WO2017080733A1

WO2017080733A1 - Tank top and tank

Info

Publication number: WO2017080733A1
Application number: PCT/EP2016/074260
Authority: WO
Inventors: Martin Sauer
Original assignee: Evoguard Gmbh
Priority date: 2015-11-09
Filing date: 2016-10-11
Publication date: 2017-05-18
Also published as: CN209035038U; EP3374101A1; PL3374101T3; DE102015119253A1; EP3374101B1; DK3374101T3

Abstract

In a tank top (T) for a tank (1), comprising a lance (9) for spraying a cleaning medium, which penetrates the lance (9) in the form of a substantially axial main flow, from spray holes (11) in the lance (9), and comprising at least one spray head (211), the holes (11) are designed as spray nozzles (S) in a nozzle member (R) that is coaxially integrated into the lance (9) and has a surface arrangement (F) with which the main flow is in contact and which allows turbulent flow conditions to be created in the area of the spray nozzles (S).

Description

Tank top and tank

The invention relates to a tank top according to the preamble of claim 1 and a tank according to claim 17.

On tanks in the food and beverage industry, fittings required for the tanks are combined to form a so-called tank top or tank dome fitting. The tank top is eg a unit with at least one vacuum valve, a safety valve, with measuring technology and cleaning technology. For example, the tank top, which is located at the top of the tank, must be cleaned during tank cleaning on its interior surfaces contacted by the product. To clean the tank provided spray or jet cleaner can not ensure a thorough cleaning of the tank. Therefore, to clean the inside of the tank, spray holes are placed in a lance passed through the tank top to a spray head. For this purpose, for example, the technical information document "GEA TUCHENHAGEN, tank safety system VARITOP ^® "; Publication number 02/2010, the company GEA MECHANICAL Equipment / GEA Tuchenhagen, DE-40468 Dusseldorf, pp. 10/1 and 10/8 referenced. On page 10/8, the spray holes named as cleaning holes can be seen in the course of the cleaning lance leading to the spray head. The holes are usually arranged so that in the tank top as possible to be wetted all surfaces to be cleaned.

Furthermore, it is known to provide welded or screwed separate conical or flat jet nozzles in the cleaning lance. The bores or nozzles branch off the cleaning medium required for cleaning the tank top from the main stream, which comprises, for example, cleaning devices arranged at the lower end of the lance, such as e.g. supplied a spray head.

Inserted into the lance, cylindrical holes produce only a very tightly focused spray, which corresponds for example to a conventional spray ball. Due to the thin wall thickness of the lance of usually only 1, 5 to 2.0 mm influencing the beam shape is not possible. This is not a disadvantage for a spray ball whose spray jets have to spread more distant tank wall areas, but is disadvantageous in the cramped conditions, for example in the tank cross piece, since only a very small area can be acted upon directly with the cleaning agent with the tightly focused spray. This means that a large number of holes, possibly with large diameters, is required for safe cleaning, resulting in a high consumption of cleaning medium. The use of separate conical or flat jet nozzles in the lance is by the unit price of Nozzles and the costly introduction into the lance by welding or screwing in welded sleeves expensive. Also, such nozzles are unfavorable due to the limited space in the tank top, and there are, especially in bolted nozzles, hygienic problems.

The invention has for its object to avoid the disadvantages of the solutions available on the market and to ensure a reliable cleaning with a minimum number of holes in the lance despite the limited space in the tank top. Furthermore, a tank is to create, which is characterized by a cost-effective, reliable to clean and thus low-maintenance tank top.

The stated object is achieved with the features of claim 1 and claim 17.

The nozzle body is easy to manufacture and not limited in its wall thickness by the wall thickness of the lance, so that the holes can be formed as spray nozzles, which support the formation of a wide-fanned, powerful spray or spray cone. The surface arrangement provided in the nozzle body generates, e.g. in an annulus, i. at the entrance to the spray nozzles, a strong turbulence, which is essential for the fanning of the rays. Without this surface arrangement, a largely laminar flow would prevail in the annular space and the generated jet shape would be a largely focused jet despite the nozzle shape. The combination of the spray nozzles and turbulent flow conditions at the spray nozzles thus produces a wide fanning out of the spray jets. As a result, the spray jets evenly coat large areas with the cleaning medium, even in the cramped space conditions in the crosspiece of the tank, so that reliable cleaning is ensured with a minimum number of spray nozzles. Furthermore, the turbulence in the spray nozzles reduces their throughput. Overall, the above arrangement leads to a lower detergent consumption and to a more effective cleaning of the crosspiece and its internals. The nozzle body has in the center on a passage through which the cleaning medium in the direction of the tank cleaning device or spray head can use approximately the full nominal diameter of the cleaning lance.

