Self-locking sealing pipe body connecting structure of non-rotating self-balancing screw thread

Abstract

The invention discloses a self-locking sealing pipe body connecting structure of a non-rotating self-balancing screw thread, and relates to the technical field of mechanical engineering, the self-locking sealing pipe body connecting structure comprises two joints and a fastening nut; a connector positive male buckle and a connector negative male buckle are arranged on the two sides of the connector, the diameter of the connector positive male buckle and the diameter of the connector negative male buckle are smaller than those of the connector, connector sealing slopes extending towards the inner wall of the connector are arranged on the connector positive male buckle and the connector negative male buckle respectively, and self-balancing anti-loosening protruding columns and self-balancing anti-loosening pits extending in the axial direction are arranged on the end faces of the two sides of the connector positive male buckle and the end faces of the two sides of the connector negative male buckle respectively. The self-balancing anti-loosening convex column on one joint is inserted into the self-balancing anti-loosening concave pit on the other joint; a fastening nut sealing face of a groove structure is arranged in the middle of the inner wall of the fastening nut, a fastening nut positive female buckle and a fastening nut negative female buckle are arranged on the portions, located on the two sides of the fastening nut sealing face, of the inner wall of the fastening nut respectively, the two joints are fixedly connected through rotation of the fastening nut, the outer diameter of the joints is not increased, and the connection strength between the joints can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering technology, and in particular to a self-locking sealing tube connection structure with non-rotating self-balancing threads. Background Technology

[0002] The connector for slender pipes is a core component connecting the pipes and ensuring system functionality; its performance directly determines the safety, stability, and efficiency of the pipe system. The connector is not simply a "connecting part," but rather a "functional hub" of the pipe system, its importance manifested in the following four aspects: First, ensuring system sealing to prevent media leakage; second, maintaining the structural stability of the pipe system; third, adapting to system pressure / temperature to ensure durability; and fourth, improving system flexibility and maintainability. Slender pipe connectors mainly include threaded, quick-connect, clamp, welded, and compression structures, which can basically solve most connection needs for slender pipes. However, there is currently no metal connector that requires the two pipes to not rotate, cannot be welded, the connector's outer diameter to be no larger than the pipe's outer diameter, guarantees tensile, compressive, bending, and torsional strength, does not loosen during vibration, and maintains good sealing performance.

[0003] Currently, there are many applications for pipes where both pipe bodies contain cables, wires, and thin tubes that are fixedly connected to them, and the outer diameter of the joint between the pipe bodies is no larger than the outer diameter of the pipe body. Therefore, it is necessary to propose a self-locking sealing pipe connection method with non-rotating self-balancing threads to fill the current technological gap and promote related technological progress. Summary of the Invention

[0004] The purpose of this invention is to fill the gap in the prior art by providing a self-locking sealing tube connection structure with non-rotating self-balancing threads.

[0005] A self-locking sealing tube connection structure with non-rotating self-balancing threads, comprising two connectors and a fastening nut; The connector has a male and a female thread with a diameter smaller than the connector on both sides. The male thread has a forward thread and the female thread has a reverse thread. Both the male and female threads have a sealing bevel extending into the inner wall of the connector. The male and female threads have self-balancing anti-loosening protrusions and self-balancing anti-loosening recesses extending in their axial direction on their respective end faces. The self-balancing anti-loosening protrusion on one connector is inserted into the self-balancing anti-loosening recess on the other connector. The inner wall of the fastening nut has a grooved sealing surface in the middle. The inner wall of the fastening nut has a positive thread and a negative thread on both sides of the sealing surface. The positive thread has a forward thread and the negative thread has a reverse thread. The diameter of the fastening nut should not be greater than the diameter of the connector.

[0006] Preferably, it also includes a plurality of joint fixing blind holes circumferentially distributed on the outer wall of the joint.

[0007] Preferably, the fastening nut has a transition area extending along its axial direction on the outer side of the positive and negative female threads of the fastening nut, and the outer wall of the fastening nut has multiple anti-loosening sealing thread holes that penetrate the transition area.

[0008] Preferably, it also includes multiple blind holes for unfastening nuts that are circumferentially distributed on the outer wall of the fastening nut.

[0009] Preferably, it also includes a main sealing ring, a sealing gasket, and two sealing rings; The sealing gasket is clamped between the two proximal end faces of the two connectors; The main sealing ring is held between the joint and the fastening nut; Two sealing rings are respectively clamped between the end face of the fastening nut and the connector.

[0010] Preferably, the main sealing ring includes a first main sealing ring sealing surface, a second main sealing ring sealing surface, and a third main sealing ring sealing surface; The first and third sealing surfaces of the main sealing ring are symmetrically arranged on both sides of the second sealing surface of the main sealing ring. The second sealing surface of the main sealing ring protrudes outward and can be embedded in the sealing surface of the fastening nut. The first sealing surface of the main sealing ring is placed on the outer sealing slope of the male thread of one connector, and the second sealing surface of the main sealing ring is placed on the outer sealing slope of the reverse male thread of another connector.

[0011] Preferably, the outer wall of the sealing gasket is provided with a sealing gasket recess that matches the number of self-balancing anti-loosening protrusions.

[0012] Compared with existing technologies, the advantages of this technology are: The two connectors do not need to be rotated; they can be fixedly connected by turning the fastening nut, which ensures the connection strength between the connectors without increasing the outer diameter of the connectors. The main sealing ring, sealing gasket, and sealing ring seal the gap between the two joints and the fastening nut in three levels. From the inside out, the sealing gasket is the first level of sealing, the main sealing ring is the second level of sealing, and the sealing ring is the third level of sealing. The main sealing ring is the main sealing component, and the other two are auxiliary sealing components. The fit between the self-balancing anti-loosening protrusions and self-balancing anti-loosening recesses at both ends of the connector can limit the relative balance between the male threads at both ends of the connector and the fastening nuts, thus playing a self-locking role. The anti-loosening sealing thread hole further restricts and prevents the self-rotation of the fastening nut from loosening. Attached Figure Description

[0013] Figure 1 This is an axial sectional view of the present invention; Figure 2This is a connection state diagram of the present invention; Figure 3 It is a three-dimensional schematic diagram of the connector; Figure 4 This is a three-dimensional schematic diagram of a fastening nut; Figure 5 This is a three-dimensional schematic diagram of the main sealing ring; Figure 6 This is a three-dimensional schematic diagram of a sealing gasket; In the picture: 1: Connector; 2: Fastening nut; 3: Main sealing ring; 4: Sealing gasket; 5: Sealing ring; 101: Male connector thread; 102: Male connector thread; 103: Connector fixing blind hole; 104: Connector sealing bevel; 105: Self-balancing anti-loosening protrusion; 106: Self-balancing anti-loosening recess; 201: Female fastening nut thread; 202: Female fastening nut thread; 203: Anti-loosening sealing thread hole; 204: Blind hole for upper shackle on fastening nut; 205: Sealing surface of fastening nut; 301: Sealing surface one of main sealing ring; 302: Sealing surface two of main sealing ring; 303: Sealing surface three of main sealing ring; 401: Sealing gasket recess. Detailed Implementation

[0014] Referring to the attached drawings, a self-locking sealing tube connection structure with non-rotating self-balancing threads includes two connectors 1, a fastening nut 2, a main sealing ring 3, a sealing gasket 4, and a sealing ring 5. The connector 1 includes a male connector thread 101, a female connector thread 102, a blind hole for fixing the connector 103, a sealing bevel for the connector 104, a self-balancing anti-loosening protrusion 105, and a self-balancing anti-loosening recess 106. The connector 1 has a male connector 101 and a female connector 102 with a diameter smaller than that of the connector 1 on both sides. The male connector 101 has a forward thread and the female connector 102 has a reverse thread. Both the male connector 101 and the female connector 102 have a connector sealing slope 104 extending into the inner wall of the connector 1. The two end faces of the male connector 101 and the female connector 102 have self-balancing anti-loosening protrusions 105 and self-balancing anti-loosening recesses 106 extending in their axial direction, respectively. The outer wall of the connector 1 has a plurality of connector fixing blind holes 103 distributed circumferentially. The self-balancing anti-loosening protrusion 105 on one of the connectors 1 is inserted into the self-balancing anti-loosening recess 106 on another connector 1. The fastening nut 2 includes a fastening nut positive female thread 201, a fastening nut reverse female thread 202, an anti-loosening sealing thread hole 203, a fastening nut upper detachment blind hole 204, and a fastening nut sealing surface 205; The inner wall of the fastening nut 2 has a grooved sealing surface 205. The inner wall of the fastening nut 2 has a positive female thread 201 and a negative female thread 202 on both sides of the sealing surface 205. The positive female thread 201 has a positive thread and the negative female thread 202 has a negative thread. The fastening nut 2 has a transition area extending along its axial direction on the outer side of the positive female thread 201 and the negative female thread 202. The outer wall of the fastening nut 2 has multiple anti-loosening sealing thread holes 203 that penetrate the transition area. The outer wall of the fastening nut 2 has multiple fastening nut detachment blind holes 204 distributed circumferentially. The main sealing ring 3 includes a first main sealing ring sealing surface 301, a second main sealing ring sealing surface 302, and a third main sealing ring sealing surface 303; The main sealing ring sealing surface 1 301 and the main sealing ring sealing surface 303 are symmetrically arranged on both sides of the main sealing ring sealing surface 2 302. The main sealing ring sealing surface 2 302 protrudes outward and can be embedded in the fastening nut sealing surface 205. The main sealing ring sealing surface 1 301 is fitted on the outer joint sealing slope 104 of the male connector 1 of one connector 1. The main sealing ring sealing surface 2 302 is fitted on the outer joint sealing slope 104 of the reverse connector 102 of another connector 1. The outer wall of the sealing gasket 4 is provided with sealing gasket recesses 401 that match the number of self-balancing anti-loosening protrusions 105. The sealing gasket 4 is clamped between the close end faces of the two connectors 1. Two sealing rings 5 ​​are respectively clamped between the end face of the fastening nut 2 and the connector 1; The diameter of fastening nut 2 should not be greater than the diameter of connector 1.

[0015] The working process and operating principle of this invention: When in use, first place the sealing gasket 4 on the end face of a connector 1 so that the sealing gasket recess 401 matches the self-balancing anti-loosening protrusion 105. Embed the sealing surface 302 of the main sealing ring into the sealing surface 205 of the fastening nut; Align the self-balancing anti-loosening protrusion 105 on one connector 1 with the self-balancing anti-loosening recess 106 on the other connector 1 axially, and place the fastening nut 2 between the two connectors 1. Keeping both connectors 1 stationary, simply rotate the fastening nut 2. The fastening nut 2 will then move the two connectors 1 closer together, and the two connectors 1 will not rotate during the process of moving closer together. The connector fixing blind hole 103 and the fastening nut shackle blind hole 204 are for facilitating the clamping, fixing or rotation of the connector 1 and the fastening nut 2; A set screw can be screwed into the anti-loosening sealing thread hole 203 to further enhance the binding force between the fastening nut 2 and the connector 1; This structure exhibits a more pronounced self-locking effect when applied to rotating and vibrating structures such as drill pipes.

Claims

1. A self-locking sealing tube connection structure with non-rotating self-balancing threads, characterized in that: Includes two connectors and a fastening nut; The connector has a male and a female thread with a diameter smaller than the connector on both sides. The male thread has a forward thread and the female thread has a reverse thread. Both the male and female threads have a sealing bevel extending into the inner wall of the connector. The male and female threads have self-balancing anti-loosening protrusions and self-balancing anti-loosening recesses extending in their axial direction on their respective end faces. The self-balancing anti-loosening protrusion on one connector is inserted into the self-balancing anti-loosening recess on the other connector. The inner wall of the fastening nut has a grooved sealing surface in the middle. The inner wall of the fastening nut has a positive thread and a negative thread on both sides of the sealing surface. The positive thread has a positive thread and the negative thread has a negative thread.

2. The self-locking sealing tube connection structure with non-rotating self-balancing threads according to claim 1, characterized in that: It also includes multiple blind holes for fixing the joint that are circumferentially distributed on the outer wall of the joint.

3. The self-locking sealing tube connection structure with non-rotating self-balancing threads according to claim 1, characterized in that: The fastening nut has a transition zone extending along its axial direction on the outside of the positive and negative threads of the fastening nut, and the outer wall of the fastening nut has multiple anti-loosening sealing thread holes that penetrate the transition zone.

4. The self-locking sealing tube connection structure with non-rotating self-balancing threads according to claim 1, characterized in that: It also includes multiple blind holes for unfastening nuts that are circumferentially distributed on the outer wall of the fastening nut.

5. The self-locking sealing tube connection structure with non-rotating self-balancing threads according to claim 1, characterized in that: It also includes a main sealing ring, a sealing gasket, and two sealing rings; The sealing gasket is clamped between the two proximal end faces of the two connectors; The main sealing ring is held between the joint and the fastening nut; Two sealing rings are respectively clamped between the end face of the fastening nut and the connector.

6. The self-locking sealing tube connection structure with non-rotating self-balancing threads according to claim 5, characterized in that: The main sealing ring includes main sealing ring sealing surface one, main sealing ring sealing surface two, and main sealing ring sealing surface three; The first and third sealing surfaces of the main sealing ring are symmetrically arranged on both sides of the second sealing surface of the main sealing ring. The second sealing surface of the main sealing ring protrudes outward and can be embedded in the sealing surface of the fastening nut. The first sealing surface of the main sealing ring is placed on the outer sealing slope of the male thread of one connector, and the second sealing surface of the main sealing ring is placed on the outer sealing slope of the reverse male thread of another connector.

7. The self-locking sealing tube connection structure with non-rotating self-balancing threads according to claim 5, characterized in that: The outer wall of the sealing gasket has a gasket recess that matches the number of self-balancing anti-loosening protrusions.

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