Backfill layer thickness measuring tool

Abstract

The invention relates to the technical field of laying thickness measurement, in particular to a backfill layer thickness measuring tool. The measuring tool can rapidly and accurately measure the thickness of the backfill layer, when the measuring tool is used, the measuring tool is placed on the backfill layer to be measured, the top of the limiting cylinder corresponds to the position of the minimum scale value of the visual window, the measuring rod is pressed downwards, the bottom of the measuring rod is gradually inserted into the backfill layer, the measuring cylinder moves downwards synchronously along with the measuring rod, and in the process, the thickness of the backfill layer is measured accurately. The limiting cylinder keeps still under the counter-acting force of the surface of the backfill layer, so that a displacement difference is generated between the top of the limiting cylinder and the measuring cylinder, and the depth of the measuring rod inserted into the backfill layer can be obtained by observing the scale position of the visual window corresponding to the top of the limiting cylinder, so that the thickness of the backfill layer can be quickly measured without removing the backfill layer at the measuring point position. And the measurement efficiency is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of paving thickness measurement, in particular to a backfill layer thickness measurement tool. Background Art

[0002] In the construction process of thin backfill (such as outdoor ground) in municipal engineering, garden engineering and house construction, some gravel, sand and soil are often backfilled. The backfill process often needs to check the laying thickness to ensure the construction quality. In the existing construction process, simple measuring tools such as tape measures and steel rulers are usually used for measurement. However, during the inspection, a certain thickness needs to be shaved off the measuring point position of the laid backfill layer so that the measuring tool can be inserted into the measuring point. The measurement process is relatively cumbersome, and the measurement accuracy and efficiency are low. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing backfill layer thickness measurement process is relatively complicated and has low measurement accuracy and measurement efficiency.

[0004] In order to solve the above problem, the present invention provides a measurement tool capable of improving the measurement efficiency of the backfill layer, and the specific solution is: A tool for measuring the thickness of a rebound layer comprises a measuring cylinder, a measuring rod is inserted into the measuring cylinder, and the top of the measuring rod is fixedly connected to the measuring cylinder, a limiting cylinder is movably sleeved at the lower part of the measuring rod, the top of the limiting cylinder is located in the measuring cylinder, the bottom of the limiting cylinder is used to abut against the surface of a backfill layer of thickness to be measured, the measuring rod below the limiting cylinder is used to be inserted into the backfill layer, a spring is connected between the top of the limiting cylinder and the top of the measuring cylinder; a visual window is opened on the side wall of the measuring cylinder, and the visual window is engraved with scale values ​​that decrease successively from top to bottom, and when the spring is in a natural state, the top of the limiting cylinder corresponds to the minimum scale value position of the visual window.

[0005] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: The measuring tool of the present invention can quickly and accurately measure the thickness of the backfill layer. When in use, the measuring tool is placed on the backfill layer to be measured. At this time, the top of the limiting cylinder corresponds to the minimum scale value position of the visual window. The measuring rod is pressed downward so that the bottom of the measuring rod is gradually inserted into the backfill layer, and the measuring cylinder moves downward synchronously. During this process, the limiting cylinder remains stationary under the reaction force of the backfill layer surface, so that a displacement difference is generated between the top of the limiting cylinder and the measuring cylinder. By observing the scale position of the visual window corresponding to the top of the limiting cylinder, the depth of the measuring rod inserted into the backfill layer can be known, thereby quickly measuring the thickness of the backfill layer, and there is no need to remove the backfill layer at the measuring point position, thereby further improving the measurement efficiency.

[0006] Preferably, a further technical solution of the present invention is: A limit ring is fixed on the limit cylinder inside the measuring cylinder, and an observation ring is fixed on the top of the limit cylinder above the limit ring. The observation ring contacts the inner wall of the visual window. When the spring is in a natural state, the limit ring abuts against the inner wall of the bottom of the measuring cylinder, and the observation ring corresponds to the minimum scale value position of the visual window. The limit ring can fix the position of the measuring cylinder and the limit cylinder, and at the same time, prevent the limit cylinder from falling out of the measuring cylinder. Setting the observation ring helps to observe the corresponding scale value.

[0007] A conical probe is arranged at the bottom of the measuring rod below the limiting cylinder, and the probe and the bottom of the measuring rod are used to be inserted into the backfill layer of the thickness to be measured. The conical probe facilitates driving the measuring rod to be inserted into the backfill layer.

