Device for accurately measuring liquid level of water storage tank of once-through boiler

Abstract

The utility model relates to the field of measuring devices, in particular to a once-through boiler water storage tank liquid level accurate measuring device which comprises a rectangular sliding rail, a rectangular fixing sleeve and a measuring device body. One side of the rectangular sliding rail is provided with a rectangular fixing sleeve which can slide and is used for fixing the measuring device body to drive the measuring device body to move, and the measuring device body used for measuring the liquid level of the water storage tank is arranged in the rectangular fixing sleeve; the measuring device body is placed on the inner side of the rectangular fixing sleeve and is contracted and fixed through the arc-shaped telescopic sleeve in the rectangular fixing sleeve, then the inclination angle of the rectangular sliding rail is adjusted, and then the rectangular fixing sleeve drives the measuring device body to move to different depths for liquid level measurement. The stability of the measuring system can be ensured, the stable measuring system can continuously and accurately provide liquid level information, reliable data support is provided for automatic control and remote monitoring of the boiler, and potential safety hazards caused by too high or too low liquid level are avoided.

Description

Technical Field

[0001] This utility model relates to the field of measuring devices, and in particular to a device for accurately measuring the liquid level of a DC boiler water storage tank. Background Technology

[0002] A once-through boiler does not have a steam drum; the entire boiler consists of many parallel pipes connected by headers. Under the pressure of the feedwater pump, the feedwater sequentially passes through the heating, evaporation, and superheating surfaces. That is, the working fluid flows along the boiler's steam-water pipes, completing the entire process of water heating, vaporization, and steam superheating in sequence. Finally, the steam is superheated to the given temperature. Since the movement of the working fluid is driven by the pressure of the feedwater pump, the working fluid flows in a forced manner through all the heating surfaces of the once-through boiler. The water level in the storage tank is an important monitoring point to ensure normal boiler water supply and prevent water from entering the turbine before unit startup and before the transition from a wet to a dry state.

[0003] Most existing measuring devices are placed directly into the water for measurement. If the tilt angle is insufficient, it may affect the flow state of the liquid inside the measuring device, leading to increased measurement error. This is especially true in differential pressure water level measuring devices. If the tilt angle of the sampling tube is insufficient or even close to horizontal, it will affect the gravity effect of the liquid inside the sampling tube, thus affecting the accurate measurement of the liquid level.

[0004] Therefore, since most of the existing measuring devices are placed directly into the water for measurement, insufficient tilt angle may affect the flow state of the liquid inside the measuring device, leading to increased measurement error and affecting the accurate measurement of liquid level. A precise liquid level measuring device for DC boiler water storage tank can be designed, with a fixed structure added to the measuring device to improve the accuracy of measurement. Utility Model Content

[0005] To overcome the problem that most existing measuring devices are placed directly into water for measurement, insufficient tilt angle may affect the flow of liquid inside the measuring device, leading to increased measurement error and thus affecting the accurate measurement of liquid level.

[0006] The technical solution of this utility model is as follows: a precise liquid level measuring device for a DC boiler water storage tank, comprising a rectangular slide rail, a rectangular fixing sleeve, and a measuring device body; one side of the rectangular slide rail is provided with a rectangular fixing sleeve that can slide to fix the measuring device body and drive it to move; the measuring device body for measuring the liquid level of the water storage tank is provided inside the rectangular fixing sleeve; one end of the rectangular slide rail is provided with a U-shaped frame, and a mounting hole is opened on one side of the U-shaped frame; a stud is transversely inserted through the end of the rectangular slide rail near the U-shaped frame; nuts are fitted on the outside of both ends of the stud; the rectangular slide rail is rotatably connected to the U-shaped frame through the stud.

[0007] Preferably, the measuring device body is placed inside the rectangular fixing sleeve, and then the arc-shaped telescopic sleeve in the rectangular fixing sleeve is used for contraction and fixation. Then, the tilt angle of the rectangular slide rail is adjusted, and then the rectangular fixing sleeve drives the measuring device body to move to different depths for liquid level measurement.

[0008] Preferably, a rectangular slide rail has a rectangular groove on one side, and a threaded rod passes through the inner side of the rectangular slide rail with the rectangular groove.

[0009] Preferably, the threaded rod is fitted with a rectangular threaded sleeve that is fixedly connected to the rectangular fixed sleeve.

[0010] Preferably, a rotating motor is installed at the lower end of the threaded rod.

[0011] Preferably, the rectangular fixing sleeve is surrounded by four sets of arc-shaped telescopic sleeves, and an arc-shaped telescopic plate is sleeved and connected between each two sets of arc-shaped telescopic sleeves. An arc-shaped rubber pad is installed on the inner side of the arc-shaped telescopic sleeve.

[0012] Preferably, a circular telescopic column is installed in the middle of the outer side of the arc-shaped telescopic sleeve, and a circular telescopic sleeve is fitted over the circular telescopic column.

[0013] Preferably, the circular telescopic sleeve passes through the rectangular fixed sleeve and is fixedly connected to it, and a cylinder is installed at the end of the circular telescopic sleeve away from the circular telescopic column.

[0014] The beneficial effects of this utility model are as follows: The measuring device body is placed inside the rectangular fixed sleeve, and is fixed by the arc-shaped telescopic sleeve in the rectangular fixed sleeve. Then, the tilt angle of the rectangular slide rail is adjusted, and then the rectangular fixed sleeve drives the measuring device body to move to different depths to measure the liquid level. By adding a fixing structure, the stability of the measuring system can be ensured. The stable measuring system can continuously and accurately provide liquid level information, providing reliable data support for the automatic control and remote monitoring of the boiler. This can help operators adjust the working status of the boiler in a timely manner and avoid safety hazards caused by excessively high or low liquid levels. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the water tank liquid level precision measuring device of this utility model.

[0016] Figure 2 The diagram shown is a schematic of the rectangular slide rail structure of the water tank liquid level precision measuring device of this utility model;

[0017] Figure 3 The diagram shown is a schematic of the rectangular fixing sleeve structure of the water tank liquid level precision measuring device of this utility model;

[0018] Figure 4 The diagram shown is a schematic of the arc-shaped rubber pad structure of the water tank level precision measuring device of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Rectangular slide rail; 2. Rectangular fixing sleeve; 3. Measuring device body; 101. Rectangular slide groove; 102. Threaded rod; 103. Rectangular threaded sleeve; 104. Rotating motor; 105. U-shaped frame; 106. Mounting hole; 107. Stud; 108. Nut; 201. Arc-shaped telescopic sleeve; 202. Arc-shaped telescopic plate; 203. Arc-shaped rubber pad; 204. Circular telescopic column; 205. Circular telescopic sleeve; 206. Cylinder. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment of a precise liquid level measuring device for a DC boiler water tank, comprising a rectangular slide rail 1, a rectangular fixing sleeve 2, and a measuring device body 3; one side of the rectangular slide rail 1 is provided with a rectangular fixing sleeve 2 that can slide to fix the measuring device body 3 and drive it to move; the rectangular fixing sleeve 2 is provided with a measuring device body 3 for measuring the liquid level of the water tank; one end of the rectangular slide rail 1 is provided with a U-shaped frame 105; one side of the U-shaped frame 105 is provided with a mounting hole 106; a stud 107 is transversely inserted through one end of the rectangular slide rail 1 near the U-shaped frame 105; nuts 108 are fitted on the outside of both ends of the stud 107; the rectangular slide rail 1 is rotatably connected to the U-shaped frame 105 through the stud 107.

[0022] Please see Figure 2 In this embodiment, a rectangular slide rail 1 has a rectangular groove 101 on one side, and a threaded rod 102 passes through the inner side of the rectangular groove 101, so that the rectangular threaded sleeve 103 drives the rectangular fixed sleeve 2 to move along the rectangular groove 101 on the rectangular slide rail 1. The threaded rod 102 is fitted with a rectangular threaded sleeve 103 that is fixedly connected to the rectangular fixed sleeve 2. The rectangular threaded sleeve 103 facilitates the movement of the measuring device body 3 to different depths for liquid level measurement. A rotary motor 104 is installed at the lower end of the threaded rod 102, and the threaded rod 102 rotates under the drive of the rotary motor 104.

[0023] Please see Figures 3-4In this embodiment, four sets of arc-shaped telescopic sleeves 201 are arranged around the inner side of the rectangular fixed sleeve 2. An arc-shaped telescopic plate 202 is sleeved and connected between every two sets of arc-shaped telescopic sleeves 201. An arc-shaped rubber pad 203 is installed on the inner side of the arc-shaped telescopic sleeve 201. At the same time, the arc-shaped telescopic plate 202 retracts along the arc-shaped telescopic sleeve 201 until the arc-shaped rubber pad 203 continuously approaches and adheres to the outer wall of the measuring device body 3, fixing it. A circular telescopic column 204 is installed in the middle of the outer side of the arc-shaped telescopic sleeve 201. A circular telescopic sleeve 205 is sleeved on the outside of the circular telescopic column 204. The circular telescopic column 204 drives the arc-shaped telescopic sleeve 201 to move along the circular telescopic sleeve 205. The circular telescopic sleeve 205 passes through the rectangular fixed sleeve 2 and is fixedly connected to it. A cylinder 206 is installed at the end of the circular telescopic sleeve 205 away from the circular telescopic column 204. Driven by the cylinder 206, the circular telescopic column 204 moves along the circular telescopic sleeve 205.

[0024] During operation, first take out the measuring device body 3 and place it inside the rectangular fixing sleeve 2. Then, driven by the cylinder 206, the circular telescopic column 204 drives the arc-shaped telescopic sleeve 201 to move along the circular telescopic sleeve 205. At the same time, the arc-shaped telescopic plate 202 retracts along the arc-shaped telescopic sleeve 201 until the arc-shaped rubber pad 203 continuously approaches and adheres to the outer wall of the measuring device body 3, thus fixing it. After the measuring device body 3 is fixed, first pick up the U-shaped frame 105 and pass the bolts through the mounting holes 106. This allows the U-shaped frame 105 to be positioned and connected to the inner wall of the water tank. Then, according to the required tilt angle, the nut 108 is loosened, allowing the rectangular slide rail 1 to rotate to the appropriate angle via the stud 107 and the U-shaped frame 105. After confirming that the angle is correct, the nut 108 is tightened. Then, driven by the rotating motor 104, the threaded rod 102 rotates, causing the rectangular threaded sleeve 103 to drive the rectangular fixed sleeve 2 to move along the rectangular slide groove 101 on the rectangular slide rail 1, facilitating the movement of the measuring device body 3 to different depths for liquid level measurement.

[0025] Through the above steps, the measuring device body 3 is placed inside the rectangular fixing sleeve 2, and then fixed by the arc-shaped telescopic sleeve 201 in the rectangular fixing sleeve 2. Next, the tilt angle of the rectangular slide rail 1 is adjusted, and then the rectangular fixing sleeve 2 drives the measuring device body 3 to move to different depths for liquid level measurement. By adding a fixing structure, the stability of the measuring system can be ensured. A stable measuring system can continuously and accurately provide liquid level information, providing reliable data support for the automatic control and remote monitoring of the boiler. This can help operators adjust the working status of the boiler in a timely manner and avoid safety hazards caused by excessively high or low liquid levels. This solves the problem that most existing measuring devices are directly placed in water for measurement, and if the tilt angle is insufficient, it may affect the flow state of the liquid inside the measuring device, leading to increased measurement errors and affecting the accurate measurement of liquid level.

Claims

1. A precise liquid level measuring device for a DC boiler water storage tank, comprising a rectangular slide rail (1); characterized in that: It also includes a rectangular fixing sleeve (2) and a measuring device body (3); one side of the rectangular slide rail (1) is provided with a rectangular fixing sleeve (2) that can slide to fix the measuring device body (3) and drive it to move. The rectangular fixing sleeve (2) is provided with a measuring device body (3) for measuring the liquid level of the water tank. One end of the rectangular slide rail (1) is provided with a U-shaped frame (105). One side of the U-shaped frame (105) is provided with a mounting hole (106). The rectangular slide rail (1) is provided with a stud (107) through the end near the U-shaped frame (105). Nuts (108) are provided on the outside of both ends of the stud (107). The rectangular slide rail (1) is rotatably connected to the U-shaped frame (105) through the stud (107).

2. The precise liquid level measuring device for a DC boiler water storage tank according to claim 1, characterized in that: A rectangular slide rail (1) has a rectangular groove (101) on one side, and a threaded rod (102) is inserted through the rectangular groove (101) inside the rectangular slide rail (1).

3. The precise liquid level measuring device for a DC boiler water storage tank according to claim 2, characterized in that: The threaded rod (102) is fitted with a rectangular threaded sleeve (103) which is fixedly connected to the rectangular fixed sleeve (2).

4. The precise liquid level measuring device for a DC boiler water storage tank according to claim 2, characterized in that: A rotating motor (104) is installed at the lower end of the threaded rod (102).

5. The precise liquid level measuring device for a DC boiler water storage tank according to claim 1, characterized in that: The rectangular fixed sleeve (2) is surrounded by four sets of arc-shaped telescopic sleeves (201). An arc-shaped telescopic plate (202) is sleeved and connected between each two sets of arc-shaped telescopic sleeves (201). An arc-shaped rubber pad (203) is installed on the inside of the arc-shaped telescopic sleeve (201).

6. The precise liquid level measuring device for a DC boiler water storage tank according to claim 5, characterized in that: A circular telescopic column (204) is installed in the middle of the outer side of the arc-shaped telescopic sleeve (201), and a circular telescopic sleeve (205) is fitted on the outside of the circular telescopic column (204).

7. The precise liquid level measuring device for a DC boiler water storage tank according to claim 6, characterized in that: A circular telescopic sleeve (205) passes through a rectangular fixed sleeve (2) and is fixedly connected to it. A cylinder (206) is installed at the end of the circular telescopic sleeve (205) away from the circular telescopic column (204).

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