CN216952216U - Straight-through serial-type water hammer eliminating device - Google Patents

Abstract

The utility model discloses a straight-through serial water hammer eliminating device which comprises at least three mutually communicated water hammer eliminating structures, wherein each water hammer eliminating structure comprises a buffer unit, water energy consumable units symmetrically arranged at the upper end and the lower end of the buffer unit, and a communication channel for communicating the buffer unit and the water energy consumable units; the buffer unit comprises a spherical tank body and an ellipsoidal rubber bag sleeved in the spherical tank body; a first buffer cavity is formed between the inner wall of the spherical tank body and the outer part of the ellipsoidal rubber bag; the water energy consumable unit comprises an 2/3 ellipsoid tank and a spherical buffer air bag arranged at the upper part of the 2/3 ellipsoid tank; 2/3 a second buffer cavity is formed between the inner wall of the ellipsoidal tank and the outside of the spherical buffer air bag; the communicating channel comprises a self-oscillation pulse jet nozzle; the self-oscillation pulse jet nozzle is in a horn mouth shape; the self-excited oscillation pulse jet nozzle opening faces the water energy consumable unit. The utility model has simple structure, small occupied area, easy maintenance and good effect, and is suitable for popularization and use.

Description

Straight-through serial-type water hammer eliminating device

Technical Field

The utility model relates to the technical field of fluid pipelines, in particular to a straight-through serial-connection type water hammer eliminating device.

Background

When a pump is stopped (particularly when the pump is stopped by accident), the obvious water flow oscillation phenomenon occurs at the outlet of the pump station, namely after the pump is stopped, the water flow continuously moves forwards under the action of inertia to form vacuum at the outlet of the pump station to form negative pressure (negative water hammer), and the pipeline is shrunken and collapsed by the negative pressure; when the water flow is oscillated and returned, huge impact (positive water hammer) is generated on a pipeline and a valve piece at the outlet of the pump station, and the generated instantaneous pressure can reach dozens of times or even hundreds of times of the normal working pressure in the pipeline; due to the large-amplitude pressure fluctuation of the water hammer, strong vibration and noise are easily generated in a pipeline system, and the pipeline system is greatly damaged. At present, water hammer eliminator, water hammer discharge valve, vacuum gulp valve and other water hammer eliminating equipment directly produced by manufacturers are mostly adopted. This equipment is not only expensive but also has a low warranty rate because water hammer may not occur once a few years, and once it occurs, the equipment may fail. The mode that prior art generally used the bypass to absorb the water hammer energy when the water hammer effect of elimination goes on, belongs to the after the fact remedial measure after the water hammer effect takes place, can not avoid the water hammer effect to take place, and the water hammer effect can insert the pipeline to the water route and cause the damage, reduces water route and inserts pipeline life.

Therefore, the influence of the fluid pressure wave on the liquid pipeline transportation system is reduced to the maximum extent, and the improvement of the working stability of the system is particularly important. The water hammer eliminator is one device capable of eliminating the water hammer and the shock of surge produced in the transmission system effectively without stopping the flow of fluid, and this can eliminate destructive shock wave and protect the water hammer. At present, the prevention and control of the water hammer in the fluid pipeline can be roughly classified into four types: the first type is water injection or air injection to buffer and stabilize the pressure, thereby controlling the pressure oscillation of a water hammer in a pipeline and preventing the pressure rise of the water hammer from being too high. The method has large occupied area and high manufacturing cost, and if the air in the injection pipeline cannot be timely removed or is not properly treated, a new water hammer is produced; the second type is valve regulation and control, which has various types of slow-closing check valves, the slow closing and opening of the valve can reduce the change rate of the flow velocity in the pipeline, thereby reducing the rise and the fall of the water hammer pressure, and the method can prevent the water hammer from occurring to a certain extent, but has limited treatment effect on the sent water hammer; the third type is sluicing depressurization to avoid pressure rise, and the type is a pump-stopping water hammer eliminator, an explosion-proof membrane and the like. The method has complex structure and difficult maintenance; the rated bursting pressure of the explosion-proof membrane is difficult to determine due to the influence of materials, a fixing mode of the silica gel and the like; the fourth type is that a water pump unit with large rotational inertia or an inertia flywheel is additionally arranged, and the like, can prevent water hammer to a certain extent, but has limited treatment effect on the generated water hammer. In summary, in the prior art, the influence of actual sites, cost, maintenance and the like is great, so it is necessary to design a device with simple method, small occupied area, easy maintenance and good effect.

Disclosure of Invention

The present invention is directed to a straight-through serial-type water hammer eliminating device to solve the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme: a through serial water hammer eliminating device comprises at least three mutually communicated water hammer eliminating structures, wherein each water hammer eliminating structure comprises a buffer unit, water energy consumable units symmetrically arranged at the upper end and the lower end of the buffer unit, and a communication channel for communicating the buffer unit and the water energy consumable units; the buffer unit comprises a spherical tank body and an ellipsoidal rubber bag sleeved in the spherical tank body; a first buffer cavity is formed between the inner wall of the spherical tank body and the outer part of the ellipsoidal rubber bag; the water energy consumable unit comprises an 2/3 ellipsoid tank and a spherical buffer air bag arranged at the upper part of the 2/3 ellipsoid tank; a second buffer cavity is formed between the inner wall of the 2/3 ellipsoidal tank and the outside of the spherical buffer airbag; the communication channel comprises a self-oscillation pulse jet nozzle; the self-oscillation pulse jet nozzle is in a horn mouth shape; the opening of the self-oscillation pulse jet nozzle faces to the water energy consumable unit; the trumpet-shaped outlet of the self-oscillation pulse jet nozzle is positioned at the lower focal point of the 2/3 ellipsoid tank, and the spherical center of the spherical buffer air bag is coincided with the upper focal point of the 2/3 ellipsoid tank.

Further, the water hammer eliminating structures at the two ends are connected with the fluid pipeline through flanges.

Furthermore, the buffer units of two adjacent water hammer eliminating structures are communicated through a pipeline; the water energy consumable units of the two adjacent water hammer eliminating structures are communicated through a pipeline; the diameter of the communication pipeline is equal to that of the pressure pipeline.

Further, the diameter of the upstream communicating pipe is larger than that of the downstream communicating pipe.

Furthermore, the top end of the water energy consumable unit is connected with an inflating nozzle with a pressure gauge; and the inflating nozzle with the pressure gauge is connected with the spherical buffering air bag.

Further, the surface of the ellipsoidal rubber capsule is concave-convex; the surface of the spherical buffering air bag is concave-convex.

Furthermore, the water hammer eliminating structure is symmetrically arranged in the left and right direction by taking the central axis of the self-oscillation pulse jet nozzle as the central axis; the water hammer eliminating structure is arranged up and down symmetrically by taking the central axis of the ellipsoidal rubber bag as the central axis.

Furthermore, the diameter of the water inlet of the self-oscillation pulse jet nozzle is half of the diameter of a communication pipeline between every two water hammer eliminating structures.

Furthermore, the diameter of the water inlet of the self-oscillation pulse jet nozzle is equal to that of the water outlet.

Furthermore, the first buffer chamber is filled with pure water.

Further, the spherical buffer air bag is filled with gas.

Compared with the prior art, the straight-through serial-connection type water hammer eliminating device has the following advantages:

(1) the utility model eliminates positive water hammer by utilizing the circumferential pressure relief function of the ellipsoidal rubber bag and the energy absorption function of the so-called 'air compression spring'; the structure of an impedance type surge chamber and an air cushion type surge chamber is adopted, and the energy of positive water impact and water flow is reasonably utilized; the energy of positive water hammer is utilized to compress air through the structural action to store the energy, and when the valve is opened next time, the pressure energy and the water replenishing quantity are provided for the pressurization inside the pipeline so as to eliminate the negative water hammer; the water is used as a buffer medium and an ingenious geometrical structure is adopted, so that the direct contact of transmission machinery is avoided, the abrasion of the machinery and the generation of noise are reduced, materials are saved, and the service life of the device can be prolonged. It is worth mentioning that the device of the utility model has good sealing performance, and gas can be used as the buffer medium in the second buffer cavity. The existing water hammer eliminator product has the phenomena of complex system, complex replacement, high cost and the like. Compared with the existing water hammer absorption device and water hammer eliminator, the utility model has obvious technical and economic advantages and has strong practicability and applicability. Especially, the water hammer is more reasonable, more convenient and faster to use under the condition of low load, more money is saved, and the cost performance is optimal.

(2) The ellipsoidal rubber bag in the spherical tank body is directly connected with the pipeline, so that the water hammer wave can be better reflected compared with an impedance pressure regulating chamber, and the problem that if a connecting hole or an impedance hole of the impedance pressure regulating chamber is too small, the effect of the pressure regulating chamber on reflecting the water hammer wave is influenced is solved. The traditional water hammer eliminator is easy to cause certain head loss at the joint of the bottom and the pressure pipeline, and compared with the traditional straight-through connection mode, the head loss caused by pipeline deformation is avoided. Owing to cancelled equipment such as check valve, water hammer annihilator, the equipment that has significantly reduced drops into, but utility model device mobile setting is convenient to maintain simultaneously.

(3) When large-volume water flows in a closed pressure pipeline, because the valve is closed too fast, inertial water flow in the pipeline generates pressure on the valve and a pipe wall, and subsequent water flow generates over-high pressure and damages under the action of inertia, so-called positive water hammer or water hammer phenomena are generated, and the positive water hammer often causes the breakage and the damage of the pipeline to cause accidents. When the valve is suddenly opened, the pressure in the pressure pipeline is sharply reduced, a negative water hammer phenomenon is generated, and the pipeline is collapsed due to the excessively low pressure during the negative water hammer, so that the valve and the fixing piece are damaged. According to the utility model, the spherical buffer air bag is compressed, and the energy of positive water hammer is converted into compressed gas energy, so that the energy of positive water hammer is utilized; when the valve is opened next time, the compressed gas energy is converted into potential energy and kinetic energy of water, so that the interior of the pipeline is pressurized, the phenomenon of negative water hammer is prevented, and the negative water hammer is eliminated.

(4) The utility model eliminates the serial structure by three water hammers, the unit body is that at least two symmetrical water energy consumable units are arranged on the spherical tank body with high bearing capacity, and a balanced structure system is utilized to improve the stress performance of the structure and avoid the unstable structure of the whole device. Equivalently, at least two impedance holes are arranged, and the advantages are that: the water shock wave can be fully reflected, the fluctuation range of the water level in the pressure regulating chamber is effectively reduced, and the water fluctuation is attenuated at a higher speed and tends to be stable; the self-energy consumption function is utilized to improve the hammer eliminating efficiency and effect and improve the running condition of the device. The utility model has novel concept, ingenious structure and strong practicability, can realize multiple dissipation of water hammer pressure, the ellipsoidal rubber bag and the spherical buffer air bag cavity are in flexible contact with water body to operate without generating noise when expanding and contracting under the action of water power, meanwhile, the pressure of the spherical buffer air bag is convenient and fast to adjust, the capsule cavities with different thicknesses can be selected and matched according to different pipeline pressures, and the convenience, the practicability and the applicability are improved. Meanwhile, the corresponding fixed base is favorably arranged, a hyperstatic supporting system is realized, the overall stability and safety of the structure are ensured, and the occupied space can be reduced.

(5) The utility model solves the problems of positive water hammer caused by closing the valve of the pressure pipeline and the valve, improper energy utilization of the water hammer phenomenon and negative water hammer caused by opening the valve. Most of the existing water hammer eliminating devices are complex in structure and high in operation difficulty, negative water hammer cannot be effectively eliminated, and part of the existing water hammer eliminating devices gradually consume energy by water and pressure generated by the water through a spring stretching mode, so that the energy is wasted. The device that has the solution water hammer problem of current has stability not high enough, and the complicated later stage of operation is difficult for overhauing the maintenance scheduling problem.

(6) The three water hammer eliminating structures of the utility model are connected in series to generate the reaction, which is like 'soft operation', the shock wave is used as the strong force side with strong force, the water hammer eliminating device is undoubtedly used as the passive weak force side, and even if the water hammer eliminating device is used as the weak force side, the strong force of the opponent can be reacted to the opponent. The double differential effect, the counter effect and the self-energy consumption effect are generated among the three units, which are the most important and obvious characteristics and characteristics of the utility model. In the device, the three water hammer eliminating structures are connected in series to gradually dredge water flow, and in the dredging process, the flow rate of the water flow is gradually reduced, the flow speed of water is also gradually reduced, so that negative water hammers can be effectively prevented; if the pipeline system generates the negative pressure water hammer, the ellipsoidal rubber capsules in the three water hammer eliminating structures supplement water to the pipeline, the flow and the flow speed of water are gradually increased in the water supplementing process, and the water hammer phenomenon is avoided.

(7) The prior art generally uses the bypass to absorb the mode of water hammer energy when eliminating the water hammer effect and goes on, belongs to the aftermath remedial measure after the water hammer effect takes place, can not avoid the water hammer effect to take place. The water hammer energy also acts directly on the equipment connection to cause damage to the equipment and the pipeline. The device is directly connected in series in a pipeline system, and the ellipsoidal rubber bag is directly communicated and connected with the pipeline, so that the device not only can prevent the occurrence of the water hammer effect in advance, but also has the advantage of effectively eliminating the water hammer effect after the occurrence of the water hammer effect. Therefore, the problems that the existing water hammer eliminator does not have prevention capability and the elimination capability is not enough after the water hammer effect occurs are solved. This concept of preventing remedial absorption prior to, rather than after, the onset of the water hammer effect provides the present invention with significant technical advantages.

(8) The series-connected water hammer eliminating units can be increased or decreased as required, so that the form of the eliminator with different hammer eliminating performances can be set, and the distance between the series-connected water hammer eliminating units can be adjusted as required, thereby improving the eliminating performance of the water hammer eliminator. The serial water hammer eliminating device is simple in structure and convenient to build and construct, has higher engineering cost performance and stronger hammer eliminating performance compared with the increase of the piston section of the piston type eliminator, and is favorable for popularization and application in oil and water transportation engineering.

(9) The volume of the spherical buffer air bag can be set according to the requirement. High-pressure water flow is sprayed from a lower focal point spray nozzle, is refracted and reflected by the wall surface of the inner cavity of the ellipsoid tank, the pressure of the flow beam is focused at a second focal point, a spherical buffer air bag is arranged at the position, the spherical center of the air bag is superposed with the second focal point, the water flow applies pressure to the outer surface of the air bag, and flow lines are converged and pass through the second focal point, so that the air bag can be efficiently compressed; the spherical buffer air bag rebounds, and the pressure of the flow beam can perform a larger impact action in the reverse direction after focusing and energy gathering along the same catadioptric route in the reverse direction; the major axis and the minor axis of the ellipsoid tank are changed, so the volume of the spherical buffer air bag is changed, namely, the volume of the spherical buffer air bag can be designed to be larger or smaller; the major axis and the minor axis of the ellipsoid tank are changed, so the volume of the ellipsoid tank is changed, that is, the volume of the ellipsoid tank can be designed according to the requirement. (when the major axis and the minor axis of the ellipse are equal, the ellipse can become a circle, the utility model mainly utilizes that the ellipsoid can has focusing property, has the function of gathering energy, can gather and use the energy, and achieves the aim of improving the working efficiency of the whole device.)

(10) The water hammer pressure is very huge and attacks in the twinkling of an eye, and the water hammer energy is shared by three water hammer elimination units together and the stress of each part of the whole device is comparatively even, so that the situation that when a single mechanism is used, the local stress is uneven and the single mechanism is easily damaged when being impacted by a larger water hammer is avoided. The three are connected in series, so that the service life of the device can be greatly prolonged. The hydraulic shock absorber has the advantages of low noise, good sealing property, no maintenance, difficult abrasion, no need of frequent inflation, good corrosion resistance, convenient installation and use, no requirement on the property of a conveyed medium, small destructive change on a pipeline, and low manufacturing cost and maintenance cost of the device, so that the hydraulic shock absorber has great technical advantages compared with the existing piston type, rubber bladder type and straight-through type water hammer suppressors.

(11) As the eliminator for eliminating the water hammer, the tank body is sleeved with the ellipsoidal rubber bag, the shape and the structure of the external tank body are required to bear high pressure, and the spherical tank body has the highest pressure bearing capacity, so the spherical tank body is used as the main pressure bearing tank body structure, and raw materials can be saved.

(12) Pure water is used as a buffer working medium in a buffer chamber of the device. According to the utility model, the capsule body and the spherical air bag in the unit have higher energy absorption efficiency in the water pulsation environment. Due to the unusually high surface tension of water, (insects are able to "walk on water"). Under the same system pressure, the kinetic energy generated by water is large, the amplitude is large, and the device has more advantages and potentials in the aspects of generation of 'wave' and generation of pulsation effect and in the aspect of realizing switching between static pressure and dynamic pressure environments of water bodies of underwater ellipsoidal capsule bodies and water surface spherical air bags. Recent scientists have for the first time directly observed how hydrogen atoms in water molecules "pull and push" the "quantum pull" of adjacent molecules when excited by a laser, revealing the key that may be a microscopic cause of the strange nature of water. This may be helpful in better understanding and understanding how water helps the capsule body and bladder components function in the device of the present invention. The characteristic that the surface tension of water is abnormally high is most suitable for the structure of the device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model without limiting the utility model in which:

FIG. 1 is a schematic structural view of a straight-through tandem water hammer removing device according to the present invention;

in the figure:

the device comprises an inflating nozzle 1 with a pressure gauge, a spherical buffer air bag 2, a second buffer cavity 3, a self-oscillation pulse jet nozzle 4, a spherical tank body 5, an ellipsoidal rubber bag 6, a first buffer cavity 7, an 2/3 ellipsoidal tank 8, an upstream communicating pipe 9 and a downstream communicating pipe 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening profiles, or both. The meaning of the above terms in the present invention can be understood by those of ordinary skill in the art as the case may be.

Before describing the embodiments of the present invention, the principle of forming the water hammer shock wave is explained: when the water pump of the main water pipe is stopped suddenly, the pressure in the main water pipe is reduced, the transient static water in the main water pipe generates a backflow high-pressure water wave under the action of gravity and a static head, and the backflow high-pressure water wave impacts a valve at the position of the water pump to generate a back-oscillation high-pressure water hammer wave.

Fig. 1 is a drawing of an embodiment of the present invention, and please refer to the drawing, in which the embodiment provides a through serial connection type water hammer eliminating device, which includes at least three water hammer eliminating structures that are communicated with each other, and the water hammer eliminating structures at two ends are connected with a fluid pipeline through a flange; each water hammer eliminating structure is symmetrically arranged, and specifically, the water hammer eliminating structures are symmetrically arranged left and right by taking the central axis of the self-oscillation pulse jet nozzle 4 as the central axis; the water hammer eliminating structure is arranged up and down symmetrically by taking the central axis of the ellipsoidal rubber capsule 6 as a central axis; each water hammer eliminating structure comprises a buffer unit, water energy consumable units symmetrically arranged at the upper end and the lower end of the buffer unit, and a communication channel for communicating the buffer unit and the water energy consumable units.

Specifically, the buffer unit comprises a spherical tank body 5 and an ellipsoidal rubber bag 6 sleeved in the spherical tank body 5; wherein the spherical tank body 5 is hermetically connected with the ellipsoidal rubber bag 6; a first buffer cavity 7 is formed between the inner wall of the spherical tank body 5 and the outer part of the ellipsoidal rubber bag 6; the first buffer chamber 7 is filled with a liquid. Wherein, ellipsoid rubber bag 6 surface is the concave-convex, can be regular concave-convex, also can be irregular concave-convex or wavy, sets up like this and can increase with the area of action of water shock wave, and the effectual energy impact that absorbs the intracavity pressure variation and produce prolongs the life of ellipsoid rubber bag 6 simultaneously, guarantees the stability of ellipsoid rubber bag 6.

The water energy consumable unit comprises an 2/3 ellipsoid tank 8 and a spherical buffer airbag 2 arranged at the upper part of the 2/3 ellipsoid tank 8; wherein spherical buffering gasbag 2 intussuseption is filled with gas, and the buffer gas that fills in spherical buffering gasbag 2 can realize the water and get into the buffering effect when second buffer chamber 3 on the one hand, and on the other hand can realize the water and eliminate the mobile drive function between the structure at three water hammer to increase from the power consumption effect. Specifically speaking, the method comprises the following steps: the rebound effect of the spherical buffer air bag 2 and the inertia effect of water flow enable the water body to flow among the first buffer chamber 7, the self-oscillation pulse jet nozzle 4, the second buffer chamber 3 and the communicating pipeline, energy consumption is caused by the narrowing effect of different sections among the communicating pipeline inside the water hammer eliminating structure and among the water hammer eliminating structures, the water body moves inside the whole device and is equivalent to the fact that a water plug moves up and down in a piston cylinder body, and the piston is supported and lifted due to the fact that the water body flows and the effect of the gravity of the water body and the friction resistance generated by the contact of the water body and the inner surface of a flow channel needs to be overcome, so that more energy is consumed, and multiple self-consumption reduction of energy is caused; the hydroenergy consumable units in the three water hammer eliminating structures are symmetrically arranged, and the generated internal couple moment torque, the acting force and the reacting force are mutually offset, so that the whole device is favorable for realizing statically determinate work. The more the water hammer eliminating units are arranged, the more the self-consumption energy is, and the quicker the hammer eliminating effect is. Through the mutual cooperation of the anti-reaction of ellipsoidal rubber bag 6, self-oscillation pulse jet nozzle 4, spherical buffering gasbag 2, first cushion chamber 7, communicating pipe and second cushion chamber 3, along with the water body at three water hammer elimination structure between the back and forth cyclic motion, the ellipsoidal rubber bag 6 in the structure is eliminated to three water hammer is repeated the inflation shrink, and reciprocal oscillation eliminates the energy. The problem of water hammer can be effectively solved, the speed of water flow cannot be influenced, and conveying under the safe condition is ensured.

Further, a second buffer cavity 3 is formed between the inner wall of the 2/3 ellipsoidal tank 8 and the outside of the spherical buffer airbag 2; wherein, spherical buffering gasbag 2 surface is unsmooth form, can be regular unsmooth form, also can be irregular unsmooth form or wavy, set up like this can increase with the area of action of water hammer ripples, effectual absorption buffering intracavity pressure change and the energy impact that produces, prolong spherical buffering gasbag 2's life simultaneously, guarantee spherical buffering gasbag 2's stability.

Further, the top end of the water energy consumable unit is connected with an inflating nozzle 1 with a pressure gauge; and the inflating nozzle 1 with the pressure gauge is connected with the spherical buffering air bag 2. When the pressure-adjustable spherical buffer air bag type air cushion pressure-adjusting chamber is used, the air is inflated through the inflating nozzle 1 to adjust the air pressure of the spherical buffer air bag 2 to form the pressure-adjustable core bag type air cushion pressure-adjusting chamber, the spherical buffer air bag 2 is inflated to integrally form an elastic body, the upper part of the elastic body is attached to the inner cavity of the 2/3 ellipsoidal tank 8, and the lower end of the spherical buffer air bag 2 is positioned on the water surface in the second buffer cavity 3.

The communication channel comprises a self-oscillation pulse jet nozzle 4; the self-oscillation pulse jet nozzle 4 is in a horn mouth shape; the self-oscillating pulse jet nozzle 4 opens towards the water energy consumable unit. Specifically, the small-mouth end of the self-oscillation pulse jet nozzle 4 is communicated with the spherical tank body 5 through a short pipeline; the big opening end of the self-oscillation pulse jet nozzle 4 is communicated with the 2/3 ellipsoidal tank 8.

In addition, three 2/3 ellipsoidal tanks 8 which are communicated with each other are communicated through a communicating pipe, and the pipe diameter of the upstream communicating pipe 9 is larger than that of the downstream communicating pipe 10. Thus, installation personnel can distinguish the installation conveniently.

According to the hydraulic relationship between the upstream and the downstream, the communicating pipes with different pipe diameter sectional areas are respectively arranged, the communication between the upstream and the downstream water hammer eliminating units is realized by utilizing the section change of the communicating pipes, and compared with the conventional equal-diameter communicating pipes, the damping energy consumption effect is more obvious. Specifically, a container communicated with a water body is formed between the communicating pipe 10 and the second buffer chamber 3, so that a series pressure regulating chamber structure is formed, and the pipe diameters of different communicating pipes are different. The water flow effect caused by the water attack inertia enables the water flow to circulate between the buffer cavity and the communicating pipe, and the beam narrowing effect of different sections causes energy consumption, reduces the water attack pressure, and is beneficial to the pressure regulation and the pressure stabilization of the buffer cavity. The pipe diameter of the upstream communicating pipe 9 is larger than that of the downstream communicating pipe 10, so that the pressure of the water body in the second buffer chamber 3 of the downstream unit can be quickly dredged to the second buffer chamber 3 of the upstream unit, and the pressure balance and the pressure buffering can be quickly realized.

When the water hammer shock wave enters the spherical tank bodies at two ends to enable the ellipsoidal rubber bag to expand rapidly, when high-pressure water flow in the first buffer cavity 7 passes through the inlet of the self-oscillation pulse jet nozzle 4, the water flow is narrowed, namely an impedance orifice generates local resistance, and a part of energy is consumed; then passes through the interior of the self-oscillation pulse jet nozzle, and the high-pressure water body generates a dynamic impedance effect when passing through the interior of the self-oscillation pulse jet nozzle, so that the energy is further consumed; when high-pressure water flow enters the second buffer chamber at the top, the volume is greatly increased, the water body pressure is greatly reduced, and meanwhile, the spherical buffer air bag 2 is compressed to form a buffer damping structure, so that the water body energy is further weakened; spherical buffering gasbag 2 produces the resilience effect, and higher pressure's rivers form in terminal water hammer eliminates structure second buffer chamber's communicating pipe gets into adjacent unit second buffer chamber, form the hedging mixing energy dissipation, make simultaneously in the second buffer chamber the water hammer power that receives can be quick dredge and disperse to the life-span that spherical buffering gasbag used has been prolonged. The adjacent cell then acts as well as the upstream cell. The action effects of the two units at the upstream have certain hysteresis, so that the spherical buffering air bag is firstly subjected to pressure buffering and the pressure-limiting and quantity-limiting drainage of the second buffering cavity is realized, namely, the effects of large buffering and then pressure relief and pressure release are realized, and the spherical buffering air bag is prevented from being instantaneously damaged by pressure; as for two upstream water hammer eliminating structures, high-pressure water flows in the second buffer chamber and the first buffer chamber are mixed and collided, so that the mutual offset of shock wave energy is realized, a 'counter-control' mechanism is formed, the 'braking' and 'weighing' effects are exerted on the ellipsoidal capsule body, the pressure-bearing state of the ellipsoidal capsule body is effectively relieved, and meanwhile, the spherical buffer air bag in the second buffer chamber at the top of the tail end water hammer eliminating structure also plays a pressure relief role. Therefore, the three ellipsoidal rubber capsules 6 can be protected, and the working performance of the whole device is improved.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, although the present invention is described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. A through serial water hammer eliminating device is characterized by comprising at least three mutually communicated water hammer eliminating structures, wherein each water hammer eliminating structure comprises a buffer unit, water energy consumable units symmetrically arranged at the upper end and the lower end of the buffer unit, and a communication channel for communicating the buffer unit and the water energy consumable units; the buffer unit comprises a spherical tank body (5) and an ellipsoidal rubber bag (6) sleeved in the spherical tank body (5); a first buffer cavity (7) is formed between the inner wall of the spherical tank body (5) and the outer part of the ellipsoidal rubber bag (6); the water energy consumable unit comprises an 2/3 ellipsoid tank (8) and a spherical buffer air bag (2) arranged at the upper part of the 2/3 ellipsoid tank (8); a second buffer cavity (3) is formed between the inner wall of the 2/3 ellipsoidal tank (8) and the outside of the spherical buffer airbag (2); the communicating channel comprises a self-oscillating pulse jet nozzle (4); the self-oscillation pulse jet nozzle (4) is in a horn mouth shape; the self-oscillation pulse jet nozzle (4) is opened towards the water energy consumable unit; the trumpet-shaped outlet of the self-oscillation pulse jet nozzle (4) is positioned at the lower focal point of the 2/3 ellipsoid tank (8), and the spherical center of the spherical buffer air bag (2) is superposed with the upper focal point of the 2/3 ellipsoid tank (8).

2. The in-line tandem water hammer arrestor of claim 1 wherein the water hammer arrestor at both ends is connected to a fluid line by a flange.

3. The straight-through serial water hammer eliminating device according to claim 1 or 2, wherein the buffer units of two adjacent water hammer eliminating structures are communicated through a pipeline; and the water energy consumable units of the two adjacent water hammer eliminating structures are communicated through a pipeline.

4. The straight-through tandem water hammer arrestor of claim 1 or 2 wherein the diameter of the upstream communicating tube (9) is larger than the diameter of the downstream communicating tube (10).

5. The straight-through serial water hammer eliminating device according to claim 3, wherein the top end of the water energy consumable unit is connected with an inflating nozzle (1) with a pressure gauge; the inflating nozzle (1) with the pressure gauge is connected with the spherical buffering air bag (2).

6. The straight-through serial water hammer removing device as claimed in claim 1, 2 or 5, wherein the surface of the ellipsoidal rubber bladder (6) is concave-convex; the surface of the spherical buffering air bag (2) is concave-convex.

7. The straight-through serial connection type water hammer removing device according to claim 1, 2 or 5, wherein the water hammer removing structure is arranged in bilateral symmetry with a central axis of the self-oscillation pulse jet nozzle (4) as a central axis; the water hammer eliminating structure is arranged up and down symmetrically by taking the central axis of the ellipsoidal rubber bag (6) as the central axis.

8. The straight-through serial water hammer eliminating device according to claim 1, 2 or 5, wherein the diameter of the water inlet of the self-oscillating pulse jet nozzle (4) is half of the diameter of the communication pipeline between every two water hammer eliminating structures.

9. The straight-through serial water hammer eliminating device according to claim 8, wherein the self-oscillating pulse jet nozzle (4) has a water inlet diameter equal to a water outlet diameter.

10. The straight-through serial water hammer removing device according to claim 1, 2, 5 or 9, wherein the first buffer chamber (7) is filled with purified water.

11. The straight-through serial water hammer removing device according to claim 1, 2, 5 or 9, wherein the spherical buffering air bag (2) is filled with gas.

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