A high-efficiency circulating cooling device for a centrifugal pump mechanical seal

Abstract

The utility model discloses a kind of high-efficiency circulating cooling devices for centrifugal pump mechanical seal, including closed ring, double-channel cooling mechanism, loop switching mechanism and locking mechanism, closed ring is sleeved in the mechanical sealing place of centrifugal pump, double-channel cooling mechanism includes mounting plate, short cooling box and long cooling box, short cooling box and long cooling box are installed on the side wall of one side of mounting plate, first return pump and second return pump are installed on the side wall of other side of mounting plate, first return pump and second return pump are communicated with short cooling box and long cooling box respectively, loop switching mechanism includes switching pipe, first pipeline and second pipeline, the end of switching pipe is connected with inflow pipe, first outlet and second outlet are arranged on the side wall of switching pipe.The utility model is cooled by closed ring to the mechanical mechanical sealing place of centrifugal pump, docking closed ring and double-channel cooling mechanism by locking mechanism, it is convenient to be fixed unlocking, can be repeatedly used, and the working stability of device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump mechanical seal circulating cooling technology, and in particular to a high-efficiency circulating cooling device for centrifugal pump mechanical seals. Background Technology

[0002] A centrifugal pump mechanical seal is a device used to prevent fluid leakage within the pump and is widely used in centrifugal pumps. It achieves a sealing effect through the tight contact between two precision sealing surfaces: a stationary ring and a rotating ring. During operation, the mechanical seal achieves sealing through the relative rotational motion between the stationary and rotating rings. An elastic element provides axial force, ensuring the two sealing surfaces are tightly fitted to prevent fluid leakage. The liquid film between the sealing surfaces provides lubrication and cooling, reducing friction and wear. However, for normal operation, the lubricating fluid needs to be cooled. Existing cooling devices for centrifugal pump mechanical seals can generally meet daily usage requirements, but the coolant circulation structure is simple and cannot adjust the device's output power according to the actual operating conditions of the centrifugal pump, increasing the device's energy consumption. Furthermore, the pipes connecting the coolant are mostly fixed with interference fits, making them prone to loosening or detachment under external forces, thus affecting the device's operational stability. Therefore, designing a high-efficiency circulating cooling device for centrifugal pump mechanical seals is essential. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency circulating cooling device for the mechanical seal of a centrifugal pump, in order to overcome the existing defects.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-efficiency circulating cooling device for a centrifugal pump mechanical seal, comprising a closed ring, a dual-channel cooling mechanism, a circuit switching mechanism, and a locking mechanism. The closed ring is fitted onto the mechanical seal of the centrifugal pump, and two coolant inlets and outlets are respectively provided on the closed ring. The dual-channel cooling mechanism includes a mounting plate, a short cooling tank, and a long cooling tank. The short cooling tank and the long cooling tank are mounted on one side wall of the mounting plate, and a first reflux pump and a second reflux pump are mounted on the other side wall of the mounting plate. The first reflux pump and the second reflux pump are respectively connected to the short cooling tank and the long cooling tank.

[0005] The circuit switching mechanism includes a switching pipe, a first pipe, and a second pipe. An inflow pipe is connected to one end of the switching pipe, and a first outlet and a second outlet are formed on the side wall of the switching pipe. One end of the first pipe is inserted into the first outlet, and the other end is connected to the input end of the first reflux pump. One end of the second pipe is inserted into the second outlet, and the other end is connected to the input end of the second reflux pump.

[0006] Both the short and long cooling boxes are connected to a return pipe via pipelines. Both the return pipe and the inflow pipe are connected to the closed ring via a locking mechanism, and both are respectively connected to the two coolant inlets and outlets of the closed ring.

[0007] Furthermore, both the short cooling box and the long cooling box are equipped with cooling plates.

[0008] Furthermore, the switching tube is provided with a switching component, which includes a switching frame, a closed shell, and a switching motor. The closed shell and the switching frame are sequentially sleeved on the outside of the output shaft of the switching motor. The switching motor drives the switching frame to rotate inside the switching tube and is used to adjust the rotation angle of the switching frame.

