CN218236336U

CN218236336U - High-precision large-flow pilot-operated nitrogen release valve

Info

Publication number: CN218236336U
Application number: CN202222094165.2U
Authority: CN
Inventors: 倪柏良; 倪狄鑫; 倪科伟
Original assignee: Hangzhou High Water Fluid Control Equipment Co
Current assignee: Hangzhou High Water Fluid Control Equipment Co
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-01-06
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a pilot-operated nitrogen leakage valve with high precision and large flow, which comprises a main valve body, a valve cover arranged on the main valve body, an actuator arranged on the valve cover, a director valve body arranged on the actuator, a director arranged on the director valve body and a main valve rod arranged on the actuator; the automatic pressure regulator is characterized in that a pressure reducer is connected to the valve body of the commander, and the pressure reducer is connected with an external pressure supply device; the main valve rod is provided with a pressure reducing valve core; and the commanding device valve body is provided with a throttling adjusting assembly. The pressure reducing valve core of the utility model enables the force required by the valve to be smaller when the valve is opened and closed, the operation to be stable and the adjusting precision to be improved; when the valve is opened by changing the installation position of the throttling adjusting assembly, the valve rod does not pass through the valve seat any more, and the flow of nitrogen is increased.

Description

High-precision large-flow pilot-operated nitrogen release valve

Technical Field

The utility model relates to a let out nitrogen valve technical field, concretely relates to big-traffic guide's formula let out nitrogen valve with high accuracy.

Background

The nitrogen sealing device mainly comprises a nitrogen supply valve and a nitrogen discharge valve, wherein the nitrogen discharge valve generally comprises an internal feedback pressure opening type micro-pressure regulating valve. The pressure before the valve of current let out nitrogen valve directly acts on the diaphragm, can have pressure unstability, leads to the problem that valve regulation precision is low.

Through retrieving chinese patent, the utility model discloses an outside guide's formula lets out nitrogen valve, structure through the guide for the regulation precision of valve is more accurate, can also accurately carry out opening and shutting of adjusting valve under the condition of minute-pressure, supply the pressure to the commander valve body through connecting outside pressure supply device on the pressure reducer simultaneously, make commander valve body supply to press more stable, thereby improve and adjust the precision, but it still has following drawback in the in-service use:

1. when the valve is opened, the valve rod penetrates through the valve seat, and occupies a part of the valve seat, so that the flow of the valve is influenced;

2. the utility model discloses a when the valve opens and shuts, the valve before with the valve after pressure difference too big, required power is great when the valve opens and shuts, the valve is unstable of operation when opening and shutting, the influence adjusts the precision.

Therefore the utility model provides a big-traffic guide's formula nitrogen release valve of high accuracy solves the drawback that the publication is CN214119069U utility model.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a have high accuracy large-traffic guide's formula and let out nitrogen valve, through the decompression case, required power is less when making the valve open and shut, operates steadily, improves and adjusts the precision, and when the change through throttle adjusting part mounted position made the valve open, the valve rod no longer passed the disk seat, increased the flow of nitrogen gas.

In order to achieve the above object, the present invention provides a pilot-operated nitrogen release valve with high precision and large flow rate, which comprises a main valve body, a valve cover installed on the main valve body, an actuator installed on the valve cover, a commander valve body installed on the actuator, a commander installed on the commander valve body, and a main valve rod installed on the actuator; the commanding device valve body is connected with a pressure reducer, and the pressure reducer is connected with an external pressure supply device; a pressure reducing valve core is arranged on the main valve rod; and the commander valve body is provided with a throttling adjusting assembly.

Optionally, a main valve seat is mounted in the main valve body; a valve cage is arranged on the main valve seat; the pressure reducing valve core installed on the main valve rod is located in the valve cage.

Optionally, the pressure reducing valve core comprises a small valve core arranged on the main valve rod, a valve core cover arranged on the main valve rod, a valve sleeve arranged on the valve core cover and a large valve core arranged outside the valve sleeve; a first through hole is formed in the valve cage.

Optionally, a nitrogen gas outlet corresponding to the small valve core is arranged at the bottom of the large valve core; a third through hole is formed in the side face of the valve sleeve; a second through hole corresponding to the third through hole is formed in the side face of the big valve core; the main valve rod is provided with a limiting block positioned between the small valve core and the valve core cover; the first through hole is larger than the second through hole and the third through hole.

Optionally, a spool spring in contact with the bottom of the limiting block is sleeved on the small spool; a cavity is formed between the limiting block and the valve core cover; the second through hole is larger than the third through hole; and a sealing ring is arranged between the valve core cover and the valve sleeve.

Optionally, a first pressure pipe and a second pressure pipe are arranged on the commander valve body; the first pressure guide pipe is connected with the upper end of the actuator; the second pressure guide pipe is connected with the lower end of the actuator; the throttling adjusting assembly is installed on the first pressure guide pipe.

Optionally, the throttling adjusting assembly includes a mounting sleeve mounted on the pilot valve body, and an adjusting column mounted on the mounting sleeve and corresponding to the first pressure pipe.

Optionally, a limiting block is arranged on the adjusting column; and a sealing sleeve contacted with the limiting block is further installed on the adjusting column.

Optionally, a director push rod is mounted on the director; and a director valve core is arranged on the director push rod.

Compared with the prior art, the utility model provides a big-traffic guide's formula nitrogen release valve of high accuracy possesses following beneficial effect:

1. this a big-traffic guide's formula nitrogen release valve with high accuracy, through the setting of decompression case, the main valve pole drives little case earlier and carries out the up-and-down motion, little case drives big case again and carries out the up-and-down motion, when carrying out the pressure release, little case opens earlier, after letting out partial pressure, valve pressure reduces, drive big case by little case and open the valve, when the valve is closed, little case drives big case and closes, required power when reducing the valve and opening and shutting, it is stable to make the valve move when opening and shutting, thereby improve the speed of reaction when the valve opens and shuts, improve and adjust the precision.

2. This kind of pilot-operated formula nitrogen release valve with high accuracy is large-traffic installs on first pressure pipe through throttle adjusting part for when the valve is opened, the case is located the top of disk seat, and the valve rod need not pass the disk seat, has increased the disk seat and can pass the area of nitrogen gas, thereby has improved the flow of valve.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a partial enlarged view of the utility model at A;

fig. 3 is a partial enlarged view of the utility model at the position B;

fig. 4 is a schematic structural diagram of the pressure reducing valve core of the present invention;

fig. 5 is a schematic structural view of the adjusting column and the sealing sleeve of the present invention.

The following are marked in the figure: 1. a main valve body; 11. a valve cover; 12. a main valve stem; 121. a limiting block; 13. a main valve seat; 14. a cage; 141. a first through hole; 2. an actuator; 3. a commander valve body; 31. a first pressure pipe; 32. a second pressure pipe; 4. a director; 41. a director push rod; 42 a commander valve cartridge; 5. a pressure reducer; 6. a pressure reducing valve core; 61. a small valve core; 62. a valve core cover; 621. a seal ring; 63. a valve housing; 631. a third through hole; 64. a large valve core; 641. a nitrogen gas outflow hole; 642. a second through hole; 65. a spool spring; 66. a cavity; 7. a throttle adjustment assembly; 71. installing a sleeve; 72. an adjustment column; 73. a limiting table; 74. and (5) sealing the sleeve.

Detailed Description

The following detailed description and specific examples are described in connection with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many different forms without departing from the spirit or essential characteristics thereof, which should not be construed as limited to the embodiments set forth herein.

The utility model discloses a have high accuracy large-traffic guide's formula nitrogen release valve can be applicable to nitrogen seal device's nitrogen release valve, also can be used to other similar application scenes of course, uses a guide's formula nitrogen release valve with high accuracy large-traffic to describe in detail below as an example.

