Rotary loose joint of sewage filter easy to repair

Abstract

The utility model discloses and provides a rotary loose joint of an easy-to-repair sewage filter, which is simple to repair, low in repair cost and capable of effectively prolonging the service life. The device comprises a body and a repairing ring, a water inlet is formed in the water inlet end of the body, a water outlet is formed in the water outlet end of the body, a channel communicated with the water inlet and the water outlet is further arranged in the body, an external water supply pipe is fixedly connected with the water inlet, and the water outlet end of the body is connected to the water inlet end of an external water outlet pipe in a sleeved mode. A plurality of sealing rings are arranged between the outer side of the water inlet end of the external water outlet pipe and the inner wall of the water outlet, so that the water inlet end of the external water outlet pipe can rotate and be hermetically connected with the water outlet; the outer diameter of the water inlet end of the body is smaller than that of the water outlet end of the body, so that an annular step is formed at the joint of the water inlet end and the water outlet end of the body; the repairing ring is connected to the outer side of the water inlet end of the body in a sleeving mode and covers the annular step. The rotary loose joint can be applied to the technical field of rotary loose joints of sewage filters easy to repair.

Description

Technical Field

[0001] The utility model is applied to the technical field of rotary unions, and particularly relates to an easily repairable rotary union of a sewage filter. Background Art

[0002] Water supply plants usually use filter membranes for filtration when they rely on sewage filters to purify water, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the sewage filter, where A-purification and filtration equipment housing, B-swinging water spray mechanism, C-water purification filter membrane, D-conventional rotary union, and E-external pipe threaded shaft. After a certain period of filtration, the filter membrane surface will be covered with filter residue. In order to ensure effective filtration, a water spray mechanism is often used for water spraying and flushing. The filter residue that falls off will flow to the sewage tank with the flushing water. In order to ensure flushing at multiple positions and angles, the water spray mechanism often needs to be driven by a motor to reciprocate at a certain angle. Therefore, a rotary union is required to connect the water pipe of the water spray mechanism.

[0003] Since the water supply plant needs to meet the long-term continuous water supply, the water purification system also needs to operate for a long time at a high intensity. The water spraying mechanism used to flush the filter residue in the entire precision filter water purification system needs to operate continuously. The water spraying mechanism will generate stress when it rotates radially. The water pipe and the water spraying mechanism are sealed and connected by a rotary joint. The accumulated stress will be continuously released at the sealing connection position of the water pipe, causing cumulative extrusion on the traditional rotary joint. Long-term uninterrupted extrusion will cause damage to the side wall of the traditional rotary joint and produce fatigue cracks, thereby causing water leakage.

[0004] like Figure 2 As shown, when fatigue cracks appear on the side wall of a traditional rotary union, the conventional remedial and repair method is to apply sealant on the damaged surface. However, this repair measure can only achieve a short-term leak-stopping effect. If a new rotary union is replaced, it is expensive and inconvenient to install, which not only increases costs but also brings a burden to maintenance personnel. Utility Model Content

[0005] The technical task of the utility model is to provide a sewage filter rotary joint which is easy to repair, has low repair cost and can effectively extend the service life in view of the above shortcomings.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows: the utility model includes a main body, the water inlet end of the main body is provided with a water inlet, the water outlet end of the main body is provided with a water outlet, the main body is also provided with a channel connecting the water inlet and the water outlet, the external water supply pipe is fixedly connected to the water inlet, the water outlet end of the main body is sleeved on the water inlet end of the external water outlet pipe, a plurality of sealing rings are arranged between the outer side of the water inlet end of the external water outlet pipe and the inner wall of the water outlet, so that the water inlet end of the external water outlet pipe can be rotatably and sealedly connected with the water outlet; the outer diameter of the water inlet end of the main body is smaller than the outer diameter of the water outlet end of the main body, so that an annular step is formed at the connection between the water inlet end of the main body and the water outlet end of the main body, and the easily repairable sewage filter rotary joint also includes a repair ring, the repair ring is sleeved on the outer side of the water inlet end of the main body, and the repair ring covers the annular step.

[0007] Furthermore, the outer diameter of the repair ring is the same as the outer diameter of the water outlet end of the body.

[0008] Furthermore, the annular surface of the annular step is inclined along the water flow direction.

[0009] Furthermore, one side of the repair ring is provided with a conical inclined surface adapted to the annular surface of the annular step.

[0010] Furthermore, a waterproof sealing cone ring adapted to the annular surface of the annular step is provided on the conical inclined surface.

[0011] Furthermore, the maximum outer diameter of the waterproof sealing cone ring is smaller than the outer diameter of the water outlet end of the body.

[0012] Furthermore, the water inlet end of the main body is provided with an internal thread, and the external water supply pipe is threadedly and sealingly connected to the water inlet end of the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of an existing sewage filter;

[0014] Figure 2 It is a structural schematic diagram of the rotary live joint body of the utility model;

[0015] Figure 3 It is a partial cross-sectional view of the utility model;

[0016] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0017] Figure 5 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0018] In order to more clearly understand the features and advantages of the present invention, the following examples are given in conjunction with the attached Figures 2 to 5 The utility model is further described. In this embodiment, the utility model includes a body 1, the water inlet end of the body 1 is provided with a water inlet 2, the water outlet end of the body 1 is provided with a water outlet 3, the body 1 is also provided with a channel 4 connecting the water inlet 2 and the water outlet 3, the external water supply pipe 5 is fixedly connected to the water inlet 2, the water outlet end of the body 1 is sleeved on the water inlet end of the external water outlet pipe 6, and a plurality of sealing rings 7 are arranged between the outer side of the water inlet end of the external water outlet pipe 6 and the inner wall of the water outlet 3, so that the water inlet end of the external water outlet pipe 6 can be rotated and sealed with the water outlet 3; the outer diameter of the water inlet end of the body 1 is smaller than the outer diameter of the water outlet end of the body 1, so that an annular step 8 is formed at the connection between the water inlet end of the body 1 and the water outlet end of the body 1, and the easily repairable sewage filter rotary joint also includes a repair ring 9, which is sleeved on the outer side of the water inlet end of the body 1, and the repair ring 9 covers the annular step 8. In this embodiment, the water inlet end of the body 1 is provided with an internal thread 12, and the external water supply pipe 5 is threadedly sealed and connected to the water inlet end of the body 1. The main pipeline of the sewage precision filter nozzle will release stress during radial swinging, and part of the stress is generated on the rotating joint body. The stress is released at the weakest position on the rotating joint body, so fatigue fracture marks will be generated at the weakest position of the rotating joint after long-term operation. In practice, we found that cracks are prone to occur on the side wall of the connection between the water inlet end of the body 1 and the water outlet end of the body 1, resulting in water leakage. That is, when it occurs at the annular step 8, the gap between the repair ring 9 and the water outlet end of the body 1 and the gap between the repair ring 9 and the water outlet end of the body 1 are sealed by welding, thereby effectively isolating the cracks from the outside world. The entire repair process does not require disassembly and replacement of parts, and the repair range is large, saving maintenance costs.

[0019] In this embodiment, the outer diameter of the repair ring 9 is the same as the outer diameter of the water outlet end of the body 1. With such a design, the repair ring 9 can be kept flush with the water outlet end of the body 1, and the repair ring 9 is integrated with the body 1 after the repair is completed, which is also conducive to reducing the difficulty of welding and shortening the repair time.

[0020] In this embodiment, the annular surface of the annular step 8 is inclined along the water flow direction. This design can reduce local stress, avoid premature cracks in the flexible joint, and extend the service life of the rotary flexible joint of the utility model easy-to-repair sewage filter.

[0021] In this embodiment, a conical inclined surface 10 matching the annular surface of the annular step 8 is provided on one side of the repair ring 9, and a waterproof sealing cone ring 11 matching the annular surface of the annular step 8 is provided on the conical inclined surface 10. Through the fitting design of the conical inclined surface 10 and the waterproof sealing cone ring 11, the repaired rotary joint can be more tightly sealed, and the requirements for welding sealing are also reduced.

[0022] In this embodiment, the maximum outer diameter of the waterproof sealing cone ring 11 is smaller than the outer diameter of the water outlet end of the body 1. Such a design can avoid burns to the waterproof sealing cone ring 11 during welding.

[0023] Although the embodiments of the present invention are described in terms of practical solutions, they do not constitute a limitation on the meaning of the present invention. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict. For those skilled in the art, the modifications to the implementation schemes and the combinations with other schemes based on this specification are obvious.

Claims

1. A reparable sewage filter rotary joint, comprising a body (1), wherein the water inlet end of the body (1) is provided with a water inlet (2), the water outlet end of the body (1) is provided with a water outlet (3), the body (1) is further provided with a channel (4) communicating the water inlet (2) and the water outlet (3), an external water supply pipe (5) is fixedly connected to the water inlet (2), the water outlet end of the body (1) is sleeved on the water inlet end of the external water outlet pipe (6), a plurality of sealing rings (7) are provided between the outer side of the water inlet end of the external water outlet pipe (6) and the inner wall of the water outlet (3), so that the water inlet end of the external water outlet pipe (6) can be rotatably and sealedly connected to the water outlet (3); the outer diameter of the water inlet end of the body (1) is smaller than the outer diameter of the water outlet end of the body (1), so that an annular step (8) is formed at the connection between the water inlet end of the body (1) and the water outlet end of the body (1), characterized in that: The easily repairable sewage filter rotary joint further comprises a repair ring (9), wherein the repair ring (9) is sleeved on the outside of the water inlet end of the body (1), and the repair ring (9) covers the annular step (8).

2. The easily repairable sewage filter rotary joint according to claim 1 is characterized by: The outer diameter of the repair ring (9) is the same as the outer diameter of the water outlet end of the body (1).

3. The easily repairable sewage filter rotary joint according to claim 1, characterized in that: The annular surface of the annular step (8) is arranged to be inclined along the direction of water flow.

4. The easily repairable sewage filter rotary joint according to claim 3 is characterized by: One side of the repair ring (9) is provided with a conical inclined surface (10) that matches the annular surface of the annular step (8).

5. The easily repairable sewage filter rotary joint according to claim 4, characterized in that: The conical inclined surface (10) is provided with a waterproof sealing cone ring (11) which matches the annular surface of the annular step (8).

6. The easily repairable sewage filter rotary joint according to claim 5, characterized in that: The maximum outer diameter of the waterproof sealing cone ring (11) is smaller than the outer diameter of the water outlet end of the body (1).

7. The easily repairable sewage filter rotary joint according to claim 1, characterized in that: The water inlet end of the body (1) is provided with an internal thread (12), and the external water supply pipe (5) is threadedly and sealingly connected to the water inlet end of the body (1).

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