CN211779224U - Zero dead volume back pressure valve - Google Patents
Zero dead volume back pressure valve Download PDFInfo
- Publication number
- CN211779224U CN211779224U CN202020372846.9U CN202020372846U CN211779224U CN 211779224 U CN211779224 U CN 211779224U CN 202020372846 U CN202020372846 U CN 202020372846U CN 211779224 U CN211779224 U CN 211779224U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- pipeline
- gland
- float
- 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
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model discloses a zero dead volume back pressure valve, the valve body is a U-shaped groove structure, the bottom is provided with a central groove, the valve needle is inserted in the central groove and fixed in the center of the float, the opening of the valve body is provided with a gland, the gland is fixed in the gland and forms a surrounding space with the inner groove of the valve body, the float is arranged in the surrounding space; an inlet adapter is arranged on one side of the valve body, a valve needle inlet pipeline and a float pipeline are arranged in the valve body, the valve needle inlet pipeline is connected with the valve needle, and the float pipeline is connected to the bottom of the U-shaped groove. The utility model has the advantages that through the structural optimization, the inlet pipeline of the back-pressure valve is divided into two paths, one path enters the lower part of the float to jack the float, the float drives the valve needle to move upwards, and the other path directly flows out through the lower part of the valve needle to reduce the dead volume inside the back-pressure valve; the valve needle is sleeved with an O-shaped ring, so that the displacement phenomenon of fluid at the bottom of the valve needle and fluid below the floater due to density difference is avoided, and the data reliability is improved.
Description
Technical Field
The utility model relates to a back pressure valve technical field, more specifically the utility model relates to a zero dead volume back pressure valve that says so.
Background
The back-pressure valve is to maintain displacement system internal pressure, applys constant pressure to the back-pressure valve through the air pump, and when system pressure is higher than back-pressure valve pressure, the back-pressure valve is automatic to be opened, discharges the fluid, and when pressure less than or equal to applys with the atmospheric pressure on the back-pressure valve, the back-pressure valve is closed.
The existing back-pressure valve is only one way, fluid needs to enter the lower portion of the floater firstly, then the floater floats upwards, then the gap between the valve needle and the valve body is formed, then the fluid flows out from the bottom of the valve needle, the fluid can flow and be treated only through the lower portion of the floater, the dead volume is increased, the produced fluid metering lag is caused, and the accurate yield of the produced fluid cannot be obtained accurately through calibration.
Therefore, how to provide a back pressure valve capable of accurately measuring is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a zero dead volume backpressure valve that can solve the dead volume problem.
In order to achieve the above object, the present invention provides the following technical solutions, which mainly include: the valve comprises a valve body, a floater, a gland, a valve needle, a sealing gland and an inlet adapter; the valve body is of a U-shaped groove structure, a central groove is formed in the bottom of the valve body, the valve needle is inserted into the central groove and fixed in the center of the floater, and a tail plug is arranged at the tail end of the central groove of the valve body; the pressure cover is arranged at the opening of the valve body, the sealing pressure cover is fixed in the pressure cover and forms a surrounding space with the groove in the valve body, and the floater is arranged in the surrounding space; the inlet adapter is fixed in valve body one side, and inside is equipped with into needle pipeline and float pipeline, wherein, it is connected with the needle to go into the needle pipeline, float pipeline connection is in U type bottom of the groove portion.
Preferably, in the zero dead volume back pressure valve, the gland is fixed inside the valve body through threads, the sealing gland is sleeved inside the gland through a stepped structure, the tail end of the sealing gland is provided with a sealing ring, a back pressure pipeline is arranged inside the sealing gland and connected to an external air pump to apply pressure to the floater; and the float is provided with a sealing ring to separate fluid entering the valve needle pipeline and the return pressure pipeline from airflow in the return pressure pipeline.
Preferably, in the zero dead volume back pressure valve, the valve body, the tail plug, the gland, the sealing gland, the valve needle and the back pressure pipeline are concentric and share the same central shaft.
Preferably, in above-mentioned zero dead volume back pressure valve, the entry adapter passes through the threaded fixation in valve body one side, the tail is stifled to pass through the fix with screw.
