DK179342B1 - Mixer - Google Patents

Abstract

Mixer, for example, a forced mixer, comprising at least one container provided with a device for forced mixing raw materials into a finished product, the container having an opening for receiving raw materials, and an opening for passing the finished product out of the container, wherein at least one of the aforementioned openings is provided with a safety grating wherein the safety grating for inlet and / or for outlet is provided with a device which generates oscillatory movements in the form of vibrations in order to prevent clogging of the grating with raw materials or finished product.

Description

< ¹ θ> DENMARK (10)

< ¹² > PATENT WRITING

Patent and

Trademark Office (51) ID: B 01F 11/00 (2006.01) B 28 C 5/08 (2006.01) B 28 C 7/16 (2006.01) (21) Application number: PA 2016 00132 (22) Filing date: 2016- 03-01 (24) Running day: 2016-03-01 (41) Aim. available: 2017-09-02 (45) Patent Notice bkg. on: 2018-05-14 (73) Patent holder: STARING MASKINFABRIK A / S, Starengvej 9 -11,9700 Brønderslev, Denmark (72) Inventor: Tommy Bredal, Grønagervej 8, 9760 Vrå, Denmark (74) Prosecutor: HØYER PATENT ApS , Højbovangen 36, 9200 Aalborg SV, Denmark (54) Title: Mixer (56) Publications cited:

EP 1669180 A2 US 2552163 A DE 2236993 A1 DE 3107423 A1 JP 2008194853 A (57) Summary:

Mixer, for example, a forced mixer, comprising at least one container provided with a device for forcibly mixing raw materials into a finished product, the container having an opening for receiving raw materials, and an opening for passing the finished product out of the container, wherein at least one of the aforementioned openings is provided with a safety grating wherein the safety grating for inlet and / or for outlet is provided with a device which generates oscillatory movements in the form of vibrations in order to prevent clogging of the grating with raw materials or finished product.

To be continued ...

in

Mixer.

The present invention relates to a mixer as set forth in the preamble of claim 1.

By a mixing machine is meant, for example, a forced mixer, a countercurrent mixer and others. which is used in the construction industry without being construed as limiting the scope or scope of the invention.

Mixing machines are characterized by comprising a container provided with a device for mixing raw materials into a finished product, the container having an opening for receiving raw materials and an opening for passing the finished product out of the mixer's container.

For purposes of explanation of the invention, without limiting this in any way to the scope of application of the application, as an example, forced mixers are used for the manufacture of concrete, abrasive layers and mortar. Concrete, abrasion and mortar are made from solid raw materials, such as sand, gravel, cement, water and more. and mixed to an appropriate consistency in the mixer.

Forced mixers for making concrete, abrasion and mortar are available in several variants and sizes. Thus, a compulsory mixer may be a stationary plant adapted to process large quantities of raw materials in the manufacture of concrete, abrasion or mortar. In addition, there are also mobile plants that enable the practical and demand-controlled production of concrete or mortar directly on the construction site. For an example of such a mobile plant in the form of a compulsory mixer, please refer to DK 2006 00321 U3, Staring Maskinfabrik A / S.

Necessary great effort must be exerted to coerce the raw materials in the manufacture into the finished product. Therefore, there are also high requirements for personal safety to prevent people from coming into contact with the moving parts of the mixer.

The authorities therefore stipulate that the inlet of the forced mixer, which is arranged to receive raw materials into the container, must be protected with a grille to ensure that persons cannot come into contact with the moving parts. This grid must be designed in accordance with standard EN 12151: 2007.

Further, it is a requirement that the mixer outlet, for removing the finished product, is provided with a grille which ensures that persons are prevented from coming into contact with the movable mixer parts. This must also be in accordance with EN 12151: 2007.

Do not ignore personal safety at work. However, the statutory requirements can be a major disadvantage for the construction workers, as the raw materials have the effect of stopping the grid in the inlet. The problem appears both on the grid in the inlet and on the grid in the outlet. Therefore, on the grate for discharge of ready-mixed material, it is necessary to continuously remove the build-up of material on and in the grid during the discharge point. This causes some manual labor and irritation. The problem is of course greater when the raw materials include larger stones, cement or other that can harden, solidify or lump or otherwise build a layer on the grid under the discharge limb. Likewise, the problem may arise when mixing more dry and sticky material which is not so liquid and which is difficult to remove. Especially when mixing fine-grained material where there is often less water in the mixture, there is a tendency for the material to pack in the outlet. The moment of annoyance is so great that the construction workers, in frustration, either remove the grid for inlet or outlet, or make a hole in it, after which the forced mixer is no longer legal and can potentially cause personal injury.

EP 1 669 180 A2 describes a compulsory mixer of the kind described in the preamble. Here it is stated that the forced mixer is provided with a vibration device which is arranged with oscillations and

The vibration system for inserting the inlet grille to avoid clogging can be activated independently of the forced mixer and is e.g. electrically powered

The solution is excellent so far but makes the composite mixer more complicated to build and thus also more expensive to manufacture. An alternative solution is sought, which is simpler and cheaper to build.

It is therefore necessary to provide an alternative solution to the outlined problem that the openings for the inlet and outlet of the forced mixer are clogged by raw materials and finished product respectively, without compromising the high requirements for personal safety.

This is provided by the invention by designing the forced mixer as described in claim 1, wherein the mixing machine is provided with a device adapted to generate oscillatory movements in the form of vibrations comprising at least one resilient member, which resilient member is secured in the one end of the grating and the other end extending from the safety grating in such a direction that the other and free ends of the resilient member are arranged in an area of the mixer container for mixing materials where it can meet by the mixer device for mixing of raw materials.

In the prior art, the device is designed with an active generator which is, for example, electrically, hydraulically or mechanically driven and is thus independent of whether the forced mixer is in operation and makes a mixture.

When used here, the term active is meant a standalone unit not directly connected or driven by the rotary parts of the forced mixer, including the motor. Thus, a mechanically driven vibrator may be driven by a motor dedicated to this purpose and independent of the forced mixer operation. More specifically, an active generator works independently of whether or not the forced mixer makes a mixture. An active generator can thus be mounted directly on the inlet or outlet grating or at another position on the mixer where it is ensured that the vibrations propagate to the grating and have an effect on the grating's ability to shake up accumulations.

In one embodiment, the device is configured with a passive generator. In one embodiment, a passive generator is mechanically driven. The device is thus driven by the movement of the forced mixer and is dependent on whether the forced mixer is operating and mixing.

In the prior art, an electric vibrator is arranged in conjunction with the grating in such a manner and with a suitably set frequency that the vibrator can cause the grating to vibrate. Exposed to vibration and with gravity as a contributing factor, the material will help to fall through the grating, thereby reducing or completely preventing the grating from clogging.

In another embodiment, the device comprises at least one arm formed of a resilient material hereinafter referred to as a resilient member, which resilient member is secured at one end of the grating and the other end pivoting from the grating in such a direction that the free end thereof resilient member is arranged in an area of the mixer container for mixing materials where it can be met by the mixer device for mixing raw materials, also called a rotary vane.

In one embodiment, the resilient member, for example a piece of spring steel or the like, is thus adapted to deform in a flexible manner when the raw material of the mixer meets the resilient member of the resilient mixture mixing device and is then released when the raw material mixing device passes by. the resilient member again swings back to its initial position during the release of an oscillating vibration-creating motion.

In one embodiment, the resilient member is disposed on the grid for inlet and thus, each time it is met by the device for mixing raw materials, vibrates in the grid for inlet and seeks to shake material free of the grid.

In another embodiment, the resilient member is disposed on the grating for outlet and thus, each time it is met by the raw material mixing device, vibrates in the grating for outlet and seeks to shake material free of the grating.

