A valve packing gland bolt failure compression device

Abstract

The present application belongs to the technical field of compression equipment, and particularly relates to a compression device for valve packing gland bolt failure, wherein a sliding groove is symmetrically arranged on a compression plate component, and a protruding component is arranged on the sliding groove; a sliding component is arranged in the sliding groove of the compression plate component, and is in sliding connection with the sliding groove; the two ends of the sliding component respectively pass through the sliding groove, and a hook component is arranged at the bottom of the sliding component; a locking component is arranged on the sliding component, and is in threaded connection with the sliding component; the protruding component on the compression plate component is in abutment with the fracture of the valve bolt, and the end face of the protruding component is in arc structure, so that the centering characteristic is achieved, the stress point is always kept at the bolt installation position, the stress is not uneven in the compression process, and then effective compression force is applied to the bolt fracture; the hook component is additionally arranged, and the sliding component is moved in the sliding groove, so that the device is suitable for irregular and complex installation conditions of the hook installation point, and the overall applicability is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of clamping equipment technology, and in particular relates to a clamping device for valve packing gland bolt failure. Background Technology

[0002] As thermal power units age, valves in critical systems such as turbines and boilers also age. Under complex operating conditions, metal fatigue in valve components significantly reduces the mechanical properties of the materials, seriously threatening the safe operation of the unit. Important systems such as condensate and feedwater systems have numerous valves with low operating frequency; prolonged inactivity can cause packing to stick to the valve stem. When the valve is reopened, leakage is easily caused by packing wear. The usual method for dealing with such leakage is to retighten the packing gland bolts. However, due to the decline in mechanical properties, the packing gland bolts often break during retightening. After bolt breakage, the bolts left on the valve body are difficult to remove and cannot be replaced. This results in uneven packing compression at the valve stem, preventing proper sealing of the valve stem near the bolt breakage point, leading to leakage that cannot be eliminated by conventional measures.

[0003] A valve leak occurred due to a broken valve packing gland bolt, affecting the safe and stable operation of the unit. Furthermore, because valves in such critical systems are difficult to isolate, online disassembly and repair are not possible. The only option is to tighten the packing gland without disassembly, a highly risky operation. Different types of valves have different tightening methods, and the appropriate solution must be selected based on the specific site conditions during tightening, resulting in time-consuming and inefficient maintenance.

[0004] After a bolt breaks and fails, the common methods are: tightening the packing with only the remaining bolts or removing the broken wire with a pneumatic drill. Tightening with the remaining bolts will result in uneven stress on the gland, causing uneven clamping force on the packing gland, which may lead to leakage again near the bolt failure location. Removing and replacing the broken wire with a pneumatic drill is costly, dangerous, and subject to space constraints, making it impossible to implement in confined spaces. Summary of the Invention

[0005] The purpose of this invention is to provide a clamping device for valve packing gland bolt failure, so as to solve the technical problems of uneven clamping force after bolt breakage and the large size of traditional clamping equipment, which is not easy to operate in a confined space.

[0006] To solve the above-mentioned technical problems, the specific technical solution of the present invention is as follows:

[0007] In some embodiments of this application, a tightening device is provided for valve packing gland bolts when they fail, comprising:

[0008] A pressure plate component, wherein the pressure plate component is provided with symmetrically arranged sliding grooves and protruding components thereon;

[0009] A sliding component is provided in the slide groove of the pressure plate component and is slidably connected to the slide groove. Both ends of the sliding component extend through the slide groove and a hook component is provided at the bottom of the sliding component.

[0010] A locking component is provided on the sliding component and is threadedly connected to the sliding component;

[0011] By placing the pressure plate component at the broken point of the valve bolt, aligning the protrusion on the pressure plate component with the broken point, and then contacting the bottom of the valve with the hook component, the protrusion on the bottom of the pressure plate component is tightly fitted to the broken point by rotating the locking component, so that the pressure plate component and the valve are kept in a constant state and pressed together.

[0012] In some embodiments of this application, the pressure plate component is an integral structure, and the end face of the protruding component at its bottom is an arc-shaped structure.

