Asphalt conveying double-screw pump

Abstract

The utility model discloses an asphalt conveying double-screw pump which comprises an inlet front end cover, a pump body, a connecting plate, a bearing seat and a rear cover which are sequentially connected, and the side face of the pump body is communicated with an outlet pipe. A driving shaft and a driven shaft are arranged in the pump body, a spiral sleeve is arranged in the pump body, one end of the driving shaft and one end of the driven shaft are located in the spiral sleeve, and the other end of the driving shaft and the other end of the driven shaft penetrate through the connecting plate and the bearing seat and extend into the rear cover. Mechanical seals are arranged on the driving shaft and the driven shaft; a first bearing and a second bearing are respectively arranged at two ends of the bearing seat; a first gear is arranged at the end part of the driving shaft, and a second gear meshed with the first gear is arranged at the end part of the driven shaft; the end part of the driving shaft extends out of the rear cover; the double-screw pump solves the problems that due to the fact that the sealing performance between a shaft rod in an existing double-screw pump and each part of a pump body is insufficient, leakage is prone to being caused when fluid materials are conveyed, transmission fit between double shafts is unstable, and vibration and abnormal sound are prone to being generated.

Description

Technical Field

[0001] This utility model relates to screw pumps, specifically to a twin-screw pump for asphalt transportation. Background Technology

[0002] A twin-screw pump is a positive displacement fluid conveying device designed based on the principle of external meshing. It utilizes two screws with opposite directions that rotate synchronously within the pump body, forming a continuous sealed chamber. The helical motion of the screws propels the medium from the suction end to the discharge end, resulting in a pulsation-free process and stable flow rate. However, existing twin-screw pumps suffer from insufficient sealing performance between the shafts and other parts of the pump body, leading to potential leaks when conveying fluids. Furthermore, the unstable transmission between the two shafts can easily cause vibration and abnormal noise. Utility Model Content

[0003] The purpose of this invention is to provide an asphalt conveying twin-screw pump that solves the problems of insufficient sealing performance between the shaft and various parts of the pump body in existing twin-screw pumps, which easily leads to leakage when conveying fluid materials, and unstable transmission between the two shafts, which easily causes vibration and abnormal noise.

[0004] To achieve the above objectives, this utility model provides an asphalt conveying twin-screw pump, which includes an inlet front cover, a pump body, a connecting plate, a bearing seat, and a rear cover connected in sequence, and an outlet pipe is connected to the side of the pump body;

[0005] The pump body is provided with a drive shaft and a driven shaft respectively. The pump body is provided with a spiral sleeve. One end of the drive shaft and the driven shaft are located in the spiral sleeve, and the other end passes through the connecting plate and the bearing seat and extends into the rear cover.

[0006] Both the drive shaft and the driven shaft are equipped with mechanical seals, which are disposed on the connecting plate.

[0007] The bearing housing is provided with a first bearing and a second bearing at its two ends, and the drive shaft and the driven shaft pass through the second bearing and the first bearing, respectively.

[0008] The drive shaft has a first gear at one end and a second gear at one end that meshes with the first gear. Both the first gear and the second gear are located inside the rear cover, and the end of the drive shaft extends out of the rear cover.

[0009] Preferably, a mounting hole is formed on the rear cover, a first oil seal is disposed in the mounting hole, and the drive shaft passes through the first oil seal and extends out of the rear cover.

[0010] Preferably, the first bearing is locked to one end of the bearing housing by a first bearing cap;

[0011] The second bearing is locked to the other end of the bearing housing by a second bearing cover; a second oil seal is provided on the second bearing cover, and the drive shaft and the driven shaft pass through the second oil seal.

[0012] Preferably, bushings are fitted onto the drive shaft and the driven shaft located within the bearing housing.

[0013] Preferably, both ends of the mechanical seal are locked to the connecting plate by a mechanical seal cap and a positioning ring, respectively.

[0014] Preferably, the rear cover is provided with an oil cup and a screw plug.

[0015] Preferably, a level gauge is provided on the rear cover.

[0016] Preferably, a hollow structure is formed between the connecting plate and the bearing seat.

