CN218669913U - Shaft seal cooling water supply device and shaft seal cooling system - Google Patents

Abstract

The application discloses shaft seal cooling water supply installation and shaft seal cooling system relates to cooling technical field. The shaft seal cooling water supply device comprises at least two water storage barrels, a water supply pipe, a water return pipe, a sewage discharge pipe and a control component; the water supply pipe comprises a main water supply pipe and a sub water supply pipe, and one sub water supply pipe is connected with one water storage barrel; the water return pipe comprises a main water return pipe and a sub water return pipe, and one sub water return pipe is connected with one water storage barrel; the sewage discharge pipe comprises a main sewage discharge pipe and a sub sewage discharge pipe, and one sub sewage discharge pipe is connected with one water storage barrel; the control assembly is used for controlling the connection of the water storage barrel, the sub water supply pipe, the sub water return pipe and the sub sewage discharge pipe to be switched on or off, the main water supply pipe is connected with the shaft seal, and the main water return pipe is connected with the shaft seal. The utility model provides a shaft seal cooling water supply installation also can carry out the cooling work of shaft seal simultaneously when changing the cooling water, reduces the waste of water resource.

Description

Shaft seal cooling water supply device and shaft seal cooling system

Technical Field

The application relates to the technical field of water supply equipment, in particular to a shaft seal cooling water supply device and a shaft seal cooling system.

Background

The shaft seal is a friction seal or stuffing box to prevent fluid leakage between the compressor or other fluid transport device shaft and the bearing. The shaft seal is a sealing device arranged to prevent leakage between the pump and the housing. Common shaft seal types are packing seals, mechanical seals and dynamic seals.

However, during the use of the shaft seal, a large amount of heat is generated, and if the heat is not dissipated in time, the shaft seal is damaged, and in the common cooling of the shaft seal, a PVC (polyvinyl chloride) pipe is usually disposed to connect the shaft seal, and cooling water is transported to the shaft seal in the PVC pipe for cooling.

However, if the sealing performance of the shaft seal is not good during the use process, the cooling water is likely to be polluted, the cooling effect of the cooling water is reduced, and at this moment, the cooling water needs to be replaced in time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shaft seal cooling water supply installation and shaft seal cooling system also can carry out the cooling work of shaft seal simultaneously when changing the cooling water, reduces the waste of water resource.

The application discloses a shaft seal cooling water supply device, which comprises at least two water storage barrels, a water supply pipe, a water return pipe, a drain pipe and a control component, wherein the water storage barrels are arranged; the water supply pipes comprise a main water supply pipe and sub water supply pipes which are communicated with each other, the number of the sub water supply pipes is the same as that of the water storage barrels, and one sub water supply pipe is connected with one water storage barrel; the water return pipe comprises a main water return pipe and sub water return pipes which are communicated with each other, the number of the sub water return pipes is the same as that of the water storage barrels, and one sub water return pipe is connected with one water storage barrel; the sewage discharge pipe comprises a main sewage discharge pipe and sub sewage discharge pipes which are communicated with each other, the number of the sub sewage discharge pipes is the same as that of the water storage barrels, and one sub sewage discharge pipe is connected with one water storage barrel; the control component is used for controlling the connection and the disconnection of the water storage barrel, the sub water supply pipe, the sub water return pipe and the sub sewage discharge pipe; the main water supply pipe is connected with the shaft seal, the main water return pipe is connected with the shaft seal, and the number of the control assemblies is the same as that of the water storage barrels.

Optionally, the shaft seal cooling water supply device further comprises a water supply pipe, the water supply pipe comprises a main water supply pipe and sub water supply pipes which are communicated with each other, the number of the sub water supply pipes is the same as that of the water storage barrels, one sub water supply pipe is connected with one water storage barrel, and the main water supply pipe is used for supplying cooling water to the water storage barrel.

Optionally, the control assembly comprises a first valve, a second valve and a third valve, the first valve is arranged at one end, connected with the main water supply pipe, of the sub water supply pipe, the second valve is arranged at one end, connected with the main water return pipe, of the sub water return pipe, the third valve is arranged at one end, connected with the main sewage discharge pipe, of the sub sewage discharge pipe, and the first valve, the second valve and the third valve are controlled independently.

