CN111677670B

CN111677670B - Drainage water replenishing device for sequentially starting pump sets of water station

Info

Publication number: CN111677670B
Application number: CN202010566722.9A
Authority: CN
Inventors: 彭娜
Original assignee: Suzhou Batao Information Technology Co ltd
Current assignee: Shijiazhuang Jinggong Water Pump Co.,Ltd.
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-05-07
Anticipated expiration: 2040-06-19
Also published as: CN111677670A; CN113027774B; CN113027774A

Abstract

The invention relates to the technical field of water pumps, in particular to a sequential starting, draining and water replenishing device for a pump set of a water station, which comprises an impeller, a rotating shaft and an impeller box, wherein the impeller is arranged at the output end of a pump machine; the invention sets the sealing part on the rotating shaft into a separable form, when no liquid is fed, the sealing part is separated, the impeller rotates without overheating the sealing part, and simultaneously, the starting current can be reduced to reduce the fluctuation of a power grid, the power of the shaft is utilized to pump negative pressure in the impeller box, after the relative negative pressure is reached, water enters from the liquid inlet, then the separated sealing parts are jointed by the transmission part through the rising of the liquid level to realize sealing, and simultaneously, the air pumping channel and the negative pressure pumping device are closed to carry out normal drainage.

Description

Drainage water replenishing device for sequentially starting pump sets of water station

Technical Field

The invention relates to the technical field of water pumps, in particular to a drainage and water supplementing device for sequentially starting a pump set of a water station.

Background

With the rapid development of the urban construction in China, many suburbs and rural areas become towns. In urban construction, large land is hardened, ponds are filled, low-lying land which can bear rainwater originally is built into a community, and when a rainy season comes, cities are flooded frequently to cause disasters, so that the importance of waterlogging draining facilities is more and more prominent. The pump station is a device capable of providing hydraulic power and pneumatic power with certain pressure and flow, a plurality of centrifugal pumps are generally arranged in the pump station for draining water, when the waterlogging is drained, the centrifugal pumps of corresponding quantity are sequentially started according to needs, before the centrifugal pumps are started, water needs to be filled in the impeller cavity, so that negative pressure water suction is generated in the center when the impellers rotate, the existing water diversion equipment generally adopts manual irrigation or external water diversion equipment to automatically pump water, the water diversion equipment also needs to be stopped after the water is filled in the water diversion equipment and then the water pump is started, if one water diversion device corresponds to one water pump, the idle time of the water pumping device is long, the resource waste is caused, if one water diversion device corresponds to one group of water pumps, the starting speed is slow, the waterlogging draining requirements are difficult to meet, and an integrated control switch is also needed to be arranged in the starting process, so that the water diversion device is matched with the water pumps.

Disclosure of Invention

The invention aims to provide a drainage and water replenishing device for sequentially starting a pump set of a water station so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: drainage moisturizing device is started in order to water station pump package, including installing impeller, the pivot at the pump output and installing the impeller box at pump body front end, the impeller box is close to one side outside of pivot is equipped with the float box, the float box with inlet channel intercommunication is passed through to the impeller cavity in the impeller box, inlet channel is located the below of pivot, one side of float box be equipped with the negative pressure subassembly of taking out that the pivot transmission is connected, take out negative pressure subassembly with through pumping channel intercommunication between the impeller cavity in the impeller box, pumping channel is located the top of pivot, the pivot with through mechanical seal sealing connection between the impeller box, be equipped with in the float box and be used for control mechanical seal state and pumping channel switch on state's drive disk assembly.

The pump machine is the pump machine in the prior art, no improvement is made, a float box is arranged on the outer wall of one side, close to the pump machine, of an impeller box, the impeller box and the float box are separated, the float box surrounds the outer portion of a rotating shaft and a mechanical seal, a hole connected with the impeller box is formed in the lower portion of the float box, the float box can enter the float box when the water level in the impeller box rises, the float in the float box floats, and corresponding parts are driven to move after the float floats rise by utilizing the rising of the water level to control the matching state of the mechanical seal and the conduction state of an air suction channel, wherein a gear transmission mode and the like can be adopted between a negative pressure pumping component and the rotating shaft, the negative pressure pumping component can be a vacuum pump and the like in the prior art, when drainage is needed, the pump machine is directly opened, at the moment, the mechanical seal is a gap seal, the rotation of the rotating shaft can not enable the mechanical seal to be abraded to generate high heat, the water level in the impeller cavity is lower than the mechanical seal on the rotating shaft, the negative pressure pumping assembly pumps negative pressure into the impeller cavity through the air pumping channel until the air pressure in the impeller cavity is lower than a certain value, water enters the impeller cavity from the liquid inlet and gradually reaches the mechanical seal along with the rise of the water level, at the moment, the floater in the floater box floats, the mechanical seal is changed into contact seal from gap seal, the water is prevented from being poured in, the water is used for lubricating and cooling, at the moment, the negative pressure pumping assembly does not need to be pumped again, and the air pumping channel and the negative pressure pumping assembly are closed along with the float floating by utilizing a linkage part.

Preferably, mechanical seal includes dynamic seal portion and static seal portion, the connection of dynamic seal portion along axial activity is in the pivot, static seal portion is fixed on the impeller box, all install seal part on dynamic seal portion and the static seal portion, still be fixed with the carousel in the dynamic seal portion, the carousel is located the impeller intracavity, be equipped with the magnetism ring on the carousel.

The dynamic sealing part is arranged on the rotating shaft, the static sealing part is fixed on the impeller box, when the dynamic sealing part is in contact with the static sealing part, the dynamic sealing part is in contact with the sealing part on the static sealing part, the sealing part is made of ceramic materials, one side of the sealing part is provided with a rubber pad, so that a better sealing effect is achieved between the rotating shaft and the impeller box, the rotating shaft and the impeller box rotate relatively, the sealing part is easy to burn out under the condition that no water is used for lubricating and cooling, therefore, under the condition that no water is used, the dynamic sealing part and the static sealing part are in a separated state to form gap sealing, a rotating disc fixed with the dynamic sealing part can drive the dynamic sealing part to generate axial displacement, and then the mutual repulsion between the repulsive magnetic block and the magnetic ring is used for separating the dynamic sealing part and the static sealing part.

Preferably, the transmission component comprises a guide rod, a floater and a valve plate, the valve plate and the floater are respectively fixed at the upper end and the lower end of the guide rod, a repelling magnetic block and an attracting magnetic block are further fixed on the guide rod, the height position of the repelling magnetic block corresponds to that of the magnetic ring, the repelling magnetic block and the magnetic ring repel each other, when the height position of the floater moves to the lowest position of the mechanical seal due to buoyancy of water, the height position of the attracting magnetic block corresponds to that of the magnetic ring, and the attracting magnetic block and the magnetic ring attract each other.

When no water exists in the impeller cavity, the bottom end of the guide rod is positioned at the supporting position in the middle of the floater box due to the action of gravity, the two floaters are suspended in the movable part of the floater, the repelling magnetic block and the magnetic ring are at the same height at the moment, the magnetic ring is just at the middle position of the height of the repelling magnetic block, a repelling force exists between the repelling magnetic block and the magnetic ring, the movable sealing part and the static sealing part are separated, the magnetic ring is an annular magnet, and the surface facing the repelling magnetic block and the surface facing the magnetic ring of the repelling magnetic block are the same-name magnetic poles; when water gradually enters the impeller cavity, the water enters the floater box from the liquid inlet channel until the water reaches the lower part of the mechanical seal, the two floaters also reach the height of the lower edge of the mechanical seal, at the moment, the repelling magnetic block and the attracting magnetic block move upwards to enable the attracting magnetic block to reach the height position of the magnetic ring, the magnetic ring is also located at the middle position of the attracting magnetic block to form strong attraction without interference of the repulsion force, the movable sealing part moves towards the direction of the static sealing part and is in close contact with the static sealing part to form sealing, therefore, the mechanical seal is changed from gap sealing to contact sealing through the change of the liquid level, the abrasion of the sealing part can not be caused under the idling state, and the sealing can be carried out in time during water flow.

Preferably, the width of the magnetic ring is smaller than the heights of the repelling magnetic block and the attracting magnetic block, and the motion stroke of the guide rod is equal to the height of the repelling magnetic block.

Preferably, a valve seat matched with the valve plate is arranged in the air exhaust channel, and a pressure control switch is arranged in the valve seat.

Preferably, take out the negative pressure subassembly and include contact piece, slide bar, piston, baffle and check valve, contact piece with epaxial cam sliding connection rotates, the slide bar is fixed on the contact piece, just the slide bar runs through the baffle, the piston is fixed the other end of slide bar, bleed passage with all be equipped with on the piston the check valve, the baffle with form between the piston through the check valve with the air chamber of bleed passage intercommunication.

The contact block can be a wear-resistant metal or ceramic block with a certain weight, when the rotating shaft rotates, the contact block is driven to move up and down, at the moment, the sliding rod drives the piston to move up and down, so that the air chamber is continuously compressed and expanded, due to the arrangement of the air suction channel and the check valve on the piston, when the air chamber is compressed, air is discharged from the check valve on the piston, when the air chamber is stretched, the air enters the air chamber from the air suction channel and the check valve in the middle of the air suction channel in the impeller cavity, and continuous air suction from the impeller cavity is formed, so that the air pressure in the impeller cavity is reduced.

Preferably, an electromagnetic coil is fixed below the partition plate, a permanent magnet is fixed above the contact block, the permanent magnet and the electromagnetic coil are mutually repelled or attracted, and the electromagnetic coil is in signal connection with the voltage-controlled switch.

Preferably, the float box comprises a magnetic block sliding part, a support moving part and a float moving part, a columnar space is arranged in the magnetic block sliding part, the repelling magnetic block and the attracting magnetic block are connected to the inner wall of the magnetic block sliding part in a sliding mode, the guide rod is connected with the float through an arc-shaped support, a space for accommodating the arc-shaped support is arranged in the support moving part, and the float moving part surrounds the rotating shaft and the outer side of the mechanical seal.

The magnetic block sliding part with the column-shaped space can enable the repelling magnetic block and the attracting magnetic block to stably slide in the magnetic block sliding part without shaking, in order to enable the floater to stride across the rotating shaft, two arc-shaped supports are adopted to enable the floater to be connected with the guide rod, in order to enable the floater and the guide rod to have large displacement, the space adapting to the arc-shaped supports is arranged in the support moving part, and in addition, the floater moving part is a space approximate to an ellipse so as to be convenient for transmission by utilizing the arc-shaped supports.

Preferably, the turntable and the float box are in sealed connection by adopting a non-magnetic isolation plate.

The non-magnetic conductive isolation plate is hermetically connected with a stainless steel plate, an aluminum plate or a toughened glass plate, and the like, so that the magnetic attraction influence between the repelling magnetic block and the attracting magnetic block and the magnetic ring is reduced.

Preferably, the dynamic sealing part and the static sealing part have a gap in a separated state, and a blade is arranged on the dynamic sealing part and is positioned in the gap.

When the dynamic sealing part rotates along with the rotating shaft, the blades rotate, air is blown to one side away from the impeller in the gap, low pressure is formed on the left sides of the blades, high pressure is formed on the right sides of the blades, and the air pressure in the impeller cavity is prevented from increasing.

Compared with the prior art, the invention has the beneficial effects that:

the invention sets the sealing part on the rotating shaft into a separable form, when no liquid is fed, the sealing part is separated, the impeller rotates without overheating the sealing part, the motor can be directly started, the water diversion device is not required to be filled, simultaneously, the load during starting can be reduced, the starting current is reduced, so as to reduce the influence on the fluctuation of a power grid, negative pressure is pumped in the impeller box by utilizing the power of the shaft, water enters from the liquid inlet after reaching relative negative pressure, then the liquid level is raised by the entering of the water, the separated sealing parts are jointed by utilizing the transmission part moving along with the liquid level, the sealing is realized, the air suction channel and the negative pressure pumping device are closed at the same time, and normal drainage is carried out, therefore, in the sequential starting of the pump set, independent water diversion, filling and water storage equipment are not required to be used, particularly, the starting time can be reduced on the occasions with more pumps, form good drainage effect to reduce the construction fund of pump station and the input of equipment, also reduced the joint control degree of difficulty of water pump and diversion device, the start-up mode is simple and convenient.

Drawings

FIG. 1 is a schematic structural diagram of a negative pressure pumping state of a water station pump set sequentially starting a drainage water replenishing device;

FIG. 2 is a schematic structural diagram of a water station pump set in a water diversion state when the water station pump set is started with a drainage water replenishing device in sequence;

FIG. 3 is a schematic view of the construction of the float cassette of the present invention;

FIG. 4 is a schematic structural view showing a state in which water is introduced into the float case according to the present invention;

FIG. 5 is a schematic view of the structure at A in FIG. 1;

FIG. 6 is a schematic view showing the distribution of the blades on the dynamic seal portion of the present invention.

Reference numbers in the figures: 1. an impeller case; 101. an impeller cavity; 102. a liquid inlet; 103. a liquid inlet channel; 11. an impeller; 12. a rotating shaft; 121. a cam; 13. mechanical sealing; 131. a dynamic seal part; 132. a static seal portion; 133. a sealing member; 134. a blade; 14. a turntable; 141. a magnetic ring; 15. a non-magnetically conductive separator plate; 2. a float box; 201. a magnetic block sliding part; 202. a bracket movable part; 203. a float movable portion; 21. a guide bar; 211. an arc-shaped bracket; 22. a float; 23. a repulsive magnetic block; 24. a suction magnetic block; 3. a negative pressure pumping assembly; 301. an air chamber; 31. a contact block; 311. a permanent magnet; 32. a slide bar; 33. a piston; 34. a partition plate; 341. an electromagnetic coil; 35. a one-way valve; 4. an air extraction channel; 41. a valve plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1 to 6, the drainage and water replenishing device for the sequential start of the pump set in the water station comprises an impeller 11 installed at the output end of the pump, a rotating shaft 12 and an impeller box 1 installed at the front end of the pump body, wherein a float box 2 is arranged outside one side of the impeller box 1 close to the rotating shaft 12, the float box 2 is communicated with an impeller cavity 101 in the impeller box 1 through a liquid inlet channel 103, the liquid inlet channel 103 is positioned below the rotating shaft 12, a negative pressure pumping assembly 3 in transmission connection with the rotating shaft 12 is arranged on one side of the float box 2, the negative pressure pumping assembly 3 is communicated with the impeller cavity 101 in the impeller box 1 through an air exhaust channel 4, the air exhaust channel 4 is positioned above the rotating shaft 12, the rotating shaft 12 is in sealing connection with the impeller box 1 through a mechanical seal 13, and a transmission component for controlling the sealing state of the mechanical seal 13 and.

The pump is the pump in the prior art, no improvement is made, a float box 2 is arranged on the outer wall of one side of an impeller box 1 close to the pump, the impeller box 1 and the float box 2 are separated, the float box 2 surrounds the outside of a rotating shaft 12 and a mechanical seal 13, a hole (liquid inlet channel 103) connected with the impeller box 1 is arranged at the lower part of the float box 2, the float box 2 can enter the float box 2 mainly when the water level in the impeller box 1 rises, so that a float 22 in the float box 2 floats, and after the float 22 floats by utilizing the rising of the water level, corresponding components are driven to move to control the matching state of the mechanical seal 13 and the conduction state of an air suction channel 4, wherein, a gear transmission mode and the like can be adopted between a negative pressure suction component 3 and the rotating shaft 12, the negative pressure suction component 3 can be a vacuum pump and the like in the prior art, when drainage is needed, the pump is directly opened, at the moment, the mechanical seal 13 is a gap seal, the rotation of the rotating shaft 12 does not enable the mechanical seal 13 to be abraded to generate high heat, the water level in the impeller cavity 101 is lower than that of the mechanical seal 13 on the rotating shaft 12, the negative pressure pumping assembly 3 pumps negative pressure into the impeller cavity 101 through the air pumping channel 4 until the air pressure in the impeller cavity 101 is reduced to a certain value, water enters the impeller cavity 101 from the liquid inlet 102 and gradually reaches the mechanical seal 13 along with the rising of the water level, at the moment, the floater 22 in the floater box 2 floats, the mechanical seal 13 is changed into contact seal from the gap seal, the water is prevented from being filled in, the water is used for lubricating and cooling, at the moment, the negative pressure pumping channel 4 does not need to be pumped again, and the air pumping channel 4 and the negative pressure pumping assembly 3 are closed by utilizing a linkage component.

Specifically, the mechanical seal 13 includes a dynamic seal portion 131 and a static seal portion 132, the dynamic seal portion 131 is movably connected to the rotating shaft 12 along the axial direction, the static seal portion 132 is fixed to the impeller case 1, both the dynamic seal portion 131 and the static seal portion 132 are provided with a seal component 133, the dynamic seal portion 131 is further fixed with a rotating disc 14, the rotating disc 14 is located in the impeller cavity 101, and the rotating disc 14 is provided with a magnetic ring 141.

As shown in fig. 1 and 2, the dynamic seal part 131 is installed on the rotating shaft 12, the static seal part 132 is fixed on the impeller case 1, when the dynamic seal part 131 contacts with the static seal part 132, the dynamic seal part 131 contacts with the seal part 133 on the static seal part 132, the material of the seal part 133 is ceramic, one side of the seal part 133 is provided with a rubber pad, so that a better sealing effect is achieved between the rotating shaft 12 and the impeller box 1, and under the condition that the rotating shaft 12 and the impeller box 1 rotate relatively and no water is used for lubricating and cooling, the sealing part 133 is easy to burn out, therefore, under the condition of no water, the dynamic sealing part 131 and the static sealing part 132 are separated to form clearance sealing, the dynamic sealing part 131 can be driven to generate axial displacement by the rotary disc 14 fixed with the dynamic sealing part 131, the movable seal 131 and the static seal 132 are separated from each other by mutual repulsion between the repulsive magnetic block 23 and the magnetic ring 141.

Specifically, the transmission component comprises a guide rod 21, a floater 22 and a valve plate 41, the valve plate 41 and the floater 22 are respectively fixed at the upper end and the lower end of the guide rod 21, a repelling magnetic block 23 and an attracting magnetic block 24 are further fixed on the guide rod 21, when the high height positions of the attracting magnetic block 24 and the magnetic ring 141 move to the lowest position of the mechanical seal 13 due to the buoyancy of water, the height positions of the attracting magnetic block 24 and the magnetic ring 141 correspond, and the attracting magnetic block 24 and the magnetic ring 141 attract each other.

As shown in fig. 1-4, when there is no water in the impeller cavity 101, the bottom end of the guide rod 21 is located at the support in the middle of the float box 2 due to gravity, the two floats 22 are suspended in the float moving part 203, at this time, the repelling magnetic block 23 and the magnetic ring 141 are at the same height, the magnetic ring 141 is just at the middle position of the height of the repelling magnetic block 23, there is a repelling force between the repelling magnetic block 23 and the magnetic ring 141, so as to separate the movable sealing part 131 and the static sealing part 132, the magnetic ring 141 is a ring-shaped magnet, and the side facing the repelling magnetic block 23 and the side facing the magnetic ring 141 of the repelling magnetic block 23 are the same magnetic pole; when water is gradually fed into the impeller cavity 101, the water enters the floater box 2 from the liquid inlet channel 103 until the water reaches the lower part of the mechanical seal 13, the two floaters 22 also reach the height of the lower edge of the mechanical seal 13, at this time, the repelling magnetic block 23 and the attracting magnetic block 24 move upwards, so that the attracting magnetic block 24 reaches the height position of the magnetic ring 141, the magnetic ring 141 is also positioned at the middle position of the attracting magnetic block 24, strong attraction is formed, interference of the repulsion force does not exist, the movable seal part 131 moves towards the direction of the static seal part 132 and is in close contact with the static seal part 132 to form sealing, therefore, the mechanical seal 13 is changed from gap sealing to contact sealing through the liquid level change, abrasion of the sealing part is avoided in an idling state, and sealing can be performed in time when water flows.

Specifically, the width of the magnetic ring 141 is smaller than the heights of the repulsive magnetic block 23 and the attractive magnetic block 24, and the movement stroke of the guide rod 21 is equal to the height of the repulsive magnetic block 23, so that the repulsive magnetic block 23 and the attractive magnetic block 24 do not interfere with each other or the interference effect is reduced after the repulsive magnetic block 23 and the attractive magnetic block 24 move.

Specifically, be equipped with in the air exhaust passage 4 with valve plate 41 complex disk seat, be equipped with pressure-controlled switch in the disk seat, in order to realize better linkage cooperation effect, after valve plate 41 moved to the disk seat in the air exhaust passage 4 and closed air exhaust passage 4, take out negative pressure subassembly 3 and also need stop work, consequently, utilize the cooperation of the pressure-controlled switch in valve plate 41 and the disk seat, control the state of taking out negative pressure subassembly 3.

Specifically, as shown in fig. 1 and 2, the negative pressure pumping assembly 3 includes a contact block 31, a sliding rod 32, a piston 33, a partition 34 and a check valve 35, the contact block 31 is slidably connected to the cam 121 on the rotating shaft 12, the sliding rod 32 is fixed on the contact block 31, the sliding rod 32 penetrates through the partition 34, the piston 33 is fixed at the other end of the sliding rod 32, the check valve 35 is disposed on each of the pumping channel 4 and the piston 33, an air chamber 301 communicated with the pumping channel 4 through the check valve 35 is formed between the partition 34 and the piston 33, the contact block 31 can be a wear-resistant metal or ceramic block with a certain weight, when the rotating shaft 12 rotates, the contact block 31 is driven to move up and down, at this time, the sliding rod 32 drives the piston 33 to move up and down, so that the air chamber 301 is continuously compressed and expanded, due to the arrangement of the check valve 35 on the pumping channel 4 and the piston 33, when the air chamber 301 is compressed, when the air chamber 301 is stretched, air enters the air chamber 301 from the suction passage 4 and the check valve 35 in the impeller cavity 101, and continuous suction from the impeller cavity 101 is formed to reduce the air pressure in the impeller cavity 101.

Specifically, as shown in fig. 1 and fig. 2, an electromagnetic coil 341 is fixed below the partition plate 34, a permanent magnet 311 is fixed above the contact block 31, the permanent magnet 311 and the electromagnetic coil 341 repel or attract each other, the electromagnetic coil 341 is in signal connection with the voltage-controlled switch, and in the operating state of the negative pressure pumping assembly 3, the permanent magnet 311 and the electromagnetic coil 341 repel each other, so that the contact block 31 and the cam 121 can be matched relatively tightly, and in the non-operating state of the negative pressure pumping assembly 3, the current of the electromagnetic coil 341 is reversed, and the permanent magnet 311 and the electromagnetic coil 341 attract each other, so that the contact block 31 is not in contact with the cam 121.

Specifically, the float case 2 includes a magnetic block sliding portion 201, a bracket moving portion 202 and a float moving portion 203, a columnar space is provided in the magnetic block sliding portion 201, the repelling magnetic block 23 and the attracting magnetic block 24 are slidably connected to an inner wall of the magnetic block sliding portion 201, the guide rod 21 is connected to the float 22 through an arc-shaped bracket 211, a space for accommodating the arc-shaped bracket 211 is provided in the bracket moving portion 202, the float moving portion 203 surrounds an outer side of the rotating shaft 12 and the mechanical seal 13, the repelling magnetic block 23 and the attracting magnetic block 24 can stably slide in the magnetic block sliding portion 201 by using the magnetic block sliding portion 201 having the columnar space without shaking, in order to enable the float 22 to stride over the rotating shaft 12, the float 22 is connected to the guide rod 21 by using two arc-shaped brackets 211, and in order to enable the float 22 and the guide rod 21 to have a large displacement, a space adapted to the arc-shaped bracket 211 is provided in, in addition, the float motion part 203 is a space approximately in an elliptical shape so as to facilitate transmission using the arc bracket 211.

Specifically, the turntable 14 and the floater box 2 are hermetically connected by the non-magnetic-conductive isolation plate 15, and the non-magnetic-conductive isolation plate 15 is hermetically connected by a 304 stainless steel plate, an aluminum plate or a toughened glass plate, so that the magnetic attraction influence among the repelling magnetic block 23, the attracting magnetic block 24 and the magnetic ring 141 is reduced.

Specifically, the dynamic seal part 131 and the static seal part 132 have a gap in a separated state, the dynamic seal part 131 is provided with a blade 134, the blade 134 is located in the gap, when the dynamic seal part 131 rotates along with the rotating shaft 12, the blade 134 rotates, air is blown to one side of the gap away from the impeller 11, low pressure is formed on the left side of the blade 134, high pressure is formed on the right side, and air pressure in the impeller cavity 101 is prevented from increasing.

The working principle is as follows: when no water exists in the impeller cavity 101, the bottom end of the guide rod 21 is positioned at the support position in the middle of the float box 2 due to the action of gravity, the two floats 22 are suspended in the float movable part 203, the repelling magnetic block 23 and the magnetic ring 141 are at the same height at the moment, the magnetic ring 141 is just at the middle position of the height of the repelling magnetic block 23, a repelling force exists between the repelling magnetic block 23 and the magnetic ring 141, the movable sealing part 131 and the static sealing part 132 are separated, the magnetic ring 141 is an annular magnet, and one surface facing the repelling magnetic block 23 and one surface facing the magnetic ring 141 of the repelling magnetic block 23 are the same-name magnetic poles; when the rotating shaft 12 of the pump machine is started to rotate, the contact block 31 is driven to move up and down, at this time, the sliding rod 32 drives the piston 33 to move up and down, so that the air chamber 301 is continuously compressed and expanded, due to the arrangement of the air suction channel 4 and the one-way valve 35 on the piston 33, when the air chamber 301 is compressed, air is discharged from the one-way valve 35 on the piston 33, when the air chamber 301 is stretched, the air enters the air chamber 301 from the one-way valve 35 in the air suction channel 4 and in the impeller cavity 101, so that continuous air suction from the impeller cavity 101 is formed, so as to reduce the air pressure in the impeller cavity 101, when water gradually enters the impeller cavity 101, the water enters the float box 2 from the liquid inlet channel 103, until the water reaches the lower edge of the mechanical seal 13, the two floats 22 also reach the height of the lower edge of the mechanical seal 13, at this time, the repelling magnetic block 23 and the attracting magnetic block 24 move up, the magnetic ring 141 is also positioned in the middle of the magnetic attraction block 24 to form a strong attraction force without interference of a repulsive force, and the movable sealing part 131 moves towards the direction of the static sealing part 132 and is in close contact with the static sealing part to form sealing, so that the mechanical seal 13 is converted from gap sealing to contact sealing through the change of the liquid level, the abrasion of a sealing part is avoided in an idle state, and the sealing can be timely carried out when water flows, the permanent magnet 311 and the electromagnetic coil 341 repel each other in an operation state of the negative pressure pumping assembly 3, so that the contact block 31 and the cam 121 are matched tightly, and when the negative pressure pumping assembly 3 does not work, the current of the electromagnetic coil 341 reverses, the permanent magnet 311 and the electromagnetic coil 341 attract each other, so that the contact block 31 is not in contact with the cam 121; therefore, the invention can realize the following effects that when drainage is needed, the pump is directly opened, at the moment, the mechanical seal 13 is a clearance seal, the rotation of the rotating shaft 12 can not lead the mechanical seal 13 to be worn to generate high heat, the water level in the impeller cavity 101 is lower than the mechanical seal 13 on the rotating shaft 12, the negative pressure pumping component 3 pumps negative pressure into the impeller cavity 101 through the air pumping channel 4 until the air pressure in the impeller cavity 101 is reduced to a certain value, water enters the impeller cavity 101 from the liquid inlet 102 and gradually reaches the mechanical seal 13 along with the rise of the water level, at the moment, the floater 22 in the floater box 2 floats, the mechanical seal 13 is changed from the clearance seal into a contact seal to prevent water from being poured in, and water is used for lubrication and cooling, at the moment, the negative pressure does not need to be pumped again, the air pumping channel 4 and the negative pressure pumping component 3 are closed by using a linkage part along with the floater 22 floating, the rotation of the impeller 11 can not cause, meanwhile, the starting current can be reduced to reduce the fluctuation of a power grid, the power of a shaft is utilized to pump negative pressure in the impeller cavity 101, after the relative negative pressure is achieved, water enters from the liquid inlet 102, then the separated sealing elements are attached by utilizing a transmission part through the rise of the liquid level to realize sealing, and the air suction channel 4 and the negative pressure pumping device are closed simultaneously to carry out normal drainage, wherein a one-way valve or an electromagnetic valve linked with the negative pressure pumping component 3 is arranged at the water drainage port to prevent air from entering during negative pressure pumping.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. Drainage moisturizing device is started in proper order to water station pump package, its characterized in that: including installing impeller (11), pivot (12) at the pump output and installing impeller box (1) at pump body front end, impeller box (1) is close to one side outside of pivot (12) is equipped with float box (2), float box (2) with impeller cavity (101) in impeller box (1) are through inlet channel (103) intercommunication, inlet channel (103) are located the below of pivot (12), one side of float box (2) be equipped with take out negative pressure components (3) that pivot (12) transmission is connected, take out negative pressure components (3) with through pumping channel (4) intercommunication between impeller cavity (101) in impeller box (1), pumping channel (4) are located the top of pivot (12), pivot (12) with through mechanical seal (13) sealing connection between impeller box (1), and a transmission part for controlling the sealing state of the mechanical seal (13) and the conduction state of the air exhaust channel (4) is arranged in the float box (2).

2. The water station pump set sequential starting drainage water replenishing device according to claim 1, characterized in that: mechanical seal (13) are including moving sealing (131) and static sealing (132), move sealing (131) along the connection of axial activity in pivot (12) on, static sealing (132) are fixed on impeller box (1), all install seal part (133) on moving sealing (131) and static sealing (132), still be fixed with carousel (14) on moving sealing (131), carousel (14) are located in impeller chamber (101), be equipped with magnetism ring (141) on carousel (14).

3. The water station pump set sequential starting drainage water replenishing device according to claim 2, characterized in that: the transmission part comprises a guide rod (21), a floater (22) and a valve plate (41), the valve plate (41) and the floater (22) are respectively fixed at the upper end and the lower end of the guide rod (21), a repelling magnetic block (23) and an attracting magnetic block (24) are further fixed on the guide rod (21), the repelling magnetic block (23) corresponds to the height position of the magnetic ring (141), the repelling magnetic block (23) and the magnetic ring (141) repel each other, when the height position of the floater (22) moves to the lowest position of the mechanical seal (13) due to the buoyancy of water, the attracting magnetic block (24) corresponds to the height position of the magnetic ring (141), and the attracting magnetic block (24) and the magnetic ring (141) attract each other.

4. The water station pump set sequential starting drainage water replenishing device of claim 3, wherein: the width of the magnetic ring (141) is smaller than the heights of the repelling magnetic block (23) and the attracting magnetic block (24), and the motion stroke of the guide rod (21) is equal to the height of the repelling magnetic block (23).

5. The water station pump set sequential starting drainage water replenishing device of claim 3, wherein: and a valve seat matched with the valve plate (41) is arranged in the air exhaust channel (4), and a pressure control switch is arranged in the valve seat.

6. The water station pump set sequential starting drainage water replenishing device of claim 5, wherein: take out negative pressure subassembly (3) including contact piece (31), slide bar (32), piston (33), baffle (34) and check valve (35), contact piece (31) with cam (121) sliding connection on pivot (12), slide bar (32) are fixed contact piece (31) is last, just slide bar (32) run through baffle (34), piston (33) are fixed the other end of slide bar (32), bleed passage (4) with all be equipped with on piston (33) check valve (35), baffle (34) with form between piston (33) through check valve (35) with air chamber (301) of bleed passage (4) intercommunication.

7. The water station pump set sequential starting drainage water replenishing device of claim 6, wherein: an electromagnetic coil (341) is fixed below the partition plate (34), a permanent magnet (311) is fixed above the contact block (31), the permanent magnet (311) and the electromagnetic coil (341) are mutually repelled or attracted, and the electromagnetic coil (341) is in signal connection with the voltage-controlled switch.

8. The water station pump set sequential starting drainage water replenishing device of claim 3, wherein: float box (2) include magnetic path sliding part (201), support movable part (202) and float movable part (203), the space that has the column type in magnetic path sliding part (201), repulsion magnetic path (23) and attraction magnetic path (24) sliding connection are in the inner wall of magnetic path sliding part (201), guide arm (21) with connect through arc support (211) between float (22), have in the support movable part (202) and hold the space of arc support (211), float movable part (203) surround the outside of pivot (12) and mechanical seal (13).

9. The water station pump set sequential starting drainage water replenishing device according to claim 2, characterized in that: the rotary disc (14) is hermetically connected with the float box (2) by a non-magnetic conductive isolation plate (15).

10. The water station pump set sequential starting drainage water replenishing device according to claim 2, characterized in that: the dynamic sealing part (131) and the static sealing part (132) have a gap in a separation state, a blade (134) is arranged on the dynamic sealing part (131), and the blade (134) is located in the gap.