Sealing device of rotary cutting tool bit

Abstract

The utility model relates to the technical field of cutting tool bits, and discloses a sealing device of a rotary cutting tool bit, which comprises a high-pressure water inlet pipe and a cutting flow guide tool bit, a sand mixing flow guide pipe is arranged at the top of the cutting flow guide tool bit, and a sand inlet hose is arranged on the side face of the sand mixing flow guide pipe. And the top of the sand mixing flow guide pipe is hermetically coupled with a bearing mounting seat. According to the utility model, when the adjustable inner ring and the bearing mounting seat rotate to drive the high-pressure inner pipe to be connected with the pipe, the adjustable inner ring and the rotary sealing pipe can be kept immovable and can rotate for operation without leakage, and the auxiliary sealing ring can be elastically pushed to be sealed at the seam of the rotary sealing pipe and the bearing mounting seat by the fixed sleeving clamp spring; the whole structure is composed of two parts, rotating operation can be independently carried out, the device is provided with a rotating sealing structure, the tool bit can stably carry out rotating cutting operation, meanwhile, the anti-leakage sealing capacity is excellent, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tool heads, in particular to a sealing device for a rotating cutting tool head. Background Art

[0002] With the continuous development of the machinery manufacturing industry, rotary cutting heads are more and more widely used in various processing equipment. The working principle of the water jet is to pressurize the water flow to more than 200MPa, and form a high-speed "water arrow" under the constraint of a nozzle with a very small diameter (generally greater than 0.2mm). By adding sand to the jet water flow, the high-speed jet of sand-containing water can be used to directly cut the workpiece, and it can penetrate various hard materials such as rock, glass, steel plate, etc. Since the water jet uses the principle of water compression for cutting, the sealing problem of the rotary cutting head has always been a key factor affecting the performance and service life of the equipment.

[0003] Existing water jet cutting heads usually have an integrated overall sealing structure, which can stably cooperate with abrasive materials for efficient cutting operations. However, in actual use, the cutter needs to be rotated and adjusted during operation. Since the water pressure in the water jet is usually large, leakage is prone to occur at the joints of its rotating structure, and it is impossible to perform rotary cutting on tangents with an angle greater than 360 degrees. The rotary cutting ability of the rotary cutting head is relatively insufficient, and the sealing is relatively not good enough. For this reason, we propose a sealing device for a rotary cutting head to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a sealing device for a rotary cutting cutter head, which has a rotary sealing structure. The cutter head can stably perform rotary cutting operations. At the same time, it has the advantages of excellent anti-leakage sealing ability and good practicality. It solves the problem that the sealing of the existing rotary sealing cutter head is relatively insufficient and it is easy to leak and be damaged due to excessive internal water pressure.

[0006] (II) Technical solution

[0007] In order to realize the above-mentioned rotary sealing structure, the cutter head can stably perform the rotary cutting operation, and at the same time, the anti-leakage sealing ability is excellent and the practicality is good, the utility model provides the following technical solutions: a sealing device for a rotary cutting cutter head, comprising a high-pressure water inlet pipe and a cutting guide cutter head, and a sand mixing guide pipe is provided on the top of the cutting guide cutter head;

[0008] A sand inlet hose is provided on the side of the sand mixing guide pipe, a bearing mounting seat is provided on the top sealing coupling of the sand mixing guide pipe, a rotating sealing pipe is provided at the bottom of the high-pressure water inlet pipe, a high-pressure inner tube connecting pipe is provided on the top of the bearing mounting seat, and both ends of the high-pressure inner tube connecting pipe are respectively plugged into the inner side of the bearing mounting seat and the rotating sealing pipe;

[0009] A support ring and a fixed sleeve clamp are provided in the middle of the outer side of the rotating sealing tube, an auxiliary protection outer tube is rotatably connected to the outer side of the support ring, the auxiliary protection outer tube is threadedly connected to the bearing mounting seat, an auxiliary sealing ring is provided at the bottom of the fixed sleeve clamp, and the auxiliary sealing ring is slidably connected to the joint of the rotating sealing tube and the bearing mounting seat;

[0010] Among them, the top of the high-pressure inner tube connecting tube is rotatably connected with an adjustable inner ring, the adjustable inner ring is located inside the rotating sealing tube, and the support ring and the fixed sleeve retaining ring are both sleeved on the inside of the auxiliary protection outer tube.

[0011] Preferably, a sealing inner thread short-circuit ring is provided at the bottom of the high-pressure water inlet pipe, the top of the rotating sealing tube extends and is connected to the sealing inner thread short-circuit ring, and the high-pressure water inlet pipe is connected to the rotating sealing tube sealing coupling by the sealing inner thread short-circuit ring.

[0012] Preferably, the sand inlet hose comprises a hard mounting pipe and a connecting hose, the hard mounting pipe is arranged on a side of the sand mixing guide pipe, and the connecting hose is connected to the side of the hard mounting pipe.

[0013] Preferably, the bottom of the sand mixing guide pipe is sealed and connected to the cutting guide blade coupling, and the bottom of the outer side of the high-pressure inner tube connecting pipe is provided with an installation sealing sleeve, and the high-pressure inner tube connecting pipe is plugged into the inner side of the bearing mounting seat by the installation sealing sleeve through interference sealing.

[0014] Preferably, an auxiliary rotating handle is provided on the outside of the auxiliary protective outer tube, a threaded fixing ring is provided on the bottom of the outside of the bearing mounting seat, the bottom thread of the inner side of the auxiliary protective outer tube is sleeved on the outside of the threaded fixing ring, and the threaded fixing ring is supported on the bottom of the auxiliary sealing ring.

[0015] Preferably, a rubber rotating ring is sleeved on the top of the outer side of the high-pressure inner tube connecting tube, and the high-pressure inner tube connecting tube is rotationally sealed to the inner side of the rotating sealing tube by the rubber rotating ring.

[0016] Preferably, a protective gasket is provided at the joint between the bearing mounting seat and the rotating sealing tube, the auxiliary sealing ring is sleeved on the outer side of the protective gasket, and the auxiliary sealing ring is rotatably connected to the protective gasket.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a sealing device for a rotary cutting head, which has the following beneficial effects:

[0019] 1. The sealing device of the rotary cutting cutter head is provided with the upper and lower ends of the high-pressure inner tube connecting pipe respectively inserted into the bearing mounting seat and the rotating sealing pipe, the top of the high-pressure inner tube connecting pipe is rotatably connected with an adjustable inner ring, when the bearing mounting seat rotates and drives the high-pressure inner tube connecting pipe, the adjustable inner ring and the rotating sealing pipe can remain stationary, and are not easy to leak while being able to rotate, the fixed sleeve clamping spring can elastically squeeze the auxiliary sealing ring, and push the auxiliary sealing ring to seal at the joint of the rotating sealing pipe and the bearing mounting seat, playing a double sealing role, and the auxiliary protection outer tube plays a limiting role, the overall structure consists of two parts, the two parts can be rotated separately while being sealed and connected, and the practicability is excellent, so that the device has a rotary sealing structure, the cutter head can stably perform rotary cutting operation, and at the same time, the anti-leakage sealing ability is excellent and the practicability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a frontal perspective schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a front view cross-sectional schematic diagram of the structure of the utility model;

[0022] Figure 3 It is a side cross-sectional schematic diagram of the structure of the utility model;

[0023] Figure 4 It is a top-down perspective schematic diagram of the structure of the utility model;

[0024] Figure 5 It is a front view stereoscopic schematic diagram of the high-pressure inner tube connecting pipe and the adjustable inner ring connecting structure of the utility model.

[0025] In the figure: 1. High-pressure water inlet pipe; 2. Cutting guide blade; 3. Mixing sand guide pipe; 4. Sand inlet hose; 5. Bearing mounting seat; 6. Rotating sealing pipe; 7. High-pressure inner pipe connecting pipe; 8. Fixed sleeve retaining ring; 9. Auxiliary protection outer pipe; 10. Auxiliary sealing ring; 11. Adjustable inner ring; 12. Sealing inner thread short-circuit ring; 13. Installing sealing sleeve; 14. Auxiliary rotating handle; 15. Threaded fixing ring; 16. Rubber rotating ring; 17. Protective pad ring; 18. Support ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5 , a sealing device for a rotary cutting head, comprising a high-pressure water inlet pipe 1 and a cutting guide head 2, wherein a sand mixing guide pipe 3 is provided on the top of the cutting guide head 2;

