A rear right angle inclined push piston type liquefied petroleum gas overflow cut-off protection bottle valve

Abstract

The utility model discloses a rear -mounting right angle oblique push piston type liquefied petroleum gas overflow cut -out protection bottle valve, and overflow cut -out subassembly includes guide base, the top head of being located on the upper end of guide base, the first sealing ring of being located between guide base and top head and the second sealing ring of being located at the lower extreme of guide base, and guide base is slid in the medium channel, and inside is equipped with the flow channel, and the lateral wall is equipped with the radial through -hole of intercommunication medium channel and flow channel, and the first sealing ring is used for with first plugging convexity cooperation to seal medium channel, and the second sealing ring is located at the downside of radial through -hole, between guide base and medium channel. Overflow cut -out subassembly adopts piston type structure, and its guide base and medium channel precision gap cooperation, ensure sliding guiding property, when overflowing, gas drive overflow cut -out subassembly vertical motion, realize sealed cut -out through the cooperation of first sealing ring and first plugging convexity. Reset subassembly is placed in the downstream of overflow cut -out subassembly, and when reset subassembly is unusual, overflow cut -out subassembly automatically cuts off the airflow.

Description

Technical Field

[0001] This utility model relates to the field of bottle valve technology, and in particular to a rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection bottle valve. Background Technology

[0002] Cylinder valves are crucial passive safety devices in the storage, transportation, and use of flammable and explosive gases such as liquefied petroleum gas. They effectively prevent fires and explosions caused by accidental large-volume leaks, ensuring the safety of life and property. Their core function is overcurrent shut-off; when the gas flow through the valve exceeds a preset rated value (threshold), the valve automatically and quickly cuts off the gas flow path completely. After overcurrent shut-off, the valve is in the closed state. Manual pressing of the reset component on the valve is required.

[0003] Traditional bottle valve reset components typically employ a front-mounted structure (as described in the applicant's previous patent application CN202311462030.X), where the reset component is placed in front of the overcurrent cut-off component from the direction of the bottle valve's inlet to outlet. This design presents a fundamental safety hazard: when the reset component leaks due to impact deformation, seal aging, or external damage, it will be unable to cut off the leakage, directly threatening safe use. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the prior art by providing a rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A rear-mounted right-angle inclined piston type liquefied petroleum gas overflow cut-off protection cylinder valve includes a main valve body and an overflow cut-off assembly, a reset assembly, and an opening and closing assembly disposed on the main valve body. The main valve body has a medium channel and a first sealing protrusion formed inside. The overflow cut-off assembly includes a guide base, a top head disposed on the upper end of the guide base, a first sealing ring disposed between the guide base and the top head, and a second sealing ring disposed on the lower end of the guide base. The guide base is slidably disposed in the medium channel and has a flow channel disposed axially inside. The side wall of the guide base has a radial through hole connecting the medium channel and the flow channel. The first sealing ring is used to cooperate with the first sealing protrusion to seal the medium channel. The second sealing ring is located below the radial through hole and between the guide base and the medium channel.

[0007] A further technical solution is that, along the gas flow direction, the reset component is located downstream of the overcurrent cut-off component.

[0008] A further technical solution is that the reset assembly includes a reset valve body connected to the main valve body, a reset valve stem passing through the reset valve body, a reset pressure ring disposed in the reset valve body for limiting the reset valve stem, a reset spring sleeved on the reset valve stem, and a reset sealing ring disposed between the reset valve body and the reset valve stem. The end of the reset valve stem away from the main valve body is provided with a reset pressure cap, and the two ends of the reset spring abut against the reset pressure ring and the reset pressure cap, respectively.

[0009] A further technical solution is that the upper end of the top is spherical, and the end of the reset valve stem near the top is inclined, with the angle between the inclined surface and the axial direction being 20° to 45°.

[0010] A further technical solution is that the angle between the inclined plane and the axial direction is 25°.

[0011] A further technical solution is that the guide base includes an upper guide base and a lower guide base, which are spaced apart vertically. The upper guide base is in the shape of a circular plate, and the lower guide base is in the shape of a ring. The flow channel is formed inside the lower guide base. The upper guide base and the lower guide base are connected by multiple connecting rods. The upper end of the inner wall of the connecting rod is connected to the outer wall of the upper guide base, and the lower end of the inner wall of the connecting rod is connected to the outer wall of the lower guide base. A radial through hole is formed between two adjacent connecting rods.

