Quantitative elliptical gear metering gun

Abstract

The invention discloses a quantifiable elliptical gear metering gun which is connected with a refueling pump, the quantifiable elliptical gear metering gun comprises a gun body and a main valve opening and closing assembly, the gun body is internally provided with a main valve cavity channel, a connecting cavity channel, a metering cavity channel and an oil outlet cavity channel which are communicated in sequence, and the gun body is further internally provided with a mounting cavity and a diaphragm cavity which are communicated with each other; the main valve opening and closing assembly comprises a main valve, a piston sleeve, a core rod, a locking mechanism and a handle assembly, the diaphragm is fixed in the diaphragm cavity and divides the diaphragm cavity into a first chamber and a second chamber, and the first chamber communicates with the mounting cavity; the quantifiable elliptical gear metering gun further comprises a to-be-adsorbed piece, an electromagnet and a metering assembly. The to-be-adsorbed piece is arranged in the second chamber and connected with the diaphragm. The electromagnet is arranged in the second chamber and is spaced from the to-be-adsorbed part in the first direction; the metering assembly is arranged at the metering cavity channel and electrically connected with the electromagnet. According to the quantitative elliptical gear metering gun, the electromagnet is used for adsorbing the to-be-adsorbed part to achieve quantitative refueling.

Description

Technical Field

[0001] This application relates to the field of fuel nozzle technology, and in particular to a quantitative elliptical gear metering nozzle. Background Technology

[0002] The fuel nozzle is the terminal part of the fuel pump at a gas station, the part that contacts the car's fuel tank. Its main function is to transfer fuel from the fuel pump to the car's fuel tank.

[0003] Commonly used fuel nozzles on the market include self-sealing nozzles, combination nozzles, and oval gear metering nozzles, but none of these nozzles have a metering function. Therefore, there is currently a lack of fuel nozzle products that meet the needs of metered refueling. Summary of the Invention

[0004] The main purpose of this application is to provide a quantitative elliptical gear metering gun, which aims to solve the problem that commonly used fuel nozzles on the market do not have a quantitative function.

[0005] To achieve the above objectives, this application provides a metering elliptical gear metering gun connected to a refueling pump. The metering elliptical gear metering gun includes a gun body and a main valve opening / closing assembly. The gun body has a main valve chamber, a connecting chamber, a metering chamber, and an oil outlet chamber that are sequentially connected. The gun body also has an installation chamber and a diaphragm chamber that are interconnected. The main valve opening / closing assembly includes a main valve, a piston sleeve, a core rod, a locking mechanism, and a handle assembly. The diaphragm is fixed within the diaphragm chamber and divides the diaphragm chamber into a first chamber and a second chamber, the first chamber being connected to the installation chamber. The main valve is disposed within the main valve chamber and subjected to elastic force to block the connection between the main valve chamber and the connecting chamber. The piston sleeve is disposed within the installation chamber and penetrates the connecting chamber. The piston sleeve has the freedom to slide along its own axial direction to open the main valve. The core rod passes through the piston sleeve. The piston sleeve is slidably engaged with the piston sleeve; a locking mechanism is disposed in the second chamber and connected to the diaphragm, the locking mechanism having a degree of freedom to slide along a first direction, wherein when the locking mechanism moves closer to or further away from the piston sleeve along the first direction, the degree of freedom of the piston sleeve to slide relative to the core rod is locked or released; a handle assembly is disposed on the gun body and connected to the core rod, the handle assembly providing a sliding driving force for the core rod; the metering gun further includes a target adsorption element, an electromagnet and a metering component, the target adsorption element being disposed in the second chamber and connected to the diaphragm; the electromagnet being disposed in the second chamber and spaced apart from the target adsorption element in the first direction; the metering component being disposed at the metering channel, the metering component being used to measure the amount of oil flowing through the metering channel, wherein the metering component is electrically connected to the electromagnet.

[0006] Optionally, the quantitative elliptical gear metering gun further includes a first spring, one end of which is connected to the electromagnet and the other end of which is connected to the object to be adsorbed.

