Tar residue pressing pump

Abstract

The utility model discloses a tar residue pressing pump. The technical problem that in the prior art, countersunk bolts of an oil residue pressing pump are loosened, and consequently structural parts are damaged is solved. The tar residue pressing pump comprises a pump shell provided with a pressing cavity, a feeding port and a discharging port, and the feeding port and the discharging port are communicated with the pressing cavity; the rotor is positioned in the squeezing cavity; the stator assembly is located in the squeezing cavity and comprises multiple stators and multiple limiting units, the multiple stators and the multiple limiting units are connected to the pump shell through threaded fasteners, and the multiple stators are arranged outside the rotor in a clearance winding mode with the rotating axis of the rotor as the center; a limiting unit is arranged between any two adjacent stators, the limiting unit comprises a plurality of limiting pieces, and the plurality of limiting pieces are arranged at intervals in the rotating axis direction of the rotor so as to limit the tangential movement trend of the stators. The tar squeezing pump stator is good in working stability, and the threaded fastener is not prone to loosening.

Description

Technical Field

[0001] This application belongs to the field of pressing pump technology, specifically relating to a tar residue pressing pump. Background Technology

[0002] Tar pressing pumps are essential equipment for pressing and crushing tar residue in the gas purification section of the coking industry. This equipment mainly presses and crushes large pieces of tar residue or graphite blocks carried in the ammonia water from the coke oven, and then transports the crushed tar residue back to the tar-ammonia water separation system to reduce system blockage and facilitate the centrifugal separation of tar by the super centrifuge.

[0003] In related technologies, the core components of a tar pressing pump are four stators (sector-shaped grooved components) and one toothed wheel (rotor). The four sector-shaped grooved components form a cylindrical assembly with several annular grooves on the inner wall of the pump casing. The end of the pump shaft extends into the middle of the pump casing, and a toothed wheel is installed at the end of the shaft. This toothed wheel interlocks with the annular grooves on the inner side of the cylindrical assembly. After the motor starts, it drives the pump shaft to rotate. The tar residue is crushed and transported by the toothed wheel rotating with the pump shaft and the stationary sector-shaped grooved components.

[0004] Among them, the four fan-shaped groove parts are fixed to the pump casing at the inlet end by eight countersunk bolts. There is a large gap between two adjacent stators in the circumferential direction, which can easily cause the eight countersunk bolts that fix the stator to loosen. If not detected in time, the stator can easily collide with the toothed wheel and be damaged. It can also easily cause the stator to wear the inlet pump cover, sealing end cover and pump casing, resulting in losses ranging from 100,000 to 500,000 yuan. Summary of the Invention

[0005] To address the technical problem of damage to structural components caused by loose countersunk bolts in tar residue pressing pumps, this application provides a tar residue pressing pump.

[0006] In a first aspect of this application, a tar residue pressing pump is provided, comprising:

[0007] The pump casing is provided with a pressing chamber and an inlet and an outlet communicating with the pressing chamber;

[0008] The rotor is located inside the pressing chamber;

[0009] A stator assembly is located within the pressing chamber. The stator assembly includes a stator and multiple limiting units. Multiple stators are connected to the pump housing by threaded fasteners. Along the circumference of the rotor, the stators and limiting units are staggered outside the rotor. Each limiting unit includes multiple limiting members, which are spaced apart along the rotation axis of the rotor to restrict the tangential movement tendency of the stator.

[0010] In some embodiments, the limiting member is connected to one of two adjacent stators, and the limiting member is frustoconical, with the smaller end of the frustoconical limiting member close to the other of the two stators.

[0011] In some embodiments, the gap between the small end of the frustum-shaped limiting member and the other of the two stators is 0.05 to 0.1 mm.

[0012] In some embodiments, the limiting member is welded to the stator.

[0013] In some embodiments, the dimension of the limiting member along the rotation axis of the rotor is 10mm to 20mm.

[0014] In some embodiments, two limiting members are provided between two adjacent stators.

[0015] In some embodiments, the pump housing includes a housing, an inlet cover, and a mounting ring. The inlet cover has the feed port, and the mounting ring is located between the housing and the inlet cover. The inner side of the mounting ring extends into the housing, and the stator is connected to the portion of the mounting ring that extends into the housing by threaded fasteners.

[0016] In some embodiments, the connecting end of the inlet cover extends into the housing, the outer periphery of the inlet cover is provided with an annular protrusion, the mounting ring is located between the annular protrusion and the housing, and the threaded fastener is located between the housing and the connecting end.

