An integrated liquid level pressure alarm measuring device

Abstract

The utility model relates to an integrated liquid level pressure alarm measuring device, which is arranged on the side wall of a boiler cavity and comprises a digital pressure transmitting switch, welded liquid level sight glasses, a high liquid level electrode, a low liquid level electrode, a spiral cooling pipe, a pressure instrument support, a flat end cover and a large-diameter communication pipe. One end of the large-diameter communication pipe is welded to the side wall of the boiler cavity, and the other end is welded to the flat end cover. The flat end cover is connected to the welded liquid level sight glasses and the spiral cooling pipe. Two welded liquid level sight glasses are diagonally arranged. The spiral cooling pipe is screwed to the digital pressure transmitting switch. The high liquid level electrode and the low liquid level electrode are inserted into the large-diameter communication pipe. The digital pressure transmitting switch is supported on the welded liquid level sight glasses by the pressure instrument support. The utility model integrates multiple instruments, reduces leakage points, facilitates operation observation, concentrates wiring, and is convenient for maintenance and overall replacement during maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum boiler equipment components, specifically to an integrated liquid level and pressure alarm and measuring device. Background Technology

[0002] A vacuum boiler is a sealed cavity with a built-in steam-water heat exchanger at the top. The lower part of the cavity holds the heat transfer medium, water. Before operation, the cavity is evacuated to a vacuum. Then, electrical energy or fuel chemical energy is converted into heat energy to heat the water in the lower cavity. The water absorbs heat and becomes negative-pressure steam. This steam then condenses and exchanges heat with the cold water in the top steam-water heat exchanger, returning to the bottom of the cavity to be heated back into steam. This cycle repeats, transferring heat energy to the top heat exchanger to heat the cold water into hot water for user use. During this process, because the boiler's sealed cavity is under negative pressure, poor sealing can easily allow air to leak in. Air is a non-condensable gas, and its mixing with steam will affect heat transfer. Generally, a 1% air mixture can reduce the heat transfer coefficient by more than 60%. Therefore, the sealing performance of a vacuum boiler cavity is a crucial factor affecting boiler energy efficiency.

[0003] Currently, the liquid level alarm, liquid level display, pressure alarm, pressure measurement, and display of vacuum boilers are generally arranged separately and independently, and are mostly fixed by flanges or threads. This design results in a dispersed layout and numerous leakage points. Although boiler manufacturers perform helium leak testing on the entire equipment before it leaves the factory to reduce the leakage rate of welds, valves, instruments, flanges, and threaded interfaces, they do not consider the impact of vibration. Vibration will occur during transportation or when the heat transfer medium vaporizes under high negative pressure, especially affecting the removable sealing surfaces such as flanges and threads, causing leakage. When the equipment is delivered to the user's site or has been running for a period of time, leaks are likely to occur and are difficult to detect. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an integrated liquid level and pressure alarm measurement device. It integrates multiple instruments to realize functions such as local liquid level display, liquid level alarm, local pressure display, remote pressure measurement, and pressure alarm, thereby reducing leakage points and ensuring high-quality and stable operation of vacuum hot water boilers.

[0005] The purpose of this utility model is achieved as follows: An integrated liquid level and pressure alarm measuring device is installed on the side wall of a boiler cavity. It includes a digital pressure transmitter switch, a welded liquid level sight glass, a high-level electrode, a low-level electrode, a spiral cooling pipe, a pressure instrument bracket, a flat end cap, and a large-diameter connecting pipe. One end of the large-diameter connecting pipe is welded to the side wall of the boiler cavity, and the other end is welded to the flat end cap. The flat end cap connects the welded liquid level sight glass and the spiral cooling pipe. The two welded liquid level sight glasses are arranged diagonally. The spiral cooling pipe is screwed to the digital pressure transmitter switch. The high-level electrode and the low-level electrode are inserted into the large-diameter connecting pipe. The digital pressure transmitter switch is supported on the welded liquid level sight glass by the pressure instrument bracket.

