WO2010008730A2 - Outil de contrôle de poches pour sièges dans des corps de vannes - Google Patents

Outil de contrôle de poches pour sièges dans des corps de vannes Download PDF

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Publication number
WO2010008730A2
WO2010008730A2 PCT/US2009/047470 US2009047470W WO2010008730A2 WO 2010008730 A2 WO2010008730 A2 WO 2010008730A2 US 2009047470 W US2009047470 W US 2009047470W WO 2010008730 A2 WO2010008730 A2 WO 2010008730A2
Authority
WO
WIPO (PCT)
Prior art keywords
seat pocket
valve body
sensor
inspection tool
valve
Prior art date
Application number
PCT/US2009/047470
Other languages
English (en)
Other versions
WO2010008730A3 (fr
Inventor
Robert N. Rogers
Rick C. Hunter
Original Assignee
Vetco Gray, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US12/140,921 external-priority patent/US8087181B2/en
Application filed by Vetco Gray, Inc. filed Critical Vetco Gray, Inc.
Priority to GB1020918.7A priority Critical patent/GB2473564B/en
Priority to BRPI0909971A priority patent/BRPI0909971A2/pt
Publication of WO2010008730A2 publication Critical patent/WO2010008730A2/fr
Publication of WO2010008730A3 publication Critical patent/WO2010008730A3/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
    • G01B5/201—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures for measuring roundness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/003—Measuring of motor parts
    • G01B5/0032—Valves, actuating devices for valves

Definitions

  • the invention relates generally to measurement tools.
  • the invention relates to a tool for measuring the surface profile of a valve seat pocket.
  • a valve is a device that regulates the flow of a material by opening, closing, or partially obstructing a path though the valve.
  • the material flowing through the valve may be a gas, a liquid, a fluidized solid, or slurry.
  • valves such as gate valves and globe valves.
  • a valve typically consists of several parts, such as a valve body, a bonnet, a valve member, and a valve seat.
  • the valve body and the bonnet form the casing that contains and directs material through the valve.
  • the valve body may have a bore that extends through the valve body.
  • the valve member interacts with the valve body to control the flow of material passing through the valve.
  • the valve member may be positioned to close or restrict flow through the valve body.
  • a sliding gate may be used as a valve member. The sliding gate may have an opening through the gate so that when the opening is aligned with the bore through the valve body, fluid flow through the bore is enabled.
  • the gate may be positioned so that a solid portion of the gate is aligned with the passage through the valve body, thereby blocking flow through the passage.
  • the valve member is located in a cavity in the valve body that is covered by the bonnet.
  • the bonnet also supports the valve member. During manufacture, the internal parts of the valve are put into the valve body and then the bonnet is attached to hold the valve parts together. The bonnet is removed to provide access to the internal parts of the valve during maintenance.
  • valve seat is the interior surface in the valve body that contacts the gate to form a seal.
  • the gate comes into contact with the seat when the valve is shut.
  • the body and the seat could both come in a single piece of solid material.
  • the seat could be a separate valve part that is attached or fixed to a seat pocket on the inside of the valve body.
  • the seat is a separate valve part
  • the dimensions of the seat and seat pocket must correspond or the seat will not sit properly within the seat pocket of the valve body.
  • the gate and seat may not properly seal when the valve is closed. In this event, leakage through the valve may occur.
  • seat pockets are not easy to measure.
  • Seat pockets typically are cylindrically-shaped regions formed in the passage through the valve body. The roundness of the seat pocket, as well as other surface properties, is difficult to measure or is time-consuming using conventional tools, such as calipers.
  • a technique for detecting the surface profile of a seat pocket in a bore of a gate valve is provided.
  • An inspection tool is used to detect data at a plurality of points around the seat pocket of the valve.
  • the inspection tool has a sensor that is moveable between a retracted position and an extended position.
  • the inspection tool is disposed within a valve cavity of a valve with the sensor in the retracted position.
  • the sensor of the inspection tool is then extended outward so that the sensor is located within the seat pocket of the valve having the surface profile to be detected.
  • the sensor is rotated so that the sensor may obtain surface profile data at a plurality of points around the seat pocket of the valve.
  • the sensor of the inspection tool is connected to a processor-based device, such as a computer.
  • the processor-based device processes the data from the sensor and provides it to a user in a form that is recognizable to the user.
  • FIG. 1 is a cross-sectional view of a gate valve, in accordance with an exemplary embodiment of the present technique
  • FIG. 2 is a detailed view of a portion of a seat and seat pocket of the gate valve of FIG. 1, in accordance with an exemplary embodiment of the present technique;
  • FIG. 3 is a perspective view of a seat pocket inspection tool, in accordance with an exemplary embodiment of the present technique
  • FIG. 4 is a perspective view of a sensor of the seat pocket inspection tool within the seat pocket of the gate valve of FIG. 1, in accordance with an exemplary embodiment of the present technique;
  • FIG. 5 is a partial cross-sectional view of the seat pocket inspection tool installed in the valve body with the seat pocket inspection tool rotating body/sensor in the retracted position, in accordance with an exemplary embodiment of the present technique
  • FIG. 6 is a cross-sectional view of the seat pocket inspection tool installed in the valve body with the seat pocket inspection tool rotating body/sensor in the extended position, in accordance with an exemplary embodiment of the present technique
  • FIG. 7 is a detailed view of the seat pocket inspection tool taken generally along line 7-7 of FIG. 6, in accordance with an exemplary embodiment of the present technique;
  • FIG. 8 is a top view of the seat pocket inspection tool installed in the valve body with the seat pocket inspection tool handles and rotating body/sensor in the retracted position, in accordance with an exemplary embodiment of the present technique;
  • FIG. 9 is a top view of the seat pocket inspection tool installed in the valve body with the seat pocket inspection tool handles and rotating body/sensor in the extended position, in accordance with an exemplary embodiment of the present technique.
  • FIG. 10 is a detailed cross-sectional view of the seat pocket inspection tool, in accordance with an exemplary embodiment of the present technique.
  • FIG. 1 the present invention will be described as it might be applied in conjunction with an exemplary technique, in this case a technique for detecting the surface profile of a surface within the bore of a gate valve assembly for controlling the flow of a fluid, such as oil and/or gas, and represented generally by reference numeral 20.
  • a technique for detecting the surface profile of a surface within the bore of a gate valve assembly for controlling the flow of a fluid, such as oil and/or gas represented generally by reference numeral 20.
  • the illustrated embodiment of the gate valve 20 is a grease-less valve.
  • the present technique may be used in valves other than gate valves and other than grease-less valves.
  • the gate valve assembly 20 comprises a valve body 22 having a bore 24 extending though the valve body 22.
  • the bore 24 has a first opening 26 and a second opening 28.
  • the gate valve 20 is a bidirectional valve. Therefore, the first opening 26 may be used as an inlet to the bore 24 in one configuration and as an outlet in another configuration, as can the second opening 28.
  • this embodiment of the valve 20 has a valve cavity 30 that is covered by a bonnet 32.
  • a pair of seats 34 extend into the cavity 30 from seat pockets 36 formed on opposite sides of the cavity 30 in the bore 24 through the valve body 22.
  • a gate 38 is housed in the cavity 30 between the seats 34.
  • the gate 38 has an opening 40 and a solid portion 42 that are positioned to control flow through the gate valve 20.
  • the valve 20 is open and fluids are able to pass through the bore 24 via the opening 40 in the gate 38.
  • the valve 20 is closed and fluids are blocked from flowing through the bore 24 by the solid portion 42 of the gate 38.
  • the valve 20 also has a valve stem 44 that extends through the bonnet 32 to enable a user to position the gate 38 in either the open or closed configuration.
  • a hand wheel (not shown) or some other actuator may be used to position the valve stem 44.
  • a hydraulic actuator may be used to control the position of the gate 38.
  • An electrical or pneumatic actuator may be used, as well.
  • the seat 34 has a seat seal 46 that is used to form a seal between the seat 34 and the seat pocket 36.
  • the seat seal 46 prevents flow from leaking from the bore 24 via the seat 34.
  • the seat seal 46 has a U- shaped portion 48 with a pair of sealing surfaces 50 that contact the seat pocket 36 on one side and the seat 34 on the opposite side of the seat seal 46.
  • a standoff ring 52 is provided to extend between the back face 54 of the seat pocket 36 and the U-shaped sealing portion 48 of the seat seal 46.
  • the standoff ring 52 When installed in the seat pocket 36, the standoff ring 52 abuts the seat pocket back face 54 and urges the U-shaped sealing portion 48 of the seat seal 46 outward so that the sealing surfaces 50 of the seat seal 46 make contact with the seat pocket 36 and seat 34, respectively.
  • the seat 34 has a seat spring 56 that urges the seat 34 against the gate 38.
  • the correspondence between the seat seal 46 and the seat pocket 36 enables a seal to be maintained without the use of grease.
  • the sealing surfaces 50 of the seat seal 46 may not maintain a seal. Therefore, leakage from the bore 24 may occur.
  • the surface profile of the seat pocket 36 may be too rough for a proper seal due to chatter from the machining operations used to form the seat pocket 36, incidental damage to the surface finish, or some other cause.
  • the surface profile of the seat pocket 36 may have been machined slightly or severely oval, rather than round.
  • the surface profile of the seat pocket 36 may be repaired if it is not sufficiently smooth and/or round. For example, the seat pocket 36 may be machined to re-bore the seat pocket 36.
  • a seat pocket inspection tool 58 is used to detect the surface profile of the seat pocket 36 to establish whether or not the seat pocket 36 is sufficiently smooth and/or round. If the surface profile of the seat pocket 36 is not sufficiently smooth or round, the seat pocket 36 may be repaired to correct the lack of sufficient smoothness or roundness.
  • the seat pocket inspection tool 58 is adapted to provide quantitative data regarding the surface profile of the seat pocket 36. From this data, the degree of smoothness and/or roundness of the seat pocket 36 may be established.
  • the seat pocket inspection tool 58 may provide the user with data regarding specific points on the seat pocket, such as distance from a reference point or the center of the seat pocket 36, or data regarding the seat pocket as a whole or in part, such as a percentage variation in the surface.
  • the seat pocket inspection tool 58 has a sensor 60 that is adapted to detect the distance between a surface opposite the sensor 60 and a reference point.
  • the reference point may be any point, such as the surface of the sensor 60, a point inside the sensor 60, or the center of the seat pocket 36. Alternatively, the reference point may be another point on the seat pocket 36.
  • the sensor 60 is used to detect the distance between the seat pocket 36 and the reference point at a plurality of points around the seat pocket 36 so that an overall profile of the surface of the seat pocket 36 may be established.
  • the senor 60 is a contact sensor that has a probe 62 that is adapted to produce a signal representative of the distance that the probe 62 is extended from the sensor 60.
  • the probe 62 of the sensor 60 is biased outward to engage the surface of the seat pocket 36.
  • a non-contact sensor 60 may be used in other embodiments of the present technique.
  • the sensor 60 and sensor probe 62 are housed within a radial shoe 64.
  • the data generated by the probe 62 may be configured in a plurality of different ways.
  • the seat pocket inspection tool 58 may be adjusted to identify the signal generated by the probe 62 at the first point of contact as a zero reference point.
  • the signal generated by the probe 62 will reflect the increase in distance that the probe 62 traveled. Similarly, if the profile of the seat pocket 36 is such that the probe 62 is retracted into the sensor 60 at another detection point, the signal generated by the probe 62 will reflect this decrease in travel of the probe 62.
  • the radial shoe 64 housing the sensor 60 is mounted in a rotatable body 66 adapted to rotate the sensor 60 around the seat pocket 36 of the valve body 22 to obtain data at a plurality of points around the seat pocket 36.
  • the seat pocket inspection tool 58 has an electric motor 68 that is coupled to the rotatable body 66.
  • the electric motor 68 is adapted to rotate the rotatable body 66 so that the sensor 60 is rotated around the entire cylinder of the seat pocket.
  • the seat pocket inspection tool 58 is configured to control the electric motor 68 so that the sensor 60 is stepped around the seat pocket to take periodic measurements, rather than rotating the sensor 60 continuously.
  • the seat pocket inspection tool 58 may be configured to rotate the sensor 60 in a continuous manner.
  • a profile of the surface of the seat pocket 36 may be established.
  • the distance between the sensor 60 and the reference point should remain the same as the sensor 60 travels around the seat pocket if the surface of the seat pocket is smooth and the seat pocket is round. However, if there is roughness in the surface of the seat pocket or the seat pocket is not round, the distance between the sensor 60 and the reference point will change as the sensor 60 travels around the seat pocket.
  • the data detected by the seat pocket inspection tool 58 may be presented for each point on the seat pocket 36 or for the seat pocket 36 in whole or in part. For example, the percent variation in the seat pocket 36 may be established for the seat pocket 36 as a whole based on the data collected at a plurality of points over the surface of the seat pocket 36.
  • the rotatable body 66 may be shifted between a retracted position and an extended position to facilitate installation of the seat pocket inspection tool 58 in the valve cavity 30 of the valve body 22.
  • the seat pocket inspection tool 58 may be disposed in the valve cavity 30 of the valve body 22.
  • the rotatable body 66 is extended from the main body 70 of the seat pocket inspection tool 58 to position the probe 62 into the seat pocket 36 of the valve to be inspected.
  • the seat pocket inspection tool 58 has a pair of handles 72 that are operated to position the tool 58 between the retracted position and the extended position.
  • the tool 58 has a support plate 74 that is securable to the valve to be inspected.
  • the support plate 74 has a series of holes 76 through which threaded connectors may be inserted through the support plate 74 into the valve, securing the support plate 74 to the valve and aligning the seat pocket inspection tool 58 within the valve body.
  • a series of cap screws 78 are used to secure the main body 70 of the seat pocket inspection tool 58 to the support plate 74. This configuration enables some adjustment of the tool 58 within the valve cavity of a valve so that the sensor 60 is positioned at the correct height within the seat pocket 36 of the valve 20.
  • the seat pocket inspection tool 58 is adapted to transmit its data to a processor-based device, such as a computer.
  • a wire 80 is provided to couple power to the sensor 60 and to transmit data from the sensor 60.
  • the wire 80 is coupled to a connector (not shown) that may be used to couple the seat pocket inspection tool 58 to the processor-based device.
  • FIG. 4 a detailed perspective view of the orientation of the sensor 60 within the seat pocket 36 of the valve body 22 is presented.
  • the rotatable body 66 has a square drive receptacle 82 that is used to couple the rotatable body 66 to a drive system powered by the electric motor 68.
  • the rotatable body 66 is rotated within the seat pocket 36, as represented by arrow 84, to rotate the sensor 60 around the seat pocket 36.
  • the seat pocket inspection tool 58 is inserted into the valve cavity 30 of the valve body 22, as noted above.
  • the support plate 74 is secured to threaded holes 86 in the valve body 22 using locator plugs 88.
  • the rotatable body 66 is retracted into the seat pocket inspection tool 58. Accordingly, the handles 72 are oriented forward. To extend the rotatable body 66 into the seat pocket 36 of the valve body 22, the handles 72 are rotated rearward, as represented generally by arrow 90.
  • the rotatable body 66 is extended into the seat pocket 36 of the valve body 22 to enable the sensor 60 of the seat pocket inspection tool 58 to be oriented directly opposite the surface of the seat pocket 36.
  • the probe 62 of the sensor 60 is biased outward to enable the probe 62 to obtain surface profile data from the seat pocket 36.
  • the rotatable body 66 is centered in the seat pocket 36 by a stop plate 92.
  • the stop plate 92 has a tapered surface 94 that abuts a tapered surface 96 portion of the seat pocket 36, which centers the rotatable body 66 in the seat pocket 36.
  • the square drive receptacle 82 of the rotatable body 66 is disposed over a square shaft drive 98 to enable the rotatable body 66 to telescope with the square shaft drive 98 as the rotatable body is extended and retracted.
  • the square shaft drive 98 is secured to an output shaft 100 of a right-angle gear drive 102.
  • the right-angle drive 102 has an input shaft 104 that is coupled to the electric motor 68 by a connecting rod 105.
  • the right-angle gear drive 102 converts the vertical rotation movement produced by the electric motor 68 into a horizontal rotational movement of the rotatable body 66.
  • the electric motor 68 rotates the connecting rod 105.
  • the connecting rod 105 rotates the input shaft 104 of the right-angle gear drive 102, which drives the output shaft 100 of the right-angle gear drive 102.
  • the output shaft 100 rotates the square shaft drive 98, which rotates the square drive receptacle 82, rotating the rotatable body 66.
  • the rotatable body 66 is extended and retracted by sliding the square-drive receptacle 82 of the rotatable body 66 over the square drive shaft 98.
  • a spring bar 106 is used to reposition the rotatable body 66.
  • the spring bar 106 is biased to drive the rotatable body 66 outward, but its movement is controlled by the handles 72.
  • the seat pocket inspection tool 58 has an electrical connector 108 that enables the tool 58 to be connected to a processor-based device 110 using a cable 112.
  • the processor-based device 110 is a desktop computer.
  • other processor-based devices may be used, such as a personal digital assistant.
  • the processor-based device 110 is adapted to receive data from the seat pocket inspection tool 58 and present it in a manner that may be understood by a user.
  • the data produced by the sensor 60 is transmitted to the computer via the cable 112.
  • the computer 110 processes the data and displays the results on a monitor.
  • the computer may list the distance between a point on the seat pocket and a reference point for a plurality of points around the cylinder of the seat pocket. If there is variation in the distances at the plurality of points, this is an indication that the seat pocket is not round or that the surface of the seat pocket is uneven.
  • a user retracts and extends the rotatable body 66 by positioning the handles 72 of the seat pocket inspection tool 58.
  • Each handle 72 is coupled to a tie rod 118 that is rotated whenever the handles 72 are repositioned.
  • the rotation of the tie rods 118 enables the rotatable body 66 to be extended and retracted.
  • the handles 72 and the rotatable body 66 are presented in their retracted positions.
  • the rotatable body 66 is driven forward, as represented by arrow 116.
  • the handles 72 are coupled by tie rods 118 to stop paddles 120, which control movement of the spring bar 106 and, thus, the rotatable body 66.
  • the stop paddles 120 may be maintained in both a retracted position and an extended position by detent pins 122. In FIG. 10, the stop paddles 120 are shown in the retracted position. The stop paddles 120 abut shoulders 124 of the spring bar 106.
  • the spring bar 106 is biased outward by a spring 126, thereby urging the rotatable body 66 outward into the extended position.
  • the spring 126 is a wave spring.
  • the spring 126 In the retracted position shown here, the spring 126 is compressed by the spring bar 106 and maintained in compression by the detent pins 122.
  • the detent pins 122 hold the stop paddles 120 in abutment against the shoulders 122 of the spring bar 106, preventing the spring 106 from driving the spring bar 106 outward.
  • the force exerted by the detents 62 may be overcome with manual force.
  • the tie rods 118 rotate the stop paddles 120 forward, as represented by arrows 128.
  • the force of the spring 106 drives the spring bar 106 outward, thereby driving the rotatable body 66 outward, as represented by arrow 116.
  • the detents 122 prevent the stop paddles 120 from returning to the retracted position without use of manual force.

Abstract

L'invention concerne une technique destinée à détecter le profil de surface d’une poche (36) pour siège d’un robinet-vanne. Un outil (58) de contrôle est utilisé pour détecter des données en une pluralité de points sur le pourtour de l’alésage (28) de la vanne. L’outil (58) de contrôle est doté d’un capteur (60) susceptible d’être déplacé entre une position rétractée et une position déployée. L’outil (58) de contrôle est placé à l’intérieur d’une cavité (30) du corps de vanne, le capteur (60) se trouvant en position rétractée. Le capteur (60) de l’outil (58) de contrôle est ensuite déployé vers l’extérieur de telle sorte qu’il se situe à l’intérieur de la partie de l’alésage (28) de la vanne dont le profil de surface est à détecter. On fait tourner le capteur (60) de telle sorte que le capteur (60) puisse obtenir des données de profil de surface en une pluralité de points sur le pourtour de la poche (36) pour siège du corps (22) de vanne. Le capteur (60) de l’outil (58) de contrôle est relié à un dispositif (110) basé sur un processeur, comme un ordinateur. Ledit dispositif (110) basé sur un processeur traite les données provenant du capteur (60) et les présente à un utilisateur sous une forme intelligible pour l’utilisateur.
PCT/US2009/047470 2008-06-17 2009-06-16 Outil de contrôle de poches pour sièges dans des corps de vannes WO2010008730A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1020918.7A GB2473564B (en) 2008-12-26 2009-06-16 Valve body seat pocket inspection tool
BRPI0909971A BRPI0909971A2 (pt) 2008-12-26 2009-06-16 ''ferramenta de inspeção de receptáculo de sede corpo de válvula e método para inspencionar um receptáculo de sede de um corpo de válvula''

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/140,921 2008-06-17
US12/140,921 US8087181B2 (en) 2008-12-26 2008-06-17 Valve body seat pocket inspection tool

Publications (2)

Publication Number Publication Date
WO2010008730A2 true WO2010008730A2 (fr) 2010-01-21
WO2010008730A3 WO2010008730A3 (fr) 2010-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/047470 WO2010008730A2 (fr) 2008-06-17 2009-06-16 Outil de contrôle de poches pour sièges dans des corps de vannes

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111060012A (zh) * 2019-12-30 2020-04-24 安徽瑞泰汽车零部件有限责任公司 一种汽车零部件尺寸校对装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888877A (en) * 1987-11-26 1989-12-26 Carl-Zeiss-Stiftung, Heidenhein/Brenz Articulating head for a coordinate-measuring instrument
US6155108A (en) * 1997-07-30 2000-12-05 Cobra Machine Tool Co., Inc. Valve seat insert gaging system
WO2002027270A1 (fr) * 2000-09-28 2002-04-04 Carl Zeiss Appareil de mesure de coordonnees
WO2008129305A1 (fr) * 2007-04-24 2008-10-30 Renishaw Plc Appareil et procédé de mesure de surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888877A (en) * 1987-11-26 1989-12-26 Carl-Zeiss-Stiftung, Heidenhein/Brenz Articulating head for a coordinate-measuring instrument
US6155108A (en) * 1997-07-30 2000-12-05 Cobra Machine Tool Co., Inc. Valve seat insert gaging system
WO2002027270A1 (fr) * 2000-09-28 2002-04-04 Carl Zeiss Appareil de mesure de coordonnees
WO2008129305A1 (fr) * 2007-04-24 2008-10-30 Renishaw Plc Appareil et procédé de mesure de surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111060012A (zh) * 2019-12-30 2020-04-24 安徽瑞泰汽车零部件有限责任公司 一种汽车零部件尺寸校对装置

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