CN113828866A

CN113828866A - Cutting device

Info

Publication number: CN113828866A
Application number: CN202111109482.0A
Authority: CN
Inventors: 常松; 龙晓斌; 马军; 闵玉龙; 彭松贤; 陈明
Original assignee: Weilan Co ltd; China Nuclear Power Operation Co Ltd
Current assignee: Weilan Co ltd; China Nuclear Power Operation Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2021-12-24

Abstract

The present invention relates to a cutting device. The cutting device includes: a cutting knife set; the guide ring is provided with a sleeving opening and is arranged at the cutting position of the valve through the sleeving opening; the cutting knife group is arranged on the guide ring; the transmission mechanism is in transmission connection with the guide ring, drives the guide ring to rotate around the axis of the guide ring and drives the cutting knife group to rotate; the driving piece is connected to the power input end of the transmission mechanism. According to the cutting device provided by the invention, the driving piece is matched with the transmission mechanism to drive the guide ring to rotate circumferentially, and the guide ring drives the cutting knife set to rotate circumferentially synchronously so as to perform cutting operation, so that the cutting efficiency is improved, and the cutting time is shortened. And the feeding amount and the cutting acting force are basically uniform during each cutting, so that the precise cutting can be realized, and the cutting quality is improved.

Description

Cutting device

Technical Field

The invention relates to the technical field of nuclear power cutting, in particular to a cutting device.

Background

In a stop valve used in a nuclear power plant, a valve body and a valve cover lip are welded and fixed, a welding position needs to be cut every time disassembly inspection or maintenance is carried out, and then the valve body and the valve cover lip are reassembled and welded again by using wire welding. The existing common handsaws cut, and then this way results in a long cutting time, and the cutting position, the cutting depth and the cutting flatness cannot be controlled well, and the risk of damaging the valve rod is accompanied. Even if the later stage has to improve to the handsaw, forms comparatively quick accurate cutting means, still need the operating personnel manual cutting, the operation needs to have the skill moreover.

Disclosure of Invention

Therefore, it is necessary to provide a cutting device for solving the technical problems of inconvenient cutting operation, long time consumption and low cutting quality when cutting the valve body and the valve cover in the prior art.

A cutting device, comprising:

a cutting knife set;

the guide ring is provided with a sleeving opening and is arranged at the cutting position of the valve through the sleeving opening; the cutting knife group is arranged on the guide ring;

the transmission mechanism is in transmission connection with the guide ring, drives the guide ring to rotate around the axis of the guide ring and drives the cutting knife group to rotate;

the driving piece is connected to the power input end of the transmission mechanism.

In one embodiment, the outer side wall of the guide ring is provided with a first tooth structure;

the transmission mechanism comprises a transmission shaft, a second tooth structure is arranged on the outer side of the transmission shaft, and the first tooth structure and the second tooth structure are in meshing transmission.

In one embodiment, the guide ring comprises at least two clamping blocks which are arranged around the circumferential direction, any adjacent clamping blocks are detachably connected, and the outer side of each clamping block is provided with the first tooth structure.

In one embodiment, the number of the clamping blocks is two, each clamping block is arranged in a semicircular shape, and each clamping block is provided with an installation avoidance hole;

the guide ring further comprises a fastener, the two clamping blocks are buckled, and the fastener penetrates through each clamping block to correspond to the mounting avoidance hole.

In one embodiment, the transmission mechanism further includes a frame, the frame has a transmission cavity, the transmission shaft is accommodated in the transmission cavity, the transmission shaft is rotatably connected to the frame, the driving member is mounted on the frame, and the frame is used for connecting with a valve pipeline.

In one embodiment, the frame has an extension arm extending towards one side of the guide ring, the extension arm being configured with a guide channel, the guide ring being provided with a guide rail along at least one side of its axis, the guide rail being slidably connected with the guide channel.

In one embodiment, the cutter assembly includes a scraper blade and a cutter blade, the scraper blade and the cutter blade being disposed circumferentially around the guide ring.

In one embodiment, the distance between the cutting edge of the cutting knife and the axis of the guide ring is a first length, the distance between the cutting edge of the scraper and the axis of the guide ring is a second length, and the first length is smaller than the second length.

In one embodiment, the included angle between the axis of the cutter blade and the axis of the scraper blade is between 38 and 42 degrees.

