CN115265328A - A kind of fuel pipe assembly inspection tool and detection method - Google Patents

Abstract

The invention discloses a fuel filler pipe assembly inspection tool and a detection method. The inspection tool includes a detection table and a plug gauge, and the detection table includes a fuel filler pipe port positioning block, an oil outlet pipe port positioning block, an oil return pipe port positioning block and an installation frame positioning block. piece. The fuel filler pipe assembly can be positioned and fixed by the positioning block of the mounting frame, so that each nozzle on the top fits with the end face detection part provided on the side of the fuel filler pipe port positioning block, the oil outlet pipe port positioning block and the oil return pipe port positioning block respectively. , observe whether there is a gap between the nozzle and the end face detection part, and can detect whether there is a deviation in the pipe length and pipe diameter; the positioning block of the fuel nozzle, the positioning block of the oil outlet nozzle and the positioning block of the oil return nozzle are also provided with positioning holes. , each positioning hole coincides with the central axis of the corresponding nozzle, use a plug gauge to pass through the positioning hole to detect the corresponding nozzle, observe the plugging of the plug gauge, and detect whether there is a deviation in the diameter and axial direction of the nozzle. The inspection tool of the invention has the advantages of simple and quick detection method, strong practicability and high detection accuracy.

Description

A fuel oil pipe assembly inspection tool and inspection method

technical field

Embodiments of the present invention belong to the technical field of fuel pipe assembly inspection tools, and more specifically, relate to a fuel oil pipe assembly inspection tool and a detection method.

Background technique

The filler pipe assembly cannot detect the position of the fuel filler port and the size of the installation point through conventional detection methods. During the assembly process, the fuel filler pipe assembly is connected to the vehicle body and the oil pipe. If there is a deviation in the size of the fuel filler pipe assembly, there will be interference with the body and the oil pipe cannot be connected. The phenomenon.

At present, during the inspection process of the oil filling pipe, various scales are mainly used for inspection and measurement, and there is no special inspection tooling. However, when conventional inspection tools such as calipers are used to inspect the oil pipe assembly one by one, the detection error is relatively large. The efficiency is low, and in the face of the special-shaped structure of each pipe of the oil filling pipe assembly, it is impossible to calibrate and detect the position of each nozzle in three-dimensional space, and it is impossible to determine whether there is any axial and radial deviation of each pipe.

Contents of the invention

Aiming at the inability to calibrate and detect the position of the special-shaped structure of the mouth of the filling pipe assembly in the prior art, and the detection error is large and the detection efficiency is low, the present invention provides a checking tool for the filling pipe assembly to solve such problems.

In order to achieve the above object, the present invention provides a fuel filler pipe assembly inspection tool, including a plug gauge and a detection platform for installing and positioning the fuel filler pipe assembly; Orifice positioning block, oil outlet positioning block, oil return pipe positioning block, installation frame positioning block, wherein: the top of the installation frame positioning block is provided with a positioning column, which is compatible with the limit fixing hole on the installation frame; The positioning block of the nozzle, the positioning block of the oil outlet pipe, and the positioning block of the oil return pipe are respectively equipped with an end face detection part to fit each nozzle on the filling pipe assembly; the positioning block of the filling pipe, the positioning block of the oil outlet, Positioning holes are respectively arranged on the positioning blocks of the oil return nozzle, and the central axis of the positioning holes coincides with the central axis of the corresponding nozzle on the filling pipe assembly; the diameter of the holding rod of the plug gauge is the same as that of the corresponding positioning hole, including The first plug gauge adapted to the diameter of the oil filling pipe port, the second plug gauge adapted to the diameter of the oil outlet pipe port, and the third plug gauge adapted to the diameter of the oil return pipe port; the first plug gauge, the second plug gauge and the third plug gauge are aligned with the corresponding nozzles on the oil filling pipe assembly after being axially limited through the corresponding positioning holes.

Further, the positioning hole includes: a first positioning hole provided on the positioning block of the filling nozzle, whose central axis coincides with the central axis of the filling nozzle, and whose diameter is larger than the inner diameter of the filling nozzle and smaller than the outer diameter of the filling nozzle; The second positioning hole on the positioning block of the oil outlet pipe, its central axis coincides with the central axis of the oil outlet pipe, and its diameter is larger than the inner diameter of the oil outlet pipe and smaller than the outer diameter of the oil outlet; the third positioning hole is located on the positioning block of the oil return pipe The hole, whose central axis coincides with the central axis of the oil return pipe mouth, has a diameter larger than the oil return pipe inner diameter and smaller than the oil return pipe outer diameter.

Further, the end surface detection part includes: a first end surface detection part arranged on the side of the positioning block of the filling nozzle, the bottom of which is attached to the end surface of the filling nozzle; a second end detection part arranged on the side of the positioning block of the oil outlet nozzle part, the bottom of which is attached to the end surface of the oil outlet pipe; the third end surface detection part located on the side of the positioning block of the oil return pipe, whose bottom is attached to the end surface of the oil return pipe.

Further, a feeler gauge is also included, and the feeler gauge detects the gap between the end surface detection part and each nozzle on the filling pipe assembly.

Further, it also includes positioning detection parts which are respectively arranged on the positioning block of the oil filling nozzle, the positioning block of the oil outlet pipe and the positioning block of the oil return pipe through screw connection. The positioning detection part is a T-shaped round pipe structure, and the There are the positioning hole and the end face detection part.

Further, the positioning column is provided with external threads; the mounting bracket is sleeved on the positioning column, and is tightened and fixed by nuts, so that the installation and positioning of the filling pipe assembly on the inspection tool can be completed.

Further, it also includes a quick pressing mechanism arranged on the bottom plate, the quick pressing mechanism includes a pressing base, a pull handle, a pressing rod, a linkage rod and a pressing head; the mounting bracket is sleeved on the positioning column , push and pull the handle, and the pressing head will press and fix the installation frame, so that the filling pipe assembly can complete the installation and positioning work on the inspection tool.

According to another aspect of the present invention, there is also provided a detection method for a fuel filler pipe assembly, comprising the following steps:

S100: Position and fix the filling pipe assembly on the inspection tool. If the installation of the filling pipe assembly is unsuccessful, it is judged that the inspection is unqualified; if the installation is successful, proceed to the next step of testing;

S200: Visually inspect the fit between the end face of each nozzle and the corresponding end face detection part, and determine whether there is radial deviation of the nozzle: if there is a clearance angle, it is determined that the radial deviation of the nozzle is unqualified; the feeler gauge detects that the gap exceeds If it is within the error range, it is judged that the length of the pipe is not up to the standard and is unqualified; if the gap width is within the error range when it is pasted or detected with a feeler gauge, it is judged that the inspection is qualified, and the next step of inspection is carried out;

S300: After the plug gauge of the corresponding specification is limited by the positioning hole, insert the open end of the front end into the corresponding nozzle, and judge whether the diameter and position of the nozzle are normal according to the insertion situation: if the plug cannot be inserted, remove the filler pipe assembly The pair of corresponding nozzles are subjected to secondary inspection. If the through end is not plugged in, it is judged that the diameter of the nozzle is too small; Next step detection work;

S400: Insert the stop end of the back end of the plug gauge into the corresponding nozzle, and judge whether the diameter of the nozzle is too large according to the insertion situation: the stop end can be inserted into the nozzle, and it is judged that the diameter of the nozzle is too large, and the inspection fails; the stop end cannot be inserted , determine that the inspection is qualified, and proceed to the next step of inspection;

S500: Complete the inspection work, and remove the oil filling pipe assembly.

Generally speaking, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

(1) The inspection tool for the filling pipe assembly of the present invention can detect the special-shaped structure of each pipeline of the filling pipe assembly: through the positioning block of the installation frame on the detection platform, the installation of the filling pipe assembly can be realized Positioning, and judging whether there is a deviation between the positioning frame and the length of each pipeline through the positioning block of the filling nozzle, the positioning block of the oil outlet pipe and the positioning block of the oil return pipe respectively fitting with each nozzle; through the first end surface detection part, The second end surface detection part and the third end surface detection part are respectively attached to the end surface of the corresponding nozzle, and the pipe length and the radial offset of the nozzle can be detected by visual inspection and feeler gauge measurement; by setting the first positioning hole , the second positioning hole and the third positioning hole, the central axis of the three coincides with the central axis of the corresponding nozzle respectively, the diameters of the three are the same as the diameter of the holding rod of the corresponding plug gauge, and the through end and stop end of the plug gauge The corresponding nozzle can be quickly aligned through the corresponding positioning hole to realize the detection of the diameter and axial deviation of the nozzle.

(2) A fuel pipe assembly inspection tool of the present invention can carry out high-precision detection of the fuel pipe assembly through the detection table with plug gauges and feeler gauges, and its detection accuracy can reach the micron level; during detection, through visual inspection and use The plug gauge and feeler gauge can quickly complete the detection of each nozzle of the oil filling pipe assembly. The detection method is simple, which can greatly reduce the time spent on detection and improve the detection efficiency.

(3) A fuel oil pipe assembly inspection tool of the present invention has simple structure, low cost, convenient assembly, strong utility and high promotional value.

Description of drawings

Fig. 1 is a schematic structural view of a filler pipe assembly in an embodiment of the present invention;

Fig. 2 is a schematic structural view of the detection platform in the first embodiment of the present invention;

Fig. 3 is a schematic structural diagram of the positioning detection part in the first embodiment of the present invention;

Fig. 4 is a structural schematic view of the oil filling pipe assembly loaded on the detection platform in the second embodiment of the present invention;

Fig. 5 is a structural schematic view of the filling pipe assembly loaded on the detection platform in the first embodiment of the present invention;

Fig. 6 is a structural diagram of the quick pressing mechanism in the second embodiment of the present invention;

Fig. 7 is an exploded schematic view of the quick pressing mechanism in the second embodiment of the present invention;

Fig. 8 is a structural schematic diagram of the detection of the filling pipe assembly in the second embodiment of the present invention;

Fig. 9 is a schematic diagram of a detection process of a filling pipe assembly in an embodiment of the present invention;

Fig. 10 is a schematic flowchart of a detection method for a fuel filler pipe assembly in an embodiment of the present invention.

In all the drawings, the same reference numerals represent the same technical features, specifically: 1-filling pipe assembly, 11-filling pipe mouth, 12-oil outlet pipe mouth, 13-oil return pipe mouth, 14-mounting frame, 141-limit fixing hole, 2-detection platform, 21-bottom plate, 22-positioning block of oil filling pipe port, 23-positioning block of oil outlet pipe port, 24-positioning block of oil return pipe port, 25-positioning block of installation frame, 251-positioning Column, 26-first positioning detection part, 261-first positioning hole, 262-first end face detection part, 27-second positioning detection part, 271-second positioning hole, 272-second end face detection part, 28- The third positioning detection part, 281-the third positioning hole, 282-the third end face detection part, 3-the fast pressing mechanism positioning block, 4-the quick pressing mechanism, 41-the pressing base, 42-the pull handle, 43 -pressing rod, 44-linkage rod, 45-pressing head, 5-the first plug gauge, 6-the second plug gauge, 7-the third plug gauge.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

As shown in Figures 1-8, the embodiment of the present invention provides a fuel oil pipe assembly inspection tool, including a detection platform 2 and a plug gauge. The positioning block 22, the oil return pipe opening positioning block 24 and the mounting frame positioning block 25. The oil filling pipe assembly 1 can be positioned and fixed by the mounting bracket positioning block 25, so that each nozzle on it is respectively connected with the oil filling pipe opening positioning block 22, the oil outlet pipe opening positioning block 22 and the oil return pipe opening positioning block 24 sides. The fitting of the end face detection part, by observing whether there is a gap between the nozzle and the end face detection part, can detect whether there is a deviation in the pipe length and the radial direction of the nozzle; the filling nozzle positioning block 22, the oil outlet nozzle positioning block 22 and The positioning block 24 of the oil return nozzle is also provided with positioning holes respectively, and each positioning hole coincides with the central axis of the corresponding nozzle, and the plug gauge of the appropriate specification is used to pass through the positioning hole to detect the corresponding nozzle. It can detect whether there is a deviation in the diameter and axial direction of the nozzle. The inspection tool of the invention has the advantages of simple and fast detection method, strong practicability and high detection precision.

The inspection tool of the present invention can detect, but is not limited to, the filling pipe assembly 1 shown in Figure 1, the filling pipe assembly 1 includes a filling pipe mouth 11, an oil outlet pipe mouth 12, an oil return pipe mouth 13 and a mounting frame 14. The installation frame 14 is also provided with a limit fixing hole 141, through the cooperation of the bolt and the limit fixing hole 141, the filling pipe assembly 1 can be fixed on the vehicle body, so that the filling pipe mouth 11, the oil outlet pipe mouth 12, the return pipe The oil pipe port 13 is aligned with the corresponding oil pipeline on the vehicle body, and the next step of installation work is carried out. Therefore, the positioning function of the installation frame 14 can be used to check the length of the pipeline, the position of the nozzle (that is, the axial direction of the nozzle), the end surface of the nozzle, and (Nozzle radial direction) and nozzle diameter for deviation detection.

As shown in Figures 2-4, in the first embodiment of the present invention, the detection platform 2 includes a bottom plate 21, and a filling nozzle positioning block 22 fixed on the top of the bottom plate 21, an oil outlet nozzle positioning block 22, and an oil return pipe. Port positioning block 24, mounting frame positioning block 25 and positioning detection piece. The positioning detection part is a T-shaped round pipe structure, including a first positioning detection part 26, a first positioning detection part 26, a first positioning detection part 26, a first positioning block 22, a positioning block 22 of the oil outlet pipe opening, and a positioning block 24 of the oil return pipe port, which are respectively fixed by screw connections. Two positioning detection parts 27 and a third positioning detection part 28 .

The first positioning detection part 26 includes a first positioning hole 261 and a first end surface detection part 262, wherein the bottom of the first end surface detection part 262 is a smooth plane, which can be kept in contact with the end surface of the filling nozzle 11; The central axis of a positioning hole 261 coincides with the central axis of the filling nozzle 11; its diameter is greater than the inner diameter of the filling nozzle 11 and less than the outer diameter of the filling nozzle 11, because the outer diameter of the filling nozzle 11 is greater than the diameter of the first positioning hole 261, so that The end surface of the filler nozzle 11 is attached to the first end surface detection part 262 .

The second positioning detection part 27 includes a second positioning hole 271 and a second end surface detection part 272; wherein the bottom of the second end surface detection part 272 is a smooth plane, which can be kept in contact with the end surface of the oil outlet pipe 12; The central axis of the second positioning hole 271 coincides with the central axis of the oil outlet port 12 , and its diameter is larger than the inner diameter of the oil outlet port 12 and smaller than the outer diameter of the oil outlet port 12 .

The third positioning detection part 28 includes a third positioning hole 281 and a third end surface detection part 282; wherein the bottom of the third end surface detection part 282 is a smooth plane, which can be kept in contact with the end surface of the oil return nozzle 13; The central axis of the three positioning holes 281 coincides with the central axis of the oil return nozzle 13 , and its diameter is larger than the inner diameter of the oil return nozzle 13 and smaller than the outer diameter of the oil return nozzle 13 .

The top of the positioning block 25 of the installation frame is provided with a positioning column 251 , the positioning column 251 is adapted to the limit fixing hole 141 on the installation frame 14 , and the limit fixing hole 141 can be sleeved on the positioning column 251 . The positioning column 251 is also provided with an external thread, and by cooperating with the nut, the mounting bracket 14 can be fixedly limited to the top of the positioning block 25 of the mounting bracket, so that the filling pipe assembly 1 can complete the installation and positioning work on the inspection tool 2, and can Carry out the next detection work.

As shown in Figures 5-7, in the second embodiment of the present invention, in order to improve the installation, positioning and disassembly speed of the filling pipe assembly 1, a quick pressing mechanism 4 is provided to realize quick pressing and fixing of the mounting frame 14, compared with the The positioning column 251 is fixed by tightening the nut, and the operation steps are few, and only one action is needed to complete the fixing or loosening action of the mounting frame 14, which saves the time of the detection state. The quick pressing mechanism 4 is fixed on the base plate 11 through the quick pressing mechanism positioning block 3 provided at the bottom, and the quick pressing mechanism positioning block 3 is of the same height as the mounting frame positioning block 25 . The quick pressing mechanism 4 includes a pressing base 41, a pull handle 42, a pressing rod 43, a linkage rod 44 and a pressing head 45. The top of the pressing base 41 is hinged with one end of the pressing rod 43, and the middle end thereof is It is hinged with the bottom of the pull handle 42; the top of the linkage rod 44 is hinged with the middle end of the pull handle 42, and its bottom is hinged with the middle end of the compression rod 43; by pressing the base 41, the pull handle 42, the compression rod 43 and The four linkage rods 44 are sequentially connected to form a four-bar linkage mechanism; when the pull handle 42 is pushed outward, the compression head 45 located at the other end of the compression rod 43 moves upwards, and separates from the mounting frame 14 to complete the loosening action; When the pull handle 42 is pushed inward and kept in a vertical state, the pull handle 42 is on the same straight line with the hinge points of the compression base 41, the linkage rod 44 and the linkage rod 44 compression rod 43 respectively. Self-locking function, the pressing head 45 firmly presses the installation frame 14 .

After the installation frame 14 is set on the positioning column 251 and pressed and fixed, so that the oil filling pipe assembly 1 is installed on the detection platform 2, the next step of detection work can be carried out. By observing the nozzles of the oil filling pipe assembly 1 The degree of fit with the corresponding end face detection part can detect whether the nozzle has radial deviation or the length is not up to the standard; through the plug gauge and the corresponding positioning hole to detect a nozzle, it can detect whether the diameter and axial direction of the nozzle are There is a deviation. As shown in Figure 8, in the present invention, the plug gauge is composed of a holding rod and a through end and a stopper respectively arranged at the front and rear ends of the holding rod, and it includes a first plug gauge 51 that is adapted to the diameter of the filling nozzle 11 , the second plug gauge 52 adapted to the diameter of the oil outlet pipe port 12, and the third plug gauge 53 adapted to the diameter of the oil return pipe port 13.

The diameter of the holding rod of the first plug gauge 51 is the same as the diameter of the first positioning hole 261. When passing through the first positioning hole 261, the central axis of the first plug gauge 51 coincides with the central axis of the filling nozzle 11. The first positioning hole 261 can axially limit the holding rod of the first plug gauge 51 , and facilitate the alignment of the through end and the stop end of the first plug gauge 51 and insertion into the filling nozzle 11 . When the through end of the first plug gauge 51 can be inserted normally into the filling nozzle 11 and the stop end cannot be inserted, it can be judged that the diameter of the filling nozzle 11 reaches the standard and no axial deviation occurs; the through end and the stop of the first plug gauge 51 When both ends can be inserted into the filling nozzle 11, it can be determined that the diameter of the filling nozzle 11 is too large; Axial offset, disassemble the filler pipe assembly 1 and check again, if the through end can be inserted normally, it can be judged that the filler nozzle 11 has an axial offset, and the position of the nozzle is deviated, if it cannot be inserted, Then it can be determined that the diameter of the filling nozzle 11 is too small.

The diameter of the holding rod of the second plug gauge 52 is the same as the diameter of the second positioning hole 271, and its open end and stop end are adapted to the diameter of the oil outlet pipe port 12, and can be matched with the second positioning hole 271 to match the diameter of the oil outlet pipe port 12. Check whether there is any deviation with the axial direction.

The diameter of the holding rod of the third plug gauge 53 is the same as the diameter of the third positioning hole 281, and its open end and non-stop end are adapted to the diameter of the oil return pipe port 13, and can match the diameter of the oil return pipe port 13 with the third positioning hole 281. Check whether there is any deviation with the axial direction.

As shown in Figure 9-10, the embodiment of the present invention also provides a detection method for the fuel pipe assembly through the inspection tool for the fuel pipe assembly, including the following steps:

S100: Position and fix the filling pipe assembly 1 on the inspection tool 2. If the installation of the filling pipe assembly 1 is unsuccessful, it is determined that the inspection is unqualified; if the installation is successful, proceed to the next step of inspection;

S200: Visually inspect the fit between the end face of each nozzle and the corresponding end face detection part, and determine whether there is radial deviation of the nozzle: if there is a clearance angle, it is determined that the radial deviation of the nozzle is unqualified; the feeler gauge detects that the gap exceeds If it is within the error range, it is judged that the length of the pipe is not up to the standard and is unqualified; if the gap width is within the error range when it is pasted or detected with a feeler gauge, it is judged that the inspection is qualified, and the next step of inspection is carried out;

S300: After the plug gauge of the corresponding specification is limited by the positioning hole, insert the open end of the front end into the corresponding nozzle, and judge whether the diameter and position of the nozzle are normal according to the insertion situation: if the plug cannot be inserted, remove the filler pipe assembly 1 pair of corresponding nozzles shall be inspected twice. If the through-end is not plugged in, it is judged that the diameter of the nozzle is too small. If it is plugged in, it is judged that the nozzle is axially offset and the inspection is unqualified; Carry out the next step of detection work;

S400: Insert the stop end of the back end of the plug gauge into the corresponding nozzle, and judge whether the diameter of the nozzle is too large according to the insertion situation: the stop end can be inserted into the nozzle, and it is judged that the diameter of the nozzle is too large, and the inspection fails; the stop end cannot be inserted , determine that the inspection is qualified, and proceed to the next step of inspection;

S500: Complete the inspection work, and remove the filler pipe assembly 1.

In step S100, it can be judged visually whether the upper limit fixing hole of the installation frame 14 is not compatible with the positioning column 251 or the pipe is too long to make it impossible to install. After marking the cause of the unqualified inspection, proceed to the next set of fuel pipe assembly 1 detection.

In the embodiment of the present invention, the mounting frame positioning block 25 arranged on the detection platform 2 can realize the installation and positioning of the oil filling pipe assembly 1, and the oil filling pipe mouth positioning block 22, the oil outlet pipe opening positioning block 22 and the oil return pipe can be installed and positioned. Orifice positioning block 24 is judged whether deviation occurs between positioning frame 14 and each pipeline pipe length respectively with each pipe mouth fitting condition; Corresponding to the fit of the end face of the nozzle, through visual inspection and feeler gauge measurement, it is possible to detect whether there is a radial deviation in the nozzle; by providing the first positioning hole 261, the second positioning hole 271 and the third positioning hole 281, the three The central axis of the three coincides with the central axis of the corresponding nozzle, and the diameters of the three are the same as the diameter of the holding rod of the corresponding plug gauge. The through end and the stop end of the plug gauge can be quickly aligned with the corresponding nozzle through the corresponding positioning hole. Realize the detection of nozzle diameter and axial deviation.

The detection table 2 of the present invention cooperates with the plug gauge and the feeler gauge to carry out high-precision detection on the filling pipe assembly 1, and its detection accuracy can reach the micron level; during detection, the inspection can be quickly completed by visual inspection and the use of the plug gauge and the feeler gauge. The detection method of each nozzle of the filling pipe assembly 1 is simple, which can greatly reduce the time spent on detection and improve the detection efficiency.

The oil filling pipe assembly checking fixture of the present invention has the advantages of simple structure, low cost, convenient assembly, strong utility and high popularization value.

The detection platform 2 of the present invention can adjust the position, height and inclination angle of each functional part according to the special-shaped structure of the fuel pipe assembly 1 when detecting different types of fuel pipe assemblies 1, so that the limit fixing hole 141 of the mounting frame 14 Fitting with the positioning column 251, each end surface detection part fits with the corresponding nozzle, and the central axis of each positioning hole coincides with the central axis of the corresponding nozzle, so as to realize the detection of different types of filling pipe assemblies 1 . Each functional part on the detection platform 2 can be redesigned after being measured according to the standard part of the oil filling pipe assembly 1, and then fixed on the bottom plate 21 after being obtained by machining.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, etc., All should be included within the protection scope of the present invention.

Claims (8)

1. The utility model provides an utensil is examined to oil filling pipe assembly, includes the feeler gauge and is used for carrying out detection platform (2) of installation location to oil filling pipe assembly, its characterized in that:

examine test table (2) and include bottom plate (1) to and locate nozzle of refueling locating piece (22), play nozzle of refueling locating piece (22), oil return nozzle of refueling locating piece (21) top, oil return nozzle of pipe locating piece (24), mounting bracket locating piece (25), wherein:

the top of the mounting frame positioning block (25) is provided with a positioning column (251) which is matched with a limiting fixing hole (141) on the mounting frame (14);

the side edges of the refueling pipe orifice positioning block (22), the oil outlet pipe orifice positioning block (23) and the oil return pipe orifice positioning block (24) are respectively provided with an end face detection part which is attached to each pipe orifice on the refueling pipe assembly (1);

positioning holes are respectively formed in the refueling pipe orifice positioning block (22), the oil outlet pipe orifice positioning block (23) and the oil return pipe orifice positioning block (24), and the central axes of the positioning holes are overlapped with the central axis of the corresponding pipe orifice on the refueling pipe assembly (1);

the diameter of a holding rod of the plug gauge is the same as that of the corresponding positioning hole, and the plug gauge comprises a first plug gauge (51) matched with the diameter of the refueling nozzle (11), a second plug gauge (52) matched with the diameter of the oil outlet nozzle (12), and a third plug gauge (53) matched with the diameter of the oil return nozzle (13);

the first plug gauge (51), the second plug gauge (52) and the third plug gauge (53) are respectively aligned with corresponding pipe orifices on the oil filling pipe assembly (1) after being axially limited through corresponding positioning holes.

2. The fuel filler tube assembly gauge of claim 1, wherein the locating hole comprises:

the center axis of the first positioning hole (261) is superposed with the center axis of the filler neck (11), and the diameter of the first positioning hole is larger than the inner diameter of the filler neck (11) and smaller than the outer diameter of the filler neck (11);

a second positioning hole (271) arranged on the oil outlet pipe orifice positioning block (23), wherein the central axis of the second positioning hole coincides with the central axis of the oil outlet pipe orifice (12), and the diameter of the second positioning hole is larger than the inner diameter of the oil outlet pipe orifice (12) and smaller than the outer diameter of the oil outlet pipe orifice (12);

and a third positioning hole (281) arranged in the oil return pipe opening positioning block (24) has a central axis coincident with the central axis of the oil return pipe opening (13), and the diameter of the third positioning hole is larger than the inner diameter of the oil return pipe opening (13) and smaller than the outer diameter of the oil return pipe opening (13).

3. The fuel filler tube assembly gauge of claim 1, wherein the end face detection portion comprises:

a first end face detection part (262) arranged on the side of the filler neck positioning block (22), the bottom of the first end face detection part is attached to the end face of the filler neck (11);

a second end surface detection part (272) arranged on the side edge of the oil outlet pipe orifice positioning block (23), the bottom of which is attached to the end surface of the oil outlet pipe orifice (12);

and a third end surface detection part (282) arranged on the side of the oil return pipe orifice positioning block (24), and the bottom of the third end surface detection part is attached to the end surface of the oil return pipe orifice (13).

4. The fuel filler tube assembly gauge according to any one of claims 1-3, further comprising a feeler that detects a gap between the end face detection portion and each nozzle of the fuel filler tube assembly (1).

5. The check tool for the filler pipe assembly as claimed in any one of claims 1 to 3, further comprising positioning detection members respectively disposed on the filler pipe orifice positioning block (22), and the return pipe orifice positioning block (24) by threaded connection, wherein the positioning detection members are of T-shaped circular tube structures, and are provided with the positioning holes and the end face detection portions.

6. The fuel filling pipe assembly gauge as claimed in any one of claims 1-3, wherein the positioning column (251) is provided with external threads; the mounting frame (14) is sleeved on the positioning column (251) and is screwed and fixed through a nut, so that the oil filling pipe assembly (1) completes mounting and positioning work on the checking fixture (2).

7. The oil filling pipe assembly detection tool according to any one of claims 1 to 3, further comprising a quick pressing mechanism (4) arranged on the base plate, wherein the quick pressing mechanism (4) comprises a pressing base (41), a pulling handle (42), a pressing rod (43), a linkage rod (44) and a pressing head (45);

the mounting frame (14) is sleeved on the positioning column (251), the pulling handle (42) is pushed, and the mounting frame (14) is pressed and fixed by the pressing head (45), so that the oil filling pipe assembly (1) is installed and positioned on the checking fixture (2).

8. A method of detecting a fuel filler tube assembly, comprising the steps of:

s100: the oil filling pipe assembly (1) is positioned and fixed on the detection tool (2), and if the oil filling pipe assembly (1) is not installed successfully, the oil filling pipe assembly is judged to be unqualified; if the installation is successful, carrying out the next detection work;

s200: through the degree of laminating of each mouth of pipe terminal surface of visual inspection mode inspection and corresponding terminal surface detection portion, judge whether radial offset appears in the mouth of pipe: if a clearance angle appears, judging that the pipe orifice is radially deviated and is unqualified; the clearance detected by the feeler gauge exceeds the error range, and the length of the pipeline is judged not to reach the standard and is unqualified; fitting or detecting that the gap width is in an error range by using a feeler gauge, judging that the detection is qualified, and carrying out next detection work;

s300: pass through the spacing back of locating hole with the plug gauge of corresponding specification, make the logical end of its front end fill in corresponding mouth of pipe, judge whether mouth of pipe diameter and position are normal according to the condition of filling in: when the plug does not advance, the oil filling pipe assembly (1) is disassembled to carry out secondary detection on the corresponding pipe orifice, if the plug does not advance, the diameter of the pipe orifice is judged to be smaller, if the plug advances, the axial deviation of the pipe orifice is judged, and the inspection is unqualified; normal stuffing can be performed, the test is qualified, and the next detection work is performed;

s400: plug in the spigot of feeler gauge rear end and correspond the mouth of pipe, judge whether mouth of pipe diameter is bigger than normal according to the condition of plugging in: the stop end can be plugged into the pipe orifice, the pipe orifice diameter is judged to be larger, and the inspection is unqualified; the end stop can not be plugged, the inspection is qualified, and the next detection work is carried out;

s500: and (5) finishing the inspection work, and taking down the oil filling pipe assembly (1).

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