A pipe joint for protecting a connection

Abstract

The application relates to the technical field of pipeline connection, in particular to a pipe joint for protecting a connection, which comprises a joint and a protective sleeve; one end of the joint is provided with a connecting piece, a base is fixed to one end of the joint close to the connecting piece, the protective sleeve is detachably connected with the base, and the shortest distance between the inner diameter of the protective sleeve and the outer diameter of the joint is equal to or greater than the pipe wall thickness of a connected pipeline. The application has the effect of improving the wear resistance of the connection between the pipeline and the connecting piece.

Description

Technical Field

[0001] This application relates to the field of pipe connection technology, and in particular to a pipe fitting for protecting the connection point. Background Technology

[0002] PEX pipes, also known as cross-linked polyethylene pipes, are widely used in building water supply and drainage, HVAC, and other fields due to their advantages such as high temperature resistance, corrosion resistance, and good flexibility. With the increasing prevalence of PEX pipes, higher requirements are being placed on the reliability and ease of installation of their connectors.

[0003] In existing technologies, pipe connections are typically made using an insertion method where the outer diameter of the connector fits snugly against the inner diameter of the pipe, leaving the connection point exposed. Because the connector and pipe are often interference fits, the tension at the connection point is greater, and the pipe itself is weaker. When the pipe is used outdoors or experiences friction with its surroundings, the connection point is more prone to wear than other areas, leading to pipe breakage and connection failure.

[0004] Therefore, how to improve the wear resistance of the connection between pipes and fittings has become an urgent problem to be solved in this field. Utility Model Content

[0005] To improve the wear resistance of the connection between the pipe and the fitting, this application provides a pipe fitting that protects the connection.

[0006] The technical solution for a pipe fitting that protects the connection point provided in this application is as follows: A pipe fitting for protecting a connection includes a connector and a protective sleeve; one end of the connector is provided with a connector, and the end of the connector near the connector is fixed with a base; the protective sleeve is detachably connected to the base, and the shortest distance between the inner diameter of the protective sleeve and the outer diameter of the connector is equal to or greater than the wall thickness of the pipe to be connected.

[0007] By adopting the above technical solution, the connector links multiple joints together. A base is set at one end of each joint near the connector, and the base is connected to a protective sleeve. The protective sleeve protects the joints, preventing the connection between the joint and the pipe from being constantly exposed, which could lead to pipe damage or breakage. The protective sleeve, placed at the connection between the joint and the pipe, partially surrounds both, improving the wear resistance of the connection.

[0008] Preferably, the end of the connector away from the connector is provided with a plurality of annular protrusions, and the plurality of annular protrusions are fixed on the connector at equal intervals.

[0009] By adopting the above technical solution, multiple annular protrusions are provided on the joint. The multiple annular protrusions are set at equal intervals to provide multi-level friction, and at the same time, the contact pressure can be dispersed, resulting in higher locking performance.

[0010] Preferably, the connector is further fixed with an interference protrusion, which is disposed at the end of the connector near the connector, and the outer diameter of the interference protrusion at the end near the connector is larger than the outer diameter of the annular protrusion.

[0011] By adopting the above technical solution, the last protrusion connecting the pipe and the joint is set as an interference protrusion. The outer diameter of the interference protrusion near the connector is larger than the outer diameter of the annular protrusion. When the pipe is installed, the interference protrusion and the pipe are in an interference fit. The interference protrusion tightens the pipe, which enhances the locking effect between the joint and the pipe during connection and can also increase the friction between the joint and the pipe.

[0012] Preferably, a limiting protrusion is also fixed on the connector, the limiting protrusion is fixed between the connector and the interference protrusion, and the outer diameter of the limiting protrusion is larger than the outer diameter of the interference protrusion.

[0013] By adopting the above technical solution, the limiting protrusion restricts the insertion depth of the pipe. When the pipe is inserted to a sufficient depth, it will abut against the limiting protrusion. At the same time, the outer diameter of the limiting protrusion is set to be larger than the outer diameter of the interference protrusion, so that the pipe abuts against the limiting protrusion after being inserted to a sufficient depth, thus preventing the problem that the limiting protrusion is too small and cannot complete the abutment action.

[0014] Preferably, the protective sleeve is threadedly connected to the base, and the end face of the protective sleeve away from the base is flush with the end face of the connector, or the height of the end face of the protective sleeve away from the base exceeds the end face of the connector.

