Buffer for reciprocating pump and reciprocating pump assembly

Abstract

The application relates to the field of fluid pipeline gentle pulsation, and discloses a buffer for a reciprocating pump and a reciprocating pump assembly, the buffer comprising a spherical shell (10), a liquid inlet pipe (20) and a liquid outlet pipe (11) connected to the shell (10), the direction of the liquid inlet pipe (20) and the direction of the liquid outlet pipe (11) being staggered with each other to allow the fluid to rotate in the shell (10). Through the technical scheme, the fluid entering or flowing out of the reciprocating pump can be formed into a rotating fluid form, the fluctuation of the fluid is eliminated, and the stability of the fluid is improved; and the rotating fluid is completely generated by the kinetic energy of the fluid itself, without mechanical moving parts, and has the characteristics of wide application range, high reliability, long service life, complete maintenance-free and the like.

Description

Technical Field

[0001] This invention relates to the field of fluid pipeline smoothing pulsation technology, specifically to a buffer for a reciprocating pump, and to a reciprocating pump assembly. Background Technology

[0002] High-pressure reciprocating pumps change the working volume within the pump chamber through the reciprocating motion of the plunger, thereby achieving pump intake and discharge. The working principle of the pump also determines the unevenness of its discharge, resulting in periodic pulsation of pressure in the inlet and outlet pipelines. If the pressure pulsation amplitude exceeds the allowable value, it will cause excessive vibration of the pump body and pipelines, and in severe cases, it will cause the pump to fail to operate normally.

[0003] To effectively control pressure pulsations within pump pipelines, adding buffer tanks at the inlet and outlet of high-pressure reciprocating pumps can simply and effectively suppress these pulsations, reducing the design complexity and workload of the pump's inlet and outlet pipelines. Currently, commonly used buffer tank types for high-pressure reciprocating pump inlets and outlets include air-type, diaphragm-type, and bladder-type buffer tanks. Air-type buffers rely on the compression and expansion of gas to smooth out flow unevenness, but the gas is in direct contact with the transported liquid, causing the gas to dissolve in the liquid. Therefore, an air injection valve or device is required on the buffer to replenish air or inert gas. Diaphragm-type buffers have a small effective buffering capacity due to the small deflection range of the diaphragm and are not suitable for high-pressure applications. The bladder material of bladder-type buffers is unsuitable for high-temperature media. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem of difficulty in suppressing the outlet pressure fluctuation of high-pressure reciprocating pumps under high temperature and high pressure conditions.

[0005] To achieve the above objectives, one aspect of the present invention provides a buffer for a reciprocating pump, wherein the buffer includes a spherical housing, an inlet pipe and an outlet pipe connected to the housing, the orientation of the inlet pipe and the orientation of the outlet pipe being offset from each other to allow fluid to rotate within the housing.

[0006] In some embodiments, the central axis of the inlet pipe is located on a cross-section of the housing parallel to the horizontal plane, and the outlet end of the inlet pipe is connected to a nozzle that is angled upwards to the cross-section.

[0007] In some embodiments, the nozzle is laterally deflected to be angled to the vertical section of the housing passing through the central axis of the inlet pipe.

[0008] In some embodiments, the drain pipe is located below the cross-section, the central axis of the drain pipe is angled to the cross-section, and the central axis of the drain pipe is angled to the longitudinal section of the housing that is perpendicular to the central axis of the inlet pipe.

[0009] In some embodiments, the inner surface of the housing is provided with a groove extending transversely to the orientation of the nozzle.

[0010] In some embodiments, the buffer includes an exhaust pipe connected to the top of the housing.

[0011] In some embodiments, the buffer includes a drain pipe connected to the bottom of the housing.

[0012] In some embodiments, the buffer includes a heat transfer coil wound around the housing.

[0013] On the other hand, this solution also provides a reciprocating pump assembly, wherein the reciprocating pump assembly includes a reciprocating pump, a pipeline connected to the reciprocating pump, and a buffer disposed on the pipeline, wherein the buffer is the buffer for the reciprocating pump described in the above solution.

[0014] In some embodiments, the reciprocating pump assembly includes a motor and a speed reducer that are driven to the reciprocating pump.

[0015] The above technical solution enables the fluid entering or exiting the reciprocating pump to form a rotating fluid, eliminating fluid fluctuations and improving fluid stability. Furthermore, the rotating fluid is generated entirely by the fluid's own kinetic energy, without any mechanical moving parts, and features wide applicability, high reliability, long service life, and complete maintenance-free operation. Attached Figure Description

[0016] Figure 1 This is the front view of the buffer described in this embodiment of the solution;

[0017] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0018] Figure 3 yes Figure 1 Top view;

[0019] Figure 4 This is a partial cross-sectional view of the housing described in this embodiment of the solution;

[0020] Figure 5 This is a schematic diagram of the reciprocating pump assembly described in this embodiment.

[0021] Explanation of reference numerals in the attached figures

[0022] 11-Drain pipe, 12-Sewage pipe, 13-Exhaust pipe, 14-Groove, 20-Inlet pipe, 30-Heat medium coil, 101-Cross section, 102-Longitudinal section, 103-Vertical section, 100-Reciprocating pump, 200-Motor, 300-Reducer, 400-Reciprocating pump, 10-Housing shell. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] This solution provides a buffer for a reciprocating pump, wherein the buffer 100 includes a spherical housing 10, an inlet pipe 20 and an outlet pipe 11 connected to the housing 10, the orientation of the inlet pipe 20 and the orientation of the outlet pipe 11 being offset from each other to allow fluid to rotate within the housing 10.

[0025] The shell 10 is spherical, forming a spherical buffer cavity. The inlet pipe 20 is connected to the shell 10 to inject fluid into it, and the outlet pipe 11 is connected to the shell 10 to discharge the fluid therein.

[0026] The outlet of the inlet pipe 20 and the inlet of the outlet pipe 11 are offset from each other so that the fluid from the inlet pipe 20 is not discharged directly through the outlet pipe 11, but rotates along its inner surface in the housing 10.

[0027] The buffer 100 can be set upstream and / or downstream of the reciprocating pump to effectively suppress fluctuations in the fluid passing through the reciprocating pump. The principle is as follows:

[0028] 1. After the fluctuating high-pressure liquid flow enters the shell 10, it forms a rotating fluid. The rotating fluid rotates at high speed inside the shell 10, and the friction between the rotating fluid and the inner surface of the shell 10 converts some of the kinetic energy into heat energy. 2. The high-speed rotating fluid generates a rotational inertia, similar to a mechanical flywheel, which plays a damping role and weakens the standing wave resonance in the pipeline. 3. The high-speed rotating fluid generates a negative pressure region at the center of the vortex. The liquid contains a certain amount of gas, which is also slightly compressible. Under this dual effect, it can dampen and buffer the fluctuations in flow rate and pressure.

[0029] The buffer in this solution can be connected upstream or downstream of the reciprocating pump, so that the fluid entering or exiting the reciprocating pump forms a rotating fluid, eliminating fluid fluctuations and improving fluid stability. Furthermore, the rotating fluid is generated entirely by the kinetic energy of the fluid itself, without any mechanical moving parts, and has the characteristics of wide applicability, high reliability, long service life, and complete maintenance-free operation.

[0030] The central axis of the inlet pipe 20 is located on a cross-section 101 of the housing 10 that is parallel to the horizontal plane. The outlet end of the inlet pipe 20 is connected to a nozzle that curves upwards at an angle to the cross-section 101. (Reference) Figure 1 and Figure 2 As shown, the cross-section 101 is a plane passing through the center of the shell 10, parallel to the horizontal plane, and divides the shell 10 into two hemispherical shells. The central axis of the inlet pipe 20 passes through the cross-section 101, that is, it is located in the middle of the height direction of the shell 10. The inlet pipe 20 is inserted into the shell 10, and its outlet end is connected to a nozzle. (Refer to...) Figure 2 As shown, the nozzle is tilted upwards to form an angle β1 with the cross-section 101. The fluid injected into the housing 10 through the nozzle rotates along the inner surface of the housing 10 to form a stable rotating fluid.

[0031] Additionally, the nozzle is laterally deflected to form an angle with the vertical sectional plane 103 of the housing 10 passing through the central axis of the inlet pipe 20. (Reference) Figure 3 The vertical section 103 is the surface passing through the central axis of the inlet pipe 20 and the center of the sphere of the housing 10, dividing the housing into two hemispherical shells. The nozzle of the inlet pipe 20 is horizontally deflected, thus forming an angle β2 with the vertical section 103. Figure 2 and Figure 3 As can be seen, the nozzle is tilted upwards and laterally so that the injected fluid flows along the inner surface of the housing 10, thereby forming a rotating fluid.

[0032] The drain pipe 11 is located below the cross-section 101, and its central axis is angled to the cross-section 101. Furthermore, the central axis of the drain pipe 11 is angled to the longitudinal section 102 of the housing 10, which is perpendicular to the central axis of the inlet pipe 20. Figure 3 As shown, the longitudinal section 102 is a plane perpendicular to the central axis of the inlet pipe 20 and passing through the center of the sphere of the shell 10, dividing the shell 10 into two hemispherical shells. Figure 2 As shown, the drain pipe 11 forms an angle β3 with the cross-section 101, and as... Figure 3 As shown, the drain pipe 11 forms an angle β4 with the longitudinal section 102. (Reference) Figure 2 and Figure 3 As can be seen, the nozzle sprays fluid into the upper part of the housing 10 and discharges the fluid through the drain pipe 11 located on the lower part of the housing 10. The drain pipe 11 and the nozzle are located at the lower and upper parts respectively, so that the fluid rotates and flows for a sufficiently long path in the housing 10 before being discharged, ensuring that a stable rotating fluid is formed in the housing 10, i.e., a flywheel-like shape.

[0033] Additionally, the inner surface of the housing 10 is provided with a groove 14 extending transversely to the orientation of the nozzle. The orientation of the nozzle roughly determines the flow direction of the fluid, and the groove 14 is transversely to the flow direction of the fluid. Figure 4 As shown, the high-speed rotating fluid, under the influence of centrifugal force, adheres to the inner wall of the shell 10 and rotates at high speed. Guided by the groove 14, the high-speed rotating fluid in the outer layer generates a swirling flow and impacts the rotating fluid. That is, under the guidance of the groove 14, the outer layer of fluid is diverted and impacts the rotating fluid, reducing the kinetic energy of the rotating fluid. When the kinetic energy of the rotating fluid is high, the diverted kinetic energy is also relatively high; conversely, when the kinetic energy of the rotating fluid is relatively low, the diverted kinetic energy is also reduced, thus achieving a buffering effect on the fluid pulsation.

[0034] Additionally, the buffer 100 includes an exhaust pipe 13 connected to the top of the housing 10. During normal operation of the buffer 100, the exhaust pipe 13 can remain closed. When there is a large amount of gas in the housing 10, the exhaust pipe 13 can be opened to release the gas.

[0035] Additionally, the buffer 100 includes a drain pipe 12 connected to the bottom of the housing 10. After a period of use, a certain amount of solid residue may accumulate in the housing 10, which can be discharged by opening the drain pipe 12. Under normal operating conditions, the drain pipe 12 can remain closed.

[0036] Additionally, the buffer 100 includes a heat transfer coil 30 wound around the housing 10. By circulating a heating medium through the heat transfer coil 30, the housing 10 can be heated, thereby heating the fluid therein and maintaining the fluid at a suitable temperature. Of course, in other embodiments, the housing 10 can also be cooled by circulating fluid in the heat transfer coil 30.

[0037] On the other hand, this solution also provides a reciprocating pump assembly, wherein the reciprocating pump assembly includes a reciprocating pump 400, a pipeline connected to the reciprocating pump 400, and a buffer disposed on the pipeline, the buffer being the buffer 100 for the reciprocating pump described above. The buffer 100 can be disposed on an inlet pipeline connected upstream of the reciprocating pump 400 or a discharge pipeline connected downstream of the reciprocating pump 400, that is, to process the fluid entering and / or discharging from the reciprocating pump 400, so as to reduce the fluctuation of the fluid transported by the reciprocating pump 400.

[0038] Furthermore, the reciprocating pump assembly includes a motor 200 and a reducer 300 that are driveably connected to the reciprocating pump 400. The motor 200 is driveably connected to the reciprocating pump 400 via the reducer 300 to drive the reciprocating pump 400 to operate.

[0039] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A damper for a reciprocating pump, characterized in that, The buffer includes a spherical housing (10), an inlet pipe (20) connected to the housing (10), and an outlet pipe (11), the orientation of the inlet pipe (20) and the orientation of the outlet pipe (11) being offset from each other to allow fluid to rotate in the housing (10); The central axis of the liquid inlet pipe (20) is located on the cross section (101) of the housing (10) that is parallel to the horizontal plane, and the outlet end of the liquid inlet pipe (20) is connected to a nozzle that is curved upward to form an angle with the cross section (101). The nozzle is laterally deflected to be angled to the vertical section (103) of the housing (10) passing through the central axis of the inlet pipe (20); The inner surface of the housing (10) is provided with a groove (14) extending transversely to the direction of the nozzle.

2. The buffer for a reciprocating pump according to claim 1, characterized in that, The drain pipe (11) is located below the cross section (101). The central axis of the drain pipe (11) is set at an angle to the cross section (101), and the central axis of the drain pipe (11) is set at an angle to the longitudinal section (102) of the housing (10) that is perpendicular to the central axis of the inlet pipe (20).

3. The buffer for a reciprocating pump according to claim 1, characterized in that, The buffer (100) includes an exhaust pipe (13) connected to the top of the housing (10).

4. The buffer for a reciprocating pump according to claim 1, characterized in that, The buffer (100) includes a drain pipe (12) connected to the bottom of the housing (10).

5. The buffer for a reciprocating pump according to claim 1, characterized in that, The buffer (100) includes a heat medium coil (30) coiled on the housing (10).

6. A reciprocating pump assembly, characterized in that, The reciprocating pump assembly includes a reciprocating pump (400), a pipeline connected to the reciprocating pump (400), and a buffer disposed on the pipeline, wherein the buffer is a buffer (100) for a reciprocating pump as described in any one of claims 1-5.

7. The reciprocating pump assembly according to claim 6, characterized in that, The reciprocating pump assembly includes a motor (200) and a reducer (300) that are driven to the reciprocating pump (400).

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