CN219282081U

CN219282081U - Double-layer volute structure and slurry pump

Info

Publication number: CN219282081U
Application number: CN202223537550.6U
Authority: CN
Inventors: 姚孝祥
Original assignee: Wuxi Spring Hydro Equipment Co ltd
Current assignee: Wuxi Spring Hydro Equipment Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-30
Anticipated expiration: 2032-12-29

Abstract

The utility model belongs to the technical field and discloses a double-layer volute structure and a slurry pump, which comprise an outer shell and an inner shell, wherein an accommodating cavity is formed in the outer shell; the inner shell is arranged in the accommodating cavity, the inner shell comprises a leading-in channel and a leading-out channel, the leading-in channel is communicated with the leading-out channel, the leading-in channel extends along a first direction, the leading-out channel extends along a second direction, an included angle is formed between the first direction and the second direction, a solid-liquid mixed medium can enter from the leading-in channel and flow out from the leading-out channel, the inner shell is made of a ceramic material, the solid-liquid mixed medium can have better abrasion-resistant and corrosion-resistant effects, the service life is prolonged, the replacement frequency of a volute is reduced, the outer shell protects the inner shell outside, the safety of the inner shell is guaranteed, the service life of the inner shell is further prolonged, the replacement frequency of parts is reduced, and the production efficiency is improved.

Description

Double-layer volute structure and slurry pump

Technical Field

The utility model relates to the technical field of material pumping, in particular to a double-layer volute structure and a slurry pump.

Background

The slurry pump is a device for converting electric energy into kinetic energy and potential energy of a medium by a machine which increases the energy of a solid-liquid mixed medium by virtue of centrifugal force, and can be widely used for conveying slurry containing solid particles in industries such as electric power, metallurgy, coal, building materials and the like. The existing volute structure is mostly of a single-layer metal structure, corrosion resistance is poor, and due to the fact that conveyed media are provided with solid particles, certain abrasion is caused to the volute structure in the slurry pump, the service life of the volute is short, when the volute is abraded to a certain extent, the volute needs to be replaced and is high in replacement frequency, the replacement is frequent, a production line is stopped when the volute is replaced, production is delayed, and production efficiency is lowered.

Disclosure of Invention

The utility model aims to provide a double-layer volute structure and a slurry pump, which are used for solving the technical problems of frequent part replacement and slow production efficiency caused by the fact that a metal volute is not wear-resistant and has short service life.

To achieve the purpose, the utility model adopts the following technical scheme:

a double-layer volute structure comprising:

an outer case, in which an accommodating chamber is formed;

the inner shell body is arranged in the accommodating cavity and comprises an introduction channel and a discharge channel, the introduction channel is communicated with the discharge channel, the introduction channel extends along a first direction, the discharge channel extends along a second direction, an included angle is formed between the first direction and the second direction, a solid-liquid mixed medium can enter from the introduction channel and flow out from the discharge channel, and the inner shell body is made of ceramic materials.

Preferably, the introducing channel comprises a first introducing cavity and a second introducing cavity, the first introducing cavity and the second introducing cavity are distributed in a step shape, and the discharging channel is communicated with the second introducing cavity.

Preferably, the cross section of the second introducing cavity and the cross section of the first introducing cavity are both circular, the second introducing cavity and the first introducing cavity are coaxially arranged, and the diameter of the first introducing cavity is smaller than that of the second introducing cavity.

Preferably, the first direction is perpendicular to the second direction, and the axis of the outlet channel is tangential to the outer periphery of the second inlet chamber.

Preferably, the guiding-out channel is in a truncated cone shape, and the sectional area of the guiding-out channel gradually increases along the flowing direction of the solid-liquid mixed medium.

Preferably, the outer shell comprises a first shell and a second shell, the first shell is detachably connected with the second shell, and the first shell and the second shell are arranged to form the accommodating cavity.

Preferably, the first housing includes a plurality of first coupling holes, and the second housing includes a plurality of second coupling holes, and the first coupling holes and the second coupling holes are coupled by bolts.

Preferably, the outer housing is made of a metallic material.

Preferably, a gap is formed between the outer case and the inner case, an adhesive layer is provided in the gap, and the outer case and the inner case are adhered by the adhesive layer.

The slurry pump comprises a pump main body, a frame and the double-layer volute structure, wherein one end of the pump main body is connected with the inner shell, and the pump main body and the outer shell are connected with the frame.

The beneficial effects are that: the double-layer volute structure provided by the utility model comprises the inner shell and the outer shell, wherein the inner shell is internally provided with the accommodating cavity, the inner shell is arranged in the accommodating cavity, a solid-liquid mixed medium enters from the inlet channel and flows out from the outlet channel in the inner shell, the inner shell is made of ceramic materials, the solid-liquid mixed medium has better wear-resisting and corrosion-resisting effects, the service life is prolonged, the replacement frequency of the volute is reduced, the outer shell is externally used for protecting the inner shell, the double-layer volute structure is connected with the rack and other devices through the outer shell, the safety of the inner shell is ensured, the service life of the inner shell is further prolonged, the part replacement frequency is reduced, and the production efficiency is improved.

Drawings

Fig. 1 is a cross-sectional view of a double-layer volute structure provided by an embodiment of the present utility model;

fig. 2 is a second cross-sectional view of a double-layer volute structure according to an embodiment of the present utility model.

In the figure:

1. an outer housing; 11. a first housing; 111. a first connection hole; 12. a second housing; 121. a second connection hole; 13. a receiving chamber; 14. a first mounting hole; 15. a second mounting hole;

2. an inner housing; 21. an introduction channel; 211. a first introduction lumen; 212. a second introduction lumen; 22. a derivation channel; 23. a mounting cavity.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

The existing volute structure is mostly of a single-layer metal structure, corrosion resistance is poor, and due to the fact that conveyed media are provided with solid particles, certain abrasion is caused to the volute structure in the slurry pump, the service life of the volute is short, when the volute is abraded to a certain extent, the volute needs to be replaced and is high in replacement frequency, the replacement is frequent, a production line is stopped when the volute is replaced, production is delayed, and production efficiency is lowered.

Referring to fig. 1 and 2, the present embodiment provides a double-layer volute structure, which includes an inner casing 2 and an outer casing 1, wherein the inner casing 2 is made of ceramic material, and has better corrosion resistance and wear resistance when solid-liquid mixed medium is conveyed, so that the service life of the volute is prolonged; the outer shell 1 is sleeved on the outer side of the inner shell 2, plays a role in protecting the inner shell 2 with lower strength, and avoids the damage of the inner shell 2 caused by the connection of other devices with the inner shell 2.

The inside of the outer shell 1 forms a containing cavity 13; the inner shell 2 is arranged in the accommodating cavity 13, the inner shell 2 comprises a leading-in channel 21 and a leading-out channel 22, the leading-in channel 21 is communicated with the leading-out channel 22, the leading-in channel 21 extends along a first direction, the leading-out channel 22 extends along a second direction, an included angle is formed between the first direction and the second direction, a solid-liquid mixed medium can enter from the leading-in channel 21 and flow out of the leading-out channel 22, the inner shell 2 is made of a ceramic material, the solid-liquid mixed medium has better wear-resisting and corrosion-resisting effects, the service life is prolonged, the replacement frequency of a volute is reduced, the outer shell 1 is used for protecting the inner shell 2 outside, the double-layer volute structure is connected with a rack and other devices through the outer shell 1, the safety of the inner shell 2 is guaranteed, the service life of the inner shell 2 is further prolonged, the part replacement frequency is reduced, and the production efficiency is improved.

The introducing channel 21 comprises a first introducing cavity 211 and a second introducing cavity 212, the first introducing cavity 211 and the second introducing cavity 212 are distributed in a step shape, the introducing channel 22 is communicated with the second introducing cavity 212, and the solid-liquid mixed medium enters from the first introducing cavity 211, flows through the second introducing cavity 212 and flows out from the introducing channel 22.

Specifically, the cross section of the second introducing cavity 212 and the cross section of the first introducing cavity 211 are both circular, the second introducing cavity 212 and the first introducing cavity 211 are coaxially arranged, the diameter of the first introducing cavity 211 is smaller than that of the second introducing cavity 212, when the double-layer volute structure is connected with the pump body, the impeller of the pump body is arranged in the second introducing cavity 212, the second introducing cavity 212 with the circular cross section can be matched with the impeller, meanwhile, the solid-liquid mixed medium flows in the coaxial first introducing cavity 211, the solid-liquid mixed medium can be diffused from the center of the second introducing cavity 212 to the periphery under the action of the impeller, and the liquid pumping effect is improved.

In order to mount the impeller, a mounting chamber 23 is provided in the inner housing 2, the mounting chamber 23 being arranged coaxially with the introduction passage 21 and at an end of the second introduction chamber 212 remote from the first introduction chamber 211, the impeller being arranged in the second introduction chamber 212 through the mounting chamber 23.

Further, the first direction is perpendicular to the second direction, the axis of the guiding channel 22 is tangential to the outer periphery of the second guiding cavity 212, the solid-liquid mixed medium diffuses from the center of the second guiding cavity 212 to the periphery, rotates around the second guiding cavity 212 along with the rotation of the impeller, the pressure of the solid-liquid mixed medium gradually increases, and the guiding channel 22 is tangential to the outer periphery of the second guiding cavity 212, so that the solid-liquid mixed medium can keep larger pressure to flow into the guiding channel 22, and the pumping effect is ensured.

Further, the guiding-out channel 22 is in a shape of a truncated cone, and the sectional area of the guiding-out channel 22 is gradually increased along the flowing direction of the solid-liquid mixed medium, so that the solid-liquid mixed medium can be smoothly conveyed out of the guiding-out channel 22.

The shell body 1 includes first shell 11 and second shell 12, and first shell 11 can dismantle with second shell 12 and be connected, and first shell 11 encloses with second shell 12 and establishes and form holding chamber 13, and holding chamber 13 is arranged in to interior casing 2, and shell body 1 can play the guard action to interior casing 2, and detachable first shell 11 has reduced the preparation degree of difficulty with second shell 12, can conveniently change interior casing 2 simultaneously, avoids long-time shutdown to stop production, improves production efficiency.

The first shell 11 includes a plurality of first connecting holes 111, and the second shell 12 includes a plurality of second connecting holes 121, and first connecting holes 111 pass through bolted connection with second connecting holes 121, and firm in connection, and it is convenient to dismantle, reduces the degree of difficulty of installation dismantlement, accelerates the efficiency of changing the part.

Specifically, the first connection holes 111 and the second connection holes 121 are all disposed on the connection surfaces of the first housing 11 and the second housing 12, the plurality of first connection holes 111 are disposed at uniform intervals along the circumferential side of the first housing 11, the plurality of second connection holes 121 are disposed at uniform intervals along the circumferential side of the second housing 12, the number of the first connection holes 111 and the second connection holes 121 is not limited, and the number of the first connection holes 111 and the second connection holes 121 can be set according to the actual volute size and engineering requirements.

In this embodiment, the outer casing 1 is made of a metal material, so that the strength of the inner casing 2 can be made up, the inner casing 2 is protected, when the inner casing 2 is damaged, the outer casing 1 can also prevent leakage, and the outer casing 1 can be reused after the inner casing 2 is replaced, so that the cost is saved; the metal material can also compensate for the problem that the ceramic material is difficult to finely process, and the double-layer volute structure is connected with other devices by finely processing the metal outer shell 1 by punching a threaded hole and the like.

Further, a gap is formed between the outer shell 1 and the inner shell 2, an adhesive layer is arranged in the gap, the outer shell 1 and the inner shell 2 are adhered through the adhesive layer, an integral body is formed between the outer shell 1 and the inner shell 2 relatively, meanwhile, the adhesive layer can play a certain role in damping, damage to the inner shell 2 is avoided, and the service life of the inner shell 2 is further prolonged.

The embodiment also provides a slurry pump, which comprises a pump main body, a frame and the double-layer volute structure, wherein one end of the pump main body is connected with the inner shell 2, and the pump main body and the outer shell 1 are both connected with the frame.

Specifically, the pump body includes a driving mechanism and an impeller, the driving mechanism can drive the impeller to rotate around its own axis, and perform centrifugal motion on the solid-liquid mixed medium entering from the first introduction chamber 211, and the solid-liquid mixed medium diffuses from the center of the second introduction chamber 212 to the periphery along with rotation of the impeller, and finally enters the discharge passage 22.

The kind of the driving mechanism is not limited here, and in this embodiment, the motor is specifically used to directly drive the impeller, and in other embodiments, other driving mechanisms may be used to drive the impeller.

Specifically, the outer case 1 is provided with a plurality of first mounting holes 14 and a plurality of second mounting holes 15, the plurality of second mounting holes 15 being uniformly spaced around the axis of the first introduction chamber 211, the second mounting holes 15 being uniformly spaced around the axis of the introduction passage 22, and the outer case 1 being connected to the frame through the first mounting holes 14 and the second mounting holes 15.

The number of the first mounting holes 14 and the second mounting holes 15 is not limited herein, and may be set according to actual needs.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Double-deck spiral case structure, its characterized in that includes:

an outer case (1) having an accommodation chamber (13) formed therein;

the inner shell (2) is arranged in the accommodating cavity (13), the inner shell (2) comprises an introduction channel (21) and a discharge channel (22), the introduction channel (21) is communicated with the discharge channel (22), the introduction channel (21) extends along a first direction, the discharge channel (22) extends along a second direction, an included angle is formed between the first direction and the second direction, a solid-liquid mixed medium can enter from the introduction channel (21) and flow out from the discharge channel (22), and the inner shell (2) is made of a ceramic material.

2. The double-layer volute structure of claim 1, wherein the introduction passage (21) includes a first introduction chamber (211) and a second introduction chamber (212), the first introduction chamber (211) and the second introduction chamber (212) being distributed stepwise, and the discharge passage (22) being in communication with the second introduction chamber (212).

3. The double-layer volute structure of claim 2, wherein the cross section of the second introduction chamber (212) and the cross section of the first introduction chamber (211) are both circular, the second introduction chamber (212) is arranged coaxially with the first introduction chamber (211), and the diameter of the first introduction chamber (211) is smaller than the diameter of the second introduction chamber (212).

4. A double-layer volute structure according to claim 3, characterized in that the first direction is perpendicular to the second direction, the axis of the lead-out channel (22) being tangential to the outer periphery of the second lead-in chamber (212).

5. The double-layer volute structure according to claim 1, wherein the discharge passage (22) has a truncated cone shape, and a cross-sectional area of the discharge passage (22) gradually increases in a flow direction of the solid-liquid mixed medium.

6. The double-layer volute structure according to claim 1, wherein the outer housing (1) comprises a first housing (11) and a second housing (12), the first housing (11) and the second housing (12) are detachably connected, and the first housing (11) and the second housing (12) enclose to form the accommodating cavity (13).

7. The double-layer volute structure of claim 6, wherein the first housing (11) includes a plurality of first connection holes (111), the second housing (12) includes a plurality of second connection holes (121), and the first connection holes (111) and the second connection holes (121) are connected by bolts.

8. The double-layer volute structure of claim 1, wherein the outer housing (1) is made of a metallic material.

9. The double-layer volute structure according to claim 1, characterized in that a gap is provided between the outer housing (1) and the inner housing (2), an adhesive layer is provided in the gap, and the outer housing (1) and the inner housing (2) are adhered by the adhesive layer.

10. The slurry pump is characterized by comprising a pump main body, a frame and the double-layer volute structure according to any one of claims 1-9, wherein one end of the pump main body is connected with the inner shell (2), and the pump main body and the outer shell (1) are connected with the frame.