A strength loss detection device suitable for ancient murals

Abstract

The present invention belongs to the technical field of rock and soil strength detection, and specifically is a strength loss detection device suitable for ancient murals, comprising a hollow column; one end of the hollow column is connected to a hollow block, an electric telescopic rod is arranged in the hollow column, and a movable plate is fixedly installed at the output end of the electric telescopic rod; the movable plate is pushed by means of the output end of the electric telescopic rod, so that the movable plate drives the push rod to enter the connecting sleeve, and then pushes the steel needle to slide out of the first circular hole and penetrate into the mural, at this time, the first pressure sensor will detect the thrust of pushing the steel needle, and record the thrust of 1cm, 2cm and 3cm respectively, and then calculate the strength loss of the mural according to the thrust. Through the above-mentioned mechanism, the present application can penetrate the ground layer through the steel needle to achieve refined measurement of the strength of the ground layer, so as to complete the strength loss detection of the ancient murals.

Description

Technical Field

[0001] The invention belongs to the technical field of rock and soil strength detection, in particular to a strength loss detection device suitable for ancient murals. Background Art

[0002] Ancient murals can be divided into three categories: palace murals, ancient tomb murals and cave temple murals. Their general structure is basically the same, from the inside to the outside, they are the support, the ground layer and the pigment layer. The support of palace murals and ancient tomb murals is bricks and stones, and the support of cave temple murals is gravel (rock). The outside of the support is generally a ground layer made of sand, with a thickness of about 2cm-3cm. The exquisite ancient murals are painted on the ground layer, which is called the pigment layer. The pigment layer is the part that carries historical information, and it is also the most precious and fragile part. Its preservation status is closely related to the strength of the ground layer it is attached to. Therefore, the preservation status of the murals is usually evaluated by the strength loss of the ground layer.

[0003] However, the above technology has the following defects: in the current strength detection process of ancient murals, since the material of the ground layer is mainly sand, its inherent mechanical strength is low, the existing detection technology is difficult to adapt to this low-strength material, and at the same time, the structure of the ground layer is relatively thin, and the existing technology cannot achieve refined measurement of the strength loss of the ground layer. For this reason, the present invention provides a strength loss detection device suitable for ancient murals. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0005] The technical solution adopted by the present invention to solve its technical problem is: the strength loss detection device suitable for ancient murals described in the present invention comprises a hollow column; one end of the hollow column is connected to a hollow block, an electric telescopic rod is arranged in the hollow column, and a movable plate is fixedly installed on the output end of the electric telescopic rod; a first pressure sensor is arranged between the output end of the electric telescopic rod and the movable plate, and the first pressure sensor is used to measure the thrust of a steel needle piercing into the mural; a group of connecting sleeves are fixedly connected to the side of the hollow block away from the hollow column, and a first circular hole for the steel needle to pass through is opened on the side of the connecting sleeve away from the hollow block; a push rod is slidably connected to the side of the movable plate away from the electric telescopic rod, and the push rod is used to push the steel needle in the connecting sleeve, and a driving mechanism for driving the push rod to move is arranged on the movable plate.

[0006] Preferably, the driving mechanism includes a hollow elastic ring fixed on the electric telescopic rod, a pressure ring is fixedly connected to the output end of the electric telescopic rod, a first slide groove is provided on the movable plate, a first magnetic block which is magnetically attracted to the push rod is sealingly and slidably connected in the first slide groove, a connecting pipe is connected between the first slide groove and the elastic ring, a control valve is provided on the connecting pipe, a first spring is fixedly connected between a side of the first magnetic block close to the connecting pipe and an inner wall of the first slide groove, a first air outlet is provided on the side wall of the movable plate, and the first air outlet is located on a side of the first magnetic block away from the first spring.

[0007] Preferably, the connecting sleeve is rotatably connected to a rotating shaft at the inner wall away from the push rod, and the rotating shaft is fixedly connected to a connecting disk at one end close to the push rod. The connecting disk is provided with annularly evenly distributed storage holes, and the positions of the storage holes correspond to the first circular hole. The push rod is provided with avoidance holes corresponding to the storage holes, and a rotating mechanism for driving the rotating shaft to rotate is arranged in the connecting sleeve.

