DE2120683A1 - Device for automatic control of the refilling of a container, in particular a lubricant container - Google Patents

Description

Aktiebolaget Assa,

Atvidaberg, Sweden

Device for the automatic control of the refilling of a container, in particular a lubricant container

The invention relates to a device for automatically regulating the refilling of a container with a non-solid filler, in particular with a lubricant such as lubricating oil or grease, which is taken from the container and one or more consumers is supplied «The device contains a valve that controls the supply of medium to the container, the filler being added to the Valve inlet is supplied under excess pressure and the valve outlet is in communication with the container.

The filler, such as a lubricant, is a supply taken and fed to the valve by a pressure generator, e.g. by a pumping device or similar, which creates an overpressure in the supply line of the valve maintains.

The problem on which the invention is based is to create a device of the above type which is designed such that it certainly prevents the occurrence of such a state of equilibrium when the container is refilled from becoming as large as that of the container withdrawn and used by the consumer, e.g. a lubrication device Amount of lubricant if the filler is a lubricant. If the lubricant contains abrasive particles, then cause this under the above conditions wear and tear on valve j, causing it to leak.

Invention, the problem is solved by the valve through

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Moving a movable valve slide provided in the valve body is opened and closed. When the valve is open, the slide ensures that a connection between the inlet and outlet of the valve remains free. With the valve closed, this connection is blocked, using a snap-in or tilting device is the slider _s actuated by a movable piston located in the container wherein the piston is urged by a spring against the filler in the container, which acts as a kind of cylinder ■ is to be understood or contains one. The position of the piston is therefore a measure of the amount of filler present in the container, whereby it is the task of the tilting device to effect a quick, non-creeping opening and closing of the valve so that the valve is opened when the amount of filler present in the container falls below a certain given minimum value, and so that the valve is closed when the amount of filler in the container exceeds a desired maximum value. -

For the sake of simplicity, it is assumed below that the filler is a lubricant. Located on one side of the piston So there is lubricant and on the other hand air. The incoming lubricant moves the piston against the spring pressure. This moves the valve in such a way that it supplies the lubricant Shuts off when the container contains the correct maximum amount of lubricant. When removing lubricant from the container by pumping out the piston moves in the opposite direction Direction both through the pressure of the mouth as well as through the oppression that arises under the piston when the lubricant is withdrawn from the container. If only the predetermined minimum amount is left in the container of lubricant is present, the valve opens under the influence of the piston movement, which is why new lubricant is in can flow into the container.

The connected to the container Schmisrmittelverbraucher ^ s "B, a lubricant device is generally not performed so ₅ that he inlet side can withstand a high lubricant pressure * The ·

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The valve that shuts off the supply of lubricant to the container must therefore be very tight in the closed state, otherwise Lubricant could penetrate through the valve into the container and damage it and the lubricating device connected to it could, if the valve lets through more lubricant than is taken from the container. With not perfectly tight Valve enters this state when the supply line is pressurized and the lubrication device is not in operation.

To solve this problem, the facility has the following identifying features Features on. A housing belonging to the device, which in or on the wall of the container, preferably in one Lid attached to the upper end of the container contains all or part of the valve body. The latter contains a hole for the valve slide and two chambers open to this bore, one of which (first) is in connection with the valve inlet stands. The other chamber is designed as an annular chamber and preferably contains a seal surrounding the valve slide a boot seal. Furthermore, a labyrinth or throttle seal, for example a slide seal, is also arranged around the valve slide in the area between the two chambers, so that a filler flow that occurs when the valve is closed Valve through the filler pressure at the valve inlet on the valve slide could occur along is prevented from doing so by first being substantially throttled by the throttle seal and is then stopped properly by the subsequent seal.

Optionally, said housing can have a valve body be provided receiving bore, this one axial central bore for the valve slide and three axially from each other Contains separate annular chambers. With regard to the bore of the valve slide, the three annular chambers are coaxial and represent radial extensions of the bore. The middle one of these three Annular chambers are connected to the valve inlet, while the other two chambers are each at one end of the valve housing

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• are trained. Each of these two outer annular chambers contains a sealing sleeve, the wall of the valve slide bore a slide seal in the area between the central annular chamber and the annular chamber connected to the valve outlet forms. Due to the filler pressure at the valve inlet when the valve is closed Valve is effectively prevented from penetration of filler creeping along the valve slide by the filler, is first throttled by the slide seal and completely held back by the subsequent sleeve seal.

In a particularly expedient design according to the invention, the housing serves as a guide for a piston rod W which is fastened to the piston and protrudes from the housing on the guide and is provided with a stop on its protruding part, which the movement. the piston rod in the housing, ie the piston movement in the housing, is limited. Furthermore, the piston rod is forked at its part located in the housing in that it is provided with two radial projections axially separated with respect to the piston rod, one of which is both a force-transmitting support for the spring elements acting on the piston and the tilting device for the purpose of opening the valve controls while the other projection operates the tilting device so that the valve is closed.

The valve control consists of the mentioned tilting device, the under the action of the piston movement, the necessary energy in a spring stores, which is then used to open or close the valve. When the tilting device has an (unstable) equilibrium position is reached, the valve is closed by this spring force, adjusted, i.e. open or closed «

In a particularly simple and operationally reliable type of the inventive The device contains the tilting device a spring provided with a guide for storing the adjustment of the valve required work and an angle lever rotatably mounted in the housing, one arm of which is connected via a coupling member with the spring guide and the other arm with both the

2098 09/1017

Piston rod is in operative connection with a slide driver coupled to the valve slide. When the piston is down moves, it tensions the spring of the tilting device by transmitting movement via the angle lever, the coupling link and the spring guide, namely until this limb reaches an unstable equilibrium position, the spring energy is triggered and over the spring guide, the link and the angle lever adjusts the valve.

The piston movement has been found to be particularly advantageous to limit with a stop designed in such a way that this a considerable further movement of the piston after opening the Valve allowed. This gives a reserve of lubricant which, if there is no lubricant supply to the container, the Can continue to supply lubricant to the lubricator for a while.

According to the invention this is achieved in that the stop on The position of the piston rod is such that when the valve is open and there is no filler supply, it allows the piston to move over to move out that position that corresponds to the minimum amount in the container mentioned earlier, so that there is a reserve volume in the Container can be claimed. That radial projection of the fork, which also acts as a support for the spring organs of the piston is dimensioned so that, when the valve is open, it moves in the opening or closing direction after it (the projection) has come into engagement with a part at one end of the bell crank, it engages with this engaging part can move past so that the specified reserve quantity can be used or a reserve quantity can be refilled, when the filler supply works.

It may also be useful to set up a War-n-Kontakt to be provided on the housing, which has a movable switch lever. When the reserve amount is used, press a on the piston rod provided cam this lever so that the

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Warning contact emits a signal, which indicates that the container is full is too low.

An exemplary embodiment of the invention shown in the accompanying drawings is described below.

Figure 1 of the drawings is a schematic longitudinal section of the device. Fig. 2 is a right-angled longitudinal section of the same device. Fig. 3 is a composite longitudinal section, the right part of which shows the position of the tilting device (as seen in Fig. 2) when the valve is closed and the container is filled with lubricant, and the left part of which shows the position of the valve (as seen in Fig . 1) shows under the same conditions. Fig. K shows the same as Fig. 3 when the minimum quantity in the container is reached and the valve should open. Fig. 5 also shows the same in the same way as Fig. 3j when the valve is open and lubricant can be added to the container. Fig. 6 also shows the same as Fig. 3, when the maximum amount has been reached and the valve should close. Fig. 7 shows an optionally different embodiment of the connection between the valve outlet and the container.

The container 1 is connected at its lower end to the lubricant-consuming lubricant device A and is provided at its upper end with a cover 2 in which the housing 6 of the valve Z controlling the lubricant supply to the container 1 is fastened. The lid 2 is in turn fastened to the container with nuts 32. A sealing ring 33 is located between the cover 2 and the container 1. A piston 3 is axially movable in the container and is sealed against the container by a piston seal k. A piston rod 5, the upper end of which is movably supported in the housing 6, is fastened to the piston h. A fork 7 is attached to the lower end of the piston rod 5. The piston, piston rod and fork are held together by a nut 3 ^. A spring 9 tries to push the piston 3 and the fork 7 downwards. The downward movement of the piston 3 and fork 7

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■ is limited by a stop B at the top of the piston rod 5 when this stop B hits the housing 6. The fork 7 has the task of tilting a tilting device C when the piston 3 is moved up or down. The tilting device C consists essentially of an angle lever 11 which is rotatable about an axis 12 attached to the valve housing 6 and a spring 13 acts on its right lever arm, the force of which is transmitted by a spring guide lh and a coupling member 15. On the spring guide I ¹ + and on the angle lever 11 are each an axis 16 and 17 are attached, which are articulated by the member 15 to each other. The left arm of the angle lever carries a roller 18 and a fixed pin 19, the roller 18 being mounted on a stub shaft 20 attached to the angle lever. The pin 19 runs in a groove or groove D of a slide driver 21 and can move it upwards or downwards by stopping against the end faces E and F when the tilting device C is tilted by the movement of the piston 3. The upward movement of the slide driver is limited by its end face G, namely when it lies against a type of cover plate 22. The downward movement of the slide driver 21 is limited by the abutment of a collar H of the same against a surface J belonging to the valve housing 6. The valve Z is installed in the valve housing above the slide driver. It consists of the valve body 23, two sealing collars 29 and 30, the cover 22, a further cover 2h and the slide 26. The valve body 23 and the upper cover 2h are held in the valve housing 6 by an annular nut 25. The slide 26, which is longitudinally movable in the valve body 23, is in operative connection with the driver 21 in that the head K of the slide engages in a T-groove in the end part of the driver, whereby the slide follows the longitudinal movements of the slide driver in both directions. The lubricant is fed to the slide through channels M and N to the annular groove 0 in the valve body. Two sealing rings 27 and 28 with a round cross-section prevent leakage from the inlet channel »

The task of the valve Z is the connection between the ring groove 0 and the space marked R to open and close

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block in order to thereby close the lubricant supply to the device steer. The space H on the outlet side of the valve is with the Connected container space S, either by a pipe 31 according to 'Fig. 1 or by a hose 10 and a hole in the piston rod 5 according to Fig. 7. The latter connection has the Advantage that the lubricant is fed to the container space S at the top and to the container at the bottom approximately at 38 by pumping it out to the lubricating device is taken, whereby the lubricant conversion in space S is improved.

The valve Z has two seals, namely a slide seal P sew the annular groove 0 and then a sleeve seal 30, the a seal between the slide 26 and the valve body 23 causes. Another cuff seal 29 is in the vicinity of the provided at the lower end of the slide.

The slide seal P serves to almost completely shut off a lubricant transfer from the annular groove 0 into the space V and therefore forms a pre-seal during the movement in which the slide is pushed through the sleeve 30 or pulled out of it. During this movement, the pressure in space V must not be too high at the moment when the slide enters the sleeve when it is pushed in or exits it when it is pulled out, because the inner lip of the sleeve does not rest against the slide in these slide positions. If the pressure in space V is too high on these occasions, the inner sleeve lip above the slide could be bent inwards and damaged in the process, whereby the shut-off ability of the valve would cease and the device would no longer be operational. But since the lubricant supply to space V is almost completely blocked by the slide seal P and the slide movement is transmitted abruptly to the slide 26 by the spring-controlled tilting movement of the tilting device C _? held in space V during the critical part of the slide movement at a 'limited low value.

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The space between the piston 3 and. the lid 2 is through the Filter 35 vented.

On the piston rod 5 there is a cam T ₉ which controls the roller 36 of the warning clock 37 and, depending on the position of the piston 3, brings it into a certain position. The warning contact 37 is fastened to the housing 6 with screws 8.

The device described above works as follows. When the container 1 is full, the various components assume the positions shown in Figs. 1-3. The supply lines M and N as well as the annular groove 0 are under pressure, which can be 350- ^ fOO atmospheres at times. The valve Z is closed and prevents a supply of lubricant to the container space S. The pressure slowly propagates through the slide seal P into the space V, but is prevented from further propagating by the sleeve 30, as this forms a complete seal between the slide 26 and the valve body 23 effects. If the lubricant consumes lubricant after it has been removed from the container, the piston 3 is pressed down by the spring, the force of which reaches the piston via the fork 7, and this movement is supported by the negative pressure that is created under the piston as a result of the removal of lubricant. During this downward movement, the upper leg X of the fork 7 moves down until it rests against the roller 18 of the angle lever 11. With continued piston movement, the angle lever 11 rotates to the left, ie counterclockwise, the spring I3 is compressed with the aid of the coupling member 15 and the spring guide lh- and as a result stores the work required to adjust the slide 26. During the rotary movement of the lever 11, the pin 19 leaves the surface E of the slide driver 21 and moves in the groove D in the direction of the surface F. Slide and slide driver are held in their existing position by the friction between the sleeve seals 29, 30 on the one hand and the slide 26 on the other hand in their position. If the angle lever under the action of the piston movement leads to the unstable equilibrium position according to Fig. K

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has exceeded, the lever is quickly pressed by the spring I3 into the position shown in Fig. 5. ' Here, the contact between the EoHe 18 and the fork leg X stops. The pencil. 19. Then lies against the surface F of the slide driver 21 and presses the latter downwards until the surface H of the driver lies against the surface J of the housing 6. The slide 26 coupled to the driver follows this downward movement and opens the connection between the annular groove 0 and the space R ₉ so that lubricant from the annular groove 0 through the opening A (Fig. 5), the sleeve 30 and the space R into the container space S flows. As a result, the piston 3 is gradually pushed upwards and tensions the compression spring 9. During this movement, the fork leg Y reaches the roller 18. With further piston movement upwards, the angle lever is rotated clockwise, the spring 13 being compressed with the aid of the spring guide Ik and the coupling member 15 and thereby saves enough work to adjust the slide 26. During the lever movement, the contact between the pin 19 and the surface F of the driver 21 ceases, and the pin 19 moves upwards towards the surface E in the rage D. . _ -.

The slide and its driver remain as a result of between the Sealing collars 29 and 30 on the one hand and the slide 26 on the other hand are the prevailing friction. When the bell crank under the influence of the piston movement the unstable equilibrium has exceeded the position shown in Fig. 6, the lever is quickly adjusted to the position shown in Fig. 3 by the spring I3, wherein the roller 18 leaves the fork leg Y. The pin 19 reaches the surface G of the driver 21 and pushes the latter after up until the surface G of the driver abuts against the cover 22-The Slide 2.6, which is moved along by the driver, follows this movement and blocks the connection between the annular groove 0 and the space R, whereby the supply of lubricant to the container space S is interrupted will. The container is now full, and if you continue Withdrawal of lubricant repeat the above procedures.

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In case the lubricant supply does not work when the slide 26 releases the connection between the supply line and the space S, the piston 3 ′ continues to move downward until the stop hits its piston rod 5 reaches the housing 6. Located in the container therefore a reserve of lubricant that can be used without human intervention is automatically used when the lubricant supply to the device is temporarily or permanently disrupted. Around To enable additional piston movement, the fork leg X is dimensioned so that it moves up or down when it moves runs past the roller l8 when the valve is open and the angle lever is in the position shown in Fig. 5. If the Piston 3 passes through the position during downward movement in which the valve releases the supply of lubricant to the container space S is the warning contact 37 is actuated by the cam T, the roller 36 of the Pushes away the warning contact. The warning contact is adjusted and remains in its new position during the further downward movement of the piston. The warning contact is connected to a warning device, that in the latter position of the warning contact 37 indicates that the container space S does not contain enough lubricant and that the lubricant reserve has been used. When the container is refilled, the warning contact is activated by spring force reset as soon as the cam T releases the roller 36 during the upward movement of the piston, whereby the warning signal stops. This occurs when the container space S again contains approximately the same amount of lubricant as when the was switched on Warning sign.

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Claims (1)

Aktiebolaget Ässa, . . Atvidaberg, Sweden. Claims Wax filling device for automatic regulation of the wax filling a container with a filler, preferably with a lubricant, which filler removed from the container and a or several consumers is supplied, with a valve the Controls the filler supply to the container and with its outlet the container is in communication, and wherein the filler is supplied to the valve inlet under pressure, characterized in that an axially movable in the valve body (23) Valve slide (21) controls valve (Z) by creating a connection channel between the inlet and outlet of the valve when the valve is open Releases the valve and closes this channel when the valve is closed and is controlled via a tilting device (C) by a piston (3) which is movable in the container (1) and which is spring-loaded (9) is pressed against the filler present in the container, so that the position of the piston is a measure of the amount present in the container Is the amount of filler, with the tilting device (C) causing the valve to open and close quickly and clearly, so that the valve opens when the amount of filler in the container falls below a specified minimum or closes when the amount of filler available exceeds a specified maximum. 2. Device according to claim 1 with a housing which is in or is attached to a wall of the container, preferably in a lid at the upper end of the container, characterized in that the housing (6) wholly or partially the The valve body (23) contains a hole for the valve slide (26) and two chambers (0, V) open to this hole contains, of which one (first) is in communication with the valve inlet (N) and the other (V) is designed as an annular chamber, which surrounds the valve slide, preferably as a sleeve 209809/1017 seal (30), and that a throttle seal (P), for example designed as a slide seal, surrounds the valve slide (26) in the area between the two chambers (O ₅ V), so that when the valve is closed due to the filler pressure at the valve inlet on the valve slide is prevented from penetrating along the infiltration by the throttle seal ("P) essentially throttled first and then completely stopped by the following seal (30). 3. Device according to claim 1 with a housing which in or is attached to the wall of the container, preferably in a lid at the upper end of the container, characterized in that the housing has a bore for the valve body (23) is provided, which has an axial central bore for the valve slide (26) and three axially separated annular chambers - (Vj0, V) contains, which is coaxial with said central bore and radial extensions of the same form that the middle (0) of the three annular chambers is in communication with the valve inlet (N) says that the other two annular chambers are close each are provided at one end of the valve body, one of which is in communication with the valve outlet and both of which are each a sleeve seal (29,30) included, and that the wall of the valve slide bore a slide seal in the area between the central annular chamber (0) and the annular chamber connected to the valve outlet (P) forms in order to prevent possible ingress of To prevent filler along the valve slide properly by infiltrating filler first essentially through the Slide seal (P) throttled and then from the following Cuff seal is completely shut off. k. Device according to one of claims I-3, characterized in that the housing (6) is provided with a guide for a piston rod (5) fastened to the piston (3) which extends outward on the guide through the housing 209809/1017 Ik extends and on its part located outside the housing has a stop (B) which limits the movement of the piston rod and thus that of the piston in the container (1) and that the part of the piston rod located inside the container has a fork (7) with two in With respect to the piston rod radially protruding and axially spaced parts (X ₅ Y), of which one part (X) forms a force-transmitting support for the suspension (9) acting on the piston and the tilting device (C) in the valve-opening direction operated, while the other fork part (Y) operates the tilting device in the valve-closing direction. 5. 'means characterized ge according to any one of claims 1- ¹ ^ ₅ - w indicates that the tilting device (C) one with a guide (lh) provided with spring (I3) of the work required for moving the valve and for storing in said housing rotatably mounted angle lever (11), one lever arm of which is connected to the spring guide (lk) via a coupling member (15) and the other lever arm in operative connection both with the piston rod (5) and with a valve slide (26) moving slide driver (21), the piston during its movement tensions the spring (I3) of the tilting device via the angle lever, the coupling member and the spring guide until the coupling member reaches an unstable equilibrium position, the stored spring work being triggered and the spring guide the Coupling member (15) and the angle lever (11) the valve quickly adjusted, i.e. opens or closes. 6. Device according to claim h or 5, characterized in that the stop (B) is located at such a point on the piston rod (5) that when the valve is open and the supply of filler is interrupted, it enables the piston to meet the minimum fill quantity in the container ( 1) to go through the corresponding point, so that a reserve amount of filler can be used in the container, and that that radially protruding fork part (X), which is also the "force-transmitting support of the 209809/10 1 7 Piston suspension forms when the valve is open during its movement in the opening or closing direction, after engagement with a part (18) at one end of the angle lever (11) and after adjustment of the angle lever can run past this engagement part (18), so that the filler reserve is used or, if the filler supply is functioning, a reserve is topped up can be. 7. Device according to claim 6, characterized in that that on the housing (6) a warning contact (37) with one of the same controlling arm (at 36) is attached j which arm is in use the reserve fill quantity is actuated by a cam (T) attached to the piston rod (5) and a signal is generated which indicates that the container does not contain enough filler. 8. Device according to one of the preceding claims, characterized marked that the valve outlet with the container interior (S) is connected via a line (3I) which opens into the container at a point never accessible by the piston (3). 9. 'Device according to one of claims 1-7, characterized in that the piston rod (5) has a continuous Axial bore contains the one facing the filler Piston end face opens, and that the valve outlet is connected to the container via a flexible line (10) which at the end of the piston rod outside the container (5) is connected to the bore so that when the container is upright, the filler is fed to the container at the top, the The filling agent outlet of the container is preferably mounted at or near the bottom thereof. 9 / 1017-