CN215170833U - Centrifugal pump structure for gas-liquid mixing and conveying - Google Patents

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump structure for gas-liquid mixing and conveying, which comprises a centrifugal pump, wherein the centrifugal pump comprises a pump shell, an impeller and a motor, the motor is connected with the impeller, the impeller is arranged in a pump cavity of the pump shell, the pump shell is provided with a pump inlet and a pump outlet, a separation component is arranged above the pump and is internally provided with a separation cavity, the separation component is provided with a separation cavity backflow port, a separation cavity inlet and a separation cavity outlet, the separation cavity backflow port is positioned at one side of the separation cavity inlet, and the separation cavity outlet is positioned right above the separation cavity inlet; the pump shell is provided with a pump return opening which is upwards connected with a return opening of the separation cavity through a return pipe; the outlet of the pump is upwards connected with the inlet of the separation cavity through the discharge pipe; the outlet of the separation cavity is connected with an external conveying pipeline. The utility model provides high conveying quality can carry out gas-liquid separation at the transport link, has ensured production time's stability controllable, and traditional mode has relatively reduced equipment input, has improved production efficiency.

Description

Centrifugal pump structure for gas-liquid mixing and conveying

Technical Field

The utility model relates to a centrifugal pump technical field, concretely relates to centrifugal pump structure for gas-liquid mixture is carried.

Background

Centrifugal pumps are pump body structures that utilize the high speed rotation of an impeller to create centrifugal action within a pump chamber to deliver a liquid. In order to improve the working efficiency of the pump, before the pump works, liquid is generally filled into a pipeline connected with the pump cavity and the pump, and then the impeller motor is started, so that the liquid is thrown at a high speed in the pump cavity in the process that the motor shaft drives the impeller to rotate at a high speed, is thrown to the edge of the impeller under the centrifugal action, and is conveyed outwards through an outer discharge pipeline communicated with the pump cavity.

When the traditional centrifugal pump works, the separation treatment can not be carried out on the gas mixed in the liquid, so that the gas can be mixed in the liquid and conveyed together. The gas in the gas-liquid mixture can reduce the suction force of the pump while occupying the space of the pump cavity, and the pumping effect is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centrifugal pump structure for gas-liquid mixture is carried, technical problem more than solving.

The utility model provides a technical problem can adopt following technical scheme to realize:

a centrifugal pump structure for gas-liquid mixing conveying comprises a centrifugal pump, wherein the centrifugal pump comprises a pump shell, an impeller and a motor, the motor is connected with the impeller, the impeller is arranged in a pump cavity of the pump shell, the pump shell is provided with a pump inlet and a pump outlet, materials conveyed by the centrifugal pump enter the pump cavity through the pump inlet and are output outwards through the pump outlet, a separation component with a hollow inner part is arranged above the centrifugal pump, a separation cavity is arranged in the separation component, the separation component is provided with a separation cavity backflow port and a separation cavity inlet which are opened downwards, an upward opening separation cavity outlet is further arranged, the separation cavity backflow port is positioned on one side of the separation cavity inlet, and the separation cavity outlet is positioned right above the separation cavity inlet;

the pump shell is provided with a pump backflow port which is communicated with the separation cavity after being upwards connected with the backflow port of the separation cavity through a backflow pipe;

the outlet of the pump is connected with the inlet of the separation cavity through a discharge pipe and then communicated with the separation cavity;

and the outlet of the separation cavity is connected with an external conveying pipeline.

The utility model discloses during operation, the material that contains gas is imported to the pump chamber from the pump entry, the promotion effect that produces after the impeller high-speed rotation is carried to the separation intracavity from the back flow upwards, in the separation chamber, because dead weight separates gas and liquid layering, gas is carried upwards from the separation chamber export, and liquid is then under dead weight effect down stream current, flow back to the pump chamber from the back flow, continue above-mentioned separation process, then be occupied by liquid gradually in the separation chamber, be full of liquid in the separation chamber, at this moment, centrifugal pump and separator assembly constitute a whole set of new centrifugal pump structure and play the pumping action of centrifugal pump, in this pumping process, because there is not the influence of the gas in the gas-liquid mixture, therefore pumping efficiency obtains effectively promoting; and the condition that has gas-liquid mixture again in the material of follow-up transport, then the subassembly continues to exert gas-liquid separation's effect, and the circulation makes repeatedly the utility model discloses can discharge the gas in the pump chamber in continuous operation, improve the work efficiency of pump.

Preferably, the return pipe is vertically arranged and then is connected with the separating assembly and the pump shell;

the discharge pipe is vertically arranged and then connected with the separation assembly and the pump shell.

Optionally, the separation assembly is provided with a filling opening which opens upwards and is communicated with the separation chamber, and the filling opening is used for filling liquid into the separation chamber and the pump chamber before the centrifugal pump works, so that the initial working efficiency of the pump is improved.

Optionally, the filling opening is provided with a blind plate for closing the filling opening after the filling operation is completed.

Optionally, the pump inlet is connected to a one-way valve assembly, an opening at one end of the one-way valve assembly is communicated with the pump cavity, and an opening at the other end of the one-way valve assembly is connected to the input pipeline of the feeding material.

Optionally, the check valve assembly includes a valve body housing, a spring bottom plate and a push plate, the valve body housing is of a hollow structure, a valve cavity is formed in the valve body housing, two ends of the valve cavity are opened, one side opening of the valve body housing is used as a valve cavity inlet, the other side opening of the valve body housing is used as a valve cavity outlet, the valve cavity outlet is connected with the pump inlet, and the spring, the spring bottom plate and the push plate are all arranged in the valve cavity;

one end of the spring is fixedly connected with the spring bottom plate, the other end of the spring is fixedly connected with the push plate, the push plate moves in a left-right reciprocating mode in the valve cavity, and the diameter of the push plate is larger than that of the valve cavity inlet;

the spring bottom plate is positioned between the push plate and the valve cavity outlet, and the spring bottom plate is fixedly connected with the inner wall of the valve cavity, so that in the working process of the centrifugal pump, when liquid in the pump cavity flows to the valve cavity inlet of the one-way valve assembly due to shutdown or insufficient pumping force and the like, the liquid inevitably pushes the push plate and then pushes the push plate to the valve cavity inlet to seal the valve cavity inlet, so that liquid backflow is avoided, when liquid flows into the valve cavity from the valve cavity inlet during feeding, the push plate is pushed reversely by pressure and pushed to one side of the valve cavity outlet, and meanwhile, the spring is squeezed to compress the push plate, so that the liquid is released to enter a passage space of the valve cavity, and after external feeding power is removed, the push plate can be pushed to the valve cavity inlet by the restoring force of the spring to seal the inlet.

Optionally, the separation assembly is of a straight cylindrical structure, is of a horizontally transverse cylindrical structure, is hollow inside, and has two openings sealed by a blind plate structure or a plug structure, so as to be externally connected with a pipeline when necessary or be used as a maintenance inlet during cleaning and maintenance;

the top of the outer wall of the separation component is provided with the filling port, the outlet of the separation cavity and the bottom of the outer wall of the separation component is provided with the return port of the separation cavity and the inlet of the separation cavity.

Optionally, the return pipe and the discharge pipe are both arranged in a two-section structure.

Optionally, the return pipe includes an upper return pipe and a lower return pipe, which are connected by a clamp, the upper return pipe is connected to the separation assembly and communicates with the separation chamber, and the lower return pipe is connected to the pump housing and communicates with the pump chamber;

the discharging pipe comprises a discharging upper pipe and a discharging lower pipe which are connected through a clamping hoop, the discharging upper pipe is connected with the separating component upwards and communicated with the separating cavity, and the discharging lower pipe is connected with the pump shell downwards and communicated with the pump cavity.

Has the advantages that: due to the adoption of the technical scheme, the utility model provides a conveying quality has been promoted, can carry out gas-liquid separation at the transport link, has ensured production time's stability controllable, and traditional mode has relatively reduced equipment input, has improved production efficiency.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

fig. 4 is a schematic structural view of the separation assembly of the present invention;

fig. 5 is a schematic perspective view of the check valve assembly of the present invention;

fig. 6 is a schematic cross-sectional view of fig. 5.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings. It is noted that the terms "first," "second," "third," "fourth," and the like (if any) in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises" or "comprising," and any variations thereof, are intended to cover non-exclusive inclusions, such that a product or apparatus that comprises a list of elements or units is not necessarily limited to those elements or units expressly listed, but may include other elements or units not expressly listed or inherent to such product or apparatus.

Referring to fig. 1, a centrifugal pump structure for gas-liquid mixing and conveying comprises a centrifugal pump, the centrifugal pump comprises a pump case 101, an impeller 102 and a motor 103, the motor 103 is arranged in a motor chamber 104, the motor 103 is connected with the impeller 102, the impeller 102 is arranged in a pump cavity of the pump case 101, the pump case 101 is provided with a pump inlet and a pump outlet, materials conveyed by the centrifugal pump enter the pump cavity through the pump inlet and are output outwards through the pump outlet, a separation assembly 200 with a hollow inner part is arranged above the centrifugal pump, a separation cavity is arranged in the separation assembly 200, the separation assembly 200 is provided with a separation cavity return port and a separation cavity inlet which are opened downwards, an upward opening separation cavity outlet 201 is also arranged, the separation cavity return port is positioned on one side of the separation cavity inlet, and the separation cavity outlet 201 is positioned right above the separation cavity inlet;

the pump shell 101 is provided with a pump return opening which is connected with the return opening of the separation cavity through a return pipe 301 and then communicated with the separation cavity;

the outlet of the pump is connected with the inlet of the separation cavity through a discharge pipe 302 and then communicated with the separation cavity;

the separation chamber outlet 201 is connected to an external delivery conduit.

The utility model discloses a make the material flow back to the pump chamber more smoothly from the separation chamber, can do as follows setting: in some embodiments, the return pipe 301 is vertically arranged and then connects the separating assembly 200 and the pump housing 101;

the discharge pipe 302 is vertically arranged and then connects the separation assembly 200 and the pump housing 101.

It should be noted that the pump outlet is arranged on the pump housing 101 outside the edge of the impeller 102, so that the tapping pipe 302 is arranged along a tangent of the equivalent circle of the impeller 102. The arrangement structure means that when the rotation center of the impeller 102 is used as a circle center, the running path of the edge of the impeller 102 is circular, the arrangement straight line of the discharge pipe 302 is parallel to the tangent line of the circular shape, or the straight line and the tangent line are coincident, so that the material in the pump cavity is thrown out from the outlet of the pump at the maximum outlet speed in the throwing process, and the efficiency of conveying the material into the discharge pipe 302 to the outside of the pump is improved.

In some embodiments, the separation assembly 200 is provided with an upwardly opening fill port 202 which communicates with the separation chamber for filling the separation chamber and pump chamber with liquid prior to operation of the centrifugal pump, thereby improving the initial operating efficiency of the pump.

In some embodiments, the filling opening 202 may be provided with a blind plate, through which the filling opening is flexibly covered and shielded, or opened quickly, so as to facilitate quick opening when filling work is required, and quickly and conveniently close the opening after completion of the work.

Specifically, before the centrifugal pump work, be convenient for make pump chamber and separation intracavity fill with a certain amount of liquid after filling material or other liquid with the blind plate after opening to make the initial work of centrifugal pump have higher suction, the blind plate accessible clamp fastening is on filling mouth 202, is convenient for open and confined flexible operation.

In some embodiments, the pump inlet is connected to a one-way valve assembly 400, with one end of the one-way valve assembly 400 opening into the pump chamber and the other end opening into the feed inlet conduit.

In some embodiments, the check valve assembly 400 includes a valve body housing 401, a spring 402, a spring bottom plate 403 and a push plate 404, the valve body housing 401 is a hollow structure, and has a valve cavity therein, two ends of the valve cavity are open, one side of the valve cavity is open as a valve cavity inlet, the other side of the valve cavity is open as a valve cavity outlet, the valve cavity outlet is connected with a pump inlet, and the spring 402, the spring bottom plate 403 and the push plate 404 are all disposed in the valve cavity;

one end of the spring 402 is fixedly connected with the spring bottom plate 403, the other end of the spring is fixedly connected with the push plate 404, the push plate 404 reciprocates left and right in the valve cavity, and the diameter of the push plate 404 is larger than that of the valve cavity inlet (the valve cavity inlet is set as a circular port);

the spring bottom plate 403 is positioned between the push plate 404 and the valve cavity outlet, and the spring bottom plate 403 is fixedly connected with the inner wall of the valve cavity, so that in the working process of the centrifugal pump, when liquid in the pump cavity flows to the valve cavity inlet of the check valve assembly due to shutdown or insufficient pumping force and the like, the liquid inevitably pushes the push plate 404 and then pushes the push plate 404 to the valve cavity inlet to seal the valve cavity inlet, thereby avoiding liquid backflow, and in the feeding process, when the liquid flows into the valve cavity from the valve cavity inlet, the pressure pushes the push plate 404 reversely and pushes the liquid to one side of the valve cavity outlet, and simultaneously the spring 402 is pressed to compress the liquid, thereby releasing the liquid to enter the passage space of the valve cavity, and after external feeding power is removed, the push plate 404 can be pushed to the valve cavity inlet by the restoring force of the spring 402 to seal the inlet. In the structure shown in fig. 6, the valve chamber inlet is open on the left side of the structure shown in the figure, and the valve chamber outlet is open on the right side.

Specifically, the push plate 404 is a disk-shaped circular plate structure, the check valve assembly can be a cylindrical structure, the valve body housing is a cylinder as a whole, the inner cavity of the valve body housing is a corresponding cylindrical inner cavity, and the diameter of the cross section of the inner cavity is larger than that of the push plate 404, so that the push plate 404 can move left and right in a reciprocating manner in the valve cavity without hindrance. The inlet of the valve cavity is provided as a round opening, and the diameter of the round opening is smaller than that of the push plate 404, so that the round opening can be covered on the push plate 404 to seal the push plate when the push plate 404 is pushed to the round opening.

The utility model discloses a make the shutoff effect of push pedal 404 better, can set up according to following structure: in some embodiments, a sealing ring 405 is sleeved on the edge of the pushing plate 404, and the joint of the valve cavity inlet and the valve cavity is set as an inclined inner wall, so that the inner wall of the valve cavity on the side of the valve cavity inlet is in a tapered closing-in structure, and after the pushing plate 404 is pushed towards and covers the valve cavity inlet, the sealing ring 405 is attached to the inner wall of the tapered closing-in structure, thereby achieving a better sealing effect.

The utility model discloses a make push pedal 404's propulsion route along the straight line to make its accuracy cover on the valve pocket entry, can set up according to following structure: a connecting rod 407 can be arranged between the spring 402 and the spring base plate 403, one end of the connecting rod 407 is connected with the push plate 404, the other end passes through a through hole on the spring base plate 403, and the spring 402 is sleeved on the connecting rod 407. In the structure shown in fig. 6, when feeding, the push plate 404 is pushed toward the valve chamber outlet, the spring 402 is compressed, and the right end of the connecting rod 407 passes through the spring bottom plate 403 and then moves toward the valve chamber outlet.

The utility model discloses a fixed link 407, the fixed connecting rod base 408 that sets up (its left side face that is located the spring bottom plate in the structure shown in fig. 6) on spring bottom plate 403, connecting rod 407 passes spring bottom plate 403 after passing connecting rod base 408 again, and spring 402 is located between connecting rod base 408 and the push pedal 404. The utility model discloses in, for making the feeding smooth and easy, the coverage area of spring bottom plate 403 should set up as little as possible, avoids forming great hindrance to the feeding, can adopt following structure setting mode for this: for example, the base of the spring 402 is a straight bar structure, and two ends of the base are fixedly connected with the inner wall of the valve cavity; or, the spring bottom plate 403 is provided with a hollow structure, and the rest parts except the position where the connecting rod base 408 is installed are provided with larger through holes so as to increase the feeding amount.