[0008] A touch plate is fixed at the bottom of the limit cylinder, and the measuring rod extends downward through the touch plate, and the touch plate is used to abut against the surface of the backfill layer whose thickness is to be measured. The bottom area of ​​the limit cylinder is increased by the touch plate, so that the bottom of the limit cylinder can abut firmly on the surface of the backfill layer.

[0009] The top of the measuring rod outside the measuring tube is connected with a grip, and the surface of the grip is covered with a rubber sleeve. The grip facilitates the downward and upward movement of the measuring rod, and the rubber sleeve increases the friction of the grip, thereby increasing the comfort of holding the grip. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of the measuring tube according to an embodiment of the present invention; Figure 3 is a schematic diagram of a measurement start state of an embodiment of the present invention; Figure 4 is a schematic diagram of a measurement completion state of an embodiment of the present invention; In the figure: 1. handle; 11. rubber sleeve; 2. measuring rod; 21. probe; 3. measuring tube; 31. viewing window; 32. spring; 33. observation circle; 34. limit ring; 4. limit tube; 5. touch plate; 6. backfill layer; 7. hard base layer. DETAILED DESCRIPTION

[0011] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0012] See attached Figure 1-4The embodiment of the present invention discloses a tool for measuring the thickness of a rebound layer, comprising a hollow cylindrical measuring tube 3, in which a measuring rod 2 is inserted, specifically, the top of the measuring rod 2 is fixedly connected to the position where the measuring tube 3 is plugged, a limiting tube 4 is movably sleeved on the lower part of the measuring rod 2, the outer diameter of the limiting tube 4 is smaller than the inner diameter of the measuring tube 3, the top of the limiting tube 4 is located inside the measuring tube 3, a through hole slightly smaller than the outer diameter of the limiting tube 4 is opened on the bottom plate of the measuring tube 3, so that the limiting tube 4 can move vertically in the through hole, so that the upper part of the limiting tube 4 can move in the measuring tube 3, and the bottom of the limiting tube 4 The part is used to abut against the surface of the backfill layer 6 whose thickness is to be measured, and the measuring rod 2 under the limiting cylinder 4 is used to be inserted into the backfill layer 6. A spring 32 is movably sleeved on the measuring rod 2 between the top of the limiting cylinder 4 and the top of the measuring cylinder 3, and the two ends of the spring 32 are respectively fixedly connected to the inner wall of the top of the measuring cylinder 3 and the top of the limiting cylinder 4; a transparent visual window 31 is opened on the side wall of the measuring cylinder 3, and the visual window 31 is engraved with scale values ​​that decrease successively from top to bottom. When the spring 32 is in a natural state, the top of the limiting cylinder 4 corresponds to the minimum scale value position of the visual window 31, that is, the lowest position of the visual window 31.

[0013] In this embodiment, a stop ring 34 is fixedly sleeved on the upper part of the stop cylinder 4 located inside the measuring cylinder 3, and the outer diameter of the stop ring 34 is larger than the aperture of the through hole. An observation ring 33 is fixedly sleeved on the top of the stop cylinder 4 above the stop ring 34, and the lower end of the spring 32 is fixed to the top surface of the observation ring 33. The outer diameter of the observation ring 33 is equal to the inner diameter of the measuring cylinder 3, so that the observation ring 33 can contact the position of the visual window 31, and it is convenient to know the thickness of the backfill layer 6 by observing the position of the scale on the visual window 31 corresponding to the observation ring 33. When the spring 32 is in a natural state, the stop ring 34 abuts against the bottom plate of the outer periphery of the through hole of the measuring cylinder 3, and the observation ring 33 corresponds to the minimum scale value position of the visual window 31. The position of the measuring cylinder 3 and the stop cylinder 4 can be fixed by the stop ring 34, and at the same time, the stop cylinder 4 is prevented from escaping from the measuring cylinder 3, and the setting of the observation ring 33 is helpful to observe the corresponding scale value.

[0014] In this embodiment, a conical probe 21 is provided at the bottom of the measuring rod 2 located below the limiting cylinder 4, the tip of the probe 21 is facing downward, and the probe 21 and the bottom of the measuring rod 2 are used to be inserted into the backfill layer 6 of the thickness to be measured. The conical probe 21 facilitates driving the measuring rod 2 to be inserted into the backfill layer 6.