Optionally, the cross-sectional area of the sub water supply pipe is smaller than that of the main water supply pipe, the cross-sectional area of the sub water return pipe is smaller than that of the main water return pipe, and the cross-sectional area of the sub sewage discharge pipe is smaller than that of the main sewage discharge pipe.

Optionally, the secondary sewage draining pipe and the secondary water supplying pipe are arranged at the bottom of the water storage barrel, and the secondary water returning pipe is arranged at the top of the water storage barrel.

Optionally, the shaft seal cooling water supply device further comprises a water level monitor, and the water level monitor is connected with the water storage barrel and used for detecting the content of cooling water in the water storage barrel.

Optionally, the shaft seal cooling water supply device further comprises a water quality detector, wherein the water quality detector is arranged inside the water storage barrel and used for detecting the pollution degree of the cooling water in the water storage barrel.

Optionally, a pressurizing piece is further arranged in the water storage barrel, and the pressurizing piece is used for increasing the water pressure of the cooling water.

Optionally, the shaft seal cooling water supply device further comprises a water tank, the main water replenishing pipe is connected with the water tank, and the cross-sectional area of the sub water replenishing pipe is half of the cross-sectional area of the main water replenishing pipe.

The application also discloses shaft seal cooling system, include as above shaft seal cooling water supply installation, shaft seal and pumping, the shaft seal sets up on the pumping, shaft seal cooling water supply installation with the shaft seal is connected for the shaft seal provides cooling water.

The utility model provides a bearing seal cooling water supply installation is when changing the cooling water, through using the connection disconnection of control assembly with one of them water storage bucket and sub-delivery pipe and sub-wet return, make need not stop corresponding equipment when changing the cooling water, bearing seal cooling water supply installation can also continue to provide cooling work for the bearing seal, and it changes the cooling water to be single water storage bucket in proper order when changing the cooling water, need not discharge contaminated cooling water on one side, supply the cooling water on one side, the waste of water resource is reduced to a certain extent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic structural view of a shaft seal cooling water supply device according to a first embodiment of the present application;

fig. 2 is a schematic structural view of a shaft seal cooling water supply device according to a second embodiment of the present application;

FIG. 3 is a schematic view of a second embodiment of the present application;

fig. 4 is a schematic structural diagram of a shaft seal cooling system according to a third embodiment of the present application.

100, a shaft seal cooling water supply device; 110. a water storage barrel; 120. a water supply pipe; 121. a main water supply pipe; 122. a sub water supply pipe; 130. a water return pipe; 131. a primary water return pipe; 132. a secondary water return pipe; 140. a blow-off pipe; 141. a main blowdown pipe; 142. a sub blow-off pipe; 150. a water replenishing pipe; 151. a main water replenishing pipe; 152. a sub water replenishing pipe; 160. a control component; 161. a first valve; 162. a second valve; 163. a third valve; 164. a fourth valve; 170. a water level monitor; 180. a water quality detector; 190. a pressure increasing member; 200. a water tank; 300. shaft sealing; 400. pumping; 500. a shaft seal cooling system.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and any variations thereof, are intended to cover a non-exclusive inclusion, which may have the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or combinations thereof.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

The present application will now be described in detail with reference to the drawings and alternative embodiments, it being understood that any combination of the various embodiments or technical features described below may form new embodiments without conflict.

As shown in fig. 1, as a first embodiment of the present application, a shaft seal cooling water supply device 100 is disclosed, which is used for providing cooling water for a shaft seal for cooling, the shaft seal cooling water supply device 100 includes a water storage barrel 110, a water supply pipe 120, a water return pipe 130 and a sewage drain 140, the water storage barrel 110 is provided with at least two water supply pipes 120, the water supply pipe 120 includes a main water supply pipe 121 and a sub water supply pipe 122 which are communicated with each other, the number of the sub water supply pipes 122 is the same as that of the water storage barrel 110, one sub water supply pipe 122 is connected with one water storage barrel 110, the water return pipe 130 includes a main water return pipe 131 and a sub water return pipe 132 which are communicated with each other, the number of the sub water return pipes 132 is the same as that of the water storage barrel 110, one sub water return pipe 132 is connected with one water storage barrel 110, the sewage drain 140 includes a main sewage drain 141 and a sub sewage drain 142 which are communicated with each other, the number of the sub sewage drain 142 is the same as that of the water storage barrel 110, and one sewage drain 142 is connected with one water storage barrel 110; the control unit 160 is used for separating the water storage barrel 110 from the sub water supply pipe 122 and the sub water return pipe 132, the main water supply pipe 121 is connected to the shaft seal to supply cooling water to the shaft seal for cooling, the main water return pipe 131 is connected to the shaft seal to return the cooling water to the water storage barrel 110, the main sewage discharge pipe 141 is used for discharging the cooling water in the water storage barrel 110, and the number of the control units 160 is the same as that of the water storage barrel 110.

When the shaft seal cooling water supply device 100 is used, cooling water in two water storage barrels 110 is respectively gathered on a main water supply pipe 121 through two sub water supply pipes 122 and then is conveyed to a shaft seal position through the main water supply pipe 121 to cool the shaft seal so as to reduce the temperature of the shaft seal and eliminate heat generated by shaft seal friction, and the cooling water which is cooled at the shaft seal position flows into two sub water return pipes 132 along with a main water return pipe 131 and is conveyed into the water storage barrel 110 corresponding to the sub water return pipes 132 through the two sub water return pipes 132 so as to complete a cooling water circulation process, so that the shaft seal is continuously cooled through a continuous cooling water circulation process, and the temperature of the shaft seal is continuously reduced; however, since the sealing performance of the shaft seal may be poor with the use, so that the cooling water may be polluted, the cooling effect of the cooling water may be reduced, when the cooling water is polluted, the cooling water in the water storage barrels 110 may need to be replaced in time, at this time, the control component 160 may be used to disconnect one of the water storage barrels 110 from the sub water supply pipe 122 and the sub water return pipe 132, so that only one water storage barrel 110 in the shaft seal cooling water supply apparatus 100 is cooled, at this time, the cooling water in the disconnected water storage barrel 110 may be discharged through the sub blow-off pipe 142, and then the water storage barrel 110 may be cleaned and the uncontaminated cooling water may be refilled into the water storage barrel 110, and then the control component 160 may conduct the connection of the water storage barrel 110 with the sub water supply pipe 122 and the sub water return pipe 132, and simultaneously disconnect the other water storage barrel 110 from the sub water supply pipe 122 and the sub water return pipe 132, the arrangement can ensure that the shaft seal cooling water supply device 100 can continue to work and cool the shaft seal when the cooling water is replaced, so that the pump connected with the shaft seal does not need to stop working, and the normal work of the pump cannot be influenced by replacing the cooling water; in general, the shaft seal cooling water supply device 100 can not only continue the cooling operation of the shaft seal when the cooling water is replaced, but also reduce the waste of water resources because the water is not required to be added and drained when the cooling water is replaced; in addition, it should be noted that the number of the water storage tanks 110 in this embodiment is not limited to two, and more water storage tanks 110 may be provided, and a designer may select and design the number of the water storage tanks 110 according to actual requirements, which is not limited herein.

Further, the shaft seal cooling water supply device 100 further comprises a water replenishing pipe 150, the water replenishing pipe 150 comprises a main water replenishing pipe 151 and sub water replenishing pipes 152 which are communicated with each other, the number of the sub water replenishing pipes 152 is the same as that of the water storage barrels 110, one sub water replenishing pipe 152 is connected with one water storage barrel 110, the main water replenishing pipe 151 is used for supplying cooling water to the water storage barrel 110, the water storage barrel 110 can be directly sealed after cleaning is completed, then the cooling water is conveyed to the sub water replenishing pipe 152 through the main water replenishing pipe 151, and then the cooling water is conveyed to the water storage barrel 110 through the sub water replenishing pipe 152 to fill the water storage barrel 110, so that other devices are not required to be additionally arranged to convey the cooling water to fill the water storage barrel 110, an occupied space of the shaft seal cooling water supply device 100 is not required to be additionally arranged, meanwhile, the cooling water is directly conveyed to the water storage barrel 110 through the water replenishing pipe 150, and the cooling water is prevented from being directly contacted with the outside to cause cooling water pollution.

As a further explanation of the above embodiment, the control unit 160 includes a first valve 161, a second valve 162 and a third valve 163, the first valve 161 is disposed at one end of the sub water supply pipe 122 connected to the main water supply pipe 121, the second valve 162 is disposed at one end of the sub water return pipe 132 connected to the main water return pipe 131, the third valve 163 is disposed at one end of the sub sewage discharge pipe 142 connected to the main sewage discharge pipe 141, when the shaft seal cooling water supply device 100 is in normal use, the first valve 161 and the second valve 162 are in an open state, the third valve 163 is in a closed state, when the sub water supply pipe 122 is in a conduction state with the main water supply pipe 121, the sub water return pipe 132 is in a conduction state with the main water return pipe 131, the cooling water in the water storage barrel 110 can flow to the shaft seal through the water supply pipe 120 and then flow back to the water storage barrel 110 through the water return pipe 130, that is the water storage barrel 110 in a circulatable connection with the main water supply pipe 121; when the cooling water needs to be replaced, the first valve 161 and the second valve 162 on the sub water supply pipe 122 and the sub water return pipe 132 connected with the single water storage barrel 110 are controlled to be in a closed state, and the third valve 163 on the sub sewage discharge pipe 142 connected with the water storage barrel 110 is opened, so that the cooling water in the water storage barrel 110 is not added to the cooling work of the shaft seal, but is directly discharged, and the water supply pipe 150 supplies cooling water to the water storage barrel 110 after the discharging is finished; it should be noted that the first valve 161, the second valve 162, and the third valve 163 are all controlled individually, and the specific control manner may be manual control, computer control, and the like, and the control manner here is not described in detail.

The control assembly 160 further includes a fourth valve 164, the fourth valve 164 is disposed at one end of the sub water replenishing pipe 152 connected to the main water replenishing pipe 151, and when the cooling water needs to be replenished into the water storage tub 110, the fourth valve 164 is in an open state, and the cooling water flows into the water storage tub 110 through the main water replenishing pipe 151 and the sub water replenishing pipe 152.

Further, the cross-sectional area of the sub water supply pipe 122 is smaller than that of the main water supply pipe 121, the cross-sectional area of the sub water return pipe 132 is smaller than that of the main water return pipe 131, and the cross-sectional area of the sub sewage discharge pipe 142 is smaller than that of the main sewage discharge pipe 141, so that the capacities of the main water supply pipe 121, the main water return pipe 131, and the main sewage discharge pipe 141 are large, and the cooling work and the discharge of the plurality of water storage buckets 110 can be simultaneously satisfied; in this embodiment, the number of the water storage tanks 110 is two, and at this time, the cross-sectional area of the sub water supply pipe 122 is half of the cross-sectional area of the main water supply pipe 121, the flow rates of the cooling water in the sub water supply pipe 122 and the main water supply pipe 121 are uniform, the cross-sectional area of the sub water return pipe 132 is half of the cross-sectional area of the main water return pipe 131, the flow rates of the cooling water in the sub water return pipe 132 and the main water return pipe 131 are uniform, the cross-sectional area of the sub sewage discharge pipe 142 is half of the cross-sectional area of the main sewage discharge pipe 141, and the flow rates of the cooling water in the sub sewage discharge pipe 142 and the main sewage discharge pipe 141 are uniform; in general, the relationship between the cross-sectional area of the sub water supply pipe 122 and the cross-sectional area of the main water supply pipe 121 is related to the number of the water storage tanks 110, the cross-sectional area of the sub water supply pipe 122 is equal to the cross-sectional area of the main water supply pipe 121 divided by the number of the water storage tanks 110, the relationship between the cross-sectional area of the sub water return pipe 132 and the cross-sectional area of the main water return pipe 131, and the relationship between the cross-sectional area of the sub sewage drain pipe 142 and the cross-sectional area of the main sewage drain pipe 141 are related to the number of the water storage tanks 110, and the arrangement is such that the flow rate of the cooling water is equal whether the cooling water is located in the sub water supply pipe 122 or the main water supply pipe 121, and the cooling effect of the shaft seal is ensured; wherein, the cross-sectional area of the sub water replenishing pipe 152 is smaller than that of the main water replenishing pipe 151, and when the number of the water storage barrels 110 is two, the cross-sectional area of the sub water replenishing pipe 152 is half of that of the main water replenishing pipe 151.

In this embodiment, the sub-sewage draining pipe 142 and the sub-water supplying pipe 122 are disposed at the bottom of the water storage barrel 110, the sub-water returning pipe 132 is disposed at the top of the water storage barrel 110, wherein the sub-water replenishing pipe 152 is also disposed at the top of the water storage barrel 110, the sub-sewage draining pipe 142 and the sub-water supplying pipe 122 are disposed at the bottom of the water storage barrel 110, the cooling water in the water storage barrel 110 can conveniently flow out of the water storage barrel 110 under the action of gravity, and the sub-water returning pipe 132 and the sub-water replenishing pipe 152 are disposed at the top of the water storage barrel 110, so that when the water storage barrel 110 is replenished with the cooling water, the water storage barrel 110 can be directly filled without being affected by the volume of the existing cooling water in the water storage barrel 110, and thus the cooling water can conveniently flow into the water storage barrel 110.

As shown in fig. 2 and fig. 3, as a second embodiment of the present application, which is a further improvement of the first embodiment of the present application, a shaft seal cooling water supply apparatus 100 is disclosed, the shaft seal cooling water supply apparatus 100 further includes a water level monitor 170, a water quality detector 180, a pressurizing member 190 and a water tank 200, the water level monitor 170 is connected to the water storage barrel 110 and is used for detecting the cooling water content in the flashing water storage barrel 110, when the cooling water content in the water storage barrel 110 is insufficient, the water level monitor 170 gives an alarm to inform a user to prompt the user that the cooling water needs to be supplemented;

the water quality detector 180 is arranged inside the water storage barrel 110 and used for detecting the pollution degree of the cooling water in the water storage barrel 110 so as to prompt a user that the cooling water is polluted and needs to be replaced in time; of course, whether the cooling water stored in the water storage barrel 110 is polluted or not can be directly observed through the window arranged on the water storage barrel 110; the shaft seal can be provided with a temperature detector, the strength of the cooling effect of the cooling water can be judged by detecting the temperature change of the shaft seal, so that whether the cooling water is polluted or not can be judged, designers can select and design according to actual requirements, and the design is not limited.

The pressurizing member 190 is disposed in the water storage barrel 110 for increasing the water pressure of the cooling water, when the shaft seal cooling water supply device 100 is replacing the cooling water, since the connection between one water storage barrel 110 and the sub water supply pipe 122 and the sub water return pipe 132 is disconnected, the volume of the cooling water for shaft seal cooling is halved, and the volume of the cooling water in the main water supply pipe 121 and the main water return pipe 131 is also halved, so that the water pressure of the cooling water is relatively reduced, and in order that the cooling effect of the shaft seal is not reduced due to the replacement of the cooling water, the inventor thought that the cooling effect is not reduced by increasing the water pressure of the cooling water by providing the pressurizing member 190.

In addition, in this embodiment, the main water replenishing pipe 151 is connected to the water tank 200, the cross-sectional area of the sub water replenishing pipe 152 is half of the cross-sectional area of the main water replenishing pipe 151, the cooling water is stored in the water tank 200, and when it is necessary to add cooling water into the water storage bucket 110, the cooling water is delivered into the water storage bucket 110 through the connection of the main water replenishing pipe 151 and the water tank 200; the manner of supplying the cooling water is not limited to the manner of providing the water tank 200 to store the cooling water, and the cooling water may be supplied in other manners.

As shown in fig. 4, as a third embodiment of the present application, a shaft seal cooling system 500 is disclosed, the shaft seal cooling system 500 includes a shaft seal 300, a pump 400 and the shaft seal cooling water supply device 100 according to the above embodiment, the shaft seal 300 is disposed on the pump 400, the shaft seal cooling water supply device 100 is connected to the shaft seal 300 to provide cooling water for the shaft seal 300, when the shaft seal cooling system 500 is used, the shaft seal cooling system 500 provides cooling water circulation for the shaft seal 300 to reduce the temperature of the shaft seal 300, and when the shaft seal cooling system 500 is used, the normal operation of the pump 400 is not affected when the cooling water is replaced, and the contaminated cooling water does not need to be discharged and the cooling water needs to be supplemented; in general, the shaft seal cooling system 500 can not only continue to cool the shaft seal 300 when the cooling water is replaced, but also avoid the situation of simultaneous water adding and draining when the cooling water is replaced, thereby reducing the waste of water resources.

It should be noted that the inventive concept of the present application can form many embodiments, but the space of the application document is limited, and the application document cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be combined arbitrarily to form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be considered as belonging to the protection scope of the present application.

Claims (10)

1. The utility model provides a shaft seal cooling water supply installation which characterized in that, shaft seal cooling water supply installation includes:

at least two water storage barrels are arranged;

the water supply pipes comprise a main water supply pipe and sub water supply pipes which are communicated with each other, the number of the sub water supply pipes is the same as that of the water storage barrels, and one sub water supply pipe is connected with one water storage barrel;

the water return pipe comprises a main water return pipe and secondary water return pipes which are communicated with each other, the number of the secondary water return pipes is the same as that of the water storage barrels, and one secondary water return pipe is connected with one water storage barrel;

the sewage discharge pipe comprises a main sewage discharge pipe and sub sewage discharge pipes which are communicated with each other, the number of the sub sewage discharge pipes is the same as that of the water storage barrels, and one sub sewage discharge pipe is connected with one water storage barrel; and

the control component is used for controlling the connection and the disconnection of the water storage barrel, the sub water supply pipe, the sub water return pipe and the sub sewage discharge pipe;

the main water supply pipe is connected with the shaft seal, the main water return pipe is connected with the shaft seal, and the number of the control assemblies is the same as that of the water storage barrels.

2. The shaft seal cooling water supply device according to claim 1, further comprising water replenishing pipes, wherein the water replenishing pipes comprise main water replenishing pipes and sub water replenishing pipes which are communicated with each other, the number of the sub water replenishing pipes is the same as that of the water storage barrels, and one of the sub water replenishing pipes is connected with one of the water storage barrels.

3. The shaft seal cooling water supply device according to claim 1, wherein the control assembly includes a first valve provided at an end of the sub water supply pipe connected to the main water supply pipe, a second valve provided at an end of the sub water return pipe connected to the main water return pipe, and a third valve provided at an end of the sub sewage drain pipe connected to the main sewage drain pipe, the first valve, the second valve, and the third valve being individually controlled.

4. The shaft seal cooling water supply device according to claim 1, wherein a cross-sectional area of the sub water supply pipe is smaller than a cross-sectional area of the main water supply pipe, a cross-sectional area of the sub water return pipe is smaller than a cross-sectional area of the main water return pipe, and a cross-sectional area of the sub drain pipe is smaller than a cross-sectional area of the main drain pipe.

5. The shaft seal cooling water supply device according to claim 1, wherein the sub drain pipe and the sub water supply pipe are disposed at the bottom of the water storage barrel, and the sub water return pipe is disposed at the top of the water storage barrel.

6. The shaft seal cooling water supply device according to claim 1, further comprising a water level monitor connected to the reservoir for detecting the cooling water content in the reservoir.

7. The shaft seal cooling water supply device according to claim 1, further comprising a water quality detector disposed inside the water storage bucket for detecting a degree of contamination of the cooling water in the water storage bucket.

8. The shaft seal cooling water supply device according to claim 1, wherein a pressurizing member is further provided in the water storage tank, and the pressurizing member is used for increasing the water pressure of the cooling water.

9. The shaft seal cooling water supply device according to claim 2, further comprising a water tank, wherein the main water replenishing pipe is connected to the water tank, and the cross-sectional area of the sub water replenishing pipe is half of the cross-sectional area of the main water replenishing pipe.

10. A shaft seal cooling system, characterized in that, includes the shaft seal cooling water supply device, the shaft seal and the pump according to any one of claims 1-9, the shaft seal is disposed on the pump, the shaft seal cooling water supply device is connected with the shaft seal to provide cooling water for the shaft seal.

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