A hydraulic pile hammer with a pipe connection

Abstract

The utility model provides a kind of piping connecting piece for hydraulic pile hammer, it is related to piping connecting technical field, including first pipeline, second pipeline, piping connecting piece main body includes: bushing, bolt connection structure, multistage sealing structure, flexible transition structure;After bushing is sleeved in the inside end of first pipeline and second pipeline, using bolt connection structure connection fixed mode, the strength of connecting place is improved, the clearance of connecting place is provided multistage sealing structure to ensure strong sealing effect, better to resist high pressure impact and vibration, and vibration is buffered by flexible transition structure, reduce the influence of vibration on multistage sealing structure, simultaneously, vibration stress is effectively released after being buffered, reduce the risk of piping fatigue fracture, improve the reliability of entire hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a pipeline connector for a hydraulic pile driver. Background Technology

[0002] The descriptions in this section provide background information relevant to this disclosure only and do not constitute prior art.

[0003] A hydraulic pile hammer is a high-efficiency construction device that uses hydraulic energy to drive a hammer core for pile driving. During its operation, the hydraulic pipeline needs to transmit high-frequency, high-pressure, and high-flow-rate hydraulic oil, and withstand severe impacts and vibrations.

[0004] In existing hydraulic pile hammers, ordinary O-rings are prone to "extrusion" damage under high pressure impact and vibration, or seal failure due to fretting wear of the contact surface; rigidly connected pipelines are prone to fatigue stress concentration at the root of the joint under vibration, leading to cracking of the pipeline or joint. Utility Model Content

[0005] The purpose of this utility model is to provide a pipe connector for a hydraulic pile driver, which has the advantages of improving the connection strength between pipes, enhancing the sealing effect, and buffering vibration to reduce the pressure on the sealing and pipe connection. It solves the technical problems of ordinary O-rings in existing hydraulic pile driver pipe connectors being prone to "extrusion" damage under high pressure impact and vibration, or sealing failure due to fretting wear of the contact surface; and rigidly connected pipes being prone to fatigue stress concentration at the root of the joint under vibration, leading to cracking of the pipe or joint.

[0006] This utility model provides a pipeline connector for a hydraulic pile hammer, including a first pipe and a second pipe connected to the oil port of the hydraulic pile hammer body, and a pipeline connector body, the two ends of which are coaxially fixedly connected to the inner ends of the first pipe and the second pipe respectively.

[0007] The main body of the pipeline connector includes:

[0008] The sleeve has retaining rings integrally formed on the inner annular surfaces at both ends;

[0009] The inner ends of the first and second pipes pass through the retaining ring on the same side of the sleeve;

[0010] A bolted connection structure is assembled between the outer wall of the inner end of the first and second pipes located on the outer side of the sleeve and the outer wall of the sleeve on the same side.

[0011] A multi-stage sealing structure is assembled between the outer wall of the inner end of the first and second pipes located on the inner side of the sleeve and the inner wall of the sleeve on the same side.

[0012] A flexible transition structure is assembled in the middle of the sleeve.

[0013] As a further optimization, in order to connect and fix the sleeve to the inner ends of the first and second pipes, the bolt connection structure includes:

[0014] The first connecting flange is fixedly sleeved on the left and right edges of the outer wall of the sleeve;

[0015] The second connecting flange is fixedly sleeved on the inner end of the outer wall of the first and second pipes;

[0016] The second connecting flange is fitted against the outer wall of the first connecting flange on the same side; the first connecting flange and the second connecting flange are fixedly connected by bolts and nuts.

[0017] As a further optimization, to provide sealing protection at the connection between the sleeve and the first and second pipes, the multi-stage sealing structure includes:

[0018] A gap is left between the inner wall of the sleeve and the outer wall of the inner end of the first and second pipes;

[0019] A sealing ring, the outer circumferential surface of which is attached to the left and right sides of the inner wall of the sleeve;

[0020] The inner ring surface of the sealing ring is in close contact with the outer wall of the inner end of the first and second pipes.

[0021] As a further optimization, in order to seal the mating surfaces of the first connecting flange and the second connecting flange, rubber gaskets are pasted on both the left and right ends of the sleeve, with their inner sides extending to the inner ring surface of the sleeve's retaining ring.

[0022] The outer wall of the rubber pad is in contact with the inner wall of the second connecting flange on the same side;

[0023] The inner side of the rubber pad is in contact with the outer wall of the first and second pipes.

[0024] As a further optimization, in order to ensure the sealing effect through multi-layer sealing, the sleeve has two sealing rings at both ends.

[0025] As a further optimization, in order to prevent the sealing ring from being squeezed into the gap under high pressure by shielding the low-pressure side of the sealing ring with annular plates and improve the sealing life, annular plates are pasted on the left and right ends of the inner wall of the sleeve corresponding to the sealing ring.

[0026] The annular plate is attached to the outer end of the corresponding sealing ring.

[0027] As a further optimization, to enhance the sealing effect between the sealing ring and the outer walls of the first and second pipes, a sealing reinforcement structure is fitted between the inner annular surface of the sealing ring and the outer walls of the first and second pipes, comprising:

[0028] O-rings are glued and fixed to the inner ring surface of the sealing ring, and there are two O-rings in total;

[0029] The outer wall of the inner end of the first and second pipes is provided with an annular groove corresponding to the O-ring.

[0030] The O-ring is inserted into the corresponding annular groove.

[0031] As a further optimization, to further enhance the anti-loosening effect, the outer wall of the bolt and nut is coated with an anti-loosening adhesive layer.

[0032] As a further optimization, in order to absorb and buffer the vibration energy of the pipeline through the deformation of the flexible bellows when subjected to vibration, and to avoid stress concentration at the pipeline connection, the flexible transition structure includes:

[0033] A flexible corrugated pipe with annular mounting plates coaxially attached to both ends;

[0034] The installation gap is located in the middle of the sleeve;

[0035] The outer end of the annular mounting plate is glued and fixed to the inner wall of the mounting gap on the same side.

[0036] As a further optimization, in order to improve the strength of the flexible corrugated pipe in the installation gap section, a plug ring is coaxially fixed on the outer side of the annular mounting plate.

[0037] The inner wall of the installation gap section has an annular slot corresponding to the insertion ring on the same side, and the insertion ring is inserted into and pasted into the annular slot on the same side.

[0038] This utility model provides an improved pipe connector for a hydraulic pile driver, which has the following improvements and advantages compared with the prior art:

[0039] The method of using a sleeve installed inside the first and second pipes and then connecting and fixing them with bolts improves the strength of the connection. The gap at the connection is equipped with a multi-stage sealing structure to ensure a strong sealing effect, better resisting high pressure impact and vibration. The vibration is buffered by a flexible transition structure, reducing the impact of vibration on the multi-stage sealing structure. At the same time, the vibration is buffered and the vibration stress is effectively released, reducing the risk of pipeline fatigue fracture and improving the reliability of the entire hydraulic system. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of this utility model;

[0042] Figure 2 This is a schematic cross-sectional view of the structure of this utility model;

[0043] Figure 3 This utility model Figure 2 Enlarged structural diagram at point B;

[0044] Figure 4 This is a schematic diagram of the anti-loosening adhesive layer assembly structure of this utility model;

[0045] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1-First pipe, 2-Second pipe, 3-Pipe connector body, 31-Sleeve, 32-Bolt connection structure, 321-Second connecting flange, 322-First connecting flange, 323-Bolt, nut, 33-Multi-stage sealing structure, 331-Sealing ring, 332-Annular groove, 333-O-ring, 334-Annular plate, 335-Rubber gasket, 4-Flexible transition structure, 41-Installation gap, 42-Flexible corrugated pipe, 43-Annular mounting plate, 44-Annular slot, 45-Plug ring. Detailed Implementation

[0048] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] Please see Figure 1-5 The present invention provides the following technical solution:

[0052] This utility model provides a pipeline connector for a hydraulic pile driver, which is mainly used to solve the problems of sealing failure and fatigue fracture at the pipeline connection of the hydraulic pile driver in the prior art due to high pressure impact and vibration. By adopting a sleeve connection, multi-stage sealing and flexible transition structure, the connection strength, sealing performance and vibration resistance are significantly improved.

[0053] Overall structural overview:

[0054] like Figure 1 and Figure 2 As shown, the pipeline connector for the hydraulic pile hammer mainly includes a first pipeline 1, a second pipeline 2, and a pipeline connector body 3. The first pipeline 1 and the second pipeline 2 are respectively connected to the oil port of the hammer body of the hydraulic pile hammer. The two ends of the pipeline connector body 3 are respectively coaxially fixed and connected to the inner ends of the first pipeline 1 and the second pipeline 2 to form a complete hydraulic oil circuit.

[0055] The main body 3 of the pipeline connector includes a sleeve 31, a bolt connection structure 32, a multi-stage sealing structure 33, and a flexible transition structure 4. The sleeve 31 serves as the connection core, with retaining rings integrally formed on the inner annular surfaces of both ends for inserting into and limiting the inner ends of the first pipe 1 and the second pipe 2. The inner ends of the first pipe 1 and the second pipe 2 pass through the retaining rings on the same side of the sleeve 31 and are fixed to the sleeve 31 by the bolt connection structure 32. The multi-stage sealing structure 33 is set in the gap between the inner wall of the sleeve 31 and the outer wall of the pipe to ensure the sealing effect. The flexible transition structure 4 is installed in the middle of the sleeve 31 to buffer the vibration during the operation of the pressure system.

[0056] Structure and function of sleeve 31:

[0057] like Figure 2 and Figure 5 As shown, the sleeve 31 is made of high-strength metal material. The retaining ring inside is used to prevent the first pipe 1 and the second pipe 2 from being over-inserted and to ensure the coaxiality of the pipe and the sleeve 31. An installation gap section 41 is opened in the middle of the sleeve 31 to accommodate the flexible transition structure 4.

[0058] Detailed description of bolted connection structure 32:

[0059] like Figure 2 and Figure 3 As shown, the bolt connection structure 32 is used to firmly connect the first pipe 1 and the second pipe 2 to the sleeve 31, improving the mechanical strength of the connection. The bolt connection structure 32 includes a first connecting flange 322, a second connecting flange 321, and bolts and nuts 323. The first connecting flange 322 is fixedly sleeved on the left and right edges of the outer wall of the sleeve 31, and is integrally formed or welded to the sleeve 31. The second connecting flange 321 is fixedly sleeved on the inner end of the outer wall of the first pipe 1 and the second pipe 2, and is integrally formed or welded to the pipe.

[0060] The second connecting flange 321 fits against the outer wall of the first connecting flange 322 on the same side and is fixedly connected by asymmetrically distributed bolts and nuts 323. This flange connection method provides strong clamping force to ensure that the pipeline will not loosen under high pressure and vibration. Through asymmetrical design, it is ensured that the connector can only be installed in one correct direction to prevent incorrect installation. There are at least four asymmetrically distributed bolts and nuts 323 to ensure connection strength.

[0061] To further enhance the anti-loosening effect, such as Figure 4 As shown, the outer wall of the bolt and nut 323 is coated with an anti-loosening adhesive layer 5. The anti-loosening adhesive layer 5 is made of high-strength thread-locking adhesive, which effectively prevents the bolt from loosening spontaneously under vibration.

[0062] The sealing mechanism of the multi-stage sealing structure 33:

[0063] like Figure 3 As shown, the multi-stage sealing structure 33 is used to ensure the sealing performance at the connection between the sleeve 31 and the pipeline and to prevent high-pressure hydraulic oil leakage. The multi-stage sealing structure 33 includes a sealing ring 331, an annular plate 334, an O-ring 333 and an annular groove 332.

[0064] A small gap is left between the inner wall of the sleeve 31 and the outer wall of the inner end of the first pipe 1 and the second pipe 2 to accommodate the sealing components. The sealing ring 331 is made of oil-resistant and high-pressure-resistant rubber material. In this embodiment, nitrile rubber is used. Its outer ring surface is glued to the left and right sides of the inner wall of the sleeve 31 with adhesive. Two sealing rings 331 are provided at each pipe connection to form a double sealing barrier. The inner ring surface of the sealing ring 331 is tightly fitted to the outer wall of the pipe to prevent hydraulic oil from leaking from the radial gap.

[0065] The annular plate 334 is attached to the left and right ends of the inner wall of the sleeve 31, corresponding to the outer end of each sealing ring 331, i.e. the low-pressure side. The annular plate 334 is made of metal or high-strength plastic. Its function is to shield the sealing ring 331, prevent the sealing ring 331 from being squeezed into the gap under high pressure impact, and extend the service life of the sealing ring.

[0066] To enhance the sealing effect, a sealing reinforcement structure is provided between the inner annular surface of the sealing ring 331 and the outer wall of the pipe. This structure includes two O-rings 333, which are glued and fixed to the inner annular surface of the sealing ring 331. The outer wall of the inner end of the first pipe 1 and the second pipe 2 is provided with an annular groove 332 corresponding to the position of the O-ring 333. The O-ring 333 is embedded in the annular groove 332. This design increases the sealing contact area and improves the sealing reliability, and is especially suitable for high pressure and vibration environments.

[0067] In addition, such as Figure 3 As shown, rubber gaskets 335 are also attached to both ends of the sleeve 31. The inner side of the rubber gasket 335 extends to the inner ring surface of the retaining ring of the sleeve 31, and its outer wall is in contact with the inner wall of the second connecting flange 321 on the same side. The rubber gasket 335 is used to seal the contact surfaces of the first connecting flange 322 and the second connecting flange 321 to prevent hydraulic oil from leaking from the flange gap.

[0068] The buffering principle of flexible transition structure 4:

[0069] like Figure 2 and Figure 5 As shown, the flexible transition structure 4 is used to absorb and buffer the vibration energy of the hydraulic pile driver during operation, reduce stress concentration, and protect the sealing structure and pipe connection. The flexible transition structure 4 includes a flexible bellows 42, an annular mounting plate 43, a plug ring 45, and an annular slot 44.

[0070] The flexible corrugated pipe 42 is made of stainless steel or high-strength elastic alloy, and has good flexibility and fatigue resistance. Both ends of the pipe are coaxially attached with annular mounting plates 43. The mounting gap section 41 in the middle of the sleeve 31 is used to install the flexible corrugated pipe 42. The outer end of the annular mounting plate 43 is fixed to the inner wall of the mounting gap section 41 by adhesive.

[0071] To improve the connection strength, a ring 45 is coaxially fixed on the outer side of the annular mounting plate 43, which is integrally formed or welded with the annular mounting plate 43; an annular slot 44 is opened on the inner wall of the mounting gap section 41 corresponding to the ring 45 on the same side, and the ring 45 is inserted into and pasted in the annular slot 44. This plug-in structure increases the contact area and ensures that the flexible corrugated pipe 42 will not detach under vibration.

[0072] When the hydraulic system vibrates, the flexible bellows 42 absorbs the vibration energy through its own elastic deformation, preventing the vibration stress from being directly transmitted to the pipe joints and sealing structures. This significantly reduces the risk of pipe fatigue fracture and extends the service life of the multi-stage sealing structure.

[0073] Working principle:

[0074] In practical applications, hydraulic oil flows in from the first pipe 1, passes through the main body of the pipe connector 3, and flows out from the second pipe 2. Due to the use of the bolt connection structure 32, the connection has high mechanical strength and can withstand the impact of high-pressure hydraulic oil. The multi-stage sealing structure 33 ensures the reliability of the seal through the synergistic effect of the sealing ring 331, O-ring 333, and annular plate 334, and will not leak even under high-frequency vibration. The flexible transition structure 4 effectively buffers vibration, reduces stress concentration, and improves the reliability and durability of the entire hydraulic system. It solves the problems of easy seal failure and easy fatigue fracture of pipelines in the prior art, and is particularly suitable for high-pressure and high-vibration environments such as hydraulic pile hammers.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pipe connector for a hydraulic pile driver, comprising a first pipe (1) and a second pipe (2) connected to the oil port of the hydraulic pile driver body, characterized in that: The main body (3) of the pipeline connector is fixedly connected at both ends to the inner ends of the first pipeline (1) and the second pipeline (2) respectively; The main body (3) of the pipeline connector includes: The sleeve (31) has retaining rings integrally formed on the inner annular surfaces at both ends; The inner ends of the first pipe (1) and the second pipe (2) pass through the retaining ring on the same side of the sleeve (31); A bolt connection structure (32) is assembled between the outer wall of the inner end of the first pipe (1) and the outer wall of the sleeve (31) on the same side as the outer wall of the sleeve (31); A multi-level sealing structure (33) is assembled between the outer wall of the inner end of the first pipe (1) and the inner wall of the sleeve (31) on the same side; The sleeve (31) is equipped with a flexible transition structure (4) in the middle.

2. The pipeline connector for a hydraulic pile driver according to claim 1, characterized in that, The bolted connection structure (32) includes: The first connecting flange (322) is fixedly sleeved on the left and right edges of the outer wall of the sleeve (31); The second connecting flange (321) is fixedly sleeved on the inner end of the outer wall of the first pipe (1) and the second pipe (2); The second connecting flange (321) is in contact with the outer wall of the first connecting flange (322) on the same side; the first connecting flange (322) and the second connecting flange (321) are fixedly connected by bolts and nuts (323).

3. A pipe connector for a hydraulic pile driver according to claim 1, characterized in that, The multi-stage sealing structure (33) includes: A gap is left between the inner wall of the sleeve (31) and the outer wall of the inner end of the first pipe (1) and the second pipe (2); A sealing ring (331) is attached to the left and right sides of the inner wall of the sleeve (31) on its outer ring surface; The inner ring surface of the sealing ring (331) is in close contact with the outer wall of the inner end of the first pipe (1) and the second pipe (2).

4. A pipe connector for a hydraulic pile driver according to claim 2, characterized in that, Rubber pads (335) are attached to both the left and right ends of the sleeve (31), and their inner sides extend to the inner ring surface of the retaining ring of the sleeve (31). The outer wall of the rubber pad (335) is in contact with the inner wall of the second connecting flange (321) on the same side; The inner side of the rubber pad (335) is in contact with the outer wall of the first pipe (1) and the second pipe (2).

5. A pipe connector for a hydraulic pile driver according to claim 3, characterized in that, The sleeve (31) has two sealing rings (331) at both ends.

6. A pipe connector for a hydraulic pile driver according to claim 3, characterized in that, The inner wall of the sleeve (31) has annular plates (334) attached to the left and right ends corresponding to the sealing ring (331); The annular plate (334) is attached to the outer end of the corresponding sealing ring (331).

7. A pipe connector for a hydraulic pile driver according to claim 3, characterized in that, A sealing reinforcement structure is fitted between the inner annular surface of the sealing ring (331) and the outer walls of the first pipe (1) and the second pipe (2), comprising: O-rings (333) are attached and fixed to the inner ring surface of the sealing ring (331), and there are two O-rings (333); The outer wall of the inner end of the first pipe (1) and the second pipe (2) is provided with an annular groove (332) corresponding to the O-ring (333); The O-ring (333) is inserted into the corresponding annular groove (332).

8. A pipe connector for a hydraulic pile driver according to claim 2, characterized in that, The outer wall of the bolts and nuts (323) is coated with an anti-loosening adhesive layer (5).

9. A pipe connector for a hydraulic pile driver according to claim 1, characterized in that, The flexible transition structure (4) includes: A flexible corrugated pipe (42) has an annular mounting plate (43) attached coaxially at both ends; Install a gap section (41), which is located in the middle of the sleeve (31); The outer end of the annular mounting plate (43) is glued and fixed to the inner wall of the mounting gap section (41) on the same side.

10. A pipe connector for a hydraulic pile driver according to claim 9, characterized in that, The outer side of the annular mounting plate (43) is coaxially fixed with a plug ring (45); The inner wall of the installation gap section (41) is provided with an annular slot (44) corresponding to the insertion ring (45) on the same side, and the insertion ring (45) is inserted into and pasted into the annular slot (44) on the same side.

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