Limiting drying filter

Abstract

The invention discloses a limiting dry filter, and relates to the technical field of dry filters, the limiting dry filter comprises a dry filter and a limiting mechanism, the limiting mechanism is arranged in a pipe opening of the dry filter, the limiting mechanism comprises a limiting ring and two sets of limiting assemblies, the limiting ring is axially installed in the pipe opening in a sliding mode, and the limiting assemblies are arranged in the limiting ring. The two limiting assemblies are symmetrically arranged on the limiting ring. The capillary tube is arranged in the tube opening and sleeved with the centering ring, the centering ring is evenly provided with multiple sets of centering assemblies, the centering assemblies fix the capillary tube to be coaxial with the tube opening, the bottom of the capillary tube makes contact with the limiting ring, the limiting assemblies make contact with the inner wall of the tube opening to limit the position of the limiting ring, and therefore the position of the capillary tube is limited. The sealing performance of a butt joint product is improved during butt joint replacement through annular limiting, sealant gathering can be effectively guaranteed, relative displacement of a capillary tube and a dry filter tube opening in the welding process is prevented, and the welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drying filters, and particularly to a limited drying filter. Background Art

[0002] A drying filter is a device used to remove moisture and impurities from gases or liquids. With the development of refrigeration technology, drying filters have been widely used in the refrigeration industry.

[0003] The welding of a drying filter and a capillary is a key technology in the repair and installation of a refrigeration system. The depth of insertion of the capillary into the drying filter is the key to the success of the repair and installation of the drying filter. If the insertion is too deep, it will touch the filter screen, forming a semi-blocked state, causing the refrigeration system to malfunction; if the insertion is insufficient, the solder will flow into the capillary, causing blockage inside the pipe and making the refrigeration system inoperable.

[0004] In the prior art, the horizontal dot limit of a drying filter is a way to accurately limit the horizontal position of the drying filter. It may consist of a series of dot-shaped limit structures or marks, which play a role similar to horizontal limit to ensure installation accuracy and prevent component displacement. However, the horizontal dot limit structure easily causes uneven distribution of sealant, and part of the sealant flows to the bottom. Moreover, when welding the drying filter and the capillary, when the solder has not completely solidified, the copper pipe must never be shaken or vibrated, otherwise cracks will occur in the welded part, resulting in leakage. Therefore, there is an urgent need for a limited drying filter. Summary of the Invention

[0005] In view of the above technical problems, a limited drying filter includes a drying filter and a limiting mechanism. A limiting mechanism is arranged inside the pipe orifice of the drying filter. The limiting mechanism includes a limiting ring and two groups of limiting components. The limiting ring is axially slidably installed inside the pipe orifice, and the two groups of limiting components are symmetrically arranged on the limiting ring. A capillary is arranged inside the pipe orifice. A centering ring is sleeved on the capillary, and multiple groups of centering components are evenly arranged on the centering ring. The centering components fix the capillary and the pipe orifice to be coaxial. The bottom of the capillary contacts the limiting ring, and the limiting components contact the inner wall of the pipe orifice to limit the position of the limiting ring, thereby limiting the position of the capillary.

[0006] Furthermore, an axial rail is arranged on the pipe orifice of the drying filter, a scale is arranged on the axial rail, and a pointer is slidably installed on the axial rail. The pointer and the limiting ring are magnetically matched. When the limiting ring moves, it drives the pointer to slide on the axial rail, and the position of the pointer reflects the position of the limiting ring, thereby determining the position of the bottom of the capillary.

[0007] Furthermore, the limiting component includes a limiting ball and a limiting spring. Column holes are symmetrically arranged on the limiting ring. A limiting rod is fixedly installed on the limiting ball, and the limiting rod is slidably installed on the column holes. The limiting spring is arranged between the limiting ring and the limiting ball, and the limiting spring is slidably installed on the limiting rod. Limiting grooves are symmetrically and evenly arranged axially inside the pipe orifice, and the limiting ball is in fitting contact with the limiting grooves. When an external force is applied to the limiting ring to adjust the position of the limiting ring inside the pipe orifice, when the limiting ring slides inside the pipe orifice, the limiting ball is subjected to the external force applied by the limiting grooves, and the fitting between the limiting ball and the limiting grooves is disconnected, and the limiting spring deforms. During this process, the limiting ring drives the pointer to slide on the shaft track until the limiting ring is adjusted to the target position, and the limiting ball and the limiting grooves continue to be in fitting contact, and the position of the limiting ring is the position of the bottom of the capillary tube.

[0008] Furthermore, the centering component includes a centering arc block and a slider. The bottom of the centering arc block is rotatably installed on the ear pin of the centering ring. A rod pin is arranged on the centering arc block. The slider is radially slidably installed on the chute of the centering ring. A connecting rod is rotatably connected between the rod pin of the centering arc block and the slider, and a centering spring is arranged between the slider and the centering ring. The centering arc block swings on the ear pin of the centering ring and drives the slider to slide on the chute through the connecting rod. During this process, the centering spring assists the centering arc block to return to the initial position.

[0009] Furthermore, a centering strip is arranged on the top of the centering arc block, and the centering strip is in contact and cooperation with the capillary tube. Multiple groups of centering components assist the centering strip to contact the capillary tube, so that the capillary tube and the centering ring are coaxial.

[0010] Furthermore, multiple groups of stud bolts are evenly arranged on the centering ring, and the stud bolts and the centering components are arranged alternately. An arc plate is rotatably installed inside the stud bolt through a thread. The bottom of the arc plate is in contact and cooperation with the outer wall of the end of the centering arc block. When the arc plate is rotated, under the action of the thread fit, the arc plate axially moves on the stud bolt, and the arc plate drives the centering arc block to swing on the ear pin, so as to fix capillary tubes of different sizes, and the centering spring assists the bottom of the arc plate to always be in contact with the outer wall of the end of the centering arc block.

[0011] Furthermore, the limiting ring is a rotating body, and a through hole penetrating the entire rotating body is arranged in the axial direction thereof, and the radius of the through hole is smaller than the outer diameter of the capillary tube. Since the bottom of the capillary tube contacts the limiting ring, the position of the capillary tube is restricted.

[0012] Furthermore, the outer diameter of the limiting ring and the outer diameter of the centering ring are both equal to the inner diameter of the pipe orifice of the drying filter. The limiting ring and the centering ring are both coaxial with the pipe orifice of the drying filter.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: (1) The present invention is provided with a limiting mechanism, which uses two sets of limiting components to limit the position of the limiting ring, and the limiting ring limits the position of the bottom of the capillary tube to ensure the normal operation of the refrigeration system. The annular limiting method can ensure that the sealant is in a better state during replacement docking, the sealing performance of the docking product is better, and the sealant will not flow below the limit, which can effectively ensure the gathering of the sealant and the better filling effect of the sealant; (2) The present invention is provided with a pointer, which uses the magnetic force cooperation between the pointer and the limiting ring to clarify the position of the limiting ring, so as to determine the position of the bottom of the capillary tube; (3) The present invention is provided with a centering mechanism, which uses the arc plate to drive multiple sets of centering components to fix the capillary tube, so that the capillary tube is coaxial with the centering ring and the pipe orifice of the drying filter. When welding the pipe orifice of the drying filter to the capillary tube, the two are in a relatively static state, preventing relative displacement between the capillary tube and the pipe orifice of the drying filter during the welding process, and cracks may occur in the welded part, resulting in leakage, and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention from the first perspective.

[0015] Figure 2 It is the front view of the present invention.

[0016] Figure 3 is Figure 2 the sectional view taken along the A-A direction in

[0017] Figure 4 is Figure 2 the sectional view taken along the B-B direction in

[0018] Figure 5 is Figure 3 the partial enlarged view of part C in

[0019] Figure 6 is Figure 5 the partial enlarged view of part D in

[0020] Figure 7 is Figure 5 the partial enlarged view of part E in

[0021] Figure 8 is Figure 4 the partial enlarged view of part F in

[0022] Figure 9 It is a schematic diagram of the centering mechanism fixing the capillary tube.

