EP0287622A1

EP0287622A1 - Barrelling installation

Info

Publication number: EP0287622A1
Application number: EP19870907008
Authority: EP
Inventors: Gabriel Guiho
Original assignee: LUBRIFIANTS ELF AQUITAINE Ste; Societe National Elf Aquitaine
Current assignee: LUBRIFIANTS ELF AQUITAINE Ste; Societe National Elf Aquitaine
Priority date: 1986-10-21
Filing date: 1987-10-19
Publication date: 1988-10-26
Also published as: FR2605253A1; FR2605253B1; WO1988003246A1

Abstract

Installation d'enfûtage permettant le conditionnement de produits de compositions différentes. Elle comporte une pompe (6) munie d'un circuit de rinçage (46) permettant la circulation de racleurs (100, 101). Application à l'enfûtage des lubrifiants.Drum installation allowing the packaging of products of different compositions. It comprises a pump (6) provided with a rinsing circuit (46) allowing the circulation of scrapers (100, 101). Application to the drumming of lubricants.

Description

FUTAGE INSTALLATION

The present invention relates to a barrel installation for packaging products of different compositions, these products circulating in a network of pipes which are cleaned after each passage of one of said products.

It is known to use scraping systems to clean industrial installations which include a network of pipes, valves and the like, in which products of different composition must circulate. This cleaning is for example used in oil conditioning installations, known under the name of drums.

To clean these installations, a scraper is used which circulates in the pipes under the effect of a control fluid, generally consisting of compressed air (nitrogen).

Such a scraper is for example described in the German patent application n ° 3.032.532 filed on August 29, 1980 by H. SKIBO S I. These installations include valves and other devices which allow the passage of the scrapers.

An important problem to be solved in these installations is that of pumping. It is indeed impossible to clean a pump with a scraper. It is therefore a first object of the invention to provide an installation of this type which allows rapid and automatic cleaning of the pump, this cleaning including a rinsing operation and a draining operation.

To do this, the installation according to the invention comprises at least one reservoir for storing the product to be put in, a boring head, a main pipe connecting said tank and said baking head and comprising a scraper, and a pump, and it is characterized in that the pump is connected to the main pipeline by a downstream side valve and a side valve upstream and a bypass circuit comprising a central valve, the two lateral valves and the central valve allowing the passage of the pigs in the main pipeline, the lateral valves allowing either the isolation of the pump or its connection to the main pipeline.

According to a complementary characteristic, the pump comprises an external cleaning circuit constituted by a cleaning loop and a reinjection pipe "in the main pipe to connect the cleaning loop to the main pipe by means of a re-injection pump. .

The installation according to the invention preferably comprises a second scraper and a positioning means for positioning a scraper downstream of the downstream side valve and the second scraper upstream of the upstream side valve. This positioning means advantageously consists of a blocking valve located downstream of the side, downstream valve and a column of a liquid product which extends to said blocking valve from a "position located upstream of the upstream valve.

More preferably, the installation comprises a starting means making it possible to send either one or two scrapers into the pipe and comprising a means for injecting compressed air, as well as a central injection nozzle allowing the starting and propulsion of a scraper and a side injection nozzle allowing the departure of either one or two scrapers. Finally, it also preferably includes a means for injecting rinsing product, located substantially at the same level as the central means for injecting compressed air.

According to another embodiment, the installation according to the invention comprises at least two drumming heads mounted in series on the main pipe and an inlet means allowing the storage of two scrapers and their re-shipment to the means of departure, said departure means and said arrival means being located in the immediate vicinity from each other and interconnected by an isolation valve.

The invention will be better understood on reading the following description given in an illustrative and in no way limitative manner with reference to the drawings appended in the text:

FIG. 1 represents an installation according to the invention,

FIGS. 2a and 2b represent a ring valve,

FIGS. 3a and 3b represent a pinch valve,

- Figure 4 shows a second embodiment of the invention.

FIG. 1 shows an installation according to the invention with a single drumming head.

The installation comprises a main pipe (1) connecting product tanks (2, 3, 4) to a cask head (5) via the pump (6) of the upstream valve (7) and the downstream valve (8). Chague reservoir 2,3, 4) is connected to the piping (1) via a valve (10) shown in Figure 2 _A and 2 _R.

This valve (10) known to those skilled in the art under the designation of ring valve, comprises a main pipe (11) connected to the pipe (1) by the two flanges (12) and (13) and a pipe d intake (15), connected to the tank by the flange (16). Diametrically opposite the intake manifold, the valve includes a control assembly (17) comprising a chamber (20) in which the piston moves (21) secured by its rod (22) to a valve (23). This disc (23) is provided with a circular opening (24) whose diameter is very slightly greater than that of the scraper (100). The intake manifold (15) opens into the main manifold by means of a light (30) in the laguelle slides the valve (23) between the open position of the valve, FIG. 2a and the closed position, FIG. 2b.

In the open position, FIG. 2a, the circular opening (24) faces the light (30) so that the fluid coming from the intake manifold (15) can enter the main tubing according to arrows (31) and (32). In this same position, the scrapers cannot circulate since they are bioguated by the upper part of the disc.

In the closed position, FIG. 2b, the valve is in the high position and its lowest part is embedded in the light (30) so as to close it and prevent any communication between the intake manifold and the main manifold, but in then authorizing the passage of the scraper.

The bypass circuit (40) comprises the two valves (8) and (7), the main loop (41) and the connection pipes (42) and (43), a valve (45) and a loop (46) of cleaning consisting of the pipes (47) and (48), the two valves (49) and (50). A pipe (51) connects this loop to the valve (8) via a pump (60).

The valves (7) and (8) are known to those skilled in the art under the name of sleeve valves and are more precisely represented in FIGS. 3a and 3b.

The valve shown in Figure 3a has a main tube (61) connected to the pipe (1) by the flanges (62) and (63) and a secondary tube (65) connected to one of the tubes (42) and (43) by the flange (64). The tubing (65) opens into the main tubing via an annular chamber (66) in the laguelle can slide the sleeve (67) so as to come opposite a window (68) or d 'a clearance zone (70). In the open position, FIG. 3a, the sleeve (67) faces the clearance zone (70) so that the pipes (61) and (65) are in communication. In the closed position, FIG. 3b, the sleeve (67) faces the window (68) and the two pipes are insulated. Both in the open position and in the closed position, the scraper (100) can circulate.

The valves (49) and (50) are solenoid valves of the conventional type, while the valves (45) and (102) are solenoid valves which allow either the passage of the fluid and of the scraper (100) or the blocking of both. These valves are known to those skilled in the art under the name of a full-flow ball valve and will not be the subject of a further description. The valves (7) and (8) are each provided with a tube (104) and (105) and with a valve (103) and (101) which allow them to be placed in an atmosphere.

Upstream of the tanks (4, 3 and 2), the installation comprises a device (110) for storing and controlling two scrapers (100) and (111).

This device (110) is shown diagrammatically in: FIG. 1, it is constituted by a chamber (115) of length slightly greater than the length of the two scrapers, this chamber being closed by one of its ends (116) and connected to the tubing (1) by its second end (117). The chamber (110) comprises a first pipe (120) connected to a pipe (121) for the admission of air, provided with a solenoid valve (122). The same pipe (120) is also connected to a pipe (123) and to the solenoid valve (124) for decompression. In the central part, the chamber (110) comprises the piping (130) also connected to a piping (131) and to the solenoid valve (132) for the admission of air and to the piping (133) and the valve (134) for decompression. At the same level as that of the piping (130), the chamber (110) also comprises a piping for injecting rinsing products (140) connected to a rinsing tank (141) by means of the pump (142). and the solenoid valve (143).

At its other end, the installation is connected to the drumming head (5). The boring head (5) opens into a chamber (150) similar to the chamber (110) and mistletoe can therefore contain two scrapers (100) and (110). This chamber (150) is provided with an air intake pipe (151) and a decompression pipe (152), each being controlled by a solenoid valve (153) and (154). In its central part, the chamber (150) is connected to the piping air intake (161) and to the pressure relief pipe (162), each comprising a solenoid valve (163) and (164).

In this end, the piping (1) has three joints (170), (171), (174) which allow the height of the chamber (150) and therefore of the drumming head (5) to be exceeded. In addition, these joints of course allow the passage of the scrapers.

The installation thus represented operates in the following manner.

In a first stage, called the waiting stage, the two scrapers (100) and (111) are stored in the chamber (110), which will be called the departure station. Below the casing head (5), a container (175) is placed.

In the next phase, the cashing operation, we first choose the tray from duguel we will fill the container (175). For the selected tank, the valve (10) is placed in its open position, that is to say the position in the tank the contents of the tank (4) can be transferred inside the main piping. The valves (7) and (8) are also placed in their open position, that is to say the position along the line the tube (65) is placed in communication with the tube (61), the valve (45) is closed. ), the valve (102) is opened. The pressurization of the pump (6) allows the suction of the product to be put in and its delivery to the boring head (5). In a manner known per se, the pump (6) is a variable flow pump (direct current), the speed of rotation of which is controlled as a function of the filling rate of the container (175). This order can be done very easily from a continuous weighing of this container.

After this drumming operation, it is necessary to carry out a scraping step. In the case where the tank used is empty, to carry out the scraping operation, the valve (10) is closed so as to isolate the tanks from the piping (1). The pump (6) is drained via the loop (46) of the pump (60) and the piping (51) and the product thus collected is reinjected in the valve (8). The valve (45) being placed in the open position, the valve (102) being held in its open position, the scraping operation can now be carried out. This is controlled from the chamber (110) by injection of compressed air either at the central piping (130), in this case a single scraper is sent, or at the piping (120), in in this case, the two scrapers are sent simultaneously. But you can also send the first scraper (100) first and then the second scraper (111). At the end of installation, the two scrapers (100 and 111) are received in the room (150) or the arrival station. By injecting air into the piping (151) into the chamber (150), the two scrapers are returned to their departure station.

In the case where the tray used was not empty at the end of the baking operation, the procedure is as follows. The valve (10) corresponding to the tank used is placed in its open position (shown in Figure 2a). The scraper (100) coming from the departure station (110) will abut against the valve (23) and thus discharge the product contained in the tubing (1) towards the corresponding tank via the tubing (15) . Then the valve (10) is placed in its open position which allows the free passage of the scrapers. We then proceed as in the previous case.

In the next step, we will rinse the installation and the pump. First of all, the valves (7) and (8) being closed, the displacement of the first scraper (100) is controlled, at the same time injecting of rinsing product contained in the tank (141) by action on. the pump (142) and injection through the piping (140). When the scraper (100) has moved a certain distance, the movement of the scraper (111) is controlled, so that the rinse aid moves in the installation under the combined action of the two scrapers. The distance between the two scrapers (100 and 111) is determined so that when the valve (102) is closed, the scraper (111) is blogged upstream of this valve, the second scraper (110) is located upstream of the valve (7) and the pressure behind the second scraper is maintained. When these valves open

(7) and (8), the entire installation between the two scrapers is now bathed in the rinsing fluid. The pump (6) is turned using the loop formed by the pipes (42, 43, 44), and the sleeve valves (7) and (8). After a certain time of flushing of the pump, the flushing fluid is reinjected into the valve (8) by ^" the piping (51) and the pump (60) after the valves

(7) and (8) have been closed. By reopening the valves

(102) and by re-injection of control fluid at the level of the chamber (110) the two scrapers as well as the rinsing fluids are evacuated towards the inlet chamber (150). The rinsing fluid contained between the two scrapers (110) and

(111) is retrieved by the barrel spout.

The advantage of this installation lies essentially in the possibility that it offers to be fully automated and to be able to be rinsed completely, including the pump (6). In addition, this installation makes it possible to carry out these rinsing operations while minimizing the volume of contaminates, that is to say downgraded products which are returned to manufacturing, and leading to a reduction of up to 99%. It also makes it possible to carry out in a very safe manner operations of drumming starting from products of different composition and in very fast times by reduction of dead times.

There is shown in Figure 4 an alternative embodiment of the invention according to laguelle the installation is complete and allows the use of a constant pressure pump, several barrel heads, each barrel head being adjusted by opening control between a high flow position and a low flow position.

This installation has the advantage of being able to carry out the drums of three drums using a single pump, this casing is done with great precision.

In order to achieve this looped installation, the arrival stations (150) and (110) are located in close proximity to one another and connected to each other by a regulating valve allowing the pressure to be adjusted.

In the same way as in FIG. 1, the installation shown in FIG. 4 comprises the tanks (2, 3, 4) connected to the main piping (1) by the valves such as gue (10). It also includes a pump (170) connected to the pipeline (1) by the valves (7) and (8), the ^' pipes (171) and (172). The pump (170) also includes the draining and rinsing circuit constituted by the pipes (173, 174) and the pump (175). The boring heads (180, 181, 182) are mounted in series on a straight part of the pipe. This assembly is articulated by means of the articulations (190, 191, 192, 193, 194 and 195) so as to be able to be moved vertically while allowing the passage of the scrapers at these articulations.

Chague cask head is scrapable, that is to say that it has an internal main tube placed along the axis of the main pipe (1). This main pipe has an internal diameter equal to that of the main pipe. The casing pipes which open out into the main pipes are, in this example, fixed. But one could provide an installation in laguelle these injection pipes are telescopic, this mistletoe allows not to need the joints (190, 191, 192, 193, 194 and 195).

In addition, each barrel head such as (180),

(181) or (182) has two open positions for their casing pipes. A first mistletoe position corresponds to a large flow and a second mistletoe position corresponds to a small flow.

In operation, the control valve (160) is open and the pump (170) is set to a pressure constant mistletoe is mainly determined by the viscosity of the product to be smoked. In a first phase, the cask spouts are adjusted to their high flow position.

This first phase ends at a determined time which corresponds to a fairly high filling rate of the barrels, of the order of 90 to 95%. This instant can be determined by the operator or by a weighing system placed under one of the drums or by any suitable system. At this time, all the cask heads are closed and are then opened again, but in their low flow position. The second filling phase therefore begins and the pressure inside the main pipe (1) is restored by the pump (170) and then adjusted according to a measurement representing the filling rate, this measurement originating for example from scales. placed under the barrels, by action on the regulation valve.

At the end of the operation, when the barrels are filled, the pump is stopped and the barrel drums are closed. ^•

It is possible by this method to obtain a fairly high filling precision, of the order of 100 g for a barrel containing 200 kg of products, this precision being of the same order as that of the scales usable for measuring the weight of the barrels.

When the drumming operation is finished, the installation is scraped and then rinsed.

At the start of operation, a scraper (110) is stored in the departure station while a second scraper is stored in the arrival station (150). The scraper (110) is sent into the installation by injection of compressed air as explained with reference to FIG. 1, then that the boring head (180) is in the open position and the heads (181) and (182) are in the closed position, the valve (160) being closed.

