Granulator for feed production

Abstract

The utility model relates to a granulator for feed production. Comprising a main rack, a screw shell is fixedly connected to the main rack, an end discharging barrel and an extrusion pore plate are connected to the outer end of the screw shell, and the extrusion device further comprises an extrusion screw rotationally connected in the screw shell; the cutting device is mounted on the main rack and comprises a driving seat mechanism and a cutting motor which are mounted on the main rack; a discharging cover shell structure which is provided with a discharging opening in the bottom and is communicated with the fan is mounted on the driving seat mechanism, and a through notch is formed in the discharging cover shell structure; a cutting mechanism is rotationally connected in the discharging housing structure; the feeding barrel and the stirring bin are communicated and connected at the feeding hole of the screw shell; an anti-blocking mechanism for stirring materials is mounted in the feeding cylinder, and a mixing mechanism for stirring the materials is mounted in the stirring bin; a feed valve assembly is mounted at a discharge port of the stirring bin; and the rotary driving device is used for driving the extrusion screw rod, the anti-blocking mechanism and the mixing mechanism to operate synchronously. According to the utility model, raw materials fed into the granulator can be uniformly mixed, continuous and uniform feeding is ensured, the size of discharged granules can be adjusted, and feed granules are prevented from splashing and are easy to collect.

Description

Technical Field

[0001] The utility model belongs to the technical field of granulation equipment, in particular to a granulator for feed production. Background Art

[0002] Feed is a general term for food for raised animals. In a narrower sense, feed mainly refers to food for animals raised in agriculture or animal husbandry. Feed includes more than ten varieties of feed raw materials such as soybeans, soybean meal, corn, fish meal, amino acids, miscellaneous meal, whey powder, oils, meat and bone meal, grains, and feed additives.

[0003] At present, more and more livestock are being raised. With the progress of society, the artificial breeding industry has developed greatly, and the demand for breeding is increasing. The process of feed production includes raw material cleaning, crushing or grinding, mixing, granulation, drying and packaging. Feed granulation equipment is an indispensable processing machinery in the granulation process of feed production. It can press the crushed materials of raw materials such as corn, soybean meal, straw, grass, rice husk into granular feed through extrusion and other operations, which is convenient for livestock to eat and absorb. Traditional feed granulators mainly use screw extrusion granulation, and a cutting blade is installed at the outer end of the screw to cut the extruded material to obtain granular feed.

[0004] However, in the actual working process, it is found that the above-mentioned traditional feed pelletizer has certain defects: first, the blade for cutting is directly installed on the outer end of the screw, and the cutting operation is performed while the screw rotates. Since the cutting blade is synchronized with the rotation speed of the screw, only one particle size of particles can be obtained, and the length of the discharged particles cannot be adjusted according to the actual production needs. In addition, when the feed is cut by the rotating blade, it is easy to cause the cut feed particles to splash around and cannot fall completely into the collection box; in addition, the existing pelletizer cannot evenly mix the raw materials and perform subsequent stable feeding processing, which can easily lead to uneven mixing of the raw materials, blockage, etc. Therefore, it is urgent to design a pelletizer for feed production to solve the above problems. Utility Model Content

[0005] The utility model provides a feed production granulator with a reasonable structural design to solve the technical problems existing in the known technology. The utility model can evenly mix the raw materials put into the granulator, ensure continuous and uniform feeding, and can adjust the size of the pellets to avoid splashing of feed particles and make them easy to collect.

[0006] The utility model adopts the following technical scheme to solve the technical problems existing in the known technology: a granulator for feed production comprises a main frame, a screw housing arranged transversely is fixedly connected to the main frame, a terminal discharge barrel in a constricted shape is detachably connected to the open end of the screw housing, an extrusion orifice plate is installed at the open end of the terminal discharge barrel, and also comprises an extrusion screw inserted in the screw housing and rotatably connected to the screw housing; also comprises a cutting device installed on the main frame and located at the front end of the extrusion orifice plate, the cutting device comprises a drive seat mechanism detachably installed on the main frame, a cutting motor is installed on the drive seat mechanism; a discharge port is opened at the bottom and passes through the drive seat mechanism A discharge hood structure in which a gas pipeline is connected to the fan, and a through slot for the extrusion orifice plate to pass through is provided on the front end surface of the discharge hood structure; a cutting mechanism connected to a cutting motor is rotatably connected in the discharge hood structure; it also includes a feed barrel and a mixing bin connected at the feed port of the screw housing, and the feed barrel and the mixing bin are butt-connected; an anti-blocking mechanism for stirring materials is installed in the feed barrel, and a mixing mechanism for stirring materials is installed in the mixing bin; a feed valve assembly for controlling the opening and closing state of the mixing bin is installed at the discharge port of the mixing bin; it also includes a rotary drive device installed on the main frame for driving the extrusion screw, the anti-blocking mechanism and the mixing mechanism to operate synchronously.

[0007] The advantages and positive effects of the utility model are as follows: the utility model provides a granulator for feed production, which can fully stir the raw materials before granulation by setting a mixing mechanism, so as to avoid uneven mixing of the raw materials and affect the quality of the feed; by setting a feed valve assembly, the falling speed and falling amount of the feed raw materials can be controlled, so as to ensure continuous and uniform feeding and avoid blockage; by setting an anti-blocking mechanism, the raw materials at the feed port of the screw housing can be stirred and disturbed, so as to avoid blockage of the material at the feed port and cause idling of the extrusion screw; by setting a cutting device composed of a drive seat mechanism, a cutting motor, a discharge cover shell structure and a cutting mechanism, it is convenient to cut the feed, and the length of the feed particles can be adjusted by controlling the cutting speed, so as to facilitate cutting of feeds of different lengths, thereby improving the practicality of the granulator.

[0008] Preferably: the discharge cover shell structure includes a rotating base connected to the driving seat mechanism through a connecting rod, a bearing sleeve is integrally formed in the middle of the rotating base, and the cutting mechanism is rotatably connected to the bearing sleeve through a rolling bearing; it also includes a cover installed on the rotating base, which is arranged outside the cutting mechanism and has a discharge port at the lower end. A dust suction port is connected to the outer peripheral wall of the splash guard, and the dust suction port is connected to the fan through a gas pipeline. A through slot is opened on the front end surface of the splash guard.

[0009] Preferably: the cutting mechanism includes a cutting shaft connected to the output shaft of the cutting motor; a cutting knife sleeve is detachably connected to the outer end of the cutting shaft, and a plurality of sets of knife mounting rods extending radially along the cutting shaft are detachably mounted on the outer peripheral wall of the cutting knife sleeve, and a cutting blade with adjustable position is mounted on each knife mounting rod.

[0010] Preferably, the feed valve assembly includes two sets of symmetrically arranged control plug plates inserted into slots provided on the mixing bin, and also includes two sets of control cylinders installed on the mixing bin and used to drive the two control plug plates to move toward or away from each other.

[0011] Preferably: the anti-blocking mechanism includes two groups of lower stirring shafts that are rotatably connected to the feed barrel through rolling bearings and are arranged in parallel laterally, and the first rotating drum and the second rotating drum are respectively sleeved on the two groups of lower stirring shafts, and a plurality of groups of first stirring blades distributed along its axial direction are installed on the first rotating drum, and a plurality of groups of second stirring blades distributed along its axial direction are installed on the second rotating drum.

[0012] Preferably: the mixing mechanism comprises two groups of upper stirring shafts which are rotatably connected to the stirring bin via rolling bearings and are arranged in parallel transversely, each upper stirring shaft is provided with a mixing sleeve, and a plurality of bent mixing stirring rods are provided on the mixing sleeve.

[0013] Preferably: the rotary drive device includes a main drive motor installed on the main frame, and the main drive motor is connected to the extrusion screw; an upper transmission mechanism is installed between the main drive motor and the mixing mechanism to drive the mixing mechanism to operate; a lower transmission mechanism is installed between the extrusion screw and the anti-blocking mechanism to drive the two to operate synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the main part of the utility model;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the mixing mechanism in the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the anti-blocking mechanism in the utility model;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the cutting device in the utility model;

[0019] In the figure: 1. main frame; 2. cutting device; 2-1. mounting rod; 2-2. rod sleeve; 2-3. motor mounting seat; 2-4. cutting motor; 2-5. rotating base; 2-6. dust suction port; 2-7. splash shield; 2-8. cutter sleeve; 2-9. knife mounting rod; 2-10. cutting blade; 2-11. through slot; 2-12. cutting shaft; 3. extrusion orifice plate; 4. end discharge barrel; 5. extrusion screw; 6. screw housing; 7. anti-blocking mechanism; 7-1. first drum; 7-2. first stirring blade; 7-3. lower stirring shaft; 7-4, second stirring blade; 7-5, second rotating drum; 8, feeding drum; 9, feeding valve assembly; 9-1, control plug plate; 9-2, control cylinder; 10, mixing mechanism; 10-1, mixing rotating sleeve; 10-2, mixing stirring rod; 10-3, upper stirring shaft; 11, stirring bin; 12, lower transmission mechanism; 12-1, transition gear; 12-2, lower driven gear; 12-3, driving gear; 13, upper transmission mechanism; 13-1, transmission pulley pair; 13-2, upper driven gear; 13-3, upper transmission shaft; 14, main driving motor. DETAILED DESCRIPTION

[0020] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0021] See also Figure 1 The utility model feed production pelletizer includes a main frame 1, a transversely arranged screw housing 6 is fixedly connected to the main frame 1, a constricted end discharge barrel 4 is detachably connected to the outer open end of the screw housing 6, an extrusion orifice plate 3 is installed at the open end of the end discharge barrel 4, a plurality of through holes are opened on the extrusion orifice plate 3, and an extrusion screw 5 is inserted in the screw housing 6 and rotatably connected to the screw housing 6; and a cutting device 2 is also installed on the main frame 1 and located at the front end of the extrusion orifice plate 3.

[0022] See also Figure 5 The above-mentioned cutting device 2 includes a driving seat mechanism detachably mounted on the main frame 1, on which a cutting motor 2-4 is mounted; a discharge cover shell structure with a discharge port at the bottom and connected to the fan through a gas pipeline is mounted on the driving seat mechanism, and a through slot 2-11 for the extrusion orifice plate 3 to pass through is provided on the front end surface of the discharge cover shell structure; a cutting mechanism connected to the cutting motor 2-4 is rotatably connected in the discharge cover shell structure.

[0023] The driving seat mechanism includes a motor mounting seat 2-3 for mounting a cutting motor 2-4, and a discharge cover structure is connected to the motor mounting seat 2-3 through a rod; and also includes a support rod sleeve 2-2 fixed to the lower end of the motor mounting seat 2-3, and a mounting support rod 2-1 connected to the main frame 1 is inserted in the support rod sleeve 2-2. The mounting support rod 2-1 adopts a stepped shaft. In the actual working process, a round nut and a stop washer are installed at the outer end of the mounting support rod 2-1, and a locking nut is installed at the inner end of the mounting support rod 2-1.

[0024] Among them, the above-mentioned discharge cover shell structure includes a rotating base 2-5 connected to the driving seat mechanism through a connecting rod, a bearing sleeve is integrally formed in the middle of the rotating base 2-5, and the cutting mechanism is rotatably connected to the bearing sleeve through a rolling bearing; it also includes a splash shield 2-7 installed on the rotating base 2-5, which is arranged outside the cutting mechanism and has a discharge port at the lower end, and a dust suction port 2-6 is connected to the outer peripheral wall of the splash shield 2-7, and the dust suction port 2-6 is connected to the fan through a gas pipeline, and a through slot 2-11 is opened on the front end surface of the splash shield 2-7.

[0025] Among them, the above-mentioned cutting mechanism includes a cutting shaft 2-12 connected to the output shaft of the cutting motor 2-4; a cutting knife sleeve 2-8 is detachably connected to the outer end of the cutting shaft 2-12, and a plurality of groups of knife mounting rods 2-9 extending radially along the cutting shaft 2-12 are detachably installed on the outer peripheral wall of the cutting knife sleeve 2-8, and a cutting blade 2-10 with adjustable position is installed on each knife mounting rod 2-9. In addition, the above-mentioned cutting shaft 2-12 is rotatably connected to the bearing sleeve integrally formed in the middle part of the above-mentioned rotating base 2-5 through a rolling bearing; seals and end covers are installed at the front and rear ends of the above-mentioned bearing sleeve; an open groove extending along its axial direction is opened in the middle part of each knife mounting rod 2-9, and each cutting blade 2-10 is respectively inserted into the open groove opened on the corresponding knife mounting rod 2-9, and a strip hole is opened on each cutting blade 2-10, and the knife mounting rod 2-9 and the cutting blade 2-10 are locked and connected by screws and locking nuts inserted in the above-mentioned strip holes.

[0026] like Figure 1 As shown, this embodiment also includes a feed barrel 8 and a stirring chamber 11 which are connected at the feed port of the screw housing 6, and the feed barrel 8 and the stirring chamber 11 are butt-connected; an anti-blocking mechanism 7 for stirring materials is installed in the feed barrel 8, and a mixing mechanism 10 for stirring materials is installed in the stirring chamber 11; and also includes a rotating drive device installed on the main frame 1 for driving the extrusion screw 5, the anti-blocking mechanism 7 and the mixing mechanism 10 to operate synchronously.

[0027] like Figure 3As shown, the above-mentioned mixing mechanism 10 includes two groups of upper mixing shafts 10-3 which are rotatably connected to the mixing chamber 11 through rolling bearings and are arranged in parallel laterally. A mixing rotating sleeve 10-1 is installed on each upper mixing shaft 10-3, and a plurality of bent mixing stirring rods 10-2 are installed on the mixing rotating sleeve 10-1.

[0028] like Figure 4 As shown, the above-mentioned anti-blocking mechanism 7 includes two groups of lower stirring shafts 7-3 which are rotatably connected to the feed cylinder 8 through rolling bearings and are arranged in parallel laterally, and the first rotating cylinder 7-1 and the second rotating cylinder 7-5 are respectively sleeved on the two groups of lower stirring shafts 7-3, and a plurality of groups of first stirring blades 7-2 distributed along its axial direction are installed on the first rotating cylinder 7-1, and a plurality of groups of second stirring blades 7-4 distributed along its axial direction are installed on the second rotating cylinder 7-5.

[0029] The first rotating drum 7-1 and the second rotating drum 7-5 are fixedly connected to the corresponding lower stirring shaft 7-3 by screws and locking nuts. In this embodiment, the multiple groups of first stirring blades 7-2 and the multiple groups of second stirring blades 7-4 are evenly spaced. In addition, in order to avoid mutual interference during rotation, during the rotation of the lower stirring shaft 7-3, each of the first stirring blades 7-2 can pass between two adjacent groups of second stirring blades 7-4, and similarly, each of the second stirring blades 7-4 can pass between two adjacent groups of first stirring blades 7-2.

[0030] See also Figure 2 The above-mentioned rotation drive device includes a main drive motor 14 installed on the main frame 1, the main drive motor 14 adopts a double-axis reduction motor, and the main drive motor 14 is connected to the extrusion screw 5; an upper transmission mechanism 13 is installed between the main drive motor 14 and the mixing mechanism 10, which is used to drive the mixing mechanism 10 to operate; a lower transmission mechanism 12 is installed between the extrusion screw 5 and the anti-blocking mechanism 7 to drive the two to operate synchronously.

[0031] In addition, the upper transmission mechanism 13 includes an upper driven gear 13-2 keyed to each upper stirring shaft 10-3, two groups of upper driven gears 13-2 are meshed with each other, and also includes an upper transmission shaft 13-3 coaxially connected to one group of upper stirring shafts 10-3, and also includes a transmission pulley pair 13-1 installed between the upper transmission shaft 13-3 and an output shaft of the total drive motor 14. The above-mentioned transmission pulley pair 13-1 includes a driving pulley keyed to the output shaft of the total drive motor 14, and also includes a driven pulley keyed to the upper transmission shaft 13-3, and a belt in a closed state is connected for transmission between the driving pulley and the driven pulley.

[0032] The lower transmission mechanism 12 includes lower driven gears 12-2 key-connected to the ends of each lower stirring shaft 7-3, and two groups of lower driven gears 12-2 are meshed with each other. A driving gear 12-3 meshed with one group of lower driven gears 12-2 is key-connected to the outer end of the extrusion screw 5, and a transition gear 12-1 meshed with another group of lower driven gears 12-2 is installed on the feed barrel 8, and the transition gear 12-1 and the driving gear 12-3 are meshed with each other.

[0033] See also Figure 1 In order to control the feeding speed and amount of the raw materials, a feed valve assembly 9 for controlling the opening and closing state of the mixing bin 11 is installed at the discharge port of the mixing bin 11.

[0034] like Figure 2 As shown, the above-mentioned feed valve assembly 9 includes two groups of symmetrically arranged control plug plates 9-1 inserted into the grooves opened on the mixing chamber 11, and also includes two groups of control cylinders 9-2 installed on the mixing chamber 11 and used to drive the two control plug plates 9-1 to move toward or away from each other.

[0035] In this embodiment, the cylinder barrels of the two control cylinders 9-2 are respectively mounted on two oppositely disposed side walls of the mixing bin 11, and the extended ends of the two control cylinders 9-2 are respectively mounted on corresponding control plug boards 9-1, and the control plug boards 9-1 are L-shaped. In the actual working process, by controlling the extension and retraction degree of the piston rod of the control cylinder 9-2, the size of the gap between the two control plug boards 9-1 can be controlled, and then the opening degree of the discharge port of the mixing bin 11 can be controlled, and then the falling speed and falling amount of the raw materials can be controlled, so as to ensure continuous and uniform feeding and avoid blockage that affects the normal operation of the granulator.

[0036] Working process:

[0037] Start the main drive motor 14 and the cutting motor 2-4, pour the raw materials into the mixing bin 11, and the mixing mechanism 10 running in the mixing bin 11 can efficiently mix the raw materials, and then fully mix the raw materials. In this process, the feed valve assembly 9 is in a closed state. After the raw materials are mixed for a preset time, the two groups of control cylinders 9-2 in the feed valve assembly 9 are started, and the control plug plate 9-1 is pulled out a suitable distance as needed to control the opening degree of the discharge port of the mixing bin 11, thereby achieving the control of the falling speed and falling amount of the raw materials, so that the raw materials fall into the feed barrel 8, ensuring continuous and uniform feeding, and avoiding blockage and affecting the normal operation of the granulator; the materials falling into the feed barrel 8 can be stirred by the anti-blocking mechanism 7, which can avoid the blockage of the materials at the feed port of the screw housing 6, avoid the idling of the extrusion screw 5, and ensure the stable feeding processing of the granulator;

[0038] Under the transmission action of the rotating extrusion screw 5, the material entering the screw housing 6 is transmitted forward to the end discharge barrel 4, and the material in the end discharge barrel 4 is extruded through a plurality of through holes opened on the extrusion orifice plate 3 under the action of the rotating extrusion screw 5;

[0039] During the material extrusion process, the started cutting motor 2-4 can drive the cutting shaft 2-12 in the cutting mechanism to rotate, and then drive the multiple groups of cutting blades 2-10 in the cutting mechanism to cut the extruded material, thereby obtaining feed particles; the length of the feed particles can be adjusted by controlling the rotation speed of the cutting shaft 2-12, which is convenient for cutting feeds of different lengths, thereby improving the practicality of the granulation device; during the cutting operation, the fan connected to the dust suction port 2-6 can absorb and collect the dust generated during the cutting process, so as to avoid the dust generated during the cutting process from polluting the workshop environment; in addition, the discharge cover shell structure composed of the rotating base 2-5 and the splash shield 2-7 can avoid the splashing of feed particles cut during the cutting process, and facilitate the collection of finished feed products.

Claims

1. A pelletizing machine for feed production, characterized in that: The invention comprises a main frame (1), a screw housing (6) arranged transversely is fixedly connected to the main frame (1), a terminal discharge barrel (4) in a constricted shape is detachably connected to the open end of the screw housing (6), an extrusion orifice plate (3) is installed at the open end of the terminal discharge barrel (4), and an extrusion screw (5) is inserted into the screw housing (6) and rotatably connected to the screw housing (6); a cutting device (2) is installed on the main frame (1) and is located at the front end of the extrusion orifice plate (3); the cutting device (2) comprises a drive seat mechanism detachably installed on the main frame (1), and a cutting motor (2-4) is installed on the drive seat mechanism; a discharge cover structure is installed on the drive seat mechanism, the bottom of which is provided with a discharge port and is connected to a fan through a gas pipeline, and a discharge cover structure is installed on the front end surface of the discharge cover structure. A through slot (2-11) is provided on the top for the extrusion orifice plate (3) to pass through; a cutting mechanism connected to a cutting motor (2-4) is rotatably connected in the discharge housing structure; the device also includes a feed barrel (8) and a stirring chamber (11) which are connected at the feed inlet of the screw housing (6), and the feed barrel (8) and the stirring chamber (11) are butt-jointedly installed; an anti-blocking mechanism (7) for stirring materials is installed in the feed barrel (8), and a mixing mechanism (10) for stirring materials is installed in the stirring chamber (11); a feed valve assembly (9) for controlling the opening and closing state of the stirring chamber (11) is installed at the discharge port of the stirring chamber (11); and a rotary drive device is also included which is installed on the main frame (1) and is used to drive the extrusion screw (5), the anti-blocking mechanism (7) and the mixing mechanism (10) to operate synchronously.

2. The pelletizing machine for feed production as claimed in claim 1, characterized in that: The discharge cover shell structure comprises a rotating base (2-5) connected to a driving seat mechanism via a connecting rod, a bearing sleeve integrally formed in the middle of the rotating base (2-5), and a cutting mechanism rotatably connected to the bearing sleeve via a rolling bearing; and also comprises a splash shield (2-7) installed on the rotating base (2-5), arranged outside the cutting mechanism and having a discharge port at the lower end, a dust suction port (2-6) connected to the outer peripheral wall of the splash shield (2-7), the dust suction port (2-6) connected to a fan via a gas pipeline, and a through slot (2-11) opened on the front end surface of the splash shield (2-7).

3. The pelletizing machine for feed production as claimed in claim 1, characterized in that: The material cutting mechanism comprises a cutting shaft (2-12) connected to an output shaft of a cutting motor (2-4); a cutting knife sleeve (2-8) is detachably connected to the outer end of the cutting shaft (2-12); a plurality of knife mounting rods (2-9) extending radially of the cutting shaft (2-12) are detachably mounted on the outer peripheral wall of the cutting knife sleeve (2-8); and a cutting blade (2-10) whose position can be adjusted is mounted on each knife mounting rod (2-9).

4. The pelletizing machine for feed production according to claim 1, characterized in that: The feed valve assembly (9) comprises two groups of symmetrically arranged control plug plates (9-1) inserted into slots opened on the mixing bin (11), and also comprises two groups of control cylinders (9-2) installed on the mixing bin (11) and respectively used to drive the two control plug plates (9-1) to move towards or away from each other.

5. The pelletizing machine for feed production according to claim 1, characterized in that: The anti-blocking mechanism (7) comprises two groups of lower stirring shafts (7-3) which are rotatably connected to the feed cylinder (8) via rolling bearings and are arranged in parallel in the transverse direction. A first rotating cylinder (7-1) and a second rotating cylinder (7-5) are respectively sleeved on the two groups of lower stirring shafts (7-3). The first rotating cylinder (7-1) is provided with a plurality of groups of first stirring blades (7-2) distributed along its axial direction, and the second rotating cylinder (7-5) is provided with a plurality of groups of second stirring blades (7-4) distributed along its axial direction.

6. The pelletizing machine for feed production according to claim 1, characterized in that: The mixing mechanism (10) comprises two groups of upper mixing shafts (10-3) which are rotatably connected to a mixing chamber (11) via rolling bearings and are arranged in parallel in a transverse direction. A mixing rotating sleeve (10-1) is installed on each upper mixing rotating shaft (10-3), and a plurality of bent mixing stirring rods (10-2) are installed on the mixing rotating sleeve (10-1).

7. The pelletizing machine for feed production according to claim 1, characterized in that: The rotary drive device comprises a main drive motor (14) installed on a main frame (1), the main drive motor (14) being connected to an extrusion screw (5); an upper transmission mechanism (13) is installed between the main drive motor (14) and the mixing mechanism (10) for driving the mixing mechanism (10) to operate; and a lower transmission mechanism (12) is installed between the extrusion screw (5) and the anti-blocking mechanism (7) for driving the two to operate synchronously.

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