Liquid spiral multilayer filter

Abstract

The invention discloses a spiral multi-layer liquid filter, and relates to the technical field of petrochemical engineering. According to the spiral multi-layer liquid filter, by arranging the first filter screen, the contact area between liquid and the first filter screen during liquid filtration is increased, the liquid filtration efficiency is greatly improved, and by arranging the second filter screen and the third filter screen, the liquid filtered by the first filter screen can be subjected to secondary filtration again, so that the liquid filtration effect is enhanced; the production efficiency is improved, by arranging a first mounting groove, a third mounting groove and the like, the fixing cylinder, the first connecting ring, the second connecting ring and the annular connecting block can be conveniently disassembled and assembled, the replacement time is shortened, manpower and material resources are greatly saved, and meanwhile the service life is prolonged; after the second connecting ring, the second connecting ring and the fixing cylinder are assembled with the annular connecting block, the stability after the second connecting ring, the second connecting ring and the fixing cylinder are assembled with the annular connecting block is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical industry, in particular to a liquid spiral multi-layer filter. Background Art

[0002] With the development of science and technology, the demand for energy is getting higher and higher, and the requirements for energy quality are also getting higher and higher, especially the purity of petroleum. Petroleum is a black liquid extracted from deep underground strata in oil fields. After a series of processing steps, it produces gasoline for cars, diesel for agricultural diesel engines, aviation kerosene used as aircraft fuel, and liquefied petroleum gas for cooking at home. The plastic bags we use in daily life, the chemical fiber clothes we wear, and even the fishing nets we use for fishing are all produced with petroleum as raw materials. Therefore, more and more attention is paid to the issue of petroleum purification and filtration for reuse.

[0003] At present, the filters on the market are generally made of single-layer nylon mesh or other mesh fabrics. When in use, there will be problems such as short service life of the filter, low pressure resistance, easy leakage, frequent replacement of filters, and time-consuming and labor-intensive replacement, which wastes a lot of manpower and material resources, seriously affects production, and has low efficiency. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies of the prior art, the present invention provides a liquid spiral multilayer filter, which solves the problems of short filter service life, low pressure resistance, easy leakage, and frequent and time-consuming and labor-intensive filter replacement.

[0005] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a liquid spiral multilayer filter comprises a fixing ring, the bottom of the fixing ring is fixedly connected to an annular connecting block, the bottom of the annular connecting block is provided with a first mounting groove, the bottom of the annular connecting block is provided with a second mounting groove, the bottom of the annular connecting block is provided with a third mounting groove, the internal thread of the first mounting groove is provided with a fixing cylinder, the outer surface of the fixing cylinder is provided with a first clamping groove, the interior of the fixing cylinder is fixedly installed with a first filter screen, the internal thread of the second mounting groove is provided with a first connecting ring, the bottom of the first connecting ring is fixedly connected to a second filter screen, the internal thread of the third mounting groove is provided with a second connecting ring, the end of the second connecting ring away from the annular connecting block is fixedly connected to the third filter screen, and the fixing ring is provided with a second connecting ring. A fixing cylinder is provided on the outer surface of the fixed cylinder, a second groove is provided on the outer surface of the first connecting ring, a third groove is provided on the inner wall of the second connecting ring, and sliding grooves are equidistantly provided inside the annular connecting block, and a sealing plate is sealingly and slidably connected to the inside of the sliding groove, and a limiting block is fixedly connected at the center of the side of the sealing plate, and an adjusting cavity is provided inside the annular connecting block, and an adjusting block is sealingly and slidably connected to the inside of the adjusting cavity, a threaded hole is provided at the inner center of the adjusting block, and a threaded rod is meshingly and rotatably connected to the inside of the threaded hole, and a rotating block is fixedly connected to one end of the threaded rod away from the adjusting block, and the interior of the adjusting cavity away from the rotating block is connected to the interior of the sliding groove, and a locating bearing is fixedly installed on the outer surface of the rotating block, and the outer surface of the locating bearing is fixedly installed inside the annular connecting block.

