Compression resistance experiment equipment for plywood production quality detection

Abstract

The invention discloses compressive property experimental equipment for plywood production quality detection, and relates to the technical field of plate detection, the compressive property experimental equipment comprises an equipment main body, a hydraulic device is mounted on the equipment main body corresponding to the position above an operation area, a hydraulic rod is mounted at the output end of the hydraulic device, and a pressure block is fixedly mounted at the bottom of the hydraulic rod; when the equipment is used and cracks appear at the bottom of the plywood, the blade-shaped clamping strips on the moving belts can be buckled at the cracks, so that the moving belts are blocked from moving, the moving belts can drive the clamping rods to move out of the clamping holes through the buckling pieces, and the clamping rods can move out of the clamping holes through the clamping pieces. By arranging the auxiliary push rod, the push plate does not move due to the movement of the auxiliary push rod any more, so that the lower piston block does not move due to pressure any more, the observation piece in the observation cavity is unbalanced due to pressure and inclines, and the crack generation condition of the plywood can be effectively identified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate detection, and in particular to a compression resistance experiment equipment for plywood production quality detection. BACKGROUND

[0002] As a core category of man-made boards, plywood is widely used in fields such as construction, furniture, and packaging. After production, the plywood usually needs to be sampled and detected, and the detection content includes compression resistance detection.

[0003] In the compression resistance detection, a specified pressure is usually applied according to the material and other related requirements of the plywood. In this process, the plywood is placed on a support and subjected to pressure from a hydraulic device, and then deformation occurs. When the quality of the plywood is unqualified, the plywood will break under a fixed pressure.

[0004] In the actual detection process, the breaking of the plywood is obvious and can be directly observed without additional auxiliary observation. However, the quality of some plywood is at the critical point of being qualified, so it does not break obviously, but it has cracks. It is difficult to observe some cracks, especially the color paint on the surface of some plywood, which directly affects the observation results, so it is difficult to quickly determine whether the plywood meets the requirements. Therefore, the present application provides a compression resistance experiment equipment for plywood production quality detection to solve the above problems. SUMMARY

[0005] The present application aims to provide a compression resistance experiment equipment for plywood production quality detection to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A compression resistance experiment equipment for plywood production quality detection, comprising a device main body, a hydraulic device installed above the corresponding work area on the device main body, a hydraulic rod installed on the output end of the hydraulic device, a pressure block fixedly installed at the bottom of the hydraulic rod, a support installed on both sides of the bottom of the device main body corresponding to the work area, a placing groove for placing the plywood opened at the top of the support, a pressure sensing assembly installed between the two groups of supports, a downward pressure transmission assembly installed at the bottom of the inner side of the device main body, the downward pressure transmission assembly and the pressure sensing assembly corresponding to each other and connected to each other, the position of the pressure sensing assembly corresponding to the position of the pressure block, a upward pressure transmission assembly installed on the hydraulic rod, an observation assembly installed on the side wall of the device main body, the top trigger end of the observation assembly corresponding to the upward pressure transmission assembly, and the side wall trigger end of the observation assembly corresponding to the output end of the downward pressure transmission assembly.

[0008] As a further embodiment of the present invention, the pressure sensing component includes a contact element and a conductive element. The contact element is installed between two sets of supports, and the conductive element is installed at the bottom of the working area on the main body of the device and corresponds to the contact element. The contact element includes a support strip, which is fixedly installed on both sides of the corresponding placement slots on the two sets of supports. The interior of the two sets of supports is hollow, and the hollow area inside the supports penetrates the top area of ​​the two sets of supports on one side close to each other. The penetrating area inside the supports is located below the support strip. A movable shaft is installed inside the support on the side of the support away from the observation component. A movable belt is wound around the movable shaft via a torsion spring. Movable rollers are movably installed at the top of the inner part of each bracket. The movable belt is transported to the bracket near the observation component. The area between the two sets of brackets corresponding to the movable belt is located below the support bar. The bottom of the conductor and the support bar are in contact with each other, and the conductor is located on both sides of the movable belt. The conductor and the end of the movable belt away from the movable shaft are connected to the downward transmission component. An auxiliary groove is opened on the side of the movable belt near the support bar. The inner side of the auxiliary groove is equipped with spaced-apart clips. The clips are composed of spaced-apart scrapers, and the top of the scrapers is blade-shaped.

[0009] As a further embodiment of the present invention, the conductive component includes a tray with a U-shaped top. The top of the U-shaped end of the tray is respectively attached to the bottom of two sets of support strips, and the moving belt is located in the U-shaped groove on the tray. A return spring is fixedly installed at the bottom of the tray, and the bottom of the return spring is installed on the working bottom of the equipment body. The end of the tray away from the support strips passes through the equipment body and is connected to the downward transmission component inside the equipment body.

