A fire protection pipe connection cutting device

Abstract

The present application provides a fire pipe connector cutting device, which relates to the technical field of pipe connector cutting. A fire pipe connector cutting device includes a rotating mechanism, a cutting mechanism and a balancing mechanism, wherein the rotating end of the rotating mechanism is used to fix the connector and drive the connector to rotate; the cutting mechanism is suitable for being displaced relative to the bracket to cut the connector when the rotating mechanism drives the connector to rotate; the balancing mechanism frame is used to suppress the axial deflection and axial displacement of the rotating mechanism; the two rotating rings on the balancing cylinder are used to support the rotating end of the rotating mechanism from the inside, and the two support seats mounted on the rotating mechanism form an internal and external double support to ensure the stability of the rotating end of the rotating mechanism, avoid the bearing from being worn under uneven load conditions and then causing axial movement of the bearing itself, and cause the rotating end of the rotating mechanism to have radial runout when driving the connector to rotate.

Description

Technical Field

[0001] The present application relates to the technical field of pipe connector cutting, and in particular to a fire protection pipe connector cutting device. Background Art

[0002] Fire pipe connectors are divided into many types according to their functions. Common ones include straight-through, tee, and cross-way connectors. When cutting the above connectors, a three-jaw clamping device is often used to fix the connector, and then a cutting device is used to cut the connector to achieve the cutting work of the pipe connector.

[0003] According to the needs of the process, the joint often needs to be rotated during the processing to adapt to the cutting work. In this case, the rotating shaft needs to be adapted to realize the rotation of the joint. However, during the cutting process, the side wall of the processing end of the joint will be subjected to radial force, which will cause the bearing on the rotating shaft to be subjected to irregular pressure, that is, the load on the bearing is uneven. Under long-term use, it is very easy to cause axial movement of the bearing, which will affect the cutting accuracy of the joint and the service life of the bearing. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a fire pipe connector cutting device, including a chassis, a control end is provided on one side of the chassis, a bracket for bearing is provided inside the chassis, and further includes: a rotating mechanism, a cutting mechanism and a balancing mechanism, the rotating end of the rotating mechanism is rotatably mounted on the bracket, and is used to fix the connector and drive the connector to rotate; the cutting mechanism is mounted on the bracket, and is suitable for displacing relative to the bracket to cut the connector when the rotating mechanism drives the connector to rotate; the balancing mechanism is mounted in the rotating end of the rotating mechanism, and is used to suppress the rotation of the rotating mechanism. The balancing mechanism comprises: a fixed seat, a balancing cylinder, a shaft, two first piston members and two swivels; the fixed seat is fixed to the chassis; the balancing cylinder is coaxially fixed to the fixed seat and coaxially plugged into the rotating end of the rotating mechanism; the shaft coaxially rotates on the balancing cylinder, and one end of the shaft extends out of the fixed seat; the two first piston members are symmetrically sealed and slide in the balancing cylinder, and hydraulic oil is filled between the two; the two swivels are symmetrically sealed and rotatably connected to the balancing cylinder, and abut against the rotating end of the rotating mechanism, and the outer diameter of the swivel is larger than the outer diameter of the balancing cylinder.

[0005] Preferably, a dirt collecting hopper is provided in the chassis, and the dirt collecting hopper is mounted on the bottom side of the rotating mechanism and the cutting mechanism for collecting cutting debris.

[0006] Preferably, the rotating mechanism includes a rotating shaft, two support seats, a driving motor, and a three-jaw chuck. The rotating shaft is the rotating end of the rotating mechanism. The rotating shaft is rotatably sleeved on the balancing cylinder and is in sealed contact with the two rotating rings. The two support seats are respectively fixed on the bracket and symmetrically sleeved on the rotating shaft. A ball bearing is fixed between the two support seats and the rotating shaft to enable the rotating shaft to rotate on the support seats. The driving motor is fixed on the bracket and drives the rotating shaft to rotate on the support seats through a belt pulley assembly. The three-jaw chuck is coaxially fixed to one end of the rotating shaft away from the fixed seat through a connecting flange and is used to fix the connecting member.

[0007] Preferably, the cutting mechanism includes a biaxial displacement assembly, a cutting tool disc, and a cutting power member. The biaxial displacement assembly is mounted on the bracket. The cutting tool disc is mounted on the biaxial displacement assembly. The cutting power member is mounted on the biaxial displacement assembly and is used to provide the power for the cutting tool disc to rotate.

[0008] Preferably, the balancing cylinder is divided into three sections by the two rotating rings. On the inner wall of each section, chutes are circumferentially and evenly arranged. The chutes in the two sections at both ends are in limit sliding fit with the two first piston members. The four ends of the balancing cylinder divided into three sections, which are respectively connected to the two rotating rings, have the same structure. On the four ends, an inner ring cavity and an outer ring cavity are concentrically arranged. A plurality of through holes are circumferentially and evenly arranged between the inner ring cavity and the outer ring cavity. An outer side sealing ring is hermetically embedded in the outer ring cavity, and the outer side sealing ring is arranged in a U shape with its open end facing the through hole.

[0009] Preferably, on the part of the shaft rod located inside the balancing cylinder, two external thread portions are symmetrically arranged on its side wall.

[0010] Preferably, a threaded ring is coaxially fixed on each of the two first piston members. The threaded ring is in threaded fit with the external thread portion. On the ends of the two threaded rings close to each other, a sealing pipe is symmetrically fixed. The sealing pipe is hermetically sleeved on the shaft rod and is coupled with the shaft rod.

[0011] Preferably, two side rings are symmetrically fixed at the two end faces of the rotating ring. The side wall of the side ring is in sealed sliding fit with the inner wall of the balancing cylinder. A first recessed portion is coaxially arranged on the side wall of the rotating ring, and a pressurizing rubber ring is hermetically embedded in the first recessed portion. A second recessed portion is coaxially arranged on the side walls of the two side rings, and an inner side sealing ring is hermetically embedded in the second recessed portion.

[0012] Preferably, an annular groove corresponding to the first recessed portion is coaxially arranged on the inner side of the rotating ring; a plurality of first radial through holes are evenly arranged circumferentially on the first recessed portion, and the plurality of first radial through holes are connected to the first recessed portion and the annular groove; a plurality of second radial through holes are evenly arranged circumferentially on the second recessed portion; and a plurality of axial through holes are evenly arranged circumferentially on the two end faces of the annular groove.

[0013] Preferably, a plurality of axial through holes on the same side are connected to the inner annular cavity on the side close to the same side.

[0014] The beneficial effects of the present invention are:

[0015] 1. Use the two swivels on the balancing cylinder to support the rotating end of the rotating mechanism from the inside, and cooperate with the two support seats set on the rotating mechanism itself to form internal and external double support to ensure the stability of the rotating end of the rotating mechanism, avoid uneven load on the bearings on the rotating end, avoid wear of the bearings under uneven load conditions, and avoid axial movement of the bearings, and cause radial runout of the rotating end of the rotating mechanism when driving the connecting parts to rotate;

[0016] 2. The shaft can be used to drive the two first pistons to move relative to each other in the balancing cylinder. By increasing the hydraulic pressure of the hydraulic oil between the two first pistons, a more stable contact is formed between the two swivels and the rotating end of the rotating mechanism, thereby improving the support strength of the two swivels to the rotating end of the rotating mechanism, further improving the stability of the rotating end of the rotating mechanism, and improving the accuracy of the connecting parts during the processing;

[0017] 3. The two first pistons move closer to each other in the balancing cylinder to increase the hydraulic pressure of the hydraulic oil, thereby improving the sealing performance between the swivel and the balancing cylinder, avoiding the degradation of the sealing performance between the two due to wear during long-term rotation, which in turn causes leakage in the balancing mechanism, and even the loss of internal support for the rotating end of the rotating mechanism due to leakage.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1It is a schematic diagram of the overall structure of a fire protection pipe connector cutting device according to an embodiment of the present application;

[0021] Figure 2 It is a schematic diagram of the internal structure of a fire protection pipe connector cutting device according to an embodiment of the present application;

[0022] Figure 3 The partial structure diagram of the rotating mechanism and the balancing mechanism according to the embodiment of the present application is shown in FIG. Figure 1 ;

[0023] Figure 4 The partial structure diagram of the rotating mechanism and the balancing mechanism according to the embodiment of the present application is shown in FIG. Figure 2 ;

[0024] Figure 5 is a partial structural cross-sectional view of a rotating mechanism and a balancing mechanism and a schematic diagram of the position of a buffer mechanism according to an embodiment of the present application;

[0025] Figure 6 is a structural exploded diagram of a rotating mechanism, a balancing mechanism, and a buffer mechanism according to an embodiment of the present application;

[0026] Figure 7 is a cross-sectional view of a balancing mechanism according to an embodiment of the present application;

[0027] Figure 8 According to the embodiment of the present application Figure 7 A is an enlarged schematic diagram;

[0028] Fig. 9 is an exploded view of a local structure of a swivel according to an embodiment of the present application;

[0029] Fig.10 is a partial structural schematic diagram of a balancing mechanism according to an embodiment of the present application;

[0030] Fig.11 According to the embodiment of the present application Fig.10 A magnified schematic diagram of B;

[0031] Fig.12 is an exploded view of the local structure of the balancing cylinder and the swivel according to an embodiment of the present application;

[0032] Fig.13 According to the embodiment of the present application Fig.12 A magnified schematic diagram of middle C;

[0033] Fig.14 It is a schematic diagram of the partial structure of a swivel according to an embodiment of the present application.

[0034] Icons: 1. Chassis; 11. Control terminal; 12. Dirt collecting hopper; 2. Rotating mechanism; 21. Rotating shaft; 22. Support seat; 221. Ball bearing; 23. Driving motor; 231. Pulley assembly; 24. Three-jaw chuck; 241. Connecting flange; 3. Cutting mechanism; 31. Double-axis displacement assembly; 32. Cutting disc; 33. Cutting power part; 4. Balancing mechanism; 41. Fixed seat; 42. Balancing cylinder; 421. Slideway; 422. Inner ring cavity; 423. Outer ring cavity; 424, through hole; 425, outer sealing ring; 43, shaft; 431, external threaded portion; 44, first piston member; 441, threaded ring; 442, sealing tube; 45, swivel; 451, side ring; 452, first recessed portion; 453, second recessed portion; 454, booster rubber ring; 455, inner sealing ring; 456, first radial through hole; 457, second radial through hole; 458, axial through hole; 5, buffer mechanism; 51, fixed disk; 52, second piston member. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Embodiment 1, as Figure 1 and Figure 2 As shown, a fire protection pipe connector cutting device according to an embodiment of the present application includes a chassis 1, a control terminal 11 is provided on one side of the chassis 1, and a bracket for bearing is provided inside the chassis 1, wherein the control terminal 11 is used to control the operation of the entire cutting device, and the specific control system prior art is already very mature and will not be elaborated here.

[0038] like Figure 1-Figure 14 As shown, a fire protection pipe connector cutting device according to an embodiment of the present application further includes a rotating mechanism 2, a cutting mechanism 3 and a balancing mechanism 4.

[0039] Among them, the rotating end of the rotating mechanism 2 is rotatably installed on the bracket, and is used to fix the connecting part and drive the connecting part to rotate; the cutting mechanism 3 is installed on the bracket, and is suitable for displacing relative to the bracket to cut the connecting part when the rotating mechanism 2 drives the connecting part to rotate; the balancing mechanism 4 is mounted in the rotating end of the rotating mechanism 2, and is used to suppress the axial deflection and axial displacement of the rotating mechanism 2.

[0040] It should be noted here that in the specific embodiment of the present application, the cutting end of the cutting mechanism 3 can be displaced relative to the bracket according to actual processing needs to adjust the position between itself and the connecting part to be processed to meet the cutting action on connecting parts of different thicknesses.

[0041] like Figure 3-Figure 7 As shown, the balancing mechanism 4 includes: a fixed seat 41 , a balancing cylinder 42 , a shaft 43 , two first piston members 44 and two rotating rings 45 .

[0042] The fixing seat 41 is fixed to the side wall of the chassis 1; the balancing cylinder 42 is coaxially fixed to the fixing seat 41 and coaxially plugged into the rotating end of the rotating mechanism 2; the shaft 43 coaxially rotates on the balancing cylinder 42, and one end of the shaft 43 extends out of the fixing seat 41 (it should be noted that in the specific embodiment of the present application, a rotating handle is installed at one end of the shaft 43 extending out of the fixing seat 41 to facilitate the rotation operation of the shaft 43, as shown in the specific example Figure 3-Figure 7 As shown); two first piston members 44 are symmetrically sealed and slide in the balancing cylinder 42, and hydraulic oil is filled between the two; two swivel rings 45 are symmetrically sealed and rotatably connected to the balancing cylinder 42 and abut against the rotating end of the rotating mechanism 2, and the outer diameter of the swivel ring 45 is larger than the outer diameter of the balancing cylinder 42.

[0043] In addition, a fire protection pipe connector cutting device according to an embodiment of the present application also has the following additional technical features:

[0044] Specifically, Figure 2 As shown, a dirt collecting hopper 12 is provided in the chassis 1, and the dirt collecting hopper 12 is mounted on the bottom side of the rotating mechanism 2 and the cutting mechanism 3 for collecting cutting debris.

[0045] like Figure 2 and Figure 3As shown, the rotating mechanism 2 includes: a rotating shaft 21, two supporting seats 22, a driving motor 23 and a three-jaw chuck 24, wherein the rotating shaft 21 is the rotating end of the rotating mechanism 2, the rotating shaft 21 is rotatably sleeved on the balancing cylinder 42, and forms a sealing abutment with the outer walls of the two rotating rings 45, and the two rotating rings 45 are used to support the rotating shaft 21 from the inside; the two supporting seats 22 are respectively fixed to the bracket and symmetrically sleeved on the rotating shaft 21, and ball bearings 221 are fixed between the two supporting seats 22 and the rotating shaft 21 to accommodate the rotation of the rotating shaft 21 on the supporting seats 22, and the two supporting seats 22 cooperate with the ball bearings therein 221 forms support for the rotating shaft 21 from the outside. It should be noted that in the specific embodiment of the present application, the support points formed by the two ball bearings 221 and the two rotating rings 45 for the rotating shaft 21 do not overlap, that is, four staggered support points are formed. Preferably, a trapezoid can be formed between the four support points to enhance the support stability of the rotating shaft 21; the driving motor 23 is fixed to the bracket, and drives the rotating shaft 21 to rotate on the support seat 22 through the pulley assembly 231; the three-jaw chuck 24 is coaxially fixed to the end of the rotating shaft 21 away from the fixed seat 41 through the connecting flange 241, and is used to fix the connecting piece.

[0046] It should be noted that the rotating structure formed between the pulley assembly 231 and the driving motor 23 is very mature in the prior art and will not be elaborated here. It is only necessary to enable the driving motor 23 to drive the rotating shaft 21 to rotate in the supporting seat 22.

[0047] like Figure 2 As shown, the cutting mechanism 3 includes: a dual-axis displacement component 31, a cutting disc 32 and a cutting power component 33. The dual-axis displacement component 31 is mounted on a bracket; the cutting disc 32 is mounted on the dual-axis displacement component 31; the cutting power component 33 is mounted on the dual-axis displacement component 31 and is used to provide rotational power to the cutting disc 32.

[0048] It should be noted that in the specific embodiment of the present application, the dual-axis displacement component 31 can produce horizontal displacement of the X-axis and the Y-axis on the bracket. There are many devices with this function in the prior art, and no specific limitation is made here. The setting of the cutting disc 32 allows for the installation of a variety of cutting tools thereon, so as to reduce the number and time of tool replacement and improve the working efficiency of the entire cutting device. The cutting power part 33 is a motor. As for the driving relationship between the cutting power part 33 and the cutting disc 32, the driving structure between the above-mentioned driving motor 23 and the rotating shaft 21 can be adopted, or it can be directly realized by connecting the output shaft of the cutting power part 33 with the axial key of the cutting disc 32. As long as the cutting disc 32 can be controlled to rotate for the purpose of replacing the tool, no structural limitation is deliberately made here.

[0049] In the specific embodiments of the present application, Figure 4 , Figure 6 , Figure 7 and Fig.10 As shown, the balancing cylinder 42 is divided into three sections by two rotating rings 45, and the inner wall of each section is evenly and circumferentially provided with sliding grooves 421, wherein the sliding grooves 421 in the two sections at the two ends are respectively matched with the two first piston members 44 for limiting sliding, so as to realize the stroke limitation and rotation interference of the two first piston members 44 in the balancing cylinder 42.

[0050] The structures of the four ends of the three-section balancing cylinder 42 connected to the two rotating rings 45 are consistent, that is, Figure 5 , Figure 7 and Fig.10 As shown, there are four ends connected between the balancing cylinder 42 and the two rotating rings 45, and the structures at the four ends are the same.

[0051] An inner ring cavity 422 and an outer ring cavity 423 are concentrically arranged on the four ends, and a plurality of through holes 424 are evenly arranged circumferentially between the inner ring cavity 422 and the outer ring cavity 423 .

[0052] An outer sealing ring 425 is sealed and embedded in the outer ring cavity 423 , and the outer sealing ring 425 is arranged in a V shape, with its open end facing the through hole 424 .

[0053] like Figure 5-Figure 8 As shown, the part of the shaft rod 43 located in the balancing cylinder 42 has two external threaded portions 431 symmetrically arranged on its side wall, and the two first piston members 44 are coaxially fixed with threaded rings 441, and the threaded rings 441 and the external threaded portions 431 are threadedly matched. It can be understood that through the rotation of the shaft rod 43, the two first piston members 44 thereon will be driven to undergo relative displacement in the balancing cylinder 42; the ends of the two threaded rings 441 close to each other are symmetrically fixed with sealing tubes 442, and the sealing sleeves of the sealing tubes 442 are arranged on the shaft rod 43 and coupled to the shaft rod 43. It should be noted that the arrangement of the two sealing tubes 442 on the shaft rod 43 prevents them from being displaced to the external threaded portion 431 when displacement occurs, thereby ensuring the sealing between the sealing tubes 442 and the shaft rod 43.

[0054] like Figure 5 , Figure 7 , Figure 9-11 As shown, two side rings 451 are symmetrically fixed at the two end faces of the rotating ring 45, and the side walls of the side rings 451 are sealingly slidably matched with the inner wall of the balancing tube 42, that is, the side rings 451 are located in the balancing tube 42; a first recessed portion 452 is coaxially arranged on the side wall of the rotating ring 45, and it should be noted that the first recessed portion 452 is annular, and a booster rubber ring 454 is sealed and embedded in the first recessed portion 452; second recessed portions 453 are coaxially arranged on the side walls of the two side rings 451, and it should be noted that the second recessed portion 453 is also annular, and an inner sealing ring 455 is sealed and embedded in the second recessed portion 453.

[0055] It can be understood that, in the specific embodiment of the present application, the inner sealing ring 455 sealed and embedded in the two second recessed portions 453 has the effect of sealing the swivel 45 and the balancing cylinder 42 from the inside.

[0056] Furthermore, an annular groove corresponding to the first recessed portion 452 is coaxially arranged on the inner side of the swivel 45; a plurality of first radial through holes 456 are evenly arranged circumferentially on the first recessed portion 452, and the plurality of first radial through holes 456 are connected to the first recessed portion 452 and the annular groove. It can be seen that the hydraulic oil will apply radial pressure to the boosting rubber ring 454 through the first radial through holes 456.

[0057] A plurality of second radial through holes 457 are evenly arranged circumferentially on the second recessed portion 453 . It can be seen that the hydraulic oil will apply radial pressure to the inner sealing ring 455 through the second radial through holes 457 .

[0058] Multiple axial through holes 458 are evenly arranged on the two end faces of the annular groove in a circumferential direction. The multiple axial through holes 458 on the same side are connected to the inner ring cavity 422 close to itself. It can be seen that the hydraulic oil will enter the inner ring cavity 422 through the axial through holes 458 and apply radial pressure to the outer sealing ring 425 via the through hole 424.

[0059] The following describes the use process of a fire protection pipe connector cutting device according to an embodiment of the present application with reference to the accompanying drawings:

[0060] When in use, the connecting piece to be processed is fixed on the three-jaw chuck 24, and the control end 11 is used to control the dual-axis displacement assembly 31 to drive the cutting disc 32 to move relative to the bracket, and the position between the tool on the cutting disc 32 and the connecting piece is corrected, and then the driving motor 23 is started to drive the rotating shaft 21 to rotate, and the tool on the cutting disc 32 is used to cut the connecting piece;

[0061] Before processing, the shaft 43 can be rotated according to the weight of the actual processing connection part, so that the two first piston members 44 in the balancing cylinder 42 are relatively displaced. In the embodiment of the present application, the two first piston members 44 are close to each other as an example for detailed description. When the two first piston members 44 are close to each other, the hydraulic oil filled between the two will be pressurized due to the external force. In this way, the hydraulic oil will simultaneously generate radial pressure on the outer sealing ring 425, the pressurized rubber ring 454 and the inner sealing ring 455 from the inside, and the outer sealing ring 425 and the inner sealing ring 455 respectively achieve a double sealing effect on the swivel 45 and the balancing cylinder 42. In this way, the radial pressure transmitted by the hydraulic oil will increase the sealing performance between the swivel 45 and the balancing cylinder 42 to avoid the reduction of the sealing performance due to wear between the two. At the same time, the pressurized rubber ring 454 is subjected to an outward radial force, which will form a tighter abutment between the swivel 45 and the inner wall of the balancing cylinder 42 to prevent slipping between the two, and the support stability formed between the balancing cylinder 42 and the swivel 45 due to the slipping phenomenon.

[0062] In the specific embodiment of the present application, the support points formed by the two ball bearings 221 and the two rotating rings 45 for the rotating shaft 21 do not overlap, that is, four staggered support points are formed. Preferably, a trapezoid can be formed between the four support points to enhance the support stability of the rotating shaft 21. In this way, the radial force on the rotating shaft 21 caused by cutting the connecting piece during the processing will be avoided from being transmitted to the two ball bearings 221, causing the ball bearings 221 to be worn due to uneven load, and then causing the ball bearings 221 to have axial runout and axial movement. In this way, through four support points and the effect of internal reinforced support, the rotating shaft 21 can avoid radial runout and axial movement during the processing as much as possible, thereby improving the processing accuracy of the connecting piece.

[0063] Embodiment 2. In the related art, a fire pipe connector cutting device increases the hydraulic pressure of the hydraulic oil between the two first piston members 44 by relative displacement in the balancing cylinder 42, thereby enhancing the sealing performance and supporting strength between the swivel 45 and the balancing cylinder 42. However, since the liquid is incompressible, a large resistance will be generated during the rotation of the shaft 43. Even forced rotation of the shaft 43 may cause damage to the two first piston members 44, or damage to the outer sealing ring 425, the boosting rubber ring 454 and the inner sealing ring 455, thereby causing the cutting device in the present application to lose its support capability for the inside of the balancing cylinder 42.

[0064] According to some embodiments of the present application, Figure 5 and Figure 6As shown, a buffer mechanism 5 is arranged between the two first piston members 44, and the buffer mechanism 5 includes: a fixed plate 51 and two second piston members 52, the fixed plate 51 is coaxially fixed to the balancing cylinder 42, the fixed plate 51 and the shaft rod 43 are sealed and matched, and coupled with the shaft rod 43, that is, the shaft rod 43 can rotate and axially displace relative to the fixed plate 51 (for easy installation or disassembly); the two second piston members 52 are sealed and slidable on the balancing cylinder 42, and compressible gas is filled therebetween; distance sensors are embedded on the two end faces of the fixed plate 51, which are used to monitor the distance between the two second piston members 52 relative to the fixed plate 51.

[0065] It can be understood that when the two first piston members 44 are relatively close to each other, the two second piston members 52 will be forced to approach each other under the action of the hydraulic oil, and the compressible gas therebetween will be compressed. In this way, the two first piston members 44 have a certain buffer stroke in the process of being relatively close to each other, and through the compression of the compressible gas, the pressure of the hydraulic oil on the first piston member 44, the outer sealing ring 425, the boosting rubber ring 454 and the inner sealing ring 455 can be elastically changed, which can enhance the stable support of the balancing cylinder 42 in the cutting device and the sealing performance between the balancing cylinder 42 and the swivel 45, while avoiding the possibility of damage to the above-mentioned components caused by the rigid pressure caused by the hydraulic oil.

[0066] There are a plurality of through holes distributed circumferentially on the fixed plate 51 for connecting the space between the two second piston members 52 .

[0067] Furthermore, the second piston member 52 and the slide groove 421 on the inner wall of the balancing cylinder 42 located in the middle section are limitedly slidably matched to form rotation interference of the second piston member 52 .

[0068] It should be noted that in the specific embodiment of the present application, the spaces between the first piston members 44 and the second piston members 52 on both sides of the fixed plate 51 are the same, and in the initial state, the distances between the two second piston members 52 and the fixed plate 51 are the same.

[0069] Therefore, during specific use, the pressure of the hydraulic oil on the first piston member 44, the outer sealing ring 425, the boost rubber ring 454 and the inner sealing ring 455 can be elastically changed through the compression or expansion of the compressible gas, thereby enhancing the stable support of the balancing cylinder 42 in the cutting device and the sealing performance between the balancing cylinder 42 and the swivel 45, while avoiding the possibility of damage to the above-mentioned components caused by the rigid pressure caused by the hydraulic oil. At the same time, the space between the two second piston members 52 is connected. Therefore, when the distance sensor monitors the asynchronous change of the spacing between the two second piston members 52 relative to the fixed plate 51 (that is, the strokes of the two second piston members 52 are different), it means that the hydraulic pressure on the outside of the two second piston members 52 is different, which will indicate that the sealing performance of the side with a shorter stroke is reduced. By monitoring the distance, the sealing condition in the balancing cylinder 42 can be known in time for maintenance.

[0070] Embodiment three, in the related art, in the fire pipe connector cutting device, during the processing, a sealing contact is formed between the rotating shaft 21 and the rotating ring 45 through the pressurized rubber ring 454, so the rotating rotating shaft 21 will drive the rotating ring 45 to rotate synchronously, so that there will be a relative rotation phenomenon between the rotating ring 45 and the balancing cylinder 42, and the rotation will cause the outer sealing ring 425 and the inner sealing ring 455 themselves or the surrounding sides to generate heat and even wear debris due to friction. Continuous processing action will cause the heat to be formed at the outer sealing ring 425 and the inner sealing ring 455 for a long time, and the possible wear debris will have a serious impact on the sealing performance of the outer sealing ring 425 and the inner sealing ring 455.

[0071] According to some embodiments of the present application, Fig.14 As shown, the second radial through hole 457 and the axial through hole 458 are respectively arranged obliquely.

[0072] The second radial through hole 457 is arranged obliquely in the radial direction of the rotating ring 45 .

[0073] Furthermore, the axial through hole 458 is arranged to be inclined in the axial direction of the rotating ring 45 .

[0074] It should be noted that if Fig.14 As shown, both of them are tilted to the left (the tilt directions are consistent).

[0075] Therefore, during actual use, when the swivel ring 45 rotates with the rotating shaft 21, the hydraulic oil will be stirred through the second radial through hole 457 and the axial through hole 458 which are obliquely arranged, so that the hydraulic oil will form a continuous flow in the second recessed portion 453 connected to the second radial through hole 457 and in the inner ring cavity 422 connected to the axial through hole 458. Through the continuous flow of hydraulic oil, the heat generated by the outer sealing ring 425 and the inner sealing ring 455 themselves or the surrounding sides due to friction and even wear debris will be carried away by the flowing hydraulic oil, thereby avoiding heat accumulation and debris accumulation at the outer sealing ring 425 and the inner sealing ring 455, reducing the degree of damage to the outer sealing ring 425 and the inner sealing ring 455 caused by heat or debris, and improving the sealing performance of the outer sealing ring 425 and the inner sealing ring 455 to a certain extent.

[0076] It should be noted that the specific models and specifications of the control end 11, the drive motor 23, the three-jaw chuck 24, the ball bearing 221, the pulley assembly 231, the connecting flange 241, the dual-axis displacement assembly 31, the cutting disc 32, the cutting power part 33, the first piston part 44 and the second piston part 52 need to be selected and determined according to the actual specifications of the device, and the specific selection and calculation method adopts the existing technology in the field, so it will not be described in detail.

[0077] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fire protection pipe connector cutting device, comprising a chassis (1), a control terminal (11) being arranged on one side of the chassis (1), and a support for bearing being arranged inside the chassis (1), characterized in that: It further includes: A rotating mechanism (2), the rotating end of the rotating mechanism (2) is rotatably installed on the bracket and is used to fix the connecting piece and drive the connecting piece to rotate; A cutting mechanism (3), the cutting mechanism (3) is installed on the bracket and is adapted to displace relative to the bracket when the rotating mechanism (2) drives the connecting piece to rotate so as to cut the connecting piece; A balancing mechanism (4), the balancing mechanism (4) is arranged in the rotating end of the rotating mechanism (2) and is used to suppress axial yaw and axial displacement of the rotating mechanism (2); The balancing mechanism (4) includes: a fixed seat (41), a balancing cylinder (42), a shaft rod (43), two first piston members (44) and two rotating rings (45); The fixed seat (41) is fixed to the chassis (1); The balancing cylinder (42) is coaxially fixed to the fixed seat (41) and is coaxially inserted into the rotating end of the rotating mechanism (2); The shaft rod (43) rotates coaxially in the balancing cylinder (42), and one end thereof extends out of the fixed seat (41); The two first piston members (44) slide symmetrically and sealingly in the balancing cylinder (42), and hydraulic oil is filled between the two; The two rotating rings (45) are symmetrically and sealingly rotatably connected to the balancing cylinder (42) and abut against the rotating end of the rotating mechanism (2), and the outer diameter of the rotating ring (45) is greater than the outer diameter of the balancing cylinder (42); The balancing cylinder (42) is divided into three sections by the two rotating rings (45), and sliding grooves (421) are circumferentially and uniformly arranged on the inner wall of each section. The sliding grooves (421) in the two sections at both ends are in limit sliding fit with the two first piston members (44); The four ends of the three-section balancing cylinder (42) connected to the two rotating rings (45) respectively have the same structure. Inner ring cavities (422) and outer ring cavities (423) are concentrically arranged on the four ends, and a plurality of through holes (424) are circumferentially and uniformly arranged between the inner ring cavities (422) and the outer ring cavities (423); An outer side sealing ring (425) is hermetically embedded in the outer ring cavity (423), and the outer side sealing ring (425) is arranged in a U shape, and its open end faces the through hole (424); A buffer mechanism (5) is arranged between the two first piston members (44), and the buffer mechanism (5) includes: A fixed disk (51), the fixed disk (51) is coaxially fixed to the balancing cylinder (42), the fixed disk (51) is in sealing fit with the shaft rod (43) and is coupled with the shaft rod (43); Two second piston members (52), the two second piston members (52) slide sealingly in the balancing cylinder (42), and compressible gas is filled between the two; Distance sensors are embedded on the two end faces of the fixed disk (51) for monitoring the distance between the two second piston members (52) relative to the fixed disk (51); A plurality of through holes are circumferentially distributed on the fixed disk (51) for communicating the spaces between the two second piston members (52); The second piston member (52) and the slide groove (421) on the inner wall of the balancing cylinder (42) located in the middle section are in limited sliding cooperation.

2. A fire protection pipe connector cutting device as claimed in claim 1, characterized in that: A dirt collecting hopper (12) is provided in the chassis (1); the dirt collecting hopper (12) is mounted on the bottom sides of the rotating mechanism (2) and the cutting mechanism (3) and is used to collect cutting debris.

3. A fire protection pipe connector cutting device as claimed in claim 1, characterized in that: The rotating mechanism (2) comprises: A rotating shaft (21), the rotating shaft (21) being the rotating end of the rotating mechanism (2), the rotating shaft (21) being rotatably sleeved on the balancing cylinder (42) and being in sealing contact with the two rotating rings (45); Two support seats (22), the two support seats (22) are respectively fixed to the bracket and symmetrically sleeved on the rotating shaft (21), and a ball bearing (221) is fixedly connected between the two support seats (22) and the rotating shaft (21) to adapt the rotating shaft (21) to rotate on the support seats (22); A driving motor (23), the driving motor (23) being fixedly connected to the bracket and driving the rotating shaft (21) to rotate on the supporting seat (22) via a pulley assembly (231); A three-jaw chuck (24) is coaxially fixed to an end of the rotating shaft (21) away from the fixing seat (41) via a connecting flange (241) and is used to fix the connecting piece.

4. A fire protection pipe connector cutting device as claimed in claim 1, characterized in that: The cutting mechanism (3) comprises: A dual-axis displacement component (31), the dual-axis displacement component (31) being mounted on the bracket; A cutting disc (32), the cutting disc (32) being mounted on the dual-axis displacement assembly (31); A cutting power component (33), the cutting power component (33) being mounted on the dual-axis displacement assembly (31) and used to provide rotational power to the cutting disc (32).

5. A fire protection pipe connector cutting device as claimed in claim 1, characterized in that: The part of the shaft rod (43) located inside the balancing cylinder (42) has two external threaded portions (431) symmetrically arranged on its side wall.

6. A fire protection pipe connector cutting device as claimed in claim 5, characterized in that: A threaded ring (441) is coaxially fixedly connected to each of the two first piston members (44), and the threaded ring (441) and the external threaded portion (431) are threadably matched; A sealing tube (442) is symmetrically fixedly connected to one end of the two threaded rings (441) that are close to each other. The sealing tube (442) is sealingly sleeved on the shaft rod (43) and coupled to the shaft rod (43).

7. A fire protection pipe connector cutting device as claimed in claim 1, characterized in that: Two side rings (451) are symmetrically fixedly connected to the two end surfaces of the rotating ring (45), and the side walls of the side rings (451) are sealingly slidably matched with the inner wall of the balancing cylinder (42); A first recessed portion (452) is coaxially arranged on the side wall of the rotating ring (45), and a pressurized rubber ring (454) is sealed and embedded in the first recessed portion (452); A second recessed portion (453) is coaxially arranged on the side walls of the two side rings (451), and an inner sealing ring (455) is sealingly embedded in the second recessed portion (453).

8. A fire protection pipe connector cutting device as claimed in claim 7, characterized in that: An annular groove corresponding to the first recessed portion (452) is coaxially arranged on the inner side of the rotating ring (45); A plurality of first radial through holes (456) are evenly arranged circumferentially on the first recessed portion (452), and the plurality of first radial through holes (456) are connected to the first recessed portion (452) and the annular groove; A plurality of second radial through holes (457) are evenly arranged circumferentially on the second recessed portion (453); A plurality of axial through holes (458) are evenly arranged in the circumferential direction on the two end surfaces of the annular groove.

9. A fire protection pipe connector cutting device as claimed in claim 8, characterized in that: The plurality of axial through holes (458) on the same side are connected to the inner annular cavity (422) on the side close to the same side.

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