Gas injection micro-passage valve

Abstract

The utility model relates to a kind of gas injection micro exhaust valve, including valve shell and the float ball in valve shell, gas injection passage is opened in valve shell, still including micro exhaust valve flap, lever mechanism and valve flap assembly, micro exhaust hole is opened in valve flap assembly, valve flap assembly can move along its own axial direction;When valve flap assembly and valve shell are tightly abutted, gas injection passage is closed;When valve flap assembly and valve shell are separated, gas injection passage is opened;Micro exhaust valve flap is located below valve flap assembly, when micro exhaust valve flap blocks micro exhaust hole, trace exhaust passage is closed;Float ball is connected with valve flap assembly by lever mechanism, lever mechanism is used to adjust the distance between micro exhaust valve flap and micro exhaust hole.The utility model's gas injection micro exhaust valve uses integrated structure design, exhaust passage and gas injection passage are integrated in valve shell, realize the size of dimension reduction from structure layout, simultaneously greatly improve the force transmission efficiency by the force amplification principle of lever mechanism.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an air injection micro-discharge valve. Background Technology

[0002] Air vents are key devices used to regulate air trapped within pipeline systems, and are widely used in various engineering fields such as water supply and drainage, shipbuilding, and fluid transportation. During the initial startup and operation of a pipeline system, they quickly expel large amounts of accumulated air, preventing air from obstructing the flow of the medium and ensuring the system quickly reaches a stable operating state. When the pipeline system is operating normally, they continuously expel trace amounts of air that gradually precipitate from the medium, preventing long-term air accumulation and the formation of airlocks, thus ensuring efficient medium transport.

[0003] The related technology discloses an exhaust valve, which is a split type with a large valve size. Especially when the diameter of the micro-exhaust hole increases, it is necessary to further increase the size of the float and the valve. Utility Model Content

[0004] To address the shortcomings of existing valves that require a relatively large size to complete the venting and injection processes, the purpose of this invention is to provide a micro-venting valve that can satisfy both venting and injection functions while effectively reducing its size.

[0005] The technical solution provided by this utility model is as follows: A micro-injection valve includes a valve housing and a float located within the valve housing, the valve housing having an injection channel; it also includes a micro-injection valve disc, a lever mechanism, and a valve disc assembly, the lever mechanism being connected to the micro-injection valve disc; the valve disc assembly has a micro-injection hole and is movable along its own axis; when the valve disc assembly is in close contact with the valve housing, the injection channel is closed; when the valve disc assembly is separated from the valve housing, the injection channel is opened; wherein... The micro-exhaust valve is located below the valve assembly. When the micro-exhaust valve blocks the micro-exhaust hole, the micro-exhaust channel is closed. The float is connected to the valve assembly via a lever mechanism, which is used to adjust the distance between the micro-discharge valve and the micro-discharge orifice.

[0006] Furthermore, leveraged institutions include, A lever frame is located below and connected to the valve disc assembly, and the micro-discharge valve disc is movably connected to the lever frame along the axial direction of the valve disc assembly. A lever assembly, one end of which is adapted to abut against the micro-discharge valve disc, and the other side is hinged to a float; When the float causes the lever assembly to float upwards synchronously, the lever assembly pushes the micro-discharge valve disc to move towards the micro-discharge hole until the micro-discharge valve disc blocks the micro-discharge hole; When the float drives the lever assembly to fall synchronously, the thrust of the lever assembly on the micro-discharge valve is released, and the micro-discharge valve separates from the micro-discharge hole.

[0007] Furthermore, the lever component includes, The upper lever is hinged to the lever frame and rotates using this hinge point as the fulcrum; the micro-discharge valve is located above the top of the upper lever. The lower lever is hinged to the lever frame and rotates using this hinge point as the fulcrum; the lower lever is also hinged to the float; the length of the upper lever is less than the length of the lower lever. A connecting rod, one end of which is hinged to the upper lever and the other end of which is hinged to the lower lever.

