An air compressor pressure regulation system
By combining the continuously variable transmission engine and intake/exhaust valves for adjustment, the problems of high oil consumption and unstable pressure of the air compressor are solved, achieving pressure stability and safety of the rock drill, and reducing oil consumption and the risk of system overpressure.
Patent Information
- Application Number
- CN202522200263.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-10-17
AI Technical Summary
When existing air compressors are used with rock drills, they consume a lot of oil and the actual pressure is often much higher than the predetermined pressure, which can lead to system overpressure or shutdown, resulting in poor safety and stability.
The system uses a continuously variable transmission (CVT) engine to control the maximum intake volume of the air compressor. Combined with the adjustment of the intake and exhaust valves, it monitors pressure changes in real time. By fine-tuning the intake valve opening and rapid exhaust, it maintains stable pressure, reduces fuel consumption, and minimizes the risk of system overpressure.
It achieves pressure stability and safety under load changes, reduces fuel consumption, avoids system overpressure and machine shutdown, and improves the working stability and safety of the rock drill.
Smart Images
Figure CN224943898U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air compressor technology, and specifically to an air compressor pressure regulation system. Background Technology
[0002] The air compressor is the "heart" and "power source" of the rock drill's working system, providing the rock drill with continuous, stable, and high-pressure compressed air.
[0003] When a rock drill is working, it needs to maintain a stable pressure at the target value. However, since the working pressure of a rock drill is related to the load, the pressure will vary depending on the load, even with the same air intake. Therefore, the air intake of the rock drill needs to be adjusted according to changes in the load to stabilize the pressure.
[0004] The current method for adjusting air compressor pressure involves first adjusting the engine speed to a predetermined level, then fixing the engine speed, which means the maximum air intake volume of the air compressor is fixed. The actual air intake volume is then adjusted by regulating the opening of the intake valve to control the pressure. This method has the following problems: First, there may be a significant deviation between the engine's maximum air intake volume and the actual air intake volume, resulting in higher fuel consumption. Second, under complex operating conditions, the actual pressure may be much higher than the predetermined pressure, causing system overpressure, triggering the safety valve to release air, or causing the machine to shut down. Utility Model Content
[0005] 1. The problem to be solved In view of the problems of high oil consumption and the serious damage to air compressors caused by actual pressure being much higher than the predetermined pressure in the existing technology, this utility model provides an air compressor pressure regulation system that can reduce oil consumption and quickly reduce actual pressure.
[0006] 2. Technical Solution To solve the above problems, the technical solution adopted by this utility model is as follows: This utility model provides an air compressor pressure regulating system, comprising: The engine provides power to the air compressor, thereby controlling the maximum intake air volume of the air compressor; An air compressor, connected to the engine drive, is used to compress air and input high-pressure air into a pressure vessel; A pressure vessel, connected to the outlet of the air compressor, is used to buffer high-pressure air; An intake valve is installed on the intake pipe of the air compressor and is used to control and adjust the actual intake volume of the air compressor in order to adjust the air pressure in the pressure vessel. The engine is configured as a continuously variable transmission engine, used to linearly adjust the maximum intake volume of the air compressor; It also includes an exhaust valve, which is connected to the pressure vessel and is used to discharge high-pressure gas from the pressure vessel to quickly reduce the gas pressure inside the pressure vessel.
[0007] As a preferred embodiment of the utility model, a second pressure sensor is also installed on the pressure vessel for real-time monitoring of the air pressure inside the pressure vessel. The second pressure sensor is communicatively connected to the intake valve and the second pressure sensor is communicatively connected to the exhaust valve.
[0008] As a preferred embodiment of the utility model, an air filter element is also installed on the air intake pipe. The air filter element is located upstream of the airflow of the air intake valve and is used to filter the gas entering the air compressor.
[0009] As a preferred embodiment of the utility model, a check valve is also installed between the air filter element and the air compressor, the check valve being used to prevent air compressor oil from being sprayed into the air filter element.
[0010] As a preferred embodiment of the utility model, a pressure sensor is provided downstream of the airflow of the intake valve to monitor whether the intake valve is allowing air in.
[0011] As a preferred embodiment of the utility model, the air filter, the intake valve, the pressure sensor, and the check valve are arranged sequentially along the intake direction.
[0012] As a preferred embodiment of the utility model, a muffler is also connected to the exhaust port of the exhaust valve to eliminate noise during exhaust.
[0013] As a preferred embodiment of the utility model, the pressure vessel is also equipped with a minimum pressure valve to ensure that the working pressure inside the oil-gas system of the air compressor pressure regulation system is not lower than the set minimum value.
[0014] As a preferred embodiment of the utility model, the pressure vessel is also equipped with a safety valve.
[0015] As a preferred embodiment of the utility model, the intake valve is configured as an intake butterfly valve, and the exhaust valve is configured as an exhaust ball valve.
[0016] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The engine is set as a continuously variable transmission engine, which can steplessly adjust the maximum intake volume of the air compressor. Under the condition of constant load, the rated pressure value corresponding to the maximum intake volume of the engine is close to the target pressure value. During the operation of the rock drill, it is only necessary to make a fine adjustment to the opening of the intake valve according to the changes in load and working conditions to keep the actual pressure value within the range of the target pressure value, reduce the deviation between the actual intake volume and the maximum intake volume, and reduce fuel consumption.
[0017] (2) When the actual pressure value is much greater than the target pressure value, quickly reduce the opening of the air inlet valve and at the same time quickly open the exhaust valve. By quickly reducing the air intake and quickly exhausting the air, the actual pressure value in the pressure vessel can be quickly reduced to below the dangerous pressure value, thus maintaining the stability of the system. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the pressure regulation system in this utility model; Figure 2 This is a schematic diagram showing the magnitude of each pressure value in this utility model.
[0019] Explanation of the labels in the diagram: 101. Air filter; 102. Intake valve; 103. Pressure sensor one; 104. Check valve; 105. Air compressor; 106. Engine; 107. Pressure vessel; 108. Exhaust valve; 109. Pressure sensor two; 110. Minimum pressure valve; 111. Safety valve; 112. Muffler. Detailed Implementation
[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.
[0021] The structures, proportions, and sizes illustrated in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.
[0022] This embodiment provides an air compressor pressure regulation system, including: an engine 106, an air compressor 105, a pressure vessel 107, an intake valve 102, and an exhaust valve 108.
[0023] in: The engine 106 is connected to the air compressor 105. The engine 106 is used to provide power to the air compressor 105 and control the maximum air intake of the air compressor 105. The air compressor 105 is used to compress air and input high-pressure air into the pressure vessel 107.
[0024] Pressure vessel 107 is connected to the outlet of air compressor 105 to buffer high-pressure air.
[0025] The intake valve 102 is installed on the intake pipe of the air compressor 105 and is used to control and adjust the actual intake volume of the air compressor 105 in order to regulate the air pressure in the pressure vessel 107.
[0026] The exhaust valve 108 is connected to the pressure vessel 107 and is used to discharge the high-pressure gas inside the pressure vessel 107 to quickly reduce the gas pressure inside the pressure vessel 107.
[0027] The aforementioned engine 106 is configured as a continuously variable transmission (CVT) engine, which can linearly adjust the maximum intake volume of the air compressor 105. Under constant load, it makes the rated pressure value corresponding to the maximum intake volume of the air compressor 105 close to the target pressure value. During the operation of the rock drill, it is only necessary to make a fine adjustment to the opening of the intake valve 102 according to the changes in load and working conditions to keep the actual pressure value within the target pressure value range, reduce the deviation between the actual intake volume and the maximum intake volume, and reduce fuel consumption.
[0028] The pressure regulation system in this embodiment has the following adjustment mode: When the actual pressure value is less than the target pressure value, the opening of the intake valve 102 is increased to increase the actual intake volume of the air compressor 105, thereby increasing the actual pressure value and making the actual pressure value approach the target pressure value.
[0029] When the actual pressure value is greater than the target pressure value, the opening of the intake valve 102 is reduced to decrease the actual intake volume of the air compressor 105, thereby reducing the actual pressure value and making the actual pressure value approach the target pressure value.
[0030] When the actual pressure value is much greater than the target pressure value, that is, when the actual pressure value has exceeded the set dangerous pressure value, the opening of the air inlet valve 102 is quickly reduced, and the exhaust valve 108 is quickly opened. By rapidly reducing the air intake and quickly venting the air, the actual pressure value in the pressure vessel 107 is quickly reduced to below the dangerous pressure value, thereby reducing the risk of system overpressure.
[0031] In one implementation, a reasonable pressure range can be set based on the target pressure value. When the target pressure value is within this range, and the actual pressure value is also within the range, the impact on the rock drill's operation is minimal. Therefore, there is no need to adjust the air intake, avoiding frequent adjustments to the air intake valve 102, which helps improve the stability of the rock drill's operation. The adjustment method for the pressure regulation system in this case is as follows: Input the maximum intake air volume of the air compressor pressure regulation system during operation. Under constant load, the pressure value corresponding to the maximum intake air volume is the rated pressure value. Figure 2 The blue line in the figure represents the rated pressure value, which is the engine speed at which the engine reaches its maximum intake air volume. Input the target pressure value that the air compressor pressure regulation system needs to achieve when it is working. Figure 2 The green line in the image represents the target pressure value, and the actual pressure range is set ( Figure 2 The two yellow lines in the diagram represent the upper and lower limits of the pressure range, and the target pressure value is located within the pressure range. Input the dangerous pressure value of the air compressor pressure regulation system during operation ( Figure 2 The red line in the image represents the dangerous pressure value. Adjust the opening of the intake valve 102 so that the actual pressure value approaches the target pressure value and falls within the pressure value range; If, in actual operation, changes in load or working conditions cause the actual pressure value to exceed the upper limit of the pressure range, then the opening of the intake valve 102 should be reduced to decrease the intake volume, thereby lowering the actual pressure value. If, in actual operation, changes in load or working conditions cause the actual pressure value to be lower than the lower limit of the pressure value range, then the opening of the intake valve 102 is increased to increase the intake volume and thus increase the actual pressure value. If, during actual operation, changes in load or working conditions cause the actual pressure value to exceed the dangerous pressure value, quickly reduce the opening of the butterfly valve and simultaneously open the exhaust valve 108 to rapidly reduce the actual pressure value; once the actual pressure value is lower than the dangerous pressure value, close the exhaust valve 108.
[0032] In one embodiment, a second pressure sensor 109 is also installed on the pressure vessel 107. The second pressure sensor 109 is used to monitor the air pressure inside the pressure vessel 107 in real time. Both the inlet valve 102 and the exhaust valve 108 are communicatively connected to the second pressure sensor 109. Based on the actual pressure value monitored by the second pressure sensor 109, the opening degree of the inlet valve 102 is determined to be either not adjusted, increased, or decreased, and whether the exhaust valve 108 is opened is determined accordingly. Specifically, a PLC controller can be used for communication control.
[0033] In one embodiment, an air filter element 101 is also installed on the intake pipe. The air filter element 101 is located upstream of the airflow of the intake valve 102 and is used to filter the gas entering the air compressor 105 to prevent impurities and particles in the air from entering the air compressor 105 and to protect the air compressor 105.
[0034] It should be noted that the basis for determining whether the airflow is upstream or downstream is the direction of gas flow during operation. The side that is relatively further back in the direction of gas flow is downstream, and the side that is relatively forward in the direction of gas flow is upstream.
[0035] In one embodiment, a check valve 104 is also installed between the air filter 101 and the air compressor 105. When the air compressor 105 is working, the check valve 104 is open; when the air compressor 105 stops, the check valve 104 is closed; the check valve 104 can prevent oil from the air compressor 105 from being sprayed into the air filter 101 during an emergency stop.
[0036] In one embodiment, a pressure sensor 103 is installed downstream of the airflow of the intake valve 102. When the intake valve 102 is open during operation, there should be a fluctuation in the air pressure downstream of the intake valve 102. The pressure fluctuation can be monitored by the pressure sensor 103 to determine whether the intake valve 102 is taking in air, which serves as the basis for determining whether the intake valve 102 is working properly.
[0037] In one embodiment, the air filter 101, intake valve 102, pressure sensor 103, and check valve 104 are arranged sequentially along the intake direction. In this configuration, the check valve 104 is closest to the air inlet of the air compressor 105, preventing oil from the air compressor 105 from splashing onto the intake valve 102, pressure sensor 103, and air filter 101 during an emergency stop. Simultaneously, the pressure sensor 103, located between the intake valve 102 and the check valve 104, allows for faster monitoring of pressure changes downstream of the intake valve 102.
[0038] In one embodiment, a muffler 112 is also connected to the exhaust port of the exhaust valve 108 to eliminate noise during exhaust.
[0039] In one embodiment, a minimum pressure valve 110 is also installed on the pressure vessel 107 to ensure that the working pressure of the air compressor pressure regulation system is not lower than the set minimum value.
[0040] In one embodiment, a safety valve 111 is also installed on the pressure vessel 107.
[0041] In one embodiment, the intake valve 102 is configured as an intake butterfly valve, and the exhaust valve 108 is configured as an exhaust ball valve.
[0042] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. An air compressor pressure regulating system, comprising: An engine (106) is used to power an air compressor (105) to control the maximum intake volume of the air compressor (105); An air compressor (105) is connected to an engine (106) for compressing air and inputting high-pressure air into a pressure vessel (107); A pressure vessel (107), connected to the air compressor (105), is used to buffer high-pressure air; An intake valve (102) is installed on the intake pipe of the air compressor (105) to adjust the actual intake volume of the air compressor (105); Its features are: The engine (106) is configured as a continuously variable transmission engine, used to linearly adjust the maximum intake volume of the air compressor (105); It also includes an exhaust valve (108), which is connected to the pressure vessel (107) and is used to discharge high-pressure gas in the pressure vessel (107) to quickly reduce the gas pressure in the pressure vessel (107).
2. The air compressor pressure regulating system according to claim 1, characterized in that: Pressure sensor 2 (109) is also installed on the pressure vessel (107) for real-time monitoring of the air pressure inside the pressure vessel (107); The second pressure sensor (109) is communicatively connected to the intake valve (102) and the exhaust valve (108).
3. The air compressor pressure regulating system according to claim 1, characterized in that: An air filter (101) is also installed on the intake pipe, and the air filter (101) is located upstream of the airflow of the intake valve (102).
4. The air compressor pressure regulating system according to claim 3, characterized in that: A check valve (104) is also installed between the air filter (101) and the air compressor (105).
5. The air compressor pressure regulating system according to claim 4, characterized in that: A pressure sensor (103) is installed downstream of the airflow of the air intake valve (102) to monitor whether the air intake valve (102) is taking in air.
6. The air compressor pressure regulating system according to claim 5, characterized in that: The air filter (101), the intake valve (102), the pressure sensor (103), and the check valve (104) are arranged sequentially along the intake direction.
7. The air compressor pressure regulating system according to claim 1, characterized in that: A muffler (112) is also connected to the exhaust port of the exhaust valve (108).
8. The air compressor pressure regulating system according to claim 1, characterized in that: The pressure vessel (107) is also equipped with a minimum pressure valve (110).
9. The air compressor pressure regulating system according to claim 1, characterized in that: The pressure vessel (107) is also equipped with a safety valve (111).
10. The air compressor pressure regulating system according to claim 1, characterized in that: The intake valve (102) is configured as an intake butterfly valve, and the exhaust valve (108) is configured as an exhaust ball valve.