CN218444948U - Secondary impact preventing device for drop hammer impact test - Google Patents

Abstract

The utility model relates to a secondary impact device is prevented in drop hammer impact test, belong to the check out test set field, drop hammer impact test prevents that secondary impact device sets up on drop hammer impact test machine, drop hammer impact test machine includes the support, the support top is fixed with the lifting machine, be connected with first electro-magnet on the lifting rope of lifting machine, adsorb on the first electro-magnet and have the drop hammer, the support includes the sample cushion cap, first electro-magnet is connected with a first controller, drop hammer impact test prevents that secondary impact device sets up on the support, and be located sample cushion cap top, drop hammer impact test prevents that secondary impact device is including the ring stand that can make the drop hammer therefrom pass, the ring stand is under the drop hammer, the inboard ring of ring stand is equipped with a plurality of second electro-magnets, the second electro-magnet all is connected with first controller, first controller control first electro-magnet outage and through predetermineeing the time after, control second electro-magnet circular telegram. The method and the device have the effect of improving the detection precision.

Description

Secondary impact preventing device for drop hammer impact test

Technical Field

The application relates to the field of test equipment, in particular to a secondary impact prevention device for a drop hammer impact test.

Background

In the process of detecting the impact resistance of certain products, the drop weight impact testing machine is a testing device for detecting the impact resistance of the products.

The drop hammer impact testing machine mainly comprises a support, a drop hammer and a lifting mechanism, wherein a sample is horizontally placed below the drop hammer, the lifting mechanism lifts the drop hammer to a certain height, then the drop hammer is released to move in a free falling body mode and is hit on the sample, and a test result is observed after impact is finished.

However, when the drop hammer falls on the surface of the first-time striking sample, the drop hammer may bounce and fall again to form two or more striking samples, which is not favorable for obtaining accurate impact results and reduces detection precision.

Disclosure of Invention

In order to improve and detect the precision, this application provides a secondary impact device is prevented in drop hammer impact test.

The application provides a pair of secondary impact device is prevented in drop hammer impact test adopts following technical scheme:

the utility model provides a device is prevented secondary impact by drop hammer impact test, the device setting is prevented secondary impact by drop hammer impact test on drop hammer impact test, drop hammer impact test includes the support, the support top is fixed with the lifting machine, be connected with first electro-magnet on the lifting rope of lifting machine, it has the drop hammer to adsorb on the first electro-magnet, the support includes the sample cushion cap, first electro-magnet is connected with a first controller, drop hammer impact test prevents secondary impact device setting and is in on the support, and be located sample cushion cap top, drop hammer impact test prevents secondary impact device including making the ring frame that the drop hammer from the process of passing, the ring frame is located under the drop hammer, the ring is equipped with a plurality of second electro-magnets in the ring frame, the second electro-magnet all with first controller is connected, first controller control first electro-magnet outage just through predetermineeing the time after, control the second electro-magnet circular telegram.

Through adopting above-mentioned technical scheme, place the sample on the sample cushion cap, when beginning the experiment, the first electro-magnet outage of first controller control, drop hammer passes and falls on the sample from ring frame central authorities, and first controller is through presetting the time back, and the circular telegram of control second electro-magnet, the drop hammer that the second electro-magnet adsorbs the bounce prevents that the drop hammer secondary from falling on the sample, improves and detects the precision.

Optionally, a distance measuring sensor is arranged below the sample bearing platform and located under the drop hammer, and the distance measuring sensor is connected with the first controller.

Through adopting above-mentioned technical scheme, distance sensor detects the distance between sample and the distance sensor before and after the impact test to with two data transmission to first controller, first controller can calculate and obtain the deformation volume, do benefit to intelligence and calculate, improve detection efficiency.

Optionally, the sample cushion cap is a rectangular frame, the support includes four lower supports fixed on the outer side of the sample cushion cap, an upper frame, four upper supports fixed on the outer side of the upper frame, and a support frame inserted between the upper supports and the lower supports, and the lower supports and the upper supports are all in threaded connection with screws abutting against the support frame.

Through adopting above-mentioned technical scheme, the support is formed by roof-rack, sample cushion cap and support frame equipment, is convenient for install and dismantle.

Optionally, the two lower supports are in a group and are respectively fixed on a group of opposite frame bodies of the sample bearing platform.

