Mechanical seal pump convenient to disassemble

Abstract

The utility model discloses a mechanical seal pump convenient to disassemble, which comprises a motor, a motor body and a driving shaft, the impeller is mounted on the driving shaft; the pump body is detachably connected with the pump cover, and the impeller is wrapped in the pump body; the pump cover is detachably connected with the motor body, the pump cover is provided with an inner hole, the pump cover is arranged on the driving shaft in a sleeving mode through the inner hole, and an embedding position is arranged at the position, close to the inner hole, of the pump cover; the driving shaft is sleeved with the mechanical seal, the mechanical seal is located between the pump body and the pump cover, the mechanical seal comprises a static ring, and the static ring is installed on the embedding position; a through hole is formed in the position, abutting against the static ring, of the surface of the pump cover. An opening communicated with the through hole is formed in the outer side of the pump cover. When the pump is disassembled, the pump body, the impeller and part of accessories of the mechanical seal are disassembled firstly, then a small hook wrench extends into the opening to be pushed towards the through hole, the static ring is pushed out, the static ring cannot be damaged, and the taking-out difficulty is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumps, and in particular relates to a mechanical seal detachable pump. Background Art

[0002] For equipment such as water pumps, since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment. The medium in the equipment leaks out through the gap. If the pressure inside the equipment is lower than the atmospheric pressure, air leaks into the equipment. Therefore, there must be a shaft sealing device to prevent leakage. Since mechanical seals have the advantages of less leakage and long service life, mechanical seals are the most important shaft sealing method for these equipment.

[0003] There is an existing water pump in which the static ring in the mechanical seal is embedded in the pump cover. When disassembling, the pump cover needs to be removed first, and then the static ring is hammered and cracked by a hand nut or a small cone rod, and then the static ring is taken out, which will cause damage to the static ring; or after removing the pump cover, a hand nut or a small cone rod is used to knock through the side of the inner hole of the pump cover to take it out, which is difficult to take out. Utility Model Content

[0004] In order to overcome the above technical defects, the utility model discloses a mechanical seal detachable pump, which can solve the problems in the background technology.

[0005] The utility model is implemented according to the following technical solutions:

[0006] The utility model discloses a mechanical seal detachable pump, comprising:

[0007] A motor, comprising a motor body and a drive shaft;

[0008] an impeller mounted on the drive shaft;

[0009] A pump body and a pump cover; the pump body and the pump cover are detachably connected and the pump body covers the impeller; the pump cover is detachably connected to the motor body, the pump cover has an inner hole, the pump cover is sleeved on the drive shaft through the inner hole, and an embedding position is provided near the inner hole;

[0010] A mechanical seal, which is sleeved on the drive shaft and located between the pump body and the pump cover, and the mechanical seal includes a stationary ring, which is installed on the embedded position;

[0011] Wherein, a through hole is provided on the surface of the pump cover which contacts the static ring; and an opening which is connected to the through hole is provided on the outer side of the pump cover.

[0012] Compared with the prior art, the utility model discloses a mechanical seal detachable pump. When disassembling the pump, the pump body, impeller and some mechanical seal accessories are first removed. Since a through hole is provided on the surface of the pump cover that conflicts with the static ring; the outer side of the pump cover has an opening connected to the through hole, so that the staff can reach into the opening, and then use a hexagonal wrench or a small hook wrench to push the through hole to push the static ring out of the embedded position, which will not cause damage to the static ring. After maintenance, it can be used again, and the removal difficulty is low, which effectively improves the maintenance efficiency of the water pump and the utilization rate of accessories.

[0013] In a preferred embodiment, the inner hole and the drive shaft are clearance-matched.

[0014] In a preferred embodiment, the diameter of the inner hole is 3 to 6 mm larger than the diameter of the drive shaft matched with the inner hole.

[0015] In a preferred embodiment, there are a plurality of through holes.

[0016] In a preferred embodiment, the through hole comprises a groove and / or a round through hole.

[0017] In a preferred embodiment, the pump cover includes a first flange and a second flange parallel to the first flange, a hollow annular column is connected between the first flange and the second flange, and the opening is arranged on the annular column.

[0018] In a preferred embodiment, the drive shaft is a stepped shaft, comprising a first shaft and a second shaft, the first shaft and the second shaft being transitionally connected via a first shaft shoulder; the impeller is mounted on the first shaft, the inner hole of the pump cover is sleeved with the second shaft; the mechanical seal is sleeved with the second shaft; a mechanical seal sleeve is provided between the impeller and the mechanical seal, the mechanical seal sleeve is sleeved with the first shaft, and abuts against the surface of the first shaft shoulder and the surface of the mechanical seal facing the impeller.

[0019] In a preferred embodiment, a keyway is provided on the first shaft; the mechanical seal detachable pump also includes a key; the surface of the impeller sleeved with the first shaft has a groove; the key is installed on the keyway and is connected with the groove.

[0020] In a preferred embodiment, the mechanical seal detachable pump also includes an impeller nut and a stop washer; the drive shaft also includes a threaded connection section, the threaded connection section is transitionally connected to the first shaft via a second shaft shoulder and the front end of the first shaft, the stop washer is sleeved on the threaded connection section and abuts against the second shaft shoulder, the impeller nut is threadedly connected to the threaded connection section and abuts against the stop washer to fasten the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the mechanical seal detachable pump of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the connection between the drive shaft and the mechanical seal, the mechanical seal sleeve, the stop washer and the impeller nut of the utility model;

[0024] Figure 3 This is one of the structural schematic diagrams of the pump cover of the utility model;

[0025] Figure 4 This is the second structural schematic diagram of the pump cover of the utility model.

[0026] Marking Description:

[0027] 11 motor body, 12 driving shaft, 121 first shaft, 122 second shaft, 123 threaded connection section, 2 impeller, 31 pump body, 32 pump cover, 321 inner hole, 322 through hole, 323 opening, 324 first flange, 325 second flange, 41 static ring, 42 dynamic ring, 43 spring seat, 44 spring, 5 key, 6 impeller nut, 7 retaining washer, 8 machine seal sleeve. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0030] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0031] like Figures 1 to 4 As shown, the utility model discloses a mechanical seal detachable pump, comprising:

[0032] The motor comprises a motor body 11 and a drive shaft 12;

[0033] An impeller 2 mounted on the drive shaft 12;

[0034] A pump body 31 and a pump cover 32; the pump body 31 and the pump cover 32 are detachably connected and the pump body 31 covers the impeller 2; the pump cover 32 is detachably connected to the motor body 11, the pump cover 32 has an inner hole 321, the pump cover 32 is sleeved on the drive shaft 12 through the inner hole 321, and an embedding position is provided near the inner hole 321;

[0035] The mechanical seal 4 is sleeved on the drive shaft 12 and located between the pump body 31 and the pump cover 32. The mechanical seal 4 includes a stationary ring 41, which is installed on the embedded position; wherein,

[0036] A through hole 322 is provided on the surface of the pump cover 32 that contacts the stationary ring 41 ; an opening 323 communicating with the through hole 322 is provided on the outer side of the pump cover 32 .

[0037] Compared with the prior art, the utility model discloses a mechanical seal detachable pump. When disassembling the pump, the pump body 31, the impeller 2 and some accessories of the mechanical seal 4 are first disassembled. Since a through hole 322 is provided on the surface of the pump cover 32 that conflicts with the static ring 41; the outer side of the pump cover 32 has an opening 323 connected to the through hole 322, so that the staff can reach into the opening 323, and then use a hexagonal wrench or a small hook wrench to push the through hole 322 to push the static ring 41 out of the embedded position, which will not cause damage to the static ring 41. It can be used again after maintenance and has low difficulty in taking out, which effectively improves the maintenance efficiency of the water pump and the utilization rate of accessories.

[0038] In one embodiment, the inner hole 321 and the drive shaft 12 are clearance-matched to facilitate installation.

[0039] Preferably, the diameter of the inner hole 321 is 3-6 mm larger than the diameter of the drive shaft 12 matched with the inner hole 321 to facilitate installation.

[0040] In one embodiment, there are multiple through holes 322 to facilitate the staff to insert tools into multiple through holes 322 to act on different positions of the stationary ring 41 and gradually push the stationary ring 41 out. Preferably, the through hole 322 includes a groove and / or a round through hole 322.

[0041] In one embodiment, the pump cover 32 includes a first flange 324 and a second flange 325 parallel to the first flange 324. A hollow annular column is connected between the first flange 324 and the second flange 325, and the opening 323 is provided on the annular column. The first flange 324 is detachably connected to the pump body 31, and the second flange 325 is detachably connected to the motor body 11; the opening 323 is provided at the annular column for a worker to insert a tool.

[0042] In one embodiment, the drive shaft 12 is a stepped shaft, including a first shaft 121 and a second shaft 122, and the first shaft 121 and the second shaft 122 are transitionally connected via a first shaft shoulder; the impeller 2 is installed on the first shaft 121, and the inner hole 321 of the pump cover 32 is sleeved with the second shaft 122; the mechanical seal 4 is sleeved with the second shaft 122; a mechanical seal sleeve 8 is provided between the impeller 2 and the mechanical seal 4, and the mechanical seal sleeve 8 is sleeved with the first shaft 121, and abuts against the surface of the first shaft shoulder and the surface of the mechanical seal 4 facing the impeller 2, and the mechanical seal 4 is blocked by the mechanical seal sleeve 8 to limit the position of the mechanical seal 4.

[0043] Furthermore, a keyway is provided on the first shaft 121; the mechanical seal detachable pump also includes a key 5; the surface of the impeller 2 and the first shaft 121 are sleeved with a groove; the key 5 is installed on the keyway and is matched with the groove to limit the impeller 2 so that the impeller 2 rotates together with the drive shaft 12.

[0044] Furthermore, the mechanical seal detachable pump also includes an impeller nut 6 and a stop washer 7; the drive shaft 12 also includes a threaded connection section 123, the threaded connection section 123 is transitionally connected to the first shaft 121 via a second shaft shoulder and at the front end of the first shaft 121, the stop washer 7 is sleeved on the threaded connection section 123 and abuts against the second shaft shoulder, the impeller nut 6 is threadedly connected to the threaded connection section 123 and abuts against the stop washer 7 to fasten the impeller 2.

[0045] The mechanical seal 4 further includes a dynamic ring 42 , a spring seat 43 and a spring 44 . The spring 44 is mounted on the spring seat 43 . One end of the spring seat 43 abuts against the mechanical seal sleeve 8 , and the other end is mounted with the dynamic ring 42 . The dynamic ring 42 abuts against the static ring 41 .

[0046] When disassembling, first disassemble the pump body 31 to expose the impeller 2, then loosen the impeller nut 6 and the retaining washer 7, disassemble the impeller 2, key 5, and mechanical seal sleeve 8 in turn, gently pull out the dynamic ring 42 from the drive shaft 12 by hand, and finally use a tool to push out the static ring 41 at the opening 323 of the pump cover. The whole process is easy and convenient.

[0047] During assembly, first press the stationary ring 41 into the embedded position, then install the dynamic ring 42, then install the machine seal sleeve 8, key 5, impeller 2, install the retaining washer 7 and impeller nut 6 and lock them, and finally install the pump body 31.

[0048] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A mechanical seal detachable pump, Features: A motor, comprising a motor body and a drive shaft; an impeller mounted on the drive shaft; A pump body and a pump cover; the pump body and the pump cover are detachably connected and the pump body covers the impeller; the pump cover is detachably connected to the motor body, the pump cover has an inner hole, the pump cover is sleeved on the drive shaft through the inner hole, and an embedding position is provided near the inner hole; A mechanical seal, which is sleeved on the drive shaft and located between the pump body and the pump cover, and the mechanical seal includes a stationary ring, which is installed on the embedded position; Wherein, a through hole is provided on the surface of the pump cover which contacts the static ring; and an opening which is connected to the through hole is provided on the outer side of the pump cover.

2. The mechanical seal detachable pump according to claim 1, Features: The inner hole is clearance-matched with the drive shaft.

3. The mechanical seal detachable pump according to claim 2, Features: The diameter of the inner hole is 3 to 6 mm larger than the shaft diameter of the driving shaft matched with the inner hole.

4. The mechanical seal detachable pump according to claim 1, Features: There are a plurality of through holes.

5. The mechanical seal detachable pump according to claim 1 or 4, Features: The through hole includes a groove and / or a round through hole.

6. The mechanical seal detachable pump according to claim 1, Features: The pump cover comprises a first flange and a second flange parallel to the first flange, a hollow annular column is connected between the first flange and the second flange, and the opening is arranged on the annular column.

7. The mechanical seal detachable pump according to claim 1, Features: The driving shaft is a stepped shaft, comprising a first shaft and a second shaft, wherein the first shaft and the second shaft are transitionally connected via a first shaft shoulder; The impeller is mounted on the first shaft, the inner hole of the pump cover is sleeved with the second shaft; the mechanical seal is sleeved with the second shaft; a mechanical seal sleeve is provided between the impeller and the mechanical seal, the mechanical seal sleeve is sleeved with the first shaft, and abuts against the first shaft shoulder surface and the surface of the mechanical seal facing the impeller.

8. The mechanical seal detachable pump according to claim 7, Features: The first shaft is provided with a keyway; the mechanical seal detachable pump also includes a key; the surface of the impeller sleeved with the first shaft has a groove; the key is installed on the keyway and is matched with the groove.

9. The mechanical seal detachable pump according to claim 7 or 8, Features: The mechanical seal detachable pump also includes an impeller nut and a stop washer; The drive shaft also includes a threaded connection section, which is transitionally connected to the first shaft and the front end of the first shaft via a second shoulder. The stop washer is sleeved on the threaded connection section and abuts against the second shoulder. The impeller nut is threadedly connected to the threaded connection section and abuts against the stop washer to fasten the impeller.

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