Chain transmission valve switch capable of switching between remote automation and on-site manual operation

Abstract

The utility model discloses a chain transmission valve switch capable of switching between remote automation and on-site manual operation, which comprises a pipeline valve, a manual actuating mechanism and a remote control system, the top of the pipeline valve is respectively connected with the manual actuating mechanism and the remote control system through a chain wheel mechanism, and the chain wheel mechanism comprises a driven chain wheel, a driving chain wheel and a chain. The driven chain wheel is installed at the original position of the valve hand wheel, a center hole of the driving chain wheel penetrates through the manual executing mechanism to be fixed to the fixing support, and the chain is wound around the driving chain wheel and the driven chain wheel. The remote control system comprises an intelligent controller and an electric actuating mechanism, the intelligent controller is connected between the electric actuating mechanism and the manual actuating mechanism, and an output shaft of the electric actuating mechanism is connected with the driving chain wheel. The problem that an existing pipeline electric valve cannot be remotely operated due to accumulated water is solved. The valve control device is low in manufacturing cost, simple in structure and capable of safely and efficiently controlling the valve.

Description

Technical Field

[0001] The utility model belongs to the field of pipeline valve safety control in restricted environment operations, and specifically relates to a chain-driven valve switch capable of remote automatic and on-site manual switching. Background Art

[0002] Underground pipe networks are complex in most factory designs, and valves need to be opened and closed by climbing down the valve well. Since the valve well is a confined space that is not ventilated or semi-ventilated for a long time, manual operation down the well will not only fail to avoid safety hazards, but also cause high labor intensity, high production costs, and difficulty in effective monitoring and management. If an emergency requires emergency opening and closing of valves, the limitations of manual operation will be fully revealed, and safety and production cannot be taken into account at the same time.

[0003] Most of the existing valves use butterfly valves, which open and close the gate by rotating the valve stem and driving the valve plate to rotate. The disc butterfly plate rotates 90 degrees around the axis to control the pipeline flow. The medium flow can also be controlled by changing the angle of the butterfly plate when the valve is fully open or fully closed. The electric butterfly valve changes the self-locking ability of the valve stem to effectively adjust the flow, and the installation of a turbine reducer can more accurately adjust the medium flow. The use of electric butterfly valves can achieve remote operation, but using it in the valve well to open the manual mode requires manual operation down the well, which not only fails to reduce labor, but also cannot avoid safety hazards in a confined space.

[0004] At present, the pipelines in the underground pipeline network are subjected to pressure in different directions and are corroded and attacked by different chemical substances during use, so the selection of valves and pipelines requires their pressure-bearing capacity and acid and alkali corrosion resistance. However, there are also the following problems: during the rainy season, the accumulated water soaks into the bottom of the pipeline and valve, and the electric valve cannot be used for remote operation; there are many valve wells, and it is difficult to manage them in a refined manner by manual management; ventilation is required for 5 minutes before going down to the well for work, and the valve cannot be opened and closed urgently. Summary of the invention

[0005] In order to overcome the defect that the existing pipeline electric valves cannot be remotely operated due to water accumulation and need to be opened and closed manually in the well, the utility model provides a remote manual-automatic integrated chain transmission valve switch which is low in cost, simple in structure, safe and efficient.

[0006] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0007] A chain drive valve switch with remote automatic and on-site manual switching, comprising a pipeline valve located below in the valve well, a manual actuator located on a fixed bracket above in the valve well, and a remote control system. The top of the pipeline valve is connected to the manual actuator and the remote control system respectively through a sprocket mechanism. The sprocket mechanism includes a driven sprocket, a driving sprocket and a chain. The driven sprocket is installed at the original position of the valve handwheel, the central hole of the driving sprocket passes through the manual actuator and is fixed on the fixed bracket, and the chain is wound around the driving sprocket and the driven sprocket. The remote control system includes an intelligent controller and an electric actuator. The intelligent controller is connected between the electric actuator and the manual actuator. The output shaft of the electric actuator is connected to the driving sprocket, and the power source is provided by the servo motor of the electric actuator to drive the driving sprocket to rotate.