Known from the above technical scheme, compare with prior art, the utility model has the following characteristics:
(1) through structural optimization, an inlet pipeline of the back-pressure valve is divided into two paths, one path enters the lower part of the floater to jack the floater, the floater drives the valve needle to move upwards, and the other path directly flows out through the lower part of the valve needle to reduce the dead volume inside the back-pressure valve;
(2) the valve needle is sleeved with an O-shaped ring, so that the displacement phenomenon of fluid at the bottom of the valve needle and fluid below the floater due to density difference is avoided;
(3) the top of the back pressure valve applies back pressure through gas, and after the target back pressure is set, the system pressure is higher than the pressure of the back pressure valve and naturally flows out of the back pressure valve, so that the system pressure is ensured to be consistent with the set value of the back pressure;
(4) the utility model discloses after well system fluid got into the back pressure valve, need not through the float below, can directly flow out from the needle below, shorten the time of system output liquid business turn over back pressure valve on the one hand, improve data in real time, when on the other hand different fluids successively injected into the back pressure valve, avoid producing a large amount of dead volume replacement processes below the float, and avoid replacing the not thorough condition and take place, improve data reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic sectional structure diagram of the present invention.
Figure 2 is the side cut structure schematic diagram of the utility model.
Fig. 3 is a schematic diagram of the float pipeline structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-3, which are a zero dead volume back pressure valve disclosed in the present invention.
The utility model discloses, mainly include: the valve comprises a valve body 1, a floater 4, a gland 5, a valve needle 8, a sealing gland 65 and an inlet adapter 2; the valve body 1 is of a U-shaped groove structure, a central groove is formed in the bottom of the valve body, the valve needle 8 is inserted into the central groove and fixed in the center of the floater 4, and a tail plug 3 is arranged at the tail end of the central groove of the valve body 1; the gland 5 is arranged at the opening of the valve body 1, the sealing gland 6 is fixed in the gland 5 and forms a surrounding space with the inner groove of the valve body 1, and the floater 4 is arranged in the surrounding space; the inlet adapter 2 is fixed on one side of the valve body 1, and a valve needle pipeline 21 and a floater 4 pipeline are arranged inside the valve body, wherein the valve needle pipeline 21 is connected with the valve needle 8, and the floater pipeline 22 is connected to the bottom of the U-shaped groove.
In order to further optimize the technical scheme, the gland 5 is fixed inside the valve body 1 through threads, the sealing gland 6 is sleeved inside the gland 5 through a stepped structure, the tail end of the sealing gland is provided with a sealing ring 7, a back pressure pipeline 61 is arranged inside the sealing gland 6 and connected with an external air pump to apply pressure to the floater 4; the float 4 is provided with a sealing ring 7 to isolate the fluid entering the needle line 21 and the float line 22 from the air flow in the back pressure pipe 61.
In order to further optimize the technical scheme, the valve body 1, the tail plug 3, the gland 5, the sealing gland 6, the valve needle 8 and the return pressure pipeline 61 are concentric and are positioned on the same central shaft.
In order to further optimize the technical scheme, the inlet adapter 2 is fixed on one side of the valve body 1 through threads, and the tail plug 3 is fixed through screws.
In order to further optimize the above technical scheme, the utility model discloses a theory of operation does:
the fluid to be measured flows into the valve body 1 through the inlet adapter 2, wherein the float pipeline 22 fills the bottom space of the float 4 with the fluid, and the valve needle inlet pipeline 21 is connected with the valve needle 8; at this time, because the air pump is connected in the back pressure pipeline 61 to make the float 4 have a longitudinal pressure, when the fluid pressure is greater than the pressure applied by the air pump, the float 4 is driven to move towards the back pressure pipeline 61 to drive the valve needle 8 to move, because the fluid flows into the bottom of the float 4 through the float pipeline 22, the fluid flowing into the valve needle pipeline 21 flows out from the valve needle 8, the fluid flowing into the valve needle pipeline 21 is prevented from being required to go around the float 4 for one circle, and the purpose of zero dead volume is realized.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The utility model provides a zero dead volume back pressure valve which characterized in that mainly includes: the valve comprises a valve body, a floater, a gland, a valve needle, a sealing gland and an inlet adapter; the valve body is of a U-shaped groove structure, a central groove is formed in the bottom of the valve body, the valve needle is inserted into the central groove and fixed in the center of the floater, and a tail plug is arranged at the tail end of the central groove of the valve body; the pressure cover is arranged at the opening of the valve body, the sealing pressure cover is fixed in the pressure cover and forms a surrounding space with the groove in the valve body, and the floater is arranged in the surrounding space; the inlet adapter is fixed in valve body one side, and inside is equipped with into needle pipeline and float pipeline, wherein, it is connected with the needle to go into the needle pipeline, float pipeline connection is in U type bottom of the groove portion.
2. The zero dead volume back pressure valve of claim 1, wherein the gland is fixed inside the valve body by screw threads, the gland is sleeved inside the gland by a stepped structure and provided with a sealing ring at the end, and a back pressure pipeline is arranged inside the gland and connected to an external air pump to apply pressure to the floater; and the float is provided with a sealing ring to separate fluid entering the valve needle pipeline and the return pressure pipeline from airflow in the return pressure pipeline.
3. The zero dead volume back pressure valve of claim 1, wherein the valve body, the tail plug, the gland, the valve needle and the back pressure pipeline are concentric and are located on the same central shaft.
4. The zero dead volume back pressure valve of claim 1, wherein the inlet adapter is threadably secured to one side of the valve body and the tail plug is secured by a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020372846.9U CN211779224U (en) | 2020-03-23 | 2020-03-23 | Zero dead volume back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020372846.9U CN211779224U (en) | 2020-03-23 | 2020-03-23 | Zero dead volume back pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211779224U true CN211779224U (en) | 2020-10-27 |
Family
ID=72932931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020372846.9U Active CN211779224U (en) | 2020-03-23 | 2020-03-23 | Zero dead volume back pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211779224U (en) |
-
2020
- 2020-03-23 CN CN202020372846.9U patent/CN211779224U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108166958B (en) | A shunting intelligence injection mandrel for large-traffic water injection in oil field | |
| CN211779224U (en) | Zero dead volume back pressure valve | |
| CN101550823B (en) | Method and device for improving the accuracy of flow rate test of flowmeter used for water injection wells in oil fields | |
| CN201176873Y (en) | Oilfield water injection well flow gauge | |
| CN204903490U (en) | Two multi -functional rock core fasteners of confined pressure of fine and close oil reservoir of crack nature and experimental apparatus | |
| CN108593030B (en) | Two-way metering type oil consumption meter | |
| CN212275000U (en) | Differential pressure flowmeter metering device | |
| CN212839453U (en) | High-temperature high-precision regulating valve | |
| CN202793929U (en) | Extreme pressure value detecting device for battery sealing piece, | |
| CN111750936A (en) | Differential pressure flowmeter metering device | |
| CN204557885U (en) | A kind of throttle-type bistable formula on-way resistance experiment instrument | |
| CN216925989U (en) | Calibration system of throttle pipe for nuclear main pump mechanical sealing device | |
| CN114962284B (en) | Novel pump test device | |
| CN220932294U (en) | Transformer tightness testing device | |
| EP0038020B1 (en) | Turbine wheel flow measuring device | |
| CN205446005U (en) | Plunger pump valves | |
| CN110715081B (en) | Non return direction adjustable mechanical linkage formula check valve | |
| CN219142219U (en) | Visual valve test device | |
| CN211448999U (en) | Low-pressure oil pump function test platform | |
| CN213688514U (en) | Underground layered thin pipe flowmeter | |
| CN203614485U (en) | Overflow valve | |
| CN219888288U (en) | Performance testing device for internal reflux pump | |
| CN213838891U (en) | Flow pressure testing device for vane pump | |
| CN219317299U (en) | Valve opening mechanism of hydraulic valve | |
| CN211779004U (en) | Low-noise sleeve single-seat regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |