A cryogenic filter

Abstract

The utility model relates to the field of spaceflight test launch support, more specifically to a low temperature filter, including liquid inlet pipe, the fixedly connected with filter pipe on liquid inlet pipe, the fixedly connected with liquid discharge pipe on filter pipe, filter pipe is obliquely arranged, is provided with filter core in filter pipe, is provided with the oblique opening that inclines on filter core, is provided with a plurality of leak holes on filter core one side, the fixedly connected with baffle on filter core upper end, the fixedly connected with spring in filter pipe top wall, the fixedly connected with a plurality of sealing sheets on filter core outer wall, the fixedly connected with the baffle cover on filter core lower extreme, is provided with a plurality of mounting holes on baffle cover, filter pipe lower extreme is provided with a plurality of mounting holes, can automatically push out filter core when dismounting filter core, need not to manually pull out filter core.

Description

Technical Field

[0001] This utility model relates to the field of aerospace test and launch support, and more specifically to a cryogenic filter. Background Technology

[0002] This patented technology belongs to the field of aerospace test and launch support. To facilitate extensive research in cryogenic fueling, and considering that new-generation cryogenic liquid rockets are gradually becoming the main type of rocket for space launches in China, while existing systems do not meet personnel training requirements, we have developed a cryogenic fueling simulation training system. This training system can simulate the liquid oxygen and liquid nitrogen fueling functions of cryogenic rockets. It can perform liquid oxygen fueling, liquid nitrogen fueling preparation, pipeline and tank pre-cooling, high-flow-rate fueling, hot oxygen venting, supercooled replenishment, pre-launch replenishment, and venting / detachment according to the actual launch process. The equipment in the training system includes fueling / venting connectors, exhaust connectors, vacuum pneumatic shut-off valves, vacuum pneumatic regulating valves, and cryogenic filters.

[0003] The low-temperature Y-type filter is suitable for operating conditions with a medium temperature of -196℃ to +80℃. It is used to remove solid impurities in a timely manner and prevent them from accumulating in the system and forming scale that clogs equipment and pipelines. When cleaning and replacing the filter element of a conventional low-temperature filter, the staff needs to manually pull out the filter element after removing the bolts. Although the staff wear special gloves when replacing the filter element, there is still a risk of frostbite due to improper operation. Utility Model Content

[0004] This invention provides a low-temperature filter that can automatically push out the filter element when disassembling it, eliminating the need for manual removal.

[0005] A low-temperature filter includes an inlet pipe, a filter tube fixedly connected to the inlet pipe, a drain pipe fixedly connected to the filter tube, the filter tube being inclined, a filter element being disposed inside the filter tube, the filter element having an inclined opening, multiple leakage holes being disposed on one side of the filter element, a baffle plate fixedly connected to the upper end of the filter element, and a spring fixedly connected to the top wall of the filter tube.

[0006] Multiple sealing plates are fixedly connected to the outer wall of the filter element.

[0007] A cover is fixedly connected to the lower end of the filter element, and multiple mounting holes are opened on the cover. Multiple mounting holes are also opened at the lower end of the filter tube.

[0008] A pull handle is fixedly connected to the lower end of the cover.

[0009] Both the inlet and outlet pipes are fixedly connected with sealing gaskets.

[0010] Flanges are installed at the ends of both the inlet and outlet pipes.

[0011] The sealing gasket is made of polytetrafluoroethylene.

[0012] The inlet pipe, outlet pipe, and filter pipe are all made of stainless steel.

[0013] The diameter of the filter tube is larger than that of the inlet and outlet tubes.

[0014] Multiple sealing plates are interference-fitted with the inner wall of the filter tube. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of a low-temperature filter;

[0017] Figure 3 This is a cross-sectional view of the structure of a cryogenic filter;

[0018] Figure 4 This is a schematic diagram of the filter element. Detailed Implementation

[0019] A cryogenic filter includes an inlet pipe 101, a filter pipe 104 welded to the inlet pipe 101, a drain pipe 102 welded to the filter pipe 104, the filter pipe 104 being inclined, a filter element 203 disposed inside the filter pipe 104, the filter element 203 having an inclined opening 204, a plurality of leakage holes 205 on one side of the filter element 204, a baffle 206 welded to the upper end of the filter element 203, and a spring 105 welded to the top wall of the filter pipe 104.

[0020] See Figure 3-4 ,

[0021] When using a cryogenic filter, the operator first connects the inlet pipe 101 and the outlet pipe 102 to the two ends of the pipeline respectively. The liquid enters the filter tube 104 through the inlet pipe 101, and then enters the filter element 203 through the inclined opening 204. Since the filter element 203 has multiple leakage holes 205 on one side, it can filter the liquid. The filtered liquid is discharged after entering the outlet pipe 102 through the multiple leakage holes 205, and impurities are isolated in the filter element 203.

[0022] When installing the filter element, the staff manually inserts the filter element 203 into the filter tube 104, so that the inclined opening 204 faces the liquid inlet pipe 101, thereby facilitating the entry of liquid into the filter element 203 to achieve the liquid filtration function. When the filter element 203 is inserted into the filter tube 104, the baffle 206 at the top of the filter element 203 contacts the spring 105 on the top wall of the filter tube 104. As the filter element 203 moves, the spring 105 is compressed by the force, fixing the bottom of the filter element 203 to the bottom of the filter tube 104 through the flange. After the filter element 203 is fixed, the spring 105 is in a stressed state.

[0023] When the filter element 203 needs to be disassembled and cleaned, the staff removes the bolts on the flange. After the bolts are removed, the filter element 203 is no longer restricted and can be automatically pushed out by the elasticity of the spring 105. There is no need for the staff to manually pull out the filter element 203. Compared with the conventional method of replacing filter elements, this design can save the staff's manual operation time, making filter element replacement faster and more convenient.

[0024] Although staff wear special gloves when replacing filter element 203, there is still a risk of frostbite due to improper operation. The automatic pop-out mechanism of filter element 203, which uses a receiving tray to catch it, avoids the hands from getting close to the filter tube 104 compared to the conventional manual removal of filter elements. This prevents the dripping liquid nitrogen from directly contacting the exposed skin of the hands or wrists, reducing the risk of skin damage.

[0025] Multiple sealing pieces 207 are bonded to the outer wall of filter element 203.

[0026] See Figure 3-4 ,

[0027] Multiple sealing pieces 207 serve to seal the filter element 203 and the filter tube 104, preventing liquid from leaking out through gaps.

[0028] A cover 201 is welded to the lower end of the filter element 204. The cover 201 has multiple mounting holes. The filter tube 104 also has multiple mounting holes at its lower end.

[0029] See Figure 4 ,

[0030] When the filter element 204 is inserted into the filter tube 104, the cover 201 can block the opening at the bottom of the filter tube 104 to protect the filter element 204. By inserting bolts into the multiple mounting holes of the cover 201 that are aligned with the filter tube 104, the filter element 204 can be fixed inside the filter tube 104.

[0031] A pull handle 202 is fixedly connected to the lower end of the cover 201 by bolts.

[0032] See Figure 4 ,

[0033] The pull handle 202 facilitates manual operation of the filter element 204 during installation. The operator inserts the filter element 204 into the filter tube 104 by holding the pull handle 202 to install the filter element 204. Holding the pull handle 202 with the hand can prevent the filter element 204 from being popped out by the spring 105 during installation.

[0034] Both the inlet pipe 101 and the outlet pipe 102 are fitted with sealing gaskets 103.

[0035] See Figure 2 ,

[0036] The sealing gasket 103 serves to seal the liquid inlet pipe 101 and the liquid outlet pipe 102 with the liquid pipeline, preventing liquid leakage.

[0037] Flanges are provided at the ends of both the inlet pipe 101 and the outlet pipe 102.

[0038] See Figure 1 ,

[0039] The cryogenic filter is fixed to the pipe by inserting bolts.

[0040] The sealing gasket 103 is made of polytetrafluoroethylene.

[0041] See Figure 2 ,

[0042] Polytetrafluoroethylene (PTFE) has good reliability and stability, making it suitable for manufacturing gaskets 103 and improving sealing performance.

[0043] The inlet pipe 101, the outlet pipe 102, and the filter pipe 104 are all made of stainless steel.

[0044] See Figure 1 ,

[0045] The stainless steel inlet pipe 101, outlet pipe 102, and filter pipe 104 are easy to weld and have rust-proof and corrosion-resistant properties, making them suitable for manufacturing cryogenic filters.

[0046] The diameter of the filter tube 104 is larger than that of the inlet tube 101 and the outlet tube 102.

[0047] See Figure 3 ,

[0048] The diameter of the filter tube 104 ensures that all the liquid discharged from the inlet pipe 101 enters the filter element 203, thereby achieving the effect of comprehensive filtration of the liquid.

[0049] Multiple sealing plates 207 are interference-fitted with the inner wall of the filter tube 104.

[0050] See Figure 3 ,

[0051] When the filter element 203 is inserted into the filter tube 104, multiple sealing pieces 207 come into contact with the inner wall of the filter tube 104 and deform. The sealing pieces 207 deform under force, thereby ensuring the sealing effect.

Claims

1. A low-temperature filter, characterized in that: It includes an inlet pipe, a filter pipe fixedly connected to the inlet pipe, a drain pipe fixedly connected to the filter pipe, the filter pipe is inclined, a filter element is installed inside the filter pipe, the filter element has an inclined opening, multiple leakage holes are opened on one side of the filter element, a baffle is fixedly connected to the upper end of the filter element, and a spring is fixedly connected to the top wall of the filter pipe.

2. A low-temperature filter according to claim 1, characterized in that: Multiple sealing plates are fixedly connected to the outer wall of the filter element.

3. A low-temperature filter according to claim 2, characterized in that: A cover is fixedly connected to the lower end of the filter element, and multiple mounting holes are opened on the cover. Multiple mounting holes are also opened at the lower end of the filter tube.

4. A low-temperature filter according to claim 3, characterized in that: A pull handle is fixedly connected to the lower end of the cover.

5. A low-temperature filter according to claim 1, characterized in that: Both the inlet and outlet pipes are fixedly connected with sealing gaskets.

6. A low-temperature filter according to claim 5, characterized in that: Flanges are installed at the ends of both the inlet and outlet pipes.

7. A low-temperature filter according to claim 6, characterized in that: The sealing gasket is made of polytetrafluoroethylene.

8. A low-temperature filter according to claim 1, characterized in that: The inlet pipe, outlet pipe, and filter pipe are all made of stainless steel.

9. A low-temperature filter according to claim 1, characterized in that: The diameter of the filter tube is larger than that of the inlet and outlet tubes.

10. A low-temperature filter according to claim 1, characterized in that: Multiple sealing plates are interference-fitted with the inner wall of the filter tube.

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