Stuffing box of slurry pump

Abstract

The utility model belongs to the technical field of slurry pumps, and provides a stuffing box of a slurry pump. The stuffing box comprises an annular main body, and a top gland and at least one side gland which are matched with the annular main body; the annular main body comprises an annular plate and a filler cylinder, and the filler cylinder vertically extends along the inner circle of the annular plate; the top gland is matched with the unoccupied end of the filler cylinder; the side gland comprises a side plate and a convex rib, and the convex rib vertically extends along the middle part of one side surface of the side plate; a plurality of notches are further formed in the barrel wall of the filler barrel; the side glands and the notches are arranged in a one-to-one correspondence mode. The side face, provided with the protruding ribs, of the side plate abuts against and is matched with the outer side face of the barrel wall of the packing barrel, and the protruding ribs are matched with the notches in a clamped mode. The packing replacement device has the advantages of being high in replacement efficiency, low in difficulty and free of packing damage during packing replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry pumps, in particular to a stuffing box of a slurry pump. Background Art

[0002] Slurry pumps are commonly used equipment in mineral processing production lines, used to lift slurry to a certain height to improve the operating efficiency of subsequent equipment. However, since slurry pumps are essentially centrifugal pumps, they are affected by the gap between the pump cavity and the centrifugal shaft, and it is inevitable that slurry will overflow from the pump cavity.

[0003] In order to prevent the slurry from overflowing, the centrifugal shaft of the slurry pump needs to be sealed. At present, the stuffing box-based stuffing seal is the most widespread, reliable and economical way of shaft sealing. Specifically, the stuffing box of the slurry pump includes a main body and a gland. The main body is interference-fitted on the centrifugal shaft, and a plurality of annular packings are respectively sleeved on the centrifugal shaft and filled between the main body and the centrifugal shaft; the gland is pressed against the empty surface of the outermost packing.

[0004] In daily operation, after a period of operation, the packing is often affected by packing wear, packing extrusion and deformation, and new packing needs to be replaced to ensure the sealing effect of the pump chamber. However, when replacing packing in the prior art, on the one hand, because the packing adapter is installed between the packing box and the centrifugal shaft, the installation space is small; and the packing is squeezed for a long time in production, and it is difficult to remove the old packing, so there is often a defect of low replacement efficiency when replacing the packing. On the other hand, during the replacement process, it is often necessary to make a homemade sharp hook on site to hook out the packing, which not only requires experience and skills, but also makes replacement difficult, and also damages the reusable packing, increasing production costs. Utility Model Content

[0005] The utility model aims to provide a stuffing box for a slurry pump, so as to improve the technical problems of low replacement efficiency, great difficulty and easy damage to the stuffing when the stuffing in the current stuffing box is replaced.

[0006] In order to achieve the above purpose, the utility model proposes the following technical solutions:

[0007] In a first aspect, the technical solution provides a stuffing box for a slurry pump. The stuffing box comprises an annular body, a top gland and at least one side gland matched with the annular body;

[0008] The annular body comprises an annular plate and a packing tube, wherein the packing tube is vertically extended along the inner circle of the annular plate; the top pressure cover is adapted to the free end of the packing tube;

[0009] The side pressure cover includes a side plate and a convex rib, wherein the convex rib is vertically extended along the middle of one side surface of the side plate; a plurality of notches are also provided on the wall of the stuffing tube; the side pressure cover and the notches are provided in one-to-one correspondence; wherein a side surface of the side plate on which the convex rib is provided is in abutment with the outer side surface of the wall of the stuffing tube, and the convex rib is snap-fitted with the notch.

[0010] Furthermore, it comprises a side pressure cover, and a notch is provided on the wall of the filling cylinder.

[0011] Furthermore, it comprises: a sealing gasket; the sealing gasket is adapted to be arranged on the convex rib.

[0012] Furthermore, the sealing pad is a rubber pad.

[0013] Furthermore, the sealing gasket is a U-shaped sealing gasket.

[0014] Furthermore, the side plate is provided with a groove; the groove is arranged along the outer side of the convex rib, and the width of the groove is adapted to the width of the U-shaped sealing gasket.

[0015] Furthermore, the width of the notch ranges from 1.5 cm to 3 cm.

