Horizontal water pump unit stern shaft sealing balance tank flow guide and sampling device

Abstract

This invention relates to the field of stern shaft seal technology for horizontal water pump units, and discloses a flow guiding and sampling device for the stern shaft seal balance chamber of a horizontal water pump unit. Installed on the impeller housing and stern shaft seal of the horizontal water pump, the device effectively solves the problem of oil leakage and water ingress leading to seal failure at the end of the stern shaft seal by establishing a balance chamber inside the stern shaft seal, thus ensuring the safe operation of the horizontal water pump unit. During use, the device utilizes a flow guiding mechanism to collect the leaked liquid inside the balance chamber and guide it into a collection mechanism, facilitating subsequent detection of the leaked liquid inside the collection mechanism to obtain leakage status information. The device includes: a balance chamber mechanism installed on the stern shaft seal; a flow guiding mechanism located below the stern shaft seal; a collection mechanism located at the output end of the flow guiding mechanism, below the stern shaft seal and outside the impeller housing of the water pump; and a constant pressure mechanism located between the stern shaft seal and the flow guiding mechanism.

Description

Technical Field

[0001] This invention relates to the field of stern shaft sealing technology for water pump units, specifically a flow guiding and sampling device for the stern shaft sealing balance chamber of a horizontal water pump unit. Background Technology

[0002] The stern shaft, also known as the tail shaft, is the last section of the shaft system. The flange at the front end is connected to the flange of the intermediate shaft with tight-fitting bolts, and the tail end is conical. The stern shaft is forged from high-quality carbon steel. For horizontal water pump units, the stern shaft seal is located inside the impeller housing. It is a shaft seal device installed on the guide bearing at the end of the pump shaft. It is used to seal the gap between the rotating shaft and the fixed bearing housing to prevent oil leakage from the bearing housing and water from the flow channel from entering the bearing housing.

[0003] In some stern shaft seal designs, a three-seal structure is employed, including an inner oil seal and two outer water seals. The oil seal lips face inward, and the water seal lips face outward, forming a structural chamber between them. After long-term operation, the stern shaft seal at the end of the unit may wear and fail, allowing oil and water to seep through this chamber and leak into each other. This leads to oil leakage from the bearing housing, contaminating the aquatic environment. External water entering the bearing housing causes oil emulsification, damaging the bearing's operating environment and ultimately causing bearing failure. Current technology cannot detect the oil-water mixing within the structural chamber of the stern shaft seal in real time, nor can it prevent the oil-water mixture from entering the bearing housing, which is detrimental to the safe operation of horizontal water pump units. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a flow guiding and sampling device for the stern shaft sealing balance chamber of a horizontal water pump unit, which solves the problems mentioned in the background.

[0005] This invention provides the following technical solution: a flow guiding and sampling device for the stern shaft seal balance chamber of a horizontal water pump unit, comprising: A ballast tank mechanism installed on the stern shaft seal to collect and discharge leaked fluid in the event of a leak. The ballast tank mechanism includes: Oil seal and first water seal to achieve internal oil seal isolation and external water seal isolation; and, A balance chamber located between the oil seal and the first water seal is used to collect leaked liquid; A flow guiding mechanism, located below the balancing chamber mechanism, guides leaked liquid from the balancing chamber mechanism into the collection mechanism via a constant pressure mechanism during detection. The flow guiding mechanism includes: A copper pipe positioned below the balance chamber serves to guide leaking liquid while simultaneously measuring hydraulic pressure using a hydraulic gauge; and, A transparent flexible tube is located at the end of the copper tube away from the balance chamber to facilitate the diversion of leaked liquid into the collection tank. A collection mechanism, located at the output end of the diversion mechanism and below the balance chamber mechanism, is provided to collect leaked liquid. The collection mechanism includes: A collection tank located at the outlet of the transparent hose to collect leaked waste liquid; and, A drain valve that is fixedly installed on the surface of the collection tank; A constant pressure mechanism, disposed between the balancing chamber mechanism and the flow guiding mechanism, assists the balancing chamber mechanism in draining liquid. The constant pressure mechanism includes: A docking seat installed at the bottom of the balance chamber; and, The male connector is fixedly inserted at the bottom of the docking seat to connect the flow guiding mechanism and the balance chamber mechanism.

