Waterproof coating thickness detection method

Abstract

A waterproof coating thickness detection method disclosed by the present invention comprises the steps of installing a detection needle, placing a detection device on a waterproof coating needing to be detected, rotating a driving member, enabling the driving member to push a positioning member downwards, pushing a movable block at the lower end to slide in a movable chamber through the positioning member, compressing a first spring, enabling a measurement needle to gradually pierce into the waterproof coating, and detecting the thickness of the waterproof coating. The descending distance value of the measuring needle is checked through an observation window on the shell, and data are recorded. According to the waterproof coating thickness detection method, a replaceable and detachable detection needle is adopted for detection, the detection needle is installed before detection, the detection needle is taken down after detection is completed, and other tools are not needed. The anti-theft device is stable in structure and not prone to falling off, the first limiting piece, the second limiting piece, the first guiding part and the second guiding part can be matched, mistaken disassembly by irrelevant personnel is avoided, and the anti-theft device has certain anti-theft performance. In addition, the position of the detection needle can be positioned through the maintaining assembly, and the data accuracy is improved.

Description

Technical Field

[0001] The invention relates to a coating thickness detection technology, and in particular to a waterproof coating thickness detection method. Background Art

[0002] The waterproof layer can prevent indoor water or groundwater from entering the roof. It is well known that the waterproof coating plays a very important role in the service life and performance of the building. Therefore, in the entire construction process, it is particularly important to control the construction quality of the waterproof layer. The construction quality of the waterproof coating is mainly evaluated from two dimensions: dynamic construction monitoring and static quality acceptance. Among them, dynamic construction monitoring refers to the inspection of the implementation of the coating construction process, and static quality acceptance refers to the detection of the coating thickness.

[0003] The current waterproof coating thickness test requires piercing the waterproof coating to obtain data. After long-term use, the piercing part of the test needle will become blunt, making it difficult to pierce quickly and accurately, affecting the test efficiency and causing the waterproof coating to rupture. Moreover, the test needle will endanger the personal safety of the user when it is not needed. Summary of the invention

[0004] In order to solve the defects of the above-mentioned prior art, the present invention proposes a method for detecting the thickness of a waterproof coating.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A method for detecting the thickness of a waterproof coating comprises the following steps:

[0007] Step 1: Take out the detection needle, insert the detection needle from the bottom of the housing, keep the upper end of the detection needle installed in the middle of the movable block, and rotate the detection needle;

[0008] Step 2: Place the required detection device on the waterproof coating to be detected;

[0009] Step 3, rotating the driving member so that the driving member pushes the positioning member downward, the positioning teeth on the positioning member pass over the retaining member, and the positioning member pushes the movable block at the lower end to slide in the movable chamber, compressing the first spring, and the measuring needle gradually penetrates into the waterproof coating. The distance the measuring needle descends is viewed through the observation window on the housing, and the data is recorded;

[0010] Step 4, loosen the pressure member, the retaining member rotates under the elastic force of the tension spring and the elastic member and keeps the lower end out of contact with the positioning tooth, and rotates the driving member in the reverse direction to drive the positioning member and the movable block to reset;

[0011] Step 5, rotate the measuring needle to the position corresponding to the first limit piece and the second limit piece and take it out;

[0012] in,

[0013] The detection device comprises:

[0014] a shell, wherein the interior of the shell is hollowed out to form an activity chamber,

[0015] A driving member is arranged in the activity chamber, the upper end of the driving member extends out of the shell, and the lower end is provided with a positioning member, and the positioning member is provided with a plurality of positioning teeth.

[0016] A movable block is arranged at the lower end of the positioning member, a measuring needle is arranged in the middle of the movable block, the upper end of the measuring needle is installed in the middle of the movable block, and the lower end extends to the outside through the shell, and a first limiter and a second limiter are arranged in the middle of the movable block for limiting the position of the measuring needle. The measuring needle can be taken out from the middle of the movable block by rotating it, and a first spring is sleeved on the outside of the measuring needle, the upper end of the first spring contacts the movable block, and the lower end contacts the inner wall of the shell,

[0017] And a retaining assembly for limiting the position of the positioning member, wherein the retaining assembly limits the positioning member from naturally moving upward under the elastic force of the first spring and under the guidance of the driving member.

