JPS62121132A - Intermittent operation pneumatic device for feeding solid carrier liquid and slurry - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION These inventions relate to intermittently operated pneumatic devices for supplying slurry or solid carrier liquids.

More particularly, the subject of the invention is a pump device operated intermittently by compressed air for transporting solids, which may be adhesives, abrasives or caustics, such as thick pulps or highly abrasive slurries. It makes it possible to transport liquids.

It is composed of different components and has an abrasive effect (relative density 1.6).
It is well known that difficulties in transporting solid carrier liquids such as slurries and valves (as described above) are encountered in industry or water treatment plants. A number of commercially available pumps for performing these tasks have a number of drawbacks. "Slurry Pump"
All of the pumps that exist have at least one component that is rotationally driven by a plunger or an electric motor. A lubrication system is usually facilitated to reduce the friction.In addition, the moving components of these pumps wear out very quickly due to wear phenomena.

Additionally, conventional "slurry pumps" present sealing problems. That is, all of these pumps are equipped with backings and backing boxes that are a source of leakage and contamination that develop over time. Some of these pumps (particularly those coupled with diaphragms and floats) have performance that degrades over time; It is not connected to the carrying pipe material and cannot be easily transported.

Moreover, when such pumps are put out of operation, the discharge pipe material must be cleaned to avoid becoming blocked by entrained solid sediments. Bearing the above in mind, since all known "slurry pumps" are electrically driven and controlled, they are very expensive in terms of overhaul, energy and consumption. Furthermore, the majority of "slurry pumps" in existence have a somewhat narrow relative density range,
If the density exceeds 1.5 to 1.6, delivery becomes difficult and the pump must be used specifically Since the slurry must be centrifuged, it is very expensive to purchase and maintain.

Furthermore, the pneumatic device for bulk materials known from German patent DE-255,84,9 consists of two identical supplies articulated in the manner of a pendulum mounted on the two ends of a vibrating beam. It consists of a container,
The container is thus alternately moved from a higher position, where it is filled with the material to be transported, to a lower position, where the load of material is discharged from the container. Each container is
an elongated chamber having an inlet port and a discharge port therein for retaining debris and allowing air to pass therethrough, and having an inlet port and a discharge port that are open at the upstream and downstream ends of the chamber and can be closed by an inlet valve and a discharge flap valve, respectively; It consists of a tubular body having a filter cartridge forming a filter cartridge. In addition, there are two side pipes, one upstream of which is a suction pipe connected by a valve to a depressurized source, and the other downstream one is a separate side pipe to a compressed air source. a pressurized pipe connected by a valve, the pressurized pipe opening into an annular chamber formed between the filter cartridge and the tubular body of the container.

When one container is empty and in the elevated position, the supply of compressed air to the pressurized pipe is cut off and the discharge valve is closed. and the suction pipe is connected to a depressurized source,
The inlet valve opens and the elongate chamber in the filter cartridge fills with the bulk material carried up by suction to the inlet port by flexible tubing. During this stage, the filter cartridge isolates the suction pipe from the material drawn into the chamber located inside the cartridge. After the suction phase and the filling of the chamber inside the filter cartridge, the corresponding container is lowered to a lower position and the connection between the suction pipe and the reduced pressure source is severed. A connection between the pressurized pipe material and a source of compressed air is then established and compressed air is thus injected into the tubular body. The inlet valve is closed and the discharge valve is opened and the charge of material retained in the chamber inside the filter cartridge is expelled through a flexible discharge tube expelled from the tubular body through the discharge port.

Because of the ensuing operating cycle, this device has two flap valves required to define the aerodynamic chamber after a mode of aerodynamics that requires filling by suction and emptying by pressurization. It is clear that the discharge pipe downstream of the discharge valve must never be completely emptied. In addition, this equipment is specifically designed for conveying bulk products and never for solid conveying liquids or slurries. This is because it contains essential components for its operation.

