Dial indicator fixing device and test assembly

Abstract

The utility model discloses a dial indicator fixing device, which relates to the technical field of engineering rock mass and concrete tests and comprises a fixing support, the fixing support comprises an upper support and a lower support, the upper support and the lower support are connected through a plurality of stand columns, and a fixing structure is arranged on the lower support and used for being fixed with a test equipment base. The clamp assembly comprises vertical clamps and horizontal clamps, the vertical clamps are used for vertically and detachably installing dial indicators, the horizontal clamps are used for horizontally and detachably installing dial indicators, and any vertical clamp and any horizontal clamp are arranged on one stand column and can move up and down along the corresponding stand column and rotate around the corresponding stand column; and the measuring heads of the dial gauges on the vertical clamp and the horizontal clamp are in contact with the to-be-tested piece. The utility model further provides a test assembly which comprises the dial indicator and the dial indicator fixing device. According to the utility model, the test efficiency can be improved, and the flexibility is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering rock mass and concrete testing, in particular to a dial gauge fixing device and a testing assembly. Background Art

[0002] Currently, uniaxial compression deformation tests on rock and concrete can use the resistance strain method or the micrometer method to measure axial and radial deformation. Due to the shortcomings of the resistance strain method patch, such as complex installation process and easy damage, the micrometer method is more common.

[0003] Traditionally, micrometer gauges have been secured with magnetic bases. These bases must be fixed to the test equipment, and then the angles of the primary and secondary movable levers must be adjusted to position the micrometer at a specific measuring point. In practice, when measuring four points simultaneously, four magnetic bases are required. Because magnetic bases occupy a large space, installing four bases can interfere with normal test operations. Furthermore, some test equipment has problems with the magnetic bases finding a secure location.

[0004] Generally speaking, existing dial indicator fixing devices have problems such as being restricted by environmental conditions, occupying a large space, and being difficult to install. Therefore, it is urgent to provide a dial indicator fixing device to solve the above problems existing in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a dial indicator fixing device and a test assembly to solve the problems existing in the above-mentioned prior art, thereby improving the test efficiency and having higher flexibility.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The utility model provides a dial indicator fixing device, comprising:

[0008] A fixed bracket, comprising an upper bracket and a lower bracket, wherein the upper bracket and the lower bracket are connected by a plurality of columns, and the lower bracket is provided with a fixing structure for fixing to the base of the test equipment;

[0009] A fixture assembly, the fixture assembly includes a vertical fixture and a horizontal fixture, the vertical fixture is used for vertically detachably mounting a dial indicator, and the horizontal fixture is used for horizontally detachably mounting a dial indicator, any one of the vertical fixtures and any one of the horizontal fixtures are set on one of the columns, and can move up and down along the corresponding column and rotate around the corresponding column, so that the probes of the dial indicators on the vertical fixture and the horizontal fixture contact the test piece.

[0010] Preferably, the upper bracket and the lower bracket each include a first semicircular ring and a second semicircular ring, the first semicircular ring and the second semicircular ring are buckled to form a circular ring structure, and the upper bracket and the lower bracket are coaxially arranged.

[0011] Preferably, the open ends of the first semicircular ring and the second semicircular ring are clamped by a clamping structure and fixed by a second fixing screw.

[0012] Preferably, the clamping structure includes a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate overlap each other, and the first clamping plate and the second clamping plate are respectively provided with threaded holes for allowing the second fixing screw to pass through; wherein, the first clamping plate and the second clamping plate are respectively arranged on the first semicircular ring and the second semicircular ring.

[0013] Preferably, there are four columns evenly distributed along the circumference of the circular structure, and two of the oppositely arranged columns are each provided with a vertical clamp, and the other two oppositely arranged columns are each provided with a horizontal clamp, the two vertical clamps are symmetrically arranged, and the two horizontal clamps are symmetrically arranged.

[0014] Preferably, the vertical clamp and the horizontal clamp both include a clamp body, a first circular hole is provided at one end of the clamp body for being mounted on the corresponding column, a first opening is provided on the first circular hole, a first wing plate is provided on both sides of the first opening, and the two first wing plates are connected by a third fixing screw to fix the clamp body on the corresponding column.

[0015] Preferably, a second circular hole is provided at the other end of the clamp body, the second circular hole is used for allowing the measuring rod of the dial indicator to pass through, a second opening is provided on the second circular hole, a second wing plate is provided on both sides of the second opening, and the two second wing plates are connected by a fourth fixing screw to achieve the detachability of the dial indicator;

[0016] Wherein, the second circular hole on the vertical clamp is vertically arranged, and the second circular hole on the horizontal clamp is horizontally arranged.

