Measuring tool for constructional engineering

Abstract

The utility model is applicable to the technical field of engineering measuring tools, and provides a measuring tool for constructional engineering, which comprises a measuring cylinder made of transparent plastic materials, the surface of the measuring cylinder is provided with scale marks, the periphery of the measuring cylinder is fixedly connected with a limiting ring, and a measuring rod is arranged at the bottom of the measuring cylinder in a penetrating manner. The measuring rod is slidably connected with the measuring cylinder, a measuring mechanism is arranged between the measuring rod and the measuring cylinder, the measuring mechanism is used for measuring the thickness of concrete, and the top of the limiting ring is fixedly connected with a fixing cylinder. By arranging the measuring mechanism, the thickness of the concrete can be measured through the depth of the measuring rod inserted into the concrete, cement can be prevented from entering the measuring cylinder due to the fact that the outer portion of the measuring cylinder is well sealed, the periphery of the measuring rod can be cleaned in cooperation with the cleaning mechanism, and therefore the cement can be prevented from entering the device; therefore, the device cannot be used due to cement solidification.

Description

Technical Field

[0001] The utility model belongs to an engineering surveying tool, in particular to a surveying tool for construction engineering. Background Art

[0002] Concrete (also known as concrete) is a composite material composed of gel material, aggregate and water in appropriate proportions, which is then hardened over a period of time. It is the world's most widely used artificial civil construction material. Concrete thickness is an important component of concrete construction quality control. Insufficient concrete thickness will cause cracking in building floors.

[0003] The Chinese patent publication number CN219200282U discloses a portable concrete thickness measuring device, including a measuring sleeve, a measuring rod movable in the measuring sleeve, a movable groove on the measuring sleeve, a sliding rod at the inner end of the measuring rod, and the sliding rod passes through the movable groove and moves along the movable groove, and a scale is provided on the outer wall of the measuring sleeve and on both sides of the movable groove; and a buoyancy disk is provided at the bottom end of the measuring sleeve.

[0004] However, the above patent has the following shortcomings:

[0005] 1. The aforementioned patent uses a scale to observe the depth of the tapered guide column inserted into the concrete, which can easily measure the thickness of the concrete. However, the surface of the measuring sleeve in the aforementioned patent is provided with a movable groove, which makes it easy for concrete to enter the interior of the device. As a result, the aforementioned patent is prone to getting stuck and becoming unusable after the concrete solidifies.

[0006] 2. The above patent does not have a mechanism for fine-tuning the tapered guide column, so the height of the measuring sleeve on the concrete surface cannot be adjusted, which will cause an error between the tapered guide column and the adjustable measuring sleeve, thereby reducing the measurement accuracy of the concrete thickness. Utility Model Content

[0007] The utility model provides a measuring tool for construction engineering, which aims to solve the problems mentioned in the above-mentioned background technology, that is, the surface of the measuring sleeve in the above-mentioned patent is provided with a movable groove, which makes it easy for concrete to enter the interior of the device, and then the above-mentioned patent is easily stuck and cannot be used after the concrete is solidified, and the above-mentioned patent does not have a mechanism for fine-tuning the tapered guide column, so that the height of the measuring sleeve on the concrete surface cannot be adjusted, which will cause an error between the tapered guide column and the adjustable measuring sleeve, thereby reducing the measurement accuracy of the concrete thickness.

[0008] The utility model is realized as follows: a measuring tool for construction engineering, comprising a measuring cylinder, the measuring cylinder being made of a transparent plastic material, having scale lines on its surface, a limit ring fixedly connected to the outer periphery of the measuring cylinder, a measuring rod penetrating the bottom of the measuring cylinder, the measuring rod being slidably connected to the measuring cylinder, a measuring mechanism being provided between the measuring rod and the measuring cylinder, the measuring mechanism being used to measure the thickness of concrete;

[0009] The top of the limiting ring is fixedly connected to a fixing cylinder, and a fine-tuning mechanism is provided between the fixing cylinder and the measuring cylinder, and the fine-tuning mechanism is used to finely adjust the measuring mechanism;

[0010] A cleaning mechanism is provided at the bottom of the fixing cylinder, and the cleaning mechanism is used to clean the surface of the measuring rod.