[0008] Preferably, the rotating mechanism includes a rotating groove opened on the side of the connecting disk away from the movable plate, the inner wall of the rotating groove is fixedly connected to the first connecting plate, the side of the first connecting plate close to the rotating shaft is sealed and rotatably connected to the rotating shaft, the side wall of the rotating shaft is fixedly connected to the second connecting plate, the side of the second connecting plate close to the rotating groove is sealed and rotatably connected to the rotating groove, the side wall of the connecting disk is provided with a second air outlet connected to the rotating groove, the outer wall of the connecting sleeve is provided with a second slide groove corresponding to the connecting disk, the second slide groove is sealingly and slidably connected with a push plate, the push plate and the inner wall of the second slide groove are fixedly connected, the push plate is fixedly connected to a group of connecting columns of different lengths between the push plate and the inner wall of the second slide groove, the side of the push plate away from the second spring is fixedly connected to a group of connecting columns of different lengths, and the rotating shaft is twisted with the inner wall of the connecting sleeve through a torsion spring.

[0009] Preferably, a connecting hole aligned with the first circular hole is provided on the side of the push rod close to the connecting sleeve, a movable groove connected to the connecting hole is provided in the push rod, a clamping block is slidably connected in the movable groove, an annular groove engaged with the clamping block is provided on the steel needle, and the side of the clamping block close to the steel needle is in the shape of an inclined surface.

[0010] Preferably, a fixing rod is fixedly connected to the top surface of the block, a third spring is fixedly connected between the top surface of the fixing rod and the inner wall of the movable groove, and a second magnetic block magnetically attracted to the fixing rod is fixedly connected to the inner wall of the connecting sleeve.

[0011] Preferably, a connecting groove is provided in the push rod, an air inlet hole connected to the connecting groove and the connecting hole is provided in the push rod, a gas injection assembly is provided in the connecting groove, a second pressure sensor is provided in the connecting groove, the second pressure sensor is used to measure the pressure of the injected gas, and a through hole is provided on the steel needle.

[0012] Preferably, the gas injection assembly comprises a movable disk sealingly and slidingly connected to the inner wall of the avoidance hole, the avoidance hole is communicated with the connecting groove, and a fourth spring is fixedly connected between the movable disk and the connecting groove.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention uses the output end of the electric telescopic rod to push the movable plate, so that the movable plate drives the push rod to enter the connecting sleeve, and then pushes the steel needle to slide out of the first circular hole and penetrate into the mural. At this time, the first pressure sensor will detect the thrust of pushing the steel needle, and record the thrust of 1cm, 2cm and 3cm respectively, and then calculate the strength damage of the mural according to the thrust. Through the above-mentioned mechanism, the present application can penetrate the ground layer with a steel needle, and can perform fine measurement of the strength of the ground layer to complete the strength loss detection of ancient murals.

[0015] 2. The present invention controls the output end of the electric telescopic rod to move toward the side away from the push plate. At this time, the pressure ring will squeeze the elastic ring, so that the gas in the elastic ring enters the first slide groove from the connecting pipe, and then pushes the first magnetic block to move. At this time, the first magnetic block will drive the push rod to move. After the push rod moves to a suitable position, the control valve is closed so that the gas in the first slide groove cannot flow back into the elastic ring. At this time, the first magnetic block can also set multiple gears for the retraction stroke of the electric telescopic rod. Each gear can correspond to the position of the push rod moving to a different connecting sleeve to ensure that the push rod can accurately move to the desired connecting sleeve. The first air outlet is used to discharge the gas in the first slide groove when the first magnetic block moves, so that the first magnetic block can move normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 is a stereogram of the detection device of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the hollow column and the hollow block in the present invention;

[0019] Figure 3 It is a partial structural schematic diagram of the movable plate in the present invention;

[0020] Figure 4 yes Figure 2 Schematic diagram of the local structure;

[0021] Figure 5 yes Figure 4 A magnified image of point A;

[0022] Figure 6 yes Figure 4 The enlarged view of point B;

[0023] Figure 7 It is a schematic diagram of the matching state of the steel needle and the avoidance hole in the present invention;

[0024] Figure 8 It is a structural schematic diagram of the card block in the present invention;

[0025] Fig. 9 It is a schematic diagram of the internal structure of the steel needle in the present invention;

[0026] Fig.10 It is a partial structural sectional view of the hollow block in the present invention.

