Metal and metal hard sealing movable joint

Abstract

The utility model discloses a metal and metal hard sealing movable joint, which comprises a joint main body, a first connecting part inserted on the joint main body, and a second connecting part in threaded connection with the joint main body, the first connecting part abuts against the second connecting part so that a closed overflowing channel can be formed between the first connecting part and the second connecting part, a plurality of positioning units are arranged on the periphery of the first connecting part, a positioning ring groove allowing the positioning units to be placed in is formed in the inner wall of the connector body, the positioning units are placed in the positioning ring groove, and the first connecting part abuts against the second connecting part. The first connecting part is limited to be kept at the current position.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of joint, specifically relates to a metal and metal hard sealing movable joint. BACKGROUND

[0002] The hard sealing movable joint is a high-strength pipeline connecting piece, adopts metal sealing surface direct contact, ensures the sealing property through precision machining, does not need soft gasket, and its characteristics include: high pressure resistance (up to 100MPa), high temperature resistance (-196 DEG C to +800 DEG C), vibration resistance, is suitable for harsh working conditions such as petroleum, chemical industry, electric power, is usually composed of body, compression nut and sealing ring, can be quickly disassembled and assembled, and is convenient to maintain.

[0003] The working principle of the existing hard sealing movable joint is that when the compression nut is tightened, the sealing ring is pushed to tightly adhere to the taper surface of the joint body, so that hard sealing is realized, but when the joint is in a harsh use environment, the threaded connection between the compression nut and the body may be loose, so that a gap appears between the compression nut and the sealing ring, and the joint leaks. UTILITY MODEL CONTENTS

[0004] To solve the technical problems in the background art, the utility model provides a metal and metal hard sealing movable joint.

[0005] The technical scheme adopted by the utility model to solve the technical problems is as follows:

[0006] A metal and metal hard sealing movable joint, comprising a joint body, a first connecting part inserted into the joint body, and a second connecting part threadedly connected with the joint body;

[0007] The first connecting part abuts against the second connecting part to form a closed flow channel between the first connecting part and the second connecting part, a plurality of positioning units are arranged on the outer periphery of the first connecting part, a positioning ring groove for the positioning units is formed on the inner wall of the joint body, and the positioning units are arranged in the positioning ring groove to limit the first connecting part to remain at the current position.

[0008] Preferably, an installation groove is formed on the outer periphery of the first connecting part, the positioning unit is placed in the installation groove, an elastic element is arranged in the installation groove, one end of the elastic element abuts against the installation groove, and the other end abuts against the positioning unit, so that the positioning unit always has a movement tendency of extending out of the installation groove. With the above improvement, when the first connecting part is threadedly connected with the joint body, the whole first connecting part gradually enters the joint body, and the positioning unit has a movement tendency of extending out of the installation groove under the action of the elastic element. When the first connecting part is lowered to a certain extent, the positioning unit is placed in the positioning ring groove, and at this time, the first connecting part abuts against the second connecting part, thereby ensuring the reliability of the first connecting part and the second connecting part in the abutting state, and ensuring that the threaded connection between the first connecting part and the joint body does not loosen in a harsh environment, thereby preventing a leakage gap from occurring between the first connecting part and the second connecting part.

[0009] Preferably, a communication groove is formed in the bottom of the first connecting part, an abutting sealing surface is arranged in the communication groove in a sloping manner, an arc-shaped sealing protrusion is arranged on the top of the second connecting part, and the sealing protrusion abuts against the abutting sealing surface, so that a closed flow passage is formed between the first connecting part and the second connecting part. With the above improvement, when the first connecting part rotates on the joint body, the first connecting part gradually lowers, so that the sealing protrusion on the top of the second connecting part abuts against the communication groove, and the sealing protrusion is arranged in an arc shape, the abutting sealing surface abuts against the sealing protrusion, and rapid sealing is achieved.

[0010] Preferably, the positioning units are arranged in an axial staggered manner along the first connecting part, the positioning ring groove comprises first positioning grooves and second positioning grooves arranged at intervals along the joint body, and the positioning units are respectively placed in the first positioning grooves and the second positioning grooves. With the above improvement, the positioning units are respectively placed in the first positioning grooves and the second positioning grooves, thereby further improving the reliability of the first connecting part in the abutting state with the second connecting part.

[0011] Preferably, the positioning units are arranged in an axial staggered manner along the first connecting part, the positioning ring groove comprises first positioning grooves and second positioning grooves arranged at intervals along the joint body, and the positioning units are respectively placed in the first positioning grooves and the second positioning grooves. With the above improvement, the positioning units are respectively placed in the first positioning grooves and the second positioning grooves, thereby further improving the reliability of the first connecting part in the abutting state with the second connecting part.

[0012] Preferably, an abutting boss is formed on the outer periphery of the second connecting part, the abutting boss abuts against the joint body, a first sealing groove is formed in the joint body, and a first sealing ring is embedded in the first sealing groove and abuts against the abutting boss. With the above improvement, the first connecting part is pressed downward to press the second connecting part downward to press the first sealing ring, thereby increasing the sealing property between the second connecting part and the joint body and avoiding leakage between the second connecting part and the joint body.

[0013] Preferably, the second sealing groove is formed between the joint body and the first connecting part, and a second sealing ring is embedded in the second sealing groove, so that the second sealing ring can shield the connecting part of the joint body and the first connecting part, and the sealing between the joint body and the first connecting part is improved.

[0014] Preferably, the joint body has a downwardly extending guide protrusion, and a third sealing ring is embedded on the inner wall of the guide protrusion, and the third sealing ring abuts against the outer wall of the second connecting part, so that the stability of the second connecting part is improved, and the sealing between the second connecting part and the joint body is improved.

[0015] Preferably, the joint body has a downwardly extending guide protrusion, and a third sealing ring is embedded on the inner wall of the guide protrusion, and the third sealing ring abuts against the outer wall of the second connecting part, so that the stability of the second connecting part is improved, and the sealing between the second connecting part and the joint body is improved.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The first connecting part and the joint body are threadedly connected, and the second connecting part is pressed, so that a closed flow channel is formed between the first connecting part and the second connecting part, and a plurality of positioning units are arranged on the outer periphery of the first connecting part, a positioning ring groove is formed on the inner wall of the joint body, the positioning units are arranged in the positioning ring groove, the first connecting part is limited to remain at the current position, so that the threaded connection of the first connecting part is prevented from loosening during use, and the sealing of the joint during use is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the overall structure of the utility model;

[0019] Figure 2 It is a sectional view of the overall structure of the utility model;

[0020] Figure 3 It is the joint body of the utility model; Figure 2 It is a local enlarged view of A in the middle;

[0021] In the diagram: 1. Connector body; 2. First connecting part; 3. Second connecting part; 4. Flow channel; 1.1. Positioning unit; 1.2. Positioning ring groove; 1.3. Mounting groove; 1.4. Elastic element; 1.5. Connecting groove; 1.6. Sealing protrusion; 1.7. Abutting boss; 2.1. First positioning groove; 2.2. Second positioning groove; 2.3. Abutting sealing surface; 3.1. First sealing groove; 3.2. First sealing ring; 3.3. Second sealing groove; 3.4. Second sealing ring; 3.5. Guide protrusion; 3.6. Third sealing ring; 4.1. Glue injection channel; Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0024] like Figures 1-3 As shown, a metal-to-metal hard-seal joint includes a joint body 1, a first connecting part 2 inserted into the joint body 1, and a second connecting part 3 threadedly connected to the joint body 1.

[0025] Specifically, the first connecting part 2 abuts against the second connecting part 3 so that a sealed flow channel 4 is formed between the first connecting part 2 and the second connecting part 3. A plurality of positioning units 1.1 are provided on the outer periphery of the first connecting part 2. A positioning ring groove 1.2 for the positioning units 1.1 to be inserted is formed on the inner wall of the connector body 1. The positioning unit 1.1 is inserted into the positioning ring groove 1.2 to restrict the first connecting part 2 to remain in the current position.

[0026] During assembly, the first connecting part 2 is threadedly connected to the connector body 1, and the second connecting part 3 is pressed by the first connecting part 2 to ensure the sealing between the connecting part and the second connecting part 3. When the first connecting part 2 presses the second connecting part 3, several positioning units 1.1 on the outer periphery of the first connecting part 2 are placed into the positioning ring groove 1.2 of the connector body 1, thereby ensuring reliable contact between the first connecting part 2 and the second connecting part 3, and ensuring that the threaded connection between the first connecting part 2 and the connector body 1 will not loosen during use, thus ensuring the sealing of the connector during use.

[0027] As shown in Figures 1-3 As a further explanation of the specific embodiment of the positioning unit 1.1, a mounting groove 1.3 is formed on the outer periphery of the first connecting part 2, the positioning unit 1.1 is placed in the mounting groove 1.3, and a resilient element 1.4 is arranged in the mounting groove 1.3, one end of the resilient element 1.4 abuts against the mounting groove 1.3, and the other end abuts against the positioning unit 1.1, so that the positioning unit 1.1 always has a movement tendency of protruding out of the mounting groove 1.3.

[0028] During the installation of the first connecting part 2, as the first connecting part 2 is threadedly connected with the joint body 1, the entire first connecting part 2 gradually enters into the joint body 1, and the positioning unit 1.1 has a movement tendency of protruding out of the mounting groove 1.3 under the action of the resilient element 1.4, when the first connecting part 2 is lowered to a certain extent, the positioning unit 1.1 is placed into the positioning ring groove 1.2, and at this time, the first connecting part 2 abuts against the second connecting part 3, thereby ensuring the reliability of the first connecting part 2 and the second connecting part 3 in the abutting state, and avoiding loosening of the threaded connection between the first connecting part 2 and the joint body 1 in a harsh environment, which causes a leakage gap between the first connecting part 2 and the second connecting part 3.

[0029] Further, the positioning units 1.1 are arranged axially staggered along the first connecting part 2, and the positioning ring groove 1.2 includes a first positioning groove 2.1 and a second positioning groove 2.2 arranged at intervals along the joint body 1, and the positioning units 1.1 are respectively placed in the first positioning groove 2.1 and the second positioning groove 2.2, thereby further improving the reliability of the first connecting part 2 in maintaining the abutting state with the second connecting part 3.

[0030] As a preferred embodiment, the positioning unit 1.1 is arranged in a spherical shape, and the output end of the mounting groove 1.3 is formed with a limiting protrusion to limit the positioning unit 1.1 from completely leaving the mounting groove 1.3, and the positioning unit 1.1 partially protrudes out of the mounting groove 1.3, thereby improving the smoothness of the first connecting part 2 during the installation process, and improving the convenience during the assembly process.

[0031] In addition, a second sealing groove 3.3 is formed between the joint body 1 and the first connecting part 2, and a second sealing ring 3.4 is embedded in the second sealing groove 3.3, and through the above improvement, the second sealing ring 3.4 can shield the connecting part between the joint body 1 and the first connecting part 2, and improve the sealing between the joint body 1 and the first connecting part 2

[0032] As shown in Figures 1-3As shown, for further explanation of the cooperation between the joint body 1, the first connecting part 2 and the second connecting part 3, the bottom of the first connecting part 2 is provided with a communication groove 1.5, and the communication groove 1.5 is provided with an inclined abutting sealing surface 2.3, and the top of the second connecting part 3 is provided with an arc-shaped sealing protrusion 1.6, the sealing protrusion 1.6 abuts against the groove wall of the abutting sealing surface 2.3, so that the first connecting part 2 and the second connecting part 3 form a closed flow channel 4.

[0033] During the whole assembly process of the sealing union joint, as the first connecting part 2 rotates on the joint body 1, the first connecting part 2 gradually descends, so that the sealing protrusion 1.6 at the top of the second connecting part 3 abuts against the communication groove 1.5, and the sealing protrusion 1.6 is arc-shaped, and the abutting sealing surface 2.3 abuts against the sealing protrusion 1.6, so that rapid sealing is realized.

[0034] Further, the second connecting part 3 is provided with an abutting boss 1.7, the abutting boss 1.7 abuts against the joint body 1, and the joint body 1 is provided with a first sealing groove 3.1, and a first sealing ring 3.2 is embedded in the first sealing groove 3.1, the first sealing ring 3.2 abuts against the abutting boss 1.7, and the first connecting part 2 extrudes the second connecting part downward, so that the first connecting part 2 extrudes the first sealing ring 3.2 downward, thereby increasing the sealing property between the second connecting part and the joint body 1, and avoiding leakage between the second connecting part and the joint body 1.

[0035] In addition, the joint body 1 is provided with a downwardly extending guide protrusion 3.5, and a third sealing ring 3.6 is embedded on the inner wall of the guide protrusion 3.5, and the third sealing ring 3.6 abuts against the outer wall of the second connecting part 3, thereby improving the stability of the installation of the second connecting part 3, and improving the sealing property between the second connecting part 3 and the joint body 1.

[0036] As shown, Figure 2 In some other embodiments, the joint body 1 is provided with a glue injection channel 4.1, and the output end of the glue injection channel 4.1 is arranged opposite to the threaded connection area of the first connecting part 2 and the joint body 1, and the threaded glue can be injected through the glue injection channel 4.1, thereby further improving the stability and reliability of the connection between the first connecting part 2 and the joint body 1.

[0037] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and those skilled in the art can make modifications without creative contribution according to the needs after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A metal-to-metal hard-seal joint, characterized in that, It includes a connector body (1), a first connecting part (2) inserted into the connector body (1), and a second connecting part (3) threadedly connected to the connector body (1); The first connecting part (2) abuts against the second connecting part (3) so that a closed flow channel (4) is formed between the first connecting part (2) and the second connecting part (3). A plurality of positioning units (1.1) are provided on the outer periphery of the first connecting part (2). A positioning ring groove (1.2) for the positioning unit (1.1) to be inserted is formed on the inner wall of the connector body (1). The positioning unit (1.1) is inserted into the positioning ring groove (1.2) to restrict the first connecting part (2) to remain in the current position.

2. The metal-to-metal hard-seal joint according to claim 1, characterized in that: An installation groove (1.3) is formed on the outer periphery of the first connecting part (2). The positioning unit (1.1) is placed in the installation groove (1.3). An elastic element (1.4) is provided in the installation groove (1.3). One end of the elastic element (1.4) abuts against the installation groove (1.3) and the other end abuts against the positioning unit (1.1) so that the positioning unit (1.1) always has the tendency to extend out of the installation groove (1.3).

3. The metal-to-metal hard-seal joint according to claim 1, characterized in that: The bottom of the first connecting part (2) is provided with a connecting groove (1.5), and an inclined abutment sealing surface (2.3) is formed on the connecting groove (1.5). The top of the second connecting part (3) is provided with an arc-shaped sealing protrusion (1.6), and the sealing protrusion (1.6) abuts against the abutment sealing surface (2.3) so that a closed flow channel (4) is formed between the first connecting part (2) and the second connecting part (3).

4. A metal-to-metal hard-seal joint according to claim 2, characterized in that: The positioning units (1.1) are staggered along the axial direction of the first connecting part (2), and the positioning ring groove (1.2) includes a first positioning groove (2.1) and a second positioning groove (2.2) arranged at intervals along the connector body (1). The positioning units (1.1) are respectively placed in the first positioning groove (2.1) and the second positioning groove (2.2).

5. A metal-to-metal hard-seal joint according to claim 1, characterized in that: The positioning unit (1.1) is spherically shaped and partially extends out of the mounting groove (1.3).

6. A metal-to-metal hard-seal joint according to claim 1, characterized in that: The second connecting part (3) has an abutting boss (1.7) formed on its outer periphery. The abutting boss (1.7) abuts against the connector body (1). The connector body (1) has a first sealing groove (3.1) formed inside. The first sealing groove (3.1) is fitted with a first sealing ring (3.2). The first sealing ring (3.2) abuts against the abutting boss (1.7).

7. A metal-to-metal hard-seal joint according to claim 1, characterized in that: The connector body (1) and the first connecting part (2) form a second sealing groove (3.3), and a second sealing ring (3.4) is embedded in the second sealing groove (3.3).

8. A metal-to-metal hard-seal joint according to claim 1, characterized in that: The connector body (1) has a downwardly extending guide protrusion (3.5), and a third sealing ring (3.6) is embedded on the inner wall of the guide protrusion (3.5), which abuts against the outer wall of the second connecting part (3).

9. A metal-to-metal hard-seal joint according to claim 1, characterized in that: The connector body (1) has an injection channel (4.1) formed on it, and the output end of the injection channel (4.1) is disposed opposite to the threaded connection area of ​​the first connecting part (2) and the connector body (1).

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