Impact resistance test device for push rod

Abstract

The utility model discloses a push rod impact resistance test device, which comprises a test cylinder made of a metal material, the outer wall of the test cylinder is provided with a low-voltage electrode connecting end, the test cylinder is internally provided with a water injection cavity, the upper part of the side wall of the test cylinder is provided with a working hole, and the right end of the test cylinder is provided with an electrode hole. A push rod placing hole is formed in the left end of the test barrel; the insulator is installed in the electrode hole, the high-voltage electrode is installed in the center of the insulator, and the output end and the connecting end of the high-voltage electrode are located on the inner side and the outer side of the test cylinder respectively; the pushing end of the pushing rod penetrates through the pushing rod containing hole and then extends into the water injection cavity, the load is located in the water injection cavity, and the two ends of the load abut against the pushing end of the pushing rod and the output end of the high-voltage electrode respectively. The dowel bar and the push bar are coaxially arranged, the dowel bar comprises a plurality of test bars, and the sensor is arranged between two adjacent test bars. The problem that no impact resistance test device suitable for the push rod exists in the prior art is solved.

Description

Technical Field

[0001] The present application belongs to the field of shock wave technology, and in particular relates to a push rod anti-shock test device. Background Art

[0002] Controllable shock wave technology is a new underwater shock wave generation method. Compared with traditional chemical explosions and electromechanical explosions, it has the advantages of high efficiency, controllable shock intensity, and controllable working times. It has good application prospects in coal seam gas control, oil field unblocking, shale gas mining, and mining. The key to achieving the working times of the controllable shock wave generating device is that the pushing mechanism can stably and repeatedly push the energetic rod load. Therefore, the reliability of the pushing rod directly affects the stability and working efficiency of the controllable shock wave generating device.

[0003] The commutator of the push mechanism moves the push rod, which pushes the load into the energy converter to generate a shock wave. The generated shock wave will cause the push rod to be damaged by the strong shock wave, and cause damage to the drive motor. The impact resistance of the push rod determines the upper limit of the amplitude of the single output shock wave of the controllable shock wave generating device and the service life of the push rod and the drive motor. Therefore, it is necessary to test the impact resistance of the push rod to obtain the specific impact resistance of the push rod. However, there is currently no impact resistance test device suitable for the push rod, so it cannot meet the use requirements of the current controllable shock wave generating device. Utility Model Content

[0004] The embodiment of the present application solves the problem that there is no impact resistance test device suitable for a push rod in the prior art by providing a push rod impact resistance test device.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a push rod impact resistance test device, including a test cylinder, an insulator, a high-voltage electrode, a load, a force transmission rod and a sensor;

[0006] The test cylinder is made of metal, the outer wall of the test cylinder is provided with a low-voltage electrode connection end, the interior of the test cylinder is provided with a water injection cavity, the upper part of the side wall of the test cylinder is provided with a working hole, the right end of the test cylinder is provided with an electrode hole, and the left end of the test cylinder is provided with a push rod placement hole;

[0007] The insulator is installed in the electrode hole, the high-voltage electrode is installed in the center of the insulator, and the output end and the connection end of the high-voltage electrode are respectively located at the inner and outer sides of the test cylinder;

[0008] The pushing end of the pushing rod passes through the pushing rod placement hole and then extends into the water injection cavity, the load is located in the water injection cavity, and two ends of the load are respectively abutted against the pushing end of the pushing rod and the output end of the high-voltage electrode;

[0009] The force transmission rod and the pushing rod are coaxially arranged, the force transmission rod comprises a plurality of test rods, and the sensor is arranged between two adjacent test rods.

[0010] In a possible implementation, the test cylinder is a cylindrical structure, the water injection cavity is a cylindrical structure, and the electrode hole, the push rod placement hole, the water injection cavity and the test cylinder are coaxially arranged.

[0011] In a possible implementation, it also includes a power supply, a pulse capacitor and a gas spark switch;

[0012] The two output ends of the power supply are respectively connected to the two input ends of the pulse capacitor, the two output ends of the pulse capacitor are respectively connected to the connection end of the high-voltage electrode and one end of the gas spark switch, and the other end of the gas spark switch is connected to the low-voltage electrode connection end.

[0013] In a possible implementation, the sensor is a PVDF pressure sensor;

[0014] An aluminum foil leveling layer is arranged around the sensor, the sensor and the aluminum foil leveling layer are both arranged on the aluminum foil fixing layer, and the sensor, the aluminum foil leveling layer and the aluminum foil fixing layer are arranged between two adjacent test rods.

[0015] In a possible implementation, the sensor has a compression of 20 um.

[0016] In a possible implementation, ends of two adjacent test rods are each provided with a docking ring, and the two docking rings are connected by bolts, nuts, and spring washers.

[0017] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0018] The embodiment of the utility model provides a push rod impact resistance test device. When the device is used, the connection end of the high-voltage electrode and the connection end of the low-voltage electrode are respectively connected to the two output ends of the pulse discharge circuit, water is added to the water injection chamber for silencing, and the pulse discharge circuit discharges to the connection end of the high-voltage electrode and the connection end of the low-voltage electrode, so that the load generates a shock wave, and the shock wave acts on the push rod. The sensor detects the size of the shock wave transmitted from the push rod to the test rod, thereby realizing the test of the impact resistance of the push rod. The utility model can test the shock wave unloading capacity of the shock wave unloading section at the front end of the push rod, thereby obtaining a better structure of the shock wave unloading section, thereby ensuring the use requirements of the controllable shock wave generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of a push rod impact resistance test device provided in an embodiment of the utility model.

[0021] Figure 2 A cross-sectional view of a push rod impact resistance test device provided in an embodiment of the utility model.

[0022] Figure 3 for Figure 2 Enlarged view of point A.

[0023] Figure numerals: 1-test cylinder; 11-low-voltage electrode connection end; 12-water injection chamber; 13-working hole; 14-electrode hole; 15-push rod placement hole; 2-insulator; 3-high-voltage electrode; 4-push rod; 5-load; 6-force transmission rod; 61-test rod; 62-docking ring; 7-aluminum foil leveling layer; 8-aluminum foil fixing layer; 9-gas spark switch; 10-pulse capacitor; 20-sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the embodiments of the present utility model, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to the specific circumstances.

[0026] like Figures 1 to 3 As shown, the push rod impact resistance test device provided by the embodiment of the utility model includes a test cylinder 1, an insulator 2, a high-voltage electrode 3, a load 5, a sensor 20 and a force transmission rod 6.

[0027] The test cylinder 1 is made of metal, and a low-voltage electrode connection terminal 11 is provided on the outer wall of the test cylinder 1, a water injection cavity 12 is provided inside the test cylinder 1, a working hole 13 is provided on the upper part of the side wall of the test cylinder 1, an electrode hole 14 is provided at the right end of the test cylinder 1, and a push rod placement hole 15 is provided at the left end of the test cylinder 1.

[0028] The insulator 2 is installed in the electrode hole 14 , the high-voltage electrode 3 is installed in the center of the insulator 2 , and the output end and the connection end of the high-voltage electrode 3 are respectively located at the inner and outer sides of the test cylinder 1 .

[0029] The pushing end of the pushing rod 4 passes through the pushing rod placement hole 15 and extends into the water injection cavity 12. The load 5 is located in the water injection cavity 12. The two ends of the load 5 are respectively in contact with the pushing end of the pushing rod 4 and the output end of the high-voltage electrode 3.

[0030] The force transmission rod 6 and the pushing rod 4 are coaxially arranged. The force transmission rod 6 includes a plurality of test rods 61 . The sensor 20 is arranged between two adjacent test rods 61 .

[0031] It should be noted that the load 5 uses a small energy storage, about 10kJ of metal wire as the excitation source, the metal wire is a copper wire, and the metal wire needs to use a glass shell as a load 5 fixer. The utility model uses an organic glass shell containing an energy rod as a stabilizer for the load 5 to ensure the repeatability and easy installation of the load 5. During the experiment, the load 5 is clamped and fixed between the push rod 4 and the high-voltage electrode 3 by pushing the push rod 4. During installation, it is necessary to ensure that the load 5 and the push rod 4 are placed coaxially as much as possible to ensure that the push rod 4 is in the positive axial direction to face the explosion. The utility model can generate the set impact force, and there is no need to strictly follow the structure of using a metal wire underwater electric explosion or an energetic rod electric explosion in actual use. Compared with the actual impact strength, the utility model has a lower impact strength, and the structure of the push rod 4 will not produce a large deformation, so the lateral effect of the pressure gauge is ignored during the installation of the sensor 20.

[0032] The test cylinder 1 is used as a conductor connecting the low-voltage electrode connection terminal 11 and the load 5, and the insulator 2 is used for insulation between the test cylinder 1 and the high-voltage electrode 3. The push rod 4 and the test cylinder 1 are movably installed, and a sealing ring is provided between the push rod 4 and the left end of the push rod placement hole 15 to prevent water leakage. In order to prevent stress concentration in the sensor 20, the surrounding area of ​​the device needs to be leveled.

[0033] When the device is in use, the connection end of the high-voltage electrode 3 and the connection end of the low-voltage electrode 11 are respectively connected to the two output ends of the pulse discharge circuit, water is added to the water injection chamber 12 for silencing, and the pulse discharge circuit discharges to the connection end of the high-voltage electrode 3 and the connection end of the low-voltage electrode 11, so that the load 5 generates a shock wave, and the shock wave acts on the push rod 4. The sensor 20 detects the size of the shock wave transmitted from the push rod 4 to the test rod 61, thereby realizing the test of the impact resistance of the push rod 4. The utility model can test the shock wave unloading capacity of the shock wave unloading section at the front end of the push rod 4, thereby obtaining a better structure of the shock wave unloading section, thereby ensuring the use requirements of the controllable shock wave generating device.

[0034] In this embodiment, the test cylinder 1 is a columnar structure, the water injection cavity 12 is a columnar structure, and the electrode hole 14, the push rod placement hole 15, the water injection cavity 12 and the test cylinder 1 are coaxially arranged. Such a structural form can more accurately simulate the actual use of the push rod 4.

[0035] In this embodiment, a power supply, a pulse capacitor 10 and a gas spark switch 9 are also included.

[0036] The two output ends of the power supply are respectively connected to the two input ends of the pulse capacitor 10, and the two output ends of the pulse capacitor 10 are respectively connected to the connection end of the high-voltage electrode 3 and one end of the gas spark switch 9, and the other end of the gas spark switch 9 is connected to the low-voltage electrode connection end 11.

[0037] It should be noted that during the experiment, a 10kW manual boost pulse power supply was used to charge the 30uF pulse capacitor 10, and the discharge voltage was controlled by controlling the gas pressure inside the two-electrode gas spark switch 9. The discharge voltage was set to 25.2kV. The pulse discharge circuit of the utility model has high reliability and is easy to operate.

[0038] In this embodiment, the sensor 20 is a PVDF pressure sensor.

[0039] An aluminum foil leveling layer 7 is disposed circumferentially of the sensor 20 . The sensor 20 and the aluminum foil leveling layer 7 are both disposed on an aluminum foil fixing layer 8 . The sensor 20 , the aluminum foil leveling layer 7 and the aluminum foil fixing layer 8 are disposed between two adjacent test rods 61 .

[0040] In this embodiment, the sensor 20 has a compression amount of 20 um.

[0041] It should be noted that the overall thickness of the sensor 20 is about 300um, and the thickness of a single layer of aluminum foil is 40um. Therefore, seven layers of aluminum foil are stacked as the aluminum foil leveling layer 7 to ensure that the sensor 20 is in a lightly compressed state in the initial state, so that the sensor 20 is stably clamped in the test rod 61 to prevent stress concentration. A layer of aluminum foil fixing layer 8 is used on the sensor 20 and the aluminum foil leveling layer 7 for fixing to facilitate the installation of the sensor 20.

[0042] In this embodiment, the signal output line of the sensor 20 is arranged in the waterproof insulating film, and the end of the signal transmission line is connected to the signal input line through the adapter terminal.

[0043] In this embodiment, the ends of two adjacent test rods 61 are each provided with a docking ring 62 , and the two docking rings 62 are connected by bolts, nuts and spring washers.

[0044] It should be noted that the connection method of the two test rods 61 is highly reliable, and the protrusion at the end of one test rod 61 is located in the groove at the end of the other test rod 61. The sensor 20, the aluminum foil leveling layer 7 and the aluminum foil fixing layer 8 are arranged between the protrusion and the groove, so that the two adjacent test rods 61 can maintain a coaxial state, and the sensor 20, the aluminum foil leveling layer 7 and the aluminum foil fixing layer 8 are easy to fit together.

[0045] In this embodiment, it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiment, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiment should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A push rod impact test device, characterized in that: It comprises a test cylinder (1), an insulator (2), a high-voltage electrode (3), a load (5), a force transmission rod (6) and a sensor (20); The test cylinder (1) is made of metal, the outer wall of the test cylinder (1) is provided with a low-voltage electrode connection end (11), the interior of the test cylinder (1) is provided with a water injection cavity (12), the upper part of the side wall of the test cylinder (1) is provided with a working hole (13), the right end of the test cylinder (1) is provided with an electrode hole (14), and the left end of the test cylinder (1) is provided with a push rod placement hole (15); The insulator (2) is installed in the electrode hole (14), the high-voltage electrode (3) is installed at the center of the insulator (2), and the output end and the connection end of the high-voltage electrode (3) are respectively located at the inner and outer sides of the test cylinder (1); The pushing end of the pushing rod (4) passes through the pushing rod placement hole (15) and then extends into the water injection chamber (12), the load (5) is located in the water injection chamber (12), and the two ends of the load (5) are respectively abutted against the pushing end of the pushing rod (4) and the output end of the high-voltage electrode (3); The force transmission rod (6) and the pushing rod (4) are coaxially arranged, the force transmission rod (6) comprises a plurality of test rods (61), and the sensor (20) is arranged between two adjacent test rods (61).

2. The push rod impact resistance test device according to claim 1, characterized in that: The test cylinder (1) is a columnar structure, the water injection chamber (12) is a columnar structure, and the electrode hole (14), the push rod placement hole (15), the water injection chamber (12) and the test cylinder (1) are coaxially arranged.

3. The push rod impact resistance test device according to claim 1, characterized in that: It also includes a power supply, a pulse capacitor (10) and a gas spark switch (9); The two output ends of the power supply are respectively connected to the two input ends of the pulse capacitor (10), the two output ends of the pulse capacitor (10) are respectively connected to the connection end of the high-voltage electrode (3) and one end of the gas spark switch (9), and the other end of the gas spark switch (9) is connected to the low-voltage electrode connection end (11).

4. The push rod impact resistance test device according to claim 1, characterized in that: The sensor (20) is a PVDF pressure sensor; An aluminum foil leveling layer (7) is arranged in the circumferential direction of the sensor (20); the sensor (20) and the aluminum foil leveling layer (7) are both arranged on an aluminum foil fixing layer (8); and the sensor (20), the aluminum foil leveling layer (7) and the aluminum foil fixing layer (8) are arranged between two adjacent test rods (61).

5. The push rod impact resistance test device according to claim 4, characterized in that: The sensor (20) has a compression of 20 um.

6. The push rod impact resistance test device according to claim 1, characterized in that: The ends of two adjacent test rods (61) are each provided with a docking ring (62), and the two docking rings (62) are connected by bolts, nuts and spring washers.

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