FR2659442A3 - PROCESS AND EQUIPMENT FOR WEIGHING A PRODUCT. - Google Patents

Abstract

To weigh the quantity of a liquid binder, contained in a tank (13) arranged on a movable support (11), on which it is mounted essentially without transverse force, in the longitudinal and transverse direction at least, weighing elements ( 15 - 18) are placed between the support and the tank. During operation, the tank is clamped firmly, and permanently, against the weighing elements, and assembled to the support, by means of adjustable pneumatic cylinders, provided between the support and the tank. For the weighing when the support is stopped, the tank, which rests on the weighing elements, is released by the release of the junction devices. The equipment saves on components, and leads to simplification, and to a reduction in weight and costs. It is possible to weigh the entire vehicle (10) on a normal path, provided that the latter is not too oblique.

Description

Method and equipment for weighing a product.

  The present invention relates to a method for weighing a product, a bulk product in particular, a liquid, a liquid binder, for example bitumen, or the like, contained in a tank, which can be disposed on a mobile support, on which it can be essentially mounted, to

  weighing operation, without transverse force and without mo-

  ment, at least in the longitudinal and transverse direction, at least one weighing element being placed between the support and the reservoir. Related to a weighing problem, namely the weighing of a liquid binder, for example of bitumen, of vehicles for spreading road belts, which consist of a chassis

  as a support, a tank as a tank, and a system

  spray teme, are already known, the objective being to determine the consumption of bitumen during the various

  work process, because the quantity consumed is easy-

  counted down, for example With these known devices, which have weighing elements between the support and the tank, the latter is lifted from the weighing elements for running the vehicle, and is held and anchored mechanically in this position The weighing elements do not are therefore not

  stressed during operation For weighing, it is essential

  thinkable to first align the vehicle mount in a

  horizontal plane, by means of elevating pistons

  Tying, that is to say "leveling" The support with the load It is necessary by ai L Their unlock The tank in the re position Lifting relative to the weighing elements and the support, Lower it, into the ground Thus requesting the weighing elements It is obvious that this method, as well as the vehicle equipment, required for this purpose, are expensive,

  complex and expensive On the vehicle side, a special Levant bridge

  Lier, fitted with lifting pistons, and a corresponding device

  laying upgrade, are essential This means

  significant mechanical expenses and high costs.

  The activation of the Levant bridge for leveling the support with the tank also entails considerable expenditure,

  operator-dependent precision, and reproducibility

  therefore not necessarily guaranteed Another disadvantage

  deny lies in the duration of the upgrade given

  that the tank with its contents, for the running of the vehicle

  cule, must be lifted from the support, weighing elements in particular, be brought into a release position, and be supported and locked in this position, this also results in expensive mechanics, drives and control including Overall, a such equipment, already known, is therefore expensive, heavy and complex It requires long-term work The objective of the invention is to remedy these drawbacks, for the problems of weighing a product

  mainly, a bulk product in particular, a li-

quide, or others.

  The invention aims to create a method as defined above,

  whose implementation is simplified, at lower cost.

  With a method of the type described above, this objective is achieved, in accordance with the invention, by the fact that the

  tank, while the vehicle is running, is tightly closed

  permanently, against at least one weighing element, and assembled to the support, by adjustable joining devices, provided between the support and the reservoir, and by the fact that the reservoir, resting on at least one weighing element , is released by the loosening of the

  junction, for weighing when the support stops.

  The tightening, firm and permanent, of the reservoir against at least one weighing element, its retention on the support in

  this position, while the vehicle is running, and its

  gage for weighing when the support is stopped, so that this tank rests freely on at least one weighing element, make it possible to reduce the mechanical expenses and the costs required for the equipment A special mechanism for lifting the tank before the the vehicle, and to block it in the lifting position, is deleted, with

  the corresponding drives and control devices.

  The adjustable junction devices, designed to replace

  which represent traction devices, and

  put to block the tank against the support and against at least one weighing element, on the other hand are much simpler The command required for this purpose, too, is essentially simplified In the simplest case,

  such joining devices are represented by cylinders

  tires, acting as traction cylinders,

  which are activated with compressed air to block the tank

  see, and deaerated for its release It suffices, for this

  effect, with a simple reversing valve Mechanical expenditure

  weight, and costs are thus significantly reduced.

  The invention simplifies the weighing of any product, a bulk product, for example, liquids, or the like.

  While the vehicle is running, the tank is advantageous-

  assembled to the support in a fixed unit, under stress

at least one weighing element.

  A good solution is to tighten the tank

  during the step, in a firm and permanent manner, against at least one weighing element, and to assemble it to the support, with

  a force greater than the weight of the tank, filled to the maximum

  mum, and the shock and impact forces exerted during the

vehicle running.

  In a preferential measure, the tank is blocked on the support, while the vehicle is running, with a force of the order of one tonne per weighing element, of four tonnes

in total, for example.

  The invention also relates to equipment for weighing a product, in particular a bulk product, a liquid,

  a liquid binder, bitumen for example, or others, containing

  naked in a tank, which can be placed on a mobile support, on which it can be essentially mounted, for

  weighing operation, without transverse force and without mo-

  ment, at least in the longitudinal and transverse direction, at least one weighing element being placed between the support and the reservoir, this equipment being provided, in particular, for carrying out the process according to the invention. The objective of this equipment, which is the same as that defined for the

  process, in the introduction, is achieved by the fact that more

  several weighing elements, four for example, are arranged between the support and the tank, and these elements are stressed during the running of the vehicle, and during weighing,

in the weighing direction.

  In a judicious form of construction, adjustable junction devices are provided between the reservoir and the support, these devices making it possible to clamp the reservoir against the weighing elements, during operation, or to

  clear, for the weighing operation.

  The joining devices preferably consist of individual driving cylinders, supplied with a pressurized fluid, these cylinders advantageously being in the form of traction cylinders, which clamp the reservoir, in the direction of traction and against the weighing elements. , and

release it in the opposite direction.

  A wise solution is to make the cylinders

  engines in the form of pneumatic cylinders.

  In another advantageous form of construction, a provision

  mechanical safety device, which makes it possible to mechanically fix the reservoir on the support, against any risk of re-lifting, is provided between the two aforementioned components This device consists of an axis on one part, on the support for example, and by pressing on the other part, on the tank for example, crossed by the axis with a certain clearance, and on which the axis can abut, via

a counter-support.

  A preferential measure consists of providing four elements

  Weights, arranged in the corners of a rectangle.

  The mechanical safety device, in accordance with the invention, is simple, uncomplicated, and inexpensive. It represents additional safety in the case where the supply of compressed air is cut off for activated junction devices, for pneumatic cylinders. , for example, the tank may then rise during the journey,

  in relation to the weighing elements and the support

  junction devices have such a dimensioning that the

  see is blocked on the support, while the vehicle is running

  tipping, with a force of the order of one tonne per weighing element, of four tons in total for four weighing elements, for example This force is greater than the total weight of the tank, filled to the maximum, and the possible forces of additional shock and impact, exerted while the vehicle is running, the subsequent stressing of the weighing elements remaining, however, within the scope of the measurement, and not being, for example, at the upper limit of the latter This measurement excludes any risk of constraint of the weighing elements by impact and impact forces, during operation A unit, fixed in itself, of the

  tank with its contents, up to the support, is at the con-

  milking guaranteed by this blocking of the tank

  weighed are therefore spared, because any constraints

  your oscillations are completely excluded.

  In another preferred form of construction, weighing equipment, containing the weighing elements,

  has a level switch, which automatically disconnects

  only the above-mentioned equipment and interrupts the weighing, to

  excessive obliquity of the support when stopped, with the

  see This measurement guarantees a reproducible weighing, without

  that the operator does not have to level the support, with the

  that it supports A lifting bridge fitted with pistons

  elevators, such as long leveling work, preliminary

  Mining weighing, are therefore superfluous Not only the mechanical expenses, the weight, and the costs, are thereby reduced, but the whole weighing operation is essentially simplified and accelerated The operator does not have to worry about knowing , if the vehicle is on a sufficient seat

  plane If the weighing equipment does not work, the operation

  The driver deduces that the vehicle is too oblique, and that it must be driven on a more level surface

  weighing equipment works, vehicle is sufficient

quite level.

  Another good solution is that the weighing equipment has a walk recorder, which detects movement

  or stopping support, automatically disconnects the team-

  weighing while walking, and interrupts the weighing operation This recorder is judiciously produced in the form of radar equipment, oriented on the surface As a result of this measurement, the weighing is actually only carried out

  stopping the vehicle, while being reproducible and independent

  of any operator activity When the vehicle is moving, the weighing equipment is automatically disconnected by the walk recorder, and the weighing

is interrupted.

  A preferential measure consists in providing at least one reference body, of a predefined weight, on the reservoir, and an additional weighing device, disposed between the reference body and the support, and assigned to the reference body, which it allows to measure the weight The weighing device is then connected to the weighing equipment by a control system, which proceeds to a digital adaptation of the weighing results of the equipment, according to the obliquity of the support and the tank, determined by the weighing device This measurement offers an advantageous alternative to disconnection by the level switch, for excessive obliquity When the support is located on a flat surface, the reference body, whose weight is known, means that the weighing device, which is assigned to it, precisely determines this known weight But if The

  support, with the elements above, is located at L'obli-

  that a different weight is weighed by the device, assigned to the reference body The deviation from the known weight of the reference body represents a measure for the digital correction of the whole weighing result IL is thus obtained reproducible and accurate results,

  even for relatively large obliquities.

  In another advantageous form of construction, an arm

  osci L Lant front and an osci L Lant rear arm are respectively

  vement mounted on the support by one end, on the tank by the other end, and can pivot about an axis roughly parallel to the longitudinal axis of the support. In a final preferred measurement, a longitudinal swing arm is provided on one longitudinal side, and another longitudinal swing arm on the opposite side of the support, these arms being respectively mounted on the tank by one end, on the support by the other end , and

  able to pivot about an axis transverse to the longitu-

dina L of the support.

  The weighing equipment, in accordance with the invention, makes it possible to weigh all the possible products, bulk products, for example, liquids, including, among other things, liquid binders, such as bitumen, or others The process and the equipment according to the invention are not limited to particular products. By adaptation, the tank can be composed

  a tank, container, open tank, or

  very. Other details and advantages of the invention result from the

description below.

  The invention will be better understood using the construction examples, shown in the accompanying drawings, which correspond to: Figure 1: a schematic side view of a vehicle, with a tank and weighing equipment, Figure 2: a schematic top view of the vehicle of Figure 1, Figure 3: a schematic section, in side view, in the direction of arrow III III of Figure 1, Figure 4: an enlarged schematic section, in side view, along the line IV IV of Figure 2, Figure 5: a schematic projection of the vehicle weighing equipment of Figure 1, Figure 6: a schematic side view of a device for

  weighed, with a reference body on the tank

see.

  The vehicle 10, shown diagrammatically, is of a suitable embodiment

  tional in its basic components It has a support 11, simply shown diagrammatically, produced in the form of a chassis, for example, and can roll using the wheels 12,

  mounted on this support A removable reservoir 13, for example

  ple, that is to say interchangeable, produced in the form of a container, tank, tank, or the like, is placed on the support 11 of the vehicle 10 The tank 13 contains any product to be weighed, a bulk product for example, a liquid, or others, a liquid binder in this example of

  construction, especially bitumen Instead of being interchangeable

  geable, the reservoir 13 can be fixed on the support 11 of the

  vehicle On the end, right in Figure 1, that is

  say rear, vehicle 10 can also be equipped

  of a conventional spraying system, not shown.

