A WPC plastic wood sound barrier screen body compression test equipment and process

Abstract

The present invention relates to the field of pressure resistance testing technology, specifically a WPC plastic wood sound barrier screen pressure resistance testing device, comprising a base, a support unit, a pressure testing unit, a crack positioning unit, an ultrasonic detection unit, and a computer. The support unit is fixedly arranged on the top of the base and is used to support the WPC plastic wood sound barrier screen. The pressure testing unit is fixedly arranged on the top of the base and is located on one side of the support unit, and is used to apply pressure to the top of the WPC plastic wood sound barrier screen. The crack positioning unit can quickly locate the position of the cracks in the WPC plastic wood sound barrier screen, further transmit the crack position signal to the computer, and then execute the operation of the ultrasonic detection unit to ultrasonically detect the cracks in the WPC plastic wood sound barrier screen, thereby solving the technical problem in the prior art that the crack position of the WPC plastic wood sound barrier screen cannot be quickly located, and improving the efficiency of the pressure resistance test of the WPC plastic wood sound barrier screen.

Description

Technical Field

[0001] The present invention relates to the technical field of compression testing, and in particular to a WPC (wood plastic sound barrier) screen compression testing device and a process thereof. Background Art

[0002] Wood-Plastic Composites (WPC) is a new type of composite material that has been booming in recent years both domestically and internationally. It refers to the use of polyethylene, polypropylene and polyvinyl chloride instead of conventional resin adhesives, mixed with more than 50% of waste plant fibers such as wood powder, rice husks and straw to form new wood materials. The materials are then processed through plastic processing techniques such as extrusion, molding and injection molding to produce boards or profiles. Currently, they are widely used in the production of sound barriers. In order to know the compressive effect of each plastic-wood sound barrier, they need to be subjected to compression testing to prevent unqualified products from entering the market.

[0003] A Chinese patent with reference application number 202411143299.6 discloses a pressure detection device for testing the compressive resistance of display panels in production. By pressing down on the display panel, more measurement areas can be covered during the detection process. During the pressure application process, the area of ​​the display panel is continuously covered from a smaller point area to an increasing area for detection. During the detection process, the external pressure from a small area to a large area is simulated in actual use to detect the durability and stability of the display panel when subjected to external pressure. When the above device is used in the compression test of WPC plastic wood sound barrier screen, it is found that after pressure is applied to the WPC plastic wood sound barrier screen, it is necessary to investigate whether the WPC plastic wood sound barrier screen has irreversible deformation and whether cracks appear, so as to comprehensively judge the compression effect of the WPC plastic wood sound barrier screen. However, for larger cracks, we can quickly observe the specific location with the naked eye, while for fine cracks, it is difficult to find them with the naked eye. At the same time, due to the randomness of the crack location, it is impossible to predict the crack location. An ultrasonic probe needs to be used to detect along the surface of the WPC plastic wood sound barrier screen, which is time-consuming and labor-intensive, and seriously affects the compression test efficiency of the WPC plastic wood sound barrier screen. We propose a WPC plastic wood sound barrier screen compression test device and process to solve the above technical problems. Summary of the Invention

[0004] The present invention provides the following technical solution: a WPC plastic wood sound barrier screen body compression test equipment, comprising:

[0005] base;

[0006] The support unit is fixed on the top of the base and is used to support the WPC plastic wood sound barrier screen;

[0007] The pressure test unit is fixed on the top of the base and located on one side of the support unit, and is used to apply pressure to the top of the WPC plastic wood sound barrier screen;

[0008] The crack locating unit is fixed on the top of the base and located inside the supporting unit, and is used to locate cracks in the WPC plastic wood sound barrier screen;

[0009] Ultrasonic detection unit, fixed on the top of the base, is used to measure the size of cracks in the WPC plastic wood sound barrier screen;

[0010] Computer, fixedly mounted on the surface of the pressure test unit.

[0011] As a preferred solution of the present invention, the support unit includes:

[0012] The support uprights are fixedly mounted on the top of the base in a left-right layout;

[0013] The support table frame is fixedly installed on the top of the left and right support vertical plates;

[0014] The placement groove is formed on the top of the support frame and extends into the interior of the support frame;

[0015] A No. 1 rubber pad is fixedly installed at the bottom of the placement groove, and the top of the No. 1 rubber pad is 2 to 2.5 mm higher than the top of the support frame;

[0016] The pressure ring is fixedly mounted on the top of the support frame through a plurality of buckles, and the specifications of the pressure ring are adapted to those of the No. 1 rubber pad.

[0017] As a preferred solution of the present invention, the pressure testing unit includes:

[0018] The stand is fixedly mounted on one end of the top of the base;

[0019] The oil cylinder is fixedly installed on the side of the platform, and the oil cylinder is located directly above the supporting unit.