[0017] Preferably, the fixing structure includes a screw fixing seat and a first fixing screw, the screw fixing seat is arranged at the top of the lower bracket, and a threaded hole is provided on the screw fixing seat along the radial direction of the lower bracket, the first fixing screw is threadedly connected to the threaded hole, and the first fixing screw passes through the screw fixing seat and abuts against the side of the base of the test equipment.

[0018] Preferably, there are three groups of the fixing structures evenly distributed along the circumference of the lower bracket.

[0019] The utility model also provides a testing assembly, comprising a dial indicator and the dial indicator fixing device as described above.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The micrometer in this utility model can be mounted on a column via a vertical fixture and a horizontal fixture. The vertical fixture and the horizontal fixture can move up and down along the corresponding column and rotate around the corresponding column to adjust the height and angle. This allows the height and angle of the micrometer to be adjusted, allowing measurements to be taken at different measurement points in the axial and radial directions of the test piece. Furthermore, this saves space and is not limited by the instrument model, providing greater flexibility. Furthermore, the micrometer can be detachably mounted on the vertical fixture or the horizontal fixture, making it easy to disassemble and install. This utility model greatly improves the efficiency of micrometer test methods and reduces interference factors, and has broad application prospects in engineering rock and concrete testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0023] Figure 1 This is a schematic diagram of the installation of the test assembly in the embodiment of the present utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of a dial indicator fixing device in an embodiment of the present utility model;

[0025] Figure 3 This is a top view of the dial indicator fixing device in the embodiment of the present utility model;

[0026] Figure 4 This is a front view of a dial indicator fixing device in an embodiment of the present utility model;

[0027] Figure 5 It is a three-dimensional schematic diagram of the fixing bracket in the embodiment of the present utility model;

[0028] Figure 6 It is a three-dimensional schematic diagram of the vertical clamp and the horizontal clamp in the embodiment of the present utility model;

[0029] Figure 7 It is a three-dimensional schematic diagram of the first fixing screw, the second fixing screw, the third fixing screw and the fourth fixing screw in the embodiment of the present utility model.

[0030] Explanation of the reference numerals: 1-test piece; 2-test equipment base; 3-micrometer; 101-first semicircular ring; 102-second semicircular ring; 103-column; 104-screw fixing seat; 201-vertical clamp; 202-horizontal clamp; 203-first circular hole; 204-second circular hole; 301-first fixing screw; 302-second fixing screw; 303-third fixing screw; 304-fourth fixing screw. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The purpose of the utility model is to provide a dial indicator fixing device and a test assembly to solve the problems existing in the above-mentioned prior art, thereby improving the test efficiency and having higher flexibility.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] Example 1

[0035] like Figure 1-Figure 7 As shown, this embodiment provides a dial indicator fixing device, which mainly includes a fixing bracket and a clamp assembly, wherein the fixing bracket includes an upper bracket and a lower bracket, the upper bracket and the lower bracket are connected by multiple columns 103, and the lower bracket is provided with a fixing structure for fixing to the test equipment base 2; the clamp assembly includes a vertical clamp 201 and a horizontal clamp 202, the vertical clamp 201 is used for vertically detachably mounting the dial indicator 3, and the horizontal clamp 202 is used for horizontally detachably mounting the dial indicator 3, any one of the vertical clamps 201 and any one of the horizontal clamps 202 is set on one of the columns 103, and can move up and down along the corresponding column 103 and rotate around the corresponding column 103 to adjust the height and angle of the dial indicator 3 on the vertical clamp 201 and the horizontal clamp 202, so that its probe is in close contact with the to-be-tested piece 1 on the test equipment base 2, so as to facilitate measurement; wherein, the to-be-tested piece 1 is an engineering rock mass or a concrete specimen.

[0036] In this embodiment, the dial gauge 3 can be mounted on the column 103 via a vertical fixture 201 and a horizontal fixture 202. The vertical fixture 201 and the horizontal fixture 202 can move up and down along the corresponding column 103 and rotate around the corresponding column 103 to adjust the height and angle, thereby adjusting the height and angle of the dial gauge 3 to measure different measuring points. Moreover, it can save space, is not limited by the model of the instrument, and has better flexibility. Furthermore, the dial gauge 3 can be detachably mounted on the vertical fixture 201 or the horizontal fixture 202, making it easy to disassemble and install. This embodiment greatly improves the efficiency of the dial gauge method test and reduces interference factors, and has broad application prospects in engineering rock and concrete testing.

[0037] In this embodiment, the upper bracket and the lower bracket both include a first semicircular ring 101 and a second semicircular ring 102, the first semicircular ring 101 and the second semicircular ring 102 are buckled together to form a circular ring structure, and the circular ring structure formed by the upper bracket and the lower bracket is coaxially arranged, and the two first semicircular rings 101 and the two second semicircular rings 102 are symmetrically arranged up and down.