[0016] Furthermore, the annular body, the top pressure cover and the side pressure cover are all made of carbon steel.

[0017] Furthermore, the side plate is provided with a plurality of through holes, and the wall of the filling cylinder is provided with a plurality of blind holes;

[0018] The through holes and the blind holes are arranged in a one-to-one correspondence for the fixing members to pass through.

[0019] In a second aspect, the technical solution also provides a slurry pump; the slurry pump includes the stuffing box.

[0020] Beneficial effects:

[0021] The utility model improves the existing stuffing box of the slurry pump to solve the technical defects of low replacement efficiency, great difficulty and easy damage to the stuffing when replacing the stuffing in the current stuffing box.

[0022] The stuffing box is mainly composed of an annular body, a top pressure cover and at least one side pressure cover. The top pressure cover and the side pressure cover are matched with the annular body. Specifically, the annular body includes an annular plate and a stuffing tube, and the stuffing tube is vertically extended along the inner circle of the annular plate; the top pressure cover is adapted to the free end of the stuffing tube. The side pressure cover includes a side plate and a convex rib, and the convex rib is vertically extended along the middle of one side of the side plate; a plurality of notches are also provided on the wall of the stuffing tube. The side pressure cover is arranged in a one-to-one correspondence with the notches; the side surface of the side plate provided with the convex rib abuts and cooperates with the outer side surface of the wall of the stuffing tube, and the convex rib is snap-fitted with the notch. At this time, when the stuffing needs to be replaced, it is only necessary to remove the top pressure cover and the side pressure cover that cooperate with the annular body respectively, and observe the specific situation of the stuffing filled therein through the notch, and then use the replacement tool to apply force to the outer wall of the stuffing to take out the stuffing. During this process, due to the setting of the side pressure cover and the corresponding notch, while ensuring the shaft sealing effect of the stuffing box, the extrusion and deformation of the stuffing can be overall grasped through the notch, improving the blind picking caused by the narrow space and improving the replacement efficiency; and when the force is applied, the stuffing adapted to be filled between the centrifugal shaft and the stuffing box is given an effective visual action point, reducing the difficulty of replacement and causing no damage to the stuffing.

[0023] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0024] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned through practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0026] Figure 1 It is a partial structural schematic diagram of the stuffing box of the slurry pump described in this embodiment.

[0027] Figure 2 It is a schematic diagram of the structure of the stuffing box of the slurry pump described in this embodiment when being disassembled or assembled.

[0028] The reference numerals in the figure are: 1 is an annular body, 2 is a top pressure cover, 3 is a side pressure cover, 4 is a sealing gasket, 5 is a centrifugal shaft, 6 is a water seal ring, 7 is a filler, and 8 is a fixing part; 11 is an annular plate, 12 is a filler cylinder, 31 is a side plate, and 32 is a convex rib; 12a is a blind hole, 12b is a notch, 31a is a through hole, and 31b is a groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with general skills in the field to which the utility model belongs.

[0030] The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "a", "an" or "the" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprise" include the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] The widely used existing slurry pump stuffing box usually has a cylindrical ring (sleeve structure) for installing the stuffing, and the stuffing is installed between the stuffing box and the centrifugal shaft. During production, the stuffing is under pressure for a long time, and the space for installing the stuffing is small. It is very inconvenient and time-consuming to replace the stuffing. It is often necessary to make a homemade sharp hook on site to hook out the stuffing, which not only requires experience and skills, but also damages the stuffing that can be used again, resulting in a long downtime for maintenance and affecting production. Therefore, this embodiment aims to provide an improved slurry pump stuffing box to improve the above technical defects at the same time.

[0032] The slurry pump stuffing box disclosed in the utility model is further specifically introduced below in conjunction with the embodiments shown in the accompanying drawings.

[0033] like Figure 1-2 As shown, the stuffing box includes an annular body 1, a top pressure cover 2 and a side pressure cover 3; wherein the top pressure cover 2 and the side pressure cover 3 are both matched with the annular body 1. In terms of quantity setting, the top pressure cover 2 is one, and the side pressure cover 3 can be one or more.

[0034] In terms of specific structural settings, the annular body 1 includes an annular plate 11 and a stuffing tube 12. The stuffing tube 12 is vertically extended along the inner circle of the annular plate 11. The top pressure cover 2 is adapted to the remaining end of the stuffing tube 12. The side pressure cover 3 includes a side plate 31 and a convex rib 32; the convex rib 32 is vertically extended along the middle of one side of the side plate 31. A plurality of notches 12b are also provided on the wall of the stuffing tube 12. The side pressure cover 3 is arranged one-to-one corresponding to the notches 12b. Specifically, one side of the side plate 31 provided with the convex rib 32 is abutted against the outer side of the wall of the stuffing tube 12, and the convex rib 32 is snap-fitted with the notch 12b.

[0035] During the operation of the slurry pump, the annular body 1 is sleeved on the centrifugal shaft 5, and the filler 7 is fitted on the centrifugal shaft 5 to fill the gap between the annular body 1 and the centrifugal shaft 5. As a preferred embodiment, in order to further improve the shaft sealing effect, a water seal ring 6 is fitted on the centrifugal shaft 5 before the filler 7 is sleeved.

[0036] When removing the worn or deformed packing, first, only the top pressure cover 2 and the side pressure cover 3 that match the annular body 1 need to be removed respectively; then, the specific situation of the packing 7 filled therein can be observed through the notch 12b; finally, the packing 7 can be removed by applying a force to the outer wall of the packing 7 with the help of a replacement tool. It can be seen that in this process, due to the setting of the side pressure cover 3 and the corresponding notch 12b, while ensuring the shaft sealing effect of the stuffing box, the extrusion, deformation, etc. of the packing 7 can be grasped as a whole through the notch 12b, which improves the blind removal phenomenon caused by the narrow space and improves the replacement efficiency; and when applying the force, the packing 7 that is adapted to be filled between the centrifugal shaft 5 and the stuffing box is given an effective visual action point, which reduces the difficulty of replacement and does not cause damage to the packing.

[0037] In this embodiment, there is one side gland 3 and one notch 12b is provided on the wall of the packing tube 12. At this time, while ensuring high efficiency, low difficulty and no damage replacement of the packing, it is also beneficial to reduce the risk of slurry leakage from the notch 12b and the side gland 3.

[0038] After experimental analysis, the technicians found that when the width of the notch 12b is in the range of 1.5cm-3cm, the shaft sealing effect is relatively good while ensuring effective visualization of the filler. Therefore, the width of the notch 12b is preferably set in the range of 1.5cm-3cm. In the specific implementation of this embodiment, the width of the notch 12b is specifically set to 2cm.

[0039] As a preferred embodiment, in order to prevent the slurry from overflowing from the side gland 3, the stuffing box is provided to further include a sealing gasket 4. During assembly and use, the sealing gasket 4 is adapted to be mounted on the convex rib 32.

[0040] As a specific implementation method, the sealing gasket 4 described in this embodiment is a rubber gasket in terms of material; and the sealing gasket 4 described in this embodiment is a U-shaped sealing gasket in terms of structure. At the same time, in order to avoid the risk that the side plate 31 introduced by adding the sealing gasket 4 cannot fit the outer wall of the stuffing tube 12, a groove 31b is also provided on the side plate. Specifically, the groove 31b is provided along the outer side of the rib 32, and the width of the groove 31b is adapted to the width of the U-shaped sealing gasket. In order to ensure that the sealing gasket 4 placed in the groove 31b still has good extrusion deformation during the installation and use of the side pressure cover 3 after the groove 31b is added; the depth of the groove 31b is set to be less than the thickness of the sealing gasket 4.

[0041] In this embodiment, in order to improve the strength of each structure, the annular body 1 and the side pressure cover 3 are both manufactured and processed by the integrated processing technology. That is, the annular plate 11 and the stuffing tube 12 are integrally processed and formed, and the side plate 31 and the protruding rib 32 are also integrally processed and formed. At the same time, based on the consideration of integral processing, in terms of material selection, the annular body 1 and the side pressure cover 3 are both made of carbon steel. At this time, since carbon steel has good forgeability, corrosion resistance and ductility, the structural integrity of the processed annular body 1 and the side pressure cover 3 is guaranteed. Furthermore, since carbon steel has the characteristics of low price, it is also beneficial to reduce processing costs; in particular, it has good cutting processability, so it is convenient to open the notch 12b on the stuffing tube 12, and it is convenient to open the groove 31b on the side plate 31.