[0018] In the present invention, the shell is provided with a first threaded hole, the driving member is provided with a rotating wheel, a first threaded portion, a ball head portion and a connecting portion, the first threaded portion is installed in cooperation with the first threaded hole, the positioning member is provided with symmetrical positioning blocks, and the middle of the positioning block is provided with a ball groove that cooperates with the ball head portion and a connecting groove that cooperates with the connecting portion.

[0019] In the present invention, a mounting hole, a first sliding hole and a second sliding hole are provided in the middle of the movable block, the mounting hole is connected to the first sliding hole and the second sliding hole, the first limiting member is arranged in the first sliding hole, the second limiting member is arranged in the second sliding hole, a second spring is provided in the first sliding hole and the second sliding hole, one end of the second spring is in contact with the first limiting member or the second limiting member, and the other end is provided with a plug.

[0020] In the present invention, the first limiting member and the second limiting member are provided with limiting heads, the limiting heads are provided with limiting planes and first guiding inclined surfaces, and the second limiting member is provided with a limiting protrusion.

[0021] In the present invention, the measuring needle is composed of a mounting head, a mounting portion, a sealing section, a square section, a scale section and a piercing section from top to bottom. The mounting head is in the shape of a ball head. The mounting head and the mounting portion are connected by a first guide section. A first annular groove is provided between the first guide section and the mounting portion. The mounting portion and the sealing section are connected by a second guide section. A second annular groove is provided between the second guide section and the sealing section. The limiting protrusion is arranged in the second annular groove.

[0022] In the present invention, a first blocking surface is provided at one end of the mounting head toward the mounting portion, a second blocking surface is provided at one end of the mounting portion toward the sealing section, a second guiding inclined surface is provided at one end toward the mounting head, and a third guiding inclined surface is provided at one end of the sealing section toward the mounting portion, the first blocking surface is in contact with a limiting plane on the first limiting member, and the second blocking surface is in contact with a limiting plane on the second limiting member.

[0023] In the present invention, a first guide portion is provided on the first guide section, a second guide portion is provided on the second guide section, and an angle between the first guide portion and the second guide portion is 180°.

[0024] In the present invention, the first annular groove is connected to the first guide portion through a transition surface, and the second annular groove is connected to the second guide portion through a transition surface.

[0025] In the present invention, a pressure member, a retaining member and an elastic member are provided in the retaining assembly, a first limiting plate and a second limiting plate are provided on the inner wall of the shell, a limiting head is provided toward the middle of the first limiting plate and the second limiting plate, a rotation area is formed between the limiting heads, a rotating part cooperating with the limiting head is provided on the retaining member, a limiting area is formed between the first limiting plate and the second limiting plate, the upper end of the retaining member is arranged in the limiting area, and the lower end is in contact with the positioning tooth.

[0026] In the present invention, the elastic member is arranged between the retaining member and the second limiting plate, the shell is provided with a second threaded hole, and the pressure member is provided with a second threaded portion that cooperates with the second threaded hole. The pressure member is rotated to apply pressure downward to the upper end of the retaining member through the pressure member to compress the elastic member, so that the lower end of the retaining member is rotated and placed between the positioning teeth.

[0027] The waterproof coating thickness detection method of the present invention has the following beneficial effects: the waterproof coating thickness detection method uses a replaceable and detachable detection needle for detection. The detection needle is installed before detection and removed after detection is completed without the need for other tools. The structure adopted is stable and not easy to fall off. It can also be matched by the first limiter, the second limiter, the first guide part and the second guide part to avoid accidental disassembly by unrelated personnel, and has a certain anti-theft performance. In addition, the accuracy of the data can be improved by maintaining the position of the detection needle of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the detection device of the present invention;

[0029] Figure 2 for Figure 1 A top view of

[0030] Figure 3 for Figure 2 The cross-sectional view at AA in FIG.

[0031] Figure 4 for Figure 1 Exploded diagram of

[0032] Figure 5 for Figure 4 A perspective view of the shell structure in FIG.

[0033] Figure 6 for Figure 4 Schematic diagram of the drive member and positioning block structure;

[0034] Figure 7 for Figure 4 A cross-sectional view of the movable block structure in FIG.

[0035] Figure 8 for Figure 4 A schematic diagram of the structure of the first limiter and the second limiter in FIG.

[0036] Fig. 9 for Figure 4 Schematic diagram of the measuring needle structure in FIG.

[0037] Fig.10 for Fig. 9 A top view of

[0038] Fig.11 for Fig.10 The cross-sectional view at DD in ;

[0039] Fig.12 It is a schematic diagram of the structural installation of the measuring needle, the first stopper and the second stopper in the present invention;

[0040] Fig.13 for Figure 4 A schematic diagram of the structure of the first limiting plate, the second limiting plate and the retaining assembly;

[0041] Fig.14 for Fig.13 A schematic diagram of the retaining structure in FIG.

[0042] Fig.15 for Figure 3 A local enlarged view of point B in FIG.

[0043] Fig.16 for Figure 3 A partial enlarged view of point C in the figure.

[0044] In the figure: detection device 1, detection needle 2, housing 3, movable block 4, driving member 5, positioning member 6, positioning tooth 7, holding member 8, tooth groove 9, movable chamber 10, first spring 11, observation window 13, pressure member 14, tension spring 15, elastic member 16, first limit member 17, second limit member 18, holding assembly 19, first threaded hole 20, rotating wheel 21, first threaded portion 22, ball head 23, connecting portion 24, positioning block 25, ball groove 26, connecting groove 27, installation The mounting head 28, the mounting portion 29, the sealing section 30, the square section 31, the scale section 32, the piercing section 33, the first guide slope 34, the second spring 35, the first sliding hole 36, the second sliding hole 37, the first guide section 38, the first annular groove 39, the second guide section 40, the second annular groove 41, the limit head 42, the limit plane 43, the limit protrusion 44, the limit rod 45, the cylinder 46, the blocking block 47, the transition surface 48, the first guide portion 49, and the second guide portion 50 , fourth guide slope 51, third blocking surface 52, third guide slope 53, first limiting area 54, first blocking surface 55, second limiting area 56, second blocking surface 57, second guide slope 58, mounting hole 59, plug 60, seal 61, sealing sleeve 62, sealing cover 63, gap 64, thickened portion 65, sealing ring 66, sealing hole 67, blocking ring 68, guide slope 69, insertion hole 70, support foot 71, third spring 72, first limiting Plate 73, second limiting plate 74, blocking plate 75, limiting head 76, rotation area 77, rotation part 78, limiting area 79, pressure section 80, rotation section 81, limit section 82, rotation mouth 83, vertical section 84, through hole 85, pull rod 86, positioning rod 87, positioning surface 88, inclined surface 89, second threaded hole 90, second threaded part 91, first elastic plate 92, second elastic plate 93, elastic area 94, rotating disk 95, moving stroke 96, small hole 97. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0046] like Figures 1 to 16 As shown, the waterproof coating thickness detection method of the present invention comprises the following steps:

[0047] Step 1, take out the detection needle 2, insert the detection needle 2 from the bottom of the shell 3, keep the upper end of the detection needle 2 installed in the middle of the movable block 4, and rotate the detection needle 2. The rotation angle of the detection needle 2 is within 360 degrees.

[0048] Step 2: Place the required detection device 1 on the waterproof coating to be detected.

