Automatic paper guiding device of paper machine

Abstract

The invention belongs to the technical field of papermaking, and particularly relates to an automatic paper injection device of a paper machine, which comprises a paper injection device main body, a dustproof net and a high-pressure paper injection water needle, the dustproof net is movably connected to the inner wall of the paper injection device main body, and the front side of the dustproof net extends to the outside of the paper injection device main body; a fixing box is fixedly connected to the front side of the paper guiding device body, an unlocking plate is slidably connected to the inner wall of the fixing box, positioning plates are symmetrically and fixedly connected to the top of the unlocking plate, the number of the positioning plates is two, and positioning grooves are symmetrically formed in the bottom of a dustproof net. Dust is prevented from entering the paper injection device body through the dustproof net, follow-up processing of paper is prevented from being affected, the position of the high-pressure paper injection water needle is conveniently adjusted according to using requirements by fixing or unlocking the sliding sleeve, and therefore paper can be conveniently trimmed, and good practicability and convenience are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking, and in particular to an automatic paper feeding device for a papermaking machine. Background Art

[0002] The whole set of equipment that makes pulp into paper web is called paper machine, which includes the main machine such as headbox, wire section, press section, drying section, calender, reel and transmission section, and auxiliary systems such as steam, water, vacuum, lubrication and heat recovery. The transmission section is often used for paper threading device, and during the paper threading process, the paper machine often needs to be trimmed.

[0003] The utility model with announcement number: CN209584719U discloses an automatic trimming and paper-feeding device for a papermaking machine, including a paper-feeding device body, a gantry support plate is provided on the upper side of the conveyor belt of the paper-feeding device body, both ends of the gantry support plate are fixedly connected to the paper-feeding device body through a limiting mechanism, a strip opening is provided on the upper end surface of the gantry support plate, a slider is fixedly connected to the front and rear side walls of the mounting plate, a slide groove matching the slider is provided on the inner wall of the strip opening, a moving mechanism for controlling the simultaneous movement of two mounting plates is provided on the gantry support plate, a pressing wheel is provided on the lower side of the mounting plate, the pressing wheel is fixedly connected to the mounting plate through an elastic limiting mechanism, a trimming mechanism is provided on one side of the pressing wheel, and the trimming mechanism is fixedly mounted on the mounting plate. The utility model can conveniently control the positions of two paper-cutting water needles by setting a moving mechanism, and at the same time, press the paper during cutting to ensure the cutting flatness.

[0004] The utility model with announcement number: CN220617167U relates to the field of paper technology, and in particular to an automatic paper feeding device for a papermaking machine, comprising a paper feeding device body, the paper feeding device body comprising a base and a conveyor belt, wherein the base is located at the bottom of the paper feeding device body, wherein the conveyor belt is located inside the paper feeding device body, a push rod is installed on a shorter side surface of the periphery of the base, a control box is arranged on a longer side surface of the periphery of the base, a control panel is arranged on a longer side surface of the periphery of the control box, a driving motor is arranged inside the control box, a paper outlet is opened on a shorter side surface of the periphery of the base, and a paper board is installed on a shorter side surface of the periphery of the base close to the paper outlet. In the utility model, the problem of poor dust prevention effect of ordinary paper feeding devices is effectively solved through the base, the slide groove, the slider, the dustproof plate and the dustproof net.

[0005] In the prior art, the automatic paper-feeding device for papermaking machines, in actual use, the high-pressure paper-feeding water needle in the main body of the paper-feeding device is usually fixed during use, and the positions of the cutting edges of different types of paper are different, which leads to inconvenience during use. Moreover, when the paper-feeding device is in use, dust from the outside is easy to enter the paper-feeding device, which affects the subsequent processing of the paper and is inconvenient to use. Therefore, we propose an automatic paper-feeding device for papermaking machines to solve the above-mentioned problems. Summary of the invention

[0006] Based on the background technology, in actual use, the high-pressure paper-feeding water needle in the main body of the paper-feeding device is usually fixed, and the positions of the cutting edges of different types of paper are different, which leads to inconvenience in use. In addition, when the paper-feeding device is in use, external dust and the like are easy to enter the paper-feeding device, resulting in technical problems such as affecting the subsequent processing of the paper and being inconvenient to use. The present invention proposes an automatic paper-feeding device for a papermaking machine.

[0007] The automatic paper-feeding device of a papermaking machine proposed in the present invention comprises a paper-feeding device main body, a dust-proof net and a high-pressure paper-feeding water needle, the dust-proof net is movably connected to the inner wall of the paper-feeding device main body, and the front side of the dust-proof net extends to the outside of the paper-feeding device main body, the front side of the paper-feeding device main body is fixedly connected with a fixing box, the inner wall of the fixing box is slidably connected with an unlocking plate, the top of the unlocking plate is symmetrically fixedly connected with a positioning plate, and the number of the positioning plates is two, the bottom of the dust-proof net is symmetrically provided with positioning grooves, and the number of the positioning grooves is two, the two positioning plates are engaged with the corresponding positioning grooves, the inner wall of the fixed box is provided with a fixing mechanism, the inner wall of the paper-feeding device main body is fixedly connected with a sliding rod, the outer wall of the sliding rod is symmetrically slidably connected with a sliding sleeve, and the number of the sliding sleeves is two, the number of the high-pressure paper-feeding water needles is two, the two high-pressure paper-feeding water needles are fixedly connected to the left side of the corresponding sliding sleeve, and a limiting mechanism is provided on the side where the two sliding sleeves are away from each other.

[0008] By means of the above mechanism: the dustproof net is used to prevent dust and the like from entering the paper feeding device body, the dustproof net is fixed or unlocked by the fixing mechanism, so that the dustproof net can be installed or removed for cleaning and replacement, thereby preventing dust from entering the paper feeding device body and affecting the subsequent processing of the paper, and the sliding sleeve is fixed or unlocked by the limiting mechanism, thereby facilitating the adjustment of the position of the high-pressure paper feeding water needle according to the use requirements, thereby facilitating the edge trimming of the paper according to the use requirements.

[0009] Preferably, the fixing mechanism comprises: a control plate, a connecting plate, a push rod and a connecting rod;

[0010] The control plate is slidably connected to the bottom of the fixed box, the connecting plate is slidably connected to the inner wall of the fixed box, and the bottom of the connecting plate extends to the outside of the fixed box, the bottom of the connecting plate is fixedly connected to the top of the control plate, the push rod is rotatably connected to the front side of the connecting plate, the connecting rod is fixedly connected to the bottom of the unlocking plate, and the front side of the connecting rod is rotatably connected to the rear side of the push rod.

[0011] Furthermore, when the control plate moves, the connecting plate will move to the left, and when the connecting plate moves, the push rod will be pushed. At this time, the movement of the push rod will push the connecting rod downward. When the connecting rod moves, the unlocking plate will move downward. When the unlocking plate moves, the positioning plate will move downward. The dust net can be fixed or unlocked conveniently by moving the positioning plate up and down.

[0012] Preferably, the limiting mechanism comprises: two push plates, two levers, two rotating rods, two hollow plates and two plug plates;

[0013] The two push plates are slidably connected to the right side of the corresponding sliding sleeves, the two levers are fixedly connected to the left side of the corresponding push plates, the two rotating rods are rotatably connected to one side of the corresponding sliding sleeves, the two rotating rods are hollow structures, the inner walls of the two rotating rods are slidably connected to the outer walls of the corresponding levers, the two hollow plates are slidably connected to the sides of the two sliding sleeves away from each other, the tops of the two hollow plates are slidably connected to the bottoms of the corresponding rotating rods, the two plug plates are fixedly connected to the left sides of the corresponding hollow plates, and a plurality of slots are symmetrically opened at equal intervals on the right side of the sliding rod, and the plug plates are engaged with the slots.

[0014] Furthermore, when the push plate moves, the lever will move backward, and the movement of the lever will push the rotating rod to rotate. At this time, the rotation of the rotating rod will push the hollow plate to move right. At this time, the movement of the hollow plate will drive the plug plate to move right. At this time, the plug plate will move out of contact with the slot. The plug plate moves out of contact with the slot, which makes it convenient to unlock the sliding sleeve, thereby facilitating the adjustment of the position of the high-pressure paper feed water needle according to usage requirements.

[0015] Preferably, the inner wall of the fixed box is fixedly connected to a limit frame, the limit frame passes through the connecting plate, the outer wall of the limit frame is sleeved with a limit spring, the left side of the limit spring is fixedly connected to the outer wall of the limit frame, and the right side of the limit spring is fixedly connected to the left side of the connecting plate.

[0016] Furthermore, the connection plate can be conveniently limited by the limiting frame so that the connection plate can be moved laterally, and the elastic force of the limiting spring can conveniently push the connection plate to move rightward and reset.

[0017] Preferably, a contact plate is fixedly connected to the inner wall of the fixed box, the top of the contact plate is in movably contact with the bottom of the unlocking plate, the bottom of the contact plate is fixedly connected to the top of the limit frame, the top of the contact plate is symmetrically fixedly connected to the limit rods, and there are two limit rods, both of which pass through the unlocking plate.

[0018] Furthermore, the unlocking plate can be limited by the limit rod so that the unlocking plate can move stably, the moving distance of the unlocking plate can be limited by the contact plate, and the limit rod can be supported and fixed by the contact plate so that the limit rod remains stable during use.

[0019] Preferably, the inner wall of the fixed box is symmetrically fixedly connected with return springs, and the number of the return springs is two, and the tops of the two return springs are fixedly connected to the bottom of the unlocking plate.

[0020] Furthermore, through the elastic force of the reset spring, the unlocking plate can be easily pushed up and reset, thereby driving the positioning plate to engage with the positioning groove.

[0021] Preferably, the sides of the two sliding sleeves that are away from each other are fixedly connected with push springs, and the sides of the two push springs that are away from each other are respectively fixedly connected to the sides of the two push plates that are close to each other.

[0022] Furthermore, the push plate can be easily pushed to move and reset by the elastic force of the push spring.

[0023] Preferably, the outer walls of the two levers are fixedly connected to the limiting plate, the sides of the two sliding sleeves that are away from each other are fixedly connected to the guide plate, the guide plate is a hollow structure, the inner wall of the guide plate is slidably connected to the outer wall of the plug plate, the right side of the guide plate is fixedly connected to the positioning spring, and the right side of the positioning spring is fixedly connected to the left side of the hollow plate.

[0024] Furthermore, the limiting plate is used to limit the plug plate, so that the plug plate can move laterally stably, which facilitates the plug plate to engage with the slot. The elastic force of the positioning spring can facilitate the hollow plate and the plug plate to move laterally and engage with the slot.

[0025] The beneficial effects of the present invention are:

[0026] 1. The dustproof net is convenient to prevent dust from entering the paper feeding device body, and the dustproof net is convenient to fix or unlock through the fixing mechanism, so that the dustproof net can be installed, removed, cleaned and replaced. The sliding sleeve is convenient to fix or unlock through the limiting mechanism, so as to facilitate the adjustment of the position of the high-pressure paper feeding water needle according to the use requirements;

[0027] 2. When the control panel moves, the connecting plate will move to the left, and when the connecting plate moves, the push rod will be pushed. At this time, the push rod will push the connecting rod down. When the connecting rod moves, the unlocking plate will move down. When the unlocking plate moves, the positioning plate will move down. The positioning plate moves up and down to facilitate the fixing or unlocking of the dust screen;

[0028] 3. When the push plate moves, the lever will move backward, and the lever will push the rotating rod to rotate. At this time, the rotating rod will push the hollow plate to move right. At this time, the movement of the hollow plate will drive the plug plate to move right. At this time, the plug plate will move out of contact with the slot. The plug plate moves out of contact with the slot, which makes it easy to unlock the sliding sleeve, so as to adjust the position of the high-pressure paper guide needle according to the use requirements;

[0029] The present invention fixes the dustproof net through a simple structure, prevents dust from entering the paper feeding device body through the dustproof net to avoid affecting the subsequent processing of paper, and conveniently adjusts the position of the high-pressure paper feeding water needle according to usage requirements by fixing or unlocking the sliding sleeve, thereby facilitating the edge trimming of paper, and has good practicality and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a front view of an automatic paper feeding device for a paper machine proposed by the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a top view of an automatic paper feeding device for a paper machine proposed by the present invention;

[0032] Figure 3 This is a schematic diagram of the main cross-section structure of a fixed box of an automatic paper threading device for a paper machine proposed by the present invention;

[0033] Figure 4 A schematic diagram of a top view and cross-section of an automatic paper feeding device for a paper machine proposed by the present invention;

[0034] Figure 5 The invention provides an attachment for an automatic paper feeding device for a paper machine Figure 4 The structural diagram of part A in the figure;

[0035] Figure 6 The present invention provides a stereoscopic diagram of a push plate, a limit plate and a lever of an automatic paper guiding device for a paper machine.

[0036] In the figure: 1. Paper guiding device body; 2. Dust-proof net; 3. Fixed box; 4. Control board; 5. Connecting plate; 6. Limiting frame; 7. Limiting spring; 8. Push rod; 9. Connecting rod; 10. Unlocking plate; 11. Contact plate; 12. Limiting rod; 13. Reset spring; 14. Positioning plate; 15. Sliding rod; 16. Sliding sleeve; 17. High-pressure paper guiding water needle; 18. Pushing plate; 19. Pushing spring; 20. Limiting plate; 21. Dial rod; 22. Rotating rod; 23. Hollow plate; 24. Guide plate; 25. Positioning spring; 26. Insert plate. DETAILED DESCRIPTION

[0037] The present invention will be further explained below in conjunction with specific embodiments.

[0038] refer to Figure 1-6 In the present embodiment, an automatic paper feeding device for a papermaking machine is proposed, comprising a paper feeding device body 1, a dustproof net 2 and a high-pressure paper feeding water needle 17. The dustproof net 2 is movably connected to the inner wall of the paper feeding device body 1, and the front side of the dustproof net 2 extends to the outside of the paper feeding device body 1. A fixed box 3 is fixedly connected to the front side of the paper feeding device body 1, and an unlocking plate 10 is slidably connected to the inner wall of the fixed box 3. A positioning plate 14 is symmetrically fixedly connected to the top of the unlocking plate 10, and the number of the positioning plates 14 is two. Positioning grooves are symmetrically opened at the bottom of the dustproof net 2, and the number of the positioning grooves is two. The two positioning plates 14 are engaged with the corresponding positioning grooves. A fixing mechanism is provided on the inner wall of the fixed box 3. A sliding rod 15 is fixedly connected to the inner wall of the paper feeding device body 1, and a sliding sleeve 16 is symmetrically slidably connected to the outer wall of the sliding rod 15, and the number of the sliding sleeves 16 is two. The number of the high-pressure paper feeding water needles 17 is two, and the two high-pressure paper feeding water needles 17 are fixedly connected to the left side of the corresponding sliding sleeve 16, and the two sliding sleeves 16 are both provided with a limiting mechanism on the side away from each other.

[0039] By means of the above-mentioned mechanism: the dustproof net 2 is used to conveniently prevent dust and the like from entering the paper-feeding device body 1, and the dustproof net 2 is conveniently fixed or unlocked through the fixing mechanism, so that the dustproof net 2 can be installed or removed for cleaning and replacement, thereby preventing dust from entering the paper-feeding device body 1 and avoiding affecting the subsequent processing of paper. The sliding sleeve 16 is conveniently fixed or unlocked through the limiting mechanism, thereby facilitating the adjustment of the position of the high-pressure paper-feeding water needle 17 according to the use requirements, thereby facilitating the trimming of the paper according to the use requirements.

[0040] In this embodiment, the fixing mechanism includes: a control panel 4, a connecting panel 5, a push rod 8 and a connecting rod 9; the control panel 4 is slidably connected to the bottom of the fixing box 3, the connecting panel 5 is slidably connected to the inner wall of the fixing box 3, and the bottom of the connecting panel 5 extends to the outside of the fixing box 3, the bottom of the connecting panel 5 is fixedly connected to the top of the control panel 4, the push rod 8 is rotationally connected to the front side of the connecting panel 5, the connecting rod 9 is fixedly connected to the bottom of the unlocking plate 10, and the front side of the connecting rod 9 is rotationally connected to the rear side of the push rod 8. When the control panel 4 moves, the connecting panel 5 will move left, and when the connecting panel 5 moves, the push rod 8 will be pushed. At this time, the movement of the push rod 8 will push the connecting rod 9 downward, and when the connecting rod 9 moves, the unlocking plate 10 will be driven downward, and when the unlocking plate 10 moves, the positioning plate 14 will be driven downward. The positioning plate 14 moves up and down to facilitate the fixing or unlocking of the dustproof net 2.

[0041] In this embodiment, the limiting mechanism includes: two push plates 18, two levers 21, two rotating rods 22, two hollow plates 23 and two plug plates 26; the two push plates 18 are respectively slidably connected to the right side of the corresponding sliding sleeve 16, the two levers 21 are fixedly connected to the left side of the corresponding push plates 18, the two rotating rods 22 are rotatably connected to one side of the corresponding sliding sleeve 16, the two rotating rods 22 are both hollow structures, the inner walls of the two rotating rods 22 are slidably connected to the outer walls of the corresponding levers 21, the two hollow plates 23 are respectively slidably connected to the side of the two sliding sleeves 16 away from each other, the tops of the two hollow plates 23 are connected to the bottoms of the corresponding rotating rods 22 The two plug plates 26 are connected by sliding connection, and the two plug plates 26 are fixedly connected to the left side of the corresponding hollow plate 23. A plurality of slots are symmetrically provided at equal intervals on the right side of the slide bar 15. The plug plates 26 are engaged with the slots. When the push plate 18 moves, the lever 21 is driven to move backward. The movement of the lever 21 pushes the rotating rod 22 to rotate. At this time, the rotation of the rotating rod 22 pushes the hollow plate 23 to move right. At this time, the movement of the hollow plate 23 drives the plug plates 26 to move right. At this time, the plug plates 26 move out of contact with the slots. The plug plates 26 move out of contact with the slots, which facilitates the unlocking of the sliding sleeve 16, thereby facilitating the adjustment of the position of the high-pressure paper-leading water needle 17 according to usage requirements.

[0042] In this embodiment, the inner wall of the fixed box 3 is fixedly connected with a limiting frame 6, the limiting frame 6 passes through the connecting plate 5, and the outer wall of the limiting frame 6 is sleeved with a limiting spring 7. The left side of the limiting spring 7 is fixedly connected to the outer wall of the limiting frame 6, and the right side of the limiting spring 7 is fixedly connected to the left side of the connecting plate 5. The limiting frame 6 is used to conveniently limit the connecting plate 5 so that the connecting plate 5 can move laterally. The elastic force of the limiting spring 7 can conveniently push the connecting plate 5 to move right and reset.

[0043] In this embodiment, a contact plate 11 is fixedly connected to the inner wall of the fixed box 3, and the top of the contact plate 11 is in movably contact with the bottom of the unlocking plate 10, and the bottom of the contact plate 11 is fixedly connected to the top of the limit frame 6. The top of the contact plate 11 is symmetrically fixedly connected with a limit rod 12, and the number of the limit rods 12 is two, and the two limit rods 12 both penetrate the unlocking plate 10. The limit rods 12 are used to limit the unlocking plate 10 so that the unlocking plate 10 can move stably. The contact plate 11 is used to limit the moving distance of the unlocking plate 10, and the contact plate 11 is used to support and fix the limit rod 12 so that the limit rod 12 remains stable during use.

[0044] In this embodiment, the inner wall of the fixed box 3 is symmetrically fixedly connected with a return spring 13, and the number of the return springs 13 is two, and the tops of the two return springs 13 are fixedly connected to the bottom of the unlocking plate 10. Through the elastic force of the return spring 13, it is convenient to push the unlocking plate 10 to move up and reset, thereby driving the positioning plate 14 to engage with the positioning groove.

[0045] In this embodiment, the two sliding sleeves 16 are fixedly connected to the sides away from each other with push springs 19, and the two push springs 19 are fixedly connected to the sides of the two push plates 18 close to each other. The elastic force of the push springs 19 facilitates the push plates 18 to move and reset.

[0046] In this embodiment, the outer walls of the two levers 21 are fixedly connected to the limit plate 20, and the sides of the two sliding sleeves 16 that are away from each other are fixedly connected to the guide plate 24. The guide plate 24 is a hollow structure, and the inner wall of the guide plate 24 is slidably connected to the outer wall of the plug plate 26. The right side of the guide plate 24 is fixedly connected to a positioning spring 25, and the right side of the positioning spring 25 is fixedly connected to the left side of the hollow plate 23. The limit plate 20 is used to conveniently limit the plug plate 26, so that the plug plate 26 can move laterally stably, which facilitates the plug plate 26 to engage with the slot. Through the elastic force of the positioning spring 25, the hollow plate 23 and the plug plate 26 can be conveniently driven to move laterally and engage with the slot.

[0047] Working principle: In actual use, the paper feeding device body 1 is placed in a suitable position, and the position of the high-pressure paper feeding water needle 17 is first adjusted according to the use requirements. When the position of the high-pressure paper feeding water needle 17 needs to be adjusted, the push plate 18 is first pushed to move backward. When the push plate 18 moves, the push spring 19 is compressed. At the same time, when the push plate 18 moves, it drives the lever 21 to move backward. The movement of the lever 21 drives the rotating rod 22 to rotate. At this time, the rotation of the rotating rod 22 drives the hollow plate 23 to move right. At this time, the movement of the hollow plate 23 stretches the positioning spring 25. At the same time, the movement of the hollow plate 23 drives the plug plate 26 to move right. The movement of the insert plate 26 will disengage from the slot, thereby unlocking the sliding sleeve 16 and the high-pressure paper-feeding water needle 17. At this time, the sliding sleeve 16 can be pushed to move, thereby driving the high-pressure paper-feeding water needle 17 to move. When the high-pressure paper-feeding water needle 17 moves to a suitable position, by releasing the push plate 18, the push spring 19 loses its restriction and pushes the push plate 18 to move forward and reset. The reset of the push plate 18 will drive the lever 21 to reset, thereby driving the rotating rod 22 to rotate and reset. At the same time, the positioning spring 25 loses its restriction and pulls the hollow plate 23 to move left and reset. At this time, the hollow plate 23 will drive the insert plate 26 to move left and engage with the slot to fix the sliding sleeve 16, thereby the high-pressure paper-feeding water needle 17 is moved to a suitable position. The paper-feeding water needle 17 is fixed at the current position, and the position of the high-pressure paper-feeding water needle 17 is adjusted to cut the paper. At this time, the dust-proof net 2 can be installed. At this time, the control board 4 is first pushed to move left. When the control board 4 moves, it will drive the connecting plate 5 to move left. When the connecting plate 5 moves, the limit spring 7 is compressed. The connecting plate 5 and the control board 4 can be limited by the limit frame 6. The movement of the connecting plate 5 will push the push rod 8. At this time, the movement of the push rod 8 will push the connecting rod 9 downward. When the connecting rod 9 moves, it will drive the unlocking plate 10 to move downward. When the unlocking plate 10 moves, it will compress the reset spring 13. At the same time, the unlocking plate 10 The movement will drive the positioning plate 14 to move downward, and the dustproof net 2 can be inserted into the paper feeding device body 1 at this time, and the positioning groove is aligned with the positioning plate 14. At this time, the control plate 4 is released, and the limit spring 7 pushes the connecting plate 5 to move right and reset. The reset of the connecting plate 5 will drive the control plate 4 to reset, and the connecting plate 5 will drive the push rod 8 to reset. At the same time, the reset spring 13 loses its restriction and pushes the unlocking plate 10 to move upward. The upward movement of the unlocking plate 10 will drive the positioning plate 14 to move upward and engage with the positioning groove to fix the dustproof net 2, thereby achieving the effect of installing the dustproof net 2, and preventing dust and the like from entering the paper feeding device body 1 through the dustproof net 2.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic paper threading device for a paper machine, comprising a paper threading device body (1), a dustproof net (2) and a high-pressure paper threading water needle (17), characterized in that: The dustproof net (2) is movably connected to the inner wall of the paper guiding device body (1), and the front side of the dustproof net (2) extends to the outside of the paper guiding device body (1). The front side of the paper guiding device body (1) is fixedly connected to a fixing box (3), and the inner wall of the fixing box (3) is slidably connected to an unlocking plate (10). The top of the unlocking plate (10) is symmetrically fixedly connected to a positioning plate (14), and the number of the positioning plates (14) is two. The bottom of the dustproof net (2) is symmetrically provided with positioning grooves, and the number of the positioning grooves is two. A positioning plate (14) is engaged with a corresponding positioning groove, a fixing mechanism is provided on the inner wall of the fixing box (3), a sliding rod (15) is fixedly connected to the inner wall of the paper feeding device body (1), a sliding sleeve (16) is symmetrically slidably connected to the outer wall of the sliding rod (15), and the number of the sliding sleeves (16) is two, the number of the high-pressure paper feeding water needles (17) is two, the two high-pressure paper feeding water needles (17) are fixedly connected to the left side of the corresponding sliding sleeves (16), and a limiting mechanism is provided on the side of the two sliding sleeves (16) away from each other.

