A new high temperature asphalt pump

Abstract

The utility model discloses a novel high temperature pitch pump belongs to pitch pump field. Including pump shaft, this pump shaft is assembled with bearing assembly, and bearing assembly includes the bearing box of sleeveing on pump shaft, and bearing box is horizontal structure, and the first bearing and second bearing of bearing box in is close to two end positions and is provided with respectively, and bearing box has cooling chamber, and bearing box has the connecting end, and the pump integrated assembly is assembled on the connecting end, and the pump integrated assembly includes the pump end cover of setting on the connecting end, and the pump body is connected with on pump end cover, and the end surface of pump body is provided with the connecting assembly of butt joint installation with pump end cover. A novel high temperature pitch pump of the application, through with horizontal bearing box bearing assembly and pump integrated assembly split support, conveying function, cooperate butt joint type connecting assembly realizes component link, and cooling chamber adapts high temperature working condition, both avoid traditional integrated structure to disassemble difficult problem, reduce the maintenance cost, and guarantee pump shaft stability and pitch efficient conveying, and give consideration to practical and maintenance convenient.

Description

Technical Field

[0001] This utility model relates to the field of asphalt pump technology, and in particular to a novel high-temperature asphalt pump. Background Technology

[0002] An asphalt pump is a positive displacement mechanical device used for pumping, transporting, and pressurizing liquid asphalt. There are various structural types, the most common being gear pumps and screw pumps. Gear pumps use the meshing of a pair of rotating gears to divide the pump's working chamber into an intake chamber and a discharge chamber. As the gears rotate, asphalt is drawn in under atmospheric pressure and then extruded through the discharge chamber. Screw pumps, on the other hand, rely on the changing volume and movement of the meshing space formed by the pump body and the screw to transport asphalt. Based on the number of screws, they can be classified as single-screw pumps, twin-screw pumps, and triple-screw pumps, etc.

[0003] Traditional pump bodies often employ a novel integrated casting and segmented fixing design for high-temperature asphalt pumps. This design primarily relies on the high integration of flow components and support structures, with non-removable connections at joints. The pump body is typically a single- or two-section casting structure, with the suction chamber, discharge chamber, and pump base / end cover integrally cast. Only an opening for impeller installation is provided, and this opening is often secured with flange bolts, requiring the removal of numerous bolts to expose internal components. Sealing components are often embedded in the gap between the pump body and the pump shaft, forming a nested structure with the end cover and bearing housing. Disassembly requires separating the end cover from the pump body first, then gradually peeling off the seals, increasing disassembly difficulty and necessitating specialized tools and significant time consumption. Therefore, a novel high-temperature asphalt pump design is needed.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] This utility model provides a novel high-temperature asphalt pump to solve the problems of traditional high-temperature asphalt pumps, which are integrated castings with segmented fixed designs, have high component integration, are difficult to disassemble, emphasize stability, require special tools for disassembly, are time-consuming, and have easily damaged parts.

[0006] The present invention adopts the following technical solution: a novel high-temperature asphalt pump, mainly comprising a pump shaft, on which a supporting assembly is mounted. The supporting assembly includes a bearing housing sleeved on the pump shaft. The bearing housing has a horizontal structure. A first bearing and a second bearing supporting the pump shaft are respectively arranged near both ends of the bearing housing. The bearing housing has a cooling chamber for introducing a cooling medium. The bearing housing has a connecting end. A pump integrated assembly for providing a flow channel for asphalt transportation is mounted on the connecting end. The pump integrated assembly includes a pump end cover disposed on the connecting end. A pump body is connected to the pump end cover. A connecting assembly that is mated and installed with the pump end cover is provided on the end face of the pump body.

[0007] Furthermore, a pump impeller is mounted on the pump shaft via an impeller lock nut, the pump impeller is located inside the pump body, and a spiral cavity matching the pump impeller is formed inside the pump body.

[0008] Furthermore, the connecting assembly includes a pump cover pressure ring fixed by bolts, the pump cover pressure ring being sleeved on the pump end cover to provide axial positioning for the pump end cover.

