CN220337058U - Urea pump check valve assembly - Google Patents
Urea pump check valve assembly Download PDFInfo
- Publication number
- CN220337058U CN220337058U CN202320935801.1U CN202320935801U CN220337058U CN 220337058 U CN220337058 U CN 220337058U CN 202320935801 U CN202320935801 U CN 202320935801U CN 220337058 U CN220337058 U CN 220337058U
- Authority
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- China
- Prior art keywords
- valve
- valve body
- liquid
- valve cover
- liquid outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000004202 carbamide Substances 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 103
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000003365 glass fiber Substances 0.000 claims description 6
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 3
- 239000004954 Polyphthalamide Substances 0.000 claims description 3
- 229920006375 polyphtalamide Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
- Exhaust Gas After Treatment (AREA)
- Check Valves (AREA)
Abstract
The utility model relates to the technical field of urea pump related equipment, in particular to a one-way valve assembly of a urea pump, which comprises a valve body and a valve cover, wherein a liquid inlet cavity is connected with a plurality of valve cover liquid inlet channels formed in the valve cover and a plurality of valve body liquid inlet channels formed in the valve body, a liquid outlet cavity is connected with a plurality of valve cover liquid outlet channels formed in the valve cover and a plurality of valve body liquid outlet channels formed in the valve body, a first diaphragm is arranged in the liquid inlet cavity, a second diaphragm is arranged in the liquid outlet cavity, a liquid inlet connected with the valve cover liquid inlet channels and a liquid outlet connected with the valve cover liquid outlet channels are formed in the end face of the valve cover, a second sealing ring which is sealed by taking the liquid outlet as a center and a third sealing ring which is sealed by taking the liquid inlet as a center are embedded in the end face of the valve cover, and a fourth sealing ring and the first sealing ring are embedded in the joint face of the valve cover. The utility model can greatly improve the tightness of the one-way valve assembly and ensure the working pressure of the urea pump during working.
Description
Technical Field
The utility model relates to the technical field of urea pump related equipment, in particular to a urea pump one-way valve assembly.
Background
As is well known, with increasing emphasis on the environment, most of today's diesel vehicles adopt SCR technology to reduce pollution of the diesel vehicles to the atmosphere, and urea pump plays a very critical role as a core part in the SCR device. The urea pump check valve component is a core part of the urea pump and plays a vital role in reliability and fatigue resistance of the urea pump.
Today, a diaphragm pump of a urea pump applied to an exhaust system of a diesel engine often has poor sealing performance, so that the diaphragm pump cannot pump urea solution from a urea tank to the urea pump in the working process; in addition, there is a problem that the pressure is low during operation, and the actual requirement cannot be met.
Disclosure of Invention
The utility model aims to solve the defects, and provides the urea pump one-way valve assembly, which can greatly improve the tightness of the one-way valve assembly and reduce the failure rate of a dry pump.
In order to overcome the defects in the background art, the technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a urea pump check valve subassembly, includes valve body and valve gap, valve body and valve gap can dismantle the connection, the faying surface between valve body and the valve gap sets up feed liquor cavity and goes out the liquid chamber, the feed liquor cavity is connected with a plurality of valve gap feed liquor passageway that set up on the valve gap, is connected with a plurality of valve body feed liquor passageway that set up on the valve body, go out the liquid chamber and be connected with a plurality of valve body play liquid passageway that set up on the valve gap, thereby be equipped with in the feed liquor cavity and block up the first diaphragm of valve gap feed liquor passageway and restrict urea solution and reversely flow into valve gap feed liquor passageway, thereby be equipped with in the play liquid cavity and block up the second diaphragm of valve body play liquid passageway and restrict urea solution and reversely flow into valve body play liquid passageway;
the end face of the valve cover is provided with a liquid inlet connected with the liquid inlet channel of the valve cover and a liquid outlet connected with the liquid outlet channel of the valve cover, and the end face of the valve cover is embedded with a second sealing ring which is sealed by taking the liquid outlet as the center and a third sealing ring which is sealed by taking the liquid inlet as the center;
the joint surface of the valve cover is embedded with a fourth sealing ring which is sealed by taking the liquid inlet chamber as the center and a first sealing ring which is sealed by taking the liquid outlet chamber as the center.
Further improvement comprises that the end face of the valve body is provided with an inwardly concave spherical surface.
Further improvements include that both the valve cover and the valve body are made of nylon-66 glass fiber or polyphthalamide resin glass fiber.
The valve body is provided with a first step, the first step is positioned in the liquid inlet cavity, the second step is positioned in the liquid outlet cavity, and the second step is positioned on the valve body and around the liquid outlet channel of the valve body.
Further improvement comprises that a plurality of locating pins arranged on the joint surface of the valve body are respectively embedded into locating holes formed on the joint surface of the valve cover.
