Intramedullary acceleration testing device

Abstract

The application is a kind of medium internal acceleration testing device. It comprises a carrier, a cover, a support assembly and a hanging sleeve assembly. The carrier is used for fixing and installing an acceleration sensor. The cover is buckled on the carrier. The support assembly comprises a base plate fixed on the top of the cover, a micro power source installed on the base plate and a plurality of lifting rods hinged to the base plate. A through slot is formed on the base plate. The micro power source can drive the plurality of lifting rods to pivot and abut against the inner wall of the hole to be finally fixed. The hanging sleeve assembly is used for being clamped by a clamp. It is connected with the base plate through a pulling assembly and can be separated from the clamp downward during the abutting process of the plurality of lifting rods and the inner wall of the hole. The acceleration sensor plays a role of isolation and protection. It will not be invaded by liquid in the medium inside. The sensitive surface of the acceleration sensor can be determined outside. The sensitive surface of the acceleration sensor points to the explosion with high stability. The filling material is not easy to deviate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of explosion test, and particularly relates to a medium internal acceleration test device. BACKGROUND

[0002] In explosion test, mainly collected are pressure, velocity, acceleration, strain, displacement and the like, for pressure information, structure wall surface pressure can be obtained through wall surface pressure sensor, and structure internal stress distribution can be obtained through ground stress sensor.

[0003] In the research on structure acceleration, basically stays on structure surface acceleration measurement, and there is little research on structure internal acceleration propagation.

[0004] At present, there is no specific sensor for measuring medium internal acceleration, if structure internal acceleration needs to be measured, a conventional acceleration sensor still needs to be used, and due to that the sensor used in the test is not a specific sensor, the following problems will occur when the sensor is embedded in the medium:

[0005] (1) The sensor will be invaded by liquid such as water and slurry in the medium, which will cause that the sensor cannot effectively measure acceleration and even be damaged;

[0006] (2) In non-model medium, the sensor sensitivity surface directionality cannot be guaranteed, in the internal of the preset cast model medium, the sensor can be fixed by using fastening materials such as iron wire before casting, but in non-model medium such as rock internal and built beam column components, the sensor cannot be observed and the final sensitivity surface directionality cannot be determined whether it is directed to the design direction, and after the sensor is placed in the hole, the subsequent backfill material is easy to cause the embedded sensor to deviate. SUMMARY

[0007] The application aims to provide a medium internal acceleration test device.

[0008] The technical solution for realizing the application is as follows: a medium internal acceleration test device, comprising a carrier for fixedly installing an acceleration sensor, a cover cylinder buckled on the carrier, a supporting assembly, a hanging sleeve assembly for clamp clamping and a pulling assembly,

[0009] The inner side wall of the cover cylinder is detachably connected with a baffle, and the carrier forms an isolation cavity in which the acceleration sensor is closed and accommodated, and the position of the acceleration sensor sensitivity surface is marked on the baffle during installation;

[0010] The support assembly comprises a base plate fixed to the top of the cover cylinder, a micro power source installed on the base plate, and a plurality of lifting rods hinged to the base plate, the side wall of the cover cylinder is provided with a plurality of side grooves for the lifting rods to extend out, and the micro power source drives the plurality of lifting rods to pivot against the inner wall of the hole to be finally fixed;

[0011] The hanger assembly is connected with the base plate through the pulling assembly and is separated downward from the clamp during the process that the lifting rods abut against the inner wall of the hole.

[0012] Further, the inner wall of the cover cylinder is provided with a ring groove at the connection with the baffle, the baffle is provided with an elastic ring outside, and the elastic ring is embedded in the ring groove to form elastic sealing.

[0013] Further, the baffle is provided with two rubber sleeves for two wires of the acceleration sensor to pass through, and the two rubber sleeve wires are perpendicular to the sensitive surface of the acceleration sensor; during installation, the two rubber sleeve wires are directed towards the explosion position, so that the sensitive surface of the acceleration sensor is directed towards the explosion position, and the two wires of the acceleration sensor are different, and the horizontal extension direction at one of the wires is used as a reference when the sensitive surface of the acceleration sensor is determined to be directed.

[0014] Further, the support assembly further comprises a worm, a worm wheel, a moving rod and a push block;

[0015] The base plate comprises a plate body, an inclined rod for fixing the micro power source, and an L-shaped rod hinged to the lifting rod, the plate body is fixed to the top of the cover cylinder and has a diameter larger than the outer diameter of the cover cylinder, and a through groove is formed in the plate body; a plurality of through holes for accommodating the moving rods are uniformly distributed in the inner wall of the plate body, and the outer end of the moving rod is provided with a push block;

[0016] The wires of the micro power source and the acceleration sensor pass out upward along the through groove; the output end of the micro power source is connected with the worm, the worm engages with a plurality of worm wheels, each worm wheel is connected with a lifting rod, and the lifting rod is hinged to the L-shaped rod of the base plate;

[0017] The lifting rod is collected under the plate body of the base plate in the initial position, the worm is driven to rotate by the micro power source, a plurality of worm wheels drive a lifting rod to pivot respectively, the lifting rod is pivoted to extend out of the base plate and contact with the inner wall of the hole, and finally the test device is fixed in the hole.

[0018] Further, a flexible belt body is arranged between the side groove of the side wall of the cover cylinder and the lifting rod, which seals the side groove and prevents the medium from entering the cover cylinder;

[0019] The end of the lifting rod is provided with a flat surface for abutting against the side wall of the hole.

[0020] Further, the hanger assembly comprises a hanger body, a straight rail and a plurality of guide rods;

[0021] The guide rod is provided with a slope matched with the end face of the moving rod, the top of the lifting sleeve body is provided with a straight rail matched with the clamp, the guide rod is movably arranged in the through slot of the pad, when the lifting sleeve assembly moves downward, the guide rod drives the moving rod to move outward, the push block is kept preliminarily fixed against the inner wall of the hole before the lifting sleeve body is separated from the clamp, and after the lifting sleeve body is separated from the clamp, the plurality of lifting rods are kept finally fixed against the inner wall of the hole, so that the test device is kept highly stable in the hole; after the lifting sleeve assembly moves downward, the through slot on the pad is buckled inside the lifting sleeve assembly.

[0022] Further, the pulling assembly comprises a movable sleeve arranged on the pad and a lining rod connected with the lifting sleeve body, the movable sleeve is in driving connection with the micro power source, and the lining rod extends into the cover cylinder and is screwed with the movable sleeve.

[0023] Further, the worm is provided with a transmission rod connected with the movable sleeve at the top of the worm, and the transmission rod is a hollow rod.

[0024] When the micro power source drives the worm to rotate, the movable sleeve is synchronously driven to rotate through the transmission rod, so that the lining rod moves downward, the hollow transmission rod provides a moving space for the downward movement of the lining rod, so that the lining rod pulls the lifting sleeve body to separate from the clamping of the clamp.

[0025] Further, the cover cylinder is coated with sealing material at the connection with the carrier.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] The acceleration sensor is fixedly installed on the carrier, the cover cylinder is buckled on the carrier, the baffle is arranged in the inner cavity of the cover cylinder, and the baffle and the carrier hermetically contain the acceleration sensor in the formed isolation cavity. The lead of the acceleration sensor passes through the rubber sleeve on the baffle and is pulled out, which plays a role in isolating and protecting the acceleration sensor and preventing the acceleration sensor from being invaded by liquid in the medium.

[0028] The two rubber sleeve connecting lines are perpendicular to the mark means of the sensitive surface of the acceleration sensor, so that the two rubber sleeve connecting lines are directed to the explosion position. The two vertical pulling lead lines at the through slot are horizontally connected, so that the sensitive surface of the acceleration sensor is directed to the explosion position.

[0029] After the test device is placed in the hole through the clamp, the lifting sleeve moves downward to drive the plurality of moving rods to push the push block against the inner wall of the hole to keep preliminary fixation, the lifting sleeve continuously moves downward to separate from the clamp, automatic separation from the clamp is realized in the limited space of the hole, the plurality of lifting rods are pivoted to keep final fixation against the inner wall of the hole, so that the test device is kept highly stable in the hole, and after the filling material is filled, the test device is not easy to deviate, and the accuracy of explosion acceleration measurement is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1The overall structure schematic diagram of the acceleration testing device of the present application.

[0031] Figure 2 The partial sectional view of the acceleration testing device of the present application.

[0032] Figure 3 The schematic diagram of the cover cylinder and the carrier seat connection relationship of the present application.

[0033] Figure 4 The schematic diagram of the support assembly distribution on the cover cylinder of the present application.

[0034] Figure 5 The schematic diagram of the hanging sleeve structure of the present application.

[0035] Figure 6 The schematic diagram of the pulling assembly structure of the present application.

[0036] Figure 7 The schematic diagram of the hanging sleeve and the pad plate connection relationship of the present application.

[0037] Explanation of reference signs:

[0038] 10-carrier seat, 11-acceleration sensor, 20-cover cylinder, 201-ring groove, 21-baffle, 211-elastic ring, 212-rubber sleeve, 30-support assembly, 31-pad plate, 311-through groove, 32-micro power source, 321-worm, 33-lifting rod, 331-worm wheel, 34-moving rod, 341-push block, 40-hanging sleeve assembly, 41-straight rail, 42-guide rod, 421-inclined surface, 50-pulling assembly, 51-movable sleeve, 52-buffer rod, 53-transmission rod. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0040] Referring to Figures 1-7 , a medium internal acceleration testing device is provided to solve the defects that the prior art cannot measure the acceleration propagation inside the medium in explosion testing, and the problems that the sensor placed in the non-model medium is invaded by liquid and the sensor sensitivity surface cannot be guaranteed to be directional. The specific implementation conditions are as follows:

[0041] Embodiment 1

[0042] Referring to Figure 2 , Figure 3The carrier 10 is used to fix the acceleration sensor 11, and the cover tube 20 is buckled on the carrier 10, and the sealing material is arranged at the joint of the cover tube 20 and the carrier 10.

[0043] The sealing material coated epoxy resin material and the like adhesive material can effectively improve the sealing performance of the joint of the cover tube 20 and the carrier 10.

[0044] Referring to Figure 2 , Figure 3 , the cover tube 20 is provided with the baffle 21, the baffle 21 can be moved out of the inner cavity of the cover tube 20, and is used to mark the sensitive surface of the acceleration sensor 11, and the baffle 21 is arranged in the inner cavity of the cover tube 20 and forms an isolation cavity with the carrier 10 to seal and contain the acceleration sensor 11.

[0045] Referring to Figure 3 , the sensitive surface of the acceleration sensor 11 is observed and marked on the baffle 21 by the marking means before the baffle 21 is arranged in the inner cavity of the cover tube 20, so that the direction of the sensitive surface of the acceleration sensor 11 contained in the isolation cavity and isolated from the outside is obtained, thereby achieving the pre-alignment when the test device is placed in the hole.

[0046] Referring to Figure 2 , Figure 4 , the support assembly 30 includes the pad plate 31, the micro power source 32 and the plurality of lifting rods 33, the pad plate 31 is fixedly connected to the top of the cover tube 20, the through slot 311 is arranged on the pad plate 31, the micro power source 32 and the lead wire of the acceleration sensor 11 can be upwardly passed out along the through slot 311 without passing out from the side wall of the cover tube 20, and the lead wire is prevented from being rubbed and damaged with the inner wall of the hole when the test device is placed in the hole.

[0047] Referring to Figure 2 , Figure 4 , the micro power source 32 is arranged on the lower side of the pad plate 31, the micro power source 32 is preferably a micro motor, the micro power source 32 can be controlled by a wireless signal and has a battery pack, the plurality of lifting rods 33 are hingedly connected with the L-shaped rods of the pad plate 31, the pad plate 31 fixes the micro power source 32 through the inclined rod, the micro power source 32 is connected with the worm 321 at the output end, each lifting rod 33 is connected with the worm wheel 331, and the plurality of worm wheels 331 are respectively engaged with the worm 321.

[0048] Referring to Figure 1 , Figure 2The outer diameter of the backing plate 31 is greater than the outer diameter of the cover cylinder 20. The part of the cover cylinder 20 above the baffle plate 21 is provided with a plurality of side grooves for the extension of the lifting rods 33. The side grooves are provided with flexible bands on the upper and lower ends. The flexible bands are connected with the lifting rods 33. The flexible bands can be elastic bands. The flexible bands are deformed with the movement of the lifting rods 33 and play a sealing role on the side grooves to prevent the medium from entering. The lifting rods 33 are collected under the lower side of the backing plate 31 in the initial position, that is, the lifting rods 33 do not contact the inner wall of the hole during the placement of the hole.

[0049] The micro power source 32 can drive the plurality of lifting rods 33 to pivot against the inner wall of the hole to be finally fixed. The rotation of the worm 321 driven by the micro power source 32 drives the plurality of worm gears 331 to drive one of the lifting rods 33 to pivot, so that the lifting rod 33 pivots to extend out of the backing plate 31 and contacts the inner wall of the hole, and finally makes the test device fixed in the hole.

[0050] Referring to Figure 4 The hanging sleeve assembly 40 is used for being clamped by the clamp and is connected with the backing plate 31 through the pulling assembly 50. The hanging sleeve assembly 40 can be separated from the clamp downwardly during the process that the plurality of lifting rods 33 abut against the inner wall of the hole. When the test device is placed in the hole, the hanging sleeve assembly 40 is sent into the hole along the center of the hole after being clamped by the clamp. When the plurality of lifting rods 33 pivot, the hanging sleeve assembly 40 can move downwardly to separate from the fixed clamp, so that the automatic separation from the clamp in the limited space of the hole is realized, the operation is convenient, and meanwhile, the separation of the clamp does not affect the position of the test device in the hole.

[0051] Referring to Figure 1 The clamp clamps the two sides of the hanging sleeve assembly 40. The two sides of the top of the main body of the hanging sleeve assembly are provided with straight rails 41 which contact the clamp. The hanging sleeve assembly does not deflect when being placed in the hole clamped by the clamp. The clamping rods of the clamp are laterally limited by the straight rails 41, so that the sensitive surface of the acceleration sensor 11 is further ensured to be directed without change when being placed in the hole.

[0052] Embodiment 2

[0053] Referring to Figure 3 The inner wall of the cover cylinder 20 is provided with a ring groove 201. The outer circle of the baffle plate 21 is provided with an elastic ring 211. The elastic ring 211 is embedded in the ring groove 201 to form elastic sealing. The elastic ring 211 is preferably made of rubber.

[0054] Referring to Figure 2 , Figure 3 The baffle plate 21 is provided with two rubber sleeves 212. The two rubber sleeves 212 are respectively used for the two wires of the acceleration sensor 11 to pass out of the cover cylinder 20 along the through groove 311. The two rubber sleeves 212 are perpendicular to the sensitive surface of the acceleration sensor 11.

[0055] After the wire passes through the rubber sleeve 212, it is covered by the rubber sleeve 212, which has good sealing performance. By marking the line connecting the two rubber sleeves 212 perpendicular to the sensitive surface of the accelerometer 11, the line connecting the two rubber sleeves 212 is made to face the explosion location, so that the sensitive surface of the accelerometer 11 is pointed to the explosion location.

[0056] During the process of placing the baffle 21 into the inner cavity of the cover 20, the two wires are first passed through the rubber sleeves 212 respectively. After observing the sensitive surface of the accelerometer 11, they are then fitted into the annular groove 201 through the elastic ring 211, so that the line connecting the two rubber sleeves 212 is perpendicular to the sensitive surface of the accelerometer 11. The two wires are vertically pulled and pass through the through groove 311 out of the cover 20. Thus, before placement, the direction of the sensitive surface of the accelerometer 11 can be determined by the horizontal line connecting the two vertically pulled wires at the through groove 311. It should be noted that since the horizontal line connecting the two wires has two horizontal extension directions, it is necessary to determine one direction as the direction of the sensitive surface of the accelerometer 11. Since the two wires of the accelerometer 11 are different in color, etc., when determining the direction of the sensitive surface of the accelerometer 11, the direction of the horizontal extension at a certain wire should be used as the reference.

[0057] Example 3

[0058] See Figure 4 , Figure 5 The traction assembly 50 includes a movable sleeve 51 disposed on the pad 31 and a bushing 52 connected to the guide sleeve. The movable sleeve 51 is connected to the micro power source 32 for transmission, and the bushing 52 extends into the cover 20 and is screwed to the movable sleeve 51.

[0059] See Figure 4 , Figure 5 The top of the worm gear 321 is provided with a transmission rod 53 connected to the movable sleeve 51. The transmission rod 53 is a hollow rod. When the micro power source 32 drives the worm gear 321 to rotate, the transmission rod 53 synchronously drives the movable sleeve 51 to rotate, causing the bushing 52 to move downward. The hollow transmission rod 53 provides room for the downward movement of the bushing 52, thereby causing the bushing 52 to pull the lifting sleeve 40 downward to disengage from the clamp.

[0060] Example 4

[0061] See Figure 7 The hanging sleeve 40 is provided with multiple sets of guide rods 42, which are movably inserted through the pad 31. Multiple sets of moving rods 34 are transversely inserted through the pad 31. Each set of moving rods 34 is connected to a push block 341, and each set of guide rods 42 is provided with an inclined surface 421 that contacts a set of moving rods 34. Before the multiple lifting rods 33 pivot and abut against the inner wall of the hole, they drive the multiple sets of moving rods 34 to push the push block 341 against the inner wall of the hole to maintain initial fixation.

[0062] When the hanging sleeve assembly moves downward, the guide rod 42 drives the moving rod 34 to move, and the push block 341 is kept in initial fixation against the inner wall of the hole before the hanging sleeve assembly is separated from the clamp. After the hanging sleeve assembly is separated from the clamp, the plurality of lifting rods 33 are combined to abut against the inner wall of the hole, so that the test device is kept highly stable in the hole, and the filling material is not easy to cause deviation after filling, and the accuracy of explosion acceleration measurement is improved.

[0063] After the hanging sleeve assembly moves downward, the through slot 311 on the backing plate 31 is buckled inside.

[0064] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A media internal acceleration testing device, characterized by, The application relates to a fixed installation acceleration sensor (11) and a supporting device thereof. The inner wall of the cover cylinder (20) is detachably connected with a baffle (21), and the baffle (21) and the carrier (10) form an isolated cavity for sealingly containing the acceleration sensor (11); during installation, the sensitive surface position of the acceleration sensor (11) is marked on the baffle (21). The supporting assembly (30) comprises a base plate (31) fixed to the top of the cover cylinder, a micro power source (32) installed on the base plate, a worm (321) driven by the micro power source (32), and a plurality of lifting rods (33) hingedly connected with the base plate; a plurality of side grooves are formed in the side wall of the cover cylinder (20) for the lifting rods (33) to extend out of the side grooves; the micro power source (32) drives the worm to engage and drive the plurality of lifting rods (33) to pivotally abut against the inner wall of the hole to be finally fixed; a through groove (311) is formed in the plate body of the base plate (31), The lifting sleeve assembly (40) is connected with the base plate (31) through the pulling assembly (50) and is separated from the clamp downwardly during the abutting process of the lifting rods (33) and the inner wall of the hole; a straight rail (41) matched with the clamp is arranged on the top of the lifting sleeve body; The pulling assembly (50) comprises a movable sleeve (51) arranged on the base plate (31) and a lining rod (52) connected with the lifting sleeve body; the movable sleeve (51) is in transmission connection with the micro power source (32); and the lining rod (52) extends into the cover cylinder (20) and is screwed with the movable sleeve (51); The top of the worm (321) is provided with a transmission rod (53) connected with the movable sleeve (51); the transmission rod (53) is a hollow rod; when the micro power source (32) drives the worm (321) to rotate, the transmission rod (53) synchronously drives the movable sleeve (51) to rotate, so that the lining rod (52) moves downwardly; the hollow transmission rod (53) provides a moving space for the downward movement of the lining rod (52), so that the lining rod (52) pulls the straight rail downwardly to be separated from the clamping of the clamp.

2. The media internal acceleration test apparatus of claim 1, wherein, An annular groove (201) is arranged at the connecting position of the inner wall of the cover cylinder (20) and the baffle (21); an elastic ring (211) is arranged on the outer ring of the baffle (21); and the elastic ring (211) is embedded in the annular groove (201) to form elastic sealing.

3. The media internal acceleration test apparatus of claim 2, wherein, Two rubber sleeves (212) for two wires of the acceleration sensor (11) to pass out of the baffle (21) are arranged on the baffle (21); the two rubber sleeves (212) are perpendicular to the sensitive surface of the acceleration sensor (11); during installation, the two rubber sleeves (212) are arranged to face the explosion direction, so that the sensitive surface of the acceleration sensor (11) faces the explosion direction; the two wires of the acceleration sensor (11) are different; when the sensitive surface of the acceleration sensor (11) is determined to face the explosion direction, the direction of the transverse extension of one wire is used as the reference.

4. The media internal acceleration test apparatus of claim 3, wherein, The supporting assembly (30) further comprises a worm wheel (331) and a moving rod (34). The cushion plate (31) comprises a plate body, an inclined rod for fixing the micro power source (32), and an L-shaped rod hinged with the lifting rod, the plate body is fixed on the top of the cover cylinder (20) and has a diameter larger than the outer diameter of the cover cylinder, a plurality of through holes for accommodating the moving rods (34) are uniformly distributed in the inner periphery of the plate body, and a push block (341) is arranged at the outer end of the moving rod (34); The wires of the micro power source (32) and the acceleration sensor (11) are led out upward along the through groove (311); the output end of the micro power source (32) is connected with the worm (321), the worm (321) meshes with a plurality of worm gears (331), each worm gear (331) is connected with a lifting rod (33), and the lifting rod (33) is hinged with the L-shaped rod of the cushion plate; The lifting rod (33) is collected under the plate body of the cushion plate in the initial position, the micro power source (32) drives the worm (321) to rotate, so that the plurality of worm gears (331) respectively drive one lifting rod (33) to pivot, the lifting rod (33) is pivoted to extend out of the cushion plate (31) and contact the inner wall of the hole, and finally the test device is fixed in the hole.

5. The media internal acceleration testing apparatus of claim 4, wherein, The hanging sleeve assembly (40) comprises a hanging sleeve body, a straight rail (41), and a plurality of guide rods (42); the guide rod (42) is provided with an inclined surface (421) matched with the end surface of the moving rod (34), the guide rod (42) is movably arranged in the through groove (311) of the cushion plate (31), when the hanging sleeve assembly moves downward, the guide rod (42) pushes the moving rod (34) to move outward, the push block (341) is abutted against the inner wall of the hole to be preliminarily fixed before the hanging sleeve body is separated from the clamp, after the hanging sleeve body is separated from the clamp, the plurality of lifting rods (33) are abutted against the inner wall of the hole, so that the test device is highly stable in the hole; after the hanging sleeve assembly moves downward, the through groove (311) on the cushion plate (31) is buckled in the inner part of the hanging sleeve assembly.

6. The media internal acceleration test apparatus of claim 5, wherein, The flexible belt body is arranged between the side groove of the side wall of the cover cylinder (20) and the lifting rod (33) to block the side groove and prevent the medium from entering the cover cylinder; A flat surface is arranged at the end of the lifting rod (33) for abutting against the side wall of the hole.

7. The media internal acceleration test apparatus of claim 1, wherein, The connection part between the cover cylinder (20) and the carrier (10) is coated with sealing material.

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