CN219549898U - Loose joint elbow with water filtering function - Google Patents

Abstract

The utility model belongs to the technical field of loose joint elbows, and particularly relates to a loose joint elbow with a water filtering function. Comprising: the elbow body with the water inlet and the water outlet is characterized in that a detachable bolt is detachably connected to the middle of the elbow body, a part of the detachable bolt is positioned inside the elbow body, a cylindrical filter screen is connected to the end part of the detachable bolt positioned inside the elbow body, and the filter screen is positioned inside the elbow body. Tap water enters the elbow body from the water inlet of the elbow body, the filter screen filters the tap water, and the filtered tap water enters the water inlet pipe of the water heater through the water outlet of the elbow body for water supply; the loose joint elbow has a filtering function, so that impurities are not easy to accumulate at the loose joint elbow after long-time use, and the problem of pipeline blockage is not easy to occur; when the filter screen is cleaned, the detachable bolt is detached, after the filter screen is cleaned, the detachable bolt with the filter screen is assembled with the elbow body, so that the filter screen is efficiently, simply and conveniently cleaned.

Description

Loose joint elbow with water filtering function

Technical Field

The utility model belongs to the technical field of loose joint elbows, and particularly relates to a loose joint elbow with a water filtering function.

Background

Taking an electric water heater as an example, water supply pipelines of the electric water heater are often connected by adopting connectors, a loose joint elbow is one of various connectors for pipeline connection, the application range in pipeline installation construction is very wide, the conveying direction of the pipeline can be changed, and the conveying direction can be 45 degrees, 90 degrees and the like. In practical use, the loose-joint elbow is connected in a threaded manner.

The existing loose joint elbow in the market basically has no filtering function, and impurities are easy to accumulate at the loose joint elbow after long-time use, so that the problem of pipeline blockage occurs.

Disclosure of Invention

In order to solve the problems in the prior art, namely to enable the loose-joint elbow to have a filtering function, impurities are not easy to accumulate at the loose-joint elbow after long-time use, and the problem of pipeline blockage is reduced, the utility model provides the loose-joint elbow with a water filtering function.

The embodiment of the utility model provides a loose joint elbow with a water filtering function, which comprises the following components: the elbow body with the water inlet and the water outlet, the middle part of the elbow body is detachably connected with a detachable bolt, a part of the detachable bolt is positioned inside the elbow body, the end part of the detachable bolt positioned inside the elbow body is connected with a cylindrical filter screen, and the filter screen is positioned inside the elbow body.

By adopting the technical scheme, in the actual use process, the loose joint elbow provided by the utility model can be used for perfect installation of a daily waterway; the manufacturing and mounting cost is low, the size is small, and the problem that nuts are easy to clamp can be solved; the design and molding process is simple and practical, and the labor cost is reduced. Tap water enters the elbow body from the water inlet of the elbow body, the tap water is filtered through the filter screen, and the filtered tap water enters the water inlet pipe of the water heater through the water outlet of the elbow body for water supply; the loose joint elbow provided by the technical scheme of the utility model has a filtering function, and the problems that impurities are not easy to accumulate at the loose joint elbow and the pipeline is not easy to be blocked after long-time use are solved. When the filter screen filters accumulated impurities and needs to be cleaned, the detachable bolt is detached to clean the filter screen, and after the filter screen is cleaned, the detachable bolt with the filter screen is assembled and connected with the elbow body, so that the efficient, simple and convenient cleaning of the filter screen is realized.

In the preferable technical scheme of the loose-joint elbow with the water filtering function, the side wall of the filter screen with the filter holes faces to the inner passage of the elbow body.

Through adopting above-mentioned technical scheme, can increase the effective filtration area of filter screen and the area of contact of rivers, improve the efficiency that the filter screen filtered impurity, reinforcing filter effect.

In the preferable technical scheme of the loose-joint elbow with the water filtering function, the end part of the detachable bolt positioned in the elbow body is provided with a clamping part, and the detachable bolt is detachably connected with the filter screen through the clamping part.

