Fuel dispenser, fuel gun and switch assembly thereof

Abstract

The present application relates to the field of petrochemical technology, and provides a switch assembly of a refueling gun, a refueling gun, and a refueling machine. The switch assembly of the refueling gun is arranged on the refueling gun; the refueling gun has a gun body, a cavity is arranged inside the gun body, and a valve assembly is arranged in the cavity; the switch assembly of the refueling gun includes: a sleeve, the sleeve is connected with a trigger mechanism; a push rod, which is partially accommodated in the sleeve and contacts with the valve assembly, and the push rod tends to move in the direction of the sleeve under the action of the valve assembly to close the oil passage; a trigger and a transmission member, the trigger is connected to the sleeve through the transmission member, so as to actuate the trigger mechanism through the sleeve, so that it moves in the direction of the push rod, and actuates the valve assembly with the help of the push rod, thereby opening the oil passage; a reset spring is connected to the trigger. The implementation method of the present application reduces the manufacturing cost and assembly difficulty, and prolongs the service life.

Description

Technical Field

[0001] The present application relates to the field of petrochemical technology, and in particular to a fuel dispenser, a fueling gun of the fuel dispenser, and a switch assembly of the fueling gun. Background Art

[0002] A fuel dispenser is a device widely used in gas stations to refuel vehicles. A fuel dispenser is usually equipped with a fuel gun. The fuel gun is the output terminal of the fuel dispenser in the gas station, that is, the part that contacts the car's fuel tank.

[0003] With the maturity of oil and gas recovery technology, oil and gas recovery type refueling guns have been widely used in the market. However, as the terminal product of oil and gas recovery, oil and gas recovery self-sealing refueling guns generally have the disadvantages of complex assembly and processing technology, heavy weight, high flow resistance, and low reliability.

[0004] In order to solve the above shortcomings, a new internal structure of a fueling gun is provided in the Chinese invention patent application with application number 201310645845.1. However, its transmission process is still relatively complicated, and its service life and manufacturing cost are not satisfactory. Summary of the invention

[0005] In order to solve the above problem or at least partially solve the above technical problem, in one embodiment of the present application, a switch assembly of a fueling gun is provided, which is arranged on the fueling gun;

[0006] The refueling gun comprises a gun body, a cavity is arranged inside the gun body, and a valve assembly is arranged inside the cavity;

[0007] The switch assembly of the fuel gun includes:

[0008] A sleeve, wherein the sleeve is connected with a trigger mechanism;

[0009] A push rod, partially contained in the sleeve and in corresponding contact with the valve assembly, wherein the push rod tends to move toward the direction of the sleeve under the action of the valve assembly to close the oil passage;

[0010] A trigger and a transmission member, wherein the trigger is in transmission connection with the sleeve through the transmission member, so as to actuate the trigger mechanism through the sleeve to move toward the push rod, and actuate the valve assembly with the help of the push rod, so as to open the oil passage;

[0011] A return spring is connected with the trigger.

[0012] The embodiment of the present application further provides a valve assembly of a fueling gun, which is arranged on the fueling gun;

[0013] The refueling gun has a gun body, a cavity is arranged inside the gun body, and the cavity has an oil passage and an air passage;

[0014] The valve assembly of the refueling gun comprises:

[0015] Oil circuit valves, gas circuit valves and valve springs;

[0016] The switch assembly of the fueling gun has a push rod, which can be actuated and moved in the direction of the fuel line valve;

[0017] The oil circuit valve comprises: an oil circuit valve body, which is arranged on the inner wall of the oil circuit passage;

[0018] The oil circuit valve core is in contact with the valve spring and the push rod. The oil circuit valve core tends to move toward the direction of the push rod under the action of the valve spring, and abuts against the oil circuit valve body to close the oil circuit passage. The oil circuit valve core also leaves the oil circuit valve body under the actuation of the push rod to open the oil circuit passage.

[0019] Gas line valves include:

[0020] The gas path valve body is arranged on the inner wall of the oil path passage and connected to the gas path passage;

[0021] The gas circuit valve core is connected to the oil circuit valve core, and moves with the oil circuit valve core to close / open the gas circuit passage through the gas circuit valve body.

[0022] An embodiment of the present application further provides a refueling gun, wherein the refueling gun has the above-mentioned switch assembly and / or valve assembly.

[0023] An embodiment of the present application further provides a fuel dispenser, wherein the fuel dispenser has the above-mentioned fuel gun.

[0024] The switch assembly of the refueling gun in the embodiment of the present application connects the reset spring to the trigger transmission. Compared with the prior art, since the reset spring does not need to be arranged in the cavity inside the gun body, there is no need to arrange the spring in the cylindrical structure arranged inside the cavity. The depth of the cylindrical structure is reduced, which greatly reduces the difficulty of processing and installation.

[0025] In addition, since there is no need to set a spring in the cavity, the refueling gun provided by the embodiment of the present application also saves space in the cavity and reduces the complexity of the refueling gun.

[0026] On the valve assembly side, the valve assembly of the prior art is configured with two springs nested in each other, which undoubtedly increases the complexity of installation. When any one of the springs becomes fatigued, the fueling gun will fail, shortening the service life of the fueling gun.

[0027] Compared with the prior art, the embodiment of the present application drives the oil circuit valve and the gas circuit valve to each other through the connection relationship between the gas circuit valve core and the oil circuit valve core, which enables the gas circuit valve core to open and close the gas circuit valve along with the movement of the oil circuit valve core. Therefore, only one valve spring is needed to drive the opening and closing of the two valves, which significantly reduces the manufacturing cost and assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the prior art descriptions. Obviously, the drawings described below are only used to illustrate some implementation methods of the present application. For ordinary technicians in this field, without paying creative work, they can also obtain other technical features, connection relationships and even method steps not mentioned in the drawings based on these drawings.

