CN215568344U - Lever pressure reducing valve - Google Patents
Lever pressure reducing valve Download PDFInfo
- Publication number
- CN215568344U CN215568344U CN202120449073.4U CN202120449073U CN215568344U CN 215568344 U CN215568344 U CN 215568344U CN 202120449073 U CN202120449073 U CN 202120449073U CN 215568344 U CN215568344 U CN 215568344U
- Authority
- CN
- China
- Prior art keywords
- valve
- lever
- spring
- pressure reducing
- seat
- 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
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
The utility model provides a lever pressure reducing valve, which comprises an upper valve cover, a middle cavity, a lower cavity and a base, wherein a piston cylinder is fixedly arranged in the middle cavity, a valve rod is arranged in the middle cavity and the lower cavity, a valve seat is arranged at the bottom of the valve rod, the valve seat is connected with the base through an auxiliary spring, a diaphragm assembly is arranged at the upper end of the piston cylinder, a left lever and a right lever are arranged on two sides of the top end of the valve rod, lower spring seats are arranged at the upper ends of the left lever and the right lever, the outer ends of the left lever and the right lever are respectively positioned by a fulcrum shaft, the left lever and the right lever rotate around the fulcrum shaft, a main spring is fixedly arranged at the upper end of the lower spring seat, the main spring is vertically arranged in the upper valve cover, the upper end of the main spring is fixedly connected with the upper spring seat, and an adjusting screw rod is inserted into the upper part of the upper spring seat; the utility model arranges a lever structure in the valve body, realizes the amplification effect of force not less than 6 times, excites the spring to deform, further generates the movement of the valve rod component, drives the valve seat to move, hinders and weakens the pressure change, and stabilizes the outlet pressure.
Description
Technical Field
The utility model relates to the field of pressure reducing valves, in particular to a lever pressure reducing valve.
Background
The pressure reducing valve is a common pressure reducing and stabilizing device in engineering technology, the pressure behind the valve of the pressure reducing valve is generally controlled to be about 0.5 time of the pressure in front of the valve, and the running condition of a pipeline can be deteriorated due to the excessively low pressure behind the valve. In engineering applications, such conditions occur: the upstream pressure is 0.6MPa, the pressure of the downstream is required to be reduced to 400-600Pa, and the pressure deviation is +/-10%. The pressure difference before and after the valve has a large variation range, the accuracy of the valve is difficult to control due to the excessively low pressure after the valve, and the small variation of the upstream pressure is not enough to cause the displacement variation of the feedback device, so that the variation of the downstream pressure is directly caused to exceed the deviation +/-10%. In order to meet the working condition requirement, a special pressure reducing valve needs to be designed, and the low-pressure change behind the valve is amplified to the normal working range of the pressure feedback device to ensure the stability of the pressure at the outlet.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lever pressure reducing valve.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a lever pressure reducing valve is characterized by comprising an upper valve cover, a middle cavity, a lower cavity and a base which are sequentially arranged from top to bottom, wherein a piston cylinder is fixedly arranged in the middle cavity, a valve rod is vertically arranged in the middle of the middle cavity and the lower cavity, a valve seat is arranged at the bottom of the valve rod, the valve seat is connected with the base through an auxiliary spring, a diaphragm assembly is arranged at the upper end of the piston cylinder, a left lever and a right lever are respectively arranged on two sides of the top end of the valve rod, a lower spring seat is arranged at the upper ends of the left lever and the right lever, the outer ends of the left lever and the right lever are respectively positioned through a fulcrum shaft, the left lever and the right lever rotate around the fulcrum shaft, a main spring is fixedly arranged at the upper end of the lower spring seat, the main spring is vertically arranged in the upper valve cover, the upper end of the main spring is fixedly connected with the upper spring seat, and an adjusting screw rod is inserted into the upper portion of the upper spring seat, the upper part of the adjusting screw rod protrudes out of the top of the upper valve cover, and the height of the upper spring seat is adjusted by rotating the adjusting screw rod.
Furthermore, an upper pressure plate is arranged at the upper end of the piston cylinder.
Furthermore, the upper portion, the middle part and the lower part of the piston cylinder are respectively sleeved with a first O-shaped ring, a second O-shaped ring and a third O-shaped ring, and the piston cylinder is tightly matched with the inner wall of the valve body through the first O-shaped ring, the second O-shaped ring and the third O-shaped ring.
Furthermore, the diaphragm assembly comprises an upper pressure plate, a diaphragm and a gasket which are sequentially arranged from top to bottom, the gasket is arranged on the step surface of the upper portion of the valve rod, and the diaphragm is tightly pressed and locked through the upper pressure plate and the threads on the upper portion of the valve rod.
Furthermore, the cross section of the diaphragm is of a wave structure, the upper pressure plate and the diaphragm are matched and positioned through the wave structure,
further, the upper end of going up the valve gap is equipped with the protective sheath, the upper end of protective sheath is the arc epirelief.
Furthermore, the upper portion of valve rod is equipped with the shaft hole, the shaft hole runs through and is equipped with the round pin axle, the waist type hole in left lever and right lever inner is passed at the both ends of round pin axle.
Further, the relief pressure valve includes at least two manometer, the manometer detects the pressure of cavity and the pipeline junction down.
The valve body is internally provided with the lever structure, so that the force amplification effect of not less than 6 times is realized, the spring is excited to deform, the valve rod assembly is further moved to drive the valve seat to move, the pressure change is hindered and weakened, and the outlet pressure is stabilized; the diaphragm is designed into a wave-shaped structure, and the transverse stretching of the rubber diaphragm cannot be generated in the process of vertical displacement of the valve rod through the abundant deformation of the wave node, so that the risk that the rubber diaphragm is pulled apart is avoided, and the service life of the diaphragm is prolonged; the valve rod and the lever are positioned through the pin shaft, the replacement and the maintenance are simple and convenient, the phenomena of less installation, wrong installation, neglected installation and the like when all parts are installed one by one on a line are avoided, and the installation precision is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a diaphragm assembly of the present invention;
fig. 3 is a schematic view of the structure of the valve stem of the present invention.
Reference numerals:
1 base, 2 valve bodies, 3 pairs of springs, 4 valve seats, 5 valve rods, 6 first O-shaped rings,
7 second O-shaped ring, 8 third 0-shaped ring, 9 piston cylinder, 10 diaphragm, 11 upper pressure plate,
12 left lever, 13 lower spring seat, 14 main spring, 15 upper valve cover, 16 protective sleeve,
17 adjusting screw rods, 18 upper spring seats, 19 pin shafts, 20 right levers, 21 fulcrum shafts,
22 cavity, 23 pressure gauge, 24 gasket.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model discloses a lever pressure reducing valve, which comprises an upper valve cover 15, a middle cavity 22, a lower cavity and a base 1 which are sequentially arranged from top to bottom as shown in figure 1, wherein a piston cylinder 9 is fixedly arranged in the middle cavity 22, a valve rod 5 is vertically arranged in the middle of the middle cavity 22 and the lower cavity, a valve seat 4 is arranged at the bottom of the valve rod 5, the valve seat 4 is connected with the base 1 through an auxiliary spring 3, a diaphragm assembly is arranged at the upper end of the piston cylinder 9, a left lever 12 and a right lever 20 are respectively arranged on two sides of the top end of the valve rod 5, the outer ends of the left lever 12 and the right lever 20 are respectively positioned by a fulcrum shaft 21, and the left lever 12 and the right lever 20 rotate around the fulcrum shaft 21.
The upper ends of the left lever 12 and the right lever 20 are provided with a lower spring seat 13, the upper end of the lower spring seat 13 is fixedly provided with a main spring 14, the main spring 14 is vertically arranged in an upper valve cover 15, the upper end of the main spring 14 is fixedly connected with an upper spring seat 18, the upper part of the upper spring seat 18 is inserted into an adjusting screw rod 17, the upper part of the adjusting screw rod 17 protrudes out of the top of the upper valve cover 15, and the height of the upper spring seat 18 is adjusted by rotating the adjusting screw rod 17.
The upper end of the piston cylinder 9 is provided with an upper pressure plate 11, the upper portion, the middle portion and the lower portion of the piston cylinder 9 are respectively sleeved with a first O-shaped ring 6, a second O-shaped ring 7 and a third O-shaped ring 8, and the piston cylinder 9 is tightly matched with the inner wall of the valve body 2 through the first O-shaped ring 6, the second O-shaped ring 7 and the third O-shaped ring 8.
As shown in fig. 2, the diaphragm assembly includes an upper pressure plate 11, a diaphragm 10 and a gasket 24, which are sequentially arranged from top to bottom, the gasket 24 is arranged on a step surface of an upper portion of the valve rod 5, the diaphragm 10 is tightly locked by the upper pressure plate 11 and threads on the upper portion of the valve rod 5, preferably, the cross section of the diaphragm 10 is in a wave structure, and the upper pressure plate 11 and the diaphragm 10 are cooperatively positioned by the wave structure.
The upper end of the upper valve cover 15 is provided with a protective sleeve 16, and the upper end of the protective sleeve 16 is arc-shaped and protrudes upwards.
As shown in fig. 1 and 3, an axle hole is formed in the upper portion of the valve rod 5, a pin 19 penetrates through the axle hole, two ends of the pin 19 penetrate through kidney-shaped holes at the inner ends of the left lever 12 and the right lever 20 and are fixed by a cotter pin, when the valve rod 5 makes a linear motion with a certain stroke up and down, the valve rod 5 drives the pin 19 to slide in the kidney-shaped holes of the left lever 12 and the right lever 20, the lever rotates around the fulcrum shaft 21 at a certain angle, the main spring 14 is pressed above the left lever 12 and the right lever 20 through the lower spring seat 13 to form a lever resistance, a resistance arm L is formed by a vertical distance between an acting point and the fulcrum shaft 21, and a power arm of the left lever 12 and the right lever 20 is formed by a vertical distance (greater than or equal to 6L) between the pin 19 and the fulcrum shaft 21 of the valve rod 5.
For a certain dynamic balance state, when the outlet pressure fluctuation changes Δ P, the pressure changes to act on the diaphragm assembly through the feedback hole to generate thrust Δ F, Δ F = Δ P × Δ S (Δ S is the annular action area of the diaphragm 10), and the thrust becomes Δ F' = β Δ F = β Δ P × Δ S (β is the amplification factor = power arm/resistance arm ≥ 6) through the amplification of the lever force, so that through the amplification effect of not less than 6 times, the spring is excited to deform, the movement of the valve rod 5 assembly is generated, the valve seat 4 is driven to move, the change of Δ P is blocked and weakened, and the outlet pressure is stabilized.
The pressure reducing valve comprises at least two pressure gauges 23, and the pressure gauges 23 detect the pressure at the joint of the lower cavity and the downstream pipeline.
In implementation, an upstream pressure P1 enters an inner cavity of the valve body 2 from a valve inlet of the lever pressure reducing valve, the protective sleeve 16 is removed, the adjusting screw 17 is rotated to compress the main spring 14, the main spring 14 pushes the upper spring seat 18, the upper spring seat 18 acts on the force arms of the left lever 12 and the right lever 20, the force arms of the left lever 12 and the right lever 20 transmit the pressure to the head of the valve rod 5, the valve rod 5 drives the diaphragm assembly and the valve seat 4 to move downwards integrally, a channel of the valve seat 4 is opened, and fluid enters the lower cavity and flows to an outlet.
And one part of the fluid flowing to the outlet flows out of the valve body 2 and enters a downstream pipeline, and the other part of the gas enters the lower cavity of the diaphragm through the feedback channel, so that the outlet pressure is fed back to the lower cavity of the diaphragm 10, and the valve rod 5 is driven to generate upward thrust.
The thrust of the valve rod 5 is doubled and fed back to the spring seat through the lengthened force arm of the left and right levers 20, the spring seat pushes the main spring 14 to move upwards, the valve rod 5 moves upwards along with the valve rod 5, and the valve seat 4 moves towards the closing direction.
The force of the main spring 14 is compared with the amplified feedback force and balanced, so that a certain opening degree of the valve seat 4 is maintained, the pressure and the flow of an outlet are ensured, and after the pressure is adjusted, the nut on the adjusting screw rod 17 is rotated, the adjusting position is locked, and misoperation is prevented.
When the valve is installed, the first O-ring 6, the second O-ring 7 and the third O-ring 8 are installed firstly, then the diaphragm assembly is installed at the head of the valve rod 5, the valve rod 5 penetrates through a middle hole of the piston cylinder 9 to the bottom of the piston cylinder 9, the valve seat 4 is fastened with the bottom of the valve rod 5 through threads, the auxiliary spring 3 is pressed into a positioning shaft of the valve seat 4, and a piston cylinder 9 component is installed into a cavity of the valve body 2 from the upper part of the valve body 2.
When the quick-wear parts need to be overhauled and replaced on line, the whole pressure reducing internal part is taken out together by lifting the pin shaft 19 at the head part of the valve rod 5 or prying the groove at the edge of the piston cylinder 9, and the whole pressure reducing internal part is put into the valve body 2 after the maintenance and replacement on line.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A lever pressure reducing valve is characterized by comprising an upper valve cover, a middle cavity, a lower cavity and a base which are sequentially arranged from top to bottom, wherein a piston cylinder is fixedly arranged in the middle cavity, a valve rod is vertically arranged in the middle of the middle cavity and the lower cavity, a valve seat is arranged at the bottom of the valve rod, the valve seat is connected with the base through an auxiliary spring, a diaphragm assembly is arranged at the upper end of the piston cylinder, a left lever and a right lever are respectively arranged on two sides of the top end of the valve rod, a lower spring seat is arranged at the upper ends of the left lever and the right lever, the outer ends of the left lever and the right lever are respectively positioned through a fulcrum shaft, the left lever and the right lever rotate around the fulcrum shaft, a main spring is fixedly arranged at the upper end of the lower spring seat, the main spring is vertically arranged in the upper valve cover, the upper end of the main spring is fixedly connected with the upper spring seat, and an adjusting screw rod is inserted into the upper portion of the upper spring seat, the upper part of the adjusting screw rod protrudes out of the top of the upper valve cover, and the height of the upper spring seat is adjusted by rotating the adjusting screw rod.
