Moxibustion cylinder

Abstract

On the basis that a compression spring is arranged on the inner side of an end cover, a contact pin is further arranged at the tail end of the compression spring; the moxa stick is fixed to the inner side of the end cover through the inserting needle, when the moxa stick is ignited and inserted into the cylinder core, the end cover is held by hand instead of being held by hand, and fingers are far away from the moxa stick, so that the situation that the fingers are scalded is avoided, the use difficulty of the moxibustion cylinder is reduced, and the use safety is improved; on the premise that the combustion point of the moxa stick is always located at the lower end of the cylinder core through the compression spring, the inner cylinder is arranged in the outer cylinder and can move relative to the outer cylinder in the vertical direction, so that the distance between the combustion point of the moxa stick and the lower end of the outer cylinder is adjusted according to the moxibustion health care and treatment requirements and the tolerance difference of individuals to moxa heat, and the moxibustion effect is improved. The temperature of the moxa stick acting on the body surface is changed; in addition, ginger slices or steel meshes can be fixed through the connecting pieces at the lower end of the outer cylinder according to moxibustion requirements so as to carry out sandwiched moxibustion or thunder-fire moxibustion, and the moxibustion cylinder is flexible to use and has good practicability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of physiotherapy devices, and particularly relates to a moxa -moxibustion cylinder. BACKGROUND

[0002] Moxibustion is a method of burning moxa sticks made of moxa leaves to fumigate acupuncture points of the human body for health care and treatment. Moxa-moxibustion cylinders are auxiliary devices for more convenient and safer moxibustion. Traditional moxa-moxibustion cylinders have an end cap, a cylindrical barrel and a barrel core. The barrel core is arranged in the barrel and has a length direction corresponding to the barrel. The barrel core has a support part protruding radially inward at the lower end to prevent the moxa stick from falling. After the moxa stick is ignited, it is placed in the barrel core from the upper end of the barrel. Then, the end cap at the upper end of the barrel is breathable, and the lower end is fixed on the body surface, so that the heat generated by the burning of the moxa stick acts on the acupuncture points or specific parts of the body surface. However, the position of the moxa stick in the traditional moxa-moxibustion cylinder is fixed, and the burning point of the moxa stick moves upward and gradually away from the body surface. The distance between the burning point and the body surface affects the moxibustion effect. At this time, the end cap can be opened to move the moxa stick downward with a tool. This not only is troublesome to operate, but also has the risk of the moxa stick falling off the body surface. Or, the entire moxa-moxibustion cylinder with the moxa stick ignited is replaced. This not only wastes the moxa stick, but also discontinues the moxibustion and takes a long time.

[0003] Chinese patent CN221384348U discloses a moxa-moxibustion tool with controllable temperature and smoke filtering. The scheme is to arrange a spring extending axially in the inner side of the end cap. During moxibustion, the spring provides a downward pushing force to the moxa stick, so that the loose moxa material after the lower end of the moxa stick burns is compressed or dispersed on the support part, and the entire moxa stick moves downward with the burning, so that the distance between the burning point and the body surface is constant, and the moxibustion effect is guaranteed. In addition, the applicant also designs a moxa-moxibustion cylinder, which is specifically described in Chinese patent CN117618243A. Similarly, a spring is also used to provide a downward pushing force to the moxa stick. However, after trial, it is found that there are still other problems, such as the need to hold the moxa stick by hand to ignite it, and then place it in the barrel core. When the moxa stick used is relatively short, it is easy to cause finger burns. Therefore, it is necessary to further optimize the structure of the moxa-moxibustion cylinder to reduce the difficulty of use and improve safety. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the utility model is to provide a moxa-moxibustion cylinder to solve the technical problem that the moxa stick is easy to burn fingers when ignited and placed in the existing moxa-moxibustion cylinder, and to achieve the effect of reducing the difficulty of using the moxa-moxibustion cylinder and improving safety.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The application relates to a moxa cylinder, which comprises a cylindrical cylinder body and a cylinder core, the cylinder core is arranged in the cylinder body and corresponds to the cylinder body in the length direction, the lower end of the cylinder core is provided with a supporting part protruding inward in the radial direction, the upper end of the cylinder body is detachably connected with an end cover, the inner side of the end cover is connected with a compression spring corresponding to the cylinder body in the length direction, the lower end of the compression spring is located in the cylinder core, and the lower end of the compression spring is connected with a pin extending downward in the length direction and corresponding to the cylinder body.

