A vehicle urea solution dispensing device

Abstract

This utility model belongs to the field of urea solution dispensing technology, specifically a vehicle urea solution dispensing device, including a mounting base and a storage tank fixed on its top surface, and further including: a metering cylinder, the bottom end of which is connected to a two-way connector two via a filling pipe, the two-way connector two being connected to a filling nozzle, and a one-way valve installed on each filling pipe; a three-way connector one, which is connected to the storage tank via a discharge pipe and to an inlet pipe, the inlet pipe being connected to the bottom end of the metering cylinder, and a one-way valve installed on each inlet pipe; a piston, which is set inside the metering cylinder, and the piston is connected to a lifting plate via a connecting assembly, the lifting plate being connected via a transmission mechanism, and the transmission mechanism driving the two lifting plates to move in opposite directions; this utility model achieves parallel operation of "one suction and one discharge" through two metering cylinders, improving dispensing efficiency and continuity; at the same time, during liquid suction, only the solution is allowed to flow into the metering cylinder, and during liquid discharge, only the solution is allowed to flow out, avoiding backflow or crosstalk, and ensuring accurate and consistent dispensing volume each time.

Description

Technical Field

[0001] This utility model belongs to the field of urea solution dispensing technology, and more specifically, it relates to a vehicle urea solution dispensing device. Background Technology

[0002] As a core consumable of selective catalytic reduction technology in diesel vehicle exhaust treatment systems, automotive urea solution needs to be quantitatively packaged through a packaging device during its transportation and sales.

[0003] Currently, existing dispensing devices typically employ a single-cylinder design. During the filling process, each cylinder must complete the entire "liquid suction-dispensing" process before repeating the action to start the next cycle. This prevents the suction and filling operations from overlapping, resulting in a long cycle time and a limited number of dispensing operations per unit time. Consequently, the overall filling efficiency is low, making it difficult to achieve continuous operation and meet the production needs of large-scale, high-precision dispensing.

[0004] To address the aforementioned issues, this application proposes a vehicle urea solution dispensing device. Utility Model Content

[0005] The purpose of this invention is to provide a vehicle urea solution dispensing device, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a vehicle urea solution dispensing device, comprising a mounting base and a storage tank fixed to its top surface, and further comprising:

[0008] Two metering cylinders are connected at their bottom ends to two filling tubes respectively. Both filling tubes are connected to the interface of the second tee connector. The second tee connector is connected to the filling nozzle. Each filling tube is equipped with a one-way valve.

[0009] One of the three-way connectors has one port connected to the storage tank through the discharge pipe, and the other two ports of the three-way connector are respectively connected to two feed pipes. The two feed pipes are respectively connected to the bottom of the metering cylinder, and each feed pipe is equipped with a one-way valve.

[0010] Two pistons are respectively installed in two metering cylinders. The two pistons are respectively connected to two lifting plates through connecting components. The two lifting plates are connected through a transmission mechanism, and the transmission mechanism drives the two lifting plates to move in opposite directions.

[0011] Furthermore, the transmission mechanism includes a screw threadedly connected to the lifting plate, and a driven gear is provided above the top of the screw. The driven gear is fixedly connected to the screw via a connecting shaft. The driven gear meshes with the driving gear, and the driving gear is fixedly connected to the output end of the motor.

[0012] Furthermore, a fixed box is provided between the two metering cylinders, the lifting plate and the screw are both located inside the fixed box, and the screw is rotatably connected to the fixed box. The driven gear and the driving gear are located above the fixed box.

[0013] Furthermore, a guide rod is fixed inside the fixed box, and the guide rod is slidably connected to the lifting plate.

[0014] Furthermore, the connecting assembly includes a piston rod fixedly connected to the top of the piston, and the piston rod passes through the top of the metering cylinder. The piston rod is fixedly connected to a sliding rod via a connecting arm. The sliding rod passes through the top of the fixed box, and the lower side wall of the sliding rod is fixedly connected to the lifting plate.

[0015] Furthermore, one side of the top surface of the mounting base is fixedly connected to the connecting plate via a support plate, and the connecting plate is fixedly connected to the fixed box via a fixing plate. The connecting plate is fixedly connected to the fixing plate via a fixing rod, and the fixing plate is fixedly connected to the outer wall of the metering cylinder.

