Normally closed valve for fuel gas
By designing a normally closed gas valve and utilizing a blocking slider and drive structure, the problem of gas shut-off valves not being able to be automatically controlled was solved, thus improving safety and cost-effectiveness.
Patent Information
- Application Number
- CN202423243957.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing gas shut-off valves cannot automatically open when the gas is ignited and automatically close when the gas is shut off, posing safety hazards and having a complex structure and high cost.
Design a normally closed valve for gas supply, employing a blocking slider and a drive structure. Utilize the gas pressure difference to automatically control the opening and closing of the valve, ensuring that the gas pipeline is blocked when closed and automatically opened when ignited.
It enables automatic sealing of gas pipelines when closed, control of leakage when leaking, and automatic opening when ignited, ensuring safety, simplifying the structure, and reducing costs.
Smart Images
Figure CN223635334U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, concretely relates to a normally closed valve for gas. BACKGROUND
[0002] At present, in order to ensure gas safety, staff will enter the house regularly to check whether there is gas leakage, and try to ensure gas safety, but in the middle of adjacent detection nodes, that is, in the time period between the detection and the next detection, ordinary personnel without professional knowledge and professional tools are difficult to judge once gas leakage occurs.
[0003] To solve the problem of gas leakage, gas automatic cut-off valves appear on the market, which judge whether there is gas leakage by detecting the gas concentration in the room, and automatically control the valve to close once gas leakage occurs.
[0004] But the whole principle of the existing gas cut-off valve is still to keep the gas pipeline in the open state, and cannot be opened with the ignition of the gas stove or gas water heater and automatically cut off with its closing, not only the safety problem caused by gas leakage cannot be eradicated, and the overall structure of the valve is also very complex, and the manufacturing cost is high.
[0005] Based on this, the inventor designs a normally closed valve for gas to solve at least one of the above problems, thus the present application is proposed. SUMMARY
[0006] The purpose of the present application is to provide a normally closed valve for gas, which solves the problem that the existing gas cut-off valve cannot be automatically opened with the ignition of gas and automatically closed with the closing of gas, and still has safety hazards.
[0007] To solve the above technical problems, the utility model adopts the following schemes:
[0008] The present application provides a normally closed valve for gas, comprising a valve body with a straight sliding channel, and a blocking sliding block for blocking and cutting off the sliding channel and freely sliding in the sliding channel.
[0009] The valve body is further provided with a driving structure for driving the blocking sliding block to slide, and the driving structure is axially located at the end of the sliding channel.
[0010] Further comprising an air inlet connector and an air outlet connector perpendicular to the sliding channel and located at both ends thereof respectively.
[0011] The sliding channel is provided with an annular blocking ring between the gas inlet joint and the gas outlet joint, the blocking sliding block is located on the side of the annular blocking ring facing the gas outlet joint, and the side of the sliding channel close to the gas outlet joint extends outward along the axial direction and is provided with a stop cavity for accommodating the blocking sliding block.
[0012] Optionally, the sliding channel further extends outward along the axial direction at the end away from the stop cavity and is provided with a mounting cavity;
[0013] The driving structure is an attractive element arranged in the mounting cavity, and the blocking sliding block is made of magnetic material or ferrous alloy.
[0014] Optionally, the sliding channel and the stop cavity of the valve body are both provided with a non-metal layer.
[0015] Optionally, the attractive element is a permanent magnet, and the blocking sliding block is ferrous alloy.
[0016] Optionally, the blocking sliding block is in a cylindrical shape.
[0017] The side of the blocking sliding block close to the annular blocking ring is further provided with an elastic pad.
[0018] Optionally, the side of the annular blocking ring close to the blocking sliding block is provided with an elastic washer.
[0019] The blocking sliding block is in a spherical shape.
[0020] Optionally, the side of the elastic washer close to the blocking sliding block is in a circular arc shape matching the cross section of the spherical blocking sliding block.
[0021] Optionally, the axes of the gas inlet joint and the gas outlet joint are parallel to each other, or the included angle between the two axes is 90°.
[0022] The utility model has the advantages of:
[0023] The valve can be in a closed state when the gas is not used, and when the pressure in the gas pipeline is balanced, the driving structure is used to drive the blocking sliding block to move, so that the sliding channel is blocked, and the blocking and cutting off of the gas channel are completed.
[0024] When the gas channel is cut off, the gas between the blocking sliding block and the ignition position in the gas pipeline is quickly consumed after the gas is ignited, and when the pressure is lower than the atmospheric pressure, the pressure difference on both sides of the blocking sliding block is sufficient to overcome the force applied by the driving structure to the blocking sliding block, so that the blocking sliding block is pushed to move, and after the gas pipeline is connected, the flowing gas is used to continuously push the blocking sliding block to move into the stop cavity, so as to avoid affecting the normal flow of the gas and ensure the safe and stable operation of the gas.
