A high-precision weaving equipment for papermaking wire processing

Abstract

The application relates to the technical field of looms, in particular to a high-precision weaving equipment for papermaking net processing, which comprises a conjugate cam, a driven swing arm, a J-shaped connecting rod, a sword-transmitting connecting rod, a sector gear, a double gear, a sword-guiding wheel and a sword in sequence in the conjugate cam weft guiding mechanism, the sword-transmitting connecting rod comprises a first connecting rod hinged to the J-shaped connecting rod and a second connecting rod hinged to the sector gear, the first connecting rod is telescopically connected with the second connecting rod and is formed with a telescopic cavity, a pre-pressing piece is arranged in the telescopic cavity, the pre-pressing piece has a pre-pressing force along the telescopic direction of the sword-transmitting connecting rod, the pre-pressing force is greater than or equal to the weft guiding force of the conjugate cam weft guiding mechanism, the first connecting rod pushes the second connecting rod through the pre-pressing piece, a one-way pull-back assembly is connected between the first connecting rod and the second connecting rod, and the first connecting rod pulls the second connecting rod through the one-way pull-back assembly. The application provides the active overload protection effect and effectively solves the problem that the structural stress in the mechanism is sharply increased once the movement of the sword is blocked.

Description

Technical Field

[0001] This invention relates to the field of loom technology, and in particular to a weaving equipment for high-precision papermaking wire processing. Background Technology

[0002] High-precision papermaking wire is a core dewatering element in papermaking. Its surface flatness, weft uniformity, and wear resistance directly affect paper uniformity and paper machine operating efficiency. This type of wire typically uses monofilament or multifilament structures with high warp and weft density and strict weaving tolerances, placing high demands on yarn tension, weft insertion position, and weft yarn splicing accuracy during the weaving process. To achieve this precision, the weaving equipment needs the following components: a yarn frame provides low-tension yarn that is simultaneously unwound from multiple bobbins; the warping mechanism forms evenly arranged warp sheets and winds them onto the warp beam; the warp beam serves as the yarn supply unit connected to the loom; the loom must be equipped with a high-rigidity shedding mechanism, a precision weft yarn selector, and auxiliary weft insertion guiding elements; edge supports and trimming devices are provided on both sides of the fabric surface; and finally, a constant take-up tension is maintained by a crimping roller.

[0003] In wide-width, high-density papermaking web weaving, the mainstream method is rapier weft insertion, where the weft yarn is introduced into the shed through the intersection of two rapiers. Existing high-speed rapier looms mostly employ a conjugate cam weft insertion mechanism, consisting of a main cam and a return cam, which drive the rapier's forward weft feeding and return movements respectively. However, due to yarn burrs, minor knots, unclear warp openings, or other special circumstances, the rapier head can be momentarily blocked within the shed. Therefore, existing papermaking web weaving equipment using conjugate cam weft insertion mechanisms still faces a certain risk of overload during actual operation. Traditional conjugate cam weft insertion mechanisms use mechanical closed constraints and lack active overload protection. Once the rapier movement is obstructed, the contact stress between the cam and the driven component increases sharply. This can lead to the weft insertion driving torque exceeding the limit and causing the loom to stop, or even cause cam profile abrasion, needle roller bearing breakage, or even rapier bending and deformation, severely affecting the efficiency of continuous papermaking web weaving and the lifespan of the equipment. Summary of the Invention

[0004] To address the problem that when the rapier's movement is obstructed, the contact stress between the cam and the follower increases sharply, which can lead to the loom stopping due to excessive weft insertion torque, or even causing cam profile abrasion, needle roller bearing breakage, or even rapier bending and deformation, severely affecting the continuous weaving efficiency and equipment lifespan of papermaking webs, this application provides a high-precision papermaking web processing weaving device.

[0005] The high-precision papermaking wire mesh processing weaving equipment provided by this invention adopts the following technical solution: A high-precision papermaking wire mesh processing weaving device includes a conjugate cam weft insertion mechanism, characterized in that: the conjugate cam weft insertion mechanism includes a conjugate cam, a driven swing arm, a J-shaped connecting rod, a scissor connecting rod, a sector gear, a double gear, a scissor wheel, and a scissor rod connected sequentially along the power transmission sequence; the scissor connecting rod includes a first connecting rod hinged to the J-shaped connecting rod and a second connecting rod hinged to the sector gear; the first connecting rod and the second connecting rod are telescopically connected and form a telescopic cavity, the telescopic cavity is provided with a pre-compression member, the pre-compression member has a pre-pressure along the telescopic direction of the scissor connecting rod, the pre-pressure is greater than or equal to the weft insertion force of the conjugate cam weft insertion mechanism, the first connecting rod pushes the second connecting rod through the pre-compression member; a one-way pull-back assembly is connected between the first connecting rod and the second connecting rod, the first connecting rod pulls the second connecting rod through the one-way pull-back assembly.

[0006] Preferably, the end of the first connecting rod facing the second connecting rod is provided with a telescopic rod, and the end of the second connecting rod facing the first connecting rod is provided with a telescopic groove. The telescopic rod is inserted into the telescopic groove, and the telescopic cavity is formed between the inner end of the telescopic rod and the inner end of the telescopic groove.

[0007] Preferably, the pre-compression component is a pre-compression spring, one end of which is connected to the inner end of the telescopic rod, and the other end of which is connected to the inner end of the telescopic groove.

[0008] Preferably, the unidirectional pull-back assembly includes a locking block and a locking groove. The locking block is radially elastically disposed on the side wall of the telescopic rod, and the locking groove is formed on the side wall of the telescopic groove. The locking block is a wedge-shaped block, and the locking block is engaged with the locking groove along the extension direction of the transmission connecting rod.

[0009] Preferably, an adjusting block is provided at the inner end of the telescopic groove, and the preload spring is connected to the inner end of the telescopic groove by connecting the adjusting block. The adjusting block is connected to a control component, and the control component adjusts the preload of the preload spring by controlling the movement of the adjusting block.

[0010] Preferably, the conjugate cam weft insertion mechanism includes a housing, in which the conjugate cam, driven swing arm, J-shaped connecting rod, transmission connecting rod, sector gear, and double gear are all disposed. Multiple lubrication nozzles are disposed within the housing, and these nozzles are connected to a lubrication system for lubricating multiple structures within the housing. The side wall of the telescopic rod has an installation groove for mounting the locking block. A distance sensor is disposed at the bottom of the installation groove, and the distance sensor is signal-connected to the lubrication nozzles. When the distance sensor detects that the distance between the locking block and the bottom of the installation groove is less than a threshold, it controls the lubrication nozzles to perform one oil spray.

[0011] Preferably, if the distance sensor triggers the lubrication nozzle to spray oil multiple times consecutively within a unit time, the weaving equipment shall be stopped for inspection.

[0012] Preferably, the control component is a manual control component, which includes a screw rod, a push block, and a push block. The screw rod is connected to the second connecting rod along a transverse thread. The screw rod includes an outer end extending out of the second connecting rod and an inner end extending into the second connecting rod. The push block is rotatably connected to the inner end of the screw rod and is laterally slidably disposed within the second connecting rod. The push block has a push inclined surface. The push block is connected to the adjusting block and is longitudinally slidably disposed within the second connecting rod. The push block has a push inclined surface, and the push inclined surface abuts against the push inclined surface.

[0013] Preferably, the control component is an electric control component, which is an electric cylinder connected to the adjusting block.

[0014] Preferably, a temperature sensor is installed inside the chamber, and the temperature sensor is signal-connected to the control component. The control component controls the adjusting block to move in the direction of releasing pre-pressure as the temperature inside the chamber increases.

[0015] The beneficial effects of this invention are as follows: When the conjugate cam weft insertion mechanism is not overloaded, the preload of the preload spring is greater than or equal to the weft insertion force. At this time, the first link of the rapier connecting rod will push the second link through the near-rigid preload spring and pull the second link through the one-way pullback assembly, thereby ultimately controlling the back-and-forth movement of the rapier and continuously inserting weft. When the conjugate cam weft insertion mechanism is overloaded, the weft insertion force will be greater than the preload of the preload spring, causing the preload spring to be further compressed, causing the rapier connecting rod to contract. This solves the problem that once the rapier movement is obstructed, the contact stress between the cam and the follower increases sharply. At best, this will cause the weft insertion driving torque to exceed the limit and stop the loom. At worst, it will cause cam profile abrasion, needle roller bearing breakage, or even rapier bending and deformation, seriously affecting the continuous weaving efficiency and equipment life of the papermaking web. Attached Figure Description