[0029] Figure 1 It is a three-dimensional schematic diagram of the appearance of a fueling gun according to an embodiment of the present application;

[0030] Figure 2 is a cross-sectional perspective schematic diagram of a refueling gun according to an embodiment of the present application;

[0031] Figure 3 is a schematic cross-sectional view of the interior of the fueling gun when the trigger of the fueling gun according to the embodiment of the present application is not pressed;

[0032] Figure 4 is a schematic cross-sectional view of the interior of the fueling gun when the trigger of the fueling gun according to the embodiment of the present application is pressed;

[0033] Figure 5 It is a partial three-dimensional cross-sectional schematic diagram of the interior of the fueling gun at the valve assembly when the fueling gun according to the embodiment of the present application is in a ready state;

[0034] Figure 6 It is a partial three-dimensional cross-sectional schematic diagram of the interior of the fueling gun at the valve assembly when the trigger of the fueling gun of the embodiment of the present application is pressed;

[0035] Figure 7 is a perspective view of the appearance of a fuel gun according to an embodiment of the present application when the handle is separated;

[0036] Figure 8 It is a partial three-dimensional cross-sectional schematic diagram of the interior of the refueling gun at the sleeve and the ejector rod when the refueling gun according to the embodiment of the present application is in a ready state;

[0037] Fig. 9 It is a partial three-dimensional cross-sectional schematic diagram of the interior of the refueling gun at the sleeve and the ejector rod when the trigger of the refueling gun of the embodiment of the present application is pressed;

[0038] Fig.10It is a cross-sectional schematic diagram of the related components of the oil circuit valve according to the embodiment of the present application;

[0039] Fig.11 yes Fig.10 Enlarged schematic diagram of the oil circuit valve.

[0040] Description of Reference Numerals

[0041] 1. Gun body; 2. Cavity; 21. Oil channel; 22. Gas channel; 221. Guide cavity; 3. Valve assembly; 31. Valve spring; 32. Oil valve; 321. Oil valve body; 322. Oil valve core; 3221. First valve core; 3222. First support; 3223. First sealing part; 3224. Second valve core; 3225. Second support; 3226. Second sealing part; 3227. Sleeve groove; 32271. Inner groove; 32272. Notch; 33. Gas valve; 331. Gas valve body; 3311. Cavity Wall; 3312, supporting member; 3313, outer sealing hole; 3314, inner sealing hole; 332, air circuit valve core; 3321, closing head; 3322, head; 3323, neck; 3324, main body; 4, switch assembly; 41, sleeve; 411, solid part; 412, cylindrical part; 42, push rod; 421, step part; 43, trigger; 44, return spring; 45, transmission member; 451, fulcrum shaft; 452, drive shaft; 453, transmission rod; 5, trigger mechanism; 51, vacuum cap; 52, touch rod; 6, seal. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0043] The applicant found that in the Chinese invention patent application with application number 201310645845.1, the fuel gun disclosed includes:

[0044] The switch assembly, trigger mechanism and valve assembly of the fuel gun.

[0045] The refueling gun has a gun body, a cavity is arranged inside the gun body, and the valve assembly is arranged in the cavity, and the switch assembly of the refueling gun includes a push rod, which is formed in a cylindrical shape, and a switch spring and a switch rod are arranged in the cylinder. When the switch rod is pushed in the direction of the switch spring, the push rod can be pushed in the direction through the trigger mechanism to push open the valve assembly. Then, it can be reset with the help of the switch spring.

[0046] In this prior art, the switch rod and the switch spring are arranged inside the push rod, so that the push rod needs to form a very long cylindrical part, which makes the processing difficult, the scrap rate is high, the mechanical strength of the push rod is insufficient, and the service life is short. Moreover, the switch rod is limited within the cylindrical part of the push rod, and the diameter of the switch rod cannot be increased. In other words, the contact area between the switch rod and the external driving part (trigger, transmission member) is small. In order to maintain the service life, the structural strength of this connection part is also required to be higher, so the cost is high.

[0047] Moreover, in this prior art, the valve assembly is provided with two springs, which are used to resist the oil circuit valve and the gas circuit valve respectively. The structure is too complicated and the assembly difficulty is too high.

[0048] In view of this, the embodiments of the present application provide a refueling gun, a valve assembly of a refueling gun, and a switch assembly of a refueling gun. The following will be described in detail as follows:

[0049] Implementation Method 1

[0050] The first embodiment of the present application provides a refueling gun, a valve assembly 3 of the refueling gun, and a switch assembly 4 of the refueling gun.

[0051] We will start with the switch assembly 4 of the fueling gun and introduce them one by one. This switch assembly 4 is set on the fueling gun; see Figure 1 , Figure 2 and Figure 3 As shown, the refueling gun has a gun body 1, a cavity 2 is arranged inside the gun body 1, a valve assembly 3 is arranged inside the cavity 2; the cavity 2 also has an oil passage 21 and an air passage 22.

[0052] Alternatively, see Figure 3 As shown, the switch assembly 4 of the fuel gun includes:

[0053] A sleeve 41, on which a trigger mechanism 5 is connected;

[0054] The push rod 42 is partially accommodated in the sleeve 41 and contacts the valve assembly 3. Under the action of the valve assembly 3, the push rod 42 tends to move toward the direction of the sleeve 41 to close the oil passage 21.

[0055] A trigger 43 and a transmission member 45, wherein the trigger 43 is in transmission connection with the sleeve 41 through the transmission member 45, so as to actuate the trigger mechanism 5 through the sleeve 41 to move toward the push rod 42, and actuate the valve assembly 3 by means of the push rod 42, so as to open the oil passage 21;

[0056] The return spring 44 is connected to the trigger 43 .

[0057] Corresponding to the above switch assembly 4, the first embodiment of the present application further provides a valve assembly 3 of a fueling gun, which is arranged on the fueling gun;

[0058] Similarly, the refueling gun has a gun body 1, the interior of the gun body 1 is provided with a cavity 2, and the cavity 2 has an oil passage 21 and an air passage 22;

[0059] See also Figure 3 , Figure 5 , Figure 6 As shown, the valve assembly 3 of the fuel gun may include:

[0060] Oil circuit valve 32, gas circuit valve 33 and valve spring 31;

[0061] The switch assembly 4 of the fueling gun has a push rod 42, which can be actuated and move in the direction of the fuel line valve 32;

[0062] The oil circuit valve 32 comprises: an oil circuit valve body 321, which is arranged on the inner wall of the oil circuit channel 21;

[0063] The oil circuit valve core 322 is in contact with the valve spring 31 and the push rod 42. The oil circuit valve core 322 tends to move toward the direction of the push rod 42 under the action of the valve spring 31, and abuts against the oil circuit valve body 321 to close the oil circuit passage 21. The oil circuit valve core 322 also leaves the oil circuit valve body 321 under the action of the push rod 42 to open the oil circuit passage 21.

