Shielding circulating pump

Abstract

The utility model discloses a shielding circulating pump which comprises a connecting base, the top of the connecting base is connected with a shell through a plurality of screws, the inner wall of the shell is fixedly connected with a shielding sleeve, the connecting base is fixedly connected with a first waterproof bearing, and an inner ring of the first waterproof bearing is fixedly connected with a hollow pump shaft. A filtering mechanism is arranged on the shell; the filtering mechanism comprises a sealing cover welded to the top of the connecting base, the bottom of the sealing cover is fixedly connected with an isolation hood, and the bottom of the isolation hood is connected with a second waterproof bearing in a penetrating mode. According to the shielding circulating pump, boiler water entering the shielding sleeve through the hollow pump shaft can be filtered through the arranged filtering mechanism, so that residual particle impurities in the boiler water are prevented from entering the shell, the failure rate is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler water circulation, in particular to a shielded circulation pump. Background Art

[0002] Boiler water circulation refers to the circulation of water and steam-water mixture in the boiler evaporation heating surface, which is divided into natural circulation and forced circulation. Natural circulation refers to the circulation maintained by the density difference between water and steam-water mixture; forced circulation refers to the circulation maintained by the pressure head of the water pump in the loop. Normal water circulation can ensure timely and reliable cooling of the boiler evaporation heating surface, which is one of the basic conditions for safe operation of the boiler. At this time, a circulating pump is needed.

[0003] Publication No. CN207634335U discloses a shielded circulation pump, which solves the problem of the D-shaped structure of the end of the fixed shaft in the prior art. The technical solution adopted is: one end of the fixed shaft is inserted into the assembly hole of the shield sleeve, and the other end is inserted into the assembly hole of the pump body, and at least one end of the fixed shaft forms a rotation-stopping fit with the corresponding assembly hole through a clamp. Its effect is: the end of the fixed shaft and the main body of the fixed shaft have the same structure (usually cylindrical), the shaft hole of the corresponding thrust component matches the end structure of the fixed shaft, and does not need to be processed into a D-shaped structure, which not only simplifies the product structure, simplifies the processing steps, improves the yield rate, and reduces the manufacturing cost, but also can form a proper role in limiting axial movement.

[0004] However, the circulating pump has the following shortcomings. When the circulating pump is used to circulate the boiler water, there are often residual debris and particulate impurities in the boiler water. If they enter the circulating pump, they are easily retained. After long-term use, they are easily accumulated and blocked, affecting the normal operation of its internal components.

[0005] Therefore, the utility model provides a shielded circulation pump to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a shielded circulation pump to solve the above problems.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a shielded circulation pump, including a connecting seat, the top of the connecting seat is connected to a shell through a plurality of screws, the inner wall of the shell is fixedly connected to a shielding sleeve, the connecting seat is fixedly connected to a first waterproof bearing, the inner ring of the first waterproof bearing is fixedly connected to a hollow pump shaft, and a filtering mechanism is provided on the shell;

[0008] The filtering mechanism includes a closing cover welded to the top of the connecting seat, an isolation cover is fixedly connected to the bottom of the closing cover, a second waterproof bearing is penetrated and connected to the bottom of the isolation cover, an inner ring of the second waterproof bearing is connected to the outer wall of the hollow pump shaft, a plurality of water-permeable holes are opened on the isolation cover, and an annular filter is fixedly connected to the inner wall of the isolation cover.

[0009] Preferably, a cleaning hole is provided on the closing cover, an inner screw ring is fixedly connected to the cleaning hole, a screw cap is provided on the top of the closing cover, an outer screw plug is fixedly connected to the bottom of the screw cap, and the bottom end thread of the outer screw plug extends into the inner screw ring. The cleaning hole, inner screw ring and outer screw plug can be used together to facilitate cleaning or exhausting of the interior of the isolation cover, which is convenient for use.

[0010] Preferably, a sealing ring is fixedly connected in the cleaning hole, and the inner wall of the sealing ring contacts the outer wall of the external screw plug. The connecting gap between the cleaning hole and the external screw plug can be sealed by the provided sealing ring.

[0011] Preferably, a stator is fixedly connected inside the shell, a winding is fixedly connected inside the shell, a rotor is fixedly sleeved on the outer wall of the hollow pump shaft, and a controller is fixedly connected to one side of the shell. The stator, winding, rotor and controller are used in combination to conveniently control the rotation of the hollow pump shaft.

[0012] Preferably, the bottom of the connecting seat is connected to the pump casing by a plurality of screws, the bottom end of the hollow pump shaft extends into the pump casing, an impeller is fixedly sleeved on the hollow pump shaft, a plurality of connecting holes are opened on the connecting seat, the top opening of the connecting hole is connected to the interior of the shell shielding sleeve, the bottom opening of the connecting hole is connected to the interior of the pump casing, and a plurality of filter screens are fixedly connected to the bottom of the connecting seat, and the water flow can be conveniently driven by the use of the arranged pump casing, impeller, connecting hole and filter screen.

[0013] Preferably, two symmetrically distributed connecting pipes are connected through the outer wall of the pump casing, and the outer wall of the connecting pipe is fixedly connected with a connecting flange. The pump casing can be conveniently connected to the boiler pipeline by using the connecting pipe and the connecting flange, thereby conveniently driving the circulation of boiler water.

[0014] Preferably, the bottom of the pump housing is fixedly connected to a support platform, and the bottom of the support platform is fixedly connected to a base, and the pump housing can be conveniently installed and fixed by using the support platform and the base in combination.

[0015] Beneficial Effects

[0016] The utility model provides a shielded circulation pump. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The shielded circulation pump can filter the boiler water that enters the shielding sleeve through the hollow pump shaft through the provided filtering mechanism, thereby preventing the residual particulate impurities in the boiler water from entering the shell, thereby reducing the failure rate and increasing the service life.

[0018] (2) The shielded circulation pump can conveniently clean the impurity particles filtered inside the isolation cover through the cleaning hole set on the closing cover, and the maintenance method is simple. At the same time, the cleaning hole can be closed by the set screw cap and external screw plug, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0020] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of part A;

[0022] Figure 4 It is a schematic diagram of the explosion installation structure of the closing cover in the utility model.

[0023] In the figure: 1. connecting seat; 2. shell; 3. shielding sleeve; 4. first waterproof bearing; 5. hollow pump shaft; 6. closing cover; 7. isolation cover; 8. second waterproof bearing; 9. water-permeable hole; 10. annular filter; 11. cleaning hole; 12. inner screw ring; 13. screw cap; 14. outer screw plug; 15. sealing ring; 16. stator; 17. winding; 18. rotor; 19. controller; 20. pump casing; 21. impeller; 22. connecting hole; 23. connecting pipe; 24. connecting flange; 25. support platform; 26. base. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] See also Figures 1 to 4A shielded circulation pump comprises a connecting seat 1, the top of the connecting seat 1 is connected to a shell 2 by a plurality of screws, a shielding sleeve 3 is fixedly connected to the inner wall of the shell 2, the shielding sleeve 3 is made of stainless steel, a first waterproof bearing 4 is fixedly connected to the connecting seat 1, a hollow pump shaft 5 is fixedly connected to the inner ring of the first waterproof bearing 4, and a filtering mechanism is arranged on the shell 2;

[0027] The filtering mechanism includes a closing cover 6 welded to the top of the connecting seat 1, an isolating cover 7 is fixedly connected to the bottom of the closing cover 6, a second waterproof bearing 8 is penetrated and connected to the bottom of the isolating cover 7, the inner ring of the second waterproof bearing 8 is connected to the outer wall of the hollow pump shaft 5, a plurality of water-permeable holes 9 are provided on the isolating cover 7, and an annular filter screen 10 is fixedly connected to the inner wall of the isolating cover 7; a cleaning hole 11 is provided on the closing cover 6, an inner screw ring 12 is fixedly connected to the cleaning hole 11, a screwing cap 13 is arranged above the closing cover 6, an outer screw plug 14 is fixedly connected to the bottom of the screwing cap 13, and the bottom end thread of the outer screw plug 14 extends into the inner screw ring 12; a sealing ring 15 is fixedly connected to the cleaning hole 11, and the sealing ring 15 is made of rubber material, and the inner wall of the sealing ring 15 contacts the outer wall of the outer screw plug 14.

