CN205841888U - The pressure limiting valve of relief valve is installed - Google Patents
The pressure limiting valve of relief valve is installed Download PDFInfo
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- CN205841888U CN205841888U CN201620702821.4U CN201620702821U CN205841888U CN 205841888 U CN205841888 U CN 205841888U CN 201620702821 U CN201620702821 U CN 201620702821U CN 205841888 U CN205841888 U CN 205841888U
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Abstract
This utility model relates to valve field, disclose the pressure limiting valve being provided with relief valve, it includes pressure limiting valve body (3) and pressure limiting piston (4), relief valve includes safe piston (1) and spring (2), pressure limiting piston (4) is provided with the first hole (41), passage (411) it is provided with in first hole (41), safe piston (1) is provided with the first sealing ring (11), spring (2) promotes safe piston (1) to stretch in the first hole (41), the air pressure increased in work inlet chamber promotes safe piston (1) to skid off the first hole (41) and outward and connects work inlet chamber and passage (411).This utility model makes safe piston overcome spring force to move up under gas pressure, opens the air inlet working chamber of pressure limiting valve and the connection of passage, and the design can adjust air pressure after pressure limiting valve lost efficacy in time, improves traffic safety.
Description
Technical field
This utility model relates to valve field, has particularly related to be provided with the pressure limiting valve of relief valve.
Background technology
Multiloop protection valve is to be arranged by certain relation by multiple pressure limiting check-valves (usual four), suitably addition of remaining
Functional entity (such as pressure limiting valve, relief valve etc.), to realize the branch supply of source of the gas in commercial car brake system, it is ensured that respectively brake back
The independent normal work in road.When compressed air is from air drier input multiloop protection valve, gas circuit is by four pressure limiting check-valves
It is divided into four tunnels, is respectively outputted to service brake the Ith loop, the IIth loop, parking brake circuit, auxiliary braking and auxiliary gas and returns
Road etc..But, the multiloop protection valve sold at present, the most all in driving brake circuit, pressure transducer is installed, when many
The air pressure of loop protection valve service brake loop output can produce alarm signal when transfiniting, and improves traffic safety.And stopping brake
Etc. lacking safety precautions in gas circuit, the most built-in pressure limiting valve lost efficacy, and because of unprotect measure in pipeline, gases at high pressure just enter
Enter brakes, affect braking effect and traffic safety.Therefore the gas circuit such as stopping brake of multiloop protection valve needs to design gas
Pressure protection mechanism.Air pressure can be adjusted in time after multiloop protection valve pressure limiting valve loses efficacy, improve traffic safety.
Summary of the invention
This utility model is for the shortcoming of unprotect measure after losing efficacy in prior art, it is provided that be provided with the limit of relief valve
Pressure valve.
In order to solve above-mentioned technical problem, this utility model is addressed by following technical proposals:
The pressure limiting valve of relief valve is installed, including pressure limiting valve body and the pressure limiting piston being arranged in pressure limiting valve body, also includes
Being arranged on the relief valve in the air inlet working chamber of valve body and the formation of pressure limiting piston, relief valve includes safe piston and is arranged on safety
Spring in piston, pressure limiting piston is provided with the first hole, is provided with the passage being in communication with the outside, safe piston sets in the first hole
There is the first sealing ring that the inwall with the first hole coordinates, in spring promotes safe piston to stretch into the first hole and by the first sealing ring
Partition air inlet working chamber connects with passage, and the air pressure increased in work inlet chamber promotes safe piston to resist the elastic force of spring
And make safe piston skid off outside the first hole and connect work inlet chamber and passage.Under the influence of air pressure, safe piston overpowers
Spring force moves up, and opens the air inlet working chamber of pressure limiting valve and the connection of passage, and hyperbar is directly entered greatly by ventilation
Gas, vehicle by brake or other make relief valve intracavity air pressure decline with gas, when dropping to safety valve spring set pressure, safety
Piston under spring force, is re-closing off blow vent, and pressure limiting valve recovers nominal situation, and the design can after pressure limiting valve lost efficacy
To adjust air pressure in time, improve traffic safety.
As preferably, also including screw, screw is arranged in safe piston, and screw is provided with bulge loop, and the diameter of bulge loop is big
In the diameter of spring, spring housing is located on screw, and one end of spring and the contact internal walls of safe piston, the other end of spring is with convex
Ring contacts.Make structure easy for removal and installation by the design of screw.
As preferably, one end of screw sequentially passes through safe piston and pressure limiting piston and stretching outside pressure limiting piston is stretched out in formation
Going out end, the external part of screw is provided with nut, the diameter of nut is more than the diameter of passage, the external part of nut regulation screw
Length also controls the decrement of spring.By the decrement of nut adjustable springs, thus adjust safety valve spring set pressure,
Different customer requirements can be met, practical.
As preferably, the diameter of screw is less than the diameter of passage, and screw is through passage and stretches out outside pressure limiting piston.
