A glycol pump front double filter structure

Abstract

The utility model relates to a kind of glycol pump front double filter structure, belong to chemical process equipment technical field;Through the parallel design of main road and bypass, and share a H type connecting pipe, realize the flexible switching of main filter and vice filter.When main filter needs maintenance, vice filter can be opened first, and then main filter is closed, ensure that filter is always in action before delivery pump, realize no shutdown maintenance, greatly improve the continuous operation ability and safety of system;Main filter and vice filter structure are completely same, and all stop valve structures are consistent, which reduces the type and quantity of spare parts inventory, simplifies maintenance process, improves the standardization degree and management convenience of equipment.

Description

Technical Field

[0001] This utility model relates to the field of chemical process equipment technology, specifically to a dual filter structure for use before an ethylene glycol transfer pump. Background Technology

[0002] In chemical production, media such as ethylene glycol require strict filtration before entering the transfer pump to prevent solid impurities from damaging the pump body or clogging downstream equipment. Traditional pre-pump filters typically employ a single filter with a bypass configuration. When the main filter needs cleaning or cartridge replacement, the system switches to bypass operation, at which point the system loses its filtration function, posing a risk to the pump and equipment. While directly installing two parallel filters allows for switching, the system is complex, occupies a large space, and is costly. Furthermore, traditional filter cartridges are often installed horizontally or vertically, making it easy for residual liquid on the cartridges to drip during disassembly and maintenance, causing environmental pollution and material waste. Therefore, there is an urgent need for a compact, seamless, and easy-to-maintain pre-pump filter solution. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art by providing a dual filter structure before an ethylene glycol pump.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a dual filter structure before an ethylene glycol pump, including a main line and a bypass line, wherein the main line includes a main filter, a first shut-off valve and a second shut-off valve, and the bypass line includes a secondary filter and a third shut-off valve, and a connecting pipe connects the main line and the bypass line.

[0005] Preferably, the main filter includes a housing, a pressure cap, and a filter cartridge. The filter cartridge is located inside the housing, and the pressure cap is located on the top of the housing. The housing includes an inlet pipe and an outlet pipe. An inclined step is provided on the inner wall of the housing. The inclined step on the side of the inlet pipe is lower than the inlet pipe, and the inclined step on the side of the outlet pipe is higher than the outlet pipe.

[0006] Preferably, the top of the filter cartridge is provided with an inclined retaining ring that mates with the inclined step, and the filter cartridge is sealed and connected through the engagement of the inclined step and the inclined retaining ring.

[0007] Preferably, the auxiliary filter has the same structure as the main filter, and the second and third shut-off valves have the same structure as the first shut-off valve.

[0008] The first and third shut-off valves are connected to the outlet pipes of the main filter and the auxiliary filter, respectively. Preferably, the connecting pipe is connected between the first and second shut-off valves.

[0009] Preferably, the connecting pipe is H-shaped, including two inlets and two outlets. The two inlets are respectively connected to the first shut-off valve and the third shut-off valve, and a sealing head is connected to the outlet on the bypass side.

[0010] Preferably, the second shut-off valve is connected to the liquid outlet on one side of the main pipeline.

[0011] The beneficial effects of this utility model are: By using a parallel design of the main and bypass lines, and sharing a single H-shaped connecting pipe, flexible switching between the main and auxiliary filters is achieved. When the main filter requires maintenance, the auxiliary filter can be turned on first, and then the main filter can be turned off, ensuring that a filter is always in operation before the delivery pump. This enables maintenance without shutting down the system, greatly improving the system's continuous operation capability and safety. The main filter and the auxiliary filter have the same structure, and all shut-off valves also have the same structure. This reduces the types and quantities of spare parts in stock, simplifies the maintenance process, and improves the standardization and management convenience of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: 100, main path; 200, bypass; 1, main filter; 2, first shut-off valve; 3, second shut-off valve; 4, auxiliary filter; 5, third shut-off valve; 6, connecting pipe; 7, housing; 8, gland; 9, filter cartridge; 10, inlet pipe; 11, outlet pipe; 12, inclined step; 13, inclined retaining ring; 14, end cap. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0015] Example: A dual-filter structure before an ethylene glycol pump, such as... Figure 1 As shown, it includes a main line 100 and a bypass 200. The main line 100 includes a main filter 1, a first shut-off valve 2 and a second shut-off valve 3. The bypass 200 includes a secondary filter 4 and a third shut-off valve 5. A connecting pipe 6 connects the main line 100 and the bypass 200.

