A heat insulation device for duplex pump body

Abstract

The utility model discloses a kind of duplex pump body heat preservation isolation devices, belong to centrifugal water pump field.The utility model includes rear heat preservation part and front heat preservation part, rear heat preservation part is arranged from the side of pump shell away from casing along the axial direction to the direction of approaching casing, and rear heat preservation part is integrated structure, the rear end of two pump shells is integrally coated inside;Front heat preservation part is arranged from the side of pump shell facing casing along the axial direction to the direction of approaching the front end of pump shell, the front end of two pump shells is coated inside, and two seat holes for assembling two casings are formed in the middle of front heat preservation part;Rear heat preservation part and front heat preservation part are spliced front and back along the axial direction of pump shell.The utility model uses integrated rear heat preservation part structure, can effectively reduce the quantity of heat preservation part, is convenient for installation, also conducive to reducing heat loss.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal water pump technology, and more specifically, to a heat insulation and isolation device for a dual-pump body. Background Technology

[0002] Pump units can pump both media with temperatures higher than ambient temperature and media with lower temperatures. Therefore, thermal insulation is required on the pump casing. This serves two purposes: firstly, it provides contact protection, preventing heat transfer from the pump casing to nearby objects when pumping hot media, thus minimizing the risk of combustion. Secondly, the insulation optimizes efficiency because heat is transferred to the consumable parts instead of being dissipated into the pump casing environment, or the coolant does not absorb heat from the external environment of the pump casing. Furthermore, temperature differences can cause water droplets to form or even ice to form on the pump casing, which can be prevented by the insulation. Additionally, the insulation is typically made of foamed flame-retardant materials and also helps to reduce water flow noise within the pump body, improving customer satisfaction.

[0003] However, existing thermal insulation devices are mainly designed for single-pump systems, which have relatively simple structures and are easy to wrap and fix with insulation layers. But for tandem pump structures, due to the complex pump body structure and compact space, traditional thermal insulation devices struggle to achieve complete coverage, resulting in uneven insulation layer coverage, leaving exposed areas and reducing insulation effectiveness. This also limits the application of tandem pumps under extreme temperature conditions and increases energy consumption and equipment maintenance costs. Therefore, it is essential to develop a thermal insulation method for tandem pumps that is simple to manufacture and easy to assemble. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model

[0005] To address the difficulty in effectively insulating and isolating the structure of dual pumps in existing technologies, a dual pump body insulation and isolation device is proposed. This device is applicable to dual pump structures, achieving effective and comprehensive insulation and isolation, and is simple in structure and easy to assemble.

[0006] 2. Technical Solution

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] This utility model discloses a dual-pump body heat preservation and isolation device, comprising an integrally connected and identical first pump casing and a second pump casing, the front ends of which are configured and installed with the axial end of the housing, and the two pump casings are arranged side by side in a radial direction perpendicular to the axial direction of the housing; it also includes:

[0009] The rear insulation section is arranged axially from the side of the pump casing away from the machine casing towards the machine casing, and the rear insulation section is an integral structure that completely covers the rear ends of the two pump casings.

[0010] The front insulation section is arranged axially from the side of the pump casing facing the machine casing towards the front end of the pump casing, covering the front ends of the two pump casings, and the middle of the front insulation section forms two seat holes for assembling the two machine casings.

[0011] The rear and front insulation sections are joined together along the axial direction of the pump casing. The integrated rear insulation structure effectively reduces the number of insulation components, facilitating installation and minimizing heat loss.

[0012] To ensure a tight fit between the front and rear insulation sections, a rear connecting section is provided on the rear insulation section, and a front connecting section is provided on the front insulation section. The rear connecting section and the front connecting section are arranged correspondingly along the front and rear axial direction of the pump casing to lock the rear insulation section and the front insulation section in an axial fit and prevent axial movement.

[0013] The front insulation section can adopt different structural designs. For example, it can be a one-piece structure with a first and second mounting holes in the middle for the first and second housings to pass through. The front insulation section is arranged axially towards the front end of the pump housing to completely cover the front ends of both pump housings. By using a one-piece structure for both the front and rear insulation sections, they can be spliced ​​together to fully cover the pump housing, effectively reducing the number of separate parts.

[0014] Furthermore, the front insulation section is a split structure composed of an upper covering section and a lower covering section. The upper and lower covering sections are correspondingly arranged on the upper and lower sides along the parallel extension direction of the first and second pump casings. The upper and lower covering sections are respectively arranged axially towards the front end of the pump casing, and after being spliced, they cover the front ends of the two pump casings. Using a two-part split structure for the front insulation section simplifies installation, and with fewer sections, it provides better insulation performance.

[0015] Furthermore, the front insulation section has a split structure, including at least a first split component surrounding the outer region of the front end of the first pump housing, a second split component surrounding the outer region of the front end of the second pump housing, and a third split component disposed in the region between the first and second pump housings. The first and second split components are arranged at their ends along the parallel extension direction of the first and second pump housings. Adopting a multi-component split design for the front insulation section simplifies installation, makes it more suitable for different installation scenarios, and facilitates user self-assembly.

[0016] Furthermore, the first, second, and third split components are all split structures, each including an upper split component and a lower split component arranged on the upper and lower sides along the parallel extension direction of the first and second pump housings.

[0017] To ensure the tightness of the splicing during the design of the front insulation section, the upper covering section is further provided with an upper connector and the lower covering section is provided with a lower connector. The upper connector and the lower connector are arranged on the upper and lower sides of the first pump housing and the second pump housing in parallel extension direction, and are used to lock the upper covering section and the lower covering section together.

[0018] Furthermore, the front end of the pump casing is used to mate with the machine casing for installation, and the rear end of the pump casing is located axially at the rear end of the front end away from the machine casing, and the front end and the rear end together form the pump cavity; an outlet flange and an inlet flange that communicate with the internal pump cavity are provided between the first pump casing and the second pump casing, and the outlet flange and the inlet flange are distributed on the upper and lower sides along the parallel extension direction of the first pump casing and the second pump casing.

[0019] To achieve integrated coverage of the rear insulation section, the second pump housing has a splicing section between the second rear end and the second front end, and the splicing section has the maximum radial diameter of the second pump housing; the rear insulation section and the front insulation section are spliced ​​together at the splicing section; the first pump housing has a first front end and a first rear end with the same structure.

[0020] To further improve the pump body performance, a second fixing part extending axially is provided on the side of the second rear end opposite to the second front end. The axial end of the second fixing part forms a support plane, and a second fixing hole is provided on the support plane. The first pump housing has a first fixing part and a first fixing hole with the same structure. The rear insulation part integrally covers the first fixing part and the second fixing part.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0023] (1) In this utility model, a splicing section is formed on the pump casing, so that the rear insulation section and the front insulation section can be spliced ​​together along the axial direction of the pump casing. The rear insulation section can achieve an integrated contoured wrapping of the rear end of the pump casing, which effectively reduces the number of parts, is convenient to install and has good insulation. After being locked with the connector, it further prevents movement and ensures tight wrapping.

[0024] (2) In this utility model, the front insulation part can be designed as an integrated unit or a split unit. The integrated unit design minimizes the number of split units, ensuring insulation effect and installation convenience. The split unit design is more conducive to assembly at the client end. Thus, choosing the appropriate separation combination can meet different user needs, such as being suitable for pre-assembly before leaving the factory or facilitating assembly at the client end. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the dual pump in the embodiment;

[0026] Figure 2 This is a schematic diagram of the dual pump from another perspective in the embodiment;

[0027] Figure 3 This is a schematic diagram of the pump casing structure of the dual pump in the embodiment;

[0028] Figure 4 This is a schematic diagram of the disassembled structure of the thermal insulation device in one embodiment;

[0029] Figure 5 This is a schematic diagram of the assembled structure of the thermal insulation device in another embodiment;

[0030] Figure 6 for Figure 5 A schematic diagram of the disassembled structure of the thermal insulation isolation device;

[0031] Figure 7 This is a schematic diagram of the split-state structure of the thermal insulation and isolation device in another embodiment.

[0032] Explanation of the labels in the diagram:

[0033] 100, First pump; 110, First pump housing; 120, First machine housing; 130, First control box; 111, First fixing part; 112, First fixing hole; 114, First front end;

[0034] 101. Outlet flange; 102. Inlet flange;

[0035] 200, Second pump; 210, Second pump housing; 220, Second housing; 230, Second control box; 211, Second fixing part; 212, Second fixing hole; 213, Second rear end part; 214, Second front end part; 215, Splicing section part;

[0036] 300. Rear insulation section; 301. Edge wrapping section; 302. Rear wrapping section; 303. Rear connecting section;

[0037] 400. Front insulation section; 401. Integrated covering section; 402. First mounting hole; 403. Second mounting hole; 404. Front connecting section; 410. Upper covering section; 411. Upper connecting piece; 420. Lower covering section; 421. Lower connecting piece; 431. Separate section one; 432. Separate section two; 433. Separate section three; 434. Separate section four; 435. Separate section five; 436. Separate section six. Detailed Implementation

[0038] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0039] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. The terms "first," "second," "third," and "fourth" should also be interpreted broadly, merely distinguishing feature names and not indicating a specific sequential relationship. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The present invention will be further described below with reference to the embodiments.

[0042] Example

[0043] Combination Figures 1-7 As shown, this embodiment provides a dual-pump body heat preservation and isolation device, including a first pump housing 110 and a second pump housing 210 that are integrally connected and have the same structure. First, combined with Figures 1-3 The structure of the dual-pump system is described, including a first pump 100 and a second pump 200 arranged side-by-side. Each pump has a pump casing, and the front ends of both pump casings are configured for installation with the axial end of the housing. The two pump casings are arranged side-by-side along a radial direction perpendicular to the axial direction of the housing. In this embodiment, the axial direction refers to the axial length direction of the housing. Figure 1The direction of the arrow 'a' is axial; the parallel extension direction of the two pump housings is perpendicular to the axial direction 'a', and can be considered as being arranged side by side along the same radial direction of the two housings. Each pump housing has a front end and a rear end. The front end of the pump housing is used to mate with the housing, and the rear end of the pump housing is located axially at the rear end of the front end away from the housing, and the front and rear ends together form the pump cavity. Specifically, the first pump housing 110 has a first front end 114 that mates with the first housing 120, and a first control box 130 is provided above the first housing 120. The first rear end of the first pump housing 110 is located at the axial rear end of the first front end 114. The second pump housing 210 has a second front end 214 that mates with the second housing 220, and a second control box 230 is provided above the second housing 220. The second rear end 213 of the second pump housing 210 is located at the axial rear end of the second front end 214. Furthermore, an outlet flange 101 and an inlet flange 102, communicating with the internal pump cavity, are provided between the first pump casing 110 and the second pump casing 210. The outlet flange 101 and the inlet flange 102 are distributed along the upper and lower sides of the parallel extending direction of the first pump casing 110 and the second pump casing 210. Figure 1 As shown in the orientation diagram, the first pump casing 110 and the second pump casing 210 are arranged side by side in a horizontal direction, and the outlet flange 101 and the inlet flange 102 are arranged vertically. The first pump 100 and the second pump 200 share a common inlet and outlet channel.

[0044] For this type of dual-unit pump, the structure is more complex than that of a single-unit pump. The pump casing and the housing are generally cylindrical, which further increases the difficulty and complexity of completely covering the insulation components. The applicant has tried to use an integral or split design for wrapping, but the integral design has poor structural adaptability, is difficult to accurately conform to the shape, and is difficult to install and maintain without disassembling the pump body and piping. If the conventional split installation method is used, each pump body needs to be assembled with multiple covering blocks, resulting in a large number of split parts for assembly. Too many split parts not only make the installation process more complicated and cumbersome, but the overly scattered split design is also more likely to cause heat leakage at the splicing gaps, making it difficult to meet the application requirements.

[0045] Based on this, in order to achieve accurate contour-following coverage while minimizing the number of covered components, the structural design of the first pump 100 and the second pump 200 has been optimized in this embodiment, combined with... Figure 3 and Figure 4As shown, taking the second pump housing 210 as an example, a splicing section 215 is formed between the second rear end portion 213 and the second front end portion 214 of the second pump housing 210. The splicing section 215 has the maximum radial diameter of the second pump housing 210. Specifically, both the second rear end portion 213 and the second front end portion 214 have circular cross-sections. The second rear end portion 213 can be designed with a constant diameter along the axial direction, or with a gradually increasing diameter along the direction close to the second front end portion 214. The diameter of the second front end portion 214 is slightly smaller than the diameter at the junction with the second rear end portion 213. Thus, the splicing section 215 with the maximum diameter is formed at the junction of the second front end portion 214 and the second rear end portion 213. Similarly, the first pump 100 has the same structure, and a flush splicing section 215 is also formed at the junction of its first front end portion 114 and its first rear end portion. In this way, the splicing section 215 can be used as a splicing plane to splice and cover the double pump body in the front and rear axial directions.

[0046] In this embodiment, the thermal insulation device includes a rear thermal insulation section 300 and a front thermal insulation section 400. The rear thermal insulation section 300 and the front thermal insulation section 400 are spliced ​​together along the axial direction of the pump casing. Specifically, the rear thermal insulation section 300 and the front thermal insulation section 400 are spliced ​​together at the splicing section 215. Figure 4 As shown, the rear insulation section 300 is arranged axially towards the machine housing from the side of the pump casing away from the machine housing, i.e., it is assembled forward along the direction of arrow A. Since the splicing section 215 is at its maximum diameter and there are no other complex structures installed at the rear end of the pump casing, the rear insulation section 300 can be directly and accurately nested into the rear end of the dual pump, completely covering the rear ends of both pump casings. More specifically, the rear insulation section 300 includes an edge covering section 301 surrounding the rear end and a rear covering section 302 that covers the rear end of the rear end portion forward. The enclosing cavity formed in the edge covering section 301 and the rear covering section 302 is designed to conform to the shape of the rear ends of the two pump casings, enabling a tight fit and effective insulation, and the forward splicing process is not hindered. The front insulation section 400 is arranged axially from the side of the pump casing facing the machine casing towards the front end of the pump casing, i.e., it is assembled backward along the direction of arrow B, covering the front ends of the two pump casings. The middle of the front insulation section 400 forms two mounting holes for assembling the two machine casings. Thus, with the splicing section 215 as the dividing interface, a front-to-back splicing design is formed, and the rear insulation section 300 can be designed as a single unit, effectively reducing the number of separate parts, facilitating installation, and providing good insulation.

[0047] To improve the tightness and stability of the assembly of the rear insulation section 300 and the front insulation section 400, more preferably, the rear insulation section 300 is provided with a rear connecting part 303, and the front insulation section 400 is provided with a front connecting part 404. The rear connecting part 303 and the front connecting part 404 are arranged correspondingly along the front-rear axial direction of the pump casing, for axially engaging and locking the rear insulation section 300 and the front insulation section 400. Figure 4 As shown, rear connecting parts 303 can be provided at both ends of the upper and lower surfaces of the circumferential covering part 301 of the rear insulation part 300. Correspondingly, front connecting parts 404 are also provided at both ends of the upper and lower surfaces of the front insulation part 400. The rear connecting parts 303 and the front connecting parts 404 can be directly plugged in and positioned synchronously during assembly to position and connect the rear insulation part 300 and the front insulation part 400. Alternatively, the rear connecting parts 303 and the front connecting parts 404 can be used as protruding connecting blocks with connecting grooves, and the rear connecting parts 303 and the front connecting parts 404 can be tied together with connecting ropes to achieve positioning and connection. Various connection and fixing methods can be used according to installation needs to tightly connect the rear insulation part 300 and the front insulation part 400 axially and prevent axial movement.

[0048] In practice, it can be further optimized by combining... Figure 1 and Figure 3 As shown, the second rear end portion 213, on the side opposite to the second front end portion 214, is also provided with a second fixing part 211 extending axially. The axial end of the second fixing part 211 forms a support plane, and the support plane is provided with a second fixing hole 212. The first pump housing 110 has a first fixing part 111 and a first fixing hole 112 with the same structure. The rear insulation part 300 integrally covers the first fixing part 111 and the second fixing part 211. Specifically, both the second fixing part 211 and the first fixing part 111 can adopt a cross structure, and a flat support end face is formed on the rear end face of the cross. This support plane can be used as a support surface during pump body installation or transportation to facilitate installation or placement. Furthermore, threaded holes are opened on this support plane as fixing holes. During installation or transportation, fixing plates can be installed to ensure the stability of the pump body position and avoid damage such as shaking and collision. Furthermore, the length of the cross is controlled to be smaller than the diameter of the splicing section 215, so that when the rear insulation part 300 is assembled forward along direction A, it can fit against the pump body surface without obstruction, simultaneously enclosing the cross. The rear covering part 302 of the rear insulation part 300 conforms to the cross, and the cross also provides effective positioning, preventing the rear insulation part 300 from deflecting or wobbling, thus ensuring a stable position.

[0049] In practice, the front insulation section 400 can adopt different design schemes, such as one of the schemes, which combines... Figure 4As shown, the front insulation section 400 also adopts an integrated structure. Specifically, the front insulation section 400 includes an integrated covering section 401 surrounding the outer periphery of the first front end portion 114 and the second front end portion 214. The integrated covering section 401 has a first mounting hole 402 and a second mounting hole 403 for the first housing 120 and the second housing 220 to pass through. The front insulation section 400 is arranged axially towards the front end of the pump housing, i.e., assembled backwards along arrow direction B, to completely cover the front ends of the two pump housings. By adopting an integrated design for the front insulation section 400, the entire insulation and isolation device only requires a front and rear two-part design for assembly. This design accurately conforms to the pump body structure while minimizing the number of parts, ensuring insulation performance, and is simple in structure and easy to install. It should be noted that this installation method is more suitable for pre-assembling the insulation and isolation device at the factory before the pump body leaves the factory, eliminating the need for disassembly and assembly by the customer. In this installation method, before installing the first housing 120 and the second housing 220, the first pump housing 110 and the second pump housing 210 can be pre-assembled axially to cover the rear insulation section 300 and the front insulation section 400. Then, the first housing 120 and the second housing 220 can be installed, followed by the first control box 130 and the second control box 230. By pre-assembling the rear insulation section 300 and the front insulation section 400, the customer does not need to disassemble and reassemble the machine for insulation installation after the product arrives at the customer's location, simplifying the customer's operation. Alternatively, the first housing 120 and the second housing 220 can be installed first, and the first control box 130 and the second control box 230 can be installed before them. Since the first housing 120 and the second housing 220 are generally cylindrical with a certain draft angle, the front insulation section 400 can pass through the two housings using the intermediate seat hole and gradually move backward until it engages with the rear insulation section 300. Then, the first control box 130 and the second control box 230 can be installed.

[0050] The front insulation section 400 can also be designed as a separate unit, such as when combined with... Figure 5 and Figure 6As shown, the front insulation section 400 is a split structure composed of an upper covering section 410 and a lower covering section 420. The upper covering section 410 and the lower covering section 420 are correspondingly arranged on the upper and lower sides along the parallel extension direction of the first pump housing 110 and the second pump housing 210. The upper covering section 410 and the lower covering section 420 are respectively arranged axially towards the front end of the pump housing, that is, assembled backward along the direction of arrow B, and after being assembled, they cover the front ends of the two pump housings. At this time, both the upper covering section 410 and the lower covering section 420 have semi-circular holes with opposite openings. The upper and lower parts together form the first seat hole 402 and the second seat hole 403 covering the outside of the housing. To ensure the stability of the connection between the upper covering portion 410 and the lower covering portion 420, the upper covering portion 410 is provided with an upper connecting member 411, and the lower covering portion 420 is provided with a lower connecting member 421. The upper connecting member 411 and the lower connecting member 421 are arranged correspondingly on the upper and lower sides along the parallel extension direction of the first pump housing 110 and the second pump housing 210, and are used to lock the upper covering portion 410 and the lower covering portion 420 together. The connection method of the upper connecting member 411 and the lower connecting member 421 can refer to the connection method between the rear connecting portion 303 and the front connecting portion 404. The upper covering portion 410 and the lower covering portion 420 are also provided with a front connecting portion 404 to cooperate with the rear connecting portion 303 for positioning connection. In this way, the stability of the split assembly in the front and rear axial direction is ensured, as well as the stability of the split assembly in the upper and lower radial direction. In this assembly method, after the first housing 120 and the second housing 220 are installed, the upper covering portion 410 and the lower covering portion 420 are passed through the housing until they join with the rear insulation portion 300, and then the first control box 130 and the second control box 230 are installed. The installation of the control boxes is relatively convenient. This method allows for pre-assembly at the factory or self-assembly at the customer's location, making installation convenient and easy for the customer to operate.

[0051] The front insulation section 400 can also adopt a multi-part design. For example, if the front insulation section 400 is a split structure, it includes at least a first split component surrounding the outer region of the front end of the first pump housing 110, a second split component surrounding the outer region of the front end of the second pump housing 210, and a third split component arranged in the region between the first pump housing 110 and the second pump housing 210. The first and second split components are arranged at both ends along the parallel extension direction of the first pump housing 110 and the second pump housing 210. That is, the front insulation section 400 is divided into at least three split components, two of which respectively cover the outer arc surfaces of the two pump housings from both radial sides, and a separate split component is provided to be inserted between the two pump housings for assembly. Furthermore, to further improve convenience, the first, second, and third split components are all split structures, each including an upper split component and a lower split component arranged on the upper and lower sides along the parallel extension direction of the first pump housing 110 and the second pump housing 210. Specifically, in conjunction with... Figure 7As shown, the front insulation section 400 includes a first split section 431, a second split section 432, a third split section 433, a fourth split section 434, a fifth split section 435, and a sixth split section 436. The first split section 431 and the sixth split section 436 can serve as the first split component, the second split section 432 and the fifth split section 435 as the second split component, and the third split section 433 and the fourth split section 434 as the third split component. Similarly, connecting parts that fit together vertically can be provided between the upper and lower split structures to ensure a stable connection in the vertical direction. Using this multi-split design, the front insulation section 400 can be freely assembled after the first control box 130 and the second control box 230 are installed, i.e., after the entire pump body is installed. This is more suitable for the customer to assemble themselves, making operation more convenient.

[0052] In this embodiment, the splicing section 215 of the pump casing is designed to form a splicing surface along the front and rear axial directions, so that the rear insulation section 300 can adopt a unified integrated structure, effectively reducing the number of components and improving the insulation effect. The front insulation section 400 can be selected as an integrated or split design according to the requirements. In practice, the appropriate separation combination can meet the needs of different users, making it suitable for pre-assembly before leaving the factory or convenient for assembly at the customer's end, with greater flexibility and selectivity.

[0053] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A double pump body heat insulation device, comprising a first pump shell (110) and a second pump shell (210) which are integrally connected and have the same structure, the front ends of the two pump shells are used for installation with the axial end of a machine shell, and the two pump shells are arranged side by side along a radial direction perpendicular to the axial direction of the machine shell; characterized in that, Also includes: The rear insulation part (300) is arranged axially from the side of the pump casing away from the machine casing towards the machine casing, and the rear insulation part (300) is an integral structure that completely covers the rear ends of the two pump casings. The front insulation part (400) is arranged axially from the side of the pump housing facing the machine housing towards the front end of the pump housing, covering the front ends of the two pump housings, and the middle of the front insulation part (400) forms two seat holes for assembling the two machine housings. The rear insulation section (300) and the front insulation section (400) are spliced ​​together along the axial direction of the pump casing.

2. The double pump body thermal insulation device according to claim 1, characterized in that: The rear insulation part (300) is provided with a rear connecting part (303), and the front insulation part (400) is provided with a front connecting part (404). The rear connecting part (303) and the front connecting part (404) are arranged correspondingly along the front and rear axial directions of the pump casing, and are used to lock the rear insulation part (300) and the front insulation part (400) in axial cooperation.

3. The double pump body thermal insulation device according to claim 1, characterized in that: The front insulation part (400) is an integral structure with a first seat hole (402) and a second seat hole (403) in the middle for the first housing (120) and the second housing (220) to pass through. The front insulation part (400) is arranged axially towards the front end of the pump housing so as to completely cover the front end of the two pump housings.

4. The double pump body thermal insulation device according to claim 1, characterized in that: The front insulation section (400) is a split structure composed of an upper covering section (410) and a lower covering section (420). The upper covering section (410) and the lower covering section (420) are respectively arranged on the upper and lower sides along the parallel extension direction of the first pump housing (110) and the second pump housing (210). The upper covering section (410) and the lower covering section (420) are respectively arranged axially towards the front end of the pump housing, and after being spliced ​​together, they cover the front ends of the two pump housings.

5. The double pump body thermal isolation device of claim 1, wherein: The front insulation section (400) is a split structure, including at least a first split member surrounding the outer region of the front end of the first pump housing (110), a second split member surrounding the outer region of the front end of the second pump housing (210), and a third split member arranged in the region between the first pump housing (110) and the second pump housing (210). The first split member and the second split member are arranged at both ends along the parallel extension direction of the first pump housing (110) and the second pump housing (210).

6. The double pump body thermal isolation device of claim 5, wherein: The first, second, and third components are all separate structures, each including an upper component and a lower component arranged on the upper and lower sides along the parallel extension direction of the first pump housing (110) and the second pump housing (210).

7. The double pump body thermal isolating device of claim 4, wherein: The upper covering section (410) is also provided with an upper connector (411), and the lower covering section (420) is provided with a lower connector (421). The upper connector (411) and the lower connector (421) are arranged on the upper and lower sides of the first pump housing (110) and the second pump housing (210) in parallel extension direction, and are used to lock the upper covering section (410) and the lower covering section (420) together.

8. The double pump body thermal isolating device according to any one of claims 1-7, characterized in that: The front end of the pump casing is used to mate with the housing for installation. The rear end of the pump casing is located axially at the rear end of the front end away from the housing, and the front end and the rear end together form the pump cavity. An outlet flange (101) and an inlet flange (102) communicating with the internal pump cavity are provided between the first pump casing (110) and the second pump casing (210). The outlet flange (101) and the inlet flange (102) are distributed on the upper and lower sides along the parallel extension direction of the first pump casing (110) and the second pump casing (210).

9. A heat insulation and isolation device for a dual-pump body according to claim 8, characterized in that: The second pump housing (210) has a splicing section (215) between the second rear end (213) and the second front end (214), and the splicing section (215) has the maximum radial diameter of the second pump housing (210); the rear insulation section (300) and the front insulation section (400) are spliced ​​together at the splicing section (215); the first pump housing (110) has a first front end (114) and a first rear end with the same structure.

10. The double pump body thermal isolating device of claim 9, wherein: The second rear end (213) is provided with a second fixing part (211) extending axially on the side opposite to the second front end (214). The second fixing part (211) has a support plane at its axial end, and a second fixing hole (212) is provided on the support plane. The first pump housing (110) has a first fixing part (111) and a first fixing hole (112) with the same structure. The rear heat insulation part (300) integrally covers the first fixing part (111) and the second fixing part (211).

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