Carbon steel compression joint type water swelling forming three-way pipe fitting

Abstract

The utility model discloses a carbon steel crimping type water expansion forming three-way pipe fitting, which relates to the technical field of pipeline equipment and comprises a pipe fitting main body and a fixing device, a first crimping head and a second crimping head are fixed at the left end and the right end of the pipe fitting main body, and a third crimping head is arranged at the upper end of the pipe fitting main body. The ends of the outer side walls of the first crimping head, the second crimping head and the third crimping head are each of an arch structure, a sealing ring containing groove is formed in the inner wall of each arch structure, an O-shaped sealing ring is arranged in each sealing ring containing groove, and the fixing device is arranged on the pipe fitting body. By adopting the clamping and pressing connection and the fixing device, the connection between the pipe fitting and the section bar is more reliable, the construction is simple, convenient and rapid, the connection quality is more stable, the construction cost is low, the requirements of the public can be met, and meanwhile, the clamping and pressing connection is only extrusion between metals and is environment-friendly and pollution-free.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline equipment, in particular to a carbon steel press-fit hydroformed three-way pipe fitting. Background Technique

[0002] The three-way pipe fitting is a pipeline connector used at the confluence of three identical or different pipelines. Its main function is to change the direction of the fluid. It can be divided into equal-diameter three-way and reduced-diameter three-way according to the pipe diameter size. The three-way pipe fitting is divided into carbon steel, cast steel, alloy steel, stainless steel and other materials according to the material. The commonly used processing methods are hydraulic bulging and hot pressing. As a connector, the connection method between the three-way pipe fitting and the steel is generally welding connection or thread connection, etc. However, the traditional connection methods have many drawbacks:

[0003] (1) Welding connection: During the construction of welding connection, heavy tools and many auxiliary materials are required. Open-flame welding is used during installation, which has many safety hazards. Painting needs to be repeated many times during installation and later maintenance, which requires high skills of workers, unstable quality, long process time and high cost.

[0004] (2) Thread connection: During the construction of thread connection, heavy tools and many auxiliary materials are required. It requires a heavy and complicated threading process and needs to be operated by professional technicians with long working experience. Painting also needs to be repeated many times later, and the process time is long.

[0005] In addition, at present, after the pipe and the pipe fitting are installed, the pipe and the pipe fitting are placed naturally in the air. When people carry objects or accidentally touch the pipe or the pipe fitting, each external force collision of the pipe and the pipe fitting will cause the relative position of the pipe or the pipe fitting to change, and there is a hidden danger of fluid leakage. Therefore, it is necessary to improve the existing technology to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the defects and deficiencies existing in the three-way pipe fitting in the existing market, and provide a carbon steel press-fit hydroformed three-way pipe fitting, which adopts the method of crimping connection and fixing device to fix the pipe fitting, making the connection between the pipe fitting and the profile more tight and reliable, the construction simple and fast, and the construction cost low.

[0007] To achieve the above purpose, the utility model provides a carbon steel press-fit hydroformed three-way pipe fitting, which includes a pipe fitting main body and a fixing device. The left and right ends of the pipe fitting main body are fixed with a first press joint and a second press joint. A third press joint is arranged at the upper end of the pipe fitting main body. The outer side wall ends of the first press joint, the second press joint and the third press joint are all set as arched structures. An O-ring placement groove is arranged on the inner wall of the arched structure, and an O-ring is arranged inside the O-ring placement groove. The fixing device is arranged on the pipe fitting main body.

[0008] Preferably, the first compression joint, the second compression joint and the pipe fitting body are of an integral structure. A weld seam is provided between the third compression joint and the pipe fitting body, and the third compression joint is fixed to the pipe fitting body by welding.

[0009] Preferably, the fixing device includes a mounting plate, a support rod and a fixing bracket. The fixing bracket includes a front cover and a rear cover. The front cover and the rear cover are fixedly connected by a first bolt and a nut. A moving rod is welded to the middle of the rear cover. A positioning column is provided at the end of the moving rod. A plurality of positioning holes are provided on the support rod. The moving rod is nested inside the support rod and is fixedly connected by the positioning column and the positioning holes. The support rod is arranged at the center of the mounting plate.

[0010] Preferably, a spring is provided at the bottom end of the positioning column, and the number of the positioning holes is set to 6.

[0011] Preferably, the mounting plate is provided with mounting holes, and the number of the mounting holes is 2. The mounting plate is fixed to the wall by a second bolt.

[0012] Preferably, the first compression joint and the second compression joint are symmetric with each other about the central axis of the pipe fitting body.

[0013] Preferably, the O-ring is made of ethylene propylene diene monomer rubber.

[0014] Therefore, the present utility model provides a carbon steel press-connecting hydroforming three-way pipe fitting. The present utility model has the following beneficial effects:

[0015] In the present utility model, the outer side wall ends of the first compression joint, the second compression joint and the third compression joint are all provided with an arched structure. The arched structures are all made by a hydroforming process. An O-ring is provided on the inner wall of the arched structure to play a sealing role. The press-connecting method is used for one-time press-forming. The cross-section of the pressed position is hexagonal to achieve anti-rotation. The pressed part is deformed, smaller in the middle and larger at both ends to achieve anti-pull-out. This makes the connection between the pipe fitting and the profile more tightly reliable, the construction is simple and fast, and the construction cost is low. The press-connecting is only the extrusion between metals, which is environmentally friendly and pollution-free. At the same time, the pipe fitting is fixed by a fixing device, which can avoid the problem of leakage caused by the relative position change between the pipe and the pipe fitting due to external force collision.

[0016] The technical solution of the present utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a carbon steel press-connecting hydroforming three-way pipe fitting of the present utility model;

[0018] Figure 2 Front view of a carbon steel press - fit hydroforming tee fitting of the present utility model;

[0019] Figure 3 Schematic structural diagram of the fixing device of a carbon steel press - fit hydroforming tee fitting of the present utility model;

[0020] Figure 4 Axonometric view of a carbon steel press - fit hydroforming tee fitting of the present utility model;

[0021] Figure 5 Left view of a carbon steel press - fit hydroforming tee fitting of the present utility model;

[0022] Figure 6 is Figure 5 Partial enlarged view at position A of

[0023] Reference numerals

[0024] 1, fitting main body; 2, first press - joint; 3, second press - joint; 4, third press - joint; 5, arched structure; 6, sealing ring placement groove; 7, O - ring; 8, fixing device; 801, mounting plate; 802, support rod; 803, moving rod; 9, fixing frame; 901, upper cover; 902, lower cover; 10, first bolt; 11, weld; 12, nut; 13, second bolt; 14, mounting hole; 15, positioning post; 16, positioning hole; 17, spring. Detailed implementation manners

[0025] The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0026] Unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0027] Embodiment

[0028] As Figures 1-6As shown in the figure, a carbon steel press-fit hydroforming tee pipe fitting of the present utility model includes a pipe fitting main body 1. A first press joint 2 and a second press joint 3 are fixed at the left and right ends of the pipe fitting main body. A third press joint 4 is provided at the upper end of the pipe fitting main body 1. The outer wall ends of the first press joint 2, the second press joint 3 and the third press joint 4 are all provided with an arched structure 5. An O-ring placement groove 6 is provided on the inner wall of the arched structure 5. An O-ring 7 is provided inside the O-ring placement groove 6. A fixing device 8 is provided on the first press joint 2 and the second press joint 3.

[0029] The first press joint 2, the second press joint 3 and the pipe fitting main body 1 are of an integral structure. A weld 11 is provided between the third press joint 4 and the pipe fitting main body 1. The third press joint 4 is fixed to the pipe fitting main body 1 by welding.

[0030] The fixing device 8 includes a mounting plate 801, a support rod 802 and a fixing frame 9. The fixing frame 9 includes a front cover 901 and a rear cover 902. The front cover 901 and the rear cover 902 are fixedly connected by a first bolt 10 and a nut 12. A moving rod 803 is welded in the middle of the rear cover 902. A positioning column 15 is provided at the end of the moving rod 803. A number of positioning holes 16 are provided on the support rod 802. The moving rod 803 is nested inside the support rod 802 and is fixedly connected by the positioning column 15 and the positioning holes 16. The support rod 802 is provided at the central position of the mounting plate 801.

[0031] A spring 17 is provided at the bottom end of the positioning column 15. The positioning column 15 can be telescoped after being pressed by force. The number of the positioning holes 16 is set to 6.

[0032] The mounting plate is provided with mounting holes 14, and the number of the mounting holes 14 is 2. The mounting plate is fixed to the wall by a second bolt 13.

[0033] The first press joint 2 and the second press joint 3 are symmetric with each other about the central axis of the pipe fitting main body 1.

[0034] The material of the O-ring 7 is ethylene propylene diene monomer rubber.

[0035] The working principle of a carbon steel press-fit hydroforming tee pipe fitting of the present utility model:

[0036] The upper end and the left and right ends of the pipe fitting body 1 are respectively inserted into the pipe. Then, the pipe fitting body 1 and the pipe are connected by crimping with a special crimping tool. The cross-section of the crimping position is hexagonal, which can achieve anti-rotation. The crimped part is deformed, smaller in the middle and larger at both ends, which can achieve anti-pull-out. At the same time, the arched structure 5 will be deformed, and the O-ring 7 inside it will squeeze the pipe, enhancing the sealing performance of the connection between the pipe fitting and the pipe. The pipe fitting is fixed by the fixing device 8. By arranging the fixing frame 9 on the corresponding pipe fitting body 1, then the front cover 901 and the rear cover 902 fix the pipe fitting body 1 through the first bolt 10 and the nut 12. Press the positioning column 15 to adjust the moving rod 803 to a suitable position. The moving rod 803 is fixedly connected to the support rod 802 through the positioning column 15 and the positioning hole 16. In the natural state, the positioning column 15 is in the extended state and can be retracted into the moving rod by applying force to press. The fixed connection between the positioning column 15 and the positioning hole 16 can adjust the length of the fixing device. Finally, the mounting plate 801 is fixed on the corresponding wall surface, thus completing the fixation of the pipe fitting. The fixing device can avoid the problem that the relative position of the pipe and the pipe fitting changes due to the pipe or the pipe fitting being collided by external force, resulting in leakage.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A carbon steel press-fit hydroformed tee pipe fitting, characterized in that: It includes a pipe fitting body and a fixing device. First and second compression joints are fixed to the left and right ends of the pipe fitting body respectively. A third compression joint is provided at the upper end of the pipe fitting body. The outer wall ends of the first compression joint, the second compression joint, and the third compression joint are all arranged as arched structures. A sealing ring placement groove is provided on the inner wall of the arched structure. An O-ring is arranged inside the sealing ring placement groove. The fixing device is arranged on the pipe fitting body.

2. A carbon steel press-fitting hydroforming three-way pipe fitting according to claim 1, characterized in that: The first compression joint, the second compression joint, and the pipe fitting body are of an integral structure. A weld seam is provided between the third compression joint and the pipe fitting body. The third compression joint is fixed to the pipe fitting body by welding.

3. A carbon steel press-fit hydroforming tee fitting according to claim 1, characterized in that: The fixing device includes a mounting plate, a support rod, and a fixing bracket. The fixing bracket includes a front cover and a rear cover. The front cover and the rear cover are fixedly connected by a first bolt and a nut. A moving rod is welded to the middle of the rear cover. A positioning column is arranged at the end of the moving rod. A number of positioning holes are provided on the support rod. The moving rod is nested inside the support rod and is fixedly connected through the positioning column and the positioning holes. The support rod is arranged at the central position of the mounting plate.

4. A carbon steel press-fit hydroforming tee fitting according to claim 3, wherein: A spring is arranged at the bottom end of the positioning column. The number of the positioning holes is set to 6.

5. A carbon steel press-fit hydroformed three-way pipe fitting according to claim 4, characterized in that: Mounting holes are provided on the mounting plate, and the number of the mounting holes is 2. The mounting plate is fixed to the wall by a second bolt.

6. A carbon steel press-fit hydroforming tee fitting according to claim 1, characterized in that: The first compression joint and the second compression joint are symmetric to each other with the pipe fitting body as the central axis.

7. A carbon steel press-fit hydroforming tee fitting according to claim 1, characterized in that: The material of the O-ring is ethylene propylene diene monomer rubber.

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