Quick-release mechanical seal structure for pump

Abstract

The utility model provides a kind of quick-release mechanical seal structure for pump, belong to mechanical basic component technical field, comprising: pump shell, floating end cover, guide sleeve, sealing pad, water seal cover, shaft sleeve, locating ring, spring, moving ring and gland, the side outer end of pump shell is equipped with floating end cover, the utility model is pre-assembled in floating end cover by locating ring, spring, moving ring and gland and transmission / anti-rotation mechanism, only need to be fixed gland and water seal cover by whole and be installed in the sealing cavity of floating end cover, without each accurate part alignment installation, gland is embedded in installation groove and is screw connection between gland, the other end of gland is embedded in placement groove and extends to the outer end of moving ring outward, not only can guarantee the sealing between shaft sleeve, moving ring and gland, and gland can be quickly disassembled with moving ring, only by disassembling water seal cover can complete the replacement or inspection of sealing, significantly reduce downtime, reduce maintenance cost and labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of mechanical basic components technology, and in particular to a quick-release mechanical seal structure for pumps. Background Technology

[0002] Mechanical seals for pumps are key components that prevent leakage of the medium inside the pump along the pump shaft. They are devices installed and operated in pump equipment to provide dynamic sealing and prevent the fluid medium in the pump casing from flowing out of the pump through the pump shaft. In industries such as petrochemicals, pharmaceuticals, food processing, and water treatment, centrifugal pumps are core equipment for fluid transportation. Mechanical seals, as key components preventing leakage of the pump medium along the shaft, directly impact production safety and environmental compliance. However, traditional mechanical seals have significant drawbacks in maintenance and replacement: The pump body, impeller, or coupling needs to be dismantled, which takes several hours or even longer, resulting in huge losses due to production line shutdowns. The sealing assembly consists of dozens of individual parts (springs, O-rings, rotating / stationary rings). When reassembling the rotating / stationary rings on site, the spring compression and end face parallelism need to be precisely adjusted. When replacing them, the pump shaft still needs to be disassembled, making "in-situ quick disassembly" impossible. Therefore, this application provides a quick-release mechanical seal structure for pumps to meet the requirements. Utility Model Content

[0003] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology and to propose a quick-release mechanical seal structure for pumps.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A quick-release mechanical seal structure for a pump includes: a pump casing, a floating end cover, a guide sleeve, a sealing gasket, a water seal cover, a shaft sleeve, a positioning ring, a spring, a rotating ring, and a pressure cap. A floating end cover is installed at one outer end of the pump casing. A guide sleeve is installed inside the floating end cover. A sealing gasket is installed at the other end of the guide sleeve inside the floating end cover. A water seal cover is installed at the end opening of the floating end cover. A shaft sleeve is embedded inside the pump casing. A positioning ring, a spring, a rotating ring, and a pressure cap are sequentially installed at the outer end of the shaft sleeve. The rotating ring has an integrally formed placement groove inside, and an installation groove is also provided on the side of the placement groove inside the rotating ring.

[0005] Preferably, the bushing extends sequentially through the pump casing, the floating end cover, and the water seal cover to the outer end of the water seal cover.

[0006] Preferably, the sealing gasket is embedded in the opening where the floating end cover meets the pump casing, and the diameter of the opening gradually decreases to a cone shape.

[0007] Preferably, the cavity of the sealing gasket is conical.

[0008] Preferably, the positioning ring is arranged in two segments, with one end of the positioning ring being cylindrical and the other end being conical.

[0009] Preferably, the positioning ring is made of high molecular weight polyphenylene sulfide.

[0010] Preferably, the diameter of the spring is smaller than the diameter of the positioning ring and the moving ring, and the two ends of the spring abut against the sealing rings of the positioning ring and the moving ring, respectively.

[0011] Preferably, the diameter of the moving ring is larger than the diameter of the positioning ring, and the moving ring abuts against the housing of the water seal cover.

[0012] Preferably, the gland is convex in shape, the diameter of the gland is smaller than the diameter of the moving ring, and the outer end of the gland abuts against the housing of the water seal cover.

[0013] Preferably, one side of the gland is provided with a threaded groove, the gland is embedded in the mounting groove and is threadedly connected to the gland, and the other end of the gland is embedded in the placement groove and extends outward to the outer end of the moving ring.

[0014] Compared with the prior art, this utility model has at least the following beneficial effects:

[0015] In the above solution, by pre-assembling the positioning ring, spring, rotating ring, pressure cap, and transmission / anti-rotation mechanism inside the floating end cover, it is only necessary to install the entire assembly into the sealing cavity of the floating end cover and fix the pressure cap and water seal cover. There is no need to align and install each precision part individually. The pressure cap is embedded in the mounting groove and is threadedly connected to the pressure cap. The other end of the pressure cap is embedded in the placement groove and extends outward to the outer end of the rotating ring. This not only ensures the sealing between the bushing, rotating ring, and pressure cap, but also allows the pressure cap to be quickly disassembled and assembled with the rotating ring. The seal can be replaced or inspected simply by removing the water seal cover, which significantly reduces downtime, maintenance costs, and labor intensity.

[0016] In the above solution, the tapered embedded structure is adopted, which greatly reduces the friction between the positioning ring and the sealing gasket. This not only increases the service life of the positioning ring, but also makes it difficult for the sealing gap to expand, ensuring the sealing performance of the structure. During the cooperation with the sealing gasket, the positioning ring made of high-molecular polyphenylene sulfide material has good toughness and will not break due to deformation. The positioning ring will only wear down gradually with use, unlike conventional stainless steel materials which will deform or even break. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the specific connection structure of the bushing of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the moving ring and the pressure cap of this utility model; Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A.

[0019] [Figure Labels] 1-Pump casing; 2-Floating end cover; 3-Guide sleeve; 4-Sealing gasket; 5-Water seal cover; 6-Shaft sleeve; 7-Positioning ring; 8-Spring; 9-Dynamic ring; 10-Pressure cover; 901-Placement groove; 902-Mounting groove.

[0020] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0021] 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.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4The quick-release mechanical seal structure for a pump shown in this utility model embodiment includes: a pump housing 1, a floating end cover 2, a guide sleeve 3, a sealing gasket 4, a water seal cover 5, a shaft sleeve 6, a positioning ring 7, a spring 8, a moving ring 9, and a pressure cover 10. The floating end cover 2 is installed at one outer end of the pump housing 1, the guide sleeve 3 is installed on the inner side of the floating end cover 2, the sealing gasket 4 is installed on the inner side of the floating end cover 2 at the other end of the guide sleeve 3, and the water seal cover 5 is installed at the end opening of the floating end cover 2. The shaft sleeve 6 is embedded inside the pump housing 1, and the positioning ring 7, spring 8, moving ring 9, and pressure cover 10 are sequentially installed on the outer end of the shaft sleeve 6. The moving ring 9 has an integrally formed placement groove 901 inside, and an installation groove 902 is also provided on the side of the placement groove 901 inside the moving ring 9.

[0024] In this embodiment, the bushing 6 passes through the pump casing 1, the floating end cover 2 and the water seal cover 5 in sequence and extends to the outer end of the water seal cover 5.

[0025] In this embodiment, the sealing gasket 4 is embedded in the opening where the floating end cover 2 and the pump housing 1 meet, and the diameter of the opening gradually decreases to a cone shape.

[0026] In this embodiment, the cavity of the sealing gasket 4 is cone-shaped.

[0027] In this embodiment, the positioning ring 7 is arranged in two sections. One end of the positioning ring 7 is cylindrical and the other end is conical. The conical end of the positioning ring 7 is embedded in the cavity of the sealing gasket 4. This structure adopts a tapered embedded structure, which greatly reduces the friction between the positioning ring 7 and the sealing gasket 4. This not only increases the service life of the positioning ring 7, but also makes it difficult for the sealing gap to expand, ensuring the sealing performance of the structure. During the cooperation with the sealing gasket 4, the positioning ring 7 will only wear down gradually, and will not deform or even break like conventional stainless steel materials.

[0028] In this embodiment, the positioning ring 7 is made of high molecular weight polyphenylene sulfide. The positioning ring 7 made of high molecular weight polyphenylene sulfide has good toughness and will not break due to deformation.

[0029] In this embodiment, the diameter of the spring 8 is smaller than the diameter of the positioning ring 7 and the moving ring 9, and the two ends of the spring 8 abut against the sealing rings of the positioning ring 7 and the moving ring 9 respectively. The moving ring 9 can move along the bushing 6 with the positioning ring 7 as the fulcrum through the spring 8.

[0030] In this embodiment, the diameter of the moving ring 9 is larger than the diameter of the positioning ring 7, and the moving ring 9 abuts against the housing of the water seal cover 5, so that the other end of the moving ring 9 abuts against the housing of the water seal cover 5, serving as a fulcrum for the other end.

[0031] In this embodiment, the pressure cap 10 is convex in shape, and the diameter of the pressure cap 10 is smaller than the diameter of the moving ring 9. The outer end of the pressure cap 10 abuts against the housing of the water seal cover 5. The pressure cap 10 is set in a two-section manner, which facilitates disassembly and assembly at the outer end of the moving ring 9. On-site, it is only necessary to install the entire structure into the sealing cavity and fix the pressure cap, without the need for each precision part to be aligned and installed individually.

[0032] In this embodiment, a threaded groove is provided on one outer end of the pressure cover 10. The pressure cover 10 is embedded in the mounting groove 902 and is threadedly connected to the pressure cover 10. The other end of the pressure cover 10 is embedded in the placement groove 901 and extends outward to the outer end of the moving ring 9. This not only ensures the sealing between the bushing 6, the moving ring 9 and the pressure cover 10, but also allows the pressure cover 10 to be quickly disassembled and assembled with the moving ring 9. The seal can be replaced or inspected simply by disassembling the water seal cover 5, which significantly reduces downtime, maintenance costs and labor intensity.

[0033] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A quick-release mechanical seal structure for a pump, characterized in that, include: The pump housing (1), floating end cover (2), guide sleeve (3), sealing gasket (4), water seal cover (5), bushing (6), positioning ring (7), spring (8), moving ring (9) and pressure cover (10) are provided. A floating end cover (2) is installed at one outer end of the pump housing (1). A guide sleeve (3) is installed on the inner side of the floating end cover (2). A sealing gasket (4) is installed on the inner side of the floating end cover (2) at the other end of the guide sleeve (3). A water seal cover (5) is installed at the end opening of the floating end cover (2). A bushing (6) is embedded in the inside of the pump housing (1). A positioning ring (7), spring (8), moving ring (9) and pressure cover (10) are installed sequentially on the outer end of the bushing (6). An integral placement groove (901) is formed inside the moving ring (9). An installation groove (902) is also provided on the side of the placement groove (901) inside the moving ring (9).

2. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The bushing (6) extends through the pump casing (1), the floating end cover (2) and the water seal cover (5) in sequence to the outer end of the water seal cover (5).

3. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The sealing gasket (4) is embedded in the opening where the floating end cover (2) meets the pump housing (1), and the diameter of the opening gradually decreases to a cone shape.

4. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The cavity of the sealing gasket (4) is cone-shaped.

5. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The positioning ring (7) is arranged in two sections. One end of the positioning ring (7) is cylindrical and the other end is conical.

6. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The positioning ring (7) is made of high molecular weight polyphenylene sulfide.

7. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The diameter of the spring (8) is smaller than the diameter of the positioning ring (7) and the moving ring (9), and the two ends of the spring (8) abut against the sealing rings of the positioning ring (7) and the moving ring (9), respectively.

8. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The diameter of the moving ring (9) is greater than the diameter of the positioning ring (7), and the moving ring (9) abuts against the housing of the water seal cover (5).

9. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The pressure cap (10) is convex in shape, and the diameter of the pressure cap (10) is smaller than the diameter of the moving ring (9). The outer end of the pressure cap (10) abuts against the shell of the water seal cover (5).

10. The quick-release mechanical seal structure for pumps according to claim 1, characterized in that: The outer end of one side of the pressure cap (10) is provided with a threaded groove. The pressure cap (10) is embedded in the mounting groove (902) and is threadedly connected to the pressure cap (10). The other end of the pressure cap (10) is embedded in the placement groove (901) and extends outward to the outer end of the moving ring (9).

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