A tensile test fixture and test method for non-metallic parts of internal blowout prevention tools

Abstract

The present invention discloses a tensile testing fixture for non-metallic parts of an internal blowout prevention tool and a testing method thereof, which belongs to the technical field of tensile testing. The present invention drives two test assemblies to swap positions by switching the loading assembly, so that the clamped sample can be smoothly placed in the arc cover for side tensile testing operation, and adopts a double-station switching loading operation, so that continuous loading operation can be achieved through reciprocating, so that the double-station switching loading can greatly improve the sample testing efficiency. Secondly, the protective plate in the switching loading assembly can cooperate with the arc cover to maintain a closed processing area to ensure tensile safety, and during the rotation process of the test assembly, it also drives the ball in the limit assembly to be squeezed with the side of the arc cover, so that the ball can push the upper second piston rod to move. The upper second piston rod can move the third piston rod by hydraulically driving the tooth plate to mesh with the third gear, and the position of the stud can be locked, thereby effectively improving the clamping firmness of the sample.

Description

Technical Field

[0001] The present invention relates to the technical field of tensile testing, in particular to a tensile testing tool for non-metallic parts of an internal blowout prevention tool and a testing method thereof. Background Art

[0002] The tensile test of non-metallic components in internal blowout preventer tools is an important material performance testing method designed to evaluate the mechanical properties and deformation behavior of non-metallic components during the tensile process. During the test, the non-metallic component is fixed between the clamps of a testing machine, and the tensile force is gradually increased until the material breaks. By recording the force and deformation data during the tensile process, the material's stress-strain curve can be analyzed to evaluate its mechanical properties. Key test indicators include tensile strength, yield strength, and elongation at break, which are of great significance to the design, manufacturing, and application of materials.

[0003] Although tensile testing equipment is widely used to evaluate the mechanical properties of non-metallic components in internal blowout preventer tools, current technologies still face significant challenges when handling multiple specimens. Specifically, traditional tensile testing equipment often operates in a serial mode, handling the entire process from sample cutting, clamping, tensile testing, and sample recovery. This means that each sample must be tested individually, significantly increasing the total time required for batch testing.

[0004] Furthermore, existing systems typically require separate drive units for sample cutting and stretching, which undoubtedly increases the overall cost burden. More critically, if the clamping fixture becomes loose during the tensile test, it could not only cause the specimen to accidentally eject, posing a safety hazard, but could also directly interfere with the accuracy of the test results. Furthermore, this looseness could induce abnormal vibration or shock in the loading system, potentially damaging the delicate components within the device, and thus affecting the long-term stability and test accuracy of the device.

[0005] In response to the above problems, the present invention document proposes a tensile test fixture and test method for non-metallic parts of an internal blowout prevention tool. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art of tensile testing equipment, such as the inconvenience of batch testing and the many shortcomings in the tensile process, and to propose a tensile testing fixture for non-metallic parts of an internal blowout prevention tool and a testing method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A tensile test fixture for non-metallic parts of an internal blowout prevention tool, comprising a test device equipped with a stretching and cutting mechanism;

[0009] The stretching and cutting mechanism includes an arc-shaped cover, a switching feeding assembly is provided inside the arc-shaped cover, two test assemblies are provided on the front and rear sides of the switching feeding assembly, and a limit assembly is provided on the test assembly. The limit assembly locks the test assembly by squeezing the arc surfaces on both sides of the arc-shaped cover, and docking rails are installed above the two upper test assemblies. The two docking rails are switched and engaged with the stretching assembly by rotation. The stretching assembly is provided above the arc-shaped cover;

[0010] A cutting drive assembly is provided above the arc-shaped cover, and a cutting assembly is provided below one end of the cutting drive assembly.

[0011] Preferably, the cutting drive assembly includes two piston cylinders, which are connected by a connecting pipe. The two piston cylinders are fixedly installed above and on one side of the arc-shaped cover respectively. A first piston rod is provided inside the piston cylinder, and the first piston rod extends out of the piston cylinder. A first spring is fixedly connected between the top of one of the first piston rods and the top wall of the piston cylinder, and a driving plate is fixedly connected to the bottom end of the other first piston rod.

[0012] Preferably, the cutting assembly includes a platform, which is fixedly connected to one side of the arc cover, and two sliders are fixedly connected above the platform. A drawing platform is set up above the platform, and two slide grooves are provided below the drawing platform, and the drawing platform slides on the slider through the slide grooves.

[0013] Preferably, the upper portion of the drawer is used to store the sample, and a shell is provided above the drawer, a movable platform is slidably provided inside the shell, the upper portion of the movable platform is overlapped with the driving plate, and two second springs are fixedly connected to the lower portion of the movable platform, and the bottom ends of the two second springs are fixedly connected to the bottom wall of the shell;

[0014] A cutting knife and two inner cylinders are installed below the movable platform. The cutting knife is in the shape of a dumbbell. The inner cylinder is located in the cutting knife, and a top block is slidably provided inside the inner cylinder. A third spring is fixedly connected between the top of the top block and the bottom of the inner cylinder.

[0015] Preferably, the stretching assembly includes a stretching device, which is fixedly installed above the arc cover, and the bottom of the stretching device is fixedly connected to a docking block, the docking block is T-shaped, and the internal shape of the docking rail is adapted to the shape of the docking block.

[0016] Preferably, the switching feeding assembly includes a transmission shaft and a motor, the transmission shaft is rotatably mounted on the arc-shaped cover through a bearing, an upper plate is fixedly connected above the transmission shaft, and protective plates are fixedly connected to the left and right sides of the upper plate, the protective plates are arranged in the arc-shaped cover, and two polygonal rods are fixedly connected below the protective plates, and the outer shells of the polygonal rods are provided with polygonal sleeves;

[0017] An adjustment plate is fixed to the middle of the transmission shaft by bolts, and the adjustment plate is also slidably arranged on the polygonal rod;

[0018] The motor is mounted on the bottom wall of the arc-shaped cover, and the output shaft of the motor is fixedly connected to a first gear, one side of the first gear is meshed with a second gear, and the second gear is fixedly connected to the transmission shaft.

[0019] Preferably, the test assembly includes an assembly plate, the upper first piston rod corresponds to the position of one of the upper assembly plates, wherein the two lower assembly plates are fixed below the transmission shaft, the lower part of the protective plate is fixed to the lower assembly plate, and the lower assembly plate is fixedly connected to the bottom end of the polygonal rod, the upper assembly plate is mounted above the adjustment plate, and the two docking rails are respectively fixedly connected to the upper parts of the two upper assembly plates, and the polygonal sleeve is mounted on the upper assembly plate;

[0020] A tester is installed on the assembly plate, one end of the tester is fixedly connected to a splint, a pressure plate is provided in the splint, one side of the pressure plate is fixedly connected to a threaded barrel, the internal thread of the threaded barrel is connected to a stud, the stud is rotatably mounted on the splint through a bearing, and one end of the stud is fixedly connected to a third gear.

[0021] Preferably, the limiting assembly includes an upper cylinder and a side cylinder, and the upper cylinder and the side cylinder are respectively installed on the assembly plate and the tester. The side cylinder and the upper cylinder are connected by a pipe. A third piston rod is provided inside the side cylinder. The third piston rod passes downward out of the side cylinder and is fixedly connected to the tooth plate, and the tooth plate is engaged with the third gear.

[0022] Preferably, an upper second piston rod is provided inside the upper cylinder, and a fourth spring is fixedly connected between one side of the upper second piston rod and the side wall of the upper cylinder. The upper second piston rod passes through the upper cylinder and is fixedly connected to the rolling ball. The rolling ball is slidably arranged on the inner wall of the arc cover, and the two front sides of the arc cover are set as arc surfaces.

[0023] A test method for a tensile test fixture for a non-metallic part of an internal blowout prevention tool comprises the following steps:

[0024] S1. When conducting a tensile test, the specimen is placed between two clamping plates and the threaded barrel is pushed forward by rotating the stud, so that the threaded barrel drives the pressure plate to clamp the specimen on the clamping plates. After clamping, the motor drives the first gear and the second gear to transmit the transmission, and the second gear drives the transmission shaft to rotate. The transmission shaft drives the test assembly and the limit assembly to rotate. When the ball in the limit assembly passes through the curved side of the arc cover, the ball is squeezed and drives the second piston rod to move. The second piston rod pushes the liquid into the side barrel through the pipe, so that the hydraulic pressure drives the third piston rod to drive the tooth plate downward to engage with the third gear, so that the stud position is locked;

[0025] S2. After the two test assemblies are rotated and swapped, the clamped specimen is at the rear. At the same time, the test assemblies drive the docking rail and the docking block to engage. At this time, the test equipment performs an upward stretching movement, allowing the tester to perform a stretching length test on the specimen through the clamping plate. The tester records the data and transmits it to the test equipment.

[0026] S3, placing the sample to be cut on the top of the drawer, and then pushing the drawer to the bottom of the shell so that the top block positions the sample through the third spring;

[0027] S4. When the upper assembly plate moves upward, it squeezes the first piston rod, causing the first piston rod to drive the other first piston rod through hydraulic pressure to drive the driving plate downward. The driving plate applies pressure to the movable table, causing the cutting knife to cut the sample downward into a dumbbell shape. The cut sample is then removed and clamped on the clamping plate again.

[0028] S5. After the specimen is clamped again, the positions of the two test components are swapped, and the broken or deformed specimen is removed. At the same time, the specimen tensile test is performed again in the arc cover.