In one embodiment, the cutting knife and/or the scraper comprise a blade, a knife sleeve, an adjusting column and an elastic piece;

the knife sleeve is provided with a mounting cavity, the elastic piece is accommodated in the mounting cavity, and the blade is inserted into the knife sleeve and abuts against one end of the elastic piece; the adjusting column is connected to one end, deviating from the blade, of the knife sleeve, and the adjusting column drives the knife sleeve to move along the axial direction of the adjusting column.

The invention has the beneficial effects that:

the invention provides a cutting device which comprises a cutting knife group, a guide ring, a transmission mechanism and a driving piece. The guide ring is provided with a sleeving opening so that the guide ring is sleeved at the cutting position of the valve through the sleeving opening. The cutting knife group is arranged on the guide ring. The driving piece drives the guide ring to rotate around the axis of the guide ring through the transmission mechanism, and drives the cutting knife group to synchronously rotate. That is to say, the cutting device provided by the invention adopts the matching of the driving piece and the transmission mechanism to drive the guide ring to rotate circumferentially, and the guide ring drives the cutting knife group to rotate circumferentially synchronously so as to perform cutting operation. Compared with the existing manual cutting, the driving mode of the guide ring is convenient in cutting operation, the cutting efficiency is improved, and the cutting time is shortened. And the feeding amount and the cutting acting force are basically uniform during each cutting, so that the precise cutting can be realized, and the cutting quality is improved.

Drawings

Fig. 1 is a schematic view of a cutting device according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of the cutting apparatus provided in FIG. 1;

FIG. 3 is a schematic inner plan view of a guide ring in the cutting device provided in FIG. 2;

fig. 4 is a schematic view of a cutting blade or scraper in the cutting device provided in fig. 1.

Reference numerals: 10-a cutting knife set; 11-a cutting knife; 12-a scraper; 20-a guide ring; 21-a clamping block; 30-a transmission mechanism; 31-a drive shaft; 32-a frame; 40-a driver; 50-valve cutting; 101-a blade; 102-a knife sleeve; 103-a conditioning column; 104-a resilient member; 201-a suit port; 202-a first tooth structure; 311-a second tooth structure; 321-a connecting plate; 322-a first side panel; 323-a second side panel; 3211-extension arm; 3212-observation port.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 to 3, a cutting device according to an embodiment of the present invention includes a cutter unit 10, a guide ring 20, a transmission mechanism 30, and a driving member 40. The guide ring 20 is provided with a sleeving opening 201, the guide ring 20 is arranged at the valve cutting position 50 through the sleeving opening 201, and the cutting knife group 10 is arranged on the guide ring 20. The driving member 40 is connected to a power input end of the transmission mechanism 30, and the transmission mechanism 30 is in transmission connection with the guide ring 20 so as to enable the guide ring 20 to rotate around an axis of the guide ring 20 to drive the cutting knife assembly 10 to rotate.

In actual use, the guide ring 20 is sleeved on the valve cutting part 50 (i.e. the lip welding part of the valve body and the valve cover) by using the sleeving opening 201 on the guide ring 20. The driving member 40 is started, the power output shaft of the driving member 40 is in transmission connection with the transmission mechanism 30 so as to drive the guide ring 20 to make circular motion through the transmission mechanism 30, and the cutting knife group 10 installed on the guide ring 20 makes circular motion synchronously with the guide ring 20, thereby acting on the welding position of the valve body and the valve cover lip inside the guide ring 20 to perform cutting. Compared with the prior art that the cutting is performed manually, the cutting device provided by the invention utilizes the driving member 40 to provide power, and drives the guide ring 20 to rotate through the transmission mechanism 30, so as to drive the cutting knife assembly 10 to move for cutting. All need not the manual work at whole cutting process and exert external force, just because the setting of driving piece 40 replaces artifically moreover, the control cutting feed rate and the cutting effort of being more convenient for to improve the cutting quality. Moreover, the arrangement of the driving member 40 and the transmission mechanism 30 improves the cutting efficiency and shortens the cutting time.

Wherein suitable guide rings 20 can be selected for different diameters.

In one embodiment, the driving member 40 is a motor, and a motor shaft of the motor is in transmission connection with a power input end of the transmission mechanism 30. The motor-driven mode has higher driving accuracy and convenient speed regulation, and further improves the use convenience of the cutting device. Meanwhile, a reduction gear structure is further provided between the motor and the transmission mechanism 30 for more stable cutting.

As shown in fig. 1-3, in some embodiments, the outer sidewall of the guide ring 20 is provided with a first tooth structure 202; the transmission mechanism 30 comprises a transmission shaft 31, a second tooth structure 311 is arranged on the outer side of the transmission shaft 31, and the first tooth structure 202 and the second tooth structure 311 are in meshing transmission. Specifically, the driving shaft of the driving member 40 is in transmission connection with the transmission shaft 31 so as to drive the transmission shaft 31 to rotate around the axis of the transmission shaft 31, and the transmission shaft 31 performs power transmission with the guide ring 20 through the second tooth structure 311 and the first tooth structure 202, so as to realize circumferential rotation of the guide ring 20. In a specific embodiment, the transmission shaft 31 is a screw rod, and one end of the screw rod facing the driving shaft is provided with a shaft hole, so that the end of the driving shaft can be inserted into the shaft hole and is in key connection with the wall of the shaft hole. The motor drives the screw rod to rotate, and the screw rod is in meshing transmission with the teeth of the guide ring 20. Wherein the rotation direction of the second tooth structure 311 on the screw has an influence on the rotation direction of the guide ring 20, for example, a left rotation causes the guide ring 20 to rotate clockwise, and a right rotation causes the guide ring 20 to rotate counterclockwise. Meanwhile, the motor can only rotate in the forward direction and can not rotate in the reverse direction, so that the transmission shaft 31 can only rotate in the single direction, and further the guide ring 20 can only rotate in the reverse direction. This arrangement provides protection for the cutter assembly 10 mounted in the guide ring 20 to ensure that no chipping or breaking of the blade 101 occurs. In other embodiments, the transmission mechanism includes a gear shaft drivingly connected to the motor shaft of the motor and a gear structure connected to the gear shaft, and the teeth of the gear structure are the second tooth structure 311 described above. At the moment, the motor drives the gear structure to rotate, and the gear structure and the guide ring are in meshing transmission through the tooth structure. Wherein, utilize the coupling joint between motor shaft and the gear shaft, improve the stability of moment of torsion transmission.

In yet another embodiment, as shown in fig. 1-3, the guide ring 20 is a circular ring structure, the inner ring of the guide ring 20 forms the above-mentioned nesting opening 201, and the outer ring sidewall of the guide ring 20 is provided with a first tooth structure 202. The guide ring 20 has an annular cavity divided into a plurality of mounting portions, and the cutting blade assembly 10 is mounted in the annular cavity. Meanwhile, a guide roller is also arranged in the annular cavity body.

As shown in fig. 1 to 3, in some embodiments, the guide ring 20 includes at least two clamping blocks 21 arranged around the circumference, and any adjacent clamping blocks 21 are detachably connected to each other, and the outer side of each clamping block 21 has a first tooth structure 202. Specifically, the inward side of each clamping piece 21 has a circular arc surface, so that when a plurality of clamping pieces 21 are spliced to form the guide ring 20, an annular sleeving opening 201 is formed. The outer side walls of any two adjacent clamping blocks 21 are provided with mounting openings, and fasteners such as countersunk screws penetrate through the mounting openings to fix the two clamping blocks 21. In a specific embodiment, the clamping blocks 21 are arranged in an arc structure, but the clamping blocks 21 may be arranged in a structure with a top angle and a circular arc surface as long as a plurality of clamping blocks 21 can be spliced to form the finished guide ring 20.

As shown in fig. 1 to 3, in some embodiments, the number of the clamping blocks 21 is two, each of the clamping blocks 21 is disposed in a semicircular shape, and the clamping blocks 21 have installation avoiding holes; the guide ring 20 further includes a fastening member, the two clamping blocks 21 are fastened, and the fastening member passes through the corresponding installation avoiding hole of each clamping block 21 to be fixed. Specifically, each clamping block 21 is disposed in a half arc shape, the two clamping blocks 21 are fastened to the valve body and the lip of the valve cover, and then the two clamping blocks 21 are fixed by a fastener. The fastener adopts countersunk head screw. The first tooth structures 202 on the two clamping blocks 21 can be combined continuously to form a complete tooth structure. In another embodiment, a mounting hole is provided at an axial end face of each clamping block 21, and then any two adjacent clamping blocks 21 are fixed by a fastener such as a snap or a clamp. At this time, the circumferential side wall of the clamp block 21 is free of the mounting hole, ensuring continuity of the first tooth structure 202.

As shown in fig. 1, in some embodiments, the transmission mechanism 30 further includes a frame 32, the frame 32 has a transmission cavity, the transmission shaft 31 is accommodated in the transmission cavity, the transmission shaft 31 is rotatably connected to the frame 32, the driving member 40 is mounted to the frame 32, and the frame 32 is used for connecting with the valve pipeline. Specifically, the transmission cavity is provided with the rotation hole respectively along the axial both ends of transmission shaft 31, rotates hole and transmission cavity intercommunication, and the both ends of transmission shaft 31 all rotate with the pore wall that rotates the hole and be connected, and the drive shaft transmission of one end and driving piece 40 of transmission shaft 31 is connected. The driving member 40 is mounted on the frame 32 to form a complete structure with the transmission mechanism 30. Wherein, the side of the frame 32 facing the guide ring 20 has an opening so that the guide ring 20 can be engaged with the transmission shaft 31 for transmission.

As shown in fig. 1, in a specific embodiment, the frame 32 includes two connecting plates 321 disposed opposite to each other and spaced apart from each other in the thickness direction of the guide ring 20, and three side plates disposed between the two connecting plates 321, the three side plates (i.e., a first side plate 322 and a second side plate 323) are joined together in a U-shape, wherein the two first side plates 322 are disposed opposite to each other and spaced apart from each other along the axis of the transmission shaft 31, the second side plate 323 is disposed between the two opposite first side plates 322 and opposite to the guide ring 20, and the opening is disposed on the opposite side of the second side plate 323. The two opposite first side plates 322 are provided with a rotation hole, and the driving member 40 is connected to one of the first side plates 322. In yet another embodiment, the driving member 40 has a mounting shell that is fixed to the first side plate 322, so as to mount the driving member 40 relative to the frame 32. Wherein, the connecting plate 321 is provided with a viewing port 3212 to facilitate viewing the engagement condition of the transmission shaft 31 and the guide ring 20.

As shown in fig. 1, in some embodiments, the frame 32 has an extension arm 3211 extending toward one side of the guide ring 20, the extension arm 3211 being configured with a channel, the guide ring 20 being provided with a rail along at least one side of its axis, the rail being slidably connected with the channel. Specifically, the two connecting plates 321 extend towards one side close to the guide ring 20, and are configured into an extension arm 3211, and the extension arm 3211 is provided with an arc groove to facilitate avoiding the valve body and the valve cover lip. Meanwhile, the two connecting plates 321 are respectively disposed at two axial sides of the guide ring 20, and each connecting plate 321 is provided with a guide groove along one side of the guide ring 20 in the axial direction. Correspondingly, the edge of the inner ring of the guide ring 20 is provided with a guide rail protruding from the axial end face of the guide ring 20, and the guide rail can be slidably connected in the guide groove, so that the frame 32 can be assembled with respect to the guide ring 20. In one embodiment, the guide slot is a T-shaped slot, an L-shaped slot, a dovetail slot, etc., and the guide rail is a T-shaped slot, an L-shaped slot, a dovetail slot, etc., as long as the mounting and the movable connection between the frame 32 and the guide ring 20 can be achieved.

As shown in fig. 2 and 4, in some embodiments, the cutter assembly 10 includes a blade 12 and a cutter 11, the blade 12 and cutter 11 being disposed circumferentially around the guide ring 20. Specifically, the cutter group 10 in the cutting device provided in the present embodiment has two functions, one is a cutter 11 for cutting, and the other is a scraper 12 for scraping burrs. The cutting knife 11 is used for cutting off the welding position of the valve body and the lip edge of the valve cover, and then the scraping knife 12 is used for trimming burrs at the cutting position to ensure that the port is smooth and flat. The circumferential cutting arrangement of the scraper 12 and the cutter 11 ensures that the two do not interfere, thereby improving the processing quality. Wherein, the scraper 12 and the cutting knife 11 are both fixedly arranged relative to the guide ring 20. At this time, when the guide ring 20 is rotated by the driving shaft 31, the scraper 12 and the cutter 11 can be driven to rotate to realize cutting at the cutting position.

As shown in fig. 2, in some embodiments, the distance between the cutting edge of the cutting blade 11 and the axis of the guide ring 20 is a first length, and the distance between the cutting edge of the scraper blade 12 and the axis of the guide ring 20 is a second length, and the first length is smaller than the second length. That is, the scraper 12 is located slightly away from the bonnet lip as compared to the shear 11, thereby ensuring that the scraper 12 does not cause cutting interference when the shear 11 is cutting.

In some embodiments, the angle between the axis of the cutting blade 11 and the axis of the blade 12 is between 38 and 42 degrees, as shown in fig. 2. Due to the arrangement, the cutting knife 11 and the scraper 12 are located in the optimal angle range, so that interference between the cutting knife 11 and the scraper 12 is avoided, cutting quality is improved, scraping quality is improved, and a cutting surface is ensured to be flat. Preferably, the angle between the cutting blade 11 and the scraper blade 12 is 40 degrees.

As shown in fig. 4, in some embodiments, the cutting blade 11 and/or the doctor blade 12 includes a blade 101, a sleeve 102, an adjustment post 103, and a resilient member 104; the knife sleeve 102 is provided with a mounting cavity, the elastic piece 104 is accommodated in the mounting cavity, and the blade 101 is inserted into the knife sleeve 102 and abuts against one end of the elastic piece 104; the adjusting column 103 is connected to an end of the knife pouch 102 away from the blade 101, and the adjusting column 103 drives the knife pouch 102 to move along the axial direction of the adjusting column 103.

Specifically, the adjusting column 103 is an adjusting screw. Taking the cutting knife 11 as an example, when the blade 101 is required to be close to the position to be cut, the adjusting screw is turned to urge the knife holder 102 to move toward the side close to the position to be cut. At this time, a knife holder is further included, the knife sleeve 102 is slidably connected to the knife holder, and the adjusting column 103 passes through the knife holder and abuts against one end of the knife sleeve 102, which is far away from the blade 101. The resilient member 104 (i.e., spring) is configured to provide a floating amount of the blade 101 relative to the location being cut so that the guide ring 20 will not damage the blade 101 when mounted relative to the valve body and bonnet lips. That is, in the cutting device provided in the present embodiment, the position of the knife pouch 102 can be adjusted by the arrangement of the adjustment column 103, so as to adjust the cutting thickness. Of course, the adjustment of the position of the scraper 12 is also realized by adjusting the position of the knife sleeve 102 through the setting of the adjusting column 103, so as to realize the scraping of the burr after cutting.

In conclusion, the cutting device provided by the invention replaces manual driving by a motor driving mode, is powerful in power, safe and reliable, reduces the labor intensity of field operators to the maximum extent, and shortens the processing time. Meanwhile, the transmission mode of driving the teeth to be meshed ensures more stable power transmission and longer service life. Moreover, the whole cutting device is designed in an integral structure, so that the cutting device has better structural rigidity, more than 80% of structures are made of copper materials, and the lightweight design is realized on the premise of meeting the strength. In addition, the annular guide ring 20 is adopted to realize rapid clamping work, and the excircle processing, the welding seam cutting and the cut-off groove finishing of the welding seam can be finished after one-time clamping, so that the operation practicability and the operation efficiency are further improved. The working current of the motor is adjustable, and when the cutting surface is not good, the rotating speed of the motor can be increased by inputting high current, so that cutting processing is realized. The section after cutting through this cutting device is even meticulous, the life of extension valve.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A cutting device, characterized in that it comprises:

a cutting knife set;

2. The cutting device of claim 1, wherein an outer side wall of the guide ring is provided with a first tooth structure;

3. The cutting device as claimed in claim 2, wherein the guide ring comprises at least two clamping blocks arranged around the circumference, any adjacent clamping blocks are detachably connected with each other, and the outer side of each clamping block is provided with the first tooth structure.

4. The cutting device according to claim 3, wherein the number of the clamping blocks is two, each clamping block is arranged in a semicircular shape, and the clamping blocks are provided with installation avoidance holes;

5. The cutting device as claimed in claim 2, wherein the drive mechanism further comprises a frame having a drive chamber, the drive shaft being received in the drive chamber and being rotatably connected to the frame, the drive member being mounted to the frame, the frame being adapted to be connected to a valve conduit.

6. The cutting device according to claim 5, characterized in that said frame has an extension arm extending towards one side of said guide ring, said extension arm being configured with a guide channel, said guide ring being provided along at least one side of its axis with a guide rail slidingly coupled with said guide channel.

7. A cutting device according to any one of claims 1-6, wherein the cutter group comprises a scraper and a cutter, which are arranged around the circumferential cut of the guide ring.

8. A cutting device according to claim 7, wherein the distance between the cutting edge of the cutting blade and the axis of the guide ring is a first length and the distance between the cutting edge of the scraper blade and the axis of the guide ring is a second length, the first length being smaller than the second length.

9. A cutting device according to claim 7, wherein the angle between the axis of the cutting blade and the axis of the blade is between 38 and 42 degrees.

10. The cutting device according to claim 7, wherein the cutting blade and/or the scraper comprises a blade, a sleeve, an adjustment post and a resilient member;