RU2671331C1 - Mechanism of network replacement, granulator and method for replacing the net - Google Patents

Abstract

FIELD: manufacturing technology.SUBSTANCE: mechanism (10) for replacing the mesh for the granulator comprises: hopper (2), a rotating cylinder mounted in the hopper and a mesh configured to interact with the rotating cylinder, guide (101) located on the inside of the hopper, and sliding assembly (102) that is slidable and out of the hopper under the control of the guide device, while moving the mesh horizontally through opening (11) in the side of the hopper. Slide assembly includes: base (1020) and two end brackets (1021), one end of each of the end brackets being respectively hinged to one end of the base, and the free end of each of the end brackets is provided with shaft (1024a, 1024b) for the mesh to hold the corresponding end of the mesh. Guide device is configured such that the slide assembly can slide to a predetermined position within the hopper, and in this position the end brackets are arranged such that the mesh lying between the mesh shafts is tensioned and cooperates with the rotating cylinder. Granulator having the above-described grid replacement mechanism and a method for replacing a mesh using a mesh replacement mechanism are also described.EFFECT: mechanism for replacing the mesh for the granulator is proposed.23 cl, 6 dwg

Description

FIELD OF THE INVENTION

The invention relates to the technical field of granulation of materials and, in particular, adapted to a granulator (for example, a vibratory granulator) for the production of granules from powder material.

State of the art

Today in the food, pharmaceutical, chemical industries, etc. wet granulation technology prevails. Widely used vibratory granulators include, in particular, single-head vibratory granulators (granulators with one rotating cylinder) and double-head vibratory granulators (granulators with two rotating cylinders), primarily intended for the production of granules of the required size from wet mass or agglomerated dry material.

The grid of granulators currently available on the market is attached on both sides of the rotating cylinder only by means of a clamping device (for example, the upper and lower clamping rail assembly in Chinese patent CN204017790U). When replacing the mesh of such a granulator, it is necessary to disconnect the hopper body in order to install or remove the support shaft for the mesh, as well as the assembly of the mesh as a whole, which is a complex process. In addition, the accuracy of the installation of the grid cannot be guaranteed.

Currently available mesh replacement devices designed to replace the mesh do not completely solve problems with the replacement process, such as complex and time-consuming replacement, high cost of manual labor, inaccurate installation of the mesh, etc. For example, Chinese Patent CN202459361U describes a mesh clamping and wrapping device in which there is a clamping tube on each side of a rotating cylinder where an unused mesh is installed; if it is necessary to replace the mesh, part of the mesh is released from the clamping tube by adjusting with a handwheel. However, this design makes it impossible to accurately control the tension of the mesh, in particular when applied to a granulator with several rotating cylinders. In addition, if it is necessary to change the type of mesh, this operation is complex, time consuming and requires intense effort.

After replacing the mesh, the problem of adjusting the tension of the mesh arises, which directly affects the output of the granulator and the quality of the products. The existing mesh tension device pulls the mesh only locally, but cannot provide uniform mesh tension. The mesh tension rod described in Chinese Patent CN202288859U, for example, regulates the tension of the mesh from the end edge of the mesh by means of a ratchet mechanism by which it is difficult to stably control the tension required in the mesh, but the mesh can be easily damaged.

The present invention is intended to overcome the drawbacks and flaws of the mesh replacement and tensioning devices currently on the market in order to provide a more convenient, more efficient and more reliable mesh replacement mechanism and mesh tensioning mechanism in wet granulation technology.

Disclosure of invention

The aim of the present invention is to develop a mesh replacement mechanism and a mesh replacement method that provides simple and quick mesh replacement, and also saves on manual labor and resources.

According to one aspect of the invention, there is provided a mesh replacement mechanism for a granulator, wherein the granulator comprises a hopper, a rotating cylinder mounted in the hopper, and a mesh configured to interact with the rotating cylinder, the mesh replacement mechanism comprising:

a guide device located on the inside of the hopper;

the sliding unit, which is made with the possibility of sliding into and out of the hopper under the control of the guiding device, while transferring the grid in the horizontal direction through the hole in the side of the hopper, and the sliding unit includes:

base;

two end brackets, one end of each of the end brackets being respectively pivotally connected to one end of the base, and the free end of each of the end hinges is provided with a shaft for the mesh to hold the corresponding end of the mesh,

in this case, the guiding device is designed in such a way that the sliding unit can slide to a predetermined position inside the hopper, and in this position the end brackets are arranged so that the mesh lying between the mesh shafts is tensioned and interacts with the rotating cylinder.

The sliding unit of the mesh replacement mechanism related to this invention is made to slide into and out of the hopper like a drawer. Therefore, replacement is convenient and takes less time.

Preferably, the guiding device includes a guiding part of the base for guided sliding of the base and a guiding part of the bracket for guiding the movement of the end brackets.

Preferably, the guide portion of the bracket has a guide surface for guided movement of the free end of the end brackets and a bounding surface for limiting and positioning the free end of the end brackets.

Preferably, the link mechanism is located between the end brackets to provide communication when turning the end brackets. Due to the combined action of the lever mechanism and the guiding device, the end brackets and the base move uniformly along the corresponding predetermined path to ensure smooth movement of the sliding unit and the subsequent semi-automatic operation of the mesh replacement mechanism.

Preferably, the sliding unit further includes a support shaft for the mesh, configured to maintain the mesh between two adjacent rotating cylinders. In the case of a granulator with several rotating cylinders, the replacement and positioning of the mesh can be accomplished by simply providing it with the appropriate number of support shafts for the mesh. Therefore, the mesh replacement mechanism of the present invention is applicable to various types of granulators.

Preferably, the support shaft for the mesh is connected to the base by means of a connecting element of the support shaft.

Preferably, the end of the support member of the support shaft, remote from the support shaft for the mesh, is pivotally connected to the base.

Preferably, a mounting groove for the support shaft for the mesh is provided on the base. Thanks to the mounting groove, the support shaft for the mesh can be mounted on the base at a suitable level corresponding to the specific geometrical dimensions of the shaft, so that during the sliding of the sliding unit to provide movement of the support shaft for the mesh according to a given trajectory.

Preferably, the guiding device includes a guiding part of the connecting member for guiding the movement of the connecting member of the support shaft.

Preferably, the guide portion of the connecting member has a guide surface for guiding movement of the connecting member of the support shaft and a bounding surface for restricting and positioning the connecting member of the support shaft.

Preferably, between the connecting element of the support shaft and at least one end bracket, a linkage mechanism is arranged to provide communication when the connecting element of the support shaft and at least one end bracket are rotated.

Preferably, the linkage is an articulated mechanism.

Preferably, the mesh replacement mechanism further includes a locking and locking mechanism (e.g., a safety switch) for locking the sliding assembly in a predetermined position.

Preferably, the mesh replacement mechanism further includes an installation detection unit for determining whether the slide assembly is in place.

Preferably, the mesh replacement mechanism further includes an interlock detection unit for determining whether a locking and interlocking mechanism is locked.

Preferably, the guiding device further includes a guiding block located in an end region of the guiding part of the base for guiding the end brackets in such a manner as to cause interaction with the guiding part of the bracket.

Preferably, the guiding device includes a thrust surface for defining an end of the horizontal stroke of the base.

Preferably, the mesh replacement mechanism further includes a chipper connected to the end bracket or formed as an integral part thereof. The chipper is positioned so that it is preferable to direct the introduction of material into the working area of the grid to avoid wasting and accumulation of material.

In accordance with another aspect of the invention, there is provided a granulator including a mesh replacement mechanism illustrated above.

Preferably, the granulator has one or more rotating cylinders. In the case of a granulator with several rotating cylinders, the mesh replacement mechanism only needs to be modified by adding a supporting shaft for the mesh and a connecting element of the supporting shaft for the mesh without complicating the structure of the mechanism.

In accordance with another aspect of the invention, there is provided a method for replacing a mesh using a mesh replacement mechanism, comprising the steps of:

1) pulling the slip assembly from the hopper;

2) disconnecting the used mesh and laying a new mesh of a given length between the shafts for the mesh, with two ends of the mesh being attached to the shafts for the mesh;

3) pushing the sliding unit carrying the net into the hopper at a predetermined position using a guiding device;

4) rotation of the end bracket of the sliding unit, closest to the hole of the hopper, in a predetermined position;

5) blocking the slip unit to hold the mesh over it in the working position (or in the standby position).

After step 4) and before step 5), it is preferable to carry out the step of determining whether the slide assembly is in place.

After step 5), it is preferable to carry out the step of determining whether the slip assembly is locked.

The mesh replacement mechanism and the mesh replacement method of the present invention realize the semi-automatic replacement and installation of the mesh, which greatly simplifies the replacement operation and reduces the time required to replace the mesh, and prevents an error in operation due to manual operation.

Brief Description of the Drawings

Signs and advantages of examples of the invention will become apparent with reference to embodiments and drawings, in which:

in FIG. 1 is a perspective view of a mesh replacement mechanism assembly and a mesh tension mechanism in accordance with the present invention;

in FIG. 2 shows a hopper when the mesh replacement mechanism in accordance with the present invention is inoperative, the mesh replacement mechanism not shown;

in FIG. 3 is a perspective view of a mesh replacement mechanism in accordance with the present invention, inoperative;

in FIG. 4 is a perspective view of a mesh replacement mechanism in accordance with the present invention in a working position;

in FIG. 5 is a perspective view of a mesh tension mechanism in accordance with the present invention;

in FIG. 6 is a structural view of a tension force control unit of a mesh tension mechanism in accordance with the present invention.

