CN114294239A - Shield slurry conveying pump - Google Patents
Shield slurry conveying pump Download PDFInfo
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- CN114294239A CN114294239A CN202111666647.4A CN202111666647A CN114294239A CN 114294239 A CN114294239 A CN 114294239A CN 202111666647 A CN202111666647 A CN 202111666647A CN 114294239 A CN114294239 A CN 114294239A
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Abstract
The invention provides a shield slurry conveying pump, which belongs to the technical field of pumps and comprises a pump shell, a pump cover, a connecting structure and a shaft seal structure, wherein the pump shell is provided with a pump cover; the inlet and the outlet of the pump shell are provided with split flanges; the connecting structure comprises extension arms arranged at the front end and the rear end of the pump shell, a connecting arm arranged on the outer side of the pump cover and attached to the extension arms, and a plurality of sealing clamping pieces; the bearing seal structure includes preceding water seal ring, packing clamping ring and gland packing, and the gland packing is located the outside of preceding water seal ring and packing clamping ring to enclose out sealed chamber with preceding water seal ring and packing clamping ring, be equipped with the filler in the sealed chamber, the inboard of filler is equipped with spouts the pottery layer. According to the shield slurry conveying pump, only the sealing clamping piece and the split flange need to be manufactured independently, so that holes are prevented from being punched in the pump shell and the pump cover, and the processing difficulty and the processing cost are reduced; and meanwhile, the filler is sealed, and the spray ceramic layer is arranged between the filler and the pump shaft, so that the smoothness and the wear resistance of the pump shaft are improved, and the filler replacement frequency is reduced.
Description
Technical Field
The invention belongs to the technical field of pumps, and particularly relates to a shield slurry delivery pump.
Background
In tunnel construction, the soil slag excavated by the balance shield machine is conveyed to the ground through a pipe section by a shield slurry conveying pump. The basic structure of the present shield slurry conveying pump is composed of pump shells, pump shafts, bearing boxes, brackets, rotor assemblies such as impellers in the pump shells, power comprises motors, coupling wheels or adhesive tape wheel couplings and the like, and the working principle is as follows: when the impeller rotates rapidly, the medium is promoted to rotate rapidly by the blades, the rotating medium flies out of the impeller under the action of centrifugal force, after the medium in the pump is thrown out, a vacuum area is formed at the central part of the impeller, and the medium is pressed into the feeding pipe through the pipe network under the action of atmospheric pressure (or water pressure), so that continuous feeding can be realized through circulating supply, and the lift and the flow required by process design are achieved. However, the pump shell and the pump cover of the existing shield slurry conveying pump are mostly connected through bolts, so that holes need to be formed in the pump shell and the pump cover, the machining is difficult, the problem of poor sealing performance often occurs after the holes are formed, the noise during working is large, the service life of equipment is short, and the maintenance cost is high.
Disclosure of Invention
The invention aims to provide a shield slurry conveying pump, and aims to solve the problems of poor sealing performance and short service life of the conventional shield slurry conveying pump.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a shield slurry delivery pump, including:
the inlet and the outlet of the pump shell are provided with split flanges; pump covers are arranged at the front end and the rear end of the pump shell;
the connecting structure comprises extension arms arranged at the front end and the rear end of the pump shell, a connecting arm arranged on the outer side of the pump cover and attached to the extension arms, and a plurality of sealing clamping pieces circumferentially sleeved on the extension arms and the outer sides of the connecting arms;
the shaft seal structure is arranged at the rear end of the pump shell and comprises a front water seal ring, a packing press ring and a packing box, the packing box is arranged on the outer sides of the front water seal ring and the packing press ring and surrounds a sealing cavity with the front water seal ring and the packing press ring, packing is arranged in the sealing cavity, and a spray ceramic layer is arranged between the packing and the shaft sleeve.
As another embodiment of the application, the outer side of the sealing clamping piece is provided with a limiting ring.
As another embodiment of the application, the packing box is connected with the packing compression ring through a square bolt, and one side of the packing box is provided with a rectangular limiting groove for limiting a bolt head.
