 13, the middle part of which is recessed downward and abuts against the two support plates 14, a pressing piece is provided in the middle of the first elastic sensing piece 15, and a through hole 16 is provided at the bottom of the fixed shell 1 corresponding to the central position of the support tube 12. The upper end of the valve core 10 moves through the through hole 16 to cooperate with the pressing piece, and a limiting cover 17 abutting against the top edge of the first elastic sensing piece 15 is riveted in the support tube 12, and a second spring 40 sleeved on the pressing piece is provided between the limiting cover 17 and the first elastic sensing piece 15.

[0026] Optionally, the down-pressing member includes a down-pressing plate 18 arranged below the first elastic sensing piece 15, and a down-pressing groove 19 is provided in the center of the bottom of the down-pressing plate 18. The upper end of the valve core 10 is movably clamped in the down-pressing groove 19, and a stud 20 that movably passes through the center of the first elastic sensing piece 15 is provided in the middle of the surface of the down-pressing plate 18, and a nut 21 is threadedly connected to the stud 20, and its bottom abuts against the surface of the first elastic sensing piece 15.

[0027] Optionally, a sealing ring 22 is provided on the stud 20 between the nut 21 and the first elastic sensing piece 15. The sealing ring 22 can improve the airtightness of the first elastic sensing piece 15 and prevent the gas from flowing out from the gap between the stud 20 and the first elastic sensing piece 15.

[0028] Optionally, the secondary pressure regulating mechanism includes a notch 23 provided on the left side wall of the support tube 12, a positioning seat 24 provided on the limiting collar 13 and clamped on the notch 23, an air guide nozzle 25 provided on the outer side wall of the positioning seat 24 and horizontally penetrating the positioning seat 24 and the limiting collar 13, support arms 26 symmetrically and vertically provided on the positioning seat 24 on the front and rear sides of the air guide nozzle 25, a linkage member movably hinged on the two support arms 26, a second valve seat 27 provided on the linkage member corresponding to the position of the air guide nozzle 25, and a second rubber pad 28 provided in the second valve seat 27 facing the air guide nozzle 25; A second elastic sensing piece 29 is provided in the fixed housing 1 below the sealing cover 2. The edge of the second elastic sensing piece 29 abuts against the boss at the opening of the fixed housing 1, and the sealing cover 2 abuts against the surface of the second elastic sensing piece 29. An adjustment seat 30 is provided in the center of the bottom of the second elastic sensing piece 29. The screw 31 of the adjustment seat 30 passes through the second elastic sensing piece 29 upward and is riveted to a limiting circular plate 32 sleeved on the screw 31. A third spring 33 sleeved on the outside of the screw 31 is provided between the limiting circular plate 32 and the sealing cover 2. The bottom end of the adjustment seat 30 cooperates with the linkage part.

[0029] Optionally, the linkage part is an L-shaped flap 34, and the second valve seat 27 is arranged at the bottom of the vertical section of the L-shaped flap 34. A pin 35 that is movable and clamped on the corresponding side arm 26 is symmetrically provided on the front and rear sides of the vertical section of the L-shaped flap 34 above the second valve seat 27. A long hole 36 is opened along the length direction of the horizontal section of the L-shaped valve plate 34, and an adjusting rod 37 passing through the long hole 36 is vertically provided at the bottom of the adjusting seat 30, and a clamping plate 38 is provided at the bottom end of the adjusting rod 37.

[0030] Optionally, a sealing ring 39 is provided at the bottom of the limiting collar 13 along its circumference, abutting against the bottom of the inner wall of the fixed housing 1. The sealing ring 39 can enhance the airtightness between the limiting collar 13 and the bottom of the fixed housing 1 to prevent gas from flowing out from there.

[0031] When the device is in use, gas enters the fixed housing 1 through the intake pipe 5, passes through the connecting pipe 6, and enters the positioning pipe 4. Then, through the through-hole 16, it enters the limiting collar 13 below the first elastic sensor plate 15. As the gas continues to enter, the air pressure within the limiting collar 13 increases, causing the first elastic sensor plate 15 to deform and arch upward, thereby compressing the second spring 40 and moving the pressing member upward. At this time, the elastic force of the first spring 9 is greater than the compressive deformation force of the second spring 40. The first valve seat 8, supported by the first spring 9, causes the valve core 10 to continuously move upward, thereby gradually moving the first rubber pad 11 toward the through-hole 16, thereby reducing the gas intake and stabilizing the intake pressure to 0.03 to 0.2 MPa. The gas discharged from the first-stage pressure regulating mechanism is discharged into the fixed housing 1 through the gas nozzle 25. When the pressure in the fixed housing 1 increases, the gas pressure pushes the second elastic sensor plate 29 to deform and arch upward, thereby driving the adjustment seat 30 upward, while the third spring 33 is in a compressed state. As the adjustment seat 30 moves upward, the adjustment rod 37 and the clamping plate 38 pull the L-shaped flap 34 along the two side pins 35 and upward between the two support arms 26, while the adjustment rod 37 slides within the elongated hole 36. As the L-shaped valve plate 34 flips, the second rubber pad 28 on the second valve seat 27 gradually disengages the gas nozzle 25, thereby reducing the amount of gas entering the fixed housing 1, stabilizing the air pressure in the fixed housing 1, and thus increasing the gas flow rate. It has a compact structure and can be easily installed on a steel cylinder. It has a small size and mass, will not cause the steel cylinder to fall over, and will not be interfered with by the guardrail. It adopts a two-stage pressure reduction method, and the pressure regulating mechanisms are all arranged in the body. The first-stage pressure regulating mechanism can adjust the intake pressure to 0.03~0.2MPa, thereby reducing the inlet and outlet pressure ratio. The second-stage pressure regulating mechanism can expand the ventilation area, thereby increasing the flow rate of bottled liquefied gas, so that it can reach 2.0m3 / h specified in GB35844, to meet the needs of most consumers and expand the scope of application. In addition, the pressure in the pressure regulator is controllable, which ensures the safety of use to a great extent, and can also effectively prevent the user from disassembly and adjustment, further improving the safety of use, and solving the problems existing in the existing technology.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. For those skilled in the art, any replacement improvements or changes made to the implementation methods of the present invention fall within the scope of protection of the present invention.

[0033] Anything not described in detail in the present invention is well known to those skilled in the art.

Claims

1. A two-stage pressure reducing bottled liquefied gas pressure regulator, characterized in that: It includes a fixed shell and a sealing cover arranged at the top opening of the fixed shell, an air outlet pipe connected to the fixed shell is provided on the right side wall of the fixed shell, a positioning pipe is vertically provided in the center of the bottom of the fixed shell, and an air inlet pipe is provided at the bottom of the left side wall of the fixed shell. The positioning pipe is connected to the inner end of the air inlet pipe through a connecting pipe arranged at the bottom of the fixed shell, a first-level pressure regulating mechanism cooperating with the positioning pipe is provided at the bottom of the inner wall of the fixed shell, and a second-level pressure regulating mechanism is provided in the fixed shell above the first-level pressure regulating mechanism.

2. The two-stage pressure reducing bottled liquefied gas pressure regulator according to claim 1, characterized in that: The first-stage pressure regulating mechanism includes a sealing base riveted to the bottom opening of the positioning tube, the sealing base is arranged below the connecting tube, a first valve seat is arranged in the sealing base, the first valve seat is fixed in the sealing base by a first spring, a valve core is vertically arranged on the first valve seat, and a first rubber pad is provided in the first valve seat and is sleeved on the valve core; a support tube is vertically provided at the bottom of the inner wall of the fixed housing, a limiting collar is clamped on the inner wall of the support tube, and support plates are symmetrically provided on the front and rear sides of the inner wall of the limiting collar; a first elastic sensing plate is provided in the support tube, the outer edge of the bottom of the first elastic sensing plate abuts the top of the limiting collar, the middle part of the first elastic sensing plate is recessed downward and abuts the two support plates, a pressing piece is provided in the middle of the first elastic sensing plate, a through hole is provided in the bottom of the fixed housing corresponding to the center position of the support tube, the upper end of the valve core movably passes through the through hole and cooperates with the pressing piece, a limiting cover is riveted in the support tube and abuts the top edge of the first elastic sensing plate, and a second spring sleeved on the pressing piece is provided between the limiting cover and the first elastic sensing plate.

3. The two-stage pressure reducing bottled liquefied gas pressure regulator according to claim 2, characterized in that: The down-pressing member includes a down-pressing plate arranged below the first elastic sensing piece, a down-pressing groove is provided in the center of the bottom of the down-pressing plate, the upper end of the valve core is movably clamped in the down-pressing groove, a stud movably passing through the center of the first elastic sensing piece is provided in the middle of the surface of the down-pressing plate, and a nut is threadedly connected to the stud, and its bottom abuts against the surface of the first elastic sensing piece.

4. The two-stage pressure reducing bottled liquefied gas pressure regulator according to claim 3, characterized in that: A sealing ring is sleeved on the stud between the nut and the first elastic sensing piece.

5. The two-stage pressure reducing bottled liquefied gas pressure regulator according to claim 2, characterized in that: The cam is secured to the left of the valve body and has a locking plate which is secured on the second limit switch and is designed to lock the valve body against the valve body's outer wall and to lock the valve body.

6. The two-stage pressure reducing bottled liquefied gas pressure regulator according to claim 5, characterized in that: The linkage part is an L-shaped flap, and the second valve seat is arranged at the bottom of the vertical section of the L-shaped flap. The front and rear sides of the vertical section of the L-shaped flap above the second valve seat are symmetrically provided with movable working pins connected to the corresponding side arms. A long hole is opened on the horizontal section of the L-shaped valve plate along its length direction, and an adjusting rod passing through the long hole is vertically provided at the bottom of the adjusting seat, and a clamping plate is provided at the bottom end of the adjusting rod.

7. The two-stage pressure reducing bottled liquefied gas pressure regulator according to claim 1, characterized in that: A sealing ring is provided at the bottom of the limiting collar along its circumference direction and abuts against the bottom of the inner wall of the fixed shell.

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