A pilot valve online calibration instrument

Abstract

The present invention discloses an online pilot valve calibrator, including a calibrator bottom box, a connecting rod and an adjusting spring. The upper rear portion of the calibrator bottom box is connected to a box cover by a hinge, and a fixing plate is fixedly installed on the front side of the box cover. The connecting rod is welded to the front side of the fixing plate, and a supporting plate is installed on the front end of the connecting rod. The lower side of the supporting plate is connected to a mounting plate, and an adjusting ring is arranged on the inner side of the mounting plate, and an extension rod is welded to the outer side of the adjusting ring. In this novel online pilot valve calibrator, the pilot valve can be placed on the supporting plate, and the position of the adjustable locking structure composed of the locking frame and the connecting spring can be adjusted to control the movement of the limit plate, adjust the position of the limit plate, quickly fix the pilot valve, and use the adjustable locking structure to lock the limit plate, thereby firmly locking the pilot valve and ensuring the stability of the pilot valve calibration process. This design can be adapted to online calibration of pilot safety valves of various nominal sizes.

Description

Technical Field

[0001] The invention relates to the technical field of novel online pilot valve calibrators, in particular to an online pilot valve calibrator. Background Art

[0002] Pilot-operated safety valves are automatic valves, mainly used in boilers, pressure vessels and pipelines. They control the pressure not to exceed the specified value and play an important protective role in personal safety and equipment operation. In order to ensure the safe use of pilot-operated safety valves and to ensure the smooth use of pilot-operated safety valves, it is necessary to perform online calibration of pilot-operated safety valves. The existing online calibration business for safety valves has been widely praised by the industry since its launch in recent years. However, the online calibration equipment currently used in the market is mostly used on spring-type safety valves, while online calibration equipment for pilot-operated safety valves is relatively rare.

[0003] Pilot-operated safety valves are often encountered during daily calibration. Due to the lack of online calibration equipment, they have to be disassembled for offline calibration. Offline calibration of pilot-operated safety valves is risky and wastes funds. It is not convenient to calibrate the pilot-operated safety valve, and the stability of the pilot-operated safety valve during the calibration process cannot be guaranteed.

[0004] Therefore, we propose an online pilot valve calibrator to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide an online pilot valve calibrator to solve the problem raised by the above background technology that it is inconvenient to calibrate the pilot safety valve in the current market and the stability of the pilot safety valve during the calibration process cannot be guaranteed.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an online pilot valve calibrator, comprising a calibrator bottom box, a connecting rod and an adjusting spring, wherein a box cover is connected to the upper rear portion of the calibrator bottom box through a hinge, and a fixing plate is fixedly installed on the front side of the box cover, the connecting rod is welded to the front side of the fixing plate, and a supporting plate is installed on the front end of the connecting rod, a mounting plate is connected to the lower side of the supporting plate, and an adjusting ring is arranged on the inner side of the mounting plate, an extension rod is welded to the outer side of the adjusting ring, and an adjusting block is installed on the inner side of the adjusting ring, and the adjusting block is A moving rod is fitted on the outside and passes through the inner side of the mounting plate. Support rods are fixedly installed on the left and right ends above the fixed plate, and a locking groove is provided on the outside of the support rod. The upper end of the support rod passes through the interior of the limit plate, and the left and right ends of the limit plate are connected to locking frames through connecting springs. The adjusting spring is fixedly installed on the left and right ends of the rear side of the calibrator bottom box, and the end of the adjusting spring is connected to the adjusting plate. A card block is welded on the inner side of the adjusting plate, and the card block is located on the inner side of the card slot. The card slot is opened on the left and right sides of the box cover.

