Negative pressure stepless automatic adjusting mechanism
By designing the negative pressure stepless automatic adjustment mechanism, using electrical continuous control and PLC controller, the problem of negative pressure control relying on manual mechanical valves is solved, and the fully automated application of negative pressure and stable output is realized, improving the efficiency of automated pneumatic control .
Patent Information
- Application Number
- CN202420229761.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-30
AI Technical Summary
In the existing pneumatic control technology, negative pressure control mainly relies on manual mechanical valves, limiting the fully automated application of negative pressure in equipment, and lacking an effective negative pressure stepless automatic adjustment mechanism.
A negative pressure stepless automatic adjustment mechanism is designed, and the electrical continuous control method is adopted. Through the control center, relay, on-off shutoff valve, throttle valve and air-controlled negative pressure pressure regulating valve, combined with the negative pressure sensor and the PLC controller, the Output and automatic adjustment of any value of negative pressure.
It realizes fully automated control of negative pressure, replaces manual mechanical adjustment method, and is widely used in the field of automated pneumatic control, providing a stable proportional output of negative pressure source.
Smart Images
Figure CN222185269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automated pneumatic control, in particular to a negative pressure stepless automatic regulating mechanism. Background Art
[0002] At present, with the rapid development of automation field, pneumatic control technology is constantly developing. In terms of pneumatic control, automatic control technology is mainly realized through pneumatic valve bodies with various functions. At present, the transmission medium of most pneumatic valve bodies is compressed air (which is greater than atmospheric pressure), while there are few that control negative pressure (which is lower than atmospheric pressure). Manual mechanical valves are generally used, which greatly limits the fully automated application of negative pressure in equipment. Utility Model Content
[0003] The utility model aims to realize a negative pressure stepless automatic regulating mechanism with an output of any negative pressure value through an electrical continuous control method, which will be beneficial to the full automation application in the field of negative pressure.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] The negative pressure stepless automatic adjustment mechanism is characterized in that it includes a control center, two relays are connected to the control center and respectively control a No. 1 on-off stop valve and a No. 2 on-off stop valve, the No. 1 on-off stop valve and the No. 2 on-off stop valve are respectively connected to throttle valves, one of the throttle valves controls the No. 1 on-off stop valve to be connected to compressed gas, and the other throttle valve controls the No. 2 on-off stop valve to exhaust, the No. 1 on-off stop valve and the No. 2 on-off stop valve are interconnected and connected to a gas-controlled negative pressure regulating valve in the middle, a negative pressure sensor is connected to the working end of the gas-controlled negative pressure regulating valve, and the negative pressure sensor is connected to the control center.
[0006] According to a preferred technical solution, the air-controlled negative pressure regulating valve is also connected to a negative pressure source.
[0007] According to a preferred technical solution, the control center is a PLC controller.
[0008] In a preferred technical solution, the ideal gas at the working end of the gas-controlled negative pressure regulating valve satisfies the following ideal gas equation:
[0009] pV=nRT
[0010] Where p is the pressure of the ideal gas; V is the volume of the ideal gas; n is the amount of gas; T is the thermodynamic temperature of the ideal gas; R is the ideal gas constant
[0011] The isochoric process of the ideal gas state equation (V is constant), which satisfies Charles' law. When T and V are constant, it can be seen from the ideal gas state equation that n and p are proportional.
[0012] According to the preferred technical solution, the mechanism is a negative pressure electrical proportional valve.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The utility model can make the above system into a valve body to form a negative pressure electric proportional valve product, which can output the negative pressure source in any proportion stably through electric control, replace the manual mechanical adjustment method to achieve automatic control, and can be widely used in the field of automatic pneumatic control. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the utility model mechanism;
[0016] In the figure: 1. Control center; 2. Relay; 3. No. 1 on-off stop valve; 4. No. 2 on-off stop valve; 5. Throttle valve; 6. Compressed gas; 7. Air-controlled negative pressure regulating valve; 8. Negative pressure sensor; 9. Negative pressure source. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0019] like Figure 1 As shown, the negative pressure stepless automatic regulating mechanism is characterized in that it includes a control center 1, two relays 2 are connected to the control center 1 and respectively control a No. 1 on-off stop valve 3 and a No. 2 on-off stop valve 4, the No. 1 on-off stop valve 3 and the No. 2 on-off stop valve 4 are respectively connected with throttle valves 5, one of the throttle valves 5 controls the No. 1 on-off stop valve 3 to be connected with compressed gas 6, and the other throttle valve 5 controls the No. 2 on-off stop valve 4 to exhaust, the No. 1 on-off stop valve 3 and the No. 2 on-off stop valve 4 are interconnected and connected with a gas-controlled negative pressure regulating valve 7 in the middle, a negative pressure sensor 8 is connected to the working end of the gas-controlled negative pressure regulating valve 7, and the negative pressure sensor 8 is connected to the control center 1.
[0020] The air-controlled negative pressure regulating valve 7 is also connected to a negative pressure source 9 .
[0021] Control center 1 is a PLC controller.
[0022] The ideal gas at the working end of the air-controlled negative pressure regulating valve 7 satisfies the following ideal gas equation:
[0023] pV=nRT
[0024] Where p is the pressure of the ideal gas; V is the volume of the ideal gas; n is the amount of gas; T is the thermodynamic temperature of the ideal gas; R is the ideal gas constant
[0025] The isochoric process of the ideal gas state equation (V is constant), which satisfies Charles' law. When T and V are constant, it can be seen from the ideal gas state equation that n and p are proportional.
[0026] The mechanism is a negative pressure electrical proportional valve.
[0027] The PLC controller is the continuous control core 1 of the system, and controls the relay 2 to realize the on-off of the two on-off stop valves. Under the throttling of the throttle valve 5, the intake and exhaust flow of the two on-off stop valves can be effectively adjusted, wherein the No. 1 on-off stop valve 3 is for intake from the compressed gas, and the No. 2 on-off stop valve 4 is for exhaust. The switching frequency of the two on-off stop valves can be provided to the pilot port pressure of the air-controlled negative pressure regulating valve 7. At the same time, the negative pressure value of the working end of the air-controlled negative pressure regulating valve 7 is constantly detected by the negative pressure sensor 8, and provided to the PLC controller for feedback adjustment. When the negative pressure value (absolute value) of the negative pressure sensor 8 is lower than the preset value, the PLC controller opens the No. 1 intake on-off stop valve 3 at a certain frequency to increase the negative pressure value. Similarly, when the negative pressure value (absolute value) of the negative pressure sensor 8 is higher than the preset value, the PLC controller opens the No. 2 exhaust on-off stop valve 4 at a certain frequency to reduce the negative pressure value.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. Negative pressure stepless automatic adjustment mechanism, characterized in that: The invention comprises a control center (1), two relays (2) connected to the control center (1) and respectively controlling a No. 1 on-off stop valve (3) and a No. 2 on-off stop valve (4), wherein the No. 1 on-off stop valve (3) and the No. 2 on-off stop valve (4) are respectively connected to throttle valves (5), wherein one throttle valve (5) controls the No. 1 on-off stop valve (3) to be connected to compressed gas (6), and the other throttle valve (5) controls the No. 2 on-off stop valve (4) to exhaust gas, the No. 1 on-off stop valve (3) and the No. 2 on-off stop valve (4) are interconnected and connected to a gas-controlled negative pressure regulating valve (7) in the middle, the working end of the gas-controlled negative pressure regulating valve (7) is connected to a negative pressure sensor (8), and the negative pressure sensor (8) is connected to the control center (1).
2. According to claim 1, the negative pressure stepless automatic adjustment mechanism is characterized in that: The air-controlled negative pressure regulating valve (7) is also connected to a negative pressure source (9).
3. According to claim 2, the negative pressure stepless automatic adjustment mechanism is characterized in that: The control center (1) is a PLC controller.
4. The negative pressure stepless automatic adjustment mechanism according to claim 1, characterized in that: The ideal gas at the working end of the gas-controlled negative pressure regulating valve (7) satisfies the following ideal gas equation: pV=nRT Where p is the pressure of the ideal gas; V is the volume of the ideal gas; n is the amount of gas substance; T is the thermodynamic temperature of the ideal gas; R is the ideal gas constant; The isochoric process of the ideal gas state equation satisfies Charles' law. When T and V are constant, it can be seen from the ideal gas state equation that n and p are proportional.
5. The negative pressure stepless automatic adjustment mechanism according to claim 4, characterized in that: The mechanism is a negative pressure electrical proportional valve.