Pipeline filtering device

By using a combination of a check valve and a filter in the pipeline filtration device of the liquid rocket engine test bench, ensuring that the medium flows through the filter in the same direction, solving the filter contamination problem caused by the reverse flow of excess, and improving the system cleanliness and filter life.

CN222983948UActive Publication Date: 2025-06-17ZHONGKE AEROSPACE (GUANGZHOU) AEROSPACE MANUFACTURING IND CO LTD
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Patent Information

Application Number
CN202421738967.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-22
Publication Date
2025-06-17
Estimated Expiration
2034-07-22

AI Technical Summary

Technical Problem

During the gas production and emission process of the liquid rocket engine test bench, excess flows in the pipeline in reverse, resulting in multiple contamination of the filter and damage to the filter.

Method used

A pipe filter device is designed, using a combination of a check valve and a filter to ensure that the medium flows through the filter in the same direction, regardless of which port it flows in, to prevent excess from accumulating on the filter inlet side.

Benefits of technology

It effectively solves the problem of excess flowing back and forth in the pipeline, improves the cleanliness of the system, and extends the service life of the filter.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a pipeline filtering device, and relates to the technical field of spaceflight liquid rocket engine test bed. The pipeline filtering device is provided with a port A and a port B; comprising a filter, a first check valve, a second check valve, a third check valve and a fourth check valve, the inlet of the first one-way valve is communicated with the port B; the outlet of the first one-way valve is communicated with the inlet of the filter; the inlet of the second one-way valve is communicated with the port A; the outlet of the second one-way valve is communicated with the inlet of the filter; an inlet of the third one-way valve is communicated with an outlet of the filter, and an outlet of the third one-way valve is communicated with the port A; an inlet of the fourth one-way valve is communicated with an outlet of the filter, and an outlet of the fourth one-way valve is communicated with the port B. According to the pipeline filtering device, the one-way valve is matched with the filter to work, so that media flowing through the filter are in the same direction no matter the media flow into the filter from the A port or the B port, and filtered redundant substances are always located on the inlet side of the filter; the problem that redundant materials flow back and forth in the pipeline in the gas making and discharging process of the vaporizer of the liquid rocket engine test bed is effectively solved.
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Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a pipeline filtering device in the field of aerospace liquid rocket engine test benches. Background Art

[0002] During the liquid nitrogen gasification process of the liquid rocket engine test bench, the liquid nitrogen is pressurized by the booster pump and then transported to the vaporizer for vaporization, and then the vaporized nitrogen is transported to the high-pressure gas cylinder for storage. A filter is installed at the entrance of the high-pressure gas cylinder to filter the excess material brought from the liquid nitrogen, booster pump, vaporizer, pipeline and other components. After the gasification process is completed, the high-pressure nitrogen in the vaporizer must be discharged. During the exhaust process of opening the exhaust valve, as the pressure in the vaporizer decreases, the gas in the pipeline between the vaporizer and the gas cylinder flows back to the vaporizer, causing the excess material in the filter to return to the vaporizer, causing secondary pollution to the vaporizer and the pipeline; when the gasification is started again, the excess material is blown to the filter again. After some fine excess material passes through the filter, it causes pollution to the downstream. The filter repeatedly acts in both directions, and the filter screen is easily damaged. Therefore, a pipeline filter is needed to effectively solve the problem of excess material flowing back and forth in the pipeline. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a pipeline filtering device, which is provided with port A and port B; comprises a filter, a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve;

[0004] The inlet of the first one-way valve is connected to the port B, and the outlet of the first one-way valve is connected to the inlet of the filter;

[0005] The inlet of the second one-way valve is connected to the port A, and the outlet of the second one-way valve is connected to the inlet of the filter;

[0006] The inlet of the third one-way valve is connected to the outlet of the filter, and the outlet of the third one-way valve is connected to the port A;

[0007] The inlet of the fourth one-way valve is connected to the outlet of the filter, and the outlet of the fourth one-way valve is connected to the B port.

[0008] In some other embodiments, the outlet of the first one-way valve is connected to the inlet of the filter through a fifth pipeline, and the outlet of the second one-way valve is connected to the inlet of the filter through a sixth pipeline;

[0009] Furthermore, it also includes a ninth pipeline, the ninth pipeline is connected to the inlet of the filter, and the fifth pipeline and the sixth pipeline are connected to the ninth pipeline;

[0010] Preferably, the fifth pipeline, the sixth pipeline and the ninth pipeline are connected via a tee pipe.

[0011] In some other embodiments, the inlet of the third one-way valve is communicated with the outlet of the filter through an eighth pipeline, and the inlet of the fourth one-way valve is communicated with the outlet of the filter through a seventh pipeline;

[0012] Furthermore, a tenth pipeline is further included. The tenth pipeline is connected to the outlet of the filter, and the seventh pipeline and the eighth pipeline are communicated with the tenth pipeline;

[0013] Preferably, the seventh pipeline, the eighth pipeline and the tenth pipeline are connected through a tee.

[0014] In some other embodiments, the inlet of the first one-way valve is communicated with port B through a first pipeline, and the outlet of the fourth one-way valve is communicated with port B through a fourth pipeline;

[0015] Furthermore, an eleventh pipeline is further included. The first pipeline and the fourth pipeline are communicated with the eleventh pipeline, and port B is located on the eleventh pipeline;

[0016] Preferably, the first pipeline, the fourth pipeline and the eleventh pipeline are connected through a tee.

[0017] In some other embodiments, the inlet of the second one-way valve is communicated with port A through a second pipeline, and the outlet of the third one-way valve is communicated with port A through a third pipeline.

[0018] Furthermore, a twelfth pipeline is further included. The second pipeline and the third pipeline are communicated with the twelfth pipeline, and port A is located on the twelfth pipeline.

[0019] Preferably, the second pipeline, the third pipeline and the twelfth pipeline are connected through a tee.

[0020] The pipeline filtering device of the present utility model is simple and reliable. By using the cooperation of one-way valves and filters, no matter whether the medium flows in from port A or port B, the medium flowing through the filter is in the same direction, so that the redundant substances are always on the inlet side of the filter. This solution effectively solves the problem of the redundant substances flowing back and forth in the pipeline during the gas production and discharge processes of the vaporizer on the liquid rocket engine test stand, improves the cleanliness of the system, and extends the service life of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below.

[0022] Figure 1 It is a schematic diagram of the pipeline filtering device of Embodiment 1 of the present utility model.

[0023] Figure 2 It is a schematic diagram of the pipeline filtering device of Embodiment 2 of the present utility model.

[0024] Description of the markings in the figure: 1 - Filter; 2 - First check valve; 3 - Second check valve; 4 - Third check valve; 5 - Fourth check valve; 6 - Port A; 7 - Port B; 8 - First pipeline; 9 - Second pipeline; 10 - Third pipeline; 11 - Fourth pipeline; 12 - Fifth pipeline; 13 - Sixth pipeline; 14 - Seventh pipeline; 15 - Eighth pipeline; 16 - Ninth pipeline; 17 - Tenth pipeline; 18 - Eleventh pipeline; 19 - Twelfth pipeline. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0028] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0029] Embodiment 1

[0030] The pipeline filtering device of this embodiment is provided with an A port and a B port; it includes a filter, a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve; the inlet of the first one-way valve is connected to the B port, and the outlet of the first one-way valve is connected to the inlet of the filter; the inlet of the second one-way valve is connected to the A port, and the outlet of the second one-way valve is connected to the inlet of the filter; the inlet of the third one-way valve is connected to the outlet of the filter, and the outlet of the third one-way valve is connected to the A port; the inlet of the fourth one-way valve is connected to the outlet of the filter, and the outlet of the fourth one-way valve is connected to the B port. This pipeline filtering device uses the one-way valve to cooperate with the filter to work, so that no matter the medium flows in from the A port or the B port, the medium flowing through the filter is in the same direction, and the redundant substances filtered are always on the inlet side of the filter.

[0031] Specifically, as Figure 1 shown in the pipeline filtering device, it includes a filter 1, a first one-way valve 2, a second one-way valve 3, a third one-way valve 4, a fourth one-way valve 5, an A port 6 and a B port 7.

[0032] The inlet of the first one-way valve 2 is connected to the B port 7 through a first pipeline 8, and the outlet of the first one-way valve 2 is connected to the inlet of the filter 1 through a fifth pipeline 12.

[0033] The inlet of the second one-way valve 3 is connected to the A port 6 through a second pipeline 9, and the outlet of the second one-way valve 3 is connected to the inlet of the filter 1 through a sixth pipeline 13.

[0034] The inlet of the third one-way valve 4 is connected to the outlet of the filter 1 through an eighth pipeline 15, and the outlet of the third one-way valve 4 is connected to the A port 6 through a third pipeline 10.

[0035] The inlet of the fourth one-way valve 5 is connected to the outlet of the filter 1 through a seventh pipeline 14, and the outlet of the fourth one-way valve 5 is connected to the B port 7 through a fourth pipeline 11.

[0036] The flow direction of the medium in the pipeline filtering device is as follows:

[0037] When the medium enters from the A port 6, under the action of the medium pressure, the second one-way valve 3 is opened against the spring force, and the third one-way valve 4 is in a closed state under the dual action of the medium pressure and the spring force. The medium flows from the second one-way valve 3 to the inlet of the filter 1. At this time, the first one-way valve 2 is still in a closed state under the combined action of the medium pressure and the spring force. When the medium flows through the filter 1 to reach the outlet of the filter 1, the medium pressure overcomes the spring pressure of the fourth one-way valve 5 and is opened. Due to the fact that the medium pressure at the inlet of the third one-way valve 4 is less than the medium pressure at the outlet, plus the dual action of the spring force, the third one-way valve 4 is still in a closed state. At this time, the medium flows to the B port 7, completing the circulation from the A port 6 to the B port 7.

[0038] When the medium enters from port B7, under the action of the medium pressure, the first one-way valve 2 is opened against the spring force, and the fourth one-way valve 5 is in the closed state under the dual action of the medium pressure and the spring force. The medium flows from the first one-way valve 2 to the inlet of the filter 1. At this time, the second one-way valve 3 is still in the closed state under the combined action of the medium pressure and the spring force. When the medium flows through the filter 1 to the outlet of the filter 1, the medium pressure overcomes the spring pressure of the third one-way valve 4 and is opened. Due to the fact that the inlet medium pressure of the fourth one-way valve 5 is less than the outlet medium pressure, plus the dual action of the spring force, the fourth one-way valve 5 remains in the closed state. At this time, the medium flows to port A6, completing the circulation from port B7 to port A6.

[0039] This pipeline filtering device uses one-way valves to cooperate with the filter, so that no matter whether the medium flows in from port A or port B, the medium flowing through the filter is in the same direction, and the redundant substances filtered are always on the inlet side of the filter.

[0040] Embodiment 2

[0041] As Figure 2 shown in the pipeline filtering device of this embodiment, the difference from the pipeline filtering device of Embodiment 1 is that: it further includes a ninth pipeline 16, a tenth pipeline 17, an eleventh pipeline 18, and a twelfth pipeline 19; the ninth pipeline 16 is connected to the inlet of the filter 1, and the fifth pipeline 12 and the sixth pipeline 13 communicate with the ninth pipeline 16; the tenth pipeline 17 is connected to the outlet of the filter 1, and the seventh pipeline 14 and the eighth pipeline 15 communicate with the tenth pipeline 17; the first pipeline 8 and the fourth pipeline 11 communicate with the eleventh pipeline 18, and port B7 is located on the eleventh pipeline 18; the second pipeline 9 and the third pipeline 10 communicate with the twelfth pipeline 19, and port A6 is located on the twelfth pipeline 19. The other structures of the pipeline filtering device in this embodiment are the same as those in Embodiment 1.

[0042] In some other embodiments, the fifth pipeline 12, the sixth pipeline 13 and the ninth pipeline 16 are connected through a tee, the seventh pipeline 14, the eighth pipeline 15 and the tenth pipeline 17 are connected through a tee, the first pipeline 8, the fourth pipeline 11 and the eleventh pipeline 18 are connected through a tee, and the second pipeline 9, the third pipeline 10 and the twelfth pipeline 19 are connected through a tee.

[0043] The flow direction of the medium in the pipeline filtering device is as follows:

[0044] When the medium enters from port A 6, under the action of the medium pressure, the second one-way valve 3 is opened against the spring force, and the third one-way valve 4 is in the closed state under the combined action of the medium pressure and the spring force. The medium flows from the second one-way valve 3 to the inlet of the filter 1. At this time, the first one-way valve 2 is still in the closed state under the combined action of the medium pressure and the spring force. When the medium flows through the filter 1 to reach the outlet of the filter 1, the medium pressure opens against the spring pressure of the fourth one-way valve 5. Due to the fact that the inlet medium pressure of the third one-way valve 4 is less than the outlet medium pressure, plus the combined action of the spring force, the third one-way valve 4 remains in the closed state. At this time, the medium flows to port B 7, completing the flow from port A 6 to port B 7.

[0045] When the medium enters from port B 7, under the action of the medium pressure, the first one-way valve 2 is opened against the spring force, and the fourth one-way valve 5 is in the closed state under the combined action of the medium pressure and the spring force. The medium flows from the first one-way valve 2 to the inlet of the filter 1. At this time, the second one-way valve 3 is still in the closed state under the combined action of the medium pressure and the spring force. When the medium flows through the filter 1 to reach the outlet of the filter 1, the medium pressure opens against the spring pressure of the third one-way valve 4. Due to the fact that the inlet medium pressure of the fourth one-way valve 5 is less than the outlet medium pressure, plus the combined action of the spring force, the fourth one-way valve 5 remains in the closed state. At this time, the medium flows to port A 6, completing the conduction from port B 7 to port A 6.

[0046] This pipeline filtering device utilizes the cooperation of one-way valves and filters, enabling the medium to flow in the same direction through the filter whether it enters from port A or port B. This makes the redundant substances always on the inlet side of the filter. This solution effectively solves the problem of the redundant substances flowing back and forth in the pipeline during the gas production and emission processes of the vaporizer in the liquid rocket engine test stand, improves the cleanliness of the system, and extends the service life of the filter screen.

[0047] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A pipeline filtering device, provided with port A and port B; characterized in that: It includes a filter, a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve; The inlet of the first one-way valve is connected to the port B, and the outlet of the first one-way valve is connected to the inlet of the filter; The inlet of the second one-way valve is connected to the port A, and the outlet of the second one-way valve is connected to the inlet of the filter; The inlet of the third one-way valve is connected to the outlet of the filter, and the outlet of the third one-way valve is connected to the port A; The inlet of the fourth one-way valve is connected to the outlet of the filter, and the outlet of the fourth one-way valve is connected to the B port.

2. The pipeline filtering device according to claim 1, characterized in that: The outlet of the first one-way valve is communicated with the inlet of the filter through a fifth pipeline, and the outlet of the second one-way valve is communicated with the inlet of the filter through a sixth pipeline.

3. The pipeline filtering device according to claim 2, characterized in that: It also includes a ninth pipeline, which is connected to the inlet of the filter, and the fifth pipeline and the sixth pipeline are connected to the ninth pipeline.

4. The pipeline filtering device according to claim 3, characterized in that: The fifth pipeline, the sixth pipeline and the ninth pipeline are connected through a three-way pipe.

5. The pipeline filtering device according to claim 1, characterized in that: The inlet of the third one-way valve is connected to the outlet of the filter through an eighth pipeline, and the inlet of the fourth one-way valve is connected to the outlet of the filter through a seventh pipeline.

6. The pipeline filtering device according to claim 5, characterized in that: It also includes a tenth pipeline, which is connected to the outlet of the filter, and the seventh pipeline and the eighth pipeline are connected to the tenth pipeline.

7. The pipeline filtering device according to claim 6, characterized in that: The seventh pipeline, the eighth pipeline and the tenth pipeline are connected through a three-way pipe.

8. The pipeline filtering device according to claim 1, characterized in that: The inlet of the first one-way valve is connected to the B port through a first pipeline, and the outlet of the fourth one-way valve is connected to the B port through a fourth pipeline.

9. The pipeline filtering device according to claim 8, characterized in that: It also includes an eleventh pipeline, the first pipeline and the fourth pipeline are connected to the eleventh pipeline, and the B port is located on the eleventh pipeline.

10. The pipeline filtering device according to claim 1, characterized in that: The inlet of the second one-way valve is communicated with the port A through a second pipeline, and the outlet of the third one-way valve is communicated with the port A through a third pipeline.