MIXING PLANT

Description

[0001] The present invention relates to a mixing plant with a feeder, a staking device, wherein the staking device has holding means and movement means, and interrogation means, wherein the holding means are designed in a maintenance position of the staking device to hold the feeder in a maintenance position and / or to prevent an uncontrolled downward movement of the feeder, wherein the staking device is designed in an operating position of the staking device not to prevent an intended movement of the feeder from an operating position.

[0002] Locking devices for feeders in mixing plants, especially for feeders in mixing plants with a feeder lift, are manually positioned by an operator. The locking device is usually a plug or bolt that can be sensed via an inductive proximity switch. This allows the mixing plant to detect whether the locking device is present or not, and moving the feeder can be prevented to avoid damage. Beforehand, the feeder is moved to a maintenance position, guided by the mixing plant's dosing and process control system. In this position, the feeder can then be locked, i.e., secured, using the locking device.

[0003] To enable the feeder to operate again under the control of the dosing and process control system, the operator manually removes the locking device. The locking device can also be only partially removed due to an operating error, so that the inductive proximity switch no longer detects the locking device, but the feeder's travel path is still blocked. In this case, there is a possibility that, for example, the feeder's trolley rollers could hit the locking device, causing damage to the mixing plant. This procedure is also possible for ground-level mixing plants where the elevator track does not end in a pit, by querying the operating position.

[0004] A generic mixing system according to the preamble of claim 1 is known from CN 112606204A. Against this background, the present invention is based on the object of providing an improved staking device.

[0005] This object is achieved by the subject matter having the features of independent claim 1. Advantageous developments of the invention are the subject matter of the dependent claims.

[0006] Accordingly, the invention provides that the movement means are designed to move the staking device automatically into the maintenance position or into the operating position, wherein the query means are designed to determine the position of the staking device and / or the position of the feeder.

[0007] According to the invention, it is provided that the feeder has a roller and the holding means have or are a locking plate, preferably partially adapted to the radius of the roller, which is rotatably mounted on the mixing plant.

[0008] It is conceivable that the movement means comprise or are a pneumatic cylinder, wherein the pneumatic cylinder is articulated to the holding means and to receptacles of the mixing plant, wherein the pneumatic cylinder does not absorb part or all of the weight of the feeder in any operating state of the mixing plant.

[0009] It can be provided that the locking device has several locking plates and / or pneumatic cylinders.

[0010] Preferably, the movement means are articulated to the holding means and / or to the receptacles of the mixing plant by means of vibration-damping receptacles.

[0011] It is conceivable that the mixing plant has a protective door, wherein the protective door allows access to the feeder, wherein means are provided which are designed such that the protective door can be opened when the query means detect a maintenance position and / or maintenance position.

[0012] It can be provided that the mixing system has means, preferably a button and a control, which are designed to control the movement of the staking device between the maintenance position and the operating position.

[0013] It may also be provided that there is more than one maintenance position.

[0014] It can therefore be provided that the staking device is at least partially movable with the feeder.

[0015] It is conceivable that the query means are designed redundantly.

[0016] It is preferably provided that the mixing plant has an elevator track, wherein the elevator track is preferably located partially in a pit.

[0017] It is conceivable that the mixing plant is a stationary or mobile concrete mixing plant and / or has means designed to enable a truck mixer to be loaded with concrete.

[0018] The feeder can then be moved into the maintenance position, guided by the mixing plant's dosing and process control system. The locking device can then be moved into the maintenance position, guided by the mixing plant's dosing and process control system.

[0019] The maintenance position and setting is preferably triggered by the dosing control via the push of a button.

[0020] The pneumatic cylinder preferably moves the locking plate to the maintenance position and is monitored. When the locking plate reaches its end position and the feeder hopper is correctly positioned, the control system preferably releases the protective grille door.

[0021] The operating position and setting is preferably triggered by the dosing control via the push of a button.

[0022] After closing the protective grille door, the feeder can preferably move upwards and automatic operation is resumed after the pneumatic cylinder has moved the locking plate into the operating position and has been queried.

[0023] In the event of a rope break, the load of the feeder would preferably be transferred into the elevator track and would preferably not be absorbed by the pneumatic cylinders.

[0024] By querying the positions and positions, a safe state is preferably possible without possible damage to the components.

[0025] The maintenance position is preferably possible in all installation situations. Safe access to the elevator track in accordance with the requirements of the risk assessment is preferably possible, even if the feeder bucket is not in its lower end position.

[0026] In an embodiment not corresponding to the claimed invention, it can be provided that the staking device moves along with the feeder, and the mixing system, in particular the guide rail and the elevator track, are designed in such a way that several maintenance positions are possible. The mixing system according to the invention advantageously significantly reduces the risk of accidents. Likewise, a solution for all installation situations is preferably provided.

[0027] The feeder can be designed as a feeder bucket.

[0028] The feeder bucket is preferably secured in a process-controlled manner. A redundant query of the safe locking position is preferably possible. A safe signal for releasing the access door to the feeder is preferably provided. The locking plate preferably has a special, rounded shape that matches the radius of the rollers. This preferably enables a low-wear setting process when checking the slack rope circuit of the feeder elevator.