[0010] As a further embodiment of the present invention, the pressure transmission assembly includes a pressure adapter tube, which is an "L"-shaped tube filled with gas. Both ends of the pressure adapter tube are sealed by piston components. The piston component at the top of the pressure adapter tube is connected to the conductive component. An auxiliary push rod is fixedly installed on the piston component at the side end of the pressure adapter tube. A movable groove is opened inside the main body of the device near the observation component. The end of the auxiliary push rod away from the pressure adapter tube extends through the side wall of the main body of the device and into the movable groove.

[0011] As a further embodiment of the present invention, a base plate is fixedly installed on the side wall of the auxiliary push rod. An adjusting spring is fixedly installed on the end of the base plate near the pressure transfer tube. The end of the adjusting spring away from the base plate is installed on the inner wall of the moving groove. A push plate is provided on the end of the base plate away from the adjusting spring. The interior of the bracket penetrates the main body of the device and communicates with the moving groove. A buckle is installed on the top of the push plate. The buckle and the contact are connected to each other. A through groove is opened on the side wall of the push plate. The end of the auxiliary push rod away from the pressure transfer tube extends into the through groove. A locking hole is opened on the top of the through groove. A locking rod is fixedly installed at the bottom of the buckle corresponding to the locking hole position. The end of the locking rod away from the buckle extends into the locking hole.

[0012] As a further embodiment of the present invention, a blocking plate is provided on the push plate away from the substrate. The blocking plate is mounted on the push plate via a connecting rod. A hydraulic channel is provided inside the main body of the device corresponding to one end of the observation component. A main push block is installed inside the hydraulic channel near the blocking plate. A lower extrusion plate is fixedly installed on the end of the main push block near the blocking plate. The end of the lower extrusion plate away from the main push block is fixedly installed on the blocking plate. The hydraulic channel is filled with pressurized fluid, and the hydraulic channel and the observation component are interconnected.

[0013] As a further embodiment of the present invention, the observation assembly includes an observation box, an observation cavity is provided on the side wall of the observation box, a partition plate is vertically installed in the middle of the observation cavity, an observation component is installed inside the observation cavity, and an observation plate is installed at the inner and outer ends of the observation cavity.

[0014] As a further embodiment of the present invention, the observation box is provided with two sets of auxiliary pressure grooves. The auxiliary pressure grooves are located at the top of the side of the observation box near the main body of the equipment. The top of the inner side of the auxiliary pressure groove is provided with a pressure hole corresponding to the top of the observation cavity. The pressure hole and the auxiliary pressure groove are connected to each other. A push plate is installed at the bottom of the inner side of the auxiliary pressure groove.

[0015] As a further embodiment of the present invention, an upper pressure chamber is provided inside the observation box, which extends through the top of the observation box and corresponds to the position of the top pressure transmission component. The upper pressure chamber is also connected to one of the auxiliary pressure grooves. An upper piston block is installed at the top of the inner side of the upper pressure chamber and is located at the bottom of the top pressure transmission component. An auxiliary spring is fixedly installed at the bottom of the upper piston block. A transmission channel is also provided inside the observation box, which extends through the side wall of the observation box and corresponds to the output end of the lower pressure transmission component. A lower piston block is connected to another set of auxiliary pressure grooves. A lower piston block is installed in the transmission channel, and the size of the lower piston block is adapted to the size of the upper piston block. The distance from the lower piston block to the top of the transmission channel is adapted to the distance from the upper piston block to the bottom of the upper pressure chamber. The transmission channel is filled with pressurized fluid at the position corresponding to the bottom of the lower piston block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When the device of the present invention is in use, the pressure block is pressed down, causing the transmission component to transmit pressure to the pressure transmission component, which in turn drives the push plate to move. The push plate pulls the moving belt to move at the bottom of the plywood. When a crack appears at the bottom of the plywood, the blade-shaped clip on the moving belt will lock at the crack, thus obstructing the movement of the moving belt. The moving belt will drive the clip rod to move out of the clip hole through the clip, so that the push plate is no longer moved by the movement of the auxiliary push rod. As a result, the lower piston block will no longer be pressed and moved, which will cause the observation component in the observation chamber to be under pressure imbalance and tilt, thereby effectively identifying the plywood crack condition.

[0018] 2. When using the equipment of the present invention, the imbalance of the observation piece can be easily observed through the warning strip set on the observation plate, thereby quickly identifying whether the plywood is of substandard quality, without the need to directly observe the pressure condition of the plywood for judgment.

