A special tool for paper machine doctor blade extraction

Abstract

The utility model provides a kind of special tool for paper machine doctor blade extraction, it solves the problem of inconvenient extraction of paper machine doctor blade, it includes a pair of articulated pincer body, and the front end of pincer body is provided with clamping assembly, and the rear end of pincer body is connected with extension handle, and the articulated place between the end of extension handle and pincer body is provided with linkage assembly, and linkage assembly is transmission connection with clamping assembly.The utility model has the advantages of convenient extraction, stable structure and the like.

Description

Technical Field

[0001] This utility model belongs to the field of paper machine maintenance technology, specifically relating to a special tool for removing paper machine doctor blades. Background Technology

[0002] In the daily operation and maintenance of papermaking machinery, the doctor blade is a key component used to remove residual pulp, moisture, or impurities from the surfaces of equipment such as drying cylinders and pressure rolls, ensuring paper quality and normal equipment operation. Regular disassembly and replacement of the doctor blade are necessary maintenance procedures. Currently, when disassembling the doctor blade, operators use hooks to pull it by hooking it through the pre-drilled holes at the end, or use pliers to clamp the blade body, often requiring the use of ropes, levers, or other auxiliary tools to increase pulling force and operating distance. When the doctor blade has been in the clamp for an extended period, it can develop severe adhesion, corrosion, or jamming due to accumulated pulp, chemicals, moisture, and other contaminants. At this point, the friction between the doctor blade and the clamp is extremely high. Using a hook to pull it concentrates the force highly at the vulnerable holes of the doctor blade, easily causing the holes to tear or break, while the doctor blade itself remains stuck, further complicating subsequent handling.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a novel scraper blade extractor [202222087085.4], in which a handle A is horizontally installed at the upper end of a hollow tube; a sleeve is provided on the outside of the lifting hole, and a handle B is horizontally installed at the sleeve; a pull rod is provided inside the hollow tube, with the top of the pull rod connected to the handle B and the bottom of the pull rod connected to a spring; a clamp-shaped seat is connected to the bottom of the hollow tube; a limiting member is installed on the clamp-shaped seat, with the upper end of the limiting member connected to a spring, and two push rods are provided at the lower end of the limiting member; a claw wheel is provided between the clamp-shaped seats in front of the two push rods.

[0004] The above solution has solved the problem of scraper extraction to some extent, but it still has many shortcomings, such as the fact that the scraper is easily damaged when using a hook-and-pull method. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed special tool for removing paper machine doctor blades that can effectively protect the doctor blades.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a special tool for removing paper machine scrapers, comprising a pair of hinged clamping bodies, a clamping component at the front end of the clamping bodies, an extension handle connected to the rear end of the clamping bodies, a linkage component between the end of the extension handle and the hinge of the clamping bodies, and the linkage component being connected to the clamping component in a transmission manner.

[0007] In the aforementioned paper machine doctor blade extraction tool, the linkage assembly includes a linkage handle movably installed at the end of an extension handle, an elastic reset component is provided between the linkage handle and the extension handle, a linkage rod is slidably installed inside the extension handle, and a linkage component is provided between the linkage handle and the linkage rod to drive the linkage rod to slide relative to the extension handle when the linkage is pressed.

[0008] In the aforementioned paper machine doctor blade extraction tool, the clamping assembly includes a clamping part with a flat structure located at the front end of the clamping body, and the inner side of the clamping part is provided with pressure stripes and an anti-slip coating.

[0009] In the aforementioned paper machine scraper extraction tool, a receiving groove is provided on the outer side of the clamping part, and a flip-up hook is installed in the receiving groove. A transmission component is provided between the hook and the linkage rod to push the hook to flip outward.

[0010] In the aforementioned paper machine doctor blade extraction tool, the end of the extended handle is covered with a gripping part, and the gripping part is provided with anti-slip ribs.

[0011] In the aforementioned paper machine scraper extraction tool, a rigid retaining ring is movably connected to the end of the gripping part, and the retaining ring is engaged with the gripping part of another extension handle.

[0012] In the aforementioned paper machine scraper extraction tool, a flexible pull rope is connected to the end of the gripping part.

[0013] In the aforementioned paper machine doctor blade extraction tool, a limiting groove and a limiting strip that interlock are provided on opposite sides of the extension handle, with the limiting groove and the limiting strip extending axially along the extension handle.

[0014] In the aforementioned paper machine scraper extraction tool, the clamp body and the extension handle are integrally formed and made of stainless steel.

[0015] In the aforementioned special tool for extracting paper machine doctor blades, a reinforcing part is provided at the hinge of the clamp body, and the reinforcing part is integrally formed with the clamp body.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: it can switch between the clamp body and the hook body as needed, and uses a clamping method to fix the puller, reducing damage to the puller; the fixing ring at the end of the gripping part ensures that the extension handles are stable during the pulling process, and avoids separation that affects the pulling force; the limiting groove and limiting strip between the two extension handles are interlocked to prevent the two handles from shifting laterally during the application of force, ensuring the stability of the clamping and the accuracy of the force direction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a structural schematic diagram from another perspective of the present invention; Figure 4 This is a partial sectional view of the present invention; Figure 5 This is another partial sectional view of the present invention; In the figure, the clamp body is 1, the clamping assembly is 2, the clamping part is 21, the pressure strip is 22, the receiving groove is 23, the pull hook is 24, the transmission component is 25, the extension handle is 3, the grip part is 31, the anti-slip rib is 32, the fixing ring is 33, the pull rope is 34, the limiting groove is 35, the limiting strip is 36, the linkage assembly is 4, the linkage handle is 41, the linkage rod is 42, and the linkage component is 43. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-5 As shown, a special tool for removing paper machine doctor blades includes a pair of hinged clamping bodies 1. A clamping component 2 is located at the front end of each clamping body 1, and an extension handle 3 is connected to the rear end of each clamping body 1. A linkage component 4 is located between the end of the extension handle 3 and the hinge point of the clamping body 1, and the linkage component 4 is kinetically connected to the clamping component 2. This design enables remote operation through the linkage component 4, allowing the user to easily control the clamping component 2 while holding the extension handle 3, flexibly switching between clamping and hooking states. It is particularly suitable for doctor blade removal operations in narrow or deep spaces, improving operational convenience and safety.

[0020] Specifically, the linkage assembly 4 includes a linkage handle 41 movably mounted at the end of the extension handle 3. A spring or other elastic reset element is provided between the linkage handle 41 and the extension handle 3. A linkage rod 42 is slidably mounted inside the extension handle 3. A linkage element 43 is provided between the linkage handle 41 and the linkage rod 42, which slides relative to the extension handle 3 when pressed. The linkage element 43 typically employs a linkage or cam structure. When the user presses the linkage handle 41, the elastic reset element is compressed, and the linkage element 43 transmits motion to the linkage rod 42, causing it to slide axially along the extension handle 3, thereby driving the clamping assembly 2 to move. This design achieves the amplification effect of the lever principle, reducing the operating force. Simultaneously, the elastic reset element ensures that the linkage handle 41 automatically resets after release, improving the tool's responsiveness and reliability.

[0021] Specifically, the clamping assembly 2 includes a flat clamping portion 21 located at the front end of the clamping body 1. The inner side of the clamping portion 21 is provided with pressure stripes 22 and an anti-slip coating. The flat clamping portion 21 facilitates insertion into the gap between the scraper and the equipment, while the pressure stripes 22 and the anti-slip coating together enhance the clamping force, preventing the scraper from slipping during extraction. The pressure stripes 22 increase the friction of the contact surface, dispersing the clamping pressure, while the anti-slip coating provides additional gripping effect, suitable for wet or oily environments.

[0022] Furthermore, a receiving groove 23 is provided on the outer side of the clamping part 21. A flip-up hook 24 is installed in the receiving groove 23. A transmission component 25 is provided between the hook 24 and the linkage rod 42 to push the hook 24 to flip outward. The transmission component 25 is usually a hinged linkage or a slider mechanism. When the linkage rod 42 slides, the transmission component 25 pushes the hook 24 to flip out of the receiving groove 23, forming a hook-like structure for hooking the hole or edge of the scraper to assist in the pull-out operation. The hook 24 can be stored in the receiving groove 23 when not in use, avoiding interference with the clamping function and improving the tool's versatility and compactness.

[0023] Furthermore, the end of the extension handle 3 is covered with a grip portion 31, on which anti-slip ribs 32 are provided. The grip portion 31 is usually made of rubber or soft plastic, and the anti-slip ribs 32 are raised stripes or grid patterns, which increase the friction between the hand and the tool and prevent slippage during operation. Especially in high humidity or high-intensity use scenarios, it can effectively improve grip comfort and control precision.

[0024] In addition, a rigid retaining ring 33 is movably connected to the end of the grip portion 31, and the retaining ring 33 engages with the grip portion 31 of another extension handle 3. The retaining ring 33 is typically made of metal or high-strength plastic and connects the two extension handles 3 by a snap or magnetic attraction, allowing the tool to be secured together during storage or transport to prevent the extension handles 3 from separating. Simultaneously, a flexible pull cord 34 is connected to the end of the grip portion 31. The pull cord 34 can be made of nylon or braided straps, used to suspend the tool on the wrist or a fixed point to prevent accidental drops and for easy access during high-altitude or mobile operations.

[0025] As can be seen, the opposite sides of the extension handle 3 have interlocking limiting grooves 35 and limiting strips 36, which extend axially along the extension handle 3. The cooperation of the limiting grooves 35 and limiting strips 36 ensures that the two extension handles 3 remain aligned when closed, preventing relative rotation or misalignment, thereby improving the stability and operating accuracy of the tool. This design also prevents component deformation or failure when large forces are applied.

[0026] Clearly, the clamp body 1 and the extension handle 3 are integrally molded and made of stainless steel. This integral molding structure eliminates weak points at the connection points, improving overall strength and durability, making it suitable for high-load industrial environments. The stainless steel material provides excellent corrosion resistance and hardness, ensuring that the tool will not rust or wear during long-term use under humid, high-temperature, or chemically exposed conditions.

[0027] Preferably, a reinforcing part 11 is provided at the hinge of the clamp body 1. The reinforcing part 11 is usually a thickened or ribbed structure, which concentrates the stress at the hinge point, prevents fatigue cracks caused by repeated opening and closing, and extends the service life of the tool. The one-piece molding ensures a seamless connection between the reinforcing part 11 and the clamp body 1, further improving the structural integrity.

[0028] In summary, the principle of this embodiment is as follows: the operator holds the gripping part 31 and inserts the clamping part 21 between the scraper and the roller. Pressing the extension handle 3 causes the clamping assembly 2 to clamp the scraper, while the anti-slip coating and pressure stripes 22 prevent slippage. Then, the scraper is pulled out by pulling the extension handle 3. The pull hook 24 can be flipped over by the linkage assembly 4 when needed to hook onto the scraper hole and assist in pulling it out.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0030] Although this document frequently uses terms such as clamp body 1, clamping assembly 2, clamping part 21, pressure stripe 22, receiving groove 23, pull hook 24, transmission component 25, extension handle 3, grip part 31, anti-slip rib 32, fixing ring 33, pull rope 34, limiting groove 35, limiting strip 36, linkage assembly 4, linkage handle 41, linkage rod 42, and linkage component 43, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A special tool for paper machine blade extraction, comprising a pair of hinged jaw bodies (1), characterized in that, The clamp body (1) is provided with a clamping component (2) at the front end and an extension handle (3) is connected to the rear end of the clamp body (1). A linkage component (4) is provided between the end of the extension handle (3) and the hinge of the clamp body (1). The linkage component (4) is connected to the clamping component (2) in a transmission manner.

2. A special tool for paper machine blade extraction according to claim 1, characterized in that, The linkage component (4) includes a linkage handle (41) movably installed at the end of the extension handle (3), an elastic reset member is provided between the linkage handle (41) and the extension handle (3), a linkage rod (42) is slidably installed inside the extension handle (3), and a linkage member (43) is provided between the linkage handle (41) and the linkage rod (42) to drive the linkage rod (42) to slide relative to the extension handle (3) when the linkage is pressed.

3. A special tool for paper machine blade extraction according to claim 2, characterized in that, The clamping assembly (2) includes a clamping part (21) with a flat structure disposed at the front end of the clamping body (1). The clamping part (21) has pressure stripes (22) and an anti-slip coating on its inner side.

4. A special tool for paper machine blade extraction according to claim 3, characterized in that, The clamping part (21) has a receiving groove (23) on the outside. A flip-up hook (24) is installed in the receiving groove (23). A transmission component (25) is provided between the hook (24) and the linkage rod (42) to push the hook (24) to flip outward.

5. A special tool for paper machine blade extraction according to claim 1, characterized in that, The end of the extension handle (3) is covered with a grip (31), and the grip (31) is provided with anti-slip ribs (32).

6. A special tool for paper machine blade extraction according to claim 5, characterized in that, The end of the grip (31) is movably connected to a rigid retaining ring (33), which engages with the grip (31) of another extension handle (3).

7. A special tool for paper machine blade extraction according to claim 5, characterized in that, The end of the grip (31) is connected to a flexible material pull rope (34).

8. A special tool for paper machine blade extraction according to claim 1, characterized in that, The extension handle (3) has a limiting groove (35) and a limiting strip (36) that are interlocked on opposite sides. The limiting groove (35) and the limiting strip (36) extend along the axial direction of the extension handle (3).

9. A special tool for paper machine blade extraction according to claim 1, characterized in that, The clamp body (1) and the extension handle (3) are integrally formed and made of stainless steel.

10. A special tool for paper machine blade extraction according to claim 1, characterized in that, The clamp body (1) is provided with a reinforcing part at the hinge, and the reinforcing part is integrally formed with the clamp body (1).

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