Chemical centrifugal pump shell

Abstract

The utility model provides a pump case of a chemical centrifugal pump, which relates to the technical field of chemical centrifugal pumps and comprises a pump case, a liquid discharge channel arranged on the bottom surface of the pump case, an upper sealing plate arranged in the liquid discharge channel, a lower sealing plate rotationally connected in the liquid discharge channel, and a gear arranged between the upper sealing plate and the lower sealing plate. The hinged edges of the upper sealing plate and the lower sealing plate are located on the same side, the opposite faces of the upper sealing plate and the lower sealing plate are rotationally connected with an upper arc-shaped rack and a lower arc-shaped rack correspondingly, the lower sealing plate is dragged to achieve rotation of the lower arc-shaped rack, then the upper arc-shaped rack is driven by the meshed gears to move, and rotary opening of the upper sealing plate is achieved. Liquid in the pump shell is discharged through the liquid discharging channel, and when the liquid in the pump shell is discharged, the liquid flows through the surface of the inclined lower sealing plate and does not enter the connecting hole, so that an operator can be prevented from being hurt.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical centrifugal pumps, in particular to a pump casing of a chemical centrifugal pump. Background Art

[0002] A chemical centrifugal pump refers to a centrifugal pump used in the chemical industry. Compared with other types of pumps, a chemical centrifugal pump has the advantages of simple structure, low wear, smooth operation, low noise, uniform water discharge, easy adjustment, and high efficiency. Therefore, it has certain requirements for the pump casing.

[0003] Therefore, a chemical centrifugal pump casing in the prior art, with the publication number CN220415791U, first tightens the first plug. When there is pressure in the flow cavity, the sealing cover will be pressed tighter and tighter, thereby achieving the first sealing. Then, the second plug is tightened to achieve the secondary seal. After unscrewing the second plug, the maintenance personnel use an L-shaped wrench to push the top block to open the sealing cover. By adding the design of the top block, the maintenance personnel are always indirectly at the center of the vertical top sealing cover.

[0004] However, under the action of the internal pressure of the flow cavity, the cover will be forced to be pressed tightly. Therefore, when using the L-shaped wrench to push the top block to open the cover, the pressure inside the flow cavity needs to be overcome. At the moment the cover is opened, the pressure inside the flow cavity is suddenly released, and the residual liquid inside will be sprayed out. Part of the liquid will flow along the surface of the L-shaped wrench to the operator's hand, which may easily cause accidental injury to the operator. Utility Model Content

[0005] The utility model aims to solve the problems existing in the prior art and proposes a pump casing for a chemical centrifugal pump.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pump casing of a chemical centrifugal pump, comprising a pump casing, a drainage channel opened on the bottom surface of the pump casing and an upper sealing plate in the drainage channel, the drainage channel is also rotatably connected with a lower sealing plate and a gear located between the upper sealing plate and the lower sealing plate, the hinged edges of the upper sealing plate and the lower sealing plate are located on the same side, and the opposite surfaces of the upper sealing plate and the lower sealing plate are rotatably connected with an upper arc-shaped rack and a lower arc-shaped rack respectively, the upper arc-shaped rack and the lower arc-shaped rack are staggered and distributed, and are both meshed with the gear tooth surface, a connecting hole is opened on one side of the inner wall of the drainage channel, a connecting column is slidably connected in the connecting hole, one end of the connecting column extends to one side of the lower sealing plate, and is plugged into one side of the lower sealing plate.

[0007] Preferably, the connecting column extends to one side of the lower sealing plate in a columnar T-shaped configuration, and the bottom surface of the lower sealing plate is fixedly connected to a slide rail plugged into the end surface of the connecting column.

[0008] Preferably, a blocking bolt is threadedly connected at the bottom position in the drainage channel, and a protrusion for fixing the lower sealing plate is fixedly connected to the end of the blocking bolt.

[0009] Preferably, an adjustment channel connected to the connecting hole is provided at the bottom of the end surface of the outer wall of the pump casing, a slider is slidably connected in the adjustment channel, one side of the slider is inclined and provided with a guide groove, and the other end of the connecting column is fixedly connected to a connecting block slidably connected to the inner wall of the guide groove.

[0010] Preferably, an adjusting bolt which is rotatably connected to the side of the sliding block is threadedly connected in the adjusting channel.

[0011] Preferably, the cross-section of the portion where the adjustment channel cooperates with the slider is rectangular, and the portion where the adjustment channel cooperates with the adjustment bolt is in the shape of an internal threaded hole.

[0012] Preferably, the cross-sections of the drainage channels located at the upper sealing plate and the lower sealing plate are both rectangular.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, the lower arc-shaped rack is rotated by dragging the lower sealing plate, and then the meshing gear drives the upper arc-shaped rack to move, that is, the upper sealing plate is rotated and opened, and the liquid in the pump casing is discharged through the discharge channel. When the liquid in the pump casing is discharged, the liquid flows through the inclined surface of the lower sealing plate and will not enter the connecting hole, thereby avoiding injury to the operator.

