A sealing gas balance and leak detection device for a rotary pressure filter isolation unit

Abstract

The utility model relates to rotary pressure filter technology field especially a kind of sealing gas balance and leak detection device of rotary pressure filter isolation unit, including sealing gas balance control component and leak detection component, sealing gas balance control component is linked and adjusted by the self-control valve of total pipe line and the linkage of always open hand valve, realizes the dynamic stabilization of sealing gas system pressure;Leak detection component can accurately position the isolation unit of leakage by setting branch pipe hand valve on the sealing gas branch pipe of each isolation unit, to distinguish internal leakage and external leakage quickly.The utility model improves sealing gas pressure stability, simplifies leak detection process, reduces equipment maintenance cost, and is applicable to the sealing control and detection of the isolation unit of various rotary pressure filters.

Description

Technical Field

[0001] This utility model relates to the field of rotary pressure filter technology, and in particular to a sealing gas balance and leak detection device for the isolation unit of a rotary pressure filter. Background Technology

[0002] Rotary pressure filters, as continuous filtration equipment, are widely used in chemical, food, and environmental protection industries. The sealing performance of their core component, the isolation unit, directly determines the filtration efficiency and equipment stability. Currently, the isolation unit typically uses sealing gas for dynamic sealing, but this sealing gas system has the following problems:

[0003] Leak detection is difficult because the existing equipment does not have independent control components for the sealing gas branches of each isolation unit. When a sealing gas leak occurs, the cover plates of each isolation unit must be inspected one by one. If there is no obvious leak point, the equipment needs to be shut down and the diaphragm gradually opened to check whether the sealing gas has leaked internally due to diaphragm damage. The leak point cannot be located quickly, and the repair time can take several hours or even a day, which seriously affects the continuity of production.

[0004] Pressure regulation is lagging, and the internal operating pressure of the equipment fluctuates with changes in operating conditions. The pressure regulation of the existing sealing gas system relies on manual operation and cannot respond to pressure changes in real time. When the pressure difference between the sealing gas pressure and the internal pressure deviates from the set pressure difference, it can easily lead to a shortened life of the isolation unit. In severe cases, it can damage the transmission system such as the motor and reducer, causing malfunctions. Utility Model Content

[0005] To address the aforementioned technical deficiencies, this invention provides a sealing gas balancing and leak detection device for the isolation unit of a rotary pressure filter, which enables rapid leak detection and automatic balancing of sealing gas pressure.

[0006] This utility model discloses a sealing gas balance and leak detection device for the isolation unit of a rotary pressure filter, including a control unit, a sealing gas balance control component and a leak detection component;

[0007] The sealing gas balance control component includes a gas source interface, a self-control valve, a remote pressure gauge, a normally open manual valve, and a main pipeline. One end of the main pipeline is the gas source interface for connecting to an external compressed gas source. A normally open manual valve is provided at the other end of the main pipeline. A self-control valve is provided on the main pipeline near the gas source interface. A remote pressure gauge is provided on the main pipeline between the self-control valve and the normally open manual valve.

[0008] The remote pressure gauge and the automatic control valve are both electrically connected to the control unit.

[0009] The leak detection assembly includes a sealing gas branch pipe and a branch pipe manual valve. A sealing gas branch pipe is connected to the sealing gas inlet of each isolation unit. All sealing gas branch pipes are connected to the main pipeline, and a branch pipe manual valve is installed on the sealing gas branch pipe.

[0010] It also includes an alarm unit, which is connected to the control unit. When the pressure in the main pipeline detected by the remote pressure gauge exceeds a preset threshold, the control unit controls the alarm unit to issue a warning signal.

[0011] All the sealed gas branch pipes converge and are connected to the main pipeline via a pipe, with the connection point between the pipe and the main pipeline located at the connection point between the remote pressure gauge and the main pipeline.

[0012] The sealing gas balancing and leak detection device for the isolation unit of a rotary pressure filter obtained by this invention has the following beneficial effects:

[0013] The sealing gas balance control component achieves dynamic pressure balance of the system through the linkage adjustment of the self-control valve and the normally open manual valve. The pressure is stable and highly accurate, avoiding sealing failure or energy waste caused by pressure fluctuations.

[0014] The leak detection component can accurately locate the leak isolation unit through independent control of the branch pipe manual valve. Combined with the observation of leak characteristics, it can quickly distinguish between internal and external leaks without stopping the machine for disassembly, which greatly improves the leak detection efficiency.

[0015] The device has a simple structure, is easy to operate, and is compatible with rotary pressure filters of different specifications, making it highly practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Example 1:

[0019] like Figure 1 As shown, this utility model discloses a sealing gas balance and leak detection device for the isolation unit of a rotary pressure filter, including a control unit 4, a sealing gas balance control component 1, and a leak detection component 2.

[0020] The sealing gas balance control component 1 includes a gas source interface 11, a self-control valve 12, a remote pressure gauge 13, a normally open manual valve 14, and a main pipeline 15. One end of the main pipeline 15 is the gas source interface 11, which is used to connect to an external compressed gas source. A normally open manual valve 14 is provided at the other end of the main pipeline 15. A self-control valve 12 is provided on the main pipeline 15 near the gas source interface 11. A remote pressure gauge 13 is provided on the main pipeline 15 between the self-control valve 12 and the normally open manual valve 14.

[0021] The remote pressure gauge 13 and the automatic control valve 12 are both electrically connected to the control unit 4.

[0022] The leak detection assembly 2 includes a sealing gas branch pipe 21 and a branch pipe manual valve 22. A sealing gas branch pipe 21 is connected to the sealing gas inlet of each isolation unit 3. The sealing gas branch pipes 21 are all connected to the main pipeline 15. A branch pipe manual valve 22 is provided on the sealing gas branch pipe 21.

[0023] The sealing gas balance control component 1 is used to maintain the pressure stability of the main pipeline 15, and the leak detection component 2 is used to locate the leak location and distinguish the leak type.

[0024] The self-control valve 12 is automatically adjusted by the control unit 4 according to the pressure value transmitted to the control unit 4 by the remote pressure gauge 13, and the normally open hand valve 14 is used for venting the main pipeline 15.

[0025] The control unit 4 has internal pressure threshold parameters, which can control the opening and closing of the self-control valve 12 and its opening degree according to the feedback signal from the remote pressure gauge 13.

[0026] The control unit 4 can be equipped with a human-machine interface module, i.e. a display screen, to display real-time pressure values, set pressure parameters, and record pressure fluctuation curves.

[0027] In practical use, the control unit 4 can obtain the internal operating pressure P1 of the equipment in real time. The pressure value P2 in the main pipeline 15 is detected by the remote pressure gauge 13. The control unit 4 sets the pressure difference and calculates the target pressure value P = P1 + pressure difference. When P2 < P, the control unit 4 controls the automatic control valve 12 to increase the opening to replenish air; when P2 > P, the control unit 4 controls the automatic control valve 12 to decrease the opening, and at the same time, natural venting occurs through the normally open hand valve 14; when P2 = P, the automatic control valve 12 maintains the current opening, so that the replenishment air volume and the venting air volume remain balanced. Through the above regulation, when the pressure in the main pipeline 15 deviates from the target pressure, the value P2 can be quickly and accurately automatically adjusted to P.

[0028] The automatic control valve 12 can be a proportional control valve with an opening adjustment range of 0-100% and a response time of ≤1s.

[0029] The remote pressure gauge 13 has a detection accuracy of not less than ±0.01MPa and has a data transmission function, which can transmit the pressure signal to the control unit 4.

[0030] The normally open hand valve 14 is a manually adjustable hand valve whose exhaust volume can be adjusted by the valve opening degree, and the maximum exhaust volume matches the maximum air replenishment volume of the self-control valve 12. The normally open hand valve 14 can be a ball valve, a gate valve, or other types of valve.

[0031] It also includes an alarm unit 5, which is connected to the control unit 4. When the remote pressure gauge 13 detects that the pressure of the main pipeline 15 exceeds a preset threshold, the control unit 4 controls the alarm unit 5 to issue a warning signal.

[0032] All the sealing gas branch pipes 21 converge and are connected to the main pipe 15 via a pipeline, with the connection point between the pipeline and the main pipe 15 located at the connection point between the remote pressure gauge 13 and the main pipe 15. Since all the sealing gas branch pipes 21 are connected to the main pipe 15 at the remote pressure gauge 13, the pressure value detected by the remote pressure gauge 13 is essentially consistent with the pressure value inside the sealing gas branch pipe 21.

[0033] Actual running example:

[0034] The control unit 4 is connected to the remote pressure gauge 13, the automatic control valve 12, and the alarm unit 5, respectively, with a preset system pressure target value of 0.4 MPa. When the remote pressure gauge 13 detects that the pressure in the main pipeline 15 rises to 0.45 MPa, the control unit 4 sends a signal to close the automatic control valve 12 to 30% of its opening, while the normally open hand valve 14 remains at 50% of its opening to release air, until the pressure drops to 0.4 MPa. When the pressure drops to 0.35 MPa, the automatic control valve 12 opens to 80% of its opening to replenish air, and the air release volume of the normally open hand valve 14 is less than the air replenishment volume, causing the pressure to rise back to 0.4 MPa and stabilize.

[0035] During leak detection, first raise the sealing gas pressure of isolation unit 3 to a specific pressure of 0.6 MPa, then close the corresponding branch manual valve 22, normally open manual valve 14, and automatic control valve 12, except for the isolation unit 3 to be tested, while keeping the manual valve of the sealing gas branch pipe 21 of the isolation unit 3 to be tested open. If the pressure of the sealing gas main pipe 15 remains stable at 0.6 MPa, then the isolation unit 3 has no leakage. If the pressure of the sealing gas main pipe 15 continues to drop, then the isolation unit 3 is judged to have a leak. Check whether there is any external leakage around the isolation unit 3. If there is no visible external leakage, then the internal diaphragm of the equipment is judged to be damaged. Repeat the above operation to quickly check the sealing gas leakage of isolation unit 3.

[0036] This device achieves automatic balance control of sealing gas pressure, and can quickly locate leak points and distinguish leak types, effectively ensuring the stable operation of the rotary pressure filter.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A sealing gas balance and leak detection device for the isolation unit of a rotary pressure filter, characterized in that: Includes a control unit, a sealing gas balance control component, and a leak detection component; The sealing gas balance control component includes a gas source interface, a self-control valve, a remote pressure gauge, a normally open manual valve, and a main pipeline. One end of the main pipeline is the gas source interface for connecting to an external compressed gas source. A normally open manual valve is provided at the other end of the main pipeline. A self-control valve is provided on the main pipeline near the gas source interface. A remote pressure gauge is provided on the main pipeline between the self-control valve and the normally open manual valve. The remote pressure gauge and the automatic control valve are both electrically connected to the control unit. The leak detection assembly includes a sealing gas branch pipe and a branch pipe manual valve. A sealing gas branch pipe is connected to the sealing gas inlet of each isolation unit. All sealing gas branch pipes are connected to the main pipeline, and a branch pipe manual valve is installed on the sealing gas branch pipe.

2. The sealing gas balance and leak detection device for the isolation unit of a rotary pressure filter according to claim 1, characterized in that: It also includes an alarm unit, which is connected to the control unit. When the pressure in the main pipeline detected by the remote pressure gauge exceeds a preset threshold, the control unit controls the alarm unit to issue a warning signal.

3. The sealing gas balance and leak detection device for the isolation unit of a rotary pressure filter according to claim 1, characterized in that: All sealed gas branch pipes converge and are connected to the main pipeline via a conduit, with the connection point between the conduit and the main pipeline located at the connection point between the remote pressure gauge and the main pipeline.

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