[0015] In this embodiment, a touch plate 5 is fixed to the bottom of the limit tube 4, a through hole is opened in the middle of the touch plate 5, the measuring rod 2 is passed through the through hole and is arranged on the touch plate 5, and the bottom surface of the touch plate 5 is used to abut against the surface of the backfill layer 6 whose thickness is to be measured. The bottom area of ​​the limit tube 4 is increased by the touch plate 5, so that the bottom of the limit tube 4 can be stably abutted against the surface of the backfill layer 6.

[0016] In this embodiment, the top of the measuring rod 2 outside the measuring tube 3 is connected with a grip 1, the grip 1 and the measuring rod 2 are vertically arranged, and the surface of the grip 1 is covered with a rubber sleeve 11. The grip 1 facilitates the downward and upward movement of the measuring rod 2 by holding the measuring rod, thereby driving the measuring tube 3 to move vertically, and the friction of the grip 1 is increased by the rubber sleeve 11, thereby increasing the comfort of holding the grip 1.

[0017] The measuring tool of the present invention can measure the thickness of the backfill layer 6 quickly and accurately. When in use, the operator holds the measuring tool and places it on the backfill layer 6 to be measured. At this time, the top of the limit tube 4 corresponds to the position of the minimum scale value of the visual window 31. Then, the operator holds the handle 1 and slowly presses the measuring rod 2 downward, so that the bottom of the measuring rod 2 is gradually inserted into the backfill layer 6. If the insertion is not smooth, the operator can slightly insert and pull it out a few times to allow the probe 21 to drive the measuring rod 2 to insert into the backfill layer 6. During the insertion process, the measuring tube 3 moves downward synchronously with the measuring rod 2, and the limit tube 4 is resisted by the bottom touch plate 5. The limiting cylinder 4 keeps stationary on the surface of the backfill layer 6, so that the limiting cylinder 4 drives the top observation circle 33 to gradually move upward. When the measuring rod 2 reaches the hard base layer 7, it cannot be inserted further. At this time, by observing the scale position of the visual window 31 corresponding to the top of the limiting cylinder 4, the depth of the measuring rod 2 inserted into the backfill layer 6, that is, the laying thickness of the backfill layer 6, can be known, so that the thickness of the backfill layer 6 can be quickly measured, and the backfill layer 6 at the measuring point position does not need to be planed, which further improves the measurement efficiency. After the thickness measurement of this point is completed, the thickness measurement of the next point can be carried out. The tool of this embodiment is simple to operate, can be completed by one person, does not require the cooperation of other personnel, and has high detection efficiency.

[0018] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A tool for measuring the thickness of a rebound layer, characterized in that: It includes a measuring cylinder, a measuring rod is passed through the measuring cylinder, and the top of the measuring rod is fixedly connected to the measuring cylinder, a limiting cylinder is movably sleeved at the lower part of the measuring rod, the top of the limiting cylinder is located in the measuring cylinder, the bottom of the limiting cylinder is used to abut against the surface of the backfill layer of the thickness to be measured, the measuring rod below the limiting cylinder is used to be inserted into the backfill layer, and a spring is connected between the top of the limiting cylinder and the top of the measuring cylinder; a visual window is opened on the side wall of the measuring cylinder, and the visual window is engraved with scale values ​​that decrease successively from top to bottom, and when the spring is in a natural state, the top of the limiting cylinder corresponds to the minimum scale value position of the visual window.

2. The rebound layer thickness measuring tool according to claim 1, characterized in that: A limit ring is fixed on the limit cylinder inside the measuring cylinder, and an observation ring is fixed on the top of the limit cylinder above the limit ring. The observation ring contacts the inner wall of the visual window. When the spring is in a natural state, the limit ring abuts against the inner wall of the bottom of the measuring cylinder, and the observation ring corresponds to the minimum scale value position of the visual window.

3. The tool for measuring the thickness of the rebound layer according to claim 1, characterized in that: A conical probe is arranged at the bottom of the measuring rod below the limiting cylinder, and the probe and the bottom of the measuring rod are used to be inserted into the backfill layer of the thickness to be measured.

4. The tool for measuring the thickness of the rebound layer according to claim 1, characterized in that: A touch plate is fixed at the bottom of the limiting cylinder, and the measuring rod extends downward through the touch plate. The touch plate is used to abut against the surface of the backfill layer whose thickness is to be measured.

5. The tool for measuring the thickness of the rebound layer according to claim 1, characterized in that: The top of the measuring rod located outside the measuring tube is connected with a handle, and the surface of the handle is covered with a rubber sleeve.

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