A continuous detection device and method for high-strength bolts used in train tracks

Abstract

The present invention discloses a continuous detection device and method for high-strength bolts used in train tracks, and the present invention relates to the technical field of high-strength bolt detection devices for train tracks. Compared with the prior art, since the loading work of the next bolt can be carried out during the detection process of one bolt, and when the detection of the previous bolt is completed, the rotating frame is driven to rotate, and then it can quickly enter the next detection work, which greatly shortens the time interval between two adjacent detection operations, thus greatly improving the detection efficiency. At the same time, there is no need for manual feeding operation, which saves the manual operation steps, saves manpower, and improves the automation degree of the whole device.

Description

Technical Field

[0001] The present invention relates to the technical field of high-strength bolt detection devices for train tracks, and particularly to a continuous detection device and method for high-strength bolts used in train tracks. Background Art

[0002] The connecting pairs used on train tracks are high-strength bolts. Compared with traditional bolts, high-strength bolts are made of high-strength steel or bolts that require a large pre-tightening force. Before the erection of train tracks, when high-strength bolts enter the site, various data need to be sampled and detected batch by batch. Among them, the anti-tensile ability is one of the detection items. A tensile testing machine is used for testing. Before the test, a flat washer needs to be inserted onto the bolt and a tensile ring needs to be screwed on. By using the tensile machine to pull the tensile ring and the flat washer, the anti-tensile ability of the bolt can be measured.

[0003] The above introduction is about the operation process of testing the anti-tensile ability of high-strength bolts in the prior art. However, the prior art solution has the following technical problems: poor continuity. After testing a bolt pair, it is necessary to manually remove the tested bolt pair from the fixture of the tensile testing machine, and then manually load the bolt pair to be tested before continuing the test. The time interval between the two test operations is relatively long, and the continuity is poor. It is impossible to quickly enter the detection work of the next bolt pair. Moreover, there are many manual operation steps and the degree of automation is low. Since the number of tests per time is large, especially many construction units will contract the detection work to a third party. The third party needs to carry out a large number of detection works every day. The poor continuity and low degree of automation of the existing high-strength bolt tensile testing machine ultimately lead to the problem of increasing the detection time. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a continuous detection device and method for high-strength bolts used in train tracks, which solves the problems of poor continuity and low degree of automation of the existing high-strength bolt tensile testing machine.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A high-strength bolt continuity detection device for train tracks, including a bottom plate, a rotating frame is rotatably installed on the top of the bottom plate, and several groups of bolt loading members are equiangularly installed on the outer wall of the rotating frame. The bolt loading member is composed of a left bearing sleeve fixed to the outer wall of the rotating frame and a right bearing sleeve arranged on the corresponding side of the left bearing sleeve and slidably connected to the outer wall of the rotating frame. On the top of the bottom plate, on the side far from the rotating frame, a hydraulic cylinder is fixed. The extending end of the hydraulic cylinder is equipped with a tensile force detection structure. The right bearing sleeve is detachably connected to the tensile force detection structure through a connection structure fixed on the tensile force detection structure. On the top of the bottom plate, a synchronous driving mechanism is also fixed. The input end of the synchronous driving mechanism is fixed on the extending end of the hydraulic cylinder, and the output end of the synchronous driving mechanism is fixed on the rotating frame. The synchronous driving mechanism is used to drive the rotation of the rotating frame to complete the feeding and discharging of bolts when the hydraulic cylinder extends again after the detection work is completed by the contraction of the hydraulic cylinder.

[0008] Preferably, the rotating frame is composed of two vertically arranged support plates symmetrically fixed on one side of the top of the bottom plate, a rotating shaft rotatably connected to the upper ends of the two support plates through bearings, and six T-shaped connecting plates fixed equiangularly on the outer wall of the rotating shaft. Each group of bolt loading members is respectively installed on the outer wall of each T-shaped connecting plate on the side far from the rotating shaft. The left bearing sleeve is fixed to the outer wall of the T-shaped connecting plate, and the right bearing sleeve is slidably connected to the outer wall of the T-shaped connecting plate through a linear slide rail.

[0009] Preferably, a friction pad is fixed on the outer wall of the right bearing sleeve, and the bottom of the friction pad is in contact with the outer wall of the T-shaped connecting plate.

[0010] Preferably, the tensile force detection structure includes a connecting sleeve, a dislocation groove, a push-pull column, a triangular plate, a telescopic rod, a tensile force detector, a reset rod and a spring. The extending end of the hydraulic cylinder is slidably sleeved with a connecting sleeve. Dislocation grooves penetrating the side wall of the connecting sleeve are symmetrically opened on the side wall of the connecting sleeve. Push-pull columns are symmetrically fixed to the extending end of the hydraulic cylinder, and the two push-pull columns are respectively inserted into the inner sides of the two dislocation grooves. A triangular plate is arranged on the side of the connecting sleeve far from the hydraulic cylinder. Three telescopic rods are equiangularly fixed between the triangular plate and the connecting sleeve. On the side of the connecting sleeve close to the triangular plate, a tensile force detector is also fixed. The detection moving end of the tensile force detector is fixed to the outer wall of the triangular plate. The connection structure is fixed on the triangular plate. Reset rods are symmetrically fixed on the outer wall of the connecting sleeve. The outer end of the reset rod far from the connecting sleeve is slidably connected to the outer wall of the fixed end of the hydraulic cylinder through a sliding hole. A spring is sleeved on the outer side of the end of the reset rod far from the connecting sleeve. One end of the spring is fixed to the outer wall of the reset rod, and the other end of the spring is fixed to the outer wall of the fixed end of the hydraulic cylinder.

[0011] Preferably, the connecting structure includes an arc-shaped clamping sleeve and an arc-shaped clamping bar. An arc-shaped clamping sleeve is fixed to the side of the triangular plate away from the telescopic rod, and an arc-shaped clamping bar is fixed to the side of the right bearing sleeve close to the triangular plate. The arc-shaped clamping bar is matched with the arc-shaped clamping sleeve.

[0012] Preferably, the synchronous driving mechanism includes a vertical rod, a lifting sleeve, a driving column, a driving plate, a driving groove, a rack plate, a six-slot wheel, a coaxial rod, a driving wheel, and a gear. A vertical rod is fixed to the top of the bottom plate on the side away from the rotating frame. A lifting sleeve is slidably sleeved on the outer side of the vertical rod. Driving columns are symmetrically fixed to the top of the lifting sleeve. Two driving plates are symmetrically fixed to the outer wall of the extending end of the hydraulic cylinder, and the driving plates are arranged vertically. A driving groove is formed in the driving plate, and the driving column is inserted into the inner side of the driving groove. A rack plate is fixed to the outer wall of the lifting sleeve. A six-slot wheel is fixed to the side of the rotating shaft close to the rack plate. A coaxial rod is rotatably connected to a support plate on the top of the bottom plate on the side close to the six-slot wheel through a bearing. A driving wheel is fixed to one end of the coaxial rod. The driving wheel is matched with the six-slot wheel. A gear is also rotatably installed at one end of the coaxial rod close to the rack plate through a one-way bearing. The gear is meshed with the rack plate.

[0013] Preferably, chamfers are provided at both ends of the arc-shaped clamping bar.

[0014] Preferably, a support frame is further provided on one side of the bottom plate. An inclined blanking guide plate is fixed to the top of the support frame. The upper end of the blanking guide plate is butted against the blanking position of the rotating frame.

[0015] The present invention also provides a method for continuously detecting high-strength bolts for train tracks. The above-mentioned device for continuously detecting high-strength bolts for train tracks is used for detection, including the following steps:

[0016] S1. Determine the sampling quantity. The sampling and re-inspection of high-strength bolts are carried out according to the production lot. The maximum inspection lot for high-strength bolts of the same batch is 3000 sets. After exceeding this quantity, inspection is carried out according to a new batch. The sampling quantity is 5% to 10% of the total quantity of each batch;

[0017] S2. Carry out fixture clamping. It is necessary to select a tension ring and flat washers that match the specifications of the high-strength bolts:

[0018] 1). First, pass the bolt through the flat washer and push the flat washer to the root of the bolt;

[0019] 2). Then screw on the tension ring to ensure that the end of the screw rod is flush with the end face of the tension ring.

[0020] 3), load the assembled high-strength bolt pair, which is an integral body including a bolt, a flat washer and a tension ring, into the bolt loading member. Place the flat washer inside the left bearing sleeve and the tension ring inside the right bearing sleeve;

[0021] S3. Tensile test: Operate the above-mentioned continuous detection device for high-strength bolts for train tracks to work, stretch the high-strength bolt pair, and measure whether the tensile capacity of the high-strength bolts of the same batch is within the required standard.

[0022] Preferably, bolts with the same performance grade, material, furnace number, thread specification, length, machining, heat treatment process, and surface treatment process are of the same batch. When the bolt length ≤ 100 mm, the length difference ≤ 15 mm; when the bolt length > 100 mm, the length difference ≤ 20 mm, which can be regarded as the same length; nuts with the same performance grade, material, furnace number, thread specification, machining, heat treatment process, and surface treatment process are of the same batch; washers with the same performance grade, material, furnace number, specification, machining, heat treatment process, and surface treatment process are of the same batch.

[0023] (III) Beneficial effects

[0024] The present invention provides a continuous detection device and method for high-strength bolts for train tracks. Compared with the prior art, it has the following beneficial effects:

[0025] (1) Through the cooperation of the rotating frame, hydraulic cylinder, connection structure, tensile force detection structure and synchronous drive mechanism, the manual participation steps in the test of the anti-tensile performance of high-strength bolts are reduced. Specifically, only manual loading of the bolt pair is required, and then the tensile force test can be automatically carried out. After the test is completed, through the extension of the hydraulic cylinder, the synchronous drive mechanism can automatically drive the rotating frame to flip. As the rotating frame flips, the bolt pair can be automatically unloaded, greatly reducing the manual participation steps in the operation process, improving the automation degree of the entire equipment, and saving manpower.

[0026] (2) During the specific detection process, when a tensile test is carried out on a connection pair, the operator can load the next bolt pair to be measured manually. There is no need to carry out the loading work after removing the bolt pair that has been measured at the end of the detection. After the detection of the previous bolt pair is completed, driving the rotating frame to rotate can carry out the unloading work of the bolt pair. At the same time of unloading, the bolt pair to be measured can rotate to the detection station, and then it can quickly enter the next detection work. Compared with the prior art, the time interval between two adjacent detection works is greatly shortened, thus improving the detection efficiency and being more conducive to the use of detection institutions.

[0027] (3) By utilizing a mechanical linkage structure, that is, a synchronous drive mechanism, the telescoping of the hydraulic cylinder and the rotation of the rotating frame are mechanically linked, eliminating the need for a separate power source device to control the rotation of the rotating frame, thereby ensuring the timeliness and stability of each rotation of the rotating frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the overall structure of the present invention;

[0029] Figure 2 Schematic diagram of the structure of the support plate position of the present invention (one);

[0030] Figure 3 Schematic diagram of the structure of the support plate position of the present invention (two);

[0031] Figure 4 Schematic diagram of the structure of the T-shaped connecting plate of the present invention;

[0032] Figure 5 Of the present invention Figure 4 Enlarged view at A of;

[0033] Figure 6 Schematic diagram of the structure of the hydraulic cylinder of the present invention;

[0034] Figure 7 Of the present invention Figure 6 Enlarged view at B of;

[0035] Figure 8 Schematic diagram of the shape structure of the connecting sleeve of the present invention;

[0036] Figure 9 Schematic diagram of the structure of the protruding part position of the present invention;

[0037] Figure 10 Schematic diagram of the structure of the synchronous drive mechanism of the present invention;

[0038] Figure 11 Of the present invention Figure 10 Enlarged view at C of;

[0039] Figure 12 Of the present invention Figure 10 Enlarged view at D of;

[0040] Figure 13 Schematic diagram of the structure of the drive column position of the present invention;

[0041] Figure 14 Flowchart of the method of the present invention.

[0042] In the figure, 1 is the bottom plate; 2 is the rotating frame; 21 is the support plate; 22 is the rotating shaft; 23 is the T-shaped connecting plate; 3 is the bolt loading member; 31 is the left bearing sleeve; 32 is the right bearing sleeve; 321 is the friction pad; 4 is the hydraulic cylinder; 5 is the tensile force detection structure; 51 is the connecting sleeve; 52 is the offset groove; 53 is the push-pull column; 54 is the triangular plate; 55 is the telescopic rod; 56 is the tensile force detector; 57 is the reset rod; 571 is the protruding part; 58 is the spring; 6 is the connecting structure; 61 is the arc-shaped clamping sleeve; 62 is the arc-shaped clamping bar; 7 is the synchronous driving mechanism; 71 is the vertical rod; 72 is the lifting sleeve; 73 is the driving column; 74 is the driving plate; 75 is the driving groove; 76 is the rack plate; 77 is the six-slot wheel; 78 is the coaxial rod; 79 is the driving wheel; 710 is the gear; 8 is the support frame; 9 is the blanking guide plate. Specific implementation mode