[0023] Attached drawing reference numerals: 11 - shaft rail; 12 - pointer; 13 - limit groove; 21 - limit ring; 22 - limit assembly; 211 - column hole; 221 - limit ball; 222 - limit rod; 223 - limit spring; 31 - centering ring; 32 - arc plate; 33 - stud; 34 - centering assembly; 35 - centering strip; 311 - ear pin; 312 - sliding groove; 341 - centering arc block; 342 - connecting rod; 343 - slider; 344 - centering spring; 3411 - rod pin. Detailed implementation mode

[0024] The technical solution of the present invention will be further described below in conjunction with the attached drawings and through specific implementation modes.

[0025] Example: As Figures 1 - 8 shown, a kind of limit drying filter includes a drying filter and a limit mechanism. A limit mechanism is arranged inside the pipe orifice of the drying filter. The limit mechanism includes a limit ring 21 and two groups of limit assemblies 22. The limit ring 21 is axially slidably installed inside the pipe orifice, and the two groups of limit assemblies 22 are symmetrically arranged on the limit ring 21; a capillary is arranged inside the pipe orifice, a centering ring 31 is sleeved on the capillary, and multiple groups of centering assemblies 34 are evenly arranged on the centering ring 31. The centering assemblies 34 fix the capillary and the pipe orifice to be coaxial. The bottom of the capillary contacts the limit ring 21, and the limit assemblies 22 contact the inner wall of the pipe orifice to limit the position of the limit ring 21, thereby limiting the position of the capillary.

[0026] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 8As shown in the figure, a shaft rail 11 is provided on the pipe orifice of the drying filter. A pointer 12 is slidably mounted on the shaft rail 11. Axially symmetrically and uniformly arranged limiting grooves 13 are provided inside the pipe orifice in the axial direction. A limiting mechanism is arranged inside the pipe orifice. The limiting mechanism includes a limiting ring 21 and a limiting component 22. The limiting ring 21 is a rotating body, and a through hole running through the entire rotating body is provided in the axial direction of the limiting ring. The radius of the through hole is smaller than the outer diameter of the capillary tube. The limiting ring 21 is coaxial with the pipe orifice, and the limiting ring 21 is axially slidably mounted inside the pipe orifice. The bottom of the capillary tube is in contact and cooperation with the limiting ring 21. There are two groups of limiting components 22, and the two groups of limiting components 22 are symmetrically arranged on the limiting ring 21. The limiting component 22 includes a limiting ball 221, a limiting rod 222, and a limiting spring 223. Column holes 211 are symmetrically arranged on the limiting ring 21. The limiting ball 221 is fixedly mounted with the limiting rod 222. The limiting rod 222 is slidably mounted in the column hole 211. The limiting spring 223 is arranged between the limiting ring 21 and the limiting ball 221, and the limiting spring 223 is slidably mounted on the limiting rod 222. Limiting grooves 13 are uniformly arranged inside the pipe orifice in the axial direction. The limiting ball 221 is in interference contact with the limiting groove 13. An external force is applied to the limiting ring 21 to adjust the position of the limiting ring 21 inside the pipe orifice. When the limiting ring 21 slides inside the pipe orifice, the limiting ball 221 is subjected to the external force applied by the limiting groove 13, and the interference between the limiting ball 221 and the limiting groove 13 is disconnected, and the limiting spring 223 deforms. The pointer 12 and the limiting ring 21 are magnetically coupled. During this process, the limiting ring 21 drives the pointer 12 to slide on the shaft rail 11, and the position of the pointer 12 reflects the position of the limiting ring 21 until the limiting ring 21 is adjusted to the target position, and the position of the limiting ring 21 is the position of the bottom of the capillary tube.

[0027] As Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9As shown in the figure, the centering mechanism fixes the capillary tube to make the capillary tube coaxial with the orifice of the drying filter. The centering mechanism is arranged inside the orifice. The centering mechanism includes a centering ring 31, an arc plate 32, a stud 33, a centering assembly 34, and a centering strip 35. There are multiple groups of studs 33 and centering assemblies 34 respectively. The studs 33 are evenly and fixedly installed on the centering ring 31. Threads are provided inside the studs 33. The arc plate 32 is rotationally installed inside the studs 33 through the threads. The arc plate 32 is coaxial with the centering ring 31. By rotating the arc plate 32, under the action of thread engagement, the arc plate 32 axially moves on the stud 33. Multiple ear pins 311 are provided on the centering ring 31. The studs 33 and the centering assemblies 34 are arranged alternately on the centering ring 31. One group of centering assemblies 34 corresponds to one group of ear pins 311. Multiple sliding grooves 312 are radially provided on the centering ring 31. One group of sliding grooves 312 corresponds to one group of centering assemblies 34. The centering assembly 34 includes a centering arc block 341, a connecting rod 342, a slider 343, and a centering spring 344. The bottom of the centering arc block 341 is rotationally installed on the ear pin 311 of the centering ring 31. The bottom of the arc plate 32 is in contact and cooperation with the outer wall of the end of the centering arc block 341. A rod pin 3411 is provided on the centering arc block 341. The slider 343 is radially slidably installed on the sliding groove 312 of the centering ring 31. One end of the connecting rod 342 is rotatably connected to the rod pin 3411 of the centering arc block 341. One end of the connecting rod 342 is rotatably connected to the slider 343. The centering spring 344 is arranged between the slider 343 and the centering ring 31. When the arc plate 32 axially moves on the stud 33, it drives the centering arc block 341 to swing on the ear pin 311 of the centering ring 31, and drives the slider 343 to slide on the sliding groove 312 through the connecting rod 342. One group of centering arc blocks 341 corresponds to one group of centering strips 35. The centering strip 35 is fixedly installed on the top of the centering arc block 341. The arc plate 32 drives the centering arc block 341 to swing on the ear pin 311, so that the centering strip 35 is in close contact with the capillary tube, thereby fixing capillary tubes of different sizes. The centering spring 344 assists the bottom of the arc plate 32 and the outer wall of the end of the centering arc block 341 to always be in contact, and assists the centering arc block 341 to return to its initial position.

[0028] Working principle: When welding the capillary tube to the orifice of the drying filter, the capillary tube needs to be inserted into the orifice of the drying filter. According to requirements, determine the depth of insertion of the capillary tube into the orifice of the drying filter.

[0029] After the depth is determined, an external force is applied to the limiting ring 21 to adjust the limiting ring 21 to the target position. During the axial sliding inside the pipe orifice, the limiting ball 221 is subjected to the external force applied by the limiting groove 13, and the engagement between the limiting ball 221 and the limiting groove 13 is disconnected, and the limiting spring 223 deforms. During this process, the limiting ring 21 is magnetically coupled between the pointer 12 and the limiting ring 21. The limiting ring 21 drives the pointer 12 to slide on the shaft rail 11, and the position of the limiting ring 21 is reflected by the position of the pointer 12 until the limiting ring 21 is adjusted to the target position. Under the elastic action of the limiting spring 223, the limiting ball 221 and the limiting groove 13 continue to engage, and the position of the limiting ring 21 is the position of the bottom of the capillary tube.

[0030] The centering mechanism is sleeved outside the capillary tube. The arc plate 32 is rotated. Under the action of the threaded fit, the arc plate 32 axially moves on the stud 33. The bottom of the arc plate 32 is in contact and cooperation with the outer wall of the end of the centering arc block 341. The arc plate 32 drives the centering arc block 341 to swing on the ear pin 311 of the centering ring 31, and the connecting rod 342 drives the slider 343 to slide on the sliding groove 312 until the centering strip 35 is in close contact with the capillary tube, so as to fix capillary tubes of different sizes.

[0031] The centering ring 31 is axially installed inside the orifice of the drying filter. The centering ring 31 is coaxial with the orifice. The centering ring 31 drives the capillary tube to move towards the limiting ring 21 until the bottom of the capillary tube is in contact and cooperation with the limiting ring 21. The centering ring 31 and the capillary tube stop sliding. At this time, the capillary tube is coaxial with the orifice of the drying filter, and the capillary tube and the orifice of the drying filter are in a relatively static state, which is convenient for welding the orifice of the drying filter and the capillary tube, preventing relative displacement between the capillary tube and the orifice of the drying filter during the welding process, and cracks from occurring in the welded part, resulting in leakage, and improving the welding quality.

[0032] The present invention is not limited to the above specific embodiments. Those skilled in the art in the technical field can make various changes starting from the above concept without creative labor, and all fall within the protection scope of the present invention.

Claims

1. A limit drying filter, characterized in that: It includes a drying filter and a limiting mechanism. A limiting mechanism is arranged inside the pipe orifice of the drying filter. The limiting mechanism includes a limiting ring (21) and two groups of limiting components (22). The limiting ring (21) is axially slidably installed inside the pipe orifice, and the two groups of limiting components (22) are symmetrically arranged on the limiting ring (21); a capillary tube is arranged inside the pipe orifice, a centering ring (31) is sleeved on the capillary tube, and multiple groups of centering components (34) are evenly arranged on the centering ring (31). The centering components (34) fix the capillary tube and the pipe orifice to be coaxial. The bottom of the capillary tube contacts the limiting ring (21), and the limiting components (22) contact the inner wall of the pipe orifice to limit the position of the limiting ring (21), thereby limiting the position of the capillary tube.

2. The a position-limiting drying filter according to claim 1, wherein: An axial rail (11) is arranged on the pipe orifice of the drying filter. A scale is arranged on the axial rail (11), and a pointer (12) is slidably installed on the axial rail (11). The pointer (12) is magnetically coupled with the limiting ring (21).

3. The a limit drying filter according to claim 1, wherein: The limiting component (22) includes a limiting ball (221) and a limiting spring (223). Column holes (211) are symmetrically arranged on the limiting ring (21). A limiting rod (222) is fixedly installed on the limiting ball (221). The limiting rod (222) is slidably installed in the column holes (211). The limiting spring (223) is arranged between the limiting ring (21) and the limiting ball (221). The limiting spring (223) is slidably installed on the limiting rod (222). Limiting grooves (13) are symmetrically and evenly arranged axially inside the pipe orifice. The limiting ball (221) is in interference contact with the limiting grooves (13).

4. The a limit drying filter according to claim 1, characterized in that: The centering component (34) includes a centering arc block (341) and a slider (343). The bottom of the centering arc block (341) is rotatably installed on the ear pin (311) of the centering ring (31). A rod pin (3411) is arranged on the centering arc block (341). The slider (343) is radially slidably installed in the chute (312) of the centering ring (31). A connecting rod (342) is rotatably connected between the rod pin (3411) of the centering arc block (341) and the slider (343). A centering spring (344) is arranged between the slider (343) and the centering ring (31).

5. The limit drying filter according to claim 4, characterized in that: A centering strip (35) is arranged at the top of the centering arc block (341). The centering strip (35) is in contact and cooperation with the capillary tube.

6. The limit drying filter according to claim 4, characterized in that: Multiple groups of stud bolts (33) are evenly arranged on the centering ring (31). The stud bolts (33) and the centering components (34) are arranged in an alternating manner. An arc plate (32) is rotatably installed inside the stud bolt (33) through threads. The bottom of the arc plate (32) is in contact and cooperation with the outer wall of the end of the centering arc block (341).

7. The a limit drying filter according to claim 1, characterized in that: The limiting ring (21) is a rotating body, and a through hole penetrating the entire rotating body is arranged in the axial direction of its axis. The radius of the through hole is smaller than the outer diameter of the capillary tube.

8. The limit drying filter according to claim 1, characterized in that: The outer diameter of the limiting ring (21) and the outer diameter of the centering ring (31) are both equal to the inner diameter of the pipe orifice of the drying filter.

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