Quick mechanical seal replacement structure of pump base

Abstract

The utility model provides a quick mechanical seal replacement structure of a pump base, and belongs to the technical field of water pump accessories. The problems that in the prior art, a sealing shell can only be matched with one mechanical seal, and the mechanical seal is not easy to disassemble are solved. The sealing device comprises a sealing shell, a mechanical sealing device and a sealing seat, the whole sealing shell is of a cylinder structure, a sealing face is formed at the position, close to the bottom end, of the sealing shell, a mechanical sealing groove is formed in the sealing face, the mechanical sealing device is installed in the mechanical sealing groove, a sealing groove is formed in the sealing face on the outer side of the mechanical sealing groove, and a plurality of lower connecting holes are formed in the sealing groove. The sealing seat is T-shaped, an upper connecting hole is formed in the sealing seat, the upper connecting hole is communicated with the lower connecting hole, the lower end of the sealing seat extends into the mechanical sealing groove and is connected with the top end of the mechanical sealing device, the sealing shell below the sealing surface extends to form a protective ring body, a plurality of convex columns are formed at the bottom of the sealing surface, and a side window is formed in the outer side face of the sealing shell. A pump shaft hole is formed in the top end face of the sealing shell. The mechanical seal device has the advantages of being capable of being matched with various mechanical seals and convenient to disassemble.

Description

Technical Field

[0001] This utility model belongs to the technical field of water pump accessories, and relates to a quick-change structure for the mechanical seal of a pump base. Background Technology

[0002] The main function of a water pump is to transport liquids. Mechanical seals can effectively prevent the transported medium from leaking out from the gap between the pump's rotating shaft and the pump body. Existing water pump seal housings on the market can usually only be used with one type of mechanical seal and are not easy to disassemble and replace.

[0003] Chinese patent publication number CN206299604U discloses a water pump mechanical seal cavity and a water pump, including a pump cover, a central through hole on the pump cover, and a mechanical seal cavity connected to the central through hole on the side of the central through hole facing the impeller. The mechanical seal cavity has a conical cavity structure, with a first end of the mechanical seal cavity near the impeller and a second end of the mechanical seal cavity opposite to the first end along its axial direction. The diameter of the first end of the mechanical seal cavity is larger than the diameter of the second end of the mechanical seal cavity. The second end of the mechanical seal cavity is sealed by a mechanical seal device, which includes a dynamic ring, a stationary ring, and auxiliary sealing elements. The first end of the mechanical seal cavity has a first positioning step for connecting the impeller, and the second end of the mechanical seal cavity has a second positioning step for connecting the stationary ring of the mechanical seal device. The first positioning step and the second positioning step are connected by a conical inner ring surface. An expansion surface for expanding the internal space of the mechanical seal cavity is provided between the conical inner ring surface and the second positioning step.

[0004] The patent provides a water pump mechanical seal cavity and water pump, in which the water pump mechanical seal is formed between the pump cover and the impeller. The mechanical seal is located inside the water pump mechanical seal cavity, and the pump cover is fixed by several set screws. The mechanical seal is difficult to disassemble and replace. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a quick-change structure for the mechanical seal of a pump base.

[0006] The objective of this utility model can be achieved through the following technical solution: A quick-change mechanical seal structure for a pump base, comprising a sealing shell, a mechanical seal device, and a sealing seat. The sealing shell is cylindrical in shape, and a sealing surface is formed near the bottom of the sealing shell. A mechanical seal groove is formed in the sealing surface, and the mechanical seal device is installed in the mechanical seal groove. A sealing groove is formed on the sealing surface outside the mechanical seal groove, and several lower connecting holes are formed in the sealing groove. The sealing seat is T-shaped and has an upper connecting hole. The upper connecting hole and the lower connecting hole are connected. The lower end of the sealing seat extends into the mechanical seal groove and connects to the top of the mechanical seal device. A protective ring is formed by extending the sealing shell below the sealing surface. Several protrusions are formed at the bottom of the sealing surface. A side window is formed on the outer surface of the sealing shell, and the number of side windows is two and they are symmetrically arranged. A pump shaft hole is formed on the top surface of the sealing shell.

[0007] In the above-mentioned quick-change structure for the mechanical seal of a pump base, the sealing surface extends out of the outer side of the sealing housing, and several bolt holes are provided on the outer periphery of the sealing surface.

[0008] In the above-mentioned quick-change structure for the mechanical seal of a pump base, the mechanical seal device is located inside the protective ring, and the protective ring has an inward-facing structure.

[0009] In the above-mentioned quick-change structure for the mechanical seal of a pump base, a reinforcing rib is formed on the outer side of the sealing housing, and the reinforcing rib is respectively attached to the outer side of the sealing housing and the upper end of the sealing surface.

[0010] In the above-mentioned quick-change structure for the mechanical seal of a pump base, a buffer groove is provided between the mechanical seal groove and the sealing groove.

[0011] Compared with the prior art, the quick-change structure for the mechanical seal of the pump base provided by this utility model has the following advantages: 1. By setting the mechanical seal groove, sealing groove and sealing seat, the sealing shell of this utility model can be adapted to the assembly of various mechanical seal devices without the need to use different sealing shell molds, thus reducing costs; 2. By setting the side opening window structure on the side end face of the sealing shell, the mechanical seal device is easy to disassemble. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the explosive structure of this utility model from another angle;

[0015] Figure 4 This is a schematic diagram of the overall structure of the second embodiment.

[0016] In the diagram: 1. Sealing shell; 11. Sealing surface; 111. Bolt hole; 12. Mechanical seal groove; 13. Sealing groove; 14. Lower connection hole; 15. Protective ring; 16. Protruding post; 17. Side window; 18. Pump shaft hole; 19. Reinforcing rib; 10. Buffer groove; 2. Mechanical seal device; 3. Sealing seat; 31. Upper connection hole. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] First embodiment:

[0019] like Figures 1 to 3 As shown, this embodiment includes a sealing shell 1, a mechanical seal device 2, and a sealing seat 3. The sealing shell 1 is cylindrical in shape. A sealing surface 11 is formed near the bottom of the sealing shell 1. A through mechanical seal groove 12 is formed at the center of the sealing surface 11. The mechanical seal device 2 is installed in the mechanical seal groove 12. A sealing groove 13 is formed on the sealing surface 11 outside the mechanical seal groove 12. The horizontal height of the sealing groove 13 is higher than the horizontal height of the mechanical seal groove 12, and the radius of the sealing groove 13 is larger than the radius of the mechanical seal groove 12. A sealing groove 13 is formed in the sealing groove 13. The sealing seat 3 is T-shaped and has an upper connecting hole 31. The large circular surface of the sealing seat 3 fits into the sealing groove 13. The upper connecting hole 31 and the lower connecting hole 14 are connected. The sealing seat 3 is fixed to the sealing groove 13 by bolts. The lower end of the sealing seat 3 extends into the mechanical seal groove 12. The inner side of the lower end of the sealing seat 3 is threaded. The lower end of the sealing seat 3 is sleeved on the outside of the mechanical seal device 2 and connected to the top of the mechanical seal device 2 by threads.

[0020] like Figures 1 to 3 As shown, the sealing shell 1 below the sealing surface 11 extends to form a protective ring 15. The protective ring 15 has an inward structure. Several protrusions 16 are formed at the bottom of the sealing surface 11. The mechanical seal device 2 is located inside the protective ring 15 and at the center of the protrusions 16. During operation, mechanical stress will appear inside the water pump. The protrusions 16 can disperse the mechanical stress at the mechanical seal device 2, which can protect the mechanical seal device 2 and extend its service life. The height of the mechanical seal device 2 is lower than that of the protective ring 15, that is, the mechanical seal device 2 does not extend out of the protective ring 15, which further extends the service life of the mechanical seal device 2. A side window 17 is provided on the outer side of the sealing shell 1. There are two side windows 17, which are symmetrically arranged. The mechanical seal device 2 can be easily disassembled and installed through the side windows 17. A pump shaft hole 18 is provided on the top surface of the sealing shell 1.

[0021] To elaborate further, such as Figures 1 to 3 As shown, the sealing surface 11 extends out of the outer side of the sealing housing 1. A reinforcing rib 19 is formed between the outer side of the sealing housing 1 and the upper outer side of the sealing surface 11. The reinforcing rib 19 enhances the structural strength of the sealing housing 1. Several bolt holes 111 are provided on the outer periphery of the sealing surface 11. The bolt holes 111 enable the sealing housing 1 to be connected to the internal connecting parts of the water pump.

[0022] To elaborate further, such as Figure 2 As shown, a buffer groove 10 is formed between the mechanical seal groove 12 and the sealing groove 13. When the sealing seat 3 is connected to the sealing groove 13, the buffer groove 10 plays a role in reducing pressure and buffering the sealing seat 3.

[0023] Second embodiment:

[0024] like Figure 4 As shown, based on the first embodiment, the mechanical seal device 2 is a modular mechanical seal device. The mechanical seal device 2 is also installed in the mechanical seal groove 12 and is sealed to the mechanical seal groove 12. The sealing seat 3 is an annular structure and is also connected to the sealing groove 13. The mechanical seal device 2 extends out of the upper end of the sealing seat 3 and is fixedly connected to the sealing seat 3.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0026] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A quick-change structure for the mechanical seal of a pump base, comprising a sealing housing (1), a mechanical seal device (2), and a sealing seat (3), characterized in that: The sealing shell (1) is cylindrical in shape. A sealing surface (11) is formed near the bottom of the sealing shell (1). An organic sealing groove (12) is formed in the sealing surface (11). The mechanical sealing device (2) is installed in the mechanical sealing groove (12). A sealing groove (13) is formed on the sealing surface (11) outside the mechanical sealing groove (12). Several lower connecting holes (14) are formed in the sealing groove (13). The sealing seat (3) is T-shaped and has an upper connecting hole (31). The hole (31) and the lower connecting hole (14) are connected. The lower end of the sealing seat (3) extends into the mechanical seal groove (12) and is connected to the top of the mechanical seal device (2). The sealing shell (1) below the sealing surface (11) extends to form a protective ring (15). Several protrusions (16) are formed at the bottom of the sealing surface (11). A side window (17) is opened on the outer side of the sealing shell (1). There are two side windows (17) and they are symmetrically arranged. A pump shaft hole (18) is opened on the top surface of the sealing shell (1).

2. The quick-change structure for the mechanical seal of a pump base according to claim 1, characterized in that: The sealing surface (11) extends out of the outer side of the sealing shell (1), and a plurality of bolt holes (111) are provided on the outer periphery of the sealing surface (11).

3. The quick-change structure for the mechanical seal of a pump base according to claim 1, characterized in that: The mechanical sealing device (2) is located inside the protective ring (15), which has an inward-facing structure.

4. The quick-change structure for the mechanical seal of a pump base according to claim 1, characterized in that: A reinforcing rib (19) is formed on the outer side of the sealing shell (1), and the reinforcing rib (19) is respectively attached to the outer side of the sealing shell (1) and the upper end of the sealing surface (11).

5. The quick-change structure for the mechanical seal of a pump base according to claim 1, characterized in that: A buffer groove (10) is provided between the mechanical seal groove (12) and the sealing groove (13).

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