Concrete shrinkage and dilatometer

Abstract

The utility model discloses a concrete shrinkage dilatometer which comprises a supporting base, a shrinkage dilatometer detection mechanism and a loading and unloading mechanism, the shrinkage dilatometer detection mechanism and the loading and unloading mechanism are both installed at the upper end of the supporting base, a screw is rotationally arranged in the middle of the inner wall of the supporting base, the outer wall of the screw is in threaded connection with a sleeve, and a connecting rod is rotationally arranged at the top of the sleeve. A limiting sliding groove is formed in the other side of the top of the concrete containing plate, and a supporting frame is slidably arranged on the inner wall of the limiting sliding groove. According to the utility model, a concrete block is placed on the concrete placing plate, the support frame abuts against one side of the concrete under the elasticity of the second spring, then the gasket is pulled up to be cushioned above the concrete, and the shrinkage and expansion values of the concrete can be directly obtained according to the change positions of pointers at the upper ends of the support frame and the gasket in a scale area. And meanwhile, the concrete blocks are conveniently loaded and unloaded through lifting of the base plate and rolling of the roller shaft, operation is more labor-saving, and therefore the overall use convenience of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concrete shrinkage and expansion detection, and specifically relates to a concrete shrinkage and expansion instrument. BACKGROUND

[0002] The concrete shrinkage and expansion instrument is used for measuring the length (volume) change of a concrete test piece under specified temperature and humidity conditions, and with the development of modern building industry, the quality requirement of concrete used in building construction is higher and higher, and before the concrete is put into use, the shrinkage and expansion rate of the concrete is detected by using such a concrete shrinkage and expansion instrument, so that the concrete can be normally put into use only when the shrinkage and expansion rate reaches a safe value range.

[0003] To this end, the Chinese patent number CN217332469U proposes a concrete shrinkage and expansion instrument, which can adjust the inclination angle of the placement detection platform by adjusting the angle adjusting mechanism, drive the movable mounting block to deflect on the outer side of the surface of the fixed connecting rod, and make the placement detection platform horizontal through the action of the angle adjusting mechanism, so that the angle of concrete detection is variable and the practicability is high.

[0004] Although the above technical solution can adjust different inclination angles of the concrete and detect the shrinkage and expansion of the concrete in different inclination angles, the change of the length and volume of the concrete cannot be intuitively observed during the detection of the shrinkage and expansion instrument, and the change amount of the concrete can be obtained only after the change of the length and volume of the concrete is measured by the staff manually using a measuring tool and compared with the initial data, which is very troublesome. In addition, the concrete is heavy, and the staff needs to move the concrete to the equipment for each measurement, which is very laborious. Therefore, the convenience of using the device is reduced. To solve the above problems, the present design proposes a concrete shrinkage and expansion instrument. UTILITY MODEL CONTENTS

[0005] To solve the above problems, the utility model aims to provide a concrete shrinkage and expansion instrument to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model proposes a concrete shrinkage and expansion instrument, which comprises a supporting base, a shrinkage and expansion detection mechanism and a loading and unloading mechanism both installed on the upper end of the supporting base.

[0007] The shrinkage and expansion detection mechanism comprises a concrete placing plate rotatably arranged at the upper edge of one side of the inner wall of a support base, a screw rod rotatably arranged at the middle position of the inner wall of the support base, a sleeve threadedly connected to the outer wall of the screw rod, a connecting rod rotatably arranged at the top of the sleeve, and the bottom of the connecting rod being rotatably connected to the bottom of the concrete placing plate.

[0008] In one example, a first spring is fixedly arranged at the bottom of the inner wall of the support frame, and the bottom of the gasket is fixedly connected to one end of the first spring; a second spring is fixedly arranged at one side of the inner wall of the limiting sliding groove, and one end of the second spring is fixedly connected to one side of the support frame.

[0009] In one example, a rotating handle is connected to one end of the screw rod through the outer wall of one side of the support base; a fixing bolt is threadedly connected to one side of the top of the concrete placing plate, and the outer wall of one end of the fixing bolt is in contact with the outer wall of one side of the limiting plate through the inner wall of the concrete placing plate; and universal wheels are fixedly arranged at the four corners of the bottom of the support base.

