Pneumatic control valve precision measuring tool

Abstract

The utility model relates to the technical field of pneumatic control valves, in particular to a pneumatic control valve precision measuring tool, which is mounted on a support through a connecting seat, a detection rod is slidably connected with a main ruler through a vernier scale, and the detection rod is in contact with the upper part of a fixed clamping block. The push rod drives the valve rod to move through the fixed clamping block and drives the detection rod to move through the fixed clamping block, the current displacement of the valve is read by the measuring scale, and the basic error, the return difference and the dead zone of the valve are measured. By adjusting the mounting height of the measuring scale, the measuring range of the measuring scale can be adaptively adjusted according to the stroke interval of the fixed clamping block, and the measuring range of the measuring tool is effectively expanded; the measuring tool is directly lapped above the fixed clamping block through the detection rod, the detection rod moves up and down along with the fixed clamping block to read the movement stroke of the valve, and compared with a traditional measuring scale measuring method, the measuring result is more accurate through a direct measuring mode of the detection rod.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic control valves, in particular to a precision measurement tooling for pneumatic control valves. Background Technique

[0002] In an industrial automation control system, as a key control element, the pneumatic control valve is widely used in fields such as chemical industry, petroleum, electric power, and metallurgy. Its main function is to precisely control the production process by adjusting parameters such as the flow rate, pressure, and temperature of the fluid medium. According to the regulations of the national standard GB / T4213, in the performance evaluation of pneumatic control valves, precision measurement is an essential part, specifically including the detection of basic error, hysteresis, and dead zone. These indicators are directly related to the stability of the production process and the uniformity of product quality.

[0003] Currently, the push rod of the pneumatic actuator is connected to the valve stem of the pneumatic control valve through a fixed clamp block. The up and down movement of the push rod drives the valve stem to perform corresponding actions. The stroke measurement of the pneumatic control valve depends on the connection structure between the valve stem of the control valve and the push rod of the pneumatic actuator. The valve stem of the pneumatic control valve is completely fixed by the fixed clamp block. The particularity of this connection structure makes it impossible to directly measure the stroke of the pneumatic control valve by measuring the extended height of the valve stem. Only the stroke can be roughly read through the pointer on the fixed clamp block and the stroke indicator plate. This method has a large error and is difficult to meet the requirements of high-precision measurement.

[0004] During the precision detection process, the pneumatic control valve lacks a dedicated position for directly measuring the stroke and a suitable measuring tool. When using a common height gauge for measurement, the first problem faced is the difficulty in fixing the measuring tool. Secondly, the height gauge is also easily interfered by the head of the pneumatic actuator (regardless of whether it is a diaphragm type or a piston type, its head diameter is relatively large) during the measurement process, resulting in inaccurate measurement. For small-bore pneumatic control valves, due to limited measurement space, conventional measuring tools such as height gauges are not convenient to use, further increasing the measurement difficulty.

[0005] The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present disclosure and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a precision measurement tooling for pneumatic control valves aiming at the defects existing in the prior art, so as to improve the precision and efficiency of the performance evaluation of pneumatic control valves.

[0007] To achieve the above object, the technical solution adopted by the utility model is: a pneumatic control valve precision measurement tooling, comprising: a connecting seat, a measuring ruler and a detection rod. The measuring ruler is vertically arranged on the connecting seat and is slidably connected thereto. The detection rod is slidably connected to the measuring ruler.

[0008] An installation hole is provided on the connecting seat. The installation hole and the measuring ruler are respectively arranged on both sides of the connecting seat. A first limit tightening screw is provided on the connecting seat corresponding to the measuring ruler.

[0009] The measuring ruler includes a main ruler and a vernier scale arranged thereon. A collar is provided on the vernier scale. The detection rod is slidably connected to the collar. A second limit tightening screw is provided on the vernier scale corresponding to the main ruler. A third limit tightening screw is provided on the collar corresponding to the detection rod.

[0010] Further, the connecting seat includes a mounting plate and an adjusting plate slidably connected thereto. The installation hole and the measuring ruler are respectively arranged on the mounting plate and the adjusting plate.

[0011] A first adjusting hole is provided on the mounting plate along the direction away from the installation hole. The adjusting plate is slidably connected to the first adjusting hole through a fixing screw provided thereon.

[0012] Further, two first adjusting holes are arranged in parallel.

[0013] Further, a second adjusting hole is provided on the adjusting plate corresponding to the first adjusting hole. The second adjusting hole is arranged in parallel with the first adjusting hole. The fixing screw is installed at the second adjusting hole.

[0014] Further, a first limit hole is provided at the edge of the side of the adjusting plate away from the installation hole. The main ruler is slidably connected to the first limit hole. The first limit tightening screw is arranged corresponding to the first limit hole.