[0015] 2. In the utility model, the sliding block of the rotation connection is made to slide in the adjustment channel by rotating the adjusting bolt, and the guide groove at the inclined surface is used to make the other end of the connecting column slide in the guide groove and change the height. Therefore, by sliding the sliding block, the connecting column can be extended and retracted in the connecting hole, and the lower sealing plate can be swung. In addition, during the adjustment process, personnel stay away from the drainage channel, so the sprayed liquid will not fall on them. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of a chemical centrifugal pump casing is proposed for the utility model;

[0017] Figure 2 A chemical centrifugal pump casing is proposed for this utility model Figure 1 A schematic cross-sectional structure diagram of ;

[0018] Figure 3 A chemical centrifugal pump casing is proposed for this utility model Figure 2 A schematic cross-sectional structure diagram of ;

[0019] Figure 4A chemical centrifugal pump casing is proposed for this utility model Figure 3 Schematic diagram of the structure viewed from above;

[0020] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0021] Legend: 1. Pump casing; 2. Adjusting bolt; 3. Sealing bolt; 4. Guide groove; 5. Connecting block; 6. Connecting column; 7. Upper sealing plate; 8. Lower sealing plate; 9. Gear; 10. Upper arc-shaped rack; 11. Bump; 12. Lower arc-shaped rack; 13. Sliding block; 14. Drain channel; 15. Adjusting channel; 16. Connecting hole; 17. Slide rail. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0024] like Figure 1-5 As shown, a pump casing of a chemical centrifugal pump comprises a pump casing 1, a drainage channel 14 provided on the bottom surface of the pump casing 1 and an upper sealing plate 7 in the drainage channel 14, a lower sealing plate 8 is rotatably connected in the drainage channel 14, and a gear 9 located between the upper sealing plate 7 and the lower sealing plate 8, the hinged edges of the upper sealing plate 7 and the lower sealing plate 8 are located on the same side, and the upper and lower arc-shaped racks 10 and 12 are rotatably connected on the opposite surfaces of the upper and lower sealing plates 7 and 8, respectively, the upper and lower arc-shaped racks 10 and 12 are staggered and meshed with the tooth surface of the gear 9, and the air pressure in the space of the pump casing 1 is Under the action, the upper sealing plate 7 is tightly attached to the discharge channel 14, and then the position of the upper arc-shaped rack 10 is fixed, that is, the gear 9 meshing with the upper arc-shaped rack 10 cannot rotate, and then the other lower arc-shaped rack 12 meshing with the gear 9 drives the lower sealing plate 8 to fit the discharge channel 14, so as to achieve secondary blocking, and conversely, the lower arc-shaped rack 12 is rotated by dragging the lower sealing plate 8, and then the meshing gear 9 drives the upper arc-shaped rack 10 to move, that is, the upper sealing plate 7 is rotated to open, and the liquid in the pump housing 1 is discharged through the discharge channel 14;

[0025] Further discussion: A connecting hole 16 is provided on one side of the inner wall of the discharge channel 14, and a connecting column 6 is slidably connected in the connecting hole 16. One end of the connecting column 6 extends to one side of the lower sealing plate 8 and is plugged into one side of the lower sealing plate 8. The connecting column 6 extends to one side of the lower sealing plate 8 in a columnar T-shape, and the bottom surface of the lower sealing plate 8 is fixedly connected to a slide rail 17 which is plugged into the end surface of the connecting column 6. Specifically, the connecting hole 16 is located on one side of the connection between the lower sealing plate 8 and the discharge channel 14. Therefore, when the liquid in the pump casing 1 is discharged, the liquid flows through the inclined surface of the lower sealing plate 8 and will not enter the connecting hole 16. Moreover, the connecting column 6 in the connecting hole 16 is moved, and then one end of the connecting column 6 drags the slide rail 17 to swing, so that the lower sealing plate 8 can be swung by the extension and retraction of the connecting column 6, thereby realizing the opening or closing of the lower sealing plate 8.

[0026] Further discussion: A sealing bolt 3 is threadedly connected to the bottom position of the drainage channel 14, and a protrusion 11 for fixing the lower sealing plate 8 is fixedly connected to the end of the sealing bolt 3. After the drainage channel 14 is doubly sealed by the upper sealing plate 7 and the lower sealing plate 8, the position of the connecting column 6 can be fixed by rotating the sealing bolt 3 until the protrusion 11 on the end face abuts against the surface of the connecting column 6.