[0008] Furthermore, the vertical distance from the pivot point of the upper lever to the central axis of the micro-discharge valve is L1, and the distance from the hinge point of the upper lever and the connecting rod to the pivot point of the upper lever is A, where L1 > A; The distance from the hinge point of the lower lever and the connecting rod to the rotation fulcrum of the lower lever is L2; ​​the distance from the rotation fulcrum of the lower lever to the hinge point of the lower lever and the float is B, where L2 > B; The force amplification factor formed by the lever assembly is: (L2 / B) × (L1 / A).

[0009] Furthermore, the valve housing includes a valve body and a valve cover, the valve cover being fitted onto the valve body and forming a sealed connection with the valve body; the valve disc assembly includes a guide rod and a valve disc body fixedly connected to the bottom of the guide rod; The micro-holes are located at the bottom of the guide rod; the guide rod is used to guide the valve disc body to reciprocate along its own axis.

[0010] Furthermore, the valve disc assembly also includes an elastic element; one end of the elastic element abuts against the valve cover, and the other end is connected to a guide rod.

[0011] Furthermore, the elastic element is sleeved on the guide rod, and the elastic element is located above the valve disc body.

[0012] Furthermore, the valve cover is provided with a guide shaft; the guide rod passes through the guide shaft and is slidably engaged with the guide shaft; When the valve disc body moves downward synchronously with the guide rod, the valve disc body separates from the valve cover, and the air injection channel opens.

[0013] Furthermore, the guide rod sidewall is provided with several through holes along the circumference, the through holes are located above the valve disc body, and the through holes are interconnected with the micro-drain holes.

[0014] Furthermore, it also includes a protective cover and a filter screen, the filter screen being located between the valve cover and the protective cover, the protective cover being detachably connected to the valve cover.

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages: (1) The air-injection micro-exhaust valve of this utility model adopts an integrated structural design, which integrates the exhaust channel and the air-injection channel in the valve body. By consolidating the space, the additional connection space and assembly gap required by the traditional separate structure are reduced, and the size is simplified in terms of structural layout. At the same time, the force transmission efficiency is greatly improved by taking advantage of the force amplification principle of the lever mechanism.

[0016] (2) The lever assembly of this utility model adopts a double lever structure design. Its core advantage is that it can efficiently transmit and amplify the gravity and buoyancy of the float through the two-stage force amplification effect. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the gas injection micro-discharge valve in one embodiment of this application; Figure 2 As one embodiment of this application Figure 1 A magnified view of a portion of node A; Figure 3 This is a schematic diagram of the lever mechanism structure in one embodiment of this application; Figure 4 This is a schematic diagram showing the location of the micro-holes in one embodiment of this application; Figure 5 This is a schematic diagram of the gas injection channel being opened in one embodiment of this application.

[0018] Explanation of the labels in the diagram: Valve body 1; Valve cover 2; Guide shaft 21; Float 3; Micro-discharge valve disc 4; Lever frame 51, upper lever 52, lower lever 53, connecting rod 54; Valve disc assembly 6; micro-drill hole 60, guide rod 61, valve disc body 62, elastic element 63; Protective shield 7; Filter screen 8. Detailed Implementation

[0019] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0020] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0021] The air-injection micro-venting valve is an automatic valve used in pipeline systems. Its core function is to balance pipeline pressure and release a small amount of gas. Through bidirectional regulation of automatic air injection when the pipeline is under negative pressure and automatic micro-venting when the pipeline is under normal pressure, it ensures the stable and efficient transportation of water or fluids. It is widely used in fluid transportation systems such as water supply, heating, and fire protection.

[0022] Negative pressure injection ensures safety. When negative pressure occurs in the pipeline (such as when a water pump starts or stops, or when a sudden change in flow causes a sudden drop in pressure), the valve will automatically open the injection channel to draw in outside air to balance the pressure inside the pipe. This prevents the pipeline from being sucked in and deformed due to negative pressure, or prevents water from vaporizing due to negative pressure, thus protecting the pipeline and system equipment.

[0023] At normal pressure, micro-venting improves efficiency. When the pressure inside the pipeline is normal, trace amounts of dissolved gases (such as air and oxidizing gases) in the water flow will continuously precipitate and accumulate. The valve will automatically open a micro-venting channel to slowly release these gases, preventing gas blockage in the pipeline, preventing water flow obstruction and flow rate reduction, and reducing the risk of pipeline aging due to gas corrosion.

[0024] This application discloses an air-injection micro-discharge valve, comprising a valve housing, a float 3, a micro-discharge valve disc 4, a lever mechanism, and a valve disc assembly 6. The valve housing has an air-injection channel and includes a valve body 1 and a valve cover 2. The float 3 is located inside the valve body 1, and the valve cover 2 covers the valve body 1 and seals against it.

[0025] The valve disc assembly 6 has a micro-drainage hole 60 and can move along its own axis: when the valve disc assembly 6 is in close contact with the valve cover 2, the air injection channel is closed, blocking the large inflow of external air or medium; when the valve disc assembly 6 is separated from the valve cover 2, the air injection channel is opened, and external medium can be quickly introduced to balance the pressure inside and outside the pipeline.

[0026] The micro exhaust valve 4 is located below the valve assembly 6, and its position corresponds to the micro exhaust hole 60: when the micro exhaust valve 4 moves upward and blocks the micro exhaust hole 60, the micro exhaust channel is closed to prevent the medium in the pipeline from leaking through the micro exhaust hole 60; when the micro exhaust valve 4 separates from the micro exhaust hole 60, the micro exhaust channel is opened, and the micro gas accumulated in the pipeline can be discharged through the micro exhaust hole 60.

[0027] The float 3 is connected to the valve assembly 6 through a lever mechanism. More specifically, the lever mechanism amplifies the displacement and force of the float 3 through the lever arm ratio, so that the smaller float 3 can drive the valve assembly 6 to complete the opening and closing action of the air injection channel, effectively reducing the volume of the float 3, thereby reducing the overall size of the entire valve and realizing the compact design of the device.

[0028] Meanwhile, the lever mechanism can precisely control the distance between the micro-exhaust valve 4 and the micro-exhaust hole 60 through its own rotation adjustment, flexibly realize the opening and closing of the micro-exhaust channel, and meet the exhaust needs under different working conditions.

[0029] More specifically, the lever mechanism is movably connected to the micro-discharge valve 4. The lever mechanism includes a lever frame 51 and a lever assembly. The lever frame 51 is located below the valve assembly 6 and is fixedly connected to the valve assembly 6. The micro-discharge valve 4 and the lever frame 51 are movably connected along the axial direction of the valve assembly 6. One side of the lever assembly is hinged to the lever frame 51, and the other side is hinged to the float 3. One end of the lever assembly is adapted to abut against the micro-discharge valve 4.

[0030] When the float 3 drives the lever assembly to float upwards, the lever assembly will push the micro-discharge valve 4 upwards, causing it to move along the axis of the valve assembly 6 towards the micro-discharge hole 60 until the micro-discharge valve 4 completely adheres to and blocks the micro-discharge hole 60, cutting off the micro-discharge channel.

[0031] When the float 3 drives the lever assembly to fall synchronously, the upward thrust of the lever assembly on the micro-discharge valve 4 is released, and the micro-discharge valve 4 separates from the micro-discharge hole 60 under its own gravity or medium pressure, and the micro-discharge channel is opened.

[0032] In this embodiment, the lever assembly adopts a double lever design, specifically including an upper lever 52, a lower lever 53 and a connecting rod 54: the upper lever 52 is hinged to the lever frame 51 and rotates flexibly around the hinge point as the rotation axis. The micro-discharge valve 4 is located above the top of the upper lever 52 and can directly receive the thrust of the upper lever 52.