  In this version, the vehicle 10 is suitable for spreading road belts To determine the consumption of sprayed liquid binder, weighing equipment, electromechanical for example, generally referenced by 14, makes it possible to establish the consumption of bitumen In this version , a weighing is

  assured before the work process, then after the pro-

  cessus The resulting weight difference being a

  reproducible measurement of the quantity of liquid binder sprayed

  laughed, it is possible to establish exactly the consumption of binder Then the count can be made, for example It is then possible to establish, in a reproducible manner, the quantity of binder spread on such or such traversed trajectory. The reservoir 13 can also be a removable and interchangeable constituent of the vehicle 10, like a container. It is filled in the factory with liquid binder, for example, of bitumen in particular, then transported to the desired site, where it can

  be placed and fixed on a waiting vehicle 10 Activation

  tion of the weighing equipment 14 makes it possible to weigh, that is to say

  say to determine, the amount of liquid binder contained

  in the reservoir 13, before the working process.

  The reservoir 13 is housed on the support 11, so as to be essentially free of transverse forces and

  moments During weighing, in the longitudinal and transverse direction

  versal at least The weighing equipment 14 has at least one weighing element, simply shown, arranged in the flow of forces between the reservoir 13 and the support 11 In total, four similar weighing elements 15 to 18, placed in the corners of a rectangle, are provided in this construction example Weighing elements 15 to 18 consist of measuring cells, which include gauges

  of constraint and operate according to this method.

  In another example of construction, not shown, the four weighing elements 15 to 18 are replaced by six elements The weighing elements 15 to 18 are located in the flow of forces between the reservoir 13 and the support 11 They are constantly stressed in the weighing direction The transmission of forces between the reservoir 13 and the respective weighing element 15 to 18 is ensured by shock absorbers, which absorb shocks. Such an anti-vibration plate 19 is visible on the weighing element 15 of the figure. 4 Each weighing element 15 to 18 is protected by a bellows 20, which envelops it.

  All available weighing elements 15 to 18 are stressed.

  tees in the weighing direction, while the vehicle is running, as when it is stopped and the weighing operation A

  possible detachment of the reservoir 13, relative to the elements

  weighing elements 15 to 18, in the opposite direction to the weighing direction, is prohibited, even while the vehicle is running 10 Adjustable junction devices are provided for this purpose between the tank 13 and the support 11, these devices being only roughed out , for clarity, than in Figure 5,

  in the only area of one of the longitudinal sides of the vehicle

  cule, in the vicinity of the local weighing elements 15 and / or 16.

  These visible joining devices are referenced by 21, 22 in FIG. 5 It goes without saying that similar joining devices are provided, in the same manner as in January 1 in FIG. 5, on the other longitudinal side of the support 11, o

  they are assigned to the weighing elements 17, 18 These devices

  adjustable connecting points 21, 22 allow the tank 13 to be clamped against the weighing elements 15, 16, down in FIG. 5, while the vehicle 10 is running, or to be released sufficiently, for the weighing when stationary of the vehicle, so that it rests on the support 11, without transverse force and without moment, so that the whole of the reservoir 13, with its content, urges the elements of

  weighing 15 to 18, also in the weighing direction, i.e.

  say down in Figure 5, and that the operation of

weighing is permitted.

  The individual adjustable joining devices 21, 22 are composed of engine cylinders supplied with a fluid under

  pressure, these cylinders being produced in the form of a cylinder

  dres de traction, which block the reservoir 13 in the direction of traction, against the weighing elements 15 to 18, and the

  free in opposite direction It can be advantageous, no-

  much, to realize these junction devices 21, 22 under

  compressed air cylinders (pneumatic cylinders).

  Individual swing arms allow the reservoir 13 to be supported on the support 11, without transverse force and without moment, essentially A front swing arm 23 and a rear swing arm 24 are thus provided, these arms being respectively mounted by one end on the support 11 , and by the other end on the reservoir 13, with a

  possibility of pivoting about an axis roughly

  parallel to the longitudinal axis 25 of the support 11 A longitudinal swing arm 26 and / or 27 is also provided on each longitudinal side of the support 11 The longitudinal swing arms 26, 27 are respectively mounted on the reservoir 13 by one end, on the support 11 by

  the other end, and can pivot around a trans-

transverse to the longitudinal axis 25.

  A mechanical safety device 28, simply diagrammatically

  se in FIG. 5, is provided between the reservoir 13 and the support 11 While the vehicle is running, and when the reservoir 13 is blocked by the junction devices 21, 22 against the weighing elements 15, 18 and the support 11, this

  safety device provides additional mechanical fixing

  of the reservoir 13 on the support 11, in the same direction, against any risk of detachment upwards The device 28 has an axis 29 on one part, on the support 11 for example, and a support 30 on the other part, on the reservoir 13 for example, crossed with a certain clearance by the axis 29, a counter-support 31, maintained on the axis 29 with a possibility of adjustment, which may abut on the support, in the event of a lack of compressed air for the junction devices 21, represented by pneumatic cylinders.

  The block diagram of FIG. 5 also represents

  very weighing equipment components 14 The latter

  comprises an electronic part 32, equipped with a printer

  te, and a housing 33, connected to the measurement cells Un

  print trigger 34 is connected to the electrical part

taper 32.

  The weighing equipment 14 is moreover provided with an in-

  level 35 breaker, simply diagrammed, which

  automatically connects the equipment 14, and therefore interrupts the weighing, for an excessive obliquity of the support 11 when stopped, with the tank 13 It is therefore not absolutely essential to drive the vehicle 10, for the operation

  weighing, on a known plane and as horizontal as possible.

  The weighing can be initiated, on the contrary, on any ground, on a road, or other If the bearing surface of the vehicle 10 is too oblique, the weighing equipment 14 is automatically disconnected by the switch level 35, so the operator does not have to watch,

  itself, at an alignment sufficiently flat for weighing.

  It is possible, for example, to adjust the equipment of

  weighing 14, so that the level switch 35 provo-

  that its disconnection for an obliquity of the vehicle 10 of more than 2.5, for example, that is to say of the order of 4.4% In the electronic part 32, the display, with the symbols of units, can be simultaneously obscured, using an electrical level, for example, or others, the printer

being otherwise locked.

  The weighing equipment 14 also has an embodiment such that the electronic part 32, with the printer, is also locked automatically, in the same way as by the level switch 35, when the devices

  junction 21, 22, represented by the pneumatic cylinders

  ques, for example, block and maintain the reservoir 13, in the weighing direction, against the weighing elements 15 to 18 In this state, which generally corresponds to the running of the vehicle, any weighing operation is therefore also impossible.

  The weighing equipment 14 also presents a record

  gait 36, simply shown, done under

  form of radar and surface oriented equipment 37.

  The walking recorder 36 is connected to the electronic part.

  that 32 by a command 38, shown diagrammatically, provided with a speed control The recorder 36 detects the starting or stopping of the vehicle 10, and causes the automatic disconnection of

  the weighing equipment 14, in the event of the vehicle running.

  A reference body 39, at least, disposed on the reservoir 13, and of a known predefined weight, is shown diagrammatically in FIG. 6 An additional weighing device 40, provided

  between the reference body 39 and the support 11, for example

  ple, is assigned to the body 39, the weight of which it allows to measure. The weighing device 40 is connected in a way

  not shown, to the weighing equipment 14, via

  diary of a control system, which can carry out a digital adaptation of the weighing results of the Equipment 14, as a function of the obliquity of the support 11 and of the reservoir 13, determined by the weighing device 40 In this case, the level switch 35 is short-circuited By means of the reference body 39 and the weighing device 40, which is assigned to it, i L is therefore possible to carry out the weighing, also on relatively large inclinations If the vehicle 10 is located on relatively steep slopes, the

  weighing device 40 determines a weight of the reference body

  rence 39, different from the weight obtained for a completely flat terrain appearance The difference is a measure of the digital correction to be made, which can be ensured by

  the weighing equipment 14, for this weighing operation.

  The assembly described therefore makes it possible to tighten, while the vehicle is running, firmly and permanently, the reservoir 13 against the weighing elements 15 to 18, by means of adjustable joining devices 21, 22, represented, for example, by the pneumatic cylinders between the support 11 and the reservoir 13, so that the reservoir 13 cannot be lifted

  weighing elements 15 to 18 The dimensioning of the

  junction elements 21, 22 is such that the reservoir 13 is blocked on the support 11 by a force of the order of four

  tonnes in total, i.e. about one tonne per item

  Weighing 15 to 18 While the vehicle is running, the tank 13 is therefore tightened firmly, and permanently, against the weighing elements 15 to 18, and assembled to the support 11, by a force greater than the weight of the tank 13,

  filled to the maximum, and to shock and impact forces, exert-

  created during vehicle operation During operation, the tank 13 is therefore assembled to the support 11 in one unit

  fixed, under constraint of all weighing elements 15 to 18.

  It goes without saying that the weighing elements 15 to 18 are not stressed to their upper limit, but that this

  constraint lies in the field of work of these ele

  elements 15 18 For weighing, the vehicle 10 is stopped, and each joining device 21, 22, in the form of a pneumatic cylinder, for example Le, is deaerated, so that the reservoir 13, which rests on the elements weighing 15

at 18, is cleared for weighing.

  Compared with known methods and systems, the weighing equipment and method according to the invention have

  The following advantages While a particular Levant bridge

  link, fitted with lifting pistons, is required on the vehicle side in other systems, to level the vehicle by

  exit of the pistons, before weighing when stationary, such components

  particular mechanical health is superfluous, with, in cons

  sequence, simplification, reduction in weight and lower costs Mandatory lifting of the tank, in the opposite direction to the weighing direction, relative to the weighing elements, its mechanical locking and its maintenance in this position, while the vehicle is running, are also deleted All mechanical elements, required for this purpose, are therefore unnecessary, which leads to further simplification, reduction in weight and costs Un

  particular leveling for weighing is also super

  flu, a simplification and a saving of time, in particular, are also obtained on this point In addition, the design of the equipment is such, that it also lends itself to tanks 13, handled in the manner of containers, in the form transport bins, containing a liquid binder, in particular bitumen, and which can be mounted on the support 11 of the vehicle 10, waiting on site, in a removable and interchangeable manner, the amount of binder, contained in the tank 13, which can be weighed on site, before the working process, and after, in order to determine consumption.

Claims (16)

Claims.   1 Method for weighing a product, in particular a bulk product, a liquid, a liquid binder, for example bitumen, or the like, contained in a tank (13), which can be placed on a mobile support (11), on which it can be essentially mounted, for the weighing operation, without transverse force and without moment, in the longitudinal and transverse direction at least, a weighing element (15 18) at least being placed between the support (11) and the reservoir (13), characterized in that the reservoir (13), during the running of the vehicle, is tightened firmly, and permanently, against at least one weighing element (15-18), and assembled to the support (11), by adjustable junction devices (21, 22), provided between the support (11) and the tank   (13), and in that the reservoir (13), resting on an element   at least weighing (15 18) is released by the release   connection devices (21, 22) for weighing when the support (11) stops.   2 Method according to claim 1, characterized in that the reservoir (13) is assembled to the support (11) in a fixed unit, under stress of at least one weighing element (15 18).   3 Method according to one of claims 1 and 2, character-   that the tank (13) is tightened during operation   che, in a firm and permanent manner, against a weighing element (15 18) at least, and assembled to the support (11), with a force greater than the weight of the reservoir (13), filled to the maximum, and the forces of shock and impact, exerted during vehicle running.   4 Method according to any one of claims 1 to   3, characterized in that the reservoir (13) is blocked on the support (11), while the vehicle is running, with a force of the order of one ton per weighing element (15 18), of   four tonnes in total, for example.   Equipment for weighing a product, in particular a bulk product, a liquid, a liquid binder, for example bitumen, or the like, contained in a tank (13), which can be placed on a mobile support (11), on which it can be essentially mounted, for the weighing operation,   without transverse force and without moment, in the longitudinal direction   tudinal and transverse at least, a weighing element (15 -   18) at least being placed between the support (11) and the reservoir   see (13), this equipment being provided, in particular, for the   carrying out the process according to claim 1, character-   laughed in that several weighing elements, four elements (15 18), for example, are arranged between the support (11) and the tank (13), and in that these elements (15 18) are stressed during operation of the vehicle, and when weighing, in the weighing direction.   6 Equipment according to claim 5, characterized in that adjustable joining devices (21, 22) are provided between the reservoir (13) and the support (11), these devices making it possible to clamp the reservoir (13) against the elements of weighing (15 18), while walking, or   clear, for the weighing operation.   7 Equipment according to claim 6, characterized in that   that the adjustable joining devices (21, 22) are composed   sent from individual engine cylinders, powered by a fluid under pressure.   8 Equipment according to claim 7, characterized in that   that the engine cylinders are made in the form of a cylinder   dres de traction, which clamp the tank (13), in the direction of traction and against the weighing elements (15 18), and release it in the opposite direction.   9 Equipment according to one of claims 7 and 8,   characterized in that the driving cylinders are produced   in the form of pneumatic cylinders.   Equipment according to any one of claims 5   9, characterized in that a mechanical safety device (28) which makes it possible to mechanically fix the reservoir (13) on the support (11), against any risk of lifting,   is provided between the support (11) and the reservoir (13).   11 Equipment according to claim 10, characterized in that the safety device (28) consists of a pin (29) on a part, on the support (11) for example, and a support (30) on the 'other part, on the tank (13) for example, crossed by the axis (29) with a certain play, and on which can abut the axis (29), via a counter-support (31).   12 Equipment according to any one of claims 5   to 11, characterized by four weighing elements (15 18),   arranged in the corners of a rectangle.   13 Equipment according to any one of claims 5   12, characterized in that weighing equipment (14), containing the weighing elements (15 18), has a level switch (35), which automatically disconnects the equipment (14) and interrupts the operation of weighing, for excessive obliquity of the support (11) when stationary, with the tank (13).   14 Equipment according to any one of claims 5   to 13, characterized in that the weighing equipment (14) has a walk recorder (36), which detects the   movement or stop of the support (11), automatically disconnects   weighing equipment (14) only while the   vehicle, and interrupts the weighing operation.   Equipment according to claim 14, characterized in that the walk recorder (36) is designed as   radar equipment, oriented on the surface (37).   16 Equipment according to any one of claims 5   15, characterized by at least one reference body (39), of a predefined weight, provided on the reservoir (13), and by an additional weighing device (40), disposed between the reference body (39) and the support (11), and assigned to   reference body (39), the weight of which it allows to measure.   17 Equipment according to claim 16, characterized in that the weighing device (40) is connected to the weighing equipment (14) by a control system, which proceeds to a digital adaptation of the weighing results of the equipment ( 14), depending on the obliquity of the support (11) and the   tank (13), determined by the weighing device (40).   18 Equipment according to any one of claims 5   to 17, characterized by a front swinging arm (23) and by a rear swinging arm (24), respectively mounted on the support (11) by one end, on the reservoir (13) by the other end, with a possibility of pivoting about an axis approximately parallel to the longitudinal axis (25) of the support.   19 Equipment according to any one of claims 5   18, characterized by a longitudinal swing arm (26), provided on a longitudinal side, and by another longitudinal swing arm (27), provided on the opposite side of the support (11), these arms being respectively mounted on the tank ( 13) by one end, on the support (11) by   the other end, and being able to pivot around a trans-   versal to the longitudinal axis (25) of the support.