[0049] Step 3, rotate the driving member 5 so that the driving member 5 pushes the positioning member 6 downward, and the positioning teeth 7 on the positioning member 6 pass over the retaining member 8, and the retaining member 8 can be deformed by force, and then reach the tooth groove 9 between the next positioning teeth 7 and the positioning teeth 7, limiting the upward movement of the positioning member 6. The positioning member 6 pushes the movable block 4 at the lower end to slide in the movable chamber 10, compressing the first spring 11, and the measuring needle 12 gradually penetrates into the waterproof coating. The distance the measuring needle 12 descends is checked through the observation window 13 on the housing 3, and the data is recorded.

[0050] Step 4, loosen the pressure member 14, the retaining member 8 rotates under the elastic force of the tension spring 15 and the elastic member 16 and keeps the lower end out of contact with the positioning tooth 7, and rotates the driving member 5 in the reverse direction to drive the positioning member 6 and the movable block 4 to reset.

[0051] Step 5: Rotate the measuring needle 12 to a position corresponding to the first limiting member 17 and the second limiting member 18 and take it out.

[0052] The detection device 1 includes a housing 3, a driving member 5, a movable block 4 and a holding assembly 19. A portion of the driving member 5 is disposed in the housing 3, and the movable block 4 is disposed inside the housing 3 and connected to the driving member 5 through a positioning member 6. The holding assembly 19 is used to limit the driving member 5 from continuing to rotate, push the positioning member 6 downward, and affect the measured data. After checking the data, the measuring needle 12 can be reset or replaced.

[0053] The shell 3 is hollowed out to form an activity chamber 10, in which the activity block 4 can move up and down.

[0054] The upper end of the driving member 5 extends out of the shell 3, and a positioning member 6 is provided at the lower end. The positioning member 6 is provided with multiple positioning teeth 7. The shell 3 is provided with a first threaded hole 20, and the driving member 5 is provided with a rotating wheel 21, a first threaded portion 22, a ball head 23 and a connecting portion 24. The first threaded portion 22 is installed in coordination with the first threaded hole 20, and the positioning member 6 is provided with a symmetrical positioning block 25, and the middle of the positioning block 25 is provided with a ball groove 26 that cooperates with the ball head 23 and a connecting groove 27 that cooperates with the connecting portion 24. The rotating wheel 21 is rotated to keep the first threaded portion 22 and the first threaded hole 20 in coordination, and the positioning member 6 is pushed or pulled to move up or down. The positioning block 25 connects the positioning member 6 with the driving member 5, so that the positioning member 6 can move up or down with the driving member 5, and at the same time will not affect the rotation of the driving member 5.

[0055] The movable block 4 is arranged at the lower end of the positioning member 6, and a measuring needle 12 is arranged in the middle of the movable block 4. The upper end of the measuring needle 12 is installed in the middle of the movable block 4, and the lower end passes through the housing 3 and extends to the outside. The measuring needle 12 is composed of a mounting head 28, a mounting portion 29, a sealing section 30, a square section 31, a scale section 32 and a piercing section 33 from top to bottom. The mounting head 28 is in the shape of a ball head, and the surface forms a spherical surface and an arc shape, which is convenient for pushing the first guiding inclined surface 34 on the first limiting member 17 and the second limiting member 18, thereby compressing the second spring 35, so that the first limiting member 17 enters the first sliding hole 36, and the second limiting member 18 enters the second sliding hole 37.

[0056] The mounting head 28 and the mounting portion 29 are connected via a first guide section 38 , a first annular groove 39 is provided between the first guide section 38 and the mounting portion 29 , the mounting portion 29 and the sealing section 30 are connected via a second guide section 40 , a second annular groove 41 is provided between the second guide section 40 and the sealing section 30 , and a limiting protrusion 44 is provided in the second annular groove 41 .