Since the grating for outlet is only passed through material upon discharge of the mixer contents after a mixture is made, the outlet is provided with a closing mechanism which prevents the material from flowing out of the mixer. In one embodiment, the outlet closure mechanism is adapted to deform the resilient member so that it is forced away from the area where it can be collided with the raw material mixing device. Of course, the deformation of the resilient member is not sustained, so that when the closing mechanism opens again for passage between container and outlet, the resilient member again assumes its original shape and position where it can be collided with the raw material mixing device. In one embodiment, the closure mechanism is arranged to isolate the resilient member away from collision with the raw material mixing device by enclosing the resilient member in the outlet container.

When the resilient arm is referred to as a resilient member, it is understood that a resilient member is a device designed to produce vibrations and can assume all conceivable forms of a member with a free end that can be pivoted for the desired purpose.

The material selection of the resilient element can be taken freely on the basis of the desired spring capacity, ability to absorb vibrational energy (weight) and wear resistance. Although metal is preferred, resilient elements made of plastic, carbon fiber, ceramic materials etc. could be used if the design is based on the properties of the given materials.

The resilient member is in one embodiment formed of at least one piece of resilient flat steel. More specifically, it may be a strip-shaped piece of resilient band iron. The advantage of a flat element is that the vibrations are controlled in a certain direction by the flat element being most easily brought in oscillations perpendicular to the largest surface. The dimensions of a piece of flat material for use as a resilient element, including length, width and thickness ratios, can thus be used effectively to design an element with the properties of frequency and power that most effectively form the vibrations that help the grid prevent clogging with material.

In yet another embodiment, the resilient member is formed of at least one resilient circular iron. With a round material, oscillations in all directions are allowed to radially protrude.

In yet another embodiment, the resilient member is formed with a cross-section from circular to polygonal.

In yet another embodiment, the resilient member is formed of several single resilient members assembled into a bundle. Hereby a form of tuning fork is obtained, in which several resilient elements contribute and interact in relation to forming vibrations. In this way, a greater vibration effect is obtained in a simple way.

In one embodiment, the resilient member is designed such that the weight of the material or cross-section thereof is increased in the direction from the end attached to the grating. The weight will mean that a greater vibration effect can be achieved and a longer duration of a vibration cycle before it fades out. This embodiment is not to be construed as limiting the construction of the resilient member. Thus, it is possible to change the cross section or increase the weight at any position of the extension of the resilient element for the purpose of creating vibrations of the desired frequency, duration and energy content for a more efficient cleaning of the grating. In yet another embodiment, the resilient member is provided at any position of the extension of the resilient member with a weight-increasing unit.

In yet another embodiment, the forced mixer is configured with an outlet synchronous with the forced mixer rotation of the vane, acting directly or indirectly as a device that generates oscillatory movements in the form of vibrations. More specifically, the forced mixer is provided with a driving shaft which is passed through the bottom of the forced mixer container and directly in connection with the rotating vane. On a portion of the drive shaft arranged outside the mixer container, this is provided with a wheel formed with at least one recess which, in the same way as a camshaft, is connected to a rod adapted to act as a resilient shock bar in connection with the grating , preferably the lattice for expiration. As an alternative to the wheel, it can e.g. be the mixer square shaft fom acts as camshaft. In one embodiment, the thrust bar is arranged in a liner which holds the thrust bar in position relative to the driving shaft with the wheel and grille, respectively. In one embodiment, the thrust bar is fixedly mounted, possibly. welded directly to the grid. In another embodiment, the grille is suspended resiliently to the mixer container and thrust bar. In yet another embodiment, the thrust bar is provided with a spring which retains the thrust bar in resilient connection in the casing and allows movement of the thrust bar in the longitudinal direction of the casing.

In yet another embodiment, the drive shaft is provided with one or more protruding transverse bars formed outside the container and below it. The crossbar is dimensioned so that when it is moved around it will be able to meet with the outlet grid or the housing with outlet forming the outlet and thus be able to shake or vibrate material free from the grid. To avoid accelerated wear, the unit can be mounted suspended in the mechanical construction. Alternatively, the unit can be built with sacrificial parts that can be easily replaced when worn.

In yet another embodiment, a resilient member is provided for outlet grilles and is designed and arranged in such a way that it can be engaged with the concentric wheel or a cross bar as it moves around.

In the same way as previously described, vibrations will occur when the resilient element collides with the counterpart and is later released and subjected to oscillations.

In yet another embodiment, in order to optimize the vibrations in the grid during the discharge point, in the attachment points, be it machine bolts, screws and the like. carrying carrier for outlet and / or grille for outlet mounted a spring device. In a particular embodiment, the spring device consists of a bolt with a circumferential spring. Because the threaded piece is short in relation to the length of the bolt, the connection between mixing chamber and discharge chamber or safety net in the form of outlet grilles will be suspended resiliently. This means that the safety grille - or the safety arrangement mounted on the individual mixer - can produce more and, if necessary, more powerful vibrations that help the material pass through the safety grille. In a particular embodiment, the bolt is replaced by a threaded rod of suitable length and the head constituting a stop for the spring is replaced with a nut. Hereby the resilient effect can be adjusted so that a suitable resilient suspension of the container / grille can be obtained.

In summary, the mixer is provided with a spring device for resilient suspension of an outlet container and / or an inlet or outlet grille which ensures that the vibrations can propagate freely and help shake grids free of material that could otherwise potentially stop the grating.

An embodiment of the forced mixer according to the invention will now be described in more detail with reference to the accompanying drawings, in which:

FIG. 1 shows a forced mixer; FIG. 2 is a cross-sectional view of a forced mixer; FIG. Fig. 3 shows a bottom plate for an outlet grille opening with resilient elements mounted; 4 is a bottom view of the bottom plate with container for outlet and resilient elements; FIG. 5 shows a container for outlets with resilient elements fitted to grids; FIG. 6 shows a spring device for resilient suspended mounting container for outlet relative to mixer, FIG. 7 shows an embodiment in which the drive shaft of the mixer has a vibration outlet outlet. 8 shows a detail in connection with the transfer of vibrations to the outlet container and FIG. 9 shows the suspension of the container for the outlet and gives an overview of the entire structure.

The FIG. 1, the forced mixer container 2, arranged to receive the raw materials, either through grids constituting the protective cover 3, or through the security lock 4. The forced mixer 1, which is shown to be transportable and provided with wheels 5, and a support foot 6, and a drawbar 7. The finished product is withdrawn at the bottom of the container 2 from a discharge flap (not shown), and thus can be guided directly into a wheelbase for application to the place of application. Conveniently, the discharge flap is also provided with a safety lock 8, which is specially adapted to be mounted thereon.

Furthermore, as shown in FIG. 2 is provided with a movable device 9 which mixes the raw materials and prepares the finished product. Relative to the mixer in Figure 1, the safety lock 8 is removed. Instead, an outlet container 10 is mounted which includes a safety grille in the form of an outlet grate 11. It is noted that safety lock 4 is mounted in a cutout in the safety grate 3 where feed of raw materials can optionally be made through security lock 4 or through the safety grate 3. In one embodiment not shown, the safety lattice 3 may comprise the entire inlet whereby the safety lock 4 is not mounted. Instead, the safety lattice 3 is kept away from the buildup of material by vibration of the present invention.

FIG. 3 shows a base plate 12 for a mixer 1 with opening 13 for insertion of a container 14 for outlet, where outlet grid 11 with resilient elements 15 is mounted. A displaceable closure mechanism forms a discharge flap 16. The discharge flap 16 can thus enclose the materials blended into container 2 for blending raw materials until blending has achieved the structure and homogeneity desired. It is noted that the resilient members 15 rise through base plate 12 when the discharge hatch 16 is open. Firstly, pre-mixed material flows from container 2 for mixing to container 14 for outlet and partly the resilient elements 15 collide with the movable device 9, which forms a rotating vane for mixing material in the container 2 for mixing material. In the collision that occurs when the movable device 9 meets the resilient members 15, these are briefly deformed and when the movable device passes by, the resilient members 15 are released again, leaving these to a pivotal movement which produces vibrations in the outlet lattice 11 to which the resilient members 15 are. attached at one end, where the other end, as seen, is freely suspended.

FIG. 4 shows bottom plate 12 from the other side. This shows container 14 for outlet better where outlet grille 11 is mounted at the bottom. Furthermore, a separating plate 17 is inserted into the container 14. This provides a better stiffness of the container 14. The container 14 is further provided with tabs 18 whereby the container 14 can be mounted on the base plate 12 by means of spring device 19. A detailed drawing fig. 5 shows more detailed container 14 for outlet with resilient elements 15 fitted to grid 11 for outlet. FIG. 6 further shows the spring device 19 for resilient suspended mounting container 14 for outlet on the base plate 12 for mixer 1. In more detail, the spring device 19 constitutes a machine bolt 20 with a head 21 forming a stop for the migration of a spring 24, a body 22 and a thread piece 23, said thread piece 23 being adapted to form a counterpart to a threaded hole made on the base plate 12 (not shown). A spring 24 is mounted in the spring device 19 and thus forms the resilient suspension for container 14 for outlet relative to the base plate 12. Thus, when the resilient elements 15 are manipulated, it is possible to vibrate the entire container 14 with lattice 11 in the resilient suspension with the spring device 19 , thereby preventing expiring material from stopping grid 11 for expiration with the genes it may cause.

Figures 7 to 9 show an alternate embodiment in which the mixer 1 on its drive shaft, during the insertion in the mixer container 2, is provided with an outlet where a rotating rod or thrust bar 25 can generate vibrations to prevent accumulation of material on grid 11 for outlet. Also note the spring assembly 19 for mounting container 14 for outlet made in this version of a threaded rod with a spring and a washer and nut, which allows adjustment of the characteristics of the spring suspension.

Claims (3)

claims: A mixing machine (1) comprising at least one container (2) provided with a device (9) for forcibly mixing raw materials into a finished product, the container (2) having an opening for receiving raw materials, and an opening in in the form of an outlet (13) for passing the finished product out of the container (2), wherein at least one of the aforementioned openings is provided with a safety grid (3, 11) characterized in that the mixing machine (1) is provided with a device which is adapted to generate oscillatory movements in the form of vibrations comprising at least one resilient member (15), said resilient member (15) being secured at one end of the lattice (3, 11) and the other end extending from the safety lattice ( 3, 11) in such a direction that the second and free ends of the resilient element (15) are arranged in an area of the mixer container (2) for mixing materials where it can be met by the mixer device (9) for mixing raw materials . 2. I I Requirement no .: because a meaningful inquiry cannot be done, namely: Mixing machine according to claim 1, characterized in that the resilient element (15) is adapted to deform in a flexible manner when the mixer device (9) for mixing raw materials meets the resilient element (15) and subsequently is released when the device (9). ) for mixing raw materials passes by to swing back to the starting position during the output of an oscillating vibration creating motion. A mixer according to claim 2, Know e t e g n e t by, to expired is provided with one closure System (16), there prevents that material runs out of the mixer container (2) and further provided to to isolate it resilient element (15) away from collision with the raw material mixing device (9) by enclosing the resilient element (15) in an outlet container (14). Mixing machine according to one of claims 1-3, characterized in that the resilient element (15) is formed of at least one piece of resilient flat steel or round steel. Mixer according to one of claims 1 to 4, characterized in that the resilient element (15) is formed with a cross-section from circular to polygonal. Mixing machine according to one of claims 1 to 5, characterized in that the resulting resilient element is formed of several single resilient elements (15) composed of a bundle. Mixer according to one of claims 1 to 6, characterized in that the resilient element (15) is provided with a weight-increasing unit at any position of the extension of the resilient element. Mixing machine according to one of claims 1 to 7, characterized in that the resilient element (15) is designed in relation to length, width and thickness in order to generate vibrations with 5 a frequency and effect that effectively helps the grid (3, 11) to prevent clogging with material. Mixer according to one of claims 1-8, characterized in that The mixing machine (1) is provided with an outlet which is synchronous with the forced mixer rotation of the vane, directly or indirectly acting as a device which generates oscillating movements in the form of vibrations in a safety grid (3, 11) for inlet or outlet. Mixing machine according to one of claims 1-9, characterized in that the mixing machine is provided with a spring device (19) for resilient suspension of a container (14) for outlet. 20 and / or a spring device (19) for resilient suspension of a grid (3, 11) for inlet or outlet. Fig. ₀ 2. Fig. ₀ 3 o IS ir Fig _. 4o PATENT 'AND WAREHOUSE STYLE NEWS INVESTIGATION REPORT - PATENT application number PA 2016 00132 1. 1 1 Non-searchable requirements (see Box # I). 2. 1 1 Inventory unit is missing before the environmental survey (see Box No. II ·!). A. CLASSIFICATION B 01 F 11/00 (2006.01); B 28 C 5/08 (2006.01); B 28 C 7/16 (2006.01) According to International Patent Classification (IPC) B. SURVEY AREA PCT minimum documentation examined (classification system followed by classification symbols) IPC / CPC: B01F, B28C Examined documentation beyond PCT minimum DK, NO, SE, FI: In PC classes as listed above. Electronic databases used (database name and search terms, if any) EPODOC, WPI, FULL TEXT: ENGLISH C. RELEVANT DOCUMENTS Category* Documents cited stating relevant sections Relevant to requirement no. X, Y EP 1669180 A2 (TURBOSOL PRODUZIONE SPA) 2006.06.14, section 0010 0033 and fig. 2, 3. X: 1.2. Y: 3, 10 Y US 2552163 A (FLEISCHMANN) 1951.05.08, claims and figures. 3 Y DE 2236993 Al (SCHLOSSER & CO GMBH) 1974.02.07, pages 4 - 6 and figures. 10 A DE 3107423 Al (KARRENA GMBH) 1982.09.16 1 - 10 A JP 2008194853 A (BIRUDORANDO KK) 2008.08.28 1 - 10 1 1 Additional documents are listed in Continuation of Box C. * Category of quoted documents: A Document representing the prior art (state of the art) without anticipating news or significant separation. D Document cited in the application. E Document that has a submission or priority date that lies ahead the filing date of the processed application, but which is published later than the filing date. L Document that may cast doubt on an alleged priority claim, or which is cited to determine the publication date of another document, or cited for other reasons (as specified). O Document dealing with non-written disclosure, e.g. suits, exhibitions or movies. P Document published in the period between priority and filing date. T Document that does not conflict with the application, but which is cited to understand the basic principle or theory of the invention. X Particularly relevant document; the invention has no novelty or ad- does not differ significantly from prior art when evaluating the document alone. Y Particularly relevant document; the invention does not differ significantly from the prior art, when the document is combined with one or more documents of the same kind and the combination thereof is obvious to the person skilled in the art. Document in the same patent family. Patent and Trademark Office Helgeshøj Allé 81 2630 Taastrup Phone No. +45 4350 8000 Fax No. +45 4350 8001 Date of completion of the news survey September 5, 2016 The news survey is done by Dmitri Burdykin Phone No. +45 4350 8371 Search report NEWS INVESTIGATION REPORT - PATENT application number PA 2016 00132 C (Continued). RELEVANT DOCUMENTS Category* Cited documents stating relevant sections Relevant to requirement no. Search report NEWS INVESTIGATION REPORT - PATENT application number PA 2016 00132 Box # I Non-searchable claims The news survey has not been conducted for the following requirements:! □ Requirement no .: because the content of the claim (s) is not considered to be an invention: 3. □ Requirement no .: of other lands: Box No. II Inventive device missing before the news survey Several inventions have been found in the application: Search report NEWS INVESTIGATION REPORT - PATENT application number PA 2016 00132 SUPPLEMENTARY BOX Continuation of Box No. [.] Search report