阅读说明：本技术 一种狭小空间环槽内径测量装置及其使用方法 (Narrow space ring groove inner diameter measuring device and using method thereof ) 是由 于克 付婷婷 梁学双 李洪喜 成国富 刘鹏 李冬羽 赵明 于 2021-08-03 设计创作，主要内容包括：一种狭小空间环槽内径测量装置及其使用方法,涉及一种测量汽轮机补气阀阀座的环槽内径尺寸的装置及测量装置的使用方法,本发明为了解决现有阀座端面环槽内径无法准确测量的问题,滑座上加工有锥形孔、多个第一通孔和第二通孔,多个滑块滑动安装第二通孔内并关于滑座的中心对称设置,每个滑块的一端均加工有孔,另一端均加工为锥形面,每个孔内均安装有一个圆柱销,每个滑块上均加工有凹槽,每个挡销均穿过滑座上的每个第一通孔固安装在每个滑块的凹槽内,拉杆的底端固定安装有锥形块,锥形块安装在滑座的锥形孔内,且锥形块的外表面与每个滑块的锥形面相接触。本发明用于测量汽轮机补气阀阀座的环槽内径尺寸,属于测量领域。(The invention discloses a device for measuring the inner diameter of a ring groove in a narrow space and a using method thereof, and relates to a device for measuring the inner diameter of the ring groove of a steam turbine air compensating valve seat and a using method thereof, aiming at solving the problem that the inner diameter of the ring groove on the end surface of the existing valve seat can not be accurately measured, a sliding seat is provided with a tapered hole, a plurality of first through-holes and second through-hole, in a plurality of slider slidable mounting second through-holes and about the central symmetry setting of slide, the one end of every slider all processes porosely, the other end all processes to the toper face, every downthehole cylindric lock of all installing, all process the recess on every slider, every backing pin all passes every first through-hole on the slide and installs in the recess of every slider admittedly, the bottom fixed mounting of pull rod has the toper piece, the toper piece is installed in the bell mouth of slide, and the surface of toper piece contacts with the toper face of every slider. The invention is used for measuring the size of the inner diameter of a ring groove of a valve seat of a steam turbine gulp valve, and belongs to the field of measurement.)

1. The utility model provides a narrow and small space annular internal diameter measuring device which characterized in that: it comprises a sliding seat (2), a pull rod (7), a conical block (9), a plurality of sliding blocks (1), a plurality of cylindrical pins (3) and a plurality of stop pins (4),

a taper hole (2-1) is processed at the center of the sliding seat (2), a plurality of first through holes (2-2) are symmetrically processed around the taper hole (2-1), a second through hole (2-3) is processed in the sliding seat (2) along the horizontal direction, a plurality of sliding blocks (1) are slidably mounted in the second through holes (2-3) on the sliding seat (2), the sliding blocks (1) are symmetrically arranged relative to the center of the sliding seat (2), one end of each sliding block (1) is processed with the hole (1-1), a cylindrical pin (3) is fixedly mounted in each hole (1-1), the other end of each sliding block (1) is processed into a taper surface, a groove (1-2) is processed on the upper surface of each sliding block (1), the groove (1-2) is correspondingly arranged with each first through hole (2-2) on the sliding seat (2), each stop pin (4) penetrates through each first through hole (2-2) in the sliding seat (2) and is fixedly installed in a groove (1-2) of each sliding block (1), the bottom end of the pull rod (7) is fixedly provided with a conical block (9), the conical block (9) is installed in a conical hole (2-1) of the sliding seat (2), and the outer surface of the conical block (9) is in contact with the conical surface of each sliding block (1).

2. The apparatus for measuring an inner diameter of a ring groove in a narrow space of claim 1, wherein: the central axis of the second through hole (2-3) on the sliding seat (2) is vertical to the central axis of the conical hole (2-1).

3. The apparatus for measuring an inner diameter of a ring groove in a narrow space of claim 1, wherein: the novel spring assembling device further comprises a plurality of springs (5), each spring (5) is installed in the corresponding groove (1-2), and each spring (5) is located between each stop pin (4) and the side wall of the corresponding groove (1-2).

4. The apparatus for measuring an inner diameter of a ring groove in a narrow space of claim 1, wherein: the novel sliding seat is characterized by further comprising a pull rod housing (6), the pull rod (7) penetrates through the pull rod housing (6), and the bottom end of the pull rod housing (6) is fixedly connected with the upper surface of the sliding seat (2).

5. The apparatus for measuring an inner diameter of a ring groove in a narrow space of claim 1, wherein: the pull rod device is characterized by further comprising a butterfly nut (8), external threads are machined at the top end of the pull rod (7), the butterfly nut (8) is in threaded connection with the top end of the pull rod (7), and the butterfly nut (8) is located above the pull rod housing (6).

6. The apparatus for measuring an inner diameter of a ring groove in a narrow space of claim 1, wherein: the number of the sliding blocks (1), the first through holes (2-2), the cylindrical pins (3), the stop pins (4) and the springs (5) is 2.

