ES2442618B1 - Vibrating piston pump - Google Patents

Abstract

Vibrating piston pump. # It has a magnetic core (2) extended in a piston (21) that protrudes from one end of a cavity (3) and is housed in a compression chamber (4) equipped with an outlet (41 ) front for the exit of the liquid driven by a piston of a side inlet (42) for the access of the liquid to be propelled, said chamber (4) being separated from the cavity (3) by a disk (5) provided with a hole for the passage of said piston (21) and by means of sealing (6), which establish around the piston (21) a closure to prevent the passage of the liquid to be propelled from the compression chamber (4) into the cavity (3 ), said chamber (4) being isolated from the magnetic system (1) of the pump. It comprises a first and a second non-return valve (7, 8) arranged at the outlet (41) and at the inlet (42) of the compression chamber liquid (4). The piston (21) is of magnetic material over-molded in plastic and can also comprise an overmolded membrane (22).

Description

DESCRIPTION

Vibrating piston pump.

Object of the invention. 5

The present invention relates to a vibrating piston pump suitable for displacing liquids, comprising a piston alternately actuated by a magnetic system and which drives the liquid in a compression chamber towards an outlet. The vibrating pump object of this invention has characteristics oriented to isolate the compression chamber from the magnetic system, avoiding the passage of the liquid through the magnetic system.

State of the art

At present, different pressure pumps used to move liquids from one point to another are known, mention being made, for example, of gear, centrifugal, vane, vibratory, etc. pumps.

The choice of one type or another of the pump depends fundamentally on the requirements that must be met such as: dimensions / weight, maximum pressure, maximum flow, flow at working pressure, power consumed, characteristics of the fluid to be moved (oils, acids, food, etc.), price or level of rumorosity. twenty

The vibrating piston pumps, which are of the type referred to in the present invention, have an operation based on circulating the liquid through its magnetic system, which, with a valve system and by the principle of areas of push, move different water flows between two points at different pressures. 25

This passage of liquid through the magnetic system introduces in the manufacture of this type of pumps a series of requirements that give it complexity, and which are mainly determined by the need to use materials with mechanical / magnetic properties compatible with the liquid to be propelled and with food standards. 30

Another important limitation of the current vibratory pumps is that as the liquid must pass through the inside of the piston, the inlet area being limited to the free area existing within the vibrating magnetic system and, consequently, the pump flow rate is also limited to this area.

 35

Therefore, the technical problem that arises is the development of a vibrating pump provided with characteristics that facilitate its manufacture, reduce its costs and do not present current flow limitations. In addition to providing advantages of use and dimensions that allow the use of more efficient and economical materials, prohibited in existing vibration pumps due precisely to the passage of liquid through the magnetic system. 40

Description of the invention

The vibrating piston pump object of this invention, being of the type of the aforementioned has some characteristics, according to claim 1 that allow solving the problem described above and provide a series of advantages of both use and manufacturing.

A first feature of the invention is that it comprises a sealed, or isolated, pressure chamber in relation to the magnetic drive system of the pump, thereby avoiding the constructive complexity of having to use materials with mechanical / magnetic properties compatible with water. and with food standards 50.

A second characteristic of the vibrating pump of the invention is the use of a rear electromagnet, which significantly increases the efficiency of the magnetic system and, consequently, the attractive force of the magnetic core, resulting in a reduction in the cost of the pump as well as of its dimensions for the same 55 benefits.

A third feature of the invention is the use of a magnetic core / iron piston over-molded in plastic that allows to reduce pump costs, also for the same performance.

 60

The vibrating pump object of this invention allows working with different liquids, for example drinking or non-potable water.

Another advantage of the pump of the invention is that it can work interchangeably with hot or cold liquid and food products, without risk of contamination. This vibrating pump has dimensions and 65

Reduced weight compared to current pumps and is usable both domestically and industrially due to a low noise level during operation.

With the characteristics set forth in the claims, both the size of the compression chamber and the inlet and the liquid outlet are independent of the magnetic system, the flow rate being limited only 5 by the power of said magnetic system, which can be increased or reduced. said power independently of the compression chamber. Another of the advantages of the vibrating piston pump object of the invention is that it has a lower cost than conventional piston vibrating pumps since the insulated compression chamber is found or is sealed with respect to the magnetic system and does not pass the liquid to through said magnetic system, the magnetic core can be of any material with magnetic properties and does not need to be of a stainless or food grade material. The situation is the same for the compression and counterpressure springs of the magnetic core or the guide body thereof.

This vibrating piston pump of the invention provides other advantages, such as the possibility of obtaining higher flow rates for the same working pressure and with the same electrical power providing a better use of energy.

These and other features of the invention will be more readily understood in view of the exemplary embodiment shown in the attached figures.

 twenty

Description of the figures.

To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings is attached to the present specification in which, for illustrative and non-limiting purposes, the following has been represented: 25

- Figure 1 shows a schematic elevation view of an embodiment of the vibrating piston pump according to the invention, sectioned by a vertical plane and suitable for working at high pressure;

- Figure 2 shows a schematic elevation view of a variant embodiment of the vibrating pump with 30 piston according to the invention, sectioned by a vertical plane with the electromagnet of the magnetic system in the rear area of the pump and with a piston made of a magnetic material over-molded in plastic;

- Figure 3 shows a detail of a variant embodiment of the vibrating piston pump of the previous figure, suitable for high flow jobs; and 35

- Figure 4 shows a detail of a variant embodiment of the vibrating pump of Figure 1, suitable for silent work.

Preferred embodiment of the invention. 40

In the exemplary embodiment shown in Figure 1, the vibrating piston pump comprises a magnetic system (1), with an electromagnet in lateral arrangement, suitable for moving in a longitudinal direction and in an alternate direction a magnetic core (2) inside a cavity (3).

 Four. Five

The magnetic core (2) is extended in a piston (21) protruding from one end of the cavity (3) and is housed in a compression chamber (4) provided with a front outlet (41) for the exit of the liquid driven by the piston (21) and a side inlet (42) for the access of the liquid to be driven.

Said compression chamber (4) is separated from the cavity (3), by a disk (5) provided with a hole 50 for the passage of said piston (21) and by sealing means (6), represented by O-rings, which establish around the said piston (21) a suitable closure to prevent the passage of the liquid to be propelled from the compression chamber (4) into the cavity (3), so that said compression chamber (4) is It is isolated from the magnetic system (1) of the pump.

 55

In the example shown in figure 1, the pump has a first and a second non-return valve (7, 8) at the outlet (41) and at the liquid inlet (42) of the compression chamber (4), and suitable for pump work at high pressures.

In the variant embodiment shown in Figure 2, the pump has a magnetic system (1) with 60 electromagnet in the rear position, and with a piston (21) made of a magnetic material over-molded in plastic

In the variant embodiment shown in Figure 3, the compression chamber (4) does not have a second non-return valve (8) at the inlet (42), incorporating only the first non-return valve (7) at the outlet 65

(41); resulting in this configuration suitable for the work of the pump with high flow of liquid.

In the embodiments shown in Figure 1 the magnetic core (2) is mounted between a main spring (91) and a counter-pressure spring (92).

 5

In the variant embodiment shown in Figure 4, the pump is designed to work silently using, in this case, a piston (21) with an overmoulded membrane (22).

Unlike the previous examples, in this case the pump does not require a counterpressure spring (92), nor the use of a stainless steel piston or other quality material for food use. 10

Once the nature of the invention has been sufficiently described, as well as a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the described elements may be modified, provided that this does not imply an alteration. of the essential features of the invention that are claimed below. fifteen

Claims (5)

1.- Vibrating piston pump applicable in the movement of liquids; comprising a magnetic system (1), with rear or side electromagnet, suitable for moving in a longitudinal direction and in an alternate direction a magnetic core (2) inside a cavity (3), characterized in that: the magnetic core (2) is 5 prolonged in a piston (21) that protrudes through one of the ends of the cavity (3) and is housed in a compression chamber (4) provided with a front outlet (41) for the exit of the liquid driven by a piston of a lateral inlet (42) for the access of the liquid to be propelled and because said compression chamber (4) is separated from the cavity (3) by a disk (5) provided with a hole for the passage of said piston (21) and by sealing means (6), which establish around the piston (21) a suitable closure to prevent the passage of the liquid to be propelled from the compression chamber (4) into the cavity (3), so that said chamber of compression (4) is isolated from the magn system acid (1) of the pump. 2. Pump according to claim 1, characterized in that it comprises a first and a second non-return valve (7, 8) arranged at the outlet (41) and at the inlet (42) of the compression chamber liquid (4) and 15 suitable for pump work at high pressures. 3. Pump according to claim 1, characterized in that it has a first non-return valve (7) at the liquid outlet (41) of the compression chamber (4), suitable for the work of the pump with high liquid flow . twenty 4. Pump according to claim 1, characterized in that the piston (21) is made of a magnetic material over-molded in plastic 5. Pump according to claim 1, characterized in that the piston (21) comprises an overmoulded diaphragm (22), suitable for the silent pump operation.