[0016] Furthermore, an outer protective shell is fixed to the top of the fixed box, and both the driven gear and the driving gear are disposed inside the outer protective shell, while the motor is fixed to the top of the outer protective shell.

[0017] Furthermore, the outer wall of the piston is fixed with a rubber pad that is interference-fitted with the inner wall of the metering cylinder.

[0018] This utility model has the following beneficial effects:

[0019] This invention uses two metering cylinders and two pistons linked together to enable the two metering cylinders to alternately perform feeding and discharging operations. When one metering cylinder draws solution from the storage tank, the other metering cylinder can simultaneously discharge solution to the filling nozzle, thereby greatly reducing the waiting time in traditional single-cylinder operation and effectively improving the overall efficiency and continuity of the dispensing operation.

[0020] This invention employs one-way valves on both the feed pipe and the filling pipe, which, in conjunction with the piston movement, strictly control the flow direction of the urea solution. This effectively prevents solution backflow or crosstalk, ensuring that each metering cylinder can independently and accurately complete quantitative liquid intake and discharge, thereby guaranteeing high consistency and metering reliability of each unit of dispensed product.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the metering cylinder structure of this utility model;

[0025] Figure 3 This is a partial structural schematic diagram of the present invention;

[0026] Figure 4 This is a cross-sectional view of the metering cylinder of this utility model;

[0027] Figure 5 This is a cross-sectional view of the fixing box of this utility model;

[0028] Figure 6 This is a schematic diagram of the mounting base structure of this utility model;

[0029] The attached diagram lists the components represented by each number as follows:

[0030] In the diagram: 1. Mounting base; 101. Support plate; 102. Connecting plate; 103. Fixing rod; 104. Fixing plate; 2. Storage tank; 201. Discharge pipe; 202. T-connector one; 203. Feed pipe; 3. Metering cylinder; 301. Filling pipe; 302. T-connector two; 4. Filling nozzle; 5. Piston; 501. Piston rod; 502. Connecting arm; 503. Sliding rod; 504. Rubber pad; 6. Lifting plate; 601. Screw; 602. Guide rod; 7. Fixing box; 8. Driven gear; 801. Connecting shaft; 9. Drive gear; 10. Motor; 11. Outer casing. Detailed Implementation

[0031] 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.

[0032] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Please see Figure 1 - Figure 6 As shown, this utility model is a vehicle urea solution dispensing device, including a mounting base 1 and a storage tank 2 fixed on its top surface, and further including: two metering cylinders 3, the bottom ends of which are respectively connected to two filling tubes 301, both filling tubes 301 are connected to the interface of a two-way connector 302, the two-way connector 302 is connected to a filling nozzle 4, and a one-way valve is installed on each filling tube 301; a three-way connector 202, one interface of which is connected to the storage tank 2 through a discharge pipe 201, and the other two interfaces of the three-way connector 202 are respectively connected to two feed pipes 203, the two feed pipes 203 are respectively connected to the bottom end of the metering cylinder 3, and a one-way valve is installed on each feed pipe 203; two pistons 5, respectively disposed in the two metering cylinders 3, the two pistons 5 are respectively connected to two lifting plates 6 through connecting components, the two lifting plates 6 are connected through a transmission mechanism, and the transmission mechanism drives the two lifting plates 6 to move in opposite directions;

[0034] This embodiment provides a vehicle urea solution dispensing device. The metering cylinders 3 are symmetrically distributed on the left and right. A one-way valve installed on the filling pipe 301 ensures that the solution flows into the filling pipe 301 in a directional manner. A one-way valve installed on the feed pipe 203 ensures that the solution flows into the metering cylinder 3 in a directional manner from the mounting base 1. When the piston 5 moves upward, it draws the solution into the metering cylinder 3. When the piston 5 moves downward, the solution is discharged from the metering cylinder 3 into the filling pipe 301. Through the transmission structure, the piston 5 moves up and down synchronously in opposite directions, so that the two metering cylinders 3 alternately perform suction and discharge, thereby realizing continuous filling.

