Engine oil pipe detection device capable of continuously detecting air tightness and method thereof

Abstract

The invention discloses an engine oil pipe detection device capable of continuously detecting air tightness and a method thereof, and belongs to the technical field of air tightness detection. A material moving device is arranged on the top of the rack, and a plurality of double-station profiling positioning jigs are evenly arranged at the moving end of the material moving device at equal intervals. An automatic avoiding clamping mechanism is arranged on the double-station profiling positioning jig; the automatic avoiding clamping mechanism comprises a control assembly and an avoiding clamping assembly, in this way, the control assembly controls the avoiding clamping assembly to achieve automatic clamping and releasing of the oil pipes, the control assembly is matched with the material moving device to achieve continuous detection operation of the oil pipes, two oil pipes can be accurately positioned at a time, and the detection efficiency is effectively improved; after the head of the conical plug is inserted into the connector, the inner supporting pipe extends into the conical groove to support the conical plug from the inside, so that the outer wall of the conical plug is tightly attached to the inner wall of the connector, the sealing effect on the oil pipe is ensured, and high-precision airtightness detection on the oil pipe is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, and in particular to an engine oil pipe detection device and method capable of continuously detecting air tightness. Background Art

[0002] The engine oil pipe is an important pipeline connecting various engine components. It is generally made of high-temperature and high-pressure resistant metal pipes. It is formed by a bending machine and then joints are installed at both ends.

[0003] Chinese patent CN208333545U discloses an intelligent automatic engine oil pipe inspection line, which is equipped with a feeding device, a detection mechanism, a conveying device and an assembly mechanism in sequence. The detection mechanism includes an appearance detection component, a size detection component, an air tightness detection component, a permeability detection component and a control device, so that the detection mechanism has the automatic detection function of appearance, size, air tightness and permeability, forming an oil pipe inspection line; however, the detection line still has the following problems:

[0004] 1. The engine oil pipe has a complex configuration after multiple bending processes, which can easily cause displacement during material transfer and testing, thus affecting the testing results;

[0005] 2. When testing the air tightness of the oil pipe, the sealing effect of the oil pipe is usually achieved by pushing the sealing block to tightly press the oil pipe interface. Excessive clamping force will not only damage the oil pipe, but also the rubber sealing structure at the end of the sealing port will be easily damaged after repeated use.

[0006] Based on this, the present invention designs an engine oil pipe detection device and method capable of continuously detecting air tightness to solve the above-mentioned problem. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides an engine oil pipe detection device and method capable of continuously detecting air tightness.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] An engine oil pipe detection device capable of continuously detecting air tightness, a frame;

[0010] A material moving device is provided on the top of the frame;

[0011] A plurality of double-station profiling positioning jigs are evenly arranged at equal intervals on the moving end of the material transfer device, which can place two oil pipes at a time and position the oil pipes;

[0012] The double-station profiling positioning fixture is provided with an automatic avoidance clamping mechanism which can automatically and synchronously clamp and release two oil pipes on the double-station profiling positioning fixture;

[0013] The automatic avoidance clamping mechanism includes a control component and an avoidance clamping component. Two groups of avoidance clamping components are arranged at the upper end of the double-station profiling positioning fixture for fastening the oil pipe to the double-station profiling positioning fixture. The control component is arranged at the lower side of the double-station profiling positioning fixture and connected to the lower ends of the two groups of avoidance clamping components. The control component is used to control the avoidance clamping component to clamp and release the oil pipe.

[0014] A high-precision airtightness detection mechanism for airtightness detection of the oil pipe is arranged on the side of the frame.

[0015] Furthermore, the double-station contour positioning fixture includes a base plate, a support block and a contour positioning structure. The base plate is connected to the movable end of the material transfer device through a connecting piece, and a support block is fixedly installed on one end of the base plate; two groups of contour positioning structures for positioning the oil pipe are arranged on the upper ends of the base plate and the support block.

[0016] Furthermore, the contoured positioning structure includes a contoured groove and a positioning block. The upper ends of the base plate and the support block begin to have contoured grooves for cooperating in positioning the oil pipe, and both ends of the contoured grooves are fixedly installed with positioning blocks for limiting the joints of the oil pipe.

