A urea solution metering and dispensing device

Abstract

The utility model provides a kind of urea solution metering distribution device, it is related to urea solution metering injection pump technical field, including metering pump body, collection cylinder slidingly connected on metering pump body, pump body nozzle assembly is installed on metering pump body, further include backflow component, backflow component includes the guide rail fixedly connected on one side of metering pump body, hollow warehouse is connected with on guide rail by inner slide frame, hollow warehouse bottom is fixedly connected with bellow by breather pipe, in the utility model, bellow one end is formed more optimal backflow angle by lifting, ensure that residual solution backflow is more thorough, further reduce the risk of blockage, solve the limitation that existing joint is only passive connection, combine hollow warehouse, breather pipe and backflow component with pipeline connection function, give consideration to double functions of delivery sealing and residual processing, solve the core pain point of prior art.

Description

Technical Field

[0001] This utility model relates to the field of urea solution metering injection pump technology, and in particular to a urea solution metering and dispensing device. Background Technology

[0002] A urea solution metering and distribution device, also known as a urea metering pump, is a device that controls the amount of urea solution used and delivers it stably to a designated location. It solves the problem of how much to use and where to send it. It usually includes a metering module and a control unit, which can prevent waste due to excessive use or failure due to insufficient use. It is commonly used in scenarios such as automobile exhaust treatment and industrial waste gas denitrification, and is a key device to ensure the efficient and compliant use of urea solution.

[0003] However, in the existing technology, the existing urea metering pump is connected to the high-pressure pipeline leading to the nozzle through an outlet connector. In the existing technology, this connector is only a passive connection with a single function. After the pump stops, the pipeline between the outlet connector and the nozzle is sealed and contains pressurized residual urea solution, which is the direct cause of crystallization blockage. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a urea solution metering and dispensing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a urea solution metering and dispensing device, comprising a metering pump body, a collection cylinder slidably connected to the metering pump body, a pump nozzle assembly mounted on the metering pump body, and further comprising:

[0006] The reflux assembly includes a guide rail fixedly connected to one side of the metering pump body. A hollow chamber is connected to the guide rail via an inner sliding frame. A bellows pipe is fixedly connected to the bottom of the hollow chamber via a vent pipe. A sealing cap is threadedly connected to the top of the hollow chamber. A connecting rod is fixedly connected to the top of the guide rail. A transmission rod is connected to the inner sliding frame. A square frame is connected to the transmission rod. A transverse rod is fixedly connected to the square frame.

[0007] In a preferred embodiment, a transverse guide groove is provided on the guide rail, the inner slide frame is slidably connected in the transverse guide groove on the guide rail, a first rotating shaft is rotatably connected to the inner slide frame, the transmission rod is rotatably connected to the inner slide frame through the first rotating shaft, a second rotating shaft is rotatably connected to the end of the first rotating shaft away from the transmission rod, and the second rotating shaft is rotatably connected to the square frame.

[0008] The above technical solution is adopted: during use, two rotating shafts are set. The first rotating shaft facilitates the rotation between the transmission rod and the inner sliding frame, and the second rotating shaft facilitates the rotation between the transmission rod and the directional frame. The housing of the metering pump body has a longitudinal slot on the side near the second rotating shaft, which is used to limit the square frame. When the transmission rod gradually straightens, it will cause the directional frame to drive the horizontal rod to slide down.

[0009] In a preferred embodiment, a plate is slidably connected to the connecting rod, and a round rod is fixedly connected to the bottom of the plate. The round rod at the bottom of the plate is rotatably connected to the sealing cover.

[0010] The above technical solution involves placing a flat plate on the connecting rod during use, which facilitates the sliding of the connecting rod by the flat plate, thereby realizing the transmission of the transmission rod.

[0011] In a preferred embodiment, a transverse groove for guiding the connecting rod is provided on the top side of the guide rail near the connecting rod.

[0012] The above technical solution is adopted: during use, a transverse groove is opened on the top of the guide rail near the connecting rod to guide the connecting rod and avoid the connecting rod being blocked and unable to move.

[0013] In a preferred embodiment, a vertical rod is fixedly connected to the bottom of the pump body nozzle assembly, and a collection cylinder is slidably connected to the bottom of the vertical rod.

