CN212509541U - Pneumatic throttle valve with built-in two-stage throttling pressure reducing needle - Google Patents
Pneumatic throttle valve with built-in two-stage throttling pressure reducing needle Download PDFInfo
- Publication number
- CN212509541U CN212509541U CN202021043488.3U CN202021043488U CN212509541U CN 212509541 U CN212509541 U CN 212509541U CN 202021043488 U CN202021043488 U CN 202021043488U CN 212509541 U CN212509541 U CN 212509541U
- Authority
- CN
- China
- Prior art keywords
- valve
- sealing
- pneumatic
- valve seat
- throttling
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a built-in two-stage throttle step-down needle type pneumatic choke valve relates to valve technical field. The utility model comprises a valve body, a valve seat, a valve core, a valve rod and a pneumatic driving component, wherein the valve seat is provided with a valve cage, the valve cage is provided with a window, and the window communicates a fluid inlet and a fluid outlet; the lower end of the valve cage is in sealing contact with the valve seat, and the upper end of the valve cage extends into the fluid flow channel; a closing-in part is arranged at the lower end of the windowing position of the valve cage, a sealing part in sealing fit with the valve seat is arranged at the bottom of the valve core, and a throttling part in sealing fit with the closing-in part of the valve cage is arranged at the upper end of the valve core; the sealing part comprises a frustum which is in conical surface sealing fit with the opening of the valve seat and a sealing section which extends into the valve seat; the upper end of the valve core is connected with the bottom end of the valve rod. The utility model discloses a built-in case, valve cage II level throttle step-down design effectively slows down the erosion of inside throttle position and sealing position, extension valve life.
Description
Technical Field
The utility model relates to the technical field of valves, especially, relate to the valve of using in the supporting technique in directional well drilling rotation direction ground of oil gas well, more specifically say and relate to a pneumatic choke valve of built-in two-stage throttle step-down needle type.
Background
The directional well technology is one of the most advanced drilling technologies in the world petroleum exploration and development field, and is a drilling technology which effectively controls a well track through a special downhole tool, a measuring instrument and a process technology to enable a drill bit to drill to a preset underground target along a specific direction. The adoption of the directional well technology can economically and effectively develop oil gas resources with limited ground and underground conditions, greatly improve the oil gas yield and reduce the drilling cost, is favorable for protecting the natural environment, and has remarkable economic and social benefits. Directional drilling is a method of drilling a well bore to a desired formation along a pre-designed well deviation and azimuth.
The most important and most advanced technology in the directional well technology is the rotary steering drilling technology, and the rotary steering drilling command is a pulse signal downloading system which comprises a drill pipe and a stand pipe connected through a water hose, wherein the stand pipe forms a bypass through a tee joint, and a downloading device is arranged on the bypass. The outlet pipeline of the pneumatic regulating valve of the downward transmission device is inserted and fixed in the mud tank. The downloading device comprises a mechanical unit pneumatic regulating valve and an electrical unit. The throttle switch is programmed to transmit specific data signals required by the downhole tool to the valve position control positioner and to simultaneously control the positioner to begin operation. The received specific data signal is converted into a pneumatic signal, the same air source quantity is transmitted to the pneumatic accelerator to the air cylinder, and the air cylinder acts to link the regulating valve to work. Meanwhile, the valve core is opened or closed through an internal two-stage throttling design, and the drainage channel is quickly opened or closed to meet the normal working requirement of a preset system. During drilling of the whole rotary steering well, the throttle valve can be continuously opened and closed in the process of frequently sending instructions on the ground, and the design of the internal throttle structure directly influences the service life and safety of the whole valve.
