CN212360199U

CN212360199U - Multistage centrifugal pump for brine injection

Info

Publication number: CN212360199U
Application number: CN202022147865.4U
Authority: CN
Inventors: 严琦
Original assignee: Tianjin Shengtai Food Machinery Co ltd
Current assignee: Tianjin Shengtai Food Machinery Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-01-15
Anticipated expiration: 2030-09-27

Abstract

The utility model belongs to the food processing field relates to a multistage centrifugal pump is used in brine injection, include: motor, water pump axle, yoke disc, base, first impeller, a plurality of pump housing group and front bezel, wherein, water pump axle pot head is established in the motor output shaft outside, and the water pump axle other end runs through yoke disc and base, and first impeller and a plurality of pump housing group set up in the airtight space that base and front bezel formed, and pump case group includes: the pump shell is in a half-barrel shape, a sealing disk surface is arranged on the bottom side of the pump shell, a spiral water channel is welded on the inner side of the sealing disk surface, the second impeller is arranged on the inner side of the pump shell, and the first impeller and the second impeller are sleeved on the outer side of the other end of the water pump shaft. According to the utility model discloses multistage centrifugal pump for the brine injection can carry the ropy salt solution that contains insoluble particulate matter, and suitable technology is extensive, can realize the provision of experiment type minirun ability salt solution injection machine, also can realize the supply of the high economic benefits of batch industrial production's salt solution injection machine for mill.

Description

Multistage centrifugal pump for brine injection

Technical Field

The utility model belongs to the food processing field relates to a multistage centrifugal pump is used in salt solution injection.

Background

The saline pump device is a core liquid supply configuration of the saline injection machine, and when the injection machine runs, injection liquid needs to be pressurized by the saline pump and then sent to the liquid inlet pipeline. The opening time of the liquid valve is controlled in a linkage manner, so that the injection is accurately and uniformly injected into the raw meat, and the completion of the pickling process is ensured. The different forms and modes of operation of the brine pump determine the range of applicability and performance limitations of the injector.

The saline pump of the traditional injection machine mainly adopts the following forms:

a vortex pump: the vortex pump is mainly characterized by low flow and high lift, but because the liquid has larger impact loss in the flow channel and lower efficiency, the vortex pump is not suitable for conveying viscous liquid and liquid containing solid particles. Due to the characteristics, the vortex pump is only suitable for a small-capacity customer group of pure brine, the energy consumption is high, and the cost performance of equipment is not high.

Single-stage centrifugal pumps: the volute casing converts pressure energy and speed generated by high-speed rotation of the internal impeller into static pressure energy and pressure difference between the static pressure energy and the central area of the pump body when the casing liquid discharge port discharges liquid, so that conveying liquid is continuously sucked into the center of the pump body and is discharged at a certain pressure, and stable flow and pressure are formed. However, the pressure of the single-stage centrifugal pump is not high, and the injection pressure of 7-10 kg required by the injection process cannot be completed, and a plurality of manufacturers adopt a structure with an energy storage tank added at the back, so that the conditions that the structure is complicated, the cleaning is improper, the bacteria are easy to propagate, and a large amount of injection is wasted are caused.

A reciprocating pump: the liquid end directly transports the injection, and the power end utilizes hydraulic system or electromagnetic transmission system to transmit kinetic energy to the liquid end, and the shortcoming is: the structure of the power end is complex, the transmission efficiency is low, the injection pressure is unstable, continuous injection cannot be completed, the high conveying capacity of saline cannot be completed at high speed, and the cost performance is low.

Gear pump: the volume of the liquid suction cavity is increased to feed liquid through the meshing motion of the driving and driven gears, the volume of the liquid discharge cavity is reduced to discharge liquid, and the continuous stable operation is realized to stabilize the liquid discharge pressure and flow.

SUMMERY OF THE UTILITY MODEL

Problem (A)

Aiming at the defects of the brine pumps, the application aims to disclose a novel stainless steel multistage centrifugal pump for brine injection.

