CN205559274U - External relief valve of spring for screw pump - Google Patents
External relief valve of spring for screw pump Download PDFInfo
- Publication number
- CN205559274U CN205559274U CN201620386452.2U CN201620386452U CN205559274U CN 205559274 U CN205559274 U CN 205559274U CN 201620386452 U CN201620386452 U CN 201620386452U CN 205559274 U CN205559274 U CN 205559274U
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- CN
- China
- Prior art keywords
- spring
- valve
- valve gap
- spool
- adjusting rod
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides an external relief valve of spring for screw pump which characterized in that: which comprises the following components: a valve body, case and valve gap, the valve body is installed between the high pressure chest of the pump body and low pressure chamber, and with pump body high -low pressure chamber UNICOM, the valve body center is the backward flow chamber, the one end of case is located the backward flow intracavity, the other end of case passes through the valve gap to be fixed, the case is equipped with O type circle with valve gap contact department and seals, through bolt fixed connection between valve gap and the valve body, it is equipped with the spring to be close to valve gap department in the case, the spring is worn to establish on adjusting the pole, the junction of adjusting pole and valve gap is equipped with thrust bearing, the one end contact case of spring, it is fixed that the other end passes through the spring holder, the spring seat cover is established on adjusting the pole, the spring holder passes through the thread bush and adjusts the pole cooperation, and through stop pin and valve gap fixed connection. With the inside of spring setting at the relief valve case, avoided the medium contact spring, reduced the chance that the spring is corroded by the medium for this relief valve can be used for transmitting corrosive medium's screw pump.
Description
Technical field
This utility model relates to relief valve field, is specifically related to the relief valve of a kind of screw pump external spring.
Background technology
Screw pump by screw rod number be divided into single-screw (single screw) pump, double, three and five-screw pump.The feature of screw pump is
Flow trim, pressure fluctuation is little, have that suction capacity, noise are low, efficiency is high, life-span length, reliable operation；
And its prominent advantage is formed without eddy current, insensitive to the viscosity of medium when being pumped (conveying) medium, height can be carried
Viscous media.Relief valve, as the safety fittings of screw pump indispensability, is used for protecting the safety of the pump housing, simultaneously
The safety of protection user, when blocking in the pump housing, open the safety-valve pressure release timely, it is ensured that conveying
Safety.Safety valve spring of the prior art uses built-in, after opening the safety-valve, and medium contact spring,
But for carrying mordant medium, the built-in spring of relief valve is easily corroded.Now, if handle
Spring materials changes rustless steel into, and one is to increase cost, and two is that spring performance is difficult to meet use requirement.
So changing built-in for relief valve spring into external spring.
Utility model content
For the problems referred to above, the purpose of this utility model provides the relief valve of a kind of screw pump external spring,
Ensure that medium does not contacts with spring, it is to avoid corrosion.
This utility model solves above-mentioned technical problem and be the technical scheme is that a kind of screw pump spring
External relief valve, it is characterised in that: including valve body, spool and valve gap, valve body is arranged on the height of the pump housing
Pressure chamber and low pressure chamber between, and with pump housing high-low pressure chamber UNICOM, valve body center is back cavity, described spool
One end be positioned at back cavity, with valve body be in close contact, formed sealing surface, relief valve close time, medium
Terminating in sealing surface, do not enter in back cavity, when needs pressure release, open the safety-valve, spool is at adjusting rod
Drive under move to valve gap direction, the sealing surface between spool and valve body is opened, and medium is from high pressure chest stream
To back cavity, then flowing back in low pressure chamber, the other end of described spool is closed by valve gap, described spool
Being provided with O with valve gap contact position, when spool thinks to move in valve gap direction, medium enters back cavity, O
Type circle seals and stops medium to enter valve core inside, it is to avoid spring contacts with medium, described valve gap and valve
Being bolted to connection between body, be provided with spring in described spool, described spring is located on adjusting rod,
One end of adjusting rod is by being equipped with at center spool with spool, and the other end of adjusting rod wears and valve gap
On, and extending valve gap, described adjusting rod is provided with thrust bearing with the junction of valve gap, described spring
End thereof contacts spool, the other end fixed by spring base, and described spring socket sleeve is located on adjusting rod, spring
Seat is coordinated with adjusting rod by thread bush, and is connected by stop pin and valve gap are fixing.