[0016] Figure 1 This is a component block diagram of the weaving equipment for high-precision papermaking wire processing in Example 1; Figure 2 This is a frontal view of the internal structure of the conjugate cam weft insertion mechanism in Example 1; Figure 3 This is a top-view cross-sectional structural diagram of the conjugate cam weft insertion mechanism in Example 1. Figure 4 This is a partial structural cross-sectional view of the sword-transmitting connecting rod in Embodiment 1; Figure 5This is a partial structural cross-sectional view of the transmission link in Embodiment 2.

[0017] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Conjugate cam; 12. Driven swing arm; 13. J-shaped connecting rod; 14. Sword transmission connecting rod; 15. Sector gear; 16. Double gear; 17. Sword guide wheel; 18. Sword shaft; 21. First connecting rod; 22. Second connecting rod; 23. Preload spring; 24. Adjusting block; 31. Locking block; 32. Locking groove; 33. Mounting groove; 34. Guide groove; 35. Guide rod; 36. Locking spring; 37. Distance sensor; 41. Tightening rod; 42. Pushing block; 43. Pushed block; 5. Electric cylinder. Detailed Implementation

[0018] The following will combine Figures 1-5 The present invention will be further illustrated by the embodiments.

[0019] Example 1 This embodiment discloses a weaving device for high-precision papermaking wire processing.

[0020] Reference Figure 1 High-precision papermaking web processing weaving equipment includes a warping mechanism, a warp feeding mechanism, a shedding mechanism, a weft insertion mechanism, a beat-up mechanism, a side support and width expansion mechanism, and a take-up mechanism. The warping mechanism is used for warp yarn arrangement, width setting, and uniform tension. The warp feeding mechanism feeds the warp yarn at a constant speed. The shedding mechanism layers the warp yarns to form the weaving shed. The weft insertion mechanism introduces the weft yarn into the shed. The beat-up mechanism pushes the weft yarn towards the weft end to form a dense web surface. The side support and width expansion mechanism forms a stable width and prevents fabric edge curling and shrinkage. The take-up mechanism continuously pulls and takes up the woven paper web. Additionally, it includes a tension control system, a safety stop system, and a transmission and synchronization control system. The tension control system maintains stable warp / weft tension. The safety stop system stops the machine when warp / weft breakage or other emergency situations are detected. The transmission and synchronization control system ensures that shedding, weft insertion, and beat-up movements are synchronized.

[0021] Reference Figure 2 and Figure 3 In this invention, the weft insertion mechanism is a conjugate cam weft insertion mechanism, which includes a housing 1 and a conjugate cam 11, a driven swing arm 12, a J-shaped connecting rod 13, a sword transmission connecting rod 14, a sector gear 15, a double gear 16, a sword-guiding wheel 17, and a sword rod 18 connected in sequence along the power transmission sequence. The conjugate cam 11, the driven swing arm 12, the J-shaped connecting rod 13, the sword transmission connecting rod 14, the sector gear 15, and the double gear 16 are located inside the housing 1, while the sword-guiding wheel 17 and the sword rod 18 are located outside the housing 1.

[0022] Reference Figure 2 and Figure 3The conjugate cam 11 is coaxially connected to a camshaft, and an external drive component is connected to the camshaft to drive the conjugate cam 11 to rotate continuously. The conjugate cam 11 includes an axially distributed main cam and a return cam. The main cam is responsible for driving the rapier 18 forward and for the weft insertion stroke, while the return cam is responsible for driving the rapier 18 back and for the reset stroke. The return cam and the main cam form a conjugate constraint. Correspondingly, the driven swing arm 12 is provided with a front roller and a rear roller. The two rollers maintain rolling contact with the contours of the main cam and the return cam, respectively, forming a backlash-free conjugate transmission pair, thereby driving the driven swing arm 12 to reciprocate.