(II) technical content

According to an aspect of the utility model, a multistage centrifugal pump for brine injection is disclosed, include: motor 14, water pump shaft 1, yoke disc 2, base 3, first impeller 5, a plurality of pump housing group and preceding dish 9, wherein, 1 pot head of water pump shaft is established in the 14 output shafts of motor outside, and the 1 other end of water pump shaft runs through yoke disc 2 and base 3, and first impeller 5 and a plurality of pump housing group set up in the airtight space of base 3 and preceding dish 9 formation, and pump housing group includes: the water pump comprises a pump shell 4 and a second impeller 4-2, wherein the pump shell 4 is in a half-barrel shape, a sealing disc surface is arranged at the bottom side of the pump shell 4, a spiral water channel 4-1 is welded at the inner side of the sealing disc surface, the second impeller 4-2 is arranged at the inner side of the pump shell 4, and a first impeller 5 and a second impeller 4-2 are sleeved at the outer side of the other end of the water pump shaft 1.

According to the exemplary embodiment of the present invention, water pump shaft 1 includes: the external diameter is in proper order degressive counter bore section, linkage segment, the straight section of keyway and compress tightly the fixed segment, and wherein, counter bore section inboard is equipped with the counter bore, and the counter bore aperture matches with 14 output shafts of motor, and counter bore section lateral wall symmetry is equipped with logical groove.

According to the utility model discloses an exemplary embodiment, the inner conical surface design that adopts of counter bore section, counter bore section both ends are fixed in the 14 output shaft outsides of motor through lower locking discs 6 and last locking discs 7 respectively, and lower locking discs 6 and last locking discs 7 pass through bolt fastening.

According to the utility model discloses an exemplary embodiment, yoke disc 2 is the drum structure, and 2 side end faces of yoke disc and the laminating of 14 output shaft place terminal surfaces of motor, 2 another side end faces of yoke disc and the laminating of base 3.

According to the utility model discloses an exemplary embodiment, the tray 2 middle part is equipped with square viewing aperture.

According to the utility model discloses an exemplary embodiment, the seal cover is welded to 3 bottoms of base, and the seal cover inboard is equipped with the 15 quiet ring structures of mechanical seal, and the 15 rotating ring structures of mechanical seal pass through the jump ring to be fixed in the 14 output shaft outsides of motor, and 3 upper portions of base are equipped with the outlet.

According to the exemplary embodiment of the present invention, an O-ring is provided on the outer wall of the pump housing 4.

According to an exemplary embodiment of the present invention, the first impeller 5 and the second impeller 4-2 are of a semi-open design.

According to the exemplary embodiment of the present invention, the middle of the front plate 9 is provided with an opening connected with the discharge hole of the injection liquid tank, and the inner side surface of the front plate 9 is a conical surface.

According to an exemplary embodiment of the present invention, the multistage centrifugal pump for brine injection further comprises: and the pressure plate 10 is arranged outside the front plate 9, and is fixed with one end face of the connecting plate 2 through a pull rod 8.

(III) advantageous effects

According to the utility model discloses multistage centrifugal pump for brine injection adopts annular housing, independently designs semi-open impeller, disconnect-type transmission drive's structure, and the advantage lies in unified casing impeller design, can reach the realization of equipment technological parameter through the increase and decrease of water pump progression according to the technological requirement of different model injection machines, at customer's user, through converter control water pump motor rotational speed to realize the injection pressure injection volume of different technological requirements, simple energy-conservation; the device can convey viscous saline containing insoluble particles, is wide in application process, can realize the provision of experimental small-yield saline injection machines, and can also realize the supply of high economic benefits of factory saline injection machines in large-scale industrial production.