[0027] In the figure: 1. hollow column; 2. hollow block; 3. connecting sleeve; 4. electric telescopic rod; 5. movable plate; 6. push rod; 7. first circular hole; 8. first pressure sensor; 9. elastic ring; 10. pressure ring; 11. connecting pipe; 12. first magnetic block; 13. first slide groove; 14. through hole; 15. steel needle; 16. connecting disk; 17. rotating shaft; 18. first connecting plate; 19. second connecting plate; 20. rotating groove; 21. second slide groove; 22. push plate; 23. connecting column; 24. connecting hole; 25. annular groove; 26. clamping block; 27. fixing rod; 28. second magnetic block; 29. ​​air inlet; 30. movable disk; 31. second pressure sensor; 32. connecting groove; 33. avoidance hole; 34. guide hole; 35. elastic ring; 36. pressure plate; 37. elastic block. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] Embodiment 1: Figures 1 to 9 As shown, a strength loss detection device suitable for ancient murals described in an embodiment of the present invention comprises a hollow column 1; one end of the hollow column 1 is connected to a hollow block 2, an electric telescopic rod 4 is arranged in the hollow column 1, and a movable plate 5 is fixedly installed at the output end of the electric telescopic rod 4; a first pressure sensor 8 is arranged between the output end of the electric telescopic rod 4 and the movable plate 5, and the first pressure sensor 8 is used to measure the thrust of a steel needle 15 pushed into the mural; a group of connecting sleeves 3 are fixedly connected to the side of the hollow block 2 away from the hollow column 1, and a first circular hole 7 for the steel needle 15 to pass through is opened on the side of the connecting sleeve 3 away from the hollow block 2; a push rod 6 is slidably connected to the side of the movable plate 5 away from the electric telescopic rod 4, and the push rod 6 is used to push the steel needle 15 in the connecting sleeve 3, and a driving mechanism for driving the push rod 6 to move is arranged on the movable plate 5;

[0030] When the present application detects the strength loss of ancient murals, the driving mechanism drives the push rod 6 to move so that the push rod 6 moves to the connecting sleeve 3 where the steel needle 15 is stored. By setting a plurality of connecting sleeves 3, a plurality of steel needles 15 can be stored, which is convenient for the subsequent replacement and use of the steel needles 15. Then, a suitable insertion position for the steel needle 15 is selected on the mural, and then the movable plate 5 is pushed with the help of the output end of the electric telescopic rod 4, so that the movable plate 5 drives the push rod 6 to enter the connecting sleeve 3, and then pushes the steel needle 15 to slide out of the first circular hole 7 and penetrate into the mural. At this time, the first pressure sensor 8 will detect the thrust of the steel needle 15, and record the thrust of 1cm, 2cm and 3cm respectively, and then calculate the strength loss of the mural according to the thrust. The present application can penetrate the ground layer with the steel needle 15 through the above-mentioned mechanism, and can achieve fine measurement of the strength of the ground layer to complete the strength loss detection of the ancient murals. Because the steel needle is relatively small, when the ground layer is detected, the damage to the ground layer can be minimized to achieve the effect of protecting the ancient murals.

[0031] The driving mechanism includes a hollow elastic ring 9 fixed on the electric telescopic rod 4, a pressure ring 10 is fixedly connected to the output end of the electric telescopic rod 4, a first slide groove 13 is provided on the movable plate 5, a first magnetic block 12 that is magnetically attracted to the push rod 6 is sealed and slidably connected in the first slide groove 13, a connecting pipe 11 is connected between the first slide groove 13 and the elastic ring 9, a control valve is provided on the connecting pipe 11, a first spring is fixedly connected between the side of the first magnetic block 12 close to the connecting pipe 11 and the inner wall of the first slide groove 13, and a first air outlet is provided on the side wall of the movable plate 5, and the first air outlet is located on the side of the first magnetic block 12 away from the first spring;

[0032] The control valve in the present application is in an open state under normal circumstances. When the push rod 6 needs to be moved, the output end of the electric telescopic rod 4 can be controlled to move to the side away from the movable plate 5. At this time, the pressure ring 10 will squeeze the elastic ring 9, so that the gas in the elastic ring 9 enters the first slide groove 13 from the connecting pipe 11, and then pushes the first magnetic block 12 to move. At this time, the first magnetic block 12 will drive the push rod 6 to move. After the push rod 6 moves to a suitable position, the control valve is closed so that the gas in the first slide groove 13 cannot flow back into the elastic ring 9. At this time, the position of the first magnetic block 12 will be limited. The above mechanism can achieve the effect of automatically adjusting the position of the push rod 6. At the same time, multiple gears can be set for the retraction stroke of the electric telescopic rod 4. Each gear can correspond to the push rod 6 moving to a position at a different connecting sleeve 3 to ensure that the push rod 6 can accurately move to the desired connecting sleeve 3. The first air outlet is used to discharge the gas in the first slide groove 13 when the first magnetic block 12 moves, so that the first magnetic block 12 can move normally.

