Gas tightness detection device and method for oil and gas recovery

Abstract

The present invention belongs to the technical field of oil and gas recovery detection, and in particular to an airtightness detection device and method for oil and gas recovery. The airtightness detection device needs to be connected to a main pipe when in use. Since the existing connection method is relatively simple and prone to falling off and leakage, which causes errors in the detection results, the following scheme is proposed, including a fuel dispenser body, a detection module is provided on the fuel dispenser body, and the detection module includes a lifting mounting plate, a mounting circular hole is opened on one side of the fuel dispenser body, and an oil and gas recovery pipe is fixedly connected to the inside of the mounting circular hole, and the detection end of the oil and gas recovery pipe is connected to a detection valve via a flange. The present invention discloses an airtightness detection device and method for oil and gas recovery, which has the effect of preventing the airtightness detection device from falling off and leaking when connected to the main pipe by tightening it, thereby avoiding errors in the detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas recovery detection, and in particular to an air tightness detection device and method for oil and gas recovery. Background Art

[0002] There are many refueling devices on the market now. When refueling, they will replace the same volume of mixed oil and gas containing volatile and flammable substances from the fuel tank. The gas is highly volatile. Long-term operation in this environment is not conducive to human health and safety. In addition, the discharge into the air will increase air pollution. Similarly, since the exhaust gas can be recycled and reused according to existing technology, random discharge is also a waste of resources.

[0003] During the use of the existing gas station oil and gas recovery device, the gas station staff needs to check the oil and gas recovery device from time to time, especially to perform air tightness testing, to avoid leakage of the main pipe of the oil and gas recovery device, thereby reducing the recovery rate of the entire recovery process. The existing air tightness testing device needs to be connected to the main pipe when in use. Since the existing connection method is relatively simple, it is easy to fall off and leak, which causes errors in the test results. Summary of the invention

[0004] The present invention discloses an air tightness detection device and method for oil and gas recovery, aiming to solve the technical problem that the air tightness detection device in the background technology needs to be connected to a main pipe when in use, and the existing connection method is relatively simple and prone to falling off and leakage, thereby causing errors in the detection results.

[0005] The present invention proposes an air tightness detection device for oil and gas recovery, comprising a fuel dispenser body, a detection module being arranged on the fuel dispenser body, and the detection module comprising a lifting mounting plate and a tooling support plate, a mounting circular hole being opened on one side of the fuel dispenser body, and an oil and gas recovery pipe being fixedly connected inside the mounting circular hole, a detection end of the oil and gas recovery pipe being connected to a detection valve through a flange, one end of the oil and gas recovery pipe being fixedly connected to a metal telescopic pipe 2, one end of the metal telescopic pipe 2 being fixedly connected to an air flow sensor, and an air intake end of the air flow sensor being fixedly connected to two connecting pipes, one end of the two connecting pipes being fixedly connected to the same recovery circular hole A frame, a mounting circular opening is provided on the lifting mounting plate, and a suction circular frame is fixedly connected inside the mounting circular opening, a rubber sealing circular frame is fixedly connected to the suction end of the suction circular frame, the rubber sealing circular frame is attached to the outer wall of the detection end of the oil and gas recovery pipe, a circular hole is provided on the side of the fuel dispenser body, a double-way pipe is fixedly connected inside the circular hole, a metal telescopic pipe is fixedly connected to one end of the double-way pipe, one end of the metal telescopic pipe is fixedly connected to the air outlet end of the suction circular frame, a vacuum pump and a pressure detector are fixedly connected to the inner bottom of the fuel dispenser body, and the suction end of the vacuum pump and the detection end of the pressure detector are respectively connected to one end of the double-way pipe.

[0006] In a preferred solution, two electric drive rods are fixedly connected to the side of the tooling support plate facing the lifting mounting plate, and the driving ends of the electric drive rods are fixedly connected to the bottom of the lifting mounting plate. The outside of the suction circular frame is fixedly connected to a limiting circular frame, and the inside of the limiting circular frame is connected to an adjusting tooth plate through a bearing, and arc grooves are equidistantly provided on the adjusting tooth plate.