Compared with the prior art, the utility model discloses multistage centrifugal pump for brine injection has following advantage:

the combined use of the multistage centrifugal pump for brine injection can meet the wide process pressure flow requirement, and the process adjustment requirement can be met and the energy consumption can be saved through the control of the frequency converter; the injection pump can meet the technological requirements of various injections, the injection containing particles can also complete a high-pressure conveying injection process, and the service life of the water pump reaches more than 10 years;

the reasonable radian design of the pump, the water channel and the impeller can reasonably meet the special design requirement, and has small vibration, low noise and less energy consumption;

the installation adjustment is convenient simple, through the fine machined original paper, assembles the adjustment very easily, reduces the technical requirement to the professional, more does benefit to the utilization in man-hour and the improvement of efficiency, and more advantageously has ensured uniformity and stability.

Drawings

Fig. 1 is an exploded view of a multistage centrifugal pump for brine injection according to an embodiment of the present invention;

fig. 2 is an assembled structural schematic view of a multistage centrifugal pump for brine injection according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a water pump shaft according to an embodiment of the present invention.

In the figure:

1: a water pump shaft; 2: disc connection; 3: a base; 4: a pump housing; 4-1: a spiral water channel; 4-2: a second impeller; 5: a first impeller; 6: a lower lock disc; 7: locking the disc; 8: a pull rod; 9: a front plate; 10: a platen; 11: pressing a nut; 13: an adjustment pad; 14: a motor; 15: mechanical sealing; 30: a lying key.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and the corresponding embodiments, wherein the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the multistage centrifugal pump for saline injection according to the present invention sequentially comprises from left to right: the water pump comprises a motor 14, a lower lock disc 6, a water pump shaft 1, an upper lock disc 7, a coupling disc 2, a base 3, a mechanical seal 15, a first impeller 5, 4 groups of pump shell groups, a front disc 9 and a pressure plate 10. It will be understood by those skilled in the art that the number of pump casing sets can be adjusted according to actual requirements.

Each pump housing group includes: the pump shell 4 is in a half-barrel shape, a sealing plate surface is arranged at the bottom side of the pump shell 4, a spiral water channel 4-1 is welded on the inner side of the sealing plate surface, and the second impeller 4-2 is arranged on the inner side of the pump shell 4. The first impeller 5 and the second impeller 4-2 are sleeved outside one end of the water pump shaft 1.

The respective components will be described in detail below.

1. Electric machine

The motor 14 can be a YVP series vertical and horizontal dual-purpose variable frequency motor.

2. Water pump shaft

The water pump shaft 1 can adopt a stainless steel water pump shaft, and the water pump shaft 1 is divided into four sections. The counter bore is processed into to the first section of left end (corresponds counter bore section) internal design, and the aperture becomes accurate cooperation with the motor shaft that cooperatees the installation, and the logical groove of counter bore end processing symmetry makes things convenient for the suit motor shaft, and the corresponding design in length position of the first section outside cooperation motor shaft of left end is processed into the conical surface to the lower locking plate after power supply motor shaft inserts the installation of water pump shaft 1 is fixed with the locking of upper locking plate. The second section (corresponding to the connecting section) at the left end is designed and processed into a straight section with the diameter of 30mm and is used for installing mechanical seal between the coupling disc base and the water pump shaft 1 to prevent injection from leaking. The third section (corresponding to the straight section of the key groove) at the left end is designed and processed into a straight section with the key groove, the annular pump shell and the impeller are sequentially assembled on the water pump shaft 1 at the section through keys according to the design requirement, and the pump shells are sealed by adopting a 0-shaped ring. The fourth section (corresponding to the compressing and fixing section) at the left end is designed and processed into a screw rod structure and is used for compressing and fixing the last impeller.

3. Upper lock disc and lower lock disc

The upper lock disc 7 and the lower lock disc 6 are made of stainless steel, 6M 8 screw holes are designed and processed, the upper lock disc and the lower lock disc are sleeved at two ends of a first section of the left end of the water pump shaft 1, the upper lock disc and the lower lock disc are fixed by 6M 8 bolts according to the clamping principle of conical surfaces, the purpose of locking and fixing the motor transmission shaft and the water pump shaft 1 is achieved after the bolts are locked, and meanwhile, M8 elastic pads are additionally arranged on the bolts to prevent the bolts from loosening and tripping.

4. Combined plate

The linking plate 2 can be made of stainless steel, is designed and processed into a cylindrical structure, the left end face of the linking plate is grooved to match with the rim of the motor for positioning, the middle of the plate surface is drilled to match with the lower lock plate mounting position, the periphery of the plate surface is drilled, and the chassis and the motor front plate are tightly connected by using 4M 16 bolts. The square viewing aperture is opened at 2 middle parts of header, and the effect is for using the lock dish of observing in the dimension guarantor, and whether the joining in marriage of motor shaft is not hard up, and whether mechanical seal has the seepage and needs to be changed. A hole is drilled in the middle of the right end face of the connecting disc 2, the connecting disc is used for positioning a sleeved base, 6 screw holes of M12 are uniformly distributed on a designed processing plane, and 6 pull rods are used for clamping and fixing a pump shell and an impeller.

5. Base seat

The base 3 is the last level pump case of water pump, and the design processing is annular stainless steel structure, and the left end face drilling welds the processing seal cover, and the seal cover outside is installed with the yoke disc cooperation, and the inboard mechanical seal 15 quiet ring structure of installation of seal cover, and the 15 rotating ring structural mounting of mechanical seal is at the left end second section of water pump shaft to fix the rotating ring on the water pump shaft with the jump ring. The upper part of the base 3 is provided with a water outlet, a connecting pipe is welded, and the injection passes through a plurality of impeller pump shells through a suction inlet, is gradually pressurized to the water outlet, is discharged from a water pump and enters a conveying pipeline. And a counter bore is processed on the ring wall at the rightmost side of the base, the counter bore is used for positioning and matching of the previous pump shell, and an O-shaped ring sealing ring groove is processed on the counter bore surface and used for sealing between the pump shells.

6. Pump casing

The pump case 4 adopts a semi-closed annular structure, the structure is a semi-barrel type, the left side is sealed and welded with the disc surface, the smooth surface is processed on the left side of the disc surface, the spiral water channel 4-1 is welded on the right side (as shown in figure 1, the spiral water channel 4-1 can adopt a plate type design, a plurality of spiral blades can be arranged around the spiral water channel 4-1), after injection is sucked into the first-stage pump channel, water flow with certain pressure is formed under the action of centrifugal force of an impeller, the spiral water channel 4-1 is designed and utilized, the pressurized water flow can be effectively introduced into the second pump channel, secondary pressurization conveying is carried out under the action of the impeller, and the discharge pressure required by design is reached through multiple times of drainage pressurization. The spiral water channel 4-1 is reasonable in design and processing, and vibration noise and unnecessary energy consumption caused by hammering can be avoided. The water channel welding needs to enter a finish machining process to carry out precision machining on a plane and a vertical plane so as to ensure the consistency of each stage of operation parameters of the pump shell and the interchangeability of later replacement and maintenance. The outer surface of the left side of the integral structure is mounted with a counter bore of a base in a matching mode after turning, the counter bore and an O-shaped ring sealing channel are machined on the ring wall of the right side, and the O-shaped ring sealing channel is mounted with a next pump shell in a matching mode after being mounted with the O-shaped ring sealing channel.

7. Impeller (comprising a first impeller 5 and a second impeller 4-2)

The first impeller 5 and the second impeller 4-2 are designed to be semi-open impellers, the impellers are made of stainless steel materials, and the consistency of the density of the impellers and the radian of the impeller pieces is guaranteed through precision casting. The precise end face, the inner hole, the key groove and the dynamic balance test are sequentially arranged in the pump shell and are fixed on the water pump shaft through key installation. The radian and the thickness of the impeller are well designed to meet the requirement of special pressure and flow of the brine injection machine, and the consistency of the impeller can be ensured by the processing means, so that the stable state, small vibration and noise and interchangeability of later maintenance in the operation process of the brine pump are achieved.

It should be noted that the impeller is used as the only action component, the pump does work on the liquid through the rotating impeller, and the impeller has three types: closed, open, semi-open.

The closed impeller can be composed of blades, a front cover plate and a rear cover plate. The semi-open impeller consists of blades and a back cover plate. The open impeller has no front and back cover plates. The closed impeller has high efficiency, the open impeller has low efficiency, and the semi-open impeller has efficiency between the closed impeller and the open impeller. The semi-open impeller has the advantages of simple structure, stable manufacturing process and better control of dynamic and static balance of the impeller.

8. Front plate

The front disc 9 can be made of stainless steel, the front disc 9 is a front cover of a first pump channel, a hole is drilled in the middle of the front cover, a water inlet pipe matched with the flow of the pump is welded, and the other end of the pipeline is connected with a discharge hole of an injection liquid tank. The front disc is in a conical surface form, the radian is matched with the radian of the impeller, smooth flow of water flow in the pump channel is perfectly realized, and turbulence can not be caused to consume kinetic energy to generate noise. The front disc is arranged in a counter bore of the pump shell and is sealed with the pump shell through an O-shaped ring.

9. Pressure plate

Pressure disk 10 adopts stainless steel, and pressure disk 10 is a fixing device, and terminal surface machined plane about pressure disk 10, centre processing hole, the suit is on the preceding dish right side, and the hole is 6 in the border processing for 6 pull rods pass the back, lock a plurality of pump casings on the 2 right-hand members face of yoke plate with M12 nut, add the bullet pad, prevent to shake not hard up.

10. Pull rod

The pull rod 8 is made of stainless steel. The left end M12 of the pull rod is screwed and fixed on the coupling plate, the other end M12 of the pull rod is screwed and fixed on the coupling plate, the elastic pad penetrates through the pressure plate and is fastened by an M12 nut, a plurality of pump shells are fixed on the coupling plate in a balanced mode, and a plurality of pressurizing pump channels are formed in a sealed mode, so that the pressurizing conveying of the injection is completed.

11. Pressing nut

The gland 11 adopts stainless steel, and the design processing is left side tep reel hole M16 screw for the cooperation water pump shaft 1 fourth section 16 screws compresses tightly the impeller, and the hexagonal face is processed into in the outside design, makes things convenient for the instrument fastening.

12. Adjusting pad

The utility model discloses an adjustment pad 13 can adopt a plurality of stainless steel, and the adjustment pad is a disc structure, and middle drilling is installed on the water pump axle mechanical seal right side in the base, through the adjustment of adjustment pad thickness, can eliminate the motor shaft, the base, the accumulative total machining error of pump case to guarantee pump case water course plane and the planar requirement of clearance precision of impeller apron, guarantee mechanical safety and design technological parameter's is up to standard.

(II) according to the utility model discloses the installation as follows of multistage centrifugal pump is used in the brine injection:

the qualified shaft end of the motor 14 is detected to be upwards arranged on the ground, the water pump shaft 1 is arranged on the motor shaft, the lower lock disc 6 and the upper lock disc 7 are additionally arranged, the water pump shaft is fastened by the hexagon socket head cap screw and the elastic pad, and the jump difference of the fourth section of screw rod on the left side of the water pump shaft 1 is detected to be within a design allowable range.

And (5) mounting the connecting plate 2 and fastening by using bolts, elastic pads and nuts.

The base 3 is installed, and the mechanical seal 15 is installed on the base 3 and the water pump shaft 1. Installing an adjusting pad 13, installing a horizontal key 30, installing a first impeller 5, adjusting the height of the adjusting pad 13 or correcting the thickness of the left plane of the base 3, and after finishing, installing a pump shell and an impeller in the later step without readjusting.

An O-shaped ring 16 is arranged in an O-shaped ring groove of the base 3, and a pump shell 4 and a second impeller 4-2 are arranged. A plurality of pump casings 4 and second impellers 4-2 are sequentially installed according to requirements. And the final second impeller 4-2 is installed, and the front disc 9 is installed on an O-shaped ring of the pump shell 4. The six pull rods 8 are sequentially screwed into screw holes of the yoke disc 2, the gland 10 is installed on the front disc, the pull rods 8 sequentially penetrate through holes of the pressure disc 10, and the six pull rods are locked by nuts 28 of M12 elastic pads 29 and M12.

And installing a pressing nut 11, screwing the pressing nut 11 on a screw rod at the fourth section on the left side of the water pump shaft 1 through a water inlet of the front disc 9, and screwing by using a special spanner. And after the water pump is installed, the water pump enters the next test bench to test the pressure flow, and the water pump is put in a warehouse for standby after the test is completed.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A multistage centrifugal pump for brine injection, characterized by comprising: motor (14), water pump shaft (1), yoke disc (2), base (3), first impeller (5), a plurality of pump housing group and front wall (9), wherein, a pot head of water pump shaft (1) is established in motor (14) output shaft outside, and water pump shaft (1) other end runs through yoke disc (2) and base (3), and first impeller (5) and a plurality of pump housing group set up in the airtight space of base (3) and front wall (9) formation, and pump housing group includes: the water pump comprises a pump shell (4) and a second impeller (4-2), wherein the pump shell (4) is in a half-barrel shape, a sealing disk surface is arranged on the bottom side of the pump shell (4), a spiral water channel is welded on the inner side of the sealing disk surface, the second impeller (4-2) is arranged on the inner side of the pump shell (4), and the first impeller (5) and the second impeller (4-2) are sleeved on the outer side of the other end of the water pump shaft (1).

2. The multistage centrifugal pump for brine injection according to claim 1, characterized in that the water pump shaft (1) comprises: the outer diameter is in proper order degressive counter bore section, linkage segment, the straight section of keyway and compress tightly the fixed segment, and wherein, counter bore section inboard is equipped with the counter bore, and the counter bore aperture matches with motor (14) output shaft, and counter bore section lateral wall symmetry is equipped with logical groove.

3. The multistage centrifugal pump for saline injection according to claim 2, wherein the inner end of the counter bore section is designed as a conical surface, the two ends of the counter bore section are fixed to the outer side of the output shaft of the motor (14) through a lower lock disc (6) and an upper lock disc (7), and the lower lock disc (6) and the upper lock disc (7) are fixed through bolts.

4. The multistage centrifugal pump for brine injection according to claim 1, wherein the disc (2) is of a cylindrical structure, one end face of the disc (2) is attached to the end face where the output shaft of the motor (14) is located, and the other end face of the disc (2) is attached to the base (3).

5. The multistage centrifugal pump for brine injection according to claim 4, wherein the middle part of the header (2) is provided with a square viewing port.

6. The multistage centrifugal pump for saline injection as claimed in claim 1, wherein a sealing sleeve is welded at the bottom end of the base (3), a mechanical seal (15) stationary ring structure is arranged inside the sealing sleeve, a mechanical seal (15) moving ring structure is fixed outside the output shaft of the motor (14) through a snap spring, and a water outlet is arranged at the upper part of the base (3).

7. The multistage centrifugal pump for brine injection according to claim 1, wherein an O-ring is provided on the outer wall of the pump casing (4).

8. Multistage centrifugal pump for brine injection according to claim 1, characterized in that the first impeller (5) and the second impeller (4-2) are of semi-open design.

9. The multistage centrifugal pump for brine injection according to claim 1, wherein the front disk (9) is provided with an opening in the middle thereof, the opening being connected to the discharge port of the injection liquid tank, and the inner side surface of the front disk (9) is a tapered surface.

10. The brine injection multistage centrifugal pump of claim 1, further comprising: and the pressing plate (10) is arranged on the outer side of the front plate (9) and is fixed with one end face of the connecting plate (2) through a pull rod (8).