CN112145439B

CN112145439B - Single-stage centrifugal pump

Info

Publication number: CN112145439B
Application number: CN202011063344.9A
Authority: CN
Inventors: 徐国华
Original assignee: Dongying Shenlan New Material Co ltd
Current assignee: DONGYING SHENLAN NEW MATERIAL Co.,Ltd.
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-08
Anticipated expiration: 2040-09-30
Also published as: CN112145439A

Abstract

The invention discloses a single-stage centrifugal pump, which comprises a pump body, a pump cover, an impeller, a pump shaft and a motor, wherein the impeller is arranged in a pump cavity, the pump cover is arranged on an opening at the right side of the pump body, the pump shaft can be rotatably arranged on the pump cover in a penetrating way, the left end of the pump shaft is connected with the impeller in a transmission way, and the right end of the pump shaft is connected with the motor in a transmission way, and the single-stage centrifugal pump is characterized in that: the pump cover is internally provided with a rotating sleeve and a control sleeve, the rotating sleeve can be sleeved on the pump shaft in a linkage manner, the control sleeve is sleeved on the rotating sleeve, the control sleeve is fixedly connected with the pump cover, an axial driving structure is arranged between the control sleeve and the rotating sleeve, the rotating sleeve can axially reciprocate and is arranged between the pump shaft and the control sleeve, the rotating sleeve is provided with a reset assembly, the left end of the rotating sleeve is respectively sealed and attached to the pump shaft and the control sleeve, when the rotating sleeve moves rightwards, the left side of the rotating sleeve forms an air suction cavity, a one-way air inlet valve and a one-way exhaust valve are arranged on the left side face of the corresponding pump cover in a matched manner, the one-way air inlet valve is communicated with the air suction cavity and the pump cavity, and the one-way exhaust valve is communicated with the air suction cavity and the outside. The invention does not need to pump, and is convenient to use.

Description

Single-stage centrifugal pump

Technical Field

The invention relates to an improved pump, in particular to an improved single-stage centrifugal pump.

Background

Centrifugal pumps are widely used in the industries of chemical and petroleum industry, agricultural production, mining and metallurgical industry, electric power industry, nuclear power plants, national defense construction, pharmacy, water conservancy and the like, and work by utilizing the centrifugal motion of water or oil caused by the rotation of an impeller. Before the water pump or the oil pump is started, the inner cavity of the pump body and the water suction pipe are filled with water or oil, then the motor is started, the pump shaft drives the impeller and the water or the oil to do high-speed rotation motion, the water or the oil generates centrifugal motion and is thrown to the outer edge of the impeller, and the water or the oil flows into a water pressing pipeline or an oil pressing pipeline of the water pump or the oil through a flow channel in the pump body, and the water pump or the oil pump has the following defects that: because most centrifugal pump pumps are before starting, the pump body inner chamber does not fill with water or oil, if starting motor drives the impeller rotation this moment, can't make the pump body inner chamber produce the vacuum, can't make the water or oil that absorbs in the water pipe or absorb the oil pipe absorbed the pump body inner chamber promptly, thus discharge via the runner in the pump body, consequently need before starting motor, the manual work fills the pump body inner chamber with water or oil, commonly known as "pump priming", have use loaded down with trivial details, with high costs, influence efficiency, influence the technical defect of safety.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a single-stage centrifugal pump which is convenient to use and does not need to be pumped.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this kind of single-stage centrifugal pump, including the pump body, pump cover, impeller, pump shaft and motor, be equipped with the outlet chamber of pump chamber and left inlet chamber of intercommunication pump chamber and intercommunication pump chamber upside in the pump body, the impeller is joined in marriage in the pump chamber, the pump cover is located on the opening of pump body right side, the pump shaft is rotatable to be worn to locate on the pump cover, and pump shaft left end links to each other with the impeller transmission, and the pump shaft right-hand member links to each other its characterized in that with motor drive: the pump cover is internally provided with a rotating sleeve and a control sleeve, the rotating sleeve can be sleeved on the pump shaft in a linkage manner, the control sleeve is sleeved on the rotating sleeve, the control sleeve is fixedly connected with the pump cover, an axial driving structure is arranged between the control sleeve and the rotating sleeve, the rotating sleeve can axially reciprocate between the pump shaft and the control sleeve, the rotating sleeve is provided with a resetting component, the left end of the rotating sleeve is respectively and hermetically attached to the pump shaft and the control sleeve, when the rotating sleeve moves rightwards, the left side of the rotating sleeve forms an air suction cavity, the corresponding left side surface of the pump cover is provided with a one-way air inlet valve and a one-way exhaust valve, the one-way air inlet valve is communicated with the air suction cavity and the pump cavity, and the one-way exhaust valve is communicated with the air suction cavity and the outside; the axial driving structure comprises a spiral groove arranged on the inner circle of the control sleeve and a positioning rod radially penetrating the rotary sleeve, the positioning rod can be radially movably arranged, the positioning rod is provided with a first return spring, when the outer end of the positioning rod extends out of the rotary sleeve, the positioning rod is in transmission fit with the spiral groove, the left end of the spiral groove is provided with a flat groove, the flat groove is selectively connected with the spiral groove through a guide cushion block which is rotatably arranged, the left side of the guide cushion block is provided with a driving block which drives the guide cushion block to rotate, the guide cushion block is connected with a third return spring, the driving block can rotate to enter and exit the control sleeve and the pump cover, the corresponding control sleeve and the pump cover are provided with hollows, the driving block is provided with a transmission mechanism, the transmission mechanism takes liquid in the outlet cavity as a power source, the right end of the spiral groove is provided with an arc inclined surface which drives the positioning rod to retract into the rotary sleeve, when the outer end of the positioning rod retracts into the rotary sleeve, the inner end of the positioning rod extends into the rotating sleeve and is arranged in a limiting port arranged on the excircle of the pump shaft, a clamping part is arranged at the upper end of the corresponding positioning rod, the clamping part is in limiting fit with the inner circle of the rotating sleeve, the clamping part is removed from limiting fit with the left side wall of the limiting port, and the left side wall of the limiting port corresponds to the flat groove.

Drive mechanism is including feed liquor chamber, push pedal, division board and stay cord, the feed liquor chamber is located the export chamber right side, and is equipped with the feed liquor hole of intercommunication export chamber on the wall of feed liquor chamber left side, is equipped with the external breathing hole of intercommunication on the wall of feed liquor chamber right side, the push pedal can be controlled and is moved and set up in the feed liquor intracavity, and the push pedal sets up second reset spring, the division board can be controlled and move and penetrate the isolated cooperation with it in the export oral cavity, and the division board right-hand member links to each other with the push pedal transmission, stay cord one end links to each other with the push pedal transmission, and the stay cord other end links to each other with the drive block transmission, and corresponding feed liquor chamber intercommunication has a rope passageway, and the movable sealing plug that is equipped with in the rope passageway, the stay cord is fixed to be worn to locate on the sealing plug, the cover is equipped with the spring coil on the pump cover, and the spring coil is disposed in the drive block outside.

The clamping part comprises a clamping tooth and a fourth reset spring, the clamping tooth can move left and right and is arranged in a groove in the left side face of the outer end of the positioning rod, and the fourth reset spring is connected between the clamping tooth and the groove.

The reset assembly comprises a horizontal push spring and a plane bearing, the plane bearing is connected to the right end of the rotating sleeve, and the horizontal push spring is connected between the plane bearing and the pump cover.

The improved single-stage centrifugal pump has the advantages that the improved single-stage centrifugal pump does not need to be filled with a pump, can automatically suck and remove gas in the inner cavity of the pump body and the inner cavity of the water suction pipe, can stop the operation of air suction when the pump normally discharges liquid, and has strong safety and high reliability; the motor does not need to be arranged independently during air exhaust, and the air exhaust device has the advantages of improving efficiency and saving cost.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a diagram of the pump of the present invention in a shut-down state.

Fig. 2 is a diagram of the pump on state of the present invention.

Fig. 3 is a gas pumping state diagram of the present invention.

Fig. 4 is a schematic diagram of the control sleeve for pumping air according to the present invention.

Fig. 5 is a schematic view of the control sleeve of the pump of the present invention when the pump stops sucking.

Fig. 6 is a schematic diagram of a spring coil structure according to the present invention.

FIG. 7 is an enlarged view of portion A of FIG. 2 according to the present invention.

FIG. 8 is a schematic cross-sectional view taken along line E-E of FIG. 3 according to the present invention.

Detailed Description

The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. In this embodiment, the single-stage centrifugal pump includes a pump body 1, a pump cover 20, an impeller 4, a pump shaft 37 and a motor 26, wherein the pump body 1 is provided with a pump cavity, an inlet cavity 2 communicating the left side of the pump cavity and an outlet cavity 7 communicating the upper side of the pump cavity, the inlet cavity 2 is communicated with a water suction pipe, the impeller 4 is arranged in the pump cavity, a seal ring 3 is arranged between the impeller 4 and the inlet cavity, a socket cavity 40 is formed in the area where the impeller 4 is located, the pump cover 20 is covered on the right side opening of the pump body 1, the pump cover 20 is provided with a pump body, a gland 6 connected to the left side of the pump body and a middle support 24 connected to the right side of the pump body, the pump shaft 37 is rotatably inserted into the pump cover 20, the left end of the pump shaft 37 is in transmission connection with the impeller 4, the right end of the pump shaft 37 is in transmission connection with the motor 26, the pump cover 20 is provided with a rotating sleeve 36 and a control sleeve 21, the rotating sleeve 36 is arranged on the pump shaft 37 in linkage, the pump shaft 37 is provided with a key 30, a key groove 31 is formed in the rotary sleeve 36, the length of the key groove 31 is longer than that of the key 30, the control sleeve 21 is sleeved on the rotary sleeve 36, the control sleeve 21 is fixedly connected with the pump cover 20, an anti-rotation pin 29 is arranged between the control sleeve 21 and the pump cover 20, an axial driving structure is arranged between the control sleeve 21 and the rotary sleeve 36, the rotary sleeve 36 can axially reciprocate between the pump shaft 37 and the control sleeve 21, the rotary sleeve 36 is provided with a reset component, the left end of the rotary sleeve 36 is respectively in sealing fit with the pump shaft 37 and the control sleeve 21, when the rotary sleeve 36 moves rightwards, an air suction cavity 27 is formed on the left side of the rotary sleeve 36, a one-way air inlet valve 5 and a one-way air outlet valve 38 are arranged on the left side face of the corresponding pump cover 20, the one-way air inlet valve 5 is communicated with the air suction cavity 27 and the pump cavity, the one-way air outlet valve 38 is communicated with the outside, and an inlet of the one-way air outlet valve 38 is provided with a leakage-proof ring 41 matched with the left end face of the rotary sleeve 36; the axial driving structure comprises a spiral groove 19 arranged on the inner circle of the control sleeve 21 and a positioning rod 34 radially penetrating through the rotary sleeve 36, the positioning rod 34 can be radially movably arranged, the positioning rod 34 is provided with a first return spring 33, when the outer end of the positioning rod 34 extends out of the rotary sleeve 36, the positioning rod 34 is in transmission fit with the spiral groove 19, the left end of the spiral groove 19 is provided with a flat groove 45, the flat groove 45 is selectively connected with the spiral groove 19 through a guide cushion block 18 which is rotatably arranged, the left side of the guide cushion block 18 is provided with a driving block 16, the driving block 16 drives the guide cushion block 18 to rotate, the guide cushion block 18 is connected with a third return spring 44, the driving block 16 can rotate to enter and exit from the control sleeve 21 and the pump cover 20, the corresponding control sleeve 21 and the pump cover 20 are provided with a hollow-out part, the driving block 16 is provided with a transmission mechanism, the transmission mechanism takes liquid in the outlet cavity 7 as a power source, the right end of the spiral groove 19 is provided with an arc inclined surface 25 for driving the positioning rod 34 to retract into the rotary sleeve 36, when the outer end of the positioning rod 34 retracts into the rotating sleeve 36, the inner end of the positioning rod 34 extends into the rotating sleeve 36 and is arranged in the limiting opening 32 formed in the outer circle of the pump shaft 37, a clamping component is arranged at the upper end of the corresponding positioning rod 34 and is in limiting fit with the inner circle of the rotating sleeve 36, the clamping component is released from clamping limiting fit with the left side wall of the limiting opening 32, and the left side wall of the limiting opening 32 corresponds to the flat groove 45.

As a further improved specific embodiment, the transmission mechanism includes a liquid inlet cavity 10, a push plate 15, a partition plate 8 and a pull rope 13, the liquid inlet cavity 10 is located on the right side of the outlet cavity 7, a liquid inlet hole 9 communicated with the outlet cavity 7 is formed in the left side wall of the liquid inlet cavity 10, a breathing hole 12 communicated with the outside is formed in the right side wall of the liquid inlet cavity 10, the push plate 15 is arranged in the liquid inlet cavity 10 in a left-and-right moving manner, the push plate 15 is provided with a second return spring 11, the partition plate 8 is arranged in the outlet cavity 7 in a left-and-right moving manner and is in isolated fit with the outlet cavity 7, the right end of the partition plate 8 is connected with the push plate 15 in a transmission manner, one end of the pull rope 13 is connected with the push plate 15 in a transmission manner, the other end of the pull rope 13 is connected with a driving block 16 in a transmission manner, the corresponding liquid inlet cavity 10 is communicated with a rope outlet channel, a sealing plug 14 is movably arranged in the rope outlet channel, the pull rope 13 is fixedly arranged on the sealing plug 14, a spring ring 17 is sleeved on the pump cover 20, the spring ring 17 is arranged outside the drive block 16. The setting of division board 8 wherein enables the pump inner chamber and outside fluid-discharge tube isolated, when utilizing the commentaries on classics cover 36 to bleed, can reduce the volume of the body of bleeding, can be quicker get into the flowing back state, save time raises the efficiency.

