A heat-dissipating wear-resistant device for a concrete vibrating rod

Abstract

The application relates to the technical field of concrete vibrating technology, and provides a heat-dissipating wear-resistant device for a concrete vibrating rod, the concrete vibrating rod comprising a hose, and the hose comprising a flexible shaft and a steel belt; the heat-dissipating wear-resistant device comprising: a radiator; a heat insulation layer wrapped on the outer side of the flexible shaft; a wear-resistant anti-aging layer wrapped on the outer side of the heat insulation layer; a wear-resistant part movably sleeved on the outer side of the wear-resistant anti-aging layer; a pulsating heat pipe heat-absorbing section arranged in the gap between the wear-resistant part and the wear-resistant anti-aging layer; a pulsating heat pipe heat-insulating section arranged on the outer side of the pulsating heat pipe heat-absorbing section, and the outer side of the pulsating heat pipe heat-insulating section being wrapped and connected with the steel belt; and a pulsating heat pipe heat-dissipating section distributed in the radiator. Through the pulsating heat pipe and the radiator, the heat generated by the internal parts of the vibrating rod during work is absorbed and discharged, the possibility of heat accumulation in the hose is reduced, and the vibrating rod can always be kept in a safe and efficient working state.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of concrete vibrating technology, and particularly relates to a heat-dissipating and wear-resistant device for a concrete vibrating rod. BACKGROUND

[0002] The existing hose of the concrete vibrating rod comprises a flexible shaft and a steel belt. The flexible shaft is prone to friction with the inner wall of the steel belt and generates a large amount of heat. When the vibrating rod is used for a long time at a high speed or the hose is bent, the flexible shaft is easily damaged by heat and even broken due to the lack of a protection device and a heat-dissipating device. Meanwhile, the hot steel belt transfers heat to the outer layer, causing damage to the rubber and other components, which seriously affects the service life of the concrete vibrating rod. The high-temperature hose also brings safety hazards to the use and maintenance of the vibrating rod, and even causes burns to the user. The micro-sound vibrating rod disclosed in Patent No. ZL96238166 makes some improvements, but at the same time, the vibration performance of the vibrating rod is sacrificed to reduce friction and noise, which slows down the construction efficiency. The low-noise high-frequency concrete vibrating rod disclosed in Patent No. ZL202022796509 solves the above problems through an overload double protector, but its cost is high, which is not conducive to the popularization and application in the market. The high-frequency concrete vibrator disclosed in Patent No. ZL2012203888891 improves the vibration frequency by adding a high-speed motor, but in actual application, it has the defects of large noise, short service life and small working radius.

[0003] At present, the construction engineering industry has not yet proposed a feasible solution to the above technical problems. SUMMARY

[0004] In view of the problems in the prior art, the application provides a heat-dissipating and wear-resistant device for a concrete vibrating rod. The wear-resistant structure is arranged between the flexible shaft and the steel belt to ensure the stability of the hose and prolong the service life of the hose. In combination with the heat-insulating and heat-conducting devices, the vibrating rod can always be maintained in a safe and efficient working state.

[0005] The application provides a heat-dissipating and wear-resistant device for a concrete vibrating rod. The concrete vibrating rod comprises a hose, and the hose comprises a flexible shaft and a steel belt. The heat-dissipating and wear-resistant device comprises:

[0006] a heat sink;

[0007] a heat-insulating layer, which is connected to the outer side of the flexible shaft in a wrapping manner;

[0008] a wear-resistant and anti-aging layer, which is connected to the outer side of the heat-insulating layer in a wrapping manner;

[0009] a wear-resistant part, which is movably sleeved on the outer side of the wear-resistant and anti-aging layer;

[0010] The pulsating heat pipe comprises a pulsating heat pipe heat absorption section, a pulsating heat pipe heat insulation section and a pulsating heat pipe heat dissipation section connected in sequence to form a closed loop; the pulsating heat pipe heat absorption section is arranged in the gap between the wear-resistant part and the wear-resistant anti-aging layer; the pulsating heat pipe heat insulation section is arranged outside the pulsating heat pipe heat absorption section, and the outer side of the pulsating heat pipe heat insulation section is covered and connected with the steel belt; the pulsating heat pipe heat dissipation section is distributed in the heat sink, and the inside of the pulsating heat pipe is filled with working medium; and

[0011] The rubber tube is covered on the outer side of the steel belt.

[0012] Further, the pulsating heat pipe heat absorption section is a spring-shaped structure, which is sleeved on the outer side of the wear-resistant part.

[0013] Further, the wear-resistant part comprises one or more wear-resistant corrugated pipes, and the plurality of wear-resistant corrugated pipes are distributed along the length direction of the flexible shaft.

[0014] Further, the peak part of the wear-resistant corrugated pipe is a glass fiber layer, and a rubber layer is connected between each peak part of the wear-resistant corrugated pipe.

[0015] Further, the wear-resistant part comprises a plurality of arc-shaped wear-resistant pieces distributed along the circumference of the wear-resistant anti-aging layer.

[0016] Further, the arc-shaped wear-resistant piece is provided with a limiting protrusion at both axial ends, and the pulsating heat pipe heat absorption section is located between the limiting protrusions at both axial ends of the arc-shaped wear-resistant piece.

[0017] Further, the wear-resistant part comprises a plurality of wear-resistant rings, and the plurality of wear-resistant rings are spaced apart and distributed along the length direction of the flexible shaft; the pulsating heat pipe heat absorption section comprises a plurality of spring pipe units connected in sequence, and one spring pipe unit is arranged between each two wear-resistant rings.

[0018] Further, the heat sink comprises a heat dissipation fin, and the surface of the heat dissipation fin is plated with graphene; the pulsating heat pipe heat dissipation section is distributed on the surface of the heat dissipation fin.

[0019] Further, the working medium comprises graphene oxide nanofluid.

[0020] Further, the filling rate of the working medium in the pulsating heat pipe is less than or equal to 50%.

[0021] The beneficial effects of the present application are: (1) by adding wear-resistant and anti-aging layer at the soft shaft and steel belt, direct friction between the soft shaft of the concrete vibrator and the steel belt during high-speed rotation is avoided, the stability of the hose structure is ensured, and the service life of the concrete vibrator hose is greatly prolonged. (2) By adding a low thermal conductivity heat insulation layer, heat is not transferred to other parts, greatly enhancing the heat insulation performance of the device, avoiding heat loss of the soft shaft. At the same time, the outer surface of the rubber tube is maintained at room temperature, ensuring the safety of the users and maintenance personnel. (3) By the pulsating heat pipe that can be arbitrarily bent and the heat sink cooperating with the pulsating heat pipe, the heat generated by the internal parts of the vibrator during operation is absorbed and discharged, reducing the possibility of heat accumulation inside the hose, so that the vibrator always maintains a safe and efficient working state. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat dissipation wear-resistant device for the concrete vibrator.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the hose. Figure 1

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the hose. Figure 2

[0025] Figure 4 It is a schematic diagram of the longitudinal sectional structure of the hose. Figure 2

[0026] Figure 5 It is a schematic diagram of the internal structure of the heat sink. Figure 1

[0027] Figure 6 It is a schematic diagram of the heat dissipation fin and the distribution of the surface pulsating heat pipe heat dissipation section. Figure 5

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the hose. Figure 1

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the hose. Figure 1

[0030] In the figure, 1-soft shaft; 2-heat insulation layer; 3-wear-resistant and anti-aging layer; 4-void; 5-wear-resistant part; 6-pulsating heat pipe heat absorption section; 7-pulsating heat pipe heat insulation section; 8-steel belt; 9-rubber tube; 10, heat sink; 11-fan; 12-heat dissipation fin; 13-pulsating heat pipe heat dissipation section. DETAILED DESCRIPTION ​​​​​​​

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figures 1-6 The heat dissipation and wear-resistant device shown is for a concrete vibrator. The concrete vibrator includes a hose, which includes a flexible shaft 1 and a steel strip 8.

[0034] The heat dissipation and wear-resistant device includes: a radiator 10, a heat insulation layer 2, a wear-resistant and anti-aging layer 3, a wear-resistant component 5, a pulsating heat pipe, and a rubber tube 9.

[0035] The heat insulation layer 2 covers and is connected to the outside of the flexible shaft 1; the wear-resistant and anti-aging layer 3 covers and is connected to the outside of the heat insulation layer 2; the wear-resistant part 5 is movably fitted on the outside of the wear-resistant and anti-aging layer 3.

[0036] The pulsating heat pipe includes a heat-absorbing section 6, an insulating section 7, and a heat-dissipating section 13, which are connected end to end to form a closed loop. The heat-absorbing section 6 is disposed in the gap 4 between the wear-resistant part 5 and the wear-resistant and anti-aging layer 3. Alternatively, the heat-absorbing section 6 can be disposed in the gap 4 between the wear-resistant and anti-aging layer 3 and the insulating section 7. The insulating section 7 is disposed on the outside of the heat-absorbing section 6, and a steel strip 8 is wrapped and connected to the outside of the insulating section 7. The heat-dissipating section 13 is distributed in the radiator 10, and the inside of the pulsating heat pipe is filled with a working medium.

[0037] The rubber tube 9 is wrapped around the outside of the steel strip 8.

[0038] In this embodiment, the pulsating heat pipe heat absorption section 6 has a spring-like structure, which can effectively increase the heat absorption area. The pulsating heat pipe heat absorption section 6 is fitted onto the outside of the wear-resistant component 5. The wear-resistant component 5 includes a wear-resistant corrugated pipe. There can be one or more wear-resistant corrugated pipes. When there are multiple wear-resistant corrugated pipes, the multiple wear-resistant corrugated pipes are distributed along the length direction of the flexible shaft 1.

[0039] The heat insulation layer 2 and the wear-resistant and anti-aging layer 3 are connected by an adhesive. The wear-resistant corrugated pipe and the pulsating heat pipe heat absorption section 6 are connected by an adhesive, and the heat insulation layer 2 and the flexible shaft 1 are connected by an adhesive. The pulsating heat pipe insulation section 7 and the steel strip 8 are connected by an adhesive. The adhesive is a thermosetting acrylic adhesive.

[0040] The heat insulation layer 2 is made of silica aerogel, a heat insulation material. The wear-resistant and anti-aging layer 3 is made of nylon and glass fiber composite material.

[0041] The crests of the wear-resistant corrugated pipe are made of glass fiber, and rubber layers connect the crests of the wear-resistant corrugated pipe.

[0042] The heat sink 10 comprises a shell and heat dissipation fins 12 arranged in the shell, the shell is made of steel material, the surface of the shell has heat dissipation holes, and a heat dissipation fan 11 is arranged at the heat dissipation holes to ensure air circulation in the heat sink 10 and improve heat dissipation efficiency, and the front end face and the rear end face of the shell are provided with through holes to facilitate the passage of the hose. The heat dissipation fins 12 in the shell are multiple, and the multiple heat dissipation fins 12 are arranged in parallel and at intervals. The heat sink 10 is arranged at one end of the hose close to the engine of the concrete vibrator rod.

[0043] The heat dissipation fins 12 are made of copper sheets, and the surface of the heat dissipation fins 12 is plated with graphene with high heat absorption performance; the copper sheets and graphene with excellent heat conduction performance accelerate the heat dissipation speed.

[0044] The pulsating heat pipe heat dissipation section 13 is distributed on the surface of the heat dissipation fin 12. The pulsating heat pipe heat dissipation section 13 located in the heat sink 10 can be divided into multiple parallel sub-heat dissipation units, each sub-heat dissipation unit is a tubular structure and is uniformly distributed on the surface of the heat dissipation fin 12. The pulsating heat pipe heat dissipation section 13 can also be arranged in an S-shaped curve on the surface of the heat dissipation fin 12 as a whole to ensure the heat dissipation effect.

[0045] The working medium in the pulsating heat pipe includes graphene oxide nanofluid. The filling rate of the working medium in the pulsating heat pipe is less than or equal to 50%. The inside of the pulsating heat pipe is vacuumized and filled with 50% graphene oxide nanofluid.

[0046] When the concrete vibrator rod starts to work, in an ideal state, the soft shaft 1 rotates in the gap 4 together with the heat insulation layer 2 and the wear-resistant and anti-aging layer 3; but in actual application, the wear-resistant and anti-aging layer 3 is in contact and friction with the wear-resistant corrugated pipe under the action of gravity and human bending, instead of the original friction between the soft shaft 1 and the steel belt 8, the generated heat is limited by the heat insulation layer 2 and the pulsating heat pipe heat insulation section 7, most of the heat remains in the gap 4, and a small part of the heat is dissipated outward through the gap 4 of the pulsating heat pipe heat insulation section 7, and of course the dissipated heat is much lower than the heat generated in normal work. The heat accumulation in the gap 4 causes the internal temperature to rise, and when the working temperature of the working medium is reached, the pulsating heat pipe heat absorption section 6 located in the gap 4 starts to work, the working medium in the internal vaporizes and absorbs the heat in the gap 4. When the working medium of the pulsating heat pipe heat absorption section 6 absorbs heat to generate bubbles, it rapidly expands and rises in pressure, pushes the working medium to flow to the pulsating heat pipe heat dissipation section 13, during which it passes through the pulsating heat pipe heat insulation section 7, and most of the heat is retained to reach the heat sink 10.

[0047] In the heat sink 10, the fan 11 accelerates the air flow rate inside the heat sink 10, and the red copper material and graphene plating layer of the heat dissipation fin 12 accelerate the heat dissipation of the pulsating heat pipe heat dissipation section 13. When the bubble carrying the working medium reaches the pulsating heat pipe heat dissipation section 13, the working medium bubble cools and shrinks and breaks, releasing heat, and the pressure drops. Due to the pressure difference between the pulsating heat pipe heat absorption section 6 and the pulsating heat pipe heat dissipation section 13 and the pressure imbalance between adjacent pulsating heat pipes, the working medium oscillates between the gap 4 and the heat sink 10, thereby achieving heat transfer.

[0048] Embodiment 2

[0049] The heat dissipation and wear-resistant device for the concrete vibrator rod of the present embodiment is substantially the same as that of Embodiment 1, except that the structure of the wear-resistant part 5 is different.

[0050] As shown in Figure 7 , the wear-resistant part 5 includes a plurality of arc-shaped wear-resistant pieces distributed along the circumference of the wear-resistant and anti-aging layer 3.

[0051] The axial ends of the arc-shaped wear-resistant pieces are provided with limiting protrusions, and the pulsating heat pipe heat absorption section 6 is located between the limiting protrusions at the axial ends of the arc-shaped wear-resistant pieces.

[0052] Figure 7 Two wear-resistant parts 5 are shown in the middle, each of which is provided with a section of the pulsating heat pipe heat absorption section 6.

[0053] The contact and friction between the arc-shaped wear-resistant pieces and the wear-resistant and anti-aging layer 3 replaces the original friction between the soft shaft 1 and the steel belt 8, and the heat generated is limited by the heat insulation layer 2 and the pulsating heat pipe heat insulation section 7. Most of the heat remains in the gap 4, and the heat accumulation in the gap 4 causes the internal temperature to rise. When the working temperature of the working medium is reached, the pulsating heat pipe heat absorption section 6 located in the gap 4 starts to work, the working medium inside vaporizes, absorbs the heat in the gap 4, and then transfers to the pulsating heat pipe heat dissipation section 13. The working medium after heat dissipation under the action of the heat sink 10 returns to the pulsating heat pipe heat absorption section 6 and continues to absorb heat, and the cycle continues.

[0054] Embodiment 3

[0055] The heat dissipation and wear-resistant device for the concrete vibrator rod of the present embodiment is substantially the same as that of Embodiment 1, except that the structure of the wear-resistant part 5 and the distribution position of the pulsating heat pipe heat absorption section 6 are different.

[0056] As shown in Figure 8 , the wear-resistant part 5 includes a plurality of wear-resistant rings, and the plurality of wear-resistant rings are distributed along the length direction of the soft shaft 1. The pulsating heat pipe heat absorption section 6 includes a plurality of spring pipe units connected in series, and one spring pipe unit is arranged between every two wear-resistant rings.

[0057] The contact friction between the wear-resistant ring and the wear-resistant anti-aging layer 3 generates heat, which is limited by the heat insulation layer 2 and the adiabatic section 7 of the pulsating heat pipe, and most of the heat remains in the gap 4. The heat accumulated in the gap 4 causes the internal temperature to rise. When the working temperature of the working medium is reached, the pulsating heat pipe heat absorption section 6 located in the gap 4 starts to work. The working medium inside the heat absorption section 6 vaporizes and absorbs the heat in the gap 4, thereby transferring to the pulsating heat pipe heat dissipation section 13. The working medium after heat dissipation under the action of the heat sink 10 flows back to the pulsating heat pipe heat absorption section 6 to continue heat absorption, and the cycle is repeated.

[0058] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A heat dissipation and wear-resistant device for a concrete vibrator, the concrete vibrator comprising a flexible hose, the flexible hose comprising a flexible shaft and a steel strip; characterized in that, The heat dissipation and wear-resistant device includes: heat sink; A heat insulation layer covers the outside of the flexible shaft; A wear-resistant and anti-aging layer is applied to the outside of the insulation layer. Wear-resistant parts are fitted on the outside of the wear-resistant and anti-aging layer; A pulsating heat pipe includes a heat-absorbing section, an insulating section, and a heat-dissipating section. The heat-absorbing section is disposed in the gap between the wear-resistant and anti-aging layer and the insulating section. The insulating section is located outside the heat-absorbing section, and the steel strip is attached to the outside of the insulating section. The heat-dissipating section is distributed within the radiator, and the interior of the heat pipe is filled with a working medium. A rubber tube is wrapped around the outside of the steel strip; The wear-resistant component includes multiple wear-resistant rings, which are spaced apart along the length of the flexible shaft. The heat absorption section of the pulsating heat pipe includes multiple spring tube units connected in series, with one spring tube unit disposed between every two wear-resistant rings. The working medium has a filling rate of less than or equal to 50% in the pulsating heat pipe; Heat accumulates in the gap, causing its internal temperature to rise. When the working temperature of the working medium is reached, the heat-absorbing section of the pulsating heat pipe located in the gap starts to work. The working medium inside vaporizes and absorbs the heat in the gap. When the working medium in the heat-absorbing section of the pulsating heat pipe absorbs heat and generates bubbles, it expands rapidly and increases in pressure, pushing the working medium to flow to the heat dissipation section of the pulsating heat pipe.

2. The heat dissipation and wear-resistant device for a concrete vibrator according to claim 1, characterized in that, The wear-resistant component includes a plurality of arc-shaped wear-resistant plates distributed circumferentially along the wear-resistant and anti-aging layer.

3. The heat dissipation and wear-resistant device for a concrete vibrator according to claim 2, characterized in that, The arc-shaped wear-resistant sheet has limiting protrusions at both axial ends, and the heat absorption section of the pulsating heat pipe is located between the limiting protrusions at both axial ends of the arc-shaped wear-resistant sheet.

4. The heat dissipation and wear-resistant device for a concrete vibrator according to claim 1, characterized in that, The heat sink includes heat dissipation fins, the surface of which is coated with graphene; the pulsating heat pipe heat dissipation section is distributed on the surface of the heat dissipation fins.

5. A heat dissipation and wear-resistant device for a concrete vibrator according to claim 1, characterized in that, The working medium includes graphene oxide nanofluid.

Images