7. The use method of the device for measuring the inner diameter of the ring groove in the narrow space is characterized in that: the method comprises the following steps:

step one, positioning;

the whole measuring device is placed into the valve shell (A) from top to bottom, the cylindrical pin (3) is inserted into a ring groove on the upper end face of the valve seat (A1), and the bottom face of the sliding seat (2) is tightly attached to the upper end face of the valve seat (A1);

step two, mounting a measuring device;

fixing the pull rod housing (6) by hand, enabling the bottom surface of the sliding seat (2) to be always tightly attached to the valve seat (A1), simultaneously clockwise rotating the butterfly nut (8), pulling the pull rod (7) to move upwards, enabling each sliding block (1) to slide outwards until the butterfly nut (8) is screwed, enabling the outer side wall of each cylindrical pin (3) to be tightly attached to the inner wall of each ring groove on the upper end surface of the valve seat (A1), and completing installation of the measuring device;

step three, measuring the inner diameter of the ring groove;

and (5) taking out the measuring device installed in the step two, and measuring the size (S) between the outer side walls of the two cylindrical pins (3) by using an outer micrometer or an outer caliper, so that the measurement is completed.

Technical Field

The invention particularly relates to a device for measuring the inner diameter size of a ring groove of a valve seat of a steam turbine gulp valve and a using method of the measuring device, and belongs to the field of measurement.

Background

Certain type steam turbine gulp valve's disk seat is interference fit with the valve casing, and the disk seat passes through liquid nitrogen shrinkage and assembles back in the valve casing, and the annular size shrink of disk seat up end because annular internal diameter size and valve disc fit tolerance are very strict and the size has changed after the assembly, need actually detect disk seat terminal surface annular internal diameter size again after the assembly, according to this size to match the processing valve disc, guarantees the cooperation requirement of disk seat and valve disc. Because the valve seat assembly position is darker apart from the outside degree of depth of valve casing, and valve casing inner space is narrow and small, and personnel operating space is not enough, and current measuring tool can't deepen the inside direct measurement that carries on of valve casing.

Disclosure of Invention

The invention provides a device for measuring the inner diameter of a circular groove in a narrow space and a using method thereof, aiming at solving the problem that the inner diameter of the circular groove on the end surface of the existing valve seat cannot be accurately measured.

The technical scheme adopted by the invention is as follows:

it comprises a sliding seat, a pull rod, a conical block, a plurality of sliding blocks, a plurality of cylindrical pins and a plurality of stop pins, wherein a conical hole is processed at the center of the sliding seat, a plurality of first through holes are symmetrically processed around the conical hole, a second through hole is processed in the sliding seat along the horizontal direction, the sliding blocks are arranged in the second through hole on the sliding seat in a sliding way, and a plurality of sliders are arranged about the central symmetry of the slide, one end of each slider is processed with a hole, each hole is internally and fixedly provided with a cylindrical pin, the other end of each slider is processed with a conical surface, the upper surface of each slider is processed with a groove, the grooves are correspondingly arranged with each first through hole on the slide, each stop pin penetrates through each first through hole on the slide and is fixedly arranged in the groove of each slider, the bottom fixed mounting of the pull rod is provided with a conical block, the conical block is arranged in the conical hole of the slide, and the outer surface of the conical block is contacted with the conical surface of each slider.

Has the advantages that:

the measuring method changes direct measurement into indirect measurement by converting a measuring object, a conical block is arranged at the bottom end of a pull rod, the conical block is matched with a conical surface at one end of a sliding block, the sliding block is driven to move in a sliding seat by pushing and pulling the pull rod, a spring is arranged on the sliding block, the measured sliding block is automatically reset by the spring, the inner diameter of a circular groove is converted to the outer diameter of two cylindrical pins symmetrically arranged by a measuring device, the outer diameter of the two cylindrical pins of the measuring device is measured by an outer micrometer or an outer caliper, and the actual size of the inner diameter of the circular groove in a narrow space can be obtained. The invention realizes the accurate measurement of the inner diameter of the inner ring groove in a narrow space and simultaneously ensures the matching requirement of the valve seat and the valve disc. The measuring device is flexible, convenient and practical to use and operate, and the measured data is accurate and reliable.

Drawings

FIG. 1 is a schematic view of the present measuring device;

FIG. 2 is a front sectional view of the measuring device;

FIG. 3 is a schematic view of the position of the inner diameter measurement of the seat ring groove;

FIG. 4 is a measurement transfer schematic;

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 4, and the narrow space ring groove inner diameter measuring device in the embodiment includes a sliding seat 2, a pull rod 7, a tapered block 9, a plurality of sliding blocks 1, a plurality of cylindrical pins 3 and a plurality of stop pins 4, wherein a tapered hole 2-1 is processed at the center of the sliding seat 2, the tapered hole 2-1 is used for installing the tapered block 9, the tapered hole 2-1 and the tapered block 9 are both narrow at the top and wide at the bottom, and the sliding seat 2 provides guidance for the sliding block 1 on one hand and plays a role in positioning the whole measuring device on a valve seat a1 on the other hand; a plurality of first through holes 2-2 are symmetrically processed around the conical hole 2-1, each first through hole 2-2 is used for placing a stop pin 4, a second through hole 2-3 is processed in the sliding seat 2 along the horizontal direction, a plurality of sliding blocks 1 are slidably mounted in the second through holes 2-3 on the sliding seat 2, the sliding blocks 1 are symmetrically arranged about the center of the sliding seat 2, one end of each sliding block 1 is processed with the conical surface 1-1, a cylindrical pin 3 is fixedly mounted in each hole 1-1, the sliding block 1 drives the cylindrical pin 3 on the sliding block to slide in the sliding seat 2, the cylindrical pin 3 is a direct object part for converting the inner diameter of a ring groove, the other end of each sliding block 1 is processed into the conical surface, a groove 1-2 is processed on the upper surface of each sliding block 1, the groove 1-2 is correspondingly arranged with each first through hole 2-2 on the sliding seat 2, every backing pin 4 all passes every first through-hole 2-2 fixed mounting on slide 2 in the recess 1-2 of every slider 1, backing pin 4 provides the location for spring 5, the bottom fixed mounting of pull rod 7 has toper piece 9, toper piece 9 is installed in the bell mouth 2-1 of slide 2, and the surface of toper piece 9 contacts with the toper face of every slider 1, pull rod 7 utilizes wedge principle with the toper piece 9 of its bottom to drive slider 2 and outwards slide to drive cylindric lock 3 and remove, make it lean on tightly on the internal diameter of annular, this measuring device is operated in valve casing A outside.

The second embodiment is as follows: the embodiment is described with reference to fig. 1 to 4, and the device for measuring the inner diameter of the ring groove in the narrow space has the advantages that the central axis of the second through hole 2-3 on the sliding seat 2 is perpendicular to the central axis of the tapered hole 2-1, so that the relative position of the tapered block 9 at the bottom end of the pull rod 7 and each slide block 1 is ensured, and the pull rod 7 can drive the slide blocks 2 to slide outwards when in use, thereby completing accurate measurement.

The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 4, and the device for measuring the inner diameter of the ring groove in a narrow space further includes a plurality of springs 5, the springs 5 provide elastic force for the contraction of the slider 1, so that the device can automatically return to the original shape after use, and is convenient to use, each spring 5 is installed in a groove 1-2, each spring 5 is located between each stop pin 4 and the side wall of the groove 1-2, and the rest is the same as the first or second embodiment.

The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 4, and the device for measuring the inner diameter of the ring groove in the narrow space further includes a pull rod housing 6, the pull rod 7 is inserted into the pull rod housing 6, the bottom end of the pull rod housing 6 is fixedly connected with the upper surface of the slide carriage 2, the pull rod housing 6 provides support for the pull rod 7, the length of the pull rod housing 6 is smaller than that of the pull rod 7, so that the pull rod 7 can be conveniently stretched and fixed, and the other embodiments are the same as the first, second or third embodiment.

The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 to 4, and the device for measuring the inner diameter of the ring groove in the narrow space further includes a wing nut 8, an external thread is processed at the top end of the pull rod 7, the wing nut 8 is connected with the top end of the pull rod 7 through a thread, the wing nut 8 is located above the pull rod housing 6, the wing nut 8 is used for tensioning the pull rod 7, after the pull rod 7 is adjusted to a proper position, the pull rod 7 is fixed by the wing nut 8, the bottom end of the wing nut 8 abuts against the top end of the pull rod housing 6, and the rest is the same as the first, second, third or fourth embodiment.

The sixth specific implementation mode: in the embodiment described above with reference to fig. 1 to 4, the number of the slider 1, the first through hole 2-2, the cylindrical pin 3, the stopper pin 4, and the spring 5 is 2, and the number of the slider is set to correspond to the inner diameter of the valve seat a1, and the other embodiments are the same as the first, second, third, fourth, or fifth embodiments.

The seventh embodiment: the present embodiment is described with reference to fig. 1 to 4, and a method for using a device for measuring an inner diameter of a ring groove in a narrow space according to the present embodiment includes the following steps:

step one, positioning;

the whole measuring device is placed into the valve shell A from top to bottom, so that the cylindrical pin 3 is inserted into the annular groove on the upper end face of the valve seat A1, and the bottom face of the sliding seat 2 is tightly attached to the upper end face of the valve seat A1;

step two, mounting a measuring device;

fixing the pull rod housing 6 by hand, enabling the bottom surface of the sliding seat 2 to be tightly attached to the valve seat A1 all the time, simultaneously rotating the butterfly nut 8 clockwise, pulling the pull rod 7 to move upwards, enabling each sliding block 1 to slide outwards until the butterfly nut 8 is screwed, enabling the outer side wall of each cylindrical pin 3 to be tightly attached to the inner wall of each annular groove on the upper end surface of the valve seat A1, and completing installation of the measuring device;

step three, measuring the inner diameter of the ring groove;

and (4) taking out the measuring device installed in the step two, and measuring the dimension S between the outer side walls of the two cylindrical pins 3 by using an outer micrometer or an outer caliper, wherein the dimension S is the actual dimension of the end surface ring groove inner diameter of the valve seat A1, so that the measurement is completed.