Clamping device for lap joint flange

Abstract

The utility model provides a clamping device for a lap joint flange. The clamping device comprises a connecting pipe and a flange plate. The flange plate sleeves one side of the outer surface of the connecting pipe, threaded holes are formed in the periphery of the surface of the flange plate, and threaded rods are in threaded engagement with the interiors of the threaded holes. According to the clamping device for the lap joint flange, the two spliced connecting pipes are spliced together through the threaded rod, the threaded rod is meshed with threaded holes of the two flange plates in a threaded mode, then the clamping plate is arranged on the surfaces of the flange plates in a sleeved mode, the restoring elastic force of the spring pushes the moving block, and the moving block drives the limiting block to be embedded into the limiting groove. The device is simple in structure and high in practicability, an operator can limit the connecting block and clamp the threaded rod, so that the two flange plates are clamped when assembled together, the flange plates and the connecting pipe are prevented from loosening after being assembled, and the service life of the flange plates is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of slip-on flange installation, in particular to a clamping device for a slip-on flange. Background Art

[0002] Flange, also known as flange flange or flange, is a part that connects shafts to each other and is used to connect pipe ends. It is also used as a flange on the inlet and outlet of equipment to connect two devices, such as reducer flange. Flange connection or flange joint refers to a detachable connection composed of flange, gasket and bolts as a combined sealing structure. Pipe flange refers to the flange used for piping in pipeline installations, and when used on equipment, it refers to the inlet and outlet flanges of the equipment.

[0003] A slip-on flange is a type of flange that fits loosely on the flange of a container or pipe. A flange is a part that connects shafts to each other and is used to connect pipe ends. There are also flanges used on equipment inlets and outlets to connect two devices. A slip-on flange is a loose flange. The flange can be made by flanging, direct turning, or welding a ring. When installing a slip-on flange, it is directly placed on the outer surface of the connecting pipe. After aligning the two connecting pipes with slip-on flanges, align the slip-on flanges on the surfaces of the two connecting pipes and clamp them with bolts. However, fluids are usually transported inside the pipeline, and the impact of the fluid on the pipeline will cause vibration, which will affect the stability of the bolt installation. There is looseness between the flanges, and the effect of clamping with bolts alone is poor.

[0004] Therefore, it is necessary to provide a clamping device for a slip-on flange to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model provides a clamping device for a slip-on flange, which solves the problem that the slip-on flange is directly sleeved on the outer surface of a connecting pipe during installation. After two connecting pipes with the slip-on flanges are aligned, the slip-on flanges on the surfaces of the two connecting pipes are aligned and clamped by bolts. However, fluid is usually transported inside the pipeline, and the impact of the fluid on the pipeline will generate vibration, thereby affecting the stability of the bolt installation, and there is looseness between the flanges, so the effect of clamping only by bolts is poor.

[0006] In order to solve the above technical problems, the utility model provides a clamping device for a slip-on flange, comprising: a connecting pipe and a flange;

[0007] The flange is sleeved on one side of the outer surface of the connecting pipe, threaded holes are provided around the surface of the flange, a threaded rod is threadedly engaged with the inner thread of the threaded hole, a connecting block is fixedly connected to one end of the threaded rod, a nut is threadedly engaged with one side of the outer surface of the threaded rod, and limiting grooves are provided on the six sides of the outer surface of the connecting block;

[0008] A clamping plate, which is sleeved on the other side of the outer surface of the connecting pipe, and comprises a mounting ring block, a moving groove, a connecting groove, a sliding rod and a spring;

[0009] The limiting device is slidably installed inside the moving groove, and the limiting device includes a moving block, a sliding hole, a limiting block and an extrusion groove.

[0010] Preferably, the mounting ring block is sleeved on the surface of the connecting pipe, the two movable grooves are respectively opened on both sides of the mounting ring block surface, the two connecting grooves are respectively opened on the other two sides of the outer surface of the mounting ring block, the sliding rod is fixedly installed inside the movable groove, and the spring is sleeved on one side of the outer surface of the sliding rod.

