High-precision urea delivery pump

Abstract

The invention discloses a high-precision urea delivery pump which comprises a urea delivery pump body, a fixing support is installed at the bottom of the urea delivery pump body, a standing box is arranged in the fixing support, a U-shaped plate is fixedly connected to the surface of the fixing support, a connecting plate is slidably connected into the U-shaped plate, and a water tank is fixedly connected to the connecting plate. A water injection opening is formed in the surface of the water tank, a fixing plate is installed on the lower surface of the water tank in a communicating mode, a permeation plate is fixedly connected to the side, away from the water tank, of the fixing plate, and the permeation plate is attached to heat dissipation fins of a urea conveying pump body. The viscosity of fluid in the pump is kept consistent, and the service life of the delivery pump is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of fluid delivery, and in particular to a high-precision urea delivery pump. Background Art

[0002] In modern industrial production, especially in the selective catalytic reduction (SCR) system in the field of environmental protection, the accurate delivery of urea solution is crucial. The SCR system reduces nitrogen oxides into harmless nitrogen and water by injecting a precise dose of urea solution into the exhaust gas, thereby achieving the purpose of reducing exhaust emissions. However, the existing urea delivery pumps have many problems in practical applications, which affect the delivery accuracy of urea solution.

[0003] The following defects often exist: heat is generated during the use of the urea delivery pump. When the urea delivery pump does not dissipate heat well, the temperature of the components in the pump will rise, causing the viscosity of the medium to change. The viscosity of the urea solution may decrease at high temperatures, causing increased leakage and reduced volumetric efficiency during the delivery process of the pump, shortening the service life of the urea delivery pump; therefore, a high-precision urea delivery pump is proposed to address the above problems. Summary of the invention

[0004] The present application provides a high-precision urea delivery pump, which is used to solve the problem of poor heat dissipation during use of the urea delivery pump in the prior art.

[0005] The present application provides a high-precision urea delivery pump, comprising a urea delivery pump body, a fixed bracket being installed at the bottom of the urea delivery pump body, a stationary box being arranged in the fixed bracket, a U-shaped plate being fixedly connected to the surface of the fixed bracket, a connecting plate being slidably connected in the U-shaped plate, a water tank being fixedly connected to the connecting plate, a water injection port being provided on the surface of the water tank, a fixed plate being connected and installed on the lower surface of the water tank, a permeation plate being fixedly connected to a side of the fixed plate away from the water tank, and the permeation plate being fitted with the heat dissipation fins of the urea delivery pump body.

[0006] Furthermore, a guide rail is provided on the surface of the connecting plate, an L-shaped plate is fixedly connected to the side wall of the U-shaped plate, a sliding rod is slidably inserted in the L-shaped plate, a roller is installed at the inner end of the sliding rod, and a pull plate is fixedly connected to the outer end, the arc surface of the sliding rod is slidably connected to the U-shaped plate, and the roller is rollingly matched with the guide rail on the connecting plate.

[0007] Furthermore, the arc surface of the sliding rod is sleeved with a spring, and two ends of the spring are respectively fixedly connected to the pulling plate and the L-shaped plate.

[0008] Furthermore, a limiting rod is slidably inserted in the L-shaped plate, and a limiting groove is provided on the arc surface of the sliding rod. The size of the limiting rod is matched with the size of the sliding rod limiting groove.

[0009] Furthermore, a water cavity is provided in the fixed plate, a plurality of guide blocks are installed on the arc surface of the permeation plate, a water hole connected to the water cavity is provided on the permeation plate and the guide block, a water outlet is provided on the inner side wall of the guide block, the size of the guide block is matched with the size of the cooling fins on the urea delivery pump body, and a cleaning cotton is provided on the inner wall of the guide block.

[0010] Furthermore, a blocking block and a blocking spring are provided on the guide block, one end of the blocking spring is in contact with the inner bottom wall of the guide block, and the other end of the blocking spring is connected to the blocking block, and the blocking spring can make the blocking block block or avoid the water outlet by telescoping; A cylindrical groove is provided on the heat dissipation fin of the urea delivery pump body, and an expansion body is arranged in the cylindrical groove. The expansion body can expand under heat and squeeze the blocking spring.

