CN211946241U - Portable gas recovery system return gas detection device - Google Patents

Abstract

The utility model discloses a return air detection device of a portable oil and gas recovery system. A return air passage for return air is arranged between the barrel of a refueling gun and the front end of the gun body, which comprises: a sleeve fitting, which is a T-shaped three-way pipe Including a first interface, a second interface and a third interface, the part of the socket between the first interface and the second interface is formed with an accommodating cavity, and the inner diameter of the accommodating cavity is larger than the outer diameter of the barrel of the refueling gun. The first interface is provided with a restraining abutment part that cooperates with the front end of the refueling gun body and has a stepped cross-sectional profile. Pass through the first interface and the second interface in sequence and make the front end of the gun body abut on the first interface, so that the return air channel is communicated with the accommodating cavity; the negative pressure sensing mechanism is connected to the third interface of the socket and It is used to sense the negative pressure in the return air channel that communicates with the accommodating cavity. This solution is reliable in implementation and can be matched to meet the detection of all oil and gas recovery nozzles.

Description

Portable gas recovery system return gas detection device

technical field

The utility model relates to the technical field of oil and gas recovery detection devices for refueling guns in gas stations, in particular to a portable oil and gas recovery system return gas detection device.

Background technique

The oil and gas recovery function of the oil and gas recovery system of the gas station is one of its necessary functions. If the gas return of the refueling gun fails or does not meet the standard, it is easy to cause the refueling gun to skip the gun in advance or affect the normal adjustment or other refueling failures. Therefore, when the refueling gun is regularly inspected, its gas return function is usually detected, and the gas return function of the refueling gun of the oil and gas recovery system of the gas station is mainly controlled by the oil and gas recovery pump set in the refueling machine. As we all know, the vacuum pump After long-term work, there will be a certain degree of power attenuation or other problems that cause the negative pressure to be damaged, and the traditional form of checking the air return pump is achieved by disassembling some parts and connecting them. This method Not only is time-consuming, but also when the equipment is repeatedly disassembled and assembled, it is easy to cause the installation gap to become larger and air leakage to occur. Therefore, if it is possible to provide a device that does not need to be disassembled and can realize the return air pump and the return air function detection directly through contact, then the It will greatly improve the efficiency and convenience of tanker inspection.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a portable gas-gas recovery system return gas detection device.

In order to realize the above-mentioned technical purpose, the technical scheme adopted by the present utility model is:

A portable gas return gas detection device for oil and gas recovery system, used for gas return detection of a refueling gun at the front end of the oil and gas recovery system of a gas station, the refueling gun comprises a gun body and a gun barrel connected to the front end of the gun body, the gun barrel and There is a return air passage for return air between the front ends of the gun body, which includes:

The socket is a T-shaped three-way pipe, which includes a first interface, a second interface and a third interface, wherein the first interface and the second interface are arranged opposite to each other, and the socket is located between the first interface and the third interface. A accommodating cavity is formed in the part between the second ports, and the inner diameter of the accommodating cavity is larger than the outer diameter of the barrel of the refueling gun. The first port is provided with a front end of the refueling gun body and has a stepped cross-sectional profile. The inner diameter of the restraint abutment decreases step by step in the direction of approaching the accommodating cavity, the restraint abutment is also provided with a number of O-shaped seals, and the second interface is provided with An annular seal that is fitted and sleeved with the barrel of the refueling gun. The barrel of the refueling gun is used to pass through the first interface and the second interface in sequence, and the front end of the gun body abuts on the first interface, so that the return air channel is connected to the container. cavity connection;

The negative pressure sensing mechanism is connected to the third interface of the socket and used for sensing the negative pressure in the return air channel communicated with the accommodating cavity of the socket.

As one of the embodiments of the negative pressure sensing mechanism, further, the negative pressure sensing mechanism includes:

The connecting sleeve is a tubular structure, one end of which is inserted and fixed on the third interface of the sleeve, and the end of the connecting sleeve connected with the third interface is provided with a first opening, and the other end is provided with a second opening , wherein the apertures of the first opening and the second opening are both smaller than the inner diameter of the connecting sleeve;

a spring, coaxial with the connection sleeve and arranged in the connection sleeve;

The ball is slidably arranged in the connecting sleeve and is located between the spring and the second opening of the connecting sleeve. The outer diameter of the ball is larger than the diameter of the first opening and the second opening, and is 0.95 to 0.9 times the inner diameter of the connecting sleeve. The negative pressure traction ball compression spring is formed in the accommodating cavity.

As a preferred embodiment, preferably, a side surface of the connecting sleeve is provided with a transparent window arranged along its axial direction, and the transparent window is used to assist in observing the position of the ball.

As a preferred alternative embodiment, preferably, the restraining abutting portion is a rubber sleeve with stepped protrusions on the inner peripheral side, which is sleeved on the first interface, and the first interface is The corresponding restraint abutting portion is provided with an annular recessed groove, and the recessed groove is provided with a circlip to prevent the restraint abutment portion from protruding.

As a preferred embodiment, preferably, the vertical gravity of the ball is smaller than the elastic force at the limit of compression of the spring.

As a preferred embodiment, preferably, the vertical gravity of the ball is 1/5 to 1/3 of the elastic force at the limit of compression of the spring.

As a preferred embodiment, preferably, an O-ring is provided between the connecting sleeve and the third interface.

As a preferred embodiment, preferably, it further comprises a pair of profiling shells with symmetrical structure, the pair of profiling shells cover the socket and the connecting sleeve, and the profiling The positions of the casing corresponding to the first interface and the second interface are open structures, and a corresponding through hole is provided at the second opening of the profiling casing corresponding to the connecting sleeve.

Its specific ball sensing feedback principle is that when the refueling gun is refueling, the air return channel is acted by the oil and gas recovery pump in the refueling machine to generate negative pressure, so that the accommodating cavity in the socket also generates negative pressure. One end of the connecting sleeve is connected to the third interface of the sleeve, and the other end of the connecting sleeve is provided with a second opening. Therefore, when there is a negative pressure in the accommodating cavity, the air pressure in the outside atmosphere is different from the air pressure in the accommodating cavity. The air pressure difference will make the outside air assist to push the ball compression spring to achieve the effect of sensing the negative pressure of the return air channel, and the more powerful the oil and gas recovery pump works, the better the negative pressure effect. Under negative pressure, the balls do not or only slightly compress the spring.

As a preferred embodiment, preferably, the profiled casing is further provided with bolt holes for bolt locking.

As another embodiment of the negative pressure sensing mechanism, further, the negative pressure sensing mechanism is a negative pressure gauge.

As a possible implementation manner, further, the inner diameter of the accommodating cavity is 1.05-1.1 times the outer diameter of the barrel of the refueling gun.

By adopting the above technical solution, compared with the prior art, the present utility model has the following beneficial effects: the solution cleverly utilizes the negative pressure sensing mechanism, and the refueling gun is connected by a socket in the form of a T-shaped tee fitting and a refueling gun. The front end of the body is matched to make the air return channel on the gun body of the refueling gun communicate with the accommodating cavity of the socket, and at the same time, the sealing ring is used to make it in close contact, so that when the refueling gun is refueling, the negative pressure generated by the return air of the refueling gun It can make the negative pressure sensing mechanism connected to the accommodating area generate linkage feedback, so as to realize negative pressure sensing, and only need to pass the stroke of the ball compression spring of the negative pressure sensing mechanism (you can set a scale on the connecting sleeve to remind ) or the pressure value of the negative pressure gauge to carry out the quantitative standard. The operator only needs to judge whether the return air pump of the refueling gun is faulty or the function is attenuated to a non-compliant state according to the quantitative state fed back, and then the feedback can be taken in advance. To carry out the maintenance of the tanker, it improves the convenience of detection efficiency, saves a lot of manpower and improves the safety of the tanker, and can be matched to meet the detection of all oil and gas recovery special fuel guns.

Description of drawings

Below in conjunction with the accompanying drawings and specific embodiments, the utility model scheme is further elaborated:

Fig. 1 is the brief partial cutaway structure schematic diagram when the utility model device is connected on the refueling gun;

2 is a schematic diagram of the connection between the fuel dispenser and the oil tank when the device of the present invention is connected to the fuel gun, wherein one of the two pipelines connecting the fuel dispenser and the fuel tank is an air return pipe, and the other is an oil outlet pipe;

Fig. 3 is a brief disassembled and cut structural schematic diagram of the device of the present invention;

Fig. 4 is the brief sectional structure schematic diagram of the device of the present invention;

FIG. 5 is a schematic cross-sectional structural schematic diagram of the socket of the device of the present invention;

FIG. 6 is a schematic diagram of the implementation structure when the negative pressure sensing mechanism of the device of the present invention is a negative pressure gauge;

FIG. 7 is a schematic diagram of a brief exploded structure when the restraint abutment part of the socket of the present invention adopts a split structure;

FIG. 8 is a schematic schematic diagram of the assembly of the constraining ground connection part of the socket of the present invention in a split type.

Detailed ways

As shown in one of Figures 1 to 5, the utility model device is a portable gas and gas recovery system return gas detection device, which is used for gas return detection of the refueling gun 1 at the front end of the oil and gas recovery system of a gas station. The refueling gun 1 includes a gun body 12 And the gun barrel 11 connected to the front end of the gun body 12, between the gun barrel 11 and the front end of the gun body 12, there is a return air passage 13 for air return, and the device of this solution includes:

The socket fitting 2 is a T-shaped three-way pipe fitting, which includes a first interface 21, a second interface 23 and a third interface 22, wherein the first interface 21 and the second interface 23 are arranged opposite to each other, and the socket is connected The part of the component 2 between the first interface 21 and the second interface 23 is formed with an accommodating cavity 24, and the inner diameter of the accommodating cavity 24 is larger than the outer diameter of the barrel 11 of the refueling gun 1, and the first interface 21 is provided with There is a restraining abutting part that cooperates with the front end of the gun body 12 of the refueling gun 1 and has a stepped cross-sectional profile. The inner diameter of the restraining abutting part gradually decreases in the direction of approaching the accommodating cavity 24. There are several O-shaped seals 211 and 212, wherein the main purpose of the step-like structure of the constraining abutting part is to make the socket part 2 suitable for the front end of the gun body 12 of the refueling gun 1 of different specifications and brands to closely abut. Then, the second interface 23 is provided with an annular seal 231 that is fitted and sleeved with the barrel 12 of the refueling gun 1, and the barrel 11 of the refueling gun 1 is used to pass through the first interface 21 and the second interface in sequence 23 and make the front end of the gun body 12 abut on the first interface 21, so that the air return channel 13 is communicated with the accommodating cavity 24;

The negative pressure sensing mechanism 3 is connected to the third interface 22 of the socket piece 2 and is used for sensing the negative pressure in the return air passage 13 communicating with the accommodating cavity 24 of the socket piece 2 .

Wherein, as one of the embodiments of the negative pressure sensing mechanism 3, further, the negative pressure sensing mechanism 3 includes:

The connection sleeve 31 is a tubular structure 311 , one end of which is inserted and fixed on the third interface 22 of the sleeve 2 , and the end of the connection sleeve 31 connected to the third interface 22 is provided with a first opening 312 , and the other end of the connection sleeve 31 is provided with a first opening 312 . The second opening 313 is provided in the part, wherein the diameters of the first opening 312 and the second opening 313 are both smaller than the inner diameter of the tubular structure 311 of the connecting sleeve 31;

The spring 32 is coaxial with the connecting sleeve 31 and is arranged in the connecting sleeve 31;

The ball 33 is slidably arranged in the connecting sleeve 31 and is located between the spring 32 and the second opening 313 of the connecting sleeve 31. The outer diameter of the ball 33 is larger than the diameter of the first opening 312 and the second opening 313, and is a connection The inner diameter of the sleeve 31 is 0.95-0.9 times, and the negative pressure traction ball 33 is formed in the accommodating cavity 24 of the sleeve 2 to compress the spring 32 .

In addition, in order to facilitate the observation of the movement of the balls 33 of the negative pressure sensing mechanism 3 during detection, as a preferred embodiment, preferably, the side surface of the connecting sleeve 31 is provided with a transparent transparent plate arranged along its axial direction. Open the window, the transparent window is used to assist in observing the position of the ball 33; in order to facilitate the intuitive display, as a preferred embodiment, preferably, the vertical gravity of the ball 33 is smaller than the compression of the spring 32 The elastic force at the limit, that is, when the device is not used for testing, even if the ball 33 is placed vertically, it will not directly compress the spring 32 to the limit. 32 is 1/5 to 1/3 of the elastic force at the compression limit, that is, the ball 33 compresses at most a small part of the stroke of the spring 32 under natural conditions. It should be noted that the connecting sleeve 31 can be It can be a constriction at both ends (the constriction is set as the first opening 312 and the second opening 313), or it can be a straight glass tube, and at this time, the two ends of the glass tube are directly set as the first opening 312 and the second opening 312. The second opening 313 is used to block the ball 33 by adding the outer casing 4, and one end of the spring 32 is in contact with the third interface 22 of the connecting sleeve 2. When the connecting sleeve 31 is made of glass tube material, it is not necessary to provide a separate opening window, only need After debugging, mark the scale line (safety limit, critical limit, danger limit) directly on the surface of the connecting sleeve 31 to improve the user's intuitive judgment ability and convenience. It can also be a tube with one end closed, in which After the open end is closed and welded, holes are then drilled (ie, the first hole 312 and the second hole 313 are drilled).

In addition, in order to improve the air tightness of the connection, as a preferred embodiment, preferably, an O-ring 221 is provided between the connection sleeve 31 and the third interface 22 .

In order to improve the connection reliability of the device, as a preferred embodiment, preferably, this solution further includes a pair of profiling shells 4 with symmetrical structures, and the pair of profiling shells 4 are sleeved with the The part 2 and the connecting sleeve 3 are covered together, and the setting position of the profiling shell 4 corresponding to the first interface 21 and the second interface 23 is an open structure, and the second opening 313 of the profiling shell 4 corresponding to the connecting sleeve 31 is provided with corresponding In order to facilitate disassembly, as a preferred embodiment, preferably, the profiling housing 4 is also provided with bolt holes 42 and 43 for bolt locking.

In order to improve the sensing sensitivity, as a possible implementation manner, further, the inner diameter of the accommodating cavity 24 is 1.05-1.1 times the outer diameter of the barrel 11 of the refueling gun 1 .

The specific ball 33 sensing feedback principle is that when the refueling gun 1 refuels, the air return channel 13 is acted by the oil and gas recovery pump in the refueling machine to generate negative pressure, so that the accommodating cavity 24 in the socket 2 is also generated accordingly. Negative pressure, and because one end of the connecting sleeve 31 is connected to the third interface 22 of the socket 2, the other end of the connecting sleeve 31 is provided with a second opening 313, therefore, when there is negative pressure in the accommodating cavity 24, The difference between the air pressure in the outside atmosphere and the air pressure in the accommodating cavity 24 will make the outside air assist to push the ball 33 to compress the spring 32, so as to achieve the effect of sensing the negative pressure of the return air passage 13, and the more powerful the oil and gas recovery pump is, its The better the negative pressure effect is, if the working capacity of the oil and gas recovery pump is attenuated or there is no negative pressure effect, the ball 33 will not or only slightly compress the spring 32 .

Referring to FIG. 6 , it should be noted that the negative pressure sensing mechanism mentioned in this solution can not only be the structure mentioned above, but also the negative pressure gauge 3 .

This scheme cleverly utilizes the negative pressure sensing mechanism, through the cooperation between the socket 2 in the form of a T-shaped tee fitting and the front end of the gun body 12 of the fuel gun 1, so that the return air channel 13 on the gun body 12 of the fuel gun 1 is connected to the sleeve. The accommodating cavity 24 of the connector 2 is communicated, and at the same time, the sealing ring is used to make it in close contact, so that when the refueling gun 1 is refueling, the negative pressure generated by the return air can make the negative pressure sensing mechanism 3 communicated with the accommodating area. Generate linkage feedback to realize negative pressure sensing, and only need to use the stroke of the ball 33 of the negative pressure sensing mechanism 3 to compress the spring 32 (you can set a scale on the connecting sleeve 3 to prompt) or the pressure value of the negative pressure gauge. To carry out quantitative standards, the operator only needs to judge whether the return air pump of the refueling gun is faulty or the function is attenuated to a non-compliant state according to the quantitative status fed back, and then they can take feedback in advance to carry out the maintenance of the refueling machine and improve the detection. The convenience of efficiency also saves a lot of manpower and improves the safety of the tanker.

Referring to FIG. 7 or FIG. 8 , as a preferred embodiment of the restraint abutment part, the restraint abutment part is a rubber sleeve 25 with stepped protrusions on the inner peripheral side, which is sleeved on the On the first interface of the socket part 2 , the first interface is provided with an annular recessed groove 26 corresponding to the restraint abutment portion, and the recessed groove 26 is provided with a retaining spring 27 to prevent the restraint abutment portion from protruding.

The above are the embodiments of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, what is done in accordance with the scope of the present invention's patent application Equivalent changes, modifications, replacements and modifications should all fall within the scope of the present invention.

Claims (10)

1. a portable oil and gas recovery system return gas detection device, used for the gas return detection of the refueling gun at the front end of the oil and gas recovery system of the gas station, the refueling gun comprises a gun body and a barrel connected at the front end of the gun body, the gun There is a return air passage for recovering oil and gas between the pipe and the front end of the gun body, which is characterized in that: it includes: The socket is a T-shaped three-way pipe, which includes a first interface, a second interface and a third interface, wherein the first interface and the second interface are arranged opposite to each other, and the socket is located between the first interface and the third interface. A accommodating cavity is formed in the part between the second ports, and the inner diameter of the accommodating cavity is larger than the outer diameter of the barrel of the refueling gun. The first port is provided with a front end of the refueling gun body and has a stepped cross-sectional profile. The inner diameter of the restraint abutment decreases step by step in the direction of approaching the accommodating cavity, the restraint abutment is also provided with a number of O-shaped seals, and the second interface is provided with An annular seal that is fitted and sleeved with the barrel of the refueling gun. The barrel of the refueling gun is used to pass through the first interface and the second interface in sequence, and the front end of the gun body abuts on the first interface, so that the return air channel is connected to the container. cavity connection; The negative pressure sensing mechanism is connected to the third interface of the socket and used for sensing the negative pressure in the return air channel communicated with the accommodating cavity of the socket. 2. The portable oil and gas recovery system return gas detection device according to claim 1, wherein the negative pressure sensing mechanism comprises: The connecting sleeve is a tubular structure, one end of which is inserted and fixed on the third interface of the sleeve, and the end of the connecting sleeve connected with the third interface is provided with a first opening, and the other end is provided with a second opening , wherein the apertures of the first opening and the second opening are both smaller than the inner diameter of the connecting sleeve; a spring, coaxial with the connection sleeve and arranged in the connection sleeve; The ball is slidably arranged in the connecting sleeve and is located between the spring and the second opening of the connecting sleeve. The outer diameter of the ball is larger than the diameter of the first opening and the second opening, and is 0.95 to 0.9 times the inner diameter of the connecting sleeve. The negative pressure traction ball compression spring is formed in the accommodating cavity. 3 . The return air detection device of a portable oil and gas recovery system according to claim 2 , wherein: the side of the connecting sleeve is provided with a transparent window arranged along its axial direction, and the transparent window is used to assist the Observe the position of the balls. 4 . The return air detection device of a portable oil and gas recovery system according to claim 2 , wherein the restraining abutting part is a rubber sleeve with stepped protrusions on the inner peripheral side, which is sleeved on the first interface. 5 . On the first interface, an annular recessed groove is provided on the first interface corresponding to the restraining abutting portion, and a retaining spring for preventing the restraining abutting portion from protruding is provided on the recessed groove. 5 . The portable gas recovery system return air detection device according to claim 2 , wherein the vertical gravity of the ball is less than the elastic force when the spring is compressed, and the vertical gravity of the ball is the spring compression limit. 6 . 1/5 to 1/3 of the elastic force. 6 . The return air detection device of a portable oil and gas recovery system according to claim 2 , wherein an O-ring is provided between the connecting sleeve and the third interface. 7 . 7. The return gas detection device of a portable oil and gas recovery system according to claim 2, characterized in that: it further comprises a pair of profiling shells with symmetrical structure, and the pair of profiling shells connect the socket and the The connecting sleeve cover is closed therein, and the positions corresponding to the first interface and the second interface of the profiling shell are open structures, and the profiling shell corresponding to the second opening of the connecting sleeve is provided with a corresponding through hole. 8 . The device for detecting the return air of a portable oil and gas recovery system according to claim 7 , wherein the profiling shell is further provided with bolt holes for bolt locking. 9 . 9 . The device for detecting the return air of a portable oil and gas recovery system according to claim 1 , wherein the negative pressure sensing mechanism is a negative pressure gauge. 10 . 10 . The return gas detection device of a portable oil and gas recovery system according to claim 1 , wherein the inner diameter of the accommodating cavity is 1.05-1.1 times the outer diameter of the barrel of the refueling gun. 11 .

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