An adjustable high-temperature centrifugal pump seal cooling device

Abstract

The present application relates to the technical field of centrifugal pump seal cooling, and provides an adjustable high-temperature centrifugal pump seal cooling device, including a mounting platform, a cooling module and a filtering module. The mounting platform is provided with a mounting frame, the mounting platform is provided with a centrifugal pump body, the centrifugal pump body is provided with a seal mounting cavity, the seal mounting cavity is provided with a seal assembly, the surface of the seal assembly is provided with a spiral liquid guide groove, and a coolant cylinder is fixedly installed on the mounting frame; the present application provides a spiral liquid guide groove on the surface of the seal assembly, and the seal assembly and the seal mounting cavity wall are designed to be narrow, so that the coolant entering through the liquid inlet is driven by the output end of the external drive motor, and the coolant is transported by the spiral liquid guide groove to wash the end face of the seal assembly and the sealing contact surface of the dynamic ring and the static ring, and the precipitated particles or solid particles in the conveying medium are washed off, so that the water film is maintained between the dynamic ring and the static ring, thereby ensuring the sealing effect of the seal assembly.

Description

Technical Field

[0001] The present application relates to the technical field of centrifugal pump seal cooling, and in particular to an adjustable high-temperature centrifugal pump seal cooling device. Background Art

[0002] A centrifugal pump is a pump that transports liquid by driving the liquid to generate centrifugal force through the rotation of the impeller. Before starting the pump, the pump casing and the suction pipe must be filled with liquid so that the impeller and the liquid can generate centrifugal motion through high-speed rotation after the motor is started. When a centrifugal pump transports high-temperature media, the high-temperature media will damage the sealing ring of the mechanical seal assembly, thereby affecting the sealing performance of the centrifugal pump. Therefore, when transporting high-temperature media, it is usually necessary to set a corresponding cooling device at the mechanical seal.

[0003] However, there are the following problems in the prior art:

[0004] 1. Existing cooling devices usually use an external liquid pump to introduce coolant into the mechanical seal to cool the mechanical seal and avoid leakage of the centrifugal pump. However, since the coolant is in a high temperature state for a long time, the mechanical seal may cause precipitation. The precipitation particles or solid particles in the conveying medium may enter the sealing surface between the dynamic ring and the static ring, making it difficult to form a water film between the dynamic ring and the static ring, thereby affecting the sealing effect of the mechanical seal.

[0005] 2. The precipitated particles in the coolant after cooling and heat exchange or the solid particles in the conveying medium cannot be effectively filtered out, and will re-enter the mechanical seal of the centrifugal pump with the circulation of the coolant, making it difficult to remove the solid particles.

[0006] Therefore, we designed an adjustable high-temperature centrifugal pump seal cooling device. Summary of the invention

[0007] An adjustable high-temperature centrifugal pump seal cooling device provided in an embodiment of the present application can cool the seal of a centrifugal pump, flush the end face of the seal assembly by means of a seal installation cavity and a narrow installation space of the seal assembly, and filter out solid particles after flushing.

[0008] The embodiment of the present application provides an adjustable high-temperature centrifugal pump seal cooling device, comprising: a mounting platform, a cooling module and a filter module, the mounting platform is provided with a mounting frame, the mounting platform is provided with a centrifugal pump body, the centrifugal pump body is provided with a seal installation cavity, the seal installation cavity is provided with a seal assembly, the surface of the seal assembly is provided with a spiral liquid guide groove, the centrifugal pump body is provided with a connecting shaft, the connecting shaft is coaxially fixedly connected with the seal assembly, a coolant cylinder is fixedly installed on the mounting frame, and a coolant inlet and a coolant outlet are respectively provided at the bottom of the coolant cylinder;

[0009] The cooling module is arranged between the coolant cylinder and the centrifugal pump body, and is used to cool the mechanical seal assembly and flush the solid particles on the mechanical seal installation cavity or the mechanical seal assembly;

[0010] The filter module is arranged on the cooling module, and is used to filter the solid particles contained in the cooling liquid after flushing and heat exchange;

[0011] In this embodiment, the mechanical seal assembly includes: multiple sealing rings, a spring mounting seat, a group of static rings, a group of dynamic rings, a group of push rings and multiple connecting springs, a group of push rings and multiple connecting springs are symmetrically arranged on both sides of the spring mounting seat, and one end of the multiple connecting springs is fixedly connected to the spring mounting seat, and the other end is fixedly connected to the push ring; the dynamic ring is arranged at one end of the push ring away from the spring mounting seat, and the static ring is arranged at one end of the dynamic ring away from the push ring.

[0012] In this embodiment, a liquid inlet and a liquid outlet are respectively provided on the centrifugal pump body, and both the liquid inlet and the liquid outlet are communicated with the mechanical seal installation cavity.

[0013] In this embodiment, the cooling module comprises: a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are respectively connected to the coolant cylinder, and the ends of the liquid inlet pipe and the liquid outlet pipe away from the coolant cylinder are respectively connected to the liquid inlet and the liquid outlet;

[0014] A coolant tank and an external water pump are provided on the mounting platform. The external water pump is connected to the coolant tank, one end of the external water pump away from the coolant tank is connected to the coolant inlet, and one end of the coolant outlet away from the coolant cylinder is connected to the coolant tank.

[0015] In this embodiment, annular grooves are provided at one end of the mechanical seal assembly close to the liquid inlet and the end close to the liquid outlet, the spiral liquid guiding groove is arranged between a group of annular grooves, and both ends of the spiral liquid guiding groove are connected to the annular grooves.

[0016] In this embodiment, the filtering module includes:

[0017] An outer sleeve, a filter screen, a connecting pipe, a valve and a collecting cylinder, wherein the outer sleeve is coaxially arranged on the liquid inlet pipe, and the liquid inlet pipe is connected with the outer sleeve, the outer sleeve is arranged in a convex shape, the filter screen is obliquely arranged in the outer sleeve, the connecting pipe is connected with the outer sleeve and is arranged vertically, and the valve is arranged on the connecting pipe;

[0018] An end of the connecting pipe away from the outer sleeve is provided with an external connection thread, and an internal connection thread matched with the external connection thread is provided on the inner wall of the collecting cylinder.

[0019] In this embodiment, a liquid level indicator and a liquid level switch are provided on the side wall of the coolant cylinder, an oil drain pipe is provided at the bottom of the coolant cylinder, an oil drain valve is provided on the oil drain pipe, an exhaust pipe is provided at the top of the coolant cylinder, and a pressure indicator is provided on the exhaust pipe.

[0020] In this embodiment, an external drive motor is fixedly mounted on the mounting platform, and an output end of the external drive motor is coaxially and fixedly connected to the connecting shaft.

[0021] In this embodiment, a group of mounting brackets are provided at the bottom of the centrifugal pump body, and the centrifugal pump body is fixedly mounted on the mounting platform by a group of mounting brackets and mounting bolts.

[0022] In this embodiment, a plurality of reinforcing ribs are provided between the mounting frame and the mounting platform.

[0023] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0024] 1. In the present application, a spiral liquid guide groove is provided on the surface of the mechanical seal assembly, and the walls of the mechanical seal assembly and the mechanical seal installation cavity are designed to be narrow. Driven by the output end of the external drive motor, the mechanical seal assembly rotates accordingly, so that the coolant entering through the liquid inlet is conveyed by the spiral liquid guide groove to flush the end face of the mechanical seal assembly and the sealing contact surface between the dynamic ring and the static ring, and the generated precipitated particles or solid particles in the conveying medium are washed off, so that a water film is maintained between the dynamic ring and the static ring, thereby ensuring the sealing effect of the mechanical seal assembly.

[0025] 2. The present application squeezes the push rings on both sides with the coolant at the spring mounting seat, so that the dynamic ring and the static ring are in closer contact. At the same time, the pressure of the coolant entering the mechanical seal installation cavity is higher than the pressure of the high-temperature medium. In the process of cooling the mechanical seal assembly, the pressure difference is used to prevent the high-temperature medium from leaking through the mechanical seal assembly, thereby effectively reducing the wear and leakage of the mechanical seal assembly, extending the service life of the centrifugal pump, and improving the reliability and safety of the centrifugal pump.

[0026] 3. In this application, the precipitated particles or solid particles in the conveying medium are filtered out after being filtered through the filter. When there are many precipitated particles or solid particles in the conveying medium in the collecting tube, the valve is closed and the collecting tube is removed from the bottom of the connecting pipe to collect the precipitated particles in the coolant that has been flushed and heat exchanged or the solid particles in the conveying medium, so as to prevent the precipitated particles or solid particles in the conveying medium from entering the mechanical seal assembly of the centrifugal pump again with the circulation of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 A schematic diagram of the overall structure of an adjustable high-temperature centrifugal pump seal cooling device provided in an embodiment of the present application;

[0029] Figure 2 A front view of an adjustable high-temperature centrifugal pump seal cooling device provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the internal structure of a centrifugal pump body of an adjustable high-temperature centrifugal pump seal cooling device provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of a mechanical seal assembly of an adjustable high-temperature centrifugal pump mechanical seal cooling device provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the internal structure of a mechanical seal assembly of an adjustable high-temperature centrifugal pump mechanical seal cooling device provided in an embodiment of the present application;

[0033] Figure 6 for Figure 1 A magnified schematic diagram of the middle part;

[0034] Figure 7 A schematic diagram of a filter module of an adjustable high-temperature centrifugal pump seal cooling device provided in an embodiment of the present application.

[0035] Among them, the reference numerals in the figure are:

[0036] 1. Mounting table; 11. Mounting frame;

[0037] 2. Centrifugal pump body; 21. Mounting bracket; 22. Connecting shaft; 23. Liquid inlet; 24. Liquid outlet; 25. Mechanical seal installation cavity; 26. Mechanical seal assembly; 261. Spiral liquid guide groove; 262. Sealing ring; 263. Spring mounting seat; 264. Stationary ring; 265. Moving ring; 266. Push ring; 267. Connecting spring;

[0038] 3. Coolant cylinder; 31. Coolant inlet; 311. Liquid inlet pipe; 32. Coolant outlet; 321. Liquid outlet pipe; 33. Liquid level indicator; 34. Liquid level switch; 35. Oil drain valve; 36. Pressure indicator;

[0039] 4. Outer sleeve; 41. Filter screen; 42. Connecting pipe; 421. External connecting thread; 43. Valve; 44. Collecting tube. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] See also Figures 1 to 7 The embodiment of the present application provides an adjustable high-temperature centrifugal pump seal cooling device, including: a mounting platform 1, a cooling module and a filtering module, the mounting platform 1 is provided with a mounting frame 11, the mounting platform 1 is provided with a centrifugal pump body 2, the centrifugal pump body 2 is provided with a seal installation cavity 25, the seal installation cavity 25 is provided with a seal assembly 26, the surface of the seal assembly 26 is provided with a spiral liquid guide groove 261, the centrifugal pump body 2 is provided with a connecting shaft 22, the connecting shaft 22 is coaxially fixedly connected with the seal assembly 26, a coolant cylinder 3 is fixedly installed on the mounting frame 11, and a coolant inlet 31 and a coolant outlet 32 ​​are respectively provided at the bottom of the coolant cylinder 3;

[0042] A plurality of reinforcing ribs are provided between the mounting frame 11 and the mounting platform 1. A group of mounting brackets 21 are provided at the bottom of the centrifugal pump body 2. The centrifugal pump body 2 is fixedly mounted on the mounting platform 1 through a group of mounting brackets 21 and mounting bolts. An external drive motor is fixedly mounted on the mounting platform 1. The output end of the external drive motor is coaxially fixedly connected with the connecting shaft 22.

[0043] The effect of such arrangement is that the centrifugal pump body 2 is fixedly mounted on the mounting platform 1 through the mounting bracket 21, and then the output end of the external drive motor is coaxially fixedly connected with the connecting shaft 22, and the coolant in the coolant tank is transported to the coolant cylinder 3 through the coolant inlet 31 through the external liquid pump, and the coolant entering the coolant cylinder 3 enters the mechanical seal mounting cavity 25;

[0044] A spiral liquid guide groove 261 is provided on the surface of the mechanical seal component 26, and the walls of the mechanical seal component 26 and the mechanical seal installation cavity 25 are designed to be narrow. Driven by the output end of the external drive motor, the mechanical seal component 26 rotates accordingly, so that the coolant entering through the liquid inlet 23 is transported by the spiral liquid guide groove 261 to flush the end face of the mechanical seal component 26 and the sealing contact surfaces of the dynamic ring 265 and the static ring 264.