[0011] Furthermore, the expansion body comprises a flexible shell and an expansion core material, and the expansion core material is expanded graphite or thermoplastic elastomer.

[0012] Furthermore, the side wall of the static box is connected to a water pipe, a water pump is installed at the water inlet end of the water pipe, and the water pipe is connected to the water tank.

[0013] Furthermore, a filter plate is arranged above the static box, a support pad is installed on the lower surface of the fixed bracket, and the surface of the support pad is provided with anti-slip corrugations.

[0014] Furthermore, the water injection port is movably connected with a sealing plug, and the sealing plug fits tightly with the water injection port.

[0015] The present invention has the following beneficial effects: The high-precision urea delivery pump described in the present invention can achieve the effect of heat dissipation for the urea delivery pump body through the design of the water tank, the fixed plate and the permeation plate during specific operation. Water is injected into the water tank through the water injection port, and the water flows to the permeation plate through the fixed plate. The permeation plate fits with the heat dissipation fins of the urea delivery pump body, and can transfer the heat generated by the operation of the urea delivery pump body to the water on the permeation plate. The heat is taken away by evaporation of water or heat conduction, thereby avoiding the influence of overheating on the performance and precision of the urea delivery pump body and extending its service life. At the same time, through the combination of the U-shaped plate, the connecting plate, the guide rail, the L-shaped plate and the sliding rod, the position of the water tank and the permeation plate can be adjusted. The sliding rod slides in the guide rails of the U-shaped plate and the connecting plate, and the relative positions of the water tank, the permeation plate and the urea delivery pump body can be adjusted according to actual needs to meet the heat dissipation requirements under different working conditions, thereby improving the versatility and practicality of the device.

[0016] By arranging an expansion body on the heat dissipation fins of the urea delivery pump body, and arranging a blocking block and a spring on the guide block, when the urea delivery pump body generates more heat during operation, the expansion body expands due to the heat and presses the spring upward, and the spring contracts to drive the blocking block to move upward to avoid the water outlet, so that water can smoothly flow to the heat dissipation fins of the urea delivery pump body. The water flows in the heat dissipation fins and takes away the heat of the urea delivery pump body in time, which is conducive to maintaining the urea delivery pump body at a suitable temperature without affecting the viscosity of the medium in the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 Side view of Figure 3 It is a schematic diagram of the structure of the water tank 6 in the present invention; Figure 4 For the present invention Figure 3 A magnified image of point A; Figure 5 It is a schematic structural diagram of the blocking block, blocking spring and expansion body of the present invention.

[0019] Reference numerals: Among them, 1 is the urea delivery pump body, 2 is the fixed bracket, 3 is the static box, 4 is the U-shaped plate, 5 is the connecting plate, 6 is the water tank, 7 is the water inlet, 8 is the fixed plate, 9 is the permeation plate, 10 is the L-shaped plate, 11 is the sliding rod, 12 is the pulling plate, 13 is the water pipe, 14 is the filter plate, 15 is the guide block, 16 is the spring, 17 is the limit rod, 18 is the support pad, 19 is the sealing plug, 20 is the water cavity, 21 is the water hole, 22 is the blocking block, 23 is the blocking spring, and 24 is the expansion body. DETAILED DESCRIPTION

[0020] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the embodiment of the present application provides a high-precision urea delivery pump, a fixed bracket 2 is installed at the bottom of the urea delivery pump body 1, a static box 3 is arranged on the surface of the fixed bracket 2, a U-shaped plate 4 is fixedly connected to the surface of the fixed bracket 2, a connecting plate 5 is slidably connected inside the U-shaped plate 4, a water tank 6 is fixedly connected to the connecting plate 5, a water injection port 7 is provided on the surface of the water tank 6, a fixed plate 8 is installed below the water tank 6, a permeation plate 9 is fixedly connected to the side of the fixed plate 8 away from the water tank 6, and the permeation plate 9 is fitted with the heat dissipation fins on the urea delivery pump body 1. A driver, such as a motor or an electric push rod, is installed on the U-shaped plate, and the output end of the driver is fixedly connected to the outer wall of the water tank, so that the driver can drive the water tank, the fixed plate and the permeation plate to move along the length direction of the heat dissipation fins of the urea delivery pump body 1, so that the water in the water tank flows to the heat dissipation fins of the urea delivery pump body 1, and the urea delivery pump body is cooled.