[0010] In one example, the loading and unloading mechanism comprises three connecting sliding grooves arranged at one side of the outer wall of the support base, a fixing support slidably arranged between the inner walls of two of the connecting sliding grooves, and the outer wall of one end of the fixing support being slidably connected to the inner wall of the other connecting sliding groove; and a screw rod is rotatably arranged at the inner wall of each of the two connecting sliding grooves.

[0011] In one example, the outer walls of the two screw rods are threadedly connected to the inner walls of the two ends of the fixing support, chain wheels are connected to the two sides of the bottom of the support base through one end of each of the two screw rods, and a chain is engaged between the outer walls of the two chain wheels.

[0012] In one example, a pad plate is fixedly arranged at the top of the fixing support, a plurality of roller shafts are rotatably arranged at the top of the pad plate at equal distances, a motor is arranged at the corner of one side of the top of the support base, and the other end of one of the screw rods is fixedly connected to the output end of the motor.

[0013] In one example, a control panel is fixedly arranged at one side of the support base, and the motor is electrically connected to an external power supply through the control panel.

[0014] The concrete shrinkage and expansion instrument can bring the following beneficial effects:

[0015] The concrete shrinkage and expansion instrument is characterized in that: the concrete block is placed on the concrete placing plate, the supporting frame is abutted against one side of the concrete under the elasticity of the second spring, and the other side is abutted against and limited by the limiting plate, then the gasket is pulled up and placed above the concrete, the value of the concrete shrinkage and expansion can be directly obtained according to the changing position of the supporting frame and the upper end pointer of the gasket in the scale area, without manual measurement and statistics by the staff, meanwhile, the concrete block is conveniently loaded and unloaded through the lifting of the pad plate and the rolling of the roller shaft, the operation is more labor-saving, and the convenience of the overall use of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the whole present application;

[0018] Figure 2 It is a structural schematic diagram of the inside of the supporting base of the present application;

[0019] Figure 3 It is a structural schematic diagram of the enlarged A part in the specification of the present application; Figure 2

[0020] Figure 4 It is a structural schematic diagram of the loading and unloading mechanism of the present application.

[0021] In the drawings: 1, supporting base; 2, shrinkage and expansion detection mechanism; 201, concrete placing plate; 202, screw rod; 203, sleeve; 204, connecting rod; 205, storage groove; 206, limiting plate; 207, limiting sliding groove; 208, supporting frame; 209, gasket; 210, first spring; 211, second spring; 3, rotating handle; 4, fixing bolt; 5, universal wheel; 6, loading and unloading mechanism; 601, connecting sliding groove; 602, fixed support; 603, screw rod; 604, chain wheel; 605, chain; 606, pad plate; 607, roller shaft; 7, motor. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail in an exemplary manner combined with the drawings of the specification.

[0023] The embodiments are as follows:

[0024] The present application provides a concrete shrinkage and expansion instrument Figures 1-4 ​The concrete shrinkage and expansion instrument shown comprises a supporting base 1, a shrinkage and expansion detection mechanism 2 and a loading and unloading mechanism 6 which are all mounted on the upper end of the supporting base 1;

[0025] The shrinkage and expansion detection mechanism 2 comprises a concrete placing plate 201 rotatably mounted on the upper edge of one side of the inner wall of the supporting base 1, a screw rod 202 rotatably arranged at the middle position of the inner wall of the supporting base 1, a sleeve 203 threadedly connected to the outer wall of the screw rod 202, a connecting rod 204 rotatably arranged at the top of the sleeve 203, one end of the connecting rod 204 being rotatably connected to the bottom of the concrete placing plate 201, a receiving groove 205 being formed in one side of the top of the concrete placing plate 201, a limiting plate 206 being rotatably arranged on the inner wall of the receiving groove 205, a limiting sliding groove 207 being formed in the other side of the top of the concrete placing plate 201, a supporting frame 208 being slidably arranged on the inner wall of the limiting sliding groove 207, a gasket 209 being slidably arranged on the inner wall of the supporting frame 208, a pointer being arranged on the edge side of the supporting frame 208 and the gasket 209, and a scale line being arranged on the top of the concrete placing plate 201 and one side of the supporting frame 208, after the concrete is placed, the position of the concrete is limited by the limiting plate 206 on one side, and the supporting frame 208 is abutted against the side surface of the concrete due to the elastic action of the second spring 211 on the other side, and the gasket 209 is abutted against the top of the concrete due to the elastic action of the first spring 210, when the concrete expands and shrinks, the position of the pointer on the scale line will change, thereby facilitating the workers to directly obtain the change data of the shrinkage and expansion, and rotating the screw rod 202 can make the sleeve 203 move, thereby making the connecting rod 204 fold and rotate to change the inclination angle of the concrete placing plate 201;

