A tunnel concrete curing moisture material laying device

Abstract

This invention discloses a device for laying moisturizing material for tunnel concrete curing, relating to the field of road maintenance technology. It includes a material box with a discharge assembly inside, a pressurizing assembly on one side of the box's inner cavity, and a support plate fixedly connected to the bottom of the box. The support plate has multiple through-hole discharge holes. This invention improves the mixing degree of the moisturizing material. Through the rotation of two threaded rollers and the movement of the connecting window, the moisturizing material can be better mixed with other components, making the material more uniform and preventing settling and separation. The device improves the mixing degree of the moisturizing material within the box through squeezing and tumbling, thereby improving the quality of the paved road surface. It effectively improves the mixing degree of the moisturizing material and has the advantages of convenient material discharge and efficient operation. The synchronous movement of the drive roller and the boss increases the discharge pressure of the moisturizing material and increases the depth of the material, facilitating smooth discharge.

Description

Technical Field

[0001] This invention relates to the field of road maintenance technology, specifically to a device for laying moisture-retaining materials for tunnel concrete curing. Background Technology

[0002] Currently, in the construction of tunnel concrete structures, especially for large-volume concrete and concrete with special functional requirements, it is necessary to lay moisture-retaining and heat-insulating layers and use curing liquid for curing. The quality of curing for large-volume concrete and concrete with special functional requirements directly determines the quality of the project's functionality and structural safety. Since the curing period for large-volume concrete and concrete with special functional requirements needs to be controlled within 14 to 28 days, the curing time is long and continuous day and night operations are required.

[0003] The following problems exist in the existing technology:

[0004] In the prior art, Chinese patent publication number "CN218985195U" discloses a concrete curing device for a beam-box concrete structure, including a spraying mechanism installed on the beam-box. The spraying mechanism includes electric spraying vehicles symmetrically arranged on the upper end of the beam-box, which are connected to each other via spraying pipes. The electric spraying vehicles are electrically connected to the central control room. Moisturizing material is laid on the concrete inside the beam-box, and water is sprayed onto the concrete inside the beam-box using spraying pipes to prevent water evaporation from the concrete and subsequent cracking. The above patent can moisturize the concrete to a certain extent, but in actual operation, the mixing degree of its moisturizing material is insufficient, and the paving of the concrete pavement is not uniform enough, reducing the overall road quality. It is necessary to improve the prior art. Therefore, we propose a moisturizing material laying device for tunnel concrete curing to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a device for laying moisturizing materials for the curing of tunnel concrete, so as to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This invention provides a device for laying moisture-retaining materials for tunnel concrete curing, comprising a material box containing a discharge assembly, a pressurizing assembly on one side of the material box's inner cavity, a support plate fixedly connected to the bottom of the material box, an assembly chamber on one side of the material box, and a movement chamber on the side wall of the material box's inner cavity. The discharge assembly includes two threaded rollers, with connecting rods fixedly connected to both ends of the threaded rollers. One end of the connecting rod, away from the threaded roller, is rotatably connected to the side wall of the material box. The threaded rollers are placed inside the material box, and the two threaded rollers are symmetrically distributed along the axis of the material box. The support plate has multiple discharge holes penetrating through itself, evenly distributed on the middle surface of the support plate, and the discharge holes are located at the bottom of the two threaded rollers.

[0008] Preferably, the material box has inclined surfaces on both sides of the top, and the threaded roller has multiple connecting windows that penetrate its own threaded blades around its perimeter. The multiple connecting windows are evenly distributed around the axis of the threaded roller, and a lever is fixedly connected to the inner wall of the connecting window. A sliding groove is provided on one side of the lever.

[0009] Preferably, the other end of the connecting rod away from the threaded roller extends through the side wall of the material box into the assembly cavity. A worm gear is sleeved on the surface of the end of the connecting rod located in the assembly cavity. The worm gear is fixedly connected to the connecting rod. A first worm and a second worm are provided on the top of the worm gear.