[0022] Specifically, a guide rail is provided on the surface of the connecting plate 5, an L-shaped plate 10 is fixedly connected to the side wall of the U-shaped plate 4, a sliding rod 11 is slidably inserted in the L-shaped plate 10, a roller is installed at the inner end of the sliding rod 11, and a pull plate 12 is fixedly connected to the outer end, and a spring is sleeved on the arc surface of the sliding rod, and the two ends of the spring are respectively fixedly connected to the pull plate and the L-shaped plate, so that the roller and the guide rail on the connecting plate 5 are rollingly matched. By setting the spring 16, the effect of automatically ejecting the sliding rod 11 into the guide rail of the connecting plate 5 is achieved, and at the same time, the loss of the sliding rod 11 is avoided, thereby improving the practicality of the device. Therefore, in the process of adjusting the relative positions of the water tank 6, the permeation plate 9 and the urea delivery pump body 1, the movement resistance can be reduced to adapt to the heat dissipation requirements under different working conditions, thereby improving the versatility and practicality of the device.

[0023] A limiting rod 17 is slidably inserted in the L-shaped plate 10, and a limiting groove is provided on the arc surface of the sliding rod 11. The size of the limiting rod 17 is matched with the size of the upper limit groove of the sliding rod 11, so as to achieve the effect of limiting the stretched sliding rod 11, which is convenient for the staff to water-cool and clean the heat dissipation fins of the urea delivery pump body 1, thereby improving the practicability of the device.

[0024] In some embodiments, the fixed plate and the permeable plate are arc-shaped plates respectively adapted to the urea delivery pump body 1, a water cavity 20 is provided in the fixed plate, a plurality of guide blocks 15 are installed on the arc surface of the permeable plate, a water hole 21 communicating with the water cavity 20 is provided on the permeable plate 9 and the guide block 15, a water outlet is provided on the inner wall of the guide block, the size of the guide block 15 is adapted to the size of the heat dissipation fin on the urea delivery pump body 1, and a cleaning cotton is provided on the inner wall of the guide block 15. In this way, the water in the water tank passes through the water cavity 20 and the water hole 21 in sequence to reach the water outlet and flow onto the cleaning cotton. When the guide block 15 moves along the length direction of the urea delivery pump body 1, the water on the cleaning cotton further flows onto the heat dissipation fin of the urea delivery pump body, and the heat dissipation fin of the urea delivery pump body can be cleaned while cooling down, thereby improving the heat dissipation effect. By setting the cleaning cotton, the effect of cleaning while cooling the cooling fins of the urea delivery pump body 1 is achieved, avoiding the situation where a large amount of dust adheres to the surface of the cooling fins of the urea delivery pump body 1 and the water cooling cannot achieve the expected effect, thereby improving the practicality of the device.