[0006] Preferably, the pressure gauge bracket is fixed to a low-position welded liquid level sight glass.

[0007] Preferably, the visible liquid level portions of the two welded liquid level sight glasses overlap.

[0008] Preferably, the welded liquid level sight glass includes a sight glass and a sight glass connecting pipe, and the sight glass and the sight glass connecting pipe are integrally sintered.

[0009] Preferably, the high-level electrode, the low-level electrode, and the electrode mounting base corresponding to the top of the large-diameter connecting pipe are threadedly connected and fixed.

[0010] Preferably, the top of the flat end cap is provided with a grounding bolt.

[0011] Preferably, the threaded ends of each liquid level electrode and the threaded ends of the digital pressure transmitter switch are sealed with silicone rubber thread sealant.

[0012] The beneficial effects of this utility model are: By integrating multiple instruments, the system can realize functions such as local liquid level display, liquid level alarm, local pressure display, remote pressure measurement, and pressure alarm, thereby reducing leakage points and ensuring high-quality and stable operation of the vacuum hot water boiler. Meanwhile, the integrated and centralized arrangement of pressure and water level instruments facilitates operational observation, centralized wiring and connection, and also makes maintenance, repair and overall replacement easier. Using multiple level sight glasses facilitates standardized design, reduces costs, and provides convenience for installing pressure instrument brackets. The mounting brackets for supporting digital pressure transmitter switches are fixed on the lower level sight glasses, which provides vibration protection and reduces or even avoids leakage due to loose threads. Attached Figure Description

[0013] Figure 1 This is a front view of an integrated liquid level and pressure alarm measuring device according to the present invention.

[0014] Figure 2 for Figure 1 The left view.

[0015] Figure 3 for Figure 1 The right view.

[0016] Figure 4 for Figure 1 Top view.

[0017] Figure 5 This is a schematic diagram of the internal structure of an integrated liquid level and pressure alarm measuring device according to the present invention.

[0018] The components include: 1. Digital pressure transmitter switch; 2. Welded level sight glass; 2.1. Sight glass; 2.2. Sight glass connector; 2.3. Extension connector; 3. High level electrode; 4. Low level electrode; 5. Spiral cooling pipe; 6. Pressure instrument bracket; 7. Flat end cover; 8. Large diameter connecting pipe; 9. Boiler cavity; 10. Grounding bolt. Detailed Implementation

[0019] See Figure 1-5 This utility model relates to an integrated liquid level and pressure alarm measuring device, which is installed on the side wall of a boiler cavity 9. It includes a digital pressure transmitter switch 1, a welded liquid level sight glass 2, a high liquid level electrode 3, a low liquid level electrode 4, a spiral cooling pipe 5, a pressure instrument bracket 6, a flat end cap 7, and a large-diameter connecting pipe 8. One end of the large-diameter connecting pipe 8 is welded to the side wall of the boiler cavity 9, and the other end is welded to the flat end cap 7. The flat end cap 7 connects the welded liquid level sight glass 2 and the spiral cooling pipe 5. The flat end cap 7 has connecting holes corresponding to the welded liquid level sight glass 2 and the spiral cooling pipe 5, allowing the welded liquid level sight glass 2 and the spiral cooling pipe 5 to communicate with the boiler cavity 9. The level sight glass 2 is arranged diagonally. The spiral cooling pipe 5 is screwed to the digital pressure transmitter switch 1. The digital pressure transmitter switch 1 has local display, remote pressure transmission and pressure alarm functions. The spiral cooling pipe 5 is made of copper and has a spiral design to cool the steam in the boiler and prevent the steam from directly eroding the instrument. The high level electrode 3 and low level electrode 4 are inserted in the large-diameter connecting pipe 8. The digital pressure transmitter switch 1 is supported on the welded level sight glass 2 by the pressure instrument bracket 6. The pressure instrument bracket 6 is fixed on the low-position welded level sight glass 2 to prevent and reduce the impact of vibration during transportation and operation on the threaded interface.

[0020] The visible liquid level portions of the two welded level sight glasses 2 overlap by at least 10mm, resulting in a large visible area. Taking two DN100 welded level sight glasses as an example, the width of the visible water level line within the normal liquid level range is no less than 60mm. Under natural light, the wider the visible water level line, the greater the light intake, and the easier it is to observe the actual water level position. Furthermore, using multiple sight glasses facilitates standardized design and reduces costs.

[0021] The welded level sight glass 2 includes a sight glass 2.1 and a sight glass connector 2.2. The sight glass 2.1 and the sight glass connector 2.2 are joined together using a sintering process. This integrated design ensures the sealing performance of the level sight glass. From actual operating experience, as a component of a vacuum hot water boiler, this sintered level sight glass has a much longer service life than the detachable type, and it avoids problems such as loosening and leakage, and glass breakage due to uneven stress, thus ensuring high safety. One end of the sight glass connector 2.2 is connected to the flat end cap 7 via an extension connector 2.3. The extension connector 2.3 ensures that the level sight glass and the pressure gauge above are on the same plane, facilitating subsequent observation and equipment outsourcing. One end of the extension connector 2.3 is welded to the sight glass connector 2.2, and the other end is welded to the flat end cap 7.

[0022] The high-level electrode 3 and low-level electrode 4 are threadedly connected to the electrode mounting bases corresponding to the top of the large-diameter connecting pipe 8 to monitor the liquid level of the heat medium water flowing into the large-diameter connecting pipe 8. The top of the flat end cover 7 is provided with a grounding bolt 10. Under the combined action of the grounding bolt 10 and the high and low level electrodes 3 and 4, the functions of high and low water level alarm, low electrode water replenishment alarm and high electrode heat exchanger leakage alarm are realized.

[0023] The threaded ends of each liquid level electrode and the threaded end of the digital pressure transmitter switch 1 are all sealed with silicone rubber thread sealant to improve sealing performance.

[0024] A large-diameter connecting pipe 8 is used to connect to the boiler cavity 9, thereby ensuring the overall rigidity of the device and ensuring that the instruments on it will not leak due to vibration during transportation and operation.

[0025] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. An integrated liquid level and pressure alarm measuring device, characterized in that: It is installed on the side wall of the boiler cavity and includes a digital pressure transmitter switch, a welded level sight glass, a high level electrode, a low level electrode, a spiral cooling pipe, a pressure instrument bracket, a flat end cap, and a large-diameter connecting pipe. One end of the large-diameter connecting pipe is welded to the side wall of the boiler cavity, and the other end is welded to the flat end cap. The flat end cap connects the welded level sight glass and the spiral cooling pipe. The two welded level sight glasses are arranged diagonally. The spiral cooling pipe is screwed to the digital pressure transmitter switch. The high level electrode and the low level electrode are inserted into the large-diameter connecting pipe. The digital pressure transmitter switch is supported on the welded level sight glass by the pressure instrument bracket.

2. The integrated liquid level and pressure alarm measuring device according to claim 1, characterized in that: The pressure gauge bracket is fixed to a low-position welded liquid level sight glass.

3. The integrated liquid level and pressure alarm measuring device according to claim 1, characterized in that: The visible liquid level portions of the two welded liquid level sight glasses overlap.

4. The integrated liquid level and pressure alarm measuring device according to claim 1, characterized in that: The welded liquid level sight glass includes a sight glass and a sight glass connecting pipe, which are integrally sintered.

5. The integrated liquid level and pressure alarm measuring device according to claim 1, characterized in that: The high-level electrode, low-level electrode, and corresponding electrode mounting base at the top of the large-diameter connecting pipe are threaded and fixed.

6. The integrated liquid level and pressure alarm measuring device according to claim 1, characterized in that: The top of the flat end cap is equipped with a grounding bolt.

7. The integrated liquid level and pressure alarm measuring device according to claim 5, characterized in that: The threaded ends of each liquid level electrode and the threaded ends of the digital pressure transmitter switch are all sealed with silicone rubber thread sealant.

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