Device for managing the flow of a liquid moving in a pipe

Abstract

A device for managing the flow of a liquid in motion in a pipe. One aspect of the invention relates to a flow management device 4 comprising a control piston 6 sliding between a stop position and an open position, a valve 7 movable in translation between an open position and a closed position comprising a valve 79 for closing a channel 91, and a piston wall 76 integral with the valve mounted to slide in the piston between the open position and a slowing position, a non-return spring 8 mounted compressed to push the valve towards the closed position, an opening chamber 65 for under pressure to move the piston to the open position, a closing chamber 75 for under pressure to move the piston to the stop position and the valve to close the channel, an intermediate chamber 67 for under pressure to move the piston wall to the slowing position, the valve to a pressure slowing position.Figure to be published with the abbreviation: Figure 2A.

Description

Title of the invention: Device for managing the flow of a liquid in motion in a pipe. TECHNICAL FIELD OF THE INVENTION

[0001] The technical field of the invention is that of devices for managing the flow of a liquid in motion in a pipe, such as the function of a non-return valve, valve closing, valve opening, etc.

[0002] The present invention relates to a piping device for managing the flow of a moving liquid in a pipe and in particular a device for connecting two pipes together with four different functions: the non-return valve, the open flow, the closed flow and the low flow. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0003] It is known from piping devices such as check valves, on / off valves, flow reducing valves, etc...

[0004] In certain cases, for example when transferring milk from a fixed milk tank at a farmer's farm to a milk transporter's tanker, the tanker includes a pump that draws the milk from the tank, piping comprising a base connected to the pump and a flexible hose inserted into the tank. The piping thus allows the fluid to be drawn through a suction channel formed by the piping, in this case, the milk from the tank to the tanker.

[0005] In general, the tank piping includes between the base and the flexible hose various flow management devices mounted in series.

[0006] For example, as can be seen in Figures IA, IB and IC, the piping may include, among other things, flow management devices, in which a fluid flows in the direction indicated by the two black arrows: • a main valve 1 to close or open the suction channel, • a flow-reducing valve 2 mounted in series with the main valve 1 to modify the cross-section of the product passage in the piping, • a non-return device 3 upstream or downstream (here upstream) mounted in series with the two valves 1, 2 in order to prevent a reflux of the fluid when the tank pump is stopped.

[0007] All these different devices (valves and non-return device) are connected to each other or to different areas of the piping conduit.

[0008] In [Fig. IA], the piping is in an open position with the non-return function. The non-return device 3 comprises a body 30 connected at the inlet with a pipe (solid or flexible) and at the outlet with another pipe or the valve. flow reduction 2 or directly to the main valve 1. The body 30 forms a chamber comprising a radial wall 300 on the inlet side, having a larger diameter than the piping tube.

[0009] The non-return device 3 further comprises: • a non-return valve 31 mounted to move in translation along the axis of the piping between a closed position in which the non-return device 3 is in contact with the radial wall 300 of the body 30 and an open position in which the non-return device 3 is away from the radial wall 300 of the body 30, • a shaft 32 integral with the non-return valve 30, extending into the chamber and on the outlet side, • a perforated wall 33 (or arms) fixed to the body 30, allowing a bearing to be formed at the other end of the shaft 32, and • a spring 34 mounted between the perforated wall 33 and the check valve 31 to help the check valve 31 to move from the open position to the closed position.

[0010] Thus, when the fluid passes from the check valve 31 towards the perforated wall 33, the fluid exerts a force on the radial surface of the check valve 31 moving in the chamber towards the perforated wall 33 by compressing the spring 34. When the fluid flows in the other direction, the fluid and the spring 33 exert a force on another radial surface of the check valve 31 until it is in the closed position closing the conduit.

[0011] In [Fig.IB], the main valve 1 is closed, it comprises a body 10 having an inlet connected to the body 30 of the non-return device 3 or a piping tube and an outlet connected to a piping tube or to the flow reducing valve 2. The main valve 1 is a butterfly valve comprising a main poppet 11 movable in rotation relative to the body 10, along an axis perpendicular to the axis of the piping, between an open position visible in [Fig.1A] and a closed position (visible in [Fig.1B]) oriented radially relative to the axis of the piping to close the channel.

[0012] The flow-reducing valve 2 also includes a body 20 connected at the inlet to the main valve 1 or a pipe and at the outlet to a pipe. The flow-reducing valve 2 includes a reducing valve with a cross-sectional area 21 having an opening, and is rotatable relative to the body 20, between a closed position and an open position. In [Fig. 1B], the reducing valve with a cross-sectional area 21 is in the closed position, thus reducing the flow rate through the main valve 1. Finally, in [Fig. 1C], the main valve 11 of the main valve 1 is in the open position and the reducing valve with a cross-sectional area 21 of the flow-reducing valve 2 is in the closed position. This flow-reducing valve 2 thus allows the cross-section to be reduced by opening it, thereby reducing the flow rate.

[0013] However, these various flow control devices are connected in series, each increasing the risk of leakage between their body and the pipe or other parts of a connected device. Furthermore, as shown in [Fig. 1A], each device, even when open, has a surface in the channel that reduces its cross-section and each produces a pressure drop. In particular, the check valve 31 of the check valve is always active, which increases the pressure drop due to the reduction in cross-section between the check valve 31 in the open position and the wall 300; and the perforated wall 33 also reduces the cross-section and thus increases the pressure drop. The valve of the main valve 1 and the valve of the flow-reducing valve 2 each have a surface (the circumferential edge of the valve) which, in the open position, impedes the flow of fluid by reducing the fluid passage, thus creating additional pressure drops.All these pressure losses lead to oversizing of the pump and piping, as well as excessive energy consumption by the pump, which is often electric. Furthermore, all these surfaces within the channel cause undesirable agitation of the fluid, potentially altering its characteristics. This is particularly true when the fluid is milk, as agitation can lead to lipolysis (fat breakdown), thus reducing its market value.

[0014] There is therefore a need to reduce pressure losses while maintaining the different functions. Summary of the invention

[0015] The invention offers a solution to the problems mentioned above, by allowing the different functions to be used by means of a single controlled valve.

[0016] One aspect of the invention relates to a piping flow management device comprising: • a body comprising a base, a sealing wall adapted to be mounted on an opening of a T-fitting of piping, a bottom closing the base opposite the sealing wall, • a movable valve that translates relative to the body between an open position and a final closed position, comprising: • a valve outside the body to close a channel of the fitting, and • a piston wall integral with the movable valve relative to the body of the from open position via an opening chamber to closed position, controllable by a closing chamber. • characterized in that it further comprises: • a compressed check spring mounted between the piston wall and the body to push the valve towards the final closed position, thus forming a check valve, • an intermediate chamber to control the piston wall in a position intermediate between the open and closed positions.

[0017] Thanks to the invention, the device makes it possible to perform the three functions described above with a single connection to the conduit, thus reducing the risk of leakage. In addition, the device according to the invention significantly reduces pressure losses due to the much smaller surface areas in the conduit compared to those of the three devices mounted in series as described above. Thus, the invention also makes it possible to improve the efficiency of a pumping system comprising the pump and piping including at least one conduit and the device according to the invention. Indeed, during a private test, in terms of flow rate, on a milk collection tank with a device for counting the quantity of milk collected, a flow rate increase of approximately 10% was observed, without any alteration in the quality of the collected milk.

[0018] In addition to the characteristics mentioned in the preceding paragraph, the flow management device according to one aspect of the invention may have one or more additional characteristics from among those described in the following paragraphs, considered individually or according to all technically possible combinations:

[0019] According to one embodiment, the device further comprises a control piston sliding in the base between a stop position and an open position, the piston wall integral with the valve being mounted to slide within the control piston, and wherein: • The opening chamber is formed axially between the control piston and the sealing wall, connected to a first channel to pressurize and move the control piston away from the sealing wall to the open position, thus translating the valve into the open position. • The closing chamber is formed axially between the bottom of the body and the piston wall with the control piston, connected to a second channel to, under pressure, move the control piston away from the bottom until it reaches the stop position and the piston wall until the valve is in the final closed position or against the fitting to be closed. • The intermediate chamber is formed axially between the piston wall and the control piston, connected to a third channel to under pressure move the piston wall away from the control piston to the pressure slowing position, moving the valve towards the sealing wall in a pressure slowing position.

[0020] According to one embodiment, the valve comprises a main shaft from which the valve and piston wall extend, the main shaft passing through in a sealed manner an opening in the sealing wall and an opening in the control piston.

[0021] According to one embodiment, the main tree comprises the third channel comprising: • a portion along the axis opening at an end opposite the valve and • a radial section opening onto the intermediate chamber.

[0022] According to an example of this embodiment, the valve comprises a main body and a seal mounted around and on the main body; the main shaft is integral with the main body of the valve and is made of the same material as the main body of the valve. Preferably, the material is food-grade stainless steel and the seal is made of food-grade elastomer.

[0023] According to an example, the main tree comprises: • a first part comprising a first end extending from the valve, passing through the opening of the sealing wall in a watertight manner, and • a second part which is made of a different material than the first part, fixed to the first part, passing through the opening of the control piston in a sealed manner.

[0024] For example the piston wall and the second part are formed from a single piece, for example a molded plastic part.

[0025] For example, a single piece forms the body of the valve and the first part of the main shaft, in this case made of food-grade stainless steel.

[0026] For example, the second part includes a channel extending longitudinally until it opens axially opposite the first part and radially into the intermediate chamber to supply it with air when pressurized.

[0027] According to one example, the main shaft passes in a sealed manner through an opening in the bottom forming a part in the final closed position located outside the body, the third channel opening into this part.

[0028] According to one embodiment, the sealing wall comprises a cylindrical part fitted tightly into the base, forming a stop against the control piston in the stop position.

[0029] According to one embodiment, the sealing wall comprises a cylindrical part fitted tightly into the base, forming a stop against the control piston in the stop position.

[0030] According to a second aspect of the invention, the piping system comprising: • an elbow fitting comprising a channel, including: • a first tubular section forming the first part of the channel extending in a direction of circulation along an x-axis, • a second tubular part forming a second part of the canal forming a second part of the canal extending in a direction of traffic along a y-axis perpendicular to the x-axis, • a flow management area including: • a closing wall opposite the second tubular section • a connection opening opposite the first tubular section, • a stop wall connecting the first tubular section to the second tubular section on one side, and the closing wall to the first tubular section on the other. • a flow management device according to the first aspect of the invention, with or without one or more combinations of the preceding features in which: • the sealing wall closes the connection opening of the elbow fitting, • the valve is located in the flow management zone such that in the closed position the valve is abutted against the stop wall to close the connection channel between the flow management zone and the first tubular part.

[0031] A third aspect of the invention relates to a pumping system comprising a pump, piping comprising at least one conduit connected at one end to the pump and the piping device according to the second aspect of the invention with or without one or combinations of the preceding features connected at the other end to the conduit.

[0032] A fourth aspect of the invention relates to a tank comprising a pumping system according to the second aspect of the invention.

[0033] The invention and its various applications will be better understood by reading the following description and examining the accompanying figures. BRIEF DESCRIPTION OF THE FIGURES

[0034] The figures are presented for illustrative purposes only and are in no way limiting of the invention.

[0035] [Fig.1A] represents an axial cross-sectional view of a portion of piping comprising prior art flow devices mounted in series, in an open position.

[0036] [Fig.1B] represents an axial cross-sectional view of the piping portion according to the prior art, in a closed position.

[0037] [Fig.lC] represents an axial cross-sectional view of the portion of piping according to the prior art, in a position known as restricted flow.

[0038] [Fig.2A] represents an axial cross-sectional view of a piping device comprising a flow management device according to the invention, in a closed position.

[0039] [Fig.2B] represents an axial cross-sectional view of the piping device of [Fig.2A] in which the flow management device according to the invention is in an open position.

[0040] [Fig.2C] represents an axial cross-sectional view of the piping device of [Fig.2A] in which the flow management device according to the invention is in a flow slowing position. DETAILED DESCRIPTION

[0041] The figures are presented for illustrative purposes only and are in no way limiting of the invention.

[0042] Figures 2A, 2B, 2C each show, in axial cross-sectional view, a piping device D comprising an elbow fitting 9 and a flow management device 4 according to an example of the invention shown in different positions.

[0043] The elbow fitting 9 is preferably in one piece (monobloc) and is for example made of food-grade stainless steel and forms an elbow channel 90 for connecting a first tube and a second tube of the piping not shown.

[0044] The elbow fitting 9 comprises a first tubular part 91 forming a first part of the channel 90 extending in a direction of flow along an axis x. The first tubular part 91 is therefore in the shape of a tube comprising an opening for connection to the first tube.

[0045] The elbow fitting 9 includes a second tubular part 92 forming a second part of the channel 90 extending in a direction of circulation along an axis y perpendicular to the axis x.

[0046] The first tubular part 91 and the second tubular part 92 are in this example of cylindrical section and each include an opening to be connected respectively to the first and second tubes.

[0047] The elbow fitting 9 further includes a flow management zone 94 comprising a fitting opening 940 opposite the first tubular section 91, a closing wall 941 opposite the second tubular section 92, and a thrust wall 942 connecting, on the one hand, the first tubular section 91 to the second tubular section 92 and, on the other hand, the closing wall 941 to the first tubular section 91. This thrust wall 942 includes a radial surface with respect to the X-axis extending from the end of the first tubular section 91 all around it. In this example, the closing wall 941 includes a concave internal surface to reduce pressure losses.

[0048] The flow management device 4 includes a sealing wall 51 which closes the connection opening 940 of the elbow fitting 9.

[0049] The flow control device 4 further comprises a valve 7 (in [Fig. 2B]) including a flapper 79 that moves in translation between a closed position visible in [Fig. 2A] and an open position visible in [Fig. 2B], along the X-axis, located in the flow control zone 94. In the closed position, shown in [Fig. 2A], the flapper 79 abuts against the internal radial surface of the stop wall 942 to close the channel 91 of the connection 9 between the flow management zone 94 and the first tubular section 91.

[0050] The valve 79 is located away from the stop surface in the open position shown in [Fig. 2B]. In this example, the valve 79 in the open position comprises a portion between the Y-axis and the opening 940. The valve 79 comprises a main body 790, in this case made of food-grade stainless steel, and a food-grade elastomer seal 791 mounted on the main body 790 so that, in the closed position, the seal 791 deforms in contact with the internal radial surface of the stop wall 942 in order to seal the closure of the first tubular section 91 with respect to the flow management zone 94.

[0051] The flow management device 4 comprises a body 5 including a tubular base 50, here cylindrical along the X axis, the sealing wall 51 extending radially from one end of the tubular base 50. The body includes a bottom 52 closing the other end of the base 50 opposite the sealing wall 51.

[0052] The base 50 includes at least two flanges for each to be fixed to a flange of the fitting 9, in particular a flange of the flow management area 94 around the opening 940.

[0053] In this example, body 5 is formed of two separate parts: • a first part forming the sealing wall 51, the flanges and a tubular part of the base 50, • a second piece forming the base 52 fixed to the second piece. The fixing between the second and first pieces includes, for example, flanges formed on each of the two pieces and a nut, or even a tapped hole and thread, etc...

[0054] In this example, the tubular part of the base 50 includes a counterbore on the bottom side 52, in other words the tubular part of the base 50 includes a first internal cylindrical surface extending from the bottom 52 having a first internal diameter, and a second cylindrical surface extending from the sealing wall 51 having a second diameter smaller than the first diameter.

[0055] According to another example, the first part could be made in two parts: • a first part forming the sealing wall 51 and an internal tubular part of the base 50 comprising the second internal cylindrical surface and • a second piece forming the flanges and an external tubular part of the base 50 by being press-fitted around the internal tubular part of the first piece forming the second cylindrical surface.

[0056] The flow management device 4 includes a control piston 6 sliding in the base 50 between an open position and a stop position. As shown in [Fig. 2A], the control piston 6 abuts against a radial surface of the base 50, in this case against a shoulder formed between the two cylindrical surfaces of the tubular part of the base 50. In the open position, (visible in [Fig.2B]) the control piston 6 is, in this example, against the bottom 52.

[0057] The control piston 6 includes a radial wall 60 (referenced in [Fig.2B]) separating the volume formed by the body into two zones, including an opening chamber 65 formed axially between this radial wall of the control piston 6 and the sealing wall 51. The control piston 6 includes a tubular wall 61 (here cylindrical) comprising a stop end 610 opposite the radial wall 60, which in the open position, is abutted against an internal radial surface of the bottom 52.

[0058] The base 50 includes a first channel A radially passing through the wall forming the second cylindrical surface, forming an air inlet / outlet in the opening chamber 65 for air pressurization and air exhaust by a pneumatic control not shown.

[0059] The valve 7 is movable in translation relative to the body 5 between the open position and the final closed position. The valve 7 further comprises a piston wall 76 radial with respect to the X-axis, integral with the poppet 79 mounted to slide within the tubular wall 61 of the control piston 6. The piston wall 76 is movable relative to the control piston 6 between the open position and a flow-reducing position shown in [Fig. 2C]. In the open position, the piston wall 76 abuts against the radial wall 60 of the control piston 6. In the closed position, the piston wall 76 abuts against an internal stop 62 of the control piston 6 extending from the tubular wall 61. In this case, the internal stop 62 is a circlip-type washer mounted in an internal groove of the tubular wall 61.

[0060] The flow management device 4 thus includes an intermediate chamber 67 formed axially between the piston wall 76 and the radial wall 60 of the control piston 6 and surrounded by the tubular wall 61 of the control piston 6. This intermediate chamber 67 is at its largest volume in the flow deceleration position represented in [Fig.2C].

[0061] The flow management device 4 thus comprises a closing chamber 75 formed axially between the bottom 52 of the body 5 and the piston wall 76 with the end of the tubular wall 61 of the control piston 6, surrounded by the base 50. This closing chamber 75 has its largest volume in the closed position shown in [Fig. 2A]. In this example shown in [Fig. 2A], in the closed position, the intermediate chamber 67 comprises a volume formed by an axial distance between the piston wall 76 and the radial wall 60 of the control piston 6 equal to an axially measured thickness of the seal 791. This allows it to adapt to the wear of the seal 791. In other words, the more worn the seal 791 is, the larger the closing chamber 75 is in the closed position and the smaller the intermediate chamber 67 is.

[0062] In this example, the bottom 52 includes a second through channel B, forming an air inlet / outlet in the closing chamber 75 for pressurizing air and escaping air by a pneumatic control not shown.

[0063] The valve 7 comprises a main shaft 78 extending from the valve 79 to one end. The valve 79 thus extends from one end of the main shaft 78. The piston wall 6 is also integral with the shaft 78. The shaft 78 passes through a sealing opening in the sealing wall 51 and through a sealing opening in the control piston 6, which passes axially through the radial wall 60.

[0064] In this example, the main shaft 78 includes a portion that slides sealed within an axial opening in the bottom 52 and includes a third channel 670, referenced in [Fig. 2C], comprising an outlet C extending to the opposite end of the valve 79, open to the intermediate chamber 67 for air pressurization and air exhaust via a pneumatic control (not shown). [Fig. 2C] represents the flow control device 4 in the flow-restricted position, in which the intermediate chamber 67 is pressurized through the channel 670 to its largest volume, as opposed to the open position in which the volume of the intermediate chamber 67 is at its smallest.

[0065] The third channel 670 comprises, in this example, an axial part 671 extending axially along the axis X from the opening C to a radial part 672 opening onto the intermediate chamber 67, in this case through two openings (but could be opening onto the intermediate chamber through one or more than two openings).

[0066] In particular, in this example, the main shaft 78 comprises a first part 780 referenced in [Fig. 2C] and a second part 781 which is a separate piece from the first part 780. In this example, the first part 780 is made of the same material as the main body 790 of the valve 79 (therefore, in this example, food-grade stainless steel) and passes through the opening of the sealing wall 51 in a watertight manner. For example, the main body 790 of the valve 79 and the first part 780 are formed from a single piece, in this case food-grade stainless steel, for example by machining or casting.

[0067] The second part 781 is, for example, made of plastic, attached to one end of the first part 780 opposite the valve 79, and passes through the opening of the control piston 6 in a sealed manner. The second part 781 and the piston wall 76 are in this case a single piece but could be two separate pieces. In this case, the second part 781 and the piston wall 76 are made of plastic, for example, formed from a molded piece.

[0068] The second part 781 in this example comprises a blind hole including a tapped hole into which the end of the first part 780 is screwed by a thread. The second part 781 comprises the third channel extending longitudinally until it opens axially opposite the first part and radially into the chamber intermediate to supply it with air during pressurization.

[0069] In particular, in the example shown, to simplify the assembly of the valve 7 and the control piston 6, the valve 7 includes another part separate from the second part 781, comprising the piston wall 76 and which is part of the main shaft 7 surrounding the second part 781.

