Flexible connecting pipe assembly and hydraulic system

Abstract

The utility model provides a flexible connecting pipe assembly and a hydraulic system. The flexible connecting pipe assembly is used for being connected with two oil ports in a hydraulic system and comprises two connectors, each connector is provided with a first end and a second end which are opposite to each other, the first ends of the two connectors are connected with the two oil ports in a sealed mode respectively, and a first medium channel is formed in each connector; the two ends of the connecting pipe are connected with the second ends of the two connectors respectively, and a second medium channel is formed in the connecting pipe and communicates with the first medium channel; the two ends of the connecting pipe are connected with the second end of the connector in the mode that an end hole is matched with a spherical end, and the sealing mode of the end hole and the spherical end is radial sealing. The utility model is used for overcoming the defects of large installation space, high manufacturing process, poor shock resistance and the like existing in buckling hoses, hard pipes and metal corrugated pipes.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pipe technology, and in particular to a flexible connecting pipe assembly and hydraulic system. Background Technology

[0002] In recent years, with the rapid development of the real economy, hydraulic systems have played an increasingly important role in industrial development. Lubrication and cooling systems, as a crucial component of hydraulic systems, are essential for maintaining the long-term normal operation of mechanical transmission systems. Currently, lubrication and cooling systems mostly use crimped hoses, rigid hoses, and metal bellows to transmit the working medium. Crimped hoses require sufficient space for installation, have strict requirements on the bending radius, and suffer from disadvantages such as high cost and short lifespan. Rigid hoses have high requirements for manufacturing processes; even slight errors can prevent installation, and they have poor vibration resistance. Metal bellows have low pressure resistance, poor vibration resistance, and high cost. In confined spaces, their ability to correct deviations is weak, and under conditions of high vibration, fretting wear between the bellows body and the outer mesh sleeve can easily occur, leading to pipe wall penetration, leakage, and failure. Utility Model Content

[0003] The purpose of this utility model is to provide a flexible connecting pipe assembly and hydraulic system to overcome the defects of crimped hoses, rigid pipes and metal corrugated pipes, such as large installation space, high manufacturing process and poor shock resistance.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A flexible connecting pipe assembly for connecting two oil ports in a hydraulic system, comprising:

[0006] Two connectors, each connector having a first end and a second end opposite to each other, the first ends of the two connectors being respectively sealed and connected to the two oil ports, and each connector having a first medium channel inside;

[0007] A connecting tube, the two ends of which are respectively connected to the second ends of the two connectors, and the connecting tube has a second medium channel that communicates with the first medium channel;

[0008] The two ends of the connecting pipe are connected to the second end of the connector by means of end holes and spherical end heads, and the sealing method of the end holes and the spherical end heads is radial sealing.

[0009] Optionally, the second end of the connector is provided with an end hole, and both ends of the connecting tube are spherical surfaces that match the end hole. The two ends of the connecting tube are respectively inserted into the end holes of the second ends of the two connectors.

[0010] Optionally, the connecting pipe has end holes at both ends, and the second end of the connector is a spherical surface that matches the end hole. The second ends of the two connectors are respectively inserted into the end holes at both ends of the connecting pipe.

[0011] Optionally, there is a certain gap between the spherical end and the bottom of the end hole, and the spherical surface of the spherical end is tangent to the wall of the end hole.

[0012] Optionally, a first sealing ring groove is provided at the spherical end, and the first sealing ring is installed in the first sealing ring groove.

[0013] Optionally, the midpoint plane of the first sealing ring groove along the groove width direction passes through the center of the spherical end.

[0014] Optionally, the first end of the connector is provided with a second sealing ring groove, and the second sealing ring is installed in the second sealing ring groove.

[0015] Optionally, the first end of the connector is connected to the oil port by a fastener, or the first end of the connector is inserted into the oil port and threaded.

[0016] Optionally, the joint and the connecting pipe are made of carbon steel, stainless steel or aluminum alloy.

[0017] A hydraulic system that uses a flexible connecting pipe assembly as described above to connect two oil ports.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The flexible connecting pipe assembly provided by this utility model has a simple structure, requiring only the development and manufacturing of two parts. The seals and fasteners use commonly available standard parts, resulting in low cost. Manufacturing and installation are convenient, requiring no special equipment such as hose assembly crimping machines, corrugated pipe roll forming machines, or dedicated seam welding machines. Common medium-precision lathes or CNC lathes are sufficient for processing, resulting in a simple process, high processing efficiency, and low processing costs. It can be used in various working conditions, and the size of the joints, connecting pipes, and sealing rings can be changed according to requirements. The oil ports at both ends of the equipment can be of different flange types, threaded types, or a combination of both, allowing for oil port connections of different sizes and distances, making it highly practical. Especially in situations where space is limited and conventional hose assemblies, rigid pipe assemblies, or metal corrugated pipe assemblies are difficult to manufacture and install, the flexible connecting pipe assembly of this utility model has significant advantages.

[0020] The flexible connecting pipe assembly provided by this utility model has a certain adjustment range in both axial and radial directions. It uses a standard sealing ring for reliable sealing and can meet the needs of different working pressure ranges by selecting different materials. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings in the following description are one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0022] Figure 1 A flexible connecting pipe structure diagram is provided for the first embodiment of this utility model, wherein a flange joint is adopted and the two oil ports are coaxial;

[0023] Figure 2 A flexible connecting pipe structure diagram is provided for the second embodiment of this utility model, wherein a flange joint is used and the two oil ports are not coaxial;

[0024] Figure 3 A schematic diagram of a flexible connecting pipe structure provided in the third embodiment of this utility model, wherein a flange joint is used and the two oil ports have a spatial angle;

[0025] Figure 4 A flexible connecting pipe structure diagram is provided for the fourth embodiment of this utility model, wherein a flange joint is adopted and the joint has a spherical surface;

[0026] Figure 5 A flexible connecting pipe structure diagram is provided for the fifth embodiment of this utility model, wherein a flange joint is adopted and the joint has a spherical surface and the two oil ports have a spatial angle;

[0027] Figure 6 A flexible connecting pipe structure diagram is provided for the sixth embodiment of this utility model, wherein a threaded joint is used and the connecting pipe has a spherical surface;

[0028] Figure 7 A flexible connecting pipe structure diagram is provided for the seventh embodiment of this utility model, wherein a threaded joint is used and the joint has a spherical surface;

[0029] Figure 8 The eighth embodiment of this utility model provides a flexible connecting pipe structure diagram, wherein a threaded joint is used, the connecting pipe has a spherical surface, and the two oil ports have a spatial angle;

[0030] Figure 9 This is a structural diagram of a flexible connecting pipe provided in the ninth embodiment of the present utility model, wherein a threaded joint is used and the joint has a spherical surface and the two oil ports have a spatial angle.

[0031] The reference numerals in the figure are as follows: 1-Connector, 2-Second sealing ring, 3-First sealing ring, 4-Connecting pipe, 5-Fastener, 11-Hex nut. Detailed Implementation

[0032] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the proposed solution of this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clearly illustrate the embodiments of this utility model. Please refer to the drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0033] Combination Figures 1-9 As shown, one embodiment of this utility model provides a flexible connecting pipe assembly for connecting two oil ports (the two oil ports are a medium inlet and a medium outlet, respectively) in a hydraulic system. Specifically, the flexible connecting pipe assembly includes: two connectors 1, each connector having a first end and a second end opposite to each other (according to...). Figure 1 The end of the connector 1 connected to the oil port of the equipment is defined as the first end, and the end connected to the connecting pipe 4 is defined as the second end. The first ends of the two connectors 1 are respectively sealed to the two oil ports. The connector 1 has a first medium channel. The connecting pipe 4 has its two ends connected to the second ends of the two connectors 1 respectively. The connecting pipe 4 has a second medium channel and communicates with the first medium channel. The two ends of the connecting pipe 4 are connected to the second ends of the connectors 1 in the form of end holes and spherical ends, and the sealing method of the end holes and the spherical ends is radial sealing.

[0034] In this embodiment, the first ends of the two connectors 1 are respectively sealed and connected to the two oil ports. A connecting pipe 4 is provided between the two connectors 1. The medium can flow from one oil port into the first medium channel of one of the connectors 1, and after passing through the second medium channel of the connecting pipe 4, it flows out from the first medium channel of the other connector 1 to the other oil port.

[0035] In one embodiment, such as Figure 1 , 2 As shown in Figures 3, 6, and 8, the second ends of the two connectors 1 are provided with end holes, and both ends of the connecting tube 4 are spherical ends that match the end holes. The two ends of the connecting tube 4 are respectively inserted into the end holes of the second ends of the two connectors 1. In another embodiment, as shown... Figure 4 , 5As shown in Figures 7 and 9, the two ends of the connecting pipe 4 are provided with end holes, and the second ends of the two connectors 1 are spherical ends that match the end holes. The second ends of the two connectors 1 are respectively inserted into the end holes at both ends of the connecting pipe 4.

[0036] To prevent leakage of the medium from the connection between the connecting pipe 4 and the connector 1, a first sealing ring groove is provided at the spherical end of the connection, and a first sealing ring 3 is installed in the first sealing ring groove. Furthermore, the midpoint plane of the first sealing ring groove along its width passes through the center of the spherical end to ensure a sealing effect. Figure 1 , 2 As shown in Figures 3, 6, and 8, both ends of the connecting pipe 4 are spherical ends, and the first sealing ring groove is located at both ends of the connecting pipe 4. Figure 4 , 5 As shown in Figures 7 and 9, the second ends of the two connectors 1 are spherical ends, and the first sealing ring groove is provided at the second ends of the two connectors 1.

[0037] In this embodiment, there is a certain gap between the spherical end and the bottom of the end hole, which can be used to compensate for the axial distance error between the two oil ports. The spherical surface of the spherical end is tangent to the hole wall of the end hole, which can be used to adjust the radial error of the two oil ports not being concentric.

[0038] The axial distance error of the oil ports at both ends can be adjusted by moving the connecting pipe 4 axially between the two end joints 1, and the radial error of the oil ports at both ends can be adaptively adjusted by adjusting the relative angle between the connecting pipe 4 and the two end joints 1. Figure 1 As shown, the flexible connecting pipe assembly can meet the application scenario where the oil ports at both ends are coaxial, such as... Figure 2 , 4 As shown in Figures 6 and 7, the flexible connecting pipe assembly can meet the application scenarios where the oil ports at both ends are not aligned, such as... Figure 3 , 5 As shown in Figures 8 and 9, the flexible connecting pipe assembly can meet the application scenarios where there is a spatial angle between the oil ports at both ends.

[0039] like Figure 1 , 2 As shown in Figure 4, the connector 1 is a flange-type connector (i.e., the first end of the connector 1 has a flange structure), and the first end of the connector 1 is connected to the oil port by a fastener 5. In one embodiment, the fastener 5 may include a flange clamp, a gasket, and bolts, etc., to fix the connector 1 at the oil port. In other embodiments, the fastener may also adopt other structures, and this utility model does not limit this. Alternatively, as... Figure 6 , 7As shown in Figures 8 and 9, the connector 1 is a threaded connector. The outer wall of the first end of the connector 1 and the inner wall of the oil port are provided with matching threads. The first end of the connector 1 is inserted into the oil port, and the two are connected by threads.

[0040] like Figure 1 , 2 As shown in Figures 3, 4, and 5, the connector 1 has a T-shaped structure, with a cylindrical surface at the first end and a second sealing ring groove on the end face. The second sealing ring 2 is installed in the second sealing ring groove for sealing between the connector 1 and the oil port. Figure 6 , 7 As shown, the first end of the connector 1 has a shoulder, and a thread extends from the end face of the first end to the shoulder. A second sealing ring groove is provided at the bottom of the thread, and a second sealing ring 2 is installed in the second sealing ring groove for sealing between the connector 1 and the oil port. The connector 1 is rotated into the oil port until the shoulder presses against the second sealing ring 2 to achieve a seal between the connector 1 and the oil port. Figure 8 , 9 As shown, the first end of the connector 1 also includes a hexagonal nut 11 (in conventional connectors, the connector 1 and the hexagonal nut 11 are considered as a whole). The first end of the connector 1 has a second sealing ring groove in the middle of the thread. The second sealing ring 2 is installed in the second sealing ring groove for sealing between the connector 1 and the oil port. In practical applications, after rotating the connector 1 to the appropriate depth and angle of the oil port, the hexagonal nut 11 is rotated to press the second sealing ring 2, thereby fixing the connector 1, pressing the second sealing ring 2, and achieving the purpose of sealing between the connector 1 and the oil port.

[0041] In this embodiment, the connector 1 and the connecting pipe 4 are made of the same material. Depending on the working environment, working medium and anti-corrosion requirements, carbon steel, stainless steel or aluminum alloy can be selected. It has the advantages of high pressure resistance, small deformation, oil resistance, strong corrosion resistance, simple manufacturing, low cost and long service life.

[0042] Based on the same inventive concept, this utility model also provides a hydraulic system that uses a flexible connecting pipe assembly as described above to connect two oil ports. The two oil ports can be coaxial, non-coaxial, or at a spatial angle.

[0043] In summary, the flexible connecting pipe assembly provided by this utility model has a simple structure, requiring only the development and manufacturing of two parts. The seals and fasteners utilize commonly available standard parts, resulting in low cost. Manufacturing and installation are convenient, requiring no specialized equipment such as hose assembly crimping machines, corrugated pipe roll forming machines, or dedicated seam welding machines. Common medium-precision lathes or CNC lathes are sufficient for processing, resulting in a simple process, high efficiency, and low cost. It can be used in various working conditions, and the size of the joints, connecting pipes, and sealing rings can be changed according to requirements. The oil ports at both ends of the equipment can be of different flange types, threaded types, or a combination of both, allowing for oil port connections of different sizes and distances, making it highly practical. Especially in situations where space is limited and conventional hose assemblies, rigid pipe assemblies, or metal corrugated pipe assemblies are difficult to manufacture and install, the flexible connecting pipe of this utility model has significant advantages. The flexible connecting pipe assembly provided by this utility model has a certain adjustment range in both axial and radial directions, reliable sealing using standard sealing rings, and can meet the needs of different working pressure ranges by selecting different materials.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A flexible connecting pipe assembly, characterized in that, For connecting two oil ports in a hydraulic system, including: Two connectors, each connector having a first end and a second end opposite to each other, the first ends of the two connectors being respectively sealed and connected to the two oil ports, and each connector having a first medium channel inside; A connecting tube, the two ends of which are respectively connected to the second ends of the two connectors, and the connecting tube has a second medium channel that communicates with the first medium channel; The two ends of the connecting pipe are connected to the second end of the connector by means of end holes and spherical end heads, and the sealing method of the end holes and the spherical end heads is radial sealing.

2. The flexible connecting pipe assembly as described in claim 1, characterized in that, The second end of the connector is provided with an end hole, and both ends of the connecting tube are spherical surfaces that match the end hole. The two ends of the connecting tube are respectively inserted into the end holes of the second ends of the two connectors.

3. The flexible connecting pipe assembly as described in claim 1, characterized in that, The connecting tube has end holes at both ends, and the second end of the connector is a spherical surface that matches the end hole. The second ends of the two connectors are respectively inserted into the end holes at both ends of the connecting tube.

4. The flexible connecting pipe assembly as described in claim 1, characterized in that, There is a certain gap between the spherical end and the bottom of the end hole, and the spherical surface of the spherical end is tangent to the hole wall of the end hole.

5. The flexible connecting pipe assembly as described in claim 1, characterized in that, The spherical end is provided with a first sealing ring groove, and the first sealing ring is installed in the first sealing ring groove.

6. The flexible connecting pipe assembly as described in claim 5, characterized in that, The midpoint plane of the first sealing ring groove along the groove width direction passes through the center of the spherical end.

7. The flexible connecting pipe assembly as described in claim 1, characterized in that, The first end of the connector is provided with a second sealing ring groove, and the second sealing ring is installed in the second sealing ring groove.

8. The flexible connecting pipe assembly as described in claim 1, characterized in that, The first end of the connector is connected to the oil port by a fastener, or the first end of the connector is inserted into the oil port and threaded.

9. The flexible connecting pipe assembly as described in claim 1, characterized in that, The joint and the connecting pipe are made of carbon steel, stainless steel or aluminum alloy.

10. A hydraulic system, characterized in that, The two oil ports are connected using the flexible connecting pipe assembly as described in any one of claims 1 to 9.

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