Die for manufacturing flow guide shell for deep-well pump

Abstract

The utility model relates to a die for manufacturing a flow guide shell for a deep-well pump, which is used for attaching rubber to the inner wall of the flow guide shell in a heat vulcanization bonding mode, the whole flow guide shell is annular, and the die comprises a lower die body and an upper die body which can move relatively in the vertical direction, the top of the lower die body is provided with an extrusion cavity which is provided with an upper opening and is used for placing a flow guide shell, the bottom of the upper die body is provided with a convex die which extends downwards, the convex die can correspondingly extend into an inner cavity of the flow guide shell which is placed in place in the extrusion cavity, and an annular gap is formed between the outer peripheral wall of the convex die and the inner peripheral wall of the flow guide shell. According to the mold, the rubber part can be well arranged on the inner wall of the flow guide shell, and the stability and firmness of the rubber part attached to the inner wall of the flow guide shell are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of deep well pumps, in particular to a mold for manufacturing a guide shell for a deep well pump. Background Art

[0002] The existing deep well pump includes a multi-section impeller assembly arranged in a guide shell, and each section of the impeller assembly includes an impeller, a guide vane matched with the impeller, and a cover plate matched with the guide vane. Since the well water in the actual use environment of the deep well pump often contains sediment, the sediment contained in the water flow pumped into the deep well pump will drive the water flow to continuously impact and rub the guide shell as the impeller rotates. After the pump has been running for a long time, the part of the guide shell that matches the impeller is easy to wear through, and even cause the guide shell to rupture. After the guide shell is worn through, the working efficiency of the pump is affected. If the guide shell ruptures, the entire pump cannot work normally and fails.

[0003] In order to solve the above technical problems, the Chinese utility model patent application with application number CN201920447977.6 discloses a guide shell and well pump with improved structure, wherein the inner wall of the guide shell body is provided with an insert, the insert is made of rubber material, the insert cooperates with the impeller assembly cavity, the shape of the insert is adapted to the shape of the inner wall of the corresponding part of the guide shell body, the insert has the characteristic of wear resistance, when the insert is damaged by the impact of mud and sand, the insert can be replaced in time, the guide shell can be prevented from being impacted and worn, the service life of the guide shell is improved, and the pump is prevented from being damaged by the guide shell and affecting the working efficiency or failing to work normally. However, since the rubber parts are arranged on the inner wall of the guide shell, and the internal operating space of the guide shell is limited, how to better arrange the rubber parts on the inner wall of the guide shell and ensure the stability and reliability of its attachment to the inner wall of the guide shell has become a technical problem to be solved urgently by personnel in this technical field. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a mold for manufacturing a guide shell for a deep well pump, which can better arrange the rubber part on the inner wall of the guide shell and ensure its stable and reliable attachment to the inner wall of the guide shell.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a mold for manufacturing a guide shell for a deep well pump, which is used to attach rubber to the inner wall of the guide shell by hot vulcanization bonding. The guide shell is annular as a whole. The mold includes a lower mold body and an upper mold body that can move relatively in the up and down directions. The top of the lower mold body has an extrusion chamber that is open at the top and is used to place the guide shell. The bottom of the upper mold body has a downwardly extending punch, which can extend into the inner cavity of the guide shell placed in place in the extrusion chamber. An annular gap is provided between the outer peripheral wall of the punch and the inner peripheral wall of the guide shell.

[0006] In order to accurately position the guide shell in the extrusion chamber, the shape of the extrusion chamber is adapted to the shape of the guide shell, and the outer peripheral wall of the guide shell in the extrusion chamber is abutted against the inner peripheral wall of the extrusion chamber.

[0007] Considering that in some cases the rubber piece attached to the guide shell needs to be arranged in the middle area away from the upper and lower ends of the guide shell, for this purpose, the guide shell has an upper port and a lower port that are opposite to each other, and the bottom wall of the extrusion chamber has a first slot for the lower end of the guide shell to be inserted into. After the lower end of the guide shell is inserted into the first slot, the rubber will not be attached to the end position of the guide shell during the extrusion flow process.

[0008] In order to facilitate the removal of the guide shell from the lower mold body, the upper end of the guide shell placed in place in the extrusion chamber is higher than the top surface of the main body of the lower mold body, and the main body of the upper mold body corresponds to the area located on the periphery of the punch and has a second slot for the upper end of the guide shell to be inserted into.

[0009] In order to ensure the stability of the relative movement of the upper and lower mold bodies, the lower mold body is provided with a guide column extending upward, and the upper mold body is provided with a guide sleeve for the guide column to slide through.

[0010] In order to further ensure the stability of the relative movement of the upper and lower mold bodies, the lower mold body and the upper mold body are generally cube-shaped, and there are multiple guide pillars, which are respectively arranged at the four corners of the lower mold body, and there are also multiple guide sleeves, which are respectively arranged at the four corners of the upper mold body.

[0011] In order to improve the production efficiency of the guide shell, the top of the lower mold body has at least two extrusion chambers, and correspondingly, the bottom of the upper mold body has at least two punches.

[0012] Compared with the prior art, the utility model has the following advantages: the utility model is used for manufacturing a guide shell for a deep well pump, and the mold comprises an upper mold body and a lower mold body, wherein, after the guide shell is placed in the extrusion chamber of the lower mold body, the punch of the upper mold can be extended into the inner cavity of the guide shell placed in place in the extrusion chamber, and the rubber is hot-vulcanized and extruded. The rubber is heated and can enter the annular gap between the outer wall of the punch and the inner wall of the guide shell, and then bonded to the inner wall of the guide shell. The mold can better set the rubber part on the inner wall of the guide shell and ensure its stability and reliability attached to the inner wall of the guide shell. In addition, the use of the mold can ensure the shape and dimensional accuracy of the rubber coating, and the mold design can be customized according to specific needs to meet different application scenarios and performance requirements. The vulcanization process combined with the use of the mold can also realize mass production and automated production, which greatly improves production efficiency and reduces production costs. Vulcanized rubber has better physical and chemical properties, such as wear resistance, corrosion resistance, high temperature resistance, etc., which enables vulcanized rubber coated metal parts to maintain good working performance even in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the three-dimensional structure of a mold according to an embodiment of the utility model;

[0014] Figure 2 An exploded view of a mold of an embodiment of the utility model (showing a guide shell);

[0015] Figure 3 A cross-sectional view of a mold of an embodiment of the utility model (showing a guide shell);

[0016] Figure 4 This is an exploded view of the mold of the embodiment of the utility model after cutting;

[0017] Figure 5 A cross-sectional view of a mold of an embodiment of the utility model (showing the process of the upper mold body moving downward to apply pressure to the rubber in the lower mold body);

[0018] Figure 6 It is a three-dimensional structural schematic diagram of the guide shell structure of an embodiment of the utility model;

[0019] Figure 7 A sectional perspective view of a guide shell structure according to an embodiment of the utility model;

[0020] Figure 8 A sectional perspective view of a shell body of a guide shell according to an embodiment of the utility model;

[0021] Fig. 9 A sectional perspective view of a deep well pump according to an embodiment of the utility model (only one impeller input unit is shown);

[0022] Fig.10This is an exploded view of the deep well pump according to an embodiment of the utility model after being cut along the axial direction. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0025] Figure 1-Figure 5 FIG. 2 shows a preferred embodiment of a mold for manufacturing a guide shell 20 for a deep well pump according to the utility model. Figure 6-Figure 10 As shown, the deep well pump includes a pump shaft (not shown) and a plurality of impeller water delivery units arranged in sequence along the axial direction. Each impeller water delivery unit includes an impeller 40, a guide vane 30 and a guide shell 20. The impeller 40 is arranged in the guide shell 20 and is driven to rotate by the pump shaft. The guide vane 30 is connected to the upper port 201 of the shell body 21. The guide vane 30 includes an annular wall 31, a connecting portion 32 located in the annular wall 31, and a plurality of blades 33 connected between the annular wall 31 and the connecting portion 32 and arranged in sequence along the circumferential direction. A guide flow channel 34 arranged in sequence along the circumferential direction is formed between the plurality of blades 33. The guide flow channel 34 is arranged in a spiral and is used to guide the water pumped out of the impeller 40 of the impeller water delivery unit to the next impeller water delivery unit. A first shaft hole 320 is opened in the middle of the connecting portion 32 of the guide vane 30, and a shaft sleeve 35 for the pump shaft to pass through is arranged in the first shaft hole 320. The lower end of the annular wall 31 of the guide vane 30 is connected to the upper port 201 of the shell body 21 of the impeller water delivery unit, and the upper end is connected to the guide shell 20 (specifically the cover plate 22) of the previous impeller water delivery unit.

[0026] The guide shell structure of this embodiment includes a guide shell 20 and a wear-resistant part 23 arranged on the inner wall of the guide shell 20. The guide shell 20 is a split structure, specifically including a shell body 21 and a cover plate 22. A second shaft hole 222 for the pump shaft to pass through is opened in the middle of the cover plate 22. A step can be set at the second shaft hole 222 to place a gasket 50 adapted to the impeller. The shell body 21 is annular as a whole, and has an upper port 201 and a lower port 202 opposite to each other. The cover plate 22 is detachably connected to the lower port 202 of the shell body 21. The wear-resistant part 23 is a rubber part, which is correspondingly arranged on the inner peripheral wall of the shell body 21, wherein the axial length of the rubber part is smaller than the axial length of the shell body 21. After the rubber part 23 is installed on the inner peripheral wall of the shell body 21, there is a distance between the lower end of the rubber part and the bottom wall of the lower port 202 of the shell body 21, and similarly, there is a distance between the upper end of the rubber part 23 and the top wall of the upper port 201 of the shell body 21. The above-mentioned rubber part 23 can not only reduce the impact wear of sand and gravel in the water flow on the guide shell 20, but also has a certain buffering and vibration reduction function, thereby improving the service life of the deep well pump.

[0027] The top of the cover plate 22 of this embodiment has a limit stop edge 221 extending upward near its outer peripheral edge, and the limit stop edge 221 is recessed inwardly relative to the outer peripheral wall of the cover plate 22 by a distance, thereby forming a third limit step 223. The peripheral edge of the lower port 202 of the shell body 21 is sleeved outside the limit stop edge 221 and abuts against the top of the outer peripheral edge of the cover plate 22, that is, the peripheral edge of the lower port 202 of the shell body 21 is limited on the third limit step 223 of the cover plate 22. The lower end of the rubber part abuts against the top of the limit stop edge, and the upper end is lower than the top surface of the upper port 201 of the shell body 21, so as to facilitate the connection between the upper port 201 of the shell body 21 and the annular wall 31 of the guide vane 30. Specifically, a fifth limiting step 311 is formed by a radial inward concave on the outer wall surface of the bottom port of the annular wall 31 of the guide vane 30, and the peripheral edge of the upper port 201 of the shell body 21 can just be arranged outside the fifth limiting step 311, and the upper end surface of the rubber part is against the bottom of the fifth limiting step 311 of the guide vane 30.

[0028] In order to ensure the secure assembly between the two adjacent impeller water delivery units, a sixth limiting step 312 that is concave radially outward is formed on the inner peripheral wall of the top port of the annular wall 31 of the guide vane 30, and correspondingly, a fourth limiting step 224 that is concave radially is formed at the bottom of the outer peripheral wall of the cover plate 22. The fourth limiting step 224 on the cover plate 22 of the upper impeller water delivery unit can be assembled with the sixth limiting step 312 on the guide vane 30 of the lower impeller water delivery unit, and the two form a limit in the radial direction, so that the two can avoid radial displacement due to force or vibration during operation, thereby ensuring the stability and reliability of the entire structure.

[0029] The rubber member 23 of the guide shell 20 can be attached to the inner wall of the shell body 21 by hot vulcanization in cooperation with a corresponding mold. Figure 1-Figure 5 The mold includes a lower mold body 11 and an upper mold body 12 that can move relative to each other in the up and down directions. Generally, the lower mold body 11 is fixed, and the upper mold body 12 is located above the lower mold body 11 and can move up and down relative to the lower mold body 11. Like conventional molds, the mold of this embodiment also has a heating and cooling system to ensure that the rubber is molded at a suitable temperature. The top of the lower mold body 11 has an extrusion chamber 110 that is open at the top, and multiple extrusion chambers 110 can be arranged in a horizontal and vertical manner. The shell body 21 of the guide shell 20 can be placed in the extrusion chamber 110. In order to accurately position the guide shell 20 in the extrusion chamber 110, the shape of the extrusion chamber 110 is adapted to the shape of the guide shell 20, and the outer peripheral wall of the shell body 21 in the extrusion chamber 110 that is in place is against the inner peripheral wall of the extrusion chamber 110. In addition, considering that in some cases the rubber member attached to the guide shell 20 needs to be arranged in the middle area away from the upper and lower ends of the guide shell 20, the bottom wall of the extrusion chamber 110 has a first slot 111 for inserting the lower end of the shell body 21. After the lower end of the shell body 21 is inserted into the first slot 111, the rubber will not be attached to the end position of the shell body 21 during the extrusion flow process.

[0030] The bottom of the upper mold body 12 has a downwardly extending punch 120, which is cylindrical and has a radial dimension slightly smaller than the inner diameter of the shell body 21. In this way, when the upper mold body 12 moves downward relative to the lower mold body 11, the punch 120 can be correspondingly extended into the inner cavity of the guide shell 20 placed in place in the extrusion chamber 110, and an annular gap 13 is provided between the outer peripheral wall of the punch 120 and the inner peripheral wall of the guide shell 20, and the annular gap 13 can be flowed into the rubber for hot extrusion and attached to the inner peripheral wall of the shell body 21. The thickness of the rubber piece attached to the inner wall of the shell body 21 can be achieved by controlling the size of the annular gap 13, such as selecting punches 120 with different outer diameters. When the shell body 21 is in place in the extrusion chamber 110, the upper end of the shell body 21 is higher than the top surface of the main body of the lower mold body 11. Correspondingly, the main body of the upper mold body 12 has a second slot 121 for inserting the upper end of the shell body 21 in the area corresponding to the periphery of the punch 120. The upper end of the shell body 21 is higher than the top surface of the main body of the lower mold body 11 to facilitate the removal of the guide shell 20 from the lower mold body 11. After the upper end of the shell body 21 is inserted into the second slot 121, the rubber will not be attached to the end position of the shell body 21 during the extrusion flow process, ensuring that after the rubber piece is attached to the inner wall of the shell body 21, a certain distance is reserved from the upper end of the shell body 21.

[0031] See also Figure 2The lower mold body 11 has a guide column 112 extending upward, and the upper mold body 12 has a guide sleeve 14 for the guide column 112 to slide through. Specifically, the lower mold body 11 and the upper mold body 12 are both in a cubic shape as a whole. There are multiple guide columns 112, which are respectively arranged at the four corners of the lower mold body 11, and there are also multiple guide sleeves 14, which are respectively arranged at the four corners of the upper mold body 12. The upper mold body 12 and the lower mold body 11 are guided and matched by multiple guide columns 112 and guide sleeves 14 to ensure the stability of the relative movement of the upper and lower mold bodies 11, and improve the processing quality of the rubber parts attached to the inner wall of the shell body 21.

[0032] The method of using the mold for manufacturing the guide shell 20 for the deep well pump is as follows:

[0033] The shell body 21 of the guide shell 20 is placed in the extrusion chamber 110 of the lower mold body 11, and its lower end is inserted into the first slot 111 at the bottom of the extrusion chamber 110, and then the raw material of the rubber part is quantitatively placed in the inner cavity of the shell body 21. Figure 5 As shown, the upper mold body 12 moves downward, so that the punch 120 at the bottom enters the inner cavity of the shell body 21, and squeezes the rubber raw material in the inner cavity of the shell body 21. After the upper mold body 12 moves down to the right position, the upper end of the shell body 21 of the guide shell 20 will also be correspondingly inserted into the second slot 121 of the upper mold body 12. The rubber after hot extrusion will flow into the annular gap 13 between the punch 120 and the shell body 21. After the temperature cools down, the rubber part will be attached to the inner circumferential wall of the shell body 21. Then, the upper mold body 12 moves upward, the punch 120 is separated from the lower mold body 11, and the shell body 21 with the rubber part attached can be removed from the extrusion chamber 110 of the lower mold body 11.

Claims

1. A mold for manufacturing a guide shell for a deep well pump, used to attach rubber to the inner wall of the guide shell (20) by hot vulcanization bonding, the guide shell (20) being annular as a whole, characterized in that: The mold comprises a lower mold body (11) and an upper mold body (12) which can move relative to each other in the up and down directions. The top of the lower mold body (11) has an extrusion chamber (110) which is open at the top and is used to place a guide shell (20). The bottom of the upper mold body (12) has a downwardly extending punch (120). The punch (120) can extend into the inner cavity of the guide shell (20) placed in place in the extrusion chamber (110). An annular gap (13) is provided between the outer peripheral wall of the punch (120) and the inner peripheral wall of the guide shell (20).

2. The mold for manufacturing a guide shell for a deep well pump according to claim 1, characterized in that: The shape of the extrusion chamber (110) is compatible with the shape of the guide shell (20), and the outer peripheral wall of the guide shell (20) in the extrusion chamber (110) that is in place abuts against the inner peripheral wall of the extrusion chamber (110).

3. The mold for manufacturing a guide shell for a deep well pump according to claim 2, characterized in that: The guide shell (20) has an upper port and a lower port which are opposite to each other, and the bottom wall of the extrusion chamber (110) has a first slot (111) for the lower end of the guide shell (20) to be inserted therein.

4. The mold for manufacturing a guide shell for a deep well pump according to claim 3, characterized in that: The upper end of the guide shell (20) placed in place in the extrusion chamber (110) is higher than the top surface of the main body of the lower mold body (11), and the main body of the upper mold body (12) has a second slot (121) for inserting the upper end of the guide shell (20) in an area corresponding to the periphery of the punch (120).

5. The mold for manufacturing a guide shell for a deep well pump according to claim 1, characterized in that: The lower mold body (11) is provided with a guide column (112) extending upward, and the upper mold body (12) is provided with a guide sleeve (14) for the guide column (112) to slide through.

6. The mold for manufacturing a guide shell for a deep well pump according to claim 5, characterized in that: The lower mold body (11) and the upper mold body (12) are generally in the shape of a cube. There are a plurality of guide pillars (112) which are respectively arranged at the four corners of the lower mold body (11). There are also a plurality of guide sleeves (14) which are respectively arranged at the four corners of the upper mold body (12).

7. The mold for manufacturing a guide shell for a deep well pump according to any one of claims 1 to 6, characterized in that: The top of the lower mold body (11) has at least two extrusion chambers (110), and correspondingly, the bottom of the upper mold body (12) has at least two convex molds (120).

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