[0026] Further, the first spring 210 is fixedly arranged on the bottom of the inner wall of the supporting frame 208, one end of the first spring 210 being fixedly connected to the bottom of the gasket 209, the second spring 211 is fixedly arranged on one side of the inner wall of the limiting sliding groove 207, one end of the second spring 211 being fixedly connected to one side of the supporting frame 208, and the limiting sliding groove 207 has a limiting action on the supporting frame 208, so that the supporting frame 208 cannot be separated from the limiting sliding groove 207;

[0027] Further, one end of the screw rod 202 is connected with a rotating handle 3 through the outer wall of one side of the supporting base 1, a fixed bolt 4 is threadedly connected to one side of the top of the concrete placing plate 201, the outer wall of one end of the fixed bolt 4 is in contact with the outer wall of one side of the limiting plate 206 through the inner wall of the concrete placing plate 201, universal wheels 5 are fixedly arranged at the four corners of the bottom of the supporting base 1, after the limiting plate 206 is rotatably erected in the receiving groove 205, the limiting plate 206 can be fixed by screwing the fixed bolt 4 to press it, and when loading, the limiting plate 206 is rotatably stored in the receiving groove 205, so that it does not block the movement of the concrete on the concrete placing plate 201;

[0028] Further, the loading and unloading mechanism 6 comprises three connecting sliding grooves 601 opened on one side of the outer wall of the support base 1, the inner walls of two connecting sliding grooves 601 are slidably provided with a fixed support 602, and the outer wall of one end of the fixed support 602 is slidably connected with the inner wall of the other connecting sliding groove 601, the inner walls of the two connecting sliding grooves 601 are rotatably provided with a lead screw 603, the fixed support 602 is provided at the bottom of the support pad 606, so that the pad 606 is more stable when supporting the lifting of the concrete block.

[0029] The outer walls of the two lead screws 603 are respectively threadedly connected with the inner walls of the two ends of the fixed support 602, one end of each of the two lead screws 603 is connected with a chain wheel 604 through the two sides of the bottom of the support base 1, and the outer walls of the two chain wheels 604 are engaged with a chain 605.

[0030] The top of the fixed support 602 is fixedly provided with a pad 606, a plurality of roller shafts 607 are rotatably provided on the top of the pad 606 at equal distances, a motor 7 is installed on one side of the top corner of the support base 1, the other end of one of the lead screws 603 is fixedly connected with the output end of the motor 7, and a plurality of roller shafts 607 are rotatably installed on the pad 606, so that it is more labor-saving when pushing the concrete to the concrete placing plate 201, and it is easier to carry to the pad 606 for unloading when unloading later under the rolling of the roller shafts 607.

[0031] Working principle: when the concrete shrinkage and expansion instrument in the design scheme is used, firstly, the motor 7 is started to make the screw rod 603 rotate with the fixed support 602 sliding in the connecting sliding groove 601 under the meshing of the chain wheel 604 and the chain 605, then the concrete is lifted to the pad plate 606 after descending to the lowest point, then the motor 7 is reversely driven to make the pad plate 606 slide up in the connecting sliding groove 601 through the fixed support 602, until the pad plate 606 is flush with the concrete placing plate 201 on the top of the supporting base 1, the concrete block is moved to the concrete placing plate 201 through the rolling of the roller shaft 607, after position adjustment, the fixed bolt 4 is loosened to turn out the limiting plate 206 from the storage groove 205 and stand up, then the fixed bolt 4 is used to fix it, one side of the concrete is abutted against one side of the limiting plate 206, at this time, the supporting frame 208 is abutted against the other side of the concrete, and the elastic force of the second spring 211 is used to tightly adhere to one side of the concrete, after the concrete experiences high temperature and low temperature in the natural environment, the movement change of the pointer on one side of the supporting frame 208 in the scale area on the concrete placing plate 201 can directly obtain the length change amount of the concrete, at the same time, the gasket 209 is padded on the top of the concrete, and the position change of the pointer on one side of the supporting frame 208 in the scale area can directly obtain the thickness change range of the concrete, without the manual loading and unloading of the staff in the later stage, the length and size change amount of the concrete can be directly obtained without the need of counting the concrete shrinkage and expansion data, the convenience of the device is improved, and in the detection process, the rotating handle 3 can be rotated to rotate the screw rod 202, and then the sleeve 203 is moved to make the connecting rod 204 fold and shrink, so that the concrete placing plate 201 supported by the connecting rod 204 is rotated on the supporting base 1, and the inclination angle of the concrete placing plate 201 is changed, so that the concrete can be detected on different inclination angles.

