CN203549011U - Diaphragm type constant pressure check valve - Google Patents
Diaphragm type constant pressure check valve Download PDFInfo
- Publication number
- CN203549011U CN203549011U CN201320669488.8U CN201320669488U CN203549011U CN 203549011 U CN203549011 U CN 203549011U CN 201320669488 U CN201320669488 U CN 201320669488U CN 203549011 U CN203549011 U CN 203549011U
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- Prior art keywords
- diaphragm
- valve
- pressure
- type constant
- check valve
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 claims description 19
- 239000004589 rubber sealant Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The utility model discloses a diaphragm type constant pressure check valve, and belongs to a valve structure applied to the technical field of water supply and drainage. The diaphragm type constant pressure check valve is composed of a valve body, a valve clack, a diaphragm positioning device, a valve cover and the like. The diaphragm type constant pressure check valve is mainly characterized in that an adjusting bolt, an adjusting nut, a spring seat and a pressure adjusting spring and other parts capable of adjusting the pressure of a diaphragm are additionally arranged on the top of the valve cover, and a threaded rod, a pointer, an observation window, pressure grade identification and other parts capable of allowing users to observe the current pressure state of the valve in real time are additionally arranged in the valve cover. Consequently, the valve can be opened under constant pressure through the improved structure, the pressure can be quickly adjusted through a pressure indicating device, the valve can meet the non-return requirements on some special occasions, and meanwhile the check valve further has the advantages of being simple in structure, low in manufacturing cost, good in performance and the like.
Description
Technical field
The utility model relates to the check valve structure in a kind of pipeline valve, refers in particular to diaphragm type constant-pressure check valve.
Background technique
Safety check is the one in many pipeline valves, and it is widely used in controlling the one-way flow of liquid medium in pipeline.In drainage system, the tubular structural design of the general employing of conventional check valves, is installed on pump outlet place conventionally, to prevent that water stream from flowing backwards and causing the harm to water pump, rely on medium itself to flow and automatically open, have cracking pressure little, open and close the features such as sensitive.But, the safety check of some special occasions need to be under the pressure of setting could Open valve, when the pressure of inlet passage valve closing during lower than this setting valve pressure, this function often traditional safety check lacks.Disclosed China Patent No. is 02223479.9 " micro-resistance except hammer safety check ", and it has disclosed a kind of diaphragm type structure that adopts and has carried out the valve mechanism that flap location opens and closes, and this structure also can be used during lower than this setting valve pressure at the pressure of inlet passage.But, in actual using process, also find, the safety check of this diaphragm type fixed pressing structure, its pressure condition all cannot be adjusted, and cannot obtain the pressure condition when early gate by observation.
Summary of the invention
Technical problem to be solved in the utility model be to overcome the defect of prior art and provide a kind of can adjust diaphragm pressure and indication current valve pressure situation diaphragm type constant-pressure check valve.
Technical problem of the present utility model is achieved through the following technical solutions:
A kind of diaphragm type constant-pressure check valve, comprises valve body, flap, diaphragm positioning device and valve gap; In described valve body, be provided with valve pocket, in this valve pocket, be provided with sealing inclined-plane; Described flap sealing contact is on sealing inclined-plane, and this flap upper end and valve body are articulated and connected; Described diaphragm positioning device comprises that sealing is arranged on the diaphragm seat at valve body top and is fixed on the diaphragm between diaphragm seat and valve gap, this diaphragm will be separated into mutual disconnected epicoele and cavity of resorption between valve gap and diaphragm seat, and in diaphragm seat, is also provided with the connecting passage that is communicated with respectively cavity of resorption and valve pocket; Described diaphragm positioning device also comprises a positioning rod, this positioning rod upper end is fixed on diaphragm through top board and press table, lower end holds out against on flap through diaphragm seat, described valve gap top is provided with adjusts bolt and adjusting nut, this adjustment bolt lower end is connected with spring seat through valve gap, and between spring seat and top board, is provided with the pressure adjusting spring of mutual pushing tow.
In described valve gap, be provided with pressure-indication means, this pressure-indication means comprises screw rod and is arranged on the pointer on screw rod, screw rod lower end is fixed on top board, and described valve gap one side is provided with viewing window, and the pressure rating sign corresponding with described pointer is installed in this viewing window.
Between described positioning rod and diaphragm seat, be provided with the axle sleeve that sealing is installed.
The described flap back side is provided with the positioning step holding out against for described positioning rod.
Described flap is wrapped with rubber sealant.
Described valve body two ends are provided with flange plate, and valve body end face is made as the middle flanged surface of installing for described diaphragm seat.
Compared with prior art, the utility model is mainly at valve gap top, to have additional the parts such as adjustment bolt, adjusting nut, spring seat and the pressure adjusting spring of capable of regulating diaphragm pressure, also in valve gap, have additional the parts such as screw rod, pointer, viewing window and pressure rating sign that can the current valve pressure situation of Real Time Observation, therefore the structure after improving can realize the function of valve constant pressure turn on, and can rapid adjustment pressure by pressure-indication means, make valve be adapted to the non-return needs of some special occasions.
Accompanying drawing explanation
Fig. 1 is the utility model sectional structure schematic diagram.
Embodiment
To the utility model embodiment, elaborate again by above-mentioned accompanying drawing below.
As shown in Figure 1,1. valve body, 2. flap, 3. positioning rod, 4. packing ring, 5. axle sleeve, 6. diaphragm seat, 7. press table, 8. diaphragm, 9. top board, 10. screw rod, 11. pointers, 12. viewing windows, 13. pressure rating signs, 14. valve gaps, 15. adjusting nuts, 16. are adjusted bolts, 17. spring seats, 18. pressure adjusting springs, 19. hexagon nuts, 20. epicoeles, 21. hexagon head bolts, 22. connecting passages, 23. valve rods, 24. sealing inclined-planes, 25. valve pockets, 26. rubber sealants, 27. flange plates, 28. positioning steps, 29. cavity of resorptions.
Diaphragm type constant-pressure check valve, is mainly to consist of parts such as valve body 1, flap 2, diaphragm positioning device, valve gap 14 and pressure-indication means, and it can be widely used in the drainage system under various pressure.
Described valve body 1 adopts horizontal DC formula structural design, is provided with valve pocket 25 in it, and valve body 1 two ends are respectively import and the outlet of valve pocket 25, is provided with the installation of flange plate 27 for external pipe at inlet/outlet place; Described valve pocket 25 middle parts are provided with and are “ " the sealing inclined-plane 24 of type, mainly as the keying of inlet/outlet, use; Described valve body 1 end face is made as middle flanged surface.
Described flap 2 sealing contacts are on sealing inclined-plane 24, these flap 2 back sides are provided with a positioning step 28, flap 2 upper ends are articulated and connected by valve rod 23 and valve body 1, thus flap 2 can rotate according to the intake pressure in valve pocket 25, thereby realize the keying to sealing inclined-plane 24.Meanwhile, the outer rubber sealant 26 that is also enclosed with of flap 2, for strengthening the sealing reliability between flap 2 and sealing inclined-plane 24.
Described diaphragm positioning device comprises the diaphragm seat 6 sealing on the middle flanged surface that is arranged on valve body 1 end face with hexagon head bolt 21 and packing ring 4, and be fixed on the diaphragm 8 between diaphragm seat and valve gap 14, between valve gap 14 and diaphragm seat 6 is fixedly by hexagon head bolt, hexagon nut 19 and spring washer are realized, at diaphragm seat 6 end faces, be also provided with the groove for diaphragm 8 periphery setting-ins, to strengthen the sealing reliability connecting, and diaphragm can will be separated into mutual disconnected epicoele 20 and cavity of resorption 29 between valve gap 14 and diaphragm seat 6, and in diaphragm seat 6, be also provided with two and be communicated with respectively the connecting passage 22 that cavity of resorption 29 and valve pocket 25 export.
Described diaphragm positioning device also comprises a positioning rod 3, this positioning rod upper end is passed after diaphragm 8, through top board 9, press table 7 and hexagon nut, is fixed on diaphragm 8, lower end holds out against mutually through diaphragm seat 6 and the positioning step 28 at flap 2 back sides, between positioning rod 3 and diaphragm seat 6, be also provided with an axle sleeve 5, this axle sleeve is solidly fixed by "O"-ring and thread connecting mode and diaphragm seat 6.
Described valve gap 14 tops are provided with the adjustment bolt 16 being threaded and lock the adjusting nut 15 of adjusting bolt, this adjustment bolt lower end is connected with spring seat 17 through valve gap 14, and between spring seat and top board 9, be provided with the pressure adjusting spring 18 of mutual pushing tow, therefore rotate the adjustment that can realize diaphragm 8 pressure by the cooperation of adjusting bolt 16 and adjusting nut 15.
Described pressure-indication means is arranged in valve gap 14, it comprises that a lower end is fixed on top board 9, upper end is provided with the screw rod 10 of pointer 11, in valve gap 14 1 sides, have viewing window 12 simultaneously, the pressure rating sign 13 corresponding with described pointer 11 is installed in viewing window, when diaphragm 8 pressurizeds change, can drive screw rod 10 to move up and down, and then drive pointer 11 to move in pressure rating sign 13 and obtain the pressure state indication when early gate.
The working principle of this diaphragm type constant-pressure check valve is: by operation adjustment bolt 16, regulate the pretightening force of pressure adjusting spring 18 to set the minimum cracking pressure of valve, when the pressure medium in pipeline is less than the minimum cracking pressure of valve, valve cannot be opened; When the pressure medium in pipeline is greater than the minimum cracking pressure of valve, medium promotes flap 2 and upwards rotates, valve opening.In addition, the minimum cracking pressure of valve also can show by pointer 11 in the indication in pressure rating sign 13.
The above is only preferred embodiments of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (6)
1. a diaphragm type constant-pressure check valve, comprises valve body (1), flap (2), diaphragm positioning device and valve gap (14); In described valve body (1), be provided with valve pocket (25), in this valve pocket, be provided with sealing inclined-plane (24); Described flap (2) sealing contact is upper on sealing inclined-plane (24), and this flap (2) upper end and valve body (1) are articulated and connected; Described diaphragm positioning device comprise sealing be arranged on the diaphragm seat (6) at valve body (1) top and be fixed on diaphragm seat (6) and valve gap (14) between diaphragm (8), this diaphragm will be separated into mutual disconnected epicoele (20) and cavity of resorption (29) between valve gap (14) and diaphragm seat (6), and in diaphragm seat (6), is also provided with the connecting passage (22) that is communicated with respectively cavity of resorption (29) and valve pocket (25); Described diaphragm positioning device also comprises a positioning rod (3), this positioning rod upper end is fixed on diaphragm (8) through top board (9) and press table (7), lower end holds out against on flap (2) through diaphragm seat (6), it is characterized in that described valve gap (14) top is provided with adjustment bolt (16) and adjusting nut (15), this adjustment bolt (16) lower end is connected with spring seat (17) through valve gap (14), and between spring seat and top board (9), is provided with the pressure adjusting spring (18) of mutual pushing tow.
2. diaphragm type constant-pressure check valve according to claim 1, it is characterized in that being provided with pressure-indication means in described valve gap (14), this pressure-indication means comprises screw rod (10) and is arranged on the pointer (11) on screw rod, screw rod lower end is fixed on top board (9), described valve gap (14) one sides are provided with viewing window (12), and the pressure rating sign (13) corresponding with described pointer (11) is installed in this viewing window.
3. diaphragm type constant-pressure check valve according to claim 1 and 2, is characterized in that being provided with and sealing the axle sleeve (5) of installing between described positioning rod (3) and diaphragm seat (6).
4. diaphragm type constant-pressure check valve according to claim 1 and 2, is characterized in that described flap (2) back side is provided with the positioning step (28) holding out against for described positioning rod (3).
5. diaphragm type constant-pressure check valve according to claim 1 and 2, is characterized in that described flap (2) is wrapped with rubber sealant (26).
6. diaphragm type constant-pressure check valve according to claim 1 and 2, is characterized in that described valve body (1) two ends are provided with flange plate (27), and valve body (1) end face is made as the middle flanged surface of installing for described diaphragm seat (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320669488.8U CN203549011U (en) | 2013-10-29 | 2013-10-29 | Diaphragm type constant pressure check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320669488.8U CN203549011U (en) | 2013-10-29 | 2013-10-29 | Diaphragm type constant pressure check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203549011U true CN203549011U (en) | 2014-04-16 |
Family
ID=50467130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320669488.8U Expired - Lifetime CN203549011U (en) | 2013-10-29 | 2013-10-29 | Diaphragm type constant pressure check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203549011U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118449A (en) * | 2019-06-22 | 2019-08-13 | 娄伟 | A kind of hot Ju device for organizing water vapour directed flow |
-
2013
- 2013-10-29 CN CN201320669488.8U patent/CN203549011U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118449A (en) * | 2019-06-22 | 2019-08-13 | 娄伟 | A kind of hot Ju device for organizing water vapour directed flow |
| CN110118449B (en) * | 2019-06-22 | 2023-08-29 | 邰海军 | Heat dam device for organizing directional flow of water vapor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
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| CX01 | Expiry of patent term |