CN103512703A - Differential pressure densimeter pressure protection device - Google Patents
Differential pressure densimeter pressure protection device Download PDFInfo
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- CN103512703A CN103512703A CN201310429087.XA CN201310429087A CN103512703A CN 103512703 A CN103512703 A CN 103512703A CN 201310429087 A CN201310429087 A CN 201310429087A CN 103512703 A CN103512703 A CN 103512703A
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- corrugated tube
- protective device
- spring
- pressure
- pressure protective
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Abstract
The invention relates to a differential pressure densimeter pressure protection device which comprises a corrugated pipe, a pressing cover, a spring and a corrugated pipe base. The corrugated pipe is arranged on the corrugated pipe base. The spring is connected to the outer portion of the pressing cover in a sleeved mode. A corrugated pipe inner cavity is arranged in the corrugated pipe. A channel which is communicated with the corrugated pipe inner cavity is arranged on the corrugated pipe base. The spring is pressed on the corrugated pipe through the pressing cover. The differential pressure densimeter pressure protection device is good in stability and can avoid waste.
Description
Technical field
The invention belongs to oil instrument class, relate to a kind of gradiomanometer tool pressure protective device, relate in particular to a kind of protective device of the differential pressure pickup of gradiomanometer tool used while detecting for underground mining oil.
Background technology
At present production logging mainly the density by measuring well inner fluid or water holdup with identification fluid.The densitometer major part that domestic recover petroleum is used is radioactive density meter, but along with each oil field is more and more paid attention to safety in production, this method with the radiation that causes of radioactive source have very large hidden danger.Gradiomanometer tool is not used radioactive source, but adopt differential pressure technology, according to medium, the differential pressure value in certain vertical range calculates density value, and it is high that it has precision, and good reliability is used safety, easily advantage.
The core component of gradiomanometer tool is differential pressure pickup; because underground work environmental pressure is larger, can reach tens Mpa; and the pressure differential that differential pressure pickup is differentiated only has tens Kpa; if sensor does not have corresponding pressure protective device; down-hole pressure fluctuation exceeds transducer range and too much will cause sensor unrepairable to damage; cause whole instrument to lose efficacy, cause damage.
Summary of the invention
In order to solve the above-mentioned technical matters existing in background technology, the gradiomanometer tool pressure protective device that the invention provides a kind of good stability and can avoid waste.
Technical solution of the present invention is: the invention provides a kind of gradiomanometer tool pressure protective device, its special character is: described gradiomanometer tool pressure protective device comprises corrugated tube, gland, spring and corrugated tube base; Described corrugated tube is arranged on corrugated tube base; Described spring housing is connected on gland outside; Described bellows interior is provided with corrugated tube inner chamber; On described corrugated tube base, be provided with the passage connecting with corrugated tube inner chamber; Described spring is compressed on corrugated tube by gland.
Above-mentioned gradiomanometer tool pressure protective device also comprises the first force pipe connecting with passage and the second force pipe that is connected with gland and exerts pressure to gland.
Above-mentioned gradiomanometer tool pressure protective device also comprises for connecting the retaining valve assembly of the first force pipe and the second force pipe.
Above-mentioned retaining valve assembly comprises one or two retaining valve.
When above-mentioned retaining valve assembly comprises a retaining valve, described the first force pipe connects by retaining valve and the second force pipe; When described retaining valve assembly comprises two retaining valves, together with described two retaining valves are arranged in parallel after connecting with the second force pipe with the first force pipe respectively.
Above-mentioned retaining valve comprises housing, is separately positioned on the pressure openings of housing both sides, is arranged on spool and the one-way valve spring of enclosure interior; One end of described spool only leans against on the pressure openings of housing one side, and the other end is connected with housing by spring; Described spool can axially moving axially along housing; The described pressure openings that is arranged on housing both sides connects mutually by spool.
Above-mentioned corrugated tube is metallic bellows or nonmetal corrugated tube.