[0057] The middle of the movable block 4 is provided with a first stopper 17 and a second stopper 18 for limiting the position of the measuring needle 12. The measuring needle 12 can be taken out from the middle of the movable block 4 by rotating it. The outer portion of the measuring needle 12 is covered with a first spring 11, the upper end of the first spring 11 contacts the movable block 4, and the lower end contacts the inner wall of the housing 3. The first stopper 17 and the second stopper 18 are provided with a stopper head 42, the stopper head 42 is provided with a stopper plane 43 and a first guiding inclined surface 34, and the second stopper 18 is provided with a stopper protrusion 44. The length and width of the movable block 4 match the length and width of the movable chamber 10, so as to facilitate the sliding of the movable block 4.

[0058] The first limiting member 17 and the second limiting member 18 are composed of a limiting rod 45, a cylinder 46 and a limiting head 42. The second spring is sleeved on the limiting rod 45. The cylinder 46 slides in cooperation with the first sliding hole 36 and the second sliding hole 37. The limiting plane 43 and the first guiding slope 34 are arranged on the limiting head 42.

[0059] The first annular groove 39 is connected to the first guide portion 49 through the transition surface 48, and the second annular groove 41 is connected to the second guide portion 50 through the transition surface 48. The inner diameter of the first annular groove 39 is smaller than the diameter of the first guide section 38, but gradually becomes equal to the diameter of the first guide section 38 through the guidance of the transition surface 48. The second annular groove 41 and the second guide section 40 are also the same, so when the limiting protrusion 44 on the second limiting member 18 is placed in the second annular groove 41, since the limiting protrusion 44 is provided with a fourth guiding inclined surface 51 and a third blocking surface 52, the third blocking surface 52 faces the direction of the third guiding inclined surface 53, and the fourth guiding inclined surface 51 faces the direction of the second guiding section 40. Therefore, the third blocking surface 52 will block the sealing section 30 and continue to enter.

[0060] A first limiting area 54 is formed between the mounting head 28 and the mounting portion 29 , a second limiting area 56 is formed between the mounting portion 29 and the sealing section 30 , the first limiting member 17 is disposed in the first limiting area 54 , and the second limiting member 18 is disposed in the second limiting area 56 .

[0061] A first blocking surface 55 is provided at one end of the mounting head 28 facing the mounting portion 29, and a second blocking surface 57 is provided at one end of the mounting portion 29 facing the sealing section 30. The first blocking surface 55 and the second blocking surface 57 are used to limit the position of the measuring needle 12. A second guiding inclined surface 58 is provided at one end of the mounting portion 29 facing the mounting head 28, and a third guiding inclined surface 53 is provided at one end of the sealing section 30 facing the mounting portion 29. The first blocking surface 55 contacts the limiting plane 43 on the first limiting member 17, and the second blocking surface 57 contacts the limiting plane 43 on the second limiting member 18. The second guiding inclined surface 58 and the third guiding inclined surface 53 are used to cooperate with the first guiding inclined surface 34 to avoid the first guiding inclined surface 34.

[0062] A first guide portion 49 is disposed on the first guide section 38 , and a second guide portion 50 is disposed on the second guide section 40 . The angle between the first guide portion 49 and the second guide portion 50 is 180°.

[0063] Since the limiting protrusion 44 is only provided on the second limiting member 18, and the second limiting member 18 is located at the lower end of the first limiting member 17, when inserting the measuring needle 12, it is necessary to first align the first guide portion 49 on the measuring needle 12 with the position of the second limiting member 18, and then insert the measuring needle 12, so as to avoid the limiting protrusion 44 from restricting the measuring needle 12 from continuing to be inserted into the first annular groove 39. Or when there is no corresponding insertion, it is necessary to rotate the measuring needle 12 when the limiting protrusion 44 enters the first annular groove 39, so that the first guide portion 49 pushes the second limiting member 18 to compress the second spring 35, and then the measuring needle 12 can be inserted further.

