Pressure reducing valve on liquefied petroleum gas steel cylinder

Abstract

The utility model belongs to the technical field of pressure reducing valves, and discloses a pressure reducing valve on a liquefied petroleum gas steel cylinder, which comprises a pressure reducing valve body, one end of the pressure reducing valve body is fixedly connected with a rubber ring, and the outer surface of one end of the pressure reducing valve body is movably connected with a fixed connecting screw at the inner side of the rubber ring. One end of the fixed connecting screw opening is fixedly connected with a rotating block, the other end of the pressure reducing valve body is fixedly connected with a pagoda air pipe connector, four sliding blocks are movably connected into the other end of the pressure reducing valve body, one ends of the four sliding blocks are fixedly connected with fixing rods, and one ends of the four fixing rods are fixedly connected with extrusion plates. Positioning blocks are fixedly connected to the side faces of the four extrusion plates, and iron wires are connected between the interiors of the four positioning blocks in a sleeving mode, so that the locking function of the connecting pipe and the pagoda gas pipe connector can be achieved, the connection firmness is ensured, the good sealing performance can be formed, and liquefied petroleum gas leakage is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure reducing valves, in particular to a pressure reducing valve on a liquefied petroleum gas cylinder. Background Art

[0002] Liquefied petroleum gas (LPG) is a commonly used clean energy source, widely used in households, industry, and transportation. However, LPG exists in two forms, liquid and gas, at room temperature, and the gas expands during storage, so safety issues are particularly important. To ensure the safe transportation and use of LPG, pressure reducing valves are designed to control gas pressure and prevent explosions or leaks caused by excessive pressure.

[0003] However, after the pressure reducing valve on the existing liquefied petroleum gas cylinder has been used for a long time, the connecting pipe will naturally shrink and the pagoda air pipe interface will become loose, resulting in leakage of liquefied petroleum gas. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that after long-term use, the pressure reducing valve on the liquefied petroleum gas cylinder will naturally shrink the connecting pipe and loosen the pagoda gas pipe interface, resulting in liquefied petroleum gas leakage. The utility model proposes the following technical solutions:

[0005] A pressure reducing valve on a liquefied petroleum gas cylinder comprises a pressure reducing valve body, one end of the pressure reducing valve body is fixedly connected to a rubber ring, an outer surface of one end of the pressure reducing valve body is movably connected to a fixed connecting screw at a position inside the rubber ring, one end of the fixed connecting screw is fixedly connected to a rotating block, the other end of the pressure reducing valve body is fixedly connected to a pagoda air pipe interface, four sliders are movably connected inside the other end of the pressure reducing valve body, one end of each of the four sliders is fixedly connected to a fixing rod, one end of each of the four fixing rods is fixedly connected to an extrusion plate, the sides of the four extrusion plates are fixedly connected to positioning blocks, iron wires are sleeved between the insides of the four positioning blocks, and a sealing gasket is bonded to the outer surface of the pagoda air pipe interface at a position below the extrusion plate.

[0006] Preferably, a rubber inner gasket is bonded to the inside of the rotating block at a position outside the fixed connection thread, a spring is fixedly connected to the top of the rotating block, one end of the spring is fixedly connected to the extrusion block, and the extrusion block is movably connected to the inside of the rotating block.

[0007] Preferably, the width of the slider is greater than the width of the fixing rod, and the fixing rod is movably connected to the inside of one end of the pressure reducing valve body.

[0008] Preferably, the centers of the extruded plate and the iron wire are on the same horizontal line.

[0009] Preferably, the centers of the sealing gasket and the pagoda trachea interface are on the same horizontal line, and the sealing gasket is made of rubber.

[0010] Preferably, the shape of the extrusion block is trapezoidal, and the circumference of one end surface of the extrusion block close to the spring is greater than the circumference of the other end surface.

[0011] The beneficial effects of the utility model are:

[0012] (1) It can realize the locking function of the connecting pipe and the pagoda gas pipe interface, ensure the firmness of the connection, form a good sealing performance, and prevent liquefied petroleum gas leakage.

[0013] (2) It can enhance the stability of the connection between the pressure reducing valve body and the cylinder connection end, prevent the thread structure from loosening, ensure the airtightness of the connection between the pressure reducing valve and the liquefied petroleum gas cylinder, and effectively prevent gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a schematic diagram of the structure of a pressure reducing valve on a liquefied petroleum gas cylinder;

[0015] Figure 2 Shown is a schematic diagram of the installation structure of the pagoda air pipe interface;

[0016] Figure 3 Shown is a schematic diagram of the installation structure of the extruded plate;

[0017] Figure 4 Shown is a schematic diagram of the installation structure of the extrusion block;

[0018] In the figure: 1. Pressure reducing valve body; 2. Rubber ring; 3. Fixed connection screw; 4. Rotating block; 5. Pagoda air pipe interface; 6. Slider; 7. Fixed rod; 8. Extrusion plate; 9. Positioning block; 10. Iron wire; 11. Sealing gasket; 12. Rubber inner washer; 13. Spring; 14. Extrusion block. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] Example 1

[0021] The utility model provides a pressure reducing valve for a liquefied petroleum gas cylinder. Figures 1 to 4As shown, it includes a pressure reducing valve body 1, one end of the pressure reducing valve body 1 is fixedly connected to a rubber ring 2, the outer surface of one end of the pressure reducing valve body 1 is located at the inner position of the rubber ring 2 and is movably connected to a fixed connecting screw 3, one end of the fixed connecting screw 3 is fixedly connected to a rotating block 4, the other end of the pressure reducing valve body 1 is fixedly connected to a pagoda trachea interface 5, the other end of the pressure reducing valve body 1 is movably connected to four sliders 6, one end of the four sliders 6 is fixedly connected to a fixing rod 7, one end of the four fixing rods 7 is fixedly connected to an extrusion plate 8, the sides of the four extrusion plates 8 are fixedly connected to positioning blocks 9, the insides of the four positioning blocks 9 are sleeved with iron wires 10, and the outer surface of the pagoda trachea interface 5 is located below the extrusion plate 8 and is bonded with a sealing gasket 11.

[0022] like Figure 1 and Figure 3 As shown, a rubber inner gasket 12 is bonded to the outside of the fixed connection screw thread 3 inside the rotating block 4, a spring 13 is fixedly connected to the top of the rotating block 4, one end of the spring 13 is fixedly connected to the extrusion block 14, an extrusion groove is provided inside the rotating block 4, and the extrusion block 14 is movably connected to the inside of the rotating block 4. When a force is applied to the extrusion block 14, the extrusion block 14 compresses the spring 13 and moves upward along the extrusion groove.

[0023] like Figure 1 and Figure 3 As shown, the width of the slider 6 is greater than the width of the fixed rod 7. The fixed rod 7 is movably connected to the inside of one end of the pressure reducing valve body 1, ensuring that the slider 6 can drive the fixed rod 7 to slide up and down inside one end of the pressure reducing valve body 1. The slider 6 plays a positioning role for the fixed rod 7.

[0024] like Figure 1 and Figure 3 As shown, the centers of the extrusion plate 8 and the iron wire 10 are on the same horizontal line, ensuring that when the iron wire 10 is tightened, the iron wire 10 squeezes the extrusion plate 8, and the extrusion plate 8 squeezes the connecting pipe and the sealing gasket 11 to form a seal.

[0025] like Figure 1 and Figure 3 As shown, the centers of the sealing gasket 11 and the pagoda air pipe interface 5 are on the same horizontal line. The sealing gasket 11 is made of rubber, which can form a seal between the inner surface of the connecting pipe and the outer surface of the sealing gasket 11 to prevent leakage of liquefied petroleum gas and enhance the sealing performance of the pagoda air pipe interface 5.

[0026] like Figure 1 and Figure 4 As shown, the shape of the extrusion block 14 is trapezoidal, and the circumference of one end face of the extrusion block 14 close to the spring 13 is greater than the circumference of the other end face, ensuring that when the cylinder connecting end is connected to the pressure reducing valve body 1, the cylinder connecting end squeezes the extrusion block 14 to move toward the inside of the rotating block 4, ensuring that the pressure reducing valve body 1 can be normally connected to the cylinder.

[0027] Working principle: During the actual use of the device, first align the connection end of the liquefied petroleum gas cylinder with the fixed connection screw 3, then rotate the rotating block 4, which drives the fixed connection screw 3 to rotate synchronously. Since the fixed connection screw 3 is threadedly connected to the inner surface of the connection end of the liquefied petroleum gas cylinder, the fixed connection screw 3 will slowly enter the interior of the cylinder connection end as it rotates. When the cylinder connection end contacts the extrusion block 14, a force is applied to the extrusion block 14, which compresses the spring 13 and moves upward. Continue to rotate the fixed connection screw 3. When the cylinder connection end squeezes the rubber inner gasket 12, Stop rotating and fix the connecting screw 3. At this time, the rubber ring 2 is squeezed and fitted with the inside of the cylinder connection end to form a first seal, and the cylinder connection end squeezes the rubber inner gasket 12 to form a second seal. The two seals can effectively prevent liquefied petroleum gas leakage. Due to the reaction force of the spring 13, the spring 13 will apply force to the squeezing block 14, and the squeezing block 14 will apply force to the cylinder connection end to form a squeeze fixation, which can enhance the stability of the connection between the pressure reducing valve body 1 and the cylinder connection end, prevent the thread structure from loosening, ensure the airtightness of the connection between the pressure reducing valve and the liquefied petroleum gas cylinder, and effectively prevent gas leakage;

[0028] Then when liquefied petroleum gas needs to be used, the connecting pipe needs to be sleeved on the outer surface of the pagoda air pipe interface 5. When the connecting pipe passes the position of the sealing gasket 11, the preliminary positioning is completed, and then the wire 10 is tightened. Since the wire 10 and the extrusion plate 8 are concentric, the wire 10 contracts and drives the extrusion plate 8 to move inward. The movement of the extrusion plate 8 drives the fixed rod 7 to move synchronously. The movement of the fixed rod 7 drives the slider 6 to move synchronously. As the extrusion plate 8 moves slowly, the inner surface of the extrusion plate 8 will contact the outer surface of the connecting pipe. When the inner surface of the connecting pipe is squeezed and fitted with the outer surface of the sealing gasket 11, at this time, stop tightening the wire 10. The connecting pipe will form a seal with the outer surface of the sealing gasket 11, which can realize the locking function of the connecting pipe and the pagoda air pipe interface 5, ensure the firmness of the connection, form good sealing performance, and prevent liquefied petroleum gas leakage.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A pressure reducing valve on a liquefied petroleum gas cylinder, characterized in that: The invention comprises a pressure reducing valve body (1), wherein one end of the pressure reducing valve body (1) is fixedly connected to a rubber ring (2), an outer surface of one end of the pressure reducing valve body (1) is movably connected to a fixed connection screw (3) at a position inside the rubber ring (2), one end of the fixed connection screw (3) is fixedly connected to a rotating block (4), the other end of the pressure reducing valve body (1) is fixedly connected to a pagoda air pipe interface (5), the other end of the pressure reducing valve body (1) is movably connected to four sliders (6), one end of each of the four sliders (6) is fixedly connected to a fixed rod (7), one end of each of the four fixed rods (7) is fixedly connected to an extrusion plate (8), the sides of the four extrusion plates (8) are fixedly connected to positioning blocks (9), iron wires (10) are sleeved between the insides of the four positioning blocks (9), and a sealing gasket (11) is bonded to the outer surface of the pagoda air pipe interface (5) at a position below the extrusion plate (8).

2. The pressure reducing valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that: A rubber inner washer (12) is bonded to the interior of the rotating block (4) at a position outside the fixed connection screw thread (3); a spring (13) is fixedly connected to the interior of the top end of the rotating block (4); one end of the spring (13) is fixedly connected to an extrusion block (14); and the extrusion block (14) is movably connected to the interior of the rotating block (4).

3. The pressure reducing valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that: The width of the slider (6) is greater than the width of the fixing rod (7), and the fixing rod (7) is movably connected to the interior of one end of the pressure reducing valve body (1).

4. The pressure reducing valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that: The centers of the extrusion plate (8) and the iron wire (10) are on the same horizontal line.

5. The pressure reducing valve for a liquefied petroleum gas cylinder according to claim 1, characterized in that: The centers of the sealing gasket (11) and the pagoda trachea interface (5) are on the same horizontal line, and the sealing gasket (11) is made of rubber.

6. The pressure reducing valve for a liquefied petroleum gas cylinder according to claim 2, characterized in that: The shape of the extrusion block (14) is trapezoidal, and the circumference of one end surface of the extrusion block (14) close to the spring (13) is greater than the circumference of the other end surface.

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