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 moving 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 non-return valve function, valve closing, valve opening, etc.

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

[0003] Piping devices such as non-return valves, on / off valves, flow reducing valves, etc. are known.

[0004] In certain cases, for example when transferring milk contained in a fixed milk tank at a farmer's to a tank of a milk transporter, the tank comprises a pump which sucks the milk contained in the tank, a pipe comprising a base connected to the pump and a hose inserted into the tank. The pipe thus makes it possible to suck the fluid via a suction channel formed by the pipe, here the milk from the tank to the tank.

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

[0006] For example, as seen in Figures 1A, 1B and 1C, the piping may include among the flow management devices, in which a fluid circulates in the direction indicated by the two black arrows: • a main valve 1 to close or open the suction channel, • a flow reduction valve 2 mounted in series with the main valve 1 to modify the product passage section 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 backflow 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 pipework.

[0008] In [Fig. 1A], 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 piping tube (solid or flexible) and at the outlet with another tube or the valve to 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 pipe tube.

[0009] The anti-return device 3 further comprises: • a non-return valve 31 mounted to move in translation along the axis of the pipe between a closed position in which the non-return device 3 bears against the radial wall 300 of the body 30 and an open position in which the non-return device 3 is distant from the radial wall 300 of the body 30, • a shaft 32 secured to 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, making it possible to form a bearing at the other end of the shaft 32, and • a spring 34 mounted between the perforated wall 33 and the non-return valve 31 to help the non-return valve 31 move from the open position to the closed position.

[0010] Thus when the fluid passes in the direction of the non-return valve 31 towards the perforated wall 33, the fluid exerts a force on the radial surface of the non-return 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 non-return valve 31 until it is in the closed position closing the conduit.

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

[0012] The flow reducing valve 2 also comprises a body 20 connected at the inlet to the main valve 1 or a pipe tube and at the outlet to a pipe tube. The flow reducing valve 2 comprises a section reducing valve 21 comprising an opening, and is rotatable relative to the body 20, between a closed position and an open position. In [Fig.lB], the section reducing valve 21 is in the closed position allowing the flow rate to be reduced on the main valve 1. Finally, in [Fig.lC], the main valve 11 of the main valve 1 is in the open position and the section reducing valve 21 of the flow reducing valve 2 is in the closed position. This flow reducing valve 2 thus makes it possible to reduce the section by opening it to reduce the flow.

[0013] However, these different flow management devices are mounted in series, each increasing a risk of leakage between their body and the pipe or other bodies of a connected device. In addition, as visible in [Fig. 1A], each device, even when open, has a surface in the channel reducing its section and each producing a pressure drop. In particular, the non-return valve 31 of the non-return device is on the one hand always active, which increases the pressure drops by the reduction in section between the non-return valve 31 in the open position and the wall 300; and on the other hand the perforated wall 33 also produces the reduction in section and therefore pressure drops. The valve of the main valve 1 and the valve of the flow reduction valve 2 each comprise a surface (the circumferential edge of the valve) which in the open position opposes the circulation of the fluid by reducing the passage of the fluid, thus forming additional pressure drops.All these pressure losses lead to oversizing of the pump and the pipe section but also to overconsumption of energy by the pump, often electric. In addition, all these surfaces in the channel mix the fluid in an unwanted way, which can modify the characteristics of the sucked fluid. This is particularly the case when the fluid is milk, in fact the mixing can lead to lipolysis of the milk (degradation of fats) thus reducing its market value.

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

[0015] The invention offers a solution to the problems mentioned above, by making it possible to use the different functions by means of a single controlled valve.

[0016] One aspect of the invention relates to a device for managing the flow of a pipe comprising: • a body comprising a base, a sealing wall adapted to be mounted on an opening of a pipe T-fitting, a bottom closing the base opposite the sealing wall, • a valve movable in translation 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 open position by an opening chamber to the closed position, controllable by a closing chamber, • characterized in that it further comprises: • a non-return spring mounted compressed between the piston wall and the body to push the valve towards the final closed position to form a non-return valve, • an intermediate chamber for controlling the piston wall in an intermediate position between the open position and the closed position.

[0017] Thanks to the invention, the device makes it possible to carry out the three functions previously described with a single connection to the conduit, thus reducing the risk of leakage. In addition, the device according to the invention greatly reduces pressure losses due to the surfaces in the conduit being much smaller than those of the three devices mounted in series as described previously. Thus, the invention also makes it possible to improve the efficiency of a pumping system comprising the pump and the piping comprising 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 gain of approximately 10% was noted, without any alteration in the quality of the milk collected.

[0018] In addition to the characteristics which have just been mentioned in the preceding paragraph, the flow management device according to one aspect of the invention may have one or more additional characteristics 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 slidably mounted in the control piston, and in which: • the opening chamber is formed axially between the control piston and the sealing wall, connected to a first channel for, under pressure, moving the control piston away from the sealing wall to the opening position, 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 for moving the control piston away from the bottom under pressure to the stop position and the piston wall until the valve is in the final closed position or in abutment against the connection to be closed, • the intermediate chamber is formed axially between the piston wall and the control piston, connected to a third channel for, under pressure, moving 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 flap and the piston wall extend, the main shaft passing in a sealed manner through an opening in the sealing wall and an opening in the control piston.

[0021] According to one embodiment, the main shaft comprises 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.

[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 in one piece with the main body of the valve and is of the same material as this main body of the valve. Preferably the material is food-grade stainless steel and the seal is food-grade elastomer.

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

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

[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 comprises 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 device comprising: • an elbow fitting comprising a channel, comprising: • a first tubular part forming a first part of the channel extending in a direction of circulation along an axis x, • a second tubular part forming a second part of the channel forming a second part of the channel extending in a direction of circulation along a y axis perpendicular to the x axis, • a flow management area including: • a closing wall opposite the second tubular part • a connecting opening opposite the first tubular part, • a stop wall connecting on the one hand the first tubular part to the second tubular part and on the other hand the closing wall to the first tubular part, • a flow management device according to the first aspect of the invention, with or without one or more combinations of the preceding characteristics in which: • the sealing wall closes the connection opening of the elbow connection, • the valve is located in the flow management zone such that in the closed position the valve is in abutment against the abutment 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 more combinations of the preceding characteristics 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 upon reading the following description and examining the accompanying figures. BRIEF DESCRIPTION OF THE FIGURES

[0034] The figures are presented for information purposes only and in no way limit the invention.

[0035] [Fig.lA] represents an axial sectional view of a portion of piping comprising flow devices according to the prior art mounted in series, in an open position.

[0036] [Fig.lB] represents an axial sectional view of the pipe part according to the prior art, in a closed position.

[0037] [Fig.lC] represents an axial sectional view of the pipe part according to the prior art, in a so-called restricted flow position.

[0038] [Fig.2A] represents an axial 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 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 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 information purposes only and in no way limit the invention.

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

[0043] The elbow connector 9 is preferably in a single 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 connection 9 comprises a first tubular part 91 forming a first part of the channel 90 extending in a direction of circulation along an axis x. The first tubular part 91 is therefore in the form of a tube comprising an opening for being connected to the first tube.

[0045] The elbow connection 9 comprises 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 comprise an opening to be connected respectively to the first and second tubes.

[0047] The elbow connector 9 further comprises a flow management zone 94 comprising a connector opening 940 facing the first tubular part 91, a closure wall 941 facing the second tubular part 92 and 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 closure wall 941 to the first tubular part 91. This stop wall 942 comprises a radial surface relative to the axis X extending from the end of the first tubular part 91 all around the latter. In this example, the closure wall 941 comprises a concave internal surface to reduce pressure losses.

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

[0049] The flow management device 4 further comprises a valve 7 (in [Fig.2B]) comprising a flap 79 movable in translation between a closed position visible in [Fig.2A] and an open position visible in [Fig.2B], along the axis X, located in the flow management zone 94. In the closed position, shown in [Fig.2A], the flap 79 is in abutment against the internal radial surface of the abutment wall 942 to close the channel 91 of the connection 9 between the flow management zone 94 and the first tubular part 91.

[0050] The valve 79 is distant from the stop surface in the open position shown in [Fig.2B]. In this case, in this example, the valve 79 in the open position comprises a part between the axis Y 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 part 91 relative to the flow management zone 94.

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

[0052] The base 50 comprises at least two flanges for each attaching to a flange of the connector 9, in particular a flange of the flow management zone 94 around the opening 940.

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

[0054] In this example, the tubular part of the base 50 comprises a counterbore on the side of the bottom 52, in other words the tubular part of the base 50 comprises 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 part forming the flanges and an external tubular part of the base 50 by being force-fitted around the internal tubular part of the first part forming the second cylindrical surface.

[0056] The flow management device 4 comprises 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 is in abutment 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, in abutment against the bottom 52.

[0057] The control piston 6 comprises 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 comprises a tubular wall 61 (here cylindrical) comprising a stop end 610 opposite the radial wall 60, which in the open position, is in abutment against an internal radial surface of the bottom 52.

[0058] The base 50 comprises a first channel A passing radially through the wall forming the second cylindrical surface, forming an air inlet / outlet in the opening chamber 65 for pressurizing air and escaping air 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 relative to the axis X, integral with the valve 79 slidably mounted in 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 rate slowing position shown in [Fig.2C]. In the open position, the piston wall 76 is in abutment against the radial wall 60 of the control piston 6. In the closed position, the piston wall 76 is in abutment 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 comprises 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 rate slowdown position shown 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 is at 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 makes it possible to adapt to the wear of the seal 791. In other words, the more the seal 791 is worn, the more, in the closed position, the closing chamber 75 is voluminous and the smaller the intermediate chamber 67 is.

[0062] In this example, the bottom 52 comprises 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 flap 79 to one end. The flap 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 in a sealed manner through an opening in the sealing wall 51 and in a sealed manner through an opening in the control piston 6 passing axially through the radial wall 60.

[0064] In this example, the main shaft 78 comprises a portion sliding in a sealed manner in an axial opening of the bottom 52 and comprises a third channel 670 referenced in [Fig.2C], comprising an outlet C extending at the opposite end of the valve 79, open onto the intermediate chamber 67 for pressurizing air and escaping the air by a pneumatic control not shown. [Fig.2C] represents the flow management device 4 in the flow rate slowdown position, according to which the intermediate chamber 67 is supplied with pressure by the channel 670 to have its largest volume unlike the open position according to which the volume of the intermediate chamber 67 is the 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 via two openings (but could be opening onto the intermediate chamber via 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 part from the first part 780. In this example the first part 780 is of the same material as that of the main body 790 of the valve 79 (therefore in this example made of food-grade stainless steel) passing through the opening of the sealing wall 51 in a sealed 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 made of food-grade stainless steel, for example by machining or molding.

[0067] The second part 781 is for example made of plastic, fixed 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 by a molded part.

[0068] The second part 781 comprises in this example a blind hole comprising a tapping 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 when pressurized.

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

[0070] The flow management device 4 further comprises a non-return spring 8 mounted compressed 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 non-return spring 8 is a helical spring mounted around the main shaft 78. In this case, the non-return spring 8 is mounted around the second part 781 by being mounted compressed 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 management device 4, the non-return spring 8 exerts a force on the piston wall 76 towards the closed position and therefore moves the valve 79 towards the closed position, the flow of the liquid passing through the channel 90 circulating from the first part 91 to the second part 92 pushes the valve 79 towards the open position by compressing the non-return spring 8. The greater the pressure by the flow of the liquid, the more the non-return spring will compress and the more the valve will move towards the open position. In the case of reverse flow, that is to say from the second part 92 to the first part 91, the pressure of the fluid and the force of the non-return spring 8 exerts 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 management device 4 by only the second channel B, the pneumatic pressure by the air entering 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. The control piston 6 slides to the closed position and the seal 791 comes to be compressed against the stop wall 942 holding the piston wall 76 apart 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 towards the second part 92.

[0076] The more the seal 791 wears (the less it is thick), 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 spaced from the radial wall 60.

[0077] Opening Function [Fig.2B]

[0078] When a pneumatic command is transmitted to the flow management device 4 by only the first channel A, the pneumatic pressure by 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. The control piston 6 in its movement towards the closed position, comes into contact with the piston wall 76 pushing it towards the bottom 52 by compressing the non-return spring 8. The movement of the piston wall 76 causes a movement of the flap 79 of the valve 7 towards and up to the open position. In this example, the other part comprising the part of the main shaft 7 surrounding the second part 781 slides in a sealed manner in an opening of the bottom 52.

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

[0080] The flow rate slowing function is performed by narrowing the section of the channel 90. For this, when a pneumatic command is transmitted to the flow management device 4 by only the second channel B and the third channel C, the pneumatic pressure by 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 exerts a separation force, separating the control piston 6 from the piston wall 76 which slides in the control piston 6 in abutment against the internal stop 62 of the control piston 6. The separation force exerted by the pneumatic pressure coming from the third channel C on the piston wall 76 is entirely in the intermediate chamber 67 to separate the control piston 6 from the piston wall 76. This separation force is greater than the force exerted by the pneumatic pressure coming 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 stop end 610 greater than the force of the non-return spring 8.

[0081] In this position, the valve 79 is in a position between the open position and a position in abutment against the abutment wall 942. In other words, the seal 791 of the valve 79 is spaced from the abutment wall 942 by a distance corresponding to the axial distance between the piston wall 76 in abutment 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 in different figures has a single reference.

Claims

Claims

1. Device for managing flow (4) of a pipe comprising: - a body (5) comprising a base (50), a sealing wall (51) adapted to be mounted on an opening (940) of a pipe T-connection (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 connector (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 allowing a non-return valve to be formed, • an intermediate chamber (67) for controlling the piston wall (76) in an intermediate position between the open position and the closed position.

2. A flow management 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) for, under pressure, moving the control piston (6) away from the sealing wall (51) to the opening 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 moving the control piston away from the bottom under pressure to the stop position and the piston wall until the valve (79) is in the final closed position or in abutment against the connection 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 moving the piston wall away from the control piston under pressure to the pressure slowing position, moving the valve towards the sealing wall in a pressure slowing position.

3. A pipe flow management device according to claim 1 or 2, wherein the valve (7) comprises a main shaft (78) from which the flap (79) and the piston wall (76) extend, 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. Device for managing the flow of a pipe according to the preceding claim, in which the main shaft (78) comprises 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 portion (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 portion (781) which is made of a different material from that of the first portion (780), fixed to the first portion (780), passing through the opening of the control piston in a sealed manner.

6. A pipe flow management device according to 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 part 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 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 circulation along an x ​​axis, • a second tubular part (92) forming a second part of the channel (90) forming a second part of the channel (90) extending in a direction of circulation along a y axis perpendicular to the x axis, • a flow management zone (94) comprising:

1. a closing wall (941) facing the second tubular part (92) 2. a fitting opening (940) facing 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 connection, • the valve (79) is located in the flow management zone (94) such that in the closed position the valve (79) is in abutment against the stop wall (942) to close the channel (91) of the connection (9) between the flow management zone (94) and the first tubular part (91).

9. A pumping system comprising a pump, piping comprising at least one conduit comprising one end connected to the pump and the 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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