[0012] A further technical solution is that the upper part of the guide base is provided with a connecting hole, and the bottom of the top head is provided with a connecting part corresponding to the connecting hole. After the connecting part passes through the connecting hole, it is riveted and fitted with the upper flange of the guide base.

[0013] A further technical solution is that the upper part of the guide base is provided with an upwardly extending first clamping protrusion, and the top head is provided with a second clamping protrusion. The first clamping protrusion, the upper part of the guide base, the top head and the second clamping protrusion form a first sealing ring mounting groove. The first sealing ring is installed in the first sealing ring mounting groove. The lower part of the guide base is formed with a second sealing ring mounting groove, and the second sealing ring is installed in the second sealing ring mounting groove.

[0014] A further technical solution includes an air inlet pipe, which is located at the air inlet end of the main valve body and the air outlet end of the air inlet pipe is connected to the medium channel. The air inlet end of the air inlet pipe is connected to the air outlet end of the liquefied gas tank.

[0015] A further technical solution is that the surface of the first sealing ring that contacts the first sealing protrusion is a conical surface, and the radius of this conical surface increases from top to bottom, and the second sealing ring is a Y-shaped ring.

[0016] The beneficial effects of adopting the above technical solution are as follows:

[0017] From the air inlet to the air outlet of the bottle valve, the reset component is placed downstream of the overcurrent cut-off component. When the reset component malfunctions or leaks, the overcurrent cut-off component upstream of the medium channel will cut off the airflow until the fault is eliminated, thus ensuring safety and effectively improving the safety of the product.

[0018] The overcurrent cut-off assembly adopts a piston-type structure. Its guide base is precisely fitted with the medium channel to ensure sliding guidance. It is equipped with an axial flow channel and a radial through hole inside. After the gas enters from the flow channel, it is output through the radial through hole. During overcurrent, the gas drives the overcurrent cut-off assembly to move vertically. The sealing and cutting-off are achieved by the first sealing ring cooperating with the first sealing protrusion.

[0019] The top end of the valve stem features a spherical design, while the end of the reset valve stem near the top end is inclined. Through the coordinated movement of the inclined surface and the spherical surface, the horizontal displacement generated by pressing the reset valve stem is converted into a vertical displacement that drives the overcurrent cut-off assembly. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention;

[0021] Figure 2 This is a perspective view of the overcurrent cut-off component of this utility model;

[0022] Figure 3 This is a cross-sectional view of the overcurrent cut-off assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the bottle valve in normal operating condition;

[0024] Figure 5 This is a schematic diagram of the bottle valve cutting off the medium passage during overcurrent.

[0025] Figure 6 This is a schematic diagram of the bottle valve in its reset state;

[0026] Figure 7 This is a diagram showing the bottle valve returning to the closed state.

[0027] In the diagram: 1. Main valve body; 1-1. First sealing protrusion; 1-2. Medium channel; 1-2-1. Air inlet; 1-2-2. Air outlet; 1-3. Second sealing protrusion; 2. Overcurrent cut-off assembly; 2-1. Guide base; 2-1-1. Flow channel; 2-1-2. Radial through hole; 2-1-3. Upper part of guide base; 2-1-3-1. Connecting hole; 2-1-3-2. First clamping protrusion; 2-1-4. Lower part of guide base; 2-1-5. Connecting rod 2-2, Top head; 2-2-1, Connecting part; 2-2-2, Second clamping protrusion; 2-3, First sealing ring; 2-4, Second sealing ring; 3, Reset assembly; 3-1, Reset valve stem; 3-2, Reset valve body; 3-3, Reset pressure ring; 3-4, Reset spring; 3-5, Reset sealing ring; 3-6, Reset pressure cover; 4, Opening and closing assembly; 4-1, Opening and closing switch; 4-2, Opening and closing plate; 4-3, Opening and closing block; 4-4, Opening and closing sealing block; 5, Air inlet pipe. Detailed Implementation

[0028] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] like Figure 1-3 As shown, a rear-mounted right-angle oblique piston type liquefied petroleum gas overcurrent cut-off protection cylinder valve is disclosed, including a main valve body 1 and an overcurrent cut-off assembly 2, a reset assembly 3 and an opening and closing assembly 4 disposed on the main valve body 1.

[0031] Preferably, the liquefied petroleum gas overcurrent cut-off protection cylinder valve further includes an inlet pipe 5, which is located at the inlet end of the main valve body 1, and the outlet end of the inlet pipe 5 is connected to the medium channel 1-2. The inlet end of the inlet pipe 5 is connected to the outlet pipe of the liquefied gas tank. If the inlet pipe 5 is not selected, the inlet end of the main valve body 1 is directly connected to the outlet pipe of the liquefied gas tank.