[0014] The above technical solution is adopted: during use, a vertical rod is fixedly connected to the bottom of the pump body nozzle assembly, and the vertical rod is inserted into the collection tank to facilitate the delivery of the solution.

[0015] In a preferred embodiment, the pump body nozzle assembly is mounted on the metering pump body via a bellows.

[0016] The above technical solution is adopted: the pump body nozzle assembly is fixedly connected to the liquid storage tank located at the bottom of the metering pump through a bellows. When the metering pump body is started, the solution is transported to the pump body nozzle assembly through the bellows.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0018] This invention utilizes a reflux assembly and gravity reflux design. After the metering pump completes distribution, the operator can unscrew the top sealing cap of the hollow chamber to expose the vent pipe opening. This allows residual solution in the pipeline and nozzles to flow back to the metering pump body along the corrugated pipe and vent pipe, eliminating crystallization blockage caused by residual liquid stagnation and pressure. Simultaneously, when the hollow chamber is pulled outward, the inner sliding frame and transmission rod can drive the horizontal rod and pump body nozzle assembly to slide upward, causing one end of the corrugated pipe to tilt upward to form a better reflux angle, ensuring more thorough reflux of residual solution and further reducing the risk of blockage. This invention overcomes the limitations of existing connectors that only provide passive connection, combining the reflux components such as the hollow chamber and vent pipe with the pipeline connection function to achieve a stable connection during solution transportation. The sealing gasket on the inner wall of the sealing cap ensures airtightness, combining the dual functions of transportation sealing and residual treatment, thus solving the core pain points of existing technologies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a urea solution metering and dispensing device provided by this utility model.

[0020] Figure 2 This utility model provides a schematic diagram of the guide rail and pump body nozzle assembly structure of a urea solution metering and dispensing device.

[0021] Figure 3 A schematic diagram showing the connection relationship between the transmission rod and the transverse rod in a urea solution metering and dispensing device provided by this utility model.

[0022] Figure 4 A schematic diagram of the vent pipe position of a urea solution metering and dispensing device provided by this utility model.

[0023] Figure 5 A schematic diagram showing the positional relationship between the pump body nozzle assembly and the bellows in a urea solution metering and dispensing device provided by this utility model.

[0024] Legend:

[0025] 1. Metering pump body; 11. Collection cylinder; 12. Pump body nozzle assembly; 13. Vertical rod;

[0026] 2. Reflux assembly; 21. Guide rail; 22. Transmission rod; 23. First rotating shaft; 24. Second rotating shaft; 25. Hollow chamber; 26. Sealing cover; 27. Inner sliding frame; 28. Bellows; 29. ​​Square frame; 210. Horizontal rod; 211. Vent pipe;

[0027] 3. Connecting rod; 31. Plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1 to 4 As shown, the present invention provides a technical solution: a urea solution metering and dispensing device, comprising a metering pump body 1, a collection cylinder 11 slidably connected to the metering pump body 1, a pump nozzle assembly 12 mounted on the metering pump body 1, and further comprising:

[0030] The reflux assembly 2 includes a guide rail 21 fixedly connected to one side of the metering pump body 1. A hollow chamber 25 is connected to the guide rail 21 via an inner sliding frame 27. A bellows pipe 28 is fixedly connected to the bottom of the hollow chamber 25 via a vent pipe 211. A sealing cap 26 is threadedly connected to the top of the hollow chamber 25. A connecting rod 3 is fixedly connected to the top of the guide rail 21. A transmission rod 22 is connected to the inner sliding frame 27. A square frame 29 is connected to the transmission rod 22. A transverse rod 210 is fixedly connected to the square frame 29.

[0031] like Figures 1 to 5 As shown, in this utility model, through the reflux assembly 2 and gravity reflux design, after the metering pump completes the distribution, when the operator unscrews the sealing cap 26 on the top of the hollow chamber 25, the sealing cap 26 will rise along the threaded groove on the outer wall of the hollow chamber 25. At the same time, it will squeeze and drive the plate 31 to slide and rise on the connecting rod 3 until the sealing cap 26 separates from the hollow chamber 25. At this time, the vent pipe 211 on the bellows 28 exposes an opening, and the residual solution in the pipeline and nozzle will flow back to the metering pump body 1 under the action of gravity along the bellows 28 and the vent pipe 211, eliminating the crystallization blockage caused by the residual liquid retention and pressure from the root. At the same time, when the operator pulls the hollow chamber 25 outward, the hollow chamber 25 will drive the inner sliding frame 27 to move closer to the two ends of the guide rail 21, thereby making the transmission The moving rod 22 lifts the horizontal rod 210. Since the four pump body nozzle assemblies 12 are synchronously fixed on the horizontal rod 210, after all four sealing caps 26 are unscrewed, the movement of the transmission rod 22 can drive the horizontal rod 210 to slide upward, causing the pump body nozzle assembly 12 to drive one end of the bellows 28 to tilt up, forming a better reflux angle, ensuring more thorough reflux of residual solution, and further reducing the risk of blockage. This design breaks through the limitation of existing joints that are only passively connected, and combines the reflux components such as the hollow chamber 25 and the vent pipe 211 with the pipeline connection function. It not only ensures the sealing of the solution during transportation through the sealing gasket on the inner wall of the sealing cap 26, but also realizes the residual treatment, taking into account the dual functions of transportation sealing and residual treatment, and solving the core pain point of the existing technology.

[0032] Within the pump body and nozzle assembly 12, the pump body is a Cummins ECOFIT5309343 model (integrated plunger-type metering mechanism, G1 / 4 external thread outlet), and the nozzle is a Henghe HA10003702 model axial injection nozzle (304 stainless steel, 0.8mm nozzle diameter). The two are connected by a flexible fluid connection combined with a rigid mechanical fixing composite structure. For fluid transmission, a φ12mm fluororubber bellows 28 (model FB-12-0.5MPa, temperature resistance -40~120℃) is used. As the medium, one end of the bellows 28 is tightened to the pump body outlet via a KC-8T-S type stainless steel compression fitting (double compression seal, compatible with G1 / 4 thread) (PTFE tape is wrapped around the thread and Loctite 567 anaerobic adhesive is applied), and the other end is laser-welded to the nozzle distributor inlet pipe (power 1.5kW, spot size 0.3mm, weld seam with R2mm rounded corner treatment). For mechanical fixation, the pump body is fixed to a Q235B carbon steel bracket with bolts, and the bracket is then connected to the nozzle with bolts to ensure the reliability of high-pressure injection and residual backflow.

[0033] like Figures 2 to 4 As shown, a transverse guide groove is provided on the guide rail 21, and the inner slide frame 27 is slidably connected in the transverse guide groove on the guide rail 21. A first rotating shaft 23 is rotatably connected to the inner slide frame 27, and the transmission rod 22 is rotatably connected to the inner slide frame 27 through the first rotating shaft 23. A second rotating shaft 24 is rotatably connected to the end of the first rotating shaft 23 away from the transmission rod 22. The second rotating shaft 24 is rotatably connected to the square frame 29. In use, by setting two rotating shafts, the first rotating shaft 23 facilitates the rotation between the transmission rod 22 and the inner slide frame 27, and the second rotating shaft 24 facilitates the rotation between the transmission rod 22 and the directional frame. A longitudinal slot is provided on the side of the housing of the metering pump body 1 near the second rotating shaft 24 to limit the square frame 29. When the transmission rod 22 gradually straightens, the directional frame will drive the transverse rod 210 to slide down.

[0034] like Figure 3 as well as Figure 4 As shown, a flat plate 31 is slidably connected to the connecting rod 3, and a round rod is fixedly connected to the bottom of the flat plate 31. The round rod at the bottom of the flat plate 31 is rotatably connected to the sealing cover 26. In use, by placing the flat plate 31 on the connecting rod 3, the flat plate 31 can drive the connecting rod 3 to slide, thereby realizing the transmission of the transmission rod 22.

[0035] like Figures 1 to 3 as well as Figure 5 As shown, a transverse groove for guiding the connecting rod 3 is provided on the top side of the guide rail 21 near the connecting rod 3. In use, by providing a transverse groove for guiding the connecting rod 3 on the top side of the guide rail 21 near the connecting rod 3, the connecting rod 3 is prevented from being blocked and unable to move.

[0036] like Figures 2 to 5As shown, a vertical rod 13 is fixedly connected to the bottom of the pump body nozzle assembly 12, and a collection cylinder 11 is slidably connected to the bottom of the vertical rod 13. In use, the vertical rod 13 is fixedly connected to the bottom of the pump body nozzle assembly 12, and the vertical rod 13 is inserted into the collection cylinder to facilitate the delivery of the solution.