[0011] Preferably, the measuring mechanism includes a first connecting pipe, a second connecting pipe and a piston ring, the end of the first connecting pipe is connected to the top of the outer side of the measuring cylinder, and a first ball valve is provided in the middle of the first connecting pipe;

[0012] The end of the second connecting pipe is connected to the outer bottom of the measuring cylinder, and a second ball valve is provided in the middle of the second connecting pipe;

[0013] The piston ring is arranged inside the measuring cylinder, the outer periphery of the piston ring is in contact with the inner wall of the measuring cylinder, the inner periphery of the piston ring is fixedly connected to the middle of the measuring rod, the top of the piston ring is provided with an extrusion spring, the extrusion spring is slidably sleeved on the outer periphery of the measuring rod, the bottom of the extrusion spring is against the piston ring, and the top of the extrusion spring is against the inner wall of the measuring cylinder;

[0014] The top of the piston ring is fixedly connected to a connecting rod, the top of the connecting rod is fixedly connected to a measuring needle, and the measuring needle matches the scale line;

[0015] Place the measuring cylinder on the surface of the cement and make the limit ring on the outer circumference of the measuring cylinder flush with the surface of the cement. At this time, open the first ball valve in the middle of the first connecting pipe and the second ball valve in the second connecting pipe in sequence. At this time, the cavity above the piston ring and the measuring cylinder, as well as the cavity below the piston ring and the measuring cylinder, are connected to the outside world. At this time, the piston ring and the measuring rod can be driven downward by the extrusion spring until the end of the measuring rod touches the bottom of the concrete. At this time, closing the first ball valve and the second ball valve can seal the cavity above the piston ring and the measuring cylinder, as well as the cavity below the piston ring and the measuring cylinder. At this time, the piston ring will be locked by the air pressure in the measuring cylinder and cannot move, so the measuring rod can be fixed. At this time, the thickness of the concrete can be known by observing the position of the measuring needle above the piston plate on the scale line.

[0016] Preferably, the fine-tuning mechanism includes a third communicating tube, a piston plate and a rotating sleeve, wherein the third communicating tube is arranged between the measuring cylinder and the fixed cylinder, one end of the third communicating tube is connected to the measuring cylinder, and the other end of the third communicating tube is connected to the fixed cylinder;

[0017] The outer periphery of the piston plate fits with the inner wall of the fixed cylinder, the top of the piston plate is fixedly connected to a threaded rod, both sides of the threaded rod are provided with limit rods, the bottoms of the two limit rods are fixedly connected to the piston plate, the threaded rod and the limit rod are both set through the fixed cylinder, and the threaded rod and the limit rod are both slidably connected to the fixed cylinder;

[0018] The bottom of the rotating sleeve is rotatably connected to the fixed cylinder, the middle portion of the threaded rod passes through the fixed cylinder, and the threaded rod is threadedly connected to the fixed cylinder;

[0019] When the measuring cylinder is placed on the cement surface and the bottom of the measuring rod is against the bottom of the concrete, if the limit ring is not flush with the concrete surface, the insertion length of the measuring rod can be adjusted to make the limit ring flush with the cement surface to improve the measurement accuracy of the device;

[0020] When the insertion depth of the measuring rod needs to be adjusted, the first ball valve is opened first. At this time, the cavity above the piston ring and the measuring cylinder is connected to the outside world, and the cavity below the piston ring and the measuring cylinder is closed.

[0021] The sealing plate is limited by two limiting rods and cannot rotate on its own. Therefore, by rotating the rotating sleeve, the threaded rod connected to it and the sealing plate can be driven to move along the axis of the threaded rod. By adjusting the rotation direction of the rotating sleeve, the sealing plate can be driven to rise or fall.

[0022] When the sealing plate moves downward, the gas in the fixed cylinder can enter the cavity below the piston ring and the measuring cylinder through the third connecting pipe, thereby squeezing and driving the piston ring to move upward, and further driving the measuring rod to move upward;

[0023] When the sealing plate moves upward, the fixed cylinder becomes negative pressure. At this time, the gas in the cavity below the piston ring and the measuring cylinder will enter the fixed cylinder through the third connecting pipe, thereby driving the piston plate to move downward, and then driving the measuring rod to move downward;

[0024] The insertion depth of the measuring rod can be fine-tuned in the above manner, thereby facilitating improvement of the measuring accuracy of the device.

[0025] Preferably, the cleaning mechanism includes a mounting cylinder, the top of the mounting cylinder is fixedly connected to the measuring cylinder, the bottom of the mounting cylinder is provided with a mounting groove, the mounting groove is annular, a cleaning ring is provided in the mounting groove, the cleaning ring is slidably sleeved on the outer periphery of the measuring rod, the outer periphery of the mounting cylinder is threadedly connected to the mounting ring, and the measuring rod is arranged through the mounting ring;

[0026] Place the measuring rod against the ground and press the installation tube to retract the measuring rod into the installation tube. When the measuring rod shrinks in the concrete, the cleaning ring will clean the cement around the measuring rod to prevent cement from adhering to the outer periphery of the measuring rod. When the cleaning ring is used for too long and ages, it can be replaced by rotating the installation ring.

[0027] Preferably, a first annular groove is formed on the outer periphery of the piston ring, a first sealing ring is provided inside the first annular groove, a second annular groove is formed on the outer periphery of the piston plate, a second sealing ring is provided inside the second annular groove, and a level is provided on the top of the measuring cylinder;

[0028] By setting the first sealing ring, the air tightness between the piston ring and the inner wall of the measuring cylinder can be improved. By setting the second sealing ring, the air tightness between the piston plate and the inner wall of the fixed cylinder can be improved. The level can be used to conveniently observe the verticality of the measuring cylinder, which is beneficial to improving the measurement accuracy of the device.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is a construction engineering measurement tool:

[0030] 1. By setting up a measuring mechanism, the thickness of concrete can be measured by measuring the depth of the measuring rod inserted into the concrete. The outer sealing of the measuring tube can prevent cement from entering the measuring tube. The cleaning mechanism can clean the outer periphery of the measuring rod to prevent cement from entering the device and causing the device to be unusable.

[0031] 2. By setting up a fine-tuning mechanism, the extended length of the measuring rod can be fine-tuned by rotating the rotating sleeve, so that the limit ring on the outer periphery of the measuring cylinder can be flush with the concrete surface, thereby improving the measurement accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a first-perspective stereogram of the present invention;

[0033] Figure 2 This is a second perspective stereogram of the present invention;

[0034] Figure 3 This is a cross-sectional view of the measuring mechanism of the present utility model;

[0035] Figure 4 This is a cross-sectional view of the fine-tuning mechanism of the present utility model;

[0036] Figure 5 For this utility model Figure 3 A magnified view of the structure of part A;

[0037] Figure 6This is a schematic diagram of the cleaning mechanism of the present utility model;

[0038] Figure 7 This is a schematic diagram of the first sealing ring of the utility model;

[0039] Figure 8 This is a schematic diagram of the second sealing ring of the present invention.

[0040] In the picture:

[0041] 1. Measuring cylinder; 11. Scale line; 12. Limiting ring; 13. Measuring rod; 14. Fixed cylinder;

[0042] 2. Measuring mechanism; 21. First connecting pipe; 22. Second connecting pipe; 23. Piston ring; 24. Second ball valve; 25. Extrusion spring; 26. Connecting rod; 27. Measuring needle; 28. Piston ring;

[0043] 3. Fine adjustment mechanism; 31. Third connecting pipe; 32. Piston plate; 33. Rotating sleeve; 34. Threaded rod; 35. Limit rod;

[0044] 4. Cleaning mechanism; 41. Mounting cylinder; 42. Mounting groove; 43. Cleaning ring; 44. Mounting ring;

[0045] 5. First annular groove; 51. First sealing ring; 52. Second annular groove; 53. Second sealing ring; 54. Level. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0047] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0048] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0051] See also Figure 1-8 The utility model provides a technical solution: a measuring tool for construction engineering, comprising a measuring tube 1, the measuring tube 1 being made of a transparent plastic material, having scale lines 11 on its surface, a limit ring 12 fixedly connected to the outer periphery of the measuring tube 1, a measuring rod 13 penetrating the bottom of the measuring tube 1, the measuring rod 13 being slidably connected to the measuring tube 1, a measuring mechanism 2 being provided between the measuring rod 13 and the measuring tube 1, the measuring mechanism 2 being used to measure the thickness of concrete;

[0052] A fixing cylinder 14 is fixedly connected to the top of the limiting ring 12. A fine-tuning mechanism 3 is provided between the fixing cylinder 14 and the measuring cylinder 1. The fine-tuning mechanism 3 is used to finely adjust the measuring mechanism 2.

[0053] A cleaning mechanism 4 is provided at the bottom of the fixing cylinder 14 , and the cleaning mechanism 4 is used to clean the surface of the measuring rod 13 .

[0054] Furthermore, the measuring mechanism 2 includes a first connecting pipe 21, a second connecting pipe 22 and a piston ring 28. The end of the first connecting pipe 21 is connected to the top of the outer side of the measuring cylinder 1. A first ball valve 23 is provided in the middle of the first connecting pipe 21.

[0055] The end of the second connecting pipe 22 is connected to the outer bottom of the measuring cylinder 1, and a second ball valve 24 is provided in the middle of the second connecting pipe 22;

[0056] The piston ring 28 is arranged inside the measuring cylinder 1, and the outer periphery of the piston ring 28 is in contact with the inner wall of the measuring cylinder 1. The inner periphery of the piston ring 28 is fixedly connected to the middle part of the measuring rod 13. The top of the piston ring 28 is provided with an extrusion spring 25, which is slidably sleeved on the outer periphery of the measuring rod 13. The bottom of the extrusion spring 25 is in contact with the piston ring 28, and the top of the extrusion spring 25 is in contact with the inner wall of the measuring cylinder 1.

[0057] A connecting rod 26 is fixedly connected to the top of the piston ring 28 , and a measuring needle 27 is fixedly connected to the top of the connecting rod 26 . The measuring needle 27 matches the scale line 11 .

[0058] Furthermore, the fine-tuning mechanism 3 includes a third connecting tube 31, a piston plate 32, and a rotating sleeve 33. The third connecting tube 31 is disposed between the measuring cylinder 1 and the fixed cylinder 14. One end of the third connecting tube 31 is connected to the measuring cylinder 1, and the other end of the third connecting tube 31 is connected to the fixed cylinder 14.

[0059] The outer periphery of the piston plate 32 fits against the inner wall of the fixed cylinder 14. A threaded rod 34 is fixedly connected to the top of the piston plate 32. Limit rods 35 are provided on both sides of the threaded rod 34. The bottoms of the two limit rods 35 are fixedly connected to the piston plate 32. The threaded rod 34 and the limit rods 35 are both arranged through the fixed cylinder 14 and are slidably connected to the fixed cylinder 14.

[0060] The bottom of the rotating sleeve 33 is rotatably connected to the fixed cylinder 14 . The middle portion of the threaded rod 34 passes through the fixed cylinder 14 , and the threaded rod 34 is threadedly connected to the fixed cylinder 14 .

[0061] Furthermore, the cleaning mechanism 4 includes a mounting cylinder 41, the top of the mounting cylinder 41 is fixedly connected to the measuring cylinder 1, and a mounting groove 42 is provided at the bottom of the mounting cylinder 41. The mounting groove 42 is set to be annular, and a cleaning ring 43 is provided in the mounting groove 42. The cleaning ring 43 is slidably sleeved on the outer periphery of the measuring rod 13. The outer periphery of the mounting cylinder 41 is threadedly connected with a mounting ring 44, and the measuring rod 13 is arranged through the mounting ring 44.

[0062] Furthermore, a first annular groove 5 is formed on the outer periphery of the piston ring 28, a first sealing ring 51 is provided inside the first annular groove 5, a second annular groove 52 is formed on the outer periphery of the piston plate 32, a second sealing ring 53 is provided inside the second annular groove 52, and a level 54 is provided on the top of the measuring cylinder 1.

[0063] The working principle and use process of this utility model:

[0064] The measuring cylinder 1 is placed on the surface of the cement and the limiting ring 12 on the outer periphery of the measuring cylinder 1 is flush with the surface of the cement. At this time, the first ball valve 23 in the middle of the first connecting pipe 21 and the second ball valve 24 in the second connecting pipe 22 are opened in sequence. At this time, the cavity above the piston ring 28 and the measuring cylinder 1, as well as the cavity below the piston ring 28 and the measuring cylinder 1 are connected to the outside world. At this time, the piston ring 28 and the measuring rod 13 can be driven downward by the compression spring 25 until the end of the measuring rod 13 touches the bottom of the concrete. At this time, closing the first ball valve 23 and the second ball valve 24 can seal the cavity above the piston ring 28 and the measuring cylinder 1, as well as the cavity below the piston ring 28 and the measuring cylinder 1. At this time, the piston ring 28 will be locked by the air pressure in the measuring cylinder 1 and cannot move, thereby fixing the measuring rod 13. At this time, the thickness of the concrete can be obtained by observing the position of the measuring needle 27 above the piston plate 32 on the scale line 11.

[0065] When the measuring tube 1 is placed on the cement surface and the bottom of the measuring rod 13 is against the bottom of the concrete, if the limit ring 12 is not flush with the concrete surface, the insertion length of the measuring rod 13 can be adjusted to make the limit ring 12 flush with the cement surface to improve the measurement accuracy of the device;

[0066] When the insertion depth of the measuring rod 13 needs to be adjusted, the first ball valve 23 is first opened. At this time, the cavity above the piston ring 28 and the measuring cylinder 1 is connected to the outside world, and the cavity below the piston ring 28 and the measuring cylinder 1 is closed.

[0067] The sealing plate is limited by two limiting rods 35 and cannot rotate on its own. Therefore, by rotating the rotating sleeve 33, the threaded rod 34 threadedly connected to it and the sealing plate can be driven to move along the axis of the threaded rod 34. By adjusting the rotation direction of the rotating sleeve 33, the sealing plate can be driven to rise or fall.

[0068] When the sealing plate moves downward, the gas in the fixed cylinder 14 can enter the cavity below the piston ring 28 and the measuring cylinder 1 through the third connecting pipe 31, thereby squeezing and driving the piston ring 28 to move upward, and further driving the measuring rod 13 to move upward;

[0069] When the sealing plate moves upward, the fixed cylinder 14 becomes negatively pressurized. At this time, the gas below the piston ring 28 and in the cavity of the measuring cylinder 1 enters the fixed cylinder 14 through the third connecting pipe 31, thereby driving the piston plate 32 to move downward, and further driving the measuring rod 13 to move downward.

[0070] The above method can fine-tune the insertion depth of the measuring rod 13, thereby improving the measurement accuracy of the device;

[0071] The measuring rod 13 is placed against the ground and the mounting tube 41 is pressed to retract the measuring rod 13 into the mounting tube 41. As the measuring rod 13 retracts into the concrete, the cleaning ring 43 cleans the cement around the measuring rod 13, thereby preventing cement from adhering to the outer periphery of the measuring rod 13. When the cleaning ring 43 ages due to long-term use, it can be replaced by rotating the mounting ring 44.

[0072] The level 54 can be used to conveniently observe the verticality of the measuring tube 1, thereby facilitating improvement of the measurement accuracy of the device.

Claims

1. A measuring tool for construction engineering, comprising a measuring tube (1), characterized in that: The measuring cylinder (1) is made of a transparent plastic material, a scale line (11) is provided on the surface of the measuring cylinder (1), a limit ring (12) is fixedly connected to the outer periphery of the measuring cylinder (1), a measuring rod (13) is provided through the bottom of the measuring cylinder (1), the measuring rod (13) is slidably connected to the measuring cylinder (1), a measuring mechanism (2) is provided between the measuring rod (13) and the measuring cylinder (1), and the measuring mechanism (2) is used to measure the thickness of concrete; A fixing cylinder (14) is fixedly connected to the top of the limiting ring (12), and a fine adjustment mechanism (3) is provided between the fixing cylinder (14) and the measuring cylinder (1), and the fine adjustment mechanism (3) is used to finely adjust the measuring mechanism (2); A cleaning mechanism (4) is provided at the bottom of the fixed cylinder (14), and the cleaning mechanism (4) is used to clean the surface of the measuring rod (13).

2. A construction engineering measurement tool according to claim 1, characterized in that: The measuring mechanism (2) comprises a first communicating tube (21), a second communicating tube (22) and a piston ring (28); the end of the first communicating tube (21) is connected to the top of the outer side of the measuring cylinder (1); and a first ball valve (23) is provided in the middle of the first communicating tube (21); The end of the second communicating tube (22) is connected to the outer bottom of the measuring cylinder (1), and a second ball valve (24) is provided in the middle of the second communicating tube (22); The piston ring (28) is arranged inside the measuring cylinder (1), the outer periphery of the piston ring (28) is in contact with the inner wall of the measuring cylinder (1), the inner periphery of the piston ring (28) is fixedly connected to the middle of the measuring rod (13), the top of the piston ring (28) is provided with an extrusion spring (25), the extrusion spring (25) is slidably sleeved on the outer periphery of the measuring rod (13), the bottom of the extrusion spring (25) is against the piston ring (28), and the top of the extrusion spring (25) is against the inner wall of the measuring cylinder (1); The top of the piston ring (28) is fixedly connected to a connecting rod (26), and the top of the connecting rod (26) is fixedly connected to a measuring needle (27), and the measuring needle (27) matches the scale line (11).

3. A construction engineering measurement tool according to claim 2, characterized in that: The fine adjustment mechanism (3) comprises a third communicating tube (31), a piston plate (32) and a rotating sleeve (33); the third communicating tube (31) is arranged between the measuring tube (1) and the fixed tube (14); one end of the third communicating tube (31) is connected to the measuring tube (1), and the other end of the third communicating tube (31) is connected to the fixed tube (14); The outer periphery of the piston plate (32) is fitted with the inner wall of the fixed cylinder (14); a threaded rod (34) is fixedly connected to the top of the piston plate (32); limiting rods (35) are provided on both sides of the threaded rod (34); the bottoms of the two limiting rods (35) are fixedly connected to the piston plate (32); the threaded rod (34) and the limiting rod (35) are both arranged through the fixed cylinder (14); and the threaded rod (34) and the limiting rod (35) are both slidably connected to the fixed cylinder (14); The bottom of the rotating sleeve (33) is rotatably connected to the fixed cylinder (14), the middle of the threaded rod (34) passes through the fixed cylinder (14), and the threaded rod (34) is threadedly connected to the fixed cylinder (14).

4. A construction engineering measurement tool according to claim 1, characterized in that: The cleaning mechanism (4) comprises a mounting cylinder (41), the top of the mounting cylinder (41) is fixedly connected to the measuring cylinder (1), the bottom of the mounting cylinder (41) is provided with a mounting groove (42), the mounting groove (42) is annular, a cleaning ring (43) is provided in the mounting groove (42), the cleaning ring (43) is slidably sleeved on the outer periphery of the measuring rod (13), the outer periphery of the mounting cylinder (41) is threadedly connected with a mounting ring (44), and the measuring rod (13) is arranged to pass through the mounting ring (44).

5. A construction engineering measurement tool according to claim 3, characterized in that: A first annular groove (5) is provided on the outer periphery of the piston ring (28), a first sealing ring (51) is provided inside the first annular groove (5), a second annular groove (52) is provided on the outer periphery of the piston plate (32), a second sealing ring (53) is provided inside the second annular groove (52), and a level (54) is provided on the top of the measuring cylinder (1).

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