A control system and a vacuum furnace

Abstract

This utility model relates to the field of hydraulic cylinder control technology, specifically to a control system and a vacuum furnace. The control system is used to adjust the output pressure of the hydraulic cylinder inside the vacuum furnace, and includes a hydraulic oil tank, an adjusting mechanism, a detection mechanism, and a controller. The hydraulic oil tank is connected to the hydraulic cylinder via a hydraulic pipeline. Along the extension direction of the hydraulic pipeline, multiple adjusting mechanisms with progressively decreasing adjustment ranges are provided. The detection mechanism is located at the output end of the hydraulic cylinder and is used to detect the output pressure of the hydraulic cylinder. The controller is electrically connected to both the adjusting mechanism and the detection mechanism. The control system and vacuum furnace provided by this utility model can improve the adjustment accuracy of the hydraulic cylinder output pressure and prevent deformation of components pressed by the hydraulic cylinder.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder control technology, specifically to a control system and a vacuum furnace. Background Technology

[0002] In a vacuum furnace, hydraulic cylinders serve as the core actuators, primarily used to hold down the parts that are stacked layer upon layer inside the furnace.

[0003] In a vacuum furnace, the hydraulic cylinder outputs a certain pressure to hold down the stacked parts. During the heat treatment process in the vacuum furnace, the stacked parts will expand due to heat. At this time, it is necessary to adjust the output pressure of the hydraulic cylinder. Since the output pressure of the hydraulic oil is directly related to the amount of hydraulic oil injected, it is necessary to adjust the injected hydraulic oil circuit. The existing adjustment method is to adjust it only through a proportional valve, which makes the adjustment accuracy low and cannot guarantee that the output pressure of the hydraulic cylinder is accurately adjusted to be close to the set pressure. Utility Model Content

[0004] (I) This utility model provides a control system and a vacuum furnace to alleviate the technical problem of low accuracy of hydraulic cylinder output pressure regulation in the prior art.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, embodiments of this utility model provide a control system for adjusting the output pressure of the hydraulic cylinder output end inside a vacuum furnace, including a hydraulic oil tank, an adjustment mechanism, a detection mechanism, and a controller;

[0007] The hydraulic oil tank is connected to the hydraulic cylinder through a hydraulic pipeline. Along the extension direction of the hydraulic pipeline, multiple adjustment mechanisms with successively decreasing adjustment ranges are provided on the hydraulic pipeline.

[0008] The detection mechanism is located at the output end of the hydraulic cylinder and is used to detect the output pressure of the hydraulic cylinder;

[0009] The controller is electrically connected to both the adjustment mechanism and the detection mechanism.

[0010] Furthermore, the adjustment mechanism includes a first adjustment mechanism and a second adjustment mechanism;

[0011] The first regulating mechanism includes at least one first regulating valve, and the second regulating mechanism includes at least one second regulating valve. Both the first regulating valve and the second regulating valve are located in the hydraulic pipeline.

[0012] Furthermore, there is one first regulating valve and ten second regulating valves.

[0013] Furthermore, the detection mechanism includes a weighing sensor located at the output end of the hydraulic cylinder. The weighing sensor is used to detect the output pressure of the hydraulic cylinder and is also electrically connected to the controller.

[0014] Furthermore, the detection mechanism also includes a pressure sensor, which is located at the connection between the hydraulic pipeline and the oil inlet of the hydraulic cylinder. The pressure sensor is used to detect the oil pressure in the hydraulic pipeline and is electrically connected to the controller.

[0015] Furthermore, the control system also includes a power mechanism located in the hydraulic pipeline for pumping hydraulic oil from the hydraulic tank into the hydraulic pipeline.

[0016] Furthermore, the power mechanism includes a hydraulic pump and a hydraulic motor, the hydraulic pump being located in the hydraulic pipeline, and the hydraulic motor being connected to the hydraulic pump.

[0017] Furthermore, a return pipe is provided between the hydraulic pipeline and the hydraulic oil tank, and the return pipe is equipped with an overflow valve, which is electrically connected to the controller.

[0018] Furthermore, the hydraulic pipeline is also equipped with an electromagnetic directional valve, which is electrically connected to the controller.

[0019] An embodiment of this utility model also provides a vacuum furnace, including a furnace body and the aforementioned control system; a hydraulic cylinder is disposed inside the furnace body, the hydraulic cylinder presses against the parts to be heat-treated inside the furnace body, and the control system is connected to the hydraulic cylinder for adjusting the output pressure at the output end of the hydraulic cylinder.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a control system including a hydraulic oil tank, an adjustment mechanism, a detection mechanism, and a controller. Multiple adjustment mechanisms with progressively decreasing adjustment ranges, installed on the hydraulic pipeline, control the flow rate of hydraulic oil injected into the hydraulic cylinder. Therefore, initial adjustment can be made using the adjustment mechanism with the largest adjustment range to bring the hydraulic cylinder's output pressure close to the desired pressure. Then, the next adjustment mechanism with a decreasing adjustment range will be used for synchronous adjustment until the hydraulic cylinder's output pressure matches the set pressure. If the output pressure exceeds the desired pressure, the adjustment mechanism with the smallest adjustment range can be closed sequentially until the output pressure matches the set pressure, thereby increasing or decreasing the hydraulic cylinder's output pressure. During the adjustment process, the detection mechanism constantly monitors the hydraulic cylinder's output pressure and generates an electrical signal that is transmitted to the controller. The controller then controls the opening and closing of the adjustment mechanisms to improve the accuracy of the hydraulic cylinder's output pressure adjustment and prevent deformation of components pressed by the hydraulic cylinder.

[0022] This utility model provides a vacuum furnace, including a furnace body and the aforementioned control system. The control system is connected to a hydraulic cylinder inside the furnace body. By adjusting the output pressure at the output end of the hydraulic cylinder through the control system, the adjustment accuracy of the hydraulic cylinder output pressure is improved, thereby ensuring the quality of the parts to be heat-treated inside the furnace body and preventing the parts pressed by the hydraulic cylinder from deforming. Attached Figure Description

[0023] 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.

[0024] Figure 1 A schematic diagram of the overall structure of the control system provided in an embodiment of this utility model.

[0025] icon:

[0026] 100-Hydraulic oil tank; 101-Hydraulic pipeline; 102-First regulating valve; 103-Second regulating valve; 104-Hydraulic pump; 105-Hydraulic motor; 106-Return pipe; 107-Relief valve; 108-Solenoid directional valve;

[0027] 200-Hydraulic cylinder;

[0028] 300 - Load cell; 301 - Pressure sensor. Detailed Implementation

[0029] 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.

[0030] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" 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 connection within 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. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] Example 1

[0033] like Figure 1 As shown, this utility model provides a control system for adjusting the output pressure of the output end of the hydraulic cylinder 200 inside the vacuum furnace. The control system includes a hydraulic oil tank 100, an adjustment mechanism, a detection mechanism, and a controller.

[0034] The hydraulic oil tank 100 is connected to the hydraulic cylinder 200 through the hydraulic pipeline 101. Along the extension direction of the hydraulic pipeline 101, the hydraulic pipeline 101 is provided with multiple adjustment mechanisms with successively decreasing adjustment ranges.

[0035] The detection mechanism is located at the output end of the hydraulic cylinder 200 and is used to detect the output pressure of the hydraulic cylinder 200;

[0036] The controller is electrically connected to both the regulating mechanism and the detection mechanism.

[0037] In this embodiment, the control system includes a hydraulic oil tank 100, an adjustment mechanism, a detection mechanism, and a controller. Multiple adjustment mechanisms with progressively decreasing adjustment ranges on the hydraulic pipeline 101 control the flow rate of hydraulic oil injected into the hydraulic cylinder 200. Therefore, the system can first use the adjustment mechanism with the largest adjustment range to initially adjust the output pressure of the hydraulic cylinder 200 to near the required pressure. Then, the next adjustment mechanism with a decreasing adjustment range will be used for synchronous adjustment, continuing until the output pressure of the hydraulic cylinder 200 matches the set pressure. If the output pressure exceeds the required pressure, the adjustment mechanism with the smallest adjustment range can be closed sequentially until the output pressure matches the set pressure, thereby increasing or decreasing the output pressure of the hydraulic cylinder 200. During the adjustment process, the detection mechanism constantly monitors the output pressure of the hydraulic cylinder 200 and generates an electrical signal that is transmitted to the controller. The controller then controls the opening and closing of the adjustment mechanisms to improve the accuracy of the hydraulic cylinder 200 output pressure adjustment and prevent deformation of components pressed by the hydraulic cylinder 200.

[0038] Of course, each of the multiple adjusting mechanisms with progressively decreasing adjustment ranges on the hydraulic pipeline 101 can contain multiple adjusting components, and the adjustment range of the adjusting components within each adjusting mechanism decreases progressively. That is, the adjusting component with the smallest adjustment range in each adjusting mechanism has a larger adjustment range than the adjusting component with the largest adjustment range in the next adjusting mechanism. By cooperating with adjusting components of different adjustment ranges, the output pressure at the output end of the hydraulic cylinder 200 can be precisely controlled. Optionally, the adjusting components can be proportional valves, precision control valves, or other components used to adjust pipeline flow; their purpose remains consistent with the design concept of this utility model and should fall within the protection scope of this utility model.

[0039] According to one embodiment provided by this utility model, such as Figure 1 As shown, the adjustment mechanism includes a first adjustment mechanism and a second adjustment mechanism;

[0040] The first regulating mechanism includes at least one first regulating valve 102, and the second regulating mechanism includes at least one second regulating valve 103. Both the first regulating valve 102 and the second regulating valve 103 are located in the hydraulic pipeline 101.

[0041] In this embodiment, the specific number of the first regulating valve 102 and the second regulating valve 103 can be determined according to actual usage requirements. The adjustment range of the first regulating valve 102 in the first regulating mechanism can decrease sequentially or show an overall downward trend. That is to say, the adjustment range of the first regulating valve 102 with the smallest adjustment range in the first regulating mechanism is larger than that of the second regulating valve 103 with the largest adjustment range in the second regulating mechanism, thereby ensuring that the output pressure of the hydraulic cylinder 200 can be accurately controlled.

[0042] According to one embodiment provided by this utility model, such as Figure 1 As shown, there is one first regulating valve 102 and ten second regulating valves 103.

[0043] In this embodiment, there is one first regulating valve 102 and ten second regulating valves 103. For example, the maximum pressure that the hydraulic cylinder 200 can provide is 100T. The range that the first regulating valve 102 can adjust is 0%-80% opening. The pressure and opening are roughly defined as 0%-80% opening linearly corresponding to 0T-80T, thereby ensuring that the force applied to the load-bearing parts is lower than the set force. The remaining 20T is controlled by the second control valve.

[0044] In other words, the output pressure is first adjusted to be close to the required pressure by the first regulating valve 102, and then the second regulating valves 103 from the first to the tenth are opened in sequence until the output pressure is equivalent to the required pressure. Then the remaining second regulating valves 103 are stopped from opening and the status quo is maintained. As heating proceeds, the pressed parts are heated and expand. The pressure detected by the detection mechanism will exceed the required pressure. At this time, the second regulating valves 103 from the tenth to the first are closed in sequence until the output pressure is equivalent to the required pressure. Then the second regulating valves 103 are stopped from closing and the status quo is maintained.

[0045] According to one embodiment provided by this utility model, such as Figure 1 As shown, the detection mechanism includes a load cell 300, which is located at the output end of the hydraulic cylinder 200. The load cell 300 is used to detect the output pressure of the hydraulic cylinder 200 and is also electrically connected to the controller.

[0046] In this embodiment, a weighing sensor 300 is provided at the output end of the hydraulic cylinder 200 for direct measurement of the output pressure of the hydraulic cylinder 200. The feedback signal can intuitively show the weight value added by the hydraulic cylinder 200 on the pressed part, and generate an electrical signal to be transmitted to the controller so that the controller can adjust the first regulating valve 102 and the second regulating valve 103 to ensure the accuracy of the output pressure.

[0047] According to one embodiment provided by this utility model, such as Figure 1 As shown, the detection mechanism also includes a pressure sensor 301, which is located at the connection between the hydraulic line 101 and the oil inlet of the hydraulic cylinder 200. The pressure sensor 301 is used to detect the oil pressure in the hydraulic line 101 and is electrically connected to the controller.

[0048] In this embodiment, the pressure sensor 301 is used to detect the inlet oil pressure at the oil inlet end of the hydraulic cylinder 200 and generate an electrical signal from the detected data in real time to transmit to the controller, ensuring that the pressure does not exceed the maximum safe pressure allowed by the hydraulic cylinder 200. When the pressure exceeds the limit, an alarm will be triggered and the controller will be used to adjust and stop the delivery of hydraulic oil to stop the pressure delivery and prevent the parts pressed by the hydraulic cylinder 200 from deforming.

[0049] According to one embodiment provided by this utility model, such as Figure 1 As shown, the control system also includes a power mechanism, which is located in the hydraulic pipeline 101 and is used to pump hydraulic oil from the hydraulic oil tank 100 into the hydraulic pipeline 101.

[0050] In this embodiment, power is provided by a power mechanism to pump out the hydraulic oil in the hydraulic oil tank 100 and provide pressure energy, which is injected into the hydraulic cylinder 200 along the hydraulic pipeline 101 to ensure that the output end of the hydraulic cylinder 200 can provide pressure.

[0051] According to one embodiment provided by this utility model, such as Figure 1 As shown, the power mechanism includes a hydraulic pump 104 and a hydraulic motor 105. The hydraulic pump 104 is located in the hydraulic pipeline 101, and the hydraulic motor 105 is connected to the hydraulic pump 104.

[0052] In this embodiment, the hydraulic pump 104 is powered by the hydraulic motor 105 to pump out the hydraulic oil in the hydraulic oil tank 100 and provide pressure energy to ensure that the hydraulic oil can be injected into the hydraulic cylinder 200 along the direction of the hydraulic pipeline 101.

[0053] According to one embodiment provided by this utility model, such as Figure 1 As shown, a return pipe 106 is also provided between the hydraulic pipeline 101 and the hydraulic oil tank 100. The return pipe 106 is equipped with an overflow valve 107, which is electrically connected to the controller.

[0054] In this embodiment, the hydraulic line 101 is also connected to the hydraulic oil tank 100 through a return pipe 106, and an overflow valve 107 is provided on the return pipe 106. Correspondingly, the overflow valve 107 is electrically connected to the controller. The overflow valve 107 can achieve constant pressure overflow, pressure stabilization, system unloading and safety protection. Normally, the overflow valve 107 is in the closed state, but when the controller receives a typical value when the pressure reaches the set amount, it will control the overflow valve 107 to open and allow the hydraulic oil to flow back to the hydraulic oil tank 100.

[0055] According to one embodiment provided by this utility model, such as Figure 1 As shown, the hydraulic pipeline 101 is also equipped with a solenoid directional valve 108, which is electrically connected to the controller.

[0056] In this embodiment, the electromagnetic directional valve 108 installed on the hydraulic line 101 is electrically connected to the controller. The electromagnetic directional valve 108 can control the direction of the hydraulic line 101 to control whether hydraulic oil is injected into the hydraulic cylinder 200. The hydraulic pump 104 provides power through the hydraulic motor 105 to pump out the hydraulic oil in the hydraulic oil tank 100 and provide pressure energy. The hydraulic oil is injected into the hydraulic cylinder along the direction of the hydraulic line 101 through the electromagnetic directional valve 108. When the pressure sensor 301 detects that the pressure in the inlet oil circuit of the hydraulic cylinder 200 is greater than the maximum safe pressure, it issues an alarm and generates an electrical signal to be transmitted to the controller. The controller automatically closes the electromagnetic directional valve 108 and stops the pressure delivery.

[0057] Example 2

[0058] This utility model also provides a vacuum furnace, including a furnace body and the aforementioned control system; a hydraulic cylinder 200 is disposed inside the furnace body, the hydraulic cylinder 200 presses against the parts to be heat-treated inside the furnace body, and the control system is connected to the hydraulic cylinder 200 to adjust the output pressure at the output end of the hydraulic cylinder 200.

[0059] In this embodiment, the vacuum furnace includes a furnace body and the aforementioned control system. The control system is connected to the hydraulic cylinder 200 inside the furnace body. The control system adjusts the output pressure at the output end of the hydraulic cylinder 200 to improve the adjustment accuracy of the output pressure of the hydraulic cylinder 200, thereby ensuring the quality of the parts to be heat-treated inside the furnace body and preventing the parts pressed by the hydraulic cylinder 200 from deforming.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A control system for adjusting the output pressure at the output end of a hydraulic cylinder (200) inside a vacuum furnace, characterized in that, Includes a hydraulic oil tank (100), an adjustment mechanism, a detection mechanism, and a controller; The hydraulic oil tank (100) is connected to the hydraulic cylinder (200) through a hydraulic pipeline (101). Along the extension direction of the hydraulic pipeline (101), the hydraulic pipeline (101) is provided with a plurality of adjustment mechanisms with successively decreasing adjustment ranges. The detection mechanism is located at the output end of the hydraulic cylinder (200) and is used to detect the output pressure of the hydraulic cylinder (200); The controller is electrically connected to both the adjustment mechanism and the detection mechanism.

2. The control system according to claim 1, characterized in that, The adjustment mechanism includes a first adjustment mechanism and a second adjustment mechanism; The first regulating mechanism includes at least one first regulating valve (102), and the second regulating mechanism includes at least one second regulating valve (103). Both the first regulating valve (102) and the second regulating valve (103) are located in the hydraulic pipeline (101).

3. The control system according to claim 2, characterized in that, There is one first regulating valve (102) and ten second regulating valves (103).

4. The control system according to any one of claims 1-3, characterized in that, The detection mechanism includes a weighing sensor (300), which is located at the output end of the hydraulic cylinder (200). The weighing sensor (300) is used to detect the output pressure of the hydraulic cylinder (200), and is electrically connected to the controller.

5. The control system according to claim 4, characterized in that, The detection mechanism also includes a pressure sensor (301), which is located at the connection between the hydraulic pipeline (101) and the oil inlet of the hydraulic cylinder (200). The pressure sensor (301) is used to detect the oil pressure in the hydraulic pipeline (101) and is electrically connected to the controller.

6. The control system according to claim 5, characterized in that, The control system also includes a power mechanism located in the hydraulic pipeline (101) for pumping hydraulic oil from the hydraulic tank (100) into the hydraulic pipeline (101).

7. The control system according to claim 6, characterized in that, The power mechanism includes a hydraulic pump (104) and a hydraulic motor (105). The hydraulic pump (104) is located in the hydraulic pipeline (101), and the hydraulic motor (105) is connected to the hydraulic pump (104).

8. The control system according to claim 7, characterized in that, A return pipe (106) is also provided between the hydraulic pipeline (101) and the hydraulic oil tank (100). The return pipe (106) is equipped with an overflow valve (107), which is electrically connected to the controller.

9. The control system according to claim 8, characterized in that, The hydraulic line (101) is also equipped with an electromagnetic directional valve (108), which is electrically connected to the controller.

10. A vacuum furnace, characterized in that, Includes the furnace body and the control system as described in any one of claims 1-9; The furnace body is equipped with a hydraulic cylinder (200), which presses against the parts to be heat-treated inside the furnace body. The control system is connected to the hydraulic cylinder (200) and is used to adjust the output pressure at the output end of the hydraulic cylinder (200).

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