Impeller and foam pump

Abstract

The utility model relates to the technical field of foam pumps, and discloses an impeller and a foam pump, the impeller comprises a front ceramic piece, a rear ceramic piece and a metal framework, the front ceramic piece comprises a front cover plate, blades and guide blades which are connected in sequence; the rear ceramic piece comprises a rear cover plate, the rear cover plate is arranged on the side, away from the blades, of the front cover plate and spliced with the front cover plate, and a fixing cavity is formed between the rear cover plate and the front cover plate. The metal framework comprises a first supporting piece, a second supporting piece and a third supporting piece which are connected, the first supporting piece is arranged in the fixing cavity, the second supporting piece is embedded in the blade, and the third supporting piece is embedded in the guide blade. According to the utility model, the front ceramic piece and the rear ceramic piece are respectively and integrally formed, and when the front ceramic piece and the rear ceramic piece need to be connected, the front cover plate and the rear cover plate are spliced; after the front ceramic piece and the rear ceramic piece are integrally formed respectively, the metal framework is embedded into the blades and the guide vanes, and then the front cover plate and the rear cover plate are spliced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a foam pump technical field, concretely relates to a kind of impeller and foam pump. BACKGROUND

[0002] In the mining process, foam pump is mainly used in flotation process, by its special design, it can effectively transport the ore pulp containing foam, and eliminate the foam in slurry, ensure the smooth progress of process.

[0003] Foam pump generally includes pump body and impeller built-in pump body, and the ore pulp containing foam is transported by rotating impeller, and the foam in ore pulp is eliminated, in the existing foam pump, in order to guide the foam in ore pulp into pump body, flow guide vane is arranged on impeller, and flow guide vane extends into the inlet of pump body.

[0004] In the foam pump provided with flow guide vane, since flow guide vane extends from impeller to the inlet of pump body, flow guide vane deviates from impeller, and may be broken when colliding with particles in ore pulp. SUMMARY

[0005] The utility model aims at overcoming the above technical deficiencies, and provides an impeller and foam pump, to solve the technical problem that flow guide vane may be broken in prior art.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] In the first aspect, the utility model provides an impeller, which comprises:

[0008] Front ceramic piece, comprising front cover plate, blade and guide vane connected in sequence;

[0009] Rear ceramic piece, comprising rear cover plate, the rear cover plate is arranged on the side of front cover plate away from blade, and is spliced with front cover plate, and fixed cavity is formed between rear cover plate and front cover plate; and

[0010] Metal framework, comprising first support, second support and third support connected, first support is arranged in fixed cavity, second support is embedded in blade, and third support is embedded in guide vane.

[0011] In one embodiment, the impeller further comprises a first adhesive layer, the first adhesive layer is built-in fixed cavity, and connects front cover plate and rear cover plate.

[0012] In one embodiment, the first adhesive layer is arranged in the gap between second support and blade.

[0013] In one embodiment, the first support member and the second support member are integrally formed, and the third support member and the second support member are separately formed.

[0014] In one embodiment, one section of the third support is built into the guide vane, and another section extends into the blade and is connected to the second support, and the size of the portion of the third support extending from the guide vane into the blade gradually decreases.

[0015] In one embodiment, the second support member has a mounting hole that communicates with the fixing cavity and extends through the side of the second support member away from the rear cover plate.

[0016] The third support member is a flexible skeleton, which is inserted into the mounting hole and passes through the second support member via the mounting hole.

[0017] In one embodiment, the mounting hole penetrates the first support member, and the soft skeleton extends through the mounting hole into the fixing cavity.

[0018] Secondly, this utility model also provides a foam pump, including a pump housing and an impeller as described above, wherein the pump housing is provided with an inlet, the impeller is built into the pump housing, and the guide vane extends into the inlet.

[0019] In one embodiment, the pump housing includes a first metal shell, a second metal shell, a third metal shell, a front guard plate, a volute, and a rear guard plate. The first metal shell, the second metal shell, and the third metal shell are connected in sequence. The first metal shell and the third metal shell are disposed at both ends of the second metal shell. The front guard plate is connected to the first metal shell, the volute is connected to the second metal shell, and the rear guard plate is connected to the third metal shell. The front guard plate and the rear guard plate are respectively disposed at both ends of the volute and together form a receiving cavity. The front guard plate has an inlet communicating with the receiving cavity, and the rear guard plate has a fixing hole communicating with the receiving cavity.