As preferably, valve body is provided with the second hole that axis is parallel with the axis in the first hole, and safe piston is provided with and the
The second sealing ring that two holes coordinate.By arranging of the second hole, safe piston is carried out spacing, prevent the skew of safe piston.
As preferably, safe piston includes small column and the diameter big cylinder more than the diameter of small column, the first sealing ring
Being located on the outer wall of small column, the second sealing ring is located on the outer wall of big cylinder, and spring is arranged in the inner chamber of big cylinder.Due to
The cross section product moment of small column and big cylinder, emergency valve piston overcomes spring force to move under the influence of air pressure, opens passage, knot
Structure advantages of simple.
This utility model, owing to have employed above technical scheme, has significant technique effect: under the influence of air pressure, peace
Full piston overpowers spring force moves up, and opens the air inlet working chamber of pressure limiting valve and the connection of passage, and hyperbar directly passes through
Ventilation enter air, vehicle by brake or other make relief valve intracavity air pressure decline with gas, drop to safety valve spring setting
During pressure, safe piston under spring force, is re-closing off blow vent, and pressure limiting valve recovers nominal situation, and the design is in limit
Pressure valve can adjust air pressure in time after losing efficacy, improves traffic safety.
Accompanying drawing explanation
Fig. 1 is relief valve and the structural representation of pressure limiting piston.
Fig. 2 is the structural representation of pressure limiting valve and relief valve.
Fig. 3 is view during pressure limiting valve pressure limiting work.
View when Fig. 4 is that pressure limiting valve lost efficacy, relief valve starts.
The toponym that in accompanying drawing, each number designation is referred to is as follows: 1 safe piston, 2 springs, 3 valve bodies, 4
Pressure limiting piston, 5 screws, 11 first sealing rings, 12 second sealing rings, 31 second holes, 41 first holes, 51 convex
Ring, 52 nuts, 411 passages, 101 small columns, 102 big cylinders.
Detailed description of the invention
With embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1
The pressure limiting valve of relief valve is installed, as it can be seen, include pressure limiting valve body 3 and the pressure limiting being arranged in pressure limiting valve body 3
Piston 4, also includes the relief valve being arranged in the air inlet working chamber of valve body 3 and pressure limiting piston 4 formation, and relief valve includes safe work
Plug 1 and the spring 2 being arranged in safe piston 1, the lower ending opening of safe piston 1, the inner chamber of safe piston 1 is cylinder, bullet
Spring 2 is arranged in the cylindrical cavity of safe piston 1, and pressure limiting piston 4 is provided with the first hole 41, is provided with extraneous in the first hole 41
The passage 411 of connection, safe piston 1 is provided with the first sealing ring 11 that the inwall with the first hole 41 coordinates, and spring 2 promotes peace
Cut off connecting of air inlet working chamber and passage 411 in full piston 1 stretches into the first hole 41 and by the first sealing ring 11, work into
The air pressure increased in air cavity promotes safe piston 1 resist the elastic force of spring 2 and make safe piston 1 skid off outside the first hole 41 and connect
Work inlet chamber and passage 411.
Also including that screw 5, screw 5 are arranged in safe piston 1, screw 5 is provided with bulge loop 51, and the diameter of bulge loop 51 is more than
The diameter of spring 2, spring 2 is set on screw 5, one end of spring 2 and the contact internal walls of safe piston 1, the other end of spring 2
Contacting with bulge loop 51, bulge loop 51 is to the reduction length that distance is spring 2 of safe piston 1 inner chamber bottom surface.
One end of screw 5 sequentially passes through safe piston 1 and passage 411 and the external part outside pressure limiting piston 4 is stretched out in formation,
Being provided with nut 52 on the external part of screw 5, the diameter of nut 52 is more than the diameter of passage 411, and nut 52 regulates screw 5
External part length also controls the decrement of spring 2.
The diameter of screw 5 is less than the diameter of passage 411, and screw 4 is through passage 411 and stretches out outside pressure limiting piston 4.
Valve body 3 is provided with the second hole 31 that axis is parallel with the axis in the first hole 41, and safe piston 1 is provided with and the second hole
31 the second sealing rings 12 coordinated.
Safe piston 1 includes small column 101 and the diameter big cylinder 102 more than the diameter of small column 101, the first sealing ring
On 11 outer walls being located at small column 101, the second sealing ring 12 is located on the outer wall of big cylinder 102, and spring 2 is arranged on big cylinder
In the inner chamber of 102, small column 101 is provided with the hole passed for screw 5, and screw 5 is through the hole on small column 101 and passage
Outside 411 walls stretching out pressure limiting piston 4.
