CN203939676U - A kind of diaphragm pump - Google Patents
A kind of diaphragm pump Download PDFInfo
- Publication number
- CN203939676U CN203939676U CN201420358218.XU CN201420358218U CN203939676U CN 203939676 U CN203939676 U CN 203939676U CN 201420358218 U CN201420358218 U CN 201420358218U CN 203939676 U CN203939676 U CN 203939676U
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- China
- Prior art keywords
- valve
- valve seat
- check valve
- sheet
- gap
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- Expired - Fee Related
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- 230000004888 barrier function Effects 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 20
- 230000033001 locomotion Effects 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
A kind of diaphragm pump, comprises the pump housing, clutch shaft bearing, motor, camshaft, the second bearing, connecting rod, barrier film, valve seat, the first check valve sheet, the second check valve sheet, multiple seal ring, valve gap; Motor is fixed on the pump housing by clutch shaft bearing, between motor and camshaft by screw be fixedly connected with, motor rotarily drives camshaft rotation, the second bearing is fixed on camshaft, and connecting rod is fixed on the second bearing, and the mode that barrier film is threaded connection is fixed on connecting rod; This diaphragm pump structure can increase substantially the sealing of diaphragm pump, improves working pressure simultaneously.
Description
Technical field
The utility model belongs to a kind of diaphragm pump, is specially the diaphragm pump in a kind of urea pump that is applied to diesel engine exhaust system.
Background technique
Nowadays, be applied to the diaphragm pump of urea pump of diesel engine exhaust system often because sealing is bad, cause diaphragm pump to occur in the course of the work urea liquid to be extracted in urea pump in urea tank; In addition, also there is the problem that working pressure is low and can not meet actual demand.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model has been optimized diaphragm pump structure, increases substantially the sealing of diaphragm pump pump, has reduced dry pump failure rate; Working pressure can reach 10bar simultaneously.
The technical solution of the utility model is: a kind of diaphragm pump, comprises the pump housing, clutch shaft bearing, motor, camshaft, the second bearing, connecting rod, barrier film, valve seat, the first check valve sheet, the second check valve sheet, multiple seal ring, valve gap; Motor is fixed on the pump housing by clutch shaft bearing, between motor and camshaft by screw be fixedly connected with, motor rotarily drives camshaft rotation, the second bearing is fixed on camshaft, and connecting rod is fixed on the second bearing, and the mode that barrier film is threaded connection is fixed on connecting rod; It is characterized in that: barrier film and valve seat form pump chamber jointly, valve gap is positioned on valve seat, and valve gap and valve seat are equipped with an inlet channel and an outlet flow; The first check valve sheet is located at can be blocked the inlet channel of valve gap completely, can not block valve seat completely in the time that the first check valve sheet contacts with valve seat inlet channel between the inlet channel of valve gap and the inlet channel of valve seat and in the time that the first check valve sheet contacts with valve gap; The second check valve sheet is located between the outlet flow of valve gap and the outlet flow of valve seat and in the time that the second check valve sheet contacts with valve gap, can not blocks the outlet flow of valve gap completely, can block the outlet flow of valve seat in the time that the second check valve sheet contacts with valve seat completely; The first check valve sheet, the second check valve sheet and barrier film are equipped with independently seal ring.
Preferably, two check valve sheet are all between valve gap and valve seat; In the time that described barrier film moves to described valve seat direction, the first check valve sheet and described valve gap form import one-way valve, prevent that gas or liquid are back to the inlet channel of valve gap from pump chamber; When described barrier film is when away from the motion of described valve seat direction, the second check valve sheet forms and exports one-way valve with described valve seat, prevents that gas or liquid are back to pump chamber by the outlet flow of valve gap.
Preferably, on valve gap, there is a ring-shaped step, to improve the sealing between valve gap and the first check valve sheet; On described valve seat, there is a ring-shaped step, to improve the sealing between valve seat and the second check valve sheet; Described two check valve sheet boundary dimension are identical with thickness, and are arranged symmetrically with.
Preferably, have a groove on the pump housing, have an aperture on described valve seat, the hole on groove and valve seat on the pump housing communicates with the inlet channel on valve gap, can be by the liquids recovery that is leaked to the groove place on the pump housing because pump chamber pressure is excessive to pump chamber; On groove on the pump housing and valve seat, the cross-section area of aperture can be less than the cross-section area of valve gap upper inlet runner.
Preferably, have a protruding step on valve gap, have a recessed step on described valve seat, two steps are assembled together, for helping to produce the location of assembling.
Preferably, on the pump housing, there are four embedded nuts; When assembling, four bolts, by the through hole on described valve gap and valve seat, are tightened on these four nuts.
Brief description of the drawings
Fig. 1 plan view of the present utility model;
Fig. 2,3,4 and 5 is portion of the present utility model views, analyses and observe position as shown in Figure 1;
Fig. 6 is the partial enlarged view of sectional drawing 3 of the present utility model;
Fig. 7 is the worm's eye view of valve gap of the present utility model;
Fig. 8 is the plan view of valve gap of the present utility model;
Fig. 9 is the sectional view of valve gap of the present utility model;
Figure 10 is the worm's eye view of valve seat of the present utility model;
Figure 11 is the plan view of valve seat of the present utility model;
Figure 12 is the sectional view of valve seat of the present utility model;
Figure 13 is the part plan view of the pump housing of the present utility model.
1-motor; 2-clutch shaft bearing; 3-the second bearing; 4-connecting rod; 5-barrier film; 6-valve seat; 7-the second check valve sheet; 8-the first check valve sheet; 9-valve gap; 10-pad; 11-bolt; 12-seal ring; 13-seal ring; 14-pump chamber; 15-seal ring; The 16-pump housing; 17-camshaft; 18-screw; 19-embedded nut.
Embodiment
For making the technical solution of the utility model clearer, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, diaphragm pump of the present utility model mainly comprises motor 1, camshaft 17, clutch shaft bearing 2, the second bearing 3, connecting rod 4, barrier film 5, the pump housing 16, valve seat 6, the second check valve sheet 7, the first check valve sheet 8, seal ring 12, seal ring 13, seal ring 15 and valve gap 9.
Motor 1 is fixed on the pump housing 16 by clutch shaft bearing 2; Between motor 1 and camshaft 17, be connected with screw 18.Connecting rod 4 is fixed on camshaft 17 by the second bearing 3.Barrier film 5 is fixed on connecting rod 4 by screw thread.Barrier film 5 and valve seat 6 form a pump chamber 14.Valve seat 6 be positioned at the pump housing 16 above, valve gap 9 be positioned at valve seat 6 above.The first check valve sheet 8 and the second check valve sheet 7 are between valve seat 6 and valve gap 9.
As shown in Figures 3 and 4, on valve gap 9, there are inlet channel 9b and outlet flow 9c; As shown in FIG. 11 and 12, on valve seat, there are inlet channel 6b and outlet flow 6c; Inlet channel 9b, inlet channel 6b, outlet flow 9c, outlet flow 6c and pump chamber 14 communicate.There is the outer seal ring 13 that is with of the first check valve sheet 8, the first check valve sheet 8 at inlet channel 9b place, prevents pressure excessive overflow diaphragm pump outside of liquid because of the first check valve sheet 8 places; There is the outer seal ring 12 that is with of the second check valve sheet 7, the second check valve sheet 7 at outlet flow 9c place, prevents pressure excessive overflow of liquid because of the second check valve sheet 7 places; The outer seal ring 15 that is with of barrier film 5, prevents that liquid from overflowing because the pressure in pump chamber is excessive.
As shown in Figure 9, on valve gap 9, there is ring-shaped step 9e.As shown in figure 12, on valve seat 6, there is ring-shaped step 6e.In the time that barrier film 5 moves to valve seat 6 directions, the volume of pump chamber 14 dwindles, pressure in pump chamber 14 increases, the first check valve sheet 8 is to valve gap 9 direction motions, be pressed on ring-shaped step 9e, thereby block inlet channel 9b, prevent gas or flow direction inlet channel 9b in pump chamber 14, at this moment the first check valve sheet 8 forms import one-way valve 20 with valve gap 9; When barrier film 5 is to away from 6 directions whens motion of valve seat, the volume of pump chamber 14 increases, pressure in pump chamber 14 reduces, the second check valve sheet 7 is to valve seat 6 direction motions, be pressed on ring-shaped step 6e, thereby block outlet flow 6c, prevent that gas or the liquid in outlet flow 9c from flowing to pump chamber 14, at this moment the second check valve sheet 7 forms outlet one-way valve 21 with valve seat 6.
The boundary dimension of two check valve sheet is identical with thickness, and is symmetrically arranged between valve gap 9 and valve seat 6.