Further, described stop pin moves along valve gap sidewall, the position of regulation spring base.Spring base passes through
Adjusting rod and stop pin carry out adjusting position.
Further, the bottom of described spool is provided with boss, and spring is arranged on boss.The lower end of spring with
The lower end of adjusting rod does not contacts, it is ensured that moving freely of adjusting rod, ensures safety by compression spring.
Further, described adjusting rod is located on fixing seat, and described fixing seat is fixed by support with spool
Connect.
The utility model has the advantage of: 1, spring is arranged on the inside of relief valve spool, it is to avoid be situated between
Matter contact spring, decreases spring by the chance of dielectric corrosion so that this relief valve can be used for transmitting corrosion
The screw pump of property medium；
2, thrust bearing it is provided with between adjusting rod and valve gap, more time saving and energy saving when making regulation, convenient regulation；
3, spring fixed seat is fixed by stop pin, and stop pin can regulate position according to the needs of spring and pump
Put；
4, sealed by O between valve gap and spool, prevent medium and spring contact.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art,
The accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below,
It should be evident that the accompanying drawing in describing below is embodiments more of the present utility model, for this area
From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Wherein: 1, valve body 2, spool 3, valve gap 4, adjusting rod 5, spring base 6,
Spring 7, O 8, bolt 9, thrust bearing 10, stop pin 11, high pressure chest
12, back cavity 13, boss 14, fixing seat 15, low pressure chamber
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that
Described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on this
Embodiment in utility model, those of ordinary skill in the art are institute under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
In description of the present utility model, it should be noted that term " " center ", " on ", D score,
The orientation of the instruction such as "left", "right", " vertically ", " level ", " interior ", " outward " or position
Relation of putting for based on orientation shown in the drawings or position relationship, be for only for ease of description this utility model and
Simplify and describe rather than indicate or imply that the device of indication or element must have specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " be only used for describing purpose, and it is not intended that instruction or hint relatively
Importance.
The relief valve that a kind of screw pump spring 6 as shown in Figure 1 is external, it is characterised in that: include valve
Body 1, spool 2 and valve gap 3, valve body 1 is arranged between the high pressure chest 11 of the pump housing and low pressure chamber 15, and
With pump housing high-low pressure chamber 15 UNICOM, valve body 1 center is back cavity 12, and one end of described spool 2 is positioned at
In back cavity 12, being in close contact with valve body 1, form sealing surface, when relief valve cuts out, medium terminates in close
Front cover, does not enter in back cavity 12, when needs pressure release, opens the safety-valve, and spool 2 is at adjusting rod 4
Drive under move to valve gap 3 direction, the sealing surface between spool 2 and valve body 1 is opened, and medium is from height
Pressure chamber 11 flows to back cavity 12, then flows back in low pressure chamber 15, and the other end of described spool 2 passes through valve
Lid 3 closing, described spool 2 is provided with O 7, when spool 2 thinks valve gap 3 side with valve gap 3 contact position
When motion, medium enters back cavity 12, and O 7 seals and stops medium entrance spool 2 internal, keeps away
Exempt from contacting of spring 6 and medium, be connected by bolt 8 is fixing between described valve gap 3 and valve body 1,
Being provided with spring 6 in described spool 2, described spring 6 is located on adjusting rod 4, one end of adjusting rod 4
By being equipped with at spool 2 center with spool 2, the other end of adjusting rod 4 wear with on valve gap 3,
And extending valve gap 3, described adjusting rod 4 is provided with thrust bearing 9, described spring with the junction of valve gap 3
The end thereof contacts spool 2 of 6, the other end is fixing by 65, spring, and 65, described spring is set in tune
On pole 4,65, spring is coordinated with adjusting rod 4 by thread bush, and by stop pin 10 and valve
Lid 3 is fixing to be connected.
Further, described in push away stop pin 10 and move along valve gap 3 sidewall, the position of regulation spring base 5.Bullet
Spring abutment 5 is by adjusting rod 4 and pushes away stop pin 10 and carrys out adjusting position.
Further, the bottom of described spool 2 is provided with boss 13, and spring 6 is arranged on boss 13.Bullet
The lower end of spring 6 does not contacts with the lower end of adjusting rod 4, it is ensured that moving freely of adjusting rod 4, by compression
Spring 6 ensures safety.
Further, described adjusting rod 4 is located on fixing seat 14, and described fixing seat 14 leads to spool 2
Cross the fixing connection of support.
Working method: when screw pump normally works, relief valve is closed, and spool 2 is tight with valve body 1
Contiguity is touched, and forms sealing surface, and medium will not enter back cavity 12, when needs pressure release or cavity pressure are higher than
During certain numerical value, spool 2 moves to valve gap 3 direction, compression spring 6 resilience, adjusting rod 4 simultaneously
Being displaced outwardly by thrust bearing 9, spool 2 destroys with the sealing surface of valve body 1, and medium enters back cavity
12, side by side to low pressure chamber, between spool 2 and valve gap 3, it is provided with O 7, stops medium to enter, bullet
Spring 6 is arranged in the cavity of spool 2 and valve gap 3 formation, it is to avoid medium contacts with spring 6, prevents
Spring 6 is corroded.Need according to pressure and medium needs regulation to push away the position of stop pin 10, control spring
The position of seat 5, drives the compression degree of regulation spring 6.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, and
Non-to its restriction；Although this utility model being described in detail with reference to foregoing embodiments, ability
The those of ordinary skill in territory is it is understood that it still can be to the technical scheme described in foregoing embodiments
Modify, or the most some or all of technical characteristic is carried out equivalent；And these amendment or
Person replaces, and does not make the essence of appropriate technical solution depart from the model of this utility model each embodiment technical scheme
Enclose.
Claims (4)
1. the relief valve of a screw pump external spring, it is characterised in that: include valve body, spool and valve
Lid, valve body is arranged between the high pressure chest of the pump housing and low pressure chamber, and with pump housing high-low pressure chamber UNICOM, valve body
Center is back cavity, and one end of described spool is positioned at back cavity, is in close contact with valve body, is formed and seals
Face, when relief valve cuts out, medium terminates in sealing surface, does not enter in back cavity, the other end of described spool
Being fixed by valve gap, described spool and valve gap contact position are provided with O and seal, described valve gap and valve body it
Between be bolted to connection, be provided with spring at the valve gap in described spool, described spring is located in tune
On pole, one end of adjusting rod is by being equipped with at center spool with spool, and the other end of adjusting rod is worn
If with on valve gap, and extending valve gap, described adjusting rod is provided with thrust bearing with the junction of valve gap, institute
Stating the end thereof contacts spool of spring, the other end is fixed by spring base, and described spring socket sleeve is located at adjusting rod
On, spring base is coordinated with adjusting rod by thread bush, and is connected by stop pin and valve gap are fixing.
The relief valve of a kind of screw pump external spring the most according to claim 1, it is characterised in that:
Described stop pin moves along valve gap sidewall, the position of regulation spring base.
The relief valve of a kind of screw pump external spring the most according to claim 1, it is characterised in that:
The bottom of described spool is provided with boss, and spring is arranged on boss.
The relief valve of a kind of screw pump external spring the most according to claim 1, it is characterised in that:
Described adjusting rod is located on fixing seat, and described fixing seat is connected by support is fixing with spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620386452.2U CN205559274U (en) | 2016-04-28 | 2016-04-28 | External relief valve of spring for screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620386452.2U CN205559274U (en) | 2016-04-28 | 2016-04-28 | External relief valve of spring for screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205559274U true CN205559274U (en) | 2016-09-07 |
Family
ID=56804495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620386452.2U Expired - Fee Related CN205559274U (en) | 2016-04-28 | 2016-04-28 | External relief valve of spring for screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205559274U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131164A (en) * | 2019-05-10 | 2019-08-16 | 士商（上海）机械有限公司 | A kind of pressure control device of fluid delivery pump |
-
2016
- 2016-04-28 CN CN201620386452.2U patent/CN205559274U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131164A (en) * | 2019-05-10 | 2019-08-16 | 士商（上海）机械有限公司 | A kind of pressure control device of fluid delivery pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20190428 |