A function detection machine for fuel dispenser

Abstract

The utility model relates to oiling gun function test technical field discloses a kind of oiling gun function detection machine, including workbench, first fixture, life testing device, second fixture and air tightness testing device;First fixture and life testing device are all located on workbench, first fixture is used to chuck oiling gun, life testing device is located in the side of first fixture, and is connected with the trigger handle of oiling gun on first fixture, life testing device is used to drive trigger handle to carry out switch action, and the switch number of oiling gun is detected;Air tightness testing device is located on workbench, second fixture is located in the inside of air tightness testing device, and is used to chuck oiling gun, air tightness testing device is used to block the oil inlet end and oil outlet end of oiling gun on second fixture, and the air tightness of oiling gun is detected.The utility model can solve how to test simultaneously the service life and air tightness of oiling gun.

Description

Technical Field

[0001] This utility model relates to the field of fuel nozzle function testing technology, specifically to a fuel nozzle function testing machine. Background Technology

[0002] With the rapid development of the automotive industry, the frequency and demand for fuel nozzles are constantly increasing. Over prolonged use, fuel nozzles may develop potential problems such as inaccurate flow rates and poor sealing. These issues not only affect the normal operation of gas stations but may also pose potential threats to user safety. Therefore, after fuel nozzles are assembled, they need to undergo rigorous functional testing, primarily including lifespan and airtightness tests. However, existing fuel nozzle functional testing machines on the market have significant limitations.

[0003] Existing testing equipment is limited in function, with most only capable of testing either service life or airtightness, failing to meet practical testing needs. Furthermore, existing fuel nozzle service life and airtightness testing devices have significant problems with the clamping method of the fuel nozzle fixture. The clamping structure of these devices is often quite complex. During clamping, operators need a high level of skill and extensive experience to accurately fix the fuel nozzle to the fixture. This complex clamping method not only increases the workload and difficulty for operators but also easily leads to inaccurate clamping, thus affecting the accuracy and reliability of the test results.

[0004] Therefore, it is necessary to develop a fuel nozzle function testing machine that can comprehensively and accurately test the service life and airtightness of fuel nozzles at the same time, so as to meet the comprehensive testing needs in actual production. Utility Model Content

[0005] (a) Technical problems to be solved This invention provides a fuel nozzle function testing machine, which can at least solve the technical problem of how to simultaneously test the service life and airtightness of a fuel nozzle.

[0006] (II) Technical Solution To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fuel nozzle function testing machine, wherein the fuel nozzle includes a barrel, a stock, and a trigger handle, and the barrel includes an oil inlet end and an oil outlet end; the fuel nozzle function testing machine includes: Workbench; The first fixture and the life testing device are both set on the workbench. The first fixture is used to clamp the refueling nozzle. The life testing device is located on one side of the first fixture and is connected to the trigger handle of the refueling nozzle on the first fixture. The life testing device is used to drive the trigger handle to perform the switching action and to detect the number of times the refueling nozzle is switched on and off. The second clamp and the airtightness testing device are located on the workbench. The second clamp is located inside the airtightness testing device and is used to clamp the refueling nozzle. The airtightness testing device is used to seal the oil inlet and outlet of the refueling nozzle on the second clamp and to test the airtightness of the refueling nozzle.

[0007] Further, the aforementioned second clamp includes: The second limiting seat is fixed inside the airtightness testing device and is provided with a second limiting hole for the oil inlet end to pass through; The first clamping plate is fixed inside the airtightness testing device, and the second clamping plate is movably disposed on one side of the first clamping plate. A clamping space for clamping the gunstock is formed between the second clamping plate and the first clamping plate. The clamping plate drive mechanism is fixed inside the airtightness testing device and is connected to the second clamping plate for transmission. The clamping plate drive mechanism is used to drive the second clamping plate to move toward or away from the first clamping plate in order to clamp or release the stock.

[0008] Furthermore, the aforementioned airtightness testing device includes: The test water tank is placed on the workbench, and the second clamp is placed inside the test water tank. The height of the test water tank is greater than the height of the refueling gun on the second clamp. A first plug, a second plug, a first drive mechanism, and a second drive mechanism are arranged sequentially on the same straight line. The first plug is positioned opposite to the oil inlet end, and the second plug is positioned opposite to the oil outlet end. Both the first drive mechanism and the second drive mechanism are fixed inside the test water tank. The first drive mechanism is driven by the first plug and is used to drive the first plug to move axially along the oil inlet end to block or open the oil inlet end. The second drive mechanism is driven by the second plug and is used to drive the second plug to move axially along the oil outlet end to block or open the oil outlet end. The air supply mechanism has its outlet end connected to the first plug and is used to supply air to the oil inlet end.

