KR20150048213A - Four-valve high pressure pump - Google Patents

Abstract

Valve 4 includes a pump portion 3 with a piston 6 which is normally movable within the cylinder 9 and a drive 2. The high- Two cylinder blocks 10 and 11 are arranged on the end of the cylinder 9, and the transition channels 12 and 13 are formed through the cylinder. An inlet 24 for the medium to be pumped is provided above the inlet housing portion 17. A medium channel 22 in communication with the inlet 24 extends through the inlet housing portion 17 and a non-return valve 25, 26 is arranged on one side of the inlet 24 opening, At the end of the cylinder block 10, 11 communicates with the interior of the cylinder 9 through the channels 12, 13. Similarly, the outlet housing portion 18 is constructed, which has an outlet 27 for the medium to be pumped, instead of the inlet 24. The inlet housing part 17 and / or the outlet housing part 18 are releasably secured to the cylinder blocks 10, 11 in one plane so that they can be removed without further disassembly of the pump part 3. This allows the 4-valve high-pressure pump to be disassembled into smaller, lighter units for transport. Also, the non-return valves 25, 26, 28, 29 can thereby be operated more easily.

Description

A four-valve high pressure pump {FOUR-VALVE HIGH PRESSURE PUMP}

The present invention relates to a four-valve high-pressure pump, which comprises:

a) includes a drive;

b) a pump section, said pump section (3) comprising:

ba) cylinder;

bb) two cylinder blocks arranged on the end faces of the cylinder and each extending a transition channel, said transition channels opening into the outer surface of the cylinder block at the end opposite to each other, In communication with the interior of the cylinder;

c) an inlet housing portion, said inlet housing portion comprising:

ca) inlet and each non-return valve is arranged on two faces above the opening point of the inlet and communicates with each side of the cylinder block at the opposite end A media channel to which the data is to be transmitted;

d) an outlet housing portion, the outlet housing portion comprising:

da) an outlet for the medium to be pumped;

return valve communicating with each of the transition channels of the cylinder block at an end opposite each other, the non-return valve being arranged on two sides above the opening point of the outlet;

and e) a piston which is movable back and forth in the cylinder and is driven to communicate with the drive.

This type of high pressure pump is currently widely used in media applications, particularly in the automotive industry. Accordingly, such a high-pressure pump is used to provide a PVC material as a car bottom sealant or wax, for example for body protection. Also, the adhesive is treated with this type of pump. However, the 4-valve high-pressure pump is not only suitable for liquid applications, but also for applications outside of materials and outside the automotive industry.

In a known four-valve high pressure pump of the type mentioned above, two cylinder blocks cover the inlet housing portion and the outlet housing portion radially with respect to the axis of the cylinder. The different parts are braced together by a tie rod passing axially parallel through the cylinder block.

However, this design has some disadvantages. Pumps constructed in this way are very heavy and therefore complicated to handle and especially difficult to transport. Moreover, in order to maintain the different valves contained within the inlet housing portion and the outlet housing portion, the pump must be substantially disassembled and therefore time consuming.

An object of the present invention is to make it easier to transport a 4-valve high-pressure pump of the above-mentioned type and to facilitate the maintenance of the valve.

This object is achieved according to the following features of the invention,

f) the inlet housing part and / or the outlet housing part are releasably fastened laterally on the cylinder block so that they can be removed without further decomposition of the pump part.

According to the present invention, it is recognized that the above-mentioned disadvantages occur in axial bracing of the cylinder block, the inlet housing portion and the outlet housing portion. The present invention therefore relates to the use of certain fastening means for fastening the inlet housing part and / or the outlet housing part to the cylinder block from the side, for example with the help of a plain screw, It replaces axial bracing. Here, tightening of the different components occurs in the radial direction with respect to the axis of the cylinder. The cylinder block no longer radially covers the inlet housing portion and / or the outlet housing portion. Thus, the inlet housing portion and / or the outlet housing portion, whether implementing the access to the valve for valve maintenance or implementing a plurality of lightweight portions for transport, Lt; / RTI >

According to a particularly preferred embodiment of the invention, the inlet housing part and / or the outlet housing part are pivotable about an axis extending perpendicular to the axis of the cylinder after part of the fixing means has been released. In some cases, it is not necessary to completely remove the inlet housing portion or the outlet housing portion from the remaining pump portion to implement access to the valve. It is sufficient to pivot until the valve is accessible.

This approach is preferred because the media channel of the inlet housing portion and / or the medium channel of the outlet housing portion can be enclosed by a plug and have at least one opening reaching the outlet surface. Facilitated according to the embodiment. When the plug is removed, the non-return valve of the medium channel can be reached by the opening.

Representative embodiments of the invention are described in more detail below with reference to the accompanying drawings:
1 is a side view of a first exemplary embodiment of a four-valve high-pressure pump;
FIG. 2 is an enlarged cross-sectional view showing a pump portion of the 4-valve high-pressure pump of FIG. 1 cut away; FIG.
Figure 3 is a sectional view taken along line III-III in Figure 1;
4 is a cross-sectional view of a second exemplary embodiment of a four-valve high-pressure pump, similar to FIG. 3;
5 is a cross-sectional view of a fourth exemplary embodiment of a four-valve high-pressure pump, similar to FIGS. 3 and 4;
Figure 6 schematically shows that the valve unit can be disassembled from the pump portion of the high pressure pump;
FIG. 7 is a view similar to FIG. 1, showing a fourth exemplary embodiment of a four-valve high-pressure pump;
FIG. 8 is a 4-valve high pressure pump shown in the direction of arrow 350 in FIG. 7;
FIG. 9 is a view similar to FIG. 8 with the inlet housing portion pivoted; FIG.
Fig. 10 is a four-valve high-pressure pump of Figs. 1 to 3 and Fig. 6 in which the inlet housing portion is pivoted.

First, referring to FIG. 1, key components of a four-valve high-pressure pump are shown as side views. The 4-valve high-pressure pump is indicated generally by the numeral 1. The pump includes, for example, a drive 2, which may be electrically or pneumatically operated and may be of any design. The drive 2 is only partially shown and schematically shown. A key part in the present invention is the actual pump part 3, which will be described in more detail below. The pump portion communicates with the drive 2 by means of a tie rod 4 (see FIG. 3) in the form of four rods, the four tie rods being guided through the pump portion 2 guided nut 5 from below.

Particularly, as shown in Fig. 2, the pump portion 2 includes a cylinder 9 whose inside is separated by a piston 6 into a lower operation chamber 7 and an upper operation chamber 8. As shown in Fig. In each case, rigid cylinder blocks 10 and 11 are arranged above and below the cylinder 9. The cylinder blocks 10 and 11 are formed in an octagonal shape as shown in the plan view of Fig. 3, and the tie rods 4 pass through the cylinder block. The two cylinder blocks 10 and 11 are arranged so as to be adjacent to each other at the end opposite to the opposite side (end face) and in the angled form in the central region And each of the transition channels 12 and 13 which opens into the operation chamber 7 or 8.

The piston 6 is arranged on the piston rod 14 which is guided upwardly from the cylinder block together with the first portion 14a through the transition channel 12 of the cylinder block 10. [ The first portion 14a of the piston rod 14 is in communication with the starting element of the drive 2 as shown in Fig.

Similarly, the lower portion 14b of the piston rod 14 is guided downwardly through the lower cylinder block 11 and, as shown similarly in FIG. 1, in the piston rod guide 16, Moved together.

Each valve unit 17 and 18 is screwed onto the mating faces of the cylinder blocks 10 and 11. [ Each valve unit 17,18 has housing portions 20 and 21 through which media channels 22 and 23 pass. The media channels 22 and 23 extend in a vertical branch over substantially the entire vertical dimension of the housing portions 20 and 21 but are then bent at a right angle bend, thus leading to the sides of the housing portions 20, 21, respectively, flush with the adjacent ends of the transition channels 12 and 13, respectively.

1 and 2, the valve unit 17 illustrated on the left side is configured as an inlet valve unit. The housing portion 20 connected to the inlet valve unit is therefore referred to below as the " inlet housing part ". The inlet housing portion has an inlet 24 through which a medium to be pumped is fed at a specific charging pressure. The inlet 24 leads to the medium channel 22 and more precisely to a point between the two spring-loaded non-return valves 25, 26.

The valve unit 18 illustrated on the right in Figures 1 and 2 is used as an outlet valve unit. The housing portion 21 connected to the outlet valve unit is therefore referred to below as the "outlet housing part ". To this end, the outlet housing part has an outlet 27 starting from a point in the medium channel 23 located between the two spring-loaded non-return valves 28, 29.

The operating mode of the pump portion 2 generally corresponds to the operating mode of the prior art and is therefore not specifically described herein.

Figure 2 shows the pump part 2 during the downstroke of the piston 6. Due to the pressure exerted by the piston 6, the inlet non-return valve 25 is now closed and the outlet non-return valve 29 is opened. The pumped medium is pushed downwardly from the lower operating chamber by the piston 6 and flows into the medium channel 23 on the transition channel 13 and flows through the open non- (27).

Return valve 26 in Figure 2 due to the result of the load pressure of the medium supplied by the inlet 24 and as a result of the suction effect of the piston 6 during downward movement, Returning from the inlet 24 into the medium channel 22 and from there upward through the non-return valve 26 into the transition channel 12 and finally reaching the upper side of the cylinder 9 And can be introduced into the operation chamber 8. During this process, the upper outlet non-return valve 28 of Fig. 2 is sealed.

During the upstroke of the piston 6, the non-return valves 25, 26, 28, 29 change the opening state. The medium supplied by the inlet 24 then flows downward in the medium channel 22 and into the first working chamber 7 of the cylinder 9 from below and is located in the second working chamber 8 The medium reaches the outlet 27 by the outlet non-return valve 28 from the piston 6 shifting in the upward direction.

The pump portion 2 described herein is important for the arrangement of the four valves 25, 26, 28, 29 in the individual valve units fixed to the cylinder block 10, 11 from the outside. This design approach has several advantages:

On the one hand, it is possible to remove the valve units 17, 18 from the central pump portion for transportation. In this case, an assembly having a weight that is relatively easy to handle is possible. Thus, it is possible to realize a weight of about 10 kg for the assembly, in particular the material used is aluminum.

At least equally important advantages of the arrangement described above are that it is possible to easily maintain the different valves 25, 26, 28, 29. In the case of disturbance, for example blockage, the housing blocks 20, 21 of the valve units 17, 18 can be easily removed from the central part, as schematically shown in figure 6 . In particular, the valves 25, 26, 28 and 29 can also be easily checked or, if necessary, replaced without the need to disassemble the entire pump part 2.

In the exemplary embodiment described above, only one inlet 24 and only one outlet 27 are provided. However, configurations in which a plurality of inlets and / or outlets are used may also of course be considered. Two such examples are shown in Figures 4 and 5.

In Figure 4, the pump portion 103 has one inlet 24 and three outlets 127a, 127b, and 127c. The pump may be used, for example, as a reservoir, to provide an outlet 127a, although outlets 127b and 127c are used for other customers.

In the exemplary embodiment shown in Figure 5, two inlets 224a and 224b and five outlets 227a, 227b, 227c, 227d, and 227e are provided. Thus, seven faces of the cylinder blocks 210 and 211 are occupied. It is also possible that the eight faces of the cylinder block 210, 211 are occupied by additional outlets or inlets. This is not the case in the exemplary embodiment shown in FIG. For this purpose, the openings provided in the cylinder blocks 210 and 211 are instead closed by a closure plate 230.

In many cases, it is not necessary to completely remove the housing portions 17, 18 including these valves in order to keep the different valves in the pump portion 3. As shown in FIG. 10 for the representative embodiment of FIG. 1, it is sufficient to remove only three of the four set screws 19. The corresponding housing portion 17 or 18 can then be pivoted about the remaining screw 19 as a pivot axis. Thereafter, the plugs 31 that seal the openings 30 of the medium channels 22 and 23 can be easily accessed and valves 25, 26 and 28, 29 for maintenance are connected to the medium channels 22, 23 ) So as to be easily reached.

Figures 7-9 illustrate a representative variant embodiment in which the pivoting movement is performed in a somewhat different manner. Here, an individual rotary shaft 333 is coaxially provided at the inlet 324 and the outlet 327. When the four setscrews 329 are released, the corresponding housing portions 317 and 318 can be pivoted about the rotational axis 333 as shown in Fig. Then again, the leading plugs to the media channels can be accessed and removed for maintenance.

Claims (3)

a) comprising a drive (2);
b) a pump part (3), said pump part (3) comprising:
ba) cylinder 9;
bb) two cylinder blocks (10, 11) arranged on the end faces of the cylinder (9) and in which each of the channels (12, 13) extends, said channel (12, 13) Into the outer surface of the cylinder block 10 at the end thereof and communicates with the interior of the cylinder 9 in the central region;
c) an inlet housing part (17), said inlet housing part (17) comprising:
return valve 25 and 26 are arranged on two faces above the opening point of the inlet 24 and at the ends opposite to each other, the cylinder block 10 (11), and a medium channel (22) in communication with each of the transition channels (12, 13);
d) an outlet housing portion (18), said outlet housing portion (18) comprising:
an outlet 27 for the medium to be pumped;
return valves 28 and 29 are arranged on two faces above the opening point of the outlet 27 and at the opposite ends of the cylinder block 10 and 11 And a medium channel (23) in communication with each of the transition channels (12, 13);
e) a piston (8) movable back and forth in the cylinder (9) and driven to communicate with the drive (2)
f) The inlet housing part 17 and / or the outlet housing part 18 are releasably secured in the transverse direction above the cylinder blocks 10, 11 so that they can be removed without further decomposition of the pump part 3 Pressure pump. 2. A device according to claim 1, characterized in that the inlet housing part (7) and / or the outlet housing part (8) are pivoted about an axis extending perpendicularly to the axis of the cylinder (9) Wherein the pump is rotatable. 3. A device according to claim 1 or 2, wherein the medium channel (22) of the inlet housing part (17) and / or the medium channel (23) of the outlet housing part (18) Wherein the at least one opening (31) reaches at least one of the openings (31).

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