That is, it is the filter cartridge which isolates the suction and pressurized pipe material from the conveyed material, which after several working cycles is very rapidly disposed of by slurry or other fill carried by the liquid. This is because it will be blocked by

For these reasons, it is possible to overcome the shortcomings of the "slurry pump" for supplying solid carrier liquids and slurries, and in the description of the technology detailed above, while making it possible to planarize the structure. Research has been carried out into new devices intended to limit the number of moving parts and be free from the associated problems of friction, overheating, lubrication and wear, as well as from problems relating to the means for driving the moving parts. It has been.

In particular, another object of the invention is that by its design:
Fireproof (without the use of electric motors) and fully sealed (with the use of a backing box or backing)
The object of the present invention is to provide a device for supplying solid carrier liquids and slurries which should be uniform in performance (without the use of components such as membranes whose mechanical properties deteriorate over time) and consume little energy. .

Yet another object of the invention is to provide an apparatus for dispensing solid carrier liquids and slurries which should be of small volume, easy to transport and install and very economical in terms of purchase and maintenance costs. be.

It is still another object of the present invention to provide a pumping device that is well resistant to abrasion, capable of functioning fully underwater, and capable of transporting slurries containing solids of different components and which may be relatively large in size. It's about doing.

These objectives were accomplished by an intermittently operated pneumatic system for supplying the solid carrier liquid and slurry. By being submerged in a storage tank of solid carrier liquid or slurry or connected to this storage tank via piping, the device is intended to be under continuous load. and the apparatus includes a tubular body defining an interior chamber and having an inlet port and a discharge port opening at upstream and downstream ends thereof, respectively, and at least one pressurized port opening into the interior chamber. at least one pipe for injecting a compressed gas, such as a compressed gas selective to each injection pipe, the pipe being connected to the respective injection pipe and intended to be connected to a source of compressed gas; and a supply valve control device, the device according to the invention being mounted on a support fixed inside the interior chamber between the inlet port and the pressurization port, additionally comprising a flap valve forming a portion of the interior chamber, which cooperates with the pedestal of the tube to surround the passage port and define a pump chamber between it and the discharge port for the solid conveying liquid and the slurry; characterized in that the flap valve faces the discharge valve on the one hand and enters the pump chamber through a passage port in the absence of injection of compressed gas through the pressurized port in a position where the pump chamber is filled. swirling under the pressure of the solid carrier liquid that is about to evaporate, and on the other hand in opposite directions through the discharge port in a position where the pump chamber is closed in an upstream direction and discharged in a downstream direction; towards the pedestal opposite the flap valve applied in a leak-tight manner under the influence of injection through the pressurized port of compressed gas displacing the volume of solid conveying liquid present in the pump chamber from The lowest point of the pump chamber in the area of the flap valve seat is at least as high as the level of the uppermost point of the pump chamber and substantially at the level of the discharge port. There is.

The pump device according to the invention has only one moving part, namely:
As it only includes a flap valve that is easy to manufacture, it results in a very simple structure. In addition, in order to convey any solid carrier liquid, thick and or sticky or slurry into the open air or into a container exposed to the open air, it is necessary to carry the pump chamber and It makes it possible to ensure complete evacuation of the volume of solid carrier liquid held in a discharge tube connected to the body at the discharge port. The construction of the device according to the invention can also be restarted after a cessation of operation without any risk of occlusion of the tubular body or the discharge tube.

In a particularly simple embodiment, the tubular body comprises a longitudinal attachment of two cylindrical skins (or tube sections) assembled by joining two flanges at their adjacent ends, the outer edges of which the valve support held between the cylindrical skin with the passage port forming the valve seat on the side of the discharge port; and a downstream skin (or tube section) via a single pressurized port. and a single pipe tube for injection of compressed gas opening into the top part of the pump chamber formed within. In this case, it is advantageous to additionally utilize a skin (or tube section) with a flange connection at each of its axial ends, the upstream flange of this upstream skin and the downstream flange of the downstream skin being e.g. to a pipe tube supplying the solid carrier liquid to the pump chamber and the tubular body to a discharge pipe for the solid carrier liquid outside the device.

However, in a preferred embodiment, the pump chamber has a cylindrical envelope, making it possible to obtain the main savings in the volume of compressed gas required to purify the pump chamber and at least partially the discharge pipe. a single inlet tube opening into the cylindrical skin via a single pressurized port, the cylindrical skin having a substantially It extends in the downstream direction by a funnel, which is in the shape of a trapezoid of a cone that is offset downwardly.

