A bottled liquefied petroleum gas pressure regulator

Abstract

The invention discloses a bottled liquefied petroleum gas pressure regulator, comprising a valve body, a valve cover arranged on the valve body, an air inlet arranged on one side of the valve body and an air outlet arranged on the other side of the valve body, characterized in that a breathing hole is arranged on the valve cover, a rubber film and a partition are arranged inside the valve body, and the inside of the pressure regulator is divided into an upper chamber, a middle chamber and a lower chamber by the rubber film and the partition, and the middle chamber is connected with the air outlet through a pressure signal tube, so that the outlet pressure is transmitted to the middle chamber to feed back the outlet pressure; the beneficial effect of the invention is that the space in the pressure regulator chamber is divided into three chambers by arranging a rubber film and a partition in the pressure regulator chamber, a pressure signal tube is arranged on the pressure regulator air outlet to transmit the outlet pressure to the middle chamber, so as to achieve the purpose of feeding back the outlet pressure, and at the same time, the opening of the pressure signal tube deviates from the gas flow direction, which can prevent the dynamic pressure from entering, so as to improve the pressure regulation accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of pressure regulators, and in particular to a bottled liquefied petroleum gas pressure regulator. Background Art

[0002] Traditional energy consumption such as oil and coal has caused serious damage to the environment. With my country's increasing attention to environmental protection and efficient and safe use of energy, clean energy such as liquefied petroleum gas and natural gas are gradually replacing traditional energy, which has promoted the rapid growth of gas consumption. At present, gas supply mainly relies on pipeline transportation and liquefied gas cylinders. Pressure regulators are indispensable as necessary components of liquefied gas cylinders. Their main function is to reduce and stabilize pressure and ensure the safe and efficient use of liquefied gas.

[0003] Although the technology of bottled liquefied petroleum gas pressure regulator is very mature, it still has its shortcomings. The existing bottled liquefied petroleum gas pressure regulator cavity is divided into two upper and lower chambers by a rubber film. The gas flowing out of the pressure regulating nozzle flows through the rubber film, and its dynamic pressure is converted into static pressure acting on the rubber film. As the flow rate of the pressure regulator changes, the force acting on the rubber film also changes, resulting in changes in the outlet pressure of the pressure regulator, and the established pressure regulation accuracy cannot be achieved. Therefore, it is very necessary to improve the bottled liquefied petroleum gas pressure regulator to improve its pressure regulation performance. Summary of the invention

[0004] In view of the shortcomings of existing bottled liquefied petroleum gas pressure regulators, the present invention designs a bottled liquefied petroleum gas pressure regulator, aiming to solve the problems of outlet pressure fluctuation caused by dynamic pressure effect and inability to meet pressure regulation accuracy, so as to improve the pressure regulation performance of the pressure regulator.

[0005] The technical solution of the present invention is as follows:

[0006] A bottled liquefied petroleum gas pressure regulator comprises a valve body, a valve cover arranged on the valve body, an air inlet arranged on one side of the valve body and an air outlet arranged on the other side of the valve body, characterized in that a breathing hole is provided on the valve cover, a rubber film and a partition are provided inside the valve body, and the inside of the pressure regulator is divided into an upper chamber, a middle chamber and a lower chamber by the rubber film and the partition, and the middle chamber is connected to the air outlet through a pressure signal tube, so that the outlet pressure is transmitted to the middle chamber to feedback the outlet pressure.

[0007] The bottled liquefied petroleum gas pressure regulator is characterized in that it also includes a pressure regulating device and a connecting device, the connecting device is fixedly connected to the pressure regulating device, and the pressure regulating device controls the pressure or flow of the air inlet through the connecting device.

[0008] The bottled liquefied petroleum gas pressure regulator is characterized in that the pressure regulating device includes a film pressure plate, a pressure regulating spring, an adjusting screw and a spring pressure cover, the film pressure plate is arranged on the top of the rubber film, the pressure regulating spring is arranged on the film pressure plate, the spring pressure cover is arranged on the top of the pressure regulating spring, and the adjusting screw is arranged on the valve cover and pressed on the spring pressure cover.