[0064] A mounting hole 59, a first sliding hole 36, and a second sliding hole 37 are provided in the middle of the movable block 4. The mounting hole 59 is connected with the first sliding hole 36 and the second sliding hole 37. The first stopper 17 is provided in the first sliding hole 36, and the second stopper 18 is provided in the second sliding hole 37. A second spring 35 is provided in the first sliding hole 36 and the second sliding hole 37. One end of the second spring 35 contacts the first stopper 17 or the second stopper 18, and the other end is provided with a plug 60.

[0065] A sealing member 61 is sleeved on the sealing section 30, and the sealing member 61 is composed of a sealing sleeve 62 and a sealing cover 63. A gap 64 is formed between the sealing sleeve 62 and the sealing section 30. The sealing sleeve 62 is provided with a thickened portion 65 and a sealing ring 66. A sealing hole 67 is provided at the opening of the mounting hole 59, and the inner diameter of the sealing hole 67 is larger than the inner diameter of the mounting hole 59. The thickened portion 65 and the sealing ring 66 are installed in the sealing hole 67.

[0066] A blocking ring 68 is provided on the sealing section 30, and a guiding inclined surface 69 is provided on the blocking ring 68 for guiding the installation of the sealing member 61. After the installation is completed, the blocking ring 68 blocks the sealing member 61, and the sealing cover 63 is deformed by the extrusion force of the blocking ring 68, and is in close contact with the lower end surface of the movable block 4. An insertion hole 70 is provided at the lower end of the housing 3, and the inner diameter of the insertion hole 70 is larger than the outer diameter of the sealing cover 63, so that the sealing member 61 can enter the movable chamber 10 together with the measuring needle 12. The inner diameter of the first spring 11 is larger than the inner diameter of the insertion hole 70. A positioning sleeve (not shown in the figure) can be provided at the lower end of the movable block 4 to facilitate the positioning of the first spring 11.

[0067] A supporting foot 71 is provided at the lower end of the housing 3 . An observation window 13 is also provided on the housing 3 for observing the descending distance of the measuring needle 12 . The observation window 13 is made of a transparent material.

[0068] In order to facilitate recording the rotation angle of the measuring needle 12 , a mark may be provided on the measuring needle 12 .

[0069] A third spring 72 is disposed in the mounting hole 59 , and the third spring 72 is used to apply an external force to the mounting head 28 of the measuring needle 12 to keep the limiting plane 43 in force contact with the first blocking surface 55 and the second blocking surface 57 .

[0070] The retaining assembly 19 is used to limit the position of the positioning member 6 . The retaining assembly 19 limits the positioning member 6 from naturally moving upward under the elastic force of the first spring 11 and the guidance of the driving member 5 .

[0071] The holding assembly 19 is provided with a pressure member 14, a holding member 8 and an elastic member 16. A first limiting plate 73 and a second limiting plate 74 are provided on the inner wall of the housing 3. The first limiting plate 73 is located at the upper end of the second limiting plate 74. At the same time, blocking plates 75 are provided on both sides of the first limiting plate 73 and the second limiting plate 74 to block the positions of the holding member 8 and the elastic member 16.

[0072] A limiting head 76 is provided in the middle between the first limiting plate 73 and the second limiting plate 74, a rotation area 77 is formed between the limiting heads 76, a rotating part 78 cooperating with the limiting head 76 is provided on the retaining member 8, a limiting area 79 is formed between the first limiting plate 73 and the second limiting plate 74, the upper end of the retaining member 8 is arranged in the limiting area 79, and the lower end is in contact with the positioning tooth 7.

[0073] The retaining member 8 is composed of a pressure section 80, a rotation section 81 and a limiting section 82. The pressure section 80 is placed in the limiting area 79. The rotating portion 78 is arranged on the pressure section 80. The rotating portion 78 is provided with a rotation opening 83, which cooperates with the limiting head 76 to realize the rotation of the pressure section 80. A vertical section 84 is provided on the pressure section 80 for blocking the elastic member 16.

[0074] The included angle between the pressure section 80 and the rotating section 81 is less than 90°, and the included angle between the limiting section 82 and the rotating section 81 is greater than 90°.

