Energy accumulator pressure automatic detection method and detection device for die casting machine

Abstract

The application discloses a kind of energy storage pressure automatic detection method and detection device for die casting machine, including energy storage, pressure sensor one, liquid controller, drive suctioner, filter, pressure sensor two and liquid tank, multiple energy storages are respectively connected on liquid controller, pressure sensor one is connected between energy storage and liquid controller, liquid controller connects drive suctioner and liquid tank, pressure sensor two is connected between drive suctioner and filter, filter connects liquid tank, by drive suctioner suction hydraulic oil of liquid tank enters energy storage and stores energy, the pressure of the pressure sensor one installed between energy storage and liquid controller is measured to hydraulic oil end, this pressure value is the pressure of energy storage nitrogen, the device structure is ingenious, not only save cost, also improve the precision of measured pressure, it is favorable to the application and promotion of the above detection device and method in pressure detection equipment technical field.

Description

Technical Field

[0001] This invention relates to the field of pressure testing equipment technology, and is a method and device for automatic pressure testing of an energy storage device used in die casting machines. Background Technology

[0002] Existing technologies regarding energy storage pressure detection methods for die-casting machines include: Figure 3 As shown, an existing pressure sensor 8' is installed at the gas end of the energy storage device. The pressure of the existing energy storage device 9' is confirmed by the feedback from this existing pressure sensor 8'. When nitrogen is stored in the existing energy storage device 9', the existing pressure sensor 8' will send the nitrogen pressure in the existing energy storage device 9' back to the computer. This pressure is the default nitrogen pressure of the existing energy storage device 9'. When energy storage is performed, the system provides hydraulic pressure to the existing energy storage device 9'. During this process, the hydraulic oil compresses the nitrogen, thereby increasing the nitrogen pressure. When the pressure feedback from the existing pressure sensor 8' reaches the set energy storage pressure, energy storage stops. The pressure fed back by the existing pressure sensor 8' at this time is the pressure of the existing energy storage device 9'.

[0003] The compressibility of a gas is greatly affected by temperature. Since energy storage is a very rapid process, a large amount of heat is generated when nitrogen is rapidly compressed. Therefore, there is a large error between the reading of the existing pressure sensor 8' detected during energy storage and the actual reading of the existing pressure sensor 8' after it has been left to stand still.

[0004] Because the gas end of the existing energy storage device 9' cannot be connected, each existing energy storage device 9' requires an existing pressure sensor 8'. The cost of the existing pressure sensor 8' is relatively high, and since the existing pressure sensors 8' all provide analog signals, a large number of analog signal channels in the computer are required when there are many existing energy storage devices 9'. Furthermore, analog signals are easily interfered with, resulting in significant deviations. Therefore, it can be seen that the existing technology for detecting the energy storage pressure of die-casting machines is not only prone to large errors but also expensive and unfavorable for pressure detection. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the first objective of this invention is to provide an automatic pressure detection device for an energy storage device used in die-casting machines. This device has an ingenious structure and can obtain the energy storage gas pressure by compressing gas with liquid and measuring the liquid pressure with a pressure sensor. This facilitates the application and promotion of the detection device in the field of pressure detection equipment technology. The second objective of this invention is to provide an automatic pressure detection method for an energy storage device used in die-casting machines. Based on the aforementioned automatic pressure detection device, this method can obtain the energy storage gas pressure by measuring the liquid pressure. The measured pressure is more accurate and, compared with the prior art, is more advantageous for pressure detection by the detection device.

[0006] The aforementioned automatic pressure detection device for an energy storage device in a die-casting machine and the automatic pressure detection method for an energy storage device in a die-casting machine are technically related and belong to the same inventive concept.

[0007] To achieve the first objective mentioned above, the present invention adopts the following technical solution: an automatic pressure detection device for an energy storage device in a die-casting machine, comprising an energy storage device, a pressure sensor one, a liquid controller, a drive suction device, a filter, a pressure sensor two, and a liquid storage tank; multiple energy storage devices are respectively connected to the liquid controller, and the pressure sensor one is connected between the energy storage device and the liquid controller for detecting the liquid pressure of the energy storage device; the liquid controller is connected to the drive suction device and the liquid storage tank for controlling the liquid flow between the liquid storage tank and the drive suction device and the energy storage device respectively; the pressure sensor two is connected between the drive suction device and the filter for detecting the liquid supply pressure of the drive suction device; the filter is connected to the liquid storage tank.

[0008] As a preferred embodiment of the present invention, the energy storage device includes a gas storage section, a liquid storage section and a flexible partition, wherein the gas storage section is connected to the liquid storage section and is located above the liquid storage section.

[0009] As a preferred embodiment of the present invention, the flexible partition is provided between the gas storage section and the liquid storage section.

[0010] In a preferred embodiment of the present invention, the lower end of the liquid storage section is connected to the liquid controller.

[0011] In a preferred embodiment of the present invention, the liquid storage section is used to fill the pressure-measuring liquid.

[0012] In a preferred embodiment of the present invention, the liquid storage tank is connected to the liquid controller via a pipeline for depressurizing the liquid in the energy storage device.

[0013] In a preferred embodiment of the present invention, the drive suction device includes a drive motor and a suction machine, wherein the drive motor is mounted on the suction machine.

[0014] Compared with existing technologies, it has the following beneficial effects: 1. An automatic pressure detection device for a die-casting machine's accumulator includes an accumulator, a pressure sensor one, a liquid controller, a drive suction device, a filter, a pressure sensor two, and a storage tank. Multiple accumulators are connected to the liquid controller. The pressure sensor one is connected between the accumulators and the liquid controller. The liquid controller is connected to the drive suction device and the storage tank. The pressure sensor two is connected between the drive suction device and the filter. The filter is connected to the storage tank. The drive suction device draws liquid from the storage tank into the accumulator. The pressure at the liquid end is measured by the pressure sensor one installed between the accumulator and the liquid controller, thereby obtaining the gas pressure of the accumulator. The ingenious structure improves the accuracy of the measured pressure and facilitates the application and promotion of this detection device in the field of pressure detection equipment technology.

[0015] 2. The pressure sensor of this device is installed between the energy storage unit and the liquid controller. Compared with the existing technology that installs a pressure sensor on each energy storage unit, it saves the cost of the device. Moreover, the pressure measured by gas pressure measurement is prone to fluctuation, while this device measures the pressure at the liquid end, thereby obtaining the gas pressure, and the measured value is more accurate.

[0016] 3. The liquid controller of this device can control the flow of liquid. When storing energy, the channel from the liquid controller to the energy storage device is opened, and the liquid flows into the energy storage device. After the pressure test is completed, the channel from the liquid controller to the storage tank is opened, and the liquid flows into the storage tank, so that the flow of liquid forms a loop.

[0017] 4. The device's drive suction unit includes a drive motor and a suction machine. The drive motor drives the suction machine to move, drawing liquid from the storage tank into the energy storage unit. This provides the energy storage unit with liquid at a set pressure, ensuring the stability of the pressure measurement process.

[0018] 5. The energy storage device includes a gas storage section, a liquid storage section, and a flexible partition. By compressing the gas in the gas storage section with the liquid in the liquid storage section, the gas generates a reaction force on the liquid. The pressure at the liquid end is measured by a pressure sensor, thereby obtaining the gas pressure. The process is simple and improves the efficiency of workers.

[0019] To achieve the second objective mentioned above, the present invention adopts the following technical solution: an automatic pressure detection method for an energy storage device in a die-casting machine, based on an automatic pressure detection device for an energy storage device in a die-casting machine, comprising the following steps: Step S1: When energy storage begins, the liquid controller is turned on, and the drive suction device is activated to supply liquid to the energy storage device at a supply pressure P1, so that the liquid flows into the energy storage device to compress the gas storage section for energy storage; Step S2: Pressure sensor one detects that the liquid pressure of the energy storage device reaches the supply pressure P1 of the drive suction device and remains unchanged for 1 second, then proceeds to step S3; Step S3: The drive suction device supplies liquid to the energy storage device at a supply pressure P2, while the pressure sensor one detects the liquid pressure of the energy storage device; if the liquid pressure of the energy storage device is 100m... If the liquid supply pressure P2 is reached within 1 second, proceed to step S4; if the liquid pressure of the energy storage device does not reach the liquid supply pressure P2 within 100 ms, proceed to step S5; Step S4: Adjust the liquid supply pressure P2 of the drive suction device = P2 + ΔP, and then return to step S3; Step S5: If the liquid supply pressure P2 is not greater than the standard pressure P0 of the gas storage section at this time, inflate the gas storage section of the energy storage device and then return to step S3; If the liquid supply pressure P2 is greater than the standard pressure P0 of the gas storage section, adjust ΔP = ΔP / 2; If ΔP is greater than 1 bar, adjust the liquid supply pressure P2 of the drive suction device = P2 - ΔP and then return to step S3; If ΔP is not greater than 1 bar, record the pressure of the gas storage section as the liquid supply pressure P2 at this time.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The automatic pressure detection method for the accumulator of the die casting machine of the present invention, compared with the prior art of measuring the pressure on each accumulator, obtains the gas pressure by measuring the pressure at the liquid end of the accumulator, which not only saves costs but also improves the measurement accuracy, and is conducive to the promotion and application of the above detection method in the field of pressure detection equipment technology. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an automatic pressure detection device for an energy storage device used in a die-casting machine, as described in the embodiment. Figure 2 This is a flowchart illustrating an automatic pressure detection method for an energy storage device in a die-casting machine, as described in this embodiment. Figure 3 This is a schematic diagram of the structure of an automatic pressure detection device for an energy storage device used in a die-casting machine in the prior art.