2. The lever pressure reducing valve as claimed in claim 1, wherein an upper pressure plate is provided at an upper end of the piston cylinder.
3. The lever pressure reducing valve according to claim 1, wherein the piston cylinder is sleeved with a first O-ring, a second O-ring and a third O-ring at the upper part, the middle part and the lower part respectively, and the piston cylinder is tightly matched with the inner wall of the valve body through the first O-ring, the second O-ring and the third O-ring.
4. The lever pressure reducing valve according to claim 1, wherein the diaphragm assembly comprises an upper pressure plate, a diaphragm and a gasket which are sequentially arranged from top to bottom, the gasket is arranged on a step surface of the upper portion of the valve rod, and the diaphragm is tightly locked through the upper pressure plate and threads on the upper portion of the valve rod.
5. The lever pressure reducing valve as claimed in claim 4, wherein the diaphragm has a wave-shaped cross section, the upper pressure plate and the diaphragm are cooperatively positioned by the wave-shaped structure, and the upper end of the upper valve cover is provided with a protective sleeve, and the upper end of the protective sleeve is convexly curved.
6. The lever-type pressure reducing valve as claimed in claim 1, wherein the valve rod has a shaft hole formed at an upper portion thereof, and a pin shaft is inserted through the shaft hole, and both ends of the pin shaft are inserted through kidney-shaped holes formed at inner ends of the left and right levers.
7. The lever pressure reducing valve according to claim 1, wherein the pressure reducing valve comprises at least two pressure gauges for detecting a pressure at a connection of the lower chamber and the downstream pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120449073.4U CN215568344U (en) | 2021-03-02 | 2021-03-02 | Lever pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120449073.4U CN215568344U (en) | 2021-03-02 | 2021-03-02 | Lever pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215568344U true CN215568344U (en) | 2022-01-18 |
Family
ID=79838733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120449073.4U Active CN215568344U (en) | 2021-03-02 | 2021-03-02 | Lever pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215568344U (en) |
-
2021
- 2021-03-02 CN CN202120449073.4U patent/CN215568344U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107061834B (en) | Built-in driving axial-flow type regulating valve | |
| CN105889159A (en) | Hydraulic system with ultra-high pressure outputting capacity | |
| CN215568344U (en) | Lever pressure reducing valve | |
| CN201377587Y (en) | Valve with balanced-type valve core | |
| CN217898788U (en) | High-pressure non-valve-seat pressure balance type angular single-seat valve | |
| CN203868394U (en) | Novel extension-bar ball valve | |
| CN102797695A (en) | Cyclic protection control system and cyclic protection control method for mechanical seal | |
| CN107558967B (en) | Steady flow regulator for water injection well | |
| CN109695754B (en) | Hydraulic oil inlet valve | |
| CN107387786B (en) | Multifunctional pressure/flow control valve with good sealing performance and operation method thereof | |
| CN207406862U (en) | A kind of piston piloted reducer | |
| CN213393732U (en) | Compound direct-acting pressure reducing valve | |
| CN220204693U (en) | Bellows self-operated multifunctional pressure regulating valve | |
| CN215172342U (en) | Balanced column formula governing valve | |
| CN221003961U (en) | Safety valve pressure debugging device | |
| CN220118653U (en) | Hydrogen energy pressure reducing valve | |
| CN211649111U (en) | Vacuum isolation gate valve | |
| CN220037472U (en) | Bypass needle valve for spherical valve of pumped storage hydropower station | |
| CN212273238U (en) | Pilot-operated type pneumatic control angle seat valve | |
| CN218863319U (en) | Light-weight compact type double-spring high-pressure reducer | |
| CN211202961U (en) | Pneumatic control integrated valve | |
| CN101469780A (en) | Pneumatic flange type high temperature resistant bellows gate valve | |
| CN111058949B (en) | Pressure-controlled oil drainage valve for starting of turboshaft engine and use method thereof | |
| CN209671299U (en) | A kind of hydraulic inlet valve of pipe robot | |
| CN115111414A (en) | High-precision pilot pressure reducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A lever pressure reducing valve Granted publication date: 20220118 Pledgee: Agricultural Bank of China Limited Shanghai Yangtze River Delta Integrated Demonstration Zone Sub branch Pledgor: SHANGHAI IVCO VALVE CO.,LTD. Registration number: Y2024310000185 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |