Cooling water system device for screw vacuum pump

Abstract

The utility model provides a cooling water system device for a screw vacuum pump, the cooling water system device comprises a screw pump set, a heat exchanger and a water supply device, one end of the screw pump set is connected to the water outlet end of a first distributor, and the other end of the screw pump set is connected to the water inlet end of a second distributor; the water inlet end of the first distributor is connected with the water supply device through a pipeline, and the water outlet end of the second distributor is sequentially connected with the heat exchanger and the water supply device through pipelines. By limiting the structure of the cooling water system device, the scaling phenomenon of the screw vacuum pump in the operation process can be prevented, the screw vacuum pump can be cooled, effective cooling is achieved, over-temperature operation of the screw vacuum pump is prevented, the maintenance period of the screw vacuum pump is prolonged, and therefore the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cooling water system technical field relates to a kind of cooling water system device for screw vacuum pump. BACKGROUND

[0002] At present, vacuum refining furnace will adopt mechanical pump to carry out vacuum extraction, and the mechanical pump group is set to a three-stage Roots vacuum pump and a one-stage screw vacuum pump, which forms a mechanical pump group (the screw pump temperature is greater than 50 DEG C to alarm, and the temperature is greater than 60 DEG C to stop running). The mechanical pump group needs to use water as the pump body for heat exchange and cooling. At present, the cooling water of the mechanical pump group is completed by equipment water. Since the average temperature of the screw vacuum pump during operation is 55 DEG C, the cooling channel in the pump body is scaled, which causes the cooling water to be blocked, resulting in no heat exchange, operation alarm and affecting production.

[0003] The prior art discloses a small-size dry vacuum pump device, which comprises a high-efficiency cooling unit of a coolant of cooling water, the cooling unit is used for cooling a large-current circuit component represented by a switching component of a frequency converter with a high self-heating value; a dry vacuum pump comprising a pump unit and a motor for driving the pump unit; a frequency converter for converting alternating current from an alternating current power supply into alternating current with a predetermined frequency and supplying the alternating current to the motor; an electrical equipment housing accommodating a control circuit assembly including the frequency converter in the inside thereof; a pump housing accommodating the dry vacuum pump and an operation monitoring sensor of the dry vacuum pump in the inside thereof; a liquid-cooled partition provided between the electrical equipment housing and the pump housing and having a circulating coolant in the inside thereof; and an outer shell accommodating the electrical equipment housing, the pump housing and the liquid-cooled partition in the inside thereof and serving as an integrated structure.

[0004] The prior art discloses a dry double-screw vacuum pump cooling device, which comprises a cooling liquid tank, a vacuum pump and a frequency converter. The cooling liquid outlet pipeline of the cooling liquid tank is divided into at least two routes after passing through a cooling liquid pump. One route is connected with a jacket cooling liquid injection inlet on the vacuum pump, and the other route is connected with a shaft cooling liquid injection inlet on the vacuum pump. The jacket cooling liquid outlet and the shaft cooling liquid outlet on the vacuum pump are connected with the pipe passage inlet of the frequency converter through pipelines.

[0005] However, the prior art still has problems that the equipment water is easy to scale in the pump body, the cooling effect is not good, the cooling water in the pump body is easy to be blocked, and the service life is not long. Therefore, it is urgent to design a cooling water system device for screw vacuum pump to overcome the defects of the prior art and meet the actual application requirements. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model discloses a cooling water system device for screw vacuum pump, especially relates to a novel cooling water system of VD furnace screw vacuum pump.

[0007] To achieve this purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides a cooling water system device for screw vacuum pump, cooling water system device includes screw pump group, heat exchanger and water supply device, one end of screw pump group is connected to the water outlet end of first distributor, and the other end is connected to the water inlet end of second distributor,

[0009] The water inlet end pipeline of first distributor is connected with water supply device, and the water outlet end of second distributor is sequentially connected with heat exchanger and water supply device.

[0010] In the utility model, through the structure limitation of cooling water system device, can prevent the fouling phenomenon of screw vacuum pump during the operation, so that the screw vacuum pump can be cooled, effectively cooling is reached, the overtemperature operation of screw vacuum pump is prevented, the maintenance cycle of screw vacuum pump is prolonged, and the maintenance cost is reduced.

[0011] It is to be explained that the utility model does not specially limit the specific model, structure and the like of screw pump group, heat exchanger, water supply device, first distributor and second distributor, and the person skilled in the art can adaptively adjust and select according to the actual situation.