[0009] Further configuration: the aforementioned clamping plate drive mechanism, first drive mechanism, and second drive mechanism are all telescopic cylinders; the air supply mechanism includes: The intake manifold has an intake end for connecting to an external compressed air source. The outlet end of the intake manifold is connected to a first branch pipe, a second branch pipe, and a third branch pipe via a four-way connector. The first branch pipe is connected to a test air pipe via a first three-way reversing valve, and the outlet end of the test air pipe is connected to a first plug. The second branch pipe is connected to a clamp drive air pipe via a second three-way reversing valve, and the clamp drive air pipe is connected to the clamp drive mechanism. The third branch pipe is connected to a first drive air pipe and a second drive air pipe via a four-way reversing valve. The first drive air pipe is connected to the extended intake end of the first drive mechanism and the extended intake end of the second drive mechanism via a three-way connector, and the second drive air pipe is connected to the shortened intake end of the first drive mechanism and the shortened intake end of the second drive mechanism via a three-way connector. The pressure regulating valve is located at the air inlet end of the air intake manifold and is used to regulate the pressure of the gas entering the air intake manifold.

[0010] Further, the aforementioned first clamp includes: The first limiting seat is fixed on the worktable and is provided with a first limiting hole for the oil supply end to pass through; The base and a clamping assembly slidably mounted on the base vertically. The clamping assembly includes a first clamping arm, a second clamping arm, and a screw connector. The first and second clamping arms are symmetrical to each other. The opposite sides of the first and second clamping arms are provided with arc-shaped recesses. A clamping hole for the oil inlet end to pass through is formed between the recesses of the first and second clamping arms. One end of the first clamping arm and one end of the second clamping arm are integrally connected. The screw connector passes through the other end of the first clamping arm and is screwed onto the other end of the second clamping arm to reduce or enlarge the clamping hole, thereby clamping or releasing the oil inlet end. Locking element, used to secure the clamping assembly and the base.

[0011] Further, the aforementioned life testing device includes: Mounting base, located on the workbench; The system includes a cam, a main shaft, and a rotary drive mechanism. The main shaft is rotatably mounted on a mounting base. The cam is mounted on the main shaft and is used to abut against the trigger handle. The rotary drive mechanism is mounted on the mounting base and is connected to the main shaft for transmission. The rotary drive mechanism is used to drive the main shaft and the cam on it to rotate, so as to drive the trigger handle to perform the switching action. The counting mechanism, mounted on the mounting base and connected to the main shaft, is used to detect the number of rotations of the main shaft, thereby obtaining the number of times the refueling nozzle is switched on and off.

[0012] Further, the aforementioned mounting base includes a first slide and a second slide, both of which are slidably mounted on the worktable along the axial direction of the spindle. The life testing device also includes a locking assembly, which is used to fix the mounting base and the worktable. The main shaft includes a first rotating shaft and a second rotating shaft. The first rotating shaft is rotatably connected to a first slide. One end of the first rotating shaft is screwed to one end of the second rotating shaft. The counting mechanism is located on the second slide and is connected to the other end of the second rotating shaft. The cam is located on either the first or the second rotating shaft. The rotary drive mechanism is located on the first slide and is connected to the first rotating shaft for transmission.

[0013] (III) Beneficial Effects Compared with the prior art, the fuel nozzle function testing machine provided by this utility model has the following beneficial effects: The fuel nozzle function testing machine provided by this utility model, when performing lifespan testing, firstly, clamps the fuel nozzle under test onto a first fixture, then activates the lifespan testing device. The lifespan testing device drives the trigger handle of the fuel nozzle under test to open and close, simultaneously detecting the number of times the fuel nozzle is opened and closed. When the trigger handle is opened but the fuel nozzle does not output fuel, it indicates a fuel nozzle malfunction. Finally, the lifespan of the fuel nozzle is assessed by counting the number of times the fuel nozzle was opened and closed before failure. When performing airtightness testing, firstly, clamps the fuel nozzle under test onto a second fixture, then activates the airtightness testing device. The airtightness testing device seals both the inlet and outlet ends of the fuel nozzle under test, simultaneously detecting the airtightness of the fuel nozzle. It can be seen that this utility model integrates the two core functions of lifespan testing and airtightness testing onto the same platform, enabling comprehensive and accurate testing of both the lifespan and airtightness of fuel nozzles simultaneously, meeting the comprehensive testing needs in actual production. Attached Figure Description

[0014] Figure 1 This is a perspective view of the fuel nozzle function testing machine in the embodiment; Figure 2 This is a schematic diagram of the structure of the second clamp and the airtightness testing device in the embodiment; Figure 3 This is a schematic diagram of the structure of the first fixture and the life testing device in the embodiment.

