Heat insulation plate for shield pump, production process of heat insulation plate and shield pump unit

Abstract

The invention discloses a heat insulation plate for a shield pump, a production process of the heat insulation plate and a shield pump unit, and belongs to the field of shield pumps. The shield pump unit comprises a control box, a pump body and a heat insulation plate, the heat insulation plate is installed between a box base bottom plate of the control box and a machine shell of the pump body, a grounding elastic piece is integrally formed in the heat insulation plate in an injection molding mode, the grounding elastic piece is provided with a first connecting end and a second connecting end, and a first grounding fastener penetrates out of the first connecting end and is connected with the machine shell in a fastening mode. The second grounding fastener penetrates out of the box base bottom plate and is connected with the second connecting end in a fastening mode. Grounding protection and the heat insulation plate are integrally designed, on the basis that the heat insulation plate is used for blocking heat transfer, grounding protection of the pump unit is achieved, electricity is guided into the ground, and electric leakage of a machine shell is prevented; and the sealing performance of the control box is improved, and external air is prevented from entering the control box, so that condensed water is prevented from being generated, and long-term safe application of the control box is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of pump units, and more specifically, to a heat insulation plate for a canned motor pump, its production process, and a canned motor pump unit. Background Art

[0002] In a cold and hot water circulation system, a canned motor pump plays a very important role as a power device. A pump unit generally includes a pump body, a motor for driving an impeller assembly in the pump body, and a control box provided on the pump body. The control box has a controller inside for controlling the operation of the motor, and thus controlling the operation of the entire pump unit. To achieve the dual-purpose scenario of cold and warm use of the canned motor pump, not only the problem of grounding protection needs to be satisfied, but also the generation of condensed water in the control box needs to be effectively prevented.

[0003] In practice, it is commonly necessary to electrically conduct the grounding wire in the control box with the motor housing made of metal material to achieve grounding protection, which easily leads to the connection between the inner cavity of the control box and the outside. When the canned motor pump conveys cold water medium, the temperature is lower than the ambient temperature, which may cause condensed water to easily generate in the control box and even lead to motor burnout. Effectively avoiding the generation of condensed water is crucial for improving the long-term application safety of the control box.

[0004] After retrieval, the patent with the publication number CN217107466U discloses a canned motor pump. Aiming at the problem that water droplets are likely to condense on the outer side of the shielding sleeve and cause the motor to burn out, the grounding housing and the stator assembly are plastic-sealed in a plastic-sealing housing, with no metal parts exposed, avoiding the condensation of water droplets on the side of the shielding sleeve facing the stator assembly, and greatly reducing the occurrence of motor burnout; and the grounding connection is realized by using the grounding housing to improve safety. However, this design structure is relatively complex and it is also difficult to be applicable to various pump body structures, and its application has certain limitations. Summary of the Invention

[0005] 1. Technical Problems to be Solved by the Invention

[0006] Aiming at the situation that condensed water is likely to generate in the control box of the canned motor pump in the prior art, leading to safety risks, the present invention intends to provide a heat insulation plate for a canned motor pump, its production process, and a canned motor pump unit. By adopting the heat insulation plate structure of the present invention, while achieving grounding protection, it can effectively avoid the generation of condensed water in the control box and improve the use safety of the pump body.

[0007] 2. Technical Solutions

[0008] To achieve the above object, the technical solutions provided by the present invention are as follows:

[0009] A heat insulation plate for a canned motor pump of the present invention is configured to be installed between the base plate of the box seat of the control box and the housing of the pump body to block the heat transfer between the pump body and the control box.

[0010] An earthing spring piece is integrally injection-molded inside the heat insulation plate. The earthing spring piece has a first connection end and a second connection end. A housing mounting position is provided in the area of the heat insulation plate corresponding to the first connection end. The housing mounting position is used for mating connection with the housing of the pump body, so that the first connection end can be electrically connected to the housing. The area of the heat insulation plate corresponding to the second connection end has a box seat mounting position. The box seat mounting position is used for mating connection with the box seat bottom plate of the control box, so that the second connection end can be electrically connected to the control box.

[0011] Furthermore, a housing mounting hole penetrating the thickness is formed in the area of the heat insulation plate corresponding to the first connection end. The first connection end extends into the housing mounting hole, and a first connection hole corresponding to the position of the housing mounting hole is provided. The housing mounting hole and the first connection hole cooperate for the first earthing fastener to pass through and then connect to the housing.