[0006] Preferably, the balance chamber mechanism further includes: A second water seal is fixedly disposed on one side of the oil seal, wherein the lip of the oil seal faces inward, and the lips of the first and second water seals face outward, so as to form a balanced chamber between the first water seal and the oil seal; and, An external drain port is located at the bottom of the balance chamber to drain leaked liquid.

[0007] Preferably, the flow guiding mechanism further includes: A female connector is fixedly connected to the input end of the copper pipe to connect the copper pipe with the male connector; A hydraulic gauge, fixedly mounted on the surface of a copper tube, is used to measure the hydraulic pressure inside the balance chamber; and, The first switch valve is fixedly connected between the copper pipe and the transparent flexible tube.

[0008] Preferably, the flow guiding mechanism further includes: A second switch valve is fixedly connected to the output end of the transparent hose to control the flow of leaking liquid inside the transparent hose.

[0009] Preferably, the collection mechanism further includes: A level gauge is fixedly installed on the surface of the collection tank to display the liquid level inside the collection tank in real time; A closed top plate is fixedly connected to the inner wall of the liquid collection tank, and the closed top plate is fixedly connected to the output end of the second switching valve; and, A supplementary lighting glass window is fixedly connected inside the enclosed top plate to guide light into the liquid collection tank and assist the liquid level gauge in displaying the liquid level.

[0010] Preferably, the collection mechanism further includes: Multiple baffles are fixedly connected to the bottom of the closed top plate, and the bottom of the baffles and the inner bottom wall of the collection tank are provided with flow ports to separate the liquid surface of the leaking liquid inside the collection tank. A heat-conducting sheet fixedly connected inside the wave-damping plate to evenly transfer the heat from the heat-conducting protective cylinder into the leaking liquid; and, A vent is located at the top of the baffle plate to ensure air pressure communication above the liquid level inside the collection tank.

[0011] Preferably, the collection mechanism further includes: A heat-insulating protective cylinder is fixedly connected inside the liquid collection tank to isolate the heat from the electric heater; A heat-conducting protective cylinder, fixedly installed in the middle of the heat-insulating protective cylinder, protects the electric heater while transferring heat into the leaking liquid; and, An electric heater is fixedly installed inside the heat-insulating protective cylinder to heat and maintain the temperature of the leaked liquid inside the collection tank, preventing the oil in the leaked liquid from solidifying.

[0012] Preferably, the collection mechanism further includes: A negative pressure pump is fixedly installed inside the enclosed top plate to generate negative pressure and actively suck up the leaking liquid; An exhaust port is located on the surface of the negative pressure pump, and an air inlet is located at the bottom of the negative pressure pump; A first filter sleeve is fixedly fitted onto the surface of the negative pressure pump to protect and isolate the exhaust port; A guide slide frame is fixedly connected to the bottom of the negative pressure pump to guide and support the sealing float. A sealing float is slidably connected to the surface of the lower guide rail, and the sealing float is located below the air inlet to seal the air inlet when the liquid level is too high; and, A sealing plate is fixedly connected to the upper surface of the sealing pontoon to improve the sealing performance of the sealing pontoon.

[0013] Preferably, the constant pressure mechanism further includes: An air inlet hole is provided through the surface of the docking seat to guide airflow into the balance chamber during liquid discharge; A fixing mesh fixedly connected to the surface of the docking seat; and, A second filter sleeve is fixedly connected between the fixed mesh and the docking seat to filter the airflow entering the air intake.

[0014] Preferably, the constant pressure mechanism further includes: An extension head integrated into the top of the male connector; and, A one-way diaphragm flap is fixedly fitted onto the surface of the extension head, and the surface of the one-way diaphragm flap is slidably connected to the inner wall of the docking seat to ensure that the intake airflow through the air inlet can flow in one direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The horizontal water pump unit's stern shaft seal balance chamber diversion and sampling device, through its balance chamber mechanism, diversion mechanism, collection mechanism, and constant pressure mechanism, can, during operation, create a balance chamber within the balance chamber mechanism to isolate the oil-water channel between the oil seal and the first water seal. The diversion mechanism then concentrates the leaking liquid inside the balance chamber mechanism into the collection mechanism, facilitating subsequent detection of the leaking liquid within the collection mechanism to obtain leakage status information. This effectively solves the problem of oil leakage and water ingress leading to seal failure at the stern shaft seal of the water pump unit, ensuring the safe operation of the horizontal water pump unit.

[0016] The horizontal water pump unit's stern shaft sealed balance chamber diversion and sampling device, through the oil seal, first water seal, balance chamber, second water seal, and external drain interface, can collect leaking liquid through the balance chamber in the event of leakage.

[0017] The horizontal water pump unit's stern shaft sealed balance chamber flow guiding and sampling device, through a copper pipe, transparent flexible hose, connecting female connector, hydraulic gauge, first switch valve, and second switch valve, can indirectly understand the internal leakage information of the balance chamber based on the hydraulic pressure changes on the hydraulic gauge. This ensures timely detection and sampling.

[0018] The horizontal water pump unit's stern shaft sealing balance chamber flow guiding and sampling device, through the installation of a collection tank, drain valve, level gauge, enclosed top plate, supplemental lighting glass window, wave shield, wave shield heat conduction sheet, vent, heat insulation protective cylinder, heat conduction protective cylinder, electric heater, negative pressure pump, exhaust port, air inlet, first filter sleeve, lower guide slide, sealing float and sealing plate, can collect samples for real-time quantitative monitoring of water seals and oil seals. This facilitates subsequent assessment of seal wear rate, aging degree and failure status based on changes in parameters such as leakage flow rate, providing information for subsequent preventive maintenance and targeted repairs.

[0019] The horizontal water pump unit's stern shaft sealed balance chamber flow guiding and sampling device, through the set docking seat, docking male head, air inlet, fixing screen, second filter sleeve, extension head and one-way membrane flap, can timely introduce gas through the air inlet when the balance chamber is draining, ensuring air pressure balance and improving the smoothness of liquid drainage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a cross-sectional view of the balance chamber mechanism of the present invention; Figure 4 This is a cross-sectional view of the constant pressure mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the collection mechanism of the present invention; Figure 6This is a cross-sectional view of the collection mechanism of the present invention; Figure 7 This is a schematic diagram of the structure at the location of the negative pressure pump in this invention; Figure 8 This is a cross-sectional view of the location of the negative pressure pump in this invention; Figure 9 This is a schematic diagram of the structure at the location of the electric heater in this invention; Figure 10 This is a schematic diagram of the flow guiding mechanism of the present invention.

