Grinding device and air conditioner liquid pipe shielding cabin-penetrating flange

Abstract

The invention relates to the technical field of waveguide tubes and machining of the waveguide tubes, in particular to a grinding device and an air conditioner liquid tube shielding cabin-penetrating flange, the grinding device can achieve precise grinding machining of the inner wall of the tube aiming at the waveguide tubes with the large length-width (diameter) proportion, and different grinding liquid mesh numbers can be rapidly switched in one-time machining activity; multi-stage rough machining, semi-finish machining and finish machining can be achieved, certain function expansibility is achieved, the equipment is simple in structure, low in cost and easy to maintain, the electromagnetic shielding structure of the air conditioner liquid pipe shielding cabin penetrating flange does not have redundant parts, and the requirement for the foundation installation structure and the construction process is combined. The shielding pad is integrated in the simplest and controllable mode, the electromagnetic shielding effect between the guide pipe and the cabin wall hole is achieved, and good compatibility is achieved for different cabin wall hole diameters and different assembly gaps.

Description

Technical Field

[0001] This invention relates to the field of waveguides and their processing technology, and in particular to a grinding device and a shielding flange for air conditioning liquid pipes. Background Technology

[0002] When installing split-type air conditioners in containerized shelters that require electromagnetic shielding, waveguides must be used to shield the air conditioning pipes that pass through the shelter walls. In theory, waveguides can be installed directly through the walls, but in actual construction, the diameter of the holes drilled in the shelter walls is usually larger than the diameter of the waveguides. The gap between the waveguides and the shelter walls is usually filled with sealant and then covered with an annular decorative cover. Therefore, when electromagnetic waves pass through the inside of the waveguides, they can be effectively blocked from propagating. However, there is a risk of escape in the gap between the shelter walls and the waveguides.

[0003] Another factor that significantly affects the performance of waveguides is the surface finish of the inner wall. Therefore, the inner wall of waveguides is usually machined using high-performance lathes. This is especially true for waveguides used for air conditioning ducts that pass through walls, which have larger diameters and longer lengths and require large-scale, high-precision lathes, resulting in higher costs.

[0004] In summary, there is a need to develop a high-performance electromagnetic shielded waveguide for air conditioning pipes passing through walls. While maintaining the high shielding performance of the waveguide, it is also necessary to control its production cost and processing efficiency. To this end, a grinding device and an air conditioning liquid pipe shielding flange for passing through the cabin are proposed. Summary of the Invention

[0005] In view of the performance loss problem caused by the construction method of the high-performance electromagnetic shielded waveguide for air conditioning ducts passing through the cabin in the above or existing technologies, and the high processing cost of such large-size high-performance waveguides, this invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a grinding device and an air conditioning liquid pipe shielding through-chamber flange.

[0007] To address the high processing cost of large-size, high-performance waveguides, this invention provides a grinding device, including a waveguide and: a guide sleeve, which is sealed and divided into two sections to store two different mesh sizes of grinding fluid; each section has a grinding cloth sleeve fitted onto its outer wall, with both ends of the grinding cloth sleeve tightly bound for grinding the inner wall of the waveguide; and through holes on both sides of the partition within the tube for conveying the grinding fluid to be absorbed by the grinding cloth sleeve; a hollow piston rod, the head end of which is sealed and inserted into the guide sleeve, allowing only unidirectional flow of the grinding fluid within it; and a gantry linear module, which has two sets of sliding tables rotatably connected to both ends of the guide sleeve, and the tail ends of the two hollow piston rods rotatably connected to both ends of the base of the gantry linear module; the outer wall of the waveguide is fixedly clamped to the gantry of the gantry linear module; a cylinder is fixedly connected between the two sets of sliding tables, and the piston rod of the cylinder passes through the sliding table and is fixedly connected to one end of the base of the gantry linear module.

[0008] The beneficial effects of the grinding device of the present invention are as follows: The grinding device of the present invention can achieve precision grinding of the inner wall of waveguides with a large length-to-width (diameter) ratio, and can quickly switch different grinding fluid mesh sizes in one processing activity. It can achieve multi-stage roughing, semi-finishing and finishing, has a certain degree of functional expandability, and the equipment has a simple structure, low cost and easy maintenance.

[0009] In a preferred embodiment of the grinding device of the present invention, the waveguide, the guide sleeve, the hollow piston rod, and the cylinder are all parallel to the direction of movement of the slide table. One end of the guide sleeve is flanged and connected to a cylindrical pulley, and a short pipe is rotatably connected inside the pulley. A bracket is provided between the short pipe and the slide table. The short pipe is not in contact with the hollow piston rod. The tail end of the hollow piston rod passes through the short pipe and is rotatably connected to a bracket, and the bracket is fixedly connected to the base of the gantry linear module.

[0010] In a preferred embodiment of the grinding device of the present invention, the slide table is composed of a metal square tube and a slider. A motor is also installed on the square tube of the slide table. The output shaft of the motor is driven by a synchronous belt through a pulley. The square tube of the slide table is hollowed out in the area corresponding to the synchronous belt.

[0011] In a preferred embodiment of the grinding device of the present invention, a one-way valve is installed at the head end of the hollow piston rod. The diameter of the one-way valve is larger than that of the hollow piston rod and it is slidably sleeved with the guide sleeve as a piston. The allowable flow direction of the one-way valve is from the tail end of the hollow piston to the head end. A rotary joint is installed at the tail end of the hollow piston rod.

[0012] As a preferred embodiment of the grinding device of the present invention, deep groove ball bearings and linear bearings are respectively used between the two sets of hollow piston rods and the second bracket, and the hollow piston rod equipped with the linear bearing is also clamped with a snap ring at the end of the linear bearing away from the rotary joint.

[0013] As a preferred embodiment of the grinding device of the present invention, the outer wall of the guide sleeve is provided with annular grooves corresponding to the partition inside the tube, as well as on both sides of the partition and at both ends of the main body.

[0014] As a preferred embodiment of the grinding device of the present invention, a sealing cup is fitted into the annular groove corresponding to the partition of the inner part of the guide sleeve. The edge of the sealing cup is sealed with the inner wall of the guide sleeve to prevent the grinding liquid of different mesh sizes on the two grinding cloth sleeves from mixing. In addition, clamps are provided in the remaining annular grooves on the outer wall of the guide sleeve to tighten the grinding cloth sleeves.

[0015] In a preferred embodiment of the grinding device of the present invention, the effective working length of the grinding cloth sleeve is greater than the length of the waveguide, and the length of the material guide sleeve is twice the length of the grinding cloth sleeve.

[0016] To address the aforementioned issue of performance loss in high-performance waveguides due to construction methods, this invention proposes an air conditioning liquid pipe shielding through-chamber flange, comprising a gasket sleeved on the waveguide, with a gap between the gasket and the waveguide, and flange gaskets movably sleeved at both ends of the waveguide located on the gasket, with a shielding gasket attached to the side of the flange gasket near the gasket, and the annular inner edge of the shielding gasket being pressed and extended into the gap between the gasket and the waveguide.

[0017] As a preferred embodiment of the air conditioning liquid pipe shielding through-chamber flange of the present invention, wherein: the shielding gasket is made of densely woven copper wire, the waveguide is connected to a nut one on the side of the two flange gaskets that are far apart from each other, and the two ends of the waveguide are also threadedly connected to a nut two, and a claw-shaped anti-detachment component is tightened between the nut two and the end of the waveguide.

[0018] The beneficial effects of the air conditioning liquid pipe shielding through-cabin flange of the present invention are as follows: The electromagnetic shielding structure of the present invention has no redundant parts. Combining the basic installation structure and construction process requirements, the shielding gasket is integrated in the simplest and most controllable way, realizing the electromagnetic shielding effect between the duct and the cabin wall hole, and has good compatibility with different cabin wall hole diameters and different assembly gaps. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the air conditioning liquid pipe shielding through-chamber flange.

[0021] Figure 2 for Figure 1 A structural sectional view.

[0022] Figure 3 This is a schematic diagram of the grinding device.

[0023] Figure 4 for Figure 3 A structural diagram from another perspective.

[0024] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0025] Figure 6 for Figure 4 The structural cross-sectional view at point A in the middle.

[0026] Figure 7 This is a cross-sectional view of the assembly structure of the guide sleeve and the hollow piston rod.

[0027] Figure 8 for Figure 7 Exploded view of the structure.

[0028] Figure 9 for Figure 7 Enlarged view of the structure at point B.

[0029] In the diagram: 100, guide sleeve; 1001, through hole; 1002, annular groove; 101, grinding cloth sleeve; 102, hollow piston rod; 1021, one-way valve; 103, pulley; 104, short pipe; 105, rotary joint; 106, sealing cup; 107, clamp; 108, snap ring; 200, gantry linear module; 201, slide table; 2011, bracket one; 202, cylinder; 203, motor; 204, synchronous belt; 205, bracket two; 300, waveguide; 301, gasket; 302, flange gasket; 303, shielding gasket; 304, nut one; 305, nut two; 306, anti-detachment component. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Example 1, referring to Figures 1-2This embodiment provides an air conditioning liquid pipe shielding through-chamber flange that can maintain a high electromagnetic shielding effect even when the opening size of the chamber wall is too large. It includes a waveguide 300 and a gasket 301 sleeved on the waveguide 300. There is a gap between the gasket 301 and the waveguide 300. Flange gaskets 302 are movably sleeved at both ends of the waveguide 300 located on the gasket 301. A shielding gasket 303 is attached to the side of the flange gasket 302 near the gasket 301. The inner edge of the shielding gasket 303 is pressed and extended into the gap between the gasket 301 and the waveguide 300.

[0032] Specifically, the shielding gasket 303 is made of densely woven copper wire. The waveguide 300 is connected to a nut 304 on the side of the two flange gaskets 302 that are far apart from each other. The two ends of the waveguide 300 are also threaded with a nut 305. A claw-shaped anti-detachment component 306 is tied between the nut 305 and the end of the waveguide 300.

[0033] To further explain its working principle in conjunction with the construction method: Due to the working characteristics of the waveguide 300, only electromagnetic waves passing through the waveguide 300 can achieve a shielding effect. Therefore, the two ends of the waveguide 300 do not require special sealing treatment. However, electromagnetic waves passing outside the waveguide 300, such as those passing through the gaps between the waveguide 300 and the bulkhead, pose an escape risk. Figure 1 and Figure 2 It can be seen that the two flange gaskets 302 are clamped on both sides of the bulkhead under the locking force of the nuts, and the shielding gasket 303 is pressed between the waveguide 300 and the bulkhead through the flange gaskets 302. The electromagnetic shielding between the opening in the bulkhead and the waveguide 300 is achieved by the shielding gasket 303.

[0034] During construction, the gasket 301 is first cut to a length matching the bulkhead thickness, with the length tolerance only slightly less than the bulkhead thickness. Both ends must not protrude beyond the bulkhead. The main function of the gasket 301 is to work with the flange gasket 302 to compress the shielding gasket 303. (Refer to...) Figure 2 In the magnified section, the shielding mesh, being made of copper wire braid, initially (where the aperture of the shielding pad 303 is required to be smaller than the outer diameter of the waveguide 300), utilizes the excellent extensibility of the braided structure. This allows the shielding pad 303, after being forcibly fitted onto the waveguide 300, to extend its edge into a ring shape, wrapping around the outer wall of the waveguide 300. Through the compression of the nut and flange gasket 302, this extended portion is forcibly inserted into the gap between the gasket tube 301 and the waveguide 300 (where the gap width between the waveguide 300 and the gasket tube 301 is required to be slightly smaller than the thickness of the shielding pad 303). In this way, the inner ring of the shielding pad 303 is in close contact with the waveguide 300, and the flat portion of the shielding pad 303 is tightly fitted to the bulkhead and covers the gap between the waveguide 300 and the bulkhead aperture. The electromagnetic shielding structure described above has no redundant parts. Combining the basic installation structure and construction process requirements, the shielding pad 303 is integrated in the simplest and most controllable way, achieving electromagnetic shielding between the conduit and the bulkhead hole, and has good compatibility with different bulkhead hole diameters and different assembly gaps.

[0035] Example 2, refer to Figures 1-9 This embodiment provides a grinding apparatus that can replace large-sized, expensive, high-performance lathe equipment to achieve precision grinding of the inner wall of the waveguide 300, which has a large length-to-width (diameter) ratio. (See reference...) Figure 1 and combined Figure 3 , Figure 8 and Figure 9 It includes a guide sleeve 100, which is sealed and divided into two sections to store two different mesh sizes of grinding fluid. Each section has a grinding cloth sleeve 101 fitted onto its outer wall, with both ends of the sleeve tightly secured for grinding the inner wall of the waveguide 300. Through holes 1001 are opened on both sides of the inner partition to transport the grinding fluid, which is absorbed by the grinding cloth sleeve 101. A hollow piston rod 102 has its head end sealed and inserted into the guide sleeve 100, allowing only unidirectional flow of the grinding fluid within it. Figure 3 and Figure 4 As shown, the gantry linear module 200 is provided with two sets of slides 201, which are rotatably connected to both ends of the guide sleeve 100 respectively. The tail ends of the two hollow piston rods 102 are rotatably connected to both ends of the base of the linear module respectively. The outer wall of the waveguide 300 is fixedly clamped to the gantry of the gantry linear module 200. A cylinder 202 is fixedly connected between the two sets of slides 201, and the piston rod of the cylinder 202 passes through the slide 201 and is fixedly connected to one end of the base of the gantry linear module 200.