[0033] The lower lever 53 is also hinged to the lever frame 51 and rotates around the hinge point as the axis of rotation. At the same time, the lower lever 53 is hinged to the float 3. The length of the upper lever 52 is less than the length of the lower lever 53.

[0034] One end of the connecting rod 54 is hinged to the upper lever 52, and the other end is hinged to the lower lever 53, so as to achieve stable transmission of force and displacement.

[0035] It is worth noting that the lower lever 53 has two hinge points at each end: one end is hinged to the connecting rod 54, and the other end is hinged to the float 3. The hinge point between the lower lever 53 and the lever frame 51 (i.e., the fulcrum of rotation of the lower lever 53) is located in the rod area between the two hinge points, forming a lever structure with forces at both ends and support in the middle.

[0036] The double-lever structure effectively reduces the volume of float 3, thereby reducing the overall size of the valve, through the following design: The vertical distance from the pivot point of the upper lever 52 to the central axis of the micro-discharge valve disc 4 is marked as L1 (power arm), and the distance from the hinge point of the upper lever 52 and the connecting rod 54 to the pivot point of the upper lever 52 is marked as A (resistance arm), where L1 > A.

[0037] The distance from the hinge point of the lower lever 53 and the connecting rod 54 to the fulcrum of the lower lever 53 is marked as L2 (power arm), and the distance from the fulcrum of the lower lever 53 to the hinge point of the lower lever 53 and the float 3 is marked as B (resistance arm), where L2 > B.

[0038] Based on the lever arm ratio of the two lever segments, the force amplification factor of the entire lever assembly is (L2 / B) × (L1 / A). Taking L2=65mm, B=15mm and L1=30mm, B=15mm as an example, the force amplification factor of the lever assembly is 8.6.

[0039] Through this force amplification effect, when the float 3 rises, the buoyancy it experiences is amplified after being transmitted through the lever assembly, ultimately significantly enhancing the thrust acting on the micro-discharge valve 4. Taking a buoyancy force of 10N applied to the float as an example, the final force generated on the micro-discharge valve 4 is 10N × 8.6 = 86N, which ensures that the micro-discharge valve 4 tightly seals the micro-discharge hole 60.

[0040] Similarly, when the float 3 falls, its own weight is amplified through the reverse transmission of the lever assembly, which effectively relieves the thrust on the micro-discharge valve disc 4, allowing the micro-discharge valve disc 4 to quickly separate from the micro-discharge orifice 60. This design ensures the accuracy and reliability of the operation of the micro-discharge valve disc 4 and the valve disc assembly 6, and because the valve can be driven by a small amount of buoyancy or gravity, the volume of the float 3 and the overall size of the valve can be reduced.

[0041] Furthermore, according to the design formula πd for the micro-discharge valve 2 / 4×P≥F, where d is the diameter of the micro-discharge orifice 60, P is the medium pressure on the micro-discharge orifice 60, πd² / 4×P refers to the total thrust of the medium on the micro-discharge valve disc 4, and F is the total resistance that prevents the micro-discharge valve disc 4 from opening.

[0042] When the diameter of the micro-discharge orifice 60 increases, the size of the float 3 needs to be significantly increased for the direct-discharge valve in the prior art. However, due to the lever mechanism described above, the force amplification factor is formed in this application, which can effectively reduce the size of the float 3.

[0043] The valve disc assembly 6 includes a guide rod 61, a valve disc body 62 fixedly connected to the bottom of the guide rod 61, and an elastic element 63. Micro-aperture holes 60 are formed in the bottom region of the guide rod 61. The core function of the guide rod 61 is to provide precise guidance for the reciprocating movement of the valve disc body 62 along its own axis, ensuring that the valve disc body 62 does not deviate from the preset trajectory during movement, thereby improving the stability of sealing and operation.