[0020] In one embodiment, the front guard plate is bonded to the first metal shell, the volute shell to the second metal shell, and the rear guard plate to the third metal shell by a third adhesive layer.

[0021] Compared with the prior art, the impeller and the foam pump provided by the utility model have the advantages that the guide vanes can extend into the inlet of the pump body, can guide the foam in the ore pulp into the pump body and preliminarily break the foam in the ore pulp, the material of the front cover plate, the vane, the guide vane and the rear cover plate is ceramic, the ceramic has high structural strength and wear resistance and can withstand the wear and corrosion of the high-speed flowing ore pulp, the ceramic has high hardness but is brittle, therefore, the utility model is provided with a metal framework, the metal framework has good impact resistance and strength, can enhance the impact resistance of the front cover plate, the vane, the guide vane and the rear cover plate and avoid the breakage of the guide vane and the vane, meanwhile, the metal framework is connected with the front cover plate, the vane, the guide vane and the rear cover plate, can more effectively disperse and transfer the load, so that the load can be more evenly distributed when the whole impeller bears external force, and the local stress concentration is reduced.

[0022] In the utility model, the front ceramic part and the rear ceramic part are integrally formed respectively, when the connection of the front ceramic part and the rear ceramic part needs to be realized, the front cover plate and the rear cover plate can be spliced, meanwhile, since the front cover plate and the rear cover plate are spliced, the metal framework can be embedded in the vane and the guide vane after the front ceramic part and the rear ceramic part are integrally formed respectively, then the front cover plate and the rear cover plate are spliced, after splicing, the metal framework is packaged in the impeller, the processing difficulty of the impeller is reduced and production is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the structure schematic view of the foam pump provided by an embodiment of the utility model;

[0024] Figure 2 is the structure schematic view of the pump shell part in the foam pump provided by an embodiment of the utility model;

[0025] Figure 3 is the structure schematic view of the impeller provided by an embodiment of the utility model;

[0026] Figure 4 is the structure schematic view of the impeller provided by an embodiment of the utility model;

[0027] Figure 5 is Figure 4 is the local enlarged schematic view of A in the structure schematic view of the impeller.

[0028] EXPLANATION OF REFERENCE NUMERALS:

[0029] Front ceramic piece 1; Front cover plate 11; Blade 12; Guide vane 13; Cavity 14; Rear ceramic piece 2; Rear cover plate 21; Back rib 22; Metal framework 3; First support 31; Second support 32; Third support 33; Mounting hole 34; First adhesive layer 4; Pump shell piece 5; First metal shell 51; Second metal shell 52; Third metal shell 53; Front guard plate 54; Spiral shell 55; Rear guard plate 56; Second adhesive layer 57; Fixing cavity a. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0031] In order to solve the technical problem that the guide vane may break in the prior art, the utility model provides a kind of impeller and foam pump, can avoid the breakage of guide vane.

[0032] It should be noted that the impeller in the utility model is used for but not limited to foam pump etc., in order to facilitate explanation, in the utility model, only take the impeller as an example for explanation in foam pump, and the principle of impeller applied in other types of equipment and applied in foam pump is substantially same, here is not described one by one.

[0033] Please refer to Figure 3 , Figure 3 It is the structure diagram of the impeller in an embodiment of the utility model, an impeller, including front ceramic piece 1, rear ceramic piece 2 and metal framework 3, front ceramic piece 1 includes front cover plate 11, blade 12 and guide vane 13 connected in sequence;Rear ceramic piece 2 includes rear cover plate 21, rear cover plate 21 is set to the side of front cover plate 11 away from blade 12, and is spliced with front cover plate 11, and fixing cavity a is formed between rear cover plate 21 and front cover plate 11;Metal framework 3 includes first support 31, second support 32 and third support 33 connected, first support 31 is set in fixing cavity a, second support 32 is embedded in blade 12, and third support 33 is embedded in guide vane 13.

[0034] Specifically, by setting the guide vane 13, the guide vane 13 can extend into the inlet of the pump body, can guide the foam in the ore pulp into the pump body, and can preliminarily crush the foam in the ore pulp; by setting the material of the front cover plate 11, the blade 12, the guide vane 13 and the rear cover plate 21 as ceramic, the ceramic has high structural strength and wear resistance, and can withstand the wear and corrosion of high-speed flowing ore pulp; the ceramic has high hardness but the material is brittle, therefore, in the utility model, the metal framework 3 is arranged, the metal framework 3 has good impact resistance and strength, can enhance the impact resistance of the front cover plate 11, the blade 12, the guide vane 13 and the rear cover plate 21, and avoid the guide vane 13 and the blade 12 from breaking; meanwhile, the metal framework 3 is connected with the front cover plate 11, the blade 12, the guide vane 13 and the rear cover plate 21, can more effectively disperse and transfer the load, so that the load can be more evenly distributed when the whole impeller bears external force, and the local stress concentration is reduced.

[0035] In the utility model, the front ceramic part 1 and the rear ceramic part 2 are integrally formed respectively, when it is needed to realize the connection of the front ceramic part 1 and the rear ceramic part 2, the front cover plate 11 and the rear cover plate 21 can be spliced; meanwhile, since the front cover plate 11 and the rear cover plate 21 are spliced, after the front ceramic part 1 and the rear ceramic part 2 are integrally formed respectively, then the metal framework 3 is embedded in the blade 12 and the guide vane 13, the front cover plate 11 and the rear cover plate 21 are spliced, after splicing, the metal framework 3 is packaged in the impeller, the processing difficulty of the impeller is reduced, and production is facilitated.

[0036] It should be understood that the splicing between the front cover plate 11 and the rear cover plate 21 can be realized by bolt connection, screw connection, buckle connection and adhesion and the like, as shown in Figure 3 and Figure 5 In one of the embodiments, the impeller further comprises a first adhesive layer 4, the first adhesive layer 4 is built-in in the fixing cavity a, and connects the front cover plate 11 and the rear cover plate 21.

[0037] By setting the first adhesive layer 4, the first adhesive layer 4 is built-in in the fixing cavity a, the connection of the front cover plate 11 and the rear cover plate 21 can be realized, meanwhile, the first adhesive layer 4 can also fill the gap between the front cover plate 11 and the rear cover plate 21, and realize the stable connection between the metal framework 3 and the front cover plate 11 and the rear cover plate 21.

[0038] The first adhesive layer 4 is formed after the adhesive is injected into the fixing cavity a and solidified.

[0039] In order to embed the second support 32 into the blade 12, there can be a gap between the second support 32 and the blade 12, the existence of the gap will affect the connection strength between the second support 32 and the blade 12, and affect the strength of the blade 12, therefore, the first adhesive layer 4 is arranged in the gap between the second support 32 and the blade 12.

[0040] Through the above setting, the first adhesive layer 4 can also fill the gap between the second support 32 and the blade 12, avoiding the influence of the gap on the support of the second support 32 to the blade 12, and at the same time, the first adhesive layer 4 can flow into the gap between the second support 32 and the blade 12 through the fixed cavity a, facilitating the entry of the adhesive.

[0041] It should be understood that the third support 33 can be a hard metal or a metal with a certain flexibility.

[0042] It should be understood that the first support 31, the second support 32 and the third support 33 can be integrally formed or separately formed. Specifically, in one of the embodiments, the first support 31 and the second support 32 are integrally formed, and the third support 33 is separately formed from the second support 32.

[0043] Since the guide vane is a three-dimensional curved surface structure, the third support 33 needs to adapt to the shape of the guide vane. If the first support 31, the second support 32 and the third support 33 are integrally formed, the third support 33 with a complex structure needs to be integrally formed, which is difficult. Therefore, in the present embodiment, the first support 31 and the second support 32 are integrally formed, and the first support 31 and the second support 32 integrally formed have sufficient structural strength, and the third support 33 is separately formed from the first support 31, which can reduce the processing difficulty of the metal framework 3. The third support 33 after separate forming can be connected with the second support 32 and the first support 31 by bonding and welding.

[0044] Since the size of the guide vane is smaller than that of the blade 12, and the third support 33 is embedded in the guide vane, the size of the third support 33 is limited, and the size of the connection between the third support 33 and the second support 32 is limited, which affects the structural strength. Therefore, in one of the embodiments, one segment of the third support 33 is built into the guide vane, another segment extends into the blade 12 and is connected with the second support 32, and the size of the part of the third support 33 extending from the guide vane into the blade 12 gradually increases.

[0045] In the present embodiment, by extending the third support 33 into the blade 12, there is enough space in the blade 12, so that the size of the third support 33 can be set larger, the connection size when the third support 33 is connected with the second support 32 can be increased, and the structural strength between the second support 32 and the third support 33 is enhanced.

[0046] In one embodiment, the third support member 33 is made of hard metal. In this case, the blade 12 and the guide vane 13 form a cavity 14 that communicates with the fixed cavity a. The blade 12 and the guide vane 13 are formed first, and then molten metal is injected into the cavity 14. After the molten metal solidifies, a hard second support member 32 and a hard third support member 33 are formed. Then the hard second support member 32 is connected to the first support member 31 to form a metal skeleton 3.

[0047] In this embodiment, the third support member 33 is made of hard metal. The second support member 32 and the third support member 33 formed after the molten metal is solidified are solidified together with the blade 12 and the guide vane 13, so that the hard second support member 32 and the third support member 33 can enhance the impact resistance and structural strength of the blade 12 and the guide vane 13.

[0048] Because the guide vane 13 is an arc-shaped and twisted blade 12 structure, in order to form a cavity 14 within the blade 12 and guide vane 13, it is necessary to use methods such as lost foam casting to place the lost foam within the blade 12 and guide vane 13 before molding. During the molding process of the blade 12 and guide vane 13, the lost foam disappears to form the cavity 14. However, the guide vane 13 is relatively thin, and the size of the cavity 14 that can be formed is relatively small. The molten metal is not easy to enter the small cavity 14, and it cannot be guaranteed that the molten metal will fill the cavity 14. Therefore, such as Figure 5 As shown, in one embodiment, the second support member 32 has a mounting hole 34, which is connected to the fixing cavity a and passes through the side of the second support member 32 away from the rear cover plate 21; the third support member 33 is a soft skeleton, which is inserted into the mounting hole 34 and passes through the second support member 32 through the mounting hole 34.

[0049] By inserting the third support member 33 into the second support member 32 through the mounting hole 34, compared to connecting the end of the third support member 33 to the second support member 32, the contact area between the third support member 33 and the second support member 32 is increased, which is beneficial to strengthening the connection strength between the third support member 33 and the second support member 32. At the same time, the blade 12 and the guide vane 13 form a cavity 14 that communicates with the fixed cavity a. The third support member 33 is inserted into the second support member 32 through the mounting hole 34 and embedded in the guide vane 13. Since the third support member 33 adopts a flexible skeleton, the flexible skeleton can adapt to the bending shape of the guide vane 13. At the same time, if the blade 12 and the guide vane 13 are formed first, the third support member 33 made of the flexible skeleton can adapt to the shape of the cavity 14 in the guide vane 13 and bend and twist accordingly, so that the third support member 33 can enter the preset position in the guide vane 13. Compared with the method of injecting molten metal, this embodiment can avoid the problem that molten metal cannot enter the cavity 14 in the guide vane 13.

[0050] Meanwhile, in the process of arranging the first adhesive layer 4 towards the fixed cavity a, the first adhesive layer 4 can fill the gap between the second support 32, the third support 33 and the inner wall of the cavity 14, and realize the connection of the second support 32 and the third support 33 with the blade 12 and the guide vane 13.

[0051] The third support 33 can be a steel wire, a steel wire mesh or a steel sheet with certain flexibility.

[0052] In one of the embodiments, the mounting hole 34 penetrates the first support 31, and the soft framework extends to the fixed cavity a through the mounting hole 34.

[0053] Through the above arrangement, the third support 33 simultaneously connects the first support 31, the second support 32 and the first adhesive layer 4 in the fixed cavity a, strengthens the connection of the third support 33 with the first support 31, the second support 32 and the first adhesive layer 4, and can strengthen the connection between the guide vane and the blade 12, the rear cover plate 21 and the front cover plate 11; meanwhile, the third support 33 can pass through the first support 31 and be installed in place after the first support 31 is installed, and the first support 31 and the second support 32 can play the role of support and guidance during the installation process.

[0054] As shown in the drawings, Figure 3 In one of the embodiments, the rear ceramic part 2 further comprises a plurality of back rib plates 22, which are arranged on the side of the rear cover plate 21 away from the front cover plate 11 and are distributed along the circumference of the rear cover plate 21.

[0055] Through the arrangement of the plurality of back rib plates 22, the structural strength of the side of the rear cover plate 21 away from the front cover plate 11 can be strengthened.

[0056] As shown in the drawings, Figure 3 In one of the embodiments, the rear cover plate 21 is provided with a trumpet opening along the axial direction, the trumpet opening penetrates the rear cover plate 21, the first support 31 is embedded in the fixed cavity a and the trumpet opening, and a hub structure is formed in the trumpet opening.

