CN102619733A - Peristaltic pump - Google Patents

Abstract

The invention relates to a hose pump (10) comprising a pump housing (12) receiving a drive motor and a pump head (14) having a deformable body (16) drivable by said drive motor and A pump hose (18) supported on the pump housing (12), wherein the pump hose (18) is mechanically deformed by the deformation body (16) during operation of the hose pump so that The conveyed medium is moved through the pump hose (18), wherein the pump head (14) is detachably fastened to the pump housing (12) by means of an in particular manually actuatable snap-lock (44). ), the pump hose (18) is increasingly pressurized via the deformation body (16) when the quick locking mechanism is shifted from its unlocked position into its locked position.

Description

hose pump

technical field

The invention relates to a hose pump comprising a pump housing receiving a drive motor and a pump head having a deformable body drivable by the drive motor and a pump hose supported on the pump housing, wherein the pump During operation of the hose pump, the hose is mechanically deformed by the deformation body in order to move the medium to be conveyed through the pump hose.

Background technique

Such hose pumps are known in various designs from the prior art. They are particularly suitable for delivery of thin liquid dispersion paints, latex paints, water-reducible primers, lacquers, oils and water-based wood preservatives. Therefore, they are often installed in paint application devices called motorized paint rollers. Furthermore, hose pumps are advantageous due to their simple and cost-effective construction, their low maintenance effort and their uniform and relatively shock-free delivery properties.

For long-lasting and trouble-free operation it is important that the parts of the hose pump involved in the paint delivery be thoroughly cleaned after use. Cleaning processes are known in which the suction line of the pump is immersed in a container filled with tap water, so that the parts involved in the paint delivery are rinsed with the tap water drawn from the container while the pump is running. However, this cleaning process is disadvantageous because paint residues cannot be completely rinsed off due to the low delivery pressure of the pump even with an increase in the pump speed.

In another known cleaning process, the suction line of the pump is connected to a high-pressure water line. Here, a valve closes the supply circuit via a bypass and flushes paint residues out of the pressure line of the hose pump. The disadvantage is that the pump hose running through the high-pressure pump is only insufficiently cleaned. In addition, the parts of the valve must be cleaned.

Contents of the invention

Proceeding from the prior art, the object of the present invention is to provide a hose pump of the type mentioned at the outset, in which all parts of the pump involved in conveying the paint, including the pump hose passing through the pump, are thoroughly subjected to cleaning process. Furthermore, the components involved in the paint delivery should be easily replaceable.

In order to solve this task, the present invention creates a hose pump of the type mentioned at the outset, which is characterized in that the pump head is detachably fastened to the pump housing by means of an especially manually operable quick-lock mechanism, In this case, the pump hose is increasingly pressurized by the deformation body when the quick-release locking mechanism is transferred from its unlocked position into its locked position.

The construction is characterized in that two cleaning variants of the components involved in the paint delivery can be realized independently of the degree of contamination. In a first variant, the hose pump is connected to the external high-pressure water line, so that after the quick-release locking mechanism has been transferred from the locked position into the unlocked position, the parts involved in the paint delivery can be cleaned by the flushing medium. Since the pump hose is not pressurized by the deformation body in the unlocked position, the pump hose can be cleaned well. Alternatively, the pump head can also be completely disassembled and the pump hose can be removed from the pump head after the quick-release locking mechanism has been actuated. Accordingly, the pump hose can also be carefully cleaned or completely replaced.

According to a first variant of the invention, the quick locking mechanism has at least one locking lever which is pivotably arranged on the pump housing and locks the pump head in its locking position. Such a locking lever is particularly advantageous since it can be easily actuated manually.

In its locked position, the locking lever preferably cooperates with at least one stop defined on the pump head, whereby a simple construction is achieved.

According to a further variant of the invention, the quick-release locking mechanism has a rotatably arranged eccentric, which is movable between a locking position and an unlocking position and locks the pump head in its locking position. This variant can be particularly advantageous when the locking and unlocking process is to be carried out automatically, ie with the aid of a motor.

Preferably, the pump head is fastened to the pump housing via at least one stop and/or via at least one guide.

According to an embodiment of the present invention, a parallel-extending guide is provided on the pump housing, said guide receiving the pump head reciprocally in one direction of movement, wherein the pump housing is provided with a upper stop that limits said reciprocating motion. Correspondingly, there remains only one degree of freedom with regard to the movement of the pump head, which free end can be optionally locked or released for mounting or dismounting the pump head by means of the quick clamping mechanism according to the invention.

Advantageously, a safety switch is provided which is designed and arranged in such a way that it is activated when the pump head is removed and deactivated when the pump head is installed. Accordingly, it can be ensured that the pump cannot be operated with the pump head removed, in order to protect the user from unnecessary danger in this way.

According to one refinement of the invention, the safety switch is integrated in a manually removable stop which is arranged in such a way that it must be removed to remove the pump head. Accordingly, the pump head cannot be disassembled without actuating the safety switch.