The beneficial effects of the utility model are as follows: the device adopts the liquid inlet and outlet structure, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring, improves the tightness of the one-way valve assembly, ensures that the required working pressure is reached when the urea pump works, and can reach 30bar; the sealing performance can be further improved by the aid of the first step and the second step; the locating pin and the locating hole are matched and connected, so that the valve body and the valve cover can be assembled and disassembled conveniently.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a front view of the present utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view of C-C of FIG. 1;
FIG. 5 is a rear view of the present utility model;
FIG. 6 is an isometric view of the utility model;
FIG. 7 is a front view of the valve cover of the present utility model;
FIG. 8 is an isometric view of a valve cover of the present utility model;
FIG. 9 is an isometric view of the valve body of the present utility model;
FIG. 10 is a front view of the valve body of the present utility model;
in the figure, the valve body is 1-, the first sealing ring is 2-, the valve cover is 3-, the second sealing ring is 4-, the liquid outlet is 5-, the liquid outlet channel of the valve cover is 6-, the third sealing ring is 7-, the liquid inlet is 8-, the liquid inlet channel of the valve cover is 9-, the first step is 10-, the fourth sealing ring is 11-, the liquid inlet chamber is 12-, the first membrane is 13-, the liquid inlet channel of the valve body is 14-, the second step is 15-, the second membrane is 16-, the liquid outlet channel of the valve body is 17-, the liquid outlet chamber is 18-, the locating pin is 19-, the locating hole is 20-and the spherical surface is 21-.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. Embodiments of the utility model are described herein in terms of various specific embodiments, including those that are apparent to those of ordinary skill in the art and all that come within the scope of the utility model.
According to the one-way valve assembly of the urea pump shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, the one-way valve assembly comprises a valve body 1 and a valve cover 3, wherein the valve body 1 and the valve cover 3 are detachably connected, a liquid inlet chamber 12 and a liquid outlet chamber 18 are arranged on an abutting surface between the valve body 1 and the valve cover 3, the liquid inlet chamber 12 is connected with a plurality of valve cover liquid inlet channels 9 arranged on the valve cover 3 and a plurality of valve body liquid inlet channels 14 arranged on the valve body 1, the liquid outlet chamber 18 is connected with a plurality of valve cover liquid outlet channels 6 arranged on the valve cover 3 and a plurality of valve body liquid outlet channels 17 arranged on the valve body 1, a first diaphragm 13 for blocking the liquid inlet channels 9 is arranged in the liquid inlet chamber 12 so as to limit urea solution from reversely flowing into the valve cover liquid inlet channels 9, and a second diaphragm 16 for blocking the valve body liquid outlet channels 17 is arranged in the liquid outlet chamber 18 so as to limit urea solution from reversely flowing into the valve body liquid outlet channels 17;
the end face of the valve cover 3 is provided with a liquid inlet 8 connected with a valve cover liquid inlet channel 9 and a liquid outlet 5 connected with a valve cover liquid outlet channel 6, the end face of the valve cover 3 is embedded with a second sealing ring 4 taking the liquid outlet 5 as the center and a third sealing ring 7 taking the liquid inlet 8 as the center for sealing, the second sealing ring 4 and the third sealing ring 7 are fixed on the valve cover 3 in a production process mode of hot vulcanization bonding, and falling of the second sealing ring 4 and the third sealing ring 7 is effectively avoided;
the fourth sealing ring 11 which is used for sealing by taking the liquid inlet chamber 12 as the center and the first sealing ring 2 which is used for sealing by taking the liquid outlet chamber 18 as the center are embedded on the joint surface of the valve cover 3.
By adopting the mode of the liquid inlet and outlet structure and the first sealing ring 2, the second sealing ring 4, the third sealing ring 7 and the fourth sealing ring 11, the tightness of the one-way valve assembly is improved, the failure rate of the dry pump is reduced, the required working pressure is ensured to be reached when the urea pump works, and the working pressure can be up to 30bar.
According to the illustration shown in fig. 2, the end surface of the valve body 1 is provided with an inwardly concave spherical surface 21, the spherical surface 21 below the valve body 1 and the up-and-down moving diaphragm form a pump cavity with a volume capable of being reduced or increased, when the volume of the pump cavity is increased, negative pressure is generated in the pump cavity, the second diaphragm 16 completely blocks the valve body liquid outlet channel 17 of the valve body 1 to form an outlet one-way valve, and gas or liquid is prevented from flowing back to the pump cavity from the valve cover liquid outlet channel 6 through the valve body liquid outlet channel 17;
when the volume of the pump cavity is reduced, the pressure in the pump is increased, the first diaphragm 13 completely blocks the valve cover liquid inlet channel 9, and an inlet one-way valve is formed to prevent gas or liquid from flowing back from the pump cavity to the valve cover liquid inlet channel 9.
The valve cover 3 and the valve body 1 are made of nylon-66 glass fiber or polyphthalamide resin glass fiber.