[0057] When it is necessary to inject adhesive into the fixed cavity a, the adhesive is injected into the fixed cavity a through the trumpet opening, and the adhesive is solidified to form the first adhesive layer 4.

[0058] As shown in the drawings, Figure 1 The utility model further provides a foam pump, which comprises a pump shell part 5 and an impeller, the pump shell part 5 is provided with an inlet, and the impeller is arranged in the pump shell part 5, and the guide vane 13 extends into the inlet.

[0059] The guide vane 13 can extend into the inlet of the pump body, guide the foam in the ore pulp into the pump body, and preliminarily crush the foam in the ore pulp.

[0060] As shown in the drawings, Figure 2As shown, in one embodiment, the pump housing 5 includes a first metal housing 51, a second metal housing 52, a third metal housing 53, a front guard plate 54, a volute 55, and a rear guard plate 56. The first metal housing 51, the second metal housing 52, and the third metal housing 53 are connected in sequence. The first metal housing 51 and the third metal housing 53 are disposed at both ends of the second metal housing 52. The front guard plate 54 is connected to the first metal housing 51, the volute 55 is connected to the second metal housing 52, and the rear guard plate 56 is connected to the third metal housing 53. The front guard plate 54 and the rear guard plate 56 are respectively disposed at both ends of the volute 55 and together form a receiving cavity. The front guard plate 54 has an inlet communicating with the receiving cavity, and the rear guard plate 56 has a fixing hole communicating with the receiving cavity.

[0061] In this application, the pump casing is formed by combining a metal shell with a front guard plate 54, a volute 55, and a rear guard plate 56. During use, the slurry only comes into contact with the front guard plate 54, the volute 55, and the rear guard plate 56, which can extend the service life of the first metal shell 51, the second metal shell 52, and the third metal shell 53 and prevent the first metal shell 51, the second metal shell 52, and the third metal shell 53 from being worn down by the slurry.

[0062] The front skid plate 54, the volute 55, and the rear skid plate 56 can be made of ceramic, rubber, or wear-resistant metal, etc. Specifically, in one embodiment, the front skid plate 54, the volute 55, and the rear skid plate 56 are made of sintered ceramic.

[0063] The front guard plate 54, the volute 55, and the rear guard plate 56 can be connected to the metal shell by adhesive, bolts, or screws.

[0064] Specifically, such as Figure 2 As shown, in one embodiment, the front guard plate 54 is bonded to the first metal shell 51, the volute 55 is bonded to the second metal shell 52, and the rear guard plate 56 is bonded to the third metal shell 53 by a second adhesive layer 57.

[0065] By setting the second adhesive layer 57, the connection between the front guard plate 54 and the first metal shell 51, the connection between the volute 55 and the second metal shell 52, and the connection between the rear guard plate 56 and the third metal shell 53 can be realized. At the same time, the front guard plate 54, the volute 55 and the rear guard plate 56 are connected to the metal shells through the second adhesive layer 57.

[0066] The second adhesive layer 57 can be a solid adhesive or a flowable adhesive that has been cured.

[0067] It should be understood that the front skid plate 54, the volute 55, and the rear skid plate 56 can be connected by means of adhesive bonding, bolts, etc. Specifically, for example... Figure 2As shown, in one embodiment, the volute 55 has openings at both ends, the openings being frustoconical in shape, and their inner diameter gradually decreasing towards the interior of the volute 55. The front guard plate 54 and the rear guard plate 56 are partially inserted into the openings to form a receiving cavity between the spliced ​​front guard plate 54, volute 55, and rear guard plate 56.

[0068] In this embodiment, the front guard plate 54 and the rear guard plate 56 cooperate with the opening to form a conical sealing structure, which can prevent the slurry from flowing out from the gap between the front guard plate 54, the volute 55 and the rear guard plate 56.

[0069] like Figure 2 As shown, in one embodiment, the second metal shell 52 has a through hole that is connected to the interior of the second metal shell 52. The dimensions of the peripheral walls of the front guard plate 54 and the rear guard plate 56 are matched with the inner wall of the through hole, and the peripheral walls of the front guard plate 54 and the rear guard plate 56 are attached to and abut against the second adhesive layer 57 between the volute 55 and the second metal shell 52.

[0070] Because there is a frustum-shaped mating structure between the openings of the front guard plate 54 and the rear guard plate 56, interference will occur between the peripheral walls of the front guard plate 54 and the rear guard plate 56 and the inner wall of the through hole when the front guard plate 54 and the rear guard plate 56 are inserted into the opening. Therefore, in this embodiment, the front guard plate 54 and the rear guard plate 56 are provided with a second adhesive layer 57 that fits and abuts against the volute 55 and the second metal shell 52. The second adhesive layer 57 has a certain elasticity. When the front guard plate 54 and the rear guard plate 56 are inserted into the opening, the peripheral walls of the front guard plate 54 and the rear guard plate 56 fit against the second adhesive layer 57 and can drive the second adhesive layer 57 to deform, so as to avoid interference. At the same time, the elastic abutment between the front guard plate 54 and the rear guard plate 56 and the second adhesive layer 57 can prevent the formation of gaps between the peripheral walls of the front guard plate 54 and the rear guard plate 56 and the second adhesive layer 57, and prevent the slurry from flowing out from the gaps.

[0071] like Figure 3 As shown, in one embodiment, the side of the back rib 22 facing away from the front cover plate 11 is an inclined surface, and the inclined surface gradually approaches the rear guard plate 56 along the axis close to the rear cover plate 21.

[0072] In this embodiment, the back rib 22 gradually approaches the rear guard plate 56 along the axis close to the rear cover plate 21, so that the gap between the back rib 22 and the rear guard plate 56 gradually decreases along the axis close to the rear cover plate 21, which can block the slurry from flowing towards the center of the rear guard plate 56 and prevent the slurry from flowing outward from the center of the rear guard plate 56.

[0073] The specific implementation of the utility model above does not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An impeller, characterized by, The impeller comprises: a front ceramic part comprising a front cover plate, a blade and a guide vane connected in sequence; a rear ceramic part comprising a rear cover plate arranged on a side of the front cover plate away from the blade and spliced with the front cover plate, and a fixing cavity formed between the rear cover plate and the front cover plate; and a metal framework comprising a first support, a second support and a third support connected in sequence, the first support being arranged in the fixing cavity, the second support being embedded in the blade, and the third support being embedded in the guide vane.

2. The impeller according to claim 1, further comprising a first adhesive layer arranged in the fixing cavity and connecting the front cover plate and the rear cover plate.

3. The impeller according to claim 2, wherein the first adhesive layer is arranged in a gap between the second support and the blade.

4. The impeller according to claim 2, wherein the first support is integrally formed with the second support, and the third support is separately formed with the second support.

5. The impeller according to claim 4, wherein one section of the third support is arranged in the guide vane, another section of the third support extends into the blade and is connected with the second support, and the size of the section of the third support extending into the blade from the guide vane gradually increases.

6. The impeller according to claim 4, wherein the second support is provided with a mounting hole, the mounting hole is communicated with the fixing cavity, and the mounting hole penetrates through a side of the second support away from the rear cover plate; the third support is a soft framework, the soft framework is inserted into the mounting hole and passes through the second support through the mounting hole.

7. The impeller according to claim 6, wherein the mounting hole penetrates through the first support, and the soft framework extends into the fixing cavity through the mounting hole. The foam pump comprises a pump shell part and the impeller according to any one of claims 1-7, the pump shell part is provided with an inlet, the impeller is arranged in the pump shell part, and the guide vane extends into the inlet.

9. The foam pump according to claim 8, wherein the pump shell part comprises a first metal shell, a second metal shell, a third metal shell, a front guard plate, a volute and a rear guard plate, the first metal shell, the second metal shell and the third metal shell are connected in sequence, the first metal shell and the third metal shell are arranged at two ends of the second metal shell, the front guard plate is connected with the first metal shell, the volute is connected with the second metal shell, the rear guard plate is connected with the third metal shell, the front guard plate and the rear guard plate are arranged at two ends of the volute respectively, and a containing cavity is formed by the front guard plate and the rear guard plate, the front guard plate is provided with the inlet communicated with the containing cavity, and the rear guard plate is provided with a fixing hole communicated with the containing cavity.

10. The foam pump according to claim 9, wherein the front guard plate, the first metal shell, the volute, the second metal shell and the rear guard plate and the third metal shell are connected by a third adhesive layer. ​ ​ ​ 8. A foam pump characterized by, ​ ​ ​ ​ ​

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