[0023] Reference Figure 2 and Figure 3 Two bolts are spaced apart on the driven swing arm 12, with the gap between the two bolts allowing one end of the J-shaped connecting rod 13 to pass through. The two bolts maintain a sliding contact with that end of the J-shaped screw. Both ends of the transmission connecting rod 14 are hinged. One end of the transmission connecting rod 14 is hinged to the J-shaped connecting rod 13, and the other end is hinged to the sector gear 15. The hinge position with the sector gear 15 is offset from the rotation center of the sector gear 15. The sector gear 15 is connected to a first gear shaft, which is parallel to the cam shaft.

[0024] Reference Figure 2 and Figure 3 The double gear 16 is connected to a second gear shaft, which is parallel to the first gear shaft. The double gear 16 includes a main gear and a first bevel gear distributed axially. The main gear meshes with the sector gear 15 for transmission. The guide wheel 17 is connected to a third gear shaft, which intersects the second gear shaft perpendicularly. The guide wheel 17 is located at the outer end of the third gear shaft. A second bevel gear is provided at the inner end of the third gear shaft, which meshes with the first bevel gear for transmission. Furthermore, the rapier 18 meshes with the guide wheel 17. Finally, the continuous rotational motion of the conjugate cam 11 is sequentially converted into the linear reciprocating motion of the rapier 18 through the driven swing arm 12, the J-shaped connecting rod 13, the rapier transmission connecting rod 14, the sector gear 15, the double gear 16, and the guide wheel 17, thereby continuously performing weft insertion.

[0025] Due to yarn burrs, minor knots, unclear warp openings, or other special circumstances, the rapier 18 head may be momentarily blocked in the shed. If there is no active overload protection mechanism, once the movement of the rapier 18 is obstructed, the contact stress between the cam and the driven component will increase sharply. This can lead to the weft insertion driving torque exceeding the limit and causing the loom to stop, or even cause cam profile abrasion, needle roller bearing breakage, or even bending and deformation of the rapier 18, which seriously affects the continuous weaving efficiency of the papermaking web and the life of the equipment. Therefore, the present invention also makes the following improvements.

[0026] Reference Figure 4The sword-transferring link 14 includes a telescopically connected first link 21 and second link 22. The sword-transferring link 14 is hinged to a J-shaped link 13 via the first link 21 and to a sector gear 15 via the second link 22. A telescopic rod is provided at the end of the first link 21 facing the second link 22, and a telescopic groove is provided at the end of the second link 22 facing the first link 21. Both the telescopic rod and the telescopic groove have circular cross-sections. When the telescopic rod extends into the telescopic groove, the first link 21 and the second link 22 are telescopically connected, forming a telescopic cavity between the inner end of the telescopic rod and the inner end of the telescopic groove. A pre-compression member is provided within the telescopic cavity, and the pre-compression member has a preload along the telescopic direction of the sword-transferring link 14. In this embodiment, the pre-compression member is a preload spring 23. The preload of the preload spring 23 is greater than or equal to the weft insertion force of the conjugate cam weft insertion mechanism. The weft insertion force refers to the driving force required for the rapier 18 to clamp the weft yarn forward. When the conjugate cam weft insertion mechanism normally introduces the weft yarn into the shed, the preload spring 23 in the rapier connecting rod 14 can act as a rigid body to transmit the driving force. That is, the first connecting rod 21 pushes the second connecting rod 22 through the preload spring 23, which ultimately causes the rapier 18 to clamp the weft yarn forward.

[0027] Reference Figure 4 A one-way pull-back assembly connects the first link 21 and the second link 22. The first link 21 pulls the second link 22 through the one-way pull-back assembly, thereby controlling the sword rod 18 to retract and reset. Specifically, the one-way pull-back assembly includes a locking block 31 and a locking groove 32. The locking block 31 is radially elastically disposed on the side wall of the telescopic rod, meaning that the locking block 31 can be radially ejected outward under elastic force and radially retracted inward under external force. The locking groove 32 is formed on the side wall of the telescopic groove and is used for the locking block 31 to engage. Furthermore, the locking block 31 is a wedge-shaped block, which engages with the slot 32 along the extension direction of the connecting rod 14. This allows the locking block 31 to restrict the extension of the first connecting rod 21 and the second connecting rod 22, without restricting their shortening. Ultimately, this ensures that the first connecting rod 21 can pull the second connecting rod 22 back synchronously during the return stroke, and also ensures that when the resistance of the scissor 18 is overloaded, the preload spring 23 between the first connecting rod 21 and the second connecting rod 22 can be further compressed to prevent a sharp increase in structural stress, thus providing overload protection for the conjugate cam weft insertion mechanism. In addition, multiple air holes are provided in the telescopic cavity to maintain the air pressure balance inside and outside the telescopic cavity, and the guides for electrical components can also be led out through the air holes.

[0028] Since there are differences in parameters such as weft yarn type and weft yarn tension when weaving different papermaking webs, in order to ensure that the preload of the preload spring is always greater than or equal to the weft insertion force, the preload of the preload spring 23 needs to be adjusted according to the changes in the above parameters. Therefore, the present invention also includes the following improvements.

[0029] Reference Figure 4An adjusting block 24 is provided at the inner end of the telescopic groove. The adjusting block 24 is longitudinally movable to the sword-transfer rod 14. The preload spring 23 is connected to the inner end of the telescopic groove by connecting the adjusting block 24. In this embodiment, the telescopic direction parallel to the sword-transfer rod 14 is defined as longitudinal, and the telescopic direction perpendicular to the sword-transfer rod 14 is defined as transverse. Furthermore, the adjusting block 24 is connected to a control component. The control component adjusts the preload of the preload spring 23 by controlling the longitudinal movement of the adjusting block 24. When the adjusting block 24 moves away from the telescopic rod, it reduces the preload of the preload spring 23. When the adjusting block 24 moves closer to the telescopic rod, it increases the preload of the preload spring 23.

[0030] Reference Figure 4 In this embodiment, the control component is a manual control component, including a screw rod 41, a push block 42, and a push block 43. The screw rod 41 is threadedly connected to the second connecting rod 22 in a transverse direction. The screw rod 41 includes an outer end extending out of the second connecting rod 22 and an inner end extending into the second connecting rod 22. The screw rod 41 can be rotated to screw in or out laterally along the second connecting rod 22. The push block 42 is rotatably connected to the inner end of the screw rod 41 and is laterally slidably disposed within the second connecting rod 22, so that the push block 42 slides laterally due to the screwing in or out of the screw rod 41. The push block 43 is fixedly connected to the adjusting block 24 and is longitudinally slidably disposed within the second connecting rod 22. Furthermore, the push block 42 has a push inclined surface, and the push block 43 has a push inclined surface, with the push inclined surface and the push inclined surface abutting against each other. Finally, when the screw rod 41 is screwed inward, the push block 42 moves the push block 43 closer to the telescopic rod, thereby controlling the adjusting block 24 to move closer to the telescopic rod to further compress the preload spring 23 and increase the preload. Conversely, it releases the elastic force of the preload spring 23 and reduces the preload.

[0031] Reference Figure 4 The outer end sidewall of the twisting rod 41 is provided with multiple marking lines, which correspond to the preload required by the preload spring 23 in the weft insertion stage of different papermaking webs during the weaving process. The preload can be calibrated through multiple experiments so that workers can quickly adjust the preload of the preload spring 23 to adapt to the current papermaking web weaving.

[0032] Reference Figure 4The side wall of the telescopic rod of the first connecting rod 21 has a mounting groove 33 for mounting the locking block 31. The bottom of the mounting groove 33 has a guide groove 34 radially formed. Correspondingly, a guide rod 35 is provided at the end of the locking block 31 facing the bottom of the mounting groove 33. The guide rod 35 extends into the guide groove 34, and the locking block 31 achieves guided movement through the cooperation of the guide rod 35 and the guide groove 34. Furthermore, a locking spring 36 is provided in the mounting groove 33. The locking spring 36 is sleeved on the guide rod 35. The two ends of the locking spring 36 are respectively connected to the bottom of the mounting groove 33 and the end of the locking block 31 facing the bottom of the mounting groove 33. The locking block 31 is locked into the locking groove 32 of the second connecting rod 22 by the elastic force of the locking spring 36, and is retracted into the mounting groove 33 by compressing the locking spring 36.

[0033] Multiple lubrication nozzles are installed inside the housing 1, and these nozzles are connected to a lubrication system. The lubrication nozzles are used to lubricate multiple structures within the housing 1. Insufficient lubrication of the structures within the housing 1 can easily lead to structural jamming and increase the structural stress of the conjugate cam weft insertion mechanism, resulting in overload. To quickly eliminate such abnormalities, this invention proposes the following improvements based on the aforementioned unidirectional pull-back assembly. Specifically, a miniature distance sensor 37 is installed at the bottom of the mounting groove 33. The distance sensor 37 is connected to the lubrication nozzle. When the distance sensor 37 detects that the distance between the locking block 31 and the bottom of the mounting groove 33 is less than a threshold, it controls the lubrication nozzle to spray oil once, thereby replenishing lubricating oil when the connecting rod 14 contracts due to overload, eliminating the problem of excessive structural stress caused by insufficient lubrication. Furthermore, if the distance sensor 37 triggers the lubrication nozzle to spray oil multiple times consecutively within a unit time, and if the number of oil sprays triggered exceeds 3 within 10 seconds, the weaving equipment is stopped for inspection to investigate the cause of the continuous overload.

[0034] The implementation principle of a high-precision papermaking wire mesh weaving device in this embodiment is as follows: When the conjugate cam weft insertion mechanism is not overloaded, the preload of the preload spring 23 is greater than or equal to the weft insertion force. At this time, the first link 21 of the rapier connecting rod 14 will push the second link 22 through the near-rigid preload spring 23 and pull the second link 22 through the one-way pull-back assembly, thereby ultimately controlling the rapier 18 to move back and forth and continuously insert weft. When the conjugate cam weft insertion mechanism is overloaded, the weft insertion force will be greater than the preload of the preload spring 23, causing the preload spring 23 to be further compressed, causing the rapier connecting rod 14 to contract. This solves the problem that once the movement of the rapier 18 is obstructed, the contact stress between the cam and the follower increases sharply. At best, the weft insertion driving torque exceeds the limit and causes the loom to stop. At worst, it causes cam profile abrasion, needle roller bearing breakage, or even bending and deformation of the rapier 18, which seriously affects the continuous weaving efficiency of the papermaking wire mesh and the life of the equipment.

[0035] Example 2 This embodiment also discloses a weaving device for high-precision papermaking wire processing.

[0036] Reference Figure 5 The difference from Embodiment 1 is that the control component is an electric control component, specifically an electric cylinder 5. The telescopic end of the electric cylinder 5 is connected to the adjusting block 24 in the longitudinal direction. Similarly, the electric cylinder 5 adjusts the position of the adjusting block 24 according to the data obtained from multiple experimental calibrations of different papermaking webs, corresponding to the pre-pressure required by the pre-pressing spring 23 in the weft insertion stage of different papermaking webs.

[0037] Reference Figure 5 In this embodiment, a temperature sensor is also installed inside the housing 1. The temperature sensor is connected to the control component. As the temperature inside the housing 1 rises, the control component controls the adjusting block 24 to move in the direction of releasing the pre-pressure. The purpose is that as the conjugate cam weft insertion mechanism continues to work, the temperature inside the housing 1 will rise, causing the transmission sword connecting rod 14 to experience metal thermal expansion. This situation will cause the pre-pressure spring 23 to be further compressed, resulting in an inability to respond to structural stress overload in a timely manner. At this time, releasing part of the pre-pressure through the adjusting block 24 can effectively offset the adverse effects caused by metal thermal expansion, ensuring that the transmission sword connecting rod 14 can still respond quickly under structural stress overload and avoid structural damage.

[0038] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision papermaking wire mesh processing weaving equipment, comprising a conjugate cam weft insertion mechanism, characterized in that: The conjugate cam weft insertion mechanism includes a conjugate cam (11), a driven swing arm (12), a J-shaped link (13), a sword transmission link (14), a sector gear (15), a double gear (16), a sword-guiding wheel (17), and a sword shaft (18) connected sequentially in the power transmission sequence. The sword transmission link (14) includes a first link (21) hinged to the J-shaped link (13) and a second link (22) hinged to the sector gear (15). The first link (21) and the second link (22) are telescopic. A telescopic cavity is formed by connecting the ground and a pre-compression member is provided in the telescopic cavity. The pre-compression member has a pre-pressure along the telescopic direction of the transmission link (14). The pre-pressure is greater than or equal to the weft insertion force of the conjugate cam weft insertion mechanism. The first link (21) pushes the second link (22) through the pre-compression member. A one-way pull-back assembly is connected between the first link (21) and the second link (22). The first link (21) pulls the second link (22) through the one-way pull-back assembly. The first connecting rod (21) is provided with a telescopic rod at one end facing the second connecting rod (22), and the second connecting rod (22) is provided with a telescopic groove at one end facing the first connecting rod (21). The telescopic rod is inserted into the telescopic groove, and the telescopic cavity is formed between the inner end of the telescopic rod and the inner end of the telescopic groove. The one-way pull-back assembly includes a locking block (31) and a locking groove (32). The locking block (31) is radially elastically disposed on the side wall of the telescopic rod. The locking groove (32) is opened on the side wall of the telescopic groove. The locking block (31) is a wedge-shaped block. The locking block (31) is engaged with the locking groove (32) along the extension direction of the transmission sword connecting rod (14). The locking block (31) only restricts the extension of the first connecting rod (21) and the second connecting rod (22), but does not restrict the shortening of the first connecting rod (21) and the second connecting rod (22).

2. The weaving equipment for high-precision papermaking wire mesh processing according to claim 1, characterized in that: The pre-compression component is a pre-compression spring (23), one end of which is connected to the inner end of the telescopic rod, and the other end of which is connected to the inner end of the telescopic groove.

3. The weaving equipment for high-precision papermaking wire mesh processing according to claim 2, characterized in that: An adjusting block (24) is provided at the inner end of the telescopic groove. The preload spring (23) is connected to the inner end of the telescopic groove by connecting the adjusting block (24). The adjusting block (24) is connected to a control component. The control component adjusts the preload of the preload spring (23) by controlling the movement of the adjusting block (24).

4. The weaving equipment for high-precision papermaking wire processing according to claim 1, characterized in that: The conjugate cam weft insertion mechanism includes a housing (1). The conjugate cam (11), driven swing arm (12), J-shaped connecting rod (13), transmission connecting rod (14), sector gear (15), and double gear (16) are all arranged in the housing (1). Multiple lubrication nozzles are arranged in the housing (1). The lubrication nozzles are connected to the lubrication system and are used to lubricate multiple structures in the housing (1). The side wall of the telescopic rod is provided with an installation groove (33) for installing the locking block (31). A distance sensor (37) is arranged at the bottom of the groove in the installation groove (33). The distance sensor (37) is connected to the lubrication nozzle. After the distance sensor (37) detects that the distance between the locking block (31) and the bottom of the groove in the installation groove (33) is less than a threshold, it controls the lubrication nozzle to spray oil once.

5. The weaving equipment for high-precision papermaking wire processing according to claim 4, characterized in that: If the distance sensor (37) triggers the lubrication nozzle to spray oil multiple times in a unit time, the weaving equipment will be stopped for inspection.

6. The weaving equipment for high-precision papermaking wire mesh processing according to claim 3, characterized in that: The control component is a manual control component, which includes a screw rod (41), a push block (42), and a push block (43). The screw rod (41) is connected to the second connecting rod (22) along a transverse thread. The screw rod (41) includes an outer end extending out of the second connecting rod (22) and an inner end extending into the second connecting rod (22). The push block (42) is rotatably connected to the inner end of the screw rod (41) and is laterally slidably disposed in the second connecting rod (22). The push block (42) has a push inclined surface. The push block (43) is connected to the adjusting block (24) and is longitudinally slidably disposed in the second connecting rod (22). The push block (43) has a push inclined surface, and the push inclined surface abuts against the push inclined surface.

7. The weaving equipment for high-precision papermaking wire processing according to claim 3, characterized in that: The control component is an electric control component, which is an electric cylinder (5) connected to the adjusting block (24).

8. The weaving equipment for high-precision papermaking wire mesh processing according to claim 7, characterized in that: The conjugate cam weft insertion mechanism includes a housing (1), and the conjugate cam (11), driven swing arm (12), J-shaped connecting rod (13), transmission connecting rod (14), sector gear (15), and double gear (16) are all arranged in the housing (1). A temperature sensor is arranged in the housing (1), and the temperature sensor is connected to the control component. The control component controls the adjusting block (24) to move in the direction of releasing pre-pressure as the temperature inside the housing (1) increases.

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