[0009] Furthermore, there are two locking mechanisms symmetrically arranged above and below the closed ring. Each locking mechanism includes a plug-in block, an inner support, an outer support, a pressing block, a return spring, a locking frame, a locking groove, and a sealing gasket. The inner support is located on the outer wall of the closed ring, and the outer support covers the outer side of the inner support. Both sides of the outer support have through grooves for the pressing block to pass through. The plug-in block passes through the outer support and connects with the inner support. The top of the plug-in block has either the inflow pipe or the return pipe inserted through it. Locking grooves are symmetrically arranged on both sides of the plug-in block.

[0010] The inner support is provided with fixed plates on both sides. There are two locking frames, which are connected to the two fixed plates by return springs. Each pressing block passes through the through groove and the corresponding fixed plate and then abuts or separates from the locking frame. Pressing or pulling out the pressing block can drive the locking frame's hook to unlock or lock with the corresponding locking groove. The sealing gasket is provided at the connection between the inner support and the plug block.

[0011] This utility model provides a high-efficiency circulating cooling device that provides working space for the cooling liquid through a closed ring. It is installed at the mechanical seal of a centrifugal pump for cooling. The locking mechanism connects to the closed ring and the dual-channel cooling mechanism. The locking mechanism is fixed by the elastic force of a return spring pressing the hook at one end of the locking frame into the locking grooves on both sides of the plug block. During disassembly, pressing the pressing block causes the locking frame to flip, simultaneously compressing the return spring and disengaging the hook at one end of the locking frame from the plug block. This design allows for convenient fixing and unlocking, is reusable, and prevents the plug block from loosening or falling off due to external force, ensuring the stability of the device. The entire cooling circuit consists of a short cooling box and a long cooling box, working in conjunction with… The loop switching mechanism can switch the loops. When the centrifugal pump is in a low-power state, the cooling requirement is low. At this time, the switching motor in the loop switching mechanism drives the switching frame to rotate, so that the inflow pipe and the first pipe are connected. At this time, the coolant is discharged into the short cooling box by the low-power first return pump, reducing the energy consumption of the device under low-power operation of the centrifugal pump. When the cooling requirement is high, the switching motor in the loop switching mechanism drives the switching frame to rotate, so that the inflow pipe and the second pipe are connected. The high-power second return pump discharges the coolant into the long cooling box, where it is cooled efficiently by the long-distance cooling plates, ensuring the cooling efficiency of the centrifugal pump under high-power operation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0014] Figure 2 This is an exploded view of the overall structure of this utility model;

[0015] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0016] Figure 4 for Figure 2 A magnified view of a portion of region B in the middle;

[0017] Figure 5 for Figure 2 A magnified view of a portion of region C.

[0018] In the diagram: 1. Closed loop; 2. Dual-channel cooling mechanism; 4. Circuit switching mechanism; 5. Inflow pipe; 6. Locking mechanism; 20. Mounting plate; 21. Short cooling box; 22. Long cooling box; 23. First reflux pump; 24. Second reflux pump; 25. Cooling plate; 26. Reflux pipe; 41. First pipe; 42. Second pipe; 43. Switching pipe; 44. First outlet; 45. Second outlet; 46. Switching frame; 47. Enclosed shell; 48. Switching motor; 61. Plug-in block; 62. Inner support; 63. Outer support; 64. Pressing block; 65. Return spring; 66. Locking frame; 67. Locking groove; 68. Sealing gasket. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Please see the appendix Figure 1 -Appendix Figure 5 The present invention provides an embodiment of the following technical solution: a high-efficiency circulating cooling device for a centrifugal pump mechanical seal, comprising a closed ring 1, a dual-channel cooling mechanism 2, a circuit switching mechanism 4, and a locking mechanism 6. The closed ring 1 is fitted onto the mechanical seal of the centrifugal pump, and has two coolant inlets and outlets respectively. Several coolant buffer tanks are formed on the inner wall of the closed ring 1. The dual-channel cooling mechanism 2 includes a mounting plate 20, a short cooling box 21, and a long cooling box 22. The short cooling box 21 and the long cooling box 22 are mounted on one side wall of the mounting plate 20. A first reflux pump 23 and a second reflux pump 24 are mounted on the other side wall of the mounting plate 20. The first reflux pump 23 and the second reflux pump 24 are respectively connected to the short cooling box 21 and the long cooling box 22.

