Negative pressure conveying device for nitrogen charging protection and nitrogen recycling

Abstract

The utility model is suitable for the technical field of negative pressure conveying, and provides a negative pressure conveying device for nitrogen charging protection and nitrogen recycling. The first connecting pipe is connected with the output end of the negative pressure generation module and is connected to the air storage tank; the second connecting pipe is connected with the input end of the scraping plate; the filter plate is fixed in the second connecting pipe; the concave guide plate is mounted on one side, far away from the negative pressure generation module, of the filter plate; the discharging groove is formed in the second connecting pipe and located below the filtering plate; the conversion mechanism is used for converting potential energy of the gas into mechanical energy; the cleaning mechanism is used for cleaning the side, close to the concave guide plate, of the filter plate; the power transmission mechanism is used for transmitting the power of the conversion mechanism to enable the cleaning mechanism to operate; the impurity collecting mechanism is mounted below the discharging groove; the nitrogen recycling device has a good nitrogen recycling function.

Description

Technical Field

[0001] The utility model belongs to the technical field of negative pressure conveying, and particularly relates to a negative pressure conveying device with nitrogen filling protection and nitrogen recycling. Background Art

[0002] The negative pressure conveying device with nitrogen filling protection and nitrogen recycling is mainly used for quickly, accurately and controllably conveying materials in cases where it is necessary to protect the materials from the external environment, especially to avoid oxidation or pollution.

[0003] In the prior art, when nitrogen is used for protection, it is often impossible to recycle it.

[0004] Therefore, how to provide a negative pressure conveying device with nitrogen filling protection and nitrogen recycling is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a negative pressure conveying device with nitrogen filling protection and nitrogen recycling, aiming to solve the problems mentioned in the background art.

[0006] The utility model is realized as follows: a negative pressure conveying device with nitrogen filling protection and nitrogen recycling includes:

[0007] A negative pressure generating module;

[0008] A first connecting pipe, the first connecting pipe is connected to the output end of the negative pressure generating module, and the first connecting pipe is connected to a gas storage tank;

[0009] A second connecting pipe, the negative pressure generating module is connected to the input end of a scraper;

[0010] A filter plate, the filter plate is fixed inside the second connecting pipe;

[0011] A concave guiding plate, the concave guiding plate is installed on the side of the filter plate away from the negative pressure generating module;

[0012] A blanking chute, the blanking chute is arranged on the second connecting pipe and is located below the filter plate;

[0013] A conversion mechanism, the conversion mechanism is used to convert the potential energy of the gas into mechanical energy;

[0014] A cleaning mechanism, the cleaning mechanism is used to clean the side of the filter plate close to the concave guiding plate;

[0015] A power transmission mechanism, the power transmission mechanism is used to transmit the power of the conversion mechanism so that the cleaning mechanism operates;

[0016] An impurity collection mechanism, the impurity collection mechanism is installed below the blanking chute.

[0017] Preferably, one end of the second connecting pipe away from the first sliding rod is connected to the output end of the using device, and the air storage tank is connected to the input end of the using device through a third connecting pipe.

[0018] Preferably, the conversion mechanism includes:

[0019] A rotating shaft, which is rotatably connected to the second connecting pipe;

[0020] Fan plates, which are uniformly fixed on the position of the rotating shaft inside the second connecting pipe;

[0021] An eccentric wheel, which is installed at one end of the rotating shaft outside the second connecting pipe.

[0022] Preferably, the position of the fan plate is opposite to the guiding position of the concave guiding plate.

[0023] Preferably, the cleaning mechanism includes:

[0024] A first sliding rod, which is slidably connected to the second connecting pipe;

[0025] A mounting seat, which is fixed to one end of the first sliding rod inside the second connecting pipe;

[0026] A scraper, which is installed on the mounting seat and abuts against the surface of the filter plate;

[0027] A first elastic support assembly, which is used for elastically supporting the first sliding rod.

[0028] Preferably, the first elastic support assembly includes:

[0029] A first connecting plate, which is fixed to one end of the first sliding rod outside the second connecting pipe;

[0030] A first elastic member, which is sleeved on the first sliding rod and is located between the first connecting plate and the outer wall of the second connecting pipe.

[0031] Preferably, the power transmission mechanism includes:

[0032] A mounting sleeve, which is fixed to the outer wall of the second connecting pipe;

[0033] A second sliding rod, which is slidably connected to the mounting sleeve;

[0034] An extrusion inclined plate, which is fixed to the end of the second sliding rod away from the eccentric wheel, and the extrusion inclined plate abuts against the end face of the first sliding rod;

[0035] A second elastic support assembly, which is used for elastically supporting the second sliding rod.

[0036] Preferably, the second elastic support assembly includes:

[0037] A second connecting plate, which is slidably engaged with the inner wall of the mounting sleeve and fixedly connected to the second sliding rod;

[0038] A second elastic member, which is sleeved on the second sliding rod and located between the second connecting plate and the inner wall of the mounting sleeve.

[0039] Preferably, the impurity collection mechanism includes:

[0040] A collection box;

[0041] A blanking pipe, which is communicated with the blanking groove and the collection box;

[0042] A baffle, which is slidably connected and abuts against the bottom surface of the blanking pipe;

[0043] A positioning block, which is fixed on the baffle;

[0044] A pull rope, one end of which is fixed to the end of the baffle outside the collection box, and the other end of which is connected to a moving mechanism for driving its movement.

[0045] Preferably, the moving mechanism includes:

[0046] A winding wheel, which is rotatably connected to the end of the rotating shaft away from the eccentric wheel and is used for winding the pull rope;

[0047] A limiting chute, which is arranged inside the winding wheel;

[0048] A clamping slider, which is slidably engaged with the limiting chute, and one end of which is arc-shaped and partially nested inside the rotating shaft;

[0049] A third elastic member, the two ends of which are respectively fixedly connected to the bottom of the clamping slider and the inner wall of the limiting chute.

[0050] Compared with the prior art, the beneficial effects of the present utility model are as follows: By setting a negative pressure generating module, a first connecting pipe, a second connecting pipe, a filter plate, a concave guiding plate, a feeding chute, a gas storage tank, a conversion mechanism, a cleaning mechanism, a power transmission mechanism and an impurity collection mechanism, when in use, negative pressure is generated by the negative pressure generating module, so as to play a conveying function. After nitrogen plays a protective function, it is recycled through the second connecting pipe and finally conveyed into the gas storage tank through the first connecting pipe for storage. When nitrogen is needed, the nitrogen in the gas storage tank can be mobilized for use. Specifically, nitrogen and impurities are opposite to the filter plate under the guidance of the concave guiding plate. Nitrogen passes through the filter plate to achieve solid-gas separation. Subsequently, the potential energy of the flowing nitrogen is converted into mechanical energy by the conversion mechanism and transmitted through the power transmission mechanism to drive the cleaning mechanism to operate. The cleaning mechanism cleans the surface of the filter plate close to the concave guiding plate. The impurities are guided by the feeding chute under the action of gravity and collected in the impurity collection mechanism. Self-cleaning can be realized throughout the process, which is simple and convenient and facilitates the recycling of nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model.

[0052] Figure 1 FIG. is a schematic structural diagram of a negative pressure conveying device for nitrogen circulation use with nitrogen filling protection provided by an embodiment of the present utility model.

[0053] Figure 2 FIG. is a schematic structural diagram of a second connecting pipe in a negative pressure conveying device for nitrogen circulation use with nitrogen filling protection provided by an embodiment of the present utility model.

[0054] Figure 3 is Figure 2 structural schematic diagram of part A of

[0055] In the drawings: 1 - negative pressure generating module; 2 - first connecting pipe; 3 - second connecting pipe; 4 - filter plate; 5 - concave guiding plate; 6 - rotating shaft; 7 - fan plate; 8 - eccentric wheel; 9 - feeding chute; 10 - scraper; 11 - first sliding rod; 12 - first connecting plate; 13 - first elastic member; 14 - mounting sleeve; 15 - second sliding rod; 16 - extrusion inclined plate; 17 - second connecting plate; 18 - second elastic member; 19 - mounting seat; 20 - collection box; 21 - feeding pipe; 22 - baffle; 23 - positioning block; 24 - pull rope; 25 - winding wheel; 26 - limiting sliding groove; 27 - clamping slider; 28 - third elastic member; 29 - using device; 30 - gas storage tank; 100 - conversion mechanism; 200 - cleaning mechanism; 300 - power transmission mechanism; 400 - impurity collection mechanism; 500 - moving mechanism. Detailed implementation manners

[0056] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0057] The following describes in detail the specific implementation of the present utility model with reference to specific embodiments.

[0058] As Figure 1 、 Figure 2 shown, it is a schematic structural diagram of a negative pressure conveying device with nitrogen filling protection and nitrogen recycling provided by an embodiment of the present utility model, including:

[0059] Negative pressure generating module 1;

[0060] The first connecting pipe 2, the first connecting pipe 2 is connected to the output end of the negative pressure generating module 1, and the first connecting pipe 2 is connected to the gas storage tank 30;

[0061] The second connecting pipe 3, the negative pressure generating module 1 is connected to the input end of the scraper 10;

[0062] The filter plate 4, the filter plate 4 is fixed in the second connecting pipe 3;

[0063] The concave guiding plate 5, the concave guiding plate 5 is installed on the side of the filter plate 4 away from the negative pressure generating module 1;

[0064] The feeding trough 9, the feeding trough 9 is arranged on the second connecting pipe 3 and is located below the filter plate 4;

[0065] The conversion mechanism 100, the conversion mechanism 100 is used to convert the potential energy of the gas into mechanical energy;

[0066] The cleaning mechanism 200, the cleaning mechanism 200 is used to clean the side of the filter plate 4 close to the concave guiding plate 5;

[0067] The power transmission mechanism 300, the power transmission mechanism 300 is used to transmit the power of the conversion mechanism 100 so that the cleaning mechanism 200 operates;

[0068] The impurity collection mechanism 400, the impurity collection mechanism 400 is installed below the feeding trough 9.

[0069] In the embodiment of the present utility model, when in use, a negative pressure is generated by the negative pressure generating module 1 to achieve a conveying function. After nitrogen plays a protective function, it is recovered through the second connecting pipe 3 and finally conveyed into the gas storage tank 30 through the first connecting pipe 2 for storage. When nitrogen is needed, the nitrogen in the gas storage tank 30 can be mobilized for use. Specifically, nitrogen and impurities are opposite to the filter plate 4 under the guidance of the concave guiding plate 5. Nitrogen passes through the filter plate 4 to achieve solid-gas separation. Subsequently, the conversion mechanism 100 converts the potential energy of the flowing nitrogen into mechanical energy and transmits it through the power transmission mechanism 300 to drive the cleaning mechanism 200 to operate. The cleaning mechanism 200 cleans the surface of the filter plate 4 on the side close to the concave guiding plate 5. The impurities are guided by the feeding chute 9 under the action of gravity and collected in the impurity collection mechanism 400. The whole process can achieve self-cleaning, which is simple and convenient and facilitates the recycling of nitrogen.

[0070] In one case of this embodiment, the end of the second connecting pipe 3 far from the first sliding rod 11 is connected to the output end of the using device, and the gas storage tank is connected to the input end of the using device through a third connecting pipe. The using device is a device that uses nitrogen to protect its processing process. For example, nitrogen is required for protection during the production and processing of water reducing agents and polyurethane resins.

[0071] In one case of this embodiment, the negative pressure generating module 1 is a prior art, and negative pressure can be generated through piston movement, or negative pressure conveying can be achieved according to mechanical structures such as gear pumps and gear motors.

[0072] Such as Figure 2 As shown, as a preferred embodiment of the present utility model, the conversion mechanism 100 includes:

[0073] A rotating shaft 6, which is rotatably connected to the second connecting pipe 3;

[0074] Fan plates 7, which are uniformly fixed on the position of the rotating shaft 6 located inside the second connecting pipe 3;

[0075] An eccentric wheel 8, which is installed at one end of the rotating shaft 6 located outside the second connecting pipe 3.

[0076] In the embodiment of the present utility model, when in use, nitrogen blows the fan plates 7 to rotate. The fan plates 7 drive the rotating shaft 6 to rotate, the rotating shaft 6 drives the eccentric wheel 8 to rotate, and the eccentric wheel 8 reciprocally presses the cleaning mechanism 200, so that the power is transmitted to the conversion mechanism 100, enabling the conversion mechanism 100 to clean the filter plate 4.

[0077] In one case of this embodiment, the position of the fan plates 7 is opposite to the guiding position of the concave guiding plate 5. Such a setting can improve the conversion efficiency.

[0078] As shown Figure 2 As another preferred embodiment of the present utility model, the cleaning mechanism 200 includes:

[0079] A first sliding rod 11, which is slidably connected to the second connecting pipe 3;

[0080] A mounting seat 19, which is fixed to one end of the first sliding rod 11 located inside the second connecting pipe 3;

[0081] A scraper 10, which is mounted on the mounting seat 19 and abuts against the surface of the filter plate 4;

[0082] A first elastic support assembly, which is used to elastically support the first sliding rod 11.

[0083] In the embodiment of the present utility model, when in use, when the eccentric wheel 8 presses the power transmission mechanism 300, the power transmission mechanism 300 is converted into power to drive the first sliding rod 11 to move towards the second connecting pipe 3. The first sliding rod 11 overcomes the elastic force of the first elastic support assembly, thereby driving the mounting seat 19 and the scraper 10 to move, and the scraper 10 cleans the surface of the filter plate 4, and then is reset by the elastic force of the first elastic support assembly.

[0084] In one case of this embodiment, the first elastic support assembly includes:

[0085] A first connecting plate 12, which is fixed to one end of the first sliding rod 11 located outside the second connecting pipe 3;

[0086] A first elastic member 13, which is sleeved on the first sliding rod 11 and is located between the first connecting plate 12 and the outer wall of the second connecting pipe 3.

[0087] In this embodiment, when the power transmission mechanism 300 presses the first sliding rod 11 to make the first sliding rod 11 move towards the second connecting pipe 3, the first sliding rod 11 drives the first connecting plate 12 to move, and the first connecting plate 12 presses the first elastic member 13, and the first elastic member 13 stores energy, so as to facilitate the subsequent driving of the first connecting plate 12 and the first sliding rod 11 to reset by the elastic force of the first elastic member 13.

[0088] As shown Figure 2 As another preferred embodiment of the present utility model, the power transmission mechanism 300 includes:

[0089] A mounting sleeve 14, which is fixed to the outer wall of the second connecting pipe 3;

[0090] A second sliding rod 15, which is slidably connected to the mounting sleeve 14;

[0091] The extrusion inclined plate 16 is fixed to one end of the second sliding rod 15 away from the eccentric wheel 8, and the extrusion inclined plate 16 abuts against the end face of the first sliding rod 11;

[0092] The second elastic support assembly is used for elastically supporting the second sliding rod 15.

[0093] In the embodiment of the present utility model, when in use, the eccentric wheel 8 squeezes the second sliding rod 15 to move towards the first sliding rod 11. The second sliding rod 15 drives the extrusion inclined plate 16 to move, and the extrusion inclined plate 16 squeezes the first sliding rod 11 through its inclined surface, so that the first sliding rod 11 moves towards the second connecting pipe 3. The first sliding rod 11 drives the mounting seat 19 and the scraper 10 to move, thereby cleaning the filter plate 4. When the eccentric wheel 8 rotates from the longer end to the shorter end and abuts against the second sliding rod 15, the second sliding rod 15 and the extrusion inclined plate 16 are driven to reset by the elastic force of the second elastic support assembly. At the same time, the first sliding rod 11 drives the first connecting plate 12 to move, and the first connecting plate 12 squeezes the first elastic member 13, and the first elastic member 13 stores energy, so as to facilitate the subsequent reset of the first connecting plate 12 and the first sliding rod 11 by the elastic force of the first elastic member 13.

[0094] In one case of this embodiment, the second elastic support assembly includes:

[0095] The second connecting plate 17 is slidably matched with the inner wall of the mounting sleeve 14, and the second connecting plate 17 is fixedly connected with the second sliding rod 15;

[0096] The second elastic member 18 is sleeved on the second sliding rod 15 and is located between the second connecting plate 17 and the inner wall of the mounting sleeve 14.

[0097] In this embodiment, when the eccentric wheel 8 rotates from the shorter end to the longer end, the eccentric wheel 8 squeezes the second sliding rod 15 to move, and the second sliding rod 15 drives the second connecting plate 17 to move. The second connecting plate 17 thus squeezes the second elastic member 18, so that the second elastic member 18 stores energy for subsequent reset.

[0098] As Figure 2 shown, as another preferred embodiment of the present utility model, the impurity collection mechanism 400 includes:

[0099] The collection box 20;

[0100] The blanking pipe 21, which is communicated with the blanking groove 9 and the collection box 20;

[0101] The baffle 22 is slidably connected, and the baffle 22 abuts against the bottom surface of the blanking pipe 21;

[0102] The positioning block 23 is fixed to the baffle 22.

[0103] The pulling rope 24 has one end fixed to one end of the baffle 22 outside the collection box 20, and the other end of the pulling rope 24 is connected to a moving mechanism 500 for driving its movement.

[0104] In the embodiment of the present utility model, the moving mechanism 500 drives the pulling rope 24 to move, and the pulling rope 24 pulls the baffle 22 to move until the positioning block 23 abuts against the inner wall of the collection box 20. At this time, the baffle 22 is away from the feeding pipe 21, so that the impurities in the feeding groove 9 fall into the collection box 20 through the feeding pipe 21 and are collected.

[0105] As Figure 3 shown, as another preferred embodiment of the present utility model, the moving mechanism 500 includes:

[0106] The winding wheel 25 is rotatably connected to one end of the rotating shaft 6 away from the eccentric wheel 8, and the winding wheel 25 is used for winding the pulling rope 24.

[0107] The limiting sliding groove 26 is arranged in the winding wheel 25.

[0108] The clamping sliding block 27 is slidably matched with the limiting sliding groove 26, and one end of the clamping sliding block 27 is arc-shaped and partially nested in the rotating shaft 6.

[0109] The third elastic member 28 has two ends respectively fixed to the bottom of the clamping sliding block 27 and the inner wall of the limiting sliding groove 26.

[0110] In the embodiment of the present utility model, when in use, the rotating shaft 6 drives the winding wheel 25 to rotate, the winding wheel 25 winds the pulling rope 24, and the pulling rope 24 pulls the baffle 22 to move until the positioning block 23 abuts against the inner wall of the collection box 20. At this time, the baffle 22 is away from the feeding pipe 21, so that the impurities in the feeding groove 9 fall into the collection box 20 through the feeding pipe 21 and are collected. Since the positioning block 23 abuts against the inner wall of the collection box 20, the baffle 22 cannot move. At this time, the rotating shaft 6 rotates to squeeze the clamping sliding block 27, so that the clamping sliding block 27 retracts into the limiting sliding groove 26 until the clamping sliding block 27 cooperates with the rotating shaft 6 again, thereby realizing the intermittent opening of the baffle 22 and collecting the garbage in the collection box 20.

[0111] In the above-mentioned embodiment of the present utility model, a negative pressure conveying device with nitrogen filling protection and nitrogen recycling is provided. By setting a negative pressure generating module 1, a first connecting pipe 2, a second connecting pipe 3, a filter plate 4, a concave guiding plate 5, a blanking chute 9, a gas storage tank 30, a conversion mechanism 100, a cleaning mechanism 200, a power transmission mechanism 300 and an impurity collection mechanism 400, when in use, negative pressure is generated by the negative pressure generating module 1 to achieve the conveying function. After nitrogen plays a protection function, it is recycled through the second connecting pipe 3 and finally conveyed into the gas storage tank 30 through the first connecting pipe 2 for storage. When nitrogen needs to be used, the nitrogen in the gas storage tank 30 can be mobilized for use. Specifically, nitrogen and impurities are opposite to the filter plate 4 under the guidance of the concave guiding plate 5. Nitrogen passes through the filter plate 4 to achieve solid-gas separation. Subsequently, the conversion mechanism 100 converts the potential energy of the flowing nitrogen into mechanical energy, and transmits it through the power transmission mechanism 300 to drive the cleaning mechanism 200 to operate. The cleaning mechanism 200 cleans the surface of the filter plate 4 on the side close to the concave guiding plate 5. The impurities are guided by the blanking chute 9 under the action of gravity and collected in the impurity collection mechanism 400. Self-cleaning can be realized throughout the process, which is simple and convenient and facilitates the recycling of nitrogen.

[0112] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A negative pressure conveying device with nitrogen filling protection and nitrogen recycling, characterized in that, The device includes: A negative pressure generating module; A first connecting pipe, the first connecting pipe is connected to the output end of the negative pressure generating module, and the first connecting pipe is connected to a gas storage tank; A second connecting pipe, the negative pressure generating module is connected to the input end of the scraper; A filter plate, the filter plate is fixed inside the second connecting pipe; A concave guiding plate, the concave guiding plate is installed on the side of the filter plate away from the negative pressure generating module; A blanking chute, the blanking chute is arranged on the second connecting pipe and is located below the filter plate; A conversion mechanism, the conversion mechanism is used to convert the potential energy of the gas into mechanical energy; A cleaning mechanism, the cleaning mechanism is used to clean the side of the filter plate close to the concave guiding plate; A power transmission mechanism, the power transmission mechanism is used to transmit the power of the conversion mechanism so that the cleaning mechanism operates; An impurity collection mechanism, the impurity collection mechanism is installed below the blanking chute.

2. The negative pressure conveying device for nitrogen filling protection with nitrogen recycling according to claim 1, wherein, One end of the second connecting pipe far from the first sliding rod is connected to the output end of the using device, and the gas storage tank is connected to the input end of the using device through a third connecting pipe.

3. A negative pressure conveying device for nitrogen filling protection with nitrogen recycling, characterized in that, The conversion mechanism includes: A rotating shaft, the rotating shaft is rotatably connected to the second connecting pipe; Fan plates, the fan plates are uniformly fixed at the position of the rotating shaft inside the second connecting pipe; An eccentric wheel, the eccentric wheel is installed at one end of the rotating shaft outside the second connecting pipe.

4. A negative pressure conveying device for nitrogen filling protection with nitrogen recycling, characterized in that The position of the fan plate is opposite to the guiding position of the concave guiding plate.

5. The negative pressure conveying device for nitrogen filling protection and nitrogen recycling according to claim 3, characterized in that, The cleaning mechanism includes: A first sliding rod, the first sliding rod is slidably connected to the second connecting pipe; A mounting seat, the mounting seat is fixed at one end of the first sliding rod inside the second connecting pipe; A scraper, the scraper is installed on the mounting seat and abuts against the surface of the filter plate; A first elastic support assembly, the first elastic support assembly is used to elastically support the first sliding rod.

6. The negative pressure conveying device for nitrogen filling protection and nitrogen recycling according to claim 5, characterized in that, The first elastic support assembly includes: A first connecting plate, the first connecting plate is fixed at one end of the first sliding rod outside the second connecting pipe; A first elastic member, the first elastic member is sleeved on the first sliding rod and is located between the first connecting plate and the outer wall of the second connecting pipe.

7. A negative pressure conveying device for nitrogen filling protection and nitrogen recycling according to claim 5, characterized in that, The power transmission mechanism includes: A mounting sleeve, the mounting sleeve is fixed on the outer wall of the second connecting pipe; A second sliding rod, the second sliding rod is slidably connected to the mounting sleeve; An extrusion inclined plate, the extrusion inclined plate is fixed at one end of the second sliding rod far from the eccentric wheel, and the extrusion inclined plate abuts against the end face of the first sliding rod; A second elastic support assembly, the second elastic support assembly is used to elastically support the second sliding rod.

8. A negative pressure conveying device for nitrogen filling protection and nitrogen recycling according to claim 7, characterized in that, The second elastic support assembly includes: A second connecting plate, the second connecting plate is slidably matched with the inner wall of the mounting sleeve, and the second connecting plate is fixedly connected to the second sliding rod; A second elastic member, the second elastic member is sleeved on the second sliding rod and is located between the second connecting plate and the inner wall of the mounting sleeve.

9. The negative pressure conveying device for nitrogen filling protection and nitrogen recycling according to claim 3, characterized in that, The impurity collection mechanism includes: [[ID=3s4]]A collection box; A blanking pipe, the blanking pipe is communicated with the blanking chute and the collection box; A baffle, the baffle is slidably connected, and the baffle abuts against the bottom surface of the blanking pipe; A positioning block, the positioning block is fixed on the baffle; A pulling rope, one end of the pulling rope is fixed at one end of the baffle outside the collection box, and the other end of the pulling rope is connected to a moving mechanism for driving its movement.

10. A negative pressure conveying device for nitrogen filling protection with nitrogen recycling, characterized in that, The moving mechanism includes: A reel, the reel is rotatably connected to one end of the rotating shaft away from the eccentric wheel, and the reel is used for winding a pulling rope; A limiting sliding groove, the limiting sliding groove is arranged in the reel; A clamping slider, the clamping slider is slidably matched with the limiting sliding groove, one end of the clamping slider is arc-shaped and partially nested in the rotating shaft; A third elastic member, both ends of the third elastic member are fixedly connected to the bottom of the clamping slider and the inner wall of the limiting sliding groove respectively.

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