[0028] A sand inlet hose 4 is provided on the side of the sand mixing guide pipe 3, a bearing mounting seat 5 is provided on the top sealing coupling of the sand mixing guide pipe 3, a rotating sealing pipe 6 is provided at the bottom of the high-pressure water inlet pipe 1, a high-pressure inner tube connecting pipe 7 is provided on the top of the bearing mounting seat 5, and both ends of the high-pressure inner tube connecting pipe 7 are respectively plugged into the inner side of the bearing mounting seat 5 and the rotating sealing pipe 6;

[0029] A support ring 18 and a fixed sleeve clamp 8 are provided in the middle of the outer side of the rotating sealing tube 6. An auxiliary protection outer tube 9 is rotatably connected to the outer side of the support ring 18. The auxiliary protection outer tube 9 is threadedly connected to the bearing mounting seat 5. An auxiliary sealing ring 10 is provided at the bottom of the fixed sleeve clamp 8. The auxiliary sealing ring 10 is slidably connected to the joint between the rotating sealing tube 6 and the bearing mounting seat 5.

[0030] Among them, the top of the high-pressure inner tube connecting tube 7 is rotatably connected with an adjustable inner ring 11, the adjustable inner ring 11 is located inside the rotating sealing tube 6, and the support ring 18 and the fixed sleeve clamp 8 are both sleeved on the inside of the auxiliary protection outer tube 9;

[0031] The beneficial effects to be expressed by this scheme are as follows: by setting the upper and lower ends of the high-pressure inner tube connecting tube 7 to be respectively inserted into the bearing mounting seat 5 and the rotating sealing tube 6, the top of the high-pressure inner tube connecting tube 7 is rotatably connected with an adjustable inner ring 11. When the bearing mounting seat 5 rotates to drive the high-pressure inner tube connecting tube 7, the adjustable inner ring 11 and the rotating sealing tube 6 can remain motionless, and are not easy to leak while being able to rotate. The fixed sleeve retaining spring 8 can elastically squeeze the auxiliary sealing ring 10, and push the auxiliary sealing ring 10 to seal at the joint between the rotating sealing tube 6 and the bearing mounting seat 5, thereby playing a double sealing role. The auxiliary protective outer tube 9 plays a limiting role. The overall structure consists of two parts. While the two parts are sealed and connected, they can be rotated separately, which is of excellent practicality. The device has a rotating sealing structure, and the cutter head can stably perform a rotating cutting operation. At the same time, it has excellent anti-leakage sealing ability and good practicality.

[0032] Furthermore, a sealing inner thread shorting ring 12 is provided at the bottom of the high-pressure water inlet pipe 1, and the top of the rotary sealing pipe 6 extends and is connected to the sealing inner thread shorting ring 12, and the high-pressure water inlet pipe 1 is connected to the rotary sealing pipe 6 sealing coupling by the sealing inner thread shorting ring 12;

[0033] By providing the sealing inner thread short-circuit ring 12, the sealing inner thread short-circuit ring 12 and the rotary sealing tube 6 can be sealed and connected, the connection is tight and the connection effect is good.

[0034] Furthermore, the sand inlet hose 4 includes a hard installation pipe 41 and a connecting hose 42. The hard installation pipe 41 is arranged on the side of the sand mixing guide pipe 3, and the connecting hose 42 is connected to the side of the hard installation pipe 41.

[0035] The sand inlet hose 4 includes a hard mounting tube 41 and a connecting hose 42. The connecting hose 42 and the hard mounting tube 41 play a role in conducting sand. The connecting hose 42 is soft and easy to operate and adjust. The hard mounting tube 41 plays a role in installation and can be freely installed on the sand mixing guide tube 3. The installation and adaptation are convenient.

[0036] Furthermore, the bottom of the sand mixing guide pipe 3 is sealed and connected to the cutting guide blade head 2, and a mounting seal sleeve 13 is provided at the bottom of the outer side of the high-pressure inner pipe connecting pipe 7. The high-pressure inner pipe connecting pipe 7 is plugged into the inner side of the bearing mounting seat 5 by the mounting seal sleeve 13 through interference sealing.

[0037] The bottom of the sand mixing guide pipe 3 is sealed and connected to the cutting guide blade head 2, so the overall sealing is good and not easy to leak. In addition, a mounting sealing sleeve 13 is provided to make the connection between the high-pressure inner pipe connecting pipe 7 and the bearing mounting seat 5 tighter and have excellent sealing.

[0038] Furthermore, an auxiliary rotating handle 14 is provided on the outer side of the auxiliary protection outer tube 9, and a threaded fixing ring 15 is provided on the bottom of the outer side of the bearing mounting seat 5. The bottom of the inner side of the auxiliary protection outer tube 9 is threadedly sleeved on the outer side of the threaded fixing ring 15, and the threaded fixing ring 15 is supported on the bottom of the auxiliary sealing ring 10.

[0039] By providing an auxiliary rotating handle 14, the rotation adjustment is relatively simple and convenient. The threaded fixing ring 15 can play an auxiliary bearing role in the connection between the auxiliary protective outer tube 9 and the load-bearing mounting seat 5, so that the auxiliary protective outer tube 9 can be stably fixed on the load-bearing mounting seat 5 by the threaded fixing ring 15, and the whole can be tightly connected. The threaded fixing ring 15 can play a positioning and supporting role for the auxiliary sealing ring 10, and the installation operation is convenient and the practicality is excellent.

[0040] Furthermore, a rubber rotating ring 16 is sleeved on the top of the outer side of the high-pressure inner tube connecting tube 7, and the high-pressure inner tube connecting tube 7 is rotatably sealed to the inner side of the rotating sealing tube 6 by the rubber rotating ring 16;

[0041] By providing the rubber rotating ring 16, the high-pressure inner tube connecting tube 7 and the rotating sealing tube 6 can be stably sealed by the rubber rotating ring 16, and the rubber rotating ring 16 and the rotating sealing tube 6 can be rotated while being tightly connected, so that they can rotate stably, are not easy to leak, and have good practicality.

[0042] Furthermore, a protective gasket ring 17 is provided at the joint between the bearing mounting seat 5 and the rotating sealing tube 6, and the auxiliary sealing ring 10 is sleeved on the outer side of the protective gasket ring 17, and the auxiliary sealing ring 10 is rotatably connected to the protective gasket ring 17;

[0043] By setting the protective gasket 17, the joint between the bearing mounting seat 5 and the rotating sealing tube 6 is sealed, so that the rotating sealing tube 6 or the bearing mounting seat 5 can rotate stably and at the same time, the joint is sealed, and the auxiliary sealing ability is good.

[0044] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device belongs to a simple series and parallel connection circuit. There is no innovation in the circuit connection. Those skilled in the art can easily implement it. It belongs to the existing technology and will not be elaborated.

[0045] Working principle: A sand mixing guide pipe 3 is provided on the top of the cutting guide head 2 to play a sealing connection role. A sand inlet hose 4 is provided on the side of the sand mixing guide pipe 3 to guide the sand material into the cutting guide head 2 through the sand mixing guide pipe 3 to achieve the water flow sandblasting effect, and the water jet cutting ability is excellent;

[0046] A bearing mounting seat 5 is provided on the top of the sand mixing guide pipe 3, and a rotating sealing pipe 6 is provided on the bottom of the high-pressure water inlet pipe 1. A high-pressure inner tube connecting pipe 7 is provided between the bearing mounting seat 5 and the rotating sealing pipe 6. The upper and lower ends of the high-pressure inner tube connecting pipe 7 are respectively inserted into the bearing mounting seat 5 and the rotating sealing pipe 6, which has sealing ability and plays a turning bearing role;

[0047] The top of the high-pressure inner tube connecting tube 7 is rotatably connected with an adjustable inner ring 11, and the adjustable inner ring 11 is interference-filled in the interior of the rotating sealing tube 6, so that when the bearing mounting seat 5 rotates and drives the high-pressure inner tube connecting tube 7, the adjustable inner ring 11 and the rotating sealing tube 6 can remain stationary, play a bearing and sealing role, and can perform a rotating operation while not easy to leak;

[0048] A support ring 18 is provided on the outer side of the rotary sealing tube 6 to support the fixed sleeve retaining spring 8. The fixed sleeve retaining spring 8 can elastically squeeze the auxiliary sealing ring 10 so that the auxiliary sealing ring 10 can slide and seal at the joint of the rotary sealing tube 6 and the bearing mounting seat 5, thereby playing a double sealing role. The auxiliary protective outer tube 9 limits the fixed sleeve retaining spring 8 and the auxiliary sealing ring 10. At the same time, the bottom of the auxiliary sealing ring 10 can be threadedly connected to the bearing mounting seat 5 so that the bearing mounting seat 5 can drive the auxiliary sealing ring 10 when rotating. The overall structure consists of two parts. While the two parts are sealed and connected, they can be rotated separately, which is of excellent practicality. The device has a rotary sealing structure, and the cutter head can stably perform rotary cutting operations. At the same time, it has excellent anti-leakage sealing ability and good practicality, which solves the problem that the sealing of the existing rotary sealing cutter head is relatively insufficient and it is easy to leak and be damaged due to excessive internal water pressure.

[0049] 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for a rotary cutting head, comprising a high-pressure water inlet pipe (1) and a cutting guide head (2), characterized in that: A sand mixing guide pipe (3) is provided on the top of the cutting guide blade head (2); A sand inlet hose (4) is provided on the side of the sand mixing guide pipe (3), a bearing mounting seat (5) is provided on the top sealing coupling of the sand mixing guide pipe (3), a rotating sealing pipe (6) is provided on the bottom of the high-pressure water inlet pipe (1), a high-pressure inner tube connecting pipe (7) is provided on the top of the bearing mounting seat (5), and two ends of the high-pressure inner tube connecting pipe (7) are respectively plugged into the inner side of the bearing mounting seat (5) and the rotating sealing pipe (6); A support ring (18) and a fixed sleeve clamp (8) are provided in the middle of the outer side of the rotating sealing tube (6); an auxiliary protective outer tube (9) is rotatably connected to the outer side of the supporting ring (18); the auxiliary protective outer tube (9) is threadedly connected to the bearing mounting seat (5); an auxiliary sealing ring (10) is provided at the bottom of the fixed sleeve clamp (8); the auxiliary sealing ring (10) is slidably connected to the joint between the rotating sealing tube (6) and the bearing mounting seat (5); The top of the high-pressure inner tube connecting tube (7) is rotatably connected with an adjustable inner ring (11), the adjustable inner ring (11) is located inside the rotating sealing tube (6), and the support ring (18) and the fixed sleeve clamp (8) are both sleeved on the inside of the auxiliary protection outer tube (9).

2. A sealing device for a rotary cutting head according to claim 1, characterized in that: A sealing inner thread short-circuit ring (12) is provided at the bottom of the high-pressure water inlet pipe (1), the top of the rotary sealing pipe (6) extends and is connected to the sealing inner thread short-circuit ring (12), and the high-pressure water inlet pipe (1) is connected to the rotary sealing pipe (6) sealing coupling via the sealing inner thread short-circuit ring (12).

3. A sealing device for a rotary cutting head according to claim 1, characterized in that: The sand inlet hose (4) comprises a hard mounting pipe (41) and a connecting hose (42); the hard mounting pipe (41) is arranged on the side of the sand mixing guide pipe (3); and the connecting hose (42) is connected to the side of the hard mounting pipe (41).

4. A sealing device for a rotary cutting head according to claim 1, characterized in that: The bottom of the sand mixing guide pipe (3) is sealedly connected to the cutting guide blade (2) coupling, and a mounting seal sleeve (13) is provided at the bottom of the outer side of the high-pressure inner tube connecting pipe (7). The high-pressure inner tube connecting pipe (7) is plugged into the inner side of the bearing mounting seat (5) by means of interference sealing of the mounting seal sleeve (13).

5. The sealing device for a rotary cutting head according to claim 1, characterized in that: An auxiliary rotating handle (14) is provided on the outer side of the auxiliary protection outer tube (9), a threaded fixing ring (15) is provided on the bottom of the outer side of the support mounting seat (5), the bottom of the inner side of the auxiliary protection outer tube (9) is threadedly sleeved on the outer side of the threaded fixing ring (15), and the threaded fixing ring (15) is supported on the bottom of the auxiliary sealing ring (10).

6. A sealing device for a rotary cutting head according to claim 1, characterized in that: A rubber rotating ring (16) is sleeved on the top of the outer side of the high-pressure inner tube connecting tube (7), and the high-pressure inner tube connecting tube (7) is rotationally sealed to the inner side of the rotating sealing tube (6) by the rubber rotating ring (16).

7. The sealing device for a rotary cutting head according to claim 1, characterized in that: A protective gasket (17) is provided at the joint between the bearing mounting seat (5) and the rotary sealing tube (6); the auxiliary sealing ring (10) is sleeved on the outer side of the protective gasket (17); and the auxiliary sealing ring (10) is rotatably connected to the protective gasket (17).

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