Pipeline automatic internal drive pressure regulating system with emergency self-locking function
By designing an automatic internal drive and pressure regulating system of pipelines with emergency self-locking function, the self-forced pressure regulating valve and solenoid shutdown valve can be used to achieve rapid closing of the valve in the case of emergency power outage, solving the problem that existing valves cannot be closed quickly during emergency power outage, and achieving safe and reliable medium flow control.
Patent Information
- Application Number
- CN202421605375.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-09
AI Technical Summary
Existing industrial valves cannot be closed quickly in case of emergency power outages, which poses safety risks, and the use of air-source-driven valves is limited due to installation site restrictions.
An automatic internal driving and pressure regulating system for pipelines with emergency self-locking functions is designed. The system includes No. 1 manual gate valve, No. 1 solenoid shutoff valve, No. 2 manual gate valve, No. 3 manual gate valve, No. 2 solenoid shutoff valve and self-force pressure regulating valve. In the case of emergency power outage, the No. 2 solenoid shutdown valve is opened to release the pressure in the pipeline, so that the self-forced pressure regulating valve is completely closed, achieving rapid closing of the valve.
In the case of emergency power outage, the system can quickly close the valve, cut off the flow of media, avoid safety accidents and equipment damage, and at the same time, no external driving source is required, and the pressure regulation is achieved using the energy of the media to be adjusted, which has the characteristics of energy saving, sensitive movement, and accurate control.
Smart Images
Figure CN222760725U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of valve control, and in particular relates to a pipeline automatic internal drive pressure regulating system with an emergency self-locking function. Background Art
[0002] Valves are important actuators of pipeline pressure regulating systems. Most existing industrial valves are driven by power or gas sources. In the event of an emergency power outage, power-driven valves cannot be closed quickly, which not only poses a safety hazard, but also easily causes damage to equipment. Although gas-driven valves are not affected by the power on and off, and can be opened and closed at will in the event of an emergency power outage, gas sources require installation sites. Many industrial sites are not easy to install and use due to site conditions, so the use of gas-driven valves is limited.
[0003] In view of this, the utility model provides a pipeline automatic internal drive pressure regulating system with an emergency self-locking function, in which the valve of the system can be quickly closed to cut off the flow of the medium in the event of an emergency power outage. Utility Model Content
[0004] In view of the deficiencies in the prior art, the technical problem that the utility model intends to solve is to provide a pipeline automatic internal drive pressure regulating system with an emergency self-locking function.
[0005] The utility model solves the technical problem by adopting the following technical solutions:
[0006] A pipeline automatic internal drive pressure regulating system with emergency self-locking function, characterized in that the system comprises a No. 1 manual gate valve, a No. 1 electromagnetic shut-off valve, a throttle valve, a No. 2 manual gate valve, a No. 3 manual gate valve, a No. 2 electromagnetic shut-off valve and a self-operated pressure regulating valve;
[0007] The inlet of the self-operated pressure regulating valve is connected to the upstream pressure pipeline, and the outlet is connected to the downstream pressure pipeline; the upstream pressure pipeline is also connected to a pressure taking pipe, the other end of the pressure taking pipe is connected to the membrane chamber of the self-operated pressure regulating valve, and two parallel branches are arranged on the pressure taking pipe, one branch is provided with a No. 1 manual gate valve, a No. 1 electromagnetic shut-off valve, a throttle valve and a No. 2 manual gate valve in sequence, and the other branch is provided with a No. 3 manual gate valve; a branch is led out between the throttle valve and the No. 2 manual gate valve, and the No. 2 electromagnetic shut-off valve is arranged on the branch, and the No. 2 electromagnetic shut-off valve is connected to the external atmosphere at the same time; when the power is on, the No. 1 electromagnetic shut-off valve is opened and the No. 2 electromagnetic shut-off valve is closed; when the power is off in an emergency, the No. 1 electromagnetic shut-off valve is closed and the No. 2 electromagnetic shut-off valve is opened.
