Ship lock water delivery valve stroke detection device based on double-magnetic static magnetic railing ruler

Abstract

A ship lock water delivery valve stroke detection device based on a double-magnetostatic magnetic railing ruler comprises a sleeve, the sleeve is installed on a cylinder body of a water delivery valve oil cylinder through a hoop, one end of a measuring rod is inserted into the sleeve, and the other end of the measuring rod is hinged to a piston rod of the water delivery valve oil cylinder; a plurality of sets of proximity switches are installed outside the sleeve in the length direction and used for detecting the position of a ship lock water conveying valve. The sleeve is provided with a static magnetic railing ruler, and the static magnetic railing ruler is used for detecting the stroke of the ship lock water delivery valve. The ship lock water delivery valve stroke detection device based on the double-magnetic static magnetic railing ruler not only can improve the measurement precision, but also is convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stroke detection device, especially a ship lock water delivery valve stroke detection device based on double magnetic static magnetic grating scale mode. BACKGROUND

[0002] The ship lock water delivery valve is one of the most important equipment for controlling the operation of the ship lock, and is frequently opened and closed under the non-constant flow all the year round, and its working environment is poor. In order to ensure the safe and stable operation of the valve, it is extremely important to monitor the operation state of the valve. The stroke detection is one of the key contents of the valve operation state monitoring, mainly including the stroke and position detection information such as the valve opening degree, opening end and closing end, and the stroke detection information is also important control information of the ship lock industrial control system. In the daily maintenance or planned maintenance of the ship lock, the valve stroke detection device is an important equipment for debugging the opening and closing end positions after the valve maintenance, and the stability, reliability, science and efficiency of the device directly affect the maintenance efficiency and safety. The valve stroke detection device currently adopted is a chain transmission type stroke detection device, and the valve chain transmission type stroke detection device has been applied in the ship lock for many years, and has played an extremely key role and made an important contribution in ensuring the safe and efficient operation of the ship lock. However, with the rapid development of the Yangtze River shipping, the ship lock is in a "high load" operation state all the year round, the valve operation frequency increases dramatically, the chain transmission type stroke detection device has the risk of jamming in the operation and maintenance process, and the bearing has no lubrication function, so there are problems such as inconvenient device maintenance and difficult in-situ reinstallation in the maintenance process. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of ship lock water delivery valve stroke detection device based on double magnetic static magnetic grating scale mode, by hoop installation in the cylinder body and lower lifting head of oil cylinder, make the device not with hydraulic oil direct contact, when oil cylinder telescopic movement, lifting head drives stainless steel magnetic grating source measurement rod 1:1 movement, static magnetic grating scale senses direct linear displacement signal, precision is higher. When needing maintenance, it can be directly removed without affecting the use of oil cylinder, and maintenance is simple and convenient.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] A ship lock water delivery valve stroke detection device based on double magnetic static magnetic grating scale mode, comprising a sleeve, the sleeve is installed on the cylinder body of the water delivery valve oil cylinder by a hoop, one end of the measuring rod is inserted into the sleeve, and the other end is hinged to the piston rod of the water delivery valve oil cylinder;A plurality of proximity switches are installed along the length direction outside the sleeve, and the proximity switches are used to detect the position of the ship lock water delivery valve;A static magnetic grating scale is installed on the sleeve, and the static magnetic grating scale is used to detect the stroke of the ship lock water delivery valve.

[0006] The magneto-static grating ruler comprises a magnetic grating, a magnetic head and a detection circuit, wherein the magnetic grating is installed on a sleeve, and the magnetic head is embedded in a measuring rod.

[0007] The magneto-static grating ruler is two groups.

[0008] The proximity switch is three groups, which are an open end switch, a close end switch and a maintenance position switch.

[0009] The open end switch and the maintenance position switch are both slidingly arranged on a proximity switch mounting sliding groove and are adjusted and locked up and down through butterfly nuts.

[0010] The close end switch is slidingly arranged on the proximity switch mounting sliding groove and is connected with a full close position proximity switch adjusting screw rod at the upper end, the full close position proximity switch adjusting screw rod is free to pass through an ear plate fixed outside the sleeve and is tightly pressed through a pin; the full close position proximity switch adjusting screw rod is threadedly connected with a fine adjustment nut at the upper end of the ear plate.

[0011] The utility model provides a kind of ship lock water delivery valve stroke detection device based on double magnetic magneto-static grating, with following technical effects:

[0012] 1), since magneto-static grating and measuring rod can be detachably installed outside water delivery valve oil cylinder, they can be directly removed without affecting the use of oil cylinder, and maintenance is simple and convenient.

[0013] 2), by simultaneously setting magneto-static grating and proximity switch, the detection device has ship lock valve opening, open end, close end and other stroke and position detection functions, and can monitor the opening and position information of ship lock valve in real time, when valve opening is inconsistent with actual stroke and position, alarm of control room can alarm in real time, and alarm reason is synchronously displayed, so as to improve the precision of ship lock valve position state sensing, and eliminate the risk of chain transmission structure blocking.

[0014] 3), by adopting two groups of magneto-static grating, one measuring rod is equipped with two rulers, double detection is carried out, and detection precision is improved. DETAILED DESCRIPTION

[0015] The utility model will be further described below in combination with drawings and examples:

[0016] Figure 1 It is the installation structure schematic diagram of the utility model.

[0017] Figure 2 It is Figure 1 It is the structure schematic diagram of upper part.

[0018] Figure 3 It is Figure 1 It is the enlarged schematic diagram of A in the middle.

[0019] Figure 4 It isFigure 1 Enlarged schematic view at B.

[0020] Figure 5 It is the left partial schematic view of the utility model.

[0021] Figure 6 It is the front view of the utility model.

[0022] Figure 7 It is the left view of the utility model.

[0023] In the figure: magnetostrictive grating ruler 1, full-closing position proximity switch adjusting screw rod 2, proximity switch 3a, 3b, 3c, sleeve 4, measuring rod 5, hoop 6, connecting part 6.1, pin 7, knuckle bearing 8, mounting bracket 9, proximity switch mounting sliding groove 10, water delivery valve oil cylinder 11, cylinder body 11.1, piston rod 11.2, ear plate 2.1, fine adjustment nut 2.2, pin 2.3. DETAILED DESCRIPTION

[0024] As Figures 1-3 shown, a kind of shiplock water delivery valve stroke detection device based on double magnetic magnetostrictive grating ruler, including sleeve 4, knuckle bearing 8 is welded in the upper and lower of sleeve 4, knuckle bearing 8 is detachably connected with the connecting part 6.1 of the side of hoop 6 by pin 7.The upper and lower hoop 6 is then correspondingly held tightly on the cylinder body 11.1 of water delivery valve oil cylinder 11.The sleeve 4 is internally sleeved with measuring rod 5, knuckle bearing 8 is welded in the lower end of measuring rod 5, knuckle bearing 8 is detachably connected with mounting bracket 9 by pin 7, and mounting bracket 9 is welded on the lower hanger head of water delivery valve oil cylinder. Thus measuring rod 5 can follow the piston rod 11.2 of water delivery valve oil cylinder and move up and down.

[0025] Proximity switch sensing block is installed in the measuring rod 5, and proximity switch sensing block moves up and down with the measuring rod 5 relative to sleeve 4.When proximity switch sensing block on measuring rod 5 moves to open-end position, close-end position and maintenance position, proximity switch 3 will open-end position signal, close-end position signal and maintenance position signal to PLC, and PLC directly controls the stop operation of shiplock valve.

[0026] The model of proximity switch 3 is SC-ED / EF magnetic switch, and proximity switch 3 mainly includes valve open-end switch, close-end switch and maintenance position switch, and open-end switch, close-end switch and maintenance position switch are respectively indicated as 3a, 3b and 3c in the figure.

[0027] The first group of proximity switches 3 (two open switches 3a) are arranged in two groups corresponding to the left and right on the two sides of the upper part of the sleeve 4. Each proximity switch 3 is installed on the proximity switch mounting slot 10, which is fixed on the two sides of the outer sleeve 4 in two groups. Each proximity switch mounting slot 10 has a lengthwise waist hole. The proximity switch 3 is slidingly arranged in the proximity switch mounting slot 10 and points to the sleeve 4. The proximity switch 3 is fixed on one side of the screw rod, which extends out of the waist hole. The proximity switch 3 is fixed by rotating the butterfly nut on the screw rod. When adjustment is needed, loosen the butterfly nut, slide the proximity switch 3 up and down to the specified position, and then tighten the butterfly nut again.

[0028] The second group of proximity switches 3 (two closed switches 3b) are arranged in two groups corresponding to the left and right on the two sides of the lower part of the sleeve 4. Each proximity switch 3 is also installed on the corresponding proximity switch mounting slot 10. Unlike the above structure, the proximity switch 3 is fixed on the full-closed proximity switch adjusting screw 2 through the mounting plate. Each full-closed proximity switch adjusting screw 2 freely passes through the ear plate 2.1 fixed on the outside of the sleeve 4, and is screwed on one side into the pin 2.3. The full-closed proximity switch adjusting screw 2 is threadedly connected with the fine adjustment nut 2.2. A scale is vertically arranged on the sleeve 4 to facilitate observation when adjusting the full-closed proximity switch adjusting screw 2 up and down.

[0029] Because the ship lock water valve needs to be precisely adjusted to close to the position to avoid water leakage or damage to the valve, the closed switch 3b needs to be precisely adjusted to ensure that the valve is closed to the position. When operating, loosen the pin 2.3, rotate the fine adjustment nut, then adjust the full-closed proximity switch adjusting screw 2 up and down, and then tighten the pin 2.3 to fix the full-closed proximity switch adjusting screw 2. In this way, the proximity switch 3 can be finely adjusted.

[0030] The third group of proximity switches 3 (one maintenance switch 3c) is installed in the same way as the first group of proximity switches 3, and the installation position is located between the first group of proximity switches 3 and the second group of proximity switches 3.

[0031] The magnetostrictive scale 1 is composed of a magnetic grid, a magnetic head, and a detection circuit. The magnetic grid is installed on the sleeve 4, and the magnetic head is embedded in the measuring rod 5 according to a special coding sequence. The magnetic grid and the magnetic head are used to measure the cylinder stroke. When the magnetic head and the magnetic grid move relative to each other, the magnetic head reads the magnetic signal on the magnetic grid. Through the measurement device, the measured position or displacement is converted into an electrical signal output to the PLC, and the valve opening value is obtained.

[0032] Preferably, the magnetostrictive scale 1 is two groups, 1 measuring rod is equipped with 2 scales, and double detection units improve the detection accuracy.

[0033] Working principle and process:

[0034] 1), when the ship lock water valve cylinder extends, the installation bracket 9 drives the measuring rod 5 to act with the piston rod of the water valve cylinder downward, the magnetostrictive scale 1 measures the displacement of the water valve cylinder, and the displacement information is transmitted to the PLC, so as to obtain the opening value of the water valve; when the water valve cylinder reaches the closing terminal position, the proximity switch 3b sends a signal, and the water valve closing terminal is in place.

[0035] 2), when the ship lock water valve cylinder retracts, the installation bracket 9 drives the measuring rod 5 to act with the piston rod of the water valve cylinder upward, the magnetostrictive scale 1 measures the displacement of the water valve cylinder, and the displacement information is transmitted to the PLC, so as to obtain the opening value of the water valve; when the water valve cylinder reaches the opening terminal position, the proximity switch 3a sends a signal, and the water valve opening terminal is in place.

Claims

1. A stroke detection device for a ship lock water delivery valve based on a double magnetic static magnetic grid scale, characterized by: The utility model provides a kind of water gate position detection device, including sleeve (4), sleeve (4) is installed on the cylinder body (11.1) of water gate oil cylinder (11) by hoop (6), measuring rod (5) one end is inserted into sleeve (4), and the other end is articulated with the piston rod (11.2) of water gate oil cylinder (11);The sleeve (4) is installed with multiple groups of proximity switch (3) along length direction, and proximity switch (3) is used to detect the position of shiplock water gate;Static magnetic grating ruler (1) is installed on the sleeve (4), and static magnetic grating ruler (1) is used to detect the stroke of shiplock water gate.

2. The stroke detection device for ship lock water delivery valve based on double magnetic static magnetic grid scale according to claim 1, characterized in that: The static magnetic grating ruler (1) includes a magnetic grid, a magnetic head, and a detection circuit, wherein the magnetic grid is installed on the sleeve (4), and the magnetic head is embedded in the measuring rod (5).

3. The stroke detection device for ship lock water delivery valve based on double magnetic static magnetic grid scale according to claim 2, characterized in that: The static magnetic grating ruler (1) is two groups.

4. The stroke detection device for ship lock water delivery valve based on double magnetic static magnetic grid scale according to claim 1, characterized in that: The proximity switch (3) is three groups, which are an open-end switch, a close-end switch, and a maintenance position switch.

5. The stroke detection device for ship lock water delivery valve based on double magnetic static magnetic grid scale according to claim 4, characterized in that: The open-end switch and the maintenance position switch are both slidingly arranged on the proximity switch mounting sliding groove (10) and are adjusted and locked up and down by butterfly nuts.

6. The stroke detection device for ship lock water delivery valve based on double magnetic static magnetic grid scale according to claim 4, characterized in that: The close-end switch is slidingly arranged on the proximity switch mounting sliding groove (10) and is connected with a full-close position proximity switch adjusting screw (2) at the upper end, the full-close position proximity switch adjusting screw (2) freely penetrates through an ear plate (2.1) fixed outside the sleeve (4) and is tightly pressed by a pin (2.3); the full-close position proximity switch adjusting screw (2) is threadedly connected with a fine adjustment nut (2.2) at the upper end of the ear plate (2.1).

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