Flange type steel-plastic conversion joint

Abstract

The utility model relates to the technical field of adapter, concretely is a flange type steel plastic conversion joint, including adapter, the flange disc of bolt connection in the bottom of adapter, the pressure disc is connected with bolt on the top of adapter, and the sealing between pressure disc and adapter is sealed through sealing washer, beneficial effect is: when not using or transporting, sealing washer is extremely easy to drop, thereby finding, the base fixed at sealing washer bottom is placed in the placing groove, then the base is rotated, makes the clamping block connected with the base bottom surface follow rotation, the chuck of the bottom end of positioning rod can be clamped into the positioning hole, the special shape of clamping block just matches with the fixed ring, the T-shaped lateral edge of clamping block is limited by the fixed ring, makes the base unable to fall off naturally, presses down the chuck of the bottom end of positioning rod again, and the chuck is clamped into the positioning hole, and the clamping ball of chuck two sides is clamped into the clamping groove, makes the positioning rod unable to fall off under the condition of not having great force, thereby fixes sealing washer, prevents falling off naturally.

Description

Technical Field

[0001] This utility model relates to the field of adapter technology, specifically a flange-type steel-plastic adapter. Background Technology

[0002] Flange-type steel-plastic transition joints are widely used in water supply and drainage, chemical pipelines, and municipal engineering to achieve a reliable connection between steel pipes and plastic pipes. They typically use the cooperation of a flange and a pressure plate to form a seal under axial pressure, thus meeting the transition requirements between pipes of different materials. These transition joints not only need to have good pressure bearing and sealing performance, but also need to ensure reliability during transportation, storage, and installation to avoid the loss of components when not in use.

[0003] In existing technologies, such as the "venting flange steel-plastic conversion joint" (application number CN200520099440.3), a venting pipe is welded onto the inner steel pipe. This reduces leakage, facilitates connection, lowers costs, improves efficiency, and facilitates maintenance. During maintenance and ventilation, it also serves to discharge waste gas. The pipe body and the plastic pipe are connected using an extruded steel bushing, and then a venting pipe is welded onto the inner steel pipe, further reducing leakage, facilitating connection, lowering costs, improving efficiency, and facilitating maintenance.

[0004] However, in the use of existing technology, the flange and pressure plate are tightened and fixed during assembly. When not in use or during transportation, the gasket is often in a loose state and is easily detached from the joint body due to vibration, tilting or human operation. Utility Model Content

[0005] The purpose of this utility model is to provide a flange-type steel-plastic conversion joint to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: including an adapter, a flange bolted to the bottom of the adapter, a pressure plate bolted to the top of the adapter, a sealing gasket between the pressure plate and the adapter, a placement groove on the surface of the adapter, a base placed in the placement groove, and the base being limited in the placement groove by a locking structure.

[0007] Preferably, the sealing gasket is fixed to the upper surface of the base.

[0008] Preferably, the placement groove is an annular groove, and the base is embedded in the placement groove.

[0009] Preferably, the locking structure includes a locking block, a positioning rod, a limiting block, a fixing ring, and a chuck. The locking block has an inverted "T" shaped cross-section, and there are four sets of locking blocks. All four sets of locking blocks are fixed to the lower surface of the base, and the four sets of locking blocks are arranged in a circumferential array around the central axis of the base. There are four sets of fixing rings, with two fixing rings in each set. Every two fixing rings are fixed to the inner and outer rings of the placement groove, and the two fixing rings are located on both sides of the "T" shape of the locking block. The positioning rod passes through the base, and the limiting block is fixed to the outer ring of the positioning rod. The limiting block is located above the base. The chuck is at the bottom end of the positioning rod, and there are two sets of positioning rods, which are arranged in a circumferential array around the base.