[0015] By adopting the above technical solution, the outer surface of the protective sleeve is connected to the inner surface of the base. The base connects both the protective sleeve and the connector. The protective sleeve is placed outside the connector and provides protection when the connector is connected to the pipe. The base and the protective sleeve are connected by threads, making it easy to disassemble the protective sleeve and connect the pipe and connector. The end face of the protective sleeve is flush with the end face of the connector, so that the protective sleeve protects the entire connection. If the height of the end face of the protective sleeve away from the base exceeds the end face of the connector, the protection zone of the protective sleeve is extended, further protecting the pipe.

[0016] Preferably, the protective sleeve has a through hole near the base, and there are multiple through holes evenly arranged around the protective sleeve.

[0017] By adopting the above technical solution, multiple through holes are set around the protective sleeve. The depth of the pipe sleeve on the joint can be observed through the through holes to ensure that the pipe is installed in place and that the pipe abuts against the limiting protrusion. Multiple through holes ensure that the connection between the pipe and the joint can be observed from any angle without deliberately rotating the pipe.

[0018] Preferably, the end of the connector away from the base is provided with a chamfer or rounded corner.

[0019] By adopting the above technical solution, one end of the connector is set to a rounded or chamfered corner, making it smoother when the round pipe is fitted into the connector; at the same time, the rounded or chamfered design reduces the sharpness of the connector and prevents the connector from scratching the pipe.

[0020] Preferably, the end of the protective sleeve away from the base is provided with a rounded corner or chamfer.

[0021] By adopting the above technical solution, the end of the protective sleeve away from the base is also set to a rounded or chamfered corner, which reduces the sharpness of the protective sleeve and prevents the outside of the pipe from being scratched by the protective sleeve when it is inserted into the joint; at the same time, it increases safety and prevents operators from being scratched by the protective sleeve when installing pipes.

[0022] Preferably, the sidewall of the annular protrusion is provided with friction strips to increase friction.

[0023] By adopting the above technical solution, friction strips are set on the side wall of the annular protrusion to further increase the friction between the joint and the pipe, and prevent the pipe from falling off after being fitted into the joint.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Install a protective sleeve on the outside of the joint to partially surround the connection between the joint and the pipe, protect the connection between the joint and the pipe, improve the wear resistance of the connection between the pipe and the joint, and reduce the possibility of wear or damage to the pipe at the connection between the joint and the joint. 2. Make multiple through holes around the end of the protective sleeve near the base. Use the through holes to observe the depth of the pipe sleeve on the joint to ensure that the pipe is installed in place. Multiple through holes ensure that it can be seen from all angles without deliberately rotating the pipe. 3. Set the last protrusion connecting the pipe and the fitting as an interference fit protrusion to increase the friction between the fitting and the pipe and enhance the locking effect between the fitting and the pipe. Attached Figure Description

[0025] Figure 1 This is a perspective view of a pipe fitting for protecting the connection point according to this application. Figure 2 This is a perspective view of a pipe fitting for protecting the connection point of the present application when two joints are connected; Figure 3This is a perspective view of a pipe fitting for protecting the connection point of the present application, in which two joints are connected by a connector without a protective sleeve; Figure 4 This is a front view of a pipe fitting for protecting the connection point according to this application; Figure 5 This is a cross-sectional view along AA of a pipe fitting for protecting the connection point according to this application; Figure 6 This is a perspective view of a pipe fitting for protecting a connection point, in which the base is installed onto the connector. Figure 7 This is a perspective view of a protective sleeve in a pipe fitting for protecting a connection point, as described in this application.

[0026] Explanation of reference numerals in the attached figures: 1. Connector; 2. Connecting parts; 3. Base; 301. Mounting slot; 4. Protective sleeve; 401, through hole; 5. Limiting protrusion; 6. Annular protrusion; 7. Excessive interference; 8. Friction strip. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0028] This application discloses a pipe fitting for protecting the connection point.

[0029] Example 1 Reference Figure 1 A pipe fitting for protecting the connection includes a connector 1, a connector 2, a base 3, and a protective sleeve 4. The connector 1 includes at least one connector 1. One end of the connector 1 is provided with a connector 2. The end of the connector 1 near the connector 2 is fixed with a base 3. The protective sleeve 4 is connected to the base 3, and the length of the protective sleeve 4 is equal to or greater than the length of the connector 1.

[0030] Reference Figure 2 In this embodiment, there are two connectors 1, and the two connectors 1 are threadedly connected to the connector 2. A sealing gasket can be provided between the two connectors 1 to increase the sealing of the connection. Teflon tape or other thread sealing material can be added between the connector 2 and the two connectors 1 to seal the connection.

[0031] Reference Figure 3The connector 1 has a limiting protrusion 5, an annular protrusion 6, and an interference fit protrusion 7 fixed on it. The limiting protrusion 5 is fixed to the end of the connector 1 near the connector 2. There are multiple annular protrusions 6, which are evenly fixed on the connector 1. The interference fit protrusion 7 is fixed between the annular protrusion 6 and the limiting protrusion 5. The outer diameter of the limiting protrusion 5 is larger than the inner diameter of the pipe to be connected, the outer diameter of the annular protrusion 6 is equal to the inner diameter of the pipe to be connected, and the outer diameter of the interference fit protrusion 7 near the limiting protrusion 5 is larger than the inner diameter of the pipe to be connected.

[0032] In this embodiment, there is only one limiting protrusion 5 and one interference protrusion 7, and there are three annular protrusions 6. The three annular protrusions 6 are equally spaced at the end of the joint 1 away from the connector 2. The outer diameter of the interference protrusion 7 near the connector 2 is larger than the inner diameter of the pipe to be connected, so that the joint 1 and the pipe can form an interference fit and tighten the pipe.

[0033] Reference Figure 3 The annular protrusion 6 is provided with a friction strip 8, which is located on the outer side of the annular protrusion 6, i.e., the surface of the annular protrusion 6 that contacts the pipe being connected. The friction strip 8 increases the friction between the annular protrusion 6 and the pipe. In this embodiment, the friction strip 8 is a rubber pad, or it can be a texture engraved on the annular protrusion 6, or other settings that can increase the friction.

[0034] Reference Figure 4 The protective sleeve 4 has multiple through holes 401 at one end near the base 3. These through holes 401 are used to observe the insertion depth of the pipe during installation. The pipe does not need to be rotated; observation can be made directly through the multiple through holes 401 around the protective sleeve 4, which is more convenient.

[0035] Reference Figure 4 As can be seen from the main view, the interference protrusion 7 can be directly observed through the through hole 401. During installation, the pipe insertion depth can be directly seen. The limiting protrusion 5 is fixed between the interference protrusion 7 and the connector 2. By tilting the pipe connector to different angles, the contact between the pipe and the limiting protrusion 5 can be seen, and the pipe insertion depth can be determined.

[0036] Reference Figure 5 As can be seen, there are two connectors 1, which are connected by the connector 2. A sealing gasket (not shown in the figure) is provided between the two connectors 1. The connectors 1 and the connector 2 are connected by threads. There is PTFE tape (not shown in the figure) between the connectors 1 and the connector 2. The inner diameters of the two connectors 1 are equal and their axes coincide.

[0037] Depend on Figure 5 It can be seen that the connector 1 has multiple protrusions. The protrusion 5 that is fixed to the connector 2 is a limiting protrusion. The outer diameters of the two ends of the limiting protrusion 5 are different. The outer diameter of the limiting protrusion 5 near the connector 2 is larger, which is used to limit the position of the base 3. When the base 3 is fixed to the connector 1 later, the outer diameter of the limiting protrusion 5 near the connector 2 is larger, which limits the fixing of the base 3 and prevents the improper installation position of the base 3 from affecting the pipe fitting. The outer diameter of the limiting protrusion 5 away from the connector 2 is larger than the inner diameter of the pipe to be connected. It is also possible that the outer diameter of the limiting protrusion 5 away from the connector 2 is larger than the outer diameter of the pipe to be connected. The outer diameter of the limiting protrusion 5 away from the connector 2 should be larger than the maximum acceptable interference fit diameter of the pipe to be connected, to prevent the pipe from being over-fitted, causing material waste or even causing the pipe to break due to excessive stress caused by the two interference fits.

[0038] Reference Figure 5 The connector 1 has an interference fit 7 fixed at one end near the limiting protrusion 5. The outer diameters of the two ends of the interference fit 7 are not the same, which facilitates the insertion of the pipe. The outer diameter of the end of the interference fit 7 near the limiting protrusion 5 is larger, and this outer diameter is greater than the inner diameter of the pipe to be connected. The outer diameter of the other end of the interference fit 7 is relatively smaller, and this outer diameter is equal to or greater than the inner diameter of the pipe to be connected. The outer diameter of the end of the interference fit 7 near the limiting protrusion 5 is greater than the outer diameter of the other end of the interference fit 7.

[0039] In this embodiment, the cross-section of the interference fit 7 is a right trapezoid, wherein the right-angle waist is fixed to the connector 1, the sloping waist faces the protective sleeve, and the shorter outer diameter serves as the upper base, which is the first of the interference fit 7 to contact the fitted pipe.

[0040] Reference Figure 5 The end of the connector 1 away from the connector 2 is provided with a plurality of annular protrusions 6. In this embodiment, there are three annular protrusions 6, which are equally spaced. The annular protrusion 6 near the end of the connector 1 is provided with a chamfer between it and the end face of the connector 1. The chamfer connects the end face of the connector 1 with the annular protrusion 6 at the end, forming a sloping boss, which makes it easier for the pipe to be connected to be fitted into the connector 1.

[0041] Reference Figure 5 The inner diameter of the connector 1, away from the connector 2, is chamfered. The chamfered inner diameter helps the liquid in the pipe to pass smoothly through the connector and flow into the next pipe.

[0042] Reference Figure 6The base 3 is fixed on the connector 1. The base 3 has a protrusion on its periphery, and the protrusion and the connector 1 form an installation groove 301. The protective sleeve 4 is installed in the installation groove 301. The inner surface of the base 3 is provided with threads, and the inner diameter of the base 3 matches the outer diameter of the protective sleeve 4.

[0043] Reference Figure 7 The protective sleeve 4 has a through hole 401 at one end. There are multiple through holes 401. In this embodiment, there are four through holes 401 (only three are shown in the attached figure due to the viewing angle). The four through holes 401 are evenly arranged on the side of the protective sleeve 4. The outer surface of the protective sleeve 4 near the through hole 401 is provided with threads and is connected to the base 3.

[0044] The shortest distance between the inner diameter of the protective sleeve 4 and the annular protrusion 6 is equal to or greater than the wall thickness of the pipe to be connected, so that the pipe to be connected can be smoothly fitted in.

[0045] Reference Figure 5 The end face of the protective sleeve 4 away from the base 3 is flush with the end face of the connector 1. In other embodiments of this application, the height of the end face of the protective sleeve 4 away from the base 3 exceeds the end face of the connector 1. Both the inner and outer surfaces of the end face of the protective sleeve 4 away from the base 3 are chamfered to reduce sharpness, preventing scratches on the pipe when it is fitted, and also preventing injury from sharp corners on the outer surface.

[0046] Reference Figure 1 Each connector 1 is provided with a connector 2, a base 3 and a protective sleeve 4. The connector 2 and the connector 1 are connected by a thread. When it is necessary to add connectors 1 for connection, the connector 2 can be used to connect two connectors 1 together. If the number of connectors 1 to be connected is three, the connector 2 needs to be replaced with a T-connector.

[0047] In this embodiment, the threaded connection between the base 3 and the protective sleeve 4 is as follows: the inner surface of the base 3 is connected to the outer surface of the protective sleeve 4, and threads are provided on both the inner surface of the base 3 and the outer surface of the protective sleeve 4. In other embodiments of this application, the outer surface of the base 3 can be connected to the inner surface of the protective sleeve 4, and the length of the protective sleeve 4 can be extended to also protect the connector 2.

[0048] In other embodiments of this application, the length of the protective sleeve 4 can be doubled. When using two connectors 1 for connection, an extended protective sleeve 4 can be used to protect both connectors 1 and connectors 2. The threads on the outer surfaces of the two bases 3 need to be replaced with continuous threads so that the protective sleeve 4 can be completely unscrewed from a single base 3, making installation more convenient. However, the protective sleeve 4 is blind-tightened when installed on the base 3.

[0049] In this embodiment, all chamfers can be replaced with rounded corners. Choosing between chamfers or rounded corners according to actual needs is a skill possessed by those skilled in the art.

[0050] This embodiment demonstrates the connection of two connectors 1 together. In other embodiments of this application, the number of connectors can be increased arbitrarily, and the connectors can be connected to matching connectors. For example, if three connectors 1 are used, a tee connector with threads and an inner diameter matching the outer diameter of the connector 1 can be selected. The three connectors 1 can be installed into the connection ports of the tee connectors respectively, and then the pipes can be connected to the connectors 1 respectively.

[0051] In this embodiment, the connector 1 and the limiting protrusion 5, the annular protrusion 6 and the interference protrusion 7 fixed on the connector 1 are integrally formed. Alternatively, the limiting protrusion 5, the annular protrusion 6 and the interference protrusion 7 can be fixed on the connector 1 by welding, gluing or other methods.

[0052] In this embodiment, the base 3 and the connector 1 can be integrally formed, or the base 3 can be fixed to the connector 1 by welding, gluing or other methods.

[0053] In this embodiment, the protective sleeve 4 is threadedly connected to the base 3. When connecting the pipe, the protective sleeve 4 can be removed and placed on the pipe to be connected. After fixing the pipe to the connector 1, the protective sleeve 4 can be connected to the base 3. Alternatively, the pipe to be connected can be installed directly without removing the protective sleeve 4. The pipe installation can be observed through the through hole 401, which is more convenient and simple.

[0054] The implementation principle of a pipe fitting for protecting the connection point in this application embodiment is as follows: When connecting pipes, determine the number of pipes to be connected and the connection relationship, select a suitable connector 2, connect the joint 1 to the connector 2 according to the connection relationship, remove the protective sleeve 4 that is threaded to the base 3, and put the protective sleeve on the pipe to be connected according to the installation direction. Put the pipe on the joint 1, and put the pipe into the annular protrusion 6 and the interference protrusion 7 in sequence. The end face of the pipe abuts against the upper surface of the limiting protrusion 5. When putting it on, you can freely choose to use PTFE tape. After the pipe is put on, connect the protective sleeve 4 to the base 3 to form a protective zone. Alternatively, the step of removing the protective sleeve 4 can be omitted, and the pipe can be directly put into the joint. It is not necessary to install the protective sleeve 4 on the base 3.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe fitting for protecting the connection point, characterized in that: It includes a connector (1) and a protective sleeve (4); one end of the connector (1) is provided with a connector (2), and the end of the connector (1) near the connector (2) is fixed with a base (3). The protective sleeve (4) is detachably connected to the base (3). The shortest distance between the inner diameter of the protective sleeve (4) and the outer diameter of the connector (1) is equal to or greater than the wall thickness of the pipe to be connected.

2. The pipe fitting for protecting the connection point according to claim 1, characterized in that: The connector (1) has a plurality of annular protrusions (6) at one end away from the connector (2), and the plurality of annular protrusions (6) are fixed on the connector (1) at equal intervals.

3. A pipe fitting for protecting the connection point according to claim 2, characterized in that: An interference protrusion (7) is also fixed on the connector (1). The interference protrusion (7) is located at one end of the connector (1) near the connector (2). The outer diameter of the interference protrusion (7) near the connector (2) is larger than the outer diameter of the annular protrusion (6).

4. A pipe fitting for protecting the connection point according to claim 3, characterized in that: The connector (1) is also fixed with a limiting protrusion (5), which is fixed between the connector (2) and the interference protrusion (7). The outer diameter of the limiting protrusion (5) is larger than the outer diameter of the interference protrusion (7).

5. A pipe fitting for protecting the connection point according to claim 1, characterized in that: The protective sleeve (4) is threadedly connected to the base (3). The end face of the protective sleeve (4) away from the base (3) is flush with the end face of the connector (1), or the height of the end face of the protective sleeve (4) away from the base (3) exceeds the end face of the connector (1).

6. A pipe fitting for protecting the connection point according to claim 1, characterized in that: The protective sleeve (4) has a through hole (401) near the base (3). There are multiple through holes (401), and the multiple through holes (401) are evenly arranged around the protective sleeve (4).

7. A pipe fitting for protecting the connection point according to claim 3, characterized in that: The end of the connector (1) away from the base (3) is provided with a chamfer or rounded corner.

8. A pipe fitting for protecting the connection point according to claim 1, characterized in that: The protective sleeve (4) has a rounded or chamfered corner at the end away from the base (3).

9. A pipe fitting for protecting the connection point according to claim 3, characterized in that: The sidewall of the annular protrusion (6) is provided with friction strips (8) to increase friction.

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