[0025] When the gas pipeline is in the closed state, if a small flow of gas leaks, the gas pipeline is closed, the gas pressure in the gas pipeline is at most released to the atmospheric pressure, and the total amount of gas leakage is limited, so that the risk of excessive indoor gas concentration can be avoided.
[0026] Therefore, the application can ensure that the entire gas pipeline is closed when the gas is closed, can ensure the total amount of gas leakage even if gas leakage occurs, and can be automatically pushed open because the pressure on the side of the closing sliding block close to the outlet joint is rapidly reduced to below the atmospheric pressure when the gas is ignited, thereby achieving the technical effects of automatic closing after the gas is closed and automatic opening after the gas is ignited, and the existing technical problems can be effectively solved. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 FIG. 1 is a structural schematic view of the application in Example 1 when the gas is closed.
[0028] Figure 2 FIG. 2 is a structural schematic view of the application in Example 1 when the gas is ignited.
[0029] Figure 3 FIG. 3 is a structural schematic view of the closing sliding block pressing on the elastic gasket in Example 2 of the application.
[0030] The reference signs are as follows: 1, valve body; 11, gas inlet joint; 12, gas outlet joint; 13, sliding channel; 14, pause cavity; 15, installation cavity; 2, closing sliding block; 3, annular blocking ring; 4, attractive member; 5, elastic gasket; 6, non-metal layer; and 7, elastic gasket. DETAILED DESCRIPTION
[0031] The application will be further described in detail below in combination with the embodiments and the drawings, but the embodiments of the application are not limited thereto.
[0032] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "back", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0033] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "set", "open", "install", "connect", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the above-mentioned terms can be understood in the specific meaning in the utility model according to specific circumstances.
[0034] The utility model will be described in detail below by referring to the drawings and combining with the embodiments.
[0035] Embodiment 1
[0036] As Figure 1 And Figure 2 The utility model discloses a normally closed valve for gas, which comprises a valve body 1 with a linear sliding channel 13 and a blocking sliding block 2 for blocking and cutting off the sliding channel 13 and capable of freely sliding in the sliding channel 13.
[0037] The valve body 1 is further provided with a driving structure for driving the blocking sliding block 2 to slide, which is located at the end of the sliding channel 13 along the axial direction.
[0038] The utility model further comprises an air inlet connector 11 and an air outlet connector 12 which are arranged perpendicularly to the sliding channel 13 and located at the two ends thereof respectively.
[0039] The sliding channel 13 is provided with an annular blocking ring 3 between the air inlet connector 11 and the air outlet connector 12, and the blocking sliding block 2 is located on the side of the annular blocking ring 3 facing the air outlet connector 12, and the side of the sliding channel 13 close to the air outlet connector 12 extends outward along the axial direction and has a stop cavity 14 for accommodating the blocking sliding block 2.
[0040] The valve of the utility model can be in a closed state when the gas is temporarily not used, and when the pressure in the gas pipeline is balanced, the driving structure is used to drive the blocking sliding block 2 to move, so as to block the sliding channel and complete the blocking and cutting off action of the gas channel.
[0041] When the gas channel is cut off, after the gas is ignited, the gas between the blocking sliding block 2 and the ignition position in the gas pipeline is quickly consumed until it is lower than the atmospheric pressure, so that the pressure difference on both sides of the blocking sliding block 2 is enough to overcome the force exerted by the driving structure on the blocking sliding block 2, and the blocking sliding block 2 is pushed to move, and after the gas pipeline is connected, the flowing gas is used to continuously push the blocking sliding block 2 to move into the stop cavity 14, so as to avoid affecting the normal flow of the gas and ensure the safe and stable operation of the gas.
[0042] When the gas pipeline is in the closed state, if a small amount of gas leaks, the gas pipeline is closed, the gas pressure in the gas pipeline is at most released to the atmospheric pressure, and the total amount of gas leakage is limited, so that the risk of excessive indoor gas concentration can be avoided.
[0043] Therefore, in the embodiment, the driving structure is arranged to continuously apply force to the blocking slider 2, and the pressure difference between the two sides of the blocking slider 2 can drive the blocking slider 2 to move and open. When the gas is closed, the entire gas pipeline can be closed. Even if gas leaks, the total amount of gas leakage can be ensured. When the gas is ignited, the pressure on the side of the blocking slider 2 close to the outlet joint can be quickly reduced to below the atmospheric pressure, so that the blocking slider 2 can be automatically pushed away. The technical effects of automatic blocking after the gas is closed and automatic opening after the gas is ignited can effectively solve the problems in the prior art.
[0044] Specifically, in the embodiment, the sliding channel 13 further extends outward along its axis at one end away from the stop cavity 14 to form a mounting cavity 15;
[0045] The driving structure is an attractive element 4 arranged in the mounting cavity 15. The blocking slider 2 is made of magnetic material or ferrous alloy. By arranging the attractive element 4 and the blocking slider 2 made of ferrous alloy, the influence of other structures on the gas passage can be avoided, the service life of the valve can be improved, and the manufacturing difficulty and cost of the valve can be reduced.
