Pump head, sealed oil chamber for pump and submersible sand pump

Abstract

The utility model provides a pump head, a sealing oil chamber for a pump and a submersible sand pump, the submersible sand pump can comprise the pump head and the sealing oil chamber for the pump, the submersible sand pump further comprises a shell assembly, a sealing assembly, a sand isolation gland, a motor, an impeller and a base, the base is connected to the lower end of the shell assembly, and the sealing assembly is arranged above the base; the motor is arranged above the sealing assembly, the impeller is arranged between the sealing assembly and the base, and a motor rotating shaft penetrates through the sealing assembly to be connected with the impeller. The sand isolation gland is arranged on the motor rotating shaft in a sleeving manner and is arranged between the impeller and the sealing assembly; the sand separation gland is provided with a mounting groove, and the sealing assembly is located in the mounting groove; a guide channel is arranged between the sealing assembly and the sand isolation gland and communicates with the outside. The guide channel can guide fluid entering the mounting groove of the sand separation gland, the fluid can be discharged out of the submersible sand pump along the guide channel, the probability that the interior of the motor makes contact with the fluid and is corroded is reduced, and the service life of the submersible sand pump is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and in particular to a pump head, a sealing oil chamber for a pump, and a submersible sand pump. Background Art

[0002] Submersible sand pumps are used to extract and transport various yellow sands and mineral sands. When the submersible sand pumps are working, the fine sand will have a certain impact on the seals installed inside the submersible sand pumps, which will cause liquid or gas to enter the motor, making the motor easily damaged and affecting the service life of the submersible sand pumps.

[0003] However, in the prior art, there is no guide channel to prevent liquid and gas leakage in the submersible sand pump. When the sealing structure is forced open by mud and sand, the gas and liquid cannot be discharged quickly and quickly, and are easily retained in the submersible sand pump, thereby increasing the probability of contact with the motor and causing a significant impact on the service life of the submersible sand pump. Utility Model Content

[0004] In view of this, in view of the technical problem that the submersible sand pump in the above-mentioned prior art is not provided with a guide channel for preventing fluid leakage, which easily leads to the fluid not being discharged in time and contacting the motor, thereby easily causing damage to the motor, the present application provides a pump head, a sealing oil chamber for a pump and a submersible sand pump. By using the present application, the fluid entering the sealing structure can be discharged to the external guide channel, so as to reduce the probability of the fluid contacting the inside of the motor and improve the service life of the submersible sand pump.

[0005] In a first aspect, the present application provides a pump head, comprising an impeller and a base, wherein a pressure chamber is provided on the base, and the impeller is arranged in the pressure chamber; wherein a protective shell is provided on the outer surface of one side of the blades of the impeller;

[0006] The protective shell is made of plastic material.

[0007] Preferably, the impeller is provided with a mounting hole, and the mounting hole passes through the upper and lower end surfaces of the chassis of the impeller;

[0008] The protective shell is provided with a mounting post, and the mounting post is inserted into the mounting hole to achieve the connection between the protective shell and the impeller.

[0009] Preferably, a limit block is provided at the end of the mounting column, and the limit block is used to limit the mounting column in the mounting hole;

[0010] Wherein, at least two limit blocks are connected;

[0011] The blade ends of the impeller are provided with reinforcing columns, and the protective shell is provided with a socket that cooperates with the reinforcing columns;

[0012] A wear-resistant layer is arranged on a surface of the base facing the impeller.

[0013] In a second aspect, the present application provides a sealed oil chamber for a pump, comprising a pump housing assembly and a sealing assembly, wherein a sealed oil chamber is formed between the housing assembly and the sealing assembly;

[0014] The sealing component is provided with an oil filling port, and the oil filling port is arranged on the side wall of the sealing oil chamber.

[0015] Preferably, the sealing assembly is provided with an oil inlet channel, and the oil inlet channel extends axially downward;

[0016] The oil filling port is arranged at one end of the oil inlet passage connected to the outside.

[0017] In a third aspect, the present application provides a submersible sand pump, comprising a housing assembly, a sealing assembly, a sand isolation gland, a motor, an impeller and a base, wherein the base is connected to the lower end of the housing assembly, and the sealing assembly is arranged above the base;

[0018] The motor is arranged above the sealing assembly, the impeller is arranged between the sealing assembly and the base, and the motor shaft passes through the sealing assembly and is connected to the impeller;

[0019] Wherein, the sand-isolating gland is arranged between the impeller and the sealing assembly;

[0020] The sand isolation gland is provided with a mounting groove, and the sealing assembly is at least partially located in the mounting groove;

[0021] A guide channel is provided between the sealing assembly and the sand isolation gland, and the guide channel is communicated with the outside.

[0022] Compared with the prior art, the submersible sand pump of the present application is provided with a sealing assembly and a sand-isolating pressure cover. The sand-isolating sealing disc can block fine sand. The sealing assembly is arranged between the motor and the sand-isolating pressure cover. A sealing oil chamber is formed between the sealing assembly and the housing assembly. A guide channel is provided between the sealing assembly and the sand-isolating pressure cover. The guide channel is connected to the outside and can provide guidance for the fluid entering the installation groove of the sand-isolating pressure cover, so that the fluid can be discharged out of the submersible sand pump along the guide channel, avoiding the fluid from being retained in the installation groove and being unable to be discharged. The probability of the fluid contacting the inside of the motor can be effectively reduced, thereby reducing the probability of the inside of the motor being corroded, so as to improve the service life of the submersible sand pump.

[0023] Preferably, the submersible sand pump further comprises the pump head described in any of the above embodiments.

[0024] Preferably, the submersible sand pump further comprises a pump sealing oil chamber as described in any of the above embodiments.

[0025] Preferably, a limiting portion is provided at the lower end of the sealing assembly, and the limiting portion extends axially downward;

[0026] The bottom of the sand-isolating gland is provided with a sleeve portion, and the sleeve portion is provided with a socket through which the rotating shaft of the power supply machine passes;

[0027] The sleeve portion extends upward in the axial direction, and the limiting portion is sleeved outside the sleeve portion;

[0028] The outer diameter of the sleeve portion is smaller than the inner diameter of the limiting portion.

[0029] Preferably, the sealing assembly comprises a sealing gland and a sealing sleeve; the inner side of the sealing gland is sleeved on the motor shaft;

[0030] The lower end of the sealing sleeve is connected to the upper end of the outer wall of the sealing gland, and the upper end of the sealing sleeve extends along the axial direction to be connected to the housing assembly.

[0031] Preferably, the sand isolation gland is provided with an outer retaining ring, and the outer retaining ring extends axially upward;

[0032] The inner diameter of the outer retaining ring is greater than the outer diameter of the sealing assembly.

[0033] Preferably, the sand isolation gland is provided with support ribs, and the support ribs extend radially;

[0034] The support rib is arranged along the axial direction, and the upper end of the support rib is lower than the upper end of the outer retaining ring.

[0035] Preferably, the sand isolation gland is provided with a matching opening corresponding to the oil filling port.

[0036] Preferably, the upper end of the base is connected to the sand isolation gland;

[0037] The base and the sand-isolating gland form a pressure chamber for the impeller to be placed;

[0038] The bottom of the base is provided with a water inlet connected to the pressure chamber;

[0039] A drainage port communicating with the pressure chamber is provided on the side wall of the base.

[0040] The present application provides a pump head, an oil seal chamber for a pump and a submersible sand pump. A protective shell is provided on the impeller in the pump head to protect the impeller. The oil filling port of the oil seal chamber for the pump is provided on the side wall of the sealing gland, and the oil filling port is connected to the outside, so that oil filling is more convenient. By providing an oil inlet channel, the oil inlet channel extends downward, and the oil filling port is located at the end of the oil inlet channel, so that the oil filling port is moved downward, so that the gas in the sealing oil chamber can be gathered in the sealing oil chamber, the pressure of the sealing oil chamber is increased, and the fluid can be effectively prevented from entering the sealing oil chamber. In the submersible sand pump, a guide channel is provided between the sand isolation gland and the sealing assembly, and the sealing assembly is located between the motor and the sand isolation gland, so that the fluid entering the sand isolation gland can be guided and discharged in time, and the fluid is prevented from contacting the motor, thereby improving the service life of the submersible sand pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of a submersible sand pump provided in one embodiment of the present application;

[0042] Figure 2 It is a schematic diagram of the axial cross-sectional structure of a submersible sand pump provided in one embodiment of the present application;

[0043] Figure 3 yes Figure 2 A schematic diagram of a local A enlargement;

[0044] Figure 4 It is a schematic diagram of the axial section structure of a submersible sand pump provided in one embodiment of the present application;

[0045] Figure 5 It is a schematic diagram of the three-dimensional structure of the sand isolation gland provided in one embodiment of the present application;

[0046] Figure 6 It is a schematic diagram of the three-dimensional structure of a sealing gland provided in one embodiment of the present application;

[0047] Figure 7 yes Figure 4 A schematic diagram of the enlarged part B in FIG.

[0048] Figure 8 It is a schematic diagram of the three-dimensional structure of a protective shell provided in one embodiment of the present application.

[0049] Figure numerals: 1. submersible sand pump; 2. motor; 3. impeller; 4. motor shaft; 5. upper shell; 6. bearing gland; 7. sand isolation gland; 8. sealing gland; 9. sealing sleeve; 10. sealing oil chamber; 11. oil filling port; 12. oil inlet channel; 13. guide channel; 14. limiting part; 15. sleeve joint; 16. outer retaining ring; 17. supporting rib; 18. matching port; 19. pressure chamber; 20. base; 21. filter seat; 22. filter port; 23. water inlet; 24. drain port; 25. decorative cover; 26. protective shell; 27. mounting hole; 28. mounting column; 29. ​​reinforcing column; 30. wear-resistant layer; 31. limiting block. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0051] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] Those skilled in the art should understand that, in the disclosure of the present application, the orientation or positional relationship indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0053] The present application is further described in detail below in conjunction with the accompanying drawings. Figures 1 to 8 illustrate.

[0054] First aspect

[0055] The present application provides a pump head, such as Figure 4 , Figure 7As shown, the pump head can be used in the water pump of the prior art; in this embodiment, the pump head is the end part of the water pump including the impeller 3, which includes the impeller 3 and the base 20, the base 20 is provided with a pressure chamber 19 for placing the impeller 3, and the upper end of the impeller 3 is connected to the motor 2; the lower end of the base 20 is provided with a water inlet 23, and the side wall of the base 20 is provided with a liquid guide channel connected with the liquid outlet of the water pump, the impeller 3 rotates in the pressure chamber 19 of the base 20 to form a negative pressure, and the external fluid is drawn into the pressure chamber 19 from the liquid inlet, and after being driven by the impeller 3, it flows from the liquid guide channel to the drain 24; and in this embodiment, the protective shell 26 is covered on the outer side of one end of the impeller 3 with blades, which protects the blades of the impeller 3 and can strengthen the structure of the impeller 3 and increase the service life of the impeller 3; especially for some sand pumping pumps, by providing a protective shell 26 on the impeller 3, the wear of the impeller 3 by fine sand can be effectively reduced, thereby increasing the service life of the sand pumping pump.

[0056] like Figure 4 , Figure 7 As shown, the protective shell 26 fully covers and protects the side of the impeller 3 facing the liquid inlet, and the inner wall of the protective shell 26 fits the outer wall of the impeller 3; the protective shell 26 is preferably made of plastic material. During production, the impeller 3 can be directly placed in the mold, and the liquid plastic material can be poured into the mold, and the protective shell 26 can be formed and connected to the impeller 3 after waiting for cooling; the selection of such a production material can match the above-mentioned production method, thereby shortening the construction period and simplifying the production.

[0057] In order to improve the connection stability between the protective shell 26 and the impeller 3, as Figure 7 As shown, the chassis of the impeller 3 is provided with a mounting hole 27, which passes through the upper and lower end surfaces of the chassis of the impeller 3, and the protective shell 26 is provided with a mounting column 28 that matches the mounting hole 27, so that the protective shell 26 can pass through the chassis of the impeller 3, thereby increasing the connection strength between the protective shell 26 and the impeller 3. Further, as Figure 7 As shown, the aperture of the mounting hole 27 is the same as the outer diameter of the mounting column 28, and a limit block 31 is provided at the end of the mounting column 28. The outer diameter of the limit block 31 is larger than the aperture of the mounting hole 27, and then the mounting column 28 is limited, so that the mounting column 28 cannot fall out of the mounting hole 27, which can further enhance the connection stability between the protective shell 26 and the impeller 3.

[0058] like Figure 8 As shown, a plurality of limit blocks 31 are provided on the protective shell 26, and among the plurality of limit blocks 31, at least two limit blocks 31 are connected to each other, thereby increasing the contact area between the limit blocks 31 and the impeller 3, so that the limiting effect of the limit blocks 31 is further enhanced, which can effectively prevent the protective shell 26 from escaping from the impeller 3 and ensure the connection stability between the protective shell 26 and the impeller 3.

[0059] Preferably, a limit groove can be provided on the mounting hole 27, and the limit groove is used to install the limit block 31. The depth of the limit groove is greater than or equal to the height of the limit block 31, so that the limit block 31 can fall into the limit groove, so that the upper end surface of the impeller 3 base is relatively flat, and the limit groove also plays a limiting role on the limit block 31, which can prevent the limit block 31 from moving at will, thereby increasing the stability of the connection between the protective shell 26 and the impeller 3.

[0060] Further, such as Figure 7 As shown, a reinforcing column 29 is provided at the lower end of the blade of the impeller 3. The reinforcing column 29 protrudes downward, and a socket that cooperates with the reinforcing column 29 is provided on the protective shell 26. On the one hand, it is convenient to introduce liquid material into the part of the mold corresponding to the socket, and on the other hand, it can increase the connection firmness between the blade itself and the protective shell 26.

[0061] Further, such as Figure 4 , Figure 7 As shown, the base 20 is provided with a wear-resistant layer 30 on the end surface of one side facing the impeller 3. The wear-resistant layer 30 is also made of plastic material, which protects the base 20 and can improve the wear resistance and service life of the base 20.

[0062] Second aspect

[0063] The present application provides a sealed oil chamber for a pump, the sealed oil chamber 10 is used in a water pump, the pump is provided with a housing assembly and a sealing assembly, a sealed oil chamber 10 is formed between the housing assembly and the sealing assembly, and the sealed oil chamber 10 is used to place oil, such as Figures 2 to 4 , Figure 6 As shown, the sealing assembly is provided with an oil filling port 11, which is arranged on the side wall of the sealing assembly. One end of the oil filling port 11 is connected to the outside, and the other end is connected to the sealing oil chamber 10, so that oil filling is more convenient and oil filling can be achieved without disassembling the water pump, making the use and maintenance procedures of the pump simpler.

[0064] Further, such as Figure 4 , Figure 6As shown, the sealing component is provided with an oil inlet channel 12, one end of the oil inlet channel is connected to the sealing oil chamber 10, and the other end is connected to the oil filling port 11, that is, the other end of the oil inlet channel 12 is connected to the outside. In this embodiment, the oil inlet channel 12 is L-shaped, which includes an axial section and a radial section. The axial section is connected to the radial section. The axial section is arranged along the axial direction, and the radial section is arranged along the radial direction. One end of the axial section is connected to the sealing oil chamber 10, and the other end is connected to the radial section. The other end of the radial section is the oil filling port 11; the axial section is connected to the lower end of the sealing oil chamber 10, that is, the oil inlet channel 12 extends the oil filling port 11 axially downward. When oil is introduced , the oil enters the sealed oil chamber 10 from bottom to top, which makes the upper end of the sealed oil chamber 10 more sealed than the lower end, and due to the density characteristics of gas and liquid, the gas will be located at the upper end of the liquid. Therefore, in the sealed oil chamber 10, the gas will be better gathered in the sealed oil chamber 10, and it is difficult to pass through the liquid and be discharged outward from the oil inlet channel 12. Therefore, the air pressure in the sealed oil chamber 10 is relatively large, which makes it difficult for the gas at the lower end of the sealing component to enter the sealed oil chamber 10, and further provides auxiliary protection for the interior of the motor 2 arranged at the upper end of the sealing component, reducing the risk of destructive power of the motor 2 caused by leaking water.

[0065] like Figure 4 As shown, a sealing plug is provided at the end of the oil filling port 11, and the sealing plug can be inserted into the oil inlet channel 12 to seal the oil inlet channel 12 and prevent oil leakage; the sealing plug and the oil inlet channel 12 are detachably connected to facilitate refueling for the staff.

[0066] The third aspect

[0067] The present application provides a submersible sand pump, which can pump water in muddy water. In this embodiment, it can be further expanded on the basis of any embodiment of the pump head provided in the first aspect, and can also be further expanded on the basis of any embodiment of the pump sealing oil chamber 10 provided in the second aspect.

[0068] like Figures 1 to 4As shown, the submersible sand pump 1 includes a housing assembly, a motor 2, an impeller 3, a base 20, a sealing assembly and a sand isolation sealing disk. The housing assembly includes an upper housing 5, a bearing cover 6 and an upper bearing seat. The upper bearing seat is connected to the upper end of the upper housing 5. The motor 2 is arranged in the upper housing 5. The motor 2 is located at the upper end of the sealing assembly. The upper end of the motor 2 shaft 4 is connected to the upper bearing seat. The bearing cover 6 is connected to the lower end of the motor 2 and is sleeved on the motor 2 shaft 4. The bearing cover 6 is made of metal material. The bearing cover 6 is in contact with the lower end wall and part of the outer side wall of the motor 2 to protect and support the motor 2. The side wall of the bearing cover 6 is located between the upper housing 5 and the motor 2; the sealing assembly is arranged below the bearing cover 6. The rotating shaft 4 passes through the bearing cover 6 and the sealing assembly in sequence, the lower end of the upper shell 5 is bent and extended inwardly in the radial direction, the upper end of the sealing assembly has an extension portion extending radially outward, the lower end surface of the extension portion is fitted with the bent portion of the upper shell 5, that is, the sealing assembly is hung on the lower end of the upper shell 5; and the bearing cover 6 and the sealing assembly are connected by bolts, thereby realizing the connection and fixation of the bearing cover 6 and the sealing assembly; there is a space between the inner wall of the sealing assembly and the rotating shaft 4 of the motor 2, and a sealing oil chamber 10 for placing oil liquid is formed between the inner wall of the sealing assembly and the lower wall of the bearing cover 6. The structural principle of the sealing oil chamber 10 in the present application is the same as the structural principle of the sealing oil chamber 10 provided in the second aspect, and will not be repeated here.

[0069] like Figure 3 , Figure 4 As shown, the sand-shielding gland 7 is arranged at the lower end of the sealing assembly, and a jack is provided on the sand-shielding gland 7 for the rotation shaft 4 of the power supply machine 2 to pass through. A sleeve portion 15 extending axially upward is provided at the center of the sand-shielding gland 7, and the sleeve portion 15 is located at the upper end of the bottom of the sand-shielding gland 7. The sleeve portion 15 is located above the impeller 3, and the shape of the sleeve portion 15 matches the end of the impeller 3. A sealing retaining ring is provided at the lower end of the sleeve portion 15 to play a sealing role and prevent fine sand from easily passing through the sand-shielding gland 7; and the outer diameter of the sleeve portion 15 is smaller than the outer diameter of the sand-shielding gland 7, and an outer retaining ring 16 extending axially upward is provided on the outer side of the sand-shielding gland 7, and the axial height of the sleeve portion 15 is lower than the outer retaining ring 16, and in the radial direction, there is a space between the sleeve portion 15 and the outer retaining ring 16, thereby forming a sand-shielding gland. The sealing assembly is at least partially located in the mounting groove of the gland 7, the axial height of the sealing assembly is lower than the outer retaining ring 16, and the outer diameter of the sealing assembly is smaller than the inner diameter of the outer retaining ring 16, so that a second gap is provided between the outer wall of the sealing assembly and the inner diameter of the outer retaining ring 16, and correspondingly, a gap is also provided between the outer retaining ring 16 and the bearing gland 6, so that the second gap is connected to the outside; and, a limiting portion 14 is provided on the sealing assembly, and the limiting portion 14 is arranged at the bottom lower end of the sealing assembly, and the limiting portion 14 extends downward in the axial direction, and the limiting portion 14 corresponds to the sleeve connection portion 15, and the limiting portion 14 is sleeved on the sleeve connection portion 15, so that a better connection can be formed between the sealing assembly and the sand isolation gland 7, so that the structure of the submersible sand pump 1 is more stable; further, as Figure 6 As shown, the limiting portion 14 includes a plurality of concentric arc pieces, and there is an air guide interval between the concentric arc pieces. In the axial direction, there is a first gap between the limiting portion 14 and the sleeve portion 15. These intervals form a guide channel 13, as shown in FIG. Figure 4 As shown, when gas or liquid leaks in the submersible sand pump 1, it is discharged through the guide channel 13 to the outside of the pump body via the route Q; when fine sand destroys the seal between the sand isolation gland 7 and the rotating shaft 4 of the motor 2, the gas or liquid will enter the top of the sand isolation gland 7 through the gap between the sand isolation gland 7 and the rotating shaft 4 of the motor 2, and then pass through the first gap, the air guide gap and the second gap in sequence, thereby being discharged from the submersible sand pump 1 into the external environment, so that the gas or liquid leaked into the top of the sand isolation gland 7 can be discharged in time through the air guide channel, avoiding being trapped in the submersible sand pump 1, reducing the time and probability of contact with the inside of the motor 2, thereby reducing the risk of destructiveness to the inside of the motor 2, and thus increasing the service life of the submersible sand pump 1.