[0035] The transmission mechanism includes a screw 601 threadedly connected to the lifting plate 6, and a driven gear 8 is provided above the top of the screw 601. The driven gear 8 is fixedly connected to the screw 601 through a connecting shaft 801. The driven gear 8 meshes with the driving gear 9, and the driving gear 9 is fixedly connected to the output end of the motor 10. There are two screws 601 with opposite thread directions. There are two driven gears 8 located on both sides of the driving gear 9. The motor 10 drives the driving gear 9 to rotate, which in turn drives the two driven gears 8 to rotate synchronously, thereby driving the two lifting plates 6 to rotate synchronously through the connecting shaft 801.

[0036] A fixed box 7 is provided between the two metering cylinders 3. The lifting plate 6 and the screw 601 are both set inside the fixed box 7, and the screw 601 is rotatably connected to the fixed box 7. The driven gear 8 and the driving gear 9 are set above the fixed box 7. The screw 601 is set perpendicular to the horizontal plane. The connecting shaft 801 passes through the top of the fixed box 7 and is fixedly connected to the screw 601. The fixed box 7 can also isolate the screw 601 from the outside world and block external dust.

[0037] The fixed box 7 is equipped with a guide rod 602, which is slidably connected to the lifting plate 6. The guide rod 602 is set parallel to the screw 601, which restricts the lifting plate 6 to move only along the axis of the screw 601, so as to avoid deflection caused by the rotation of the screw 601 and ensure smooth movement.

[0038] The connecting assembly includes a piston rod 501 fixedly connected to the top of the piston 5, and the piston rod 501 passes through the top of the metering cylinder 3. The piston rod 501 is fixedly connected to a sliding rod 503 through a connecting arm 502. The sliding rod 503 passes through the top of the fixed box 7, and the lower side wall of the sliding rod 503 is fixedly connected to the lifting plate 6. The piston rod 501 is slidably connected to the metering cylinder 3. When the lifting plate 6 moves, it drives the sliding rod 503 to move synchronously, and further drives the piston rod 501 to move through the connecting arm 502, thereby realizing the synchronous movement of the piston 5 and the lifting plate 6.

[0039] The mounting base 1 is fixed to the connecting plate 102 on one side of its top surface via a support plate 101, and the connecting plate 102 is fixed to the fixed box 7 via a fixing plate 104. The connecting plate 102 is fixed to the fixing plate 104 via a fixing rod 103, and the fixing plate 104 is fixed to the outer wall of the metering cylinder 3.

[0040] The top of the fixed box 7 is fixed with an outer protective shell 11. The driven gear 8 and the driving gear 9 are both set inside the outer protective shell 11. The motor 10 is fixed at the top of the outer protective shell 11. The outer protective shell 11 can prevent dust from affecting the transmission effect of the driven gear 8 and the driving gear 9, and also provide a mounting position for the motor 10.

[0041] Among them, the outer wall of the piston 5 is fixed with a rubber pad 504 that is interference-fitted with the inner wall of the metering cylinder 3 to fill the tiny gap between the piston 5 and the metering cylinder 3 and prevent urea solution leakage.

[0042] It is understandable that this utility model achieves parallel operation of "one suction and one discharge" through two quantitative cylinders 3, which improves the efficiency and continuity of dispensing; at the same time, when suctioning, only the solution is allowed to flow into the quantitative cylinder, and when dispensing, only the solution is allowed to flow out, avoiding backflow or crosstalk, and ensuring that the dispensing amount is accurate and consistent each time.

[0043] A specific application of the operation process in this embodiment is as follows: Initial state: the left piston 5 is located at the bottom of the metering cylinder 3 (dispensing completed state), and the right piston 5 is located at the top of the metering cylinder 3 (liquid aspiration completed state).

[0044] Phase 1 (Left side dispensing + Right side liquid aspiration): Start motor 10 rotates forward, drive gear 9 drives driven gear 8 to rotate, drive two lifting plates 6 to move in opposite directions through two screws 601 with opposite screw threads, right piston 5 moves down with right lifting plate 6, urea solution in right metering cylinder 3 is forced into filling pipe 301, injected into the container to be dispensed through three-way connector 2 302 and filling nozzle 4 (right side filling completed), left piston 5 moves up with left lifting plate 6, negative pressure is formed in left metering cylinder 3, urea solution in storage tank 2 enters right metering cylinder 3 through discharge pipe 201, three-way connector 1 202 and inlet pipe 203 (right side liquid aspiration completed).

[0045] Second stage (right side dispensing + left side liquid aspiration): Start motor 10 reverses, driving the two screws 601 to rotate through drive gear 9 and driven gear 8. Left piston 5 descends with left lifting plate 6, squeezing out urea solution from left metering cylinder 3 for dispensing. Right piston 5 rises with right lifting plate 6, creating negative pressure in right metering cylinder 3 for liquid aspiration.

[0046] The motor 10 continuously rotates in both directions, driving the two pistons 5 to alternately complete the "dispensing-liquid suction" action, thereby achieving continuous and efficient dispensing of urea solution.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vehicle urea solution dispensing device, comprising a mounting base (1) and a storage tank (2) fixed to its top surface, characterized in that, Also includes: Two metering cylinders (3) are connected at their bottom ends to two filling tubes (301), and both filling tubes (301) are connected to the interface of a three-way connector (302). The three-way connector (302) is connected to the filling nozzle (4), and a one-way valve is installed on each filling tube (301). The first three-way connector (202) has one port connected to the storage tank (2) through the discharge pipe (201), and the other two ports of the first three-way connector (202) are connected to two feed pipes (203) respectively. The two feed pipes (203) are connected to the bottom end of the metering cylinder (3) respectively. Each feed pipe (203) is equipped with a one-way valve. Two pistons (5) are respectively set in two metering cylinders (3). The two pistons (5) are respectively connected to two lifting plates (6) through connecting components. The two lifting plates (6) are connected through a transmission mechanism, and the transmission mechanism drives the two lifting plates (6) to move in opposite directions.

2. The vehicle urea solution dispensing device according to claim 1, characterized in that: The transmission mechanism includes a screw (601) threadedly connected to the lifting plate (6), and a driven gear (8) is provided above the top of the screw (601). The driven gear (8) is fixedly connected to the screw (601) through a connecting shaft (801). The driven gear (8) meshes with the driving gear (9), and the driving gear (9) is fixedly connected to the output end of the motor (10).

3. The vehicle urea solution dispensing device according to claim 2, characterized in that: A fixed box (7) is provided between the two quantitative cylinders (3). The lifting plate (6) and the screw (601) are both located in the fixed box (7), and the screw (601) is rotatably connected to the fixed box (7). The driven gear (8) and the driving gear (9) are located above the fixed box (7).

4. The vehicle urea solution dispensing device according to claim 3, characterized in that: The fixed box (7) is equipped with a guide rod (602), and the guide rod (602) is slidably connected to the lifting plate (6).

5. The vehicle urea solution dispensing device according to claim 3, characterized in that: The connecting assembly includes a piston rod (501) fixed to the top of the piston (5), and the piston rod (501) passes through the top of the metering cylinder (3). The piston rod (501) is fixed to a sliding rod (503) via a connecting arm (502). The sliding rod (503) passes through the top of the fixed box (7), and the lower side wall of the sliding rod (503) is fixed to the lifting plate (6).

6. The vehicle urea solution dispensing device according to claim 3, characterized in that: The top surface of the mounting base (1) is fixed to the connecting plate (102) via a support plate (101), and the connecting plate (102) is fixed to the fixed box (7) via a fixing plate (104). The connecting plate (102) is fixed to the fixing plate (104) via a fixing rod (103), and the fixing plate (104) is fixed to the outer wall of the metering cylinder (3).

7. The vehicle urea solution dispensing device according to claim 3, characterized in that: The top of the fixed box (7) is fixed with an outer protective shell (11), the driven gear (8) and the driving gear (9) are both set inside the outer protective shell (11), and the motor (10) is fixed at the top of the outer protective shell (11).

8. The vehicle urea solution dispensing device according to claim 1, characterized in that: The outer wall of the piston (5) is fixed with a rubber pad (504) that is interference-fitted with the inner wall of the metering cylinder (3).

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