RTD temperature element dismounting device

Abstract

The utility model provides an RTD temperature element dismounting device, and relates to the technical field of nuclear power station equipment maintenance. Comprising a first support, a second support, a first connecting block, a second connecting block, a first screw, a second screw, a first lifter, a second lifter, a lifting rod, a first driven gear, a second driven gear, a first transmission gear, a second transmission gear, a transmission rod and a hand wheel. The dismounting device is simple in structure and convenient to operate, a large number of tools are not needed for assistance, the working difficulty and time consumption are reduced, a worker can dismount most RTD temperature elements which are stuck in the sleeve due to high-temperature adhesion through the dismounting device, and therefore the dismounting efficiency of the RTD temperature elements is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nuclear power plant equipment maintenance technical field, specifically related to a RTD temperature element dismantling device. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute the prior art.

[0003] The AP1000 nuclear power plant nuclear island primary loop pipeline is used for transmitting the primary loop medium, so that the heat of the core is transmitted to the secondary loop through the steam generator. The primary loop pipeline is provided with an RTD temperature element for real-time measurement of the primary loop medium temperature, and the reactor protection system provides protection function for the unit. The RTD sleeve is welded on the RCS system main pipeline to form a primary loop pressure boundary, and the RTD temperature element is installed in the RTD sleeve and does not directly contact the primary loop medium. During the on-site RTD temperature element fault handling, the RTD temperature element and the sleeve are sometimes stuck and cannot be pulled out manually. In the prior art, the method for removing the RTD temperature element is to use a rope or a belt to be tied on the upper part of the RTD, and the RTD is pulled out by manpower. However, the applicant finds that the method has the following technical problems:

[0004] (1) A large number of tools need to be prepared to deal with various problems that may occur during the work.

[0005] (2) When using manpower to pull, it is not easy to control the force, and the RTD temperature element is easy to be damaged.

[0006] (3) If the RTD is installed in a narrow space, it is not easy to remove by the rope pulling method.

[0007] (4) It is difficult to remove, and it takes a long time. INVENTION CONTENTS

[0008] In order to solve the above problems, the application provides a RTD temperature element dismantling device, which comprises a first support, a second support, a first connecting block, a second connecting block, a first screw rod, a second screw rod, a first lifter, a second lifter, a lifting rod, a first driven gear, a second driven gear, a first transmission gear, a second transmission gear, a transmission rod and a hand wheel;

[0009] The first support is connected with the first lifter through the first connecting block, and the second support is connected with the second lifter through the second connecting block;

[0010] The first screw rod passes through the threaded holes on both sides of the first lifter, the threaded hole on the side close to the first driven gear of the first screw rod is fixedly connected with the first screw rod, and the other side of the first screw rod is a free end;

[0011] The second screw rod passes through the threaded holes on both sides of the second lifter, the threaded hole close to the side of the second driven gear is fixedly connected with the second screw rod, and the other side of the second screw rod is a free end;

[0012] The lifting rod is connected with the first lifter and the second lifter;

[0013] The first driven gear and the second driven gear are fixedly installed on the transmission rod;

[0014] The first transmission gear is connected with the first driven gear, and the second transmission gear is connected with the second driven gear;

[0015] The hand wheel is installed at the end of the transmission rod, and the first transmission gear and the second transmission gear are installed on the transmission rod.

[0016] Further, the clamp is detachable and fixed in the middle of the lifting rod.

[0017] Further, the clamp can be adjusted in opening degree, and the maximum clamping diameter is 20 mm.

[0018] Further, the base of the first support and the second support is an arc surface or a plane.

[0019] Further, the first connecting block and the second connecting block are rotatable structures.

[0020] Further, the pitch value of the first screw rod and the second screw rod ranges from 1.5 mm to 2.0 mm.

[0021] Further, the four edges of the first lifter and the second lifter are connected with movable joints.

[0022] Further, the first transmission gear, the second transmission gear, the first driven gear and the second driven gear are all 45° conical gears.

[0023] Compared with the prior art, the RTD temperature element removing device has the following beneficial effects:

[0024] (1) The structure is simple, the operation is convenient, a large number of tools are not needed, the working difficulty and time consumption are reduced, most of the RTD temperature elements stuck in the sleeve due to high temperature adhesion can be removed by the removing device, and therefore the removing efficiency of the RTD temperature elements is improved.

[0025] (2) The main body material of the device is selected from light high-strength metal materials, the device has small volume, is convenient to carry and has long service life.

[0026] (3) The hand wheel drives the transmission rod, and then drives the first lifter and the second lifter to synchronously lift, the RTD temperature element is smoothly pulled out, and the risk of damaging the RTD temperature element is avoided.

[0027] (4) The clamp can be adjusted to adapt to RTD temperature elements of different diameters, and the clamp is detachable, so that operation in a narrow space is facilitated.

[0028] (5) The bases of the first support and the second support are arc surfaces or planes, and the pitches of the first screw rod and the second screw rod can be selected according to the mounting condition of the RTD temperature element, so that the applicability and stability of the device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of the present disclosure, are used to provide further understanding of the present disclosure, and the illustrative embodiments of the present disclosure and their description serve the purpose of explaining the present disclosure. The present disclosure should not be limited by the accompanying drawings.