[0070] like Figure 4 As shown, since the sealing assembly is arranged in the installation groove of the sand-shielding pressure cover 7, a matching port 18 corresponding to the oil filling port 11 is provided on the sand-shielding pressure cover 7, so that when the staff fills the oil, they can connect with the oil filling port 11 through the matching port 18 to realize smooth refueling.

[0071] Further, in another optional embodiment of the present application, as Figure 4 , Figure 5 As shown, the sand isolation gland 7 is provided with a support rib 17, which is axially arranged to protrude upward, and the height of the support rib 17 is lower than the height of the outer retaining ring 16. The support rib 17 protrudes radially, and the upper end of the support rib 17 fits with the bent portion of the lower end of the upper shell 5, thereby supporting and limiting the motor 2 to improve the structural stability of the submersible sand pump 1; there are at least two support ribs 17, the support ribs 17 are concentrically arranged, and the multiple support ribs 17 are equidistantly arranged; the outer wall of the support rib 17 can be connected to the outer retaining ring 16, and can also be independently arranged relative to the outer retaining ring 16; in this embodiment, as shown in FIG. Figure 3 , Figure 5 As shown, the sand-isolating pressure cover 7 is also provided with a connecting column, and a connecting hole for the bolt to pass through is provided in the connecting column. Similarly, a matching hole matching with the connecting hole is provided on the sealing assembly, and the bolt can pass through the connecting hole and the matching hole, thereby realizing the axial connection between the sealing assembly and the sand-isolating pressure cover 7.

[0072] Furthermore, the sealing components are further expanded; such as Figure 3 to Figure 4 , Figure 6As shown, the sealing assembly includes a sealing gland 8 and a sealing sleeve 9. The center of the sealing gland 8 is sleeved on the rotating shaft 4 of the motor 2, and the sealing sleeve 9 is sleeved on the outer side of the sealing gland 8. The upper end of the sealing gland 8 is provided with a recessed groove along the axial direction, and the lower end of the sealing sleeve 9 is inserted into the recess, so that the sealing sleeve 9 can be inserted into the sealing gland 8 and the connection area between the sealing gland 8 and the sealing sleeve 9 is increased; Figure 4 As shown, the sealing gland 8 and the sealing sleeve 9 are connected by bolts, so as to realize the connection and fixation between the sealing gland 8 and the sealing sleeve 9; in this embodiment, the oil inlet channel 12, the oil filling port 11, and the limit portion 14 are arranged on the sealing gland 8, and the connecting hole and the extension portion are arranged on the sealing sleeve 9; in this embodiment, the sealing sleeve 9 is made of plastic material, which can effectively shield the bearing gland 6 and the motor 2, and the plastic material of the sealing sleeve 9 has high corrosion resistance, which can effectively reduce the probability of corrosion of metal parts such as the bearing gland 6 and the motor 2, thereby improving the service life of the submersible sand pump 1.

[0073] like Figures 1 to 4 As shown, on the basis of the pump head provided in the first aspect, the pump head is further expanded; the upper end of the base 20 is connected to the lower end of the sand-shielding pressure cover 7, and a cavity for installing the impeller 3 is provided in the base 20. The cavity formed between the base 20 and the sand-shielding pressure cover 7 is a pressure chamber 19. A water inlet 23 is provided at the center of the base 20, and a drain port 24 is provided on the side wall of the base 20. The water inlet 23 and the drain port 24 are both connected to the pressure chamber 19. The impeller 3 generates a negative pressure force in the pressure chamber 19, which draws the fluid from the water inlet 23 into the pressure chamber 19, and then discharges it from the drain port 24 to realize the fluid transportation.

[0074] In this embodiment, if Figure 4 As shown, the wear-resistant layer 20 covers the upper surface of the base 20, and the wear-resistant layer 20 is at least partially in contact with the sand-shielding pressure cover 7; the wear-resistant layer 30 on the base 20 protrudes upward to form an annular protrusion, which is located between the base 20 and the sand-shielding pressure cover 7, and the annular protrusion plays a sealing role between the base 20 and the sand-shielding pressure cover 7.

[0075] like Figure 3 to Figure 4As shown, the base 20 is provided with a decorative cover 25, which is connected to the base 20 by bolts or screws. The decorative cover 25 can protect the sand isolation cover 7, the base 20, etc., so as to improve the service life of the submersible sand pump 1; correspondingly, the decorative cover 25 is provided with an opening corresponding to the oil filling port 11, so as to facilitate the filling of oil into the sealed oil chamber 10; the lower end of the base 20 is provided with a filter seat 21, which is arranged at the lower end of the base 20, and the filter seat 21 and the base 20 are axially connected and fixed by bolts, and the filter seat 21 can raise the water inlet 23 to prevent the debris in the liquid from clogging the water inlet 23; the side wall of the filter seat 21 is provided with a filter port 22, which penetrates the filter seat 21 in the radial direction, and the filter port 22 can filter out larger objects to prevent them from entering the filter seat 21 and clogging the water inlet 23, thereby improving the working efficiency of the submersible sand pump 1.

[0076] In actual use, Figures 2 to 4 As shown, the motor 2 is started, the impeller 3 rotates, and negative pressure is formed in the pressure chamber 19. The fluid passes through the filter port 22 of the filter seat 21 and enters the filter seat 21, then enters the pressure chamber 19 from the water inlet 23, and then flows out from the drain port 24;

[0077] When fine sand destroys the seal between the sand-isolating gland 7 and the rotating shaft 4 of the motor 2, the gas or liquid in the pressure chamber 19 will enter the sand-isolating gland 7, such as Figure 4 As shown, the leaked gas or liquid enters the air guide channel and is discharged to the submersible sand pump 1 as shown in the route Q discharge;

[0078] When refueling is needed, refueling is carried out into the sealed oil chamber 10 through the oil filling port 11 . When refueling, the submersible sand pump 1 does not need to be disassembled, and only the sealing plug blocking the oil filling port 11 needs to be removed.

[0079] It should be noted that the various embodiments of the present application can be arbitrarily combined into a new embodiment if the solutions do not conflict and the technical solutions can coexist.

[0080] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A sealing oil chamber for a pump, characterized in that: It comprises a pump housing assembly and a sealing assembly, wherein a sealing oil chamber (10) is formed between the housing assembly and the sealing assembly; The sealing component is provided with an oil filling port (11), and the oil filling port (11) is arranged on the side wall of the sealing oil chamber (10).

2. The pump seal oil chamber according to claim 1, characterized in that: The sealing assembly is provided with an oil inlet passage (12), and the oil inlet passage (12) extends axially downward; The oil filling port (11) is arranged at one end of the oil inlet channel (12) connected to the outside.

3. A pump head, characterized in that: The invention comprises an impeller (3) and a base (20), wherein a pressure chamber (19) is provided on the base (20), and the impeller (3) is arranged in the pressure chamber (19); wherein a protective shell (26) is provided on the outer surface of one side of the blades of the impeller (3); The protective shell (26) is made of plastic material; It also includes a pump sealing oil chamber as described in any one of claims 1 to 2.

4. The pump head according to claim 3, characterized in that: The impeller (3) is provided with a mounting hole (27), and the mounting hole (27) passes through the upper and lower end surfaces of the chassis of the impeller (3); The protective shell (26) is provided with a mounting column (28), and the mounting column (28) is inserted into the mounting hole (27) to achieve the connection between the protective shell (26) and the impeller (3).

5. The pump head according to claim 4, characterized in that: A limiting block (31) is provided at the end of the mounting column (28), and the limiting block (31) is used to limit the mounting column (28) in the mounting hole (27); Wherein, at least two limit blocks (31) are connected; The blade ends of the impeller (3) are provided with reinforcing columns (29), and the protective shell (26) is provided with insertion holes that cooperate with the reinforcing columns (29); A wear-resistant layer (30) is provided on a surface of the base (20) facing the impeller (3).

6. A submersible sand pump, characterized in that: It comprises a housing assembly, a sealing assembly, a sand-isolating gland (7), a motor (2), an impeller (3) and a base (20), wherein the base (20) is connected to the lower end of the housing assembly, and the sealing assembly is arranged above the base (20); The motor (2) is arranged above the sealing assembly, the impeller (3) is arranged between the sealing assembly and the base (20), and the rotating shaft (4) of the motor (2) passes through the sealing assembly and is connected to the impeller (3); Wherein, the sand-isolating gland (7) is arranged between the impeller (3) and the sealing assembly; The sand isolation gland (7) is provided with a mounting groove, and the sealing component is at least partially located in the mounting groove; A guide channel (13) is provided between the sealing component and the sand isolation gland (7), and the guide channel (13) is communicated with the outside; The submersible sand pump (1) further comprises a pump head as claimed in any one of claims 4 to 5; The submersible sand pump (1) further comprises a pump sealing oil chamber as claimed in any one of claims 1 to 2.

7. The submersible sand pump according to claim 6, characterized in that: A limiting portion (14) is provided at the lower end of the sealing component, and the limiting portion (14) extends axially downward; The bottom of the sand-isolating pressure cover (7) is provided with a sleeve portion (15), and the sleeve portion (15) is provided with a socket through which the rotating shaft (4) of the power supply machine (2) passes; The sleeve connection portion (15) extends upward in the axial direction, and the limiting portion (14) is sleeved outside the sleeve connection portion (15); The outer diameter of the sleeve connection portion (15) is smaller than the inner diameter of the limiting portion (14).

8. The submersible sand pump according to claim 6, characterized in that: The sealing assembly comprises a sealing gland (8) and a sealing sleeve (9); the inner side of the sealing gland (8) is sleeved on the rotating shaft (4) of the motor (2); The lower end of the sealing sleeve (9) is connected to the upper end of the outer wall of the sealing gland (8), and the upper end of the sealing sleeve (9) extends in the axial direction to be connected to the housing assembly.

9. The submersible sand pump according to claim 6, characterized in that: The sand isolation gland (7) is provided with an outer retaining ring (16), and the outer retaining ring (16) extends axially upward; The inner diameter of the outer retaining ring (16) is greater than the outer diameter of the sealing assembly.

10. The submersible sand pump according to claim 9, characterized in that: The sand isolation gland (7) is provided with support ribs (17), and the support ribs (17) extend in the radial direction; The support rib (17) is arranged along the axial direction, and the upper end of the support rib (17) is lower than the upper end of the outer retaining ring (16).

11. The submersible sand pump according to claim 7, characterized in that: The sand-isolating gland (7) is provided with a matching opening (18) corresponding to the oil filling opening (11).

12. The submersible sand pump according to claim 6, characterized in that: The upper end of the base (20) is connected to the sand isolation pressure cover (7); The base (20) and the sand-isolating gland (7) form a pressure chamber (19) for the impeller (3) to be placed; The bottom of the base (20) is provided with a water inlet (23) communicating with the pressure chamber (19); A drainage port (24) communicating with the pressure chamber (19) is provided on the side wall of the base (20).

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