[0012] Furthermore, an earthing insert is provided on the second connection end. A second connection hole is formed in the earthing insert. The second connection hole extends upward to communicate with the surface of the heat insulation plate, and is used for the second earthing fastener to pass through the box seat bottom plate and then cooperate and fasten with the second connection hole.

[0013] Furthermore, a box seat mounting post is formed in the area of the heat insulation plate corresponding to the second connection end. The earthing insert extends correspondingly inside the box seat mounting post, and a sealing member is circumferentially provided around the top of the earthing insert inside the box seat mounting post.

[0014] The present invention also provides a canned motor pump unit, including a control box, a pump body and a heat insulation plate. The heat insulation plate is installed between the box seat bottom plate of the control box and the housing of the pump body. The above-mentioned heat insulation plate is adopted. The first earthing fastener passes through the first connection end and is fixedly connected to the housing. The second earthing fastener passes through the box seat bottom plate and is fixedly connected to the second connection end.

[0015] Furthermore, the inner cavity of the first earthing fastener and the housing are not communicated with each other. After the second earthing fastener passes through the box seat bottom plate, a sealing member is provided around the periphery of the second earthing fastener between the box seat bottom plate and the heat insulation plate for sealing.

[0016] Furthermore, an earthing mounting post is provided in the area of the housing corresponding to the first connection end. A threaded hole is provided in the earthing mounting post, and the threaded hole is a blind hole. The first earthing fastener passes through the first connection end and is threadedly mated and fastened with the earthing mounting post.

[0017] Furthermore, an earthing insert is provided on the second connection end. A second connection hole is formed in the earthing insert. A heat insulation mounting hole penetrating the thickness is provided in the area of the box seat bottom plate corresponding to the second connection hole. The second earthing fastener passes through the heat insulation mounting hole and the box seat bottom plate and then is threadedly mated and fastened with the second connection hole.

[0018] Furthermore, a socket mounting post is formed in the area of the heat insulation plate corresponding to the second connection end. The grounding insert extends correspondingly within the socket mounting post, and a seal is circumferentially provided around the top of the grounding insert within the socket mounting post; an outwardly protruding mounting flange is circumferentially provided around the edge of the heat insulation mounting hole on the socket bottom plate, and the mounting flange is cooperatively pressed against the seal.

[0019] Furthermore, the grounding spring piece includes a spring piece body, and the two ends of the spring piece body are respectively a first connection end and a second connection end; both the first connection end and the second connection end horizontally extend inside the heat insulation plate, and the horizontal heights of the first connection end and the second connection end are different.

[0020] Furthermore, the grounding insert is riveted on the second connection end and integrally injection-molded with the heat insulation plate together, and a recessed portion is circumferentially provided around the middle of the outer wall of the grounding insert.

[0021] Furthermore, a wire outlet transfer assembly is also integrally injection-molded on the heat insulation plate, and the two ends of the wire outlet transfer assembly respectively extend to the upper and lower sides of the heat insulation plate; one end of the wire outlet transfer assembly penetrates into the control box and is electrically connected to the circuit board, and the other end penetrates into the machine shell and is electrically connected to the stator assembly. Seals are respectively provided around the outer circumferences of the wire outlet transfer assembly on the upper and lower side surfaces of the heat insulation plate, and a circumferential outwardly protruding flange is respectively provided on the socket bottom plate and the machine shell corresponding to the installation area of the wire outlet transfer assembly to press the seals for sealing.

[0022] The present invention also provides a production process for the heat insulation plate of a canned motor pump. Using the heat insulation plate as described above, the grounding spring piece is placed in the injection mold for positioning and then injection molding is started, so that the grounding spring piece is integrally formed and hidden inside the heat insulation plate, and the first connection end and the second connection end of the grounding spring piece can respectively communicate with the outside for installation and fastening.

[0023] Furthermore, the heat insulation plate also has a wire outlet transfer assembly. During processing, the wire outlet transfer element is first placed in the injection mold for positioning and the first injection molding is carried out, and a housing is formed by injection molding around the outer circumference of the wire outlet transfer element to form the wire outlet transfer assembly; then the wire outlet transfer assembly and the grounding spring piece are jointly placed in the injection mold for positioning, and then the second injection molding is started, so that the wire outlet transfer assembly and the grounding spring piece are integrally formed inside the heat insulation plate.

[0024] 3. Beneficial effects

[0025] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0026] For the canned motor pump unit of the present invention, the grounding protection and the heat insulation plate are integrally designed. On the basis of using the heat insulation plate to block heat transfer, a grounding spring piece is integrally injection-molded in the heat insulation plate, and both ends of the grounding spring piece are respectively connected to the control box and the casing by metal fasteners, so that the control box and the casing can be metallically conducted to achieve the grounding protection of the pump unit, conduct electricity into the ground, prevent the casing from leaking electricity, and the grounding position can be freely selected, with strong applicability and flexibility. The grounding spring piece is hidden, with stronger protection and guaranteed grounding reliability. Secondly, a seal is provided between the connection position of the heat insulation plate and the control box for sealing. When the heat insulation plate is installed with the casing, it does not communicate with the inner cavity of the casing, so as to effectively ensure the sealing of the control box, prevent external air from entering the control box, and thus avoid the generation of condensate water, ensuring the long-term safe application of the control box. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the pump unit in the embodiment;

[0028] Figure 2 It is a schematic structural diagram of the pump unit in the embodiment from the bottom view perspective;

[0029] Figure 3 It is a schematic cross-sectional structural diagram of the pump unit in the embodiment;

[0030] Figure 4 For Figure 3 It is a partial enlarged structural diagram at A in

[0031] Figure 5 For Figure 4 It is a partial enlarged structural diagram at B in

[0032] Figure 6 It is a schematic structural diagram of the heat insulation plate in the embodiment;

[0033] Figure 7 It is a schematic cross-sectional structural diagram of the heat insulation plate in the embodiment;

[0034] Figure 8 It is a schematic structural diagram of the bottom of the control box in the embodiment from the bottom view perspective;

[0035] Figure 9 It is a schematic structural diagram of the motor casing in the embodiment;

[0036] Figure 10 It is a schematic structural diagram of the grounding spring piece in the embodiment;

[0037] Figure 11 It is a schematic cross-sectional structural diagram of the grounding spring piece in the embodiment.

[0038] Explanation of the reference numerals in the schematic diagram:

[0039] 100, Control box; 110, Box base plate; 111, Heat insulation mounting surface; 112, Mounting flange; 113, Second grounding fastener;

[0040] 200, Pump body; 210, Housing; 211, Grounding mounting post; 212, Housing mounting post; 213, Adapter flange; 214, First grounding fastener;

[0041] 300, Heat insulation plate; 301, Seal; 302, Cable outlet adapter assembly; 310, Plate body; 311, Box base mounting post; 312, Housing mounting hole;

[0042] 400, Grounding spring piece; 401, Spring piece body; 402, First connection end; 403, First connection hole; 404, Bending part; 405, Second connection end; 410, Grounding insert; 411, Second connection hole; 412, Depressed part. Detailed implementation mode

[0043] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] The present invention will be further described below in conjunction with embodiments.

[0046] Embodiment

[0047] Combined with Figures 1 - 11 As shown, a canned motor pump unit provided in this embodiment includes a control box 100, a pump body 200 and a heat insulation plate 300. The heat insulation plate 300 is installed between the box base plate 110 of the control box 100 and the housing 210 of the pump body 200. Among them, a controller circuit board is installed in the control box 100. The box body of the control box 100 and the housing 210 of the pump body 200 are both made of metal materials to enable metal electrical conduction, and the heat insulation plate 300 is integrally injection molded with injection plastic. Setting the heat insulation plate 300 between the box base plate 110 and the housing 210 can effectively block the heat transfer between the pump body 200 and the control box 100, thereby preventing the control box 100 from being affected by high temperature and ensuring the operation safety of the control box 100.

[0048] In this embodiment, the ground protection is integrally designed with the heat insulation plate 300. Specifically, the heat insulation plate 300 includes a plate body 310, and a ground contact spring piece 400 is integrally injection-molded in the plate body 310. Specifically, it is a thin metal spring piece. The ground contact spring piece 400 has a first connection end 402 and a second connection end 405. An enclosure mounting position is provided in the area of the plate body 310 corresponding to the first connection end 402. The enclosure mounting position is used to cooperate and connect with the enclosure 210 of the pump body 200, so that the first connection end 402 can be electrically connected to the enclosure 210. An enclosure base mounting position is provided in the area of the plate body 310 corresponding to the second connection end 405. The enclosure base mounting position is used to cooperate and connect with the enclosure base plate 110 of the control box 100, so that the second connection end 405 can be electrically connected to the control box 100.

[0049] Specifically, when installing the heat insulation plate 300, the first ground fastener 214 passes through the first connection end 402 and is tightly connected to the enclosure 210. The second ground fastener 113 passes through the enclosure base plate 110 and is tightly connected to the second connection end 405. Both the first ground fastener 214 and the second ground fastener 113 are connection fasteners made of metal. The first ground fastener 214 is in close contact with the first connection end 402 and between the first ground fastener 214 and the enclosure 210 to achieve electrical conduction. The second ground fastener 113 is in close contact with the enclosure base plate 110 and between the second ground fastener 113 and the second connection end 405 to achieve electrical conduction. In the practice of this embodiment, the ground wire of the controller circuit board in the control box 100 first contacts the box body of the control box 100 made of metal to achieve electrical conduction. Specifically, it is embedded in the box body of the control box 100 in the form of a metal spring piece, that is, the ground wire is conducted to the control box 100 made of metal, and then through the enclosure base plate 110 made of metal, the second ground fastener 113, the second connection end 405, the ground contact spring piece 400, the first connection end 402, the first ground fastener 214 and the enclosure 210 in sequence to achieve electrical conduction, so as to realize the ground protection of the pump unit, conduct the electricity to the ground, and prevent the enclosure 210 from leaking electricity. In this way, there are no strict restrictions on the grounding position of the controller circuit board in the control box 100, and the grounding position can be freely selected, with strong applicability and flexibility, and very convenient to use.

[0050] In this embodiment, the grounding spring piece 400 is integrally formed and hidden inside the heat insulation plate 300. The structure is simple, the position is stable, and the protection is good, which can ensure the reliability of effective grounding. Moreover, the heat insulation plate 300 is an injection molded part, which effectively blocks the heat transfer. Therefore, it can be tightly installed on both sides with the chassis 210 and the base plate 110 of the box seat respectively, that is, the heat insulation plate 300 is pressed on the base plate 110 of the box seat. Specifically, the outer side of the base plate 110 of the box seat has a heat insulation installation surface 111, and the heat insulation plate 300 is fitted and installed on the heat insulation installation surface 111. Although the second grounding fastener 113 passes through the base plate 110 of the box seat, it does not penetrate through the heat insulation plate 300, but is connected to the grounding spring piece 400 hidden inside the heat insulation plate 300. The chassis 210 is not directly connected to the inside of the control box 100 either, but is connected to the grounding spring piece 400 hidden inside the heat insulation plate 300 by using the first grounding fastener 214. Compared with the traditional technology, it is beneficial to reduce the large amount of external air entering the control box 100, thereby alleviating the problem of condensed water and ensuring the application safety of the control box 100.

[0051] To further improve the safety of the control box 100, a more optimized design is that the first grounding fastener 214 is not connected to the inner cavity of the chassis 210, that is, the inner cavity of the chassis 210 is prevented from communicating with the outside. After the second grounding fastener 113 passes through the base plate 110 of the box seat, a seal 301 is provided around the second grounding fastener 113 between the base plate 110 of the box seat and the heat insulation plate 300 for sealing, so as to further improve the sealing performance of the control box 100 with the outside, especially to prevent air from entering the control box 100 from the area where the second grounding fastener 113 passes through.

[0052] As one of the implementable setting methods for the chassis installation position in practice, in combination with Figures 4 - 7 As shown, a chassis installation hole 312 penetrating the thickness is formed in the area of the heat insulation plate 300 corresponding to the first connection end 402. The first connection end 402 extends into the chassis installation hole 312 and is provided with a first connection hole 403 corresponding to the position of the chassis installation hole 312. The chassis installation hole 312 and the first connection hole 403 cooperate for the first grounding fastener 214 to pass through and then connect with the chassis 210. Preferably, the aperture of the chassis installation hole 312 is significantly larger than the aperture of the first connection hole 403, so that the first connection end 402 and the first connection hole 403 can be basically completely exposed in the chassis installation hole 312, avoiding the generation of flash around the first connection hole 403 during the injection molding process, which affects the grounding reliability. More specifically, the first grounding fastener 214 can adopt a fastening bolt. A grounding installation post 211 is provided in the area of the chassis 210 corresponding to the first connection end 402. A threaded hole is provided in the grounding installation post 211. The first grounding fastener 214 penetrates the heat insulation plate 300 from top to bottom and is threadedly fitted and fastened with the grounding installation post 211. The first grounding fastener 214 presses the first connection end 402 between it and the chassis 210 to achieve electrical conduction.

[0053] As one of the feasible settings for the cassette holder installation position in practice, combined with Figures 4 - 7 As shown, a grounding insert 410 made of metal is provided on the second connection end 405, and a second connection hole 411 is provided in the grounding insert 410. The second connection hole 411 extends upward to the surface of the heat insulation board 300, and is used for the second grounding fastener 113 to pass through the bottom plate 110 of the box seat and then be fastened with the second connection hole 411. More specifically, the second grounding fastener 113 can be a fastening bolt, and the second connection hole 411 is a threaded hole. A heat insulation installation hole that penetrates the thickness is provided on the bottom plate 110 of the box seat in an area corresponding to the second connection hole 411. The second grounding fastener 113 passes through the bottom plate 110 of the box seat from the heat insulation installation hole and then is fastened with the second connection hole 411 by threading. In this way, the fastening bolts press the box base bottom plate 110 and then press the grounding insert 410 downward, realizing the metal electrical conduction relationship between the box base bottom plate 110 and the second grounding fastener 113, between the second grounding fastener 113 and the grounding insert 410, and between the grounding insert 410 and the grounding spring 400, thereby meeting the grounding requirements.

[0054] Furthermore, if Figure 10 As shown, during processing, the grounding insert 410 is pre-riveted on the second connection end 405, and then the entire grounding spring piece 400 is integrally injection-molded with the heat insulation board 300, and a circle of recessed portion 412 is circumferentially arranged in the middle of the outer wall of the grounding insert 410, so that it is convenient to effectively position the thin sheet-like grounding spring piece 400 before injection molding, and a circle of injection molding material is also formed on the outer side of the recessed portion 412 after injection molding, so as to ensure the position accuracy and stability of the entire grounding spring piece 400 including the grounding insert 410, so as to ensure the subsequent installation and matching tightness with the second grounding fastener 113, and ensure that it can be smoothly pressed.

[0055] Combination Figure 6 and Figure 7 As shown, in practice, it can be further optimized, the area corresponding to the second connection end 405 on the heat insulation board 300 is formed with a box seat mounting column 311, the grounding insert 410 extends in the box seat mounting column 311, and a sealing member 301 is provided in the box seat mounting column 311 around the top of the grounding insert 410. Correspondingly, in combination Figure 5 and Figure 8As shown, an outwardly protruding mounting flange 112 is provided around the edge of the heat-insulating mounting hole on the bottom plate 110 of the box seat. The mounting flange 112 is fitted and pressed tightly on the seal 301. In this way, after the second grounding fastener 113 passes downward through the heat-insulating mounting hole of the box seat bottom plate 110 from inside the control box 100, it is threadedly fastened and pressed tightly with the grounding insert 410, and the mounting flange 112 is correspondingly pressed downward on the seal 301, which can effectively seal the periphery of the heat-insulating mounting hole of the box seat bottom plate 110 to avoid contact with the outside air, thereby effectively preventing air from entering and causing condensation. In practice, the heat-insulating plate 300 is integrally formed by injection molding. The seal 301 can specifically be made of injection-molded soft rubber. After the hard rubber is injection-molded, soft rubber is further injection-molded for sealing. Combined with Figure 6 As shown, to achieve the stable installation of the heat-insulating plate 300 and the box seat bottom plate 110, four groups of box seat mounting posts 311 can be provided on the heat-insulating plate 300. One group of box seat mounting posts 311 is internally fitted with a grounding insert 410 and a second connection end 405 to achieve grounding connection. The other three groups of box seat mounting posts 311 can achieve fastening connection, that is, the fastening bolts can also pass through the box seat bottom plate 110 and be threadedly fitted and fastened with the other box seat mounting posts 311. Seals 301 are also provided around the tops of the other box seat mounting posts 311. A total of four groups of heat-insulating mounting holes are provided on the box seat bottom plate 110 correspondingly. An outwardly protruding mounting flange 112 is provided around the edge of each group of heat-insulating mounting holes. The mounting flange 112 is fitted and pressed tightly on the seal 301 of each group of box seat mounting posts 311 to achieve comprehensive sealing protection of the control box 100.

[0056] Furthermore, combined with Figure 4 and Figure 9 As shown, to achieve the effective installation of the housing 210 and the heat-insulating plate 300, a grounding mounting post 211 is provided in the area corresponding to the first connection end 402 on the housing 210. A threaded hole is provided in the grounding mounting post 211, and the threaded hole is a blind hole. Refer to Figure 4, the first grounding fastener 214 passes through the first connection end 402 and is threadedly fastened with the grounding mounting column 211, so that the heat insulation board 300 is fastened and installed, and it is also prevented from being connected with the inner cavity of the housing 210, avoiding heat transfer and air ingress, etc., and further reducing the generation of condensed water in the control box 100. In practice, a guide column is also provided in the area where the lower part of the heat insulation board 300 cooperates with the grounding mounting column 211, so that the grounding mounting column 211 can be embedded in the guide column and threadedly cooperate with the first grounding fastener 214 during installation. In order to achieve stable installation, in addition to the grounding mounting column 211, the housing 210 is also provided with multiple groups of housing mounting columns 212, and in addition to the first connection end 402 area, the heat insulation board 300 is also provided with multiple groups of through housing mounting holes 312, so that the fastening bolts can be passed through the heat insulation board 300 and threadedly fastened with the housing mounting column 212 downward to achieve installation. The extended height of the grounding mounting column 211 on the housing 210 is higher than the extended height of the housing mounting column 212 , so as to accommodate the height difference caused by the first connecting end 402 being hidden inside the heat insulation board 300 .

[0057] Practical construction can further choose to combine Figure 10 The grounding spring 400 includes a spring body 401, and the two ends of the spring body 401 are respectively a first connection end 402 and a second connection end 405; wherein the first connection end 402 and the second connection end 405 both extend horizontally inside the heat insulation board 300, so as to facilitate the subsequent accurate matching with the grounding fastener, so that the grounding fastener can be steadily pressed to ensure the grounding reliability; and the first connection end 402 and the second connection end 405 have different horizontal heights, specifically, the second connection end 405 provided with the grounding insert 410 is higher, and the spring body 401 also extends horizontally inside the heat insulation board 300, the spring body 401 is kept flush with the first connection end 402, and there is a bending portion 404 between the second connection end 405 and the spring body 401 to adapt to the height change. In practice, in order to ensure the grounding reliability, for the thin sheet-shaped first connection end 402 and the second connection end 405, it is necessary to ensure that the grounding fastener is in close contact and pressed with the first connection end 402 and the second connection end 405, and to maintain electrical conduction. Especially for the second connection end 405, the grounding insert 410 can not only provide a threaded hole to meet the tightening of the fastening bolt, but also effectively avoid the flash generated by injection molding around the second connection hole 411, which affects the grounding reliability of the grounding fastener. At the same time, by setting the bending portion 404, this embodiment can effectively reduce the setting length of the grounding insert 410 while meeting the installation position requirements of the first connection end 402 and the second connection end 405, thereby reducing the production cost of the grounding insert 410. According to the needs, in practice, the spring body 401 and the bending portion 404 can be freely extended in the heat insulation board 300 to ensure the metal connection between the first connection end 402 and the second connection end 405.

[0058] It should also be noted that the shielded pump unit of this embodiment is also integrally injection-molded with an outlet adapter assembly 302 on the insulation board 300, and the two ends of the outlet adapter assembly 302 extend to the upper and lower sides of the insulation board 300 respectively; one end of the outlet adapter assembly 302 penetrates into the control box 100 and is electrically connected to the circuit board, and the other end penetrates into the housing 210 and is electrically connected to the stator assembly, and sealing members 301 are respectively provided on the upper and lower sides of the insulation board 300 around the outer periphery of the outlet adapter assembly 302, and a circle of outer convex flanges are respectively provided on the box seat bottom plate 110 and the housing 210 corresponding to the installation area of ​​the outlet adapter assembly 302, combined with Figure 8 and Figure 9 As shown, the seal is performed by pressing the seal 301, wherein the housing 210 corresponds to the transfer interface flange 213. Similarly, such a design further ensures the comprehensive sealing of the control box 100, avoids communication with the outside, reduces heat transfer and air ingress, and prevents the generation of condensed water. The seal 301 can be formed by injection molding of soft plastic.

[0059] This embodiment also provides the production process of the heat insulation board mentioned above, using the heat insulation board 300 as described above, placing the grounding spring 400 in the injection mold and positioning it, and then starting injection molding, so that the grounding spring 400 is integrally formed and hidden inside the heat insulation board 300, and the first connection end 402 and the second connection end 405 of the grounding spring 400 can communicate with the outside world for installation and fastening. Furthermore, the heat insulation board 300 also has an outlet adapter component 302. During processing, the outlet adapter component is first placed in the injection mold and positioned and the first injection molding is performed, and the outer periphery of the outlet adapter component is covered with a molded shell to form the outlet adapter component 302; then the outlet adapter component 302 and the grounding spring 400 are placed in the injection mold together and positioned, and then the second injection molding is started, so that the outlet adapter component 302 and the grounding spring 400 are integrally formed inside the heat insulation board 300. In this way, a two-time injection molding process is adopted, and the outgoing line adapter element is firstly injection-molded separately into the outgoing line adapter assembly 302 to achieve pre-positioning and strength enhancement, so as to avoid compression deformation or displacement caused by directly injecting the outgoing line adapter element inside the insulation board 300. The outgoing line adapter element is firstly injection-molded separately into the outgoing line adapter assembly 302 to pre-position the outgoing line adapter element and strengthen the overall structure, and then the outgoing line adapter element is injection-molded together with the insulation board 300 and the grounding spring clip 400 for a second time to ensure the position accuracy and reliability of the outgoing line adapter element and the grounding spring clip 400.

[0060] The above is a schematic description of the present invention and its implementation mode, which is not restrictive and is only one of the implementation modes of the present invention, and is not actually limited thereto. Therefore, if a person skilled in the art is inspired by it and, without departing from the purpose of the invention, designs a structure and an implementation mode similar to the technical solution without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A heat insulation board for a canned motor pump, the heat insulation board (300) being configured to be installed between a box seat bottom plate (110) of a control box (100) and a casing (210) of a pump body (200) to block heat transfer between the pump body (200) and the control box (100), characterized in that: A grounding spring (400) is integrally injection-molded in the heat insulation board (300), and the grounding spring (400) has a first connection end (402) and a second connection end (405). A casing mounting position is provided in an area corresponding to the first connection end (402) on the heat insulation board (300), and the casing mounting position is used to cooperate with and connect to the casing (210) of the pump body (200), so that the first connection end (402) and the casing (210) can be electrically connected; and a box seat mounting position is provided in an area corresponding to the second connection end (405) on the heat insulation board (300), and the box seat mounting position is used to cooperate with and connect to the box seat bottom plate (110) of the control box (100), so that the second connection end (405) and the control box (100) can be electrically connected.

2. A heat insulation board for a canned motor pump according to claim 1, characterized in that: A casing mounting hole (312) penetrating the thickness is formed on the thermal insulation board (300) in an area corresponding to the first connecting end (402); the first connecting end (402) extends into the casing mounting hole (312) and is provided with a first connecting hole (403) corresponding to the position of the casing mounting hole (312); the casing mounting hole (312) and the first connecting hole (403) cooperate to allow a first grounding fastener (214) to pass through and then be connected to the casing (210).

3. A heat insulation board for a canned motor pump according to claim 1, characterized in that: A grounding insert (410) is provided on the second connection end (405), and a second connection hole (411) is provided in the grounding insert (410). The second connection hole (411) extends upward to the surface of the heat insulation plate (300) and is used for the second grounding fastener (113) to pass through the box base bottom plate (110) and then be fastened with the second connection hole (411).

4. A heat insulation board for a canned motor pump according to claim 3, characterized in that: A box seat mounting column (311) is formed in an area on the heat insulation board (300) corresponding to the second connection end (405), a grounding insert (410) extends correspondingly in the box seat mounting column (311), and a sealing member (301) is circumferentially provided in the box seat mounting column (311) around the top of the grounding insert (410).

5. A canned pump unit, comprising a control box (100), a pump body (200) and a heat insulation board (300), wherein the heat insulation board (300) is installed between a box base bottom plate (110) of the control box (100) and a casing (210) of the pump body (200), characterized in that: Using the heat insulation board (300) as described in claim 1, the first grounding fastener (214) passes through the first connecting end (402) and is fastened to the housing (210), and the second grounding fastener (113) passes through the bottom plate of the box seat (110) and is fastened to the second connecting end (405).

6. A canned motor pump unit according to claim 5, characterized in that: The first grounding fastener (214) is not connected to the inner cavity of the housing (210); after the second grounding fastener (113) passes through the box base bottom plate (110), a sealing member (301) is provided around the second grounding fastener (113) between the box base bottom plate (110) and the heat insulation plate (300) to seal.

7. A canned motor pump unit according to claim 5, characterized in that: A grounding mounting post (211) is provided in an area corresponding to the housing (210) and the first connection end (402); a threaded hole is provided in the grounding mounting post (211), and the threaded hole is a blind hole; a first grounding fastener (214) passes through the first connection end (402) and is threadedly fastened to the grounding mounting post (211).

8. A canned motor pump unit according to claim 5, characterized in that: A grounding insert (410) is provided on the second connection end (405), a second connection hole (411) is provided in the grounding insert (410), a heat-insulating installation hole that penetrates the thickness is provided in an area corresponding to the second connection hole (411) on the bottom plate (110) of the box seat, and a second grounding fastener (113) passes through the bottom plate (110) of the box seat through the heat-insulating installation hole and is threadedly fastened to the second connection hole (411).

9. A canned motor pump unit according to claim 8, characterized in that: A box seat mounting column (311) is formed on the thermal insulation board (300) in an area corresponding to the second connection end (405); a grounding insert (410) extends correspondingly inside the box seat mounting column (311); and a sealing member (301) is circumferentially arranged around the top of the grounding insert (410) inside the box seat mounting column (311); and a mounting flange (112) protruding outward is arranged around the edge of the thermal insulation mounting hole on the box seat bottom plate (110), and the mounting flange (112) is pressed against the sealing member (301) in cooperation.

10. A canned motor pump unit according to any one of claims 5 to 9, characterized in that: The grounding spring (400) comprises a spring body (401), and two ends of the spring body (401) are respectively a first connection end (402) and a second connection end (405); the first connection end (402) and the second connection end (405) both extend horizontally inside the heat insulation board (300), and the first connection end (402) and the second connection end (405) have different horizontal heights.

11. A canned motor pump unit according to claim 8, characterized in that: The grounding insert (410) is riveted on the second connection end (405) and is integrally injection molded together with the heat insulation board (300), and a circle of recessed portions (412) is circumferentially arranged in the middle of the outer wall of the grounding insert (410).

12. A canned motor pump unit according to any one of claims 5 to 9, characterized in that: An outlet line adapter component (302) is also integrally injection molded on the heat insulation board (300), and two ends of the outlet line adapter component (302) extend to the upper and lower sides of the heat insulation board (300) respectively; one end of the outlet line adapter component (302) penetrates into the control box (100) to be electrically connected to the circuit board, and the other end penetrates into the housing (210) to be electrically connected to the stator component; sealing components (301) are respectively provided on the upper and lower side surfaces of the heat insulation board (300) around the outer periphery of the outlet line adapter component (302); and a circle of outer convex flanges are respectively provided on the box seat bottom plate (110) and the housing (210) corresponding to the installation area of ​​the outlet line adapter component (302) to compress the sealing component (301) for sealing.

13. A production process of a heat insulation board for a canned motor pump, using the heat insulation board (300) as claimed in any one of claims 1 to 11, characterized in that: After the grounding spring (400) is placed in the injection mold and positioned, injection molding is started, so that the grounding spring (400) is integrally formed inside the heat insulation board (300), and the first connection end (402) and the second connection end (405) of the grounding spring (400) can be communicated with the outside world for installation and fastening.

14. The production process of a heat insulation board for a canned motor pump according to claim 13, characterized in that: The heat insulation board (300) also has an outlet line adapter component (302). During processing, the outlet line adapter component is first placed in an injection mold for positioning and a first injection molding is performed, and a molded shell is coated around the outer periphery of the outlet line adapter component to form the outlet line adapter component (302); the outlet line adapter component (302) and the grounding spring sheet (400) are then placed in the injection mold for positioning, and a second injection molding is performed, so that the outlet line adapter component (302) and the grounding spring sheet (400) are integrally formed inside the heat insulation board (300).

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