[0012] It is to be explained that the cooling water of cooling water system device in the utility model is desalted water, can solve the fouling problem of pump body pipeline, utilizes the plate heat exchanger to cool cooling water, and the coolant water adopts clean circulating water (water temperature 25~30 DEG C), sets up circulating water pump, guarantees water supply pressure and flow, and sets up automatic switching function, and the whole cooling water system device can be configured complete control function, can realize the functions of remote monitoring and remote control of operating personnel.

[0013] It is to be explained that the desalted water in the utility model refers to the finished water obtained after removing suspended matter, colloid and inorganic cation, anion and other impurities in water by various water treatment processes, and the clean circulating water refers to the circulating water after treatment, which is used for closed loop circulation of cooling equipment, and the turbidity of clean circulating water is low, and after filtration and treatment, suspended matter, particulate matter and other impurities are removed, and high cleanliness is maintained.

[0014] Exemplarily, the operation parameter of the cooling water system device in the utility model can be:

[0015] Water quality requirement: PH value is 6.5 3 ; suspended solid quantity is less than or equal to 20 PPM; solid particle maximum size is less than or equal to 20 μm; ferromagnetic particle quantity is less than or equal to 0.5 PPM; ferromagnetic particle maximum size is less than or equal to 5 μm; cooling water hardness is less than or equal to 10 PPM, and when the gravity water temperature is 42 DEG C, it should be lower than the saturation of calcium carbonate; the supply water temperature of cooling water temperature is highest 40 DEG C, so that the water does not freeze; the refrigerant water flow can be 25 m 3 / h, the desalted water flow can be 15 m 3 / h, and the desalted water pressure can be 0.71 MPa, so that the average temperature of the screw pump set is 36 DEG C, which is 19 DEG C lower than the existing operation temperature.

[0016] As a preferred technical scheme of the utility model, the screw pump set comprises a plurality of screw vacuum pumps, and the plurality of screw vacuum pumps are connected in parallel.

[0017] It should be noted that the utility model does not specially limit the specific model, structure and quantity of the screw vacuum pump, and the person skilled in the art can make adaptive adjustment and selection according to the actual situation. The plurality of screw vacuum pumps can be 1, 2, 3, 4, 5, 6, 7, 8, etc., which are not exhausted here.

[0018] As a preferred technical scheme of the utility model, a plurality of water outlets are arranged on the first distributor, and the plurality of water outlets are arranged corresponding to the water inlets of the plurality of screw vacuum pumps.

[0019] It should be noted that the plurality of water outlets can be 1, 2, 3, 4, 5, 6, 7, 8, etc., which are not exhausted here, and the expressions conforming to the relevant quantity fall within the protection scope of the utility model.

[0020] As a preferred technical scheme of the utility model, a plurality of water inlets are arranged on the second distributor, and the plurality of water inlets are arranged corresponding to the water outlets of the plurality of screw vacuum pumps.

[0021] It should be noted that the plurality of water inlets can be 1, 2, 3, 4, 5, 6, 7, 8, etc., which are not exhausted here, and the expressions conforming to the relevant quantity fall within the protection scope of the utility model.

[0022] As a preferred technical scheme of the utility model, the first distributor and the second distributor are the same.

[0023] It should be noted that the first distributor and the second distributor are the same in the utility model, which is more conducive to the control of water quantity, so that the water quantity in each screw vacuum pump is evenly distributed, and the internal passage of the screw vacuum pump is not blocked.

[0024] As a preferred technical scheme of the utility model, the heat exchanger is a plate heat exchanger.

[0025] It should be noted that the plate heat exchanger is adopted in the utility model, which has obvious advantages of smaller size, higher cooling efficiency, lower operation and maintenance cost, higher safety and the like compared with other heat exchange structures; the plate heat exchanger comprises the heat exchanger itself and a connected circulating water device, the water temperature can be controlled through the heat exchange of the plate heat exchanger, and then the internal passage of the screw vacuum pump is prevented from being blocked.

[0026] As a preferred technical scheme of the utility model, temperature detectors are arranged at the water inlet end and the water outlet end of the heat exchanger.

[0027] It should be noted that the temperature detectors are arranged at the water inlet end and the water outlet end of the heat exchanger, which is conducive to accurate measurement of the water temperature input into and output from the heat exchanger, and the water temperature in the screw vacuum pump is ensured, so that the passage in the screw vacuum pump is not blocked due to water icing.

[0028] As a preferred technical scheme of the utility model, the water supply device comprises a water supply tank and a water pump connected by pipelines.

[0029] It should be noted that the specific model, structure and the like of the water supply tank and the water pump are not specially limited in the utility model, and the skilled in the art can make adaptive adjustment and selection according to the actual situation.

[0030] Further, one end of the water supply tank is connected to the heat exchanger by a pipeline, and the other end is connected to the water pump.

[0031] Further, one end of the water pump away from the water supply tank is connected to the first distributor by a pipeline.

[0032] As a preferred technical scheme of the utility model, the water pump is provided with at least two, and the at least two water pumps are connected in parallel.

[0033] It should be noted that the water pump is provided with at least two in the utility model, for example, 2, 3, 4, 5, 6, 7, 8 and the like, which are not exhausted here, and the water pump is limited to two or more, which can realize one use and one standby, and realize the automatic switching function of the water pump in the running process, thereby prolonging the service life of the water pump.

[0034] As a preferred technical scheme of the utility model, the water pump is further provided with a branch pipeline at one end away from the water supply tank, and the branch pipeline is connected to the water supply tank at an end away from the water pump.

[0035] Further, the branch pipeline is provided with a pressure regulating assembly.

[0036] It should be noted that the pressure regulating assembly in the utility model can include a pressure gauge, a regulating valve and other structures to realize the pressure regulating function of the branch pipeline, realize single-pump single-valve control, facilitate maintenance operation and facilitate flow regulation.

[0037] It should be noted that the specific fittings on each pipeline and the branch pipeline are not limited in the utility model, and the pressure regulating assembly, liquid level meter, filtering assembly, temperature detector and functional valve can be arranged at the water outlet or water inlet of each pipeline, and the person skilled in the art can make corresponding adjustment or selection according to the actual situation.

[0038] The system device refers to a device system, a device system or a production device.

[0039] Compared with the prior art, the utility model has the beneficial effects that:

[0040] In the utility model, by limiting the structure of the cooling water system device, the fouling phenomenon of the screw vacuum pump during operation can be prevented, the screw vacuum pump can be cooled, effective cooling is achieved, over-temperature operation of the screw vacuum pump is prevented, the maintenance period of the screw vacuum pump is prolonged, and the maintenance cost is reduced BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 The structure diagram of the cooling water system device for the screw vacuum pump is provided for a specific embodiment of the utility model;

[0042] Among them, 1- screw vacuum pump;2- first distributor;3- second distributor;4- heat exchanger;5- water supply tank;6- water pump;7- pressure regulating assembly. CONCRETE IMPLEMENTATION

[0043] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0044] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] In one specific embodiment, the present invention provides a cooling water system device for a screw vacuum pump 1, such as... Figure 1 As shown, the cooling water system includes a screw pump set, a heat exchanger 4, and a water supply device. One end of the screw pump set is connected to the outlet of the first distributor 2, and the other end is connected to the inlet of the second distributor 3. The inlet of the first distributor 2 is connected to the water supply device, and the outlet of the second distributor 3 is connected to the heat exchanger 4 and the water supply device in sequence.

[0047] It should be noted that this utility model does not impose any special limitations on the specific models, structures, etc. of the screw pump set, heat exchanger 4, water supply device, first distributor 2 and second distributor 3. Those skilled in the art can make adaptive adjustments and selections according to the actual situation.

[0048] It should be noted that the cooling water system device in the utility model adopts cooling water as desalted water, which can solve the problem of pump body pipeline fouling, and the cooling water is cooled by using a plate heat exchanger, the cooling water uses clean circulating water (water temperature 25-30 DEG C), a circulating water pump is arranged to ensure water supply pressure and flow, and an automatic switching function is arranged, so that the cooling water system device as a whole can be configured with complete control function, and remote monitoring and remote control functions of an operator can be realized.

[0049] It should be noted that the desalted water in the utility model refers to finished water obtained by removing suspended solids, colloids and inorganic cations, anions and other impurities in water by using various water treatment processes; and the clean circulating water refers to circulating water after treatment, which is used for closed loop circulation of cooling equipment, and the turbidity of the clean circulating water is low, and the suspended solids, particulate matter and other impurities are removed after filtration and treatment, so that the clean circulating water can maintain high cleanliness.

