Multifunctional valve cage extractor for regulating valve

Abstract

The utility model relates to the technical field of power plant regulating valve cage taking-out, in particular to a multifunctional regulating valve cage taking-out device which comprises a hanging bracket, a lifting ring bolt and a plurality of adjusting bolts, the hanging bracket is shaped like a Chinese character'mi ', the hanging bracket is provided with six supporting legs, and a bearing hole is formed in the center of the hanging bracket; and threads are arranged on the inner surfaces of the bearing holes and used for being connected with eyebolts, the interior of each supporting leg is tapped to form an internal threaded hole, and an adjusting bolt is inserted into the internal threaded hole of each supporting leg. The lifting device solves the technical problem that an existing adjusting valve cage is not provided with a lifting hole, the lifting ring bolt is arranged in the center of the lifting frame, the adjusting bolts can be installed on the six supporting legs of the lifting frame, and the technical effect that the adjusting valve cage is safely and efficiently taken out can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of extracting a valve cage of a power plant regulating valve, and in particular relates to a multifunctional valve cage extractor of a regulating valve. Background Art

[0002] Control valves are widely used in the main and auxiliary systems of the nuclear island, three waste systems, conventional islands and BOP systems of nuclear power plants. Control valves remotely and automatically control process parameters such as flow, pressure, temperature, and liquid level during the process to ensure the normal operation and safe production of the process system. According to incomplete statistics, the number of control valves used in a single unit of Fujian Fuqing Nuclear Power Co., Ltd. has reached more than 10,000, so the role of control valves is crucial. In the preventive and corrective maintenance process of control valves, the maintenance quality will indirectly affect the equipment reliability of the control valves, and the maintenance quality plays a vital role in the nuclear safety of nuclear power plants.

[0003] In order to ensure the equipment reliability of the control valve during normal operation, the control valve needs to be preventively maintained during the unit refueling overhaul. Preventive maintenance includes disassembly inspection of the actuator and valve body, among which the quality of disassembly inspection of the valve body is the top priority. During the disassembly of the control valve, the valve cage needs to be removed to check the valve seat sealing surface and replace the valve seat gasket. However, most of the valve cages at the Fuqing Nuclear Power Plant site do not have lifting holes designed on the top. Due to the heavy weight of the valve cage and the lack of force application points, it is very difficult to remove the valve cage from the valve body. The usual practice is to use a temporary machine-added special lifting device to remove the valve cage. However, during the removal of the valve cage, there are often problems such as the size of the special lifting device not meeting the site requirements, the load-bearing capacity not meeting the requirements, and the inability to adjust the lifting position online. Summary of the invention

[0004] The utility model aims to provide a multifunctional regulating valve cage extractor, which is used to solve the problem in the prior art that the valve cage is difficult to remove because the size of the special lifting equipment does not meet the site requirements, the load-bearing capacity does not meet the requirements and the lifting position cannot be adjusted online.

[0005] The technical solution of this utility model:

[0006] The utility model proposes a multifunctional regulating valve cage extractor, which comprises: a hanger, a lifting eye bolt and a plurality of adjusting bolts. The hanger is in the shape of a "M" character, and is provided with six legs and a bearing hole is provided at the center of the hanger. A thread is provided on the inner surface of the bearing hole for connecting the lifting eye bolt. An internal threaded hole is formed by tapping the inside of each leg, and an adjusting bolt is inserted into the internal threaded hole of each leg.

[0007] In some embodiments, the upper section of the adjusting bolt is a threaded section, the middle section is an external hexagonal rod, and the lower section of the adjusting bolt is a cylindrical rod; the upper threaded section of the adjusting bolt is inserted into the inner threaded hole of the hanger leg.

[0008] In some embodiments, a lifting ear is provided at the upper end of the lifting eye bolt, and a threaded section is provided at the lower end of the lifting eye bolt.

[0009] In some embodiments, the threaded section of the adjusting bolt is used to connect with the hanger leg, and the inner diameter of the threaded hole in the hanger leg matches the outer diameter of the threaded section of the adjusting bolt.

[0010] In some embodiments, the outer diameter of the threaded section at the lower end of the eye bolt matches the inner diameter of the hanger bearing hole.

[0011] In some embodiments, the cylindrical rod at the lower section of the adjusting bolt is inserted into the valve hole of the valve cage, and the depth of the cylindrical rod inserted into the valve hole of the valve cage is adjusted by tightening the outer hexagonal rod at the middle section of the adjusting bolt.

[0012] Beneficial effects of implementing this utility model:

[0013] The utility model proposes a multifunctional regulating valve cage extractor, which has the following advantages:

[0014] (1) The device solves the technical problem that the existing regulating valve cage has no lifting holes. The device can achieve the technical effect of safely and efficiently removing the regulating valve cage by setting a lifting eye bolt at the center of the hanger and installing adjusting bolts on the six legs of the hanger.

[0015] (2) The device has internal threaded holes on its lifting legs and external hexagonal adjusting bolts, which provide a technical means for removing the cages of regulating valves of various types and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a hanger for a multifunctional regulating valve cage extractor proposed in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of a lifting bolt of a multifunctional regulating valve cage extractor proposed in an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the adjusting bolt of the multifunctional regulating valve cage extractor proposed in an embodiment of the utility model;

[0019] Figure numerals: 1, hanger; 2, eye bolt; 3, adjusting bolt. DETAILED DESCRIPTION

[0020] like Figures 1 to 3As shown, the utility model proposes a multifunctional regulating valve cage extractor, which includes: a hanger 1, a lifting eye bolt 2 and a plurality of adjusting bolts 3. The hanger 1 is in the shape of a "M" character, and is provided with six legs and a bearing hole is provided at the center of the hanger 1; the inner surface of the bearing hole is provided with a thread for connecting the lifting eye bolt 2, and each leg is tapped to form an internal threaded hole, and an adjusting bolt 3 is inserted into the internal threaded hole of each leg. The device can safely and efficiently remove the regulating valve cage of nuclear power plants and other power plants without lifting holes, and provides a safe and efficient solution for removing the regulating valve cage of nuclear power plants and other power plants without lifting holes.

[0021] In some embodiments, the upper end of the adjusting bolt 3 is a threaded section, the middle section is an external hexagonal rod, and the lower end is a cylindrical rod. The upper threaded section of the adjusting bolt 3 is inserted into the internal threaded hole of the hanger leg 1, and the cylindrical rod is inserted into the valve cage valve hole and the insertion depth is adjusted by the external hexagonal rod. The adjusting bolt 3 is an auxiliary bearing component. Because the internal threaded hole is provided on the lifting leg of the device, and the adjusting bolt 3 is provided with an external hexagon, the technical means of removing the regulating valve cage of various types and sizes is realized.

[0022] In some embodiments, a lifting ear is provided at the top of the lifting eye bolt 2, and a threaded section is provided at the lower end of the lifting eye bolt 2. The lifting ear is used for lifting, and the lifting eye bolt 2 is the main load-bearing component.

[0023] It should be noted that the upper threaded section of the adjusting bolt 3 is used to connect with the leg of the hanger 1, the inner diameter of the internal threaded hole of the leg of the hanger 1 matches the outer diameter of the upper threaded section of the adjusting bolt 3, and the outer diameter of the lower threaded section of the eyebolt 2 matches the inner diameter of the bearing hole of the hanger 1. The thread size of the leg of the hanger 1 and the thread size of the upper threaded section of the adjusting bolt 3 are M12. The thread size of the lower threaded section of the eyebolt 2 and the thread size of the bearing hole of the hanger 1 are M16.

[0024] like Figures 1 to 3 As shown, the operation implementation mode of the utility model is described in detail below:

[0025] Step 1: Thread the six legs on the hanger 1 to the upper section of the adjusting bolt 3 respectively. After installation, the hanger 1 and the adjusting bolt 3 are a whole.

[0026] Step 2: Place the hanger 1 and the adjusting bolt 3 as a whole into the valve cage of the regulating valve, and insert the cylindrical rod of the lower section of the adjusting bolt 3 into the valve hole of the valve cage.

[0027] Step 3: Use a combination wrench to tighten the outer hexagonal rod in the middle section of an adjusting bolt 3 to adjust the depth of the cylindrical rod of the bolt 3 inserted into the valve cage valve hole.

[0028] Step 4: Repeat step 3 to screw the cylindrical rods of the remaining five adjusting bolts 3 into the valve cage holes.

[0029] Step 5: Thread the eyebolt 2 into the bearing hole at the center of the hanger 1.

[0030] Step 6: Use an external lifting device to lift the lug on eyebolt 2 to complete cage removal.

[0031] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A multifunctional regulating valve cage extractor, characterized in that: The extractor includes: a hanger, an eye bolt and a plurality of adjusting bolts. The hanger is in the shape of a "M" character. The hanger is provided with six legs and a bearing hole is provided at the center of the hanger. The inner surface of the bearing hole is provided with a thread for connecting the eye bolt. Each leg is internally tapped to form an internal threaded hole, and an adjusting bolt is inserted into the internal threaded hole of each leg.

2. A multifunctional regulating valve cage extractor according to claim 1, characterized in that: The upper section of the adjusting bolt is a threaded section, the middle section is an external hexagonal rod, and the lower section of the adjusting bolt is a cylindrical rod; the upper threaded section of the adjusting bolt is inserted into the threaded hole in the hanger leg.

3. The multifunctional regulating valve cage extractor according to claim 1, characterized in that: The upper end of the eye bolt is provided with a lifting ear, and the lower end of the eye bolt is provided with a threaded section.

4. The multifunctional regulating valve cage extractor according to claim 2, characterized in that: The adjusting bolt threaded section is used to be connected to the hanger leg, and the inner diameter of the internal threaded hole of the hanger leg matches the outer diameter of the adjusting bolt threaded section.

5. The multifunctional regulating valve cage extractor according to claim 3, characterized in that: The outer diameter of the threaded section at the lower end of the eye bolt matches the inner diameter of the hanger bearing hole.

6. The multifunctional regulating valve cage extractor according to claim 2, characterized in that: The cylindrical rod at the lower section of the adjusting bolt is inserted into the valve hole of the valve cage, and the depth of the cylindrical rod inserted into the valve hole of the valve cage is adjusted by tightening the outer hexagonal rod at the middle section of the adjusting bolt.

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