A hydraulic pipeline anti-pulsation attenuation sleeve for excavator

Abstract

The utility model discloses a kind of excavator hydraulic pipeline anti-pulsation attenuation sleeve, it is related to anti-pulsation attenuation sleeve technical field.The utility model includes outer layer pressure-resisting cylinder, the inner chamber of outer layer pressure-resisting cylinder is provided with pulsation absorption mechanism, pulsation absorption mechanism includes protective sleeve, protective sleeve is symmetrically arranged, and one side of protective sleeve is fixedly connected with rubber block.The utility model is by the arc-shaped protective sleeve of symmetric arrangement and adheres pipeline main body surface, cooperate spring and rubber block and form vibration-absorbing structure, capture the pressure pulsation energy of different directions in all directions, the elastic expansion of spring and the damping deformation of rubber block form double vibration-absorbing path, realize the stratified absorption and dissipation of pulsation energy, avoid energy concentrated transmission to pipeline main body, strengthen the transmission and absorption of vibration energy, weaken the impact of pressure pulsation to pipeline from source, solve the problem that existing single vibration-absorbing structure attenuation efficiency is insufficient, protection exists blind area.

Description

Technical Field

[0001] This utility model belongs to the field of anti-pulsation attenuation sleeve technology, and in particular relates to an anti-pulsation attenuation sleeve for excavator hydraulic lines. Background Technology

[0002] During excavator operation, the periodic suction and discharge of oil by the hydraulic pump, the high-frequency switching of the directional valve, and the sudden changes in the load of the actuators will inevitably cause pressure pulsation in the hydraulic pipeline. This pulsation is essentially an instantaneous fluctuation in the flow state of the hydraulic oil, which will cause the pipeline wall to vibrate and then transmit vibration energy to the surrounding structure.

[0003] By wrapping the outer wall of hydraulic pipelines with a buffer layer of elastic material such as rubber, the elastic deformation of the material absorbs some of the vibration energy, attempting to weaken the transmission of pressure pulsation. This solution has a simple structure and low cost, and is widely used for simple protection of medium and low pressure hydraulic systems.

[0004] Existing single buffer layers rely solely on the elasticity of the material itself to absorb vibrations, which cannot effectively cope with the high-pressure pulsating impacts of the excavator's hydraulic system. When pressure pulsations are transmitted to the buffer layer, the energy is concentrated and the instantaneous impact force is large. The deformation capacity of a single elastic material is limited. Under the high-frequency vibration, oil erosion, and environmental friction during excavator operation, it is easy to detach from the outer wall of the pipeline and lose its protective effect.

[0005] To address this issue, we provide an anti-pulsation attenuation sleeve for excavator hydraulic lines. Utility Model Content

[0006] The purpose of this utility model is to provide an anti-pulsation attenuation sleeve for excavator hydraulic lines. By combining the outer pressure-resistant sleeve and the pulsation absorption mechanism, it solves the problem that the existing single buffer layer cannot effectively cope with the high-pressure pulsation impact of the excavator hydraulic system because it only absorbs vibration through the elasticity of the material itself.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to an anti-pulsation attenuation sleeve for excavator hydraulic lines, comprising an outer pressure-resistant cylinder, the inner cavity of which is equipped with a pulsation absorption mechanism, the pulsation absorption mechanism including protective sleeves, the protective sleeves being symmetrically arranged, a rubber block being fixedly connected to one side of the protective sleeve, a spring being fixedly connected to the opposite side of the protective sleeve, a rubber pad being fixedly connected to the side wall of the protective sleeve, and a pressure sensor being fixedly connected to the side wall of the rubber pad, the inner cavity of the rubber pad containing the main body of the pipeline, the symmetrically arranged protective sleeves forming a ring-shaped structure, fitting against the outside of the main body of the pipeline, the rubber block providing elastic support for the protective sleeve while absorbing part of the vibration energy through its own deformation, the spring and the rubber block forming a corresponding cooperation, together constituting a bidirectional elastic buffer structure, when the main body of the pipeline... When vibration occurs due to pressure pulsation, the spring elastically expands and contracts in the direction of vibration, while the rubber block synchronously undergoes damping deformation, forming a double buffer feedback. The pressure sensor indirectly contacts the outer wall of the pipeline body, sensing the pressure changes in the pipeline body caused by pulsation in real time, providing data support for pulsation status monitoring. The elastic expansion and contraction of the spring and the damping deformation of the rubber block form a synergistic vibration absorption path, effectively reducing the vibration amplitude of the pipeline body caused by pulsation. The rubber pad not only plays a buffering and vibration reduction role, but also enhances the connection stability between the protective sleeve and the pipeline body, preventing relative displacement of the mechanism during vibration. The pressure sensor can provide real-time feedback on the pulsation status, facilitating timely monitoring of the pipeline's working condition and avoiding pipeline damage caused by pulsation overload.

[0009] The present invention is further configured such that a protective component is fixedly connected to the inner wall of the outer pressure-resistant cylinder. The protective component includes an inner support cylinder, which is disposed in the inner cavity of the outer pressure-resistant cylinder. A reinforcing rib is fixedly connected to the surface of the inner support cylinder. The inner support cylinder provides an installation foundation and radial support for the pulsation absorption mechanism, preventing the pulsation absorption mechanism from shifting due to vibration during operation. The reinforcing rib effectively enhances the structural strength and deformation resistance of the inner support cylinder, thereby improving the overall rigidity of the entire sleeve and enabling it to withstand the high-pressure impact of the excavator's hydraulic system.

[0010] The present invention is further configured such that the side of the rubber block away from the protective sleeve is fixedly connected to the inner support cylinder, the number of rubber blocks corresponds to the number of springs, and the number of rubber blocks is set in a corresponding manner to ensure that each spring can form a synergistic buffering effect with the rubber block, so that the buffering force is evenly distributed in the circumferential direction of the pipeline body, and the consistency and stability of pulsation attenuation are improved.

[0011] The present invention is further configured such that end caps are fixedly connected to both sides of the inner support cylinder, and a sealing cap is provided on one side of the end cap. Both sides of the pipeline body extend to the outside of the sealing cap. The sealing cap prevents external dust and impurities from entering the sleeve, avoiding contamination of the pulsation absorption mechanism or corrosion of the surface of the pipeline body. At the same time, it reduces the risk of hydraulic oil leakage and ensures the long-term reliable operation of the sleeve under complex working conditions.

[0012] The present invention is further configured such that the cross-section of the reinforcing rib is triangular, the length is consistent with the axial length of the inner support cylinder, and the reinforcing rib is evenly distributed around the circumference. The triangular cross-section of the reinforcing rib has better compressive strength and bending resistance than other shapes, and can more efficiently disperse the radial pressure borne by the inner support cylinder.

[0013] The present invention is further configured such that the end cap, the outer pressure-resistant cylinder and the inner support cylinder are all fixedly connected by bolts, the inner wall of the end cap is provided with an annular groove, the sealing cap is embedded in the annular groove, and the end cap, the outer pressure-resistant cylinder and the inner support cylinder are fixedly connected by bolts, which can resist the risk of loosening caused by high-frequency vibration, and at the same time facilitate the disassembly and maintenance of the sleeve.

[0014] The present invention is further configured such that the protective sleeve has an arc-shaped structure and fits the surface of the pipeline body. The arc-shaped fit design can also reduce the gap between the protective sleeve and the pipeline body, avoid rigid collisions during vibration, and enhance the stability of the protective sleeve wrapping the pipeline body, preventing relative displacement from affecting the pulsation attenuation effect.

[0015] The present invention is further configured such that the springs are symmetrically arranged and equidistantly distributed. The symmetrical and equidistantly distributed springs can ensure that the elastic buffer force on the circumference of the pipeline body is balanced, and avoid the aggravation of local vibration of the pipeline due to uneven force.

[0016] The present invention has the following beneficial effects.

[0017] 1. This utility model uses symmetrically arranged arc-shaped protective sleeves to fit the surface of the pipeline body, and together with springs and rubber blocks to form a vibration-absorbing structure, which captures pressure pulsation energy from different directions in all directions. The elastic extension and contraction of the springs and the damping deformation of the rubber blocks form a dual vibration-absorbing path, realizing the layered absorption and dissipation of pulsation energy, avoiding the concentrated transmission of energy to the pipeline body, strengthening the transmission and absorption of vibration energy, reducing the impact of pressure pulsation on the pipeline from the source, and solving the problems of insufficient attenuation efficiency and blind spots in the protection of existing single vibration-absorbing structures.

[0018] 2. This utility model forms a double-layer protective structure through an inner support cylinder and an outer pressure-resistant cylinder. The triangular reinforcing ribs evenly distributed around the circumference of the surface effectively enhance the overall structural strength of the sleeve, enabling it to withstand the impact of high-pressure working conditions of the excavator's hydraulic system and provide stable support for the internal pulsation absorption mechanism. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a three-dimensional view of a hydraulic pipeline anti-pulsation attenuation sleeve for excavators.

[0021] Figure 2 This is a three-dimensional view of the outer pressure-resistant sleeve of an anti-pulsation attenuation sleeve for hydraulic pipelines in excavators.

[0022] Figure 3 This is a three-dimensional view of a pulsation absorption mechanism in a pulsation attenuation sleeve for an excavator hydraulic pipeline.

[0023] Figure 4 This is a three-dimensional view of a protective sleeve in an anti-pulsation attenuation sleeve for hydraulic lines in an excavator.

[0024] Figure 5 This is a three-dimensional view of the inner support cylinder in an anti-pulsation attenuation sleeve for hydraulic lines in an excavator.

[0025] In the attached diagram: 1. Outer pressure-resistant cylinder; 2. Pulsation absorption mechanism; 21. Protective sleeve; 22. Rubber block; 23. Spring; 24. Rubber pad; 25. Pressure sensor; 26. Pipeline body; 3. Protective components; 31. Inner support cylinder; 32. Reinforcing rib; 4. End cap; 5. Sealing cap. Detailed Implementation

[0026] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Please see Figure 1-5 This anti-pulsation attenuation sleeve mainly includes an outer pressure-resistant cylinder 1, a protective component 3, a pulsation absorption mechanism 2, an end cap 4, and a sealing cap 5. The outer pressure-resistant cylinder 1, the inner support cylinder 31, and the end cap 4 are preferably made of high-strength alloy steel. The protective sleeve 21, the rubber block 22, and the rubber pad 24 are made of oil-resistant and wear-resistant fluororubber. The spring 23 is made of corrosion-resistant stainless steel. The pressure sensor 25 is an NW101 diffused silicon piezoresistive sensor, ensuring long-term stable operation under complex working conditions of excavators.

[0028] The outer pressure-resistant cylinder 1 is a hollow cylindrical structure that provides an overall protective shell. Its inner wall is fixedly connected to the protective component 3. The protective component 3 includes an inner support cylinder 31 and reinforcing ribs 32. The inner support cylinder 31 is coaxially arranged in the inner cavity of the outer pressure-resistant cylinder 1. Reinforcing ribs 32 with triangular cross-sections are evenly distributed on the circumference of its surface. The length of the reinforcing ribs 32 is consistent with the axial length of the inner support cylinder 31, which can effectively disperse radial pressure and enhance structural rigidity.

[0029] The pulsation absorption mechanism 2 is installed inside the inner support cylinder 31 and consists of a symmetrically arranged arc-shaped protective sleeve 21, a rubber block 22, a spring 23, a rubber pad 24, and a pressure sensor 25. The protective sleeve 21 is wrapped around the outside of the pipeline body 26, and its outer side is fixedly connected to the rubber block 22. The end of the rubber block 22 away from the protective sleeve 21 is fixed to the inner support cylinder 31. The opposite side of the protective sleeve 21 is symmetrically and equidistantly connected with springs 23, forming a bidirectional elastic buffer structure. The rubber pad 24 fixed inside the protective sleeve 21 enhances the fit stability and also plays a buffering role. The pressure sensor 25 is fixed to the side wall of the rubber pad 24 and indirectly contacts the outer wall of the pipeline body 26.

[0030] The end cap 4 is fixedly connected to the outer pressure-resistant cylinder 1 and the inner support cylinder 31 by bolts. The annular groove on its inner wall is used to embed the sealing cap 5. The main body of the pipeline 26 extends through the sealing cap 5 to the outside of the sleeve on both sides to achieve sealing protection.

[0031] The installation and operation process of this anti-pulsation attenuation sleeve is as follows: First, the inner support cylinder 31 is coaxially installed into the inner cavity of the outer pressure-resistant cylinder 1. After ensuring that the axes of the two are aligned, it is fixed with bolts. Then, the spring 23 is symmetrically installed on the opposite side of the two protective sleeves 21. Next, the rubber block 22 is fixed on the outside of the protective sleeve 21. The pressure sensor 25 is installed in the preset installation position of the rubber pad 24. Finally, the rubber pad 24 is fixed on the inside of the protective sleeve 21 to complete the pre-assembly of the pulsation absorption mechanism 2.

[0032] Place the pre-assembled pulsation absorption mechanism 2 into the inner cavity of the inner support cylinder 31, so that the protective sleeve 21 forms a ring-shaped structure. Insert the main body of the pipeline 26 through the sealing cap 5 on one side, pass through the inner support cylinder 31 and the inner cavity of the rubber pad 24 of the pulsation absorption mechanism 2 in sequence, and then exit through the sealing cap 5 on the other side. Adjust the position of the main body of the pipeline 26 to ensure that the protective sleeve 21 fits against the surface of the main body of the pipeline 26 through the rubber pad 24.

[0033] Align the two end caps 4 with the ends of the outer pressure-resistant cylinder 1 and the inner support cylinder 31 respectively, and tighten them with bolts. At the same time, ensure that the sealing cap 5 is fully embedded in the annular groove of the end cap 4 to achieve the sealing and encapsulation of the sleeve. Finally, connect the pressure sensor 25 to the excavator control system signal to complete the overall installation.

[0034] When the excavator's hydraulic system is working, the pressure pulsation in the hydraulic pipeline causes the pipeline body 26 to vibrate. The vibration is quickly transmitted to the protective sleeve 21 through the rubber pad 24. The rubber block 22 completes the primary vibration absorption through its own damping deformation. At the same time, the spring 23 elastically expands and contracts in sync with the vibration direction to form secondary vibration absorption. The dual vibration absorption path realizes the layered absorption and dissipation of pulsating energy, effectively reducing the vibration amplitude of the pipeline body 26.

[0035] The triangular reinforcing ribs 32 on the surface of the inner support cylinder 31 effectively disperse radial pressure, forming a double-layer protective structure with the outer pressure-resistant cylinder 1, enhancing the overall resistance to deformation and ensuring structural stability under high pressure conditions. The pressure sensor 25 captures the pressure change signal of the pipeline body 26 in real time and feeds it back to the control system, allowing operators to intuitively grasp the intensity and trend of pulsation, predict overload risks in a timely manner, and avoid fatigue damage to the pipeline caused by long-term vibration, thus realizing the integrated function of passive protection and active monitoring.

[0036] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A hydraulic pipeline anti-pulsation attenuation sleeve for excavators, comprising an outer pressure-resistant sleeve (1), characterized in that: The inner cavity of the outer pressure-resistant cylinder (1) is provided with a pulsation absorption mechanism (2); The pulsation absorption mechanism (2) includes a protective sleeve (21), which is symmetrically arranged. A rubber block (22) is fixedly connected to one side of the protective sleeve (21), and a spring (23) is fixedly connected to the opposite side of the protective sleeve (21). A rubber pad (24) is fixedly connected to the side wall of the protective sleeve (21), and a pressure sensor (25) is fixedly connected to the side wall of the rubber pad (24). A pipeline body (26) is provided in the inner cavity of the rubber pad (24).

2. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 1, characterized in that: The inner wall of the outer pressure-resistant cylinder (1) is fixedly connected to a protective component (3), the protective component (3) includes an inner support cylinder (31), the inner support cylinder (31) is disposed in the inner cavity of the outer pressure-resistant cylinder (1), and the surface of the inner support cylinder (31) is fixedly connected to a reinforcing rib (32).

3. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 2, characterized in that: The side of the rubber block (22) away from the protective sleeve (21) is fixedly connected to the inner support cylinder (31), and the number of the rubber blocks (22) corresponds to the number of springs (23).

4. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 2, characterized in that: The inner support cylinder (31) is fixedly connected to end caps (4) on both sides, and a sealing cap (5) is provided on one side of the end cap (4). Both sides of the pipeline body (26) extend to the outside of the sealing cap (5).

5. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 2, characterized in that: The cross-section of the reinforcing rib (32) is triangular, and its length is consistent with the axial length of the inner support cylinder (31). The reinforcing rib (32) is evenly distributed around the circumference.

6. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 4, characterized in that: The end cap (4), the outer pressure-resistant cylinder (1) and the inner support cylinder (31) are all fixedly connected by bolts. The inner wall of the end cap (4) is provided with an annular groove, and the sealing cap (5) is embedded in the annular groove.

7. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 1, characterized in that: The protective sleeve (21) has an arc-shaped structure and fits the surface of the pipeline body (26).

8. The anti-pulsation attenuation sleeve for excavator hydraulic lines according to claim 1, characterized in that: The springs (23) are symmetrically arranged and equidistantly distributed.

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