As another embodiment of the present application, the filler is made of aramid fiber.
As another embodiment of the present application, the method further includes:
the protective cover is in a semi-annular shape and is connected to the bracket and covers the outer side of the shaft seal structure.
As another embodiment of the present application, the shield includes:
the side plate is arranged above the shaft seal structure and is in a semi-annular shape, and mounting plates are arranged at two ends of the side plate and are connected with the bracket;
and the rear baffle is arranged at the rear end of the side plate, is positioned in front of the bearing box and is attached to the pump shaft.
As another embodiment of the present application, an impeller is disposed within the pump housing, and the impeller includes three impeller blades.
As another embodiment of the application, a front cover plate of the impeller is provided with a front back blade, and the outer side of the front back blade is provided with a protective layer.
As another embodiment of the present application, the method further includes:
an adjusting member connecting the pump case and the bracket, the adjusting member having a degree of freedom along a length direction thereof for adjusting a distance between the impeller and a front guard of the pump case.
As another embodiment of the present application, a water collection box with an open upper end is disposed on the bracket, and the water collection box is located below the shaft seal structure.
The shield slurry conveying pump provided by the invention has the beneficial effects that: compared with the prior art, the shield slurry conveying pump has the advantages that the sealing clamping pieces and the split flanges are arranged, and only the sealing clamping pieces and the split flanges need to be manufactured separately, so that the pump shell and the pump cover are prevented from being punched, and the processing difficulty and the processing cost are reduced; meanwhile, the filler seal is adopted, and the spray ceramic layer is arranged between the filler and the pump shaft, so that the smoothness and the wear resistance of the pump shaft are improved, the service life of the filler is prolonged, the filler replacement frequency is reduced, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a shield slurry delivery pump according to an embodiment of the present invention;
FIG. 2 is a side view of a shield slurry pump provided in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a shield slurry pump provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a shaft seal structure according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a protective cover according to an embodiment of the present invention;
fig. 6 is a top view of a protective cover according to an embodiment of the present invention.
In the figure: 10. a pump housing; 11. the flanges are split; 12. an impeller; 20. a pump cover; 21. a limiting ring; 22. sealing the clamping piece; 30. a bearing housing; 40. a bracket; 41. adjusting the bolt; 50. a stuffing box; 51. a protective cover; 52. packing and pressing a ring; 53. a square bolt; 54. a front baffle; 55. a side plate; 56. a tailgate; 57. mounting a plate; 58. and a limiting pressure plate.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 6, a shield slurry pump according to the present invention will now be described. The shield slurry conveying pump comprises a pump shell 10, a pump cover 20, a connecting structure and a shaft seal structure; the inlet and outlet of the pump shell 10 are provided with split flanges 11; pump covers 20 are arranged at the front end and the rear end of the pump shell 10; the connecting structure comprises extension arms arranged at the front end and the rear end of the pump shell 10, a connecting arm arranged at the outer side of the pump cover 20 and attached to the extension arms, and a plurality of sealing clamping pieces 22 circumferentially sleeved on the outer sides of the extension arms and the connecting arm; the shaft seal structure is located between pump case 10 and the bearing box 30, and the shaft seal structure includes preceding water seal ring, packing clamping ring 52 and stuffing box 50, and the outside of water seal ring and packing clamping ring 52 before stuffing box 50 locates to enclose out sealed chamber with preceding water seal ring and packing clamping ring 52, be equipped with the filler in the sealed chamber, the inboard of filler is equipped with spouts the pottery layer.