[0009] Furthermore, a chamber is formed between the pump end cover and the connecting end, and a mechanical seal is installed on the pump shaft within the chamber.

[0010] Furthermore, a bearing lock nut is mounted on the pump shaft. The bearing lock nut is in close contact with the inner ring side of the first bearing to axially position the first bearing and apply a preload.

[0011] Furthermore, a rear bearing cover is fixed to one end of the bearing housing by a bolt, and a through hole for the pump shaft to pass through is provided on the rear bearing cover, and a rear bearing isolator is provided in the through hole.

[0012] Furthermore, the other end of the bearing housing is fixed with a front bearing cover by bolt two. The front bearing cover has a through hole two for the pump shaft to pass through, and a front bearing isolator is installed in the through hole two.

[0013] Furthermore, the bearing housing has multiple sets of symmetrically arranged mounting holes, which are used to install the bearing housing at any suitable position by means of bolts.

[0014] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0015] A novel high-temperature asphalt pump features a modular design that separates the support and delivery functions through a horizontal bearing housing as the load-bearing component and a pump integration component that provides the delivery channel. This design, coupled with a docking connection between the pump body end face and the pump end cover, allows for component connection without disassembling the overall structure. Furthermore, the bearing housing's cooling chamber can flexibly accommodate cooling media to withstand temperatures up to 450 degrees Celsius. This design avoids the disassembly difficulties associated with highly integrated traditional structures, reducing maintenance difficulty and time costs. The independent load-bearing component ensures the coaxiality and stability of the pump shaft during high-speed operation, while the pump integration component ensures efficient asphalt delivery, truly balancing equipment practicality and ease of daily maintenance. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 This is a cross-sectional view of the high-temperature asphalt pump described in this application;

[0019] Figure 2 for Figure 1 The left view;

[0020] Figure label:

[0021] 1. Pump shaft; 2. Rear bearing cover; 21. Bolt 1; 3. First bearing; 4. Bearing housing; 41. Mounting hole; 42. Cooling chamber; 43. Connecting end; 5. Second bearing; 6. Front bearing cover; 61. Bolt 2; 7. Mechanical seal; 8. Pump end cover; 9. Pump cover pressure ring; 91. Bolt 3; 10. Pump impeller; 11. Impeller lock nut; 12. Pump body; 13. Rear bearing isolator; 14. Bearing lock nut; 15. Front bearing isolator. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0023] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0024] Reference Figures 1-2As shown in the figure, a novel high-temperature asphalt pump provided by this utility model includes a pump shaft 1 and a load-bearing component mounted on the pump shaft 1. The load-bearing component includes a bearing housing 4 sleeved on the pump shaft 1. The bearing housing 4 has a horizontal structure. The horizontal structure can evenly distribute the load of the pump shaft 1 to the two mounting surfaces, avoiding bending or vibration of the pump shaft 1 caused by unilateral force, and improving the overall stability of the pump during operation. It is especially suitable for the additional load brought by the high viscosity medium when conveying high-temperature asphalt. The bearing housing 4 is the core structure supporting the pump shaft 1, providing installation space and protection for the pump shaft 1 and the internal bearings. The pump shaft 1 is set horizontally through the center of the bearing housing 4. A first bearing 3 and a second bearing 5 are respectively set near the two ends in the bearing housing 4. The first bearing 3 and the second bearing 5 work together to provide radial and axial support for the pump shaft 1, restrict the movement of the pump shaft 1, and ensure that the pump shaft 1 maintains precise coaxiality during operation, thereby ensuring the conveying accuracy and stability of the entire pump.