[0010] Preferably, the first worm and the second worm are fixedly connected to a connecting seat at their close ends. The first worm and the second worm are symmetrically distributed along the axis of the connecting seat. The two worm wheels are respectively meshed with the first worm and the second worm. The first worm and the second worm have the same pitch but opposite threads. The end of the second worm away from the first worm is rotatably connected to the inner wall of the material box.

[0011] Preferably, a drive roller is fixedly connected to the end of the first worm gear away from the second worm gear, and a servo motor is fixedly connected to the end of the drive roller away from the first worm gear. A support plate is sleeved on the surface of the servo motor, the support plate is fixedly connected to the servo motor, and the bottom of the support plate is fixedly connected to the bearing plate.

[0012] Preferably, the pressurizing component includes a boss, one end of which is sleeved on the surface of the drive roller and fixedly connected to the drive roller. A fixing cylinder is provided at the bottom of the boss, and hydraulic oil is stored inside the fixing cylinder. The bottom of the fixing cylinder is fixedly connected to the bearing plate, and a trigger seat is stored inside the fixing cylinder.

[0013] Preferably, the trigger seat is slidably connected to the inner wall of the fixed cylinder, the top of the trigger seat is a circular structure, the top of the trigger seat is slidably connected to the end of the protrusion away from the drive roller, and multiple connecting hoses are fixedly connected to the bottom of the fixed cylinder, with the end of the connecting hose away from the fixed cylinder penetrating through the material box and extending into the motion chamber.

[0014] Preferably, an installation cylinder is fixedly connected to one end of the connecting hose inside the motion chamber. The fixed cylinder is connected to multiple installation cylinders through multiple connecting hoses. One end of the installation cylinder is fixedly connected to the inner wall of the motion chamber. The multiple installation cylinders are evenly distributed along the length of the motion chamber.

[0015] Preferably, the mounting cylinder has a built-in motion seat, which is slidably connected to the inner wall of the mounting cylinder. The motion seat is fixedly connected to multiple guide seats, which are evenly distributed around the axis of the motion seat. The inner wall of the mounting cylinder has multiple guide grooves that match the guide seats, and the guide seats are slidably connected to the groove walls of the guide grooves.

[0016] Preferably, a fixing rod is fixedly connected to the end of the motion seat away from the mounting cylinder, and a top rod is fixedly connected to the end of the fixing rod away from the motion seat. The top rod is placed inside the mounting cylinder and slidably connected to the inner wall of the mounting cylinder. A push plate is provided at the end of the top rod away from the mounting cylinder, and the push plate is placed inside the motion chamber and slidably connected to the inner wall of the motion chamber.

[0017] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0018] This invention improves the mixing degree of moisturizing materials. Through the rotation of two threaded rollers and the movement of the connecting window in the device, the moisturizing material can be better mixed with other components, making the material more uniform and preventing sedimentation and separation. The device improves the mixing degree of moisturizing materials in the box through the squeezing and tumbling action, thereby improving the quality of the paved road surface. Driven by a servo motor, it has periodic motion, making the mixing effect more uniform and continuous, effectively improving the mixing degree of moisturizing materials. It also has the advantages of convenient material discharge and efficient operation. Through the synchronous movement of the drive roller and the boss, the discharge pressure of the moisturizing material is increased, which helps to discharge the material smoothly and increases the depth of the moisturizing material, improving the moisturizing effect. The device is equipped with an elastic element to prevent the moisturizing material from being tumbled out of the material box, reducing waste. It has the characteristics of good mixing effect and high paving effect. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the assembly structure of the material box and pressurization component of the present invention;

[0022] Figure 3 This is a schematic diagram of the material discharge assembly structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the assembly structure of the threaded roller and the actuating rod of the present invention;

[0024] Figure 5 This is the invention Figure 4 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This is a schematic diagram of the internal structure of the material box of the present invention;

[0026] Figure 7 This is a schematic diagram of the pressurization component structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the mounting cylinder of the present invention;

[0028] In the picture:

