Fluid delivery connection interface design

Abstract

A diesel exhaust fluid delivery circuit provides a fluid delivery connector for securely connecting an orifice fitting of a diesel exhaust fluid device to a diesel exhaust fluid hose. The fluid delivery connector includes an attachment nut that is attachable to the orifice fitting of the diesel exhaust fluid device. The fluid delivery connector also includes a hose adapter that includes a fluid conduit and an annular wiper seal coaxially aligned with the fluid conduit. With the attachment nut attached to the orifice fitting, the fluid conduit is slidable over the orifice fitting and is connectable to the attachment nut, and the annular wiper seal wipes off any residue on the orifice fitting as the fluid conduit is slid over the orifice fitting.

Description

[0001] This application is a divisional application of patent application No. 201780024650.1, filed on April 24, 2017, entitled "Design of Fluid Transport Connection Interface". Technical Field

[0002] This disclosure generally relates to selective catalytic reduction (SCR) technology, and more specifically, but not exclusively, to a diesel exhaust fluid delivery circuit including a metering feeder for injecting diesel exhaust fluid into an SCR system. Background Technology

[0003] The purpose of the SCR system is to reduce the amount of nitrogen oxides (NOx) emitted from the engine, which are harmful to the environment. X The content of [NOx]. More specifically, the SCR system is an aftertreatment technology that treats exhaust gases downstream of the engine, by operating a metering feeder to inject a specified amount of diesel exhaust fluid (DEF) into the exhaust gases upstream of the SCR catalyst, which causes the DEF to evaporate and decompose to form ammonia (NH3) and carbon dioxide (CO2). Within the SCR system, it is desirable for NH3 to be used to convert NOx into harmless nitrogen (N2) and water (H2O).

[0004] Existing efforts to bring diesel exhaust fluid delivery circuits into compliance with industry standards, particularly for the high-horsepower generator market, have many shortcomings, limitations, and drawbacks. The unique diesel exhaust fluid delivery circuit disclosed herein remains in high demand. Summary of the Invention

[0005] A unique diesel exhaust fluid (EFF) delivery circuit provides a fluid delivery connector for securely connecting an orifice fitting of an EFF device (e.g., a reservoir, pump, or metering feeder) to an EFF hose. In one embodiment, the fluid delivery connector includes an attachment nut that can be attached to the orifice fitting of the diesel exhaust fluid device. The fluid delivery connector also includes a hose adapter comprising a fluid conduit and an annular scraper seal coaxially aligned with the fluid conduit. With the attachment nut attached to the orifice fitting, the fluid conduit can slide on the orifice fitting and is connected to the attachment nut, and as the fluid conduit slides on the orifice fitting, the annular scraper seal scrapes away any residue on the orifice fitting.

[0006] This overview is provided to introduce some concepts that are further described below in the illustrative embodiments. This overview is not intended to identify key or essential features of the subject matter for which the claimed rights are protected, nor is it intended to serve as an aid in limiting the scope of the subject matter for which the claimed rights are protected. Further embodiments, forms, objectives, features, advantages, aspects, and benefits will become apparent from the following description and figures. Attached Figure Description

[0007] Figure 1A This is a block diagram of the diesel engine exhaust fluid delivery circuit disclosed herein, wherein no fluid flows through the circuit, and Figure 1B This is a block diagram of the diesel engine exhaust fluid delivery circuit disclosed herein, showing the fluid flow through the circuit.

[0008] Figure 2 This is a perspective cross-sectional view of the fluid transport connector disclosed herein.

[0009] Figure 3 This is a cross-sectional view of the annular scraper seal disclosed herein.

[0010] Figure 4 It is installed on the fluid injector Figure 2 A cross-sectional view of the fluid delivery connector in the image. Detailed Implementation

[0011] To aid in understanding the principles of the invention, reference will now be made to the embodiments shown in the drawings, and these embodiments will be described using specialized language. However, it will be understood that this is not intended to limit the scope of the invention, and any changes and further modifications to the illustrated embodiments, as would normally be apparent to those skilled in the art, and any other applications of the principles of the invention as illustrated herein are covered herein.

[0012] See Figure 1A The diagram shows a block diagram of a diesel exhaust fluid delivery circuit 10 of a diesel exhaust fluid device, which includes a storage tank 20, a pump 30, and a metering feeder 40.

[0013] The outlet port 21 of the storage tank 20 is connected to the inlet port 31 of the pump 30 via the fluid delivery connector 23, the hose 50 and the fluid delivery connector 33.

[0014] The outlet port 32 of the pump 30 is connected to the inlet port 41 of the metering feeder 40 via the fluid delivery connector 34, the hose 51 and the fluid delivery connector 43.

[0015] The outlet port 42 of the metering feeder 40 is connected to the inlet port 22 of the storage tank 20 via the fluid delivery connector 44, the hose 52 and the fluid delivery connector 24.

[0016] In such Figure 1B In the fluid operation shown, tank 20 contains diesel exhaust fluid (DEF) 60, which serves as a reactant essential for the functionality of a selective catalytic reduction (SCR) system (not shown). In one embodiment, DEF 60 is a mixed urea aqueous solution containing 32.5% high-purity urea and 67.5% deionized water, whereby urea is a nitrogen compound that converts into nitrogen gas upon heating.

[0017] Orifice fittings and hoses are configured to facilitate protected delivery of the DEF 60 between the reservoir 20, pump 30, and metering feeder 40. In one embodiment, each orifice fitting has a standard male configuration sized to ensure protection of the associated diesel exhaust fluid unit.

[0018] Fluid delivery involves pump 30 drawing DEF 60 from reservoir 20 and applying the drawn DEF 60 at a specified pressure (e.g., 145 psi) to the inlet orifice connector 41 of metering feeder 40 to maintain metering feeder 40 at a cold operating temperature. Metering feeder 40 is controlled to inject a specified amount of DEF 60 into the exhaust catalyst or aftertreatment system (not shown) via injector 45. Any residual DEF 60 remaining in metering feeder 40 after the injection of DEF 60 into the exhaust catalyst is returned to reservoir 20 via metering feeder 40.

[0019] In fact, fluid transfer connectors 23, 24, 33, 34, 43 and 44 must be compatible with DEF 60, provide a robust seal for the orifice connection, and be able to withstand harsh environments, especially for high-horsepower environments.

[0020] See Figure 2 Fluid delivery connectors (e.g., Figure 1A and Figure 1B Implementations of the fluid delivery connectors 23, 24, 33, 34, 43 and 44 include an attachment nut 70 and a hose adapter 80, both of which are made of stainless steel and / or plastic materials.

[0021] The attachment nut 70 includes a slotted clamp 71 and a threaded ring 72.

[0022] The hose adapter 80 includes a fluid conduit formed by a threaded ring 81 and an annular hose interface 82.

[0023] The threaded ring 81 houses the O-ring seal 83 and the scraper seal 84.

[0024] See Figure 3 The scraper seal 84 is an annular ring with an annular flexible groove 85.

[0025] See Figure 4 During assembly, the attachment nut 70 is clamped onto the stop 91 of the male connector 90. The fluid conduit of the hose adapter 80 is then slid onto the male connector 90 and tightened into the attachment nut 70, thereby creating a tight seal between the seals 83 and 84 and the groove 85 of the scraper seal 84, which unfolds to scrape away any residue on the outer surface of the male connector 90, thus contributing to a more robust and longer-lasting seal for the O-ring 83. Subsequently, the hose (e.g., hose 51a as shown) is interlocked to the fluid conduit of the hose adapter 80 via a friction fit on the hose interface 82.

[0026] Return to view Figure 1A and Figure 1B Integrating one or more fluid delivery connectors into the diesel exhaust fluid delivery circuit 10 is highly beneficial for the efficient operation of circuit 10. In practice, the reservoir 20, pump 30, and metering feeder 40 can be separate as shown or integrated as intended. Furthermore, additional devices can be added to circuit 10 if needed.

[0027] As is apparent from the figures and text presented above, various aspects of the invention are contemplated. According to one aspect, a fluid delivery connector includes an attachable nut attachable to an orifice of a diesel exhaust fluid device (e.g., an inlet or outlet of a reservoir, pump, or metering feeder). The fluid delivery connector also includes a hose adapter comprising a fluid conduit and an annular scraper seal coaxially aligned with the fluid conduit. When the attachable nut is attached to the orifice of the diesel exhaust fluid device, the fluid conduit is slidable on the orifice and can be connected to the attachable nut, whereby, as the fluid conduit slides on the orifice, the annular scraper seal scrapes away any residue on the orifice.

[0028] According to a second aspect, a diesel engine exhaust fluid delivery circuit includes a diesel engine exhaust device having an output port connector (e.g., an output port connector for a reservoir, pump, or metering feeder). The circuit also includes a diesel engine exhaust fluid hose and a fluid delivery connector.

[0029] The fluid delivery connector includes an attachment nut that is attached to the output port connector of the diesel exhaust fluid treatment device.

[0030] The fluid delivery connector also includes a hose adapter, which includes a fluid conduit that slides on the output port connector, is connected to the attachment nut, and interlocks with the diesel exhaust fluid hose.

[0031] The hose adapter also includes an annular scraper seal that is coaxially aligned with the fluid conduit to scrape off any residue on the output port connector as the fluid conduit slides across the output port connector.

[0032] According to a third aspect, the diesel exhaust fluid delivery circuit includes a diesel exhaust device having an inlet port connector (e.g., an inlet port connector for a reservoir, pump, or metering feeder). The circuit also includes a diesel exhaust fluid hose and a fluid delivery connector.

[0033] The fluid delivery connector includes an attachment nut that is attached to the inlet port connector of the diesel exhaust fluid device.

[0034] The fluid delivery connector also includes a hose adapter, which includes a fluid conduit that slides on the inlet port connector, is connected to the attachment nut, and interlocks with the diesel exhaust fluid hose.

[0035] The hose adapter also includes an annular scraper seal that is coaxially aligned with the fluid conduit to scrape off any residue on the inlet port connector as the fluid conduit slides over the inlet port connector.

[0036] According to a fourth aspect, a diesel engine exhaust fluid delivery circuit includes a first diesel engine exhaust device with an output port connector and a second diesel engine exhaust device with an input port connector (e.g., a reservoir-pump pairing, a pump-metering feeder pairing, or a metering feeder-reservoir pairing). The circuit also includes a diesel engine exhaust fluid hose and a pair of fluid delivery connectors.

[0037] The first fluid delivery connector includes a first attachment nut, which is attached to the output port connector of the first diesel exhaust fluid device.

[0038] The first fluid delivery connector further includes a first hose adapter, which includes a first fluid conduit that slides on the output port connector, is connected to the first attachment nut, and interlocks with the diesel exhaust fluid hose.

[0039] The first hose adapter further includes a first annular scraper seal, which is coaxially aligned with the first fluid conduit to scrape off any residue on the output port connector as the first fluid conduit slides on the output port connector.

[0040] The second fluid delivery connector includes a second attachment nut, which is attached to the inlet port connector of the first diesel exhaust fluid device.

[0041] The second fluid delivery connector further includes a second hose adapter, which includes a second fluid conduit that slides on the inlet port connector, is connected to the second attachment nut, and interlocks with the diesel exhaust fluid hose.

[0042] The second hose adapter also includes a second annular scraper seal, which is coaxially aligned with the second fluid conduit to scrape off any residue on the inlet port connector as the second fluid conduit slides over the inlet port connector.

[0043] Although the invention has been shown and described in detail in the drawings and foregoing description, the nature of the invention is to be considered illustrative rather than restrictive, and it should be understood that only certain exemplary embodiments have been shown and described. Those skilled in the art will appreciate that many modifications are possible in the exemplary embodiments without substantially departing from the invention. Therefore, all such modifications are intended to be included within the scope of this disclosure as defined in the following claims.

[0044] When reading the claims, it is not intended that the use of words such as “a,” “an,” “at least one,” or “at least one part” should limit the claim to only one article unless explicitly indicated to the contrary in the claim. When the language “at least a part” and / or “part” is used, the article may include a part and / or the entire article unless explicitly indicated to the contrary.

Claims

1. A fluid delivery connector, the fluid delivery connector comprising: A male connector is attached to a diesel engine exhaust fluid device, wherein the diesel engine exhaust fluid device is one of a diesel engine exhaust gas storage tank, a diesel engine exhaust gas pump, and a diesel engine exhaust fluid metering feeder, and the male connector includes a stop. An attachment nut, the attachment nut including a slotted clamp that is clamped onto the stop of the male orifice connector; as well as A hose adapter, positioned within and extending from the attachment nut, includes a fluid conduit and a first and a second seal, each housed within the hose adapter and coaxially aligned with the fluid conduit. The hose adapter includes an annular hose interface opposite the male port for engagement with a treatment fluid hose. The attachment nut includes a threaded ring and is threadedly engaged with the hose adapter.

2. The fluid delivery connector of claim 1, wherein the fluid conduit is interlockable with the fluid hose via the annular hose interface.

3. The fluid delivery connector of claim 1, wherein the first seal of the hose adapter is a scraper seal and the second seal is an O-ring seal.

4. The fluid delivery connector of claim 1, wherein at least one of the attachment nut and the hose adapter is made of stainless steel.

5. The fluid delivery connector of claim 1, wherein each of the attachment nut and the hose adapter is made of stainless steel.

6. A fluid conveying device, the fluid conveying device comprising: A fluid hose and a fluid delivery connector connected to the fluid hose, the fluid delivery connector comprising: A hose adapter, the hose adapter being secured to the fluid hose, the hose adapter including a fluid conduit and an annular hose interface extending axially from one end of the fluid conduit; An attachment nut, positioned around the hose adapter and opposite the fluid hose, the attachment nut also engaging with a male port fitting; A first seal is disposed within the hose adapter, the first seal being configured to sealably engage the male port connector positioned within the hose adapter; and An O-ring seal is housed within the hose adapter, the O-ring seal being configured to sealably engage the male port connector positioned within the hose adapter. The male connector includes a stop extending outward from the male connector, the stop being clamped by the attachment nut, and... The attachment nut includes a threaded ring and a slotted clamp that is clamped onto the stop and threadedly engaged with the hose adapter.

7. The fluid delivery device of claim 6, wherein each of the attachment nut and the hose adapter is made of stainless steel.

8. The fluid delivery device of claim 6, wherein the fluid conduit is interlockable with the fluid hose via the annular hose interface.

9. A fluid conveying device, the fluid conveying device comprising: A fluid hose for diesel engine exhaust fluid and a fluid delivery connector connected to the fluid hose, the fluid delivery connector comprising: A stainless steel hose adapter is fixed to the fluid hose, the hose adapter including a fluid conduit and an annular hose interface extending axially from one end of the fluid conduit; A stainless steel attachment nut positioned around the hose adapter and opposite the fluid hose, the attachment nut also engaging with a male port connector of a fluid device, wherein the fluid device is one of a reservoir, a pump, and a metering feeder for diesel exhaust fluid. A first seal is disposed within the hose adapter, the first seal being configured to sealably engage the male port connector positioned within the hose adapter; and An O-ring seal is housed within the hose adapter, the O-ring seal being configured to sealably engage the male port connector positioned within the hose adapter. The male connector includes a stop extending outward from the male connector, the stop being clamped by the attachment nut, and... The attachment nut includes a threaded ring and a slotted clamp that is clamped onto the stop and threadedly engaged with the hose adapter.

10. The fluid delivery device of claim 9, wherein the fluid conduit is interlockable with the fluid hose via the annular hose interface.

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