The conventional pneumatic throttle valve at present has a throttling mode of a single-stage needle-shaped throttle valve or a plate-type throttle valve, the service life of the single-stage needle-shaped throttle valve is usually greatly reduced due to the influence of environmental use, the design of the plate-type throttle valve is superior to the needle-shaped design, the service life is also prolonged, but the maintenance cost is relatively expensive.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that exists among the above-mentioned prior art and not enough, the utility model provides a pneumatic choke valve of built-in two-stage throttle step-down needle type, the utility model discloses an invention aim at solve among the prior art and use the high-pressure mud choke valve at the device that passes down of rotatory steering well drilling, frequently open for a long time and close the in-process, can not effectively slow down the erosion of inside seal position for the valve is sealed not tight after long-term the use, and life reduces. The utility model discloses a pneumatic choke valve of built-in two-stage throttle step-down needle type adopts built-in case, and valve cage II level throttle step-down design effectively slows down the erosion of inside throttle position and sealing position, extension valve life.
In order to solve the problems existing in the prior art, the utility model discloses a realize through following technical scheme:
a built-in two-stage throttling pressure reducing needle type pneumatic throttling valve comprises a valve body, a valve seat, a valve core, a valve rod and a pneumatic driving assembly, wherein a fluid inlet and a fluid outlet are formed in the valve body; the valve rod drives the valve core to lift and control the flow of the fluid flow channel by matching with the valve seat, and the valve seat is arranged in the fluid flow channel and is coaxially and annularly arranged with the valve rod; the pneumatic driving assembly is arranged at the upper end of the valve body through a bracket, and an output shaft of the pneumatic driving assembly is connected with the upper end of the valve rod; the method is characterized in that: a valve cage is arranged on the valve seat, and a window is arranged on the valve cage and used for communicating the fluid inlet with the fluid outlet; the lower end of the valve cage is in sealing contact with the valve seat, and the upper end of the valve cage extends into the fluid flow channel; a closing-in part is arranged at the lower end of the windowing position of the valve cage, a sealing part in sealing fit with the valve seat is arranged at the bottom of the valve core, and a throttling part in sealing fit with the closing-in part of the valve cage is arranged at the upper end of the valve core; the sealing part comprises a frustum which is in conical surface sealing fit with the opening of the valve seat and a sealing section which extends into the valve seat; the upper end of the valve core is connected with the bottom end of the valve rod.
The working principle of the utility model is as follows:
the fluid flows to the fluid outlet through the fluid inlet, when the throttle valve is closed, the throttling part of the valve core is sealed with the closing position of the valve cage, the sealing part of the valve core is sealed with the valve seat, when the throttle valve needs to be opened, and the opening degree of the throttle valve is small, the throttling surface of the throttling part and the closing position of the valve cage is opened, the upper sealing section of the sealing part is still positioned in the valve seat, namely the sealing surface of the sealing part and the valve seat is still in the closed state, the erosion of the throttling surface by the fluid can be effectively reduced, when the opening degree is gradually increased, the sealing section of the sealing part is separated from the valve seat, so that the sealing surface is also opened, at the moment, the fluid is gradually depressurized through the throttling surface and the sealing surface, the flow. When the throttle valve is closed, the pneumatic driving assembly drives the valve rod to descend, the sealing section of the sealing portion is inserted into the valve seat, the sealing surface is closed firstly, the valve rod is driven to descend continuously, the frustum of the sealing portion is matched with the conical surface of the valve seat to achieve sealing, the throttling portion is sealed with the closing-in of the valve cage, and the throttling surface is closed. By the mode, the throttle surface can be effectively prevented from being washed, and the service life of the seal is effectively prolonged.
Furthermore, the bottom of the valve body is connected with a flange variable buckle through a bolt and a nut, the flange variable buckle is sealed with the bottom of the valve body through a sealing gasket I, and the flange variable buckle is sealed with the bottom of the valve seat through a sealing gasket II.
A packing cavity is arranged between the upper end of the valve body and the valve rod, a packing ring is arranged at the bottom in the packing cavity, sealing packing is arranged on the packing ring, and the sealing packing is sealed in the packing cavity through a packing compression ring.
The sealing filler comprises a plurality of sealing rings which are made of fillers woven by flexible graphite belts or flexible graphite through mould pressing, each sealing ring is provided with a radial 45-degree opening, the sealing rings are pressed into the filling cavity in sequence, and the openings of the upper and lower adjacent layers of sealing rings are staggered by 120 degrees in sequence.
The packing press ring is also provided with a packing gland, the packing gland is fixed on the valve body through a bolt and a nut, and the upper end of the valve rod penetrates through the packing cavity, the packing press ring and the packing gland to be connected with an output shaft of the pneumatic driving mechanism.
The pneumatic scale is characterized in that a scale is arranged on the support, a scale pointer is installed on an output shaft of the pneumatic driving mechanism, and the scale pointer carries out scale indication on the scale.
The pneumatic driving mechanism is a driving air cylinder, and an air pipe joint is arranged on a cylinder body of the driving air cylinder.
Compared with the prior art, the utility model discloses profitable technological effect who brings shows:
1. the utility model discloses a built-in case, valve cage form second grade throttle depressurization structure, can effectively slow down the erosion of inside throttle position, extension valve life.
2. The fluid flows to the fluid outlet through the fluid inlet, when the throttle valve is closed, the throttling part of the valve core is sealed with the closing position of the valve cage, the sealing part of the valve core is sealed with the valve seat, when the throttle valve needs to be opened, and the opening degree of the throttle valve is small, the throttling surface of the throttling part and the closing position of the valve cage is opened, the upper sealing section of the sealing part is still positioned in the valve seat, namely the sealing surface of the sealing part and the valve seat is still in the closed state, the erosion of the throttling surface by the fluid can be effectively reduced, when the opening degree is gradually increased, the sealing section of the sealing part is separated from the valve seat, so that the sealing surface is also opened, at the moment, the fluid is gradually depressurized through the throttling surface and the sealing surface, the flow. When the throttle valve is closed, the pneumatic driving assembly drives the valve rod to descend, the sealing section of the sealing portion is inserted into the valve seat, the sealing surface is closed firstly, the valve rod is driven to descend continuously, the frustum of the sealing portion is matched with the conical surface of the valve seat to achieve sealing, the throttling portion is sealed with the closing-in of the valve cage, and the throttling surface is closed. By the mode, the throttle surface can be effectively prevented from being washed, and the service life of the seal is effectively prolonged.
3. The utility model discloses in, sealed face and throttle face separately design for the valve is closed tightly, and when the valve was opened, the throttle face was opened earlier, opened behind the sealed face. When the valve is closed, the sealing surface is closed firstly, and the throttling surface is closed later, so that the throttling surface is prevented from being washed away, and the service life of the valve is effectively prolonged.
4. The utility model discloses in, case, valve cage and disk seat surface are through the hardening treatment or adopt the preparation of high rigidity material, and the hardness is highest can reach HRC85, and is able to bear or endure to erode, longe-lived. Just the utility model discloses flow control characteristic is good, and accommodation is big.
5. The utility model discloses in, form a big breach between the frustum of the last sealing of case and the seal segment, when containing solid particles such as welding slag in the fluid, because the existence of this breach for the case can not be died by the card, and the action is nimble.
6. This application sets up the flange bottom the valve body and becomes to detain, makes things convenient for being connected of valve body and pipeline, also convenient processing to the valve body, and the disk seat becomes to detain by the flange and fixes in the valve body, and convenient the dismantlement uses convenient the change after the wearing and tearing for a long time to maintain.
7. The utility model provides an adopt graphite packing ring in the packing intracavity, flexible graphite ring has that self-lubricity is good, coefficient of resilience is high, even under harsher high temperature condition, and its chemical properties is also very stable nature point, has good temperature resistant, and is anti-oxidant, acid and alkali corrosion resistance to have better compressive property, used as packing filler by wide application high temperature high pressure valve. The valve cover adopts a cover sealing mode to effectively reduce dynamic friction resistance, and the good compressibility of the graphite can effectively prolong the service life.
8. The sealing filler is a matched sealing ring made of flexible graphite strips or flexible graphite braided filler through die pressing, and each ring is provided with a radial 45-degree opening. During installation, the first ring is first sleeved on the valve rod through the opening and then pressed to the bottom of the stuffing box of the valve uniformly by a split cylinder or a pressing tool. And then sequentially loading the graphite sealing rings, enabling openings of two adjacent layers of the graphite sealing rings to be staggered by 120 degrees in sequence, compressing each layer by the method, finally, tightly compressing the packing gland by screwing the packing gland nut, and withdrawing the gland nut by a half circle to realize the dynamic sealing of the high-pressure slurry of the valve rod.
9. The utility model discloses a gland packing is applied to and has effectively solved the sealed life of tradition low on the device choke valve that passes downwards of rotary transduction, and the poor defect of security can the effectual life who improves a whole set of system. Can be widely applied to the dynamic sealing of high pressure and high temperature of petroleum.
Drawings
FIG. 1 is a sectional view of the overall structure of the pneumatic throttle valve of the present invention;
FIG. 2 is a schematic structural view of the valve cartridge of the present invention;
FIG. 3 is a schematic structural view of a filling cavity in the pneumatic throttle valve of the present invention;
FIG. 4 is a schematic structural diagram of a sealing ring of the pneumatic throttle valve of the present invention;
description of the drawings: 1. the valve comprises a valve body, 2, a valve seat, 3, a valve core, 4, a valve rod, 5, a pneumatic driving assembly, 6, a fluid flow channel, 7, a support, 8, an output shaft, 9, a valve cage, 10, a windowing, 11, a closing-in, 12, a sealing part, 13, a throttling part, 14, a frustum, 15, a sealing section, 16, a throttling surface, 17, a sealing surface, 18, a flange buckle, 19, sealing gaskets I and 20, sealing gaskets II and 21, a packing cavity, 22, a packing ring, 23, a packing press ring, 24, a sealing ring, 25, a packing press cover, 26, an opening, 27, a scale, 28, a scale pointer, 29 and an air pipe joint.
Detailed Description
The technical solution of the present invention will be further elaborated with reference to the drawings attached to the description.
Example 1
As a preferred embodiment of the present invention, referring to fig. 1 and 2 of the specification, the present embodiment discloses:
a built-in two-stage throttling pressure reducing needle type pneumatic throttling valve comprises a valve body 1, a valve seat 2, a valve core 3, a valve rod 4 and a pneumatic driving component 5, wherein a fluid inlet and a fluid outlet are formed in the valve body 1, a fluid flow passage 6 is formed in the valve body 1, and the fluid inlet and the fluid outlet are communicated through the fluid flow passage 6; the valve rod 4 drives the valve core 3 to lift and control the flow of the fluid flow channel 6 by matching with the valve seat 2, and the valve seat 2 is arranged in the fluid flow channel 6 and is coaxially and annularly arranged with the valve rod 4; the pneumatic driving assembly 5 is arranged at the upper end of the valve body 1 through a bracket 7, and an output shaft 8 of the pneumatic driving assembly 5 is connected with the upper end of the valve rod 4; a valve cage 9 is arranged on the valve seat 2, a window 10 is arranged on the valve cage 9, and the window 10 communicates the fluid inlet with the fluid outlet; the lower end of the valve cage 9 is in sealing contact with the valve seat 2, and the upper end extends into the fluid flow channel 6; a closing-in 11 is arranged at the lower end of a windowing position 10 of the valve cage 9, a sealing part 12 in sealing fit with the valve seat 2 is arranged at the bottom of the valve core 3, and a throttling part 13 in sealing fit with the closing-in 11 of the valve cage 9 is arranged at the upper end of the valve core 3; the sealing part 12 comprises a frustum 14 which is in conical surface sealing fit with an opening 26 of the valve seat 2 and a sealing section 15 which extends into the valve seat 2; the upper end of the valve core 3 is connected with the bottom end of the valve rod 4. The fluid flows to the fluid outlet through the fluid inlet, when the throttle valve is closed, the throttling part 13 of the valve core 3 is sealed with the closing-in 11 position of the valve cage 9, the sealing part 12 of the valve core 3 is sealed with the valve seat 2, when the throttle valve needs to be opened, and the opening degree of the throttle valve is small, the throttling surface 16 at the closing-in 11 position of the throttling part 13 and the valve cage 9 is opened, and the upper sealing section 15 of the sealing part 12 is still positioned in the valve seat 2, namely the sealing surface 17 of the sealing part 12 and the valve seat 2 is still in a closed state, so that the erosion of the throttling surface 16 by the fluid can be effectively reduced, when the opening degree is gradually increased, the sealing section 15 of the sealing part 12 is separated from the valve seat 2, the sealing surface 17 is also opened, at the moment, the fluid is gradually depressurized through the throttling surface 16 and the sealing. When the throttle valve is closed, the pneumatic driving assembly 5 drives the valve rod 4 to descend, the sealing section 15 of the sealing portion 12 is inserted into the valve seat 2, the sealing surface 17 is closed firstly, then the valve rod 4 is driven to descend continuously, the frustum 14 of the sealing portion 12 is matched with the conical surface of the valve seat 2 to realize sealing, the throttling portion 13 is sealed with the closing opening 11 of the valve cage 9, and the throttling surface 16 is closed. In this way, the throttle surface 16 can be effectively prevented from being washed, and the service life of the seal can be effectively prolonged.
Example 2
As another preferred embodiment of the present invention, referring to fig. 1 and 2 of the specification, the present embodiment discloses:
as shown in fig. 1, a built-in two-stage throttling pressure reducing needle type pneumatic throttle valve comprises a valve body 1, a valve seat 2, a valve core 3, a valve rod 4 and a pneumatic driving assembly 5, wherein a fluid inlet and a fluid outlet are formed in the valve body 1, a fluid flow passage 6 is formed in the valve body 1, and the fluid inlet and the fluid outlet are communicated through the fluid flow passage 6; the valve rod 4 drives the valve core 3 to lift and control the flow of the fluid flow channel 6 by matching with the valve seat 2, and the valve seat 2 is arranged in the fluid flow channel 6 and is coaxially and annularly arranged with the valve rod 4; the pneumatic driving assembly 5 is arranged at the upper end of the valve body 1 through a bracket 7, and an output shaft 8 of the pneumatic driving assembly 5 is connected with the upper end of the valve rod 4; a valve cage 9 is arranged on the valve seat 2, a window 10 is arranged on the valve cage 9, and the window 10 communicates the fluid inlet with the fluid outlet; the lower end of the valve cage 9 is in sealing contact with the valve seat 2, and the upper end extends into the fluid flow channel 6; a closing-in 11 is arranged at the lower end of a windowing position 10 of the valve cage 9, a sealing part 12 in sealing fit with the valve seat 2 is arranged at the bottom of the valve core 3, and a throttling part 13 in sealing fit with the closing-in 11 of the valve cage 9 is arranged at the upper end of the valve core 3; the sealing part 12 comprises a frustum 14 which is in conical surface sealing fit with an opening 26 of the valve seat 2 and a sealing section 15 which extends into the valve seat 2; the upper end of the valve core 3 is connected with the bottom end of the valve rod 4. The bottom of the valve body 1 is connected with a flange change buckle 18 through a bolt and a nut, the flange change buckle 18 and the bottom of the valve body 1 are sealed through a sealing gasket I19, and the flange change buckle 18 and the bottom of the valve seat 2 are sealed through a sealing gasket II 20.
