Blade mold overturning hydraulic control system

Abstract

The utility model provides a hydraulic control system for turning over a blade mold. The hydraulic control system for turning over the blade mold comprises a hydraulic oil tank, a first reversing valve, a first oil cylinder, a second reversing valve, a second oil cylinder, a first overflow valve and a second overflow valve. The hydraulic oil tank is connected with the first oil cylinder through the first reversing valve, the hydraulic oil tank is connected with the second oil cylinder through the second reversing valve, the first overflow valve is arranged between a rodless cavity of the first oil cylinder and an oil return opening of the hydraulic oil tank, and the second overflow valve is arranged between a rodless cavity of the second oil cylinder and the oil return opening of the hydraulic oil tank. By adopting the first overflow valve and the second overflow valve, when the oil cylinder encounters a singular point and the internal pressure of the rodless cavity is increased abnormally, hydraulic oil in the oil cylinder is guided into the hydraulic oil tank through the overflow valves, overload protection is provided, and the internal pressure of the oil cylinder is effectively reduced; therefore, the problem that the oil cylinder is damaged due to vibration or impact when the die turns over a singular point is solved, and the service life of the die is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control of turnover molds, in particular to a hydraulic control system for a blade mold turnover. Background Art

[0002] With the continuous advancement of high-power wind turbine technology, research on long blade technology has become increasingly critical. The manufacturing process of the blades is the core link to ensure their performance and lifespan, and the mold plays an indispensable role in this process. Designing precise and durable wind turbine blade molds is the key to achieving high-quality blade molding. During the production process of wind turbine blades, wind turbine blade flip molds often use two or more single-joint flip arms to complete the opening and closing of the mold. However, this single-joint flip system will have singularity points when performing the flipping operation. When the mold flips through these singularity points, it will produce severe vibration and impact, which not only causes serious damage to the hydraulic cylinder, but also greatly affects the stability and service life of the mold. Utility Model Content

[0003] In view of the above problems in the prior art, the utility model provides a blade mold flip hydraulic control system to improve the technical problem that the existing wind turbine blade mold generates severe vibration and impact when flipping through a singular point, causing damage to the hydraulic cylinder.

[0004] To achieve the above-mentioned and other related objectives, the present invention provides a blade mold turning hydraulic control system, comprising a hydraulic oil tank, a first reversing valve, a first oil cylinder, a second reversing valve, a second oil cylinder, a first relief valve, and a second relief valve. The first reversing valve is connected to the oil outlet and return port of the hydraulic oil tank, and the first oil cylinder includes a first rodless chamber and a first rod chamber, each of which is connected to the first reversing valve.

[0005] The second reversing valve is connected to the oil outlet and oil return port of the hydraulic oil tank. The second oil cylinder includes a second rodless chamber and a second rod chamber, each of which is connected to the second reversing valve. The first relief valve is connected to the first rodless chamber and the oil return port of the hydraulic oil tank, respectively, while the second relief valve is connected to the second rodless chamber and the oil return port of the hydraulic oil tank.

[0006] In one embodiment of the blade mold flipping hydraulic control system of the present invention, a first balancing valve is provided on the connecting pipeline between the first reversing valve and the first rodless cavity, and a second balancing valve is provided on the connecting pipeline between the first reversing valve and the first rod cavity.

[0007] In one embodiment of the blade mold flipping hydraulic control system of the present invention, a third balancing valve is provided on the connecting pipeline between the second reversing valve and the second rodless chamber, and a fourth balancing valve is provided on the connecting pipeline between the second reversing valve and the second rod chamber.

[0008] In an embodiment of the blade mold turning hydraulic control system of the present invention, the first reversing valve and the second reversing valve are electromagnetic reversing valves.

[0009] In one embodiment of the blade mold turning hydraulic control system of the present invention, an oil pump is further included, and the hydraulic oil tank is connected to the first reversing valve and the second reversing valve respectively through the oil pump.

[0010] In one embodiment of the blade mold turning hydraulic control system of the present invention, an oil suction filter is provided on the connecting pipeline of the oil inlet of the oil pump.

[0011] In an embodiment of the blade mold turning hydraulic control system of the present invention, a pressure gauge is provided on the connecting pipeline of the oil outlet of the oil pump.

[0012] In one embodiment of the blade mold turning hydraulic control system of the present invention, the blade mold turning hydraulic control system further includes a third overflow valve, and the third overflow valve is respectively connected to the oil outlet and the oil return port of the hydraulic oil tank.

[0013] In an embodiment of the blade mold turning hydraulic control system of the present invention, an oil return filter is further provided on the connecting pipeline of the oil return port of the hydraulic oil tank.

[0014] In one embodiment of the blade mold turning hydraulic control system of the present invention, an air filter and a liquid level gauge are further provided on the hydraulic oil tank.

[0015] In this utility model's blade mold flipping hydraulic control system, two sets of hydraulic oil tanks circulate to drive the flip arm, which drives the mold flipping. This allows for smoother control of the flip arm's movement, reducing sudden shocks and vibrations that may occur during the flipping process. By employing a first relief valve and a second relief valve, when the oil cylinder encounters a singularity point, causing an abnormal increase in pressure within the rodless chamber, the relief valve directs the hydraulic oil in the cylinder into the hydraulic oil tank, providing overload protection and effectively reducing internal cylinder pressure. This reduces the risk of cylinder damage caused by vibration or impact when the mold flips past a singularity point, resulting in a more stable system and a longer mold life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a hydraulic principle diagram of an embodiment of a blade mold flipping hydraulic control system of the present utility model.

[0018] Component number description:

[0019] 100, hydraulic oil tank; 110, oil inlet pipeline; 111, first branch pipeline; 112, second branch pipeline; 120, oil return pipeline; 121, third branch pipeline; 122, fourth branch pipeline; 130, air filter; 140, liquid level gauge; 200, first reversing valve; 300, first oil cylinder; 310, first rodless chamber; 311, first oil chamber pipeline; 320, first rod chamber; 321, second oil chamber pipeline; 400, second reversing valve; 500, Second oil cylinder; 510, second rodless chamber; 511, third oil chamber pipeline; 520, second rod chamber; 521, fourth oil chamber pipeline; 600, first overflow valve; 700, second overflow valve; 810, first balancing valve; 820, second balancing valve; 830, third balancing valve; 840, fourth balancing valve; 910, oil pump; 920, oil suction filter; 930, pressure gauge; 931, pressure gauge switch; 940, third overflow valve; 950, return oil filter. DETAILED DESCRIPTION

[0020] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following examples and the features in the examples can be combined with each other unless there is a conflict. It should also be understood that the terms used in the examples of the present invention are for the purpose of describing specific implementation methods, not for the purpose of limiting the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0021] When numerical ranges are given in the examples, it should be understood that unless otherwise specified herein, both endpoints of each numerical range and any value between the endpoints may be used. Unless otherwise defined, all technical and scientific terms used in this utility model are consistent with the prior art as understood by those skilled in the art and the description of this utility model. Any prior art methods, equipment, and materials similar or equivalent to those in the examples of this utility model may also be used to implement this utility model.

[0022] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0023] To address the technical problem of existing wind turbine blade molds generating severe vibration and impact when flipping through a singularity point, which can damage the hydraulic cylinder, the present invention provides a blade mold flip hydraulic control system. This blade mold flip hydraulic control system provides overload protection for the cylinder when passing through the singularity point, reducing the risk of cylinder damage caused by vibration or impact when the mold flips through the singularity point and extending the mold's service life.

[0024] See also Figure 1 The present invention provides a blade mold flip hydraulic control system, which includes a hydraulic oil tank 100, a first reversing valve 200, a first oil cylinder 300, a second reversing valve 400, a second oil cylinder 500, a first relief valve 600, and a second relief valve 700. The hydraulic oil tank 100 is used to store the hydraulic oil required in the system to ensure that the hydraulic system has sufficient oil to circulate during operation. The first reversing valve 200 is connected to the oil outlet of the hydraulic oil tank 100 via a first branch pipeline 111 and an oil inlet pipeline 110. The first reversing valve 200 is connected to the oil return port of the hydraulic oil tank 100 via a third branch pipeline 121 and an oil return pipeline 120.

[0025] The first reversing valve 200 is connected to the first oil cylinder 300. The first reversing valve 200 is used to control the flow direction of the hydraulic oil, thereby determining the movement direction of the piston rod of the first oil cylinder 300. When the reversing valve changes its position, the flow path of the hydraulic oil also changes accordingly, thereby causing the piston of the oil cylinder to move in the extension or retraction direction. The type of the first reversing valve 200 is not limited, and it can be any suitable type of valve structure that meets the reversing function. For example, the first reversing valve 200 can be a motorized reversing valve, an electromagnetic reversing valve, a manual reversing valve, a sliding valve type reversing valve, etc. The first oil cylinder 300 includes a first rodless chamber 310 and a first rod chamber 320. The first rodless chamber 310 is connected to the first reversing valve 200 through a first oil chamber pipeline 311, and the first rod chamber 320 is connected to the first reversing valve 200 through a second oil chamber pipeline 321.

[0026] The second reversing valve 400 is connected to the oil outlet of the hydraulic oil tank 100 through the second branch line 112 and the oil inlet line 110. The second reversing valve 400 is connected to the oil return port of the hydraulic oil tank 100 through the fourth branch line 122 and the oil return line 120. The second reversing valve 400 is connected to the second oil cylinder 500. The second reversing valve 400 is used to control the flow direction of the hydraulic oil, thereby determining the movement direction of the piston rod of the second oil cylinder 500. The piston of the oil cylinder moves in the extension or retraction direction. The type of the second reversing valve 400 is not limited and can be any suitable type of valve structure that meets the reversing function. For example, the second reversing valve 400 can be a motorized reversing valve, a solenoid reversing valve, a manual reversing valve, a sliding valve type reversing valve, etc. The second oil cylinder 500 includes a second rodless chamber 510 and a second rod chamber 520 . The second rodless chamber 510 is connected to the second reversing valve 400 through a third oil chamber pipeline 511 , and the second rod chamber 520 is connected to the second reversing valve 400 through a fourth oil chamber pipeline 521 .

[0027] The first relief valve 600 is respectively connected to the first rodless chamber 310 and the oil return port of the hydraulic oil tank 100. Specifically, the inlet of the first relief valve 600 is connected to the first oil chamber pipeline 311, and the outlet of the first relief valve 600 is connected to the oil return pipeline 120. When the first oil cylinder 300 passes through the singularity point during mold flipping, causing excessive angular deviation, large shaking and impact problems, the internal pressure of the first rodless chamber 310 increases abnormally. When the pressure value set by the first relief valve 600 is reached, the hydraulic oil inside the first rodless chamber 310 will pass through the first relief valve 600 and the oil return pipeline 120 to return to the oil return port of the hydraulic oil tank 100, thereby preventing the first oil cylinder 300 from being damaged due to the abnormal pressure increase.

[0028] The second overflow valve 700 is respectively connected to the second rodless chamber 510 and the oil return port of the hydraulic oil tank 100. Specifically, the inlet of the second overflow valve 700 is connected to the third oil chamber pipeline 511, and the outlet of the second overflow valve 700 is connected to the oil return pipeline 120. When the second oil cylinder 500 passes through the singularity point during mold flipping, causing excessive angular deviation, large shaking and impact problems, the internal pressure of the second rodless chamber 510 increases abnormally. When the pressure value set by the second overflow valve 700 is reached, the hydraulic oil inside the second rodless chamber 510 will pass through the second overflow valve 700 and the oil return pipeline 120 to return to the oil return port of the hydraulic oil tank 100, thereby preventing the second oil cylinder 500 from being damaged due to abnormal pressure increase.

[0029] In the initial state, the first reversing valve 200 and the second reversing valve 400 control the flow direction of the hydraulic oil. The hydraulic oil enters the first rodless chamber 310 through the first reversing valve 200, and enters the second rodless chamber 510 through the second reversing valve 400; the first oil cylinder 300 and the second oil cylinder 500 perform an extension movement to drive the flip arm to rotate.

[0030] When the rotation angle reaches a certain point, the first oil cylinder 300 reaches the singularity point first. The first reversing valve 200 controls the hydraulic oil reversal, and the state of the first oil cylinder 300 changes from extended to retracted, while the second oil cylinder 500 remains extended. When reaching this position, the mold has great inertia and momentum, causing excessive angular deviation, significant shaking, and impact at this singularity point. At this time, the first relief valve 600 operates. When the abnormal pressure change in the first rodless cavity 310 reaches the set pressure value of the first relief valve 600, the hydraulic oil in the first oil cylinder 300 returns to the hydraulic oil tank 100 through the first relief valve 600, preventing the first oil cylinder 300 from being damaged by the large abnormal pressure change.

[0031] Similarly, when the rotation angle reaches another angle, the second cylinder 500 reaches a singularity point, and the second reversing valve 400 switches direction, causing the second cylinder 500 to change from extended to retracted, while the first cylinder 300 remains extended. The second relief valve 700 operates. When the abnormal pressure change in the second rodless chamber 510 reaches the set pressure value of the second relief valve 700, the hydraulic oil in the second cylinder 500 returns to the hydraulic tank 100 through the second relief valve 700, preventing damage to the second cylinder 500 caused by the large abnormal pressure change.

[0032] See also Figure 1In one embodiment of the blade mold flipping hydraulic control system of the present invention, a first balancing valve 810 is installed in the connecting pipeline between the first reversing valve 200 and the first rodless chamber 310. The first balancing valve 810 is installed on the first oil chamber pipeline 311, and the control oil port of the first balancing valve 810 is connected to the second oil chamber pipeline 321. A second balancing valve 820 is installed in the connecting pipeline between the first reversing valve 200 and the first rod chamber 320. The second balancing valve 820 is installed on the second oil chamber pipeline 321, and the control oil port of the second balancing valve 820 is connected to the first oil chamber pipeline 311. The first and second balancing valves 810 and 820 are used to adjust the maximum load holding pressure of the first oil cylinder 300 in the static state, keeping the mold in a fixed position and preventing it from sliding.

[0033] See also Figure 1 In one embodiment of the blade mold flipping hydraulic control system of the present invention, a third balancing valve 830 is provided on the connecting pipeline between the second reversing valve 400 and the second rodless chamber 510. The third balancing valve 830 is provided on the third oil chamber pipeline 511, and the control oil port of the third balancing valve 830 is connected to the fourth oil chamber pipeline 521. A fourth balancing valve 840 is provided on the connecting pipeline between the second reversing valve 400 and the second rod chamber 520. The fourth balancing valve 840 is provided on the fourth oil chamber pipeline 521, and the control oil port of the fourth balancing valve 840 is connected to the third oil chamber pipeline 511. The third and fourth balancing valves 830 and 840 are used to adjust the maximum load holding pressure of the second oil cylinder 500 in the static state, so that the mold can be stopped at a fixed position and prevent it from sliding down.

[0034] See also Figure 1 In one embodiment of the blade mold flipping hydraulic control system of the present invention, the first reversing valve 200 and the second reversing valve 400 adopt electromagnetic reversing valves. The type of electromagnetic reversing valve is not limited. It can be any suitable solenoid valve type that can control the flow direction of the hydraulic oil and thus control the extension or retraction function of the first cylinder 300 and the second cylinder 500. Specifically, in this embodiment, the electromagnetic reversing valve adopts a three-position five-way electromagnetic reversing valve.

[0035] In one embodiment of the blade mold flipping hydraulic control system of the present invention, an oil pump 910 is also included. The oil pump 910 serves as a power source for providing hydraulic oil to the hydraulic system, and transports the hydraulic oil in the hydraulic oil tank 100 to the first reversing valve 200 through the first branch pipeline 111 of the oil inlet pipeline 110, and transports it to the second reversing valve 400 through the second branch pipeline 112 of the oil inlet pipeline 110.

[0036] See also Figure 1In one embodiment of the blade mold flipping hydraulic control system of the present invention, an oil suction filter 920 is provided on the connecting pipeline of the oil inlet of the oil pump 910. The oil suction filter 920 is located in the hydraulic oil tank 100. Under the action of the oil pump 910, the oil suction filter 920 sucks oil from the hydraulic oil tank 100 and enters the control system or the third overflow valve 940 through the oil inlet pipeline 110 to ensure the cleanliness of the hydraulic oil, extend the service life of the hydraulic system components, and avoid problems such as valve sticking.

[0037] See also Figure 1 In one embodiment of the blade mold turning hydraulic control system of the present invention, a pressure gauge 930 is provided on the connecting pipeline of the oil outlet of the oil pump 910. Specifically, in this embodiment, the pressure gauge 930 is provided on the oil inlet pipeline 110 to monitor the current pressure status of the system in real time. At the same time, a pressure gauge switch 931 is provided on the connecting pipeline between the pressure gauge 930 and the oil inlet pipeline 110 to prevent oil leakage when replacing the pressure gauge 930.

[0038] See also Figure 1 In one embodiment of the blade mold flip hydraulic control system of the present invention, the blade mold flip hydraulic control system also includes a third relief valve 940, the inlet of the third relief valve 940 is connected to the oil inlet pipeline 110, and the outlet of the third relief valve 940 is connected to the return oil port of the hydraulic oil tank 100 through the return oil pipeline 120. The third relief valve 940 is used to control the pressure of the entire hydraulic system to prevent system damage caused by excessive pressure, while stabilizing the system pressure and reducing system shock and vibration caused by pressure fluctuations. Specifically, in this embodiment, the oil outlet of the hydraulic oil tank 100 is connected to the inlet of the third relief valve 940 through the oil pump 910 and the oil inlet pipeline 110, and the outlet of the third relief valve 940 is connected to the return oil pipeline 120, and is connected to the return oil port of the hydraulic oil tank 100 through the return oil filter 950.

[0039] See also Figure 1 In one embodiment of the blade mold flipping hydraulic control system of the present invention, a return oil filter 950 is further provided on the connecting pipeline of the oil return port of the hydraulic oil tank 100. Specifically, in this embodiment, the return oil filter 950 is installed on the return oil pipeline 120 near the oil return port of the hydraulic oil tank 100. The return oil filter 950 can filter and remove contaminants such as metal particles and rubber impurities in the hydraulic system, ensuring that the oil flowing back to the hydraulic oil tank 100 meets a certain cleanliness standard, reducing the system failure rate and maintaining the overall system performance.

[0040] See also Figure 1In one embodiment of the blade mold flipping hydraulic control system of the present invention, an air filter 130 and a liquid level gauge 140 are also provided on the hydraulic oil tank 100. The liquid level gauge 140 is used to display the real-time liquid level of the hydraulic oil in the hydraulic oil tank 100 to prevent air suction caused by too little oil and oil overflow caused by too much oil. The air filter 130 is used to filter the air when filling the hydraulic oil to reduce the mixing of bubbles. At the same time, the air filter 130 can prevent external pollutants from entering the hydraulic system and maintain the cleanliness of the oil. There is no restriction on the installation of the air filter 130, as long as it can facilitate the injection of lubricating oil into the hydraulic oil tank 100 and does not affect the installation and connection of other pipes or components.

[0041] In the blade mold flipping hydraulic control system of the present invention, the mold flipping is driven by two sets of hydraulic oil tanks through a circular drive flip arm, which controls the movement of the flip arm more smoothly and reduces sudden impacts and vibrations that may occur during the flipping process. By adopting the first overflow valve and the second overflow valve, when the oil cylinder encounters a singularity point and the internal pressure of the rodless cavity increases abnormally, the hydraulic oil in the oil cylinder is introduced into the hydraulic oil tank through the overflow valve to provide overload protection, effectively reducing the internal pressure of the oil cylinder, thereby reducing the problem of damage to the oil cylinder caused by vibration or impact when the mold flips over the singularity point, making the system more stable and increasing the service life of the mold. This improves the technical problem of the existing wind turbine blade mold causing damage to the hydraulic cylinder due to severe vibration and impact when flipping through the singularity point. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A blade mold turning hydraulic control system, characterized in that: include: Hydraulic oil tank; a first reversing valve, connecting the oil outlet and the oil return port of the hydraulic oil tank; The first oil cylinder includes a first rodless chamber and a first rod chamber; the first rodless chamber and the first rod chamber are respectively connected to the first reversing valve; a second reversing valve, connecting the oil outlet and the oil return port of the hydraulic oil tank; The second oil cylinder includes a second rodless chamber and a second rod chamber; the second rodless chamber and the second rod chamber are respectively connected to the second reversing valve; a first overflow valve, connected to the first rodless chamber and the oil return port of the hydraulic oil tank respectively; The second overflow valve is connected to the second rodless chamber and the oil return port of the hydraulic oil tank respectively.

2. The blade mold turning hydraulic control system according to claim 1, characterized in that: A first balancing valve is provided on the connecting pipeline between the first reversing valve and the first rodless chamber; A second balancing valve is provided on the connecting pipeline between the first reversing valve and the first rod chamber.

3. The blade mold turning hydraulic control system according to claim 1, characterized in that: A third balancing valve is provided on the connecting pipeline between the second reversing valve and the second rodless chamber; A fourth balancing valve is provided on the connecting pipeline between the second reversing valve and the second rod chamber.

4. The blade mold turning hydraulic control system according to claim 1, characterized in that: The first reversing valve and the second reversing valve are electromagnetic reversing valves.

5. The blade mold turning hydraulic control system according to claim 1, characterized in that: It also includes an oil pump, and the hydraulic oil tank is connected to the first reversing valve and the second reversing valve respectively through the oil pump.

6. The blade mold turning hydraulic control system according to claim 5, characterized in that: An oil suction filter is provided on the connecting pipeline of the oil inlet of the oil pump.

7. The blade mold turning hydraulic control system according to claim 5, characterized in that: A pressure gauge is provided on the connecting pipeline of the oil outlet of the oil pump.

8. The blade mold turning hydraulic control system according to claim 1, characterized in that: It also includes a third overflow valve, which is connected to the oil outlet and oil return port of the hydraulic oil tank respectively.

9. The blade mold turning hydraulic control system according to claim 1, characterized in that: An oil return filter is also provided on the connecting pipeline of the oil return port of the hydraulic oil tank.

10. The blade mold turning hydraulic control system according to claim 1, characterized in that: The hydraulic oil tank is also provided with an air filter and a liquid level gauge.

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