CN114060642B - Waterproof hammer device with flexible sealing structure for water feeding pipeline - Google Patents
Waterproof hammer device with flexible sealing structure for water feeding pipeline Download PDFInfo
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- CN114060642B CN114060642B CN202210030783.2A CN202210030783A CN114060642B CN 114060642 B CN114060642 B CN 114060642B CN 202210030783 A CN202210030783 A CN 202210030783A CN 114060642 B CN114060642 B CN 114060642B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/055—Valves therefor
Abstract
The invention relates to the technical field of water hammer effect suppression, in particular to a waterproof hammer device with a flexible sealing structure for a water feeding pipeline, which comprises a water feeding pipe, a negative pressure tank, a discharge pipe, a pressure relief assembly and a reverse pushing assembly, wherein the water feeding pipe comprises an inlet section, a transition section and an outlet section which are sequentially connected, the inlet section and the outlet section are horizontal, the transition section is vertical, the inlet section is provided with a first venturi, the side wall of the outlet section is connected with the pressure relief assembly, the pressure relief assembly is connected with the discharge pipe, the other end of the discharge pipe is connected to the negative pressure tank, the negative pressure tank is also connected to the first venturi, one end of the reverse pushing assembly extends into the transition section, and the other end of the reverse pushing assembly extends into the discharge pipe; when the pressure relief assembly detects that the pressure in the mouth section rises and exceeds the highest water pressure of the water network, the pressure relief assembly opens a channel from the outlet section to the discharge pipe, the reverse thrust assembly receives the kinetic energy of flow in the discharge pipe to push and rotate, and the reverse thrust assembly is positioned at one end in the transition section and gives the acting force of the water flow towards the inlet section. Harvesting energy from the discharged body of water inhibits further exacerbation of the water hammer effect.
Description
Technical Field
The invention relates to the technical field of water hammer effect suppression, in particular to a water hammer preventing device with a flexible sealing structure for a water feeding pipeline.
Background
When the water flowing in the pipeline stops flowing suddenly, due to self inertia, the water on the incoming flow side of the closing point still has forward kinetic energy, the energy impacts on the closing point to cause the pressure to rise sharply and the pressure is transmitted backwards, the phenomenon is serious in a water feeding section of a water supply pipeline, because the water supply pipeline is generally thick, the flow passing through the water supply pipeline is large, the inertial kinetic energy is more, generally speaking, when the municipal water network pressure enters a small area, the municipal water network pressure has initial pressure of about 0.3-0.5 MPa, users on a lower layer directly take the municipal water network pressure, users on a higher layer supply water by secondary pressurization, and a water hammer often occurs on the water feeding pipeline.
Some water hammer effects are caused by quick closing of a valve and full-pressure starting of an electric pump, the water hammer can be eliminated by changing an operation mode, but some water hammer effects are not easy to inhibit in advance, such as fault shutdown of the water pump, power-off closing of an electric valve and the like, the water hammer caused by the conditions needs to be inhibited by certain means, otherwise, when the water hammer effect occurs, the pressure at the position of a closing point can reach dozens of times of the pressure of a water network, and deformation and breakage of a pipeline at the position can be caused, or the water pump and the valve can be damaged.
The water hammer preventing device in the prior art is generally of a cavity structure, pressure gas is stored in the cavity, when a water hammer occurs, water is discharged into the cavity, the pressure borne by a pipeline is relieved, and after the water hammer is eliminated, the water in the cavity is squeezed into the water pipe again by the high-pressure gas. The water hammer device has the advantages that the water hammer device can resist increased pressure through the self strength, the mounting point of the device still needs to have larger pressure bearing performance, the sealing performance of the connecting structure also needs to be guaranteed, the flexible seal can fully adapt to errors and deformation in the pipeline mounting process, but the pressure bearing capacity is not enough, the hard seal can bear higher pressure, but the sealing performance of the hard seal and the sealing ring is reduced sharply due to the fact that the flange bolt pretightening force is not proper when the pipeline deforms slightly, the water hammer effect cannot be fully eliminated due to the fact that the water hammer is supported through the self strength in most of existing waterproof hammer structures, although the highest pressure of the water hammer is reduced when the existing waterproof hammer structures are not installed, when the water hammer is caused by certain factors, 3-6 times of water hammer pressure still exists near the device, most of water net equipment can bear the pressure, however, the service life of the device is still reduced due to the multiple water hammer actions, the existing waterproof hammer device is not suitable for a flexible sealing mode, a hard seal is needed to have large bearing capacity, and the installation accuracy requirement of the waterproof hammer device is improved.