[0021] In the picture: 101. Oil seal; 102. First water seal; 103. Balance chamber; 104. Second water seal; 105. External drain port; 201. Copper pipe; 202. Transparent flexible hose; 203. Connecting female connector; 204. Hydraulic gauge; 205. First switching valve; 206. Second switching valve; 301. Collection tank; 302. Drain valve; 303. Level gauge; 304. Enclosed top plate; 305. Supplemental lighting glass window; 306. Wave shield; 307. Wave shielding and heat conduction. 308. Vent; 309. Heat insulation protective cylinder; 310. Heat conduction protective cylinder; 311. Electric heater; 312. Negative pressure pump; 313. Exhaust port; 314. Air inlet; 315. First filter sleeve; 316. Lower edge guide rail; 317. Sealing float; 318. Sealing plate; 401. Docking seat; 402. Docking male head; 403. Air inlet; 404. Fixing net; 405. Second filter sleeve; 406. Extension head; 407. One-way membrane flap. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-10 A horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device, comprising: A ballast tank mechanism installed on the stern shaft seal to collect and discharge leaked fluid in the event of a leak. The ballast tank mechanism includes: Oil seal 101 and first water seal 102 are used to achieve internal oil seal isolation and external water seal isolation; and, The balance chamber 103 located between the oil seal 101 and the first water seal 102 is used to collect leaked liquid; A flow guiding mechanism, located below the balancing chamber mechanism, guides the leaking liquid from the balancing chamber mechanism into the collection mechanism via a constant pressure mechanism during testing. The flow guiding mechanism includes: A copper pipe 201 is installed below the balance chamber 103 to guide the leakage liquid while simultaneously measuring the hydraulic pressure using a hydraulic gauge 204; and, A transparent flexible tube 202 is located at the end of the copper tube 201 away from the balance chamber 103 to facilitate the introduction of leaked liquid into the collection tank 301; A collection mechanism is located at the output end of the diversion mechanism and below the balance chamber mechanism to collect leaked liquid. The collection mechanism includes: A collection tank 301 located at the outlet of the transparent hose 202 is used to collect leaked waste liquid; and, A drain valve 302 is fixedly installed on the surface of the liquid collection tank 301; A constant pressure mechanism is installed between the balance chamber mechanism and the flow guiding mechanism to assist the balance chamber mechanism in draining liquid. The constant pressure mechanism includes: The docking seat 401 is installed at the bottom of the balance chamber 103; and, The male connector 402 is fixedly inserted into the bottom of the docking seat 401 to connect the flow guiding mechanism and the balance chamber mechanism. By incorporating a balance chamber mechanism, a flow guiding mechanism, a collection mechanism, and a constant pressure mechanism, a balance chamber can be established inside the stern shaft seal during operation. This isolates the oil-water channel between the oil seal and the first water seal. The flow guiding mechanism concentrates the leaking liquid inside the balance chamber into the collection mechanism, facilitating subsequent detection of the leaking liquid within the collection mechanism to obtain leakage status information. This effectively solves the problem of oil and water leakage leading to seal failure at the stern shaft seal of the pump unit, ensuring the safe operation of the horizontal pump unit. At the same time, it achieves directional flow guidance and closed storage of leaking liquid, preventing the cooling or lubricating media from polluting the equipment operating environment and aquatic ecosystem.

[0024] The balance cabin mechanism also includes: A second water seal 104 is fixedly disposed on one side of the oil seal 101, wherein the lip of the oil seal 101 faces inward and the lips of the first water seal 102 and the second water seal 104 face outward, so as to form a balanced chamber 103 between the first water seal 102 and the oil seal 101; and, An external drain port 105 is provided at the bottom of the balance chamber 103 to drain leaked liquid; With the oil seal 101, the first water seal 102, the balance chamber 103, the second water seal 104, and the external drain port 105, the leaking liquid can be collected in a concentrated manner through the balance chamber 103 when leakage occurs.

[0025] The flow guiding mechanism also includes: A female connector 203 is fixedly connected to the input end of the copper tube 201 to connect the copper tube 201 with the male connector 402; A hydraulic gauge 204 is fixedly mounted on the surface of the copper tube 201 to measure the hydraulic pressure inside the balance chamber 103; and, A first switching valve 205 is fixedly connected between the copper pipe 201 and the transparent flexible tube 202.

[0026] The flow guiding mechanism also includes: A second switch valve 206 is fixedly connected to the output end of the transparent hose 202 to control the flow of leaking liquid inside the transparent hose 202. The copper pipe 201, transparent flexible hose 202, connecting female connector 203, hydraulic gauge 204, first switching valve 205, and second switching valve 206 are configured to indirectly provide information on internal leakage within the balance chamber 103 based on the hydraulic pressure changes indicated by the hydraulic gauge 204. This ensures timely detection and sampling.

[0027] The collection agencies also include: A level gauge 303 is fixedly installed on the surface of the liquid collection tank 301 to display the liquid level inside the liquid collection tank 301 in real time; A closed top plate 304 is fixedly connected to the inner wall of the top of the collection tank 301, and the closed top plate 304 is fixedly connected to the output end of the second switching valve 206; and, A supplementary lighting glass window 305 is fixedly connected inside the enclosed top plate 304 to guide light into the liquid collection tank 301, and an auxiliary liquid level gauge 303 displays the liquid level.

[0028] The collection agencies also include: Multiple baffles 306 are fixedly connected to the bottom of the closed top plate 304, and the bottom of the baffles 306 and the inner bottom wall of the liquid collection tank 301 are provided with flow ports to separate the liquid surface of the liquid leaking inside the liquid collection tank 301. A heat-conducting anti-surge plate 307 is fixedly connected inside the anti-surge plate 306 to evenly transfer the heat from the heat-conducting protective cylinder 310 into the leaking liquid; and, A vent 308 is provided at the top of the baffle plate 306 to ensure air pressure communication above the liquid level inside the collection tank 301.

[0029] The collection agencies also include: A heat-insulating protective cylinder 309 is fixedly connected inside the liquid collection tank 301 to isolate the heat from the electric heater 311; A heat-conducting protective cylinder 310, fixedly installed in the middle of the heat-insulating protective cylinder 309, protects the electric heater 311 while transferring heat into the leaking liquid; and, The electric heater 311 is fixedly installed inside the heat insulation protective cylinder 309 to heat and maintain the temperature of the leaked liquid inside the liquid collection tank 301, so as to prevent the oil in the leaked liquid from solidifying.

[0030] The collection agencies also include: A negative pressure pump 312 is fixedly installed inside the closed top plate 304 to generate negative pressure and actively suck up the leaking liquid. An exhaust port 313 is provided on the surface of the negative pressure pump 312, and an air inlet 314 is provided at the bottom of the negative pressure pump 312; A first filter sleeve 315 is fixedly fitted onto the surface of the negative pressure pump 312 to protect and isolate the exhaust port 313; The lower edge guide slide 316 is fixedly connected to the bottom of the negative pressure pump 312 to guide and support the sealing float 317; A sealing float 317 is slidably connected to the surface of the lower guide rail 316, and the sealing float 317 is located below the air inlet 314 to seal the air inlet 314 when the liquid level is too high; and, A sealing piece 318 is fixedly connected to the upper surface of the sealing float 317 to improve the sealing performance of the sealing float 317; By incorporating a collection tank 301, a drain valve 302, a level gauge 303, a sealed top plate 304, a supplementary lighting glass window 305, a wave deflector 306, a wave deflector heat-conducting sheet 307, a vent 308, a heat insulation protective cylinder 309, a heat-conducting protective cylinder 310, an electric heater 311, a negative pressure pump 312, an exhaust port 313, an air inlet 314, a first filter sleeve 315, a lower guide rail 316, a sealing float 317, and a sealing plate 318, real-time quantitative monitoring of water seals and oil seals can be performed to collect samples. This facilitates subsequent assessment of the wear rate, aging degree, and failure status of the seals based on changes in parameters such as leakage flow rate, providing information for subsequent preventive maintenance and targeted repairs.

[0031] The constant pressure mechanism also includes: An air inlet 403 is provided through the surface of the docking seat 401 to guide airflow into the balance chamber 103 during liquid discharge. The fixing mesh 404 is fixedly connected to the surface of the docking seat 401; and, A second filter sleeve 405 is fixedly connected between the fixed mesh 404 and the docking seat 401 to filter the airflow entering the air inlet 403.

[0032] The constant pressure mechanism also includes: An extension head 406 is integrally mounted on top of the male connector 402; and, A one-way diaphragm flap 407 is fixedly sleeved on the surface of the extension head 406, and the surface of the one-way diaphragm flap 407 is slidably connected to the inner wall of the docking seat 401 to ensure that the intake airflow through the air inlet 403 can flow in one direction. With the included docking seat 401, male docking head 402, air inlet 403, fixing mesh 404, second filter sleeve 405, extension head 406, and one-way membrane flap 407, gas can be introduced in a timely manner through the air inlet 403 when the balance chamber 103 is draining, ensuring air pressure balance and improving the smoothness of drainage.

[0033] Working principle: When liquid leaks into the balance chamber 103, the hydraulic gauge 204 will detect the change in hydraulic pressure. At this time, the drain valve 302 will be closed, and the first switch valve 205 and the second switch valve 206 will be opened. The liquid inside the balance chamber 103 will enter the copper pipe 201 through the docking seat 401 and the extension head 406, and then be introduced into the collection tank 301 along the transparent hose 202. When the balance chamber 103 is drained, external air will enter the docking seat 401 through the air inlet 403, and then push open the one-way diaphragm flap 407 to replenish the balance chamber 103, thereby ensuring air pressure balance. After the liquid enters the collection tank 301, the liquid level change can be observed through the level gauge 303; When active liquid extraction is required, the negative pressure pump 312 is started. The negative pressure pump 312 draws air to create negative pressure inside the liquid collection tank 301, thereby improving the liquid extraction efficiency. When the liquid level is too high, the liquid level will rise and the sealing float 317 will float up until the sealing plate 318 seals the air inlet 314, thereby preventing the liquid from easily leaking through the negative pressure pump 312. When taking a sample, open the drain valve 302 and the liquid will be discharged from the drain valve 302. If the ambient temperature is too low, the electric heater 311 can be turned on before taking the sample. The electric heater 311 heats the liquid through the heat-conducting protective cylinder 310 to prevent the oil inside the liquid from solidifying.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow guiding and sampling device for the stern shaft seal balance chamber of a horizontal water pump unit, characterized in that, include: A ballast tank mechanism installed on the stern shaft seal to collect and discharge leaked fluid in the event of a leak. The ballast tank mechanism includes: An oil seal (101) and a first water seal (102) are used to achieve internal oil seal isolation and external water seal isolation; and, A balance chamber (103) is located between the oil seal (101) and the first water seal (102) to collect leaked liquid; A flow guiding mechanism, located below the balancing chamber mechanism, guides leaked liquid from the balancing chamber mechanism into the collection mechanism via a constant pressure mechanism during detection. The flow guiding mechanism includes: A copper pipe (201) is installed below the balance chamber (103) to guide the leakage liquid while simultaneously measuring the hydraulic pressure using a hydraulic gauge (204); and, A transparent flexible tube (202) is located at the end of the copper tube (201) away from the balance chamber (103) to facilitate the introduction of leaked liquid into the collection tank (301). A collection mechanism, located at the output end of the diversion mechanism and below the balance chamber mechanism, is provided to collect leaked liquid. The collection mechanism includes: A collection tank (301) located at the outlet of the transparent hose (202) is provided to collect leaked waste liquid; and, A drain valve (302) is fixedly installed on the surface of the collection tank (301); A constant pressure mechanism, disposed between the balancing chamber mechanism and the flow guiding mechanism, assists the balancing chamber mechanism in draining liquid. The constant pressure mechanism includes: A docking seat (401) installed at the bottom of the balance chamber (103); and, The male connector (402) is fixedly inserted into the bottom of the docking seat (401) to dock the flow guiding mechanism with the balance chamber mechanism.

2. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 1, characterized in that, The balance chamber mechanism also includes: A second water seal (104) is fixedly disposed on one side of the oil seal (101), wherein the lip of the oil seal (101) faces inward and the lips of the first water seal (102) and the second water seal (104) face outward, so as to form a balanced chamber (103) between the first water seal (102) and the oil seal (101); and, An external drain port (105) is provided at the bottom of the balance chamber (103) to drain the leaked liquid.

3. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 1, characterized in that, The flow guiding mechanism also includes: A female connector (203) is fixedly connected to the input end of the copper tube (201) to connect the copper tube (201) with the male connector (402); A hydraulic gauge (204) is fixedly mounted on the surface of the copper tube (201) to measure the hydraulic pressure inside the balance chamber (103); and, A first switching valve (205) is fixedly connected between a copper pipe (201) and a transparent flexible tube (202).

4. The device for guiding and sampling the stern shaft seal balance chamber of a horizontal water pump unit according to claim 3, characterized in that, The flow guiding mechanism also includes: A second switch valve (206) is fixedly connected to the output end of the transparent hose (202) to control the flow of leaking liquid inside the transparent hose (202).

5. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 1, characterized in that, The collection facility also includes: A level gauge (303) is fixedly installed on the surface of the collection tank (301) to display the liquid level inside the collection tank (301) in real time; A closed top plate (304) is fixedly connected to the inner wall of the top of the collection tank (301), and the closed top plate (304) is fixedly connected to the output end of the second switching valve (206); and, A supplementary light glass window (305) is fixedly connected inside the closed top plate (304) to guide light into the liquid collection tank (301) and to assist the liquid level gauge (303) in displaying the liquid level.

6. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 5, characterized in that, The collection facility also includes: Multiple baffles (306) are fixedly connected to the bottom of the closed top plate (304), and the bottom of the baffles (306) and the inner bottom wall of the liquid collection tank (301) are provided with flow ports to separate the liquid surface of the liquid leakage inside the liquid collection tank (301). A heat-conducting sheet (307) fixedly connected inside the wave-damping plate (306) is used to evenly transfer the heat from the heat-conducting protective cylinder (310) into the leaking liquid; and, A vent (308) is provided at the top of the baffle plate (306) to ensure air pressure communication above the liquid level inside the collection tank (301).

7. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 6, characterized in that, The collection facility also includes: A heat-insulating protective cylinder (309) is fixedly connected inside the liquid collection tank (301) to isolate the heat of the electric heater (311); A heat-conducting protective cylinder (310) is fixedly installed in the middle of the heat-insulating protective cylinder (309) to protect the electric heater (311) while transferring heat into the leaking liquid; and, An electric heater (311) is fixedly installed inside the heat-insulating protective cylinder (309) to heat the leaked liquid inside the collection tank (301) at a constant temperature to prevent the oil in the leaked liquid from solidifying.

8. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 7, characterized in that, The collection facility also includes: A negative pressure pump (312) is fixedly installed inside the closed top plate (304) to generate negative pressure and actively suck up the leakage liquid; An exhaust port (313) is provided on the surface of the negative pressure pump (312), and an air inlet (314) is provided at the bottom of the negative pressure pump (312). A first filter sleeve (315) is fixedly fitted onto the surface of the negative pressure pump (312) to protect and isolate the exhaust port (313); The lower edge guide rail (316) is fixedly connected to the bottom of the negative pressure pump (312) to guide and support the sealing float (317); A sealing float (317) is slidably connected to the surface of the lower guide rail (316), and the sealing float (317) is located below the air inlet (314) to seal the air inlet (314) when the liquid level is too high; and, A sealing piece (318) is fixedly connected to the upper surface of the sealing pontoon (317) to improve the sealing performance of the sealing pontoon (317).

9. The device for guiding and sampling the stern shaft seal balance chamber of a horizontal water pump unit according to claim 1, characterized in that, The constant pressure mechanism also includes: An air inlet (403) is provided through the surface of the docking seat (401) to introduce airflow into the balance chamber (103) during liquid discharge. A fixing mesh (404) is fixedly connected to the surface of the docking seat (401); and, A second filter sleeve (405) is fixedly connected between the fixed mesh (404) and the docking seat (401) to filter the airflow entering the air inlet (403).

10. The horizontal water pump unit stern shaft seal balance chamber flow guiding and sampling device according to claim 9, characterized in that, The constant pressure mechanism also includes: An extension head (406) integrally set on top of the male connector (402); and, A one-way diaphragm flap (407) is fixedly sleeved on the surface of the extension head (406), and the surface of the one-way diaphragm flap (407) is slidably connected to the inner wall of the docking seat (401) to ensure that the intake airflow through the air inlet (403) can flow in one direction.

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