[0050] Exemplarily, the operating parameters of the cooling water system device in the utility model can be as follows:

[0051] Water quality requirements: PH value is 6.5<PH<8.5, conductivity is less than or equal to 50 us / cm at 25 DEG C 3 ; suspended solid quantity is less than or equal to 20 PPM; solid particle maximum size is less than or equal to 20 um; ferromagnetic particle quantity is less than or equal to 0.5 PPM; ferromagnetic particle maximum size is less than or equal to 5 um; hardness of cooling water is less than or equal to 10 PPM, and at 42 DEG C, the gravity water temperature should be lower than the saturation degree of calcium carbonate; the supply water temperature of the cooling water is highest at 40 DEG C, so that the water does not freeze; the cooling water flow can be 25 m 3 / h, the desalted water flow can be 15 m 3 / h, and the desalted water pressure can be 0.71 MPa; by limiting the operating parameters, the average operating temperature of the screw pump set can be 36 DEG C, which is 19 DEG C lower than the existing operating temperature.

[0052] In one embodiment, the screw pump set comprises a plurality of screw vacuum pumps 1, and the plurality of screw vacuum pumps 1 are connected in parallel.

[0053] It should be noted that the specific model, structure and quantity of the screw vacuum pump 1 are not specially limited in the utility model, and a person skilled in the art can make adaptive adjustment and selection according to the actual situation. The plurality of screw vacuum pumps 1 can be 1, 2, 3, 4, 5, 6, 7, 8, etc., which are not exhausted here.

[0054] In one embodiment, a plurality of water outlets are arranged on the first distributor 2, and the plurality of water outlets correspond to the water inlets of the plurality of screw vacuum pumps 1.

[0055] It should be noted that the number of water inlets can be 1, 2, 3, 4, 5, 6, 7, 8, etc., which is not exhausted here, and the expressions conforming to the relevant quantities are within the protection scope of the utility model.

[0056] In an embodiment, a plurality of water inlets are provided on the second distributor 3, which correspond to the water outlets of the plurality of screw vacuum pumps 1.

[0057] It should be noted that the number of water inlets can be 1, 2, 3, 4, 5, 6, 7, 8, etc., which is not exhausted here, and the expressions conforming to the relevant quantities are within the protection scope of the utility model.

[0058] In an embodiment, the first distributor 2 and the second distributor 3 are the same.

[0059] It should be noted that the first distributor 2 and the second distributor 3 in the utility model are the same, which can be more conducive to the control of water quantity, so that the water quantity in each screw vacuum pump 1 is evenly distributed, which is conducive to the internal passage of the screw vacuum pump 1 without blocking.

[0060] In an embodiment, the heat exchanger 4 is a plate heat exchanger.

[0061] In an embodiment, the water inlet and the water outlet of the heat exchanger 4 are provided with temperature detectors.

[0062] It should be noted that the water inlet and the water outlet of the heat exchanger 4 in the utility model are provided with temperature detectors, which can be conducive to accurate measurement of the water temperature input and output to the heat exchanger 4, and the water temperature entering the screw vacuum pump 1 is guaranteed, so that the passage in the screw vacuum pump 1 is not blocked by ice.

[0063] In an embodiment, the water supply device includes a water supply tank 5 and a water pump 6 connected by pipelines.

[0064] It should be noted that the specific model, structure, etc. of the water supply tank 5 and the water pump 6 are not specially limited in the utility model, and those skilled in the art can make adaptive adjustment and selection according to the actual situation.

[0065] In an embodiment, one end of the water supply tank 5 is connected to the heat exchanger 4 by a pipeline, and the other end is connected to the water pump 6.

[0066] In an embodiment, the water pump 6 is connected to the first distributor 2 by a pipeline away from the water supply tank 5.

[0067] In an embodiment, the water pump 6 is provided with at least two, and the at least two water pumps 6 are connected in parallel.

[0068] It should be noted that the water pump 6 is provided with at least two, for example, can be 2, 3, 4, 5, 6, 7, 8, etc., not here to do the enumeration.

[0069] In one embodiment, the water pump 6 is also provided with a branch pipeline away from one end of the water supply tank 5, and the other end of the branch pipeline is connected to the water supply tank 5.

[0070] In one embodiment, the branch pipeline is provided with a pressure regulating assembly 7.

[0071] It should be noted that the specific fittings on each pipeline and branch pipeline are not limited, and the pressure regulating assembly 7, liquid level meter, filter assembly, temperature detector and function valve can be provided at the water outlet or water inlet of each pipeline, and the person skilled in the art can make corresponding adjustment or selection according to the actual situation.