[0037] like Figures 1 to 2 as well as Figure 5 As shown, the pump body nozzle assembly 12 is mounted on the metering pump body 1 via a bellows 28. The pump body nozzle assembly 12 is fixedly connected to the liquid storage tank located at the bottom of the metering pump via the bellows 28. When the metering pump body 1 is started, the solution is delivered to the pump body nozzle assembly 12 via the bellows 28.

[0038] Working principle:

[0039] like Figure 1-5 As shown, the top outer wall of the hollow chamber 25 has a threaded groove for screwing in the sealing cover 26, and a sealing gasket for sealing is fixed at the bottom of the inner wall of the sealing cover 26.

[0040] When in use, after the metering pump body 1 has finished dispensing, the operator prepares protective gear and screws on the sealing cap 26. At this time, the sealing cap 26 will cause the sealing cap 26 to be squeezed and raised, causing the plate 31 to be lifted, causing the plate 31 to slide on the connecting rod 3. The sealing cap 26 separates from the hollow chamber 25. At this time, the vent pipe 211 on the bellows 28 exposes the opening. Under the action of gravity, the solution flows back and re-enters the metering pump body 1.

[0041] Afterwards, the operator pulls the hollow chamber 25 outwards, causing the hollow chamber 25 to move the inner sliding frame 27 closer to the two ends of the guide rail 21. The transmission rod 22 lifts the horizontal rod 210, and the four pump body nozzle assemblies 12 are all simultaneously fixed on a horizontal rod 210. After the four sealing caps 26 are unscrewed, the movement of the transmission rod 22 can drive the horizontal rod 210 to slide upwards, causing the horizontal rod 210 to drive the pump body nozzle assembly 12 to slide upwards, causing the pump body nozzle assembly 12 to drive one end of the bellows 28 to tilt up. At this time, the solution flows back better due to gravity.

[0042] 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 other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A urea solution metering and dispensing device, comprising a metering pump body (1), a collection cylinder (11) slidably connected to the metering pump body (1), and a pump nozzle assembly (12) mounted on the metering pump body (1), characterized in that, Also includes: The reflux assembly (2) includes a guide rail (21) fixedly connected to one side of the metering pump body (1). A hollow chamber (25) is connected to the guide rail (21) via an inner sliding frame (27). A bellows pipe (28) is fixedly connected to the bottom of the hollow chamber (25) via a vent pipe (211). A sealing cap (26) is threadedly connected to the top of the hollow chamber (25). A connecting rod (3) is fixedly connected to the top of the guide rail (21). A transmission rod (22) is connected to the inner sliding frame (27). A square frame (29) is connected to the transmission rod (22). A transverse rod (210) is fixedly connected to the square frame (29).

2. The urea solution metering and dispensing device according to claim 1, characterized in that: A transverse guide groove is provided on the guide rail (21). The inner slide frame (27) is slidably connected in the transverse guide groove on the guide rail (21). A first rotating shaft (23) is rotatably connected to the inner slide frame (27). The transmission rod (22) is rotatably connected to the inner slide frame (27) through the first rotating shaft (23). A second rotating shaft (24) is rotatably connected to the end of the first rotating shaft (23) away from the transmission rod (22). The second rotating shaft (24) is rotatably connected to the square frame (29).

3. The urea solution metering and dispensing device according to claim 1, characterized in that: A plate (31) is slidably connected to the connecting rod (3), and a round rod is fixedly connected to the bottom of the plate (31). The round rod at the bottom of the plate (31) is rotatably connected to the sealing cover (26).

4. The urea solution metering and dispensing device according to claim 1, characterized in that: The top of the guide rail (21) is provided with a transverse groove on the side near the connecting rod (3) to guide the connecting rod (3).

5. The urea solution metering and dispensing device according to claim 1, characterized in that: The bottom of the pump body nozzle assembly (12) is fixedly connected to a vertical rod (13), and the bottom of the vertical rod (13) is slidably connected to a collection cylinder (11).

6. The urea solution metering and dispensing device according to claim 1, characterized in that: The pump body nozzle assembly (12) is mounted on the metering pump body (1) via a bellows (28).

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