An impact test device for testing the mechanical properties of oil drill pipes

Abstract

The present invention discloses an impact test device for testing the mechanical properties of oil drill pipes, which relates to the technical field of drill pipe impact testing. The device comprises: a housing, the housing being rotatably connected to a pendulum, the housing being fixedly connected to a mounting seat, the mounting seat being fixedly connected to a fixed support seat and slidably connected to a dynamic support seat, the upper side of the dynamic support seat being fixedly connected to a dynamic support block, the upper side of the fixed support seat being fixedly connected to a fixed support block; a mounting frame being fixedly connected to a side of the housing close to the fixed support block, the mounting frame being installed with a conveyor belt, the conveyor belt being fixedly connected to a plurality of push blocks; a material storage rack being fixedly connected to the mounting frame and being located above the conveyor belt; a position limiting member being fixedly connected to the fixed support block; and a detection assembly being arranged on the mounting seat. The present invention utilizes a conveyor belt to place samples, which on the one hand improves the loading efficiency, and on the other hand facilitates each sample to be kept in the same position, thereby improving the detection efficiency of the samples.

Description

Technical Field

[0001] The invention relates to the technical field of drill pipe impact testing, in particular to an impact testing device for testing the mechanical properties of a petroleum drill pipe. Background Art

[0002] Oil drill pipe is typically welded together from a pipe body and joints. To ensure drill pipe quality, it is typically subjected to various tests after production, including tensile testing, hardness testing, and impact testing, to verify that its mechanical properties meet standards. This includes the Charpy V-notch impact test, which measures the impact resistance of the drill pipe weld. During the impact test, multiple longitudinal specimens are first taken from the drill pipe weld. A standard V-notch is then created on the specimen surface. The specimen is then placed on the clamping table of an impact testing machine (consisting of a base plate and two vertical plates with stepped stoppers). The specimen is positioned vertically and horizontally against the stepped stoppers. The impact testing machine is then activated, and a pendulum swings freely at a fixed height to impact the specimen, causing it to break at the V-notch. The difference in gravitational potential energy between the initial position of the pendulum and the highest point of its swing after impact is the sample's impact energy. A greater impact energy energy indicates a stronger impact resistance.

[0003] When conducting large-scale impact tests on oil drill pipes, frequent manual replacement and placement of samples is required. During the sample placement process, tools are first needed to ensure that the V-shaped notch of the sample is located between the two limit blocks. Then, both the horizontal and vertical surfaces of the sample are aligned with the two limit blocks. This completes the sample placement. This method involves many steps and has low detection efficiency. Summary of the Invention

[0004] The invention provides an impact test device for testing the mechanical properties of oil drill pipes, so as to overcome the disadvantages of the prior art that the operation of placing samples is complicated and the detection efficiency is low when performing large-scale impact tests.

[0005] The technical solution of the present invention is: an impact test device for testing the mechanical properties of oil drill pipes, comprising:

[0006] A housing, wherein the housing is rotatably connected to a pendulum, the housing is fixedly connected to a mounting seat, the mounting seat is fixedly connected to a fixed support seat and slidably connected to a dynamic support seat, the upper side of the dynamic support seat is fixedly connected to a dynamic support block, and the upper side of the fixed support seat is fixedly connected to a fixed support block;

[0007] A mounting frame is fixedly connected to a side of the housing close to the fixed support block, the mounting frame is equipped with a conveyor belt, and a plurality of push blocks are fixedly connected to the conveyor belt;

[0008] A material storage rack, fixed to the mounting frame and located above the conveyor belt;

[0009] a limiting member, fixedly connected to the fixed support block;

[0010] The detection component is arranged on the mounting seat and is used to detect and adjust the position of the sample.

[0011] Furthermore, the height of the conveyor belt gradually decreases in the direction from the dynamic support seat to the fixed support seat.

[0012] Furthermore, a limit bar is fixedly connected to the storage rack, and the limit bar is used to limit the samples in the storage rack.

[0013] Furthermore, the detection component includes:

[0014] An electric push rod is mounted on the mounting seat, a U-shaped frame is fixedly connected to the telescopic end of the electric push rod, two mounting shells are fixedly connected to the side of the U-shaped frame away from the mounting seat, a detection head is limitedly and slidably connected in the mounting shell, a sensor is installed in the mounting shell, and a first spring is fixedly connected between the sensor and the adjacent detection head;

[0015] Two centering assemblies, respectively provided on adjacent mounting shells, for centering the specimen relative to the movable support block and the fixed support block;

[0016] An adjustment component is arranged on the mounting seat and is used for adjusting the position of the dynamic support seat.

[0017] Furthermore, the centering component includes:

[0018] The spring telescopic rod is connected to the mounting shell in a limited sliding manner. A second spring is fixedly connected between the spring telescopic rod and the adjacent mounting shell. A pull rope is commonly fixedly connected between the spring telescopic rod and the adjacent detection head.

[0019] Furthermore, the adjustment component includes:

[0020] A connecting rod is rotatably connected to the dynamic support seat and is threadedly connected to the mounting seat, and a transmission arc block is fixed to the connecting rod;

[0021] The power piece is fixedly connected to the dynamic support seat. The output shaft of the power piece is fixedly connected to a transmission disc. An extrusion part is provided in the transmission disc. The extrusion part is used to squeeze the transmission arc block.

[0022] Furthermore, it also includes:

[0023] Multiple elastic members are all arranged on the dynamic support seat, the elastic members are fixedly connected to the limiting columns, the dynamic support seat and the mounting seat are in contact with the limiting columns and there is friction, a plurality of limiting grooves are provided on the dynamic support seat, and the number of the limiting grooves is equal to the number of the elastic members, and the multiple elastic members are respectively fixed in adjacent limiting grooves.

[0024] Furthermore, it also includes:

[0025] The branch rod is slidingly connected to the dynamic support seat and is located at the same height as the limiting groove. The branch rod is slidingly connected to a transmission member. A third spring is fixed between the transmission member and the dynamic support seat. The transmission member is fixed with an extrusion member sealingly and slidingly connected to the branch rod. The position of the branch rod close to the adjacent limiting groove is sealed and limitedly slidably connected to the limiting rod. The limiting rod is used to squeeze the adjacent limiting column.

[0026] Furthermore, the transmission disc is slidably connected to an extrusion block on one side close to the dynamic support seat, and there is friction between the extrusion block and the transmission disc. An inclined surface is provided on the extrusion block, and the inclined surface of the extrusion block is used to squeeze the transmission member. The friction between the extrusion block and the transmission disc is greater than the elastic force of the third spring between the transmission member and the dynamic support seat.

[0027] Furthermore, there is friction between the branch rod and the dynamic support seat.

[0028] The advantages and positive effects of the present invention compared with the prior art are: the present invention uses a conveyor belt to place the sample, which on the one hand improves the loading efficiency, and on the other hand makes it convenient for each sample to remain in the same position, thereby improving the detection efficiency of the sample; the detection head pushes the sample to contact the vertical support surfaces on the fixed support block and the dynamic support block, on the one hand straightens the sample, and on the other hand judges whether the sample is deflected and the degree of deflection based on the elastic force comparison of the two first springs, and adjusts the position of the dynamic support seat based on this, thereby ensuring the accuracy of the position of the sample during the detection process, thereby improving the accuracy of the detection result; the elastic part is used to push the limit column to abut between the dynamic support seat and the mounting seat, and the relative position of the dynamic support seat and the mounting seat is locked by relying on the limit column, sharing the force dispersed on the dynamic support seat when the sample is impacted, reducing the force at the threaded connection between the connecting rod and the mounting seat, and maintaining the accuracy of the threaded transmission between the connecting rod and the mounting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting base, the fixed support base and the dynamic support base of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting frame, conveyor belt and storage rack of the present invention;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the dynamic support seat, dynamic support block and storage rack of the present invention;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of the push block, storage rack and limiter of the present invention;

[0034] Figure 6 Schematic diagram of the three-dimensional structure of the electric push rod, U-shaped frame and mounting shell of the present invention;

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the mounting seat, dynamic support seat and connecting rod of the present invention;

[0036] Figure 8 This is an exploded view of the dynamic support seat, connecting rod and power member of the present invention;

[0037] Figure 9 It is a schematic diagram of the three-dimensional structure of the elastic member, the limiting column and the limiting groove of the present invention;

[0038] Figure 10 Schematic diagram of the three-dimensional structure of the limiting groove, branch rod and transmission member of the present invention;

[0039] Figure 11 It is a schematic diagram of the three-dimensional structure of the transmission member, the extrusion member and the limiting rod of the present invention;

[0040] Figure 12 It is a schematic diagram of the three-dimensional structure of the transmission plate, transmission member and extrusion block of the present invention.