In this case, the upstream end of the cylindrical skin of the body advantageously has a flange for connecting to the downstream flange of a refill pipe tube opening into the cylindrical skin and forming an inlet port to the body. and the flap valve is carried by a downstream flange of the replenishment pipe, - the downstream end of the cough funnel extends in the downstream direction by a discharge pipe having means for connection to a discharge pipe.

When the discharge tube is relatively short in length, the port for providing an outlet to the pump chamber may simply be formed by the downstream end of the discharge tube to facilitate filling the pump chamber. becomes necessary. The compressed gas supply valve may then simply consist of a two-way valve. However, when the discharge pipe is relatively long, it is preferable that the compressed gas supply valve is a three-way valve, one of the paths of which connects the pump chamber to the air opened by the injection pipe. - the discharge port at the downstream end of the cough discharge tube can nevertheless serve as a port for connection to open air in case of an emergency if the fluid valve does not operate.

The flap valve may be of the type mounted fixedly on the support and pivotable about an axis perpendicular to the direction of flow of the solid carrier liquid in the tubular body; a movable switch intended to be applied in a leak-tight manner to a seat, an apron for mounting on the support, and a pivoting of the switch relative to the apron, connecting the switch to the apron; It may also be of a type consisting of a bendable part forming a hinge that allows movement.

In both cases, the flap valve is made of metal, for example, and is glued or embedded in a plate of elastic material, which allows the device to operate silently and ensures better sealing by the bearing of the valve seat. It can include a hard core material.

When the device includes flanges for fixing the components of the tubular body to each other and/or to the replenishment pipe and/or the discharge pipe and/or tube, it is also particularly advantageous for the device to be quickly assembled and disassembled. It is advantageous to replace the hula knob valve, which is the only part of the device that wears out. The flanges are open at their outer edges and facing each other over two adjacent flanges to be joined, in order to receive by pivoting the threaded rod of the ring bolt holding the screwed nut. It should have several cavities intended for placement. Each of the ringed bolts is mounted to pivot by its ring about a pivot held by an outwardly projecting yoke of the component forming the body, and the pipe or tubing is connected. one of the two adjacent flanges to be joined, so that the corresponding nut can be tightened against the other adjacent flange to be joined.

In order for the device to be able to operate automatically and independently, the device for controlling the compressed gas supply valve advantageously includes a timing device for starting the cycle during which the pump chamber is filled and evacuated. do.

Finally, when the tubular body is connected at the downstream end with a long discharge pipe, it is advantageous to equip this pipe with substantially uniformly spaced non-return valves, each of the non-return valves being Preferably a flap valve type with or without a compressed gas injection tube opening via a pressurized port immediately downstream of each flap valve, which allows the solid carrier liquid to be injected throughout the apparatus. If suitable as far as containers are concerned for receiving the solid carrier liquid and relieving the pressure of the compressed gas, the container may be The pressure discharge is constructed as a whirlpool type, allowing discharge through a discharge column that is subdivided into successive sections, each formed between two successive non-return valves.

Other advantages and characteristics of the invention will become apparent from the following description of two examples of embodiments, given with reference to the accompanying drawings, which are not intended to imply any limitation.

The device shown in FIG. 1 consists of two cylindrical skins 2 and 2.
It consists of a tubular body 1 consisting of a longitudinal axis assembly of 1°, the two cylindrical skins being substantially identical but symmetrically disposed with respect to the relevant transverse plane. Part 2
At one of the two axial ends each of the skins 2 or 2° forms a single component, a radial peripheral flange 3 on the outer surface in the form of an iron-forged collar, while in the form of an annular crown. A further radial outer edge flange 4 having a diameter is added by welding at its other axial end. As a result of the tip-to-back arrangement of the skins 2 and 2°, the downstream flange of the upstream skin 2 and the upstream flange of the downstream skin 2' are formed by two iron-forged reflanges 3 positioned opposite each other. , while the upstream flange of the upstream skin 2 and the downstream flange of the downstream skin 2'' are attached with an added crown flange 4. The flanges 3 and 4 are provided in the axial direction in the usual manner for bolts 6 etc. Holes 5 etc. are passed through which provide passageways, and there are nuts 7 etc. screwed onto the bolts 6 etc., which are tightened against the flanges and thus connect them to each other and to other components. A support 8, in the form of a metal annular disk, is held clamped between two flanges 3, which are connected to each other and to the outer edge portions of opposite faces of the support 8. Once tightened, the support 8 is held in place during assembly by passing at least some of the bolts 6 through holes drilled in its outer radial lugs 9 extending transversely into the interior chamber 10. The support 8 is formed in the skins 2 and 2° and has a central circular passage hole 11, the passage cross-section of which is substantially smaller than the internal cross-section of the skins 2 and 2''. The flap valve 12 is pivotally mounted as a single component on the downstream face of the support 8. This valve 12 is, for example, in the form of a disk with a larger diameter than the circular eyelet 11 and whose upper part revolves around a horizontal transverse axis 14 held by a yoke projecting on the downstream side of the support 8. The valve 12 is integrally fixed to the sleeve 13 by being pivotally mounted. valve 12
are the open position of the port 11 (indicated by the dashed line in FIG. 1), in which the valve 12 is raised toward the downstream direction, and the closed position of the port 11 (indicated by the dashed line in FIG. 1). ), where the valve 12 has a support 8 at the outer edge of the port 11
and a position where it is applied in a leak-tight manner against a valve seat formed on the downstream face of the valve. This valve 12 is made of metal or preferably has a metal core embedded in an elastic material (such as natural or synthetic rubber, silicone elastomer, etc.). The upstream and downstream flanges 5 of the body 1 surround respectively the inlet port 15 and the discharge port 16 of the interior chamber 10, the valve 12 pivoting within a section of the interior chamber 10 which downstream supports 8 and the discharge port 1. -16, which constitutes a pump chamber 17.

The compressed air injection pipe 18 connects to a pressurized port 19 at the bottom of the valve seat at a position above the level of the lowest point of the pump chamber 17.
opens into the pump chamber 17 via the valve seat, the bottom surface of which, in the immediate vicinity of the discharge port 16, is itself connected to the pump chamber 17 as a result of the downward inclination from upstream to downstream given to the body 1. It is above the level of the uppermost point. pipe tube 18
is connected to one passage of the three-way artificial valve 20, whose other passage is connected to a compressed air supply via a pipe line 21, and whose third passage is opened via an end 22. connected to the air. The valve 20 is actuated by a control box 23, which in particular consists of an electrical, electronic or pneumatic mechanism, which connects the pipe 18 with the pipe 21 for introducing compressed air into the pump chamber 17. It controls the selective connection between the connection or the connection of the end 22 to connect the pump chamber 17 to open air. The body 1 is connected at its upstream end via a flange 4 to the downstream end of a replenishment pipe (not shown), which is a storage tank for the solid carrier liquid or a settling tank for the slurry to be supplied. connected to the bottom part of the vessel or concentrator. However, it is also possible for the main body 1 to be sunk in the bottom of a storage tank or settler by means of this upstream flange 4,
Therefore, the device is always under load. The body 1 is connected at its downstream end by a flange 4 to a flange 25 at the upstream end of a discharge pipe 24, the downstream end of which
Slurry opening directly into the air or into an open air storage tank or for receiving a slurry or solid carrier liquid and for relieving the pressure of compressed air. or open into a pressure release whirlpool type container with a double wall that prevents liquid from draining.

The device operates as follows. At the beginning of the working cycle, box 23 operates valve 20 and pipe line 18 and pump chamber 17 are connected via end 22 to open air. Since the body 1 is continuously under load due to the deceleration of the communicating vessel, the solid carrier liquid entering the chamber 10 via the inlet port 15 has the valve 12 opened while passing through the small hole 11 of the support 8. The pump chamber 17 is filled at the position where the pump is placed. Next, box 23
operates valve 20 and pipe 18 is connected to a source of compressed air. Air at an initial pressure of approximately 0.6 MPa is then injected into the pump chamber 17. Under the influence of this atmospheric pressure, the flap valve 12 moves towards its valve seat in the support 8 through the small hole passage 1.
1 is pushed back into the closed position, thus isolating the pump chamber 17 from the storage tank for the slurry or solid carrier liquid to be supplied. At the same time, pump chamber 17
The volume of slurry or solid carrier liquid within the discharge path 24 and possibly a length within the discharge tube 24
is released to the outside through the If the time that compressed air is being injected is long enough, chamber 17 and discharge pipe 24
is emptied and the box 23 again operates the valve 20, ensuring the connection of the pump chamber 17 to the air and the cycle restarts.

The volume of the pump chamber 17 and the discharge pipe 24 is determined by the initial pressure of the injected air and as a result by its length as well as by the discharge head and by the loading pressure of the tubular body 1 and as a result of the solid carrier liquid to be conveyed. The adjustment of the timing mechanism of control box 23 adjusts the sequence and frequency of filling and emptying of the device.

This pumping device, whose body 1 is made of coated or uncoated soft ore or stainless steel ore or metal sheet or an alloy or even an elastomer that resists corrosion by the conveyed liquid, is suitable for solid conveying liquids or concentrated slurry(
relative density 1.3 to 2.2 or higher) with a discharge head of 10 to 50 m and a discharge distance of 20 to 1
00m/hour (1 to 1Qm/hour).

The apparatus of FIG. 2 operates in the same manner as described above in connection with FIG. It differs essentially from the latter in that it is welded to the upstream end of a funnel 33 of wide cross section, which funnel 33 forms the downstream part of the body 31. The shape of the funnel 33 is a trapezoidal shape with a cone offset downward, so that the wall of its lower part is parallel to the direction of inclination of the main body 31, which is inclined downward from upstream to downstream. substantially forms an extension of the wall of the lower portion of the funnel 33, such that the level A of the lowest point at the downstream end of the skin 32 is higher than the level B of the uppermost point at the downstream end of the funnel 33.

In this example, this was obtained when the lower generatrix of the body 31 was inclined at an angle α of 15 degrees with respect to the horizontal. This special shape of the body 31, made for example from a steel sheet with a thickness of 4 mm, allows the body 31 to
Making it possible to limit the use of the incoming compressed air, an injection tube 18 opens into the upper part of the skin 32 through said pressurized port, which tube 18 includes a timing mechanism as in the previous example. It is connected to a three-way valve 20 operated by a box 23.

At its upstream end, the skin 32 projects rigidly outwardly and is bolted by holes 35 adjacent the downstream end of the replenishment pipe 36 to a flange 38 mounted by welding around the replenishment pipe 36. The replenishment tube opens at the upstream end of the skin 32 and has an annular flange 34 secured thereto. At its upstream end, the replenishment tube 36, whose inclination is substantially parallel to that of the body 31, extends substantially vertically so that the flange 37 is inclined at an angle α with respect to a cross section perpendicular to the axis of the tube 36. is attached integrally to the

The flange 37 allows the device to be fixed by means of a bolt bolted directly to the outlet of a storage tank for the solid carrier liquid to be conveyed, or the device can be submerged in this storage tank. or even connect it to a substantially horizontal filling tube. In this example, the downstream end of the pipe tube 36 forms a passage port 41 that may be closed by a flap valve 42. The valve seat is formed by the front surface of the downstream end of the pipe tube 36, and the valve 42 consists on one side of a rubber plate 43, which is connected to the outer skin 32.
A protrusion 3 protruding above the flange 38 toward the inside of the
9 by bolting with its upper part, the valve 42 is intended to close the port 41 in a leak-tight manner, while the valve 42 is fitted with a plate 43 to strengthen the part forming the switch body. The rubber plate 43 thus has a flexible area between the part covered by the metal disc 44 and the part fixed to the support 39, which The area forms a hinge, allowing the switch section of the valve 42 to pivot while allowing the solid-carrying liquid to enter the inner chamber 40 of the pipe tube 3G through the inlet port 45 formed by the upstream flange 37. In the position where the port 41 is open under pressure (indicated by the dashed line in FIG. 2), the body 3
A pump chamber 47 formed in the pipe 18 and the valve 2
0 and the pump chamber 47 via the pipe tube 18 and the valve 20 and the pipe tube 21 to empty the chamber 47.
The closure of the liquid valve 42 pivots to and from the position (indicated by a continuous line in FIG. 2) in which the port is tightly closed under the pressure of compressed air that is allowed to enter. . The downstream end of the funnel 33 is connected by welding (or by a flange) to the upstream end of a short discharge tube 48, which is surrounded by a welded flange 49 forming the discharge port 46 of the device. It is. This latter flange allows the device to be connected to a discharge pipe (not shown). When this discharge pipe is very long, and in order to obtain savings in the use of compressed air, non-return valves may be installed along the discharge pipe at uniform intervals, for example every 50 m.