[0017] Beneficial Effects: This utility model provides a twin-screw pump for asphalt transportation. The twin-screw pump includes an inlet front cover, a pump body, a connecting plate, a bearing seat, and a rear cover connected in sequence. An outlet pipe is connected to the side of the pump body. A drive shaft and a driven shaft are respectively disposed within the pump body, and a spiral sleeve is disposed within the pump body. One end of both the drive shaft and the driven shaft is located within the spiral sleeve, and the other end passes through the connecting plate and the bearing seat and extends into the rear cover. Mechanical seals are disposed on both the drive shaft and the driven shaft, and the mechanical seals are disposed on the connecting plate. A first bearing and a second bearing are respectively disposed at both ends of the bearing seat, and the drive shaft and the driven shaft pass through the second bearing and the first bearing, respectively. A first gear is disposed at the end of the drive shaft, and a second gear meshing with the first gear is disposed at the end of the driven shaft. Both the first gear and the second gear are disposed within the rear cover. The end of the drive shaft extends out of the rear cover. The liquid material to be transported enters the pump body through the inlet front cover. The drive screw and driven screw inside the pump body rotate in opposite directions within the spiral sleeve of the pump body. The spiral teeth of the screw and the inner wall of the spiral sleeve form multiple continuous sealed chambers. When the screws mesh, the volume of the suction end chamber increases, generating negative pressure and drawing the medium into the pump body. The volume of the discharge end chamber decreases, pushing the medium towards the outlet pipe. Here, the drive shaft extends out of the rear cover and connects to the motor. The rotation of the drive shaft drives the second gear and the driven shaft to rotate through the first gear. The first gear and the second gear are set inside the rear cover. Lubricating oil can be added to ensure smooth transmission and avoid excessive wear. The bearings set at both ends of the bearing seat can effectively support the drive shaft and the driven shaft, ensuring smooth rotation and more stable transmission between the two shafts. At the same time, a mechanical seal is set on the connecting plate of the pump body to ensure the sealing performance of the pump body and prevent leakage of liquid material during transport.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a front view of the twin-screw pump for asphalt conveying provided by this utility model;

[0021] Figure 2 This is a cross-sectional view of the twin-screw pump for asphalt conveying provided by this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Inlet front cover; 2-Outlet pipe; 3-Spiral sleeve; 4-Pump body; 6-Driven shaft; 7-Drive shaft; 8-Connecting plate; 9-Mechanical seal cover; 20-Positioning ring; 10-Second bearing cover; 11-Bearing seat; 12-First bearing cover; 13-Rear cover; 14-First bearing; 15-First gear; 18-Second gear; 19-Shaft sleeve; 21-Level gauge; 24-First oil seal; 30-Second bearing; 31-Second oil seal; 34-Mechanical seal; 48-Screw plug; 49-Oil cup. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0025] like Figure 1 and 2As shown: This utility model provides a twin-screw pump for asphalt transportation. The twin-screw pump includes an inlet front cover 1, a pump body 4, a connecting plate 8, a bearing seat 11, and a rear cover 13 connected in sequence. An outlet pipe 2 is connected to the side of the pump body 4. A drive shaft 7 and a driven shaft 6 are respectively arranged inside the pump body 4. A spiral sleeve 3 is arranged inside the pump body 4. One end of the drive shaft 7 and the driven shaft 6 are located inside the spiral sleeve 3, and the other end passes through the connecting plate 8 and the bearing seat 11 and extends into the rear cover 13. Both the drive shaft 7 and the driven shaft 6 are equipped with... A mechanical seal 34 is provided, which is disposed on the connecting plate 8; a first bearing 14 and a second bearing 30 are respectively disposed at both ends of the bearing housing 11, and the drive shaft 7 and the driven shaft 6 pass through the second bearing 30 and the first bearing 14 respectively; a first gear 15 is disposed at the end of the drive shaft 7, and a second gear 18 that meshes with the first gear 15 is disposed at the end of the driven shaft 6; the first gear 15 and the second gear 18 are both disposed behind the rear cover 13, and the end of the drive shaft 7 extends out of the rear cover 13. The liquid material to be transported enters the pump body through the inlet front cover. The driving screw and driven screw inside the pump body rotate in opposite directions within the spiral sleeve of the pump body. The spiral teeth of the screw and the inner wall of the spiral sleeve form multiple continuous sealed chambers. When the screws mesh, the volume of the suction end chamber increases, generating negative pressure and drawing the medium into the pump body; the volume of the discharge end chamber decreases, pushing the medium towards the outlet pipe. Here, the driving shaft extends out of the rear cover and connects to the motor. The rotation of the driving shaft drives the second gear and the driven shaft to rotate through the first gear. The first and second gears are located inside the rear cover. Lubricating oil can be added to ensure smooth transmission and avoid excessive wear. The bearings at both ends of the bearing housing can effectively support the driving shaft and driven shaft, ensuring smooth rotation and more stable transmission between the two shafts. At the same time, a mechanical seal is provided on the connecting plate of the pump body to ensure the sealing performance of the pump body and prevent leakage of liquid material during transportation.