Through adopting above-mentioned technical scheme, removable bolt can carry out detachable connection through its self joint portion with the filter screen simply and swiftly, and the assembly of the filter screen of being convenient for is disassembled, is maintained the renew with later stage.

In the preferable technical scheme of the loose joint elbow with the water filtering function, the filter screen is made of stainless steel raw materials.

Through adopting above-mentioned technical scheme, adopt stainless steel raw and other materials to make the filter screen, can make the filter screen in the middle of daily long-time use, avoid filter screen self to rust, keep the filter performance of filter screen stability.

In the preferable technical scheme of the loose joint elbow with the water filtering function, the filter screen is made of rubber raw materials.

Through adopting above-mentioned technical scheme, rubber raw and other materials itself low in manufacturing cost, corrosion resistance is stronger moreover, adopts rubber raw and other materials to make the filter screen, not only can reduce the manufacturing cost of filter screen, in the daily use of slipknot elbow in addition, can make the filter screen filter the impurity in the aquatic steadily high-efficient.

In the preferable technical scheme of the loose joint elbow with the water filtering function, a plurality of protruding stripes are arranged on the circumferential side face of the detachable bolt, and a screwing groove is formed in the end face, deviating from the elbow body, of the detachable bolt.

By adopting the technical scheme, the detachable bolt can be stably screwed through the raised stripes, so that the detachable bolt is convenient to install or detach; the external screwdriver is inserted into the screwing groove, so that the screwing groove can play a role, and the detachable bolt can be conveniently screwed.

In the preferable technical scheme of the loose joint elbow with the water filtering function, the part of the detachable bolt, which is used for being connected with the elbow body, is sleeved with a main sealing ring, the main sealing ring is positioned inside the elbow body, and the detachable bolt and the elbow body tightly extrude the main sealing ring together.

Through adopting above-mentioned technical scheme, the main sealing washer can increase the leakproofness of removable bolt and elbow body junction, avoids its junction to leak, strengthens the sealing performance of removable bolt and elbow body junction, makes the loose joint elbow can steadily normal use for a long time.

In the preferable technical scheme of the loose joint elbow with the water filtering function, an auxiliary sealing ring is sleeved at the part of the detachable bolt, which is used for being connected with the elbow body, and is positioned inside the elbow body, and the detachable bolt and the elbow body tightly extrude the auxiliary sealing ring together.

By adopting the technical scheme, the auxiliary sealing ring can increase the tightness of the joint of the detachable bolt and the elbow body, avoid the leakage of the joint, strengthen the sealing performance of the joint of the detachable bolt and the elbow body, and enable the loose joint elbow to be used normally and stably for a long time.

In the preferable technical scheme of the loose-joint elbow with the water filtering function, the water outlet thread of the elbow body is connected with an annular detachable nut, the end part of the detachable nut, which deviates from the elbow body, is rotationally connected with the annular loose-joint nut, and the circumferential side wall of the loose-joint nut is provided with threads for being connected with a pipeline.

Through adopting above-mentioned technical scheme, when being connected loose joint elbow and the inlet tube of water heater, carry out threaded connection with loose joint nut and the inlet tube of water heater, can realize the simple and convenient quick stable assembly of loose joint elbow and water heater inlet tube.

In the preferable technical scheme of the loose-joint elbow with the water filtering function, a third sealing ring is sleeved at the position, connected with the elbow body, of the detachable nut, the third sealing ring is located inside the elbow body, and the detachable nut and the elbow body tightly extrude the third sealing ring together.

Through adopting above-mentioned technical scheme, the sealing performance of the junction of removable nut and elbow body can be increased to the third sealing washer, makes the slipknot elbow can be stable in daily long-time use carry rivers, keeps high tightness, avoids leaking.

