Tubing connection false insertion detection device

Abstract

The application discloses a kind of oil pipe joint virtual insertion detection devices, comprising: cylinder, with cylinder and telescopic rod;Fixed rod, tail is fixed on the cylinder of cylinder;Fixed yoke, it is transversely in the head of fixed rod;Movable pull rod, it is parallel with fixed rod;Movable yoke, it is transversely in the head of movable pull rod, and opposite with fixed yoke;Force limiting mechanism, force limiting mechanism includes: barrel, with guiding cavity in it, the tail of movable pull rod is connected to the upper end of barrel, and the head of telescopic rod is inserted into barrel from the lower end of barrel;Guide disc, it is set in guiding cavity and is connected to the head of telescopic rod;Damping mechanism, it includes spring, permanent magnet, electromagnetic coil;Spring is arranged between guide disc and the lower end of barrel, electromagnetic coil is arranged in the lower end of barrel, permanent magnet is arranged in the bottom of guide disc and opposite with electromagnetic coil, and repulsive force is formed between permanent magnet and electromagnetic coil.

Description

Technical Field

[0001] This invention relates to the field of assembly inspection technology, and in particular to a device for detecting whether an oil pipe joint is loosely inserted. Background Technology

[0002] Before leaving the factory, the fuel tank assembly needs to be connected to all fuel pipe joints. In the existing technology, fuel pipe joints and the fuel tank body are usually assembled and connected by a plug-in method. However, fuel pipe joints often experience a "loose fit" phenomenon, that is, the fuel pipe joint is not properly inserted into the plug hole of the fuel tank body. Therefore, it is necessary to check whether each fuel pipe joint has a loose fit. At present, the main method is to use manual power or a cylinder as a direct power to pull the fuel pipe joint to check whether the fuel pipe joint has a loose fit. However, this method not only cannot accurately detect whether the fuel pipe joint has a loose fit, but it is also time-consuming and labor-intensive. For example, when using a cylinder as a direct pulling power, the gas pressure driving the cylinder is not easy to adjust accurately, resulting in a pulling force that is too large or too small. If the pulling force is too large, the fuel pipe joint is pulled out and judged as a loose fit, when in fact the joint may not be loose. If the pulling force is too small, the fuel pipe joint is not pulled out and judged as not loose, when in fact the joint may be in a loose fit state. Summary of the Invention

[0003] To address the aforementioned technical problems in the prior art, embodiments of the present invention provide a device for detecting loose connections in oil pipe joints.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in the embodiments of the present invention is as follows:

[0005] A device for detecting loose connections in oil pipe joints, comprising:

[0006] A cylinder, which has a cylinder body and a telescopic rod;

[0007] A fixing rod, the tail of which is fixed to the cylinder body of the cylinder;

[0008] A fixed fork is positioned horizontally at the head of the fixed rod;

[0009] A movable tie rod is arranged side-by-side with the fixed rod;

[0010] A movable fork is positioned horizontally at the head of the movable pull rod and opposite to the fixed fork; the fixed fork and the movable fork are used to extend between the oil pipe connector and the oil tank body, the movable fork is used to abut against the oil pipe connector, and the movable pull rod pushes the oil pipe connector outward by moving relative to the fixed fork to remove the oil pipe connector from the insertion hole of the oil tank body.

[0011] A force limiting mechanism is disposed between the telescopic rod of the cylinder and the movable pull rod; the force limiting mechanism includes:

[0012] The cylinder has a guide cavity inside, the tail of the movable pull rod is connected to the upper end of the cylinder, and the head of the telescopic rod extends into the cylinder from the lower end of the cylinder;

[0013] A guide disc, which is disposed in the guide cavity and connected to the head of the telescopic rod;

[0014] A damping mechanism includes a spring, a permanent magnet, and an electromagnetic coil. The spring is positioned between the guide plate and the lower end of the cylinder. The electromagnetic coil is positioned at the lower end of the cylinder. The permanent magnet is positioned at the bottom of the guide plate and opposite to the electromagnetic coil. A magnetic repulsion force is formed between the permanent magnet and the electromagnetic coil. The spring force and the magnetic repulsion force create a downward thrust on the cylinder. This thrust becomes the pulling force transmitted from the telescopic rod to the movable pull rod.

[0015] The damping mechanism limits the tension transmitted from the telescopic rod to the movable tie rod during retraction to within the rated tension.

[0016] The rated pressure is the minimum pulling force required to pull out the inserted oil pipe connector.

[0017] Preferably, when the telescopic rod moves a preset displacement relative to the movable pull rod, the tension transmitted by the damping mechanism increases to the rated tension; the telescopic stroke of the telescopic rod is configured to be equal to the preset displacement.

[0018] Preferably, the lower end of the cylinder is equipped with an infrared sensor that is radially oriented toward the telescopic rod; a scoring ring is provided on the outer periphery of the telescopic rod, and when the telescopic rod moves a preset displacement relative to the movable pull rod, the scoring ring moves with the telescopic rod to a position opposite to the infrared sensor.

[0019] Preferably, the upper end of the cylinder is provided with an upper end cover, the lower end of the cylinder is provided with a lower end cover, and an elastic pad is provided between the upper end cover and the guide plate.

[0020] Preferably, a frame is formed above the lower end cover, and the electromagnetic coil is installed in the frame.

[0021] Preferably, a sliding guide is provided between the fixed rod and the movable pull rod; the sliding guide includes: a sliding sleeve and a clamping sleeve formed on one side of the sliding sleeve, the fixed rod passes through the sliding sleeve, a ball is provided between the fixed rod and the sliding sleeve, and the clamping sleeve covers the movable pull rod and is fixed to the movable pull rod.

[0022] Preferably, a section of optical axis is provided on the fixed rod, and the sliding sleeve of the sliding guide is sleeved on the optical axis; both ends of the optical axis are equipped with retaining rings.

[0023] Preferably, both the fixed fork and the movable fork have notches, and the notches are conical in shape.

[0024] Preferably, the guide disc is connected to the head of the telescopic rod via a screw to adjust the axial position of the guide disc relative to the telescopic rod.

[0025] Preferably, a handle for human hand to hold is installed below the cylinder body.

[0026] Compared with the prior art, the beneficial effects of the oil pipe joint misfit detection device disclosed in this invention are:

[0027] By adding a force limiting mechanism between the movable tie rod and the telescopic rod of the cylinder, the pulling force on the movable tie rod is limited to a certain range, avoiding the influence of changes in the aerodynamic force of the telescopic rod. Therefore, the detection of the insertion status of the oil pipe joint is not affected by the aerodynamic force of the telescopic rod, resulting in accurate detection and convenient operation.

[0028] The overview of various implementations or examples of the technology described in this invention is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0029] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the invention. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0030] Figure 1 This is a schematic diagram of the structure of the oil pipe joint misfit detection device provided in an embodiment of the present invention.

[0031] Figure 2 for Figure 1 A-direction view.

[0032] Figure 3 This is a usage view of the oil pipe joint misfit detection device provided in an embodiment of the present invention.

[0033] Figure 4This is a view showing the state of the oil pipe joint being properly inserted, provided by the oil pipe joint insertion detection device in an embodiment of the present invention.

[0034] Figure 5 The image provided in the embodiment of the present invention shows the state view of the oil pipe joint misalignment detection device for determining the misalignment of the oil pipe joint.

[0035] Figure label:

[0036] 10-Cylinder; 11-Telescopic rod; 21-Fixed rod; 211-Optical axis; 22-Modible pull rod; 31-Fixed shift fork; 32-Modible shift fork; 33-Notch; 40-Force limiting mechanism; 41-Cylinder body; 411-Upper end cover; 412-Lower end cover; 42-Guide plate; 43-Spring; 441-Permanent magnet; 442-Electromagnetic coil; 45-Frame; 46-Elastic pad; 51-Infrared sensor; 52-Scratched marking ring; 60-Sliding guide; 61-Sliding sleeve; 62-Ball bearing; 63-Clamping sleeve; 70-Handle; 100-Oil pipe connector; 200-Oil tank body. Detailed Implementation

[0037] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0039] like Figures 1 to 3 As shown, an embodiment of the present invention discloses an oil pipe joint misalignment detection device, which includes: a cylinder 10, a fixed rod 21, a movable pull rod 22, a fixed shift fork 31, a movable shift fork 32, a force limiting mechanism 40, and a handle 70.

[0040] The handle 70 is installed below the cylinder body of the cylinder 10. The handle 70 is for human hand to hold, so as to facilitate manual operation of the detection device. The telescopic rod 11 of the cylinder 10 is used to extend and retract from the top of the cylinder body.

[0041] The tail (lower end) of the fixed rod 21 is fixed to the upper end of the cylinder body of the cylinder 10 and is vertically arranged. The fixed fork 31 is horizontally placed at the head of the fixed rod 21. The movable pull rod 22 is arranged side by side with the fixed rod 21. The movable fork 32 is horizontally placed at the head of the movable pull rod 22. The movable fork 32 is opposite to the fixed fork 31 and is located below the fixed fork 31. When the telescopic rod 11 of the cylinder 10 is in the extended state, the movable fork 32 and the fixed fork 31 are roughly stacked. At this time, the two forks can be simultaneously inserted between the oil pipe connector 100 and the oil tank body 200, which are in the insertion state. The fixed fork 31 faces the oil tank body 200, and the movable fork 32 faces the oil pipe connector 100. It is readily understood that when the movable fork 32 is subjected to sufficient tension to move downward relative to the fixed fork 31, the movable fork 32 pushes downward against the oil pipe connector 100, causing the oil pipe connector 100 to separate from the fuel tank body 200, i.e., the oil pipe connector 100 is pulled out. Preferably, both the movable fork 32 and the fixed fork 31 have notches 33 extending inward from the outside. Thus, after the two forks are inserted between the fuel tank body 200 and the oil pipe connector 100, the two forks are located in the outer periphery of the oil pipe connector 100, thereby making full contact with the oil pipe connector 100 and the fuel tank body 200. More preferably, the notch 33 is configured in a conical shape, which facilitates the fork insertion to be adapted to oil pipe connectors 100 with different outer diameters.

[0042] A force limiting mechanism 40 is disposed between the telescopic rod 11 of the cylinder 10 and the tail of the movable pull rod 22. This force limiting mechanism 40 transmits the pulling force exerted by the telescopic rod 11 on the movable pull rod 22 when the telescopic rod 11 retracts, and limits the pulling force of the telescopic rod 11 on the movable pull rod 22 to within the rated pulling force. The rated pulling force is the minimum pulling force required to pull out the inserted oil pipe connector 100. Ignoring friction and gravity, since the pushing force of the movable fork 32 on the oil pipe connector 100 (relative to the pulling force on the oil pipe connector 100) is approximately equal to the pulling force of the telescopic rod 11 on the movable pull rod 22, the force limiting mechanism 40 limits the pushing force of the movable fork 32 on the oil pipe connector 100 to within the rated pulling force.

[0043] The force limiting mechanism 40 includes: a cylinder 41, a guide plate 42, a spring 43, a permanent magnet 441, and an electromagnetic coil 442. An upper end cover 411 is fixed to the upper end of the cylinder 41, and a lower end cover 412 is fixed to the lower end of the cylinder 41. A frame 45 is formed above the lower end cover 412. The tail of the movable pull rod 22 is fixedly connected to the upper end cover 411 of the cylinder 41. The upper end of the telescopic rod 11 of the cylinder 10 extends into the cylinder 41 from the lower end of the cylinder 41. A guide plate 42 is disposed in the cylinder 41 and connected to the upper end of the telescopic rod 11. A spring 43 is disposed in the cylinder 41 and is located between the guide plate 42 and the frame 45, thereby providing a downward thrust to the cylinder 41. An electromagnetic coil 442 is installed in the frame 45. A permanent magnet 441 is installed in the guide plate 42 and is opposite to the electromagnetic coil 442. By energizing the electromagnetic coil 442, a magnetic repulsion force is generated between the permanent magnet 441 and the electromagnetic coil 442. This magnetic repulsion force forms a downward thrust on the cylinder 41. Thus, the elastic force of the spring 43 and the magnetic repulsion force of the magnet become the thrust force that pushes the cylinder 41 downward. Therefore, when the telescopic rod 11 retracts, the telescopic rod 11 transmits the pulling force to the movable pull rod 22 by means of this thrust force, and the pulling force is equal to the thrust force.

[0044] The thrust variation formed by the elastic force and magnetic repulsion is configured such that if the movable fork 32 remains stacked with the fixed fork 31 (i.e., the movable fork 32 is not separated from the fixed fork 31), the thrust increases to the aforementioned rated tension when the telescopic rod 11 switches from the extended limit position to the retracted limit position. At this time, the displacement of the telescopic rod 11 relative to the cylinder 41 and the movable pull rod 22 is equal to the retraction stroke of the telescopic rod 11.

[0045] An infrared sensor 51 facing the telescopic rod 11 is installed below the lower end cover 412. A scoring ring 52 is provided on the outer periphery of the telescopic rod 11. If the movable fork 32 is kept in the stacked state with the fixed fork 31, when the telescopic rod 11 moves relative to the movable pull rod 22 to a displacement equal to the retraction stroke, the scoring ring 52 moves with the telescopic rod 11 to a position opposite to the infrared sensor 51. At this time, the tension transmitted by the telescopic rod 11 to the movable pull rod 22 and the movable fork 32 through the force limiting mechanism 40 is the rated tension.

[0046] Based on the above, it can be seen that the telescopic rod 11 indirectly transmits the tension to the movable rod 22 through the force limiting mechanism 40, and the tension transmitted to the movable rod 22 is not affected by the aerodynamic force of the cylinder 10 on the telescopic rod 11, and the maximum tension transmitted to the movable rod 22 is the rated tension.

[0047] The following describes how to use the above-mentioned detection device.

[0048] First, a person holds the handle 70 of the detection device, so that the fixed fork 31 and the movable fork 32, which are in a stacked state, are inserted into the gap between the oil tank body 200 and the oil pipe connector 100.

[0049] The cylinder 10 is controlled to retract its extension rod 11.

[0050] If, after the telescopic rod 11 retracts to its limit position, the movable pull rod 22 is not pulled and the movable fork 32 does not push the oil pipe connector 100, it indicates that the oil pipe connector 100 has been properly inserted. This is because, after the telescopic rod 11 retracts to its limit position, the pulling force transmitted from the telescopic rod 11 to the movable pull rod 22 through the force limiting mechanism 40 has reached the rated pulling force. Even with this rated pulling force, the oil pipe connector 100 has not been pulled out, indicating that it has been properly inserted. Additionally, after the telescopic rod 11 retracts to its limit position, the scoring ring 52 moves to a position opposite to the infrared sensor. At this time, the infrared sensor 51 detects the scoring ring 52, thereby transmitting the signal to the detection system in the laboratory, thus calibrating that the oil pipe connector 100 has been installed correctly.

[0051] If, during the retraction of the telescopic rod 11 to its limit position, the movable fork 32 is pulled, causing the oil pipe connector 100 to separate from the oil tank body 200, it indicates that the oil pipe connector 100 is not properly inserted. This is because, during the retraction of the telescopic rod 11, the force transmitted from the telescopic rod 11 to the movable pull rod 22 through the force limiting mechanism 40 is less than the rated force. If the oil pipe connector 100 is pulled out at this time, it indicates that the oil pipe connector 100 was pulled out under the specified force, thus indicating that the oil pipe connector 100 is not properly inserted. Furthermore, since the force transmitted from the telescopic rod 11 to the movable pull rod 22 does not reach the rated force, the marking ring 52 will not move to the position opposite to the infrared sensor 51. At this time, the infrared sensor 51 does not receive a signal, thus marking the oil pipe connector 100 as improperly inserted.

[0052] In some preferred embodiments, an elastic pad 46 is provided between the guide plate 42 and the upper end cover 411. During the extension of the telescopic rod 11, the spring 43 pad is used to relieve the impact of the head of the telescopic rod 11 on the upper end cover 411.

[0053] In some preferred embodiments, the guide plate 42 is connected to the head of the telescopic rod 11 by a screw, so that the axial position between the guide plate 42 and the head of the telescopic rod 11 can be adjusted. Thus, after the telescopic rod 11 is extended, the distance between the movable fork 32 and the fixed fork 31 can be adjusted.

[0054] In some preferred embodiments, a sliding guide 60 is installed between the fixed rod 21 and the movable pull rod 22. The sliding guide 60 includes a sliding sleeve 1 and a clamping sleeve 63 formed on one side of the sliding sleeve 61. The fixed rod 21 passes through the sliding sleeve 61, and a ball bearing 62 is installed between the fixed rod 21 and the sliding sleeve 61. The clamping sleeve 63 covers the movable pull rod 22 and is fixed to it. The sliding guide 60 is used to maintain the relative position of the fixed rod 21 and the movable pull rod 22. Preferably, a section of optical shaft 211 is provided on the fixed rod 21, and the sliding sleeve 61 of the sliding guide 60 is sleeved on the optical shaft 211. Both ends of the optical shaft 211 are equipped with retaining rings.

[0055] The key advantages of the oil pipe joint testing device provided by this invention are:

[0056] By adding a force limiting mechanism 40 between the movable pull rod 22 and the telescopic rod 11 of the cylinder 10, the pulling force on the movable pull rod 22 is limited to a certain range, avoiding the influence of the aerodynamic changes of the telescopic rod 11. Therefore, the detection of the insertion state of the oil pipe joint 100 will not be affected by the aerodynamic force of the telescopic rod 11, and the detection is accurate and the operation is convenient.

[0057] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A device for detecting loose connections in oil pipe joints, characterized in that, include: A cylinder, which has a cylinder body and a telescopic rod; A fixing rod, the tail of which is fixed to the cylinder body of the cylinder; A fixed fork is positioned horizontally at the head of the fixed rod; A movable tie rod is arranged side-by-side with the fixed rod; A movable fork is positioned horizontally at the head of the movable pull rod and opposite to the fixed fork; the fixed fork and the movable fork are used to extend between the oil pipe connector and the oil tank body, the movable fork is used to abut against the oil pipe connector, and the movable pull rod pushes the oil pipe connector outward by moving relative to the fixed fork to remove the oil pipe connector from the insertion hole of the oil tank body. A force limiting mechanism is disposed between the telescopic rod of the cylinder and the movable pull rod; the force limiting mechanism includes: The cylinder has a guide cavity inside, the tail of the movable pull rod is connected to the upper end of the cylinder, and the head of the telescopic rod extends into the cylinder from the lower end of the cylinder; A guide disc, which is disposed in the guide cavity and connected to the head of the telescopic rod; A damping mechanism includes a spring, a permanent magnet, and an electromagnetic coil. The spring is positioned between the guide plate and the lower end of the cylinder. The electromagnetic coil is positioned at the lower end of the cylinder. The permanent magnet is positioned at the bottom of the guide plate and opposite to the electromagnetic coil. A magnetic repulsion force is formed between the permanent magnet and the electromagnetic coil. The spring force and the magnetic repulsion force create a downward thrust on the cylinder. This thrust becomes the pulling force transmitted from the telescopic rod to the movable pull rod. The damping mechanism limits the tension transmitted from the telescopic rod to the movable tie rod during retraction to within the rated tension. The rated pull force is the minimum pull force required to pull out the inserted oil pipe connector.

2. The oil pipe joint loose insertion detection device according to claim 1, characterized in that, When the telescopic rod moves a preset displacement relative to the movable pull rod, the tension transmitted by the damping mechanism increases to the rated tension; the telescopic stroke of the telescopic rod is configured to be equal to the preset displacement.

3. The oil pipe joint loose insertion detection device according to claim 2, characterized in that, The lower end of the cylinder is equipped with an infrared sensor that is radially oriented toward the telescopic rod; a scoring ring is provided on the outer periphery of the telescopic rod, and when the telescopic rod moves a preset displacement relative to the movable pull rod, the scoring ring moves with the telescopic rod to a position opposite to the infrared sensor.

4. The oil pipe joint loose insertion detection device according to claim 1, characterized in that, The upper end of the cylinder is provided with an upper end cover, the lower end of the cylinder is provided with a lower end cover, and an elastic pad is provided between the upper end cover and the guide plate.

5. The oil pipe joint loose insertion detection device according to claim 4, characterized in that, A frame is formed above the lower end cover, and the electromagnetic coil is installed in the frame.

6. The oil pipe joint loose insertion detection device according to claim 1, characterized in that, A sliding guide is installed between the fixed rod and the movable pull rod; the sliding guide includes a sliding sleeve and a clamping sleeve formed on one side of the sliding sleeve, the fixed rod passes through the sliding sleeve, a ball is installed between the fixed rod and the sliding sleeve, and the clamping sleeve covers the movable pull rod and is fixed to the movable pull rod.

7. The oil pipe joint loose insertion detection device according to claim 6, characterized in that, A section of optical axis is provided on the fixed rod, and the sliding sleeve of the sliding guide is fitted on the optical axis; both ends of the optical axis are equipped with retaining rings.

8. The oil pipe joint loose insertion detection device according to claim 1, characterized in that, Both the fixed shift fork and the movable shift fork have notches, and the notches are conical in shape.

9. The oil pipe joint loose insertion detection device according to claim 1, characterized in that, The guide plate is connected to the head of the telescopic rod by a screw to adjust the axial position of the guide plate relative to the telescopic rod.

10. The oil pipe joint loose insertion detection device according to claim 1, characterized in that, A handle for holding is installed at the bottom of the cylinder body.

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