Valve assembly for injecting sulfuric acid into tank car

Abstract

The utility model discloses a valve assembly for injecting sulfuric acid into a tank car, which relates to the field of valves and comprises a valve body, a shell is mounted at the top of the valve body, and a worm is connected inside the shell through a sealing bearing. Through the arrangement of the filter screen, the oil inlet cylinder, the oil injection pipe and the oil storage tank, when the worm, the worm gear, the driving bevel gear and the driven bevel gear need to be lubricated, it is determined that sulfuric acid does not need to be conveyed through a pipeline, meanwhile, sulfuric acid does not flow into the valve body, and at the moment, a worker can rotate the threaded sealing cover to lubricate the worm, the worm gear, the driving bevel gear and the driven bevel gear. The threaded sealing cover is screwed out of the oil inlet cylinder, then the motor is started, so that the driving bevel gear, the driven bevel gear, the worm and the worm gear rotate slowly, a worker injects lubricating oil into the oil inlet pipe, the filter screen can filter the lubricating oil, and the lubricating oil flows into the oil injection pipe after being filtered and flows to the meshing position of the worm and the worm gear. Therefore, the worm gear and the worm can be lubricated firstly.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically a valve assembly for injecting sulfuric acid into a tanker truck. Background Technology

[0002] The valve assembly for injecting sulfuric acid into tank trucks is a specialized piece of equipment used in chemical and other fields to automate and precisely inject sulfuric acid into tank trucks. It mainly consists of valves, electric actuators, and piping. The valve is the core component of the assembly and is typically made of materials with excellent corrosion resistance, such as fluoropolymer-lined valves or stainless steel valves. The valve is selected based on actual needs and operating conditions to meet functions such as flow control and pressure regulation during the sulfuric acid injection process. The electric actuator, connected to the valve, drives its opening and closing. It receives electrical signals from the control system and converts electrical energy into mechanical energy through internal components such as a motor and reducer, achieving precise control of the valve.

[0003] Existing valve assemblies for injecting sulfuric acid into tank trucks typically use electric valves for easy automatic control. These valves generally consist of a valve body, valve core, and control box. The control box contains a motor, gears, worm gears, and other transmission structures to drive the valve core's opening and closing. However, after prolonged use, the gears and worm gears require lubrication to improve transmission efficiency. Before lubrication, the control box top cover must be removed to apply lubricant to the gears. Removing the top cover requires unscrewing several bolts, and after lubrication, it must be reinstalled. This process is time-consuming and cumbersome, hindering gear lubrication. Furthermore, the gears are usually located at the bottom of the control box, limiting space and making it difficult for operators to apply lubricant, further reducing lubrication efficiency. Summary of the Invention

[0004] Therefore, the purpose of this utility model is to provide a valve assembly for injecting sulfuric acid into a tanker truck, so as to solve the technical problem of inconvenience in lubricating the gears, worm gears and worms in the control box.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a valve assembly for injecting sulfuric acid into a tanker truck, comprising a valve body, a housing mounted on the top of the valve, a worm gear connected inside the housing via a sealed bearing, a rotating shaft connected to the lower part of the housing via a sealed bearing, an oil storage tank also mounted on the lower part of the housing, and an oil drain pipe extending to the outside of the housing connected to one side of the oil storage tank, a threaded plug threaded to one end of the oil drain pipe, a top cover mounted on all four sides of the top of the housing via fastening bolts, an oil injection pipe mounted on the top cover, an oil inlet cylinder mounted at the top of the oil injection pipe, a gasket fixed inside the oil inlet cylinder, a filter screen placed on the top of the gasket, and a pull rod fixed on the top of the filter screen, and a through hole opened inside the oil storage tank, with a first sealing ring installed on the inner wall of the through hole.

[0006] By adopting the above technical solution, when it is necessary to drain the old lubricating oil in the oil tank, the operator can rotate the threaded plug to make the threaded plug unscrew from the oil drain pipe, and then no longer block the oil drain pipe.

[0007] Furthermore, the top end of the oil inlet cylinder is threadedly connected to a threaded sealing cap, and the inner wall of the threaded sealing cap is provided with an annular sealing body made of perfluoroether rubber material.

[0008] By adopting the above technical solution, the threaded sealing cover can seal the oil inlet cylinder, preventing external dust or impurities from entering the housing through the oil inlet cylinder.

[0009] Furthermore, the rotating shaft passes through the through hole, and the outer wall of the rotating shaft fits against the inner wall of the first sealing ring.

