A multipurpose intelligent pump set

Abstract

The application relates to a multipurpose intelligent pump group, which comprises a water pump and a vacuum unit. The water pump comprises a pump body with a first inner cavity, a first circulating cavity and a first mechanical seal seat, a pump cover with a second inner cavity, a second circulating cavity and a second mechanical seal seat, and is provided with a cold water discharge port, a circulating port and a mechanical seal inlet. The vacuum unit comprises a base, a liquid ring vacuum pump, a vacuum buffer tank, a cold water buffer tank, a compressed air buffer tank, a steam-water separation tank, a tube heat exchanger, a plate heat exchanger and a control box which are connected through pipelines. The control box is provided with a power module and a control unit for automatic control. The multipurpose intelligent pump group can automatically inject water and has no other leakage points.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water pump, in particular to a multipurpose intelligent pump set. BACKGROUND

[0002] Water pump, a mechanical device for conveying liquid or pressurizing liquid, it will give the external kinetic energy to the liquid, so that the energy of the liquid flow increases. According to the structure of the water pump, it can be divided into centrifugal, plunger, diaphragm and so on; The liquid transported by the water pump is not only water, but also oil, acid liquid, alkali liquid, emulsion, suspension, and even liquid metal liquid. The main parameters of the water pump include: head, flow, power. At present, the water pump mainly adopts centrifugal structure, because the water pump with centrifugal structure can change the head, flow by simple processing impeller, and the power is determined by the driving device of the input shaft. Therefore, the application of centrifugal water pump is more suitable for the actual requirements.

[0003] After the water pump stops, the liquid in the inlet pipeline flows back due to gravity, causing the liquid in the pump cavity to flow back and enter the air. At this time, the water pump will not be pumped out when it is started again, and at the same time, the damage of the mechanical seal will also be caused due to the lack of liquid cooling. Therefore, water needs to be added before the water pump starts. The most common way to add water is self-filling, that is, filling the water pump and inlet pipe with water.

[0004] However, the water pump with frequent start-stop still has the following shortcomings by using the self-filling method to add water:

[0005] 1. Long self-filling time;

[0006] 2. Complicated operation;

[0007] 3. The frequent opening and closing of the self-filling port will reduce the sealing performance and cause water leakage. SUMMARY

[0008] In order to solve the technical problems in the background art, the present application provides a multipurpose intelligent pump set, which can automatically add water and has no other leakage points.

[0009] The technical scheme adopted by the present application is:

[0010] A multipurpose intelligent pump set, comprising: a water pump, a vacuum unit.

[0011] The water pump comprises a sealingly connected pump body and a pump cover, the pump body is provided with a first inner cavity, a first circulating cavity and a first mechanical seal seat, the pump cover is provided with a second inner cavity, a second circulating cavity and a second mechanical seal seat, the first inner cavity and the second inner cavity are used to accommodate an impeller, the first circulating cavity and the second circulating cavity are connected in communication, the first mechanical seal seat and the second mechanical seal seat are used to install a mechanical seal static ring, the pump cover is provided with a cold water discharge port in communication with the second inner cavity, a circulating port in communication with the second circulating cavity and a mechanical seal inlet in communication with the second mechanical seal seat.

[0012] The vacuum unit comprises:

[0013] The frame base is fixedly provided with a liquid ring vacuum pump, a vacuum buffer tank, a cold water buffer tank, a compressed air buffer tank, a steam-water separation tank, a tube heat exchanger, a plate heat exchanger and a control box.

[0014] The gas suction port of the liquid ring vacuum pump is connected to the vacuum buffer tank, the vacuum buffer tank is connected to the cold water discharge port, the gas discharge port of the liquid ring vacuum pump is connected to the steam-water separation tank, the water outlet of the steam-water separation tank is connected to the tube inlet of the tube heat exchanger, the tube outlet of the tube heat exchanger is connected to the hot inlet of the plate heat exchanger, the cold water buffer tank is connected to the cold water outlet of the plate heat exchanger, the cold water buffer tank is connected to the cold water inlet of the liquid ring vacuum pump, the gas outlet of the steam-water separation tank is connected to the compressed air buffer tank, the compressed air buffer tank is connected to the shell inlet of the tube heat exchanger, and the refrigerant inlet of the plate heat exchanger is connected to the circulating water system.

[0015] The control box is provided with a power module and a control unit for automatic control.

[0016] Further, the circulating port is provided with two groups and is connected to the communication pipeline between the refrigerant outlet of the plate heat exchanger and the circulating water system.

[0017] The plate heat exchanger is provided with a four-way valve connected to the refrigerant inlet, and the four-way valve is electrically connected to the control unit.

[0018] Further, the first check valve is connected to the gas suction port of the liquid ring vacuum pump.

[0019] The second check valve is connected to the gas discharge port of the liquid ring vacuum pump.

[0020] Further, the vacuum cut-off valve is connected to the connection pipeline between the vacuum buffer tank and the first check valve, and the vacuum cut-off valve is electrically connected to the control unit.

[0021] Further, the cold water cut-off valve is connected to the connection pipeline between the cold water buffer tank and the second check valve, and the cold water cut-off valve is electrically connected to the control unit.

[0022] Further, a separation gas cut-off valve is arranged on the connecting pipeline of the compressed air buffer tank and the steam-water separation tank, and the separation gas cut-off valve is electrically connected with the control unit.

[0023] An exhaust cut-off valve is arranged on the connecting pipeline of the compressed air buffer tank and the column-pipe air cooler, and the exhaust cut-off valve is electrically connected with the control unit.

[0024] A safety valve is arranged on the compressed air buffer tank.

[0025] Further, a liquid level meter is arranged on one side of the vacuum buffer tank, and the liquid level meter is electrically connected with the control unit.

[0026] Further, a three-way valve is arranged on the connecting pipeline of the vacuum buffer tank and the cold water discharge port, the three-way valve is electrically connected with the control unit, and is connected with the mechanical seal inlet.

[0027] Further, a blowdown port is arranged on the bottom of the vacuum buffer tank and the compressed air buffer tank, respectively.

[0028] Further, the control unit in the control box is a programmable logic controller, and comprises:

[0029] A CPU module is used to set and run an automatic program.

[0030] A power module is electrically connected with the power module.

[0031] An analog quantity acquisition module is used to process the signal of the liquid level meter.

[0032] A digital quantity input module is used to control the opening and closing of the vacuum cut-off valve, the separation gas cut-off valve, the exhaust cut-off valve and the cold water cut-off valve, and the switching of the four-way valve and the three-way valve.

[0033] A communication module is used to realize remote detection and control.

[0034] The multipurpose intelligent pump set has the following advantages:

[0035] 1. The water is pumped into the pump cavity by the liquid ring vacuum pump to realize self-filling.

[0036] 2. The water injection condition in the pump cavity of the water pump is determined by the liquid level meter.

[0037] 3. The circulating water in the first and second circulating cavities is cooled by the first and second inner cavities of the impeller cavity of the water pump.

[0038] 4. The switching between external cooling and self-cooling is realized by the four-way valve. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the specific embodiments of the present application, the following will be a brief description of the drawings needed in the specific embodiments, the following description of the drawings is an embodiment of the present application.

[0040] Figure 1 is a general perspective view of a multipurpose intelligent pump set provided by the present application;

[0041] Figure 2 is a perspective view of the mounting mechanism of a multipurpose intelligent pump set provided by the present application;

[0042] Figure 3 is an exploded perspective view of the pin storage mechanism of a multipurpose intelligent pump set provided by the present application;

[0043] Figure 4 is a perspective view of the pushing mechanism of a multipurpose intelligent pump set provided by the present application;

[0044] Figure 5 is a perspective view of the pin clamping mechanism of a multipurpose intelligent pump set provided by the present application;

[0045] Figure 6 is a perspective view of the driving arm of a multipurpose intelligent pump set provided by the present application.

[0046] In the figure:

[0047] 1, water pump,

[0048] 11, pump body, 111, first inner cavity, 112, first circulating cavity, 113, first mechanical seal seat,

[0049] 12, pump cover, 121, second inner cavity, 122, second circulating cavity, 123, second mechanical seal seat, 124, cold water discharge port, 125, mechanical seal inlet, 126, circulating port,

[0050] 2, base,

[0051] 3, liquid ring vacuum pump,

[0052] 41, vacuum buffer tank, 42, cold water buffer tank, 43, compressed air buffer tank,

[0053] 5, steam-water separation tank,

[0054] 6, finned air cooler,

[0055] 7, plate heat exchanger,

[0056] 8, control box,

[0057] 90. Four-way valve; 91. First check valve; 92. Second check valve; 93. Vacuum shut-off valve; 94. Separating gas shut-off valve; 95. Exhaust shut-off valve; 96. Level gauge; 97. Cold water shut-off valve; 98. Safety valve; 99. Three-way valve. Detailed Implementation

[0058] To more clearly and explicitly illustrate the specific objectives and implementation methods of this invention, a complete description of the technical solution of this invention will be provided below. The described embodiments are only a part of the embodiments of this invention, not all of them. Without creative effort, all other embodiments based on the embodiments described in this invention are within the protection scope of this invention.

[0059] This invention provides a multi-purpose intelligent pump set, such as... Figure 1 As shown, it includes: water pump 1 and vacuum unit.

[0060] The water pump 1, such as Figure 2 , Figure 3 As shown, the pump includes: a pump body 11 and a pump cover 12 connected in a sealed manner. The pump body 11 is provided with a first inner cavity 111, a first circulation cavity 112, and a first mechanical seal seat 113. The pump cover 12 is provided with a second inner cavity 121, a second circulation cavity 122, and a second mechanical seal seat 123. The first inner cavity 111 and the second inner cavity 121 are used to accommodate an impeller. The first circulation cavity 112 and the second circulation cavity 122 are connected. The first mechanical seal seat 113 and the second mechanical seal seat 123 are used to install a mechanical seal stationary ring. The pump cover 12 is provided with a cold water outlet 124 connected to the second inner cavity 121, a circulation port 126 connected to the second circulation cavity 122, and a mechanical seal inlet 125 connected to the second mechanical seal seat 123. Two sets of circulation ports 126 are provided and connected in series to the connecting pipe between the refrigerant outlet of the plate heat exchanger 7 and the circulating water system.

[0061] The vacuum unit, such as Figure 4 , Figure 5 As shown, it includes:

[0062] A frame-type base 2, on which a liquid ring vacuum pump 3, a vacuum buffer tank 41, a cold water buffer tank 42, a compressed air buffer tank 43, a steam-water separator 5, a shell-and-tube air cooler 6, a plate heat exchanger 7, and a control box 8 are fixedly installed.

[0063] The suction port of the liquid ring vacuum pump 3 is communicated to the vacuum buffer tank 41, the vacuum buffer tank 41 is communicated with the cold water discharge port 124, the exhaust port of the liquid ring vacuum pump 3 is communicated to the steam-water separation tank 5, the water outlet of the steam-water separation tank 5 is communicated to the tube side inlet of the tube type air cooler 6, the tube side outlet of the tube type air cooler 6 is communicated to the hot inlet of the plate heat exchanger 7, the hot outlet of the plate heat exchanger 7 is communicated to the cold water buffer tank 42, the cold water buffer tank 42 is communicated with the cold water port of the liquid ring vacuum pump 3, the gas outlet of the steam-water separation tank 5 is communicated to the compressed air buffer tank 43, the compressed air buffer tank 43 is communicated with the shell side inlet of the tube type air cooler 6, the refrigerant port of the plate heat exchanger 7 is communicated with the circulating water system, the vacuum buffer tank 41 is provided with a liquid level meter 96 on one side, and the vacuum buffer tank 41 and the compressed air buffer tank 43 are respectively provided with a blowdown port.

[0064] A plurality of valves are arranged on the above-mentioned connecting pipeline, including:

[0065] A four-way valve 90 is arranged at the refrigerant port of the plate heat exchanger 7;

[0066] A first check valve 91 is arranged at the suction port of the liquid ring vacuum pump 3;

[0067] A second check valve 92 is arranged at the exhaust port of the liquid ring vacuum pump 3;

[0068] A vacuum cut-off valve 93 is arranged on the connecting pipeline of the vacuum buffer tank 41 and the first check valve 91;

[0069] A cold water cut-off valve 97 is arranged on the connecting pipeline of the cold water buffer tank 42 and the second check valve 92;

[0070] A separation gas cut-off valve 94 is arranged on the connecting pipeline of the compressed air buffer tank 43 and the steam-water separation tank 5;

[0071] An exhaust gas cut-off valve 95 is arranged on the connecting pipeline of the compressed air buffer tank 43 and the tube type air cooler 6;

[0072] A safety valve 98 is arranged on the compressed air buffer tank 43;

[0073] A three-way valve 99 is arranged on the connecting pipeline of the vacuum buffer tank 41 and the cold water discharge port 124, the three-way valve 99 is electrically connected with a control unit and is communicated with the mechanical seal inlet 125.

[0074] The control box 8 is provided with a power module and a control unit for realizing automatic control, the control unit is a programmable logic controller and includes:

[0075] A CPU module for setting and running an automatic program;

[0076] A power module, which is electrically connected with the power module;

[0077] An analog quantity acquisition module, which is electrically connected with the liquid level meter 96, and is used to process the signal of the liquid level meter 96;

[0078] A digital quantity input module, which is electrically connected with the vacuum cut-off valve 93, the separation gas cut-off valve 94, the exhaust cut-off valve 95, the cold water cut-off valve 97, the four-way valve 90 and the three-way valve 99 respectively, and is used to control the opening and closing of the vacuum cut-off valve 93, the separation gas cut-off valve 94, the exhaust cut-off valve 95 and the cold water cut-off valve 97 respectively, and the switching of the four-way valve 90 and the three-way valve 99;

[0079] A communication module, which is used to realize remote detection and control.

[0080] According to the specific structure of one of the multipurpose intelligent pump groups in the above embodiments, as shown in the figure, the working method thereof is further described as follows: Figure 6

[0081] A, priming:

[0082] The control unit controls: the cold water cut-off valve 97 is opened, the four-way valve 90 is switched to connect the inlet and outlet of the plate heat exchanger 7, the three-way valve 99 is switched to connect the vacuum buffer tank 41 and the cold water discharge port 124, and the liquid ring vacuum pump 3 is started. At this time, the cold water in the cold water buffer tank 42 is circulated and provides cold water for the liquid ring of the liquid ring vacuum pump 3. The air in the water pump 1 is pumped into the vacuum buffer tank 41, and when the air is pumped and the priming is completed, the liquid level meter 96 reaches the set threshold value.

[0083] Among them, the control unit controls: the separation gas cut-off valve 94 is opened, and the exhaust cut-off valve 95 is intermittently opened and closed, so as to realize the liquid ring cold water of the liquid ring vacuum pump 3 through air cooling.

[0084] B, starting the water pump:

[0085] After the above priming step is completed, the control unit controls the motor of the water pump 1 to start, and the water pump 1 is started.

[0086] C, switching of mechanical seal cooling:

[0087] The control unit controls: the three-way valve 99 is switched to connect the cold water discharge port 124 and the mechanical seal inlet 125, the cold water discharge port 124 is located outside the impeller, and the mechanical seal inlet 125 is located at the center of the impeller shaft, so that a pressure difference is generated between the two and the mechanical seal is washed and cooled by the water in the water pump 1.

[0088] C, switching of circulating water:

[0089] The water pump 1 is normally operated, and the vacuum is needed in other processes. ​

[0090] The control unit controls: the separation gas cut-off valve 94 is closed, the exhaust cut-off valve 95 is closed, the four-way valve 90 is switched to the plate heat exchanger 7 being communicated with the circulating water system, the three-way valve 99 is switched to the cold water discharge port 124 being communicated with the mechanical seal inlet 125, the liquid ring of the vacuum pump 3 is cooled by the circulating water system, at the same time, the cold water outlet of the plate heat exchanger 7 is first connected to the circulating port 126 to enter the first circulating cavity 112 and the second circulating cavity 122, and the circulating water is cooled by the first inner cavity 111 and the second inner cavity 121 where the impeller is located through heat conduction, and then returned to the circulating water system, so as to reduce the load of the circulating water system.

[0091] Based on the above, the embodiment of the multipurpose intelligent pump set is used as an example, and through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A multi-purpose intelligent pump set, characterized in that it comprises: a water pump (1) and a vacuum unit, wherein the water pump (1) comprises a sealingly connected pump body (11) and a pump cover (12), the pump body (11) is provided with a first inner cavity (111), a first circulating cavity (112) and a first mechanical seal seat (113), the pump cover (12) is provided with a second inner cavity (121), a second circulating cavity (122) and a second mechanical seal seat (123), the first inner cavity (111) and the second inner cavity (121) are used to accommodate an impeller, the first circulating cavity (112) and the second circulating cavity (122) are connected in communication, the first mechanical seal seat (113) and the second mechanical seal seat (123) are used to install a mechanical seal static ring, the pump cover (12) is provided with a cold water discharge port (124) in communication with the second inner cavity (121), a circulating port (126) in communication with the second circulating cavity (122) and a mechanical seal inlet (125) in communication with the second mechanical seal seat (123) in penetration, and the circulating port (126) is provided with two groups; and the vacuum unit comprises a frame base (2), and the base (2) is fixedly provided with a liquid ring vacuum pump (3), a vacuum buffer tank (41), a cold water buffer tank (42), a compressed air buffer tank (43), a steam-water separation tank (5), a tube-in-tube air cooler (6), a plate heat exchanger (7) and a control box (8).

2. The multi-purpose intelligent pump set according to claim 1, characterized in that the water pump (1) is a single-suction centrifugal pump.

3. The multi-purpose intelligent pump set according to claim 1, characterized in that the water pump (1) is provided with a first inlet (13) and a second inlet (14) on the pump body (11), and the first inlet (13) and the second inlet (14) are connected to the first inner cavity (111) and the second inner cavity (121) respectively.

4. The multi-purpose intelligent pump set according to claim 1, characterized in that the water pump (1) is provided with a first outlet (15) and a second outlet (16) on the pump cover (12), and the first outlet (15) and the second outlet (16) are connected to the first circulating cavity (112) and the second circulating cavity (122) respectively.

5. The multi-purpose intelligent pump set according to claim 1, characterized in that the water pump (1) is provided with a first mechanical seal (17) and a second mechanical seal (18) on the pump cover (12), and the first mechanical seal (17) and the second mechanical seal (18) are connected to the first mechanical seal seat (113) and the second mechanical seal seat (123) respectively.

6. The multi-purpose intelligent pump set according to claim 1, characterized in that the water pump (1) is provided with a first shaft (21) and a second shaft (22) on the pump body (11), and the first shaft (21) and the second shaft (22) are connected to the first inner cavity (111) and the second inner cavity (121) respectively.

7. The multi-purpose intelligent pump set according to claim 1, characterized in that the water pump (1) is provided with a first shaft seal (23 The suction port of the liquid ring vacuum pump (3) is communicated with a first check valve (91) and is communicated to the vacuum buffer tank (41), a vacuum cut-off valve (93) electrically connected with the control unit is arranged on the connecting pipeline of the vacuum buffer tank (41) and the first check valve (91), the vacuum buffer tank (41) is communicated with the cold water discharge port (124), a three-way valve (99) electrically connected with the control unit is arranged on the connecting pipeline of the vacuum buffer tank (41) and the cold water discharge port (124) and is communicated with the mechanical seal inlet (125); the exhaust port of the liquid ring vacuum pump (3) is communicated with a second check valve (92) and is communicated to the steam-water separation tank (5), a cold water cut-off valve (97) electrically connected with the control unit is arranged on the connecting pipeline of the cold water buffer tank (42) and the second check valve (92), a liquid level meter (96) electrically connected with the control unit is arranged on one side of the vacuum buffer tank (41); the water outlet of the steam-water separation tank (5) is communicated to the tube side inlet of the tube-in-cooled heat exchanger (6), the tube side outlet of the tube-in-cooled heat exchanger (6) is communicated to the hot inlet of the plate heat exchanger (7), the hot outlet of the plate heat exchanger (7) is communicated to the cold water buffer tank (42), the cold water buffer tank (42) is communicated with the cold water port of the liquid ring vacuum pump (3), the gas outlet of the steam-water separation tank (5) is communicated to the compressed air buffer tank (43), a separation gas cut-off valve (94) electrically connected with the control unit is arranged on the connecting pipeline of the compressed air buffer tank (43) and the steam-water separation tank (5), the compressed air buffer tank (43) is communicated with the shell side inlet of the tube-in-cooled heat exchanger (6), an exhaust cut-off valve (95) electrically connected with the control unit is arranged on the connecting pipeline of the compressed air buffer tank (43) and the tube-in-cooled heat exchanger (6), a safety valve (98) is arranged on the compressed air buffer tank (43); the refrigerant port of the plate heat exchanger (7) is communicated with a four-way valve (90) electrically connected with the control unit and is communicated with the circulating water system and the circulating port (126); The control box (8) is provided with a power module and a control unit for realizing automatic control.

2. The multipurpose intelligent pump group according to claim 1, characterized in that: The bottom of the vacuum buffer tank (41) and the compressed air buffer tank (43) is respectively communicated with a blowdown port.

3. The multipurpose intelligent pump group according to claim 2, characterized in that: The control unit in the control box (8) is a programmable logic controller, comprising: A CPU module for setting and running an automatic program; A power module electrically connected with the power module; An analog quantity acquisition module for processing the signal of the liquid level meter (96); A digital quantity input module for respectively controlling the opening and closing of the vacuum cut-off valve (93), the separation gas cut-off valve (94), the exhaust cut-off valve (95) and the cold water cut-off valve (97), and the switching of the four-way valve (90) and the three-way valve (99); A communication module for realizing remote detection and control.

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