[0025] In some embodiments, a blocking block 22 and a blocking spring 23 are provided on the guide block 15, one end of the blocking spring 23 abuts against the inner bottom wall of the guide block 15, and the other end of the blocking spring 23 is connected to the blocking block 22, and the blocking spring 13 can make the blocking block 22 block or avoid the water outlet by telescoping; a cylindrical groove is provided on the heat dissipation fin of the urea delivery pump body 1, and an expansion body 24 is provided in the cylindrical groove, and the expansion body 24 can expand under heat and squeeze the blocking spring 23. The expansion body 24 includes a flexible shell and an expansion core material, and the expansion core material is expanded graphite or a thermoplastic elastomer. Specifically, the expansion core material is expanded graphite, which is a loose and porous worm-like substance obtained by intercalation, washing, drying, and high-temperature expansion of natural graphite flakes. When the temperature is higher than 35°C, the expanded graphite begins to expand, changing from flake to worm-like, and the volume gradually increases and the flexible shell gradually expands. The higher the temperature, the larger the expansion volume of the expanded graphite. The expanded expanded graphite squeezes the blocking block 22 upward, so that the blocking spring 23 shrinks and moves the blocking block upward, so that the water outlet is opened. When the temperature returns to below 35°, the volume of the expanded graphite gradually returns to its original state, and the expanded graphite after returning to its original state no longer squeezes the blocking block, so that the water outlet is closed. In this way, the high-temperature position of the urea delivery pump body can be accurately cooled, so that the temperature of different positions of the urea delivery pump body is basically consistent, and the viscosity of the medium at different positions in the pump is ensured to be consistent.

[0026] The side wall of the still box 3 is connected to a water pipe 13, a filter plate 14 is arranged above the still box 3, a water pump is installed at the water inlet end of the water pipe 13, the water pipe 13 is connected to the water tank 6, and the water pipe 13 is a corrugated pipe. By arranging the still box 3 and the water pipe 13, when the cooling fins of the urea delivery pump body 1 are cooled, excess water will drip into the still box 3 along the urea delivery pump body 1, and then the water pump is started to inject the water in the still box 3 into the water tank 6, thereby achieving a recycling effect.

[0027] Six support pads 18 are installed on the lower surface of the fixed bracket 2. The surface of the support pads 18 is provided with anti-skid corrugations. By providing the support pads 18, the anti-skid and shock-absorbing effect of the fixed bracket 2 is achieved, thereby improving the practicality of the device.

[0028] The water inlet 7 is movably connected with a sealing plug 19, which fits tightly against the water inlet 7. By providing the sealing plug 19, the water tank 6 is sealed, and other impurities are prevented from entering the water tank 6, thereby improving the practicability of the device.

[0029] The working process of the present invention is: Step 1, pull out the sealing plug 19 from the water injection port 7, and inject water into the water tank 6 through the water injection port 7. The water in the water tank 6 flows into the permeation plate 9 through the fixed plate 8, and then flows into the water outlet of the guide block. The guide block fits with the heat dissipation fins of the urea delivery pump body 1, which can transfer the heat generated by the operation of the urea delivery pump body 1 to the water, and use the evaporation of water or heat conduction to take away the heat, thereby avoiding the performance and accuracy of the urea delivery pump body 1 being affected by overheating and extending its service life.

[0030] Step 2: Through the combination of U-shaped plate 4, connecting plate 5, guide rail, L-shaped plate 10 and sliding rod 11, the position of water tank 6 and permeation plate 9 can be adjusted. The sliding rod 11 slides in the guide rail of U-shaped plate 4 and connecting plate 5. During the operation of the pump, the relative position of water tank 6 and permeation plate 9 and urea delivery pump body 1 is adjusted by the driver to circulate heat at different positions of urea delivery pump body 1, thereby improving the versatility and practicality of the device. When the heat generated by the operation of urea delivery pump body is large, the expansion body expands due to heat and squeezes the blocking spring 23 upward. The blocking spring 23 shrinks and drives the blocking block 22 to move upward to avoid the water outlet, so that water can flow smoothly to the heat dissipation fins of urea delivery pump body. The water flows in the heat dissipation fins and takes away the heat of urea delivery pump body in time; when the temperature of urea delivery pump body is restored, the volume of expanded graphite gradually returns to the original state, and the expanded graphite after returning to the original state no longer squeezes the blocking block 22, thereby closing the water outlet. In this way, the high-temperature position of the urea delivery pump body can be accurately cooled, so that the temperature of different positions of the urea delivery pump body remains basically consistent, ensuring that the viscosity of the medium at different positions in the pump remains consistent.

[0031] Step three, by setting up a static box 3 and a water pipe 13, when cooling the heat dissipation fins of the urea delivery pump body 1, excess water will drip into the static box 3 along the urea delivery pump body 1, and then the water pump is started to inject the water in the static box 3 into the water tank 6, achieving the effect of recycling.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0036] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A high-precision urea delivery pump, characterized in that: The invention comprises a urea delivery pump body (1), wherein a fixing bracket (2) is installed at the bottom of the urea delivery pump body (1), a stationary box (3) is arranged in the fixing bracket (2), a U-shaped plate (4) is fixedly connected to the surface of the fixing bracket (2), a connecting plate (5) is slidably connected to the inside of the U-shaped plate (4), the connecting plate (5) is fixedly connected to a water tank (6), a water injection port (7) is provided on the surface of the water tank (6), a fixing plate (8) is installed in communication with the lower surface of the water tank (6), a permeation plate (9) is fixedly connected to the side of the fixing plate (8) away from the water tank (6), and the permeation plate (9) is fitted with a heat dissipation fin on the urea delivery pump body (1).

2. The high-precision urea delivery pump according to claim 1, characterized in that: A guide rail is provided on the surface of the connecting plate (5); an L-shaped plate (10) is fixedly connected to the side wall of the U-shaped plate (4); a sliding rod (11) is slidably inserted into the L-shaped plate (10); a roller is installed at the inner end of the sliding rod (11); a pull plate (12) is fixedly connected to the outer end; the roller is in rolling cooperation with the guide rail on the connecting plate (5).

3. The high-precision urea delivery pump according to claim 2, characterized in that: The arc surface of the sliding rod (11) is sleeved with a spring (16), and two ends of the spring (16) are respectively fixedly connected to the pull plate (12) and the L-shaped plate (10).

4. The high-precision urea delivery pump according to claim 3, characterized in that: A limiting rod (17) is slidably inserted in the L-shaped plate (10), a limiting groove is provided on the arc surface of the sliding rod (11), and the size of the limiting rod (17) matches the size of the upper limit groove of the sliding rod (11).

5. The high-precision urea delivery pump according to claim 1, characterized in that: A water cavity is provided in the fixed plate, a plurality of guide blocks (15) are mounted on the arc surface of the permeable plate (9), a water hole communicating with the water cavity is provided on the permeable plate and the guide block, a water outlet is provided on the inner side wall of the guide block, the size of the guide block (15) is adapted to the size of the heat dissipation fin on the urea delivery pump body (1), and a cleaning cotton is provided on the inner wall of the guide block.

6. The high-precision urea delivery pump according to claim 5, characterized in that: The guide block (15) is provided with a blocking block and a blocking spring, one end of the blocking spring abuts against the inner bottom wall of the guide block, the other end of the blocking spring is connected to the blocking block, and the blocking spring can cause the blocking block to block or avoid the water outlet by extending and retracting; A cylindrical groove is provided on the heat dissipation fin of the urea delivery pump body (1), and an expansion body is arranged in the cylindrical groove. The expansion body can expand under heat and squeeze the blocking spring.

7. The high-precision urea delivery pump according to claim 6, characterized in that: The expansion body comprises a flexible shell and an expansion core material, and the expansion core material is expanded graphite or thermoplastic elastomer.

8. The high-precision urea delivery pump according to claim 1, characterized in that: The side wall of the static box (3) is connected to a water pipe (13), a water pump is installed at the water inlet end of the water pipe (13), and the water pipe (13) is connected to the water tank (6).

9. The high-precision urea delivery pump according to claim 1, characterized in that: A filter plate (14) is arranged above the static box (3), a support pad (18) is installed on the lower surface of the fixed bracket (2), and the surface of the support pad (18) is provided with anti-slip corrugations.

10. The high-precision urea delivery pump according to claim 1, characterized in that: A sealing plug (19) is movably connected to the water injection port (7), and the sealing plug (19) is tightly fitted to the water injection port (7).

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