[0032] The main valve body 1 is cast and has a media channel 1-2, a first sealing protrusion 1-1, and a second sealing protrusion 1-3 formed inside. The first sealing protrusion 1-1 and the second sealing protrusion 1-3 are provided with through holes for liquefied gas to pass through, and are integrally formed with the main valve body 1.

[0033] Reference Figure 2 and Figure 3 The overcurrent cut-off assembly 2 is a piston-type overcurrent cut-off assembly, including a guide base 2-1, a top head 2-2 disposed on the upper end of the guide base 2-1, a first sealing ring 2-3 disposed between the guide base 2-1 and the top head 2-2, and a second sealing ring 2-4 disposed on the lower end of the outer side wall of the guide base 2-1. The guide base 2-1 is slidably disposed in the medium channel 1-2. The guide base 2-1 has an axially arranged flow channel 2-1-1 inside. The side wall of the guide base 2-1 has a radial through hole 2-1-2 connecting the medium channel 1-2 and the flow channel 2-1-1. The first sealing ring 2-3 is used to cooperate with the first sealing protrusion 1-1 to seal the medium channel 1-2. The second sealing ring 2-4 is located below the radial through hole 2-1-2 and between the guide base 2-1 and the medium channel 1-2, and is used for dynamic sealing between the guide base 2-1 and the medium channel 1-2.

[0034] Gas enters through inlet 1-2-1 and exits through outlet 1-2-2. Along the gas flow direction, the reset assembly 3 is located downstream of the overcurrent cutoff assembly 2. This is a rear-mounted structural design; if the reset assembly 3 malfunctions or leaks, the overcurrent cutoff assembly 2 at the front end of the medium channel 1-2 will cut off the airflow until the fault is cleared, thus ensuring safety and effectively improving product safety.

[0035] The reset assembly 3 includes a reset valve body 3-2 connected to the main valve body 1, a reset valve stem 3-1 passing through the reset valve body 3-2, a reset pressure ring 3-3 disposed in the reset valve body 3-2 for limiting the reset valve stem 3-1, a reset spring 3-4 sleeved on the reset valve stem 3-1, and a reset sealing ring 3-5 disposed between the reset valve body 3-2 and the reset valve stem 3-1. The end of the reset valve stem 3-1 away from the main valve body 1 is provided with a reset pressure cap 3-6. The reset pressure ring 3-3 is disposed inside the reset valve body 3-2 and is sleeved on the reset valve stem 3-1. The reset valve body 3-2 is formed with a limiting part for limiting the reset pressure ring 3-3. The limiting part limits the reset pressure ring 3-3. The two ends of the reset spring 3-4 abut against the reset pressure ring 3-3 and the reset pressure cap 3-6, respectively.

[0036] The reset valve body 3-2 is located at the side end of the main valve body 1, and is integrally formed with the main valve body 1. In this embodiment, the reset valve body 3-2 is perpendicular to the main valve body 1.

[0037] The upper end of the top head 2-2 adopts a spherical design, and the end of the reset valve stem 3-1 near the top head 2-2 is an inclined surface, with the angle between the inclined surface and the axial direction being 20° to 45°. Through the coordinated movement of the inclined surface and the spherical surface, the horizontal displacement generated by pressing the reset valve stem 3-1 is converted into the vertical displacement that drives the overcurrent cut-off assembly 2.

[0038] In this embodiment, the angle between the inclined plane and the axial direction is 25°. Without considering external factors such as friction, a 45° angle results in the same horizontal thrust and vertical force. To reduce manual pressing force, while ensuring that the lateral displacement of the reset valve stem 3-1 meets product design requirements, the inclined angle is gradually reduced to 25°.

[0039] In use, pressing the reset cap 3-6 causes the reset valve rod 3-1 to push the top head 2-2 so that the first sealing ring 2-3 is disengaged from the first sealing protrusion 1-1, thereby enabling the overcurrent cut-off protection bottle valve to be used normally. After the reset valve rod 3-1 pushes the first sealing ring 2-3 away from the first sealing protrusion 1-1, it is reset under the elastic force of the reset spring 3-4.

[0040] Specifically, the guide base 2-1 includes an upper guide base 2-1-3 and a lower guide base 2-1-4 spaced apart vertically. The upper guide base 2-1-3 is in the shape of a circular plate, and the lower guide base 2-1-4 is in the shape of a ring. The flow channel 2-1-1 is formed inside the lower guide base 2-1-4. The upper guide base 2-1-3 and the lower guide base 2-1-4 are connected by multiple connecting rods 2-1-5. The upper end of the inner wall of the connecting rod 2-1-5 is connected to the outer wall of the upper guide base 2-1-3, and the lower end of the inner wall of the connecting rod 2-1-5 is connected to the outer wall of the lower guide base 2-1-4. A radial through hole 2-1-2 is formed between two adjacent connecting rods 2-1-5.

[0041] The upper part 2-1-3 of the guide base has a connecting hole 2-1-3-1, and the bottom of the top head 2-2 has a connecting part 2-2-1 corresponding to the connecting hole 2-1-3-1. The connecting part 2-2-1 passes through the connecting hole 2-1-3-1 and is riveted to the flange of the upper part 2-1-3 of the guide base. The upper part 2-1-3 of the guide base has a first clamping protrusion 2-1-3-2 extending upward, and the top head 2-2 has a second clamping protrusion 2-2-2. The first clamping protrusion 2-1-3-2, the upper part 2-1-3 of the guide base, the top head 2-2 and the second clamping protrusion 2-2-2 form a first sealing ring mounting groove. The first sealing ring 2-3 is installed in the first sealing ring mounting groove. The lower part 2-1-4 of the guide base has a second sealing ring mounting groove, and the second sealing ring 2-4 is installed in the second sealing ring mounting groove.

[0042] During assembly, first place the first sealing ring 2-3 on the upper part 2-1-3 of the guide base, then pass the connecting part 2-2-1 through the connecting hole 2-1-3-1 and rivet it with the upper part 2-1-3 of the guide base, which is firm and beautiful.

[0043] The surface of the first sealing ring 2-3 that contacts the first sealing protrusion 1-1 is a conical surface, and the radius of the conical surface increases from top to bottom. The second sealing ring 2-4 is a Y-shaped ring.

[0044] The opening and closing assembly 4 includes an opening and closing switch 4-1, an opening and closing plate 4-2, an opening and closing block 4-3, and an opening and closing sealing block 4-4. The opening and closing switch 4-1 is rotatably connected to the main valve body 1. The opening and closing switch 4-1 includes an opening and closing valve stem and an opening and closing valve cover disposed on the opening and closing valve stem. The opening and closing valve stem is rotatably connected to the main valve body 1. A first slot is opened on the opening and closing valve stem. The opening and closing block 4-3 is threadedly connected to the inside of the main valve body 1. The opening and closing block 4-3 is located between the second sealing protrusion 1-3 and the opening and closing switch 4-1. A second slot is opened on the opening and closing block 4-3. The opening and closing plate 4-2 is located between the opening and closing valve stem and the opening and closing block 4-3. The two ends of the opening and closing plate 4-2 are respectively located in the first slot and the second slot. At the same time, the bottom of the opening and closing plate 4-2 is supported on the opening and closing block 4-3. The opening and closing sealing block 4-4 is located between the second sealing protrusion 1-3 and the opening and closing block 4-3. The opening and closing sealing block 4-4 can abut against the second sealing protrusion 1-3 to close the medium channel 1-2.

[0045] Reference Figure 4 During the use of the overcurrent cut-off protection cylinder valve, the medium channel 1-2 inside the main valve body 1 is opened by turning the on / off switch 41 of the opening / closing assembly 4. The liquefied gas in the liquefied gas tank enters the medium channel 1-2 through the inlet 1-2-1, and then exits through the outlet 1-2-2 via the first sealing protrusion 1-1 and the second sealing protrusion 1-3. (Refer to...) Figure 5 When an overcurrent fault occurs, the overcurrent cut-off assembly inside the main valve body 1 moves vertically, achieving a sealing cut-off through the engagement of the first sealing ring and the first sealing protrusion, thereby preventing further leakage of liquefied gas. (Refer to...) Figure 6 and Figure 7 Turning the on / off switch 41 of the on / off assembly 4 closes the medium passage 1-2. After troubleshooting, pressing the reset cap 3-6 of the reset assembly 3 pushes the reset valve stem 3-1 to push the top head 2-2, thereby disengaging the first sealing ring 2-3 from the first sealing protrusion 1-1, thus restoring the overcurrent cut-off protection bottle valve to the closed state.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rear-mounted right-angle oblique piston type liquefied petroleum gas overcurrent cut-off protection cylinder valve, comprising a main valve body (1) and an overcurrent cut-off assembly (2), a reset assembly (3), and an opening and closing assembly (4) disposed on the main valve body (1), wherein the main valve body (1) has a medium channel (1-2) and a first sealing protrusion (1-1) formed inside, characterized in that: The overcurrent cut-off assembly (2) includes a guide base (2-1) slidably disposed in the medium channel (1-2), a top head (2-2) disposed at the upper end of the guide base (2-1), a first sealing ring (2-3) disposed between the guide base (2-1) and the top head (2-2), and a second sealing ring (2-4) disposed at the lower end of the guide base (2-1). The guide base (2-1) is slidably disposed in the medium channel (1-2) and has a flow channel (2-1-1) arranged axially inside. The side wall of the guide base (2-1) is provided with a radial through hole (2-1-2) connecting the medium channel (1-2) and the flow channel (2-1-1). The first sealing ring (2-3) is used to cooperate with the first sealing protrusion (1-1) to seal the medium channel (1-2). The second sealing ring (2-4) is located below the radial through hole (2-1-2) and between the guide base (2-1) and the medium channel (1-2).