[0022] Reference numerals in the attached drawings: 1. Energy storage unit; 1-1. Gas storage unit; 1-2. Liquid storage unit; 1-3. Flexible partition; 2. Pressure sensor one; 3. Liquid controller; 4. Drive suction device; 4-1. Drive motor; 4-2. Suction device; 5. Filter; 6. Liquid storage tank; 7. Pressure sensor two; 8'. Existing pressure sensor; 9'. Existing energy storage unit; 10'. Existing energy storage valve; 11'. Existing oil pump motor; 12'. Existing oil filter; 13'. Existing oil tank. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] Example 1: As Figures 1 to 2 As shown, an automatic pressure detection device for an accumulator in a die-casting machine mainly consists of an accumulator 1, a pressure sensor 2, a liquid controller 3, a drive suction device 4, a filter 5, a pressure sensor 7, and a storage tank 6. The three accumulators 1 are respectively connected to the liquid controller 3, which is a solenoid directional valve that controls the flow of liquid (hydraulic oil) in the accumulators 1. The pressure sensor 2 is connected between the accumulators 1 and the liquid controller 3 to measure the pressure of the hydraulic oil in the accumulators 1. The liquid controller 3 is connected to the drive suction device 4, which is an oil pump motor. The drive suction device 4 draws hydraulic oil from the storage tank 6 and inputs it into the accumulators 1. The connection between the liquid controller 3 and the storage tank 6 ensures that the hydraulic oil flowing out of the accumulators 1 after pressure measurement enters the storage tank 6 through the liquid controller 3. The pressure sensor 7 is connected between the drive suction device 4 and the filter 5 to display the pressure of the hydraulic oil drawn by the drive suction device 4, which is the accumulator pressure set by the operator. The filter 5 is connected to the reservoir 6. The filter 5 contains a filter screen to filter impurities in the hydraulic oil and prevent blockage in the pipeline. The entire device is sequentially connected via the accumulator 1, pressure sensor 2, liquid controller 3, drive suction device 4, filter 5, pressure sensor 7, and reservoir 6. The reservoir 6 and liquid controller 3 are then connected to form a loop, allowing hydraulic oil to be drawn into the accumulator 1 by the drive suction device 4 during pressure measurement. After pressure measurement, the hydraulic oil in the accumulator 1 flows back to the reservoir 6, enabling the hydraulic oil to be recycled. This detection device has an ingenious structure; by measuring the pressure at the liquid end of the accumulator 1, it obtains the gas pressure value, improving the accuracy and efficiency of measuring the gas pressure value of the accumulator.

[0025] The energy storage device 1 in this embodiment includes a gas storage section 1-1, a liquid storage section 1-2, and a flexible partition 1-3. The gas storage section 1-1 is located above the liquid storage section 1-2, and the flexible partition 1-3 is installed between them. The flexible partition 1-3 is a leather partition and has elasticity. The liquid storage section 1-2 is used to fill hydraulic oil, and its lower end is connected to the liquid controller 3 through a pipeline. The gas storage section 1-1 is used to fill nitrogen. The entire energy storage device 1 mainly compresses the nitrogen in the gas storage section 1-1 through the hydraulic oil in the liquid storage section 1-2, and the nitrogen in turn has a reaction force on the hydraulic oil. The pressure of the hydraulic oil in the liquid storage section 1-2 is measured by a pressure sensor 2 installed between the energy storage device 1 and the liquid controller 3, and the nitrogen pressure in the gas storage section 1-1 is the pressure value measured by the pressure sensor 2.

[0026] The existing detection device connects a pressure sensor 8' to the gas storage section of each existing energy storage unit 9'. During energy storage, the system provides hydraulic pressure to the existing energy storage unit 9'. In this process, the hydraulic oil compresses nitrogen, thereby increasing the nitrogen pressure. When the pressure feedback from the pressure sensor 8' reaches the set energy storage pressure, energy storage stops. The pressure feedback from the pressure sensor 8' at this point is the gas pressure. The existing technology has two problems. First, the compression ratio of nitrogen is greatly affected by temperature. Energy storage is a very rapid process, and the rapid compression of nitrogen generates a large amount of heat. Therefore, the reading of the pressure sensor 8' detected during energy storage has a significant error compared to the actual reading after resting. Second, the gas end of the existing energy storage unit 9' cannot be connected, so each existing energy storage unit 9' requires one pressure sensor 8'. This results in a significant cost for the pressure sensor 8'. Furthermore, the pressure sensor 8' uses analog signals, which, when there are many existing energy storage units 9', requires a large number of analog signal channels in the computer. Also, analog signals are easily interfered with, leading to significant deviations. Compared with existing detection devices, this device installs pressure sensor 2 between the energy storage unit 1 and the liquid controller 3. Only one pressure sensor 2 is needed to measure the pressure values ​​of the three energy storage units 1, saving device costs. Furthermore, pressure sensor 2 measures the pressure of the hydraulic oil in the energy storage unit 1. The pressure of hydraulic oil is relatively stable and not easily affected by factors such as temperature. The measured pressure value is the pressure value of nitrogen in the energy storage unit 1, which improves the measurement accuracy.

[0027] The drive suction device 4 in this embodiment includes a drive motor 4-1 and a suction machine 4-2. The drive motor 4-1 is connected to the suction machine 4-2. The drive motor 4-1 is an electric motor. Starting the drive motor 4-1 drives the suction machine 4-2 to draw hydraulic oil from the storage tank 6. The operator can adjust the operating power of the drive suction device 4 to change the speed of hydraulic oil suction, thereby enabling the hydraulic oil to reach the set pressure. The drive suction device 4 in the device can provide a stable pressure for supplying oil to the energy storage device 1, improving the stability of the measured gas pressure.

[0028] An automatic pressure detection method for an energy storage device in a die-casting machine includes the following steps: Step S1: When energy storage begins, turn on the liquid controller 3 and turn on the drive suction device 4 to supply liquid to the energy storage device 1 at the liquid supply pressure P1, so that the liquid flows into the energy storage device 1 to compress the gas storage section 1-1 for energy storage. Step S2: Pressure sensor 2 detects that the liquid pressure of the energy storage device 1 reaches the liquid supply pressure P1 of the drive suction device 4 and does not decrease for 1 second, then proceeds to step S3. Step S3: The drive suction device 4 supplies liquid to the energy storage device 1 at the supply pressure P2, and at the same time, the pressure sensor 2 detects the liquid pressure of the energy storage device 1; if the liquid pressure of the energy storage device 1 reaches the supply pressure P2 within 100ms, then proceed to step S4; if the liquid pressure of the energy storage device 1 does not reach the supply pressure P2 within 100ms, then proceed to step S5. Step S4: Adjust the liquid supply pressure P2 = P2 + ΔP of the drive suction device 4, and then return to step S3; Step S5: If the liquid supply pressure P2 is not greater than the standard pressure P0 of the gas storage section at this time, the gas storage section of the energy storage device is charged and then the process returns to step S3. If the liquid supply pressure P2 is greater than the standard pressure P0 of the gas storage section, adjust ΔP = ΔP / 2: if ΔP is greater than 1 bar, then adjust the liquid supply pressure P2 of the drive suction device 4 to P2 = P2 - ΔP, and return to step S3; if ΔP is not greater than 1 bar, then record the pressure of the gas storage section as the liquid supply pressure P2 at this time.

[0029] Following the above method, the pressure detection accuracy of energy storage device 1 can eventually reach 1 bar, meeting the operating conditions.

[0030] This embodiment provides an automatic pressure detection device for a die-casting machine's accumulator. The device uses a drive absorber 4 to draw hydraulic oil from the storage tank 6 into the accumulator 1. A pressure sensor 2, installed between the accumulator 1 and the liquid controller 3, measures the pressure at the hydraulic oil end. This pressure value is the nitrogen pressure in the accumulator 1. This ingenious device not only saves costs but also improves the accuracy of the measured pressure, facilitating its application and promotion in the field of pressure detection equipment technology.