[0008] Furthermore, when the temperature of the gas medium in the pipeline is higher than 70°C and lower than 140°C or the temperature of the liquid medium is higher than 140°C, the self-operated pressure regulating valve is installed in an inverted manner, and a condensation tank is installed near the pressure taking point of the pressure taking pipe, and the pressure taking pipe, the condensation tank and the membrane chamber of the self-operated pressure regulating valve are filled with refrigerant.
[0009] Furthermore, the installation position of the condensation tank is higher than the membrane chamber of the self-operated pressure regulating valve and lower than the position of the connecting pipe in front of the valve.
[0010] Furthermore, the distance from the connection position between the pressure-taking pipe and the upstream pressure pipeline to the self-operated pressure regulating valve should be greater than 2D, where D is the diameter of the upstream pressure pipeline.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] 1. When an emergency power failure occurs, the system immediately closes the No. 1 electromagnetic shut-off valve and opens the No. 2 electromagnetic shut-off valve to release the pressure in the pipeline, so that the opening of the self-operated pressure regulating valve continues to decrease until the self-operated pressure regulating valve is completely closed, achieving rapid closure of the valve to avoid safety accidents and damage to the equipment. This system solves the problem that power-driven valves cannot be quickly closed due to emergency power failures and that gas-driven valves are limited by the gas source installation site.
[0013] 2. The system does not require an external drive source or external control signals. It uses the energy of the medium being regulated as a power source, controls the position of the valve core through the actuator of the self-operated pressure regulating valve, and then changes the pressure difference and flow at both ends of the self-operated pressure regulating valve, and automatically adjusts the opening of the self-operated pressure regulating valve according to the pressure setting value to achieve the purpose of pressure regulation. The pressure setting value can be continuously set through the pressure regulating disk during operation, the pressure segment range is fine and can be crossed with each other, and the adjustment accuracy is high. The system has the characteristics of energy saving, sensitive action, precise control, reliable operation, and convenient operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a structural schematic diagram of the self-operated pressure regulating valve of the utility model;
[0016] In the figure, 1, manual gate valve No. 1; 2, solenoid shut-off valve No. 1; 3, throttle valve; 4, manual gate valve No. 2; 5, manual gate valve No. 3; 6, solenoid shut-off valve No. 2; 7, self-operated pressure regulating valve; 8, condensate tank; 9, upstream pressure pipeline; 10, downstream pressure pipeline; 11, pressure taking pipe; 701, membrane chamber; 702, spring; 703, valve body; 704, pressure regulating disk. DETAILED DESCRIPTION
[0017] Specific embodiments are given below in conjunction with the accompanying drawings. The specific embodiments are only used to further illustrate the technical solution of the utility model in detail and do not limit the protection scope of the present application.
[0018] The utility model is a pipeline automatic internal drive pressure regulating system with emergency self-locking function (referred to as system, see Figures 1-2 ), including a No. 1 manual gate valve 1, a No. 1 electromagnetic shut-off valve 2, a throttle valve 3, a No. 2 manual gate valve 4, a No. 3 manual gate valve 5, a No. 2 electromagnetic shut-off valve 6 and a self-operated pressure regulating valve 7;
[0019] The inlet of the self-operated pressure regulating valve 7 is connected to the upstream pressure pipeline 9, and the outlet is connected to the downstream pressure pipeline 10; one end of the pressure-taking pipe 11 is connected to the upstream pressure pipeline 9, and the other end of the pressure-taking pipe 11 is connected to the membrane chamber 701 of the actuator of the self-operated pressure regulating valve 7. Two parallel branches are arranged on the pressure-taking pipe 11. A manual gate valve No. 1, a solenoid shut-off valve No. 2, a throttle valve 3 and a manual gate valve No. 2 4 are arranged in sequence on one branch. The manual gate valve No. 1 and the manual gate valve No. 2 are convenient for their For the maintenance of other valves, the throttle valve 3 allows the medium to slowly enter the membrane chamber 701 of the actuator of the self-operated pressure regulating valve 7, so as to achieve the purpose of slowly opening and quickly closing the self-operated pressure regulating valve 7, thereby avoiding damage to the equipment; a No. 3 manual gate valve 5 is provided on another branch, which is convenient for the maintenance of another parallel branch; a branch is led out between the throttle valve 3 and the No. 2 manual gate valve 4, on which a No. 2 electromagnetic shut-off valve 6 is provided, which is also connected to the external atmosphere. When powered on, the No. 1 electromagnetic shut-off valve 2 is in the open state, and the No. 2 electromagnetic shut-off valve 6 is in the closed state, and the opening of the self-operated pressure regulating valve 7 is automatically adjusted according to the pressure before the valve, so that the pressure before the valve reaches the set value; in the case of emergency power failure, the No. 1 electromagnetic shut-off valve 2 is immediately closed, and the No. 2 electromagnetic shut-off valve 6 is immediately opened, and the opening of the self-operated pressure regulating valve 7 is gradually reduced until it is completely closed, so as to achieve the purpose of self-locking.
[0020] In principle, the installation method of the self-operated pressure regulating valve 7 is to install the ordinary gas medium upright (i.e. the actuator is on the top and the valve body 703 is on the bottom), and the liquid and steam medium are inverted. However, when the temperature of the gas medium is higher than 70℃ and lower than 140℃ or the temperature of the liquid medium is higher than 140℃, the self-operated pressure regulating valve 7 should be installed inverted, and a condenser 8 should be installed near the pressure point on the pressure taking pipe 11, and the pressure taking pipe 11, the condenser 8 and the diaphragm chamber 701 of the actuator of the self-operated pressure regulating valve 7 should be filled with refrigerant to ensure that steam cannot enter the diaphragm chamber 701 of the self-operated pressure regulating valve 7 to prevent the diaphragm from being aged by high temperature. When the temperature of the gas medium is higher than 70℃ and lower than 140℃, if the self-operated pressure regulating valve 7 is still installed upright, the self-operated pressure regulating valve 7 should use a high-temperature diaphragm (such as EPDM diaphragm, silicone rubber diaphragm, etc.), otherwise it will cause the aging of the ordinary diaphragm. The installation position of the condensation tank 8 must be higher than the membrane chamber 701 of the actuator of the self-operated pressure regulating valve 7 and lower than the connection position before the valve, that is, the connection position between the pressure taking pipe 11 and the self-operated pressure regulating valve 7, to ensure that the condensation tank 8 is filled with refrigerant.
[0021] A certain straight pipe section should be maintained before and after the self-operated pressure regulating valve 7 as much as possible, and the length is generally 6D, where D is the pipe diameter. The pressure point of the pressure taking pipe 11 (i.e., the connection position between the pressure taking pipe 11 and the upstream pressure pipeline 9) should be located at an appropriate position before the self-operated pressure regulating valve 7, and the distance from the self-operated pressure regulating valve 7 should be greater than 2D, and should not be too far or too close. Pressure gauges are set before and after the self-operated pressure regulating valve 7. The pressure gauge before the valve should be set upstream of the pressure taking point and close to the pressure taking point, so that the pressure setting value is consistent with the actual pressure value. The pressure setting value of the self-operated pressure regulating valve 7 can be adjusted through the pressure regulating disk 704.
[0022] The working principle and workflow of the utility model are:
[0023] When the power is on, the No. 1 electromagnetic shut-off valve 2 is in the open state, and the No. 2 electromagnetic shut-off valve 6 is in the closed state. One way of the medium flows from the upstream pressure pipeline 9 into the valve body 703 of the self-operated pressure regulating valve 7, and is output to the downstream pressure pipeline 10 after being throttled by the valve seat and valve core of the self-operated pressure regulating valve 7. The other way of the medium flows through the No. 1 manual gate valve 1, the No. 1 electromagnetic shut-off valve 2, the throttle valve 3 and the No. 2 manual gate valve 4 on the pressure taking pipe 11, and then enters the diaphragm chamber 701 of the actuator of the self-operated pressure regulating valve 7 and acts on the diaphragm, generating a driving force according to the principle of mechanics, which is balanced with the reaction force of the spring of the self-operated pressure regulating valve 7, so that the valve core in the valve body 703 moves the corresponding displacement accordingly, so as to achieve the purpose of regulating the pressure before the valve. If the pressure before the valve of the self-operated pressure regulating valve 7 is higher than the pressure setting value, the force acting on the diaphragm increases, the spring is compressed, and the valve core is driven to move slightly, so that the valve opening increases, and then the pressure before the valve decreases until it reaches the pressure setting value. Similarly, if the pressure before the valve is lower than the pressure setting value, the spring reaction force drives the valve core to move slightly, reducing the valve opening, and then increasing the pressure before the valve until it reaches the pressure setting value. Generally speaking, when the self-operated pressure regulating valve 7 works normally, the pressure before the valve is greater than the pressure setting value, and the valve is in a fully open state; when the pressure before the valve is lower than the pressure setting value, the valve opening will gradually decrease until the pressure before the valve rises to the pressure setting value or even completely closes.
[0024] In the event of an emergency power outage, the No. 1 electromagnetic shut-off valve 2 is immediately closed, and the No. 2 electromagnetic shut-off valve 6 is immediately opened. The pressure in the diaphragm chamber 701 of the self-operated pressure regulating valve 7 will be released immediately, causing the force acting on the diaphragm to continue to decrease. Due to the reaction force of the spring, the valve core is driven to move slightly, causing the valve opening to continue to decrease until the self-operated pressure regulating valve 7 is completely closed, cutting off the flow of the medium.
[0025] During normal use, the No. 3 manual gate valve 5 is in a closed state. When only the branch where the No. 1 electromagnetic shut-off valve 2 is located needs to be repaired, the No. 3 manual gate valve 5 is temporarily opened to ensure the normal flow of the medium in the pipeline.
[0026] Any matters not described in the present invention are applicable to the prior art.
Claims
1. A pipeline automatic internal drive pressure regulating system with emergency self-locking function, characterized in that: The system includes a No. 1 manual gate valve, a No. 1 electromagnetic shut-off valve, a throttle valve, a No. 2 manual gate valve, a No. 3 manual gate valve, a No. 2 electromagnetic shut-off valve and a self-operated pressure regulating valve; The inlet of the self-operated pressure regulating valve is connected to the upstream pressure pipeline, and the outlet is connected to the downstream pressure pipeline; the upstream pressure pipeline is also connected to a pressure taking pipe, the other end of the pressure taking pipe is connected to the membrane chamber of the self-operated pressure regulating valve, and two parallel branches are arranged on the pressure taking pipe, one branch is provided with a No. 1 manual gate valve, a No. 1 electromagnetic shut-off valve, a throttle valve and a No. 2 manual gate valve in sequence, and the other branch is provided with a No. 3 manual gate valve; a branch is led out between the throttle valve and the No. 2 manual gate valve, and the No. 2 electromagnetic shut-off valve is arranged on the branch, and the No. 2 electromagnetic shut-off valve is connected to the external atmosphere at the same time; when the power is on, the No. 1 electromagnetic shut-off valve is opened and the No. 2 electromagnetic shut-off valve is closed; when the power is off in an emergency, the No. 1 electromagnetic shut-off valve is closed and the No. 2 electromagnetic shut-off valve is opened.
2. The pipeline automatic internal drive pressure regulating system with emergency self-locking function according to claim 1 is characterized in that: When the temperature of the gas medium in the pipeline is higher than 70℃ and lower than 140℃ or the temperature of the liquid medium is higher than 140℃, the self-operated pressure regulating valve is installed in an inverted manner, a condensing tank is installed near the pressure taking point of the pressure taking pipe, and the pressure taking pipe, condensing tank and membrane chamber of the self-operated pressure regulating valve are filled with refrigerant.
3. The pipeline automatic internal drive pressure regulating system with emergency self-locking function according to claim 2 is characterized in that: The installation position of the condensation tank is higher than the membrane chamber of the self-operated pressure regulating valve and lower than the position of the connecting pipe in front of the valve.
4. The pipeline automatic internal drive pressure regulating system with emergency self-locking function according to any one of claims 1 to 3, characterized in that: The distance from the connection position of the pressure taking pipe and the upstream pressure pipeline to the self-operated pressure regulating valve should be greater than 2D, where D is the diameter of the upstream pressure pipeline.