[0064] The gas circuit valve 33 includes:

[0065] The gas circuit valve body 331 is arranged on the inner wall of the oil circuit channel 21 and connected to the gas circuit channel 22;

[0066] The gas circuit valve core 332 is connected to the oil circuit valve core 322 , and moves with the oil circuit valve core 322 to close / open the gas circuit passage 22 through the gas circuit valve body 331 .

[0067] The switch assembly 4 and valve assembly 3 provided in the embodiment of the present application are independent of each other. In the actual implementation process, the switch assembly 4 of the embodiment of the present application can be combined with the valve assembly in the prior art, or the valve assembly 3 of the embodiment of the present application can be combined with the switch assembly in the prior art to obtain the corresponding implementation effect. Under this premise, the first embodiment of the present application also provides a refueling gun, which can use the aforementioned switch assembly 4 and valve assembly 3 at the same time. And, the first embodiment of the present application also provides a refueling machine using the above-mentioned refueling gun.

[0068] That is to say, the embodiment of the present application further provides a refueling gun, including:

[0069] The gun body 1 has a cavity 2 disposed inside the gun body 1, and the cavity 2 includes an oil passage 21 and a gas passage 22;

[0070] The switch assembly 4 and the valve assembly 3, wherein the switch assembly 4 comprises:

[0071] A sleeve 41, on which a trigger mechanism 5 is connected;

[0072] The push rod 42 is partially accommodated in the sleeve 41 and contacts the valve assembly 3. Under the action of the valve assembly 3, the push rod 42 tends to move toward the direction of the sleeve 41 to close the oil passage 21.

[0073] A trigger 43 and a transmission member 45, wherein the trigger 43 is in transmission connection with the sleeve 41 through the transmission member 45, so as to actuate the trigger mechanism 5 through the sleeve 41 to move toward the push rod 42, and actuate the valve assembly 3 by means of the push rod 42, so as to open the oil passage 21;

[0074] The return spring 44 is connected to the trigger 43 .

[0075] Valve assembly 3, comprising:

[0076] Oil circuit valve 32, gas circuit valve 33 and valve spring 31;

[0077] The oil circuit valve 32 comprises: an oil circuit valve body 321, which is arranged on the inner wall of the oil circuit channel 21;

[0078] The oil circuit valve core 322 is in contact with the valve spring 31 and the push rod 42. The oil circuit valve core 322 tends to move toward the direction of the push rod 42 under the action of the valve spring 31, and abuts against the oil circuit valve body 321 to close the oil circuit passage 21. The oil circuit valve core 322 also leaves the oil circuit valve body 321 under the action of the push rod 42 to open the oil circuit passage 21.

[0079] The gas circuit valve 33 includes:

[0080] The gas circuit valve body 331 is arranged on the inner wall of the oil circuit channel 21 and connected to the gas circuit channel 22;

[0081] The gas circuit valve core 332 is connected to the oil circuit valve core 322 , and moves with the oil circuit valve core 322 to close / open the gas circuit passage 22 through the gas circuit valve body 331 .

[0082] Further, optionally, the inner wall of the oil passage 21 protrudes to form an annular oil valve body 321. Specifically, the inner wall portion of the cavity 2 of the gun body 1 that forms the oil passage 21 protrudes toward the oil valve 32 to form an annular oil valve body 321.

[0083] In the embodiment of the present application, by setting the oil circuit valve body 321 on the inner wall of the oil circuit channel 21, the sealing work between the oil circuit valve body 321 and the oil circuit channel 21 is omitted, and the structure of the oil circuit valve body 321 is simplified. The annular oil circuit valve body 321 integrally formed with the gun body 1 can achieve a good isolation effect on the oil circuit channel 21.

[0084] The structures of the gun body 1 , the cavity 2 , and the trigger mechanism 5 may be basically consistent with those in the prior art.

[0085] Specifically, a typical trigger mechanism 5 can be as follows: Figure 3 As shown, the vacuum cap 51 and the trigger rod 52 extending from the vacuum cap 51 are included.

[0086] The sleeve 41 may be formed with a trigger rod receiving groove, through which the movement of the trigger rod 52 is triggered. Of course, a protruding structure may also be provided on the surface of the sleeve 41 to promote the movement of the trigger rod 52 .

[0087] In the pre-fire state, the oil pressure in the fuel gun triggers the vacuum cap 51, which can make the trigger rod 52 move toward the switch assembly 4, especially toward the direction where the sleeve 41 is located, so that the trigger rod 52 is connected to the receiving groove of the sleeve 41. In this state, the trigger rod 52 can abut against the push rod 42 in the sleeve 41. Specifically, the trigger rod 52 abuts against the end surface of the push rod 42 in the sleeve 41.

[0088] On the contrary, in the closed state, when the oil pressure decreases, the vacuum cap 51 will move away from the sleeve 41 under the action of the spring restoring force in the vacuum cap; or when the oil is full, under the action of the negative pressure generated above the vacuum cap 51, the vacuum cap 51 will move in the direction away from the sleeve 41.

[0089] The trigger rod 52 moves with the vacuum cap 51 and leaves the trigger rod receiving groove of the sleeve 41. Driven by the restoring force of the valve spring 31, the valve assembly 3 will be closed and the push rod 42 will be pushed back to its original position.

[0090] Of course, the trigger mechanism 5 can also be based on other forms of the prior art to trigger the transmission relationship between the sleeve 41 and the push rod 42.

[0091] Next, we will explain the aforementioned action coordination relationship in detail in combination with application scenarios:

[0092] 1. See Figure 3 As shown, in the refueling gun, the valve spring 31 remains in a compressed state, and under the action of the elastic force of the valve spring 31, the oil circuit valve 32 closes the oil circuit of the cavity 2. The gas circuit valve 33 is in a closed state synchronously with the oil circuit valve 32. At this time, the refueling gun is in a closed state. The inside of the refueling gun is in an initial state. In other words, under the action of the valve spring 31, the oil circuit valve 32 closes the oil circuit of the cavity 2, and the gas circuit valve 33 is in a closed state synchronously with the oil circuit valve 32. Since the system is unloaded, the vacuum cap 51 is not subjected to pressure, and therefore the trigger rod 52 is not connected to the sleeve 41. Even if the user presses the trigger 43 by mistake, there is no linkage relationship between the sleeve 41 and the push rod 42, and the oil circuit will not be connected.

[0093] 2. The refueling pump starts working, and the oil is pumped into the vacuum cap 51. After the vacuum cap 51 is subjected to pressure, the trigger rod 52 is inserted into the sleeve 41 and abuts against the ejector rod 42. The refueling gun is in a pre-fire state.

[0094] 3. See Figure 4 As shown, the user presses the trigger 43. The trigger 43 drives the sleeve 41 to move in the direction of the push rod 42 through the transmission component 45. The wall or other parts of the sleeve 41 actuate the trigger mechanism 5, so that the trigger mechanism 5 actuates the push rod 42 to move. The movement of the push rod 42 in turn drives the opening of the oil circuit valve 32. Since the air circuit valve 33 is transmission-connected to the oil circuit valve 32, the air circuit valve 33 is also opened. At this time, the oil circuit channel 21 and the air circuit channel 22 of the refueling gun cavity 2 have been opened, and the oil flows from the oil circuit channel 21 to the fuel tank, and the gas in the fuel tank flows in the opposite direction to the gas storage device in the direction of the refueling machine through the air circuit channel 22. Afterwards, according to the refueling process, there may be two branches:

[0095] 4. When the refueling volume reaches the refueling amount, the oil pump is turned off, the vacuum cap 51 loses pressure, and the trigger rod 52 leaves the sleeve 41. Since there is no longer a thrust from the sleeve 41, the push rod 42 and the oil circuit valve 32 return to their positions under the actuation of the valve spring 31, and drive the gas circuit valve 33 to return to their positions synchronously, so that the oil channel 21 and the gas channel 22 are closed. The trigger 43 returns to its position under the actuation of the return spring 44, so that the sleeve 41 is driven by the transmission component 45 to return to its position. The refueling gun will automatically return to the initial state.

[0096] 5. Or, when the oil tank is filled, the oil tank liquid level rises and submerges the oil outlet of the refueling gun. The auxiliary valve generates negative pressure due to the Venturi effect, and the negative pressure is transmitted to the vacuum cap 51, so that the elastic diaphragm moves upward under the action of the negative pressure, thereby driving the trigger rod 52 to move upward and leave the sleeve 41. Since there is no longer a thrust from the sleeve 41, under the actuation of the valve spring 31, the push rod 42 and the oil circuit valve 32 return to their positions, and drive the gas circuit valve 33 to return to their positions synchronously, so that the oil circuit channel 21 and the gas circuit channel 22 are closed. The trigger 43 returns to its position under the actuation of the reset spring 44, so that the sleeve 41 is driven by the transmission member 45 to return to its position. The refueling gun will automatically return to its initial state.

[0097] The embodiment of the present application connects the reset spring 44 with the trigger 43 in a transmission manner. Compared with the prior art, since the reset spring 44 does not need to be arranged in the cavity 2 inside the gun body 1, there is no need to arrange the spring in the cylindrical structure arranged inside the cavity 2. The depth of the cylindrical structure is reduced, which greatly reduces the difficulty of processing and installation.

[0098] In addition, since there is no need to set a spring in the cavity 2, the refueling gun provided by the embodiment of the present application also saves space in the cavity 2 and reduces the complexity of the refueling gun.

[0099] On the valve assembly 3 side, the valve assembly of the prior art is configured as two springs nested in each other, which undoubtedly increases the complexity of installation. After any one of the springs becomes fatigued, the fueling gun will fail, shortening the service life of the fueling gun.

[0100] Compared with the prior art, the embodiment of the present application drives the oil circuit valve 32 and the gas circuit valve 33 to each other through the connection between the gas circuit valve core 332 and the oil circuit valve core 322, which enables the gas circuit valve core 332 to open and close the gas circuit valve 33 along with the movement of the oil circuit valve core 322. Therefore, only one valve spring 31 is needed to drive the opening and closing of the two-way valve, which significantly reduces the manufacturing cost and assembly difficulty.

[0101] Implementation Method 2

[0102] The second embodiment of the present application is a further improvement based on the first embodiment, which is mainly aimed at improving the valve assembly 3. Specifically, in the second embodiment of the present application, see Figure 5 , Figure 6 , Fig.10 As shown, a sleeve groove 3227 is provided on the oil circuit valve core 322, and the gas circuit valve core 332 is sleeved on the oil circuit valve core 322 through the sleeve groove 3227. The gas circuit valve core 332 can freely rotate relative to the oil circuit valve core 322 with its own axis as the rotation axis.

[0103] When the gas circuit valve core 332 can rotate freely with its own axis as the rotation axis relative to the oil circuit valve core 322, the wear of the gas circuit valve core 332 in all directions in contact with the oil circuit valve core 322 can be effectively balanced. Due to the interference contact caused by the restoring force of the valve spring 31, the gas circuit valve core 332 can still provide a sufficiently balanced urging force after being worn in all directions, thereby significantly extending the service life of the fueling gun.

[0104] Further, see Fig.10 As shown, the sleeve groove 3227 includes an inner groove 32271 and a notch 32272 , and the inner diameter of the notch 32272 is smaller than the inner diameter of the inner groove 32271 ;

[0105] At the same time, the air circuit valve core 332 has a main body 3324 located outside the sleeve groove 3227, a head 3322 extending into the inner groove 32271, and a neck 3323 connecting the main body 3324 and the head 3322, and the outer diameter of the head 3322 is larger than the inner diameter of the groove 32272.

[0106] When the outer diameter of the head 3322 is larger than the inner diameter of the notch 32272 , the notch 32272 can be used to limit the head 3322 , thereby eliminating the need for an additional limiting structure and reducing the molding process cost.

[0107] In order to place the head 3322 into the inner groove 32271, an opening can be provided at the side of the sleeve groove 3227, or the oil circuit valve core 322 can be made into two parts that can be disassembled and assembled along the radial direction. When the solution of providing an opening at the side of the sleeve groove 3227 is adopted, the notch 32272 and the inner groove 32271 of the sleeve groove 3227 will inevitably cause wear on a specific side of the gas circuit valve core 332. At this time, the gas circuit valve core 332 that can freely rotate relative to the oil circuit valve core 322 with its own axis as the rotation axis can better balance the wear in all directions, thereby extending the service life.

[0108] It is worth mentioning that see Fig.10 , Fig.11 As shown, the length d1 of the head 3322 can be set to be smaller than the depth d2 of the inner groove 32271 , and the length d3 of the neck 3323 can be set to be larger than the depth d4 of the notch 32272 .

[0109] Such an arrangement can provide more room for the movement of the gas circuit valve core 332, thereby balancing the pressure of each part of the inner cavity 2 of the fueling gun and preventing problems such as backflow and cross-flow.

[0110] In addition, an external thread section may be provided at the portion of the neck 3323 near the head 3322, and an internal thread may be provided correspondingly on the notch 32272. In this case, the inner diameter of the notch 32272 does not need to be smaller than the inner diameter of the inner groove 32271, and the outer diameter of the head 3322 does not need to be larger than the inner diameter of the notch 32272.

[0111] With the help of this threaded structure, the connection between the two can be achieved without specially setting the shape structure of the sleeve groove 3227 and the head and neck of the air circuit valve core 332. Furthermore, when the length of the external thread section is shorter than the length d1 of the head 3322, the air circuit channel 22 can also have sufficient space for movement, thereby extending the service life of the refueling gun.

[0112] In addition to the above improvements, a feasible specific structure is also disclosed in the embodiment of the present application for the oil circuit valve 32. Figure 5 , Fig.10 As shown, optionally, a step portion 421 is provided on the outer side wall of the top rod 42;

[0113] The oil circuit valve core 322 includes:

[0114] The first valve core 3221 includes a first support portion 3222 corresponding to the step portion 421 and a first sealing portion 3223 corresponding to the oil circuit valve body 321; the first support portion 3222 and the first sealing portion 3223 are connected to each other, and a through hole is provided on the first support portion 3222;

[0115] The second valve core 3224 includes a second support portion 3225 correspondingly contacting the end of the push rod 42, and a second sealing portion 3226 correspondingly contacting the first sealing portion 3223; the second support portion 3225 and the second sealing portion 3226 are connected to each other or formed in one piece, correspondingly closing the through hole provided on the first support portion 3222. The valve spring 31 abuts against the second valve core 3224, specifically, the valve spring 31 can abut against the second sealing portion 3226 of the second valve core 3224.

[0116] There is a first distance d5 between the surface of the step portion 421 that contacts the first support portion 3222 and the surface of the end of the push rod 42 that contacts the second support portion 3225;

[0117] A second distance d6 exists between the surface of the first supporting portion 3222 that contacts the step portion 421 and the surface of the first sealing portion 3223 that contacts the second sealing portion 3226 .

[0118] The first distance d5 is greater than the second distance d6.

[0119] When the first distance d5 is greater than the second distance d6, it can be ensured that when the push rod 42 moves toward the direction of the oil circuit valve core 322, it will first push open the second valve core 3224, so that the second valve core 3224 is separated from the first valve core 3221, and then push open the first valve core 3221, so that the first valve core 3221 is separated from the oil circuit valve body 321.

[0120] When the second valve core 3224 is pushed open first, the smaller opening opened is convenient for balancing the pressure on both sides of the oil circuit valve body 321, reducing the resistance encountered by the oil circuit valve core 322, and making the oil in the refueling gun flow out more smoothly.

[0121] It is worth mentioning that when the oil circuit valve core 322 is separated into a first valve core 3221 and a second valve core 3224, the aforementioned sleeve groove 3227 can be set on the second valve core 3224, specifically, can be set in a sleeve form on the second sealing part 3226 to simplify the structure.

[0122] Moreover, when the second valve core 3224 moves under the action of the push rod 42, since the first distance d5 is greater than the second distance d6, the gas circuit valve core 332 will move synchronously with the second valve core 3224, that is, it moves before the movement of the first valve core 3221. This allows the gas circuit channel 22 to open before the oil circuit channel 21, so that the oil and gas in the oil tank can be extracted through the gas circuit channel 22 in advance, further preventing the oil and gas from escaping.

[0123] Furthermore, the gas circuit valve core 332 can be sleeved on the second valve core 3224 and can freely rotate with its own axis as the rotation axis relative to the second valve core 3224. When the gas circuit valve core 332 can rotate freely, the wear of the gas circuit valve core 332 in all directions can be effectively balanced, thereby extending the service life of the fueling gun.

[0124] Also, it is worth mentioning that the sealing surface on the second sealing portion 3226 that corresponds to the first sealing portion 3223 can also be provided with at least two planes with a height difference to form a step-like shape, which can reduce the oil seal pressure and reduce the force required to open the oil circuit valve 32.

[0125] Alternatively, see Figure 5 , Figure 6 As shown, the gas path valve body 331 separates the guide cavity 221 of the gas path channel 22 from the oil path channel 21. Specifically, the gas path valve body 331 can be fixedly arranged on the inner wall of the oil path channel 21, so that the guide cavity 221 occupies a part of the middle part of the axis of the oil path channel 21. By opening and closing this guide cavity 221, the opening and closing of the gas path channel 22 can be realized.

[0126] Further optionally, one end of the valve spring 31 abuts against the gas circuit valve body 331 , and the other end abuts against the oil circuit valve core 322 ; the gas circuit valve core 332 passes through the hollow area of ​​the valve spring 31 and is connected to the oil circuit valve core 322 .