As shown in Figure 3, on valve seat 6, there is an aperture 6a, on valve gap, have an aperture 9a.As shown in Fig. 6 and 13, on the pump housing 16, there is a groove 16a.Hole 9a and inlet channel 9b, hole 6a and groove 16a communicate.When the liquid in pump chamber 14 is leaked to groove 16a place because pressure is excessive, the liquid at groove 16a place will flow back to pump chamber 14 through via hole 6a, 9a and inlet channel 9b, prevents that liquid is leaked to diaphragm pump outside.The cross-section area of groove 16a, hole 6a, hole 9a can be less than the cross-section area of inlet channel 9b.
As shown in FIG. 7 and 8, on valve gap, there is a protruding step 9d.As shown in FIG. 10 and 11, have a recessed step 6d on valve seat, step 9d and 6d are assembled together, for helping to produce the location of assembling.
As shown in Figure 5, on the pump housing 16, there are four embedded nuts 19; When assembling, four bolts 11 are by the through holes on pad 10, valve gap 9 and valve seat 6, are tightened on these four nuts 19.
This novel practical work process is described below: in the time that motor 1 rotates, motor 1 drives camshaft 17 to rotate, and camshaft 17 drives the second bearing 3 and connecting rod 4 to-and-fro motion, connecting rod 4 drives barrier film 5 to-and-fro motion, in the time that barrier film 5 moves to valve seat 6 directions, pressure in pump chamber 14 increases, the first check valve sheet 8 is to valve gap 9 direction motions, and be pressed on ring-shaped step 9e, prevent that gas in pump chamber or liquid from flowing to the inlet channel 9b of valve gap through the inlet channel 6b of valve seat 6, simultaneously, the second check valve sheet 7 is to valve gap 9 direction motions, but the second check valve sheet 7 can not be blocked the outlet flow 9c of valve gap 9 completely, so the gas in pump chamber 14 or liquid flow to the outlet flow 9c of valve gap 9 through the outlet flow 6c on valve seat, Here it is diaphragm pump is by the process outside the gas in pump chamber or liquid excavationg pump, when barrier film 5 is to away from 6 directions whens motion of valve seat, pressure in pump chamber 14 reduces, the second check valve sheet 7 is to valve seat 6 direction motions, and be pressed on ring-shaped step 6e, prevent that gas or liquid in outlet flow 9c from flowing to pump chamber 14 through the outlet flow 6c of valve seat 6, simultaneously, the first check valve sheet 8 is to valve seat 6 direction motions, but the first check valve sheet 8 can not be blocked the inlet channel 6b of valve seat 6 completely, so the gas in inlet channel 9b or liquid can be drawn in pump chamber 14 through the inlet channel 6b on valve seat 6, Here it is, and the gas outside pump or liquid are extracted into the process in pump chamber by diaphragm pump.
To sum up, the utility model encyclopaedizes by the above embodiments.But the utility model is not intended to be defined in above-described embodiment.In the situation that not departing from spirit and scope of the present utility model, diaphragm pump of the present utility model can have many different distortion.For example can change the concrete structure of the embedded nut of the pump housing, or add the bearing of a fixed electrical machinery axle at motor shaft end, or by valve gap and valve seat for the concrete step of assembling and positioning by the square circular arc that makes into, or adopt in above-mentioned technological means 2 kinds or 3 kinds etc. situation not enumerate simultaneously.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent embodiment's quality.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a diaphragm pump, comprises the pump housing, clutch shaft bearing, motor, camshaft, the second bearing, connecting rod, barrier film, valve seat, the first check valve sheet, the second check valve sheet, multiple seal ring, valve gap; Motor is fixed on the pump housing by clutch shaft bearing, between motor and camshaft by screw be fixedly connected with, motor rotarily drives camshaft rotation, the second bearing is fixed on camshaft, and connecting rod is fixed on the second bearing, and the mode that barrier film is threaded connection is fixed on connecting rod; It is characterized in that: barrier film and valve seat form pump chamber jointly, valve gap is positioned on valve seat, and valve gap and valve seat are equipped with an inlet channel and an outlet flow; The first check valve sheet is located at can be blocked the inlet channel of valve gap completely, can not block valve seat completely in the time that the first check valve sheet contacts with valve seat inlet channel between the inlet channel of valve gap and the inlet channel of valve seat and in the time that the first check valve sheet contacts with valve gap; The second check valve sheet is located between the outlet flow of valve gap and the outlet flow of valve seat and in the time that the second check valve sheet contacts with valve gap, can not blocks the outlet flow of valve gap completely, can block the outlet flow of valve seat in the time that the second check valve sheet contacts with valve seat completely; The first check valve sheet, the second check valve sheet and barrier film are equipped with independently seal ring.
2. a kind of diaphragm pump as claimed in claim 1, is characterized in that: in the time that described barrier film moves to described valve seat direction, the first check valve sheet and described valve gap form import one-way valve, prevent that gas or liquid are back to the inlet channel of valve gap from pump chamber; When described barrier film is when away from the motion of described valve seat direction, the second check valve sheet forms with described valve seat and exports one-way valve, prevents that gas or liquid are back to pump chamber by the outlet flow of valve gap.
3. a kind of diaphragm pump as claimed in claim 2, is characterized in that: on described valve gap, have a ring-shaped step, to improve the sealing between valve gap and the first check valve sheet; On described valve seat, there is a ring-shaped step, to improve the sealing between valve seat and the second check valve sheet; Described first, second check valve sheet boundary dimension is identical with thickness.
4. a kind of diaphragm pump as claimed in claim 1, it is characterized in that: on the described pump housing, have a groove, on described valve seat, there is an aperture, hole on groove and valve seat on the pump housing communicates with the inlet channel on valve gap, can be by the liquids recovery that is leaked to the groove place on the pump housing because pump chamber pressure is excessive to pump chamber; On groove on the pump housing and valve seat, the cross-section area of aperture is less than the cross-section area of valve gap upper inlet runner.
5. a kind of diaphragm pump as claimed in claim 1, is characterized in that: on described valve gap, have a protruding step, have a recessed step on described valve seat, two steps are assembled together, for assembling time location.
6. a kind of diaphragm pump as claimed in claim 1, is characterized in that: on the described pump housing, have four embedded nuts; When assembling, by four bolts by the through hole on described valve gap and valve seat, be tightened on four nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420358218.XU CN203939676U (en) | 2014-07-01 | 2014-07-01 | A kind of diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420358218.XU CN203939676U (en) | 2014-07-01 | 2014-07-01 | A kind of diaphragm pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203939676U true CN203939676U (en) | 2014-11-12 |
Family
ID=51858992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420358218.XU Expired - Fee Related CN203939676U (en) | 2014-07-01 | 2014-07-01 | A kind of diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203939676U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791228A (en) * | 2015-03-10 | 2015-07-22 | 李新华 | Diaphragm pump |
| CN107965446A (en) * | 2018-01-03 | 2018-04-27 | 昆山华亿丰涂装设备科技有限公司 | A kind of three ball diaphragm pumps |
| CN108119323A (en) * | 2018-02-06 | 2018-06-05 | 安徽仁智电子科技有限公司 | Plunger type metering pump |
| CN110972486A (en) * | 2018-09-30 | 2020-04-07 | 深圳市大疆软件科技有限公司 | Diaphragm pump and agricultural unmanned aerial vehicle |
| CN114810562A (en) * | 2022-05-10 | 2022-07-29 | 浙江永球科技有限公司 | Diaphragm type vacuum pump |
-
2014
- 2014-07-01 CN CN201420358218.XU patent/CN203939676U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791228A (en) * | 2015-03-10 | 2015-07-22 | 李新华 | Diaphragm pump |
| CN104791228B (en) * | 2015-03-10 | 2017-11-14 | 李新华 | A kind of membrane pump |
| CN107965446A (en) * | 2018-01-03 | 2018-04-27 | 昆山华亿丰涂装设备科技有限公司 | A kind of three ball diaphragm pumps |
| CN108119323A (en) * | 2018-02-06 | 2018-06-05 | 安徽仁智电子科技有限公司 | Plunger type metering pump |
| CN110972486A (en) * | 2018-09-30 | 2020-04-07 | 深圳市大疆软件科技有限公司 | Diaphragm pump and agricultural unmanned aerial vehicle |
| CN114810562A (en) * | 2022-05-10 | 2022-07-29 | 浙江永球科技有限公司 | Diaphragm type vacuum pump |
| CN114810562B (en) * | 2022-05-10 | 2024-02-27 | 浙江永球科技有限公司 | Diaphragm vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180119 Address after: Room 8422, room No. 3, No. 3, Xijing Road, Badachu high tech park, Shijingshan District, Beijing Patentee after: Tak Rongzhi (Beijing) Environmental Protection Technology Research Institute Address before: No. 2, building 1712, Fengtai District, Beijing, Beijing Patentee before: Chen Qingdong |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20200701 |