CN209261952U - A kind of Quick closing valve for steam turbine control oil circuit relief valve - Google Patents
A kind of Quick closing valve for steam turbine control oil circuit relief valve Download PDFInfo
- Publication number
- CN209261952U CN209261952U CN201920050797.4U CN201920050797U CN209261952U CN 209261952 U CN209261952 U CN 209261952U CN 201920050797 U CN201920050797 U CN 201920050797U CN 209261952 U CN209261952 U CN 209261952U
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- valve
- valve opening
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- piston section
- steam turbine
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- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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- Control Of Turbines (AREA)
Abstract
The utility model discloses a kind of Quick closing valve for steam turbine to control oil circuit relief valve, valve opening one is machined on valve body, valve opening two and oil duct, valve opening one is connected to oil inlet, spool includes valve rod, first piston section and second piston section, first piston section is located at oil inlet, end cap is coaxially fixedly installed with valve opening one on valve body, one end of valve rod is equipped with handle, the first spring is installed between end cap and the adjacent end face of first piston section on valve rod, valve rod has cone segments close to one end of valve opening two, second piston section carries out sliding support to cone segments, tripping body is movably provided in valve opening two, body of threading off includes cone-shaped flange, cone-shaped flange both ends are respectively equipped with upper connecting rod and lower connecting rod, the small end end face of cone-shaped flange big end outer circle and cone segments is engaged；Upper connecting rod is equipped with screw thread and is combined in guide post, and guide post slide fit is installed in valve opening two, is installed with second spring between cone-shaped flange and two bottom of valve opening dress on lower connecting rod.
Description
Technical field
The utility model relates to steam turbine technology field, specially a kind of Quick closing valve for steam turbine controls oil circuit relief valve.
Background technique
Quick-closing valve, also referred to as main inlet throttle-stop valve are the main closing organs between major steam line and steam turbine, in the state of emergency
The steam turbine of lower cutting into vapour, make unit quick shutdown, with reach protection unit purpose.
Quick-closing valve is made of valve body part and oil cylinder part.In the process of running, quick-closing valve overcomes spring by speed pass oil
Resistance keep it turning on.When speed closes oily decompression, under the force of a spring, in-oil cylinder piston plate can be disengaged with piston, speed
It closes oil to communicate with oil discharge outlet, speed is made to close oily moment venting, piston plate and valve rod, main valve dish are pushed to closed position to cutting
Steam turbine into vapour, make unit quick shutdown.The quick-closing valve of usual situation tubine is designed with dual closing device, works as steamer
When the revolving speed of machine is more than safe speed of rotation, is opened first by velocity sensor and electric control gear control solenoid valve and speed is closed oil circuit and returned
Oil-piping connection makes speed close oily decompression, makes steam turbine quick shutdown；When solenoid valve exception, there are also mechanical release devices, in vapour
When turbine revolving speed reaches preset mechanical overspeed protection control tripping revolving speed, flyball on turbine rotor hits to oil circuit because of the effect of centrifugal force
The guide post of relief valve, guide post drives release lever movement, so that piston rod is opened, high-pressure oil passage connection oil return line is let out in valve
Pressure, while to be connected in parallel on the steam turbine of oil circuit into the pressure oil also pressure release of vapour quick-closing valve, quick-closing valve loses oil pressure, executing agency
Movement turns off turbine admission valve, to achieve the purpose that Steam Turbine Over-speed Accident tripping is shut down；Existing relief valve, which exists, to be adjusted
Inconvenience, the big sensitivity of running resistance is low, and relief valve also automatically resets after flyball reset, the disadvantage of safety difference.
Summary of the invention
The purpose of this utility model is to provide a kind of Quick closing valve for steam turbine to control oil circuit relief valve, has structure letter
Single, apart from easy to adjust, high sensitivity has the advantages that self-locking function, solves the problems of the prior art for triggering.