2. The rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 1, characterized in that: Along the gas flow direction, the reset component (3) is located downstream of the overcurrent cut-off component (2).

3. The rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 1, characterized in that: The reset assembly (3) includes a reset valve body (3-2) connected to the main valve body (1), a reset valve stem (3-1) passing through the reset valve body (3-2), a reset pressure ring (3-3) set in the reset valve body (3-2) for limiting the reset valve stem (3-1), a reset spring (3-4) sleeved on the reset valve stem (3-1), and a reset sealing ring (3-5) set between the reset valve body (3-2) and the reset valve stem (3-1). The end of the reset valve stem (3-1) away from the main valve body (1) is provided with a reset pressure cap (3-6), and the two ends of the reset spring (3-4) abut against the reset pressure ring (3-3) and the reset pressure cap (3-6) respectively.

4. The rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 3, characterized in that: The upper end of the top head (2-2) is spherical, and the end of the reset valve stem (3-1) near the top head (2-2) is inclined, with the angle between the inclined surface and the axial direction being 20° to 45°.

5. A rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 4, characterized in that: The angle between the inclined plane and the axial direction is 25°.

6. The rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 1, characterized in that: The guide base (2-1) includes an upper guide base (2-1-3) and a lower guide base (2-1-4) spaced apart vertically. The upper guide base (2-1-3) is in the shape of a circular plate, and the lower guide base (2-1-4) is in the shape of a ring. The flow channel (2-1-1) is formed inside the lower guide base (2-1-4). The upper guide base (2-1-3) and the lower guide base (2-1-4) are connected by multiple connecting rods (2-1-5). The upper end of the inner wall of the connecting rod (2-1-5) is connected to the outer wall of the upper guide base (2-1-3), and the lower end of the inner wall of the connecting rod (2-1-5) is connected to the outer wall of the lower guide base (2-1-4). A radial through hole (2-1-2) is formed between two adjacent connecting rods (2-1-5).

7. A rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 6, characterized in that: The upper part (2-1-3) of the guide base is provided with a connecting hole (2-1-3-1), and the bottom of the top head (2-2) is provided with a connecting part (2-2-1) corresponding to the connecting hole (2-1-3-1). The connecting part (2-2-1) passes through the connecting hole (2-1-3-1) and is riveted to the flange of the upper part (2-1-3) of the guide base.

8. A rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 6, characterized in that: The upper part (2-1-3) of the guide base is provided with an upwardly extending first clamping protrusion (2-1-3-2), and the top head (2-2) is provided with a second clamping protrusion (2-2-2). The first clamping protrusion (2-1-3-2), the upper part (2-1-3) of the guide base, the top head (2-2), and the second clamping protrusion (2-2-2) form a first sealing ring mounting groove. The first sealing ring (2-3) is installed in the first sealing ring mounting groove. The lower part (2-1-4) of the guide base is formed with a second sealing ring mounting groove, and the second sealing ring (2-4) is installed in the second sealing ring mounting groove.

9. A rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 1, characterized in that: It also includes an air inlet pipe (5), which is located at the air inlet end of the main valve body (1), and the air outlet end of the air inlet pipe (5) is connected to the medium channel (1-2). The air inlet end of the air inlet pipe (5) is connected to the air outlet end of the liquefied gas tank.

10. A rear-mounted right-angle oblique piston type liquefied petroleum gas overflow cut-off protection cylinder valve according to claim 1, characterized in that: The surface of the first sealing ring (2-3) that contacts the first sealing protrusion (1-1) is a conical surface, and the radius of the conical surface increases from top to bottom. The second sealing ring (2-4) is a Y-shaped ring.

Images