Packing gland for centrifugal pump

Abstract

The utility model discloses a packing gland for a centrifugal pump, and relates to the technical field of centrifugal pumps. The fixing device comprises a bottom plate, the top of the bottom plate is communicated with a vertical pipe, a thickening plate is arranged at the bottom of the bottom plate, a clamping and fixing mechanism is arranged between the bottom plate and the thickening plate, the clamping and fixing mechanism comprises a cavity, and the cavity is formed in the bottom plate. Through the unique clamping fixing mechanism, when the anti-pressure capability needs to be enhanced, the thickening plate and the bottom plate can be conveniently assembled, a user only needs to move the thickening plate, the connecting plate can be inserted into the cavity, the inserting plate is inserted into the inserting groove through the elastic potential energy of the spring, self-locking of the connecting plate is achieved, and fixing of the thickening plate is completed; the packing gland is simple in structure and easy and fast to operate, the bottom plate of the packing gland can be thickened according to different working environments through the design, and therefore the anti-pressure capacity is effectively improved, and the adaptability of the packing gland to different pressure environments is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, and in particular relates to a packing gland for centrifugal pumps. Background Technology

[0002] Originally, packing seals used fibers such as cotton and linen to plug the leakage channel to prevent liquid leakage, mainly as shaft seals for water lifting machinery. Because packing materials are widely available, easy to process, inexpensive, provide reliable sealing, and are simple to operate, they have been used to this day. Now, packing glands are widely used for shaft seals of centrifugal pumps, compressors, vacuum pumps, mixers, and ship propellers, as well as for reciprocating shaft seals of piston pumps, reciprocating compressors, and refrigeration machines, and for the rotation of valve stems in various valves.

[0003] However, there are some shortcomings in the existing centrifugal pump packing gland technology. One significant problem is the inconvenience of adjusting the thickness of the packing gland. In practical applications, different centrifugal pumps have different working conditions, pressures, temperatures, and characteristics of the liquids they pump, resulting in different requirements for the thickness of the packing gland. Traditional packing glands often use a fixed thickness design, or their thickness adjustment methods are very cumbersome, requiring a lot of disassembly and replacement of parts or the use of special tools for complex operations. This not only increases the difficulty of operation and time costs, but may also lead to excessive downtime of the equipment, affecting production efficiency.

[0004] To address these issues, we provide a packing gland for centrifugal pumps. Utility Model Content

[0005] The purpose of this utility model is to provide a packing gland for centrifugal pumps, which solves the problem of inconvenient thickness adjustment of packing glands in the prior art through the cooperation of a base plate, a thickened plate and a snap-fit ​​fixing mechanism.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a packing gland for a centrifugal pump, comprising a base plate with a vertical pipe connected to its top and a thickened plate at its bottom. A snap-fit ​​fixing mechanism is provided between the base plate and the thickened plate, the snap-fit ​​fixing mechanism comprising a cavity inside the base plate, connecting plates on both sides of the cavity, the bottom of the connecting plates being fixedly connected to the top of the thickened plate, a slot on the opposite side of the connecting plates, an insert plate inside the slot, a movable plate fixedly connected to the opposite side of the insert plate, and a spring fixedly connected to the opposite side of the movable plate. The base plate and the vertical pipe are integrally formed, ensuring strength during use. The thickened plate increases the thickness of the base plate, thereby improving the compressive strength of the packing gland for the centrifugal pump. The snap-fit ​​fixing mechanism is used to snap-fit ​​and fix the base plate and the thickened plate, providing a quick connection without the need for external tools, facilitating the installation and fixing of the thickened plate. The cavity houses its internal structure. The cooperation of the connecting plate, slot, insert plate, movable plate, and spring achieves the connection between the base plate and the thickened plate.

[0008] The present invention is further configured such that a groove is provided at the top of the inner cavity of the cavity, a sliding rod is fixedly connected to the inner wall of the groove, a sliding sleeve is slidably connected to the surface of the sliding rod, and the bottom of the sliding sleeve is fixedly connected to the top of the moving plate. The groove, the sliding rod, and the sliding sleeve connected to the moving plate in the cavity make the movement of the moving plate more stable and smooth, avoiding possible deviation or jamming during operation, ensuring the reliability and accuracy of the locking and fixing mechanism, and helping to improve the performance stability and reliability of the entire packing gland during use.

