CN210128171U - Water hammer crushing device for inlet pipeline of self-sucking pump - Google Patents

Abstract

The utility model provides a water hammer breaker of self priming pump inlet pipeline, include: one end of the reflection pipeline is communicated with a water outlet of the pump inlet pipe; the take-off partition plate is arranged at the other end of the reflection pipeline and is provided with a through hole; the offset ball plug is placed on the through hole; the outlet of the nozzle faces the water inlet and is communicated with the water inlet of the pump inlet pipe; the bottom of the liquid collecting chamber is communicated with an inlet of the nozzle; the pipeline shell is internally provided with an offset clapboard, a primary baffle, a secondary clapboard, an impeller and a tertiary clapboard to form a high-pressure pipeline, a low-pressure pipeline, a primary pressure relief chamber, a secondary pressure relief chamber and a tertiary pressure relief chamber; the utility model discloses can select different pressure release pipelines according to the produced pressure size when closing the thrust valve, reduce the impact destruction in the import pipe to the energy ripples that can utilize the previous stage to collect offsets the rivers impact of next stage, realizes the breakage to the water hammer.

Description

Water hammer crushing device for inlet pipeline of self-sucking pump

Technical Field

The utility model relates to a water hammer breaker especially relates to a water hammer breaker of self priming pump inlet pipeline.

Background

The self priming pump is after the start-up process, for guaranteeing to remain a certain amount of start-up circulating water in the pump, can move rapidly when making things convenient for the self priming pump to start once more, can be at the installation thrust valve of the inlet pipe delivery port department of pump. When the self priming pump operation was ended, the thrust valve can be closed rapidly, seals the self priming pump, stores the start-up circulating water. However, when the thrust valve is closed, the flow velocity of water in the inlet pipe changes suddenly, and under the inertia action of pressure water flow, water flow shock waves are generated, so that the pipeline is broken due to local overpressure, the pipeline vibrates strongly, the pipeline joint is broken, and even the thrust valve is damaged, and normal water conservancy transportation is affected.

SUMMERY OF THE UTILITY MODEL

Exist not enoughly among the prior art, the utility model provides a water hammer breaker of self priming pump inlet pipeline can select different pressure release pipelines according to the produced pressure size when closing the thrust valve, reduces the impact destruction in the import pipe. And, can collect the rivers after the pressure release, the energy wave that utilizes the previous stage to collect offsets the rivers impact of next stage to realized the breakage to the water hammer, ensured the safe and stable operation of self priming pump inlet pipeline.

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

The utility model provides a water hammer breaker of self priming pump inlet pipeline, installs on pump inlet pipe, pump inlet pipe has delivery port and water inlet, include:

one end of the reflection pipeline is communicated with the water outlet;

the take-off partition plate is arranged at the other end of the reflection pipeline and is provided with a through hole;

the bias ball plug is placed on the through hole and can seal the through hole;

the axis of the nozzle is intersected with the axis of the pump inlet pipe, and the outlet of the nozzle faces the water inlet and is communicated with the water inlet;

the inlet of the nozzle is communicated with the bottom of the liquid collecting chamber; and

the device comprises a pipeline shell, a reflection pipeline and a control device, wherein one end of the pipeline shell is closed, the other end of the pipeline shell is connected with the other end of the reflection pipeline, and a drainage hole is formed in the pipeline shell;

the pipeline shell is internally provided with a bias clapboard, a second-stage baffle, an impeller and a third-stage baffle, the bias clapboard is in a circular arc shape and is arranged close to the bias ball plug to divide the pipeline shell into a high-pressure pipeline and a low-pressure pipeline which are parallel, one end of the low-pressure pipeline is positioned right above the bias ball plug, the second-stage baffle is arranged at one end of the high-pressure pipeline far away from the bias ball plug, the inner wall of the high-pressure pipeline is provided with an annular first-stage baffle, a first-stage pressure relief chamber is formed between the first-stage baffle and the second-stage baffle, the second-stage baffle is provided with a plurality of jet flow through holes, a first elastic mechanism is arranged in the first-stage pressure relief chamber, the first-stage baffle can be sealed in an initial state;

the three-stage partition plate is positioned between the second-stage baffle and the closed end of the pipeline shell and partitions the pipeline shell, a three-stage pressure relief chamber is formed between the three-stage partition plate and the closed end of the pipeline shell, the drain hole is communicated with the three-stage pressure relief chamber and the liquid collecting chamber, a diffusion hole is formed in the three-stage partition plate, a second elastic mechanism is arranged in the three-stage pressure relief chamber and can seal the diffusion hole in an initial state, and the second elastic mechanism is far away from the diffusion hole under the action of external force;

a secondary pressure relief chamber is formed between the secondary baffle and the tertiary baffle and communicated with the low-pressure pipeline, and the impeller is coaxially arranged in the secondary pressure relief chamber.

Preferably, the first elastic mechanism comprises a primary spring and a primary spring base plate, the primary spring is connected with the secondary baffle and the primary spring base plate, the primary spring base plate is attached to the primary baffle and seals the primary baffle in an initial state, and the primary spring is in a compressed state;

the second elastic mechanism comprises a thrust partition plate secondary spring, the secondary spring is connected with the closed end of the pipeline shell and the thrust partition plate, the secondary spring is in a free state in an initial state, and the thrust partition plate is attached to the third partition plate and seals the diffusion holes.

Preferably, the inner wall of the nozzle tapers in the direction of the water flow.

Preferably, the number of the blades of the impeller is odd, and the lengths of all the blades of the impeller are in an equal difference number sequence in sequence.

Preferably, the angle α formed between the axis of the nozzle and the axis of the pump inlet tube is 45 °.

Preferably, the center of the ball of the offset ball plug is located above the take-off partition plate, and the distance between the center of the ball of the offset ball plug and the take-off partition plate is one fourth of the diameter of the offset ball plug.

Preferably, the number of the jet through holes is four, and the four jet through holes are uniformly distributed along the circumferential direction by taking the axis of the secondary baffle as the center;

the number of diffusion hole is four, four the efflux through-hole use the axis of tertiary baffle is along circumference evenly distributed as the center, the efflux through-hole with crisscross the distribution between the diffusion hole, just the efflux through-hole with the diameter ratio between the diffusion hole is 1: 2.

preferably, the axis of the reflection line is at an angle β of 70 ° to the axis of the pump inlet tube.

Preferably, one end surface of the offset partition plate, which is close to the offset ball plug, is an arc surface, and the radius of the arc surface is one third of that of the offset ball plug.

Preferably, the primary spring cushion plate and the thrust partition plate are both made of resin materials.

The utility model has the advantages that:

1) the utility model discloses whole device is installed on pump import pipe, and the pressure value according to water hammer is produced to delivery port department is different to make rivers shock wave pass through high-pressure line or low-pressure line and reinject into water inlet department again, strike the breakage to next stage rivers shock wave, the utility model discloses in adopt continuous tertiary pressure release room, carry out the pressure release to high-pressure rivers shock wave in proper order, and carry out appropriate speed-raising to the rivers shock wave after weakening, collect the energy that last stage rivers shock wave produced, offset the rivers shock wave that next stage is about to get into pump import pipe, effectively utilize when the water hammer takes place to the part harmful local high pressure shock wave

2) The utility model discloses an asymmetric inequality footpath impeller for rivers shock wave produces great circumference disturbance behind the impeller, has an amount of rotatory momentum, when assaulting the breakage with next-level rivers shock wave, can utilize the incoming flow shock wave that has the rotation to weaken next-level incoming flow, reduces the import pipe and assaults the produced noise and vibration of in-process.

3) The utility model discloses a nozzle internal diameter is along the inner wall of rivers direction along rivers direction convergent to contained angle between the axis of nozzle and the axis of pump import pipe is 45, is favorable to further promoting the speed of rivers shock wave, reinforcing and the offset energy of next-level incoming flow impact. Meanwhile, the same axial and radial velocity components can be generated, on one hand, the radial velocity component can enhance the circumferential rotational inertia of the high-speed jet flow sprayed by the nozzle, and on the other hand, the energy impacting with the secondary incoming flow in the axial direction is enhanced.

4) The utility model discloses a thrust baffle among the second elastic mechanism can effectively avoid in the factor level rivers shock wave too big, and the device operates according to the reverse, causes the damage to spare part.

5) The one-level spring backing plate and the thrust baffle are both made of resin materials, the surface is smooth, deflection blocking cannot be generated, meanwhile, the material does not absorb water, the wear resistance is high, the material is not easy to damage, and frequent replacement is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a water hammer breaking device of a self-priming pump inlet pipeline according to the utility model discloses.

Reference numerals:

1-water outlet; 2-a reflection pipeline; 3-a take-off baffle plate; 4-offset ball plunger; 5-low pressure pipeline; 6-offset spacer plate; 7-high pressure pipeline; 8-first-stage baffle; 9-first-level spring backing plate; 10-a primary spring; 11-a primary pressure relief chamber; 12-a secondary baffle; 13-jet through holes; 14-a secondary pressure relief chamber; 15-a rotating shaft; 16-an impeller; 17-a third-stage clapboard; 18-diffusion holes; 19-a thrust spacer; 20-a secondary spring; 21-tertiary pressure relief chamber; 22-a drain hole; 23-a liquid collecting chamber; 24-a sump outlet pipe; 25-a nozzle; 26-water inlet.

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 specifically describes a water hammer crusher device of a self-priming pump inlet pipeline according to an embodiment of the present invention with reference to the accompanying drawings.

Referring to fig. 1, according to the embodiment of the present invention, a water hammer breaking device for an inlet pipeline of a self-priming pump is installed in a pump inlet pipe, the pump inlet pipe has a water outlet 1 and a water inlet 26, and the water hammer breaking device includes a reflection pipeline 2, a take-off partition plate 3, a biased ball plug 4, a nozzle 25, a liquid collecting chamber 23, and a pipeline housing.

Specifically, one end of the reflection pipeline 2 is communicated with the water outlet 1, an included angle β between the axis of the reflection pipeline 2 and the axis of the pump inlet pipe is 70 degrees, the take-off partition plate 3 is arranged at the other end of the reflection pipeline 2, a through hole is formed in the take-off partition plate 3, the offset ball plug 4 is placed on the through hole, the offset ball plug 4 can seal the through hole, after the self-priming pump runs, a thrust valve at the inlet of the self-priming pump is closed, local high pressure is rapidly generated at the outlet of the pump inlet pipe in a short time, when the generated local pressure is too large, water flow impact waves fill the whole reflection pipeline 2, and the offset ball plug 4 bounces.

One end of the pipeline shell is closed, the other end of the pipeline shell is connected with the other end of the reflection pipeline 2, and a discharge hole 22 is formed in the pipeline shell. The pipeline shell is internally provided with an offset clapboard 6, a second-stage baffle 12, an impeller 16 and a third-stage clapboard 17, wherein the offset clapboard 6 is in a circular arc shape and is arranged close to an offset ball plug 4, a part of pipeline of the pipeline shell is divided into a high-pressure pipeline 7 and a low-pressure pipeline 5 which are parallel, one end of the low-pressure pipeline 5 is positioned right above the offset ball plug 4, preferably, one end surface of the offset clapboard 6 close to the offset ball plug 4 is in a circular arc shape, and the radius of the circular arc shape is one third of the radius of the offset ball plug 4, so that after a water flow shock wave collides with the offset ball plug 4, the offset ball plug 4 enters the low-pressure pipeline 5 to block the inlet of the low-pressure pipeline 5, and at the moment, the reflection.

The secondary baffle 12 is arranged at one end, far away from the offset ball plug 4, of the high-pressure pipeline 7, the annular primary baffle 8 is arranged on the inner wall of the high-pressure pipeline 7, the height, protruding out of the inner wall face of the high-pressure pipeline 7, of the primary baffle 8 is one eighth of the inner diameter of the high-pressure pipeline 7, a primary pressure relief chamber 11 is formed between the primary baffle 8 and the secondary baffle 12, a first elastic mechanism is arranged in the primary pressure relief chamber 11, the primary baffle 8 can be sealed in the initial state, and the first elastic mechanism is far away from the primary baffle 8 under the. Preferably, the first elastic mechanism in this embodiment includes a primary spring 10 and a primary spring pad 9, the primary spring connects the secondary baffle 12 and the primary spring pad 9, in an initial state, the primary spring pad 9 is attached to the primary baffle 8 and seals the primary baffle 8, and the primary spring 10 is in a compressed state. The high-pressure water flow shock wave firstly collides with the first-stage baffle plate 8 through the high-pressure pipeline 7 to offset part of energy, and the rest high-pressure water flow shock waves bypass the first-stage baffle plate 8 and impact on the first-stage spring base plate 9. Because the primary spring 10 is in a compressed state, the water flow shock wave needs to overcome a large resistance to push the primary spring cushion plate 9 to separate from the surface of the primary baffle plate 8, so that the high-pressure pipeline 7 is communicated with the primary pressure relief chamber 11, and at the moment, the energy of the high-pressure water flow shock wave is greatly reduced.

The secondary baffle 12 is provided with a plurality of jet through holes 13, preferably, the number of the jet through holes 13 in the embodiment is four, the four jet through holes 13 are uniformly distributed along the circumferential direction by taking the axis of the secondary baffle as the center, and the high-pressure water flow shock wave passes through the primary spring backing plate 9, passes through the jet through holes 13 with smaller diameters on the secondary baffle 12 after the energy is greatly reduced, and is appropriately accelerated.

The third-stage partition plate 17 is positioned between the second-stage baffle plate 12 and the closed end of the pipeline shell and partitions the pipeline shell, a third-stage pressure relief chamber 21 is formed between the third-stage partition plate 17 and the closed end of the pipeline shell, a second-stage pressure relief chamber 14 is formed between the second-stage baffle plate 12 and the third-stage partition plate 17, the second-stage pressure relief chamber 14 is communicated with the low-pressure pipeline 5, the impeller 16 is installed on the rotating shaft 15, and the rotating shaft 15 is coaxially arranged in the second-stage pressure relief. The water flow shock wave accelerated by the jet flow through hole 13 impacts the blade surface of the impeller 16 in the secondary pressure relief chamber 14, the impeller 16 is provided with 7 blades, the lengths of the 7 blades are different, an equal-difference series form is presented in sequence, the secondary pressure relief chamber 14 can effectively generate an uneven flow field by adopting odd-numbered blades, and the 7 blades with unequal lengths are favorable for generating rotational inertia around the rotating shaft 15, so that circumferential disturbance in the secondary pressure relief chamber 14 is enhanced.

Be equipped with a plurality of diffusion holes 18 on the tertiary baffle 17, as preferred, the number of diffusion hole 18 in this embodiment is four, and four efflux through-hole 13 use the axis of tertiary baffle 17 as the center along circumference evenly distributed, crisscross distribution between efflux through-hole 13 and the diffusion hole 18, and the diameter ratio between efflux through-hole 13 and the diffusion hole 18 is 1: 2. the water flow shock wave with the moment of inertia passes through the jet flow through holes 13, and the circumferential disturbance is further enhanced.

A second elastic mechanism is arranged in the third-stage pressure relief chamber 21, the diffusion hole 18 can be sealed in the initial state, and the second elastic mechanism is far away from the diffusion hole 18 under the action of external force; preferably, the second elastic mechanism in this embodiment includes a thrust partition 19 and a second-stage spring 20, the second-stage spring 20 connects the closed end of the pipe casing and the thrust partition 19, and in the initial state, the second-stage spring 20 is in a free state, and the thrust partition 19 is attached to the third-stage partition and seals the diffusion hole 18. The ratio of the elastic modulus of the primary spring 10 to the secondary spring 20 is 2: 1, the ratio of the spring section circular diameter of the primary spring 10 to the spring section circular diameter of the secondary spring 20 is 2: 1, the resistance is obviously reduced compared with the primary spring cushion plate 9, when the water flow shock wave with circumferential disturbance flowing out of the jet flow through hole 13 impacts the surface of the thrust partition plate 19, the thrust partition plate 19 is separated from the surface of the tertiary partition plate 17, and along with the continuous compression of the secondary spring 20, the side surface of the thrust partition plate 19 does not block the discharge hole 22 at the bottom end of the tertiary pressure relief chamber 21 any more, so that the water flow shock wave enters the tertiary pressure relief chamber 21.

The drain hole 22 is communicated with the tertiary pressure relief chamber 21 and the liquid collection chamber 23, the bottom end of the liquid collection chamber 23 is communicated with the inlet of the nozzle 25 through the liquid collection outlet pipe 24, and the side face of the thrust baffle plate 19 does not block the drain hole 22 at the bottom end of the tertiary pressure relief chamber 21 with the continuous compression of the secondary spring 20, so that the water flow shock wave with circumferential disturbance entering the tertiary pressure relief chamber 21 passes through the drain hole 22 and enters the liquid collection chamber 23. At this time, the high-speed water flow shock wave in the liquid collecting chamber 23 has a high circumferential inertia moment, and enters the nozzle 25 along with the liquid collecting outlet pipe 24.

The included angle α between the axis of the nozzle 25 and the axis of the pump inlet pipe is 45 degrees, the inner wall of the nozzle 25 is tapered along the water flow direction, the contraction angle is 10 degrees, the nozzle 25 adopting the tapered structure is beneficial to further improving the speed of water flow shock wave and enhancing the offset energy of the impact with the next-stage incoming flow, meanwhile, the included angle between the central axis of the nozzle 25 and the axis of the pump inlet pipe is 45 degrees, the same axial and radial velocity components with the same size can be generated, on one hand, the radial velocity component can enhance the circumferential rotational inertia of the high-speed jet flow sprayed by the nozzle 25, and on the other hand, the energy of the impact with the secondary incoming flow in the axial direction is enhanced.

After the self priming pump operation, the thrust valve of self priming pump import is closed, and when the partial pressure that produces in pump import pipe exit was less, rivers shock wave constantly upwards stretchs along 2 left side walls of reflection pipeline, at first contacts 4 left sides lower surfaces of biasing ball stopper, consequently produces the power of right slope to biasing ball stopper 4 for biasing ball stopper 4 bounces right and blocks up high-pressure pipeline 7. At the moment, the water flow shock wave directly enters the secondary pressure relief chamber 14 along the low-pressure pipeline 5 and does not pass through the primary pressure relief chamber 11 with high resistance, so that after the rotational inertia of the secondary pressure relief chamber 14 is enhanced, the water flow shock wave passes through the diffusion hole 18 with larger diameter, pushes the thrust baffle plate 19 and the discharge hole 22 to generate dislocation, enters the liquid collection chamber 23, finally enters the water inlet of the pump inlet pipe through the nozzle 25 and is mutually offset with the next stage shock wave.

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. The utility model provides a water hammer breaker of self priming pump inlet pipeline, installs on pump inlet pipe, pump inlet pipe has delivery port (1) and water inlet (26), its characterized in that includes:

one end of the reflection pipeline (2) is communicated with the water outlet (1);

the take-off partition plate (3) is arranged at the other end of the reflection pipeline (2), and a through hole is formed in the take-off partition plate (3);

a biased ball plug (4) placed on the through hole, the biased ball plug (4) being capable of sealing the through hole;

a nozzle (25), the axis of the nozzle (25) intersecting the axis of the pump inlet pipe, the outlet of the nozzle (25) facing the water inlet (26) and communicating with the water inlet (26);

a liquid collection chamber (23), wherein an inlet of the nozzle (25) is communicated with the bottom of the liquid collection chamber (23); and

one end of the pipeline shell is closed, the other end of the pipeline shell is connected with the other end of the reflection pipeline (2), and a drainage hole (22) is formed in the pipeline shell;