[0020] As a preferred solution of the present invention, the crack locating unit includes:

[0021] The cylinder is fixedly installed on the top of the base in a U-shaped distribution and is located between the left and right supporting vertical plates;

[0022] The box is fixedly mounted on the top of the output rods of multiple cylinders;

[0023] The coupling plate is fixedly mounted on the upper inner wall of the box;

[0024] The separated chambers are opened on the top of the coupling plate in a vertical and horizontal distribution;

[0025] The air guide box is fixedly installed at the bottom of the partition chamber in a vertical and horizontal distribution;

[0026] A through hole is provided through the middle of the bottom of the gas guide box;

[0027] The gas cylinder is fixedly mounted on the bottom of the gas guide box and is located outside the opening of the through hole;

[0028] A drainage port is provided through the lower portion of the outer wall of the cylinder;

[0029] The in-position switch is fixedly mounted on the bottom of the cylinder and extends into the interior of the cylinder;

[0030] The corrugated diaphragm is located inside the gas cylinder, and the outer wall of the corrugated diaphragm is in contact with the inner wall of the gas cylinder;

[0031] The pressure column is fixedly installed on the bottom of the corrugated diaphragm and is located directly above the in-place switch. The bottom of the pressure column and the top of the in-place switch are clearance-matched.

[0032] As a preferred solution of the present invention, the crack locating unit further includes:

[0033] The air guide hole is opened through the bottom of the box;

[0034] Vacuum pump, fixedly mounted on the top of the base

[0035] The air pipe is fixedly installed between the bottom of the air guide hole and the output end of the vacuum pump.

[0036] As a preferred solution of the present invention, the crack locating unit further includes:

[0037] A sliding hoop is slidably mounted on the inner wall of the gas cylinder, and the top of the sliding hoop is fixedly connected to the bottom edge of the corrugated diaphragm;

[0038] Spring No. 1 is fixedly installed at the bottom of the sliding hoop;

[0039] A limit stop ring is fixedly mounted on the inner wall of the cylinder, wherein the top of the limit stop ring is fixedly connected to the bottom of the first spring;

[0040] The corrugated retaining strips are fixedly mounted on the inner wall of the limit retaining ring in a circular array.

[0041] As a preferred solution of the present invention, the crack locating unit further includes:

[0042] Reset the top plate, which is fixedly installed on the outer wall of the pressure column;

[0043] The No. 2 spring is located at the periphery of the pressure column and is fixedly installed between the bottom of the reset top plate and the bottom wall of the air cylinder. The elastic force of the No. 2 spring is smaller than the elastic force of the No. 1 spring.

[0044] As a preferred solution of the present invention, the crack locating unit further includes:

[0045] No. 2 rubber pad, fixedly installed on the top of the coupling plate;

[0046] The square notches are vertically and horizontally distributed through the top of the second rubber pad, and the specifications and positions of the square notches are adapted to the specifications and positions of the partition chambers.

[0047] As a preferred solution of the present invention, the ultrasonic detection unit includes:

[0048] The support frame is fixedly installed at the top rear end of the base in parallel front and back;

[0049] The X-axis translation component is fixed on the top of the front and rear support frames;

[0050] The translation frame is fixedly installed on the top of the moving end of the X-axis translation component;

[0051] The Y-axis translation component is fixedly mounted on the top wall of the translation frame;

[0052] The connecting plate is fixedly mounted on the bottom of the moving end of the Y-axis translation component;

[0053] The ultrasonic testing head is fixedly installed at the bottom of the connecting plate.

[0054] A compression test process for a WPC plastic wood sound barrier screen compression test device includes the following steps:

[0055] S1. Place the WPC plastic wood sound barrier screen on the top of the support unit, fix the pressure ring on the top edge of the WPC plastic wood sound barrier screen through the buckle, and position the WPC plastic wood sound barrier screen;

[0056] S2. The pressure test unit applies downward pressure on the top of the WPC plastic wood sound barrier screen to perform a pressure test;

[0057] S3, the cylinder pushes the box and coupling plate upwards, so that the top of the No. 2 rubber pad rests on the bottom of the WPC plastic wood sound barrier screen;

[0058] S4. The vacuum pump is started to suck the air inside the box through the trachea and the air inside the cylinder at the bottom of the corrugated diaphragm through the drainage port, resulting in negative pressure inside the box and the cylinder, so that the corrugated diaphragm has the potential energy to stretch downward;

[0059] S5. The corrugated diaphragm has the potential energy to stretch downward, resulting in negative pressure inside the air guide box and the separation chamber, which absorbs the bottom of the WPC plastic wood sound barrier screen downward through the separation chamber. The negative pressure inside the air guide box near the cracked part of the WPC plastic wood sound barrier screen draws the air at the top of the WPC plastic wood sound barrier screen through the crack of the WPC plastic wood sound barrier screen into the interior of the air guide box, gradually balancing the pressure difference between the top and bottom of the corrugated diaphragm, so that the corrugated diaphragm continues to stretch downward, driving the pressure column to move together until the bottom of the pressure column contacts the top of the in-place switch, while the negative pressure inside the air guide box and the separation chamber in the part where the WPC plastic wood sound barrier screen has no cracks cannot be compensated. Therefore, after the corrugated diaphragm in this area stretches downward for a distance, under the action of the negative pressure at its upper end, the corrugated diaphragm cannot continue to move downward, and the pressure column at its bottom will not contact the top of the in-place switch;

[0060] S6. The bottom of the pressure column contacts the top of the in-position switch to generate an electrical signal which is transmitted to the computer, thereby controlling the movement of the X-axis translation component and the Y-axis translation component, driving the connecting plate and the ultrasonic detection head to move to the crack position for crack detection.

[0061] Compared with the prior art, the present invention has the following beneficial effects:

[0062] 1. The present invention can quickly locate the crack position of the WPC plastic wood sound barrier screen through the crack positioning unit, further transmit the crack position signal to the computer, and then execute the operation of the ultrasonic detection unit to perform ultrasonic detection on the cracks of the WPC plastic wood sound barrier screen, thereby solving the technical problem in the prior art that the crack position of the WPC plastic wood sound barrier screen cannot be quickly located, and improving the efficiency of the compression test of the WPC plastic wood sound barrier screen.

[0063] 2. During use of the present invention, if the negative pressure in the bottom area of ​​the corrugated diaphragm of the crack locating unit is too large, the corrugated diaphragm will be completely stretched and moved downward, further driving the sliding hoop to slide downward along the inner wall of the air cylinder, causing the No. 1 spring to compress and accumulate force, providing upward reset potential energy for the sliding hoop and the corrugated diaphragm, and the downward movement of the corrugated diaphragm causes its surface to abut against the top of the corrugated baffle, thereby providing support to the corrugated diaphragm through the corrugated baffle, thereby preventing the corrugated diaphragm from being overloaded and ruptured. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a structural schematic diagram of the present invention;

[0065] Figure 2 For the present invention Figure 1 Schematic diagram of the local structure;

[0066] Figure 3 Schematic diagram of the structure of the support unit in the present invention;

[0067] Figure 4 Schematic diagram of the structure of the crack locating unit in the present invention;

[0068] Figure 5 It is a schematic diagram of the side cross-section structure of the box body in the present invention;

[0069] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A;

[0070] Figure 7 Schematic diagram of the side cross-section structure of the air guide box of the present invention;

[0071] Figure 8 Schematic diagram of the partial structure of the air guide box in the present invention;

[0072] Figure 9 Schematic diagram of the side cross-section structure of the air guide box in the present invention;

[0073] Figure 10 It is a structural schematic diagram of the corrugated baffle in the present invention.

[0074] In the figure: 100, base; 200, support unit; 201, support plate; 202, support frame; 203, mounting groove; 204, No. 1 rubber pad; 205, pressure ring; 300, pressure test unit; 301, stand; 302, oil cylinder; 400, crack locating unit; 401, cylinder; 402, box; 403, coupling plate; 404, partition chamber; 405, air guide box; 406, air hole; 407, air cylinder; 408, drainage port; 409, in-position switch; 4010, corrugated diaphragm; 4011 , pressure column; 4012, air guide hole; 4013, vacuum pump; 4014, air pipe; 4015, sliding hoop; 4016, No. 1 spring; 4017, limit ring; 4018, corrugated baffle; 4019, reset top plate; 4020, No. 2 spring; 4021, No. 2 rubber pad; 4022, square notch; 500, ultrasonic detection unit; 501, support frame; 502, X-axis translation component; 503, translation frame; 504, Y-axis translation component; 505, connecting plate; 506, ultrasonic detection head; 600, computer. DETAILED DESCRIPTION

[0075] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0076] See also Figures 1 to 10The technical solution provided by the present invention specifically includes the following embodiments:

[0077] A WPC plastic wood sound barrier screen pressure resistance testing device includes a base 100, a support unit 200, a pressure testing unit 300, a crack locating unit 400, an ultrasonic detection unit 500 and a computer 600. The support unit 200 is fixedly arranged on the top of the base 100 and is used to support the WPC plastic wood sound barrier screen. The pressure testing unit 300 is fixedly arranged on the top of the base 100 and is located on one side of the support unit 200 and is used to apply pressure to the top of the WPC plastic wood sound barrier screen. The crack locating unit 400 is fixedly arranged on the top of the base 100 and is located inside the support unit 200 and is used to locate cracks in the WPC plastic wood sound barrier screen. The ultrasonic detection unit 500 is fixedly arranged on the top of the base 100 and is used to measure the size of cracks in the WPC plastic wood sound barrier screen. The computer 600 is fixedly installed on the surface of the pressure testing unit 300.

[0078] For further details, please refer to Figure 1 、 Figure 2 As shown:

[0079] The support unit 200 includes a support vertical plate 201, a support table frame 202, a mounting groove 203, a No. 1 rubber pad 204 and a pressure ring 205. The support vertical plate 201 is fixedly installed on the top of the base 100 in a left-right layout. The support table frame 202 is fixedly installed on the top of the left and right support vertical plates 201. The mounting groove 203 is opened at the top of the support table frame 202 and extends to the interior of the support table frame 202. The No. 1 rubber pad 204 is fixedly installed at the bottom of the mounting groove 203. The top of the No. 1 rubber pad 204 is 2 to 2.5 mm higher than the top of the support table frame 202. The pressure ring 205 is fixedly installed on the top of the support table frame 202 by multiple clips. The specifications of the pressure ring 205 are compatible with the specifications of the No. 1 rubber pad 204.

