Mechanical sealing device of centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and discloses a mechanical sealing device of a centrifugal pump, which comprises a pump composition mechanism, a pump body, a base fixed at the bottom of the pump body, a mounting head mounted at one end of the pump body, a connecting piece mounted at one end of the mounting head, and a central shaft mounted at the center in the mounting head, the sealing assembly is mounted outside the central shaft; and the connecting mechanism comprises a connecting piece mounted at one end of the pump body and a mounting groove formed in the connecting piece. According to the utility model, through the arrangement of the sealing assembly, a connection gap is easy to appear at the connection part of the part and the central shaft, the connection part of the part and the central shaft is sealed through the sealing ring, the sealing ring and the central shaft are fixed through the fixing ring, and meanwhile, for the connection gap of the part, the sealing effect is good. And the gaps are extruded through the connecting buckles and the abutting buckles, so that the gaps at the connecting positions are reduced, and the parts are reinforced from the interior.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically a mechanical seal device for a centrifugal pump. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. It mainly consists of an impeller, pump body, pump shaft, bearings, sealing rings, and stuffing box. Centrifugal pumps are widely used in industries such as power, metallurgy, coal, and building materials to transport slurries containing solid particles.

[0003] A mechanical seal device for a centrifugal pump, with application number 201920439000.X, includes a pump cover seat and a pump shaft. A rotating ring seat is mounted on one surface of the pump cover seat. A rotating ring is disposed inside the rotating ring seat. An elastic ring is fitted around the outer periphery of the rotating ring seat. Multiple inner guide grooves are evenly distributed along the annular direction on the rotating ring seat, and a guide post is slidably mounted in each inner guide groove. One end of the guide post abuts against the outer peripheral side of the elastic ring. A first spring is fitted on the guide post. One end of the first spring is connected to one surface of the inner guide groove. A stationary ring seat is mounted on one side of the rotating ring seat. A stationary ring is disposed inside the stationary ring seat. The stationary ring is movably mounted on the pump shaft. A positioning ring is disposed between the stationary ring and the rotating ring. The positioning ring is disposed inside the rotating ring seat. This utility model not only has a simple and reasonable structural design and is easy to install, but also has good mechanical sealing performance, strong practicality, and high market application value.

[0004] In the process of liquid transportation, the seals of the connecting parts of existing centrifugal pumps are prone to loosening due to prolonged use. Loose seals will affect the sealing performance of the device when transporting liquid, resulting in liquid leakage. Furthermore, due to the overall structure of the device, maintenance is difficult and it is hard to reinforce the connections. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technology has the problem of loose seals, which leads to liquid leakage.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A mechanical seal device for a centrifugal pump, comprising:

[0009] The pump assembly includes a pump body, a base fixed to the bottom of the pump body, a mounting head mounted on one end of the pump body, a central shaft mounted at the center of the mounting head, and a sealing assembly mounted on the outside of the central shaft.

[0010] The connecting mechanism includes a connecting piece installed at one end of the pump body, a mounting groove disposed in the connecting piece, a sealing gasket disposed in the mounting groove, connecting heads installed at both ends of the mounting head, a reinforcing component disposed outside the connecting piece, and a connecting component disposed between the connecting heads.

[0011] As a further embodiment of this utility model: the sealing assembly includes a sealing ring sleeved on the outside of the central shaft, a fixing ring sleeved on the center of the outside of the sealing ring, connecting buckles evenly distributed on the side away from the center of the inner cavity of the mounting head, a pressure buckle slidably connected in the connecting buckle, and an adjusting bolt rotatably connected to one end of the pressure buckle.

[0012] As a further improvement of this utility model: the sealing ring is made of rubber, and the fixing rings are connected to each other by screws.

[0013] As a further embodiment of this utility model: the reinforcing component includes a reinforcing ring sleeved on the outside of the connecting piece, a rack groove equally spaced inside one end of the reinforcing ring, an L-shaped connecting frame slidably connected inside the rack groove, and a positioning tooth fixed to the L-shaped connecting frame on the side near the center of the reinforcing ring.

[0014] As a further embodiment of this utility model: the inner surface of the reinforcing ring is in contact with the outer surface of the connecting piece, and the connecting pieces are connected by an L-shaped connecting frame and the reinforcing ring to form a movable connection structure.

[0015] As a further embodiment of this utility model: the mounting head and the pump body are connected by a connector, and the mounting head and the connector are connected by a connector head.

[0016] As a further embodiment of this utility model: the connecting assembly includes connecting screws equidistantly distributed on opposite sides of the connecting member, an adjusting sleeve threaded to the outside of the connecting screws, and an adjusting head fixed at the center of the outside of the adjusting sleeve.

[0017] As a further embodiment of this utility model: the mounting heads are connected by connecting screws to form a relatively movable structure, and the two ends of the mounting heads are respectively embedded inside the connector.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. By setting up a sealing component, this utility model addresses the common problem of gaps appearing at the connection between components and the central shaft. The sealing ring seals the connection between the components and the central shaft, and the fixing ring secures the sealing ring and the central shaft. At the same time, for the gaps in the component connection, the connecting buckle and the pressing buckle squeeze the gaps, thereby reducing the gaps at the connection and reinforcing the components from the inside.

[0020] 2. This utility model, through the setting of the reinforcing components, uses sealing gaskets installed between the connecting pieces to seal the gaps. Since the sealing gaskets will change in volume over time, the sealing ring and L-shaped connecting bracket work together to adjust the gasket volume according to the change in the volume of the sealing gaskets, thereby ensuring the sealing performance.

[0021] 3. This utility model, through the setting of the connecting component, and through the rotation of the adjusting sleeve, due to the threaded connection structure between the adjusting sleeve and the connecting screw, can adjust the distance between the connecting parts until they are tightly connected to both sides of the mounting head, and complete the connection between the mounting head and the connecting head through the connecting parts. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall three-dimensional structure of a mechanical seal device for a centrifugal pump;

[0023] Figure 2 A schematic diagram of a reinforcement component structure for a centrifugal pump mechanical seal device;

[0024] Figure 3 A cross-sectional schematic diagram of a reinforcement component for a centrifugal pump mechanical seal device;

[0025] Figure 4 A schematic diagram of the mounting head structure of a centrifugal pump mechanical seal device;

[0026] Figure 5 This is a cross-sectional view of the mounting head of a centrifugal pump mechanical seal device.

[0027] In the diagram: 100, Pump components; 101, Pump body; 102, Base; 103, Mounting head; 105, Sealing assembly; 1051, Sealing ring; 1052, Fixing ring; 1053, Connecting buckle; 1054, Pressing buckle; 1055, Adjusting bolt; 200, Connecting mechanism; 201, Connecting piece; 202, Mounting groove; 203, Sealing gasket; 204, Connecting head; 205, Reinforcing assembly; 2051, Reinforcing ring; 2052, Rack groove; 2053, L-shaped connecting frame; 2054, Positioning tooth; 206, Connecting assembly; 2061, Connecting screw; 2062, Adjusting sleeve; 2063, Adjusting head. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Example 1:

[0032] Please see Figure 1 and Figure 5 This is the first embodiment of the present invention.

[0033] This embodiment provides a mechanical seal device for a centrifugal pump, including:

[0034] The pump assembly 100 includes a pump body 101, a base 102 fixed to the bottom of the pump body 101, a mounting head 103 mounted on one end of the pump body 101, a central shaft mounted at the center inside the mounting head 103, and a sealing assembly 105 mounted on the outside of the central shaft.

[0035] The connecting mechanism 200 includes a connecting piece 201 installed at one end of the pump body 101, a mounting groove 202 disposed in the connecting piece 201, a sealing gasket 203 disposed in the mounting groove 202, a connecting head 204 installed at both ends of the mounting head 103, a reinforcing component 205 disposed outside the connecting piece 201, and a connecting component 206 disposed between the connecting heads 204.

[0036] Specifically, the sealing assembly 105 includes a sealing ring 1051 sleeved on the outside of the central shaft, a fixing ring 1052 sleeved on the center of the outer side of the sealing ring 1051, connecting buckles 1053 equidistantly distributed on the side away from the center of the inner cavity of the mounting head 103, a pressing buckle 1054 slidably connected in the connecting buckle 1053, and an adjusting bolt 1055 rotatably connected to one end of the pressing buckle 1054.

[0037] Specifically, the sealing ring 1051 is made of rubber, and the fixing rings 1052 are connected by screws.

[0038] Specifically, the mounting head 103 and the pump body 101 are connected by a connector, and the mounting head 103 and the connector are connected by a connector 204.

[0039] Furthermore, during use, the sealing ring 1051 is fitted onto the outside of the central shaft, and the sealing ring 1051 is reinforced by the fixing ring 1052 to prevent the fixing ring 1052 from loosening over time. At the same time, inside the mounting head 103, the connecting buckle 1053 is fitted onto the outside of the component connection, and the position of the pressing buckle 1054 is locally fine-tuned by adjusting the adjusting bolt 1055. Thus, through the cooperation of the pressing buckle 1054 and the connecting buckle 1053, the gap of the component connection is reduced, preventing leakage.

[0040] During use, due to gaps in the connection between the central shaft and the components, leakage is likely to occur. The gaps at the connection of the central shaft are blocked by the fixing ring 1052. At the same time, the combination of the connecting buckle 1053 and the pressing buckle 1054 reinforces the assembly of the components from the inside. The connection between the components is reinforced by the interaction force between the moving pressing buckle 1054 and the connecting buckle 1053.

[0041] In summary, as the equipment is used for a longer period of time, the connection may become loose. The connection is reinforced from the inside by the connecting buckle 1053 and the pressing buckle 1054 to reduce the gap at the connection and prevent the parts from becoming loose. The gap at the connection is blocked from the outside by the fixing ring 1052 from the central shaft to prevent leakage caused by the gap at the connection.

[0042] Example 2:

[0043] Please see Figures 1-4 This is the second embodiment of the present utility model.

[0044] Specifically, the reinforcement component 205 includes a reinforcement ring 2051 sleeved on the outside of the connecting piece 201, a rack groove 2052 equidistantly opened inside one end of the reinforcement ring 2051, an L-shaped connecting frame 2053 slidably connected inside the rack groove 2052, and a positioning tooth 2054 fixed to the L-shaped connecting frame 2053 on the side near the center of the reinforcement ring 2051.

[0045] Specifically, the inner surface of the reinforcing ring 2051 is in contact with the outer surface of the connecting piece 201, and the connecting pieces 201 are connected by an L-shaped connecting frame 2053 and the reinforcing ring 2051 to form a movable connection structure.

[0046] Furthermore, during use, the pump body 101 and the connecting parts are connected by connecting pieces 201. After the connecting pieces 201 are connected by bolts, the fixing ring 1052 is sleeved on the outside of the connecting pieces 201, and the L-shaped connecting bracket 2053 is inserted into the inside of the rack groove 2052. Through the cooperation of the rack groove 2052 and the positioning tooth 2054, the adjusted position of the L-shaped connecting bracket 2053 can be fixed. After the inner surface of the L-shaped connecting bracket 2053 is attached to the connecting piece 201, the connection between the connecting piece 201 and the sealing gasket 203 can be strengthened. When the sealing gasket 203 ages and the connection becomes loose, the connection can be strengthened through the cooperation of the L-shaped connecting bracket 2053 and the fixing ring 1052.

[0047] Specifically, the connecting assembly 206 includes connecting screws 2061 evenly distributed on opposite sides of the connector, an adjusting sleeve 2062 threaded to the outside of the connecting screws 2061, and an adjusting head 2063 fixed to the center of the outside of the adjusting sleeve 2062.

[0048] Specifically, the mounting heads 103 are connected by a connecting screw 2061 to form a relatively movable structure, and the two ends of the mounting heads 103 are respectively embedded inside the connector.

[0049] Furthermore, the mounting head 103 is fitted inside the opposite side of the connector, and the adjusting head 2063 is rotated. The adjusting head 2063 drives the adjusting sleeve 2062 to rotate. Since the two ends of the inner surface of the adjusting sleeve 2062 are threadedly connected to the outer surface of the connecting screw 2061, the position of the connecting screw 2061 can be moved relatively during the rotation of the adjusting sleeve 2062, thereby pulling the position of the connector to move relatively, and completing the installation connection of the mounting head 103.

[0050] In use, rotating the adjusting head 2063 causes the adjusting sleeve 2062 to rotate, which in turn causes the connecting screw 2061 to move relative to the ground. The connecting screw 2061 then moves the connecting parts relative to the ground, thus completing the connection and fixing of the mounting head 103. After the connection between the mounting head 103 and the pump body 101 is completed, if any loosening occurs, the adjusting sleeve 2062 can be used to reinforce the connection of the mounting head 103, preventing loosening from occurring.

[0051] In summary, during the connection process, the connection between the connecting pieces 201 is reinforced by the L-shaped connecting bracket 2053. If loosening occurs, the connection between the connecting pieces 201 is reinforced by adjusting the position of the L-shaped connecting bracket 2053. If the connection of the mounting head 103 becomes loose, the connecting screw 2061 is moved relative to the mounting head by the adjusting sleeve 2062, thereby adjusting the distance between the connecting parts and ensuring the tightness of the connection.

[0052] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0054] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mechanical seal device for a centrifugal pump, characterized in that: include: The pump assembly (100) includes a pump body (101), a base (102) fixed to the bottom of the pump body (101), a mounting head (103) installed at one end of the pump body (101), a central shaft installed at the center inside the mounting head (103), and a sealing assembly (105) installed outside the central shaft. The connecting mechanism (200) includes a connecting piece (201) installed at one end of the pump body (101), a mounting groove (202) disposed in the connecting piece (201), a sealing gasket (203) disposed in the mounting groove (202), a connector (204) installed at both ends of the mounting head (103), a reinforcing component (205) disposed outside the connecting piece (201), and a connecting component (206) disposed between the connectors (204).

2. The centrifugal pump mechanical seal device according to claim 1, characterized in that: The sealing assembly (105) includes a sealing ring (1051) sleeved on the outside of the central shaft, a fixing ring (1052) sleeved on the center of the outside of the sealing ring (1051), a connecting buckle (1053) evenly distributed on the side away from the center of the inner cavity of the mounting head (103), a pressing buckle (1054) slidably connected in the connecting buckle (1053), and an adjusting bolt (1055) rotatably connected to one end of the pressing buckle (1054).

3. The centrifugal pump mechanical seal device according to claim 2, characterized in that: The sealing ring (1051) is made of rubber, and the fixing rings (1052) are connected to each other by screws.

4. The centrifugal pump mechanical seal device according to claim 1, characterized in that: The reinforcement component (205) includes a reinforcement ring (2051) sleeved on the outside of the connecting piece (201), a rack groove (2052) equidistantly opened inside one end of the reinforcement ring (2051), an L-shaped connecting frame (2053) slidably connected inside the rack groove (2052), and a positioning tooth (2054) fixed to the L-shaped connecting frame (2053) on the side near the center of the reinforcement ring (2051).

5. A centrifugal pump mechanical seal device according to claim 4, characterized in that: The inner surface of the reinforcing ring (2051) is in contact with the outer surface of the connecting piece (201), and the connecting pieces (201) are connected by an L-shaped connecting frame (2053) and the reinforcing ring (2051) to form a movable connection structure.

6. A centrifugal pump mechanical seal device according to claim 1, characterized in that: The mounting head (103) and the pump body (101) are connected by a connector, and the mounting head (103) and the connector are connected by a connector (204).

7. A centrifugal pump mechanical seal device according to claim 1, characterized in that: The connecting assembly (206) includes connecting screws (2061) evenly distributed on opposite sides of the connector, an adjusting sleeve (2062) threaded to the outside of the connecting screws (2061), and an adjusting head (2063) fixed to the center of the outside of the adjusting sleeve (2062).

8. A centrifugal pump mechanical seal device according to claim 7, characterized in that: The mounting heads (103) are connected by connecting screws (2061) to form a relatively movable structure, and the two ends of the mounting heads (103) are respectively embedded in the interior of the connector.

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