[0021] The loop switching mechanism 4 includes a switching pipe 43, a first pipe 41, and a second pipe 42. An inflow pipe 5 is connected to the end of the switching pipe 43. A first outlet 44 and a second outlet 45 are provided on the side wall of the switching pipe 43. One end of the first pipe 41 is inserted into the first outlet 44, and the other end is connected to the input end of the first return pump 23. One end of the second pipe 42 is inserted into the second outlet 45, and the other end is connected to the input end of the second return pump 24.

[0022] Both the short cooling box 21 and the long cooling box 22 are connected to the return pipe 26 via pipes. The return pipe 26 and the inflow pipe 5 are both connected to the closed ring 1 via the locking mechanism 6, and both are connected to the two coolant inlets and outlets of the closed ring 1 respectively.

[0023] Both the short cooling box 21 and the long cooling box 22 are equipped with cooling plates 25.

[0024] The switching tube 43 is equipped with a switching component, which includes a switching frame 46, a closed shell 47, and a switching motor 48. The closed shell 47 and the switching frame 46 are sequentially sleeved on the outside of the output shaft of the switching motor 48. The switching motor 48 drives the switching frame 46 to rotate inside the switching tube 43 and is used to adjust the rotation angle of the switching frame 46.

[0025] There are two locking mechanisms 6, symmetrically arranged above and below the closed ring 1. Each locking mechanism 6 includes a plug-in block 61, an inner support 62, an outer support 63, a pressing block 64, a return spring 65, a locking frame 66, a locking groove 67, and a sealing gasket 68. The inner support 62 is located on the outer wall of the closed ring 1, and the outer support 63 covers the outer side of the inner support 62. Both sides of the outer support 63 have through grooves for the pressing block 64 to pass through. The plug-in block 61 passes through the outer support 63 and connects with the inner support 62. An inflow pipe 5 or a return pipe 26 passes through the top of the plug-in block 61. Locking grooves 67 are symmetrically arranged on both sides of the plug-in block 61.

[0026] The inner support 62 has fixing plates on both sides, which are fixed to the inner walls of the outer support 63. Two locking frames 66 are connected to the two fixing plates via return springs 65. Each pressing block 64 passes through the through groove and the fixing plate and then abuts against or separates from the locking frame 66. Pressing or pulling out the pressing block 64 causes the hook of the locking frame 66 to unlock or lock with the corresponding locking groove 67. A sealing gasket 68 is provided at the connection between the inner support 62 and the insertion block 61. Each pressing block 64 is slidably connected to the outer support. When the pressing block 64 is pressed in the through slot on 63, the return spring 65 is forced open, pushing the locking frame 66 to move towards the inner support 62. The lower part of the locking frame 66 is blocked by the inner support 62, causing the upper part of the locking frame 66 to flip, so that the hook at the lower part of the locking frame 66 moves away from the locking groove 67, thereby unlocking the fixation of the outer support 63 and the inner support 62. When fixing, the pressing block 64 is pulled out, the return spring 65 returns to its original position, and drives the upper part of the locking frame 66 to flip back towards the fixing plate, so that the hook at the lower part of the locking frame 66 engages in the locking groove 67, thereby locking the outer support 63 and the inner support 62 together.

[0027] Specifically, in use, the closed ring 1 provides space for the cooling liquid to work. Installed at the mechanical seal of the centrifugal pump, the locking mechanism 6 connects to the closed ring 1 and the dual-channel cooling mechanism 2. The locking hook at one end of the locking frame 66 is pressed tightly into the locking grooves 67 on both sides of the plug-in block 61 by the elastic force of the return spring 65, thus achieving fixation. During disassembly, pressing the pressing block 64 causes the locking frame 66 to flip, simultaneously compressing the return spring 65 and disengaging the hook at one end of the locking frame 66 from the plug-in block 61. Fixing and unlocking are convenient, allowing for repeated use. This also prevents the plug-in block 61 from loosening or falling off due to external force, ensuring the stability of the device. The entire cooling circuit consists of a short cooling box 21 and a long cooling box 22. With the circuit switching mechanism 4, the circuit can be switched. When the centrifugal pump is in a low-power state with low cooling requirements, the switching motor 48 in the circuit switching mechanism 4 drives the switching frame 46 to rotate, adjusting the switching frame 46. The rotation angle connects the inflow pipe 5 with the first pipe 41. At this time, the low-power first return pump 23 discharges the coolant into the short cooling tank 21. The cooled coolant then flows through the inflow pipe 5 and / or return pipe 26 to the coolant inlet and outlet of the closed ring 1 to cool the mechanical seal of the centrifugal pump, reducing the energy consumption of the device under low-power operation of the centrifugal pump. When the cooling requirement is high, the switching motor 48 in the circuit switching mechanism 4 drives the switching frame 46 to rotate. The rotation angle of the switching frame 46 is adjusted to connect the inflow pipe 5 with the second pipe 42. The high-power second return pump 24 discharges the coolant into the long cooling tank 22 for high-efficiency cooling through the long-distance cooling plate 25 in the long cooling tank 22. The cooled coolant then flows through the inflow pipe 5 and / or return pipe 26 to the coolant inlet and outlet of the closed ring 1 to cool the mechanical seal of the centrifugal pump, ensuring the cooling efficiency of the centrifugal pump under high-power operation.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-efficiency circulating cooling device for a centrifugal pump mechanical seal, characterized in that: The system includes a closed ring (1), a dual-channel cooling mechanism (2), a loop switching mechanism (4), and a locking mechanism (6). The closed ring (1) is fitted onto the mechanical seal of the centrifugal pump. Two coolant inlets and outlets are respectively opened on the closed ring (1). The dual-channel cooling mechanism (2) includes a mounting plate (20), a short cooling box (21), and a long cooling box (22). The short cooling box (21) and the long cooling box (22) are installed on one side wall of the mounting plate (20). A first reflux pump (23) and a second reflux pump (24) are installed on the other side wall of the mounting plate (20). The first reflux pump (23) and the second reflux pump (24) are respectively connected to the short cooling box (21) and the long cooling box (22). The circuit switching mechanism (4) includes a switching pipe (43), a first pipe (41), and a second pipe (42). The end of the switching pipe (43) is connected to an inflow pipe (5). The side wall of the switching pipe (43) is provided with a first outlet (44) and a second outlet (45). One end of the first pipe (41) is inserted into the first outlet (44), and the other end is connected to the input end of the first return pump (23). One end of the second pipe (42) is inserted into the second outlet (45), and the other end is connected to the input end of the second return pump (24). Both the short cooling box (21) and the long cooling box (22) are connected to the return pipe (26) through pipes. The return pipe (26) and the inflow pipe (5) are both connected to the closed ring (1) through the locking mechanism (6), and both are connected to the two coolant inlets and outlets of the closed ring (1) respectively.

2. The high-efficiency circulating cooling device for a centrifugal pump mechanical seal according to claim 1, characterized in that: Both the short cooling box (21) and the long cooling box (22) are equipped with cooling plates (25).

3. The high-efficiency circulating cooling device for a centrifugal pump mechanical seal according to claim 1, characterized in that: The switching tube (43) is provided with a switching component, which includes a switching frame (46), a closed shell (47), and a switching motor (48). The closed shell (47) and the switching frame (46) are sequentially sleeved on the outside of the output shaft of the switching motor (48). The switching motor (48) drives the switching frame (46) to rotate inside the switching tube (43) and is used to adjust the rotation angle of the switching frame (46).

4. The high-efficiency circulating cooling device for a centrifugal pump mechanical seal according to claim 1, characterized in that: The locking mechanism (6) consists of two parts, which are symmetrically arranged above and below the closed ring (1). Each locking mechanism (6) includes a plug-in block (61), an inner support (62), an outer support (63), a pressing block (64), a return spring (65), a locking frame (66), a locking groove (67), and a sealing gasket (68). The inner support (62) is located on the outer wall of the closed ring (1), and the outer support (63) covers the outer side of the inner support (62). The outer support (63) has through grooves on both sides for the pressing block (64) to pass through. The plug-in block (61) passes through the outer support (63) and connects with the inner support (62). The top of the plug-in block (61) is provided with the inflow pipe (5) or the return pipe (26). The plug-in block (61) has locking grooves (67) symmetrically arranged on both sides. The inner support (62) is provided with fixed plates on both sides. There are two locking frames (66) and they are connected to the two fixed plates respectively through a return spring (65). Each pressing block (64) passes through the through groove and the corresponding fixed plate and then abuts or separates from the locking frame (66). Pressing or pulling out the pressing block (64) will drive the hook of the locking frame (66) to unlock or lock with the corresponding locking groove (67). The sealing gasket (68) is provided at the connection between the inner support (62) and the plug block (61).

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