[0028] Embodiment 2:

[0029] See also Figures 1 to 4 This embodiment provides a technical solution based on the first embodiment: a stator 16 is fixedly connected in the housing 2, a winding 17 is fixedly connected in the housing 2, a rotor 18 is fixedly sleeved on the outer wall of the hollow pump shaft 5, and a controller 19 is fixedly connected on one side of the housing 2; a pump housing 20 is connected to the bottom of the connecting seat 1 by multiple screws, the bottom end of the hollow pump shaft 5 extends into the pump housing 20, an impeller 21 is fixedly sleeved on the hollow pump shaft 5, a plurality of connecting holes 22 are opened on the connecting seat 1, the top opening of the connecting hole 22 is connected to the inside of the shielding sleeve 3 of the housing 2, the bottom opening of the connecting hole 22 is connected to the inside of the pump housing 20, and a plurality of filter screens are fixedly connected to the bottom of the connecting seat 1; two symmetrically distributed connecting pipes 23 are connected through the outer wall of the pump housing 20, and a connecting flange 24 is fixedly connected to the outer wall of the connecting pipe 23; a support platform 25 is fixedly connected to the bottom of the pump housing 20, and a base 26 is fixedly connected to the bottom of the support platform 25.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Working principle: When in use, the connecting pipe 23 is connected to the water pipe of the boiler through two connecting flanges 24. After the boiler water enters, it will fill the pump casing 20 and then enter the shielding sleeve 3 through the hollow pump shaft 5 and the connecting hole 22. Then, the stator 16 and the winding 17 are started to work through the controller 19, driving the rotor 18 to rotate. The rotor 18 drives the impeller 21 to rotate through the hollow pump shaft 5, so that the boiler water circulates. After the boiler water enters the isolation cover 7 through the hollow pump shaft 5, it will flow out through the water permeable hole 9. At this time, the annular filter screen 10 can filter the impurity particles. When cleaning is needed, you only need to twist the screw cap 13. The screw cap 13 drives the outer screw plug 14 to rotate, so that it is separated from the inner screw ring 12. At this time, the cleaning hole 11 is completely exposed and the inside of the isolation cover 7 can be cleaned.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A canned circulation pump, comprising a connecting seat (1), characterized in that: The top of the connecting seat (1) is connected to a housing (2) via a plurality of screws, a shielding sleeve (3) is fixedly connected to the inner wall of the housing (2), a first waterproof bearing (4) is fixedly connected to the connecting seat (1), an inner ring of the first waterproof bearing (4) is fixedly connected to a hollow pump shaft (5), and a filtering mechanism is provided on the housing (2); The filtering mechanism comprises a closing cover (6) welded to the top of the connecting seat (1); the bottom of the closing cover (6) is fixedly connected to an isolation cover (7); the bottom of the isolation cover (7) is penetrated by a second waterproof bearing (8); the inner ring of the second waterproof bearing (8) is connected to the outer wall of the hollow pump shaft (5); a plurality of water-permeable holes (9) are provided on the isolation cover (7); and the inner wall of the isolation cover (7) is fixedly connected to an annular filter screen (10).

2. A shielded circulation pump according to claim 1, characterized in that: The closure cover (6) is provided with a cleaning hole (11), an inner screw ring (12) is fixedly connected to the cleaning hole (11), a screw cap (13) is arranged above the closure cover (6), an outer screw plug (14) is fixedly connected to the bottom of the screw cap (13), and the bottom end of the outer screw plug (14) is threadedly extended into the inner screw ring (12).

3. A shielded circulation pump according to claim 2, characterized in that: A sealing ring (15) is fixedly connected inside the cleaning hole (11), and the inner wall of the sealing ring (15) is in contact with the outer wall of the external screw plug (14).

4. A shielded circulation pump according to claim 1, characterized in that: A stator (16) is fixedly connected inside the housing (2), a winding (17) is fixedly connected inside the housing (2), a rotor (18) is fixedly sleeved on the outer wall of the hollow pump shaft (5), and a controller (19) is fixedly connected to one side of the housing (2).

5. A canned circulation pump according to claim 1, characterized in that: The bottom of the connecting seat (1) is connected to the pump casing (20) by a plurality of screws, the bottom end of the hollow pump shaft (5) extends into the pump casing (20), an impeller (21) is fixedly sleeved on the hollow pump shaft (5), a plurality of connecting holes (22) are provided on the connecting seat (1), the top openings of the connecting holes (22) are connected to the inside of the shielding sleeve (3) of the housing (2), the bottom openings of the connecting holes (22) are connected to the inside of the pump casing (20), and a plurality of filter screens are fixedly connected to the bottom of the connecting seat (1).

6. A canned circulation pump according to claim 5, characterized in that: Two symmetrically distributed connecting pipes (23) are connected through the outer wall of the pump housing (20), and a connecting flange (24) is fixedly connected to the outer wall of the connecting pipe (23).

7. A canned circulation pump according to claim 5, characterized in that: The bottom of the pump housing (20) is fixedly connected to a support platform (25), and the bottom of the support platform (25) is fixedly connected to a base (26).

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