[0017] In some embodiments, the rotor is provided with crushing teeth, the stator is provided with a communicating clearance groove and a crushing groove, the clearance groove extends axially along the shaft, the crushing groove extends circumferentially along the stator, and the gap between the crushing teeth is disposed within the crushing groove.

[0018] In some embodiments, there are multiple crushing teeth arranged at intervals along the circumference of the rotor, and the number of clearance slots is the same as the number of crushing teeth.

[0019] According to the tar residue pressing pump provided in this application embodiment, during the rotary crushing and extrusion of tar residue, the stator is subjected to a large force along the circumferential tangential direction, especially when there are large slag blocks, the force on the stator is even greater. Because limiters are provided between two adjacent stators, the stator can be circumferentially limited, preventing the circumferential movement of the stator from causing the threaded fasteners to loosen or even shear off. Multiple limiters are provided between two adjacent stators, improving the stability of the stator during operation and further ensuring the stability of the threaded fasteners. This, in turn, makes the stator more stable, less likely to damage other structural components of the pressing pump, and reduces losses. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a tar residue pressing pump in one or more embodiments of this application is shown.

[0021] Figure 2 It shows Figure 1 A cross-sectional view of the tar pressing pump at the center of the discharge port.

[0022] Figure 3 It shows Figure 1 A magnified view of a tar pressing pump.

[0023] Figure 4 An assembly diagram of the stator and limiting components is shown.

[0024] Figure 5 It shows Figure 4 AA section diagram.

[0025] Explanation of reference numerals in the attached figures:

[0026] 11-Stator, 111-Allowing groove, 112-Crushing groove, 12-Limiting component, 13-Threaded connector. 20-Pump casing, 21-Housing shell, 211-Discharge port, 22-Inlet cover, 221-Feed port, 222-Ring protrusion, 223-Connecting end, 23-Mounting ring, 30-Rotor, 40-Pump shaft. Detailed Implementation

[0027] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] According to the first aspect of this application, a tar residue pressing pump is provided for crushing tar residue, and the stator is not easy to loosen, resulting in fewer maintenance needs.

[0029] Please see Figure 1 The tar residue pressing pump provided in this application includes a pump casing 20, a rotor 30, and a stator assembly.

[0030] The pump casing 20 serves as the mounting base for the rotor 30 and the stator assembly. It is equipped with a pressing chamber and an inlet 221 and an outlet 211 connected to the pressing chamber. The tar residue enters the pressing chamber from the inlet 221 and is discharged from the outlet 211 after being crushed.

[0031] In some embodiments, please refer to Figure 1The pump casing 20 includes a housing 21, an inlet cover 22, and a mounting ring 23. The housing 21 has a discharge port 211, and the inlet cover 22 has a feed port 221. The mounting ring 23 is located between the housing 21 and the inlet cover 22, with its inner side extending into the housing 21. The stator 11 is connected to the portion of the mounting ring 23 that extends into the housing 21 by threaded fasteners. The pump casing 20 adopts a split structure of the housing 21, the inlet cover 22, and the mounting ring 23, which facilitates the installation of the stator assembly.

[0032] In some embodiments, please continue reading Figure 3 The connecting end 223 of the inlet cover 22 extends into the housing 21, which facilitates the initial positioning of the inlet cover 22 and provides radial support for the mounting ring 23 and the stator 11. The outer periphery of the inlet cover 22 is provided with an annular protrusion 222. The mounting ring 23 is located between the annular protrusion 222 and the housing 21. The mounting ring 23, the annular protrusion 222 and the housing 21 can be connected by bolts that pass through the three. The threaded fastener, namely the countersunk bolt, is located between the housing 21 and the connecting end 223. The threaded fastener is parallel to the rotation axis of the rotor 30, thereby realizing the connection of the various structures of the press pump.

[0033] The rotor 30 provides the power for crushing and is located within the pressing chamber. It works in conjunction with the stator assembly to crush the tar residue. The rotor 30 is typically powered to rotate via a pump shaft 40, which is keyed to the rotor 30.

[0034] In some embodiments, the rotor 30 is provided with crushing teeth; see [link to relevant documentation]. Figure 1 as well as Figure 2 The stator 11 is provided with a connecting clearance groove 111 and a crushing groove 112. The clearance groove 111 extends axially along the shaft, and the crushing groove 112 extends circumferentially along the stator 11. The crushing grooves 112 of multiple stators 11 form an annular groove coaxial with the rotor 30. The gap between the crushing teeth is set within the crushing groove 112 so that the tar residue is crushed from large pieces to small pieces under the action of the crushing teeth of the rotor 30 and the crushing grooves 112 of the stator 11. The clearance groove 111 is provided so that the stator 11 avoids interference with the crushing teeth of the rotor 30 when it is installed in the housing 21, thus facilitating the installation of the stator 11.

[0035] In some embodiments, a plurality of crushing teeth are provided, and the plurality of crushing teeth are arranged at circumferential intervals along the rotor 30. See [link to relevant documentation]. Figure 2 The number of clearance grooves 111 is the same as the number of crushing teeth, and they are correspondingly arranged. In some embodiments, the stator 11 is provided with a radially penetrating material passage hole, so that large pieces of material are crushed and move outward from the material passage hole toward the outside of the stator 11, and then discharged from the discharge port 211.

[0036] The stator assembly is a stationary component in the tar residue pressing pump, located within the pressing chamber. (See [link to relevant documentation]). Figure 4The stator assembly includes a stator 11 and multiple limiting units. Multiple stators 11 are connected to the pump housing 20 via threaded fasteners, such as countersunk bolts. Generally, the axial direction of the threaded fasteners is parallel to or perpendicular to the rotation axis of the rotor 30. During the crushing of tar residue by the stator assembly and rotor 30, the tar residue has a tangential motion component along the stator 11. Along the circumference of the rotor 30, the stators 11 and limiting units are staggered around the outside of the rotor 30. Multiple stators 11 are spaced around the rotor 30 with a gap around the rotation axis of the rotor 30. This allows the outer stators 11 to cooperate with the central rotor 30, achieving the crushing of the tar residue. During the crushing process, the tangential motion of the tar residue acts on the stator 11, causing the threaded fasteners to experience shearing force along the tangential direction of the stator 11, making them prone to loosening. The limiting unit includes multiple limiting elements 12. Therefore, multiple limiting elements 12 are provided between any two adjacent stators 11. The multiple limiting elements 12 are spaced apart along the rotation axis of the rotor 30. When the threaded fastener is subjected to shear force along its own tangential direction, the limiting elements 12 will restrict the tangential movement tendency of the stator 11, thus making the threaded fastener less prone to loosening. The multiple limiting elements 12 can improve the stability of the stator 11 along the rotation axis of the rotor 30, making the threaded fastener less prone to loosening.

[0037] In some embodiments, the limiting member 12 is connected to one of two adjacent stators 11. The limiting member 12 is frustoconical, with its smaller end closer to the other stator 11. The frustoconical shape of the limiting member 12, with one end larger than the other, facilitates welding and prevents the smaller end from wearing off during the press's operation. In other embodiments, the limiting member 12 can also be cylindrical, achieving circumferential limiting of the stator 11.

[0038] In some embodiments, the gap between the small end of the frustum-shaped limiting member 12 and the other of the two stators 11 is 0.05 to 0.1 mm to facilitate the installation of the stator 11. In other embodiments, the gap between the small end and the other of the two stators 11 is greater than 0.1 mm, which can also achieve circumferential limiting of the stator 11, but may increase the number of maintenance operations to some extent.

[0039] In some embodiments, since the limiting member 12 is very small, it can be welded to the stator 11, and then fine-tuned with a file. For example, welding rods of grade 506 or similar material can be used to weld and fit the two sides of the stator 11. For specific implementation details, please refer to [link to relevant documentation]. Figure 4For example, if there are four stators 11, two diagonally opposite stators 11 can be welded together. In these two stators 11, both sides of each stator 11 are welded together. In other embodiments, the limiting member 12 and the stator 11 can also be connected by bolts, but this is more difficult.

[0040] In some embodiments, the dimension of the limiting member 12 along the rotation axis of the rotor 30 is 10mm to 20mm, which facilitates the connection of the limiting member 12 to the stator 11 and ensures the circumferential limiting effect on the stator 11. In other embodiments, the dimension of the limiting member 12 along the rotation axis can be greater than 20mm, which can also achieve circumferential limiting of the stator 11. In still other embodiments, the dimension of the limiting member 12 along the rotation axis can be less than 10mm, which can also achieve axial limiting of the stator 11. In this case, more limiting members 12 can be provided to improve the stability of circumferential limiting.

[0041] In some embodiments, please refer to Figure 5 Two limiting members 12 are provided between two adjacent stators 11. The number of these members is relatively small, the processing time is short, the workload is small, and the stability of the circumferential limiting of the stator 11 can be guaranteed. In some other embodiments, three, four, or five limiting members 12 can also be provided between two adjacent stators 11, which can also guarantee the stability of the circumferential limiting of the stator 11.