[0015] Further, the detection rod is arranged in an L shape and includes a vertical rod and a horizontal rod. The vertical rod is slidably connected to the collar and is tightly fixed by a third limit tightening screw. The horizontal rod is arranged in parallel with the first adjusting hole.

[0016] Further, a measuring claw is provided at one end of the horizontal rod away from the vertical rod. The measuring claw is slidably connected to the horizontal rod through a connecting sleeve and is tightly fixed by a fourth limit tightening screw provided on the connecting sleeve.

[0017] Further, the connecting sleeve is sleeved at the connection part of the horizontal rod and the measuring claw. A gasket is provided inside the connecting sleeve corresponding to the fourth limit tightening screw.

[0018] Further, through holes are provided in the mounting plate corresponding to the installation positions of the regulating valves, and a plurality of mounting holes are evenly arranged along the circumferences of the through holes.

[0019] The beneficial effects of the present utility model are as follows:

[0020] In this application, the measuring tooling is fixedly connected to the inner bottom of the bracket through a connecting seat, the detection rod is slidably connected to the main scale through a vernier scale, the detection rod contacts the upper part of the fixed clamping block. When the regulating valve adjusts the valve opening according to the given signal, the push rod drives the valve stem to move through the fixed clamping block. At this time, the detection rod moves up and down with the fixed clamping block, and the current displacement of the valve is read through the measuring scale, realizing the measurement of the basic error, hysteresis, and dead zone of the valve.

[0021] The measuring scale is vertically arranged on the connecting seat and its installation height is adjusted in cooperation with the first tightening bolt, so that the measuring range of the measuring scale can be adaptively adjusted according to the stroke range of the fixed clamping block, effectively expanding the measuring range of the measuring tooling; the measuring tooling directly overlaps above the fixed clamping block through the detection rod, and the movement stroke of the valve is read through the up and down movement of the detection rod with the fixed clamping block. Compared with the traditional method of reading the stroke through a measuring ruler or a pointer and a stroke indicator board, the method of directly measuring through the detection rod makes the measurement result more accurate. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the front view of the pneumatic regulating valve precision measuring tooling in the present utility model;

[0024] Figure 2 It is the structural schematic diagram of the pneumatic regulating valve precision measuring tooling in the present utility model;

[0025] Figure 3 It is the structural schematic diagram of the pneumatic regulating valve measuring tooling in the present utility model;

[0026] Figure 4 It is the measuring schematic diagram of the measuring tooling on the diaphragm type pneumatic regulating valve in the present utility model;

[0027] Figure 5 It is the measuring schematic diagram of the measuring tooling on the piston type pneumatic regulating valve in the present utility model.

[0028] Reference numerals: 1, connecting seat; 11, mounting plate; 111, through hole; 112, mounting hole; 113, first adjustment hole; 12, adjustment plate; 121, second adjustment hole; 122, first limiting hole; 123, first limiting and tightening screw; 124, fixing screw; 2, measuring scale; 21, main scale; 22, vernier scale; 221, second limiting and tightening screw; 23, ferrule; 231, third limiting and tightening screw; 3, detection rod; 31, vertical rod; 32, horizontal rod; 33, measuring claw; 34, connecting sleeve; 341, fourth limiting and tightening screw; 342, gasket. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] As Figures 1 to 5 shown, a pneumatic control valve accuracy measurement tooling includes a connecting seat 1, a measuring scale 2 and a detection rod 3. The measuring scale 2 is vertically arranged on the connecting seat 1 and is slidably connected thereto. The detection rod 3 is slidably connected to the measuring scale 2. A mounting hole 112 is provided on the connecting seat 1. The mounting hole 112 and the measuring scale 2 are respectively arranged on both sides of the connecting seat 1. A first limiting and tightening screw 123 is provided on the connecting seat 1 corresponding to the measuring scale 2. The measuring scale 2 includes a main scale 21 and a vernier scale 22 arranged thereon. A ferrule 23 is provided on the vernier scale 22. The detection rod 3 is slidably connected to the ferrule 23. A second limiting and tightening screw 221 is provided on the vernier scale 22 corresponding to the main scale 21. A third limiting and tightening screw 231 is provided on the ferrule 23 corresponding to the detection rod 3.

[0033] In this application, as Figure 4 andFigure 5 As shown in the figure, a bracket is provided between the pneumatic actuator and the valve cover of the regulating valve. The push rod of the pneumatic actuator is connected to the valve stem of the regulating valve through a fixed clamp. During the use of the measuring tooling, the measuring tooling is fixedly connected to the bracket through the connecting seat 1. The detection rod 3 is slidably connected to the main scale 21 through the vernier 22. The detection rod 3 contacts the upper part of the fixed clamp. When the regulating valve adjusts the valve opening according to the given signal, the push rod drives the valve stem to move through the fixed clamp. At this time, the detection rod 3 moves up and down with the fixed clamp, and the current displacement of the valve is read through the measuring scale 2, realizing the measurement of the basic error, hysteresis and dead zone of the valve.

[0034] The measuring scale 2 is vertically arranged on the connecting seat 1 and its installation height is adjusted by cooperating with the first tightening bolt, so that the measuring range of the measuring scale 2 can be adaptively adjusted according to the stroke interval of the fixed clamp, effectively expanding the measuring range of the measuring tooling; the measuring tooling is directly lapped above the fixed clamp through the detection rod 3, and the movement stroke of the valve is read through the up and down movement of the detection rod 3 with the fixed clamp. Compared with the traditional method of reading the stroke through a measuring scale or a pointer and a stroke indicator board, the method of directly measuring through the detection rod 3 makes the measurement result more accurate.

[0035] In this embodiment, as Figure 2 shown, the connecting seat 1 includes a mounting plate 11 and an adjusting plate 12 slidably connected thereto. The mounting hole 112 and the measuring scale 2 are respectively arranged on the mounting plate 11 and the adjusting plate 12; a first adjusting hole 113 is opened on the mounting plate 11 in a direction away from the mounting hole 112, and the adjusting plate 12 is slidably connected to the first adjusting hole 113 through the fixing screw 124 provided thereon.

[0036] The connecting seat 1 is fixedly connected to the bracket through the mounting plate 11. The measuring scale 2 is installed on the mounting plate 11 through the adjusting plate 12 and the distance between the measuring scale 2 and the bracket is adjusted through the adjusting plate 12. The setting of the first adjusting hole 113 enables the measuring tooling to adjust the outward extension distance of the adjusting plate 12 on the mounting plate 11 according to the measuring space, and cooperate with the fixing screw 124 to fix the adjusting plate 12 after the adjustment is completed, maintaining the stability of the spatial position of the measuring scale 2 and ensuring the smooth and accurate measurement process of the measuring scale 2.

[0037] A through hole 111 is opened on the mounting plate 11 corresponding to the installation position of the regulating valve, and a plurality of mounting holes 112 are circumferentially arranged along the through hole 111; the mounting holes 112 are correspondingly opened with the bolt holes of the bracket connecting the valve cover of the regulating valve, facilitating the fixed connection between the mounting plate 11 and the bracket.

[0038] Preferably, in the above embodiment, two first adjusting holes 113 are arranged in parallel. The two first adjusting holes 113 arranged in parallel make the movement adjustment process of the adjusting plate 12 relative to the mounting plate 11 smoother.

[0039] Further, a second adjustment hole 121 is provided on the adjustment plate 12 corresponding to the first adjustment hole 113. The second adjustment hole 121 is arranged parallel to the first adjustment hole 113, and the fixing screw 124 is installed at the second adjustment hole 121. The second adjustment hole 121 provided on the adjustment plate 12 facilitates the installation of the fixing bolt and the knob operation by the operator during the fine adjustment of the position of the measuring scale 2.

[0040] A first limit hole 122 is provided at the edge of the adjustment plate 12 on the side away from the mounting hole 112. The main scale 21 is slidably connected to the first limit hole 122, and the first limit tightening screw 123 is arranged corresponding to the first limit hole 122. The vernier scale 22 is arranged at one end of the main scale 21 away from the first limit hole 122. By adjusting the length of the main scale 21 extending out of the first limit hole 122, the measuring range of the measuring scale 2 is changed, and the main scale 21 is tightened and fixed by cooperating with the first limit tightening screw 123 to ensure the smoothness of the measuring process after the measuring stroke is adjusted.

[0041] In this embodiment, as Figure 3 shown, the detection rod 3 is arranged in an L shape, including a vertical rod 31 and a horizontal rod 32. The vertical rod 31 is slidably connected to the sleeve 23 and is tightened and fixed by a third limit tightening screw 231. The horizontal rod 32 is arranged parallel to the first adjustment hole 113.

[0042] The vertical rod 31 of the detection rod 3 is connected to the vernier scale 22 of the measuring rod through the sleeve 23, making the measuring tooling easy to assemble and disassemble. The vertical rod 31 and the horizontal rod 32 are respectively arranged parallel to the main scale 21 of the measuring rod and the mounting plate 11. When the horizontal rod 32 is placed on the fixed clamp block, the valve displacement of the regulating valve can be displayed on the main scale 21 in real time and proportionally through the detection rod 3, and can be read through the scale on the main scale 21, facilitating the acquisition of measurement data while ensuring the measurement accuracy.