[0036] The grinding device proposed in this invention mainly provides the function of quickly switching between different mesh sizes of grinding slurry with a simple and low-cost equipment structure, and the process and use of switching the mesh size of the grinding slurry are not affected by the grinding slurry used last time. The basic form of processing is: reference Figure 3 The waveguide 300 is fixed on the gantry of the gantry linear module 200. The guide sleeve 100 passes through the waveguide 300 and is ground by rotating inside the waveguide 300 through the guide sleeve and the grinding cloth sleeve 101 attached to it. The purpose of this grinding is to further improve the smoothness of the inner wall of the waveguide 300 and improve the electromagnetic shielding performance. The cutting amount will be very small, and the inner wall of the waveguide 300 needs to be semi-finished in advance. The advanced processing method is as follows: the cylinder 202 drives the slide 201 and the guide sleeve 100 to move along the axis of the waveguide 300, or... Figure 3Taking the perspective as an example, the left half of the guide sleeve 100 and the grinding cloth sleeve 101 on the left half of the guide sleeve 100 are used for grinding at this time. Assuming that the grinding cloth sleeve 101 is soaked in a low-mesh grinding liquid with a mesh number of "L", then the grinding is being performed (relatively). After the rough grinding is completed, fine grinding is required. The piston rod of the control cylinder 202 is retracted. Since the piston rod of the cylinder 202 is fixed to the left end of the base of the gantry linear module 200, the cylinder body of the cylinder 202 and the slide table 201 will move to the left. This causes the left section of the guide sleeve 100 to pass through the waveguide 300 and the right section of the guide sleeve 100 to enter the waveguide 300. The grinding cloth sleeve 101 on the right section of the guide sleeve 100 is soaked in a high-mesh grinding liquid with a mesh number of "H", which allows for fine grinding of the waveguide 300. Specific implementation methods for advanced processing forms: See reference Figure 9 Referring to other accompanying drawings, the waveguide 300 and hollow piston rod 102 are stationary relative to the gantry linear module 200. When the guide sleeve 100 moves relative to the waveguide 300, if the hollow piston rod 102 is pulled out relative to the guide sleeve 100, then the grinding fluid will be drawn into the guide sleeve 100 through the rotary joint 105. It is recommended that the grinding fluid container connected to the rotary joint 105 be open to the atmosphere. In this way, during the material extraction process, when air passes through the grinding cloth sleeve 101 soaked in grinding fluid, the airflow will be less than that through the hollow piston. It is more difficult for the rod 102 to draw the grinding fluid from the atmospheric pressure container, so the grinding fluid can be smoothly drawn into the guide sleeve 100. At the other end, when the hollow piston rod 102 is inserted into the guide sleeve 100, the grinding fluid drawn in the previous step will be forced through the through hole 1001 into the space between the grinding cloth sleeve 101 and the outer wall of the guide sleeve 100, squeezing out the old grinding fluid with metal grinding chips on the grinding cloth sleeve 101, thus cleaning the grinding cloth sleeve 101 while squeezing in new grinding fluid, preparing for the next grinding. An advanced processing method can be expanded by connecting containers of different mesh sizes of polishing slurry in parallel via hoses to an adapter, and controlling the inflow and outflow of slurry in each container via a solenoid valve. This expands the use of two mesh sizes of polishing slurry to the use of more than two mesh sizes in a single processing operation.

[0037] To achieve the above-mentioned objectives, the present invention also involves the following technical details: Firstly, the driving mechanism of the guide sleeve 100; Please refer to the structure. Figure 3 and Figure 4The waveguide 300, guide sleeve 100, hollow piston rod 102, and cylinder 202 are all parallel to the direction of movement of the slide table 201. One end of the guide sleeve 100 is flanged and connected to a cylindrical pulley 103, and a short pipe 104 is rotatably connected inside the pulley 103. A bracket 1011 is provided between the short pipe 104 and the slide table 201. The short pipe 104 is not in contact with the hollow piston rod 102. The tail end of the hollow piston rod 102 passes through the short pipe 104 and is rotatably connected to a bracket 205. The bracket 205 is fixedly connected to the base of the gantry linear module 200. A one-way valve 1021 is installed at the head end of the piston rod 102. The diameter of the one-way valve 1021 is larger than that of the hollow piston rod 102 and it slides in connection with the guide sleeve 100 as a piston. The allowable flow direction of the one-way valve 1021 is from the tail end of the hollow piston to the head end. A rotary joint 105 is installed at the tail end of the hollow piston rod 102. Deep groove ball bearings and linear bearings are used between the two sets of hollow piston rods 102 and the bracket 205, respectively. The hollow piston rod 102 equipped with the linear bearing also has a retaining ring 108 attached to the end of the linear bearing away from the rotary joint 105. (Reference) Figure 6 The slide table 201 is composed of a metal square tube and a slider. A motor 203 is also installed on the square tube of the slide table 201. The output shaft of the motor 203 is driven by a synchronous belt 204 to the pulley 103. The square tube of the slide table 201 is hollowed out in the area corresponding to the synchronous belt 204. refer to Figure 5 and Figure 6 The device uses ordinary thick-walled square tube segments as the main body of the slide table 201, which is responsible for supporting components such as the motor 203. The motor 203 drives the pulley 103 through the synchronous belt 204 to rotate the guide sleeve 100. There are two main points to note: First, the motor 203 needs to directly drive the guide sleeve 100 to rotate so that the torque of the motor 203 can be effectively transmitted to the guide sleeve 100. Second, the hollow piston rod 102 and the one-way valve 1021 at its head also need to rotate with the guide sleeve 100. This is to avoid the sealing ring on the one-way valve 1021 rotating and rubbing against the inner wall of the guide tube. Therefore, in addition to using bracket 1 2011 to rotate and support the guide sleeve 100, bracket 2 205 is also used to rotate and support the tail end of the hollow piston rod 102, and the rotary joint 105 is used for feeding.

[0038] Secondly, the feed sleeve 100 avoids cross-contamination of polishing fluids of different mesh sizes when it moves relative to the waveguide 300; The outer wall of the guide sleeve 100 is provided with annular grooves 1002 corresponding to the partitions inside the tube, as well as on both sides of the partitions and at both ends of the main body. A sealing cup 106 is fitted into the annular groove 1002 corresponding to the partitions inside the guide sleeve 100. The edge of the sealing cup 106 is sealed to the inner wall of the guide sleeve 100 to prevent cross-contamination of grinding liquids of different mesh sizes on the two grinding cloth sleeves 101. Clamps 107 are provided in the remaining annular grooves 1002 on the outer wall of the guide sleeve 100 to tighten the grinding cloth sleeves 101. The effective working length of the grinding cloth sleeve 101 is greater than the length of the waveguide 300, and the length of the guide sleeve 100 is twice the length of the grinding cloth sleeve 101. refer to Figure 9 The guide sleeve 100 is fitted with a sealing cup 106 between the two abrasive cloth sleeves 101. The sealing cup 106 is a consumable part. (See reference...) Figure 4 In the magnified portion, it can be seen that the sealing cup 106 blocks the opening of the waveguide 300 during the grinding process, preventing different mesh sizes of grinding fluid from the adjacent standby grinding cloth sleeve 101 from entering the waveguide 300. When the guide sleeve 100 moves to switch the grinding cloth sleeve 101, the sealing cup 106 will also slide through the inside of the waveguide 300 along with the guide sleeve 100, scraping out the grinding fluid remaining in the waveguide 300 from the previous step.

[0039] In summary, the grinding device of the present invention can achieve precision grinding of the inner wall of the waveguide 300 with a large length-to-width (diameter) ratio, and can quickly switch between different grinding fluid mesh sizes in one processing activity. It can achieve multi-stage roughing, semi-finishing and finishing, has certain functional expandability, and the equipment has a simple structure, low cost and easy maintenance.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A grinding apparatus, comprising a waveguide (300), characterized in that, Also includes: The guide sleeve (100) has a sealed partition inside the pipe that stores two types of grinding fluid of different mesh sizes. Each section is also fitted with a grinding cloth sleeve (101) on its outer wall. The two ends of the grinding cloth sleeve (101) are tied tightly for grinding the inner wall of the waveguide (300). The peripheral wall of the sleeve has through holes (1001) on both sides of the partition inside the pipe for conveying the grinding fluid to be absorbed by the grinding cloth sleeve (101). The hollow piston rod (102) has its head end sealed and inserted into the guide sleeve (100), allowing only the grinding fluid to flow in one direction; The gantry linear module (200) is provided with two sets of slides (201) which are rotatably connected to both ends of the guide sleeve (100). The tail ends of the two hollow piston rods (102) are rotatably connected to both ends of the base of the gantry linear module (200). The outer wall of the waveguide (300) is fixedly clamped to the gantry of the gantry linear module (200). A cylinder (202) is fixedly connected between the two sets of slides (201), and the piston rod of the cylinder (202) passes through the slide (201) and is fixedly connected to one end of the base of the gantry linear module (200).

2. The grinding apparatus as described in claim 1, characterized in that: The waveguide (300), the guide sleeve (100), the hollow piston rod (102), and the cylinder (202) are all parallel to the movement direction of the slide (201). One end of the guide sleeve (100) is flanged and connected to a cylindrical pulley (103), and a short pipe (104) is rotatably connected inside the pulley (103). A bracket (2011) is provided between the short pipe (104) and the slide (201). The short pipe (104) is not in contact with the hollow piston rod (102). The tail end of the hollow piston rod (102) passes through the short pipe (104) and is rotatably connected to a bracket (205). The bracket (205) is fixedly connected to the base of the gantry linear module (200).

3. The grinding apparatus as described in claim 2, characterized in that: The slide (201) is composed of a metal square tube and a slider. A motor (203) is also installed on the square tube of the slide (201). The output shaft of the motor (203) is driven by a synchronous belt (204) to the pulley (103). The square tube of the slide (201) is hollowed out in the area corresponding to the synchronous belt (204).

4. The grinding apparatus as described in claim 3, characterized in that: The hollow piston rod (102) is equipped with a one-way valve (1021) at its head end. The one-way valve (1021) has a diameter larger than the hollow piston rod (102) and is slidably sleeved with the guide sleeve (100) as a piston. The allowable flow direction of the one-way valve (1021) is from the tail end of the hollow piston to the head end. The tail end of the hollow piston rod (102) is equipped with a rotary joint (105).

5. The grinding apparatus as described in claim 4, characterized in that: Deep groove ball bearings and linear bearings are used between the two sets of hollow piston rods (102) and the second bracket (205), respectively. The hollow piston rod (102) equipped with the linear bearing is also attached to a snap ring (108) at the end of the linear bearing away from the rotary joint (105).

6. The grinding apparatus as described in claim 1, characterized in that: The outer wall of the guide sleeve (100) is provided with annular grooves (1002) corresponding to the partition inside the tube, as well as on both sides of the partition and at both ends of the body.

7. The grinding apparatus as described in claim 6, characterized in that: A sealing cup (106) is fitted into the annular groove (1002) at the partition of the guide sleeve (100). The edge of the sealing cup (106) is sealed with the inner wall of the guide sleeve (100) to prevent cross-contamination of grinding liquids of different mesh sizes on the two grinding cloth sleeves (101). In addition, clamps (107) are provided in the remaining annular grooves (1002) on the outer wall of the guide sleeve (100) to tighten the grinding cloth sleeves (101).

8. The grinding apparatus as described in claim 1, characterized in that: The effective working length of the abrasive cloth sleeve (101) is greater than the length of the waveguide (300), and the length of the material guide sleeve (100) is twice the length of the abrasive cloth sleeve (101).

9. A shielded through-chamber flange for air conditioning liquid lines, characterized in that, The grinding apparatus according to any one of claims 1 to 8 further includes a gasket (301) sleeved on the waveguide (300), with a gap between the gasket (301) and the waveguide (300), and flange gaskets (302) movably sleeved at both ends of the waveguide (300) located on the gasket (301). A shielding gasket (303) is attached to the side of the flange gasket (302) near the gasket (301), and the inner annular edge of the shielding gasket (303) is pressed and extended into the gap between the gasket (301) and the waveguide (300).

10. The air conditioning liquid pipe shielding through-chamber flange as described in claim 9, characterized in that: The shielding pad (303) is made of densely woven copper wire. The waveguide (300) is connected to a nut (304) on the side of the two flanges (302) that are far apart from each other. The two ends of the waveguide (300) are also threaded with a nut (305). A claw-shaped anti-detachment component (306) is tied between the nut (305) and the end of the waveguide (300).

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