Horizontal calibration test bench

Abstract

The utility model provides a horizontal calibration testbed, including calibration platform, stand column, cross brace, level ruler and fixed piece, calibration platform is the flat panel, stand column respectively vertical fixed connection is on the four corners of calibration platform, cross brace is transversally fixed connection between stand column, the both ends of cross brace stretch out stand column and is equipped with the connecting hole, the level ruler is equipped with two, and the fixed piece is equipped with the fixed piece. The fixing pieces are arranged on the two adjacent side edges of the calibration platform and fixedly installed on the bottom faces of the two adjacent side edges of the calibration platform, each fixing piece comprises an anchor rod pre-buried in the ground, a threaded cylinder and a first nut, the threaded cylinders are in threaded connection with the anchor rods, nuts are arranged at the bottom ends of the threaded cylinders, the threaded cylinders are arranged on the connecting holes in a penetrating mode, and the first nuts are in threaded connection with the threaded cylinders and press the transverse supports on the threaded cylinders. The test bench with a certain height is convenient for detection personnel to better work in a dry and rigid detection environment, meanwhile, the calibration workbench can observe and adjust the horizontal state of the calibration workbench at any time, and an optimal working environment is provided for the vibration device detection bench.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration workbenches, in particular to a horizontal calibration test bench. Background Art

[0002] According to industry standards, vibration and acoustic monitoring devices are generally required to be calibrated once every 12 months. According to the requirements of GBT20485.1-2008 Vibration and shock sensor calibration method Part 1: Basic concepts, "the sensor should be fixed with sufficient rigidity so that the vibration generator can transmit all the movement to the sensor within the sensor's operating frequency band." In order to meet the requirements, based on experience, the vibration device test table is generally installed on a cement table in the basement or on the first floor, and there is no strong earthquake source nearby.

[0003] There are two problems with the above method. First, the vibration device test bench is installed close to the ground, which is not convenient for testers to work for a long time (squatting to work is very strenuous); second, the degree of inclination of the ground is unknown, making it difficult to provide a level, dry and rigid testing environment for the vibration device test bench. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a horizontal calibration test bench. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The horizontal calibration test bench comprises a calibration platform, columns, cross braces, a level and fixings. The calibration platform is a flat panel. The columns are respectively fixedly connected vertically to the four corners of the calibration platform. The cross braces are fixedly connected laterally between the columns. Both ends of the cross braces extend out of the columns and are provided with connecting holes. Two level rulers are provided and are fixedly mounted on the bottom surface of two adjacent sides of the calibration platform. The fixings comprise an anchor rod pre-buried in the ground, a threaded barrel and a first nut. The threaded barrel is threadedly connected to the anchor rod. A nut is provided at the bottom end of the threaded barrel. The threaded barrel is passed through the connecting hole. The first nut is threadedly connected to the threaded barrel and presses the cross brace onto the threaded barrel.

[0006] Furthermore, a second nut is threadedly connected to the anchor rod, and the second nut is located under the threaded barrel.

[0007] Furthermore, a plurality of washers are provided between the first nut and the cross brace and between the cross brace and the nut.

[0008] Furthermore, the connecting hole is a U-shaped hole, and the opening direction is toward the end of the cross brace.

[0009] Furthermore, four levels are provided and are respectively located at four sides of the calibration platform.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] After the connecting hole of the cross brace is sleeved on the threaded barrel, the height of the threaded barrel on the anchor rod is adjusted by rotating the threaded barrel on the anchor rod, and then the height of each point of the end of the cross brace is adjusted, so that the bubbles of each level ruler are centered to make the calibration platform level, providing a better horizontal reference surface. The test bench with a certain height is convenient for the inspection personnel to better carry out their work in a dry and rigid inspection environment. At the same time, the calibration workbench can observe and adjust its horizontal state at any time, providing an optimal working environment for the vibration device inspection bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0014] Figure 2 It is a left-side structural schematic diagram of an embodiment of the utility model.

[0015] In the above drawings: calibration platform 1, column 2, cross brace 3, level ruler 4, connecting hole 5, anchor rod 6, threaded tube 7, nut 8, first nut 9, second nut 10, washer 11. DETAILED DESCRIPTION

[0016] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Embodiment 1:

[0018] like Figure 1~Figure 2 As shown, the utility model provides a technical solution, a horizontal calibration test bench, comprising a steel calibration platform 1, a square steel column 2, a square steel cross brace 3, a level ruler 4 and a fixing part, wherein the calibration platform 1 is a flat panel, the columns 2 are respectively vertically fixedly connected to the four corners of the calibration platform 1, the cross brace 3 is laterally fixedly connected between the columns 2, the two ends of the cross brace 3 extend out of the columns 2 and are provided with connecting holes 5, two of the level rulers 4 are provided and fixedly mounted on the bottom surface of two adjacent sides of the calibration platform 1, i.e., the X-axis direction and the Y-axis direction on the horizontal plane, the fixing part comprises an anchor rod 6 pre-buried in the ground, a threaded barrel 7 and a first nut 9, the threaded barrel 7 is threadedly connected to the anchor rod 6, a nut 8 is provided at the bottom end of the threaded barrel 7, the threaded barrel 7 is penetrated through the connecting hole 5, the first nut 9 is threadedly connected to the threaded barrel 7 and presses the cross brace 3 onto the threaded barrel 7.

[0019] It should be noted that the diameter of the connecting hole 5 is slightly larger than the outer diameter of the threaded tube 7 so as to reserve enough adjustment space for adjusting the cross brace 3 .

[0020] Using square steel structure as material, design a calibration workbench with a height of about 50cm and length*width=40cm*30cm.

[0021] The working principle is: straighten the pre-installed anchor rod 6, thread the threaded tube 7 on the anchor rod 6, make the threaded tube 7 approximately at the same height, make the connecting hole 5 of the cross brace 3 correspond to the corresponding anchor rod 6, and place the cross brace 3 connected to the calibration platform 1 on the threaded tube 7. Since the connecting hole 5 is slightly larger than the threaded tube 7, the height of each threaded tube 7 is adjusted by observing the horizontal ruler 4 in two directions on the calibration platform 1 to keep the calibration platform 1 level, and then use the first nut 9 to fasten the cross brace 3 to the threaded tube 7. It does not need to be 100% screwed on here.

[0022] In this embodiment, if Figure 1 , Figure 2 As shown, the anchor rod 6 is threadedly connected with a second nut 10, and the second nut 10 is located under the threaded barrel 7. After leveling, the second nut 10 is tightened toward the threaded barrel 7 to support the threaded barrel 7 so as to further reinforce the threaded barrel 7.

[0023] In this embodiment, if Figure 1 , Figure 2 As shown, a plurality of washers 11 are provided between the first nut and the cross brace 3 and between the cross brace 3 and the nut 8. The washers 11 can be steel rings or copper rings to further fix the cross brace 3.

[0024] Embodiment 2:

[0025] On the basis of this embodiment 1, as shown in 2, the connecting hole 5 is a U-shaped hole, and the opening direction is toward the end of the cross brace 3. The connecting hole 5 is opened to facilitate the placement of the cross brace 3 and provide more adjustment space for adjusting the position of the cross brace 3, which is convenient for installation.

[0026] Embodiment 3:

[0027] On the basis of Example 1, Figure 1 , Figure 2 As shown, four level rulers 4 are provided and are respectively located at four sides of the calibration platform 1. This allows the installer to observe the level rulers 4 when adjusting the height of the threaded barrel 7 at different positions, thus facilitating the adjustment operation.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Horizontal calibration test bench, characterized by: It includes a steel calibration platform, square steel columns, square steel cross braces, a spirit level and fixings. The calibration platform is a flat panel. The columns are vertically fixedly connected to the four corners of the calibration platform respectively. The cross braces are laterally fixedly connected between the columns. Both ends of the cross braces extend out of the columns and are provided with connecting holes. Two spirit levels are provided and are fixedly installed on the bottom surface of two adjacent sides of the calibration platform. The fixings include an anchor rod pre-buried in the ground, a threaded barrel and a first nut. The threaded barrel is threadedly connected to the anchor rod. A nut is provided at the bottom end of the threaded barrel. The threaded barrel is passed through the connecting hole. The first nut is threadedly connected to the threaded barrel and presses the cross brace onto the threaded barrel.

2. The horizontal calibration test bench according to claim 1, characterized in that: A second nut is threadedly connected to the anchor rod, and the second nut is located under the threaded barrel.

3. The horizontal calibration test bench according to claim 1, characterized in that: A plurality of washers are provided between the first nut and the cross brace and between the cross brace and the nut.

4. The horizontal calibration test bench according to claim 1, characterized in that: The connecting hole is a U-shaped hole, and the opening direction is toward the end of the cross brace.

5. The horizontal calibration test bench according to claim 1, characterized in that: There are four level rulers, which are respectively located at four sides of the calibration platform.

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