Spring load safety unloading tool

Abstract

The application discloses a spring load safety unloading tool, which comprises a connecting rod, the action end of the connecting rod can be locked with the hand wheel rod of the pneumatic two-position valve execution structure, and the connecting rod is fixedly provided with a locking piece; an inner cylinder type hydraulic jack is arranged in series between the action end of the connecting rod and the locking piece to drive the connecting rod to move in the axial direction, and the connecting rod is adjusted in the movement stroke under the driving of the inner cylinder type hydraulic jack through the fixed position of the locking piece. The application is locked with the hand wheel rod of the pneumatic two-position valve execution structure through the action end of the connecting rod, and the inner cylinder type hydraulic jack is used to apply the acting force to the hand wheel rod to balance the disc spring acting force in the pneumatic two-position valve, so that the connecting bolt of the pneumatic two-position valve box body is in the non-stress state and can be directly removed, and the disassembly and maintenance difficulty of the pneumatic two-position valve is reduced.

Description

Technical Field

[0001] This application relates to the field of equipment maintenance technology, and in particular to a spring load safety unloading tool. Background Technology

[0002] The switching of the pneumatic two-position valve in the power plant is achieved by adjusting the compression state of the disc spring through air pressure. Because the disc spring needs to be pre-compressed on the actuator during assembly to keep the valve body seated, the upper and lower diaphragm boxes of the pneumatic two-position valve are subjected to the elastic force of the disc spring. When disassembling and repairing the actuator, it is necessary to replace the fastening bolts between the upper and lower diaphragm boxes with extended bolts. The nuts on the extended bolts are then gradually adjusted until the force of the disc spring is fully released before the fastening bolts between the upper and lower diaphragm boxes are removed. This process is not only complex but also requires uniform adjustment of multiple extended bolts; otherwise, problems such as bolt breakage and stripping can easily occur, leading to personnel safety accidents and equipment damage. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a spring load safety unloading tool to reduce the difficulty of disassembling the actuator of a pneumatic two-position valve and improve the safety and efficiency of disassembly.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A spring load safety unloading tool, comprising:

[0006] A connecting rod, the actuating end of which can be locked into the handwheel lever of the pneumatic two-position valve actuator, and a locking element is fixedly provided on the connecting rod;

[0007] An inner-cylinder hydraulic jack is connected in series between the moving end of the connecting rod and the locking member to drive the connecting rod to move axially. The connecting rod's stroke under the drive of the inner-cylinder hydraulic jack is adjusted by the fixed position of the locking member.

[0008] Preferably, in the above-mentioned spring load safety unloading tool, the actuating end of the connecting rod is provided with a connecting groove, and one end of the handwheel rod is embedded in the connecting groove.

[0009] Preferably, in the above-mentioned spring load safety unloading tool, the connecting groove is provided with an internal thread and is threadedly locked to one end of the handwheel rod.

[0010] Preferably, in the above-mentioned spring load safety unloading tool, the length of the actuating end is 90mm-110mm, and the depth of the connecting groove is 55mm-65mm.

[0011] Preferably, in the above-mentioned spring load safety unloading tool, the outer circumference of the connecting rod is provided with threads, and the locking element is a nut that is threadedly engaged with the connecting rod.

[0012] Preferably, in the above-mentioned spring load safety unloading tool, the locking member is a stepped nut, and the first-stage stepped structure with a larger cross-section of the locking member is positioned towards the inner cylinder hydraulic jack.

[0013] Preferably, in the above-mentioned spring load safety unloading tool, the length of the connecting rod is 330mm-350mm, and the outer diameter of the connecting rod is 30mm-34mm.

[0014] Preferably, in the above-mentioned spring load safety unloading tool, the outer periphery of the connecting rod is provided with a connecting groove, and the locking member is a limiting block and is snapped into the connecting groove.

[0015] Preferably, in the above-mentioned spring load safety unloading tool, at least two sets of connecting grooves are provided at intervals along the axial direction of the connecting rod.

[0016] Preferably, in the above-mentioned spring load safety unloading tool, at least two connecting grooves are evenly provided in the circumferential direction of the connecting rod.