According to fig. 2, a first step 10 is arranged on the valve cover 3 around the valve cover liquid inlet channel 9, the first step 10 is positioned in the liquid inlet chamber 12, the arranged first step 10 further improves the tightness between the valve cover 3 and the first diaphragm 13, a second step 15 is arranged on the valve body 1 around the valve body liquid outlet channel 17, the second step 15 is positioned in the liquid outlet chamber 18, and the arranged second step 15 further improves the tightness between the valve body 1 and the second diaphragm 16.
According to fig. 4, a plurality of positioning pins 19 arranged on the joint surface of the valve body 1 are respectively embedded into positioning holes 20 formed on the joint surface of the valve cover 3, which is beneficial to the disassembly and the assembly of the valve body 1 and the valve cover 3.
Working principle: when the urea pump check valve assembly is used, when urea pumps urea aqueous solution, the volume of a pump cavity is increased, the pressure in the pump cavity is reduced, negative pressure is generated, a second diaphragm 16 moves towards the valve body 1 and presses against a second step 15, gas or liquid in a valve cover liquid outlet channel 6 is prevented from flowing to the pump cavity, meanwhile, a first diaphragm 13 moves towards the valve body 1, and the gas or liquid in a valve cover liquid inlet channel 9 is sucked into the pump cavity, so that the liquid suction function of the pump cavity is realized;
when the volume in the pump cavity is reduced and the pressure in the pump cavity is increased, the first diaphragm 13 presses on the second step 10 of the valve cover 3 to prevent gas or liquid from flowing from the pump cavity to the valve cover liquid inlet channel 9, and meanwhile the second diaphragm 16 moves to the valve cover 3, and the gas or liquid in the pump cavity flows to the valve cover liquid outlet channel 32 through the valve body liquid outlet channel 11 to realize the liquid discharging function of the pump cavity.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (5)
1. The utility model provides a urea pump check valve subassembly, includes valve body (1) and valve gap (3), valve body (1) and valve gap (3) can dismantle the connection, laminating face between valve body (1) and valve gap (3) sets up feed liquor cavity (12) and play liquid cavity (18), characterized in that, feed liquor cavity (12) are connected with a plurality of valve gap feed liquor passageway (9) of seting up on valve gap (3), are connected with a plurality of valve body feed liquor passageway (14) of seting up on valve body (1), play liquid cavity (18) are connected with a plurality of valve gap play liquid passageway (6) of seting up on valve gap (3), are connected with a plurality of valve body play liquid passageway (17) of seting up on valve body (1), thereby be equipped with in feed liquor cavity (12) and block up first diaphragm (13) of valve gap feed liquor passageway (9) and restrict the reverse inflow of urea solution in valve gap feed liquor passageway (9), thereby be equipped with in play liquid cavity (18) and block up second diaphragm (16) of valve body play liquid passageway (17) and restrict the reverse inflow of urea solution in valve gap (17);
a liquid inlet (8) connected with a liquid inlet channel (9) of the valve cover and a liquid outlet (5) connected with a liquid outlet channel (6) of the valve cover are formed in the end face of the valve cover (3), and a second sealing ring (4) for sealing by taking the liquid outlet (5) as the center and a third sealing ring (7) for sealing by taking the liquid inlet (8) as the center are embedded in the end face of the valve cover (3);
a fourth sealing ring (11) for sealing by taking the liquid inlet chamber (12) as the center and a first sealing ring (2) for sealing by taking the liquid outlet chamber (18) as the center are embedded on the joint surface of the valve cover (3).
2. A urea pump check valve assembly as set forth in claim 1, wherein: an inward concave spherical surface (21) is formed on the end surface of the valve body (1).
3. A urea pump check valve assembly as set forth in claim 1, wherein: the valve cover (3) and the valve body (1) are made of nylon-66 glass fiber or polyphthalamide resin glass fiber.
4. A urea pump check valve assembly as set forth in claim 1, wherein: the valve cover is characterized in that a first step (10) is arranged on the valve cover (3) around the valve cover liquid inlet channel (9) as the center, the first step (10) is positioned in the liquid inlet chamber (12), a second step (15) is arranged on the valve body (1) around the valve body liquid outlet channel (17) as the center, and the second step (15) is positioned in the liquid outlet chamber (18).
5. A urea pump check valve assembly as set forth in claim 1, wherein: a plurality of positioning pins (19) arranged on the joint surface of the valve body (1) are respectively embedded into positioning holes (20) formed on the joint surface of the valve cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320935801.1U CN220337058U (en) | 2023-04-24 | 2023-04-24 | Urea pump check valve assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320935801.1U CN220337058U (en) | 2023-04-24 | 2023-04-24 | Urea pump check valve assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220337058U true CN220337058U (en) | 2024-01-12 |
Family
ID=89445826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320935801.1U Active CN220337058U (en) | 2023-04-24 | 2023-04-24 | Urea pump check valve assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220337058U (en) |
-
2023
- 2023-04-24 CN CN202320935801.1U patent/CN220337058U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |