CN110685923A

CN110685923A - Composite strong self-suction centrifugal pump set

Info

Publication number: CN110685923A
Application number: CN201911076452.7A
Authority: CN
Inventors: 孙英华; 韦虎林; 王志友
Original assignee: Li Ou Huaneng Group Dalian Beng Ye Co Ltd
Current assignee: Li Ou Huaneng Group Dalian Beng Ye Co Ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-01-14

Abstract

The invention discloses a combined type strong self-priming centrifugal pump set, relates to the technical field of centrifugal pumps, and particularly relates to a combined type strong self-priming centrifugal pump set with simple configuration. The invention comprises the following steps: the combined type strong self-priming centrifugal pump, the automatic exhaust and liquid supplementing device, the exhaust connecting pipe, the liquid injection pipeline and the liquid return pipe; the composite strong self-priming centrifugal pump is connected with the automatic exhaust and liquid supplementing device through an exhaust connecting pipe; the tank bottom of the automatic exhaust fluid infusion device is connected with the inlet of the composite strong self-priming centrifugal pump through a fluid return pipe; the composite strong self-priming centrifugal pump is also provided with a liquid injection pipeline. According to the technical scheme, the problems that a self-priming pump in the prior art is low in self-priming height, long in self-priming time, complex in structure, overlarge in size and the like are solved, the functions of medium storage, steam-water separation and automatic liquid supplementation in the starting and exhausting process of the self-priming pump are achieved through the simple, safe and reliable automatic exhaust and liquid supplementation device, and full-automatic starting and stopping of the self-priming pump are really achieved.

Description

Composite strong self-suction centrifugal pump set

Technical Field

The invention relates to the technical field of centrifugal pumps, in particular to a composite strong self-priming centrifugal pump set with simple configuration.

Background

The self-priming pump is used as a centrifugal pump with special purposes and is always applied to the fields of sewage oil, wastewater, sewage treatment and the like of chemical engineering processes and industrial and mining enterprises. The traditional self-priming pump has the problems of large volume, large vibration noise in operation, difficult self-priming after impeller cutting and the like. In recent years, self-priming pump technology has been developed, and related products or technologies such as a vertical self-priming pump, an externally-hung liquid storage tank, an externally-connected mechanical air suction and exhaust device, a synchronous air suction and exhaust self-priming pump, a sealless self-priming pump and the like appear in succession. However, these related products or technologies still have the defects of poor self-priming performance, low self-priming height, poor sealing performance, high failure rate, overlarge volume, low efficiency and the like.

Meanwhile, in the starting process of the traditional self-priming pump, the self-exhaust function of the self-priming pump is difficult to realize, an exhaust valve is frequently opened and closed manually, and meanwhile, in the self-priming process, the volume of a medium in the pump is continuously reduced due to the discharge of the medium in the initial stage and the continuous discharge of a vapor-liquid mixed medium in the exhaust process, so that the self-priming function cannot be realized or can be realized only through continuous liquid supplement.

Aiming at the problems in the prior art, a novel combined strong self-priming centrifugal pump set is researched and designed, so that the problem in the prior art is very necessary to be overcome.

Disclosure of Invention

According to the technical problems of low self-priming height, long self-priming time, complex structure, overlarge volume and the like of the self-priming pump in the prior art, the composite strong self-priming centrifugal pump set is provided; through having supported the automatic exhaust fluid infusion device for the self priming pump, at the self priming pump start-up initial stage, in the start-up process, the whole in-process is accomplished to the self priming function, need not artificial intervention completely, realizes the automatic exhaust function of self priming pump.

The composite strong self-priming centrifugal pump has the auxiliary impeller cover with air suction window and the pump cover with air exhaust window, and during the rotation of the auxiliary impeller, the auxiliary impeller cover, the pump cover and the pump cover form a component with the working principle of the liquid ring vacuum pump, so that the air in the pump is exhausted, the vacuum degree in the pump is increased, and the water in the inlet pipeline is introduced into the pump cavity to start working. Before the pump is started, the pump is filled with media, in the initial starting stage, the media in the pump are discharged into a tank body of an automatic exhaust liquid supplementing device connected with the pump through an exhaust connecting pipe, the tank body has enough volume to contain the media, in the starting process, vapor-liquid mixtures are discharged from an exhaust pipeline of the pump, when the vapor-liquid mixtures enter the tank body of the automatic exhaust liquid supplementing device, vapor-liquid separation is realized, gas is discharged from an emptying pipeline, liquid falls into the tank body, the media in the pump are supplemented with liquid through a liquid return pipeline, and after the self-priming action of the pump is completed, the water level in the tank body of the automatic exhaust liquid supplementing device is continuously increased until a floater is closed to close the exhaust pipeline.