In this way, the evacuation column is subdivided into adjacent parts that are continuous with each other, and during the phase in which the pump chamber 47 of the device is emptied and while the non-return valve is open, the evacuation column is Adjacent parts are gradually pushed closer to each other, and on the contrary, the non-return valve closes and pumps the pump chamber 47 of the device.
During the filling phase, the adjacent portions of the discharge column move to be isolated by the non-return valve.

Flap valve arrangements such as that shown in FIG. 1 may be used as non-return valves unless the given slope of the arrangement of FIG. 1 is absolutely necessary for them. Additionally, the compressed air injection tube 18 of the apparatus of FIG. 1 does not necessarily need to be used in this application. Compressed air injection slightly downstream of the respective non-return valve is only justified if the total length of the discharge pipe in the unit and/or the pressure effect is large. On the other hand, in this case, the pump chamber 47 of the device
The connection to the air is connected to the corresponding valve 2 for filling purposes.
It is necessary that this be done by 0.

In both examples described above with reference to Figures 1 and 2, the connection of the components of the tubular body to each other and/or to the replenishment or discharge pipes or tubes is provided by through holes opposite each other in the flanges. secured by fixing flanges that are bolted in pairs by passing bolts through them.

Allows the device to be assembled and disassembled faster, both with respect to the connection to the pipe line and the connection of the flap valve support, and in particular with respect to the replacement of the flap valve, which forms the only part of the device that is destroyed and consumed. For this purpose, it is advantageous to use the flange fixing mechanism shown in the area of the valve retaining flange in the alternative embodiment of FIGS. 3 and 4.

As in the example of FIG. 2, FIGS. 3 and 4 show the tubular body skin 32, the compressed air injection tube 18 and the upstream flange 34' of the skin 32, together with the replenishment tube 36 with its upstream flange 37, and , shows the downstream flange 38' adjacent its downstream end forming a passage port 41 which opens into the skin 32 and is closed by a flap valve 42'.

In this alternative embodiment, the valve 42' consists of a circular rubber disc 50, the diameter of which is slightly larger than that of the circular port 41, and reinforced by a metal disc 51 forming a core embedded in the disc 50. , thus a switch is formed.

In its upper part, this disk 50 is extended by a rectangular rubber apron 52 having three holes and by which it is attached to the threaded shafts of three bolts 53, and the heads of said bolts 53. is embedded in a parallelepiped support 39'' welded to the downstream face of the flange 38'', and the apron 52 is inserted between the support 39'' and the pressure plate 54 under the effect of tightening the nut 55 on the bolt 53. The portion 56 located between the apron 52 and the disc 50 thus forms a flexible area that serves as a hinge pivot for the flap valve 42''.

The flanges 34° and 38'', between which the seal 57 is arranged, each have at their outer edge six rounded-bottom radial cavities 58, which are open outwardly and uniformly distributed over the outer edge. The yoke 59 opens outward;
Its two arms are separated by the width of the cavity 58 and are located in an extension of the edge of this cavity 58 and are welded to the outer surface of the skin 31 a short distance downstream of the respective cavity 58 of the flange 34°. A transverse shaft 60 extends between the two arms of the yoke 59 and is fitted with a ring bolt 61, which (by its ringlet 62 in the yoke 59) In addition, a ring nut 64 is screwed into the end of the threaded shaft 63 of the bolt 61. As a result, the two flanges 34° and 38" are located and therefore their cavities 58 form a pair of mutually opposing cavities 1. The bolt 61 can be rotated about the axis 60 so that each of the axes 63 has two opposing cavities in the two flanges 34' and 38°. The nut 64 can then be screwed onto the shaft 63 to tighten the flanges 34° and 38° together.

Conversely, the two flanges can be quickly disassembled by removing the nuts 64 and then rotating the bolts 61 outwards and towards the skin 31 about the axis 60.

The flap valve 42' is thus easily accessible.

The device according to the invention has the following advantages.

These devices command aggressive pumping equipment replacement.

In each cycle, the compressed air displaces a volume of solid carrier liquid or slurry equal to the total work of the pump chamber and discharge tube (the work of the discharge tube depends only on the pressure drop and its cross-sectional area).

The amount of work per hour is a function of the number of cycles per hour required by the timing mechanism in the control box 23, and this amount of work is equal to the number of cycles multiplied by the capacity defined above.

These pump devices have only one moving part, the flap valve.

These pump devices use compressed air as the working fluid.

The air pressure varies from 0.6 to 0.6 depending on the usage conditions. 3MPa
can be changed between.

Control of workload and its changes is clear. A time regulating device in one box 23 operates a three-way valve 20 and determines the frequency of opening to the atmosphere, the filling time of the pump chamber and the compressed air injection time, which are adjusted every hour of the pump device. Determine the amount of work.

The causes of failure of this pumping device are limited.

They may be failures in the supply of compressed air, i.e. drops in pressure in the supply system, as well as flap valves and valve seats that make it impossible to isolate the pump chamber from the storage tank for the solid carrier liquid to be supplied. In any case, only a few minutes are required to disassemble the device to restore it to operating condition.

The pump device does not include a motor, a backing box, or a lubrication system.

The pump device is completely leak proof (no risk of contamination).

The cost of this pumping device is very advantageous compared to that of the "slurry pump" of the art description.

The pump device makes it possible to convey slurries containing hard, abrasive, foreign objects and various other compositions that are not tolerated by centrifugal or screw pumps.

This pumping device is capable of conveying thick slurries having a relative density equal to or greater than 2.2 and also containing metal flakes.

Maintenance of this type of pumping equipment is straightforward and inexpensive.

The use of compressed air is economically advantageous, depending on the working conditions.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram in vertical axial section of a first example of an embodiment of the pump device; FIG. 2 is a similar schematic diagram of a second example of the embodiment. 3 is a partial view in axial section of an alternative form of the device according to FIG. 2; FIG. FIG. 4 is a schematic cross-sectional view of an alternative form of FIG.

Claims (1)