Referring to fig. 1-5, the structure of the preferred embodiment of the pilot-operated nitrogen bleed valve with high precision and large flow rate according to the present invention is shown schematically. The pilot-operated nitrogen release valve with high precision and large flow comprises a main valve body 1, a valve cover 11 arranged on the main valve body 1, an actuator 2 arranged on the valve cover 11, a director valve body 3 arranged on the actuator 2, a director 4 arranged on the director valve body 3 and a main valve rod 12 arranged on the actuator 2; wherein, the commander valve body 3 is connected with a pressure reducer 5, and the pressure reducer 5 is connected with an external pressure supply device; the main valve body 12 is provided with a pressure reducing valve core 6; the commanding valve body 3 is provided with a throttling adjusting component 7; the utility model discloses a pressure before the valve will be earlier carried out the part with the setting of decompression case and write out the back, opens completely again to reduce before the valve and behind the valve pressure difference, make the valve open and shut required power littleer, make opening and shutting of valve more stable, thereby improve the speed of reaction when the valve opens and shuts, improve the valve precision.

Referring to fig. 1-3, in the present invention, a main valve seat 13 is installed in a main valve body 1, and a valve cage 14 is installed on the main valve seat 13 through a threaded connection; the pressure reducing valve core 6 is positioned in the valve cage 14; the pressure reducing valve core 6 comprises a small valve core 61 arranged on the main valve rod 12, a valve core cover 62 arranged on the main valve rod 12, a valve sleeve 63 arranged on the valve core cover 62 and a large valve core 64 arranged outside the valve sleeve 63; wherein the valve cage 14 is provided with a first through hole 141; the bottom of the large valve core 64 is provided with a nitrogen outlet 641 corresponding to the small valve core 61; the utility model discloses a setting that little case 61 and nitrogen gas stream bore 641, when the valve was opened, little case 61 made the first upward movement, opened nitrogen gas stream and bored 641, made partial nitrogen gas stream bore 641 carry out the pressure release through nitrogen gas stream to reduce the pressure differential before the valve behind with the valve, make more steady when opening big case 64, thereby improve the speed of reaction when the valve opened and shut, improve the valve precision.

Referring to fig. 1-4, in the present invention, a third through hole 631 is disposed on a side surface of the valve sleeve 63, a second through hole 642 corresponding to the third through hole 631 is disposed on a side surface of the large valve core 64, and a stopper 121 disposed between the small valve core 61 and the valve core cover 62 is disposed on the main valve rod 12; the small valve core 61 is sleeved with a valve core spring 65 contacting with the bottom of the limiting block 121; the first through hole 141 is larger than the second through hole 642 and the second through hole 631, the second through hole 642 is larger than the third through hole 631, and a cavity 66 is formed between the limiting block 121 and the spool cover 62; a sealing ring 621 is arranged between the valve core cover 62 and the valve sleeve 63; the utility model discloses a set first through-hole 141 to be greater than second through-hole 642, second through-hole 642 is greater than third through-hole 631, make when letting out nitrogen, nitrogen gas passes second through-hole 141, second through-hole 642 and third through-hole 631 in proper order, because the continuous reduction in hole, nitrogen gas constantly receives and blocks, forms multistage decompression, thereby reduces the impact force when the valve just opens or will close, makes the opening and shutting of valve more steady, prolongs the life of letting out nitrogen valve; through the setting of case spring 65, improve the sensitivity of little case 61, when opening the valve, case spring 65 resets, applys the power of opening the valve for little case 61 simultaneously, makes the response speed of little case 61 faster, improves the sensitivity of little case 61, improves the speed that little case 61 opened to improve the control accuracy of valve.

