阅读说明：本技术 一种放射性固体废物封袋装置 (Radioactive solid waste bag sealing device ) 是由 来建良 郭湖兵 郎杰 于 2020-12-18 设计创作，主要内容包括：本发明属于核工业技术领域,具体是一种放射性固体废物封袋装置,包括撑开组件、移动组件、热封组件和剪切组件；撑开组件设置在第一手套箱内,热封组件和剪切组件均设置在第二手套箱内；第一手套箱和第二手套箱之间设有带密封盖的站口；撑开组件与移动组件连接；剪切组件设置在热封组件上,并随热封组件同步运动；热封组件沿水平方向和竖直方向移动,以对已放置有所述放射性固体废物的塑封袋的袋口处进行密封；剪切组件能够水平和竖直移动,以剪切密封好的塑封袋。本发明采用撑开组件对处于吸瘪状态的塑封袋进行撑袋,在热封时塑封袋不容易出现褶皱,防止放射性污染源的泄露,采用自动化操作,简化了操作流程。(The invention belongs to the technical field of nuclear industry, and particularly relates to a radioactive solid waste bag sealing device which comprises a propping component, a moving component, a heat sealing component and a shearing component; the opening assembly is arranged in the first glove box, and the heat sealing assembly and the shearing assembly are both arranged in the second glove box; a standing opening with a sealing cover is arranged between the first glove box and the second glove box; the strutting component is connected with the moving component; the shearing assembly is arranged on the heat sealing assembly and moves synchronously with the heat sealing assembly; the heat sealing assembly moves along the horizontal direction and the vertical direction so as to seal the bag mouth of the plastic packaging bag which is placed with the radioactive solid waste; the cutting assembly is capable of horizontal and vertical movement to cut the sealed plastic envelope. The plastic packaging bag in the shriveled state is subjected to bag opening by the opening assembly, the plastic packaging bag is not easy to wrinkle during heat sealing, the leakage of a radioactive pollution source is prevented, and the operation flow is simplified by adopting automatic operation.)

1. The radioactive solid waste bagging device is characterized by comprising a spreading component, a moving component, a heat sealing component and a shearing component;

the opening assembly is arranged in the first glove box, and the heat sealing assembly and the shearing assembly are both arranged in the second glove box;

a standing opening with a sealing cover is arranged between the first glove box and the second glove box;

the opening component is connected with the moving component and used for moving the opening component to the station port and opening the plastic package bag sleeved below the station port;

the shearing assembly is arranged on the heat sealing assembly and moves synchronously with the heat sealing assembly; the heat sealing assembly moves along the horizontal direction and the vertical direction so as to seal the bag mouth of the plastic packaging bag which is placed with the radioactive solid waste; the shearing assembly is capable of moving horizontally and vertically to shear the sealed plastic envelope.

2. The radioactive solid waste encapsulation device according to claim 1, wherein said spreader assembly comprises:

the fixing piece (101) is connected with the moving assembly and is used for fixing the expanding assembly on the moving assembly;

the bag supporting cylinder (102) is connected with the lower part of the fixing piece (101);

the connecting sleeve (103) is sleeved on the bag opening cylinder (102), the lower part of the connecting sleeve (103) is respectively hinged with one end of each of the two connecting rods (104), and the other end of each of the two connecting rods (104) is respectively hinged with the stay bar (105);

the connecting sleeve (103) is fixed on the upper part of the bag opening cylinder (102), the lower part of the bag opening cylinder (102) penetrates through the connecting sleeve (103) to be hinged with the support rod (105), and the support rod (105) is driven to expand and retract through the expansion of the bag opening cylinder (102).

3. The radioactive solid waste bagging apparatus of claim 1, wherein said moving assembly comprises:

the cantilever shaft electric cylinder (201) is connected with a cantilever shaft in the first glove box; the lower part of the cantilever shaft electric cylinder (201) is connected with an extension plate (202), and the extension plate (202) is connected with the distraction assembly;

the first driving unit is connected with the cantilever shaft electric cylinder (201) and used for driving the cantilever shaft electric cylinder (201) to move so as to drive the opening component to move in the first glove box.