[0043] Preferably, a measuring claw 33 is provided at one end of the horizontal rod 32 away from the vertical rod 31. The measuring claw 33 is slidably connected to the horizontal rod 32 through a connecting sleeve 34 and is tightened and fixed by a fourth limit tightening screw 341 provided on the connecting sleeve 34. The connecting sleeve 34 is sleeved at the connection between the horizontal rod 32 and the measuring claw 33, and a gasket 342 is arranged inside the connecting sleeve 34 corresponding to the fourth limit tightening screw 341.

[0044] The measuring claw 33 is installed through the connecting sleeve 34 at one end of the horizontal rod 32, and the measuring claw 33 can move along the length direction of the horizontal rod 32, facilitating the adjustment of the length of the detection rod 3 by the measuring tooling according to the measuring space, avoiding interference between the detection rod 3 being too long and the fixed clamp block, or the detection rod 3 being too short to be placed on the fixed clamp block.

[0045] After the installation and adjustment of the measuring jaw 33 are completed, the measuring jaw 33, the connecting sleeve 34 and the horizontal rod 32 are tightly fixed together with the fourth limit tightening screw 341 to ensure the stable structure of the detection rod 3 during the measurement process and guarantee the measurement accuracy. At the same time, the detection rod 3 has a simple structure, is convenient for disassembly and assembly, and does not require complex fixing and calibration steps, making it easy to operate.

[0046] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic control valve accuracy measurement tool, characterized in that: include: A connecting seat (1), a measuring ruler (2) and a detection rod (3), wherein the measuring ruler (2) is vertically arranged on the connecting seat (1) and slidably connected thereto, and the detection rod (3) is slidably connected to the measuring ruler (2); A mounting hole (112) is provided on the connecting base (1), the mounting hole (112) and the measuring ruler (2) are respectively arranged on two sides of the connecting base (1), and a first limiting tightening screw (123) is provided on the connecting base (1) corresponding to the measuring ruler (2); The measuring ruler (2) comprises a main ruler (21) and a vernier ruler (22) arranged thereon, a clamping sleeve (23) is arranged on the vernier ruler (22), the detection rod (3) is slidably connected to the clamping sleeve (23), a second limit-position tightening screw (221) is arranged on the vernier ruler (22) corresponding to the main ruler (21), and a third limit-position tightening screw (231) is arranged on the clamping sleeve (23) corresponding to the detection rod (3).

2. The pneumatic control valve precision measurement tool according to claim 1 is characterized in that: The connecting seat (1) comprises a mounting plate (11) and an adjusting plate (12) slidably connected thereto, and the mounting hole (112) and the measuring ruler (2) are respectively arranged on the mounting plate (11) and the adjusting plate (12); A first adjustment hole (113) is provided on the mounting plate (11) in a direction away from the mounting hole (112), and the adjustment plate (12) is slidably connected to the first adjustment hole (113) via a fixing screw (124) provided thereon.

3. The pneumatic control valve precision measurement tool according to claim 2 is characterized in that: Two first adjustment holes (113) are arranged in parallel.

4. The pneumatic control valve precision measurement tool according to claim 2 or 3, characterized in that: A second adjustment hole (121) is provided on the adjustment plate (12) corresponding to the first adjustment hole (113); the second adjustment hole (121) is arranged parallel to the first adjustment hole (113); and the fixing screw (124) is installed at the second adjustment hole (121).

5. The pneumatic control valve precision measurement tool according to claim 2 is characterized in that: A first limiting hole (122) is provided at an edge of one side of the adjustment plate (12) away from the mounting hole (112); the main scale (21) is slidably connected to the first limiting hole (122); and the first limiting tightening screw (123) is correspondingly arranged to the first limiting hole (122).

6. The pneumatic control valve precision measurement tool according to claim 2 is characterized in that: The detection rod (3) is arranged in an L shape, comprising a vertical rod (31) and a horizontal rod (32); the vertical rod (31) is slidably connected to the clamping sleeve (23) and is tightened and fixed by the third limit tightening screw (231); and the horizontal rod (32) is arranged parallel to the first adjustment hole (113).

7. The pneumatic control valve precision measurement tool according to claim 6 is characterized in that: A measuring claw (33) is provided at one end of the horizontal rod (32) away from the vertical rod (31); the measuring claw (33) is slidably connected to the horizontal rod (32) via a connecting sleeve (34) and is tightened and fixed by a fourth limiting tightening screw (341) provided on the connecting sleeve (34).

8. The pneumatic control valve precision measurement tool according to claim 7 is characterized in that: The connecting sleeve (34) is sleeved at the connection between the horizontal rod (32) and the measuring claw (33), and a gasket (342) is provided on the inner side of the connecting sleeve (34) corresponding to the fourth position limiting and tightening screw (341).

9. The pneumatic control valve precision measurement tool according to claim 2, characterized in that: A through hole (111) is provided on the mounting plate (11) corresponding to the mounting position of the regulating valve, and a plurality of mounting holes (112) are provided along the circumference of the through hole (111).

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