The tank, which is connected to a food filling line, is characterized by a low-cost, efficiently cleaned, low-maintenance tank top.

It may have the nozzle body an at least substantially rotationally symmetrical cross-section, and easy to produce. It is expediently a conveniently usable nozzle ring, for example made of metal. Alternatively it could be a connecting flange for the lance. Suitably, the surface arrangement of the nozzle body has an open to the interior of the nozzle body, undercut annular space and in the direction of the main flow downstream of the annulus and then an approximately transversely oriented to the direction of the main flow, with respect to the inner diameter of the lance slightly protruding Fang collar on. The catch collar is formed either with circumferentially distributed, individual trapping blades, or passes in the circumferential direction. By arranged between the trailing blades spacings, the turbulence in the annulus can be influenced, since the partial introduction of the main flow generates greater turbulence than a closed catch collar. In this case, the spray nozzles can be arranged at the individual catch blades or in the intermediate spaces between them, wherein the turbulence is directly smaller at the catching blade than in the area between the catching blades. The greater the turbulence at the inlet of the spray nozzle, the larger the opening angle of the spray cone formed. The opening cone of the spray jets can thus be optimally adapted to the requirements by the arrangement and size of the intermediate spaces and the position of the spray nozzles relative to these. Furthermore, only a small part of the nominal cross section of the lance is stressed by the intermediate distances, and thus the flow in the direction of the cleaning device or spray head is less affected.

The spray nozzles are advantageously fanned spray cone producing cone spray nozzles.

The spray nozzles are placed in the nozzle body at different angles relative to the axis of the lance to thoroughly clean the product touched surfaces of armatures disposed in the tanktop, the inner wall of the crosspiece, and the outer wall of the lance. The inner mouths of the spray nozzles should be within the annulus.

To provide particularly effective fanning spray nozzles, e.g. To be able to shape cone jet nozzles, the wall thickness of the nozzle body is expediently greater than the wall thickness of the lance, at least in the region of the annular space.

Conveniently, the spray nozzles for dispensing each of a wide-spread spray to the outside, for example, approximately conical, preferably with a radius following a cone-generating, a straight cone-generating, or in that adjoins an inner cylindrical inner portion, an outer cone section. The cross section of the spray nozzles may optionally be different from a circular area, for example square rectangular, oval, asymmetric or the like. It may be expedient if the outer mouth of the spray nozzle is about twice as large as the inner mouth. Among other things, it can achieve spray jets, which have an opening angle of about 30 ° or more.

It is also favorable if the annular space has a convexly rounded inner wall and the catching collar or each catching blade has an upper side which rises in the direction of the main flow, preferably concavely curved and harmoniously merges into the inner wall of the annular space. As a result, sufficient cleaning medium is diverted from the main stream flowing to the spray head and distributed under turbulent flow conditions for the spray nozzles in the annular space.

In order to waste as little as possible the nominal cross section of the lance, in the nozzle body, the intermediate distances between regularly distributed catching blades can be greater than the circumferential extents of free catching blade ends.

Seen in the direction of the main flow, each catching blade can be approximately trapezoidal, preferably with concavely rounded flanks, which are transferred into the intermediate distances or the inner diameter of the nozzle body.

In order to achieve the optimum flow conditions and pressure conditions in the annular space, it is expedient if the inner wall of the annular space in the direction of the main flow and seen in cross-section at an angle slightly more than 90 ° with respect to the axis sloping outwards, shorter initial section and a rounded subsequent Having at an angle of about 45 ° inwards and towards the Fang collar leading, longer end portion. Cleaning medium branched off from the catch collar or catching vanes is guided along the end section against the direction of the main flow to the mouths of the spray nozzles and dammed along the initial section with respect to the incoming main stream and pressed into the spray nozzles.