[0007] Further, a ring-shaped baffle is coaxially arranged in the cylinder body below the cylinder core, the inner diameter of the baffle matches the inner diameter of the cylinder core, and the outer diameter of the baffle matches the inner diameter of the cylinder body.

[0008] Further, a plurality of connecting pieces are protruded on the lower surface of the baffle and close to the lower end of the cylinder body and are used for fixing ginger slices or steel meshes.

[0009] Further, a flange is protruded on the lower end of the cylinder body in the radial direction and outward, a gasket is abutted on the lower surface of the flange, and the gasket is detachably connected with the flange.

[0010] Further, a plurality of connecting parts are protruded on the lower surface of the baffle and are circumferentially distributed, the connecting pieces are located on the inner side of the circumferential distribution of the connecting parts, the free end of the connecting part extends outward in the radial direction and forms a mounting part, the mounting part is located between the lower surface of the flange and the gasket and abuts upward and downward, and the protruding length of the connecting part is greater than the protruding length of the connecting piece.

[0011] Further, a plurality of notches are circumferentially distributed on the lower end of the cylinder core, and the lower end of the cylinder core wall between adjacent notches extends inward in the radial direction and forms the supporting part.

[0012] Further, the cylinder body comprises an outer cylinder and an inner cylinder, the outer cylinder is sleeved on the outer cylinder and can be relatively moved in the vertical direction, the inner cylinder is protruded outward in the radial direction and has a ring-shaped limiting part on the lower end, the limiting part is used for abutting with the upper end of the outer cylinder to prevent the inner cylinder from being taken out downward, and the cylinder core is arranged in the inner cylinder.

[0013] Further, a plurality of circumferentially distributed air vents are arranged on the inner cylinder and the outer cylinder respectively, and the air vents on the inner cylinder and the outer cylinder are overlapped.

[0014] Further, the filter cotton net is arranged on the outer side of the inner cylinder and covers the air vents, and the filter cotton net is closely abutted with the inner side of the outer cylinder.

[0015] Further, the inner cylinder and the outer cylinder are plastic, the inner cylinder has a coaxial mounting ring, the mounting ring and the inner side of the inner cylinder are connected through a plurality of circumferentially distributed supporting rods, and the cylinder core is metal and is fixedly arranged in the mounting ring.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] 1. The moxa tube, on the basis of the compression spring arranged on the inner side of the end cover, a pin is arranged at the end of the compression spring; the compression spring keeps downward thrust on the moxa stick during moxa process, so that the loose moxa material after the lower end of the moxa stick burns is compressed or scattered on the supporting part, and the whole moxa stick moves downward with the burning, so that the distance between the burning point and the body surface is constant, and the moxa effect is guaranteed; the moxa stick is fixed in the inner side of the end cover through the pin, when the moxa stick is ignited and inserted into the core, the end cover is held instead of the moxa stick, so that the fingers are away from the moxa stick, thereby avoiding the situation that the fingers are scalded, and the use difficulty of the moxa tube is reduced, and the use safety is improved.

[0018] 2. The moxa tube, on the basis of the compression spring ensuring that the burning point of the moxa stick is always located at the lower end of the core, the inner tube is arranged in the outer tube and can move vertically relative to the outer tube, so that the distance between the burning point of the moxa stick and the lower end of the outer tube is adjusted according to the needs of moxa health care and treatment and the tolerance difference of individuals to the moxa heat, the temperature of the moxa stick acting on the body surface is changed, the moxa tube is more flexible to use, and has better practicality.

[0019] 3. The moxa tube, the lower end of the outer tube is provided with an annular baffle, and a plurality of connecting pieces are formed on the lower surface of the baffle; not only the baffle can receive the moxa material scattered from the lower end of the core to the surrounding, but also the moxa material with high temperature after burning is prevented from directly falling on the body surface, so as to improve the use safety of the moxa tube; and according to the moxa needs, the connecting pieces are inserted into the ginger slices or the steel mesh to fix them at the lower end of the outer tube, so as to carry out the object moxa or thunder fire moxa, so that the moxa tube is more flexible to use, and the practicality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the perspective view of the moxa tube of the embodiment;

[0021] Figure 2 It is the explosion view of the moxa tube of the embodiment;

[0022] Figure 3 It is the explosion view of the end cover of the embodiment;

[0023] Figure 4 It is the explosion view of the inner tube of the embodiment;

[0024] Figure 5 It is the explosion view of the outer tube of the embodiment;

[0025] Wherein, the barrel core 1, support part 2, end cover 3, compression spring 4, pin 5, inner barrel 6, outer barrel 7, external thread 8, internal thread 9, limiting convex rib 10, mounting disc 11, air hole 12, circular filter cotton net 13, connecting disc 14, spiral groove 15, sliding convex block 16, limiting part 17, air hole 18, cylindrical filter cotton net 19, notch 20, mounting ring 21, baffle 22, connecting sheet 23, flange 24, gasket 25, connecting part 26, mounting part 27, clamping convex 28, supporting lug 29, barrel 30. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.

[0027] EMBODIMENT

[0028] Please see Figure 1 and Figure 2 A moxa -moxibustion cylinder, including cylindrical barrel 30 and barrel core 1, barrel core 1 is arranged in barrel 30 and the length direction corresponds with barrel 30, barrel core 1 lower end has the support part 2 that protrudes along the radial direction to the inside, the upper end of barrel 30 is detachably connected with end cover 3, the inside of end cover 3 is connected with the compression spring 4 of the length direction corresponding with barrel 30, the lower end of compression spring 4 is located in barrel core 1, the lower end of compression spring 4 is connected with the pin 5 of the length direction corresponding with barrel 30, and the free end of pin 5 is downward.

[0029] The moxa -moxibustion cylinder of the utility model, on the basis that the compression spring 4 is arranged in the inside of end cover 3, still sets up pin 5 at the end of compression spring 4, when using, first, pin 5 is inserted to the center of moxa stick one end directly, then hand holds end cover 3 and ignites the free end of moxa stick, then hand holds end cover 3 and inserts moxa stick into barrel core 1 and makes end cover 3 and barrel 30 upper end connection, and the burning end of moxa stick is in abutment with support part 2, and compression spring 4 is compressed, finally, barrel 30 lower end is directly opposite the body surface position of being moxa -moxibusted and is fixed through bandage, adhesive tape or patch etc. tool, and the loose moxa material after moxa stick lower end burns is compressed or scattered on support part 2 during moxa -moxibusting process, and moxa stick overall moves down with burning, so that the distance between burning point and body surface is constant, guaranteeing moxa -moxibusting effect, moxa stick is fixed in the inside of end cover 3 through pin 5, and when igniting moxa stick and inserting moxa stick into barrel core 1, hand holds end cover 3 instead of hand holding moxa stick, so that finger is away from moxa stick, so as to avoid the situation that finger is scalded, which is favorable for reducing the use difficulty of the moxa -moxibusting cylinder and improving use safety.

[0030] As Figure 2 and 3As shown, in the embodiment, the barrel body 30 is composed of the inner barrel 6 and the outer barrel 7 sleeved outside the inner barrel 6, the lower end of the inner barrel 6 is higher than the lower end of the outer barrel 7, the upper end of the inner barrel 6 is higher than the upper end of the outer barrel 7, and the barrel core 1 is arranged in the inner barrel 6; the outer side surface of the inner barrel 6 is provided with the external thread 8 close to the upper end, the inner circumferential surface of the end cover 3 is provided with the internal thread 9 matched with the external thread 8, and the internal thread 9 is located in the external thread 8 to threadedly connect the end cover 3 with the inner barrel 6; the inner circumferential surface of the end cover 3 is formed with the limiting convex ribs 10 close to the top surface, the limiting convex ribs 10 are evenly distributed in the circumferential direction, the upper end of the compression spring 4 is outwardly extended in the radial direction in the shape of a volute to form the mounting disc 11 matched with the inner diameter of the end cover 3, the mounting disc 11 is located between the limiting convex ribs 10 and the top surface of the end cover 3 and abuts against each other in the up-down direction to fix the compression spring 4 on the inner side of the end cover 3; the top surface of the end cover 3 is provided with the air-permeable holes 12 in the shape of a ring grid, and the mounting disc 11 and the top surface of the end cover 3 are further abutted against each other and provided with the circular filter cotton net 13, which can reduce the smoke generated by the moxa stick combustion from escaping outward through the air-permeable holes 12, is beneficial to reducing the influence of moxibustion on the indoor environment and improving the use experience; the lower end of the compression spring 4 is inwardly extended in the radial direction in the shape of a volute to form the connecting disc 14 matched with the diameter of the compression spring 4, and the end of the spring wire is vertically extended to form the pin 5, so that the pin 5 is kept stable in structure at the lower end of the compression spring 4, and in implementation, the length of the pin 5 should not be too long and can fix the moxa stick, when the end cover 3 is connected to the upper end of the barrel body 30, the lower end of the compression spring 4 should be close to the lower end of the barrel core 1 to ensure that the moxa stick can be continuously pushed.

[0031] The moxibustion barrel further comprises the inner barrel 6 which can be vertically moved relative to the outer barrel 7 in the outer barrel 7, so that the distance between the burning point of the moxa stick and the lower end of the outer barrel 7 can be adjusted according to the needs of moxibustion health care and treatment and the tolerance difference of individuals to the moxa heat, the temperature of the moxa stick acting on the body surface is changed and is about 40-60 DEG C, the moxibustion barrel is more flexible in use and has better practicability. Figure 2 、 Figure 4 and Figure 5 The inner side surface of the outer barrel 7 is provided with the spiral groove 15 close to the lower end, the outer side surface of the inner barrel 6 is formed with the sliding convex block 16 matched with the spiral groove 15 close to the lower end, the sliding convex block 16 is located in the spiral groove 15 and is in sliding fit, so that the inner barrel 6 can be vertically moved in the outer barrel 7 by rotating.

[0032] Please refer to Figure 4The outer circumferential surface of the limiting part 17 is processed with anti-skid lines; thus, as the moxa stick contains moxa leaf oil, the hand is easy to be stained when taking and placing the moxa stick, and the anti-skid lines arranged on the limiting part 17 facilitate overcoming the lubricating effect caused by the moxa leaf oil when the inner cylinder 6 is twisted, so that the moxa stick has better practicability.

[0033] Please refer to Figure 4 and Figure 5 A plurality of air vents 18 are respectively arranged on the inner cylinder 6 and the outer cylinder 7 in a circumferential distribution, and the air vents 18 on the inner cylinder 6 and the outer cylinder 7 are overlapped, in this embodiment, the air vents 18 on the inner cylinder 6 are located above the sliding lugs 16, and the air vents 18 on the outer cylinder 7 are located above the helical grooves 15; thus, the air vents 18 on the inner cylinder 6 and the outer cylinder 7 are overlapped, so that the inside of the inner cylinder 6 is communicated with the outside environment through the air vents 18, which is helpful for the air circulation of the environment where the moxa stick is located, so that the moxa stick can be burned smoothly.

[0034] Please refer to Figure 2 and Figure 4 The inner cylinder 6 is externally provided with a cylindrical filter cotton net 19 covering the air vents 18, and the cylindrical filter cotton net 19 is tightly abutted with the inner side surface of the outer cylinder 7; thus, the cylindrical filter cotton net 19 not only can reduce the smoke generated by the burning of the moxa stick from escaping outward through the air vents 18, but also can increase the resistance of the rotation of the inner cylinder 6 relative to the outer cylinder 7, so as to avoid the accidental lowering of the inner cylinder 6 in the moxa treatment process.

[0035] Please refer to Figure 4 A plurality of notches 20 are circumferentially distributed on the lower end of the cylinder core 1, and the lower end of the wall of the cylinder core 1 between adjacent notches 20 extends radially inward to form the support part 2; thus, the cylinder core 1 supports the moxa stick through the support part 2 to prevent the moxa stick from being taken out downward, and the notches 20 are used for giving way to the loose moxa material after the moxa stick is burned, so as to be compressed or scattered around under the pushing force of the compression spring 4, thereby ensuring that the burning point of the moxa stick is always located at the lower end of the cylinder core 1.

[0036] Please refer to Figure 4The inner cylinder 6 and outer cylinder 7 are made of plastic. The inner cylinder 6 has a coaxial mounting ring 21, which is connected to the inner side of the inner cylinder 6 by multiple circumferentially distributed support rods (not shown in the figure). The core 1 is made of metal and is fixedly installed in the mounting ring 21. Specifically, the outer side of the core 1 has a locking protrusion 28, and the inner side of the mounting ring 21 has a locking groove (not shown in the figure) corresponding to the locking protrusion 28. The core 1 is fixed in the mounting ring 21 by the engagement of the locking protrusion 28 and the locking groove. The outer side of the core 1 has radially outwardly extending lugs 29, which are located above the locking protrusion 28 and abut against the upper end of the mounting ring 21 to prevent the core 1 from falling accidentally. In this way, the plastic inner cylinder 6 and outer cylinder 7 can be elastic. Deformation occurs when the spiral groove 15 does not extend to the upper end of the outer cylinder 7. Opposite axial forces are applied to the inner cylinder 6 and the outer cylinder 7 to disengage the sliding protrusion 16 from the spiral groove 15, thereby removing the inner cylinder 6 from the outer cylinder 7 for disassembly and cleaning. In addition, the metal core 1 can withstand the high temperature generated by the burning moxa stick, maintaining the structural stability of the moxa stick. The mounting ring 21 for placing the core 1 is connected to the inner cylinder 6 through the support rod, which helps to reduce the weight of the inner cylinder 6 and reduce the heat transfer from the core 1 to the outside, preventing the cylinder 30 from overheating. The lower end of the moxa stick can be connected to the outside through the gap between the support rods and the vent hole 12 on the end cap 3, which is conducive to the exchange of gases inside and outside the moxa stick and ensures that the moxa stick burns smoothly.

[0037] Please see Figure 5 An annular baffle 22 is coaxially provided below the inner cylinder 6 inside the outer cylinder 7. The inner diameter of the baffle 22 matches the inner diameter of the cylinder core 1, and the outer diameter of the baffle 22 matches the inner diameter of the outer cylinder 7. In this way, the baffle 22 can catch the moxa material that falls from the lower end of the cylinder core 1 to the surrounding area, and prevent the moxa material, which still has a high temperature after burning, from falling directly onto the body surface, which helps to improve the safety of using the moxibustion cylinder.

[0038] Please see Figure 5 The lower surface of the baffle 22 has a protrusion forming multiple connecting pieces 23, which are used to fix ginger slices or steel mesh. The connecting pieces 23 are close to the lower end of the outer cylinder 7. In this way, according to the moxibustion needs, ginger slices or steel mesh can be inserted through the connecting pieces 23 to fix them to the lower end of the outer cylinder 7. The connecting pieces 23 fix the ginger slices for indirect moxibustion and fix the steel mesh for thunder-fire moxibustion, making the moxibustion cylinder more flexible to use and improving its practicality.

[0039] Please see Figure 5The lower end of the outer cylinder 7 is radially outwardly convex to form a flange 24, and the lower surface of the flange 24 is provided with a gasket 25 abutting against the flange 24, which is detachably connected with the flange 24. In this embodiment, the gasket 25 is bonded below the flange 24. In this way, the contact area between the lower end of the outer cylinder 7 and the body surface is increased through the flange 24, which is conducive to reducing the compression of the moxa cylinder on the body surface during moxibustion. The gasket 25 is arranged below the flange 24, and the gasket 25 has better adhesion with the body surface, which is conducive to reducing heat loss and improving moxibustion effect.

[0040] Please refer to Figure 5 The lower surface of the baffle 22 is convex to form a plurality of connecting portions 26, which are distributed circumferentially. The connecting sheet 23 is located inside the circumferential distribution of the connecting portions 26. The free end of the connecting portion 26 extends radially outwardly to form a mounting portion 27, which is located between the lower surface of the flange 24 and the gasket 25 and abuts against each other. The convex length of the connecting portion 26 is greater than the convex length of the connecting sheet 23, so as to avoid the connecting sheet 23 from extending out of the cylinder body 30. In this way, not only can the baffle 22 better withstand the axial pressure when the inserted fixed ginger slices and steel mesh, but also the baffle 22 can be taken out from the lower end of the outer cylinder 7 by removing the gasket 25, so as to clean the remaining moxa materials on the outer cylinder 7 and the baffle 22.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the technical solutions. Those skilled in the art should understand that those who modify or equivalently replace the technical solutions of the present application without departing from the spirit and scope of the present application should be covered in the scope of the claims of the present application.

Claims

1. A moxa -cylinder, comprising a cylindrical cylinder body (30) and a cylinder core (1), the cylinder core (1) is arranged in the cylinder body (30) and the length direction corresponds to the cylinder body (30), the cylinder core (1) has a support part (2) which protrudes radially inward at the lower end, and the upper end of the cylinder body (30) is detachably connected with an end cover (3), characterized in that: The end cover (3) is connected with a compression spring (4) corresponding to the length of the cylinder (30) on the inside, the lower end of the compression spring (4) is located in the cylinder core (1), and the lower end of the compression spring (4) is connected with a pin (5) corresponding to the length of the cylinder (30) and extending downward.

2. The moxa -burning cylinder according to claim 1, characterized in that: The cylinder (30) is coaxially provided with an annular baffle (22) below the cylinder core (1), the inner diameter of the baffle (22) matches the inner diameter of the cylinder core (1), and the outer diameter of the baffle (22) matches the inner diameter of the cylinder (30).

3. The moxa -burning cylinder according to claim 2, characterized in that: A plurality of connecting pieces (23) are protruded on the lower surface of the baffle (22), the connecting pieces (23) are close to the lower end of the cylinder (30) and are used for fixing ginger slices or steel meshes.

4. The moxa -burning cylinder according to claim 3, characterized in that: The lower end of the cylinder (30) is protruded outward in the radial direction to form a flange (24), the lower surface of the flange (24) is abutted with a gasket (25), and the gasket (25) is detachably connected with the flange (24).

5. The moxa -curing tube according to claim 4, characterized in that: A plurality of connecting portions (26) are protruded on the lower surface of the baffle (22), the connecting portions (26) are distributed in the circumferential direction, the connecting pieces (23) are located on the inner side of the circumferential distribution of the connecting portions (26), the free end of the connecting portion (26) extends outward in the radial direction to form a mounting portion (27), the mounting portion (27) is located between the lower surface of the flange (24) and the gasket (25) and abuts up and down, and the protrusion length of the connecting portion (26) is greater than the protrusion length of the connecting piece (23).

6. The moxa -burning cylinder according to claim 1, characterized in that: A plurality of notches (20) are circumferentially distributed on the lower end of the cylinder core (1), and the lower end of the cylinder core (1) between adjacent notches (20) extends inward in the radial direction to form the support portion (2).

7. The moxa -burning cylinder according to claim 1, characterized in that: The cylinder (30) comprises an outer cylinder (7) and an inner cylinder (6), the outer cylinder (7) is sleeved outside the inner cylinder (6) and can relatively move in the vertical direction, the inner cylinder (6) is protruded outward in the radial direction to form a limiting portion (17) close to the upper end, the limiting portion (17) is used for abutting with the upper end of the outer cylinder (7) to prevent the inner cylinder (6) from being taken out downward, and the cylinder core (1) is arranged in the inner cylinder (6).

8. The moxa -burning cylinder according to claim 7, characterized in that: A plurality of circumferentially distributed air vents (18) are respectively arranged on the inner cylinder (6) and the outer cylinder (7), and the air vents (18) on the inner cylinder (6) and the outer cylinder (7) overlap.

9. The moxa -burning cylinder according to claim 8, characterized in that: A filter cotton net covering the air vents (18) is arranged on the outer side surface of the inner cylinder (6), and the filter cotton net is tightly abutted with the inner side surface of the outer cylinder (7).

10. The moxa -burning cylinder according to claim 7, characterized in that: The inner cylinder (6) and the outer cylinder (7) are plastic, the inner cylinder (6) has a mounting ring (21) coaxially arranged therein, the mounting ring (21) and the inner side surface of the inner cylinder (6) are connected by a plurality of circumferentially distributed supporting rods, and the cylinder core (1) is metal and fixedly arranged in the mounting ring (21).

Images