Pump sleeve and water pump using same

Abstract

The utility model relates to a pump sleeve and a water pump using the same, which solve the problems that the pump sleeve and an impeller string are abraded or blocked by silt and are difficult to disassemble and the like in the prior art, and adopt the technical scheme that the pump sleeve comprises a sleeve and a connecting sleeve which is at least arranged on the inner wall of one end of the sleeve, and the sleeve and the connecting sleeve are of a split structure; the inner diameter of the sleeve is larger than that of the connecting sleeve, and the inner wall of the connecting sleeve is a connecting part used for being connected with a fastener. The multi-assembly type detachable pump sleeve has the advantages that the sleeve and the connecting sleeve are adopted to form the multi-assembly type detachable pump sleeve, the wall thickness of the corresponding end of the pump sleeve is large, high strength is achieved, the connection reliability is guaranteed, a larger gap is formed between the middle area of the pump sleeve and the impeller string and the pump, disassembly and maintenance are convenient, and the service life of the pump sleeve is prolonged. The service life of the water pump is prolonged, and the use cost of the water pump is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water pumps, and in particular to a pump sleeve and a water pump using the same. Background Technology

[0002] To transport water from deeper depths, water pumps (or well pumps) often incorporate impeller strings consisting of multi-stage impeller assemblies, housed within a relatively long pump sleeve. For ease of manufacturing, the pump sleeve is initially formed as a single piece (e.g., extrusion molding), and then threaded connections are machined directly at both ends. Because the central region outside both ends of the pump sleeve (the area that mates with the impeller string sidewalls) is difficult to machine and remains in its extrusion-molded state, while the inner diameter of the pump sleeve changes during threading at both ends, typically becoming larger at the ends than in the central region, this results in a smaller clearance between the pump sleeve and the impeller string.

[0003] When the impeller string needs to be removed for maintenance of the well pump, due to its considerable length, and the fact that after prolonged use, impurities such as mud and sand can easily enter the gap between the impeller string and the pump sleeve, these impurities can cause friction between the impeller string and the pump sleeve, damaging their integrity and the size of the gap, thus affecting the pump's efficiency. Furthermore, these impurities can cause the impeller string and pump sleeve to jam, making disassembly and maintenance impossible and rendering the pump unusable, reducing its lifespan and increasing operating costs. Summary of the Invention

[0004] The purpose of this utility model is to solve the above-mentioned problems existing in the prior art by providing a pump sleeve and a water pump using the same. The pump sleeve is a multi-component, detachable pump sleeve formed by using a sleeve and connecting sleeves set at both ends of the sleeve. The pump sleeve has thicker walls at both ends and higher strength, which helps to ensure the reliability of the connection with fasteners (including the inlet section and the discharge chamber). The pump sleeve has thinner walls in the middle area where the impeller string is housed, which in turn creates a larger gap between the impeller string and the inner wall of the pump sleeve. This prevents mud and sand from getting stuck between the outer wall of the impeller string and the inner wall of the pump sleeve, reduces the possibility of mud and sand abrading the outer wall of the impeller string and the inner wall of the pump sleeve, and prevents mud and sand from jamming the impeller string and the pump sleeve. It also facilitates disassembly and maintenance, thereby improving the service life of the water pump and reducing the operating cost of the water pump.

[0005] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a pump sleeve, characterized in that it includes a sleeve and a connecting sleeve disposed on the inner wall of at least one end of the sleeve. The sleeve and the connecting sleeve are separate structures. The inner diameter of the sleeve is larger than the inner diameter of the connecting sleeve. The inner wall of the connecting sleeve is a connecting part used for connecting fasteners. The use of a sleeve and a connecting sleeve to form a multi-component, detachable pump sleeve (with a connecting sleeve disposed at one end of the sleeve or at both ends of the sleeve) results in a thicker wall at the corresponding ends of the pump sleeve, providing higher strength and ensuring reliable connection with fasteners. Furthermore, the wall thickness in the middle region of the pump sleeve accommodating the impeller string is thinner, resulting in a larger gap between the impeller string and the inner wall of the pump sleeve. This prevents silt and sand from getting stuck between the outer wall of the impeller string and the inner wall of the pump sleeve, reducing the possibility of silt and sand abrading the outer wall of the impeller string and the inner wall of the pump sleeve. It also prevents silt and sand from jamming the impeller string and the pump sleeve, facilitating disassembly and maintenance, thereby improving the service life of the pump and reducing its operating costs.

[0006] As a further improvement and supplement to the above technical solution, this utility model adopts the following technical measures: a positioning structure is provided between the connecting sleeve and the sleeve. The positioning structure includes a positioning protrusion and a positioning groove respectively disposed on the connecting sleeve and the sleeve, and the positioning protrusion and the positioning groove are inserted and positioned together. The setting of the positioning structure is beneficial to improving the assembly reliability and efficiency between the connecting sleeve and the sleeve, and at the same time, it is beneficial to improve the torsional resistance after the connection between the connecting sleeve, the sleeve and the fasteners, thereby ensuring the reliability of the pump sleeve involved in this technical solution.

[0007] Preferably, the inner wall of the connecting sleeve is provided with a threaded structure for connecting with the corresponding fastener.

[0008] Preferably, the connecting sleeve and the sleeve are fixed by roll welding. The inner wall of the connecting sleeve has threads, which are used to form a connection with the corresponding fasteners. Since gaps are prone to exist at the overlapping part between the connecting sleeve and the sleeve, roll welding is preferred. During roll welding, the gaps are eliminated by the ductility of the connecting sleeve or the sleeve itself. Furthermore, the connecting sleeve is respectively set at the ends of the sleeve, so that the two ends of the pump sleeve have a more suitable wall thickness to ensure the reliability of the connection with the fasteners. This significantly reduces the wall thickness of the sleeve compared to the existing pump sleeve wall thickness, increases the distance between the outer wall of the impeller string and the inner wall of the sleeve, reduces or even avoids the accumulation of mud and sand, and also saves material consumption, which is conducive to energy conservation, emission reduction, and cost reduction. In addition, to ensure the thread machining accuracy, after roll welding, the threads are precision machined on the inner wall of the connecting sleeve by machining.

[0009] Preferably, the overlapping portion of the connecting sleeve and the sleeve is provided with an axially penetrating mounting hole. A connector that mates with the mounting hole connects the connecting sleeve to a corresponding fastener. This technical solution is a first method for connecting the pump sleeve to a fastener. The connecting sleeve completely overlaps the sleeve along its length, with the outer end of the connecting sleeve flush with the outer end of the sleeve. The fastener is fixed by a connector axially inserted into the mounting hole, ensuring a stable fit between the connecting sleeve and the sleeve and preventing axial displacement, thereby ensuring the reliability of the pump sleeve.

[0010] Preferably, the outer wall of the connecting sleeve is provided with an insertion recess, and the outer end of the sleeve is inserted into the insertion recess to form an insertion nesting fit with the connecting sleeve. This technical solution is a second technical solution for connecting the pump sleeve and the fastener. The outer wall thickness of the connecting sleeve is greater than the inner wall thickness. An insertion recess is formed on the outer wall of the inner end of the connecting sleeve. The inner end of the connecting sleeve and the outer end of the sleeve are stacked and inserted into each other. The wall thickness of the inner end of the connecting sleeve is supplemented by the wall thickness of the outer end of the sleeve.

[0011] Preferably, the outer end of the connecting sleeve is provided with an outwardly turned hook structure. The hook structure has a hook groove, the opening of which faces the other end of the sleeve. The corresponding end of the sleeve is inserted into the hook groove to form a hook-and-loop fit. This technical solution is a third technical solution for connecting the pump sleeve and the fastener, which increases the reliability of the fixed fit between the connecting sleeve and the sleeve through the hook structure.

[0012] Preferably, the outer end of the sleeve is provided with an inner folding ring, and the outer end of the connecting sleeve abuts against the inner wall of the inner folding ring, thereby restricting the axial outward movement of the connecting sleeve. This technical solution is a fourth technical solution for connecting the pump sleeve and the fastener. By using the inner folding ring to abut against the outer end of the connecting sleeve, the situation where the connecting sleeve moves outward due to the axial force of the fastener is avoided.

[0013] The technical solution of the second technical subject of this utility model is as follows: a water pump, including a pump sleeve, an impeller string disposed within the pump sleeve, and fasteners respectively disposed at both ends of the pump sleeve, characterized in that the pump sleeve is the aforementioned pump sleeve, the impeller string is disposed in the inner cavity of the sleeve, the two ends of the impeller string are respectively adapted to the inner ends of two connecting sleeves, the connecting parts of the fasteners are respectively inserted into the inner cavities of the two connecting sleeves and respectively form a detachable fixed connection with the corresponding connecting sleeves, and the fasteners are respectively disposed on the outer sides of both ends of the impeller string.

[0014] Preferably, the gap between the inner wall of the sleeve and the outer wall of the impeller string is 'a', where 1mm < a < 3mm, and the gap between the connecting sleeve and the outer wall of the impeller string is 'b', where 1mm < b < 3mm. The range of values ​​for gaps 'a' and 'b' is beneficial for ensuring the pump's working efficiency, preventing sediment buildup between the pump sleeve and the impeller string, facilitating disassembly and maintenance, extending the pump's service life, and reducing operating costs.

[0015] The beneficial effects of this utility model are as follows: 1. The multi-component, detachable pump sleeve is formed by using a sleeve connection method. This results in thicker walls at the corresponding ends of the pump sleeve, providing higher strength and ensuring reliable connection with fasteners. The wall thickness in the middle region of the pump sleeve, which accommodates the impeller string, is thinner, creating a larger gap between the impeller string and the inner wall of the pump sleeve. This prevents silt from getting stuck between the outer wall of the impeller string and the inner wall of the pump sleeve, reducing the possibility of silt abrasion on both surfaces and preventing jamming. This facilitates disassembly and maintenance, thereby extending the pump's service life and reducing operating costs. 2. The use of roll forming welding eliminates the gap between the connecting sleeve and the sleeve, improving fixing strength and ensuring reliable operation of the pump sleeve after application. Simultaneously, the roll forming process creates threads, improving the processing efficiency of the pump sleeve. 3. Multiple fit options are available between the connecting sleeve and the sleeve, facilitating practical applications and expanding the applicability range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first structure of the pump sleeve involved in this utility model.

[0017] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure.

[0018] Figure 3 This is a schematic diagram of the second structure of the pump sleeve (with a positioning structure) involved in this utility model.

[0019] Figure 4 This is a schematic diagram of the third structure of the pump sleeve (connecting sleeve and sleeve partially stacked) involved in this utility model.

[0020] Figure 5 This is a schematic diagram of the fourth structure of the pump sleeve (with a hook structure) involved in this utility model.

[0021] Figure 6 This is a schematic diagram of the fifth structure of the pump sleeve (with an inner folding ring) involved in this utility model.

[0022] Figure 7 This is a schematic diagram of the sixth structure of the pump sleeve (which has mounting holes and the connecting sleeve and the sleeve are completely stacked) involved in this utility model.

[0023] Figure 8 This is a schematic diagram of the seventh structure of the pump sleeve (which has mounting holes and the connecting sleeve and the sleeve are partially stacked) involved in this utility model.

[0024] Figure 9 This is a schematic diagram of the structure of a water pump involved in this utility model.

[0025] Figure 10 yes Figure 9 Enlarged structural diagram of section A in the middle.

[0026] In the diagram: 1. Sleeve; 2. Connecting sleeve; 3. Positioning protrusion; 4. Positioning groove; 5. Mounting hole; 6. Hook structure; 7. Hook groove; 8. Inner folding ring; 9. Impeller string; 10. Insertion recessed ring; 11. Fastener. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0028] Example: Figures 1-8 As shown, a pump sleeve includes a sleeve 1 and a connecting sleeve 2 disposed on the inner wall of at least one end of the sleeve 1. The sleeve 1 and the connecting sleeve 2 are separate structures. The inner diameter of the sleeve 1 is larger than the inner diameter of the connecting sleeve 2. The inner wall of the connecting sleeve 2 is a connecting part for connecting fasteners 11.

[0029] In this technical solution, a multi-component, detachable pump sleeve is formed by using a sleeve 1 and a connecting sleeve 2 (a connecting sleeve is provided at one end of the sleeve or at both ends of the sleeve; in this embodiment, the technical solution of providing connecting sleeves at both ends of the sleeve is preferred). This makes the wall thickness of the corresponding ends of the pump sleeve thicker and stronger, which helps to ensure the reliability of the connection with the fastener 11. It also makes the wall thickness of the middle region of the pump sleeve that accommodates the impeller string 9 thinner, thereby creating a larger gap between the impeller string 9 and the inner wall of the pump sleeve. This prevents mud and sand from getting stuck between the outer wall of the impeller string 9 and the inner wall of the pump sleeve, reducing the possibility of mud and sand abrading the outer wall of the impeller string 9 and the inner wall of the pump sleeve, preventing mud and sand from jamming the impeller string 9 and the pump sleeve, facilitating disassembly and maintenance, and thus helping to improve the service life of the water pump and reduce the operating cost of the water pump.

[0030] In this technical solution, the fastener 11 may include an inlet section and a discharge chamber, which are respectively disposed at both ends of the pump sleeve.

[0031] Next, the above technical solution will be further elaborated as follows:

[0032] In practical applications, such as Figure 3As shown, a positioning structure is provided between the connecting sleeve 2 and the sleeve 1. The positioning structure includes a positioning protrusion 3 and a positioning groove 4 respectively provided on the connecting sleeve 2 and the sleeve 1. The positioning protrusion 3 and the positioning groove 4 are inserted and positioned together.

[0033] In this technical solution, the positioning structure is designed to improve the reliability and efficiency of the assembly between the connecting sleeve 2 and the sleeve 1, and also to improve the torsional resistance of the connecting sleeve 2, the sleeve 1, and the fastener 11 after connection, thereby ensuring the reliability of the pump sleeve involved in this technical solution.

[0034] In practical applications, the inner wall of the connecting sleeve 2 is provided with a threaded structure for connecting with the corresponding fastener 11.

[0035] Or, in practical applications, such as Figure 7 or Figure 8 As shown, an axially penetrating mounting hole 5 is provided at the overlapping part of the connecting sleeve 2 and the sleeve 1, and the connecting sleeve 2 is connected to the corresponding fastener 11 by a connector that mates with the mounting hole 5.

[0036] In practical applications, the connecting sleeve 2 and the sleeve 1 are fixed by roll welding. The inner wall of the connecting sleeve 2 has threads, which are used to form a connection with the corresponding fastener 11.

[0037] In this technical solution, since gaps are prone to exist at the overlapping part between the connecting sleeve 2 and the sleeve 1, roll welding is preferably adopted. During roll welding, the gaps are eliminated by the ductility of the connecting sleeve 2 or the sleeve 1 itself. Furthermore, the connecting sleeve 2 is respectively located at the ends of the sleeve 1, so that the two ends of the pump sleeve have a more suitable wall thickness to ensure the reliability of the connection with the fastener 11. The wall thickness of the sleeve 1 is significantly reduced compared to the existing pump sleeve wall thickness, increasing the distance between the outer wall of the impeller string 9 and the inner wall of the sleeve 1, reducing or even avoiding the accumulation of mud and sand. At the same time, it also saves material consumption, which is conducive to energy conservation, emission reduction and cost reduction. In addition, in order to ensure the thread processing accuracy, after the roll welding is completed, the threads are precision machined on the inner wall of the connecting sleeve 2 by machining.

[0038] In practical applications, the first technical solution for connecting the pump sleeve and the fastener 11 is as follows: the connecting sleeve 2 and the sleeve 1 are completely overlapped, such as... Figures 1-3 As shown.

[0039] In this technical solution, the connecting sleeve 2 is completely overlapped with the sleeve 1 in the length direction, and the outer end of the connecting sleeve 2 is flush with the outer end of the sleeve 1. The fastener 11 is fixed by the connector of the axial insertion mounting hole 5, so that the connecting sleeve 2 and the sleeve 1 can be stably matched, avoiding axial displacement, thereby ensuring the reliability of the pump sleeve.

[0040] In practical applications, a second technical solution for connecting the pump sleeve and fastener 11 is as follows: the outer wall of the connecting sleeve 2 is provided with an insertion recess 10, and the outer end of the sleeve 1 is inserted into the insertion recess 10 to form an insertion and nesting fit with the connecting sleeve 2, such as... Figure 4 As shown.

[0041] In this technical solution, the outer wall thickness of the connecting sleeve 2 is greater than the inner wall thickness. An insertion recess 10 is formed on the outer wall of the inner end of the connecting sleeve 2. The inner end of the connecting sleeve 2 and the outer end of the sleeve 1 are stacked and inserted into each other. The wall thickness of the inner end of the connecting sleeve 2 is supplemented by the wall thickness of the outer end of the sleeve 1.

[0042] In practical applications, a third technical solution for connecting the pump sleeve and fastener 11 is as follows: the outer end of the connecting sleeve 2 is provided with an outwardly turned hook structure 6, the hook structure 6 having a hook groove 7, the opening of the hook groove 7 facing the other end of the sleeve 1, and the corresponding end of the sleeve 1 being inserted into the hook groove 7 to form a hook-and-loop engagement, such as... Figure 5 As shown.

[0043] In this technical solution, the hook and buckle structure 6 increases the reliability of the fixed fit between the connecting sleeve 2 and the sleeve 1.

[0044] In practical applications, a fourth technical solution for connecting the pump sleeve and fastener 11 is as follows: An inner folding ring 8 is provided at the outer end of the sleeve 1, and the outer end of the connecting sleeve 2 abuts against the inner wall of the inner folding ring 8. The inner folding ring 8 restricts the axial outward movement of the connecting sleeve 2. Figure 6 As shown.

[0045] In this technical solution, the inner folding ring 8 abuts against the outer end of the connecting sleeve 2 to prevent the connecting sleeve 2 from moving outward due to the axial force of the fastener 11.

[0046] Example 2: Figure 9 and Figure 10 As shown, the technical solution of the second technical subject matter involved in this utility model is as follows:

[0047] A water pump includes a pump sleeve, an impeller string 9 disposed within the pump sleeve, and fasteners 11 disposed at both ends of the pump sleeve.

[0048] The difference between this technical solution and the prior art is that: the pump sleeve is the pump sleeve described in Embodiment 1, the impeller string 9 is disposed in the inner cavity of the sleeve 1, the two ends of the impeller string 9 are respectively adapted to the inner ends of the two connecting sleeves 2, the connecting parts of the fasteners 11 are respectively inserted into the inner cavities of the two connecting sleeves 2 and respectively form a detachable fixed connection with the corresponding connecting sleeves 2, and the fasteners 11 are respectively disposed on the outer sides of the two ends of the impeller string 9.

[0049] In practical applications, the gap between the inner wall of the sleeve 1 and the outer wall of the impeller string 9 is a, where 1mm < a < 3mm, and the gap between the connecting sleeve 2 and the outer wall of the impeller string 9 is b, where 1mm < b < 3mm.

[0050] In this technical solution, the gap a is preferably 1 mm, 1.3 mm, 1.5 mm, 2 mm, or 2.5 mm, and the gap b is preferably 0.5 mm, 0.7 mm, or 0.8 mm.

[0051] In this technical solution, the range of values ​​for gaps a and b is beneficial to ensuring the working efficiency of the water pump, preventing the accumulation of mud and sand between the pump sleeve and the impeller string 9, facilitating disassembly and maintenance, improving the service life of the water pump, and reducing the operating cost of the water pump.

[0052] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pump sleeve, characterized in that... Includes a sleeve (1) and a connecting sleeve (2) disposed on the inner wall of at least one end of the sleeve (1). The sleeve (1) and the connecting sleeve (2) are separate structures. The inner diameter of the sleeve (1) is larger than the inner diameter of the connecting sleeve (2). The inner wall of the connecting sleeve (2) is a connecting part used to connect fasteners (11).

2. The pump sleeve according to claim 1, characterized in that... A positioning structure is provided between the connecting sleeve (2) and the sleeve (1). The positioning structure includes a positioning protrusion (3) and a positioning groove (4) respectively provided on the connecting sleeve (2) and the sleeve (1). The positioning protrusion (3) and the positioning groove (4) are inserted and positioned together.

3. The pump sleeve according to claim 1, characterized in that... The inner wall of the connecting sleeve (2) is provided with a threaded structure for connecting with the corresponding fastener (11).

4. The pump sleeve according to claim 3, characterized in that... The connecting sleeve (2) and the sleeve (1) are fixed by roll welding. The inner wall of the connecting sleeve (2) has threads, which are connected to the corresponding fastener (11) through the threads.

5. The pump sleeve according to claim 1, characterized in that... The overlapping part of the connecting sleeve (2) and the sleeve (1) is provided with an axially penetrating mounting hole (5), and the connecting sleeve (2) is connected to the corresponding fastener (11) by a connector that mates with the mounting hole (5).

6. The pump sleeve according to any one of claims 1-5, characterized in that... The outer wall of the connecting sleeve (2) is provided with a insertion recess (10), and the outer end of the sleeve (1) is inserted into the insertion recess (10) to form an insertion nesting fit with the connecting sleeve (2).

7. The pump sleeve according to any one of claims 1-5, characterized in that... The outer end of the connecting sleeve (2) is provided with an outward-turned hook structure (6), the hook structure (6) has a hook groove (7), the opening of the hook groove (7) faces the other end of the sleeve (1), and the corresponding end of the sleeve (1) is inserted into the hook groove (7) to form a hook-and-loop engagement.

8. The pump sleeve according to any one of claims 1-5, characterized in that... The outer end of the sleeve (1) is provided with an inner folding ring (8), and the outer end of the connecting sleeve (2) abuts against the inner wall of the inner folding ring (8). The inner folding ring (8) restricts the axial outward movement of the connecting sleeve (2).

9. A water pump, comprising a pump sleeve, an impeller string (9) disposed within the pump sleeve, and fasteners (11) respectively disposed at both ends of the pump sleeve, characterized in that... The pump sleeve is the pump sleeve according to any one of claims 1-8. The impeller string (9) is disposed in the inner cavity of the sleeve (1). The two ends of the impeller string (9) are respectively adapted to the inner ends of the two connecting sleeves (2). The connecting parts of the fasteners (11) are respectively inserted into the inner cavities of the two connecting sleeves (2) and respectively form a detachable fixed connection with the corresponding connecting sleeves (2). The fasteners (11) are respectively disposed on the outer sides of the two ends of the impeller string (9).

10. The water pump according to claim 9, characterized in that... The gap between the inner wall of the sleeve (1) and the outer wall of the impeller string (9) is a, 1mm < a < 3mm, and the gap between the connecting sleeve (2) and the outer wall of the impeller string (9) is b, 0.5mm < b < 1mm.

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