Detection device for oil gas recovery system of gas station

Abstract

The invention relates to a gas station oil gas recovery system detection device which comprises an adapter, a pipeline structure, a sensor locking device and a gas supplementing hole plugging device, the adapter is provided with a second gas channel and an assembly cavity, the assembly cavity is communicated with the second gas channel and penetrates through the adapter, and a locking fixing structure used for being matched with an oil gun nozzle is arranged in the assembly cavity. A first sealing structure in sealing fit with the oil gun nozzle is arranged on the cavity wall of the assembly cavity, the pipeline structure comprises a three-way pipe, a three-way reversing valve, a first connecting pipe and a second connecting pipe which are sequentially connected, the three-way pipe is connected with the adapter, and the inner diameter of the first connecting pipe is smaller than that of the second connecting pipe, the three-way pipe and the three-way reversing valve; and the sensor locking device and the air supply hole plugging device are respectively arranged on the adapter. The detection device can accurately measure the gas-liquid ratio of the ORVR oil gun in two different working modes, and solves the technical problem that manual detection of the ORVR working mode cannot be realized in traditional secondary oil gas recovery at present.

Description

Technical Field

[0001] The present invention relates to the technical field of refueling equipment, and particularly to a detection device for a gas-vapor recovery system at a gas station. Background Art

[0002] The refueling vapor recovery system is an important part of modern gas station environmental protection technology, aiming to reduce the emission of volatile organic compounds (VOCs) during the refueling process. VOCs are one of the main sources of air pollution and are harmful to the environment and human health. During the traditional refueling process, gasoline vapor escapes from the fuel tank and is directly discharged into the atmosphere. To reduce this pollution, a vapor recovery system is introduced to reduce the vapor emission during refueling.

[0003] Currently, the vapor recovery system mainly includes two types, namely Stage I and Stage II. Among them, the Stage I type recovers gasoline vapor when the tanker unloads oil into the underground storage tank, and the Stage II type recovers the gasoline vapor discharged from the fuel tank when the vehicle is refueling. The Onboard Refueling Vapor Recovery (ORVR) system is an upgraded version of the Stage II type, that is, the design of the national VI vehicle emissions adds an activated carbon canister, which greatly reduces the daytime volatile emissions of the vehicle and the vapor emission during the refueling process. The activated carbon canister of the vehicle adsorbs the gasoline vapor, greatly improving the vapor recovery efficiency in the Stage II stage. The popularization of the ORVR system poses new requirements for the design and testing of the fuel nozzle, especially the measurement and control of the vapor-to-liquid ratio (V / L).

[0004] The detection of the vapor-to-liquid ratio (V / L) is a key indicator for evaluating the performance of the vapor recovery system. The vapor-to-liquid ratio refers to the ratio of the volume of gasoline vapor recovered during refueling to the volume of fuel dispensed. However, due to the differences in the structure and working mode between the ORVR fuel nozzle of the ORVR system and the traditional fuel nozzle, the current detection device for the gas-vapor recovery system at a gas station does not consider the performance evaluation of the ORVR fuel nozzle under ORVR conditions and cannot achieve the detection of the vapor-to-liquid ratio under ORVR conditions, affecting the system performance evaluation. Summary of the Invention

[0005] The purpose of the present invention is to provide a detection device for a gas-vapor recovery system at a gas station, enabling the detection of the vapor-to-liquid ratio under ORVR conditions and improving the detection accuracy of the vapor-to-liquid ratio of the ORVR fuel nozzle.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A detection device for a gas recovery system at a gas station, adapted to an ORVR fueling nozzle. The ORVR fueling nozzle includes a nozzle body, a gas hood located on the nozzle body, a fuel nozzle, and an ORVR sensor. The gas hood is sleeved outside the fuel nozzle, and a first gas passage is formed between the gas hood and the fuel nozzle. The gas hood is provided with a compensation air hole communicating with the first gas passage. The detection device for the gas recovery system at the gas station includes:

[0008] An adapter provided with a second gas passage and an assembly cavity. The assembly cavity communicates with the second gas passage and penetrates through the adapter. A locking and fixing structure for cooperating with the fuel nozzle is arranged in the assembly cavity. The cavity wall at one end of the assembly cavity away from the second gas passage is provided with a first sealing structure for sealing cooperation with the fuel nozzle. The second gas passage is used for sealing communication with the first gas passage when the adapter and the fuel nozzle are assembled in place;

[0009] A pipeline structure including a tee, a three-way reversing valve, a first connecting pipe, and a second connecting pipe. The three-way reversing valve is connected to the adapter through the tee. The outlet of the tee communicates with the second gas passage. The first inlet of the tee communicates with the first outlet of the three-way reversing valve. The second inlet of the tee communicates with the second outlet of the three-way reversing valve through the first connecting pipe. The inlet of the three-way reversing valve is connected to the second connecting pipe. The inlet of the three-way reversing valve can be selectively communicated with the first outlet and the second outlet of the three-way reversing valve. The inner diameter of the first connecting pipe is smaller than the inner diameters of the second connecting pipe, the tee, and the three-way reversing valve;

[0010] A sensor locking device and a compensation air hole blocking device, respectively arranged on the adapter.

[0011] In an embodiment of the present application, the locking and fixing structure includes:

[0012] At least two coaxially arranged sleeve parts for sleeving on the fuel nozzle;

[0013] A locking member, the position of which is adjustable on the adapter to extend into the assembly cavity to lock the fuel nozzle sleeved in each of the sleeve parts.

[0014] In an embodiment of the present application, the locking member is a locking bolt. A locking hole communicating with the assembly cavity is arranged on the adapter. The locking hole has a smooth hole section and a threaded section. The locking bolt is in threaded cooperation with the threaded section, and a second sealing structure is arranged between the locking bolt and the smooth hole section.

[0015] In an embodiment of the present application, the first sealing structure is a first sealing ring. The adapter includes:

[0016] A main body, wherein the second gas channel and the assembly cavity are arranged in the main body;

[0017] An assembly sleeve, wherein the assembly sleeve is coaxially arranged with the sleeve portion, the assembly sleeve is detachably connected to the main body and is located at an end of the assembly cavity away from the second gas channel, and the assembly sleeve cooperates with the main body to clamp the first sealing ring.

[0018] In one embodiment of the present application, a first annular step surface is provided on the inner wall of the assembly sleeve, and the first annular step surface cooperates with the sleeve portion to clamp the first sealing ring.

[0019] In one embodiment of the present application, a second annular step surface is arranged on the outer wall of the assembly sleeve, the cavity wall of the assembly cavity is arranged with a third annular step surface corresponding to the second annular step surface, and a second sealing ring is arranged between the outer wall of the assembly sleeve and the cavity wall of the assembly cavity and / or between the second annular step surface and the third annular step surface.

[0020] In one embodiment of the present application, the second gas channel includes an air inlet channel and an air outlet channel arranged at an angle to each other, the air inlet channel is connected to the air outlet channel through the assembly cavity, the assembly cavity and the air outlet channel extend in the same direction and are connected, and the side of the sleeve portion facing the air outlet channel is provided with a guide cone surface for facilitating the oil gun nozzle to pass through the sleeve portion.

[0021] In one embodiment of the present application, the sensor locking device is a magnet.

[0022] In one embodiment of the present application, the sensor locking device further includes a binding strap, the magnet is disposed on the binding strap, and the binding strap is disposed on the adapter via a first chain.

[0023] In one embodiment of the present application, the air-supply hole sealing device is a sealing pin adapted to the air-supply hole, and the sealing pin is arranged on the adapter through a second chain.

[0024] It can be seen from the above technical scheme that the present invention discloses a gas station oil and gas recovery system detection device, which is used to be adapted to an ORVR fueling gun. The ORVR fueling gun includes a gun body, an air hood located on the gun body, an oil gun nozzle and an ORVR sensor. The air hood is sleeved on the outside of the oil gun nozzle, and a first gas channel is formed between the air hood and the oil gun nozzle. The air hood is provided with an air filling hole connected to the first gas channel.

[0025] The detection device for the oil and gas recovery system of the gas station includes an adapter, a pipeline structure, a sensor locking device, and a supplementary air hole plugging device. Among them, the adapter is provided with a second gas channel and an assembly cavity. The assembly cavity is communicated with the second gas channel and penetrates through the adapter. A locking and fixing structure for cooperating with the nozzle of the oil gun is arranged in the assembly cavity. The cavity wall at one end of the assembly cavity away from the second gas channel is provided with a first sealing structure for sealing cooperation with the nozzle of the oil gun. The second gas channel is used for sealing communication with the first gas channel when the adapter and the nozzle of the oil gun are assembled in place.

[0026] The pipeline structure includes a tee, a three-way reversing valve, a first connecting pipe, and a second connecting pipe. The three-way reversing valve is connected to the adapter through the tee. The outlet of the tee is communicated with the second gas channel. The first inlet of the tee is communicated with the first outlet of the three-way reversing valve. The second inlet of the tee is communicated with the second outlet of the three-way reversing valve through the first connecting pipe. The inlet of the three-way reversing valve is connected to one end of the second connecting pipe. The inlet of the three-way reversing valve can be selectively communicated with the first outlet and the second outlet of the three-way reversing valve. The inner diameter of the first connecting pipe is smaller than the inner diameters of the second connecting pipe, the tee, and the three-way reversing valve. The sensor locking device and the supplementary air hole plugging device are respectively arranged on the adapter. The other end of the second connecting pipe is connected to the air-liquid ratio detection device. The air-liquid ratio detection device includes, but is not limited to, a Roots flowmeter.

[0027] During use, the above-mentioned adapter is sleeved on the nozzle of the ORVR fuel gun, and the nozzle of the oil gun is inserted from one end of the adapter and passes through to the other end until the locking and fixing structure contacts the anchor ring on the nozzle of the oil gun. At this time, it indicates that the adapter is assembled in place. The adapter contacts the end of the gas hood away from the gun body and has a certain squeezing effect on the gas hood to achieve the sealing docking between the second gas channel of the adapter and the first gas channel of the gas hood. Then, the pipeline structure is connected to the adapter. Finally, the locking and fixing structure is operated to lock and fix the adapter and the nozzle of the oil gun, so that the sensor locking device locks the ORVR sensor, ensuring that the ORVR sensor always remains in a fully open state regardless of the refueling angle of the ORVR fuel gun, thereby ensuring the accuracy and reliability of the test data. And the supplementary air hole plugging device plugs the supplementary air hole on the gas hood to avoid air intake here from affecting the detection accuracy.

[0028] After the assembly is completed, the nozzle of the ORVR refueling gun is inserted into the test tank through the end of the adapter, the second connecting pipe is connected to the gas-liquid ratio detection equipment, the ORVR refueling gun is operated to start refueling, and at the same time, the exhaust device of the oil and gas recovery system of the gas station is started to extract gas. The exhaust device forms a negative pressure in the second gas channel in the adapter through the first gas channel of the gas hood, and then forms a negative pressure in the entire pipeline structure. Under the action of the internal and external pressure difference, the external airflow enters from the gas-liquid ratio detection equipment, and passes through the pipeline structure, the second gas channel and the first gas channel in turn. In this process, the gas-liquid ratio detection equipment detects the airflow flow passing through a preset time period, and then converts it into gas volume according to the detected airflow flow, and compares it with the fuel added by the ORVR refueling gun in the same time period to obtain the gas-liquid ratio.

[0029] In the above process, the measurement of the ORVR working mode and the non-ORVR working mode of the ORVR refueling gun can be achieved by adjusting the three-way reversing valve. That is, in the ORVR working mode, the gas-liquid ratio of the ORVR refueling gun is ≤0.5, that is, the amount of recovered gas is small, the first outlet of the three-way reversing valve is disconnected from the inlet, and the second outlet is connected to the inlet, and the air flow enters the three-way pipe through the three-way reversing valve and the first connecting pipe with a smaller diameter. In the non-ORVR working mode, the gas-liquid ratio of the ORVR refueling gun is between 1.0 and 1.2, and the amount of recovered gas is large. The second outlet of the three-way reversing valve is disconnected from the inlet, and the first outlet is connected to the inlet. The air flow directly enters the three-way pipe through the three-way reversing valve without passing through the first connecting pipe. By controlling the three-way reversing valve, the gas-liquid ratio of the ORVR refueling gun in two different working modes can be accurately measured, which solves the technical problem that the current traditional secondary oil and gas recovery cannot realize manual detection of the ORVR working mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A partial structural cross-sectional view of a gas station oil and gas recovery system detection device provided by an embodiment of the present invention;

[0032] Figure 2 A partial exploded view of a gas station oil and gas recovery system detection device provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of a partial assembly of a gas station oil and gas recovery system detection device provided by an embodiment of the present invention;

[0034] Figure 4 The figure is an assembly schematic diagram of the detection device for the gas and oil recovery system of a gas station provided by an embodiment of the present invention and an ORVR fueling gun.

[0035] In the figure:

[0036] 100 is an adapter; 110 is a main body; 120 is a fitting set; 130 is a second gas channel; 131 is an air outlet channel; 132 is an air inlet channel; 140 is an assembly cavity; 150 is a sleeved part; 160 is a first sealing ring; 170 is a second sealing ring; 180 is a locking bolt;

[0037] 200 is a pipeline structure; 210 is a tee; 220 is a three-way reversing valve; 230 is a first connecting pipe; 240 is a first connecting joint; 250 is a second connecting joint; 260 is a reducing joint;

[0038] 300 is a sensor locking device; 310 is a magnet; 320 is a binding band;

[0039] 400 is a sealing pin; 410 is a pin body part; 420 is an insertion part;

[0040] 500 is a first chain; 600 is a second chain

[0041] 700 is an ORVR fueling gun; 710 is a gun body; 720 is a nozzle; 730 is a gas hood; 740 is an anchor ring. Specific embodiments

[0042] The core of the present invention is to provide a detection device for the gas and oil recovery system of a gas station. The structural design of the detection device for the gas and oil recovery system of a gas station enables the detection of the gas-liquid ratio under ORVR conditions and improves the detection accuracy of the gas-liquid ratio of the ORVR fueling gun.

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] Please refer to Figures 1 to 4 , Figure 1 which is a partial structural cross-sectional view of the detection device for the gas and oil recovery system of a gas station provided by an embodiment of the present invention, Figure 2 which is a partial exploded view of the detection device for the gas and oil recovery system of a gas station provided by an embodiment of the present invention, Figure 3 which is a partial assembly schematic diagram of the detection device for the gas and oil recovery system of a gas station provided by an embodiment of the present invention, Figure 4Schematic assembly diagram of the detection device for the gas recovery system of a gas station provided in an embodiment of the present invention and an ORVR fueling nozzle.

[0045] An embodiment of the present invention discloses a detection device for a gas recovery system of a gas station. The detection device for the gas recovery system of the gas station is adapted to an ORVR fueling nozzle 700. The ORVR fueling nozzle 700 includes a nozzle body 710, a gas hood 730 located on the nozzle body 710, a fuel nozzle 720, and an ORVR sensor. The gas hood 730 is sleeved outside the fuel nozzle 720. A first gas passage is formed between the gas hood 730 and the fuel nozzle 720. The gas hood 730 is provided with an air inlet and a compensation hole communicating with the first gas passage. The air inlet is located at one end of the gas hood 730 away from the nozzle body 710 and is used to communicate the first gas passage with the following second gas passage 130. The detection device for the gas recovery system of the gas station includes an adapter 100, a pipeline structure 200, a sensor locking device 300, and a compensation hole plugging device.

[0046] Among them, the adapter 100 is provided with a second gas passage 130 and an assembly cavity 140. The assembly cavity 140 communicates with the second gas passage 130 and penetrates through the adapter 100. A locking and fixing structure for cooperating with the fuel nozzle 720 is arranged in the assembly cavity 140. A first sealing structure for sealingly cooperating with the fuel nozzle 720 is arranged on the cavity wall at one end of the assembly cavity 140 away from the second gas passage 130. The second gas passage 130 is used to be sealingly communicated with the first gas passage when the adapter 100 and the fuel nozzle 720 are assembled in place.

[0047] As Figure 2 and Figure 3 shown, the pipeline structure 200 includes a three-way pipe 210, a three-way reversing valve 220, a first connecting pipe 230, and a second connecting pipe. The three-way reversing valve 220 is connected to the adapter 100 through the three-way pipe 210. The outlet a1 of the three-way pipe 210 communicates with the second gas passage 130. The first inlet a2 of the three-way pipe 210 is communicated with the first outlet b2 of the three-way reversing valve 220 through a first connecting joint 240. The second inlet a3 of the three-way pipe 210 is communicated with the second outlet b3 of the three-way reversing valve 220 through the first connecting pipe 230 and a reducing joint 260 located at both ends of the first connecting pipe 230. The inlet b1 of the three-way reversing valve 220 is connected to one end of a second connecting pipe (not shown in the figure) through a second connecting joint 250. The inlet b1 of the three-way reversing valve 220 can be selectively communicated with the first outlet b2 and the second outlet b3 of the three-way reversing valve 220. The inner diameter of the first connecting pipe 230 is smaller than the inner diameters of the second connecting pipe, the three-way pipe 210, and the three-way reversing valve 220; the other end of the second connecting pipe is used to connect a gas-liquid ratio detection device. The gas-liquid ratio detection device includes, but is not limited to, a Roots flowmeter; the sensor locking device 300 and the compensation hole plugging device are respectively arranged on the adapter 100.

[0048] Compared with the prior art, the gas station oil and gas recovery system detection device provided by the embodiment of the present invention is used, such as Figure 4 As shown, the adapter 100 is mounted on the oil gun nozzle 720 of the ORVR refueling gun 700, and the oil gun nozzle 720 is inserted from one end of the adapter 100 and passed out from the other end until the locking and fixing structure contacts the anchor ring 740 on the oil gun nozzle 720. At this time, it indicates that the adapter 100 is assembled in place, and the adapter 100 contacts the end of the gas hood 730 away from the gun body 710, and has a certain squeezing effect on the gas hood 730, so as to achieve a sealed docking between the second gas channel 130 of the adapter 100 and the first gas channel of the gas hood 730, and then the pipeline structure 200 is connected to the adapter 100, and finally the locking and fixing structure is operated to lock and fix the adapter 100 and the oil gun nozzle 720, so that the sensor locking device 300 locks the ORVR sensor, ensuring that the ORVR refueling gun 700 always keeps a fully open state no matter from which angle the ORVR refueling gun 700 is refueled, thereby ensuring the accuracy and reliability of the test data, and the air filling hole blocking device blocks the air filling hole on the gas hood 730 to prevent the air intake here from affecting the detection accuracy.

[0049] After the assembly is completed, the end of the oil gun nozzle 720 of the ORVR fueling gun 700 passing through the adapter 100 is inserted into the test tank, the second connecting pipe is connected to the gas-liquid ratio detection device, the ORVR fueling gun 700 is operated to start refueling, and at the same time, the exhaust device of the oil and gas recovery system of the gas station is started to extract gas. The exhaust device forms a negative pressure in the second gas channel 130 in the adapter 100 through the first gas channel of the gas hood 730, and then forms a negative pressure in the entire pipeline structure 200. Under the action of the internal and external pressure difference, the external airflow enters from the gas-liquid ratio detection device, and passes through the pipeline structure 200, the second gas channel 130 and the first gas channel in sequence. In this process, the gas-liquid ratio detection device detects the airflow flow passing through a preset time period, and then converts the detected airflow flow into gas volume, which is compared with the fuel added by the ORVR fueling gun 700 in the same time period to obtain the gas-liquid ratio.

[0050] In the above process, by adjusting the three-way reversing valve 220, the measurement of two modes of the ORVR working mode and the non-ORVR working mode of the ORVR fueling gun 700 can be achieved. That is, in the ORVR working mode, the air-liquid ratio of the ORVR fueling gun 700 ≤ 0.5, that is, the recovered gas volume is small. The first outlet b2 of the three-way reversing valve 220 is disconnected from the inlet b1, and the second outlet b3 is communicated with the inlet b1. The air flow passes through the three-way reversing valve 220 and the thinner first connecting pipe 230 and enters the second inlet a3 of the three-way pipe 210. In the non-ORVR working mode, the air-liquid ratio of the ORVR fueling gun 700 is between 1.0 and 1.2, and the recovered gas volume is large. The second outlet b3 of the three-way reversing valve 220 is disconnected from the inlet b1, and the first outlet b2 is communicated with the inlet b1. The air flow directly enters the first inlet a2 of the three-way pipe 210 through the three-way reversing valve 220, passes through the outlet a1 of the three-way pipe 210 and enters the second gas channel, without passing through the first connecting pipe 230. By controlling the three-way reversing valve 220, the accurate measurement of the air-liquid ratio of the ORVR fueling gun 700 in two different working modes can be realized, solving the technical problem that the traditional secondary oil and gas recovery currently cannot realize the manual detection of the ORVR working mode.

[0051] Please refer to Figure 1 , in an embodiment of the present application, the locking and fixing structure includes a locking member and at least two sleeving parts 150. The sleeving parts 150 are coaxially arranged and each has a through hole for the fueling nozzle 720 to pass through. The sleeving parts 150 are used for sleeving on the fueling nozzle 720. The locking member is adjustably arranged on the adapter 100 to extend into the assembly cavity 140 to lock the fueling nozzle 720 sleeved in each sleeving part 150. That is, when the fueling nozzle 720 is in place in cooperation with the sleeving part 150, the locking member moves towards the fueling nozzle 720, so as to cooperate with the sleeving part 150 to lock and fix the fueling nozzle 720.

[0052] The locking member can be adjustably arranged on the adapter 100 in various ways. For example, the locking member can be in threaded cooperation with the adapter 100 and move relative to the adapter 100 by means of screw feed. Or a cam locking mechanism can be arranged between the locking member and the adapter 100. That is, the locking member can reciprocally slide through the through hole of the adapter 100. One end of the locking member extending out of the adapter 100 is connected to a cam. A shrinkage seam is arranged on the sleeving part 150. The sleeving part 150 can be elastically deformed to expand and contract the shrinkage seam. One end of the locking member located inside the adapter 100 sequentially passes through the part of the sleeving part 150 on one side of the shrinkage seam, the shrinkage seam and is fixed to the part of the sleeving part 150 on the other side of the shrinkage seam. In this way, when the cam rotates from the proximal end to the distal end, the locking member will pull the parts of the sleeving part 150 on both sides of the shrinkage seam closer to each other, so that the sleeving part 150 clamps the fueling nozzle 720.

[0053] Specifically, as Figure 1As shown, in an embodiment of the present application, the locking member is a locking bolt 180. A locking hole communicating with the assembly cavity 140 is provided on the adapter 100. The locking hole has a smooth hole section and a threaded section. The smooth hole section and the threaded section are arranged in sequence from the outside of the adapter 100 to the inside of the assembly cavity 140. The locking bolt 180 is in threaded cooperation with the threaded section. In order to increase the sealing performance between the locking bolt 180 and the adapter 100 and avoid leakage, a second sealing structure is provided between the locking bolt 180 and the smooth hole section.

[0054] To increase the stability of the locking bolt 180, as Figure 1 shown, a boss is provided on the inner wall and / or outer wall of the adapter 100. The locking hole penetrates through the boss to increase the axial length of the locking hole, thereby increasing the mating surface between the locking hole and the locking bolt 180 and improving the stability of the locking bolt 180.

[0055] Please refer to Figure 1 , in the present application, the first sealing structure is a first sealing ring 160. The adapter 100 includes a main body 110 and a fitting sleeve 120. Among them, the second gas passage 130 and the assembly cavity 140 are arranged in the main body 110. The fitting sleeve 120 is coaxially arranged with the sleeved portion 150. The fitting sleeve 120 is detachably connected to the main body 110. Different specifications of fitting sleeves 120 can be replaced to adapt to different test tanks. And it is located at one end of the assembly cavity 140 away from the second gas passage 130. The fitting sleeve 120 and the main body 110 cooperate to clamp the first sealing ring 160. The first sealing ring 160 is used for contact cooperation with the oil gun nozzle 720, so as to form a seal between the adapter 100 and the oil gun nozzle 720. It should be noted that the first sealing structure may include one or more first sealing rings 160.

[0056] To further optimize the above technical solution, as Figure 1 shown, a first annular step surface is provided on the inner wall of the fitting sleeve 120. The first annular step surface and the sleeved portion 150 cooperate to clamp the first sealing ring 160, that is, the first annular step surface and the sleeved portion 150 limit the first sealing ring 160 on both sides in the axial direction to prevent it from axially moving with the insertion and extraction of the oil gun nozzle 720, ensuring that the first sealing ring 160 is always in the preset position and ensuring the seal between the adapter 100 and the oil gun nozzle 720 during assembly.

[0057] To avoid leakage between the fitting sleeve 120 and the adapter 100, as Figure 1As shown, a second annular step surface is provided on the outer wall of the fitting sleeve 120, and a third annular step surface corresponding to the second annular step surface is provided on the cavity wall of the fitting cavity 140. A second sealing ring 170 is provided between the outer wall of the fitting sleeve 120 and the cavity wall of the fitting cavity 140 and / or between the second annular step surface and the third annular step surface. By providing the second sealing ring 170, a seal can be formed between the outer wall of the fitting sleeve 120 and the cavity wall of the fitting cavity 140, preventing leakage between the fitting sleeve 120 and the adapter 100 and affecting the measurement accuracy.

[0058] The above-mentioned second sealing structure includes a third sealing ring. The locking bolt 180 includes a nut, a smooth rod portion, and a threaded portion arranged in sequence. The threaded portion is used for threaded cooperation with the threaded section of the locking hole, and the smooth rod portion has a clearance fit with the smooth hole section. A ring groove is provided on the smooth rod portion of the locking bolt 180 or the smooth hole section of the locking hole. The third sealing ring is partially embedded in the ring groove, and the locking bolt 180 cooperates with the hole wall of the locking hole to squeeze and deform the third sealing ring, achieving the seal between the locking bolt 180 and the locking hole.

[0059] Please continue to refer to Figure 1 , in an embodiment of the present application, the second gas passage 130 includes an intake passage 132 and an exhaust passage 131 arranged at an angle to each other. In Figure 1 the shown embodiment, the angle between the intake passage 132 and the exhaust passage 131 is 90° or approximately 90°. The intake passage 132 communicates with the exhaust passage 131 through the fitting cavity 140. The fitting cavity 140 extends in the same direction as the exhaust passage 131 and is connected. A guiding conical surface is provided on one side of the sleeve portion 150 facing the exhaust passage 131 to facilitate the oil gun nozzle 720 to pass through the sleeve portion 150. In this way, when the adapter 100 is installed on the ORVR fuel gun 700, the oil gun nozzle 720 penetrates from the exhaust end of the exhaust passage 131, passes through the sleeve portion 150, and then exits from one end of the fitting cavity 140 away from the second gas passage 130.

[0060] As Figure 1 and Figure 4As shown, in one embodiment of the present application, the sensor locking device 300 is a magnet 310. To facilitate the fixing of the magnet 310 to the adapter 100 and to the ORVR fueling gun 700, the sensor locking device 300 further includes a tie strap 320. The magnet 310 is disposed on the tie strap 320. The tie strap 320 is disposed on the adapter 100 through a first chain 500. When no detection is performed, the tie strap 320 is connected to the adapter 100 through the first chain 500, and the magnet 310 is fixed to the tie strap 320, so as to ensure that the magnet 310 will not be separated from and lost by the adapter 100. When detection is performed, the magnet 310 can be adsorbed on the gun body 710 of the ORVR fueling gun 700 corresponding to the position of the ORVR sensor, and then the tie strap 320 is tied to the gun body 710 to prevent the magnet 310 from falling off the gun body 710.

[0061] Please refer to Figure 1 and Figure 4 , the air vent plugging device is a sealing pin 400 adapted to the air vent. The sealing pin 400 is disposed on the adapter 100 through a second chain 600 to prevent the sealing pin 400 from being lost. The air vent plugging device may include one or more sealing pins 400, which are provided in a matching manner according to the number of air vents on the ORVR fueling gun 700 to be tested. When measuring, the sealing pin 400 is inserted into the air vent on the air hood 730 of the ORVR fueling gun 700. Therefore, the diameter of the insertion portion 420 of the sealing pin 400 should be slightly larger than the diameter of the air vent to ensure the sealing effect when the sealing pin 400 is inserted into the air vent. As Figure 1 can be seen, in this case, the sealing pin 400 includes a pin body portion 410 and an insertion portion 420 connected to the pin body portion 410. One end of the pin body portion 410 away from the insertion portion 420 is connected to the second chain 600. The diameter of the insertion portion 420 is smaller than the diameter of the pin body portion 410. A stop limiting step surface is formed between the insertion portion 420 and the pin body portion 410. When the sealing pin 400 is inserted until the stop limiting step surface contacts the air hood 730, it indicates that the sealing pin 400 is inserted in place.

[0062] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "one", "a kind of" and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0063] In the description of the present application, unless otherwise clearly defined, terms such as "setting", "installing", "connecting", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0064] It should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other.

[0065] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A detection device for a gas recovery system at a gas station, adapted to be matched with an ORVR fueling gun (700), the ORVR fueling gun (700) comprising a gun body (710), a gas hood (730) located on the gun body (710), a fuel nozzle (720), and an ORVR sensor, the gas hood (730) being sleeved outside the fuel nozzle (720), a first gas channel being formed between the gas hood (730) and the fuel nozzle (720), the gas hood (730) being provided with an air supplement hole communicating with the first gas channel, the gas hood (730) and the gun body (710), characterized in that, The detection device for the gasoline station oil and gas recovery system includes: An adapter (100) provided with a second gas channel (130) and an assembly cavity (140). The assembly cavity (140) penetrates through the adapter (100) and communicates with the second gas channel (130). A locking and fixing structure for cooperating with the oil gun nozzle (720) is arranged in the assembly cavity (140). A first sealing structure for sealingly cooperating with the oil gun nozzle (720) is arranged on the cavity wall at one end of the assembly cavity (140) away from the second gas channel (130). The second gas channel (130) is used to be sealingly communicated with the first gas channel when the adapter (100) and the oil gun nozzle (720) are assembled in place. A pipeline structure (200) includes a tee (210), a three-way reversing valve (220), a first connecting pipe (230) and a second connecting pipe. The three-way reversing valve (220) is connected to the adapter (100) through the tee (210). The outlet of the tee (210) communicates with the second gas channel (130). The first inlet of the tee (210) communicates with the first outlet of the three-way reversing valve (220). The second inlet of the tee (210) communicates with the second outlet of the three-way reversing valve (220) through the first connecting pipe (230). The inlet of the three-way reversing valve (220) is connected to the second connecting pipe. The inlet of the three-way reversing valve (220) can be selectively communicated with the first outlet and the second outlet of the three-way reversing valve (220). The inner diameter of the first connecting pipe (230) is smaller than the inner diameters of the second connecting pipe, the tee (210) and the three-way reversing valve (220). A sensor locking device (300) and a make-up air hole plugging device are respectively arranged on the adapter (100).

2. The detection device for the gas and vapor recovery system of a gas station according to claim 1, wherein The locking and fixing structure includes: At least two coaxially arranged sleeving parts (150) for sleeving on the oil gun nozzle (720). A locking member which is adjustably arranged on the adapter (100) to extend into the assembly cavity (140) to lock the oil gun nozzle (720) sleeved in each of the sleeving parts (150).

3. The detection device for the gasoline station oil and gas recovery system according to claim 2, characterized in that, The locking member is a locking bolt (180). A locking hole communicating with the assembly cavity (140) is arranged on the adapter (100). The locking hole has a smooth hole section and a threaded section. The locking bolt (180) is in threaded cooperation with the threaded section, and a second sealing structure is arranged between the locking bolt (180) and the smooth hole section.

4. The detection device for the gas recovery system of a gas station according to claim 2 or 3, characterized in that, The first sealing structure is a first sealing ring (160). The adapter (100) includes: A main body (110) in which the second gas channel (130) and the assembly cavity (140) are arranged. The fitting set (120) is coaxially arranged with the sleeve part (150). The fitting set (120) is detachably connected to the main body (110) and is located at one end of the assembly cavity (140) far from the second gas passage (130). The fitting set (120) and the main body (110) cooperate to clamp the first sealing ring (160).

5. The detection device for the gas and vapor recovery system of a gas station according to claim 4, wherein, A first annular step surface is provided on the inner wall of the fitting set (120). The first annular step surface cooperates with the sleeve part (150) to clamp the first sealing ring (160).

6. The detection device for the oil and gas recovery system of a gas station according to claim 5, characterized in that A second annular step surface is provided on the outer wall of the fitting set (120). A third annular step surface corresponding to the second annular step surface is provided on the cavity wall of the assembly cavity (140). A second sealing ring (170) is provided between the outer wall of the fitting set (120) and the cavity wall of the assembly cavity (140) and / or between the second annular step surface and the third annular step surface.

7. The detection device for the gas and oil recovery system of a gas station according to claim 2 or 3, characterized in that, The second gas passage (130) includes an intake passage (132) and an outlet passage (131) arranged at an included angle with each other. The intake passage (132) communicates with the outlet passage (131) through the assembly cavity (140). The assembly cavity (140) extends in the same direction as the outlet passage (131) and communicates with it. A guiding conical surface facilitating the oil gun nozzle (720) to pass through the sleeve part (150) is provided on one side of the sleeve part (150) facing the outlet passage (131).

8. The detection device for the gas recovery system of a gas station according to any one of claims 1-3, characterized in that, The sensor locking device (300) is a magnet (310).

9. The detection device for the gas recovery system of a gas station according to claim 8, characterized in that, The sensor locking device (300) further includes a binding strap (320). The magnet (310) is arranged on the binding strap (320). The binding strap (320) is arranged on the adapter (100) through a first chain (500).

10. The detection device for the oil and gas recovery system of a gas station according to any one of claims 1-3, characterized in that, The air supplement hole plugging device is a sealing pin (400) adapted to the air supplement hole. The sealing pin (400) is arranged on the adapter (100) through a second chain (600).

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