[0038] In this embodiment, the open ends of the first semicircular ring 101 and the second semicircular ring 102 are clamped by a clamping structure and fixed by a second fixing screw 302; specifically, the clamping structure may include a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate overlap each other, and the first clamping plate and the second clamping plate are respectively provided with threaded holes for allowing the second fixing screw 302 to pass through to fix the first clamping plate and the second clamping plate; wherein, the first clamping plate and the second clamping plate are respectively arranged on the first semicircular ring 101 and the second semicircular ring 102.

[0039] Alternatively, other clamping structures can be selected according to work needs. For example, the clamping structure can also be a limiting groove and a limiting block. The limiting groove and the limiting block are respectively arranged at the open ends of the first semicircular ring 101 and the second semicircular ring 102, and the clamping is achieved by inserting the limiting block into the corresponding limiting groove; and the limiting groove and the limiting block are both provided with threaded holes, and fixation is achieved by screwing the second fixing screw 302 into the threaded hole and tightening it.

[0040] In this embodiment, the column 103 is a circular column and can be welded and fixed to the upper bracket and the lower bracket; wherein, there are four columns 103 evenly distributed along the circumference of the circular ring structure, that is, two columns 103 are arranged between the two first semi-circular rings 101, and two columns 103 are arranged between the two second semi-circular rings 102; and two of the oppositely arranged columns 103 are each provided with a vertical clamp 201, and the other two oppositely arranged columns 103 are each provided with a horizontal clamp 202, the two vertical clamps 201 are symmetrically arranged, and the two horizontal clamps 202 are symmetrically arranged.

[0041] In this embodiment, the vertical clamp 201 and the horizontal clamp 202 both include a clamp body, one end of which is provided with a first circular hole 203 for being sleeved on the corresponding column 103, the first circular hole 203 is provided with a first opening, and both sides of the first opening are provided with a first wing plate, and the two first wing plates are connected by a third fixing screw 303 to fix the clamp body on the corresponding column 103; when the third fixing screw 303 is loosened, the vertical clamp 201 or the horizontal clamp 202 can be moved up and down along the corresponding column 103 and rotated around the corresponding column 103, so that the height and angle of the clamp can be adjusted arbitrarily, and the clamp can be fixed by tightening the third fixing screw 303 after selecting a suitable position.

[0042] In this embodiment, a second circular hole 204 is provided at the other end of the clamp body. The diameter of the second circular hole 204 is smaller than that of the first circular hole 203 and is used for the measuring rod of the micrometer 3 to pass through. A second opening is provided on the second circular hole 204. A second wing plate is provided on both sides of the second opening. The two second wing plates are connected by a fourth fixing screw 304 to achieve the detachable nature of the micrometer 3. Specifically, by loosening the fourth fixing screw 304, the micrometer 3 can be easily installed or removed, and by tightening the fourth fixing screw 304, the micrometer 3 can be fixed. The second circular hole 204 on the vertical clamp 201 is provided vertically to facilitate the vertical installation of the micrometer 3, and the second circular hole 204 on the horizontal clamp 202 is provided horizontally to facilitate the horizontal installation of the micrometer 3.

[0043] In this embodiment, the fixing structure mainly includes a screw fixing seat 104 and a first fixing screw 301. The screw fixing seat 104 is arranged on the top of the lower bracket, and a threaded hole is provided on the screw fixing seat 104 along the radial direction of the lower bracket. The first fixing screw 301 is threadedly connected to the threaded hole, and the screw head of the first fixing screw 301 passes through the screw fixing seat 104 and abuts against the side of the test equipment base 2 to achieve fixation.

[0044] In this embodiment, as a preferred implementation, three groups of the fixing structures are evenly distributed along the circumference of the lower bracket, i.e., the line connecting any two groups of the fixing structures and the center of the lower bracket forms a 120° angle. These three groups of fixing structures can firmly secure the fixed bracket to the test equipment base 2. It should be further noted that the fixing structures are not limited to three groups, and four, five, etc. groups can also be provided as needed.

[0045] This embodiment also provides a test assembly, including a dial indicator 3 and the dial indicator fixing device as described above.

[0046] The working method of this embodiment is as follows:

[0047] (1) Preparation: Adjust the test equipment base 2 and place the rock or concrete specimen.

[0048] (2) Install the fixing bracket: The two first semicircular rings 101 and the two second semicircular rings 102 are respectively inserted into the test piece 1 and the test equipment base 2 from both sides, and the second fixing screws 302 are tightened to fix the corresponding first semicircular rings 101 and the second semicircular rings 102.

[0049] (3) Fix the entire fixing bracket: adjust the first fixing screw 301 so that the screw head presses against the test equipment base 2, and try to make the center of the lower bracket coincide with the center of the test equipment base 2.

[0050] (4) Installing the micrometer 3: Select the micrometer 3 according to the actual situation, insert the measuring rod of the micrometer 3 into the second circular hole 204 of the corresponding vertical clamp 201 or horizontal clamp 202, tighten the fourth fixing screw 304, and connect the data acquisition cable of the micrometer 3 to the computer.

[0051] (5) Adjust the fixture: Rotate and move the vertical fixture 201 and the horizontal fixture 202 up and down to the selected measuring point, ensuring that the two vertically set micrometers 3 and the two horizontally set micrometers 3 are symmetrically located in the diameter direction of the test piece 1, and at the same time ensure that the probe of each micrometer 3 is in close contact with the test piece 1 and has a certain reading; fix the fixture position by adjusting the third fixing screw 303.

[0052] (6) Test start: The uniaxial press is continuously pressurized and data is collected on the computer according to the test requirements.

[0053] (7) Destruction load: Before destroying the test piece 1, loosen the second fixing screw 302 and remove the dial gauge fixing device as a whole. After completion, perform a destructive test on the test piece 1.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A dial indicator fixing device, characterized in that: include: A fixed bracket, comprising an upper bracket and a lower bracket, wherein the upper bracket and the lower bracket are connected by a plurality of columns, and the lower bracket is provided with a fixing structure for fixing to the base of the test equipment; A fixture assembly, the fixture assembly includes a vertical fixture and a horizontal fixture, the vertical fixture is used for vertically and detachably mounting a dial indicator, and the horizontal fixture is used for horizontally and detachably mounting a dial indicator, any one of the vertical fixtures and any one of the horizontal fixtures are set on one of the columns, and can move up and down along the corresponding column and rotate around the corresponding column, so that the probes of the dial indicators on the vertical fixture and the horizontal fixture contact the test piece.

2. The dial indicator fixing device according to claim 1, characterized in that: The upper bracket and the lower bracket each include a first semicircular ring and a second semicircular ring, the first semicircular ring and the second semicircular ring are buckled to form a circular ring structure, and the upper bracket and the lower bracket are coaxially arranged.

3. The dial indicator fixing device according to claim 2, characterized in that: The open ends of the first semicircular ring and the second semicircular ring are clamped together by a clamping structure and fixed by a second fixing screw.

4. The dial indicator fixing device according to claim 3, characterized in that: The clamping structure includes a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate overlap each other, and the first clamping plate and the second clamping plate are respectively provided with threaded holes for allowing the second fixing screw to pass through; wherein, the first clamping plate and the second clamping plate are respectively arranged on the first semicircular ring and the second semicircular ring.

5. The dial indicator fixing device according to claim 2, characterized in that: There are four columns evenly distributed along the circumference of the circular structure, and two of the oppositely arranged columns are each provided with a vertical clamp, and the other two oppositely arranged columns are each provided with a horizontal clamp. The two vertical clamps are symmetrically arranged, and the two horizontal clamps are symmetrically arranged.

6. The dial indicator fixing device according to claim 1 or 5, characterized in that: The vertical clamp and the horizontal clamp both include a clamp body, a first circular hole is provided at one end of the clamp body for being mounted on the corresponding column, a first opening is provided on the first circular hole, a first wing plate is provided on both sides of the first opening, and the two first wing plates are connected by a third fixing screw to fix the clamp body on the corresponding column.

7. The dial indicator fixing device according to claim 6, characterized in that: A second circular hole is provided at the other end of the clamp body, and the second circular hole is used for passing the measuring rod of the dial indicator. A second opening is provided on the second circular hole, and a second wing plate is provided on both sides of the second opening. The two second wing plates are connected by a fourth fixing screw to achieve the detachability of the dial indicator. Wherein, the second circular hole on the vertical clamp is vertically arranged, and the second circular hole on the horizontal clamp is horizontally arranged.

8. The dial indicator fixing device according to claim 2, characterized in that: The fixing structure includes a screw fixing seat and a first fixing screw. The screw fixing seat is arranged on the top of the lower bracket, and a threaded hole is provided on the screw fixing seat along the radial direction of the lower bracket. The first fixing screw is threadedly connected to the threaded hole, and the first fixing screw passes through the screw fixing seat and abuts against the side of the base of the test equipment.

9. The dial indicator fixing device according to claim 8, characterized in that: The fixing structures are evenly distributed in three groups along the circumference of the lower bracket.

10. A test assembly, characterized in that: The invention comprises a dial indicator and a dial indicator fixing device according to any one of claims 1 to 9.

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