2. The automatic paper threading device for a paper machine according to claim 1, characterized in that: The fixing mechanism comprises: a control plate (4), a connecting plate (5), a push rod (8) and a connecting rod (9); The control panel (4) is slidably connected to the bottom of the fixed box (3), the connecting plate (5) is slidably connected to the inner wall of the fixed box (3), and the bottom of the connecting plate (5) extends to the outside of the fixed box (3), the bottom of the connecting plate (5) is fixedly connected to the top of the control panel (4), the push rod (8) is rotatably connected to the front side of the connecting plate (5), the connecting rod (9) is fixedly connected to the bottom of the unlocking plate (10), and the front side of the connecting rod (9) is rotatably connected to the rear side of the push rod (8).

3. The automatic paper threading device for a paper machine according to claim 1, characterized in that: The limiting mechanism comprises: two push plates (18), two shift rods (21), two rotating rods (22), two hollow plates (23) and two plug plates (26); The two push plates (18) are respectively slidably connected to the right side of the corresponding sliding sleeve (16), the two shifting rods (21) are fixedly connected to the left side of the corresponding push plates (18), the two rotating rods (22) are rotatably connected to one side of the corresponding sliding sleeve (16), the two rotating rods (22) are both hollow structures, the inner walls of the two rotating rods (22) are slidably connected to the outer walls of the corresponding shifting rods (21), the two hollow plates (23) are respectively slidably connected to the sides of the two sliding sleeves (16) away from each other, the tops of the two hollow plates (23) are slidably connected to the bottoms of the corresponding rotating rods (22), the two plugging plates (26) are fixedly connected to the left side of the corresponding hollow plates (23), and a plurality of slots are symmetrically provided on the right side of the sliding rod (15) at equal intervals, and the plugging plates (26) are engaged with the slots.

4. The automatic paper threading device for a paper machine according to claim 1, characterized in that: The inner wall of the fixed box (3) is fixedly connected to a limiting frame (6), the limiting frame (6) passes through the connecting plate (5), the outer wall of the limiting frame (6) is sleeved with a limiting spring (7), the left side of the limiting spring (7) is fixedly connected to the outer wall of the limiting frame (6), and the right side of the limiting spring (7) is fixedly connected to the left side of the connecting plate (5).

5. The automatic paper threading device for a paper machine according to claim 1, characterized in that: A contact plate (11) is fixedly connected to the inner wall of the fixed box (3); the top of the contact plate (11) is in movable contact with the bottom of the unlocking plate (10); the bottom of the contact plate (11) is fixedly connected to the top of the limiting frame (6); the top of the contact plate (11) is symmetrically fixedly connected to limiting rods (12); and the number of the limiting rods (12) is two, and both limiting rods (12) penetrate the unlocking plate (10).

6. The automatic paper threading device for a paper machine according to claim 1, characterized in that: The inner wall of the fixed box (3) is symmetrically fixedly connected with a return spring (13), and the number of the return springs (13) is two, and the tops of the two return springs (13) are fixedly connected to the bottom of the unlocking plate (10).

7. The automatic paper threading device for a paper machine according to claim 1, characterized in that: The sides of the two sliding sleeves (16) that are away from each other are both fixedly connected with a push spring (19), and the sides of the two push springs (19) that are away from each other are respectively fixedly connected to the sides of the two push plates (18) that are close to each other.

8. The automatic paper threading device for a paper machine according to claim 3, characterized in that: The outer walls of the two levers (21) are fixedly connected to the limit plate (20), and the two sliding sleeves (16) are fixedly connected to the guide plate (24) on the sides away from each other. The guide plate (24) is a hollow structure, and the inner wall of the guide plate (24) is slidably connected to the outer wall of the plug plate (26). The right side of the guide plate (24) is fixedly connected to a positioning spring (25), and the right side of the positioning spring (25) is fixedly connected to the left side of the hollow plate (23).

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