Production method of fairing, fairing, mold assembly and mine submersible pump

Abstract

The application provides a production method of a fairing, the fairing, a mold assembly and a mine submersible pump. The production method comprises the following steps: wrapping a preset processing layer on the outer side of the inner film in the circumferential direction; the preset processing layer comprises a vacuum bag and a fiber cloth arranged in the vacuum bag; a first preset amount of a first colloid is injected into the vacuum bag; after the first colloid in the vacuum bag is solidified, the vacuum bag is removed; the fiber cloth and the solidified first colloid are combined to form a preset body layer; the outer film is sleeved on the outer side of the preset body layer; the axial ends of the inner film abut against two end covers respectively; a sealing space in the shape of a cylinder is formed between the inner circumferential wall of the second cylinder, the preset body layer and the two end covers; a second preset amount of a second colloid is injected into the sealing space; the solidified second colloid and the preset body layer are combined to form the fairing; and the inner film and the outer film are detached from the fairing. The fairing generated by the production method has a lighter weight, and the problem of the heavy weight of the fairing of the existing mine submersible pump is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fairing, in particular to a production method of fairing, fairing, mold assembly and mine submersible pump. BACKGROUND

[0002] In the technical field of coal mine submersible electric pump, the current mine submersible electric pump (hereinafter referred to as water pump) mainly adopts carbon structural steel or cast iron shell. Because the density of metal material is large, the overall weight of the water pump is heavy. For small power (generally ≤4kW) water pump, the workers mainly use manual carrying to move in the coal mine, and the labor intensity of the workers is large. Moreover, the heavy weight is more likely to cause potential safety risks such as bumps to the carrying operators.

[0003] In order to reduce the weight of the water pump as much as possible, there are two main methods, one is thinning design, and the other is to replace the existing water pump fairing material with light or non-metallic material. Specifically, stainless steel material is used to replace carbon structural steel or cast iron, and the wall thickness of the fairing shell is thinned. Alternatively, light metal or non-metallic material is used to replace the ordinary water pump shell, but light metal and ordinary non-metallic material do not meet the safety requirements of coal mine.

[0004] Although the strength of stainless steel is better than that of carbon structural steel or cast iron, the density of the two is almost the same. Considering the structural strength, although the thickness is thinned, the weight reduction effect is not obvious. Light metals commonly used are aluminum, magnesium, titanium and zirconium. According to the relevant provisions of GB3836, the content should not exceed 15%, so it is basically impossible to reduce the weight.

[0005] It can be seen that the fairing of the mine submersible pump in the prior art has the problem of heavy weight. SUMMARY

[0006] The main purpose of the present application is to provide a production method of fairing, fairing, mold assembly and mine submersible pump, so as to solve the problem of heavy weight of the fairing of the mine submersible pump in the prior art.

[0007] In order to achieve the above object, according to one aspect of the present application, a method for producing a fairing is provided, which comprises: step S1, wrapping a preset processing layer on the outer circumferential side of an inner film in a cylindrical structure; wherein the preset processing layer comprises a vacuum bag and a fiber cloth arranged in the vacuum bag; step S2, injecting a first preset amount of a first gel into the vacuum bag, so that the fluid-like first gel penetrates into the fiber cloth and wraps the fiber cloth; the first gel comprises a resin material; step S3, after the first gel in the vacuum bag solidifies, removing the vacuum bag; the fiber cloth and the solidified first gel combine to form a preset body layer; step S4, sleeving an outer film on the outer side of the preset body layer; wherein the outer film comprises a second cylinder and two end covers, the two end covers are arranged at the axial two ends of the second cylinder respectively, and the axial two ends of the inner film abut against the two end covers respectively, so that the outer film and the inner film are relatively fixed; a sealing space in a cylindrical shape is formed between the inner circumferential wall of the second cylinder, the preset body layer and the two end covers; step S5, injecting a second preset amount of a second gel into the sealing space, so that the fluid-like second gel penetrates into the preset body layer and wraps the preset body layer; the second gel comprises a resin material and silicon carbide; step S6, after the second gel solidifies, the solidified second gel and the preset body layer combine to form the fairing; and the inner film and the outer film are detached from the fairing.

[0008] Further, a first air outlet and a first glue injection port are arranged on the vacuum bag, and the first air outlet and the first glue injection port are in communication with the inner cavity of the vacuum bag; the method for injecting the first preset amount of the first gel into the vacuum bag comprises: performing air extraction on the inner cavity of the vacuum bag through the first air outlet, and simultaneously performing glue injection into the inner cavity of the vacuum bag through the first glue injection port; after the first preset amount of the first gel is injected into the inner cavity of the vacuum bag, the air extraction and the glue injection are stopped.

[0009] Further, the outer film comprises a second air outlet and a second glue injection port, and the second air outlet and the second glue injection port are in communication with the sealing space; the method for injecting the second preset amount of the second gel into the sealing space comprises: performing air extraction on the sealing space through the second air outlet, and simultaneously performing glue injection into the sealing space through the second glue injection port; after the second preset amount of the second gel is injected into the sealing space, the air extraction and the glue injection are stopped.

[0010] Further, the outer film has a split surface, and the central axis of the second cylinder is parallel to the split surface or located on the split surface; the outer film is divided into two film body parts which can be detached from each other through the split surface; the method for sleeving the outer film on the outer side of the preset body layer comprises: sleeving the two film body parts on the outer side of the preset body layer, and connecting and fixing the two film body parts; and / or, the method for detaching the outer film from the fairing comprises: unlocking the two connected film body parts and detaching each film body part from the fairing.

[0011] Further, the inner film comprises a first cylinder and a protruding column arranged on the outer peripheral wall of the first cylinder, the protruding column and the first cylinder are detachably arranged; the inner peripheral wall of the second cylinder is provided with a groove part; the vacuum bag has a clearance hole not communicated with the inner cavity of the vacuum bag; and the method for wrapping the preset processing layer on the circumferential outer side of the inner film comprises: wrapping the preset processing layer on the circumferential outer side of the first cylinder, and sleeving the vacuum bag on the protruding column through the clearance hole, so that the preset body layer has a preset opening communicated with the cylinder cavity of the preset body layer; when the outer film is sleeved on the outer side of the preset body layer, the protruding column is located in the groove part, the protruding end face of the protruding column is in contact with the groove bottom wall of the groove part, and the preset gap is formed between the outer peripheral wall of the protruding column and the groove side wall of the groove part, so that the sealed space comprises a space body in a cylindrical shape and a preset gap communicated with the space body, and further the generated fairing comprises a cover body in a cylindrical structure and a connecting part arranged on the outer peripheral wall of the cover body, and the connecting part has a communication hole communicated with the preset opening.

[0012] Further, the groove part is provided with a protruding part on the groove bottom wall; the embedded part has oppositely arranged first and second ends; the embedded part has a connecting hole extending to the first end face of the embedded part; and the production method of the fairing further comprises: before the outer film is sleeved on the outer side of the preset body layer, the connecting hole of the embedded part is sleeved on the protruding part, and the first end face of the embedded part is in contact with the groove bottom wall of the groove part; after the second glue solidifies, the embedded part is fixed in the connecting part.

[0013] Further, the protruding part is a plurality of protruding parts, and the plurality of protruding parts are arranged at intervals along the circumferential direction of the groove bottom wall of the groove part; and the production method of the fairing further comprises: before the outer film is sleeved on the outer side of the preset body layer, the connecting holes of the plurality of embedded parts are correspondingly sleeved on the plurality of protruding parts, and the first end face of each embedded part is in contact with the groove bottom wall of the groove part.

[0014] Further, the connecting hole comprises a threaded hole section.

[0015] Further, the first cylinder comprises a first cylinder section, a second cylinder section, a third cylinder section, a fourth cylinder section and a fifth cylinder section connected in sequence along the axial direction thereof; the first cylinder has oppositely arranged first and second ends along the axial direction thereof; from the first end to the second end of the first cylinder, the cross section of the outer peripheral wall of the first cylinder perpendicular to the axial direction thereof is constant; the cross section of the outer peripheral wall of the second cylinder perpendicular to the axial direction thereof gradually increases, the cross section of the outer peripheral wall of the third cylinder perpendicular to the axial direction thereof gradually increases, the cross section of the outer peripheral wall of the fourth cylinder perpendicular to the axial direction thereof gradually increases, and the cross section of the outer peripheral wall of the fifth cylinder perpendicular to the axial direction thereof is constant.

[0016] Further, the second cylinder has oppositely arranged first and second ends along the axial direction thereof; from the first end to the second end of the second cylinder, the cross section of the inner peripheral wall of the second cylinder perpendicular to the axial direction thereof gradually increases.

[0017] Further, after the inner membrane and the outer membrane are detached from the flow deflector, the production method of the flow deflector further comprises: arranging an anti-static coating on the outer surface of the flow deflector.

[0018] Further, the resin material comprises epoxy vinyl resin, the material of the epoxy vinyl resin comprises bisphenol A; and / or the mass percentage of the resin material in the preset body layer ranges from 65% to 75%; and / or the mass percentage of the fiber cloth in the preset body layer ranges from 25% to 35%; and / or the fiber cloth is untwisted fiber; and / or the mass percentage of the resin material in the second glue ranges from 80% to 90%, and the mass percentage of the silicon carbide in the second glue ranges from 10% to 20%.

[0019] According to another aspect of the present application, a flow deflector is provided, which is generated by the production method of the flow deflector described above.

[0020] According to a third aspect of the present application, a mold assembly is provided, which comprises an inner membrane and an outer membrane, and both the inner membrane and the outer membrane are suitable for the production method of the flow deflector described above.

[0021] According to a fourth aspect of the present application, a mine submersible pump is provided, which comprises the flow deflector described above.

[0022] According to the technical solution of the present application, the production method of the flow deflector comprises: step S1: wrapping a preset processing layer on the circumferential outer side of the inner membrane in a cylindrical structure; wherein the preset processing layer comprises a vacuum bag and a fiber cloth arranged in the vacuum bag; step S2: injecting a first preset amount of a first glue into the vacuum bag, so that the fluid-like first glue penetrates into the fiber cloth and wraps the fiber cloth; the first glue comprises a resin material; step S3: after the first glue in the vacuum bag solidifies, the vacuum bag is removed; the fiber cloth and the solidified first glue combine to form a preset body layer; step S4: the outer membrane is sleeved on the outer side of the preset body layer; wherein the outer membrane comprises a second cylinder and two end covers, the two end covers are arranged at the axial two ends of the second cylinder respectively, and the axial two ends of the inner membrane abut against the two end covers respectively, so that the outer membrane and the inner membrane are relatively fixed; a sealed space in a cylindrical structure is formed between the inner circumferential wall of the second cylinder, the preset body layer and the two end covers; step S5: a second preset amount of a second glue is injected into the sealed space, so that the fluid-like second glue penetrates into the preset body layer and wraps the preset body layer; the second glue comprises a resin material and silicon carbide; step S6: after the second glue solidifies, the solidified second glue and the preset body layer combine to form a flow deflector; the inner membrane and the outer membrane are detached from the flow deflector.

[0023] Compared with the metal material or stainless steel material in the prior art, the material of the fairing generated by using the production method of the application includes fiber material, resin material and silicon carbide, so that the weight of the fairing is lighter; and the inner wall material of the fairing includes silicon carbide, so that the inner wall of the fairing has good wear resistance and corrosion resistance; and the overall structural strength of the fairing is higher. It can be seen that the fairing generated by using the production method of the application solves the problem of heavy weight of the fairing of the mine submersible pump in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein in conjunction with the description of the application. The drawings are as follows:

[0025] Figure 1 A structure schematic view of the fairing according to the application is shown;

[0026] Figure 2 A side view structure diagram of the fairing according to the application is shown;

[0027] Figure 3 A cross-sectional view of the fairing in A-A of Figure 2 is shown;

[0028] Figure 4 A cross-sectional view of the fairing in B-B of Figure 2 is shown;

[0029] Figure 5 A structure schematic view of the inner film of the mold assembly according to the application is shown;

[0030] Figure 6 A structure schematic view of the outer film of the mold assembly according to the application is shown;

[0031] Figure 7 A structure schematic view of the outer film of the mold assembly in Figure 6 after the two film body parts are detached is shown;

[0032] Figure 8 A right view of the left side film body part of the outer film of the mold assembly in Figure 7 is shown;

[0033] Figure 9 A structure schematic view of the two detached film body parts of the mold assembly according to the application being installed to the inner film is shown;

[0034] Figure 10 A structure schematic view of the outer film of the mold assembly according to the application being sleeved outside the inner film is shown;

[0035] Figure 11Fig. 2 shows a schematic view of the structure of the inner membrane of the mold assembly according to the present application, when the protrusions of the inner membrane are located in the recesses of the outer membrane.

[0036] In the drawings:

[0037] 10, inner membrane; 11, first cylinder; 111, first cylinder segment; 112, second cylinder segment; 113, third cylinder segment; 114, fourth cylinder segment; 115, fifth cylinder segment; 12, protrusion; 121, protruding end face; 122, first peripheral wall; 13, second locking member; 131, first setting end face;

[0038] 20, outer membrane; 21, second cylinder; 211, shell part; 22, end cover; 221, cover part; 23, membrane part; 231, locking part; 232, annular recess; 24, split surface; 25, sealing ring; 26, air extraction pipe; 27, glue injection pipe; 28, recess part; 281, groove side wall; 282, groove bottom wall; 29, protruding part;

[0039] 30, sealing space; 31, space body; 32, preset gap;

[0040] 200, fairing; 210, cover body; 220, connecting part; 230, communication hole; 201, first cover segment; 202, second cover segment; 203, third cover segment; 204, fourth cover segment; 205, fifth cover segment; 240, preset opening;

[0041] 300, pre-embedded part; 310, connecting hole. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0044] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0045] The present application provides a production method of a fairing, please refer to Figures 1 to 11The production method of the fairing includes the following steps:

[0046] Step S1: wrapping a preset processing layer on the circumferential outer side of the inner film 10 in a cylindrical structure; wherein the preset processing layer includes a vacuum bag and a fiber cloth arranged in the vacuum bag; the vacuum bag is provided with a first air outlet and a first glue injection port, both of which are in communication with the inner cavity of the vacuum bag.

[0047] Specifically, the fiber cloth is laid in the vacuum bag.

[0048] Step S2: injecting a first preset amount of first glue into the vacuum bag, so that the fluid-like first glue penetrates into the fiber cloth and wraps the fiber cloth; the first glue includes a resin material.

[0049] Specifically, the method of injecting a first preset amount of first glue into the vacuum bag includes: vacuumizing the inner cavity of the vacuum bag through the first air outlet, and injecting glue into the inner cavity of the vacuum bag through the first glue injection port, and the injected first glue can flow smoothly, so that the first glue can better penetrate into the fiber cloth and wrap the fiber cloth, that is, the first glue can completely soak the fiber cloth; stop vacuumizing and glue injection after injecting a first preset amount of first glue into the inner cavity of the vacuum bag; that is, a vacuum introduction process is adopted. Wherein, the inner cavity of the vacuum bag is a sealed cavity.

[0050] Specifically, the first air outlet is used to connect and communicate with the air outlet of the vacuum unit, so that the vacuum unit can vacuumize the inner cavity of the vacuum bag.

[0051] Specifically, the first glue injection port is used to communicate with the glue outlet of the glue injection equipment, so that the glue injection equipment can inject glue into the vacuum bag.

[0052] Step S3: after the first glue in the vacuum bag solidifies, remove the vacuum bag; the fiber cloth and the solidified first glue combine to form a preset body layer; the preset body layer is in a cylindrical structure.

[0053] Specifically, the method of removing the vacuum bag is to tear off the vacuum bag.

[0054] Step S4: the outer film 20 in a cylindrical structure is arranged on the outer side of the preset body layer; wherein the outer film 20 includes a second cylinder 21 and two end covers 22, the two end covers 22 are respectively arranged at the axial two ends of the second cylinder 21, and the axial two ends of the inner film 10 respectively abut against the two end covers 22, so that the outer film 20 and the inner film 10 are relatively fixed; the inner wall of the outer film 20, the outer peripheral wall of the preset body layer and the two end covers 22 form a sealed space 30 in a cylindrical structure; the outer film 20 includes a second air outlet and a second glue injection port, both of which are in communication with the sealed space 30.

[0055] Step S5: injecting a second preset amount of a second glue into the sealed space 30, so that the fluid second glue permeates into the preset body layer and the fluid second glue wraps the preset body layer; the second glue includes a resin material and silicon carbide.

[0056] Specifically, the method of injecting the second preset amount of the second glue into the sealed space 30 includes: performing air extraction on the sealed space 30 through the second air extraction port, and simultaneously performing glue injection into the sealed space 30 through the second glue injection port, and the injected glue is the second glue, so that the second glue injected into the sealed space 30 can flow smoothly, and then the second glue can better permeate into the preset body layer and wrap the preset body layer; when the second preset amount of the second glue is injected into the sealed space 30, the air extraction and the glue injection are stopped; that is, the vacuum introduction process is adopted.

[0057] Step S6: when the second glue is solidified, the solidified second glue and the preset body layer combine to form the fairing 200; and the inner membrane 10 and the outer membrane 20 are detached from the fairing 200.

[0058] It should be noted that when the outer membrane 20 is sleeved on the outer side of the preset body layer, the axial ends of the inner membrane 10 are respectively abutted with the two end covers 22, so that the second glue cannot enter between each end cover 22 and the axial end of the inner membrane 10, and then the axial ends of the formed fairing 200 are both open.

[0059] The fiber resin product is light and hard, stable in performance, high in mechanical strength, and corrosion resistant. Compared with the metal material or the stainless steel material in the prior art, the material of the fairing 200 generated by using the production method of the present application includes a fiber material, a resin material, and silicon carbide, so that the weight of the fairing 200 is relatively light; the inner wall of the fairing 200 includes silicon carbide, so that the inner wall of the fairing 200 has good wear resistance and corrosion resistance; and the overall structural strength of the fairing 200 is relatively high. It can be seen that the fairing 200 generated by using the production method of the present application solves the problem of the heavy weight of the fairing of the mine submersible pump in the prior art.

[0060] The use of the production method of the present application to produce the fairing of the mine submersible pump can reduce the total weight of the mine submersible pump by reducing the weight of the fairing.

[0061] It should be noted that the cylinder cavity of the fairing of the mine submersible pump is used for passing fluid, and the fluid passing through the cylinder cavity of the fairing will cause erosion and wear to the inner wall of the fairing, and the fluid passing through the cylinder cavity of the fairing is mine sewage; the inner wall of the fairing 200 of the present application has good wear resistance and corrosion resistance, which is beneficial to increasing the service life of the fairing 200.

[0062] It should be noted that the production method of the fairing of the present application adopts a fiber resin forming technology; the material of the fairing generated by the production method of the present application is a composite material.

[0063] In the present embodiment, the outer film 20 has a split surface 24; the central axis of the second cylinder 21 is parallel to the split surface 24, or the central axis of the second cylinder 21 is located on the split surface 24; the outer film 20 is divided into two mutually detachable film body parts 23 by the split surface 24.

[0064] Specifically, the split surface 24 divides the second cylinder 21 into two shell parts 211, and the split surface 24 divides each end cover 22 into two cover body parts 221; each film body part 23 includes one shell part 211, one cover body part 221 of one end cover 22, and one cover body part 221 of the other end cover 22; the two cover body parts 221 of each film body part 23 are respectively arranged at the two axial ends of the shell part 211.

[0065] Optionally, the film body part 23 is an integrally formed structure.

[0066] In the present embodiment, the method of sleeving the outer film 20 outside the preset body layer includes: sleeving the two film body parts 23 outside the preset body layer, and connecting and fixing the two film body parts 23.

[0067] In the present embodiment, the method of detaching the outer film 20 from the fairing 200 includes: unlocking the two connected film body parts 23 and detaching each film body part 23 from the fairing 200.

[0068] In the present embodiment, the first locking member is arranged to pass through the two film body parts 23 to lock and fix the two film body parts 23 to each other.

[0069] Specifically, each film body part 23 further includes a locking part 231 arranged on the shell part 211, and the first locking member is arranged to pass through the locking parts 231 of the two film body parts 23 to lock and fix the two film body parts 23 to each other.

[0070] Optionally, in each film body part 23, the locking part 231 is located outside the shell part 211.

[0071] Optionally, each film body part 23 includes a plurality of locking parts 231, and the plurality of locking parts 231 of one film body part 23 are arranged in one-to-one correspondence with the plurality of locking parts 231 of the other film body part 23; each first locking member passes through the corresponding locking parts 231 of one film body part 23 and the corresponding locking parts 231 of the other film body part 23.

[0072] Optionally, the plurality of locking parts 231 of each film body part 23 are arranged at intervals in the axial direction of the outer film 20.

[0073] Optionally, the first locking member is a bolt.

[0074] In the embodiment, a sealing ring 25 is arranged between the two membrane body portions 23 to ensure the sealing of the joint between the two membrane body portions 23.

[0075] Specifically, one of the membrane body portions 23 is provided with an annular groove 232, the central axis around which is perpendicular to the central axis of the outer membrane 20; at least part of the sealing ring 25 is arranged in the annular groove 232, and the central axis around which coincides with the central axis around which the annular groove 232 is arranged.

[0076] In the embodiment, the outer membrane 20 further comprises an air extraction pipe 26; a first pipe opening of the air extraction pipe 26 is located on the inner wall of the outer membrane 20, so that the first pipe opening of the air extraction pipe 26 communicates with the barrel cavity of the outer membrane 20, and then when the outer membrane 20 is sleeved on the outside of the preset body layer, the first pipe opening of the air extraction pipe 26 communicates with the sealing space 30; a second pipe opening of the air extraction pipe 26 is located on the outside of the outer membrane 20, so that the second pipe opening of the air extraction pipe 26 is used for connecting and communicating with the air extraction opening of the vacuum unit, and then the vacuum unit performs vacuumization on the sealing space 30. The second pipe opening of the air extraction pipe 26 is a second air extraction opening.

[0077] It should be noted that by locating the first pipe opening of the air extraction pipe 26 on the inner wall of the outer membrane 20, the first pipe opening of the air extraction pipe 26 is prevented from extending into the sealing space 30, and then a recess is avoided on the outer peripheral wall of the flow guide cover 200.

[0078] Specifically, the air extraction pipe 26 is arranged through the second barrel body 21; the first pipe opening of the air extraction pipe 26 is located on the inner peripheral wall of the second barrel body 21.

[0079] Optionally, the air extraction pipe 26 is a plurality of, and at least one air extraction pipe 26 is arranged through each shell portion 211.

[0080] In the embodiment, the outer membrane 20 further comprises a glue injection pipe 27; a first pipe opening of the glue injection pipe 27 is located on the inner wall of the outer membrane 20, so that the first pipe opening of the glue injection pipe 27 communicates with the barrel cavity of the outer membrane 20, and then when the outer membrane 20 is sleeved on the outside of the preset body layer, the first pipe opening of the glue injection pipe 27 communicates with the sealing space 30; a second pipe opening of the glue injection pipe 27 is located on the outside of the outer membrane 20, so that the second pipe opening of the air extraction pipe 26 is used for connecting with the glue outlet of the glue injection equipment, and then the glue injection equipment can inject glue into the sealing space 30. The second pipe opening of the glue injection pipe 27 is a second air extraction opening.

[0081] It should be noted that by locating the first pipe opening of the glue injection pipe 27 on the inner wall of the outer membrane 20, the first pipe opening of the glue injection pipe 27 is prevented from extending into the sealing space 30, and then a recess is avoided on the outer peripheral wall of the flow guide cover 200.

[0082] Specifically, the glue injection pipe 27 is arranged on one of the end covers 22, and a first pipe opening of the glue injection pipe 27 is located on an inner wall surface of the end cover 22, that is, a surface on which the first pipe opening of the glue injection pipe 27 is located is flush with the inner wall surface of the end cover 22.

[0083] Optionally, the glue injection pipe 27 is a plurality of glue injection pipes; for example, the plurality of glue injection pipes 27 are arranged on the same end cover 22.

[0084] In the embodiment, the inner film 10 includes the first cylinder 11 and the protruding column 12 arranged on an outer circumferential wall of the first cylinder 11, and the protruding column 12 and the first cylinder 11 are detachably arranged; the inner circumferential wall of the second cylinder 21 is provided with the groove portion 28.

[0085] The vacuum bag has a gap hole, and the gap hole is not communicated with an inner cavity of the vacuum bag. The method for wrapping the preset processing layer on the outer circumferential side of the inner film 10 includes: wrapping the preset processing layer on the outer circumferential side of the first cylinder 11, and allowing the vacuum bag to be sleeved on the protruding column 12 through the gap hole; in this way, the preset body layer formed later necessarily has the preset opening 240 communicated with a cylinder cavity of the preset body layer.

[0086] Before the preset processing layer is wrapped on the outer circumferential side of the inner film 10, the detached protruding column 12 and the first cylinder 11 need to be connected and assembled.

[0087] When the outer film 20 is sleeved on the outer side of the preset body layer, the protruding column 12 is located in the groove portion 28, the protruding end surface 121 of the protruding column 12 is in contact with a groove bottom wall of the groove portion 28, and a preset gap 32 is formed between the outer circumferential wall of the protruding column 12 and a groove side wall of the groove portion 28, so that the sealing space 30 includes the space body 31 in a cylinder shape and the preset gap 32 communicated with the space body 31, and further so that the generated fairing 200 includes the cover body 210 in a cylinder structure and the connecting portion 220 arranged on the outer circumferential wall of the cover body 210, and the connecting portion 220 has the communication hole 230 communicated with the preset opening 240. Figure 5 and Figure 11 the first outer circumferential wall 122 in the above is the outer circumferential wall of the protruding column 12; Figure 6 、 Figure 8 、 Figure 10 and Figure 11 the groove side wall 281 in the above is the groove side wall of the groove portion 28; Figure 6 the groove bottom wall 282 in the above is the groove bottom wall of the groove portion 28.

[0088] Specifically, the second glue body penetrating into the preset body layer and wrapping the preset body layer combines with the preset body layer to form the cover body 210; the solidified second glue body in the preset gap 32 forms the connecting part 220. Wherein, by making the protruding end surface 121 of the convex column 12 contact with the groove bottom wall of the groove part 28, the second glue body cannot enter between the protruding end surface 121 of the convex column 12 and the groove bottom wall of the groove part 28, and further, in the axial direction of the communication hole 230, the communication hole 230 penetrates to the end of the connecting part 220 away from the cover body 210.

[0089] Specifically, the preset gap 32 is an annular structure arranged around the hole center line of the communication hole 230 to form the communication hole 230 on the connecting part 220.

[0090] Specifically, in the axial direction of the communication hole 230, the end of the communication hole 230 close to the cover body 210 is in butt joint communication with the preset opening 240.

[0091] It should be noted that, when the outer film 20 is sleeved on the outside of the preset body layer, by making the axial ends of the inner film 10 abut against the two end covers 22 respectively, the second glue body cannot enter between each end cover 22 and the axial end of the inner film 10, and further, the axial two ends of the formed cover body 210 are both open.

[0092] Specifically, the second air outlet and the second glue inlet are both in communication with the space body 31, so that the second glue body injected into the space body 31 through the second glue inlet flows into the preset gap 32.

[0093] Specifically, the groove part 28 is arranged on one of the shell parts 211.

[0094] In the embodiment, the protruding part 29 is arranged on the groove bottom wall of the groove part 28; the embedded part 300 has oppositely arranged first end and second end; the embedded part 300 has the connecting hole 310; the axial direction of the connecting hole 310 is the same as the distribution direction of the first end and the second end of the embedded part 300; the connecting hole 310 has oppositely arranged first end and second end along its axial direction; the first end of the connecting hole 310 extends to the first end surface of the embedded part 300.

[0095] The production method of the flow guide cover further comprises: before the outer film 20 is sleeved on the outside of the preset body layer, the first end of the connecting hole 310 of the embedded part 300 is sleeved on the protruding part 29, and the first end surface of the embedded part 300 is in contact with the groove bottom wall of the groove part 28.

[0096] Specifically, after the second glue body is solidified, the embedded part 300 is fixed in the connecting part 220.

[0097] It should be noted that the connecting hole 310 of the embedded part 300 is sleeved on the protruding part 29, so that the embedded part 300 is clamped on the protruding part 29, and then the protruding part 29 plays a role of fixing and supporting the embedded part 300, thereby avoiding that the embedded part 300 moves under the impact of the second gel when the second gel is injected into the sealing space 30. By clamping the embedded part 300 on the protruding part 29, when the inner membrane 10 and the outer membrane 20 are to be detached from the fairing 200 after the fairing 200 is formed, the protruding part 29 is pulled out of the embedded part 300.

[0098] It should be noted that the first end surface of the embedded part 300 is in contact with the groove bottom wall of the groove part 28, so as to avoid the second gel flowing between the first end surface of the embedded part 300 and the groove bottom wall of the groove part 28, and then avoid the first end of the connecting hole 310 being blocked by the second gel.

[0099] Specifically, when the outer membrane 20 is sleeved on the outside of the preset body layer, the embedded part 300 is arranged in a spaced manner with the convex column 12.

[0100] Optionally, the connecting hole 310 comprises a threaded hole section. Preferably, the connecting hole 310 is a threaded hole section as a whole.

[0101] Optionally, the second end of the connecting hole 310 extends to the second end surface of the embedded part 300.

[0102] Optionally, when the second gel is solidified, the second end surface of the embedded part 300 is located between the inner peripheral wall and the outer peripheral wall of the cover body 210; or the second end surface of the embedded part 300 is located outside the outer peripheral wall of the cover body 210.

[0103] In the embodiment, the protruding part 29 is a plurality of protruding parts 29, and the plurality of protruding parts 29 are arranged in a spaced manner along the circumferential direction of the groove bottom wall of the groove part 28; the embedded part 300 is a plurality of embedded parts 300, and the plurality of embedded parts 300 are arranged in a one-to-one correspondence with the plurality of protruding parts 29. The production method of the fairing further comprises: before the outer membrane 20 is sleeved on the outside of the preset body layer, the connecting hole 310 of each of the plurality of embedded parts 300 is sleeved on the plurality of protruding parts 29 in a one-to-one correspondence, and the first end surface of each of the plurality of embedded parts 300 is in contact with the groove bottom wall of the groove part 28.

[0104] Specifically, when the second gel is solidified, the plurality of embedded parts 300 are fixed in the connecting part 220; and the plurality of embedded parts 300 are arranged in a spaced manner along the circumferential direction of the communication hole 230.

[0105] In the embodiment, the convex column 12 and the first cylinder 11 are locked and fixed by the second locking part 13, so that the convex column 12 and the first cylinder 11 are arranged in a detachable manner.

[0106] Specifically, the second locking member 13 is arranged on the convex column 12 and the first barrel 11 to lock and fix the convex column 12 and the first barrel 11.

[0107] Specifically, the second locking member 13 has a first end and a second end arranged oppositely along the arrangement direction of the second locking member 13; the convex end surface 121 of the convex column 12 is provided with a receiving groove; when the second locking member 13 is arranged on the convex column 12 and the first barrel 11, the second locking member 13 is arranged on the groove bottom wall of the receiving groove, and the second end of the second locking member 13 is arranged on the first barrel 11, and the first end of the second locking member 13 is accommodated in the receiving groove, so that the first end surface of the second locking member 13 is flush with the convex end surface 121, or the first end surface of the second locking member 13 is located on the side of the convex end surface 121 close to the groove bottom wall of the receiving groove, thereby avoiding that the first end surface of the second locking member 13 is located on the outside of the receiving groove, so as to avoid that the communication hole 230 is blocked by the second gel. Figure 5 The first arrangement end surface 131 in the second locking member 13 is the first end surface of the second locking member 13.

[0108] Optionally, the second locking member is a bolt.

[0109] In the embodiment, the first barrel 11 includes a first barrel segment 111, a second barrel segment 112, a third barrel segment 113, a fourth barrel segment 114 and a fifth barrel segment 115, which are arranged and connected in sequence along the axial direction of the first barrel 11; the first barrel 11 has a first end and a second end arranged oppositely along the axial direction thereof; from the first end to the second end of the first barrel 11, the cross section of the outer peripheral wall of the first barrel segment 111 perpendicular to the axial direction thereof is constant; the cross section of the outer peripheral wall of the second barrel segment 112 perpendicular to the axial direction thereof gradually increases, the cross section of the outer peripheral wall of the third barrel segment 113 perpendicular to the axial direction thereof gradually increases, the cross section of the outer peripheral wall of the fourth barrel segment 114 perpendicular to the axial direction thereof gradually increases, and the cross section of the outer peripheral wall of the fifth barrel segment 115 perpendicular to the axial direction thereof is constant; wherein the axial direction of the first barrel segment 111, the axial direction of the second barrel segment 112, the axial direction of the third barrel segment 113, the axial direction of the fourth barrel segment 114 and the axial direction of the fifth barrel segment 115 are the same as the axial direction of the first barrel 11.

[0110] Specifically, the outer peripheral wall of the first barrel segment 111 and the outer peripheral wall of the fifth barrel segment 115 are both cylindrical.

[0111] Specifically, the outer peripheral wall of the second barrel segment 112, the outer peripheral wall of the third barrel segment 113 and the outer peripheral wall of the fourth barrel segment 114 are all conical.

[0112] Specifically, the axial length of the third cylinder segment 113 is greater than the axial length of the first cylinder segment 111, and the axial length of the third cylinder segment 113 is greater than the axial length of the fifth cylinder segment 115; the axial length of the first cylinder segment 111 and the axial length of the fifth cylinder segment 115 are both greater than the axial length of the second cylinder segment 112; the axial length of the first cylinder segment 111 and the axial length of the fifth cylinder segment 115 are both greater than the axial length of the fourth cylinder segment 114.

[0113] Optionally, the second cylinder segment 112 and the fourth cylinder segment 114 are both transition cylinder segments.

[0114] Specifically, the convex column 12 is arranged on the outer peripheral wall of the third cylinder segment 113.

[0115] In the embodiment, the second cylinder body 21 has oppositely arranged first and second ends along its axial direction; the cross section of the inner peripheral wall of the second cylinder body 21 perpendicular to its axial direction gradually increases from the first end to the second end of the second cylinder body 21.

[0116] Specifically, the inner peripheral wall of the second cylinder body 21 is conical.

[0117] Further, for the remaining cylinder segments of the second cylinder body 21 except the cylinder segment where the groove part 28 is arranged, the cross section of the inner peripheral wall of the second cylinder body 21 perpendicular to its axial direction is circular.

[0118] Specifically, the glue injection pipe 27 is arranged through the end cover 22 at the first end of the second cylinder body 21; and the air extraction pipe 26 is arranged at the second end of the second cylinder body 21.

[0119] In the embodiment, after the inner membrane 10 and the outer membrane 20 are detached from the fairing 200, the production method of the fairing further comprises: arranging an antistatic coating on the outer side surface of the fairing 200.

[0120] Specifically, a rubber asphalt layer is attached to the outer side surface of the fairing 200 to perform antistatic treatment on the fairing 200, so that the fairing 200 has an antistatic coating.

[0121] Specifically, rubber asphalt is attached to the outer side surface of the fairing 200.

[0122] In the embodiment, the specific steps of detaching the inner membrane 10 and the outer membrane 20 from the fairing 200 are as follows: first, the two connected membrane body parts 23 are unlocked; then, the two membrane body parts 23 are detached from the fairing 200 respectively, and the convex part 29 is pulled out from the embedded part 300; then, the connected convex column 12 and the first cylinder body 11 are unlocked; then, the convex column 12 and the first cylinder body 11 are detached from the fairing 200 respectively; in this way, the demolding of the inner membrane 10 and the outer membrane 20 is relatively convenient and easy.

[0123] In the embodiment, the resin material comprises an epoxy vinyl resin, and the material of the epoxy vinyl resin comprises bisphenol A.

[0124] Optionally, the epoxy vinyl resin of the first colloid is a bisphenol A type epoxy vinyl resin S type resin.

[0125] Optionally, the epoxy vinyl resin of the second colloid is a bisphenol A type epoxy vinyl resin H type resin.

[0126] Specifically, the resin material further comprises a cobalt isooctanoate solution accelerated type accelerator and a methyl ethyl ketone peroxide polymerization initiator; wherein, in the resin material, the mass percentage of the accelerator is 1% to 3%, and the mass percentage of the initiator is 3% to 5%.

[0127] In the embodiment, the mass percentage of the resin material in the preset body layer is 65% to 75%; that is, the value range of the ratio of the mass of the resin material in the preset body layer to the total mass of the preset body layer is 65% to 75%.

[0128] In the embodiment, the mass percentage of the fiber cloth in the preset body layer is 25% to 35%; that is, the value range of the ratio of the mass of the fiber cloth to the total mass of the preset body layer is 25% to 35%.

[0129] In the embodiment, the fiber cloth is a twist-free fiber. Specifically, the fiber cloth is a high-strength basalt twist-free fiber.

[0130] In the embodiment, the mass percentage of the resin material in the second colloid is 80% to 90%, and the mass percentage of the silicon carbide in the second colloid is 10% to 20%; that is, the value range of the ratio of the mass of the resin material in the second colloid to the total mass of the second colloid is 80% to 90%, and the value range of the ratio of the mass of the silicon carbide in the second colloid to the total mass of the second colloid is 10% to 20%.

[0131] The weight reduction effect of the fairing 200 generated by the production method is obvious, and the mechanical performance of the fairing 200 meets the use requirements, and the wear resistance and anti-static meet the use requirements of the mine. Under the premise of meeting the use, the weight of the fairing 200 is reduced, so that the total weight of the mine submersible pump with the fairing 200 is also reduced, and then the mine submersible pump is convenient for the operator to carry when used in the mine.

[0132] The application also provides a mold assembly comprising an inner film 10 and an outer film 20, both of which are suitable for the production method of the fairing described above. Figure 5 The structure of the outer film 20 is shown in Figures 6 to 8 .

[0133] The application further provides a fairing 200 generated by the production method of the fairing. Figures 1 to 4

[0134] Specifically, the fairing 200 comprises a fairing body 210 and a connecting portion 220, the fairing body 210 is in a cylindrical structure, and both axial ends of the fairing body 210 are open; the connecting portion 220 is arranged on the outer peripheral wall of the fairing body 210; the connecting portion 220 is provided with a through hole 230, the through hole 230 has oppositely arranged first and second ends along the axial direction thereof; the second end of the through hole 230 is in communication with the cylindrical cavity of the fairing body 210, and the first end of the through hole 230 penetrates through the connecting portion 220.

[0135] In this embodiment, the fairing body 210 comprises a first fairing segment 201, a second fairing segment 202, a third fairing segment 203, a fourth fairing segment 204 and a fifth fairing segment 205, which are sequentially arranged and connected along the axial direction of the fairing body 210; along the axial direction of the fairing body 210, the fairing body 210 has oppositely arranged first and second ends; along the direction from the first end to the second end of the fairing body 210, the cross section of the inner peripheral wall of the first fairing segment 201 perpendicular to the axial direction thereof is constant; the cross section of the inner peripheral wall of the second fairing segment 202 perpendicular to the axial direction thereof gradually increases, the cross section of the inner peripheral wall of the third fairing segment 203 perpendicular to the axial direction thereof gradually increases, the cross section of the inner peripheral wall of the fourth fairing segment 204 perpendicular to the axial direction thereof gradually increases, and the cross section of the inner peripheral wall of the fifth fairing segment 205 perpendicular to the axial direction thereof is constant; wherein the axial direction of the first fairing segment 201, the axial direction of the second fairing segment 202, the axial direction of the third fairing segment 203, the axial direction of the fourth fairing segment 204 and the axial direction of the fifth fairing segment 205 are all the same as the axial direction of the fairing body 210.

[0136] Specifically, the inner peripheral wall of the first fairing segment 201 and the inner peripheral wall of the fifth fairing segment 205 are both cylindrical.

[0137] Specifically, the inner peripheral wall of the second fairing segment 202, the inner peripheral wall of the third fairing segment 203 and the inner peripheral wall of the fourth fairing segment 204 are all conical.

[0138] Specifically, the axial length of the third fairing segment 203 is greater than the axial length of the first fairing segment 201, and the axial length of the third fairing segment 203 is greater than the axial length of the fifth fairing segment 205; the axial length of the first fairing segment 201 and the axial length of the fifth fairing segment 205 are both greater than the axial length of the second fairing segment 202; the axial length of the first fairing segment 201 and the axial length of the fifth fairing segment 205 are both greater than the axial length of the fourth fairing segment 204.

[0139] Optionally, the second fairing segment 202 and the fourth fairing segment 204 are both transition fairing segments. ​

[0140] Specifically, the first cylinder segment 111, the second cylinder segment 112, the third cylinder segment 113, the fourth cylinder segment 114 and the fifth cylinder segment 115 are arranged in one-to-one correspondence with the first cover segment 201, the second cover segment 202, the third cover segment 203, the fourth cover segment 204 and the fifth cover segment 205 respectively, so that the outer peripheral wall of each cylinder segment is used to form the corresponding cover segment.

[0141] In the embodiment, the cross section of the outer peripheral wall of the cover body 210 perpendicular to the axial direction thereof gradually increases from the first end to the second end of the cover body 210.

[0142] Optionally, the outer peripheral wall of the cover body 210 is conical. Further, for the cover segments of the cover body 210 other than the cover segment provided with the connecting portion 220, the cross section of the outer peripheral wall of the cover body 210 perpendicular to the axial direction thereof is circular.

[0143] In the embodiment, the connecting portion 220 is fixedly provided with a pre-embedded part 300, the pre-embedded part 300 has a connecting hole 310, the axial direction of the connecting hole 310 is parallel to the axial direction of the communication hole 230; the first end of the connecting hole 310 penetrates the connecting portion 220, and the second end of the connecting hole 310 is not communicated with the cylinder cavity of the cover body 210. The flow guide cover 200 is used to stably connect with the external component through the connecting hole 310 to meet the mechanical strength requirement in use.

[0144] Optionally, the pre-embedded part 300 is a plurality of pre-embedded parts 300, and the plurality of pre-embedded parts 300 are arranged at intervals along the circumferential direction of the communication hole 230.

[0145] Optionally, the connecting hole 310 includes a threaded hole segment. Preferably, the connecting hole 310 is a threaded hole segment as a whole.

[0146] Optionally, the pre-embedded part 300 is a nut.

[0147] The application further provides a mine submersible pump comprising the above-mentioned flow guide cover 200.

[0148] Specifically, the mine submersible pump is a mine submersible electric pump.

[0149] Specifically, the mine submersible pump comprises a motor, the cover body 210 is sleeved on the outside of the motor, and an annular cavity is formed between the inner wall of the cover body 210 and the outer peripheral wall of the shell of the motor; along the axial direction of the flow guide cover 200, the annular cavity has oppositely arranged first and second ends; the direction from the first end to the second end of the cover body 210 is the same as the direction from the first end to the second end of the annular cavity; and due to the installation of the motor, the first end of the cover body 210 is sealed, that is, the first end of the annular cavity is sealed; at this time, the second end of the annular cavity is the water inlet, and the communication hole 230 is the water outlet.

[0150] Specifically, the inner wall of the cover body 210 meets the wear resistance and corrosion resistance requirements of the mine submersible pump for pumping mine sewage.

[0151] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0152] In the production method of the fairing provided by the present application, the production method comprises the following steps: step S1: wrapping a preset processing layer on the outer side of the inner film 10 in a cylindrical structure; wherein the preset processing layer comprises a vacuum bag and a fiber cloth arranged in the vacuum bag; step S2: injecting a first preset amount of a first colloid into the vacuum bag, so that the fluid-like first colloid penetrates into the fiber cloth and wraps the fiber cloth; the first colloid comprises a resin material; step S3: after the first colloid in the vacuum bag solidifies, the vacuum bag is removed; the fiber cloth and the solidified first colloid combine to form a preset body layer; step S4: the outer film 20 is sleeved on the outer side of the preset body layer; wherein the outer film 20 comprises a second cylinder 21 and two end covers 22, the two end covers 22 are arranged at the axial two ends of the second cylinder 21 respectively, and the axial two ends of the inner film 10 abut against the two end covers 22 respectively, so that the outer film 20 and the inner film 10 are relatively fixed; the inner circumferential wall of the second cylinder 21, the preset body layer and the two end covers 22 form a sealed space 30 in a cylindrical shape; step S5: a second preset amount of a second colloid is injected into the sealed space 30, so that the fluid-like second colloid penetrates into the preset body layer and wraps the preset body layer; the second colloid comprises a resin material and silicon carbide; step S6: after the second colloid solidifies, the solidified second colloid and the preset body layer combine to form the fairing 200; the inner film 10 and the outer film 20 are detached from the fairing 200.

[0153] Compared with the metal material or stainless steel material in the prior art, the material of the fairing 200 generated by using the production method of the present application comprises a fiber material, a resin material and silicon carbide, so that the weight of the fairing 200 is lighter; and the inner wall material of the fairing 200 comprises silicon carbide, so that the inner wall of the fairing 200 has good wear resistance and corrosion resistance; and the overall structural strength of the fairing 200 is higher. It can be seen that the fairing 200 generated by using the production method of the present application solves the problem of heavy weight of the fairing of the mine submersible pump in the prior art.

[0154] The present application utilizes a mold assembly, according to the different properties of fiber and resin, through layered manufacturing, a light fairing is made, which greatly reduces the weight of the fairing, and the light fairing made can meet various performance requirements.

[0155] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0156] Spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) 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 described is turned over in use, a downwardly position element or feature can then be oriented upwardly. Thus, the example term "below" can encompass both an orientation of below and above. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. can be used herein to describe various elements, regions, layers and / or sections but are not intended to be used to designate a particular order or sequence unless otherwise specifically indicated.

[0157] The specific embodiments of the present application have been described above for the purpose of clarity and are not intended to be limiting of the application. Any modifications of the application, which come within the spirit and scope of the application, are intended to be included.

Claims

1. A method of producing a fairing, characterized by, The application relates to a method for manufacturing a fairing. Step S1: wrapping a preset processing layer on the circumferential outer side of an inner film (10) in a cylindrical structure; wherein the preset processing layer comprises a vacuum bag and a fiber cloth arranged in the vacuum bag; Step S2: injecting a first preset amount of a first glue into the vacuum bag, so that the fluid-like first glue penetrates into the fiber cloth and wraps the fiber cloth; the first glue comprises a resin material; Step S3: after the first glue in the vacuum bag is solidified, the vacuum bag is removed; the fiber cloth and the solidified first glue are combined to form a preset body layer; Step S4: sleeving an outer film (20) on the outer side of the preset body layer; wherein the outer film (20) comprises a second cylinder (21) and two end covers (22), the two end covers (22) are arranged at the axial two ends of the second cylinder (21) respectively, and the axial two ends of the inner film (10) abut against the two end covers (22) respectively, so that the outer film (20) and the inner film (10) are relatively fixed; a sealing space (30) in a cylindrical shape is formed between the inner circumferential wall of the second cylinder (21), the preset body layer and the two end covers (22); Step S5: injecting a second preset amount of a second glue into the sealing space (30), so that the fluid-like second glue penetrates into the preset body layer and wraps the preset body layer; the second glue comprises a resin material and silicon carbide; Step S6: after the second glue is solidified, the solidified second glue and the preset body layer are combined to form the fairing; the inner film (10) and the outer film (20) are detached from the fairing.

2. The method of producing a fairing according to claim 1, characterized by, The vacuum bag is provided with a first air outlet and a first glue injection port, and the first air outlet and the first glue injection port are in communication with the inner cavity of the vacuum bag; the method for injecting the first preset amount of the first glue into the vacuum bag comprises the following steps: air in the inner cavity of the vacuum bag through the first air outlet, and glue is injected into the inner cavity of the vacuum bag through the first glue injection port; after the first preset amount of the first glue is injected into the inner cavity of the vacuum bag, air injection and glue injection are stopped.

3. The method of producing a boss according to claim 1, wherein The outer film (20) comprises a second air outlet and a second glue injection port, and the second air outlet and the second glue injection port are in communication with the sealing space (30); the method for injecting the second preset amount of the second glue into the sealing space (30) comprises the following steps: air in the sealing space (30) through the second air outlet, and glue is injected into the sealing space (30) through the second glue injection port; after the second preset amount of the second glue is injected into the sealing space (30), air injection and glue injection are stopped.

4. The method of producing a boss according to claim 1, wherein The outer film (20) has a split surface (24), the central axis of the second cylinder (21) is parallel to the split surface (24) or located on the split surface (24); and the outer film (20) is divided into two film body parts (23) which can be detached from each other through the split surface (24). The method for sleeving the outer film (20) on the outside of the preset body layer comprises: sleeving both of the film body parts (23) on the outside of the preset body layer, and connecting and fixing both of the film body parts (23); and / or The method for dismounting the outer film (20) from the flow guide cover comprises: unlocking both of the connected film body parts (23) and dismounting each of the film body parts (23) from the flow guide cover.

5. The method of producing a fairing according to claim 1 or 4, characterized by, The inner film (10) comprises a first cylinder (11) and a convex column (12) arranged on the outer circumferential wall of the first cylinder (11), and the convex column (12) and the first cylinder (11) are detachably arranged; the inner circumferential wall of the second cylinder (21) is provided with a groove part (28); The vacuum bag has a gap hole not communicated with the inner cavity of the vacuum bag, and the method for wrapping the preset processing layer on the circumferential outside of the inner film (10) comprises: wrapping the preset processing layer on the circumferential outside of the first cylinder (11), and sleeving the vacuum bag on the convex column (12) through the gap hole, so that the preset body layer has a preset opening (240) communicated with the cylinder cavity of the preset body layer; When the outer film (20) is sleeved on the outside of the preset body layer, the convex column (12) is located in the groove part (28), the convex end surface (121) of the convex column (12) is in contact with the groove bottom wall of the groove part (28), and there is a preset gap (32) between the outer circumferential wall of the convex column (12) and the groove side wall of the groove part (28), so that the sealing space (30) comprises a space body (31) in a cylinder shape and the preset gap (32) communicated with the space body (31), and further so that the generated flow guide cover comprises a cover body (210) in a cylinder structure and a connecting part (220) arranged on the outer circumferential wall of the cover body (210), and the connecting part (220) has a communication hole (230) communicated with the preset opening (240).

6. The method of producing a boss according to claim 5, wherein The groove bottom wall of the groove part (28) is provided with a convex part (29); the embedded part (300) has oppositely arranged first and second ends; the embedded part (300) has a connecting hole (310) extending to the first end surface of the embedded part (300); and the production method of the flow guide cover further comprises: Before sleeving the outer film (20) on the outside of the preset body layer, the connecting hole (310) of the embedded part (300) is sleeved on the convex part (29), and the first end surface of the embedded part (300) is in contact with the groove bottom wall of the groove part (28); After the second gel is solidified, the embedded part (300) is fixed in the connecting part (220).

7. The method of producing a fairing according to claim 6, wherein The convex parts (29) are multiple, and the multiple convex parts (29) are arranged in a circumferential direction of the groove bottom wall of the groove part (28); the production method of the flow guide cover further comprises: before the outer film (20) is sleeved outside the preset body layer, the connecting holes (310) of the multiple embedded parts (300) are correspondingly sleeved on the multiple convex parts (29), and the first end surface of each embedded part (300) is in contact with the groove bottom wall of the groove part (28).

8. The method of producing a boss according to claim 1, wherein After the inner film (10) and the outer film (20) are detached from the flow guide cover, the production method of the flow guide cover further comprises: An antistatic coating is arranged on the outer surface of the flow guide cover.

9. The production method of the flow guide cover according to claim 1, wherein The resin material comprises an epoxy vinyl resin, and the material of the epoxy vinyl resin comprises bisphenol A; and / or The mass percentage of the resin material in the preset body layer is 65% to 75%; and / or The mass percentage of the fiber cloth in the preset body layer is 25% to 35%; and / or The fiber cloth is untwisted fiber; and / or The mass percentage of the resin material in the second colloid is 80% to 90%, and the mass percentage of the silicon carbide in the second colloid is 10% to 20%.

10. A fairing characterized by, The flow guide cover is generated by the production method of the flow guide cover according to any one of claims 1 to 9.

11. The fairing of claim 10, wherein, The connecting hole (310) of the embedded part (300) on the flow guide cover comprises a threaded hole section.

12. A mold assembly characterized by, The inner film (10) and the outer film (20) are suitable for the production method of the flow guide cover according to any one of claims 1 to 9.

13. The mold assembly of claim 12, wherein, The first cylinder body (11) of the inner film (10) comprises a first cylinder section (111), a second cylinder section (112), a third cylinder section (113), a fourth cylinder section (114) and a fifth cylinder section (115) connected in sequence along the axial direction thereof; the first cylinder body (11) has a first end and a second end arranged oppositely along the axial direction thereof; from the first end to the second end of the first cylinder body (11), the cross section of the outer peripheral wall of the first cylinder section (111) perpendicular to the axial direction thereof is constant; the cross section of the outer peripheral wall of the second cylinder section (112) perpendicular to the axial direction thereof gradually increases, the cross section of the outer peripheral wall of the third cylinder section (113) perpendicular to the axial direction thereof gradually increases, the cross section of the outer peripheral wall of the fourth cylinder section (114) perpendicular to the axial direction thereof gradually increases, and the cross section of the outer peripheral wall of the fifth cylinder section (115) perpendicular to the axial direction thereof is constant.

14. The mold assembly of claim 12, wherein, The second cylinder body (21) of the outer film (20) has a first end and a second end arranged oppositely along the axial direction thereof; from the first end to the second end of the second cylinder body (21), the cross section of the inner peripheral wall of the second cylinder body (21) perpendicular to the axial direction thereof gradually increases.

15. A mine submersible pump characterized by, The flow guide cover according to claim 10 or 11.

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