[0044] The elastic element 63 is sleeved on the guide rod 61, with one end of the elastic element 63 abutting against the valve cover 2 and the other end fixedly connected to the end of the guide rod 61 that is relatively far away from the valve disc body 62. The elastic element 63 is preferably in a pre-compressed state, so that the elastic element 63 always maintains a certain pre-tightening force.

[0045] In addition, the elastic element 63 is preferably a spring and is located above the valve disc body 62, so that the spring can be prevented from being immersed in the medium, causing problems such as rusting, and it is also convenient to adjust the spring.

[0046] Under normal pipeline pressure conditions, the preload is transmitted to the valve body 62 through the guide rod 61, ensuring that the valve body 62 and the valve cover 2 are tightly fitted together to achieve a reliable seal. When the gas injection process ends and the external force driving the valve body 62 to open disappears, the preload of the elastic element 63 can be quickly released, and the valve body 62 is reset through the guide rod 61 and re-sealed with the valve cover 2, effectively ensuring the response speed and action accuracy of the valve during opening and closing.

[0047] The valve cover 2 is provided with a guide shaft 21, and the guide rod 61 passes through the guide shaft 21 and forms a sliding fit with it. The guide shaft 21 further enhances the guiding effect and together with the guide rod 61, it forms a double guiding structure, which effectively avoids the sealing failure or action jamming problem caused by radial offset of the valve disc body 62.

[0048] The gas injection micro-discharge valve of this application also includes a protective cover 7 and a filter screen 8. The filter screen 8 is located between the valve cover 2 and the protective cover 7, and can filter the medium entering the valve to intercept impurities. The protective cover 7 and the valve cover 2 are detachably connected, which facilitates periodic disassembly for cleaning and replacement of the filter screen 8, or for inspection and maintenance of internal components such as the guide rod 61 and the elastic element 63, thereby improving the ease of maintenance of the equipment.

[0049] When the valve disc body 62 moves downward synchronously with the guide rod 61, the valve disc body 62 separates from the valve cover 2, and the air injection channel opens accordingly, allowing the medium to achieve the predetermined air injection function. When the valve disc body 62 is in close contact with the valve cover 2, under the elastic force of the elastic element 63, the top of the guide rod 61 abuts against the protective cover 7. This design uses the protective cover 7 to mechanically limit the top of the guide rod 61, preventing the elastic element 63 from being over-compressed.

[0050] The guide rod 61 has several through holes circumferentially formed on its side wall. These through holes are located above the valve disc body 62 and are interconnected with the micro-discharge holes 60. This interconnected design forms a complete medium flow path. When the micro-discharge holes 60 are not blocked, the medium can first enter the guide rod 61 through the micro-discharge holes 60, and then be discharged outward through the through holes in the side wall. This ensures discharge efficiency and also allows for more uniform medium discharge through the circumferentially distributed through hole structure.

[0051] The micro-discharge valve disc 4 is equipped with a flexible material specifically designed to seal the micro-discharge orifice 60. The properties of the flexible material allow it to deform to a certain extent when in contact with the micro-discharge orifice 60, tightly fitting the edge of the orifice and thus achieving a reliable seal. At the same time, this material has good elasticity and wear resistance, maintaining sealing performance during frequent sealing and opening operations and reducing wear on the micro-discharge orifice 60 caused by hard contact.

[0052] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A micro-ventilation valve for gas injection, characterized in that: include, Valve housing and float (3) located inside the valve housing, wherein the valve housing is provided with an air injection channel; Micro-discharge valve disc (4); Lever mechanism, which is connected to the micro-discharge valve disc (4). A valve disc assembly (6) is provided with micro-drainage holes (60), and the valve disc assembly (6) is movable along its own axis; when the valve disc assembly (6) abuts against the valve housing, the air injection channel is closed; when the valve disc assembly (6) separates from the valve housing, the air injection channel is opened; wherein, The micro-exhaust valve (4) is located below the valve assembly (6). When the micro-exhaust valve (4) blocks the micro-exhaust hole (60), the micro-exhaust channel is closed. The float (3) is connected to the valve assembly (6) via a lever mechanism, which is used to adjust the distance between the micro-discharge valve (4) and the micro-discharge hole (60).