[0006] Furthermore, the interior of the slide groove is in a strong pressure state, the sealing plate and the slide groove are both circular, a sealing ring is fixedly installed on the outer surface of the sealing plate, and the second connecting ring, the second connecting ring and the top of the fixed cylinder all extend into the interior of the annular connecting block.

[0007] Furthermore, the surface of the limit block away from the sealing plate is arc-shaped, the number of the slide groove, the sealing plate and the limit block are three, and the three limit blocks are respectively engaged with the inside of the first slot, the second slot and the third slot.

[0008] Furthermore, the interiors of the first slot, the second slot and the third slot are all arc-shaped, and the first filter screen is spiral-shaped.

[0009] Furthermore, the interior of the fixed cylinder is a straight-through pipe, and the bottoms of the second filter screen and the third filter screen are both non-straight-through pipes.

[0010] Furthermore, the diameter of the circular holes on the surface of the first filter screen is larger than the diameter of the circular holes on the surface of the second filter screen, and the diameter of the circular holes on the surface of the second filter screen is larger than the diameter of the circular holes on the surface of the third filter screen.

[0011] Furthermore, the inner top ends of the second connecting ring, the first connecting ring and the fixing tube are all provided with threads matching the third mounting groove, the second mounting groove and the first mounting groove.

[0012] Furthermore, the diameter of the second mounting groove is larger than that of the first mounting groove, the diameter of the third mounting groove is larger than that of the second mounting groove, the diameter of the first connecting ring is larger than that of the fixed tube, the diameter of the second connecting ring is larger than that of the first connecting ring, and sealing gaskets are fixedly installed on the tops of the fixed tube, the first connecting ring and the second connecting ring.

[0013] Furthermore, sliding grooves are equidistantly provided inside the adjusting block, and a sliding rod is slidably connected inside the sliding groove. The end of the sliding rod away from the adjusting block is fixedly connected to the inner wall of the adjusting cavity, and an air leakage hole is provided on the surface of the annular connecting block. The interior of the adjusting cavity near the rotating block is connected to the outside of the annular connecting block through the air leakage hole.

[0014] Furthermore, one end of the threaded rod close to the adjustment block extends into the interior of the adjustment cavity, the outer surface of the rotating block is rotatably connected to the interior of the annular connecting block, the adjustment cavity and the adjustment block are both circular, and a sealing ring is fixedly installed on the outer surface of the adjustment block.

[0015] (III) Beneficial effects The present invention has the following beneficial effects: (1) The liquid spiral multilayer filter increases the contact area between the liquid and the first filter screen during filtration by setting the first filter screen, greatly improving the efficiency of liquid filtration, and can perform secondary filtration on the liquid filtered by the first filter screen by setting the second filter screen and the third filter screen, thereby enhancing the filtration effect of the liquid, enhancing the high efficiency, and prolonging the service life. It has a large bearing capacity, is not easy to leak, and improves production efficiency.

[0016] (2) The liquid spiral multilayer filter can facilitate the assembly of the fixing cylinder, the first connecting ring, the second connecting ring and the annular connecting block by providing the first mounting groove, the second mounting groove and the third mounting groove. When the first filter screen, the second filter screen and the third filter screen need to be replaced or cleaned, they can be quickly removed, which reduces the replacement time and greatly saves manpower and material resources.

[0017] (3) The liquid spiral multilayer filter is provided with a slide groove, a sealing plate and a limit block. When the second connecting ring, the second connecting ring and the fixed cylinder are assembled with the annular connecting block, the inside of the slide groove can be pressurized by rotating the rotating block, so that the surface of the limit block is tightly pressed against the inside of the second groove and the first groove, and the second connecting ring, the second connecting ring and the fixed cylinder can be positioned so that the second connecting ring, the second connecting ring and the fixed cylinder will not rotate actively after being assembled, thereby enhancing the stability of the second connecting ring, the second connecting ring and the fixed cylinder after being assembled with the annular connecting block.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the longitudinal structure of the present invention; Figure 3 It is a structural schematic diagram of the annular connecting block in the present invention; Figure 4 It is a schematic diagram of the structure of the fixed cylinder in the present invention; Figure 5 It is a structural schematic diagram of the first connecting ring in the present invention; Figure 6 is a schematic structural diagram of the second connecting ring in the present invention; Figure 7 for Figure 2 A partial enlarged schematic diagram of the structure of part A in the middle.