[0075] A through hole 85 is provided on the limit head 42, a pull rod 86 is provided in the through hole 85, and a positioning rod 87 is provided on the inner wall of the housing 3, and a tension spring 15 is provided between the pull rod 86 and the positioning rod 87, and the tension spring 15 is used to pull the rotating section 81 toward the inner wall of the housing 3, that is, to pull it away from the positioning member 6. The elastic force of the elastic member 16 and the tension of the tension spring 15 can make the rotating section 81 rotate in the direction away from the positioning member 6.

[0076] The positioning tooth 7 is provided with a positioning surface 88 and an inclined surface 89, wherein the positioning surface 88 is a plane and the inclined surface 89 is located at the lower end of the positioning surface 88. The inclined surface 89 can push the limiting section 82 downward, while the positioning surface 88 cannot push the limiting section 82 upward.

[0077] The elastic member 16 is disposed between the retaining member 8 and the second limiting plate 74, the housing 3 is provided with a second threaded hole 90, the pressure member 14 is provided with a second threaded portion 91 that matches the second threaded hole 90, the pressure member 14 is provided with a rotating disk 95, the pressure member 14 is rotated, and the upper end of the retaining member 8 is pressed downward by the pressure member 14, the elastic member 16 is compressed, and the lower end of the retaining member 8 is rotated and placed between the positioning teeth 7 and the positioning teeth 7. The first limiting plate 73 is provided with a small hole 97 through which the pressure member 14 passes.

[0078] The elastic member 16 is composed of a first elastic plate 92 and a second elastic plate 93, one end of the first elastic plate 92 and the second elastic plate 93 are connected, and an elastic region 94 is formed between the first elastic plate 92 and the second elastic plate 93. When the pressure member 14 applies pressure to the pressure section 80, the elastic member 16 can be compressed by the pressure section 80.

[0079] When the pressure member 14 no longer applies pressure to the pressure section 80 , the limiting section 82 can be moved out of the tooth groove 9 by the elastic force of the elastic member 16 and the tension of the tension spring 15 , and the driving member 5 can drive the positioning member 6 to move upward.

[0080] A stopper 47 is also provided on the inner wall of the housing 3 for blocking the position of the retaining member 8. The stopper 47 and the retaining member 8 form a moving stroke 96.

[0081] When the measuring needle 2 is taken out, the first guide portion 49 and the second guide portion 50 need to be aligned with the first stopper 17 and the second stopper 18 respectively before the measuring needle 2 can be taken out.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the thickness of a waterproof coating, characterized in that: The following steps are involved: Step 1: Take out the detection needle, insert the detection needle from the bottom of the housing, keep the upper end of the detection needle installed in the middle of the movable block, and rotate the detection needle; Step 2: Place the required detection device on the waterproof coating to be detected; Step 3, rotating the driving member so that the driving member pushes the positioning member downward, the positioning teeth on the positioning member pass over the retaining member, and the positioning member pushes the movable block at the lower end to slide in the movable chamber, compressing the first spring, and the measuring needle gradually penetrates into the waterproof coating. The distance the measuring needle descends is viewed through the observation window on the housing, and the data is recorded; Step 4, loosen the pressure member, the retaining member rotates under the elastic force of the tension spring and the elastic member and keeps the lower end out of contact with the positioning tooth, and rotates the driving member in the reverse direction to drive the positioning member and the movable block to reset; Step 5, rotate the measuring needle to the position corresponding to the first limit piece and the second limit piece and take it out; in, The detection device comprises: a shell, wherein the interior of the shell is hollowed out to form an activity chamber, A driving member is arranged in the activity chamber, the upper end of the driving member extends out of the shell, and the lower end is provided with a positioning member, and the positioning member is provided with a plurality of positioning teeth. A movable block is arranged at the lower end of the positioning member, a measuring needle is arranged in the middle of the movable block, the upper end of the measuring needle is installed in the middle of the movable block, and the lower end extends to the outside through the shell, and a first limiter and a second limiter are arranged in the middle of the movable block for limiting the position of the measuring needle. The measuring needle can be taken out from the middle of the movable block by rotating it, and a first spring is sleeved on the outside of the measuring needle, the upper end of the first spring contacts the movable block, and the lower end contacts the inner wall of the shell, And a retaining assembly for limiting the position of the positioning member, wherein the retaining assembly limits the positioning member from naturally moving upward under the elastic force of the first spring and under the guidance of the driving member.

