Impeller pump head for deep-well pump

Abstract

The invention relates to the technical field of deep-well pumps, and particularly discloses an impeller pump head for a deep-well pump, the impeller pump head comprises a shell, a guide vane mechanism and an impeller mechanism, a cavity is formed in the shell, the guide vane mechanism and the impeller mechanism are both arranged in the cavity, and the guide vane mechanism is located at the top of the impeller mechanism; the guide vane mechanism and the impeller mechanism are both provided with shaft sleeves, the guide vane mechanism and the impeller mechanism are both arranged on a rotor bearing of the deep-well pump in a sleeving mode through the shaft sleeves, and the impeller mechanism is rotationally connected with the rotor bearing; the shell, the guide vane mechanism and the impeller mechanism are all made of plastic materials in an integrated injection molding mode. The impeller pump head is integrally formed by plastic materials in an injection molding mode, so that the impeller pump head is light and convenient to install, and the service life of the impeller pump head is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of deep well pumps, and in particular to an impeller pump head for a deep well pump. Background Art

[0002] The deep well pump is an important equipment for deep well water extraction. When in use, the whole unit works in the water, extracting groundwater to the surface, which is mainly an important water intake and drainage tool for farmland irrigation. The impeller pump head is the main part of the deep well pump. At present, iron impeller pump heads are used. However, after half a year of non-working period, the entire impeller pump head is very easy to rust. In addition, the iron impeller pump head is heavy, not conducive to installation, and has a short service life. Summary of the invention

[0003] The purpose of the present invention is to provide an impeller pump head for a deep well pump, which solves the problems that the impeller pump head is heavy, easy to rust, inconvenient to install and has a short service life.

[0004] In order to solve the above-mentioned technical problems, the present invention provides an impeller pump head for a deep well pump, comprising a shell, a guide vane mechanism and an impeller mechanism, wherein a cavity is opened in the shell, the guide vane mechanism and the impeller mechanism are both arranged in the cavity, and the guide vane mechanism is located at the top of the impeller mechanism; the guide vane mechanism and the impeller mechanism are both provided with shaft sleeves, the guide vane mechanism and the impeller mechanism are both arranged on the rotor bearing of the deep well pump through the shaft sleeve, and the impeller mechanism is rotatably connected to the rotor bearing; the shell, the guide vane mechanism and the impeller mechanism are all formed by integrally molding and injection molding using plastic material.

[0005] A further technical solution is that the shell, the guide vane mechanism and the impeller mechanism are all made of plastic mixed with 70% PPO material + 30% glass fiber material.

[0006] A further technical solution is that the guide vane mechanism comprises a guide portion, an outer wall of the guide portion is evenly provided with guide vanes, and two adjacent guide vanes form a guide channel on the outer wall of the guide portion.

[0007] A further technical solution is that the impeller mechanism includes an upper cover plate, blades and a lower cover plate, the blades are evenly distributed between the upper cover plate and the lower cover plate, and the blades are fixedly connected to the upper cover plate and the lower cover plate respectively, two adjacent blades and the upper cover plate and the lower cover plate are enclosed to form a flow channel, wherein the number of the guide vanes is greater than the number of the blades.

[0008] A further technical solution is that the guide vanes are all curved.

[0009] A further technical solution is that threaded holes are opened on the guide channel, the number of the threaded holes is greater than 2, mounting holes are opened on the inner wall of the shell corresponding to the threaded holes one by one, and the guide vane mechanism is fixedly connected to the shell by bolts passing through the threaded holes and the mounting holes.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The shell, guide vane mechanism and impeller mechanism of the impeller pump head are all made of plastic materials, and are all molded into the guide vane mechanism and impeller mechanism using an integrated injection molding process. The impeller pump head manufactured in this way abandons iron and chooses plastic in terms of material, making the entire impeller pump head lighter, and the guide vane mechanism and impeller mechanism are all integrally molded and injection molded, and there is no need to use welding technology to weld the guide vane mechanism and impeller mechanism. Such guide vane mechanism and impeller mechanism are stronger and have a longer service life. The impeller pump head will not be damaged after long-term use, and the impeller pump head is more convenient to install when used for deep well pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of an impeller pump head provided in an embodiment of the present invention; Figure 2 A schematic structural diagram of a guide vane mechanism and an impeller mechanism in an impeller pump head provided in an embodiment of the present invention.

[0012] Icon: 1-housing, 2-guide vane mechanism, 21-guide part, 22-guide vane, 23-threaded hole, 3-impeller mechanism, 31-upper cover plate, 32-lower cover plate, 33-blade. DETAILED DESCRIPTION

[0013] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Example 1 An embodiment of the present invention provides an impeller pump head for a deep well pump, comprising a shell 1, a guide vane mechanism 2 and an impeller mechanism 3, wherein a cavity is opened in the shell 1, the guide vane mechanism 2 and the impeller mechanism 3 are both arranged in the cavity, and the guide vane mechanism 2 is located at the top of the impeller mechanism 3, the guide vane mechanism 2 and the impeller mechanism 3 are both provided with shaft sleeves, the guide vane mechanism 2 and the impeller mechanism 3 are both arranged on the rotor bearing of the deep well pump through the shaft sleeve, and the impeller mechanism 3 is rotatably connected to the rotor bearing; the shell 1, the guide vane mechanism 2 and the impeller mechanism 3 are all made of plastic material by integral injection molding.

[0015] In the embodiment of the present invention, Figure 1-2 As shown, the impeller pump head for a deep well pump comprises a housing 1, a guide vane mechanism 2 and an impeller mechanism 3. The housing 1 is in the shape of a column with upper and lower openings, and a cavity is provided in the housing 1. The guide vane mechanism 2 and the impeller mechanism 3 are both arranged in the cavity, and the guide vane mechanism 2 and the impeller mechanism 3 are spaced from the inner wall of the housing 1; wherein the guide vane mechanism 2 and the impeller mechanism 3 are arranged in an upper and lower position in the housing 1, that is, the guide vane mechanism 2 is arranged on the top of the impeller mechanism 3, and the central axis positions of the guide vane mechanism 2 and the impeller mechanism 3 are penetrated with sleeve holes, and the sleeve holes are used to install shaft sleeves, and the guide vane mechanism 2 and the impeller mechanism 3 are both sleeved on the deep well pump through the shaft sleeves. The impeller mechanism 3 is rotatably connected to the rotor bearing, that is, the impeller mechanism 3 can rotate on the rotor bearing of the deep well pump; the housing 1, the guide vane mechanism 2 and the impeller mechanism 3 are all made of plastic material by integral injection molding. In order to realize that the guide vane mechanism 2 and the impeller mechanism 3 can be integrally formed by injection molding, during injection molding, in order to inject the flow channels of the guide vane mechanism 2 and the impeller mechanism 3, the insert for plugging in the flow channel is divided into an upper and lower part, which is convenient for removing the insert when the guide vane mechanism 2 and the impeller mechanism 3 are injected, so as to realize integral injection molding; after the injection molding, the guide vane mechanism, the impeller mechanism and the housing are assembled into a complete impeller pump head.

[0016] The impeller pump head provided by this embodiment, when used in a deep well pump, has a shell, a guide vane mechanism and an impeller mechanism of the impeller pump head that are all made of plastic material, and are all injection molded into the guide vane mechanism and the impeller mechanism using an integrated injection molding process. The impeller pump head manufactured in this way abandons iron and chooses plastic in terms of material, so that the entire impeller pump head is lighter in weight, and the guide vane mechanism and the impeller mechanism are both integrally formed by injection molding, and there is no need to use a welding process to weld the guide vane mechanism and the impeller mechanism. Such a guide vane mechanism and impeller mechanism are stronger and have a longer service life, the impeller pump head will not be damaged after long-term use, and the impeller pump head is more convenient to install when used in a deep well pump.

[0017] In one embodiment, since the guide vane mechanism and the impeller mechanism are both made of plastic, the wear resistance and hardness of the material need to be considered when selecting the material. The shell, guide vane mechanism and impeller mechanism provided in this embodiment are all made of plastic mixed with 70% PPO material + 30% glass fiber material. The shell, guide vane mechanism and impeller mechanism made of the mixed plastic material have the strength required for the use of the impeller pump head, and are also light, wear-resistant and high-temperature resistant, which makes the impeller pump head more durable in use and increases the service life of the impeller pump head.

[0018] In one embodiment, Figure 2As shown, the guide vane mechanism 2 in the impeller pump head includes a guide portion 21 and guide blades 22. In this embodiment, the number of guide blades 22 is 7. The guide portion 21 is a column with a trapezoidal cross section. Seven guide blades 22 are evenly fixedly installed in a circular array on the outer wall of the guide portion 21, and two adjacent guide blades 22 form a guide channel on the outer wall of the guide portion 21, that is, when there are 7 guide blades 22, 7 guide channels are formed on the outer wall of the guide portion 21. The guide vane mechanism 2 is made of a plastic material mixed with 70% PPO material + 30% glass fiber material by integral injection molding. The liquid passing through the guide vane mechanism 2 flows from the guide channel. A mounting sleeve is passed through the central axis of the guide portion 21, and the guide portion 21 is sleeved on the rotor bearing of the deep well pump through the sleeve. In order to realize the integral injection molding of the guide vane mechanism 2, a guide vane mold for the integral injection molding guide vane mechanism is made according to the shape and structure of the guide vane mechanism during injection molding. , because the guide vane mechanism includes 7 guide vanes, and adjacent guide vanes form guide channels on the guide part, the guide vane mechanism has a total of 7 guide channels, so the guide vane mold includes 7 guide vane molds for injection molding guide vanes, and gaps consistent with the shape of the guide channels are provided between adjacent guide vane molds, with a total of 7 gaps, which are all used for injection molding into guide channels, so plugs will be inserted in the gaps to successfully injection mold the guide channels, and each plug is split into upper and lower parts during injection molding, that is, 14 plugs will be used to be inserted in the 7 gaps during injection molding, and when the injection molding is completed and demolded, the plugs can be directly removed manually, and the removal is very convenient, the guide vane mechanism injection molded in this way is integrally formed, and there is no need to separately injection mold the guide part and the guide vane as in the prior art, and then weld the guide vane and the guide part by welding, the guide vane mechanism provided by this embodiment is lighter and stronger when used, and has a longer service life.

[0019] In one embodiment, Figure 2As shown, the impeller mechanism 3 includes an upper cover plate 31, blades 33 and a lower cover plate 32, wherein the number of guide blades 22 is greater than the number of blades 33. In this embodiment, the number of blades 33 of the impeller mechanism 3 is 6, and the 6 blades 33 are evenly distributed in an annular array between the upper cover plate 31 and the lower cover plate 32, and the blades 33 are respectively fixedly connected to the upper cover plate 31 and the lower cover plate 32, and two adjacent blades 33 are enclosed together with the upper cover plate 31 and the lower cover plate 32 to form a flow channel. When the number of blades 33 is 6, there are 6 flow channels on the impeller mechanism 3. The impeller mechanism 3 is also made of a plastic material mixed with 70% PPO material + 30% glass fiber material by integral injection molding. During injection molding, an impeller mold for integral injection molding of the impeller mechanism is made according to the shape and structure of the impeller mechanism. Because the impeller mechanism includes 6 blades, and the adjacent blades are enclosed together with the upper cover plate and the lower cover plate The impeller mechanism has 6 flow channels in total, so the impeller mold includes a cover plate mold for injection molding an upper cover plate and a lower cover plate, and a blade mold for injection molding a blade. The adjacent blade molds and the cover plate mold are enclosed together to form a gap consistent with the shape of the flow channel. There are 6 gaps in total, and these gaps are all used to injection mold flow channels, so plug-ins are also plugged into the gaps to successfully injection mold the flow channels. During injection molding, each plug-in is also split into two parts, that is, 12 plug-ins are used to be plugged into 6 gaps during injection molding. When the injection molding is completed and the mold is demolded, the plug-in can also be directly removed manually, and it is very convenient to remove. The impeller mechanism injection molded in this way is integrally formed, and there is no need to separate the injection molded cover plate and the blades as in the prior art, and then assemble them into an impeller mechanism by welding. The impeller mechanism provided by this embodiment is lighter and more secure when used, and has a longer service life.

[0020] Furthermore, the liquid through the impeller mechanism 3 flows through the flow channel, and a shaft sleeve is installed through the center position of the upper cover plate 31 and the lower cover plate 32. The impeller mechanism 3 is sleeved on the rotor bearing of the deep well pump through the shaft sleeve and is rotatably connected to the rotor bearing; the number of blades 33 of the impeller mechanism 3 is less than the number of guide blades 22 of the guide vane mechanism 2, so that the flow resistance of the fluid in the impeller mechanism 3 is smaller, and it can better adapt to large flow conditions. At the same time, the number of guide blades is slightly more than the number of impeller blades, which can better rectify and convert energy in the guide vane mechanism 2, thereby improving the head and efficiency of the pump. This matching of the number of blades 33 can reduce the impact and eddy loss of the fluid between the impeller mechanism 3 and the guide vane mechanism 2, thereby improving the overall efficiency of the pump. When the number of guide blades 22 is slightly more than the number of impeller blades 33, it can better guide the fluid flow and further reduce the risk of cavitation.

[0021] In one embodiment, Figure 2As shown, the guide vanes 22 in the guide vane mechanism 2 are all curved, so that the guide vane mechanism 2 can better guide the fluid flow, make the transition of the fluid between the impeller and the guide vane smoother, reduce the impact and eddy loss of the fluid, and more effectively convert the kinetic energy of the fluid into pressure energy, thereby improving the hydraulic efficiency of the pump. The curved shape of the guide vane 22 can better match the impeller, thereby improving the performance and efficiency of the entire pump system.

[0022] In one embodiment, a threaded hole 23 is provided on the guide channel in the guide vane mechanism 2, and the number of the threaded holes 23 is a number greater than 2. For example, threaded holes 23 are distributed on the four guide channels, and then mounting holes are provided on the inner wall of the shell 1 corresponding to the positions of the threaded holes 23, the mounting holes match the threaded holes 23, and the shell 1 and the guide vane mechanism 2 are fixedly connected by screws passing through the mounting holes and the threaded holes 23; this structure in which the guide vane mechanism 2 is fixed to the inner wall of the shell 1 by screws is convenient for disassembly and maintenance, that is, when the guide vane mechanism 2 needs to be replaced or repaired, it can be easily operated by simply unscrewing the screws, without disassembling the entire impeller or shell 1, thereby reducing maintenance costs and time, and the screw fixing method can ensure the stability of the guide vane mechanism 2 in the shell 1, avoid loosening or displacement of the guide vane mechanism 2 due to vibration or impact, thereby ensuring the operating performance of the pump, and the impeller mechanism 3 is not fixed to the shell 1, which can maintain the flexibility and freedom of the impeller mechanism 3, reduce the stress concentration problem that may be caused by the fixed connection, and also help reduce the risk of damage to the impeller mechanism 3 due to friction or thermal expansion during operation.

[0023] With the impeller pump head for a deep well pump provided by the present invention, the number of guide vanes 22 is greater than the number of blades 33, which effectively optimizes the flow path of the fluid, reduces energy loss, and improves the efficiency of the pump. The curved guide vanes 22 can better guide the fluid, reduce eddy currents and impacts, and thus reduce hydraulic losses. The guide vane mechanism 2 is fixed to the inner wall of the pump head housing 1 by screws, and this fixing method is convenient for installation and disassembly, thereby reducing maintenance costs. The guide vane mechanism, the impeller mechanism, and the housing are formed by one-piece injection molding of a plastic mixture of 70% PPO material + 30% glass fiber material, and the guide vane mechanism, the impeller mechanism, and the housing are assembled into a complete impeller pump head. Such an impeller pump head is lighter in weight and more convenient to install, and the materials used are wear-resistant and high-temperature resistant, and the guide vane mechanism and the impeller mechanism do not need to be assembled by welding, so that the impeller pump head is more solid, which greatly increases the service life of the impeller pump head.

[0024] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the drawings and claims disclosed herein, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. An impeller pump head for a deep well pump, characterized in that: Comprising a shell (1), a guide vane mechanism (2) and an impeller mechanism (3), wherein a cavity is provided in the shell (1), the guide vane mechanism (2) and the impeller mechanism (3) are both arranged in the cavity, and the guide vane mechanism (2) is located at the top of the impeller mechanism (3); The guide vane mechanism (2) and the impeller mechanism (3) are both provided with shaft sleeves, the guide vane mechanism (2) and the impeller mechanism (3) are both sleeved on the rotor bearing of the deep well pump through the shaft sleeves, and the impeller mechanism (3) is rotatably connected to the rotor bearing; The housing (1), the guide vane mechanism (2) and the impeller mechanism (3) are all made of plastic material by integral injection molding.

2. The impeller pump head for a deep well pump according to claim 1, characterized in that: The housing (1), the guide vane mechanism (2) and the impeller mechanism (3) are all made of plastic formed by a mixture of 70% PPO material and 30% glass fiber material.

3. The impeller pump head for a deep well pump according to claim 1, characterized in that: The guide vane mechanism (2) comprises a guide portion (21), the outer wall of the guide portion (21) being evenly provided with guide vanes (22), and two adjacent guide vanes (22) forming a guide channel on the outer wall of the guide portion (21).

4. The impeller pump head for a deep well pump according to claim 3, characterized in that: The impeller mechanism (3) comprises an upper cover plate (31), blades (33) and a lower cover plate (32); the blades (33) are evenly distributed between the upper cover plate (31) and the lower cover plate (32); the blades (33) are respectively fixedly connected to the upper cover plate (31) and the lower cover plate (32); two adjacent blades (33) are enclosed with the upper cover plate (31) and the lower cover plate (32) to form a flow channel; The number of the guide vanes (22) is greater than the number of the blades (33).

5. The impeller pump head for a deep well pump according to claim 3, characterized in that: The guide vanes (22) are all in a curved shape.

6. The impeller pump head for a deep well pump according to claim 3, characterized in that: Threaded holes (23) are provided on the guide channel, the number of the threaded holes (23) is greater than 2, mounting holes are provided on the inner wall of the shell (1) in one-to-one correspondence with the threaded holes (23), and the guide vane mechanism (2) is fixedly connected to the shell (1) by bolts penetrating the threaded holes (23) and the mounting holes.

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