In some preferred embodiments, as shown in fig. 5 and 6, the valve body housing 401 of the one-way valve assembly is provided as two left and right parts, including a left valve housing 4011 and a right valve housing 4012, which are fastened by a clamp 409, a spring base plate 403 is located between the left valve housing 4011 and the right valve housing 4012, and a sealing gasket is provided at the edge of the spring base plate 403 to ensure the connection sealing performance of the two-part structure of the valve body housing.

In some embodiments, as shown in fig. 1, the separation assembly 200 is a straight cylindrical structure, which is a horizontally horizontal cylinder structure, and is hollow inside, and the two ends of the separation assembly are open and closed by a blind plate structure or a plug structure, so as to connect the external pipeline when necessary, or serve as a maintenance inlet when cleaning and maintaining, as shown in fig. 4, the left side opening of the separation assembly 200 is blocked by a blind plate 209.

The top of the outer wall of the separation assembly 200 is provided with a filling port 202 and a separation cavity outlet 201, and the bottom of the outer wall is provided with a separation cavity return port and a separation cavity inlet.

In some preferred embodiments, as shown in fig. 1, 2, 3 and 4, the return pipe 301 and the discharge pipe 302 are provided in a two-stage structure.

Specifically, as shown in fig. 3, the return pipe 301 includes a return upper pipe 3011 and a return lower pipe 3012, which are connected by a clip, the return upper pipe 3011 is connected to the separation assembly 200 upward and communicates with the separation chamber, and the return lower pipe 3012 is connected to the pump housing 101 downward and communicates with the pump chamber;

the outlet pipe 302 comprises an upper outlet pipe 3021 and a lower outlet pipe 3022, which are connected by a clamping connection, the upper outlet pipe 3021 being connected to the separating assembly 200 in an upward direction and communicating with the separating chamber, and the lower outlet pipe 3022 being connected to the pump housing 101 in a downward direction and communicating with the pump chamber.

It should be noted that, the utility model discloses a realize the sealed effect of the back flow 301 and the discharging pipe 302 of two segmentation structures, set up the sealing washer in the seam crossing of the two segmentation structures of each pipe, the rethread clamp is connected fixedly. The utility model discloses set up discharging pipe and back flow into two segmentation structures, it is used for meaning to reduce the assembly degree of difficulty, makes a part of discharging pipe and back flow assemble with the disengaging assembly in advance in the disengaging assembly manufacturing process, makes another part of discharging pipe and back flow assemble in advance on the pump case to make connection between them only through two sections of back flow and the connection between two sections of discharging pipe can realize. The disassembly and assembly processes of the separation assembly and the pump body do not carry out repeated disassembly and assembly operations on the separation cavity backflow port and the separation cavity inlet of the separation assembly, and do not carry out repeated disassembly and assembly operations on the pump inlet and the pump outlet of the pump body, so that the damage to the structural components is avoided. For the damage of the connecting part of the two-section structure of the discharge pipe and the return pipe, the damage of the return port of the separation cavity, the inlet of the pump and the outlet of the pump is not easy to repair, and the pump shell and the shell of the separation assembly are easy to repair. In addition, the connection position of the two-section structure of the return pipe or the discharge pipe by adding the structure such as the extension pipe can be conveniently increased, so that the return path or the discharge path is increased.

To sum up, the utility model discloses during operation, the liquid material that contains gas is imported to the pump chamber from the pump entry, the promotion effect that produces after the high-speed rotation of impeller is carried to the separation intracavity from the back flow upwards, in the separation chamber, because dead weight separates gas and liquid layering, gas is carried upwards from the separation chamber export, and liquid is then under dead weight effect down-stream and down, flow back to the pump chamber from the back flow, last above-mentioned separation process, then be occupied by liquid gradually in the separation chamber, until being full of liquid in the separation chamber, at this moment, centrifugal pump and separator assembly constitute a whole set of new centrifugal pump structure and play the pumping action of centrifugal pump, in this pumping process, because there is not the influence of the gas in the gas-liquid mixture, therefore pumping efficiency obtains effectively promoting; and the condition that has gas-liquid mixture again in the material of follow-up transport, then the subassembly continues to exert gas-liquid separation's effect, and the circulation makes repeatedly the utility model discloses can discharge the gas in the pump chamber in continuous operation, improve the work efficiency of pump.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A centrifugal pump structure for gas-liquid mixing and conveying comprises a centrifugal pump, wherein the centrifugal pump comprises a pump shell, an impeller and a motor, the motor is connected with the impeller, the impeller is arranged in a pump cavity of the pump shell, and the pump shell is provided with a pump inlet and a pump outlet;

the pump shell is provided with a pump backflow port which is communicated with the separation cavity after being upwards connected with the backflow port of the separation cavity through a backflow pipe;

the outlet of the pump is connected with the inlet of the separation cavity through a discharge pipe and then communicated with the separation cavity;

and the outlet of the separation cavity is connected with an external conveying pipeline.

2. A centrifugal pump structure for gas-liquid mixture delivery according to claim 1, wherein the return pipe is vertically arranged to connect the separation assembly and the pump casing;

the discharge pipe is vertically arranged and then connected with the separation assembly and the pump shell.

3. A centrifugal pump structure for gas-liquid mixture delivery according to claim 1, wherein said separation assembly is provided with an upwardly open pour opening communicating with said separation chamber.

4. A centrifugal pump structure for gas-liquid mixture delivery according to claim 3, wherein the pouring port is provided with a blind plate.

5. A centrifugal pump structure for gas-liquid mixture delivery according to any one of claims 1 to 4, wherein the pump inlet is connected with a one-way valve assembly, one end of the one-way valve assembly is opened and communicated with the pump cavity, and the other end of the one-way valve assembly is opened and connected with an input pipeline of feeding materials.

6. The centrifugal pump structure for gas-liquid mixture conveying of claim 5, wherein the check valve assembly comprises a valve body shell, a spring bottom plate and a push plate, the valve body shell is of a hollow structure and is provided with a valve cavity therein, two ends of the valve body shell are opened, one side opening of the valve body shell is used as a valve cavity inlet, the other side opening of the valve body shell is used as a valve cavity outlet, the valve cavity outlet is connected with the pump inlet, and the spring, the spring bottom plate and the push plate are all arranged in the valve cavity;

one end of the spring is fixedly connected with the spring bottom plate, the other end of the spring is fixedly connected with the push plate, the push plate moves in a left-right reciprocating mode in the valve cavity, and the diameter of the push plate is larger than that of the valve cavity inlet;

the spring bottom plate is positioned between the push plate and the valve cavity outlet and is fixedly connected with the inner wall of the valve cavity.

7. A centrifugal pump structure for gas-liquid mixture conveying according to claim 3 or 4, wherein the separation assembly is of a straight cylindrical structure, is of a horizontally transverse cylindrical structure, is hollow inside and is closed at two ends;

the top of the outer wall of the separation component is provided with the filling port, the outlet of the separation cavity and the bottom of the outer wall of the separation component is provided with the return port of the separation cavity and the inlet of the separation cavity.

8. A centrifugal pump structure for gas-liquid mixture delivery according to any one of claims 1 to 4, wherein the return pipe and the discharge pipe are provided in a two-stage structure.

9. A centrifugal pump structure for gas-liquid mixture delivery according to claim 8, wherein said return pipe includes a return upper pipe and a return lower pipe connected by a clamp, said return upper pipe being connected to said separation unit and communicating with said separation chamber, said return lower pipe being connected to said pump casing and communicating with said pump chamber;

the discharging pipe comprises a discharging upper pipe and a discharging lower pipe which are connected through a clamping hoop, the discharging upper pipe is connected with the separating component upwards and communicated with the separating cavity, and the discharging lower pipe is connected with the pump shell downwards and communicated with the pump cavity.

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