Replacement-free unloading pump for chemical unloading

Abstract

The utility model discloses a replacement-free unloading pump for chemical unloading, which belongs to the technical field of unloading pumps and comprises a mounting cylinder, a driving sleeve rotationally arranged in the mounting cylinder, a driving motor, a clutch mechanism and two groups of pump bodies. The driving motor is installed in the radial direction of the installation cylinder, the output end of the driving motor extends into the installation cylinder, a gear transmission structure is arranged between the output end of the driving motor and the driving sleeve, and the clutch mechanism is located in the installation cylinder and used for controlling the driving sleeve to drive different pump bodies to operate. According to the replacement-free unloading pump for chemical unloading, the two completely independent pump bodies are arranged, so that methanol and ethanol are completely separated in the conveying process, and the risk of cross contamination of materials caused by sharing of the pump bodies is fundamentally eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of truck unloading pumps, and in particular relates to a replacement-free truck unloading pump for chemical truck unloading. Background Art

[0002] Methanol unloading pumps are mainly used in the storage and transportation of methanol, including the transfer from transport vehicles to storage tanks, and the transportation from storage tanks to production equipment. In the petrochemical, coal chemical and other industries, methanol unloading pumps are one of the indispensable equipment.

[0003] In the ethylene glycol production process, the ethylene glycol center finished product tank area is often equipped with a return methanol tank for use when the low-temperature methanol washing device is shut down. It is usually empty. In order to maximize its storage function, the ethanol storage tank is used when the device is operating normally, and the marketing department is cooperated to carry out ethanol trade. The methanol unloading pump used for the return methanol needs to be used as a methanol / ethanol unloading dual-purpose.

[0004] When the existing methanol unloading pump is used for both methanol and ethanol unloading, different materials enter the pump body of the unloading pump, and there is a risk of material cross-contamination and mutual contamination. Before the methanol unloading pump changes the conveying medium, the material in the pump needs to be replaced and the conveying process needs to be confirmed to ensure that the conveying medium and process are correct. The operating process is cumbersome and there is a risk of contamination.

[0005] To this end, we proposed a replacement-free unloading pump for chemical unloading to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the problem in the prior art that different materials enter the pump body of the unloading pump, resulting in the risk of mutual mixing and mutual contamination of materials, and proposes a replacement-free unloading pump for chemical unloading.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A replacement-free unloading pump for chemical unloading comprises a mounting barrel, a driving sleeve rotatably arranged in the mounting barrel, a driving motor, a clutch mechanism and two groups of pump bodies, wherein the two groups of pump bodies are symmetrically mounted at both ends of the mounting barrel and remain coaxial with the mounting barrel, the driving motor is radially mounted along the mounting barrel and the output end of the driving motor extends into the mounting barrel, a gear transmission structure is arranged between the output end of the driving motor and the driving sleeve, and the clutch mechanism is located in the mounting barrel and is used to control the driving sleeve to drive different pump bodies to operate.

[0009] Preferably, the pump body includes a volute-shaped outer shell, the outer shell has a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is installed at the side axis position of the outer shell, the liquid outlet pipe is installed at the bottom tangent position of the outer shell, a central shaft extending into the installation cylinder is rotatably arranged in the outer shell, and an impeller is fixedly arranged on the central shaft.

[0010] Preferably, a ring groove is formed on the driving sleeve, a support rod is fixedly installed in the installation cylinder, and the support rod is rotatably connected with the ring groove.

[0011] Preferably, the gear transmission structure includes a bevel gear one fixedly arranged at the output end of the driving motor, a bevel gear two is fixedly installed on the driving sleeve, and the bevel gear one and the bevel gear two are meshed with each other.

[0012] Preferably, the clutch mechanism includes a driving shaft slidably arranged in the driving sleeve, friction wheels are fixedly installed at both ends of the driving shaft and at one end of the central shaft close to the driving shaft, and a control structure for controlling the movement of the central shaft is slidably arranged on the installation cylinder.

[0013] Preferably, the control structure includes an installation card rotatably connected with the driving shaft, a control rod is fixedly installed on the outer wall of the installation card, the control rod penetrates through a notch formed on the installation cylinder, and a threaded ring is fixedly arranged at the end of the control rod, and a threaded rod is rotatably arranged on the outer wall of the installation cylinder, and the threaded ring is threadedly connected with the threaded rod.

[0014] Preferably, the cross section of the driving shaft is polygonal.

[0015] Preferably, positioning columns are coaxially arranged at both ends of the driving shaft, and the positioning columns are slidably connected with the central shaft.

[0016] Preferably, friction strips are arranged on the friction surfaces of the friction wheels.

[0017] In summary, the technical effects and advantages of the present invention: for the chemical unloading vehicle with a pump that does not require replacement for unloading, by setting two completely independent pump bodies, the transportation processes of methanol and ethanol are completely separated, fundamentally eliminating the risk of material cross-contamination caused by sharing a pump body, ensuring the purity of chemicals and product quality during transportation, meeting high-standard production and safety requirements. By flexibly controlling the independent driving of different pump bodies by the driving motor through the clutch mechanism, users can quickly switch the transportation medium according to actual needs without complicated pump body cleaning or material replacement processes, greatly shortening the operation preparation time and improving the overall operation efficiency. Since each pump body works independently, it avoids the problems of increased internal wear or frequent failures of the pump body caused by frequent material switching, reduces the maintenance workload and downtime, and is beneficial to reducing the maintenance cost and extending the service life of the equipment. Description of the Drawings

[0018] Figure 1 Schematic diagram of the internal structure of the present utility model;

[0019] Figure 2 Schematic diagram of the overall structure of the present utility model;

[0020] Figure 3 Schematic diagram of the sectional structure of the present utility model;

[0021] Figure 4 Schematic diagram of the exploded structure of the clutch mechanism in the present utility model.

[0022] In the figure: 1, mounting cylinder; 11, driving sleeve; 12, support rod; 13, bevel gear II; 14, threaded rod; 2, driving motor; 21, bevel gear I; 3, clutch mechanism; 31, driving shaft; 32, friction wheel; 33, mounting clamp; 34, control rod; 35, threaded ring; 36, positioning column; 4, pump body; 41, housing; 42, liquid inlet pipe; 43, liquid outlet pipe; 44, central shaft; 45, impeller. Specific embodiments

[0023] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0024] Refer to Figures 1-4 , a chemical unloading vehicle with a pump that does not require replacement, including a mounting cylinder 1, a driving sleeve 11 rotatably arranged in the mounting cylinder 1, a driving motor 2, a clutch mechanism 3, and two groups of pump bodies 4.

[0025] This unloading pump is installed on the methanol unloading crane position of the loading and unloading platform. The methanol in the methanol transport vehicle is pressurized by the unloading pump and then transported through a pipeline to the methanol tank for returning materials in the intermediate tank area. At the same time, the unloading pipeline for externally purchased ethanol is connected. When the methanol raw material tank is idle, the externally purchased ethanol is unloaded to the methanol tank for returning materials through the unloading pump. Among them, the two groups of pump bodies 4 are respectively connected to the methanol unloading pipeline and the ethanol unloading pipeline.

[0026] The driving motor 2 is used to provide power for the unloading pump. The power of the driving motor 2 is transmitted to the driving sleeve 11, and the clutch mechanism 3 distributes the power of the driving sleeve 11 to different pump bodies 4. Therefore, the two groups of pump bodies 4 can work independently, completely separating the transportation processes of methanol and ethanol, fundamentally eliminating the risk of material cross-contamination caused by sharing the unloading pump, ensuring the purity of chemicals and product quality during the transportation process, meeting high-standard production and safety requirements, and after switching the transportation medium, there is no need for complex cleaning of the pump body 4 or material replacement process, greatly shortening the operation preparation time and improving the overall operation efficiency.

[0027] Two groups of pump bodies 4 are symmetrically installed at both ends of the installation cylinder 1 and are coaxial with the installation cylinder 1. The driving motor 2 is installed radially along the installation cylinder 1, and the output end of the driving motor 2 extends into the installation cylinder 1. A gear transmission structure is provided between the output end of the driving motor 2 and the driving sleeve 11.

[0028] Referring to Figures 1-4 , a ring groove is provided on the driving sleeve 11. A support rod 12 is fixedly installed in the installation cylinder 1. The support rod 12 is rotatably connected to the ring groove. The support rod 12 provides support for the driving sleeve 11 to ensure the stable rotation of the driving sleeve 11 in the installation cylinder 1. The ring groove plays a role in limiting, reducing the risk of axial offset of the driving sleeve 11.

[0029] Referring to Figures 1-4 , the gear transmission structure includes a bevel gear one 21 fixedly arranged at the output end of the driving motor 2. A bevel gear two 13 is fixedly installed on the driving sleeve 11. The bevel gear one 21 and the bevel gear two 13 are meshed with each other. After the driving motor 2 is started, the bevel gear one 21 is driven to rotate, driving the bevel gear two 13 to rotate, realizing the transmission with the driving sleeve 11.

[0030] The clutch mechanism 3 is located in the installation cylinder 1 and is used to control the driving sleeve 11 to drive different pump bodies 4 to operate. Through the clutch mechanism 3, the power of the driving sleeve 11 can be distributed to different pump bodies 4 according to the use needs, and then different materials can be transported.

[0031] Referring to Figures 1-2 , the pump body 4 includes a spiral-shaped outer shell 41. The outer shell 41 has a liquid inlet pipe 42 and a liquid outlet pipe 43. When pumping materials, the materials enter the outer shell 41 through the liquid inlet pipe 42 and are output through the liquid outlet pipe 43. The liquid inlet pipe 42 is installed at the side axis position of the outer shell 41, and the liquid outlet pipe 43 is installed at the bottom tangent position of the outer shell 41. A central shaft 44 extending into the installation cylinder 1 is rotatably arranged in the outer shell 41. An impeller 45 is fixedly arranged on the central shaft 44. When the driving sleeve 11 drives the central shaft 44 to rotate, the materials entering the outer shell 41 generate centrifugal force under the rotation of the impeller 45, so that the materials are thrown outwards and are output from the liquid outlet pipe 43 in a high-pressure state.

[0032] Referring to Figures 3-4 , the clutch mechanism 3 includes a driving shaft 31 slidably arranged in the driving sleeve 11. The driving sleeve 11 rotates to drive the driving shaft 31 to rotate and maintains effective transmission during the movement of the driving shaft 31. Friction wheels 32 are fixedly installed at both ends of the driving shaft 31 and at one end of the central shaft 44 close to the driving shaft 31. A control structure for controlling the movement of the central shaft 44 is slidably arranged on the installation cylinder 1. The axial movement of the driving shaft 31 is controlled through the control structure. When the friction wheel 32 on the driving shaft 31 abuts against the friction wheel 32 on the central shaft 44, the power is transmitted to the central shaft 44, and then the impeller 45 is driven to rotate.

[0033] Reference Figures 3-4 The control structure includes a mounting card 33 rotatably connected to the drive shaft 31. The rotation of the drive shaft 31 does not affect the position of the mounting card 33. A control rod 34 is fixedly installed on the outer wall of the mounting card 33. The control rod 34 passes through a slot provided on the mounting cylinder 1, and a threaded ring 35 is fixedly provided on the end of the control rod 34. A threaded rod 14 is rotatably provided on the outer wall of the mounting cylinder 1. The threaded ring 35 is threadedly connected to the threaded rod 14. By rotating the threaded rod 14, the threaded ring 35 can be driven to axially displace under the action of the thread, thereby driving the mounting card 33 to move, so that the mounting card 33 pushes the drive shaft 31 to change its position.

[0034] Reference Figures 3-4 The cross section of the driving shaft 31 is a polygon, so that the driving shaft 31 and the driving sleeve 11 can slide axially and transmit effectively at the same time.

[0035] Reference Figures 3-4 , positioning columns 36 are coaxially arranged at both ends of the driving shaft 31, and the positioning columns 36 are slidably connected to the central shaft 44. The positioning columns 36 can improve the alignment stability between the driving shaft 31 and the central shaft 44, and the cross-section of the positioning columns 36 is circular. When the friction wheel 32 is not in contact, no effective transmission is performed, thereby reducing the power loss of the driving motor 2.

[0036] Reference Figures 3-4 A friction strip is provided on the friction surface of the friction wheel 32, so that when the two friction wheels 32 are in contact, the friction resistance of the friction wheel 32 is increased, and the transmission efficiency is improved under the action of the friction strip.

[0037] Working principle:

[0038] When in use, the unloading pump is installed on the methanol unloading crane position on the loading and unloading platform. The methanol in the methanol transport vehicle is pressurized by the unloading pump and transported to the return methanol tank in the intermediate tank area through the pipeline. At the same time, the unloading pipeline of the purchased ethanol is connected. When the methanol raw material tank is idle, the purchased ethanol is unloaded to the return methanol tank through the unloading pump, wherein the two groups of pump bodies 4 are respectively connected to the methanol unloading pipeline and the ethanol unloading pipeline;

[0039] When discharging, start the driving motor 2. After the driving motor 2 starts, the driving bevel gear one 21 rotates, driving the bevel gear two 13 to rotate, realizing the transmission with the driving sleeve 11. The driving sleeve 11 rotates to drive the driving shaft 31 to rotate. By rotating the threaded rod 14, the threaded ring 35 can be axially displaced under the action of the thread, driving the mounting clamp 33 to move, so that the mounting clamp 33 pushes the driving shaft 31 to change its position, making the friction wheel 32 on the driving shaft 31 abut against the friction wheel 32 on the pump body 4 to be operated, transmitting the power to the central shaft 44, and then driving the impeller 45 to rotate. The material enters the housing 41 from the liquid inlet pipe 42. The material entering the housing 41 generates centrifugal force under the rotation of the impeller 45, causing the material to be thrown outwards and output from the liquid outlet pipe 43 in a high-pressure state.

Claims

1. A chemical unloading vehicle with a pump that does not require replacement for unloading, comprising an installation cylinder (1), a driving sleeve (11) rotatably arranged in the installation cylinder (1), a driving motor (2), a clutch mechanism (3) and two groups of pump bodies (4), characterized in that, Two groups of the pump bodies (4) are symmetrically installed at both ends of the installation cylinder (1) and are coaxial with the installation cylinder (1). The driving motor (2) is installed radially along the installation cylinder (1), and the output end of the driving motor (2) extends into the installation cylinder (1). A gear transmission structure is arranged between the output end of the driving motor (2) and the driving sleeve (11). The clutch mechanism (3) is located in the installation cylinder (1) and is used to control the driving sleeve (11) to drive different pump bodies (4) to operate.

2. The chemical unloading vehicle uses a displacement-free unloading pump according to claim 1, characterized in that, The pump body (4) includes a volute-shaped outer shell (41). The outer shell (41) has a liquid inlet pipe (42) and a liquid outlet pipe (43). The liquid inlet pipe (42) is installed at the side axis position of the outer shell (41), and the liquid outlet pipe (43) is installed at the bottom tangent position of the outer shell (41). A central shaft (44) extending into the installation cylinder (1) is rotatably arranged in the outer shell (41), and an impeller (45) is fixedly arranged on the central shaft (44).

3. The chemical unloading vehicle replacement-free unloading pump according to claim 1, wherein, A ring groove is formed on the driving sleeve (11), and a support rod (12) is fixedly installed in the installation cylinder (1). The support rod (12) is rotatably connected to the ring groove.

4. A chemical unloading vehicle's replacement-free unloading pump according to claim 1, characterized in that, The gear transmission structure includes a first bevel gear (21) fixedly arranged at the output end of the driving motor (2), and a second bevel gear (13) is fixedly installed on the driving sleeve (11). The first bevel gear (21) and the second bevel gear (13) are meshed with each other.

5. The chemical unloading vehicle uses a displacement-free unloading pump according to claim 1, characterized in that, The clutch mechanism (3) includes a driving shaft (31) slidably arranged in the driving sleeve (11). Friction wheels (32) are fixedly installed at both ends of the driving shaft (31) and at one end of the central shaft (44) close to the driving shaft (31). A control structure for controlling the movement of the central shaft (44) is slidably arranged on the installation cylinder (1).

6. The chemical unloading vehicle's displacement-free unloading pump according to claim 5, characterized in that, The control structure includes an installation card (33) rotatably connected to the driving shaft (31). A control rod (34) is fixedly installed on the outer wall of the installation card (33). The control rod (34) penetrates through a notch formed on the installation cylinder (1), and a threaded ring (35) is fixedly arranged at the end of the control rod (34). A threaded rod (14) is rotatably arranged on the outer wall of the installation cylinder (1), and the threaded ring (35) is threadedly connected to the threaded rod (14).

7. The chemical unloading vehicle replacement-free unloading pump according to claim 6, wherein The cross section of the driving shaft (31) is polygonal.

8. A chemical unloading vehicle with a displacement-free unloading pump according to claim 6, characterized in that, Positioning columns (36) are coaxially arranged at both ends of the driving shaft (31), and the positioning columns (36) are slidably connected to the central shaft (44).

9. The chemical unloading vehicle displacement-free unloading pump according to claim 6, characterized in that, Friction strips are arranged on the friction surfaces of the friction wheels (32).

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