Anti-leakage dry-wear-resistant shield pump

Abstract

The utility model discloses a leakproof dry-wear-resistant shield pump which comprises a base, the top of the base is fixedly connected with a shield pump body, the outer side of the top of the shield pump body is fixedly connected with a liquid inlet pipe, the output end of the shield pump body is fixedly connected with a rotating shaft, and the outer side of the base is provided with a sealing mechanism. The sealing mechanism comprises a connecting plate, a moving groove is formed in the connecting plate, and in the leakproof dry-wear-resistant shield pump and the sealing mechanism, the sealing ring is mounted on the outer side of the rotating shaft through the mounting pipe and the connecting rod, so that a gap at the rotating shaft can be effectively blocked, and liquid leakage is prevented. Meanwhile, the sliding block and the moving block are matched with the moving groove, so that the mounting pipe and the sealing ring can move flexibly, and mounting and adjusting are facilitated; a fastening structure composed of the threaded pipe, the threaded rod and the positioning cover can stabilize the position of the installation pipe, it is ensured that the sealing effect is durable and reliable, and the operation safety and stability of equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of shielded pump technology, specifically a leak-proof, dry-wear-resistant shielded pump. Background Technology

[0002] As a leak-free pump, the canned motor pump, with its fully enclosed structure, is widely used in chemical, pharmaceutical, food processing, and nuclear industries, and is especially suitable for conveying flammable, explosive, toxic, valuable, and radioactive liquid media. It fixes the motor rotor and pump impeller on the same shaft, and a shielding sleeve separates the motor rotor and stator, completely isolating the motor from the conveyed medium. This fundamentally solves the leakage problem of traditional pumps, greatly ensuring production safety and environmental friendliness.

[0003] According to the authorized patent "CN202510150207.5", a dry-wear resistant shielded pump includes a pump body, a first wear-resistant sealing assembly, and a second wear-resistant sealing assembly. A pump shaft is disposed inside the pump body. The first wear-resistant sealing assembly is located inside the pump body and installed at one end of the pump shaft. The second wear-resistant sealing assembly is located inside the pump body and installed at the other end of the pump shaft. By employing wear-resistant bushings, wear-resistant bearings, and thrust discs in the first and second wear-resistant sealing assemblies, the wear resistance of the pump body can be effectively improved, especially in working environments with high friction and wear. This results in a longer service life when conveying dry-wearing media and reduced maintenance frequency. The first and second wear-resistant sealing assemblies effectively prevent liquid leakage and ensure that the pressure inside the pump body is maintained.

[0004] In the aforementioned technical solutions, the connection between the shaft and the pump body is a critical weak point in the canned motor pump's seal, particularly regarding sealing performance. Traditional sealing structures often struggle to maintain a good seal under complex operating conditions, making it highly susceptible to liquid leakage from shaft gaps. Leakage not only wastes materials and pollutes the working environment but can also lead to serious safety accidents such as fires, explosions, and poisoning, causing significant economic losses and safety hazards to the company.

[0005] Therefore, this utility model provides a leak-proof, dry-wear-resistant shielded pump. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a leak-proof, dry-wear-resistant shielded pump to solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a leak-proof, dry-wear resistant shielded pump, including a base, a shielded pump body fixedly connected to the top of the base, an inlet pipe fixedly connected to the outer side of the top of the shielded pump body, a rotating shaft fixedly connected to the output end of the shielded pump body, and a sealing mechanism provided on the outer side of the base.

[0008] The sealing mechanism includes a connecting plate with a movable groove inside. A slider is slidably engaged inside the movable groove. A movable block is fixedly connected to the top of the slider. An installation tube is fixedly connected to the top of the movable block. A connecting rod is installed inside the installation tube. A sealing ring is fixedly connected to the top of the connecting rod. An L-shaped plate is fixedly connected to the outside of the movable block. A threaded tube is fixedly connected to the outside of the L-shaped plate. A screw is threadedly connected inside the threaded tube. A positioning cover is fixedly connected to the outside of the screw.

[0009] Preferably, a replacement mechanism is provided between the mounting tube and the connecting rod. The replacement mechanism includes a movable tube, a snap-fit ​​rod is connected inside the movable tube, a compression spring is fixedly connected to the snap-fit ​​rod, and a connection hole is provided inside the connecting rod.

[0010] Preferably, the connecting plate is fixedly connected to the bottom of the shielded pump body, and the moving block is slidably connected to the top of the connecting plate via a slider.

[0011] Preferably, the sealing ring is movably connected to the outside of the rotating shaft via an installation tube and a connecting rod, and the sealing ring and the rotating shaft are on the same plane.

[0012] Preferably, the L-shaped plates are symmetrically distributed on the outside of the moving block, and one side of the L-shaped plates is located on both sides of the connecting plate.

[0013] Preferably, the positioning cover is movably connected to the outside of the L-shaped plate by a screw, and the positioning cover is located between the outside of the L-shaped plate and the connecting plate.

[0014] Preferably, the movable tubes are symmetrically distributed on the outside of the mounting tube, and the snap-fit ​​rod passes through the inner wall of the mounting tube.

[0015] Preferably, the number of connecting holes is the same as that of the snap-fit ​​rod, and the connecting holes are compatible with the snap-fit ​​rod.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) In this leak-proof, dry-wear-resistant shielded pump, the sealing mechanism includes a sealing ring installed on the outside of the rotating shaft via an installation pipe and a connecting rod, which effectively seals the gaps at the rotating shaft and prevents liquid leakage. At the same time, the slider and moving block, in conjunction with the moving groove, allow the installation pipe and sealing ring to move flexibly, facilitating installation and adjustment; the fastening structure composed of the threaded pipe, screw, and positioning cover can stabilize the position of the installation pipe, ensuring a long-lasting and reliable sealing effect and improving the safety and stability of equipment operation.

[0019] (2) The leak-proof, dry-wear-resistant shielded pump features a replacement mechanism that combines a movable tube, a snap-fit ​​rod, and a compression spring to enable quick engagement and disengagement of the connecting rod and the mounting tube. When the sealing ring needs to be replaced due to wear, simply press the snap-fit ​​rod to overcome the spring force of the compression spring, and the connecting rod and sealing ring can be removed from the mounting tube. This is convenient, quick, reduces maintenance time and costs, and improves equipment maintenance efficiency. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the movable block and the outer side of the mounting tube of this utility model;

[0022] Figure 3 This is a schematic diagram of the outer side of the replacement mechanism of this utility model;

[0023] Figure 4 This is a utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0024] In the diagram: 1. Base; 2. Shielded pump body; 21. Inlet pipe; 22. Rotating shaft; 3. Sealing mechanism; 31. Connecting plate; 32. Moving groove; 33. Slider; 34. Moving block; 35. Mounting pipe; 36. Connecting rod; 37. Sealing ring; 38. L-shaped plate; 39. Threaded pipe; 310. Screw; 311. Positioning cover; 4. Replacement mechanism; 41. Movable pipe; 42. Snap-fit ​​rod; 43. Compression spring; 44. Connecting hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4A leak-proof, dry-wear resistant shielded pump includes a base 1, a shielded pump body 2 fixedly connected to the top of the base 1, an inlet pipe 21 fixedly connected to the outer side of the top of the shielded pump body 2, a rotating shaft 22 fixedly connected to the output end of the shielded pump body 2, and a sealing mechanism 3 provided on the outer side of the base 1.

[0027] The sealing mechanism 3 includes a connecting plate 31, with a moving groove 32 inside the connecting plate 31. A slider 33 is slidably engaged inside the moving groove 32. A moving block 34 is fixedly connected to the top of the slider 33. An installation tube 35 is fixedly connected to the top of the moving block 34. A connecting rod 36 is installed inside the installation tube 35. A sealing ring 37 is fixedly connected to the top of the connecting rod 36. An L-shaped plate 38 is fixedly connected to the outside of the moving block 34. A threaded tube 39 is fixedly connected to the outside of the L-shaped plate 38. A screw 310 is threadedly connected inside the threaded tube 39. A positioning cover 311 is fixedly connected to the outside of the screw 310.

[0028] Furthermore: the connecting plate 31 is fixedly connected to the bottom of the shielded pump body 2, the moving block 34 is slidably connected to the top of the connecting plate 31 through the slider 33, the sealing ring 37 is movably connected to the outside of the rotating shaft 22 through the mounting tube 35 and the connecting rod 36, and the sealing ring 37 and the rotating shaft 22 are on the same plane, the L-shaped plate 38 is symmetrically distributed on the outside of the moving block 34, and one side of the L-shaped plate 38 is located on both sides of the connecting plate 31, the positioning cover 311 is movably connected to the outside of the L-shaped plate 38 through the screw 310, and the positioning cover 311 is located between the outside of the L-shaped plate 38 and the connecting plate 31.

[0029] It should be noted that the sealing mechanism 3, as the core innovative part of this canned motor pump, is designed around the connection between the rotating shaft 22 and the pump body, aiming to create a dynamic and stable sealing environment. The connecting plate 31 is fixed below the canned motor pump body 2, providing the mounting base for the entire sealing mechanism 3. The movable groove 32 on it forms a sliding fit structure with the slider 33, allowing the movable block 34 to move flexibly in the horizontal direction. This design not only facilitates the precise positioning of the mounting pipe 35 and its auxiliary components, but also adaptively adjusts the position of the sealing ring 37 during equipment operation, ensuring that it is always in close contact with the rotating shaft 22, effectively preventing liquid leakage.

[0030] As a further improvement of this utility model, a replacement mechanism 4 is provided between the mounting tube 35 and the connecting rod 36. The replacement mechanism 4 includes a movable tube 41, a snap-fit ​​rod 42 is connected inside the movable tube 41, a compression spring 43 is fixedly connected to the snap-fit ​​rod 42, and a connection hole 44 is opened inside the connecting rod 36.

[0031] Furthermore: the movable tubes 41 are symmetrically distributed on the outside of the mounting tube 35, the snap-fit ​​rods 42 pass through the inner wall of the mounting tube 35, the number of connecting holes 44 is the same as that of the snap-fit ​​rods 42, and the connecting holes 44 are compatible with the snap-fit ​​rods 42.

[0032] Specifically: During long-term use, the sealing ring 37 is a vulnerable part, and the ease of its replacement directly affects the maintenance efficiency of the equipment. The design of the replacement mechanism 4 cleverly solves this problem. The movable tube 41 is symmetrically distributed on the outside of the mounting tube 35, and the internally set snap-fit ​​rod 42 and compression spring 43 form an elastic snap-fit ​​structure. When it is necessary to replace the sealing ring 37, simply press the snap-fit ​​rod 42 to make it retract into the movable tube 41 to overcome the elastic force of the compression spring 43, and the connecting rod 36 and the sealing ring 37 can be pulled out from the mounting tube 35 to complete the disassembly of the old parts; when installing the new sealing ring 37 and connecting rod 36, align them with the mounting tube 35 and insert them. The snap-fit ​​rod 42 automatically snaps into the connecting hole 44 under the action of the compression spring 43 to achieve quick installation and fixation.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] Working principle: In the operation of the sealing mechanism 3, when sealing is required at the rotating shaft 22, the moving block 34 slides within the moving groove 32 of the connecting plate 31 via the slider 33. This pushes the moving block 34 to bring the mounting tube 35, connecting rod 36, and sealing ring 37 closer to the rotating shaft 22. Once the sealing ring 37 has moved to the appropriate position and is in contact with the rotating shaft 22, the screw 310 is turned. The screw 310 rotates and moves within the threaded tube 39, causing the positioning cover 311 to gradually press against the L-shaped plate 38, fixing the moving block 34 onto the connecting plate 31. This ensures that the sealing ring 37 is stably fitted onto the outside of the rotating shaft 22, forming a sealing structure and effectively preventing liquid leakage from the rotating shaft 22.