Referring to fig. 1-5, in the present invention, a first pressure pipe 31 and a second pressure pipe 32 are provided on the pilot valve body 3, and the first pressure pipe 31 is connected to the upper end of the actuator 2; the second pressure guide pipe 32 is connected with the lower end of the actuator 2, and the throttle adjusting component 7 is arranged on the first pressure guide pipe 31; the throttling regulation assembly 7 comprises a mounting sleeve 71 arranged on the commander valve body 3 and a regulation column 72 which is arranged on the mounting sleeve 71 and corresponds to the first pressure guide pipe 31; the utility model can adjust the flow of the first pressure pipe 31 through the arrangement of the throttle adjusting component 7, and conveniently adjust the pressure at the upper end of the actuator 2, when the throttle adjusting component 7 closes the passage of the first pressure pipe 31, the opening and closing of the valve body 3 of the pilot valve is matched to change the pressure of the second pressure pipe 32, so as to change the up-and-down movement of the diaphragm in the actuator and realize the opening and closing of the main valve body 1; the throttling adjusting assembly 7 is installed on the first pressure guide pipe 31, so that the throttling adjusting assembly 7 closes the first pressure guide pipe 31, the upper cavity of the actuator 2 is stabilized, when the pressure in front of the valve is too large, the pressure reducing valve core 6 is driven to move upwards, when the valve is opened, the main valve rod 12 cannot penetrate through the main valve seat 13, the area of the main valve seat 13 for flowing nitrogen is used, and large flow of nitrogen can be conducted.

Referring to fig. 1-5, in the present invention, a limiting platform 73 is provided on the adjusting column 72; a sealing sleeve 74 which is contacted with the limiting table 73 is also arranged on the adjusting column 72; a director push rod 41 is arranged on the director 4, and a director valve core 42 is arranged on the director push rod 41; the utility model limits the installation position of the sealing sleeve 74 through the arrangement of the limiting table 73, which is convenient for the sleeving of the sealing sleeve 74; through the setting of seal cover 74, when sealing up first connecting pipe 31 through adjusting post 72, seal cover 74 is filled the gap of adjusting post 72 and first connecting pipe 31 junction, improve the leakproofness of adjusting post 72, prevent that the outside from supplying the pressure supply gas of pressing the device and getting into in first connecting pipe 31, thereby the pressure differential of cavity is more accurate about executor 2, it is more accurate that the scope is opened through main valve pole 12 drive pressurization case 6 to time executor 2, thereby improve the regulation precision of valve.

Referring to fig. 1-5, the application of the present invention is that, firstly, after the external pressure supply device is used to reduce the pressure through the pressure reducer 5, a stable pressure is provided to the commander valve body 3, and then the first pressure guiding pipe 31 is closed through the adjusting column 72, so as to stabilize the pressure of the upper cavity of the actuator 2; when the pressure in front of the valve is too high, the pressure transmitted to the upper cavity of the commander 4 by the valve front pressure guiding pipe is increased, so that the commander 4 controls the commander push rod 41 to move downwards, the commander push rod 41 drives the commander valve core 42 to move downwards, the commander valve body 3 is opened, the pressure of the second pressure guiding pipe 32 is increased, the pressure of the lower cavity of the actuator 2 is increased, so that the actuator 2 controls the main valve rod 12 to move upwards, the main valve rod 12 drives the small valve core 61 to move upwards, the valve core spring 65 resets to push the small valve core 61 to move upwards, nitrogen flows into the valve through the nitrogen outflow hole 641 to be released, when the small valve core 61 moves to the top of the cavity 66 and contacts with the bottom of the valve core cover 62, the main valve rod 12 continues to move upwards, the small valve core 61 drives the valve core cover 62 to move upwards, the valve core cover 62 drives the valve sleeve 63 to move upwards, the large valve core 64 is separated from the main valve seat 13, so that the valve is opened to release the nitrogen; when the pressure in front of the valve is too small, the pressure transmitted to the upper cavity of the commander 4 by the front pressure guiding pipe of the valve is reduced, so that the commander 4 controls the valve core 42 of the commander to move upwards, the commander valve body 3 is closed, the pressure of the second pressure guiding pipe 32 is reduced, the actuator 2 controls the main valve rod 12 to drive the small valve core 61 to move downwards, after the small valve core 61 moves to the stroke of the cavity 66, the nitrogen gas outflow hole 641 is closed, the valve core spring 65 is compressed, the valve core spring 65 pushes the large valve core 64 to move downwards, the large valve core 64 drives the valve sleeve 63 to move downwards, the valve sleeve 63 drives the valve core cover 62 to move downwards, so that the main valve body 1 is closed, the pressure in front of the valve is higher, and the flow control of the valve is realized.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. A pilot-operated nitrogen release valve with high precision and large flow comprises a main valve body (1), a valve cover (11) arranged on the main valve body (1), an actuator (2) arranged on the valve cover (11), a director valve body (3) arranged on the actuator (2), a director (4) arranged on the director valve body (3) and a main valve rod (12) arranged on the actuator (2); the automatic pressure-reducing device is characterized in that a pressure reducer (5) is connected to the commander valve body (3), and the pressure reducer (5) is connected with an external pressure supply device; a pressure reducing valve core (6) is arranged on the main valve rod (12); and a throttling adjusting component (7) is arranged on the commander valve body (3).

2. A pilot operated nitrogen bleed valve with high accuracy and high flow rate according to claim 1, characterized in that a main valve seat (13) is installed in the main valve body (1); a valve cage (14) is arranged on the main valve seat (13); the pressure reducing valve core (6) arranged on the main valve rod (12) is positioned in the valve cage (14).

3. A pilot operated nitrogen bleed valve with high accuracy and large flow rate according to claim 2, characterized in that the pressure reducing spool (6) comprises a small spool (61) mounted on the main valve stem (12), a spool cover (62) mounted on the main valve stem (12), a valve housing (63) mounted on the spool cover (62), and a large spool (64) mounted outside the valve housing (63); a first through hole (141) is formed in the valve cage (14).

4. A pilot-operated nitrogen bleed valve with high precision and large flow rate according to claim 3, characterized in that the bottom of the large valve core (64) is provided with a nitrogen flow outlet hole (641) corresponding to the small valve core (61); a third through hole (631) is formed in the side surface of the valve sleeve (63); a second through hole (642) corresponding to the third through hole (631) is formed in the side surface of the big valve core (64); a limiting block (121) positioned between the small valve core (61) and the valve core cover (62) is arranged on the main valve rod (12); the first through hole (141) is larger than the second through hole (642) and the third through hole (631).

5. The pilot-operated nitrogen release valve with high precision and large flow rate according to claim 4, characterized in that a valve core spring (65) contacting with the bottom of the limiting block (121) is sleeved on the small valve core (61); a cavity (66) is formed between the limiting block (121) and the valve core cover (62); the second through hole (642) is larger than the third through hole (631); and a sealing ring (621) is arranged between the valve core cover (62) and the valve sleeve (63).

6. The pilot operated nitrogen release valve with high precision and large flow rate according to claim 1, characterized in that a first pressure guide pipe (31) and a second pressure guide pipe (32) are arranged on the pilot valve body (3); the first pressure guide pipe (31) is connected with the upper end of the actuator (2); the second pressure guide pipe (32) is connected with the lower end of the actuator (2); the throttling adjusting assembly (7) is installed on the first pressure guide pipe (31).

7. The pilot-operated nitrogen release valve with high precision and large flow rate according to claim 6, characterized in that the throttling regulation assembly (7) comprises a mounting sleeve (71) mounted on the pilot valve body (3), and a regulation column (72) mounted on the mounting sleeve (71) and corresponding to the first pressure pipe (31).

8. The pilot-operated nitrogen release valve with high precision and large flow rate of claim 7 is characterized in that a limit table (73) is arranged on the adjusting column (72); and a sealing sleeve (74) which is in contact with the limiting table (73) is also arranged on the adjusting column (72).

9. The pilot-operated nitrogen relief valve with high precision and high flow rate as claimed in claim 1, characterized in that a pilot push rod (41) is mounted on the pilot (4); and a director valve core (42) is arranged on the director push rod (41).