[0080] Specifically, place the WPC plastic wood sound barrier screen flat on the top of the No. 1 rubber pad 204, and adjust the position of the WPC plastic wood sound barrier screen to try to ensure that the WPC plastic wood sound barrier screen is centered, press the pressure ring 205 on the top of the WPC plastic wood sound barrier screen, and limit the pressure ring 205 through multiple buckles so that its bottom is pressed on the top of the WPC plastic wood sound barrier screen, ensuring that the bottom of the WPC plastic wood sound barrier screen is tightly fitted with the top of the No. 1 rubber pad 204.

[0081] For further details, please refer to Figure 1 、 Figure 2 As shown:

[0082] The pressure testing unit 300 includes a stand 301 and a cylinder 302 . The stand 301 is fixedly mounted on one end of the top of the base 100 , and the cylinder 302 is fixedly mounted on the side of the stand 301 . The cylinder 302 is located directly above the support unit 200 .

[0083] Specifically, the downward pressure parameters of the cylinder 302 are set through the computer 600, and the output rod of the cylinder 302 is extended downward so that its bottom applies downward pressure to the top of the WPC plastic wood sound barrier screen body, and after maintaining downward pressure on the top of the WPC plastic wood sound barrier screen body for 15 seconds, the output rod of the cylinder 302 is reset upward (this process is entirely controlled by the computer 600 and belongs to the existing technical field, and the specific process and principle will not be described in detail).

[0084] For further details, please refer to Figures 3 to 9 As shown:

[0085] The crack positioning unit 400 includes a cylinder 401, a box 402, a coupling plate 403, a partition chamber 404, an air guide box 405, a through hole 406, an air cylinder 407, a drainage port 408, an in-position switch 409, a corrugated diaphragm 4010, a pressure column 4011, an air guide hole 4012, a vacuum pump 4013, an air pipe 4014, a No. 2 rubber pad 4021 and a square notch 4022. The cylinder 401 is fixedly installed on the top of the base 100 in a U-shaped distribution and is located on the left and right support plates. 201, the box body 402 is fixedly mounted on the top of the output rods of the multiple cylinders 401, the coupling plate 403 is fixedly mounted on the upper part of the inner wall of the box body 402, the partition chamber 404 is opened through the top of the coupling plate 403 in a vertical and horizontal distribution, the air guide box 405 is fixedly mounted on the bottom of the partition chamber 404 in a vertical and horizontal distribution, the through hole 406 is opened through the middle position of the bottom of the air guide box 405, the air cylinder 407 is fixedly mounted on the bottom of the air guide box 405, and is located at the opening of the through hole 406. The outer periphery of the mouth, the drainage port 408 is opened through the lower part of the outer wall of the air cylinder 407, the in-place switch 409 is fixedly installed at the bottom of the air cylinder 407 and extends to the inside of the air cylinder 407, the corrugated diaphragm 4010 is located inside the air cylinder 407, and the outer wall of the corrugated diaphragm 4010 is in contact with the inner wall of the air cylinder 407, the pressure column 4011 is fixedly installed at the bottom of the corrugated diaphragm 4010 and is located directly above the in-place switch 409, and the bottom of the pressure column 4011 and the top of the in-place switch 409 are clearance fit. The air guide hole 4012 is opened through the bottom of the box body 402, the vacuum pump 4013 is fixedly installed on the top of the base 100, the air pipe 4014 is fixedly installed between the bottom of the air guide hole 4012 and the output end of the vacuum pump 4013, the No. 2 rubber pad 4021 is fixedly installed on the top of the coupling plate 403, and the square notches 4022 are opened through the top of the No. 2 rubber pad 4021 in a vertical and horizontal distribution, and the specifications and positions of the square notches 4022 are compatible with the specifications and positions of the partition chamber 404.