4. The radioactive solid waste bagging apparatus of claim 1, wherein said heat sealing assembly comprises:

the Z-axis sliding block (301) is connected with the mounting bracket (5) in a sliding mode and slides in the vertical direction along the mounting bracket (5); two X-axis sliding blocks (302) are arranged on the Z-axis sliding block (301); the X-axis sliding block (302) slides along the Z-axis sliding block (301) in the horizontal direction;

a first heat sealer bottom plate (303) is arranged on one X-axis sliding block (302), the first heat sealer bottom plate (303) is connected with one end of a heat seal strip pressing block (304), and a heat seal strip is fixed on the heat seal strip pressing block (304);

a second heat sealing machine bottom plate (305) is arranged on the other X-axis sliding block (302), the second heat sealing machine bottom plate (305) is connected with a heat sealing clamping plate (306), and a silica gel strip (307) is arranged on the heat sealing clamping plate (306) at a position corresponding to a heat sealing strip on the heat sealing strip pressing block (304);

the first heat sealing machine bottom plate (303) and the second heat sealing machine bottom plate (305) slide inwards or outwards simultaneously along with the two X-axis sliding blocks (302) on the Z-axis sliding block (301) so as to seal the expanded plastic package bag.

5. The radioactive solid waste bagging apparatus of claim 4, wherein said shearing assembly comprises:

a shearing bracket (401) fixed on the first heat sealer base plate (303), and a rodless cylinder (402) fixed on the shearing bracket (401); the rodless cylinder (402) is connected with the shearing cylinder (403), the rodless cylinder (402) is driven to extend and retract through the stretching of the shearing cylinder (403), a circular cutter (404) is arranged on the rodless cylinder (402), and the circular cutter (404) moves on the rodless cylinder (402) in the direction perpendicular to the X-axis sliding block (302) and the Z-axis sliding block (301) and is used for cutting off the sealed plastic packaging bag.

6. The radioactive solid waste bagging apparatus according to claim 4, wherein a ball screw (501) is provided in the middle of the mounting bracket (5), the ball screw (501) is connected to the second power unit at the lower portion of the mounting bracket (5), and Z-axis guide rails (502) are provided on the left and right sides of the mounting bracket (5) for cooperating with the Z-axis slider (301) to slide the Z-axis slider (301) on the mounting bracket (5).

7. The radioactive solid waste bagging apparatus according to claim 4, wherein a trapezoidal lead screw (308) is disposed in the middle of the Z-axis slider (301), the trapezoidal lead screw (308) is connected to a third power unit mounted at one end of the Z-axis slider (301), and X-axis guide rails (309) are disposed on the upper and lower sides of the Z-axis slider (301) and are used for being matched with the X-axis slider (302) to enable the X-axis slider (302) to slide on the Z-axis slider (301).

8. The radioactive solid waste bagging apparatus according to claim 5, wherein the rodless cylinder (402) is connected to the shearing cylinder (403) through a rodless cylinder mounting plate (405), the lower portion of the rodless cylinder mounting plate (405) is connected to the pressing plate (407) through a spring shaft mounting seat (406), the shearing cylinder (403) drives the rodless cylinder mounting plate (405) to move, and further drives the circular cutter (404) and the pressing plate (407) on the rodless cylinder (402) to move synchronously, and when the circular cutter (404) shears the plastic bag, the pressing plate (407) is used for pressing the plastic bag at the lower portion of the shearing portion.

9. The radioactive solid waste bagging apparatus according to claim 8, wherein the shearing assembly further comprises a guide shaft (408), the guide shaft (408) passing through the shearing bracket (401) to be connected to the rodless cylinder mounting plate (405) for guiding the rodless cylinder (402).

10. The radioactive solid waste bagging apparatus according to claim 5, wherein the heat seal bar pressing block (304) is disposed inside the first heat sealer base (303), and the shearing frame (401) is disposed outside the first heat sealer base (303).

Technical Field

The invention belongs to the technical field of nuclear industry, and particularly relates to a radioactive solid waste bag sealing device.

Background

Radioactive solid waste is a substance that contains or is contaminated with radionuclides, whose concentration or specific activity is greater than the level of cleanliness regulations prescribed by the national regulatory authorities, and is expected to be no longer utilized.

At present, in the technical field of nuclear industry, the transfer-out of the solid waste in the traditional glove box usually adopts a bag sealing in-out mode, and comprises the following four steps: (1) manually filling radioactive solid waste into polyethylene bags; (2) pulling radioactive solid waste placed in a polyethylene bag out of the glove box; (3) carrying out heat seal three rows; (4) cut along the middle of the second row of heat-seal seams. The traditional bag sealing adopts manual operation, the operation process is complex, and high-radiation solid waste cannot be treated. Since the inside of the glove box is in a negative pressure state, wherein the bagging, heat sealing and cutting of the article are all performed in a negative pressure state. Under the negative pressure state, the polyethylene bag is in the state of inhaling flat, appears the fold easily when the heat-seal, makes the radioactive substance in the polyethylene bag reveal, and the polluted environment causes radiation injury to the staff.

Disclosure of Invention

Technical problem to be solved

In order to solve the technical problem, the invention provides a radioactive solid waste bagging device.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

a radioactive solid waste bagging device comprises a spreading component, a moving component, a heat sealing component and a shearing component; the opening assembly is arranged in the first glove box, and the heat sealing assembly and the shearing assembly are both arranged in the second glove box; a standing opening with a sealing cover is arranged between the first glove box and the second glove box; the opening component is connected with the moving component and used for moving the opening component to the station port and opening the plastic package bag sleeved below the station port; the shearing assembly is arranged on the heat sealing assembly and moves synchronously with the heat sealing assembly; the heat sealing assembly moves along the horizontal direction and the vertical direction so as to seal the bag opening of the plastic packaging bag with the radioactive solid waste; the cutting assembly is capable of horizontal and vertical movement to cut the sealed plastic envelope.

Optionally, the distraction assembly comprises: the fixing piece is connected with the moving assembly and is used for fixing the propping assembly on the moving assembly; the bag supporting cylinder is connected with the lower part of the fixing piece; the connecting sleeve is sleeved on the bag supporting cylinder, the lower part of the connecting sleeve is respectively hinged with one end of each of the two connecting rods, and the other end of each of the two connecting rods is respectively hinged with the supporting rod; the connecting sleeve is fixed on the upper part of the bag opening cylinder, the lower part of the bag opening cylinder penetrates through the connecting sleeve to be hinged with the support rod, and the support rod is driven to expand and retract through the expansion of the bag opening cylinder.

Optionally, the moving assembly comprises: the cantilever shaft electric cylinder is connected with a cantilever shaft in the first glove box; the lower part of the cantilever shaft electric cylinder is connected with an extension plate, and the extension plate is connected with the strutting assembly; the first driving unit is connected with the cantilever shaft electric cylinder and used for driving the cantilever shaft electric cylinder to move so as to drive the strutting assembly to move in the first glove box.

Optionally, the heat seal assembly comprises: the Z-axis sliding block is connected with the mounting bracket in a sliding manner and slides in the vertical direction along the mounting bracket; two X-axis sliding blocks are arranged on the Z-axis sliding block; the X-axis sliding block slides along the Z-axis sliding block in the horizontal direction; a first heat sealing machine bottom plate is arranged on one X-axis sliding block and connected with one end of a heat sealing strip pressing block, and a heat sealing strip is fixed on the heat sealing strip pressing block; and a second heat sealing machine bottom plate is arranged on the other X-axis sliding block and is connected with a heat sealing clamping plate, and the first heat sealing machine bottom plate and the second heat sealing machine bottom plate slide inwards or outwards simultaneously along with the two X-axis sliding blocks on the Z-axis sliding block simultaneously so as to seal the plastic packaging bag after being spread.

Optionally, the shear assembly comprises: the cutting support is fixed on the bottom plate of the first heat sealing machine, the rodless cylinder is fixed on the cutting support and connected with the cutting cylinder, the rodless cylinder is driven to stretch out and retract through the stretching of the cutting cylinder, the disc cutter is arranged on the rodless cylinder, and the disc cutter moves on the rodless cylinder in the direction perpendicular to the X-axis sliding block and the Z-axis sliding block and is used for cutting off a sealed plastic packaging bag.

Optionally, a ball screw is arranged in the middle of the mounting bracket, the ball screw is connected with a second power unit on the lower portion of the mounting bracket, and Z-axis guide rails are arranged on the left side and the right side of the mounting bracket and used for being matched with the Z-axis sliding block to enable the Z-axis sliding block to slide on the mounting bracket.

Optionally, a trapezoidal lead screw is arranged in the middle of the Z-axis slider and connected with a third power unit arranged at one end of the Z-axis slider, and X-axis guide rails are arranged on the upper side and the lower side of the Z-axis slider and used for being matched with the X-axis slider to enable the X-axis slider to slide on the Z-axis slider.

Optionally, the rodless cylinder is connected with the shearing cylinder through a rodless cylinder mounting plate, the lower portion of the rodless cylinder mounting plate is connected with the pressing plate through a spring shaft, the shearing cylinder drives the rodless cylinder mounting plate to move, and further drives a circular cutter and the pressing plate on the rodless cylinder to move synchronously, and when the circular cutter shears the plastic package bag, the pressing plate is used for pressing the plastic package bag at the lower portion of the shearing part.

Optionally, the shearing assembly further comprises a guide shaft, the guide shaft penetrates through the shearing support to be connected with the rodless cylinder mounting plate and used for guiding the rodless cylinder.

Alternatively, the heat-seal bar pressing block is disposed on the inner side of the first heat-seal machine base plate, and the shearing support is disposed on the outer side of the first heat-seal machine base plate.

(III) advantageous effects

The invention has the beneficial effects that: the invention provides a radioactive solid waste bag sealing device, which adopts a spreading assembly arranged in a first glove box with a radioactive pollution source to spread a plastic bag in a shriveled state, on one hand, the plastic bag is not easy to wrinkle during heat sealing, and the leakage of the radioactive pollution source is prevented, on the other hand, the automatic bag spreading, heat sealing and shearing operations are adopted, so that the operation flow is simplified, and high-radioactivity materials can be processed. According to the invention, the heat-sealing assembly and the shearing assembly which are arranged in the second glove box without the radioactive pollution source are adopted, three lines are heat-sealed after the plastic package bag is spread, and then the plastic package bag is sheared from the middle line, so that the radioactive pollution source in the first glove box is prevented from entering the second glove box, and the operating environment in the second glove box is always kept without the radioactive pollution source.

Drawings

Fig. 1 is a schematic perspective view of a spreading assembly of a radioactive solid waste bagging apparatus according to the present invention.

Fig. 2 is a front view schematically showing the structure of a heat sealing assembly of a radioactive solid waste envelope device according to the present invention.

Fig. 3 is a perspective view of a heat sealing assembly of a radioactive solid waste envelope device according to the present invention.

Fig. 4 is a schematic perspective view of a shearing assembly of the radioactive solid waste bagging apparatus according to the present invention.

[ description of reference ]

101. A fixing member; 102. a bag opening cylinder; 103. connecting sleeves; 104. a connecting rod; 105. a stay bar; 106. a pin shaft; 107. positioning a plate; 108. a support plate; 109. a vertical rod;

201. a cantilever shaft electric cylinder; 202. an extension plate; 203. a first servo motor; 204. a first speed reducer; 205. a transfer seat; 206. a fixing plate;

301. a Z-axis slide block; 302. an X-axis slider; 303. a first hot air blower base plate; 304. a heat seal bar pressing block; 305. a second hot air blower base plate; 306. heat-sealing the clamping plate; 307. a silica gel strip; 308. a trapezoidal lead screw; 309. an X-axis guide rail; 310. a third servo motor; 311. a commutator;

401. shearing a bracket; 402. a rodless cylinder; 403. a shearing cylinder; 404. a cutter disk; 405. a rodless cylinder mounting plate; 406. a spring shaft mounting seat; 407. pressing a plate; 408. a guide shaft; 409. a linear bearing; 410. a spring shaft; 411. a rodless cylinder mount; 412. a cutting disk mounting seat; 413. a compression spring; 414. a guide bar;

5. mounting a bracket; 501. a ball screw; 502. a Z-axis guide rail; 503. a second servo motor; 504. and a second speed reducer.

Detailed Description

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Example (b): referring to fig. 1-4, a radioactive solid waste bagging apparatus includes a spreader assembly, a moving assembly, a heat sealing assembly, and a shearing assembly; the expanding component is arranged in a first glove box with a pollution source, and the heat sealing component and the shearing component are both arranged in a second glove box without the pollution source; a standing opening with a sealing cover is arranged between the first glove box and the second glove box; the opening component is connected with the moving component and used for moving the opening component to the station port and opening the plastic package bag sleeved below the station port; the shearing assembly is arranged on the heat sealing assembly and moves synchronously with the heat sealing assembly; the heat sealing assembly can move horizontally and vertically to seal the plastic packaging bag; the cutting assembly is capable of horizontal and vertical movement to cut the sealed plastic envelope.

The plastic packaging bag in the shriveled state is stretched by the stretching assembly arranged in the first glove box with the radioactive pollution source, so that on one hand, the interior of the plastic packaging bag with the radioactive pollution source can be sealed, the plastic packaging bag is not easy to wrinkle during heat sealing, leakage of the radioactive pollution source is prevented, on the other hand, automatic bag stretching, heat sealing and shearing operations are adopted, the operation flow is simplified, and high-radioactivity materials can be processed. According to the invention, the heat-sealing assembly and the shearing assembly which are arranged in the second glove box without the radioactive pollution source are adopted, three lines are heat-sealed after the plastic package bag is spread, and then the plastic package bag is sheared from the middle line, so that the radioactive pollution source in the first glove box is prevented from entering the second glove box, and the operating environment in the second glove box is always kept without the radioactive pollution source.

Further, referring to fig. 1, the distracting assembly of the present invention comprises: the fixing piece 101 is connected with the lower part of the moving component and is used for fixing the expanding component on the moving component; the lower part of the fixing piece 101 is connected with a bag opening cylinder 102; the bag opening cylinder 102 is sleeved with a connecting sleeve 103, the upper part of the connecting sleeve 103 is fixed on the bag opening cylinder 102 through a positioning plate 107, the lower part of the connecting sleeve 103 is respectively hinged with one end of each of the two connecting rods 104 through a support plate 108, and the other end of each of the two connecting rods 104 is respectively hinged with a support rod 105 through a pin 106. The connecting sleeve 103 is fixed on the upper part of the bag opening cylinder 102, the lower part of the bag opening cylinder 102 penetrates through the connecting sleeve 103 to be connected with the vertical rod 109, the lower part of the vertical rod 109 is hinged with the support rod 105 through the pin shaft 106, and the support rod 105 is driven to expand and retract through the expansion of the bag opening cylinder 102. The opening assembly of the present invention is not limited to the above structure, and the bag opening cylinder 102 may be a hydraulic cylinder, and the pin 106 may be a hinge.

The expansion or retraction of the two support rods 105 connected with the bag opening cylinder 102 is realized through the expansion and retraction of the bag opening cylinder 102 of the opening component relative to the connecting sleeve 103. After radioactive solid waste is filled into the plastic package bag, the bag opening cylinder 102 is conveyed into the plastic package bag through the movable moving assembly, the bag opening cylinder 102 is pushed in the plastic package bag, the support rod 105 is unfolded, the plastic package bag is further opened, the subsequent heat sealing of the plastic package bag is facilitated, wrinkles are prevented from being generated when the plastic package bag is subjected to heat sealing, and the radioactive pollution source is prevented from being leaked due to untight sealing. By adopting the opening assembly, the plastic packaging bag in a negative pressure state can be effectively opened before heat sealing, the sealing performance of the plastic packaging bag can be better when the plastic packaging bag is subjected to heat sealing, and the radioactive solid waste in the plastic packaging bag is prevented from being leaked to cause pollution.

Further, referring to fig. 1, the moving assembly of the present invention comprises: the cantilever shaft electric cylinder 201, the cantilever shaft electric cylinder 201 is fixed in the first glove box through a fixing plate 206; the lower part of the cantilever shaft electric cylinder 201 is connected with an extension plate 202, and the extension plate 202 is connected with the distraction assembly; one side of cantilever axle electric cylinder 201 is provided with first drive unit for drive cantilever axle electric cylinder 201 reciprocates, and then drives and struts the subassembly and reciprocate in first glove box. The first driving unit includes a first servo motor 203 and a first speed reducer 204 connected thereto, and the first speed reducer 204 is connected to the fixing plate 206 through an adapter 205.

According to the glove box, the moving assembly is arranged above the opening assembly, so that the opening assembly can conveniently move in the first glove box, the movement of the opening assembly can be controlled by controlling the first driving unit, an automatic control flow is realized, high-radioactivity materials can be processed, and the application range of the glove box is further expanded.

Further, referring to fig. 2 and 3, the heat-seal assembly of the present invention comprises: a Z-axis slider 301 slidably coupled to the mounting bracket 5, and the Z-axis slider 301 slides in the vertical direction along the mounting bracket 5. Two X-axis sliding blocks 302 are arranged on the Z-axis sliding block 301; the X-axis slider 302 slides in the horizontal direction along the Z-axis slider 301. One of the X-axis sliding blocks 302 is provided with a first heat sealing machine bottom plate 303, the first heat sealing machine bottom plate 303 is connected with one end of a heat sealing strip pressing block 304, and a heat sealing strip is fixed on the heat sealing strip pressing block 304 and used for heat sealing of plastic packaging bags. A second heat sealing machine bottom plate 305 is arranged on the other X-axis sliding block 302, the second heat sealing machine bottom plate 305 is connected with a heat sealing clamping plate 306, a silica gel strip 307 is arranged on the heat sealing clamping plate 306 corresponding to the position of the heat sealing strip on the heat sealing strip pressing block 304, and the heat sealing strip and the silica gel strip 307 are arranged oppositely, so that the plastic packaging bag is better in sealing performance during heat sealing. The first heat sealer base plate 303 and the second heat sealer base plate 305 slide simultaneously inward or simultaneously outward on the Z-axis slider 301 along with the two X-axis sliders 302, respectively, to seal the spread plastic package bag.

According to the invention, the Z-axis slide block 301 and the two X-axis slide blocks 302 are arranged, so that the heat sealing assembly can move in the vertical direction and the horizontal direction, the heat sealing of the plastic packaging bag is realized, and in addition, the unfolding assembly is matched, so that the plastic packaging bag is not easy to wrinkle during heat sealing, and the leakage of radioactive pollutants is effectively prevented.

The middle of the mounting bracket 5 is provided with a ball screw 501, the ball screw 501 is connected with a second power unit at the lower part of the mounting bracket 5, and the left side and the right side of the mounting bracket 5 are provided with Z-axis guide rails 502 used for being matched with the Z-axis slide block 301 to enable the Z-axis slide block 301 to slide on the mounting bracket 5. The second power unit comprises a second servo motor 503 and a second speed reducer 504 connected with the second servo motor, an output shaft of the second speed reducer 504 is connected with the ball screw 501, the ball screw 501 is driven to rotate through rotation of the second speed reducer 504, and the Z-axis slider 301 is further controlled to move on the mounting bracket 5.

According to the invention, the second power unit controls the rotation of the ball screw 501, so that the moving distance of the Z-axis sliding block 301 in the vertical direction is controlled, the Z-axis sliding block 301 is more accurately positioned, and the heat sealing assembly can accurately heat the plastic package bag.

The middle part of the Z-axis sliding block 301 is provided with a trapezoidal lead screw 308, the trapezoidal lead screw 308 is connected with a third power unit arranged at one end of the Z-axis sliding block 301, and the upper side and the lower side of the Z-axis sliding block 301 are provided with X-axis guide rails 309 used for being matched with the X-axis sliding block 302 to enable the X-axis sliding block 302 to slide on the Z-axis sliding block 301. The third power unit comprises a third servo motor 310 and a commutator 311 connected with the third servo motor, the commutator 311 is connected with the trapezoidal lead screw 308, and the rotation direction of the trapezoidal lead screw 308 is controlled through the commutator 311, so that the first heat sealing machine base plate 303 and the second heat sealing machine base plate 305 can slide towards the inner side of the heat sealing assembly or slide towards the outer side of the heat sealing assembly simultaneously. When the first heat sealer base 303 and the second heat sealer base 305 slide simultaneously toward the inside of the heat seal assembly, that is, the first heat sealer base 303 and the second heat sealer base 305 are close to each other, the heat seal bar pressing block 304 on the first heat sealer base 303 and the heat seal clamping plate 306 on the second heat sealer base 305 perform the heat seal process on the plastic envelope. When the first heat sealer base 303 and the second heat sealer base 305 slide to the outside of the heat seal assembly at the same time, that is, when the first heat sealer base 303 and the second heat sealer base 305 are away from each other, the heat seal bar pressing block 304 on the first heat sealer base 303 and the heat seal clamping plate 306 on the second heat sealer base 305 complete the heat seal processing of the plastic envelope.

According to the invention, the third power unit controls the trapezoidal lead screw 308 to rotate, so that the sliding distance of the X-axis sliding block 302 on the Z-axis sliding block 301 is controlled, the X-axis sliding block 302 is more accurately positioned, and the heat sealing assembly is further used for accurately performing heat sealing on the plastic packaging bag.

Further, referring to fig. 4, the shearing assembly of the present invention comprises: a shearing bracket 401 fixed to the first heat sealer base plate 303, and a rodless cylinder 402 fixed to the shearing bracket 401; the rodless cylinder 402 is connected with the shearing cylinder 403, the rodless cylinder 402 is driven to extend and retract through the stretching of the shearing cylinder 403, the rodless cylinder 402 is connected with the circular cutter 404 through the circular cutter mounting seat 412, a guide rod 414 is arranged between the circular cutter mounting seat 412 and the circular cutter 404, and a compression spring 413 is sleeved on the periphery of the guide rod 414. The cutter disk 404 is fixed to a cutter disk mounting base 412 through a guide rod 414, and the cutter disk mounting base 412 can slide on the rodless cylinder 402, so that the cutter disk 404 moves on the rodless cylinder 402 in a direction perpendicular to the X-axis slider 302 and the Z-axis slider 301, and is used for cutting off the sealed plastic package.

The rodless cylinder 402 is fixed to the rodless cylinder mounting plate 405 by a rodless cylinder mounting member 406, and the rodless cylinder mounting member 406 may be a bolt. The lower part of the rodless cylinder mounting plate 405 is connected with one end of a spring shaft mounting seat 406, the other end of the spring shaft mounting seat 406 is connected with a spring shaft 410, and the spring shaft 410 is connected with a pressure plate 407. The shearing cylinder 403 penetrates through the shearing support 401 to be connected with the rodless cylinder mounting plate 405, the rodless cylinder mounting plate 405 is driven to move through the stretching of the shearing cylinder 403, and then the circular disc cutter 404 on the rodless cylinder 402 and the pressing plate 407 are driven to move synchronously. When the plastic envelope is cut by the cutter disk 404, the pressing plate 407 presses the plastic envelope at the lower portion of the cut portion.

According to the invention, the pressure plate 407 is arranged on the rodless cylinder mounting plate 405, so that when the plastic package bag is sheared by the circular cutter 404, the pressure plate 407 is used for pressing the plastic package bag at the lower part of a shearing part, and the leakage of radioactive pollutants caused by uneven shearing seams is prevented.

Further, the shearing assembly of the present invention further comprises a guide shaft 408, and the guide shaft 408 is connected to the rodless cylinder mounting plate 405 through a linear bearing 409 on the shearing bracket 401 for guiding the rodless cylinder 402. The two guide shafts 408 in the embodiment are respectively arranged on two sides of the shearing support 401, and the structure can better play a role in guiding and enable the rodless cylinder 402 to run more stably.

Further, the heat seal bar pressing block 304 of the present invention is disposed inside the first heat sealer base 303, and the shearing bar 401 is disposed outside the first heat sealer base 303. Above-mentioned structure can avoid heat-seal assembly and the mutual interference between the shearing subassembly, because heat-seal strip compact heap 304 sets up the inboard at first heat-seal machine bottom plate 303, cuts the outside that support 401 set up at first heat-seal machine bottom plate 303, when carrying out the heat-seal, at first heat-seal strip compact heap 304 carries out work earlier, and the back is accomplished in the heat-seal, and shearing cylinder 403 promotion circular disc cutter 404 on the rethread shearing support 401 stretches out, cuts the plastic envelope bag after the heat-seal. The heat seal bar pressing block 304 in this embodiment is provided on the upper portion of the circular cutter 404 on the shearing support 401. Of course, the present invention is not limited to this configuration, and the heat seal bar pressing block 304 may be provided below the circular cutter 404 on the cutting support 401, as long as the heat seal bar pressing block 304 and the circular cutter 404 on the cutting support 401 are provided at different positions and do not affect each other.

The working process of the invention is as follows:

the first servo motor 203 drives the unfolding component to move into the plastic package bag at the station port, and the two support rods 105 at the lower part of the bag opening cylinder 102 are controlled to unfold the plastic package bag in a shriveled state by controlling the bag opening cylinder 102 to stretch out; then, the heat sealing assembly is moved to the lower part of the expanding assembly through a second servo motor 503 and a third servo motor 310 to carry out first heat sealing; and repeating the operation, performing second heat sealing and third heat sealing, and after the heat sealing is completed by three seals, shearing the shearing assembly between the second seal and the third seal. After the third sealing and heat sealing is completed, the heat sealing assembly is kept still, the cutting disc 404 is driven to move forwards by the extension of the shearing air cylinder 403 and is in contact with the plastic package bag, the cutting disc 404 is driven to move horizontally by the movement of the rodless air cylinder, one reciprocating shearing is completed, and after the shearing is completed, the cutting disc 404 returns to the initial position.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined 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; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. 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, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean 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 second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.