Flange connecting device and safety valve checking device

Abstract

The utility model belongs to the technical field of safety valve checking devices, and particularly relates to a flange connecting device and a safety valve checking device, which comprise a first flange plate, a plurality of adjusting bolts are rotatably connected to one side of the first flange plate, and a plurality of cross rods are circumferentially arranged on the outer side of the first flange plate. First vertical plates and second vertical plates located on the two sides of the first flange plate are fixedly arranged at the two ends of the transverse rod correspondingly, and adjusting bolts penetrate through the corresponding first vertical plates in a threaded mode correspondingly; and a mounting hole penetrates through the second vertical plate, a pressing sliding block is arranged in the mounting hole in a sliding mode, a second flange plate is arranged between the pressing sliding block and the first flange plate, and a limiting piece is arranged on one side of the second vertical plate and used for fixing the pressing sliding block. According to the utility model, under the condition that the flange of the verification device is not replaced, the flange can be firmly and effectively connected with flanges of various sizes and specifications, so that an air tap connected with the flange does not need to be disassembled, and the accuracy of verification work is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety valve calibration devices, and in particular relates to a flange connection device and a safety valve calibration device. Background Art

[0002] At present, when the safety valve inspection device is used to inspect multiple safety valves, it is usually necessary to install and disassemble each safety valve for inspection. During installation, it is necessary to ensure that the flange of the inspection device is tightly connected to the flange of the safety valve. It usually takes about two minutes to inspect a safety valve. Due to the different specifications of safety valves and different sizes of flanges, the inspection device needs to be equipped with flanges of various sizes. The operation is labor-intensive, time-consuming and expensive. In addition, when replacing the flange of the inspection device, the air nozzle connected to the flange needs to be frequently disassembled, resulting in air leakage in the joint, which affects the judgment of the inspection personnel. Summary of the invention

[0003] The utility model aims to solve the problem that when an existing safety valve calibration device is used to calibrate multiple safety valves, the calibration device needs to be equipped with flanges of various sizes due to the different specifications of the safety valves, and the gas nozzles connected to the flanges need to be frequently disassembled, resulting in joint leakage and affecting the judgment of the calibration personnel. A flange connection device and a safety valve calibration device are provided, which can achieve effective and tight connection between the flange and flanges of various sizes without replacing the flange of the calibration device, and further, there is no need to disassemble the gas nozzles connected to the flanges, thereby ensuring the accuracy of the calibration work.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A flange connection device includes a first flange plate, a plurality of adjustment bolts are circumferentially arranged on one side of the first flange plate, the adjustment bolts are rotatably connected to the first flange plate, a plurality of cross bars are circumferentially arranged on the outer side of the first flange plate, a first vertical plate and a second vertical plate are fixedly arranged at both ends of the cross bars, the first vertical plate and the second vertical plate are respectively arranged on both sides of the first flange plate, the adjustment bolts are respectively threaded through the corresponding first vertical plates, and the adjustment bolts are rotated to drive the first vertical plate to move, thereby driving the second vertical plate to move.

[0006] The second vertical plate has a mounting hole radially extending through it along the first flange, a strip block is fixedly provided on the side wall of the mounting hole away from the first flange, a clamping slider is slidably provided in the mounting hole, a strip groove is provided on one side of the clamping slider, the strip groove matches the strip block, a second flange is provided between the clamping slider and the first flange, a limiting piece is provided on one side of the second vertical plate for fixing the clamping slider, and the second vertical plate drives the clamping slider to move, thereby fixing the second flange and the first flange.

[0007] Preferably, the mounting hole passes through a side of the second vertical plate close to the first flange, so as to ensure that the pressing slide block can contact and press against the second flange in case of second flanges of different sizes.

[0008] Preferably, the end of the adjusting bolt is fixedly connected to a circular plate, and a plurality of connecting grooves matching the corresponding circular plates and the ends of the adjusting bolts are opened on the side of the first flange, and the adjusting bolts and the first flange are rotatably connected through the cooperation between the circular plate and the connecting grooves.

[0009] Preferably, the adjusting bolts are all threadedly connected with nuts, and the nuts are located between the first vertical plate and the first flange, so that the limiting and fixing effects of the first vertical plate are further ensured by the nuts.

[0010] Preferably, the limiting member comprises a fixing bolt, the end of which passes through one side of the second vertical plate and extends into the mounting hole. The fixing bolt is rotated to deposit the pressing slider, thereby ensuring the fixation of the pressing slider.

[0011] A safety valve inspection device comprises the above-mentioned flange connection device, wherein the first flange is the flange of the safety valve inspection device, and the second flange is the flange of the safety valve to be inspected.

[0012] Through the above technical solution, the beneficial effects of the utility model are:

[0013] 1. The utility model realizes the top fixing of the first flange and the second flange by relatively installing the first flange plate and the second flange of different sizes, and rotating the adjusting bolt to move the clamping slider toward the first flange, thereby eliminating the need to set corresponding bolt through holes on the flange, which can only realize the connection and fixation between flanges of the same specification.

[0014] 2. The utility model only needs to connect the air nozzle of the safety valve verification device to the first flange, and fasten the first flange with the second flange (i.e., the safety valve flange) of different specifications and sizes. Without replacing the first flange, safety valves of different specifications can be verified, and there is no need to disassemble the air nozzle connected to the first flange.

[0015] 3. The utility model realizes the sliding guidance and limiting of the pressing slider in the installation hole by cooperating with the strip block and the strip groove, thereby preventing the pressing slider from being separated from the second vertical plate.

[0016] 4. The utility model realizes the pressing and fixing of the pressing slide block to the second flange plates of different sizes by sliding the pressing slide block in the mounting hole, and at the same time realizes the fixing of the pressing slide block by rotating the fixing bolt to ensure the tightness of the flange connection.

[0017] 5. The utility model limits the movement of the first vertical plate on the adjusting bolt by means of a nut, thereby effectively avoiding the tightening effect of the connection when the first flange and the second flange are fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0019] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0020] Figure 3 The structure of the utility model is shown in FIG. Figure 3 .

[0021] Figure 4 It is a structural schematic diagram of the second vertical plate of the utility model.

[0022] The numbers in the accompanying drawings are: 1 is the first flange, 2 is the adjusting bolt, 3 is the cross bar, 4 is the first vertical plate, 5 is the second vertical plate, 6 is the mounting hole, 7 is the strip block, 8 is the clamping slider, 9 is the strip groove, 10 is the second flange, 11 is the round plate, 12 is the nut, and 13 is the fixing bolt. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0024] like Figure 1 to Figure 4 As shown, this embodiment provides a flange connection device, including a first flange 1, which is a blind hole flange and is connected to a gas nozzle of a calibration device (or welded to a gas rope joint for air intake pressure test), and is used to connect the safety valve flange to calibrate the safety valve. A plurality of adjusting bolts 2 are circumferentially arranged on one side of the first flange 1, and the adjusting bolts 2 are rotatably connected to the first flange 1. The ends of the adjusting bolts 2 are fixedly connected to a circular plate 11. A plurality of connecting grooves matching the corresponding circular plates 11 and the ends of the adjusting bolts 2 are opened on the side of the first flange 1. The circular plate 11 ensures that the adjusting bolts 2 are rotatably connected to the first flange 1 while preventing the adjusting bolts 2 from being separated from the first flange 1.

[0025] A plurality of cross bars 3 are circumferentially arranged on the outer side of the first flange 1, and a first vertical plate 4 and a second vertical plate 5 are fixedly arranged at both ends of the cross bar 3, respectively. The first vertical plate 4 and the second vertical plate 5 are respectively arranged on both sides of the first flange 1, and the adjusting bolts 2 are threadedly penetrated through the corresponding first vertical plates 4, and by rotating the adjusting bolts 2, the first vertical plates 4 are driven to move axially along the first flange 1, thereby driving the cross bar 3 and the second vertical plates 5 to move axially along the first flange 1, and nuts 12 are threadedly connected on the adjusting bolts 2, and the nuts 12 are located between the first vertical plates 4 and the first flange 1. When the second vertical plate 5 moves to the corresponding position, the nuts 12 are rotated to tighten the first vertical plates 4, thereby realizing the limitation of the first vertical plates 4, and ensuring the positioning and fixing effect of the first vertical plates 4 and the second vertical plates 5.

[0026] The second vertical plate 5 is penetrated with a mounting hole 6 along the radial direction of the first flange 1, and a strip block 7 is fixedly arranged on the side wall of the mounting hole 6 away from the first flange 1. A clamping slider 8 is slidably arranged in the mounting hole 6, and the clamping slider 8 can slide in the mounting hole 6 along the radial direction of the first flange 1. A strip groove 9 is opened on one side of the clamping slider 8, and the strip groove 9 matches the strip block 7. The strip block 7 and the strip groove 9 are slidably matched. The guiding and limiting of the clamping slider 8 are achieved by the cooperation between the strip block 7 and the strip groove 9 to prevent the clamping slider 8 from detaching from the second vertical plate 5. A second flange 10 is arranged between the clamping slider 8 and the first flange 1. The diameter of the second flange 10 is less than or equal to the first flange 1. The second flange 10 is a safety valve flange. The side of the second flange 10 close to the first flange 1 is made to correspond to the end face of the second flange 10 by sliding the clamping slider 8. The second vertical plate 5 is moved axially along the first flange 1 to deposit the clamping slider 8 toward the first flange 1 to the second flange 10, thereby achieving a fastening connection between the first flange 1 and the second flange 10, thereby ensuring the calibration effect of the safety valve. In addition, since the fastening connection of the two flanges is achieved by the sliding clamping slider 8, the specification size of the second flange 10 does not need to be limited by the first flange 1.

[0027] A limit piece is set on one side of the second vertical plate 5 for fixing the clamping slider 8. The limit piece includes a fixing bolt 13. The end of the fixing bolt 13 passes through one side of the second vertical plate 5 and extends into the mounting hole 6. After adjusting the position of the clamping slider 8 to correspond to the end surface of the second flange 10, the fixing bolt 13 is rotated so that the fixing bolt 13 is pressed and fixed to the clamping slider 8 in the mounting hole 6.

[0028] The mounting hole 6 passes through one side of the second vertical plate 5 close to the first flange 1, that is, the side of the clamping slider 8 close to the first flange 1 is flush with the side of the second vertical plate 5 close to the first flange 1, ensuring that when facing the second flange 10 of different diameters, the clamping slider 8 can clamp and fix it to avoid interference from the second vertical plate 5.

[0029] A safety valve inspection device comprises the above-mentioned flange connection device, wherein the first flange 1 is the flange of the safety valve inspection device, and the second flange 10 is the flange of the safety valve to be inspected.

[0030] When in use, the end face of the second flange 10 connected to the safety valve is pressed against the end face of the first flange 1, and then the clamping slider 8 is slid so that the end of the clamping slider 8 is opposite to the end face of the second flange 10, and then the fixing bolt 13 is turned to fix the clamping slider 8, and the adjusting bolt 2 is turned to make the first vertical plate 4 move axially along the first flange 1, thereby driving the second vertical plate 5 and the clamping slider 8 to move toward the second flange 10, and then the end of the clamping slider 8 is pressed against the second flange 10, so that the second flange 10 is closely fixed to the first flange 1, and the nut 12 is turned to make the end face of the nut 12 close to the first vertical plate 4 to further limit the first vertical plate 4, and the second flange 10 is pressed against the first flange 1 at the same time through multiple clamping sliders 8, so that the first flange 1 is installed and fixed, and then the safety valve can be checked.

[0031] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A flange connection device, characterized in that: The invention comprises a first flange (1), a plurality of adjusting bolts (2) are arranged circumferentially on one side of the first flange (1), the adjusting bolts (2) are rotatably connected to the first flange (1), a plurality of cross bars (3) are arranged circumferentially on the outer side of the first flange (1), a first vertical plate (4) and a second vertical plate (5) are respectively fixedly arranged at both ends of the cross bars (3), the first vertical plate (4) and the second vertical plate (5) are respectively arranged on both sides of the first flange (1), and the adjusting bolts (2) are respectively threadedly penetrated through the corresponding first vertical plates (4); The second vertical plate (5) is provided with a mounting hole (6) radially extending through the first flange (1); a strip block (7) is fixedly arranged on the side wall of the mounting hole (6) away from the first flange (1); a clamping slider (8) is slidably arranged in the mounting hole (6); a strip groove (9) is provided on one side of the clamping slider (8); the strip groove (9) matches the strip block (7); a second flange (10) is arranged between the clamping slider (8) and the first flange (1); and a stopper is provided on one side of the second vertical plate (5) for fixing the clamping slider (8).

2. A flange connection device according to claim 1, characterized in that: The mounting hole (6) passes through a side of the second vertical plate (5) close to the first flange (1).

3. A flange connection device according to claim 1, characterized in that: The end of the adjusting bolt (2) is fixedly connected to the circular plate (11), and the side surface of the first flange (1) is provided with a plurality of connecting grooves matching the corresponding circular plates (11) and the ends of the adjusting bolt (2).

4. A flange connection device according to claim 1, characterized in that: The adjusting bolts (2) are all threadedly connected with nuts (12), and the nuts (12) are located between the first vertical plate (4) and the first flange (1).

5. A flange connection device according to claim 1, characterized in that: The limiting member comprises a fixing bolt (13), the end of the fixing bolt (13) passing through one side of the second vertical plate (5) and extending into the mounting hole (6).

6. A safety valve inspection device, characterized in that: The flange connection device comprises the flange connection device according to any one of claims 1 to 5, wherein the first flange (1) is a flange of a safety valve testing device, and the second flange (10) is a flange of a safety valve to be tested.

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