Reducing joint assembly

Abstract

The utility model discloses a reducing joint assembly, which is used for connecting a connecting pipe to a threaded joint of a valve in an extruding manner, and comprises a driving nut, a connecting pipe and a connecting pipe, the reducing joint comprises a first clamping sleeve and a second clamping sleeve, the head part of the first clamping sleeve and the tail part of the second clamping sleeve are connected into a whole, the head part of the first clamping sleeve is provided with a first conical surface, and the tail part of the second clamping sleeve is provided with a stepped hole for receiving the first conical surface; and the joint of the first clamping sleeve and the second clamping sleeve is broken under the axial extrusion force applied by the driving nut, so that the first conical surface is retracted into the stepped hole. According to the reducing joint assembly, the first clamping sleeve is driven by axial extrusion force generated when the driving nut is screwed to move towards the second clamping sleeve, so that the joint of the first clamping sleeve and the second clamping sleeve is broken, the first conical surface is retracted into the stepped hole to complete pipe extrusion connection, the assembly process is simplified, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, and more specifically to a reducing joint assembly. Background Art

[0002] Normally, the inlet and outlet pipes of the same valve have the same diameter. However, in different installation scenarios, there are requirements for connecting pipes with different diameters and standard specifications.

[0003] The Chinese invention patent CN1987187A discloses a single-and-double-hoop co-integrated extrusion connection pipe connector, or more specifically, a single-and-double-hoop co-integrated extrusion connection pipe connector, which is composed of a connector, an extrusion hoop and a drive nut. If a single-hoop type extrusion hoop is installed, it is a single-hoop type, and if a double-hoop type extrusion hoop is installed, it is a double-hoop type. For a single-type pipe connector, a sealing cantilever of the hoop head wedge is used to provide a squeeze-flat sealing connection, and then a squeeze-concave fastening connection is provided through the inner edge of the hoop. The hoop tail wedge provides a "stop feeling" for installation and tightening operation, and the automatic radial outward movement of the middle part shields the over-drive movement of the hoop tail, so that the "stop feeling" of the installation and tightening operation is clear and resistant to over-drive.

[0004] However, in the above patent solution, the connector and the extrusion hoop need to be loaded step by step, which affects the assembly efficiency. In addition, during assembly, the front end of the extrusion hoop is relatively soft, which causes the front end of the extrusion hoop to be unable to align with the rear end of the connector. For this reason, this application is specially proposed. Summary of the invention

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model proposes a reducing joint assembly.

[0006] The technical solution adopted by the utility model is to provide a reducing joint assembly, which is used to squeeze and connect the connecting pipe at the threaded joint of the valve, including:

[0007] A drive nut, which is used for threaded connection with the threaded joint;

[0008] A reducing joint, the reducing joint comprising a first ferrule and a second ferrule, the head of the first ferrule and the tail of the second ferrule are connected as a whole, the head of the first ferrule is provided with a first conical surface, and the tail of the second ferrule has a stepped hole for receiving the first conical surface;

[0009] The joint between the first ferrule and the second ferrule is broken by the axial extrusion force applied by the driving nut, so that the first conical surface is retracted into the stepped hole.

[0010] After adopting the above structure, the first ferrule is equivalent to the extrusion hoop, and the second ferrule is equivalent to the connector. By integrating the first ferrule and the second ferrule together to form a reducer, it is only necessary to assemble the reducer and the drive nut on the connecting pipe during assembly. The axial extrusion force generated when the drive nut is tightened is used to drive the first ferrule to move toward the second ferrule, so that the joint between the two is broken, so that the first cone surface is retracted into the stepped hole to complete the tube extrusion connection. This design simplifies the assembly process, improves assembly efficiency, and ensures the firmness of the connection.

[0011] According to an embodiment of the utility model, a step surface is provided on the outer periphery of the first ferrule; the end surface of the step surface abuts against the rear end surface of the second ferrule, playing a role of limiting the first conical surface.

[0012] According to an embodiment of the utility model, a conical guide surface is provided at the tail of the first ferrule, and the drive nut has an abutment portion adapted to the guide surface; the setting of the guide surface and the abutment portion enables the force applied by the drive nut to the first ferrule to be divided into forces in two directions, one is the axial driving force of the first ferrule, and the other is the radial extrusion force of the first ferrule, which breaks the first ferrule to tighten the connecting pipe to achieve sealing.

[0013] According to one embodiment of the utility model, a second conical surface is provided on the outer periphery of the second ferrule, and the maximum outer diameter of the second conical surface is greater than the inner diameter of the threaded joint; the second conical surface is provided to achieve sealing between the outer periphery of the second ferrule and the inner wall of the threaded joint.

[0014] According to an embodiment of the utility model, the right-angle edge of the step surface is provided with an arc chamfer; the setting of the arc chamfer avoids the feeling of cutting at this place.

[0015] According to an embodiment of the utility model, the tail opening of the first ferrule is provided with an opening; the setting of the opening facilitates the alignment of the connecting tube and the insertion into the first ferrule.

[0016] According to an embodiment of the utility model, a limiting portion is provided at the head opening of the second ferrule, and when the connecting tube passes through the first ferrule and is inserted into the second ferrule, the end of the connecting tube abuts against the limiting portion.

[0017] According to an embodiment of the utility model, the maximum inner diameter of the stepped hole is greater than the inner diameter of the second ferrule.

[0018] According to an embodiment of the utility model, the inner diameter of the first ferrule is equal to the inner diameter of the second ferrule. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a three-dimensional diagram of the reducer assembly before assembly in the embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of a reducing joint assembly in an embodiment of the utility model;

[0022] Figure 3 It is a stereoscopic diagram of a reducer in an embodiment of the utility model;

[0023] Figure 4 It is a cross-sectional view of a reducer in an embodiment of the utility model;

[0024] Figure 5 It is a sectional stereoscopic view of a reducer in an embodiment of the utility model;

[0025] Figure 6 It is a partial enlarged view of the cross section of the reducer in the embodiment of the utility model;

[0026] Figure 7 It is a stereoscopic diagram of the assembled reducer assembly in the embodiment of the utility model;

[0027] Figure 8 It is a partial enlarged view of the reducer assembly after assembly in the embodiment of the utility model;

[0028] Fig. 9 It is a cross-sectional view of the reducer after explosion in the embodiment of the utility model.

[0029] Description of the numbers in the figure:

[0030] 1. Valve; 2. Drive nut; 3. Connecting pipe; 4. Reducing joint;

[0031] 11. Valve body; 12. Valve core; 13. Valve stem; 14. Handle; 15. Valve seat;

[0032] 11a, threaded joint;

[0033] 21. Contact part;

[0034] 41. first card sleeve; 42. second card sleeve;

[0035] 41a, step surface; 41b, guide surface; 41c, arc chamfer; 41d, first tapered surface;

[0036] 42a, stepped hole; 42b, second tapered surface; 42c, limiting portion. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Example

[0038] like Figure 1-9 As shown, in this embodiment, a reducing joint 4 assembly is disclosed, which is used to squeeze and connect the connecting pipe 3 to the threaded joint 11a of the valve 1, and includes:

[0039] A driving nut 2, which is used for threaded connection with the threaded joint 11a;

[0040] The reducer 4 includes a first ferrule 41 and a second ferrule 42. The head of the first ferrule 41 is connected to the tail of the second ferrule 42 as a whole. The head of the first ferrule 41 is provided with a first conical surface 41d, and the tail of the second ferrule 42 is provided with a stepped hole 42a for receiving the first conical surface 41d.

[0041] The joint between the first ferrule 41 and the second ferrule 42 is broken by the axial extrusion force applied by the drive nut 2, so that the first conical surface 41d is retracted into the stepped hole 42a.

[0042] Furthermore, combined with Figure 1 and Figure 2 As shown, in this embodiment, the valve 1 adopts a ball valve structure, and the valve 1 includes a valve body 11, a valve core 12 installed in the valve body 11, a valve seat 15 installed between the valve body 11 and the valve core 12, a valve stem 13 fixedly connected to the valve core 12, and a handle 14 connected to the valve stem 13. The water inlet interface and the water outlet interface of the valve body 11 are both threaded joints 11a. In this embodiment, the inner diameters of the water inlet threaded joint 11a and the water outlet threaded joint 11a are the same. In other embodiments, the inner diameters of the water inlet threaded joint 11a and the water outlet threaded joint 11a are different.

[0043] Furthermore, the drive nut 2 has an internal thread that matches the external thread of the threaded joint 11a, and the threaded joint 11a has an internal step that matches the outer periphery of the front end of the second ferrule 42. The rear end of the drive nut 2 has an inner shoulder that protrudes inward, and the inner diameter of the inner shoulder is smaller than the minimum inner diameter of the internal thread of the drive nut 2. An abutment portion 21 in the shape of a conical inner hole is provided on the inner shoulder, and a conical guide surface 41b is provided at the tail of the first ferrule 41, and the abutment portion 21 is adapted to the guide surface 41b. The setting of the guide surface 41b and the abutment portion 21 allows the force applied by the drive nut 2 to the first ferrule 41 to be divided into two directions of force, one is the axial driving force of the first ferrule 41, and the other is the radial extrusion force of the first ferrule 41, breaking the first ferrule 41 to tighten the connecting pipe 3 to achieve sealing.

[0044] Specifically, combined Figure 3-7 As shown, the outer periphery of the first ferrule 41 is provided with a step surface 41a; the end surface of the step surface 41a abuts against the rear end surface of the second ferrule 42, playing a role in limiting the first conical surface 41d. The outer periphery of the second ferrule 42 is provided with a second conical surface 42b, and the maximum outer diameter of the second conical surface 42b is greater than the inner diameter of the threaded joint 11a, the right-angle edge of the step surface 41a is provided with an arc chamfer 41c, and the tail opening of the first ferrule 41 is provided with an open opening; the open opening is convenient for the connection pipe 3 to be aligned and inserted into the first ferrule 41, and the head opening of the second ferrule 42 is provided with a limiting portion 42c, and when the connection pipe 3 passes through the first ferrule 41 and is inserted into the second ferrule 42, the end of the connection pipe 3 abuts against the limiting portion 42c.

[0045] Furthermore, combined with Figure 8-9 As shown, the maximum inner diameter of the stepped hole 42a is greater than the inner diameter of the second ferrule 42. The inner diameter of the first ferrule 41 is equal to the inner diameter of the second ferrule 42.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A reducing joint assembly, which is used to squeeze and connect a connecting pipe to a threaded joint of a valve, characterized in that: include: A drive nut, which is used for threaded connection with the threaded joint; A reducing joint, the reducing joint comprising a first ferrule and a second ferrule, the head of the first ferrule and the tail of the second ferrule are connected as a whole, the head of the first ferrule is provided with a first conical surface, and the tail of the second ferrule has a stepped hole for receiving the first conical surface; The joint between the first ferrule and the second ferrule is broken by the axial extrusion force applied by the driving nut, so that the first conical surface is retracted into the stepped hole.

2. A reducing joint assembly according to claim 1, characterized in that: The outer periphery of the first ferrule is provided with a step surface.

3. A reducing joint assembly according to claim 1, characterized in that: The tail of the first ferrule is provided with a conical guide surface, and the drive nut has an abutment portion adapted to the guide surface.

4. A reducing joint assembly according to claim 1, characterized in that: A second conical surface is provided on the outer periphery of the second ferrule, and the maximum outer diameter of the second conical surface is greater than the inner diameter of the threaded joint.

5. A reducing joint assembly according to claim 2, characterized in that: The right-angle edge of the step surface is provided with an arc chamfer.

6. A reducing joint assembly according to claim 1, characterized in that: The tail opening of the first ferrule is provided with an open opening.

7. A reducing joint assembly according to claim 1, characterized in that: A limiting portion is provided at the head opening of the second ferrule. When the connecting tube passes through the first ferrule and is inserted into the second ferrule, the end of the connecting tube abuts against the limiting portion.

8. The reducer assembly according to claim 1, characterized in that: The maximum inner diameter of the stepped hole is greater than the inner diameter of the second ferrule.

9. A reducing joint assembly according to claim 8, characterized in that: The inner diameter of the first ferrule is equal to the inner diameter of the second ferrule.

Images