[0015] Icon labels: 1. Workbench; 2. First clamp; 21. First limiting seat; 211. First limiting hole; 22. Base; 23. Clamping assembly; 231. First clamping arm; 2311. Recess; 232. Second clamping arm; 233. Screw connector; 24. Locking component; 25. Clamping hole; 3. Life testing device; 31. Mounting base; 311. First slide; 312. Second slide; 32. Cam; 33. Main shaft; 331. First rotating shaft; 332. Second rotating shaft; 34. Rotary drive mechanism; 35. Counting mechanism; 36. Locking assembly; 4. Second clamp; 41. Second limiting seat; 411. Second limiting hole; 42. First clamping plate; 43. Second clamping plate; 44. Clamping plate driving mechanism; 45. Clamping space; 5. Air tightness testing device; 51. Test water tank; 52. First blocking block; 53. Second blocking block; 54. First drive mechanism; 55. Second drive mechanism; 56. Air supply mechanism; 561. Main air inlet pipe; 562. Pressure regulating valve; 563. First branch pipe; 564. Second branch pipe; 565. Third branch pipe; 566. First three-way reversing valve; 567. Test air pipe; 568. Second three-way reversing valve; 569. Clamping plate drive air pipe; 570. Four-way reversing valve; 571. First drive air pipe; 572. Second drive air pipe; 6. Fuel nozzle; 61. Nozzle; 611. Inlet; 612. Outlet; 62. Stock; 63. Trigger handle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a fuel nozzle function testing machine to solve the problem of how to simultaneously test the service life and airtightness of the fuel nozzle 6.

[0018] See Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 This is a perspective view of the fuel nozzle function testing machine in the embodiment. Figure 2 This is a schematic diagram of the structure of the second clamp and the airtightness testing device in the embodiment. Figure 3 The diagram shows the structure of the first fixture and the life testing device in the embodiment. The fuel nozzle function testing machine includes a workbench 1, a first fixture 2, a life testing device 3, a second fixture 4, and an airtightness testing device 5.

[0019] The fuel nozzle 6 includes a barrel 61, a stock 62, and a trigger handle 63. The barrel 61 includes an inlet end 611 and an outlet end 612.

[0020] Both the first clamp 2 and the life testing device 3 are mounted on the workbench 1. The first clamp 2 is used to clamp the refueling nozzle 6, and the life testing device 3 is located on one side of the first clamp 2 and is connected to the trigger handle 63 of the refueling nozzle 6 on the first clamp 2. The life testing device 3 is used to drive the trigger handle 63 to perform switching actions and to detect the number of times the refueling nozzle 6 is switched on and off.

[0021] An airtightness testing device 5 is mounted on a workbench 1. A second clamp 4 is mounted inside the airtightness testing device 5 and is used to clamp the refueling nozzle 6. The airtightness testing device 5 is used to seal the oil inlet end 611 and the oil outlet end 612 of the refueling nozzle 6 on the second clamp 4 and to test the airtightness of the refueling nozzle 6.

[0022] When performing lifespan testing, the fuel nozzle function testing machine of the above technical solution first clamps the fuel nozzle 6 under test onto the first fixture 2; then, it starts the lifespan testing device 3, which drives the trigger handle 63 of the fuel nozzle 6 to switch on and off, while simultaneously detecting the number of times the fuel nozzle 6 switches on and off. When the trigger handle 63 is open but the fuel nozzle 6 does not output fuel, it indicates that the fuel nozzle 6 is faulty. Finally, the lifespan of the fuel nozzle 6 is evaluated by counting the number of times the fuel nozzle 6 switches on and off before failure. When performing airtightness testing, the same fuel nozzle function testing machine first clamps the fuel nozzle 6 under test onto the second fixture 4, then starts the airtightness testing device 5, which seals the inlet end 611 and outlet end 612 of the fuel nozzle 6 under test, while simultaneously detecting the airtightness of the fuel nozzle 6. It can be seen that this utility model integrates the two core functions of lifespan testing and airtightness testing on the same platform, enabling comprehensive and accurate testing of the lifespan and airtightness of the fuel nozzle 6 simultaneously, meeting the comprehensive testing needs in actual production.

[0023] See Figure 1 and Figure 2As shown, in one embodiment of the second clamp 4, the second clamp 4 includes a second limiting seat 41, a first clamping plate 42, a second clamping plate 43, and a clamping plate driving mechanism 44. The second limiting seat 41 is fixed inside the airtightness testing device 5 by welding or screwing, and has a second limiting hole 411 for the oil inlet end 611 to pass through. The first clamping plate 42 is fixed inside the airtightness testing device 5 by welding or screwing. The second clamping plate 43 is movably located on one side of the first clamping plate 42, and a clamping space 45 for clamping the stock 62 is formed between the second clamping plate 43 and the first clamping plate 42. The clamping plate driving mechanism 44 is fixed inside the airtightness testing device 5 by welding or screwing, and its output end is connected to the second clamping plate 43 by welding or screwing. The clamping plate driving mechanism 44 is used to drive the second clamping plate 43 to move toward or away from the first clamping plate 42 to clamp or release the stock 62. Thus, when the second clamp 4 is used, the butt 62 of the fuel nozzle 6 is placed in the clamping space 45, and the oil inlet end 611 passes through the second limiting hole 411. Subsequently, the clamping plate driving mechanism 44 drives the second clamping plate 43 to move towards the first clamping plate 42, thereby clamping the fuel nozzle 6. After the airtightness test is completed, the clamping plate driving mechanism 44 drives the second clamping plate 43 to move away from the first clamping plate 42, thereby releasing the butt 62 and facilitating the removal of the fuel nozzle 6. It can be seen that the second clamp 4 can initially position the fuel nozzle 6 through the second limiting hole 411 of the second limiting seat 41. Combined with the clamping of the butt 62 by the first clamping plate 42, the second clamping plate 43, and the clamping plate driving mechanism 44, the position of the fuel nozzle 6 can be completely positioned. This clamping structure is simple and easy to operate, and it can ensure the accuracy of the position of the fuel nozzle 6 during testing, so as not to affect the accuracy and reliability of the airtightness test results of the fuel nozzle 6.

[0024] See Figure 1 and Figure 2As shown, in one embodiment of the airtightness testing device 5, the airtightness testing device 5 includes a test water tank 51, a first blocking block 52, a second blocking block 53, a first driving mechanism 54, a second driving mechanism 55, and an air supply mechanism 56. The test water tank 51 is mounted on the workbench 1 by means of placement or screwing. The second clamp 4 is installed inside the test water tank 51, and the height of the test water tank 51 is greater than the height of the oil nozzle 6 on the second clamp 4. The first blocking block 52, the second limiting seat 41, and the second blocking block 53 are arranged sequentially on the same straight line. The first blocking block 52 is positioned opposite to the oil inlet end 611, and the second blocking block 53 is positioned opposite to the oil outlet end 612. The first driving mechanism 54 and the second driving mechanism 55 are both fixed inside the test water tank 51 by means of screwing or welding. The output end of the first drive mechanism 54 is connected to the first plug 52 by means of screwing or welding. The first drive mechanism 54 is used to drive the first plug 52 to move axially along the oil inlet end 611 to block or open the oil inlet end 611. The output end of the second drive mechanism 55 is connected to the second plug 53 by means of screwing or welding. The second drive mechanism 55 is used to drive the second plug 53 to move axially along the oil outlet end 612 to block or open the oil outlet end 612. The air supply mechanism 56 has its air outlet end connected to the first plug 52 and is used to supply air to the oil inlet end 611. Thus, during the airtightness test, firstly, the fuel nozzle 6 is clamped onto the second clamp 4, at which point the positions of its inlet end 611 and outlet end 612 are automatically aligned with the positions of the first block 52 and the second block 53. Then, the first drive mechanism 54 is activated to drive the first block 52 to block the inlet end 611, and simultaneously the second drive mechanism 55 is activated to drive the second block 53 to block the outlet end 612. Next, the air supply mechanism 56 introduces gas into the fuel nozzle 6, while simultaneously injecting water into the test water tank 51 until the entire fuel nozzle 6 is submerged, and observes whether there are air bubbles in the water. After the observation is completed, the air supply mechanism 56 stops supplying gas, and simultaneously drains the water from the test water tank 51. Finally, the first drive mechanism 54 is activated to drive the first block 52 back to its original position, opening the inlet end 611, and simultaneously the second drive mechanism 55 is activated to drive the second block 53 back to its original position, opening the outlet end 612, and the fuel nozzle 6 is removed from the second clamp 4. As can be seen, the airtightness testing device 5 provides the testing environment through the test water tank 51; through the cooperation of the first blocking block 52, the second blocking block 53, the first driving mechanism 54, and the second driving mechanism 55, the sealing and opening of the oil inlet end 611 and the oil outlet end 612 of the refueling nozzle 6 can be flexibly and precisely controlled, realizing the automated operation of the airtightness test; the air supply mechanism 56 can provide an air source for the airtightness test, ensuring the smooth progress of the test. In addition, the height design of the test water tank 51 ensures that the refueling nozzle 6 can be completely submerged in water for airtightness testing.