[0017] From the above technical solution, it can be concluded that the spring load safety unloading tool provided in this disclosure mainly includes a connecting rod, a locking component, and an inner cylinder hydraulic jack. The connecting rod includes an actuating end connected to the handwheel rod of a pneumatic two-position valve actuator, and cooperates with the handwheel rod to transmit force to it. Simultaneously, the connecting rod and the inner cylinder hydraulic jack are connected in series, allowing the connecting rod to move axially through the inner cylinder hydraulic jack. The connecting rod's contact with the handwheel rod applies force to it. Adjusting the force of the inner cylinder hydraulic jack to balance the force of the disc spring allows the upper and lower diaphragm boxes to... The fastening bolts between the components are in a non-stressed state, allowing for smooth disassembly of the actuator. After disassembly, the inner cylinder hydraulic jack can slowly release the connecting rod, thereby gradually releasing the spring force of the disc spring via the handwheel. Simultaneously, a locking element is fixedly installed on the connecting rod. During the process of the inner cylinder hydraulic jack driving the connecting rod to apply pressure to the handwheel, the locking element abuts against one side of the inner cylinder hydraulic jack after the connecting rod has traveled a certain distance, preventing further movement of the connecting rod and avoiding damage to the disc spring and other structures caused by the driving action of the inner cylinder hydraulic jack. This enhances the safety of using the spring load unloading tool. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A side view of the locking member of the spring load safety unloading tool provided in an embodiment of this disclosure when it comes into contact with the inner cylinder hydraulic jack;

[0020] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure.

[0021] in:

[0022] 10-Connecting rod; 110-Actuating end; 120-Connecting groove; 20-Locking component; 30-Inner cylinder type hydraulic jack. Detailed Implementation

[0023] The core of this application is to disclose a spring load safety unloading tool to reduce the difficulty of disassembling the actuator of a pneumatic two-position valve and improve the safety and efficiency of disassembly.

[0024] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model described in the claims. Additionally, the complete content of the structures represented in the following embodiments is not limited to those necessary for the solution of the utility model described in the claims.

[0025] like Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a spring load safety unloading tool, which mainly includes a connecting rod 10, a locking member 20, and an inner cylinder hydraulic jack 30. The connecting rod 10 includes an actuating end 110, which can extend into a pneumatic two-position valve and lock into the handwheel rod of the pneumatic two-position valve actuator. It should be noted that when the actuating end 110 of the connecting rod 10 is engaged with the handwheel rod, the handwheel of the pneumatic two-position valve actuator needs to be removed to allow the connecting rod 10 to extend in.

[0026] The locking engagement between the connecting rod 10 and the handwheel lever is specifically such that the connecting rod 10 is locked in position with the handwheel lever in its axial direction, and can apply an axial force to the handwheel lever, thereby driving the handwheel lever to move along the axial direction, thus achieving the action of the switch actuator and applying a force to the disc spring.

[0027] Based on this, the connecting rod 10 is connected in series with the inner cylinder hydraulic jack 30, so that the connecting rod 10 can move along its axial direction through the inner cylinder hydraulic jack 30, thereby applying a force to the handwheel rod and driving the handwheel rod to move. By adjusting the force of the inner cylinder hydraulic jack 30, the force exerted by the connecting rod 10 on the handwheel rod is balanced with the elastic force of the disc spring. This allows the fastening bolts between the upper and lower diaphragm boxes in the pneumatic two-position valve to be in a non-stressed state. At this time, the operator can easily remove the fastening bolts between the upper and lower diaphragm boxes and safely disassemble the actuator. Compared with the existing technology, it does not require additional extension bolts and does not need to consider the problem of uneven force, thus providing a more convenient operation process.

[0028] Meanwhile, due to the single-point contact between the connecting rod 10 and the handwheel lever, after disassembling the actuator, the inner cylinder hydraulic jack 30 can slowly release the connecting rod 10, so that the spring force of the disc spring can be slowly released through the handwheel lever. There is no need to consider the problem of uniformity of displacement at each point during the release process, thus achieving higher operating efficiency.

[0029] Furthermore, a locking element 20 is fixedly installed on the connecting rod 10. It should be noted that in the initial state where the connecting rod 10 and the inner cylinder hydraulic jack 30 are connected in series, the locking element 20 is spaced apart from one side of the inner cylinder hydraulic jack 30. When the inner cylinder hydraulic jack 30 drives the connecting rod 10 to apply pressure to the handwheel rod, that is, when the movement of the connecting rod 10 drives the handwheel rod, the locking element 20 can abut against one side of the inner cylinder hydraulic jack 30 after the connecting rod 10 has moved a certain distance, thus preventing the connecting rod 10 from continuing to move. This allows the inner cylinder hydraulic jack 30 to have a limit position when it applies force to the handwheel rod through the connecting rod 10, and can visually show the position where the driving force of the inner cylinder hydraulic jack 30 on the connecting rod 10 and the elastic force of the disc spring are balanced, thus avoiding damage to the handwheel rod and the disc spring.

[0030] It should be noted that the movement stroke of the connecting rod 10 in the above embodiments is set by the designer according to the spring requirements for unloading. By adjusting the installation position of the locking member 20, it is possible to operate disc springs with different spring unloading requirements, thereby improving the versatility of the spring load safety unloading tool provided in this embodiment, avoiding damage to the disc spring and other structures by the driving action of the inner cylinder hydraulic jack 30, and improving the safety of the spring load safety unloading tool during use.

[0031] Furthermore, in the spring load safety unloading tool provided in the embodiments of this disclosure, the stable docking of the connecting rod 10 and the handwheel rod is the basis for achieving unloading. Therefore, in some embodiments of this disclosure, the actuating end 110 of the connecting rod 10 is also provided with a connecting groove 120. The inner diameter of the connecting groove 120 is larger than the outer diameter of the end of the handwheel rod, so that one end of the handwheel rod is embedded in the connecting groove 120. The connected rod 10 and the handwheel rod, which are fitted together, can achieve stable docking in the axial direction. Even when there is a certain offset force, they can still maintain the docking state through the action of the connecting groove 120, thereby improving the stability effect of the connecting rod 10 in the driving process of the handwheel rod.

[0032] It should be noted that the connecting groove 120 and the end of the handwheel rod can be either a clearance fit or an interference fit, such as by providing an elastic layer on the inner wall of the connecting groove 120 to achieve an interference fit with the end of the handwheel rod. In some embodiments of this disclosure, the connecting groove 120 is provided with an internal thread to engage with an external thread on one end of the handwheel rod. The connecting rod 10 and the handwheel rod are locked by screwing. The threaded engagement structure can facilitate the assembly and disassembly of the connecting rod 10 and the handwheel rod while maintaining a stable connection, thereby improving the efficiency of the spring load safety unloading tool.

[0033] Furthermore, it should be noted that, in order to ensure that the stroke of the connecting rod 10 meets the compression and unloading requirements of the disc spring, in the spring load safety unloading tool provided in this embodiment, the length of the connecting rod 10 is 330mm-350mm, preferably 340mm, and the outer diameter of the connecting rod 10 is 30mm-34mm, preferably 32mm, so that the connecting groove 120 has a sufficient slotting diameter to meet the docking with the handwheel rod.

[0034] Based on this, in order to ensure the stable docking of the connecting groove 120 and the handwheel lever, and to ensure the stability of the force transmission process from the connecting rod 10 to the handwheel lever, in some embodiments of this disclosure, the length of the actuating end 110 is 90mm-110mm, preferably 100mm, to have sufficient axial dimensions to meet the force transmission requirements, while the depth of the connecting groove 120 is 55mm-65mm, preferably 60mm. The depth setting of the connecting groove 120 can meet its depth requirements on the actuating end 110, so that the handwheel lever has sufficient embedding depth to maintain connection stability. At the same time, the depth setting of the connecting groove 120 ensures that the actuating end 110 still has sufficient ungrooved area, thus maintaining the strength requirements of the actuating end 110.

[0035] Furthermore, in the spring load safety unloading tool provided in this embodiment, the locking member 20 is disposed on the connecting rod 10 to limit the stroke of the connecting rod 10. It needs to be fixedly disposed on the outer wall of the connecting rod 10 and form a protrusion. To improve the versatility of the spring load safety unloading tool, it also needs to achieve position adjustment in the axial direction of the connecting rod 10 to meet the limiting requirements of different strokes. In some embodiments of this disclosure, the locking member 20 is a nut structure. Specifically, the outer circumference of the connecting rod 10 is threaded, and the locking member 20 engages with the threaded outer circumference of the connecting rod 10. The nut-structured locking member 20 can not only achieve position adjustment along the axial direction of the connecting rod 10 through rotation, but also achieve position locking through thread engagement, resulting in a stable connection and convenient adjustment process.

[0036] Based on the above embodiments, the locking member 20 can also be configured as a stepped nut, that is, composed of two circular ring structures of different sizes. At the same time, the larger first-stage stepped structure of the locking member 20 is set towards the inner cylinder hydraulic jack 30. The stepped nut will not affect the connection effect between the locking member 20 and the connecting rod 10. At the same time, through its larger stepped structure, it can have a larger contact area with the inner cylinder hydraulic jack 30 when the stroke limit of the connecting rod 10 is performed, thereby improving the stability of the contact limit process.

[0037] In other embodiments of this disclosure, the locking member 20 can also form a protruding structure based on the outer wall of the connecting rod 10 through a plug-in structure. Specifically, a connecting groove 120 is provided on the outer periphery of the connecting rod 10, and the locking member 20 is a limiting block, which is snapped into the connecting groove 120. Compared with the nut structure, the limiting block that is plugged into and snapped into the connecting groove 120 has a more convenient connection method. It does not require multiple rotations from the end of the connecting rod 10 to reach the predetermined setting position, which can significantly improve the efficiency of the locking member 20 in the process of assembling and disassembling on the connecting rod 10.

[0038] Furthermore, based on the above embodiments, in order to improve the locking member 20 of the insertion structure on the connecting rod 10 and the abutment effect of the inner cylinder hydraulic jack 30, at least two connecting grooves 120 are provided along the circumference of the connecting rod 10, and at least two connecting grooves 120 are evenly distributed about the connecting rod 10. The limiting blocks are provided one-to-one with the connecting grooves 120, so that when the locking member 20 abuts against one side of the inner cylinder hydraulic jack 30, it can provide a more uniform abutment force through the limiting blocks evenly distributed along the circumference of the connecting rod 10, thereby reducing the risk of deflection of the connecting rod 10 and the risk of limiting failure.

[0039] Furthermore, it should be noted that, in order to meet the position adjustment requirements of the locking member 20 in the axial direction of the connecting rod 10, in some embodiments of this disclosure, at least two sets of connecting grooves 120 are provided at intervals in the axial direction of the connecting rod 10, and several sets of a single set of connecting grooves 120 can be provided. The limiting block can provide different stroke limits by inserting into different sets of connecting grooves 120, thereby meeting the universal requirements of the spring load safety unloading tool.

[0040] The terms "first," "second," "left side," and "right side," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may not be defined in the listed steps or units, but may include steps or units not listed.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. 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 this application. Therefore, this application 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 spring load safety unloading tool characterized by, include: A connecting rod, the actuating end of which can be locked into the handwheel lever of the pneumatic two-position valve actuator, and a locking element is fixedly provided on the connecting rod; An inner cylinder hydraulic jack is connected in series between the moving end of the connecting rod and the locking member to drive the connecting rod to move axially. The connecting rod abuts against one side of the inner cylinder hydraulic jack through the locking member, and its stroke under the drive of the inner cylinder hydraulic jack is adjusted by the installation position of the locking member.

2. The spring load safety unloading tool of claim 1, wherein, The actuating end of the connecting rod is provided with a connecting groove, and one end of the handwheel rod is embedded in the connecting groove.

3. The spring load safety unloading tool of claim 2, wherein, The connecting groove is provided with an internal thread and is threaded to one end of the handwheel lever.

4. The spring load safety unloading tool of claim 2, wherein, The length of the actuating end is 90mm-110mm, and the depth of the connecting groove is 55mm-65mm.

5. The spring load safety unloading tool of claim 1, wherein, The outer circumference of the connecting rod is threaded, and the locking element is a nut that engages with the threaded connection of the connecting rod.

6. The spring load safety unloading tool of claim 5, wherein, The locking component is a stepped nut, and the larger first-stage stepped structure of the locking component is oriented towards the inner cylinder hydraulic jack.

7. The spring load safety unloading tool of claim 1, wherein, The length of the connecting rod is 330mm-350mm, and the outer diameter of the connecting rod is 30mm-34mm.

8. The spring load safety unloading tool of claim 1, wherein, The outer periphery of the connecting rod is provided with a connecting groove, and the locking element is a limiting block that is snapped into the connecting groove.

9. The spring load safety unloading tool of claim 8, wherein, The connecting grooves are provided in at least two sets at intervals along the axial direction of the connecting rod.

10. The spring load safety unloading tool as described in claim 8, characterized in that, At least two connecting grooves are evenly arranged circumferentially on the connecting rod.

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