2. The gas injection micro-discharge valve according to claim 1, characterized in that: Leveraged institutions include, Lever frame (51), which is located below the valve disc assembly (6) and connected to the valve disc assembly (6); A lever assembly, one end of which is adapted to abut against the micro-discharge valve disc (4), and the other side is hinged to the float (3); When the float (3) drives the lever assembly to float synchronously, the lever assembly pushes the micro-discharge valve (4) to move towards the micro-discharge hole (60) until the micro-discharge valve (4) blocks the micro-discharge hole (60). When the float (3) drives the lever assembly to fall synchronously, the thrust of the lever assembly on the micro-discharge valve (4) is released, and the micro-discharge valve (4) separates from the micro-discharge hole (60).

3. The gas injection micro-discharge valve according to claim 2, characterized in that: Lever components include, The upper lever (52) is hinged to the lever frame (51) and the hinge point is used as the fulcrum for rotation; the micro-discharge valve (4) is located above the top of the upper lever (52); The lower lever (53) is hinged to the lever frame (51) and the hinge point is used as the fulcrum of rotation; the lower lever (53) is also hinged to the float (3); the length of the upper lever (52) is less than the length of the lower lever (53); A connecting rod (54) is hinged at one end to the upper lever (52) and at the other end to the lower lever (53).

4. The gas injection micro-discharge valve according to claim 3, characterized in that: The vertical distance from the pivot point of the upper lever (52) to the central axis of the micro-discharge valve (4) is L1, and the distance from the hinge point of the upper lever (52) and the connecting rod (54) to the pivot point of the upper lever (52) is A, where L1 > A; The distance from the hinge point of the lower lever (53) and the connecting rod (54) to the rotation fulcrum of the lower lever (53) is L2; ​​the distance from the rotation fulcrum of the lower lever (53) to the hinge point of the lower lever (53) and the float (3) is B, L2>B.

5. The gas injection micro-discharge valve according to claim 1, characterized in that: The valve housing includes a valve body (1) and a valve cover (2), the valve cover (2) covers the valve body (1) and forms a sealed connection with the valve body (1); the valve disc assembly (6) includes a guide rod (61) and a valve disc body (62) fixedly connected to the bottom of the guide rod (61). The micro-holes (60) are opened in the bottom area of ​​the guide rod (61); the guide rod (61) is used to guide the valve disc body (62) to reciprocate along its own axis.

6. The gas injection micro-discharge valve according to claim 5, characterized in that: The valve assembly (6) also includes an elastic element (63); one end of the elastic element (63) abuts against the valve cover (2), and the other end is connected to the guide rod (61).

7. The gas injection micro-discharge valve according to claim 6, characterized in that: The elastic element (63) is sleeved on the guide rod (61), and the elastic element (63) is located above the valve disc body (62).

8. A micro-gas injection valve according to claim 6, characterized in that: The valve cover (2) is provided with a guide shaft (21); the guide rod (61) passes through the guide shaft (21) and slides with the guide shaft (21); When the valve body (62) moves the guide rod (61) downward in sync, the valve body (62) separates from the valve cover (2), and the air injection channel is opened.

9. A micro-ventilation valve for gas injection according to claim 5, characterized in that: The guide rod (61) has several through holes along its circumferential direction on its side wall. The through holes are located above the valve disc body (62) and are interconnected with the micro-drainage holes (60).

10. A micro-gas injection valve according to claim 6, characterized in that: It also includes a protective cover (7) and a filter screen (8), the filter screen (8) being located between the valve cover (2) and the protective cover (7), the protective cover (7) being detachably connected to the valve cover (2).

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