[0046] Specifically, in the embodiment, a non-metal layer 6 is arranged in the sliding channel 13 and the stop cavity 14 of the valve body 1. The non-metal layer 6 in the embodiment is a plastic layer. The plastic layer can ensure the stability of the structure and avoid the rusting problem caused by the use of steel. In the embodiment, the valve body 1 can be made of steel to ensure the strength of the valve.
[0047] Specifically, in the embodiment, the attractive element 4 is a permanent magnet, and the blocking slider 2 is made of ferrous alloy.
[0048] Specifically, in the embodiment, the shape of the blocking slider 2 is cylindrical.
[0049] The side of the blocking slider 2 close to the annular blocking ring 3 is further provided with an elastic pad layer 5. The elastic pad layer 5 in the embodiment is made of rubber material.
[0050] Specifically, in the embodiment, the axes of the gas inlet joint 11 and the gas outlet joint 12 are parallel to each other, which facilitates the wiring of the gas pipeline. In some embodiments, the included angle between the axes of the gas inlet joint 11 and the gas outlet joint 12 is 90°. Other angles can also be designed, and the technical personnel can set it according to the needs.
[0051] Embodiment 2:
[0052] As Figure 3 shown, on the basis of the above embodiment 1, the embodiment provides a normally closed valve for gas, and the annular blocking ring 3 is provided with an elastic washer 7 near one side of the blocking slider 2.
[0053] The shape of the blocking slider 2 is spherical, which reduces the friction resistance of the blocking slider 2 in the sliding channel 13.
[0054] Specifically, as Figure 3 shown in the embodiment, the cross section shape of the elastic washer 7 near one side of the blocking slider 2 is a circular arc shape matched with the cross section of the spherical blocking slider 2, so that the contact between the spherical blocking slider 2 and the elastic washer 7 is a surface area, and the blocking stability in the blocking state is improved.
[0055] The remaining structures of the embodiment are the same as those of the above embodiment 1, and will not be described here.
[0056] It can be understood that the above implementation is only an exemplary implementation adopted for illustrating the principle of the utility model, and the utility model is not limited to this. For ordinary skilled persons in the art, various modifications and improvements can be made without departing from the spirit and essence of the utility model, and these modifications and improvements are also regarded as the protection scope of the utility model.
Claims
1. A normally closed valve for gas, characterized in that The utility model provides a valve body (1) with a straight sliding channel (13), and a blocking slider (2) for blocking the sliding channel (13) and freely sliding in the sliding channel (13); The valve body (1) is further provided with a driving structure for driving the blocking slider (2) to slide, which is axially located at the end of the sliding channel (13); The utility model further comprises an air inlet connector (11) and an air outlet connector (12) which are arranged perpendicularly to the sliding channel (13) and are respectively located at the two ends of the sliding channel (13); The sliding channel (13) is provided with an annular blocking ring (3) between the air inlet connector (11) and the air outlet connector (12), the blocking slider (2) is located on the side of the annular blocking ring (3) facing the air outlet connector (12), and the side of the sliding channel (13) close to the air outlet connector (12) extends axially outward to form a stop cavity (14) for accommodating the blocking slider (2).
2. A normally closed valve for gas according to claim 1, characterized in that The end of the sliding channel (13) away from the stop cavity (14) further extends axially outward to form a mounting cavity (15); The driving structure is an attractive element (4) arranged in the mounting cavity (15), and the blocking slider (2) is made of magnetic material or ferrous alloy.
3. A normally closed valve for gas according to claim 2, characterized in that The sliding channel (13) of the valve body (1) and the stop cavity (14) are both provided with a non-metal layer (6).
4. A normally closed valve for gas use according to claim 2, characterized in that The attractive element (4) is a permanent magnet, and the blocking slider (2) is ferrous alloy.
5. A normally closed valve for gas use according to claim 1, characterized in that, The shape of the blocking slider (2) is cylindrical. The side of the blocking slider (2) close to the annular blocking ring (3) is further provided with an elastic pad layer (5).
6. A normally closed valve for gas use according to claim 1, characterized in that, The side of the annular blocking ring (3) close to the blocking slider (2) is provided with an elastic washer (7). The shape of the blocking slider (2) is spherical.
7. A normally closed valve for gas according to claim 6, characterized in that The cross section of the side of the elastic washer (7) close to the blocking slider (2) is arc-shaped, which is matched with the cross section of the spherical blocking slider (2).
8. A normally closed valve for gas use according to claim 1, characterized in that, The axes of the air inlet connector (11) and the air outlet connector (12) are parallel to each other, or the included angle between the two axes is 90°.