[0016] The main filter 1 includes a housing 7, a pressure cap 8, and a filter cylinder 9. The filter cylinder 9 is located inside the housing 7, and the pressure cap 8 is located on the top of the housing 7. The housing 7 includes an inlet pipe 10 and an outlet pipe 11. An inclined step 12 is provided on the inner wall of the housing 7. The inclined step 12 on the side of the inlet pipe 10 is lower than the inlet pipe 10, and the inclined step 12 on the side of the outlet pipe 11 is higher than the outlet pipe 11.

[0017] The top of the filter cartridge 9 is provided with an inclined retaining ring 13 that cooperates with the inclined step 12. The filter cartridge 9 is sealed and connected by the cooperation of the inclined step 12 and the inclined retaining ring 13.

[0018] The auxiliary filter 4 has the same structure as the main filter 1, and the second shut-off valve 3 and the third shut-off valve 5 have the same structure as the first shut-off valve 2.

[0019] The first shut-off valve 2 and the third shut-off valve 5 are connected to the outlet pipe 11 of the main filter 1 and the auxiliary filter 4, and the connecting pipe 6 is connected between the first shut-off valve 2 and the second shut-off valve 3.

[0020] The connecting pipe 6 is H-shaped and includes two inlets and two outlets. The two inlets are connected to the first shut-off valve 2 and the third shut-off valve 5, respectively. A sealing head 14 is connected to the outlet on one side of the bypass 200.

[0021] The second shut-off valve 3 is connected to the liquid outlet on one side of the main line 100.

[0022] The principle of this invention is as follows: the first shut-off valve 2 and the second shut-off valve 3 are opened, and the third shut-off valve 5 is closed. Ethylene glycol enters from the inlet pipe 10 of the main filter 1, is filtered by the filter cartridge 9, flows out from the outlet pipe 11, passes through the first shut-off valve 2, flows through the upper channel of the H-type connecting pipe 6, and flows out through the second shut-off valve 3. Switching and Maintenance: When the main filter 1 is clogged and needs cleaning, first open the third shut-off valve 5 to put the auxiliary filter 4 into operation; then close the first shut-off valve 2, at which point the system continues filtration through the bypass 200. The pressure cap 8 of the main filter 1 can then be opened, and the filter cartridge 9 can be removed for cleaning or replacement. After the main filter 1 is maintained, it should be reinstalled. First, open the first shut-off valve 2, then close the third shut-off valve 5. The system will then return to operation on the main line 100, with the auxiliary filter 4 as a backup.

[0023] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A dual-filter structure before an ethylene glycol pump, comprising a main channel (100) and a bypass channel (200), characterized in that: The main line (100) includes a main filter (1), a first shut-off valve (2) and a second shut-off valve (3), and the bypass (200) includes a secondary filter (4) and a third shut-off valve (5). A connecting pipe (6) connects the main line (100) and the bypass (200).

2. The ethylene glycol pre-pump dual filter structure according to claim 1, characterized in that: The main filter (1) includes a housing (7), a pressure cap (8), and a filter cartridge (9). The filter cartridge (9) is located inside the housing (7), and the pressure cap (8) is located on the top of the housing (7). The housing (7) includes an inlet pipe (10) and an outlet pipe (11). An inclined step (12) is provided on the inner wall of the housing (7). The inclined step (12) on the side of the inlet pipe (10) is lower than the inlet pipe (10), and the inclined step (12) on the side of the outlet pipe (11) is higher than the outlet pipe (11).

3. The dual-filter structure before an ethylene glycol pump according to claim 2, characterized in that: The top of the filter cartridge (9) is provided with an inclined retaining ring (13) that cooperates with the inclined step (12). The filter cartridge (9) is sealed and connected by the cooperation of the inclined step (12) and the inclined retaining ring (13).

4. The dual-filter structure before an ethylene glycol pump according to claim 1, characterized in that: The auxiliary filter (4) has the same structure as the main filter (1), and the second shut-off valve (3) and the third shut-off valve (5) have the same structure as the first shut-off valve (2).

5. The dual-filter structure before an ethylene glycol pump according to claim 2, characterized in that: The first shut-off valve (2) and the third shut-off valve (5) are connected to the outlet pipe (11) of the main filter (1) and the auxiliary filter (4), and the connecting pipe (6) is connected between the first shut-off valve (2) and the second shut-off valve (3).

6. The dual-filter structure before an ethylene glycol pump according to claim 5, characterized in that: The connecting pipe (6) is H-shaped and includes two inlets and two outlets. The two inlets are connected to the first shut-off valve (2) and the third shut-off valve (5) respectively. A cap (14) is connected to the outlet on the bypass (200) side.

7. The dual-filter structure before an ethylene glycol pump according to claim 6, characterized in that: The second shut-off valve (3) is connected to the outlet on one side of the main pipeline (100).

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