[0019] 3. When the device of the present invention is in use, the moving belt can be reset and wound on the movable shaft. When cracks appear in the plywood, the moving belt will drive the buckle to move out of the push plate. The moving belt will then rewind, thereby driving the push plate to move back. This will cause the lower piston block to press down in the transmission channel, which can more significantly reflect the pressure imbalance in the observation chamber. At the same time, due to the return of the push plate, even after the pressing operation is completed, the pressure imbalance can still be shown, thereby improving the identification effect of defective products. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a compressive strength testing device for testing the quality of plywood production.

[0021] Figure 2 This is a partial cross-sectional structural diagram of a contact component in a plywood production quality testing equipment for compressive strength testing.

[0022] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 4 This is a partial cross-sectional structural diagram of the main body of a plywood production quality testing equipment for compressive strength testing.

[0024] Figure 5 This is a partial longitudinal cross-sectional view of the pushing plate in a plywood production quality testing equipment for compressive strength testing.

[0025] Figure 6This is a schematic diagram of a partial cross-sectional view of the push plate in a plywood production quality testing equipment for compressive strength testing.

[0026] Figure 7 This is a schematic diagram of the rear-view partial split-section structure of the observation box in a test device for compressive strength of plywood production quality inspection.

[0027] Figure 8 This is a front-view partial split-section diagram of the observation box in a plywood production quality testing equipment for compressive strength testing.

[0028] Figure 9 This is a partial structural diagram of the observation component in a test device for compressive strength of plywood production quality inspection.

[0029] In the diagram: 1. Main body of the equipment; 2. Hydraulic equipment; 3. Hydraulic rod; 4. Pressure block; 5. Support; 6. Connecting plate; 7. Lifting groove; 8. Upper extrusion plate; 9. Support plate; 10. Return spring; 11. Observation box; 12. Observation chamber; 13. Divider plate; 14. Observation plate; 15. Warning strip; 16. Support strip; 17. Movable shaft; 18. Moving belt; 19. Movable roller; 20. Auxiliary groove; 21. Clamping strip; 22. Pressure adapter pipe; 23. Moving groove; 24. Push plate; 25. Base plate; 26. Adjusting spring; 27. 28. Baffle plate; 29. ​​Hydraulic channel; 30. Transmission channel; 31. Main push block; 32. Lower extrusion plate; 33. Through groove; 34. Auxiliary push rod; 35. Mounting groove; 36. Clamping plate; 37. Stop bar; 38. Return spring; 39. Clamping rod; 40. Clamping hole; 41. Auxiliary pressure groove; 42. Pressure hole; 43. Upper piston block; 44. Upper pressure chamber; 45. Auxiliary spring; 46. Push plate; 47. Balance plate; 48. Lower piston block; 49. Base bar; 50. Connecting groove; 51. Connecting belt; 52. Central shaft; 53. Sealing plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-9In this embodiment of the invention, a compressive strength test device for plywood production quality testing includes a main body 1, a hydraulic device 2 installed on the main body 1 at a position above the working area, a hydraulic rod 3 installed on the output end of the hydraulic device 2, a pressure block 4 fixedly installed at the bottom of the hydraulic rod 3, and brackets 5 installed on both sides of the bottom of the working area on the main body 1, with a placement groove for placing plywood on the top of the bracket 5.

[0032] See Figures 1-4 As shown, a pressure sensing component is installed between the two sets of supports 5. A downward transmission component is installed on the inner bottom of the main body 1. The downward transmission component and the pressure sensing component correspond to each other and are connected to each other. The positions of the pressure sensing component and the pressure block 4 correspond to each other. The hydraulic device 2 is activated to drive the pressure block 4 to press down, so that the pressure block 4 and the pressure sensing component come into contact and squeeze the pressure sensing component. After the pressure sensing component is compressed, it will drive the downward transmission component to make corresponding adjustments. A top pressure transmission component is installed on the hydraulic rod 3. An observation component is installed on the side wall of the main body 1. The top trigger end of the observation component corresponds to the top pressure transmission component. The side wall trigger end of the observation component... Corresponding to the output end of the downward transmission component, after the pressure block 4 and the pressure sensing component come into contact, the top pressure transmission component will come into contact with the top trigger end of the observation component. As the pressure block 4 descends, it will press down on the trigger end of the top of the observation component. At the same time, the pressure sensing component will adjust the downward transmission component. At this time, the downward transmission component adjusts and squeezes the trigger end of the side wall of the observation component to trigger. Subsequently, the observation element in the observation component is subjected to balanced forces from two directions and thus reaches a balanced state. When the plywood breaks or cracks, the pressure sensing component will jam, and the adjustment of the downward transmission component will stop, causing the observation element in the observation component to be unbalanced under pressure and thus tilted.

[0033] The pressure sensing component includes a contact element and a conductive element. The contact element is installed between two sets of brackets 5, and the conductive element is installed at the bottom of the working area on the main body 1 of the equipment and corresponds to the contact element.

[0034] See Figures 1-3As shown, the contact element includes a support strip 16, which is fixedly installed on both sides of the corresponding placement slots on the two sets of brackets 5. The support strip 16 is made of a flexible material, including but not limited to rubber. The interior of the two sets of brackets 5 is hollow, and the hollow area inside the bracket 5 penetrates the top area of ​​the two sets of brackets 5 on one side close to each other. The penetrating area inside the bracket 5 is located below the support strip 16. A movable shaft 17 is installed inside the bracket 5 on the side away from the observation component. A movable belt 18 is wound around the movable shaft 17 by a torsion spring. The movable belt 18 can be reset and wound around the movable shaft 17 by the torsion force of the torsion spring. Movable rollers 19 are movably installed at the top of each of the two sets of brackets 5. The moving belt 18 is transmitted sequentially through the movable rollers 19, the through holes on the side walls of the two sets of brackets 5, and the movable rollers 19 in another set of brackets 5 to the bracket 5 near the observation component. The moving belt 18 can be bent but not stretched. The material of the moving belt 18 includes, but is not limited to, polyester fiber, nylon, etc. The area between the two sets of brackets 5 corresponding to the moving belt 18 is located below the support bar 16. The bottom of the conductor and the support bar 16 are in contact with each other, and the conductor is located on both sides of the moving belt 18. The conductor and the end of the moving belt 18 away from the movable shaft 17 are connected to the downward transmission component.

[0035] The moving belt 18 has an auxiliary groove 20 on the side near the support strip 16. The inner side of the auxiliary groove 20 is equipped with a locking strip 21 at intervals. The locking strip 21 is composed of scraping blocks arranged at intervals, and the top of the scraping block is blade-shaped.

[0036] When the plywood is bent, the surface of the plywood is relatively smooth. At this time, the moving belt 18 can drive the clamping strips 21 to move at the bottom of the plywood. When the plywood has cracks, when the moving belt 18 is moving, the top of a set of scrapers on one set of clamping strips 21 will get stuck in the crack or be blocked by the crack, so that the moving belt 18 can no longer move, thereby controlling the downward transmission component for adjustment.

[0037] The transmission component includes a tray 9, the top of which is U-shaped. The top of the U-shaped end of the tray 9 is in contact with the bottom of two sets of support strips 16 respectively, and the moving belt 18 is located in the U-shaped groove on the tray 9. A return spring 10 is fixedly installed at the bottom of the tray 9. The bottom of the return spring 10 is installed on the working bottom of the equipment body 1. The end of the tray 9 away from the support strips 16 passes through the equipment body 1 and is connected to the downward transmission component inside the equipment body 1.

[0038] See Figures 4-6As shown, the pressure transmission assembly includes a pressure transfer tube 22, which is an "L"-shaped tube filled with gas. Both ends of the pressure transfer tube 22 are sealed by pistons. The piston at the top of the pressure transfer tube 22 is connected to the conductor. Specifically, the piston at the top of the pressure transfer tube 22 is connected to the bottom of the support plate 9. An auxiliary push rod 33 is fixedly installed on the piston at the side of the pressure transfer tube 22. A moving groove 23 is opened inside the main body 1 near the observation component. The end of the auxiliary push rod 33 away from the pressure transfer tube 22 extends through the side wall of the main body 1 into the moving groove 23. A base plate 25 is fixedly installed on the side wall of the auxiliary push rod 33. An adjusting spring 26 is fixedly installed on the end of the base plate 25 near the pressure transfer tube 22. The end of the adjusting spring 26 away from the base plate 25 is installed on the inner wall of the moving groove 23. A push plate 24 is provided on the end of the base plate 25 away from the adjusting spring 26. The position of the push plate 24 corresponds to the bracket 5 near the observation component.

[0039] Furthermore, the interior of the bracket 5 penetrates the main body 1 of the equipment and is interconnected with the moving groove 23. A buckle is installed on the top of the push plate 24, and the buckle and the contact are connected to each other. Specifically, the buckle and the end of the moving belt 18 away from the movable shaft 17 are connected to each other. A through groove 32 is opened on the side wall of the push plate 24. The position of the through groove 32 corresponds to the position of the auxiliary push rod 33. The end of the auxiliary push rod 33 away from the pressure transfer pipe 22 extends into the through groove 32. A locking hole 39 is opened on the top of the through groove 32. A locking rod 38 is fixedly installed at the bottom of the buckle corresponding to the locking hole 39. The end of the locking rod 38 away from the buckle extends into the locking hole 39.

[0040] When the support strip 16 is bent downwards under pressure, the pressure is transmitted to the support plate 9. Through the support plate 9 and the pressure transfer pipe 22, the auxiliary push rod 33 moves away from the pressure transfer pipe 22, which in turn drives the push plate 24 to move in the moving groove 23. The fastener can pull the moving belt 18 to move at the bottom of the plywood. When a crack appears at the bottom of the plywood, the fastener 21 prevents the moving belt 18 from moving. At this time, the push plate 24 will continue to move, which will cause the moving belt 18 to pull the fastener for adjustment. At this time, the fastener will move upwards in the push plate 24, thereby driving the lever 38 to move out of the locking hole 39. At this time, the push plate 24 will not move synchronously with the auxiliary push rod 33.

[0041] A baffle plate 27 is provided on the push plate 24 away from the base plate 25. The baffle plate 27 is installed on the push plate 24 via a connecting rod. A hydraulic channel 28 is provided inside the main body 1 corresponding to one end of the observation component. A main push block 30 is installed inside the hydraulic channel 28 near the baffle plate 27. The main push block 30 can move within the hydraulic channel 28. A lower extrusion plate 31 is fixedly installed on the end of the main push block 30 near the baffle plate 27. The end of the lower extrusion plate 31 away from the main push block 30 is fixedly installed on the baffle plate 27. The hydraulic channel 28 is filled with pressurized fluid, and the hydraulic channel 28 and the observation component are interconnected. The movement of the baffle plate 27 will drive the main push block 30 to move within the hydraulic channel 28, causing the main push block 30 to extrude the pressurized fluid within the hydraulic channel 28. This causes the pressurized fluid to be transmitted to the observation component, thereby adjusting the pressure within the observation component.

[0042] The fastener includes a mounting groove 34, which is located on the top of the push plate 24. A retaining plate 35 is provided on the bottom inner side of the mounting groove 34. A return spring 37 is fixedly installed at both ends of the bottom of the retaining plate 35. The return spring 37 supports the retaining plate 35 and drives it to reset after adjustment. A stop bar 36 is fixedly installed on both sides of the inner side of the mounting groove 34. The stop bar 36 can prevent the retaining plate 35 from rising in the mounting groove 34. When the moving belt 18 is blocked, the moving belt 18 will pull the retaining plate 35 past the stop bar 36. The bottom of the stop bar 36 is fixedly connected to the retaining rod 38. When the retaining plate 35 moves upward, it will drive the retaining rod 38 to move out of the retaining hole 39, thereby controlling the movement of the push plate 24 and thus controlling the movement of the blocking plate 27.

[0043] See Figures 8-9 As shown, the observation assembly includes an observation box 11, an observation cavity 12 is provided on the side wall of the observation box 11, a partition plate 13 is vertically installed in the middle of the observation cavity 12, the partition plate 13 divides the inside of the observation cavity 12 into two pressure areas, an observation element is installed inside the observation cavity 12, and observation plates 14 are installed at the inner and outer ends of the observation cavity 12. The observation plates 14 are made of light-transmitting material, which can protect the inside of the observation cavity 12. At the same time, the observation plates 14 can seal the pressure areas on both sides of the observation cavity 12, and can also effectively observe the balance state of the observation element through the observation plates 14.

[0044] The observation box 11 has two sets of auxiliary pressure grooves 40 inside. The auxiliary pressure grooves 40 are located at the top of the side of the observation box 11 near the main body 1. The top of the inner side of the auxiliary pressure groove 40 is provided with a pressure hole 41 corresponding to the top of the observation cavity 12. The pressure hole 41 and the auxiliary pressure groove 40 are connected to each other. A push plate 45 is installed at the bottom of the inner side of the auxiliary pressure groove 40. The push plate 45 can be pressed and moved upward in the auxiliary pressure groove 40. The upward movement of the push plate 45 in the auxiliary pressure groove 40 will drive the air pressure in the auxiliary pressure groove 40 to be transmitted into the observation cavity 12. When the push plates 45 in the two sets of auxiliary pressure grooves 40 rise synchronously, the observation object is subjected to balanced pressure. When the push plates 45 in the two sets of auxiliary pressure grooves 40 do not rise synchronously, the observation object is subjected to unbalanced pressure, which will cause it to tilt.

[0045] An upper pressure chamber 43 is provided inside the observation box 11. The upper pressure chamber 43 extends through the top of the observation box 11, and the position of the upper pressure chamber 43 corresponds to the position of the top pressure transmission component. The upper pressure chamber 43 is connected to one of the auxiliary pressure grooves 40. An upper piston block 42 is installed at the top of the inner side of the upper pressure chamber 43. The upper piston block 42 is located at the bottom of the top pressure transmission component. An auxiliary spring 44 is fixedly installed at the bottom of the upper piston block 42. The auxiliary spring 44 can support the upper piston block 42. At the same time, the auxiliary spring 44 can drive the upper piston block 42 to reset after the pressure is applied.

[0046] The inner side of the observation box 11 is also provided with a transmission channel 29. The transmission channel 29 runs through the side wall of the observation box 11 and corresponds to the output end of the downward transmission component. Specifically, the transmission channel 29 and the hydraulic channel 28 are interconnected. The lower piston block 47 and another set of auxiliary pressure grooves 40 are interconnected. The lower piston block 47 is installed in the transmission channel 29. The lower piston block 47 can be adjusted in height within the transmission channel 29. The size of the lower piston block 47 is adapted to the size of the upper piston block 42. The distance from the lower piston block 47 to the top of the transmission channel 29 is adapted to the distance from the upper piston block 42 to the bottom of the upper pressure chamber 43. The transmission channel 29 is filled with pressurized fluid corresponding to the bottom position of the lower piston block 47. The pressurized fluid in the transmission channel 29 and the pressurized fluid in the hydraulic channel 28 are interconnected.

[0047] The hydraulic rod 3 drives the pressure block 4 to press down. When the pressure block 4 and the support bar 16 come into contact, both the top pressure transmission component and the bottom pressure transmission component will be triggered and pressure will be transmitted to the observation component, so that the upper piston block 42 and the lower piston block 47 are pressed and move synchronously, and respectively push the pressure in the upper pressure chamber 43 and the transmission channel 29, so that the observation component inside the observation chamber 12 is subjected to balanced pressure and remains balanced. When the plywood cracks, the moving belt 18 is blocked and stops moving, which in turn drives the buckle to adjust so that the push plate 24 stops moving, so that the lower piston block 47 is no longer pressed. At this time, the pressure of the observation component in the observation chamber 12 is unbalanced, which causes it to tilt.

[0048] The observation component includes a central axis 51, which is fixedly installed inside the observation cavity 12 at the position corresponding to the partition plate 13. A balance plate 46 is installed on the outer wall of the central axis 51 via a torsion spring. The two ends of the balance plate 46 extend into the pressure areas on both sides of the observation cavity 12. Sealing plates 52 are fixedly installed on the top and bottom sides of the balance plate 46 near the partition plate 13. The sealing plates 52 are capable of bending deformation and seal the movable connection area between the balance plate 46 and the central axis 51 to prevent the pressure areas on both sides of the observation cavity 12 from connecting. Typically, base strips 48 are fixedly installed on the inner side walls of the observation cavity 12 at the positions corresponding to the balance plate 46. A connecting groove 49 is provided on the side of the balance plate 46 near the base strip 48. A connecting belt 50 is fixedly installed in the connecting groove 49. One end of the connecting belt 50 away from the connecting groove 49 is fixedly installed on the base strip 48. The connecting belt 50 can bend and deform elastically. When the balance plate 46 rotates, the bending of the connecting belt 50 can seal the gap generated by the rotation, thereby preventing the air pressure in the observation cavity 12 from leaking.

[0049] Two sets of warning strips 15 are horizontally installed on the observation plate 14 corresponding to the position of the balance plate 46, and the balance plate 46 is located between the two sets of warning strips 15. The offset of the balance plate 46 can be observed through the two sets of warning strips 15. When the offset of the two ends of the balance plate 46 does not exceed the warning strips 15, it is in a normal offset, that is, the unavoidable pressure fluctuation and pressure deviation during the pressure application process. When the offset of the two ends of the balance plate 46 exceeds the warning strips 15, it means that the observation cavity 12 is in a state of pressure imbalance, which can directly express the condition of cracks in the plywood.

[0050] The top pressure transmission assembly includes a connecting plate 6 and a lifting groove 7. The lifting groove 7 is opened on the side wall of the main body 1 corresponding to the position of the observation assembly. The connecting plate 6 is fixedly installed on the hydraulic rod 3. The end of the connecting plate 6 away from the hydraulic rod 3 extends to the top position of the observation assembly through the lifting groove 7. The bottom of the connecting plate 6 is fixedly installed with an upper extrusion plate 8 corresponding to the observation assembly. Specifically, the position of the upper extrusion plate 8 corresponds to the position of the upper piston block 42. The distance between the upper extrusion plate 8 and the upper piston block 42 is adapted to the distance between the bottom of the pressure block 4 and the top of the support bar 16.

[0051] The working principle of this invention is:

[0052] In use, the plywood to be tested is mounted on two sets of supports 5. A CNC terminal inputs a specified command based on the pressure to be tested on the plywood, causing the hydraulic device 2 to drive the hydraulic rod 3 and pressure block 4 downwards. When the pressure block 4 presses down and contacts the plywood, the pressure causes the plywood to bend. Simultaneously, the plywood causes the support strip 16 to deform accordingly, causing the support plate 9 to press down. The pressing down of the support plate 9, through the pressure transfer pipe 22, causes the auxiliary push rod 33 to drive the push plate 24 to move within the moving groove 23. At this time, the movement of the push plate 24... The movement will stretch the moving belt 18 and push the baffle plate 27 to move. When the moving belt 18 is pulled, the position of the moving belt 18 corresponding to the bottom of the plywood will move at the bottom of the plywood. The movement of the baffle plate 27 will push the main push block 30 to move in the hydraulic channel 28 through the lower extrusion plate 31, so that the pressure fluid in the hydraulic channel 28 is transmitted to the observation component and pushes the lower piston block 47 to move. At the same time, the upper extrusion plate 8 will simultaneously extrude the upper piston block 42, so that the upper piston block 42 moves in the upper pressure chamber 43, thereby causing the two sets of auxiliary pressure grooves 40 to move. Synchronous pressure transmission within the cavity ensures the observation element within the observation chamber 12 is in equilibrium. When a crack appears at the bottom of the plywood, it blocks the locking strip 21, thus hindering the movement of the moving belt 18. This causes the moving belt 18 to raise the locking member within the push plate 24 (relative to the auxiliary push rod 33 pushing the push plate 24 to move). The locking member then moves the locking rod 38 upward and out of the locking hole 39. At this point, the auxiliary push rod 33 cannot move the push plate 24 synchronously; in fact, the winding of the moving belt 18 may cause the push plate 24 to move in the opposite direction. At this time, the upper extrusion plate 8 will continue to press down, but the blocking plate 27 will no longer move, so that the upper piston block 42 in the observation component will continue to move and apply pressure, while the lower piston block 47 will no longer move, causing the observation piece in the observation cavity 12 to be subjected to pressure imbalance. Even if the upper extrusion plate 8 does not continue to press down, the moving belt 18 will drive the push plate 24 to move in the opposite direction, which will drive the lower piston block 47 to descend in the transmission channel 29, which will also cause pressure imbalance in the observation cavity 12, and the imbalance and tilt of the observation piece can still be observed.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A compressive strength testing device for plywood production quality inspection, comprising a main body (1), wherein a hydraulic device (2) is installed on the main body (1) at a position above the working area, a hydraulic rod (3) is installed on the output end of the hydraulic device (2), a pressure block (4) is fixedly installed at the bottom of the hydraulic rod (3), and supports (5) are installed on both sides of the bottom of the working area on the main body (1), wherein the top of the supports (5) is provided with a placement groove for placing plywood, characterized in that: A pressure sensing component is installed between the two sets of brackets (5). A downward transmission component is installed on the inner bottom of the main body of the equipment (1). The downward transmission component and the pressure sensing component correspond to each other and are connected to each other. The positions of the pressure sensing component and the pressure block (4) correspond to each other. A top pressure transmission component is installed on the hydraulic rod (3). An observation component is installed on the side wall of the main body of the equipment (1). The top trigger end of the observation component corresponds to the top pressure transmission component. The side wall trigger end of the observation component corresponds to the output end of the downward transmission component.

2. The compressive strength testing equipment for plywood production quality inspection according to claim 1, characterized in that: The pressure sensing component includes a contact and a conductive component. The contact is installed between two sets of brackets (5). The conductive component is installed at the bottom of the working area on the main body (1) of the equipment and corresponds to the contact. The contact includes a support strip (16). The support strip (16) is fixedly installed on both sides of the corresponding placement slot on the two sets of brackets (5). The interior of the two sets of brackets (5) is hollow, and the hollow area inside the bracket (5) penetrates the top area of ​​the two sets of brackets (5) on one side close to each other. The through area inside the bracket (5) is located below the support strip (16). A movable shaft (17) is installed inside the bracket (5) on the side away from the observation component. A movable belt (18) is wound on the movable shaft (17) by a torsion spring. The top of each bracket (5) is movably mounted with a movable roller (19). The moving belt (18) is transmitted to the bracket (5) near the observation component. The area between the two brackets (5) is located below the support bar (16). The bottom of the conductor and the support bar (16) are in contact with each other, and the conductor is located on both sides of the moving belt (18). The conductor and the end of the moving belt (18) away from the movable shaft (17) are connected to the pressing transmission component. The moving belt (18) near the support bar (16) has an auxiliary groove (20). The inner side of the auxiliary groove (20) is equipped with a locking strip (21) at intervals. The locking strip (21) is composed of scrapers arranged at intervals. The top of the scraper is blade-shaped.

3. The compressive strength testing equipment for plywood production quality testing according to claim 2, characterized in that: The transmission component includes a tray (9), the top of which is "U" shaped. The top of the "U" end of the tray (9) is respectively attached to the bottom of two sets of support strips (16), and the moving belt (18) is located in the "U" groove on the tray (9). A return spring (10) is fixedly installed at the bottom of the tray (9). The bottom of the return spring (10) is installed on the working bottom of the equipment body (1). The end of the tray (9) away from the support strips (16) passes through the equipment body (1) and is connected to the downward transmission component inside the equipment body (1).

4. The compressive strength testing equipment for plywood production quality testing according to claim 1, characterized in that: The pressure transmission assembly includes a pressure adapter tube (22), which is an "L"-shaped tube. The inside of the pressure adapter tube (22) is filled with gas. Both ends of the pressure adapter tube (22) are sealed by piston components. The piston component at the top of the pressure adapter tube (22) and the conductive component are connected to each other. An auxiliary push rod (33) is fixedly installed on the piston component at the side end of the pressure adapter tube (22). A moving groove (23) is opened in the inside of the main body of the equipment (1) near the observation component. The end of the auxiliary push rod (33) away from the pressure adapter tube (22) extends through the side wall of the main body of the equipment (1) into the moving groove (23).

5. The compressive strength testing equipment for plywood production quality inspection according to claim 4, characterized in that: A base plate (25) is fixedly installed on the side wall of the auxiliary push rod (33). An adjusting spring (26) is fixedly installed on one end of the base plate (25) near the pressure transfer tube (22). The end of the adjusting spring (26) away from the base plate (25) is installed on the inner wall of the moving groove (23). A push plate (24) is provided on the end of the base plate (25) away from the adjusting spring (26). The interior of the bracket (5) penetrates the main body of the equipment (1) and communicates with the interior of the moving groove (23). A latching component is installed on the top of the push plate (24), and the latching component and the contact component are connected to each other. A through groove (32) is provided on the side wall of the push plate (24). The auxiliary push rod (33) extends into the through groove (32) at one end away from the pressure adapter pipe (22). A locking hole (39) is provided on the top of the through groove (32). A locking rod (38) is fixedly installed at the bottom of the latching component corresponding to the locking hole (39). The locking rod (38) extends into the locking hole (39) at one end away from the latching component.

6. The compressive strength testing equipment for plywood production quality inspection according to claim 5, characterized in that: A baffle plate (27) is provided on the push plate (24) away from the base plate (25). The baffle plate (27) is installed on the push plate (24) through a connecting rod. A hydraulic channel (28) is provided inside the main body of the device (1) at one end corresponding to the observation component. A main push block (30) is installed inside the hydraulic channel (28) on the side near the baffle plate (27). A lower extrusion plate (31) is fixedly installed on the side of the main push block (30) near the baffle plate (27). The lower extrusion plate (31) is fixedly installed on the baffle plate (27) at the side away from the main push block (30). The hydraulic channel (28) is filled with pressurized fluid, and the hydraulic channel (28) and the observation component are interconnected.

7. The compressive strength testing equipment for plywood production quality inspection according to claim 1, characterized in that: The observation assembly includes an observation box (11), an observation cavity (12) is provided on the side wall of the observation box (11), a partition plate (13) is vertically installed in the middle of the observation cavity (12), an observation component is installed inside the observation cavity (12), and an observation plate (14) is installed at the inner and outer ends of the observation cavity (12).

8. The compressive strength testing equipment for plywood production quality inspection according to claim 7, characterized in that: The observation box (11) has two sets of auxiliary pressure grooves (40) inside. The auxiliary pressure grooves (40) are located at the top of the side of the observation box (11) near the main body of the equipment (1). The top of the inner side of the auxiliary pressure groove (40) is provided with a pressure hole (41) corresponding to the top of the observation cavity (12). The pressure hole (41) and the auxiliary pressure groove (40) are connected to each other. A push plate (45) is installed on the bottom of the inner side of the auxiliary pressure groove (40).

9. The compressive strength testing equipment for plywood production quality inspection according to claim 8, characterized in that: The observation box (11) has an upper pressure cavity (43) inside, which extends through the top of the observation box (11). The position of the upper pressure cavity (43) corresponds to the position of the top pressure transmission component. The upper pressure cavity (43) is connected to one of the auxiliary pressure grooves (40). An upper piston block (42) is installed at the top of the inner side of the upper pressure cavity (43). The upper piston block (42) is located at the bottom of the top pressure transmission component. An auxiliary spring (44) is fixedly installed at the bottom of the upper piston block (42). The observation box (11) also has a transmission channel (29) inside. The transmission channel (29) runs through the side wall of the observation box (11) and corresponds to the output end of the lower pressure transmission component. The lower piston block (47) and another set of auxiliary pressure grooves (40) are interconnected. The lower piston block (47) is installed in the transmission channel (29). The size of the lower piston block (47) is adapted to the size of the upper piston block (42). The distance from the lower piston block (47) to the top of the transmission channel (29) is adapted to the distance from the upper piston block (42) to the bottom of the upper pressure chamber (43). The transmission channel (29) is filled with pressurized fluid at the bottom position corresponding to the lower piston block (47).

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