[0026] In a preferred embodiment of the present invention, in order to ensure the sealing performance between the rear cover and the drive shaft, a mounting hole is formed on the rear cover 13, and a first oil seal 24 is provided in the mounting hole. The drive shaft 7 passes through the first oil seal 24 and extends out of the rear cover 13.

[0027] In a preferred embodiment of this utility model, in order to effectively fix the bearings at both ends of the bearing housing and improve the sealing performance of the bearing housing to prevent the internal lubricating oil from leaking out, the first bearing 14 is locked to one end of the bearing housing 11 by the first bearing cap 12.

[0028] The second bearing 30 is locked to the other end of the bearing housing 11 by the second bearing cover 10; the second bearing cover 10 is provided with a second oil seal 31, and the drive shaft 7 and the driven shaft 6 pass through the second oil seal 31.

[0029] In a preferred embodiment of this utility model, in order to avoid wear and contamination of the shaft in the bearing housing, bushings 19 are respectively fitted onto the drive shaft 7 and the driven shaft 6 located in the bearing housing 11.

[0030] In a preferred embodiment of this utility model, in order to effectively lock the mechanical seal onto the connecting plate 8, both ends of the mechanical seal 34 are respectively locked onto the connecting plate 8 by the mechanical seal cover 9 and the positioning ring 20.

[0031] In a preferred embodiment of this utility model, in order to facilitate the filling of lubricating oil into the rear cover and to facilitate the discharge of lubricating oil, an oil cup 49 and a screw plug 48 are respectively provided on the rear cover 13.

[0032] In a preferred embodiment of this utility model, a level gauge 21 is provided on the rear cover 13 to facilitate observation of the lubricating oil level inside the rear cover.

[0033] In a preferred embodiment of this utility model, in order to increase the heat dissipation capacity of the drive shaft and the driven shaft, a hollow structure is formed between the connecting plate 8 and the bearing seat 11, so that the drive shaft and the driven shaft are at least partially in contact with the outside air, which facilitates heat dissipation.

[0034] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0035] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0036] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An asphalt delivery twin screw pump characterized by, The asphalt conveying twin screw pump includes an inlet front cover (1), a pump body (4), a connecting plate (8), a bearing seat (11), and a rear cover (13) connected in sequence. The side of the pump body (4) is connected to an outlet pipe (2). The pump body (4) is provided with a drive shaft (7) and a driven shaft (6) respectively. The pump body (4) is provided with a spiral sleeve (3). One end of the drive shaft (7) and the driven shaft (6) are located in the spiral sleeve (3), and the other end passes through the connecting plate (8) and the bearing seat (11) and extends into the rear cover (13). Both the drive shaft (7) and the driven shaft (6) are provided with mechanical seals (34), and the mechanical seals (34) are provided on the connecting plate (8); The bearing housing (11) is provided with a first bearing (14) and a second bearing (30) at both ends, and the driving shaft (7) and the driven shaft (6) pass through the second bearing (30) and the first bearing (14) respectively. The end of the drive shaft (7) is provided with a first gear (15), and the end of the driven shaft (6) is provided with a second gear (18) that meshes with the first gear (15); the first gear (15) and the second gear (18) are both located behind the rear cover (13), and the end of the drive shaft (7) extends out of the rear cover (13).

2. The asphalt transfer twin screw pump of claim 1, wherein, The rear cover (13) has a mounting hole, and a first oil seal (24) is provided in the mounting hole. The drive shaft (7) passes through the first oil seal (24) and extends out of the rear cover (13).

3. The asphalt transfer twin screw pump of claim 2, wherein, The first bearing (14) is locked to one end of the bearing housing (11) by a first bearing cap (12); The second bearing (30) is locked to the other end of the bearing housing (11) by the second bearing cover (10); the second bearing cover (10) is provided with a second oil seal (31), and the drive shaft (7) and the driven shaft (6) pass through the second oil seal (31).

4. The asphalt delivery twin screw pump of claim 3, wherein, A bushing (19) is fitted onto the drive shaft (7) and the driven shaft (6) located in the bearing housing (11).

5. The asphalt transfer twin screw pump of claim 4, wherein, The two ends of the mechanical seal (34) are locked onto the connecting plate (8) by the mechanical seal cover (9) and the positioning ring (20), respectively.

6. The asphalt transfer twin screw pump of claim 5, wherein, The rear cover (13) is provided with an oil cup (49) and a screw plug (48).

7. The asphalt transfer twin screw pump of claim 6 wherein, A level gauge (21) is provided on the rear cover (13).

8. The asphalt transfer twin screw pump of claim 7, wherein, A hollow structure is formed between the connecting plate (8) and the bearing seat (11).

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