[0007] Preferably, a vent valve and a calibration switch are respectively installed on the left and right sides of the inner front of the calibrator bottom box, and an output interface, an output meter, a bottle pressure meter, a pressure regulating valve and an input interface are installed in sequence from left to right in the middle of the inner side of the calibrator bottom box, and standard meters are installed on the left and right sides of the inner rear of the calibrator bottom box. At the same time, the output interface, the output meter, the vent valve, the bottle pressure meter, the calibration switch, the pressure regulating valve, the input interface and the standard meter are interconnected by connecting pipes, and the connecting pipes are fixedly installed on the inner side of the calibrator bottom box.

[0008] Preferably, the longest horizontal distance between the inner side of the box cover and the support plate is smaller than the depth of the inner groove of the bottom box of the calibrator, and the depth of the groove of the box cover is the same as the width of the fixing plate.

[0009] Preferably, the support plates are symmetrically arranged with respect to the longitudinal center line of the fixing plate, and the vertical center line of the horizontal line connecting two adjacent support plates coincides with the vertical center line of the mounting plate.

[0010] Preferably, the adjustment ring and the mounting plate form a rotating mechanism, and the top section of the mounting plate is a circular ring structure, and adjustment blocks with arc-shaped top sections are distributed at equal angles on the inner side of the adjustment ring, and the contact points between the adjustment blocks and the moving rod are smooth.

[0011] Preferably, the moving rod includes a locking plate and a compression spring, and a compression spring is installed on the outside of the moving rod, and the outer end of the moving rod is connected to the locking plate. At the same time, the moving rod forms an elastic structure with the mounting plate through the compression spring, and the main cross-section of the moving rod is a "cross" structure.

[0012] Preferably, the top section of the locking plate is an arc-shaped structure, and the shortest distance between two oppositely arranged locking plates is equal to the shortest distance between two oppositely arranged supporting plates.

[0013] Preferably, the main section of the locking frame is an "L"-shaped structure, and the locking frame forms an elastic structure by connecting the spring and the limit plate, and the main section of the limit plate is an inverted "convex" structure, and the limit plate and the support rod are slidably connected.

[0014] Preferably, the side view of the adjustment plate is an "L"-shaped structure, and the adjustment plate forms an elastic structure with the calibrator bottom box through an adjustment spring.

[0015] Compared with the prior art, the invention has the following beneficial effects: the new pilot valve online calibration instrument can

[0016] (1) The output interface, output meter, vent valve, bottle pressure gauge, calibration switch, pressure regulating valve, input interface and standard meter are all connected to each other through connecting pipes. The online calibration device composed of the output meter, pressure regulating valve, bottle pressure gauge, vent valve, calibration switch, connecting pipes, output interface, input interface and standard meter can be used to quickly calibrate the pilot valve. The online calibration device is distributed in the box, with a rigorous structure and easy to carry;

[0017] (2) The pilot valve can be placed on the support plate, and the position of the adjustable locking structure composed of the locking frame and the connecting spring can be adjusted to control the movement of the limit plate, adjust the position of the limit plate, quickly fix the pilot valve, and use the adjustable locking structure to lock the limit plate, thereby firmly locking the pilot valve and ensuring the stability of the pilot valve calibration process. This design can be adapted to the online calibration of pilot safety valves of various nominal sizes;

[0018] (3) The calibrator is connected to the pilot valve through a pipeline, and the pipeline passes through the mounting plate, driving the adjusting ring to rotate and move the adjusting block, thereby adjusting the fixed structure composed of the moving rod, the compression spring and the locking plate, and quickly locking the position of the pipeline. Only two bolts are needed to fix the position of the extension rod. Compared with the existing method of locking in multiple directions using multiple bolts, the operation is more convenient, and it is easier for the staff to apply force, and the wear caused by the continuous disassembly and installation of the pipeline end is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top-sectional structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of the box cover of the present invention;

[0021] Figure 3 This is a schematic diagram of the main cross-sectional structure of the limiting plate of the present invention;

[0022] Figure 4 It is a schematic diagram of the top view of the limiting plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the top-sectional structure of the mounting plate of the present invention;

[0024] Figure 6 It is a schematic diagram of the side structure of the adjustment plate of the present invention;

[0025] Figure 7 It is a schematic diagram of the top-sectional structure of the bottom box of the calibration instrument of the present invention.

[0026] In the figure: 1. Calibrator base box; 2. Box cover; 3. Fixed plate; 4. Support plate; 5. Mounting plate; 6. Adjustment ring; 7. Adjustment block; 8. Extension rod; 9. Moving rod; 901. Locking plate; 902. Compression spring; 10. Support rod; 11. Locking groove; 12. Locking frame; 13. Connecting spring; 14. Limiting plate; 15. Connecting rod; 16. Slot; 17. Adjustment spring; 18. Adjustment plate; 19. Block; 20. Output meter; 21. Pressure regulating valve; 22. Bottle pressure gauge; 23. Vent valve; 24. Calibration switch; 25. Connecting pipeline; 26. Output interface; 27. Input interface; 28. Standard meter. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-7 The present invention provides a technical solution: an online pilot valve calibrator, comprising a calibrator bottom box 1, a box cover 2, a fixing plate 3, a support plate 4, a mounting plate 5, an adjusting ring 6, an adjusting block 7, an extension rod 8, a moving rod 9, a locking plate 901, a compression spring 902, a support rod 10, a locking groove 11, a locking frame 12, a connecting spring 13, a limit plate 14, a connecting rod 15, a card slot 16, an adjusting spring 17, an adjusting plate 18, a card block 19, an output meter 20, a pressure regulating valve 21, a bottle pressure gauge 22, a vent valve 23, a calibration switch 24, a connecting pipeline 25, an output interface 26, an input interface 27 and a standard meter 28, the calibrator bottom box 1 is connected to the box cover 2 at the upper rear through a hinge, and the front side of the box cover 2 is fixedly installed with the fixing plate 3, the connecting rod 15 is welded and connected to the front side of the fixing plate 3, and the front end of the connecting rod 15 is installed with the supporting plate 4 , a mounting plate 5 is connected to the lower side of the support plate 4, and an adjusting ring 6 is provided on the inner side of the mounting plate 5, an extension rod 8 is welded and connected to the outer side of the adjusting ring 6, and an adjusting block 7 is installed on the inner side of the adjusting ring 6, a moving rod 9 is fitted on the outer side of the adjusting block 7, and the moving rod 9 passes through the inner side of the mounting plate 5, and support rods 10 are fixedly installed on the left and right ends above the fixed plate 3, and a locking groove 11 is provided on the outer side of the support rod 10, the upper end of the support rod 10 passes through the interior of the limit plate 14, and the left and right ends of the limit plate 14 are connected to the locking frame 12 through the connecting spring 13, the adjusting spring 17 is fixedly installed on the left and right ends of the rear side of the calibrator bottom box 1, and the end of the adjusting spring 17 is connected to the adjusting plate 18, and a card block 19 is welded and connected to the inner side of the adjusting plate 18, and the card block 19 is located on the inner side of the card slot 16, and the card slot 16 is provided on the left and right sides of the box cover 2.

[0029] In this example, a vent valve 23 and a calibration switch 24 are installed on the left and right sides of the front inner side of the calibrator bottom box 1, and an output interface 26, an output gauge 20, a bottle pressure gauge 22, a pressure regulating valve 21 and an input interface 27 are installed in sequence from left to right in the middle position of the inner side of the calibrator bottom box 1, and a standard gauge 28 is installed on the left and right sides of the inner side of the rear side of the calibrator bottom box 1. At the same time, the output interface 26, the output gauge 20, the vent valve 23, the bottle pressure gauge 22, the calibration switch 24, the pressure regulating valve 21, the input interface 27 and the standard gauge 28 are interconnected by a connecting pipe 25, and the connecting pipe 25 is fixedly installed on the inner side of the calibrator bottom box 1. The online calibration device composed of this design can conveniently calibrate the pilot valve, and the overall occupied area is small, which can be conveniently carried later;

[0030] The longest horizontal distance between the inner side of the box cover 2 and the support plate 4 is less than the internal groove depth of the calibrator bottom box 1, and the groove depth of the box cover 2 is the same as the width of the fixing plate 3. This design ensures that when the box cover 2 and the calibrator bottom box 1 are closed, the support plate 4 and other structures will not be stuck with the calibrator bottom box 1;

[0031] The support plates 4 are symmetrically arranged about the longitudinal center line of the fixing plate 3, and the vertical center line of the horizontal line between two adjacent support plates 4 coincides with the vertical center line of the mounting plate 5. This design ensures that the pipeline can smoothly pass through the mounting plate 5 and the support plate 4 in sequence, which is convenient for the distribution and fixation of the pilot valve;

[0032] The adjusting ring 6 and the mounting plate 5 form a rotating mechanism, and the top section of the mounting plate 5 is a circular ring structure, and the inner side of the adjusting ring 6 is provided with adjusting blocks 7 with an arc-shaped top section at equal angles, and the contact between the adjusting blocks 7 and the moving rod 9 is smooth. This design can ensure the smooth rotation of the adjusting ring 6, synchronously drive the adjusting blocks 7 in different directions to move, smoothly adjust the position of the moving rod 9, and reduce the friction between the adjusting blocks 7 and the moving rod 9;

[0033] The moving rod 9 includes a locking plate 901 and a compression spring 902, and the compression spring 902 is installed on the outer side of the moving rod 9, and the outer end of the moving rod 9 is connected to the locking plate 901. At the same time, the moving rod 9 forms an elastic structure with the mounting plate 5 through the compression spring 902. The main cross-section of the moving rod 9 is a "cross" structure. This design can ensure the flexible movement of the moving rod 9. The moving rod 9 can move and reset by itself, which is convenient for subsequent unlocking.

[0034] The top section of the locking plate 901 is an arc-shaped structure, and the shortest distance between the two oppositely arranged locking plates 901 is equal to the shortest distance between the two oppositely arranged support plates 4. This design can reserve space for pipeline distribution, which is convenient for arranging pipelines.

[0035] The main section of the locking frame 12 is an "L"-shaped structure, and the locking frame 12 forms an elastic structure by connecting the spring 13 and the limit plate 14, and the main section of the limit plate 14 is an inverted "convex" structure, and the limit plate 14 is slidably connected to the support rod 10. This design can ensure the synchronous movement of the locking frame 12 and the limit plate 14, and the locking frame 12 is used to lock the position of the limit plate 14;

[0036] The side view of the adjustment plate 18 is an "L"-shaped structure, and the adjustment plate 18 forms an elastic structure with the calibrator bottom box 1 through the adjustment spring 17. This design can flexibly adjust the position of the adjustment plate 18, and utilize the self-moving reset force of the adjustment plate 18 to control the block 19 to limit the position of the box cover 2.

[0037] Working principle: When using this new pilot valve online calibrator, first, the user Figure 1 The entire device shown is carried to the working area, the box cover 2 is opened, and the box cover 2 is rotated 90° on the upper back of the calibrator bottom box 1 through the hinge, and the adjustment plate 18 is toggled at the same time to control the position of the adjustment plate 18 and the block 19 to ensure that the box cover 2 rotates smoothly. After the box cover 2 rotates 90°, the toggle of the adjustment plate 18 is released, and the adjustment spring 17 drives the adjustment plate 18 to reset and move, and the adjustment plate 18 controls the block 19 to reset and move, and the block 19 is stuck in the slot 16 to lock the position of the box cover 2 to ensure that the box cover 2 and the calibrator bottom box 1 are vertically distributed. The pilot valve is calibrated using the online calibration device composed of the output meter 20, the pressure regulating valve 21, the bottle pressure meter 22, the vent valve 23, the calibration switch 24, the connecting pipeline 25, the output interface 26, the input interface 27 and the standard meter 28. The pilot valve is placed on the connecting rod 15, and it is ensured that the connection port connected to the online calibration device is located in the gap between the two support plates 4. Figure 2-3 As shown, the locking frame 12 is pulled left and right respectively, and the locking frame 12 pulls the connecting spring 13 to move the locking frame 12 out of the locking groove 11. At this time, the limit of the position of the limit plate 14 is released, and the limit plate 14 is pressed synchronously to control the limit plate 14 to slide on the outside of the support rod 10, and the limit plate 14 is moved down. The pilot valve is gradually fixed with the limit plate 14. After the pilot valve is firmly locked, the pulling of the locking frame 12 can be released, and the connecting spring 13 drives the locking frame 12 to reset, and the locking frame 12 is stuck into the locking groove 11 at the corresponding position, and the limit plate 14 is locked to prevent the limit plate 14 from moving by itself, and the pilot valve is firmly locked. After the pilot valve is locked, the calibration instrument can be connected to the pilot valve through a pipeline, and the hard pipeline of the calibration instrument passes through the mounting plate 5 to fit with the valve port of the pilot valve, and the hard pipeline is pushed so that the hard pipeline and the pilot valve are tightly fitted. At the same time, the extension rod 8 is toggled, combined with Figure 5As shown, the extension rod 8 drives the adjustment ring 6 to rotate clockwise, and the adjustment ring 6 drives the adjustment block 7 installed inside to rotate, and the adjustment block 7 pushes the moving rod 9 to move, and the moving rod 9 squeezes the compression spring 902, and simultaneously pushes the locking plate 901 to move in the direction of the pipeline, squeezes the pipeline, locks the position of the pipeline, stops toggling the extension rod 8, and uses the bolt to lock the extension rod 8 to complete the connection between the calibration instrument and the pilot valve, and controls the calibration instrument to perform online calibration of the pilot valve, and the calibration gas is pressurized in the air chamber and the upper part of the pilot valve. When the pilot valve reaches the set point, the pilot valve opens. Because the pilot valve is equivalent to a spring-loaded safety valve, the set pressure of the pilot valve can be judged by sound, and the relevant settings can be adjusted to complete the calibration of the pilot valve;

