On-site valve pulling test instrument for high-pressure steam valve

Abstract

The utility model discloses a high-pressure steam valve on-site pull valve test instrument, which relates to the field of pull valve test instruments and comprises an instrument main body, the instrument main body is movably sleeved inside an outer protective shell, and side blocks are fixedly connected to two sides of the bottom of the instrument main body. The side blocks move in first sliding grooves reserved in the two side plates of the outer protection shell, and vertical rods are fixedly connected to the inner walls of the first sliding grooves and penetrate through the interiors of the side blocks. The whole instrument main body is driven to ascend by shifting the side blocks fixedly connected to the two sides of the instrument main body, so that a display interface and a control button of the instrument main body are exposed, a worker can operate the instrument main body conveniently, and meanwhile, the instrument main body is shifted subsequently to descend and retract into the outer protective shell; therefore, when the instrument main body is not used, the outer protective shell can protect the whole instrument main body in all directions, and the service life of the whole instrument main body is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of valve pulling test instruments, and particularly relates to a local valve pulling test instrument for high-pressure steam valves. Background Technique

[0002] The valve pulling test is a static test of the regulating system. The valve pulling test is generally carried out before the unit starts after major or minor repairs of the steam turbine, or after the regulating system is overhauled. The quality of valve linearity directly affects problems such as the stable operation of the unit after grid connection and load fluctuations. Therefore, the valve pulling test requires that the static action of the regulating system is reliable and flexible, and the correspondence between the control signal and the valve stroke meets the requirements; the valve pulling test is a static test of the regulating system, and the purpose is to check the valve characteristic parameters of the control valve. If the deviation between the valve command and the feedback is large, the cause needs to be found. If the servo valve is stuck, the servo valve needs to be adjusted or flushed and replaced.

[0003] In the existing operation of the valve pulling test for overhauling the steam turbine, a voltmeter is used for on-site detection. One end of the power cord is connected to the voltmeter wiring port, and the other end is connected to the plug of the servo valve (two parallel connection methods of the servo valve plugs). When it is necessary to pull the valve or judge whether the valve system is faulty, the on-line servo valve plug is unplugged, and the plug of the voltmeter test instrument is inserted into the servo valve interface. The switch is started, and the voltage is adjusted to 5V. In the maintenance position, when opening the valve, it is turned to the positive direction, and vice versa; when pulling the valve back and forth, the action is flexible, and the problem of the thermal signal source can be judged; if the action is inflexible, sluggish, and the zero deviation increases, etc., it can be judged that there is internal jamming of the servo valve, the resolution of the valve becomes poor, and other non-linear factors, and the servo valve needs to be replaced.

[0004] The above detection device still has the following problems when in use: when the above voltmeter detection device is in use, there is no good protection work for the voltmeter detection instrument. In this way, when the instrument body is not in use, it cannot protect the surrounding of the instrument in all directions, affecting the service life of the entire instrument.

[0005] Therefore, it is very necessary to invent a local valve pulling test instrument for high-pressure steam valves to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a local valve pulling test instrument for high-pressure steam valves to solve the problems put forward in the above background technique.

[0007] In order to achieve the above purpose, the utility model provides the following technical solution: a local valve pulling test instrument for high-pressure steam valves, including an instrument body, the instrument body is movably sleeved inside an outer protective shell, and both sides of the bottom of the instrument body are fixedly connected with side blocks, and the side blocks are movable inside the first chutes reserved on both side plates of the outer protective shell. The inner wall of the first chute is fixedly connected with a vertical rod, and the vertical rod penetrates through the inside of the side block. It also includes:

[0008] The buckle assembly is provided with a second slide groove inside the outer protective shell, and a slider is movably connected to the inside of the second slide groove through a spring, and the sharp corner of the slider away from the spring is matched with the second sharp-mouth groove reserved inside the vertical pole.

[0009] Preferably, the two sides of the side block are not in contact with the two side walls of the slide groove, and the four edges on the two sides of the side block are in contact with and slidably connected with the inclined surface of the sharp corner of the end of the slider, so that when the side block moves upward, the two edges on the top of the side block can support the inclined surface of the sharp corner bottom of the slider, thereby pushing the slider to move;

[0010] A square through hole is reserved inside the side block, and the inner wall of the through hole is in contact with the outer wall of the vertical rod and is slidably connected up and down to stabilize the lifting movement of the entire side block.

[0011] Preferably, a pointed groove 1 is reserved at the end of the side block near the inner wall on both sides of the slide groove, and the pointed groove 1 matches the sharp corner reserved at the end of the slider, and the pointed groove 1 is connected to the through hole, so that the sharp corner can be matched with the pointed groove 1 and the pointed groove 2 in sequence.

[0012] Preferably, a protrusion is fixedly connected to the center position above the end of the slider away from the sharp corner, and the slider and the protrusion are in a "convex" shape as a whole, and the outer walls of the slider and the protrusion are in contact with the inner wall of the "convex" shaped slide groove and are slidably connected to ensure the stability of the slider movement.