wherein be equipped with biasing baffle (6), second grade baffle (12), impeller (16) and tertiary baffle (17) in the pipeline casing, biasing baffle (6) are the arc surface shape, are close to biasing ball stopper (4) set up, will the pipeline casing separates for parallel high-pressure line (7) and low-pressure line (5), the one end of low-pressure line (5) is located directly over biasing ball stopper (4), second grade baffle (12) set up in the one end that high-pressure line (7) kept away from biasing ball stopper (4), be equipped with annular one-level baffle (8) on the inner wall of high-pressure line (7), form one-level pressure relief room (11) between one-level baffle (8) and second grade baffle (12), be equipped with a plurality of efflux through-hole (13) on second grade baffle (12), be equipped with first elastic mechanism in one-level pressure relief room (11), the primary baffle (8) can be sealed in an initial state, and the first elastic mechanism is far away from the primary baffle (8) under the action of external force;

the three-stage partition plate (17) is positioned between the two-stage baffle plate (12) and the closed end of the pipeline shell and separates the pipeline shell, a three-stage pressure relief chamber (21) is formed between the three-stage partition plate (17) and the closed end of the pipeline shell, the drain hole (22) is communicated with the three-stage pressure relief chamber (21) and the liquid collection chamber (23), a diffusion hole (18) is formed in the three-stage partition plate (17), a second elastic mechanism is arranged in the three-stage pressure relief chamber (21), the diffusion hole (18) can be sealed in an initial state, and the second elastic mechanism is far away from the diffusion hole (18) under the action of external force;

a secondary pressure relief chamber (14) is formed between the secondary baffle plate (12) and the tertiary partition plate (17), the secondary pressure relief chamber (14) is communicated with the low-pressure pipeline (5), and the impeller (16) is coaxially arranged in the secondary pressure relief chamber (14).

2. The water hammer breaking device for the self-priming pump inlet pipeline according to claim 1, wherein the first elastic mechanism comprises a primary spring (10) and a primary spring backing plate (9), the primary spring connects the secondary baffle (12) and the primary spring backing plate (9), in an initial state, the primary spring backing plate (9) is attached to the primary baffle (8) and seals the primary baffle (8), and the primary spring (10) is in a compressed state;

the second elastic mechanism comprises a thrust partition plate (19) and a second-stage spring (20), the second-stage spring (20) is connected with the closed end of the pipeline shell and the thrust partition plate (19), in an initial state, the second-stage spring (20) is in a free state, and the thrust partition plate (19) is attached to the third-stage partition plate and seals the diffusion holes (18).

3. The water hammer break up device of a self primer pump inlet line of claim 1, wherein the inner wall of the nozzle (25) is tapered in the direction of water flow.

4. The water hammer crusher of self-primer pump inlet pipeline of claim 1, characterized in that the number of the blades of said impeller (16) is odd, and the lengths of all the blades of said impeller (16) are in sequence in an arithmetic progression.

5. The water hammer break apparatus of the self-primer pump inlet line of claim 1, wherein the angle α formed between the axis of the nozzle (25) and the axis of the pump inlet tube is 45 °.

6. The water hammer breaking device for the self-priming pump inlet line according to claim 1, characterized in that the center of the ball of the offset ball plunger (4) is located above the tripping partition (3), and the distance between the center of the ball of the offset ball plunger (4) and the tripping partition (3) is one quarter of the diameter of the offset ball plunger (4).

7. The water hammer breaking device of the self-priming pump inlet pipeline according to claim 1, wherein the number of the jet through holes (13) is four, and the four jet through holes (13) are uniformly distributed along the circumferential direction by taking the axis of the secondary baffle as the center;

the number of diffusion hole (18) is four, four efflux through-hole (13) use the axis of tertiary baffle (17) is along circumference evenly distributed as the center, efflux through-hole (13) with crisscross distribution between diffusion hole (18), just efflux through-hole (13) with the diameter ratio between diffusion hole (18) is 1: 2.

8. the water hammer breaking device of a self-primer pump inlet pipe of claim 1, wherein the angle β between the axis of the reflection pipe (2) and the axis of the pump inlet pipe is 70 °.

9. The water hammer breaking device for the self-priming pump inlet pipeline according to claim 1, wherein an end surface of the offset partition plate (6) close to the offset ball plunger (4) is an arc surface, and the radius of the arc surface is one third of the radius of the offset ball plunger (4).

10. The water hammer breaking device for the self-priming pump inlet pipeline according to claim 2, wherein the primary spring shim plate (9) and the thrust baffle plate (19) are both made of resin materials.

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