[0045] See also Figures 3 to 5The mechanical seal assembly 26 includes: a plurality of sealing rings 262, a spring mounting seat 263, a group of static rings 264, a group of dynamic rings 265, a group of push rings 266 and a plurality of connecting springs 267, a group of push rings 266 and a plurality of connecting springs 267 are symmetrically arranged on both sides of the spring mounting seat 263, and one end of the plurality of connecting springs 267 is fixedly connected to the spring mounting seat 263, and the other end is fixedly connected to the push ring 266; the dynamic ring 265 is arranged at one end of the push ring 266 away from the spring mounting seat 263, and the static ring 264 is arranged at one end of the dynamic ring 265 away from the push ring 266;

[0046] The mechanical seal assembly 26 is provided with an annular groove at one end close to the liquid inlet 23 and the end close to the liquid outlet 24. The spiral liquid guide groove 261 is arranged between a group of annular grooves, and both ends of the spiral liquid guide groove 261 are connected to the annular grooves.

[0047] The effect of such arrangement is that the coolant at the spring mounting seat 263 squeezes the push rings 266 on both sides, so that the dynamic ring 265 and the static ring 264 are in closer contact. At the same time, the pressure of the coolant entering the mechanical seal mounting cavity 25 is higher than the pressure of the high-temperature medium. In the process of cooling the mechanical seal assembly 26, the pressure difference is used to prevent the high-temperature medium from leaking through the mechanical seal assembly 26, and the water film on the sealing contact surface of the dynamic ring 265 and the static ring 264 is vaporized at high temperature, which effectively reduces the wear and leakage of the mechanical seal assembly 26, prolongs the service life of the centrifugal pump, and improves the reliability and safety of the centrifugal pump.

[0048] The walls of the mechanical seal assembly 26 and the mechanical seal installation cavity 25 are designed to be narrow. Driven by the output end of the external drive motor, the mechanical seal assembly 26 rotates accordingly, so that the coolant entering through the liquid inlet 23 is transported by the spiral liquid guide groove 261 to flush the end face of the mechanical seal assembly 26 and the sealing contact surfaces of the dynamic ring 265 and the static ring 264, thereby improving the sealing performance of the mechanical seal assembly 26.

[0049] See also Figures 1 to 3 The cooling module is arranged between the coolant cylinder 3 and the centrifugal pump body 2, and the cooling module is used to cool the mechanical seal assembly 26 and flush the solid particles on the mechanical seal installation cavity 25 or the mechanical seal assembly 26; the centrifugal pump body 2 is provided with a liquid inlet 23 and a liquid outlet 24, respectively, and the liquid inlet 23 and the liquid outlet 24 are both connected to the mechanical seal installation cavity 25; the cooling module includes: an inlet pipe 311 and a liquid outlet pipe 321, the inlet pipe 311 and the liquid outlet pipe 321 are respectively connected to the coolant cylinder 3, and the ends of the inlet pipe 311 and the liquid outlet pipe 321 away from the coolant cylinder 3 are respectively connected to the inlet 23 and the liquid outlet 24;

[0050] A coolant tank and an external water pump are provided on the mounting platform 1. The external water pump is connected to the coolant tank. One end of the external water pump away from the coolant tank is connected to the coolant inlet 31. The end of the coolant outlet 32 ​​away from the coolant cylinder 3 is connected to the coolant tank.

[0051] The effect of such a configuration is that, driven by the output end of the external drive motor, the mechanical seal assembly 26 rotates accordingly, so that the coolant entering through the liquid inlet 23 is conveyed by the spiral liquid guide groove 261 to flush the end face of the mechanical seal assembly 26 and the sealing contact surface between the dynamic ring 265 and the static ring 264, and the generated precipitated particles or solid particles in the conveying medium are washed off, so that a water film is formed between the dynamic ring 265 and the static ring 264, thereby ensuring the sealing effect of the mechanical seal assembly 26.

[0052] See also Figure 6 and Figure 7 , the filter module is arranged on the cooling module, and the filter module is used to filter the solid particles mixed in the coolant after flushing and heat exchange; the filter module includes: an outer sleeve 4, a filter screen 41, a connecting pipe 42, a valve 43 and a collecting cylinder 44, the outer sleeve 4 is coaxially arranged on the liquid inlet pipe 311, and the liquid inlet pipe 311 is connected with the outer sleeve 4, the outer sleeve 4 is arranged in a convex shape, the filter screen 41 is obliquely arranged in the outer sleeve 4, the connecting pipe 42 is connected with the outer sleeve 4, and is arranged vertically, and the valve 43 is arranged on the connecting pipe 42;

[0053] An end of the connecting pipe 42 away from the outer sleeve 4 is provided with an external connection thread 421, and an internal connection thread matching the external connection thread 421 is provided on the inner wall of the collecting tube 44;

[0054] The effect of such arrangement is that the cooling liquid after flushing and heat exchange enters the cooling liquid cylinder 3 through the liquid outlet 24 on the centrifugal pump body 2 and the liquid outlet pipe 321. Before entering the cooling liquid cylinder 3, the cooling liquid in the liquid outlet pipe 321 is filtered by the filter screen 41, and the precipitated particles or solid particles in the conveying medium are filtered out. Since the filter screen 41 is arranged obliquely in the outer sleeve 4, and the outer sleeve 4 is in a convex shape as a whole, the precipitated particles or solid particles in the conveying medium that are filtered out enter the connecting pipe 42 under the impact of the subsequent cooling liquid and the cooling liquid above the filter screen 41.

[0055] By providing a transparent observation frame on the collecting tube 44, when there are a large number of precipitated particles in the collecting tube 44 or solid particles in the conveying medium, the valve 43 is closed and the collecting tube 44 is removed from the bottom of the connecting pipe 42, so as to collect the precipitated particles in the coolant that has been flushed and heat exchanged or the solid particles in the conveying medium, and prevent the precipitated particles or the solid particles in the conveying medium from entering the mechanical seal assembly 26 of the centrifugal pump again with the circulation of the coolant.

[0056] See also Figure 1 and Figure 2 A liquid level indicator 33 and a liquid level switch 34 are provided on the side wall of the coolant cylinder 3, an oil drain pipe is provided at the bottom of the coolant cylinder 3, an oil drain valve 35 is provided on the oil drain pipe, an exhaust pipe is provided on the top of the coolant cylinder 3, and a pressure indicator 36 is provided on the exhaust pipe;

[0057] The effect of such arrangement is that a spiral tube is provided in the coolant cylinder 3, and the two ends of the spiral tube are respectively connected to the coolant inlet 31 and the liquid inlet pipe 311, and the liquid level in the coolant cylinder 3 is monitored by the liquid level indicator 33 and the pressure indicator 36. The coolant is provided to the mechanical seal installation chamber 25 in the coolant cylinder 3. During normal operation, the coolant circulation is maintained. When the steam in the coolant cylinder 3 gradually increases, the liquid level in the coolant cylinder 3 rises. When the liquid contacts the electrode, conductivity will occur, and the liquid level switch 34 will be turned on, thereby outputting an alarm signal, opening the exhaust pipe at the top of the coolant cylinder 3, continuously discharging steam and maintaining a pressure lower than that of the mechanical seal installation chamber 25, thereby ensuring the sealing of the centrifugal pump.

[0058] From the above, we can see that the working principle of this application is as follows:

[0059] The centrifugal pump body 2 is fixedly mounted on the mounting platform 1 through the mounting bracket 21, and then the output end of the external drive motor is coaxially fixedly connected with the connecting shaft 22, and the coolant in the coolant tank is transported to the coolant cylinder 3 through the coolant inlet 31 through the external liquid pump, and the coolant entering the coolant cylinder 3 enters the mechanical seal mounting cavity 25 through the liquid inlet pipe 311 connected to the liquid inlet 23 of the centrifugal pump body 2;

[0060] The surface of the mechanical seal component 26 is provided with a spiral liquid guide groove 261, and the walls of the mechanical seal component 26 and the mechanical seal installation cavity 25 are designed to be narrow. Driven by the output end of the external drive motor, the mechanical seal component 26 rotates accordingly, so that the coolant entering through the liquid inlet 23 is conveyed by the spiral liquid guide groove 261 to wash the end face of the mechanical seal component 26, the sealing contact surface of the dynamic ring 265 and the static ring 264, and the generated precipitation particles or solid particles in the conveying medium are washed down, so that a water film is formed between the dynamic ring 265 and the static ring 264;

[0061] At the same time, the coolant at the spring mounting seat 263 squeezes the push rings 266 on both sides, so that the dynamic ring 265 and the static ring 264 are in closer contact. At the same time, the pressure of the coolant entering the mechanical seal mounting cavity 25 is higher than the pressure of the high-temperature medium. In the process of cooling the mechanical seal assembly 26, the pressure difference is used to prevent the high-temperature medium from leaking through the mechanical seal assembly 26, and the water film on the sealing contact surface of the dynamic ring 265 and the static ring 264 from vaporizing at high temperature.

[0062] The cooling liquid after flushing and heat exchange enters the cooling liquid cylinder 3 through the liquid outlet 24 on the centrifugal pump body 2 and the liquid outlet pipe 321. Before entering the cooling liquid cylinder 3, the cooling liquid in the liquid outlet pipe 321 is filtered by the filter screen 41, and the precipitated particles or solid particles in the conveying medium are filtered out. Since the filter screen 41 is tiltedly arranged in the outer sleeve 4, and the outer sleeve 4 is in a convex shape as a whole, the precipitated particles or solid particles in the conveying medium that are filtered out enter the connecting pipe 42 under the impact of the subsequent cooling liquid and the cooling liquid above the filter screen 41. By setting a transparent observation frame on the collecting tube 44, when there are many precipitated particles or solid particles in the conveying medium in the collecting tube 44, the valve 43 is closed and the collecting tube 44 is removed from the bottom of the connecting pipe 42;

[0063] A spiral tube is provided in the coolant cylinder 3, and the two ends of the spiral tube are respectively connected to the coolant inlet 31 and the liquid inlet pipe 311, and the liquid level in the coolant cylinder 3 is monitored by the liquid level indicator 33 and the pressure indicator 36. The coolant is provided to the mechanical seal installation chamber 25 in the coolant cylinder 3. During normal operation, the coolant circulation is maintained. When the steam in the coolant cylinder 3 gradually increases, the liquid level in the coolant cylinder 3 rises. When the liquid contacts the electrode, conductivity will occur, and the liquid level switch 34 will be turned on, thereby outputting an alarm signal, opening the exhaust pipe at the top of the coolant cylinder 3, continuously discharging steam and maintaining a pressure lower than that of the mechanical seal installation chamber 25.

[0064] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An adjustable high-temperature centrifugal pump seal cooling device, It is characterized in that include: A mounting platform (1), a cooling module and a filter module, wherein a mounting frame (11) is provided on the mounting platform (1), a centrifugal pump body (2) is provided on the mounting platform (1), a machine seal mounting cavity (25) is provided in the centrifugal pump body (2), a machine seal assembly (26) is provided in the machine seal mounting cavity (25), a spiral liquid guide groove (261) is provided on the surface of the machine seal assembly (26), a connecting shaft (22) is provided on the centrifugal pump body (2), the connecting shaft (22) is coaxially fixedly connected to the machine seal assembly (26), a coolant cylinder (3) is fixedly installed on the mounting frame (11), and a coolant inlet (31) and a coolant outlet (32) are respectively provided at the bottom of the coolant cylinder (3); The cooling module is arranged between the coolant cylinder (3) and the centrifugal pump body (2), and is used to cool the mechanical seal assembly (26) and to flush solid particles on the mechanical seal installation cavity (25) or the mechanical seal assembly (26); The filter module is arranged on the cooling module, and is used to filter the solid particles contained in the cooling liquid after flushing and heat exchange; The mechanical seal assembly (26) comprises: a plurality of sealing rings (262), a spring mounting seat (263), a group of static rings (264), a group of dynamic rings (265), a group of push rings (266) and a plurality of connecting springs (267); the group of push rings (266) and the plurality of connecting springs (267) are symmetrically arranged on both sides of the spring mounting seat (263); one end of the plurality of connecting springs (267) is fixedly connected to the spring mounting seat (263), and the other end is fixedly connected to the push ring (266); the dynamic ring (265) is arranged at one end of the push ring (266) away from the spring mounting seat (263), and the static ring (264) is arranged at one end of the dynamic ring (265) away from the push ring (266); The centrifugal pump body (2) is provided with a liquid inlet (23) and a liquid outlet (24), respectively, and the liquid inlet (23) and the liquid outlet (24) are both in communication with the mechanical seal installation cavity (25); The mechanical seal assembly (26) is provided with an annular groove at one end close to the liquid inlet (23) and at one end close to the liquid outlet (24); the spiral liquid guide groove (261) is arranged between a group of annular grooves, and both ends of the spiral liquid guide groove (261) are connected to the annular grooves; The push ring (266) is provided with a spiral liquid guide groove (261), and the coolant at the spring mounting seat (263) squeezes the push rings (266) on both sides, so that the moving ring (265) and the stationary ring (264) are in closer contact; A liquid level indicator (33) and a liquid level switch (34) are provided on the side wall of the coolant cylinder (3); an oil drain pipe is provided at the bottom of the coolant cylinder (3); an oil drain valve (35) is provided on the oil drain pipe; an exhaust pipe is provided at the top of the coolant cylinder (3); and a pressure indicator (36) is provided on the exhaust pipe.

2. The adjustable high-temperature centrifugal pump seal cooling device according to claim 1, Features: The cooling module comprises: a liquid inlet pipe (311) and a liquid outlet pipe (321), wherein the liquid inlet pipe (311) and the liquid outlet pipe (321) are respectively connected to the cooling liquid cylinder (3), and ends of the liquid inlet pipe (311) and the liquid outlet pipe (321) away from the cooling liquid cylinder (3) are respectively connected to the liquid inlet port (23) and the liquid outlet port (24); A coolant tank and an external water pump are provided on the mounting platform (1); the external water pump is connected to the coolant tank; an end of the external water pump away from the coolant tank is connected to a coolant inlet (31); and an end of the coolant outlet (32) away from the coolant cylinder (3) is connected to the coolant tank.

3. The adjustable high-temperature centrifugal pump seal cooling device according to claim 2, Features: The filtering module comprises: An outer sleeve (4), a filter screen (41), a connecting pipe (42), a valve (43) and a collecting tube (44), wherein the outer sleeve (4) is coaxially arranged on the liquid inlet pipe (311), and the liquid inlet pipe (311) is connected to the outer sleeve (4), the outer sleeve (4) is arranged in a convex shape, the filter screen (41) is arranged obliquely in the outer sleeve (4), the connecting pipe (42) is connected to the outer sleeve (4) and is arranged vertically, and the valve (43) is arranged on the connecting pipe (42); An end of the connecting pipe (42) away from the outer sleeve (4) is provided with an external connection thread (421), and an inner wall of the collecting cylinder (44) is provided with an internal connection thread matching the external connection thread (421).

4. The adjustable high-temperature centrifugal pump seal cooling device according to claim 1, Features: An external drive motor is fixedly mounted on the mounting platform (1), and an output end of the external drive motor is coaxially fixedly connected to a connecting shaft (22).

5. The adjustable high-temperature centrifugal pump seal cooling device according to claim 1, Features: A set of mounting brackets (21) are provided at the bottom of the centrifugal pump body (2), and the centrifugal pump body (2) is fixedly mounted on the mounting platform (1) via the set of mounting brackets (21) and mounting bolts.

6. The adjustable high-temperature centrifugal pump seal cooling device according to claim 1, Features: A plurality of reinforcing ribs are provided between the mounting frame (11) and the mounting platform (1).

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