An online recovery device for a rising stem valve switch and a recovery method thereof

Abstract

An on-line recovery device for a rising-stem valve switch, comprising a globe valve and a broken valve stem, wherein a damaged valve stem sleeve connected to the broken valve stem is provided on the globe valve; a new valve stem sleeve is connected to the broken part of the broken valve stem, an upper fixing member is sleeved above the new valve stem sleeve, a lower fixing member is sleeved below the damaged valve stem sleeve, the upper fixing member is connected to the lower fixing member, and the damaged valve stem sleeve and the new valve stem sleeve are located between the upper fixing member and the lower fixing member; compared with the prior art, by connecting the new valve stem sleeve to the broken valve stem and by providing the upper fixing member and the lower fixing member, it is ensured that the horizontal height of the new valve stem sleeve is always at the same height, and by driving the rotation of the new valve stem sleeve by the reinstalled handwheel, under the action of the thread, the rotation of the broken valve stem is driven while the height of the new valve stem sleeve remains unchanged, thereby realizing the control of the broken valve stem by the handwheel.

Description

Technical Field

[0001] The present invention relates to the technical field of rising-stem valves, and particularly relates to an on-line restoration device for opening and closing a rising-stem valve and a restoration method thereof. Background Art

[0002] The opening and closing member of a rising-stem valve is a gate plate, and the moving direction of the gate plate is perpendicular to the fluid direction. A rising-stem valve can only be fully opened and fully closed, and cannot be adjusted or throttled. When the rising-stem valve is closed, the sealing surface can be sealed only by the medium pressure, that is, only by the medium pressure to press the sealing surface of the gate plate against the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most rising-stem valves adopt forced sealing, that is, when the valve is closed, an external force is required to forcibly press the gate plate against the valve seat to ensure the sealing performance of the sealing surface.

[0003] Among all the equipment in a nuclear power plant, the number of valve equipment is large, and the number of globe valves accounts for the largest proportion. During the long-term operation of nuclear power, because the valve stem screw sleeve of the valve is made of brass and has a soft texture, it is easy to be damaged during the long-term opening and closing process. The structure of the rising-stem valve determines that the replacement of the copper valve stem screw sleeve requires isolating the valve body and disassembling the valve body before replacement.

[0004] However, in system equipment such as nuclear power plants that need to operate 24 hours a day, certain systems cannot isolate the valve or there are certain safety risks in isolating the valve. If the valve cannot be repaired in time, the system equipment will stop operating or the unit will stop due to this. At this time, a solution that can restore the opening and closing function of the globe valve online without isolating the valve will become the key to solving such problems.

[0005] Chinese Patent No. CN213206615U discloses a flange-type rising-stem gate valve that is easy to disassemble, including a first gate valve body. A first flange ring is welded to the front end of the first gate valve body. A valve cavity sealing plate is welded to the rear end of the first gate valve body. A transparent window is installed at the upper end of the front surface of the valve cavity sealing plate. A second gate valve body is installed on the rear surface of the first gate valve body. A valve cavity is welded to the front end of the second gate valve body. A second flange ring is welded to the rear end of the second gate valve body. An oil tank is installed on the upper surface of the second gate valve body.

[0006] Although the above-mentioned disclosed rising-stem gate valve has a split structure, in actual use, when the valve stem breaks and the copper valve stem sleeve breaks, the valve cannot be repaired when the valve is in a closed state, and the unit needs to be shut down before the valve can be replaced, thus affecting the efficiency of the unit. At the same time, there are certain safety hazards in nuclear power equipment. Summary of the Invention

[0007] The present invention aims to overcome the defects in the above-mentioned prior art, and provides an online restoration device and a restoration method for the open-stem valve switch, which have a simple structure, are safe and reliable, and can be repaired in time.

[0008] To achieve the above-mentioned invention purpose, the present invention adopts the following technical solutions: An online restoration device for an open-stem valve switch includes a globe valve and a broken valve stem, and a damaged valve stem bushing connected to the broken valve stem is provided on the globe valve; A new valve stem bushing is connected to the broken part of the broken valve stem. An upper fixing member is sleeved above the new valve stem bushing, and a lower fixing member is sleeved below the damaged valve stem bushing. The upper fixing member is connected to the lower fixing member, and the damaged valve stem bushing and the new valve stem bushing are located between the upper fixing member and the lower fixing member; The lower fixing member is a semi-circular structure arranged oppositely, and the lower fixing members are arranged on opposite sides of the broken valve stem and the oppositely arranged lower fixing members hold the globe valve tightly.

