Submersible corrosion resistant rotor pump

Abstract

The submersible corrosion-resistant rotor pump of the present invention comprises: a feed pipe, a support shaft, a transmission shaft, a coupling, a motor, an upper cover, an outer tube, a single-machine flange, a discharge tray, a lower cover and a rotor pump. The upper cover and the lower cover are fixed at the upper end and the lower end of the outer tube, the single-machine flange is fixed in the outer tube near the upper cover, the motor is mounted on the single-machine flange, the motor shaft passes through the single-machine flange and is connected with the transmission shaft, the discharge tray is fixed on the single-machine flange through the support shaft, the transmission shaft passes through the discharge tray and is connected with the rotor pump. The rotor pump comprises: an upper shell, an outer rotor, an inner rotor, an outer shell and a lower shell. The lower shell and the upper shell are mounted on the upper end and the lower end of the outer shell, the outer rotor and the inner rotor are mounted in the space surrounded by the lower shell, the upper shell and the outer shell, the transmission shaft is connected with the inner rotor, a feed cavity is opened on the lower shell, a discharge cavity is opened on the upper shell, one end of the feed pipe is connected with the discharge cavity, and the other end is connected with the discharge tray, a discharge port communicating with the discharge tray is opened on the outer tube, and a feed hole is opened on the lower cover.

Description

Technical Field

[0001] The invention relates to a pump, in particular to a submersible corrosion-resistant rotor pump. Background Art

[0002] In the field of industrial washing (which can be extended to the fields of chemical, petroleum, pharmaceutical, etc.), it is often necessary to transport various corrosive or non-corrosive liquids. When facing these corrosive media, traditional pumps are prone to problems such as low transmission efficiency, inability to work for a long time, pump body corrosion, seal failure, unstable operation, and even personal safety, resulting in a shortened pump life, unstable operation, increased maintenance costs, and easy to cause harm to the staff, thus affecting the overall work efficiency.

[0003] The rotor pump is used for liquid transportation, and its input end is inserted into the liquid through the input pipe, but there is no search for the use of the rotor pump in a submersible pump. The embedded pump is to put the pump body and the motor into the liquid, and the motor must be sealed in the liquid. However, for highly corrosive liquids, the sealing requirements of the pump are extremely high. Even if the sealing is excellent, its life is extremely short. It is urgent to invent a submersible corrosion-resistant rotor pump with long life, simple structure and corrosion resistance. Summary of the invention

[0004] The invention purpose of the present application is to overcome the defects of the existing submersible pumps, combine the rotor pump with the embedded pump, and provide a submersible corrosion-resistant rotor pump through ingenious structural design, which greatly improves the life and corrosion resistance of the pump.

[0005] In order to achieve the invention purpose of this application, this application adopts the following technical solutions:

[0006] The present invention discloses a submersible corrosion-resistant rotor pump, which comprises: a feed pipe, a support shaft, a transmission shaft, a coupling, a motor, an upper cover, an outer tube, a single-machine flange, a discharge tray, a lower cover and a rotor pump, wherein the upper cover and the lower cover are respectively fixed at the upper end and the lower end of the outer tube, wherein: the single-machine flange is fixed in the outer tube close to the upper cover, the motor is installed in the cavity between the single-machine flange and the upper cover, the shaft of the motor passes through the single-machine flange and is connected to the transmission shaft through the coupling, the discharge tray is fixed to the single-machine flange through at least two support shafts, the transmission shaft passes through the discharge tray and is connected to the rotor pump close to the lower cover, and the rotor pump comprises: a lower shell, an outer rotor, an inner rotor, an outer shell and an upper shell, wherein the lower shell and the upper shell are respectively installed at the upper end and the lower end of the outer shell, An outer rotor and an inner rotor are installed in the space surrounded by the lower shell, the upper shell and the outer shell. The transmission shaft is connected to the inner rotor, which drives the inner rotor to rotate. The outer rotor is on the outer ring of the inner rotor and meshes with the inner rotor. A feed cavity is opened on the lower shell, and a discharge cavity is opened on the upper shell. One end of the feed pipe is connected to the discharge cavity, and the other end is connected to the discharge channel on the discharge tray. A discharge port is opened on the outer tube, and the discharge port is connected to the discharge channel. A number of feed holes are opened on the lower cover, and the submerged corrosion-resistant rotor pump is placed in the liquid feed. The motor rotates to drive the inner rotor and the outer rotor to rotate. The inner rotor and the outer rotor press the feed pressure of the feed cavity into the feed pipe of the discharge cavity, and the liquid feed is sent out from the discharge port through the feed pipe and the discharge channel.

[0007] The submersible corrosion-resistant rotor pump of the present invention, wherein: the submersible corrosion-resistant rotor pump also includes: a liquid level switch, and the liquid level switch is installed at the lower end of the lower shell.

[0008] The submersible corrosion-resistant rotor pump of the present invention, wherein: the discharge cavity and the feed cavity are respectively opened at symmetrical positions of the upper shell and the lower shell which are symmetrical with the transmission axis.

[0009] The submersible corrosion-resistant rotor pump of the present invention, wherein: the discharge cavity and the feed cavity are arc-shaped.

[0010] The submersible corrosion-resistant rotor pump of the present invention comprises three support shafts which are evenly fixed on the circumference between the single machine flange and the discharge tray.

[0011] The submersible corrosion-resistant rotor pump of the present invention, wherein: the material of the lower shell, outer rotor, inner rotor, outer shell, feed pipe, upper shell, transmission shaft, outer tube, discharge tray and lower cover is 904 stainless steel, PEEK or UPVC.

[0012] The submersible corrosion-resistant rotor pump of the present invention, wherein: the cross-sections of the feed cavity and the discharge cavity are both crescent-shaped.

[0013] Compared with conventional pumps, the submersible corrosion-resistant rotor pump of the present invention has the following advantages:

[0014] 1. Long life

[0015] The structure of the traditional pump body is that the motor directly drives the pump body to move. Due to the characteristics of the motor itself, it cannot be completely sealed and therefore cannot be submerged in the liquid as a whole. The submersible rotor pump of the present invention effectively raises the motor, which protects the motor while not affecting the overall movement effect of the pump body. The submersible corrosion-resistant rotor pump of the present invention is a submersible corrosion-resistant rotor pump with a long service life, simple structure and corrosion resistance.

[0016] 2. Corrosion resistance

[0017] The pump body has excellent corrosion resistance and can operate stably for a long time in liquids such as strong acid, strong alkali, and strong chlorine; the submersible corrosion-resistant rotor pump body of the present invention is made of special stainless steel, chemical-resistant PEEK, and UPVC materials. The molecules remain relatively stable in high or low temperature environments, and can adapt to various extreme environments to maintain stable operation of the system;

[0018] 3. Effective motor protection

[0019] Under the condition of ensuring the normal transmission efficiency of the motor, a special transmission shaft can be customized and installed to submerge the pump body to the bottom of the liquid, so as to better protect the motor;

[0020] 4. High efficiency, energy saving and accurate measurement

[0021] The submersible rotor pump of the present invention adopts advanced 4-tooth gear hydraulic design and optimized motor matching (after continuous improvement through formula calculation and clinical trials, our 4-tooth gear has absolute advantages over 3-tooth gear in terms of transmission pressure, flow, metering accuracy and overall efficiency), which can achieve higher transmission efficiency and reduce energy consumption. The unique gear arc design reduces internal flow loss, thereby improving the overall efficiency of the pump;

[0022] 5. More convenient installation

[0023] No need for complex infrastructure and installation platform, saving installation time and space. Reduced demand for pipeline connections and support structures, effectively reducing costs;

[0024] 6. Stable operation, better adaptability to various harsh working environments

[0025] The pump body can be immersed in the medium being transported, and the external interference received during operation is small, and it can maintain a stable working state. Less vibration and noise improve the working environment and reduce the impact on peripheral equipment; the pump body is made of special corrosion-resistant materials, such as special stainless steel, PEEK or UPVC, and undergoes special surface treatment and processing technology, such as stainless steel demagnetization treatment, which greatly enhances its corrosion resistance and wear resistance, thereby improving the overall stability and service life of the equipment; it can adapt to different media and industrial and mining conditions, such as complex media with high viscosity, containing solid particles, and highly corrosive media, and has good tolerance to various harsh environments.

[0026] 7. Maintenance is simple

[0027] The structure is simple, the cost is low, and the replacement and maintenance are very convenient.

[0028] 8. Effectively protect staff

[0029] It uses 24V direct current and the pump is lightweight, so it can be carried by one person and put into highly corrosion-resistant working environments such as strong acids, alkalis, and chlorine, effectively protecting the staff.

[0030] 9. The pump has more advantages

[0031] The submersible rotor pump of the present invention has accurate and stable transmission, ensures a strict transmission ratio, and the speed and torque of the output shaft are precisely controllable; it can achieve higher energy transfer efficiency, less energy consumption, and higher transmission rate; it can bear larger loads and use transmission requirements of various powers; it has a compact structure and a long service life, and can maintain stable operation in various harsh environments; after a long period of work, it can be installed and used again with only slight polishing, which greatly saves the use cost; the pressure of the conveying medium can be adjusted, and it has good tolerance for high pressure or ultra-high pressure. Even if the pressure is blocked, the pressure will be transmitted back to the pump body, and the pump body gear will actively reduce the speed, and the pipe burst phenomenon will not occur, effectively protecting the safety of workers; at the same time, the pump body adopts a 24V DC motor, and the pump body is light in weight, so it can be directly carried by one person, and the pump body can be put into a strong corrosion-resistant working environment such as strong acid, alkali, and chlorine to work, and it is very simple to disassemble, repair, and replace, and it can effectively protect the staff. Under the condition of ensuring the normal transmission efficiency of the motor, the length of the transmission shaft can be customized one-to-one to adapt to the medium liquid level at different depths, and the pump body can be submerged to the bottom of the transmission medium, so as to better protect the motor and will not be easily damaged;

[0032] The submersible corrosion-resistant rotor pump body of the present invention perfectly avoids the disadvantage of high noise of gear transmission, and has extremely low noise. The pump body can be immersed in the medium being transported, and the external interference received during operation is small, and it can maintain a stable working state. Less vibration and noise improve the working environment, reduce the impact on surrounding equipment, and is more environmentally friendly;

[0033] 10. The pump has a wide range of applications

[0034] The submersible corrosion-resistant rotor pump of the present invention can transport various viscous media, including ultra-viscous media with very low fluidity, and can adapt to different media and industrial and mining conditions, such as complex media such as high viscosity and highly corrosive media, and has good tolerance to various harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a forward cross section of the submersible corrosion-resistant rotor pump of the present invention;

[0036] Figure 2 is a bottom view of the upper shell;

[0037] Figure 3 is a top view schematic diagram of the lower shell;

[0038] Figure 4 This is a schematic cross-sectional view of the rotor pump cross section.

[0039] exist Figures 1 to 4 Among them, label 1 is a liquid level switch; label 2 is a lower shell; label 3 is an outer rotor; label 4 is an inner rotor; label 5 is an outer shell; label 6 is a feed pipe; label 7 is a support shaft; label 8 is a transmission shaft; label 9 is a coupling; label 10 is a motor; label 11 is an upper cover; label 12 is an outer tube; label 13 is a single machine flange; label 14 is a discharge tray; label 15 is an upper shell; label 16 is a lower cover; label 17 is a feed chamber; label 18 is a feed hole; label 19 is a discharge port; label 20 is a discharge channel; label 21 is a discharge chamber. DETAILED DESCRIPTION

[0040] like Figures 1 to 4As shown, the submersible corrosion-resistant rotor pump of the present invention comprises: a feed pipe 6, a support shaft 7, a transmission shaft 8, a coupling 9, a motor 10, an upper cover 11, an outer tube 12, a single-machine flange 13, a discharge tray 14, a lower cover 16 and a rotor pump, wherein the upper cover 11 and the lower cover 16 are respectively fixed at the upper end and the lower end of the outer tube 12. The single-machine flange 13 is fixed in the outer tube 12 close to the upper cover 11, the motor 10 is installed in the cavity between the single-machine flange 13 and the upper cover 11, the shaft of the motor 10 passes through the single-machine flange 13, and is connected to the transmission shaft 8 through the coupling 9, and the discharge tray 14 is fixed on the single-machine flange 13 through three support shafts 7, which are evenly fixed on the circumference between the single-machine flange 13 and the discharge tray 14. The transmission shaft 8 passes through the discharge tray 14 and is connected to the rotor pump near the lower cover 16. The rotor pump includes: an upper shell 2, an outer rotor 3, an inner rotor 4, an outer shell 5 and an upper shell 15. The lower shell 2 and the upper shell 15 are respectively mounted on the upper end and the lower end of the outer shell 5. The outer rotor 3 and the inner rotor 4 are mounted in the space surrounded by the lower shell 2, the upper shell 15 and the outer shell 5. The transmission shaft 8 is connected to the inner rotor 4, and the transmission shaft 8 drives the inner rotor 4 to rotate. The outer rotor 3 is on the outer ring of the inner rotor 4 and meshes with the inner rotor 4. The number of teeth of the inner rotor 4 is 4, and the number of teeth of the outer rotor 3 is 5. A feed cavity 17 is provided on the lower shell 2, and a discharge cavity 21 is provided on the upper shell 15. One end of the feed pipe 6 is connected to the discharge cavity 21, and the other end is connected to the discharge channel 20 on the discharge plate 14. The discharge cavity 21 and the feed cavity 17 are respectively provided at symmetrical positions of the upper shell 15 and the lower shell 2 symmetrical to the transmission shaft 8, and the discharge cavity 21 and the feed cavity 17 are arc-shaped. A discharge port 19 is provided on the outer tube 12, and the discharge port 19 is connected to the discharge channel 20. A plurality of feed holes 18 are provided on the lower cover 16. The submerged corrosion-resistant rotor pump is placed in the liquid feed, and the motor 10 rotates, driving the inner rotor 4 and the outer rotor 3 to rotate. When the inner rotor 4 rotates into the teeth of the outer rotor 3, the liquid feed is pressed into the feed pipe 6 of the discharge cavity 21, and the liquid feed is sent out from the discharge port 19 through the feed pipe 6 and the discharge channel 20.

[0041] The submersible corrosion-resistant rotor pump further comprises: a liquid level switch 1 , which is mounted at the lower end of the lower housing 2 .

[0042] The structures and shapes of the inner rotor 4 and the outer rotor 3 can refer to the inner rotor and the outer rotor of a conventional rotor pump.

[0043] The liquid feed enters the cavity surrounded by the lower cover 16, the outer tube 12 and the lower shell 2 through the feed hole 18, and is poured into the rotor pump from the feed cavity 17 of the lower shell 2. Driven by the motor 10, the inner rotor 4 rotates, and the outer rotor 3 engages with the inner rotor 4. With the relative movement of the inner rotor 4 and the outer rotor 3, the liquid feed of the rotor pump is pressed into the feed pipe 6 of the discharge cavity 21, and the liquid feed is delivered from the discharge port 19 through the feed pipe 6 and the discharge channel 20.

[0044] The materials of the lower housing 2, the outer rotor 3, the inner rotor 4, the outer housing 5, the feed pipe 6, the upper housing 15, the transmission shaft 8, the outer tube 12, the discharge tray 14 and the lower cover 16 are 904 stainless steel, PEEK or UPVC.

[0045] In the inner rotor 4 and the outer rotor 3, the sealed volume formed by the tooth top of the inner rotor 4 and the tooth valley of the outer rotor 3 gradually expands to form a local vacuum, so that the liquid is sucked into the sealed cavity from the oil suction window to achieve the liquid suction effect. As the rotor continues to rotate, the sealed volume filled with oil gradually decreases, the liquid is squeezed, and then discharged from the pump body through the oil discharge window to achieve the liquid discharge effect. Continuous working cycle, the continuous rotation of the inner and outer rotors causes the liquid to be continuously sucked in and discharged, thereby completing the pump's liquid suction and discharge function. The inner rotor and the outer rotor produce a meshing process, and the cavity volume formed by the two is the volume of the pump liquid, thereby achieving accurate measurement of the pump liquid. The pump displacement formula is: Q1 = n * V1, where Q1 is the theoretical displacement of the pump, in ml / r; n is the speed of the pump, in r / min; V1 is the basic volume of each tooth type of the pump, in mL.

[0046] The inner rotor 4 and the outer rotor 3 are designed and processed with high precision. Only a gap of 0.01 mm is formed between the two during the meshing process, and there is no internal leakage, thus achieving the effect of high pressure and high lift.

[0047] The cross-sections of the feed cavity 17 and the discharge cavity 21 are both crescent-shaped structures; the arc where the cross-section of the crescent-shaped structure is located is a circular arc, the radius of the circular arc is an inner arc R12 mm, the outer arc R19 mm, and the depth of the circular arc groove is 8 mm. The liquid can be sucked into the pump body through the suction hole 18 at the bottom of the pump body. The internal structure of the pump body operates to control the amount and flow rate of the liquid, and pumps the liquid into the solenoid valve body. The solenoid valve controls the liquid through the internal pipeline to the required equipment by opening and closing.

[0048] The unique shape design of the feed cavity 17 and the discharge cavity 21 can increase the liquid contact area, thereby improving the washing efficiency. Compared with the traditional regular shape window, the crescent-shaped curved edge can better adapt to the characteristics of liquid flow, reduce the resistance of liquid flow, and make the liquid be sucked in or discharged more smoothly; this structure can provide a more effective liquid suction (discharge) area in a limited space. Under the condition of the same size, more liquid can be absorbed or the same amount of liquid can be absorbed (discharged) in a smaller space; it helps to reduce the residual medium. Due to the unique size of the crescent-shaped curve, the medium is less likely to gather and remain on the edge of the window after being absorbed, thereby providing precision and accuracy of the washing liquid; from a mechanical point of view, this unique structure (the radius of the arc is R12 mm for the inner arc, R19 mm for the outer arc, and the depth of the arc groove is 8 mm) has good stability and pressure resistance, and can withstand a certain pressure during work without being easily deformed or damaged; and when combined with the material of the pump, it will produce unexpected technical effects, effectively increasing the transmission pressure, the flow rate of the transmission medium, and the flow accuracy of the transmission medium, while effectively preventing the corrosion of strong acid and strong alkali transmission media.

[0049] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A submersible corrosion-resistant rotor pump, comprising: A conveying pipe (6), a supporting shaft (7), a transmission shaft (8), a coupling (9), a motor (10), an upper cover (11), an outer tube (12), a single-machine flange (13), a discharge tray (14), a lower cover (16) and a rotor pump, wherein the upper cover (11) and the lower cover (16) are respectively fixed to the upper end and the lower end of the outer tube (12), and the single-machine flange (13) is fixed in the outer tube (12) close to the upper cover (11), and the motor (10) is installed in the single-machine flange (13) in the cavity between the single-machine flange (13) and the upper cover (11). ), the shaft of the motor (10) passes through the single machine flange (13) and is connected to the transmission shaft (8) through a coupling (9); the discharge tray (14) is fixed to the single machine flange (13) through at least two supporting shafts (7); the transmission shaft (8) passes through the discharge tray (14) and is connected to a rotor pump fixed near the lower cover (16); the rotor pump comprises: a lower shell (2), an outer rotor (3), an inner rotor (4), an outer shell (5) and an upper shell (15); the lower shell (2) and the upper shell (15) are respectively mounted on the upper end and the lower end of the outer shell (5); An outer rotor (3) and an inner rotor (4) are installed in a space enclosed by a lower shell (2), an upper shell (15) and an outer shell (5); a transmission shaft (8) is connected to the inner rotor (4); the transmission shaft (8) drives the inner rotor (4) to rotate; the outer rotor (3) is on the outer ring of the inner rotor (4) and meshes with the inner rotor (4); a feed cavity (17) is formed on the lower shell (2); a discharge cavity (21) is formed on the upper shell (15); one end of a feed pipe (6) is connected to the discharge cavity (21); and the other end is connected to a discharge channel (20) on a discharge tray (14). The outer tube (12) is provided with a discharge port (19), which is connected to a discharge channel (20). A plurality of feed holes (18) are provided on a lower cover (16). The submersible corrosion-resistant rotor pump is placed in the feed liquid. The motor (10) rotates, driving the inner rotor (4) and the outer rotor (3) to rotate. The rotation of the inner rotor (4) and the outer rotor (3) presses the feed liquid in the feed chamber (17) into the feed pipe (6) of the discharge chamber (21). The feed liquid passes through the feed pipe (6) and the discharge channel (20) and is discharged from the discharge port (19).

2. The submersible corrosion-resistant rotor pump according to claim 1, characterized in that: The submersible corrosion-resistant rotor pump further comprises: a liquid level switch (1), which is mounted at the lower end of the lower housing (2).

3. The submersible corrosion-resistant rotor pump according to claim 2, characterized in that: The discharge chamber (21) and the feed chamber (17) are respectively opened at symmetrical positions of the upper shell (15) and the lower shell (2) symmetrical to the transmission shaft (8).

4. The submersible corrosion-resistant rotor pump according to claim 3, characterized in that: The discharge cavity (21) and the feed cavity (17) are arc-shaped.

5. The submersible corrosion-resistant rotor pump according to claim 4, characterized in that: There are three support shafts (7), which are evenly fixed on the circumference between the single machine flange (13) and the discharge tray (14).

6. The submersible corrosion-resistant rotor pump according to claim 5, characterized in that: The materials of the lower shell (2), the outer rotor (3), the inner rotor (4), the outer shell (5), the feed pipe (6), the upper shell (15), the transmission shaft (8), the outer tube (12), the discharge tray (14) and the lower cover (16) are 904 stainless steel, EEK or UPVC.

7. The submersible corrosion-resistant rotor pump according to claim 6, characterized in that: The cross-sections of the feed cavity (17) and the discharge cavity (21) are both crescent-shaped.

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