CN210087616U - Novel jet self-suction device - Google Patents

Abstract

The utility model provides a novel efflux is from inhaling device installs on pump import pipe, include: a gas-water separation chamber; the inlet of the U-shaped pipe is communicated with the gas-water separation chamber; one end of the jet inlet pipe is communicated with a U-shaped pipe bent opening of the U-shaped pipe; the closed cavity is positioned below the gas-water separation chamber; the venturi chamber nozzle is vertically arranged below the closed cavity, the top end of the venturi chamber nozzle is communicated with the closed cavity, and the bottom end of the venturi chamber nozzle is communicated with the pump inlet pipe; the top end of the auxiliary exhaust pipe is communicated with the closed cavity, the bottom end of the auxiliary exhaust pipe is communicated with the Venturi chamber nozzle, and the closed cavity is communicated with the auxiliary exhaust pipe through the inner cavity exhaust hole; wherein, an upper opening and closing disc, a lower opening and closing disc, an upper spring and a lower spring which are connected in sequence from top to bottom are arranged in the closed cavity, and a hemispherical plug matched with the nozzle of the Venturi chamber is arranged at the bottom end of the lower opening and closing disc; the utility model discloses can reduce among the start-up process operation procedure, can improve from inhaling efficiency, gas in the effective discharge pump reduces from inhaling the energy of process consumption.

Description

Novel jet self-suction device

Technical Field

The utility model relates to a from inhaling technical field, especially relate to a novel efflux is from inhaling device.

Background

The centrifugal pump is an important hydraulic machine and plays an important role in numerous large-scale projects such as chemical transportation, flood fighting and disaster relief, agricultural irrigation, south-to-north water diversion and the like.

However, before the centrifugal pump is started each time, water needs to be filled into the pump cavity, a certain amount of water is ensured to be reached in the pump, the centrifugal pump can normally operate, and meanwhile, the sealing part of the centrifugal pump is prevented from being damaged. If manual watering is carried out, the operation is complex, the efficiency is low, watering is carried out before starting every time, the workload of workers is obviously increased, and the operation starting efficiency of the pump is reduced. Meanwhile, the traditional self-priming device cannot adjust the gas-liquid separation rate and the gas-liquid two-phase flow according to the pressure and the gas content in the starting process, the self-priming mechanism is single in the whole starting process, the self-priming form is fixed, and the flexibility is low. If the gas-liquid separation rate at each stage of the self-priming process is to be adjusted, manual operation at each stage is required, and the implementation is complicated.

SUMMERY OF THE UTILITY MODEL

Exist not enoughly among the prior art, the utility model provides a novel efflux is from inhaling device not only can reduce the start-up in-process operation procedure to can be according to pressure and the gas content in the start-up process, adjustment gas-liquid separation rate and gas-liquid two-phase flow realize that each stage adopts corresponding mode of regulation in the start-up process's mode, improve from inhaling efficiency, gas in the effective discharge pump reduces from inhaling the energy of process consumption.

The utility model discloses a realize above-mentioned technical purpose through following technological means.

A novel jet self-priming device is installed on a pump inlet pipe and comprises:

a gas-water separation chamber;

the U-shaped pipe is obliquely arranged above the gas-water separation chamber, and an inlet of the U-shaped pipe is communicated with the gas-water separation chamber;

one end of the jet inlet pipe is communicated with a U-shaped pipe bent opening of the U-shaped pipe;

the closed cavity is positioned below the gas-water separation chamber;

the venturi nozzle is vertically arranged below the closed cavity, the top end of the venturi nozzle is communicated with the closed cavity, and the bottom end of the venturi nozzle is communicated with the pump inlet pipe;

the auxiliary exhaust pipe is positioned outside the closed cavity, the top end of the auxiliary exhaust pipe is communicated with the closed cavity, the bottom end of the auxiliary exhaust pipe is communicated with the Venturi nozzle, an inner cavity exhaust hole is formed in the side wall, close to the top, of the closed cavity, and the inner cavity exhaust hole is communicated with the auxiliary exhaust pipe and the closed cavity;

the sealed cavity is internally provided with an upper opening and closing disc, a lower opening and closing disc, an upper spring, a lower spring, an elastic thrust device and a hemispherical plug, wherein the upper opening and closing disc and the lower opening and closing disc are parallel to each other and can slide along the inner wall of the sealed cavity, the sealed cavity is divided into an inner cavity upper chamber, an inner cavity middle chamber and an inner cavity upper chamber, the top end of the upper spring is connected with the upper opening and closing disc, the bottom end of the upper spring is connected with the top end of the lower spring, the bottom end of the lower spring is connected with the lower opening and closing disc, the upper opening and closing disc is provided with an upper opening and closing disc leakage hole, the lower opening and closing disc is provided with a lower opening and closing disc leakage hole, the axes of the upper opening and closing disc leakage hole and the lower opening and closing disc leakage hole are inclined with the; elastic thrust device is located go up the upper surface of opening and close the disc, the hemisphere stopper is located open and close the lower surface of disc down, during initial state, go up the spring with the spring all is in compression state down, the hemisphere stopper is located in the venturi nozzle, just the surface of hemisphere stopper can with the laminating of venturi nozzle internal surface blocks the venturi nozzle with airtight cavity and supplementary blast pipe intercommunication.

Preferably, still be equipped with in the airtight cavity and support anchor ring and under bracing anchor ring, go up support anchor ring with the under bracing anchor ring is the arc sleeve, and the cross-section is half annular, go up support anchor ring parcel go up the edge of opening and close the disc, the under bracing anchor ring parcel open and close the disc down, go up support anchor ring with under bracing anchor ring surface all with the inner wall of airtight cavity is tangent.

Preferably, a plurality of staggered grids are arranged in the gas-water separation chamber, the staggered grids are made of porous medium materials and comprise two grid pieces, the two grid pieces are mutually crossed to form an acute angle of 50 degrees, and the distance between the crossed point of the two grid pieces and the top end of each staggered grid is one third of the height of the whole staggered grid.

Preferably, the diameter of the upper spring is gradually increased from top to bottom, the outer surface of the bottom end of the upper spring is in tangential contact with the inner wall of the closed cavity, the diameter of the lower spring is gradually decreased from top to bottom, and the outer surface of the top end of the lower spring is in tangential contact with the inner wall of the closed cavity.

Preferably, the ratio of the elastic modulus of the lower spring to the elastic modulus of the upper spring is 1: 1.5, the ratio of the expansion angle of the upper spring to the contraction angle of the lower spring is 1.5: 1, the ratio of the longitudinal height of the upper spring to the longitudinal height of the lower spring is 1.5: 1.

Preferably, the elastic thrust device is an elastic thrust bowl, the elastic thrust bowl is in a hemispherical bowl shape, the ball inner diameter of the elastic thrust bowl is 12mm, and the ball outer diameter is 20 mm.

Preferably, the venturi nozzle and the closed cavity are coaxially arranged, the inner wall surface of the venturi nozzle is an arc-shaped surface, the venturi nozzle comprises a contraction section and a diffusion section from top to bottom, and the curvature ratio of the contraction section to the diffusion section is 2.4: 1.

Preferably, the included angle between the axis of the upper opening and closing disc leakage hole and the axis of the closed cavity is 25 degrees, the included angle between the axis of the lower opening and closing disc leakage hole and the axis of the closed cavity is 30 degrees, and the diameter ratio of the upper opening and closing disc leakage hole to the lower opening and closing disc leakage hole is 1: 1.5.

preferably, an included angle between the axis of the jet inlet pipe and the central line of the U-shaped pipe is 140 °, and an included angle between the central line of the U-shaped pipe and the upper surface of the gas-water separation chamber is 20 °.

Preferably, the sphere diameter of the hemispherical plug is 25mm, and the sphere center of the hemispherical plug is 3mm higher than the lower surface of the lower opening and closing disc.

The utility model has the advantages that:

1) in the first stage of starting the pump, the high-pressure gas enters the jet inlet pipe, so that the negative pressure in the gas-water separation chamber continuously entrains air in the auxiliary exhaust pipe to be discharged, the upper opening and closing disc and the lower opening and closing disc are continuously lifted, the surface of the hemispherical plug is driven to be gradually separated from the Venturi nozzle, the inlet pipe of the pump is communicated with the inlet of the auxiliary exhaust pipe, and the air in the pump is entrained by the small-flow entrainment of the negative pressure environment in the gas-water separation chamber to enter the U-shaped elbow pipe and is discharged into the atmosphere; in the second stage, the hemispherical plug is completely separated from the Venturi nozzle, and air in the pump inlet pipe enters the closed cavity and pumps the air in the inlet; the third stage, the water level in the pump constantly increases, the gas-liquid two-phase flow enters from the venturi nozzle, because the effect of upper spring, lower spring, upper opening and closing disc leak hole and lower opening and closing disc leak hole, make the gas-liquid two-phase flow enter into the gas-water separation chamber after the secondary separation, further clear away the water in the gas-liquid two-phase flow, the air that separates is discharged into the atmosphere along with the high-pressure air in the jet inlet pipe, the fourth stage, the water that separates in the U-shaped return bend falls back to the gas-water separation chamber, the two parts of moisture that the gas-water separation chamber accumulates flow back to the pump inlet pipe, and upper opening and closing disc and lower opening and closing disc resume to the initial condition, therefore, the utility model discloses the air before having blocked the inlet pipe enters into the pump, has reduced the pump and has taken place cavitation and the noise that produces by the gas-liquid two-phase flow, simultaneously, the utility model not, and the gas-liquid separation rate and the gas-liquid two-phase flow rate can be adjusted according to the pressure and the gas content in the starting process, so that the mode that a corresponding adjusting mode is adopted in each stage in the starting process is realized, the self-priming efficiency is improved, the gas in the pump is effectively discharged, and the energy consumed in the self-priming process is reduced.

2) The utility model discloses an on open and close the disc with lower opening and close the disc, the direction of opening and close disc leakage hole of different slope forms is different on two discs of flowing through, and then arouses to open and close the disc and open and close the disc down and produce different forms's opposite direction moment of torsion for the last spring of connecting between two discs takes place the contraction spacing of not equidimension with lower spring, perhaps not equidimension increase interval, thereby accelerates gas-liquid separation or accelerates the liquid backward flow, promotes start-up efficiency.

3) The utility model discloses in the gas-water separation indoor in disorder a plurality of crisscross grids that are distributing, effectively carry out the disturbance to the two-phase flow that does not have thorough gas-liquid separation, make it fully separate. Meanwhile, the intersection point of the staggered grids is positioned at one third of the height of the whole staggered grid from the top end, and the gas-liquid two-phase flow is mainly distributed at the upper part of the gas-water separation chamber because the water content of the two-phase flow in the gas-water separation chamber is lower at the moment. Therefore, locating the crossover point one-third of the total staggered grid height from the top facilitates further purging of water from the gas-liquid two-phase flow.

4) The utility model discloses in the start-up process, gas-liquid two-phase flow enters into the U-shaped pipe after crisscross grid, and because the density of water is great in U-shaped pipe bend department, the water is separated out under the effect of centrifugal force, and fall back to in the gas-water separation chamber, and the high-pressure air in the air along with the efflux inlet pipe of separating discharges into the atmosphere, has reduced the discharge capacity of start-up in-process normal water, effectively shortens the start-up time.

5) The utility model discloses the relative position between hemispherical plug and the venturi nozzle can effectively be adjusted in the rise and fall of well lower open-close disc to adjust the aperture of venturi nozzle, and the intercommunication mode between pump inlet pipe and the gas-water separation chamber, and then change the exhaust rate of whole device.

Drawings

Fig. 1 is a schematic structural diagram of a novel jet self-priming device according to an embodiment of the present invention.

Reference numerals:

1-a jet inlet pipe; 2-bending a U-shaped pipe; 3-staggered grids; 4-auxiliary exhaust pipe outlet; 5-inner cavity exhaust hole; 6-inner chamber upper chamber; 7-upper support ring surface; 8-auxiliary exhaust pipe; 9-opening and closing the disc leakage hole; 10-spring up; 11-lower spring; 12-an outer shell; 13-lower open-close disc; 14-lower lumen chamber; 15-auxiliary exhaust pipe inlet; 16-a U-tube outlet; 17-a U-tube inlet; 18-gas-water separation chamber; 19-an elastic thrust bowl; 20-upper opening and closing disc; 21-lumen-middle chamber; 22-lower opening and closing disc leakage holes; 23-a lower support annulus; 24-a hemispherical plug; 25-a venturi nozzle; 26-pump inlet tube.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following first describes a novel jet self-priming device according to an embodiment of the present invention with reference to the accompanying drawings.

According to the utility model discloses novel efflux is from inhaling device installs on pump inlet pipe 26, include: an outer shell 12, and a gas-water separation chamber 18, a U-shaped pipe, a jet inlet pipe 1, a closed cavity, a Venturi nozzle 25 and an auxiliary exhaust pipe 8 which are positioned in the outer shell 12.

Specifically, referring to fig. 1, one end of the jet inlet pipe 1 is communicated with the U-shaped pipe outlet 16 of the U-shaped pipe, and an included angle of 140 ° is formed between the axis of the jet inlet pipe 1 and the center line of the U-shaped pipe. The U-shaped pipe is obliquely arranged above the gas-water separation chamber 18 towards the right lower side, the upper surface of the gas-water separation chamber 18 is a horizontal plane, and the included angle of 20 degrees is formed between the central line of the U-shaped pipe and the upper surface of the gas-water separation chamber 18. When novel efflux is from inhaling device start-up, highly-compressed air pours into U-shaped pipe turn-up 2 into through efflux import pipe 1, and discharge into the atmosphere behind the U-shaped pipe export 16 through, because highly-compressed air flows through U-shaped pipe turn-up 2 at a high speed, forms at U-shaped pipe turn-up 2 and is showing the negative pressure to the air that leads to U-shaped pipe import 17 department is constantly carried by highly-compressed air secretly, along with U-shaped pipe export 16 discharge into the atmosphere, further makes and forms negative pressure environment in the U-shaped pipe import 17 gradually.

The U-shaped pipe inlet 17 is communicated with the gas-water separation chamber 18, and along with the starting process, the air in the gas-water separation chamber 18 continuously enters the U-shaped pipe inlet 17 under the action of pressure difference and is finally discharged into the atmosphere, and a negative pressure environment is formed in the gas-water separation chamber 18.

The gas-water separation chamber 18 is internally provided with a plurality of staggered grids 3, the staggered grids 3 are made of porous medium materials, each staggered grid 3 comprises two grid pieces, the two grid pieces are mutually crossed to form an acute angle of 50 degrees, the distance between the crossed point of the two grid pieces and the top end of each staggered grid 3 is one third of the height of the whole staggered grid 3, and the staggered grids 3 are distributed in the gas-water separation chamber 18 in a disordered manner along all directions. The airtight cavity is located the below of gas-water separation chamber 18, be provided with the level in the airtight cavity and parallel placement open and close disc 20 and open and close disc 13 down on, on open and close disc 20 and open and close disc 13 down with the inner chamber is whole to be divided into inner chamber upper chamber 6, chamber 21 in the inner chamber, 14 triplexs of inner chamber lower chamber, the edge parcel of going up to open and close disc 20 has a plurality of support ring faces 7 of going up, the edge parcel of opening and close disc 13 down has a plurality of lower support ring faces 23, go up support ring face 7 surface and the outer surface of lower support ring face 23 and adopt resin material to process, and all with the tangent butt of inner chamber wall, it is the arc sleeve that the cross-section is half-circular to go up support ring face 7 and lower support ring face 23, the radian of going up support ring face.

The upper opening and closing disc 20 is provided with an upper opening and closing disc leakage hole 9 which inclines leftwards, and the upper opening and closing disc leakage hole 9 forms an inclination angle of 25 degrees with the vertical direction and inclines leftwards. Lower opening and closing disc 13 is seted up and is opened and close disc leakage hole 22 down to the right slope, and lower opening and closing disc leakage hole 22 becomes 30 inclination with vertical direction to incline right, and the diameter ratio of upper opening and closing disc leakage hole 9 and lower opening and closing disc leakage hole 22 is 1: 1.5.

go up and open and close disc 20 lower surface and last spring 10 and be connected, go up spring 10 from the top down the diameter crescent make go up spring 10 and be the expansion shape, go up the tangent contact of the surface of the maximum diameter department of spring 10 and the inner wall of airtight cavity, go up spring 10 bottom and be connected on 11 tops of lower spring, lower spring 11 diameter reduces gradually, be the shrink shape, 11 top maximum diameter departments of lower spring, the surface of lower spring 11 contacts with the inner chamber wall is tangent, and the ratio of the elastic modulus of lower spring 11 and last spring 10 is 1: 1.5, while the ratio of the expansion angle of the upper spring 10 to the contraction angle of the lower spring 11 is 1.5: 1, and the ratio of the longitudinal height of the upper spring 10 to the longitudinal height of the lower spring 11 is 1.5: 1.

in the ascending process of the upper opening and closing disc 20, in order to prevent the collision between the upper opening and closing disc 20 and the top of the closed cavity, an elastic thrust device is arranged at the center of the upper surface of the upper opening and closing disc 20, the elastic thrust device is an elastic thrust bowl 19 in the embodiment, the elastic thrust bowl 19 is in a hemispherical bowl shape, the inner diameter of the sphere is 12mm, and the outer diameter of the sphere is 20 mm. When the upper opening and closing disc 20 rises, the elastic thrust bowl 19 is contacted with the top of the inner cavity and is gradually compressed, and the impact of the upper opening and closing disc 20 on the top of the closed cavity is buffered.

The lower surface of the lower opening and closing disc 13 is provided with a hemispherical plug 24, the sphere diameter of the hemispherical plug 24 is 25mm, and the sphere center of the hemispherical plug 24 is 3mm higher than the lower surface of the lower opening and closing disc 13. The hemispherical plug 24 surface can fully conform to the venturi nozzle 25 inner surface to close the venturi nozzle 25. The curvature ratio of the contraction section and the diffusion section of the Venturi nozzle 25 from top to bottom is 2.4: 1.

The bottom of the gas-water separation chamber 18 is communicated with two auxiliary exhaust pipes 8, the bottom ends of the auxiliary exhaust pipes 8 are communicated with the Venturi nozzle 25, the auxiliary exhaust pipes 8 are arranged between the outer shell 12 and the closed cavity, inner cavity exhaust holes 5 are formed in the side wall, close to the top, of the closed cavity, and the inner cavity exhaust holes 5 are communicated with the auxiliary exhaust pipes 8 and the closed cavity.

The utility model discloses a working process:

when the start-up just begins, hemisphere stopper 24 and venturi nozzle 25 laminate completely, venturi nozzle 25 is in the encapsulated situation, get into the first stage along with the start-up process, the negative pressure in the gas-water separation room 18 constantly smugglies the air discharge in the auxiliary exhaust pipe 8 secretly, thereby make the air through inner chamber exhaust hole 5 and the continuous reduction of inner chamber upper chamber 6 intercommunication, pressure reduces gradually, on open and close disc 20 and upwards lift, because on open and close disc 20 side circumference evenly distributed have resin material's last support ring face 7, the surface is smooth, on support ring face 7 and inner chamber wall tangential contact simultaneously, on so open and close disc 20 and lift the resistance of process less, and be difficult to produce the upset.

Along with the continuous lifting of the upper opening and closing disc 20, the upper spring 10 and the lower spring 11 connected with the upper opening and closing disc 20 are gradually restored to a natural state from an original compression state, along with the continuous conveying of high-pressure gas in the jet inlet pipe 1, the negative pressure of the inner cavity upper chamber 6 is gradually increased, the upper opening and closing disc 20 is continuously lifted, the upper spring 10 and the lower spring 11 are converted into a stretching state, so that the surface of a hemispherical plug 24 on the lower opening and closing disc 13 is driven to be separated from the venturi nozzle 25, but the lower opening and closing disc is not completely separated from the venturi nozzle 25, only the pump inlet pipe 26 is communicated with the auxiliary exhaust pipe inlet 15, and air in the pump is entrained into a U-shaped bent pipe by a small flow of negative pressure environment in the air.

The start-up process is constantly gone on afterwards, novel efflux is from inhaling the device and is got into the second stage of start-up, this moment, hemisphere stopper 24 breaks away from venturi nozzle 25 completely, pump import pipe 26 forms the intercommunication through venturi nozzle 25 and inner chamber lower chamber 14, air opens and close disc leakage hole 22 through opening and close down on disc 13 in the pump import pipe 26 down, spring 11, go up spring 10, on open and close disc leakage hole 9 and enter into inner chamber upper chamber 6 in proper order flows through, finally be smugglied secretly and enter into U-shaped return bend eduction gear, the medium that whole in-process carried is the air.

Then, the start-up process gets into the third stage, and most gas has discharged in the pump this moment, and the water level in the pump constantly increases, enters into from venturi nozzle 25 the utility model discloses the medium in the device no longer is single air, but carries the gas-liquid two-phase flow of a large amount of water. One part of the gas-liquid two-phase flow enters the inner cavity lower chamber 14 through the Venturi nozzle 25 and enters the inner cavity middle chamber 21 through the lower opening and closing disc leakage hole 22, and the inclination angle of the lower opening and closing disc leakage hole 22 is 30 degrees to the right and the vertical direction. Therefore, when the gas-liquid two-phase flow enters the lower opening and closing disc leakage hole 22 from bottom to top, impact is generated, so that the lower opening and closing disc 13 generates torque clockwise around the central axis on the horizontal plane, and when the gas-liquid two-phase flow enters the upper opening and closing disc leakage hole 9 from bottom to top, impact is also generated, but the upper opening and closing disc leakage hole 9 forms an inclination angle of 25 degrees with the vertical direction and inclines to the left, so that after the gas-liquid two-phase flow flows through the upper opening and closing disc leakage hole 9, the upper opening and closing disc 20 generates torque anticlockwise around the central axis on the horizontal plane, because the upper opening and closing disc 20 and the lower opening and closing disc 13 rotate in opposite directions, the upper spring 10 and the lower spring 11 which are connected with the two opening and closing discs are deformed, the distance between the two adjacent springs is obviously reduced, and because the section circular diameter of the lower spring 11 is 1, and the ratio of the elastic modulus of the lower spring 11 to the upper spring 10 is 1: 1.5, and the ratio of the expansion angle of the upper spring 10 in the expansion shape to the contraction angle of the lower spring 11 in the contraction shape is 1.5: 1, and the ratio of the longitudinal height of the upper spring 10 to the longitudinal height of the lower spring 11 is 1.5: 1. therefore, by arranging the space between the upper springs 10 to be larger than the space between the lower springs 11, when gas-liquid two-phase flow passes through the lower springs 11 with larger diameter and smaller space, collision is easy to occur, after the gas-liquid two-phase flow collides, liquid is gathered and falls back to the inner cavity middle chamber 21, gas passes through the space between the lower springs 11 and passes through the space between the upper springs 10, and because the space between the upper springs 10 is obviously larger than the space between the lower springs 11, the air rapidly enters the inner cavity upper chamber 6 after passing through the space between the upper springs 10 and after secondary separation of the upper springs 10, and enters the gas-water separation chamber 18 through the inner cavity exhaust hole 5.

Because the staggered grids 3 are distributed in the gas-water separation chamber 18 in a disordered manner, two-phase flow which is not completely separated from gas and liquid is effectively disturbed, and the two-phase flow is fully separated. The distance between the intersection point of the crossed grids 3 and the top end of the whole staggered grid 3 is set to be one third of the height of the staggered grid 3, and because the water content of the two-phase flow in the gas-water separation chamber 18 is lower at the moment, the gas-liquid two-phase flow is mainly distributed at the upper part of the gas-water separation chamber 18. Therefore, the distance between the intersection point of the crossed grids 3 and the top end of the whole staggered grid 3 is one third of the height of the staggered grid 3, which is beneficial to further removing water in the gas-liquid two-phase flow.

Meanwhile, the other part of the gas-liquid two-phase flow enters the gas-water separation chamber 18 through the venturi nozzle 25 and the auxiliary exhaust pipe 8 to be separated into gas and liquid. When high-speed gas-liquid two-phase flow flows through the inner cavity exhaust hole 5 in the auxiliary exhaust pipe 8, negative pressure is generated at the inner cavity exhaust hole 5 due to high speed, secondary entrainment of gas in the inner cavity upper chamber 6 is realized, the exhaust efficiency is improved, the gas-liquid two-phase flow enters the U-shaped pipe after passing through the staggered grids 3, water is separated out under the action of centrifugal force at the bent opening 2 of the U-shaped pipe due to high density of water, and falls back into the gas-water separation chamber 18, and the separated air is discharged into the atmosphere along with high-pressure air in the injection inlet pipe 1.

Starting the fourth stage, only a small amount of air is left in the pump, at this time, high-pressure air is stopped being conveyed into the jet inflow pipe 1, water separated from the U-shaped elbow pipe falls back into the gas-water separation chamber 18, water accumulated in the gas-water separation chamber 18 flows back to the pump inflow pipe 26 in two parts, and one part flows back to the venturi nozzle 25 through the auxiliary exhaust pipe 8 and enters the pump inflow pipe 26; and the other part of the water flows through the auxiliary exhaust pipe 8 and then flows through the inner cavity exhaust hole 5 to fall back to the upper opening and closing disc 20, and is discharged into the inner cavity middle chamber 21 through the upper opening and closing disc leakage hole 9, the water accumulated on the upper surface of the upper opening and closing disc 20 is increased, and the upper opening and closing disc 20 gradually descends. Meanwhile, when water flows pass through the upper opening and closing disc leakage hole 9 from top to bottom, because the upper opening and closing disc leakage hole 9 forms an inclination angle of 25 degrees with the vertical direction and inclines to the left, after gas-liquid two-phase flow flows through the upper opening and closing disc leakage hole 9, the upper opening and closing disc 20 generates clockwise torque around the central shaft on the horizontal plane, backflow water generates impact when entering the lower opening and closing disc leakage hole 22 from bottom to top, and because the lower opening and closing disc leakage hole 22 forms an inclination angle of 30 degrees with the vertical direction and inclines to the right, the lower opening and closing disc 13 generates counterclockwise torque around the central shaft on the horizontal plane. Because the upper opening and closing disc 20 and the lower opening and closing disc 13 rotate in opposite directions, the upper spring 10 and the lower spring 11 which are connected with the two opening and closing discs are deformed, the distance between the upper spring 10 and the lower spring 11 is obviously increased, and water can quickly pass through the upper spring 10 and the lower spring 11, fall back to the lower opening and closing disc 13, and fall back to the pump inlet pipe 26 through the lower opening and closing disc leakage hole 22 and the Venturi nozzle 25.

At the moment, a certain amount of water is respectively accumulated on the upper opening and closing disc 20 and the lower opening and closing disc 13, the upper opening and closing disc 20 and the lower opening and closing disc 13 gradually fall to the bottom end of the inner cavity under the action of the weight of the water and the gravity of the upper opening and closing disc 20, the spring 10 on the lower opening and closing circle and the lower spring 11, the surface of the hemispherical plug 24 is tightly attached to the inner surface of the Venturi nozzle 25, the curvature ratio of the contraction section and the diffusion section of the Venturi nozzle 25 from top to bottom is 2.4:1, and the contraction section with larger curvature is favorable for sealing the upper opening and closing disc. After the lower opening and closing disc 13 falls back, the lower surface of the lower opening and closing disc 13 is not attached to the bottom surface of the inner cavity, and due to the action of the lower support ring surface 23, the lower support ring surface 23 is in a compression state, so that the lower opening and closing disc 13 can be bounced in time when the lower opening and closing disc is started next time conveniently, and the speed when the lower opening and closing disc is started again is improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (10)

1. A new fluidic self-priming device, characterized by being mounted on the pump inlet pipe (26), comprising:

a gas-water separation chamber (18);

the U-shaped pipe is obliquely arranged above the gas-water separation chamber (18), and an inlet (17) of the U-shaped pipe is communicated with the gas-water separation chamber (18);

one end of the jet inlet pipe (1) is communicated with a U-shaped pipe bent opening (2) of the U-shaped pipe;

the closed cavity is positioned below the gas-water separation chamber (18);

the Venturi nozzle (25) is vertically arranged below the closed cavity, the top end of the Venturi nozzle (25) is communicated with the closed cavity, and the bottom end of the Venturi nozzle is communicated with the pump inlet pipe (26);

the auxiliary exhaust pipe (8) is positioned on the outer side of the closed cavity, the top end of the auxiliary exhaust pipe (8) is communicated with the closed cavity, the bottom end of the auxiliary exhaust pipe is communicated with the Venturi nozzle (25), an inner cavity exhaust hole (5) is formed in the side wall, close to the top, of the closed cavity, and the inner cavity exhaust hole (5) is communicated with the auxiliary exhaust pipe (8) and the closed cavity;

wherein, an upper opening and closing disc (20), a lower opening and closing disc (13), an upper spring (10), a lower spring (11), an elastic thrust device and a hemispherical plug (24) are arranged in the closed cavity, the upper opening and closing disc (20) and the lower opening and closing disc (13) are parallel to each other and can slide along the inner wall of the closed cavity, and the closed cavity is divided into an inner cavity upper chamber (6), an inner cavity middle chamber (21) and an inner cavity upper chamber (6), the top end of the upper spring (10) is connected with the upper opening and closing disc (20), the bottom end of the upper spring (10) is connected with the top end of the lower spring (11), the bottom end of the lower spring (11) is connected with the lower opening and closing disc (13), an upper opening and closing disc leakage hole (9) is arranged on the upper opening and closing disc (20), and a lower opening and closing disc leakage hole (22) is arranged on the lower opening and closing, the axes of the upper opening and closing disc leakage hole (9) and the lower opening and closing disc leakage hole (22) are inclined to the axis of the closed cavity, and the inclination directions are opposite; elastic thrust device is located go up the upper surface of opening and close disc (20), hemisphere stopper (24) are located open and close the lower surface of disc (13) down, during initial condition, go up spring (10) with down spring (11) all are in compression state, hemisphere stopper (24) are located in venturi nozzle (25), just the surface of hemisphere stopper (24) can with venturi nozzle (25) internal surface laminating blocks venturi nozzle (25) with airtight cavity and auxiliary exhaust pipe (8) intercommunication.

2. The novel jet flow self-suction device according to claim 1, characterized in that an upper supporting ring surface (7) and a lower supporting ring surface (23) are further arranged in the closed cavity, the upper supporting ring surface (7) and the lower supporting ring surface (23) are both arc-shaped sleeves, the cross section of each of the upper supporting ring surface and the lower supporting ring surface is semicircular, the upper supporting ring surface (7) wraps the edge of the upper opening and closing disc (20), the lower supporting ring surface (23) wraps the lower opening and closing disc (13), and the outer surfaces of the upper supporting ring surface (7) and the lower supporting ring surface (23) are both in tangential contact with the inner wall of the closed cavity.

3. The novel jet flow self-priming device according to claim 1, characterized in that a plurality of staggered grids (3) are arranged in the gas-water separation chamber (18), the staggered grids (3) are made of porous medium materials, the staggered grids (3) comprise two grid pieces, the two grid pieces are crossed with each other to form an acute angle of 50 degrees, and the distance between the crossed point of the two grid pieces and the top end of the staggered grids (3) is one third of the height of the whole staggered grids (3).

4. The new fluidic self-priming device according to claim 1, characterized in that the diameter of the upper spring (10) increases gradually from top to bottom, the outer surface of the bottom end of the upper spring (10) is in tangential contact with the inner wall of the closed cavity, the diameter of the lower spring (11) decreases gradually from top to bottom, and the outer surface of the top end of the lower spring (11) is in tangential contact with the inner wall of the closed cavity.

5. The new fluidic self-priming device according to claim 4, characterized in that the ratio of the elastic moduli of the lower spring (11) and the upper spring (10) is 1: 1.5, the ratio of the divergence angle of the upper spring (10) to the contraction angle of the lower spring (11) being 1.5: 1, the ratio of the longitudinal height of the upper spring (10) to the longitudinal height of the lower spring (11) being 1.5: 1.

6. the new fluidic self-priming device according to claim 1, characterized in that the elastic thrust device is an elastic thrust bowl (19), the elastic thrust bowl (19) is shaped as a hemispherical bowl, the elastic thrust bowl (19) has a ball inner diameter of 12mm and a ball outer diameter of 20 mm.

7. The novel jet flow self-priming device according to claim 1, wherein the venturi nozzle (25) is coaxially arranged with the closed cavity, the inner wall surface of the venturi nozzle (25) is an arc-shaped surface, the venturi nozzle (25) comprises a contraction section and a diffusion section from top to bottom, and the curvature ratio of the contraction section to the diffusion section is 2.4: 1.

8. The novel jet flow self-priming device according to claim 1, characterized in that the angle between the axis of the upper opening and closing disc leakage hole (9) and the axis of the closed cavity is 25 °, the angle between the axis of the lower opening and closing disc leakage hole (22) and the axis of the closed cavity is 30 °, and the diameter ratio of the diameter of the upper opening and closing disc leakage hole (9) to the diameter ratio of the lower opening and closing disc leakage hole (22) is 1: 1.5.

9. the new fluidic self-priming device according to claim 1, characterized in that the angle between the axis of the fluidic inlet tube (1) and the centerline of the U-shaped tube is 140 °, and the angle between the centerline of the U-shaped tube and the upper surface of the gas-water separation chamber (18) is 20 °.

10. The new fluidic self-priming device according to claim 1, characterized in that the spherical diameter of the hemispherical plug (24) is 25mm, the spherical center of the hemispherical plug (24) is 3mm higher than the lower surface of the lower opening and closing disc (13).

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