[0009] The bottled liquefied petroleum gas pressure regulator is characterized in that the connecting device includes a lever, a pressure regulating rod, a locking nut, a locating pin and a locating seat, a pressure regulating nozzle is arranged at the end of the air inlet duct, the pressure regulating rod is passed through the film pressure plate, the rubber film and the partition, and is fixed to the film pressure plate by a locking nut, the lever is movably arranged on the locating seat by a locating pin, and one end of the lever is connected to the bottom of the pressure regulating rod, and the other end is provided with a valve pad, and the opening of the pressure regulating nozzle is controlled by the valve pad.

[0010] The bottled liquefied petroleum gas pressure regulator is characterized in that a partition sealing ring is provided between the partition and the pressure regulating pull rod, and the partition sealing ring is arranged in the partition sealing ring groove of the partition.

[0011] The bottled liquefied petroleum gas pressure regulator is characterized in that an air intake threaded joint is provided on the outside of the air intake passage, and the air intake threaded joint is provided with a hand wheel.

[0012] The bottled liquefied petroleum gas pressure regulator is characterized in that an inlet joint sealing ring is provided on the outside of the air inlet interface position, and a filter screen is provided on the inside.

[0013] The bottled liquefied petroleum gas pressure regulator is characterized in that the pressure signal tube extends into the gas outlet and the opening direction is away from the gas flow direction.

[0014] The beneficial effects of the present invention are as follows: by arranging a rubber film and a partition in the pressure regulator chamber, the space in the pressure regulator chamber is divided into three chambers, and a pressure signal tube is provided on the pressure regulator outlet to transmit the outlet pressure to the middle chamber, so as to achieve the purpose of feeding back the outlet pressure. At the same time, the opening of the pressure signal tube is away from the gas flow direction, which can prevent the dynamic pressure from entering, so as to improve the pressure regulation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a bottled liquefied petroleum gas pressure regulator;

[0016] In the figure: 1-filter screen; 2-valve body; 31-pressure regulating nozzle; 32-valve pad; 33-film pressure plate; 34-rubber film; 35-pressure regulating spring; 36-adjusting screw; 37-spring pressure cover; 4-upper chamber; 5-breathing hole; 6-valve cover; 7-middle chamber; 8-partition; 9-pressure signal tube; 10-air outlet; 11-lower chamber; 12-partition sealing ring; 131-lever; 132-pressure regulating rod; 133-locking nut; 134-locating pin; 135-locating seat; 14-handwheel; 15-inlet threaded joint; 16-inlet joint sealing ring; 17-inlet duct. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, a bottled liquefied petroleum gas pressure regulator includes a valve body 2, a pressure regulating device, a valve cover 6, a partition 8, a pressure signal tube 9, an air outlet 10, a connecting device, an air inlet 17 and a rubber film 34.

[0019] The valve cover 6 and the air inlet 17 on the valve body 2 are arranged on one side of the valve body 2, and the air outlet 10 is arranged on the other side of the valve body 2. The valve cover 6 is provided with a breathing hole 5. The inside of the valve body 2 is provided with a rubber film 34 and a partition 8, and the inside of the pressure regulator is divided into an upper chamber 4, a middle chamber 7 and a lower chamber 11 by the rubber film 34 and the partition 8. The rubber film 34 is arranged on the valve body 2 and is fixed by the valve cover 6. The partition 8 and the valve body 2 are connected and fixed by welding. The middle chamber 7 is connected to the air outlet through the pressure signal tube 9. The rubber film 34 A pressure balancing device is provided on the upper part, and the pressure or flow of the air inlet is controlled by the pressure balancing device, so as to realize automatic pressure regulation; wherein the upper chamber 4 is connected with the outside atmosphere through the breathing hole 5, the middle chamber 7 is connected with the air outlet 10 through the pressure signal tube 9, and the lower chamber 11 is connected with the air inlet 17 and the air outlet 10; the partition plate 8 separates the middle chamber 7 from the lower chamber 11, so that the gas flowing out of the pressure regulating nozzle cannot directly act on the rubber film 34, avoiding the influence of the outlet pressure fluctuation caused by the conversion of dynamic pressure into static pressure acting on the rubber film.

[0020] In this embodiment, the pressure balancing device includes a pressure regulating device and a connecting device, the connecting device is fixedly connected to the pressure regulating device, and the pressure regulating device controls the pressure of the intake duct through the connecting device. The pressure regulating device includes a film pressure plate 33, a pressure regulating spring 35, an adjusting screw 36 and a spring pressure cap 37, the film pressure plate 33 is arranged on the top of the rubber film 34, the pressure regulating spring 35 is arranged on the film pressure plate 33, the spring pressure cap 37 is arranged on the top of the pressure regulating spring 35, and the adjusting screw 36 is arranged on the valve cover 6 and pressed on the spring pressure cap 37. The connecting device includes a lever 131, a pressure regulating rod 132, a locking nut 133, a positioning pin 134 and a positioning seat 135. A pressure regulating nozzle 31 is provided at the end of the air inlet duct 17 (the pressure regulating nozzle 31 is the opening at the end of the air inlet duct 17). The pressure regulating rod 132 is passed through the film pressure plate 33, the rubber film 34 and the partition 8, and is fixed to the film pressure plate 33 by the locking nut 133. The lever 131 is movably set on the positioning seat 135 by the positioning pin 134, and one end of the lever 131 is connected to the bottom of the pressure regulating rod 132, and the other end is provided with a valve pad 32, and the pressure regulating nozzle 31 is controlled by the valve pad 32.

[0021] In this embodiment, the partition 8 is circular and has a circular hole in the center. The hole diameter is larger than the maximum diameter of the pressure-regulating rod 132 to facilitate assembly. A partition sealing ring 12 is provided between the partition 8 and the pressure-regulating rod 132, and the partition sealing ring 12 is arranged in the partition sealing ring groove of the partition 8 to prevent the gas from leaking from the lower chamber 11 to the middle chamber 7.

[0022] In this embodiment, the pressure signal tube 9 extends into the outlet duct 10, and the opening direction is away from the gas flow direction. A pressure signal tube 9 is provided on the pressure regulator outlet duct 10 to transmit the outlet pressure to the middle chamber 7, so as to achieve the purpose of feeding back the outlet pressure. At the same time, the opening of the pressure signal tube 9 is away from the gas flow direction, which can prevent the dynamic pressure from entering, thereby avoiding the dynamic pressure from entering and affecting the pressure regulation accuracy.

[0023] In this embodiment, an air inlet threaded joint 15 is provided on the outside of the air inlet duct 17, and a hand wheel 14 is provided on the air inlet threaded joint 15; an inlet joint sealing ring 16 is provided on the outside of the interface position of the air inlet duct 17, and a filter screen 18 is provided on the inside.

[0024] The bottled liquefied petroleum gas pressure regulator of the present invention uses the throttling principle to adjust the outlet pressure. The main action process is as follows: when the angle valve of the liquefied petroleum gas cylinder is opened, the gas enters the pressure regulator from the air inlet 17 and flows through the pressure regulating nozzle 31. The valve pad 32 is opened under the action of pressure, and the gas flows into the lower chamber 11 of the pressure regulator and flows out of the pressure regulator from the air outlet 10. A part of the gas flows into the middle chamber 7 below the rubber film 34 of the pressure regulator from the pressure signal tube 9. When the inlet pressure is too large or the flow rate is too small, the outlet pressure will be greater than the set value. The outlet pressure is transmitted to the middle chamber 7 via the pressure signal tube 9, the rubber film 34 bulges upward, and the volume of the upper chamber 4 gradually decreases. When the pressure in the upper chamber 4 is greater than the external atmospheric pressure, the air is discharged from the breathing hole 5. While the rubber film 34 bulges upward, under the joint action of the pressure regulating pull rod 132 and the lever 131, the valve pad 32 moves downward and gradually closes, and the outlet pressure gradually decreases and reaches a balance, so that the gas pressure is maintained within the set pressure regulating range; when the inlet pressure is too large or the flow rate is too small, the outlet pressure will be greater than the set value. The outlet pressure is transmitted to the middle chamber 7 via the pressure signal tube 9, the rubber film 34 bulges upward, and the volume of the upper chamber 4 gradually decreases. When the pressure in the upper chamber 4 is greater than the external atmospheric pressure, the air is discharged from the breathing hole 5. At the same time, the rubber film 34 bulges upward. Under the joint action of the pressure regulating pull rod 132 and the lever 131, the valve pad 32 moves downward and gradually closes. The outlet pressure gradually decreases and reaches a balance, so that the gas pressure is maintained within the set pressure regulating range; when the When the outlet pressure is too low or the flow rate is too large, the outlet pressure will be lower than the set value. The outlet pressure is transmitted to the middle chamber 7 via the pressure signal tube 9, the rubber film 34 is sunken downward, and the volume of the upper chamber 4 gradually increases. When the pressure in the upper chamber 4 is lower than the external atmospheric pressure, air enters the upper chamber 4 through the breathing hole 5. While the rubber film 34 is sunken downward, under the joint action of the pressure regulating rod 132 and the lever 131, the valve pad 32 moves upward and gradually opens, and the outlet pressure gradually increases to reach a new balance, so that the gas pressure is maintained within the set pressure regulating range.