[0029] Compared with the prior art, the present invention provides a tensile test fixture and test method for non-metallic parts of internal blowout prevention tools, which has the following beneficial effects:

[0030] 1. The internal blowout prevention tool non-metallic parts tensile test fixture and test method thereof, drives the two test assemblies to swap positions by switching the loading assembly, so that the clamped specimen can be smoothly placed in the arc cover for side tensile testing operation, and adopts a double-station switching loading operation, which can meet the requirement of re-clamping the specimen at another station during stretching, so that continuous loading operation can be achieved through reciprocating, so that the double-station switching loading can greatly improve the specimen testing efficiency. Secondly, the protective plate in the switching loading assembly can cooperate with the arc cover to maintain a closed processing area to ensure stretching safety, and during the rotation process of the test assembly, it also drives the ball in the limit assembly to squeeze the side of the arc cover, so that the ball can push the upper second piston rod to move. The upper second piston rod can drive the third piston rod to move by hydraulic pressure, so that the tooth plate is engaged with the third gear, and the position of the stud can be locked, thereby effectively improving the clamping firmness of the specimen.

[0031] 2. The internal blowout prevention tool non-metallic parts tensile test fixture and test method thereof, after switching the two test components, the docking rail and the docking block are engaged, at this time the tensile equipment is stretched upward, so that the tester performs a tensile test on the sample through the clamping plate, when the upper assembly plate applies pressure upward to the first piston rod, so that the first piston rod presses the liquid into the other piston cylinder through the connecting pipe, then the other piston rod and the drive plate are driven by hydraulic pressure to move, and the drive plate can apply pressure downward to the movable table, so that the cutting knife cuts the sample downward, thereby completing the cutting and shape preservation of the sample during the tensile test process, this method can effectively optimize the production process, enhance production flexibility, and reduce costs, and the outer shell is detachable, which is convenient for cutting samples of different shapes, and the drawer adopts pumping feeding, which is convenient for taking and putting materials.

[0032] 3. The internal blowout prevention tool non-metallic parts tensile test fixture and test method thereof can swap the positions of the two test components by switching the feeding component, thereby completing the cyclic feeding operation. After feeding, the tensile test is performed on the specimen by the tensile component in cooperation with the test component, and the upward stretching process of the test component can drive the cutting drive component, so that the cutting drive component can apply pressure to the movable table of the cutting component, so that the cutting knife can smoothly cut the specimen into a dumbbell shape, thereby completing the specimen cutting during the specimen stretching and cutting process. After cutting, the specimen can also be directly clamped, so that this process realizes the entire cyclic process, thereby greatly improving the efficiency of specimen cutting and tensile testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A three-dimensional view of a tensile test fixture for non-metallic parts of an internal blowout prevention tool proposed by the present invention;

[0034] Figure 2 This is a structural view of the connection between the test equipment and the arc cover of the tensile test fixture of the internal blowout prevention tool proposed by the present invention;

[0035] Figure 3 A top perspective view of a non-metallic tensile testing tool for an internal blowout prevention tool proposed by the present invention;

[0036] Figure 4 This is a structural view of the connection between the switching feeding assembly and the tensile assembly of the non-metallic part tensile test fixture of the internal blowout prevention tool proposed by the present invention;

[0037] Figure 5 A three-dimensional view of the curved cover of a non-metallic part tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0038] Figure 6 A perspective view of a cross-section of a cutting drive assembly of a non-metallic tensile testing tool for an internal blowout prevention tool proposed by the present invention;

[0039] Figure 7A three-dimensional view of the cutting assembly of a non-metallic tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0040] Figure 8 A three-dimensional view of a cross-section of a cutting assembly of a non-metallic tensile testing tool for an internal blowout prevention tool proposed by the present invention;

[0041] Figure 9 A three-dimensional view of a top view of the outer shell of a non-metallic tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0042] Figure 10 A three-dimensional view of a switching and loading assembly of a non-metallic part tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0043] Figure 11 A three-dimensional view of a test assembly of a non-metallic tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0044] Figure 12 A three-dimensional view of the transmission shaft of a non-metallic tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0045] Figure 13 A three-dimensional view of a clamping plate for a non-metallic tensile test fixture for an internal blowout prevention tool proposed by the present invention;

[0046] Figure 14 This is a three-dimensional view of the cross section of a limiting component of a tensile test fixture for non-metallic parts of an internal blowout prevention tool proposed by the present invention.

[0047] In the figure: 100, test equipment; 200, stretching and cutting mechanism; 201, arc cover; 202, stretching assembly; 2021, stretching equipment; 2022, docking block; 203, switching feeding assembly; 2031, transmission shaft; 2032, protective plate; 2033, upper plate; 2034, adjustment plate; 2035, second gear; 2036, first gear; 2037, motor; 2038, polygonal rod; 2039, polygonal sleeve; 204, test assembly; 2041, assembly plate; 2042, tester; 2043, clamping plate; 2044, pressing plate; 2045, threaded barrel; 2046, stud; 2047, third gear; 205, cutting drive assembly; 2051, Piston cylinder; 2052, first piston rod; 2053, first spring; 2054, connecting pipe; 2055, drive plate; 206, cutting assembly; 2061, platform; 2062, slider; 2063, drawer; 2064, outer shell; 2065, second spring; 2066, movable table; 2067, inner cylinder; 2068, cutting knife; 2069, third spring; 20610, top block; 20611, slide; 207, limit assembly; 2071, upper cylinder; 2072, second upper piston rod; 2073, rolling ball; 2074, fourth spring; 2075, pipeline; 2076, side cylinder; 2077, third piston rod; 2078, tooth plate; 208, docking rail. DETAILED DESCRIPTION

[0048] The technical solutions 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 only part of the embodiments of the present invention, rather than all the embodiments.