[0025] See Figure 1 and Figure 2As shown, in one embodiment of the clamping plate drive mechanism 44, the first drive mechanism 54, the second drive mechanism 55, and the air supply mechanism 56, the clamping plate drive mechanism 44, the first drive mechanism 54, and the second drive mechanism 55 are all telescopic cylinders. The air supply mechanism 56 includes an intake manifold 561 and a pressure regulating valve 562. The intake end of the intake manifold 561 is used to connect to an external compressed air source, and the outlet end of the intake manifold 561 is connected to a first branch pipe 563, a second branch pipe 564, and a third branch pipe 565 via a four-way connector. The first branch pipe 563 is connected to a test air pipe 567 via a first three-way reversing valve 566, and the outlet end of the test air pipe 567 is connected to a first plug 52. The second branch pipe 564 is connected to a clamping plate drive air pipe 569 via a second three-way reversing valve 568, and the clamping plate drive air pipe 569 is connected to the clamping plate drive mechanism 44. The third branch pipe 565 is connected to the first drive air pipe 571 and the second drive air pipe 572 via a four-way reversing valve 570. The first drive air pipe 571 is connected to the extended air inlet end of the first drive mechanism 54 and the extended air inlet end of the second drive mechanism 55 via a three-way connector. The second drive air pipe 572 is connected to the shortened air inlet end of the first drive mechanism 54 and the shortened air inlet end of the second drive mechanism 55 via a three-way connector. The pressure regulating valve 562 is installed on the air inlet end of the main air inlet pipe 561 and is used to regulate the pressure of the gas input into the main air inlet pipe 561.Thus, during the airtightness test, firstly, the refueling nozzle 6 is placed on the second clamp 4; then, gas is introduced into the main air inlet pipe 561, and the pressure is adjusted to the required working pressure value through the pressure regulating valve 562. The second three-way reversing valve 568 is rotated to connect the second branch pipe 564 and the clamping plate drive air pipe 569, allowing gas to be introduced into the clamping plate drive mechanism 44. The output end of the clamping plate drive mechanism 44 extends to clamp the refueling nozzle 6; after the refueling nozzle 6 is clamped, the four-way reversing valve 57 is rotated. 0. Connect the third branch pipe 565 and the first driving air pipe 571, while simultaneously cutting off the third branch pipe 565 and the second driving air pipe 572. Gas is introduced into the extended air inlet end of the first driving mechanism 54 and the extended air inlet end of the second driving mechanism 55. The output ends of both the first driving mechanism 54 and the second driving mechanism 55 are extended, respectively blocking the oil inlet end 611 and the oil outlet end 612. Then, rotate the first three-way reversing valve 566 to connect the first branch pipe 563 and the test air pipe 567. Gas is introduced into the fuel nozzle 6, and the presence of air bubbles in the water is observed. After observation, the first three-way reversing valve 566 is rotated to disconnect the first branch pipe 563 and the test air pipe 567, stopping the gas flow into the fuel nozzle 6. At this time, the gas in the fuel nozzle 6 can be discharged from the unconnected end of the first three-way reversing valve 566 through the test air pipe 567. After draining the water in the test water tank 51, the four-way reversing valve 570 is rotated to connect the third branch pipe 565 and the second drive air pipe 572, while simultaneously disconnecting the third branch pipe 565 and the first drive air pipe 571. Gas is introduced into the shortened air inlet end of the first drive mechanism 54 and the shortened air inlet end of the second drive mechanism 55. The output ends of the first drive mechanism 54 and the second drive mechanism 55 are both retracted, opening the oil inlet end 611 and the oil outlet end 612 respectively. Finally, the second three-way reversing valve 568 is rotated to disconnect the second branch pipe 564 and the clamp drive air pipe 569, retracting the output end of the clamp drive mechanism 44 and releasing the fuel nozzle 6. It can be seen that the gas supply mechanism 56 can not only provide the gas with the required testing pressure to the refueling gun 6, but also provide the gas required for driving the clamping plate drive mechanism 44, the first drive mechanism 54, and the second drive mechanism 55. Furthermore, the clamping plate drive mechanism 44, the first drive mechanism 54, and the second drive mechanism 55 all use telescopic cylinders as drive mechanisms, greatly reducing equipment costs. In addition, the gas supply mechanism 56 can adjust the input gas pressure through the pressure regulating valve 562 to meet the gas pressure requirements under different testing scenarios, improving the accuracy and stability of the testing.

[0026] In addition to the above-described embodiments, the clamping plate drive mechanism 44, the first drive mechanism 54, and the second drive mechanism 55 can also employ other linear drive mechanisms such as telescopic poles.

[0027] The aforementioned first three-way directional valve 566 and second three-way directional valve 568 can use existing three-way directional valves, and the aforementioned four-way directional valve 570 can use existing four-way directional valves. In this embodiment, both the first three-way directional valve 566 and second three-way directional valve 568 are two-position three-way manual directional valves, and the four-way directional valve 570 is a two-position four-way manual directional valve.

[0028] See Figure 1 and Figure 3 As shown, in one embodiment of the first clamp 2, the first clamp 2 includes a first limiting seat 21, a base 22, a clamping assembly 23, and a locking member 24. The first limiting seat 21 is fixed to the worktable 1 by means of screwing or welding, and the first limiting seat 21 has a first limiting hole 211 for the oil inlet end 612 to pass through. The clamping assembly 23 is slidably connected to the base 22 vertically, and the clamping assembly 23 includes a first clamping arm 231, a second clamping arm 232, and a screw connection member 233. The first clamping arm 231 and the second clamping arm 232 are symmetrical to each other, and each of the opposite sides of the first clamping arm 231 and the second clamping arm 232 has an arc-shaped recess 2311. A clamping hole 25 for the oil inlet end 611 to pass through is formed between the recess 2311 of the first clamping arm 231 and the recess 2311 of the second clamping arm 232. One end of the first clamping arm 231 and one end of the second clamping arm 232 are integrally connected. The screw connector 233 passes through the other end of the first clamping arm 231 and is screwed onto the other end of the second clamping arm 232 to reduce or expand the clamping hole 25, thereby clamping or releasing the oil inlet end 611. The locking member 24 is used to fix the clamping assembly 23 and the base 22. Thus, when the first clamp 2 is used, the oil outlet end 612 of the fuel nozzle 6 passes through the second limiting hole 411, and then the oil inlet end 611 passes through the clamping hole 25; then, the screw connector 233 is rotated to fasten the oil inlet end 611 to the clamping assembly 23; finally, the clamping assembly 23 is slid vertically to adjust the height position of the oil inlet end 611, and the position of the clamping assembly 23 on the base 22 is fixed by the locking member 24, thereby realizing the clamping of the fuel nozzle 6. As can be seen, the first clamp 2 can position the oil outlet end 612 of the fuel nozzle 6 through the first limiting hole 211 of the first limiting seat 21, and can position the oil inlet end 611 of the fuel nozzle 6 through the cooperation of the base 22, the clamping assembly 23 and the locking member 24, thereby completely positioning the fuel nozzle 6 and ensuring the stability of the fuel nozzle 6 during the life test. This clamping structure is simple and easy to operate, and it can ensure the accuracy of the position of the fuel nozzle 6 during the test, so as not to affect the accuracy and reliability of the fuel nozzle 6 life test results.

[0029] Both the locking member 24 and the screwed member 233 can be made of screws or threaded rods. In this embodiment, the locking member 24 is screwed onto the clamping assembly 23 and abuts against the base 22, thereby tightly connecting the clamping assembly 23 and the base 22.

[0030] See Figure 1 and Figure 3 As shown, in one embodiment of the life testing device 3, the life testing device 3 includes a mounting base 31, a cam 32, a main shaft 33, a rotary drive mechanism 34, and a counting mechanism 35. The mounting base 31 is mounted on the worktable 1 via a screw connection or sliding connection. The main shaft 33 is rotatably connected to the mounting base 31. The cam 32 is mounted on the main shaft 33 via an integral connection or key connection and is used to abut against the trigger handle 63. The rotary drive mechanism 34 is mounted on the mounting base 31 via a screw connection or welding and is drively connected to the main shaft 33. The rotary drive mechanism 34 drives the main shaft 33 and its cam 32 to rotate, thereby driving the trigger handle 63 to perform a switching action. The counting mechanism 35 is mounted on the mounting base 31 via a screw connection or welding and is connected to the main shaft 33. The counting mechanism 35 detects the number of rotations of the main shaft 33, thereby obtaining the number of times the refueling nozzle 6 is switched on and off. Thus, when the life testing device 3 is in use, in the initial state, the short shaft end of the cam 32 is tangent to the trigger handle 63. The rotary drive mechanism 34 drives the main shaft 33 and the cam 32 on it to rotate together. During the rotation of the cam 32, the long shaft end of the cam 32 pushes up the trigger handle 63, thereby opening the fuel nozzle 6. After repeatedly opening and closing the fuel nozzle 6, if the cam 32 pushes up the trigger handle 63 but the fuel nozzle 6 does not output fuel, or if the fuel output of the fuel nozzle 6 deviates from the set range, it indicates that the fuel nozzle 6 is faulty. By counting the number of times the fuel nozzle 6 was opened and closed and the cumulative fuel output before the failure, the service life of the fuel nozzle 6 can be evaluated. It can be seen that the life testing device 3, through the cooperation of the cam 32, the main shaft 33 and the rotary drive mechanism 34, can simulate the actual opening and closing action of the trigger handle 63 of the fuel nozzle 6. Combined with the data collected by the counting mechanism 35, it can realize the test of the service life of the fuel nozzle 6.

[0031] The aforementioned lifespan testing device 3 may further include an oil level detection mechanism (not shown in the figure). This mechanism is connected to the oil outlet 612 of the fuel nozzle 6 on the first clamp 2 and is used to detect the amount of fuel dispensed by the fuel nozzle 6. Thus, the lifespan testing device 3 can assess the lifespan of the fuel nozzle 6 not only by counting the number of times it was switched on and off before failure, but also by counting whether the cumulative fuel output before failure is within a set range. If it deviates from the set range, it indicates a malfunction in the fuel nozzle 6. Therefore, the lifespan testing device 3 combines the data collected by the counting mechanism 35 and the oil level detection mechanism to comprehensively assess the lifespan of the fuel nozzle 6, making the lifespan test results more accurate. The oil level detection mechanism can detect the cumulative fuel output of the fuel nozzle 6 using a combination of a fuel tank and a level gauge or weight detector mounted on the tank, or it can detect the cumulative fuel output of the fuel nozzle 6 using a flow meter.

[0032] See Figure 1 and Figure 3As shown, in one embodiment of the mounting base 31 and the spindle 33, the mounting base 31 includes a first slide 311 and a second slide 312. Both the first slide 311 and the second slide 312 are slidably connected to the worktable 1 along the axial direction of the spindle 33 via slide rails. The life testing device 3 also includes a locking assembly 36, which is used to secure the mounting base 31 and the worktable 1. The spindle 33 includes a first rotating shaft 331 and a second rotating shaft 332. The first rotating shaft 331 is rotatably connected to the first slide 311. One end of the first rotating shaft 331 is screwed to one end of the second rotating shaft 332. A counting mechanism 35 is mounted on the second slide 312 by screwing or welding, and is connected to the other end of the second rotating shaft 332. A cam 32 is mounted on the first rotating shaft 331 or the second rotating shaft 332 by integral connection or key connection. A rotary drive mechanism 34 is mounted on the first slide 311 by screwing or welding, and is drively connected to the first rotating shaft 331. Thus, before the life test, firstly, the fuel nozzle 6 is clamped onto the first fixture 2, and then the first rotating shaft 331 and the second rotating shaft 332 are screwed together to form the main shaft 33, with the main shaft 33 passing through the stock 62; then, the first slide 311 and the second slide 312 are slid so that the cam 32 is located at the trigger handle 63, and the short shaft end of the cam 32 is tangent to the trigger handle 63; finally, the mounting base 31 and the worktable 1 are fixed by the locking component 36, restricting the first slide 311 and the second slide 312 from sliding, thus completing the connection between the life test device 3 and the fuel nozzle 6 on the first fixture 2, and the life test can then be carried out; after the life test is completed, the connection between the locking component 36 and the mounting base 31 and the worktable 1 is released, and then the screw connection between the first rotating shaft 331 and the second rotating shaft 332 is released. Finally, the fuel nozzle 6 is removed from the first fixture 2. The connection structure between the life testing device 3 and the refueling gun 6 on the first clamp 2 is simple, easy to assemble and disassemble, and can adapt to the testing of refueling guns 6 of different specifications.

[0033] The aforementioned rotary drive mechanism 34 can use a rotary cylinder or a DC motor, and its output end is connected to the main shaft 33 via a gear set. The aforementioned counting mechanism 35 can use a counter, and its detection end is connected to the second rotating shaft 332 via a coupling. The aforementioned locking assembly 36 can use two screws or bolts to fix the first slide 311, the second slide 312, and the worktable 1 respectively. In this embodiment, the locking assembly 36 uses two screws, which are screwed onto the first slide 311 and the second slide 312 respectively, and both are tightly abutting against the corresponding slide rails, thereby tightly connecting the first slide 311 to the worktable 1, and the second slide 312 to the worktable 1.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuel nozzle function testing machine, wherein the fuel nozzle includes a barrel, a stock, and a trigger handle, the barrel including an oil inlet end and an oil outlet end, characterized in that, The fuel nozzle function testing machine includes: Workbench; The first fixture and the life testing device are both mounted on the workbench. The first fixture is used to hold the refueling nozzle. The life testing device is located on one side of the first fixture and is connected to the trigger handle of the refueling nozzle on the first fixture. The life testing device is used to drive the trigger handle to perform a switching action and to detect the number of times the refueling nozzle is switched on and off. The second clamp and the airtightness testing device are provided on the workbench. The second clamp is located inside the airtightness testing device and is used to clamp the refueling nozzle. The airtightness testing device is used to seal the oil inlet and outlet of the refueling nozzle on the second clamp and to test the airtightness of the refueling nozzle.

2. The fuel nozzle function testing machine according to claim 1, characterized in that, The second clamp includes: The second limiting seat is fixed inside the airtightness testing device and is provided with a second limiting hole for the oil inlet end to pass through; A first clamping plate and a second clamping plate, wherein the first clamping plate is fixed inside the airtightness testing device, and the second clamping plate is movably disposed on one side of the first clamping plate, and a clamping space for clamping the stock is formed between the second clamping plate and the first clamping plate. The clamping plate driving mechanism is fixed inside the airtightness testing device and is connected to the second clamping plate in a transmission manner. The clamping plate driving mechanism is used to drive the second clamping plate to move toward or away from the first clamping plate in order to clamp or release the stock.

3. The fuel nozzle function testing machine according to claim 2, characterized in that, The airtightness testing device includes: A test water tank is placed on the workbench, and the second clamp is placed inside the test water tank. The height of the test water tank is greater than the height of the refueling gun on the second clamp. A first plug, a second plug, a first drive mechanism, and a second drive mechanism are arranged sequentially on the same straight line. The first plug is positioned opposite to the oil inlet end, and the second plug is positioned opposite to the oil outlet end. Both the first drive mechanism and the second drive mechanism are fixed inside the test water tank. The first drive mechanism is driven by the first plug and is used to drive the first plug to move axially along the oil inlet end to block or open the oil inlet end. The second drive mechanism is driven by the second plug and is used to drive the second plug to move axially along the oil outlet end to block or open the oil outlet end. An air supply mechanism, wherein the air outlet of the air supply mechanism is connected to the first plug and is used to supply air to the oil inlet.

4. The fuel nozzle function testing machine according to claim 3, characterized in that, The clamping plate driving mechanism, the first driving mechanism, and the second driving mechanism are all telescopic cylinders; the air supply mechanism includes: The main intake pipe has an intake end for connecting to an external compressed air source. Its outlet end is connected to a first branch pipe, a second branch pipe, and a third branch pipe via a four-way connector. The first branch pipe is connected to a test air pipe via a first three-way reversing valve, and the outlet end of the test air pipe is connected to the first plug. The second branch pipe is connected to a clamp drive air pipe via a second three-way reversing valve, and the clamp drive air pipe is connected to the clamp drive mechanism. The third branch pipe is connected to a first drive air pipe and a second drive air pipe via a four-way reversing valve. The first drive air pipe is connected to the extended intake end of the first drive mechanism and the extended intake end of the second drive mechanism via a three-way connector, and the second drive air pipe is connected to the shortened intake end of the first drive mechanism and the shortened intake end of the second drive mechanism via a three-way connector. A pressure regulating valve is located at the inlet end of the main intake pipe and is used to regulate the pressure of the gas input into the main intake pipe.

5. The fuel nozzle function testing machine according to any one of claims 1-4, characterized in that, The first fixture includes: The first limiting seat is fixed on the worktable and is provided with a first limiting hole for the oil outlet end to pass through; The base and a clamping assembly slidably mounted on the base vertically, the clamping assembly including a first clamping arm, a second clamping arm and a screw connector, the first clamping arm and the second clamping arm being symmetrical to each other, each of the first clamping arm and the second clamping arm having an arc-shaped recess on opposite sides, a clamping hole for the oil inlet end to pass through between the recesses of the first clamping arm and the recesses of the second clamping arm, one end of the first clamping arm and one end of the second clamping arm being integrally connected, the screw connector passing through the other end of the first clamping arm and screwed onto the other end of the second clamping arm to reduce or enlarge the clamping hole, thereby clamping or releasing the oil inlet end; A locking element for securing the clamping assembly and the base.

6. The fuel nozzle function testing machine according to any one of claims 1-4, characterized in that, The lifetime testing device includes: A mounting base is provided on the workbench; The system includes a cam, a main shaft, and a rotary drive mechanism. The main shaft is rotatably mounted on the mounting base. The cam is mounted on the main shaft and is used to abut against the trigger handle. The rotary drive mechanism is mounted on the mounting base and is connected to the main shaft for transmission. The rotary drive mechanism is used to drive the main shaft and the cam on it to rotate, so as to drive the trigger handle to perform a switching action. A counting mechanism is mounted on the mounting base and connected to the main shaft. The counting mechanism is used to detect the number of rotations of the main shaft, thereby obtaining the number of times the fuel nozzle is switched on and off.

7. The fuel nozzle function testing machine according to claim 6, characterized in that, The mounting base includes a first slide and a second slide, both of which are slidably disposed on the worktable along the axial direction of the main shaft. The life testing device also includes a locking component for fixing the mounting base and the worktable. The main shaft includes a first rotating shaft and a second rotating shaft. The first rotating shaft is rotatably connected to the first slide. One end of the first rotating shaft is screwed to one end of the second rotating shaft. The counting mechanism is disposed on the second slide and connected to the other end of the second rotating shaft. The cam is disposed on the first rotating shaft or the second rotating shaft. The rotary drive mechanism is disposed on the first slide and is drivenly connected to the first rotating shaft.

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