Automatic liquid discharging device of special condenser for air-cooled roots pump of power plant

Abstract

The utility model relates to the technical field of special condensers for air-cooled roots pumps, and discloses an automatic liquid discharge device for a special condenser for an air-cooled roots pump of a power plant, which comprises an automatic liquid discharge tank, a breather pipe and an emptying electromagnetic valve on the left side, and a condenser shell pass upper communicating pipe and a normally open electromagnetic valve on the top, and a liquid discharge pipe and a one-way valve II are arranged at the bottom of the condenser shell pass lower communicating pipe. The emptying electromagnetic valve and the normally-open electromagnetic valve are intelligently controlled through the controller, automatic adjustment can be carried out through the time relay according to the set time, it is ensured that accumulated liquid is discharged in time, and meanwhile tedious and unsafe factors of manual operation are avoided. The controller can monitor the working state of the condenser in real time and automatically start the liquid discharging program when the preset condition is met, the problem that accumulated liquid of the condenser cannot be automatically discharged in the prior art is effectively solved, and the automation level and the operation efficiency of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of special condensers for air-cooled Roots pumps, in particular to an automatic liquid draining device for special condensers for air-cooled Roots pumps in power plants. Background Art

[0002] The air-cooled Roots vacuum pump, a twin-rotor positive displacement vacuum pump, features a pair of symmetrical three-lobed plum-shaped rotors within the pump chamber. These rotors are driven by a pair of gears, achieving synchronous, high-speed rotation in opposite directions, thereby continuously transferring gas from the inlet to the exhaust. During this transfer, the gas is first condensed in the Roots pump's dedicated interstage condenser. After condensation, most of the uncondensed gas flows into the forewater ring pump, while the remaining small amount of gas is cooled by a heat exchanger and returned to the pump chamber, cooling both the rotors and the pump chamber.

[0003] During the pumping process in a power plant's condenser, the gas processed is primarily saturated steam. This steam is mostly condensed into liquid as it passes through the interstage condenser, forming a sludge buildup. It's worth noting that during normal operation, the interstage condenser is under negative pressure, maintaining the same vacuum level as the forestage water ring vacuum pump. Consequently, condensed water within the condenser shell cannot be automatically discharged.

[0004] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop an automatic liquid draining device for a condenser specially used for an air-cooled Roots pump in a power plant. Utility Model Content

[0005] The utility model aims to provide an automatic liquid draining device for a condenser specially used for an air-cooled Roots pump in a power plant, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A technical solution for an automatic drain device for a condenser specially used for an air-cooled Roots pump in a power plant, comprising an automatic drain tank, a vent pipe being provided on the left side of the automatic drain tank, and a vent solenoid valve being installed on the vent pipe, a condenser shell-side upper connecting pipe being provided on the top of the automatic drain tank, a normally open solenoid valve being installed on the condenser shell-side upper connecting pipe, a condenser shell-side lower connecting pipe being provided on an adjacent side, a one-way valve 1 being installed on the condenser shell-side lower connecting pipe, a drain pipe being provided at the bottom of the automatic drain tank, and a one-way valve 2 being provided on the drain pipe.

[0008] As an optimal technical solution, a ventilation manual valve is also installed on the ventilation pipe, an upper manual valve is installed on the upper connecting pipe of the condenser shell side, a lower manual valve is installed on the lower connecting pipe of the condenser shell side, and a discharge manual valve is installed on the drain pipe.

[0009] As a preferred technical solution, the vent solenoid valve and the normally open solenoid valve are commonly connected to a controller.

[0010] As a preferred technical solution, the automatic drain tank is installed on the interstage condenser.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] (1) The utility model is an automatic liquid draining device for condensers used in power plant air-cooled Roots pumps. The vent solenoid valve and the normally open solenoid valve are intelligently controlled by a controller and can be automatically adjusted at a specified time by a time relay to ensure timely discharge of accumulated liquid while avoiding the tedious and unsafe factors of manual operation. The controller can monitor the working status of the condenser in real time and automatically start the liquid draining program when the preset conditions are met, effectively solving the problem of the inability to automatically drain the accumulated liquid in the condenser in the prior art and improving the automation level and operating efficiency of the equipment.

[0013] (2) The present invention is an automatic liquid drain device for condensers used in power plant air-cooled Roots pumps. The device is equipped with manual valves as backup, including a ventilation manual valve, an upper manual valve, a lower manual valve, and a discharge manual valve. In the event of a malfunction in the automatic control system or manual intervention is required, the operator can use the manual valves to control the flow of air and the discharge of accumulated liquid, thereby ensuring continuous and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an automatic drain device for a condenser used in air-cooled Roots pumps in power plants.

[0015] In the accompanying drawings: 1. Automatic drain tank; 2. Vent pipe; 21. Vent manual valve; 22. Vent solenoid valve; 3. Upper connecting pipe of condenser shell side; 31. Upper manual valve; 32. Normally open solenoid valve; 4. Lower connecting pipe of condenser shell side; 41. One-way valve 1; 42. Lower manual valve; 5. Drain pipe; 51. One-way valve 2; 52. Discharge manual valve; 6. Controller. DETAILED DESCRIPTION

[0016] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0017] like Figure 1 As shown, the present invention provides a technical solution for an automatic condenser drain device for air-cooled Roots pumps in power plants. The device includes an automatic drain tank 1, the core component of the entire device. To ensure smooth drainage of accumulated liquid in the condenser shell, the tank features a large capacity to accommodate condensate from the condenser shell. Furthermore, the tank is constructed of high-strength, corrosion-resistant material to adapt to the complex and changing working environment of power plants, ensuring long-term stable operation.

[0018] A vent pipe 2 is provided on the left side of the automatic drain tank 1, and a vent solenoid valve 22 is installed on the vent pipe 2. A manual vent valve 21 is also installed on the vent pipe 2. At the top of the automatic drain tank 1, the condenser shell-side upper connecting pipe 3 is tightly connected to the normally open solenoid valve 32, achieving a seamless connection between the condenser shell and the automatic drain tank 1. When the normally open solenoid valve 32 is in the open state, the condensate accumulated in the condenser shell can flow smoothly into the automatic drain tank 1. In order to cope with the need for manual operation in special circumstances, an upper manual valve 31 is installed on the condenser shell-side upper connecting pipe 3, providing the operator with another way to control fluid flow.

[0019] On the other side of the condenser shell, the condenser shell-side lower connecting pipe 4 is connected to the automatic drain tank 1 via a one-way valve 41. The design of one-way valve 41 ensures that fluid can only flow in one direction, that is, from the condenser shell into the automatic drain tank 1, effectively preventing the occurrence of condensate backflow. Similarly, a lower manual valve 42 is also installed on the condenser shell-side lower connecting pipe 4, providing convenient manual operation.

[0020] At the bottom of the automatic drain tank 1, a drain pipe 5 is responsible for draining the condensate from the tank. A second check valve 51 is installed on the drain pipe 5. When the controller 6 detects the time set by the time relay, it controls the vent solenoid valve 22 and the normally open solenoid valve 32, automatically draining the water from the drain tank through the check valves. A manual discharge valve 52 is also installed on the drain pipe 5.

[0021] During the entire operation of the device, the controller 6 automatically controls the draining of the drain device by controlling the draining time set by the time relay, and automatically adjusts the switching state of the drain solenoid valve 22 and the normally open solenoid valve 32 according to the set time. When the set time is reached, for example, the normally open solenoid valve 32 is open for 12 minutes and the drain solenoid valve 22 is closed for 12 minutes. After the time is up, the normally open solenoid valve 32 is closed for 2 minutes and the drain solenoid valve 22 is opened for 2 minutes. This constitutes one cycle.

[0022] Furthermore, the device boasts a high degree of flexibility and scalability. By adjusting the parameters in the controller 6, users can easily customize the device's operating conditions. Furthermore, the device can be linked with other power plant equipment for control, further improving the automation level and operational efficiency of the entire system.

[0023] This utility model provides a dedicated automatic condenser drain device for air-cooled Roots pumps in power plants. This device not only solves the existing problem of condenser liquid accumulation being unable to be automatically drained, but also improves the reliability and flexibility of the device through a combination of intelligent control and manual operation. Its simple structure, easy operation, and low maintenance cost make it a promising option for widespread application in the field of air-cooled Roots pumps in power plants.

[0024] The working principle and usage process of the present utility model are as follows: During operation, before startup, the controller 6 will perform a self-test, checking the status of each solenoid valve (the vent solenoid valve 22 and the normally open solenoid valve 32) and the manual valves (the vent manual valve 21, the upper manual valve 31, the lower manual valve 42, and the drain manual valve 52). After ensuring that there are no abnormalities, the vent solenoid valve 22 is closed and the normally open solenoid valve 32 is opened to ensure that the internal pressure of the drain tank is consistent with the vacuum pump system pressure, maintaining the same vacuum in the drain tank and the condenser. This allows condensate to flow from the condenser shell-side lower connecting pipe 4 through the check valve 41 into the automatic drain tank 1. At the same time, the check valve 41 ensures that condensate can only flow into the automatic drain tank in one direction, preventing backflow. After condensate continues to flow for 12 minutes, the controller 6 controls the time relay to close the normally open solenoid valve 32 and open the vent solenoid valve 22. The liquid in the automatic drain tank 1 is discharged through the drain pipe 5 and the check valve 51. This discharge time is 2 minutes. During the automatic drain process, if the controller 6 detects a fault in the control part and issues an alarm. At this point, the operator can intervene through the manual valves to ensure safe and stable system operation. If the automatic control system fails or special operations are required, the operator can directly control the flow of air and the discharge of accumulated liquid through the manual valves. For example, the ventilation manual valve 21, upper manual valve 31, lower manual valve 42, and discharge manual valve 52 can be manually opened or closed to adjust or maintain the system.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0028] While the embodiments described above are based on the present invention, these embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Clearly, many modifications and variations are possible based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better utilize the present invention and its modifications and uses. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic liquid draining device for condensers of air-cooled Roots pumps used in power plants, characterized in that: The invention comprises an automatic liquid drain tank (1), wherein a vent pipe (2) is provided on the left side of the automatic liquid drain tank (1), and a vent solenoid valve (22) is installed on the vent pipe (2); a condenser shell-side upper connecting pipe (3) is provided on the top of the automatic liquid drain tank (1), and a normally open solenoid valve (32) is installed on the condenser shell-side upper connecting pipe (3); a condenser shell-side lower connecting pipe (4) is provided on the adjacent side, and a one-way valve (41) is installed on the condenser shell-side lower connecting pipe (4); a liquid drain pipe (5) is provided on the bottom of the automatic liquid drain tank (1), and a one-way valve (51) is provided on the liquid drain pipe (5).

2. The automatic liquid draining device for a condenser specially used for an air-cooled Roots pump in a power plant according to claim 1, characterized in that: A ventilation manual valve (21) is also installed on the ventilation pipe (2), an upper manual valve (31) is installed on the upper connecting pipe (3) of the condenser shell side, a lower manual valve (42) is installed on the lower connecting pipe (4) of the condenser shell side, and a discharge manual valve (52) is installed on the drain pipe (5).

3. The automatic liquid draining device for a condenser specially used for an air-cooled Roots pump in a power plant according to claim 1, characterized in that: The vent solenoid valve (22) and the normally open solenoid valve (32) are commonly connected to a controller (6).

4. The automatic liquid draining device for a condenser specially used for an air-cooled Roots pump in a power plant according to claim 1, characterized in that: The automatic liquid drain tank (1) is additionally installed on the interstage condenser.

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