Circulating pump case structure and circulating pump equipment with same

Abstract

The invention relates to a casing structure of a circulating pump and circulating pump equipment with the casing structure, the casing structure is mounted on the circulating pump, the circulating pump comprises a pump head, a sealing ring and a bolt, and the casing structure comprises an end face confluence groove, an external conduction groove, an internal conduction groove and a casing flange end face; the bolt penetrates through the flange end face of the machine shell and then is connected with the pump head in a fastened mode, and the axial height of the sealing ring is compressed. The end face confluence groove is formed in the end face of the shell flange and extends to the external conduction groove in the radial direction, and the bottom plane of the end face confluence groove extends to the internal conduction groove in the axial direction, so that the axial bottom face of the internal conduction groove and the bottom plane of the external conduction groove are arranged in a staggered mode in the axial direction. Compared with the prior art, the device has the advantages of preventing condensate water and external splashing at the same time and the like.

Description

Technical Field

[0001] The present invention relates to a circulating pump device, in particular to a circulating pump casing structure and a circulating pump device having the casing structure. Background Art

[0002] As the core power device of the liquid circulation system, the core function of the circulation pump is to continuously drive the fluid circulation through mechanical energy to achieve heat exchange, medium transmission or pressure maintenance. It is widely used in HVAC, industrial cooling, hot water supply, chemical processes and new energy (such as heat pumps, fuel cells) and other fields. Under certain usage conditions, changes in humidity or temperature may lead to the formation of condensation water, which can cause corrosion of internal components of the circulation pump, short circuits, etc., affecting the reliability and life of the pump. In addition, in the actual use environment of the circulation pump, accompanied by liquid splashing, if the casing is not adequately protected, water entering the circulation pump will also damage key components, causing corrosion of components, short circuits, etc., affecting the reliability and life of the pump. Therefore, the circulation pump casing needs to have a certain ability to prevent condensation and splashing water. However, the existing condensation-proof casings focus more on the condensation removal function, ignoring the pump casing's protection against external splashing water.

[0003] After searching Chinese patent publication number CN219452482U, a condensation water tank structure for a water pump motor seat was proposed. In this structure, the internal condensation water tank and the end condensation water tank (straight slot) are both connected to the drainage tank and share the same end face. The drainage efficiency of this method is highly dependent on the installation angle of the casing and the draft size. The casing with a complex internal structure may have dead corners or local depressions, so that the condensation water can still be retained inside. A smaller draft angle may cause the condensation water to accumulate in reverse, increasing the risk of corrosion. In addition, the drainage holes or guide grooves may become the intrusion path of external liquids (such as rainwater and flushing water), causing the most important protective function of the casing to fail.

[0004] Therefore, how to design a casing with a condensation-proof and splash-proof structure to achieve the effect of draining condensation water from the inside of the circulating pump and preventing splash water from entering from the outside, prevent corrosion of components, and thus extend the service life of the circulating pump has become a technical problem that needs to be solved. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a circulating pump casing structure that is resistant to both condensation water and external splashing water, and a circulating pump device having the casing structure.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to one aspect of the present invention, a circulating pump casing structure is provided, the casing structure being mounted on a circulating pump, the circulating pump comprising a pump head, a sealing ring, and bolts, the casing structure comprising an end face confluence groove, an external conducting groove, an internal conducting groove, and a casing flange end face;

[0008] The bolt passes through the end face of the casing flange and is fastened to the pump head, compressing the axial height of the sealing ring; the end face confluence groove is formed on the end face of the casing flange and radially extends to the external conducting groove, and the bottom plane of the end face confluence groove extends axially to the internal conducting groove, so that the axial bottom surface of the internal conducting groove and the bottom plane of the external conducting groove are axially staggered.

[0009] As a preferred technical solution, the external conducting groove is an asymmetric opening structure.

[0010] As a preferred technical solution, there are at least two external conducting grooves, which are symmetrically distributed based on the axis Y of the casing structure.

[0011] As a preferred technical solution, the opening angle θ2 of the external conducting groove close to the axis O of the casing structure is greater than the opening angle θ1 away from the axis O of the casing structure.

[0012] As a preferred technical solution, there are at least two internal conducting grooves, which are symmetrically distributed based on the axis Y of the casing structure.

[0013] As a preferred technical solution, the spacing L1 of the outer conducting grooves on the same side is greater than the spacing L2 of the inner conducting grooves on the same side.

[0014] As a preferred technical solution, an arc surface for installing the iron core is cut inside the casing structure near the internal conducting groove, and a height space is reserved at the cut arc for discharging condensed water.

[0015] According to another aspect of the present invention, a circulation pump device having a casing structure is provided, comprising a pump head, a sealing ring, a shielding tank and bolts, and the circulation pump device further comprises the casing structure.

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

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

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

[0019] 1) The present invention adopts an axially staggered arrangement of the axial bottom surface of the inner conducting groove and the bottom plane of the outer conducting groove, forming a unique one-way fluid channel, which prevents external splashing water from directly flowing from the outer conducting groove into the inner conducting groove and then invading the interior of the circulating pump from the inner conducting groove;

[0020] 2) The axial staggered arrangement of the present invention increases the depth of the internal conduction groove, and multiple internal and external conduction grooves are provided, so that the product is not affected by the installation direction and realizes the one-way discharge of internal condensed water;

[0021] 3) While the bottom surfaces of the inner and outer conducting grooves of the present invention are staggered, the outer conducting groove adopts a connector structure and openings of different sizes inside and outside. This effectively drains the internal condensed water while preventing external splashing water from invading the interior of the circulating pump through the conducting groove. This increases the housing's ability to prevent external splashing water, reduces the risk of external influence, and greatly improves the protection capability.

[0022] 4) The interior of the housing of the present invention has an arc-cut surface near the internal conducting groove for installing the iron core. The arc-cut surface leaves a high space for condensed water to be discharged, thereby avoiding the formation of a liquid tension surface inside the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the installation of the circulating pump of the present invention;

[0024] Figure 2 Schematic diagram of the exploded structure of the circulation pump of the present invention;

[0025] Figure 3 This is a schematic structural diagram of the sealing surface of the circulating pump of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the housing and the conducting slot of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the inner and outer conducting grooves of the present invention;

[0028] Figure 6 This is a schematic diagram of draining external splash water and internal condensed water according to the present invention;

[0029] Figure 7 It is a schematic diagram of the installation of the casing iron core of the present invention.

[0030] Where O is the water outlet, I is the water 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 casing structure, i is the bolt, and j is the casing 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 hole;

[0033] 1 is the end face conduit groove, 2 is the external conduction groove, 3 is the internal conduction groove, 4 is the end face of the casing flange, 5 is the bottom plane of the conduit groove, 6 is the bottom plane of the external conduction groove, 7 is the axial bottom surface of the internal conduction groove, 8 is the radial bottom surface of the internal conduction groove, 9 is the inward opening of the external conduction groove, 10 is the outward opening of the external conduction groove, 11 is the arc surface, 12 is the external splash water, 13 is the internal condensation water, 14 is the iron core, and H is the condensation water discharge height. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0035] Example 1

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

[0037] The internal conducting groove 3 has a specific draft angle. The end face conduit groove 1 is formed on the housing flange end face 4 and extends radially to the external conducting groove 2. The end face conduit groove bottom plane 5 extends axially to the internal conducting groove 3, resulting in an axial offset between the internal conducting groove axial bottom surface 7 and the external conducting groove bottom plane 6. That is, the end face conduit groove bottom plane 5 and the external conducting groove bottom plane 6 share a common planar reference and are axially offset from the internal conducting groove axial bottom surface 7. This arrangement increases the depth of the internal conducting groove. Furthermore, the provision of multiple internal conducting grooves 3 and external conducting grooves 2 ensures that the product is not affected by installation direction, achieving unidirectional drainage of internal condensate.

[0038] Furthermore, the internal conducting groove 3 and the external conducting groove 2 are provided with at least two. While the internal conducting groove 3 discharges most of the condensed water, the axial bottom surface 7 of the internal conducting groove and the axially staggered bottom plane 6 of the external conducting groove are arranged to form a unique one-way fluid channel. That is, after the condensed water inside the circulation pump drips and converges into the internal conducting groove 3 under the action of gravity, it can only be discharged to the end face confluence groove 1 through the internal conducting groove 3. The water stored in the end face confluence groove 1 cannot flow into the interior of the circulation pump in the opposite direction, thereby preventing external splashing water from directly flowing into the internal conducting groove 3 from the external conducting groove 2 and then invading the interior of the circulation pump from the internal conducting groove. Figure 6 The external conducting groove spacing L1 is symmetrically distributed relative to the housing axis Y, and the internal conducting groove spacing L2 is symmetrically distributed relative to the housing axis Y, and the external conducting groove spacing L1 is greater than the internal conducting groove spacing L2, as shown. Figure 5 As shown, the external conducting grooves have a fan-shaped opening when viewed from above. The opening angle θ2 facing the housing axis O is greater than the opening angle θ1 facing the exterior of the housing. This creates a connecting vessel principle with two external conducting grooves symmetrically about the housing axis Y, thereby immediately draining water from the confluence trough. Specifically, the external conducting grooves of this embodiment utilize a connecting vessel structure with openings of different sizes inside and outside. This effectively drains internal condensed water while preventing external splashing water from intruding into the circulation pump through the conducting grooves. This enhances the housing's ability to protect against external splashing, reduces the risk of external influences, and significantly improves its protection capabilities.

[0039] like Figure 7 As shown, the casing structure j has an arc surface 11 cut inside near the internal conducting groove 3 for installing the iron core, and a height space is left at the cut arc for condensed water to be discharged, so as to avoid the formation of a liquid tension surface inside the casing.

[0040] Example 2

[0041] In a typical circulating pump installation method, the water outlet of the pump head is perpendicular to the horizontal plane and upward, and the water inlet of the pump head is perpendicular to the horizontal plane and downward. When the circulating pump transports heating medium and the external air is humid and the temperature is lower than the temperature of the armature winding inside the circulating pump, condensation water will form on the surface of the armature winding. Similarly, when the circulating pump transports refrigerant medium and the external air is humid and the temperature is higher than the temperature of the armature winding inside the circulating pump, condensation water will also form on the surface of the armature winding. This requires that the accumulated condensation water be promptly diverted to the outside of the casing.

[0042] like Figure 1 and Figure 2As shown, the present invention includes a circulating pump with a casing, comprising a pump head a, a sealing ring b, an impeller c, a rotor support d, a rotor e, a shielding can f, an armature winding g, bolts i, a casing assembly j, and the casing structure h of Example 1. The shielding can f 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 isolates the liquid from contact with the armature winding g. The shielding can f has a flanged surface, and the casing flange end face 4 is flushly connected with the second flanged surface f2 of the shielding can. The first flanged surface f1 of the shielding can f is supported by a sealing ring b, and the flange surface b1 of the sealing ring b is flushly connected with the inner cavity sealing surface a2 of the pump head a. The bolts i pass through the fastening holes h1 of the casing flange end face 4 and are fastened to the threaded holes a1 of the pump head a, thereby compressing the axial height of the sealing ring b, thereby sealing the water in the pump head cavity from the external environment of the casing.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A circulating pump casing structure, wherein the casing structure (j) is mounted on a circulating pump, wherein the circulating pump comprises a pump head (a), a sealing ring (b) and bolts (i), and is characterized in that: The casing structure (j) comprises an end face confluence groove (1), an external conducting groove (2), an internal conducting groove (3) and a casing flange end face (4); The bolt (i) passes through the housing flange end face (4) and is fastened to the pump head (a), and compresses the axial height of the sealing ring (b); the end face confluence groove (1) is formed on the housing flange end face (4) and radially extends to the external conducting groove (2); the bottom plane (5) of the end face confluence groove axially extends to the internal conducting groove (3), so that the axial bottom surface (7) of the internal conducting groove and the bottom plane (6) of the external conducting groove are axially staggered.

2. A circulating pump casing structure according to claim 1, characterized in that: The external conducting groove (2) is an asymmetric opening structure.

3. A circulating pump casing structure according to claim 1, characterized in that: At least two external conducting grooves (2) are provided and are symmetrically distributed based on the axis Y of the casing structure.

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

5. A circulating pump casing structure according to claim 1, characterized in that: At least two internal conducting grooves (3) are provided and are symmetrically distributed based on the axis Y of the casing structure.

6. A circulating pump casing structure according to claim 1, characterized in that: The spacing L1 of the external conducting grooves (2) on the same side is greater than the spacing L2 of the internal conducting grooves (3) on the same side.

7. A circulating pump casing structure according to claim 1, characterized in that: An arc surface (11) for installing the iron core is cut inside the casing structure (j) near the internal conducting groove (3), and a height space is reserved at the cut arc for condensed water to be discharged.

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 further comprises a casing structure as described in any one of claims 1-7.

9. The circulating pump device according to claim 8, characterized in that: The casing 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 casing flange end face (4) and is fastened to the threaded hole (a1) of the pump head (a).

10. The circulating pump device according to claim 8, characterized in that: The shielding can (f) comprises a first flange plane (f1) and a second flange plane (f2), wherein the first flange plane (f1) contacts the sealing ring (b), and the second flange plane (f2) contacts the casing flange end surface (4).

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