[0049] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0050] Example 1: Reference Figure 1-Figure 5 and Figure 10-14 A tensile test fixture for non-metallic parts of an internal blowout prevention tool includes a test device 100 equipped with a stretching and cutting mechanism 200;

[0051] The stretching and cutting mechanism 200 includes an arc-shaped cover 201, and a switching feeding assembly 203 is provided inside the arc-shaped cover 201. The switching feeding assembly 203 includes a transmission shaft 2031 and a motor 2037. The transmission shaft 2031 is rotatably mounted on the arc-shaped cover 201 through a bearing. An upper plate 2033 is fixedly connected above the transmission shaft 2031. Protective plates 2032 are fixedly connected to the left and right sides of the upper plate 2033. The protective plates 2032 are provided in the arc-shaped cover 201. The protective plates 2032 rotate with the transmission shaft 2031, and the protective plates 2032 cooperate with the arc-shaped cover 201 to form a closed environment for the stretching area, thereby improving the safety of the stretching test operation. Two polygonal rods 2038 are fixedly connected below the protective plate 2032. The polygonal rods 203 8. The outer cover is provided with a polygonal sleeve 2039, which can slide smoothly on the polygonal rod 2038, so that the upper assembly plate 2041 can move smoothly up and down. The middle part of the transmission shaft 2031 is fixed with an adjustment plate 2034 by bolts. The upper assembly plate 2041 can be supported by the adjustment plate 2034 to improve the stability of the assembly plate 2041. The adjustment plate 2034 can adjust the position on the transmission shaft 2031 and can be locked in position by bolts, so as to meet the requirements of tensile testing of specimens of different lengths. The adjustment plate 2034 is also slidably provided on the polygonal rod 2038. The motor 2037 is installed on the bottom wall of the arc cover 201, and the output shaft of the motor 2037 is fixedly connected to the first gear 2036. The first gear 2036 A second gear 2035 is meshed on one side, and the first gear 2036 is transmitted with the second gear 2035 to realize power transmission, thereby driving the transmission shaft 2031 to rotate. The second gear 2035 is fixedly connected to the transmission shaft 2031, and two test assemblies 204 are provided on the front and rear sides of the switching feeding assembly 203. The test assembly 204 includes an assembly plate 2041, and the upper first piston rod 2052 corresponds to the position of one of the upper assembly plates 2041, wherein the lower two assembly plates 2041 are fixed to the bottom of the transmission shaft 2031, and the lower part of the protective plate 2032 is fixed to the lower assembly plate 2041, and the lower assembly plate 2041 is fixedly connected to the bottom end of the polygonal rod 2038, and the upper assembly plate 20 41 is set up above the adjustment plate 2034, and the two docking rails 208 are respectively fixedly connected to the upper parts of the two assembly plates 2041 above. The polygonal sleeve 2039 is installed on the upper assembly plate 2041. A tester 2042 is installed on the assembly plate 2041. The tester 2042 can obtain the data of the tensile test and transmit it to the test equipment 100 for data display. One end of the tester 2042 is fixedly connected to a clamping plate 2043. A pressing plate 2044 is provided in the clamping plate 2043. By arranging the pressing plate 2044 in the clamping plate 2043, the clamping plate 2043 can prevent the pressing plate 2044 from rotating, thereby allowing the threaded cylinder 2045 to smoothly push the pressing plate 2044 to move. A threaded cylinder 2045 is fixedly connected to one side of the pressing plate 2044.The internal thread of the threaded barrel 2045 is connected to a stud 2046. A handle at one end of the stud 2046 is used to easily rotate the stud 2046 and transmit the threaded barrel 2045, so that the threaded barrel 2045 can drive the pressure plate 2044 to fix the sample on the clamping plate 2043 to prevent the sample from falling off. The stud 2046 is rotatably mounted on the clamping plate 2043 through a bearing. One end of the stud 2046 is fixedly connected to the third gear 2047.

[0052] The test assembly 204 is provided with a limit assembly 207, which includes an upper cylinder 2071 and a side cylinder 2076. The upper cylinder 2071 and the side cylinder 2076 are respectively mounted on the assembly plate 2041 and the tester 2042. The side cylinder 2076 is connected to the upper cylinder 2071 through a pipe 2075. A third piston rod 2077 is provided inside the side cylinder 2076. The third piston rod 2077 passes through the side cylinder 2076 downward and is fixedly connected to the tooth plate 2078. The tooth plate 2078 is engaged with the third gear 2047. The upper second piston rod 2072 is provided inside the upper cylinder 2071. A fourth spring 2074 is fixedly connected between one side and the side wall of the upper cylinder 2071. When the ball 2073 is separated from the arc cover 201, the reset force of the fourth spring 2074 can drive the second piston rod 2072 to reset, so that the second piston rod 2072 can drive the third piston rod 2077 to move upward through the hydraulic pressure, so that the tooth plate 2078 can automatically remove the engagement with the third gear 2047, which is convenient for the subsequent operation of fixing the sample. The second piston rod 2072 passes through the upper cylinder 2071 and is fixedly connected to the ball 2073. The ball 2073 is slidably arranged on the inner wall of the arc cover 201, and the front two sides of the arc cover 201 The two sides of the arc cover 201 are set as arc surfaces, so that the rolling ball 2073 can be squeezed and displaced when passing through the side, thereby controlling the movement of the second piston rod 2072, and the third piston rod 2077 and the tooth plate 2078 are driven by hydraulic pressure to move, so that the tooth plate 2078 and the third gear 2047 are engaged to achieve the purpose of locking the stud 2046. The limit assembly 207 locks the test assembly 204 by squeezing the arc surfaces on both sides of the arc cover 201, and the upper parts of the two test assemblies 204 are equipped with docking rails 208. The two docking rails 208 are engaged with the stretching assembly 202 by rotation. Component 202 is arranged above the arc cover 201. The stretching assembly 202 includes a stretching device 2021. The stretching device 2021 is fixedly installed above the arc cover 201, and a docking block 2022 is fixedly connected to the bottom of the stretching device 2021. The docking block 2022 is T-shaped. The internal shape of the docking rail 208 is adapted to the shape of the docking block 2022. By setting the docking block 2022 and the docking rail 208 to be T-shaped, the docking rail 208 can be smoothly engaged with the docking block 2022, so that the docking block 2022 can smoothly pull up the docking rail 208 and the assembly plate 2041, thereby facilitating the tensile test operation of the specimen.

[0053] A cutting drive assembly 205 is provided above the arc-shaped cover 201 , and a cutting assembly 206 is provided below one end of the cutting drive assembly 205 .

[0054] In this embodiment, the first gear 2036 and the second gear 2035 are driven by the motor 2037, the second gear 2035 drives the transmission shaft 2031 to rotate, and the transmission shaft 2031 drives the two test assemblies 204 to swap positions, so that the clamped sample can be smoothly placed in the arc cover 201 for side tensile testing. In addition, a double-station switching loading operation is adopted, which can meet the requirement of re-clamping the sample at another station during stretching. In this way, continuous loading operation can be achieved by reciprocating, so that the double-station switching loading can greatly improve the sample testing efficiency. Secondly, By switching the protective plate 2032 in the loading assembly 203, the arc cover 201 can be cooperated to maintain a closed processing area to ensure stretching safety. In addition, during the rotation of the test assembly 204, the ball 2073 and the side of the arc cover 201 are squeezed, so that the ball 2073 can push the upper second piston rod 2072 to move. The upper second piston rod 2072 can hydraulically drive the third piston rod 2077 to move, so that the tooth plate 2078 is engaged with the third gear 2047, and the position of the stud 2046 can be locked, thereby effectively improving the clamping firmness of the sample.

[0055] Example 2: Reference Figure 6-Figure 9 , a non-metallic tensile test tool for an internal blowout prevention tool, including a cutting drive assembly 205, which includes two piston cylinders 2051, the two piston cylinders 2051 are connected by a pipe 2054, and the two piston cylinders 2051 are fixedly mounted on the top and one side of the arc cover 201 respectively. A first piston rod 2052 is provided inside the piston cylinder 2051, and the first piston rod 2052 extends out of the piston cylinder 2051. A first spring 2053 is fixedly connected between the top of one of the first piston rods 2052 and the top wall of the piston cylinder 2051. When the assembly plate 2041 is reset downward, the first spring 2053 drives the first piston rod 2052 to reset downward, so that the first piston rod 2052 can drive the other first piston rod 2052 to reset upward through hydraulic pressure, so that the driving plate 2055 is reset upward, and the bottom end of the other first piston rod 2052 is fixedly connected to the driving plate 2055;

[0056] The cutting assembly 206 includes a platform 2061, which is fixedly connected to one side of the arc-shaped cover 201. Two sliders 2062 are fixedly connected to the top of the platform 2061, and a drawer 2063 is set up above the platform 2061. Two slide grooves 20611 are provided below the drawer 2063. The drawer 2063 slides on the sliders 2062 through the slide grooves 20611. The sliders 2062 can guide the drawer 2063 to maintain the stability of the drawer 2063. The top of the drawer 2063 is used to store samples, and a shell 2064 is provided above the drawer 2063. A movable platform 2066 is slidingly provided inside the shell 2064. The top of the movable platform 2066 is overlapped with the driving plate 2055, and the bottom of the movable platform 2066 is fixedly connected with two A second spring 2065. When the driving plate 2055 is reset upward, the second spring 2065 can drive the movable platform 2066 to reset upward smoothly, so that the cutting knife 2068 is smoothly reset. The bottom ends of the two second springs 2065 are fixedly connected to the bottom wall of the shell 2064. The cutting knife 2068 and two inner cylinders 2067 are installed below the movable platform 2066. The cutting knife 2068 is in the shape of a dumbbell. The inner cylinder 2067 is located in the cutting knife 2068, and a top block 20610 is slidably provided inside the inner cylinder 2067. A third spring 2069 is fixedly connected between the top of the top block 20610 and the bottom of the inner cylinder 2067. The elastic force of the third spring 2069 enables the top block 20610 to press the sample, thereby positioning the sample;

[0057] In this embodiment: after the two test components 204 are switched, the docking rail 208 is engaged with the docking block 2022. At this time, the stretching equipment 2021 is stretched upward, so that the tester 2042 performs a tensile test on the sample through the clamping plate 2043. When the upper assembly plate 2041 applies pressure upward to the first piston rod 2052, the first piston rod 2052 presses the liquid into the other piston cylinder 2051 through the connecting pipe 2054, and the other piston rod and the driving plate 2055 are driven by hydraulic pressure to move. The driving plate 2055 can apply pressure downward to the movable table 2066, so that the cutting knife 2068 cuts the sample downward. In this way, the sample can be cut and kept in shape during the tensile test process. This method can effectively optimize the production process, enhance production flexibility, and reduce costs. In addition, the shell 2064 is detachable, which is convenient for cutting samples of different shapes. At the same time, the drawer 2063 adopts a pumping feeding method, which is convenient for taking and putting materials.

[0058] Example 3: Reference Figure 3-Figure 5A non-metallic tensile test tool for an internal blowout prevention tool includes a stretching and cutting mechanism 200. The stretching and cutting mechanism 200 includes an arc-shaped cover 201. A switching loading component 203 is provided inside the arc-shaped cover 201. Two test components 204 are provided on the front and rear sides of the switching loading component 203. A limit component 207 is provided on the test component 204. The limit component 207 locks the test component 204 by squeezing the arc surfaces on both sides of the arc-shaped cover 201. A docking rail 208 is installed above the two upper test components 204. The two docking rails 208 are switched and engaged with the stretching component 202 by rotation. The stretching component 202 is provided above the arc-shaped cover 201.

[0059] A cutting drive assembly 205 is provided above the arc-shaped cover 201 , and a cutting assembly 206 is provided below one end of the cutting drive assembly 205 .

[0060] In this embodiment: by switching the loading component 203, the positions of the two test components 204 can be swapped to complete the cyclic feeding operation. After feeding, the tensile test is performed on the sample through the tensile component 202 in cooperation with the test component 204, and the upward stretching process of the test component 204 can drive the cutting drive component 205, so that the cutting drive component 205 can apply pressure to the movable table 2066 of the cutting component 206, so that the cutting knife 2068 can smoothly cut the sample into a dumbbell shape, thereby completing the sample cutting during the sample stretching and cutting process. After cutting, the sample can also be directly clamped, so that this process realizes the entire cyclic process, thereby greatly improving the efficiency of sample cutting and tensile testing.

[0061] A test method for a tensile test fixture for a non-metallic part of an internal blowout prevention tool comprises the following steps:

[0062] S1. When conducting a tensile test, the sample is placed between the two clamping plates 2043 and the threaded cylinder 2045 is pushed forward by rotating the stud 2046, so that the threaded cylinder 2045 drives the pressure plate 2044 to clamp the sample on the clamping plate 2043. After clamping, the motor 2037 drives the first gear 2036 and the second gear 2035 to transmit, and the second gear 2035 drives the transmission shaft 2031 to rotate. The transmission shaft 2031 drives the test assembly 204 and the limit assembly 207 to rotate. When the ball 2073 in the limit assembly 207 passes the curved side of the curved cover 201, the ball 2073 is squeezed and drives the upper second piston rod 2072 to move. The upper second piston rod 2072 pushes the liquid into the side cylinder 2076 through the pipe 2075, so that the hydraulic drive third piston rod 2077 drives the tooth plate 2078 downward to engage with the third gear 2047, so that the position of the stud 2046 is locked.

[0063] S2. After the two test assemblies 204 are rotated and swapped, the clamped specimen is at the rear. Simultaneously, the test assemblies 204 drive the docking rail 208 to engage with the docking block 2022. At this point, the test equipment 100 performs an upward stretching motion, causing the tester 2042 to perform a stretching length test on the specimen via the clamping plate 2043. The tester 2042 records the data and transmits it to the test equipment 100.

[0064] S3, placing the sample to be cut on the top of the drawer 2063, and then pushing the drawer 2063 to the bottom of the housing 2064, so that the top block 20610 positions the sample through the third spring 2069;

[0065] S4. When the upper assembly plate 2041 moves upward, it squeezes the first piston rod 2052, causing the first piston rod 2052 to drive the other first piston rod 2052 through hydraulic pressure to drive the driving plate 2055 to move downward. The driving plate 2055 applies pressure to the movable table 2066, causing the cutting knife 2068 to cut the sample downward into a dumbbell shape. The cut sample is then removed and clamped on the clamping plate 2043 again.

[0066] S5. After the sample is clamped again, the positions of the two test assemblies 204 are swapped, and the broken or deformed sample is removed. At the same time, the sample tensile test is performed again in the arc cover 201.

[0067] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tensile test fixture for non-metallic parts of an internal blowout prevention tool, comprising a test device (100), characterized in that: The testing device (100) is equipped with a stretching and cutting mechanism (200); The stretching and cutting mechanism (200) includes an arc-shaped cover (201), a switching feeding assembly (203) is provided inside the arc-shaped cover (201), two test assemblies (204) are provided on both the front and rear sides of the switching feeding assembly (203), a limiting assembly (207) is provided on the test assembly (204), the limiting assembly (207) locks the test assembly (204) by squeezing the arc surfaces on both sides of the arc-shaped cover (201), and the upper parts of the two upper test assemblies (204) are equipped with docking rails (208), the two docking rails (208) are switched and engaged with the stretching assembly (202) by rotation, and the stretching assembly (202) is provided above the arc-shaped cover (201); A cutting drive assembly (205) is provided above the arc-shaped cover (201), and a cutting assembly (206) is provided below one end of the cutting drive assembly (205); The cutting drive assembly (205) includes two piston cylinders (2051), which are connected to each other through a pipe (2054). The two piston cylinders (2051) are fixedly mounted above and on one side of the arc-shaped cover (201), respectively. A first piston rod (2052) is provided inside the piston cylinder (2051), and the first piston rod (2052) extends out of the piston cylinder (2051). A first spring (2053) is fixedly connected between the top of one of the first piston rods (2052) and the top wall of the piston cylinder (2051), and a driving plate (2055) is fixedly connected to the bottom end of the other first piston rod (2052).

2. The non-metallic tensile testing tool for internal blowout prevention tools according to claim 1, characterized in that: The cutting assembly (206) comprises a platform (2061), the platform (2061) being fixedly connected to one side of the arc-shaped cover (201), two sliders (2062) being fixedly connected above the platform (2061), and a drawing platform (2063) being provided above the platform (2061), two slide grooves (20611) being provided below the drawing platform (2063), and the drawing platform (2063) slidingly slides on the sliders (2062) through the slide grooves (20611).

3. The non-metallic tensile testing tool for internal blowout prevention tools according to claim 2, characterized in that: The upper portion of the drawer (2063) is used to store samples, and a housing (2064) is provided above the drawer (2063). A movable platform (2066) is slidably provided inside the housing (2064). The upper portion of the movable platform (2066) is overlapped with the driving plate (2055). Two second springs (2065) are fixedly connected to the lower portion of the movable platform (2066). The bottom ends of the two second springs (2065) are fixedly connected to the bottom wall of the housing (2064). A cutting knife (2068) and two inner cylinders (2067) are installed below the movable platform (2066); the cutting knife (2068) is in the shape of a dumbbell; the inner cylinder (2067) is located in the cutting knife (2068); a top block (20610) is slidably provided inside the inner cylinder (2067); and a third spring (2069) is fixedly connected between the top of the top block (20610) and the bottom of the inner cylinder (2067).

4. A tensile test fixture for non-metallic parts of an internal blowout prevention tool according to claim 3, characterized in that: The stretching assembly (202) comprises a stretching device (2021), the stretching device (2021) is fixedly mounted above the arc-shaped cover (201), and a docking block (2022) is fixedly connected to the bottom of the stretching device (2021), the docking block (2022) is T-shaped, and the internal shape of the docking rail (208) is adapted to the shape of the docking block (2022).

5. The non-metallic tensile testing tool for internal blowout prevention tools according to claim 4, characterized in that: The switching feeding assembly (203) comprises a transmission shaft (2031) and a motor (2037); the transmission shaft (2031) is rotatably mounted on the arc-shaped cover (201) via a bearing; an upper plate (2033) is fixedly connected above the transmission shaft (2031); both left and right sides of the upper plate (2033) are fixedly connected to protective plates (2032); the protective plates (2032) are arranged in the arc-shaped cover (201); two polygonal rods (2038) are fixedly connected below the protective plates (2032); and the outer shells of the polygonal rods (2038) are provided with polygonal sleeves (2039); An adjustment plate (2034) is fixed to the middle of the transmission shaft (2031) via bolts, and the adjustment plate (2034) is also slidably mounted on the polygonal rod (2038); The motor (2037) is mounted on the bottom wall of the arc-shaped cover (201), and the output shaft of the motor (2037) is fixedly connected to a first gear (2036), one side of the first gear (2036) is meshed with a second gear (2035), and the second gear (2035) is fixedly connected to the transmission shaft (2031).

6. The non-metallic tensile testing tool for internal blowout prevention tools according to claim 5, characterized in that: The test assembly (204) includes an assembly plate (2041), the first piston rod (2052) above corresponds to the position of one of the assembly plates (2041) above, wherein the two assembly plates (2041) below are fixed below the transmission shaft (2031), the lower part of the protective plate (2032) is fixed to the lower assembly plate (2041), and the lower assembly plate (2041) is fixedly connected to the bottom end of the polygonal rod (2038), the upper assembly plate (2041) is mounted above the adjustment plate (2034), and the two docking rails (208) are respectively fixedly connected above the two assembly plates (2041) above, and the polygonal sleeve (2039) is installed on the upper assembly plate (2041); A tester (2042) is mounted on the assembly plate (2041), one end of the tester (2042) is fixedly connected to a clamping plate (2043), a pressure plate (2044) is provided in the clamping plate (2043), one side of the pressure plate (2044) is fixedly connected to a threaded barrel (2045), the internal thread of the threaded barrel (2045) is connected to a stud (2046), the stud (2046) is rotatably mounted on the clamping plate (2043) via a bearing, and one end of the stud (2046) is fixedly connected to a third gear (2047).

7. The non-metallic tensile testing tool for internal blowout prevention tools according to claim 6, characterized in that: The limiting assembly (207) comprises an upper cylinder (2071) and a side cylinder (2076), wherein the upper cylinder (2071) and the side cylinder (2076) are respectively mounted on an assembly plate (2041) and a tester (2042), wherein the side cylinder (2076) is connected to the upper cylinder (2071) via a pipe (2075), and a third piston rod (2077) is provided inside the side cylinder (2076), wherein the third piston rod (2077) passes downwardly out of the side cylinder (2076) and is fixedly connected to a latch plate (2078), and the latch plate (2078) is engaged with a third gear (2047).

8. The non-metallic tensile testing tool for internal blowout prevention tools according to claim 7, characterized in that: An upper second piston rod (2072) is provided inside the upper cylinder (2071), and a fourth spring (2074) is fixedly connected between one side of the upper second piston rod (2072) and the side wall of the upper cylinder (2071). The upper second piston rod (2072) passes through the upper cylinder (2071) and is fixedly connected to the rolling ball (2073). The rolling ball (2073) is slidably provided on the inner wall of the arc cover (201), and both side edges in front of the arc cover (201) are set as arc surfaces.

9. The test method of the tensile test fixture for non-metallic parts of an internal blowout prevention tool according to claim 8, characterized in that: The following steps are involved: S1. When performing a tensile test, the sample is placed between two clamping plates (2043) and the threaded barrel (2045) is pushed forward by rotating the stud (2046), so that the threaded barrel (2045) drives the pressure plate (2044) to clamp the sample on the clamping plates (2043). After clamping, the first gear (2036) and the second gear (2035) are driven by the motor (2037), the second gear (2035) drives the transmission shaft (2031) to rotate, and the transmission shaft (2031) drives the test assembly ( 204) and the limiting assembly (207) rotate, and when the ball (2073) in the limiting assembly (207) passes through the arc-shaped side of the arc cover (201), the ball (2073) is squeezed and drives the upper second piston rod (2072) to move, and the upper second piston rod (2072) pushes the liquid into the side tube (2076) through the pipe (2075), so that the hydraulic pressure drives the third piston rod (2077) to drive the tooth plate (2078) downward to engage with the third gear (2047), so that the position of the stud (2046) is locked; S2. After the two test assemblies (204) are rotated and repositioned, the clamped specimen is at the rear, and at the same time, the test assembly (204) drives the docking rail (208) to engage with the docking block (2022). At this time, the test device (100) performs a stretching movement upward, so that the tester (2042) performs a stretching length test on the specimen through the clamping plate (2043). The tester (2042) records the data and transmits it to the test device (100); S3, placing the sample to be cut above the drawer (2063), and then pushing the drawer (2063) to the bottom of the housing (2064), so that the top block (20610) positions the sample through the third spring (2069); S4. When the upper assembly plate (2041) moves upward to squeeze the first piston rod (2052), the first piston rod (2052) drives another first piston rod (2052) through hydraulic pressure to drive the driving plate (2055) to move downward. The driving plate (2055) applies pressure to the movable table (2066), causing the cutting knife (2068) to cut the sample downward. After cutting, the sample is in a dumbbell shape. The cut sample is then taken out and clamped on the clamping plate (2043) again. S5. After the sample is clamped again, the positions of the two test assemblies (204) are swapped, and the broken or deformed sample is removed, and the sample tensile test is performed again in the arc cover (201).

Images