[0033] The inner wall of the connecting sleeve 3 away from the push rod 6 is rotatably connected to a rotating shaft 17, and one end of the rotating shaft 17 close to the push rod 6 is fixedly connected to a connecting disk 16, and the connecting disk 16 is provided with annular storage holes evenly distributed, and the positions of the storage holes correspond to the first circular hole 7, and the push rod 6 is provided with avoidance holes 33 corresponding to the storage holes, and a rotating mechanism for driving the rotating shaft 17 to rotate is provided in the connecting sleeve 3;

[0034] Since the needle head of the steel needle 15 will be worn out during use, the steel needle 15 needs to be replaced after being used a certain number of times. This requires carrying the steel needle 15 with you, which makes it inconvenient to replace the steel needle 15, thereby affecting the efficiency of the strength detection of the ancient murals. At this time, the steel needle 15 can be passed through the first circular hole 7 and then reach the storage hole. Then, the rotating shaft 17 is driven to rotate by the rotating mechanism, so that the next storage hole on the connecting disk 16 moves to the first circular hole 7, and then the steel needle 15 continues to be stored until all the storage holes have steel needles 15. 5, and then when the steel needle 15 needs to be replaced, the steel needle 15 that needs to be replaced can be directly taken away, and then the rotating shaft 17 is rotated with the help of the rotating mechanism, so that the connecting disk 16 drives the steel needles 15 on the remaining storage holes to move to the first circular hole 7, and then the new steel needle 15 is used. When the push rod 6 pushes the steel needle 15 corresponding to the first circular hole 7, the other steel needles 15 will enter the avoidance hole 33. Through the above mechanism, multiple steel needles 15 can be pre-stored and then replaced at any time, thereby greatly improving the convenience of using the detection device.

[0035] The rotating mechanism includes a rotating groove 20 opened on the side of the connecting plate 16 away from the movable plate 5, the side wall of the rotating groove 20 is fixedly connected with a first connecting plate 18 which is sealed and rotatably connected to the rotating shaft 17, the inner wall of the rotating groove 20 is fixedly connected with the first connecting plate 18, the side of the first connecting plate 18 close to the rotating shaft 17 is sealed and rotatably connected to the rotating shaft 17, the side wall of the rotating shaft 17 is fixedly connected with a second connecting plate 19, and the side of the second connecting plate 19 close to the rotating groove 20 is sealed and rotatably connected to the rotating groove 20. The side wall of the connecting plate 16 is provided with a second air outlet connected to the rotating groove 20, the outer side wall of the connecting sleeve 3 is provided with a second slide groove 21 which is connected to the connecting plate 16 correspondingly, the second slide groove 21 is sealed and slidably connected with a push plate 22, the push plate 22 is fixedly connected to the inner wall of the second slide groove 21 with a second spring, and the push plate 22 is fixedly connected with a group of connecting columns 23 of different lengths on the side away from the second spring, and the rotating shaft 17 is twisted with the inner wall of the connecting sleeve 3 through a torsion spring;

[0036] The second air outlet is used to discharge the gas in the rotating groove 20 pushed by the second connecting plate 19 to ensure that the second connecting plate 19 can rotate normally. When the push plate 22 slides with the second slide groove 21, resistance will be generated. When there is no manual push of the push plate 22, the push plate 22 will not move. When the application needs to drive the rotating shaft 17 to rotate, the shortest connecting column 23 can be pushed first, so that the connecting column 23 moves to a position aligned with the port of the second slide groove 21. At this time, the push plate 22 will push the gas in the second slide groove 21 into the rotating groove 20 from the air guide hole, thereby pushing the second connecting plate 19 to drive the rotating shaft 17 rotates, and the amount of gas entering at this time can push the rotating shaft 17 to rotate 60°, so that the rotating shaft 17 can drive the connecting plate 16 to rotate 60°, and then drive the steel needle 15 on the storage hole to move to the first circular hole 7, and by pushing the longer connecting column 23 again to reach a position aligned with the port of the second slide groove 21, the rotating shaft 17 can be rotated 60° again, so as to achieve the effect of accurately aligning the storage hole with the first circular hole 7, and it is also convenient for the rotation and replacement of the steel needle 15. When the rotating shaft 17 needs to be reset, you only need to pull the push plate 22 to reset it, and then the rotating shaft 17 will be reset under the action of the torsion spring.

[0037] A connecting hole 24 aligned with the first circular hole 7 is provided on the side of the push rod 6 close to the connecting sleeve 3, a movable groove connected to the connecting hole 24 is provided in the push rod 6, a clamping block 26 is slidably connected in the movable groove, an annular groove 25 clamped with the clamping block 26 is provided on the steel needle 15, and the side of the clamping block 26 close to the steel needle 15 is in the shape of an inclined surface; in the process of the push rod 6 pushing the steel needle 15 out of the first circular hole 7, the steel needle 15 will enter the connecting hole 24, and then push the inclined surface of the clamping block 26, The block 26 moves upward, and then when the end of the steel needle 15 close to the push rod 6 contacts the inner wall of the connecting hole 24, the block 26 will be aligned with the annular groove 25, and then the block 26 will move downward due to its weight and engage with the annular groove 25. After that, after the steel needle 15 is inserted into the mural, the steel needle 15 needs to be taken out of the mural. At this time, when the push rod 6 moves away from the mural, the block 26 will engage with the slot, which will drive the steel needle 15 to be pulled out of the mural, so as to achieve the effect of automatically inserting and pulling out the steel needle 15.

