Concrete condensation state measuring pen and use method thereof

Abstract

The invention relates to a concrete setting state measuring pen and a using method thereof, and belongs to the technical field of concrete testing equipment.The measuring pen comprises a shell, a trocar, a center needle, a balancing weight and an impact spring, the balancing weight is arranged in the shell in a sliding mode, the top end of the trocar is connected with the balancing weight, and the bottom end of the trocar movably penetrates through the bottom of the shell downwards; the impact spring is arranged at the top of the shell, the top end of the center needle is connected with the impact spring, the bottom end of the center needle movably penetrates through the balancing weight downwards and then is connected into the trocar in a penetrating mode, the shell is provided with a side window with a ruler, and the center needle is provided with a marking line matched with the ruler. The insertion depth of the trocar is observed, when the trocar and the center needle are inserted into the concrete, the concrete is in an uncondensed state, when the trocar cannot be completely inserted into the concrete, and the center needle is almost completely inserted into the concrete, the concrete is in an initial condensation state, and when the trocar and the center needle cannot be inserted into the concrete, the concrete is in a final condensation state.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete testing equipment, and in particular relates to a concrete setting state measuring pen and a use method thereof. Background Art

[0002] In the laboratory, concrete penetration resistance meter is often used. The method specified in the national standard "Standard for Performance Test Method of Ordinary Concrete Mixture" is used to determine the setting time or state of concrete. The experimenter needs to wait in front of the equipment for a long time to test. However, the setting time is rarely paid attention to at the concrete construction site. With the increase in special concrete projects, especially the large-scale use of slow-setting concrete and super-slow-setting concrete, it becomes very necessary to measure the setting state of concrete on site to provide guidance for the next construction steps. However, the above-mentioned concrete penetration resistance meter or concrete setting time automatic measuring instrument are all equipment used in laboratory tests. At the same time, samples need to be prepared separately, which is not suitable for testing at the project site. At present, the on-site test of the setting state of concrete still uses relatively simple methods such as finger pressing and steel bar poking, which is difficult to quantify.

[0003] Therefore, a portable concrete setting state measuring pen suitable for measuring the setting state of concrete at a construction site and a method for using the same are in urgent need of appearance. Summary of the invention

[0004] The invention provides a concrete setting state measuring pen and a use method thereof, which are used to solve the technical problem that there is no device suitable for on-site quantitative measurement of the concrete setting state in the prior art.

[0005] The present invention is achieved through the following technical scheme: a concrete setting state measuring pen and a method of using the same, comprising a shell, a trocar, a center needle, a counterweight and an impact spring, wherein the counterweight can be slidably arranged in the shell, the top end of the trocar is connected to the counterweight and the bottom end is movably passed through the bottom of the shell, the impact spring is arranged on the top of the shell, the top end of the center needle is connected to the impact spring and the bottom end is movably passed through the counterweight and then connected to the trocar, the shell is provided with a side window with a scale, and the center needle is provided with a marking line matching the scale.

[0006] In order to better implement the present invention, further optimization is made in the above structure, and the impact spring is a compression spring.

[0007] In order to better realize the present invention, further optimization is made in the above structure, the counterweight block is an annular structure, and there is a clearance fit between the counterweight block and the inner wall of the shell, and between the counterweight block and the outer wall of the center needle.

[0008] In order to better implement the present invention, the above structure is further optimized to further include a shell cover, which is detachably connected to the top of the outer shell, and the top end of the compression spring is fixedly connected to the shell cover.

[0009] In order to better implement the present invention, further optimization is made in the above structure, and the center needle is a solid needle.

[0010] In order to better implement the present invention, the above structure is further optimized to further include a ring plate, and the ring plate is fixed to the bottom of the shell.

[0011] In order to better implement the present invention, the above structure is further optimized to include a stopper for limiting the highest sliding position of the counterweight block. The outer shell is provided with an embedding hole, and the stopper is embedded in the embedding hole and partially extends into the outer shell.

[0012] A method for using a concrete setting state measuring pen, comprising:

[0013] Step 1, recording the top height position of the counterweight block as H1, the initial height position of the marking line of the center needle as H2, and the length S of the trocar extending out of the housing;

[0014] Step 2, holding a measuring pen, and inserting the trocar into the concrete at intervals of time t, and after the trocar is stationary, recording the height position of the top of the counterweight block, recorded as h1, and the height position of the marking line of the center needle, recorded as h2;

[0015] Step three, when h1-H1≈0, the concrete is completely in a flowing state and has a very low viscosity; when h1-H1<S, the concrete enters the initial setting state; when h1-H1=S and h2-H2≈0, the time at this time is the initial setting time of the concrete, and the concrete ends the initial setting state; when h2-H2<S, the concrete begins to further final setting and condense from the initial setting state; when h2-H2=S, the concrete is in the final setting state.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The concrete setting state measuring pen provided by the present invention comprises a shell, a cannula needle, a center needle, a counterweight block and an impact spring, the counterweight block can be slidably arranged in the shell, the top end of the cannula needle is connected to the counterweight block and the bottom end movably passes through the bottom of the shell, the impact spring is arranged on the top of the shell, the top end of the center needle is connected to the impact spring and the bottom end movably passes through the counterweight block and then is connected to the cannula needle, the shell is provided with a side window with a ruler, and the center needle is provided with a marking line matching the ruler. With this structure, the marking line is used to observe the insertion depth of the center needle, the position of the cannula needle passing through the top of the counterweight block is observed, the cannula needle applies penetration resistance during initial setting of concrete through the counterweight block, and the center needle applies penetration resistance during final setting of concrete through the impact spring. When the cannula needle penetrates into the concrete, due to different states of the concrete, the insertion positions of the center needle and the cannula needle are different, so as to understand the setting state of the concrete until the cannula needle and the center needle cannot penetrate and reach the final setting state. The operation is convenient and suitable for on-site operation testing.

[0018] The present invention also provides a method for using a concrete setting state measuring pen, comprising:

[0019] Step 1, recording the top height position of the counterweight block as H1, the initial height position of the marking line of the center needle as H2, and the length S of the trocar extending out of the housing;

[0020] Step 2, holding a measuring pen, and inserting the trocar into the concrete at intervals of time t, and after the trocar is stationary, recording the height position of the top of the counterweight block, recorded as h1, and the height position of the marking line of the center needle, recorded as h2;

[0021] Step three, when h1-H1≈0, the concrete is completely in a flowing state and has a very low viscosity; when h1-H1<S, the concrete enters the initial setting state; when h1-H1=S and h2-H2≈0, the time at this time is the initial setting time of the concrete, and the concrete ends the initial setting state; when h2-H2<S, the concrete begins to further final setting and condense from the initial setting state; when h2-H2=S, the concrete is in the final setting state.

[0022] By adopting this method, it is possible to quickly and quantitatively determine whether the concrete is in a state before initial setting, initial setting or final setting. If both the center needle and the trocar needle are almost completely inserted into the concrete, the concrete is in an unset state; if the trocar needle cannot be completely inserted, but the center needle can be almost completely inserted, the concrete is in an initial setting state; if both needles cannot be inserted, the concrete is in a final setting state. This makes it convenient for construction personnel to arrange and guide the construction steps required under different states, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is the internal structure diagram of the concrete setting state measuring pen in the present invention;

[0025] Figure 2 It is a front view of the concrete setting state measuring pen in the present invention;

[0026] Figure 3 It is a schematic diagram of the concrete setting state measuring pen measuring the concrete before the initial setting state;

[0027] Figure 4 This is a schematic diagram of the concrete setting state measuring pen measuring the concrete to be in the initial setting state;

[0028] Figure 5 It is a schematic diagram of the concrete setting state measuring pen measuring the concrete to be in the final setting state.

[0029] In the figure:

[0030] 1-housing; 2-trocar; 3-center needle; 4-counterweight; 5-side window; 6-marking line; 7-ruler; 8-compression spring; 9-housing cover; 10-ring plate; 11-stopper. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1:

[0035] In this embodiment, a concrete setting state measuring pen, such as Figure 1 and Figure 2 As shown, it includes a shell 1, a trocar 2, a center needle 3, a counterweight 4 and an impact spring. Specifically, the counterweight 4 is slidably arranged in the shell 1, the top end of the trocar 2 is connected to the counterweight 4 and the bottom end is movably passed through the bottom of the shell 1. When the concrete has not been finally set, the counterweight 4 can completely or partially press the trocar 2 into the concrete, and the unpierced part of the trocar 2 returns to the shell 1. At this time, the counterweight 4 slides upward, and the impact spring is arranged on the top of the shell 1. The top end of the center needle 3 is connected to the impact spring and the bottom end is movably passed through the counterweight 4 and then connected to the trocar 2. The impact spring can provide variable force to push the center needle 3 into the concrete. The shell 1 is provided with a side window 5 with a scale 7, and the center needle 3 is provided with a marking line 6 matching the scale 7.

[0036] By adopting this structure, the mark 6 is used to observe the insertion depth of the center needle 3, the position of the trocar 2 passing through the top of the counterweight block 4, and the insertion depth of the trocar 2 is observed. The trocar 2 applies penetration resistance during initial setting of concrete through the counterweight block 4, and the center needle 3 applies penetration resistance during final setting of concrete through the impact spring. When the trocar 2 penetrates into the concrete, the insertion positions of the center needle 3 and the trocar 2 are different due to the different states of the concrete, so as to understand the setting state of the concrete, until the trocar 2 and the center needle 3 cannot penetrate and reach the final setting state. The operation is convenient and suitable for on-site operation testing.

[0037] In this embodiment, Figure 1As shown, the impact spring is a compression spring 8, and the elastic coefficient of the compression spring 8 is set according to the GB / T 50080 standard, and the value is that when the center needle 3 is fully pressed in, the compression spring 8 gives the center needle 3 a penetration resistance of 28 MPa. During operation, the measuring pen is held and the cannula needle 2 is inserted into the concrete with a certain force and speed. At this time, the center needle 3 is pressed upward to the compression spring 8 by inertia, so that the compression spring 8 stores energy until the cannula needle 2 is inserted into the concrete and does not move. The compression spring 8 recovers its deformation and pushes the center needle 3 into the concrete. The center needle 3 is preferably a solid needle with a greater impact force. According to different coagulation conditions of the concrete, the penetration depth of the center needle 3 is also different. The more sufficient the coagulation is, the shallower the penetration depth of the center needle 3 is, so that the position of the center needle 3 is higher than the initial position, so that the mark line 6 forms a height difference compared with its initial position. The greater the height difference is, the more sufficient the coagulation is, so that the coagulation condition of the concrete can be quantified by height information, which is convenient for recording.

[0038] In this embodiment, the above-mentioned counterweight block 4 is an annular structure, and the weight of the above-mentioned counterweight block 4 is set according to the GB / T 50080 standard, so that the penetration resistance of the above-mentioned trocar 2 is 3.5MPa. There is a clearance fit between the above-mentioned counterweight block 4 and the inner wall of the above-mentioned outer shell 1, and between the counterweight block 4 and the outer wall of the center needle 3, so that the above-mentioned counterweight block 4 can slide vertically in the above-mentioned outer shell 1, and the above-mentioned center needle 3 can also be free from vertical vibration without being stuck.

[0039] As an optimization, it also includes a shell cover 9, which is detachably connected to the top of the shell 1, preferably with internal and external threads. The top of the compression spring 8 is fixedly connected to the shell cover 9, which is convenient for disassembly, maintenance, and replacement of parts.

[0040] In this embodiment, Figure 1 As shown, it also includes a ring plate 10, which is fixed to the bottom of the shell 1. The ring plate 10 increases the contact area between the bottom of the shell 1 and the concrete surface, and can prevent the shell 1 from penetrating into the concrete.

[0041] Further, such as Figure 2 As shown, it also includes a stopper 11 for limiting the highest sliding position of the above-mentioned counterweight block 4. The above-mentioned shell 1 is provided with an embedding hole. The above-mentioned stopper 11 is embedded in the above-mentioned embedding hole and partially extends into the above-mentioned shell 1, thereby blocking the above-mentioned counterweight block 4 and preventing the above-mentioned trocar 2 from completely entering the above-mentioned shell 1 and affecting the use.

[0042] Embodiment 2:

[0043] In this embodiment, a method for using a concrete setting state measuring pen is as follows: Figures 3 to 5 Shown, including

[0044] Step 1, recording the height position of the top of the counterweight block as H1, the initial height position of the marking line of the center needle as H2, and the length S of the trocar extending out of the housing;

[0045] Step 2: Hold the measuring pen and pierce the trocar into the concrete at intervals of t. After the trocar is stationary, record the height of the top of the counterweight block as h1 and the height of the mark line of the center needle as h2.