Since the outside of the lance and the nozzle body must be thoroughly cleaned, it may be advantageous if seen in a cross section a rounded outer wall of the nozzle body forms a protruding beyond the outside of the lance bead, which in the direction of the main flow with only slightly less than Having 90 ° outwardly sloping shorter initial section and a rounded subsequent, with about 45 ° inwardly extending, longer end portion. Thereby, adhering to the outside of the lance and flowing down under gravity cleaning medium is guided around the bead, without tearing, and placed on the underlying outer side of the lance. Suitably, the outside of the bead runs approximately parallel to the inner wall of the annular space. In order to integrate the nozzle body largely seamless in the lance, it is advantageous if the nozzle body has upper and lower annular flanges approximately with the wall thickness of the lance.

The nozzle body is used with the annular flanges, for example, between separate sections of the lance, preferably welded.

To ensure the cleaning of the outside of the lance over a large area, it is also expedient if at least some spray nozzles are inclined at such angles in and / or against the direction of the main stream, that the respective spray jet or spray tangent to the outside of the lance at least or even at an acute angle.

Furthermore, another embodiment as a nozzle body is conceivable, which has a non-annular shape, but for example, has the shape of a polygon. Such an arbitrary shape would, for example, be produced by casting technology. A rotationally symmetrical basic shape of the nozzle body is only the preferred and easiest to manufacture variant.

Embodiments of the subject invention will be explained with reference to the drawings. Show it:

1 is a tank top in perspective view, partially in section, for mounting on a tank,

Fig. 2 shows e.g. an equipment of the tank top of Fig. 1 forming nozzle body R in an axial section,

3 is a plan view of Fig. 2,

4 is a bottom view to Fig. 2,

Fig. 5 is an enlarged detail of Fig. 2, and

Fig. 6 is a non-limiting example of a spray jet image producible with the nozzle body.

1 shows a tank top T (or a tank-type armature) which is mounted or mountable, for example, on the top of a tank 1. The tank 1 equipped with the tank top T is used, for example, in the food or beverage industry, in particular in beverage filling plants. were used, wherein cleaned in cleaning cycles both the tank and the tank top T inside.

The tank top T is mounted with an optional flange 2 over an opening 3 of the tank 1 and comprises, for example, a tubular crosspiece 4, to which a vacuum valve 5, an overpressure safety valve 6 and a connection 7 for cleaning medium are attached. The terminal 7 is connected via a U-tube 8 to the interior of the crosspiece 4 and contains, for example, in a spacer 12, a valve 11 1.

Connected to the connection 7 is a lance 9, which is installed approximately vertically in the crosspiece 4 and, in the illustrated embodiment, comprises, for example, an upper, large-diameter section 9a and a lower, small-diameter section 9b, which are connected via a funnel-shaped intermediate piece 10 and an inserted nozzle body R, which has a surface arrangement F. At the lower portion 9b are mounted cleaning devices 21 1 (e.g., as a spray head) for cleaning the interior of the tank 1, which are supplied with cleaning medium flowing in the lance 9 in an approximately axial main flow. In the nozzle body R spray holes 11 are provided, which are aligned with the built-on tank top T, the inner wall of the crosspiece 4 and the outer wall of the lance 9 and can be arranged at different angles with respect to the axis X of the lance 9 and the nozzle body R. , The nozzle body R is here e.g. a nozzle ring R and at least approximately coaxially integrated into the lance 9, e.g. welded, and will be explained with reference to the other figures. The nozzle body R has e.g. for manufacturing reasons in approximately rotationally symmetrical cross-section, could alternatively be polygonal or an arbitrarily shaped, hollow connecting flange of the lance 9.

In Fig. 2-5, the nozzle body R formed as a nozzle ring upper and lower coaxial annular flanges 13, whose wall thickness corresponds approximately to the wall thickness of the lance 9, and between which an outwardly projecting bead 14 forming wall 17 is provided, the wall thickness is greater than the wall thickness of the annular flanges 13 and the lance 9, preferably about twice as large. The surface arrangement F in the interior of the nozzle ring R serves to create turbulent flow conditions in the region of the spray bores 11, which significantly influence the shape of the spray jets generated by the spray bores 11.

The spray holes 11 are formed in the nozzle ring R, for example, as spray nozzles S, such as cone jet nozzles, in the wall 17 (see Fig. 5), the inside smaller and larger outside Own estuaries. Each outer mouth can be about twice as large as the inside mouth.

In detail, the surface arrangement F comprises an open to the interior of the nozzle ring, concave in cross-section annular space 15 and in the direction 19 of the main flow along the axis X to the annular space 15 subsequent Fang collar 20. The inner nozzle orifices should be in the annular space 15. The catch collar 20 is formed in the embodiment shown from individual, with intermediate intervals 22 regularly distributed catch blades 21, but can, as indicated by dashed lines at 21 'in FIG. 3, pass in the circumferential direction. 3, the trailing blades 21 are approximately trapezoidal in shape and have concavely rounded flanks 24, which run into the interspaces 22 and the inner diameter of the nozzle ring R. In the intermediate intervals 22 thus the full nominal cross section of the lance 9 for the main flow is available. Each catching bucket 23 has an upper side 23 which rises opposite to the direction 19 and which, preferably, is concavely rounded and is harmoniously transferred into an inner wall 16 of the annular space 15. The free ends of the trailing blades 21 are preferably shorter in the circumferential direction than the intermediate distances 22.

The inner wall 16 of the annular space 15 has seen in the direction 19 a shorter initial portion 16a, which drops at an angle of slightly less than 90 ° with respect to the axis X to the outside and is converted via a curve in a longer end portion 16b, the lower an angle of about 45 ° with respect to the axis X downwards inwardly. The cone spray nozzles S are mounted in the wall 17. The bead 18 has an outer side 18 which runs approximately parallel to the contour of the inner wall 16. In the embodiment shown, the upper annular flange 13 is adjoined by an initial section 18 sloping outwards at an angle of more than 90 °, which is rounded and converted into a longer end section 18b which is rounded at approximately 45 ° and rounded into the lower annular flange 13 , This contour (egg-shaped or teardrop-shaped) of the bead 18 ensures that cleaning medium flowing down along the outside of the lance 9 and the upper ring flange 13 adheres to the bead 18, is guided to the lower ring flange 13 and further onto the outer wall of the lance 9 and cleans it. This cross-sectional concept is only a non-limiting option.

Fig. 3 illustrates in the plan view of the nozzle ring R of Fig. 2, as several here designed as a cone jet spray nozzles S at different angles in the nozzle ring R, in the initial portion 18 a, are arranged, which may have the same or different effective diameters, while the bottom view of FIG. 4 is also provided at the end portion 18 b at least one cone jet nozzle. The cone jet nozzles can be used in the area of Intermediate distances 22 may be arranged, or directly at the trailing blades 21, since both in the area of the trailing blades 21 and in the annular space 15 in the region of the intermediate distances 22 between each two trailing blades 21 turbulent flow conditions are generated.

FIG. 5 shows a spray nozzle S embodied as a cone jet nozzle which assists in the formation of a spray jet or spray cone K that is broadly fanned out at an angle .alpha. The cone jet nozzle is formed, for example, with a radius 26 corresponding to a convexly curved generating line 25 rotationally symmetrical. Alternatively, the cone jet nozzle S could have a rectilinear generatrix, or a cylindrical inner portion and a conical outer portion. The axis of this cone jet nozzle is inclined at an angle with respect to the axis X, that the wide-spread spray jet or spray cone K at least tangent to the outer wall of the lance 9 or, as shown, meets at an acute angle. The cross section of the spray nozzle S could alternatively be non-circular.

Fig. 6 illustrates, as a non-limiting example, the nozzle ring equipped with seven cone jet nozzles from which emerge in a cleaning cycle, the wide-spread spray cone K shown. Three of the spray cones K are inclined so that they impinge on the outside and on the outside of the lance 9 and spread over upper areas in the interior of the tank T of FIG. Three further spray cones K are inclined somewhat farther outwards, and are directed, for example, to the vacuum valve 5 and the safety valve 6 and the like in FIG. 1 as well as to the inside of the crosspiece 4. A spray cone K is directed downwards and aims, for example, at a further, unspecified highlighted armature of the tank T of Fig. 1. Despite the confined space in the tank T, ie, a relatively small distance between the nozzle body R and the inner wall of the crosspiece 4 and the fittings installed there sweep the wide fan spray K large surface areas intensively with cleaning medium, so that with a small number of spray nozzles S optimal internal cleaning of the tank T is achievable. If necessary, at least one further identically or differently configured nozzle body R is installed in the tank T.