[0038] The top surface of the block 26 is fixedly connected with a fixing rod 27, and a third spring is fixedly connected between the top surface of the fixing rod 27 and the inner wall of the movable groove, and the inner wall of the connecting sleeve 3 is fixedly connected with a second magnetic block 28 which is magnetically attracted to the fixing rod 27; in the present application, after the push rod 6 drives the steel needle 15 to be pulled out from the mural, the push rod 6 continues to move to the side close to the movable plate 5, and the fixing rod 27 will move to the second magnetic block 28, so that the second magnetic block 28 and the fixing rod 27 are magnetically attracted, so that the fixing rod 27 drives the block 26 to disengage from the slot, and the push rod 6 continues to move. At this time, the steel needle 15 will no longer be clamped, and thus will no longer drive the push rod 6 to move, so as to prevent the block 26 from being always clamped with the slot, and the push rod 6 will drive the steel needle 15 to move, which will affect the use of the steel needle 15.

[0039] The push rod 6 is provided with a connecting groove 32, and the push rod 6 is provided with an air inlet 29 connected with the connecting groove 32 and the connecting hole 24. The connecting groove 32 is provided with a gas injection assembly, and the connecting groove 32 is provided with a second pressure sensor 31, and the second pressure sensor 31 is used to measure the pressure of the injected gas. The steel needle 15 is provided with a through hole 14; when the clamping block 26 is engaged with the clamping groove, the connecting hole 24 will be aligned with the through hole 14, and the steel needle 15 will fit tightly with the inner wall of the connecting hole 24, and then the steel needle 15 After penetrating 3 cm into the wall, gas is injected into the connecting hole 24 with the help of the injection assembly, so that the gas is injected into the mural through the through hole 14. At this time, the second pressure sensor 31 will detect the pressure of the gas injected into the mural to calculate the flow rate and pressure data of the gas inside the mural. The structure of the mural can be inferred. If there is a cavity, the flow of gas in the cavity will be different from the flow in the solid material, which means that the pressure data detected by piercing with the steel needle 15 cannot be used, because the hollow part cannot represent the strength of the ground layer.

[0040] The gas injection assembly includes a movable disk 30 which is sealingly and slidingly connected to the inner wall of the avoidance hole 33, the avoidance hole 33 is connected to the connecting groove 32, and a fourth spring is fixedly connected between the movable disk 30 and the connecting groove 32; when the steel needle 15 at the first circular hole 7 of the present application penetrates into the mural, the remaining steel needles 15 will enter the avoidance hole 33, and then the push rod 6 can be allowed to move 1cm-2cm closer to the connecting disk 16 again. At this time, the steel needle 15 in the avoidance hole 33 will push the movable disk 30, so that the gas in the avoidance hole 33 passes through the connecting disk 16 and the air inlet 29, and finally enters the through hole 14, and then is injected into the mural, so as to achieve the effect of automatically injecting gas into the mural through the above-mentioned mechanism.

[0041] Embodiment 2: Fig.10As shown, compared with Example 1, another implementation of the present invention is: the connecting sleeve 3 is provided with a mounting groove near the first circular hole 7, the inner wall of the mounting groove is fixedly connected with an elastic ring 35, and the inner wall of the elastic ring 35 is fixedly connected with bristles extending into the first circular hole 7; because the steel needle 15 will inevitably carry impurities after piercing into the mural, the bristles will contact the steel needle 15 when the steel needle 15 penetrates the first circular hole 7 through the above-mentioned mechanism, and then when the steel needle 15 is pulled out of the mural, the bristles will clean the impurities on the steel needle 15, thereby achieving the effect of self-cleaning of the steel needle 15.

[0042] The interior of the elastic ring 35 is a hollow structure, and the inner wall of the first circular hole 7 is twisted with a group of inclined pressure plates 36 through a torsion spring, and a hollow elastic block 37 is fixedly connected between the pressure plate 36 and the inner wall of the first circular hole 7. A guide hole 34 connected to the elastic block 37 and the elastic ring 35 is opened in the connecting sleeve 3; in the present application, when the steel needle 15 enters the first circular hole 7, the tapered end of the steel needle 15 will push the inclined pressure plate 36 to squeeze the elastic block 37, so that the gas in the elastic block 37 enters the elastic ring 35 from the guide hole 34, and the elastic ring 35 will expand at this time, so that the bristles can further fit with the steel needle 15 to improve the cleaning effect of the bristles on the steel needle 15.