[0029] The pneumatic cylinder is preferably used only to swing the locking plate in and out into the operating or maintenance position and is therefore preferably never subject to vibrations caused by the feeder bucket moving upwards.

[0030] It is preferable to provide additional vibration damping through a specially lined mounting bore for the pneumatic cylinder.

[0031] Preferably, optimized accessibility and compliance with the system dimensions are enabled.

[0032] It should be noted here that the terms "a" and "an" do not necessarily refer to exactly one of the elements, although this represents a possible embodiment, but can also refer to a plurality of the elements. Likewise, the use of the plural also includes the presence of the element in question in the singular, and conversely, the singular also encompasses several of the elements in question. Furthermore, all features of the invention described herein can be combined with one another as desired or claimed in isolation from one another.

[0033] Further advantages, features, and effects of the present invention will become apparent from the following description of preferred embodiments with reference to the figures, in which identical or similar components are designated by the same reference numerals. Herein: Fig. 1: a side view of an embodiment of a mixing system according to the invention with a staking device in the maintenance position. Fig. 2: a top view of an embodiment of a mixing system according to the invention. Fig. 3: a detail of the side view of an embodiment of a mixing system according to the invention with a staking device in the maintenance position. Fig. 4: a detail of the side view of an embodiment of a mixing system according to the invention with a staking device in the operating position.

[0034] In Fig. 1 A portion of the elevator track 1 and the guide rail 3 of a mixing plant according to the invention is shown. The feeder 7 has a roller 2 that can run in the guide rail 3 and thus guides the feeder 7 during its movement.

[0035] The locking plate 4 of the locking device is in the maintenance position and prevents the feeder 7, which is in the maintenance position, from falling or moving downwards by blocking the roller 2.

[0036] The position of the feeder 7 is queried via a feeder position switch 8 and the position of the locking plate 4 is queried via a locking plate position switch 9.

[0037] Fig. 2 shows the elevator track 1, the guide rail 3, and the feeder 7 in a top view. This shows that there are two guide rails and two rollers.

[0038] Fig. 3 shows that in Fig. 1 drawn detail Z. The locking plate 4 or the locking device is in maintenance position.

[0039] The feeder is safely stopped when the locking plate 4 or the locking device is in the maintenance position.

[0040] The locking plate 4 is hinged to a corresponding holder of the mixing plant by a pivot bearing 5.

[0041] The pneumatic cylinder 6 is hinged to the locking plate 4 and to a corresponding holder of the mixing system.

[0042] This results in a kinematics in which the locking plate 4 is rotated when the pneumatic cylinder 6 extends or retracts.

[0043] The locking plate position switch 9 signals when the locking plate is in the maintenance position.

[0044] Fig. 4 shows that in Fig. 1Detail Z is shown. The locking plate 4 or the locking device is in the operating position. The locking plate 4 releases the roller 2.

Claims

1. Mixing plant with a feeder (7), an unplugging device, wherein the unplugging device has holding means and movement means, and interrogation means, wherein the holding means in a maintenance orientation of the unplugging device are configured to hold the feeder (7) in a maintenance position and / or to prevent an uncontrolled movement of the feeder (7) downwards, wherein the unplugging device in an operating orientation of the unplugging device is configured not to prevent an intended movement of the feeder (7) from an operating position, wherein the movement means are configured to move the unplugging device automatically into the maintenance orientation or into the operating orientation, wherein the interrogation means are configured to determine the orientation of the unplugging device and / or the position of the feeder (7), characterised in that the feeder (7) has a roller (2) and the holding means have or are a securing plate (4), which is preferably partially adapted to the radius of the roller and which is mounted rotatably on the mixing plant, wherein the securing plate (4) in the maintenance orientation, by way of the blocking of the roller (2), prevents the feeder (7) from dropping or moving down when the latter is in the maintenance position.

2. Mixing plant according to claim 1, characterised in that the movement means have or are a pneumatic cylinder (6), wherein the pneumatic cylinder (6) is articulated to the holding means and to receptacles of the mixing plant, wherein the pneumatic cylinder (6) does not, in any operating state of the mixing plant, absorb a part of or the entire weight force of the feeder (7).

3. Mixing plant according to any one of the preceding claims, characterised in that the movement means are articulated to the holding means and / or to the receptacles of the mixing plant by means of vibration-damping receptacles.

4. Mixing plant according to any one of the preceding claims, characterised in that the mixing plant has a protective door, wherein the protective door allows access to the feeder (7), wherein means are provided which are configured such that the protective door can be opened when the interrogation means determine a maintenance orientation and / or maintenance position.

5. Mixing plant according to any one of the preceding claims, characterised in that the mixing plant has means, preferably a button and a controller, which are configured to control the movement of the unplugging device between the maintenance orientation and the operating orientation.

6. Mixing plant according to any one of the preceding claims, characterised in that more than one maintenance orientation is provided.

7. Mixing plant according to any one of the preceding claims, characterised in that the interrogation means are configured redundantly.

8. Mixing plant according to any one of the preceding claims, characterised in that the mixing plant has a lift track, wherein the lift track is preferably located in part in a pit.

9. Mixing plant according to any one of the preceding claims, characterised in that the mixing plant is a stationary or mobile concrete mixing plant and / or has means that are configured so as to allow a truck mixer to be loaded with concrete.