[0017] Furthermore, the avoidance clamping assembly includes a cylinder seat, a connecting rod, a connecting block, a pressure plate, a pressure block, a connecting plate, a limit pin and a limit groove. The cylinder seat is fixedly mounted on the upper end of the base plate and is located between the two profiling grooves. The inner side of the cylinder seat is limitedly and slidably connected with a connecting rod, the upper end of the connecting rod is fixedly mounted with a connecting block, and pressure plates are symmetrically fixedly mounted on both sides of the connecting block; a pressure block for pressing the oil pipe tightly in the profiling groove is fixedly mounted on the end of the pressure plate away from the connecting block; the lower ends of the connecting rods of the two sets of avoidance clamping assemblies are rotatably connected to the same connecting plate through bearings.

[0018] Furthermore, the limit pin is fixedly connected to the connecting rod, and the side wall of the cylinder seat is provided with a limit groove which is slidably connected to the limit pin; the limit groove is composed of an upper oblique groove and a lower vertical groove.

[0019] Furthermore, the control assembly includes a slide bar and a slide groove, the two slide bars are symmetrically fixedly mounted on the left and right ends of the connecting plate, and a slide groove is provided on the side of the frame to be limitedly slidably connected with the slide bar;

[0020] The slide is composed of a low-position clamping section, a high-position release section and a transition section. The high-position release section is located on both sides of the high-precision airtightness detection mechanism, the low-position clamping section is located between the high-position release sections, and the low-position clamping section and the high-position release section are connected by a transition section; the height of the low-position clamping section is lower than the height of the high-position release section.

[0021] Furthermore, the high-precision airtight detection mechanism includes a support, a cylinder, a connecting seat, an air pipe and an inner support sealing assembly. The two supports are arranged on the left and right sides of the frame, and the cylinder is fixedly installed on the upper end of the support; the connecting seat is fixedly installed on the output end of the cylinder; two sealing assemblies for respectively sealing the joints of the two oil pipes on the substrate are arranged at the end of the connecting seat facing the substrate; and air pipes for cooperating with the two sealing assemblies are also fixedly installed on the connecting seat.

[0022] Furthermore, the internal support sealing assembly includes a conical plug, a conical groove, an internal support tube and a spring. Two conical plugs are provided at the end of the connecting seat facing the substrate, which are used to seal the joints of the two oil pipes on the substrate respectively; a conical groove is provided in the conical plug, one end of the internal support tube is slidingly connected to the conical groove, and the other end of the internal support tube is fixedly connected to the connecting seat; the spring is sleeved on the outside of the internal support tube, and the two ends of the spring are respectively fixedly connected to the connecting seat and the conical plug.

[0023] Furthermore, the head diameter of the conical plug is smaller than the inner diameter of the trachea joint, and the conical plug is made of elastic rubber material; the interior of the inner support tube and the conical groove constitute an air path connected to the trachea, and the trachea is connected to the airtightness detector.

[0024] In order to better achieve the purpose of the present invention, the present invention also provides a method for using an engine oil pipe detection device capable of continuously detecting air tightness, comprising the following steps:

[0025] Step 1: Place the oil pipe in the profiling groove at the feeding end of the material transfer device, and clamp the joints at both ends of the oil pipe in the positioning block. The shape and size of the oil pipe are judged to be qualified by the degree of fit between the oil pipe and the profiling groove;

[0026] Step 2: The material moving device drives the base plate to move, and the slide bar slides in the slide slot. When the slide bar slides from the high-position release section of the slide slot to the low-position clamping section, the slide bar drives the two connecting rods to move downward through the connecting plate, and the limit pins slide in the oblique groove and the vertical groove of the limit groove in turn, so that the connecting rod drives the pressure block to move downward and rotates to the top of the oil pipe. Then the connecting rod drives the pressure block to move vertically downward, pressing the oil pipes on both sides tightly in the profiling groove to fix the oil pipes;

[0027] Step 3: The base plate is moved to the set position, and the conical plug is aligned with the joint of the oil pipe;

[0028] Step 4: The cylinder controls the connection seat to move toward the oil pipe, so that the head of the conical plug is inserted into the joint. When the conical plug is blocked, the connection seat continues to move, so that the inner support tube extends into the conical groove to support the conical plug from the inside, so that the outer wall of the conical plug fits tightly with the inner wall of the joint to seal the oil pipe; the air tightness detector injects air into the oil pipe through the air pipe and the air path to perform air tightness detection on the oil pipe;

[0029] Step 5: The cylinder controls the connector to reset. Under the elastic action of the spring, the inner support tube retracts from the tapered groove. The side wall of the tapered plug is no longer tightly fitted with the joint. Finally, the tapered plug is separated from the joint, completing the entire airtightness detection operation.

[0030] Step 6: The material moving device drives the base plate to move toward its feeding end, and the slide bar slides from the low-position clamping section into the high-position release section to move the connecting rod upward. The connecting plate releases the oil pipe and resets to avoid the oil pipe, so that the oil pipe can be smoothly moved.

[0031] Compared with the prior art, the present invention has the following beneficial effects: 1. Automatic clamping and releasing of the oil pipe is achieved by controlling the avoidance clamping assembly through the control assembly, and continuous inspection of the oil pipe is achieved in cooperation with the material shifting device, and two oil pipes can be accurately positioned at one time, which effectively improves the inspection efficiency and increases the inspection accuracy.

[0032] 2. The degree of fit between the oil pipe and the contoured groove can be used to determine whether the size and bending angle data of the oil pipe are qualified. During the airtightness test, the joint of the oil pipe will be blocked and limited by the positioning block to prevent the oil pipe from being deformed by force.

[0033] 3. After the head of the conical plug is inserted into the joint, the inner support tube is extended into the conical groove to prop up the conical plug from the inside, so that the outer wall of the conical plug fits tightly with the inner wall of the joint, ensuring the sealing effect of the oil pipe, realizing high-precision airtightness detection of the oil pipe, and making it easy to detach the conical plug from the joint of the oil pipe, reducing the possibility of damage to the conical plug and increasing the service life of the conical plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A three-dimensional diagram of an engine oil pipe detection device capable of continuously detecting air tightness according to the present invention;

[0036] Figure 2 It is a front view of an engine oil pipe detection device capable of continuously detecting air tightness of the present invention;

[0037] Figure 3 A three-dimensional diagram of the double-station profiling positioning fixture of the present invention;

[0038] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0039] Figure 5 is a perspective view of a control assembly of the present invention;

[0040] Figure 6 A three-dimensional diagram of the high-precision airtightness detection mechanism of the present invention;

[0041] Figure 7 It is a half-section view of the conical plug of the present invention.

[0042] The numbers in the figure represent:

[0043] 1. Frame; 2. Material transfer device; 3. Double-station profiling positioning fixture; 31. Base plate; 32. Support block; 33. Profiling groove; 34. Positioning block; 4. Automatic avoidance clamping mechanism; 41. Control component; 411. Slide rod; 412. Slide groove; 4121. Low-position clamping section; 4122. High-position release section; 4123. Transition section; 42. Avoidance clamping component; 421. Cylinder seat; 422. Connecting rod ; 423, connecting block; 424, pressure plate; 425, pressure block; 426, connecting plate; 427, limit pin; 428, limit groove; 4281, oblique groove; 4282, vertical groove; 5, high-precision airtightness detection mechanism; 51, support; 52, cylinder; 53, connecting seat; 54, air pipe; 55, conical plug; 56, conical groove; 57, inner support tube; 58, air path; 59, spring; 6, oil pipe. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0046] Embodiment 1: In some embodiments, please refer to the drawings of the specification Figure 1-Figure 5 , an engine oil pipe detection device capable of continuously detecting air tightness, comprising a frame 1;

[0047] A material transfer device 2 is provided on the top of the frame 1, and the material transfer device 2 adopts a double-speed chain conveyor or a belt conveyor;

[0048] A plurality of double-station profiling positioning jigs 3 are evenly arranged at equal intervals on the moving end of the material transfer device 2, which can place two oil pipes 6 at a time and position the oil pipes 6;

[0049] The double-station profiling positioning fixture 3 is provided with an automatic avoidance clamping mechanism 4 which can automatically and synchronously clamp and release two oil pipes 6 on the double-station profiling positioning fixture 3;

[0050] The automatic avoidance clamping mechanism 4 includes a control component 41 and an avoidance clamping component 42. The two groups of avoidance clamping components 42 are arranged at the upper end of the double-station profiling positioning fixture 3 to fasten the oil pipe 6 to the double-station profiling positioning fixture 3. The control component 41 is arranged at the lower side of the double-station profiling positioning fixture 3 and connected to the lower ends of the two groups of avoidance clamping components 42. The control component 41 is used to control the avoidance clamping component 42 to clamp and release the oil pipe 6.

[0051] A high-precision airtightness detection mechanism 5 for performing airtightness detection on the oil pipe 6 is provided on the side of the frame 1;

[0052] In the present invention, the operator places two oil pipes 6 on the double-station profiling positioning fixture 3 at the feeding end of the material transfer device 2, and realizes the appearance detection of the oil pipe 6 through the profiling design of the double-station profiling positioning fixture 3. If the oil pipe 6 is tightly fitted with the substrate 31, it means that the data such as the size and bending angle of the oil pipe 6 meet the set value;

[0053] At the feeding end, the avoidance clamping component 42 is in a released state, and the avoidance clamping component 42 avoids the oil pipe 6 so that the oil pipe 6 can be smoothly placed on the double-station profiling positioning fixture 3. In the process of the material shifting device 2 driving the base plate 31 to move, the control component 41 controls the avoidance clamping component 42 to press the oil pipe 6 down and fasten it on the double-station profiling positioning fixture 3, so as to achieve precise positioning of two oil pipes 6 at one time, ensuring the smooth performance of the gas inspection of the oil pipe 6 by the high-precision airtightness detection mechanism 5, and after the gas inspection is completed, the control component 41 controls the avoidance clamping component 42 to automatically release the oil pipe 6, so as to smoothly perform the material shifting operation of the oil pipe 6 at the discharging end.

[0054] The double-station profiling positioning fixture 3 includes a base plate 31, a support block 32 and a profiling positioning structure. The base plate 31 is connected to the moving end of the material moving device 2 through a connecting piece, and the support block 32 is fixedly installed at one end of the base plate 31; the upper ends of the base plate 31 and the support block 32 are provided with two groups of profiling positioning structures for positioning the oil pipe 6;

[0055] The profiling positioning structure includes a profiling groove 33 and a positioning block 34. The upper ends of the base plate 31 and the support block 32 are provided with a profiling groove 33 for cooperating in positioning the oil pipe 6. Both ends of the profiling groove 33 are fixedly installed with positioning blocks 34 for limiting the joint of the oil pipe 6. The oil pipe 6 is placed in the profiling groove 33. If the oil pipe 6 fits tightly with the profiling groove 33 and the joints at both ends of the oil pipe 6 are stuck in the positioning blocks 34, the data such as the size and bending angle of the oil pipe 6 are qualified. In addition, during the airtightness detection, the joint of the oil pipe 6 will be blocked and limited by the positioning block 34 to prevent the oil pipe 6 from being deformed by force.

[0056] The avoidance clamping assembly 42 comprises a cylinder seat 421, a connecting rod 422, a connecting block 423, a pressure plate 424, a pressure block 425, a connecting plate 426, a limiting pin 427 and a limiting groove 428. The cylinder seat 421 is fixedly mounted on the upper end of the base plate 31 and is located between the two profiling grooves 33. The inner side of the cylinder seat 421 is limitedly slidably connected with a connecting rod 422, the upper end of the connecting rod 422 is fixedly mounted with a connecting block 423, and the two sides of the connecting block 423 are symmetrically fixedly mounted with pressure plates 424; the end of the pressure plate 424 away from the connecting block 423 is fixedly mounted with a pressure block 425 for pressing the oil pipe 6 tightly in the profiling groove 33; the lower ends of the connecting rods 422 of the two sets of avoidance clamping assemblies 42 are rotatably connected to the same connecting plate 426 through bearings;

[0057] The limiting pin 427 is fixedly connected to the connecting rod 422, and the side wall of the cylinder seat 421 is provided with a limiting groove 428 which is limitedly and slidably connected to the limiting pin 427;

[0058] The limiting groove 428 is composed of an oblique groove 4281 on the upper side and a vertical groove 4282 on the lower side;

[0059] The control component 41 includes a slide rod 411 and a slide groove 412. The two slide rods 411 are symmetrically fixedly installed on the left and right ends of the connecting plate 426. The side of the frame 1 is provided with a slide groove 412 which is limitedly slidably connected to the slide rod 411; preferably, the slide rod 411 is provided with a bearing at the end, and the slide rod 411 is connected to the slide groove 412 through the bearing.

[0060] The slide 412 is composed of a low-position clamping section 4121, a high-position release section 4122 and a transition section 4123. The high-position release section 4122 is located on both sides of the high-precision airtightness detection mechanism 5. The low-position clamping section 4121 is located between the high-position release sections 4122. The low-position clamping section 4121 and the high-position release section 4122 are connected by the transition section 4123. The height of the low-position clamping section 4121 is lower than that of the high-position release section 4122.

[0061] In the present invention, at the feeding end of the material moving device 2, the pressing plate 424 is parallel to the middle end of the profiling groove 33, and the oil pipe 6 can be smoothly placed in the profiling groove 33; in the process of the material moving device 2 moving the base plate 31, the sliding rod 411 slides in the sliding groove 412, and when the sliding rod 411 slides from the high-position release section 4122 of the sliding groove 412 to the low-position clamping section 4121, the sliding rod 411 drives the connecting plate 426 to move downward, so that the connecting plate 426 drives the two connecting rods 422 to move downward at the same time, and the limiting pin 427 is sequentially in the inclined groove 4281 of the limiting groove 428 and slide in the vertical groove 4282, so that the connecting rod 422 drives the pressure block 425 to move downward and rotate to the top of the oil pipe 6, and then the connecting rod 422 drives the pressure block 425 to move vertically downward, pressing the oil pipes 6 on both sides tightly in the profiling groove 33, so as to achieve the fixing effect of the oil pipe 6; after the oil pipe 6 is air-tightly tested, the sliding rod 411 slides from the low-position clamping section 4121 into the high-position releasing section 4122, so that the connecting rod 422 moves upward, and the connecting plate 426 releases the oil pipe 6 and resets to avoid the oil pipe 6, so as to carry out the material moving operation on the oil pipe 6.

[0062] Embodiment 2: In some embodiments, Figure 6 and Figure 7 As shown, as a preferred embodiment of the present invention,

[0063] The high-precision airtight detection mechanism 5 includes a support 51, a cylinder 52, a connecting seat 53, an air pipe 54, a conical plug 55, a conical groove 56, an inner support tube 57, an air path 58 and a spring 59. The two supports 51 are arranged on the left and right sides of the frame 1. The cylinder 52 is fixedly installed on the upper end of the support 51; the connecting seat 53 is fixedly installed on the output end of the cylinder 52; the connecting seat 53 is provided with two conical plugs 55 for respectively plugging the joints of the two oil pipes 6 on the base plate 31 at one end facing the base plate 31; the head diameter of the conical plug 55 is smaller than the inner diameter of the air pipe 54 joint, and the conical plug 55 is set to be made of elastic rubber material; the air pipes 54 for matching the two conical plugs 55 are also fixedly installed on the connecting seat 53;

[0064] A conical groove 56 is provided in the conical plug 55, one end of the inner support tube 57 is limitedly slidably connected to the conical groove 56, and the other end of the inner support tube 57 is fixedly connected to the connecting seat 53; a spring 59 is sleeved on the outer side of the inner support tube 57, and the two ends of the spring 59 are respectively fixedly connected to the connecting seat 53 and the conical plug 55; the interior of the inner support tube 57 and the conical groove 56 form an air passage 58 connected to the air pipe 54, and the air pipe 54 is connected to the airtightness detector;

[0065] In the present invention, when the base plate 31 moves to the set position, the conical plug 55 is aligned with the joint of the oil pipe 6, and the cylinder 52 controls the connecting seat 53 to move in the direction of the oil pipe 6, so that the head of the conical plug 55 is inserted into the joint. When the conical plug 55 is blocked, the connecting seat 53 continues to move, so that the inner support tube 57 extends into the conical groove 56 to support the conical plug 55 from the inside, so that the outer wall of the conical plug 55 is tightly fitted with the inner wall of the joint to ensure the sealing effect of the oil pipe 6; then the air tightness detector injects air into the oil pipe 6 through the air pipe 54 and the air path channel 58 to perform an air tightness detection operation on the oil pipe 6. Industry; after the detection is completed, the cylinder 52 controls the connection seat 53 to reset, and the inner support tube 57 retracts from the tapered groove 56 under the elastic action of the spring 59, so that the side wall of the tapered plug 55 is no longer tightly fitted with the joint, and finally the tapered plug 55 is separated from the joint, completing the entire airtight detection operation; the cooperation between the tapered plug 55 and the inner support tube 57 effectively increases the sealing effect of the oil pipe 6 during the airtight detection, realizes the high-precision airtight detection of the oil pipe 6, and makes it easy for the tapered plug 55 to be separated from the joint of the oil pipe 6, reduces the possibility of damage to the tapered plug 55, and increases the service life of the tapered plug 55.

[0066] Embodiment 3: In some embodiments, Figure 1-Figure 7 As shown, as a preferred embodiment of the present invention, a method for using an engine oil pipe detection device capable of continuously detecting air tightness comprises the following steps:

[0067] Step 1: Place the oil pipe 6 in the profiling groove 33 at the feeding end of the material transfer device 2, and clamp the joints at both ends of the oil pipe 6 in the positioning block 34, and judge whether the shape and size of the oil pipe 6 are qualified by the degree of matching between the oil pipe 6 and the profiling groove 33;

[0068] Step 2: The material moving device 2 drives the base plate 31 to move, and the slide bar 411 slides in the slide groove 412. When the slide bar 411 slides from the high-position release section 4122 of the slide groove 412 to the low-position clamping section 4121, the slide bar 411 drives the two connecting rods 422 to move downward through the connecting plate 426, and the limiting pin 427 slides in the oblique groove 4281 and the vertical groove 4282 of the limiting groove 428 in turn, so that the connecting rod 422 drives the pressing block 425 to move downward and rotate to the top of the oil pipe 6 at the same time, and then the connecting rod 422 drives the pressing block 425 to move vertically downward, and the oil pipes 6 on both sides are pressed tightly in the profiling groove 33 to fix the oil pipes 6;

[0069] Step 3: The base plate 31 is moved to a set position, and the conical plug 55 is aligned with the joint of the oil pipe 6;

[0070] Step 4: The cylinder 52 controls the connection seat 53 to move toward the oil pipe 6, so that the head of the conical plug 55 is inserted into the joint. When the conical plug 55 is blocked, the connection seat 53 continues to move, so that the inner support tube 57 extends into the conical groove 56 to support the conical plug 55 from the inside, so that the outer wall of the conical plug 55 and the inner wall of the joint are closely fitted to seal the oil pipe 6; the air tightness detector injects air into the oil pipe 6 through the air pipe 54 and the air path 58 to perform an air tightness detection operation on the oil pipe 6;

[0071] Step 5: The cylinder 52 controls the connection seat 53 to reset, and the inner support tube 57 retracts from the tapered groove 56 under the elastic action of the spring 59, and the side wall of the tapered plug 55 is no longer tightly fitted with the joint, and finally the tapered plug 55 is separated from the joint, completing the entire airtightness detection operation;

[0072] Step 6: The material moving device 2 drives the base plate 31 to move toward its feeding end, and the slide rod 411 slides from the low-position clamping section 4121 into the high-position releasing section 4122 to move the connecting rod 422 upward, and the connecting plate 426 releases the oil pipe 6 and resets to avoid the oil pipe 6, so that the oil pipe 6 can be smoothly moved.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An engine oil pipe detection device capable of continuously detecting air tightness, comprising a frame (1), characterized in that: A material moving device (2) is provided on the top of the frame (1); A plurality of double-station profiling positioning jigs (3) are evenly arranged at equal intervals on the moving end of the material transfer device (2) and can place two oil pipes (6) at a time and position the oil pipes (6); The double-station profiling positioning jig (3) is provided with an automatic avoidance clamping mechanism (4) capable of automatically and synchronously clamping and releasing two oil pipes (6) on the double-station profiling positioning jig (3); The automatic avoidance clamping mechanism (4) comprises a control component (41) and an avoidance clamping component (42); two groups of avoidance clamping components (42) are arranged at the upper end of the double-station profiling positioning fixture (3) for fastening the oil pipe (6) to the double-station profiling positioning fixture (3); the control component (41) is arranged at the lower side of the double-station profiling positioning fixture (3) and connected to the lower ends of the two groups of avoidance clamping components (42); the control component (41) is used to control the avoidance clamping components (42) to clamp and release the oil pipe (6); A high-precision airtightness detection mechanism (5) for performing airtightness detection on the oil pipe (6) is arranged on the side of the frame (1).

2. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 1, characterized in that: The double-station profiling positioning fixture (3) comprises a base plate (31), a support block (32) and a profiling positioning structure. The base plate (31) is connected to the moving end of the material moving device (2) via a connecting piece, and the support block (32) is fixedly mounted on one end of the base plate (31). The upper ends of the base plate (31) and the support block (32) are provided with two groups of profiling positioning structures for positioning the oil pipe (6).

3. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 2, characterized in that: The profiling positioning structure comprises a profiling groove (33) and a positioning block (34). The profiling groove (33) for cooperating with the oil pipe (6) for positioning is provided at the upper ends of the base plate (31) and the support block (32). Positioning blocks (34) for limiting the joint of the oil pipe (6) are fixedly installed at both ends of the profiling groove (33).

4. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 3, characterized in that: The avoidance clamping assembly (42) comprises a cylinder seat (421), a connecting rod (422), a connecting block (423), a pressure plate (424), a pressure block (425), a connecting plate (426), a limiting pin (427) and a limiting groove (428). The cylinder seat (421) is fixedly mounted on the upper end of the base plate (31) and is located between the two profiling grooves (33). The inner side of the cylinder seat (421) is limitedly slidably connected with a connecting rod (422). The upper end of the connecting rod (422) is fixedly mounted with a connecting block (423). Both sides of the connecting block (423) are symmetrically fixedly mounted with pressure plates (424); a pressure block (425) for pressing the oil pipe (6) tightly into the profiling groove (33) is fixedly mounted on one end of the pressure plate (424) away from the connecting block (423); the lower ends of the connecting rods (422) of the two sets of avoidance clamping assemblies (42) are rotatably connected to the same connecting plate (426) via bearings.

5. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 4, characterized in that: The limiting pin (427) is fixedly connected to the connecting rod (422), and the side wall of the cylinder seat (421) is provided with a limiting groove (428) which is slidably connected to the limiting pin (427); the limiting groove (428) is composed of an upper oblique groove (4281) and a lower vertical groove (4282).

6. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 5, characterized in that: The control assembly (41) comprises a slide bar (411) and a slide groove (412), wherein the two slide bars (411) are symmetrically fixedly mounted on the left and right ends of the connecting plate (426), and a slide groove (412) is provided on the side of the frame (1) and is limitedly slidably connected to the slide bar (411); The slide groove (412) is composed of a low-position clamping section (4121), a high-position release section (4122) and a transition section (4123); the high-position release section (4122) is located on both sides of the high-precision airtightness detection mechanism (5); the low-position clamping section (4121) is located between the high-position release sections (4122); the low-position clamping section (4121) and the high-position release section (4122) are connected via the transition section (4123); the height of the low-position clamping section (4121) is lower than the height of the high-position release section (4122).

7. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 6, characterized in that: The high-precision airtightness detection mechanism (5) comprises a support (51), a cylinder (52), a connecting seat (53), an air pipe (54) and an inner support sealing assembly. The two supports (51) are arranged on the left and right sides of the frame (1). The upper end of the support (51) is fixedly mounted with the cylinder (52); the output end of the cylinder (52) is fixedly mounted with the connecting seat (53); one end of the connecting seat (53) facing the base plate (31) is provided with two sealing assemblies for respectively sealing the joints of the two oil pipes (6) on the base plate (31); and air pipes (54) for cooperating with the two sealing assemblies are also respectively fixedly mounted on the connecting seat (53).

8. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 7, characterized in that: The inner support sealing assembly comprises a conical plug (55), a conical groove (56), an inner support tube (57) and a spring (59); one end of the connecting seat (53) facing the base plate (31) is provided with two conical plugs (55) for respectively sealing the joints of the two oil pipes (6) on the base plate (31); a conical groove (56) is provided in the conical plug (55); one end of the inner support tube (57) is limitedly slidably connected to the conical groove (56), and the other end of the inner support tube (57) is fixedly connected to the connecting seat (53); the spring (59) is sleeved on the outer side of the inner support tube (57), and the two ends of the spring (59) are respectively fixedly connected to the connecting seat (53) and the conical plug (55).

9. The engine oil pipe detection device capable of continuously detecting air tightness according to claim 8, characterized in that: The head diameter of the conical plug (55) is smaller than the inner diameter of the joint of the air pipe (54), and the conical plug (55) is made of elastic rubber material; the interior of the inner support tube (57) and the conical groove (56) form an air passage (58) connected to the air pipe (54), and the air pipe (54) is connected to an airtightness detector.

10. A method for using an engine oil pipe detection device capable of continuously detecting air tightness, using the engine oil pipe detection device capable of continuously detecting air tightness according to claim 9, characterized in that: The following steps are involved: Step 1: placing the oil pipe (6) in the profiling groove (33) at the feeding end of the material transfer device (2), clamping the joints at both ends of the oil pipe (6) in the positioning clamping blocks (34), and judging whether the shape and size of the oil pipe (6) are qualified by the degree of matching between the oil pipe (6) and the profiling groove (33); Step 2: The material moving device (2) drives the base plate (31) to move, and the slide bar (411) slides in the slide groove (412). When the slide bar (411) slides from the high-position release section (4122) of the slide groove (412) to the low-position clamping section (4121), the slide bar (411) drives the two connecting rods (422) to move downward through the connecting plate (426), and the limiting pin (427) slides in the inclined groove (4281) and the vertical groove (4282) of the limiting groove (428) in turn, so that the connecting rod (422) drives the pressure block (425) to move downward and rotate to the top of the oil pipe (6), and then the connecting rod (422) drives the pressure block (425) to move vertically downward, pressing the oil pipes (6) on both sides tightly in the contoured groove (33) to fix the oil pipes (6); Step 3: The base plate (31) is moved to a set position, and the conical plug (55) is aligned with the joint of the oil pipe (6); Step 4: The cylinder (52) controls the connection seat (53) to move in the direction of the oil pipe (6), so that the head of the conical plug (55) is inserted into the joint. When the conical plug (55) is blocked, the connection seat (53) continues to move, so that the inner support tube (57) extends into the conical groove (56) to support the conical plug (55) from the inside, so that the outer wall of the conical plug (55) and the inner wall of the joint are closely fitted to seal the oil pipe (6); the air tightness detector injects air into the oil pipe (6) through the air pipe (54) and the air path (58) to perform an air tightness detection operation on the oil pipe (6); Step 5: The cylinder (52) controls the connection seat (53) to reset, and the inner support tube (57) retracts from the tapered groove (56) under the elastic action of the spring (59), and the side wall of the tapered plug (55) no longer fits tightly with the joint. Finally, the tapered plug (55) is separated from the joint, and the entire airtightness detection operation is completed; Step 6: The material moving device (2) drives the base plate (31) to move toward its feeding end, and the sliding rod (411) slides from the low-position clamping section (4121) into the high-position releasing section (4122) to move the connecting rod (422) upward, and the connecting plate (426) releases the oil pipe (6) and resets to avoid the oil pipe (6), so that the oil pipe (6) can be smoothly moved.

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