[0010] By adopting the above technical solution, the shaft can rotate easily, and the first sealing ring can improve the sealing between the shaft and the through hole, preventing lubricating oil from flowing down into the valve body through the gap between the shaft and the through hole.

[0011] Furthermore, the bottom end of the rotating shaft extends into the interior of the valve body and is fitted with a valve core, and a third sealing ring made of perfluoroether rubber is installed between the rotating shaft and the valve body.

[0012] By adopting the above technical solution, the installation of the third sealing ring can improve the sealing performance between the rotating shaft and the valve body.

[0013] Furthermore, a motor is installed on one side of the interior of the housing, and the output end of the motor is connected to a drive bevel gear.

[0014] By adopting the above technical solution, when the motor is working, it can drive the active bevel gear to rotate, and the active bevel gear will drive the driven bevel gear to rotate.

[0015] Furthermore, one end of the worm gear is fixed with a drive shaft extending to the outside of the housing, and a handwheel is installed at one end of the drive shaft. A second sealing ring made of perfluoroether rubber is installed on one side of the housing, and the outer wall of the drive shaft is in contact with the second sealing ring.

[0016] By adopting the above technical solution, the setting of the second sealing ring can improve the sealing between the drive shaft and the housing, and when the valve needs to be opened or closed manually, the operator can rotate the drive shaft by handwheel.

[0017] Furthermore, a driven bevel gear is mounted on the outer wall of the drive shaft, and the driving bevel gear meshes with the driven bevel gear. The diameter of the driving bevel gear is smaller than the diameter of the driven bevel gear.

[0018] By adopting the above technical solution, when the driving bevel gear rotates, it will drive the driven bevel gear to rotate, which in turn will drive the transmission shaft to rotate.

[0019] Furthermore, a worm gear is installed at the top of the shaft, and the worm gear meshes with the worm.

[0020] By adopting the above technical solution, when the worm rotates, it will drive the worm wheel to rotate, and the worm wheel will drive the shaft to rotate.

[0021] Furthermore, a sealing strip is installed at the bottom of the top cover, and the sealing strip is made of perfluoroether rubber material, and the outer wall of the sealing strip is in contact with the inner wall of the housing.

[0022] By adopting the above technical solution, the sealing strip is designed to improve the sealing performance between the top cover and the housing.

[0023] Furthermore, the top cover is detachably connected to the housing, and an observation window is installed on the top cover, which is made of quartz glass.

[0024] By adopting the above technical solution, the observation window facilitates observation of the internal condition of the housing, and the observation window made of quartz glass has corrosion resistance.

[0025] In summary, the present invention has the following main advantages:

[0026] 1. This utility model, equipped with a filter screen, oil inlet cylinder, oil injection pipe, and oil storage tank, allows for lubrication of the worm gear, worm wheel, driving bevel gear, and driven bevel gear. First, it is ensured that sulfuric acid is not being transported through pipelines and that sulfuric acid no longer flows into the valve body. Then, the operator can rotate the threaded sealing cap to unscrew it from the oil inlet cylinder. Next, the motor is started, causing the driving bevel gear, driven bevel gear, worm gear, and worm wheel to rotate slowly. The operator then injects lubricating oil into the oil inlet pipe. The filter screen filters the lubricating oil, preventing impurities from entering the housing through the oil injection pipe, thus ensuring proper lubrication. After being filtered, the oil flows into the oil injection pipe and then to the meshing point of the worm and worm wheel, thus lubricating the worm and worm wheel first. Some of the lubricating oil flows into the oil reservoir. As the lubricating oil level in the reservoir rises, the part of the driven bevel gear located in the reservoir is immersed in the lubricating oil. As the driven bevel gear and the driving bevel gear continue to rotate, lubrication is achieved. At the same time, the operator can observe the oil level in the reservoir through the observation window. This method allows for lubrication of the worm and other transmission structures without removing the top cover, thus simplifying the lubrication operation and improving lubrication efficiency.

[0027] 2. This utility model is equipped with a gasket and a pull rod. The gasket can support the filter screen and improve its stability. When the filter screen needs to be removed, the operator can pull the pull rod upward to move the filter screen out of the oil inlet cylinder, thus cleaning the impurities on the filter screen.

[0028] 3. This utility model is equipped with an oil drain pipe and a threaded plug. When it is necessary to drain the old lubricating oil in the oil storage tank, the operator can first place the collection box directly below the oil drain pipe, then rotate the threaded plug so that the threaded plug is unscrewed from the oil drain pipe, and then the oil drain pipe is no longer blocked. At this time, the lubricating oil in the oil storage tank will be discharged through the oil drain pipe and flow into the collection box. By providing a threaded sealing cap, the threaded sealing cap can block the oil inlet cylinder to prevent external dust or impurities from entering the housing through the oil inlet cylinder. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the overall side sectional structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the valve core structure of this utility model;

[0033] Figure 5 This is a schematic diagram of the oil storage tank structure of this utility model;

[0034] Figure 6 This is a schematic diagram of the worm gear structure of this utility model;

[0035] Figure 7 This is a schematic diagram of the worm gear structure of this utility model;

[0036] Figure 8 For the present utility model Figure 3 A magnified structural diagram of point A in the middle.

[0037] In the diagram: 1. Valve body; 2. Housing; 3. Top cover; 4. Sealing strip; 5. Fastening bolt; 6. Motor; 7. Driving bevel gear; 8. Driven bevel gear; 9. Worm gear; 10. Drive shaft; 11. Handwheel; 12. Worm gear; 13. Rotating shaft; 14. Valve core; 15. Oil reservoir; 16. Oil drain pipe; 17. Threaded plug; 18. Oil filling pipe; 19. Observation window; 20. Oil inlet cylinder; 21. Washer ring; 22. Threaded sealing cap; 23. Filter screen; 24. Pull rod; 25. First sealing ring; 26. Second sealing ring; 27. Through hole; 28. Third sealing ring; 29. ​​Wire hole. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] The embodiments of this utility model will be described below based on its overall structure.

[0040] Example 1

[0041] A valve assembly for injecting sulfuric acid into a tanker truck, such as Figures 1-8As shown, the device includes a valve body 1, a housing 2 mounted on top of the valve body 1, a worm gear 9 connected to the inside of the housing 2 via a sealed bearing, a rotating shaft 13 connected to the lower inside of the housing 2 via a sealed bearing, an oil reservoir 15 mounted on the lower inside of the housing 2, and an oil drain pipe 16 extending to the outside of the housing 2 connected to one side of the oil reservoir 15. A threaded plug 17 is threaded to one end of the oil drain pipe 16, the outer wall of the threaded plug 17 has anti-slip texture, and a sealing ring made of perfluoroether rubber is installed on the outer wall of the threaded plug 17. The sealing ring fits against the inner wall of the oil drain pipe 16. A top cover 3 is mounted on all four sides of the top of the housing 2 via fastening bolts 5. The fastening bolts 5 are made of duplex stainless steel 2205 and coated with perfluoroethylene propylene (FEP). The coating is provided, and an oil injection pipe 18 is installed on the top cover 3. An oil inlet cylinder 20 is installed at the top of the oil injection pipe 18, and a gasket 21 is fixed inside the oil inlet cylinder 20. A filter screen 23 is placed on the top of the gasket 21, and a pull rod 24 is fixed on the top of the filter screen 23. The filter screen 23 is detachably connected to the oil inlet cylinder 20. The filter screen 23 is made of Hastelloy material. The operator can pull the filter screen 23 through the pull rod 24 to move the filter screen 23 upward, thereby making it easy to remove the filter screen 23.

[0042] See Figures 2-7 An oil reservoir 15 has a through hole 27, and a first sealing ring 25 is installed on the inner wall of the through hole 27. The first sealing ring 25 is made of perfluoroether rubber. When it is necessary to drain the old lubricating oil in the oil reservoir 15, the operator can rotate the threaded plug 17 to unscrew it from the drain pipe 16, and then the drain pipe 16 is no longer blocked. The rotating shaft 13 passes through the through hole 27, and the outer wall of the rotating shaft 13 fits against the inner wall of the first sealing ring 25, which facilitates the rotation of the rotating shaft 13. At the same time, the setting of the first sealing ring 25 can improve the connection between the rotating shaft 13 and the through hole 27. The sealing between the holes 27 prevents lubricating oil from flowing downwards into the valve body 1 through the gap between the shaft 13 and the through hole 27. The bottom end of the shaft 13 extends into the valve body 1 and is fitted with a valve core 14. A third sealing ring 28 made of perfluoroether rubber is installed between the shaft 13 and the valve body 1. The third sealing ring 28 improves the sealing between the shaft 13 and the valve body 1. The oil injection pipe 18 is located above the meshing point of the worm gear 12 and the worm 9 so that lubricating oil can flow into the meshing point of the worm gear 12 and the worm 9 through the oil injection pipe 18.