The cone jet nozzles S open, for example, vertically in the outer side 18. The surface arrangement F of the nozzle body R causes in the annular space 15 strong turbulence, resulting in that the spray jets are fanned out of the spray nozzles S far. From a spray nozzle S approximately in the middle between two trailing blades 21, the strongest fanning is generated, while the fanning of a spray nozzle S directly above the fishing blade 21 weaker. The turbulences on and in the spray nozzles S generated via the surface arrangement F from the main flow flowing continuously to the spray head 211 are shown in FIG. on with the nozzle cross section causally important for an optimal fanning of the spray jets and also reduce the throughput through the spray nozzles.

Claims

claims

1. Tank (T) for a tank (1), in particular in the beverage filling industry, with a lance (9) for spraying a lance (9) with an approximately axial main flow passing through cleaning medium at least from the lance (9) provided spray -Bohrungen (1 1) and at least one on the lance (9) provided spray head (21 1), characterized in that the bores (1 1) as spray nozzles (S) in at least one in the lance (9) integrated nozzle body (R ) are formed, which has inside a swept by the main flow surface arrangement (F), with the turbulent flow conditions can be generated in the region of the spray nozzles (S).

2. Tanktop according to claim 1, characterized in that the nozzle body (R) is hollow and has a substantially rotationally symmetrical cross-section, preferably as approximately coaxially formed in the lance (9) integrated nozzle ring.

3. Tank top according to claim 1, characterized in that the surface arrangement (F) to the interior of the nozzle body (R) open, undercut annulus (15) and in the direction (19) of the main stream downstream of the annulus (15) has a transverse to the direction ( 19), opposite the inner diameter of the lance (9) protruding Fangkragen (20) which is formed either with circumferentially with intermediate intervals (22) distributed, individual trailing blades (21) or circumferentially continuous (21 ').

4. tank top according to claim 1, characterized in that the spray nozzles are spray cone generating cone spray nozzles.

5. Tank top according to claim 3, characterized in that the spray nozzles (S) in the nozzle body (R) at different angles with respect to the axis (X) of the nozzle body (R) are arranged, preferably with internal openings in the annular space (15).

6. tank top according to claim 3, characterized in that the wall thickness of the nozzle body (R) at least in a wall (17) in the region of the annular space (15) is greater than the wall thickness of the lance (9).

7. tank top according to claim 1, characterized in that the spray nozzles (S) for delivering an outgoing spray jet (K) to the outside approximately conically expand, preferably curved with a radius (26) or with a cylindrical inner portion and a subsequent, after externally expanding cone section.

8. tank top according to claim 7, characterized in that the outer mouth of the spray nozzle (S) is about twice as large as the inner mouth.

9. tank top according to claim 2, characterized in that in cross section of the annulus

(15) has a convexly rounded inner wall (16) and the catch collar (20) opposite to the direction (19) of the main flow rising, preferably concave curved and harmonious in the inner wall (16) of the annular space (15) passing, top (23) ,

10. Tank top according to claim 2, characterized in that the intermediate distances (22) between the regularly distributed catching blades (21) are larger than the circumferential extents free catching blade ends.

11. Tank top according to claim 2, characterized in that each catching blade (21) seen in the direction (19) of the main flow is approximately trapezoidal, preferably with concave rounded flanks (24).

12. Tank top according to claim 9, characterized in that in cross-section the inner wall

(16) of the annular space (15) in the direction (19) seen at a slightly more than 90 ° with respect to the axis (X) outwardly sloping, shorter initial section (16a) and a rounded subsequent, at an angle of about 45 ° has inwardly and in the direction of the catch collar (20) leading, longer end portion (16b).

13. A tank top according to claim 1, characterized in that in cross-section a rounded outer wall (18) of the nozzle body (R) forms over the outside of the lance (9) protruding bead in the direction (19) of the main flow to a slightly less than Having 90 ° outwardly sloping, shorter initial section (18a) and a rounded subsequent, with approximately 45 ° inwardly extending, longer end portion (18b).

14. Tank top according to claim 1, characterized in that the nozzle body (R) has upper and lower annular flanges (13) approximately with the wall thickness of the lance (9).

15. Tank top according to claim 1, characterized in that at least some spray nozzles (S) are inclined at such an angle in and / or against the direction (19) of the main flow, that their spray jets (K) the outside of the lance (9) at least tangent.

Tank top according to claim 1, characterized in that the nozzle body (R) see between separate sections (9a, 9b) of the lance (9) used, preferably welded, is.

17. Tank (1) with a tank top (T) at least according to claim 1, wherein the tank 1 (1) is connected to a food filling line.