[0009] As a preferred solution of the present invention, a first thrust bearing is sleeved on the new valve stem bushing, and a second thrust bearing is sleeved at the end of the new valve stem bushing.

[0010] As a preferred solution of the present invention, the upper fixing member is of a hollow structure, and an upper connection hole connected to the lower fixing member is formed on the upper fixing member.

[0011] As a preferred solution of the present invention, a positioning groove is formed on the inner arm of the upper fixing member, and the positioning groove presses on the original machining reference surface of the globe valve.

[0012] As a preferred solution of the present invention, a lower connection hole connected to the upper fixing member is formed on the lower fixing member, and a bolt is provided between the upper connection hole and the lower connection hole.

[0013] As a preferred solution of the present invention, a stepped arm groove and a copper ring groove are formed in the middle of the lower fixing member. Both the arm groove and the copper ring groove are of arc mechanisms, and the size of the arm groove is larger than the size of the copper ring groove.

[0014] As a preferred solution of the present invention, the arm groove holds the globe valve tightly.

[0015] As a preferred solution of the present invention, the copper ring groove is sleeved on the bottom of the damaged valve stem bushing.

[0016] A restoration method for an online restoration device for an open-stem valve switch includes a restoration device, and the method includes the following steps:

[0017] Step A: Remove the handwheel bolt and the handwheel of the on-site faulty valve, and screw out the broken section of the broken valve stem;

[0018] Step B: Sleeve a first thrust bearing on the new valve stem bushing, and screw the new valve stem bushing into the broken valve stem connected to the globe valve;

[0019] Step C: Sleeve a second thrust bearing at the end of the new valve stem bushing;

[0020] Step D: Sleeve the upper fixing part on the new valve stem bushing, so that the positioning groove of the upper fixing part presses on the original machining reference surface of the globe valve;

[0021] Step E: Install the lower fixing part at the bottom of the damaged valve stem bushing, and lock the upper fixing part and the lower fixing part;

[0022] Step F: Reinstall the handwheel and the handwheel bolt to complete the installation.

[0023] As a preferred solution of the present invention, in Step E, the arm groove of the lower fixing part holds the globe valve, and the copper ring groove of the lower fixing part restricts the lower half part of the damaged valve stem bushing that cannot be taken out after fracture.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. By connecting the new valve stem bushing to the broken valve stem, and by setting the upper fixing part and the lower fixing part, it is ensured that the horizontal height of the new valve stem bushing is always at the same height. By driving the rotation of the new valve stem bushing with the reinstalled handwheel, under the action of the thread, the rotation of the broken valve stem is driven while the height of the new valve stem bushing remains unchanged, so as to realize the control of the handwheel over the broken valve stem;

[0026] 2. Under the action of the new valve stem bushing, the upper fixing part and the lower fixing part, the extension and control of the broken valve stem can be realized without rotating the broken valve stem and the damaged valve stem bushing, and the existence of the damaged valve stem bushing does not affect the subsequent control and use. Description of the Drawings

[0027] Figure 1 is the front view of the present invention;

[0028] Figure 2 is the structural schematic diagram of the new valve stem bushing;

[0029] Figure 3 is the structural schematic diagram of the upper fixing part;

[0030] Figure 4 is the structural schematic diagram of the lower fixing part;

[0031] Figure 5 is the structural schematic diagram of the damaged outside screw and yoke valve;

[0032] Figure 6 is the structural schematic diagram of the damaged valve stem bushing;

[0033] Reference numerals: globe valve 1, upper fixing member 2, positioning groove 21, lower fixing member 3, arm groove 31, copper ring groove 32, handwheel 4, handwheel bolt 41, new valve stem sleeve 5, first thrust bearing 51, second thrust bearing 52, damaged valve stem sleeve 6, broken valve stem 7. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] As Figures 1-6 shown, an on-line recovery device for a rising stem valve switch includes a globe valve 1 and a broken valve stem 7. A damaged valve stem sleeve 6 connected to the broken valve stem 7 is provided on the globe valve 1. A new valve stem sleeve 5 is connected to the broken part of the broken valve stem 7. An upper fixing member 2 is sleeved above the new valve stem sleeve 5, and a lower fixing member 3 is sleeved below the damaged valve stem sleeve 6. The upper fixing member 2 is connected to the lower fixing member 3. The damaged valve stem sleeve 6 and the new valve stem sleeve 5 are located between the upper fixing member 2 and the lower fixing member 3. The lower fixing member 3 is a semi-circular structure arranged oppositely. The lower fixing member 3 is arranged on opposite sides of the broken valve stem 7, and the oppositely arranged lower fixing members 3 hold the globe valve 1 tightly.

[0036] The damaged valve stem sleeve 6 is made of brass. Due to the brass material, it is relatively soft and is prone to damage during long-term opening and closing processes. The damage at the damaged valve stem sleeve 6 causes the fracture of the valve stem. Therefore, the broken part of the broken valve stem 7 corresponds to the damaged part of the damaged valve stem sleeve 6, and the damaged part of the damaged valve stem sleeve 6 is usually the bent part of the damaged valve stem sleeve 6. Therefore, when the damaged valve stem sleeve 6 is damaged, the damaged valve stem sleeve 6 will break into two sections, and the two sections of the broken damaged valve stem sleeve 6 are respectively located at both ends of the broken valve stem 7.

[0037] At the same time, since the damaged valve stem sleeve 6 is threadedly connected to the broken valve stem 7, when it is necessary to screw out the damaged valve stem sleeve 6 from the broken valve stem 7, the broken valve stem 7 connected to the valve will rotate synchronously with the rotation of the damaged valve stem sleeve 6, resulting in the loosening of the valve. Therefore, during the actual use of this solution, the damaged valve stem sleeve 6 on the broken valve stem 7 connected to the valve is always in a relatively static state, so that the valve is always in a relatively static closed state.

[0038] The connected upper fixing member 2 and lower fixing member 3 wrap the damaged valve stem bushing 6 and the new valve stem bushing 5 simultaneously. Since the damaged valve stem bushing 6 and the new valve stem bushing 5 are connected to the same broken valve stem 7, under the action of the same thread section, the opposing damaged valve stem bushing 6 and new valve stem bushing 5 are fixedly connected. Thus, under the action of the fixed connection between the upper fixing member 2 and the lower fixing member 3, relative stability among the damaged valve stem bushing 6, the new valve stem bushing 5, the upper fixing member 2, and the lower fixing member 3 is achieved.

[0039] A first thrust bearing 51 is sleeved on the new valve stem bushing 5, and a second thrust bearing 52 is sleeved at the end of the new valve stem bushing 5. A thrust groove facilitating the sleeving of the first thrust bearing 51 is formed on the new valve stem bushing 5. The first thrust bearing 51 and the second thrust bearing 52 are used to bear axial loads, enabling the new valve stem bushing 5 to have better stability during the rotation with the broken valve stem 7, laying a good foundation for subsequent opening and closing of the broken valve stem 7.

[0040] The upper fixing member 2 has a hollow structure, and an upper connection hole connected to the lower fixing member 3 is formed on the upper fixing member 2. The middle part of the upper fixing member 2 is for passing through the new valve stem bushing 5. A handwheel thread and a handwheel card slot adapted to the handwheel 4 are also formed on the new valve stem bushing 5.

[0041] A positioning groove 21 is formed on the inner arm of the upper fixing member 2. The positioning groove 21 is pressed on the original machining reference surface of the globe valve 1 to ensure the perpendicularity of the entire damaged valve stem bushing 6, the new valve stem bushing 5, the upper fixing member 2, and the lower fixing member 3, that is, to ensure the parallelism between the new valve stem bushing 5 and the broken valve stem 7.

[0042] A lower connection hole connected to the upper fixing member 2 is formed on the lower fixing member 3. Bolts are provided between the upper connection hole and the lower connection hole. Two lower connection holes communicating with the upper fixing member 2 are formed on the lower fixing member 3. Correspondingly, four lower connection holes communicating with the lower fixing member 2 are formed on the upper fixing member 2.

[0043] Under the action of the bolts, the upper fixing member 2 and the lower fixing member 3 are fixedly connected, and the damaged valve stem bushing 6 and the new valve stem bushing 5 are clamped between the upper fixing member 2 and the lower fixing member 3. There is a gap between the oppositely arranged lower fixing members 3, facilitating the clamping of the globe valve 1 by the oppositely arranged lower fixing members 3.

[0044] Under the action of the lower fixing member 3 abutting against the stop valve 1, it is ensured that the lower fixing member 3 remains in a relatively stationary state during the rotation of the broken valve stem 7. Thus, under the action of the lower fixing member 3 abutting against the damaged valve stem sleeve 6 and the damaged valve stem sleeve 6 abutting against the new valve stem sleeve 5, the support for the heights of the damaged valve stem sleeve 6, the new valve stem sleeve 5, the upper fixing member 2 and the lower fixing member 3 is realized. Therefore, during the rotation of the broken valve stem 7, the damaged valve stem sleeve 6, the new valve stem sleeve 5, the upper fixing member 2 and the lower fixing member 3 are always in a relative height position.

[0045] A stepped arm groove 31 and a copper ring groove 32 are formed in the middle of the lower fixing member 3. Both the arm groove 31 and the copper ring groove 32 are arc mechanisms, and the size of the arm groove 31 is larger than that of the copper ring groove 32. The arm groove 31 holds the stop valve 1 tightly, and the copper ring groove 32 is sleeved on the bottom of the damaged valve stem sleeve 6.

[0046] Under the action of the arm groove 31 holding the stop valve 1 tightly, the relative fixation between the arm groove 31 and the stop valve 1 is realized. At the same time, the copper ring groove 32 is used to sleeve the lower half copper ring that cannot be taken out after the damaged valve stem sleeve 6 is broken, so that there is a larger contact area between the lower fixing member 3 and the lower half copper ring of the damaged valve stem sleeve 6 that cannot be taken out after breaking, and at the same time, there is better stability between the lower fixing member 3 and the lower half copper ring of the damaged valve stem sleeve 6 that cannot be taken out after breaking. The lower fixing member 3 supports the height of the damaged valve stem sleeve 6.

[0047] During the actual use process, it includes the following steps:

[0048] Step A: Remove the handwheel bolt 41 and the handwheel 4 of the on-site faulty valve, and screw out the broken section of the broken valve stem 7. At this time, there is still a part of the broken valve stem 7 connected to the stop valve, and a part of the damaged valve stem sleeve 6 is also connected to the broken valve stem 7 connected to the stop valve.

[0049] The break of the broken valve stem 7 corresponds to the break of the damaged valve stem sleeve 6, and the break of the damaged valve stem sleeve 6 is usually the bent part of the damaged valve stem sleeve 6. Therefore, when the damaged valve stem sleeve 6 is damaged, the damaged valve stem sleeve 6 will break into two sections, and the two sections of the broken damaged valve stem sleeve 6 are respectively located at both ends of the broken valve stem 7.

[0050] Step B: Sleeve a first thrust bearing 51 on the new valve stem sleeve 5, and screw the new valve stem sleeve 5 into the broken valve stem 7 connected to the stop valve 1. A thrust groove for sleeving the first thrust bearing 51 is formed on the new valve stem sleeve 5.

[0051] Step C: Sleeve the second thrust bearing 52 at the end of the new valve stem sleeve 5. After screwing the new valve stem sleeve 5 into the broken valve stem 7, sleeve the second thrust bearing 52 on the other end of the new valve stem sleeve 5. Under the action of the first thrust bearing 51 and the second thrust bearing 52, bear the axial load received by the new valve stem sleeve 5.

[0052] Step D: Sleeve the upper fixing part 2 on the new valve stem sleeve 5, press the positioning groove 21 of the upper fixing part 2 on the original machining reference surface of the globe valve 1. The new valve stem sleeve 5 is arranged through the upper fixing part 2. A handwheel 4 and a handwheel bolt 41 are arranged on the new valve stem sleeve 5. By rotating the new valve stem sleeve 5, drive the broken valve stem 7 connected to the globe valve 1. The connection between the new valve stem sleeve 5 and the broken valve stem 7 is equivalent to a lead screw-slider structure. When the height of the new valve stem sleeve 5 is limited, rotate the new valve stem sleeve 5 to realize the rotation of the broken valve stem 7.

[0053] Internal threads adapted to the broken valve stem 7 are formed on the inner wall of the new valve stem sleeve 5. The new valve stem sleeve 5 is threadedly connected to the broken valve stem 7, and the new valve stem sleeve 5 is connected to the handwheel 4 as an extension section of the broken valve stem 7.

[0054] Step E: Install the lower fixing part 3 at the bottom of the damaged valve stem sleeve 6, lock the upper fixing part 2 and the lower fixing part 3. The arm groove 31 of the lower fixing part 3 holds the globe valve 1, and the copper ring groove 32 of the lower fixing part 3 restricts the lower half of the damaged valve stem sleeve 6 that cannot be taken out after breaking.

[0055] While the lower fixing part 3 is used to hold the globe valve 1 tightly, it supports the height of the upper fixing part 2 and the new valve stem sleeve 5.

[0056] Step F: Reinstall the handwheel 4 and the handwheel bolt 41 to complete the installation. Under the action of rotating the handwheel 4, drive the rotation of the broken valve stem 7 connected to the globe valve 1, so as to realize the control of the globe valve 1.

[0057] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0058] Although the following terms are used more frequently in this text: globe valve 1, upper fixing part 2, positioning groove 21, lower fixing part 3, arm groove 31, copper ring groove 32, handwheel 4, handwheel bolt 41, new valve stem sleeve 5, first thrust bearing 51, second thrust bearing 52, damaged valve stem sleeve 6, broken valve stem 7, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any kind of additional limitation is contrary to the spirit of the present invention.

Claims

1. An on-line recovery device for a rising-stem valve switch, comprising a globe valve (1) and a broken valve stem (7), wherein a damaged valve stem sleeve (6) connected to the broken valve stem (7) is provided on the globe valve (1); Characterized in that, A new valve stem sleeve (5) is connected to the fracture of the broken valve stem (7), an upper fixing member (2) is sleeved above the new valve stem sleeve (5), a lower fixing member (3) is sleeved below the damaged valve stem sleeve (6), the upper fixing member (2) is connected to the lower fixing member (3), and the damaged valve stem sleeve (6) and the new valve stem sleeve (5) are located between the upper fixing member (2) and the lower fixing member (3); the lower fixing member (3) is a semi-circular structure arranged oppositely, the lower fixing members (3) are arranged on opposite sides of the broken valve stem (7), and the oppositely arranged lower fixing members (3) hold the globe valve (1) tightly.

2. The on-line recovery device for a rising-stem valve switch according to claim 1, Characterized in that, A first thrust bearing (51) is sleeved on the new valve stem sleeve (5), and a second thrust bearing (52) is sleeved at the end of the new valve stem sleeve (5).

3. The on-line recovery device for a rising-stem valve switch according to claim 1, Characterized in that, The upper fixing member (2) is of a hollow structure, and an upper connection hole connected to the lower fixing member (3) is formed on the upper fixing member (2).

4. The on-line recovery device for a rising-stem valve switch according to claim 3, Characterized in that, A positioning groove (21) is formed on the inner arm of the upper fixing member (2), and the positioning groove (21) presses on the original machining reference surface of the globe valve (1).

5. The on-line recovery device for a rising-stem valve switch according to claim 1, Characterized in that, A lower connection hole connected to the upper fixing member (2) is formed on the lower fixing member (3), and a bolt is provided between the upper connection hole and the lower connection hole.

6. The on-line recovery device for a rising-stem valve switch according to claim 5, Characterized in that, A stepped arm groove (31) and a copper ring groove (32) are formed in the middle of the lower fixing member (3), both the arm groove (31) and the copper ring groove (32) are arc mechanisms, and the size of the arm groove (31) is larger than the size of the copper ring groove (32).

7. The on-line recovery device for a rising-stem valve switch according to claim 6, Characterized in that, The arm groove (31) holds the globe valve (1) tightly.

8. The on-line recovery device for a rising-stem valve switch according to claim 6, Characterized in that, The copper ring groove (32) is sleeved at the bottom of the damaged valve stem sleeve (6).

9. A recovery method for an on-line recovery device for a rising-stem valve switch, comprising the on-line recovery device for a rising-stem valve switch according to any one of claims 1-8, Characterized in that, Comprising the following steps: Step A: Remove the handwheel bolt (41) and the handwheel (4) of the on-site faulty valve, and screw out the fracture section of the broken valve stem (7); Step B: Sleeve the first thrust bearing (51) on the new valve stem bushing (5), and screw the new valve stem bushing (5) into the broken valve stem (7) connected to the globe valve (1). Step C: Sleeve the second thrust bearing (52) at the end of the new valve stem bushing (5). Step D: Sleeve the upper fixing part (2) on the new valve stem bushing (5), and press the positioning groove (21) of the upper fixing part (2) against the original machining reference surface of the globe valve (1). Step E: Install the lower fixing part (3) at the bottom of the damaged valve stem bushing (6), and lock the upper fixing part (2) and the lower fixing part (3). Step F: Reinstall the handwheel (4) and the handwheel bolt (41) to complete the installation.

10. The restoration method of an on-line restoration device for a rising-stem valve switch according to claim 9, wherein, in the step E, the arm groove (31) of the lower fixing part (3) holds the globe valve (1), and the copper ring groove (32) of the lower fixing part (3) restricts the lower half part of the damaged valve stem bushing (6) that cannot be taken out after fracture.

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