[0043] Specifically, a motor 6 is installed on one side of the interior of the housing 2. The motor 6 is electrically connected to the external control panel via a cable. A cable hole 29 is provided on the back of the housing 2, through which the cable can pass. An O-ring made of perfluoroether rubber is installed inside the cable hole 29, and the outer wall of the cable fits against the O-ring, thereby improving the sealing between the cable and the cable hole 29 and preventing external dust or impurities from entering the interior of the housing 2 through the cable hole 29. The output end of the motor 6 is connected to a drive bevel gear 7. When the motor 6 is working, it can drive the drive bevel gear 7 to rotate, and the drive bevel gear 7 drives the driven bevel gear 8 to rotate. One end of the worm gear 9 is fixed with an extension A drive shaft 10 extends to the outside of the housing 2, and a handwheel 11 is installed at one end of the drive shaft 10. A second sealing ring 26 made of perfluoroether rubber is installed on one side of the housing 2. The outer wall of the drive shaft 10 fits against the second sealing ring 26. The second sealing ring 26 can improve the sealing between the drive shaft 10 and the housing 2. When the valve needs to be opened or closed manually, the operator can rotate the drive shaft 10 through the handwheel 11. The bottom of the driven bevel gear 8 is located inside the oil reservoir 15 to lubricate the driven bevel gear 8. The oil reservoir 15 is located directly below the worm 9 and the worm wheel 12. The oil reservoir 15 can collect lubricating oil.

[0044] See Figures 2-8 A driven bevel gear 8 is mounted on the outer wall of the drive shaft 10. A driving bevel gear 7 meshes with the driven bevel gear 8. The diameter of the driving bevel gear 7 is smaller than the diameter of the driven bevel gear 8. When the driving bevel gear 7 rotates, it drives the driven bevel gear 8 to rotate, which in turn drives the drive shaft 10 to rotate. A worm gear 12 is mounted on the top of the rotating shaft 13. The worm gear 12 meshes with the worm 9. When the worm 9 rotates, it drives the worm gear 12 to rotate, which in turn drives the rotating shaft 13 to rotate. The top of the oil inlet cylinder 20 is threaded... A threaded sealing cap 22 is provided. The inner wall of the threaded sealing cap 22 is provided with an annular sealing body made of perfluoroether rubber material. The outer wall of the threaded sealing cap 22 is provided with anti-slip texture. The threaded sealing cap 22 can seal the oil inlet cylinder 20 to prevent external dust or impurities from entering the housing 2 through the oil inlet cylinder 20. The top cover 3 is detachably connected to the housing 2. The worm gear 12, worm 9, driving bevel gear 7, driven bevel gear 8, rotating shaft 13 and transmission shaft 10 are all made of duplex stainless steel 2205 material.

[0045] Example 2

[0046] Based on the above embodiment 1, in order to improve the sealing between the top cover 3 and the housing 2, the following structure will be set.

[0047] Specifically, a sealing strip 4 is installed at the bottom of the top cover 3, and the sealing strip 4 is made of perfluoroether rubber material. The outer wall of the sealing strip 4 is in contact with the inner wall of the housing 2. The sealing strip 4 is designed to improve the sealing between the top cover 3 and the housing 2, and to prevent external dust from entering the interior of the housing 2 through the gap between the top cover 3 and the housing 2.

[0048] Example 3

[0049] Based on the above embodiment 1, in order to facilitate the staff to observe the situation inside the housing 2 and the lubricating oil level inside the oil tank 15, the following structure will be set.

[0050] See Figures 1-3 An observation window 19 is installed on the top cover 3. The observation window 19 is made of quartz glass. The observation window 19 is designed to facilitate observation of the internal condition of the housing 2. The observation window 19 made of quartz glass has corrosion resistance.

[0051] The working principle of this utility model is as follows: First, before use, the operator can connect the power supply. When it is necessary to open the valve, the motor 6 can be started. The motor 6 drives the active bevel gear 7 to rotate, which in turn drives the driven bevel gear 8 to rotate, which in turn drives the transmission shaft 10 to rotate. The transmission shaft 10 drives the worm 9 to rotate, which in turn drives the worm wheel 12 to rotate, which in turn drives the rotating shaft 13 to rotate. The rotating shaft 13 drives the valve core 14 to rotate. After the valve core 14 rotates and opens, sulfuric acid can flow in the valve body 1.

[0052] When lubrication is required for the worm 9, worm wheel 12, driving bevel gear 7, and driven bevel gear 8, first ensure that sulfuric acid is not being transported through pipelines and that sulfuric acid is no longer flowing into the valve body 1. Then, the operator can rotate the threaded sealing cap 22 to unscrew it from the oil inlet cylinder 20. Next, start the motor 6 or manually rotate the handwheel 11 to slowly rotate the driving bevel gear 7, driven bevel gear 8, worm 9, and worm wheel 12. The operator then injects lubricating oil into the oil inlet cylinder 20. The filter screen 23 filters the lubricating oil, which then flows into the oil injection pipe 18 and to the meshing point of the worm 9 and worm wheel 12. This allows lubrication of the worm wheel 12 and worm gear 8 to be performed first. The rod 9 is lubricated, and some of the lubricating oil flows into the oil reservoir 15. As the lubricating oil level in the oil reservoir 15 rises, the part of the driven bevel gear 8 located in the oil reservoir 15 is immersed in the lubricating oil. As the driven bevel gear 8 and the driving bevel gear 7 continue to rotate, they can be lubricated. At the same time, when the operator injects lubricating oil into the oil inlet cylinder 20, the operator can observe the liquid level in the oil reservoir 15 through the observation window 19 to prevent the lubricating oil from flowing out of the oil reservoir 15 due to excessive lubricating oil. After the lubricating oil is added, the operator screws the threaded sealing cap 22 onto the oil inlet cylinder 20 to seal the oil inlet cylinder 20.

[0053] When it is necessary to drain the old lubricating oil from the oil reservoir 15, the operator can first place the collection box directly below the drain pipe 16, then rotate the threaded plug 17 so that the threaded plug 17 is unscrewed from the drain pipe 16, and then the drain pipe 16 is no longer blocked. At this time, the lubricating oil in the oil reservoir 15 will be discharged through the drain pipe 16 and flow into the collection box. After the lubricating oil is drained, the threaded plug 17 is screwed back into the drain pipe 16 to block the drain pipe 16.

[0054] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A valve assembly for injecting sulfuric acid into a tanker truck, comprising a valve body (1), characterized in that: A housing (2) is installed on the top of the valve body (1). A worm gear (9) is connected to the inside of the housing (2) via a sealed bearing. A rotating shaft (13) is connected to the lower inside of the housing (2) via a sealed bearing. An oil reservoir (15) is also installed at the lower inside of the housing (2). An oil drain pipe (16) extending to the outside of the housing (2) is connected to one side of the oil reservoir (15). A threaded plug (17) is threaded to one end of the oil drain pipe (16). The top of the housing (2) is surrounded by... All are fitted with a top cover (3) by fastening bolts (5), and an oil injection pipe (18) is installed on the top cover (3). An oil inlet cylinder (20) is installed at the top of the oil injection pipe (18), and a gasket (21) is fixed inside the oil inlet cylinder (20). A filter screen (23) is placed on the top of the gasket (21), and a pull rod (24) is fixed on the top of the filter screen (23). A through hole (27) is opened in the oil storage tank (15), and a first sealing ring (25) is installed on the inner wall of the through hole (27).

2. The valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: The top end of the oil inlet cylinder (20) is threadedly connected to a threaded sealing cap (22), and the inner wall of the threaded sealing cap (22) is provided with an annular sealing body made of perfluoroether rubber material.

3. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: The rotating shaft (13) passes through the through hole (27), and the outer wall of the rotating shaft (13) is in contact with the inner wall of the first sealing ring (25).

4. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: The bottom end of the rotating shaft (13) extends into the interior of the valve body (1) and is fitted with a valve core (14). A third sealing ring (28) made of perfluoroether rubber is installed between the rotating shaft (13) and the valve body (1).

5. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: A motor (6) is installed on one side of the inside of the housing (2), and the output end of the motor (6) is connected to a drive bevel gear (7).

6. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 5, characterized in that: One end of the worm (9) is fixed with a drive shaft (10) extending to the outside of the housing (2), and a handwheel (11) is installed at one end of the drive shaft (10). A second sealing ring (26) made of perfluoroether rubber material is installed on one side of the housing (2), and the outer wall of the drive shaft (10) is in contact with the second sealing ring (26).

7. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 6, characterized in that: The outer wall of the drive shaft (10) is fitted with a driven bevel gear (8), and the driving bevel gear (7) meshes with the driven bevel gear (8). The diameter of the driving bevel gear (7) is smaller than the diameter of the driven bevel gear (8).

8. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: A worm gear (12) is installed at the top of the shaft (13), and the worm gear (12) meshes with the worm (9).

9. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: The bottom of the top cover (3) is equipped with a sealing strip (4), which is made of perfluoroether rubber material, and the outer wall of the sealing strip (4) is in contact with the inner wall of the shell (2).

10. A valve assembly for injecting sulfuric acid into a tanker truck according to claim 1, characterized in that: The top cover (3) is detachably connected to the housing (2), and an observation window (19) is installed on the top cover (3). The observation window (19) is made of quartz glass.

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