A vacuum pump pressure alarm device

Abstract

This utility model relates to the field of thermal power generation technology, specifically a vacuum pump pressure alarm device, including a pressure transmitter, a mounting bracket for fixing the pressure transmitter, a metal tube one connected at the top to the pressure transmitter's detection tube, and a metal tube two welded at the bottom to the vacuum pump pipeline. The bottom end of the metal tube one and the top end of the metal tube two are connected by a flexible hose. Because the metal tube one and the metal tube two are connected by a flexible hose, the deformation of the hose isolates the vibration of the vacuum pump, avoiding the impact of the vacuum pump's vibration on the pressure transmitter, thus making the pressure transmitter's detection results more accurate. This utility model can effectively avoid the influence of vacuum pump vibration on the pressure parameter detection value, resulting in more accurate detection results, ensuring the normal production order of the power plant, and reducing the workload and difficulty of operation and maintenance personnel.

Description

Technical Field

[0001] This utility model relates to the field of thermal power generation technology, specifically a vacuum pump pressure alarm device. Background Technology

[0002] In thermal power plants, vacuum pumps are crucial equipment for establishing a vacuum environment in the steam turbine. For every 1 kPa decrease in condenser vacuum, the unit's power generation efficiency decreases by approximately 0.8. By maintaining a low-pressure environment, vacuum pumps allow steam to condense at low temperatures, fully releasing latent heat and improving the thermal cycle rate. Pressure is a key parameter in the operation of vacuum pumps, and accurate pressure detection is of great significance for ensuring the normal operation of vacuum pumps and the overall operating efficiency and safety of the power plant. Currently, most vacuum pump pressure detection relies on pressure switches installed on the vacuum pump pipeline. However, because the pressure switches are directly installed on the vacuum pump pipeline, they are affected by the vibration of the vacuum pump, resulting in low accuracy of the pressure parameter detection values. This makes it difficult for pressure switches to meet the pressure parameter detection requirements, which not only affects the normal production order of the power plant but also increases the workload and difficulty of maintenance personnel. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned shortcomings by providing a vacuum pump pressure alarm device that effectively avoids the impact of vacuum pump vibration on pressure parameter detection values, resulting in more accurate detection results, ensuring the normal production order of the power plant, and reducing the workload and difficulty of maintenance personnel.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A vacuum pump pressure alarm device includes a pressure transmitter, a mounting bracket for fixing the pressure transmitter, a metal tube one connected at the top to the detection tube of the pressure transmitter, and a metal tube two welded at the bottom to the vacuum pump pipeline. The bottom end of the metal tube one and the top end of the metal tube two are connected by a flexible hose.

[0006] Furthermore, it also includes an alarm and a controller mounted on a mounting bracket, both of which are electrically connected to the controller.

[0007] Furthermore, the detection tube of the pressure transmitter is provided with an external thread. The metal tube includes a tube body and a nut rotatably connected to the top of the tube body. The tube body is screwed to the external thread through the nut, connecting the metal tube to the pressure transmitter.

[0008] Furthermore, the connection between the metal tube and the flexible tube is coated with a sealant layer.

[0009] Furthermore, the flexible tube is a copper tube.

[0010] Furthermore, the operating pressure range of the pressure transmitter is 0 to -100 kPa.

[0011] Furthermore, the mounting bracket is an L-shaped frame, the horizontal part of which is fixed to the ground or indoor ceiling, and the pressure transmitter is installed on the vertical part of the L-shaped frame.

[0012] Furthermore, metal tubes three are connected to both ends of the hose, and the end of the metal tube three away from the hose is provided with an external thread two. The metal tube one and the metal tube two are respectively provided with internal thread holes for screwing the external thread two.

[0013] Furthermore, a manual valve is provided on the second metal tube.

[0014] The beneficial effects of this utility model are:

[0015] In practical applications, the pressure transmitter is installed using a mounting bracket to detect the pressure within the vacuum pump pipeline. Since metal pipe one and metal pipe two are connected by a flexible hose, the deformation of the hose isolates the vacuum pump's vibration, preventing its impact on the pressure transmitter and resulting in more accurate readings. This invention effectively avoids the influence of vacuum pump vibration on pressure parameter readings, ensuring more accurate results, maintaining normal power plant production, and reducing the workload and difficulty for maintenance personnel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is the front view of this utility model;

[0018] Figure 3 This is the front right view of this utility model;

[0019] Reference numerals in the attached diagram: 1. Pressure transmitter; 2. Mounting bracket; 3. Metal tube 1; 31. Tube body; 32. Nut; 4. Metal tube 2; 5. Hose; 51. Metal tube 3; 6. Alarm; 7. Controller; 8. Sealing layer; 9. Manual valve. Detailed Implementation

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a vacuum pump pressure alarm device includes a pressure transmitter 1, a mounting bracket 2 for fixing the pressure transmitter 1, a metal tube 3 connected at the top to the detection tube of the pressure transmitter 1, and a metal tube 4 welded at the bottom to the vacuum pump pipeline. The bottom end of the metal tube 3 and the top end of the metal tube 4 are connected by a flexible hose 5.

[0021] In use, the pressure transmitter 1 is installed using the mounting bracket 2, and the pressure transmitter 1 is used to detect the pressure in the vacuum pump pipeline. Since metal pipe 3 and metal pipe 4 are connected by a flexible hose 5, the deformation of the flexible hose 5 isolates the vibration of the vacuum pump, avoiding the impact of the vacuum pump vibration on the pressure transmitter 1, making the detection results of the pressure transmitter 1 more accurate. This utility model can effectively avoid the influence of vacuum pump vibration on the pressure parameter detection value, making the detection results more accurate, ensuring the normal production order of the power plant, and reducing the workload and difficulty of operation and maintenance personnel.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, it also includes an alarm 6 and a controller 7 installed on the mounting bracket 2. The pressure transmitter 1 and the alarm 6 are both electrically connected to the controller 7. In this embodiment, the detection result of the pressure transmitter 1 is sent to the controller 7. When the pressure in the vacuum pump pipeline exceeds the preset value, the controller 7 controls the alarm 6 to sound an alarm.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, the detection tube of the pressure transmitter 1 is provided with an external thread. The metal tube 3 includes a tube body 31 and a nut 32 rotatably connected to the top of the tube body 31. The tube body 31 is screwed with the external thread through the nut 32, connecting the metal tube 3 to the pressure transmitter 1. In this embodiment, the metal tube 3 is connected to the pressure transmitter 1 by screwing the external thread through the nut 32 onto the tube body 31, making it more convenient to install and remove the pressure transmitter 1. When the nut 32 is tightened with the external thread, the top of the tube body 31 presses against the detection tube of the pressure transmitter 1.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the connection between the metal tube 4 and the hose 5 is coated with a sealant layer 8. In this embodiment, since the vacuum pump pipeline is under continuous vibration, applying a sealant layer 8 to the connection between the metal tube 4 and the hose 5 can further improve the sealing effect between the metal tube 4 and the hose 5 and extend its service life.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the flexible hose 5 is a copper tube; in this embodiment, the flexible hose 5 made of copper tube has good ductility and bending ability, and can effectively isolate the vibration generated by the vacuum pump pipeline.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, the working pressure range of the pressure transmitter 1 is 0 to -100 kPa. In this embodiment, when the working pressure range of the pressure transmitter 1 is 0 to -100 kPa, this application can be applied to the pressure detection of various thermal power generation pipelines, and has better applicability.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the mounting bracket has two L-shaped frames. The horizontal part of the L-shaped frame is fixed to the ground or indoor ceiling, and the pressure transmitter 1 is installed on the vertical part of the L-shaped frame. In this embodiment, the pressure transmitter 1 is fixed by the horizontal part of the L-shaped frame and installed on the vertical part.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the two ends of the flexible hose 5 are respectively connected to metal tubes 3 and 4. The end of the metal tube 3 and 4 away from the flexible hose 5 is provided with an external thread 2. The metal tube 3 and metal tube 4 are respectively provided with internal thread holes for screwing the external thread 2. In this embodiment, the installation of the flexible hose 5 is more convenient by screwing the internal thread holes of the external thread 2.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a manual valve 9 is provided on the metal pipe 4; in this embodiment, the on / off state of the metal pipe 4 can be controlled by the manual valve 9.

[0030] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by this utility model.

Claims

1. A vacuum pump pressure alarm device, characterized by: Includes a pressure transmitter (1), a mounting bracket (2) for fixing the pressure transmitter (1), a metal tube (3) with its top end connected to the detection tube of the pressure transmitter (1), and a metal tube (4) with its bottom end welded to the vacuum pump pipeline. The bottom end of the metal tube (3) and the top end of the metal tube (4) are connected by a flexible hose (5).

2. The vacuum pump pressure alarm device according to claim 1, characterized in that, It also includes an alarm (6) and a controller (7) mounted on the mounting bracket (2), wherein the pressure transmitter (1) and the alarm (6) are electrically connected to the controller (7).

3. The vacuum pump pressure alarm device according to claim 1, characterized in that, The pressure transmitter (1) has an external thread on its detection tube. The metal tube (3) includes a tube body (31) and a nut (32) rotatably connected to the top of the tube body (31). The tube body (31) is screwed with the external thread through the nut (32) to connect the metal tube (3) to the pressure transmitter (1).

4. The vacuum pump pressure alarm device according to claim 1, characterized in that, The connection between the metal tube (4) and the hose (5) is coated with a sealant layer (8).

5. A vacuum pump pressure alarm device according to claim 1, characterized in that, The flexible tube (5) is a copper tube.

6. A vacuum pump pressure alarm device according to claim 1, characterized in that, The working pressure range of the pressure transmitter (1) is 0 to -100 kPa.

7. A vacuum pump pressure alarm device according to claim 1, characterized in that, The mounting bracket (2) is an L-shaped frame, the horizontal part of which is fixed to the ground or indoor ceiling, and the pressure transmitter (1) is installed on the vertical part of the L-shaped frame.

8. A vacuum pump pressure alarm device according to claim 1, characterized in that, The two ends of the hose (5) are respectively connected to metal tube three (51). The end of the metal tube three (51) away from the hose (5) is provided with external thread two. The metal tube one (3) and the metal tube two (4) are respectively provided with internal thread holes for screwing external thread two.

9. A vacuum pump pressure alarm device according to claim 1, characterized in that, A manual valve (9) is provided on the metal tube 2 (4).

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