[0011] Preferably, the moving block is sleeved on the other side of the outer surface of the sliding rod, the sliding hole is opened on one side of the outer surface of the moving block, the limit block is fixedly installed on the other side of the outer surface of the moving block, and the extrusion groove is opened on the surface of the limit block.

[0012] Preferably, one end of the spring is fixedly connected to the moving block, and the other end of the spring is fixedly connected to the inner cavity wall of the moving groove.

[0013] Preferably, the communicating groove is connected to the moving groove.

[0014] Preferably, a threaded layer is provided on the outer surface of the connecting pipe, and a connecting device is fixedly mounted on the surface of the mounting ring block.

[0015] Preferably, the connecting device comprises a fixed ring block and a threaded groove, the fixed ring block is fixedly mounted on the surface of the mounting ring block, and the threaded groove is opened in the middle of one side of the fixed ring block.

[0016] Compared with the related art, the clamping device for a slip-on flange provided by the utility model has the following advantages:

[0017] Beneficial effects:

[0018] The utility model provides a clamping device for a slip-on flange, which splices two spliced ​​connecting pipes together through a threaded rod, the threaded rod threads engage the threaded holes of the two flange plates, and then the clamping plate is sleeved on the surface of the flange plate, the restoring elastic force of the spring pushes the moving block, and the moving block drives the limit block to be embedded into the inside of the limit groove, so as to limit the threaded rod and prevent the threaded rod from loosening due to vibration. The device has a simple structure and strong practicality, and an operator can add a limit to the connecting block and clamp the threaded rod so that the two flange plates are clamped when assembled together, so as to avoid loosening of the flange plate and the connecting pipe after assembly, thereby extending the service life of the flange plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a first embodiment of a clamping device for a slip-on flange provided by the utility model;

[0020] Figure 2 for Figure 1 The schematic cross-sectional view of the flange shown;

[0021] Figure 3 for Figure 2 An enlarged schematic diagram of point A is shown;

[0022] Figure 4 for Figure 1 The schematic diagram of the clamping disc structure shown;

[0023] Figure 5 for Figure 4 The enlarged schematic diagram of point B is shown;

[0024] Figure 6 A schematic structural diagram of a second embodiment of a clamping device for a slip-on flange provided by the utility model;

[0025] Figure 7 for Figure 6 An enlarged schematic diagram of point C is shown.

[0026] Numbers in the figure: 1, connecting pipe, 2, flange, 3, threaded hole, 4, threaded rod, 5, connecting block, 6, nut, 7, clamping plate, 71, mounting ring block, 72, movable groove, 73, connecting groove, 74, sliding rod, 75, spring, 8, limiting device, 81, movable block, 82, sliding hole, 83, limiting block, 84, extrusion groove, 9, limiting groove, 10, threaded layer, 11, connecting device, 111, fixing ring block, 112, threaded groove. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0028] First embodiment

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic structural diagram of a first embodiment of a clamping device for a slip-on flange provided by the utility model; Figure 2 for Figure 1 The schematic cross-sectional view of the flange shown; Figure 3 for Figure 2 An enlarged schematic diagram of point A is shown; Figure 4 for Figure 1 The schematic diagram of the clamping disc structure shown; Figure 5 for Figure 4 The enlarged schematic diagram of point B is shown. A clamping device for a slip-on flange comprises: a connecting pipe 1 and a flange plate 2;

[0030] The flange 2 is sleeved on one side of the outer surface of the connecting pipe 1, and threaded holes 3 are provided on the four sides of the surface of the flange 2. A threaded rod 4 is engaged with the inner thread of the threaded hole 3, and a connecting block 5 is fixedly connected to one end of the threaded rod 4. A nut 6 is engaged with the outer surface of the threaded rod 4, and six sides of the outer surface of the connecting block 5 are provided with limiting grooves 9;

[0031] A clamping plate 7, wherein the clamping plate 7 is sleeved on the other side of the outer surface of the connecting pipe 1, and the clamping plate 7 comprises a mounting ring block 71, a moving groove 72, a connecting groove 73, a sliding rod 74 and a spring 75;

[0032] The limiting device 8 is slidably installed inside the moving groove 72 , and the limiting device 8 includes a moving block 81 , a sliding hole 82 , a limiting block 83 and an extrusion groove 84 .

[0033] The mounting ring block 71 is sleeved on the surface of the connecting pipe 1, the two movable grooves 72 are respectively opened on both sides of the surface of the mounting ring block 71, the two connecting grooves 73 are respectively opened on the other two sides of the outer surface of the mounting ring block 71, the sliding rod 74 is fixedly installed inside the movable groove 72, and the spring 75 is sleeved on one side of the outer surface of the sliding rod 74.

[0034] The moving block 81 is sleeved on the other side of the outer surface of the sliding rod 74, the sliding hole 82 is opened on one side of the outer surface of the moving block 81, the limit block 83 is fixedly installed on the other side of the outer surface of the moving block 81, and the extrusion groove 84 is opened on the surface of the limit block 83.

[0035] One end of the spring 75 is fixedly connected to the moving block 81 , and the other end of the spring 75 is fixedly connected to the inner cavity wall of the moving groove 72 .

[0036] The communicating groove 73 is communicated with the moving groove 72 .

[0037] The extrusion groove 84 is inclined. When the limiting block 83 moves toward the connecting block 5 , the extrusion groove 84 is squeezed into the inside of the communicating groove 73 by the connecting block 5 .

[0038] When the threaded rod 4 is tightened in the threaded hole 3 , the connecting block 5 is fitted on the surface of the flange 2 , and the limiting groove 9 and the connecting groove 73 are aligned and connected.

[0039] The working principle of a clamping device for a slip-on flange provided by the utility model is as follows:

[0040] During operation, the user first splices the two connecting pipes 1 together, threads the threaded rod 4 into the threaded hole 3 and passes through the two flanges 2, so that the connecting block 5 is attached to the surface of one of the flanges 2, and then threads the nut 6 into the threaded rod 4, and the nut 6 is attached to the surface of the other flange 2.

[0041] The user sleeves the mounting ring block 71 on the surface of the connecting pipe 1. As the mounting ring block 71 approaches the flange 2, the connecting block 5 squeezes the extrusion groove 84 of the limit block 83, so that the limit block 83 is squeezed into the interior of the connecting groove 73. The limit block 83 drives the moving block 81 to move. The moving block 81 slides on the surface of the sliding rod 74 through the sliding hole 82 and squeezes the spring 75.

[0042] When the mounting ring block 71 is attached to the flange 2, the limit block 83 is connected to the limit groove 9, the restoring elastic force of the spring 75 pushes the moving block 81 to move, and the moving block 81 drives the limit block 83 to move, and the limit block 83 is embedded in the limit groove 9 to limit the rotation of the connecting block 5, so that the two flanges 2 are clamped.

[0043] Compared with the related art, the clamping device for a slip-on flange provided by the utility model has the following advantages:

[0044] Beneficial effects:

[0045] The utility model provides a clamping device for a slip-on flange, wherein two spliced ​​connecting pipes 1 are spliced ​​together through a threaded rod 4, the threaded rod 4 is threadedly engaged with the threaded holes 3 of the two flange plates 2, and then a clamping plate 7 is sleeved on the surface of the flange plate 2, the restoring elastic force of a spring 75 pushes a moving block 81, and the moving block 81 drives a limiting block 83 to be embedded into a limiting groove 9, so as to limit the threaded rod 4 and prevent the threaded rod 4 from loosening due to vibration. The device has a simple structure and strong practicality, and an operator can add a limit to the connecting block 5 and clamp the threaded rod 4, so that the two flange plates 2 are clamped when assembled together, so as to prevent the flange plate 2 and the connecting pipe 1 from loosening after assembly, thereby extending the service life of the flange plate.

[0046] Second embodiment

[0047] Please refer to Figure 6 and Figure 7 Based on the first embodiment of the present application, a clamping device for a slip-on flange is provided. The second embodiment of the present application provides another clamping device for a slip-on flange. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0048] Specifically, the second embodiment of the present application provides a clamping device for a slip-on flange, which is different in that, in the clamping device for a slip-on flange, a threaded layer 10 is provided on the outer surface of the connecting pipe 1, and a connecting device 11 is fixedly installed on the surface of the mounting ring block 71.

[0049] The connecting device 11 includes a fixed ring block 111 and a thread groove 112 . The fixed ring block 111 is fixedly mounted on the surface of the mounting ring block 71 . The thread groove 112 is opened in the middle of one side of the fixed ring block 111 .

[0050] The fixing ring block 111 moves by threading the threaded layer 10 through the threaded groove 112, and the fixing ring block 111 pushes the installation ring block 71 to move. When the installation ring block 71 is attached to the surface of the flange 2, the limiting groove 9 and the connecting groove 73 are aligned and connected.

[0051] The working principle of a clamping device for a slip-on flange provided by the utility model is as follows:

[0052] During operation, the fixing ring block 111 is firstly threadedly engaged with the outer surface of the threaded layer 10 through the thread groove 112, and the fixing ring block 111 pushes the installation ring block 71 to fit close to the flange 2, which has a limiting effect and makes the fixing ring block 111 not easy to loosen.

[0053] Compared with the related art, the clamping device for a slip-on flange provided by the utility model has the following advantages:

[0054] Beneficial effects:

[0055] The utility model provides a clamping device for a slip-on flange, wherein a fixing ring block 111 is installed on the surface of a connecting pipe 1 through a threaded layer 10, so that a clamping plate 7 is restricted on the surface of a flange 2. The device has a simple structure and strong practicality. The clamping plate 7 is convenient to install and disassemble, and the clamping plate 7 is not easy to loosen. The clamping effect of the clamping plate 7 and the limiting device 8 on the flange 2 is maintained, thereby improving the practicality of the device.

[0056] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A clamping device for a slip-on flange, characterized in that: include: Connecting pipes and flanges; The flange is sleeved on one side of the outer surface of the connecting pipe, threaded holes are provided around the surface of the flange, a threaded rod is threadedly engaged with the inner thread of the threaded hole, a connecting block is fixedly connected to one end of the threaded rod, a nut is threadedly engaged with one side of the outer surface of the threaded rod, and limiting grooves are provided on the six sides of the outer surface of the connecting block; A clamping plate, which is sleeved on the other side of the outer surface of the connecting pipe, and comprises a mounting ring block, a moving groove, a connecting groove, a sliding rod and a spring; The limiting device is slidably installed inside the moving groove, and the limiting device includes a moving block, a sliding hole, a limiting block and an extrusion groove.

2. A clamping device for a slip-on flange according to claim 1, characterized in that: The mounting ring block is sleeved on the surface of the connecting pipe, the two movable grooves are respectively opened on both sides of the mounting ring block surface, the two connecting grooves are respectively opened on the other two sides of the outer surface of the mounting ring block, the sliding rod is fixedly installed inside the movable groove, and the spring is sleeved on one side of the outer surface of the sliding rod.

3. A clamping device for a slip-on flange according to claim 1, characterized in that: The moving block is sleeved on the other side of the outer surface of the slide rod, the sliding hole is opened on one side of the outer surface of the moving block, the limit block is fixedly installed on the other side of the outer surface of the moving block, and the extrusion groove is opened on the surface of the limit block.

4. A clamping device for a slip-on flange according to claim 1, characterized in that: One end of the spring is fixedly connected to the moving block, and the other end of the spring is fixedly connected to the inner cavity wall of the moving groove.

5. The clamping device for a slip-on flange according to claim 1, characterized in that: The communicating groove is communicated with the moving groove.

6. The clamping device for a slip-on flange according to claim 1, characterized in that: The outer surface of the connecting pipe is provided with a threaded layer, and the surface of the mounting ring block is fixedly provided with a connecting device.

7. A clamping device for a slip-on flange according to claim 6, characterized in that: The connecting device comprises a fixed ring block and a thread groove. The fixed ring block is fixedly mounted on the surface of the mounting ring block. The thread groove is opened in the middle of one side of the fixed ring block.

Images