Circulating pump casing structure and circulating pump equipment with casing structure

Abstract

This utility model relates to a circulating pump housing structure and a circulating pump device with a housing structure. The housing structure is mounted on a circulating pump, which includes a pump head, a sealing ring, and bolts. The housing structure includes an end face manifold, an external guide groove, an internal guide groove, and a housing flange end face. The bolts pass through the housing flange end face and are fastened to the pump head, compressing the axial height of the sealing ring. The end face manifold is formed on the housing flange end face and extends radially to the external guide groove. The bottom plane of the end face manifold extends axially to the internal guide groove, causing the axial bottom surfaces of the internal guide groove and the bottom planes of the external guide groove to be axially staggered. Compared with the prior art, this utility model has the advantages of simultaneously preventing condensation and external splashing.

Description

Technical Field

[0001] This utility model relates to a circulating pump device, and more particularly to a circulating pump housing structure and a circulating pump device having a housing structure. Background Technology

[0002] As the core power unit of a liquid circulation system, the circulating pump's core function is to continuously drive fluid circulation through mechanical energy, achieving heat exchange, media transfer, or pressure maintenance. It is widely used in HVAC, industrial cooling, hot water supply, chemical processes, and new energy sources (such as heat pumps and fuel cells). Under certain operating conditions, changes in humidity or temperature can lead to condensation. Condensation can cause corrosion of internal pump components and short circuits, affecting the pump's reliability and lifespan. Furthermore, in the actual operating environment of circulating pumps, liquid splashing can occur. If the casing is not adequately protected, water entering the pump can damage critical components, causing corrosion and short circuits, further impacting the pump's reliability and lifespan. Therefore, the circulating pump casing must have a certain degree of condensation and splash protection. However, current condensation-resistant casings often focus on condensation drainage, neglecting the protection against external splashes.

[0003] A search revealed a Chinese patent publication number CN219452482U that proposed a condensate drain structure for a water pump motor base. In this structure, both the internal condensate drain and the end condensate drain (straight groove opening) are connected to the drainage groove and share a common end face. The drainage efficiency of this method is highly dependent on the installation angle and draft angle of the housing. The complex internal structure of the housing may have dead corners or local depressions, allowing condensate to remain inside. A small draft angle may cause condensate to accumulate in the reverse direction, exacerbating the risk of corrosion. In addition, the drainage hole or guide groove may become an intrusion path for external liquids (such as rainwater or flushing water), causing the housing's most important protective function to fail.

[0004] Therefore, designing a casing that can prevent condensation and splashing, thereby achieving the effect of draining condensate from the inside of the circulating pump and preventing splashing water from entering, preventing corrosion of components, and thus extending the service life of the circulating pump, has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a circulating pump housing structure that is both condensate-proof and splash-proof, as well as a circulating pump device with a housing structure.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a circulating pump housing structure is provided, which is installed on a circulating pump, the circulating pump including a pump head, a sealing ring and bolts, and the housing structure including an end face confluence groove, an external guide groove, an internal guide groove and a housing flange end face;

[0008] The bolt passes through the end face of the housing flange and is fastened to the pump head, compressing the axial height of the sealing ring; the end face manifold is formed on the end face of the housing flange and extends radially to the outer guide groove; the bottom plane of the end face manifold extends axially to the inner guide groove, so that the axial bottom surface of the inner guide groove and the bottom plane of the outer guide groove are axially staggered.

[0009] As a preferred technical solution, the external guide groove has an asymmetrical opening structure.

[0010] As a preferred technical solution, at least two external guide slots are provided, and they are symmetrically distributed based on the Y-axis of the housing structure.

[0011] As a preferred technical solution, the opening angle θ2 of the external guide groove near the axis O of the housing structure is greater than the opening angle θ1 away from the axis O of the housing structure.

[0012] As a preferred technical solution, at least two internal guide slots are provided, and they are symmetrically distributed based on the Y-axis of the casing structure.

[0013] As a preferred technical solution, the spacing L1 of the external conductive grooves on the same side is greater than the spacing L2 of the internal conductive grooves on the same side.

[0014] As a preferred technical solution, the interior of the housing structure is shaped with an arc surface near the internal guide groove for installing the iron core, and the arc surface is left with a height space for condensate drainage.

[0015] According to another aspect of the present invention, a circulating pump device with a housing structure is provided, including a pump head, a sealing ring, a shielding tank and bolts, the circulating pump device further including the aforementioned housing structure.

[0016] As a preferred technical solution, the housing flange end face is provided with a fastening through hole, the pump head is provided with a threaded hole, and the bolt passes through the fastening through hole on the housing flange end face and is fastened to the threaded hole of the pump head.

[0017] As a preferred technical solution, the shielding tank includes a first flanged plane and a second flanged plane, wherein the first flanged plane contacts the sealing ring and the second flanged plane contacts the end face of the housing flange.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1) This utility model adopts an arrangement in which the axial bottom surface of the internal guide groove is axially offset from the bottom plane of the external guide groove, forming a unique unidirectional fluid channel, which prevents external splashing water from flowing directly from the external guide groove into the internal guide groove, and then from entering the circulation pump from the internal guide groove.

[0020] 2) The axial staggered arrangement of this utility model increases the depth of the internal guide groove and provides multiple internal and external guide grooves, so that the product is not affected by the installation direction and realizes the one-way discharge of internal condensate.

[0021] 3) While the bottom surfaces of the inner and outer guide grooves are staggered, the outer guide groove adopts a connector structure and different sizes of openings inside and outside. This effectively drains the internal condensate while preventing external splash water from entering the circulation pump through the guide groove. This increases the casing's ability to prevent external splash water, reduces the risk of external impact, and greatly enhances the protection capability.

[0022] 4) The inside of the casing of this utility model has a beveled surface near the internal guide groove for installing the iron core. The beveled surface leaves a height space for the drainage of condensate, so as to avoid the formation of a liquid tension surface inside the casing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the installation of the circulating pump of this utility model;

[0024] Figure 2 This is an exploded view of the circulating pump of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the sealing surface of the circulating pump of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the housing and the guide groove of this utility model;

[0027] Figure 5 This is a schematic diagram of the internal and external conductive grooves of this utility model;

[0028] Figure 6 This is a schematic diagram illustrating the external splash water and internal condensate water drainage of this utility model;

[0029] Figure 7 This is a schematic diagram of the installation of the housing core of this utility model.

[0030] Where O is the outlet, I is the inlet, and P is the horizontal plane;

[0031] a is the pump head, b is the sealing ring, c is the impeller, d is the rotor support, e is the rotor, f is the shielding tank, g is the armature winding, h is the housing structure, i is the bolt, and j is the housing assembly.

[0032] a1 is the threaded hole, a2 is the inner cavity sealing surface, b1 is the flange plane, f1 is the first flange plane, f2 is the second flange plane, and h1 is the fastening through hole;

[0033] 1 is the end face confluence groove, 2 is the external guide groove, 3 is the internal guide groove, 4 is the housing flange end face, 5 is the bottom plane of the confluence groove, 6 is the bottom plane of the external guide groove, 7 is the axial bottom surface of the internal guide groove, 8 is the radial bottom surface of the internal guide groove, 9 is the inward opening of the external guide groove, 10 is the outward opening of the external guide groove, 11 is the arc surface, 12 is the external splash water, 13 is the internal condensate water, 14 is the iron core, and H is the condensate water discharge height. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0035] Example 1

[0036] like Figure 3 and Figure 4 As shown, a circulating pump housing structure j is mounted on a circulating pump. The circulating pump includes a pump head a, a sealing ring b, and a bolt i. The housing structure j includes an end face manifold 1, an external guide groove 2, an internal guide groove 3, and a housing flange end face 4. The bolt i passes through the housing flange end face 4 and is fastened to the pump head a, compressing the axial height of the sealing ring b. The end face manifold 1 is formed on the housing flange end face 4 and extends radially to the external guide groove 2. The bottom plane 5 of the end face manifold extends axially to the internal guide groove 3, so that the axial bottom surface 7 of the internal guide groove and the bottom plane 6 of the external guide groove are axially staggered.

[0037] The internal guide groove 3 has a certain draft angle. The end face confluence groove 1 is formed on the end face 4 of the housing flange and extends radially to the external guide groove 2. The bottom plane 5 of the end face confluence groove extends axially to the internal guide groove 3, so that the axial bottom surface 7 of the internal guide groove and the bottom plane 6 of the external guide groove are axially staggered. That is, the bottom plane 5 of the end face confluence groove and the bottom plane 6 of the external guide groove share the same plane reference and are axially staggered from the axial bottom surface 7 of the internal guide groove. This setting increases the depth of the internal guide groove and provides multiple internal guide grooves 3 and external guide grooves 2, so that the product is not affected by the installation direction and realizes the unidirectional discharge of internal condensate.

[0038] Furthermore, there are at least two internal and external guide channels 3 and 2. While the internal guide channel 3 discharges most of the condensate, the axial bottom surface 7 of the internal guide channel and the bottom plane 6 of the external guide channel are axially offset, forming a unique unidirectional fluid channel. That is, after the condensate inside the circulating pump drips and collects in the internal guide channel 3 under gravity, it can only be discharged to the end-face confluence channel 1 through the internal guide channel 3. The water stored in the end-face confluence channel 1 cannot flow back into the circulating pump, preventing external splashing water from directly flowing from the external guide channel 2 into the internal guide channel 3 and then into the circulating pump. Figure 6 As shown. The external conductive groove spacing L1 is symmetrically distributed with respect to the housing axis Y, and the internal conductive groove spacing L2 is symmetrically distributed with respect to the housing axis Y, with the external conductive groove spacing L1 being greater than the internal conductive groove spacing L2, as shown. Figure 5 As shown, the external guide channel, viewed from a top view, has a fan-shaped opening. The opening angle θ2 facing the housing axis O is greater than the opening angle θ1 facing the outside of the housing, forming a communicating vessel principle with two external guide channels symmetrical about the housing axis Y, thereby draining the water stored in the manifold immediately. In other words, this embodiment uses a communicating vessel structure with openings of different sizes inside and outside the external guide channel. This effectively drains internal condensate while preventing external splash water from entering the circulating pump through the guide channel, increasing the housing's protection against external splash water, reducing the risk of external impact, and greatly improving protection capabilities.

[0039] like Figure 7 As shown, the casing structure j has an arc surface 11 cut near the internal guide groove 3 for installing the iron core, and the arc surface is left with a height space for condensate drainage to avoid the formation of a liquid tension surface inside the casing.

[0040] Example 2

[0041] In a typical circulating pump installation, the pump head outlet is perpendicular to the horizontal plane and faces upwards, while the pump head inlet is perpendicular to the horizontal plane and faces downwards. When the circulating pump is transporting a heating medium and the external air is humid and its temperature is lower than the temperature of the internal armature winding of the circulating pump, condensation will form on the surface of the armature winding. Similarly, when the circulating pump is transporting a cooling medium and the external air is humid and its temperature is higher than the temperature of the internal armature winding of the circulating pump, condensation will also form on the surface of the armature winding. Therefore, it is necessary to guide the accumulated condensation to the outside of the casing in a timely manner.

[0042] like Figure 1 and Figure 2As shown, this utility model is a circulating pump with a casing, including a pump head a, a sealing ring b, an impeller c, a rotor support d, a rotor e, a shielding tank f, an armature winding g, a bolt i, a housing assembly j, and the casing structure h of Embodiment 1. The shielding tank f internally isolates the liquid in the inner cavity sealing surface a2 of the pump head a from contact with the armature winding g, while the casing structure h externally isolates the liquid from contact with the armature winding g. The shielding tank f has a flanged plane, and the casing flange end face 4 is flush with the second flanged plane f2 of the shielding tank. The first flanged plane f1 of the shielding tank f is fitted with the sealing ring b, and the flange plane b1 of the sealing ring b is flush with the inner cavity sealing surface a2 of the pump head a. The bolt i passes through the fastening through hole h1 of the casing flange end face 4 and is fastened to the threaded hole a1 of the pump head a, compressing the axial height of the sealing ring b, thereby achieving a seal between the water entering the inner cavity of the pump head and the external environment of the casing.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A circulating pump casing structure, which is installed on a circulating pump including a pump head (a), a seal ring (b), and a bolt (i), characterized by, The housing structure (j) includes an end face manifold (1), an external guide groove (2), an internal guide groove (3), and a housing flange end face (4); The bolt (i) passes through the end face (4) of the housing flange and is fastened to the pump head (a), and compresses the axial height of the sealing ring (b); the end face manifold (1) is formed on the end face (4) of the housing flange and extends radially to the outer guide groove (2); the bottom plane (5) of the end face manifold extends axially to the inner guide groove (3), so that the axial bottom surface (7) of the inner guide groove and the bottom plane (6) of the outer guide groove are axially staggered.

2. The casing structure of a circulating pump according to claim 1, wherein The external guide groove (2) has an asymmetrical opening structure.

3. The casing structure of a circulating pump according to claim 1, wherein The external guide groove (2) is provided in at least two parts and is symmetrically distributed based on the Y-axis of the housing structure.

4. The circulating pump casing structure according to claim 1, characterized in that, The opening angle θ2 of the external guide groove (2) near the axis O of the housing structure is greater than the opening angle θ1 away from the axis O of the housing structure.

5. The circulating pump casing structure according to claim 1, characterized in that, The internal guide groove (3) is provided in at least two parts and is symmetrically distributed based on the Y axis of the casing structure.

6. The casing structure of a circulating pump according to claim 1, wherein The spacing L1 of the external conductive grooves (2) on the same side is greater than the spacing L2 of the internal conductive grooves (3) on the same side.

7. The casing structure of a circulating pump according to claim 1, wherein The housing structure (j) has an arc surface (11) cut near the internal guide groove (3) for installing the iron core, and the arc surface is left with a height space for condensate drainage.

8. A circulating pump device with a casing structure, comprising a pump head (a), a sealing ring (b), a shielding tank (f), and bolts (i), characterized in that, The circulating pump device also includes the housing structure described in any one of claims 1-7.

9. The circulating pump apparatus of claim 8, wherein, The housing flange end face (4) is provided with a fastening through hole (h1), the pump head (a) is provided with a threaded hole (a1), and the bolt (i) passes through the fastening through hole (h1) of the housing flange end face (4) and is fastened to the threaded hole (a1) of the pump head (a).

10. The circulating pump apparatus of claim 8, wherein, The shielding tank (f) includes a first flanged plane (f1) and a second flanged plane (f2). The first flanged plane (f1) contacts the sealing ring (b), and the second flanged plane (f2) contacts the flange end face (4) of the housing.

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