[0042] The following describes the assembly process of the stator 11 of the press pump in this application, taking an example where there are four stators 11:

[0043] First, install the four stator 11 sections in the normal assembly sequence. Next, install the intermediate ring and eight countersunk bolts. Then, use a feeler gauge to measure the circumferential clearance between the four stator 11 sections and record the clearance values. Afterward, remove the four stator 11 sections (numbered 1-4 clockwise). For stator 11 sections #1 and #3, weld 506 welding rods at equal intervals on both sides of each section, selecting two points on each side. The height of the welded and refined weld at each point should be the same as the clearance between the corresponding stator 11 sections (allowable lower deviation of 0.05mm). Optimize and modify both sides of each fan-shaped groove component using the same method. Finally, assemble the components and re-measure the circumferential clearance of each fan-shaped groove component, ensuring it is no greater than 0.10mm. After meeting the requirements, assemble the pump body as a whole and perform a test run.

[0044] The stator 11 of the four tar pressing pumps on site was optimized. After optimization, the equipment operated stably, and the number of failures such as loose or broken countersunk bolts or wear of components in stator 11 decreased by 60%. The equipment maintenance cycle was extended from 1 month to 3 months. Based on practical experience, it is estimated that the modification can reduce the consumption of one set of inlet pump cover, sealing end cover, and stator 11 per year, reducing spare parts costs by at least 500,000 yuan.

[0045] The tar residue press provided in this application optimizes the self-fitting of the fan-shaped stator 11, eliminating the gap between the fan-shaped stators 11 in the circumferential direction during assembly, so as to withstand the force on each fan-shaped stator 11 in the circumferential tangential direction when crushing tar residue under normal pressure, thereby reducing component wear, equipment failure and increased maintenance costs caused by loose countersunk bolts.

[0046] The key technical point of this invention is that by assembling the original grooved sector components, measuring the gap between the grooved sector components, and then using welding rods of grade 506 or similar material to perform overlay welding on the two sides of the two diagonal sector components to compensate for the original gap between the two adjacent stators 11, reduce the shear stress of the countersunk bolts used to fix the sector groove components in the tar residue pressing, reduce the number of fractures or loosenings, and reduce the frequency of failures.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A tar residue pressing pump, characterized in that, include: The pump casing is provided with a pressing chamber and an inlet and an outlet communicating with the pressing chamber; The rotor is located inside the pressing chamber; A stator assembly is located within the pressing chamber. The stator assembly includes a stator and multiple limiting units. Multiple stators are connected to the pump housing by threaded fasteners. Along the circumference of the rotor, the stators and limiting units are staggered outside the rotor. Each limiting unit includes multiple limiting members, which are spaced apart along the rotation axis of the rotor to restrict the tangential movement tendency of the stator.

2. The tar residue pressing pump according to claim 1, characterized in that, The limiting member is connected to one of the two adjacent stators. The limiting member is frustoconical, and the smaller end of the frustoconical limiting member is close to the other of the two stators.

3. The tar residue pressing pump according to claim 2, characterized in that, The gap between the small end of the frustum-shaped limiting member and the other of the two stators is 0.05~0.1mm.

4. The tar residue pressing pump according to any one of claims 1-3, characterized in that, The limiting component is welded to the stator.

5. The tar residue pressing pump according to any one of claims 1-3, characterized in that, The dimension of the limiting member along the rotation axis of the rotor is 10mm~20mm.

6. The tar residue pressing pump according to any one of claims 1-3, characterized in that, Two limiting members are provided between two adjacent stators.

7. The tar residue pressing pump according to any one of claims 1-3, characterized in that, The pump housing includes a housing, an inlet cover, and a mounting ring. The inlet cover has the feed port. The mounting ring is located between the housing and the inlet cover. The inner side of the mounting ring extends into the housing. The stator is connected to the portion of the mounting ring that extends into the housing by threaded fasteners.

8. The tar residue pressing pump according to claim 7, characterized in that, The connecting end of the inlet cover extends into the housing. The outer periphery of the inlet cover is provided with an annular protrusion. The mounting ring is located between the annular protrusion and the housing. The threaded fastener is located between the housing and the connecting end.

9. The tar residue pressing pump according to any one of claims 1-3, characterized in that, The rotor is provided with crushing teeth, and the stator is provided with a connecting clearance groove and a crushing groove. The clearance groove extends along the axial direction of the rotor, and the crushing groove extends circumferentially. The gap between the crushing teeth is disposed in the crushing groove.

10. The tar residue pressing pump according to claim 9, characterized in that, The crushing teeth are provided in multiples, and the multiple crushing teeth are arranged at intervals along the circumference of the rotor. The number of clearance grooves is the same as the number of crushing teeth.

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