When above-mentioned corrugated tube is metallic bellows, described corrugated tube is bronze corrugated tube, brass corrugated tube, corrugated stainless steel tubing, Monel corrugated tube or inconel that alloy corrugated pipe.
Above-mentioned corrugated tube is singel-ply bellows or multiply bellows.
Advantage of the present invention is:
The invention provides a kind of gradiomanometer tool pressure protective device; this device is that the pressure differential of the silicone oil perception in the kapillary connecting respectively when micro-pressure sensor two ends is while being greater than the range of three times; beginning is by the pressure differential of flexible member counteracting continuation increase or directly by the conducting of sensor both sides; the pressure differential of sensor both sides is no longer increased, and then protection sensor is avoided damaging.Gradiomanometer tool pressure protective device provided by the present invention comprises corrugated tube assembly and the retaining valve assembly based on corrugated tube assembly.
Wherein, corrugated tube assembly is mainly comprised of corrugated tube, gland, spring three parts, corrugated tube inner chamber is communicated with by kapillary with little differential pressure sensor one end, corrugated tube outside be communicated with the sensor other end, during installation, spring applies certain precompression by gland to corrugated tube, and the rigidity of spring and corrugated tube need be calculated accurately.When the pressure in the kapillary that the inner chamber of corrugated tube is communicated with exceeds suddenly pressure in the outside kapillary being communicated with of corrugated tube and reaches setting, corrugated tube will overcome pre-pressure of the spring and produce displacement upwards according to self-characteristic by gland, along with the elastic force of the increase spring of displacement also will increase, until reach balance, and temporarily impact energy is stored in spring, discharge gradually subsequently.When the pressure that exceeds corrugated tube inner chamber when corrugated tube external pressure fluctuations reaches setting, corrugated tube will produce downward displacement, pressure surge is absorbed and is converted into the elastic potential energy of self, and reach new balance, spring withstands on not action on corrugated tube base all the time.Due to corrugated tube and spring rate all less, action response time is short, so corrugated tube assembly is mainly that sensor is carried out to compression shock protection.
Retaining valve assembly comprises that spool, spring, housing three parts form.When the pressure of sensor one end exceeds other end pressure and reaches opening pressure, spool by the kapillary conducting of sensor both sides, and then is eliminated sensor two ends pressure reduction by against the force of the spring, until exceed the pressure differential of part, disappears, and retaining valve recovers closed condition.
Heat stability is good of the present invention, corrosion-resistant height, the feature that resistance to static pressure is high, can directly contact with most media, is adapted at down-hole and relatively in rugged environment, uses.Corrugated tube elastic property is good, highly sensitive, and the response time is short, and compression shock is effectively absorbed.A corrugated tube can be realized both sides overpressure difference surge protection.One-way valve structures is simply easy to make and calculates simple, is comparatively easy to just can obtain suitable design parameter.Modular design, dismounting, replacing, installation rapid and convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of corrugated tube assembly provided by the present invention;
Fig. 2 is the structural representation of retaining valve assembly of the present invention;
Wherein:
1-corrugated tube base; 2-corrugated tube; 3-gland; 4-spring; 5-corrugated tube inner chamber; 6-passage; 7-housing; 8-spool; 9-one-way valve spring; 10-pressure openings.
Embodiment
The invention provides a kind of gradiomanometer tool pressure protective device, first this gradiomanometer tool pressure protective device is corrugated tube assembly, refers to Fig. 1, and corrugated tube assembly comprises corrugated tube 2, gland 3, spring 4 and corrugated tube base 1; Corrugated tube 2 is arranged on corrugated tube base 1; Spring 4 is socketed in gland 3 outsides; Corrugated tube 2 inside are provided with corrugated tube inner chamber 5; On corrugated tube base corrugated tube base 1, be provided with the passage 6 connecting with corrugated tube inner chamber 5; Spring 4 is compressed on corrugated tube 2 by gland 3.
Gradiomanometer tool pressure protective device also comprises the first force pipe connecting with passage 6 and the second force pipe that is connected with gland 3 and exerts pressure to gland 3.
Corrugated tube inner chamber 5 is communicated with by kapillary with little differential pressure sensor one end, corrugated tube 2 outside be communicated with the sensor other end, during installation, spring 4 applies certain precompression by 3 pairs of corrugated tubes 2 of gland, the rigidity of spring 4 and corrugated tube 2 need be calculated accurately.When the pressure in the kapillary that the inner chamber of corrugated tube 2 is communicated with exceeds suddenly pressure in the outside kapillary being communicated with of corrugated tube 2 and reaches setting, corrugated tube 2 will overcome spring 4 precompressions and produce displacement upwards according to self-characteristic by gland 3, along with the elastic force of the increase spring 4 of displacement also will increase, until reach balance, and temporarily impact energy is stored in spring 4, discharge gradually subsequently.When the pressure that exceeds corrugated tube inner chamber 5 when corrugated tube 2 external pressure fluctuations reaches setting, corrugated tube 2 will produce downward displacement, pressure surge is absorbed and is converted into the elastic potential energy of self, and reach new balance, spring 4 withstands on not action on corrugated tube base corrugated tube base 1 all the time.Due to corrugated tube 2 and spring 4 rigidity all less, action response time is short, so corrugated tube assembly is mainly that sensor is carried out to compression shock protection.
Content-based, the present invention also comprises on this basis for connecting the retaining valve assembly of the first force pipe and the second force pipe.
By two contrary retaining valves of opening direction, composed in parallel, each retaining valve is comprised of spool 8, one-way valve spring 9, housing 7 three parts.When the pressure of sensor one end exceeds other end pressure and reaches opening pressure, spool 8 will overcome one-way valve spring 9 resistances by the kapillary conducting of sensor both sides, and then eliminate sensor two ends pressure reduction, and until exceed the pressure differential of part, disappearing, retaining valve recovers closed condition.
Retaining valve assembly comprises one or two retaining valve.
When retaining valve assembly comprises a retaining valve, the first force pipe connects by retaining valve and the second force pipe; When retaining valve assembly comprises two retaining valves, together with being arranged in parallel after two retaining valves connect with the second force pipe with the first force pipe respectively.
Retaining valve comprises housing 7, is separately positioned on the pressure openings 10 of housing 7 both sides, is arranged on spool 8 and the one-way valve spring 9 of housing 7 inside; One end of spool 8 only leans against on the pressure openings 10 of housing 7 one sides, and the other end is connected with housing 7 by one-way valve spring 9; Spool 8 can axially moving axially along housing 7; The pressure openings 10 that is arranged on housing 7 both sides connects mutually by spool 8.
When corrugated tube 2 is metallic bellows, corrugated tube is bronze corrugated tube, brass corrugated tube, corrugated stainless steel tubing, Monel corrugated tube or inconel that alloy corrugated pipe.
The invention provides the pressure protective device in a kind of gradiomanometer tool, when this device can protect micro-pressure sensor in the gradiomanometer tool pressure differential when measuring to exceed the impaired pressure of sensor, avoid damaging.
Claims (9)
1. a gradiomanometer tool pressure protective device, is characterized in that: described gradiomanometer tool pressure protective device comprises corrugated tube, gland, spring and corrugated tube base; Described corrugated tube is arranged on corrugated tube base; Described spring housing is connected on gland outside; Described bellows interior is provided with corrugated tube inner chamber; On described corrugated tube base, be provided with the passage connecting with corrugated tube inner chamber; Described spring is compressed on corrugated tube by gland.
2. gradiomanometer tool pressure protective device according to claim 1, is characterized in that: described gradiomanometer tool pressure protective device also comprises the first force pipe connecting with passage and the second force pipe that is connected with gland and exerts pressure to gland.
3. gradiomanometer tool pressure protective device according to claim 2, is characterized in that: described gradiomanometer tool pressure protective device also comprises for connecting the retaining valve assembly of the first force pipe and the second force pipe.
4. gradiomanometer tool pressure protective device according to claim 3, is characterized in that: described retaining valve assembly comprises one or two retaining valve.
5. gradiomanometer tool pressure protective device according to claim 4, is characterized in that: when described retaining valve assembly comprises a retaining valve, described the first force pipe connects by retaining valve and the second force pipe; When described retaining valve assembly comprises two retaining valves, together with described two retaining valves are arranged in parallel after connecting with the second force pipe with the first force pipe respectively.
6. gradiomanometer tool pressure protective device according to claim 5, is characterized in that: described retaining valve comprises housing, is separately positioned on the pressure openings of housing both sides, is arranged on spool and the one-way valve spring of enclosure interior; One end of described spool only leans against on the pressure openings of housing one side, and the other end is connected with housing by spring; Described spool can axially moving axially along housing; The described pressure openings that is arranged on housing both sides connects mutually by spool.
7. according to the gradiomanometer tool pressure protective device described in the arbitrary claim of claim 1-6, it is characterized in that: described corrugated tube is metallic bellows or nonmetal corrugated tube.
8. gradiomanometer tool pressure protective device according to claim 7; it is characterized in that: when described corrugated tube is metallic bellows, described corrugated tube is bronze corrugated tube, brass corrugated tube, corrugated stainless steel tubing, Monel corrugated tube or inconel that alloy corrugated pipe.
9. gradiomanometer tool pressure protective device according to claim 8, is characterized in that: described corrugated tube is singel-ply bellows or multiply bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429087.XA CN103512703A (en) | 2013-09-18 | 2013-09-18 | Differential pressure densimeter pressure protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429087.XA CN103512703A (en) | 2013-09-18 | 2013-09-18 | Differential pressure densimeter pressure protection device |
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| Publication Number | Publication Date |
|---|---|
| CN103512703A true CN103512703A (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310429087.XA Pending CN103512703A (en) | 2013-09-18 | 2013-09-18 | Differential pressure densimeter pressure protection device |
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| CN (1) | CN103512703A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453809A (en) * | 2014-12-05 | 2015-03-25 | 中国石油天然气股份有限公司 | Digital intelligent water distributor |
| CN104358560B (en) * | 2014-11-12 | 2017-12-05 | 中国石油天然气股份有限公司 | A kind of downhole flow test device with protection mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135407A (en) * | 1978-04-03 | 1979-01-23 | The Foxboro Company | Method and apparatus for overrange protection of the transducer in a differential pressure transmitter |
| CN101236119A (en) * | 2007-02-01 | 2008-08-06 | 上海化工研究院 | Corrugated pipe buffers |
| CN203465054U (en) * | 2013-09-18 | 2014-03-05 | 西安思坦仪器股份有限公司 | Pressure protection apparatus for gradiomanometer |
-
2013
- 2013-09-18 CN CN201310429087.XA patent/CN103512703A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135407A (en) * | 1978-04-03 | 1979-01-23 | The Foxboro Company | Method and apparatus for overrange protection of the transducer in a differential pressure transmitter |
| CN101236119A (en) * | 2007-02-01 | 2008-08-06 | 上海化工研究院 | Corrugated pipe buffers |
| CN203465054U (en) * | 2013-09-18 | 2014-03-05 | 西安思坦仪器股份有限公司 | Pressure protection apparatus for gradiomanometer |
Non-Patent Citations (1)
| Title |
|---|
| 李玉琳: "《液压元件与系统设计》", 31 December 1991 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358560B (en) * | 2014-11-12 | 2017-12-05 | 中国石油天然气股份有限公司 | A kind of downhole flow test device with protection mechanism |
| CN104453809A (en) * | 2014-12-05 | 2015-03-25 | 中国石油天然气股份有限公司 | Digital intelligent water distributor |
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Application publication date: 20140115 |