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

[0044] Embodiment 1

[0045] Please refer to Figure 1-13The embodiment of the present invention provides a technical solution: a high-strength bolt continuity detection device for train tracks, comprising a bottom plate 1, a rotating frame 2 is rotatably installed on the top of the bottom plate 1, the rotating frame 2 is composed of two vertically arranged support plates 21 symmetrically fixed on one side of the top of the bottom plate 1, a rotating shaft 22 rotatably connected to the upper ends of the two support plates 21 through a bearing, and a T-shaped connecting plate 23 fixed at an equal angle to the outer wall of the rotating shaft 22, six T-shaped connecting plates 23 are provided, and a bolt loading component 3 is installed on the outer wall of the T-shaped connecting plate 23 away from the rotating shaft 22, and the bolt loading component 3 The left bearing sleeve 31 is fixed to the outer wall of the T-shaped connecting plate 23, and the right bearing sleeve 32 is arranged on the corresponding side of the left bearing sleeve 31 and is slidably connected to the outer wall of the T-shaped connecting plate 23 through a linear slide rail. A friction pad 321 is fixed to the outer wall of the right bearing sleeve 32. The bottom of the friction pad 321 contacts the outer wall of the T-shaped connecting plate 23. The friction pad 321 can keep the right bearing sleeve 32 stable when and after the right bearing sleeve 32 is staggered from the extended end of the hydraulic cylinder 4, and will not slide left and right at will. It should be emphasized that when the bolt loading member 3 is in When the side is tilted, it is necessary to manually load the bolt pair into the inner side of the left bearing sleeve 31 and the right bearing sleeve 32. At this time, a certain force will be applied to the right bearing sleeve 32 during the process. Due to the setting of the friction pad 321, the friction between the friction pad 321 and the outer wall of the T-shaped connecting plate 23 is relatively large, and the position of the right bearing sleeve 32 will not be changed. A hydraulic cylinder 4 is fixed on the side of the top of the bottom plate 1 away from the rotating frame 2. The protruding end of the hydraulic cylinder 4 is installed with a tension detection structure 5. The right bearing sleeve 32 is connected to the tension detection structure 5 by a connecting structure 6 fixed on the tension detection structure 5. It is detachably connected to the tension detection structure 5, and a synchronous drive mechanism 7 is also fixed on the top of the base plate 1. The input end of the synchronous drive mechanism 7 is fixed on the protruding end of the hydraulic cylinder 4, and the output end of the synchronous drive mechanism 7 is fixed on the rotating frame 2. The synchronous drive mechanism 7 is used to drive the rotating frame 2 to rotate when the hydraulic cylinder 4 retracts to complete the detection work and extends again, so as to complete the loading and unloading of the bolts. A support frame 8 is also provided on one side of the base plate 1, and an inclined unloading guide plate 9 is fixed on the top of the support frame 8, and the upper end of the unloading guide plate 9 is docked with the unloading position of the rotating frame 2.

[0046] During use, a T-shaped connecting plate 23 is always located directly above, with its top surface in a horizontal state. When conducting the inspection of the first bolt pair, a flat washer is sleeved on the bolt and a tension ring is screwed on to form a bolt pair. The two ends of the bolt pair are respectively inserted into the left load-bearing sleeve 31 and the right load-bearing sleeve 32. The flat washer and the tension ring are respectively located inside the left load-bearing sleeve 31 and the right load-bearing sleeve 32, and their positions can be swapped, but they cannot be simultaneously inside one load-bearing sleeve. Then, the hydraulic cylinder 4 is driven to contract. At this time, a right load-bearing sleeve 32 directly above is connected to the tensile force detection structure 5 through the connecting structure 6. When the hydraulic cylinder 4 contracts, it can pull the tensile force detection structure 5, and then pull the uppermost right load-bearing sleeve 32, thereby stretching the bolt pair. As the stretching force continuously increases, the maximum tensile force that the bolt can withstand can be measured. During this inspection process, the staff can prepare the next bolt pair and insert it into the bolt-bearing member on a T-shaped connecting plate 23 that is inclined upward. After the inspection of the bolt pair being inspected is completed, the hydraulic cylinder 4 is driven to extend, and the uppermost right load-bearing sleeve 32 and the tensile force detection structure 5 return to their original positions. Subsequently, the hydraulic cylinder 4 can extend a certain distance while the uppermost right load-bearing sleeve 32 no longer moves. During this extension stage, the rotating frame 2 can be flipped through the synchronous drive mechanism 7, so that the bolt pair whose measurement has ended leaves the inspection work, and the rotating frame loaded with the bolt pair to be measured rotates to the inspection station directly above. In this way, the high-strength bolt tensile strength test work is continuously carried out reciprocally and continuously. As the rotating frame 2 continues to rotate, the bolt pair whose measurement has ended rotates towards the side close to the blanking guide plate 9. When the bolt pair rotates downward, it will slide out from the bolt-bearing member under the action of gravity and then fall onto the blanking guide plate 9 for blanking, realizing automatic blanking work. When this application is in use, compared with the prior art, since the loading work of the next bolt can be carried out during the inspection process of one bolt, when the inspection of the previous bolt is completed and the rotating frame 2 is driven to rotate, it can quickly enter the next inspection work, greatly shortening the time interval between two adjacent inspection works, thus greatly improving the inspection efficiency. At the same time, there is no need for manual blanking operation, saving manual operation steps, saving manpower, and improving the automation degree of the entire equipment.

[0047] The tensile force detection structure 5 includes a connecting sleeve 51, a dislocation groove 52, a push-pull column 53, a triangular plate 54, a telescopic rod 55, a tensile force detector 56, a reset rod 57 and a spring 58. The extending end of the hydraulic cylinder 4 is slidably sleeved with the connecting sleeve 51. The side wall of the connecting sleeve 51 is symmetrically provided with dislocation grooves 52 penetrating through the side wall of the connecting sleeve 51. The extending end of the hydraulic cylinder 4 is symmetrically fixed with push-pull columns 53. The two push-pull columns 53 are respectively inserted into the inner sides of the two dislocation grooves 52. A triangular plate 54 is arranged on the side of the connecting sleeve 51 away from the hydraulic cylinder 4. Three telescopic rods 55 are fixedly arranged at equal angles between the triangular plate 54 and the connecting sleeve 51. A tensile force detector 56 is also fixed on the side of the connecting sleeve 51 close to the triangular plate 54. The detection moving end of the tensile force detector 56 is fixed to the outer wall of the triangular plate 54. The connecting structure 6 is fixed on the triangular plate 54. The outer wall of the connecting sleeve 51 is symmetrically fixed with reset rods 57. The ends of the reset rods 57 away from the connecting sleeve 51 are slidably connected with the outer wall of the fixed end of the hydraulic cylinder 4 through sliding holes. A spring 58 is sleeved on the outer side of the end of the reset rod 57 away from the connecting sleeve 51. One end of the spring 58 is fixed to the outer wall of the reset rod 57, and the other end of the spring 58 is fixed to the outer wall of the fixed end of the hydraulic cylinder 4. The end of the reset rod 57 away from the connecting sleeve 51 forms a protruding part 571, which can limit the positions of the reset rod 57 and the connecting sleeve 51. Under the action of the elastic force, the protruding part 571 maintains a state of being pressed against the outer wall of the fixed end of the hydraulic cylinder 4.

[0048] It should be emphasized that when the bolt pair is at the uppermost end and the detection work is carried out, the hydraulic cylinder 4 contracts. In the initial stage of contraction, the right bearing sleeve 32 and the connecting sleeve 51 remain stationary until after contracting a certain distance. When one end of the push-pull column 53 in the dislocation groove 52 moves to the other end and abuts against the other end of the dislocation groove 52, then when the hydraulic cylinder 4 contracts again, it can pull the connecting sleeve 51 to move together, drive the tensile force detector 56, and pull the triangular plate 54 to move. Through the three telescopic rods 55, it can be ensured that the triangular plate 54 can always move vertically with respect to the connecting sleeve 51, thereby pulling the right bearing sleeve 32 at the uppermost end to slide. After that, when the hydraulic cylinder 4 contracts a certain distance, it can tighten the bolt pair. As the tensile force gradually increases, the anti-tensile performance of the bolt pair can be measured to see if it is within the requirements. During the detection process, the tensile force is measured by the tensile force detector 56. When the hydraulic cylinder 4 contracts and drives the connecting sleeve 51 to move together, the reset rod 57 moves together, and at this time, the compression spring 58 is compressed. After the measurement is completed, the hydraulic cylinder 4 extends. Under the action of the resilience of the spring 58, the reset rod 57 is pushed back to its original position, thereby being able to push the right bearing sleeve 32 at the uppermost end back to its original position. When it is reset, the protruding part 571 at the end of the reset rod 57 presses against the outer wall of the fixed end of the hydraulic cylinder 4 again. Then the hydraulic cylinder 4 can continue to extend a certain distance. During this continued extension process, the right bearing sleeve 32 at the uppermost end, the connecting sleeve 51, the triangular plate 54, the telescopic rods 55, the tensile force detector 56, and the reset rod 57 all stop moving. As the hydraulic cylinder 4 continues to extend, the push-pull rod moves from the side close to the hydraulic cylinder 4 inside the dislocation groove 52 to the end of the dislocation groove 52 close to the right bearing sleeve 32 until it reaches the end of the dislocation groove 52, and the detection work ends.

[0049] The synchronous drive mechanism 7 includes a vertical rod 71, a lifting sleeve 72, a drive column 73, a drive plate 74, a drive groove 75, a rack plate 76, a six-slot wheel 77, a coaxial rod 78, a drive wheel 79, and a gear 710. A vertical rod 71 is fixed to the top of the bottom plate 1 on the side away from the rotating frame 2. A lifting sleeve 72 is slidably sleeved on the outer side of the vertical rod 71. Drive columns 73 are symmetrically fixed to the top of the lifting sleeve 72. Two drive plates 74 are symmetrically fixed to the outer wall of the extending end of the hydraulic cylinder 4, and the drive plates 74 are arranged vertically. Drive grooves 75 are formed in the drive plates 74, and the drive columns 73 are inserted into the inner sides of the drive grooves 75. A rack plate 76 is fixed to the outer wall of the lifting sleeve 72. A six-slot wheel 77 is fixed to one side of the rotating shaft 22 close to the rack plate 76. A coaxial rod 78 is rotatably connected to a support plate 21 on the top of the bottom plate 1 on the side close to the six-slot wheel 77 through a bearing. A drive wheel 79 is fixed to one end of the coaxial rod 78, and the drive wheel 79 is matched with the six-slot wheel 77. A gear 710 is also rotatably installed at one end of the coaxial rod 78 close to the rack plate 76 through a one-way bearing, and the gear 710 is meshed with the rack plate 76. The connecting structure 6 includes an arc-shaped clamping sleeve 61 and an arc-shaped clamping strip 62. An arc-shaped clamping sleeve 61 is fixed to the side of the triangular plate 54 away from the telescopic rod 55. An arc-shaped clamping strip 62 is fixed to the side of the right bearing sleeve 32 close to the triangular plate 54. The arc-shaped clamping strip 62 is matched with the arc-shaped clamping sleeve 61. Chamfers are formed at both ends of the arc-shaped clamping strip 62. When the rotating frame 2 rotates, the chamfers can make it easier for the arc-shaped clamping strip 62 to smoothly insert into the inner side of the arc-shaped clamping sleeve 61;

[0050] When the hydraulic cylinder 4 is retracted for testing, in the early stage of retraction, the driving groove 75 can make the driving column 73 drive the lifting sleeve 72 and the rack plate 76 to move upward, and at this time, the toggle gear 710 rotates. Under the action of the one-way bearing, the rotation of the gear 710 cannot drive the coaxial rod 78 to rotate. After the hydraulic cylinder 4 shrinks and moves a certain distance, when the push-pull column 53 reaches the end of the offset groove 52 close to one end of the hydraulic cylinder 4, the rack reaches the uppermost position, and then the hydraulic cylinder 4 continues to shrink. Thereafter, the rack no longer slides upward, and then the detection work is carried out. After the detection is completed, the hydraulic cylinder 4 is extended, and the upper right-hand bearing sleeve 32 and the connecting sleeve 51 are pushed to reset. Thereafter, the push-pull column 53 will continue to move inside the offset groove 52, and thereafter the hydraulic cylinder 4 continues to extend, and again under the action of the driving groove 75 of the driving plate 74, the driving The movable column 73 lifting sleeve 72 and rack plate 76 slide downward, driving the gear 710 to rotate. At this time, under the action of the single-line bearing, the gear 710 can drive the coaxial rod 78 to rotate until the hydraulic cylinder 4 is fully extended and the rack reaches the lowermost position and resets. During the whole process, the gear 710 can be driven to rotate a full circle, thereby driving the driving wheel 79 to rotate, and then the six-point groove wheel 77 rotates 60 degrees, thereby causing the rotating frame 2 to rotate 60 degrees, so that the bolt pair whose measurement is completed leaves the detection station, and its corresponding arc-shaped card strip 62 is separated from the arc-shaped card sleeve 61, and the loaded bolt pair to be measured is rotated to the detection station, and its corresponding arc-shaped card strip 62 is rotated and inserted into the inner side of the arc-shaped card sleeve 61, completing the connection work of its corresponding right-side bearing sleeve 32 and the triangular plate 54, and the detection work is carried out continuously in this reciprocating manner.

[0051] Embodiment 2

[0052] See also Figure 14 The present invention also provides a method for detecting the continuity of high-strength bolts for train tracks, which uses the high-strength bolt continuity detection device for train tracks of the first embodiment to perform detection, and comprises the following steps:

[0053] S1. Determine the number of random inspections. The sampling and re-inspection of high-strength bolts shall be carried out according to the factory batch. The maximum inspection batch of the same batch of high-strength bolts is 3,000 sets. If the number exceeds this, it shall be inspected according to the new batch. The number of random inspections shall be 5% to 10% of the total amount of each batch;

[0054] S2. For fixture clamping, it is necessary to select tension rings and flat washers that match the specifications of high-strength bolts:

[0055] 1) First, insert the bolt into the flat washer and push the flat washer into the root of the bolt;

[0056] 2) Then screw on the tension ring to ensure that the end of the screw is flush with the end face of the tension ring.

[0057] 3), Load the assembled high-strength bolt pair, which is an integral body including a bolt, a flat washer and a tension ring, into the bolt loading member 3. Place the flat washer inside the left bearing sleeve 31 and the tension ring inside the right bearing sleeve 32.

[0058] S3. Tensile test: Operate the above-mentioned continuous detection device for high-strength bolts for train tracks to stretch the high-strength bolt pair and measure whether the tensile capacity of high-strength bolts of the same batch is within the required standard.

[0059] Bolts with the same performance grade, material, furnace number, thread specification, length, machining, heat treatment process, and surface treatment process are of the same batch. When the bolt length ≤ 100 mm, the length difference ≤ 15 mm; when the bolt length > 100 mm, the length difference ≤ 20 mm, and they can be regarded as the same length. Nuts with the same performance grade, material, furnace number, thread specification, machining, heat treatment process, and surface treatment process are of the same batch. Washers with the same performance grade, material, furnace number, specification, machining, heat treatment process, and surface treatment process are of the same batch.

[0060] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0061] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0062] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength bolt continuous detection device for train tracks, characterized in that, It includes a bottom plate (1). A rotating frame (2) is rotatably mounted on the top of the bottom plate (1). A number of groups of bolt loading members (3) are equiangularly mounted on the outer wall of the rotating frame (2). The bolt loading member (3) is composed of a left bearing sleeve (31) fixed to the outer wall of the rotating frame (2) and a right bearing sleeve (32) arranged on the corresponding side of the left bearing sleeve (31) and slidably connected to the outer wall of the rotating frame (2). A hydraulic cylinder (4) is fixed on the top of the bottom plate (1) on the side far from the rotating frame (2). A tensile force detection structure (5) is mounted on the extending end of the hydraulic cylinder (4). The right bearing sleeve (32) is detachably connected to the tensile force detection structure (5) through a connection structure (6) fixed on the tensile force detection structure (5). A synchronous driving mechanism (7) is also fixed on the top of the bottom plate (1). The input end of the synchronous driving mechanism (7) is fixed on the extending end of the hydraulic cylinder (4), and the output end of the synchronous driving mechanism (7) is fixed on the rotating frame (2). The synchronous driving mechanism (7) is used to drive the rotating frame (2) to rotate to complete the feeding and discharging of bolts when the hydraulic cylinder (4) extends again after the detection work is completed when it contracts.

2. The continuous detection device for high-strength bolts used in train tracks according to claim 1, characterized in that: The rotating frame (2) is composed of two vertically arranged support plates (21) symmetrically fixed on one side of the top of the bottom plate (1), a rotating shaft (22) rotatably connected to the upper ends of the two support plates (21) through bearings, and T-shaped connecting plates (23) equiangularly fixed on the outer wall of the rotating shaft (22). There are six T-shaped connecting plates (23). Each group of bolt loading members (3) is respectively mounted on the outer wall of each T-shaped connecting plate (23) on the side far from the rotating shaft (22). The left bearing sleeve (31) is fixed to the outer wall of the T-shaped connecting plate (23), and the right bearing sleeve (32) is slidably connected to the outer wall of the T-shaped connecting plate (23) through a linear slide rail.

3. The continuous detection device for high-strength bolts used in train tracks according to claim 2, characterized in that: A friction pad (321) is fixed on the outer wall of the right bearing sleeve (32), and the bottom of the friction pad (321) is in contact with the outer wall of the T-shaped connecting plate (23).

4. The continuous detection device for high-strength bolts used in train tracks according to claim 3, wherein: The tensile force detection structure (5) includes a connecting sleeve (51), a dislocation groove (52), a push-pull column (53), a triangular plate (54), a telescopic rod (55), a tensile force detector (56), a reset rod (57) and a spring (58). The extending end of the hydraulic cylinder (4) is slidably sleeved with the connecting sleeve (51). The side wall of the connecting sleeve (51) is symmetrically provided with dislocation grooves (52) penetrating through the side wall of the connecting sleeve (51). The extending end of the hydraulic cylinder (4) is symmetrically fixed with push-pull columns (53), and the two push-pull columns (53) are respectively inserted into the inner sides of the two dislocation grooves (52). A triangular plate (54) is arranged on the side of the connecting sleeve (51) away from the hydraulic cylinder (4). Three telescopic rods (55) are fixedly arranged at equal angles between the triangular plate (54) and the connecting sleeve (51). A tensile force detector (56) is also fixed on the side of the connecting sleeve (51) close to the triangular plate (54). The detection moving end of the tensile force detector (56) is fixed to the outer wall of the triangular plate (54). The connecting structure (6) is fixed on the triangular plate (54). The outer wall of the connecting sleeve (51) is symmetrically fixed with reset rods (57). The ends of the reset rods (57) away from the connecting sleeve (51) are slidably connected with the outer wall of the fixed end of the hydraulic cylinder (4) through sliding holes. A spring (58) is sleeved on the outer side of the end of the reset rod (57) away from the connecting sleeve (51). One end of the spring (58) is fixed to the outer wall of the reset rod (57), and the other end of the spring (58) is fixed to the outer wall of the fixed end of the hydraulic cylinder (4).

5. The continuous detection device for high-strength bolts used in train tracks according to claim 4, wherein: The connecting structure (6) includes an arc-shaped clamping sleeve (61) and an arc-shaped clamping strip (62). The arc-shaped clamping sleeve (61) is fixed on the side of the triangular plate (54) away from the telescopic rod (55). The arc-shaped clamping strip (62) is fixed on the side of the right bearing sleeve (32) close to the triangular plate (54). The arc-shaped clamping strip (62) is matched with the arc-shaped clamping sleeve (61).

6. The continuous detection device for high-strength bolts used in train tracks according to claim 5, wherein: The synchronous drive mechanism (7) includes a vertical rod (71), a lifting sleeve (72), a drive column (73), a drive plate (74), a drive groove (75), a rack plate (76), a six-slot wheel (77), a coaxial rod (78), a drive wheel (79) and a gear (710). On the top of the bottom plate (1) and on the side far from the rotating frame (2), a vertical rod (71) is fixed. A lifting sleeve (72) is slidably sleeved on the outer side of the vertical rod (71). On the top of the lifting sleeve (72), drive columns (73) are symmetrically fixed. On the outer wall of the extending end of the hydraulic cylinder (4), two drive plates (74) are symmetrically fixed, and the drive plates (74) are arranged vertically. A drive groove (75) is formed in the drive plate (74). The drive column (73) is inserted into the inside of the drive groove (75). A rack plate (76) is fixed on the outer wall of the lifting sleeve (72). On one side of the rotating shaft (22) close to the rack plate (76), a six-slot wheel (77) is fixed. On a support plate (21) on the top of the bottom plate (1) and on the side close to the six-slot wheel (77), a coaxial rod (78) is rotatably connected through a bearing. One end of the coaxial rod (78) is fixed with a drive wheel (79), and the drive wheel (79) is matched with the six-slot wheel (77). One end of the coaxial rod (78) close to the rack plate (76) is also rotatably installed with a gear (710) through a one-way bearing, and the gear (710) is meshed with the rack plate (76).

7. The continuous detection device for high-strength bolts used in train tracks according to claim 5, characterized in that: Both ends of the arc-shaped clamping strip (62) are provided with chamfers.

8. The continuous detection device for high-strength bolts used in train tracks according to claim 1, wherein: On one side of the bottom plate (1), a support frame (8) is further provided. On the top of the support frame (8), an inclined blanking guide plate (9) is fixed. The upper end of the blanking guide plate (9) is butted against the blanking position of the rotating frame (2).

9. A continuous detection method for high-strength bolts used in train tracks, characterized in that, Using the high-strength bolt continuous detection device for train tracks described in any one of claims 1-8 for detection, includes the following steps: S1. Determine the sampling quantity. The sampling re-inspection of high-strength bolts is carried out according to the production batch. The maximum inspection batch of high-strength bolts in the same batch is 3000 sets. After exceeding this quantity, the inspection is carried out according to a new batch. The sampling quantity is 5% to 10% of the total quantity of each batch; S2. Carry out fixture clamping. It is necessary to select a tension ring and a flat washer that match the specification of the high-strength bolt: 1). First, pass the bolt through the flat washer and push the flat washer to the root of the bolt; 2). Then screw on the tension ring to ensure that the end of the screw rod is flush with the end face of the tension ring; 3). Put the assembled high-strength bolt pair (the bolt pair is an integral body including the bolt, the flat washer and the tension ring) into the bolt loading member (3), place the flat washer inside the left bearing sleeve (31), and place the tension ring inside the right bearing sleeve (32); S3. Tensile test. Operate the high-strength bolt continuous detection device for train tracks described in any one of claims 1-8 to work, stretch the high-strength bolt pair, and measure whether the tensile capacity of the high-strength bolts in the same batch is within the required standard.

10. The continuous detection method for high-strength bolts used in train tracks according to claim 9, characterized in that: Bolts with the same performance grade, material, heat number, thread specification, length, machining, heat treatment process, and surface treatment process are considered as the same batch. When the bolt length ≤ 100 mm, the length difference ≤ 15 mm; when the bolt length > 100 mm, the length difference ≤ 20 mm, and they can be regarded as the same length. Nuts with the same performance grade, material, heat number, thread specification, machining, heat treatment process, and surface treatment process are considered as the same batch. Washers with the same performance grade, material, heat number, specification, machining, heat treatment process, and surface treatment process are considered as the same batch.

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