Hydraulic transition joint of engineering machinery

Abstract

The utility model discloses a hydraulic transition joint for engineering machinery, which belongs to the technical field of hydraulic equipment and comprises a female joint and a male joint, external threads are arranged on the outer wall of the male joint, a connecting thread sleeve matched with the external threads is movably mounted on the outer side of the female joint, and a first sealing plate is slidably mounted on the inner side of the male joint. A first spring connected to the inner wall of the male connector is arranged on one side of the first sealing plate, an ejector rod is fixedly connected to the middle of the male connector, a through hole located in the outer side of the ejector rod is formed in the middle of the first sealing plate, a second sealing plate is slidably installed on the inner side of the female connector, and a second spring connected to the inner wall of the female connector is arranged on one side of the second sealing plate. And an annular hole is formed in the second sealing plate. Through the arrangement of the first sealing plate, the first spring, the second sealing plate and the second spring, the female connector and the male connector are separated when the oil-water separator is not used, the first sealing plate seals the male connector under the action of the first spring, the second sealing plate seals the female connector under the action of the second spring, and oil leakage is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hydraulic devices, in particular to a kind of engineering machinery hydraulic transition joint, belong to hydraulic equipment technical field. BACKGROUND

[0002] Pipe joint is the part of connecting pipeline or installing pipeline on hydraulic element in hydraulic system, is the connecting point between component and pipe, plays an indispensable important role in pipe fitting, it is one of main components of hydraulic pipeline.Pipe joint has a variety of types, commonly used pipe joint can be divided into hard pipe joint and hose joint two kinds.If according to the connecting mode of pipe joint and pipe, hard pipe joint has three kinds of flared type, sleeve type and welding type, and hose joint is mainly buckling type rubber pipe joint, and more pipe joints are needed in the hydraulic system of engineering machinery, and some pipes are overjoint for the convenience of installation and disassembly, but the existing overjoint is inconvenient to install and disassemble, and the sealing performance after installation is poor, cannot meet existing demand, a kind of engineering machinery hydraulic transition joint is disclosed in the invention patent with the application number CN202010309732.4, by setting up female joint and male joint two joint cooperation, the connection and separation of engineering machinery hydraulic system pipeline are facilitated, the sealing performance is improved, the safety is improved, and valve core is arranged in female joint body, when male joint is separated from female joint, female joint can be self-closed, to prevent liquid leakage.

[0003] But the male joint of the device cannot be self-closed, and liquid leakage still occurs.

[0004] Therefore, the utility model provides a new solution. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to solve the deficiency of prior art, and provide a kind of engineering machinery hydraulic transition joint.

[0006] The purpose of the utility model can be achieved by adopting the following technical scheme:

[0007] The utility model provides an engineering machinery hydraulic transition joint, including female joint and male joint, the female joint is inserted in the inside of male joint, and the mutual faraway one end of female joint and male joint is fixedly connected with the connecting pipe, the outer wall of male joint is equipped with the outer thread, and the outside of female joint is movably installed with the connecting screw bushing matched with the outer thread, the inside of male joint is slidably installed with the first sealing plate, one side of first sealing plate is equipped with the first spring connected on the inner wall of male joint, the middle part of male joint is fixedly connected with the top rod, the middle part of first sealing plate is equipped with the through -hole located the outside of top rod, the inside of female joint is slidably installed with the second sealing plate, one side of second sealing plate is equipped with the second spring connected on the inner wall of female joint, and the annular hole is set up on the second sealing plate.

[0008] Preferably, the end of the female joint close to the male joint is fixedly connected with a first annular plate, and the inner diameter of the annular hole is larger than the inner diameter of the first annular plate.

[0009] Preferably, the sidewall of the second sealing plate is fixedly connected with a plug block located in the middle of the first annular plate.

[0010] Preferably, a first sealing ring is arranged between the second sealing plate and the first annular plate.

[0011] Preferably, the end of the male joint close to the female joint is fixedly connected with a second annular plate, and the end of the top rod close to the female joint is fixedly connected with a top plate.

[0012] Preferably, a second sealing ring is arranged between the first sealing plate and the second annular plate, and a third sealing ring is arranged between the first sealing plate and the top plate.

[0013] Preferably, a fixed rod connected with the top rod is fixedly connected to the inside of the male joint.

[0014] Preferably, a first hexagonal block is fixedly connected to one end of the connecting screw bushing, and a second hexagonal block is fixedly connected to one end of the male joint.

[0015] Preferably, a plurality of support blocks are uniformly arranged on the inside of the annular hole.

[0016] Preferably, a wear-resistant layer is arranged on the inner wall of the female joint and the male joint.

[0017] The utility model discloses an advantageous technical effect: according to the engineering machinery hydraulic transition joint of the utility model, through being provided with first sealing plate, first spring, jib, through -hole, second sealing plate, second spring and annular hole, in the splicing female joint and male joint, female joint abuts first sealing plate and compresses first spring, simultaneously jib abuts second sealing plate, compresses second spring, completes the splicing, and two connecting pipes are interconnected with through -hole and annular hole to be able to supply oil, and when not using, split female joint and male joint, first sealing plate is sealed male joint under the action of first spring, and second sealing plate is sealed female joint under the action of second spring, prevent oil leakage, through the setting of external thread and connecting screw sleeve, the connection and separation of engineering machinery hydraulic system pipeline are convenient, improve sealing performance, and when using, female joint and male joint do not need relative rotation to improve safety. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure cross section view of a preferred embodiment provided according to the utility model;

[0019] Figure 2 It is the overall structure schematic diagram of a preferred embodiment provided according to the utility model;

[0020] Figure 3 It is the female joint structure schematic diagram of a preferred embodiment provided according to the utility model;

[0021] Figure 4 It is the second sealing plate structure schematic diagram of a preferred embodiment provided according to the utility model;

[0022] Figure 5 It is the male joint structure schematic diagram of a preferred embodiment provided according to the utility model;

[0023] Figure 6 It is the first sealing plate structure schematic diagram of a preferred embodiment provided according to the utility model.

[0024] In the drawing: 1, female joint;2, male joint;3, connecting pipe;4, external thread;5, connecting screw sleeve;6, first sealing plate;7, first spring;8, jib;9, through -hole;10, second sealing plate;11, second spring;12, annular hole;13, first annular plate;14, plug;15, first sealing ring;16, second annular plate;17, top plate;18, second sealing ring;19, third sealing ring;20, fixed rod;21, first hexagonal block;22, second hexagonal block;23, support block. DETAILED DESCRIPTION

[0025] In order to make the technical staff in the art more clear and definite the technical scheme of the utility model, the utility model is described in further detail below in conjunction with examples and drawings, but the implementation of the utility model is not limited to this.

[0026] As Figures 1-6 shown, the engineering machinery hydraulic transition joint provided by the embodiment comprises a female joint 1 and a male joint 2, the female joint 1 is inserted into the inside of the male joint 2, the ends away from each other of the female joint 1 and the male joint 2 are fixedly connected with connecting pipes 3, an outer thread 4 is arranged on the outer wall of the male joint 2, a connecting sleeve 5 matched with the outer thread 4 is movably arranged on the outside of the female joint 1, a first sealing plate 6 is slidably arranged on the inside of the male joint 2, a first spring 7 connected with the inner wall of the male joint 2 is arranged on one side of the first sealing plate 6, a top rod 8 is fixedly connected with the middle part of the male joint 2, a through hole 9 located on the outside of the top rod 8 is arranged in the middle part of the first sealing plate 6, a second sealing plate 10 is slidably arranged on the inside of the female joint 1, a second spring 11 connected with the inner wall of the female joint 1 is arranged on one side of the second sealing plate 10, and an annular hole 12 is arranged on the second sealing plate 10. Through the arrangement of the first sealing plate 6, the first spring 7, the top rod 8, the through hole 9, the second sealing plate 10, the second spring 11 and the annular hole 12, when the female joint 1 and the male joint 2 are inserted, the female joint 1 abuts against the first sealing plate 6 to compress the first spring 7, at the same time, the top rod 8 abuts against the second sealing plate 10 to compress the second spring 11, after the insertion is completed, the two connecting pipes 3 are communicated with the through hole 9 and the annular hole 12, so that oil can be supplied, when not in use, the female joint 1 and the male joint 2 are disassembled, the first sealing plate 6 is sealed to the male joint 2 under the action of the first spring 7, and the second sealing plate 10 is sealed to the female joint 1 under the action of the second spring 11, so as to prevent oil leakage, through the arrangement of the outer thread 4 and the connecting sleeve 5, the connection and separation of the engineering machinery hydraulic system pipeline are facilitated, the sealing performance is improved, and when in use, the female joint 1 and the male joint 2 do not need to be relatively rotated, so as to improve the safety.

[0027] In the embodiment, as Figure 1 , Figure 3 and Figure 4 shown, the end close to the male joint 2 of the female joint 1 is fixedly connected with a first annular plate 13, the inner diameter of the annular hole 12 is greater than the inner diameter of the first annular plate 13, a plug 14 located in the middle part of the first annular plate 13 is fixedly connected with the side wall of the second sealing plate 10, and a first sealing ring 15 is arranged between the second sealing plate 10 and the first annular plate 13. Through the arrangement of the first annular plate 13, the first sealing ring 15 and the plug 14, the sealing efficiency is improved.

[0028] In the embodiment, as Figure 1 , Figure 5 and Figure 6As shown, the end of the male joint 2 close to the female joint 1 is fixedly connected with a second annular plate 16, the end of the top rod 8 close to the female joint 1 is fixedly connected with a top plate 17, the first sealing plate 6 and the second annular plate 16 are provided with a second sealing ring 18, the first sealing plate 6 and the top plate 17 are provided with a third sealing ring 19, the inner side of the male joint 2 is fixedly connected with a fixed rod 20 connected with the top rod 8. Through the setting of the second annular plate 16, the top plate 17, the second sealing ring 18 and the third sealing ring 19, the sealing efficiency is improved.

[0029] In this embodiment, as shown in Figure 1 、 Figure 2 and Figure 3 , one end of the connecting screw sleeve 5 is fixedly connected with a first hexagonal wrench block 21, one end of the male joint 2 is fixedly connected with a second hexagonal wrench block 22, the inner side of the annular hole 12 is uniformly provided with a plurality of supporting blocks 23, and the inner walls of the female joint 1 and the male joint 2 are both provided with wear-resistant layers. Through the setting of the first hexagonal wrench block 21 and the second hexagonal wrench block 22, the wrench can be used to tighten or loosen, improving the disassembly and assembly efficiency, and through the setting of the wear-resistant layer, the service life is improved.

[0030] In this embodiment, as shown in Figures 1-6 , the working process of the engineering machinery hydraulic transition joint provided in this embodiment is as follows:

[0031] When connection is needed, the female joint 1 is inserted into the male joint 2, the female joint 1 abuts against the first sealing plate 6 to compress the first spring 7, at the same time, the top rod 8 abuts against the second sealing plate 10 to compress the second spring 11, after the insertion is completed, the two connecting pipes 3 are communicated with the through hole 9 and the annular hole 12, so that oil can be supplied, and then the connecting screw sleeve 5 is rotated to be connected and fixed with the external thread 4.

[0032] When disassembly is needed, the connecting screw sleeve 5 is reversed, the connecting screw sleeve 5 is removed, the first sealing plate 6 seals the male joint 2 under the action of the first spring 7, and the second sealing plate 10 seals the female joint 1 under the action of the second spring 11, so as to prevent oil leakage.

[0033] The above is only a further embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the scope disclosed by the present application, which belongs to the protection scope of the present application.

Claims

1. An engineering machine hydraulic transition joint, comprising a female joint (1) and a male joint (2), the female joint (1) is inserted inside the male joint (2), the female joint (1) and the male joint (2) are fixedly connected with a connecting pipe (3) at the end away from each other, characterized in that, The outer wall of the male joint (2) is provided with external threads (4), the outer side of the female joint (1) is movably provided with a connecting sleeve (5) matched with the external threads (4), the inner side of the male joint (2) is slidably provided with a first sealing plate (6), one side of the first sealing plate (6) is provided with a first spring (7) connected to the inner wall of the male joint (2), the middle part of the male joint (2) is fixedly connected with a top rod (8), the middle part of the first sealing plate (6) is provided with a through hole (9) located outside the top rod (8), the inner side of the female joint (1) is slidably provided with a second sealing plate (10), one side of the second sealing plate (10) is provided with a second spring (11) connected to the inner wall of the female joint (1), and the second sealing plate (10) is provided with an annular hole (12).

2. A hydraulic transition coupling for an engineering machine according to claim 1, characterised in that, The end of the female joint (1) close to the male joint (2) is fixedly connected with a first annular plate (13), and the inner diameter of the annular hole (12) is greater than the inner diameter of the first annular plate (13).

3. An engineering machine hydraulic transition coupling as claimed in claim 2, characterised in that, The side wall of the second sealing plate (10) is fixedly connected with a plug block (14) located in the middle part of the first annular plate (13).

4. An engineering machine hydraulic transition coupling as claimed in claim 3, characterised in that, The first sealing ring (15) is arranged between the second sealing plate (10) and the first annular plate (13).

5. The hydraulic transition fitting for an engineering machine according to claim 1, wherein, The end of the male joint (2) close to the female joint (1) is fixedly connected with a second annular plate (16), and the end of the top rod (8) close to the female joint (1) is fixedly connected with a top plate (17).

6. An engineering machine hydraulic transition coupling as claimed in claim 5, characterised in that, The second sealing ring (18) is arranged between the first sealing plate (6) and the second annular plate (16), and the third sealing ring (19) is arranged between the first sealing plate (6) and the top plate (17).

7. The hydraulic transition fitting for an engineering machine of claim 1, wherein, The inner side of the male joint (2) is fixedly connected with a fixed rod (20) connected with the top rod (8).

8. The hydraulic transition fitting for an engineering machine of claim 1, wherein, One end of the connecting sleeve (5) is fixedly connected with a first hexagonal block (21), and one end of the male joint (2) is fixedly connected with a second hexagonal block (22).

9. The hydraulic transition coupling for an engineering machine of claim 1, wherein, The inner side of the annular hole (12) is uniformly provided with a plurality of support blocks (23).

10. The hydraulic transition fitting for an earthmoving machine of claim 1, wherein, The inner walls of the female joint (1) and the male joint (2) are both provided with wear-resistant layers.

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