[0032] Each embodiment in the specification is described in a progressive manner, and the same and similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments. Especially, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can be referred to the part of the method embodiment.

[0033] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A concrete shrinkage and expansion instrument, comprising a supporting base (1), a shrinkage and expansion detection mechanism (2) and a loading and unloading mechanism (6) which are both mounted on the upper end of the supporting base (1). characterized in that The shrinkage and expansion detection mechanism (2) comprises a concrete placement plate (201) rotatably mounted on the upper edge of one side of the inner wall of the supporting base (1), a screw rod (202) rotatably arranged at the middle position of the inner wall of the supporting base (1), a sleeve (203) threadedly connected to the outer wall of the screw rod (202), a connecting rod (204) rotatably arranged at the top of the sleeve (203), and one end of the connecting rod (204) rotatably connected to the bottom of the concrete placement plate (201), a receiving groove (205) formed on one side of the top of the concrete placement plate (201), a limiting plate (206) rotatably arranged on the inner wall of the receiving groove (205), a limiting sliding groove (207) formed on the other side of the top of the concrete placement plate (201), a supporting frame (208) slidably arranged on the inner wall of the limiting sliding groove (207), and a gasket (209) slidably arranged on the inner wall of the supporting frame (208).

2. A concrete shrinkage and swelling meter according to claim 1, characterized in that: A first spring (210) is fixedly arranged on the bottom of the inner wall of the supporting frame (208), and one end of the first spring (210) is fixedly connected to the bottom of the gasket (209). A second spring (211) is fixedly arranged on one side of the inner wall of the limiting sliding groove (207), and one end of the second spring (211) is fixedly connected to one side of the supporting frame (208).

3. A concrete shrinkage and swelling meter according to claim 1, wherein: One end of the screw rod (202) is connected with a rotating handle (3) penetrating through the outer wall of one side of the supporting base (1). A fixing bolt (4) is threadedly connected to one side of the top of the concrete placement plate (201), and the outer wall of one end of the fixing bolt (4) is in contact with the outer wall of one side of the limiting plate (206) penetrating through the inner wall of the concrete placement plate (201). Four universal wheels (5) are fixedly arranged at the four corners of the bottom of the supporting base (1).

4. A concrete shrinkage and swelling meter according to claim 1, wherein: The loading and unloading mechanism (6) comprises three connecting sliding grooves (601) formed on one side of the outer wall of the supporting base (1), a fixing support (602) slidably arranged between the inner walls of two of the connecting sliding grooves (601), and the outer wall of one end of the fixing support (602) slidably connected with the inner wall of the other connecting sliding groove (601). A lead screw (603) is rotatably arranged on the inner wall of each of the two connecting sliding grooves (601).

5. A concrete shrinkage and swelling meter according to claim 4, wherein: The outer walls of the two lead screws (603) are threadedly connected with the inner walls of the two ends of the fixing support (602). Chain wheels (604) are connected with one end of each of the two lead screws (603) penetrating through the two sides of the bottom of the supporting base (1). A chain (605) is engaged between the outer walls of the two chain wheels (604).

6. A concrete shrinkage and swelling meter according to claim 5, wherein: A pad (606) is fixedly mounted on the top of the fixing support (602). A plurality of roller shafts (607) are rotatably arranged on the top of the pad (606) at equal distances. A motor (7) is mounted at the corner of one side of the top of the supporting base (1), and the other end of one of the lead screws (603) is fixedly connected with the output end of the motor (7).

7. A concrete shrinkage and swelling meter according to claim 6, characterised in that: The support base (1) is fixed with a control panel on one side, and the motor (7) is electrically connected with the external power supply through the control panel.

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