[0046] Step three, when h1-H1≈0, the concrete is completely in a flowing state and has a very low viscosity; when h1-H1<S, the concrete enters the initial setting state; when h1-H1=S and h2-H2≈0, the time at this time is the initial setting time of the concrete, and the concrete ends the initial setting state; when h2-H2<S, the concrete begins to further final setting and condense from the initial setting state; when h2-H2=S, the concrete is in the final setting state.

[0047] By adopting this method, it is possible to quickly and quantitatively determine whether the concrete is in the state before initial setting, initial setting or final setting, so as to facilitate construction personnel to arrange and guide the construction steps required under different states, thereby improving work efficiency; specifically, each time the needle is inserted, it is necessary to ensure that the bottom end of the shell 1 is flush with the concrete surface at one time. At this time, the above-mentioned trocar 2 is in a state of being completely inserted into the concrete, partially inserted into the concrete, partially entered into the shell 1, or fully entered into the shell 1. The measuring pen is kept still. After the above-mentioned center needle 3 is stationary, when the above-mentioned marking line 6 is flush with the initial position, that is, H=h, it means that the above-mentioned center needle 3 is not blocked by the concrete. At this time, the above-mentioned trocar 2 and the center needle 3 are at the maximum depth that can be inserted at the same time, such as Figure 3 As shown, the concrete is in the initial setting state before solidification; when the trocar 2 is not completely inserted into the concrete, and the center needle 3 is almost able to penetrate to the maximum depth, as shown in FIG. Figure 4 As shown, the concrete is in the initial setting state; when the center needle 3 and the trocar 2 are completely blocked by the concrete, the center needle 3 and the trocar 2 can no longer penetrate the concrete, as shown in FIG. Figure 5 As shown, the concrete is in final setting state at this time.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A pen for measuring the setting state of concrete, characterized in that: The invention comprises a shell (1), a trocar (2), a center needle (3), a counterweight (4) and an impact spring. The counterweight (4) is slidably arranged in the shell (1). The top end of the trocar (2) is connected to the counterweight (4) and the bottom end is movable downwardly through the bottom of the shell (1). The impact spring is arranged at the top of the shell (1). The top end of the center needle (3) is connected to the impact spring and the bottom end is movable downwardly through the counterweight (4) and then connected to the trocar (2). The shell (1) is provided with a side window (5) with a scale (7), and the center needle (3) is provided with a marking line (6) matching the scale (7).

2. A concrete setting state measuring pen according to claim 1, characterized in that: The impact spring is a compression spring (8).

3. A concrete setting state measuring pen according to claim 1, characterized in that: The counterweight block (4) is an annular structure, and there is a clearance fit between the counterweight block (4) and the inner wall of the outer shell (1), and between the counterweight block (4) and the outer wall of the center needle (3).

4. A concrete setting state measuring pen according to claim 1, characterized in that: It also comprises a shell cover (9), wherein the shell cover (9) is detachably connected to the top of the outer shell (1), and the top end of the compression spring (8) is fixedly connected to the shell cover (9).

5. The concrete setting state measuring pen according to claim 1, characterized in that: The central needle (3) is a solid needle.

6. The concrete setting state measuring pen according to claim 1, characterized in that: It also comprises a ring plate (10), wherein the ring plate (10) is fixed to the bottom of the housing (1).

7. The concrete setting state measuring pen and the use method thereof according to claim 1, characterized in that: It also includes a stopper (11) for limiting the highest sliding position of the counterweight (4); the outer shell (1) is provided with an embedding hole; the stopper (11) is embedded in the embedding hole and partially extends into the outer shell (1).

8. A method for using a concrete setting state measuring pen, characterized in that: include Step 1, recording the top height position of the counterweight (4) as H1, the initial height position H2 of the marking line (6) of the center needle (3), and the length S of the trocar (2) extending out of the housing (1); Step 2, holding a measuring pen, and inserting the trocar (2) into the concrete at intervals of a period of time t, and after the trocar (2) comes to rest, recording the height position of the top of the counterweight (4), which is recorded as h1, and the height position of the marking line (6) of the center needle (3), which is recorded as h2; Step three, when h1-H1≈0, the concrete is completely in a flowing state and has a very low viscosity; when h1-H1<S, the concrete enters the initial setting state; when h1-H1=S and h2-H2≈0, the time at this time is the initial setting time of the concrete, and the concrete ends the initial setting state; when h2-H2<S, the concrete begins to further final setting and condense from the initial setting state; when h2-H2=S, the concrete is in the final setting state.

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