阅读说明：本技术 玻纤聚氨酯泡沫板无损检测系统 (Nondestructive testing system for glass fiber polyurethane foam board ) 是由 管金国 黄海江 于 2021-07-26 设计创作，主要内容包括：本发明公开了一种玻纤聚氨酯泡沫板无损检测系统,包括检测架和输送组件,所述输送组件位于检测架的前后两侧,所述检测架上设置有若干探头组,所述探头组包括超声发射探头和超声接收探头,所述超声发射探头和超声接收探头分布于输送组件的上下两侧,所述超声接收探头连接有无源低噪前置放大器,本发明能够对玻纤聚氨酯泡沫板进行无损检测,保证所有的板材在出厂前均能够得到有效检测,检测结果清楚准确。(The invention discloses a nondestructive testing system for glass fiber polyurethane foam boards, which comprises a testing frame and conveying components, wherein the conveying components are positioned on the front side and the rear side of the testing frame, a plurality of probe groups are arranged on the testing frame, each probe group comprises an ultrasonic emission probe and an ultrasonic receiving probe, the ultrasonic emission probes and the ultrasonic receiving probes are distributed on the upper side and the lower side of the conveying components, and the ultrasonic receiving probes are connected with passive low-noise preamplifiers.)

1. The utility model provides a fine polyurethane foam board nondestructive test system of glass which characterized in that: the ultrasonic detection device comprises a detection frame and a conveying assembly, wherein the conveying assembly is located on the front side and the rear side of the detection frame, a plurality of probe groups are arranged on the detection frame and comprise ultrasonic emission probes and ultrasonic receiving probes, the ultrasonic emission probes and the ultrasonic receiving probes are distributed on the upper side and the lower side of the conveying assembly, and the ultrasonic receiving probes are connected with passive low-noise preamplifiers.

2. The nondestructive testing system for glass fiber polyurethane foam according to claim 1, wherein: the ultrasonic testing device is characterized in that a fixed rod is arranged above the testing frame, the two ends of the fixed rod are connected with the testing frame in a vertical sliding mode, a driving mechanism for driving the fixed rod to move is arranged on the testing frame, and the ultrasonic transmitting probe is arranged on the fixed rod.

3. The nondestructive testing system for glass fiber polyurethane foam according to claim 2, wherein: the fixing rod is provided with a fixing chuck, the fixing chuck is provided with an accommodating groove, the side face of the fixing chuck is provided with an elastic clamp groove, the elastic clamp groove extends to penetrate through the accommodating groove, and a locking bolt is arranged at the position, corresponding to the elastic clamp groove, of the fixing chuck.

4. The nondestructive testing system for glass fiber polyurethane foam according to claim 3, wherein: the conveying assembly comprises a conveyor belt or a conveyor roller.

5. The nondestructive testing system for glass fiber polyurethane foam according to claim 4, wherein: the rear side of the detection frame is also provided with a qualified receiving station and an unqualified receiving station, the qualified receiving station is positioned at the tail end of the conveying assembly, and the unqualified receiving station is positioned on the side face of the conveying assembly.

Technical Field

The invention belongs to the technical field of detection equipment, and particularly relates to a nondestructive detection system for a glass fiber polyurethane foam board.

Background

The density of the polyurethane board product is 35-500kg/m3, the product is formed by mixing MDI and POL double-component raw materials and then foaming, and due to continuity or mould forming foaming, cracking, air holes and the like can be generated in the product to influence the heat preservation performance, and no suitable nondestructive flaw detection equipment exists in the market at present.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the nondestructive testing device for the glass fiber polyurethane foam board, so that all boards can be effectively tested before leaving factories, and the testing result is clear and accurate.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fine polyurethane foam board nondestructive test system of glass, includes test rack and conveying assembly, conveying assembly is located the front and back both sides of test rack, be provided with a plurality of probe groups on the test rack, probe group is including ultrasonic emission probe and supersound receiving probe, supersound transmitting probe and supersound receiving probe distribute in the upper and lower both sides of conveying assembly, supersound receiving probe is connected with passive low noise preamplifier.

Further be provided with the dead lever above the testing stand, the both ends and the testing stand of dead lever are along vertical sliding connection, and are provided with the actuating mechanism that the drive dead lever removed on the testing stand, ultrasonic emission probe arranges on the dead lever.

Further be provided with fixed chuck on the dead lever, the holding tank has been seted up on the fixed chuck, and the side of fixed chuck has the elasticity and presss from both sides the groove, and the elasticity presss from both sides the groove and extends to run through to the holding tank, fixed chuck corresponds elasticity and presss from both sides groove department and is provided with the locking bolt.

Further said transport assembly comprises a conveyor belt or a conveyor roller.

Furthermore, a qualified receiving station and an unqualified receiving station are further arranged on the rear side of the detection frame, the qualified receiving station is located at the tail end of the conveying assembly, and the unqualified receiving station is located on the side face of the conveying assembly.

Compared with the prior art, the invention has the beneficial effects that: the invention can realize the continuous multi-position nondestructive detection of the foam board by arranging the probe groups along the transverse direction, detecting the width of the whole foam board and moving the foam board along the length direction on the conveying component, has high detection efficiency, increases the detection sensitivity of the ultrasonic receiving probe by the passive low-noise preamplifier, can inhibit the external noise to the maximum extent without additional power supply by the module, and completes the power supply and the received signal acquisition by the same signal line by directly connecting the module with the ultrasonic receiving probe; the height of the ultrasonic transmitting probe can be adjusted according to foam boards with different thicknesses, and the ultrasonic transmitting probe is wide in application range.

Drawings

FIG. 1 is a perspective view of a nondestructive inspection system for glass fiber polyurethane foam boards according to the present invention;

FIG. 2 is a side view of the glass fiber polyurethane foam board non-destructive inspection system of the present invention;

FIG. 3 is a perspective view of the fixed collet in cooperation with an ultrasonic transmission probe;

fig. 4 is a schematic position diagram of the whole of the detection frame and the conveying assembly.

Reference numerals: 1. a detection frame; 2. a delivery assembly; 3. a foam board; 4. fixing the rod; 5. a support bar; 61. an ultrasonic emission probe; 62. an ultrasonic receiving probe; 7. fixing the chuck; 76. an elastic clip groove; 8. an unqualified receiving station; 9. and (6) receiving stations in a qualified mode.

Detailed Description

Embodiments of the nondestructive inspection system for glass fiber polyurethane foam board according to the present invention will be further explained with reference to fig. 1 to 4.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.

The nondestructive testing system for the glass fiber polyurethane foam board comprises a testing frame 1 and a conveying assembly 2, wherein the conveying assembly 2 is located on the front side and the rear side of the testing frame 1, a plurality of probe groups are arranged on the testing frame 1 and comprise an ultrasonic emission probe 61 and an ultrasonic receiving probe 62, the ultrasonic emission probe 61 and the ultrasonic receiving probe 62 are distributed on the upper side and the lower side of the conveying assembly 2, and the ultrasonic receiving probe 62 is connected with a passive low-noise preamplifier.

Preferably, a fixing rod 4 is arranged above the detection frame 1, two ends of the fixing rod 4 are connected with the detection frame 1 in a vertical sliding manner, a driving mechanism for driving the fixing rod 4 to move is arranged on the detection frame 1, and the ultrasonic emission probe 61 is arranged on the fixing rod 4.

The preferred drive mechanism is a combination of a drive motor and a lead screw nut.

This embodiment is preferred be provided with fixed chuck 7 on the dead lever 4, the holding tank has been seted up on the fixed chuck 7, and the side of fixed chuck 7 has the elastic clamp groove 76, and the elastic clamp groove 76 extends to run through to the holding tank, fixed chuck 7 corresponds elastic clamp groove 76 department and is provided with the locking bolt, and ultrasonic emission probe 61 is fixed in the holding tank, can conveniently carry out the dismouting, and during the dismouting, need not additionally to adjust ultrasonic emission probe 61's angle.

Of course, the support bar 5 can also be provided on the underside of the test stand 1, and all the ultrasound receiving probes are fixed to the support bar 5 by means of the fixing clamps 7.

The conveying assembly 2 preferred in this embodiment includes a conveying belt or a conveying roller, wherein the conveying belt or the conveying roller is interrupted at the position of the detection frame 1 corresponding to the probe group, so as to avoid blocking transmission of the ultrasonic signal.

The rear side of the detection frame 1 is further provided with a qualified receiving station 9 and an unqualified receiving station 8, the qualified receiving station 9 is located at the tail end of the conveying assembly 2, the unqualified receiving station 8 is located on the side face of the conveying assembly 2, the unqualified receiving station 8 is preferably further provided with an unqualified blanking cylinder which is located on the opposite side of the conveying assembly 2 corresponding to the unqualified receiving station 8, and when the system detects an unqualified foam plate 3, the unqualified foam plate 3 is pushed to the unqualified receiving station 8 by the unqualified blanking cylinder for processing.

The parameters of the glass fiber polyurethane foam board 3 to be detected in this example are as follows: the width is 500-2000mm, the length is 1000-3300 mm, the density is 50kg/m3-270kg/m3, and the thickness is 65-380 mm.

In the preferred multichannel air-coupled ultrasonic system adopting the AIRSCAN + in the embodiment, the multichannel air-coupled ultrasonic system can simultaneously excite at most 16 channels in parallel and can be connected with 16 air-coupled ultrasonic probes for receiving, so that 16-channel parallel scanning is realized, an excitation signal is a 400Vpp square wave pulse train, and an LFM linear frequency modulation pulse compression technology and a 1Gb/s high-speed network port communication interface are supported. The host system provides matched imaging software and SDK, and a user can develop imaging software and algorithm based on API (application program interface) and can also directly use the imaging software to detect; for the motion scanning system, the host is provided with an XYZ three-axis encoder interface, so that a user can conveniently realize complex motion control scanning imaging. The host adopts a modular design, so that a user can flexibly increase or reduce the number of channels according to the requirement, and meanwhile, the maintenance cost is reduced.

When the passive low-noise preamplifier is used for transmission-reception-transmission detection, the detection sensitivity of a receiving end is increased, the module does not need additional power supply, and external noise can be suppressed to the greatest extent. By directly connecting with the ultrasonic receiving probe 62, both power supply and received signal acquisition are completed through the same signal line; has 0dB, 30dB and 60dB multistage amplification function.

And adopts the following detection process: the working frequency of the probe group is 50KHz, the transduction diameter is 54mm, the shell diameter is 65mm, and the BNC top interface is arranged; 12 groups of high-sensitivity air coupling ultrasonic probes; 16/16 channel non-contact air coupling ultrasonic host (reserve 4 channels for standby or as future upgrade extension detection width); the 12 groups of probes are sequentially arranged in the transverse direction (the width direction of the foam board 3 and the direction perpendicular to the advancing direction of the foam board 3) through a customized tool, and the ultrasonic transmitting probe 61 and the ultrasonic receiving probe 62 do not act in the detection process; the conveyor belt transmits the detected foam board 3 to pass through the probe group for detection, and a signal of a conveyor belt encoder needs to be accessed into the ultrasonic host; the ultrasonic emission probe 61 can move up and down through electrical control and is matched with the foam boards 3 with different thicknesses for detection; the detection software can display the waveform and the composite image and automatically judge NG; after the software judges the NG, the reserved analog output is considered, and a trigger signal is provided for processing or rejecting an NG plate in the next procedure.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.