The technical means adopted by the invention are as follows:

the composite strong self-priming centrifugal pump set is characterized by comprising the following components: the combined type strong self-priming centrifugal pump, the automatic exhaust and liquid supplementing device, the exhaust connecting pipe, the liquid injection pipeline and the liquid return pipe;

further, the composite strong self-priming centrifugal pump comprises: the device comprises a suction elbow, a pump body, an impeller, an auxiliary impeller cover, an auxiliary impeller, a pump cover, a sealing part, a pump shaft and a bearing box body part; the suction elbow is connected with the inlet of the pump body; the pump shaft is arranged in the bearing box body part; the impeller and the auxiliary impeller are arranged at the front part of the pump shaft and are separated by the auxiliary impeller cover; the auxiliary impeller cover is connected with the pump cover through a bolt; the bearing box body part is connected with the pump cover into a whole through a bolt, and the pump cover is connected with the pump body through a bolt; the combined strong self-priming centrifugal pump is matched with a small automatic exhaust and fluid infusion device;

further, the automatic exhaust fluid infusion device includes: emptying the pipeline, the tank body and closing the floater; the emptying pipeline is arranged at the top end of the tank body and communicated with the inside of the tank body; the closing floater is arranged in the tank body and is in a free state;

further, the composite strong self-priming centrifugal pump is connected with the automatic exhaust liquid supplementing device through an exhaust connecting pipe;

furthermore, the composite strong self-priming centrifugal pump is also provided with a liquid injection pipeline, and liquid injection of the self-priming pump is completed before the pump is started.

Furthermore, the auxiliary impeller cover is provided with an air suction window, the pump cover is provided with an exhaust window, a component with the working principle of the liquid ring vacuum pump is formed together, a small number of parts are added to the common centrifugal pump to form the combined type strong self-priming centrifugal pump, and the air suction and exhaust functions of the combined type strong self-priming centrifugal pump are achieved.

Further, in the initial starting stage of the composite strong self-priming centrifugal pump, the media filled in the pump are discharged into the tank body of the automatic exhaust and liquid supplementing device connected with the pump through the exhaust connecting pipe, and the tank body has enough volume to contain the media; during the starting process of the composite strong self-priming centrifugal pump, a pump exhaust pipeline discharges a vapor-liquid mixture, when the mixture enters a tank body of an automatic exhaust and liquid supplementing device, vapor-liquid separation is realized, gas is discharged from an emptying pipeline, and liquid falls into the tank body;

furthermore, the tank bottom of the automatic exhaust and liquid supplementing device is connected with the inlet of the composite strong self-priming centrifugal pump through a liquid return pipe, and in the starting process of the composite strong self-priming centrifugal pump, the medium in the tank body is supplemented with liquid for the medium in the pump through the liquid return pipe, so that the self-priming action continuity of the composite strong self-priming centrifugal pump is maintained;

further, after the self-priming action of the pump is completed, the water level in the tank body of the automatic exhaust and liquid supplementing device is continuously increased, the floater is closed to continuously rise until the floater is closed to close the exhaust pipeline, and the pump normally operates.

In the actual use process, before the centrifugal pump is used for the first time, a conveying medium is injected into the composite strong self-priming centrifugal pump through the liquid injection pipeline, and the injection amount is close to the maximum height of the suction elbow. After the pump is started, under the combined action of the auxiliary impeller, the auxiliary impeller cover with the air suction window and the pump cover with the air exhaust window, the redundant liquid in the pump is exhausted into a tank body of the automatic exhaust device through the pump cover exhaust cavity and the exhaust connecting pipe. Along with the continuous reduction of the medium in the pump, the pressure in the pump is continuously reduced, and a vapor-liquid mixing phenomenon occurs. The auxiliary impeller and the auxiliary impeller cover continuously utilize the principle of a water ring vacuum pump to absorb vapor-liquid mixed media in the pump cavity through the air suction window of the auxiliary impeller cover, the vapor-liquid mixed media are discharged through the air discharge window and the air discharge cavity on the pump cover, the vapor-liquid mixed media are discharged into the tank body of the automatic air discharge and liquid supplement device through the air discharge connecting pipe, vapor-liquid separation of the vapor-liquid mixed media is realized in the tank body, gas is continuously discharged from the air discharge pipeline at the top end of the tank body, and the media fall into the bottom of the tank body. In order to keep the condition that the auxiliary impeller has the water ring vacuum pump, the medium falling into the bottom of the tank body flows back to the inlet of the composite strong self-priming centrifugal pump through the liquid return pipe, and the liquid supplementing function of the composite strong self-priming centrifugal pump is realized. The pressure in the pump cavity is further reduced along with the continuous discharge of the gas in the pump cavity, when the pressure is reduced to a certain degree, the medium in the device before the pump is sucked into the pump, the self-priming process of the pump is finished, and the normal operation of the pump is started. After normal operation, the medium passes through the exhaust connecting pipe and gets into automatic exhaust apparatus's jar internal, because contain the orifice plate in the liquid return pipe, consequently the volume of the medium that gets into in the jar is greater than the volume of the medium that flows out in the jar, and the medium liquid level in the jar rises constantly, closes the float and rises along with the continuous rising of liquid level, until closing the evacuation pipeline. At this time, the combined strong self-priming centrifugal pump set starts to operate normally.

Compared with the prior art, the invention has the following advantages:

1. the invention provides a combined type strong self-priming pump, which consists of an auxiliary impeller cover, a pump cover and an auxiliary impeller, wherein the auxiliary impeller cover is formed by splitting a pump cover of a traditional horizontal cantilever pump, the pump cover is provided with an air suction window, the pump cover and the auxiliary impeller form an assembly with the working principle of a liquid ring vacuum pump together, the strong self-priming function of the common centrifugal pump is realized by utilizing the principle of the liquid ring vacuum pump, and the combined type strong self-priming pump has the biggest characteristics of simple structure, short self-priming time and far higher self-priming height than that of the existing self-priming pump, and all the traditional horizontal cantilever pumps can be changed into the self-priming pump through simple transformation, so the application range is.

2. In the process of starting a traditional self-priming pump, the self-exhaust function of the self-priming pump is difficult to realize, an exhaust valve is frequently opened and closed manually, and meanwhile, in the self-priming process, the volume of a medium in the pump is continuously reduced due to the discharge of the medium in the initial stage and the continuous discharge of a vapor-liquid mixed medium in the exhaust process, so that the self-priming function cannot be realized or can be realized only through continuous liquid supplement. Compared with the prior art, the invention is matched with an automatic exhaust and fluid infusion device for the self-priming pump, the device is connected with the self-priming pump through an exhaust pipeline and a fluid return pipeline, before the pump is started, the pump is filled with a medium, at the initial starting stage, the medium in the pump is discharged into a tank body of the automatic exhaust liquid supplementing device connected with the pump through the exhaust connecting pipe, the tank has a sufficient volume to contain these media, and during start-up, the pump is vented from the vent line to a vapor-liquid mixture, when entering the tank body of the automatic exhaust and liquid supplementing device, the gas-liquid separation is realized, the gas is discharged from the emptying pipeline, the liquid falls into the tank body, in order to keep the condition that the auxiliary impeller is provided with the water ring vacuum pump, the medium in the tank body replenishes the medium in the pump through the liquid return pipeline, after the self-priming action of the pump is finished, the water level in the tank body of the automatic air-exhausting liquid-supplementing device is continuously increased until the floater is closed to close the air exhaust pipeline. This automatic exhaust fluid infusion device makes the starting process of self priming pump not need any operation, the self-starting function of the self priming pump of really realizing.

In conclusion, the technical scheme of the invention overcomes the defects of low self-priming height, long self-priming time, complex structure, overlarge volume and the like of the self-priming pump in the prior art; simultaneously, realized through simple, safe and reliable's automatic exhaust fluid infusion device that the self priming pump is accomodate, vapor-water separation, automatic fluid infusion function starting the medium of exhaust in-process, really realized that the full-automatic of self priming pump opens and stops.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a composite strong self-priming centrifugal pump according to the present invention;

FIG. 2 is a schematic view of an automatic fluid infusion and exhaust apparatus according to the present invention;

FIG. 3 is a schematic view of the present invention in use;

fig. 4 is a side view of the present invention in use.

In the figure: 1. the device comprises a suction elbow 2, a pump body 3, an impeller 4, an auxiliary impeller cover 5, an auxiliary impeller 6, a pump cover 7, a sealing part 8, a pump shaft 9, a bearing box part 10, an emptying pipeline 11, a tank body 12, a closing floater 13, an exhaust connecting pipe 14, a liquid injection pipeline 15 and a liquid return pipe.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in the figure, the invention provides a composite strong self-priming centrifugal pump set, which is characterized in that the composite strong self-priming centrifugal pump set comprises: the combined type strong self-priming centrifugal pump, the automatic exhaust and liquid supplementing device, the exhaust connecting pipe 13, the liquid injection pipeline 14 and the liquid return pipe 15; the composite strong self-priming centrifugal pump is connected with the automatic exhaust and liquid supplementing device through an exhaust connecting pipe 13; the tank bottom of the automatic exhaust fluid infusion device is connected with the inlet of the composite strong self-priming centrifugal pump through a fluid return pipe 15; the composite strong self-priming centrifugal pump is also provided with a liquid injection pipeline 14;