[0007] Optionally, the metering elliptical gear metering gun further includes a fixing member, a constricted section, and a secondary valve. The fixing member is located at one end of the oil outlet channel near the metering channel, and has an oil passage for oil flow. The constricted section is located at one end of the fixing member near the metering channel. The secondary valve is connected to the fixing member via a second spring, and the secondary valve responds to the thrust of the second spring to abut and block the constricted section.

[0008] Optionally, the fixing component has a fixed channel, and the metering elliptical gear measuring gun further includes an air inlet pipe, one end of which is connected to the fixed channel, and the other end is located at the end of the oil outlet channel away from the measuring channel; wherein, the gun body has a connecting channel to connect the fixed channel and the second chamber; and the constricted section is provided with a negative pressure channel connected to the connecting channel.

[0009] Optionally, the angle between the axial direction of the negative pressure channel and the axial direction of the constricted section is an acute angle.

[0010] Optionally, the end of the air intake pipe away from the fixed channel passes through the side wall of the oil outlet channel; wherein, in the connection area between the air intake pipe and the oil outlet channel, the axial direction of the air intake pipe is perpendicular to the axial direction of the oil outlet channel; in the direction of gravity, the end of the air intake pipe away from the fixed channel is located below the oil outlet channel.

[0011] Optionally, the end of the intake pipe away from the fixed channel is fixed to the port of the oil outlet channel; wherein, in the connection area between the intake pipe and the oil outlet channel, the axial direction of the intake pipe is parallel to the axial direction of the oil outlet channel; in the direction of gravity, the end of the intake pipe away from the fixed channel is located below the oil outlet channel.

[0012] Optionally, the quantitative elliptical gear metering gun further includes a cylinder, a base plate, a top plate, a fixed shaft, and a sliding block. One end of the cylinder is inserted into the air inlet pipe. The base plate is fixed to the end of the cylinder located inside the air inlet pipe, and a plurality of first air inlets are arranged around the base plate. The top plate is fixed to the end of the cylinder located outside the air inlet pipe, and a plurality of second air inlets are arranged around the top plate. The fixed shaft is fixed between the base plate and the top plate, and its axial direction coincides with the axial direction of the cylinder. The sliding block is sleeved on the outer periphery of the fixed shaft and slides with the fixed shaft, and the sliding block has the freedom to slide along the axial direction of the fixed shaft. The orthographic projection of the sliding block on the base plate covers each of the first air inlets, and the orthographic projection of the sliding block on the top plate is located on the inner periphery of the plurality of second air inlets arranged around the top plate.

[0013] Optionally, the cylinder is threadedly connected to the air inlet pipe.

[0014] Optionally, the quantitative elliptical gear metering gun further includes a soft pad, which is fixed to the side of the sliding block facing the base plate.

[0015] This application proposes a quantitative elliptical gear metering gun. During quantitative refueling, a target refueling amount can be set. Then, pressing the handle assembly pushes the core rod to move, which in turn moves the piston sleeve to open the main valve and start refueling. The metering component can measure the real-time refueling amount. When the real-time refueling amount equals the target refueling amount, the electromagnet is energized, attracting the object to be attracted. This causes the diaphragm to deform and moves the locking mechanism away from the piston sleeve. At this time, the piston sleeve and the core rod can slide relative to each other, preventing the core rod from pushing the piston sleeve to open the main valve. The main valve is then subjected to elastic force, pushing the piston sleeve to slide, thereby closing the main valve and stopping refueling. This achieves quantitative refueling. Attached Figure Description

[0016] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed herein.

[0018] Figure 1 This is a schematic diagram of the overall structure of a quantitative elliptical gear measuring gun proposed in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the internal structure of the Chinese embodiment; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle; Figure 5 This is a schematic diagram of the intake pipe structure according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the cylinder in an embodiment of this application; Figure 7 This is a schematic diagram of the internal structure of the cylinder according to an embodiment of this application.

[0019] In the diagram: 1. Gun body; 11. Main valve chamber; 12. Connecting chamber; 13. Metering chamber; 14. Oil outlet chamber; 15. Installation chamber; 16. Diaphragm chamber; 17. Connecting channel; 21. Diaphragm; 22. Main valve; 23. Piston sleeve; 24. Core rod; 25. Locking mechanism; 26. Handle assembly; 3. Item to be adsorbed; 4. Electromagnet; 5. Metering assembly; 61. Fixing component; 611. Fixing channel; 612. Oil passage; 62. Narrow section; 621. Negative pressure channel; 63. Secondary valve; 71. Air inlet pipe; 81. Cylinder; 82. Base plate; 821. First air inlet; 83. Top plate; 831. Second air inlet; 84. Fixed shaft; 85. Sliding block; 86. Soft pad.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the overall structure of a quantitative elliptical gear measuring gun proposed in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the internal structure of the embodiment; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle; Figure 5 This is a schematic diagram of the intake pipe structure according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the cylinder in an embodiment of this application; Figure 7 This is a schematic diagram of the internal structure of the cylinder according to an embodiment of this application.

[0027] refer to Figures 1 to 7This application provides a metering elliptical gear metering gun connected to a refueling pump. The metering elliptical gear metering gun may include a gun body 1 and a main valve opening and closing assembly. The gun body 1 has a main valve chamber 11, a connecting chamber 12, a metering chamber 13, and an oil outlet chamber 14 connected in sequence inside the gun body 1. The gun body 1 also has an installation chamber 15 and a diaphragm chamber 16 that are connected to each other. The main valve opening and closing assembly may include a main valve 22, a piston sleeve 23, a core rod 24, a locking mechanism 25, and a handle assembly 26. The diaphragm 21 is fixed in the diaphragm chamber 16 and divides the diaphragm chamber 16 into a first chamber and a second chamber. The first chamber is connected to the installation chamber 15. The main valve 22 is disposed in the main valve chamber 11 and is subjected to elastic force to block the connection between the main valve chamber 11 and the connecting chamber 12. The piston sleeve 23 is disposed in the installation chamber 15 and penetrates the connecting chamber 12. The piston sleeve 23 has the freedom to slide along its own axis to open the main valve 22. The core rod 24 passes through the inner circumference of the piston sleeve 23 and slides with the piston sleeve 23; the locking mechanism 25 is disposed in the second chamber and connected to the diaphragm 21, and the locking mechanism 25 has a degree of freedom to slide along the first direction, wherein when the locking mechanism 25 moves closer to or further away from the piston sleeve 23 along the first direction, the degree of freedom of relative sliding between the piston sleeve 23 and the core rod 24 is locked or released; the handle assembly 26 is disposed on the gun body 1 and connected to the core rod 24, and the handle assembly 26 provides a sliding driving force for the core rod 24; the metering gun can also include a target adsorption element 3, an electromagnet 4 and a metering component 5, the target adsorption element 3 is disposed in the second chamber and connected to the diaphragm 21; the electromagnet 4 is disposed in the second chamber and spaced apart from the target adsorption element 3 in the first direction; the metering component 5 is disposed at the metering channel 13, and the metering component 5 is used to measure the amount of oil flowing through the metering channel 13, wherein the metering component 5 is electrically connected to the electromagnet 4.

[0028] This application provides a quantitative elliptical gear metering gun. During quantitative refueling, a target refueling amount can be set. Then, pressing the handle assembly 26 pushes the core rod 24 to move from its original position. The core rod 24 drives the piston sleeve 23 to move, thereby opening the main valve 22 and starting refueling. The metering component 5 can measure the real-time refueling amount. When the real-time refueling amount equals the target refueling amount, the electromagnet 4 is energized. The electromagnet 4 attracts the object to be attracted 3, thereby deforming the diaphragm 21 and driving the locking mechanism 25 away from the piston sleeve 23. At this time, the piston sleeve 23 and the core rod 24 can slide relative to each other, so that the core rod 24 can no longer push the piston sleeve 23 to open the main valve 22. At this time, the main valve 22 is subjected to elastic force to push the piston sleeve 23 to slide, thereby closing the main valve 22 and stopping refueling. In this way, quantitative refueling can be achieved.

[0029] Among them, such as Figure 2 As shown, the first direction is the X direction, which is perpendicular to the axis of the core rod 24; the object to be attracted 3 can be an iron sheet or other materials that can be attracted by the electromagnet 4.

[0030] It should be noted that the specific configuration of the handle assembly 26, locking mechanism 25, core rod 24, piston sleeve 23, main valve 22, and diaphragm 21 is relatively conventional and will not be elaborated here. For example, the utility model patent with publication number CN214780737U can be used to realize the above-mentioned scheme of the handle assembly 26 driving the core rod 24 to move, the locking mechanism 25 moving away from the piston sleeve 23 to release the degree of freedom of relative sliding between the piston sleeve 23 and the core rod 24, and the scheme of the main valve 22 being closed by the spring force to connect the main valve cavity 11 and the connecting cavity 12 to the connecting area.

[0031] In addition, the metering component 5 can be an elliptical gear metering mechanism. The specific method of the elliptical gear metering mechanism to achieve metering is also quite conventional. For example, you can refer to the invention patent with publication number CN105384137A, which can use the Hall effect to measure the amount of oil flowing through the metering cavity 13.

[0032] The metering component 5 can be equipped with a display screen and related buttons for interactive operation. The display screen has a built-in controller, and the buttons can be pressed to set the target refueling amount in the controller. When the controller determines that the real-time refueling amount is equal to the target refueling amount, the controller can control the electromagnet 4 to be energized, thereby closing the main valve 22, and then control the electromagnet 4 to be de-energized.

[0033] It should be understood that after the quantitative refueling is completed, the handle assembly 26 is released and the electromagnet 4 is turned off. At this time, the core rod 24 returns to its original position, and the diaphragm 21 restores its deformation, thereby driving the locking mechanism 25 to approach the piston sleeve 23, so that the next refueling operation can be performed.

[0034] Furthermore, the quantitative elliptical gear metering gun may also include a first spring (not shown in the figure), one end of which is connected to the electromagnet 4 and the other end is connected to the adsorbed part 3. Thus, when the electromagnet 4 is closed, the first spring applies a pushing force to the diaphragm 21, thereby making the diaphragm 21 and the locking mechanism 25 more stable as they approach the piston sleeve 23.

[0035] refer to Figure 2 and Figure 4 In an exemplary embodiment, the quantitative elliptical gear metering gun may further include a fixing member 61, a constricted section 62, and a secondary valve 63. The fixing member 61 is disposed at one end of the oil outlet channel 14 near the metering channel 13, and has an oil passage 612 for oil flow. The constricted section 62 is disposed at one end of the fixing member 61 near the metering channel 13. The secondary valve 63 is connected to the fixing member 61 by a second spring, and the secondary valve 63 responds to the thrust of the second spring to abut and block the constricted section 62.

[0036] When the main valve 22 is opened, the oil first flows from the refueling pump into the main valve chamber 11, and then flows into the connecting chamber 12 and the metering chamber 13 in sequence, thus reaching the oil outlet chamber 14. At this time, the oil pressure will push the auxiliary valve 63 to move, so that the auxiliary valve 63 separates from the constriction section 62 and opens the auxiliary valve 63. The oil can then pass through the area of ​​the auxiliary valve 63 and flow through the oil passage 612 on the fixing member 61, thus entering the oil outlet chamber 14.

[0037] When the main valve 22 is closed, the second spring pushes the auxiliary valve 63 close to the constriction section 62, thereby closing the auxiliary valve 63, which blocks the connection area between the metering chamber 13 and the oil outlet chamber 14. At this time, the oil pressure flowing out of the metering chamber 13 is insufficient to push the auxiliary valve 63 to open, thus preventing oil leakage.

[0038] refer to Figures 2-4 In an exemplary embodiment, the fixing member 61 has a fixing channel 611, and the quantitative elliptical gear metering gun may also include an air inlet pipe 71, one end of which is connected to the fixing channel 611, and the other end is located at the end of the oil outlet channel 14 away from the metering channel 13; wherein, the gun body 1 has a connecting channel 17 to connect the fixing channel 611 and the second chamber; the constricted section 62 is provided with a negative pressure channel 621 that is connected to the connecting channel 17.

[0039] Specifically, the intake pipe 71 connects to the fixed channel 611, the negative pressure channel 621, the connecting channel 17, and the second chamber. The negative pressure channel 621 is located at the constriction section 62. According to the Venturi effect, the oil flow rate will increase at the constriction section 62, which will generate negative pressure in the negative pressure channel 621 located at the constriction section 62, thus drawing air from the second chamber and the intake pipe 71. When refueling, the end of the intake pipe 71 away from the fixed channel 611 is exposed. At this time, the negative pressure channel 621 only draws air from the intake pipe 71. When the tank is full, the oil in the tank exceeds the port of the intake pipe 71, thus blocking the intake pipe 71. At this time, the negative pressure channel 621 can draw air from the second chamber, which will deform the diaphragm 21 and drive the locking component away from the piston sleeve 23, thereby closing the main valve 22. This achieves self-sealing when the tank is full, that is, after the tank is full, the refueling nozzle will automatically shut off, preventing oil from overflowing and wasting.

[0040] Furthermore, such as Figure 4 As shown, in an exemplary embodiment, the angle between the axial direction of the negative pressure channel 621 and the axial direction of the constricted section 62 is an acute angle.

[0041] This prevents the oil from entering the negative pressure channel 621 when it flows through the constriction section 62.

[0042] refer to Figure 2In an exemplary embodiment, the end of the intake pipe 71 away from the fixed channel 611 passes through the side wall of the oil outlet channel 14; wherein, in the connection area between the intake pipe 71 and the oil outlet channel 14, the axial direction of the intake pipe 71 is perpendicular to the axial direction of the oil outlet channel 14; in the direction of gravity, the end of the intake pipe 71 away from the fixed channel 611 is located below the oil outlet channel 14.

[0043] like Figure 2 As shown, in the direction of gravity, the end of the air inlet pipe 71 away from the fixed channel 611 is located below the oil outlet channel 14, which facilitates the oil to pass over the port of the air inlet pipe 71. In addition, the port of the air inlet pipe 71 is located on the side wall of the oil outlet channel 14, and the axis of the air inlet pipe 71 is perpendicular to the axis of the oil outlet channel 14. Therefore, when the fuel nozzle is hung on the fuel dispenser, the oil on the fuel nozzle will not flow into the air inlet pipe 71 and affect the use of the air inlet pipe 71.

[0044] refer to Figure 5 In an exemplary embodiment, the end of the intake pipe 71 away from the fixed channel 611 is fixed to the port of the oil outlet channel 14; wherein, in the connection area between the intake pipe 71 and the oil outlet channel 14, the axial direction of the intake pipe 71 is parallel to the axial direction of the oil outlet channel 14; in the direction of gravity, the end of the intake pipe 71 away from the fixed channel 611 is located below the oil outlet channel 14.

[0045] The port of the intake pipe 71 can also be like... Figure 5 As shown, it is located at the port of the oil outlet 14, which makes it easier for the oil to overflow the port of the air inlet pipe 71, and thus makes it easier to control whether the oil is full.

[0046] refer to Figures 5-7 In an exemplary embodiment, the quantitative elliptical gear metering gun may further include a cylinder 81, a base plate 82, a top plate 83, a fixed shaft 84, and a sliding block 85. One end of the cylinder 81 is inserted into the air inlet pipe 71. The base plate 82 is fixed to the end of the cylinder 81 located inside the air inlet pipe 71, and a plurality of first air inlets 821 are arranged around the base plate 82. The top plate 83 is fixed to the end of the cylinder 81 located outside the air inlet pipe 71, and a plurality of second air inlets 831 are arranged around the top plate 83. The fixed shaft 84 is fixed between the base plate 82 and the top plate 83 and its axial direction coincides with the axial direction of the cylinder 81. The sliding block 85 is sleeved on the outer periphery of the fixed shaft 84 and slides with the fixed shaft 84. The sliding block 85 has a degree of freedom to slide along the axial direction of the fixed shaft 84. The orthographic projection of the sliding block 85 on the base plate 82 covers each of the first air inlets 821, and the orthographic projection of the sliding block 85 on the top plate 83 is located on the inner periphery of the plurality of second air inlets 831 arranged around the top plate 83.

[0047] Specifically, during refueling, in the direction of gravity, the bottom plate 82 is above the top plate 83, and the sliding block 85 slides along the fixed shaft 84 to fit against the top plate 83. At this time, both the first air inlet 821 and the second air inlet 831 are open, allowing gas to enter the air inlet pipe 71 normally. When the fuel is full, the fuel level exceeds the top plate 83, and the second air inlet 831 is closed, preventing gas from entering the air inlet pipe 71, thus achieving full-fuel self-sealing. When the fuel nozzle is hung on the fuel dispenser, the top plate 83 is above the bottom plate 82, and the sliding block 85 slides along the fixed shaft 84 to fit against the bottom plate 82. At this time, the sliding block 85 blocks the first air inlet 821, thus blocking the port of the air inlet pipe 71, effectively preventing oil contaminated at the outlet of the fuel outlet 14 from entering the air inlet pipe 71, and also preventing dust and impurities from entering the air inlet pipe 71, ensuring that the air inlet pipe 71 will not be blocked.

[0048] In a preferred embodiment, the cylinder 81 is threadedly connected to the air inlet pipe 71, which facilitates the disassembly of the cylinder 81 to clean, maintain, and replace structures such as the top plate 83 and the bottom plate 82.

[0049] Furthermore, the metering gun with elliptical gears can also include a soft pad 86, which is fixed to the side of the sliding block 85 facing the base plate 82. When the fuel gun is hung on the fuel dispenser, the sliding block 85 slides along the fixed shaft 84, thereby making the soft pad 86 fit against the base plate 82. At this time, the soft pad 86 blocks the first air inlet 821, and the blocking effect is better.

[0050] It should be understood that the orthographic projection of the sliding block 85 on the top plate 83 is located on the inner periphery of the plurality of second air inlets 831 arranged around it. Thus, when the sliding block 85 is in contact with the top plate 83, the sliding block 85 will not block the second air inlets 831. The orthographic projection of the sliding block 85 on the bottom plate 82 covers each of the first air inlets 821. Thus, when the sliding block 85 is in contact with the bottom plate 82, the sliding block 85 will block the first air inlets 821.

[0051] Among them, the soft pad 86 can be made of rubber.

[0052] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A quantitative elliptical gear measuring gun, characterized in that, Connected to a refueling pump, the metering elliptical gear metering gun includes a gun body (1) and a main valve opening and closing assembly. The gun body (1) has a main valve chamber (11), a connecting chamber (12), a metering chamber (13), and an oil outlet chamber (14) connected in sequence inside the gun body (1). The gun body (1) also has an installation chamber (15) and a diaphragm chamber (16) connected to each other inside the gun body (1). The main valve opening and closing assembly includes: A diaphragm (21) is fixed inside the diaphragm chamber (16) and divides the diaphragm chamber (16) into a first chamber and a second chamber, the first chamber being connected to the mounting chamber (15); The main valve (22) is disposed in the main valve cavity (11) and is subjected to elastic force to block the main valve cavity (11) from the connecting cavity (12). A piston sleeve (23) is disposed in the mounting chamber (15) and penetrates the connecting channel (12). The piston sleeve (23) has the freedom to slide along its own axis to push open the main valve (22). The core rod (24) passes through the inner circumference of the piston sleeve (23) and slides in cooperation with the piston sleeve (23); A locking mechanism (25) is disposed in the second chamber and connected to the diaphragm (21). The locking mechanism (25) has a degree of freedom to slide along a first direction, wherein when the locking mechanism (25) moves closer to or further away from the piston sleeve (23) along the first direction, the degree of freedom of the piston sleeve (23) to slide relative to the core rod (24) is locked or released. A handle assembly (26) is disposed on the gun body (1) and connected to the core rod (24), and the handle assembly (26) provides a sliding driving force for the core rod (24); The quantitative elliptical gear measuring gun also includes: The adsorption element (3) is placed in the second chamber and connected to the diaphragm (21); An electromagnet (4) is disposed in the second chamber and spaced apart from the adsorbed object (3) in the first direction; A metering component (5) is disposed at the metering cavity (13). The metering component (5) is used to measure the amount of oil flowing through the metering cavity (13). The metering component (5) is electrically connected to the electromagnet (4).

2. The quantitative elliptical gear measuring gun as described in claim 1, characterized in that, The quantitative elliptical gear measuring gun also includes: The first spring has one end connected to the electromagnet (4) and the other end connected to the adsorbed object (3).

3. The quantitative elliptical gear measuring gun as described in claim 1, characterized in that, The quantitative elliptical gear measuring gun also includes: A fixing member (61) is provided at one end of the oil outlet channel (14) near the metering channel (13), and the fixing member (61) has an oil passage (612) for oil flow. A constricted section (62) is provided at one end of the fixing member (61) near the metering channel (13); The secondary valve (63) is connected to the fixing member (61) via a second spring. The secondary valve (63) responds to the thrust of the second spring to abut and block the constricted section (62).

4. The quantitative elliptical gear measuring gun as described in claim 3, characterized in that, The fixing member (61) has a fixing channel (611), and the quantitative elliptical gear measuring gun further includes: The intake pipe (71) is connected at one end to the fixed channel (611) and at the other end of the oil outlet channel (14) away from the metering channel (13); The gun body (1) has a connecting channel (17) to connect the fixed channel (611) with the second chamber; The constricted section (62) is provided with a negative pressure channel (621) that communicates with the connecting channel (17).

5. The quantitative elliptical gear measuring gun as described in claim 4, characterized in that, The angle between the axial direction of the negative pressure channel (621) and the axial direction of the constricted section (62) is an acute angle.

6. The quantitative elliptical gear measuring gun as described in claim 4, characterized in that, The end of the air inlet pipe (71) away from the fixed channel (611) passes through the side wall of the oil outlet channel (14); In the connection area between the air intake pipe (71) and the oil outlet channel (14), the axial direction of the air intake pipe (71) is perpendicular to the axial direction of the oil outlet channel (14). In the direction of gravity, the end of the air intake pipe (71) away from the fixed channel (611) is located below the oil outlet channel (14).

7. The quantitative elliptical gear measuring gun as described in claim 4, characterized in that, The end of the air inlet pipe (71) away from the fixed channel (611) is fixed to the port of the oil outlet channel (14); In the connection area between the air intake pipe (71) and the oil outlet channel (14), the axial direction of the air intake pipe (71) is parallel to the axial direction of the oil outlet channel (14). In the direction of gravity, the end of the air intake pipe (71) away from the fixed channel (611) is located below the oil outlet channel (14).

8. The quantitative elliptical gear measuring gun as described in claim 7, characterized in that, The quantitative elliptical gear measuring gun also includes: One end of the cylinder (81) is inserted into the air inlet pipe (71); The base plate (82) is fixed to one end of the cylinder (81) located inside the air inlet pipe (71), and a plurality of first air inlets (821) are arranged around the base plate (82). The top plate (83) is fixed to one end of the cylinder (81) outside the air inlet pipe (71), and a plurality of second air inlets (831) are arranged around the top plate (83). A fixed shaft (84) is fixed between the bottom plate (82) and the top plate (83) and its axial direction coincides with the axial direction of the cylinder (81); A sliding block (85) is sleeved on the outer periphery of the fixed shaft (84) and slides in cooperation with the fixed shaft (84). The sliding block (85) has the freedom to slide along the axial direction of the fixed shaft (84). The orthographic projection of the sliding block (85) on the base plate (82) covers each of the first air inlets (821), and the orthographic projection of the sliding block (85) on the top plate (83) is located on the inner periphery of the plurality of second air inlets (831) arranged around it.

9. The quantitative elliptical gear measuring gun as described in claim 8, characterized in that, The cylinder (81) is threadedly connected to the air inlet pipe (71).

10. The quantitative elliptical gear measuring gun as described in claim 8, characterized in that, The quantitative elliptical gear measuring gun also includes: A soft pad (86) is fixed to the side of the sliding block (85) facing the base plate (82).

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