[0038] According to the above steps, the bolts fixing the extension rod 8 are unscrewed, and the extension rod 8 is moved in the opposite direction to drive the adjustment ring 6 to move as shown in FIG. Figure 5 The direction shown is counterclockwise, thereby controlling the adjustment block 7 to gradually move to disengage from the moving rod 9, and the compression spring 902 can drive the moving rod 9 to reset, thereby controlling the locking plate 901 to move away from the pipeline, releasing the fixation of the pipeline, and releasing the connection between the pipeline and the pilot valve, and then pulling the locking frame 12 to release the lock on the position of the limit plate 14, pushing up the limit plate 14, increasing the distance between the limit plate 14 and the support plate 4, releasing the fixation of the pilot valve, and then the pilot valve can be taken out. The above is the working process of the entire device. The content not described in detail in this manual belongs to the existing technology known to professional and technical personnel in this field.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An online pilot valve calibrator, comprising a calibrator bottom box (1), a connecting rod (15) and an adjusting spring (17), characterized in that: The upper rear part of the bottom box (1) of the calibration instrument is connected to a box cover (2) through a hinge, and a fixing plate (3) is fixedly installed on the front side of the box cover (2), the connecting rod (15) is welded to the front side of the fixing plate (3), and a support plate (4) is installed at the front end of the connecting rod (15), the lower side of the support plate (4) is connected to a mounting plate (5), and an adjusting ring (6) is arranged on the inner side of the mounting plate (5), an extension rod (8) is welded to the outer side of the adjusting ring (6), and an adjusting block (7) is installed on the inner side of the adjusting ring (6), a moving rod (9) is fitted on the outer side of the adjusting block (7), and the moving rod (9) passes through the inner side of the mounting plate (5), and support rods (10) are fixedly installed on the left and right ends above the fixing plate (3), and the outer side of the support rod (10) is A locking groove (11) is provided on the side, the upper end of the support rod (10) passes through the interior of the limit plate (14), and the left and right ends of the limit plate (14) are connected to the locking frame (12) through the connecting spring (13), the adjusting spring (17) is fixedly installed on the left and right ends of the rear side of the calibration instrument bottom box (1), and the end of the adjusting spring (17) is connected to the adjusting plate (18), the inner side of the adjusting plate (18) is welded with a clamping block (19), and the clamping block (19) is located on the inner side of the clamping groove (16), the clamping groove (16) is provided on the left and right sides of the box cover (2), the horizontal longest distance between the inner side of the box cover (2) and the support plate (4) is less than the inner groove depth of the calibration instrument bottom box (1), and the groove depth of the box cover (2) is the same as the width of the fixing plate (3); The vent valve (23) and the calibration switch (24) are respectively installed on the left and right sides of the inner front of the calibrator bottom box (1), and the output interface (26), the output meter (20), the bottle pressure meter (22), the pressure regulating valve (21) and the input interface (27) are installed in sequence from left to right at the middle position of the inner side of the calibrator bottom box (1), and the standard meter (28) is installed on the left and right sides of the inner rear of the calibrator bottom box (1), and the output interface (26), the output meter (20), the vent valve (23), the bottle pressure meter (22), the calibration switch (24), the pressure regulating valve (21), the input interface (27) and the standard meter (28) are all connected to each other through a connecting pipeline (25), and the connecting pipeline (25) is fixedly installed on the inner side of the calibrator bottom box (1).

2. The pilot valve online calibrator according to claim 1, characterized in that: The support plates (4) are symmetrically arranged with respect to the longitudinal center line of the fixing plate (3), and the vertical center line of the horizontal line connecting two adjacent support plates (4) coincides with the vertical center line of the mounting plate (5).

3. The pilot valve online calibrator according to claim 1, characterized in that: The adjusting ring (6) and the mounting plate (5) form a rotating mechanism, and the top section of the mounting plate (5) is a circular ring structure, and the inner side of the adjusting ring (6) is provided with adjusting blocks (7) with arc-shaped top section structures at equal angles, and the contact points between the adjusting blocks (7) and the moving rod (9) are smooth.

4. The pilot valve online calibrator according to claim 1, characterized in that: The moving rod (9) comprises a locking plate (901) and a compression spring (902), and the compression spring (902) is installed on the outer side of the moving rod (9), and the outer end of the moving rod (9) is connected to the locking plate (901), and the moving rod (9) forms an elastic structure with the mounting plate (5) through the compression spring (902), and the main cross-section of the moving rod (9) is a "cross"-shaped structure.

5. The pilot valve online calibrator according to claim 4 is characterized in that: The top section of the locking plate (901) is an arc-shaped structure, and the shortest distance between two oppositely arranged locking plates (901) is equal to the shortest distance between two oppositely arranged supporting plates (4).

6. The pilot valve online calibrator according to claim 1, characterized in that: The main cross-section of the locking frame (12) is an "L"-shaped structure, and the locking frame (12) forms an elastic structure by connecting the spring (13) and the limiting plate (14), and the main cross-section of the limiting plate (14) is an inverted "convex" structure, and the limiting plate (14) and the support rod (10) are slidably connected.

7. The pilot valve online calibrator according to claim 1, characterized in that: The side view of the adjustment plate (18) is an "L"-shaped structure, and the adjustment plate (18) forms an elastic structure with the calibration instrument bottom box (1) through the adjustment spring (17).

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