[0030] Figure 1 The utility model discloses a RTD temperature element removal device.

[0031] Wherein, 1-1, first support, 1-2, second support, 2-1, first connecting block, 2-2, second connecting block, 3-1, first screw rod, 3-2, second screw rod, 4-1, first lifter, 4-2, second lifter, 5, lifting rod, 6, clamp, 7-1, first driven gear, 7-2, second driven gear, 8-1, first transmission gear, 8-2, second transmission gear, 9, transmission rod, 10, hand wheel. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0033] Embodiment one

[0034] Please refer to Figure 1 The utility model provides a RTD temperature element removal device, including first support (1-1), second support (1-2), first connecting block (2-1), second connecting block (2-2), first screw rod (3-1), second screw rod (3-2), first lifter (4-1), second lifter (4-2), lifting rod (5), first driven gear (7-1), second driven gear (7-2), first transmission gear (8-1), second transmission gear (8-2), transmission rod (9) and hand wheel (10);

[0035] The first support (1-1) is connected with the first lifter (4-1) through the first connecting block (2-1), and the second support (1-2) is connected with the second lifter (4-2) through the second connecting block (2-2); through the side-by-side design of the first support and the second support instead of the single support design, the RTD temperature element to be removed can be stably fixed, and shaking or displacement during the removal process is avoided, thereby improving the safety and accuracy of the removal operation.

[0036] The first screw rod (3-1) passes through the threaded holes on both sides of the first lifter (4-1), the threaded hole close to the first driven gear (7-1) side of the first screw rod (3-1) is fixedly connected with the first screw rod (3-1), and the other side of the first screw rod (3-1) is a free end;

[0037] The second screw rod (3-2) passes through the threaded holes on both sides of the second lifter (4-2), the threaded hole close to the second driven gear (7-2) side of the second screw rod (3-2) is fixedly connected with the second screw rod (3-2), and the other side of the second screw rod (3-2) is a free end; the introduction of the first screw rod and the second screw rod enables the operator to adjust the relative position between the lifter and the support by rotating the screw rod, thereby realizing accurate control of the RTD temperature element.

[0038] The lifting rod (5) is connected with the first lifter (4-1) and the second lifter (4-2); the first lifter and the second lifter are arranged, so that the operator can conveniently realize the lifting operation of the RTD temperature element by adjusting the height of the lifter. The removal process is simplified, the operation difficulty is reduced, and the work efficiency is improved.

[0039] The first driven gear (7-1) and the second driven gear (7-2) are fixedly installed on the transmission rod (9);

[0040] The first transmission gear (8-1) is connected with the first driven gear (7-1), and the second transmission gear (8-2) is connected with the second driven gear (7-2);

[0041] The hand wheel (10) is installed at the end of the transmission rod (9); the first transmission gear (7-1) and the second transmission gear (7-2) are installed on the transmission rod (9). The first driven gear, the second driven gear, the first transmission gear and the second transmission gear are used in cooperation, so as to realize effective transmission between the transmission rod and the lifter. The operator only needs to rotate the hand wheel, and the lifter can be driven to perform lifting movement through the transmission action of the transmission gear. This design simplifies the operation process, improves the transmission efficiency, and makes the removal operation more smooth and efficient.

[0042] Also included is a clamp (6) which is detachable and fixed in the middle of the lifting rod (5). The clamp (6) can be adjusted in opening, with a maximum clamping diameter of 20mm. By fixing the clamp in the middle of the lifting rod, the clamp can firmly hold the RTD temperature element, preventing it from slipping or being damaged during removal. While ensuring the safety of the work, the accuracy and efficiency of the removal work are improved.

[0043] The base of the first bracket (1-1) and the second bracket (1-2) is arc or plane. Good contact with RTD accessory pipeline or equipment surface can be achieved.

[0044] The first connecting block (2-1) and the second connecting block (2-2) are rotatable structures. The first connecting block and the second connecting block serve as connecting bridges, achieving stable connection between the first bracket and the first lifter, and between the second bracket and the second lifter, ensuring the overall stability of the device, and allowing the first lifter and the second lifter to smoothly perform lifting operations when needed, thereby effectively removing the RTD temperature element. At the same time, the rotatable structure design provides greater flexibility for the device. In actual operation, the first lifter and the second lifter are rotated to adapt to different angles and positions when removing the RTD temperature element, thereby improving the removal efficiency and accuracy.

[0045] The pitch of the first screw (3-1) and the second screw (3-2) is in the range of 1.5mm-2.0mm. The pitch of the screw is adaptively adjusted according to RTD temperature elements of different sizes and specifications, improving the versatility and practicality of the device.

[0046] The 4 edges of the first lifter (4-1) and the second lifter (4-2) are connected by movable joints. The design of movable joints allows the first lifter and the second lifter to more flexibly adapt to different working angles and positions during operation. It ensures that the device can effectively perform RTD temperature element removal operations in complex working environments, such as narrow or irregular spaces. At the same time, the introduction of movable joints enhances the adaptability and durability of the device. In the long-term use process, due to the continuous change of working environment and conditions, the device will be affected by various external forces. Movable joints can absorb and distribute these external forces, reducing the impact and wear on the structure of the lifter itself, thereby prolonging the service life of the device. In addition, movable joints also make it more convenient to maintain and adjust the device. When the lifter needs to be adjusted or replaced, the operator can easily adjust the angle and position of the movable joint to quickly position and fix the lifter. This greatly improves work efficiency and reduces maintenance costs.

[0047] The first transmission gear (8-1), the second transmission gear (8-2), the first driven gear (7-1) and the second driven gear (7-2) are all 45° bevel gears. The adoption of the 45° bevel gears makes the meshing between the gears more compact, thereby improving the stability and reliability of the transmission. In the process of removing the RTD temperature element, the compact meshing can effectively prevent the slipping or misalignment between the gears, thereby ensuring the smooth operation of the transmission system.

[0048] The RTD temperature element removing device is composed of the bases of the first support and the second support, a lifter, a clamp and the like, and the main body of the tool is made of light high-strength metal material. The base is a replaceable component, and has a flat surface or an arc surface, and can be in good contact with the RTD accessory pipeline or the surface of the equipment. The base is designed as a direction-rotatable structure, and is fastened to the device through a locking device after being installed and adjusted in direction. The base is provided with a fastening device (quick-release pin fastening, buckle fastening, etc.), and the dismounting tool can be fixed to the outer surface of the pipeline or the container through the fastening device after the installation position of the dismounting tool is determined on site. The gears are fixed to the transmission rod in the device, and the gears drive the clamp to complete the lifting action through the operation handle. The clamp is designed as an adjustable opening, and the maximum clamping diameter is 20 mm. The clamping part has an anti-slip function (achieved through rough surface treatment, addition of a rubber coating and the like), and has an anti-damage function for the RTD component.

[0049] The working principle of the utility model is as follows:

[0050] In use, the device is installed and fixed on the pipeline of the RTD through the support, and the RTD element straight rod is clamped by the clamp. The handle is shaken, the transmission rod is rotated, the transmission gear is driven to rotate, and the driven gear is driven to rotate with the screw rod. The screw rod is pressed through the threaded hole, the lifter on both sides is extruded, the top of the lifter is moved upward, the lifting rod is moved upward, the clamp installed on the lifting rod clamps the RTD temperature element and moves upward, and the RTD temperature element is removed.

[0051] In the description of the present application, the terms "connection", "installation", "fixation", "arrangement" and the like are understood in a broad sense, for example, "connection" can be fixed connection or indirect connection through intermediate components without affecting the relationship between components and technical effects, or can be integral connection or partial connection, which can be understood according to the specific circumstances by those skilled in the art.

[0052] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for removing RTD temperature elements, characterized in that, It includes a first bracket, a second bracket, a first connecting block, a second connecting block, a first screw, a second screw, a first lifter, a second lifter, a lifting rod, a first driven gear, a second driven gear, a first transmission gear, a second transmission gear, a transmission rod, and a handwheel; The first bracket is connected to the first lifter via the first connecting block, and the second bracket is connected to the second lifter via the second connecting block; The first screw passes through the threaded holes on both sides of the first lifting device. The threaded hole on the side of the first screw near the first driven gear is fixedly connected to the first screw. The other side of the first screw is a free end. The second screw passes through the threaded holes on both sides of the second lifting device. The threaded hole on the side of the second screw near the second driven gear is fixedly connected to the second screw. The other side of the second screw is a free end. The lifting rod is connected to the first lifting device and the second lifting device; The first driven gear and the second driven gear are fixedly mounted on the transmission rod; The first transmission gear is connected to the first driven gear, and the second transmission gear is connected to the second driven gear; The handwheel is mounted on the end of the transmission rod; the transmission rod is equipped with the first transmission gear and the second transmission gear.

2. The RTD temperature element removal device as described in claim 1, characterized in that, It also includes a clamp, which is detachable and fixed in the middle of the lifting rod.

3. The RTD temperature element removal device as described in claim 2, characterized in that, The clamp has an adjustable opening and a maximum clamping diameter of 20mm.

4. The RTD temperature element removal device as described in claim 1, characterized in that, The bases of the first bracket and the second bracket are curved or flat.

5. The RTD temperature element removal device as described in claim 1, characterized in that, The first connecting block and the second connecting block are rotatable structures.

6. The RTD temperature element removal device as described in claim 1, characterized in that, The pitch of the first screw and the second screw ranges from 1.5mm to 2.0mm.

7. The RTD temperature element removal device as described in claim 1, characterized in that, The four sides of the first and second lifting devices are connected by movable joints.

8. The RTD temperature element removal device as described in claim 1, characterized in that, The first transmission gear, the second transmission gear, the first driven gear, and the second driven gear are all 45° bevel gears.

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