Buffer for reciprocating pump and reciprocating pump assembly

Abstract

The invention relates to the field of fluid pipeline smooth pulsation, and discloses a buffer used for a reciprocating pump and a reciprocating pump assembly, the buffer comprises a spherical shell (10), a liquid inlet pipe (20) and a liquid outlet pipe (11), the liquid inlet pipe (20) and the liquid outlet pipe (11) are connected to the shell (10), and the direction of the liquid inlet pipe (20) and the direction of the liquid outlet pipe (11) are staggered to allow fluid to rotate in the shell (10). By means of the technical scheme, fluid entering or discharged out of the reciprocating pump can form a rotary fluid form, fluctuation of the fluid is eliminated, and the stability of the fluid is improved; moreover, the rotating fluid is completely generated by the kinetic energy of the fluid, no mechanical moving part exists, and the device has the advantages of being wide in application range, high in reliability, long in service life, completely free of maintenance and the like.

Description

Technical Field

[0001] The invention relates to the technical field of smooth pulsation of fluid pipelines, in particular to a buffer for a reciprocating pump and a reciprocating pump component. Background Art

[0002] The high-pressure reciprocating pump achieves suction and discharge by changing the working volume in the pump chamber through the reciprocating motion of the plunger. The working principle of the pump also determines the unevenness of its displacement, resulting in periodic pulsation of pressure in the inlet and outlet pipelines. If the pressure pulsation amplitude exceeds the allowable value, the vibration of the pump body and pipeline will exceed the standard, and in severe cases, the pump will not be able to operate normally.

[0003] In order to effectively control the pressure pulsation amplitude in the pump pipeline, adding a buffer tank at the inlet and outlet of the high-pressure reciprocating pump can simply and effectively suppress the pressure pulsation amplitude in the inlet and outlet pipelines, reducing the design difficulty and workload of the inlet and outlet pipelines of the high-pressure reciprocating pump. At present, the commonly used buffer tank types at the inlet and outlet of high-pressure reciprocating pumps are air-type, diaphragm-type, and bladder-type buffer tanks. Since the air-type buffer relies on the compression and expansion of gas to smooth out uneven flow, the gas is in direct contact with the conveying liquid, causing the gas to dissolve in the liquid. An injection valve or injection equipment is required on the buffer to replenish air or inert gas. The diaphragm buffer has a small flexural deformation amplitude of the diaphragm, a small effective buffer capacity, and is not suitable for high-pressure occasions. The bladder material of the bladder-type buffer cannot be used for high-temperature media. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that it is difficult to suppress the outlet pressure fluctuation of a high-pressure reciprocating pump under a high-temperature and high-pressure environment.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a buffer for a reciprocating pump on one hand, wherein the buffer includes a spherical shell, an inlet pipe and a discharge pipe connected to the shell, and the direction of the inlet pipe and the direction of the discharge pipe are staggered with each other to allow the fluid to rotate in the shell.

[0006] In some embodiments, the central axis of the liquid inlet pipe is located on a cross-section of the shell parallel to the horizontal plane, and the outlet end of the liquid inlet pipe is connected to a spray head that is tilted upward to form an angle with the cross-section.

[0007] In some embodiments, the spray head is laterally tilted to form an angle with respect to a vertical section of the housing passing through a central axis of the liquid inlet pipe.

[0008] In some embodiments, the drain pipe is located on the lower side of the cross section, the central axis of the drain pipe is set at an angle to the cross section, and the central axis of the drain pipe is set at an angle to the longitudinal section of the shell 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 direction of the spray head.

[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 medium coil wound on the housing.

[0013] On the other hand, the present 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 arranged on the pipeline, and 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 reducer drivingly connected to the reciprocating pump.

[0015] Through the above technical scheme, the fluid entering or discharged from the reciprocating pump can be formed into a rotating fluid, eliminating the fluctuation of the fluid and improving the stability of the fluid; moreover, the rotating liquid 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, and complete maintenance-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of the buffer described in the implementation mode of the present invention;

[0017] Figure 2 is along Figure 1 Sectional view along line AA;

[0018] Figure 3 yes Figure 1 A top view of

[0019] Figure 4 is a partial cross-sectional view of the housing described in the embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the reciprocating pump assembly described in the implementation scheme of this invention.

[0021] Description of Reference Numerals

[0022] 11-liquid discharge pipe, 12-drain pipe, 13-exhaust pipe, 14-groove, 20-liquid 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. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] The present solution provides a buffer for a reciprocating pump, wherein the buffer 100 includes a spherical shell 10, an inlet pipe 20 and a discharge pipe 11 connected to the shell 10, and the orientation of the inlet pipe 20 and the orientation of the discharge pipe 11 are staggered from each other to allow the fluid to rotate in the shell 10.

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

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

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

[0028] First, the fluctuating high-pressure liquid flow forms a rotating fluid after entering the shell 10. The rotating fluid rotates at a high speed in the shell 10, and the friction between the rotating fluid and the inner surface of the shell 10 converts part of the kinetic energy into heat energy; second, 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; third, the high-speed rotating fluid generates a negative pressure area in the center of the vortex. A certain amount of gas is dissolved in the liquid, which is also slightly compressible. Under such dual effects, it can play a damping and buffering role for the fluctuations of flow and pressure.

[0029] The buffer of this solution can be connected to the upstream or downstream of the reciprocating pump, so that the fluid entering or discharged from the reciprocating pump is in the form of a rotating fluid, eliminating the fluctuation of the fluid and improving the stability of the fluid; and the rotating fluid is completely generated by the kinetic energy of the fluid itself, without mechanical moving parts, and has the characteristics of a wide range of applications, high reliability, long service life, and complete maintenance-free.

[0030] The central axis of the liquid inlet pipe 20 is located on a 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 spray head that is tilted upward to form an angle with the cross-section 101. Figure 1 and Figure 2 As shown, the cross section 101 is a plane passing through the center of the shell 10, which is parallel to the horizontal plane and divides the shell 10 into two hemispherical shells. The central axis of the liquid inlet pipe 20 passes through the cross section 101, that is, it is located in the middle position of the shell 10 in the height direction. The liquid 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 upward 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] In addition, the spray head is laterally tilted to form an angle with a vertical section 103 of the housing 10 passing through the central axis of the liquid inlet pipe 20. Figure 3 The vertical section 103 is a plane passing through the central axis of the liquid inlet pipe 20 and the center of the shell 10, which divides the shell into two hemispherical shells. The nozzle of the liquid inlet pipe 20 is horizontally deflected to form an angle β2 with the vertical section 103. Figure 2 and Figure 3 It can be seen that the spray head is deflected upward and laterally so that the fluid injected therein flows along the inner surface of the housing 10, thereby forming a rotating fluid.

[0032] The drain pipe 11 is located at the lower side of 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 liquid inlet pipe 20. Figure 3 As shown, the longitudinal section 102 is a plane perpendicular to the central axis of the liquid inlet pipe 20 and passing through the center of the shell 10, which divides 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 shown in FIG. Figure 3 As shown, the drain pipe 11 forms an angle β4 with the longitudinal section 102. Figure 2 and Figure 3 It can be seen that the nozzle sprays fluid toward the upper half of the shell 10, and discharges the fluid through the drain pipe 11 arranged on the lower half of the shell 10. The drain pipe 11 and the nozzle are located at the lower and upper parts respectively, so that the fluid rotates and flows in the shell 10 for a sufficiently long path before being discharged, ensuring that a stable rotating fluid is formed in the shell 10, that is, a flywheel-like shape.

[0033] In addition, the inner surface of the housing 10 is provided with a groove 14 extending transversely to the direction of the nozzle. The direction of the nozzle roughly determines the flow direction of the fluid, and the groove 14 is transverse to the flow direction of the fluid. Figure 4 As shown. The high-speed rotating fluid is subjected to the centrifugal force and rotates at high speed against the inner wall of the housing 10. Under the guidance of the groove 14, the high-speed rotating fluid of the outer layer generates a swirl and impacts the rotating fluid, that is, under the guidance of the groove 14, the outer layer of the fluid is guided to shunt and impact the rotating fluid, thereby reducing the kinetic energy of the rotating fluid. When the kinetic energy of the rotating fluid is large, the guided shunt kinetic energy is also relatively high, and when the kinetic energy of the rotating fluid is relatively small, the guided shunt kinetic energy is also reduced, thereby achieving a buffering effect on the pulsation of the fluid.

[0034] In addition, the buffer 100 includes an exhaust pipe 13 connected to the top of the shell 10. When the buffer 100 operates normally, the exhaust pipe 13 can be kept in a closed state. When there is more gas in the shell 10, the exhaust pipe 13 can be opened to exhaust the gas therein.

[0035] In addition, 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, and the drain pipe 12 can be opened to discharge the residue. Under normal operation, the drain pipe 12 can be kept closed.

[0036] In addition, the buffer 100 includes a heat medium coil 30 wound on the shell 10. By passing a circulating heating medium into the heat medium coil 30, the shell 10 can be heated, and then the fluid therein is heated, so that the fluid is kept at a suitable temperature. Of course, in other embodiments, the shell 10 can also be cooled by the circulating fluid in the heat medium coil 30.

[0037] On the other hand, the present 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, and the buffer is the buffer 100 for the reciprocating pump described above. The buffer 10 can be disposed on a liquid inlet pipeline connected to the upstream of the reciprocating pump 400 or a liquid discharge pipeline connected to the downstream of the reciprocating pump 400, that is, the fluid entering the reciprocating pump 400 and / or discharged from the reciprocating pump 400 is processed 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 which are transmission-connected to the reciprocating pump 400. The motor 200 is transmission-connected to the reciprocating pump 400 through the reducer 300 to drive the reciprocating pump 400 to operate.

[0039] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A buffer for a reciprocating pump, characterized in that: The buffer comprises a spherical shell (10), a liquid inlet pipe (20) and a liquid discharge pipe (11) connected to the shell (10), wherein the orientation of the liquid inlet pipe (20) and the orientation of the liquid discharge pipe (11) are staggered to allow the fluid to rotate in the shell (10).

2. The buffer for a reciprocating pump according to claim 1, characterized in that: The central axis of the liquid inlet pipe (20) is located on a cross-section (101) of the shell (10) parallel to the horizontal plane, and the outlet end of the liquid inlet pipe (20) is connected to a spray head that tilts upward to form an angle with the cross-section (101).

3. The buffer for a reciprocating pump according to claim 2, characterized in that: The spray head is laterally tilted to form an angle with a vertical section (103) of the housing (10) passing through the central axis of the liquid inlet pipe (20).

4. The buffer for a reciprocating pump according to claim 3, characterized in that: The drain pipe (11) is located at the lower side of the cross-section (101), the central axis of the drain pipe (11) is arranged at an angle to the cross-section (101), and the central axis of the drain pipe (11) is arranged at an angle to a longitudinal section (102) of the shell (10) which is perpendicular to the central axis of the liquid inlet pipe (20).

5. The buffer for a reciprocating pump according to claim 2, characterized in that: The inner surface of the housing (10) is provided with a groove (14) extending transversely to the direction of the spray head.

6. The buffer for a reciprocating pump according to any one of claims 1 to 5, characterized in that: The buffer (100) includes an exhaust pipe (13) connected to the top of the housing (10).

7. The buffer for a reciprocating pump according to any one of claims 1 to 5, characterized in that: The buffer (100) includes a sewage discharge pipe (12) connected to the bottom of the housing (10).

8. The buffer for a reciprocating pump according to any one of claims 1 to 5, characterized in that: The buffer (100) comprises a heat medium coil (30) wound on the housing (10).

9. A reciprocating pump assembly, characterized in that: The reciprocating pump assembly comprises a reciprocating pump (400), a pipeline connected to the reciprocating pump (400), and a buffer arranged on the pipeline, and the buffer is a buffer (100) for a reciprocating pump according to any one of claims 1 to 8.

10. The reciprocating pump assembly according to claim 9, characterized in that The reciprocating pump assembly comprises a motor (200) and a reducer (300) which are transmission-connected to the reciprocating pump (400).

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