[0072] Example 1

[0073] The embodiment provides a cooling water system device for a screw vacuum pump 1, wherein:

[0074] The cooling water system device comprises a screw pump group, a heat exchanger 4 and a water supply device, one end of the screw pump group is connected to the water outlet end of the first distributor 2, and the other end is connected to the water inlet end of the second distributor 3; the water inlet end of the first distributor 2 is connected to the water supply device, and the water outlet end of the second distributor 3 is sequentially connected to the heat exchanger 4 and the water supply device.

[0075] The screw pump group comprises seven screw vacuum pumps 1, and the seven screw vacuum pumps 1 are connected in parallel. The first distributor 2 is provided with seven water outlet ends, and the seven water outlet ends are provided corresponding to the water inlet ends of the seven screw vacuum pumps 1. The second distributor 3 is provided with seven water inlet ends, and the seven water inlet ends are provided corresponding to the water outlet ends of the seven screw vacuum pumps 1. The first distributor 2 and the second distributor 3 are the same.

[0076] The heat exchanger 4 is a plate heat exchanger, and the temperature detector is arranged at the water inlet end and the water outlet end of the heat exchanger 4.

[0077] The water supply device comprises a water supply tank 5 and a water pump 6 connected by a pipeline, one end of the water supply tank 5 is connected to the heat exchanger 4 by a pipeline, and the other end is connected to the water pump 6. The water pump 6 is connected to the first distributor 2 by a pipeline away from the water supply tank 5.

[0078] The water pump 6 is provided with two, and the two water pumps 6 are connected in parallel, and the water pump 6 is also provided with a branch pipeline away from one end of the water supply tank 5, and the other end of the branch pipeline is connected to the water supply tank 5, and the branch pipeline is provided with a pressure regulating assembly 7.

[0079] In summary, the utility model discloses the structure limitation to cooling water system device, can prevent the screw vacuum pump 1 from appearing the scale phenomenon in the operation process, makes the screw vacuum pump 1 can cool, reaches effective cooling, prevents the screw vacuum pump 1 from overtemperature operation, prolongs the maintenance cycle of screw vacuum pump 1 to reduce the maintenance cost.

[0080] The above merely describes the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, and the skilled person in the art should understand that any change or replacement that the skilled person in the art can easily think of within the technical range disclosed by the utility model falls within the protection scope and the disclosed range of the utility model.

Claims

1. A cooling water system device for a screw vacuum pump, characterized in that, The cooling water system device comprises a screw pump group, a heat exchanger and a water supply device, one end of the screw pump group is connected to a water outlet end of a first distributor, and the other end is connected to a water inlet end of a second distributor; A water inlet end pipeline of the first distributor is connected to the water supply device, and a water outlet end of the second distributor is sequentially connected to the heat exchanger and the water supply device.

2. The cooling water system device for a screw vacuum pump according to claim 1, characterized by The screw pump group comprises a plurality of screw vacuum pumps, and the plurality of screw vacuum pumps are connected in parallel.

3. The cooling water system device for a screw vacuum pump according to claim 2, characterized in that, A plurality of water outlet ends are arranged on the first distributor, and the plurality of water outlet ends correspond to water inlet ends of the plurality of screw vacuum pumps.

4. Cooling water system arrangement for a screw vacuum pump according to claim 2 or 3, characterized in that A plurality of water inlet ends are arranged on the second distributor, and the plurality of water inlet ends correspond to water outlet ends of the plurality of screw vacuum pumps.

5. The cooling water system apparatus for a screw vacuum pump according to claim 1, characterized by The first distributor and the second distributor are the same.

6. The cooling water system apparatus for a screw vacuum pump according to claim 1, characterized by The heat exchanger is a plate heat exchanger.

7. The cooling water system apparatus for a screw vacuum pump according to claim 1, characterized by Temperature detectors are arranged at water inlet ends and water outlet ends of the heat exchanger.

8. The cooling water system apparatus for a screw vacuum pump according to claim 1, characterized by The water supply device comprises a water supply tank and a water pump connected by a pipeline; One end of the water supply tank is connected to the heat exchanger by a pipeline, and the other end is connected to the water pump; One end of the water pump away from the water supply tank is connected to the first distributor by a pipeline.

9. The cooling water system device for a screw vacuum pump according to claim 8, characterized in that, The water pump is provided with at least two, and the at least two water pumps are connected in parallel.

10. The cooling water system apparatus for a screw vacuum pump according to claim 8, characterized by One end of the water pump away from the water supply tank is further provided with a branch pipeline, and the other end of the branch pipeline away from the water pump is connected to the water supply tank; A pressure adjusting assembly is arranged on the branch pipeline.

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