Compared with the prior art, the shield slurry pump provided by the invention is mainly used for developing the underground traffic and conveying the soil and the mixture of the soil residue and the muddy water generated in the tunnel excavation engineering, the pump shell 10 and the pump cover 20 both need to be made of high-hardness materials and meet the abrasion resistance, but the pump shell 10 and the pump cover 20 are difficult to punch; therefore, the front end and the rear end of the pump shell 10 are both provided with extension arms extending outwards, the free ends of the extension arms are attached to connecting arms extending outwards on the pump cover 20, and when the extension arms and the connecting arms are completely attached, the pump shell 10 is in a sealed state; in order to guarantee the extension arm and the connecting arm to laminate completely, a plurality of sealing fasteners 22 used for connecting the extension arm and the connecting arm are arranged on the outer sides of the extension arm and the connecting arm, a limiting groove is formed in the inner side of each sealing fastener 22, the extension arm and the connecting arm are laminated, another side wall of the extension arm and the connecting arm is respectively laminated with two side arms of the limiting groove, and the limiting groove and the extension arm and the connecting arm located in the limiting groove are in interference fit. The sealing clamping pieces 22 are arranged on the circumferential direction of the pump cover 20 at equal intervals, so that the pump shell 10 is stressed uniformly.
The split flanges 11 are arranged at the inlet and the outlet of the pump shell 10 and are connected with the conveying pipe section by means of the split flanges 11, so that the inlet and the outlet of the pump shell 10 are prevented from being perforated, and the sealing performance of the joint of the pump shell 10 and the conveying pipe section is improved.
A stuffing box 50 is arranged at the shaft sleeve joint of the pump shaft at the rear end of the pump shell 10, two ends of the stuffing box 50 are respectively connected with a front water seal ring and a stuffing press ring 52 to form a seal cavity, stuffing is placed in the seal cavity, and the stuffing has certain pressure under the action of the stuffing press ring 52 to plug a gap of the pump shaft and prevent liquid in the pump from leaking; and ceramic spraying treatment is carried out on the outer side wall of the shaft sleeve on the inner side of the filler, so that a ceramic spraying layer is formed between the filler and the shaft sleeve, the wear resistance and the surface smoothness of the shaft sleeve are improved, the wear of the filler is reduced, and the replacement frequency of the filler is reduced.
According to the shield slurry pump, the sealing clamping piece 22 and the split flange 11 are arranged, and only the sealing clamping piece 22 and the split flange 11 need to be manufactured independently, so that holes are prevented from being punched in the pump shell 10 and the pump cover 20, and the processing difficulty and the processing cost are reduced; meanwhile, the filler seal is adopted, and the spray ceramic layer is arranged between the filler and the pump shaft, so that the smoothness and the wear resistance of the pump shaft are improved, the service life of the filler is prolonged, the filler replacement frequency is reduced, and the working efficiency is improved.
Optionally, the shield slurry conveying pump is a single shell, the pump cover 20 and the pump shell 10 are made of high-chromium wear-resistant materials, the hardness of the materials is high, and the heat treatment hardness is greater than or equal to 56 HRC. The pump shell 10 can bear pressure and resist wear, and can bear the pressure of 1.6 MPa; the flow passage component volute, the impeller 12, the front guard plate and the rear guard plate are made of novel wear-resistant metals KB04 and KB17, and the materials are high in hardness and toughness and achieve the effects of being safe and reliable to use, long in service life and the like.
Optionally, one split flange 11 includes two symmetrical flange components of a whole that can function independently, and the flange components of a whole that can function independently is the semi-annular, and two tip of flange components of a whole that can function independently all are equipped with connecting portion, and when two flange components of a whole that can function independently were laminated, connecting portion on two flange components of a whole that can function independently laminated each other. The connecting part is provided with a bolt hole. During installation, bolts penetrate through the bolt holes in the two attached connecting portions and are locked to achieve installation of the split flange 11.
The inlet and outlet of the pump shell 10 are provided with outer edges, the inner side walls of the corresponding split flanges 11 are provided with limiting grooves, and the outer edges are attached to the limiting grooves to prevent the flanges from being separated from the inlet and outlet of the pump shell 10.
The split flange 11 can be cut and manufactured by steel plates, and has simple process and low cost.
Optionally, the outer side of the sealing jaw 22 is provided with a limiting ring 21.
A plurality of sealing clamping pieces 22 are arranged on the limiting ring 21 at equal intervals, and when the sealing clamping pieces 22 are arranged on one periphery of the pump cover 20, the limiting ring 21 surrounds the pump cover 20, the sealing clamping pieces 22 are compressed, and the connecting arm and the extension arm are attached to the outer side end of the connecting arm.
Optionally, the limiting ring 21 includes four limiting arc plates connected in sequence, each limiting arc plate is connected with a plurality of sealing clamping pieces 22, and fixing pieces are arranged at two ends of each limiting arc plate. When the pump cover is installed, the four limiting arc plates are sequentially arranged in the circumferential direction of the pump cover 20, and the distances between every two adjacent sealing clamping pieces 22 are equal. Two adjacent limiting arc plates are connected through bolts. The bolts sequentially penetrate through the bolt holes in the two fixing pieces to connect the two limiting arc plates, and the sealing clamping piece 22 is tightly pressed on the outer sides of the connecting arm and the extension arm.
In some possible embodiments, referring to fig. 4, the stuffing box 50 is connected to the packing press ring 52 by means of a square bolt 53, and one side of the stuffing box 50 is provided with a rectangular groove for limiting the bolt head.
Specifically, the front end of the stuffing box 50 is connected with the front water seal ring, the rear end of the stuffing box 50 is connected to the stuffing press ring 52 through a bolt, and one end of the bolt extending out of the stuffing press ring 52 is provided with a lock nut. The locknut cooperates with the bolt to compress the packing clamping ring 52 against the packing inside the stuffing box 50.
Optionally, a locking part is arranged at the rear end of the packing box 50, wherein a rectangular groove is formed in one side of the locking part, which is far away from the packing compression ring 52, the rectangular groove is communicated with a bolt hole in the locking part, and a bolt sequentially penetrates through the rectangular groove and the bolt hole and extends to the packing compression ring 52; the corresponding bolt adopts a square bolt 53, when the locking is carried out, the head of the square bolt 53 is limited in the rectangular groove, and the square bolt 53 sequentially penetrates through the rectangular groove, the bolt hole and the packing press ring 52 and is locked by means of a locking nut.
Optionally, the filler is made of aramid fiber material, the aramid fiber material has strong mechanical properties including strong abrasion resistance and tear resistance, and the aramid fiber material is used as the filler, so that the abrasion resistance can be improved, the frequency of field replacement of the filler is reduced, the working efficiency is improved, and the service life of the pump is prolonged.
Alternatively, after the packing is loaded into the packing chamber, it is compressed axially by the square bolt 53, and when there is relative movement between the shaft and the packing, it generates a radial force due to the plasticity of the packing and is in close contact with the shaft. At the same time, the lubricant impregnated in the filler is squeezed out, forming an oil film between the contact surfaces. Because the contact state is not particularly uniform, a 'boundary lubrication' state, namely a 'bearing effect', occurs at the contact part; the concave part which is not contacted forms a small oil groove with a thicker oil film, and the contact part and the non-contact part form an irregular labyrinth to play a role in preventing liquid flow from leaking, which is called as a labyrinth effect. A good seal is to maintain good lubrication and proper compression. If the lubrication is poor or the pressure is too tight, the oil film is interrupted, dry friction between the filler and the shaft is caused, and finally the shaft is burnt and serious abrasion is caused.
Therefore, the degree of compaction of the filler needs to be adjusted frequently so that after the lubricant in the filler runs off for a period of time, some lubricant is squeezed out while compensating for the relaxation of the compaction force of the filler due to the volume change. Obviously, this often squeezes the filler, eventually depleting the impregnant, so periodic filler replacement is necessary. In addition, it is also necessary to intentionally allow a small amount of leakage at the packing in order to maintain the liquid film and carry away the frictional heat.
In order to solve the problem of leakage at the packing, a protection cover 51 is provided outside the shaft seal structure, the protection cover 51 is semi-annular, and the protection cover 51 is connected to the bracket 40, as shown in fig. 5 and 6.
The protection cover 51 is arranged above the shaft seal structure, and the shaft seal structure is covered inside the protection cover to prevent the shaft seal structure from being exposed and damaged. The long-time high-efficient operation of bearing seal structure has been guaranteed, has prolonged the change cycle of packing, has improved work efficiency. Meanwhile, the protective cover 51 prevents shaft seal water leaked from the filler from entering the bearing box 30, so that bearings in the bearing box 30 are protected, and the service life of the pump is prolonged.
The protective cover 51 comprises a side plate 55 and a rear baffle 56, wherein the side plate 55 is arranged above the shaft seal structure, the side plate 55 is in a semi-annular shape, mounting plates 57 are arranged at two ends of the side plate 55, and the mounting plates 57 are connected with the bracket 40; the rear baffle 56 is provided at the rear end of the side plate 55, and the rear baffle 56 is located in front of the bearing housing 30 and attached to the pump shaft.
When the filler is in a water spraying state, water sprayed from the filler is blocked by the side plate 55 and the rear baffle 56 of the water blocking structure, so that the water is prevented from being sprayed onto the bearing box 30; the water sprayed onto the side plate 55 or the rear baffle 56 flows down along the side plate 55 or the rear baffle 56 under the influence of its own weight until it drips from the side plate 55 or the rear baffle 56
Two mounting plates 57 are provided on both lower end faces of the side plate 55, respectively. In order to facilitate mounting and centering adjustment, the mounting plate 57 is provided with oblong holes, and bolts penetrate through the oblong holes and are connected to bolt holes in the support. During installation, the relative positions of the mounting plate 57 and the bolts are adjusted by means of the oblong holes so that the upper ends of the two side plates 55 are in a sealing engagement and the upper ends of the two rear flaps 56 are in a sealing engagement. The length direction of the long round hole is vertical to the length direction of the pump shaft. Two long round holes are arranged at intervals along the length direction of the mounting plate 57, and the two long round holes are symmetrically arranged.
Optionally, a front baffle 54 is provided at the front end of the side plate 55, and the front baffle 54 is attached to the rear end of the pump housing 10.
Optionally, the front baffle 54, the rear baffle 56 and the side plate 55 are made of steel plates with a thickness of 2 mm.
In some possible embodiments, referring to fig. 5, the side plates 55 include a first side plate 55 and a second side plate 55 symmetrically disposed, the first side plate 55 and the second side plate 55 are both arc-shaped plates, and a central angle corresponding to the first side plate 55 and a central angle corresponding to the second side plate 55 are both 90 °.
In order to improve the connection strength between the first side plate 55 and the second side plate 55, a limiting pressing plate 58 is arranged at the upper end of the first side plate 55, and the limiting pressing plate 58 is pressed at the upper end of the second side plate 55. Specifically, the limit pressure plate 58 is attached to the upper end surface of the first side plate 55 and extends outward. When the waterproof cover is installed, the second side plate 55 is installed first, and then the first side plate 55 is placed on one side of the second side plate 55 and is made symmetrical to the second side plate 55; the first side plate 55 is attached so that the first side plate 55 abuts against the second side plate 55, and the limit pressing plate 58 is pressed against the upper end surface of the second side plate 55.
Optionally, the limiting pressure plate 58 is arc-shaped, and two ends of the limiting pressure plate 58 are respectively attached to the upper end of the first side plate 55 and the upper end of the second side plate 55.
Optionally, the limiting pressure plate 58 is welded to the first side plate 55.
And the lower ends of the first side plate 55 and the second side plate 55 are respectively connected with a first mounting plate 57 and a second mounting plate 57, and the first side plate 55 and the second side plate 55 are connected on the pump bracket 40 by means of the first mounting plate 57 and the second mounting plate 57 and are abutted, and meanwhile, a limiting pressing plate 58 on the first side plate 55 presses the upper end of the second side plate 55.
The bearing seal structure is covered in the water retaining structure, and when the filler is sealed and abraded, the filler can be replaced only by opening the first mounting plate 57, so that the filler replacement efficiency is improved.
The side plates 55 include a first side plate 55 and a second side plate 55 which are symmetrically arranged, correspondingly, the rear baffle 56 includes a first rear baffle 56 arranged at the rear end of the first side plate 55 and a second rear baffle 56 arranged at the rear end of the second side plate 55, and the first rear baffle 56 and the second rear baffle 56 are abutted.
The first and second endgates 56, 56 are two arc-shaped plates that are symmetrically disposed. The first tailgate 56 is connected to the first side plate 55 at the outside thereof and attached to the pump shaft at the inside thereof. When the first side plate 55 and the second side plate 55 abut against each other, the first tailgate 56 abuts against the second tailgate 56, forming a half-ring structure.
Correspondingly, baffle 54 before the preceding baffle 54 is including locating the first preceding baffle 54 of first curb plate 55 front end and locating the second preceding baffle 54 of second curb plate 55 front end, and the upper end of baffle 54 before first preceding baffle 54 and the second all is equipped with the front end and steps down the portion, and when first curb plate 55 and second curb plate 55 butt, two front ends step down the portion intercommunication and form the front end groove of stepping down.
Correspondingly, the front ends of the first side plate 55 and the second side plate 55 are both provided with middle yielding parts, when the first side plate 55 and the second side plate 55 are abutted, the middle yielding parts are communicated to form a middle yielding groove, the middle yielding groove is communicated with the front end yielding groove, and a U-shaped yielding groove with a forward opening is formed.
The upper ends of the first and second rear baffles 56 and 56 are provided with rear end yielding parts, and when the two rear baffles 56 are abutted, the two rear end yielding parts are communicated to form a U-shaped yielding groove with a downward opening.
In some possible embodiments, referring to fig. 3, an impeller 12 is disposed within the pump casing 10, the impeller 12 including three impeller blades.
The number of the blades of the impeller 12 is usually 3-5, and as the slurry conveyed by the conveying pump of the shield machine contains soil residue and the like, the impeller with three blades has wide impeller flow channel, strong flow capacity and good cavitation performance, and can meet the requirements of conveying slag slurry media with strong abrasion, gravel, large particles or high temperature.
In some possible embodiments, referring to fig. 3, the front cover plate of the impeller 12 is provided with front and back blades, and the outer sides of the front and back blades are provided with protective layers.
In particular, the back-vane may reduce pressure at the packing, facilitate packing sealing, and may reduce axial forces of the pump. In order to ensure the performance of the pump, the gap between the front end and the back cover plate is adjusted to be minimum, generally 2-3mm, so that the gap between the back blade and the back cover plate is increased, the back blade has more sealing effect, and the height of the back blade is larger than that of the front back blade and is generally more than twice of the height of the front back blade.
Alternatively, the width of the dorsal leaf is 6 mm.
Optionally, no large particle solids are present in the region of the back vane due to the rotation of the vane, but the fine particle concentration increases with increasing radius, the thickness of the back vane increases from a small radius to a large radius, and the back vane wears less than the vane. After the front end gap of the impeller 12 is abraded, leakage amount is increased, large-particle solid can appear in the front back blade area, abrasion of the back blade is accelerated, therefore, a protective layer is arranged on the outer side of the front back blade, the thickness of the protective layer is 5-10mm, and the service life of the blade is prolonged due to the arrangement of the protective layer.
In some possible embodiments, referring to fig. 3, the shield slurry pump further comprises an adjusting member connecting the pump housing 10 and the bracket 40, the adjusting member having a degree of freedom along its length for adjusting the distance between the impeller 12 and the front shroud of the pump housing 10.
Specifically, the adjusting member is an adjusting bolt 41, and one end of the adjusting bolt 41 is connected to the bracket 40 and the other end is connected to the pump housing 10. After the blades are worn, the distance between the blades and the front guard plate is increased, the leakage amount is increased, large-particle solids appear in the front and back blade areas, and the wear of the back blades is accelerated; the adjusting bolt 41 adjusts the distance between the pump shell 10 and the bracket 40, and drives the pump shell 10 and the impeller 12 to displace, so as to reduce the gap between the impeller 12 and the front guard plate and improve the service life and efficiency of the pump.
In some possible embodiments, a sump box with an open upper end is provided below the shaft seal between the bracket 40 and the pump housing 10, and the sump box is bolted to the bracket 40.
The water at the filler is dripped or sprayed backwards in a dripping shape, and when the filler is in a dripping state, the water drips seep from the filler and vertically drip into the water collecting box; when the filler is in a water spraying state, water sprayed from the filler is blocked by the side plate 55 and the rear baffle 56 of the water blocking structure, so that the water is prevented from being sprayed onto the bearing box 30; the water sprayed onto the side plate 55 or the rear baffle 56 flows downwards along the side plate 55 or the rear baffle 56 under the influence of self gravity until dropping from the side plate 55 or the rear baffle 56 into the water collecting box.
The lower extreme of water-collecting box is equipped with the drain pipe, and the drain pipe communicates with the inner chamber of water-collecting box.
The inside of the water collecting box is provided with an inner cavity for containing water, and the inner cavity is communicated with an opening at the upper end of the water collecting box. The lower end of the inner cavity is communicated with a water conduit which penetrates through the water collecting box, and the end part of the water conduit extends out of the lower end surface of the water collecting box. One end of the water conduit extending out of the water collecting box is connected with a pipe joint at the end part of the water drain pipe.
Optionally, an opening and closing valve is arranged on the pipe joint. The water outlet pipe can discharge shaft seal water in the water collecting box at regular time by means of the opening and closing valve.
Optionally, the drain is a hose.
For the collection efficiency that improves the shaft seal water, all set up the guide plate at the lower extreme of two curb plates 55 of water retaining structure, the guide plate extends downwards until the inside of water-collecting box. The shaft seal water on the side plate 55 flows downwards to the guide plate along the inner side wall of the side plate 55 and flows into the water collection box along the guide plate. And the splashing of the shaft seal water during dripping is avoided.
The guide plate is located the both sides of packing, and in the water droplet on the packing fell into the box that catchments, the drop of water that splashes can splash to the guide plate on, flows into the box that catchments along the guide plate again.
The baffle extends axially to the rear of the backplate 56 for shielding water droplets dripping from the backplate 56 and splashed water droplets.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Shield constructs defeated stuff pump, its characterized in that includes:
the pump comprises a pump shell (10), wherein split flanges are arranged at an inlet and an outlet of the pump shell (10); pump covers (20) are arranged at the front end and the rear end of the pump shell (10);
the connecting structure comprises extension arms arranged at the front end and the rear end of the pump shell (10), a connecting arm arranged on the outer side of the pump cover (20) and attached to the extension arms, and a plurality of sealing clamping pieces (22) sleeved on the outer sides of the extension arms and the connecting arm along the circumferential direction;
the shaft seal structure is arranged at the rear end of the pump shell (10), and comprises a front water seal ring, a packing press ring (52) and a packing box (50), wherein the packing box (50) is arranged on the outer sides of the front water seal ring and the packing press ring (52), a sealing cavity is defined by the front water seal ring and the packing press ring (52), a packing is arranged in the sealing cavity, and a spray ceramic layer is arranged between the packing and the shaft sleeve.
2. The shield slurry pump according to claim 1, wherein a stop collar (21) is provided on the outside of the seal retainer (22).
3. The shield slurry pump according to claim 1, characterized in that the stuffing box (50) is connected with the packing pressing ring (52) by means of a square bolt (53), and one side of the stuffing box (50) is provided with a rectangular limiting groove for limiting the bolt head.
4. The shield slurry pump of claim 1, wherein the filler is an aramid material.
5. The shield slurry pump of claim 1, further comprising:
the protective cover (51), the protective cover (51) is the semicircle form, the protective cover (51) is connected on bracket (40) and cover and establish in the outside of bearing seal structure.
6. The shield slurry pump according to claim 5, wherein the shield (51) comprises:
the side plate (55) is arranged above the shaft seal structure, the side plate (55) is semi-annular, mounting plates (57) are arranged at two ends of the side plate (55), and the mounting plates (57) are connected with the bracket (40);
and the rear baffle (56) is arranged at the rear end of the side plate (55), and the rear baffle (56) is positioned in front of the bearing box (30) and is attached to the pump shaft.
7. The shield slurry pump of claim 1, wherein an impeller (12) is disposed within the pump housing (10), the impeller (12) comprising three impeller blades.
8. The shield slurry pump according to claim 7, wherein a front-back blade is provided on a front cover plate of the impeller (12), and a protective layer is provided on an outer side of the front-back blade.
9. The shield slurry pump of claim 8, further comprising:
an adjustment member connecting the pump housing (10) and a bracket (40), the adjustment member having a degree of freedom along a length direction thereof for adjusting a distance between the impeller (12) and a front guard of the pump housing (10).
10. The shield slurry pump according to claim 9, wherein the bracket (40) is provided with a water collection box having an open upper end, the water collection box being located below the shaft seal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111666647.4A CN114294239A (en) | 2021-12-30 | 2021-12-30 | Shield slurry conveying pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111666647.4A CN114294239A (en) | 2021-12-30 | 2021-12-30 | Shield slurry conveying pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294239A true CN114294239A (en) | 2022-04-08 |
Family
ID=80973811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111666647.4A Pending CN114294239A (en) | 2021-12-30 | 2021-12-30 | Shield slurry conveying pump |
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| Country | Link |
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| CN (1) | CN114294239A (en) |
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| US20030129068A1 (en) * | 2002-01-10 | 2003-07-10 | Oehman Robert E. | Pump mount using sanitary flange clamp |
| CN102066769A (en) * | 2008-06-13 | 2011-05-18 | 伟尔矿物澳大利亚私人有限公司 | Improvements relating to pump seal assemblies |
| CN103790863A (en) * | 2012-10-29 | 2014-05-14 | 山东双轮股份有限公司 | Loose-piece-type pump body connection device |
| CN105370623A (en) * | 2015-11-02 | 2016-03-02 | 武汉船用机械有限责任公司 | Cover plate locking system for immersed pump and immersed pump |
| CN206972498U (en) * | 2017-05-17 | 2018-02-06 | 成都植源机械科技有限公司 | A kind of pump with high pressure self-locking type flange |
| CN208793237U (en) * | 2018-08-06 | 2019-04-26 | 河北锐瑟机械科技有限公司 | A kind of good wear-resisting efficient non-plugging centrifugal pump of axle envelope effect |
| KR20190140189A (en) * | 2018-06-11 | 2019-12-19 | 최종성 | Sealing structure of pipe joint using flange |
| CN110630510A (en) * | 2019-09-27 | 2019-12-31 | 强大泵业集团行唐泵业有限公司 | Horizontal slurry pump |
| CN111396320A (en) * | 2020-04-27 | 2020-07-10 | 石家庄开发区石泵泵业有限公司 | Slurry pump with adjustable direction and excellent overall performance |
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2021
- 2021-12-30 CN CN202111666647.4A patent/CN114294239A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030129068A1 (en) * | 2002-01-10 | 2003-07-10 | Oehman Robert E. | Pump mount using sanitary flange clamp |
| CN102066769A (en) * | 2008-06-13 | 2011-05-18 | 伟尔矿物澳大利亚私人有限公司 | Improvements relating to pump seal assemblies |
| CN103790863A (en) * | 2012-10-29 | 2014-05-14 | 山东双轮股份有限公司 | Loose-piece-type pump body connection device |
| CN105370623A (en) * | 2015-11-02 | 2016-03-02 | 武汉船用机械有限责任公司 | Cover plate locking system for immersed pump and immersed pump |
| CN206972498U (en) * | 2017-05-17 | 2018-02-06 | 成都植源机械科技有限公司 | A kind of pump with high pressure self-locking type flange |
| KR20190140189A (en) * | 2018-06-11 | 2019-12-19 | 최종성 | Sealing structure of pipe joint using flange |
| CN208793237U (en) * | 2018-08-06 | 2019-04-26 | 河北锐瑟机械科技有限公司 | A kind of good wear-resisting efficient non-plugging centrifugal pump of axle envelope effect |
| CN110630510A (en) * | 2019-09-27 | 2019-12-31 | 强大泵业集团行唐泵业有限公司 | Horizontal slurry pump |
| CN111396320A (en) * | 2020-04-27 | 2020-07-10 | 石家庄开发区石泵泵业有限公司 | Slurry pump with adjustable direction and excellent overall performance |
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