A steel ring

Abstract

A steel ring includes a locking member, which protrudes from the inner surface of the ring body (11). The locking member includes locking teeth, which are in the shape of thin flakes and include a fixing portion and a contact portion. A first locking tooth group (111) is composed of several locking teeth. For the locking teeth in the first locking tooth group (111), the distance between the fixing portions is less than the distance between the contact portions. Several locking teeth form a second locking tooth group (112). For the locking teeth in the second locking tooth group (112), the distance between the fixing portions is greater than the distance between the contact portions. This structure can generate a greater locking force, ensure the tight connection of the clamped connection pipeline, prevent it from being easily disengaged, and is beneficial to processing and reduces the wear of the mold.

Description

Technical Field

[0001] The present invention relates to the field of pipe fittings connection, and particularly to a steel ring for connecting press-fit pipe fittings. Background Art

[0002] In fields such as fire protection, gas supply, and heating, the connection of pipes is a common requirement. Compared with traditional connection methods such as welding and threading, the press-fit connection method has become a common connection method in this field due to its various advantages.

[0003] In the press-fit connection method, a thicker pipe (referred to as a pipe fitting in this application) is sleeved on a thinner pipe (referred to as a pipe material in this application), and fixing parts and sealing parts are provided. Then, an external force is used to compress and deform the pipe material so that the pipe fitting and the pipe material are fixedly connected and sealed without leakage.

[0004] Compared with traditional connection technologies, the press-fit method of connecting pipes has many advantages. First, the construction difficulty is greatly reduced. Welding connection requires professional welders and has high requirements for site equipment, and the construction efficiency is also very low. While press-fitting is carried out by special equipment for cold pressing, and the workers operating the cold pressing equipment can take up their posts after undergoing simple training. Compared with welding, the construction difficulty is reduced and the efficiency is improved. Second, usually in most construction sites, it is impossible to achieve argon gas protection for the inner wall of the welding workshop. At a high temperature close to 1000 degrees Celsius during welding, it is easy to cause chromium depletion phenomenon in the material at the welding point. When the pipeline is used for a long time, the corrosion of the material at the welding position by chlorine elements in the water will lead to the problem of pipeline leakage. In addition, due to the operation difficulty at the turning position of the pipeline, it is not easy to form good welding quality in the welding process. While the press-fit connection can avoid the adverse effects brought by welding technology, process conditions, site equipment, etc., ensure the connection quality, and improve the work efficiency.

[0005] In the press-fit connection method, the steel ring is one of the most critical components. The function of the steel ring is to lock the pipe material after the pipe fitting is compressed to prevent it from slipping out of the pipe fitting. This steel ring is usually annular. At the same time, locking components are provided on the steel ring. After the pipe fitting is compressed, the diameter of the steel ring becomes smaller as the inner diameter of the pipe fitting decreases, so as to hold the pipe fitting tightly. The locking components provided on the inner surface of the steel ring can prevent the pipe material from slipping out of the pipe fitting.

[0006] The commonly used fixing components in the prior art cannot generate a large enough locking force, resulting in an unsatisfactory fixing effect. At the same time, the structures of some steel rings are asymmetric, which leads to unilateral force on the stamping die during manufacturing and processing, easily damaging the die, resulting in difficult processing and increased costs.

[0007] Therefore, those skilled in the art are committed to developing a steel ring that can generate a greater locking force and at the same time protect the die, making the service life of the die longer. Summary of the Invention

[0008] In view of the above-mentioned defects of the prior art, the technical problems to be solved by the present invention are how to design a locking mechanism to generate a greater locking force on the steel ring and how to protect the mold for processing.

[0009] To achieve the above object, a person skilled in the art provides a steel ring, including a ring body and a locking mechanism, characterized in that the ring body has an inner surface and an outer surface, and the locking mechanism includes a locking member, and the locking member is disposed on the inner surface of the ring body.

[0010] Further, the locking member protrudes from the inner surface.

[0011] Further, the locking member includes locking teeth, and the locking teeth include a fixing portion and a contact portion. The fixing portion is fixedly disposed on the inner surface, and the contact portion is configured to protrude from the inner surface and incline in the direction of the second axis.

[0012] Further, the contact portion is in the shape of a thin sheet, and the inclination angle of the contact portion is less than 90 degrees, and the inclination angle is the angle between the plane where the contact portion is located and the inner surface.

[0013] Further, the locking member includes a first set of locking teeth, and the first set of locking teeth includes two or more locking teeth with different inclination directions. In the first set of locking teeth, the distance between the fixing portions of each locking tooth and other locking teeth is less than the distance between the contact portions.

[0014] Further, the inclination angles of each locking tooth in the first set of locking teeth are the same.

[0015] Further, the number of locking teeth in the first set of locking teeth is an even number and is arranged axially symmetrically with respect to the first axis.

[0016] Further, in the first set of locking teeth, at least one locking tooth has its fixing portion close to the locking direction and its contact portion close to the disengaging direction.

[0017] Further, it includes two or more sets of the first set of locking teeth.

[0018] Further, the two or more sets of the first set of locking teeth are arranged centrosymmetrically with respect to the second axis.

[0019] Further, the locking member includes a second locking tooth group, the second locking tooth group includes two or more locking teeth with different inclination directions, and in the second locking tooth group, the distance between the fixing portions of each locking tooth and other locking teeth is greater than the distance between the contact portions.

[0020] Further, the inclination angles of each locking tooth in the second locking tooth group are the same.

[0021] Further, the number of locking teeth in the second locking tooth group is an even number and is arranged axially symmetrically with respect to the first axis.

[0022] Further, in the first locking tooth group and the second locking tooth group, at least one locking tooth has its fixing portion close to the locking direction and its contact portion close to the disengaging direction.

[0023] Further, there are two or more sets of the second locking tooth groups.

[0024] Further, the two or more sets of second locking tooth groups are arranged centrosymmetrically with respect to the second axis.

[0025] Further, the axial distance between the locking teeth in the first locking tooth group is greater than the axial distance between the locking teeth in the second locking tooth group, and the axial distance is the distance from the contact portion of the locking tooth to the first axis.

[0026] Further, the steel ring is made by one-time stamping.

[0027] Further, the steel ring includes a first state and a second state. In the first state, the steel ring is in an unclosed ring shape.

[0028] Further, in the second state, the steel ring is in a closed ring shape.

[0029] Further, the first axis is arranged circumferentially on the ring body and divides the ring body into two parts with equal size dimensions.

[0030] Further, the second axis is arranged perpendicular to the plane where the ring body is located and passes through the center of the circle where the ring body is located.

[0031] Further, the first state is the state when the ring body is not compressed.

[0032] Further, the second state is the state after the ring body is compressed.

[0033] Compared with the prior art, the present invention has at least the following technical effects:

[0034] 1. A part of the locking teeth of the present invention is arranged towards the detachment direction, and when the pipe fitting has a tendency to detach, a greater locking force can be generated.

[0035] 2. The locking teeth of the present invention are symmetrically arranged. Therefore, during the stamping process, the two sides of the mold are evenly stressed, which prolongs the service life of the mold, improves processing consistency, and reduces production costs.

[0036] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the drawings to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic illustration of the first axis and the second axis in the present invention;

[0038] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0039] Figure 3 It is a top view of an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the position distribution of the locking components in an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the locking components in an embodiment of the present invention

[0042] Figure 6 It is a schematic diagram of the first state after installation in an embodiment of the present invention;

[0043] Figure 7 It is a schematic diagram of the second state after installation in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The following introduces multiple preferred embodiments of the present invention with reference to the accompanying drawings of the specification to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0045] In the drawings, components with the same structure are denoted by the same reference numerals, and components with similar structures or functions are denoted by similar reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. To make the illustration clearer, the thickness of some components in the drawings is appropriately exaggerated.

[0046] As Figure 1As shown, the ring body of the steel ring mentioned in this application is an annular object. It has a certain width itself. If this invention is unfolded, it is a rectangular sheet-like object. In this application, the first axis a mentioned specifically refers to a center line on the ring body. If this invention is unfolded, the first axis a is a straight line arranged along the length direction of the rectangle, and the first axis a divides the rectangle into two parts with the same shape and area. The second axis b is a straight line perpendicular to the plane where the ring body is located. As an annular object, the second axis b passes through the center of the circle where the ring body is located. As Figure 6 shown, the pipe fitting 1 is sleeved on the outer surface of the pipe 2. Among them, the direction from the pipe 2 to the pipe fitting 1 is called the locking direction; the direction from the pipe fitting 1 to the pipe 2 is called the detachment direction.

[0047] As Figures 2-3 shown in an embodiment of the present invention, it includes a ring body 11. When this embodiment is not installed inside the pipe fitting, the ring body 11 is in an unclosed circular ring shape, that is, the first state. Therefore, the ring body 11 has a notch 113. When this embodiment is installed inside the pipe fitting and compressed, the ring body 11 is also compressed, the diameter of the circular ring it forms decreases, and the two ends of the ring body 11 are pressed together, and the notch 113 disappears. At this time, this embodiment is in a closed circular ring shape, that is, the second state.

[0048] Locking teeth are convexly arranged on the inner surface of the ring body 11 as the locking components of this embodiment. As Figure 5 shown is the specific structural schematic diagram of the locking teeth in this embodiment. The locking teeth include a fixing part fixedly connected to the inner surface of the ring body 11 and a contact part protruding from the inner surface of the ring body 11. Among them, during use, the contact part contacts the pipe sleeved inside the pipe fitting, and when the pipe has a tendency to detach, it can be embedded in the outer surface of the pipe to play a role in locking the pipe. Specifically, the entire locking tooth is in the shape of a thin sheet, and the plane where the locking tooth is located forms a certain angle with the inner surface of the ring body 11, and this angle is less than 90 degrees. For the multiple locking teeth included in this embodiment, this angle is the same. In other embodiments, different settings of the angle can also be adopted according to specific needs. As Figure 5As shown, in this embodiment, a pair of locking teeth with their two fixing parts arranged close to each other and their contacting parts arranged separately (i.e., facing away from each other) form the first locking tooth group 111. The locking teeth with their two fixing parts arranged separately and their contacting parts arranged close to each other (i.e., facing each other) form the second locking tooth group 112. The two locking teeth included in the first locking tooth group 111 and the second locking tooth group 112 are both arranged axially symmetrically with respect to the first axis a. Although in this embodiment, the two locking teeth included in the first locking tooth group 111 have their fixing parts arranged adjacent to each other, in other embodiments, the fixing parts of the two locking teeth can be arranged separately, as long as the distance between the fixing parts is less than the distance between the contacting parts (i.e., facing away from each other) and they are axially symmetric with respect to the first axis a, similar technical effects can be achieved.

[0049] In either the first locking tooth group 111 or the second locking tooth group 112, there is at least one locking tooth arranged in the locking direction, that is, its fixing part points in the separating direction, while its contacting part points in the locking direction. The first locking tooth group 111 and the second locking tooth group 112 in this embodiment both include two locking teeth. In other embodiments, according to actual needs, more than two locking teeth can also be arranged in the locking tooth group, as long as it is ensured that at least one locking tooth is arranged in the locking direction.

[0050] As Figure 4 shown, in an embodiment of the present invention, the position setting schematic diagram of the first locking tooth group 111 and the second locking tooth group 112 is shown, and its three-dimensional schematic diagram is as Figure 2 . The first locking tooth group 111 and the second locking tooth group 112 are respectively arranged centrosymmetrically with respect to the second axis b. In this embodiment, preferably 6 groups of the first locking tooth group 111 and 5 groups of the second locking tooth group 112 are adopted. On the premise of being arranged centrosymmetrically with respect to the second axis b, the first locking tooth group 111 and the second locking tooth group 112 are arranged at intervals. However, the numbers of the first locking tooth group 111 and the second locking tooth group 112 are not fixed and can be adjusted according to the actual size and needs of the ring body. In other numbers, it is possible that the first locking tooth group 111 and the second locking tooth group 112 are not arranged at intervals.

[0051] As Figure 6 and Figure 7As shown, it is a schematic diagram of an embodiment of the present invention, which is used for pipeline compression connection. The pipe fitting 1 is sleeved on the outer surface of the pipe 2, and a sealing ring 3 and a gasket 4 are respectively arranged between the pipe 2 and the pipe fitting 1. When the pipe 2 presses the sealing ring 3 and the pipe fitting 1 tightly through the gasket 4, the sealing performance of the pipeline interface is good, and there will be no water leakage or air leakage. However, the pipe fitting 1 may be separated from the pipe 2 due to various reasons, so the ring body 11 of this embodiment is applied. Before the pipe fitting 1 is not compressed, the ring body 11 is sleeved on the pipe 2, and the gasket 4 and the sealing ring 3 are pressed tightly. At this time, the ring body 11 is in the first state, which is an unclosed ring with a gap 113. After the pipe fitting 1 is compressed, the diameter of the pipe fitting 1 becomes smaller, and the ring body 11 is restricted by the pipe fitting 1, and the gap 113 disappears. At this time, the ring body 11 is in the second state, and the locking teeth are embedded in the outer surface of the pipe 2.