[0070] The flow control device 4 further includes a check spring 8 mounted under compression between the piston wall 76 and the body 5, here the bottom 52, to push the valve 7 towards the final closed position (even when the second channel B is not supplied). In this case, the check spring 8 is a helical spring mounted around the main shaft 78. In this case, the check spring 8 is mounted around the second part 781, being mounted under compression against a surface of the piston wall 76 and a surface of the bottom 52 in the closing chamber 75.

[0071] The operating principle of the flow management device 4 will now be described.

[0072] Non-return valve function

[0073] When no pneumatic command is transmitted to the flow control device 4, the check spring 8 exerts a force on the piston wall 76 towards the closed position and thus moves the valve 79 towards the closed position. The flow of liquid passing through the channel 90 from the first part 91 to the second part 92 pushes the valve 79 towards the open position by compressing the check spring 8. The greater the pressure from the liquid flow, the more the check spring will compress and the further the valve will move towards the open position. In the case of reverse flow, i.e., from the second part 92 to the first part 91, the fluid pressure and the force of the check spring 8 exert a force on the valve 79 towards the closed position by compressing the seal 791 against the stop wall 942.

[0074] Closing function [Fig.2A]

[0075] When a pneumatic command is transmitted to the flow control device 4 via only the second channel B, the pneumatic pressure from the air entering the closing chamber 75 exerts a force on the piston wall 76 and on the radial edge forming the stop end 610 of the tubular wall 61 of the control piston 6, sliding them towards the closed position. The control piston 6 slides to the closed position, and the seal 791 is compressed against the stop wall 942, which holds the piston wall 76 away from the radial wall 60. The pressure exerted on the seal 791 is greater than the pressure exerted by the flow circulating from the first part 91 to the second part 92.

[0076] The more the seal 791 wears (the thinner it is), the closer the piston wall 76 gets to the radial wall 60. The non-return spring 8 thus exerts a force on the piston wall 76 towards the closed position, which remains in this position away from the radial wall 60.

[0077] Opening Function [Fig.2B]

[0078] When a pneumatic command is transmitted to the flow control device 4 via only the first channel A, the pneumatic pressure from the air entering the opening chamber 65 exerts a force on the control piston 6, which slides in the body 5 towards the open position until the stop end 610 presses against the stop of the body 5, here the bottom 52. As the control piston 6 moves towards the closed position, it contacts the piston wall 76, pushing it towards the bottom 52 and compressing the check spring 8. The movement of the piston wall 76 causes the valve 79 to move to the open position. In this example, the other part, comprising the portion of the main shaft 7 surrounding the second part 781, slides tightly within an opening in the bottom 52.

[0079] Pressure reduction function [Fig.2C]

[0080] The flow reduction function is achieved by narrowing the cross-section of channel 90. For this purpose, when a pneumatic command is transmitted to the flow control device 4 via only the second channel B and the third channel C, the pneumatic pressure through the incoming air: • on the one hand, through the second channel B in the closing chamber 75, exerts a force on the piston wall 76 as well as on the radial edge forming the stop end 610 of the tubular wall 61 of the control piston 6, sliding them towards the closed position, • On the other hand, through the third channel C, in the intermediate chamber 67, a spreading force is exerted, pushing the control piston 6 away from the piston wall 76, which slides within the control piston 6 against the internal stop 62 of the control piston 6. The spreading force exerted by the pneumatic pressure from the third channel C on the piston wall 76 is entirely within the intermediate chamber 67 to push the control piston 6 away from the piston wall 76. This spreading force is greater than the force exerted by the pneumatic pressure from the second channel B on the piston wall 76 in the closing chamber 75, since the latter also drives the control piston 6 by exerting a force on the radial edge forming the end of the stop 610 that is greater than the force of the anti-return spring 8.

[0081] In this position, the valve 79 is in a position between the open position and a position abutted against the stop wall 942. In other words, the seal 791 of the valve 79 is separated from the stop wall 942 by a distance corresponding to the axial distance between the piston wall 76 abutted against the internal stop 62 and the piston wall 76 in the closed position. Thus, it is possible to predetermine the flow reduction section by adjusting the distance of the internal stop 62.

[0082] Unless otherwise specified, the same element appearing on different figures has a unique reference.

Claims

Demands

1. A flow management device (4) for piping comprising: - a body (5) comprising a base (50), a sealing wall (51) adapted to be mounted on an opening (940) of a T-shaped pipe fitting (9), a bottom (52) closing the base opposite the sealing wall, - a valve (7) movable in translation relative to the body (5) between an open position and a final closed position comprising: • a valve (79) outside the body (5) to close a channel (91) of the fitting (9), and • a piston wall (76) integral with the valve (79) movable relative to the body (5) from the open position by pressurizing an opening chamber (65) to the closed position by pressurizing a closing chamber (75), - characterized in that it further comprises: • a non-return spring (8) mounted compressed between the piston wall (76) and the body (5) to push the valve (7) towards the final closed position, thus forming a non-return valve, • an intermediate chamber (67) to control the piston wall (76) in an intermediate position between the open position and the closed position.

2. A flow control device (4) for a pipe according to the preceding claim, further comprising a control piston (6) sliding in the base (50) between a stop position and an open position, the piston wall (76) integral with the valve (79) being slidably mounted in the control piston (6), and in which - the opening chamber (65) is formed axially between the control piston (6) and the sealing wall (51), connected to a first channel (A) to, under pressure, move the control piston (6) away from the sealing wall (51) to the open position, translating the valve (79) into the open position, - the closing chamber (75) is formed axially between the bottom (52) of the body (5) and the piston wall (76) with the control piston (6), connected to a second channel (B) for under pressure to move the control piston away from the bottom until the stop position and the piston wall until the valve (79) is in the final closed position or against the fitting to be closed, - the intermediate chamber (67) is formed axially between the piston wall (76) and the control piston (6), connected to a third channel for under pressure to move the piston wall away from the control piston until the pressure reduction position, moving the valve towards the sealing wall in a pressure reduction position.

3. Pipe flow management device according to claim 1 or 2, wherein the valve (7) comprises a main shaft (78) from which extends the valve (79) and the piston wall (76), the main shaft (78) passing in a sealed manner through an opening in the sealing wall and an opening in the control piston (6).

4. A flow management device for a pipeline according to the preceding claim, in which the main shaft (78) includes the third channel comprising: - a part along the axis opening at an end opposite the valve and - a radial part opening onto the intermediate chamber (67).

5. A pipe flow management device according to claim 3 or 4, wherein the main shaft (78) comprises a first part (780) extending from a body (790) of the valve (79) passing through the opening of the sealing wall (51) in a sealed manner, and a second part (781) which is made of a different material than the first part (780), fixed to the first part (780), passing through the opening of the control piston in a sealed manner.

6. A pipe flow management device according to any one of claims 3 to 5, wherein the main shaft (78) passes in a sealed manner through an opening in the bottom (52) forming a portion in the closed position final located outside the body (5), the third canal opening into this part.

7. A pipe flow management device according to any one of the preceding claims, wherein the sealing wall (51) comprises a cylindrical part fitted tightly into the base (50), forming a stop against the control piston (6) in the stop position.

8. Piping device (D) comprising: - an elbow fitting (9) comprising a channel (90), comprising: • a first tubular part (91) forming a first part of the channel (90) extending in a direction of flow along an x-axis, • a second tubular part (92) forming a second part of the channel (90) extending in a direction of flow along a y-axis perpendicular to the x-axis, • a flow management zone (94) comprising:

1. a closing wall (941) opposite the second tubular part (92) 2. a fitting opening (940) opposite the first tubular part (91), 3.a stop wall (942) connecting on the one hand the first tubular part (91) to the second tubular part (92) and on the other hand the closing wall (941) to the first tubular part (91), - a flow management device (4) according to one of the preceding claims, in which: • the sealing wall (51) closes the connection opening (940) of the elbow fitting, • the valve (79) is located in the flow management zone (94) such that in the closed position the valve (79) is abutted against the stop wall (942) to close the channel (91) of the fitting (9) between the flow management zone (94) and the first tubular part (91).

9. Pumping system comprising a pump, piping comprising at least one conduit including one end connected to the pump and piping device (D) according to the preceding claim, connected to another end of the conduit.

10. Tank comprising a pumping system according to the preceding claim for sucking or expelling.

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