[0025] A bearing lock nut 14 is mounted on the pump shaft 1. This bearing lock nut 14 is tightly fitted against the inner ring side of the first bearing 3. The threaded engagement between the bearing lock nut 14 and the pump shaft 1 achieves a secure fastening, thereby axially positioning the first bearing 3 and applying a preload. Specifically, when the bearing lock nut 14 is tightened on the pump shaft 1, its end face is tightly fitted with the end face of the inner ring of the first bearing 3. The axial force generated by the threaded engagement acts directly on the inner ring of the first bearing 3, firmly fixing the inner ring in the preset position on the pump shaft 1. This effectively prevents relative sliding between the inner ring and the pump shaft 1 when the pump shaft 1 is operating at high speed or under axial load. Simultaneously, by adjusting the tightening degree of the bearing lock nut 14, the clearance of the first bearing 3 can be precisely controlled. This avoids abnormal operating noise due to excessive clearance and overheating and wear due to insufficient clearance, thus providing a continuous and stable axial preload for the first bearing 3 and ensuring its long-term stable operation.

[0026] Furthermore, a rear bearing cover 2 is fixed to one end of the bearing housing 4 by bolt 21. Bolt 21 serves to tighten the rear bearing cover 2, ensuring its stable installation on the bearing housing 4. The rear bearing cover 2 has a through hole (not shown in the figure) for the pump shaft 1 to pass through, and a rear bearing isolator 13 is installed within this through hole. The rear bearing isolator 13 effectively isolates external impurities from the internal bearing and grease, preventing impurities from entering and disrupting the bearing lubrication environment. It also reduces internal grease leakage, ensuring normal bearing lubrication. Meanwhile, in the bearing housing… The other end of 4 is fixed with a front bearing cover 6 by bolt 2 61. Bolt 2 61 has a similar function to bolt 1 21, which is used to fasten the front bearing cover 6. The front bearing cover 6 also has a through hole 2 (not shown in the figure) for the pump shaft 1 to pass through, and a front bearing isolator 15 is provided in the through hole 2. The front bearing isolator 15 and the rear bearing isolator 13 have the same function, which is to isolate and protect the internal bearings and other components from the front end of the bearing housing 4, further improve the effect of impurity isolation and grease leakage prevention, and comprehensively ensure the cleanliness and lubrication reliability of the bearing housing 4.

[0027] Furthermore, multiple sets of symmetrically arranged mounting holes 41 are provided on the bearing housing 4. These mounting holes 41 provide connection points for the installation of the bearing housing 4. By bolting into the mounting holes 41, the bearing housing 4 can be securely installed in any suitable position to meet the needs of different equipment layouts and installations. In addition, the bearing housing 4 has a cooling chamber 42. In actual use, depending on the actual temperature conditions of asphalt transportation, which can reach up to 450 degrees Celsius, cooling can be achieved by introducing a cooling medium (such as cooling water) into the cooling chamber 42, or by using insulation material to wrap the cooling chamber 42 and the entire bearing housing 4 to achieve insulation. This allows for flexible adaptation to different temperature environments, ensuring that the bearing operates within a suitable temperature range and extending the bearing's service life.

[0028] Meanwhile, the bearing housing 4 has a connecting end 43 near the front bearing cover 6. The connecting end 43 is a transition connection structure, and a pump integration assembly is assembled on the connecting end 43. The pump integration assembly includes a pump end cover 8 disposed on the connecting end 43, a pump body 12 connected to the pump end cover 8, and a pump impeller 10 assembled on the pump shaft 1 through an impeller lock nut 11.

[0029] A chamber is formed between the pump end cover 8 and the connecting end 43. A mechanical seal 7 is installed on the pump shaft 1 inside the chamber. The mechanical seal 7 is a prior art technology and mainly consists of a dynamic ring, a stationary ring, an elastic element, an auxiliary sealing ring, and a transmission mechanism. The chamber provides installation space for the mechanical seal 7 and isolates the high-temperature asphalt from the internal components of the bearing housing 4, preventing the high-temperature medium from affecting the bearing's working environment. The pump body 12 is the core flow channel for asphalt transportation. It forms a spiral cavity inside that matches the pump impeller 10. The pump impeller 10 rotates synchronously at high speed with the pump shaft 1, which can guide the asphalt from the inlet to the outlet and achieve pressurization.

[0030] It should be noted that the mechanical seal 7 forms a dynamic seal in the chamber by means of synchronous rotation of the dynamic ring and the pump shaft 1 and fixation of the stationary ring and the pump end cover 8, which prevents the high temperature asphalt in the pump body 12 from leaking to the bearing box 4 side and ensures the reliability of the seal.

[0031] A connecting component is provided on the end face of the pump body 12 to be installed with the pump end cover 8. The connecting component includes a pump cover pressure ring 9 fixed by bolts 3 91. Bolts 3 91 provide a stable tightening force to ensure that the pump cover pressure ring 9 fits tightly with the pump body 12. The pump cover pressure ring 9 is sleeved on the pump end cover 8, which not only provides axial limit for the pump end cover 8, but also enhances the sealing of the connection between the pump end cover 8 and the pump body 12.

[0032] It should be noted that the pump shaft 1, pump impeller 10 and mechanical seal 7 are defined as the rotor assembly. This new high-temperature asphalt pump achieves a pull-out structure through modular design: the pump body 12 is fixed to the inlet and outlet pipelines, the pump end cover 8 and the bearing housing 4 are connected at the bearing housing 43 in a quick-disassembly connection, and the pump cover pressure ring 9 is fixed to the pump body 12 and the pump end cover 8 by bolts 91. The rotor assembly is positioned only by the bearing and the bearing housing 4, and the impeller lock nut 11 and the pump shaft 1. During maintenance, there is no need to disassemble the pump body 12 and the inlet and outlet pipelines. After loosening the above connections, the rotor assembly can be pulled out from the bearing housing 4 side to directly expose the parts to be maintained.

[0033] Working principle: When the new high-temperature asphalt pump is started, the external power source (such as a motor) drives the pump shaft 1 to rotate. At this time, the bearing housing 4 serves as a shaft support structure. The first bearing 3 and the second bearing 5 inside provide bidirectional support for the pump shaft 1. The first bearing 3 and the second bearing 5 respectively limit the radial runout and axial movement of the pump shaft 1. With the pre-tightening effect of the bearing lock nut 14, the pump shaft 1 is ensured to maintain stable coaxiality during high-speed rotation, avoiding shaft bending or vibration caused by the load generated by the transportation of high-viscosity asphalt.

[0034] Meanwhile, the built-in rear bearing isolator 13 and the front bearing isolator 15 form a double protection, which not only prevents external dust and impurities from entering the bearing housing 4 and contaminating the grease, but also prevents grease leakage, ensuring that the first bearing 3 and the second bearing 5 operate in a clean and adequately lubricated environment; if the asphalt conveying temperature is too high or too low, the cooling chamber 42 in the bearing housing 4 can adjust the temperature by introducing a cooling medium or wrapping it with insulation material, so as to avoid thermal stress damage to the bearing due to abnormal temperature, and provide continuous protection for the stable rotation of the pump shaft 1;

[0035] When the pump shaft 1 rotates, the pump impeller 10 rotates synchronously at high speed. The pump impeller 10 is located in the spiral flow channel inside the pump body 12. The centrifugal force generated by the rotation of its blades draws in the high-temperature asphalt at the inlet of the pump body 12. Subsequently, the asphalt is continuously pressurized in the flow channel and finally discharged from the outlet of the pump body 12, completing the transportation process. During this process, the chamber formed by the connection end 8 of the pump end cover 8 and the bearing housing 43 plays a key isolation role.

[0036] The mechanical seal 7 inside the chamber forms a dynamic sealing structure with a rotating rotating ring that rotates synchronously with the pump shaft 1 and a stationary ring that is fixed to the pump end cover 8. This tight fit forms the main sealing surface, effectively preventing the high-temperature asphalt inside the pump body 12 from leaking to the bearing housing 4 and avoiding corrosion of the bearing components by the high-temperature medium. At the same time, the pump cover pressure ring 9 not only provides axial positioning for the pump end cover 8 but also strengthens the connection and sealing between the pump end cover 8 and the pump body 12, preventing asphalt leakage from the gap between the pump end cover 8 and the pump body 12. This dual-seal design ensures the reliability and safety of the high-temperature asphalt transportation process.