The product pushed by the scraper is evacuated by the boring head (180). When the scraper (110) is in the boring head (180) or at its immediate upstream end. its movement is stopped by stopping the injection of compressed air. The boring head (181) is open. The displacement of the scraper is re-initiated by injection of compressed air and the product contained in the installation between the head (180) and the head (181) is evacuated by the drumming head (181). In the same way, as soon as the scraper is in the boring head (181) or in its immediate upstream proximity, the injection is stopped, the injection head (182) open. This injection head (182) comprises a blocking device allowing the scraper to be blogged inside, this device being constituted by a tongue mounted to slide inside the barrel spout and which allows the scraper to be blocked in upstream of the injection tubing while allowing the evacuation of the product by the latter.

When opening the injection head (182), the blocking device is put in place so that, after controlling the movement of the scraper by air injection, the scraper comes to log on the tongue and is held there by the action of the pressure created by the injection of compressed air, this injection being maintained during the rest of the operations.

Once the scraper (110) is thus immobilized, the scraper on standby at the arrival station (150) is pushed towards the boring spout (182) by injection of compressed air so that the product contained in the installation between the arrival station (150) and the spout (182) is evacuated by the spout (182) as the scraper moves.

Then, the installation is rinsed in the same manner as that of FIG. 1. The valve (160) is closed and the rinsing liquid is recovered in the chamber (150) by the tubing (196).

To carry out these installations, any known scraping device, any ring type valve or known sleeve type valve can be used. Also, any known means of detecting the position of the scraper will be used, the most suitable being a magnetic detector.

Claims

- Casing installation allowing the packaging of products of different compositions comprising at least one tank (2,3,4) for storing the product to be cased, a casing head (5) and a main pipe (1) connecting said tank and said drumming head and comprising a scraper (100), said pipe being provided with a pump (6), characterized in that the pump (6) is connected to the main pipe (1) by a downstream side valve ( 8) and an upstream side valve (7) and a bypass circuit (40) provided with a central valve (45), the two side valves (7,8) and the central valve (45) allowing the passage of the scrapers, the side valves allowing either the isolation of the pump (6) with respect to the main pipeline (1) or its connection. - Drum installation according to claim 1, characterized in that the pump (6) comprises an external cleaning circuit constituted by a cleaning loop (46) and a pipe (51) for reinjection into the main pipe to connect the loop cleaning to the main pipe by means of a reinjection pump (60). - Installation according to claim 1, characterized in that it comprises a second scraper (111) and a positioning means (102) for positioning a scraper (100) downstream of the downstream side valve (8) and the second scraper ( 111) upstream of the upstream side valve (7). - Installation according to claim 3, characterized in that the positioning means is constituted by a blocking valve (102) located downstream of the downstream side valve (8) and a column of a liquid product which extends up to 'to said blocking valve from a position located upstream of the upstream valve (7). - Installation according to claim 4, characterized in that said liquid product is a rinsing product. - Installation according to claim 4, characterized in that it comprises a starting means (110) allowing to send in the pipeline either one (100), or two scrapers (100,111). - Installation according to claim 6, characterized in that the starting means comprises a means (121,131) for injecting compressed air. - Installation according to claim 7, characterized in that the injection means comprises a central injection nozzle (130) allowing the start and the propulsion of a scraper (100). - Installation according to claim 7, characterized in that the injection means comprises a lateral injection nozzle (120) allowing the departure of either a single (100) or two scrapers (100,111). - Installation according to claim 7, characterized in that the starting means comprises a means (140) for injecting rinse aid, located substantially at the same level as the central means (130) for injecting compressed air. - Installation according to claim 1, characterized in that it comprises at least two boring heads (180,181) mounted in series on the main pipe (1) and an inlet means (150) allowing the storage of two scrapers and their re-dispatch to the starting means (110), said starting means and said arrival means being located in close proximity to each other and connected together by an isolation valve (160). Installation according to claim 11, characterized in that each of the drumming heads (180,181,182) is provided with a means allowing the closing or the opening and in this way the boring head (182) situated on the side of the inlet means (150) comprises a locking means allowing the scraper to immobilize while allowing the product to be discharged by said head. baking.