[0010] Preferably, the upper surfaces of the two outer rings are provided with positioning holes, the positioning rods correspond one-to-one with the positioning holes, and the chuck and the positioning holes are the same size. The chuck balls on both sides of the chuck are inserted into the slots opened in the inner wall of the positioning holes.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The flange-type steel-plastic conversion joint proposed in this utility model addresses the issue that the sealing gasket is prone to falling off and becoming difficult to locate when not in use or during transportation. The base, fixed to the bottom of the sealing gasket, is placed in the placement groove. Rotating the base causes the locking block connected to the bottom surface of the base to rotate as well. The chuck at the bottom of the positioning rod can then engage with the positioning hole. The special shape of the locking block perfectly matches the fixing ring, and the T-shaped transverse edge of the locking block is limited by the fixing ring, preventing the base from falling off naturally. Pressing down the positioning rod causes the chuck at the bottom of the positioning rod to engage with the positioning hole, and the locking balls on both sides of the chuck engage with the locking grooves, ensuring that the positioning rod cannot fall off without significant force, thus fixing the sealing gasket and preventing it from falling off naturally. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Schematic diagram of the cross-sectional structure along line A; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the adapter structure of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point B.

[0012] In the diagram: 1. Flange; 2. Adapter; 3. Pressure plate; 4. Sealing gasket; 5. Placement groove; 6. Base; 7. Clamping block; 8. Positioning rod; 9. Limiting block; 10. Fixing ring; 11. Positioning hole; 12. Clamping groove; 13. Chuck. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Example 1 Please see Figures 1-5 This utility model provides a technical solution: a flange-type steel-plastic conversion joint, including a conversion joint 2, a flange 1 bolted to the bottom of the conversion joint 2, a pressure plate 3 bolted to the top of the conversion joint 2, a sealing gasket 4 sealing the pressure plate 3 and the conversion joint 2, a placement groove 5 opened on the surface of the conversion joint 2, a base 6 placed in the placement groove 5, the sealing gasket 4 fixed to the upper surface of the base 6, the placement groove 5 is an annular groove, and the base 6 is embedded in the placement groove 5; Specifically, when installing the flange-type steel-plastic conversion joint, first fix the sealing gasket 4 to the upper surface of the base 6, and then embed the base 6 into the placement groove 5 opened on the surface of the conversion joint 2. Then rotate the base 6 so that the locking block 7 connected to its bottom surface rotates accordingly. When the locking block 7 rotates to the position matching the fixing ring 10, its T-shaped horizontal edge is limited by the fixing ring 10, so that the base 6 is in a restricted state and cannot fall off naturally. Connect the flange 1 to the conversion joint 2 with bolts, and then install the pressure plate 3 on top of the conversion joint 2 with bolts, so that the sealing gasket 4 between the pressure plate 3 and the conversion joint 2 forms an effective seal, thereby completing the overall installation of the conversion joint and preventing the sealing gasket 4 from falling off or being lost naturally before and after installation.

[0015] Example 2 Based on Embodiment 1, in order to fix the sealing gasket 4 and prevent it from being lost, a locking structure is proposed to limit it within the placement groove 5. The locking structure includes a locking block 7, a positioning rod 8, a limiting block 9, a fixing ring 10, and a chuck 13. The locking block 7 has an inverted "T" shaped cross-section, and there are four sets of locking blocks 7. All four sets of locking blocks 7 are fixed to the lower surface of the base 6, and the four sets of locking blocks 7 are arranged in a circular array around the central axis of the base 6. There are four sets of fixing rings 10, and each set of fixing rings 10 has two rings. Every two fixing rings 10 are fixed to the inner ring of the placement groove 5 and the... The outer ring has two fixing rings 10 located on both sides of the "T" shape of the locking block 7. The positioning rod 8 passes through the base 6. The limiting block 9 is fixed on the outer ring of the positioning rod 8 and is located above the base 6. The chuck 13 is at the bottom of the positioning rod 8. There are two sets of positioning rods 8. The positioning rods 8 are distributed in a circumferential array around the base 6. The upper surface of the two fixing rings 10 on the outer ring has positioning holes 11. The positioning rods 8 correspond one-to-one with the positioning holes 11. The chuck 13 and the positioning holes 11 have the same size. The chuck balls on both sides of the chuck 13 are inserted into the slots 12 opened on the inner wall of the positioning holes 11. Specifically, during transportation, to prevent the sealing gasket 4 from falling off and being lost, the base 6 fixed to the bottom of the sealing gasket 4 is locked in the placement groove 5 by a locking structure. During installation, the base 6 is first placed into the placement groove 5 and rotated, causing the four sets of locking blocks 7 fixed to the lower surface of the base 6 to rotate synchronously. When the locking blocks 7 rotate to the position corresponding to the fixing ring 10, during rotation, according to... Figure 3 It can be seen that the chuck 13 is embedded in the groove at the bottom of the base 6 and will not touch the fixing ring 10 when rotating. The transverse structure of the cross section of the locking block 7 is inverted "T" shape and is limited by the paired fixing rings 10, thereby restricting the axial tendency of the base 6 to come out. Then, the positioning rod 8 is pressed down, so that the chuck 13 at the bottom of the positioning rod 8 enters into the corresponding positioning hole 11. The locking balls on both sides of the chuck 13 further engage in the locking grooves 12 provided on the inner wall of the positioning hole 11. With the cooperation of the limiting block 9, the positioning rod 8 maintains a stable locked state when there is no large external force, thereby reliably fixing the base 6, thus achieving stable fixing of the sealing gasket 4 and preventing it from falling off naturally when not in use or during transportation.

[0016] During use, to prevent the sealing gasket 4 from falling off and being lost during non-use or transportation, the base 6 with the sealing gasket 4 fixed on it is placed in the placement groove 5. The base 6 is then rotated, causing the four sets of locking blocks 7 on the lower surface of the base 6 to rotate accordingly. During rotation, the locking blocks 7 gradually engage with the fixing ring 10. Their inverted "T"-shaped cross-section limits the horizontal edge of the "T" shape of the locking blocks 7 to the fixing ring 10, thus providing a limiting effect against natural falling off the base 6 before locking. Then, the positioning button is pressed. The positioning rod 8 aligns the chuck 13 at the bottom of the positioning rod 8 with the positioning hole 11 opened on the fixing ring 10, and the ball bearings on both sides of the chuck 13 are further embedded in the groove 12 on the inner wall of the positioning hole 11. With the cooperation of the limiting block 9, the positioning rod 8 maintains a stable locked state without the application of external force, thereby reliably limiting the base 6 in the placement groove 5, realizing the continuous fixation of the sealing gasket 4, so that the sealing gasket 4 is not easy to fall off even when the conversion connector is not installed or during transportation, effectively avoiding the problem of the sealing gasket 4 being lost.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flanged steel-plastic conversion joint, comprising a conversion joint (2), a flange (1) bolted to the bottom of the conversion joint (2), a pressure plate (3) bolted to the top of the conversion joint (2), and a sealing gasket (4) between the pressure plate (3) and the conversion joint (2), characterized in that: The adapter (2) has a placement groove (5) on its surface, and a base (6) is placed in the placement groove (5). The base (6) is limited in the placement groove (5) by a locking structure.

2. The flange-type steel-plastic transition joint according to claim 1, characterized in that: The sealing gasket (4) is fixed to the upper surface of the base (6).

3. A flange-type steel-plastic transition joint according to claim 1, characterized in that: The placement groove (5) is an annular groove, and the base (6) is embedded in the placement groove (5).

4. A flange-type steel-plastic transition joint according to claim 1, characterized in that: The locking structure includes a locking block (7), a positioning rod (8), a limiting block (9), a fixing ring (10), and a chuck (13). The locking block (7) is a "T"-shaped structure with an inverted cross section. There are four sets of locking blocks (7), and all four sets of locking blocks (7) are fixed on the lower surface of the base (6). The four sets of locking blocks (7) are arranged in a circular array around the central axis of the base (6). There are four sets of fixing rings (10), and each set of fixing rings (10) has two rings. Every two fixing rings (10) are fixed in the inner and outer rings of the placement groove (5). The two fixing rings (10) are located on both sides of the "T" shape of the locking block (7). The positioning rod (8) passes through the base (6). The limiting block (9) is fixed on the outer ring of the positioning rod (8). The limiting block (9) is located above the base (6). The chuck (13) is at the bottom of the positioning rod (8). There are two sets of positioning rods (8), and the positioning rods (8) are arranged in a circular array around the base (6).

5. A flange-type steel-plastic transition joint according to claim 4, characterized in that: The two outer rings (10) are provided with positioning holes (11) on their upper surfaces. The positioning rods (8) correspond one-to-one with the positioning holes (11). The chuck (13) and the positioning holes (11) are the same size. The ball bearings on both sides of the chuck (13) are inserted into the slots (12) opened on the inner wall of the positioning holes (11).

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