Disclosure of Invention
The invention aims to provide a waterproof hammer device with a flexible sealing structure for a water feeding pipeline, which aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a waterproof hammer device with a flexible sealing structure for a water feeding pipeline comprises a water feeding pipe, a negative pressure tank, a discharge pipe, a pressure relief assembly and a reverse pushing assembly, wherein the water feeding pipe comprises an inlet section, a transition section and an outlet section which are sequentially connected, the inlet section and the outlet section are horizontal, the transition section is vertical, a first venturi tube is arranged on the inlet section, the side wall of the outlet section is connected with the pressure relief assembly, the pressure relief assembly is connected with the discharge pipe, the other end of the discharge pipe is connected to the negative pressure tank, the negative pressure tank is also connected to the first venturi tube, the reverse pushing assembly is arranged in a wall surface between the outlet section and the discharge pipe, one end of the reverse pushing assembly extends into the transition section, and the other end of the reverse pushing assembly extends into the discharge pipe;
when the pressure relief assembly detects that the pressure in the opening section rises and exceeds the highest water pressure of the water network, the pressure relief assembly opens a channel from the outlet section to the relief pipe, the reverse thrust assembly is pushed by the flowing kinetic energy in the relief pipe to rotate, and one end of the reverse thrust assembly, which is positioned in the transition section, provides acting force of water flow towards the inlet section;
the two ends of the water supply pipe are connected with the front and the rear water pipes through sealing gaskets.
Under normal working conditions, water inflowing from an inlet section is discharged out of the device through the transition section and the outlet section, the negative pressure tank is pumped by the first venturi tube to be in a low pressure state, the device is positioned at a water feeding section on a water using path, a water hammer is also generated at the position, when the water hammer effect occurs due to improper operation or failure on a rear pipeline, the pressure of the outlet section is obviously increased to exceed the normal water pressure of a water network, the water in the outlet section is discharged to the negative pressure tank through the discharge pipe by the pressure relief assembly, when the overflowing reverse thrust assembly is positioned at one end in the discharge pipe, the overflowing reverse thrust assembly is used as a reverse thrust assembly to rotate, one end of the reverse thrust assembly positioned in the transition section reversely pushes the water to consume the kinetic energy of forward movement of the water, so that the continuous increase of the water pressure on the rear pipeline is inhibited, the energy of forward movement of the water is converted into motive power to inhibit the forward movement of the water to actively inhibit the pressure increase, instead of passively receiving pressure rise, the negative pressure tank enters a low-pressure state through the first venturi tube and serves as a low-pressure position in an abnormal state, the high-pressure position is an outlet section, therefore, a flow path from high pressure to low pressure is constructed, and the reverse thrust assembly obtains motion energy from the flow path. The upper hose both ends are connected with the front and back water pipe through sealed the pad, and the water hammer of initiative restraines and just can let intraductal pressure be in a lower level to, only need the sealed installation that can accomplish the pipeline of flexible sealed pad sealed, no longer need can bear highly compressed stereoplasm and seal and install.
The pressure release subassembly includes the case, elastic component and larynx ring, set up the discharge hole that is linked together on the wall between export section and the discharge tube, the downthehole throat ring of installation of discharge, larynx ring central authorities have the elasticity of being less than the both ends internal diameter and pass through the mouth, the case includes valve ball and valve rod, one side fixed connection valve rod of valve ball towards the discharge tube, the valve rod is kept away from in the one end of export section and is inserted the discharge tube lateral wall, the elastic component sets up in the discharge tube lateral wall and supports the tip of valve rod, the elastic component pushes away the valve rod towards export section, the valve ball diameter is greater than the mouth diameter that passes through of larynx ring intermediate position. The pressure in the bleeder tube is about the pressure in the negative pressure jar, and the pressure in the export section is about water net water pressure, when not being supercharged by follow-up booster pump yet, its water pressure is 0.3~0.5MPa basically, a lower value, when the water hammer effect appears in this application position of use, export section internal pressure is showing and rises, reach several times or ten times of normal water pressure, and when beginning to rise, the pressure differential of valve ball both sides is as long as exceed the elastic resistance that larynx ring and elastic component given, just can open the passageway from export section orientation bleeder tube, let the water enter into the bleeder tube and flow toward the negative pressure jar, thereby promote the reverse thrust subassembly motion in the changeover portion simultaneously overflowing and restrain the water hammer effect.
The elastic piece is a constant force spring, and the elasticity of the constant force spring is greater than the elastic passing resistance of the middle position of the throat ring. The constant force spring has constant elasticity, and the elasticity at the throat ring is that the valve ball disappears once passing through, and water flow in the outlet section pushes the valve ball away, and then only the elastic piece is pressed and water flow is continuously introduced into the discharge pipe. In order to restore the normal back at water pressure in the export section, the shutoff that can reset by oneself of pressure release subassembly, the elasticity of elastic component need be greater than the obstruction force of passing through of larynx ring.
The reverse pushing assembly comprises a middle shaft, reverse pushing blades and a force-borrowing spiral wheel, the middle shaft is rotatably installed in a wall surface between the outlet section and the discharge pipe, the positions, close to the end part, of the middle shaft are respectively provided with the reverse pushing blades and the force-borrowing spiral wheel, the reverse pushing blades are located in the transition section, the force-borrowing spiral wheel is located in the discharge pipe, and the two ends of the middle shaft are supported on the transition section and the inner wall of the discharge pipe through rotating supports.
When water flows through the gravity spiral wheel, the gravity spiral wheel rotates, the rotating middle shaft drives the reverse thrust blade to rotate, and the reverse thrust blade pushes water in the transition section.
The reverse thrust blade is hinged on the middle shaft, the hinge axis of the reverse thrust blade and the middle shaft is staggered and vertical to the axis of the middle shaft, a retracting spring is arranged between the reverse thrust blade and the middle shaft, and the surface of the reverse thrust blade is vertical to the middle shaft in a fully unfolded state. The rotating center shaft drives the reverse thrust blades to rotate, centrifugal force throws the reverse thrust blades out to be unfolded, so that the reverse thrust blades are unfolded to fully cover the transition section overflowing section when the center shaft rotates, when the center shaft does not rotate, namely, water in the water feeding pipe is in a normal state, and when water hammer does not occur, the reverse thrust blades can be folded to the surface of the center shaft, so that the transition section overflowing channel is not shielded, and the overflowing resistance of the water in the normal working state is reduced.
The blade tips of the thrust reverser blades face the inducer. The blade tip of the reverse thrust blade flows towards the water body, so that when the middle shaft rotates and begins to unfold the reverse thrust blade, the overflowing water body can also provide rotating acting force for unfolding the reverse thrust blade, and the blade tip can be unfolded to a working state quickly.
The water hammer preventing device further comprises a pressure reducing and sucking assembly, the pressure reducing and sucking assembly is arranged between the inlet section and the negative pressure tank, and the pressure reducing and sucking assembly promotes the vacuum degree in the negative pressure tank.
The step-down suction component comprises a medium pipe, a suction pipe, a flow resistance, a suction check valve, an inducer pipe wall is connected to one end of the medium pipe, a first venturi tube throat is connected to the other end, a second venturi tube is arranged in the middle of the medium pipe, the first venturi tube is arranged in front of the connection position of the medium pipe and the inducer pipe wall, the flow resistance is arranged on the medium pipe, the flow resistance is located on one side, deviating from the first venturi tube, of the second venturi tube throat, the suction pipe is connected with the second venturi tube throat and a negative pressure tank, the suction check valve is arranged on the suction pipe, the flow direction of the suction check valve is from the negative pressure tank to the second venturi tube, and a discharge check valve is arranged on the discharge pipe and flows to the negative pressure tank from an outlet section. The pressure reduction suction component realizes the purpose of double-stage pressure reduction suction by double-stage utilization of venturi tube effect, the first venturi tube establishes a low-pressure position at the throat part of the first venturi tube through speed-raising and pressure-reducing effects, so that the tail end of the medium tube is low-pressure, the front end of the medium tube is connected with the inlet section, one stream of water is guided from the inlet section and flows through the medium tube, the further low pressure is established at the second venturi tube by the stream of water flowing through the medium tube, and the vacuum degree in the negative pressure tank is improved.
Compared with the prior art, the invention has the following beneficial effects: the device has the advantages that an empty area is vacated at the negative pressure tank through double-stage pressure reduction, when water hammer action occurs at the installation position of the device, the device can be used as a low potential energy position, a high and low pressure source is formed by the device and an outlet section with the pressure starting to rise, a discharge channel with larger pressure difference is established, a force-borrowing structure of a reverse-thrust assembly is installed in the discharge tube, energy is obtained from overflowing water flow to rotate, the energy is transmitted to the position of a reverse-thrust blade to reversely push a water body in a transition section, the further aggravation of the water hammer action is inhibited, and the purpose of active inhibition is achieved;
when the water supply pipe normally overflows the water body in the next period, the water body in the negative pressure tank is sucked by the pressure reduction suction assembly, so that a dead water area is prevented, and preparation is also made for the next possible water hammer effect;
the process of injecting and discharging water in the negative pressure tank is in a breathing mode, and active water hammer suppression is performed by combining the pressure relief assembly and the reverse thrust assembly, so that the water hammer effect is suppressed to be intensified under lower pressure;
pressure drops to the sealing member of link can select for use flexible sealing member, alleviates the installation accuracy demand of device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is view A of FIG. 1;
FIG. 3 is view B of FIG. 1;
FIG. 4 is a schematic diagram of the construction of the reduced pressure suction assembly of the present invention;
FIG. 5 is a schematic view of the installation of the present invention in a water network;
in the figure: 1-water feeding pipe, 11-inlet section, 111-first venturi tube, 12-transition section, 13-outlet section, 2-pressure reduction suction component, 21-medium pipe, 211-second venturi tube, 22-suction pipe, 23-flow resistance, 24-suction one-way valve, 3-negative pressure tank, 4-discharge pipe, 49-discharge one-way valve, 5-pressure discharge component, 51-valve core, 511-valve ball, 512-valve rod, 52-elastic component, 53-throat ring, 59-discharge hole, 6-reverse thrust component, 61-middle shaft, 62-reverse thrust blade, 63-gravity-assisted screw wheel and 69-rotation support.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
a waterproof hammer device with a flexible sealing structure for a water feeding pipeline comprises a water feeding pipe 1, a negative pressure tank 3, a discharge pipe 4, a pressure release component 5 and a reverse pushing component 6, wherein the water feeding pipe 1 comprises an inlet section 11, a transition section 12 and an outlet section 13 which are sequentially connected, the inlet section 11 and the outlet section 13 are horizontal, the transition section 12 is vertical, a first venturi tube 111 is arranged on the inlet section 11, the side wall of the outlet section 13 is connected with the pressure release component 5, the pressure release component 5 is connected with the discharge pipe 4, the other end of the discharge pipe 4 is connected to the negative pressure tank 3, the negative pressure tank 3 is also connected to the first venturi tube 111, the reverse pushing component 6 is arranged in the wall surface between the outlet section 13 and the discharge pipe 4, one end of the reverse pushing component 6 extends into the transition section 12, and the other end of the reverse pushing component extends into the discharge pipe 4;
when the pressure relief assembly 5 detects that the pressure in the outlet section 13 rises and exceeds the highest water pressure of the water network, the pressure relief assembly 5 opens a channel from the outlet section 13 to the discharge pipe 4, the reverse thrust assembly 6 receives the kinetic energy of the flow in the discharge pipe 4 to push and rotate, and the reverse thrust assembly 6 is positioned at one end in the transition section 12 and gives the acting force of the water flow towards the inlet section 11.
As shown in fig. 1, under normal working conditions, the water body flowing in from the inlet section 11 is discharged out of the device through the transition section 12 and the outlet section 13, the first venturi 111 sucks the negative pressure tank 3 to make it in a low pressure state, the device is located in the water feeding section on the water path, the water hammer also occurs at this position, when the water hammer effect occurs due to improper operation or failure on the rear pipeline, the pressure of the outlet section 13 is significantly increased to exceed the normal water pressure of the water network (generally 0.4 to 0.5 MPa), the pressure relief assembly 5 releases the water body in the outlet section 13 to the negative pressure tank 3 through the release pipe 4, when the overflow reverse thrust assembly 6 is located at one end in the release pipe 4, it is used as a motive power to push the reverse thrust assembly 6 to rotate, one end of the reverse thrust assembly 6 located in the transition section 12 reversely pushes the water body to consume its kinetic energy of forward movement, thereby inhibiting the continuous increase of the water pressure on the rear pipeline, which is equivalent to convert the energy of forward movement of the water body into a motive power to inhibit its forward movement, the negative pressure tank 3 is put into a low pressure state through the first venturi tube 111 as a low pressure position in an abnormal state, and the high pressure position is the outlet section 13, so that a flow path from high pressure to low pressure is established, and the thrust reverser assembly 6 obtains motion energy from the flow path.
The pressure relief assembly 5 comprises a valve core 51, an elastic member 52 and a throat ring 53, a relief hole 59 communicated with the wall surface between the outlet section 13 and the relief pipe 4 is arranged on the wall surface, the throat ring 53 is arranged in the relief hole 59, the throat ring 53 is provided with an elastic through hole with the inner diameter smaller than that of two ends in the center, the valve core 51 comprises a valve ball 511 and a valve rod 512, one side, facing the relief pipe 4, of the valve ball 511 is fixedly connected with the valve rod 512, one end, far away from the outlet section 13, of the valve rod 512 is inserted into the side wall of the relief pipe 4, the elastic member 52 is arranged in the side wall of the relief pipe 4 and props against the end part of the valve rod 512, the valve rod 512 is pushed towards the outlet section 13 by the elastic member 52, and the diameter of the valve ball 511 is larger than the diameter of the through hole in the middle position of the throat ring 53. As shown in fig. 1 and 2, the pressure in the discharge pipe 4 is about the pressure in the negative pressure tank 3, which is denoted as P3, and the pressure in the outlet section 13 is about the water pressure of the water network, and when the pressure is not boosted by the subsequent booster pump, the water pressure is basically 0.3-0.5 MPa, which is a lower value, when the water hammer effect occurs at the application position, the pressure in the outlet section 13 is significantly increased to several times or even ten times of the normal water pressure, and when the pressure starts to increase, the pressure difference between the two sides of the valve ball 511 can open the passage from the outlet section 13 to the discharge pipe 4 as long as the pressure difference exceeds the elastic blocking force given by the throat ring 53 and the elastic member 52, so that the water body enters the discharge pipe 4 and flows to the negative pressure tank 3, and the reverse thrust assembly 6 is pushed to move at the same time, thereby reversely thrusting the water flow in the overflow transition section 12 to suppress the water hammer effect.
The elastic member 52 is a constant force spring, and the elastic force of the constant force spring is larger than the elastic passing resistance of the middle position of the throat ring 53. The constant force spring has a constant elastic force, and the elastic force at the throat ring 53 is that the valve ball 511 disappears once passing through, and the water flow in the outlet section 13 pushes away the valve ball 511, and then the water flow is continuously fed into the discharge pipe 4 by only pressing the elastic member 52. In order for the pressure relief assembly 5 to restore itself to the normal state after the water pressure in the outlet section 13 returns, the elastic force of the elastic member 52 needs to be larger than the passing blocking force of the throat ring 53.
The reverse pushing assembly 6 comprises a middle shaft 61, a reverse pushing blade 62 and a force-borrowing spiral wheel 63, wherein the middle shaft 61 is rotatably installed in a wall surface between the outlet section 13 and the discharge pipe 4, the position of the middle shaft 61 close to the end part is respectively provided with the reverse pushing blade 62 and the force-borrowing spiral wheel 63, the reverse pushing blade 62 is positioned in the transition section 12, the force-borrowing spiral wheel 63 is positioned in the discharge pipe 4, and two ends of the middle shaft 61 are supported on the inner walls of the transition section 12 and the discharge pipe 4 through rotating supports 69.
As shown in fig. 1 and 2, when water flows through the gravity-assisted spiral wheel 63, the water rotates, the rotating central shaft 61 drives the thrust reverser blades 62 to rotate, and the thrust reverser blades 62 push water in the transition section 12.
The reverse thrust blade 62 is hinged on the central shaft 61, the hinge axis of the reverse thrust blade 62 and the central shaft 61 is staggered and vertical to the axis of the central shaft 61, a folding spring is further arranged between the reverse thrust blade 62 and the central shaft 61, and the surface of the reverse thrust blade 62 is vertical to the central shaft 61 in the fully unfolded state of the reverse thrust blade 62. As shown in fig. 1 and 3, the rotating central shaft 61 drives the reverse thrust blade 62 to rotate, and the centrifugal force throws out and expands the reverse thrust blade 62, so that the reverse thrust blade 62 expands when the central shaft 61 rotates, the flow cross section of the transition section 12 is fully covered, and when the central shaft 61 does not rotate, namely the water in the water supply pipe is in a normal state, when no water hammer occurs, the reverse thrust blade 62 can be retracted to the surface of the central shaft 61, so that the flow channel of the transition section 12 is not shielded, and the flow resistance of the water in the normal working state is reduced.
The blade tips of the thrust vanes 62 face the inducer 11. As shown in fig. 3, the blade tips of the thrust reverser blades 62 flow toward the water body, and when the thrust reverser blades 62 begin to be deployed by rotating the central shaft 61, the overflowing water body can also provide a rotational force for deploying the thrust reverser blades 62, so that the thrust reverser blades 62 can be rapidly deployed to the working state.
The water hammer preventing device further comprises a pressure reduction suction assembly 2, the pressure reduction suction assembly 2 is arranged between the inlet section 11 and the negative pressure tank 3, and the pressure reduction suction assembly 2 promotes the vacuum degree in the negative pressure tank 3.
The pressure reduction suction component 2 comprises a medium pipe 21, a suction pipe 22, a flow resistance 23 and a suction one-way valve 24, one end of the medium pipe 21 is connected with the pipe wall of the inlet section 11, the other end of the medium pipe is connected with the throat part of the first venturi tube 111, the second venturi tube 211 is arranged in the middle of the medium pipe 21, the connection position of the medium pipe 21 and the pipe wall of the inlet section 11 is arranged in front of the first venturi tube 111, the flow resistance 23 is arranged on the medium pipe 21, the flow resistance 23 is positioned on one side, deviating from the first venturi tube 111, of the second venturi tube 211, the suction pipe 22 is connected with the throat part of the second venturi tube 211 and the negative pressure tank 3, the suction one-way valve 24 is arranged on the suction pipe 22, the inner flow direction of the suction one-way valve is from the negative pressure tank 3 to the second venturi tube 211, and the discharge pipe 4 is provided with a discharge one-way valve 49, the flow direction of which is from the outlet section 13 to the negative pressure tank 3. As shown in fig. 1 and 4, the pressure reducing suction assembly 2 achieves the purpose of double-stage pressure reducing suction by double-stage venturi effect, note that the pressure in the water pipe 1 is P1, the pressure in the medium pipe 21 is P2, the pressure in the negative pressure tank 3 is P3, the first venturi 111 establishes a low pressure position at its throat portion through the pressure reducing action of increasing speed, so that the end of the medium pipe 21 is low pressure, and the front end thereof is connected with the inlet section 11, so that a flow of water is guided from the inlet section 11 to flow through the medium pipe 21, and the flow of water flowing through the medium pipe 21 establishes further low pressure at the second venturi 211, thereby increasing the vacuum degree in the negative pressure tank 3.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a waterproof hammer device that has flexible seal structure that water-supply line used which characterized in that: the water hammer preventing device comprises a water feeding pipe (1), a negative pressure tank (3), a discharging pipe (4), a pressure relief component (5) and a reverse pushing component (6), wherein the water feeding pipe (1) comprises an inlet section (11), a transition section (12) and an outlet section (13) which are sequentially connected, the inlet section (11), the outlet section (13) are horizontal, the transition section (12) is vertical, a first venturi tube (111) is arranged on the inlet section (11), the side wall of the outlet section (13) is connected with the pressure relief component (5), the discharging pipe (4) is connected with the pressure relief component (5), the other end of the discharging pipe (4) is connected to the negative pressure tank (3), the negative pressure tank (3) is further connected to the first venturi tube (111), the reverse pushing component (6) is arranged in the wall surface between the outlet section (13) and the discharging pipe (4), and one end of the reverse pushing component (6) extends into the transition section (12), The other end extends into the discharge pipe (4);
when the pressure relief assembly (5) detects that the pressure in the outlet section (13) rises and exceeds the highest water pressure of a water network, the pressure relief assembly (5) opens a channel from the outlet section (13) to the discharge pipe (4), the reverse thrust assembly (6) receives the flow kinetic energy in the discharge pipe (4) to push the discharge pipe to rotate, and one end of the reverse thrust assembly (6) in the transition section (12) provides acting force for water flow to face the inlet section (11);
and two ends of the water feeding pipe (1) are connected with the front and rear water pipes through sealing gaskets.
2. A flexible seal construction watertight hammer apparatus for water service lines according to claim 1, wherein: the pressure relief assembly (5) comprises a valve core (51), an elastic piece (52) and a throat ring (53), a discharge hole (59) communicated with the wall surface between the outlet section (13) and the discharge pipe (4), a throat ring (53) is arranged in the discharge hole (59), the center of the throat ring (53) is provided with an elastic through opening which is smaller than the inner diameter of the two ends, the valve core (51) comprises a valve ball (511) and a valve rod (512), one side of the valve ball (511) facing the discharge pipe (4) is fixedly connected with the valve rod (512), one end of the valve rod (512) far away from the outlet section (13) is inserted into the side wall of the discharge pipe (4), the elastic piece (52) is arranged in the side wall of the discharge pipe (4) and props against the end part of the valve rod (512), the elastic piece (52) pushes the valve rod (512) towards the outlet section (13), the diameter of the valve ball (511) is larger than that of the through opening at the middle position of the throat ring (53).
3. A flexible seal construction watertight hammer apparatus for water service lines according to claim 2, wherein: the elastic piece (52) is a constant force spring, and the elasticity of the constant force spring is larger than the elastic passing resistance of the middle position of the throat ring (53).
4. A flexible seal construction watertight hammer apparatus for water service lines according to claim 2, wherein: the reverse-thrust assembly (6) comprises a middle shaft (61), reverse-thrust blades (62) and a force-borrowing spiral wheel (63), the middle shaft (61) is rotatably installed in a wall surface between the outlet section (13) and the discharge pipe (4), the positions, close to the end part, of the middle shaft (61) are respectively provided with the reverse-thrust blades (62) and the force-borrowing spiral wheel (63), the reverse-thrust blades (62) are located in the transition section (12), the force-borrowing spiral wheel (63) is located in the discharge pipe (4), and the two ends of the middle shaft (61) are supported on the inner wall of the transition section (12) and the inner wall of the discharge pipe (4) through rotating supports (69).
5. A flexible seal construction watertight hammer apparatus for water service lines according to claim 4, wherein: the reverse thrust blade (62) is hinged to the middle shaft (61), the hinge axis of the reverse thrust blade (62) and the middle shaft (61) is staggered and vertical to the axis of the middle shaft (61), a folding spring is further arranged between the reverse thrust blade (62) and the middle shaft (61), and the surface of the reverse thrust blade (62) is vertical to the middle shaft (61) in the fully unfolded state of the reverse thrust blade (62).
6. A flexible seal arrangement for a water hammer as claimed in claim 5, wherein: the blade tips of the thrust vanes (62) face the inducer (11).
7. A flexible seal construction watertight hammer apparatus for water service lines according to claim 4, wherein: the water hammer preventing device further comprises a pressure reduction suction assembly (2), the pressure reduction suction assembly (2) is arranged between the inlet section (11) and the negative pressure tank (3), and the pressure reduction suction assembly (2) promotes the vacuum degree in the negative pressure tank (3).
8. A flexible seal arrangement for a water hammer as claimed in claim 7, wherein: the pressure reduction suction component (2) comprises a medium pipe (21), a suction pipe (22), a flow resistance (23) and a suction one-way valve (24), one end of the medium pipe (21) is connected with the pipe wall of an inlet section (11), the other end of the medium pipe is connected with the throat of a first venturi pipe (111), a second venturi pipe (211) is arranged in the middle of the medium pipe (21), the connection position of the medium pipe (21) and the pipe wall of the inlet section (11) is ahead of the first venturi pipe (111), the flow resistance (23) is arranged on the medium pipe (21), the flow resistance (23) is arranged on one side, deviating from the first venturi pipe (111), of the second venturi pipe (211), the suction pipe (22) is connected with the throat of the second venturi pipe (211) and the negative pressure tank (3), the suction one-way valve (24) is arranged on the suction pipe (22) and has the internal flow direction from the negative pressure tank (3) to the second venturi pipe (211), and a discharge one-way valve (49) is arranged on the discharge pipe (4) and has the flow direction from an outlet section (13) to the negative pressure tank (3) .
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| CN202210030783.2A CN114060642B (en) | 2022-01-12 | 2022-01-12 | Waterproof hammer device with flexible sealing structure for water feeding pipeline |
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| CN202210030783.2A CN114060642B (en) | 2022-01-12 | 2022-01-12 | Waterproof hammer device with flexible sealing structure for water feeding pipeline |
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| CN114060642B true CN114060642B (en) | 2022-04-01 |
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| CN114636041B (en) * | 2022-04-07 | 2022-11-18 | 安徽农业大学 | Integrated bidirectional pressure regulating device of tank bidirectional pump |
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| CN114060642A (en) | 2022-02-18 |
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