By adopting the technical scheme, a longer sample can be placed on the sample bearing platform from between the two groups of lower supports.

Optionally, the lifting machine is connected with a second controller, a stopper is arranged on the lifting machine, the stopper is connected with the second controller, and a lifting rope of the lifting machine penetrates through the stopper.

Through adopting above-mentioned technical scheme, when the height of hammer that falls is adjusted to lifting machine rolling lifting rope, first electro-magnet touching stopper, the stopper sends the signal of telecommunication to the second controller, and the second controller control lifting machine stops the rolling lifting rope, realizes automatically regulated.

Optionally, the ring frame is a rectangular frame, hooks are fixed to the back of the second electromagnets, the hooks are hung on the side walls of the ring frame from top to bottom, at least one second electromagnet is arranged on each side wall of the ring frame, and the second electromagnets are connected end to end.

Through adopting above-mentioned technical scheme, the joint of second electro-magnet is on the ring frame, and the installation of being convenient for is dismantled to ensure that the hammer bullet that falls is adsorbed by the second electro-magnet to any one direction.

Optionally, one of them the cover is equipped with the mounting on the support frame, the mounting includes a lower section of thick bamboo, threaded connection has an upper cylinder on the lower section of thick bamboo, be fixed with the connecting rod on the upper cylinder outer wall, the ring frame sets up the connecting rod is kept away from the one end of an upper cylinder, support one side is provided with electric push rod, electric push rod with it is fixed to lower section of thick bamboo, electric push rod with first controller is connected.

Through adopting above-mentioned technical scheme, the output extension or the shortening of electric push rod can make the mounting slide from top to bottom along the support frame, and a section of thick bamboo is gone up in the relative rotation, can change the ring frame in the position of sample cushion cap top, the accurate regulation of being convenient for, can follow the ring frame central authorities and pass after making the drop hammer fall.

Optionally, the ring frame is hinged to the connecting rod.

Through adopting above-mentioned technical scheme, ring frame and connecting rod relative rotation can finely tune the position of ring frame, adjusts the ring frame more accurately.

Optionally, the connecting rod is a telescopic rod.

Through adopting above-mentioned technical scheme, the length of regulation connecting rod is convenient for more accurately according to the position of weight, the position of regulation ring frame.

Optionally, a laser is fixed on one side of the first electromagnet, an output end of the laser is vertically downward, and the laser is connected with the first controller.

By adopting the technical scheme, when the first controller controls the laser to be started, the laser generates a laser point under the laser, so that a worker can conveniently determine the position of the ring frame and the position of the distance measuring sensor according to the laser point.

In summary, the present application includes at least one of the following beneficial technical effects:

1. placing a sample on a sample bearing platform, when a test is started, controlling a first electromagnet to be powered off by a first controller, enabling a drop hammer to pass through the center of a ring frame and fall on the sample, controlling a second electromagnet to be powered on by the first controller after a preset time, adsorbing the bounced drop hammer by the second electromagnet, preventing the drop hammer from falling on the sample for the second time, and improving the detection precision;

2. the output end of the electric push rod is extended or shortened, so that the fixing piece can slide up and down along the support frame, the upper barrel is rotated relatively, the position of the ring frame above the sample bearing platform can be changed, accurate adjustment is facilitated, and the drop hammer can penetrate through the center of the ring frame after falling;

3. when the first controller controls the laser to start, the laser generates a laser point under the laser, so that a worker can determine the position of the ring frame and the position of the distance measuring sensor according to the laser point.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a block diagram of the present application.

Figure 3 is an exploded view of a ring frame and a second electromagnet attachment embodying the present application.

Description of reference numerals: 1. a support; 11. a top frame; 12. a cross beam; 13. an upper support; 14. a sample cushion cap; 15. a lower support; 16. a support frame; 17. a screw; 2. a hoist; 3. a second controller; 4. a first electromagnet; 5. a stopper; 6. a control panel; 7. a first controller; 8. preparing a key; 9. starting to press a key; 10. a ranging sensor; 18. dropping a hammer; 19. a display screen; 20. a secondary impact prevention device for a drop hammer impact test; 201. a fixing member; 2011. feeding the cylinder; 2012. a lower barrel; 202. a connecting rod; 203. a ring frame; 204. a second electromagnet; 2041. hooking; 205. an electric push rod; 21. an up key; 22. a down bond; 23. a laser; 24. the keys are calibrated.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses secondary impact device is prevented in drop hammer impact test. Referring to fig. 1, the secondary impact prevention device 20 for the drop hammer impact test is arranged on a drop hammer impact test machine, the drop hammer impact test machine comprises a support 1, the support 1 comprises a top frame 11, the top frame 11 is a rectangular frame, and a cross beam 12 is fixed in the center of the top frame 11.

Four upper supports 13 are fixed on the outer side of the top frame 11, and the upper supports 13 are cylindrical. The support 1 further comprises a sample bearing platform 14, the sample bearing platform 14 is a rectangular frame, four lower supports 15 are fixed on the outer side of the sample bearing platform 14, and the lower supports 15 are cylindrical. The sample that is being tested is placed on sample cushion cap 14, and in order to place longer sample in the ease, two liang of a set of undersetting 15 are fixed respectively on a set of relative support body of sample cushion cap 14, make the sample can place on sample cushion cap 14 from between two sets of undersetting 15.

The support 1 further comprises a support frame 16 installed between the upper support 13 and the lower support 15, the support frame 16 is a cylindrical steel pipe, the pipe diameter of the support frame 16 is smaller than that of the upper support 13 and that of the lower support 15, the top end of the support frame 16 is inserted into the upper support 13, and the bottom end of the support frame is inserted into the lower support 15. In order to fasten the connection between the support frame 16 and the upper support 13 and the lower support 15, the upper support 13 and the lower support 15 are both in threaded connection with a screw 17 penetrating to the inside, and after the support frame 16 is inserted into the upper support 13 and the lower support 15, the screw 17 is screwed, and the screw 17 abuts against the support frame 16. In order to stably connect the supporting frame 16 between the upper support 13 and the lower support 15, the upper supports 13 are grouped in pairs and are respectively fixed on a group of opposite frame bodies of the top frame 11.

Referring to fig. 1 and 2, a hoist 2 is fixed on a cross beam 12, the hoist 2 is connected with a second controller 3, a first electromagnet 4 is fixed on a lifting rope of the hoist 2, a drop hammer 18 is adsorbed on the first electromagnet 4, and a protective sleeve is fixed at the bottom end of the drop hammer 18.

The crossbeam 12 is also fixed with a stopper 5 positioned below the elevator 2, the lifting rope passes through the stopper 5, the stopper 5 is lapped on the top of the first electromagnet 4, and the stopper 5 is connected with the second controller 3. When the lifting rope is rolled up by the lifting machine 2, the first electromagnet 4 touches the stopper 5, and the second controller 3 controls the lifting machine 2 to stop. The worker can adjust the position of the stopper 5 according to the height required to be lowered by the drop hammer 18 in the impact test.

The drop hammer impact tester also comprises a control panel 6, wherein a first controller 7 is arranged in the control panel 6, a preparation key 8 and a start key 9 are arranged on the control panel 6, and the first controller 7 is connected with the preparation key 8 and the start key 9. When a drop hammer 18 impact test is carried out, a worker presses the preparation button 8, the first controller 7 sends a signal to the second controller 3, the second controller 3 controls the hoisting machine 2 to wind a lifting rope, and after the first electromagnet 4 touches the limiting stopper 5, the second controller 3 controls the hoisting machine 2 to stop acting. Next, the worker presses the start button 9, the first controller 7 controls the first electromagnet 4 to be powered off, and the drop weight 18 falls and impacts the surface of the sample.

In order to detect the deformation amount of the sample after the impact, a distance measuring sensor 10 is placed on the ground under the sample stage 14, and the distance measuring sensor 10 is connected to the first controller 7. When the worker presses the preparation key 8, the first controller 7 receives a first distance electric signal sent by the distance measuring sensor 10, thereby obtaining first distance information; when the worker presses the start button 9 for a predetermined time, at which the drop weight 18 has impacted on the sample, the first controller 7 receives the second distance electric signal transmitted from the distance measuring sensor 10, thereby obtaining second distance information.

The first controller 7 calculates the difference between the first distance electric signal and the second distance electric signal, and the deformation amount of the sample is obtained. In order to make the working personnel know the deformation quantity, the controller is connected with a display screen 19, the display screen 19 is arranged on the control panel 6, and after the impact test is completed, the deformation quantity is displayed on the display screen 19 by the first controller 7.

In order to prevent secondary impact, the secondary impact preventing device 2020 for drop hammer impact test is arranged on the bracket 1 and comprises a fixing part 201, the fixing part 201 comprises an upper barrel 2011 and a lower barrel 2012 which are cylindrical, and the upper barrel 2011 and the lower barrel 2012 are coaxially sleeved on one of the supporting frames 16. The outer wall of the top end of the lower barrel 2012 is provided with an external thread, the lower end of the lower barrel 2012 is provided with an internal thread, and the upper barrel 2011 is in threaded connection with the lower barrel 2012.

Be fixed with connecting rod 202 on last section of thick bamboo 2011 outer wall, connecting rod 202 is the telescopic link, and the one end of keeping away from last section of thick bamboo 2011 at connecting rod 202 articulates there is the ring frame 203, and the vertical setting of articulated shaft, when the in-service use, the tightening articulated shaft, under the vertical and no external force's of articulated shaft condition, position relatively stable between ring frame 203 and connecting rod 202.

Referring to fig. 1 and 3, the ring frame 203 is a rectangular frame, at least one second electromagnet 204 is installed on each side wall of the ring frame 203, the surface of the second electromagnet 204 is a plane, a hook 2041 is fixed on the back of the second electromagnet 204, the hook 2041 is hung on the ring frame 203 from top to bottom, and the second electromagnets 204 are connected end to end.

Referring to fig. 1 and 2, the second electromagnet 204 is connected to the first controller 7, after the drop hammer 18 falls, the drop hammer 18 can pass through the center of the ring frame 203, when the first controller 7 controls the first electromagnet 4 to be powered off for a preset time, the first controller 7 controls the second electromagnet 204 to be powered on, and when the second electromagnet 204 is powered on, the popped drop hammer 18 is adsorbed, so that the drop hammer 18 is prevented from impacting a sample for the second time, and the detection precision is improved. Wherein, the time required for the falling weight 18 to fall on the sample is calculated according to the distance between the falling weight 18 and the sample and the free falling body movement calculation formula, and the preset time is equal to the calculated time.

In order to adjust the height between the ring holder 203 and the sample platform 14, a worker may perform a plurality of experiments in advance to determine the height of the ring holder 203 and ensure that the drop weight 18 can be adsorbed by the second electromagnet 204. In order to adjust the height of the ring frame 203, an electric push rod 205 is arranged on one side of the bracket 1, the output end of the electric push rod 205 is fixed with the lower barrel 2012, the electric push rod 205 is connected with a first controller 7, the first controller 7 is connected with an ascending key 21 and a descending key 22, and the ascending key 21 and the descending key 22 are arranged on the control panel 6. When the height of the ring frame 203 needs to be adjusted, the worker controls the electric push rod 205 through the ascending key 21 and the descending key 22.

Thus, the worker may adjust the position of the ring stand 203 above the sample stage 14.

In order to facilitate the ring frame 203 to be positioned right below the drop hammer 18, a laser 23 is arranged on one side of the first electromagnet 4, the laser 23 can emit a laser spot vertically downwards, the laser 23 is connected with the first controller 7, and the first controller 7 is connected with a calibration key 24. When the position of the ring holder 203 is adjusted, the calibration button 24 is pressed, the first controller 7 starts the laser 23, and the worker adjusts the position of the ring holder 203 by adjusting the length of the connecting rod 202 and rotating the ring holder 203 according to the laser point of the laser 23.

Meanwhile, the worker may calibrate the position of the distance measuring sensor 10 according to the position of the laser spot so that the distance measuring sensor 10 is located right under the drop weight 18.

The implementation principle of the secondary impact device is prevented in this application embodiment of a drop hammer impact test is:

before the test, the top frame 11, the supporting frame 16 and the sample bearing platform 14 are assembled into the support 1, a worker presses the calibration key 24, the first controller 7 controls the laser 23 to light up, the worker adjusts the length of the connecting rod 202 according to the position of the laser point, the ring frame 203 is rotated to enable the ring frame 203 to be located under the drop hammer 18, and meanwhile, the distance measuring sensor 10 is erected to enable the distance measuring sensor 10 to be close to the laser point.

The sample is placed on the sample bearing platform 14, the worker presses the preparation button 8, the second controller 3 winds the lifting rope, the first electromagnet 4 touches the limiting stopper 5, and the second controller 3 controls the lifting machine 2 to stop.