the composite strong self-priming centrifugal pump comprises: the pump comprises a suction elbow 1, a pump body 2, an impeller 3, an auxiliary impeller cover 4, an auxiliary impeller 5, a pump cover 6, a sealing part 7, a pump shaft 8 and a bearing box body part 9; the suction elbow 1 is connected with the inlet of the pump body 2; the pump shaft 8 is arranged in the bearing box body part 9; the impeller 3 and the auxiliary impeller 5 are arranged at the front part of the pump shaft 8 and separated by an auxiliary impeller cover 4; the auxiliary impeller cover 4 is connected with the pump cover 6 through a bolt; the bearing box body part 9 is connected with the pump cover 6 into a whole through a bolt, and the pump cover 6 is connected with the pump body 2 through a bolt;

the automatic exhaust fluid infusion device includes: evacuation line 10, tank 11 and closing float 12; the emptying pipeline 10 is arranged at the top end of the tank body 11 and is communicated with the inside of the tank body 11; the closing float 12 is disposed inside the tank 11 in a free state.

The auxiliary impeller cover 4 is provided with an air suction window, the pump cover 6 is provided with an air exhaust window, an assembly with the working principle of a liquid ring vacuum pump is formed together, and a small number of parts are added on a common centrifugal pump to form the composite strong self-priming centrifugal pump.

The automatic exhaust liquid supplementing device is provided with a tank body 11 with enough volume and a closing floater 12, the storage of media in the pump is completed at the initial stage of starting the pump, the functions of steam-water separation and automatic liquid supplementing are completed in the self-priming process, and after the self-priming function is completed, the emptying pipeline 10 is automatically closed, so that the idle consumption is reduced, and the pump set is in a high-efficiency state to work.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The composite strong self-priming centrifugal pump set is characterized by comprising the following components: the combined strong self-priming centrifugal pump, the automatic exhaust and liquid supplementing device, the exhaust connecting pipe (13), the liquid injection pipeline (14) and the liquid return pipe (15); the composite strong self-priming centrifugal pump is connected with the automatic exhaust liquid supplementing device through an exhaust connecting pipe (13); the tank bottom of the automatic exhaust and fluid infusion device is connected with the inlet of the composite strong self-priming centrifugal pump through a fluid return pipe (15); the composite strong self-priming centrifugal pump is also provided with a liquid injection pipeline (14);

the composite strong self-priming centrifugal pump comprises: the pump comprises a suction bent pipe (1), a pump body (2), an impeller (3), an auxiliary impeller cover (4), an auxiliary impeller (5), a pump cover (6), a sealing part (7), a pump shaft (8) and a bearing box body part (9); the suction elbow (1) is connected with the inlet of the pump body (2); the pump shaft (8) is arranged in the bearing box body part (9); the impeller (3) and the auxiliary impeller (5) are arranged at the front part of the pump shaft (8) and are separated by an auxiliary impeller cover (4); the auxiliary impeller cover (4) is connected with the pump cover (6) through a bolt; the bearing box body part (9) is connected with the pump cover (6) into a whole through a bolt, and the pump cover (6) is connected with the pump body (2) through a bolt;

the automatic exhaust fluid infusion device comprises: an emptying pipeline (10), a tank body (11) and a closing floater (12); the emptying pipeline (10) is arranged at the top end of the tank body (11) and is communicated with the inside of the tank body (11); the closing float (12) is arranged in the tank body (11) and is in a free state.

2. The composite strong self-priming centrifugal pump set according to claim 1, wherein the secondary impeller cover (4) has a suction window, and the pump cover (6) has an exhaust window, which together form an assembly having the working principle of a liquid ring vacuum pump, and the composite strong self-priming centrifugal pump is derived by adding a small number of parts to a common centrifugal pump.

3. The combined type strong self-priming centrifugal pump set according to claim 1, wherein the automatic air-discharging and fluid-supplementing device has a tank (11) with sufficient volume and a closing float (12), and completes the storage of the medium in the pump at the initial stage of starting the pump, and completes the functions of steam-water separation and automatic fluid supplementation in the self-priming process, and after completing the self-priming function, automatically closes the emptying pipeline (10), thereby reducing the idle consumption and making the pump set work in a high-efficiency state.