[0031] Example 2: The difference between this example and Example 1 is that the automatic pressure detection device for the accumulator of a die-casting machine in this example replaces the liquid controller 3 with two check valves, which are respectively installed between the accumulator 1 and the drive suction device 4 and between the accumulator 1 and the storage tank 6. The flow of hydraulic oil into the accumulator 1 can be controlled by the check valve, and the flow into the storage tank 6 can be controlled by the other check valve, thereby realizing the control of the overall flow of hydraulic oil.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0033] Although this document frequently uses the following reference numerals from the figures: 1, accumulator; 1-1, gas storage section; 1-2, liquid storage section; 1-3, flexible partition; 2, pressure sensor one; 3, liquid controller; 4, drive suction device; 4-1, drive motor; 4-2, suction device; 5, filter; 6, liquid storage tank; 7, pressure sensor two; 8', existing pressure sensor; 9', existing accumulator; 10', existing accumulator valve; 11', existing oil pump motor; 12', existing oil filter; 13', existing oil tank, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. An automatic pressure detection method for an energy storage device used in a die-casting machine, based on an automatic pressure detection device for an energy storage device used in a die-casting machine, characterized in that: The automatic pressure detection device for the accumulator of the die-casting machine includes an accumulator (1), a pressure sensor (2), a liquid controller (3), a drive suction device (4), a filter (5), a pressure sensor (7), and a storage tank (6); multiple accumulators (1) are respectively connected to the liquid controller (3), and the pressure sensor (2) is connected between the accumulator (1) and the liquid controller (3) to detect the liquid pressure of the accumulator (1); the liquid controller (3) is connected to the drive suction device (4) and the storage tank (6) for... The liquid flow between the liquid storage tank (6) and the driving suction device (4) and the energy storage device (1) is controlled; the pressure sensor 2 (7) is connected between the driving suction device (4) and the filter (5) to detect the liquid supply pressure of the driving suction device (4); the filter (5) is connected to the liquid storage tank (6); the energy storage device (1) includes a gas storage part (1-1), a liquid storage part (1-2) and a soft partition (1-3), the gas storage part (1-1) is connected to the liquid storage part (1-2) and is located above the liquid storage part (1-2); Includes the following steps: Step S1: When starting energy storage, turn on the liquid controller (3) and turn on the drive suction device (4) to supply liquid to the energy storage device (1) at the liquid supply pressure P1, so that the liquid flows into the energy storage device (1) to compress the gas storage section (1-1) for energy storage. Step S2: Pressure sensor 1 (2) detects that the liquid pressure of the energy storage device (1) reaches the liquid supply pressure P1 of the driving suction device (4) and does not decrease for 1 second, then proceeds to step S3. Step S3: The drive suction device (4) supplies liquid to the energy storage device (1) at the supply pressure P2, and at the same time, the pressure sensor (2) detects the liquid pressure of the energy storage device (1); if the liquid pressure of the energy storage device (1) reaches the supply pressure P2 within 100ms, then step S4 is executed; if the liquid pressure of the energy storage device (1) does not reach the supply pressure P2 within 100ms, then step S5 is executed. Step S4: Adjust the liquid supply pressure of the drive suction device (4) to P2+ΔP, and then return to step S3; Step S5: If the liquid supply pressure P2 is not greater than the standard pressure P0 of the gas storage section at this time, the gas storage section of the energy storage device is charged and then the process returns to step S3. If the liquid supply pressure P2 is greater than the standard pressure P0 of the gas storage section, adjust the value of △P to △P / 2: if △P is greater than 1 bar after adjustment, then adjust the liquid supply pressure of the drive suction device (4) to P2-△P and return to step S3; if △P is not greater than 1 bar after adjustment, then record the pressure of the gas storage section as the liquid supply pressure P2 at this time.

2. The automatic pressure detection method for an energy storage device in a die-casting machine according to claim 1, characterized in that: The flexible partition (1-3) is installed between the gas storage section (1-1) and the liquid storage section (1-2).

3. The automatic pressure detection method for an energy storage device in a die-casting machine according to claim 2, characterized in that: The lower end of the liquid storage section (1-2) is connected to the liquid controller (3).

4. The automatic pressure detection method for an energy storage device in a die-casting machine according to claim 3, characterized in that: The liquid storage section (1-2) is used to fill the pressure-measuring liquid.

5. The automatic pressure detection method for an energy storage device in a die-casting machine according to claim 1, characterized in that: The liquid storage tank (6) is connected to the liquid controller (3) via a pipeline for depressurizing the liquid in the energy storage device (1).

6. The automatic pressure detection method for an energy storage device in a die-casting machine according to claim 1, characterized in that: The drive suction device (4) includes a drive unit (4-1) and a suction unit (4-2), wherein the drive unit (4-1) is mounted on the suction unit (4-2).

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