Under nominal situation, air pressure inputs in the air inlet working chamber of multiloop pressure limiting valve body 3, under the influence of air pressure, and limit
Pressure assembly overcomes spring force, moves down, and closes air intake valve, plays pressure limiting effect.But when pressure limiting valve is due to foreign material or close
After the reasons such as envelope abnormity circle is damaged lost efficacy, do not have fool proof protection, easily cause the damage of pressure limiting valve.When being embodied as, peace
Full piston 1 is assemblied between pressure limiting piston 4 and valve body 3 formation by the first sealing ring 11 and the second sealing ring 12 and seals space also
Can move between pressure limiting piston 4 and valve body 3, the length of the small column 101 on safe piston 1 is less than on pressure limiting piston 4 the
The degree of depth in one hole 41.Under nominal situation, safe piston 1 slightly moves between pressure limiting piston 4 and valve body 3, and on small column 101
First sealing ring 11 is fitted with the first hole 11 all the time and cuts off the connection of passage 411 and air inlet working chamber.When air pressure raises,
Due to small column 101 and the cross section product moment of big cylinder 102 of safe piston 1, safe piston 1 is moved down by gas pressure and presses
Contracting spring 2, owing to the degree of depth in the second hole 31 is more than the length of small column 101, after motion one segment distance, safe piston 1 takes off
Go out the first hole 41 and open passage 411.
In a word, the foregoing is only preferred embodiment of the present utility model, all according to this utility model claim institute
Impartial change and the modification made, all should belong to the covering scope of this utility model patent.
Claims (6)
1. the pressure limiting valve of relief valve is installed, including pressure limiting valve body (3) and the pressure limiting piston (4) that is arranged in pressure limiting valve body (3),
It is characterized in that: also include being arranged on valve body (3) and relief valve in air inlet working chamber that pressure limiting piston (4) is formed, relief valve
Including safe piston (1) and the spring (2) that is arranged in safe piston (1), pressure limiting piston (4) is provided with the first hole (41), and
Being provided with the passage (411) being in communication with the outside in one hole (41), the inwall that safe piston (1) is provided with the first hole (41) coordinates
The first sealing ring (11), spring (2) promote safe piston (1) to stretch in the first hole (41) and pass through the first sealing ring (11) every
Disconnected air inlet working chamber connects with passage (411), and the air pressure increased in work inlet chamber promotes safe piston (1) antagonism spring
(2) elastic force also makes safe piston (1) skid off the first hole (41) outward and to connect work inlet chamber and passage (411).
The pressure limiting valve being provided with relief valve the most according to claim 1, it is characterised in that: also include screw (5), screw
(5) being arranged in safe piston (1), screw (5) is provided with bulge loop (51), and the diameter of bulge loop (51) is more than the diameter of spring (2),
Spring (2) is set on screw (5), the contact internal walls of one end of spring (2) and safe piston (1), the other end of spring (2) with
Bulge loop (51) contacts.
The pressure limiting valve being provided with relief valve the most according to claim 2, it is characterised in that: one end of screw (5) is worn successively
Cross safe piston (1) and pressure limiting piston (4) and pressure limiting piston (4) external part outward is stretched out in formation, the external part of screw (5) is pacified
Equipped with nut (52), the diameter of nut (52) is more than the diameter of passage (411), the external part of nut (52) regulation screw (5)
Length also controls the decrement of spring (2).
The pressure limiting valve being provided with relief valve the most according to claim 3, it is characterised in that: the diameter of screw (5) is less than logical
The diameter of pore (411), screw (5) is through passage (411) and stretches out pressure limiting piston (4) outward.
The pressure limiting valve being provided with relief valve the most according to claim 1, it is characterised in that: valve body (3) be provided with axis with
The second hole (31) that the axis in the first hole (41) is parallel, safe piston (1) is provided with the second sealing coordinated with the second hole (31)
Circle (12).
The pressure limiting valve being provided with relief valve the most according to claim 5, it is characterised in that: safe piston (1) includes roundlet
Post (101) and diameter are more than the big cylinder (102) of the diameter of small column (101), and the first sealing ring (11) is located at small column (101)
Outer wall on, the second sealing ring (12) is located on the outer wall of big cylinder (102), and spring (2) is arranged on the inner chamber of big cylinder (102)
In.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620702821.4U CN205841888U (en) | 2016-06-29 | 2016-06-29 | The pressure limiting valve of relief valve is installed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620702821.4U CN205841888U (en) | 2016-06-29 | 2016-06-29 | The pressure limiting valve of relief valve is installed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205841888U true CN205841888U (en) | 2016-12-28 |
Family
ID=58150669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620702821.4U Active CN205841888U (en) | 2016-06-29 | 2016-06-29 | The pressure limiting valve of relief valve is installed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205841888U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111907506A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | Multi-loop protection valve for automobile braking system |
| CN113932148A (en) * | 2021-09-02 | 2022-01-14 | 中国航空工业集团公司沈阳飞机设计研究所 | High-pressure oxygen pressure-limiting valve |
-
2016
- 2016-06-29 CN CN201620702821.4U patent/CN205841888U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111907506A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | Multi-loop protection valve for automobile braking system |
| CN113932148A (en) * | 2021-09-02 | 2022-01-14 | 中国航空工业集团公司沈阳飞机设计研究所 | High-pressure oxygen pressure-limiting valve |
| CN113932148B (en) * | 2021-09-02 | 2023-05-05 | 中国航空工业集团公司沈阳飞机设计研究所 | High-pressure oxygen pressure limiting valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |