Steam trap anti-clogging self-cleaning filter

Abstract

A steam trap anti-blocking self-cleaning filter, it includes filter body, the inner chamber of filter body is equipped with a circle filter core, the one end of filter body is equipped with air inlet pipe, the other end of filter body is equipped with air outlet pipe, and air inlet pipe is communicated with air outlet pipe between air inlet pipe and air outlet pipe and is equipped with back flushing pipe, air inlet pipe is equipped with first air inlet valve and second air inlet valve, and the air inlet port of back flushing pipe is installed between first air inlet valve and second air inlet valve, air outlet pipe is equipped with air outlet valve, and the air outlet port of back flushing pipe is installed between air outlet valve and filter body, back flushing pipe is equipped with back flushing valve.The utility model discloses beneficial effect is: the device has on-line cleaning, need not stop machine;Effectively protect the drain valve;Simple operation, save the cost and simple structure, easy to implement and so on the advantages.

Description

Technical Field

[0001] This utility model relates to a self-cleaning filter, specifically a self-cleaning filter for preventing clogging of steam traps. Background Technology

[0002] In industrial plants that use or produce large amounts of steam, such as those in metallurgy, chemical industry, and power generation, the steam transmission pipeline system is extensive, containing numerous steam traps. Steam traps are crucial devices for automatically removing condensate from steam pipelines, and their proper functioning is essential for ensuring the efficiency of the steam system.

[0003] However, steam pipelines experience frequent temperature and pressure changes during start-up, load changes, or maintenance. This thermal expansion and contraction, along with airflow impact, can easily cause rust, welding slag, scale, and other impurities to detach from the pipeline's inner wall. These impurities flow with steam and condensate in the pipeline, eventually accumulating at the inlet of the steam trap or its internal filter, causing blockage. Once the steam trap is blocked, condensate cannot be discharged properly, leading to water accumulation in the pipeline. This not only reduces steam quality and heat transfer efficiency, resulting in significant energy waste, but may also cause leaks at the connecting flanges due to abnormally high internal system pressure, resulting in "running, leaking, and dripping" phenomena, further increasing energy loss and safety risks.

[0004] Currently, the main method for resolving steam trap blockage is periodic steam shutdown and maintenance, where maintenance personnel disassemble the steam trap and manually clean or replace its internal filter elements. This method not only increases the labor intensity and working hours of maintenance personnel but also requires interrupting the steam supply, affecting the continuity and stability of the production process. Furthermore, frequent disassembly and reassembly can easily lead to a decline in the sealing performance of the steam trap, shortening its service life.

[0005] Therefore, there is an urgent need for a device that can clean impurities in front of steam traps online without interrupting the steam supply, so as to completely improve the current situation where steam traps are prone to clogging and difficult to maintain. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings and defects of the existing technology by providing a self-cleaning filter for preventing clogging of steam traps, so as to realize online filtration and backflushing cleaning before the steam trap, significantly reducing maintenance frequency and labor intensity.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a self-cleaning filter for preventing clogging of steam traps, comprising a filter body, an inner cavity of which is provided with a filter element, an air inlet pipe installed at one end of the filter body, an air outlet pipe installed at the other end of the filter body, and a backflush pipe connecting the air inlet pipe and the air outlet pipe, a first air inlet valve and a second air inlet valve installed on the air inlet pipe, and the air inlet port of the backflush pipe installed between the first air inlet valve and the second air inlet valve, an air outlet valve installed on the air outlet pipe, and the air outlet port of the backflush pipe installed between the air outlet valve and the filter body, and a backflush valve installed on the backflush pipe.

[0008] Furthermore, a flange cover is installed on the top of the filter body, and a drain valve is installed on the bottom of the filter body.

[0009] Furthermore, the air inlet of the air inlet pipe is higher than the top edge of the filter element, and the air outlet of the air outlet pipe is located in the middle of the filter element.

[0010] Furthermore, the inner diameter of the air inlet pipe is the same as the inner diameter of the air outlet pipe.

[0011] Furthermore, the first intake valve, the second intake valve, the backflush valve, and the drain valve are selected as manual ball valves or quick-opening valves.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This device has at least the following advantages: 1. Online cleaning without shutdown: The entire cleaning process of filtration-backflushing-drainage can be achieved by switching valves, without disassembling the steam trap or stopping the steam supply, ensuring the continuity of production.

[0013] 2. Effective protection of steam traps: The pre-filter can intercept most impurities, fundamentally solving the problem of steam trap clogging and greatly extending its service life.

[0014] 3. Simple operation and cost-saving: The operation can be completed by a single person during the inspection process, which greatly reduces the input and labor intensity of professional maintenance personnel and lowers maintenance costs.

[0015] 4. Simple structure and easy to implement: The device has a simple structural design and can be made using existing valves and fittings. The modification cost is low and it is easy to promote and install on existing steam pipelines. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the usage state of this utility model (the arrows indicate the flow direction of steam and condensate).

[0019] Figure 3 This is a schematic diagram of the backflushing cleaning state of this utility model (the arrows indicate the flow direction of steam and condensate).

[0020] Explanation of reference numerals in the attached drawings: 1. Inlet pipe; 2. First inlet valve; 3. Second inlet valve; 4. Backflush pipe; 5. Backflush valve; 6. Flange cover; 7. Outlet valve; 8. Outlet pipe; 9. Filter body; 10. Drain valve; 11. Filter element. Detailed Implementation Example

[0021] See Figure 1 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a filter body 9, the inner cavity of the filter body 9 is provided with a filter element 11, one end of the filter body 9 is equipped with an air inlet pipe 1, the other end of the filter body 9 is equipped with an air outlet pipe 8, and a backflush pipe 4 is connected between the air inlet pipe 1 and the air outlet pipe 8. A first air inlet valve 2 and a second air inlet valve 3 are installed on the air inlet pipe 1, and the air inlet port of the backflush pipe 4 is installed between the first air inlet valve 2 and the second air inlet valve 3. An air outlet valve 7 is installed on the air outlet pipe 8, and the air outlet port of the backflush pipe 4 is installed between the air outlet valve 7 and the filter body 9. A backflush valve 5 is installed on the backflush pipe 4.

[0022] More specifically, a flange cover 6 is installed on the top of the filter body 9, and a drain valve 10 is installed on the bottom of the filter body 9. The flange cover 6 can form a chamber inside the filter body 9 to prevent gas from leaking from the top of the filter body 9, while the drain valve 10 can discharge debris from the filter body 9.

[0023] More specifically, the air inlet of the air inlet pipe 1 is higher than the top edge of the filter element 11, and the air outlet of the air outlet pipe 8 is located in the middle of the filter element 11. This allows condensate or steam to enter the filter body 9 more smoothly and filter impurities through the filter element 11. The filtered condensate and steam are then discharged from the air outlet pipe 8.

[0024] To be more specific, the inner diameter of the intake pipe 1 is the same as the inner diameter of the exhaust pipe 8.

[0025] More specifically, the first intake valve 2, the second intake valve 3, the backflush valve 5, and the drain valve 10 are selected as manual ball valves or quick-opening valves. Example

[0026] The difference between this embodiment and Embodiment 1 is that the first intake valve 2, the second intake valve 3, the backflush valve 5, and the drain valve 10 are all solenoid valves. Solenoid valves allow operators to more easily control the opening and closing of each valve, further reducing their workload.

[0027] The working principle of this utility model is as follows: During normal filtration, the first inlet valve 2, the second inlet valve 3, and the outlet valve 7 of this self-cleaning filter are open, while the backflush valve 5 and the drain valve 10 are closed. At this time, the main steam flow carries impurities such as rust and welding slag from the pipeline into the filter body 9 through the inlet pipe 1. Subsequently, the steam and condensate pass through the filter element 11 inside the filter body 9. The filter element 11 effectively intercepts and adsorbs these impurities. The filtered clean steam and condensate flow out through the outlet pipe 8 and enter the subsequent network pipe, ensuring normal operation. For normal filtration, please refer to... Figure 2 As shown, during backflushing cleaning, the first inlet valve 2, backflushing valve 5, and drain valve 10 are open, while the outlet valve 7 and the second inlet valve 3 are closed. At this time, steam enters the backflushing pipe 4 from the inlet pipe 1 and then enters the filter body 9 through the outlet of the outlet pipe 8. The steam flow direction is opposite to that during normal filtration; it performs a high-intensity reverse flush from the outside to the inside of the filter element 11. This reverse airflow and pressure effectively peel and shake off impurities adhering to the outer surface of the filter screen. The peeled impurities, under the combined action of their own gravity and the steam purging force, enter the bottom of the filter body 9 and are discharged from the drain valve 10. Backflushing cleaning allows this self-cleaning filter to have a longer service life and reduces the workload of operators. For backflushing cleaning instructions, please refer to... Figure 3 As shown, staff can select different types of valves according to their actual needs.

[0028] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A self-cleaning filter for preventing clogging of steam traps, characterized in that: It includes a filter body (9), the inner cavity of which is provided with a filter element (11), an air inlet pipe (1) is installed at one end of the filter body (9), an air outlet pipe (8) is installed at the other end of the filter body (9), and a backflush pipe (4) is connected between the air inlet pipe (1) and the air outlet pipe (8). A first air inlet valve (2) and a second air inlet valve (3) are installed on the air inlet pipe (1), and the air inlet port of the backflush pipe (4) is installed between the first air inlet valve (2) and the second air inlet valve (3). An air outlet valve (7) is installed on the air outlet pipe (8), and the air outlet port of the backflush pipe (4) is installed between the air outlet valve (7) and the filter body (9). A backflush valve (5) is installed on the backflush pipe (4).

2. The self-cleaning filter for preventing clogging of a steam trap according to claim 1, characterized in that: The filter body (9) is equipped with a flange cover (6) on top and a drain valve (10) on the bottom.

3. A self-cleaning filter for preventing clogging of a steam trap according to claim 1, characterized in that: The air inlet of the air inlet pipe (1) is higher than the top edge of the filter element (11), and the air outlet of the air outlet pipe (8) is located in the middle of the filter element (11).

4. A self-cleaning filter for preventing clogging of a steam trap according to claim 1, characterized in that: The inner diameter of the air inlet pipe (1) is the same as the inner diameter of the air outlet pipe (8).

5. A self-cleaning filter for preventing clogging of a steam trap according to claim 1, characterized in that: The first intake valve (2), the second intake valve (3), the backflush valve (5), and the drain valve (10) are all manual ball valves.

6. A self-cleaning filter for preventing clogging of a steam trap according to claim 1, characterized in that: The first intake valve (2), the second intake valve (3), the backflush valve (5), and the drain valve (10) are all solenoid valves.

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