CN217815168U - High-pressure small-caliber air-discharge check valve - Google Patents
High-pressure small-caliber air-discharge check valve Download PDFInfo
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- CN217815168U CN217815168U CN202221796486.0U CN202221796486U CN217815168U CN 217815168 U CN217815168 U CN 217815168U CN 202221796486 U CN202221796486 U CN 202221796486U CN 217815168 U CN217815168 U CN 217815168U
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- main valve
- clearance fit
- lamella
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Abstract
A high-pressure small-caliber air-discharge check valve belongs to the technical field of high-pressure valves. The utility model discloses a main valve body, a serial communication port, main valve body side clearance fit and be connected with the other valve body, main valve body upside laminating and be connected with the branch road valve body, the internal clearance fit of main valve is fixed with the back holding ring, passes back holding ring clearance fit has the main valve lamella, the internal clearance fit of other valve is fixed with preceding holding ring, preceding holding ring one side interference fit is provided with the location axle, the location axle with main valve lamella clearance fit, the location axle with be provided with the spring between the main valve lamella, the both ends of spring are pushed up respectively the location axle with on the main valve lamella, the main valve body with clearance fit is provided with the uide bushing simultaneously between the branch road valve body, passes uide bushing clearance fit is provided with the branch road valve lamella. The utility model discloses can be convenient for maintain, assemble to satisfy medium automatic recycling.
Description
Technical Field
The utility model belongs to the technical field of the high-pressure valve, specifically relate to a small-bore no-load check valve of high pressure.
Background
The air exhaust check valve is a high-pressure valve arranged on a pipeline at the outlet end of a high-pressure water feed pump in a nuclear power conversion system and is used for preventing water feed from flowing backwards and protecting the water feed pump. The air discharge check valve realizes the work of the medium automatic recirculation bypass, and when the water feeding pump is in a low-load or non-pressure state, the automatic recirculation bypass is opened to ensure the safe operation of the water pump. The recirculation bypass is automatically closed when the empty check valve is open.
The conventional air discharge check valve generally adopts a labyrinth structure, which is very complicated and causes difficulty in maintenance after the assembly of a small-bore valve. Therefore, there is a need for a high pressure, small bore empty check valve that is relatively simple, easy to assemble and maintain, and satisfies the requirement for automatic media recirculation.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model makes up the defects of the prior art and provides a high-pressure small-caliber empty discharge check valve; the utility model discloses can be convenient for maintain, assemble to satisfy medium automatic recycling.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
The utility model provides a high-pressure small-bore no-return valve, including the main valve body, its characterized in that, main valve body side clearance fit is connected with other valve body, the main valve body upside laminating is connected with the branch road valve body, the internal clearance fit of main valve is fixed with back holding ring, passes back holding ring clearance fit has the main valve lamella, the internal clearance fit of side valve is fixed with preceding holding ring, preceding holding ring one side interference fit is provided with the location axle, the location axle with main valve lamella clearance fit, the location axle with be provided with the spring between the main valve lamella, the both ends of spring are pushed up respectively the location axle with on the main valve lamella, the main valve body with clearance fit is provided with the uide bushing simultaneously between the branch road valve body, passes uide bushing clearance fit is provided with the branch road valve clack, the bottom of branch road valve clack corresponds the laminating and is provided with the catch bar, the catch bar pass the split pin with the uide bushing connects, the catch bar with uide bushing clearance fit, the bottom of catch bar passes the dysmorphism hole that sets up on the lamella.
Furthermore, the rear positioning ring, the front positioning ring, the guide sleeve and the main valve flap are all provided with medium flowing holes.
Furthermore, a sealing gasket is arranged between the main valve body and the side valve body.
Further, an outer O-shaped ring is arranged between the branch valve body and the guide sleeve.
Further, an inner O-shaped ring is arranged between the guide sleeve and the main valve body.
Furthermore, an internal thread cylindrical pin is arranged between the guide sleeve and the main valve body in a clearance fit mode, the bottom end of the internal thread cylindrical pin abuts against the main valve body, and the branch valve body is pressed at the top end of the internal thread cylindrical pin.
Further, the bypass valve flap includes a large head portion and a thin rod portion connected to each other, the thin rod portion passing through the medium flow hole, the large head portion being in the guide sleeve and in clearance fit with the guide sleeve.
Furthermore, the main valve body and the bypass valve body are connected through bolts, nuts, elastic gaskets and flat gaskets.
The beneficial effects of the utility model.
The utility model discloses simple structure, the assembly and the maintenance of being convenient for reform transform bypass labyrinth structure into branch road valve clack inner seal, O type circle seal structure, realize the catch bar by the main valve lamella and drive the linkage of branch road valve clack, still can realize the automatic recirculation of medium when solving the structure complicacy, can guarantee the safe operation of water pump.
Drawings
In order to make the technical problem, technical scheme and beneficial effect that the utility model solved more clearly understand, it is right to combine the attached drawing and detailed description mode below the utility model discloses further detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 isbase:Sub>A partial schematic view of the invention frombase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a schematic cross-sectional view of the guide sleeve of the present invention.
Fig. 4 is a schematic bottom view of the guide sleeve of the present invention.
Fig. 5 is a schematic perspective view of the push rod of the present invention.
The labels in the figure are: the main valve body 1, the bypass valve body 2, the branch valve body 3, the rear positioning ring 4, the main valve flap 5, the front positioning ring 6, the positioning shaft 7, the spring 8, the guide sleeve 9, the branch valve flap 10, the push rod 11, the split pin 12, the special-shaped hole 13, the medium flow hole 14, the sealing gasket 15, the outer O-shaped ring 16, the inner O-shaped ring 17, the inner threaded cylindrical pin 18, the large head 19 and the thin rod part 20.
Detailed Description
As shown in the accompanying drawings, the present embodiment provides a high-pressure small-bore no-load check valve, which includes a main valve body 1. The main valve body 1 is in side clearance fit and is connected with a side valve body 2 through a bolt, a nut, an elastic gasket and a flat gasket, and a sealing gasket 15 is arranged between the main valve body 1 and the side valve body 2 to prevent the medium from leaking outside.
The main valve body 1 is internally clearance-fitted and fixed with a rear positioning ring 4 through assembly welding, the rear positioning ring 4 is provided with a medium flowing hole 14 to ensure the flow area, a main valve flap 5 passes through the rear positioning ring 4 in clearance fit, and the main valve flap 5 is made of precipitation hardening steel. The inner clearance of the side valve body 2 is matched and fixed with a front positioning ring 6 through assembly welding, and the front positioning ring 6 is provided with a medium flowing hole 14 to ensure the flow area.
A positioning shaft 7 is arranged on one side of the front positioning ring 6 in an interference fit mode, the positioning shaft 7 is in clearance fit with the main valve flap 5, a spring 8 is arranged between the positioning shaft 7 and the main valve flap 5, two ends of the spring 8 are respectively abutted to the positioning shaft 7 and the main valve flap 5, a medium flow hole 14 is formed in the main valve flap 5 to prevent a piston effect from occurring, the spring 8 can achieve opening and closing of the main valve flap 5 according to medium flow, and the positioning shaft 7 and the rear positioning ring 4 can determine the radial moving position of the main valve flap 5.
The main valve body 1 is connected with a branch valve body 3 through a bolt, a nut, an elastic pad and a flat gasket, and the main valve body 1 and the branch valve body 3 are mutually attached. A guide sleeve 9 is arranged between the main valve body 1 and the branch valve body 3 in a clearance fit mode, an outer O-shaped ring 16 is arranged between the branch valve body 3 and the guide sleeve 9, an inner O-shaped ring 17 is arranged between the guide sleeve 9 and the main valve body 1, and the outer O-shaped ring 16 and the inner O-shaped ring 17 are both used for preventing media from leaking outwards.
Still clearance fit is simultaneously provided with internal thread cylindric lock 18 between uide bushing 9 and the main valve body 1, and internal thread cylindric lock 18 bottom is pushed up on main valve body 1, and branch road valve body 3 presses at internal thread cylindric lock 18 top, and internal thread cylindric lock 18 is used for preventing the axial of uide bushing 9 and rotates.
The guide sleeve 9 is also provided with a medium flow hole 14 for ensuring the flow area, a branch valve flap 10 is arranged through the guide sleeve 9, the branch valve flap 10 comprises a large head part 19 and a thin rod part 20 which are connected with each other, the thin rod part 20 penetrates through the guide sleeve 9, a medium can flow between the thin rod part 20 and the guide sleeve 9 to prevent a piston effect, and the large head part 19 is arranged in the guide sleeve 9 and in clearance fit with the guide sleeve 9 to determine the position when the branch is closed.
The bottom end of the branch valve flap 10 is correspondingly provided with a push rod 11 in an attaching manner, the push rod 11 is connected with the guide sleeve 9 through a split pin 12, the push rod 11 is in clearance fit with the guide sleeve 9, the bottom end of the push rod 11 penetrates through a special-shaped hole 13 formed in the main valve flap 5, and under the action of medium flow and the spring 8, the main valve flap 5 drives the push rod 11 to realize linkage of the branch valve flap 10.
The working principle is as follows: medium enters from the opposite side of a bypass valve body 2 of a main valve body 1, when the medium flow is larger than the force generated by the initial compression of a spring 8, the medium acts on a main valve flap 5, the main valve flap 5 moves towards the side of the bypass valve body 2 to be opened, at the moment, a push rod 11 drives a branch valve flap 10 to move upwards, and when the branch valve flap 10 is in a closed state, the main valve flap 5 is in a full-open state; when the water supply pump is in a low-load or non-pressure state, the main valve clack 5 moves towards the opposite side of the bypass valve body 2 to be closed, at the moment, the push rod 11 drives the branch valve clack 10 to move downwards, and the automatic recirculation bypass is opened to ensure the safe operation of the water pump.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (8)
1. The utility model provides a high-pressure small-bore no-load check valve, includes the main valve body (1), its characterized in that, the main valve body (1) side clearance fit is connected with other valve body (2), the laminating of the main valve body (1) upside is connected with branch road valve body (3), clearance fit is fixed with back holding ring (4) in the main valve body (1), passes back holding ring (4) clearance fit has main valve lamella (5), clearance fit is fixed with preceding locating ring (6) in other valve body (2), preceding holding ring (6) one side interference fit is provided with location axle (7), location axle (7) with main valve lamella (5) clearance fit, location axle (7) with be provided with between main valve lamella (5) spring (8), the both ends of spring (8) are pushed up respectively location axle (7) with on main valve lamella (5), main valve body (1) with clearance fit is provided with uide bushing (9) simultaneously between branch road valve body (3), pass guide bushing (9) clearance fit is provided with branch road valve lamella (10), the branch road valve lamella (10) correspond catch bar (11) and catch bar (11) through clearance fit (11) and catch bar (11) connection, the bottom end of the push rod (11) penetrates through a special-shaped hole (13) formed in the main valve flap (5).
2. A high-pressure small-bore no-return valve according to claim 1, characterized in that the rear positioning ring (4), the front positioning ring (6), the guiding sleeve (9) and the main valve flap (5) are provided with a medium flow hole (14).
3. A high-pressure small-bore no-return valve according to claim 1, characterized in that a sealing gasket (15) is provided between the main valve body (1) and the bypass valve body (2).
4. A high-pressure small-bore no-return valve according to claim 1, characterized in that an external O-ring (16) is provided between the branch valve body (3) and the guide sleeve (9).
5. A high-pressure small-bore no-return valve according to claim 1, characterized in that an internal O-ring (17) is provided between the guide sleeve (9) and the main valve body (1).
6. A high-pressure small-bore no-return valve according to claim 1, characterized in that an internally threaded cylindrical pin (18) is also arranged between the guide sleeve (9) and the main valve body (1) in a clearance fit manner, the bottom end of the internally threaded cylindrical pin (18) abuts against the main valve body (1), and the branch valve body (3) presses against the top end of the internally threaded cylindrical pin (18).
7. A high-pressure small-bore no-return valve according to claim 2, characterized in that the bypass valve flap (10) comprises a large head (19) and a thin stem (20) connected to each other, the thin stem (20) passing through the medium flow orifice (14), the large head (19) being in the guide sleeve (9) and clearance-fitted with the guide sleeve (9).
8. A high-pressure small-bore no-return valve according to claim 1, characterized in that the main valve body (1) and the bypass valve body (2), and the main valve body (1) and the bypass valve body (3) are connected by bolts, nuts, washers and flat gaskets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221796486.0U CN217815168U (en) | 2022-07-13 | 2022-07-13 | High-pressure small-caliber air-discharge check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221796486.0U CN217815168U (en) | 2022-07-13 | 2022-07-13 | High-pressure small-caliber air-discharge check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217815168U true CN217815168U (en) | 2022-11-15 |
Family
ID=83964469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221796486.0U Active CN217815168U (en) | 2022-07-13 | 2022-07-13 | High-pressure small-caliber air-discharge check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217815168U (en) |
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2022
- 2022-07-13 CN CN202221796486.0U patent/CN217815168U/en active Active
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