[0007] In a preferred solution, the outside of the suction circular frame is fixedly connected to a mounting circular plate, and the mounting circular plate is located above the adjusting tooth plate, and sliding grooves are provided on the mounting circular plate at equal distances, and the interiors of the multiple sliding grooves are all slidably connected to adjusting sliders, and the sides of the multiple adjusting sliders away from the adjusting tooth plate are all connected to clamping blocks by bolts, and one side of the clamping block is abutted against one side of the rubber sealing circular frame, and the sides of the multiple adjusting sliders facing the adjusting tooth plate are all fixedly connected to a pushing cylinder, and the pushing cylinder is located inside the arc groove.

[0008] In a preferred solution, a second circular hole is opened on one side of the lifting mounting plate, and the interior of the second circular hole is connected to a thin rod through a bearing, and the outside of the thin rod is fixedly connected to an adjusting gear, and a driving motor is arranged on the side of the lifting mounting plate facing the tooling support plate, and the driving end of the driving motor is connected to one end of the thin rod through a coupling.

[0009] In a preferred solution, an oil-gas ratio controller is fixedly connected to one side of the interior of the fuel dispenser body, and the inlet end of the oil-gas ratio controller is fixedly connected to one end of the oil-gas recovery pipe. A condensate tank is provided at the inner bottom of the fuel dispenser body, and a recovery pump is provided above the condensate tank. The oil-gas discharge end pipeline of the recovery pump passes through the condensate tank.

[0010] By providing a detection module, during the refueling process, the recovery pump is started, and the recovery round frame is used to recover the oil and gas generated during oil transportation through the recovery pump, and the oil and gas are condensed and stored through the condensation box. After refueling, the detection valve on the oil and gas recovery pipe is opened, and the electric drive rod is started. The rubber sealing round frame on the lifting mounting plate is driven by the electric drive rod to slide to the outside of the detection end of the oil and gas recovery pipe, and then the drive motor is started, and the drive motor drives the adjustment gear to rotate, and the adjustment gear drives the adjustment gear plate to rotate in a circle. At this time, the arc groove on the adjustment gear plate drives the push cylinder to move the adjustment slider in the slide groove on the installation circular plate, so that the clamping blocks on the multiple adjustment sliders clamp and tighten the rubber sealing round frame, and then the vacuum pump is started, and the gas in the oil and gas recovery pipe is evacuated by the vacuum pump, and then the pressure in the oil and gas recovery pipe is monitored by the pressure detector. When the pressure changes, it means that the oil and gas recovery pipe has a leak and needs to be replaced and repaired. Through the detection module, the air tightness detection device is connected to the main pipe by tightening it to avoid falling off and leakage, thereby avoiding errors in the detection results.

[0011] In a preferred embodiment, a hollow dust suction frame is fixedly connected to the outside of the fuel dispenser body, and dust suction holes are equidistantly provided on one end of the hollow dust suction frame facing the recovery circular frame, and circular holes three are provided on both sides of the hollow dust suction frame, and metal regulating tubes are fixedly connected to the inside of the two circular holes three, and dust suction heads are fixedly connected to one end of the two metal regulating tubes.

[0012] In a preferred embodiment, a dust pump is provided on the outside of the fuel dispenser body, and the dust suction end of the dust pump is connected to the inside of the hollow dust suction frame through a dust suction pipe. A dust collecting box is fixedly connected to one side of the fuel dispenser body, and the discharge end of the dust pump is connected to the inside of the dust collecting box through a dust discharge pipe.

[0013] A hollow dust suction frame, a metal adjustment tube, a dust suction head, a dust suction pump and a dust collection box are provided. When the device is not in use, the dust suction pump is started to absorb dust in the air above the detection module through the dust suction holes on the hollow dust suction frame, and then uniformly discharge it into the dust collection box to prevent dust from contaminating the detection module and affecting its use effect. At the same time, the dust suction direction of the dust suction head is adjusted through the metal adjustment tube to expand the range of dust suction.

[0014] In a preferred embodiment, a circular hole four is opened on the side of the fuel dispenser body, and a delivery pipe is fixedly connected to the inside of the circular hole four, one end of the delivery pipe is fixedly connected to the oil delivery pipe, a flow meter is fixedly connected to one side of the interior of the fuel dispenser body, and one side of the flow meter is fixedly connected to the other end of the delivery pipe.

