Pump head structure of high-speed deep-well pump

Abstract

The utility model discloses a pump head structure of a high-speed deep-well pump. The pump head structure comprises a pump head shell, a pump cylinder, a water inlet joint and a pump shaft. The pump head shell is fixedly connected with the pump cylinder through a plurality of sets of side button locking structures, each side button locking structure comprises a connecting buckle sleeve, a screw, a first connecting hole and a second connecting hole, the first connecting hole and the second connecting hole are correspondingly formed in the outer side wall of the pump cylinder and the outer side wall of the pump head shell respectively, and the connecting buckle sleeve is arranged in the two connecting holes in a sleeved mode at the same time and forms transition fit. A screw penetrates through the connecting buckle sleeve and is screwed in the second connecting hole, and the screwed part of the screw and the second connecting hole is filled with thread glue; a center ring used for supporting the pump shaft is concentrically arranged in the pump head shell, a ceramic sleeve and a rubber sleeve are sequentially arranged between the pump shaft and the center ring in a sleeved mode, a plurality of sets of circumferential rotation stopping structures are arranged between the rubber sleeve and the center ring, and each circumferential rotation stopping structure comprises a rotation stopping groove formed in one of the center ring and the rubber sleeve and a rotation stopping protrusion correspondingly arranged on the other one of the center ring and the rubber sleeve. The structure not only solves the problems of looseness and screw breakage, but also ensures the coaxiality, and meets the use requirements of a high-speed pump.

Description

Technical Field

[0001] This utility model relates to the field of deep well pump technology, and in particular to a high-speed deep well pump head structure. Background Technology

[0002] The most distinctive feature of a deep well pump is that it integrates the electric motor and the pump into one unit. It is a type of pump that is immersed in a groundwater well to draw and transport water, and it is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment.

[0003] Existing deep well pump head structures include a pump head housing, pump barrel, inlet section, and pump shaft. The connection between the pump head housing and pump barrel typically employs either a suspended or threaded connection. The suspended connection involves a lifting bolt passing through the pump head housing from top to bottom and then threaded onto a pin inserted laterally into the pump barrel. However, this lifting bolt is prone to bending or breakage due to its excessive length. Both of these pump head structures are generally only suitable for low-speed pumps below 3000 RPM. At high-speed pump operation, problems such as poor coaxiality, unstable operation, and loose connections may occur. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a high-speed deep well pump head structure that not only solves the problems of loosening and broken screws, but also ensures coaxiality and firm connection, thus meeting the needs of high-speed pump use.

[0005] The technical solution of this utility model is:

[0006] The present invention relates to a high-speed deep well pump head structure, comprising a pump head housing, a pump barrel, an inlet section, and a pump shaft. The pump head housing and the pump barrel are fixedly connected by multiple sets of side-mounted button locking structures. Each side-mounted button locking structure includes a connecting sleeve, a screw, and a first connecting hole and a second connecting hole respectively located on the outer side wall of the pump barrel and the pump head housing. The connecting sleeve is simultaneously fitted into the first and second connecting holes to form a transition fit. The screw passes through the connecting sleeve and is screwed into the second connecting hole, with the screw joint filled with thread-locking adhesive.

[0007] The pump head housing is concentrically provided with a central ring for supporting the pump shaft. A ceramic sleeve and a rubber sleeve are sequentially sleeved between the pump shaft and the central ring. Multiple sets of circumferential anti-rotation structures are provided between the rubber sleeve and the central ring. The circumferential anti-rotation structure includes an anti-rotation groove provided on one of the central ring or the rubber sleeve and an anti-rotation protrusion provided on the other.

[0008] In the above structure, the present invention sets a concentric central ring, ceramic sleeve and rubber sleeve structure in the pump head housing to achieve the guiding and supporting function of the pump shaft, ensuring that it remains concentric with the water inlet section and meets the coaxiality requirements; at the same time, the connecting sleeve, screws and threaded adhesive are used to achieve a lateral and stable connection between the pump head housing and the pump barrel, which makes it less likely for the screws to loosen or break under high speed.

[0009] Furthermore, in the high-speed deep well pump head structure described in this utility model, there are four anti-rotation grooves that are recessed at intervals on the same side shaft end face of the central ring, and the corresponding anti-rotation protrusions are protruding on the outer peripheral wall of the rubber sleeve, and the anti-rotation protrusions are engaged in the anti-rotation grooves. The design of four anti-rotation grooves and anti-rotation protrusions enhances the connection stability and prevents relative rotation during high-speed operation.

[0010] Furthermore, in the high-speed deep well pump head structure described in this utility model, the second connecting hole is a stepped hole, including a large-diameter section that mates with the connecting sleeve and a small-diameter section that is threadedly connected to the screw.

[0011] Furthermore, in the high-speed deep well pump head structure described in this utility model, the pump head housing and the central ring are connected by multiple connecting spokes arranged at intervals along the circumference, and the pump head housing, central ring, and connecting spokes are integrally formed. By machining the pump head inside and out in a single process, internal and external coaxiality is ensured.

[0012] Furthermore, in the high-speed deep well pump head structure described in this utility model, the outer end of the connecting sleeve is bent to form a convex edge, and the convex edge abuts against the outer wall of the pump barrel.

[0013] Furthermore, in the high-speed deep well pump head structure described in this utility model, the ceramic sleeve is made of zirconium oxide.

[0014] Furthermore, in the high-speed deep well pump head structure described in this utility model, a check valve seat is also provided inside the pump head housing. A check valve that can slide axially relative to the check valve seat is provided on the check valve seat, and the two form a one-way sealing cooperation to prevent water backflow.

[0015] Furthermore, in the high-speed deep well pump head structure described in this utility model, O-rings are provided between the water inlet section and the pump barrel, and between the pump barrel and the pump head housing.

[0016] Furthermore, in the high-speed deep well pump head structure described in this utility model, the contact surface between the screw and the connecting sleeve adopts a conical surface fit to improve the connection stability.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model has both a concentric central ring support structure and a side button locking structure composed of connecting sleeves, screws, and threaded adhesive. The central ring, ceramic sleeve, and rubber sleeve effectively guide and support the pump shaft end, preventing pump shaft swaying, ensuring the coaxiality between the upper and lower sections of the deep well pump, and improving the connection stability between the pump head housing and the pump barrel. It is less prone to screw loosening or breakage, and meets the requirements of high-speed operation.

[0019] 2. This utility model achieves circumferential anti-rotation between the rubber sleeve and the central ring through the cooperation of multiple sets of anti-rotation grooves and anti-rotation protrusions. The structure is simple, stable and reliable, and effectively prevents the rubber sleeve from rotating circumferentially.

[0020] 3. This utility model adds a check valve seat structure inside the pump head housing and installs a corresponding one-way check valve to prevent water in the pipeline from flowing back and causing the impeller to reverse when the machine is stopped, thereby avoiding damage to the internal hydraulic components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the disassembled parts of this utility model.

[0022] Figure 2 This is a three-dimensional schematic diagram of the pump head housing described in this utility model.

[0023] Figure 3 This is a cross-sectional schematic diagram of the pump head housing described in this utility model.

[0024] Figure 4 This is a three-dimensional schematic diagram of the rubber sleeve described in this utility model. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings:

[0026] Reference Figure 1 , Figure 2 and Figure 3As shown in the figure, the high-speed deep well pump head structure of this embodiment includes a pump head housing 1, a pump barrel 2, an inlet section 3, and a pump shaft 4. The pump head housing 1 and the pump barrel 2 are fixedly connected by four sets of side button locking structures. The side button locking structures include connecting sleeves 6, screws 7, and first connecting holes 8 and second connecting holes 9 respectively provided on the outer walls of the pump barrel 2 and the pump head housing 1. The connecting sleeves 6 are simultaneously fitted into the first connecting holes 8 and the second connecting holes 9 to form a transition fit. The outer end of the connecting sleeves 6 is bent to form a protruding edge, which abuts against the outer wall of the pump barrel 2. The screws 7 pass through the connecting sleeves 6 and are screwed into the second connecting hole 9, and the screw joint is filled with threadlocker. The contact surface between the screws 7 and the connecting sleeves 6 adopts a tapered surface fit. Specifically, the second connecting hole 9 is a stepped hole, including a large-diameter section 9a that mates with the connecting sleeves 6 and a small-diameter section 9b that is threadedly connected to the screws 7. This structure utilizes the combination of connecting sleeve 6, screw 7, and thread-locking adhesive to achieve a side-locking connection between the pump head housing 1 and the pump barrel 2, ensuring that the threads do not loosen or the screws break when the motor rotates at high speed, resulting in a highly stable connection.

[0027] The pump head housing 1 is concentrically provided with a central ring 5 for supporting the pump shaft 4. The pump head housing 1 and the central ring 5 are connected by multiple circumferentially spaced connecting spokes 15. The pump head housing 1, the central ring 5, and the connecting spokes 15 are integrally formed. A ceramic sleeve 10 and a rubber sleeve 11 are sequentially fitted between the pump shaft 4 and the central ring 5. The ceramic sleeve 10 is made of zirconium oxide and is fixedly connected to the pump shaft 4. The ceramic sleeve 10 and the rubber sleeve 11 are circumferentially rotatable. Multiple sets of circumferential anti-rotation structures are provided between the rubber sleeve 11 and the central ring 5. The circumferential anti-rotation structure includes an anti-rotation groove 5a on one of the central ring 5 or the rubber sleeve 11 and an anti-rotation protrusion 11b on the other. Specifically, in this embodiment, there are four anti-rotation grooves 5a, which are recessed at intervals on the same side of the shaft end face of the central ring 5. The anti-rotation protrusions 11a are correspondingly protruded on the outer peripheral wall of the rubber sleeve 11 and are engaged in the anti-rotation grooves 5a. In the above structure, the central ring 5 is used to install a wear-resistant and corrosion-resistant rubber sleeve 10 inside, and then a zirconia ceramic sleeve 10 is installed to guide and support the pump shaft 4, ensuring that the pump head and the water inlet section 3 are concentric and ensuring coaxiality.

[0028] O-rings 14 are provided between the water inlet section 3 and the pump cylinder 2, and between the pump cylinder 2 and the pump head housing 1, to improve the sealing and waterproofing of the connection.

[0029] The pump head housing 1 is also provided with a check valve seat 12, and a check valve 13 is provided on the check valve seat 12 that can slide axially relative to the check valve seat 12, and the two form a one-way sealing cooperation to effectively prevent water backflow.

[0030] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model are still covered by the claims of this utility model.

Claims

1. A high-speed deep well pump head structure, comprising a pump head housing, a pump barrel, an inlet section, and a pump shaft, characterized in that: The pump head housing and the pump barrel are fixedly connected by multiple sets of side button locking structures. The side button locking structure includes a connecting sleeve, a screw, and a first connecting hole and a second connecting hole respectively provided on the outer side wall of the pump barrel and the pump head housing. The connecting sleeve is simultaneously fitted into the first connecting hole and the second connecting hole to form a transition fit. The screw passes through the connecting sleeve and is screwed into the second connecting hole, and the screw joint is filled with thread adhesive. The pump head housing is concentrically provided with a central ring for supporting the pump shaft. A ceramic sleeve and a rubber sleeve are sequentially sleeved between the pump shaft and the central ring. Multiple sets of circumferential anti-rotation structures are provided between the rubber sleeve and the central ring. The circumferential anti-rotation structure includes an anti-rotation groove provided on one of the central ring or the rubber sleeve and an anti-rotation protrusion provided on the other.

2. The high-speed deep well pump head structure according to claim 1, characterized in that: The anti-rotation grooves are four in number and are recessed at intervals on the same side end face of the central ring shaft. The anti-rotation protrusions are correspondingly protruded on the outer peripheral wall of the rubber sleeve and are engaged in the anti-rotation grooves.

3. The high-speed deep well pump head structure according to claim 1, characterized in that: The second connecting hole is a stepped hole, including a large-diameter section that mates with the connecting sleeve and a small-diameter section that is threadedly connected to the screw.

4. The high-speed deep well pump head structure according to claim 1, characterized in that: The pump head housing and the central ring are connected by multiple connecting spokes arranged circumferentially, and the pump head housing, the central ring, and the connecting spokes are integrally formed.

5. The high-speed deep well pump head structure according to claim 1, characterized in that: The outer end of the connecting sleeve is bent to form a protruding edge, which abuts against the outer wall of the pump cylinder.

6. The high-speed deep well pump head structure according to claim 1, characterized in that: The ceramic sleeve is made of zirconium oxide.

7. The high-speed deep well pump head structure according to claim 1, characterized in that: The pump head housing is also provided with a check valve seat, and the check valve seat is provided with a check valve that can slide axially relative to the check valve seat, and the two form a one-way sealing cooperation.

8. The high-speed deep well pump head structure according to claim 1, characterized in that: O-rings are provided between the water inlet section and the pump cylinder, and between the pump cylinder and the pump head housing.

9. The high-speed deep well pump head structure according to claim 1, characterized in that: The contact surfaces of the screw and the connecting sleeve are tapered.

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