[0009] The present invention is further configured such that a moving rod is fixedly connected to the front of the moving plate, and a moving groove is provided on the surface of the base plate to cooperate with the moving rod. By setting a moving rod on the front of the moving plate and opening a moving groove on the surface of the base plate to cooperate with the moving rod, the operation of the moving plate is not only convenient, but also the movement of the moving plate is more controllable and intuitive.

[0010] The present invention is further configured such that positioning holes are provided on both sides of the bottom of the base plate, and positioning rods are provided in the inner cavity of the positioning holes. The bottom of the positioning rods is fixedly connected to the top of the thickened plate. The positioning holes and positioning rods further enhance the positioning accuracy and connection stability between the base plate and the thickened plate.

[0011] The present invention is further configured such that an annular groove is provided on the top of the base plate, and a first arc-shaped pad and a second arc-shaped pad are respectively provided in the inner cavity of the annular groove. The annular groove is used to accommodate the first arc-shaped pad and the second arc-shaped pad. The first arc-shaped pad and the second arc-shaped pad ensure the sealing of the connection between the material pressure cover and the centrifugal pump during use.

[0012] The present invention is further configured such that a snap-fit ​​block is fixedly connected to one side of the first arc-shaped pad, and a snap-fit ​​groove for cooperating with the snap-fit ​​block is opened on one side of the second arc-shaped pad. The design of the snap-fit ​​block on the first arc-shaped pad and the snap-fit ​​groove on the second arc-shaped pad enables the first arc-shaped pad and the second arc-shaped pad to achieve a tight snap-fit ​​engagement, ensuring the stability of their relative positions and preventing relative movement or misalignment due to fluid flow or pressure during use.

[0013] The present invention is further configured such that a receiving groove is provided on the front side of the base plate, and a nameplate is fixedly connected to the inner wall of the receiving groove. The receiving groove is used to fix the nameplate, and the nameplate indicates the specification information of the packing gland for the centrifugal pump.

[0014] The present invention is further configured such that first through holes are provided on both sides of the top of the base plate and both sides of the bottom of the thickened plate, and second through holes are provided on both the top of the base plate and the bottom of the thickened plate. The first through holes are used to cooperate with the fixing components to fix the packing gland of the centrifugal pump in a designated position.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model, through a unique snap-fit ​​fixing mechanism, allows for easy assembly of the thickened plate and the base plate when enhanced pressure resistance is required. The user only needs to move the thickened plate to allow the connecting plate to be inserted into the cavity. The elastic potential energy of the spring causes the insert plate to be inserted into the slot, achieving self-locking of the connecting plate and completing the fixing of the thickened plate. The operation is simple and quick. This design allows the packing gland to thicken the base plate according to different working environments, thereby effectively improving the pressure resistance and enhancing the packing gland's adaptability to different pressure environments.

[0017] 2. When the thickened plate needs to be disassembled, the user can move the moving rod to move the moving plate and the insert plate, so that the insert plate is separated from the slot, and then the thickened plate can be easily moved downward to complete the disassembly operation. The installable and disassembleable characteristics of the thickened plate greatly improve the flexibility of the packing gland, making it suitable for various working environments, improving the applicability of the packing gland for centrifugal pumps, and helping to better meet the needs of centrifugal pumps under different working conditions. 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.

[0019] Figure 1 This is a perspective view of a packing gland used in a centrifugal pump.

[0020] Figure 2 This is a first-view partial cross-sectional perspective view of a packing gland used in a centrifugal pump.

[0021] Figure 3 This is a second-view partial cross-sectional perspective view of a packing gland used in a centrifugal pump.

[0022] Figure 4 This is a perspective view of a first arc-shaped gasket and a second arc-shaped gasket in a packing gland for a centrifugal pump.

[0023] Figure 5 For a packing gland used in a centrifugal pump Figure 2 A magnified schematic diagram of a portion of the structure of A.

[0024] In the attached diagram: 1. Base plate; 2. Vertical tube; 3. Thickened plate; 4. Snap-fit ​​fixing mechanism; 401. Cavity; 402. Connecting plate; 403. Slot; 404. Insert plate; 405. Moving plate; 406. Spring; 4011. Groove; 4012. Slide rod; 4013. Slide sleeve; 4051. Moving rod; 4052. Moving groove; 101. Positioning hole; 102. Positioning rod; 5. Annular groove; 6. First arc-shaped pad; 7. Second arc-shaped pad; 601. Snap-fit ​​block; 602. Snap-fit ​​groove; 8. Receiving groove; 9. Nameplate. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0026] Please see Figure 1-5 This utility model is a packing gland for a centrifugal pump, including a base plate 1, a vertical pipe 2 connected to the top of the base plate 1, a thickened plate 3 provided at the bottom of the base plate 1, and a snap-fit ​​fixing mechanism 4 provided between the base plate 1 and the thickened plate 3. The snap-fit ​​fixing mechanism 4 includes a cavity 401, which is opened inside the base plate 1. Connecting plates 402 are provided on both sides of the cavity 401. The bottom of the connecting plate 402 is fixedly connected to the top of the thickened plate 3. A slot 403 is opened on the opposite side of the connecting plate 402. An insert plate 404 is provided in the cavity of the slot 403. A movable plate 405 is fixedly connected to the opposite side of the insert plate 404. A spring 406 is fixedly connected to the opposite side of the movable plate 405.

[0027] Specifically: the base plate 1 and the vertical pipe 2 are integrally formed to ensure strength during use. The thickened plate 3 is used to increase the thickness of the base plate 1, thereby improving the compressive strength of the packing gland for the centrifugal pump. The snap-fit ​​fixing mechanism 4 is used to snap-fit ​​and fix the base plate 1 and the thickened plate 3. The connection method is quick and does not require external tools, making it easy to install and fix the thickened plate 3. The cavity 401 is used to house its internal structure. The cooperation of the connecting plate 402, slot 403, insert plate 404, moving plate 405 and spring 406 realizes the connection between the base plate 1 and the thickened plate 3. Example

[0028] Please see Figure 1-5 Based on Embodiment 1, a groove 4011 is formed at the top of the inner cavity of the cavity 401. A sliding rod 4012 is fixedly connected to the inner wall of the groove 4011. A sliding sleeve 4013 is slidably connected to the surface of the sliding rod 4012. The bottom of the sliding sleeve 4013 is fixedly connected to the top of the moving plate 405. A moving rod 4051 is fixedly connected to the front of the moving plate 405. A moving groove 4052 is formed on the surface of the bottom plate 1 to cooperate with the moving rod 4051. Positioning holes 101 are formed on both sides of the bottom of the bottom plate 1. A positioning rod 102 is provided in the inner cavity of the positioning hole 101 for positioning. The bottom of rod 102 is fixedly connected to the top of thickened plate 3. The top of base plate 1 has an annular groove 5. The inner cavity of the annular groove 5 is provided with a first arc-shaped pad 6 and a second arc-shaped pad 7. A snap-fit ​​block 601 is fixedly connected to one side of the first arc-shaped pad 6. A snap-fit ​​groove 602 for use with snap-fit ​​block 601 is opened on one side of the second arc-shaped pad 7. A receiving groove 8 is opened on the front of base plate 1. A nameplate 9 is fixedly connected to the inner wall of receiving groove 8. First through holes are opened on both sides of the top of base plate 1 and both sides of the bottom of thickened plate 3. Second through holes are opened on both the top of base plate 1 and the bottom of thickened plate 3.

[0029] Specifically: the groove 4011 and slide rod 4012 inside the cavity 401, as well as the sliding sleeve 4013 connected to the moving plate 405, make the movement of the moving plate 405 more stable and smooth, avoiding possible skewing or jamming during operation, ensuring the reliability and accuracy of the locking and fixing mechanism 4, and helping to improve the performance stability and reliability of the entire packing gland during use. By setting the moving rod 4051 on the front of the moving plate 405 and opening the moving groove 4052 on the surface of the base plate 1 to cooperate with the movement of the moving rod 4051, it not only facilitates the operation of the moving plate 405, but also makes the movement of the moving plate 405 more controllable and intuitive. The setting of the positioning hole 101 and the positioning rod 102 further strengthens the base plate. The positioning accuracy and connection stability between plate 1 and thickened plate 3 are ensured. The annular groove 5 is used to accommodate the first arc-shaped pad 6 and the second arc-shaped pad 7. The first arc-shaped pad 6 and the second arc-shaped pad 7 ensure the sealing of the connection between the packing gland and the centrifugal pump during use. The design of the snap-fit ​​block 601 on the first arc-shaped pad 6 and the snap-fit ​​groove 602 on the second arc-shaped pad 7 enables a tight snap-fit ​​between the first arc-shaped pad 6 and the second arc-shaped pad 7, ensuring the stability of their relative positions and preventing relative movement or misalignment due to fluid flow or pressure during use. The receiving groove 8 is used to fix the nameplate 9, which is marked with the specification information of the packing gland for the centrifugal pump. The first through hole is used to fix the packing gland for the centrifugal pump in a designated position with the fastener.

[0030] The working principle of this utility model is as follows: The thickness of the thickened plate 3 is set according to the usage requirements. The base plate 1, together with the vertical pipe 2, can directly form a packing gland for centrifugal pumps. When it is necessary to thicken the base plate 1 to improve its compressive strength, the user moves the thickened plate 3 to insert the connecting plate 402 into the cavity 401. During the process of the connecting plate 402 entering the cavity 401, it will squeeze the insert plate 404, causing the insert plate 404 to move. The insert plate 404 drives the moving plate 405 to move. The moving plate 405 moves and squeezes the spring 406. The spring 406 deforms and generates elastic potential energy. When the connecting plate 402 is fully inserted into the cavity 401, the spring 406... The elastic potential energy drives the movable plate 405 to reset, and the movable plate 405 drives the insert plate 404 to insert into the slot 403, thereby achieving self-locking of the connecting plate 402, that is, fixing the thickened plate 3 to the bottom of the base plate 1. When it is necessary to disassemble the thickened plate 3, the user moves the movable rod 4051, which drives the movable plate 405 to move. The movement of the movable plate 405 causes the insert plate 404 to separate from the slot 403, and then the thickened plate 3 can be moved downward to disassemble it. The installation and disassembly of the thickened plate 3 makes the centrifugal pump packing gland suitable for different working environments, improving the applicability of the centrifugal pump packing gland.

[0031] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A packing gland for a centrifugal pump comprising a base plate (1), characterised in that: The bottom plate (1) top is communicated with a vertical pipe (2), the bottom plate (1) bottom is provided with thickening plate (3), the bottom plate (1) and thickening plate (3) between being provided with the clamping fixing mechanism (4); The clamping fixing mechanism (4) includes a cavity (401), the cavity (401) is opened in the bottom plate (1) inside, the cavity (401) both sides are provided with the connecting plate (402), the connecting plate (402) bottom is fixedly connected with the thickening plate (3) top, the connecting plate (402) opposite side is provided with the insertion slot (403), the insertion slot (403) inner cavity is provided with the insertion plate (404), the insertion plate (404) opposite side is fixedly connected with the moving plate (405), the moving plate (405) opposite side is fixedly connected with the spring (406).

2. A packing gland for a centrifugal pump according to claim 1, characterized in that: The cavity (401) inner cavity top is provided with a recess (4011), the recess (4011) inner wall is fixedly connected with the sliding rod (4012), the sliding rod (4012) surface is slidably connected with the sliding sleeve (4013), the sliding sleeve (4013) bottom is fixedly connected with the moving plate (405) top.

3. A packing gland for a centrifugal pump according to claim 1, wherein: The moving plate (405) front is fixedly connected with the moving rod (4051), the bottom plate (1) surface is provided with the moving slot (4052) that cooperates the movement of moving rod (4051).

4. A packing gland for a centrifugal pump according to claim 1, wherein: The bottom plate (1) bottom both sides are provided with the positioning hole (101), the positioning hole (101) inner cavity is provided with the positioning rod (102), the positioning rod (102) bottom is fixedly connected with the thickening plate (3) top.

5. A packing gland for a centrifugal pump according to claim 1, wherein: The bottom plate (1) top is provided with annular groove (5), the annular groove (5) inner cavity is provided with first arc pad (6) and second arc pad (7) respectively.

6. A packing gland for a centrifugal pump according to claim 5, wherein: The first arc pad (6) one side is fixedly connected with the clamping block (601), the second arc pad (7) one side is provided with the clamping slot (602) that cooperates the use of clamping block (601).

7. A packing gland for a centrifugal pump according to claim 1, wherein: The bottom plate (1) front is provided with the accommodation slot (8), the accommodation slot (8) inner wall is fixedly connected with the nameplate (9).

8. A packing gland for a centrifugal pump according to claim 1, wherein: The bottom plate (1) top both sides and thickening plate (3) bottom both sides are provided with first through-hole, the bottom plate (1) top and thickening plate (3) bottom are provided with second through-hole.

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