Claims

1. A bottled liquefied petroleum gas pressure regulator, comprising a valve body (2), a valve cover (6) arranged on the valve body (2), an air inlet (17) arranged on one side of the valve body (2), and an air outlet (10) arranged on the other side of the valve body (2), characterized in that: The valve cover (6) is provided with a breathing hole (5), the valve body (2) is provided with a rubber film (34) and a partition (8), and the inside of the pressure regulator is divided into an upper chamber (4), a middle chamber (7) and a lower chamber (11) by the rubber film (34) and the partition (8), and the middle chamber (7) is connected to the outlet duct (10) through a pressure signal pipe (9), so that the outlet pressure is transmitted to the middle chamber (7) to feedback the outlet pressure; It also includes a pressure regulating device and a connecting device, wherein the connecting device is fixedly connected to the pressure regulating device, and the pressure regulating device controls the pressure or flow of the air inlet through the connecting device; The connecting device comprises a lever (131), a pressure regulating rod (132), a locking nut (133), a positioning pin (134) and a positioning seat (135); a pressure regulating nozzle (31) is arranged at the end of the air inlet duct (17); the pressure regulating rod (132) is passed through the film pressure plate (33), the rubber film (34) and the partition (8), and is fixed to the film pressure plate (33) through the locking nut (133); the lever (131) is movably arranged on the positioning seat (135) through the positioning pin (134); one end of the lever (131) is connected to the bottom of the pressure regulating rod (132), and the other end is provided with a valve pad (32); and the opening of the pressure regulating nozzle (31) is controlled by the valve pad (32); An air intake threaded joint (15) is provided on the outside of the air intake passage (17), and the air intake threaded joint (15) is provided with a hand wheel (14).

2. A bottled liquefied petroleum gas pressure regulator according to claim 1, characterized in that: The pressure regulating device comprises a film pressure plate (33), a pressure regulating spring (35), an adjusting screw (36) and a spring pressure cover (37); the film pressure plate (33) is arranged on the top of the rubber film (34); the pressure regulating spring (35) is arranged on the film pressure plate (33); the spring pressure cover (37) is arranged on the top of the pressure regulating spring (35); and the adjusting screw (36) is arranged on the valve cover (6) and pressed on the spring pressure cover (37).

3. A bottled liquefied petroleum gas pressure regulator according to claim 1, characterized in that: A partition sealing ring (12) is provided between the partition (8) and the pressure regulating pull rod (132), and the partition sealing ring (12) is arranged in a partition sealing ring groove of the partition (8).

4. A bottled liquefied petroleum gas pressure regulator according to claim 1, characterized in that: An inlet joint sealing ring (16) is provided on the outside of the interface position of the air inlet duct (17), and a filter screen (18) is provided on the inside.

5. The bottled liquefied petroleum gas pressure regulator according to claim 1, characterized in that: The pressure signal tube (9) extends into the interior of the gas outlet (10), and the opening direction is away from the gas flow direction.

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