Clamping device for pressure gauge calibration

Abstract

The utility model discloses a clamping device for pressure gauge calibration, and relates to the field of clamping for pressure gauge calibration, the clamping device comprises a workbench with a gas circuit inside, the top of the workbench is integrally provided with a bump, the interior of the bump is integrally provided with a pressure relief pipe penetrating to the outside of the bump, and the pressure relief pipe is provided with a gas circuit inside. A pressure relief valve is installed at the end, located outside the protruding block, of the pressure relief pipe, the pressure relief pipe is communicated with a gas circuit in the workbench, two butt joint pipes protruding upwards are integrally formed at the top of the protruding block, a reference meter is connected to one butt joint pipe in a threaded mode, and a test meter is connected to the other butt joint pipe in a sleeved mode. According to the utility model, through the arrangement of the clamp, the driving mechanism and the lifting mechanism, rapid connection and separation of the pressure gauges to be tested can be realized, so that the pressure gauges to be tested can be rapidly replaced under the condition that the number of the pressure gauges to be tested is large, and the calibration test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of clamping for pressure gauge calibration, in particular to a clamping device for pressure gauge calibration. Background Art

[0002] In order to avoid errors due to accuracy problems during the use of the pressure gauge, it is necessary to calibrate it regularly to determine whether the accuracy of the pressure gauge meets the requirements.

[0003] In the prior art, when calibrating a pressure gauge, it is necessary to introduce a gas of a certain pressure through the gas line. The pressurized gas acts on both the pressure gauge to be tested and the standard pressure gauge at the same time. Then, the pressure gauge to be tested is judged based on the readings on the standard pressure gauge and the pressure gauge to be tested to achieve the calibration purpose.

[0004] In the prior art, the pressure gauge to be tested and the docking pipe are generally installed through a threaded connection. For the detection of a single or a small number of pressure gauges, this connection method has little effect on the efficiency of the calibration test. However, when the number of pressure gauges to be tested is large, this method requires continuous connection and disassembly of different pressure gauges, thereby affecting the efficiency of the calibration test. Utility Model Content

[0005] The purpose of the present utility model is to provide a clamping device for calibrating a pressure gauge in order to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a clamping device for calibrating a pressure gauge, comprising a workbench with an internal air path, a convex block integrally formed on the top of the workbench, a pressure relief pipe integrally formed inside the convex block and extending to the outside of the convex block, a pressure relief valve being installed at one end of the pressure relief pipe located outside the convex block, the pressure relief pipe being connected to the air path inside the workbench, two upwardly protruding butt joints integrally formed on the top of the convex block, a reference gauge being threadedly connected to one of the butt joints, and a test gauge being sleeved on the other butt joint, and a sealing gasket being fixedly connected to the contact position between the top of the convex block and the input end of the test gauge;

[0007] A driving mechanism is installed at the bottom end of the workbench, and an output end of the driving mechanism is connected to a lifting mechanism extending above the workbench.

[0008] As a further solution of the present invention: the outer wall of the lifting mechanism is connected to a slider, one end of the slider is fixedly connected to a fixture with an open front end and a hollow structure inside, the test meter to be tested is placed in the inner cavity of the fixture, and a connecting groove is opened below the outer periphery of the fixture, and the connecting groove is used for the movement of the input pipe of the test meter.

[0009] As a further solution of the present invention: the driving mechanism includes a forward and reverse motor installed on the bottom end of the workbench through a bracket, the output end of the forward and reverse motor is fixedly connected to a driving gear, the outer periphery of the driving gear is engaged with a driven gear, and the diameter of the driving gear is smaller than the diameter of the driven gear.

[0010] As a further solution of the present invention: the lifting mechanism is connected to the screw for rotation of the workbench and the sliding rod is fixedly connected to the top of the workbench, a connecting shaft is fixedly installed on the top of the driven gear, the top of the connecting shaft is fixedly connected to the bottom end of the screw, and the connecting shaft is rotatably connected to the workbench through a bearing.

[0011] As a further solution of the present invention: the slider is threadedly connected to the screw rod, and the slider is connected to the slide rod in an up-and-down sliding manner.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. By setting up the fixture, drive mechanism and lifting mechanism, the pressure gauge to be tested can be quickly connected and separated, so that when there are a large number of pressure gauges to be tested, they can be replaced more quickly, thereby improving the efficiency of calibration testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model from a second perspective;

[0016] Figure 3 This is a schematic structural diagram of the third viewing angle of the present invention.

[0017] In the figure: 1. Workbench; 2. Bump; 3. Pressure relief pipe; 4. Pressure relief valve; 5. Butt joint; 6. Sealing gasket; 7. Clamp; 8. Connecting groove; 9. Test table; 10. Screw; 11. Slide rod; 12. Slider; 13. Reference table; 14. Forward and reverse motor; 15. Driving gear; 16. Driven gear. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figures 1 to 3 In an embodiment of the utility model, a clamping device for calibrating a pressure gauge includes a workbench 1 with an internal gas path, a protrusion 2 is integrally formed on the top of the workbench 1, a pressure relief pipe 3 is integrally formed inside the protrusion 2 and passes through the outside of the protrusion 2, the pressure relief pipe 3 is located outside the protrusion 2 and is equipped with a pressure relief valve 4 at one end, the pressure relief pipe 3 is connected to the gas path inside the workbench 1, and two upwardly protruding docking pipes 5 are integrally formed on the top of the protrusion 2, a reference gauge 13 is threadedly connected to one docking pipe 5, and a test gauge 9 is sleeved on the other docking pipe 5, and a sealing gasket 6 is fixedly connected to the contact position between the top of the protrusion 2 and the input end of the test gauge 9; a driving mechanism is installed at the bottom end of the workbench 1, and the output end of the driving mechanism is connected to a lifting mechanism extending above the workbench 1;

[0020] The outer wall of the lifting mechanism is connected to a slider 12, and one end of the slider 12 is fixedly connected to a fixture 7 with an open front end and a hollow structure inside. The test meter 9 to be tested is placed in the inner cavity of the fixture 7, and a connecting groove 8 is provided below the outer periphery of the fixture 7. The connecting groove 8 is used for the movement of the input pipe of the test meter 9.

[0021] In this embodiment, the reference meter 13 is first threadedly connected to a butt joint 5 having a threaded outer wall to complete the installation of the reference meter 13. Then, the test meter 9 to be tested is installed in the fixture 7, and the width of the opening is equal to the outer diameter of the input pipe of the test meter 9. The inserted test meter 9 cannot be displaced. Then, the driving mechanism is started, and the running driving mechanism drives the lifting mechanism to operate, and the running lifting mechanism drives the slider 12 to move up and down.

[0022] The downward moving slider 12 drives the clamp 7 and the test meter 9 placed in its inner cavity to move downward synchronously until the input pipe of the test meter 9 is completely connected with the docking pipe 5 whose outer wall does not have connecting threads. At this time, the input pipe of the test meter 9 and the sealing gasket 6 are squeezed and sealed to avoid air leakage during the test.

[0023] Please refer to Figure 3 The driving mechanism includes a forward and reverse motor 14 installed at the bottom end of the workbench 1 through a bracket. The output end of the forward and reverse motor 14 is fixedly connected to a driving gear 15. The outer periphery of the driving gear 15 is meshed with a driven gear 16. The diameter of the driving gear 15 is smaller than the diameter of the driven gear 16.

[0024] In this embodiment: by starting the forward and reverse motor 14, the forward and reverse motor 14 drives the driving gear 15 to rotate, and the rotating driving gear 15 drives the driven gear 16 to rotate. Since the diameter of the driving gear 15 is smaller than the diameter of the driven gear 16, the transmission process is a reduction transmission, avoiding excessive extrusion caused by excessive speed.

[0025] Please refer to Figure 1 and Figure 2 The lifting mechanism is connected to the workbench 1 by a screw 10 that is rotatably connected, and the slide rod 11 is fixedly connected to the top of the workbench 1. A connecting shaft is fixedly installed on the top of the driven gear 16. The top of the connecting shaft is fixedly connected to the bottom end of the screw 10, and the connecting shaft is rotatably connected to the workbench 1 through a bearing.

[0026] In this embodiment: the rotating driven gear 16 drives the screw 10 to rotate through the connecting shaft. At this time, the slider 12 moves upward or downward under the action of its internal thread and the guidance of the slide rod 11. The upward movement drives the test meter 9 to separate from the docking tube 5, and the downward movement drives the test meter 9 to dock with the docking tube 5.

[0027] Please refer to Figure 2 The slider 12 is threadedly connected to the screw rod 10, and the slider 12 is connected to the slide rod 11 in an up and down sliding manner.

[0028] In this embodiment, when the screw rod 10 rotates, the slider 12 is restricted by the slide bar 11 and cannot rotate. At this time, the slider 12 can only move up and down.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A clamping device for calibrating a pressure gauge, comprising a workbench (1) with an internal gas path, wherein a protrusion (2) is integrally formed on the top of the workbench (1), characterized in that: The inside of the protrusion (2) is integrally formed with a pressure relief pipe (3) that extends to the outside of the protrusion (2); a pressure relief valve (4) is installed at one end of the pressure relief pipe (3) located outside the protrusion (2); the pressure relief pipe (3) is connected to the air path inside the workbench (1); the top of the protrusion (2) is integrally formed with two upwardly protruding butt joints (5); a reference meter (13) is threadedly connected to one of the butt joints (5); a test meter (9) is sleeved on the other butt joint (5); and a sealing gasket (6) is fixedly connected to the contact position between the top of the protrusion (2) and the input end of the test meter (9); A driving mechanism is installed at the bottom end of the workbench (1), and an output end of the driving mechanism is connected to a lifting mechanism extending above the workbench (1).

2. A pressure gauge calibration clamping device according to claim 1, characterized in that: The outer wall of the lifting mechanism is connected to a slider (12), one end of the slider (12) is fixedly connected to a fixture (7) with an open front end and a hollow interior, the test meter (9) to be tested is placed in the inner cavity of the fixture (7), and a connecting groove (8) is provided below the outer periphery of the fixture (7), and the connecting groove (8) is used for moving the input pipe of the test meter (9).

3. A clamping device for pressure gauge calibration according to claim 2, characterized in that: The driving mechanism comprises a forward and reverse motor (14) mounted on the bottom end of the workbench (1) via a bracket, an output end of the forward and reverse motor (14) being fixedly connected to a driving gear (15), an outer periphery of the driving gear (15) being meshed with a driven gear (16), and a diameter of the driving gear (15) being smaller than a diameter of the driven gear (16).

4. A clamping device for pressure gauge calibration according to claim 3, characterized in that: The lifting mechanism comprises a screw rod (10) rotatably connected to the workbench (1) and a slide rod (11) fixedly connected to the top of the workbench (1); a connecting shaft is fixedly installed on the top of the driven gear (16); the top of the connecting shaft is fixedly connected to the bottom end of the screw rod (10), and the connecting shaft is rotatably connected to the workbench (1) via a bearing.

5. A clamping device for pressure gauge calibration according to claim 4, characterized in that: The slider (12) is threadedly connected to the screw rod (10), and the slider (12) is connected to the slide rod (11) in an up-and-down sliding manner.

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