[0037] When maintenance is required on rotor components such as pump shaft 1, pump impeller 10, and mechanical seal 7, there is no need to repeat the disassembly steps. The maintenance logic of the pull-out structure can be followed directly, which simplifies the maintenance process and avoids the cumbersome operation of disassembling pipelines and moving pump body 12 required by the traditional pump body 12 structure. This not only shortens the maintenance time but also reduces the risk of seal failure caused by pipeline disassembly and assembly. In daily operation, the multiple sets of symmetrical mounting holes 41 on the bearing housing 4 can flexibly adapt to different equipment layouts, and the temperature control function of the cooling chamber 42 can adjust the temperature according to seasonal temperature differences and asphalt grade, so that the pump body 12 is always adapted to the actual working conditions, taking into account both the needs of long-term stable operation and convenient maintenance.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A novel high-temperature asphalt pump, characterized in that: include A pump shaft (1) is equipped with a support assembly for supporting itself. The support assembly includes a bearing housing (4) sleeved on the pump shaft (1). The bearing housing (4) has a horizontal structure. A first bearing (3) and a second bearing (5) supporting the pump shaft (1) are respectively provided near both ends of the bearing housing (4). The bearing housing (4) has a cooling chamber (42) for introducing cooling medium. The bearing housing (4) has a connecting end (43). A pump integration assembly for providing a flow channel for asphalt transportation is assembled on the connecting end (43). The pump integration assembly includes a pump end cover (8) provided on the connecting end (43). A pump body (12) is connected to the pump end cover (8). A connecting assembly that is mated and installed with the pump end cover (8) is provided on the end face of the pump body (12). A pump impeller (10) is mounted on the pump shaft (1) via an impeller lock nut (11). The connecting assembly includes a pump cover pressure ring (9) fixed by bolt three (91), the pump cover pressure ring (9) being sleeved on the pump end cover (8) to provide axial limiting for the pump end cover (8); A chamber is formed between the pump end cover (8) and the connecting end (43), and a mechanical seal (7) is installed on the pump shaft (1) within the chamber. The pump cover pressure ring (9) is used to detachably fix the pump body (12) to the pump end cover (8) by means of the three bolts (91); The pump shaft (1), the pump impeller (10) and the mechanical seal (7) are combined to form a rotor assembly, configured such that when the bolts (91) are loosened and the detachable fixing is released, the rotor assembly can be pulled out from the bearing housing (4) side, and the pump body (12) remains fixed.

2. The novel high-temperature asphalt pump according to claim 1, characterized in that: The pump impeller (10) is located inside the pump body (12), and a spiral cavity matching the pump impeller (10) is formed inside the pump body (12).

3. The novel high-temperature asphalt pump according to claim 1, characterized in that: The pump shaft (1) is equipped with a bearing lock nut (14), which is close to the inner ring side of the first bearing (3) to axially position the first bearing (3) and apply preload.

4. A novel high-temperature asphalt pump according to claim 3, characterized in that: One end of the bearing housing (4) is fixed with a rear bearing cover (2) by a bolt (21). The rear bearing cover (2) has a through hole for the pump shaft (1) to pass through, and a rear bearing isolator (13) is installed in the through hole.

5. A novel high-temperature asphalt pump according to claim 4, characterized in that: The other end of the bearing housing (4) is fixed with a front bearing cover (6) by bolt two (61). The front bearing cover (6) has a through hole two for the pump shaft (1) to pass through, and a front bearing isolator (15) is installed in the through hole two.

6. A novel high-temperature asphalt pump according to claim 1, characterized in that: The bearing housing (4) has multiple sets of symmetrically arranged mounting holes (41), and the bearing housing (4) can be installed in any suitable position by bolting through the mounting holes (41).

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