Advantageously, at least one guide is formed in the interior of the pump head to receive the pump hose in a clamped manner, which guide guides the pump hose inside the pump head in a positive manner. On the one hand, the proper arrangement of the pump hoses can be ensured in this way. On the other hand, the pump hose can be detached together with the pump head.

Preferably, a suction line on the one hand and a pressure line on the other hand are fastened via corresponding coupling elements to the pump hose. This is particularly advantageous since the pump hose, which is subject to the greatest mechanical load and thus the greatest wear due to the deformation bodies acting on it, can be replaced separately. Furthermore, suction lines, pressure lines and pump hoses can be produced from different materials. In particular, the material requirements for pump hoses are often different from those for suction and pressure lines.

According to an embodiment of the invention, a control device, in particular in the form of a remote control device, is provided for regulating the rotational speed of the drive motor and thus the volume flow delivered by the hose pump, whereby control of the soft Simple operation of the tube pump.

Description of drawings

Further advantages and features of the invention will become apparent from the following description of a hose pump according to an embodiment of the invention with reference to the drawings. in:

1 is a perspective view of a hose pump with a closed quick-lock mechanism according to an embodiment of the invention;

Figure 2 is a perspective view of the hose pump shown in Figure 1 with the quick lock mechanism open;

Figure 3 is a perspective view of the hose pump with the pump head removed; and

Figure 4 is a bottom view of the pump head.

Detailed ways

FIGS. 1 to 4 show a hose pump 10 according to an embodiment of the invention, which can be used, for example, as a conveying device for a paint application device, also commonly referred to as an electric paint roller, in order to convey especially weak liquids. Dispersion paints, latex paints, water-dilutable primers, lacquers, oil and water-based wood preservatives. The hose pump 10 comprises a pump housing 12 which receives a drive motor, not shown in detail, and a pump head 14 arranged on the pump housing, which has a deformation body 16 in the form of a pressure roller which can be driven by the drive motor and a pump hose 18 which is supported on the pump housing 12 and which is mechanically deformed by the deformation body 16 during operation of the hose pump in order to move the medium to be conveyed through the pump hose 18 . A suction line 22 on the one hand and a pressure line 24 on the other hand are fastened to the pump hose 18 via corresponding coupling elements 20 . The suction line 22 is immersed, for example, into a paint storage container during operation of the hose pump 10 , while the pressure line 24 is connected to a paint application device. The paint application device can, for example, have a paint distributor which distributes the paint delivered via the pressure line 24 evenly to the paint rollers.

The pump head 14 is driven directly via the motor shaft of the drive motor or via an interposed transmission. The drive motor can here optionally be driven via the AC mains or also without cables via a battery (not shown in detail). The pump head 14 includes a rotating carrier 26 , which mounts the deformation body 16 in a freely rotatable manner on a bearing 28 . The pump hose 18 is supported on a partial region of the inner wall 30 of the pump head housing 32 and is guided by two substantially groove-shaped guides 34 inside the pump head housing 32 . The pump hose 18 is made of a highly flexible and wear-resistant plastic which is able to cope with the loads acting on the pump hose 18 .

Along opposite edges of the upper side of the pump housing 12 are formed guides 36 extending parallel to each other with an L-shaped cross-section, which are each interrupted in a central region by a free space 38 . These guides 36 receive correspondingly formed projections 40 in the lower region of the pump head 14 and protrude upwards, so that the pump head 14 is reciprocatably positioned in the direction of movement X on the pump housing 12 . Furthermore, a stop 42 formed on the pump housing 12 and protruding upwards is provided, which limits the reciprocating movement.

In order to finally fix the pump head 14 received in the guide 36 and resting on the stop 42 on the pump housing 12, a quick locking mechanism 44 is provided, which is currently operated by means of a locking lever. 46 and a stop 48 constitute. The locking lever 46 is held on the pump housing 12 so as to be pivotable about a pivot axis 52 on a bearing body 50 which is fixedly connected to the housing 12 . A stop 48 is formed on the upper side of the pump head 14 and defines the locked position of the locking lever 46 .

A further stop 54 , which can be inserted via two cylindrical pins (not shown in detail) into corresponding holes 56 provided on the upper side of the pump housing 12 and can be removed manually, is provided in this way , so that it must be removed for pump head 14 disassembly. The stop 54 is coupled to a safety switch (not shown in detail), which is deactivated when the stop 54 is installed and activated when the stop 54 is removed. Accordingly, the pump can only be operated when the stop 54 is arranged in the pump housing 12 .

The basic functions of the hose pump 10 are known from the prior art and therefore will not be described in detail below. The rotational speed of the drive motor and thus the volume flow delivered by the hose pump 10 is controlled via a remote control device (not shown in detail) in order to ensure simple operation of the hose pump 10 .

In order to clean the parts of the hose pump 10 involved in the paint delivery, namely the pump hose 18 , the suction line 22 and the pressure line 24 , the locking lever 46 is moved from the position shown in FIG. 1 by pivoting about the pivot axis 52 . The position shifts into its unlocked position shown in FIG. 2 , in which the locking lever secures the pump head 14 in an operating position in which the pump hose 18 is pressurized via the deformation body 16 . When the locking lever 46 is shifted from its locked position into the unlocked position, the pressure line 24 is relieved, whereby the pump housing 12 is automatically moved in the direction of the stop 54 . During this movement, the deformation body 16 disengages from the pump hose 14 , so that the pump hose is no longer pressurized. The suction line 22 or the pressure line 24 can now be connected to an external high-pressure water line, so that paint residues can be flushed out of the pump hose 18 , the suction line 22 and the pressure line 24 .

If the pump hose 18 is heavily soiled or damaged during operation, it can be disassembled without any problems. For this purpose, starting from the arrangement shown in FIG. 2 , the stop 54 is removed from the pump housing 12 in a first step. The pump body 16 can then be moved further in the direction of the bearing body 50 until the projection 40 of the pump head 14 disengages from the guide 36 formed on the pump housing 12 . The pump head 14 can now be lifted off the pump housing 12 . In a further step, the pump hose 18 can now be removed from the guide 34 arranged in the pump head 14 and separated from the suction line 22 and the pressure line 24 . The pump hose 18 can then be cleaned or replaced without any problems.

A safety switch (not shown in detail) that is activated when the stop 54 is removed ensures that the hose pump 10 cannot be operated when the pump head 14 is removed. This greatly reduces the risk of injury to the user.

According to an alternative embodiment of the invention not shown in detail at the moment, the quick locking mechanism is formed not by the locking lever, but by an eccentric arranged on the upper side of the pump housing 12, which can be positioned at It moves between a locking position and an unlocking position and locks the pump head in its locking position similarly to the locking lever. The safety switch can also be arranged on the eccentric in such a way that the current circuit for the pump is interrupted after the eccentric has been rotated by a certain angular value before reaching the unlocked position.

Claims (11)

1. peristaltic pump (10); Comprise that one receives the pump case (12) and a pump head (14) of drive motor; Said pump head has deformable body (16) that can be through drive motor and is supported on the pump hose (18) on the said pump case (12); Wherein, said pump hose (18) mechanically is out of shape by said deformable body (16) at the peristaltic pump run duration, so that the medium motion that will carry passes said pump hose (18); It is characterized in that; Said pump head (14) especially can removably be fixed on the said pump case (12) by manually operated quick locking mechanism (44) through one, wherein, is increased the ground on-load pressure at said quick locking mechanism said pump hose (18) when its unlocked position is transferred to its locked position through said deformable body (16).

2. peristaltic pump according to claim 1 (10); It is characterized in that; Said quick locking mechanism (44) has at least one locking lever (46), and said locking lever is arranged on said pump case (12) swingably and goes up and in its locked position, said pump head (14) is locked on the said pump case (12).

3. peristaltic pump according to claim 2 (10) is characterized in that, said locking lever (46) is gone up backstop (48) mating reaction that limits with at least one at said pump head (14) in its locked position.

4. peristaltic pump according to claim 1 (10); It is characterized in that; Said quick locking mechanism (44) has the eccentric part that rotatably is provided with, and said eccentric part can and be locked in said pump head (14) on the said pump case (12) in its locked position in motion between locked position and the unlocked position.

5. according to each described peristaltic pump (10) in the above claim, it is characterized in that said pump head (14) is fixed on the said pump case (12) through at least one backstop (42) and/or through at least one guiding element (36).

6. peristaltic pump according to claim 4 (10); It is characterized in that; On said pump case (12), be provided with the guiding element (36) that extends in parallel; But said guiding element to-and-fro motion ground on a movement direction receives said pump head (14), and on said pump case (12), is provided with and limits said reciprocating backstop (42) in one direction.

7. according to each described peristaltic pump (10) in the above claim; It is characterized in that; Be provided with safety switch; Said safety switch is by configured and disposed in this wise, make said safety switch be activated under the situation that said pump head (14) is disassembled and under the situation that said pump head (14) is mounted by deexcitation.

8. peristaltic pump according to claim 7 (10) is characterized in that, said safety switch is integrated in the backstop (54) that can manually remove, and this backstop that can manually remove is provided with in this wise, makes it must be removed for the dismounting of said pump head (14).

9. according to each described peristaltic pump (10) in the above claim, it is characterized in that, in the inside of said pump head (14), be configured with at least one and clamp the guiding device (34) that ground receives said pump hose (18).

10. according to each described peristaltic pump (10) in the above claim, it is characterized in that, go up through corresponding coupling element (20) one side fixedly aspiration (22) and fixation pressure pipeline (24) on the other hand at said pump hose (18).

11. according to each described peristaltic pump (10) in the above claim; It is characterized in that, be provided with the control gear, the especially control gear of long-distance operating device form that are used to regulate the drive motor rotating speed and regulate the volume flowrate of being carried thus by said peristaltic pump (10).

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