[0013] In some embodiments of this application, the hook component and the sliding component are connected in one of two ways: detachable or integrated.

[0014] The shape of the hook component corresponds to the shape of the protrusion at the bottom of the valve.

[0015] In some embodiments of this application, the pressure plate component and the protruding component have a detachable structure, including:

[0016] The pressure plate component has a longitudinally arranged threaded hole at its center and symmetrically arranged sliding grooves on both sides of the threaded hole.

[0017] The protruding component has an arc-shaped bottom, a fixing component at the top, and a threaded component on its outer surface.

[0018] The protruding component is connected to the threaded hole of the pressure plate component.

[0019] In some embodiments of this application, the pressure plate component and the protruding component have a sliding connection structure, including:

[0020] The pressure plate component has a first through hole arranged longitudinally at its center and symmetrically arranged sliding grooves on both sides of the first through hole.

[0021] The first through hole is provided with symmetrically arranged limiting components;

[0022] A protruding component is provided in the first through hole, and a limiting groove is provided on it in a symmetrical arrangement. A fixing component is provided on the top of the protruding component, and its bottom is an arc-shaped structure.

[0023] The limiting groove is slidably connected to the limiting component in the first through hole;

[0024] A driving component is provided on the pressure plate component, and its telescopic end is connected to the fixed component on the top of the protruding component.

[0025] In some embodiments of this application, the driving component is a combined structure, including:

[0026] The first support component is symmetrically arranged on both sides of the first through hole, its bottom is fixedly connected to the pressure plate component, and its top is fixedly connected to the connecting component.

[0027] A rotating component, which is disposed on a connecting component, with its rotating end passing through the connecting component and protruding out;

[0028] The rotating end of the rotating component is provided with a first slider component;

[0029] The second slider component is disposed on the first support component and is slidably connected to the first support component. It is also provided with a second through hole parallel to the pressure plate component.

[0030] A sliding rod component, which is fixedly connected to a first slider component, with its two ends respectively passing through a second through hole on a second slider component;

[0031] The slide rod component is slidably connected to the second through hole;

[0032] A connecting rod component, one end of which is connected to the bottom of the first slider component, and the other end of which is connected to the fixing component at the top of the protruding component.

[0033] In some embodiments of this application, it further includes: a locking component, wherein the locking component is on the second slider component;

[0034] The locking components include:

[0035] A magnetic attraction component is disposed on the second slider component and is located above the second through hole;

[0036] The second support component is disposed on the second slider component and is located between the second through hole and the magnetic attraction component.

[0037] An arc-shaped rod component, which is hinged to a second support component;

[0038] The arc-shaped rod component is made of metal.

[0039] A rack component, which is symmetrically arranged at both ends of the slide bar component, has a helical tooth structure, and the helical tooth structure on the rack component contacts the bottom of the arc-shaped bar component;

[0040] The rack components at both ends of the slide member have opposite directions of their helical teeth.

[0041] In some embodiments of this application, the slide bar component is a modular structure, including:

[0042] The first straight rod component has one end connected to the first slider component, and the other end passing through the second through hole of the second slider component on one side, and is provided with a first helical tooth component;

[0043] The second straight rod component has one end connected to the first slider component, and the other end passing through the second through hole of the second slider component on the other side. It is provided with a second helical tooth component; the first helical tooth component and the second helical tooth component are in opposite directions.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: the protruding part on the pressure plate component abuts against the broken part of the valve bolt. Since the end face of the protruding part has an arc-shaped structure, it has a centering characteristic, which makes it easy to keep the force point at the bolt installation point at all times, avoiding uneven force during the tightening process, and thus applying an effective tightening force to the broken part of the bolt; by adding a hook component and a sliding component that moves in the groove, it can be adapted to use in complex installation situations with irregular installation hook points, thereby enhancing the overall applicability; and by changing the connection method between the protruding part and the pressure plate component, the tightening force applied by the protruding part to the broken part of the bolt can be adjusted, further improving the tightening effect of the tightening device. Attached Figure Description

[0045] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0046] Figure 1 These are schematic diagrams of the overall structure from different perspectives provided in Embodiment 1 of the present invention;

[0047] Figure 2 These are schematic diagrams of the overall structure from different perspectives provided in Embodiment 1 of the present invention;

[0048] Figure 3 This is a schematic diagram of the overall top view structure provided in Embodiment 1 of the present invention;

[0049] Figure 4 for Figure 3 Internal structure diagram of section AA;

[0050] Figure 5This is a schematic diagram of the overall internal structure provided in Embodiment 2 of the present invention;

[0051] Figure 6 This is a schematic diagram of the overall internal structure provided in Embodiment 3 of the present invention;

[0052] Figure 7 This is a schematic diagram of the overall internal structure provided in Embodiment 4 of the present invention;

[0053] Figure 8 This is a schematic diagram of the overall internal structure provided in Embodiment 5 of the present invention;

[0054] Figure 9 This is a schematic diagram of the internal structure of the second slider component provided in Embodiment 5 of the present invention;

[0055] Figure 10 This is a schematic diagram of the first straight rod component structure provided in Embodiment 5 of the present invention;

[0056] Figure 11 This is a schematic diagram of the second straight rod component provided in Embodiment 5 of the present invention. Detailed Implementation

[0057] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0058] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0059] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0062] Example 1

[0063] See appendix Figure 1-4 As shown, according to the embodiments of this application, it includes:

[0064] The pressure plate component 1 is provided with symmetrically arranged sliding grooves 101 and protruding components 2 thereon;

[0065] The pressure plate component 1 is specifically a straight plate structure with symmetrically arranged waist-shaped holes on it. The bottom of the plate has a protruding component 2 with a hemispherical end face. The diameter of the protruding component 2 should be larger than the diameter of the through hole of the pressure plate bolt to ensure that the spherical surface is on the hole at the bolt breakage point.

[0066] The distance between the farthest and the closest holes of the two oblong holes of the pressure plate component 1 should be greater than and less than the distance between the two fixing points of the hook component 301 during use, respectively, to ensure convenient installation and disassembly and easy adjustment.

[0067] It should be noted that if the broken part of the screw is flush with the upper surface of the valve cover before the tightening operation, the broken part can be ground to create a spherical groove.

[0068] The sliding component 3 is disposed in the slide groove 101 of the pressure plate component 1 and is slidably connected to the slide groove 101. Both ends of the sliding component 3 extend through the slide groove 101 and a hook component 301 is provided at the bottom of the sliding component 3.

[0069] The sliding component 3 is a screw structure, which is located in the oblong hole of the pressure plate component 1. It can rotate and move left, right, up and down in the oblong hole;

[0070] The hook component 301 and the sliding component 3 are connected in one of two ways: detachable or integrated. The shape of the hook component 301 corresponds to the shape of the outer surface of the bottom of the valve, and the specific shape is selected according to actual needs.

[0071] Locking component 4 is provided on sliding component 3. Specifically, locking component 4 consists of a nut and a washer. The nut is threadedly connected to sliding component 3, while the washer is sleeved on sliding component 3 and is located below the nut.

[0072] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0073] By placing the pressure plate component 1 at the broken point of the valve bolt, the end face of the protruding component 2 at the bottom of the pressure plate component 1 contacts the broken point. Since the end face of the protruding component 2 is hemispherical, it automatically aligns with the broken point, ensuring contact. Then, by rotating the locking component 4, the hook component 301 contacts the bottom of the valve, making the protruding component 2 at the bottom of the pressure plate component 1 tightly fit against the broken point and the hook component 301 contacts the bottom of the valve. This maintains a constant state between the pressure plate component 1 and the valve, thus achieving compression. The hemispherical structure of the end face of the protruding component 2 gives it an automatic alignment characteristic, allowing it to accurately apply compression force to the bolt installation position and avoid uneven force on the gland. The use of double sliding components 3 and the hook component 301 at the bottom of the sliding components 3 facilitates installation of the compression device on the irregular outer surface of the valve gland, effectively improving the applicability of the compression device and making it easy to disassemble and adjust.

[0074] Example 2

[0075] See appendix Figure 5 As shown, in some embodiments of this application, the pressure plate component 1 and the protruding component 2 are detachable, including: the pressure plate component 1, which has a longitudinally arranged threaded hole at its center and symmetrically arranged sliding grooves 101 on both sides of the threaded hole;

[0076] Specifically, the pressure plate component 1 is a straight plate structure with symmetrically arranged waist-shaped holes and a through hole with internal threads between the two waist-shaped holes.

[0077] The protruding component 2 has an arc-shaped bottom and a fixing component 201 at the top, and a threaded component on its outer surface; the end face of the bottom of the protruding component 2 has a hemispherical structure; the diameter of the protruding component 2 should be larger than the diameter of the through hole of the pressure plate bolt to ensure that the spherical surface is on the hole; the outer surface of the protruding component 2 has an external thread structure, and the protruding component 2 is connected to the threaded hole of the pressure plate component 1 through the external thread structure.

[0078] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0079] The protruding component 2 is connected to the threaded hole of the pressure plate component 1 by means of threads. Then, the protruding component 2 is aligned and installed with the broken part of the valve bolt according to the installation method of Embodiment 1. After installation, the fixing component 201 is rotated again for fine adjustment, so that the protruding component 2 can further apply the clamping force to the broken part of the bolt and improve the clamping effect. The protruding component 2 is connected to the pressure plate component 1 by means of threads, which not only makes the connection between the protruding component 2 and the pressure plate component 1 more stable, but also makes it easier to apply greater clamping force to the broken part. It can be used in a variety of environments and has stronger applicability.

[0080] Example 3

[0081] See appendix Figure 6 As shown, this embodiment of the application adopts some of the structures described in the above embodiments, wherein the pressure plate component 1 and the protruding component 2 are connected by a sliding connection, including:

[0082] The pressure plate component 1 has a first through hole 102 arranged longitudinally at the center of the pressure plate component 1, and symmetrically arranged sliding grooves 101 on both sides of the first through hole 102.

[0083] The first through hole 102 is provided with symmetrically arranged limiting components 1021 inside;

[0084] The protruding component 2 is disposed in the first through hole 102, and has symmetrically arranged limiting grooves 202 on it. The top of the protruding component 2 is provided with a fixing component 201, and its bottom is an arc-shaped structure.

[0085] The limiting groove 202 is slidably connected to the limiting component 1021 in the first through hole 102;

[0086] The driving component 5 is disposed on the pressure plate component 1, and its telescopic end is connected to the fixing component 201 at the top of the protruding component 2.

[0087] It should be noted that the drive component 5 can be a telescopic cylinder, mechanical lifting device or other device that can raise and lower the protruding component 2;

[0088] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0089] First, the drive component 5 extends downward, causing the protruding component 2 to extend out of the first through hole 102 of the pressure plate component 1, aligning the end face of the protruding component 2 with the broken part of the bolt. Then, the rotating locking component 4 makes the pressure plate component 1 fit against the valve cover, and the hook component 301 contacts the bottom of the valve cover, maintaining a constant state between the pressure plate component 1 and the valve cover component. Then, the drive component 5 moves downward, causing the protruding component 2 to move further longitudinally along the first through hole 102 of the pressure plate component 1, so that the protruding component 2 further applies a clamping force to the broken part. The method of using the drive component 5 to drive the movement of the protruding component 2 reduces the labor intensity of the user and makes it more convenient to use.

[0090] Example 4

[0091] See appendix Figure 7 As shown, this embodiment of the application adopts some of the structures described in the above embodiments, wherein the driving component 5 is a combined structure, including:

[0092] The first support component 501 is symmetrically arranged on both sides of the first through hole 102. Its bottom is fixedly connected to the pressure plate component 1, and its top is fixedly connected to the connecting component 502.

[0093] Furthermore, the first support component 501 is a symmetrically arranged rod or plate structure, and the first support component 501 is arranged at an angle.

[0094] A rotating component 503 is disposed on a connecting component 502, and its rotating end extends through the connecting component 502; a first slider component 504 is provided on the rotating end of the rotating component 503.

[0095] The rotating component 503 is a stepper motor, and its rotating end is a screw structure. A first slider component 504 is provided on it. The first slider component 504 can move up and down as the rotating end of the rotating component 503 rotates.

[0096] The second slider component 505 is disposed on the first support component 501 and is slidably connected to the first support component 501. It is also provided with a second through hole 5051 parallel to the pressure plate component 1.

[0097] A sliding rod component 506 is fixedly connected to a first slider component 504, and its two ends respectively pass through the second through hole 5051 on the second slider component 505.

[0098] The second slider component 505 can slide on the slider component 506;

[0099] Linkage component 507, one end of which is connected to the bottom of the first slider component 504, and the other end of which is connected to the fixing component 201 at the top of the protruding component 2;

[0100] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0101] The rotation of the rotating component 503 causes the first slider component 504 to move longitudinally along the rotating end of the rotating component 503, thereby applying a downward pressure to the protruding component 2, causing the protruding component 2 to further press against the broken bolt. During this process, as the first slider component 504 moves longitudinally, it drives the sliding rod component 506 to move downward, causing the second slider component 505 to move downward along the direction of the first support component 501. The second slider component 505 moves synchronously on the sliding rod component 506. The use of a stepper motor drive not only reduces production costs but also ensures stability during the lifting process, making it more convenient to use.

[0102] Example 5

[0103] See appendix Figure 8-11 As shown, this embodiment of the application adopts some of the structures in the above embodiments, and further includes a locking component 508, which is disposed on the second slider component 505;

[0104] The locking component 508 includes:

[0105] A magnetic component 5081 is disposed on the second slider component 505 and is located above the second through hole 5051; the magnetic component 5081 is a magnet.

[0106] The second support component 5082 is disposed on the second slider component 505 and is located between the second through hole 5051 and the magnetic component 5081.

[0107] The second support component 5082 is a fixed rod, and it is fixedly connected to the second slider component 505;

[0108] Arc-shaped rod component 5083 is hinged to the second support component 5082 and can be longitudinally flipped on the second support component 5082;

[0109] The arc-shaped rod component 5083 is made of metal.

[0110] The rack component 5061 is symmetrically arranged at both ends of the slide bar component 506 and has a helical tooth structure. The helical tooth structure on the rack component 5061 is in contact with the bottom of the arc-shaped bar component 5083.

[0111] The rack components 5061 at both ends of the slide rod component 506 have opposite helical teeth directions;

[0112] It should be further noted that the slide rod component 506 is a modular structure, including:

[0113] The first straight rod component 50601 has one end connected to the first slider component 504, and the other end passes through the second through hole 5051 of the second slider component 505 on one side, and is provided with a first helical tooth component 50611.

[0114] The second straight rod component 50602 has one end connected to the first slider component 504, and the other end passes through the second through hole 5051 of the second slider component 505 on the other side, and is provided with a second helical tooth component 50612.

[0115] The first helical tooth component 50611 is in the opposite direction to the second helical tooth component 50612.

[0116] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0117] By flipping the arc-shaped rod component 5083, its bottom comes into contact with the rack component 5061, thus limiting the rack component 5061. During the downward movement of the sliding rod component 506, the bottom of the arc-shaped rod component 5083 moves on the rack component 5061, causing it to undulate. When the sliding rod component 506 reaches the designated position, the bottom of the arc-shaped rod component 5083 engages with the teeth on the rack component 5061. Due to the helical teeth, the rack component 5061... In this structure, the slide rod component 506 cannot move upward when the arc-shaped rod component 5083 is engaged with the teeth, thus playing a limiting role and preventing the protruding component 2 from moving upward due to external factors, affecting the pressing state. During disassembly, by flipping the arc-shaped rod component 5083, the arc-shaped rod component 5083 comes into contact with the magnetic suction component 5081. At this time, the rack component 5061 is in contact with the limiting relationship and can be restored to its original position for disassembly. By using the locking component 508 to limit the downward movement of the slide rod component 506, the stability of the pressing process is ensured.

[0118] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0119] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tightening device for valve packing gland bolts when they fail, characterized in that, include: A pressure plate component, wherein the pressure plate component is provided with symmetrically arranged sliding grooves and protruding components thereon; A sliding component is provided in the slide groove of the pressure plate component and is slidably connected to the slide groove. Both ends of the sliding component extend through the slide groove and a hook component is provided at the bottom of the sliding component. A locking component is provided on the sliding component and is threadedly connected to the sliding component; By placing the pressure plate component at the broken point of the valve bolt, aligning the protrusion on the pressure plate component with the broken point, and then contacting the bottom of the valve with the hook component, the protrusion on the bottom of the pressure plate component is tightly fitted to the broken point by rotating the locking component, so that the pressure plate component and the valve are kept in a constant state and pressed together. The end face of the protruding part at the bottom of the pressure plate component has an arc-shaped structure; The connection between the hook component and the sliding component can be either detachable or integrated. The shape of the hook component corresponds to the shape of the protrusion at the bottom of the valve.

2. The tightening device for valve packing gland bolt failure according to claim 1, characterized in that, The pressure plate component is an integral structure.

3. The tightening device for valve packing gland bolt failure according to claim 1, characterized in that, The pressure plate component and the protruding component have a detachable structure, including: The pressure plate component has a longitudinally arranged threaded hole at its center and symmetrically arranged sliding grooves on both sides of the threaded hole. The protruding component has an arc-shaped bottom, a fixing component at the top, and a threaded component on its outer surface. The protruding component is connected to the threaded hole of the pressure plate component.

4. The tightening device for valve packing gland bolt failure according to claim 1, characterized in that, The pressure plate component and the protruding component are connected by a sliding connection, including: The pressure plate component has a first through hole arranged longitudinally at its center and symmetrically arranged sliding grooves on both sides of the first through hole. The first through hole is provided with symmetrically arranged limiting components; A protruding component is provided in the first through hole, and a limiting groove is provided on it in a symmetrical arrangement. A fixing component is provided on the top of the protruding component, and its bottom is an arc-shaped structure. The limiting groove is slidably connected to the limiting component in the first through hole; A driving component is provided on the pressure plate component, and its telescopic end is connected to the fixed component on the top of the protruding component.

5. A tightening device for valve packing gland bolt failure according to claim 4, characterized in that, The drive component is a modular structure, including: The first support component is symmetrically arranged on both sides of the first through hole, its bottom is fixedly connected to the pressure plate component, and its top is fixedly connected to the connecting component. A rotating component, which is disposed on a connecting component, with its rotating end passing through the connecting component and protruding out; The rotating end of the rotating component is provided with a first slider component; The second slider component is disposed on the first support component and is slidably connected to the first support component. It is also provided with a second through hole parallel to the pressure plate component. A sliding rod component, which is fixedly connected to a first slider component, with its two ends respectively passing through a second through hole on a second slider component; The slide rod component is slidably connected to the second through hole; A connecting rod component, one end of which is connected to the bottom of the first slider component, and the other end of which is connected to the fixing component at the top of the protruding component.

6. A tightening device for valve packing gland bolt failure according to claim 5, characterized in that, Also includes: The positioning component, on the second slider component of the positioning component; The locking components include: A magnetic attraction component is disposed on the second slider component and is located above the second through hole; The second support component is disposed on the second slider component and is located between the second through hole and the magnetic attraction component. An arc-shaped rod component, which is hinged to a second support component; The arc-shaped rod component is made of metal. A rack component, which is symmetrically arranged at both ends of the slide bar component, has a helical tooth structure, and the helical tooth structure on the rack component contacts the bottom of the arc-shaped bar component; The rack components at both ends of the slide member have opposite directions of their helical teeth.

7. A tightening device for valve packing gland bolt failure according to claim 6, characterized in that, The slide bar component is a modular structure, including: The first straight rod component has one end connected to the first slider component, and the other end passing through the second through hole of the second slider component on one side, and is provided with a first helical tooth component; The second straight rod component has one end connected to the first slider component, and the other end passing through the second through hole of the second slider component on the other side, and is provided with a second helical tooth component. The first helical tooth component is oriented in the opposite direction to the second helical tooth component.

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