The implementation of the invention

The following is a description of the present invention with reference to embodiments shown in the drawings. Wherever possible, the same reference numbers are used throughout the drawings to indicate the same or similar components.

The granulator in accordance with the invention includes a power transmission unit and a granulation unit 1 driven by a power transmission unit. The granulation unit 1 includes a hopper 2, a rotating cylinder installed in the hopper, a mesh below the rotating cylinder, a mesh replacement mechanism 10 for replacing the mesh, and a mesh tensioning mechanism 20 for mesh tension. In order to clearly show the mesh replacement mechanism 10 and the mesh tension mechanism 20 of the invention, FIG. 1, the upper part of the hopper, the rotating cylinders in the hopper and the mesh interacting with the rotating cylinders are not shown.

In FIG. 2 is a schematic view of the mesh replacement mechanism 10 of the invention, which is partially inside the hopper 2, the hopper being partially shown, and the rotating cylinders are shown schematically in the form of circles.

The mesh replacement mechanism 10 includes a guide device 101 provided on the inside of the hopper, and a sliding unit 102 that carries the mesh and is slidable into and out of the hopper 2 through an opening in the side of the hopper and guided by the guide device 101. Preferably, the guide device 101 includes a guide located in the inner side wall of the hopper. The guide may be made in the form of a groove or protrusion having a cross section made with the possibility of interaction with the corresponding design on the sliding unit.

As can be seen from FIG. 3 and 4, the sliding unit 102 includes a base 1020, which is made in the form of a frame, as shown in the drawings, but can be made in other forms, for example, in the form of a beam. The base 1020 includes two opposite elongated elements 1020a, 2020b. End brackets 1021 are pivotally attached to the two ends of the base. A swivel connection between the end brackets and the base is achieved using a pivot 1022. Each end bracket 1021 includes two bracket levers 1021a, 1021b located opposite each other, between which a fender 1023 is preferably located for guiding granules in the region below the working area of the grid and thereby prevent the granules from falling into the inoperative region and wasting them.

At the free end of the arm lever 1021a, 1021b, a mesh shaft 1024a, 1024b is mounted to hold the corresponding end of the mesh. In the embodiment shown in the drawings, the mesh shaft is provided with a plurality of holes 1025 spaced at some intervals for passing fasteners, such as screws. After laying in the longitudinal direction of the shaft for the mesh in predetermined final positions, the mesh is fixed by screwing bolts or screws into the holes.

In the embodiments shown in FIG. 3 and 4, each of the elongated elements 1020a, 1020b is pivotally connected to a support shaft connecting element 1026a, 1026b in a predetermined position (for example, using a pin) along its longitudinal direction. At the free ends of the connecting elements of the support shaft 1026a, 1026b, a support shaft 1027 is installed for the mesh, which extends across the elongated base elements 1020 through them and protrudes beyond the outer side of the elongated elements and which is adapted to engage with the mounting groove 1028 of the base when the sliding unit is located in horizontal position. The weight of the support shaft for the mesh is supported by the base. The position of the axis of the support shaft for the grid in height relative to the level of the base is determined depending on the depth of the groove. The support shaft for the mesh is configured to maintain the mesh between adjacent rotating cylinders. The number of support shafts for the grid is completely dependent on the number of rotating cylinders. Therefore, if the granulator has only one rotating cylinder, there is no need to include a support shaft for the mesh in the mesh replacement mechanism.

In a preferred embodiment, the articulation between the opposite end brackets 1021 and between the arms 1021a, 1021b of the bracket of the end brackets 1021 and the connecting elements 1026a, 1026b of the support shaft is achieved using the lever mechanism 1029. The lever mechanism is made in the form of a hinge mechanism shown in the drawings , although those skilled in the art may consider the linkage mechanism of other configurations, for example, a transmission mechanism by a rack, a lead cable, and the like. The lever mechanism 1029 in the embodiment shown in the drawings includes a first link 1029-1 located between the end bracket bracket lever 1021a, 1021b and a support shaft connecting member 1026a, 1026b, and a second link 1029-2 located between the other lever 1021a, 1021b the end bracket and the connecting shaft 1026a, 1026b of the support shaft. Thus, the rotation of one end bracket (for example, during oscillatory upward movement of the end bracket passing into the hopper) drives the first link 1029-1, which leads to a forced rotation of the connecting element of the support shaft (i.e. the connecting element of the support shaft, respectively oscillates upward). In the case of rotation of the connecting element of the support shaft, the second link 1029-2 is driven, causing the rotation of the other end bracket (i.e., the end bracket closest to the hopper hole 11 oscillates upward). Finally, when the end brackets are moved to certain angular positions, the entire sliding unit is in a position or state, i.e. in the operating position (standby position), where the end brackets and connecting elements of the support shaft are directed vertically, as shown in FIG. 4. The lever mechanism may also drive the end brackets and connecting elements of the support shaft or facilitate their switching from the working position to the replacement position (that is, when the end brackets and connecting elements of the support shaft are in a substantially horizontal position).

The mesh is mounted in such a way that in the operating position shown in FIG. 4, the rotating cylinder is partially wrapped in a net. One end of the mesh is attached to the mesh shaft 1024a, and the other end thereof is attached to the other mesh shaft 1024b. As an example, take a mesh that combines with two rotating cylinders (a mesh is essentially W-shaped), the recessed sections touching the lower parts of the circumscribed circles of the rotating cylinders, and the intermediate curved part of the mesh for tensioning passes through the support shaft 1027 for the mesh and is supported in this way. Since the mesh has a predetermined length, the degree of tension in the working position is determined by the level of the position of the shafts for the mesh and the support shaft for the mesh, as well as the horizontal interval between them.

As shown in FIG. 2, the guide device 101 includes a base guide portion 101a for a guided slide of the base and a bracket guide portion 101b for the guided movement of the end brackets. The guide portion 101b of the bracket has a guide surface 101b1 for guided movement of the free end of the end bracket and a limiting surface 101b2 for limiting and positioning the free end of the end bracket. Due to the action of the guide surface 101b1 and the restrictive surface 101b2, the guided end bracket moves with difficulty and can be easily moved from the working position to the replacement position or from the replacement position to the working position.

It should be noted that the term "free end" in this document refers to the end relative to the end (ie, pivotally attached end) of the end bracket or connecting element of the support shaft connected to the base, but it is not really free and is limited to other components, such as a grid.

Preferably, the guide device 101 further includes a first guide block 101c located in an end region of the guide part of the base for guiding the end bracket in such a way as to integrate it with the guide part of the bracket in the corresponding sliding position. The guide device 101 further includes a thrust surface 101d for defining the end of the horizontal stroke of the base. When the base is mixed by sliding close to the abutment surface, the end bracket also enters its target position, i.e. the entire slip assembly enters into working position.

In the preferred embodiment shown in the drawing, the guide device 101 further includes a guide portion 101e of the coupling member for guiding the movement of the coupling member of the support shaft. Preferably, the guide portion 101e of the coupling member has a guide surface 101e1 for guidingly moving the coupling member of the support shaft and a restrictive surface 101e2 for restricting and positioning the coupling member of the support shaft. Preferably, the guide portion of the connecting member can be configured to include a second guide block for guiding the connecting member of the support shaft so that, in an appropriate position, the connecting member of the support shaft interacts with the guide part of the connecting member.

In the embodiments shown in the drawings, instead of a sliding unit, a second guide unit can be dispensed with, since the lever mechanism is arranged to force, in the corresponding sliding position, the connecting element of the support shaft to rotate, i.e. the turning energy of the connecting element of the support shaft is partially supplied from the lever mechanism.

In addition, the mesh replacement mechanism 10 further includes a locking and locking mechanism 8 (for example, a safety switch) for locking it in the operating position when it is in the operating position.

Preferably, the mesh replacement mechanism 10 further includes an installation detection unit for determining whether the end bracket or the slide assembly is properly installed (fully engaged). The mesh replacement mechanism 10 further includes a locking detection unit for determining whether the locking and locking mechanism 8 is locked.

Preferably, the mesh is woven from a metal wire (which can be made of type 316L or type 304 stainless steel, and the mesh range and wire diameter, which depend on the granular products, are usually 2380-841 μm (8-20 mesh)) or plastic wire ( which can be, for example, from nylon, and the range of the mesh and the diameter of the wire, which depend on the granular products, are usually 2380-841 microns or (8-20 mesh)).

Although the bunker is provided with two rotating cylinders in this document, those skilled in the art may consider such a mesh replacement mechanism to be used in a bunker with one or more than two rotating cylinders.

To more clearly show the structure of the mesh replacement mechanism, a detailed description of its operation principle will be given below.

1) During mesh replacement, the locking and locking mechanism is opened to move from a vertical position (shown in Fig. 1) to a horizontal position. The base is pulled out of the hopper outward in a horizontal direction, while simultaneously turning down the end bracket closest to the hole 11 of the hopper. During this process, the end bracket on the inside of the hopper turns down under the action of the linkage and moves by sliding along the guide surface of the guide part of the bracket until it reaches a horizontal position (as shown in Fig. 2). During the process, the connecting element of the support shaft rotates downward under the action of the lever mechanism and moves by sliding along the guide surface of the guide part of the connecting element until it reaches a horizontal position, and, ultimately, the support shaft for the mesh enters the installation groove. Now the entire sliding unit can successfully be moved by sliding along the guide part of the base in the horizontal direction, i.e. the entire mesh replacement mechanism is completely disconnected from the hopper.

2) The used mesh is removed, and a new mesh of a given length is laid on top of the sliding unit and distributed in the appropriate proportion for each rotating cylinder, the two ends of the new mesh being bolted to the shaft for the sliding unit mesh.

3) During the installation of the mesh, the locking and locking mechanism 8 is directed horizontally, and the sliding unit carrying the mesh is pushed into the hopper along the guide part of the base. Having reached the position of the guide block 101c, the end bracket under the control of the guide block enters the area of the predetermined guide part of the bracket to continue sliding forward. Now, the guide surface of the guide part of the bracket guides the rotation of the end bracket, and the restrictive surface of the guide part of the bracket limits the angle of rotation of the end bracket. At the same time, the lever mechanism of the sliding assembly enters into general work to ensure synchronous rotation of the end bracket and the connecting element of the support shaft, which are close to the hole. The slip assembly reaches a predetermined position (or the operating position of the mesh slip assembly) when the base reaches its destination in the hopper (when the base comes into contact with the abutment surface on the left side of the base guide portion). In this predetermined position, the end bracket and the connecting element of the support shaft are rotated to a certain angular position relative to the base, and the mesh lying on the sliding unit is suspended in a W-shape under the rotating cylinders at a certain degree of tension.

4) Further, the horizontally located locking and locking mechanism 8 is rotated into a vertical position and locked. Locking is performed by the locking and locking mechanism of the grid with a safety switch. The installation detection unit and the interlock detection unit with two sensors (infrared or contact type) are used to detect whether the end bracket and the locking and locking mechanism are properly installed, which is advantageous for ensuring safe operation.

Now the granulator can be launched for production. Rotating cylinders begin to oscillate. Powder material is fed into the hopper and the area of the rotating cylinder. Due to the force exerted by the scrapers on the peripheral surface of the rotating cylinders, a friction force arises between the material and the mesh, and the powder material is squeezed out through the mesh openings to form granular products of the required size.

When a mesh replacement is required, the above steps 1) –4) are repeated.

In actual production, the mesh should be replaced every 2 hours. The mesh replacement mechanism of the present invention saves 5-6 minutes on each replacement and, thanks to the fully automatic operation, not only simplifies mesh replacement, but also prevents errors caused by manual operation, which improves the granulation efficiency, reduces the cost of production and ensures quality product.

To further improve production efficiency, additional adjustment or optimization of the degree of mesh tension is required for the mesh replacement mechanism of the present invention. Since the mesh replacement mechanism of the present invention can be applied to a granulator with several rotating cylinders, the suitability of a conventional mesh tensioner to adjust the degree of mesh tension by rotating the shaft for the mesh is clearly limited. Therefore, the author of this application for an invention proposes a mesh tension mechanism that is able to adjust the degree of mesh tension in a more flexible and reliable way than modern mesh tensioners. In particular, the mesh tension mechanism in accordance with the present invention is adapted for a granulator with several rotating cylinders.

As shown in FIG. 1, the mesh tension mechanism 20 includes a tension force control unit 201, a mesh lift unit 202 configured to raise or lower the rod of the mesh holder (i.e., a shaft for the mesh and / or a support shaft for the mesh), a power transmission unit 203 made with the possibility of transferring the output from the control unit to the tension force in the block lifting the mesh. The tension force control unit 201 includes a force input device 2011, a force controller 2012 configured to control a force input from the force input device, and a force output device 2013 configured to output the adjusted force.

As shown in FIG. 5, the force input device 2011 is made in the form, for example, of a tension handwheel, by means of which a tension force is introduced and with which it is easy and quick to work, saving manual labor and resources. The device 2013 output power is made in the form of a rocker. The force regulator 2012, which is shown in FIG. 6 includes a rotating member 2012-1 for receiving a force input, a tension shaft 2012-3 located coaxially with the rotating member and configured to rotate about an axis, and an elastic assembly 2012-4 located between the rotating member and the tensioning shaft.

Preferably, the rotating member 2012-1 includes a worm 2012-10 and a worm gear 2012-20 operating in conjunction with the worm, which preferably has a self-locking function to provide a stable and continuously adjustable tension force. The tension force is controlled by means of a gear consisting of a worm and a worm gear so that a smooth adjustment of the tension force can be ensured and that the tension force can be controlled in any controlled range. This will prevent unstable control of the tension force using the traditional ratchet mechanism, eliminate damage to the mesh due to unstable tension forces, and is also useful for ensuring product quality, extending the life of the mesh and providing a stable and controlled mesh tension force.

Preferably, the elastic assembly 2012-4 includes a rubber elastic assembly that is formed by a square inner metal shell, a square outer metal shell located around the square inner shell, and a cylindrical member that is pressed into the space between the inner and outer metal shells deflected in 45 °. To achieve efficient transmission of rotation between the worm gear and the elastic unit, a shaft clutch 2012-2 is located between them. Due to the action of elastic deformation and energy storage of the elastic node 2012-4, a difference in the rotation speed between the worm gear and the tension shaft is created, and due to the shock-absorbing and damping action of the elastic node, a large output power of the tension shaft is prevented.

Preferably, the force input device 2011 is connected to the worm without being rotated or formed as an integral part of the worm. Preferably, the force output device 2013 is connected to the worm without the possibility of rotation or is formed as an integral part of the tension shaft 2012-3. In the embodiment shown in FIG. 6, the force output device is connected to the tension shaft 2012-3 directly by means of a catheter connection 2012-5 and a screw to enable synchronous rotation of the tension shaft 2012-3 and the force output device 2013.

As shown in FIG. 5, the power transmission unit 203 includes a lifting rod 203-1, one end of which is pivotally connected to the force output device 2013 so that they can slide relative to each other in the horizontal direction, and the other end of which is pivotally connected to the hopper wall using fixed finger 203-1a.

In the embodiment shown in the drawing, the connection structure between the lifting bar and the force output device includes an elongated hole and a tab protruding into the elongated hole. However, specialists in this field can consider other configurations (for example, a structure with hooks and loops), if only the connection structure would satisfy the requirements for rotation and relative sliding between the lifting bar and the power output device. In the shown embodiment, the elongated hole is in the lifting rod, and the tab is located on the force output device. Specialists in this field, of course, may consider providing a foot on the lifting rod and the placement of the matching elongated hole in the power output device.

Block 202 lifting the mesh is made in the form of a bracket having the shape of a frame formed by rigidly connecting the opposing lifting arms 202-1 and the opposing lifting shafts 202-2. The lifting arms 202-1 are rigidly connected to the lifting rod 203-1 by means of the fastener 203-1b so that the lifting rod 203 drives the lifting lever 202-1 to raise and lower during rotation around the fixed finger 203-1a.

As shown in FIG. 3, the lifting shafts are located below the base and support the base so that the lifting shafts are in contact with the elongated base members 1020a, 1020b. The upward movement of the lifting levers 202-1 and the movement of the lifting shafts 202-2 occur synchronously, so the upward movement of the lifting shafts 202-2 allows the base of the mesh replacement mechanism and the mesh shaft supporting it or the mesh support shaft to rise and lower together to further control the lift and lowering the grid, i.e. adjust the tension of the mesh. The mesh tension mechanism of the present invention controls the tension force by adjusting the raising and lowering of the entire mesh so that the applied tension force is symmetrical. A traditional mesh tensioner controls the tension by means of a ratchet mechanism, and tension is usually performed successfully on one of the two sides of the mesh, which can lead to an imbalance (uniformity) of the tension force and local damage to the mesh.

Preferably, the lifting arm, the power transmission unit and the tension force control unit are located on the outside of the hopper so that material does not accumulate on most components of the mesh tension mechanism. This design facilitates cleaning and meets the hygienic requirements of a food processing machine.

The mesh tension mechanism 20 further includes a graduated tension force adjusting disk 2014 that is configured to visualize the output (i.e., mesh tension force) of the force output device. Traditionally, the measurement of the tension force is carried out using a torque wrench, and the measurement value varies depending on the person making the measurement. Therefore, the advantage of the mesh tension mechanism 20 in accordance with the present invention is that it visualizes the adjustment of the tension force and prevents the delay and inaccuracy of the traditional measurement of the tension force.

Preferably, a separate guide is provided inside the hopper to guide the raising and lowering of the mesh shaft, the mesh support shaft or mesh replacement mechanism to ensure the accuracy of the mesh path.

The following briefly illustrates the workflow of the mesh tension mechanism.

When it is necessary to adjust the degree of mesh tension, the 2011 handwheel is turned manually to make the worm turn and then make the worm gear turn. The worm gear applies torque to the resilient assembly via the shaft engagement clutch 2012-2 so as to slightly deform the resilient assembly to perform energy storage and damping. Therefore, the torque is reduced. In other words, only part of the torque is transmitted to the tension shaft to actuate the tension shaft and rotate the force output device. Take the tensioning process as an example: during a pivot movement, the force output device 2013 exerts a lifting force on the lifting rod 203-1, while a rotational movement occurs at the end of the force output device, and the tab provided on this end moves by sliding into the elongated opening of the lifting rods 203-1. Thus, the end of the lifting rod connected to the force output device rises, and as a result, the lifting rod 203-1, configured to rotate around a fixed finger rigidly mounted on the hopper, raises the lifting arms of the mesh lifting unit. After that, the lifting shaft 202-2 helps the base of the mesh replacement mechanism to rise to move the mesh shaft and the support shaft for the mesh vertically so as to raise the mesh to increase contact between the mesh and the rotating cylinder, i.e. to further stretch the mesh. In addition, in order to avoid excessive mesh tension, you can turn the handwheel in the opposite direction to lower the level of the shaft for the mesh and the support shaft for the mesh.

Industrial application

In practice, the mesh replacement mechanism and the mesh tension mechanism of the present invention are preferably used in conjunction and, in particular, with a granulator with several rotating cylinders.

During mesh replacement, the lifting shaft of the mesh tension mechanism is moved by turning the handwheel to the lower position, preferably to the bottom of the recess 6 in the hopper wall shown in FIG. 1. In other words, there is no contact between the lifting shaft and the base of the mesh replacement mechanism, or the lifting shaft is in a position that does not affect the sliding of the base along the guide portion of the base. The position of the mesh tension mechanism is fixed due to the self-locking function of the worm and the worm gear. Now the locking and locking mechanism of the mesh replacement mechanism can be opened to pull the sliding assembly out of the hopper. Outside the hopper, the mesh is replaced, and then a sliding assembly carrying a new mesh is pushed into the hopper to place it in the working position. Upon completion of the mesh installation, the mesh tension mechanism is adjusted to control the mesh tension force.

The above are only examples of the implementation of the granulator. The granulator is not limited to the specific embodiments described herein, but rather, each of the components can be used independently and separately from the other components described herein. The terms “example”, “another example”, “examples”, etc. mean that the component / element (for example, structural part, structure and / or function) related to example (s) is contained in at least one of the examples herein, but may or may not be introduced in other examples. In addition, it should be understood that more elements from any illustrated examples may be combined in any way in numerous other examples, unless otherwise indicated.

When presenting elements / components / etc. granulator described and / or illustrated herein, the presence or absence in front of them of the words "this / this / this / these", "mentioned / mentioned / mentioned / mentioned" means that there are one or more of these elements / components / and t .P. The terms “including”, “comprising” and “having” are intended to indicate inclusion and mean that in addition to the listed elements / components / and the like. additional elements / components / etc. may exist.

In the present written description, examples are used to disclose the invention, including the best method, and also to enable any person skilled in the art to put the invention into practice. The patentable scope of the invention is defined by the claims and may include other examples that are obvious to experts in this field. Such other examples should fall within the scope of the claims if they contain structural elements that do not differ literally from those described in the claims, or if they contain equivalent structural elements with insignificant differences from the literally described in the claims.

List of Reference Numbers

1 - granulator 11 - hole 2 - hopper 101 - guide device 10 - mesh replacement mechanism 101a - guide part of the base 101b - guide part of the bracket 6 - in-depth section 101b1 - guide surface 8 - locking and locking mechanism 101b2 - boundary surface 20 - mesh tension mechanism 101c is the first guide block 201 - tension control unit 101d - thrust surface 2011 - power input device 101e - guide part of the connecting element 2012 - power regulator 101e1 - guide surface 2012-1 - rotating element 101e2 - boundary surface 2012-10 - the worm 102 - slip unit 2012-20 - worm gear 1020 - base 2012-2 - shaft clutch 1020a, 1020b - elongated element 2012-3 - tension shaft 1021 - end bracket 2012-4 - elastic knot 1021a, 1021b - bracket lever 2012-5 - catheter connection 1022 - king pin 202 - block lifting mesh 1023 - chipper 202-1 - lifting lever 1024a, 1024b - shaft for mesh 202-2 - lifting shaft 1025 - hole 203 - power transmission unit 1026a, 1026b - connecting
support shaft element 203-1 - lifting bar 1027 - support shaft for mesh 203-1a - fixed finger 1028 - installation groove 203-1b - fastener 1029 - lever mechanism 2013 - power output device 1029-1 - the first link 2014 - graduated disk 1029-2 - second link

Claims (33)

1. The mechanism of replacing the mesh for a granulator containing a hopper, a rotating cylinder installed in the hopper and a mesh configured to interact with the rotating cylinder, which contains: a guide device located on the inside of the hopper; the sliding unit, which is made with the possibility of sliding into and out of the hopper under the control of the guiding device, while transferring the grid in the horizontal direction through the hole in the side of the hopper, and the sliding unit includes: base; two end brackets, one end of each of the end brackets respectively being pivotally connected to one end of the base, and the free end of each of the end brackets provided with a shaft for the mesh to hold the corresponding end of the mesh, in this case, the guiding device is designed in such a way that the sliding unit can slide to a predetermined position inside the hopper, and in this position the end brackets are arranged so that the mesh lying between the mesh shafts is tensioned and interacts with the rotating cylinder. 2. The mesh replacement mechanism according to claim 1, characterized in that the guide device includes a guide part of the base for guided sliding of the base and a guide part of the arm for guided movement of the end brackets. 3. The mesh replacement mechanism according to claim 2, characterized in that the guide portion of the bracket has a guide surface for guided movement of the free end of the end brackets and a bounding surface for limiting and positioning the free end of the end brackets. 4. The mesh replacement mechanism according to claim 1, characterized in that a link mechanism is located between the end brackets to provide communication when the end brackets are rotated. 5. The mesh replacement mechanism according to claim 1, characterized in that the sliding unit further includes a mesh support shaft configured to support the mesh between two adjacent rotating cylinders. 6. The mesh replacement mechanism according to claim 5, characterized in that the support shaft for the mesh is connected to the base by means of a connecting element of the support shaft. 7. The mesh replacement mechanism according to claim 6, characterized in that the end of the connecting element of the support shaft, remote from the support shaft for the mesh, is pivotally connected to the base. 8. The mechanism for replacing the mesh according to claim 7, characterized in that on the basis of the installation groove is provided for the support shaft for the mesh. 9. The mesh replacement mechanism according to any one of paragraphs. 5-8, characterized in that the guide device includes a guide part of the connecting element for the guided movement of the connecting element of the support shaft. 10. The mesh replacement mechanism according to claim 9, characterized in that the guide part of the connecting element has a guiding surface for guiding movement of the connecting element of the support shaft and a limiting surface for limiting and positioning the connecting element of the support shaft. 11. The mesh replacement mechanism according to claim 10, characterized in that between the connecting element of the support shaft and at least one end bracket is a link mechanism for providing communication when the connecting element of the support shaft and at least one end bracket are rotated. 12. The mesh replacement mechanism according to claim 4 or 11, characterized in that the linkage mechanism is an articulated mechanism. 13. The mesh replacement mechanism according to claim 1, characterized in that it further comprises a locking and locking mechanism for locking the sliding assembly in a predetermined position. 14. The mesh replacement mechanism according to claim 1, characterized in that it further comprises an installation detection unit for determining whether the sliding unit is in place. 15. The mesh replacement mechanism according to claim 13, characterized in that it further comprises a blocking detection unit for determining whether a locking and blocking mechanism is locked. 16. The mesh replacement mechanism according to claim 1, characterized in that the guide device further includes a guide block located in the end region of the guide part of the base, for guiding the end bracket in such a way as to lead to interaction with the guide part of the bracket. 17. The mesh replacement mechanism according to claim 1, characterized in that the guide device further comprises a thrust surface for defining the end of the horizontal stroke of the base. 18. The mechanism for replacing the mesh according to claim 1, characterized in that it further comprises a chipper connected to the end bracket or formed as an integral part thereof. 19. A granulator comprising a mesh replacement mechanism according to any one of the preceding claims. 20. The granulator according to claim 19, characterized in that it has one or more rotating cylinders. 21. The method of replacing the mesh using the mesh replacement mechanism according to any one of paragraphs. 1–18, which includes the stages: 1) pulling the slip assembly from the hopper; 2) disconnecting the used mesh and laying a new mesh of a given length between the shafts for the mesh, with two ends of the mesh being attached to the shafts for the mesh; 3) pushing the sliding unit carrying the net into the hopper at a predetermined position using a guiding device; 4) rotation of the end bracket of the sliding unit, closest to the hole of the hopper, in a predetermined position; and 5) blocking the slip unit to hold the mesh over it in the working position. 22. The method of replacing the mesh according to claim 21, characterized in that after stage 4) and before stage 5), the step of determining whether the sliding unit is in place is performed. 23. The method of replacing the mesh according to claim 21, characterized in that after step 5), the step of determining whether the sliding assembly is locked is performed.

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