[0127] The air path valve core 332 is inserted into the hollow area of ​​the valve spring 31, so as to better save the internal space of the cavity 2 and simplify the structure.

[0128] Further optionally, the gas circuit valve body 331 comprises: a cavity wall 3311 forming the guide cavity 221, a support member 3312 connecting the cavity wall 3311 and the inner wall of the gun body 1, and a gap is reserved on the support member 3312 for the oil supply passage 21 to be unobstructed;

[0129] The cavity wall 3311 is provided with an outer sealing hole 3313 for separating the oil passage 21 and the guide cavity 221 , and an inner sealing hole 3314 provided in the guide cavity 221 ;

[0130] The gas circuit valve core 332 has a closing head 3321 , which passes through the outer sealing hole 3313 and forms a seal with the inner sealing hole 3314 .

[0131] Among them, multiple outer sealing holes 3313 can be arranged at intervals to achieve a better sealing effect.

[0132] When the gas circuit valve core 332 is connected to the guide cavity 221 through the outer sealing hole 3313, the gas circuit valve core 332 can be coaxially arranged with the push rod 42, thereby simplifying the structure. At this time, the outlet of the gas circuit channel 22 and the inlet of the oil circuit channel 21 can also be coaxially arranged, and the refueling gun can be matched with the oil and gas recovery refueling pipeline of the existing technology, thereby reducing the equipment maintenance and upgrade costs.

[0133] Next, the above structure will be further explained in detail in combination with the application scenario:

[0134] 1. See Figure 3 , Figure 5 As shown, in the refueling gun, one side of the valve spring 31 abuts against the second valve core 3224, and the other side abuts against the gas circuit valve body 331 of the gas circuit valve 33. Due to the abutting effect of the valve spring 31, the first valve core 3221, the second valve core 3224 and the oil circuit valve body 321 are in a closed state. Under the restriction of the second valve core 3224, the gas circuit valve core 332 is also in a sealed state with the inner sealing hole 3314. In other words, the oil circuit channel 21 and the gas circuit channel 22 are both in a sealed state. Moreover, since the system is unloaded, the vacuum cap 51 is not subjected to pressure, so the trigger rod 52 is not connected to the sleeve 41. Even if the user presses the trigger 43 by mistake, there is no linkage relationship between the sleeve 41 and the push rod 42, and the oil circuit will not be connected.

[0135] 2. The refueling pump starts working and the oil is pumped into the vacuum cap. After the vacuum cap 51 is under pressure, the trigger rod 52 is inserted into the sleeve 41 and abuts against the ejector rod 42. The refueling gun is in the pre-fire state.

[0136] 3. See Figure 4 , Figure 6 As shown, the user presses the trigger 43. The trigger 43 drives the sleeve 41 to move toward the direction of the push rod 42 through the transmission member 45. The wall or other parts of the sleeve 41 actuate the trigger mechanism 5, so that the trigger mechanism 5 actuates the push rod 42 to move.

[0137] During this process, the movement of the push rod 42 first actuates the second valve core 3224 to open the oil passage 21. At the same time, the movement of the push rod 42 synchronously actuates the gas passage valve core 332 linked thereto, causing the closing head 3321 and the inner sealing hole 3314 to be misaligned. On this basis, the gas passage 22 will be connected with the opening of the guide cavity 221. Afterwards, the movement of the push rod 42 further actuates the movement of the first valve core 3221 with the aid of the step portion 421, so that the oil passage 21 is fully opened.

[0138] After the oil passage 21 and the gas passage 22 of the cavity 2 of the refueling gun have been opened, the oil flows from the oil passage 21 to the fuel tank, and the gas in the fuel tank flows in the opposite direction to the gas storage device in the direction of the refueling machine through the gas passage 22. Afterwards, there may be two branches according to the refueling process:

[0139] 4. When the refueling volume reaches the refueling amount, the oil pump is turned off, the vacuum cap 51 loses pressure, and the trigger rod 52 leaves the sleeve 41. Since it is no longer subject to the thrust from the sleeve 41, the oil circuit valve core 322 returns to its position and blocks the oil circuit passage 21 under the actuation of the valve spring 31. Driven by the second valve core 3224, the gas circuit valve core 332 also returns to its position synchronously and blocks the guide cavity 221, so that the gas circuit passage 22 is also closed.

[0140] The trigger 43 returns to its original position under the urging of the return spring 44, so that the sleeve 41 is driven to return to its original position by the transmission member 45. The refueling gun will automatically return to the initial state.

[0141] 5. Alternatively, when the oil tank is filled, the oil level in the oil tank rises and submerges the oil outlet of the fuel gun. The auxiliary valve generates negative pressure due to the Venturi effect, and the negative pressure is transmitted to the vacuum cap 51, so that the elastic diaphragm moves upward under the action of the negative pressure, thereby driving the trigger rod 52 to move upward and leave the sleeve 41. Since it is no longer subject to the thrust from the sleeve 41, under the actuation of the valve spring 31, the oil circuit valve core 322 returns to its position and blocks the oil circuit channel 21. Driven by the second valve core 3224, the gas circuit valve core 332 also returns to its position synchronously and blocks the guide cavity 221, so that the gas circuit channel 22 is also closed.

[0142] The trigger 43 returns to its original position under the urging of the return spring 44, so that the sleeve 41 is driven to return to its original position by the transmission member 45. The refueling gun will automatically return to the initial state.

[0143] Implementation Method 3

[0144] The third embodiment of the present application is a further improvement based on the first or second embodiment, which is mainly aimed at improving the switch assembly 4. Specifically, in the third embodiment of the present application, see Figure 7 , Figure 8 and Fig. 9 As shown, the transmission member 45 in the switch assembly 4 includes:

[0145] A driving shaft 452 is disposed on the sleeve 41;

[0146] A fulcrum shaft 451 is provided on the gun body 1;

[0147] The transmission rod 453 is respectively connected to the trigger 43, the driving shaft 452 and the fulcrum shaft 451;

[0148] When the trigger 43 is pressed, the transmission rod 453 is driven to make a circular motion with the fulcrum shaft 451 as the center, and at the same time, the driving shaft 452 is actuated and the sleeve 41 is driven to make a linear motion.

[0149] Optionally, the drive shaft 452 passes through the sleeve 41 .

[0150] The transmission rod 453 can be used to convert the arc motion of the trigger 43 into the linear motion of the sleeve 41. When the drive shaft 452 penetrates the sleeve 41, the forces on both sides of the sleeve 41 can be balanced.

[0151] Optionally, the transmission rod 453 is connected to the first side of the trigger 43;

[0152] One end of the return spring 44 is connected to the gun body 1, and the other end is also connected to the first side of the trigger 43. When the two are connected to the same side, the transmission rod 453 arranged outside can be used to protect and cover the return spring 44.

[0153] Optionally, the side of the sleeve 41 close to the push rod 42 has a cylindrical portion 412, and the side away from the push rod 42 has a solid portion 411, and the drive shaft 452 passes through the solid portion 411. Passing the drive shaft 452 through the solid portion 411 can make the driving action of the drive shaft 452 more stable. Optionally, a seal 6 can be provided in the cavity 2, and the push rod 42 is passed through the seal 6 to be inserted into the cylindrical portion 412 of the sleeve 41. The provided seal 6 can prevent oil from entering the position of the sleeve 41, thereby preventing oil from leaking from the drive shaft 452. Further, the drive shaft 452 can pass through the sleeve 41 in the radial direction of the sleeve 41. When passing through in the radial direction, the forces on both sides of the sleeve 41 will be more balanced.

[0154] Further optionally, the depth of the cylindrical portion 412 is less than or equal to 5 cm.

[0155] In the prior art, cylindrical objects are often processed by lathes. The yield rate of shallow-depth workpieces is higher, but deep-depth workpieces are prone to cracking and deformation, and the internal stress of the finished product is large, and the quality is worse.

[0156] In the embodiment of the present application, since the push rod 42 is made into a solid piece and the return spring 44 is arranged outside the gun body 1, the depth of the sleeve 41 can be reduced to less than 5 cm, and even only the depth for the trigger rod 52 to be inserted can be retained, that is, about 2 mm to 3 mm, which greatly reduces the difficulty of processing. The improvement of the yield rate reduces the processing cost, improves the quality of the workpiece, and prolongs the service life of the fueling gun.

[0157] In addition, optionally, the push rod 42 can freely rotate relative to the sleeve 41 with its own axis as the rotation axis.

[0158] In the prior art, the components that push the valve assembly are usually unable to rotate freely. Since each time the drive shaft is involved, friction will be generated on this component, that is, the tail end of the push rod 42 in the embodiment of the present application. Under long-term friction, one side of the tail end of the push rod will collapse, thereby causing the fuel gun to fail.

[0159] Compared with the prior art, the push rod 42 in the embodiment of the present application can rotate freely relative to the sleeve 41 with its own axis as the rotation axis. When the drive shaft 452 intervenes, the push rod 42 in the embodiment of the present application will spontaneously rotate at a small angle under the influence of the drive shaft 452, which makes the wear of the rear end of the push rod 42 in all directions averaged. At the same time, due to the interference effect of the valve spring 31, the push rod 42 can still complete the action of pushing open the valve assembly 3 even if it is slightly worn. This greatly extends the service life of the fuel gun.

[0160] Next, the above structure will be further explained in detail in combination with the application scenario:

[0161] 1. See Figure 3 , Figure 5 , Figure 8 As shown, in the refueling gun, one side of the valve spring 31 abuts against the second valve core 3224, and the other side abuts against the gas circuit valve body 331 of the gas circuit valve 33. Due to the abutment of the valve spring 31, the first valve core 3221, the second valve core 3224 and the oil circuit valve body 321 are in a closed state. Under the restriction of the second valve core 3224, the gas circuit valve core 332 is also in a sealed state with the inner sealing hole 3314. In other words, the oil circuit channel 21 and the gas circuit channel 22 are both in a sealed state.

[0162] At the same time, since the system is unloaded, the vacuum cap 51 is not subjected to pressure, so the trigger rod 52 is not connected to the sleeve 41, and there is no linkage relationship between the sleeve 41 and the push rod 42. Even if the user presses the trigger 43 by mistake, the trigger 43 uses the fulcrum shaft 451 as a fulcrum, and in the process of driving the sleeve 41 to move through the transmission rod 453 and the drive shaft 452, it only actuates the trigger rod 52 to move unloaded, or even does not contact the trigger rod 52.

[0163] 2. The refueling pump starts working, and the oil is pumped into the vacuum cap 51. After the vacuum cap 51 is under pressure, the trigger rod 52 is connected to the sleeve 41. A linkage relationship is formed between the sleeve 41 wall, the trigger rod 52 and the ejector rod 42, and the refueling gun is in a pre-fire state.

[0164] 3. See Figure 4 , Figure 6 , Figure 7 , Fig. 9 As shown, the user presses the trigger 43. The movement of the trigger 43 pulls or compresses the reset spring 44, causing the spring to store energy. At the same time, the trigger 43 drives the transmission rod 453 to make a small distance circular motion along the fulcrum axis 451. Under the special shape of the transmission rod 453, the drive shaft 452 connected to the transmission rod 453 will make a linear motion, and this motion belongs to a typical connecting rod transmission mode. By converting the circular motion into a linear motion, relying on the principle of the lever, the user does not need a lot of force to actuate the sleeve 41 to move in the direction of the push rod 42. At this time, the wall of the sleeve 41 actuates the trigger rod, so that the trigger rod actuates the push rod 42 to move.

[0165] During this process, the movement of the push rod 42 first actuates the second valve core 3224 to open the oil passage 21. At the same time, the movement of the push rod 42 synchronously actuates the gas passage valve core 332 linked thereto, causing the closing head 3321 and the inner sealing hole 3314 to be misaligned. On this basis, the gas passage 22 will be connected with the opening of the guide cavity 221. Afterwards, the movement of the push rod 42 further actuates the movement of the first valve core 3221 with the aid of the step portion 421, so that the oil passage 21 is fully opened.

[0166] After the oil passage 21 and the gas passage 22 of the cavity 2 of the refueling gun have been opened, the oil flows from the oil passage 21 to the fuel tank, and the gas in the fuel tank flows in the opposite direction to the gas storage device in the direction of the refueling machine through the gas passage 22. Afterwards, there may be two branches according to the refueling process:

[0167] 4. When the refueling volume reaches the refueling amount, the oil pump is turned off, the vacuum cap 51 loses pressure, and the trigger rod 52 leaves the sleeve 41. Since it is no longer subject to the thrust from the sleeve 41, the oil circuit valve core 322 returns to its position and blocks the oil circuit passage 21 under the actuation of the valve spring 31. Driven by the second valve core 3224, the gas circuit valve core 332 also returns to its position synchronously and blocks the guide cavity 221, so that the gas circuit passage 22 is also closed.

[0168] The trigger 43 returns to its original position under the urging of the return spring 44, so that the sleeve 41 is driven to return to its original position by the transmission member 45. The refueling gun will automatically return to the initial state.

[0169] 5. Alternatively, when the oil tank is filled, the oil level in the oil tank rises and submerges the oil outlet of the fuel gun. The auxiliary valve generates negative pressure due to the Venturi effect, and the negative pressure is transmitted to the vacuum cap 51, so that the elastic diaphragm moves upward under the action of the negative pressure, thereby driving the trigger rod 52 to move upward and leave the sleeve 41. Since it is no longer subject to the thrust from the sleeve 41, under the actuation of the valve spring 31, the oil circuit valve core 322 returns to its position and blocks the oil circuit channel 21. Driven by the second valve core 3224, the gas circuit valve core 332 also returns to its position synchronously and blocks the guide cavity 221, so that the gas circuit channel 22 is also closed.

[0170] The trigger 43 returns to its original position under the urging of the return spring 44, so that the sleeve 41 is driven to return to its original position by the transmission member 45. The refueling gun will automatically return to the initial state.

[0171] Obviously, the embodiments of the present application provide more than just the above-mentioned components. A fueling gun including the components, and a fueling machine including the components, should all be included in the protection scope of the present application.

[0172] It should be understood that the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0173] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0174] It should be understood that although the terms first, second, third, etc. may be used to describe certain components in the embodiments of the present application, these components should not be limited to these terms. These terms are only used to distinguish the components from each other. For example, without departing from the scope of the embodiments of the present application, the first so-and-so component may also be referred to as the second so-and-so component, and similarly, the second so-and-so component may also be referred to as the first so-and-so component.

[0175] Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to monitoring." Similarly, depending on the context, the phrases "if it is determined" or "if monitoring (stated condition or event)" may be interpreted as "when determining" or "in response to determining" or "when monitoring (stated condition or event)" or "in response to monitoring (stated condition or event)."

[0176] In the embodiments of the present application, "substantially equal to", "substantially perpendicular to", "substantially symmetrical", etc. means that the macroscopic size or relative position relationship between the two features is very close to the relationship mentioned. However, those skilled in the art know that due to objective factors such as errors and tolerances, the position relationship of objects is difficult to be constrained exactly at a small scale or even at a microscopic angle. Therefore, even if there is a slight error in the size and position relationship between the two, it will not have a significant impact on the realization of the technical effect of the present application.

[0177] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0178] In each of the above-mentioned embodiments, although the above-mentioned methods are illustrated and described as a series of actions for simplicity of explanation, a person of ordinary skill in the art should understand and appreciate that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0179] Finally, it should be noted that those skilled in the art can understand that in order to enable readers to better understand the present application, the embodiments of the present application provide many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned embodiments, the technical solutions claimed for protection by the claims of the present application can be basically realized. Therefore, in practical applications, various changes can be made to the above-mentioned embodiments in form and detail without departing from the spirit and scope of the present application.

Claims

1. A switch assembly of a refueling gun, arranged on the refueling gun; The refueling gun comprises a gun body, a cavity is arranged inside the gun body, and a valve assembly is arranged inside the cavity; It is characterized in that The switch assembly of the fuel gun includes: A sleeve, wherein the sleeve is connected with a trigger mechanism; A push rod, partially contained in the sleeve and in corresponding contact with the valve assembly, wherein the push rod tends to move toward the direction of the sleeve under the action of the valve assembly to close the oil passage; A trigger and a transmission member, wherein the trigger is in transmission connection with the sleeve through the transmission member, so as to actuate the trigger mechanism through the sleeve to move toward the push rod, and actuate the valve assembly with the help of the push rod, so as to open the oil passage; A return spring is connected with the trigger.

2. The switch assembly of the fuel gun according to claim 1, characterized in that: The transmission component comprises: A drive shaft, disposed on the sleeve; A fulcrum shaft is arranged on the gun body; A transmission rod, respectively connected to the trigger, the drive shaft and the fulcrum shaft; When the trigger is pressed, the transmission rod is driven to perform circular motion with the fulcrum axis as the center, and at the same time the drive shaft is actuated to drive the sleeve to perform linear motion.

3. The switch assembly of the fuel gun according to claim 2, characterized in that: The transmission rod is connected to a first side of the trigger; One end of the return spring is connected to the gun body, and the other end is connected to the first side of the trigger.

4. The switch assembly of the fuel gun according to claim 2, characterized in that: The drive shaft passes through the sleeve.

5. The switch assembly of the fuel gun according to claim 4, characterized in that: The sleeve has a cylindrical portion on a side close to the push rod, and a solid portion on a side away from the push rod, and the drive shaft passes through the solid portion.

6. The switch assembly of the fuel gun according to claim 5, characterized in that: The depth of the cylindrical portion is less than or equal to 5 cm.

7. The switch assembly of the fuel gun according to claim 4, characterized in that: The driving shaft penetrates the sleeve in a radial direction of the sleeve.

8. The switch assembly of the fuel gun according to claim 1, characterized in that: The push rod can freely rotate relative to the sleeve with its own axis as the rotation axis.

9. A refueling gun, characterized in that: The fuel gun has a switch assembly as claimed in any one of claims 1 to 8.

10. A fuel dispenser, characterized in that: The fuel dispenser is provided with the fuel gun according to claim 9.

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