[0027] Further discussion: An adjustment channel 15 connected to the connecting hole 16 is provided at the bottom of the outer wall end surface of the pump housing 1, and a slider 13 is slidably connected in the adjustment channel 15. One side of the slider 13 is set as an inclined surface and provided with a guide groove 4. The other end of the connecting column 6 is fixedly connected to a connecting block 5 slidably connected to the inner wall of the guide groove 4. An adjustment bolt 2 rotatably connected to the side of the slider 13 is also threadedly connected in the adjustment channel 15. The cross-section of the adjustment channel 15 matching the slider 13 is rectangular, and the cross-section of the adjustment bolt 2 matching the adjustment bolt 2 is an internal threaded hole. The cross-section of the drainage channel 14 located at the upper sealing plate 7 and the lower sealing plate 8 is rectangular. As shown in the figure, the adjustment channel 15 and the drainage channel 1 4 is divided into a cylindrical part and a rectangular part, which ensures that the slider 13, the upper sealing plate 7 and the lower sealing plate 8 slide smoothly, and the adjusting bolt 2 and the plugging bolt 3 can rotate smoothly. When in use, by rotating the adjusting bolt 2, the sliding block 13 connected in rotation can slide in the adjusting channel 15, and the guide groove 4 at its inclined surface can be used to slide the other end of the connecting column 6 in the guide groove 4 and change its height. Therefore, by sliding the slider 13, the connecting column 6 can be extended and retracted in the connecting hole 16, and the lower sealing plate 8 can be swung. Because the adjusting bolt 2 is located on the side and the discharge channel 14 is located on the bottom, when the adjusting bolt 2 is rotated, the liquid sprayed from the pump housing 1 can be prevented from landing on the operator's hands.

[0028] Working principle: when it is necessary to discharge excess liquid in the pump casing 1, first rotate and remove the sealing bolt 3, and then rotate the adjusting bolt 2 to enable the slider 13 to slide. When the slider 13 slides, the other end of the connecting column 6 slides along the inner wall of the guide groove 4, and the height gradually decreases, so the connecting column 6 will slide down in the connecting hole 16, and then one end of the connecting column 6 will pull the lower sealing plate 8 to rotate, and the lower arc-shaped rack 12 will rotate, and then the meshing gear 9 will drive the upper arc-shaped rack 10 to move, that is, the upper sealing plate 7 will be rotated open, and the liquid in the pump casing 1 will be discharged through the drainage channel 14.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pump casing of a chemical centrifugal pump, comprising a pump casing (1), a drainage channel (14) provided on the bottom surface of the pump casing (1), and an upper sealing plate (7) in the drainage channel (14), characterized in that: The drainage channel (14) is also rotatably connected with a lower sealing plate (8) and a gear (9) located between the upper sealing plate (7) and the lower sealing plate (8); the hinged edges of the upper sealing plate (7) and the lower sealing plate (8) are located on the same side, and the upper arc-shaped rack (10) and the lower arc-shaped rack (12) are rotatably connected to the opposite surfaces of the upper sealing plate (7) and the lower sealing plate (8); the upper arc-shaped rack (10) and the lower arc-shaped rack (12) are staggered and distributed, and are both meshed with the tooth surface of the gear (9); a connecting hole (16) is opened on one side of the inner wall of the drainage channel (14); a connecting column (6) is slidably connected in the connecting hole (16); one end of the connecting column (6) extends to one side of the lower sealing plate (8) and is plugged into one side of the lower sealing plate (8).

2. The pump casing of a chemical centrifugal pump according to claim 1, characterized in that: The connecting column (6) extends to one side of the lower sealing plate (8) in a columnar T-shaped arrangement, and the bottom surface of the lower sealing plate (8) is fixedly connected to a slide rail (17) plugged into the end surface of the connecting column (6).

3. The pump casing of a chemical centrifugal pump according to claim 1, characterized in that: A blocking bolt (3) is threadedly connected to the bottom of the drainage channel (14), and a protrusion (11) for fixing the lower sealing plate (8) is fixedly connected to the end of the blocking bolt (3).

4. The pump casing of a chemical centrifugal pump according to claim 1, characterized in that: An adjustment channel (15) communicating with the connection hole (16) is provided at the bottom of the outer wall end surface of the pump housing (1), a slider (13) is slidably connected in the adjustment channel (15), one side of the slider (13) is provided with an inclined surface and a guide groove (4), and the other end of the connection column (6) is fixedly connected to a connection block (5) slidably connected to the inner wall of the guide groove (4).

5. The pump casing of a chemical centrifugal pump according to claim 4, characterized in that: The adjusting channel (15) is also threadedly connected with an adjusting bolt (2) which is rotatably connected to the side of the slider (13).

6. The pump casing of a chemical centrifugal pump according to claim 5, characterized in that: The cross section of the portion where the adjusting channel (15) cooperates with the slider (13) is rectangular, and the portion where the adjusting channel (15) cooperates with the adjusting bolt (2) is in the shape of an internal threaded hole.

7. The pump casing of a chemical centrifugal pump according to claim 1, characterized in that: The cross-sections of the liquid discharge channel (14) located on the upper sealing plate (7) and the lower sealing plate (8) are both rectangular.

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