[0086] Specifically, after the pressure test of the WPC plastic wood sound barrier screen, the box body 402 is lifted upward by the output rod of the cylinder 401, driving the coupling plate 403, the second rubber pad 4021, the air guide box 405, etc. to move. When the top of the second rubber pad 4021 is tightly in contact with the bottom of the WPC plastic wood sound barrier screen, the cylinder 401 is closed and the upward lifting of the box body 402 is stopped, so that the top of the second rubber pad 4021 remains in contact with the bottom of the WPC plastic wood sound barrier screen. The vacuum pump 4013 is operated to generate negative pressure suction, and the suction is transmitted to the coupling plate 403 through the air pipe 4014. Then, the air is conducted to the interior of the air guide box 405 through the drainage port 408, and is located inside the area at the bottom of the corrugated diaphragm 4010. Since the air pressure at the bottom of the corrugated diaphragm 4010 is less than the air pressure at the top, the corrugated diaphragm 4010 drives the pressure column 4011 downward to move. Due to the contact between the top of the No. 2 rubber pad 4021 and the bottom of the WPC plastic wood sound barrier screen, the bottom of the WPC plastic wood sound barrier screen forms a closed cavity through the No. 2 rubber pad 4021 and the interior of the partition chamber 404, the interior of the air guide box 405 and the top area of ​​the corrugated diaphragm 4010. Therefore, the corrugated diaphragm 4010 In the process of downward extension, negative pressure is also generated in the top area of ​​the corrugated diaphragm 4010, which inhibits the corrugated diaphragm 4010 from continuing to extend downward. That is to say, the corrugated diaphragm 4010 stops extending after extending downward for a certain distance. Therefore, the bottom of the pressure column 4011 does not contact the top of the in-place switch 409. In the process of downward extension of the corrugated diaphragm 4010 near the crack position of the WPC plastic wood sound barrier screen, the internal negative pressure in the top area of ​​the corrugated diaphragm 4010 will suck the air on the top of the WPC plastic wood sound barrier screen through the cracks in the WPC plastic wood sound barrier screen. The interior of the partition chamber 404 and the air guide box 405 is replenished, thereby replenishing the air pressure inside the partition chamber 404 and the air guide box 405. Therefore, the corrugated diaphragm 4010 at this position continues to stretch downward under the action of the negative pressure at its bottom, and continues to push the pressure column 4011 to move downward until the bottom of the pressure column 4011 contacts the top of the in-place switch 409. The in-place switch 409 transmits a signal to the computer 600, so that the computer 600 can obtain the crack position, and start the ultrasonic detection unit 500 according to the signal provided by the in-place switch 409 to quickly detect cracks on the PC plastic wood sound barrier screen.

[0087] For further details, please refer to Figure 2 As shown:

[0088] The ultrasonic detection unit 500 includes a support frame 501, an X-axis translation component 502, a translation frame 503, a Y-axis translation component 504, a connecting plate 505 and an ultrasonic detection head 506. The support frame 501 is fixedly installed in parallel at the top rear end of the base 100, the X-axis translation component 502 is fixedly set on the top of the front and rear support frames 501, the translation frame 503 is fixedly installed on the top of the moving end of the X-axis translation component 502, the Y-axis translation component 504 is fixedly installed on the top wall of the translation frame 503, the connecting plate 505 is fixedly installed at the bottom of the moving end of the Y-axis translation component 504, and the ultrasonic detection head 506 is fixedly installed at the bottom of the connecting plate 505.

[0089] Specifically, the bottom of the pressure column 4011 contacts the top of the in-position switch 409, and the in-position switch 409 transmits a signal to the computer 600, so that the computer 600 can obtain the crack position, and start the X-axis translation component 502 and the Y-axis translation component 504 according to the signal provided by the in-position switch 409, driving the connecting plate 505 and the ultrasonic detection head 506 to move quickly to the crack position, without the need to perform an overall scan of the top of the WPC plastic wood sound barrier screen, saving test time and improving test efficiency (the X-axis translation component 502 and the Y-axis translation component 504 can be set in the form of electric slide rails, which belongs to the existing technology).

[0090] For further details, please refer to Figure 9 As shown:

[0091] The crack locating unit 400 also includes a sliding hoop 4015, a No. 1 spring 4016, a limit ring 4017 and a corrugated retaining strip 4018. The sliding hoop 4015 is slidably mounted on the inner wall of the air cylinder 407. The top of the sliding hoop 4015 is fixedly connected to the bottom edge of the corrugated diaphragm 4010. The No. 1 spring 4016 is fixedly mounted on the bottom of the sliding hoop 4015. The limit ring 4017 is fixedly mounted on the inner wall of the air cylinder 407. The top of the limit ring 4017 is fixedly connected to the bottom of the No. 1 spring 4016. The corrugated retaining strip 4018 is fixedly mounted on the inner wall of the limit ring 4017 in a circular array.

[0092] Specifically, if the negative pressure in the bottom area of ​​the corrugated diaphragm 4010 is too large, the corrugated diaphragm 4010 is completely stretched and moved downward, further driving the sliding hoop 4015 to slide downward along the inner wall of the air cylinder 407, causing the No. 1 spring 4016 to compress and accumulate force, providing upward reset potential energy for the sliding hoop 4015 and the corrugated diaphragm 4010, and the downward movement of the corrugated diaphragm 4010 causes its surface to abut against the top of the corrugated baffle 4018, and then the corrugated baffle 4018 provides support to the corrugated diaphragm 4010, thereby preventing the corrugated diaphragm 4010 from overload and rupture.

[0093] For further details, please refer to Figure 8 As shown:

[0094] The crack positioning unit 400 also includes a reset top plate 4019 and a No. 2 spring 4020. The reset top plate 4019 is fixedly mounted on the outer wall of the pressure column 4011. The No. 2 spring 4020 is located on the periphery of the pressure column 4011 and is fixedly mounted between the bottom of the reset top plate 4019 and the bottom wall of the air cylinder 407. The elastic force of the No. 2 spring 4020 is less than the elastic force of the No. 1 spring 4016.

[0095] Specifically, when the corrugated diaphragm 4010 extends downward, it drives the pressure column 4011 to move downward together. The downward movement of the pressure column 4011 will drive the reset top plate 4019 to move together, thereby compressing the No. 2 spring 4020 to store force to provide the pressure column 4011 and the corrugated diaphragm 4010 with upward reset potential energy, so that after the detection is completed, the pressure column 4011 and the corrugated diaphragm 4010 can be reset by the rebound force of the No. 2 spring 4020, which is convenient for subsequent use.

[0096] A compression test process for a WPC plastic wood sound barrier screen compression test device includes the following steps:

[0097] S1. Place the WPC plastic wood sound barrier screen on top of the support unit 200, fix the pressure ring 205 on the top edge of the WPC plastic wood sound barrier screen by snapping, and position the WPC plastic wood sound barrier screen;

[0098] S2, the pressure test unit 300 applies downward pressure to the top of the WPC plastic wood sound barrier screen to perform a pressure test;

[0099] S3, the cylinder 401 pushes the box 402 and the coupling plate 403 upward, so that the top of the second rubber pad 4021 rests on the bottom of the WPC plastic wood sound barrier screen;

[0100] S4: The vacuum pump 4013 is started to suck the air inside the box 402 through the air pipe 4014 and the air inside the air cylinder 407 at the bottom of the corrugated diaphragm 4010 through the drainage port 408, resulting in negative pressure inside the box 402 and the air cylinder 407, so that the corrugated diaphragm 4010 has the potential to expand downward.

[0101] S5. The corrugated diaphragm 4010 has the potential energy to stretch downward, causing negative pressure inside the air guide box 405 and the partition chamber 404. The partition chamber 404 absorbs the bottom of the WPC plastic wood sound barrier screen downward, and the negative pressure inside the air guide box 405 near the cracks in the WPC plastic wood sound barrier screen passes through the cracks in the WPC plastic wood sound barrier screen, and the air on the top of the WPC plastic wood sound barrier screen is sucked into the interior of the air guide box 405 through the WPC plastic wood sound barrier screen, gradually balancing the pressure at the top and bottom of the corrugated diaphragm 4010. The difference causes the corrugated diaphragm 4010 to continue to stretch downward, driving the pressure column 4011 to move together until the bottom of the pressure column 4011 contacts the top of the in-place switch 409. The negative pressure inside the air guide box 405 and the partition chamber 404 in the part where the WPC plastic wood sound barrier screen has no cracks cannot be compensated. Therefore, after the corrugated diaphragm 4010 in this area stretches downward for a distance, under the action of the negative pressure at its upper end, the corrugated diaphragm 4010 cannot move downward any further, and the pressure column 4011 at its bottom will not contact the top of the in-place switch 409.

[0102] S6. The bottom of the pressure column 4011 contacts the top of the in-position switch 409 to generate an electrical signal which is transmitted to the computer 600, thereby controlling the movement of the X-axis translation component 502 and the Y-axis translation component 504, driving the connecting plate 505 and the ultrasonic detection head 506 to move to the crack position for crack detection.

[0103] This scheme is a WPC plastic wood sound barrier screen body compression test equipment. When working, it is divided into the following steps:

[0104] Fixing the WPC plastic wood sound barrier screen: Place the WPC plastic wood sound barrier screen flat on the top of the No. 1 rubber pad 204, and adjust the position of the WPC plastic wood sound barrier screen, try to ensure that the WPC plastic wood sound barrier screen is centered, press the pressure ring 205 on the top of the WPC plastic wood sound barrier screen, and limit the pressure ring 205 through multiple buckles so that its bottom is pressed on the top of the WPC plastic wood sound barrier screen, ensuring that the bottom of the WPC plastic wood sound barrier screen is tightly fitted with the top of the No. 1 rubber pad 204;

[0105] Compression test of the WPC plastic wood sound barrier screen: set the downward pressure parameters of the oil cylinder 302 through the computer 600, and extend the output rod of the oil cylinder 302 downward so that its bottom applies downward pressure to the top of the WPC plastic wood sound barrier screen. After maintaining the downward pressure on the top of the WPC plastic wood sound barrier screen for 15 seconds, the output rod of the oil cylinder 302 resets upward;

[0106] Inspection of the WPC plastic wood sound barrier screen after the pressure test: lift the box body 402 upwards through the output rod of the cylinder 401, driving the coupling plate 403, the second rubber pad 4021, the air guide box 405, etc. to move. When the top of the second rubber pad 4021 is tightly in contact with the bottom of the WPC plastic wood sound barrier screen, the cylinder 401 is closed and stops lifting the box body 402 upwards, so that the top of the second rubber pad 4021 remains in contact with the bottom of the WPC plastic wood sound barrier screen. The vacuum pump 4013 is operated to generate negative pressure suction, and the suction is transmitted to the coupling plate 403 through the air pipe 4014, and then transmitted to the guide box 405 through the drainage port 408. The inside of the air box 405 and the inside of the area at the bottom of the corrugated diaphragm 4010, since the air pressure at the bottom of the corrugated diaphragm 4010 is less than the air pressure at its top, the corrugated diaphragm 4010 drives the pressure column 4011 downward to move, and due to the abutment between the top of the No. 2 rubber pad 4021 and the bottom of the WPC plastic wood sound barrier screen body, the bottom of the WPC plastic wood sound barrier screen body forms a closed cavity through the No. 2 rubber pad 4021 and the inside of the partition chamber 404, the inside of the air guide box 405 and the top area of ​​the corrugated diaphragm 4010. Therefore, during the downward extension of the corrugated diaphragm 4010, negative pressure is also generated in the top area of ​​the corrugated diaphragm 4010 The effect is to inhibit the corrugated diaphragm 4010 from continuing to stretch downward. That is to say, the corrugated diaphragm 4010 stops stretching after stretching downward for a certain distance. Therefore, the bottom of the pressure column 4011 does not contact the top of the in-place switch 409. During the downward stretching process of the corrugated diaphragm 4010 near the crack position of the WPC plastic wood sound barrier screen, the negative pressure inside the top area of ​​the corrugated diaphragm 4010 will pass through the cracks of the WPC plastic wood sound barrier screen and inhale the air on the top of the WPC plastic wood sound barrier screen into the interior of the partition chamber 404 and the air guide box 405, thereby replenishing the air pressure inside the partition chamber 404 and the air guide box 405. Therefore, the corrugated diaphragm 4010 at this position continues to stretch downward under the action of the negative pressure at its bottom, and continues to push the pressure column 4011 downward until the bottom of the pressure column 4011 contacts the top of the in-place switch 409. The in-place switch 409 transmits a signal to the computer 600, so that the computer 600 can obtain the crack position, and start the X-axis translation component 502 and the Y-axis translation component 504 according to the signal provided by the in-place switch 409, driving the connecting plate 505 and the ultrasonic detection head 506 to move quickly to the crack position, without the need to perform an overall scan of the top of the WPC plastic wood sound barrier screen, saving test time and improving test efficiency.

[0107] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A WPC plastic wood sound barrier screen body compression test equipment, characterized by: include: base(100); The support unit (200) is fixedly arranged on the top of the base (100) and is used to support the WPC plastic wood sound barrier screen body. The support unit (200) includes: Support uprights (201) are fixedly mounted on the top of the base (100) in a left-right arrangement; A support frame (202) is fixedly mounted on the top of the left and right support vertical plates (201); The placement groove (203) is formed on the top of the support frame (202) and extends to the interior of the support frame (202); A number one rubber pad (204) is fixedly mounted on the bottom of the placement groove (203), wherein the top of the number one rubber pad (204) is 2 to 2.5 mm higher than the top of the support frame (202); A pressing ring (205) is fixedly mounted on the top of the support frame (202) through a plurality of buckles, and the specifications of the pressing ring (205) are compatible with the specifications of the No. 1 rubber pad (204); A pressure testing unit (300) is fixedly arranged on the top of the base (100) and located on one side of the support unit (200), and is used to apply pressure to the top of the WPC plastic wood sound barrier screen body; The crack locating unit (400) is fixedly arranged on the top of the base (100) and located inside the supporting unit (200), and is used for locating cracks in the WPC plastic wood sound barrier screen body. The crack locating unit (400) comprises: The cylinder (401) is fixedly mounted on the top of the base (100) in a square shape and is located between the left and right support plates (201); The box (402) is fixedly mounted on the top of the output rods of the plurality of cylinders (401); A coupling plate (403) is fixedly mounted on the upper portion of the inner wall of the box (402); The partition chamber (404) is provided on the top of the coupling plate (403) in a vertical and horizontal distribution; The air guide box (405) is fixedly mounted on the bottom of the partition chamber (404) in a vertical and horizontal distribution manner; A through hole (406) is provided through the middle of the bottom of the air guide box (405); An air cylinder (407) is fixedly mounted on the bottom of the air guide box (405) and is located outside the opening of the through hole (406); A drainage port (408) is provided through the lower portion of the outer wall of the air cylinder (407); An in-position switch (409) is fixedly mounted on the bottom of the gas cylinder (407) and extends into the interior of the gas cylinder (407); The corrugated diaphragm (4010) is located inside the gas cylinder (407), and the outer wall of the corrugated diaphragm (4010) is in contact with the inner wall of the gas cylinder (407); A pressure column (4011) is fixedly mounted on the bottom of the corrugated diaphragm (4010) and is located directly above the in-position switch (409), wherein the bottom of the pressure column (4011) and the top of the in-position switch (409) are in clearance fit; The crack locating unit (400) further comprises: An air guide hole (4012) is provided through the bottom of the box body (402); A vacuum pump (4013) is fixedly mounted on the top of the base (100); The air pipe (4014) is fixedly installed between the bottom of the air guide hole (4012) and the output end of the vacuum pump (4013); The crack locating unit (400) further comprises: A second rubber pad (4021) is fixedly mounted on the top of the coupling plate (403); The square notches (4022) are provided on the top of the second rubber pad (4021) in a vertical and horizontal distribution, and the specifications and positions of the square notches (4022) are adapted to the specifications and positions of the partition chamber (404); An ultrasonic detection unit (500) is fixedly arranged on the top of the base (100) and is used to measure the size of cracks in the WPC plastic wood sound barrier screen; The computer (600) is fixedly mounted on the surface of the pressure testing unit (300).

2. The WPC plastic wood sound barrier screen body compression test equipment according to claim 1 is characterized by: The pressure testing unit (300) comprises: A stand (301) is fixedly mounted on one end of the top of the base (100); The oil cylinder (302) is fixedly mounted on the side of the platform (301), and the oil cylinder (302) is located directly above the supporting unit (200).

3. The WPC plastic wood sound barrier screen body compression test equipment according to claim 2 is characterized by: The crack locating unit (400) further comprises: A sliding hoop (4015) is slidably mounted on the inner wall of the gas cylinder (407), wherein the top of the sliding hoop (4015) is fixedly connected to the bottom edge of the corrugated diaphragm (4010); A No. 1 spring (4016) is fixedly mounted on the bottom of the sliding hoop (4015); A limit stop ring (4017) is fixedly mounted on the inner wall of the air cylinder (407), wherein the top of the limit stop ring (4017) is fixedly connected to the bottom of the first spring (4016); The corrugated retaining strips (4018) are fixedly mounted on the inner wall of the limit retaining ring (4017) in a circular array.

4. The WPC plastic wood sound barrier screen body compression test equipment according to claim 3 is characterized by: The crack locating unit (400) further comprises: A reset top plate (4019) is fixedly mounted on the outer wall of the pressure column (4011); The second spring (4020) is located outside the pressure column (4011) and is fixedly installed between the bottom of the reset top plate (4019) and the bottom wall of the air cylinder (407). The elastic force of the second spring (4020) is smaller than the elastic force of the first spring (4016).

5. The WPC plastic wood sound barrier screen body compression test equipment according to claim 4 is characterized by: The ultrasonic detection unit (500) comprises: A support frame (501) is fixedly mounted on the top rear end of the base (100) in parallel with the front and rear ends; An X-axis translation component (502) is fixedly mounted on the top of the front and rear support frames (501); A translation frame (503) is fixedly mounted on the top of the moving end of the X-axis translation component (502); A Y-axis translation component (504) is fixedly mounted on the top wall of the translation frame (503); A connecting plate (505) is fixedly mounted on the bottom of the moving end of the Y-axis translation component (504); The ultrasonic detection head (506) is fixedly mounted on the bottom of the connecting plate (505).

6. The compression test process of the WPC sound barrier screen compression test equipment according to claim 5 is characterized by: The following steps are included: S1. Place the WPC plastic wood sound barrier screen body on the top of the support unit (200), fix the pressure ring (205) to the top edge of the WPC plastic wood sound barrier screen body by means of a buckle, and position the WPC plastic wood sound barrier screen body; S2, the pressure test unit (300) applies downward pressure to the top of the WPC plastic wood sound barrier screen to perform a pressure test; S3, the cylinder (401) pushes the box (402) and the coupling plate (403) upwards to move the top of the second rubber pad (4021) against the bottom of the WPC plastic wood sound barrier screen; S4, the vacuum pump (4013) is started to suck the air inside the box (402) through the air pipe (4014) and the air inside the air cylinder (407) located at the bottom area of ​​the corrugated diaphragm (4010) through the drainage port (408), thereby causing negative pressure inside the box (402) and the air cylinder (407), so that the corrugated diaphragm (4010) has the potential energy to stretch downward; S5. The corrugated diaphragm (4010) has the potential energy to stretch downward, causing negative pressure inside the air guide box (405) and the partition chamber (404). The bottom of the WPC plastic wood sound barrier screen is sucked downward through the partition chamber (404). The negative pressure inside the air guide box (405) near the cracked part of the WPC plastic wood sound barrier screen is sucked into the interior of the air guide box (405) through the crack of the WPC plastic wood sound barrier screen, gradually balancing the pressure difference between the top and bottom of the corrugated diaphragm (4010). The corrugated diaphragm (4010) continues to stretch downward, driving the pressure column (4011) to move together until the bottom of the pressure column (4011) contacts the top of the in-place switch (409). However, the negative pressure inside the air guide box (405) and the partition chamber (404) in the area where the WPC plastic wood sound barrier screen has no cracks cannot be compensated. Therefore, after the corrugated diaphragm (4010) in this area stretches downward for a distance, under the action of the negative pressure at its upper end, the corrugated diaphragm (4010) cannot continue to move downward, and the pressure column (4011) at its bottom will not contact the top of the in-place switch (409); S6. The bottom of the pressure column (4011) contacts the top of the in-position switch (409) to generate an electrical signal which is transmitted to the computer (600), thereby controlling the movement of the X-axis translation component (502) and the Y-axis translation component (504), thereby driving the connecting plate (505) and the ultrasonic detection head (506) to move to the crack position for crack detection.

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