[0042] In this embodiment, the top pressure cover 2 includes a second annular body and a plurality of protrusions arranged at intervals along the outer wall of the second annular body. The second annular body is used to abut against the free annular surface of the outermost filler during installation and use. Similarly, the material of the top pressure cover 2 is also carbon steel, and the second annular body and the protrusions are also integrally formed.

[0043] As another optional implementation, in order to improve the overall structural strength of the annular body 1, the annular body 1 is provided with a plurality of reinforcing ribs. The plurality of reinforcing ribs are evenly spaced, and any of the reinforcing ribs is simultaneously connected to the annular plate 11 and the filling tube 12. Specifically, the reinforcing ribs, the annular plate 11 and the filling tube 12 are also manufactured and processed by an integrated processing and molding technology.

[0044] In order to achieve a fixed connection between the side pressure cover 3 and the annular body 1, a plurality of through holes 31a are provided on the side plate 31, and a plurality of blind holes 12a are provided on the wall of the filling tube 12. The through holes 31a and the blind holes 12a are provided in a one-to-one correspondence for the fixing member 8 to pass through. At this time, the fixing member 8 will pass through the corresponding through holes 31a and blind holes 12a in sequence to achieve a fixed connection between the side pressure cover 3 and the annular body 1.

[0045] In order to achieve a fixed connection between the top cover 2 and the annular body 1, a second through hole is also provided on the protruding portion, and a clamp is correspondingly provided on the outer wall of the stuffing tube 12. The second fixing member is passed through the second through hole and placed in the clamp to achieve the fixation of the two.

[0046] In a specific implementation, the fixing member 8 and the second fixing member are both bolts; at this time, the corresponding through hole 31a, blind hole 12a, and second through hole are all threaded holes.

[0047] This embodiment also provides a slurry pump. The slurry pump includes the above-mentioned stuffing box. Since the slurry pump includes the stuffing box, the slurry pump has the advantages of lower difficulty in daily maintenance, higher efficiency in daily maintenance, and higher utilization rate of consumable parts during daily operation.

[0048] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A stuffing box for a slurry pump, characterized in that: It comprises an annular body, a top pressure cover and at least one side pressure cover matched with the annular body; The annular body comprises an annular plate and a packing tube, wherein the packing tube is vertically extended along the inner circle of the annular plate; the top pressure cover is adapted to the free end of the packing tube; The side pressure cover includes a side plate and a convex rib, wherein the convex rib is vertically extended along the middle of one side surface of the side plate; a plurality of notches are also provided on the wall of the stuffing tube; the side pressure cover and the notches are provided in one-to-one correspondence; wherein a side surface of the side plate on which the convex rib is provided is in abutment with the outer side surface of the wall of the stuffing tube, and the convex rib is snap-fitted with the notch.

2. The stuffing box of the slurry pump according to claim 1, characterized in that: The packing cylinder comprises a side pressure cover, and a notch is provided on the cylinder wall of the packing cylinder.

3. The stuffing box of the slurry pump according to claim 1, characterized in that: include: Gasket; The sealing gasket is adapted to be mounted on the convex rib.

4. The stuffing box of the slurry pump according to claim 3, characterized in that: The sealing pad is a rubber pad.

5. The stuffing box of the slurry pump according to claim 3, characterized in that: The sealing gasket is a U-shaped sealing gasket.

6. The stuffing box of the slurry pump according to claim 5, characterized in that: The side plate is provided with a groove; the groove is arranged along the outer side of the convex rib, and the width of the groove is adapted to the width of the U-shaped sealing gasket.

7. The stuffing box of a slurry pump according to claim 1, characterized in that: The width of the notch ranges from 1.5 cm to 3 cm.

8. The stuffing box of a slurry pump according to claim 1, characterized in that: The annular body, the top pressure cover and the side pressure cover are all made of carbon steel.

9. The stuffing box of a slurry pump according to claim 1, characterized in that: The side plate is provided with a plurality of through holes, and the wall of the filling cylinder is provided with a plurality of blind holes; the through holes and the blind holes are arranged in a one-to-one correspondence for the fixing parts to pass through.

10. A slurry pump, characterized in that: A stuffing box for a slurry pump comprising any one of claims 1-9.

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