[0029] 1. Material box; 101. Inclined surface; 102. Bearing plate; 103. Discharge hole; 104. Assembly chamber; 105. Motion chamber; 2. Discharge assembly; 201. Threaded roller; 203. Connecting window; 204. Actuating rod; 205. Sliding groove; 206. Connecting rod; 207. Worm gear; 208. First worm; 209. Second worm; 210. Connecting seat; 211. Drive roller; 212. Servo motor; 213. Support plate; 3. Pressurizing assembly; 301. Thrust seat; 302. Fixed cylinder; 303. Trigger seat; 304. Connecting hose; 305. Mounting cylinder; 306. Motion seat; 309. Guide seat; 310. Guide groove; 311. Fixed rod; 312. Top rod; 313. Push plate. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] Please see Figures 1-8This invention provides a device for laying moisturizing material for tunnel concrete curing, including a material box 1, a material discharge component 2 inside the material box 1, a pressure component 3 on one side of the inner cavity of the material box 1, a support plate 102 fixedly connected to the bottom of the material box 1, a plurality of material discharge holes 103 penetrating through the surface of the support plate 102, the plurality of material discharge holes 103 being evenly distributed on the middle surface of the support plate 102, an assembly chamber 104 on one side of the material box 1, a movement chamber 105 on the side wall of the inner cavity of the material box 1, and inclined surfaces 101 on both sides of the top of the material box 1. By utilizing the cooperation of multiple components, the overall quality of the device in laying moisturizing material is improved.

[0032] To improve the mixing degree of the moisturizing material in the box and thus enhance the quality of the paved road surface, and to facilitate material discharge, two threaded rollers 201 are provided in the discharge assembly 2. Connecting rods 206 are fixedly connected to both ends of the threaded rollers 201. One end of the connecting rod 206, away from the threaded roller 201, is rotatably connected to the side wall of the material box 1. The threaded rollers 201 are placed inside the material box 1, and the two threaded rollers 201 are symmetrically distributed along the axis of the material box 1. Multiple connecting windows 203, penetrating the threaded blades, are opened around the threaded rollers 201. These connecting windows 203 are evenly distributed around the axis of the threaded roller 201. A lever 204 is fixedly connected to the inner wall of each connecting window 203. A sliding groove 205 is opened on one side of the lever 204. The other connecting rod 206 is located away from the threaded roller 201. One end of 01 extends through the side wall of the material box 1 into the assembly chamber 104. A worm gear 207 is sleeved on the surface of the connecting rod 206 located inside the assembly chamber 104. The worm gear 207 is fixedly connected to the connecting rod 206. A first worm 208 and a second worm 209 are provided on the top of the worm gear 207. A connecting seat 210 is fixedly connected to the ends of the first worm 208 and the second worm 209 that are close to each other. The first worm 208 and the second worm 209 are symmetrically distributed along the axis of the connecting seat 210. The two worm gears 207 mesh with the first worm 208 and the second worm 209 respectively. The first worm 208 and the second worm 209 have the same pitch but opposite threads. The end of the second worm 209 away from the first worm 208 is rotatably connected to the inner wall of the material box 1. A drive roller 211 is fixedly connected to the end of rod 208 away from the second worm 209. A servo motor 212 is fixedly connected to the end of drive roller 211 away from the first worm 208. A support plate 213 is sleeved on the surface of the servo motor 212. The support plate 213 is fixedly connected to the servo motor 212. The bottom of the support plate 213 is fixedly connected to the bearing plate 102. During the laying process, the servo motor 212 drives the first worm 208 and the second worm 209 at the output end to rotate around their own axis. Because the threads of the first worm 208 and the second worm 209 are opposite, the two worm wheels 207 at the bottom rotate in opposite directions. Consequently, the two threaded rollers 201 in the material box 1 rotate in opposite directions. The threaded rollers 201 have deep thread grooves, and multiple discharge holes 103 are set in both... Between the threaded rollers 201, when both threaded rollers 201 rotate toward the axis of the material box 1, the moisturizing material in the middle of the material box 1 will be squeezed. The set actuating rod 204 further increases the pressure on the moisturizing material, driving the moisturizing material to be discharged from the multiple discharge holes 103 at the bottom of the bearing plate 102. As the drive motor moves to pave the road surface, its servo motor 212 moves periodically. When both threaded rollers 201 rotate away from the axis of the material box 1, the two threaded rollers 201 will tumble and mix the moisturizing material in the material box 1. The material will also move from the multiple connecting windows 203, making the mixing between the moisturizing materials more uniform, preventing sedimentation and separation, and further improving the paving quality.

[0033] To further increase the discharge pressure of the moisturizing material during laying and to prevent the moisturizing material from overflowing from the material box 1 during uniform mixing, a boss 301 is provided in the pressurizing component 3. One end of the boss 301 is sleeved on the surface of the drive roller 211, and the boss 301 is fixedly connected to the drive roller 211. A fixing cylinder 302 is provided at the bottom of the boss 301, and the fixing cylinder 302 contains hydraulic oil. The bottom of the fixing cylinder 302 is fixedly connected to the bearing plate 102. A trigger seat 303 is built into the fixing cylinder 302 and is slidably connected to the inner wall of the fixing cylinder 302. The top of the trigger seat 303 has a circular structure and is slidably connected to the end of the boss 301 away from the drive roller 211. Multiple connecting hoses 304 are fixedly connected to the bottom of the fixing cylinder 302. One end of the connecting hose 304, away from the fixed cylinder 302, passes through the material box 1 and extends into the motion chamber 105. One end of the connecting hose 304 inside the motion chamber 105 is fixedly connected to an installation cylinder 305. The fixed cylinder 302 is connected to multiple installation cylinders 305 via multiple connecting hoses 304. One end of each installation cylinder 305 is fixedly connected to the inner wall of the motion chamber 105. Multiple installation cylinders 305 are evenly distributed along the length of the motion chamber 105. Each installation cylinder 305 contains a motion seat 306, which is slidably connected to the inner wall of the installation cylinder 305. Multiple guide seats 309 are fixedly connected to the motion seat 306, and these guide seats 309 are evenly distributed around the axis of the motion seat 306. Multiple guide grooves 309 that match the guide seats 309 are formed on the inner wall of the installation cylinder 305. 10. The guide seat 309 is slidably connected to the wall of the guide groove 310. A fixed rod 311 is fixedly connected to the end of the moving seat 306 away from the mounting cylinder 305. A push rod 312 is fixedly connected to the end of the fixed rod 311 away from the moving seat 306. The push rod 312 is placed inside the mounting cylinder 305 and is slidably connected to the inner wall of the mounting cylinder 305. A push plate 313 is provided at the end of the push rod 312 away from the mounting cylinder 305. The push plate 313 is placed inside the moving chamber 105 and is slidably connected to the inner wall of the moving chamber 105. When the pressing moisturizing material is laid, its drive roller 211 will also drive the boss 301 to rotate clockwise in sync with itself. Because the boss 301 is a long strip-shaped elliptical contact, the boss 301 will contact the trigger seat 3 at the bottom during the movement. 03. Contact compression drives the trigger seat 303 to move downwards, squeezing the hydraulic oil inside the fixed cylinder 302 into multiple mounting cylinders 305 at the other end. The push rods 312 inside the multiple mounting cylinders 305 are driven by force to move the push plate 313 at the other end within the motion chamber 105, causing the push plate 313 to compress the moisturizing material at the bottom of the material box 1, reducing the bottom space of the material, increasing the overall depth of the moisturizing material, and increasing the bottom pressure. This, combined with the threaded roller 201, facilitates the discharge of the moisturizing material from the discharge hole 103 for laying. An elastic element is provided between the inner wall of the motion chamber 105 and the push plate 313 to assist. When the drive roller 211 moves counterclockwise with the servo motor 212, the threaded roller 201 is tumbling and mixing the moisturizing material.With the protrusion 301 moving away from the trigger seat 303, the push plate 313 returns to the motion chamber 105. This increases the bottom space of the material box 1, reducing the depth of the moisturizing material within the material box 1. This helps prevent the moisturizing material from being tumbled out of the material box 1, thus preventing waste.

[0034] Working principle

[0035] This device plays a crucial role in road paving. It consists of two threaded rollers 201 symmetrically distributed along the axis of the material box 1, each with deep threaded grooves and a connecting window 203 penetrating its own threaded blades. The moisture-retaining material in the material box 1 is compressed, tumbled, and mixed under the action of the two threaded rollers 201. The rotation of the threaded rollers 201 is driven by a servo motor 212, which, through the movement of the first worm 208 and the second worm 209, causes the two worm wheels 207 to rotate in opposite directions, thereby causing the two threaded rollers 201 to rotate in opposite directions. When the two threaded rollers 201 rotate toward the axis of the material box 1, the moisture-retaining material is compressed and discharged from the discharge hole 103; when the two threaded rollers 201 rotate toward the axis of the material box 1, the moisture-retaining material is compressed and discharged from the discharge hole 103. When the device rotates away from the axis of the material box 1, the moisturizing material is tumbled and mixed, and moves through the connecting window 203, which can improve the mixing degree of the moisturizing material in the box, making the material more uniform and preventing it from settling and separating. Through the action of squeezing and tumbling, the moisturizing material can be better mixed with other components, improving the quality of the paved road surface. The setting and movement mode of the threaded roller 201 makes material feeding more convenient and improves work efficiency. The device is driven by a servo motor 212, which has periodic movement, making the mixing effect more uniform and continuous, effectively improving the mixing degree of the moisturizing material, thereby improving the quality of the paved road surface, while also having the advantages of convenient material feeding and efficient operation.

[0036] When laying the moisturizing material, the drive roller 211 rotates clockwise, causing the boss 301 to move synchronously with itself. The boss 301 is an elongated ellipse that contacts and presses against the trigger seat 303 at the bottom. The boss 301 applies pressure to the trigger seat 303, causing it to move downward and squeezing the hydraulic oil in the fixed cylinder 302 into multiple mounting cylinders 305. The push rods 312 in the multiple mounting cylinders 305 are driven by the force to move the push plate 313 at the other end within the motion chamber 105, squeezing the moisturizing material at the bottom of the material box 1. Through the squeezing action of the push plate 313, the bottom space of the material is reduced, increasing the overall depth of the moisturizing material and increasing the bottom pressure, which is beneficial for material discharge and laying. An elastic element is provided between the inner wall of the motion chamber 105 and the push plate 313 to assist the drive roller. When 211 moves counterclockwise, it helps the push plate 313 rebound, thereby increasing the bottom space of the inner cavity of the material box 1 and reducing the depth of the moisturizing material. Through the synchronous movement of the drive roller 211 and the boss 301, the discharge pressure of the moisturizing material is increased, which helps to smoothly discharge the material from the discharge hole 103 and facilitates laying. Through the squeezing action of the push plate 313, the pressure at the bottom is increased, which is conducive to increasing the depth of the moisturizing material, thereby improving the moisturizing effect. The elastic element is set to prevent the moisturizing material from being tumbled out of the material box 1, reducing waste. Through the movement of the boss 301 and the push plate 313, the pressure and depth of the moisturizing material are increased, improving the discharge effect and the moisturizing effect. The elastic element prevents the material from overflowing, which can fully cooperate with the drive roller 211 to carry out the laying work and improve the laying effect at the same time.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for laying moisture-retaining materials for the curing of tunnel concrete, characterized in that, The system includes a material box (1), which has a built-in discharge assembly (2). A pressurizing assembly (3) is provided on one side of the inner cavity of the material box (1). A bearing plate (102) is fixedly connected to the bottom of the material box (1). An assembly chamber (104) is provided on one side of the material box (1). A motion chamber (105) is opened on the side wall of the inner cavity of the material box (1). The discharge assembly (2) includes two threaded rollers (201). A connecting rod (206) is fixedly connected to both ends of the threaded rollers (201). One end of the connecting rod (206) away from the threaded roller (201) is rotatably connected to the side wall of the material box (1). The threaded rollers (201) are placed inside the material box (1). The two threaded rollers (201) move along the material box. The material box (1) is symmetrically distributed along its axis. Multiple discharge holes (103) are provided on the surface of the bearing plate (102), which are evenly distributed on the middle surface of the bearing plate (102). The discharge holes (103) are located at the bottom of two threaded rollers (201). The other end of the connecting rod (206) away from the threaded rollers (201) extends through the side wall of the material box (1) into the assembly chamber (104). A worm gear (207) is sleeved on the surface of the connecting rod (206) located in the assembly chamber (104). The worm gear (207) is fixedly connected to the connecting rod (206). A first worm (208) and a second worm (209) are provided on the top of the worm gear (207). A connecting seat (210) is fixedly connected to one end of the first worm (208) and the second worm (209) that are close to each other. The first worm (208) and the second worm (209) are symmetrically distributed along the axis of the connecting seat (210). Two worm wheels (207) are respectively meshed with the first worm (208) and the second worm (209). The first worm (208) and the second worm (209) have the same pitch but opposite threads. The end of the second worm (209) away from the first worm (208) is rotatably connected to the inner wall of the material box (1). A drive roller (211) is fixedly connected to the end of the first worm (208) away from the second worm (209). The end of the drive roller (211) away from the first worm (208) is fixedly connected to the first worm (208). A servo motor (212) is fixedly connected to the servo motor (212), and a support plate (213) is sleeved on the surface of the servo motor (212). The support plate (213) is fixedly connected to the servo motor (212), and the bottom of the support plate (213) is fixedly connected to the bearing plate (102). The pressurizing component (3) includes a boss (301), one end of which is sleeved on the surface of the drive roller (211). The boss (301) is fixedly connected to the drive roller (211). A fixed cylinder (302) is provided at the bottom of the boss (301). The fixed cylinder (302) contains hydraulic oil. The bottom of the fixed cylinder (302) is fixedly connected to the bearing plate (102). A trigger seat (303) is built into the fixed cylinder (302).The trigger seat (303) is slidably connected to the inner wall of the fixed cylinder (302). The top of the trigger seat (303) is circular. The top of the trigger seat (303) is slidably connected to the end of the protrusion (301) away from the drive roller (211). Multiple connecting hoses (304) are fixedly connected to the bottom of the fixed cylinder (302). The end of the connecting hose (304) away from the fixed cylinder (302) passes through the material box (1) and extends into the motion chamber (105). A mounting sleeve (305) is fixedly connected to one end of a flexible tube (304) inside the motion chamber (105). The fixed sleeve (302) is connected to multiple mounting sleeves (305) through multiple connecting flexible tubes (304). One end of the mounting sleeve (305) is fixedly connected to the inner wall of the motion chamber (105). Multiple mounting sleeves (305) are evenly distributed along the length of the motion chamber (105). A motion seat (306) is built into each mounting sleeve (305). 06) The motion seat (306) is slidably connected to the inner wall of the mounting cylinder (305). Multiple guide seats (309) are fixedly connected around the motion seat (306). These guide seats (309) are evenly distributed around the axis of the motion seat (306). Multiple guide grooves (310) matching the guide seats (309) are opened on the inner wall of the mounting cylinder (305). The guide seats (309) are slidably connected to the groove walls of the guide grooves (310). The motion seat (306) is located away from the mounting cylinder (305). A fixing rod (311) is fixedly connected to one end of the fixing rod (311). A push rod (312) is fixedly connected to the end of the fixing rod (311) away from the motion seat (306). The push rod (312) is placed inside the mounting cylinder (305) and slidably connected to the inner wall of the mounting cylinder (305). A push plate (313) is provided at the end of the push rod (312) away from the mounting cylinder (305). The push plate (313) is placed inside the motion chamber (105) and slidably connected to the inner wall of the motion chamber (105).

2. The device for laying moisturizing material for tunnel concrete curing according to claim 1, characterized in that, The material box (1) has inclined surfaces (101) on both sides of the top. The threaded roller (201) has multiple connecting windows (203) that pass through its own thread blades around its perimeter. The multiple connecting windows (203) are evenly distributed around the axis of the threaded roller (201). A toggle rod (204) is fixedly connected to the inner wall of the connecting window (203). A sliding groove (205) is provided on one side of the toggle rod (204).

Images