[0043] Working principle: When the present application detects the strength loss of ancient murals, the driving mechanism drives the push rod 6 to move, so that the push rod 6 moves to the connecting sleeve 3 where the steel needle 15 is stored. By setting a plurality of connecting sleeves 3, a plurality of steel needles 15 can be stored, which is convenient for the subsequent replacement and use of the steel needles 15. Then, a suitable insertion position for the steel needle 15 is selected on the mural, and then the moving plate 5 is pushed with the help of the output end of the electric telescopic rod 4, so that the moving plate 5 drives the push rod 6 to enter the connecting sleeve 3, and then pushes the steel needle 15 to slide out of the first circular hole 7 and penetrate into the mural. At this time, the first pressure sensor 8 will detect the thrust of the steel needle 15, and record the thrust of 1cm, 2cm and 3cm respectively, and then calculate the strength loss of the mural according to the thrust. The present application can penetrate the ground layer through the steel needle 15 through the above mechanism, and can realize the refined measurement of the strength of the ground layer to complete the strength loss detection of the ancient murals; the control valve in the present application is in a state of normal operation. In the open state, when the push rod 6 needs to be moved, the output end of the electric telescopic rod 4 can be controlled to move to the side away from the moving plate 5. At this time, the pressure ring 10 will squeeze the elastic ring 9, so that the gas in the elastic ring 9 enters the first slide groove 13 from the connecting pipe 11, and then pushes the first magnetic block 12 to move. At this time, the first magnetic block 12 will drive the push rod 6 to move. After the push rod 6 moves to the appropriate position, the control valve is closed so that the gas in the first slide groove 13 cannot flow back into the elastic ring 9. At this time, the position of the first magnetic block 12 will be limited. The above mechanism can achieve the effect of automatically adjusting the position of the push rod 6. At the same time, multiple gears can be set for the retraction stroke of the electric telescopic rod 4. Each gear can correspond to the push rod 6 moving to the position of a different connecting sleeve 3 to ensure that the push rod 6 can accurately move to the desired connecting sleeve 3. The first air outlet is used to discharge the gas in the first slide groove 13 when the first magnetic block 12 moves, so that the first magnetic block 12 can move normally.

[0044] Since the needle head of the steel needle 15 will be worn out during use, the steel needle 15 needs to be replaced after being used a certain number of times. This requires carrying the steel needle 15 with you, which makes it inconvenient to replace the steel needle 15, thereby affecting the efficiency of the strength detection of the ancient murals. At this time, the steel needle 15 can be passed through the first circular hole 7 and then reach the storage hole. Then, the rotating shaft 17 is driven to rotate by the rotating mechanism, so that the next storage hole on the connecting disk 16 moves to the first circular hole 7, and then the steel needle 15 is stored again until all the storage holes have steel needles 15, and then the steel needles 15 are stored again. When the steel needle 15 needs to be replaced, the steel needle 15 to be replaced can be directly taken away, and then the rotating shaft 17 is rotated by means of the rotating mechanism, so that the connecting plate 16 drives the steel needles 15 on the remaining storage holes to move to the first circular hole 7, and then the new steel needle 15 is used. When the push rod 6 pushes the steel needle 15 corresponding to the first circular hole 7, the other steel needles 15 will enter the avoidance hole 33. Through the above mechanism, multiple steel needles 15 can be pre-stored and then replaced at any time, thereby greatly improving the convenience of using the detection device; the second air outlet is used to discharge the second connecting plate 19 to push the rotating groove 2 0, to ensure that the second connecting plate 19 can rotate normally. When the push plate 22 slides with the second slide groove 21, there will be resistance. This resistance will not move when there is no artificial push of the push plate 22. When the application needs to drive the rotating shaft 17 to rotate, the shortest connecting column 23 can be pushed first, so that the connecting column 23 moves to a position aligned with the port of the second slide groove 21. At this time, the push plate 22 will push the gas in the second slide groove 21 into the rotating groove 20 from the air guide hole, thereby pushing the second connecting plate 19 to drive the rotating shaft 17 to rotate. At this time, the push plate 22 will push the gas in the second slide groove 21 into the rotating groove 20 from the air guide hole, thereby pushing the second connecting plate 19 to drive the rotating shaft 17 to rotate. The amount of gas can push the rotating shaft 17 to rotate 60°, so that the rotating shaft 17 can drive the connecting plate 16 to rotate 60°, and then drive the steel needle 15 on the storage hole to move to the first circular hole 7. By pushing the longer connecting column 23 again to align with the port of the second slide groove 21, the rotating shaft 17 can be rotated 60° again, so as to achieve the effect of accurately aligning the storage hole with the first circular hole 7, and it is also convenient to rotate and replace the steel needle 15. When the rotating shaft 17 needs to be reset, it only needs to pull the push plate 22 to reset it, and then the rotating shaft 17 will be reset under the action of the torsion spring;

[0045] In the process of the push rod 6 pushing the steel needle 15 out of the first circular hole 7, the steel needle 15 will enter the connecting hole 24, and then push the inclined surface of the block 26, so that the block 26 moves upward, and then when the end of the steel needle 15 close to the push rod 6 contacts the inner wall of the connecting hole 24, the block 26 will align with the annular groove 25, and then the block 26 will move downward due to its weight and engage with the annular groove 25. After that, after the steel needle 15 is inserted into the mural, the steel needle 15 needs to be taken out of the mural. At this time, when the push rod 6 moves away from the mural, the block 26 will engage with the slot, which will drive the steel needle 15 to be pulled out of the mural. , so as to achieve the effect of automatically inserting and pulling out the steel needle 15; in the present application, after the push rod 6 drives the steel needle 15 to be pulled out from the mural, the push rod 6 continues to move to the side close to the movable plate 5, and at this time the fixed rod 27 will move to the second magnetic block 28, so that the second magnetic block 28 and the fixed rod 27 are magnetically attracted, so that the fixed rod 27 drives the clamping block 26 to disengage from the clamping slot, and the push rod 6 continues to move. At this time, the steel needle 15 will no longer be clamped, and thus will no longer drive the push rod 6 to move, so as to prevent the clamping block 26 from being always clamped with the clamping slot, and the push rod 6 will drive the steel needle 15 to move, which will affect the use of the steel needle 15;

[0046] In the present application, when the card block 26 is engaged with the card slot, the connecting hole 24 will be aligned with the through hole 14, and the steel needle 15 will fit tightly with the inner wall of the connecting hole 24. Then, after the steel needle 15 penetrates 3 cm into the wall, the connecting hole 24 is injected with gas by means of the injection assembly, so that the gas is injected into the mural through the through hole 14. At this time, the second pressure sensor 31 will detect the pressure of the gas injected into the mural to calculate the flow rate and pressure data of the gas inside the mural, and the structure of the mural can be inferred. If there is a cavity, the flow of gas in the cavity will be different from the flow in the solid material, which means that The pressure data detected by piercing the steel needle 15 cannot be used because the hollow part cannot represent the strength of the ground layer; when the steel needle 15 at the first circular hole 7 of the present application penetrates into the mural, the remaining steel needles 15 will enter the avoidance hole 33, and then the push rod 6 can be moved 1cm-2cm closer to the connecting disk 16 again. At this time, the steel needle 15 in the avoidance hole 33 will push the moving disk 30, so that the gas in the avoidance hole 33 passes through the connecting disk 16 and the air inlet 29, and finally enters the through hole 14, and then is injected into the mural, so as to achieve the effect of automatically injecting gas into the mural through the above-mentioned mechanism.

[0047] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A strength loss detection device suitable for ancient murals, comprising a hollow column (1); Features: One end of the hollow column (1) is connected to a hollow block (2), an electric telescopic rod (4) is arranged inside the hollow column (1), and a movable plate (5) is fixedly mounted on the output end of the electric telescopic rod (4); A first pressure sensor (8) is provided between the output end of the electric telescopic rod (4) and the movable plate (5), and the first pressure sensor (8) is used to measure the thrust of the steel needle (15) pushed into the mural; A set of connecting sleeves (3) are fixedly connected to the side of the hollow block (2) away from the hollow column (1), a steel needle (15) is arranged inside the connecting sleeve (3), and a first circular hole (7) for the steel needle (15) to pass through is opened on the side of the connecting sleeve (3) away from the hollow block (2); A push rod (6) is slidably connected to a side of the movable plate (5) away from the electric telescopic rod (4), and the push rod (6) is used to push the steel needle (15) in the connecting sleeve (3). A driving mechanism for driving the push rod (6) to move is provided on the movable plate (5); The driving mechanism comprises a hollow elastic ring (9) fixed on the electric telescopic rod (4); a pressure ring (10) is fixedly connected to the output end of the electric telescopic rod (4); a first slide groove (13) is provided on the movable plate (5); a first magnetic block (12) which is magnetically attracted to the push rod (6) is sealed and slidably connected in the first slide groove (13); a connecting pipe (11) is connected between the first slide groove (13) and the elastic ring (9); a control valve is provided on the connecting pipe (11); a first spring is fixedly connected between a side of the first magnetic block (12) close to the connecting pipe (11) and an inner wall of the first slide groove (13); a first air outlet is provided on the side wall of the movable plate (5); the first air outlet is located on a side of the first magnetic block (12) away from the first spring.

2. A strength loss detection device suitable for ancient murals according to claim 1, characterized in that: The inner wall of the connecting sleeve (3) away from the push rod (6) is rotatably connected to a rotating shaft (17); one end of the rotating shaft (17) close to the push rod (6) is fixedly connected to a connecting disk (16); the connecting disk (16) is provided with storage holes evenly distributed in an annular pattern; the positions of the storage holes correspond to the first circular hole (7); the push rod (6) is provided with avoidance holes (33) corresponding to the storage holes; and a rotating mechanism for driving the rotating shaft (17) to rotate is provided in the connecting sleeve (3).

3. A strength loss detection device suitable for ancient murals according to claim 2, characterized in that: The rotating mechanism comprises a rotating groove (20) formed on a side of the connecting plate (16) away from the movable plate (5); a first connecting plate (18) is fixedly connected to the inner wall of the rotating groove (20); a side of the first connecting plate (18) close to the rotating shaft (17) is connected to the rotating shaft (17) in a sealed and rotatable manner; a second connecting plate (19) is fixedly connected to the side wall of the rotating shaft (17); a side of the second connecting plate (19) close to the rotating groove (20) is connected to the rotating groove (20) in a sealed and rotatable manner; and a side wall of the connecting plate (16) is formed on the inner wall of the connecting plate (16) and the rotating groove (20) is fixedly connected to the rotating shaft (17). A second air outlet hole connected to the rotating groove (20) is provided, the outer wall of the connecting sleeve (3) is provided with a second sliding groove (21) corresponding to the connecting plate (16), a push plate (22) is sealingly and slidably connected in the second sliding groove (21), a second spring is fixedly connected between the push plate (22) and the inner wall of the second sliding groove (21), a group of connecting columns (23) of different lengths are fixedly connected on the side of the push plate (22) away from the second spring, and the rotating shaft (17) is twistedly connected to the inner wall of the connecting sleeve (3) through a torsion spring.

4. The strength loss detection device for ancient murals according to claim 2, characterized in that: A connecting hole (24) aligned with the first circular hole (7) is provided on a side of the push rod (6) close to the connecting sleeve (3); a movable groove connected to the connecting hole (24) is provided in the push rod (6); a clamping block (26) is slidably connected in the movable groove; an annular groove (25) clamped with the clamping block (26) is provided on the steel needle (15); and a side of the clamping block (26) close to the steel needle (15) is in the shape of an inclined surface.

5. The strength loss detection device for ancient murals according to claim 4, characterized in that: A fixing rod (27) is fixedly connected to the top surface of the clamping block (26), a third spring is fixedly connected between the top surface of the fixing rod (27) and the inner wall of the movable groove, and a second magnetic block (28) magnetically attracted to the fixing rod (27) is fixedly connected to the inner wall of the connecting sleeve (3).

6. The strength loss detection device for ancient murals according to claim 5, characterized in that: The push rod (6) is provided with a connecting groove (32), the push rod (6) is provided with an air inlet hole (29) connected with the connecting groove (32) and the connecting hole (24), a gas injection assembly is provided in the connecting groove (32), a second pressure sensor (31) is provided in the connecting groove (32), the second pressure sensor (31) is used to measure the pressure of the injected gas, and the steel needle (15) is provided with a through hole (14).

7. The strength loss detection device for ancient murals according to claim 6, characterized in that: The gas injection assembly comprises a movable plate (30) which is sealingly and slidably connected to the inner wall of the avoidance hole (33); the avoidance hole (33) is in communication with the connection groove (32); and a fourth spring is fixedly connected between the movable plate (30) and the connection groove (32).

8. The strength loss detection device for ancient murals according to claim 1, characterized in that: The connecting sleeve (3) is provided with a mounting groove near the first circular hole (7); an elastic ring (35) is fixedly connected to the inner wall of the mounting groove; and bristles extending into the first circular hole (7) are fixedly connected to the inner wall of the elastic ring (35).

9. The strength loss detection device for ancient murals according to claim 8, characterized in that: The interior of the elastic ring (35) is a hollow structure; a group of inclined pressure plates (36) are twisted to the inner wall of the first circular hole (7) via a torsion spring; a hollow elastic block (37) is fixedly connected between the pressure plate (36) and the inner wall of the first circular hole (7); and a guide hole (34) communicating with the elastic block (37) and the elastic ring (35) is provided in the connecting sleeve (3).

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