[0052] When the pipe 2 has a tendency to separate from the pipe fitting 1, that is, the pipe 2 has a tendency to move in the separation direction. At this time, the pipe 2 generates a friction force pointing in the separation direction on the locking teeth. Among them, the locking teeth arranged in the locking direction, after being subjected to the friction force pointing in the separation direction, cause the locking teeth to deform, and the contact parts rotate around the fixed parts, that is, the thin-sheet locking teeth are lifted up. This movement causes the height of the contact part of the locking teeth from the inner surface of the ring body to further increase, thereby increasing the depth of the contact part embedded in the pipe 2, increasing the locking force of the ring body on the pipe 2, and further locking the pipe 2 to prevent it from falling out of the pipe fitting 1.

[0053] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A steel ring, comprising a ring body and a locking mechanism, characterized in that, the ring body has an inner surface and an outer surface, the locking mechanism includes a locking member, and the locking member is disposed on the inner surface of the ring body; the locking member protrudes from the inner surface, the locking member includes locking teeth, the locking teeth include a fixing portion and a contact portion, the fixing portion is fixedly disposed with the inner surface, and the contact portion is configured to protrude from the inner surface and incline in the direction of the second axis; the locking member includes a first set of locking teeth, the first set of locking teeth includes two or more locking teeth with different inclination directions, and in the first set of locking teeth, the distance between the fixing portions of each locking tooth and other locking teeth is less than the distance between the contact portions; the locking member includes a second set of locking teeth, the second set of locking teeth includes two or more locking teeth with different inclination directions, and in the second set of locking teeth, the distance between the fixing portions of each locking tooth and other locking teeth is greater than the distance between the contact portions.

2. The steel ring according to claim 1, characterized in that, the contact portion is in the shape of a thin sheet, the inclination angle of the contact portion is less than 90 degrees, and the inclination angle is the angle between the plane where the contact portion is located and the inner surface.

3. The steel ring according to claim 2, characterized in that, the inclination angles of each of the locking teeth in the first set of locking teeth are the same.

4. The steel ring according to claim 3, characterized in that, the number of the locking teeth in the first set of locking teeth is an even number and is arranged axially symmetrically with respect to the first axis.

5. The steel ring according to claim 4, characterized in that, in the first set of locking teeth, at least one of the locking teeth has its fixing portion close to the locking direction and its contact portion close to the disengaging direction.

6. The steel ring according to claim 5, characterized in that, it includes two or more sets of the first set of locking teeth.

7. The steel ring according to claim 6, characterized in that, the two or more sets of the first set of locking teeth are arranged centrosymmetrically with respect to the second axis.

8. The steel ring according to claim 2, characterized in that, the inclination angles of each of the locking teeth in the second set of locking teeth are the same.

9. The steel ring according to claim 8, characterized in that, the number of the locking teeth in the second set of locking teeth is an even number and is arranged axially symmetrically with respect to the first axis.

10. The steel ring according to claim 9, characterized in that, in the first set of locking teeth and the second set of locking teeth, at least one of the locking teeth has its fixing portion close to the locking direction and its contact portion close to the disengaging direction.

11. The steel ring according to claim 10, characterized in that, it includes two or more sets of the second set of locking teeth.

12. The steel ring according to claim 11, characterized in that, the two or more sets of the second set of locking teeth are arranged centrosymmetrically with respect to the second axis.

13. The steel ring according to claim 12, characterized in that, The axial distance between the locking teeth in the first locking tooth group is greater than the axial distance between the locking teeth in the second locking tooth group, and the axial distance is the distance from the contact part of the locking tooth to the first axis.

14. The steel ring according to claim 1, characterized in that, the steel ring is formed by one stamping.

15. The steel ring according to claim 1, characterized in that, the steel ring includes a first state and a second state, and in the first state, the steel ring is in an unclosed ring shape.

16. The steel ring according to claim 15, characterized in that, in the second state, the steel ring is in a closed ring shape.

Images