Claims: 1. An intermittent operating pneumatic pump device intended to be under continuous load for the supply of solid carrier liquids or slurries, comprising an inlet port (15, 45) and a discharge port. The tubular body (1, 46) forms an internal chamber with openings at its upstream and downstream ends, respectively.
31) and at least one inlet channel (18) for compressed gas, such as air, opening into the interior chamber via at least one pressurized port (19); a supply valve (20) connected and intended to be connected to a source of compressed gas (21), thus providing a selective supply of compressed gas to the respective injection channel (18); ),
Means for controlling the supply valve are mounted on a support (8, 39) fixed inside the internal chamber between the inlet port and the pressurization port and cooperating with an internal pedestal to the body to provide a passage port (11). , 41) and between it and the discharge port for the solid carrier liquid and slurry.
characterized in that it is additionally constituted by a single flap valve (12, 42) forming part of the internal chamber constituting the discharge valve (47), which flap valve (12, 42) on the one hand (16, 46) through the passage port (11, 41) to the pump chamber (17, 47) swirls under the pressure of the solid carrier liquid or slurry which is about to enter, while in the opposite direction the pump chamber is closed upstream and the solid carrier liquid held within the pump chamber is said valve (12,42 ) so that the lowest point of the pump chamber in the area of the flap valve pedestal towards the pedestal opposite the flap valve pedestal is at least at the same level as the level of the highest point of the pump chamber in the area of the discharge port. An intermittent-operating pneumatic pump device intended to be under continuous load for the delivery of solid-carrying liquids or slurries. 2. The tubular body (1) has two cylindrical skins (2, 2')
The cylindrical skin is assembled by joining together two flanges (3) of their adjacent ends, with a passage port (11) provided between them. holding the valve support (9) with its outer edge forming the valve seat on the side of the discharge port (16), the single compressed gas injection tube (18) with the single pressurized port (19); ) via the downstream integument (2')
A pneumatic device according to claim 1, characterized in that the pump chamber (17) is opened at the top part of the pump chamber (17) formed in the pump chamber (17). 3. The pump chamber (47) is formed in the tubular body (31) forming an upstream part in the form of a cylindrical skin (32), and a single pressurization port (19) is provided in the cylindrical skin (32). via which a single injection tube (18) opens, the cylindrical envelope being characterized in that it extends in the downstream direction by a funnel (33) having the shape of a trapezoid of a substantially downwardly biased cone. A pneumatic device according to claim 1. 4. The upstream end of the cylindrical skin (32) of the body (31) has a replenishment pipe opening into the cylindrical skin (32) forming an inlet port (41) in the body (31). Pipe (3
a flange (34) for connecting to a flange (38) at the downstream end of the replenishment pipe (36), the flap valve (42) being supported by the downstream flange (38) of the replenishment pipe (36); The downstream end of the discharge pipe (48) joins means (49) for connection to the discharge pipe.
4. A pneumatic device according to claim 3, characterized in that the pneumatic device extends in the downstream direction by a. 5. The compressed gas supply valve (20) is a three-way valve, and one of its paths is that the pump chamber (17, 47) is connected to the air opened by the injection pipe (18). A pneumatic device according to one of claims 1 to 4, characterized in that it allows: 6. that the port for connecting the pump chamber (17, 47) to open air is formed by the downstream end of the discharge pipe connected to the outlet of the tubular body (1, 31); Items 1 to 5 of the characterized claims
The pneumatic device described in . 7. said flap valve (12) pivots entirely around an axis (14) fixed to a support (8) and perpendicular to the direction of flow of said solid carrier liquid in said tubular body (1); A pneumatic device according to one of the claims 1 to 6, characterized in that the pneumatic device is installed. 8. A movable switch (50) in which the flap valve (42') is intended to be applied in a leak-tight manner to the valve seat.
and an apron (52) for fixing to the support (39')
and a bendable portion (56) forming a hinge connecting the switch (50) to the apron (52) and allowing pivoting of the switch relative to the apron. A pneumatic device according to one of claims 1 to 6. 9. Claim 1, characterized in that the flap valve (42') consists of a rigid core (51) glued or embedded in a plate (50) made of elastic material. 9. The pneumatic device according to claim 8. 10, consisting of flanges (34', 38') for attaching the components (31) of the tubular body to each other and/or to said replenishment and/or discharge pipe tube (36) and/or to said flange (34'); , 38') has a threaded shaft (63) of a ring bolt (61) which has several cavities (58) and is open at their outer edge, onto which a nut (64) is screwed. Intended to be arranged opposite each other on two adjacent flanges (34', 38') for receiving by pivoting, each of the threaded shafts of the ring bolt 31) pivots by its ring (62) around an axis (60) held by a yoke (59) projecting outwardly of the part forming the pipe (36) or the pipe tube between two adjacent Claims characterized in that one of the flanges (34', 38') is retained for assembly so that the nut (64) is tightened against the other adjacent flange. Pneumatic device according to one of paragraphs 1 to 9. 11. Device for operating compressed gas supply valve (20) (
1 to 10, characterized in that 23) consists of a timing device for initiating the refilling and emptying cycle of the pump chamber (17, 47). pneumatic device. 12. The tubular body (31) is connected in the downstream direction with an elongated discharge pipe, in which non-return valves are mounted at uniform intervals, each of these non-return valves preferably having a A compressed gas injection pipe (1) immediately downstream of each flap valve (12) via a pressurized port (19)
Pneumatic device according to one of the claims 1 to 11, characterized in that it is of the flap valve (12) type with or without 8).