It can be appreciated by those skilled in the art that the embodiment of the present utility model provides a loose joint elbow with a water filtering function, including: the elbow body with the water inlet and the water outlet is characterized in that a detachable bolt is detachably connected to the middle of the elbow body, a part of the detachable bolt is positioned inside the elbow body, a cylindrical filter screen is connected to the end part of the detachable bolt positioned inside the elbow body, and the filter screen is positioned inside the elbow body.

In the actual use process, the loose joint elbow provided by the utility model can be used for perfect installation of a daily waterway; the manufacturing and mounting cost is low, the size is small, and the problem that nuts are easy to clamp can be solved; the design and molding process is simple and practical, and the labor cost is reduced.

Tap water enters the elbow body from the water inlet of the elbow body, the tap water is filtered through the filter screen, and the filtered tap water enters the water inlet pipe of the water heater through the water outlet of the elbow body for water supply; the loose joint elbow provided by the technical scheme of the utility model has a filtering function, and the problems that impurities are not easy to accumulate at the loose joint elbow and the pipeline is not easy to be blocked after long-time use are solved.

When the filter screen filters accumulated impurities and needs to be cleaned, the detachable bolt is detached to clean the filter screen, and after the filter screen is cleaned, the detachable bolt with the filter screen is assembled and connected with the elbow body, so that the efficient, simple and convenient cleaning of the filter screen is realized.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a schematic diagram of the whole structure of a loose-joint elbow with a water filtering function in an embodiment of the utility model;

FIG. 2 is a schematic diagram of the explosive structure of the components of the loose-joint elbow with water filtering function in the embodiment of the utility model;

fig. 3 is an exploded view of the removable bolt and the filter screen separated from each other in an embodiment of the present utility model.

Reference numerals:

100-elbow body; 110-water inlet; 120-water outlet;

200-removable bolts; 210-raised stripes; 220-screwing the groove; 230-a main seal ring; 240-auxiliary sealing rings; 250-clamping part;

300-filtering net;

400-removable nuts; 410-a third seal ring;

500-loose joint nuts.

Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

As described above in the background art, the loose joint elbow is one of various joints for pipe connection, and has a very wide application range in pipe installation and construction, and can change the conveying direction of a pipe, specifically 45 °, 90 ° and the like. In practical use, the loose-joint elbow is connected in a threaded manner.

The existing loose joint elbow in the market basically has no filtering function, and impurities are easy to accumulate at the loose joint elbow after long-time use, so that the problem of pipeline blockage occurs.

Therefore, in order to improve or solve the technical problems, the embodiment of the utility model provides the loose joint elbow with the water filtering function, and in the technical scheme provided by the embodiment of the utility model, the loose joint elbow can be used for perfect installation of a daily waterway; the manufacturing and mounting cost is low, the size is small, and the problem that nuts are easy to clamp can be solved; the design and molding process is simple and practical, and the labor cost is reduced.

Tap water enters the elbow body from the water inlet of the elbow body, the tap water is filtered through the filter screen, and the filtered tap water enters the water inlet pipe of the water heater through the water outlet of the elbow body for water supply; the loose joint elbow provided by the technical scheme of the utility model has a filtering function, and the problems that impurities are not easy to accumulate at the loose joint elbow and the pipeline is not easy to be blocked after long-time use are solved.

When the filter screen filters accumulated impurities and needs to be cleaned, the detachable bolt is detached to clean the filter screen, and after the filter screen is cleaned, the detachable bolt with the filter screen is assembled and connected with the elbow body, so that the efficient, simple and convenient cleaning of the filter screen is realized.

Fig. 1 is a schematic structural diagram of the whole loose-joint elbow with a water filtering function in the embodiment of the utility model, and fig. 2 is an exploded structural diagram of each part of the loose-joint elbow with the water filtering function in the embodiment of the utility model. Referring to fig. 1 and 2, an embodiment of the present utility model provides a loose joint elbow with a water filtering function, including: the elbow body 100 with the water inlet 110 and the water outlet 120 is characterized in that a detachable bolt 200 is detachably connected to the middle of the elbow body 100, a part of the detachable bolt 200 is positioned inside the elbow body 100, a cylindrical filter screen 300 is connected to the end of the detachable bolt 200 positioned inside the elbow body 100, and the filter screen 300 is positioned inside the elbow body 100.

Illustratively, in the embodiment of the present utility model, the circumferential side wall of the portion of the detachable bolt 200 to be connected with the elbow body 100 is pre-formed with external threads, and the circumferential inner wall of the portion of the elbow body 100 to be connected with the detachable bolt 200 is pre-formed with internal threads, and the detachable bolt 200 is screw-connected with the elbow body 100. The circumferential side wall of the filter screen 300 is provided with a plurality of uniformly distributed filter holes in advance, and the filter screen 300 is positioned in the flow channel inside the elbow body 100 to filter impurities in water.

By adopting the technical scheme, in the actual use process, the loose joint elbow provided by the utility model can be used for perfect installation of a daily waterway; the manufacturing and mounting cost is low, the size is small, and the problem that nuts are easy to clamp can be solved; the design and molding process is simple and practical, and the labor cost is reduced. Tap water enters the elbow body 100 from the water inlet 110 of the elbow body 100, the tap water is filtered through the filter screen 300, and the filtered tap water enters the water inlet pipe of the water heater through the water outlet 120 of the elbow body 100 for water supply; the loose joint elbow provided by the technical scheme of the utility model has a filtering function, and the problems that impurities are not easy to accumulate at the loose joint elbow and the pipeline is not easy to be blocked after long-time use are solved. When the filter screen 300 filters more accumulated impurities and needs to be cleaned, the detachable bolt 200 is detached to clean the filter screen 300, and after the filter screen 300 is cleaned, the detachable bolt 200 with the filter screen 300 is assembled and connected with the elbow body 100, so that the efficient, simple and convenient cleaning of the filter screen 300 is realized.

Referring to fig. 1 and 2, in an exemplary embodiment of the present utility model, a sidewall of the filter screen 300 with a filter hole faces an inner passage of the elbow body 100, and a center line of the filter screen 300 forms an included angle with a center line of a flow channel inside the elbow body 100, and the included angle ranges from 0 ° to 90 °.

Through adopting above-mentioned technical scheme, can increase the effective filtration area of filter screen 300 and the area of contact of rivers, improve the efficiency of filter screen 300 filtration impurity, strengthen the filter effect.

Referring to fig. 2 and 3, in an embodiment of the present utility model, an end portion of a detachable bolt 200 located inside the elbow body 100 is provided with a clamping portion 250, and the detachable bolt 200 is detachably connected to the filter screen 300 through the clamping portion 250.

Illustratively, the clamping portion 250 is integrally formed with the detachable bolt 200, and the clamping portion 250 can be inserted into the filter screen 300 and is in damping fit with the filter screen 300, and the end of the filter screen 300 abuts against the corresponding annular end surface of the detachable bolt 200.

Through adopting above-mentioned technical scheme, removable bolt 200 can carry out detachable connection through its self joint portion 250 with filter screen 300 simply and conveniently swiftly, the assembly of the filter screen 300 of being convenient for and later stage disassemble, maintenance renew.

Referring to fig. 2 and 3, in an exemplary embodiment of the present utility model, the filter screen 300 is made of stainless steel raw material.

By adopting the technical scheme, the filter screen 300 is manufactured by adopting stainless steel raw materials, so that the filter screen 300 can be prevented from rusting during daily long-time use, and the stable filtering performance of the filter screen 300 is maintained.

Referring to fig. 2 and 3, in an exemplary embodiment of the present utility model, the filter screen 300 is made of rubber raw material.

Through adopting above-mentioned technical scheme, rubber raw and other materials itself low in manufacturing cost, corrosion resistance is stronger moreover, adopts rubber raw and other materials to make filter screen 300, not only can reduce the manufacturing cost of filter screen 300, in the daily use of slipknot elbow in addition, can make filter screen 300 filter the impurity in the aquatic steadily high-efficient.

Referring to fig. 1 and 2, in an embodiment of the present utility model, an exemplary circumferential side surface of the detachable bolt 200 is provided with a plurality of protruding stripes 210, and an end surface of the detachable bolt 200 facing away from the elbow body 100 is provided with a screwing groove 220.

Illustratively, each raised stripe 210 is circumferentially uniform about the centerline of the removable bolt 200; the driving recess 220 is used for an external tool to be inserted to drive the detachable bolt 200, and the external tool may be a screwdriver or other screwdriver-like tool.

By adopting the above technical scheme, the detachable bolt 200 can be stably screwed by the raised stripes 210, so that the detachable bolt 200 can be conveniently installed or detached; by inserting an external screwdriver or other screwdriver-like tool into the driving recess 220, the driving recess 220 can be made functional to facilitate the turning of the removable bolt 200.

Referring to fig. 2 and 3, in the embodiment of the present utility model, an exemplary portion of the detachable bolt 200 for connecting with the elbow body 100 is sleeved with a main sealing ring 230, the main sealing ring 230 is located inside the elbow body 100, and the detachable bolt 200 and the elbow body 100 tightly press the main sealing ring 230 together.

By adopting the above technical scheme, the main sealing ring 230 can increase the tightness of the joint of the detachable bolt 200 and the elbow body 100, avoid the leakage of the joint, enhance the sealing performance of the joint of the detachable bolt 200 and the elbow body 100, and enable the loose joint elbow to be used normally and stably for a long time.

Referring to fig. 2 and 3, in the embodiment of the present utility model, an auxiliary sealing ring 240 is sleeved on the portion of the detachable bolt 200, which is used to be connected to the elbow body 100, the auxiliary sealing ring 240 is located inside the elbow body 100, the detachable bolt 200 and the elbow body 100 tightly squeeze the auxiliary sealing ring 240 together, and the auxiliary sealing ring 240 is located between the filter screen 300 and the main sealing ring 230.

By adopting the technical scheme, the auxiliary sealing ring 240 can increase the tightness of the joint of the detachable bolt 200 and the elbow body 100, avoid the leakage of the joint, strengthen the sealing performance of the joint of the detachable bolt 200 and the elbow body 100, and enable the loose joint elbow to be used normally and stably for a long time.

Referring to fig. 1 and 2, in an embodiment of the present utility model, an annular detachable nut 400 is screwed to the water outlet 120 of the elbow body 100, an annular loose-joint nut 500 is rotatably connected to an end of the detachable nut 400 facing away from the elbow body 100, and a screw thread is provided on a circumferential side wall of the loose-joint nut 500 for connection with a pipe.

Illustratively, the end of the removable nut 400 facing away from the elbow body 100 is integrally formed with a collar, and the inner wall of the loose-joint nut 500 facing the end of the removable nut 400 is integrally formed with a collar; the loose-joint nut 500 is sleeved with a convex ring of the detachable nut 400, the loose-joint nut 500 is in running fit with the convex ring of the detachable nut 400, the convex ring of the loose-joint nut 500 is sleeved with the detachable nut 400, and the convex ring of the loose-joint nut 500 is in running fit with the detachable nut 400; the collar of the union nut 500 rotationally engages the collar of the removable nut 400.

Through adopting above-mentioned technical scheme, when being connected loose-joint elbow and the inlet tube of water heater, carry out threaded connection with loose-joint nut 500 and the inlet tube of water heater, can realize the simple and convenient quick stable assembly of loose-joint elbow and water heater inlet tube.

Referring to fig. 2, in an embodiment of the present utility model, an exemplary portion of the removable nut 400, which is used to connect with the elbow body 100, is sleeved with a third sealing ring 410, the third sealing ring 410 is located inside the elbow body 100, and the removable nut 400 and the elbow body 100 tightly press the third sealing ring 410 together.

By adopting the above technical solution, the third sealing ring 410 can increase the sealing performance of the joint between the detachable nut 400 and the elbow body 100, so that the slipknot elbow can stably convey water flow in the daily long-time use process, and high tightness is maintained, and leakage is avoided.

In summary, in the actual use process, the loose joint elbow provided by the utility model can be used for perfect installation of a daily waterway; the manufacturing and mounting cost is low, the size is small, and the problem that nuts are easy to clamp can be solved; the design and molding process is simple and practical, and the labor cost is reduced.

Tap water enters the elbow body 100 from the water inlet 110 of the elbow body 100, the tap water is filtered through the filter screen 300, and the filtered tap water enters the water inlet pipe of the water heater through the water outlet 120 of the elbow body 100 for water supply; the loose joint elbow provided by the technical scheme of the utility model has a filtering function, and the problems that impurities are not easy to accumulate at the loose joint elbow and the pipeline is not easy to be blocked after long-time use are solved.

When the filter screen 300 filters more accumulated impurities and needs to be cleaned, the detachable bolt 200 is detached to clean the filter screen 300, and after the filter screen 300 is cleaned, the detachable bolt 200 with the filter screen 300 is assembled and connected with the elbow body 100, so that the efficient, simple and convenient cleaning of the filter screen 300 is realized.

While the present utility model has been described with reference to the preferred embodiments shown in the drawings, it will be readily understood by those skilled in the art that the scope of the utility model is not limited to those specific embodiments, and the above examples are only for illustrating the technical solution of the utility model, not for limiting it; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosed technology. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims (10)

1. A loose-joint elbow with water filtering function, comprising:

the elbow body with a water inlet and a water outlet is characterized in that,

the middle part of elbow body can be dismantled and be connected with removable bolt, part of removable bolt is located inside the elbow body, be located inside the elbow body the end connection of removable bolt has the filter screen of tube-shape, the filter screen is located inside the elbow body.

2. The loose-end elbow with water filtering function according to claim 1, wherein the sidewall of the filter screen with the filtering holes is directed toward the inner passage of the elbow body.

3. The loose-joint elbow with a water filtering function according to claim 1, wherein a clamping portion is arranged at the end portion of the detachable bolt located inside the elbow body, and the detachable bolt is detachably connected with the filter screen through the clamping portion.

4. A loose-joint elbow with a water filtering function according to any one of claims 1-3, wherein the filter screen is a filter screen manufactured by stainless steel raw materials.

5. A loose-joint elbow with a water filtering function according to any one of claims 1-3, wherein the filter screen is a filter screen manufactured by using rubber raw materials.

6. A loose-joint elbow with a water filtering function according to any one of claims 1-3, wherein a plurality of protruding stripes are arranged on the circumferential side surface of the detachable bolt, and a screwing groove is formed on the end surface of the detachable bolt, which faces away from the elbow body.

7. A loose-joint elbow with a water filtering function according to any one of claims 1-3, wherein a main sealing ring is sleeved at a part of the detachable bolt, which is used for being connected with the elbow body, the main sealing ring is positioned inside the elbow body, and the detachable bolt and the elbow body tightly squeeze the main sealing ring together.

8. A loose-joint elbow with a water filtering function according to any one of claims 1-3, wherein a secondary sealing ring is sleeved at a part of the detachable bolt, which is used for being connected with the elbow body, the secondary sealing ring is positioned inside the elbow body, and the detachable bolt and the elbow body tightly squeeze the secondary sealing ring together.

9. The loose-joint elbow with the water filtering function according to claim 1, wherein the water outlet of the elbow body is in threaded connection with an annular detachable nut, the end part of the detachable nut, which is away from the elbow body, is rotationally connected with the annular loose-joint nut, and the circumferential side wall of the loose-joint nut is provided with threads for being connected with a pipeline.

10. The loose-joint elbow with the water filtering function according to claim 9, wherein a third sealing ring is sleeved at a part of the detachable nut, which is used for being connected with the elbow body, the third sealing ring is positioned inside the elbow body, and the detachable nut and the elbow body tightly squeeze the third sealing ring together.