When the worker presses the start button 9, the first controller 7 controls the first electromagnet 4 to be powered off, the drop hammer 18 descends to hammer on the sample, after the preset time, the first controller 7 controls the second electromagnet 204 to be powered on, and the rebounded drop hammer 18 is adsorbed on the second electromagnet 204.

The first controller 7 acquires the first distance electric signal and the second distance electric signal detected by the distance measuring sensor 10, and displays the calculated amount of deformation on the display screen 19.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a secondary impact device is prevented in drop hammer impact test, drop hammer impact test prevents that secondary impact device (20) sets up on drop hammer impact test machine, drop hammer impact test machine includes support (1), support (1) top is fixed with lifting machine (2), be connected with first electro-magnet (4) on the lifting rope of lifting machine (2), it has drop hammer (18) to adsorb on first electro-magnet (4), support (1) includes sample cushion cap (14), first electro-magnet (4) are connected its characterized in that with a first controller (7): drop hammer impact test and prevent secondary impact device (20) and set up on support (1), and be located sample cushion cap (14) top, drop hammer impact test prevents secondary impact device (20) including making drop hammer (18) ring frame (203) that follow passed, ring frame (203) are located under drop hammer (18), ring frame (203) inboard ring is equipped with a plurality of second electro-magnets (204), second electro-magnet (204) all with first controller (7) are connected, first controller (7) control first electro-magnet (4) outage and through after presetting the time, control second electro-magnet (204) circular telegram.

2. The secondary impact prevention device for the drop hammer impact test according to claim 1, wherein: a distance measuring sensor (10) is arranged below the sample bearing platform (14), the distance measuring sensor (10) is located under the drop hammer (18), and the distance measuring sensor (10) is connected with the first controller (7).

3. The secondary impact prevention device for the drop hammer impact test according to claim 1, wherein: the sample bearing platform (14) is a rectangular frame, the support (1) comprises four lower supports (15) fixed on the outer side of the sample bearing platform (14), a top frame (11), four upper supports (13) fixed on the outer side of the top frame (11) and a support frame (16) inserted between the upper supports (13) and the lower supports (15), and the lower supports (15) and the upper supports (13) are all in threaded connection with screw rods (17) tightly abutting against the support frame (16).

4. The secondary impact prevention device for the drop hammer impact test according to claim 3, wherein: every two lower support seats (15) are in a group and are respectively fixed on a group of opposite frame bodies of the sample bearing platform (14).

5. The secondary impact prevention device for the drop hammer impact test according to claim 1, wherein: the elevator (2) is connected with a second controller (3), a limiter (5) is arranged on the elevator (2), the limiter (5) is connected with the second controller (3), and a lifting rope of the elevator (2) penetrates through the limiter (5).

6. The secondary impact prevention device for the drop hammer impact test according to claim 1, wherein: the ring frame (203) is a rectangular frame, a hook (2041) is fixed to the back of the second electromagnet (204), the hook (2041) is hung on the side wall of the ring frame (203) from top to bottom, at least one second electromagnet (204) is arranged on each side wall of the ring frame (203), and the second electromagnets (204) are connected end to end.

7. The secondary impact prevention device for the drop hammer impact test according to claim 3, wherein: one of them the cover is equipped with mounting (201) on support frame (16), mounting (201) are including a lower section of thick bamboo (2012), threaded connection has last section of thick bamboo (2011) on a lower section of thick bamboo (2012), it is fixed with connecting rod (202) on a last section of thick bamboo (2011) outer wall, ring frame (203) set up connecting rod (202) are kept away from go up the one end of a section of thick bamboo (2011), support (1) one side is provided with electric push rod (205), electric push rod (205) with a lower section of thick bamboo (2012) is fixed, electric push rod (205) with first controller (7) are connected.

8. The secondary impact prevention device for the drop hammer impact test according to claim 7, wherein: the ring frame (203) is hinged with the connecting rod (202).

9. The secondary impact prevention device for the drop hammer impact test according to claim 7, wherein: the connecting rod (202) is a telescopic rod.

10. The secondary impact prevention device for the drop hammer impact test according to claim 1, wherein: a laser (23) is fixed on one side of the first electromagnet (4), the output end of the laser (23) is vertically downward, and the laser (23) is connected with the first controller (7).

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