[0041] In the accompanying drawings: 1-housing, 2-pendulum, 3-mounting seat, 4-fixed support seat, 5-dynamic support seat, 6-dynamic support block, 7-fixed support block, 8-mounting frame, 9-conveyor belt, 10-pushing block, 11-storage rack, 111-limiting bar, 12-limiting member, 13-electric push rod, 14-U-shaped frame, 15-mounting shell, 16-detection head, 17-sensor, 18-spring telescopic rod, 19-pull rope, 20-connecting rod, 21-transmission arc block, 22-transmission disk, 221-extrusion part, 23-power member, 24-elastic member, 25-limiting column, 26-limiting groove, 27-branch rod, 28-transmission member, 29-extrusion member, 30-limiting rod, 31-extrusion block. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0043] An impact test device for testing the mechanical properties of oil drill pipes, see Figure 1-Figure 5 , including: a shell 1, the shell 1 is rotatably connected to the pendulum 2, the shell 1 is fixedly connected to a mounting seat 3, the mounting seat 3 is fixedly connected to a fixed support seat 4 and slidably connected to a dynamic support seat 5, the upper side of the dynamic support seat 5 is fixedly connected to a dynamic support block 6, and the upper side of the fixed support seat 4 is fixedly connected to a fixed support block 7; a mounting frame 8 is fixed to the side of the shell 1 close to the fixed support block 7, the mounting frame 8 is installed with a conveyor belt 9, and a plurality of pushing blocks 10 are fixed on the conveyor belt 9; a storage rack 11, fixed to the mounting frame 8, and located above the conveyor belt 9; a limit member 12, fixed to the fixed support block 7; a detection component, arranged on the mounting seat 3, for detecting and adjusting the position of the sample; in the direction of the automatic support seat 5 to the fixed support seat 4, the height of the conveyor belt 9 gradually decreases; a limit bar 111 is fixed in the storage rack 11, and the limit bar 111 is used to limit the sample in the storage rack 11.

[0044] The above scheme aims to solve the existing problem that when impact testing a large number of oil drill pipes is carried out, the samples need to be frequently replaced and placed, and there are many operating steps, which is not conducive to improving the efficiency of the impact test. This scheme uses a conveyor belt 9 to place the samples, which on the one hand improves the loading efficiency, and on the other hand makes it convenient for each sample to be kept in the same position, thereby improving the detection efficiency of the samples. A display screen is provided on the shell 1 for displaying the impact absorption energy absorbed by the sample when it is impacted by the pendulum 2. The number of pushing blocks 10 is determined according to the length of the conveyor belt 9 and the length of the sample. The distance between two adjacent pushing blocks 10 is greater than the length of the sample, which is used to stably drive the sample to move. The fixed support block 7 and the movable support block 6 are both provided with a horizontal support surface and a vertical support surface, the horizontal support surface is used to support the lower side of the sample, and the vertical support surface is used to support the left side of the sample. The vertical distance between the positioning piece 12 and the conveyor belt 9 is equal to the height of the sample, so that the inclined conveyor belt 9 can be used to build the sample onto the dynamic support block 6, and the limiting piece 12 is used to keep the sample in an inclined state before losing contact with the conveyor belt 9; the extension line of the center line of the upper side of the conveyor belt 9 passes through the front side of the horizontal support surface of the fixed support block 7, so that the conveyor belt 9 can push the sample to the horizontal support surface of the fixed support block 7 through the pushing block 10; there is friction between the sample and the lower side of the storage rack 11, which is less than the gravity of the sample, and the friction is greater than the friction when the sample contacts the conveyor belt 9, that is, the conveyor belt 9 can only drive the sample to move through the pushing block 10; the limiting strip 111 is used to limit the direction of the V-shaped notch of the sample to prevent the sample position from deviating during the manual placement of the sample in the storage rack 11, thereby ensuring the accuracy of the impact test results.

[0045] The working principle of the feeding part in this scheme is as follows: when conducting an impact test on oil drill pipes, a number of drill pipes are randomly selected from the batch of oil drill pipes for testing, and three longitudinal specimens are taken from the welding part of a single oil drill pipe to be tested. Subsequently, a standard V-shaped notch is opened in the middle of the specimen, and the specimens with the notch are placed in the storage rack 11 in sequence with the notch facing the left. At this time, the specimen at the bottom of the storage rack 11 is in contact with the surface of the conveyor belt 9. The conveyor belt 9 is started and drives the push block 10 to rotate clockwise (the rotation perspective of this article is from right to left). The push block 10 pushes the specimen at the bottom of the storage rack 11 to move backward, and the specimen gradually moves out of the storage rack 11. The specimens in the storage rack 11 are placed in contact with the surface of the conveyor belt 9. The remaining samples move down by the height of one sample under the action of gravity, so that the new sample contacts the conveyor belt 9 again. During the movement, the sample gradually contacts the limiter 12. At the same time, the rear end of the sample gradually "protrudes" from the conveyor belt 9 and is placed on the horizontal support surface of the fixed support block 7. As the sample moves, the contact area between the sample and the conveyor belt 9 gradually decreases until the center of gravity of the sample moves out of the conveyor belt 9. At this time, the sample is kept in an inclined state by relying on the limiter 12. As the sample moves, the sample loses contact with the limiter 12. At this time, the sample swings under the action of gravity, causing the rear end of the sample to swing to the horizontal support surface of the dynamic support block 6, thereby completing the loading operation of a single sample.

[0046] See also Figure 3 and Figure 6 , Detection component: an electric push rod 13, installed on the mounting base 3, the telescopic end of the electric push rod 13 is fixedly connected to a U-shaped frame 14, and two mounting shells 15 are fixedly connected to the side of the U-shaped frame 14 away from the mounting base 3, and a detection head 16 is connected to the mounting shell 15 in a limited sliding manner. A sensor 17 is installed in the mounting shell 15, and a first spring is fixed between the sensor 17 and the adjacent detection head 16; two centering components are respectively arranged on adjacent mounting shells 15, and are used to center the sample relative to the dynamic support block 6 and the fixed support block 7; an adjustment component is provided on the mounting base 3, and is used to adjust the position of the dynamic support base 5.

[0047] The above scheme aims to solve the problem that the stepped position of the existing limit block wears out after long-term use, causing the sample to deflect before the test begins (after the support and positioning of the sample is completed, there is an angle between the sample and the swing axis of the pendulum 2, so that the impact force applied by the pendulum 2 to the sample is not perpendicular to the surface of the sample, that is, the sample will produce uneven stress distribution at the moment of impact, which is different from the stress distribution in the sample during normal testing, affecting the accurate evaluation of the impact resistance of the sample); this scheme uses the detection head 16 to push the sample into contact with the vertical support surfaces on the fixed support block 7 and the dynamic support block 6, on the one hand to straighten the sample, and on the other hand to judge whether the sample is deflected based on the comparison of the elastic forces of the adjacent first springs of the two sensors 17; the vertical support surface of the fixed support block 7 and the vertical support surface of the dynamic support block 6 are not in the same plane. Since the sample is subjected to the horizontal impact force of the pendulum 2 during the test, the vertical support surface is prone to wear. When the degree of wear on the two vertical support surfaces is not the same, the vertical support surface of the fixed support block 7 and the vertical support surface of the dynamic support block 6 are not in the same plane. At the same time, the vertical support surface on one side can be adjusted to move left and right to change the orientation of the sample when it is positioned on the fixed support block 7 and the dynamic support block 6, and then the sample can be readjusted to a state parallel to the swing axis of the pendulum 2; the sensor 17 can be a strain gauge; the first spring between the sensor 17 and the adjacent detection head 16 is a linear spring; the left end of the detection head 16 is hemispherical, which can reduce the contact area between the detection head 16 and the sample, thereby reducing the friction between the two; the moving path of the dynamic support seat 5 is perpendicular to the swing axis of the pendulum 2, and the central axis of the telescopic end of the electric push rod 13 is located in the plane where the center of the pendulum 2 is located during the swing process. When the sample is not tilted, the compression amount of the adjacent first springs of the two sensors 17 is the same, that is, the readings of the two sensors 17 are equal; initially, the distance between the two detection heads 16 is less than the length of the sample, and the distance between the two mounting shells 15 is greater than or equal to the distance between the fixed support block 7 and the dynamic support block 6 to prevent the pendulum 2 from colliding with the mounting shell 15.

[0048] See also Figure 6 The centering component includes: a spring telescopic rod 18, which is limitedly slidably connected to the mounting shell 15, a second spring is fixed between the spring telescopic rod 18 and the adjacent mounting shell 15, and a pull rope 19 is fixed between the spring telescopic rod 18 and the adjacent detection head 16.

[0049] In the above scheme, the position of the sample is adjusted by utilizing the opposite movement of the front and rear spring telescopic rods 18; the two spring telescopic rods 18 are respectively located on the opposite sides of the two mounting shells 15, and initially the distance between the telescopic ends of the two spring telescopic rods 18 is greater than the length of the sample in the front-to-back direction, and the ends of the telescopic ends of the spring telescopic rods 18 can be embedded with steel balls to reduce the friction resistance encountered when the telescopic ends slide along the vertical support surface of the movable support block 6 or the vertical support surface of the fixed support block 7.

[0050] See also Figure 3 、 Figure 7 and Figure 8 The adjustment component includes: a connecting rod 20, which is rotatably connected to the dynamic support seat 5 and threadedly connected to the mounting seat 3. The connecting rod 20 is fixedly connected to the transmission arc block 21; a power piece 23, which is fixed to the dynamic support seat 5. The output shaft of the power piece 23 is fixedly connected to the transmission disk 22. An extrusion portion 221 is provided in the transmission disk 22. The extrusion portion 221 is used to extrude the transmission arc block 21.

[0051] In the above scheme, the position of the dynamic support seat 5 is adjusted based on the difference between the readings of the two sensors 17; if the reading of the front sensor 17 is greater than the reading of the rear sensor 17, it means that the rear end of the sample is offset to the left, and the power member 23 is started at this time. The power member 23 drives the connecting rod 20 to rotate, and the connecting rod 20 drives the dynamic support seat 5 to move right through the thread. At this time, the dynamic support seat 5 drives the dynamic support block 6 to move right, and the dynamic support block 6 drives the rear end of the sample to the right, so that the compression amount of the first spring adjacent to the rear detection head 16 increases, that is, the reading of the rear sensor 17 increases, until the readings of the front and rear sensors 17 are equal, then it means that the sample has been straightened, and the power member 23 can be stopped; the power member 23 can be a stepping motor.

[0052] The working principle of the above scheme is as follows: after the sample is placed on the horizontal support surface of the dynamic support block 6 and the fixed support block 7 by the conveyor belt 9, the conveyor belt 9 is stopped and the electric push rod 13 is started. The telescopic end of the electric push rod 13 contracts and drives the U-shaped frame 14 to move left. The U-shaped frame 14 drives the two mounting shells 15 to move left. The mounting shell 15 drives the detection head 16 and the spring telescopic rod 18 to move together, so that the detection head 16 gradually approaches the sample. Finally, the detection head 16 contacts the sample and stops moving. At this time, the mounting shell 15 continues to move, compressing the first spring adjacent to the detection head 16, so that the sensor 17 reading increases; when the mounting shell 15 moves left relative to the detection head 16, the detection head 16 moves by pulling the spring telescopic rod 18 through the pull rope 19, so that the distance between the two spring telescopic rods 18 gradually decreases, and the telescopic end of the spring telescopic rod 18 on one side first contacts the sample, and The sample is pushed to move until the spring telescopic rod 18 on the other side also contacts the sample. Then, the two spring telescopic rods 18 stop moving towards each other and compress the second spring adjacent to the two spring telescopic rods 18. At this time, the electric push rod 13 is stopped to determine whether the readings of the two sensors 17 are the same. If they are the same, the electric push rod 13 is started and the telescopic end of the electric push rod 13 is reset. If they are different, the power part 23 is started to adjust the position of the dynamic support seat 5 until the readings of the two sensors 17 are the same. At this time, the electric push rod 13 is started and the telescopic end of the electric push rod 13 is reset. At this time, the sample is installed, and the shell 1 is started to swing the pendulum 2. When the pendulum 2 swings to a vertical state, it collides with the sample and breaks the sample. Then the pendulum 2 continues to swing. At this point, the single test process is ended, and the worker can read the impact absorption energy absorbed by the sample according to the display screen on the shell 1.

[0053] When the electric push rod 13 is reset, the telescopic end of the electric push rod 13 drives the U-shaped frame 14, the mounting shell 15 and the spring telescopic rod 18 to move right. At this time, the detection head 16 remains stationary under the action of the adjacent first spring, and the two spring telescopic rods 18 move away from each other under the action of the adjacent second spring and lose contact with the sample. As the mounting shell 15 moves, when the detection head 16 is reset relative to the adjacent mounting shell 15, the mounting shell 15 drives the detection head 16 to move right and reset. In this way, while keeping the sample squeezed against the two vertical support surfaces, the spring telescopic rod 18 is first made to lose contact with the sample, thereby preventing the sample from shifting due to uneven force on the sample after the position adjustment is completed.

[0054] See also Figure 7-10 , and also includes: multiple elastic members 24, all of which are arranged on the dynamic support seat 5, the elastic members 24 are fixedly connected to the limiting columns 25, the dynamic support seat 5 and the mounting seat 3 are in contact with the limiting columns 25 and there is friction, and a plurality of limiting grooves 26 are provided on the dynamic support seat 5, and the number of limiting grooves 26 is equal to the number of elastic members 24, and the multiple elastic members 24 are respectively fixed in adjacent limiting grooves 26.

[0055] In the above scheme, the elastic member 24 is used to push the limiting column 25 to abut between the dynamic support seat 5 and the mounting seat 3, and the limiting column 25 is used to lock the relative position of the dynamic support seat 5 and the mounting seat 3, so as to share the force dispersed on the dynamic support seat 5 when the specimen is impacted, reduce the force at the threaded connection between the connecting rod 20 and the mounting seat 3, and maintain the accuracy of the threaded transmission between the connecting rod 20 and the mounting seat 3; the number of elastic members 24 and limiting columns 25 can be flexibly adjusted according to the size of the dynamic support seat 5. In this article, the number of elastic members 24 and limiting columns 25 are both six; the number of limiting grooves 26 is six, and all It is divided into two groups and is located on the front and rear sides of the dynamic support seat 5 respectively; the horizontal cross-section of the limit groove 26 is a right triangle. In the direction from left to right, the depth of the limit groove 26 gradually decreases to zero, and the diameter of the limit column 25 is smaller than the maximum depth of the limit groove 26. The elastic member 24 is initially in a compressed and force-storing state. The limit column 25 always has a tendency to move to the right under the elastic action of the adjacent elastic member 24. Initially, the dynamic support seat 5 and the mounting seat 3 are both in contact with the limit column 25. The limit column 25 relies on the friction between it and the dynamic support seat 5 and the mounting seat 3 to limit the dynamic support seat 5 in one direction.

[0056] See also Figure 7-12 , it also includes: a branch rod 27, which is limited and slidably connected to the dynamic support seat 5 and is at the same height as the limit groove 26. The branch rod 27 is slidably connected to a transmission member 28, and a third spring is fixed between the transmission member 28 and the dynamic support seat 5. The transmission member 28 is fixedly connected to an extrusion member 29 that is sealed and slidably connected to the branch rod 27. The position of the branch rod 27 near the adjacent limit groove 26 is sealed and limited and slidably connected to the limit rod 30. The limit rod 30 is used to squeeze the adjacent limit column 25; the transmission disk 22 is slidably connected to an extrusion block 31 on one side near the dynamic support seat 5, and there is friction between the extrusion block 31 and the transmission disk 22. An inclined surface is provided on the extrusion block 31, and the inclined surface of the extrusion block 31 is used to squeeze the transmission member 28. The friction force between the extrusion block 31 and the transmission disk 22 is greater than the elastic force of the third spring between the transmission member 28 and the dynamic support seat 5; there is friction between the branch rod 27 and the dynamic support seat 5.

[0057] In the above scheme, the purpose is to release the limit column 25 from the limit of the dynamic support seat 5 by the relative rotation between the transmission arc block 21 and the transmission disk 22; the length of the projection of the inclined surface on the extrusion block 31 in the direction of the central axis of the transmission disk 22 is equal to the maximum distance that the extrusion member 29 can move relative to the dynamic support seat 5; the extrusion member 29 is composed of a thin rod and three pistons, the piston at the right end of the extrusion member 29 is fixedly connected to the transmission member 28, and the left side of the single piston on the extrusion member 29, the branch rod 27 and the two adjacent limit rods 30 form a chamber, which Liquid medium can be stored inside; initially, the limit rod 30 is located on the right side of the adjacent limit column 25, and the minimum distance between the two adjacent limit columns 25 in front and behind is greater than the maximum distance between the two limit rods 30 in front and behind; the friction force between the branch rod 27 and the dynamic support seat 5 is used to limit the movement sequence of the branch rod 27 and the limit rod 30, so that the limit rod 30 can quickly release the limit on the limit column 25, and then the limit column 25 can be quickly and effectively stuck between the mounting seat 3 and the dynamic support seat 5 under the elastic action of the adjacent elastic member 24, and limit the dynamic support seat 5.

[0058] The working principle of the above-mentioned release of the limit column 25 on the dynamic support seat 5 is as follows: when the dynamic support seat 5 needs to move to the left, the output shaft of the power member 23 drives the transmission plate 22 to rotate clockwise, and the transmission plate 22 drives the extrusion block 31 to rotate through friction. The inclined surface of the extrusion block 31 contacts the transmission member 28 and pushes the transmission member 28 to move to the left (at this time, the branch rod 27 is in a stationary state due to the friction between it and the dynamic support seat 5), compressing the third spring adjacent to the transmission member 28, and the transmission member 28 drives the extrusion member 29 to move, so that the shapes of the three chambers in the branch rod 27 change, and the liquid medium in the three chambers in the branch rod 27 all flow to the left and push the two adjacent limit rods 30 to protrude out of the branch rod 27. When 30 is fully extended out of the branch rod 27, the extrusion piece 29 can no longer move left relative to the branch rod 27. At this time, the transmission piece 28 pushes the branch rod 27 to move left through the extrusion piece 29, and the branch rod 27 drives the six limit rods 30 to move together. The limit rod 30 pushes the adjacent limit column 25 to the left and compresses the adjacent elastic member 24 (at this time, the limit column 25 releases the limit on the dynamic support seat 5, the transmission piece 28 slides to the end of the inclined surface of the extrusion block 31 and limits the extrusion block 31, so that the extrusion block 31 stops circumferential rotation, and the transmission arc block 21 contacts the extrusion part 221). As the transmission disk 22 rotates, the extrusion part 221 drives the connecting rod 20 to rotate through the transmission arc block 21, and the connecting rod 20 drives the dynamic support seat 5 to move left.

[0059] As the dynamic support seat 5 moves to the left, the sample is gradually straightened. At this time, the power piece 23 rotates counterclockwise, and the output shaft of the power piece 23 drives the transmission plate 22 to rotate. The transmission plate 22 drives the extrusion block 31 to rotate circumferentially through friction, so that the transmission piece 28 slides along the inclined surface of the extrusion block 31. The transmission piece 28 drives the extrusion piece 29 to move right under the action of the adjacent third spring. The extrusion piece 29 drives the liquid medium in the three chambers in the branch rod 27 to flow and retracts the six limit rods 30 into the branch rod 27. At this time, the limit column 25 is quickly reset under the action of the adjacent elastic piece 24, and is guided by the adjacent limit groove 26 to be stuck between the mounting seat 3 and the dynamic support seat 5, limiting the dynamic support seat 5. Subsequently, the transmission piece 28 drives the branch rod 27 to move right and reset through the extrusion piece 29. At this time, the transmission piece 28 loses contact with the extrusion block 31 and resets, stopping the power piece 23.

[0060] When the dynamic support seat 5 needs to be moved to the right, it is only necessary to make the output shaft of the power member 23 drive the transmission disk 22 to rotate counterclockwise. The transmission disk 22 drives the connecting rod 20 to move through the extrusion part 221 and the transmission arc block 21, and the connecting rod 20 drives the dynamic support seat 5 to move to the right through the thread. At this time, the limit column 25 has a tendency to move to the left relative to the adjacent limit groove 26 under the action of the friction between it and the mounting seat 3, so that the limit column 25 cannot limit the dynamic support seat 5.

[0061] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. An impact test device for testing the mechanical properties of oil drill pipes, characterized in that: include: A housing (1), wherein the housing (1) is rotatably connected to a pendulum (2), the housing (1) is fixedly connected to a mounting seat (3), the mounting seat (3) is fixedly connected to a fixed support seat (4) and slidably connected to a dynamic support seat (5), the upper side of the dynamic support seat (5) is fixedly connected to a dynamic support block (6), and the upper side of the fixed support seat (4) is fixedly connected to a fixed support block (7); A mounting frame (8) is fixedly connected to a side of the housing (1) close to the fixed support block (7); a conveyor belt (9) is installed on the mounting frame (8); and a plurality of push blocks (10) are fixedly connected to the conveyor belt (9); A material storage rack (11) is fixed to the mounting rack (8) and is located above the conveyor belt (9); A limiting member (12) fixedly connected to the fixed support block (7); A detection component, arranged on the mounting seat (3), for detecting and adjusting the position of the sample; The detection component includes: An electric push rod (13) is mounted on the mounting seat (3), a telescopic end of the electric push rod (13) is fixedly connected to a U-shaped frame (14), a side of the U-shaped frame (14) away from the mounting seat (3) is fixedly connected to two mounting shells (15), a detection head (16) is limitedly slidably connected in the mounting shell (15), a sensor (17) is installed in the mounting shell (15), and a first spring is fixedly connected between the sensor (17) and the adjacent detection head (16); Two centering components, respectively arranged on adjacent mounting shells (15), for centering the specimen relative to the movable support block (6) and the fixed support block (7); An adjustment component, disposed on the mounting seat (3), and used for adjusting the position of the dynamic support seat (5); The centering component includes: A spring telescopic rod (18) is connected to the mounting shell (15) in a limited sliding manner, a second spring is fixedly connected between the spring telescopic rod (18) and the adjacent mounting shell (15), and a pull rope (19) is fixedly connected between the spring telescopic rod (18) and the adjacent detection head (16).

2. The impact test equipment for testing the mechanical properties of oil drill pipe according to claim 1, characterized in that: In the direction from the movable support seat (5) to the fixed support seat (4), the height of the conveyor belt (9) gradually decreases.

3. The impact testing equipment for testing the mechanical properties of oil drill pipe according to claim 1, characterized in that: A limiting strip (111) is fixedly connected inside the storage rack (11), and the limiting strip (111) is used to limit the position of the sample inside the storage rack (11).

4. The impact testing equipment for testing the mechanical properties of oil drill pipe according to claim 1, characterized in that: The adjustment component includes: A connecting rod (20) is rotatably connected to the dynamic support seat (5) and is threadedly connected to the mounting seat (3); the connecting rod (20) is fixedly connected to a transmission arc block (21); A power member (23) is fixedly connected to the dynamic support seat (5); an output shaft of the power member (23) is fixedly connected to a transmission disc (22); an extrusion portion (221) is provided in the transmission disc (22); and the extrusion portion (221) is used to extrude the transmission arc block (21).

5. The impact testing device for testing the mechanical properties of oil drill pipe according to claim 4, characterized in that: Also includes: A plurality of elastic members (24) are all provided on the dynamic support seat (5), the elastic members (24) are fixedly connected to the limiting column (25), the dynamic support seat (5) and the mounting seat (3) are in contact with the limiting column (25) and have friction, a plurality of limiting grooves (26) are provided on the dynamic support seat (5), and the number of the limiting grooves (26) is equal to the number of the elastic members (24), and the plurality of elastic members (24) are respectively fixedly connected to adjacent limiting grooves (26).

6. The impact testing device for testing the mechanical properties of oil drill pipe according to claim 5, characterized in that: Also includes: The branch rod (27) is connected to the dynamic support seat (5) in a limited sliding manner and is located at the same height as the limiting groove (26). The branch rod (27) is slidably connected to a transmission member (28). A third spring is fixed between the transmission member (28) and the dynamic support seat (5). The transmission member (28) is fixed to an extrusion member (29) that is sealed and slidably connected to the branch rod (27). The position of the branch rod (27) close to the adjacent limiting groove (26) is sealed and limitedly slidably connected to the limiting rod (30). The limiting rod (30) is used to squeeze the adjacent limiting column (25).

7. The impact testing device for testing the mechanical properties of oil drill pipe according to claim 6, characterized in that: A squeeze block (31) is slidably connected to one side of the transmission disc (22) close to the dynamic support seat (5), and friction exists between the squeeze block (31) and the transmission disc (22). An inclined surface is provided on the squeeze block (31), and the inclined surface of the squeeze block (31) is used to squeeze the transmission member (28). The friction between the squeeze block (31) and the transmission disc (22) is greater than the elastic force of the third spring between the transmission member (28) and the dynamic support seat (5).

8. The impact testing equipment for testing the mechanical properties of oil drill pipes according to claim 7, characterized in that: There is friction between the branch rod (27) and the dynamic support seat (5).

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