[0020] In the figure, 1, fixing ring; 2, annular connecting block; 3, first mounting groove; 31, fixing cylinder; 32, first filter screen; 33, first clamping groove; 4, second mounting groove; 41, first connecting ring; 42, second filter screen; 43, second clamping groove; 5, third mounting groove; 51, second connecting ring; 52, third filter screen; 53, third clamping groove; 201, slide groove; 202, sealing plate; 203, limit block; 204, adjusting chamber; 205, adjusting block; 206, threaded rod; 207, rotating block; 208, positioning bearing. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Embodiment 1: See also Figure 1-6 The embodiment of the present invention provides a technical solution: a liquid spiral multilayer filter comprises a fixing ring 1, a ring-shaped connecting block 2 is fixedly connected to the bottom of the fixing ring 1, a first mounting groove 3 is provided at the bottom of the ring-shaped connecting block 2, a second mounting groove 4 is provided at the bottom of the ring-shaped connecting block 2, a third mounting groove 5 is provided at the bottom of the ring-shaped connecting block 2, a fixing cylinder 31 is installed on the internal thread of the first mounting groove 3, a first clamping groove 33 is provided on the outer surface of the fixing cylinder 31, a first filter screen 32 is fixedly installed inside the fixing cylinder 31, a first connecting ring 41 is installed on the internal thread of the second mounting groove 4, a second filter screen 42 is fixedly connected to the bottom of the first connecting ring 41, a second connecting ring 51 is installed on the internal thread of the third mounting groove 5, a third filter screen 52 is fixedly connected to one end of the second connecting ring 51 away from the ring-shaped connecting block 2, a fixing cylinder 31 is provided on the outer surface of the fixing cylinder 31, a second clamping groove 43 is provided on the outer surface of the first connecting ring 41, and a third clamping groove 53 is provided on the inner wall of the second connecting ring 51; In this embodiment, by setting the first filter screen 32, the contact area between the liquid and the first filter screen 32 is increased during liquid filtration, which greatly improves the efficiency of liquid filtration. In addition, by setting the second filter screen 42 and the third filter screen 52, the liquid filtered by the first filter screen 32 can be filtered again at the second level, thereby enhancing the filtering effect of the liquid, increasing the efficiency, and improving production efficiency.

[0024] Embodiment 2: See also Figure 1-7 , the inside of the annular connecting block 2 is provided with equidistant sliding grooves 201, the inside of the sliding groove 201 is sealed and slidably connected with a sealing plate 202, the side center of the sealing plate 202 is fixedly connected with a limiting block 203, the inside of the annular connecting block 2 is provided with an adjusting cavity 204, the inside of the adjusting cavity 204 is sealed and slidably connected with an adjusting block 205, the inside center of the adjusting block 205 is provided with a threaded hole, the inside of the threaded hole is meshed and rotatably connected with a threaded rod 206, the end of the threaded rod 206 away from the adjusting block 205 is fixedly connected with a rotating block 207, the inside of the adjusting cavity 204 away from the rotating block 207 is connected with the inside of the sliding groove 201, the outer surface of the rotating block 207 is fixedly installed with a positioning bearing 208, and the outer surface of the positioning bearing 208 is fixedly installed inside the annular connecting block 2; Specifically, the interior of the chute 201 is in a strong pressure state, the sealing plate 202 and the chute 201 are both circular, a sealing ring is fixedly installed on the outer surface of the sealing plate 202, and the second connecting ring 51, the second connecting ring 51 and the top of the fixing cylinder 31 all extend to the interior of the annular connecting block 2; In this embodiment, by providing a sealing ring, the sealing performance between the sealing plate 202 and the slide groove 201 can be enhanced.

[0025] Specifically, the surface of the limit block 203 away from the sealing plate 202 is arc-shaped, the number of the slide groove 201, the sealing plate 202 and the limit block 203 are three, and the three limit blocks 203 are respectively engaged with the inside of the first card slot 33, the second card slot 43 and the third card slot 53; In this embodiment, the fixing tube 31 , the first connecting ring 41 and the second clamping groove 43 can be positioned by the clamping of the limiting block 203 .

[0026] Specifically, the interiors of the first card slot 33, the second card slot 43 and the third card slot 53 are all arc-shaped, and the first filter screen 32 is spiral-shaped; In this embodiment, since the first filter screen 32 is arc-shaped, the contact area between the liquid and the first filter screen 32 is increased during the liquid filtration, and the efficiency of the liquid filtration is greatly improved.

[0027] Specifically, the interior of the fixed cylinder 31 is a straight-through pipe, and the bottoms of the second filter screen 42 and the third filter screen 52 are non-straight-through pipes; In this embodiment, since the interior of the fixed cylinder 31 is a straight-through tube, the liquid can be completely in contact with the first filter screen 32; Specifically, the diameter of the circular holes on the surface of the first filter screen 32 is larger than the diameter of the circular holes on the surface of the second filter screen 42, and the diameter of the circular holes on the surface of the second filter screen 42 is larger than the diameter of the circular holes on the surface of the third filter screen 52; In this embodiment, the liquid can be filtered three times, thereby enhancing the filtering effect.

[0028] Specifically, the second connecting ring 51, the first connecting ring 41 and the inner top of the fixing tube 31 are all provided with threads matching the third mounting groove 5, the second mounting groove 4 and the first mounting groove 3; In this embodiment, it is convenient to assemble the second connecting ring 51 , the first connecting ring 41 , the fixing tube 31 and the annular connecting block 2 .

[0029] Specifically, the diameter of the second mounting groove 4 is larger than that of the first mounting groove 3, the diameter of the third mounting groove 5 is larger than that of the second mounting groove 4, the diameter of the first connecting ring 41 is larger than that of the fixing tube 31, the diameter of the second connecting ring 51 is larger than that of the first connecting ring 41, and sealing gaskets are fixedly installed on the tops of the fixing tube 31, the first connecting ring 41 and the second connecting ring 51; In this embodiment, by providing a sealing gasket, it is possible to prevent impurities from flowing out through the connection.

[0030] Specifically, sliding grooves are equidistantly provided inside the adjusting block 205, and a sliding rod is slidably connected inside the sliding groove. One end of the sliding rod away from the adjusting block 205 is fixedly connected to the inner wall of the adjusting cavity 204. An air leakage hole is provided on the surface of the annular connecting block 2, and the inside of the adjusting cavity 204 near the rotating block 207 is connected to the outside of the annular connecting block 2 through the air leakage hole. In this embodiment, the normal sliding of the adjustment block 205 can be ensured by providing the air leakage hole.

[0031] Specifically, one end of the threaded rod 206 close to the adjustment block 205 extends to the inside of the adjustment cavity 204, the outer surface of the rotating block 207 is rotatably connected to the inside of the annular connecting block 2, the adjustment cavity 204 and the adjustment block 205 are both circular, and a sealing ring is fixedly installed on the outer surface of the adjustment block 205; In this embodiment, by providing a sealing ring, the sealing between the adjustment block 205 and the adjustment cavity 204 can be enhanced.

[0032] During operation, the liquid enters the interior of the fixed cylinder 31 through the fixed ring 1, and then passes through the first filter screen 32 for the first filtration, and then passes through the end of the fixed cylinder 31 to enter between the fixed cylinder 31 and the second filter screen 42, and then the liquid passes through the second filter screen 42 for the second filtration, and the liquid after the secondary filter plate is filtered through the third filter screen 52. By setting the first filter screen 32, the contact area between the liquid and the first filter screen 32 is increased during filtration, which greatly improves the efficiency of liquid filtration, and by setting the second filter screen 42 and the third filter screen 52, the liquid filtered by the first filter screen 32 can be filtered again for the second level, which enhances the filtration effect of the liquid, enhances the efficiency, and improves the production efficiency; When the filter needs to be replaced, the rotating block 207 is first rotated to rotate the threaded rod 206 at the inner center of the adjusting block 205, and the adjusting block 205 is driven to slide in the direction of the rotating block 207. At this time, the interior of the slide groove 201 is in a negative pressure state, and the sealing plate 202 drives the limit block 203 to slide. When the interior of the first card slot 33, the second card slot 43 and the third card slot 53 are not in contact with the surface of the limit block 203, the fixing cylinder 31, the first connecting ring 41 and the second connecting ring 51 can be directly removed by rotating the fixing cylinder 31, the first connecting ring 41 and the second connecting ring 51, which reduces the replacement time and greatly saves manpower and material resources. After the fixing cylinder 31, the first connecting ring 41 and the second connecting ring 51 are replaced or cleaned, the fixing cylinder 31 is rotatably connected to the inside of the first mounting groove 3, the first connecting ring 41 is rotatably connected to the inside of the second mounting groove 4, and the second connecting ring 51 is rotatably connected to the inside of the second connecting ring 51. After tightening, by rotating the rotating block 207 in the opposite direction, the rotating block 207 drives the threaded rod 206 to rotate at the inner center of the adjusting block 205. At this time, the adjusting block 205 slides in the direction away from the rotating block 207. At this time, the internal pressure of the slide groove 201 increases, and forces the sealing plate 202 to carry The movable limit block 203 slides, and when the first slot 33, the second slot 43 and the third slot 53 are all engaged by the limit block 203, the fixed cylinder 31, the first connecting ring 41, the second connecting ring 51 and the annular connecting block 2 are assembled. The second connecting ring 51, the second connecting ring 51 and the fixed cylinder 31 can be positioned through the engagement, so that the second connecting ring 51, the second connecting ring 51 and the fixed cylinder 31 will not rotate actively after assembly, thereby enhancing the stability of the second connecting ring 51, the second connecting ring 51 and the fixed cylinder 31 after assembly with the annular connecting block 2.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A liquid spiral multilayer filter, comprising a fixing ring (1), characterized in that: The bottom of the fixing ring (1) is fixedly connected to an annular connecting block (2), the bottom of the annular connecting block (2) is provided with a first mounting groove (3), the bottom of the annular connecting block (2) is provided with a second mounting groove (4), the bottom of the annular connecting block (2) is provided with a third mounting groove (5), the inner thread of the first mounting groove (3) is provided with a fixing cylinder (31), the outer surface of the fixing cylinder (31) is provided with a first clamping groove (33), the inner part of the fixing cylinder (31) is fixedly installed with a first filter screen (32), the inner thread of the second mounting groove (4) is provided with a first connecting ring (41), the bottom of the first connecting ring (41) is fixedly connected to a second filter screen (42), the inner thread of the third mounting groove (5) is provided with a second connecting ring (51), and the end of the second connecting ring (51) away from the annular connecting block (2) is fixedly connected to the third filter screen (52), the outer surface of the fixing cylinder (31) is provided with a fixing cylinder (31), the outer surface of the first connecting ring (41) is provided with a second clamping groove ( 43), a third groove (53) is provided on the inner wall of the second connecting ring (51), sliding grooves (201) are provided at equal intervals inside the annular connecting block (2), a sealing plate (202) is sealingly and slidably connected inside the sliding groove (201), a limiting block (203) is fixedly connected at the center of the side of the sealing plate (202), an adjusting cavity (204) is provided inside the annular connecting block (2), an adjusting block (205) is sealingly and slidably connected inside the adjusting cavity (204), and the adjusting block A threaded hole is provided at the inner center of (205), and a threaded rod (206) is meshed and rotatably connected inside the threaded hole. One end of the threaded rod (206) away from the adjustment block (205) is fixedly connected to a rotating block (207). The interior of the adjustment cavity (204) away from the rotating block (207) is connected to the interior of the slide groove (201). A locating bearing (208) is fixedly mounted on the outer surface of the rotating block (207), and the outer surface of the locating bearing (208) is fixedly mounted inside the annular connecting block (2).

2. The liquid spiral multilayer filter according to claim 1, characterized in that: The interior of the slide groove (201) is in a strong pressure state, the sealing plate (202) and the slide groove (201) are both circular, a sealing ring is fixedly mounted on the outer surface of the sealing plate (202), and the second connecting ring (51), the top of the second connecting ring (51) and the fixing cylinder (31) all extend into the interior of the annular connecting block (2).

3. The liquid spiral multilayer filter according to claim 1, characterized in that: The surface of the limit block (203) away from the sealing plate (202) is arc-shaped, the number of the slide groove (201), the sealing plate (202) and the limit block (203) are three, and the three limit blocks (203) are respectively engaged with the inside of the first clamping groove (33), the second clamping groove (43) and the third clamping groove (53).

4. The liquid spiral multilayer filter according to claim 1, characterized in that: The interiors of the first clamping groove (33), the second clamping groove (43) and the third clamping groove (53) are all arc-shaped, and the first filter screen (32) is spiral-shaped.

5. The liquid spiral multilayer filter according to claim 1, characterized in that: The interior of the fixed cylinder (31) is a straight-through pipe, and the bottoms of the second filter screen (42) and the third filter screen (52) are both non-straight-through pipes.

6. The liquid spiral multilayer filter according to claim 1, characterized in that: The diameter of the circular holes on the surface of the first filter screen (32) is greater than the diameter of the circular holes on the surface of the second filter screen (42), and the diameter of the circular holes on the surface of the second filter screen (42) is greater than the diameter of the circular holes on the surface of the third filter screen (52).

7. The liquid spiral multilayer filter according to claim 1, characterized in that: The inner top ends of the second connecting ring (51), the first connecting ring (41) and the fixing tube (31) are all provided with threads matching the third mounting groove (5), the second mounting groove (4) and the first mounting groove (3).

8. The liquid spiral multilayer filter according to claim 1, characterized in that: The caliber of the second mounting groove (4) is larger than the caliber of the first mounting groove (3), the caliber of the third mounting groove (5) is larger than the caliber of the second mounting groove (4), the caliber of the first connecting ring (41) is larger than the caliber of the fixing tube (31), the caliber of the second connecting ring (51) is larger than the caliber of the first connecting ring (41), and sealing gaskets are fixedly mounted on the tops of the fixing tube (31), the first connecting ring (41) and the second connecting ring (51).

9. The liquid spiral multilayer filter according to claim 1, characterized in that: The adjusting block (205) has sliding grooves equidistantly formed inside, a sliding rod is slidably connected inside the sliding groove, one end of the sliding rod away from the adjusting block (205) is fixedly connected to the inner wall of the adjusting cavity (204), an air leakage hole is formed on the surface of the annular connecting block (2), and the inside of the adjusting cavity (204) close to the rotating block (207) is connected to the outside of the annular connecting block (2) through the air leakage hole.

10. The liquid spiral multi-layer filter according to claim 1, characterized in that: One end of the threaded rod (206) close to the adjustment block (205) extends into the interior of the adjustment cavity (204); the outer surface of the rotating block (207) is rotatably connected to the interior of the annular connecting block (2); the adjustment cavity (204) and the adjustment block (205) are both circular; and a sealing ring is fixedly mounted on the outer surface of the adjustment block (205).

Images