Liquid cut-off leakproof valve
By designing a liquid-blocking leakage-proof valve including external joints, internal joints, valve seats and valves, the problems of complex structure and poor leakage-proof effect of gas station pull-off valves are solved, and simple and easy processing and efficient sealing are achieved, avoiding damage to internal parts and liquid leakage.
Patent Information
- Application Number
- CN202422249310.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing gas station pull-off valve has a complex structure, is not easy to process, has poor leakage prevention effect and is easy to damage, which poses safety hazards.
A liquid-blocking leakage-proof valve including external joints, internal joints, valve seats and valves is designed to achieve reliable cut-off of internal and external joints through limiting pins and spring mechanisms, and is equipped with seals and a stop ring to improve sealing.
It achieves a simple structure and easy processing, reduces costs, and protects internal parts from damage after the inner joint is cut off, improves the sealing effect and avoids liquid leakage.
Smart Images
Figure CN223120751U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of breakaway valves, and particularly relates to a liquid cut-off and leakage-proof valve for the safety protection of fuel nozzles at gas stations. Background Art
[0002] After refueling a vehicle at a gas station in the current market, it often happens that the vehicle starts without retracting the fuel nozzle. At this time, the vehicle will drag the fuel nozzle, and finally cause the fuel dispenser to tip over, resulting in the leakage of dangerous liquids such as gasoline and posing a safety hazard. To avoid the above safety hazards, a breakaway valve is generally installed between the fuel nozzle and the fuel hose at the gas station. When the vehicle drags, the breakaway valve can automatically fall off to protect the fuel dispenser from being dragged by the vehicle. The internal structure of the currently used breakaway valve is complex, not easy to process, and will also affect the liquid flow. Moreover, when the breakaway valve is dragged and opened, it cannot completely block the liquid leakage, and still a small amount of liquid will continuously seep out, having a certain safety risk; and one end of the breakaway valve connected to the oil pipe will fall to the ground, easily causing damage to internal parts. Content of the Utility Model
[0003] To solve the problems of the prior art, the utility model proposes a liquid cut-off and leakage-proof valve, which solves the problems of the currently used breakaway valve with complex structure, not easy to process, poor leakage-proof effect and easy to damage.
[0004] The purpose of the utility model and the solution to its technical problems are achieved by adopting the following technical solutions. A liquid cut-off and leakage-proof valve proposed according to the utility model includes an outer joint, an inner joint, a valve seat and a valve. The outer joint is sleeved on the inner joint, and a breakaway ring is provided between the outer joint and the inner joint. The valve and the valve seat are arranged inside the inner joint, and a spring is provided between the valve and the valve seat. A limiting ejector rod is provided at the central position of the outer joint, and a first long shaft is provided on the side of the limiting ejector rod close to the valve. The first long shaft abuts against the valve so that the valve is concave when the inner joint and the outer joint are cut off. A second long shaft is connected to the side of the valve close to the valve seat, and the second long shaft passes through the spring and is slidably installed with the valve seat.
[0005] The beneficial effects are as follows: The structure of the utility model is simple and easy to process, which can effectively reduce costs; and by setting the first long shaft, after the inner and outer joints are cut off, the internal parts thereof will not be exposed, and the problem that the internal parts are easily damaged when the inner joint falls can be avoided.
[0006] Further, a first annular groove is provided on the maximum outer diameter of the valve, and a first seal is provided in the annular groove.
[0007] The beneficial effects are as follows: Setting a soft seal can improve the sealing effect and reduce liquid leakage.
[0008] Further, a rotation prevention ring is provided between the outer joint and the inner joint.
[0009] The beneficial effects are as follows: It can prevent relative rotation between the inner and outer joints.
[0010] Furthermore, the described valve seat is screwed into the inner joint.
[0011] The beneficial effects are as follows: It can facilitate the installation and disassembly of the valve seat.
[0012] Furthermore, a second annular groove is provided on the inner joint, and a second sealing member for sealing when sleeved with the outer joint is provided in the second annular groove.
[0013] The beneficial effects are as follows: It can improve the sealing performance between the inner and outer joints and avoid liquid leakage when the pull - off valve is connected.
[0014] Furthermore, a sliding portion for cooperating with the second long shaft to move axially is provided on the valve seat.
[0015] The beneficial effects are as follows: It can better guide the valve and facilitate the opening or truncation of the pull - off valve.
[0016] In summary, the parts of the present utility model have a simple structure, are convenient for processing, can reduce production costs. At the same time, when the inner and outer joints are truncated, the parts inside will not be exposed, and the problem that the internal parts are easily damaged when the inner joint falls can be avoided.
[0017] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above - mentioned and other purposes, features and advantages of the present utility model more obvious and understandable, the following preferred embodiments are specifically given and described in detail in conjunction with the drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of the present utility model.
[0019] Figure 2 is a schematic structural diagram of the present utility model in the normal working state.
[0020] Figure 3 is a schematic structural diagram of the present utility model in the pull - off state. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The technical solution of the present utility model will be further described below in conjunction with the drawings and preferred embodiments.
[0022] An embodiment of a liquid cut - off and leak - proof valve:
[0023] As Figure 1As shown in the figure, a liquid cut-off leak-proof valve includes an outer joint 1, an inner joint 4, a valve seat 5 and a valve 8. The outer joint 1 is sleeved on the inner joint 4, and the inner joint 4 is press-fitted with the outer joint 1. A breaking ring 2 is provided between the outer joint 1 and the inner joint 4. The valve 8 and the valve seat 5 are arranged inside the inner joint 4. A spring 6 is provided between the valve 8 and the valve seat 5, and the spring 6 is in contact with the end faces of the valve 8 and the valve seat 5. A limiting ejector rod 10 is provided at the central position of the outer joint 1. A first long shaft 11 is provided on the side of the limiting ejector rod 10 close to the valve 8. The first long shaft 11 abuts against the valve 8 so that the valve 8 is concave when the inner joint 4 and the outer joint 1 are cut off. The valve 8 includes a rod part and a sealing part and is of an integral structure. The first long shaft 11 contacts the rod part of the valve 8. A second long shaft 12 is connected to the side of the valve 8 close to the valve seat 5. The second long shaft 12 passes through the spring 6 and is slidably installed with the valve seat 5.
[0024] Working principle: When the leak-proof valve is in normal use, the valve 8 is pushed open by the first long shaft 11 on the limiting ejector rod 10, and the oil passage is opened. When an external force is received, through the action of the breaking ring 2, the inner joint 4 and the outer joint 1 are disconnected. The first long shaft 11 no longer pushes the valve 8. At the same time, the valve 8 receives the rebound of the spring 6 and undergoes displacement. Its sealing surface contacts the sealing end face of the inner joint 4, and the oil passage is closed. At the same time, some parts of the valve 8 will not protrude from the inner joint 4, which can protect it from damage.
[0025] In this embodiment, a first annular groove is provided on the maximum outer diameter of the valve 8, and a first sealing member 7 is provided in the annular groove. The soft seal is provided to improve the sealing effect and reduce liquid leakage.
[0026] In this embodiment, a rotation prevention ring 3 is provided between the outer joint 1 and the inner joint 4. The inner joint 4 and the outer joint 1 are tightly fitted together through the rotation prevention ring 3, which can prevent relative rotation between the inner and outer joints.
[0027] In this embodiment, the valve seat 5 is screwed into the inner joint 4, which can facilitate the installation and disassembly of the valve seat.
[0028] In this embodiment, a second annular groove is provided on the inner joint 4, and a second sealing member 9 is provided in the second annular groove for sealing when sleeved with the outer joint 1, which can improve the sealing performance between the inner and outer joints and avoid liquid leakage when the break valve is connected.
[0029] In this embodiment, a sliding part 13 for cooperating with the second long shaft 12 to move axially is provided on the valve seat 5, which can play a better guiding role for the valve 8 and facilitate the opening or cutting off of the break valve.
[0030] The above are only the preferred embodiments of the present utility model. Any person skilled in the relevant art, without departing from the scope of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A liquid cut-off anti-leakage valve, comprising an outer joint (1), an inner joint (4), a valve seat (5) and a valve (8), wherein the outer joint (1) is sleeved on the inner joint (4), and a breaking ring (2) is arranged between the outer joint (1) and the inner joint (4), and is characterized in that: The valve (8) and the valve seat (5) are arranged inside the inner joint (4). A spring (6) is arranged between the valve (8) and the valve seat (5). A limiting ejector rod (10) is arranged at the central position of the outer joint (1). A first long shaft (11) is arranged on one side of the limiting ejector rod (10) close to the valve (8). The first long shaft (11) abuts against the valve (8) so that the valve (8) is concave when the inner joint (4) and the outer joint (1) are cut off. A second long shaft (12) is connected to one side of the valve (8) close to the valve seat (5). The second long shaft (12) passes through the spring (6) and is slidably installed with the valve seat (5).
2. The liquid cut-off leak-proof valve according to claim 1, wherein: A first annular groove is arranged on the maximum outer diameter of the valve (8), and a first seal (7) is arranged in the annular groove.
3. The liquid cutoff and leakage prevention valve according to claim 1, wherein: An anti-rotation ring (3) is arranged between the outer joint (1) and the inner joint (4).
4. The liquid cutoff and leakage prevention valve according to claim 1, characterized in that: The valve seat (5) is screwed into the inner joint (4).
5. The liquid cut-off leak-proof valve according to claim 4, characterized in that: A second annular groove is arranged on the inner joint (4), and a second seal (9) is arranged in the second annular groove for sealing when sleeved with the outer joint (1).
6. The liquid cutoff and leakage prevention valve according to claim 4, characterized in that: The valve seat (5) is provided with a sliding part (13) for cooperating with the second long shaft (12) to move axially.