[0035] In terms of the operation of the replacement mechanism 4, when the sealing ring 37 is worn and needs to be replaced, the movable tube 41 is pulled. The movable tube 41 drives the snap-fit ​​rod 42 to move outward against the elastic force of the compression spring 43, causing the snap-fit ​​rod 42 to disengage from the connecting hole 44 of the connecting rod 36. At this time, the connecting rod 36, along with the sealing ring 37, can be removed from the mounting tube 35 for replacement. After replacement, the new connecting rod 36 is inserted into the mounting tube 35. Under the action of the compression spring 43, the snap-fit ​​rod 42 automatically springs into the connecting hole 44, achieving quick snap-fit ​​and fixation of the connecting rod 36, thus conveniently and quickly completing the replacement of the sealing ring 37. Through the coordinated operation of the sealing mechanism 3 and the replacement mechanism 4, this shielded pump achieves good leak-proof and dry-wear resistance performance.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof dry-running canned pump comprising a base (1), characterized in that: The top of the base (1) is fixedly connected with a shield pump body (2), the top outer side of the shield pump body (2) is fixedly connected with a liquid inlet pipe (21), the output end of the shield pump body (2) is fixedly connected with a rotating shaft (22), and the outer side of the base (1) is provided with a sealing mechanism (3). The sealing mechanism (3) comprises an adapter plate (31), a moving groove (32) is formed in the inner side of the adapter plate (31), a sliding block (33) is slidably connected in the inner side of the moving groove (32), a moving block (34) is fixedly connected to the top of the sliding block (33), an installation pipe (35) is fixedly connected to the top of the moving block (34), a connecting rod (36) is installed in the inner side of the installation pipe (35), a sealing ring (37) is fixedly connected to the top of the connecting rod (36), an L-shaped plate (38) is fixedly connected to the outer side of the moving block (34), a threaded pipe (39) is fixedly connected to the outer side of the L-shaped plate (38), and a screw rod (310) is threadedly connected in the inner side of the threaded pipe (39).

2. A leak-proof, dry-running canned pump according to claim 1, characterized in that: A replacement mechanism (4) is arranged between the installation pipe (35) and the connecting rod (36), the replacement mechanism (4) comprises a movable pipe (41), a clamping rod (42) is connected to the inner side of the movable pipe (41), a compression spring (43) is fixedly connected to the clamping rod (42), and a connecting hole (44) is formed in the inner side of the connecting rod (36).

3. A leak-proof, dry-running canned pump according to claim 1, characterized in that: The adapter plate (31) is fixedly connected below the shield pump body (2), and the moving block (34) is slidably connected to the top of the adapter plate (31) through the sliding block (33).

4. A leak-proof, dry-running canned pump in accordance with claim 1, wherein: The sealing ring (37) is movably connected to the outer side of the rotating shaft (22) through the installation pipe (35) and the connecting rod (36), and the sealing ring (37) is in the same plane as the rotating shaft (22).

5. A leak-proof, dry-running canned pump in accordance with claim 1, wherein: The L-shaped plates (38) are symmetrically arranged on the outer side of the moving block (34), and one side of the L-shaped plate (38) is located on both sides of the adapter plate (31).

6. A leak-tight dry-running canned pump according to claim 1, characterized in that: The positioning cover (311) is movably connected to the outer side of the L-shaped plate (38) through the screw rod (310), and the positioning cover (311) is located between the outer sides of the L-shaped plate (38) and the adapter plate (31).

7. A leak-tight dry-running canned pump according to claim 2, characterized in that: The movable pipes (41) are symmetrically arranged on the outer side of the installation pipe (35), and the clamping rods (42) cross the inner wall of the installation pipe (35).

8. A leak-proof, dry-running canned pump in accordance with claim 2, wherein: The number of the connecting holes (44) is the same as that of the clamping rods (42), and the connecting holes (44) are matched with the clamping rods (42).

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