High temperature and pressure capacitance probe
阅读：175发布：2023-07-30
专利汇可以提供High temperature and pressure capacitance probe专利检索，专利查询，专利分析的服务。并且A high pressure resistant capacitance probe including a cylindrical housing forming an elongated first electrical conductor having a coaxial chamber formed therein with a bore leading from one end thereof. A rigid dielectric alumina tube as received on one extremity in such chamber and projects through the bore to form a closed ended sensor. An annular lava seal surrounds the one extremity of the tube and is firmly compressed into sealing engagement between the housing and tube to seal against entry into such chamber of high pressures. A second electrical conductor in the form of a coil spring is received in the tube to project coaxially with the first electrical conductor to cooperate therewith in providing a predetermined capacitance across the dielectric tube whereby contact of a conductive fluid with the sensor end of the tube will alter the capacitance thereof to provide a capacitance change in the wall of such tube thus indicating such fluid contact.，下面是High temperature and pressure capacitance probe专利的具体信息内容。
1. A high pressure resistant capacitance probe comprising: a housing including a first elongated electrical conductor formed with a central cavity having an opening in one end thereof; a rigid elongated dielectric member received on one extremity in said cavity and projecting from said opening to form a sensor, said dielectric member being hollow to form a chamber disposed coextensive therewith; a second elongated electrical conductor in the form of an elongated coil received in said chamber and cooperating with said first conductor and dielectric member to develop an electrical capacitance across said dielectric member and being responsive to contact of said sensor with an electrically conductive fluid to vary said electrical capacitance; high pressure non-porous seal means surrounding said one extremity of said dielectric member and cooperating between said housing and member to seal said opening against entry of fluid under high pressure; anchoring means for securing said dielectric member in said housing; and mounting means for mounting said probe in the wall of a high pressure vessel whereby gases under high pressure in said vessel will be sealed against entry into said cavity by said seal means and contact of electrically conductive fluid in said vessel with said sensor will alter the capacitance between said electrical conductors to provide an electrically detectable output signal.
2. A high pressure resistant capacitance probe as set forth in claim 1 wherein: said housing is formed with a bore leading to said opening and formed with a necked down portion defining a seal seat tapering radially inwardly toward said opening; and said seal means includes an annular seal ring surrounding said one extremity of said dielectric member terminating on one end in a radially inwardly tapered surface for complimentally fitting and abutting said sealing surface.
3. A high pressure resistant capacitance probe as set forth in claim 1 wherein: said housing is made of a material having a coefficient of expansion different than said dielectric member and is formed with a bore leading to said opening and a necked down portion defining a seal seat; and said seal means is in the form of an annular ring made of magnesium silicate disposed in said bore for abutment on one end with said sealing seat and formed on the extremity opposite said one end with a wedge surface that angles radially inwardly and toward said opening; and said anchoring means includes an annular compression bushing surrounding said one extremity of said dielectric member to engage said wedge surface and means for compressing said bushing against said seal means.
4. A high pressure resistant capacitance probe as set forth in claim 1 wherein: said housing is made of a material having a coefficient of expansion different than said dielectric member and is formed with a bore leading to said opening and formed with a necked down portion defining a seal seat; and said seal means is in the form of an annular ring made of magnesium silicate disposed in said bore for abutment on one end with said sealing seat and formed on the extremity opposite said one end with a wedge surface that angles radially outwardly and toward said opening; and said anchoring means includes an annular compression bushing surrounding said one extremity of said dielectric member to engage said wedge surface and means for compressing said bushing against said seal means.
5. A high pressure resistant capacitance probe as set forth in claim 1 wherein: said housing includes a bore leading to said opening and formed with a necked down portion defining a sealing seat; said seal means includes a magnesium silicate ring surrounding said dielectric member and disposed in said bore for abutment on one end with said sealing surface; and said anchor means includes means for engaging the end of said ring opposite said one end to press said ring toward said sealing seat.
6. A high pressure resistant capacitance probe as set forth in claim 1 wherein: said housing includes gland means having said opening formed in one end thereof and including a bore leading rearwardly from said opening and formed with a necked out portion defining a sealing seat, said bore continuing rearwardly to form a seal-receiving annulas and an internally threaded portion; said seal means is in the form of a sealing ring received in said annulas; said anchoring means includes an annular bushing received in said bore for engaging the end of said seal opposite said one end and a compression plug for engaging said bushing and formed with external threads for receipt in said internal threads whereby said plug may be tightened in said housing axially to compress said sealing ring.
7. A high pressure resistant capacitance probe as set forth in claim 2 wherein: said annular seal ring is made of magnesium silicate.
8. A high pressure resistant capacitance probe as set forth in claim 3 wherein: said seal ring is formed said extremity opposite said one extremity with an annular groove that is V-shaped in cross section; and said bushing is formed on its extremity adjacent said ring with a V-shaped projecting edge that compliments the shape of said groove.
9. A high pressure resistant capacitance probe as set forth in claim 6 wherein: said sealing ring is made of magnesium silicate.
10. A high pressure resistant capacitance probe comprising: a housing including a first elongated electrical conductor formed with a central cavity having an opening in One end thereof; a rigid elongated dielectric member received on one extremity in said cavity and projecting from said opening to form a sensor, said dielectric member being hollow to form a chamber disposed coextensive therewith; a second elongated electrical conductor received in said chamber and cooperating with said first conductor and dielectric member to develop an electrical capacitance across said dielectric member and being responsive to contact of said sensor with an electrically conductive fluid to vary said electrical capacitance; high pressure non-porous magnesium silicate seal means surrounding and in direct contact with said one extremity of said dielectric member; constraining means in said housing, surrounding said sealing means and responsive to axial compression in one direction of said sealing means to compress said sealing means around said one extremity to seal against escape of high pressure fluid; compression means engaged with said housing and operative to axially compress said seal means in said one direction; and mounting means for mounting said probe in the wall of a high pressure vessel whereby gases under high pressure in said vessel will be sealed against entry into said cavity by said seal means and contact of electrically conductive fluid in said vessel with said sensor will alter the capacitance between said electrical conductors to provide an electrically detectable output signal.
11. A high pressure resistant capacitance probe as set forth in claim 10 wherein: said housing is formed with a bore defining said constraining means and leading to said opening and formed with a necked down portion defining a seal seat tapering radially inwardly toward said opening; and said seal means includes an annular seal ring surrounding said one extremity of said dielectric member and terminating on one end in a radially inwardly tapered surface for complimentally fitting and abutting said sealing surface.
12. A high pressure resistant capacitance probe as set forth in claim 10 wherein: said housing is made of a material having a coefficient of expansion different than said dielectric member and is formed with a bore defining said constraining means and leading to said opening and including a necked down portion defining a seal seat; said seal means is in the form of an annular ring made of magnesium silicate disposed in said bore for abutment on one end with said sealing seat and formed on the extremity opposite said one end with a wedge surface that angles radially inwardly and toward said opening; and said compression means includes an annular compression bushing surrounding said one extremity of said dielectric member to engage said wedge surface and means for compressing said bushing against said seal means.
13. A high pressure resistant capacitance probe as set forth in claim 10 wherein: said housing is made of a material having a coefficient of expansion different than said dielectric member and is formed with a bore defining said constraining means leading to said opening and formed with a necked down portion defining a seal seat; said seal means is in the form of an annular ring made of magnesium silicate disposed in said bore for abutment on one end with said sealing seat and formed on the extremity opposite said one end with a wedge surface that angles radially outwardly and toward said opening; and said compression means includes an annular compression bushing surrounding said one extremity of said dielectric member to engage said wedge surface and means for compressing said bushing against said seal means.
14. A high pressure resistant capacitance probe as set forth in claim 10 wherein: said housing includes a bore defining said constraining means and leading to said opening and formed with a necked down portion defining a sealing seat; said seal means includes a magnesium silicate ring surrounding said dielectric member and disposed in said bore for abUtment on one end with said sealing surface; and said compression means includes means for engaging the end of said ring opposite said one end to press said ring toward said sealing seat.
15. A high pressure resistant capacitance probe as set forth in claim 10 wherein: said housing includes gland means having said opening formed in one end thereof and including a bore defining said constraining means and leading rearwardly from said opening and formed with a necked out portion defining a sealing seat, said bore continuing rearwardly to form a seal-receiving annulas and an internally threaded portion; said seal means is in the form of a sealing ring received in said annulas; said compression means includes an annular bushing received in said bore for engaging the end of said seal opposite said one end and a compression plug for engaging said bushing and formed with external threads for receipt in said internal threads whereby said plug may be tightened in said housing axially to compress said sealing ring.
16. A high pressure resistant capacitance probe as set forth in claim 10 wherein: said second electrical conductor is in the form of an elongated coil.
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