[0013] Preferably, the tip of the sharp corner at one-third of the point matches with the sharp-mouthed grooves 2 reserved on both sides of the upper half of the vertical pole, so that the sharp corner of the slider successively matches with the sharp-mouthed groove 1 reserved in the side block and the sharp-mouthed grooves 2 reserved on both sides of the vertical pole, thereby limiting the position of the entire side block and the instrument body.

[0014] Preferably, one end of the spring is fixedly connected to the inner wall of the second slide groove, and the other end of the spring is fixedly connected to the end of the slider located inside the second slide groove, so as to facilitate the reset movement of the slider to match the first pointed groove reserved in the side block and the second pointed groove reserved on both sides of the vertical rod.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] The utility model drives the entire instrument body to move upward by toggling the side blocks fixedly connected on both sides of the instrument body, so that the display interface and control buttons of the instrument body are exposed, which is convenient for the staff to operate the instrument body. At the same time, the side blocks are subsequently toggled to mobilize the instrument body to descend and retract back into the outer protective shell. In this way, when the instrument body is not in use, the outer protective shell can provide all-round protection for the entire instrument body, thereby extending the service life of the entire instrument body.

[0017] When the side block is toggled to move upward, the edges on both sides of the top of the side block abut against the inclined surfaces at the lower ends of the sharp corners, thereby causing the entire slider to be forced to move into the second chute. Then, with the upward movement of the side block and under the action of the spring force, the sharp corners of the slider successively match the first pointed nozzle groove reserved in the side block and the second pointed nozzle groove reserved on both sides of the vertical rod, thus restricting the positions of the entire side block and the instrument body. At this time, it is convenient to use the instrument body. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional view of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 Schematic enlarged view of the structure at A;

[0021] Figure 3 It is a three-dimensional view of the overall structure in which the instrument body of the present invention is retracted into the inner part of the outer protective shell;

[0022] Figure 4 It is an exploded view of the overall structure of the present invention;

[0023] Figure 5 It is a three-dimensional view of the outer protective shell (in a partially cut state) of the present invention;

[0024] Figure 6 For the present invention Figure 5 Schematic enlarged view of the structure at B;

[0025] Figure 7 It is an exploded view of the outer protective shell (in a partially cut state) and the vertical rod of the present invention;

[0026] Figure 8 It is a three-dimensional view of the overall structure of the side block of the present invention.

[0027] Description of the Reference Numerals:

[0028] 1. Instrument body; 2. Outer protective shell; 3. Side block; 31. Through hole; 32. First pointed nozzle groove; 4. First chute; 5. Vertical rod; 6. Buckling assembly; 61. Second chute; 62. Slider; 621. Convex block; 63. Spring; 64. Sharp corner; 65. Second pointed nozzle groove. Detailed Embodiments

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The utility model provides Figure 1-8 The high-pressure steam valve in-situ pull valve test instrument shown in the figure comprises an instrument body 1, the instrument body 1 is movably mounted inside an outer protective shell 2, and side blocks 3 are fixedly connected to both sides of the bottom of the instrument body 1, and the side blocks 3 move inside a slide groove 4 reserved at the two side plates of the outer protective shell 2, and the inner wall of the slide groove 4 is fixedly connected to a vertical rod 5, and the vertical rod 5 runs through the inside of the side block 3, and also includes:

[0031] The buckle assembly 6 has a second slide groove 61 reserved inside the outer protective shell 2, and the inside of the second slide groove 61 is movably connected with a slider 62 through a spring 63, and the sharp corner 64 set at the end of the slider 62 away from the spring 63 matches the second pointed groove 65 reserved inside the vertical rod 5.

[0032] The two sides of the side block 3 are not in contact with the two side walls of the slide groove 1 4, and the four edges on the two sides of the side block 3 are in contact with the inclined surface of the sharp corner 64 at the end of the slider 62 and are slidably connected, so that when the side block 3 moves upward, the two edges on the top of the side block 3 can support the inclined surface at the bottom of the sharp corner 64 of the slider 62, thereby pushing the slider 62 to move;

[0033] A square through hole 31 is reserved inside the side block 3 , and the inner wall of the through hole 31 is in contact with the outer wall of the vertical rod 5 and is slidably connected up and down to stabilize the lifting movement of the entire side block 3 .

[0034] A pointed groove 32 is reserved at the end of the side block 3 near the inner wall of both sides of the slide groove 4, and the pointed groove 32 matches the sharp corner 64 reserved at the end of the slider 62, and the pointed groove 32 is connected to the through hole 31, so that the sharp corner 64 is matched with the pointed groove 32 and the pointed groove 65 in turn.

[0035] A protrusion 621 is fixedly connected to the center position above the end of the slider 62 away from the sharp corner 64, and the slider 62 and the protrusion 621 are in a "convex" shape as a whole. The outer walls of the slider 62 and the protrusion 621 are in contact with the inner wall of the "convex" shaped slide groove 61 and are slidably connected to ensure the stability of the movement of the slider 62.

[0036] The tip of the sharp corner 64 is matched with the sharp-mouthed groove 65 reserved on both sides of the upper half of the vertical rod 5, so that the sharp corner 64 of the slider 62 can be matched with the sharp-mouthed groove 32 reserved in the side block 3 and the sharp-mouthed groove 65 reserved on both sides of the vertical rod 5 in turn, thereby limiting the position of the entire side block 3 and the instrument body 1.

[0037] One end of the spring 63 is fixedly connected to the inner wall of the second slide groove 61, and the other end of the spring 63 is fixedly connected to the end of the slider 62 located inside the second slide groove 61, so as to facilitate the reset movement of the slider 62 to match the pointed groove 32 reserved in the side block 3 and the pointed groove 65 reserved on both sides of the vertical rod 5.

[0038] Working principle: When using a high-pressure steam valve in-situ valve pulling test instrument, first when using the instrument body 1, by moving the side blocks 3 fixedly connected on both sides of the instrument body 1 in the slide groove 4 reserved in the outer protective shell 2 upward, the entire instrument body 1 is driven to move upward, and the vertical rod 5 runs through the inside of the side block 3 to ensure the stability of the entire side block 3 and the instrument body 1 in the upward movement, so that the display interface and control buttons of the instrument body 1 are exposed from the outer protective shell 2, which is convenient for the staff to operate the instrument body 1. When the side block 3 is moved to drive the instrument body 1 fixedly connected to the side block 3 to move upward, the edges on both sides of the top of the side block 3 support the inclined surface of the lower end of the sharp corner 64, and the slider 62 only It can only move in the horizontally arranged slide groove 2 61, so that the upward force of the side block 3 pushes the slider 62 to move into the slide groove 2 61. During the movement of the slider 62, the spring 63 fixedly connected to the end of the slider 62 is forced to deform the spring 63. Then, as the side block 3 rises, the pointed mouth groove 1 32 reserved inside the side block 3 moves to the same horizontal position as the sharp corner 64, and under the action of the spring 63, the spring 63 pushes the sharp corner 64 of the slider 62 to match the pointed mouth groove 1 32 reserved in the side block 3 and the pointed mouth groove 2 65 reserved on both sides of the vertical rod 5 in turn, so that the position of the entire side block 3 and the instrument body 1 is limited, and the instrument body 1 is convenient to use at this time;

[0039] At the same time, after the test is completed, the instrument body is continued to move the side block 3 to mobilize the instrument body 1 to descend and retract into the outer protective shell 2. Similarly, the above operation steps are repeated, and force is applied to move the side block 3 downward. The side block 3 drives the instrument body 1 fixedly connected to the side block 3 to descend and be stored inside the outer protective shell 2. In this way, when the instrument body 1 is not in use, the outer protective shell 2 can provide all-round protection for the entire instrument body 1, thereby extending the service life of the entire instrument body 1.

[0040] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-pressure steam valve on-site valve pulling test instrument, comprising an instrument main body (1), characterized in that, The main body of the instrument (1) is movably sleeved inside the outer protective shell (2), and side blocks (3) are fixedly connected to both sides of the bottom of the main body of the instrument (1). Moreover, the side blocks (3) are movable inside the first sliding grooves (4) reserved at both side plates of the outer protective shell (2). The inner wall of the first sliding groove (4) is fixedly connected with a vertical rod (5), and the vertical rod (5) penetrates through the inside of the side block (3). Further included are: A fastening component (6), a second sliding groove (61) is reserved inside the outer protective shell (2), and a slider (62) is movably connected inside the second sliding groove (61) through a spring (63). Moreover, a sharp corner (64) provided at the end of the slider (62) away from the spring (63) is matched with a sharp nozzle groove two (65) reserved inside the vertical rod (5); The two sides of the side block (3) are not in contact with the two side walls of the first sliding groove (4), and the four edges on both sides of the side block (3) are in contact with and slidably connected to the inclined surfaces of the sharp corners (64) at the ends of the slider (62); A square through hole (31) is reserved inside the side block (3), and the inner wall of the through hole (31) is attached to and slidably connected to the outer wall of the vertical rod (5) up and down; Sharp nozzle grooves one (32) are reserved at the ends of the side block (3) close to the two inner walls of the first sliding groove (4). Moreover, the sharp nozzle grooves one (32) are matched with the sharp corners (64) reserved at the ends of the slider (62), and the sharp nozzle grooves one (32) are communicated with the through hole (31); A convex block (621) is fixedly connected to the middle position above the end of the slider (62) away from the sharp corner (64). Moreover, the slider (62) and the convex block (621) as a whole are in a "convex" shape, and the outer walls of both the slider (62) and the convex block (621) are attached to and slidably connected to the inner wall of the "convex"-shaped second sliding groove (61).

2. The on-site valve pulling test instrument for high-pressure steam valves according to claim 1, characterized in that, The tip of the sharp corner (64) at one-third of its length is matched with the sharp nozzle grooves two (65) reserved on both sides of the upper half of the vertical rod (5).

3. The on-site valve pulling test instrument for a high-pressure steam valve according to claim 1, characterized in that, One end of the spring (63) is fixedly connected to the inner wall of the second sliding groove (61), and the other end of the spring (63) is fixedly connected to the end of the slider (62) located inside the second sliding groove (61).

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