As a specific embodiment of further improvement, the latch member includes a latch 35 and a fourth return spring 46, the latch 35 is disposed in a groove on the left side surface of the outer end of the positioning rod 34 in a manner of moving left and right, the fourth return spring 46 is connected between the latch 35 and the groove, the latch 35 moves left to extend out of the groove, and the latch 35 moves right to retract into the groove.

In a further improved embodiment, the restoring assembly includes a horizontal pushing spring 23 and a plane bearing 22, the plane bearing 22 is connected to the right end of the rotating sleeve 36, and the horizontal pushing spring 23 is connected between the plane bearing 22 and the pump cover 20.

The starting process of the invention is as follows: the motor 26 is started to drive the pump shaft 37 to rotate, the pump shaft 37 drives the impeller 4 and the rotary sleeve 36 to rotate, due to the guiding effect of the guide cushion block 18, the positioning rod 34 enters the spiral groove 19 along the inclined guide surface 28 formed on the right end surface of the guide cushion block 18 to move, the rotary sleeve 36 rotates and moves rightwards, the transverse pushing spring 23 is compressed, the left side of the rotary sleeve 36 forms an air suction cavity 27, air in the water suction pipe, the inlet cavity 2, the worm cavity and the outlet cavity 7 enters the air suction cavity 27 through the one-way air inlet valve 5, when the positioning rod 34 reaches the rightmost end of the spiral groove 19 and is separated from the spiral groove 19 along the arc surface, the latch 35 moves leftwards under the action of the fourth return spring 46, the latch 35 is clamped on the inner circle of the rotary sleeve 36, meanwhile, the rotary sleeve 36 moves leftwards under the action of the transverse pushing spring 23, the air suction cavity 27 is reduced, the air in the air suction cavity 27 is discharged through the one-way exhaust valve 38, and when the rotary sleeve 36 reaches the leftmost end, the latch 35 moves rightwards under the action of the left side wall of the limiting opening 32, limiting is removed, and the positioning rod 34 extends into the flat groove 45; because the rotary sleeve 36 rotates along with the pump shaft 37, the next circulation movement is carried out, when the gas in the suction pipe, the inlet cavity 2, the volute cavity and the outlet cavity 7 is sucked out and is filled with the liquid medium, the liquid medium enters the liquid inlet cavity 10 from the outlet cavity 7 through the liquid inlet hole 9, the push plate 15 and the partition plate 8 are pushed to move rightwards, the liquid medium in the pump is discharged outwards, at the moment, the driving block 16 rotates outwards around the rotating fulcrum 43 under the action of the pull rope 13 to remove the driving to the guide cushion block 18, the guide cushion block 18 rotates clockwise under the action of the pull spring, the right end face of the guide cushion block 18 and the left end face of the flat groove 45 are kept on the same plane, when the positioning rod 34 rotates along with the rotary sleeve 36, the positioning rod 34 always moves along the flat groove 45, the positioning rod 34 cannot enter the spiral groove 19, the rotary sleeve 36 cannot be driven, and the left side of the rotary sleeve 36 cannot form the suction cavity 27 moving rightwards, meanwhile, under the action of the leakage-proof ring 41, the liquid medium in the pump cannot flow out through the one-way exhaust valve 38.

The shutdown process of the invention: the motor 26 is turned off, liquid in the liquid inlet cavity 10 is discharged to the outlet cavity 7 through the liquid inlet hole 9, the push plate 15 and the isolation plate 8 move leftwards under the action of the second return spring, the outlet cavity 7 is isolated from the outside, the pull rope 13 is loose, the driving block 16 rotates around the rotating fulcrum 43 to reset under the action of the spring ring 17, the guide cushion block 18 is pushed to rotate anticlockwise, the right end face of the guide cushion block 18 forms an inclined guide face 28 which can guide the positioning rod 34 to enter the spiral groove 19, at the moment, the rotary sleeve 36 is located at the leftmost end, and the outer end part of the positioning rod 34 is located in the flat groove 45.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a single-stage centrifugal pump, including the pump body, pump cover, impeller, pump shaft and motor, be equipped with the outlet chamber of pump chamber and left inlet chamber of intercommunication pump chamber and intercommunication pump chamber upside in the pump body, the impeller is joined in marriage in the pump chamber, the pump cover is located on the opening of pump body right side, the pump shaft is rotatable to be worn to locate on the pump cover, and pump shaft left end links to each other with the impeller transmission, and the pump shaft right-hand member links to each other its characterized in that with motor drive: the pump cover is internally provided with a rotating sleeve and a control sleeve, the rotating sleeve can be sleeved on the pump shaft in a linkage manner, the control sleeve is sleeved on the rotating sleeve, the control sleeve is fixedly connected with the pump cover, an axial driving structure is arranged between the control sleeve and the rotating sleeve, the rotating sleeve can axially reciprocate between the pump shaft and the control sleeve, the rotating sleeve is provided with a resetting component, the left end of the rotating sleeve is respectively and hermetically attached to the pump shaft and the control sleeve, when the rotating sleeve moves rightwards, the left side of the rotating sleeve forms an air suction cavity, the corresponding left side surface of the pump cover is provided with a one-way air inlet valve and a one-way exhaust valve, the one-way air inlet valve is communicated with the air suction cavity and the pump cavity, and the one-way exhaust valve is communicated with the air suction cavity and the outside; the axial driving structure comprises a spiral groove arranged on the inner circle of the control sleeve and a positioning rod radially penetrating the rotary sleeve, the positioning rod can be radially movably arranged, the positioning rod is provided with a first return spring, when the outer end of the positioning rod extends out of the rotary sleeve, the positioning rod is in transmission fit with the spiral groove, the left end of the spiral groove is provided with a flat groove, the flat groove is selectively connected with the spiral groove through a guide cushion block which is rotatably arranged, the left side of the guide cushion block is provided with a driving block which drives the guide cushion block to rotate, the guide cushion block is connected with a third return spring, the driving block can rotate to enter and exit the control sleeve and the pump cover, the corresponding control sleeve and the pump cover are provided with hollows, the driving block is provided with a transmission mechanism, the transmission mechanism takes liquid in the outlet cavity as a power source, the right end of the spiral groove is provided with an arc inclined surface which drives the positioning rod to retract into the rotary sleeve, when the outer end of the positioning rod retracts into the rotary sleeve, the inner end of the positioning rod extends into the rotary sleeve and is arranged in a limiting port arranged on the excircle of the pump shaft, a clamping part is arranged at the upper end of the corresponding positioning rod, the clamping part is in limiting fit with the inner circle of the rotary sleeve, when the clamping part touches the left side wall of the limiting port, the clamping limiting is released, and the left side wall of the limiting port corresponds to the flat groove; drive mechanism is including feed liquor chamber, push pedal, division board and stay cord, the feed liquor chamber is located the export chamber right side, and is equipped with the feed liquor hole of intercommunication export chamber on the wall of feed liquor chamber left side, is equipped with the external breathing hole of intercommunication on the wall of feed liquor chamber right side, the push pedal can be controlled and is moved and set up in the feed liquor intracavity, and the push pedal sets up second reset spring, the division board can be controlled and move and penetrate the isolated cooperation with it in the export oral cavity, and the division board right-hand member links to each other with the push pedal transmission, stay cord one end links to each other with the push pedal transmission, and the stay cord other end links to each other with the drive block transmission, and corresponding feed liquor chamber intercommunication has a rope passageway, and the movable sealing plug that is equipped with in the rope passageway, the stay cord is fixed to be worn to locate on the sealing plug, the cover is equipped with the spring coil on the pump cover, and the spring coil is disposed in the drive block outside.

2. A single stage centrifugal pump as claimed in claim 1, wherein: the clamping part comprises a clamping tooth and a fourth reset spring, the clamping tooth can move left and right and is arranged in a groove in the left side face of the outer end of the positioning rod, and the fourth reset spring is connected between the clamping tooth and the groove.

3. A single stage centrifugal pump as claimed in claim 1, wherein: the reset assembly comprises a horizontal push spring and a plane bearing, the plane bearing is connected to the right end of the rotating sleeve, and the horizontal push spring is connected between the plane bearing and the pump cover.