To achieve the above object, the utility model provides the following technical solutions: a kind of Quick closing valve for steam turbine control oil circuit use
Relief valve, including valve body 1, spool are machined with valve opening 1, valve opening 2 14 and oil duct 27, the valve opening one on the valve body 1
15 are connected to the oil duct 27, and the valve opening 1 is mutually perpendicular to and is connected to the valve opening 2 14, on the valve body 1 with it is described
The connection of valve opening 1 is equipped with oil inlet 7, and the spool includes 8 He of first piston section that valve rod 6 and diameter are greater than the valve rod 6
The sealing of second piston section 9, the first piston section 8 and the second piston section 9 and the valve opening 1 is slidably matched, and described the
One piston section 8 is located at the oil inlet 7, and the second piston section 9 closes on the valve opening 2 14, on the valve body 1 with it is described
Valve opening 1 is coaxially fixedly installed with end cap 4, and the valve rod 6 is through the end cap 4 and extends one end outside the valve body 1
Handle 2 is installed, is installed with the first bullet between the end cap 4 and the adjacent end face of the first piston section 8 on the valve rod 6
Spring 5, the valve rod 6 have cone segments 10,9 pairs of the second piston section cone segments 10 close to one end of the valve opening 2 14
Sliding support is carried out, tripping body is movably provided in the valve opening 2 14, the tripping body includes cone-shaped flange 18, the taper
18 both ends of flange are respectively equipped with upper connecting rod 17 and lower connecting rod 20, the 18 big end outer circle of cone-shaped flange and the cone segments 10
Small end end face be engaged；The upper connecting rod 17 is equipped with screw thread and is combined in guide post 11, and the guide post 11 is sliding
With being installed in the valve opening 2 14, it is filled with 2 14 bottom of valve opening in the cone-shaped flange 18 on the lower connecting rod 20
Between be installed with second spring 19.
It is further: to be coaxially provided with fabrication hole 23 on the valve body 1 with the valve opening 2 14, the lower connecting rod 20 runs through
Screw thread is equipped with positioned at the part of the fabrication hole 23 behind 2 14 bottom of valve opening and is combined with adjusting nut 21 and locking nut
22, the locking nut 22 is located at 21 outside of adjusting nut.
It is further: it is equipped with intercommunicating pore 1 between the valve opening 2 14 and the fabrication hole 23 and is connected to, the work
It is equipped with intercommunicating pore 2 29 between skill hole 23 and the oil duct 27 to be connected to, 23 open end of fabrication hole is equipped with plug screw 24.
Further: oil return flange 25 is installed in 27 open end of oil duct, and the oil return flange 25 is equipped with and the oil
The oil return interface 26 that road 27 is connected to.
Further: 17 shaft end of upper connecting rod offers straight trough 13, is installed with clamping screw in the guide post 11
12 are integrated upper connecting rod 17 and the guide post 11 locking.
It is further: to be installed with sealing ring 3 between the valve rod 6 and the end cap 4.
It is further: to be located at 2 14 two sides of valve opening on the valve body 1 and be symmetrically arranged with installation through-hole 16.
The working principle and beneficial effect of the utility model:
A kind of Quick closing valve for steam turbine control oil circuit provided by the utility model is mounted on vapour by installation through-hole with relief valve
To just, oil inlet is in parallel with the pressure oil pipeline of quick-closing valve for the center for making guide post on turbine ontology and steam turbine tripping flyball,
When the revolving speed of steam turbine is more than to set guide post when safety value tripping flyball hits to guide post upper connecting rod is driven to make cone-shaped flange
It retreats, when the small end end face of the big end outer circle of cone-shaped flange and cone segments disengages, spool under the action of the first spring
Forward makes first piston section leave oil inlet position, at this moment enters valve opening together along oil duct stream for opening the pressure oil of quick-closing valve
Enter oil return interface, then along and the oil return line of oil return orifice return to fuel tank to complete the pressure release of quick-closing valve pressure oil,
Quick-closing valve loses oil pressure, and executing agency's movement turns off turbine admission valve, makes halt turbines；At this moment cone segments periphery
Prevention tripping body is contacted with the end face of cone-shaped flange big end to reset, and is prevented spool from retreating and is resetted, quick-closing valve is caused to regain pressure
Power oil make steam turbine answer turn, guarantee the safety of steam turbine；After debugging, handle is pulled to retreat spool, body of at this moment threading off
It is just resetted under second spring effect, then under the action of the first spring outside the small end end face of cone segments and cone-shaped flange big end
Circle is engaged again and relief valve is made to be in preparation work state；
The relief valve of the utility model by be set to the rotation upper connecting rod that can be convenient of straight trough of upper connecting rod shaft end come
Guide post is adjusted with the screwing length of upper connecting rod to adjust at a distance between guide post and flyball, passes through locking after regulating
Upper connecting rod and guide post locking are integrated by bolt, it is ensured that relief valve can be opened effectively；By being set on lower connecting rod
The small end end face contact length of adjustment cone-shaped flange big end outer circle and cone segments that adjusting nut can be convenient, has relief valve
Suitable sensitivity completes being locked for adjusting nut with locking nut and adjusting nut collective effect, guarantees relief valve spirit
The stabilization of sensitivity.
Valve opening two is connected to by the relief valve of the utility model by intercommunicating pore one and intercommunicating pore two with oil duct, on the one hand may be used
To provide lubrication for guide post and tripping each component of body, on the other hand make guide post internal and external pressure balance, keeps tripping body movement suitable
Smooth resistance is small, guarantees the sensitive stabilization of the work of relief valve.
Therefore the relief valve of the utility model has structure simple, good excellent of mounting and adjusting convenience, high sensitivity, stability
Point.
Detailed description of the invention
Fig. 1 is schematic diagram when the utility model structure is closed.
Fig. 2 is schematic diagram when the utility model structure is opened.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of Quick closing valve for steam turbine controls oil circuit relief valve, including valve body 1, spool is processed on valve body 1
There are valve opening 1, valve opening 2 14 and oil duct 27, valve opening 1 is connected to oil duct 27, and valve opening 1 and valve opening 2 14 are mutually perpendicular to
And be connected to, it is connected on valve body 1 with valve opening 1 and is equipped with oil inlet 7, spool includes first that valve rod 6 and diameter are greater than valve rod 6
Piston section 8 and second piston section 9, first piston section 8 and second piston section 9 are slidably matched with the sealing of valve opening 1, first piston
Section 8 is located at oil inlet 7, and second piston section 9 closes on valve opening 2 14, on valve body 1 with valve opening 1 is coaxial is fixedly installed with end cap
4, valve rod 6, which runs through end cap 4 and extends one end outside valve body 1, is equipped with handle 2, is located at end cap 4 and first piston on valve rod 6
The first spring 5 is installed between the adjacent end face of section 8, valve rod 6 has cone segments 10, second piston section close to one end of valve opening 2 14
9 pairs of cone segments 10 carry out sliding support, tripping body are movably provided in valve opening 2 14, tripping body includes cone-shaped flange 18, taper
18 both ends of flange are respectively equipped with upper connecting rod 17 and lower connecting rod 20, the small end end of cone-shaped flange 18 big end outer circle and cone segments 10
Face contact cooperation；Upper connecting rod 17 is equipped with screw thread and is combined in guide post 11, and 11 slide fit of guide post is installed in valve opening 2 14
It is interior, second spring 19 is installed between cone-shaped flange 18 and 2 14 bottom of valve opening dress on lower connecting rod 20.
It is preferred: fabrication hole 23 to be coaxially provided on valve body 1 with valve opening 2 14, after lower connecting rod 20 runs through 2 14 bottom of valve opening
Screw thread is equipped with positioned at the part of fabrication hole 23 and is combined with adjusting nut 21 and locking nut 22, and locking nut 22, which is located at, adjusts spiral shell
21 outside of mother.
It is preferred: it is equipped with intercommunicating pore 1 between valve opening 2 14 and fabrication hole 23 and is connected to, fabrication hole 23 and oil duct 27
Between be equipped with intercommunicating pore 2 29 be connected to, 23 open end of fabrication hole is equipped with plug screw 24.
Preferred: oil return flange 25 is installed in 27 open end of oil duct, and oil return flange 25 is equipped with the oil return being connected to oil duct 27
Interface 26.
Preferred: 17 shaft end of upper connecting rod offers straight trough 13, and clamping screw 12 is installed in guide post 11 by upper connection
Bar 17 is integrated with the locking of guide post 11.
It is preferred: sealing ring 3 is installed between valve rod 6 and end cap 4.
It is preferred: to be located at 2 14 two sides of valve opening on valve body 1 and be symmetrically arranged with installation through-hole 16.
A kind of Quick closing valve for steam turbine control oil circuit relief valve provided by the utility model passes through installation through-hole as shown in Figure 2
16 are mounted on turbine body the center for making guide post 11 and steam turbine tripping flyball (not shown) to just, oil inlet 7 and speed
The pressure oil pipeline for closing valve is in parallel, when the revolving speed of steam turbine is more than guide post when setting safety value tripping flyball hits to guide post 11
11 drive upper connecting rods 17 retreat cone-shaped flange 18, when the big end outer circle of cone-shaped flange 18 and the small end end face of cone segments 10 are de-
When from contact, spool Forward makes first piston section 8 leave 7 position of oil inlet under the action of the first spring 5, at this moment for opening
The pressure oil of quick-closing valve enter valve opening 1 and along oil duct 27 flow into oil return interface 26 (as shown by the arrows in Figure 2), then edge with
The oil return line (not shown) that oil return interface 26 is connected to returns to fuel tank (not shown) to complete quick-closing valve (not shown) pressure oil
Pressure release, quick-closing valve loses oil pressure, and executing agency's movement turns off turbine admission valve, makes halt turbines；At this moment cone segments
10 peripheries contact prevention tripping body with the end face of 18 big end of cone-shaped flange and reset, and preventing spool from retreating reset leads to quick-closing valve weight
It is new obtain pressure oil and answer steam turbine turn, guarantee the safety of steam turbine；After debugging, handle 2 is pulled to retreat spool, this
When tripping body second spring 19 effect under just reset, then under the action of the first spring 5 the small end end face of cone segments 10 with
18 big end outer circle of cone-shaped flange is engaged again and relief valve is made to be in preparation work state (as shown in Figure 1).
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of Quick closing valve for steam turbine controls oil circuit relief valve, including valve body (1), spool, valve is machined on the valve body (1)
Hole one (15), valve opening two (14) and oil duct (27), the valve opening one (15) are connected to the oil duct (27), it is characterised in that:
The valve opening one (15) is mutually perpendicular to and is connected to the valve opening two (14), on the valve body (1) even with the valve opening one (15)
Logical to be equipped with oil inlet (7), the spool includes valve rod (6) and diameter is greater than the first piston section (8) and the of the valve rod (6)
Two piston sections (9), the first piston section (8) and the second piston section (9) are slidably matched with the valve opening one (15) sealing,
The first piston section (8) is located at the oil inlet (7), and the second piston section (9) closes on the valve opening two (14), described
It is coaxially fixedly installed with end cap (4) on valve body (1) with the valve opening one (15), the valve rod (6) is through the end cap (4) and prolongs
It stretches out the external one end of the valve body (1) to be equipped with handle (2), the end cap (4) and described first is located on the valve rod (6)
It is installed between the adjacent end face of piston section (8) the first spring (5), the valve rod (6) has close to one end of the valve opening two (14)
Have cone segments (10), the second piston section (9) carries out sliding support to the cone segments (10), lives in the valve opening two (14)
Dynamic to be installed with tripping body, the tripping body includes cone-shaped flange (18), and cone-shaped flange (18) both ends are respectively equipped with connection
Bar (17) and lower connecting rod (20), cone-shaped flange (18) the big end outer circle is contacted with the small end end face of the cone segments (10) matches
It closes；The upper connecting rod (17) is equipped with screw thread and is combined in guide post (11), and guide post (11) slide fit is installed in institute
It states in valve opening two (14), on the lower connecting rod (20) between the cone-shaped flange (18) and the valve opening two (14) bottom dress
It is installed with second spring (19).
2. a kind of Quick closing valve for steam turbine according to claim 1 controls oil circuit relief valve, it is characterised in that: the valve body
(1) it is coaxially provided with fabrication hole (23) on the valve opening two (14), the lower connecting rod (20) runs through valve opening two (14) bottom
Part behind portion positioned at the fabrication hole (23) is equipped with screw thread and is combined with adjusting nut (21) and locking nut (22), the lock
Tight nut (22) is located on the outside of the adjusting nut (21).
3. a kind of Quick closing valve for steam turbine according to claim 2 controls oil circuit relief valve, it is characterised in that: the valve opening
It is equipped with intercommunicating pore one (28) between two (14) and the fabrication hole (23) to be connected to, the fabrication hole (23) and the oil duct
(27) it is equipped with intercommunicating pore two (29) between to be connected to, fabrication hole (23) open end is equipped with plug screw (24).
4. a kind of Quick closing valve for steam turbine according to claim 1 controls oil circuit relief valve, it is characterised in that: the oil duct
(27) open end installation oil return flange (25), the oil return flange (25) are equipped with the oil return interface being connected to the oil duct (27)
(26).
5. a kind of Quick closing valve for steam turbine according to claim 1 controls oil circuit relief valve, it is characterised in that: the upper company
Extension bar (17) shaft end offers straight trough (13), be installed on the guide post (11) clamping screw (12) by upper connecting rod (17) with
Guide post (11) locking is integrated.
6. a kind of Quick closing valve for steam turbine according to claim 1 controls oil circuit relief valve, it is characterised in that: the valve rod
(6) it is installed between the end cap (4) sealing ring (3).
7. a kind of Quick closing valve for steam turbine according to claim 1 controls oil circuit relief valve, it is characterised in that: the valve body
(1) it is located at valve opening two (14) two sides on and is symmetrically arranged with installation through-hole (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920050797.4U CN209261952U (en) | 2019-01-14 | 2019-01-14 | A kind of Quick closing valve for steam turbine control oil circuit relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920050797.4U CN209261952U (en) | 2019-01-14 | 2019-01-14 | A kind of Quick closing valve for steam turbine control oil circuit relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209261952U true CN209261952U (en) | 2019-08-16 |
Family
ID=67584655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920050797.4U Active CN209261952U (en) | 2019-01-14 | 2019-01-14 | A kind of Quick closing valve for steam turbine control oil circuit relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209261952U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023005861A1 (en) * | 2021-07-26 | 2023-02-02 | 浙江飞越机电有限公司 | Pressure relief valve state detection structure for electric hydraulic pipe-machining tool |
-
2019
- 2019-01-14 CN CN201920050797.4U patent/CN209261952U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023005861A1 (en) * | 2021-07-26 | 2023-02-02 | 浙江飞越机电有限公司 | Pressure relief valve state detection structure for electric hydraulic pipe-machining tool |
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