The support 7 is provided with a scale 27, the output shaft 8 of the pneumatic driving mechanism is provided with a scale pointer 28, and the scale pointer 28 carries out scale indication on the scale 27. The pneumatic driving mechanism is a driving air cylinder, and an air pipe joint 29 is arranged on a cylinder body of the driving air cylinder.
Example 3
As another preferred embodiment of the present invention, referring to fig. 1-4 of the specification, the present embodiment discloses:
as shown in fig. 1, a built-in two-stage throttling pressure reducing needle type pneumatic throttle valve comprises a valve body 1, a valve seat 2, a valve core 3, a valve rod 4 and a pneumatic driving assembly 5, wherein a fluid inlet and a fluid outlet are formed in the valve body 1, a fluid flow passage 6 is formed in the valve body 1, and the fluid inlet and the fluid outlet are communicated through the fluid flow passage 6; the valve rod 4 drives the valve core 3 to lift and control the flow of the fluid flow channel 6 by matching with the valve seat 2, and the valve seat 2 is arranged in the fluid flow channel 6 and is coaxially and annularly arranged with the valve rod 4; the pneumatic driving assembly 5 is arranged at the upper end of the valve body 1 through a bracket 7, and an output shaft 8 of the pneumatic driving assembly 5 is connected with the upper end of the valve rod 4; a valve cage 9 is arranged on the valve seat 2, a window 10 is arranged on the valve cage 9, and the window 10 communicates the fluid inlet with the fluid outlet; the lower end of the valve cage 9 is in sealing contact with the valve seat 2, and the upper end extends into the fluid flow channel 6; a closing-in 11 is arranged at the lower end of a windowing position 10 of the valve cage 9, a sealing part 12 in sealing fit with the valve seat 2 is arranged at the bottom of the valve core 3, and a throttling part 13 in sealing fit with the closing-in 11 of the valve cage 9 is arranged at the upper end of the valve core 3; the sealing part 12 comprises a frustum 14 which is in conical surface sealing fit with an opening 26 of the valve seat 2 and a sealing section 15 which extends into the valve seat 2; the upper end of the valve core 3 is connected with the bottom end of the valve rod 4.
The bottom of the valve body 1 is connected with a flange change buckle 18 through a bolt and a nut, the flange change buckle 18 and the bottom of the valve body 1 are sealed through a sealing gasket I19, and the flange change buckle 18 and the bottom of the valve seat 2 are sealed through a sealing gasket II 20. A packing cavity 21 is arranged between the upper end of the valve body 1 and the valve rod 4, a packing ring 22 is arranged at the bottom in the packing cavity 21, sealing packing is arranged on the packing ring 22, and the sealing packing is sealed in the packing cavity 21 through a packing compression ring 23. The packing press ring 23 is further provided with a packing gland 25, the packing gland 25 is fixed on the valve body 1 through bolts and nuts, and the upper end of the valve rod 4 penetrates through the packing cavity 21, the packing press ring 23 and the packing gland 25 to be connected with an output shaft 8 of the pneumatic driving mechanism. The support 7 is provided with a scale 27, the output shaft 8 of the pneumatic driving mechanism is provided with a scale pointer 28, and the scale pointer 28 carries out scale indication on the scale 27. The pneumatic driving mechanism is a driving air cylinder, and an air pipe joint 29 is arranged on a cylinder body of the driving air cylinder.
As shown in fig. 3 and 4, the sealing filler includes a plurality of sealing rings 24 made of a filler woven by flexible graphite strips or flexible graphite through mould pressing, each sealing ring 24 is provided with a radial 45-degree opening 26, the plurality of sealing rings 24 are sequentially pressed into the filler cavity 21, and the openings 26 of two adjacent layers of sealing rings 24 are sequentially staggered by 120 degrees.
Claims (7)
1. A built-in two-stage throttling pressure reducing needle type pneumatic throttling valve comprises a valve body (1), a valve seat (2), a valve core (3), a valve rod (4) and a pneumatic driving assembly (5), wherein a fluid inlet and a fluid outlet are formed in the valve body (1), a fluid flow passage (6) is formed in the valve body (1), and the fluid inlet and the fluid outlet are communicated through the fluid flow passage (6); the valve rod (4) drives the valve core (3) to lift and control the flow of the fluid flow channel (6) by matching with the valve seat (2), and the valve seat (2) is arranged in the fluid flow channel (6) and is coaxially and annularly arranged with the valve rod (4); the pneumatic driving assembly (5) is installed at the upper end of the valve body (1) through a support (7), and an output shaft (8) of the pneumatic driving assembly (5) is connected with the upper end of the valve rod (4); the method is characterized in that: a valve cage (9) is arranged on the valve seat (2), a window (10) is arranged on the valve cage (9), and the window (10) is used for communicating the fluid inlet with the fluid outlet; the lower end of the valve cage (9) is in sealing contact with the valve seat (2), and the upper end of the valve cage extends into the fluid flow channel (6); a closing-in part (11) is arranged at the lower end of the position of the windowing (10) of the valve cage (9), a sealing part (12) which is in sealing fit with the valve seat (2) is arranged at the bottom of the valve core (3), and a throttling part (13) of which the bottom is in sealing fit with the closing-in part (11) of the valve cage (9) is arranged at the upper end of the valve core (3); the sealing part (12) comprises a frustum (14) which is in conical surface sealing fit with the opening (26) of the valve seat (2) and a sealing section (15) which extends into the valve seat (2); the upper end of the valve core (3) is connected with the bottom end of the valve rod (4).
2. The built-in two-stage throttling pressure reducing needle type pneumatic throttling valve as claimed in claim 1, characterized in that: the bottom of the valve body (1) is connected with a flange change buckle (18) through a bolt and a nut, the flange change buckle (18) is sealed with the bottom of the valve body (1) through a sealing gasket I (19), and the flange change buckle (18) is sealed with the bottom of the valve seat (2) through a sealing gasket II (20).
3. The built-in two-stage throttling pressure reducing needle type pneumatic throttling valve as claimed in claim 1 or 2, wherein: be provided with packing chamber (21) between valve body (1) upper end and valve rod (4), the bottom is provided with packing ring (22) in packing chamber (21), is provided with the sealing filler on packing ring (22), the sealing filler passes through packing clamping ring (23) and seals in packing chamber (21).
4. The built-in two-stage throttling pressure reducing needle type pneumatic throttling valve as claimed in claim 3, characterized in that: the sealing filler comprises a plurality of sealing rings (24) which are made of fillers woven by flexible graphite strips or flexible graphite through mould pressing, each sealing ring (24) is provided with a radial 45-degree opening (26), the sealing rings (24) are pressed into the filler cavity (21) in sequence, and the openings (26) of the two adjacent layers of sealing rings (24) are staggered by 120 degrees in sequence.
5. The built-in two-stage throttling pressure reducing needle type pneumatic throttling valve as claimed in claim 3, characterized in that: the pneumatic valve is characterized in that a packing gland (25) is further arranged on the packing ring (23), the packing gland (25) is fixed on the valve body (1) through a bolt and a nut, and the upper end of the valve rod (4) penetrates through the packing cavity (21), the packing ring (23) and the packing gland (25) to be connected with an output shaft (8) of the pneumatic driving mechanism.
6. The built-in two-stage throttling pressure reducing needle type pneumatic throttling valve as claimed in claim 1 or 2, wherein: the pneumatic scale is characterized in that a scale (27) is arranged on the support (7), a scale pointer (28) is installed on an output shaft (8) of the pneumatic driving mechanism, and the scale pointer (28) performs scale indication on the scale (27).
7. The built-in two-stage throttling pressure reducing needle type pneumatic throttling valve as claimed in claim 1 or 2, wherein: the pneumatic driving mechanism is a driving air cylinder, and an air pipe connector (29) is arranged on a cylinder body of the driving air cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021043488.3U CN212509541U (en) | 2020-06-09 | 2020-06-09 | Pneumatic throttle valve with built-in two-stage throttling pressure reducing needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021043488.3U CN212509541U (en) | 2020-06-09 | 2020-06-09 | Pneumatic throttle valve with built-in two-stage throttling pressure reducing needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212509541U true CN212509541U (en) | 2021-02-09 |
Family
ID=74394476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021043488.3U Active CN212509541U (en) | 2020-06-09 | 2020-06-09 | Pneumatic throttle valve with built-in two-stage throttling pressure reducing needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212509541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU213889U1 (en) * | 2021-07-19 | 2022-10-04 | Общество с ограниченной ответственностью "ИРБИКОМ" | THROTTLE WAFER WITH VARIABLE BORE SECTION |
-
2020
- 2020-06-09 CN CN202021043488.3U patent/CN212509541U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU213889U1 (en) * | 2021-07-19 | 2022-10-04 | Общество с ограниченной ответственностью "ИРБИКОМ" | THROTTLE WAFER WITH VARIABLE BORE SECTION |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201902656U (en) | Hydraulic driving device of flat plate gate valve under seawater | |
| EP1350007B1 (en) | Device for an opening in an outer sleeve of a sleeve valve and a method for the assembly of a sleeve valve | |
| CN109139963B (en) | Special linkage control ball valve for coal bed gas | |
| CN212509541U (en) | Pneumatic throttle valve with built-in two-stage throttling pressure reducing needle | |
| CN203336001U (en) | Hydraulic drive flat valve with manually-closing device | |
| CN112503186B (en) | Valve for double-sealing petroleum pipeline | |
| CN212480325U (en) | Be applied to choke valve of rotatory direction ground instruction downloading device | |
| CN203808914U (en) | Concentric double-pipe gas injection wellhead device | |
| CN201180511Y (en) | Gas injection, oil extraction shaft mouth apparatus | |
| CA2792475C (en) | System for conducting well tests | |
| CN109237062B (en) | Hydraulic gate valve easy to debug | |
| CN208237108U (en) | The underwater flat gate valve of subsea tree | |
| CN106764011A (en) | Underwater hydraulic controls the executing agency of ball valve | |
| CN201326750Y (en) | Triple eccentric high-pressure metal seal butterfly valve | |
| CN206429231U (en) | Fireflood igniting wellhead assembly | |
| CN210531618U (en) | Pneumatic stop valve for high-pressure oxygen | |
| CN203009855U (en) | Internal-pressure self-sealing type valve cover stop valve | |
| CN210716044U (en) | Electric gate valve for high-pressure gas pipeline | |
| CN204140915U (en) | Gate valve | |
| CN201795051U (en) | O-shaped ring sealing valve | |
| CN218150865U (en) | Plug valve for petroleum drilling | |
| CN218971158U (en) | Large-drift-diameter ultrahigh-pressure sulfur-resistant wellhead device | |
| CN208619827U (en) | A kind of hydraulic unit driver of underwater flat gate valve | |
| CN218816319U (en) | Ultrahigh-pressure sulfur-resistant Christmas tree | |
| CN213871191U (en) | Improved structure of high-pressure floating plate valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220421 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China Petroleum Group Chuan Qing Drilling Engineering Co., Ltd. Address before: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee before: CHINA NATIONAL PETROLEUM Corp. Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Patentee before: DRILLING & PRODUCTION ENGINEERING TECHNOLOGY RESEARCH INSTITUTE OF CNPC CHUANQING DRILLING EXPLORATION Co. |
|
| TR01 | Transfer of patent right |