[0008] Further, the intelligent control component includes a digital acquisition end, a professional microcontroller, a human-machine interface control end, a manual control circuit that can freely switch between manual and remote, an electric actuator, and an output signal for controlling the valve and motor torque. One end of the digital acquisition end is electrically connected to the monitoring instrument on the pipeline valve, and the other end of the digital acquisition end is electrically connected to the professional microcontroller. The professional microcontroller is electrically connected to the manual control circuit through the human-machine interface control end, the professional microcontroller is electrically connected to the electric actuator component, the professional controller is also connected to a remote control end, and the professional microcontroller also controls the torque of the motor and the opening of the valve through the output signal. One path of the manual control circuit is connected to the electric actuator component, and the other path of the manual control circuit is connected to the manual actuator.

[0009] Furthermore, the manual actuator includes a rotating wheel for rotating the driving sprocket, and the rotating wheel is connected to the driving shaft of the driving sprocket.

[0010] Furthermore, the electric actuator includes an electronic stroke, an electronic torque, a reducer, a motor and a motor drive module. One end of the electronic stroke and one end of the electronic torque are respectively electrically connected to the professional microcontroller of the electric actuator. The other end of the electronic stroke and the other end of the electronic torque are connected to the motor through the reducer. The output shaft of the motor is connected to the driving sprocket through the motor drive module. The professional microcontroller can adopt a PLC. The input end of the electric drive module is actuated by a 4-20mA current signal output by the PLC according to different opening degrees of the pipeline valve. The PLC gives 4mA corresponding to the fully closed position of the valve and 20mA corresponding to the fully open position of the valve. 4-20mA is used to control different opening degrees of the pipeline valve with different input currents.

[0011] Preferably, the specific steps for the PLC to obtain different openings of the pipeline valve are: the electric actuator is turned on, the pipeline valve is opened, and according to the collected pipeline pressure before the valve and the pipeline pressure after the valve, if the pipeline pressure before the valve rises rapidly and the pipeline pressure after the valve also changes, the valve is closed and an overpressure analysis is performed. After the overpressure analysis, if it is determined that the pipeline is blocked, the electric actuator is closed; if the pipeline is unobstructed, the valve is opened; if the pipeline pressure before the valve and the pipeline pressure after the valve do not change, the opening is continued to increase until the pipeline pressure before the valve and the pipeline pressure after the valve tend to be stable, and the pipeline valve opening reaches the maximum value.

[0012] The collected flow is only for reference, because the flow fluctuates greatly when it is turned on and off, and the regulation is unstable. In order to achieve unattended operation, flow regulation is not set, but flow and pressure regulation can also be added.

[0013] Furthermore, the monitoring instrument includes a pressure sensor and a flow sensor located at both ends of the pipeline valve.

[0014] The utility model can freely switch between automatic and manual through a manual-automatic conversion switch, and control the active sprocket to drive the driven sprocket through a manual actuator and an electric actuator. The driven sprocket controls the opening and closing of the valve by rotating the valve stem, realizing intelligent management combining remote manual and automatic control, and ensuring timely opening and closing of the valve; in the controller conversion part of the electric actuator, the forward and reverse rotation can be manually adjusted, and the manual mode and automatic mode can be switched. The automatic mode adjusts the valve opening according to the change of the coefficient of the central control room; the manual mode can be opened by jogging the rotating sprocket, or the power can be cut off and the sprocket can be driven to open and close by rotating the handle connected to the output shaft; according to the pressure value provided by the pressure sensor, the different openings of the pipeline valve can be accurately controlled, and the valve can be opened and closed in time after the pipeline is blocked, providing an effective means for the refined management of the underground pipeline network; the operation space is changed from underground to above ground, which fully avoids the safety hazards of operations in confined spaces. The utility model has a simple structure and low manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Figure 1 It is the structural diagram of the utility model equipment;

[0017] Figure 2 This is a flow chart of the electric switch controlling the different openings of the valve;

[0018] Figure 3 Circuit schematic diagram that can be controlled both on-site and remotely

[0019] In the figure: It includes pipeline valve 1, driving sprocket 2, driven sprocket 3, chain 4, remote control system 5, electric actuator 6, intelligent controller 7, manual actuator 8, and fixed bracket 9. Specific implementation method

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] As Figure 1 Shown, the chain drive valve switch with remote automatic and on-site manual switching in this embodiment includes pipeline valve 1 located in the lower part of the valve well, manual actuator 8 located on fixed bracket 9 in the upper part of the valve well, and remote control system 5. The top of the pipeline valve 1 is connected to the manual actuator 8 and the remote control system 5 respectively through a sprocket mechanism. The sprocket mechanism includes driven sprocket 3, driving sprocket 2, and chain 4. The driven sprocket 3 is installed at the original position of the valve handwheel, the center hole of the driving sprocket 2 passes through the manual actuator 8 and is fixed on the fixed bracket 9, and the chain 4 is wound around the driving sprocket 2 and the driven sprocket 3; the remote control system 5 includes intelligent controller 7 and electric actuator 6. The intelligent controller 7 is connected between the electric actuator 6 and the manual actuator 8. The output shaft of the electric actuator 6 is connected to the driving sprocket 2. The power source is provided by the servo motor of the electric actuator 5 to drive the driving sprocket 2 to rotate, and the sprockets are regularly tensioned by a special person.

[0022] As Figure 3 Shown, the intelligent control component includes a digital acquisition end, a professional microcontroller, a human-machine interface control end, a manual control circuit that can freely switch between manual and remote, an electric actuator, an output signal for controlling the valve and the motor torque. One end of the digital acquisition end is electrically connected to the monitoring instrument on the pipeline valve, the other end of the digital acquisition end is electrically connected to the professional microcontroller, the professional microcontroller is electrically connected to the manual control circuit through the human-machine interface control end, the professional microcontroller is electrically connected to the electric actuator component, the professional controller is also connected to a remote control end, the professional microcontroller also controls the torque of the motor and the opening of the valve through the output signal, and one path of the manual control circuit is connected to the electric actuator component, and the other path of the manual control circuit is connected to the manual actuator.

[0023] The present invention requires an explosion-proof rating, and selects T6 group for the temperature conditions. To achieve characteristics such as safety and reliability, a PLC is used to control the electric actuator to complete various adjustment instructions.

[0024] Furthermore, the manual actuator 8 includes a rotating wheel for rotating the driving sprocket, and the rotating wheel is connected to the driving shaft of the driving sprocket.

[0025] Furthermore, the electric actuator 6 includes an electronic stroke, an electronic torque, a speed reducer, a motor and a motor drive module. One end of the electronic stroke and one end of the electronic torque are respectively electrically connected to a professional microcontroller for the electric actuator. The other end of the electronic stroke and the other end of the electronic torque are connected to the motor through the speed reducer. The output shaft of the motor is connected to the driving sprocket through the motor drive module. The professional microcontroller uses a PLC. The input end of the motor drive module is actuated by a 4-20 mA current signal output by the PLC according to different opening degrees of the pipeline valve. The PLC gives 4 mA corresponding to the fully closed position of the valve and 20 mA corresponding to the fully open position of the valve. 4-20 mA is used to control different opening degrees of the pipeline valve 1 with different input currents. To control the accuracy and reliability of the opening degree, signal conversion and filtering technologies can be selected during the signal acquisition process to meet the usage requirements.

[0026] As Figure 2 shown, the specific steps for the PLC to obtain different opening degrees of the pipeline valve are as follows: when the electric actuator is opened and the pipeline valve is opened, according to the pipeline pressure before the valve and the pipeline pressure after the valve collected, if the pipeline pressure before the valve rises rapidly and the pipeline pressure after the valve also changes, the valve is closed and overpressure analysis is carried out. After the overpressure analysis, if the pipeline is blocked, the electric actuator is closed; if the pipeline is unblocked, the valve is opened; if neither the pipeline pressure before the valve nor the pipeline pressure after the valve changes, the opening degree is continuously increased until the pipeline pressure before the valve and the pipeline pressure after the valve tend to be stable, then the opening degree of the pipeline valve reaches the maximum value. The electric actuator can adopt an electric switch.

[0027] Collecting the flow rate is only for reference because the flow rate fluctuates greatly during switching and is unstable to regulate. To achieve unattended operation, no flow regulation is set, but flow and pressure regulation forms can also be added.

[0028] Further, the monitoring instrument includes pressure sensors and flow sensors located at both ends of the pipeline valve.

[0029] Preferably, the above-mentioned electronic components all adopt existing general models.

[0030] The sprocket mechanism includes a manual actuator 8, a driving sprocket 2, a driven sprocket 3, a chain 4, and a sprocket fixing bracket 9. The sprocket and the chain 4 are selected according to the valve size and the medium pressure. The center hole of the driving sprocket 2 passes through the manual actuator 8 and is fixed on the fixing bracket 9. The driven sprocket 3 is installed at the original position of the valve disc. The chain is wound around the driving and driven sprockets 2, and the sprockets are regularly tensioned by a special person. Manual control can adjust the intelligent controller to switch to the on-site mode. By rotating the manual actuator 8, the driving sprocket 2 is driven to rotate, and then the chain 4 is driven to rotate. The driven sprocket 3 rotates clockwise and counterclockwise along with the chain to achieve the effect of opening and closing the valve. During use, the driving sprocket 2 and the driven sprocket 3 of the same specification and model are selected, and the valve opening is easy to control in the manual mode.

[0031] The remote control system 5 includes an intelligent controller 7 and an electric actuator 6. The remote control system 5 collects and processes relevant signals such as the existing pipeline pressure and flowmeter in the pipeline, simulates the manual switch program for processing, and realizes the remote control switch function relying on the signal transmission system. The intelligent controller 7 is required to reach the explosion-proof grade and is selected for the temperature condition of group T6. To achieve the characteristics of safety and reliability, a PLC is used to control the electric actuator to complete various adjustment instructions.

[0032] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A chain-driven valve switch with remote automatic and on-site manual switching, characterized in that: It includes a pipeline valve located at the lower part of the valve well, a manual actuator and a remote control system located on a fixed bracket at the upper part of the valve well. The top of the pipeline valve is respectively connected to the manual actuator and the remote control system through a sprocket mechanism. The sprocket mechanism includes a driven sprocket, a driving sprocket and a chain. The driven sprocket is installed at the original position of the valve handwheel. The center hole of the driving sprocket passes through the manual actuator and is fixed on the fixed bracket. The chain is wound around the driving sprocket and the driven sprocket. The remote control system includes an intelligent control component and an electric actuator. The intelligent control component is connected between the electric actuator and the manual actuator. The output shaft of the electric actuator is connected to the driving sprocket. The power source is provided by the servo motor of the electric actuator to drive the driving sprocket to rotate.

2. The chain-driven valve switch for remote automatic and on-site manual switching according to claim 1 is characterized in that: The intelligent control component includes a digital acquisition end, a professional microcontroller, a human-machine interface control end, a hand-controlled circuit that can freely switch between manual and remote control, an electric actuator, and an output signal for controlling the valve and motor torque. One end of the digital acquisition end is electrically connected to the monitoring instrument on the pipeline valve, and the other end of the digital acquisition end is electrically connected to the professional microcontroller. The professional microcontroller is electrically connected to the manual control circuit through the human-machine interface control end, and the professional microcontroller is electrically connected to the electric actuator component. The professional controller is also connected to the remote control end. The professional microcontroller also controls the torque of the motor and the opening of the valve through the output signal. One path of the manual control circuit is connected to the electric actuator component, and the other path of the manual control circuit is connected to the manual actuator.

3. The chain-driven valve switch for remote automatic and on-site manual switching according to claim 2 is characterized in that: The manual actuator comprises a rotating wheel for rotating the driving sprocket, and the rotating wheel is connected to the driving shaft of the driving sprocket.

4. The chain-driven valve switch for remote automatic and on-site manual switching according to claim 2 is characterized in that: The electric actuator includes an electronic stroke, an electronic torque, a reducer, a motor and a motor drive module. One end of the electronic stroke and one end of the electronic torque are respectively electrically connected to the electric actuator with a professional microcontroller, and the other end of the electronic stroke and the other end of the electronic torque are connected to the motor through the reducer. The output shaft of the motor is connected to the driving sprocket through the motor drive module.

5. The chain-driven valve switch for remote automatic and on-site manual switching according to claim 2 is characterized in that: The monitoring instrument includes a pressure sensor and a flow sensor located at both ends of the pipeline valve.

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