2. The waterproof coating thickness detection method according to claim 1, characterized in that: The shell is provided with a first threaded hole, the driving member is provided with a rotating wheel, a first threaded portion, a ball head portion and a connecting portion, the first threaded portion is installed in cooperation with the first threaded hole, the positioning member is provided with symmetrical positioning blocks, and the middle of the positioning block is provided with a ball groove that cooperates with the ball head portion and a connecting groove that cooperates with the connecting portion.

3. The waterproof coating thickness detection method according to claim 1, characterized in that: A mounting hole, a first sliding hole and a second sliding hole are provided in the middle of the movable block, the mounting hole is connected with the first sliding hole and the second sliding hole, the first limiting member is provided in the first sliding hole, the second limiting member is provided in the second sliding hole, a second spring is provided in the first sliding hole and the second sliding hole, one end of the second spring is in contact with the first limiting member or the second limiting member, and the other end is provided with a plug.

4. The waterproof coating thickness detection method according to claim 1, characterized in that: The first and second limiting members are provided with limiting heads, the limiting heads are provided with limiting planes and first guiding inclined surfaces, and the second limiting member is provided with a limiting protrusion.

5. The waterproof coating thickness detection method according to claim 4, characterized in that: The measuring needle is composed of a mounting head, a mounting portion, a sealing section, a square section, a scale section and a piercing section from top to bottom. The mounting head is in the shape of a ball head. The mounting head and the mounting portion are connected by a first guide section. A first annular groove is provided between the first guide section and the mounting portion. The mounting portion and the sealing section are connected by a second guide section. A second annular groove is provided between the second guide section and the sealing section. The limiting protrusion is arranged in the second annular groove.

6. The waterproof coating thickness detection method according to claim 5, characterized in that: A first blocking surface is provided at one end of the mounting head facing the mounting part, a second blocking surface is provided at one end of the mounting part facing the sealing section, a second guiding inclined surface is provided at one end facing the mounting head, and a third guiding inclined surface is provided at one end of the sealing section facing the mounting part, the first blocking surface contacts with a limiting plane on a first limiting member, and the second blocking surface contacts with a limiting plane on a second limiting member.

7. The waterproof coating thickness detection method according to claim 6, characterized in that: The first guide section is provided with a first guide portion, the second guide section is provided with a second guide portion, and the angle between the first guide portion and the second guide portion is 180°.

8. The waterproof coating thickness detection method according to claim 7, characterized in that: The first annular groove is connected to the first guide portion via a transition surface, and the second annular groove is connected to the second guide portion via a transition surface.

9. The waterproof coating thickness detection method according to claim 1, characterized in that: The retaining assembly is provided with a pressure piece, a retaining piece and an elastic piece, the inner wall of the shell is provided with a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are provided with a limiting head toward the middle, a rotation area is formed between the limiting heads, the retaining piece is provided with a rotating part cooperating with the limiting head, a limiting area is formed between the first limiting plate and the second limiting plate, the upper end of the retaining piece is arranged in the limiting area, and the lower end is in contact with the positioning tooth.

10. The waterproof coating thickness detection method according to claim 9, characterized in that: The elastic member is arranged between the retaining member and the second limiting plate, the shell is provided with a second threaded hole, and the pressure member is provided with a second threaded portion that cooperates with the second threaded hole. The pressure member is rotated to apply pressure downward to the upper end of the retaining member through the pressure member to compress the elastic member, so that the lower end of the retaining member is rotated and placed between the positioning teeth.

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