A hydraulic pipe fitting

Abstract

This utility model belongs to the field of pipe fitting technology, specifically relating to a hydraulic pipe fitting; it includes a first fitting, with a first assembly ring fixedly installed at the right end of the first fitting, a hexagonal nut rotatably fitted on the right side of the first assembly ring, and a first sealing ring fixedly installed on the right side of the assembly ring; a second fitting, with a second assembly ring fixedly installed at one end of the second fitting near the first fitting, and an externally threaded pipe threaded to the hexagonal nut fixedly installed at the other end of the second assembly ring near the first fitting, with a second sealing ring fixedly installed at the end of the externally threaded pipe; a fastening mechanism is provided between the hexagonal nut and the second assembly ring; this utility model has a simple and reasonable structure. In use, after the first fitting and the second fitting are fastened together, the fastening mechanism can lock the hexagonal nut and the second assembly ring, preventing the hexagonal nut from rotating and causing the connection to loosen.

Description

Technical Field

[0001] This utility model belongs to the field of pipe fitting technology, and specifically relates to a hydraulic pipe fitting. Background Technology

[0002] Hydraulic pipe fittings, as core components connecting pipelines in hydraulic systems, directly affect the stability and safety of liquid medium transmission. Currently mainstream threaded hydraulic pipe fittings exhibit significant limitations in practical applications: the mechanical locking of the threaded engagement relies on static friction. When the system is running, the pulsating flow of the hydraulic medium can induce high-frequency vibrations in the pipeline, which, over time, can easily lead to axial loosening of the threaded pair.

[0003] Such loosening can reduce the sealing reliability of the connection structure, which may lead to hydraulic oil leakage, causing environmental pollution and system efficiency loss. It can also aggravate the swaying of the pipeline, causing certain safety hazards. Therefore, it needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic pipe connector that, when the first connector is fastened to the second structure, can use a fastening mechanism to lock the hexagonal nut and the second assembly ring, preventing the hexagonal nut from rotating and causing the connection to loosen.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A hydraulic pipe fitting, comprising

[0007] The first connector has a first assembly ring fixedly installed on its right end, a hexagonal nut rotatably mounted on the right side of the first assembly ring, and a first sealing ring fixedly installed on the right side of the assembly ring.

[0008] The second connector has a second assembly ring fixedly installed at one end near the first connector. The second assembly ring has an external threaded tube that is threadedly connected to a hexagonal nut fixedly installed at one end near the first connector. A second sealing ring is fixedly installed at the end of the external threaded tube.

[0009] A fastening mechanism is provided between the hexagonal nut and the second assembly ring.

[0010] As a preferred technical solution, the fastening mechanism includes a displacement ring, an annular groove is formed around the inside of the hexagonal nut, the displacement ring is slidably assembled inside the annular groove, an installation ring is fixedly installed on the right side of the displacement ring, an assembly ring block is fixedly installed on the left side of the displacement ring, a first inclined surface is formed on the side of the assembly ring block near the displacement ring, and several springs are arranged around the side of the assembly ring block away from the displacement ring. One end of each spring is fixedly connected to the inner wall of the annular groove. Two locking blocks are fixedly installed on the right side of the installation ring in a front-to-back arrangement. Several locking grooves are formed around the second assembly ring near the hexagonal nut, and one end of each of the two locking blocks extends out of the hexagonal nut and connects to two of the locking grooves.

[0011] The hexagonal nut has six connecting grooves that are evenly distributed around its periphery and communicate with the annular groove. Each of the six connecting grooves has a pressing component that is slidably installed inside it, and one end of each of the six pressing components abuts against the first inclined surface.

[0012] As a preferred technical solution, the pressing component includes a slider, which is slidably assembled inside the connecting groove. A limit block is fixedly installed on the side of the slider near the assembly ring block, with one end of the limit block abutting against the first inclined surface. A pressing block is fixedly installed on the side of the slider away from the assembly ring block.

[0013] As a preferred technical solution, both locking blocks have a second inclined surface on the side facing the tightening direction of the hexagonal nut.

[0014] The beneficial effects of this utility model are:

[0015] 1. High ease of operation and reduced operational difficulty: During assembly, there is no need to adjust the sealing components and fastening structure separately. Simply rotate the hexagonal nut to simultaneously achieve joint mating and sealing. The operation of controlling the retraction of the locking block by pressing the block is simple, and staff can get started without complicated training. Even without pressing the pressing block, the second inclined surface of the locking block can smoothly complete the tightening of the hexagonal nut, further simplifying the operation process.

[0016] 2. High fastening reliability, avoiding the risk of loosening: In the fastened state, the non-sloping side of the locking block fits tightly against the inner wall of the locking groove, which can effectively prevent the hexagonal nut from rotating in the opposite direction and loosening, and is suitable for vibration and pressure fluctuation scenarios in the long-term use of hydraulic systems; at the same time, the design of the second slope does not affect the tightening operation, and can maintain the smoothness of the structural fit during fine adjustment, taking into account both easy tightening and anti-loosening requirements. Attached Figure Description

[0017] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0019] Figure 2This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the assembly of the first connector and the hexagonal nut of this utility model;

[0021] Figure 4 This is a schematic diagram of the fastening mechanism structure of this utility model;

[0022] Figure 5 This is a partial cross-sectional structural diagram of the present invention;

[0023] Figure 6 This is a schematic diagram of the assembly of the second connector and the external threaded pipe of this utility model.

[0024] Reference numerals: First connector 1, First assembly ring 11, Hex nut 12, First sealing ring 13, Second connector 2, Second assembly ring 21, External threaded pipe 22, Second sealing ring 23, Displacement ring 3, Annular groove 31, Mounting ring 32, Assembly ring block 33, First inclined surface 34, Spring 35, Locking block 36, Second inclined surface 361, Locking groove 37, Connecting groove 38, Slider 4, Limiting block 41, Pressing block 42. Detailed Implementation

[0025] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1-6 As shown, this utility model provides a hydraulic pipe fitting, comprising:

[0027] First connector 1, first assembly ring 11 is fixedly installed on the right end of first connector 1, hexagonal nut 12 is rotatably assembled on the right side of first assembly ring 11, and first sealing ring 13 is fixedly installed on the right side of assembly ring 11.

[0028] The second connector 2 has a second assembly ring 21 fixedly installed at one end of the second connector 2 near the first connector 1. The second assembly ring 21 has an external threaded tube 22 that is threadedly connected to the hexagonal nut 12 fixedly installed at one end of the second assembly ring 21 near the first connector 1. The end of the external threaded tube 22 has a second sealing ring 23 fixedly installed.

[0029] A fastening mechanism is provided between the hexagonal nut 12 and the second assembly ring 21.

[0030] When assembling hydraulic pipes, the operator first confirms the alignment of the first connector 1 and the second connector 2, then rotates the hexagonal nut 12 on the right side of the first assembly ring 11. The hexagonal nut 12 engages with the external threaded tube 22 on the second assembly ring 21, simultaneously bringing the first connector 1 and the second connector 2 closer together. This causes the first sealing ring 13 and the second sealing ring 23 to fit tightly together, forming a seal and completing the connection of the two connectors. This eliminates the need for the operator to adjust the sealing components and connection structure separately, simplifying the assembly process and reducing operational complexity. After the hexagonal nut 12 is tightened, the first... The relative positions of connector 1 and second connector 2 are stably locked, and the sealing state of the sealing ring remains reliable. When maintenance of the hydraulic pipe connector is required, the first connector 1 and the second connector 2 can be directly separated after the hexagonal nut 12 is rotated in the opposite direction to release the threaded fixation. The hexagonal nut 12 is always rotated and mounted on the first assembly ring 11 and is not easy to fall off. This makes it convenient for the staff to inspect or replace the sealing ring, external threaded pipe and other components. The fastening mechanism can further strengthen the connection between the hexagonal nut 12 and the second assembly ring 21, and prevent the connection failure caused by the loosening of the hexagonal nut 12 under long-term use.

[0031] The fastening mechanism includes a displacement ring 3, an annular groove 31 is formed around the inside of a hexagonal nut 12, the displacement ring 3 is slidably assembled inside the annular groove 31, an installation ring 32 is fixedly installed on the right side of the displacement ring 3, an assembly ring block 33 is fixedly installed on the left side of the displacement ring 3, a first inclined surface 34 is formed on the side of the assembly ring block 33 near the displacement ring 3, and several springs 35 are arranged around the side of the assembly ring block 33 away from the displacement ring 3. One end of each spring 35 is fixedly connected to the inner wall of the annular groove 31. Two locking blocks 36 are fixedly installed on the right side of the installation ring 32 in a front-to-back arrangement. Several locking grooves 37 are formed around the side of the second assembly ring 21 near the hexagonal nut 12, and one end of each of the two locking blocks 36 extends out of the hexagonal nut 12 and connects to two of the locking grooves 37.

[0032] The hexagonal nut 12 has six connecting grooves 38 that are evenly distributed around its periphery and communicate with the annular groove 31. Each of the six connecting grooves 38 has a pressing component that is slidably installed inside it, and one end of each of the six pressing components abuts against the first inclined surface 34.

[0033] In the initial state, under the action of several springs 35, the first inclined plane 34 pushes the pressing component out of the connecting groove 38. When the operator tightens the hexagonal nut 12, two of the pressing components on the peripheral surface of the hexagonal nut 12 are pressed with a tightening tool. The pressing component is pressed into the connecting groove 38. The pressing component moves from high to low on the first inclined plane 34, which in turn pushes the assembly ring block 33 to move. The assembly ring block 33 drives the displacement ring 3 to move, so that the two locking blocks 36 retract into the annular groove 31. This does not affect the tightening and fixing between the hexagonal nut 12 and the external threaded tube 22. After the first sealing ring 13 and the second sealing ring 23 are tightly sealed, the operator releases the pressing component. The springs 35 return to their original position and push the two locking blocks 36 to connect and lock with two of the locking grooves 37. In this way, the hexagonal nut 12 can be prevented from rotating in the opposite direction and loosening during subsequent use, thus improving the connection stability.

[0034] The pressing assembly includes a slider 4, which is slidably mounted inside the connecting groove 38. A limiting block 41 is fixedly installed on the side of the slider 4 near the assembly ring block 33, with one end of the limiting block 41 abutting against the first inclined surface 34. A pressing block 42 is fixedly installed on the side of the slider 4 away from the assembly ring block 33. In use, the operator only needs to press the pressing block 42, which will drive the slider 4 to move down. The limiting block 41 presses against the first inclined surface 34 of the assembly ring block 33, thereby pushing the position of the assembly ring block 33. The operation is simple and convenient.

[0035] Both locking blocks 36 have a second inclined surface 361 on the side facing the tightening direction of the hexagonal nut 12. In use, when rotating towards the tightening direction of the hexagonal nut 12, the second inclined surface 361 ensures that the tightening of the hexagonal nut is not affected even if the pressing block 42 is not pressed. The thrust generated by the second inclined surface 361 can push the displacement ring 3 to move, making the tightening smoother. The non-inclined side of the two locking blocks 36 fits against the inner wall of the locking groove 37, which can prevent the hexagonal nut 12 from rotating in the opposite direction and loosening, thus improving the fastening effect.

[0036] The device is used as follows:

[0037] In the initial state, several springs 35 in the fastening mechanism are in a naturally relaxed state, pushing the assembly ring block 33 and the connected displacement ring 3 to move to the right, causing the two locking blocks 36 on the mounting ring 32 to partially extend out of the hexagonal nut 12; in the pressing assembly, the slider 4 and the pressing block 42 partially extend out of the connecting groove 38 under the support of the first inclined surface 34, and the limiting block 41 always abuts against the first inclined surface 34; the first connector 1 and the second connector 2 are in a separated state, the first sealing ring 13 and the second sealing ring 23 are fixed in the corresponding positions, and the external threaded tube 22 is not threaded with the hexagonal nut 12.

[0038] When assembling hydraulic pipe fittings, the workers first align the first fitting 1 with the second fitting 2, so that the external threaded pipe 22 is aligned with the hexagonal nut 12.

[0039] If the hexagonal nut 12 is turned directly in the tightening direction, the second inclined surface 361 of the locking block 36 facing the tightening direction will press against the surface of the second assembly ring 21. The thrust will drive the displacement ring 3 to move to the left against the elastic force of the spring 35, causing the locking block 36 to retract into the annular groove 31, without obstructing the threaded engagement between the hexagonal nut 12 and the external threaded tube 22. If a smoother tightening is required, the operator can press any two pressing blocks 42, causing the slider 4 and the limiting block 41 to slide along the connecting groove 38. The limiting block 41 moves from high to low along the first inclined surface 34, pushing the assembly ring block 33 to the left and compressing the spring 35, simultaneously causing the locking block 36 to retract. Then, turning the hexagonal nut 12 will achieve the tightening with the external threaded tube 22.

[0040] As the hexagonal nut 12 is tightened, the first connector 1 and the second connector 2 move closer to each other until the first sealing ring 13 and the second sealing ring 23 fit tightly together to form a seal. At this time, the operator releases the pressing block 42, the spring 35 returns to its original position and pushes the displacement ring 3 to the right, so that the two locking blocks 36 extend out and are inserted into the corresponding locking grooves 37 of the second assembly ring 21, thus completing the fastening.

[0041] When fastening and preventing loosening, the non-sloping side of the locking block 36 fits tightly against the inner wall of the locking groove 37, which can prevent the hexagonal nut 12 from rotating in the opposite direction and loosening.

[0042] When maintenance is required on the hydraulic pipe joint, the operator presses any two pressing blocks 42, which pushes the assembly ring block 33 to the left through the slider 4 and the limit block 41, causing the locking block 36 to disengage from the locking groove 37 and retract into the annular groove 31. Then, the hexagonal nut 12 is rotated in the opposite direction to release the threaded engagement with the external threaded pipe 22, thereby separating the first joint 1 and the second joint 2. The sealing ring, external threaded pipe and other components can then be inspected or replaced. The hexagonal nut 12 is always rotated and assembled on the first assembly ring 11 and will not fall off or be lost. After maintenance, it can be directly re-aligned and assembled.

[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A hydraulic pipe fitting, characterized in that: include The first connector (1) has a first assembly ring (11) fixedly installed on the right end of the first connector (1), and a hexagonal nut (12) is rotatably assembled on the right side of the first assembly ring (11). The first sealing ring (13) is fixedly installed on the right side of the assembly ring (11). The second connector (2) has a second assembly ring (21) fixedly installed at one end near the first connector (1). The second assembly ring (21) has an external threaded tube (22) that is threaded to the hexagonal nut (12) fixedly installed at one end near the first connector (1). The end of the external threaded tube (22) has a second sealing ring (23) fixedly installed. A fastening mechanism is provided between the hexagonal nut (12) and the second assembly ring (21).

2. A hydraulic pipe fitting according to claim 1, characterized in that: The fastening mechanism includes a displacement ring (3), an annular groove (31) is provided around the inside of the hexagonal nut (12), the displacement ring (3) is slidably assembled inside the annular groove (31), an installation ring (32) is fixedly installed on the right side of the displacement ring (3), an assembly ring block (33) is fixedly installed on the left side of the displacement ring (3), a first inclined surface (34) is provided on the side of the assembly ring block (33) near the displacement ring (3), and several springs (35) are arranged around the side of the assembly ring block (33) away from the displacement ring (3). One end of the several springs (35) is fixedly connected to the inner wall of the annular groove (31) respectively. Two locking blocks (36) are fixedly installed on the right side of the installation ring (32) in a front-back distribution. Several locking grooves (37) are arranged around the side of the second assembly ring (21) near the hexagonal nut (12). One end of the two locking blocks (36) extends out of the hexagonal nut (12) and is connected to two of the locking grooves (37). The hexagonal nut (12) has six connecting grooves (38) that are connected to the annular groove (31) evenly around its periphery. Each of the six connecting grooves (38) has a pressing component that is slidably installed inside. One end of each of the six pressing components abuts against the first inclined surface (34).

3. A hydraulic pipe fitting according to claim 2, characterized in that: The pressing component includes a slider (4), which is slidably assembled inside the connecting groove (38). A limiting block (41) is fixedly installed on the side of the slider (4) near the assembly ring block (33). One end of the limiting block (41) abuts against the first inclined surface (34). A pressing block (42) is fixedly installed on the side of the slider (4) away from the assembly ring block (33).

4. A hydraulic pipe fitting according to claim 3, characterized in that: Both locking blocks (36) have a second inclined surface (361) on the side facing the tightening direction of the hexagonal nut (12).

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