Mechanical sealing structure for pumping fluid

Abstract

The utility model discloses a mechanical sealing structure for pumping fluid, and relates to the technical field of mechanical sealing. The quick-mounting sealing device comprises a shell, a quick-mounting mechanism and a sealing mechanism are arranged on the shell, the quick-mounting mechanism comprises a mounting assembly and a plurality of dismounting and mounting assemblies, the mounting assembly comprises a mounting groove formed in the front side of the shell, and a connecting ring is arranged in the mounting groove. The dismounting and mounting assembly comprises a cylindrical shell fixedly connected to the front side of the shell, a sliding rod penetrates through the cylindrical shell, the cylindrical shell is slidably connected with the sliding rod, and a sliding block is fixedly connected to the outer wall of the sliding rod. By arranging the quick-mounting mechanism, the problems that an existing mechanical sealing structure for pumping fluid is inconvenient to update and maintain during use, a large amount of time and energy need to be consumed during replacement or maintenance of the sealing structure, the sealing structure can only be contacted by disassembling a large amount of peripheral parts, the maintenance work progress is slow, and the maintenance cost is high are solved. And the downtime of the equipment is greatly prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical seal technology, and in particular relates to a mechanical seal structure for pumping fluid. Background Technology

[0002] With the continuous advancement of industrial technology, pumping fluid machinery plays a vital role in many fields such as chemical, petroleum, and pharmaceutical industries. As a key component for ensuring stable equipment operation and preventing media leakage, the performance and reliability of its sealing structure are receiving increasing attention. Pumping fluid machinery requires a sealing structure that connects the pump body and the rotating shaft to ensure a low leakage rate during long-term operation, thereby maintaining the safety and cleanliness of the production environment.

[0003] However, the existing mechanical seal structure for pumping fluids is inconvenient to update and maintain during use. Replacing or repairing the seal structure requires a lot of time and effort, and a lot of disassembly of surrounding components is required to access the seal structure, resulting in slow progress of maintenance work and significantly extended equipment downtime. Utility Model Content

[0004] The purpose of this utility model is to provide a pumping fluid mechanical seal structure. By setting up a quick-installation mechanism, it solves the problems of existing pumping fluid mechanical seal structures being inconvenient to update and maintain during use, requiring a lot of time and effort to replace or repair the seal structure, and extensive disassembly of surrounding components to access the seal structure, resulting in slow progress of maintenance work and significantly extended equipment downtime.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a mechanical seal structure for pumping fluid, including a housing, on which a quick-installation mechanism and a sealing mechanism are provided;

[0007] The quick-installation mechanism includes an installation component and several disassembly and installation components. The installation component includes an installation groove on the front side of the housing, and a connecting ring is provided in the installation groove. The disassembly and installation components include a cylindrical shell fixedly connected to the front side of the housing, a sliding rod passing through the cylindrical shell, and the cylindrical shell and the sliding rod being slidably connected. A slider is fixedly connected to the outer wall of the sliding rod, and the slider is slidably connected to the cylindrical shell. A spring is sleeved on the outer wall of the sliding rod, and the front and back of the spring are fixedly connected to the cylindrical shell and the slider, respectively.

[0008] Furthermore, a limiting block is fixedly connected to the outer wall of the connecting ring, the back of the limiting block is in contact with the mounting groove, the bottom of the slide rod passes through the limiting block, and the limiting block is slidably connected to the slide rod.

[0009] Furthermore, the sealing mechanism includes a rubber ring fixedly connected to the inner wall of the connecting ring, and the rubber ring has an L-shaped groove inside.

[0010] Furthermore, a metal insert is provided inside the L-shaped annular groove, and a rubber connecting ring is fixedly connected to the inner wall of the rubber ring.

[0011] Furthermore, a second rubber ring is fixedly connected to the back of the rubber connecting ring, a first rubber sealing ring is fixedly connected to the inner wall of the rubber connecting ring, and a spring groove is formed inside the second rubber ring.

[0012] Furthermore, an annular spring is provided in the spring groove, and a rubber sealing ring is fixedly connected to the inner wall of the second rubber ring.

[0013] Furthermore, a support frame is fixedly connected to the back of the housing, and a rotating shaft passes through the support frame. The rotating shaft is rotatably connected to the support frame, and the outer walls of both the first rubber sealing ring and the second rubber sealing ring are in contact with the rotating shaft.

[0014] This utility model has the following beneficial effects:

[0015] 1. When installing the sealing structure using a quick-release mechanism, pull the slide rod forward. The disassembly and installation assembly causes the slider to slide forward within the cylindrical shell, compressing the spring. At this point, the tail of the slide rod moves forward within the installation groove. Continue this process until the tail of the slide rod leaves the installation groove. Similarly, lift the other two slide rods, causing the tails of all three slide rods to simultaneously leave the installation groove. Then, pick up the connecting ring and align its three limiting blocks with the three exposed slots on the front side of the cylindrical shell. Push it into the installation groove perpendicular to the surface of the shell. When it reaches the appropriate angle, i.e., when the cylindrical hole on the limiting block coincides with the central axis of the slide rod, release the slide rod. The spring rebounds, causing the slide rod to return to its original position, allowing the tail of the disassembly and installation assembly to move forward. The limit block is locked, and similarly, the other two springs will also lock their corresponding limit blocks, thus realizing the installation of the connecting ring and the sealing structure on the connecting ring. At this time, the rotating shaft on the support frame is in close contact with the second rubber sealing ring and the first rubber sealing ring. Apply appropriate lubricant to the contact point for use. When the device needs to be disassembled, simply lift the three slide rods. Similar to the above process, after the tails of the three slide rods leave the mounting groove, the sealing mechanism can be removed. This allows the sealing structure to be easily removed by simply lifting the three slide rods when it needs to be updated or maintained. After inspection and maintenance, it can be quickly reinstalled, thereby reducing equipment downtime and speeding up the project progress.

[0016] 2. By setting up a sealing mechanism, after the sealing mechanism is installed, when the motor connected to the rotating shaft is turned on, since the rubber ring 1, rubber connecting ring, rubber ring 2, rubber sealing ring 1, and rubber sealing ring 2 are all made of nitrile rubber, which has excellent oil resistance, good wear resistance, heat resistance, aging resistance, and good chemical stability, it can keep rubber sealing ring 2 and rubber sealing ring 1 in constant contact with the rotating shaft when the shaft rotates. An oil film will form on the contact surface between the two and the rotating shaft. This oil film has fluid lubrication characteristics. Under the influence of liquid surface tension, the stiffness of the oil film is just enough to form a crescent at the contact end between the oil film and the air, thus preventing fluid leakage on the back of the housing while avoiding oil leakage inside the housing and contamination of the transmitted fluid. The ring spring will generate axial pressure on the second rubber ring, causing the second rubber ring to squeeze the second rubber sealing ring. Even when the second rubber sealing ring wears, it will still be squeezed by the elastic force to continue to stick tightly to the rotating shaft, ensuring the sealing work. This ensures that the dynamic sealing interface between the pump body and the rotating shaft is tightly fitted, effectively preventing fluid leakage, thereby reducing fluid waste, lowering the equipment failure rate, and extending the service life of the equipment.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the front sectional structure of the present invention;

[0021] Figure 3 This utility model Figure 1 A magnified structural diagram of A in the middle;

[0022] Figure 4 This is a partial cross-sectional view of the sealing mechanism of this utility model;

[0023] Figure 5 This utility model Figure 4 A magnified structural diagram of B in the diagram;

[0024] Figure 6 This is a schematic diagram of the rear cross-sectional structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the front structure of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Housing; 2. Quick-installation mechanism; 21. Mounting assembly; 211. Mounting groove; 212. Connecting ring; 22. Disassembly and installation assembly; 221. Cylindrical shell; 222. Slide rod; 223. Slider; 224. Spring; 225. Limiting block; 3. Sealing mechanism; 311. Rubber ring one; 312. L-shaped ring groove; 313. Metal insert; 314. Rubber connecting ring; 315. Rubber ring two; 316. Rubber sealing ring one; 317. Spring groove; 318. Ring spring; 319. Rubber sealing ring two; 3110. Support frame; 3111. Rotating shaft. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-7As shown, this utility model is a mechanical seal structure for pumping fluid, including a housing 1. A quick-installation mechanism 2 and a sealing mechanism 3 are provided on the housing 1. The quick-installation mechanism 2 includes an installation component 21 and several disassembly and installation components 22. The installation component 21 includes an installation groove 211 formed on the front side of the housing 1, and a connecting ring 212 is provided in the installation groove 211. The disassembly and installation components 22 include a cylindrical shell 221 fixedly connected to the front side of the housing 1, with a sliding rod 222 passing through the cylindrical shell 221. The cylindrical shell 221 and the sliding rod 222 are slidably connected. A slider 223 is fixedly connected to the outer wall of the sliding rod 222. Block 223 is slidably connected to cylindrical shell 221. A spring 224 is sleeved on the outer wall of slide rod 222. The front and back of spring 224 are fixedly connected to cylindrical shell 221 and slide rod 223, respectively. A limiting block 225 is fixedly connected to the outer wall of connecting ring 212. The back of limiting block 225 contacts mounting groove 211. The bottom of slide rod 222 passes through limiting block 225. Limiting block 225 is slidably connected to slide rod 222. By setting a quick-installation mechanism, when updates and maintenance are needed, the sealing structure can be easily removed by simply lifting the three slide rods. After inspection and maintenance, it can be quickly installed. Returning to the original location reduces equipment downtime and speeds up project progress. The sealing mechanism 3 includes a rubber ring 311 fixedly connected to the inner wall of the connecting ring 212. An L-shaped groove 312 is formed inside the rubber ring 311, and a metal insert 313 is placed inside the L-shaped groove 312. A rubber connecting ring 314 is fixedly connected to the inner wall of the rubber ring 311. A rubber ring 315 is fixedly connected to the back of the rubber connecting ring 314. A rubber sealing ring 316 is fixedly connected to the inner wall of the rubber connecting ring 314. A spring groove 317 is formed inside the rubber ring 315, and an annular... A rubber sealing ring 319 is fixedly connected to the inner wall of spring 318 and rubber ring 315. A support frame 3110 is fixedly connected to the back of housing 1. A rotating shaft 3111 passes through the support frame 3110 and is rotatably connected to the support frame 3110. The outer walls of rubber sealing ring 316 and rubber sealing ring 319 are in contact with the rotating shaft 3111. By setting a sealing mechanism, the dynamic sealing interface between the pump body and the rotating shaft can be ensured to fit tightly, effectively preventing fluid leakage, thereby reducing fluid waste, reducing equipment failure rate, and extending equipment service life.

[0030] A specific application of this embodiment is as follows: In use, first install the sealing structure, pull the slide rod 222 forward, disassemble the mounting assembly 22 to cause the slider 223 to slide forward within the cylindrical shell 221, compressing the spring 224. At this time, the tail of the slide rod 222 moves forward within the mounting groove 211. This continues until the tail of the slide rod 222 leaves the mounting groove 211. Similarly, lift the other two slide rods 222, causing the tails of all three slide rods 222 to simultaneously leave the mounting groove 211. Then, pick up the connecting ring 212 and place it on... The three limiting blocks 225 are aligned with the three exposed slots on the front side of the cylindrical shell 221, and pushed into the mounting groove 211 in a direction perpendicular to the surface of the shell 1. When rotated to a suitable angle, that is, when the cylindrical hole on the limiting block 225 coincides with the central axis of the slide rod 222, the slide rod 222 is released, and the spring 224 rebounds, causing the slide rod 222 to return to its original position, so that the tail of the disassembly and installation assembly 22 locks the limiting block 225. Similarly, the other two springs 224 will also lock their corresponding limiting blocks 225, thereby realizing the connection of the ring 212. The installation also achieves the installation of the sealing structure on the connecting ring 212. At this time, the rotating shaft 3111 on the support frame 3110 is in close contact with the second rubber sealing ring 319 and the first rubber sealing ring 316. Applying appropriate lubricant to the contact point is sufficient for use. When disassembling the device, simply lift the three sliding rods 222. Similar to the above process, once the tails of the three sliding rods 222 have left the mounting groove 211, the sealing mechanism can be removed. After the sealing mechanism is installed, the motor connected to the rotating shaft 3111 can be turned on. Rubber ring 311, rubber connecting ring 314, rubber ring 315, rubber sealing ring 316, and rubber sealing ring 319 are all made of nitrile rubber, which has excellent oil resistance, such as resistance to mineral oil, animal and vegetable oils, and liquid fuels. It also has good wear resistance, heat resistance, aging resistance, and good chemical stability. This ensures that rubber sealing ring 319 and rubber sealing ring 316 remain in contact with the shaft 3111 during rotation, and an oil film forms on their contact surfaces. This oil film exhibits fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film is just enough to form a crescent at the contact end between the oil film and the air, thereby preventing fluid leakage on the back of the housing 1 and avoiding oil leakage inside the housing 1, which would contaminate the transmitted fluid. The ring spring 318 will generate axial pressure on the rubber ring 315, causing the rubber ring 315 to squeeze the rubber sealing ring 319. When the rubber sealing ring 319 wears, it will also be squeezed by the elastic force to continue to stick tightly to the rotating shaft 3111, ensuring the sealing work.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mechanical seal structure for pumping fluid, characterized in that: Includes a housing (1), on which a quick-installation mechanism (2) and a sealing mechanism (3) are provided; The quick-installation mechanism (2) includes an installation component (21) and several disassembly and installation components (22). The installation component (21) includes an installation groove (211) opened on the front side of the housing (1). A connecting ring (212) is provided in the installation groove (211). The disassembly and installation component (22) includes a cylindrical shell (221) fixedly connected to the front side of the housing (1). A slide rod (222) passes through the cylindrical shell (221). The cylindrical shell (221) is slidably connected to the slide rod (222). A slider (223) is fixedly connected to the outer wall of the slide rod (222). The slider (223) is slidably connected to the cylindrical shell (221). A spring (224) is sleeved on the outer wall of the slide rod (222). The front and back of the spring (224) are fixedly connected to the cylindrical shell (221) and the slider (223) respectively.

2. The mechanical seal structure for pumping fluid according to claim 1, characterized in that, A limiting block (225) is fixedly connected to the outer wall of the connecting ring (212). The back of the limiting block (225) is in contact with the mounting groove (211). The bottom of the slide rod (222) passes through the limiting block (225). The limiting block (225) and the slide rod (222) are slidably connected.

3. The mechanical seal structure for pumping fluid according to claim 2, characterized in that, The sealing mechanism (3) includes a rubber ring (311) fixedly connected to the inner wall of the connecting ring (212), and an L-shaped ring groove (312) is provided in the rubber ring (311).

4. The pumping fluid mechanical seal structure according to claim 3, characterized in that, A metal insert (313) is provided in the L-shaped annular groove (312), and a rubber connecting ring (314) is fixedly connected to the inner wall of the rubber ring (311).

5. The mechanical seal structure for pumping fluid according to claim 4, characterized in that, A second rubber ring (315) is fixedly connected to the back of the rubber connecting ring (314), a first rubber sealing ring (316) is fixedly connected to the inner wall of the rubber connecting ring (314), and a spring groove (317) is provided in the second rubber ring (315).

6. The mechanical seal structure for pumping fluid according to claim 5, characterized in that, A ring spring (318) is provided in the spring groove (317), and a rubber sealing ring (319) is fixedly connected to the inner wall of the second rubber ring (315).

7. The mechanical seal structure for pumping fluid according to claim 6, characterized in that, A support frame (3110) is fixedly connected to the back of the housing (1). A rotating shaft (3111) passes through the support frame (3110). The rotating shaft (3111) is rotatably connected to the support frame (3110). The outer walls of the first rubber sealing ring (316) and the second rubber sealing ring (319) are in contact with the rotating shaft (3111).

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