[0015] In a preferred embodiment, an oil pump is fixedly connected to one side of the interior of the fuel dispenser body, and the oil outlet of the oil pump is fixedly connected to the interior of the flow meter through a connecting pipe, and a transparent observation cover is connected to one side of the fuel dispenser body through a hinge.

[0016] A method for using an air tightness detection device for oil and gas recovery, using the air tightness detection device for oil and gas recovery as described above, comprises the following steps:

[0017] Step 1: During the refueling process, the recovery pump is started, and the recovery frame is used to recover the oil and gas produced during the oil transportation, and the oil and gas are condensed and stored in the condensation box;

[0018] Step 2: After refueling, open the detection valve on the oil and gas recovery pipe, start the electric drive rod, and drive the rubber sealing round frame on the lifting mounting plate to slide outside the detection end of the oil and gas recovery pipe through the electric drive rod;

[0019] Step 3, then start the driving motor, drive the adjusting gear to rotate through the driving motor, and the adjusting gear drives the adjusting tooth plate to rotate in a circle. At this time, the arc groove on the adjusting tooth plate drives the pushing cylinder to make the adjusting slider move in the slide groove on the mounting circular plate, so that the clamping blocks on the multiple adjusting sliders clamp and tighten the rubber sealing circular frame;

[0020] Step 4: Then start the vacuum pump to evacuate the gas in the oil and gas recovery pipe through the vacuum pump, and then monitor the pressure in the oil and gas recovery pipe through the pressure detector.

[0021] As can be seen from the above, the air tightness detection device for oil and gas recovery provided by the present invention has the beneficial effect of avoiding falling off and leakage when the air tightness detection device is connected to the main pipe by tightening it, thereby avoiding errors in the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of an air tightness detection device for oil and gas recovery proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of an oil and gas recovery air tightness detection device proposed by the present invention from a bottom view;

[0024] Figure 3 A schematic diagram of the internal structure of a fuel dispenser body of an air tightness detection device for oil and gas recovery proposed by the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of a detection module of an air tightness detection device for oil and gas recovery proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a detection module of an air tightness detection device for oil and gas recovery proposed by the present invention;

[0027] Figure 6 This is an exploded schematic diagram of the structure of a detection module of an air tightness detection device for oil and gas recovery proposed by the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of a hollow dust suction frame of an air tightness detection device for oil and gas recovery proposed by the present invention.

[0029] In the figure: 1. fuel dispenser body; 2. transparent observation cover; 3. oil pipeline; 4. delivery pipe; 5. flow meter; 6. connecting pipe; 7. oil pump; 8. detection module; 801. pressure detector; 802. vacuum pump; 803. two-way pipe; 804. metal telescopic pipe 1; 805. tooling support plate; 806. electric drive rod; 807. lifting installation plate; 808. drive motor; 809. adjustment gear; 810. suction round frame; 811. adjustment tooth plate; 812. arc groove; 81 3. Install the circular plate; 814. Adjust the slider; 815. Push the cylinder; 816. Clamp the block; 817. Rubber seal circular frame; 818. Metal telescopic tube 2; 819. Oil and gas recovery pipe; 820. Air flow sensor; 821. Connecting pipe; 822. Recovery circular frame; 823. Detection valve; 824. Oil and gas ratio controller; 825. Recovery pump; 826. Condensation box; 9. Hollow dust suction frame; 10. Metal adjustment tube; 11. Dust suction head; 12. Dust collection box; 13. Dust suction pump. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] The present invention discloses an air tightness detection device for oil and gas recovery, which is mainly used in scenarios where the air tightness detection device needs to be connected to a main pipe when in use. Since the existing connection method is relatively simple and prone to falling off and leakage, errors may occur in the detection results.

[0032] Reference Figure 1-Figure 6A gas tightness detection device for oil and gas recovery includes a fuel dispenser body 1, on which a detection module 8 is arranged, and the detection module 8 includes a lifting installation plate 807 and a tooling support plate 805, a mounting circular hole is opened on one side of the fuel dispenser body 1, and an oil and gas recovery pipe 819 is fixedly connected inside the mounting circular hole, and a detection valve 823 is connected to the detection end of the oil and gas recovery pipe 819 through a flange, and one end of the oil and gas recovery pipe 819 is fixedly connected to a metal telescopic pipe 818, and one end of the metal telescopic pipe 818 is fixedly connected to an air flow sensor 820, and the air flow sensor 820 has two connecting pipes 821 fixedly connected to the suction end, and one end of the two connecting pipes 821 is fixedly connected to the same recovery circular frame 822, and the lifting installation A mounting circular opening is provided on the mounting plate 807, and a suction circular frame 810 is fixedly connected inside the mounting circular opening, and a rubber sealing circular frame 817 is fixedly connected to the suction end of the suction circular frame 810, and the rubber sealing circular frame 817 is attached to the outer wall of the detection end of the oil and gas recovery pipe 819. A circular hole 1 is provided on the side of the fuel dispenser body 1, and a two-way pipe 803 is fixedly connected inside the circular hole 1, and a metal telescopic pipe 804 is fixedly connected to one end of the two-way pipe 803, and one end of the metal telescopic pipe 804 is fixedly connected to the air outlet end of the suction circular frame 810. A vacuum pump 802 and a pressure detector 801 are fixedly connected to the inner bottom of the fuel dispenser body 1, and the suction end of the vacuum pump 802 and the detection end of the pressure detector 801 are respectively connected to one end of the two-way pipe 803.

[0033] Reference Figure 1-Figure 6 Two electric drive rods 806 are fixedly connected to one side of the tooling support plate 805 facing the lifting installation plate 807, and the driving end of the electric drive rod 806 is fixedly connected to the bottom of the lifting installation plate 807. The outside of the suction circular frame 810 is fixedly connected to a limited position circular frame, and the inside of the limited position circular frame is connected to an adjusting tooth plate 811 through a bearing, and arc grooves 812 are opened at equal distances on the adjusting tooth plate 811.

[0034] Reference Figure 1-Figure 6 The outside of the suction circular frame 810 is fixedly connected with a mounting circular plate 813, and the mounting circular plate 813 is located above the adjusting tooth plate 811. Slide grooves are opened at equal distances on the mounting circular plate 813, and the interiors of multiple slide grooves are slidably connected with adjusting sliders 814. The sides of multiple adjusting sliders 814 away from the adjusting tooth plate 811 are all connected with clamping blocks 816 by bolts, and one side of the clamping block 816 is against one side of the rubber sealing circular frame 817. The sides of multiple adjusting sliders 814 facing the adjusting tooth plate 811 are fixedly connected with pushing cylinders 815, and the pushing cylinders 815 are located inside the arc groove 812.

[0035] Reference Figure 1-Figure 6A second circular hole is provided on one side of the lifting installation plate 807, and the inside of the second circular hole is connected to a thin rod through a bearing, and the outside of the thin rod is fixedly connected to an adjusting gear 809. A driving motor 808 is provided on the side of the lifting installation plate 807 facing the tooling support plate 805, and the driving end of the driving motor 808 is connected to one end of the thin rod through a coupling.

[0036] Reference Figure 1-Figure 6 An oil-gas ratio controller 824 is fixedly connected to one side of the interior of the fuel dispenser body 1, and the inlet end of the oil-gas ratio controller 824 is fixedly connected to one end of the oil-gas recovery pipe 819. A condensation tank 826 is provided at the inner bottom of the fuel dispenser body 1, and a recovery pump 825 is provided above the condensation tank 826. The oil-gas discharge end pipeline of the recovery pump 825 passes through the condensation tank 826.

[0037] In a specific application scenario, during the refueling process, the recovery pump 825 is started, and the recovery round frame 822 is used to recover the oil and gas produced during the oil delivery, and the oil and gas are condensed and stored through the condensation box 826. After the refueling is completed, the detection valve 823 on the oil and gas recovery pipe 819 is opened, and the electric drive rod 806 is started. The rubber sealing round frame 817 on the lifting installation plate 807 is driven by the electric drive rod 806 to slide to the outside of the detection end of the oil and gas recovery pipe 819, and then the drive motor 808 is started, and the drive motor 808 drives The adjusting gear 809 rotates, and the adjusting gear 809 drives the adjusting tooth plate 811 to rotate in a circle. At this time, the arc groove 812 on the adjusting tooth plate 811 drives the pushing cylinder 815 to make the adjusting slider 814 move in the slide groove on the mounting circular plate 813, so that the clamping blocks 816 on the multiple adjusting sliders 814 clamp and tighten the rubber sealing circular frame 817, and then start the vacuum pump 802, and the gas in the oil and gas recovery pipe 819 is evacuated by the vacuum pump 802, and then the pressure in the oil and gas recovery pipe 819 is monitored by the pressure detector 801.

[0038] Reference Figure 1 and Figure 7 A hollow dust suction frame 9 is fixedly connected to the outside of the fuel dispenser body 1, and dust suction holes are equidistantly provided at one end of the hollow dust suction frame 9 facing the recovery circular frame 822. Circular holes three are provided on both sides of the hollow dust suction frame 9, and metal regulating tubes 10 are fixedly connected to the inside of the two circular holes three, and dust suction heads 11 are fixedly connected to one end of the two metal regulating tubes 10.

[0039] Reference Figure 1 and Figure 7 A dust suction pump 13 is provided on the outside of the fuel dispenser body 1, and the dust suction end of the dust suction pump 13 is connected to the inside of the hollow dust suction frame 9 through a dust suction pipe. A dust collecting box 12 is fixedly connected to one side of the fuel dispenser body 1, and the discharge end of the dust suction pump 13 is connected to the inside of the dust collecting box 12 through a dust discharge pipe.

[0040] In a specific application scenario, when the device is not in use, start the dust suction pump 13 to absorb dust in the air above the detection module 8 through the dust suction holes on the hollow dust suction frame 9, and then discharge it into the dust collecting box 12 to prevent dust from contaminating the detection module 8 and affecting its use effect. At the same time, the dust suction direction of the dust suction head 11 is adjusted through the metal adjustment tube 10 to expand the range of dust suction.

[0041] Reference Figure 1 , Figure 2 and Figure 3 A circular hole 4 is opened on the side of the fuel dispenser body 1, and a delivery pipe 4 is fixedly connected to the inside of the circular hole 4, one end of the delivery pipe 4 is fixedly connected to the oil delivery pipe 3, and a flow meter 5 is fixedly connected to one side of the inside of the fuel dispenser body 1, and one side of the flow meter 5 is fixedly connected to the other end of the delivery pipe 4.

[0042] Reference Figure 1 , Figure 2 and Figure 3 An oil pump 7 is fixedly connected to one side of the interior of the fuel dispenser body 1, and the oil outlet end of the oil pump 7 is fixedly connected to the interior of the flow meter 5 through a connecting pipe 6. A transparent observation cover 2 is connected to one side of the fuel dispenser body 1 through a hinge.

[0043] A method for using an air tightness detection device for oil and gas recovery, using the air tightness detection device for oil and gas recovery as described above, comprises the following steps:

[0044] Step 1: During the refueling process, the recovery pump 825 is started, and the recovery round frame 822 recovers the oil and gas produced during the oil transportation through the recovery pump 825, and the oil and gas are condensed and stored in the condensation box 826;

[0045] Step 2: After refueling, open the detection valve 823 on the oil and gas recovery pipe 819, start the electric drive rod 806, and drive the rubber sealing round frame 817 on the lifting installation plate 807 to slide outside the detection end of the oil and gas recovery pipe 819 through the electric drive rod 806;

[0046] Step 3, then start the driving motor 808, drive the adjusting gear 809 to rotate through the driving motor 808, and the adjusting gear 809 drives the adjusting tooth plate 811 to rotate in a circle, at this time, the arc groove 812 on the adjusting tooth plate 811 drives the pushing cylinder 815 to make the adjusting slider 814 move in the slide groove on the mounting circular plate 813, so that the clamping blocks 816 on the multiple adjusting sliders 814 clamp and tighten the rubber sealing circular frame 817;

[0047] Step 4: Then start the vacuum pump 802 to evacuate the gas in the oil and gas recovery pipe 819 through the vacuum pump 802, and then monitor the pressure in the oil and gas recovery pipe 819 through the pressure detector 801.

[0048] Working principle: When in use, the oil pump 7 is started to allow the oil pipeline 3 to refuel the vehicle. During the refueling process, the recovery pump 825 is started, and the recovery circular frame 822 is used to recover the oil and gas produced during the oil delivery. The oil and gas are condensed and stored through the condensation box 826. After refueling, the detection valve 823 on the oil and gas recovery pipe 819 is opened, and the electric drive rod 806 is started. The rubber sealing circular frame 817 on the lifting mounting plate 807 is driven by the electric drive rod 806 to slide to the outside of the detection end of the oil and gas recovery pipe 819, and then the drive motor 808 is started. The drive motor 808 drives the adjusting gear 809 to rotate, and the adjusting gear 809 drives the adjusting tooth plate 811 to rotate in a circle. At this time, the arc on the adjusting tooth plate 811 is adjusted. The groove 812 drives the pushing cylinder 815 to make the adjusting slider 814 move in the slide groove on the mounting circular plate 813, so that the clamping blocks 816 on the multiple adjusting sliders 814 clamp and tighten the rubber sealing circular frame 817, and then start the vacuum pump 802, and evacuate the gas in the oil and gas recovery pipe 819 through the vacuum pump 802, and then monitor the pressure in the oil and gas recovery pipe 819 through the pressure detector 801. When the device is not in use, start the dust suction pump 13, and absorb the dust in the air above the detection module 8 through the dust suction holes on the hollow dust suction frame 9, and then discharge it into the dust collecting box 12 to prevent dust from contaminating the detection module 8 and affecting its use effect. At the same time, the dust suction direction of the dust suction head 11 is adjusted through the metal adjustment tube 10 to expand the dust suction range.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air tightness detection device for oil and gas recovery, comprising a fuel dispenser body (1), characterized in that: The tanker body (1) is provided with a detection module (8), and the detection module (8) comprises a lifting installation plate (807) and a tooling support plate (805); a mounting circular hole is provided on one side of the tanker body (1), and an oil and gas recovery pipe (819) is fixedly connected to the inside of the mounting circular hole; a detection valve (823) is connected to the detection end of the oil and gas recovery pipe (819) via a flange; one end of the oil and gas recovery pipe (819) is fixedly connected to a second metal telescopic pipe (818); one end of the second metal telescopic pipe (818) is fixedly connected to an air flow sensor (820); and an air intake end of the air flow sensor (820) is fixedly connected to two connecting pipes (821); one end of the two connecting pipes (821) is fixedly connected to the same recovery circular frame (822); a mounting circular hole is provided on the lifting installation plate (807); A circular opening is provided, and a suction circular frame (810) is fixedly connected inside the circular opening. The suction end of the suction circular frame (810) is fixedly connected to a rubber sealing circular frame (817). The rubber sealing circular frame (817) is fitted to the outer wall of the detection end of the oil and gas recovery pipe (819). A circular hole 1 is provided on the side of the fuel dispenser body (1). A two-way pipe (803) is fixedly connected inside the circular hole 1. One end of the two-way pipe (803) is fixedly connected to a metal telescopic pipe 1 (804). One end of the metal telescopic pipe 1 (804) is fixedly connected to the air outlet end of the suction circular frame (810). A vacuum pump (802) and a pressure detector (801) are fixedly connected to the inner bottom of the fuel dispenser body (1). The suction end of the vacuum pump (802) and the detection end of the pressure detector (801) are respectively connected to one end of the two-way pipe (803).

2. The air tightness detection device for oil and gas recovery according to claim 1, characterized in that: Two electric drive rods (806) are fixedly connected to one side of the tooling support plate (805) facing the lifting installation plate (807), and the driving ends of the electric drive rods (806) are fixedly connected to the bottom of the lifting installation plate (807). The outside of the suction circular frame (810) is fixedly connected to a limit circular frame, and the inside of the limit circular frame is connected to an adjustment tooth plate (811) via a bearing, and arc grooves (812) are provided on the adjustment tooth plate (811) at equal distances.

3. The air tightness detection device for oil and gas recovery according to claim 2 is characterized in that: The outside of the suction circular frame (810) is fixedly connected to a mounting circular plate (813), and the mounting circular plate (813) is located above the adjusting tooth plate (811). Slide grooves are provided at equal intervals on the mounting circular plate (813), and the interiors of the plurality of slide grooves are slidably connected to adjusting sliders (814). The sides of the plurality of adjusting sliders (814) away from the adjusting tooth plate (811) are connected to clamping blocks (816) by bolts, and one side of the clamping blocks (816) is abutted against one side of the rubber sealing circular frame (817). The sides of the plurality of adjusting sliders (814) facing the adjusting tooth plate (811) are fixedly connected to pushing cylinders (815), and the pushing cylinders (815) are located inside the arc groove (812).

4. The air tightness detection device for oil and gas recovery according to claim 3 is characterized in that: A second circular hole is provided on one side of the lifting installation plate (807), and a thin rod is connected to the inside of the second circular hole via a bearing, and an adjusting gear (809) is fixedly connected to the outside of the thin rod. A driving motor (808) is provided on the side of the lifting installation plate (807) facing the tooling support plate (805), and a driving end of the driving motor (808) is connected to one end of the thin rod via a coupling.

5. The air tightness detection device for oil and gas recovery according to claim 4, characterized in that: An oil-gas ratio controller (824) is fixedly connected to one side of the interior of the fuel dispenser body (1), and an inlet end of the oil-gas ratio controller (824) is fixedly connected to one end of an oil-gas recovery pipe (819). A condensation tank (826) is provided at the bottom of the interior of the fuel dispenser body (1), and a recovery pump (825) is provided above the condensation tank (826). The oil-gas discharge end pipeline of the recovery pump (825) passes through the condensation tank (826).

6. The air tightness detection device for oil and gas recovery according to claim 5, characterized in that: The outside of the refueling machine body (1) is fixedly connected to a hollow dust suction frame (9), and dust suction holes are equidistantly provided at one end of the hollow dust suction frame (9) facing the recycling circular frame (822), and circular holes (3) are provided on both sides of the hollow dust suction frame (9), and metal regulating tubes (10) are fixedly connected to the inside of the two circular holes (3), and dust suction heads (11) are fixedly connected to one end of the two metal regulating tubes (10).

7. The air tightness detection device for oil and gas recovery according to claim 6, characterized in that: A dust suction pump (13) is arranged outside the fuel dispenser body (1), and a dust suction end of the dust suction pump (13) is connected to the inside of the hollow dust suction frame (9) via a dust suction pipe. A dust collecting box (12) is fixedly connected to one side of the fuel dispenser body (1), and a discharge end of the dust suction pump (13) is connected to the inside of the dust collecting box (12) via a dust discharge pipe.

8. The air tightness detection device for oil and gas recovery according to claim 7, characterized in that: A circular hole (4) is provided on the side of the fuel dispenser body (1), and a delivery pipe (4) is fixedly connected to the inside of the circular hole (4), one end of the delivery pipe (4) is fixedly connected to the oil delivery pipe (3), and a flow meter (5) is fixedly connected to one side of the inside of the fuel dispenser body (1), and one side of the flow meter (5) is fixedly connected to the other end of the delivery pipe (4).

9. The air tightness detection device for oil and gas recovery according to claim 8, characterized in that: An oil pump (7) is fixedly connected to one side of the interior of the fuel dispenser body (1), and an oil outlet end of the oil pump (7) is fixedly connected to the interior of a flow meter (5) via a connecting pipe (6). A transparent observation cover plate (2) is connected to one side of the fuel dispenser body (1) via a hinge.

10. A method for using an air tightness detection device for oil and gas recovery, using the air tightness detection device for oil and gas recovery according to claim 9, characterized in that: The steps include: Step 1: During the refueling process, the recovery pump (825) is started, and the recovery round frame (822) is used to recover the oil and gas generated during the oil transportation through the recovery pump (825), and the oil and gas are condensed and stored in the condensation box (826); Step 2: After refueling is completed, the detection valve (823) on the oil and gas recovery pipe (819) is opened, and the electric drive rod (806) is started, so that the rubber sealing round frame (817) on the lifting installation plate (807) is driven by the electric drive rod (806) to slide on the outside of the detection end of the oil and gas recovery pipe (819); Step 3, then start the driving motor (808), drive the adjusting gear (809) to rotate through the driving motor (808), and the adjusting gear (809) drives the adjusting tooth plate (811) to rotate in a circle. At this time, the arc groove (812) on the adjusting tooth plate (811) drives the pushing cylinder (815) to make the adjusting slider (814) move in the sliding groove on the mounting circular plate (813), so that the clamping blocks (816) on the multiple adjusting sliders (814) clamp and tighten the rubber sealing circular frame (817); Step 4: Then start the vacuum pump (802), evacuate the gas in the oil and gas recovery pipe (819) through the vacuum pump (802), and then monitor the pressure in the oil and gas recovery pipe (819) through the pressure detector (801).

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